A high-end steel pipe water injection pressure resistance test equipment and method

Abstract

This invention relates to the field of steel pipe testing technology, and proposes a high-end steel pipe water injection pressure resistance testing device and method. The high-end steel pipe water injection pressure resistance testing device includes a base plate, on which a first support platform, a second support platform, and a third support platform are sequentially arranged from front to back. A conveyor belt is installed on the first support platform. An extension assembly is arranged above the third support platform, and a first electric push rod is installed on the extension assembly. The first electric push rod and the base plate are connected by a bearing. A stop block is welded to the base plate. A top plate is arranged above the extension assembly, and a second motor is installed on the top plate. A first gear is fixedly connected to the output shaft of the second motor. This technical solution solves the problems of existing pressure resistance testing devices that cannot automatically press down on the steel pipe while bringing the water injection structure close to it using a single drive device, and that cannot individually test and conveniently switch between steel pipes.

Description

Technical Field

[0001] This invention relates to the field of steel pipe testing technology, specifically to a high-end steel pipe water injection pressure resistance testing device and method. Background Technology

[0002] Steel pipes are widely used in industries such as petroleum, natural gas, chemical, power, and shipbuilding, especially in high-pressure transmission systems where they withstand enormous internal and external pressure loads. To ensure the quality of steel pipes, testing is required after production. Water injection pressure resistance testing equipment is mainly used to test the pressure resistance of steel pipes under high-pressure environments, ensuring their safety and reliability in practical applications. However, existing testing equipment still has some shortcomings.

[0003] The invention patent with publication number CN113670537A discloses a steel pipe hydrostatic testing machine, including a placement frame, a machine frame, a testing mechanism, and multiple clamping mechanisms. Each clamping mechanism includes two movable clamping plates, a synchronous linkage component that drives the two clamping plates, and a driving component. A clamping area is formed between the two clamping plates. A guide plate on the machine frame guides the steel pipes into the clamping area. An ejection mechanism located below the placement frame conveys the steel pipes one by one to the guide plate. A feeding linkage mechanism that drives the ejection mechanism is located between the ejection mechanism and one of the clamping plates. A discharge rod rotatably mounted on the machine frame ejects the steel pipes out of the clamping area. A discharge linkage mechanism that drives the discharge rod is located between the discharge rod and another clamping plate. This device can realize automatic feeding and discharging of steel pipes without the need for an additional driving source, thereby greatly reducing manual workload and labor costs for enterprises. It is suitable for the future development needs of enterprises and is energy-saving and environmentally friendly. While the aforementioned device can reduce labor costs, it cannot automatically press down the steel pipe while bringing the water injection structure close to it using a single drive device. Furthermore, it cannot continuously rotate the screw to keep the steel pipe pressed down while simultaneously bringing the water injection structure close to it. Additionally, existing testing equipment cannot individually test or easily switch between steel pipes. Summary of the Invention

[0004] This invention proposes a high-end steel pipe water injection pressure resistance test equipment and method, which solves the problems of existing testing equipment not being able to automatically press down the steel pipe while bringing the water injection structure close to the steel pipe through a single drive device, and not being able to continuously rotate the screw to keep the steel pipe in a compressed state while automatically bringing the water injection structure close to the steel pipe after the steel pipe is pressed, and existing testing equipment not being able to test each steel pipe individually and switch between them conveniently.

[0005] The technical solution of the present invention is as follows:

[0006] A high-end steel pipe water injection pressure resistance testing device includes a base plate. From front to back, a first support platform, a second support platform, and a third support platform are sequentially arranged on the base plate. A conveyor belt is installed on the first support platform. An extension assembly is arranged above the third support platform, and a first electric push rod is installed on the extension assembly. A stop block is welded onto the base plate. A top plate is arranged above the extension assembly, and a second motor is installed on the top plate. A first gear is fixedly connected to the output shaft of the second motor, and a second gear is meshed with the rear side of the first gear. The second gear and the top plate are rotatably connected. Next, a rack is meshed with the front side of the first gear, a connecting frame is fixedly connected to the rack, a water injection pipe is fixedly connected to the connecting frame, the rack and the connecting frame are slidably connected to the top plate, a fixing frame is welded to the connecting frame, a third electric push rod is installed on the fixing frame, a first connecting block is fixedly connected to the third electric push rod, an installation rod is provided through the first connecting block, a second connecting block is fixedly installed below the installation rod, a second spring is fixedly connected between the second connecting block and the first connecting block, and a feeding assembly is installed in the second support platform;

[0007] A connecting assembly is installed inside the second gear. A stud is installed above the connecting assembly. An outer bushing is threaded to the outside of the stud. A second connecting plate is fixedly installed on the outer bushing. A guide rod is welded to the bottom of the second connecting plate. A second electric push rod is fixedly installed in the middle of the bottom of the top plate. A first pressure plate is fixedly connected to the bottom of both the guide rod and the second electric push rod. A second pressure plate is installed on the first pressure plate.

[0008] As a preferred embodiment of the present invention, the extension assembly includes a first motor fixedly mounted on the base plate, a first connecting cylinder keyed to the output shaft of the first motor, a spline rod fixedly mounted on the first connecting cylinder, a second connecting cylinder keyed to the outer side of the spline rod, a placement groove being provided on both the first connecting cylinder and the second connecting cylinder, and both the second connecting cylinder and the spline rod being rotatably connected to the first electric push rod.

[0009] As a preferred embodiment of the present invention, the connecting assembly includes an outer ring fixedly connected to the second gear, a connecting block rotatably mounted inside the outer ring, a slot being formed in the connecting block, a locking block being fitted onto the inner wall of the slot, a first spring being fixedly connected between the locking block and the outer ring, and the connecting block and the stud being fixedly connected.

[0010] As a preferred embodiment of the present invention, the card block has a groove inside, and a protruding rod is fixedly connected inside the outer ring. The card block forms a sliding structure with the outer ring through the protruding rod and the groove.

[0011] As a preferred embodiment of the present invention, a first connecting plate is fixedly connected to the top of the stud, and the second connecting plate and the guide rod together form a lifting structure with the top plate through the stud and the outer bushing.

[0012] As a preferred embodiment of the present invention, the first support platform, the second support platform, and the third support platform are all divided into a left half and a right half. The left half and the right half of the first support platform, the second support platform, and the third support platform are all connected by a sliding connection. The left half of the first support platform, the second support platform, and the third support platform are fixedly connected to the second connecting cylinder to form an integral structure. The right half of the first support platform, the second support platform, and the third support platform are fixedly connected to the first connecting cylinder to form an integral structure.

[0013] As a preferred embodiment of the present invention, the upper surfaces of the second support platform and the third support platform are both higher in the front and lower in the back, the third support platform is in close contact with the first connecting cylinder and the second connecting cylinder, and the placement grooves are evenly distributed along the circumference of the first connecting cylinder and the second connecting cylinder.

[0014] As a preferred embodiment of the present invention, the feeding assembly includes a third motor fixedly connected to the second support platform, an eccentric wheel mounted on the output shaft of the third motor, a lifting platform slidably mounted on the second support platform, a moving groove provided on the lifting platform, a limit block provided in the moving groove, and a sliding connection between the limit block and the second support platform.

[0015] As a preferred embodiment of the present invention, a first extension tube is slidably installed inside the water injection pipe, a second extension tube is fixedly connected to the first extension tube, a third spring is fixedly connected between the second extension tube and the water injection pipe, the inner wall of the water injection pipe is in contact with the outer walls of the first connecting block and the second connecting block, and an installation rod is fixedly connected to the second connecting block, the installation rod passing through the first connecting block.

[0016] A method for water injection pressure resistance testing of high-end steel pipes includes the following steps:

[0017] S1: Adjust the extension length of the extension assembly according to the length of the steel pipe. When the length of the extension assembly changes, the lengths of the first support platform, the second support platform, and the third support platform will also change accordingly.

[0018] S2: The steel pipes are transported from the first support platform to the second support platform by the conveyor belt. The steel pipes on the second support platform are then transported one by one to the third support platform by the feeding assembly. The inclined surface of the third support platform is used to transport the steel pipes to the extension assembly. The extension assembly then transports the steel pipes to the area to be inspected.

[0019] S3: The first gear is driven to rotate by the second motor. The first gear drives the second gear and the connecting assembly to rotate. When the second gear and the connecting assembly rotate, the stud will rotate, thereby changing the height of the outer bushing, the second connecting plate and the guide rod. This allows the steel pipe in the area to be tested to be pressed tightly by the first and second pressure plates at the bottom of the guide rod. After the steel pipe is pressed, the second gear continues to rotate. When the rotation resistance of the stud is too great, the connecting assembly will slide on the stud, thereby keeping the steel pipe in a fixed state.

[0020] S4: The continuous rotation of the first gear will cause the rack to pull the water injection pipe and the connecting frame to move. The water injection pipe will press the steel pipe, and the side of the steel pipe away from the water injection pipe will abut against the stop block. At this time, both ends of the steel pipe are closed. Through the third electric push rod on the extension fixing frame, the first connecting block will be driven to move downward. The first connecting block will gradually press the second connecting block through the second spring. The second connecting block will gradually increase the water pressure in the water injection pipe and the steel pipe, and complete the water injection pressure resistance test of the steel pipe. After the test is completed, the steel pipe will be transported to the rear of the device through the extension component.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. Through the set first gear, second gear, and connecting components, when the second motor drives the first gear to rotate, it will drive the second gear to rotate and drive the rack to move. When the second gear rotates, it will drive the connecting block to rotate through the locking block on the outer ring. During the rotation of the connecting block, the stud will rotate and drive the second connecting plate to move downward under the guidance of the guide rod, so that the first pressure plate and the second pressure plate press the steel pipe tightly, so that the device remains stable during subsequent water pressure testing. After the first pressure plate and the second pressure plate press the steel pipe tightly, the resistance of the stud to continue rotating increases until the outer ring slides outside the connecting block. At this time, the first gear continues to rotate and will drive the rack and connecting frame to move. The connecting frame will cause the water injection pipe to press the side of the steel pipe tightly. The side of the steel pipe away from the water injection pipe will abut against the stop block, so that both ends of the steel pipe remain closed. This allows the device to automatically press down the steel pipe while the water injection structure is close to the steel pipe through a single drive device during operation, and can continue to move the water injection pipe after pressing down the steel pipe, which enhances the convenience of the device during use.

[0023] 2. Through the segmented structure of the first support platform, second support platform, third support platform and extension component on the device, when the extension component extends its own length, it can drive the three support platforms to extend synchronously, so that the device can adapt to steel pipes of different lengths for water injection pressure resistance testing. In addition, the second electric push rod set above the spline rod can independently push the steel pipe to the middle position, so that the steel pipe can be pressure tested from the outside to the inside at the same time as the water injection pressure resistance test, which enhances the applicability of the device.

[0024] 3. The device is equipped with a feeding assembly, a first electric push rod, and an extension assembly. When the first electric push rod extends, it can drive the spline rod to slide inside the second connecting cylinder. Since the first electric push rod, the spline rod, and the second connecting cylinder are all rotatably connected, the overall length of the device can be adjusted without affecting the normal rotation of the second connecting cylinder to accommodate steel pipes of different lengths, ensuring the stability of the device during operation. The device can drive the eccentric wheel to rotate via the third motor on the feeding assembly, causing the lifting platform to move up and down intermittently. When the lifting platform moves upward, it will drive a single steel pipe upward and transport it to the placement slot, thereby realizing the function of testing one by one. After the test is completed, the device can drive the first connecting cylinder, the spline rod, and the second connecting cylinder to rotate via the first motor, thereby facilitating the switching of steel pipes and enhancing the convenience of the device during use. This solves the problem that existing steel pipe pressure testing devices cannot test one by one and facilitate the switching of steel pipes. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of a high-end steel pipe water injection pressure resistance testing device according to the present invention;

[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of the structure at point A;

[0028] Figure 3 yes Figure 1 Enlarged schematic diagram of the structure at point B;

[0029] Figure 4 yes Figure 1 Enlarged schematic diagram of the structure at point C;

[0030] Figure 5 yes Figure 1 Enlarged schematic diagram of the structure at point D;

[0031] Figure 6 yes Figure 1 Enlarged schematic diagram of the structure at point E;

[0032] Figure 7 This is a schematic diagram of the internal structure of the second support platform of the present invention;

[0033] Figure 8 yes Figure 7 Enlarged schematic diagram of the structure at point F;

[0034] Figure 9 yes Figure 7 Enlarged schematic diagram of the structure at point G;

[0035] Figure 10This is a schematic diagram of the internal structure of the connecting component of the present invention;

[0036] Figure 11 This is a schematic diagram of the connection structure between the first electric push rod and the extension assembly of the present invention.

[0037] Reference numerals: 1. Base plate; 2. Stop block; 3. First electric push rod; 4. Top plate; 5. Extension assembly; 501. First motor; 502. First connecting cylinder; 503. Spline rod; 504. Second connecting cylinder; 505. Placement slot; 6. Second motor; 7. First gear; 8. Second gear; 9. Connecting assembly; 901. Outer ring; 902. Connecting block; 903. Slot; 904. Locking block; 905. Groove; 906. Protruding rod; 907. First spring; 10. Stud; 11. Outer bushing; 12. First connecting plate; 13. Second connecting plate; 14. Guide rod; 15. Second electric push rod; 16. First pressure plate; 17. Second pressure plate; 18. First support platform; 19. Second support platform; 20. 21. Third support platform; 21. Feeding assembly; 2101. Third motor; 2102. Eccentric wheel; 2103. Moving trough; 2104. Limit block; 2105. Lifting platform; 22. Conveyor belt; 2201. Fourth motor; 2202. First synchronous pulley; 2203. Synchronous belt; 2204. Second synchronous pulley; 2205. Rotary roller; 2206. Track; 2207. Anti-slip groove; 23. Fixed frame; 24. Third electric push rod; 25. First connecting block; 26. Mounting rod; 27. Second spring; 28. Second connecting block; 29. ​​Water injection pipe; 30. Connecting frame; 31. First connecting rod; 32. Pipe sleeve; 33. Rack; 34. First extension pipe; 35. Second extension pipe; 36. Third spring. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figures 1-11As shown, this embodiment proposes a high-end steel pipe water injection pressure resistance testing device, including a base plate 1. A first support platform 18, a second support platform 19, and a third support platform 20 are sequentially arranged on the base plate 1 from front to back. A conveyor belt 22 is installed on the first support platform 18. An extension component 5 is arranged above the third support platform 20, and a first electric push rod 3 is installed on the extension component 5. A stop block 2 is welded onto the base plate 1. A top plate 4 is arranged above the extension component 5 and fixed to the top of the wall. A second motor 6 is installed on the top plate 4. A first gear 7 is fixedly connected to the output shaft of the second motor 6. A second gear 8 is meshed with the rear side of the first gear 7. The second gear 8 and the top plate 4 are rotatably connected. A rack 33 is meshed with the front side of the first gear 7. A connecting frame 30 is fixedly connected to the rack 33. A water injection pipe 29 is fixedly connected to the top plate 4. The rack 33 and the connecting frame 30 are slidably connected to the top plate 4. A fixing frame 23 is welded to the connecting frame 30. A third electric push rod 24 is installed on the fixing frame 23. A first connecting block 25 is fixedly connected to the third electric push rod 24. An installation rod 26 is installed through the first connecting block 25. A second connecting block 28 is fixedly installed below the installation rod 26. A second spring 27 is fixedly connected between the second connecting block 28 and the first connecting block 25. A feeding assembly 21 is installed in the second support platform 19. When working, the feeding assembly 21 can convey a single steel pipe upward so as to realize the function of inspecting a single steel pipe one by one. At the same time, the device can automatically unload or load the steel pipe after the inspection is completed and the steel pipe to be inspected through the extension assembly 5, thereby improving the convenience of the device when using it.

[0041] A connecting component 9 is installed inside the second gear 8. A stud 10 is installed above the connecting component 9. An outer bushing 11 is threaded to the outside of the stud 10. A second connecting plate 13 is fixedly installed on the outer bushing 11. A guide rod 14 is welded to the bottom of the second connecting plate 13. A second electric push rod 15 is fixedly installed in the middle of the bottom of the top plate 4. A first pressure plate 16 is fixedly connected to the bottom of both the guide rod 14 and the second electric push rod 15. A second pressure plate 17 is installed on the first pressure plate 16. The second motor 6 drives the first gear 7 to rotate. The first gear 7 drives the second gear 8 to rotate and the rack 33 to move. The second gear 8 can rotate the stud 10 through the connecting component 9, thereby changing the initial height of the second connecting plate 13. The second connecting plate 13 will drive the first pressure plate 16 and the second pressure plate 17 on the guide rod 14 to move downward. When the steel pipe is pressed, the connecting component 9 causes the stud 10 to stop rotating, while the second gear 8 continues to slide. The rack 33 will drive the connecting frame 30 and the water injection pipe 29 to move, thereby sealing both ends of the steel pipe for water injection pressure resistance testing.

[0042] Example 2

[0043] like Figures 1-11As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes a high-end steel pipe water injection pressure resistance test device.

[0044] In this embodiment, the extension component 5 includes a first motor 501 fixedly mounted on the base plate 1. A first connecting cylinder 502 is keyed to the output shaft of the first motor 501. A spline rod 503 is fixedly mounted on the first connecting cylinder 502. A second connecting cylinder 504 is keyed to the outer side of the spline rod 503. Both the first connecting cylinder 502 and the second connecting cylinder 504 are provided with placement slots 505. The spline rod 503 and the second connecting cylinder 504 are rotatably connected to the first electric push rod 3. The first connecting cylinder 504 is driven by the first motor 501. The rotation of cylinder 502 drives the spline rod 503 and the second connecting cylinder 504 to rotate, so as to transport the steel pipe in the placement groove 505 to the detection area. Since the first motor 501 and the first connecting cylinder 502 are connected by a key, the first motor 501 can continuously drive the first connecting cylinder 502 to rotate when the first electric push rod 3 extends or shortens. This device can change the distance between the first connecting cylinder 502 and the second connecting cylinder 504 by extending or shortening the first electric push rod 3, so as to adapt to the use of steel pipes of different lengths.

[0045] In this embodiment, the connecting component 9 includes an outer ring 901 fixedly connected to the second gear 8. A connecting block 902 is rotatably installed inside the outer ring 901. A slot 903 is provided inside the connecting block 902. A locking block 904 is fitted on the inner wall of the slot 903. A first spring 907 is fixedly connected between the locking block 904 and the outer ring 901. The connecting block 902 and the stud 10 are fixedly connected. The first spring 907 can support the locking block 904, so that the locking block 904 can press the slot 903 on the connecting block 902. This causes the outer ring 901 to drive the connecting block 902 and the stud 10 to rotate. When the rotational resistance of the stud 10 is too great, the locking block 904 will compress the first spring 907, causing the locking block 904 to retract into the outer ring 901. At this time, the outer ring 901 will slide on the outside of the connecting block 902 so that the lateral sealing of the steel pipe can continue after the longitudinal compression of the steel pipe.

[0046] In this embodiment, a groove 905 is provided in the card block 904, and a protrusion 906 is fixedly connected in the outer ring 901. The card block 904 forms a sliding structure with the outer ring 901 through the protrusion 906 and the groove 905. The card block 904 can move horizontally through the protrusion 906 and the groove 905. The sliding structure on the device makes the card block 904 move more smoothly, ensuring the stability of the device during operation.

[0047] In this embodiment, a first connecting plate 12 is fixedly connected to the top of the stud 10. The second connecting plate 13 and the guide rod 14 form a lifting structure with the top plate 4 through the stud 10 and the outer bushing 11. A sleeve 32 is slidably installed on the top plate 4. A first connecting rod 31 is slidably installed inside the sleeve 32. The first connecting rod 31 is slidably installed on the connecting frame 30. The first connecting rod 31 and the sleeve 32 slide laterally. The sleeve 32 and the top plate 4, as well as the first connecting rod 31 and the connecting frame 30, slide longitudinally. When the stud 10 rotates, it can drive the second connecting plate 13 to move vertically up and down under the guidance of the guide rod 14, so that the device can press the steel pipe from top to bottom. The first connecting rod 31 and the sleeve 32 ensure that the connecting frame 30 can move straight.

[0048] In this embodiment, the first support platform 18, the second support platform 19, and the third support platform 20 are all divided into a left half and a right half. The connection between the left half and the right half of the first support platform 18, the second support platform 19, and the third support platform 20 is a sliding connection. The left half of the first support platform 18, the second support platform 19, and the third support platform 20 is fixedly connected to the second connecting cylinder 504 as an integral structure. The right half of the first support platform 18, the second support platform 19, and the third support platform 20 is fixedly connected to the first connecting cylinder 502 as an integral structure. When the distance between the first connecting cylinder 502 and the second connecting cylinder 504 changes, the distance between the left and right parts of the first support platform 18, the second support platform 19, and the third support platform 20 will also change to accommodate steel pipes of different lengths for support and transportation.

[0049] In this embodiment, the upper surfaces of the second support platform 19 and the third support platform 20 are both higher in the front and lower in the back, so that the steel pipe can automatically roll backward. The third support platform 20 is in close contact with the first connecting cylinder 502 and the second connecting cylinder 504. The placement grooves 505 are evenly distributed around the first connecting cylinder 502 and the second connecting cylinder 504. The circumferentially distributed placement grooves 505 are used to place the steel pipe. The steel pipe can be transported to the testing area by rotating the first connecting cylinder 502 and the second connecting cylinder 504.

[0050] In this embodiment, the feeding assembly 21 includes a third motor 2101 fixedly connected to the second support platform 19. An eccentric wheel 2102 is mounted on the output shaft of the third motor 2101. A lifting platform 2105 is slidably mounted on the second support platform 19. A moving groove 2103 is provided on the lifting platform 2105. A limit block 2104 is provided in the moving groove 2103. The limit block 2104 and the second support platform 19 are slidably connected. The eccentric wheel 2102 is driven to rotate by the third motor 2101. The rotation of the eccentric wheel 2102 will push the lifting platform 2105 upward. When the lifting platform 2105 moves upward, it will push the steel pipes upward one by one, so that the device can feed the material one by one.

[0051] In this embodiment, the conveyor belt 22 includes a fourth motor 2201 fixedly installed in the first support platform 18. A first synchronous pulley 2202 is fixedly installed on the output shaft of the fourth motor 2201. A synchronous belt 2203 is installed on the first synchronous pulley 2202. A second synchronous pulley 2204 is installed above the synchronous belt 2203. A rotating roller 2205 is fixedly connected to the second synchronous pulley 2204. The rotating roller 2205 and the first support platform 18 are rotatably connected. A track 2206 is installed on the outer side of the rotating roller 2205. Anti-slip grooves 2207 are equidistantly opened on the track 2206. The first synchronous pulley 2202 is driven to rotate by the fourth motor 2201. The first synchronous pulley 2202 will drive the second synchronous pulley 2204 and the rotating roller 2205 to rotate through the synchronous belt 2203, thereby causing the track 2206 to rotate and convey steel pipes in batches. The anti-slip grooves 2207 prevent the steel pipes from slipping on the track 2206.

[0052] In this embodiment, a first extension tube 34 is slidably installed inside the water injection pipe 29, and a second extension tube 35 is fixedly connected to the first extension tube 34. A third spring 36 is fixedly connected between the second extension tube 35 and the water injection pipe 29. The third spring 36 between the second extension tube 35 and the water injection pipe 29 can press the second extension tube 35 against one side of the steel pipe to be tested. The inner wall of the water injection pipe 29 is in contact with the outer walls of the first connecting block 25 and the second connecting block 28. An installation rod 26 is fixedly connected to the second connecting block 28. The installation rod 26 passes through the first connecting block 25 and can guide the first connecting block 25 and the second connecting block 28. When the first connecting block 25 moves downward, it will drive the second connecting block 28 to move downward, increasing the water pressure in the water injection pipe 29, thereby conducting a water injection pressure resistance test.

[0053] Specifically, this invention relates to a high-end steel pipe water injection pressure resistance testing device and method. First, as... Figure 1 , Figure 2 , Figure 7 and Figure 11As shown, the extension component 5 can adjust its length to accommodate different steel pipe lengths and can transport steel pipes. The first motor 501 drives the first connecting cylinder 502 to rotate, which in turn drives the splined rod 503 and the second connecting cylinder 504 to rotate, thus transporting the steel pipe in the placement slot 505 to the detection area. Since the first motor 501 and the first connecting cylinder 502 are keyed, the first motor 501 can continuously drive the first connecting cylinder 502 to rotate when the first electric push rod 3 extends or shortens. By extending or shortening the first electric push rod 3, the distance between the first connecting cylinder 502 and the second connecting cylinder 504 is changed to accommodate steel pipes of different lengths. Because the left and right halves of the first support platform 18, the second support platform 19, and the third support platform 20 are all slidably connected, the lengths of the first support platform 18, the second support platform 19, and the third support platform 20 will also change accordingly when the length of the extension component 5 changes. The steel pipes are transported from the first support platform 18 to the second support platform 19 via the conveyor belt 22. The fourth motor 2201 drives the first synchronous wheel 2202 to rotate. The first synchronous wheel 2202 drives the second synchronous wheel 2204 and the rotating roller 2205 to rotate via the synchronous belt 2203, so that the track 2206 rotates and transports the steel pipes in batches. The anti-slip groove 2207 prevents the steel pipes from slipping on the track 2206. The third motor 2101 drives the eccentric wheel 2102 to rotate. The rotation of the eccentric wheel 2102 will push the lifting platform 2105 upward. When the lifting platform 2105 moves upward, it will push the steel pipes upward one by one, so that the device can feed them one by one. The steel pipes on the second support platform 19 will be conveyed one by one to the third support platform 20 through the feeding component 21. The inclined surface of the third support platform 20 will be used to convey the steel pipes to the placement slots 505 of the first connecting cylinder 502 and the second connecting cylinder 504. The steel pipes will be conveyed to the testing area by the rotation of the first connecting cylinder 502 and the second connecting cylinder 504.

[0054] like Figures 1-10As shown, the first gear 7 is driven to rotate by the second motor 6. The first gear 7 drives the second gear 8 and the outer ring 901 on the connecting assembly 9 to rotate. When the second gear 8 and the outer ring 901 rotate, the first spring 907 can support the locking block 904. The locking block 904 presses against the locking groove 903 on the connecting block 902. The locking block 904 can move horizontally through the protrusion 906 and the groove 905, thereby causing the outer ring 901 to drive the connecting block 902 and the stud 10 to rotate. When the stud 10 rotates, the outer bushing 11 and the second connecting plate 13 move vertically under the guidance of the guide rod 14, so that the steel pipe in the area to be tested can be pressed tightly by the first pressure plate 16 and the second pressure plate 17 at the bottom of the guide rod 14. After the steel pipe is pressed, the second gear 8 continues to rotate. When the rotation resistance of the stud 10 is too large, the inner wall of the slot 903 causes the locking block 904 to compress the first spring 907, so that the locking block 904 retracts into the outer ring 901. At this time, the outer ring 901 will slide on the outside of the connecting block 902, so that the lateral sealing of the steel pipe can continue after the longitudinal pressing of the steel pipe. The connecting component 9 will slide on the stud 10, so that the steel pipe is always kept in a fixed state while the first gear 7 passes through. Continuous rotation drives the rack 33 to pull the water injection pipe 29 and the connecting frame 30 to move. The first connecting rod 31 slides in the pipe sleeve 32, and the water injection pipe 29 presses against the steel pipe. The side of the steel pipe away from the water injection pipe 29 abuts against the stop block 2. At this time, both ends of the steel pipe remain closed. The third electric push rod 24 on the extension fixing frame 23 drives the first connecting block 25 to move downward. The first connecting block 25 gradually presses against the second connecting block 28 through the second spring 27. The second connecting block 28 gradually increases the water pressure in the water injection pipe 29 and the steel pipe, completing the water injection pressure resistance test of the steel pipe. After the test is completed, the first connecting cylinder 502 and the second connecting cylinder 504 on the extension assembly 5 rotate to transport the steel pipe to the rear of the device. During the water injection pressure resistance test, the device can also extend the second electric push rod 15 to drive the first pressure plate 16 and the second pressure plate 17 to move downward and press down on the steel pipe, realizing the pressure test from the outside to the inside.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-end steel pipe water injection pressure resistance testing device, comprising a base plate (1), characterized in that: The base plate (1) is provided with a first support platform (18), a second support platform (19), and a third support platform (20) arranged sequentially from front to back. A conveyor belt (22) is installed on the first support platform (18). An extension assembly (5) is arranged above the third support platform (20). A first electric push rod (3) is installed on the extension assembly (5). A stop block (2) is welded on the base plate (1). A top plate (4) is arranged above the extension assembly (5). A second motor (6) is installed on the top plate (4). A first gear (7) is fixedly connected to the output shaft of the second motor (6). A second gear (8) is meshed with the rear side of the first gear (7). The second gear (8) is rotatably connected to the top plate (4). A rack is meshed with the front side of the first gear (7). (33), a connecting frame (30) is fixedly connected to the rack (33), a water injection pipe (29) is fixedly connected to the connecting frame (30), the rack (33) and the connecting frame (30) are slidably connected to the top plate (4), a fixing frame (23) is welded to the connecting frame (30), a third electric push rod (24) is installed on the fixing frame (23), a first connecting block (25) is fixedly connected to the third electric push rod (24), an installation rod (26) is provided through the first connecting block (25), a second connecting block (28) is fixedly provided below the installation rod (26), a second spring (27) is fixedly connected between the second connecting block (28) and the first connecting block (25), and a feeding assembly (21) is installed in the second support platform (19); A connecting component (9) is installed inside the second gear (8). A stud (10) is installed above the connecting component (9). An outer bushing (11) is threaded to the outside of the stud (10). A second connecting plate (13) is fixedly installed on the outer bushing (11). A guide rod (14) is welded to the bottom of the second connecting plate (13). A second electric push rod (15) is fixedly installed in the middle of the bottom of the top plate (4). A first pressure plate (16) is fixedly connected to the bottom of both the guide rod (14) and the second electric push rod (15). A second pressure plate (17) is installed on the first pressure plate (16). The connecting assembly (9) includes an outer ring (901) fixedly connected to the second gear (8), a connecting block (902) rotatably mounted inside the outer ring (901), a slot (903) opened inside the connecting block (902), a locking block (904) fitted on the inner wall of the slot (903), a first spring (907) fixedly connected between the locking block (904) and the outer ring (901), and a fixed connection between the connecting block (902) and the stud (10); The card block (904) has a groove (905) inside, and a protruding rod (906) is fixedly connected inside the outer ring (901). The card block (904) and the outer ring (901) form a sliding structure through the protruding rod (906) and the groove (905); The top of the stud (10) is fixedly connected to a first connecting plate (12), and the second connecting plate (13) and the guide rod (14) are connected to the top plate (4) through the stud (10) and the outer bushing (11) to form a lifting structure.

2. The high-end steel pipe water injection pressure resistance testing equipment according to claim 1, characterized in that, The extension assembly (5) includes a first motor (501) fixedly mounted on the base plate (1). A first connecting cylinder (502) is keyed to the output shaft of the first motor (501). A spline rod (503) is fixedly mounted on the first connecting cylinder (502). A second connecting cylinder (504) is keyed to the outer side of the spline rod (503). Placement slots (505) are provided on both the first connecting cylinder (502) and the second connecting cylinder (504). The spline rod (503) and the second connecting cylinder (504) are rotatably connected to the first electric push rod (3).

3. The high-end steel pipe water injection pressure resistance testing equipment according to claim 2, characterized in that, The first support platform (18), the second support platform (19), and the third support platform (20) are all divided into a left half and a right half. The left half and the right half of the first support platform (18), the second support platform (19), and the third support platform (20) are connected by a sliding connection. The left half of the first support platform (18), the second support platform (19), and the third support platform (20) are fixedly connected to the second connecting cylinder (504) as an integral structure. The right half of the first support platform (18), the second support platform (19), and the third support platform (20) are fixedly connected to the first connecting cylinder (502) as an integral structure.

4. The high-end steel pipe water injection pressure resistance testing equipment according to claim 3, characterized in that, The upper surfaces of the second support platform (19) and the third support platform (20) are both higher in the front and lower in the back. The third support platform (20) is in close contact with the first connecting cylinder (502) and the second connecting cylinder (504). The placement grooves (505) are evenly distributed along the circumference of the first connecting cylinder (502) and the second connecting cylinder (504).

5. The high-end steel pipe water injection pressure resistance testing equipment according to claim 4, characterized in that, The feeding assembly (21) includes a third motor (2101) fixedly connected to the second support platform (19). An eccentric wheel (2102) is mounted on the output shaft of the third motor (2101). A lifting platform (2105) is slidably mounted on the second support platform (19). A moving groove (2103) is provided on the lifting platform (2105). A limit block (2104) is provided in the moving groove (2103). The limit block (2104) and the second support platform (19) are slidably connected.

6. The high-end steel pipe water injection pressure resistance testing equipment according to claim 1, characterized in that, A first extension tube (34) is slidably installed inside the water injection pipe (29). A second extension tube (35) is fixedly connected to the first extension tube (34). A third spring (36) is fixedly connected between the second extension tube (35) and the water injection pipe (29). The inner wall of the water injection pipe (29) is in contact with the outer walls of the first connecting block (25) and the second connecting block (28). An installation rod (26) is fixedly connected to the second connecting block (28). The installation rod (26) passes through the first connecting block (25).

7. A method for testing the water injection pressure resistance of high-end steel pipes, using the water injection pressure resistance testing equipment for high-end steel pipes as described in claim 1, characterized in that, Includes the following steps: S1: Adjust the extension length of the extension component (5) according to the length of the steel pipe. When the length of the extension component (5) changes, the lengths of the first support platform (18), the second support platform (19) and the third support platform (20) will also change accordingly. S2: The steel pipe is conveyed from the first support platform (18) to the second support platform (19) by the conveyor belt (22). The steel pipe on the second support platform (19) will be conveyed one by one to the third support platform (20) by the feeding assembly (21). The steel pipe is then conveyed to the extension assembly (5) by the inclined surface of the third support platform (20). The steel pipe is then conveyed to the inspection area by the extension assembly (5). S3: The first gear (7) is driven to rotate by the second motor (6). The first gear (7) drives the second gear (8) and the connecting assembly (9) to rotate. When the second gear (8) and the connecting assembly (9) rotate, the stud (10) will rotate, thereby changing the height of the outer bushing (11), the second connecting plate (13) and the guide rod (14) so ​​that the steel pipe in the area to be tested can be pressed by the first pressure plate (16) and the second pressure plate (17) at the bottom of the guide rod (14). After the steel pipe is pressed, the second gear (8) continues to rotate. When the rotation resistance of the stud (10) is too large, the connecting assembly (9) will slide on the stud (10), so that the steel pipe always remains in a fixed state. S4: The continuous rotation of the first gear (7) will cause the rack (33) to pull the water injection pipe (29) and the connecting frame (30) to move. The water injection pipe (29) will press the steel pipe. The side of the steel pipe away from the water injection pipe (29) will abut against the stop block (2). At this time, both ends of the steel pipe are closed. The first connecting block (25) will be driven to move downward by the third electric push rod (24) on the extension fixing frame (23). The first connecting block (25) will gradually press the second connecting block (28) through the second spring (27). The second connecting block (28) will gradually increase the water pressure in the water injection pipe (29) and the steel pipe to complete the water injection pressure test of the steel pipe. After the test is completed, the steel pipe will be transported to the rear of the device through the extension component (5).

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