Pipe joint structure and heat pump system
By designing limit steps and annular protrusions in the pipe joint structure and limiting the displacement of the annular protrusions by using the inverted rotation force, the problem of vibration loosening of traditional pipe joints is solved, and better sealing performance and reliability are achieved.
Patent Information
- Application Number
- CN202420274426.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-04
AI Technical Summary
Traditional pipe fittings are prone to loosening due to vibration when operating a triple heat pump system, resulting in a degradation of sealing performance.
A pipe joint structure is designed, by providing a limiting step in the first connecting member and an annular protrusion on the outer periphery of the second connecting member, the limiting step applies a reverse rotation force to the annular protrusion to limit the annular protrusion. circumferential displacement to prevent loosening of the pipe joint.
It effectively prevents loosening of the pipe joint during operation, ensures sealing performance, and improves the reliable performance of the pipe joint.
Smart Images
Figure CN222479739U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat pumps, and in particular to a pipe joint structure and a heat pump system. Background Art
[0002] With the development of technology, the application of trigeneration heat pump system is becoming more and more extensive, which can meet the various needs of users such as cooling, heating and hot water production. The hydraulic module of the trigeneration heat pump system is an important functional module for realizing water circulation drive. When installing the hydraulic module, its pipes need to be connected and fixed through pipe joints.
[0003] Most traditional pipe joints are fixed directly between pipes by threaded connection. However, when the trigeneration heat pump system is running, inevitable vibration will occur at the pipe joints, which may cause the pipe joints to loosen, making it impossible to ensure the sealing performance of the pipe joints. Utility Model Content
[0004] The utility model provides a pipe joint structure to solve the technical problem that the pipe joint in the prior art may become loose.
[0005] To achieve the above-mentioned purpose, the pipe joint structure proposed in the present application is used to connect a first pipe to be connected and a second pipe to be connected, wherein the pipe joint structure includes a first connecting piece connected to the first pipe to be connected and a second connecting piece connected to the second pipe to be connected, a connecting hole is provided in the first connecting piece, the connecting hole passes through the first connecting piece, and a limiting step is provided on the inner side of one end of the connecting hole; an annular protrusion is provided on the outer periphery of the second connecting piece; during installation, one end of the second connecting piece is inserted into the connecting hole, and the other end is exposed from the connecting hole, and the annular protrusion is abutted against the limiting step; when the annular protrusion and the limiting step are in an abutting state, and the annular protrusion rotates relative to the limiting step, the limiting step applies a force on the annular protrusion that is opposite to the rotation direction of the annular protrusion.
[0006] Optionally, in one embodiment, the limiting step has an anti-loosening tooth surface, and the annular protrusion can abut against the anti-loosening tooth surface.
[0007] Optionally, in one embodiment, a plurality of first saw teeth are provided on the anti-loosening tooth surface, the plurality of first saw teeth are arranged in a stepped ring shape, and the tooth surface of each of the first saw teeth is a bevel.
[0008] Optionally, in one embodiment, a plurality of second saw teeth are provided on the side of the annular protrusion facing the limiting step, the plurality of second saw teeth are arranged in a stepped ring shape, and the tooth surface of each of the second saw teeth is a slope, and the inclination direction of the plurality of first saw teeth is opposite to the inclination direction of the plurality of second saw teeth.
[0009] Optionally, in one embodiment, the pipe joint structure also includes a gasket, which has a first end face and a second end face, and the gasket is sleeved on the outer peripheral wall of the second connecting member so that the first end face abuts against the side of the annular protrusion facing away from the limiting step, and the second end face abuts against the first pipe to be connected.
[0010] Optionally, in one embodiment, a rotation-stopping portion is provided between the gasket and the second connecting member, and the rotation-stopping portion is used to prevent the gasket from rotating.
[0011] Optionally, in one embodiment, the anti-rotation portion includes a boss arranged on the outer peripheral wall of the second connecting member, the inner peripheral wall of the gasket is provided with a groove, and the boss is installed in the groove.
[0012] Optionally, in one embodiment, the number of the bosses and the number of the grooves are two, the two grooves are arranged at intervals along the circumferential direction of the gasket, and the bosses and the grooves are arranged in a one-to-one correspondence.
[0013] Optionally, in one embodiment, a rounded structure is provided at the first end surface, and the cutting groove is provided close to a side where the rounded structure is located.
[0014] The present application also provides a heat pump system, which includes the pipe joint structure described above.
[0015] The pipe joint structure provided in the present application limits the circumferential displacement of the annular protrusion in the connecting hole by abutting the annular protrusion of the second connecting member against the limiting step of the first connecting member, and causing the limiting step to apply a force on the annular protrusion that is opposite to the rotation direction of the annular protrusion, thereby preventing the pipe joint structure from loosening during operation, thereby ensuring the sealing performance of the pipe joint structure and improving the reliability of the pipe joint structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0017] Figure 1 A schematic diagram of the structure of the pipe joint provided for this application;
[0018] Figure 2 A schematic diagram of the structure of the first connecting member provided in this application;
[0019] Figure 3A schematic diagram of the structure of the second connecting member provided in this application;
[0020] Figure 4 A schematic structural diagram of the second connecting member provided in the present application at another angle;
[0021] Figure 5 A schematic diagram of the structure of the gasket provided for this application;
[0022] Figure 6 A schematic cross-sectional view of the gasket provided in this application.
[0023] Description of Figure Numbers:
[0024] Label name Label name Label name 10 First connecting piece 13 Internal thread 31 First end face 11 Connection hole 20 Second connecting piece 32 Second end face 12 Limiting steps 21 Ring bulge 33 Grooving 121 Anti-loosening tooth surface 22 Boss 34 Rounded corner structure 122 First sawtooth 30 Gasket
[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0027] The embodiment of the present application provides a pipe joint structure to solve the technical problem that the pipe joint in the prior art may become loose. The structure will be described below in conjunction with the accompanying drawings.
[0028] In the embodiments of the present application, Figure 1-Figure 3 As shown, the pipe joint structure is used to connect a first pipe to be connected and a second pipe to be connected, wherein the pipe joint structure includes a first connecting piece 10 connected to the first pipe to be connected and a second connecting piece 20 connected to the second pipe to be connected, a connecting hole 11 is provided in the first connecting piece 10, the connecting hole 11 passes through the first connecting piece 10, and a limiting step 12 is provided on the inner side of one end of the connecting hole 11; an annular protrusion 21 is provided on the outer periphery of the second connecting piece 20; during installation, one end of the second connecting piece 20 is inserted into the connecting hole 11, and the other end is exposed from the connecting hole 11, and the annular protrusion 21 is abutted against the limiting step 12; when the annular protrusion 21 is in abutting state with the limiting step 12, and the annular protrusion 21 rotates relative to the limiting step 12, the limiting step 12 applies a force on the annular protrusion 21 in the opposite direction of the rotation of the annular protrusion 21.
[0029] It should be noted that the hydraulic module of the trigeneration heat pump system is an important functional module for realizing water circulation drive. When installing the hydraulic module, its pipes need to be connected and fixed through pipe joints. Most traditional pipe joints are directly fixed by threaded connection. However, when the trigeneration heat pump system is running, the pipe joints will inevitably vibrate, which may cause the pipe joints to loosen, and thus the sealing performance of the pipe joints cannot be guaranteed.
[0030] To do this, see Figure 1-Figure 3 The pipe joint structure provided in the present application limits the circumferential displacement of the annular protrusion 21 in the connecting hole 11 by abutting the annular protrusion 21 of the second connecting member 20 against the limiting step 12 of the first connecting member 10, and makes the limiting step 12 apply a force on the annular protrusion 21 in the opposite direction to the rotation direction of the annular protrusion 21, thereby preventing the pipe joint structure from loosening during operation, thereby ensuring the sealing performance of the pipe joint structure and improving the reliability of the pipe joint structure.
[0031] For details, please refer to Figure 1 and Figure 2 The first connecting piece 10 can be a nut, and the outer peripheral wall of the first connecting piece 10 is a hexagonal prism structure. In this way, when the first connecting piece 10 and the first pipe to be connected are installed, it is convenient for the installer to use a wrench to fix the first connecting piece 10 on the first pipe to be connected. In the actual installation process, the first pipe to be connected can be the water inlet end of the plate heat exchanger or the water inlet end of the electric heater, and the second pipe to be connected can be a copper pipe. Through the setting of the pipe joint structure, the copper pipe can be sealed and connected to the plate heat exchanger, or the copper pipe can be sealed and connected to the electric heater, thereby ensuring the sealing performance of the hydraulic module pipeline.
[0032] The connecting hole 11 is circular in shape, that is, the inner wall of the first connecting member 10 is a circumferential surface, and the limiting step 12 is arranged to protrude circumferentially from the circumferential surface so that the inner diameter of the limiting step 12 is smaller than the inner diameter of the first connecting member 10. In this embodiment, the limiting step 12 can also be integrally arranged with the first connecting member 10 to ensure the stability of the pipe joint structure.
[0033] See also Figure 3 and Figure 4The second connector 20 may be a copper joint, and the second connector 20 is annular in structure. The annular protrusion 21 is coaxially arranged with the second connector 20. The outer diameter of the second connector 20 is slightly smaller than the inner diameter of the limiting step 12, so that one end of the second connector 20 can pass through the middle of the limiting step 12 and be exposed to the connecting hole 11, and the outer diameter of the annular protrusion 21 is slightly smaller than the inner diameter of the first connector 10, so that the annular protrusion 21 can be installed in the connecting hole 11 and abut against the limiting step 12. In this embodiment, the annular protrusion 21 can be integrally arranged with the second connector 20 to ensure the stability of the connection between the annular protrusion 21 and the second connector 20.
[0034] When the first connecting member 10 and the second connecting member 20 are assembled, the second connecting member 20 is inserted into the connecting hole 11 from the end of the connecting hole 11 where the limiting step 12 is not provided, until the annular protrusion 21 abuts against the limiting step 12. At this time, one end of the second connecting member 20 passes through the limiting step 12 and is exposed in the connecting hole 11, so that the second connecting member to be connected can be connected to the second connecting member 20.
[0035] In some embodiments, an anti-loosening material, such as an anti-loosening liquid, is provided on the limiting step 12 to increase the friction on the surface of the limiting step 12, so that relative rotation between the limiting step 12 and the annular protrusion 21 is not easy to occur, thereby improving the anti-loosening performance of the adapter structure.
[0036] In some embodiments, see Figure 2 , the second connecting member 20 is welded to the second pipe to be connected; and / or, the inner wall of the first connecting member 10 is provided with an internal thread 13, and the first pipe to be connected is provided with an external thread, and the internal thread 13 cooperates with the external thread to enable the first connecting member 10 to be threadedly connected to the first pipe to be connected.
[0037] It is understandable that the welding method used to connect the second pipe to be connected to the second connecting piece 20 not only has good sealing performance, but also has a fast assembly speed. The limiting step 12 is set at the end of the internal thread 13. Through the cooperation of the internal thread 13 and the external thread, the first connecting piece 10 and the first pipe to be connected can be detachably connected, which is convenient for replacing or repairing the pipe joint structure.
[0038] Optionally, in one embodiment, see Figure 2The limiting step 12 has an anti-loosening tooth surface 121, and the annular protrusion 21 can abut against the anti-loosening tooth surface 121. It can be understood that, through the design of the anti-loosening tooth surface 121, during the process of tightening the first connecting member 10, the contact between the annular protrusion 21 and the anti-loosening tooth surface 121 can play a good anti-loosening effect on the second connecting member 20; at the same time, after the pipe joint structure is installed, when the vibration generated during the operation of the trigeneration heat pump system and the water flow inside the pipeline cause an impact on the pipe joint structure, due to the setting of the anti-loosening tooth surface 121, the annular protrusion 21 and the limiting step 12 are not easy to rotate, thereby ensuring the sealing performance of the pipe joint structure.
[0039] For further information, see Figure 2 , a plurality of first saw teeth 122 are provided on the anti-loosening tooth surface 121, and the plurality of first saw teeth 122 are arranged in a stepped ring shape, and the tooth surface of each first saw tooth 122 is an inclined surface. In this embodiment, the tooth surface of each first saw tooth 122 has a certain downward inclination, and the plurality of first saw teeth 122 are arranged around the end surface of the limiting step 12, so that the plurality of first saw teeth 122 contact with the annular protrusion 21 to play an anti-loosening effect, thereby reducing the circumferential displacement of the second connecting member 20 in the connecting hole 11.
[0040] Furthermore, a plurality of second saw teeth are provided on one side of the annular protrusion 21 facing the limiting step 12. The plurality of second saw teeth are arranged in a stepped ring shape, and the tooth surface of each second saw tooth is a slope. The inclination direction of the plurality of first saw teeth 122 is opposite to the inclination direction of the plurality of second saw teeth.
[0041] It is understandable that the tooth surface of each second sawtooth has a certain upward inclination, and the plurality of second sawtooths are arranged around the side of the annular protrusion 21 facing the limiting step 12, so that the first sawtooth 122 and the second sawtooth are matched one by one to constrain. When the pipe joint structure is assembled, the first pipe to be connected is pressed in the axial direction, so that the limiting step 12 is in close contact with the annular protrusion 21, which is conducive to preventing the second connector 20 from being displaced in the circumferential and axial directions.
[0042] Optionally, in one embodiment, see Figure 1 , Figure 3 and Figure 5 The pipe joint structure also includes a gasket 30, which has a first end face 31 and a second end face 32. The gasket 30 is sleeved on the outer peripheral wall of the second connecting member 20 so that the first end face 31 abuts against the side of the annular protrusion 21 facing away from the limiting step 12, and the second end face 32 abuts against the first pipe to be connected.
[0043] For details, please refer to Figure 5The gasket 30 has a circular ring structure, and the inner diameter of the gasket 30 is slightly larger than the outer diameter of the second connecting member 20, so that the gasket 30 can be sleeved on the outer peripheral wall of the second connecting member 20, and the outer diameter of the gasket 30 is slightly smaller than the outer diameter of the first connecting member 10, so that the gasket 30 can be smoothly installed in the interior of the first connecting member 10.
[0044] The pipe joint structure provided by the present application is achieved by installing one end of the second connecting member 20 in the first connecting member 10 so that the annular protrusion 21 abuts against the limiting step 12, and sleeves the gasket 30 on the outer circumferential wall of the second connecting member 20. When the first pipe to be connected is tightened with the first connecting member 10, since the gasket 30 and the first pipe to be connected are both annular, uniform force is ensured between the first pipe to be connected and the gasket 30. At the same time, since the first end face 31 abuts against the annular protrusion 21 and the second end face 32 abuts against the first pipe to be connected, the inner circumference of the gasket 30 is sleeved on the second connecting member 20, so that the gasket 30 can only expand radially outward after being squeezed by the first pipe to be connected, ensuring that the outer circumference of the gasket 30 is in closer contact with the inner circumferential wall of the first connecting member 10, thereby improving the sealing performance of the pipe joint structure, avoiding water leakage in the pipe joint structure, and ensuring safe use.
[0045] The compression amount of the gasket 30 can be 25%, and the hardness of the gasket 30 can be between 70-75HV, for example, the hardness of the gasket 30 is 71HV, 72HV, 73HV or 74HV. In this way, when the first pipe to be connected to the first connecting member 10 is threadedly connected, as the first connecting member 10 rotates, the end of the first pipe to be connected can axially squeeze the second end face 32 of the gasket 30, thereby making the gasket 30 more easily deformed in the radial direction. At this time, the outer periphery of the gasket 30 is more tightly connected to the inner circumferential wall of the first connecting member 10, and the inner periphery of the gasket 30 is more tightly connected to the second connecting member 20, thereby improving the sealing performance of the pipe joint structure.
[0046] Optionally, in one embodiment, a rotation stop is provided between the gasket 30 and the second connector 20, and the rotation stop is used to prevent the gasket 30 from rotating. It is understandable that since the first pipe to be connected to the first connector 10 is threadedly connected, the gasket 30 may be displaced or even fall off during the rotation of the first connector 10. When the gasket 30 is displaced, the sealing performance of the pipe joint structure will be affected, resulting in water leakage in the pipe joint structure; and when the gasket 30 falls off, the installer needs to remove the first connector 10 and reinstall the gasket 30, which reduces the installation efficiency of the pipe joint structure.
[0047] To this end, in this embodiment, a stopper is provided to limit the gasket 30 in the circumferential and axial directions, thereby preventing the gasket 30 from rotating relative to the second connecting member 20, and also preventing the gasket 30 from falling off the second connecting member 20, which is beneficial to ensuring the sealing performance of the pipe joint structure and improving the installation efficiency of the pipe joint structure.
[0048] For further information, see Figure 3-Figure 6 The anti-rotation portion includes a boss 22 arranged on the outer peripheral wall of the second connecting member 20, and the inner peripheral wall of the gasket 30 is provided with a groove 33, and the boss 22 is installed in the groove 33.
[0049] Specifically, the shapes and sizes of the boss 22 and the groove 33 are adapted to allow the boss 22 to be smoothly inserted into the groove 33. The cooperation between the boss 22 and the groove 33 can limit the rotation of the gasket 30 relative to the second connecting member 20, while preventing the gasket 30 from falling off the second connecting member 20, thereby ensuring the sealing performance of the pipe joint structure. In addition, this method has a simple structure and is easy to produce and design.
[0050] For further information, see Figure 5 and Figure 6 The number of bosses 22 and the number of grooves 33 are two, and the two grooves 33 are arranged at intervals along the circumferential direction of the gasket 30, and the bosses 22 and the grooves 33 are arranged in a one-to-one correspondence.
[0051] In this embodiment, each groove 33 extends circumferentially on the inner circumferential wall of the gasket 30 and forms a roughly semicircular groove 33. The two grooves 33 are symmetrically arranged relative to a virtual plane passing through the axis of the gasket 30. The number of bosses 22 is also two, and the shape and size of the bosses 22 are adapted to the grooves 33, so as to ensure that the bosses 22 and the grooves 33 are matched one by one. The above arrangement is conducive to ensuring the stability of the gasket 30, so that the gasket 30 and the second connecting member 20 are better fixed in the circumferential direction, which can not only prevent the gasket 30 from rotating relative to the second connecting member 20, but also ensure that the gasket 30 is evenly stressed, further improving the sealing effect of the second connecting member 20 structure.
[0052] Optionally, in one embodiment, see Figure 5 and Figure 6 A rounded structure 34 is provided at the first end surface 31 , and the groove 33 is provided close to the side where the rounded structure 34 is located.
[0053] It can be understood that the gasket 30 has rounded corners on the inner and outer edges of the first end face 31. The rounded corners are arranged to help remove burrs on the gasket 30 caused by processing, reduce the sharpness of the product, and prevent the gasket 30 from cutting the installer. At the same time, it can also release stress, reduce deformation of parts, and prevent cracks in the gasket 30; and because the gasket 30 needs to be sleeved on the outer wall of the second connecting member 20, the rounded corners are arranged in this embodiment. During assembly, the side of the gasket 30 with the rounded corner structure 34 is assembled with the second connecting member 20, which is beneficial to improving the assembly efficiency of the gasket 30; in addition, by arranging the groove 33 close to the side of the rounded corner structure 34, it can play a fool-proof effect when the groove 33 is assembled with the boss 22, thereby improving the assembly efficiency of the pipe joint structure.
[0054] The embodiment of the present application also provides a heat pump system, which includes a pipe joint structure. The specific structure of the pipe joint structure refers to the above embodiment. Since the heat pump system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.
[0056] The pipe joint structure provided in the embodiment of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A pipe joint structure, used to connect a first pipe to be connected and a second pipe to be connected, characterized in that: The pipe joint structure comprises: A first connecting member connected to the first pipe to be connected, wherein a connecting hole is provided in the first connecting member, the connecting hole passes through the first connecting member, and a limiting step is provided on the inner side of one end of the connecting hole; A second connecting piece connected to the second pipe to be connected, wherein an annular protrusion is provided on the outer periphery of the second connecting piece; During installation, one end of the second connecting member is inserted into the connecting hole, and the other end is exposed from the connecting hole, and the annular protrusion is in contact with the limiting step; When the annular protrusion and the limiting step are in abutting state, and the annular protrusion rotates relative to the limiting step, the limiting step applies a force on the annular protrusion that is opposite to the rotation direction of the annular protrusion.
2. The pipe joint structure according to claim 1, characterized in that: The limiting step has an anti-loosening tooth surface, and the annular protrusion can abut against the anti-loosening tooth surface.
3. The pipe joint structure according to claim 2, characterized in that: A plurality of first saw teeth are arranged on the anti-loosening tooth surface. The plurality of first saw teeth are arranged in a stepped ring shape, and the tooth surface of each of the first saw teeth is an inclined surface.
4. The pipe joint structure according to claim 3, characterized in that: A plurality of second saw teeth are provided on one side of the annular protrusion facing the limiting step. The plurality of second saw teeth are arranged in a stepped ring shape, and the tooth surface of each second saw tooth is a slope. The inclination direction of the plurality of first saw teeth is opposite to the inclination direction of the plurality of second saw teeth.
5. The pipe joint structure according to claim 1, characterized in that: The pipe joint structure also includes a gasket having a first end face and a second end face, and the gasket is sleeved on the outer peripheral wall of the second connecting member so that the first end face abuts against the side of the annular protrusion facing away from the limiting step, and the second end face abuts against the first pipe to be connected.
6. The pipe joint structure according to claim 5, characterized in that: A rotation-stopping portion is provided between the gasket and the second connecting member, and the rotation-stopping portion is used to prevent the gasket from rotating.
7. The pipe joint structure according to claim 6, characterized in that: The anti-rotation portion includes a boss arranged on the outer peripheral wall of the second connecting member, and the inner peripheral wall of the gasket is provided with a groove, and the boss is installed in the groove.
8. The pipe joint structure according to claim 7, characterized in that: The number of the bosses and the number of the grooves are two, the two grooves are arranged at intervals along the circumferential direction of the gasket, and the bosses and the grooves are arranged in a one-to-one correspondence.
9. The pipe joint structure according to claim 7, characterized in that: A rounded structure is provided at the first end surface, and the cutting groove is provided close to a side where the rounded structure is located.
10. A heat pump system, characterized in that: The invention comprises a pipe joint structure as claimed in any one of claims 1 to 9.