Blowout preventer flashboard rubber core dismounting device

Abstract

The utility model relates to a blowout preventer flashboard rubber core dismounting device, and belongs to the technical field of oil field equipment maintenance. The blowout preventer flashboard rubber core dismounting device comprises a drawing hook, a drawing mechanism and a supporting frame, wherein the drawing mechanism is used for applying tensile force to the drawing hook, the supporting frame is used for being supported on the sealing end face of a flashboard body and providing tensile reaction force for the drawing mechanism when the drawing mechanism applies the tensile force to the drawing hook, and a rubber core avoiding space is formed in the supporting frame. The drawing hook comprises a hook arm connected with the drawing mechanism and a wedge-shaped hook tip which is arranged at one end of the hook arm and used for being wedged into a gap between the gate plate body and the rubber core and hooking the rubber core. The number of the drawing hooks is at least two, and the drawing hooks are used for hooking the rubber core from the two ends of the rubber core installation groove in the flashboard body respectively when the blowout preventer flashboard rubber core dismounting device is used. In the working process of the blowout preventer flashboard rubber core disassembling device, only the flashboard body needs to provide a supporting face, and the blowout preventer flashboard rubber core disassembling device is suitable for separation of various types of blowout preventer flashboard bodies and rubber cores.

Description

Technical Field

[0001] The utility model relates to a disassembly device for a blowout preventer gate rubber core, belonging to the technical field of oil field equipment maintenance. Background Art

[0002] Blowout preventers are important equipment for preventing blowout accidents during underground operations. According to the petroleum industry standard "SY / T6160-2014 Inspection and Maintenance of Blowout Preventers", blowout preventers should be inspected regularly, mainly divided into three-month, one-year and three-year inspections. The inspection of the gate rubber core is the most important inspection link. If the rubber core is damaged or used for more than half a year, it needs to be replaced. However, since the rubber core is embedded in the middle of the gate, the pins on both sides and the bottom of the rubber core are made of iron material, which will rust after long-term use and bond with the gate (iron) body. When using non-special tools such as screwdrivers and pry bars for disassembly, it is necessary to wedge the tool into the gap between the rubber core and the gate and continuously increase the tool wedging length by manually knocking the tool to increase the distance between the rubber core and the gate, and finally loosen the rubber core and remove it from the gate. However, in this process, the force direction of the rubber core is not parallel to the direction of the pins on the rubber core, and there is a certain angle. The force applied to the tool when striking the tool is difficult to control, which can easily cause the pins on one or both sides of the rubber core to bend significantly, making it difficult to remove the rubber core from the gate. Improper operation may even cause the pins to break, resulting in the entire gate being scrapped. In addition, the operation process is inefficient, labor-intensive, and there are safety hazards such as mechanical injuries due to improper force application.

[0003] In order to solve the above problems, in the prior art, a Chinese utility model patent with an authorization announcement date of CN211573445U and an authorization announcement number of September 5, 2020 discloses a blowout preventer gate rubber core removal tool, comprising a pair of push hydraulic cylinders arranged opposite to each other, a rubber core to be removed and embedded in the gate body is provided between the two push hydraulic cylinders, and a pull-out hydraulic cylinder facing the hook on the gate body is provided below the gate body; a wedge block is fixedly connected to the output end of the push hydraulic cylinder, and the wedge block can be slidably installed in a fixedly arranged fixed box, so that the push hydraulic cylinder drives the wedge block to slide in a direction approaching / away from the rubber core and can finally be inserted into the joint between the rubber core and the gate body when approaching the rubber core; a pull-out joint is fixedly connected to the output end of the pull-out hydraulic cylinder, and the pull-out joint can be connected to the hook. The rubber core removal tool uses wedges driven by two hydraulic cylinders to wedge into the joint between the rubber core and the gate body at the same time, and then pulls out the hydraulic cylinder to use the pulling force on the gate body to force the rubber core and the gate body to separate quickly. The removal efficiency is high, and no manual hammering is required, personal injury will not occur, and the gate is not easily scrapped due to pin breakage. However, the equipment needs to be equipped with multiple hydraulic cylinders, gears, racks and other mechanisms, the structure is relatively complex, the cost is high, and it is only suitable for gates with hook grooves on the bottom, not for gates without hooks on the bottom. In addition, different pull-out joints need to be replaced for gates with different hook groove sizes, and the applicability is poor. Utility Model Content

[0004] The utility model aims to provide a blowout preventer gate rubber core disassembly device to solve the problems of high cost and poor applicability of existing blowout preventer gate rubber core removal tools.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A blowout preventer gate rubber core disassembly device comprises a pulling hook, a pulling mechanism for applying pulling force to the pulling hook, and a support frame for supporting the sealing end surface of the gate body and providing a pulling reaction force to the pulling mechanism when the pulling mechanism applies pulling force to the pulling hook, wherein a rubber core avoidance space is arranged on the support frame; the pulling hook comprises a hook arm connected to the pulling mechanism and a wedge-shaped hook tip arranged at one end of the hook arm for wedging into the gap between the gate body and the rubber core and hooking the rubber core; at least two pulling hooks are arranged to respectively hook the rubber core from both ends of the rubber core installation groove on the gate body when the blowout preventer gate rubber core disassembly device is used.

[0007] Furthermore, the blowout preventer gate rubber core disassembly device also includes a hook tip push-in assembly, which includes a support ring that is sleeved on the outside of the pulling mechanism when in use and a threaded push rod that is threadedly connected to the support ring, and the inner end of the threaded push rod is a stop top end for cooperating with the pulling hook.

[0008] Furthermore, a centering positioning matching structure is provided between the abutting top end and the corresponding pulling hook.

[0009] Furthermore, the centering positioning matching structure includes an abutting top end of the threaded push rod and a blind hole provided on the hook arm of the pulling hook for the abutting top end to be inserted into.

[0010] Furthermore, the pulling mechanism includes an adjusting nut and a connecting piece; each pulling hook is equipped with the pulling mechanism; one end of the connecting piece is a connecting part for connecting to the hook arm of the pulling hook, and the other end is a columnar part with an external thread, the external thread of the columnar part cooperates with the adjusting nut, and the side of the adjusting nut close to the corresponding hook arm cooperates with the support frame stop.

[0011] Furthermore, the connecting piece is connected to the support frame via a long hole provided on the support frame. After passing through the long hole, the connecting piece is connected to the adjusting nut and can translate in the long hole. The width of the long hole is smaller than the minimum dimension of the outer edge contour of the adjusting nut, and the extension direction of the long hole is the same as the wedging direction of the wedge-shaped hook tip of the corresponding pulling hook.

[0012] Furthermore, the support frame includes a crossbeam and at least two groups of support legs arranged under the crossbeam, each group of support legs includes two vertical support legs, and the avoidance space is formed between the two vertical support legs of each group of support legs; the long hole is arranged on the crossbeam.

[0013] Furthermore, the connecting member is a bolt; the other end of the hook arm is a bent portion formed by bending 90° toward the wedge-shaped hook tip, and the bent portion is provided with a connecting hole for the bolt to pass through.

[0014] Furthermore, the portion of the hook arm located between the bent portion and the wedge-shaped hook tip is a connecting portion extending in a straight line, and the upper end surface of the wedge-shaped hook tip extends in a direction perpendicular to the connecting portion.

[0015] The utility model of the blowout preventer gate rubber core disassembly device is a brand-new device. When in use, the support frame is supported on the sealing end surface of the gate body, and then the wedge-shaped hook tips of the pull-out hooks located on both sides of the gate body rubber core installation groove are wedged between the gate body and the rubber core, and the pull-out hooks are firmly hooked to the rubber core, and then the rubber core is pulled out of the rubber core installation groove by the pulling mechanism, and the further provided hook tip insertion component can not only push the wedge-shaped hook tip between the gate body and the rubber core, but also prevent the wedge-shaped hook tip from coming out from between the gate body and the rubber core during the pulling process. Since only the gate body is required to provide a supporting surface during use, and there is no special requirement for the structure of the gate body, the utility model of the blowout preventer gate rubber core disassembly device is suitable for the separation of various types of blowout preventer gate bodies and rubber cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the blowout preventer gate rubber core disassembly device of Example 1 of the utility model when in use;

[0017] Figure 2 A top view of a support frame in a blowout preventer gate rubber core disassembly device according to Embodiment 1 of the utility model;

[0018] Figure 3 It is a left view of the bracket in the blowout preventer gate rubber core disassembly device of Example 1 of the utility model;

[0019] Among them, 1-support frame, 11-crossbeam, 12-support 2, 13-long hole, 2-pull bolt, 3-pull hook, 4-rubber core, 5-support ring, 6-jacking bolt, 7-gate body. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with specific implementation methods.

[0021] Example 1

[0022] The blowout preventer gate rubber core disassembly device of this embodiment is as follows Figures 1 to 3 As shown, it includes a support frame 1, two pulling hooks 3, a pulling mechanism independently matched with each pulling hook, and a hook tip insertion assembly, wherein:

[0023] The pulling mechanism includes a pulling bolt 2 and an adjusting nut matched with the pulling bolt 2; the pulling hook 3 includes a hook arm and a wedge-shaped hook tip arranged at one end of the hook arm, the other end of the hook arm is a bent portion formed by bending 90° toward the hook head, the bent portion is provided with a pulling bolt through hole, the portion of the hook arm between the bent portion and the hook head is a connecting portion extending in a straight line, and the upper end face of the wedge-shaped hook tip is perpendicular to the extending direction of the connecting portion; a blind hole is arranged on the side of the hook arm of the pulling hook 3 away from the hook head. In other embodiments of the utility model, the upper end face of the wedge-shaped hook head may not be parallel to the extending direction of the connecting portion.

[0024] The support frame 1 includes a crossbeam 11 and two groups of support legs symmetrically arranged below the crossbeam 11. Both ends of the crossbeam 11 are respectively provided with a long hole 13 extending along the length direction of the crossbeam 11 for the pull bolt 2 to pass through. The width of the long hole 13 is smaller than the minimum size of the outer edge contour of the adjusting nut. The rod of the pull bolt 2 passes through the pull bolt passing hole and the long hole 13 of the hook arm bending part in sequence and is connected to the adjusting nut. After passing through the long hole 13, the pull bolt 2 can slide in the length extension direction of the long hole 13. The wedging position of the wedge-shaped hook tip of the pull hook 3 can be adjusted by rotating the adjusting nut. In order to improve the stability of the support frame 1 when subjected to force, in other embodiments, another group of support legs is added in the middle of the two groups of support legs below the crossbeam 11, and a total of 3 groups of support legs are provided.

[0025] Each group of supporting legs includes two vertical supporting legs 12, and the plane where the two vertical supporting legs of each group of supporting legs are located is perpendicular to the length extension direction of the crossbeam 11. The distance between the two vertical supporting legs 12 of each supporting leg group is greater than the width of the rubber core installation groove on the blowout preventer gate body 7 and less than the width of the blowout preventer gate body 7, so that each group of supporting legs can be well supported on the sealing end surface of the gate body 7, and a rubber core avoidance space is formed between the two vertical supporting legs 12.

[0026] The hook tip ramming assembly comprises a support ring 5 and two ramming bolts 6 which are threadedly connected to the support ring 5 and correspond to the lifting hooks one by one. The support ring 5 is a rigid annular structure, which is sleeved outside the pulling mechanism when in use, and the annular surface of the support ring 5 is perpendicular to the annular extension direction of the support ring 5; the rod of the ramming bolt 6 forms a threaded ram, and the inner end of the ramming bolt 6 is abutting top for the pulling hook to ram. The rod diameter of the ramming bolt 6 is smaller than the diameter of the blind hole on the hook arm of the pulling hook 3, and the blind hole on the hook arm and the abutting top of the ramming bolt 6 constitute an abutting top and a counter-rotating joint. The centering and positioning matching structure between the pull hooks should be used. During the advancement of the push bolt, the hook arm should be first inserted into the blind hole and then pushed against the hook arm, so that the wedge-shaped hook tip is wedged into the gap between the gate body and the rubber core, which can prevent the push bolt 6 from shaking during the advancement process, and continuously press against the hook arm during the lifting process to prevent the wedge-shaped hook tip from coming out during the lifting process; in order to reduce the processing difficulty of the pull hook 3, the blind hole on the pull hook 3 can also be omitted, and the length of the threaded hole on the support ring that matches the push bolt 6 can be increased, which can also reduce the shaking of the push bolt 6. In other embodiments of the utility model, the hook tip push assembly of this embodiment can be omitted, and the rubber core can also be removed from the stranded wire installation groove of the gate body.

[0027] The width of the rubber core of the blowout preventer gate is about half of the width of the gate body. The sealing end surfaces on both sides of the rubber core installation groove on the gate body can provide support surfaces for the support frame. When the blowout preventer gate rubber core removal device of this embodiment is used, Figure 1As shown, the support ring 5 is framed outside the gate body 7 of the blowout preventer, and the support frame 1 is placed on the ejector gate body 7 so that the two vertical support legs 12 of each group of support legs are supported on both sides of the rubber core installation groove. Then, the adjusting nuts respectively threaded on the two pull-out bolts 2 are rotated to adjust the wedging position of the wedge-shaped hook tips on the corresponding pull-out hooks 3, so that the upper end surfaces of the wedge-shaped hook tips of the pull-out hooks 3 on both sides are aligned with the joint surface of the rubber core 4 and the gate body 7. After that, the external force is used to screw in the push-in bolt 6. After the rod of the push-in bolt 6 is inserted into the blind hole of the hook arm of the pull-in hook 3, it continues to move forward and presses the pull-in hook, so that the wedge-shaped hook tip is wedged between the rubber core 4 and the gate body 7 to separate the two. In this process, the pull-out bolt 2 follows the pull-out hook 3 in the corresponding Synchronous translation in the long hole 13 can avoid deformation of the pull hook 3 or the pull bolt 2; then, by alternately rotating the adjusting nuts threaded on the two pull bolts 2, a vertical upward force is applied to the rubber core 4 through the lifting hooks on both sides, so that the rubber core 4 is smoothly and completely separated from the gate body 7. Since the stroke of the push-in bolt 6 does not change during the process of lifting the rubber core, the lifting hook 3 is kept against the top, which can prevent the wedge-shaped hook tip from coming out from between the rubber core 4 and the gate body 7. The rubber core removal device of this embodiment has a simple operation process and does not require special maintenance before and after use. After simple adjustment, the gate rubber cores of different specifications can be removed. And because the adjusting nuts on both sides can be adjusted separately, it is particularly suitable for the removal of various blowout preventer gate rubber cores whose gaps between the rubber cores on both sides and the gate body are not in the same plane.

[0028] Example 2

[0029] The difference between the blowout preventer gate rubber core disassembly device of this embodiment and the blowout preventer gate rubber core disassembly device of embodiment 1 is that the pulling mechanism of embodiment 1 is replaced by a hydraulic telescopic cylinder connected to the crossbeam 11 of the support frame 1, and the piston rod end of the hydraulic telescopic rod is connected to the hook arm bending part of the pulling hook 3. The hydraulic telescopic cylinder is used to replace the pulling bolt 2 and the nut, so that the two sides of the rubber core 4 can be pulled at the same time, further reducing the bending and breaking probability of the pins on the rubber core 4, and improving the working efficiency.

[0030] Example 3

[0031] The difference between the blowout preventer ram rubber core disassembly device of this embodiment and the blowout preventer ram rubber core disassembly device of embodiment 1 is that the pull bolt passing hole of the bending part of the pull hook 3 in this embodiment is a long hole, and the hole for the pull bolt 2 to pass through on the crossbeam 11 is a common circular through hole. Setting the pull bolt passing hole of the bending part as a long hole can make the pull hook 3 more convenient to move in the horizontal direction.

[0032] Example 4

[0033] The difference between the blowout preventer gate rubber core disassembly device of this embodiment and the blowout preventer gate rubber core disassembly device of embodiment 1 is that: in this embodiment, the push-in bolt through hole on the support ring 5 in embodiment 1 is set as a light hole, and the blind hole on the hook arm in embodiment 1 is set as a threaded through hole. Through the combined action of the threaded through hole and the head of the push-in bolt 6, the wedge-shaped hook tip is wedged into the gap between the rubber core 4 and the gate body 7 and hooks the rubber core.

Claims

1. A blowout preventer gate rubber core disassembly device, characterized by: It comprises a pulling hook, a pulling mechanism for applying pulling force to the pulling hook, and a support frame for supporting the sealing end surface of the gate body and providing a pulling reaction force for the pulling mechanism when the pulling mechanism applies pulling force to the pulling hook, wherein a rubber core avoidance space is arranged on the support frame; the pulling hook comprises a hook arm connected to the pulling mechanism and a wedge-shaped hook tip arranged at one end of the hook arm for wedging into the gap between the gate body and the rubber core and hooking the rubber core; at least two pulling hooks are arranged to respectively hook the rubber core from both ends of the rubber core installation groove on the gate body when the blowout preventer gate rubber core removal device is used.

2. The device for disassembling the rubber core of the blowout preventer gate according to claim 1 is characterized in that: It also includes a hook tip push-in assembly, which includes a support ring that is sleeved outside the pulling mechanism when in use and a threaded push rod that is threadedly connected to the support ring, and the inner end of the threaded push rod is an abutting end for cooperating with the pulling hook.

3. The device for disassembling the rubber core of the blowout preventer gate according to claim 2 is characterized in that: A centering positioning matching structure is provided between the abutting top end and the corresponding pulling hook.

4. The device for disassembling the rubber core of the blowout preventer gate according to claim 3 is characterized in that: The centering positioning matching structure comprises an abutting top end of the threaded push rod and a blind hole arranged on the hook arm of the pulling hook for the abutting top end to be inserted into.

5. The device for removing the rubber core of the blowout preventer gate according to any one of claims 1 to 4, characterized in that: The pulling mechanism includes an adjusting nut and a connecting piece; each pulling hook is equipped with the pulling mechanism; one end of the connecting piece is a connecting part for connecting to the hook arm of the pulling hook, and the other end is a columnar part with an external thread, the external thread of the columnar part cooperates with the adjusting nut, and the side of the adjusting nut close to the corresponding hook arm cooperates with the support frame stop.

6. The device for removing the rubber core of the blowout preventer gate according to claim 5 is characterized in that: The connecting piece is connected to the support frame through a long hole set on the support frame. After passing through the long hole, the connecting piece is connected to the adjusting nut and can translate in the long hole; the width of the long hole is smaller than the minimum dimension of the outer edge contour of the adjusting nut, and the extension direction of the long hole is the same as the wedging direction of the wedge-shaped hook tip of the corresponding pulling hook.

7. The device for removing the rubber core of the blowout preventer gate according to claim 6 is characterized in that: The support frame includes a crossbeam and at least two groups of support legs arranged under the crossbeam, each group of support legs includes two vertical support legs, and the avoidance space is formed between the two vertical support legs of each group of support legs; the long hole is arranged on the crossbeam.

8. The device for removing the rubber core of the blowout preventer gate according to claim 5 is characterized in that: The connecting piece is a bolt; the other end of the hook arm is a bent portion formed by bending 90° toward the wedge-shaped hook tip, and the bent portion is provided with a connecting hole for the bolt to pass through.

9. The device for removing the rubber core of the blowout preventer gate according to claim 8 is characterized in that: The portion of the hook arm located between the bent portion and the wedge-shaped hook tip is a connecting portion extending in a straight line, and the upper end surface of the wedge-shaped hook tip extends in a direction perpendicular to the connecting portion.

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