Steel pipe hydrostatic pressure test and steel pipe bimetal composite integrated device

Abstract

The invention relates to the technical field of steel pipe tests, in particular to a steel pipe hydrostatic pressure test and steel pipe bimetal composite integrated device which comprises a body, and the body comprises a water injection pressure test device, an exhaust pressure test device, a steel pipe self-centering lifting device, a steel pipe clamping device and a pressure test frame. The top of the steel pipe self-centering lifting device is provided with a movable assembly used for sealing the connecting position between the steel pipes, the surface of the movable assembly is provided with a rotating assembly used for limiting the steel pipes, and a rotating ring of the movable assembly rotates to drive a sliding rod and a movable rod to be in linkage, so that a sealing ring is attached to the connecting position of the steel pipes; by matching with the reset fixation of the telescopic block and the fixed spring, the joints of the spliced steel pipes of different specifications are tightly sealed, so that the positioning error caused by frequent replacement of parts is reduced, the sealing reliability is improved, the test pressure stability is ensured, the test data accuracy is improved, and the overall operation stability and safety of the device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe testing, in particular to a steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device. Background Art

[0002] In modern industry, steel pipes serve as core components in scenarios such as fluid transportation and structural support. Their pressure-bearing performance and structural stability are directly related to project safety and operational efficiency. Hydrostatic pressure testing is a key method for detecting the compressive strength and sealing performance of steel pipes. Hydrostatic pressure testing utilizes chemical or physical analysis equipment to test the pipe's hydrostatic pressure. By injecting high-pressure water into the pipe and maintaining a specific pressure, it is possible to visually determine whether the pipe has defects such as leaks and deformation. Bimetallic composite steel pipes, due to the synergistic performance of their base layer (such as carbon steel, which ensures strength) and cladding layer (such as stainless steel, which provides corrosion resistance), are increasingly used in corrosive environments such as the petroleum, chemical, and water conservancy industries. The composite quality (such as interfacial bonding strength) must be achieved and verified through a hydrostatic composite process.

[0003] However, when using the existing steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, although it "adopts a detachable design of large-diameter and small-diameter steel pipe sealing and valve seat parts", it can adapt to steel pipes of different specifications by replacing the mold, but in actual operation, frequent replacement of sealing heads and molds may increase the process time. If the positioning accuracy is insufficient during the replacement process (such as the fitting clearance error between the sealing head and the valve seat), it may lead to loose sealing, affect the pressure stability during pressure testing or composite, and even cause the risk of high-pressure water leakage, thereby reducing the accuracy of test data and work efficiency. Summary of the Invention

[0004] To solve the positioning accuracy insufficient situation in the process of frequent replacement of sealing head and mold, like the gap error of the cooperation of sealing head and valve seat, and further lead to the sealing is not strict, the sealing is not strict not only affect the pressure strength of steel pipe, the accuracy problem of sealing performance detection when pressure test, the application provides a kind of steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, it includes body, the body includes: water injection pressure testing device, exhaust pressure testing device, steel pipe self-centering lifting device, steel pipe clamping device and pressure testing frame body;The top of steel pipe self-centering lifting device is provided with movable assembly, rotating assembly and fixed assembly;Wherein, movable assembly includes: fixed block, the fixed block is installed at the top of steel pipe self-centering lifting device, the fixed block top is equipped with fixed ring, the fixed ring inside is rotatably connected with swivel ring, the swivel ring surface is slidably connected with slide bar, the slide bar outside is installed with movable rod, the movable rod passes through fixed ring, the movable rod surface is fixedly installed with connecting plate, the connecting plate outside is installed with sealing ring, the swivel ring surface is fixedly installed with expansion block, the expansion block inside is fixedly installed with fixed spring, the expansion block surface is fixedly installed with plug, the fixed ring surface is installed with multiple groups of square block, the plug is inserted in the inside of multiple groups of square block;

[0005] The technical scheme is characterized in that: the steel pipe to be tested or processed is placed on the steel pipe self-centering lifting device, the steel pipe self-centering lifting device automatically adjusts to the pressure testing axial center position according to the steel pipe specification after the steel pipe enters the pressure testing area, the steel pipe clamping device clamps the steel pipe, the water injection pressure testing device advances, the exhaust pressure testing device advances, the super-high pressure water system is operated, the pipe end is sealed, the steel pipe hydrostatic pressure test or bimetallic hydrostatic pressure composite is performed, at the same time, the pressure testing frame body provides a stable support structure for the entire operation, the water injection pressure testing device and the exhaust pressure testing device are in a standby state, and are ready for corresponding water injection and exhaust operation, when the steel pipe needs to be sealed, the steel pipe is placed on the inner side of the rotating ring, the movable assembly is installed on the top of the steel pipe self-centering lifting device based on the fixed block, which provides stable support for the upper part, the fixed ring installed on the top of the fixed block constructs a relatively stable frame structure, the telescopic block is stretched by pulling it upward, the restriction of the square block on the surface of the telescopic block is released after the telescopic block is stretched, then the telescopic block is operated to control the rotation of the rotating ring in the fixed ring, when the rotating ring rotates, the slide rod is pulled through the arc-shaped slot on the surface of the rotating ring, so that the slide rod moves towards the center point of the fixed ring, when the slide rod moves, the movement of the movable rod is driven, when the movable rod moves, the sealing ring moves towards the surface of the steel pipe through the connecting plate, so that the sealing ring is tightly attached to the connecting part of the surface of the steel pipe for sealing, and the sealing ring is made of rubber, after sealing, the telescopic block is loosened, so that the telescopic block is reset under the action of the fixed spring, and the insert is re-inserted into the inner side of the square block for fixation, so as to prevent the water from leaking out of the gap when a certain pressure water is injected into the steel pipe during the steel pipe hydrostatic pressure test, so as to accurately establish a stable and required test pressure in the steel pipe, and to affect the detection accuracy of the related performance indicators of the steel pipe pressure bearing capacity, the sealing ring is tightly attached to the connecting part of the surface of the steel pipe, which can effectively prevent water from leaking out of these parts, so as to ensure that the pressure in the steel pipe can be maintained at a set state, to create conditions for smooth test, to ensure accurate and reliable test data, and to improve the overall operation stability and safety of the device.

[0006] As a further improvement of the technical solution, the rotating assembly comprises a sliding block slidingly connected to the top of the steel pipe self-centering lifting device, a connecting ring fixedly installed on the top of the sliding block, a rotating disc rotatably connected inside the connecting ring, a connecting block fixedly installed on the surface of the rotating disc, a long rod penetrating through the connecting block inside, the long rod being fixedly installed on the outer wall of the telescopic block, a sliding rod slidingly connected to the surface of the rotating disc, a movable block fixedly installed on the surface of the sliding rod, a moving rod fixedly installed on the outer side of the movable block, a fixed strip fixedly installed on the inner side of the connecting ring, and the moving rod is slidingly connected to the inner side of the fixed strip.

[0007] On this basis, in the process of steel pipe hydrostatic pressure test and related processing, the steel pipe may deviate in position, the connection may loosen, etc. when bearing pressure, thereby affecting the accuracy of the test and the stability of the device as a whole. In order to better fix the position of the steel pipe, enhance the stability of the connection, and ensure that the test can be carried out smoothly under stable and reliable conditions, the rotating assembly is constructed on the top of the steel pipe self-centering lifting device, and the various components cooperate with each other to realize specific movements and functions. The sliding block can slide on the top of the steel pipe self-centering lifting device, which provides a flexible activity basis for the linkage of subsequent components. The connecting ring fixedly installed on the top of the sliding block serves as a key connection and support structure, and is rotatably connected with the rotating disc inside, so that the rotating disc can rotate within the range defined by the connecting ring. The long rod plays a key role in power transmission, and is fixedly installed on the outer wall of the telescopic block and penetrates through the connecting block inside the rotating disc. When the telescopic block drives the rotating disc to move downward, the displacement or stress state of the long rod changes, and the long rod further transmits the movement or force change to the rotating disc connected thereto, so that the rotating disc starts to rotate with the connecting ring as the support. During the rotation of the rotating disc, the sliding rod slidingly connected to the surface of the rotating disc will produce a corresponding sliding action with the rotation of the rotating disc. Since the movable block is fixedly installed on the surface of the sliding rod, the sliding of the sliding rod will drive the movable block to move. The moving rod fixedly installed on the outer side of the movable block will change its position with the movement of the movable block and move towards the center point of the connecting ring to form a closed effect. The moving rod is slidingly connected to the inner side of the fixed strip, and the fixed strip provides a guide and limiting action for the sliding of the moving rod, ensuring that the moving rod can stably displace in the predetermined direction. Through the closure of the movable block, the spliced steel pipe can be restricted to prevent relative displacement of the steel pipe during the test process due to internal pressure, avoid the occurrence of gaps or even disconnection at the connection, thereby affecting the sealing effect and causing pressure leakage, etc. problems, improve the overall structural stability of the steel pipe during the test process, ensure that the test pressure can be stably maintained at the set value, make the test data more accurate and reliable, and at the same time improve the operation safety of the entire device, etc. benefits, so that the steel pipe hydrostatic pressure test and related processing work can be carried out efficiently and orderly.

[0008] As a further improvement of the technical solution, the fixing assembly comprises a fixing frame mounted on the top of the steel pipe self-centering lifting device, a rotating shaft rotatably connected inside the fixing frame, a control plate fixedly mounted on the surface of the rotating shaft, a plug plate fixedly mounted on the outside of the rotating shaft, a tooth plate fixedly mounted on the surface of the sliding block, the plug plate being plugged on the top of the tooth plate, a volute spring fixedly mounted on the surface of the rotating shaft, and the volute spring being fixedly mounted on the inner wall of the fixing frame.

[0009] In another scheme, since the length and width of the steel pipe after splicing are not the same, in order to improve the stability of the steel pipe of different sizes, the operator can drive the rotating shaft to rotate by operating the control plate, and when the rotating shaft rotates, the plug plate on the outside of the rotating shaft will move along with the rotating shaft, the plug plate will gradually separate from the top of the tooth plate, the restriction on the sliding block will be removed, and the sliding block can slide on the top of the steel pipe self-centering lifting device. Today, the restriction on the steel pipe is adjusted, and when the operation is completed and the external force is removed, due to the existence of the volute spring on the rotating shaft, the volute spring will generate a restoring force based on its elastic properties, promoting the rotating shaft to rotate back, so that the plug plate returns to the top of the tooth plate and is plugged again, restoring the restriction on the sliding block. Thus, it is ensured that the relevant parts of the device can maintain a relatively fixed position after the operation adjustment, maintaining the stability of the device as a whole, preventing the normal operation of the subsequent test or processing process from being affected by accidental sliding and the like, and improving the stability of the device and the accuracy of the test.

[0010] As a further improvement of the technical solution, the fixing ring and the connecting ring are both provided with groove one, the rotating ring is provided with an arc-shaped groove, the rotating disc is provided with a rectangular groove, the fixing strip is provided with a sliding groove, and the sealing ring is provided with three pieces. The cross section of the three sealing rings after splicing is circular. In order to further improve the sealing effect of the steel pipe connection, the groove one on the surface of the fixing ring and the connecting ring can guide and limit the movement of the moving parts of the movable assembly and the rotating assembly, avoiding the deviation of the parts during movement and affecting the fitting accuracy of the sealing ring and the steel pipe. The arc-shaped groove on the surface of the rotating ring can make the sliding rod smoothly slide along the preset track when the rotating ring rotates, ensuring that the movable rod drives the sealing ring to move uniformly and ensuring that the fitting force of each part of the sealing ring and the surface of the steel pipe is consistent. The rectangular groove on the surface of the rotating disc provides a stable path for the sliding of the sliding rod, and the sliding groove on the surface of the fixing strip restricts the movement of the moving rod, making the operation of the rotating assembly more accurate and indirectly ensuring the sealing effect of the sealing ring. The design that the cross section of the three sealing rings after splicing is circular can adapt to steel pipes of different diameters, and through the cooperative movement of the three sealing rings, the steel pipe connection can be tightly wrapped, the sealing gap can be greatly reduced, high-pressure water leakage can be effectively prevented, and the reliability of the sealing can be further improved.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] 1. In the steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, the rotating ring of the movable assembly is rotated to drive the sliding rod and the movable rod to link, so that the sealing ring is attached to the connection of the steel pipe, and the telescopic block and the reset fixing of the fixed spring are matched to tightly seal the connection after splicing of steel pipes of different specifications, reduce the positioning error caused by frequent replacement of parts, improve the sealing reliability, ensure the stability of the test pressure, improve the accuracy of the test data, and improve the overall operation stability and safety of the device.

[0013] 2. In the steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, the rotating disc of the rotating assembly is rotated to drive the sliding rod and the movable rod to gather towards the center, forming a surrounding restriction on the steel pipe, and the insert plate and the toothed plate of the fixed assembly are engaged and positioned, which can adapt to steel pipes of different lengths and widths, prevent displacement of the steel pipe or loosening of the connection during the test, enhance the overall stability of the device, and improve the operation safety.

[0014] 3. In the steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, the rotating shaft is rotated by the control plate to make the insert plate disengage from the toothed plate to release the restriction on the sliding block, and the sliding block can slide on the top of the self-centering lifting device of the steel pipe to realize flexible adjustment of the restriction on the spliced steel pipe of different lengths and widths, adapt to the test requirements of steel pipes of various specifications, expand the application range of the device, and further improve the reliability of the sealing. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall front view structure of the present application;

[0016] Figure 2 It is a schematic diagram of the overall top view structure of the present application;

[0017] Figure 3 It is a schematic diagram of the connection structure of the movable assembly, rotating assembly and fixed assembly of the present application;

[0018] Figure 4 It is a schematic diagram of the structure of the movable assembly part of the present application;

[0019] Figure 5 It is a schematic diagram of the structure of the movable assembly side of the present application;

[0020] Figure 6 It is a schematic diagram of the structure of the telescopic block section of the present application;

[0021] Figure 7 It is a schematic diagram of the structure of the rotating assembly front view of the present application;

[0022] Figure 8It is a structure schematic diagram of the movable block front view of the application.

[0023] Figure 9 It is a structure schematic diagram of the fixed assembly front view of the application.

[0024] The meanings of various labels in the figure are as follows:

[0025] 1, body; 2, water injection pressure testing device; 3, exhaust pressure testing device; 4, steel pipe self-centering lifting device; 5, steel pipe clamping device; 6, pressure testing frame body; 7, movable assembly; 71, fixed block; 72, fixed ring; 73, rotating ring; 74, sliding rod; 75, movable rod; 76, connecting plate; 77, sealing ring; 78, telescopic block; 79, fixed spring; 710, insertion strip; 711, square block; 8, rotating assembly; 81, sliding block; 82, connecting ring; 83, rotating disc; 84, connecting block; 85, long rod; 86, sliding rod; 87, movable block; 88, moving rod; 89, fixed strip; 9, fixed assembly; 91, fixed frame; 92, rotating shaft; 93, control plate; 94, insertion plate; 95, toothed plate; 96, volute spring; 720, groove one; 730, arc-shaped groove; 830, rectangular groove; 890, sliding groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0027] In use, the existing steel pipe hydrostatic pressure testing and steel pipe bimetallic composite integrated device frequently replace the sealing head and the mold, which easily leads to insufficient positioning accuracy, sealing is not strict, pressure is not stable, even leakage and other problems, affecting the accuracy of test data and work efficiency.

[0028] Therefore, the application provides a steel pipe hydrostatic pressure testing and steel pipe bimetallic composite integrated device, as shown in Figure 1 The steel pipe hydrostatic pressure testing and steel pipe bimetallic composite integrated device comprises a body 1, and the body 1 comprises a water injection pressure testing device 2, an exhaust pressure testing device 3, a steel pipe self-centering lifting device 4, a steel pipe clamping device 5 and a pressure testing frame body 6.

[0029] Specifically, as shown in Figure 2 Figure 6 ​The shown activity assembly 7 includes: a fixed block 71 installed at the top of the steel pipe self-centering lifting device 4, a fixed ring 72 is installed at the top of the fixed block 71, a rotating ring 73 is rotatably connected inside the fixed ring 72, a sliding rod 74 is slidably connected to the surface of the rotating ring 73, a movable rod 75 is installed on the outer side of the sliding rod 74, the movable rod 75 penetrates the fixed ring 72, a connecting plate 76 is fixedly installed on the surface of the movable rod 75, a sealing ring 77 is installed on the outer side of the connecting plate 76, an expansion block 78 is fixedly installed on the surface of the rotating ring 73, a fixed spring 79 is fixedly installed inside the expansion block 78, an insertion strip 710 is fixedly installed on the surface of the expansion block 78, and a plurality of square blocks 711 are installed on the surface of the fixed ring 72. The insertion strip 710 is inserted into the inner side of the plurality of square blocks 711.

[0030] In work, the steel pipe is placed inside the rotating ring 73, the expansion block 78 is pulled upwards to make the insertion strip 710 disengage from the square block 711, the rotating ring 73 is rotated, the arc-shaped groove 730 on the surface of the rotating ring 73 drives the sliding rod 74 to move to the center, the sliding rod 74 pushes the sealing ring 77 to adhere to the connection of the steel pipe through the movable rod 75 and the connecting plate 76, the expansion block 78 is loosened, the fixed spring 79 resets it, the insertion strip 710 is reinserted into the square block 711 to be fixed, and tight sealing is realized.

[0031] Further, referring to Figure 7 Figure 8 As shown, the rotating assembly 8 includes: a sliding block 81 slidably connected to the top of the steel pipe self-centering lifting device 4, a connecting ring 82 is fixedly installed at the top of the sliding block 81, a rotating disc 83 is rotatably connected inside the connecting ring 82, a connecting block 84 is fixedly installed on the surface of the rotating disc 83, a long rod 85 penetrates inside the connecting block 84, the long rod 85 is fixedly installed on the outer wall of the expansion block 78, a sliding rod 86 is slidably connected to the surface of the rotating disc 83, a movable block 87 is fixedly installed on the surface of the sliding rod 86, a moving rod 88 is fixedly installed on the outer side of the movable block 87, a fixed strip 89 is fixedly installed on the inner side of the connecting ring 82, and the moving rod 88 is slidably connected to the inner side of the fixed strip 89.

[0032] In work, the expansion block 78 moves to drive the rotating disc 83 to rotate inside the connecting ring 82 through the long rod 85, the rectangular groove 830 on the surface of the rotating disc 83 drives the sliding rod 86 to slide, the sliding rod 86 drives the movable block 87 and the moving rod 88 to gather to the center along the sliding groove 890 of the fixed strip 89, forming a surrounding fixation to the steel pipe to prevent displacement of the steel pipe during the test.

[0033] Among them, referring to Figure 9 ​As shown, the fixing assembly 9 comprises a fixing frame 91 mounted on the top of the steel pipe self-centering lifting device 4, a rotating shaft 92 rotatably connected inside the fixing frame 91, a control plate 93 fixedly installed on the surface of the rotating shaft 92, a plug plate 94 fixedly installed on the outer side of the rotating shaft 92, a toothed plate 95 fixedly installed on the surface of the sliding block 81, the plug plate 94 being inserted into the top of the toothed plate 95, a volute spring 96 fixedly installed on the surface of the rotating shaft 92 and fixedly installed on the inner wall of the fixing frame 91.

[0034] In operation, rotating the control plate 93 drives the rotating shaft 92 to rotate, so that the plug plate 94 is separated from the toothed plate 95, and the sliding block 81 can slide on the steel pipe self-centering lifting device 4 to adjust the position. After adjustment, the control plate 93 is loosened, the volute spring 96 drives the rotating shaft 92 to reset, the plug plate 94 is inserted into the toothed plate 95 to lock the sliding block 81, and the fixing requirements of different specifications of steel pipes are adapted.

[0035] The groove 720 of the fixing ring 72 and the connecting ring 82 guides and limits the moving parts of the movable assembly 7 and the rotating assembly 8, so as to avoid deviation and affect the fitting accuracy of the sealing ring 77. The arc-shaped groove 730 of the rotating ring 73 makes the sliding rod 74 slide along the preset track, so as to ensure uniform movement and consistent fitting force of the sealing ring 77. The rectangular groove 830 of the rotating disc 83 provides a stable path for the sliding rod 86, the sliding groove 890 of the fixing strip 89 restricts the moving rod 88, and the operation precision of the rotating assembly 8 is improved to ensure the sealing effect. The three sealing rings 77 are spliced into a circular cross section, which can adapt to steel pipes of different diameters, tightly wrap the connection through cooperative movement, reduce the sealing gap, prevent high-pressure water leakage, and improve the sealing reliability.

[0036] In summary, the existing steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device can effectively solve the problems of insufficient positioning accuracy, loose sealing, and influence on test data accuracy and work efficiency caused by frequent replacement of sealing heads and molds.

[0037] Working principle: the steel pipe to be tested is placed on the steel pipe self-centering lifting device 4, and is preliminarily fixed through the steel pipe clamping device 5, the test pressure frame body 6 provides stable support, when the movable assembly 7 is operated, the telescopic block 78 is pulled upward to make the insertion bar 710 disengage from the square block 711, the rotating ring 73 is rotated, the arc-shaped groove 730 on the surface of the rotating ring 73 drives the sliding rod 74 to move to the center, the sliding rod 74 drives the three rubber sealing rings 77 to adhere to the steel pipe connection through the movable rod 75 and the connecting plate 76, after the telescopic block 78 is loosened, the fixed spring 79 makes it reset, the insertion bar 710 is inserted into the square block 711 to be fixed, the sealing is realized, at the same time, the telescopic block 78 moves through the long rod 85 to drive the rotating disc 83 to rotate in the connecting ring 82, the rectangular groove 830 of the rotating disc 83 drives the sliding rod 86 to slide, drives the movable block 87 and the moving rod 88 to gather to the center along the fixed strip 89 and the sliding groove 890, and forms the surrounding fixation of the steel pipe, when the fixed assembly 9 is adjusted, the control plate 93 is rotated to make the rotating shaft 92 drive the insertion plate 94 to disengage from the toothed plate 95, the sliding block 81 can slide on the steel pipe self-centering lifting device 4 to adjust the position, after the adjustment is completed, the volute spring 96 drives the rotating shaft 92 to reset, the insertion plate 94 is inserted into the toothed plate 95 to lock the sliding block 81, finally, the water injection pressure test device 2 injects water, the exhaust pressure test device 3 exhausts, and the hydrostatic pressure test or bimetallic composite operation is carried out, and the test is stably carried out through the cooperation of each assembly.

[0038] It should be noted that the relational terms herein such as first and second and the like merely refer to one entity or action distinguished from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device, comprising a body (1), characterized in that: The main body (1) comprises: a water injection pressure test device (2), an exhaust pressure test device (3), a steel pipe self-centering lifting device (4), a steel pipe clamping device (5) and a pressure test frame (6); a movable component (7) for sealing the connection between steel pipes is provided on the top of the steel pipe self-centering lifting device (4); a rotating component (8) for restricting the steel pipes is provided on the surface of the movable component (7); and a fixed component (9) for positioning the rotating component (8) is provided on the top of the steel pipe self-centering lifting device (4); The movable assembly (7) comprises: a fixed block (71), the fixed block (71) being mounted on the top of the steel pipe self-centering lifting device (4), a fixed ring (72) being mounted on the top of the fixed block (71), a rotating ring (73) being rotatably connected inside the fixed ring (72), a sliding rod (74) being slidably connected on the surface of the rotating ring (73), a movable rod (75) being mounted on the outside of the sliding rod (74), the movable rod (75) passing through the fixed ring (72), a connecting plate (76) being fixedly mounted on the surface of the movable rod (75), and a sealing ring (77) being mounted on the outside of the connecting plate (76).

2. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 1, characterized in that: A telescopic block (78) is fixedly mounted on the surface of the rotating ring (73), a fixed spring (79) is fixedly mounted inside the telescopic block (78), an inserting strip (710) is fixedly mounted on the surface of the telescopic block (78), and multiple groups of blocks (711) are mounted on the surface of the fixing ring (72), and the inserting strip (710) is plugged into the inner sides of the multiple groups of blocks (711).

3. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 1, characterized in that: The rotating assembly (8) comprises: a sliding block (81), the sliding block (81) is slidably connected to the top of the steel pipe self-centering lifting device (4), a connecting ring (82) is fixedly installed on the top of the sliding block (81), a turntable (83) is rotatably connected inside the connecting ring (82), a connecting block (84) is fixedly installed on the surface of the turntable (83), a long rod (85) passes through the inside of the connecting block (84), and the long rod (85) is fixedly installed on the outer wall of the telescopic block (78).

4. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 3, characterized in that: The surface of the rotating disk (83) is slidably connected to a sliding rod (86), a movable block (87) is fixedly mounted on the surface of the sliding rod (86), and a moving rod (88) is fixedly mounted on the outside of the movable block (87).

5. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 4, characterized in that: A fixing bar (89) is fixedly installed on the inner side of the connecting ring (82), and the moving rod (88) is slidably connected to the inner side of the fixing bar (89).

6. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 3, characterized in that: The fixing assembly (9) comprises a fixing frame (91), the fixing frame (91) being mounted on the top of the steel pipe self-centering lifting device (4), a rotating shaft (92) being rotatably connected inside the fixing frame (91), a control panel (93) being fixedly mounted on the surface of the rotating shaft (92), and a plug plate (94) being fixedly mounted on the outside of the rotating shaft (92).

7. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 6, characterized in that: A tooth plate (95) is fixedly mounted on the surface of the sliding block (81), and the inserting plate (94) is inserted into the top of the tooth plate (95).

8. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 6, characterized in that: A scroll spring (96) is fixedly mounted on the surface of the rotating shaft (92), and the scroll spring (96) is fixedly mounted on the inner wall of the fixing frame (91).

9. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 5, characterized in that: The surfaces of the fixing ring (72) and the connecting ring (82) are both provided with a groove 1 (720), the surface of the rotating ring (73) is provided with an arc groove (730), the surface of the rotating disk (83) is provided with a rectangular groove (830), and the surface of the fixing bar (89) is provided with a sliding groove (890).

10. The steel pipe hydrostatic pressure test and steel pipe bimetallic composite integrated device according to claim 1, characterized in that: The sealing ring (77) is provided in three pieces, and the cross section of the three sealing rings (77) after being spliced ​​together is circular.

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