WO2019042269A1 - 密封连接结构、功能部件、热力膨胀阀及系统 - Google Patents

密封连接结构、功能部件、热力膨胀阀及系统 Download PDF

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Publication number
WO2019042269A1
WO2019042269A1 PCT/CN2018/102642 CN2018102642W WO2019042269A1 WO 2019042269 A1 WO2019042269 A1 WO 2019042269A1 CN 2018102642 W CN2018102642 W CN 2018102642W WO 2019042269 A1 WO2019042269 A1 WO 2019042269A1
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Prior art keywords
expansion valve
thermal expansion
groove
connecting member
face
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Ceased
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PCT/CN2018/102642
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English (en)
French (fr)
Inventor
吕瑞
刘敬喜
徐协斌
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Copeland Suzhou Co Ltd
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Emerson Climate Technologies Suzhou Co Ltd
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Publication date
Priority claimed from CN201710762161.8A external-priority patent/CN109424805A/zh
Priority claimed from CN201721086147.2U external-priority patent/CN207334017U/zh
Application filed by Emerson Climate Technologies Suzhou Co Ltd filed Critical Emerson Climate Technologies Suzhou Co Ltd
Publication of WO2019042269A1 publication Critical patent/WO2019042269A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall

Definitions

  • the present disclosure relates to a sealed connection structure, and in particular to a sealed connection structure employed between various components in a refrigeration system and respective piping.
  • thermal expansion valves as the main components in refrigeration systems, are widely used in various refrigeration conditions due to their compact structure and low cost.
  • the thermal expansion valve In the application process, the thermal expansion valve must meet the standards of safe use and reliable quality.
  • the sealing performance of the joint between the thermal expansion valve and the pipeline is the primary indicator for assessing the reliability of the quality.
  • the thermal expansion valve has been widely used in the refrigeration conditions in which vibration and impact exist.
  • the thermal expansion valve and the pipe connection part are subjected to alternating loads, and are often unbalanced. Therefore, higher sealing requirements are imposed on the sealing performance of the sealing faces of the contact portions of the two.
  • Another object of the present disclosure is to provide an improved sealed joint structure that is simple in construction, low in cost, and has good sealing performance.
  • a sealed connection structure comprising: a first connector having a first mating face; a second connector, the second connection The piece has a second mating surface, wherein the second mating face of the second connector and the first mating face of the first connector are configured to be in sealing contact such that the first connector Forming a sealing joint surface with the second connecting member; and an elastic seal configured to be fitted between the first mating face and the second mating face, thereby being at the first A flexible sealing structure is provided between the connector and the second connector.
  • At least one of the first mating face and the second mating face is provided with a groove, and the elastic seal is fitted in the groove.
  • the groove is formed perpendicular to the first mating face or the second mating face.
  • first mating face and the second mating face are both tapered faces.
  • the first mating surface is formed on one end surface of the first connecting member, and the second mating surface is formed on an end surface of the flared portion of the second connecting member; or The first mating surface is formed on an end surface of the flared portion of the first connecting member, and the second mating surface is formed on one end surface of the second connecting member.
  • the elastomeric seal is an O-ring seal.
  • the O-ring and the groove are configured such that in a state where the O-ring is pre-assembled in the groove, the O-ring does not The groove is peeled off.
  • At least a portion of the O-ring is blocked by at least a portion of the wall of the groove in a state in which the O-ring is pre-assembled in the groove.
  • the seal connection structure further includes a fastener configured to securely couple the first connector and the second connector to each other.
  • the fastener is a fitting that fits over the first connector and the second connector.
  • the first connecting member is an inlet pipe portion or an outlet pipe portion of a compressor, a heat exchanger, a thermal expansion valve, an electronic expansion valve, a liquid storage tank, a dryer, a sight glass, a shut-off valve, a four-way reversing valve;
  • the second connecting member is a connecting pipe connected to the inlet pipe portion or the outlet pipe portion.
  • a functional component for a fluid delivery conduit comprising: a first connector, the first connector being formed with an external thread and having at its end a tapered first mating surface having a groove formed on the first mating surface; an elastic seal disposed in the recess; and a pipe joint having a fit with the external thread a thread and a tapered third mating surface that mates with the first mating surface.
  • the elastomeric seal is an O-ring seal.
  • the functional component further includes a tubular member, the end of the tubular member having a flared portion, the flared portion forming a second surface capable of forming a face seal with the first mating face of the first connector Mating surface.
  • the functional component is selected from the group consisting of a compressor, a heat exchanger, a thermal expansion valve, an electronic expansion valve, a liquid storage tank, a dryer, a sight glass, a shut-off valve, a cross Directional valve.
  • a thermal expansion valve including: a valve body for regulating a fluid flow rate; a first connection member disposed on the valve body, the first connection a piece having a tapered first engaging surface at an end thereof, a groove formed on the first mating surface, and an elastic seal disposed in the groove.
  • the thermal expansion valve further includes a pipe joint having an internal thread that cooperates with an external thread formed on the first connecting member and a taper that cooperates with the first mating surface The third mating surface.
  • a refrigeration/heating system comprising a sealed connection structure as described above or a functional component as described above or a thermal expansion valve as described above.
  • a fluid delivery system comprising a sealed connection structure as described above or a functional component as described above or a thermal expansion valve as described above.
  • the sealing structure according to the present disclosure has a simple sealing structure and a compact design, and can effectively solve the sealing problem of the connecting member under the condition of receiving an alternating load.
  • the use of the elastic seal has the advantages of low cost and convenient application, and the cost increase of the entire system is small, which is beneficial to the improvement of the existing design.
  • the anti-drop structure is designed to prevent the O-ring from falling off from the relevant parts in the natural state, which increases the convenience of the user and improves the assembly convenience.
  • FIG. 1 is a schematic view showing a connection state of a thermal expansion valve and an associated connecting pipe according to an example embodiment
  • Figure 2 is a cross-sectional view showing the connecting portion of the thermal expansion valve and the connecting pipe shown in Figure 1;
  • FIG. 3 illustrates a partial cross-sectional schematic view of a sealed connection structure of a thermal expansion valve and a connecting pipe according to an example embodiment of the present disclosure
  • Figure 4 is a partial cross-sectional view showing the outlet tube portion of the thermal expansion valve shown in Figure 3, wherein the O-ring is pre-fitted in a recess in the outlet tube portion.
  • the sealed connection structure according to the present disclosure will be described in detail by taking a thermal expansion valve application and a connecting pipe connected thereto as an example.
  • the seal connection structure according to the present disclosure is not limited by the application of the thermal expansion valve, but can be applied to any possible structure and application in which a sealing connection is required between components that need to cooperate with each other, for example, various types in a refrigeration system.
  • Functional components such as compressors, heat exchangers (eg condensers, evaporators), electronic expansion valves, reservoirs, dryers, sight glass, globe valves, four-way reversing valves, etc. Connections between valve members or other functional components and fittings in other gas or liquid delivery lines.
  • the sealing joint structure according to the present disclosure will be described by taking a sealing fit between the outlet pipe portion of the thermal expansion valve and the associated connecting pipe as an example. That is, the outlet pipe portion of the thermal expansion valve is taken as an example of the first connection member that needs to be sealingly engaged with each other, and the connection pipe connected to the thermal expansion valve is taken as an example of the second connection member.
  • the seal connection structure according to the present disclosure is also not limited by the outlet pipe portion of the thermal expansion valve and the associated connecting pipe, but may be applied between any components or structures that need to be mated with each other, for example, for thermal expansion. Between the inlet pipe portion of the valve and its corresponding connecting pipe.
  • FIG. 1 and 2 are respectively a schematic view and a partial cross-sectional view showing a connection state of a thermal expansion valve and an associated connecting pipe according to an example embodiment.
  • a connecting pipe (as a second connecting member according to the present disclosure) 2 may be connected at an outlet pipe portion of the thermal expansion valve V (as a first connecting member according to the present disclosure) 1.
  • the outlet pipe portion 1 is coupled in fluid communication with the connecting pipe 2 such that fluid (eg, refrigerant) flowing from the thermal expansion valve V can be supplied through the connecting pipe 2 to a component located downstream of the thermal expansion valve V (eg, ,Evaporator).
  • the outlet pipe portion 1 of the thermal expansion valve V can be detachably connected to the connecting pipe 2 for replacement and maintenance. Due to the needs of the system operation, a sealing fit is required between the outlet pipe portion 1 and the connecting pipe 2 to contribute to the stability and reliability of the system operation.
  • Fig. 2 is a schematic cross-sectional view showing a connecting portion of the outlet pipe portion 1 and the connecting pipe 2 of the thermal expansion valve V shown in Fig. 1.
  • the outlet pipe portion 1 of the thermal expansion valve V and the connecting pipe 2 are in surface contact.
  • the outlet pipe portion 1 has a structure of a substantially circular pipe.
  • the connecting tube 2 has a body portion 21 of a substantially circular tube and a flared portion 22 at one end of the body portion 21.
  • the flared portion 22 abuts at the free end of the outlet pipe portion 1 so as to pass through the end face (as the first mating face) 11 at the free end of the outlet pipe portion 1 and the end face 23 of the flared portion 22 of the connecting pipe 2 ( As a second mating surface, a sealing joint surface between the outlet pipe portion 1 and the connecting pipe 2 is formed.
  • the two can be tightly joined together by fasteners that are fitted over the outlet tube portion 1 and the connecting tube 2.
  • an exemplary pipe joint is shown in Figures 1-4 of the present disclosure.
  • the pipe joint can be fitted from the end of the connecting pipe 2 opposite to the flared portion 22 to the flared portion 2 of the outlet pipe portion 1 and the connecting pipe 2, and the outlet pipe portion is realized by threading engagement with the outlet pipe portion 1.
  • 1 is a tight connection with the connecting pipe 2.
  • other structures can be used to tightly connect the outlet pipe portion 1 and the connecting pipe 2 together, for example, at the free end of the outlet pipe portion 1 and the flare of the connecting pipe 2.
  • a flange structure is provided at the portion 2, and the two flange structures are connected together by an additional bolt structure.
  • a screw-connectable connection can be provided at the free end of the outlet pipe portion 1 and at the flared portion 2 of the connection pipe 2, respectively, to achieve a secure connection between the two. Therefore, the present connection does not impose excessive restrictions on other connection structures between the outlet pipe portion 1 and the connection pipe 2.
  • a flared portion may be formed at the free end portion of the outlet pipe portion 1, and one end of the connecting pipe 2 directly abuts against the flared portion of the outlet pipe portion. The two are then securely connected to each other by additional fasteners.
  • the end face 11 of the free end of the outlet pipe portion 1 is a tapered end face at an oblique angle (e.g., 45 degrees) with respect to the horizontal plane.
  • the end face 23 of the flared portion 22 of the connecting tube 2 is also a tapered end face.
  • the end face 11 of the outlet pipe portion 1 and the end face 23 of the flared pipe 22 are configured to be sealingly engageable with each other (for example, under the fastening action of the aforementioned pipe joint 3) so that the outlet pipe portion 1 and the flared pipe 2 A sealing joint is formed between (and further between the thermal expansion valve V and the connecting pipe 2).
  • the sealing joint is formed on two relatively relatively rigid components, for example, the outlet tube portion 1 and the flare tube 2 may both be of a metallic material. Therefore, the sealing structure formed directly from the end surface 11 of the outlet pipe portion 1 and the end surface 23 of the flared pipe 22 can be referred to as a hard seal structure.
  • end face 11 of the outlet tube portion 1 and the end face 23 of the flare tube 22 may be suitably processed so that the two can be sealingly joined together.
  • the inventors have recognized that the aforementioned sealing joint surface may have problems in the presence of unstable loads such as vibration, impact, and the like. Specifically, when the thermal expansion valve V is applied to an unstable load subjected to vibration, shock, or the like, the system is unbalanced during operation. Therefore, the aforementioned sealing joint surface may be worn by an unbalanced force. With the extension of the use time of the thermal expansion valve, the sealing performance of the aforementioned sealing joint surface is also prone to a leaky seal such as leakage, thereby reducing the reliability of the seal and even causing leakage of the system.
  • the inventors have also considered that in order to achieve a good sealing effect for the mating faces of the two connecting members (i.e., the end faces 11 of the outlet pipe portion 1 and the end faces 23 of the flared tubes 22), it is necessary to ensure two mating faces.
  • the surface quality of the end face 11 and the end face 23 is good, and thus the aforementioned seal joint structure inevitably increases the difficulty and cost of component processing.
  • an improved sealing joint structure by adding an elastic seal (for example, an O-shape) between the outlet pipe portion 1 of the thermal expansion valve V and the flared portion 22 of the connecting pipe 2.
  • the sealing ring is such that the mating surface between the outlet pipe portion 1 and the flared portion 22 of the connecting pipe 2 is changed from the original integral hard seal to a double seal combination mainly composed of a flexible seal and a hard seal. It has been found through experiments that the structure of such a double seal combination can significantly improve the sealing performance of the thermal expansion valve.
  • This improved sealing joint structure will be further described in detail below in conjunction with FIGS. 3 and 4.
  • FIG. 3 is a partial cross-sectional view showing a sealed connection portion of a thermal expansion valve and a connecting pipe according to an example embodiment of the present disclosure.
  • Fig. 4 is a partial cross-sectional view showing the outlet pipe portion of the thermal expansion valve shown in Fig. 3.
  • an O-ring 4 can be used as an elastic seal disposed between the end face 11 of the outlet pipe portion 1 and the end face 23 of the flared pipe 22 for addition between the two end faces 11 and 23.
  • the flexible sealing structure thus achieves the effect of double sealing.
  • a groove 5 may be provided on at least one of the end surface 11 of the outlet pipe portion 1 and the end surface 23 of the flared pipe 22, and the O-ring 4 is fitted in the concave In slot 5.
  • a tapered end face 11 and a tapered end face 23 are formed between the tapered end face 11 and the tapered end face 23.
  • the hard seal structure and the double seal structure of the flexible seal structure formed by the O-ring 4 are used.
  • the O-ring 4 is an extrusion type seal
  • good sealing performance can be achieved by virtue of the elastic deformation ability of the seal itself.
  • the thermal expansion valve can meet the application needs of refrigerants with different temperatures and pressures.
  • the elastic characteristics of the elastic seal itself the greater the pressure of the medium in the elastic range, the better the sealing effect that the elastic seal can achieve. Therefore, this structural arrangement greatly enhances the sealing performance of the sealed joint structure.
  • the groove 5 may be formed only on the end face 11 of the outlet pipe portion 1 of the thermal expansion valve V.
  • the groove 5 may be formed only on the end face 23 of the flared portion 21 of the connecting tube 2.
  • the groove 5 may be formed to be recessed perpendicular to the end face 11 and/or the end face 23.
  • Such a structural arrangement is particularly advantageous in the case where both end faces 11 and 23 are tapered end faces, which is particularly advantageous for increasing the contact area between the O-ring 4 and the corresponding end face 11 or 23, which is advantageous for enhancing the effect of the flexible seal.
  • the groove 5 and the O-ring 4 may be configured such that when the O-ring 4 is pre-fitted in the groove 4 (ie, as shown in FIG. 4 in the O-ring 4 in advance) The O-ring 4 does not fall out of the groove 5 when it is fitted in the groove 5 but is not compressed and is in a natural state. This facilitates the convenience in assembly and enhances the convenience of the user.
  • the size of the O-ring 4 and the groove 5 may be selected such that at least a portion of the O-ring 4 (for example, inside the O-ring) in the above-described pre-assembled state of the O-ring 4
  • the loop portion 41 is blocked by at least a portion of the wall of the recess 5 (for example, a wall portion closer to the central axis of the first connector 1 in Fig. 4) 51. In this way, it can be ensured that the O-ring 4 does not detach from the thermal expansion valve V in the natural state.
  • the groove 5 has a square cross section.
  • the groove 5 may also have a V-shaped, circular or other irregular cross-sectional form depending on the actual application.
  • the extent to which the recess 5 extends over the end face 11 and/or the end face 23 may be set depending on the sealing requirements in the actual application or the desired sealing effect.
  • the groove 5 can be extended over a wide range on the end face 11 and/or the end face 23 to increase the effect of the flexible seal between the end face 11 and the end face 23,
  • the elastic seal can have a large width.
  • the concept of the double seal of the sealed connection structure according to the present disclosure is not limited by the application between the thermal expansion valve and the connection pipe.
  • the first connector and the second connector that are sealingly fitted to each other can have a variety of different configurations.
  • the first mating face of the first connecting member and the second mating face of the second connecting member are not limited to a taper, but may take any feasible form.
  • a functional component for a fluid delivery conduit such as the compressor, heat exchanger (e.g., condenser, evaporator), electronic expansion valve, storage Liquid tank, dryer, sight glass, globe valve, four-way reversing valve, etc.
  • the functional component comprises a first connector. Similar to the structure described above in connection with the outlet pipe portion 1, an external thread (portion indicated by 12 in FIGS. 3-4) may be formed on the first connector and at one end thereof (ie, to be One end of the connection of the external connecting tube or the like has a tapered first mating surface (portion indicated by 11 in FIGS. 3 to 4), wherein a groove is formed on the first mating surface (as shown in FIG.
  • the functional component further includes an elastic seal (such as the O-ring 4 in FIGS. 3 and 4) and a pipe joint (such as the structure shown by 3 in FIG. 3) disposed in the groove.
  • the pipe joint has an internal thread (portion indicated by 31 in FIG. 3) that cooperates with an external thread on the first connecting member, and a tapered third mating surface that cooperates with the first mating surface ( As indicated by 32 in Figure 3).
  • a thermal expansion valve may include a valve body for regulating fluid flow.
  • a first connecting member is disposed on the valve body. Similar to the structure described above, one end of the first connecting member has a tapered first mating face, and a groove is formed on the first mating face.
  • the thermal expansion valve may also include an elastomeric seal (eg, an O-ring) disposed in the recess.
  • the thermal expansion valve may further include a pipe joint, and the pipe joint may be provided with an internal thread that cooperates with an external thread formed on the first connecting member and a tapered shape that cooperates with the first mating surface
  • the third mating surface (such as face 32 in Figure 3).
  • the pipe joint can be pre-assembled on the first connecting piece by screwing.
  • a refrigeration/heating system comprises a sealed connection structure as described above, or a functional component as described above or a thermal expansion valve as described above.
  • a fluid delivery system comprising a sealed connection structure as described above or a functional component as described above or a thermal expansion valve as described above.
  • the sealing portion of the sealing joint structure has a simple structure and a compact design, and can effectively solve the sealing problem of the connecting member under the condition of being subjected to an alternating load.
  • the use of the elastic seal has the advantages of low cost and convenient application, the cost increase of the entire system is small, and it is advantageous to improve the existing design.
  • the self-sealing effect of the elastic seal itself the greater the medium pressure in the elastic range, the better the sealing effect that can be achieved.
  • the anti-drop structure is designed to prevent the O-ring from falling out of the thermal expansion valve in a natural state, which increases user convenience.

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Abstract

提供了一种密封连接结构，密封连接结构包括：具有第一配合面的第一连接件（1），具有第二配合面的第二连接件（2）以及弹性密封件。其中，第一配合面与第二配合面构造成能够密封地接触从而在第一连接件和第二连接件之间形成密封接合面，弹性密封件构造成装配在第一配合面与第二配合面之间，从而在第一连接件与第二连接件之间提供柔性密封结构。还提供了一种用于流体输送管路的功能部件、一种热力膨胀阀、一种制冷/制热系统以及一种流体输送系统。

Description

密封连接结构、功能部件、热力膨胀阀及系统
本申请要求于2017年8月28日提交中国专利局、申请号为201710762161.8、发明名称为“密封连接结构、功能部件、热力膨胀阀及系统”的中国专利申请以及于2017年8月28日提交中国专利局、申请号为201721086147.2、发明名称为“密封连接结构、功能部件、热力膨胀阀及系统”的中国专利申请的优先权，上述两件申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及一种密封连接结构，特别地，涉及制冷系统中的各种部件与相应的管路之间采用的密封连接结构。
背景技术
本部分的内容仅提供了与本公开相关的背景信息，其可能并不构成现有技术。
在诸如通风、空调、制冷等应用领域中，系统的部件与部件之间通常需要进行密封连接，以确保系统的稳定和高效运行。例如，热力膨胀阀作为制冷系统中的主要部件，因其结构紧凑、成本较低而广泛应用于各类制冷工况中。在应用过程中，热力膨胀阀必须满足使用安全以及质量可靠的标准。热力膨胀阀与管路连接处的密封性能是考核其质量是否可靠的首要指标。
近年来，随着制造水平的提高，热力膨胀阀已经大量应用于存在振动、冲击的制冷工况中。在这些工况中，热力膨胀阀与管路连接部分承受交变载荷，往往受力不平衡。因而对两者接触部分的密封面的密封性能提出了更高的要求。
因此，如何对热力膨胀阀与管路的连接结构进行适当的设计，使其满足应用中所需的密封要求，成为影响热力膨胀阀的质量的重要因素。
发明内容
本公开的一个目的是提供一种密封连接结构，以改善彼此连接的两个 部件之间的密封性能。
本公开的另一个目的是提供一种改进的密封连接结构，所述密封连接结构结构简单、成本较低、并且密封性能较好。
本公开的又一个目的是提供一种应用于热力膨胀阀与相关联的连接管的密封连接结构，以改善热力膨胀阀的密封性能。
根据本公开的一个方面，其提供了一种密封连接结构，所述密封连接结构包括：第一连接件，所述第一连接件具有第一配合面；第二连接件，所述第二连接件具有第二配合面，其中，所述第二连接件的所述第二配合面和所述第一连接件的所述第一配合面构造成能够密封地接触从而在所述第一连接件和所述第二连接件之间形成密封接合面；以及弹性密封件，所述弹性密封件构造成装配在所述第一配合面与所述第二配合面之间，从而在所述第一连接件与所述第二连接件之间提供柔性密封结构。
在一个实施方式中，所述第一配合面和所述第二配合面中的至少一者上设置有凹槽，并且，所述弹性密封件装配在所述凹槽中。
在一个实施方式中，所述凹槽垂直于所述第一配合面或所述第二配合面凹陷而形成。
在一个实施方式中，所述第一配合面和所述第二配合面均为锥形面。
在一个实施方式中，所述第一配合面形成在所述第一连接件的一个端面上，所述第二配合面形成在所述第二连接件的扩口部的端面上；或者所述第一配合面形成在所述第一连接件的扩口部的端面上，所述第二配合面形成在所述第二连接件的一个端面上。
在一个实施方式中，所述弹性密封件为O型密封圈。
在一个实施方式中，所述O型密封圈和所述凹槽配置成使得在所述O型密封圈预装配在所述凹槽中的状态下，所述O型密封圈不会从所述凹槽脱落。
在一个实施方式中，在所述O型密封圈被预装配在所述凹槽中的状态下，所述O型密封圈的至少一部分被所述凹槽的壁的至少一部分阻挡。
在一个实施方式中，所述密封连接结构还包括构造成将所述第一连接件和所述第二连接件彼此紧固地连接的紧固件。
在一个实施方式中，所述紧固件为套装在所述第一连接件和所述第二连接 件外部的管接头。
在一个实施方式中，所述第一连接件为以下部件的进口管部分或出口管部分：压缩机、热交换器、热力膨胀阀、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀；所述第二连接件为连接至所述进口管部分或出口管部分的连接管。
根据本公开的另一个方面，提供了一种用于流体输送管路的功能部件，所述功能部件包括：第一连接件，所述第一连接件上形成有外螺纹并且在其端部具有锥形的第一配合面，在所述第一配合面上形成有凹槽；设置在所述凹槽中的弹性密封件；以及管接头，所述管接头具有与所述外螺纹配合的内螺纹以及与所述第一配合面配合的锥形的第三配合面。
在一个实施方式中，所述弹性密封件为O型密封圈。
在一个实施方式中，所述功能部件还包括管件，所述管件的端部具有扩口部，所述扩口部形成能够与所述第一连接件的第一配合面形成面密封的第二配合面。
在一个实施方式中，所述功能部件选自由下述部件构成的组：压缩机、热交换器、热力膨胀阀、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀。
根据本公开的另一个方面，提供了一种热力膨胀阀，所述热力膨胀阀包括：用于调节流体流量的阀体；设置在所述阀体上的第一连接件，所述第一连接件在其端部具有锥形的第一配合面，在所述第一配合面上形成有凹槽；以及设置在所述凹槽中的弹性密封件。
在一个实施方式中，所述热力膨胀阀还包括管接头，所述管接头具有与形成在所述第一连接件上的外螺纹配合的内螺纹以及与所述第一配合面配合的锥形的第三配合面。
根据本公开的再一个方面，提供了一种制冷/制热系统，所述制冷/制热系统包括如上所述的密封连接结构或者如上所述的功能部件或者如上所述的热力膨胀阀。
根据本公开的又一个方面，提供了一种流体输送系统，所述流体输送系统包括如上所述的密封连接结构或者如上所述的功能部件或者如上所述的热力 膨胀阀。
根据本公开的密封连接结构的密封结构简单，设计紧凑，能有效地解决连接件在承受交变载荷的情况下的密封问题。而且，弹性密封件的使用具有成本低、应用便利的优势，整个系统的成本增加幅度很小，有利于对现有设计进行改进。另外，弹性密封件自身所具有的自密封效果，在其弹性范围内，介质压力越大，能实现的密封效果越好。此外，防脱落结构设计能够防止在O型密封圈的自然状态下从相关部件上脱落，增加了用户使用的便利性并且提高了装配的便利性。
附图说明
通过以下参照附图的描述，本公开的一个或几个实施方式的特征和优点将变得更加容易理解。这里所描述的附图仅是出于说明目的而非意图以任何方式限制本公开的范围，附图并非按比例绘制，并且一些特征可能被放大或缩小以显示特定部件的细节。在附图中：
图1示出了根据示例实施方式的热力膨胀阀与相关连接管的连接状态示意图；
图2示出了图1所示的热力膨胀阀与连接管的连接部分的剖视示意图；
图3示出了根据本公开的示例实施方式的热力膨胀阀与连接管的密封连接结构的局部剖面示意图；以及
图4示出了图3所示的热力膨胀阀的出口管部分的局部剖面示意图，其中，O型密封圈预装配在出口管部分上的凹槽中。
具体实施方式
下面对本公开各实施方式的描述仅仅是示例性的，而绝不是对本公开及其应用或用法的限制。在各个附图中，采用相同的附图标记来标示相同的部件，因此相同部件的构造将不做重复描述。
在下文中，以热力膨胀阀应用及与之连接的连接管为例对根据本公开的密封连接结构做了详细的描述。然而，根据本公开的密封连接结构不以热力膨胀阀应用为限制，而是可以应用于需要彼此配合的部件之间进行密封连接的任何 可能的结构和应用中，例如，制冷系统中的各种功能部件如压缩机、热交换器(如冷凝器、蒸发器)、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀等与管件之间的连接，以及其他气体或液体输送管路中阀件或其他功能部件与管件之间的连接等。
此外，为便于描述，在本公开中，以热力膨胀阀的出口管部分与相关的连接管之间的密封配合为例对根据本公开的密封连接结构进行描述。也就是说，以热力膨胀阀的出口管部分作为需要彼此密封地接合的第一连接件的示例，以与热力膨胀阀连接的连接管作为第二连接件的示例。而且，根据本公开的密封连接结构也不以热力膨胀阀的出口管部分与相关的连接管为限制，而是可以应用于需要彼此配合的任何部件或结构之间，例如，可以用于热力膨胀阀的进口管部分与其相应的连接管之间。
图1和图2分别示出了根据示例实施方式的热力膨胀阀与相关连接管的连接状态示意图和局部剖视示意图。如图1所示，在热力膨胀阀V的出口管部分(作为根据本公开的第一连接件)1处可以连接有连接管(作为根据本公开的第二连接件)2。出口管部分1与连接管2以流体连通的方式接合在一起，从而使得自热力膨胀阀V流出的流体(例如，制冷剂)能够通过连接管2提供至位于热力膨胀阀V下游的部件(例如，蒸发器)。热力膨胀阀V的出口管部分1可以与连接管2以可拆卸的方式连接以便于更换和维修。由于系统运行的需要，出口管部分1与连接管2之间需要进行密封配合，以有助于系统运行的稳定性和可靠性。
图2示出了图1所示的热力膨胀阀V的出口管部分1与连接管2的连接部分的剖视示意图。如图2所示，热力膨胀阀V的出口管部分1与连接管2之间呈面接触的状态。具体地，如图2中所示，出口管部分1具有大致圆形管的结构。连接管2具有大致圆形管的本体部21以及位于本体部21的一端处的扩口部22。该扩口部22抵接在出口管部分1的自由端处，从而通过出口管部分1的自由端处的端面(作为第一配合面)11与连接管2的扩口部22的端面23(作为第二配合面)形成出口管部分1与连接管2之间的密封接合面。在实际应用中，可以通过套装在出口管部分1与连接管2上的紧固件将二者紧密地连接在一起。例如，在本公开的图1-图4中示出了示例性的管接头。该管接头 可以自连接管2的与扩口部22相反的端部套装到出口管部分1和连接管2的扩口部2上，并通过与出口管部分1的螺纹接合来实现出口管部分1与连接管2之间的紧密连接。可以理解的是，根据实际应用情况，也可以采用其它的结构将出口管部分1与连接管2紧密地连接在一起，例如，可以在出口管部分1的自由端处以及连接管2的扩口部2处设置法兰结构，并通过另外的螺栓结构将两个法兰结构连接在一起。可选地，还可以在出口管部分1的自由端处以及连接管2的扩口部2处分别设置能够螺纹连接的连接件来实现二者的紧固连接。因此，本公开中不对出口管部分1与连接管2之间的其它连接结构做过多的限制。
可选地，在未图示的实施方式中，也可以在出口管部分1的自由端部分形成扩口部，而连接管2的一端直接与出口管部分的扩口部抵接配合。然后通过另外的紧固件将二者彼此紧固地连接。
参照图2中的A所指示的部分可以看到，出口管部分1的自由端的端面11为相对于水平面成一定斜角(例如，45度)的锥形端面。同时，连接管2的扩口部22的端面23也是锥形端面。出口管部分1的端面11与扩口管22的端面23被构造成可以(例如，在前述的管接头3的紧固作用下)彼此密封地接合，从而在出口管部分1与扩口管2之间(进而在热力膨胀阀V与连接管2之间)形成密封接合面。可以理解的是，此种密封接合面形成在两个相对比较刚性的部件上，例如，出口管部分1和扩口管2可以均为金属材料。因此，可以将由出口管部分1的端面11与扩口管22的端面23直接形成的密封结构称为硬密封结构。
可以理解的是，可以对出口管部分1的端面11与扩口管22的端面23进行适当的加工处理，以便二者能够密封地接合在一起。
然而，本发明人意识到，前述的密封接合面在存在振动、冲击等不稳定载荷的工况下可能存在问题。具体地，当将热力膨胀阀V应用于承受振动、冲击等不稳定的载荷的工况下，系统在运行过程中受力不平衡。因此，前述的密封接合面在不均衡的力的作用下可能产生磨损。随着热力膨胀阀使用时间的延长，前述密封接合面的密封性能也容易出现泄漏等密封不严的情况，从而降低密封的可靠性，甚至导致系统的泄漏。此外，本发明人还考虑到，为了使得两 个连接件的配合面(即，出口管部分1的端面11与扩口管22的端面23)能实现良好的密封效果，需要保证两个配合面(即，端面11和端面23)的表面质量很好，因此前述的密封连接结构也不可避免地增加了部件加工的难度和成本。
为此，本发明人提出了一种改进的密封连接结构，其通过巧妙地在热力膨胀阀V的出口管部分1与连接管2的扩口部22之间增加弹性密封件(例如，O型密封圈)，使出口管部分1与连接管2的扩口部22之间的配合面由原来的整体硬密封变为柔性密封为主、硬密封为辅的双重密封组合。经过试验发现，此种双密封组合的结构能够显著地提升热力膨胀阀的密封性能。下面就结合图3和图4对此种改进的密封连接结构做进一步详细的说明。
此处需要说明的是，在下面的描述中，对于前面结合图1和图2所描述的出口管部分1和连接管2的结构相同的结构部分将不做过多重复的描述。下面将主要对图3和图4所示的密封连接结构相对于图1和图2所示的密封连接结构做出进一步改进的部分进行说明。
图3示出了根据本公开的示例实施方式的热力膨胀阀与连接管的密封连接部分的局部剖面示意图。图4示出了图3所示的热力膨胀阀的出口管部分的局部剖面示意图。
如图3所示，可以采用O型密封圈4作为布置在出口管部分1的端面11与扩口管22的端面23之间的弹性密封件，用以在两个端面11与23之间增加柔性密封结构，由此实现双重密封的效果。
具体地，结合图3和图4所示，可以在出口管部分1的端面11与扩口管22的端面23中的至少一者上设置凹槽5，并将O型密封圈4装配在凹槽5中。这样一来，当例如通过管接头3将出口管部分1与连接管2紧固在一起时，在锥形端面11与锥形端面23之间形成有由锥形端面11与锥形端面23形成的硬密封结构以及借助O型密封圈4形成的柔性密封结构的双重密封结构。
如此，由于O型密封圈4是一种挤压型密封件，依靠密封件自身的弹性变形能力可以实现良好的密封性能。特别是在应用于载荷不稳定的交变工况的情况下，O型密封圈和凹槽的配合结构能保证良好的密封性能。而且，根据所采用的O型密封圈的材质的不同，热力膨胀阀可以满足不同温度和压力的制 冷剂的应用需要。此外，可以理解的是，由于弹性密封件自身的弹性特点，在其弹性范围内，介质的压力越大，弹性密封件能实现的密封效果也越好。因此，此种结构布置极大地提升了密封连接结构的密封性能。
可选地，如图4所示，凹槽5可以只形成在热力膨胀阀V的出口管部分1的端面11上。替代性地，在未图示的实施方式中，凹槽5也可以仅形成在连接管2的扩口部21的端面23上。根据实际应用的需要，还可以在两个连接件(例如，出口管部分1和连接管2)上均设置凹槽结构，并且，在每个连接件上的凹槽的数量也可以变化。
优选地，凹槽5可以垂直于端面11和/或端面23凹陷而形成。此种结构布置在端面11和23均为锥形端面的情况下特别有利于增大O型密封圈4与相对应的端面11或23之间的接触面积，有利于增强柔性密封的效果。
可选地，可以将凹槽5和O型密封圈4配置成使得在将O型密封圈4预装配在凹槽4中时(即，如图4所示的在O型密封圈4预先装配在凹槽5中但还未被压缩而处于自然状态的情况下)，O型密封圈4不会从凹槽5中脱落出去。由此有利于装配中的便利，可以增强用户使用的便利性。
具体地，可以将O型密封圈4和凹槽5的尺寸选择成使得在O型密封圈4的上述预装配状态下，O型密封圈4的至少一部分(例如，O型密封圈的内圈部分)41被凹槽5的壁的至少一部分(例如，图4中更靠近于第一连接件1的中心轴线的壁部分)51阻挡。如此，可以确保在O型密封圈4的自然状态下，其不会从热力膨胀阀V上脱离。
在如图3和图4所示的示例中，凹槽5具有方形截面。可选地，根据实际应用的情况，凹槽5也可以具有V形、圆形或者其它不规则的截面形式。
可以理解的是，凹槽5在端面11和/或端面23上延伸的范围可以根据实际应用中的密封要求或者期望达到的密封效果来设置。例如，在存在较大的振动或冲击的工况下，可以使凹槽5在端面11和/或端面23上大范围地延伸，以增大端面11和端面23之间的柔性密封的效果，在这种情况下，弹性密封件可以具有较大的宽度。
此外，如前面提到的，根据本公开的密封连接结构的双重密封的概念不以热力膨胀阀与连接管之间的连接为应用限制。根据实际情况，彼此密封地配合 的第一连接件和第二连接件可以具有多种不同的结构形式。并且，第一连接件的第一配合面以及第二连接件的第二配合面也不以锥形为限，而是可以采用任何可行的形式。
在根据本公开的另一个方面提供了一种用于流体输送管路的功能部件，该功能部件例如上面提到的压缩机、热交换器(如冷凝器、蒸发器)、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀等。其中，该功能部件包括第一连接件。与上面结合出口管部分1所描述的结构类似，在该第一连接件上可以形成有外螺纹(如图3-图4中的12所标示的部分)并且在其一个端部(即待与外部的连接管等连接的一端)具有锥形的第一配合面(如图3-图4中的11所标示的部分)，其中，在所述第一配合面上形成有凹槽(如图3和图4中的环形凹槽5)。该功能部件还包括设置在所述凹槽中的弹性密封件(如图3和图4中的O型密封圈4)以及管接头(如图3中的3所表示的结构)。其中，所述管接头具有与第一连接件上的外螺纹配合的内螺纹(如图3中的31所标示的部分)以及与所述第一配合面配合的锥形的第三配合面(如图3中的32所指示的部分)。由此，由于可以借助螺纹配合将管接头与第一连接件预装配在一起，并且弹性密封件也可以预装配在凹槽中，有利于运输和组装。当需要将功能部件与待连接的连接管等连接时，只需要将管接头从第一连接件上拆卸下来，然后例如通过对待连接的连接管的一端进行扩口加工使其具有与第一配合面密封接触的锥形第二配合面，便可以简单地将功能部件与连接管密封地连接在一起。之后再将管接头套装在两个部件上，从而可以将两个部件紧固地连接在一起。
在根据本公开的另一个方面中，提供了一种热力膨胀阀。该热力膨胀阀可以包括用于调节流体流量的阀体。在所述阀体上设置有第一连接件。类似于上面所描述的结构，所述第一连接件的一个端部具有锥形的第一配合面，并且在所述第一配合面上形成有凹槽。此外，该热力膨胀阀还可以包括设置在所述凹槽中的弹性密封件(例如O型密封圈)。
可选地，该热力膨胀阀还可以包括管接头，该管接头可以设置有与形成在所述第一连接件上的外螺纹配合的内螺纹以及与所述第一配合面配合的锥形的第三配合面(如图3中的面32)。从而可以通过螺纹连接将管接头预装配在 第一连接件上。
在根据本公开的再一个方面中，还提供了一种制冷/制热系统。该制冷/制热系统包括如上所述的密封连接结构、或者如上所述的功能部件或者如上所述的热力膨胀阀。
在根据本公开的再一个方面中，还提供了一种流体输送系统，该流体输送系统包括如上所述的密封连接结构或者如上所述的功能部件或者如上所述的热力膨胀阀。
如上所示，根据本公开的密封连接结构的密封部位结构简单，设计紧凑，能有效地解决连接件在承受交变载荷的情况下的密封问题。而且，弹性密封件的使用具有成本低、应用便利的优势，整个系统的成本增加幅度很小，而且有利于对现有设计进行改进。另外，由于弹性密封件自身所具有的自密封效果，在其弹性范围内，介质压力越大，能实现的密封效果越好。此外，防脱落结构设计能够防止在O型密封圈的自然状态下从热力膨胀阀脱落，增加了用户的使用便利性。
尽管在此已详细描述了本公开的多种实施方式，但是应该理解，本公开并不局限于这里详细描述和示出的具体实施方式，在不偏离本公开的实质和范围的情况下可由本领域的技术人员实现其它的变型和变体。所有这些变型和变体都落入本公开的范围内。而且，所有在此描述的构件都可以由其他技术性上等同的构件来代替。

Claims (19)

  1. 一种密封连接结构，所述密封连接结构包括：
    第一连接件(1)，所述第一连接件(1)具有第一配合面(11)；
    第二连接件(2)，所述第二连接件(2)具有第二配合面(23)，其中，所述第二连接件(2)的所述第二配合面(23)和所述第一连接件(1)的所述第一配合面(11)构造成能够密封地接触从而在所述第一连接件(1)和所述第二连接件(2)之间形成密封接合面；以及
    弹性密封件，所述弹性密封件构造成装配在所述第一配合面(11)与所述第二配合面(23)之间，从而在所述第一连接件(1)与所述第二连接件(2)之间提供柔性密封结构。
  2. 根据权利要求1所述的密封连接结构，其中，
    所述第一配合面(11)和所述第二配合面(23)中的至少一者上设置有凹槽(5)，并且，所述弹性密封件装配在所述凹槽(5)中。
  3. 根据权利要求2所述的密封连接结构，其中，所述凹槽(5)垂直于所述第一配合面(11)或所述第二配合面(23)凹陷而形成。
  4. 根据权利要求1所述的密封连接结构，其中，所述第一配合面(11)和所述第二配合面(23)均为锥形面。
  5. 根据权利要求4所述的密封连接结构，其中，
    所述第一配合面(11)形成在所述第一连接件(1)的一个端面上，所述第二配合面(23)形成在所述第二连接件(2)的扩口部(22)的端面上；或者
    所述第一配合面(11)形成在所述第一连接件(1)的扩口部的端面上，所述第二配合面(23)形成在所述第二连接件(2)的一个端面上。
  6. 根据权利要求2所述的密封连接结构，其中，所述弹性密封件为O型 密封圈(4)。
  7. 根据权利要求6所述的密封连接结构，其中，所述O型密封圈(4)和所述凹槽(5)配置成使得在所述O型密封圈(4)预装配在所述凹槽(5)中的状态下，所述O型密封圈(4)不会从所述凹槽(5)脱落。
  8. 根据权利要求7所述的密封连接结构，其中，在所述O型密封圈(4)被预装配在所述凹槽(5)中的状态下，所述O型密封圈(4)的至少一部分(41)被所述凹槽(5)的壁的至少一部分(51)阻挡。
  9. 根据权利要求1所述的密封连接结构，其中，所述密封连接结构还包括构造成将所述第一连接件(1)和所述第二连接件(2)彼此紧固地连接的紧固件(3)。
  10. 根据权利要求9所述的密封连接结构，其中，所述紧固件(3)为套装在所述第一连接件(1)和所述第二连接件(2)外部的管接头。
  11. 根据权利要求1-10中的任一项所述的密封连接结构，其中，所述第一连接件(1)为以下部件的进口管部分或出口管部分：压缩机、热交换器、热力膨胀阀、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀；
    所述第二连接件(2)为连接至所述进口管部分或出口管部分的连接管。
  12. 一种用于流体输送管路的功能部件，其中，所述功能部件包括：
    第一连接件，所述第一连接件上形成有外螺纹并且在其端部具有锥形的第一配合面，在所述第一配合面上形成有凹槽；
    设置在所述凹槽中的弹性密封件；以及
    管接头，所述管接头具有与所述外螺纹配合的内螺纹以及与所述第一配合面配合的锥形的第三配合面。
  13. 根据权利要求12所述的功能部件，其中，所述弹性密封件为O型密封圈。
  14. 根据权利要求12所述的功能部件，其中，所述功能部件还包括管件，所述管件的端部具有扩口部，所述扩口部形成能够与所述第一连接件的第一配合面形成面密封的第二配合面。
  15. 根据权利要求12-14中任一项所述的功能部件，其中，所述功能部件选自由下述部件构成的组：压缩机、热交换器、热力膨胀阀、电子膨胀阀、储液罐、干燥器、视液镜、截止阀、四通换向阀。
  16. 一种热力膨胀阀，其中，所述热力膨胀阀包括：
    用于调节流体流量的阀体；
    设置在所述阀体上的第一连接件，所述第一连接件在其端部具有锥形的第一配合面，在所述第一配合面上形成有凹槽；以及
    设置在所述凹槽中的弹性密封件。
  17. 根据权利要求16所述的热力膨胀阀，其中，所述热力膨胀阀还包括管接头，所述管接头具有与形成在所述第一连接件上的外螺纹配合的内螺纹以及与所述第一配合面配合的锥形的第三配合面。
  18. 一种制冷/制热系统，其中，所述制冷/制热系统包括如权利要求1-11中任一项所述的密封连接结构或者如权利要求12-15中任一项所述的功能部件或者如权利要求16-17中任一项所述的热力膨胀阀。
  19. 一种流体输送系统，其中，所述流体输送系统包括如权利要求1-11中任一项所述的密封连接结构或者如权利要求12-15中任一项所述的功能部件或者如权利要求16-17中任一项所述的热力膨胀阀。
PCT/CN2018/102642 2017-08-28 2018-08-28 密封连接结构、功能部件、热力膨胀阀及系统 Ceased WO2019042269A1 (zh)

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CN201721086147.2U CN207334017U (zh) 2017-08-28 2017-08-28 密封连接结构、功能部件、热力膨胀阀及系统
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US20070236016A1 (en) * 2006-04-10 2007-10-11 Alexander Kloss Flared screw fitting
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US20070236016A1 (en) * 2006-04-10 2007-10-11 Alexander Kloss Flared screw fitting
CN103629456A (zh) * 2013-05-08 2014-03-12 孙海潮 一种专用于分体式空调制冷剂连接管路的连接螺母
CN206130355U (zh) * 2016-10-13 2017-04-26 何志林 一种航空流体管路接头
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