Steel pipe coil water pressure detection system

Abstract

The present application relates to the technical field of steel pipe detection, and more particularly to a steel pipe coil water pressure detection system, comprising a control room and a hydrostatic test room, wherein a coil is arranged in the hydrostatic test room, a mobile trolley assembly and a guide rail are arranged at the bottom of the coil, one end of the guide rail is arranged outside the hydrostatic test room, an auxiliary system is arranged above the guide rail, the coil is lifted and moved outside the hydrostatic test room to the mobile trolley assembly by the auxiliary system, and the mobile trolley assembly enters the hydrostatic test room along the guide rail. The steel pipe coil water pressure detection system is cooperatively arranged by the auxiliary system and the mobile trolley assembly, the coil is clamped and fixed by the auxiliary system during the whole loading and unloading process, and the coil is slowly moved by lifting, so that the coil or pipeline is effectively prevented from being randomly rolled and placed due to the lack of any blocking or protection measures, and a large impact force is avoided, and safety hazards are avoided.

Description

Technical Field

[0001] This invention relates to the field of steel pipe testing technology, and in particular to a steel pipe coil water pressure testing system. Background Technology

[0002] Umbilical cables typically consist of electrical cables, optical fibers, steel pipes for transporting chemicals and hydraulic fluids, and an outer protective layer (steel pipe and composite materials). They range in length from a few hundred meters to tens of thousands of meters and primarily function to transport chemicals, hydraulic fluids, electricity, and signals, serving as the lifeline of offshore oil and gas production systems. Deep-sea umbilical cables are composed of many tubes. The steel pipes in the umbilical cable are generally made of super duplex stainless steel. Before manufacturing a deep-sea umbilical cable, each seamless steel pipe, approximately 10 meters long, is butt-welded and coiled into a roll, typically several kilometers long, with a maximum length of 20 kilometers. According to production process requirements, after coiling, a hydrostatic test of up to 120 MPa is conducted to determine if any leaks are present. For coils with leaks, the specific location must be identified and re-welded, or the coil must be cut and re-welded.

[0003] To perform water pressure testing on coils, various water pressure testing devices have been provided in the prior art. However, some of these devices require manual handling during loading and unloading, while others have overly simple structures that pose safety hazards. For example, a steel pipe water pressure testing device disclosed in the prior art (application number: CN204980292) achieves automatic loading of steel pipes through a steel pipe support plate, a lifting plate, and a first connecting rod, and automatic unloading through a rocker plate, a telescopic hydraulic frame, and a second connecting rod. This results in a high degree of automation, reducing the labor intensity of workers and improving efficiency. Although this technology can achieve automatic loading and unloading of steel pipes during water pressure testing, the following technical problems still exist: When the steel pipe is unloaded in the rocker plate, the tilting of the rocker plate causes the steel pipe to roll out. Since there are no obstructions or protective measures, the steel pipe is prone to colliding with other objects or other steel pipes stored in the trough, resulting in a large impact force and posing a significant safety hazard. Summary of the Invention

[0004] The main objective of this invention is to overcome the problem in existing technologies where, during unloading of steel pipes within a rocker arm, the tilting of the rocker arm causes the steel pipes to roll out, resulting in significant impacts and safety hazards due to the lack of any protective measures. The invention provides a steel pipe coil water pressure testing system. This system boasts advantages such as a robust structure, high degree of automation, simple operation, reliable performance, and convenient control.

[0005] The technical solution adopted by the present invention to achieve its technical objective is: a steel pipe coil water pressure testing system, including a control room and a water pressure test chamber. A coil is installed inside the water pressure test chamber. A moving trolley assembly and a guide rail are installed at the bottom of the coil. One end of the guide rail is located outside the water pressure test chamber, and an auxiliary system is installed above it. The coil is lifted and moved to the moving trolley assembly from outside the water pressure test chamber by the auxiliary system. The coil is fixedly installed on a moving plate in the moving trolley assembly by steel cables. The moving trolley assembly enters the water pressure test chamber along the guide rail.

[0006] A transition pipe with a tapered sealing joint is welded to the head and tail of the coil. After sealing the two ends of the coil, a water pressure test is conducted in the water pressure test chamber. The pipeline connection adopts a welded transition joint plus tapered sealing thread connection. The transition pipe is connected to the test system with a tapered sealing thread. After the pressure test, the transition pipe can be cut off from the weld. A 1m long transition pipe can be used more than 50 times.

[0007] Preferably, the control room is equipped with an electrical control cabinet and an operating console, through which the various instruments and equipment in the water pressure test chamber are operated and monitored.

[0008] The hydraulic pressure test chamber is equipped with a hydraulic station, booster, water injection pump, test water tank, purging system and automatic door. Monitoring devices are also installed at the four corners of the hydraulic pressure test chamber.

[0009] The water injection pump uses a sub-high pressure pump to increase the water injection speed and expel air from the coil. Because the coil is thin and long, the water injection resistance is large and the water flow speed is slow. Using conventional static pressure water injection, low-pressure water pump water injection, or tap water pipeline water injection is inefficient and slow. Moreover, the air in the pipe may not be completely expelled, affecting the authenticity of the pressure test.

[0010] A purging system is used to remove water accumulated in the coil after a water pressure test. Heated compressed air is introduced into the coil; the hot air accelerates water vaporization and improves purging efficiency. The main component of the purging system is the heater, which consists of an air coil (stainless steel or copper), an electric heating element, a protective tank, a temperature controller, a stainless steel flexible metal hose, and connectors.

[0011] Preferably, the auxiliary system includes a frame plate bracket, inside which a lead screw and a plate are provided. The lead screw and the plate are threadedly connected. One end of the lead screw is fixedly connected to a motor, which is fixedly installed on the frame plate bracket. The motor drives the lead screw to rotate, causing the plate to move back and forth inside the frame plate bracket.

[0012] Telescopic cylinders are fixedly installed on the front and rear sides of the bottom of the plate, and a telescopic rod is fixedly connected to one end of the telescopic cylinder; the telescopic cylinder can drive the telescopic rod to move, so that the baffle and the two end side walls of the coil can be in close contact or separated.

[0013] One end of the telescopic cylinder is also equipped with a connecting block for relative sliding connection. The connecting block is fixedly connected to the bottom of the plate. The connecting block can support one end of the telescopic rod, so as to avoid the telescopic cylinder being too heavy after connecting the telescopic rod and other components, which would be detrimental to the stable use of the telescopic cylinder.

[0014] A baffle is provided on one side of the movable end of the telescopic rod. One side of the baffle contacts the coil, and the other side is fixedly connected to a cross-shaped concave frame plate. An operating turntable is provided on one side of the cross-shaped concave frame plate, and a clamping plate is slidably connected inside it. A roller is fixedly connected to one end of the clamping plate, and a guide post is fixedly connected to the other end. The guide post is confined within an arc-shaped groove inside the operating turntable. By rotating the operating turntable, the guide post moves from one end of the arc-shaped groove to the other end, causing the guide post to drive the clamping plate to slide back and forth within the cross-shaped concave frame plate.

[0015] When the clamp slides back and forth in the cross-shaped concave frame, the rollers can retract and extend the coil, thereby contacting or separating the two ends of the coil. The rollers have grooves inside that can match the two ends of the coil. When the rollers contact the two ends of the coil, the grooves of the rollers are just locked onto the two ends of the coil.

[0016] Preferably, a first connecting rod is fixedly connected to one side of the middle of the operating turntable, and a second connecting rod is fixedly connected to the other side. One end of the first connecting rod passes through the cross-shaped concave frame plate and the baffle plate. The first connecting rod is threadedly connected to the baffle plate and externally fitted with a first bearing. When the operating turntable is rotated, one end of the first connecting rod can penetrate deeper into the baffle plate as the operating turntable rotates, and the first bearing can be inserted into the small holes at both ends of the coil. At the same time, under the action of the guide post, the clamping plate and the roller retract, and the roller contacts the two ends of the coil, restricting the two ends of the coil.

[0017] One end of the second connecting rod is fixedly connected to the movable end of the telescopic rod, and a second bearing is provided between the two. The second bearing allows the operating turntable to rotate freely without restriction.

[0018] Preferably, the mobile trolley assembly further includes a first rod and a second rod, with one end of the first rod and the second rod being movably hinged together, and a fifth rod being hinged to the other end of the first rod;

[0019] The second rod is hinged to a third rod at one end, and a fourth rod is hinged to one end of the third rod.

[0020] Both the fourth and fifth rods have insertion holes at one end, and the fourth and fifth rods are connected by using pins that engage with the insertion holes.

[0021] By using the insertion holes and pins, the first, second, third, fourth, and fifth rods can be connected around both ends of the coil to restrict and fix the coil.

[0022] Preferably, the hinge joints of the first and fifth rods and the hinge joints of the second and third rods are all fixedly supported above the movable plate by support rods. By setting the support rods, the hinge joints of the first and second rods can collapse, thereby storing both ends of the coil.

[0023] Preferably, one end of the first rod is provided with a movable groove, and one end of the second rod is movably hinged in the movable groove. The movable groove can extend the movable distance between the first rod and the second rod, so that a collapse can be formed between the first rod and the second rod.

[0024] Preferably, a pressure plate is fixedly connected at the hinge joint of the first rod and the second rod;

[0025] A convex rod is fixedly connected to the top of the movable plate, and a spring is sleeved on one end of the convex rod;

[0026] As the pressure plate moves downward, it presses against the spring. The spring and the pressure plate cooperate to form a buffer. When the spring is fully compressed, the pressure plate is supported by the convex rod.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: This steel pipe coil water pressure testing system, through the coordinated arrangement of an auxiliary system and a moving trolley assembly, clamps and fixes the coil or steel pipe during the water pressure testing process, slowly moving it onto the moving trolley assembly. After loading, the moving trolley assembly slides along the guide rail into the water pressure testing chamber for water pressure testing. Similarly, during unloading, the auxiliary system clamps and fixes the coil, slowly moving it out of the moving trolley assembly. Throughout the entire loading and unloading process, the auxiliary system clamps and fixes the coil, slowly moving it. This effectively prevents the coil or pipe from rolling and falling haphazardly during unloading due to a lack of obstruction or protective measures, thus avoiding potential safety hazards.

[0028] This steel pipe coil water pressure testing system has a highly flexible structure. The auxiliary system can fix and clamp coils of different diameters. When the diameters of the coils are different, the rods in the moving trolley assembly can be selected as needed. The rods can not be used as fixed restrictions, but only as slide rails to assist in loading and unloading the coils. The rods are hinged in multiple places, allowing them to be unfolded and folded in multiple places, making them flexible and versatile.

[0029] This steel pipe coil water pressure testing system uses a welded transition joint with tapered sealing threaded connection for pipe connection. It borrows the process of coil butt welding, without increasing equipment or cost. It is more reliable and safer than insertion or clamping connection. In addition, it is lightweight and does not require special tools. The pipe connecting the equipment and the transition pipe is a flexible hose, which is not affected by the connection location and site.

[0030] In summary, this steel pipe coil water pressure testing system has a rigorous structure, a high degree of automation, simple operation, reliable performance, and convenient control. Attached Figure Description

[0031] Figure 1 This is a top view of the coil water pressure testing system.

[0032] Figure 2 This is a top view of the coil water pressure detection system and its auxiliary systems.

[0033] Figure 3 This is a side view of the auxiliary system and the mobile trolley assembly in the coil-on-board state.

[0034] Figure 4 This is a schematic diagram of the main structure of the coil and auxiliary system components.

[0035] Figure 5 This is a side view of the auxiliary system and the mobile trolley assembly in the state where the coil is lifted onto the vehicle.

[0036] Figure 6 This is a side view of some components of the auxiliary system.

[0037] in:

[0038] 1-Control room; 2-Electrical control cabinet; 3-Hydraulic station; 4-Booster; 5-Water injection pump; 6-Test water tank; 7-Purge system; 8-Coil; 9-Hydraulic test chamber; 10-Monitoring device; 11-Automatic door; 12-Guide rail; 13-Operating panel; 14-Steel cable; 15-Frame bracket; 1501-Flat plate; 1502-Screw rod; 1503-Telescopic cylinder; 1504-Telescopic rod; 1505-Baffle plate; 1506-Cross concave frame plate; 1507-Clamping plate; 150 8-Roller; 1509-Operating turntable; 1510-Guide post; 1511-First connecting rod; 1512-Second connecting rod; 16-Transition tube; 17-Moving plate; 1701-First rod body; 1702-Second rod body; 1703-Third rod body; 1704-Fourth rod body; 1705-Fifth rod body; 1706-Pin; 1707-Insertion hole; 1708-Support rod; 1709-Pressure plate; 1710-Moving groove; 1711-Convex rod; 1712-Spring. Detailed Implementation

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention. Example

[0042] Please see Figure 1-2 A water pressure testing system for steel pipe coils includes a control room 1 and a water pressure test chamber 9. The control room 1 is equipped with an electrical control cabinet 2 and an operating console 13, which are used to operate and monitor the various instruments and equipment in the water pressure test chamber 9.

[0043] The hydraulic pressure test chamber 9 is equipped with a hydraulic station 3, a booster 4, a water injection pump 5, a test water tank 6, a purging system 7, and an automatic door 11. Monitoring devices 10 are also installed at the four corners of the hydraulic pressure test chamber 9.

[0044] The hydraulic pressure test chamber 9 is equipped with a coil 8. The bottom of the coil 8 is equipped with a moving trolley assembly and a guide rail 12. One end of the guide rail 12 is located outside the hydraulic pressure test chamber 9, and an auxiliary system is installed above it. The coil 8 is lifted and moved to the moving trolley assembly from outside the hydraulic pressure test chamber 9 by the auxiliary system. The coil 8 is fixedly installed on the moving plate 17 in the moving trolley assembly by steel cable 14. The moving trolley assembly enters the hydraulic pressure test chamber 9 along the guide rail 12.

[0045] A transition pipe 16 with a tapered sealing joint is welded to the head and tail of the coil 8. After sealing the two ends of the coil 8, a water pressure test is conducted in the water pressure test chamber 9. The pipeline connection adopts a welded transition joint plus tapered sealing thread connection. The transition pipe 16 is connected to the test system with a tapered sealing thread. After the pressure test, the transition pipe 16 can be cut off from the weld. A 1m long transition pipe 16 can be used more than 50 times.

[0046] Specifically, the water injection pump 5 uses a sub-high pressure pump to increase the water injection speed and expel the air in the coil 8. Because the coil 8 is thin and long, the water injection resistance is large and the water flow speed is slow. Using conventional static pressure water injection, low pressure water pump water injection, or tap water pipeline water injection is inefficient and slow. Moreover, the air in the pipe may not be completely expelled, affecting the authenticity of the pressure test.

[0047] The purging system 7 is used to remove the water accumulated in the coil 8 after the water pressure test. The compressed air is heated and then introduced into the coil 8. The hot air can accelerate the vaporization of water and improve the purging efficiency. The main component of the purging system 7 is the heater, which consists of a ventilation coil (stainless steel or copper tube), an electric heating element, a protective tank, a temperature controller, a stainless steel metal hose, and connectors.

[0048] Before use, the automatic door 11 must be closed. During the test, the pressure is increased in stages, with each stage being 20 MPa, up to 120 MPa. The pressure holding time for each stage and when the required test pressure is reached is 10 minutes.

[0049] In the closed pressure test chamber 9, the air in the coil 8 is first purged and filled with water. After sealing both ends of the coil, the pressure is increased. Once the pressure inside the coil reaches the set value, the pressure increase port is closed and static pressure is maintained. If the pressure drop is less than the allowable value (or the pressure drop is zero) within the specified time, the coil is qualified. Example

[0050] Please see Figure 2-6 Based on the above embodiments, the auxiliary system of the steel pipe coil water pressure testing system includes a frame plate support 15. The frame plate support 15 is provided with a lead screw 1502 and a plate 1501. The lead screw 1502 and the plate 1501 are threadedly connected. One end of the lead screw 1502 is fixedly connected to a motor. The motor is fixedly installed on the frame plate support 15. The motor drives the lead screw 1502 to rotate, causing the plate 1501 to move back and forth inside the frame plate support 15.

[0051] Telescopic cylinders 1503 are fixedly installed on the front and rear sides of the bottom of the flat plate 1501. One end of the telescopic cylinder 1503 is fixedly connected to a telescopic rod 1504. The telescopic cylinder 1503 can drive the telescopic rod 1504 to move, so that the baffle 1505 can be in close contact with or separated from the two end side walls of the coil 8.

[0052] One end of the telescopic cylinder 1503 is also provided with a connecting block for relative sliding connection. The connecting block is fixedly connected to the bottom of the plate 1501. The connecting block can support one end of the telescopic rod 1504, so as to avoid the telescopic cylinder 1503 becoming too heavy after connecting the telescopic rod 1504 and other components, which would be detrimental to the stable use of the telescopic cylinder 1503.

[0053] A baffle 1505 is provided on one side of the movable end of the telescopic rod 1504. One side of the baffle 1505 is in contact with the coil 8, and the other side is fixedly connected to a cross-shaped concave frame plate 1506. An operating turntable 1509 is provided on one side of the cross-shaped concave frame plate 1506, and a clamping plate 1507 is slidably connected inside it. A roller 1508 is fixedly connected to one end of the clamping plate 1507, and a guide post 1510 is fixedly connected to the other end. The guide post 1510 is confined within an arc-shaped groove inside the operating turntable 1509. By rotating the operating turntable 1509, the guide post 1510 moves from one end of the arc-shaped groove to the other end, causing the guide post 1510 to drive the clamping plate 1507 to slide back and forth within the cross-shaped concave frame plate 1506.

[0054] When the clamping plate 1507 slides back and forth within the cross-shaped concave frame plate 1506, the roller 1508 can perform a retracting action on the coil 8, thereby allowing the roller 1508 to contact or separate from both ends of the coil 8. The roller 1508 has a groove inside that can match the two ends of the coil 8. When the roller 1508 contacts the two ends of the coil 8, the groove of the roller 1508 is just locked at both ends of the coil 8.

[0055] Furthermore, a first connecting rod 1511 is fixedly connected to one side of the middle of the operating turntable 1509, and a second connecting rod 1512 is fixedly connected to the other side. One end of the first connecting rod 1511 passes through the cross-shaped concave frame plate 1506 and the baffle 1505. The first connecting rod 1511 is threadedly connected to the baffle 1505 and is externally fixedly sleeved with a first bearing. When the operating turntable 1509 is rotated, one end of the first connecting rod 1511 can penetrate deeper into the baffle 1505 as the operating turntable 1509 rotates, and the first bearing can be inserted into the small holes at both ends of the coil 8. At the same time, under the action of the guide post 1510, the clamping plate 1507 and the roller 1508 retract. The roller 1508 contacts the two ends of the coil 8, restricting the two ends of the coil 8.

[0056] One end of the second connecting rod 1512 is fixedly connected to the movable end of the telescopic rod 1504, and a second bearing is provided between the two. Through the setting of the second bearing, the operating turntable 1509 can rotate freely without restriction.

[0057] Specifically, in use, the position of the baffle 1505 is adjusted by extending or retracting the moving plate 1501 and the telescopic rod 1504, aligning the baffle 1505 with the two end sidewalls of the coil 8. Then, the telescopic cylinder 1503 moves the telescopic rod 1504, ensuring tight contact between the baffle 1505 and the two end sidewalls of the coil 8. Finally, the operating turntable 1509 is manually rotated, allowing the first bearing at one end of the first connecting rod 1511 to be inserted into the small holes at both ends of the coil 8. Simultaneously, the guide post 1510... Under the action, the clamping plate 1507 and the roller 1508 retract, and the roller 1508 contacts the two ends of the coil 8. The groove of the roller 1508 is just stuck at the two ends of the coil 8, restricting the two ends of the coil 8. Finally, the motor drives the drive screw 1502 to rotate, so that the plate 1501 moves left and right in the frame bracket 15. With the up and down extension of the telescopic rod 1504, the plate 1501 and the telescopic rod 1504 and other components finally drive the coil 8 to roll onto the moving trolley assembly.

[0058] The solution in this embodiment can be selectively combined with solutions in other embodiments. Example

[0059] Please see Figure 2-6 Based on the above embodiments, the steel pipe coil water pressure testing system, the mobile trolley assembly also includes a first rod 1701 and a second rod 1702, one end of the first rod 1701 and the second rod 1702 are movably hinged, and the other end of the first rod 1701 is hinged to a fifth rod 1705.

[0060] The second rod 1702 is hinged to the other end of the third rod 1703, and the third rod 1703 is hinged to the other end of the fourth rod 1704.

[0061] Both the fourth rod 1704 and the fifth rod 1705 have a socket 1707 at one end. The fourth rod 1704 and the fifth rod 1705 are connected by a pin 1706 that engages with the socket 1707.

[0062] By using the insertion hole 1707 and the pin 1706, the first rod 1701, the second rod 1702, the third rod 1703, the fourth rod 1704 and the fifth rod 1705 can be connected around the two ends of the coil 8 to restrict and fix the coil 8.

[0063] Furthermore, the hinge joints of the first rod 1701 and the fifth rod 1705, and the hinge joints of the second rod 1702 and the third rod 1703 are all fixedly supported above the moving plate 17 by the support rod 1708. By setting the support rod 1708, the hinge joints of the first rod 1701 and the second rod 1702 can collapse, thereby storing both ends of the coil 8.

[0064] Furthermore, one end of the first rod 1701 is provided with a movable groove 1710, and one end of the second rod 1702 is movably hinged in the movable groove 1710. The movable groove 1710 can extend the movable distance between the first rod 170 and the second rod 1702, so that a collapse can be formed between the first rod 170 and the second rod 1702.

[0065] Furthermore, a pressure plate 1709 is fixedly connected to the hinge joint of the first rod 1701 and the second rod 1702;

[0066] A convex rod 1711 is fixedly connected to the top of the movable plate 17, and a spring 1712 is sleeved on one end of the convex rod 1711;

[0067] As the pressure plate 1709 moves downward, it presses against the spring 1712. The spring 1712 and the pressure plate 1709 cooperate to form a buffer. When the spring 1712 is compressed to its maximum, the pressure plate 1709 is supported by the convex rod 1711.

[0068] Specifically, in use, with the help of the auxiliary system, the coil 8 is slowly moved above the first rod 1701 and the second rod 1702. Under the weight of the coil 8 and the action of the telescopic rod 1504, the coil 8 is placed in a position that creates a collapse between the first rod 1701 and the second rod 1702, thus restricting both ends of the coil 8. Then, by operating the auxiliary system, the auxiliary system is moved to the left side of the frame bracket 1, and the third rod 1703, the fourth rod 1704, and the fifth rod 1705 are connected around the two ends of the coil 8. The fourth rod 1704 and the fifth rod 1705 are connected through the insertion hole 1707 and the pin 1706, thus restricting and fixing both ends of the coil 8.

[0069] After the two ends of the coil 8 are fixed, one end of the steel cable 14 is fixed to the coil 8 as needed, and the other end is tied to the moving plate 17. The moving plate 17 enters the water pressure test chamber 9 under the action of the guide rail 12, thereby sending the coil 8 into the water pressure test chamber 9 for water pressure testing.

[0070] After the water pressure test of coil 8 is completed, the third rod 1703, the fourth rod 1704 and the fifth rod 1705 are unfolded. Using the auxiliary system, coil 8 is moved to the right side of frame plate bracket 1. By operating turntable 1509, the two ends of coil 8 are released from the restriction of roller 1508. Finally, telescopic cylinder 1503 drives telescopic rod 1504 to move, so that baffle 1505 is separated from the two end side walls of coil 8. After the water pressure test, coil 8 is taken out and the water pressure test of the next coil 8 is carried out.

[0071] It should be noted that a sliding groove is provided inside one side of the first rod 1701, the second rod 1702, the third rod 1703, the fourth rod 1704, and the fifth rod 1705. When the five rods are unfolded, the coil 8 can roll along the sliding groove to the top of the first rod 1701 and the second rod 1702 under the action of the auxiliary system. Furthermore, when the two ends of the coil 8 are restricted and fixed by the five rods, the sliding groove makes it easier to connect the rods to the two ends of the coil 8 for further restriction.

[0072] The solution in this embodiment can be selectively combined with solutions in other embodiments.

[0073] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural, procedural, or functional transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A water pressure testing system for steel pipe coils, comprising a control room (1) and a water pressure testing room (9), characterized in that: The water pressure test chamber (9) is equipped with a coil (8). The bottom of the coil (8) is equipped with a mobile trolley assembly and a guide rail (12). One end of the guide rail (12) is located outside the water pressure test chamber (9), and an auxiliary system is provided above it. The coil (8) is lifted and moved to the mobile trolley assembly from outside the water pressure test chamber (9) by the auxiliary system. The coil (8) is fixedly installed on the mobile plate (17) in the mobile trolley assembly by a steel cable (14). The mobile trolley assembly enters the water pressure test chamber (9) along the guide rail (12). A transition pipe (16) with a tapered sealing joint is welded to the head and tail of the coil (8). After sealing the two ends of the coil (8), a water pressure test is performed in the water pressure test chamber (9). The auxiliary system includes a frame plate bracket (15), and a lead screw (1502) and a flat plate (1501) are provided inside the frame plate bracket (15). Telescopic cylinders (1503) are fixedly installed on the front and rear sides of the bottom of the flat plate (1501), and a telescopic rod (1504) is fixedly connected to one end of the telescopic cylinder (1503). A baffle (1505) is provided on one side of the movable end of the telescopic rod (1504). One side of the baffle (1505) is in contact with the coil (8), and the other side is fixedly connected to a cross-shaped concave frame plate (1506). An operating turntable (1509) is provided on one side of the cross-shaped concave frame plate (1506), and a clamping plate (1507) is slidably connected inside it. A roller (1508) is fixedly connected to one end of the clamping plate (1507), and a guide post (1510) is fixedly connected to the other end. The guide post (1510) is restricted to an arc-shaped groove inside the operating turntable (1509). By rotating the operating turntable (1509), the guide post (1510) moves from one end of the arc-shaped groove to the other end, so that the guide post (1510) drives the clamping plate (1507) to slide back and forth inside the cross-shaped concave frame plate (1506).

2. The water pressure testing system for steel pipe coils according to claim 1, characterized in that: The control room (1) is equipped with an electrical control cabinet (2) and an operating console (13). The hydraulic test chamber (9) is equipped with a hydraulic station (3), a booster (4), a water injection pump (5), a test water tank (6), a purging system (7), and an automatic door (11). Monitoring devices (10) are also installed at the four corners of the hydraulic test chamber (9).

3. The water pressure testing system for steel pipe coils according to claim 1, characterized in that: The operating turntable (1509) has a first connecting rod (1511) fixedly connected to one side of its middle end and a second connecting rod (1512) fixedly connected to the other side. One end of the first connecting rod (1511) passes through the cross-shaped concave frame plate (1506) and the baffle (1505). The first connecting rod (1511) is threadedly connected to the baffle (1505) and has a first bearing fixedly sleeved on its exterior. One end of the second connecting rod (1512) is fixedly connected to the movable end of the telescopic rod (1504), and a second bearing is provided between the two.

4. The water pressure testing system for steel pipe coils according to claim 1, characterized in that: The mobile trolley assembly also includes a first rod (1701) and a second rod (1702), with one end of the first rod (1701) and the second rod (1702) being hinged together, and a fifth rod (1705) being hinged to the other end of the first rod (1701). The second rod (1702) is hinged to a third rod (1703) at one end, and a fourth rod (1704) is hinged to one end of the third rod (1703). Both the fourth rod (1704) and the fifth rod (1705) have a socket (1707) at one end. The fourth rod (1704) and the fifth rod (1705) are connected by a pin (1706) that works with the socket (1707).

5. The water pressure testing system for steel pipe coils according to claim 4, characterized in that: The hinge joints of the first rod (1701) and the fifth rod (1705), as well as the hinge joints of the second rod (1702) and the third rod (1703), are all fixedly supported above the movable plate (17) by a support rod (1708).

6. The water pressure testing system for steel pipe coils according to claim 4, characterized in that: One end of the first rod (1701) is provided with a movable groove (1710), and one end of the second rod (1702) is movably hinged in the movable groove (1710).

7. The water pressure testing system for steel pipe coils according to claim 4, characterized in that: A pressure plate (1709) is fixedly connected at the hinge joint of the first rod (1701) and the second rod (1702). A convex rod (1711) is fixedly connected above the movable plate (17), and a spring (1712) is sleeved on one end of the convex rod (1711). As the pressure plate (1709) moves downward, it presses against the spring (1712). When the spring (1712) is fully compressed, the pressure plate (1709) is supported by the convex rod (1711).

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