• 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:
    A switch-over valve for directing a compressed air flow to either one of two drying towers (7, 8) of an air drier, the other one being vented to the atmosphere. The valve (31) is arranged in a partition wall (10) between the two towers, a conduit (30) to the valve being provided in the wall. A valve body (40) is axially movable in a cavity (41) in the wall between two positions sealing off either one of the outlets from the cavity and keeping the other one open. A control piston (39) with a greater length than the valve body is axially movable in a bore in the valve body and is biased towards a neutral position by spring means (46).
    公开号:SU1657071A3
    申请号:SU874203705
    申请日:1987-11-02
    公开日:1991-06-15
    发明作者:Неландер Оче；Эвалл Ларс
    申请人:Гарфюттан Хальдекс Аб (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to reinforcement and is intended for air dryers with two towers.
    The aim of the invention is to increase the reliability of operation by redistributing the forces acting on the mobile system in the switching process.
    FIG. 1 shows a compressed air system, for example, an all-terrain vehicle, general view; in fig. 2 - air dryer, side view; in fig. 3 shows section A-A in FIG. 2; in fig. 4 - the same section in BB; in fig. 5 - valve.
    A compressed air system designed primarily for use on all-terrain vehicles (Fig. 1). contains the compressor 1, the air dryer 2, the pipe 3 from the compressor to the dryer and the pipe 4 from the air dryer to the air tank (not shown). After a certain working pressure has been reached in the air reservoir and, therefore, in the pipe 4, the control valve 5 sends a signal to the unloading valve 6 embedded in the air dryer 2 to release the air supplied by the compressor to the atmosphere.
    In the general case, an air dryer (Fig. 2) consists of a left drying tower 7, a right drying tower 8, and a central part containing valves and other means necessary for the normal operation of an air dryer. Each dryer tower 7 and 8 includes a filter and desiccant in the cartridge.
    During operation, compressed air enters through one of the towers for drying (in Fig. 2, the tower 8 is right, as shown by larger arrows). At the same time, the other tower is regenerated, i.e., the desiccant in it is dried from moisture absorbed in the previous air drying cycle. The regeneration is due to the fact that a small amount of dried air supplied from the air dryer is passed through this tower for regeneration and then released into the atmosphere (as shown by smaller arrows in the left tower in Fig. 2). Switching between the two towers is carried out automatically after each signal in the form of a certain pressure in the pipeline from control valve 5 to discharge valve 6. Thus, the air dryer is always ready to handle large or small volumes of air.
    The central part 9 (Fig. 3) is divided into two chambers by a partition wall 10 in which a through hole is made.
    Air inlet duct 11 is connected to pipe 3. Air outlet duct 12 is connected to pipe 4 directed to an air tank, and
    It contains a spring check valve 13, which prevents the return of air from the air tank to the air dryer when the pressure is lower than the pressure in the air tank.
    The inlet air duct 11 is directed to the upper part of the cylindrical compartment in the separating wall 10. In this compartment there is a cylindrical filtering sleeve 14 fitted with an outer screw flange 15 which is hermetically connected to the compartment wall to form a screw duct below and outside the sleeve 14 for air entering through the intake port 11.
    0 Filtration sleeve 14 is filled
    metal wool 16 or a similar material in the lower half and foam foam 17 or a similar material in the upper half. 18 unloading building
    The valve 5 is hermetically connected to this compartment under the filter sleeve 14 and secured with a spring ring 19. In the lower part of the sleeve 14 there are holes for air passage from the screw
    0 channel from the outside to the inside of the sleeve.
    The unloading valve 6, installed in the lower part of the central part 9, includes a valve disc 20, a sealing ring 21. a stem 22 and a diaphragm 23. Push
    5, the spring 24 loads the diaphragm 23 and, in order to keep the valve disc in tight contact with the sealing ring 21. The diaphragm 25 is clamped in the housing 18 below the diaphragm 23 to seal the compartment
    0 of the pipeline connection 26 from the control valve 5. The valve body 18 is provided with openings 3 and 27, and the vent holes 28 are provided in the bottom of the valve body 18, in which the sounding material 29 is placed.
    - When the unloading valve 6 is closed (under the action of the spring 24), which corresponds to normal conditions and means that air can be dried, air flows at high speed into the screw channel formed by the screw flange 15. The screw channel is used as a cyclone in this way that water droplets or others are separated from the air and collected in the bottom zone near the valve disc 20. This separation occurs without significant flow restriction. After passing through the holes in the filter bag, air flows up through the material 16, where it is filtered or
    oil or other particles are separated, and through material 17, used as a filter for other particles.
    When the discharge valve 6 is opened in accordance with the signal from control valve 5 in the form of overpressure at junction 26, the valve disk 20 rises above the ring 21 so that air from the compressor enters the atmosphere without noticeable restriction through openings 27, sound absorbing material 29 and the vent holes 28, whereby the increased pressure in the entire air dryer drops to atmospheric pressure. Thus, water or similar material collected on the disk 20 is exhausted and the air flow from the air dryer is and the atmosphere enters through the materials 17 and 16, guides the oil was removed, the particles and the like materials collected therein. Thus, the flow rate can be adjusted by selecting the appropriate material, in particular foam 17, so that the desiccant in the corresponding drying tower 7 or 8 is not damaged,
    After the filter assembly, the compressed air enters through the air flow supply channel 30 to the switching valve 31, which is intended to direct the air flow to one of the two towers 7 and 8, depending on the position of the valve
    FIG. 4 shows the central part 9 and the left of the drying tower 7; the right drying tower 8 of the same construction as the left is also attached to the central part 9 but in this case is not shown for clarity
    Each drying tower has a dome-shaped container 32 attached to the central part 9 with screws 33. It contains a plastic cartridge 34, generally filled with desiccant 35, and a filter 36. The open end of which faces the central part 9. The cover 37 with air through holes is fixed on the chuck on this end. There is a separation wall 38 dividing the inside of the cartridge 34 into two halves, which are covered for airflow only near the dome-shaped end of the cartridge, where the separation wall 38 is provided with a hole. As a result, air entering the tower through one chamber is removed through the other, which provides an air channel that is twice as long as the tower. Additional separation walls can be used to increase the length of the air channel.
    The switching valve 31 contains a piston 39 which can move axially in the annular ring
    sealing element 40 sealing one of the chambers in extreme positions and mounted with the possibility of axial movement in the internal groove
    41 through holes in the separation wall 10, the channel 30 is directed into the groove 41. The sealing element 40 has a stepped cylindrical shape, steps of smaller diameter which correspond
    0 the diameter of the hole dividing wall. For the passage of air at the indicated steps, grooves 42 are made. At each transition between the steps, the sealing element 40 is provided with a 0-ring
    5 43 for sealing with a conical wall of the groove 41
    The piston 39 has a frictional closure with a sealing element 40 using two 0-rings 44. At
    At each end of the piston 39 there is a flange 45 and a pressure spring 46 that loads the piston relative to the walls of the partition 10.
    The switching valve 31 is working
    5 as follows.
    Starting with the position shown in FIG. 5 and 4, when the valve sealing element 40 is in the left position, the compressed air through the channel 30 enters the right
    0 tower 8. Under the action of overpressure in it, the piston 39 is supplied to the left, and its right flange is adjacent to the sealing element 40. Thus, the right spring 46 is compressed, and the left
    5 is stretched.
    When the relief valve 6 opens when the signal is applied from control valve 5, the pressure in each chamber is equalized. This means that the piston moves in the direction of the neutral position under the action of the right pressure spring 46, which displaces the sealing element 40 to the right, while the right 0-ring 43 is adjacent to the conical wall of the groove 41.
    When the discharge valve 6 is closed again and the compressed air enters the cavity through the channel 30, it enters the left tower 7, in which an increased
    0, the pressure displacing the piston to the right against the action of the left spring 46, until the left flange 45 rests against the sealing element 40.
    With the next unloading operation
    5, the sequence described above is repeated and a switch is made to the right drying tower 8.
    As follows from FIG. 5, the hole for the piston 39 in the sealing element 40 has a groove 47 slightly enlarged
    diameter in the direction of each end of such a length that one of the 0-shaped rings 44 is installed in the groove 47 in each extreme position of the piston 39, while the flange 45 abuts the sealing element 40. The larger diameter grooves 47 are designed to loosen the friction closure, ensuring guaranteed switching the piston 39 and, consequently, the entire valve 31, even if the overpressure acting on the piston 39 in any of its extreme positions decreases during switching. This is ensured by the fact that one of the 0-shaped rings 44 creates an initial resistance when exiting the groove 47 of an increased diameter and entering the hole of a normal diameter, after which less pressure is required to move it. Moreover, the other 0-ring 44 is moved into the groove 47 of increased diameter in the direction of the end of movement, which leads to a further reduction in frictional force, which is overcome by an overpressure force.
    In the design of the air dryer, two more valves are required not only for performing the main air drying cycle, but
    and for the simultaneous regeneration of descant in a tower that is not used for drying. The regeneration is carried out with a portion of dry air, which is removed from the dryer through the exhaust duct 12.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    Switch valve containing
    two chambers separated by a septum
    which made a through hole with
    an internal groove, communicated with the air flow supply channel under pressure, and an annular sealing element installed in said hole, sealing one of the
    chambers, communicated with the atmosphere, from the specified channel and covering the piston, loaded with springs relative to both walls of the partition, and the valve is equipped with friction means
    the closure of the sealing element and the piston, characterized in that. what. in order to increase reliability in operation, the frictional closure means is made in the form of two piston-mounted ones
    O-rings, and on the inner surface of the sealing element, grooves are made at both ends to loosen the friction closure at the end of the switch.
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    28 26 ft
    46
    Editor M. Tsitkina
    Tehred M. Morgenthal
    Order 2059 Draw 445 Subscription
    VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk emb. 4/5
    Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101
    FIG. five
    Corrector S.Cherni
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    同族专利:
    公开号 | 公开日
    EP0266838B1|1991-04-24|
    US4781209A|1988-11-01|
    SE8604687L|1988-05-04|
    CS787287A2|1990-09-12|
    HUT47172A|1989-01-30|
    SE8604687D0|1986-11-03|
    EP0266838A2|1988-05-11|
    JPS63135667A|1988-06-08|
    AT62830T|1991-05-15|
    EP0266838A3|1988-08-10|
    DE3769593D1|1991-05-29|
    BR8705873A|1988-06-14|
    HU199964B|1990-03-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN104197041A|2014-09-05|2014-12-10|陈巧琴|Valve with many air outlets|US2821972A|1956-01-05|1958-02-04|New Prod Corp|System for emptying a plurality of tanks and shuttle valve therefor|
    GB1235456A|1970-02-07|1971-06-16|Temple Instr Ltd|Fluid valves|
    US3734132A|1971-06-25|1973-05-22|Hoerbiger Ventilwerke Ag|Shuttle valve|
    DE2715936A1|1977-04-09|1978-10-12|Gemoc George Moskhalis & Co Kg|Two=way valve with pressure operated slider - free to rotate on rigid axis during sliding, suitable for compressed air and gas adsorption dryers|
    SE411707B|1978-02-20|1980-02-04|Geveko Ind Ab|DEVICE IN THE DRY CONDUCT FOR PRESSURE AIR|
    SE431289B|1980-12-09|1984-01-30|Sab Automotive Ab|AIR DRYING|
    US4512781A|1983-11-14|1985-04-23|Pittsburgh Brass Manufacturing Company|Shuttle valves and system for fluid control|SE459397B|1987-05-07|1989-07-03|Garphyttan Haldex Ab|VALVE IN A WASHER AIR Humidifier|
    SE461956B|1988-09-15|1990-04-23|Garphyttan Haldex Ab|AIR DRY VALVE CONTAINS VENTILATION OF ONE OF TWO DRYERS|
    US5685896A|1996-02-06|1997-11-11|Westinghouse Air Brake Company|Linear choke shuttle/orifice check valve mechanism for a twin tower air dryer|
    US5662727A|1996-02-06|1997-09-02|Westinghouse Air Brake Company|Twin tower air dryer for an air compressor unit|
    ID24111A|1997-06-25|2000-07-06|Jeffrey Karg|FLUID VALVE VALVE|
    US6000432A|1997-11-26|1999-12-14|Westinghouse Air Brake Company|Control valve with axial sealing|
    US7137788B2|2004-12-22|2006-11-21|Bendix Commercial Vehicle Systems Llc|Air compressor oil recirculation system|
    US9375679B2|2013-08-30|2016-06-28|Haldex Brake Products Corporation|Air dryer assembly with manifold system|
    KR20200041061A|2018-10-11|2020-04-21|현대자동차주식회사|System and method for removing residual pressure in the motor driven air compressor management system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8604687A|SE8604687L|1986-11-03|1986-11-03|REPLACEMENT VALVE, PREFERRED TO AN AIR DRYER|
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