CN220623074U - Pipeline connecting assembly and thermal management system - Google Patents

Abstract

Embodiments of the present application provide a pipe connection assembly including a first fastener, a second fastener, a pressure plate, and a seal; along the axial direction of the pressing plate, one end part of the sealing piece is abutted with a first fastening piece, the other end part of the sealing piece is abutted with one end part of the pressing plate, the pressing plate is abutted with a second fastening piece, and the first fastening piece and the second fastening piece are in threaded connection; the first fastener comprises a first limiting part, the pressing plate comprises a second limiting part, and the first limiting part and the second limiting part are matched to limit circumferential rotation of the pressing plate. Thereby reducing friction of the pressing plate to the sealing element and reducing abrasion to the sealing element.

Description

Pipeline connecting assembly and thermal management system

Technical Field

The application relates to the technical field of pipeline connection, in particular to a pipeline connection assembly and a thermal management system.

Background

CO2 is used as a novel refrigerant for an automobile air conditioner, and the working pressure of the CO2 refrigerant is about 10 times higher than that of the traditional refrigerant R134a due to the transcritical circulation of the CO2 refrigerant. Therefore, a pipeline connecting structure capable of maintaining good sealing performance under high-pressure and high-temperature environments is needed to meet the sealing requirement of connecting pipelines of an automobile air conditioning system. In the process of disassembly and assembly and maintenance, the sealing element may be worn, and the risk of leakage of the pipeline connection is increased.

Disclosure of Invention

It is an object of the present utility model to provide a pipe connection assembly that reduces wear on the seal.

Embodiments of the present application provide a pipe connection assembly including a first fastener, a second fastener, a pressure plate, and a seal; along the axial direction of the pressing plate, one end part of the sealing piece is abutted with a first fastening piece, the other end part of the sealing piece is abutted with one end part of the pressing plate, the pressing plate is abutted with a second fastening piece, and the first fastening piece and the second fastening piece are in threaded connection; the first fastener comprises a first limiting part, the pressing plate comprises a second limiting part, and the first limiting part and the second limiting part are matched to limit circumferential rotation of the pressing plate.

The embodiment of the application provides a pipeline coupling assembling through setting up first spacing portion and second spacing portion, first spacing portion with the second spacing portion cooperation limits the relative circumference rotation of sealing member of clamp plate to reduce the friction of clamp plate to the sealing member, reduce the wearing and tearing to the sealing member.

Embodiments of the present application provide a pipe connection assembly comprising a first fastener comprising a first receiving groove, a second fastener comprising a second receiving groove, and a seal, at least a portion of the first fastener being located in the second receiving groove, the first fastener and the second fastener being threadably coupled; the second fastener includes an abutting portion abutting against one end portion of the seal, and the other end portion of the seal abuts against the first fastener.

The embodiment of the application provides a pipeline coupling assembly, and the second fastener includes the butt portion, and butt portion and sealing member's one end butt is sealed through the screw fastening, and pipeline coupling assembly's structure is simple relatively.

The embodiment of the application provides a thermal management system, including foretell piping connection subassembly, thermal management system still includes at least one among heat exchanger, flow adjusting device, compressor and the vapour and liquid separator, the heat exchanger, flow adjusting device, the compressor and at least one among the vapour and liquid separator with piping connection subassembly intercommunication.

The application provides a thermal management system, sealing member be difficult for wearing and tearing, when at least one of heat exchanger, flow control device, compressor and vapour and liquid separator and pipeline coupling assembling intercommunication, can improve the leakproofness of thermal management system pipeline, reduce the risk of leakage.

Drawings

FIG. 1 is a schematic view of a piping connection assembly according to a first embodiment of the present application;

FIG. 2 is an exploded view of the piping connection set price of FIG. 1;

FIG. 3 is a schematic view of the platen and first fastener of FIG. 1;

FIG. 4 is a cross-sectional view of the first fastener of FIG. 3;

FIG. 5 is a cross-sectional view of the platen of FIG. 3;

FIG. 6 is a cross-sectional view of the second fastener of FIG. 1;

FIG. 7 is a cross-sectional view of the tubing connection assembly of FIG. 1;

FIG. 8 is a schematic view of the seal of FIG. 1;

FIG. 9 is a cross-sectional view of the seal of FIG. 8;

FIG. 10 is a schematic view of a piping connection assembly according to a second embodiment of the present application;

FIG. 11 is a schematic view of the first fastener of FIG. 10;

FIG. 12 is a cross-sectional view of the first fastener of FIG. 11;

FIG. 13 is a schematic view of the platen of FIG. 10;

FIG. 14 is a cross-sectional view of the platen of FIG. 13;

FIG. 15 is a cross-sectional view of another embodiment of the platen of FIG. 13;

FIG. 16 is a cross-sectional view of the tubing connection assembly of FIG. 10;

FIG. 17 is a schematic view of a piping connection assembly according to a third embodiment of the present application;

FIG. 18 is a schematic view of the platen of FIG. 17;

FIG. 19 is a cross-sectional view of the tubing connection assembly of FIG. 17;

FIG. 20 is a schematic view of a piping connection assembly according to a fourth embodiment of the present application;

FIG. 21 is a schematic view of the second fastener of FIG. 20;

FIG. 22 is a cross-sectional view of the second fastener of FIG. 21;

fig. 23 is a cross-sectional view of the tubing connection assembly of fig. 20.

Drawings

10. A first connector; 20. a second connector;

100. a fastening assembly; 30. a first fastener; 31. a first accommodation groove; 311. a second step portion; 312. a first accommodation chamber; 313. a second accommodation chamber; 314. a second limit part; 32. a first mounting groove; 321. a first step portion; 33. a first duct; 34. a limit groove;

40. a second fastener; 41. a second accommodation groove; 411. a mounting cavity; 42. a mating hole; 43. an abutting portion;

44. a third mounting groove; 45; a third orifice;

50. a pressing plate; 51. a second mounting groove; 511. a third step portion; 52. a second orifice; 53. a step portion; 54. a limit protrusion;

55. a first connection portion; 551. a first limit part; 56. a second connecting portion; 57. a first section; 58. a second section;

60. a seal; 61. a through hole; 62. a first section; 63. a second section; 64. a third section;

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings and specific examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

It should be understood that although the first, second, third, fourth, etc. may be used in this application to describe various information, these information should not be limited to these descriptions. These terms are only used to distinguish one type of information from another. Plural means two or more. The features of the examples and embodiments described below can be supplemented or combined with one another without conflict.

The pipeline connection assembly provided by at least one embodiment of the application can be applied to a vehicle thermal management system or an air conditioning system, wherein the vehicle thermal management system comprises a new energy vehicle thermal management system.

According to a first embodiment of the pipe coupling assembly of the present application, as shown in fig. 1 to 9, the pipe coupling assembly includes a first coupling member 10, a second coupling member 20, a fastening assembly 100, and a sealing member 60, the first coupling member 10 and the second coupling member 20 being fixedly coupled by the fastening assembly 100; specifically, the two ends of the first connecting piece 10 are open and hollow, the two ends of the second connecting piece 20 are open and hollow, one end of the first connecting piece 10 is in sealing connection with the fastening assembly 100, the other end of the first connecting piece 10 is communicated with other heat management components in the vehicle heat management system or corresponding external pipes, one end of the second connecting piece 20 is in sealing connection with the fastening assembly 100, and the other end of the second connecting piece 20 is communicated with other heat management components in the vehicle heat management system or corresponding external pipes. The sealing connection may be realized by welding, bonding, or the like, or may be realized by a seal ring or the like.

The fastening assembly 100 includes a first fastener 30, a second fastener 40, and a platen 50, at least a portion of the first fastener 30 being located on one side of the platen 50 and at least a portion of the second fastener 40 being located on an opposite side of the platen 50 in an axial direction of the platen 50; the first fastener 30 comprises a first accommodating groove 31, the sealing element 60 is positioned in the first accommodating groove 31, at least part of the pressing plate 50 is positioned in the first accommodating groove 31, one end of the sealing element 60 is abutted against the first fastener 30, the other end of the sealing element 60 is abutted against the pressing plate 50, and the first fastener 30 and the second fastener 40 are in threaded connection; the first fastener 30 includes a first limiting portion, the pressing plate 50 includes a second limiting portion, and the first limiting portion and the second limiting portion cooperate to limit circumferential rotation of the pressing plate 50. In this scheme, through the cooperation of first spacing portion and second spacing portion, can restrict the circumferential direction of clamp plate 50, clamp plate 50 only can follow axial displacement, and then the part or take place relative rotation between clamp plate 50 and the sealing member 60, reduce the friction of clamp plate 50 to sealing member 60, and then reduce the wearing and tearing to sealing member 60 coating, improve pipeline coupling assembling's sealing performance and sealing member 60's life-span.

Referring to fig. 3-4, the first fastener 30 has a first receiving groove 31, the first receiving groove 31 has an opening, the opening of the first receiving groove 31 is directed toward the second fastener 40 in the axial direction of the fastening assembly 100, and the seal 60 is located in the first receiving groove 31; the first fastener 30 includes a first mounting groove 32, the first mounting groove 32 has an opening in an axial direction of the fastener, the opening of the first mounting groove 32 faces the first connector 10, that is, the opening directions of the first receiving groove 31 and the first mounting groove 32 are opposite, and the cavity of the first mounting groove 32 communicates with the cavity of the first receiving groove 31. The first connecting piece 10 is connected with the first fastening piece 30 in a sealing manner, at least part of the first connecting piece 10 is located in the first mounting groove 32, that is, one end of the first connecting piece 10 abuts against the bottom of the first mounting groove 32, and is connected with the first connecting piece in a sealing manner and is fixed in a fixed manner by welding, however, in other embodiments, the first connecting piece 10 can also be connected with the first connecting piece in a fixed and sealed manner by bonding, riveting, interference or the like. In some embodiments, the first fastener 30 further has a first hole 33, the first hole 33 communicates with the cavity of the first mounting groove 32 and the cavity of the first receiving groove 31, and the inner diameter of the first hole 33 is smaller than the inner diameter of the first mounting groove 32, and the inner diameter of the first hole 33 is smaller than the inner diameter of the first receiving groove 31, that is, a first stepped portion 321 and a second stepped portion 311 are formed for supporting the first connector 10 and the sealing member 60, that is, the end portion of the first connector 10 abuts against the first stepped portion 321, and one end portion of the sealing member 60 abuts against the second stepped portion 311. The first connector 10 has an external thread provided on at least part of the outer wall of the first connector 10. In this embodiment, a portion of the outer wall of the first fastener 30 is polygonal, for example hexagonal, to facilitate clamping of the first fastener 30 during installation.

Referring to fig. 3 and 5, the pressing plate 50 includes a second mounting groove 51, the second mounting groove 51 has an opening, along an axial direction of the pressing plate 50, the opening of the second mounting groove 51 faces the second connecting member 20, at least part of the second connecting member 20 is located in the second mounting groove 51, the second connecting member 20 is fixedly and sealingly connected to the pressing plate 50, and the second connecting member 20 may be fixedly and sealingly connected by welding, or, in other embodiments, may be fixedly and sealingly connected by bonding, riveting, interference, or the like. The pressing plate 50 has a second hole 52, the second hole 52 communicates with the cavity of the second mounting groove 51, the second hole 52 has an inner diameter smaller than that of the second mounting groove 51, that is, a third step 511 is formed, and an end of the second connecting member 20 abuts against the third step 511.

Referring to fig. 6, the second fastener 40 includes a second receiving groove 41 having an opening, and a fitting hole 42, the second receiving groove 41 having an opening toward the first fastener 30 in an axial direction of the second fastener 40, the fitting hole 42 having an opening direction opposite to an opening direction of the second receiving groove 41, and an inner diameter of the fitting hole 42 being smaller than an inner diameter of the second receiving groove 41, and the fitting hole 42 communicating with a cavity of the second receiving groove 41. When assembled, the second connector 20 is fixedly and sealingly connected to the platen 50 through the second fastener 40. In the axial direction of the fastening assembly 100, at least a portion of the pressing plate 50 is located in the first receiving groove 31, and at least a portion of the pressing plate 50 is located in the second receiving groove 41. The first fastener 30 is provided with external threads, the second fastener 40 is provided with internal threads, the second fastener 40 is sleeved on the periphery of the pressing plate 50, and the second fastener 40 presses the pressing plate 50 to abut against the sealing piece 60, so that sealing connection is realized. Specifically, during assembly, one end portion of the first connecting member 10 is located in the first mounting groove 32 of the first fastening member 30 and is fixedly and sealingly connected with the first fastening member 30, one end portion of the second connecting member 20 is located in the second mounting groove 51 of the pressing plate 50 and is fixedly and sealingly connected with the pressing plate 50, the sealing member 60 is located in the first accommodating groove 31 of the first fastening member 30, the other end portion of the second connecting member 20 penetrates through the second fastening member 40, the bottom of the second accommodating groove 41 of the second fastening member 40 abuts against one end portion of the pressing plate 50, the external threads of the first fastening member 30 are matched with the internal threads of the second fastening member 40, rotation of the threads is converted into movement of the pressing plate 50 in the axial direction of the fastening assembly 100, the end portion of the sealing member 60 abuts against the end portion of the pressing plate 50, and the axial movement of the pressing plate 50 applies pressure on the sealing member 60, so that the sealing member 60 is pressed. The assembly mode of the embodiment has simple structure and simple assembly process compared with the sealing mode of single screw fastening or double screw fastening. The fixing mode of single screw fastening is adopted, because the position of screw fastening is at one side of the sealing element 60, the stress of the sealing element 60 is uneven, and the sealing effect is affected.

The sealing member 60 of the application comprises a metal layer and a nonmetal layer, the sealing member 60 is of an annular structure, the sealing member 60 comprises through holes 61, and the through holes 61 penetrate through two end parts of the sealing member 60 along the axis of the fastening assembly 100, so that medium can circulate conveniently. In this scheme, the metal layer mainly plays the supporting role, and but the metal layer atress elastic deformation. The nonmetal layers are adhered to the two sides of the metal layer in a coating, adhesion, crimping and other modes, the thickness of the nonmetal layer with the sealing effect of the sealing element 60 can be reduced through combination of the metal layer and the nonmetal layer, the thickness of the nonmetal layer with the sealing effect of the sealing element 60 is reduced, a channel penetrated by a working medium is narrowed, leakage of the working medium is reduced, the sealing element is suitable for a thermal management system with Ra or other conventional refrigerants, particularly suitable for a thermal management system with CO2 refrigerants serving as the working medium, and the risk that the valve device leaks out due to high-pressure leakage of the CO2 refrigerants can be effectively reduced. Too small a thickness of the non-metallic layer may not achieve the designed contact pressure for the seal 60 and too large a thickness of the non-metallic layer may increase the likelihood of penetration and thus the non-metallic layer. Since the thickness of the non-metal layer is very thin compared with that of the common O-ring, the elastic deformation generated can be small, and the metal layer can provide larger elastic deformation to compensate the elastic deformation of the sealing element 60, so that the sealing element 60 has good sealing effect. Specifically, the metal layer can be made of metals such as steel, iron, aluminum and the like or alloys thereof; the nonmetallic layer may be generally made of rubber and its derivatives, polytetrafluoroethylene (PTFE), or other nonmetallic materials having elasticity. The annular shape herein is understood to include an annular shape in which the through hole 61 is circular, rectangular, triangular, elliptical, or irregularly shaped, unless otherwise specified.

In this application, the sealing element 60 may be a plate-shaped structure, in other embodiments, for better sealing effect, along the radial direction of the sealing element 60, the sealing element 60 includes a first portion 62, a second portion 63, and a third portion 64, opposite ends of the third portion 64 are respectively connected with the first portion 62 and the second portion 63, and are fixedly connected or integrally structured, specifically, opposite ends of the third portion 64 are respectively integrally structured with the first portion 62 and the second portion 63, so as to improve the structural firmness of the sealing element 60. The first portion 62 and the second portion 63 are plate-shaped and parallel or substantially parallel, extend in the radial direction, have a height difference in the axial direction of the seal 60, and the third portion 64 is inclined with respect to the first portion 62 and the second portion 63, and it is understood that the seal 609 has a substantially Z-shaped cross-sectional shape when axially sectioned at any position in the circumferential direction. In the present embodiment, the first portion 62, the second portion 63, and the third portion 64 are all plate-shaped, and in other embodiments, the connection structure is not limited thereto. In the assembly, the structure can realize multi-point sealing, and the leakage probability of the working medium is reduced.

In the process of assembling, the first fastening piece 30 and the second fastening piece 40 drive the pressing plate 50 to rotate and move towards the direction of the sealing piece 60 in the screwing process, when the pressing plate 50 is abutted against the sealing piece 60, the pressing plate 50 rotates relative to the sealing piece 60 or the pressing plate 50 can drive the sealing piece 60 to rotate under the action of friction force, so that the surface coating of the gasket can be worn in the compacting process, and the risks of leakage and failure are increased;

to solve the above-mentioned problem, in this embodiment, the fastening assembly 100 further includes a limiting structure, which is mainly used to limit the rotation of the pressing plate 50 or the sealing member 60. The pipe connection assembly includes a first limiting portion and a second limiting portion, in this embodiment, the first limiting portion is located at an inner wall portion of the first fastener 30, the second limiting portion is located at an outer wall portion of the pressing plate 50, the first limiting portion is one of the limiting protrusion 54 and the limiting groove 34, the second limiting portion is the other one of the limiting protrusion 54 and the limiting groove 34, and at least part of the limiting protrusion 54 is located in the limiting groove 34, so as to limit axial rotation of the pressing plate 50. Referring to fig. 3-7, the example of the retaining protrusion 54 being located on the pressure plate 50 and the retaining groove 34 being located on the first fastener 30 is described in detail. The limiting protrusion 54 is located on the outer periphery of the pressing plate 50, along the radial direction of the pressing plate 50, the limiting protrusion 54 extends from the outer periphery of the pressing plate 50 in a direction away from the axis of the pressing plate 50, and along the axial direction of the pressing plate 50, the limiting protrusion 54 extends from the end of the pressing plate 50 toward the first fastener 30 to the other end. The spacing groove 34 is located the inner wall portion of first fastener 30, along the radial of first fastener 30, spacing groove 34 has the opening, spacing groove 34 opening is towards the axial of first fastener 30, at least part spacing protruding 54 is located spacing groove 34, during the assembly, spacing protruding 54 slides along the axial of fastening assembly 100 in spacing groove 34 to the circumferential rotation of restriction clamp plate 50 reduces the friction between clamp plate 50 and the sealing member 60, and then reduces the wearing and tearing to the surface coating of sealing member 60 at the in-process that compresses tightly, improves sealed effect and sealing member 60 life-span. The number of the limiting protrusions 54 and the limiting grooves 34 is at least one, but of course, the number of the limiting protrusions 54 and the limiting grooves 34 may be plural, and when the number of the limiting protrusions 54 is plural, the limiting protrusions 54 are arranged along the axial direction of the pressing plate 50, and the limiting grooves 34 are arranged at corresponding positions of the first fastening member 30.

As shown in fig. 10-16, the second embodiment of the present application differs from the first embodiment in that the limiting structure is different. Specifically, the first limiting portion 551 is located at an inner wall portion of the first fastener 30, the second limiting portion 314 is located at an outer wall portion of the pressing plate 50, and the cross sections of the first limiting portion 551 and the second limiting portion 314 perpendicular to the axial direction of the pressing plate 50 are non-circular.

In this embodiment, the pressing plate 50 includes a first connecting portion 55 and a second connecting portion 56, along the axial direction of the pressing plate 50, the second connecting portion 56 is close to the first fastener 30 relative to the first connecting portion 55, the outer diameter of the first connecting portion 55 is larger than the outer diameter of the second connecting portion 56, the first limiting portion 551 is located at the outer wall portion of the first connecting portion 55, and the cross section of the first limiting portion 551 perpendicular to the axial direction of the pressing plate 50 is hexagonal; the first accommodating groove 31 of the first fastener 30 includes a first accommodating cavity 312 and a second accommodating cavity 313, along the axial direction of the first fastener 30, the first accommodating cavity 312 is close to the pressing plate 50 relative to the second accommodating cavity 313, the second limiting portion 314 is located in the first accommodating cavity 312, at least part of the first connecting portion 55 is located in the first accommodating cavity 312, and at least part of the second connecting portion 56 is located in the second accommodating cavity 313, it is understood that the first limiting portion 551 is in contact with the second limiting portion 314, that is, the second limiting portion 314 is at least a part of a wall portion forming the first accommodating cavity 312, the second limiting portion 314 is hexagonal in a section perpendicular to the axial direction of the pressing plate 50, and when the first limiting portion and the second limiting portion are mutually matched, circumferential rotation of the pressing plate 50 is limited. Of course, in other embodiments, as shown in fig. 15, at least one side of the first limiting portion 551 and the second limiting portion 314 in a cross section perpendicular to the axial direction of the platen 50 has a linear structure, that is, may be polygonal, or may have a linear shape, and the other sides have an arc shape, which naturally includes other special-shaped structures, and it is also understood that the cross sections of the first limiting portion 551 and the second limiting portion 314 in the axial direction of the platen 50 are non-circular.

As shown in fig. 17 to 19, the third embodiment of the present application is different from the first embodiment in that the structure of the pressing plate 50 is not used. Specifically, in the present embodiment, the pressing plate 50 includes the step portion 53, and the step portion 53 is located at the outer wall portion of the pressing plate 50, and is disposed along the circumferential direction of the pressing plate 50, and the step portion 53 of the pressing plate 50 abuts against the bottom of the second accommodating groove 41 along the axial direction of the pressing plate 50.

In this embodiment, the pressing plate 50 includes a first section 57 and a second section 58, and along the axial direction of the pressing plate 50, the first section 57 is close to the second connecting member 20 relative to the second section 58, and the outer diameter of the first section 57 is smaller than the outer diameter of the second section 58, that is, a step 53 is formed at the transition between the first section 57 and the second section 58. As shown in fig. 19, when assembled, the first section 57 of the pressing plate 50 and the second connecting member 20 pass through the mating hole 42 of the second fastening member 40, and the bottom of the second receiving groove 41 of the second fastening member 40 abuts against the step 53 of the pressing plate 50, thereby driving the pressing plate 50 to move in the direction of the sealing member 60. The second connecting piece 20 is fixed with the pressing plate 50 through the mode of brazing, the welding part between the second connecting piece 20 and the pressing plate 50 possibly causes overflow of brazing filler metal, partial areas of the end parts of the pressing plate 50 are uneven, when the end parts of the pressing plate 50 are abutted with the second fastening pieces 40, uneven stress of the pressing plate 50 is possibly caused, and then uneven stress of the sealing piece 60 is possibly caused, and sealing effect is affected. In this embodiment, the limiting protrusion 54 of the pressing plate 50 is located at the outer periphery of the second section 58, and it is understood that other structural features of the pressing plate 50 are the same as or similar to those of the pressing plate 50 in embodiment 1. Of course, the limiting structure in embodiment 2 is also applicable to the pipe connection assembly in embodiment 1.

As shown in fig. 20 to 23, the pipe coupling assembly according to the fourth embodiment of the present application includes a first coupling member 10, a second coupling member 20, a fastening assembly 100, and a sealing member 60, and the first coupling member 10 and the second coupling member 20 are fixedly coupled by the fastening assembly 100. Specifically, the two ends of the first connecting piece 10 are open and hollow, the two ends of the second connecting piece 20 are open and hollow, one end of the first connecting piece 10 is in sealing connection with the fastening assembly 100, the other end of the first connecting piece 10 is communicated with other heat management components in the vehicle heat management system or corresponding external pipes, one end of the second connecting piece 20 is in sealing connection with the fastening assembly 100, and the other end of the second connecting piece 20 is communicated with other heat management components in the vehicle heat management system or corresponding external pipes. The sealing connection may be realized by welding, bonding, or the like, or may be realized by a seal ring or the like.

The fastening assembly 100 includes a first fastener 30 and a second fastener 40, the first fastener 30 and the second fastener 40 being threadably connected. Specifically, the first fastener 30 has a first receiving groove 31, the first receiving groove 31 has an opening, the opening of the first receiving groove 31 faces the second fastener 40 in the axial direction of the fastening assembly 100, and the seal 60 is located in the first receiving groove 31; the first fastener 30 includes a first mounting groove 32, the first mounting groove 32 has an opening in an axial direction of the fastener, the opening of the first mounting groove 32 faces the first connector 10, that is, the opening directions of the first receiving groove 31 and the first mounting groove 32 are opposite, and the cavity of the first mounting groove 32 communicates with the cavity of the first receiving groove 31. The first connecting piece 10 is fixedly and sealingly connected with the first fastening piece 30, at least part of the first connecting piece 10 is located in the first mounting groove 32, that is, an end portion of the first connecting piece 10 abuts against the bottom of the first mounting groove 32, and is fixedly and sealingly connected by welding, however, in other embodiments, the first connecting piece 10 may be fixedly and sealingly connected by bonding, riveting, interference, or the like. In some embodiments, the first fastener 30 further has a first hole 33, and the first hole 33 communicates with the cavity of the first mounting groove 32 and the cavity of the first receiving groove 31, that is, forms a first stepped portion 321 and a second stepped portion 311 for supporting the first connector 10 and the seal 60, respectively, that is, the end of the first connector 10 abuts against the first stepped portion 321, and one end of the seal 60 abuts against the second stepped portion 311, referring to fig. 4 in the first embodiment. The first fastener 30 has external threads disposed on at least a portion of an outer wall of the first fastener 30. In this embodiment, a portion of the outer wall of the first fastener 30 is polygonal, for example hexagonal, to facilitate clamping of the first fastener 30 during installation.

The second fastening member 40 includes a second accommodation groove 41 and a third installation groove 44, the second accommodation groove 41 has an opening, the opening of the second accommodation groove 41 is directed toward the first fastening member 30 in the axial direction of the fastening member, the opening direction of the third installation groove 44 is opposite to the opening direction of the second accommodation groove 41, the second fastening member 40 further includes a third duct 45, and the inner diameter of the third duct 45 is smaller than the inner diameter of the second accommodation groove 41 and the inner diameter of the third installation cavity 411, and the third duct 45 communicates with the cavity of the second accommodation groove 41, and the third duct 45 communicates with the cavity of the third installation groove 44. At least a portion of the second connector 20 is positioned in the third mounting groove 44, and the second connector 20 is sealingly and fixedly coupled to the second fastener 40, and is fixedly and sealingly coupled by welding, although in other embodiments, it may be fixedly and sealingly coupled by bonding, riveting, interference, etc. The second fastener 40 further includes an abutment portion 43, the abutment portion 43 is located in the second accommodating groove 41, the abutment portion 43 extends from a bottom wall of the second accommodating groove 41 toward an opening direction of the second accommodating groove 41 along an axial direction of the second fastener 40, an outer diameter of the abutment portion 43 is smaller than an inner diameter of the second accommodating groove 41, that is, an inner wall forming the second accommodating groove 41 and an outer wall of the abutment portion 43 define a mounting cavity 411, at least a portion of the abutment portion 43 is located in the first accommodating groove 31 of the first fastener 30, and at least a portion of the first fastener 30 is located in the mounting cavity 411. The second fastener 40 has an internal thread located at an inner wall portion of the second accommodation groove 41. During assembly, one end of the first connecting piece 10 is located in the first mounting groove 32 of the first fastening piece 30 and is fixedly and hermetically connected with the first fastening piece 30, one end of the second connecting piece 20 is located in the third mounting groove 44 of the second fastening piece 40 and is fixedly and hermetically connected with the second fastening piece 40, the sealing piece 60 is located in the first accommodating groove 31 of the first connecting piece 10, the external threads of the first fastening piece 30 are matched and fastened with the internal threads of the second fastening piece 40, the abutting part 43 abuts against one end of the sealing piece 60, and pressure is applied to the sealing piece 60, so that the sealing piece 60 is pressed tightly, and a sealing effect is achieved. The assembly mode of the embodiment has simple structure and simple assembly process compared with the sealing mode of single screw fastening or double screw fastening. By adopting the fixing mode of single screw fastening, because the position of screw fastening is at one side of the sealing element 60, the stress of the sealing element 60 is uneven, and the sealing effect is affected.

The above-mentioned pipe connection assembly is identical to a heat management system, particularly a heat management system of a vehicle, the heat management system including a heat exchanger, a flow rate adjustment device, a compressor, and a gas-liquid separator, at least one of the heat exchanger, the flow rate adjustment device, the compressor, and the gas-liquid separator being in communication with the pipe connection assembly.

It should be noted that: the above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present utility model may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present utility model are intended to be included in the scope of the claims of the present utility model.

Claims (12)

1. A pipe connection assembly comprising a first fastener (30), a second fastener (40), a pressure plate (50) and a seal (60); along the axial direction of the pressing plate (50), one end part of the sealing element (60) is abutted against a first fastening piece (30), the other end part of the sealing element (60) is abutted against one end part of the pressing plate (50), the pressing plate (50) is abutted against a second fastening piece (40), and the first fastening piece (30) and the second fastening piece (40) are in threaded connection; the first fastener (30) comprises a first limiting portion, the pressing plate (50) comprises a second limiting portion, and the first limiting portion and the second limiting portion are matched to limit circumferential rotation of the pressing plate (50).

2. The pipe connection assembly of claim 1, wherein the first fastener (30) includes a first receiving groove (31), the seal (60) is located in the first receiving groove (31), and at least a portion of the pressure plate (50) is located in the first receiving groove (31).

3. The pipe connection assembly of claim 1, wherein the first limit portion is located at an inner wall portion of the first fastener (30), the second limit portion is located at an outer wall portion of the pressure plate (50), the first limit portion is one of a limit protrusion (54) and a limit groove (34), the second limit portion is the other of the limit protrusion (54) and the limit groove (34), and at least a portion of the limit protrusion (54) is located in the limit groove (34).

4. The pipe connection assembly of claim 2, wherein the first limit portion is located at an inner wall portion of the first fastener (30), the second limit portion is located at an outer wall portion of the pressure plate (50), the first limit portion is one of a limit protrusion (54) and a limit groove (34), the second limit portion is the other of the limit protrusion (54) and the limit groove (34), and at least a portion of the limit protrusion (54) is located in the limit groove (34).

5. The pipe connection assembly according to any one of claims 1-4, wherein the second fastener (40) comprises a second receiving groove (41), at least part of the pressure plate (50) is located in the second receiving groove (41), and an end of the pressure plate (50) abuts against a bottom of the second receiving groove (41) along an axial direction of the pressure plate (50);

alternatively, the pressure plate (50) comprises a step part (53), the step part (53) is located on the outer wall part of the pressure plate (50) and is arranged along the circumferential direction of the pressure plate (50), and the step part (53) is abutted with the bottom of the second accommodating groove (41) along the axial direction of the pressure plate (50).

6. The pipe connection assembly according to claim 2, wherein the first limiting portion (551) is located at an inner wall portion of the first fastener (30), the second limiting portion (314) is located at an outer wall portion of the pressure plate (50), and the first limiting portion (551) and the second limiting portion (314) are non-circular in cross section perpendicular to an axial direction of the pressure plate (50).

7. The pipe connection assembly according to claim 6, wherein the pressure plate (50) includes a first connecting portion (55) and a second connecting portion (56), the second connecting portion (56) being adjacent to the first fastener (30) with respect to the first connecting portion (55) in an axial direction of the pressure plate (50), an outer diameter of the first connecting portion (55) being larger than an outer diameter of the second connecting portion (56), the first stopper portion (551) being located at an outer wall portion of the first connecting portion (55); the first accommodating groove (31) of the first fastener (30) comprises a first accommodating cavity (312) and a second accommodating cavity (313), the first accommodating cavity (312) is close to the pressing plate (50) relative to the second accommodating cavity (313) along the axial direction of the pressing plate (50), the second limiting part (314) is positioned in the first accommodating cavity (312), at least part of the first connecting part (55) is positioned in the first accommodating cavity (312), and at least part of the second connecting part (56) is positioned in the second accommodating cavity (313).

8. The pipe connection assembly according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that the pipe connection assembly comprises a first connection piece (10) and a second connection piece (20), the first fastening piece (30) comprises a first mounting groove (32), at least part of the first connection piece (10) is located in the first mounting groove (32), the first connection piece (10) and the first fastening piece (30) are fixedly and sealingly connected; the pressing plate (50) is provided with a second mounting groove (51), at least part of the second connecting piece (20) is positioned in the second mounting groove (51), and the second connecting piece (20) is fixedly and hermetically connected with the pressing plate (50).

9. The pipe connection assembly according to claim 8, wherein the first fastener (30) has external threads, the second fastener (40) has internal threads, the second fastener (40) is sleeved on the periphery of the pressure plate (50), and the second fastener (40) compresses the pressure plate (50) to abut against the sealing element (60) so as to realize sealing connection.

10. A pipe connection assembly comprising a first fastener (30), a second fastener (40) and a seal (60), the first fastener (30) comprising a first receiving groove (31), the seal (60) being located in the first receiving groove (31), the second fastener (40) comprising a second receiving groove (41), at least part of the first fastener (30) being located in the second receiving groove (41), the first fastener (30) and the second fastener (40) being threadably connected; the second fastener (40) includes an abutting portion (43), the abutting portion (43) abuts against one end portion of the seal (60), and the other end portion of the seal (60) abuts against the first fastener (30).

11. The pipe connection assembly according to claim 10, wherein the abutment portion (43) is located in the second accommodation groove (41), the abutment portion (43) extends from a bottom of the second accommodation groove (41) toward the first fastener (30) in an axial direction of the second fastener (40), and an outer diameter of the abutment portion (43) is smaller than an inner diameter of the second accommodation groove (41).

12. A thermal management system comprising the piping connection assembly of any one of claims 1-9, further comprising a heat exchanger, a flow regulating device, a compressor, and a gas-liquid separator, at least one of the heat exchanger, the flow regulating device, the compressor, and the gas-liquid separator being in communication with the piping connection assembly.