Automobile cooling water pipe joint assembly

Abstract

The invention relates to the technical field of automobile pipelines, and discloses an automobile cooling water pipe connector assembly which comprises an elastic corrugated pipe, the two ends of the elastic corrugated pipe are connected with first assembly pipes, and the ends, away from the elastic corrugated pipe, of the first assembly pipes are sleeved with second assembly pipes. The inner wall of the end, away from the elastic corrugated pipe, of the first assembly pipe and the surface of one end of the second assembly pipe each comprise a conical surface section, and a plurality of first sealing rings connected with the conical surface section of the first assembly pipe in an attached mode are nested on the conical surface section of the second assembly pipe. According to the automobile cooling water pipe joint assembly, the arranged elastic corrugated pipe and the two first assembly pipes are subjected to integrated extrusion molding, the two second assembly pipes are subjected to independent extrusion molding, subsequent assembly is conducted through assembly type connection, and segmented extrusion is also beneficial to reducing the mold opening difficulty and the mold manufacturing difficulty; and secondly, the sectional assembly type connection can meet the requirements for batch centralized assembly and independent replacement of a subsequent single structure.

Description

Technical Field

[0001] The invention relates to the technical field of automobile pipelines, in particular to an automobile cooling water pipe joint assembly. Background Art

[0002] Automotive pipelines are the vital arteries of a vehicle's operation, responsible for transporting various media such as fuel, lubricating oil, brake fluid, and coolant. Therefore, the quality of these pipelines is crucial to the vehicle's safety, reliability, and overall performance.

[0003] In recent years, with the further development of relevant technologies, some technical solutions for optimizing or improving automobile pipelines have been disclosed in the prior art. For example, the patent document with application number 202211737672.1 discloses "a low-permeability multi-layer composite cooling pipe, including a cooling pipe, which is formed by at least one layer of plastic injection molding and hot processing, and also includes a corrugated section connected to the cooling pipe, which is extruded into one piece through a mold to ensure dimensional consistency, and the connection stability between the corrugated section and the cooling pipe is high."

[0004] However, in actual situations, it is difficult and complicated to integrally mold the corrugated section of the cooling water pipe and the interface pipe head of the cooling water pipe, which greatly increases the production cost. Secondly, if the integrally molded cooling water pipe is damaged at any point during use, the cooling water pipe needs to be replaced as a whole, and the use and maintenance costs are also very high. Summary of the Invention

[0005] Technical problems solved In view of the deficiencies in the prior art, the present invention provides an automobile cooling water pipe joint assembly, which solves the problems raised in the above background technology.

[0006] Technical Solution To achieve the above object, the present invention provides the following technical solution: an automobile cooling water pipe joint assembly, comprising an elastic bellows, both ends of the elastic bellows are connected to a first assembly pipe, and an end of the first assembly pipe away from the elastic bellows is sheathed with a second assembly pipe; The inner wall of the end of the first assembly tube away from the elastic bellows and the surface of one end of the second assembly tube both include a conical section, and the conical section of the second assembly tube is embedded with a plurality of first sealing rings that are closely connected to the conical section of the first assembly tube; The other end of the second assembly pipe is sleeved with a joint pipe, and a composite sleeve is sleeved between the other end of the second assembly pipe and one end of the joint pipe, and a second sealing ring is nested in the connection gap between the other end of the second assembly pipe and one end of the joint pipe.

[0007] Preferably, the elastic bellows, the two first assembly tubes, and the two second assembly tubes are all double-layer structures, which fully ensures the structural strength and pressure resistance effect, and the elastic bellows, the two first assembly tubes, and the two second assembly tubes are made of the same material, which is convenient for obtaining raw materials and batch materials, and is conducive to controlling the use cost. The inner layer is made of polyamide material and the outer layer is made of polypropylene material. The two first assembly tubes and the elastic bellows are extruded as a whole, which ensures the assembly production efficiency while ensuring the structural strength of the first assembly tube and the elastic bellows assembly; The elastic bellows has the structural characteristics of reciprocating expansion or contraction, which facilitates the giving way during the connection process with other components in the car, improves the installation efficiency and reduces the efficiency of structural interference. The elastic bellows is arranged on the same central axis as the two first assembly tubes to ensure the conveying effect.

[0008] Preferably, the inner wall of one end of the first assembly tube away from the elastic bellows and the surface of one end of the second assembly tube both include a cylindrical surface segment, which facilitates the subsequent opening of the threaded structure and reduces the difficulty of secondary processing. The cylindrical surface segment of the first assembly tube is provided with a first internal thread, and the cylindrical surface segment of the second assembly tube is provided with a first external thread. The first assembly tube and the second assembly tube can be detachably installed by spirally engaging the first internal thread and the first external thread, thereby improving the flexibility of installation or disassembly and thereby ensuring the subsequent assembly installation efficiency of the overall device.

[0009] Preferably, the number of first sealing rings provided between the conical surface section of the inner wall of the first assembly tube and the corresponding second assembly tube is specifically set to two, thereby utilizing the two first sealing rings to achieve a double sealing effect on the connection gap between the first assembly tube and the second assembly tube, and the two first sealing rings are arranged vertically along the conical surface section of the second assembly tube, thereby achieving a staged leak-proof sealing effect; Two arc-shaped relief ring grooves arranged vertically in the vertical direction are provided on the conical surface section of the first assembly tube. The two arc-shaped relief ring grooves are respectively fitted with the outer ring structures of the two first sealing rings. Thus, the arc-shaped relief ring grooves are connected to the first sealing rings by fitting, thereby further increasing the connection sealing area between the first assembly tube and the first sealing ring, and further improving the sealing effect.

[0010] Preferably, the composite sleeve is clamped to the outer side of the other end of the second assembly pipe, and the inner wall of the composite sleeve itself is provided with a second internal thread, and the surface of one end of the joint pipe is provided with a second external thread, and the composite sleeve and the joint pipe can be detachably installed by spirally engaging the second internal thread and the second external thread, thereby improving the installation efficiency of the second assembly pipe and the joint pipe, and optimizing and expanding the subsequent use of the cooling water pipe composed of the elastic bellows, the two first assembly pipes and the two second assembly pipes.

[0011] Preferably, a yield annular space is formed between the two conical surface segments in the fitted assembly position, and the yield annular space forms a first glue-filling space and a second glue-filling space respectively under the separation of the corresponding two first sealing rings. Two T-shaped holes are provided on the surface of the first assembly tube, and the two T-shaped holes are respectively aligned with the first glue-filling space and the second glue-filling space and are spatially communicated. The two T-shaped holes serve as opening spaces of the first glue-filling space and the second glue-filling space, respectively, so that when there is a higher demand for sealing and installation strength in the future, glue can be injected into the first glue-filling space and the second glue-filling space through the two T-shaped holes, and then two annular rubber rings are formed in the first glue-filling space and the second glue-filling space. Compared with the two first sealing rings, in addition to further improving the connection strength between the first assembly tube and the second assembly tube, a double sealing effect is achieved for the connection gap between the first assembly tube and the second assembly tube. The port of the T-shaped hole away from the central axis of the first assembly tube is threadedly connected with a sealing plug block, one end of the sealing plug block is provided with a cross groove, and the sealing plug block is completely inserted into the corresponding T-shaped hole. The sealing plug block serves as an auxiliary sealing structure and can assist in sealing the T-shaped hole after use, thereby ensuring the complete effect of the second assembly tube structure.

[0012] Preferably, the composite sleeve comprises two symmetrical sleeve bodies, and the second internal thread is formed on the inner walls of the two sleeve bodies in a manner of being evenly divided into two sections at the front and rear. One of the sleeve bodies is provided with limiting screw holes in the front ends on both sides, and the other sleeve body is provided with through countersunk holes on both sides, and the countersunk holes are equipped with limiting screws that can be threadedly connected to the corresponding limiting screw holes. The limiting threads are completely installed in the corresponding countersunk holes, thereby transforming the composite sleeve into a symmetrical double-piece structure, thereby improving the assembly and use flexibility of the composite sleeve and the second assembly tube.

[0013] Preferably, the inner walls of the two sleeve bodies are each provided with an annular groove, and the two annular grooves form an annular easing groove aligned and sleeved outside the sleeve gap between the second assembly tube and the joint tube, and the two annular grooves are each sleeved with an arc-shaped spring sheet, and the two arc-shaped spring sheets respectively fit and cover the front and rear ends of the sleeve gap between the second assembly tube and the joint tube, and the two opposing arc-shaped spring sheets serve as a relatively elastic structure, which can perform centering and extrusion adjustment on the end of the second assembly tube and the end of the joint tube during the spiral combination process of the joint tube and the composite sleeve, thereby reducing the combined misalignment spacing value between the end of the second assembly tube and the end of the joint tube, and thereby reducing the probability of leakage when the second assembly tube and the joint tube are used in combination from the structural assembly aspect.

[0014] Preferably, a rubber strip is fixed to the middle surface of the two arc-shaped spring sheets, and the annular structure formed by the two rubber strips can be filled in the gap between the second assembly tube and the joint tube. The rubber strip and the corresponding arc-shaped spring sheet are used synchronously to achieve a flexible structure filling and sealing effect on the connection gap between the end of the second assembly tube and the end of the joint tube.

[0015] Preferably, the method for preparing the automobile cooling water pipe joint assembly comprises the following steps: The first step is to prepare the materials and perform pretreatment; In the second step, the pretreated inner layer raw material and the outer layer raw material are extruded through an extruder; In the third step, during the extrusion process, the two first assembly tubes and the elastic bellows are integrally extruded, and the two second assembly tubes are extruded separately, thereby providing structural conditions for subsequent assembly connection; The fourth step is to respectively fit the two first assembly pipes and the elastic bellows integrally formed assemblies with the two second assembly pipes to form the automobile cooling water pipe body.

[0016] Beneficial effects The present invention provides an automobile cooling water pipe joint assembly, which has the following beneficial effects: 1. The automobile cooling water pipe joint assembly is provided with an elastic bellows and two first assembly pipes that are integrally extruded, and two second assembly pipes that are independently extruded and subsequently assembled through assembly-type connections. The segmented extrusion is also conducive to reducing the difficulty of mold opening and mold making, reducing the mold manufacturing cost and production cost. Secondly, the segmented assembly-type connection can meet the needs of batch centralized assembly and subsequent independent replacement of a single structure, reducing the cost of subsequent maintenance.

[0017] 2. The automobile cooling water pipe joint assembly is provided with two auxiliary first sealing rings and two T-shaped holes for connection between the first assembly pipe and the second assembly pipe, which can achieve a detachable double sealing connection or a non-detachable quadruple sealing connection, thereby meeting different actual usage requirements.

[0018] 3. The automobile cooling water pipe joint assembly is provided with a composite sleeve as an assembling structure, and its own structure can be reciprocatedly installed and disassembled to ensure the assembly efficiency with the second assembly pipe, and the two relative arc-shaped spring leaves in the composite sleeve serve as a relatively elastic structure. During the spiral assembly process of the joint pipe and the composite sleeve, the end of the second assembly pipe and the end of the joint pipe can be centered and squeezed and adjusted, thereby reducing the combined misalignment spacing value between the end of the second assembly pipe and the end of the joint pipe, and then reducing the probability of leakage when the second assembly pipe and the joint pipe are used in combination from the perspective of structural assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 3 It is a front view schematic diagram of the structure of the present invention; Figure 4 It is a rear view schematic diagram of the structure of the present invention; Figure 5 It is a cross-sectional schematic diagram of the first assembly tube of the structure of the present invention; Figure 6 It is a cross-sectional schematic diagram of the structural composite sleeve of the present invention; Figure 7 The structure of the present invention Figure 6 A magnified schematic diagram of point A in the middle; Figure 8 It is a left side schematic diagram of the sealing plug of the structure of the present invention; Figure 9 It is a cross-sectional schematic diagram of the first glue-filling space of the structure of the present invention.

[0020] In the figure: 1. elastic bellows; 2. first assembly tube; 3. second assembly tube; 4. first sealing ring; 5. joint tube; 6. composite sleeve; 61. sleeve body; 62. countersunk hole; 63. limiting screw hole; 64. annular groove; 65. arc-shaped spring sheet; 66. rubber strip; 7. second sealing ring; 8. first glue-filling space; 9. second glue-filling space; 10. T-hole; 11. sealing plug. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0022] See also Figures 1-6 A vehicle cooling water pipe joint assembly includes an elastic bellows 1, both ends of which are connected to a first assembly pipe 2, an end of the first assembly pipe 2 away from the elastic bellows 1 being sheathed with a second assembly pipe 3, an inner wall of the end of the first assembly pipe 2 away from the elastic bellows 1 and a surface of one end of the second assembly pipe 3 both including a tapered section, and a plurality of first sealing rings 4 nested on the tapered section of the second assembly pipe 3 and fittedly connected to the tapered section of the first assembly pipe 2; The number of first sealing rings 4 provided between the inner wall conical section of the first assembly tube 2 and the corresponding second assembly tube 3 is specifically set to two, thereby utilizing the two first sealing rings 4 to achieve a double sealing effect on the connection gap between the first assembly tube 2 and the second assembly tube 3, and the two first sealing rings 4 are arranged vertically along the conical section of the second assembly tube 3, thereby achieving a staged leak-proof sealing effect; The conical surface section of the first assembly tube 2 is provided with two arc-shaped relief ring grooves arranged vertically in the vertical direction. The two arc-shaped relief ring grooves are respectively fitted with the outer ring structures of the two first sealing rings 4. Thus, the arc-shaped relief ring grooves are used to fit the first sealing rings 4, thereby further increasing the connection sealing area between the first assembly tube 2 and the first sealing rings 4 and further improving the sealing effect. The other end of the second assembly tube 3 is sleeved with a joint tube 5, and a composite sleeve 6 is sleeved between the other end of the second assembly tube 3 and one end of the joint tube 5. A second sealing ring 7 is embedded in the connection gap between the other end of the second assembly tube 3 and one end of the joint tube 5; The elastic bellows 1, the two first assembly tubes 2, and the two second assembly tubes 3 are all double-layer structures, which fully ensures the structural strength and pressure resistance. The elastic bellows 1, the two first assembly tubes 2, and the two second assembly tubes 3 are made of the same material, which is convenient for obtaining raw materials and batch materials, and is conducive to controlling the use cost. The inner layer is made of polyamide material and the outer layer is made of polypropylene material. The two first assembly tubes 2 and the elastic bellows 1 are extruded as a whole, ensuring the assembly production efficiency while ensuring the structural strength of the assembly of the first assembly tube 2 and the elastic bellows 1. The elastic bellows 1 has a structural feature of reciprocating expansion or contraction, which is convenient for making way during the connection process with other components in the car, improving the installation efficiency while reducing the efficiency of structural interference. The elastic bellows 1 and the two first assembly tubes 2 are arranged on the same central axis to ensure the conveying use effect; The inner wall of the end of the first assembly tube 2 away from the elastic bellows 1 and the surface of one end of the second assembly tube 3 both include cylindrical surface sections, which facilitate the subsequent opening of the threaded structure and reduce the difficulty of secondary processing. The cylindrical surface section of the first assembly tube 2 is provided with a first internal thread, and the cylindrical surface section of the second assembly tube 3 is provided with a first external thread. The first assembly tube 2 and the second assembly tube 3 can be detachably installed by spirally engaging the first internal thread and the first external thread, thereby improving the flexibility of installation or disassembly and thereby ensuring the subsequent assembly installation efficiency of the overall device.

[0023] During use, the assembly formed by the elastic bellows 1 and the two first assembly tubes 2 and the second assembly tube 3 are produced in sections by extrusion and then assembled and connected in a unified manner. The specific operation is as follows: One end of the first assembly tube 2 is fitted onto the inner side of one end of the second assembly tube 3, and as the fitting depth of the first assembly tube 2 and the second assembly tube 3 increases, the two first sealing rings 4 will perform double sealing treatment on the connection gap between the first sealing ring 4 and the first assembly tube 2 and the second assembly tube 3, fully ensuring the sealing effect of the connection and assembly of the first assembly tube 2 and the second assembly tube 3, and as the fitting depth of the first assembly tube 2 and the second assembly tube 3 further increases, the first internal thread provided in the first assembly tube 2 will be spirally engaged with the first external thread correspondingly provided on the surface of the second assembly tube 3, thereby ensuring the connection strength of the first assembly tube 2 and the second assembly tube 3. After the two first assembly tubes 2 are respectively assembled with the two second assembly tubes 3, the elastic bellows 1 and the two first assembly tubes 2 and the two second assembly tubes 3 will form the cooling water pipe body.

[0024] See also Figure 1-Figure 4 、 Figure 9 The composite sleeve 6 is clamped on the outer side of the other end of the second assembly pipe 3, and the inner wall of the composite sleeve 6 itself is provided with a second internal thread, and the surface of one end of the joint pipe 5 is provided with a second external thread, and the composite sleeve 6 and the joint pipe 5 can be detachably installed by spirally engaging the second internal thread and the second external thread, thereby improving the installation efficiency of the second assembly pipe 3 and the joint pipe 5, and optimizing and expanding the subsequent use of the cooling water pipe composed of the elastic bellows 1, the two first assembly pipes 2 and the two second assembly pipes 3; A yield annular space is formed between the two conical surface segments in the fitted assembly position, and the yield annular space forms a first glue-filling space 8 and a second glue-filling space 9 respectively under the separation of the corresponding two first sealing rings 4. Two T-shaped holes 10 are provided on the surface of the first assembly tube 2. The two T-shaped holes 10 are aligned with the first glue-filling space 8 and the second glue-filling space 9 respectively and are spatially communicated. The two T-shaped holes 10 serve as opening spaces of the first glue-filling space 8 and the second glue-filling space 9 respectively, so that when there is a higher demand for sealing and installation strength in the future, glue can be injected into the first glue-filling space 8 and the second glue-filling space 9 through the two T-shaped holes 10, and then two annular rubber rings are formed in the first glue-filling space 8 and the second glue-filling space 9. Compared with the two first sealing rings 4, in addition to further improving the connection strength between the first assembly tube 2 and the second assembly tube 3, a double sealing effect is achieved for the connection gap between the first assembly tube 2 and the second assembly tube 3. A sealing plug 11 is threadedly connected to the port of the T-shaped hole 10 away from the central axis of the first assembly tube 2. A cross groove is provided in one end of the sealing plug 11, and the sealing plug 11 is completely inserted into the corresponding T-shaped hole 10. The sealing plug 11 serves as an auxiliary sealing structure, which can assist in sealing the T-shaped hole 10 after use, thereby ensuring the integrity of the structure of the second assembly tube 3.

[0025] During use, considering the actual situation that there is a higher demand for sealing and installation strength, the first assembly tube 2 and the second assembly tube 3 after assembly and connection are reassembled through the provided first glue filling space 8, the second glue filling space 9 and the two related T-shaped holes 10. The specific operation is as follows: Glue is injected into the first glue-filling space 8 and the second glue-filling space 9 through the two T-shaped holes 10, thereby forming two annular rubber rings in the first glue-filling space 8 and the second glue-filling space 9, thereby producing a structural effect similar to that of two first sealing rings 4. In other words, in addition to further improving the connection strength between the first assembly tube 2 and the second assembly tube 3, the connection gap between the first assembly tube 2 and the second assembly tube 3 is also double-sealed. After the two rubber rings are formed by the injection, the two sealing plugs 11 are respectively threadedly connected to the inside of the two T-shaped holes 10, thereby filling the excess parts of the two T-shaped holes 10 to ensure the integrity of the overall structure of the second assembly pipe 3.

[0026] See also Figure 1-Figure 4 、 Figure 7-Figure 8 The composite sleeve 6 includes two symmetrical sleeve bodies 61, and the second internal thread is opened on the inner wall of the two sleeve bodies 61 in a manner of being evenly divided into two sections at the front and rear; Limit screw holes 63 are provided in the front ends of both sides of one sleeve body 61, and through countersunk holes 62 are provided in both sides of the other sleeve body 61. Limit screws that can be threadedly connected with the corresponding limit screw holes 63 are installed in the countersunk holes 62. The limit screws are completely installed in the corresponding countersunk holes 62, thereby transforming the composite sleeve 6 into a symmetrical double-piece structure, thereby improving the assembly and use flexibility of the composite sleeve 6 and the second assembly tube 3; The inner walls of the two sleeve bodies 61 are each provided with an annular groove 64, and the two annular grooves 64 form an annular easing groove aligned with the outside of the fitting gap between the second assembly tube 3 and the joint tube 5. The two annular grooves 64 are each provided with an arc-shaped spring piece 65, and the two arc-shaped spring pieces 65 respectively fit the front and rear ends of the fitting gap between the second assembly tube 3 and the joint tube 5. The two opposing arc-shaped spring pieces 65 serve as a relatively elastic structure, and can perform centering and extrusion adjustment on the end of the second assembly tube 3 and the end of the joint tube 5 during the spiral combination process of the joint tube 5 and the composite sleeve 6. In order to reduce the combined misalignment spacing between the end of the second assembly tube 3 and the end of the joint tube 5, the probability of leakage when the second assembly tube 3 and the joint tube 5 are used in combination is reduced from the perspective of structural assembly. A rubber strip 66 is fixed to the middle surface of the two arc-shaped spring sheets 65. The annular structure formed by the two rubber strips 66 can be filled in the set gap between the second assembly tube 3 and the joint tube 5. The rubber strip 66 and the corresponding arc-shaped spring sheet 65 are used synchronously to perform a flexible structural filling and sealing effect on the connection gap between the end of the second assembly tube 3 and the end of the joint tube 5.

[0027] During use, considering the assembly efficiency of the composite sleeve 6 and the second assembly tube 3, the composite sleeve 6 is provided as two symmetrical sleeve bodies 61. After the two sleeve bodies 61 are fitted onto the second assembly tube 3 and assembled, they are assembled and connected by positioning screws and countersunk holes 62 and limiting screw holes 63 respectively provided in the two sleeve bodies 61 to ensure the structural strength of the composite sleeve 6. Then, the end of the joint pipe 5 is assembled with the other end of the second assembly pipe 3, and the second sealing ring 7 fills and seals the assembly gap between the two ends to preliminarily ensure the connection and sealing effect of the joint pipe 5 and the second assembly pipe 3. Then, the composite sleeve 6 is moved so that the second internal thread in the composite sleeve 6 is spirally engaged with the second external thread on the joint pipe 5, thereby locking and limiting the joint pipe 5 and the second assembly pipe 3; And during the spiral combination process of the joint pipe 5 and the composite sleeve 6, the two arc-shaped spring pieces 65 rotate synchronously with their respective corresponding sleeve bodies 61, and then can perform centering and squeezing adjustment on the end of the second assembly pipe 3 and the end of the joint pipe 5, thereby reducing the combined misalignment spacing value between the end of the second assembly pipe 3 and the end of the joint pipe 5, and then reducing the probability of leakage when the second assembly pipe 3 and the joint pipe 5 are used in combination from the structural assembly aspect. A rubber strip 66 is fixed to the middle surface of the two arc-shaped spring pieces 65. The annular structure formed by the two rubber strips 66 can be filled in the set gap between the second assembly pipe 3 and the joint pipe 5. The rubber strip 66 and the corresponding arc-shaped spring piece 65 are used synchronously, and then the flexible structure filling and sealing effect is achieved on the connection gap between the end of the second assembly pipe 3 and the end of the joint pipe 5.

[0028] See also Figure 1-Figure 4 The preparation method of the automobile cooling water pipe joint assembly comprises the following steps: The first step is to prepare the materials and perform pretreatment; The two selected raw materials are cleaned, dried, crushed and screened to obtain granular raw materials of uniform size and meeting the use requirements; In the second step, the pretreated inner layer raw material and the outer layer raw material are extruded through an extruder; In the third step, during the extrusion process, the two first assembly tubes 2 and the elastic bellows 1 are extruded integrally, and the two second assembly tubes 3 are extruded separately, thereby providing structural conditions for subsequent assembly connection. The segmented extrusion is also conducive to reducing the difficulty of mold opening and mold manufacturing, and reducing the mold manufacturing cost and production cost; In the fourth step, the two first assembly pipes 2 and the elastic bellows 1 integrally formed assemblies are respectively assembled with the two second assembly pipes 3 to form the main body of the automobile cooling water pipe. The segmented assembly connection can meet the needs of batch centralized assembly and subsequent independent replacement of a single structure, reducing the cost of subsequent maintenance.

[0029] In summary, the two first assembly tubes 2 and the elastic bellows 1 are extruded as a whole, and the two second assembly tubes 3 are extruded separately, which can provide convenient and flexible structural conditions for subsequent assembly connections, and the segmented extrusion is also conducive to reducing the difficulty of mold opening and mold making, reducing the manufacturing cost of the mold and production cost. Secondly, the segmented assembly connection can meet the needs of batch centralized assembly and subsequent independent replacement of a single structure, reducing the cost of subsequent maintenance.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automobile cooling water pipe joint assembly, comprising an elastic bellows (1), characterized in that: Both ends of the elastic bellows (1) are connected to a first assembly tube (2), and an end of the first assembly tube (2) away from the elastic bellows (1) is sheathed with a second assembly tube (3); The inner wall of one end of the first assembly tube (2) away from the elastic bellows (1) and the surface of one end of the second assembly tube (3) both include a conical section, and a plurality of first sealing rings (4) are nested on the conical section of the second assembly tube (3) and are in close contact with the conical section of the first assembly tube (2); The other end of the second assembly tube (3) is sleeved with a joint tube (5), and a composite sleeve (6) is sleeved between the other end of the second assembly tube (3) and one end of the joint tube (5), and a second sealing ring (7) is embedded in the connection gap between the other end of the second assembly tube (3) and one end of the joint tube (5).

2. The automobile cooling water pipe joint assembly according to claim 1, characterized in that: The elastic bellows (1), the two first assembly tubes (2), and the two second assembly tubes (3) are all double-layer structures, and the elastic bellows (1), the two first assembly tubes (2), and the two second assembly tubes (3) are made of the same material, wherein the inner layer is made of polyamide material and the outer layer is made of polypropylene material, and the two first assembly tubes (2) and the elastic bellows (1) are extruded integrally; The elastic bellows (1) has a structural characteristic of reciprocating expansion or contraction, and the elastic bellows (1) and the two first assembly tubes (2) are arranged on the same central axis.

3. The automobile cooling water pipe joint assembly according to claim 1, characterized in that: The inner wall of one end of the first assembly tube (2) away from the elastic bellows (1) and the surface of one end of the second assembly tube (3) both include cylindrical surface sections, a first internal thread is provided on the cylindrical surface section of the first assembly tube (2), and a first external thread is provided on the cylindrical surface section of the second assembly tube (3), and the first assembly tube (2) and the second assembly tube (3) can be detachably mounted by means of the spiral engagement of the first internal thread and the first external thread.

4. The automobile cooling water pipe joint assembly according to claim 1, characterized in that: The number of the first sealing rings (4) between the first assembly tube (2) and the second assembly tube (3) is specifically set to two, and the two first sealing rings (4) are arranged vertically on the conical surface section of the second assembly tube (3); Two arc-shaped relief ring grooves arranged vertically in the vertical direction are provided on the conical surface section of the first assembly tube (2), and the two arc-shaped relief ring grooves are respectively fitted with the outer ring structures of the two first sealing rings (4).

5. The automobile cooling water pipe joint assembly according to claim 1, characterized in that: The composite sleeve (6) is clamped to the outside of the other end of the second assembly tube (3), and the inner wall of the composite sleeve (6) itself is provided with a second internal thread. The surface of one end of the joint tube (5) is provided with a second external thread, and the composite sleeve (6) and the joint tube (5) can be detachably mounted in a spirally meshing manner through the second internal thread and the second external thread.

6. The automobile cooling water pipe joint assembly according to claim 4, characterized in that: A relief annular space is formed between the two conical surface segments in the sleeve assembly position, and the relief annular space is separated by the two corresponding first sealing rings (4) to form a first glue-filled space (8) and a second glue-filled space (9), respectively. Two T-shaped holes (10) are provided on the surface of the first assembly tube (2), and the two T-shaped holes (10) are aligned with the first glue-filled space (8) and the second glue-filled space (9) respectively and are spatially communicated. The end of the T-shaped hole (10) away from the central axis of the first assembly tube (2) is threadedly connected to a sealing plug (11), one end of the sealing plug (11) is provided with a cross groove, and the sealing plug (11) is completely fitted into the corresponding T-shaped hole (10).

7. The automobile cooling water pipe joint assembly according to claim 5, characterized in that: The composite sleeve (6) comprises two symmetrical sleeve bodies (61), and the second internal thread is formed on the inner walls of the two sleeve bodies (61) in a manner of being evenly divided into two sections at the front and rear. One sleeve body (61) has limiting screw holes (63) formed in the front ends of both sides, and the other sleeve body (61) has through-shaped countersunk holes (62) formed in both sides, and the countersunk holes (62) are fitted with limiting screws that can be threadedly connected to the corresponding limiting screw holes (63), and the limiting threads are completely fitted in the corresponding countersunk holes (62).

8. The automobile cooling water pipe joint assembly according to claim 7, characterized in that: The inner walls of the two sleeve bodies (61) are each provided with an annular groove (64), and the two annular grooves (64) form an annular relief groove aligned with and sleeved outside the sleeve gap between the second assembly tube (3) and the joint tube (5). The two annular grooves (64) are each sleeved with an arc-shaped spring piece (65), and the two arc-shaped spring pieces (65) respectively fit and cover the front and rear ends of the sleeve gap between the second assembly tube (3) and the joint tube (5).

9. The automobile cooling water pipe joint assembly according to claim 8, characterized in that: A rubber strip (66) is fixed to the middle surface of the two arc-shaped spring sheets (65), and the annular structure formed by the two rubber strips (66) can be filled in the sleeve gap between the second assembly tube (3) and the joint tube (5).

10. A method for preparing an automobile cooling water pipe joint assembly according to claim 2, characterized in that: The following steps are included: The first step is to prepare the materials and perform pretreatment; In the second step, the pretreated inner layer raw material and the outer layer raw material are extruded through an extruder; In the third step, during the extrusion process, the two first assembly tubes (2) and the elastic bellows (1) are integrally extruded, and the two second assembly tubes (3) are extruded separately, thereby providing structural conditions for subsequent assembly connection; In the fourth step, the two first assembly pipes (2) and the elastic bellows (1) integrally formed assemblies are respectively assembled with the two second assembly pipes (3) to form the automobile cooling water pipe body.

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