Composite pipeline joint external pressure sealing performance detection equipment

Abstract

The utility model discloses external pressure sealing performance detection equipment for a composite pipeline joint. The external pressure sealing performance detection equipment comprises a tank body, a pipeline sealing assembly, a tensile sealing plate, a sealing connector and a detection assembly, the joint part of the composite pipeline joint is coaxially sleeved with a tank body, and the right side surface of the tank body extends rightwards out of the composite pipeline joint and is coaxially and hermetically screwed with a tensile sealing plate; a sealing connecting body is coaxially arranged in the middle of the left side face of the tensile sealing plate, and the end face of the joint part of the composite pipeline joint is coaxially connected with the sealing connecting body in a sealed and threaded mode. The left side face of the tank body extends leftwards to the pipeline part of the composite pipeline connector, a pipeline sealing assembly is coaxially arranged on the left side face of the tank body in a sealed and screwed mode, the pipeline sealing assembly is connected to the pipeline part of the composite pipeline connector in a sealed, abutting and sleeving mode, a sealed cavity is formed in the tank body, and a detection assembly is arranged on the tank body. And external pressure sealing performance detection is carried out through the detection assembly. According to the utility model, the accuracy of external pressure sealing performance detection is improved.

Description

Technical Field

[0001] This utility model relates to the field of composite pipe joint testing technology, specifically to a composite pipe joint external pressure sealing testing device. Background Technology

[0002] Composite pipelines are mostly multi-layered structures, and their traditional sealing performance testing methods are primarily internal pressure sealing tests. However, in actual use, external pressure often causes corrosive media to seep into the annular zone of the pipeline from the joints, resulting in corrosion of the pipeline structural layers, reducing the service life of the composite pipeline, or causing leaks. Especially in deep-sea applications, the pressure and corrosiveness of external seawater often cause seawater to seep into the spaces between the pipeline layers (annular zone) from the joints, corroding the pipeline joints and structural layers from the inside.

[0003] Currently available testing equipment can only test the external pressure seal of joints between two pipes, and cannot test individual joints. Therefore, the above problems urgently need to be solved. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a composite pipe joint external pressure sealing test device. This utility model ensures the fixation of the relative position of the composite pipe joint during the test, improves the sealing performance of the test area, and thus improves the accuracy of external pressure sealing test.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A composite pipe joint external pressure sealing performance testing device of the present invention includes a horizontally arranged composite pipe joint, with the joint portion of the composite pipe joint facing to the right; its innovation lies in that it further includes a tank, a pipe sealing assembly, a tensile sealing plate, a sealing connector, and a testing assembly; a matching tank is also coaxially and horizontally sleeved on the joint portion of the composite pipe joint, and both sides of the tank are open; the right side of the tank extends to the right from the composite pipe joint and is coaxially aligned with the tensile sealing plate. A sealing screw connection is provided; a sealing connector is also coaxially fixed at the middle position of the left side of the tensile sealing plate, and the end face of the joint portion of the composite pipe joint is coaxially and sealed screwed with the sealing connector; the left side of the tank extends to the pipe portion of the composite pipe joint, and a pipe sealing assembly is also coaxially and sealed screwed on its left side. The pipe sealing assembly is sealed and tightly fitted onto the pipe portion of the composite pipe joint, and cooperates with the tensile sealing plate to form a sealed cavity inside the tank. A detection assembly is also provided on the tank, and the external pressure sealing performance of the composite pipe joint is then tested through the detection assembly.

[0006] Preferably, it also includes locking bolts I; the inner diameter of the tank body is larger than the outer diameter of the composite pipe joint, and the tensile sealing plate is coaxially aligned and fitted with the right side of the tank body. Several locking bolts I are also evenly distributed and vertically screwed along the circumference of the right side of the tensile sealing plate near its edge, thereby fixing the tensile sealing plate to the right side of the tank body coaxially by means of locking bolts I.

[0007] Preferably, a sealing gasket is also included; a matching sealing gasket is also provided coaxially between the right side of the tank body and the tensile sealing plate, and the sealing performance between the tank body and the tensile sealing plate is ensured by the sealing gasket.

[0008] Preferably, the pipe sealing assembly includes a pipe sealing plate, a locking plate, locking bolt II, and locking bolt III; each pipe sealing plate is a fan-shaped structure that matches the left side of the tank, and several pipe sealing plates are coaxially spliced ​​to form a circular plate that matches the left side of the tank; a first fan-shaped groove is coaxially embedded at the intersection of the two radii of each pipe sealing plate, and each first fan-shaped groove matches the pipe portion of the composite pipe joint; several through holes matching locking bolt II are evenly distributed and vertically embedded along the circumference of the left side of each pipe sealing plate near its arc edge, and an internal thread matching locking bolt II is vertically embedded on the left side of the tank relative to each through hole position, thereby fixing each pipe sealing plate coaxially to the left side of the tank through the cooperation of locking bolt II, through through holes and internal threads;

[0009] On the left side of each pipe sealing plate, near its two radii, an L-shaped locking plate is provided radially and vertically. The short side of each locking plate is horizontally to the left, away from the corresponding pipe sealing plate, and is located at the first sector groove of the corresponding pipe sealing plate. The long side of each locking plate is radially arranged along the corresponding pipe sealing plate and is fixedly connected to the corresponding pipe sealing plate, ensuring that its outer surface is aligned with the corresponding end face of the corresponding pipe sealing plate. Each locking plate is located within the inner range of the corresponding through hole, and several locking holes matching the locking bolts III are vertically embedded and opened at intervals on the outer surface of each locking plate. By screwing the locking bolts III into the corresponding locking holes, adjacent locking plates are aligned and screwed together, thereby coaxially splicing several pipe sealing plates together. When the pipe sealing plate is screwed and fixed to the left side of the tank, the pipe sealing plate is coaxially sleeved and attached to the pipe part of the composite pipe joint through its first sector groove.

[0010] Preferably, it also includes a reinforcing plate; a reinforcing plate is coaxially fixed between the short sides of the corresponding two locking plates on the left side of each pipe sealing plate, each reinforcing plate is an arc-shaped structure that matches the first sector groove of the corresponding pipe sealing plate, and its two ends are respectively fixedly connected to the inner side of the short side of the corresponding locking plate and integrally formed; the inner arc surface of each reinforcing plate is aligned with the inner circumferential surface of the corresponding pipe sealing plate, and the corresponding locking plate is fixed and reinforced by the reinforcing plate, and it is ensured that the reinforcing plate does not interfere with the locking action of the locking bolt III.

[0011] Preferably, it further includes an elastic sealing body I; a matching second sector-shaped groove is coaxially and vertically embedded on the right side of each of the pipe sealing plates, the inner end of each second sector-shaped groove extends vertically out of the inner circumferential surface of the corresponding pipe sealing plate, and its outer end extends to the outer side of the corresponding through hole, ensuring that it does not extend out of the outer circumferential surface of the corresponding pipe sealing plate; an elastic sealing body I is coaxially fitted in the second sector-shaped groove of each of the pipe sealing plates, and the thickness of each elastic sealing body I corresponds to the opening depth of the corresponding second sector-shaped groove. The inner end of each elastic sealing body I is horizontally flanged towards the direction of the corresponding first sector-shaped groove and respectively fitted to the inner circumferential surface of the corresponding pipe sealing plate, thereby ensuring the sealing performance between the tank and the pipe sealing plate, and between the pipe sealing plate and the pipe part of the composite pipe joint through the elastic deformation generated when they are tightly fitted.

[0012] Preferably, it further includes an elastic sealing body II; each of the two radial end faces of the pipe sealing plate is vertically embedded with a matching L-shaped groove, one end of the long side of each L-shaped groove extends vertically out of the inner circumference of the corresponding pipe sealing plate, and the other end of the long side extends to the outer side relative to the corresponding through hole, ensuring that it does not extend out of the outer circumference of the corresponding pipe sealing plate; the short side of each L-shaped groove is located near the first fan-shaped groove, and the short side extends to the outer side of the corresponding lock hole, ensuring that it does not extend out of the inner surface of the long side of the corresponding lock plate; an elastic sealing body II is coaxially fitted in the L-shaped groove of each pipe sealing plate, and the thickness of each elastic sealing body II corresponds to the opening depth of the corresponding L-shaped groove, thereby ensuring the sealing performance between adjacent lock plates through the elastic deformation generated when they are tightly fitted.

[0013] Preferably, the detection assembly includes a pressure pipe, a pressure control valve, an exhaust pipe, an exhaust valve, a drain pipe, a drain valve, a pressure sensor, and a temperature sensor. A pressure pipe is also connected to the bottom and left side of the outer circumference of the tank body. One end of the pressure pipe is sealed to the interior of the tank body, and the other end is sealed to a pressure source. A pressure control valve is also connected to the pressure pipe to control its on / off state. An exhaust pipe is also connected to the top and right side of the outer circumference of the tank body. One end of the exhaust pipe is sealed to the interior of the tank body, and the other end is connected to the outside. An exhaust valve is also connected to the exhaust pipe to control its on / off state. A drain pipe is also connected to the bottom and right side of the outer circumference of the tank body. One end of the drain pipe is sealed to the interior of the tank body, and the other end is connected to the outside. A drain valve is also connected to the drain pipe to control its on / off state. A pressure sensor and a temperature sensor are also connected at intervals on either side of the top and middle of the outer circumference of the tank body. The pressure sensor monitors the pressure inside the tank, and the temperature sensor monitors the temperature inside the tank.

[0014] The beneficial effects of this utility model are: This utility model ensures the fixation of the relative position of the composite pipe joint during the testing process, improves the sealing performance of the testing area, and thus improves the accuracy of external pressure sealing test. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a composite pipe joint external pressure sealing test device according to the present invention.

[0017] Figure 2 This is a schematic diagram of the pipe sealing assembly of this utility model.

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of a single pipe sealing plate section.

[0019] Among them, 1-composite pipe joint; 2-tank body; 3-tensile sealing plate; 4-locking bolt I; 5-sealing gasket; 6-sealing connection body; 7-pipe sealing plate; 8-through hole; 9-second sector groove; 10-locking plate; 11-L-shaped groove; 12-lock hole; 13-reinforcing plate; 14-elastic sealing body I; 15-pressure control valve; 16-exhaust valve; 17-drain valve; 18-pressure sensor; 19-temperature sensor; 20-locking bolt II; 21-locking bolt III. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0021] This utility model discloses a composite pipe joint external pressure sealing performance testing device, comprising a horizontally arranged composite pipe joint 1, with the joint portion of the composite pipe joint 1 facing to the right; the specific structure is as follows. Figures 1-3 As shown, the system also includes a tank 2, a pipe sealing assembly, a tensile sealing plate 3, a sealing connector 6, and a testing assembly. A matching tank 2 is coaxially and horizontally sleeved at the joint portion of the composite pipe joint 1, with both sides of the tank 2 being open. The composite pipe joint 1 extends from the right side of the tank 2 and is coaxially aligned and sealed with the tensile sealing plate 3. A sealing connector 6 is coaxially fixed at the middle of the left side of the tensile sealing plate 3, and the end face of the joint portion of the composite pipe joint 1 is coaxially sealed with the sealing connector 6. This invention, by setting the sealing connector 6, forms a robust integrated structure between the composite pipe joint 1 and the testing equipment. During the testing process, changes in internal pressure will not cause relative positional movement between the composite pipe joint 1 and the testing equipment, thus avoiding pressure changes caused by spatial variations due to relative displacement and improving testing accuracy.

[0022] Among them, such as Figure 1 As shown, the inner diameter of the tank body 2 is larger than the outer diameter of the composite pipe joint 1, and the tensile sealing plate 3 is coaxially aligned and fitted with the right side of the tank body 2. Several locking bolts I4 are also evenly distributed and vertically screwed along the circumference of the right side of the tensile sealing plate 3 near its edge, thereby fixing the tensile sealing plate 3 and the right side of the tank body 2 coaxially by means of the locking bolts I4.

[0023] like Figure 1 As shown, a matching sealing gasket 5 is also provided coaxially between the right side of the tank body 2 and the tensile sealing plate 3, and the sealing performance between the tank body 2 and the tensile sealing plate 3 is ensured by the sealing gasket 5.

[0024] The left side of the tank body 2 extends to the pipe portion of the composite pipe joint 1, and a pipe sealing assembly is coaxially and screwed onto its left side. The pipe sealing assembly is tightly fitted onto the pipe portion of the composite pipe joint 1 and, in conjunction with the tensile sealing plate 3, forms a sealed cavity inside the tank body 2. A detection assembly is also provided on the tank body 2 to perform external pressure sealing tests on the composite pipe joint 1. The pipe sealing assembly includes a pipe sealing plate 7, a locking plate 10, a reinforcing plate 13, an elastic sealing body I 14, an elastic sealing body II, a locking bolt II 20, and a locking bolt III 21. Figures 1-3 As shown, each pipe sealing plate 7 is a fan-shaped structure that matches the left side of the tank body 2, and several pipe sealing plates 7 are coaxially spliced ​​to form a circular plate that matches the left side of the tank body 2; at the intersection of the two radii of each pipe sealing plate 7, a first fan-shaped groove is also coaxially embedded, and each first fan-shaped groove matches the pipe part of the composite pipe joint 1; on the left side of each pipe sealing plate 7, near its arc edge, several through holes 8 that match the locking bolts II 20 are also evenly spaced and vertically embedded along its circumference; and on the left side of the tank body 2, relative to each through hole 8, an internal thread that matches the locking bolts II 20 is also vertically embedded; thus, through the cooperation of the locking bolts II 20, the through holes 8, and the internal thread, each pipe sealing plate 7 is coaxially screwed and fixed to the left side of the tank body 2.

[0025] like Figures 1-3 As shown, on the left side of each pipe sealing plate 7, near its two radii, an L-shaped locking plate 10 is also provided radially and vertically. The short side of each locking plate 10 is horizontally positioned to the left, away from the corresponding pipe sealing plate 7, and is located at the first sector groove position of the corresponding pipe sealing plate 7. The long side of each locking plate 10 is radially positioned along the corresponding pipe sealing plate 7 and is fixedly connected to the corresponding pipe sealing plate 7, ensuring that its outer surface is aligned with the corresponding end face of the corresponding pipe sealing plate 7. Each locking plate 10 is located at... Within the inner range of the corresponding through hole 8, and on the outer side of each locking plate 10, several locking holes 12 that match the locking bolts Ⅲ21 are vertically embedded and opened at intervals. By screwing the locking bolts Ⅲ21 and the corresponding locking holes 12, the adjacent locking plates 10 are aligned and screwed together, thereby splicing several pipe sealing plates 7 together coaxially. When the pipe sealing plate 7 is screwed and fixed to the left side of the tank 2, the pipe sealing plate 7 is coaxially sleeved and attached to the pipe part of the composite pipe joint 1 through its first sector groove.

[0026] like Figures 1-3As shown, a reinforcing plate 13 is coaxially fixed on the left side of each pipe sealing plate 7 between the short sides of the corresponding two locking plates 10. Each reinforcing plate 13 is an arc-shaped structure that matches the first sector groove of the corresponding pipe sealing plate 7, and its two ends are fixedly connected to the inner side of the short side of the corresponding locking plate 10, and are integrally formed. The inner arc surface of each reinforcing plate 13 is aligned with the inner circumference of the corresponding pipe sealing plate 7, and the corresponding locking plate 10 is fixed and reinforced by the reinforcing plate 13, and the locking action of the locking bolt Ⅲ21 is not interfered with by the reinforcing plate 13.

[0027] like Figures 1-3 As shown, a matching second sector-shaped groove 9 is coaxially and vertically embedded on the right side of each pipe sealing plate 7. The inner end of each second sector-shaped groove 9 extends vertically out of the inner circumferential surface of the corresponding pipe sealing plate 7, and its outer end extends to the outer side of the corresponding through hole 8, ensuring that it does not extend out of the outer circumferential surface of the corresponding pipe sealing plate 7. A matching elastic sealing body I14 is also coaxially fitted in the second sector-shaped groove 9 of each pipe sealing plate 7, and the thickness of each elastic sealing body I14 corresponds to the opening depth of the corresponding second sector-shaped groove 9. The inner end of each elastic sealing body I14 is horizontally flanged towards the direction of the corresponding first sector-shaped groove and is fitted to the inner circumferential surface of the corresponding pipe sealing plate 7. Thus, the elastic deformation generated when they are tightly fitted ensures the sealing performance between the tank 2 and the pipe sealing plate 7, and between the pipe sealing plate 7 and the pipe part of the composite pipe joint 1.

[0028] like Figures 1-3 As shown, each pipe sealing plate 7 has a matching L-shaped groove 11 vertically embedded on its two radial end faces. One end of the long side of each L-shaped groove 11 extends vertically out of the inner circumference of the corresponding pipe sealing plate 7, and the other end extends to the outer side of the corresponding through hole 8, ensuring that it does not extend out of the outer circumference of the corresponding pipe sealing plate 7. The short side of each L-shaped groove 11 is located near the first fan-shaped groove, and the short side extends to the outer side of the corresponding lock hole 12, ensuring that it does not extend out of the inner surface of the long side of the corresponding lock plate 10. An elastic sealing body II is coaxially fitted in each L-shaped groove 11 of the pipe sealing plate 7, and the thickness of each elastic sealing body II corresponds to the opening depth of the corresponding L-shaped groove 11. The elastic deformation generated when they are tightly fitted ensures the sealing performance between adjacent lock plates 10.

[0029] The detection assembly of this utility model includes a pressure pipe, a pressure control valve 15, an exhaust pipe, an exhaust valve 16, a drain pipe, a drain valve 17, a pressure sensor 18, and a temperature sensor 19; as shown... Figures 1-3As shown, a pressure pipe is connected to the bottom and left side of the outer circumference of the tank 2. One end of the pressure pipe is sealed to the inside of the tank 2, and the other end is sealed to the pressure source. A pressure control valve 15 is connected to the pressure pipe to control its on / off state. An exhaust pipe is connected to the top and right side of the outer circumference of the tank 2. One end of the exhaust pipe is sealed to the inside of the tank 2, and the other end is connected to the outside. An exhaust valve 16 is connected to the exhaust pipe to control its on / off state. A drain pipe is connected to the bottom and right side of the outer circumference of the tank 2. One end of the drain pipe is sealed to the inside of the tank 2, and the other end is connected to the outside. A drain valve 17 is connected to the drain pipe to control its on / off state. A pressure sensor 18 and a temperature sensor 19 are connected at intervals on the left and right sides of the top and middle of the outer circumference of the tank 2. The pressure sensor 18 monitors the pressure inside the tank 2, and the temperature sensor 19 monitors the temperature inside the tank 2.

[0030] The working principle of this utility model:

[0031] First, the tank body 2 is coaxially fitted onto the joint portion of the composite pipe joint 1. Then, the sealing connection body 6 is coaxially sealed to the end face of the joint portion of the composite pipe joint 1. The right side of the tank body 2 is coaxially screwed and fixed to the tensile sealing plate 3 using locking bolt I4, thereby sealing the right side of the tank body 2. Then, each pipe sealing plate 7 is coaxially screwed and positioned to the corresponding position on the left end face of the tank body 2 using locking bolt II20, but not tightened yet. Then, adjacent locking plates 10 are screwed and fixed using locking bolt III21, thereby coaxially screwing several pipe sealing plates 7 into a whole. At this time, the locking bolt II20 is tightened, and the left side of the tank body 2 is sealed by the cooperation of the pipe sealing plate 7, elastic sealing body I14, and elastic sealing body II, ensuring the sealing performance between the pipe sealing plate 7 and the pipe portion of the composite pipe joint 1.

[0032] Then, open the exhaust valve 16, close the drain valve 17, and open the pressure control valve 15 in sequence. By injecting water into the tank 2, the air in the tank 2 is discharged through the exhaust pipe. After the air is completely discharged, close the exhaust valve 16. When the pressure reaches the detection pressure, close the pressure control valve 15 and maintain it for a certain period of time. The temperature and pressure values ​​can then be monitored by the temperature sensor 19 and the pressure sensor 18, respectively. After the detection is completed, open the drain valve 17 to drain the water out of the tank 2.

[0033] The beneficial effects of this utility model are: This utility model ensures the fixation of the relative position of the composite pipe joint 1 during the testing process, improves the sealing performance of the testing area, and thus improves the accuracy of the external pressure sealing test.

[0034] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A composite pipe joint external pressure sealing performance testing device, comprising a horizontally arranged composite pipe joint, wherein the joint portion of the composite pipe joint faces to the right; characterized in that: It also includes a tank, a pipe sealing assembly, a tensile sealing plate, a sealing connector, and a testing assembly. A matching tank is coaxially and horizontally fitted onto the joint portion of the composite pipe joint, with both sides of the tank being open. The right side of the tank extends to the right of the composite pipe joint and is coaxially aligned and sealed with the tensile sealing plate. A sealing connector is coaxially fixed at the middle of the left side of the tensile sealing plate, and the end face of the joint portion of the composite pipe joint is coaxially sealed with the sealing connector. The left side of the tank extends to the left of the pipe portion of the composite pipe joint, and a pipe sealing assembly is coaxially sealed and screwed onto its left side. The pipe sealing assembly is tightly fitted onto the pipe portion of the composite pipe joint and, in conjunction with the tensile sealing plate, forms a sealed cavity inside the tank. A testing assembly is also provided on the tank to perform external pressure sealing tests on the composite pipe joint.

2. The composite pipe joint external pressure sealing test equipment according to claim 1, characterized in that: It also includes locking bolts I; the inner diameter of the tank is larger than the outer diameter of the composite pipe joint, and the tensile sealing plate is coaxially aligned and fitted with the right side of the tank. Several locking bolts I are also evenly distributed and vertically screwed along the circumference of the right side of the tensile sealing plate near its edge, thereby fixing the tensile sealing plate to the right side of the tank coaxially by means of locking bolts I.

3. The composite pipe joint external pressure sealing test equipment according to claim 2, characterized in that: It also includes a sealing gasket; a matching sealing gasket is also provided coaxially between the right side of the tank body and the tensile sealing plate, and the sealing performance between the tank body and the tensile sealing plate is ensured by the sealing gasket.

4. The composite pipe joint external pressure sealing test equipment according to claim 1, characterized in that: The pipe sealing assembly includes a pipe sealing plate, a locking plate, locking bolt II, and locking bolt III. Each pipe sealing plate is a fan-shaped structure that matches the left side of the tank body, and several pipe sealing plates are coaxially spliced ​​to form a circular plate that matches the left side of the tank body. A first fan-shaped groove is coaxially embedded at the intersection of the two radii of each pipe sealing plate, and each of the first fan-shaped grooves matches the pipe portion of the composite pipe joint. Several through holes matching locking bolt II are evenly distributed and vertically embedded along the circumference of the left side of each pipe sealing plate near its arc edge. An internal thread matching locking bolt II is also vertically embedded on the left side of the tank body relative to each through hole. Thus, through the cooperation of locking bolt II, through holes, and internal threads, each pipe sealing plate is coaxially screwed and fixed to the left side of the tank body. On the left side of each pipe sealing plate, near its two radii, an L-shaped locking plate is provided radially and vertically. The short side of each locking plate is horizontally to the left, away from the corresponding pipe sealing plate, and is located at the first sector groove of the corresponding pipe sealing plate. The long side of each locking plate is radially arranged along the corresponding pipe sealing plate and is fixedly connected to the corresponding pipe sealing plate, ensuring that its outer surface is aligned with the corresponding end face of the corresponding pipe sealing plate. Each locking plate is located within the inner range of the corresponding through hole, and several locking holes matching the locking bolts III are vertically embedded and opened at intervals on the outer surface of each locking plate. By screwing the locking bolts III into the corresponding locking holes, adjacent locking plates are aligned and screwed together, thereby coaxially splicing several pipe sealing plates together. When the pipe sealing plate is screwed and fixed to the left side of the tank, the pipe sealing plate is coaxially sleeved and attached to the pipe part of the composite pipe joint through its first sector groove.

5. The composite pipe joint external pressure sealing test equipment according to claim 4, characterized in that: It also includes reinforcing plates; a reinforcing plate is coaxially fixed between the short sides of the corresponding two locking plates on the left side of each pipe sealing plate. Each reinforcing plate is an arc-shaped structure that matches the first sector groove of the corresponding pipe sealing plate, and its two ends are fixedly connected to the inner side of the short side of the corresponding locking plate and integrally formed. The inner arc surface of each reinforcing plate is aligned with the inner circumferential surface of the corresponding pipe sealing plate, and the corresponding locking plate is fixed and reinforced by the reinforcing plate, and it is ensured that the reinforcing plate does not interfere with the locking action of the locking bolt III.

6. The composite pipe joint external pressure sealing test equipment according to claim 5, characterized in that: It also includes an elastic sealing body I; on the right side of each of the pipe sealing plates, a matching second sector-shaped groove is coaxially and vertically embedded, the inner end of each second sector-shaped groove extends vertically out of the inner circumferential surface of the corresponding pipe sealing plate, and its outer end extends to the outer side of the corresponding through hole, ensuring that it does not extend out of the outer circumferential surface of the corresponding pipe sealing plate; in the second sector-shaped groove of each of the pipe sealing plates, a matching elastic sealing body I is coaxially fitted, and the thickness of each elastic sealing body I corresponds to the opening depth of the corresponding second sector-shaped groove. The inner end of each elastic sealing body I is horizontally flanged towards the direction of the corresponding first sector-shaped groove and respectively fitted to the inner circumferential surface of the corresponding pipe sealing plate, thereby ensuring the sealing performance between the tank and the pipe sealing plate, and between the pipe sealing plate and the pipe part of the composite pipe joint through the elastic deformation generated when they are tightly fitted.

7. The composite pipe joint external pressure sealing test equipment according to claim 6, characterized in that: It also includes an elastic sealing body II; each of the two radial end faces of the pipe sealing plate is vertically embedded with a matching L-shaped groove, one end of the long side of each L-shaped groove extends vertically out of the inner circumference of the corresponding pipe sealing plate, and the other end of the long side extends to the outside of the corresponding through hole, ensuring that it does not extend out of the outer circumference of the corresponding pipe sealing plate; the short side of each L-shaped groove is located near the first fan-shaped groove, and the short side extends to the outside of the corresponding lock hole, ensuring that it does not extend out of the inner surface of the long side of the corresponding lock plate; an elastic sealing body II is coaxially fitted in the L-shaped groove of each pipe sealing plate, and the thickness of each elastic sealing body II corresponds to the opening depth of the corresponding L-shaped groove, thereby ensuring the sealing performance between adjacent lock plates through the elastic deformation generated when they are tightly fitted.

8. The composite pipe joint external pressure sealing test equipment according to claim 1, characterized in that: The detection assembly includes a pressure pipe, a pressure control valve, an exhaust pipe, an exhaust valve, a drain pipe, a drain valve, a pressure sensor, and a temperature sensor. A pressure pipe is connected to the bottom and left side of the outer circumference of the tank body. One end of the pressure pipe is sealed to the interior of the tank body, and the other end is sealed to a pressure source. A pressure control valve is connected to the pressure pipe to control its on / off state. An exhaust pipe is connected to the top and right side of the outer circumference of the tank body. One end of the exhaust pipe is sealed to the interior of the tank body, and the other end is connected to the outside. An exhaust valve is connected to the exhaust pipe to control its on / off state. A drain pipe is connected to the bottom and right side of the outer circumference of the tank body. One end of the drain pipe is sealed to the interior of the tank body, and the other end is connected to the outside. A drain valve is connected to the drain pipe to control its on / off state. A pressure sensor and a temperature sensor are connected at intervals on either side of the top and middle of the outer circumference of the tank body. The pressure sensor monitors the pressure inside the tank, and the temperature sensor monitors the temperature inside the tank.

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