Quick dismounting device for large gland of 250 valve

Abstract

The invention relates to the technical field of mechanical devices in the oil field industry, in particular to a quick dismounting device for a 250 valve large gland. The device comprises an operating platform, two quick fixers, a U-shaped bolt fixing plate, a hydraulic jack and an angle adjusting base are welded to the operating platform, a 250 valve is installed between the two quick fixers, the top end of the 250 valve is connected with a U-shaped bolt, the U-shaped bolt is connected with a U-shaped bolt fixing plate, a gland of the 250 valve is provided with a large gland torque wrench, and the angle adjusting base is connected with the hydraulic jack. The large gland torque wrench is connected with a U-shaped ejector rod, the upper end and the lower end of the U-shaped ejector rod are detachably connected with an ejector pin and a hydraulic jack respectively, and the lower portion of the hydraulic jack is connected with an angle adjusting base. The quick dismounting device for the large gland of the 250 valve is convenient and quick, does not need a special device for fixing, does not make contact with the lead screw, does not cause bending damage to the lead screw, saves the replacement cost, can ensure that the operation of dismounting the large gland can be quickly completed, and can also effectively complete the operation of fixing the 250 valve.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical devices in the oil field industry, and in particular to a 250 valve large gland quick disassembly device. Background Art

[0002] 250 valves are widely used because of their flexible switch and convenient operation in the process of opening and closing the oil and water well process in the oil field. In actual production, since the screw and the large gland of the 250 valve are sealed by a sealing ring, and it is difficult to lubricate this part, it is easy to cause the sealing ring to be abraded and aged under the corrosion of the injected water or produced fluid, and leakage occurs at the large gland. It needs to be repaired before it can be used again. In actual application, when repairing the 250 valve, the large gland must be removed first. However, since the 250 valve is exposed to the outside all year round, under the erosion of various extreme weather conditions, the large gland and the 250 valve thread joint will produce rust and other problems, making it very difficult to remove the valve. The traditional method of repairing the 250 valve is to use a tubing clamp plus a force bar to remove the large gland with the cooperation of multiple people. Due to the large force required for disassembly and the difficulty in controlling the clamping force of the pipe clamp on the large gland, the force bar often slips off and injures people and the large gland is deformed, resulting in the scrapping of the 250 valve. Finally, a new 250 valve can only be replaced, resulting in increased maintenance costs.

[0003] The prior art discloses a 250 gate large pressure cover disassembly tool, patent number: ZL201920933530.X. The working principle is to use a double-acting jack and a straight handle wrench to cooperate with an electric operation control method to disassemble the 250 valve large pressure cover. However, there are four defects in the operation process: First, the 250 valve needs to be fixed with a clamp. During installation, the large gate needs to be fastened to the column through the clamp, the connecting threaded rod, and the fixing nut. The fixing process of the 250 valve is complicated; second, in order to prevent the straight handle wrench from slipping and falling under force, an anti-slip fixture is required for fixing and limiting. The inner six holes of the straight handle wrench need to be inserted into the hexagon of the gate large pressure cover first, and then the anti-slip fixture is connected to the gate's lead screw thread through the central threaded tube, and the left end face of the top plate of the anti-slip fixture is pressed against the right side plane of the inner six holes of the straight handle wrench. The operation steps are complicated and multi-faceted. Third, when removing the large gland, due to the large gap between the straight handle wrench and the channel steel, the beam is subjected to single-sided force when lifting the straight handle wrench. When the straight handle wrench is subjected to large force on the beam and slides left and right, the top plate of the anti-slip fixture is locally stressed, so that the screw is bent by force, causing the 250 valve to be scrapped, increasing the maintenance cost. Fourth, due to the hexagonal edge of the large gland, the minimum angle of the wrench position adjustment is 60 degrees. After the 250 valve is fixed, the straight handle wrench is put on the large gland. If the wrench straight handle is below the lowest position of the beam, it is necessary to rotate 60 degrees counterclockwise and then put the straight handle wrench position on the hexagonal edge of the large gland, or turn the 250 valve to be repaired 180 degrees and clamp it again. It is necessary to adjust the position of the straight handle wrench many times to remove the large gland, which takes a long time to operate and has low efficiency. Therefore, in view of the above shortcomings, a 250 valve large gland quick disassembly device is proposed. Summary of the invention

[0004] 1. Technical issues to be resolved The present invention provides a 250 valve large gland quick disassembly device, which avoids the defects in the existing method such as slipping and injuring people, deformation of the large gland and resulting in the scrapping of the 250 valve due to the large force required for disassembly and the difficulty in controlling the clamping force of the pipe clamp on the large gland, thereby avoiding the defects of the existing method such as the large gland needs to be disassembled and the large gland needs to be clamped, thereby increasing the maintenance cost.

[0005] (II) Technical solution In order to solve the above problems, the present invention provides a 250 valve large gland quick disassembly device, comprising: An operating platform, the operating platform comprising a platform surface, platform legs and a platform base, a plurality of platform legs are welded below the platform surface, and the plurality of platform legs are welded to the platform base; Two quick fixers are welded on the surface of the platform, and the quick fixers can match 250 valves. The two quick fixers are respectively a first quick fixer and a second quick fixer. The 250 valve is installed in the middle of the first quick fixer and the second quick fixer. The first quick fixer is installed with a valve fixing limit hook. A U-bolt is connected to one side of the 250 valve, and the U-bolt is connected to a U-bolt fixing plate. The U-bolt fixing plate is horizontally welded to the platform leg. A large gland torque wrench is installed on the outer side of the 250 valve. The large gland torque wrench includes a circumference and a circular axis. The circumference of the large gland torque wrench is evenly distributed with multiple serrated grooves. The large gland torque wrench is connected to the 250 valve large gland through a circular axis hole and connected to a U-shaped push rod through a serrated groove. The upper end of the U-shaped push rod is detachably connected to a push pin, and the push pin is connected to the large gland torque wrench. The lower end of the U-shaped push rod is detachably connected to a hydraulic jack. The hydraulic jack is welded to the platform base, and the lower part of the hydraulic jack is connected to an angle adjustment base.

[0006] Preferably, a circular connecting plate is provided at the bottom of the quick fastener, and the quick fastener is welded to the platform surface via the connecting plate.

[0007] Preferably, the quick fastener is provided with two reinforcement plate brackets, namely a first reinforcement plate bracket and a second reinforcement plate bracket, the first reinforcement plate bracket is welded to the first reinforcement plate, and the second reinforcement plate bracket is welded to the second reinforcement plate.

[0008] Preferably, the first reinforcing plate bracket of the first quick fixer is welded with a shaft sleeve, the shaft sleeve is parallel to the operating platform, and the first quick fixer is used to install the valve fixing limit hook through the shaft sleeve.

[0009] Preferably, the second reinforcing plate of the first quick fastener is welded to a first semicircular bracket, and the first reinforcing plate of the second quick fastener is welded to a second semicircular bracket, and the first bracket and the second bracket are adapted to each other.

[0010] Preferably, the U-bolt fixing plate is provided with two grooves, the distance between the two grooves can match the width of the U-bolt, and the two open screws of the U-bolt are threads, and the threads are provided with nuts that match the bolts.

[0011] Preferably, the angle adjustment base includes an axle seat, and the hydraulic jack is connected to the axle of the angle adjustment base via a steel pin.

[0012] Preferably, the lower end of the U-shaped push rod is connected to the hydraulic piston on the upper part of the hydraulic jack through a thread, and the upper end of the U-shaped push rod is provided with a pair of through holes, and the push pins pass through the through holes.

[0013] Preferably, the inner width of the U-shaped push rod is greater than the thickness of the large gland torque wrench.

[0014] Preferably, a hexagonal through hole is provided at the center of the large gland torque wrench, and the hexagonal through hole can match the hexagonal of the large gland, and the thickness of the large gland torque wrench is adapted to the length of the hexagon on the large gland.

[0015] (III) Beneficial effects The 250 valve large gland quick disassembly device provided by the present invention is convenient and quick. The 250 valve is horizontally placed between the first quick fixer and the second quick fixer on the operating platform, and the large gland torque wrench is used to cover the 250 valve. No special device is required for fixing, and there is no contact with the lead screw, so the lead screw will not be bent or damaged, saving the replacement cost of the 250 valve. With the help of multiple serrated grooves evenly distributed on the circumference of the large gland torque wrench, the angle of the U-shaped push rod is adjusted to ensure that the large gland disassembly operation is quickly completed, and then in conjunction with the U-shaped bolt, the fixing operation of the 250 valve is effectively completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a quick disassembly device for a large valve gland in accordance with Embodiment 250 of the present invention; Figure 2 It is a left side view of a quick disassembly device for a large gland of a valve according to embodiment 250 of the present invention; Figure 3 It is a structural schematic diagram of the operating platform of an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a U-shaped bolt according to an embodiment of the present invention; Figure 5 This is a schematic structural diagram of a large gland torque wrench according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a hydraulic jack and a U-shaped push rod according to an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a first quick fastener according to an embodiment of the present invention; Figure 8 is a schematic structural diagram of a second quick fastener according to an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of a U-bolt fixing plate according to an embodiment of the present invention.

[0017] Among them: 1-operating platform; 2-large gland torque wrench; 3-U-bolt; 4-U-bolt fixing plate; 5-thrust pin; 6-U-type push rod; 7-hydraulic jack; 8-angle adjustment base; 9-250 valve; 10-quick fixer; 11-valve fixing limit hook. Implementation

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “upper”, “lower”, “inside”, “outside”, “top”, “bottom”, etc. are all based on the orientations or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figures 1 to 9 As shown, the present invention provides a 250 valve large gland quick disassembly device, comprising: An operating platform 1, the operating platform 1 comprising a platform surface, platform legs and a platform base, a plurality of platform legs are welded below the platform surface, and the plurality of platform legs are welded to the platform base; Two quick fixers 10 are welded on the platform surface of the operating platform 1. The two quick fixers 10 are respectively the first quick fixer and the second quick fixer. A 250 valve 9 is installed between the first quick fixer and the second quick fixer. The first quick fixer is installed with a valve fixing limit hook 11. One side of the 250 valve 9 is connected with a U-bolt 3. The U-bolt 3 is connected with a U-bolt fixing plate 4. The U-bolt fixing plate 4 is horizontally welded to the platform leg. The outer side of the 250 valve 9 is connected with a U-bolt 3. A large gland torque wrench 2 is mounted on the side, and the large gland torque wrench 2 includes a circumference and a circular axis. A plurality of serrated grooves are evenly distributed on the circumference of the large gland torque wrench 2. The large gland torque wrench 2 is connected to a U-shaped push rod 6 through the circular axis. The upper end of the U-shaped push rod 6 is detachably connected to a push pin 5. The push pin 5 is connected to the large gland torque wrench 2. The lower end of the U-shaped push rod 6 is detachably connected to a hydraulic jack 7. The hydraulic jack 7 is welded to a platform base, and the bottom of the hydraulic jack 7 is connected to an angle adjustment base 8.

[0021] In practical applications, Figure 7 is a schematic structural diagram of a first quick fixer according to an embodiment of the present invention, Figure 8 FIG. 1 is a schematic diagram of the structure of a second quick fixer according to an embodiment of the present invention. Figure 7 and Figure 8As shown, a circular connecting plate is provided at the bottom of the quick fixer 10, and the quick fixer 10 is welded to the platform surface of the operating platform 1 through the connecting plate. The quick fixer 10 is provided with two reinforcing plate brackets, namely a first reinforcing plate bracket and a second reinforcing plate bracket. The first reinforcing plate bracket is welded to the first reinforcing plate, and the second reinforcing plate bracket is welded to the second reinforcing plate. In this device, the first reinforcing plate bracket of the first quick fixer is welded to a shaft sleeve, and the shaft sleeve is parallel to the operating platform 1. The first quick fixer fixes the valve fixing limit hook 11 through the shaft sleeve.

[0022] It should be noted that the quick fixer 10 can match the 250 valve. The quick fixer 10 fixes the 250 valve 9 with the aid of a bracket. In this device, the bracket is a semicircular bracket, and the curvature of the semicircular bracket can match the clamp heads on both sides of the 250 valve 9. In actual applications, due to the different installation positions of the two quick fixers 10, the installation positions of the two brackets are also different. However, the structures of the two brackets are exactly the same.

[0023] In the device, the second reinforcing plate of the first quick fixer is welded to the first semicircular bracket, and the first reinforcing plate of the second quick fixer is welded to the second semicircular bracket, and the first bracket and the second bracket are adapted to each other.

[0024] In practical applications, Figure 4 Schematic diagram of the structure of the U-bolt according to the embodiment of the present invention. Figure 4 As shown, the U-bolt fixing plate 4 is provided with two grooves, the distance between the two grooves can match the width of the U-bolt 3, and the two open screws of the U-bolt 3 are threads, and the threads are provided with nuts that match the bolts.

[0025] Fig. 9 Schematic diagram of the structure of the U-bolt fixing plate according to an embodiment of the present invention. Fig. 9 As shown, in the present device, the U-bolt fixing plate 4 is used to fix the U-bolt 3, and the U-bolt 3 is connected to the 250 valve 9. In practical applications, in order to ensure that the U-bolt 3 can be connected to the 250 valve 9, the position of the U-bolt fixing plate 4 matches the spacing between the two quick fixers 10, and the welding position of the U-bolt fixing plate 4 is on the platform leg of the operating platform 1.

[0026] Figure 5 Schematic diagram of the structure of a large gland torque wrench according to an embodiment of the present invention. Figure 5As shown, the large gland torque wrench 2 includes a circumference and a circular axis. A plurality of serrated grooves are evenly distributed on the circumference of the large gland torque wrench 2. The large gland torque wrench 2 can adjust different angles through the serrated groove large gland. The large gland torque wrench 2 is connected to the 250 valve large gland through the circular axis hole, and is connected to the U-shaped push rod 6 through the serrated groove. A hexagonal through hole is provided in the center of the large gland torque wrench 2. The hexagonal through hole can match the hexagon of the large gland. The thickness of the large gland torque wrench 2 is adapted to the length of the hexagon on the large gland.

[0027] Figure 6 FIG. 1 is a schematic diagram of the structure of a hydraulic jack and a U-shaped push rod according to an embodiment of the present invention. Figure 6 As shown, the angle adjustment base 8 includes a shaft, and the hydraulic jack 7 is connected to the shaft of the angle adjustment base 8 through a cotter pin. In actual application, the lower end of the U-shaped push rod 6 is threadedly connected to the hydraulic piston on the upper part of the hydraulic jack 7. A pair of through holes are provided at the upper end of the U-shaped push rod 6, and the push pins 5 pass through the through holes. The internal width of the U-shaped push rod 6 is greater than the thickness of the large gland torque wrench 2.

[0028] It should be noted that a concave platform is provided below the hydraulic jack 7 , and the hydraulic jack 7 is welded to the platform base of the operating platform 1 through the platform. At the same time, an angle adjustment base 8 is welded on the platform.

[0029] In practical applications, the operating platform 1 is the core frame of the entire device, and the operating platform 1 is responsible for installing other components to realize the rapid disassembly of the large gland of the 250 valve 9; the large gland torque wrench 2 can solve the disassembly of the large gland at different angles by using its circular serrated design, and realize 360° installation and use; the U-bolt 3 can improve the stability of the 250 valve 9 during the disassembly process. In this device, after adjusting the U-bolt 3, it only needs to be hung on the 250 valve 9 and the U-bolt fixing plate 4 without tightening; the main purpose of the U-bolt fixing plate 4 is to be used for the hanging of the U-bolt 3, which plays an auxiliary stabilizing role during the disassembly of the 250 valve 9; the top pin 5 is lifted by the hydraulic jack 7 and the U-shaped push rod 6 to rotate the large gland torque wrench 2 to realize the disassembly of the large gland; the lower end of the U-shaped push rod 6 is connected to the hydraulic jack 7, and the upper end of the U-shaped push rod 6 is connected to the top pin 5, and the large gland torque wrench 2 is rotated by mutual cooperation to realize the disassembly of the large gland.

[0030] In addition, the hydraulic jack 7 serves as the power source of the entire device, allowing the large gland torque wrench 2 to rotate to achieve the removal of the large gland; the angle adjustment base 8 adjusts the left and right angle changes of the hydraulic jack 7 during the upward process to eliminate the dislocation and damage of the jack base caused by the large gland torque wrench 2 during the rotation process; the 250 valve 9 is a special maintenance material for the device; the structure of the quick fixer 10 is aimed at the T-shaped shape of the 250 valve 9. In this device, two quick fixers 10 are provided, namely the first quick fixer and the second quick fixer. The first quick fixer and the second quick fixer are used together to achieve quick fixation of the 250 valve 9 without tightening; the valve fixing limit hook 11 is installed on the reinforcing plate of the first quick fixer, which plays an auxiliary role to prevent the valve from slipping during the process of being placed into the quick fixer 10.

[0031] The following is a detailed description of the working principle of the application process of this 250 valve large gland quick disassembly device: Step 1: First, select the repairable 250 valve 9 and remove the grease fitting of the 250 valve 9 to be repaired.

[0032] Step 2: Install and fix the 250 valve 9. There is no need to tighten it. You only need to place the 250 valve 9 horizontally into the quick fixer 10 on the operating platform, and let the clamp heads at both ends of the valve be respectively inserted into the semicircular arcs of the two quick fixers 10. Then, move the valve fixing limit hook 11 to buckle it on the clamp of the 250 valve 9, which can effectively prevent the valve from slipping. Therefore, the fixation of the 250 valve 9 does not require the removal of bolts and nuts, which is convenient and quick.

[0033] It should be noted that, in this embodiment, Figure 3 FIG. 1 is a schematic diagram of the structure of the operating platform of an embodiment of the present invention. Figure 3 As shown, the operating platform 1 is provided with four platform legs, two quick fixers 10 are installed on the left side of the platform surface, and the U-bolt fixing plate 4 is horizontally welded to two adjacent platform legs on the left side.

[0034] Step 3. In this embodiment, 16 serrated grooves are provided on the circumference of the large gland torque wrench 2, which can achieve 22.5° adjustment each time, so that the U-shaped push rod 6 can push the large gland torque wrench 2 to rotate at the optimal angle to disassemble the large gland. In actual application, the large gland torque wrench 2 is sleeved on the hexagon of the gland of the 250 valve 9, and no special device is required for fixing. The nut position of the U-shaped bolt 3 is adjusted, and the upper end of the U-shaped bolt 3 is hung on the front end of the gland of the 250 valve 9. The nut position of the lower end of the U-shaped bolt 3 is placed in the groove of the U-shaped bolt fixing plate 4. Through the two nut limiters, the fixing operation of the 250 valve 9 can be quickly completed without tightening.

[0035] Step 4. Press the hydraulic jack 7 to the bottom and move the U-shaped push rod 6 on the hydraulic jack 7 to the edge of the large gland torque wrench 2. The pin holes on both sides of the top of the U-shaped push rod 6 can be arbitrarily aligned with the 16 serrated grooves evenly distributed on the large gland torque wrench 2. Then, insert the push pin 5 into the pin holes on both sides of the top of the U-shaped push rod 6. The angle adjustment base 8 can achieve angle adjustment with the rotation direction of the large gland torque wrench 2 and the direction of the movement force of the U-shaped push rod 6, and easily realize the integrated connection of the 250 valve 9, the large gland torque wrench 2, the push pin 5, the U-shaped push rod 6 and the hydraulic jack 7, and convert the upward thrust into the rotational power required for disassembly of the large gland.

[0036] Step 5, close the one-way valve on the hydraulic jack 7, lift the hydraulic jack 7, and as the hydraulic jack 7 is lifted, the large gland torque wrench 2 is driven to rotate counterclockwise through the U-shaped push rod 6 and the push pin 5, and the operation of loosening the large gland is quickly completed.

[0037] Step 6: The large gland torque wrench 2 is directly mounted on the gland of the 250 valve 9, which effectively avoids the bending damage of the screw caused by contact between other parts of the device and the screw, and saves the replacement cost of the 250 valve 9.

[0038] Step 7. In the whole operation process of the device, except that the U-bolt 3 needs to be limited by the nut, it should be noted that in actual application, only the nut position needs to be adjusted manually, and no tightening is required. There is no other thread tightening operation. Therefore, a lot of operation time and workload are saved, and efficient and convenient maintenance of the 250 valve 9 is achieved.

[0039] The 250 valve large gland quick disassembly device provided by the present invention is convenient and quick. The 250 valve is horizontally placed between the first quick fixer and the second quick fixer on the operating platform, and the large gland torque wrench is used to cover the 250 valve. No special device is required for fixing, and there is no contact with the lead screw, so the lead screw will not be bent or damaged, saving the replacement cost of the 250 valve. With the help of multiple serrated grooves evenly distributed on the circumference of the large gland torque wrench, the angle of the U-shaped push rod is adjusted to ensure that the large gland disassembly operation is quickly completed, and then in conjunction with the U-shaped bolt, the fixing operation of the 250 valve is effectively completed.

[0040] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A 250 valve large gland quick disassembly device, It is characterized in that include: An operating platform (1), the operating platform (1) comprising a platform surface, platform legs and a platform base, a plurality of platform legs being welded below the platform surface, and the plurality of platform legs being welded to the platform base; Two quick fixers (10) are welded on the surface of the platform. The quick fixers (10) can match the 250 valve. The two quick fixers (10) are respectively a first quick fixer and a second quick fixer. The 250 valve (9) is installed between the first quick fixer and the second quick fixer. The first quick fixer is installed with a valve fixing limit hook (11). The top of the 250 valve (9) is connected to a U-bolt (3). The U-bolt (3) is connected to a U-bolt fixing plate (4). The U-bolt fixing plate (4) is horizontally welded to the platform support leg. The 250 valve (9) A large gland torque wrench (2) is installed on the outer side of the gland, the large gland torque wrench (2) comprises a circumference and a circular shaft hole, a plurality of serrated grooves are evenly distributed on the circumference of the large gland torque wrench (2), the large gland torque wrench (2) is connected to the 250 valve large gland via the circular shaft hole, and is connected to a U-shaped push rod (6) via the serrated groove, the upper end of the U-shaped push rod (6) is detachably connected to a push pin (5), the push pin (5) is connected to the large gland torque wrench (2), the lower end of the U-shaped push rod (6) is connected to a hydraulic jack (7), and the lower end of the hydraulic jack (7) is connected to an angle adjustment base (8).

2. The 250 valve large gland quick disassembly device according to claim 1, It is characterized in that A circular connecting plate is provided at the bottom of the quick fixer (10), and the quick fixer (10) is welded to the platform surface via the connecting plate.

3. The 250 valve large gland quick disassembly device according to claim 1, It is characterized in that The quick fixer (10) is provided with two reinforcement plate brackets, namely a first reinforcement plate bracket and a second reinforcement plate bracket, wherein the first reinforcement plate bracket is welded to the first reinforcement plate, and the second reinforcement plate bracket is welded to the second reinforcement plate.

4. The 250 valve large gland quick disassembly device according to claim 3, It is characterized in that The first reinforcing plate bracket of the first quick fixer is welded to a shaft sleeve, the shaft sleeve is parallel to the operating platform (1), and the first quick fixer is provided with a valve fixing limit hook (11) via the shaft sleeve.

5. The 250 valve large gland quick disassembly device according to claim 3, It is characterized in that The second reinforcing plate of the first quick fastener is welded to a first semicircular bracket, and the first reinforcing plate of the second quick fastener is welded to a second semicircular bracket, and the first bracket and the second bracket are adapted to each other.

6. The 250 valve large gland quick disassembly device according to claim 1, It is characterized in that The U-shaped bolt fixing plate (4) is provided with two grooves, the distance between the two grooves being able to match the width of the U-shaped bolt (3), and the two open screws of the U-shaped bolt (3) are threads, and the threads are provided with nuts matching the bolts.

7. The 250 valve large gland quick disassembly device according to claim 1, It is characterized in that The angle adjustment base (8) comprises an axle seat, and the hydraulic jack (7) is connected to the axle seat of the angle adjustment base (8) via a steel pin.

8. The 250 valve large gland quick disassembly device according to claim 1, It is characterized in that The lower end of the U-shaped push rod (6) is connected to the hydraulic piston on the upper part of the hydraulic jack (7) through a thread, and the upper end of the U-shaped push rod (6) is provided with a pair of through holes, through which the push pins (5) pass.

9. The 250 valve large gland quick disassembly device according to claim 8, It is characterized in that The inner width of the U-shaped push rod (6) is greater than the thickness of the large gland torque wrench (2).

10. The 250 valve large gland quick disassembly device according to claim 9, It is characterized in that A hexagonal through hole is provided at the center of the large gland torque wrench (2), and the hexagonal through hole can match the hexagon of the large gland. The thickness of the large gland torque wrench (2) is adapted to the length of the hexagon on the large gland.

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