• 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:
    To increase the service life of a pipe coupling (1) in a pipe (2, 3) intended for flowing liquid with a lower temperature than the ambient, the temperature difference can cause water vapor to condense on the pipe (2, 3) and the pipe coupling (1), is ahydrous, hydrophobic sealing substance (20) arranged on the outside of the coupling (1) and the coupling (1) with the sealing substance (20) is enclosed in a housing e (10). The sealing substance (20) is suitably a gel, preferably petroleum jelly, and can fill a substantially tubular space (11 ) between the inside of the housing (10) and the outside of the coupling (1). The housing (10) may be sufficiently elastic to be able to be tilted over the coupling (1), or alternatively be provided with a longitudinal slot (12) or be divided into two halves. The slot or halves are then provided with hooks (16) or male and female means (14 and 15, respectively) which form a snap connection for closing at least one long side of the housing (10), and clamping means (18, 19) seal the ends of the coupling. Fig. 1
    公开号:SE0950538A1
    申请号:SE0950538
    申请日:2009-07-08
    公开日:2011-01-09
    发明作者:Fredrik Svensson
    申请人:Kyla & Vaermesupport Fs Ab；
    IPC主号:
    专利说明:

    15 20 25 30 As a result, corrosion has been able to occur and also the mixing of air in the liquid system, which has a negative effect on the saving potential and the service life of the plant.
    According to a as yet unverified and unpublished theory, when condensing and starting, for example, heat pumps, condensation forms under coupling nuts with their clamping rings and connections, ice forming under the nuts, which causes the pressure from the formed ice to exceed the strength of the couplings. As a result, small cracks can occur, with visible or invisible leakage as a result.
    BRIEF SUMMARY OF THE INVENTION The object of the present invention is to provide both a method and a device which increase the service life of the coupling and a housing for use in the method and in the device.
    In the process specified in the first paragraph above, this object is achieved by enclosing the coupling in a housing e in accordance with the invention, and by bringing an anhydrous, hydrophobic sealing substance to cover the outside of the coupling.
    Correspondingly, said object is achieved in the device specified in the second paragraph above by an anhydrous, hydrophobic sealing substance covering the outside of the coupling and that the coupling with the sealing substance is enclosed in a housing.
    By covering the outside of the coupling with an anhydrous, hydrophobic sealing substance, condensation under the coupling nut with its clamping ring is prevented. Explosive ice formation and associated corrosion cannot occur, so that leakage is prevented, the coupling has an increased service life and the plant's saving potential and service life remain unchanged. By enclosing the coupling with the sealing substance in a casing, an unintentional removal of the sealing substance from the coupling is prevented.
    Suitably, a substantially tubular space formed between the outside of the coupling and the inside of the enclosing housing is at least substantially filled with the sealing substance. This ensures that there is no possibility of moisture in the surrounding atmosphere condensing on the coupling. It is also suitable that the sealing substance at least essentially consists of a gel. A gel has a purpose-adapted consistency, it is both easy to apply and does not tend to run away from the area on which it has been applied after application.
    Preferably, the gel consists of petroleum jelly, for which the trivial name Vaselin is usually used. Vaseline is a semi-solid mixture of hydrocarbons (microcrystalline waxes with generally more than 25 carbon atoms and minerals) and has a melting point of about 75 ° C.
    The liquid flowing in the line is suitably constituted by a cold or heat transfer medium in a heat pump plant, and this medium is preferably selected from a group consisting of brine solutions of bioethanol or glycol.
    Preferably, the cover consists of elastic material, preferably rubber, which facilitates assembly, and advantageously the seal is applied to the pipe by means of at least two clamping means, preferably claw rings, one located upstream and the other downstream of the coupling.
    In one embodiment, the above-mentioned object is achieved at the housing specified in the third paragraph above in that in accordance with the invention the housing has a long side provided with a longitudinal slot which allows the housing to be inserted over the coupling laterally to enclose the same. .
    By enclosing the coupling with the sealing substance in a housing, an unintentional removal of the sealing substance from the coupling is prevented, and the longitudinal slot enables a relatively simple mounting of the housing around the coupling.
    To facilitate assembly, the housing may have an additional longitudinal slot, so that the housing is two-part. The assembly is further facilitated if the slot is designed to form a snap joint or hook joint when the slot edges are joined together.
    The cover can consist of e.g. metal or plastic, but preferably consists of elastic material, preferably rubber. This makes it easy to design the wear edges to form snap joints. In an alternative embodiment, the above-mentioned object is achieved at the housing indicated in the third paragraph above by the fact that in accordance with the invention the casing is unleavened and so elastic that after being applied to a portion of the conduit in connection with the coupling can be extended sufficiently to be able to tilt over the coupling to enclose it.
    Furthermore, in both embodiments the housing is designed to seal against the line by means of at least two clamping means, preferably clamping rings, one located upstream and the other downstream of the coupling. In this way, the housing around the coupling is fixed, and any penetration of the sealing substance is minimized.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in more detail with reference to preferred embodiments and the accompanying drawings.
    Figure 1 is a side view partly in cross section of a pipeline provided with a splice coupling and enclosed in a housing e according to a first preferred embodiment of the invention.
    Figure 2 is a cross-sectional view of the cavity shown in Figure 1, which consists of plastic or rubber and has two longitudinal slots and male and female means arranged along the side edges of the slots for providing snap connections.
    Figure 3 is a cross-sectional view of a plastic or rubber housing having a single longitudinal slot and male and female members arranged along the side edges of the slot for providing a snap connection.
    Figure 4 is a cross-sectional view of a sheet metal housing having a single longitudinal slot and hooks arranged along the side edges of the slot to provide a hook joint.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 shows a conventional straight joint connection 1 of the clamping ring type for connecting two pipes 2 and 3 in a conduit intended to be flowed through by liquid at a lower temperature than the ambient. The temperature difference can normally cause water vapor to condense on the pipe and pipe connection, e.g. in heat pump systems and cooling distribution systems where parts of the pipe system have a lower operating temperature than 0 ° C, which causes such pipe connections to have a limited service life.
    According to the present invention, this problem is solved by enclosing the coupling 1 in a housing e 10, and by causing an anhydrous, hydrophobic sealing substance 20 to cover the outside of the coupling 1. In order to provide the desired protection for the coupling 1, it is important that the sealing substance 20 is anhydrous and hydrophobic. Even though the coupling 1 shown in Figure 1 is a straight joint coupling, it is understood easily and without inventive work how the principles of the invention can be applied to protect other couplings, e.g. angle couplings and T-couplings. One end of the coupling 1 can also be directly connected to a compressor or pump housing (not shown), the housing 10 suitably also enclosing the compressor and the pump, respectively.
    The coupling 1 does not form part of the present invention, and since the coupling 1 is moreover conventional and can be of various different types, it may be considered unnecessary to describe it in more detail.
    Between the outside of the coupling 1 and the inside of the connecting housing 10 a substantially tubular space 11 is formed, which in the embodiment shown in Figure 1 is at least substantially filled with the sealing substance 20. However, it is within the scope of the invention that the space is largely not filled with sealant. Namely, if desired, it is possible to apply the sealing substance 20 only around the pipes 2 and 3 where they enter the coupling 1 and where a threaded coupling nipple enters the threads on the coupling nut, and to then apply the housing around the coupling provided with sealing substance. 1 to protect the applied sealant 20 from involuntary injury. On the other hand, it is of course also possible to first apply the housing 10, which should then be relatively rigid, around the coupling 1 and then inject the sealing substance 20 into the space between the inside of the housing 10 and the outside of the coupling 1 while displacing the space enclosed in the space. the air. The housing 10 may be provided with a nipple (not shown) for injecting the sealant 20 and should then be relatively rigid, and the displaced air may escape through one or both of the ends of the housing 10 or through a slot or special air outlet.
    The sealing substance consists at least essentially of a gel 20. A gel has a consistency adapted to the purpose, it is both easy to apply and does not tend to run away from the area on which it has been applied after application. Preferably, the gel is petroleum jelly 20, for which the trivial name vaseline is usually used. Vaseline is a semi-solid mixture of hydrocarbons (microcrystalline waxes with generally more than 25 carbon atoms and minerals) and has a melting point of about 75 ° C. If desired, the gel may also contain additives to achieve certain desired properties.
    The liquid flowing through the pipes 2 and 3 is, as stated above, a cold or heat transfer medium in a heat pump plant or plant for transporting cold. The heat transfer medium is then usually selected from a group consisting of brine solutions of bioethanol or glycol. "Brine" is a general term for brine, ie. a liquid with a freezing point below 0 ° C. Water is usually used with an addition of salts, for example calcium chloride, or of organic compounds, such as glycols or alcohols.
    In the embodiment shown in Figures 1 and 3, the housing 10 has a long side provided with a longitudinal slot 12 (Figure 3), which allows the housing to be inserted over the coupling 1 laterally to enclose the same. If desired, the housing 10 may, as shown in Figure 2, have a further longitudinal slot 13, located on an opposite long side of the housing, so that the housing 10 is two-part, the two halves formed being identical.
    The housing is shown to have an annular cross-section, but if desired, the cross-section may alternatively have a different shape, e.g. hexagonal as a coupling nut to reduce the space 11 between the housing 10 and the coupling 1. In a housing for the straight joint coupling in Figure 1, however, the annular cross-section is preferred, since such a coupling has two coupling nuts which after tightening may have different orientations relative to each other.
    In the embodiment shown in Figures 1-3, the cover 10 further consists of oil-resistant rubber or plastic. As a result, the housing 10 automatically has a certain elasticity, which facilitates assembly. Furthermore, it is shown that the edges of each of the slots 12 and 13 are designed to form snap joints with male members 14 and female members 15 when pressed against each other. Other types of snap joints than those shown in Figures 2 and 3 are of course conceivable.
    Figure 4 shows a housing 10 which is a variant of that shown in Figure 3. Instead of consisting of rubber or plastic, the housing 10 in 4 gur 4 consists of sheet metal, and instead of the edges of the slot 12 being designed for to form a snap joint, they are formed in Figure 4 as hooks 16 to form a hook joint. After hooking together the hooks 16 formed along the wear edges, the tendency of the plate to re-spring is used to hold the hook joint together. Of course, other types of hook joints than those shown in Figure 4 can also be used.
    In an embodiment not shown, the edges of the slit or slits may be designed as fls, and conventional retainers hold the nss in pairs abutting each other to form förs.
    Alternatively, the housing 10 in an embodiment not shown is thin and uncleaved and so elastic that after being applied to a portion of the conduit 2 or 3 adjacent the coupling 1 it can be expanded sufficiently to be able to be tilted over the coupling 1 to enclose this. The housing 10 then suitably consists of oil-resistant rubber.
    After being placed around the coupling 1, the ends of the casing 10, which can also be called ends, are sealed against the pipes 2 and 3 or in an embodiment not shown against one of these pipes and against a component which is insignificant on the other side of the coupling 1, to which the connection is directly connected, e.g. a housing (not shown) for a compressor or pump. To keep the ends of the housing 10 in sealing abutment against the pipes or one pipe and for example the housing, at least two clamping means, suitably two clamping rings 18, 19 are applied around the ends of the housing, one located upstream and the other downstream of the coupling 1 .
    The clamping rings can be of the usual type and consist of plastic or also consist of conventional hose clamps.
    When the housing 10 consists of two halves, as shown in Figure 2, these can, if desired, be marketed partially filled with the sealing substance 20, which is held in place in the housing half by a suitable protection, e.g. and foil. Thus, when the two halves, after the protective foil or other protection has been removed, are applied around a coupling 1 and connected to each other by a suitable dressing, the sealing substance 20 will at least substantially fill the space 11 between the inside of the housing 10 and the outside of the coupling 1, while an excess of the sealant 20 is forced out of the housing 10.
    INDUSTRIAL APPLICATION In heat pump systems and systems for cold distribution, parts of the pipe system have a lower working temperature than 0 ° C, which causes pipe connections in the system to be exposed to condensation with accompanying ice formation, risk of cracking and corrosion caused by it and limited life. This problem is solved by the present invention by applying an anhydrous, hydrophobic sealant to the outside of the coupling and enclosing the coupling with the sealant in a housing e.
    权利要求:
    Claims (1)
    [1]
    1. 0 15 20 25 30 35 PATENT REQUIREMENTS. Method for increasing the service life of a pipe coupling (1) in a pipe (2, 3) intended for flowing liquid with a lower temperature than the ambient, whereby the temperature difference can cause water vapor to condense on the pipe (2, 3) and the pipe coupling (1), k characterized in that the coupling (1) is enclosed in a housing (10), and that an anhydrous, hydrophobic sealing substance (20) is caused to cover the outside of the coupling (1). . Method according to claim 1, characterized in that a substantially tubular space (11) formed between the outside of the coupling (1) and the inside of the enclosing housing (10) is at least substantially filled with the sealing substance (20). . Method according to claim 1 or 2, characterized in that the sealing substance (20) consists at least essentially of a gel. . Method according to claim 3, characterized in that the gel (20) consists of petroleum jelly. . Method according to any one of claims 1-4, characterized in that the liquid is a cold or heat transfer medium in a heat pump system. . Process according to claim 5, characterized in that the heat transfer medium is selected from a group consisting of brine solutions of bioethanol or glycol. . Method according to one of Claims 1 to 6, characterized in that the housing (10) consists of elastic material, preferably rubber. . Method according to one of Claims 1 to 7, characterized in that the housing (10) is arranged sealingly against the line (2, 3) by means of at least two clamping means, preferably clamping rings (18, 19), one located upstream and the other downstream of the clutch. . Device for increasing the service life of a pipe coupling (1) in a pipe (2, 3) intended for flowing liquid with a lower temperature than the ambient one, whereby the temperature difference can cause water vapor to condense on the pipe (2, 3) 10 15 20 25 30 35 10 11. 12. 13. 14. 15. 16. 17. 10 and the pipe coupling (1), characterized in that an anhydrous, hydrophobic sealing substance (20) covers the outside of the coupling (1) and that the coupling (1) with the sealing substance (20) ) is enclosed in a housing (10). Device according to claim 9, characterized in that a substantially tubular space (11) formed between the outside of the coupling (1) and the inside of the enclosing housing (10) is at least substantially filled with the sealing substance (20). Device according to claim 9 or 10, characterized in that the sealing substance (20) consists at least essentially of a gel. Device according to claim 1 1, characterized in that the gel (20) consists of petroleum jelly. Device according to one of Claims 10 to 12, characterized in that the liquid is a cold or heat transfer medium in a heat pump system. Device according to claim 13, characterized in that the heat transfer medium is selected from a group consisting of brine solutions of bioethanol or glycol. Device according to one of Claims 10 to 14, characterized in that the housing (10) consists of elastic material, preferably rubber. Device according to one of Claims 10 to 15, characterized in that the housing (10) is arranged sealingly against the pipe by means of at least two clamping means, preferably clamping rings (18, 19), one located upstream and the other downstream of the coupling (1). Housing for enclosing a pipe coupling (1) in a pipe (2, 3) intended for flowing liquid with a lower temperature than the ambient, whereby the temperature difference can cause water vapor to condense on the pipe (2, 3) and the pipe coupling (1), and an anhydrous , hydrophobic sealant (20) covering the outside of the coupling, characterized in that the casing (10) has a long side provided with a longitudinal slot (12) which allows the casing (10) to be inserted over the coupling (1) laterally for enclosing the same. Housing according to claim 17, characterized in that the housing (10) has a further longitudinal slot (13), located on an opposite long side of the housing. (10), so that the housing (10) is two-part. Housing according to claim 18, characterized in that the two parts of the housing (10) are partially filled with the sealing substance (20), which is held in place in each part of a temporary protection, intended to be removed before the application of the housing (10). around the coupling (1). Housing according to one of Claims 17 to 19, characterized in that the slit (12, 13) is designed to form a snap joint or hook joint when the slit edges are joined together. Housing according to one of Claims 17 to 20, characterized in that the housing (10) consists of elastic material, preferably rubber. Enclosure for enclosing a pipe coupling (1) in a conduit (2, 3) intended for flowing liquid with a lower temperature than the ambient, the temperature difference may cause water vapor to condense on the pipe (2, 3) and the pipe coupling (1), and a anhydrous, hydrophobic sealant (20) covering the outside of the coupling (20), characterized in that the housing (10) is unslotted and is so elastic that after being applied to a portion of the conduit (2, 3) in connection to the coupling (1) can be extended sufficiently to be able to tilt over the coupling (1) to enclose it. Housing according to one of Claims 17 to 22, characterized in that the housing (1) is designed to seal against the conduit (2, 3) by means of at least two clamping means, preferably clamping rings (18, 19), one located upstream and the other downstream of the clutch.
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    同族专利:
    公开号 | 公开日
    SE534446C2|2011-08-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2012-03-06| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0950538A|SE534446C2|2009-07-08|2009-07-08|Method and apparatus for increasing the service life of a pipe coupling and housing for use in the method and in the apparatus|SE0950538A| SE534446C2|2009-07-08|2009-07-08|Method and apparatus for increasing the service life of a pipe coupling and housing for use in the method and in the apparatus|
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