• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1000215A1
    申请号:SE1000215
    申请日:2010-03-08
    公开日:2011-09-09
    发明作者:Daniel Jilderos
    申请人:Tour & Andersson Ab；
    IPC主号:
    专利说明:

    15 20 25 measuring hose side, i.e. from the medium found inside the measuring hose (s) after the measurement has been completed, to which the above-mentioned constructions do not provide a solution. Of course, it is assumed that the measuring nipples are so constructed that they do not leak after completion of the measurement, but this is not the problem which the present invention addresses. Furthermore, in the present invention, it is possible to flush the measuring system before starting measurement, which is an important property for removing air from the system and for calibrating the connected measuring instrument at zero point. This is done by a non-return valve in the open position being short-circuited and liquid flushing the complete measuring needle backwards, when two measuring needles are used in pairs, which they do when measuring and this does not give the above-mentioned constructions any solution.
    With the invention in question, a number of advantages relative to existing constructions have been obtained in connection with a measurement being terminated: - a direct shut-off between measuring hose and measuring probe takes place at the moment the measuring probe is removed from the measuring nipple - no leakage from the medium in the measuring hose occurs no risk of work injury due to an involuntary leakage from the measuring probe - a generally improved working environment during the measurement process and in the room by eliminating all leakage - the complete measuring needle check valve function is short-circuited during flushing which gives safer measuring results - the complete measuring needle is directly prepared for The constructive embodiment of the present invention is described in detail below. In addition, the invention advances the state of the art in the field in various respects. This is realized in the present invention in that a device of the type described below is substantially as described in the core design part of claim 1. Further features and advantages of the invention appear from the following description with reference to the accompanying drawings. , which shows a preferred, but non-limiting embodiment of the invention.
    In detail represents in diametrical, partly schematic cross-sections or perspective views: - Fig. 1 a fl uids system where the complete measuring needle is included.
    Fig. 2 shows a compilation of an exemplary embodiment of a complete measuring needle according to the invention.
    Fig. 3 a measuring pin mounted on a measuring nipple with open communication between measuring probe / measuring nipple and the measuring instrument.
    Fig. 1 shows an example of how two measuring needles complete 1 are mounted on a measuring nipple 3 which in turn is included in a valve 2 or pipeline and the figure also shows schematically that measuring hoses 5 emanate completely from the measuring needle which are connected at their other end to a measuring instrument 4.
    To measure pressure or temperature in a pipe system or in a container or the like, the complete measuring needle 1 is mounted on a measuring nipple 3 and thus, via a measuring probe 10, makes contact with the medium to be measured. The medium then gets fatal contact with the measuring instrument 4 via the measuring probe 10, a measuring needle housing 6 and further via the measuring hose 5.
    Fig. 2 shows a measuring needle complete in a sectional view.
    The complete measuring needle 1 consists of the measuring needle housing 6, with a hose nipple 7, for connecting the measuring hose 5, a non-return valve 8, the measuring probe 10, a return spring 13 and a locking washer 15 with a return spring 16.
    The measuring needle housing 6 is alternatively made of plastic or a metal alloy and has in its rear part 19 relative to the hose nipple 7 a cavity 20 which is dimensionally coordinated with the outer dimensions of the non-return valve 8. The cavity 20 also has a recess 14 in its upper part and the recess 14 opens out towards the surroundings. In the front part of the measuring pin housing 6 there is a preferably cylindrically occupied cavity 25 which extends from the hose nipple 7 to the cavity 20 and where the hollow tube 25 thus opens into the hose nipple 7.
    The non-return valve 8 is described by different parts, a lower part 17 and an upper part 18, connected to a center part 21 with a preferably smaller diameter compared to the two parts 17 and 18, respectively. The center part 21 also has one or more occupied holes 26 preferably perpendicular to the non-return valve. 8 longitudinal axis. Externally, the two parts 17 and 18 are provided with seals 9 on the respective peripheral surface. The upper part 18 has two seals placed on its outer parts of the peripheral surface, while the lower part 17 is provided only with an outer seal placed in a tested position on the peripheral surface. In addition, the two parts 17 and 18 each have an internal sealing element, preferably a seal 22 which is preferably located in the lower part of the parts.
    In the upper part of the cavity 20 and above the non-return valve 8, the return spring 13 is mounted and in this zone the recess 14 is also towards the surroundings.
    The upper part of the cavity 20 also comprises an internal stop lug 32 which constitutes a stop for the non-return valve 8 and thus indicates the upper limit position for the non-return valve. The upper part 20 of the cavity, in which the return 13 vein 13 is mounted, is not in contact with the iden uiden.
    The measuring probe 10 is fixedly mounted in the upper part of the measuring needle housing 6 and is fixed in a suitable manner, for example cast or fixed with an Allen screw 23 which presses the rear, preferably cantilevered part 24 of the measuring probe against the measuring needle housing and the measuring probe is preferably centered relative to the check valve 8.
    The measuring probe is tubular and provided with two openings 11 and 12. The opening 11 is located in the lower part of the probe nära, near the end of the probe, while the opening 12 is placed at a tested distance up on the measuring probe 10. The measuring probe has a length outside, or below the measuring needle housing 6 which is adapted to the normally commercially available measuring nipples so that the opening 11 always enters the medium which is to be sensed in terms of pressure or temperature when the measuring needle is completely mounted on or against the measuring nipple 3.
    Before the complete measuring needle 1 is connected to the measuring nipple 3, but when the measuring probe 10 has passed the sealing element in the measuring nipple 3, and before the non-return valve 8 comes into physical contact with the measuring nipple 3, the measuring probe contacts the medium and the center part 21 of the non-return valve 8. this position is still the non-return valve 8 in its original position and thus the seals 9, on the upper part 18, seal against the upper part of the cavity 20 and against the cavity 25, and thus also against the measuring hose 5. The seal 9, on the lower part 17, also seals in this position against an external leak. The inner seals 22 seal between the measuring probe 10 and the non-return valve 8.
    Mounted on the measuring pin housing 6 and its lower part 31 is the capercaillie-loaded locking washer 15 with the return spring 16, the assembly and function of which are described below.
    Figs. 2b and 2c show an example of the design of the locking washer 15 and fastening to the lower part 31 of the measuring pin housing 6.
    On the lower part 31 of the measuring pin housing 6 there is the locking washer 15 and in connection with that return spring 16 for locking the complete measuring pin 1 to the measuring nipple 3 in connection with a measurement being carried out. The lock washer preferably has an opening 30 which together with the non-return valve 8 and the measuring nipple 3 forms two or two positions for locking and disengaging the complete measuring needle 1 to or from the measuring nipple 3, respectively.
    On the lower part 31 of the measuring pin housing 6 there is preferably a groove 28 where the upper guide arm 33 of the lock washer 15 can run perpendicular to the axial longitudinal direction 10 of the non-return valve 8 and preferably a recess 29 in which the return spring 16 is mounted. The return spring is clamped between the lock washer 15 and the bottom of the recess 29. The lock washer 15 is held in place by the lower, preferably cylindrical part 27 of the non-return valve 8, reaching through the opening 30 of the lock washer and the lock washer 15 in turn constitutes a lower stop for the non-return valve 8, since the lower part 17 of the non-return valve has a larger dimension the lock washer.
    Fig. 3 shows a measuring needle completely mounted on a measuring nipple.
    When the complete measuring needle 1 is mounted on the measuring nipple 3, the non-return valve 8 in the measuring needle housing 6 is moved axially towards the return spring 13 which is thereby compressed until the non-return valve 8 reaches its upper position against the stop lug 32. In this position the non-return valve 8 and its upper part 18 have been moved so far back in the cavity 20 that the center part 21 of the non-return valve has reached a position in the middle of the hollow tube 25 and in this position the seals 9, on the upper part 18, seal against the upper part of the cavity 20 and the seal 9, on the lower part 17, towards the lower part of the cavity 20. Thus a sealing takes place on both sides of the connection of the cavity 25 to the cavity 20. When the non-return valve 8 is in this upper position the communication is open from the medium via the measuring probe 10 and its openings 11 and 12 up to the non-return valve 8 and its center part 21 and further via holes / holes 26 in the non-return valve 8, through the cavity 25 and via the measuring hose 5 to the measuring instrument 4. In this position there is the same static overpressure as the medium has, he la the way to the measuring instrument 4. When the communication in this position is open, the construction of the complete measuring needle in both directions is allowed, through the construction of the non-return valve 8. This is an advantage when the complete measuring needle when measuring works in pairs with another similar measuring needle, and then flushes out, due to the pressure difference across the valve 2 in the direction from the high pressure side to the low pressure side, whereby one measuring needle is flushed backwards. In this operating mode, the measuring system is flushed and any air disappears from measuring hoses and measuring instruments, whereby the zero point calibration of the instrument 10 15 20 25 is ensured with a more reliable measuring result as a result.
    To facilitate connection of the complete measuring needle 1 to the measuring nipple 3, there is the recess 14 which eliminates the risk of compressed air in the space above the non-return valve 8 where the return spring 13 is located.
    When the complete measuring needle 1 is mounted on the measuring nipple 3, the return fi edge 16 pushes out the lock washer 15 and the complete measuring needle 1 is locked to the measuring nipple 3. This is made possible by a dimensional difference between the lower cylindrical part 27 of the non-return valve 8 and the lower part 27 has a larger diameter than the measuring nipple, and when the non-return valve 8, when connecting the complete measuring needle 1 to the measuring nipple 3, leaves its initial position and is moved in the direction of the return spring 13, when the measuring nipple is pressed into the lower part 31 of the measuring needle housing, diameter, opposite the opening of the lock washer 30. The design of the opening 30 by the lock washer 15 makes it possible for the return spring 16 to push out the lock washer 15 and thereby lock the complete measuring needle 1 on the measuring nipple 3. Thus the complete measuring needle 1 is held in place relative to the measuring nipple 3.
    The overpressure that arises in the measuring hose 5 during the measuring procedure normally leads to the measuring hose 5 expanding unless it is of an unreliable material, which in that case entails increased costs for the measuring hose 5 and an impractical assembly work. With a complete measuring needle according to current technology, a leakage will occur from the measuring hose, via the measuring probe, in connection with the measuring probe being dismantled from the measuring nipple.
    Today's technology has the disadvantage that the liquid with the high pressure and in some cases also the high temperature present in the expanded measuring hose squirts out of the measuring needle hole 11 during removal from the measuring nipple 3, with danger to the operator's health. The device according to the invention eliminates this risk of leakage from the measuring hose 5 by, when disconnecting the complete measuring needle 1 from the measuring nipple 3, first disengages the lock washer 15 by pressing it against the lower part 31 of the measuring needle housing 6. In this position the measuring nipple 3 is exposed relative to the lock washer 15, after which the complete measuring needle 1 can be removed from the measuring nipple 3 and in connection therewith the return spring 13 forces the non-return valve 8 back to its initial position in the measuring needle housing 6. With the non-return valve 8 in this position the lock washer grips The non-return valve 8 is x positioned for the next measurement.
    When the non-return valve 8 has returned to its initial position, the two seals 9 mounted on the upper part 18 of the non-return valve 8 will be located on opposite sides of the cavity 25 and its outlet in the cavity 20 and thus there is a tightness from the cavity 25 upwards towards the return spring. 13 as downwards towards the non-return valve 8 and its center part 21 and the open communication from the measuring hose 5 via the cavity 25 up to the non-return valve 8 is thus closed. With the non-return valve 8 in this position, the medium from the measuring hose 5 is thus prevented from leaking out to the surroundings.
    The overall function of the complete measuring needle is that the non-return valve 8 is moved to a position in the cavity 20 in connection with a measurement being performed and that in this position there is an open communication from the medium all the way to the measuring instrument 4 and that after measurement the compressed the return spring 13 pushes back the non-return valve 8 to the initial position where the non-return valve closes the communication from the measuring instrument 4 and from the measuring hose 5 to the measuring probe 10, respectively, and when sold, the volume enclosed in the hose 5 cannot have other functions such as leaking. Non-return valve sealing element holder and d fate channel. The device has created the condition for using measuring hoses of normal quality, since the expansion that takes place out of the measuring hose due to overpressure does not involve a leakage from the measuring needle / measuring probe, which previous constructions of complete measuring needles have given rise to. 10 15 1 = measuring needle1 complete 4 = measuring instrument 7 = hose nipple 1 0 = measuring probe 13 = return fi spring 1 6 = return fi spring l9 = rear part 22 = seal 25 = cavity 28 = groove 3 l = lower part of the measuring needle housing 10 PARTS LIST 2 = valve 5 = measuring hose 8 = non-return valve ll = opening 1 4 = recess l7 = lower part 20 = hollow pipe 23 = Allen screw 26 = hole 29 = recess 32 = stop lug 3 = measuring nipple 6 = measuring needle housing 9 = seal l2 = opening 1 5 = lock washer l8 = upper part 2 l = center part 24 = cantilever 27 = lower part 30 = lock washer open. 33 = upper control arm
    权利要求:
    Claims (11)
    [1]
    Device comprising a system for measuring the pressure and / or temperature of a fl uid and wherein the device is a measuring needle complete (1), wherein the measuring needle completely consists of a measuring needle housing (6) with a hose nipple (7) for connection of a measuring hose (5) and where in the measuring needle housing (6) there is a non-return valve (8), a return spring (13), a measuring probe (10) and a locking washer (15), characterized in that the non-return valve (8) is displaced in a cavity (20). ) of the measuring needle housing (6) in connection with the measuring needle being completely mounted on a measuring nipple (3), a communication being opened from the outside via a first opening (11) in the measuring probe (10), through the measuring probe and further via a second opening (12). in the measuring probe to the non-return valve (8) and its center part (21) where the center part has holes (26) out to the cavity (20) and further via a cavity (25) to the hose nipple (7) and finally further via the measuring hose (5) to a measuring instrument (4) and the communication is opened by moving the non-return valve (8) and its upper part (18) so far back in the eel cavity (20) that the center part (21) of the non-return valve has reached a position where there is an open communication with the cavity (25).
    [2]
    Device according to claim 1, characterized in that when the measuring needle is completely (1) removed from the measuring nipple (3), the return spring (13) will push the non-return valve (8) back to the initial position of the non-return valve, the communication from the measuring hose (5) and the cavity (25) is closed in that seals (9) mounted on the upper part (18) of the non-return valve (8) will be located on opposite sides of the cavity (25) and its outlet in the cavity (20) and thus there is a tightness from the cavity tube. (25) both upwards towards the return spring (13) and downwards towards the center part (21) of the non-return valve (8) and thus it is also tight towards the opening (11) of the measuring probe (10). 10 15 20 25 12
    [3]
    Device according to claim 1, characterized in that when the measuring needle is complete (1) in the mounted position on the measuring nipple (3), a flushing of the fl is allowed through the complete measuring needle (1) in the direction from the hose nipple (7) to the opening (11) in that the non-return valve (8) then settles in its rear position in the cavity (20) and thereby the communication between the valve and the measuring instrument (4) is open, and this takes place at one of the, in normal measuring procedure, in pairs to the measuring nipples (3) connected the complete measuring needles (1) at the same time as fl uidet in the other measuring needle flows in the opposite direction.
    [4]
    Device according to claim 1, characterized in that the measuring needle housing (6) has the cavity (20) which is dimensionally coordinated with the non-return valve (8) and its outer seals (9). In addition, the cavity has a recess (14) in its upper part towards the environment and a stop lug (32) in the upper part of the cavity where the stop lug gives the non-return valve (8) its upper limit position / working position.
    [5]
    Device according to claim 1, characterized in that the cavity (20) in the measuring needle housing (6) has the recess (14) and that the recess (14) eliminates the risk of compressed air in the space above the non-return valve (8) when the non-return valve is extended up to its upper position, against the stop heel (32)
    [6]
    Device according to claim 1, characterized in that the non-return valve (8) has the upper part (18) and a lower part (17) connected to the center part (21) with a preferably smaller dimension compared to the two parts (17) and ( 18), wherein the center part (21) has a number of holes (26) perpendicular to the longitudinal axis of the non-return valve (8), the parts (17) and (18) respectively being provided with the seals (9) on the respective peripheral surface and an internal sealing element, a seal ( 22), where the outer seals (9) seal against the cavity (20) and the inner seals (22) seal against the measuring probe (10). 10 15 20 25 13
    [7]
    Device according to claim 1, characterized in that the locking washer (15) is mounted on a lower part (31) of the measuring pin housing (6) in a groove (28) and where the locking washer has an opening (30) with varying cross-sections, and the locking washer cooperates with a return spring (16) where the return spring is clamped between the lock washer (15) and a recess (29) in the lower part (31) of the measuring pin housing (6) and where the opening (30) has been selected so that the lock washer (15) grips the lower part (27) of the non-return valve (8) and thus the non-return valve (8) moves into position for the next measurement.
    [8]
    Device according to claim 1, characterized in that the locking washer (15) also fixes the complete measuring needle (1) on the measuring nipple (3) by, during the connection method, pressing the complete measuring needle (1) against the measuring nipple (3), the measuring nipple acting on the non-return valve ( 8) which learns its initial position and is moved in the direction of the return spring (13), when the measuring nipple is pressed into the lower part (31) of the measuring needle housing, and then the measuring nipple, which is normally smaller in diameter than the lower cylindrical part (27) of the non-return valve, ends in the opening (30) of the lock washer, whereby the return spring (16) pushes out the lock washer (15) which thereby locks the complete measuring needle (1) on the measuring nipple (3).
    [9]
    Device according to claim 1, characterized in that the upper end position of the non-return valve (8) in the upper part of the cavity (20) is adapted so that the communication from the outside to the measuring instrument (4) is then open, while the lower end position of the non-return valve (8) is the same as initial position, before mounting on the measuring nipple (3) in which the non-return valve then seals against the measuring probe (10) and thus also against its first opening (1 1).
    [10]
    Device according to claim 1, characterized in that the upper end position of the non-return valve (8) is determined by an internal stop lug (32) relative to the upper end of the cavity (20) and the lower end position of the non-return valve is determined by the lock washer (15). 14
    [11]
    Device according to Claim 1, characterized in that the return spring (13) is never affected by the flow, in that the outer seal (9) on the upper part (18) of the non-return valve (8) always seals against the cavity (20).
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1000215A|SE534669C2|2010-03-08|2010-03-08|Measuring needle with check valve function|SE1000215A| SE534669C2|2010-03-08|2010-03-08|Measuring needle with check valve function|
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    US13/519,354| US8528430B2|2010-03-08|2011-01-25|Measuring needle with non return valve function|
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