A composite sealing threaded elbow joint and its assembly process

Abstract

A composite sealing threaded elbow pipe joint, comprising an upper straight pipe joint and a lower elbow pipe joint, wherein the upper straight pipe joint comprises an upper disk body and an upper cylinder body, a through liquid inlet hole is provided in the middle of the upper disk body, the bottom surface of the upper disk body is vertically connected to the top of the upper cylinder body, a through upper column cavity is provided in the middle of the upper cylinder body, and the top of the upper column cavity is communicated with the liquid inlet hole; the lower elbow pipe joint comprises a connector and a liquid outlet pipe, a coaxial liquid outlet cavity is provided inside the liquid outlet pipe, the inner end of the liquid outlet pipe is connected to the side of the connector body, a concave connecting cavity is provided in the middle of the connector body, the cavity wall of the connecting cavity is connected to the side of the upper cylinder body inserted therein, and a cavity liquid hole communicated with the liquid outlet cavity is provided on the cavity wall. This design is not only suitable for drainage after a fuel vehicle is converted into an electric passenger vehicle, but also has a strong sealing and anti-leakage effect.

Description

Technical Field

[0001] The invention relates to a pipe joint, belonging to the field of vehicle parts, and in particular to a composite sealing threaded elbow pipe joint and an assembly process thereof, which is specifically suitable for air conditioning drainage on vehicles. Background Art

[0002] In the prior art, there is a situation where a fuel vehicle is modified to become an electric passenger vehicle. At this time, it is necessary to modify the floor and the front engine compartment based on the fuel vehicle to arrange the three-electric system. Among them, the blower and evaporator assembly can still use the original vehicle, but the drainage pipeline cannot use the original vehicle structure due to the change of the floor, and needs to be redesigned and developed.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects and problems of the prior art that it is not suitable for drainage after a fuel vehicle is converted into an electric passenger vehicle, and to provide a composite sealing threaded elbow pipe joint and an assembly process thereof that is suitable for drainage after a fuel vehicle is converted into an electric passenger vehicle.

[0005] To achieve the above objectives, the technical solution of the present invention is a composite sealing threaded elbow pipe joint, comprising an upper joint and a lower joint connected to each other;

[0006] The upper joint is an upper straight pipe joint, which includes an upper disk body and an upper cylinder body. A through liquid inlet hole is opened in the middle of the upper disk body, the bottom surface of the upper disk body is vertically connected to the top of the upper cylinder body, and a through upper column cavity is opened in the middle of the upper cylinder body, and the top of the upper column cavity is communicated with the liquid inlet hole;

[0007] The lower joint is a lower elbow joint, which includes a connecting body and a liquid outlet pipe. A coaxial liquid outlet cavity is arranged inside the liquid outlet pipe. The inner end of the liquid outlet pipe is connected to the side of the connecting body. An inwardly concave connecting cavity is opened in the middle of the connecting body. The cavity wall of the connecting cavity is connected to the side of the upper cylinder inserted into it, and a cavity liquid hole communicating with the liquid outlet cavity is arranged on the cavity wall.

[0008] The side periphery of the upper cylinder is provided with an external thread, and the cavity wall connected to the cavity is provided with an internal thread which is threadedly connected with the external thread.

[0009] A cutter retreat groove is arranged on the side periphery of the upper cylinder body at a position between the upper disk body and the external thread, and a chamfer is arranged at the intersection of the cutter retreat groove and the upper disk body.

[0010] A sealing gasket is sleeved on a portion of the side periphery of the upper cylinder body near the upper disk body.

[0011] The diameter of the upper column cavity is larger than the diameter of the liquid inlet hole, and the diameter of the liquid outlet cavity is smaller than the diameter of the upper column cavity.

[0012] The upper cylinder and the liquid outlet cavity are both cylindrical in shape; the connector is in the shape of a hexagonal prism, and its cross section is a regular hexagon.

[0013] The inner end of the liquid outlet pipe is vertically connected to the side of the connecting body, and the length of the liquid outlet pipe is greater than the width of the connecting body.

[0014] The cavity wall contacts the side of the upper cylinder, and the portion of the cavity wall in contact with the side of the upper cylinder intersects with the cavity liquid hole to form a junction area, the height of which is less than half of the height of the cavity liquid hole.

[0015] An assembly process for the above-mentioned composite sealing threaded elbow pipe joint includes the following steps: first, insert the upper straight pipe joint from top to bottom into the shell hole opened on the lower shell of the evaporator; after inserting, the upper disk body is embedded in the top of the shell hole; the bottom end of the upper cylinder body extends to the bottom of the lower shell of the evaporator after passing through the shell hole; then, the connecting cavity in the connecting body is sleeved on the side of the upper cylinder body and pre-connected; then, the liquid outlet pipe is rotated to select a suitable liquid outlet angle; after selection, the upper disk body is rotated and the liquid outlet pipe is kept stationary to fix the connecting cavity and the upper cylinder body in connection, thereby completing the assembly process.

[0016] The side periphery of the upper cylinder is provided with an external thread, and the cavity wall is provided with an internal thread threadedly connected to the external thread;

[0017] The pre-connection and fixed connection between the connecting cavity and the upper cylinder are both threaded connections.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. A composite sealing threaded elbow pipe joint and its assembly process of the present invention mainly include an upper straight pipe joint and a lower elbow pipe joint, wherein the upper straight pipe joint includes an upper disk body and an upper cylinder body connected to each other, and the lower elbow pipe joint includes a connecting body and a liquid outlet pipe connected to each other, and the cavity wall of the connecting cavity in the connecting body is connected to the side circumference of the upper cylinder body inserted therein (preferably threaded connection). When used, the upper straight pipe joint is first inserted into the shell hole opened on the lower shell of the evaporator. After being inserted, the upper disk body is embedded in the top of the shell hole, and the bottom end of the upper cylinder body extends to the bottom of the lower shell of the evaporator after passing through the shell hole, and then the connecting cavity is sleeved on the side circumference of the upper cylinder body, so as to realize the installation of the pipe joint system for drainage on the modified electric passenger car, which not only overcomes the defect that the original drainage design cannot be used in the prior art, but also the design of the upper disk body embedded in the top of the shell hole can improve the sealing and water leakage prevention effect. Therefore, the present invention is not only suitable for drainage after the fuel vehicle is converted into an electric passenger vehicle, but also has a strong sealing and water leakage prevention effect.

[0020] 2. In the composite sealing threaded elbow pipe joint and its assembly process of the present invention, a sealing gasket (preferably made of rubber) is sleeved on the side of the upper cylinder body near the upper disk body. When used, the sealing gasket is first embedded in the top of the shell hole together with the upper disk body, and then the upper disk body is rotated to fix the connection cavity and the upper cylinder body, so that the contact surface of the sealing gasket and the lower shell of the evaporator, the upper straight pipe joint, and the lower elbow pipe joint is fully squeezed, further improving the sealing and anti-leakage effect. Therefore, the sealing and anti-leakage effect of the present invention is relatively strong.

[0021] 3. In a composite sealing threaded elbow pipe joint and its assembly process of the present invention, when assembling the upper straight pipe joint and the lower elbow pipe joint, first insert the upper straight pipe joint into the shell hole from top to bottom, then pre-connect the lower elbow pipe joint at the part of the upper cylinder below the lower shell of the evaporator, then adjust the liquid outlet angle of the lower elbow pipe joint, and finally rotate the upper disk body and keep the liquid outlet pipe stationary to fix the connection cavity and the upper cylinder. This assembly process not only simplifies the assembly difficulty and improves the assembly efficiency, but also can adjust the liquid outlet angle to improve the drainage effect. Therefore, the present invention not only has high assembly efficiency, but also has good drainage effect.

[0022] 4. In the composite sealing threaded elbow pipe joint and its assembly process of the present invention, a back-cut groove is provided on the side of the upper cylinder body between the upper disk body and the external thread, and a chamfer is provided at the intersection of the back-cut groove and the upper disk body. This design is not only conducive to the pre-connection and fixed connection between the upper straight pipe joint and the lower elbow pipe joint, improving the connection and assembly effect, but also can ensure the body strength of the upper straight pipe joint and avoid the risk of fracture at the chamfered position. Therefore, the present invention not only has high assembly efficiency, but also has strong safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 Top view of the .

[0025] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle and upper straight pipe joint.

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle and lower elbow joint.

[0027] Figure 5 It is a schematic diagram of the assembly of the present invention and the lower shell of the evaporator.

[0028] Figure 6 yes Figure 5 Bottom view of .

[0029] In the figure: upper straight pipe joint 1, lower curved pipe joint 2, upper disk body 3, liquid inlet hole 31, upper cylinder body 4, external thread 41, backing groove 42, chamfer 43, upper column cavity 44, connector 5, connecting cavity 51, cavity wall 52, cavity liquid hole 53, internal thread 54, liquid outlet pipe 6, liquid outlet cavity 61, sealing gasket 7, junction area 8, evaporator lower shell 9, shell hole 91. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] See also Figure 1 — Figure 6 , a composite sealing threaded elbow pipe joint, comprising an upper joint and a lower joint connected to each other;

[0032] The upper joint is an upper straight pipe joint 1, which includes an upper disk body 3 and an upper cylinder body 4. A through liquid inlet hole 31 is provided in the middle of the upper disk body 3. The bottom surface of the upper disk body 3 is vertically connected to the top of the upper cylinder body 4. A through upper column cavity 44 is provided in the middle of the upper cylinder body 4. The top of the upper column cavity 44 is communicated with the liquid inlet hole 31.

[0033] The lower joint is a lower elbow joint 2, which includes a connecting body 5 and a liquid outlet pipe 6. A coaxial liquid outlet cavity 61 is arranged inside the liquid outlet pipe 6. The inner end of the liquid outlet pipe 6 is connected to the side of the connecting body 5. An inwardly concave connecting cavity 51 is opened in the middle of the connecting body 5. The cavity wall 52 of the connecting cavity 51 is connected to the side of the upper cylinder 4 inserted therein, and a cavity liquid hole 53 communicating with the liquid outlet cavity 61 is arranged on the cavity wall 52.

[0034] An external thread 41 is provided on the side periphery of the upper cylinder 4 , and an internal thread 54 threadably connected to the external thread 41 is provided on the cavity wall 52 connected to the cavity 51 .

[0035] A back cutter groove 42 is provided on the side periphery of the upper cylinder body 4 at a position between the upper disk body 3 and the external thread 41 , and a chamfer 43 is provided at the intersection of the back cutter groove 42 and the upper disk body 3 .

[0036] A sealing gasket 7 is sleeved on the side of the upper cylinder 4 near the upper plate 3 .

[0037] The diameter of the upper column cavity 44 is larger than the diameter of the liquid inlet hole 31 , and the diameter of the liquid outlet cavity 61 is smaller than the diameter of the upper column cavity 44 .

[0038] The upper cylinder 4 and the liquid outlet cavity 61 are both cylindrical in shape; the connector 5 is in the shape of a hexagonal prism, and its cross section is a regular hexagon.

[0039] The inner end of the liquid outlet pipe 6 is vertically connected to the side of the connecting body 5 , and the length of the liquid outlet pipe 6 is greater than the width of the connecting body 5 .

[0040] The cavity wall 52 contacts the side of the upper cylinder 4 , and the portion of the cavity wall 52 in contact with the side of the upper cylinder 4 intersects with the cavity liquid hole 53 to form a junction area 8 , the height of which is less than half of the height of the cavity liquid hole 53 .

[0041] An assembly process for the above-mentioned composite sealing threaded elbow pipe joint includes the following steps: first, insert the upper straight pipe joint 1 from top to bottom into the shell hole 91 opened on the lower shell 9 of the evaporator; after inserting, the upper disk body 3 is embedded in the top of the shell hole 91; the bottom end of the upper cylinder body 4 passes through the shell hole 91 and extends to the bottom of the lower shell 9 of the evaporator; then, the connecting cavity 51 in the connecting body 5 is sleeved on the side of the upper cylinder body 4 and pre-connected; then, the liquid outlet pipe 6 is rotated to select a suitable liquid outlet angle; after selection, the upper disk body 3 is rotated and the liquid outlet pipe 6 is kept stationary to fix the connecting cavity 51 and the upper cylinder body 4 in connection, thereby completing the assembly process.

[0042] The side periphery of the upper cylinder 4 is provided with an external thread 41, and the cavity wall 52 is provided with an internal thread 54 threadably connected to the external thread 41;

[0043] The pre-connection and fixed connection between the connecting cavity 51 and the upper cylinder 4 are both threaded connections.

[0044] The principle of the present invention is described as follows:

[0045] The present invention is preferably composed of three parts: an upper straight pipe joint 1, a lower bent pipe joint 2, and a sealing gasket 7. The external thread 41 in the upper straight pipe joint 1 cooperates with the internal thread 54 in the lower bent pipe joint 2. A backing groove 42 is retained between the upper disk body 3 in the upper straight pipe joint 1 and the lower external thread 41, and an R chamfer 43 is processed to ensure the strength of the body.

[0046] During on-site assembly, first put the sealing gasket 7 on the bottom of the upper disk body 3, then insert the upper straight pipe joint 1 into the shell hole 91 of the lower shell 9 of the evaporator from top to bottom, then screw the lower elbow pipe joint 2 on the upper straight pipe joint 1 to achieve pre-connection, and then after adjusting the liquid outlet angle of the lower elbow pipe joint 2, rotate the upper disk body 3 and tighten it to achieve a fixed connection between the connection cavity 51 and the upper cylinder 4. It can be seen that this design has good assembly processability and good water leakage prevention performance.

[0047] Embodiment 1:

[0048] See also Figure 1 — Figure 6 A composite sealing threaded elbow pipe joint, comprising an upper straight pipe joint 1 and a lower elbow pipe joint 2 connected to each other, the upper straight pipe joint 1 comprising an upper disk body 3 and an upper cylinder body 4, a through liquid inlet hole 31 is provided in the middle of the upper disk body 3, the bottom surface of the upper disk body 3 is vertically connected to the top of the upper cylinder body 4, a through upper column cavity 44 is provided in the middle of the upper cylinder body 4, and the top of the upper column cavity 44 is communicated with the liquid inlet hole 31; the lower elbow pipe joint 2 comprises a connector 5 and a liquid outlet pipe 6, a coaxial liquid outlet cavity 61 is provided inside the liquid outlet pipe 6, the inner end of the liquid outlet pipe 6 is connected to the side of the connector 5, an inwardly concave connecting cavity 51 is provided in the middle of the connector 5, the cavity wall 52 of the connecting cavity 51 is connected to the side of the upper cylinder body 4 inserted therein, and a cavity liquid hole 53 communicating with the liquid outlet cavity 61 is provided on the cavity wall 52.

[0049] An assembly process for the above-mentioned composite sealing threaded elbow pipe joint includes the following steps: first, insert the upper straight pipe joint 1 from top to bottom into the shell hole 91 opened on the lower shell 9 of the evaporator; after inserting, the upper disk body 3 is embedded in the top of the shell hole 91; the bottom end of the upper cylinder body 4 passes through the shell hole 91 and extends to the bottom of the lower shell 9 of the evaporator; then, the connecting cavity 51 in the connecting body 5 is sleeved on the side of the upper cylinder body 4 and pre-connected; then, the liquid outlet pipe 6 is rotated to select a suitable liquid outlet angle; after selection, the upper disk body 3 is rotated and the liquid outlet pipe 6 is kept stationary to fix the connecting cavity 51 and the upper cylinder body 4 in connection, thereby completing the assembly process.

[0050] Embodiment 2:

[0051] The basic content is the same as that of Example 1, except that:

[0052] An external thread 41 is provided on the side periphery of the upper cylinder 4 , and an internal thread 54 threadably connected to the external thread 41 is provided on the cavity wall 52 connected to the cavity 51 .

[0053] At this time, the pre-connection and the fixed connection between the connecting cavity 51 and the upper cylinder 4 are both threaded connections.

[0054] Embodiment 3:

[0055] The basic content is the same as that of Example 1, except that:

[0056] A back cutter groove 42 is provided on the side periphery of the upper cylinder body 4 at a position between the upper disk body 3 and the external thread 41 , and a chamfer 43 is provided at the intersection of the back cutter groove 42 and the upper disk body 3 .

[0057] Embodiment 4:

[0058] The basic content is the same as that of Example 1, except that:

[0059] A sealing gasket 7 is sleeved on the side of the upper cylinder 4 near the upper plate 3 .

[0060] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An assembly process for a composite sealing threaded elbow joint, characterized in that The assembly process comprises the following steps: First, the upper straight pipe joint (1) is inserted from top to bottom into the shell hole (91) opened on the lower shell (9) of the evaporator. After the insertion, the upper disk body (3) is embedded in the top of the shell hole (91), and the bottom end of the upper cylinder body (4) passes through the shell hole (91) and extends to the bottom of the lower shell (9) of the evaporator. Then, the connecting cavity (51) in the connecting body (5) is sleeved on the side of the upper cylinder body (4) and pre-connected. Then, the liquid outlet pipe (6) is rotated to select a suitable liquid outlet angle. After the selection, the upper disk body (3) is rotated and the liquid outlet pipe (6) is kept stationary to fix the connecting cavity (51) and the upper cylinder body (4) to complete the assembly process. The composite sealing threaded elbow pipe joint comprises an upper joint and a lower joint connected to each other, the upper joint being an upper straight pipe joint (1), the upper straight pipe joint (1) comprising an upper disk body (3) and an upper cylinder body (4), a through-going liquid inlet hole (31) being provided in the middle of the upper disk body (3), the bottom surface of the upper disk body (3) being vertically connected to the top of the upper cylinder body (4), a through-going upper column cavity (44) being provided in the middle of the upper cylinder body (4), the top of the upper column cavity (44) being in communication with the liquid inlet hole (31); The lower joint is a lower elbow joint (2), comprising a connecting body (5) and a liquid outlet pipe (6), wherein a coaxial liquid outlet cavity (61) is provided inside the liquid outlet pipe (6), the inner end of the liquid outlet pipe (6) is connected to the side of the connecting body (5), an inwardly concave connecting cavity (51) is provided in the middle of the connecting body (5), a cavity wall (52) of the connecting cavity (51) is connected to the side periphery of an upper cylinder (4) inserted therein, and a cavity liquid hole (53) communicating with the liquid outlet cavity (61) is provided on the cavity wall (52).

2. The assembly process of a composite sealing threaded elbow pipe joint according to claim 1, characterized in that: An external thread (41) is provided on the side periphery of the upper cylinder (4), and an internal thread (54) threadably connected to the external thread (41) is provided on the cavity wall (52) connected to the cavity (51).

3. The assembly process of a composite sealing threaded elbow pipe joint according to claim 2, characterized in that: A cutter groove (42) is provided on the side periphery of the upper cylinder (4) at a position between the upper disk body (3) and the external thread (41), and a chamfer (43) is provided at the intersection of the cutter groove (42) and the upper disk body (3).

4. An assembly process for a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: A sealing gasket (7) is sleeved on a portion of the side periphery of the upper cylinder (4) close to the upper disk (3).

5. The assembly process of a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: The diameter of the upper column cavity (44) is greater than the diameter of the liquid inlet hole (31), and the diameter of the liquid outlet cavity (61) is smaller than the diameter of the upper column cavity (44).

6. An assembly process for a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: The upper cylinder (4) and the liquid outlet cavity (61) are both cylindrical in shape; the connector (5) is in the shape of a hexagonal prism, and its cross section is a regular hexagon.

7. An assembly process for a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: The inner end of the liquid outlet pipe (6) is vertically connected to the side of the connecting body (5), and the length of the liquid outlet pipe (6) is greater than the width of the connecting body (5).

8. An assembly process for a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: The cavity wall (52) contacts the side periphery of the upper cylinder (4), and the portion of the cavity wall (52) in contact with the side periphery of the upper cylinder (4) intersects with the cavity liquid hole (53) to form a junction area (8), the height of the junction area (8) being less than half the height of the cavity liquid hole (53).

9. An assembly process for a composite sealing threaded elbow pipe joint according to claim 1, 2 or 3, characterized in that: The side periphery of the upper cylinder (4) is provided with an external thread (41), and the cavity wall (52) is provided with an internal thread (54) threadably connected to the external thread (41); The pre-connection and fixed connection between the connecting cavity (51) and the upper cylinder (4) are both threaded connections.

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