Ram blowout preventer for wellhead of oil field

Abstract

The flashboard blowout preventer is applied to the field of flashboard blowout preventers and comprises a shell, the inner wall of the shell is in sliding connection with a flashboard, the surface of the flashboard is provided with a sealing mechanism, and the inner wall of the flashboard is in threaded connection with a screw rod; the rotary table is rotated to rotate the rotary shaft, the rotary shaft rotates to enable the second belt pulley to drive the first belt pulley to rotate, the first belt pulley rotates to enable the transmission shaft to drive the second bevel gear to rotate, and the second bevel gear rotates to enable the screw rod to drive the flashboard to move, so that the purpose of convenient use can be achieved, and the workload is reduced; by means of the mode that a sliding barrel is moved to enable a trapezoidal block to move, the trapezoidal block moves to enable a clamping block to be disengaged from a clamping groove under the action of a second spring, and a connecting pipe is taken down, the purpose of convenient assembly and disassembly can be achieved, the workload is reduced, the purpose of assembly and disassembly is improved, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gate valve blowout preventer, especially relates to a gate valve blowout preventer for oilfield wellhead. BACKGROUND

[0002] Through searching Chinese patent, the announcement number is: CN214221139U, a gate valve blowout preventer for oilfield wellhead, including rectangular shell, adjusting screw, wheel disc, blowout pipe, first butt joint disc, fastening screw, second butt joint disc, butt joint hole, limiting groove, gasket, observation window, sealing plate and bearing.The utility model has the advantages that: adjusting screw and rectangular shell are connected in thread rotation mode, sealing plate is connected in left and right sliding mode in the internal cavity of rectangular shell through adjusting screw, so that workers can control the left and right movement of sealing plate by rotating adjusting screw, and then control the sealing degree of the gate valve blowout preventer for oilfield wellhead, the wheel disc is disc-shaped as a whole, and a layer of anti-skid rubber is glued on the outer surface of the wheel disc to increase the friction between the palm of the worker and the wheel disc, prevent slipping, and increase the comfort when the worker holds, the blowout pipe is fixed with the screw hole by screwing through the first butt joint disc, which facilitates the installation and disassembly of the blowout pipe and the rectangular shell.

[0003] In summary, the gate valve blowout preventer is inconvenient to use, and the gate valve blowout preventer needs to rotate the adjusting screws on both sides when closing and opening, but since the two adjusting screws are distributed on both sides, it is not possible to rotate both adjusting screws simultaneously, which makes it more troublesome to open and close the gate valve blowout preventer, increases the workload, and reduces the work efficiency, and is not convenient to assemble and disassemble, the gate valve blowout preventer is connected and installed with the pipeline through the second butt joint disc, during installation, multiple bolts are needed for fixation, and tools are needed for assembly and disassembly, the assembly and disassembly process is relatively cumbersome, which increases the workload and reduces the work efficiency, and is not convenient to use, in order to solve the above problems, we propose a gate valve blowout preventer for oilfield wellhead. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a gate valve blowout preventer for oilfield wellhead, which is convenient to use and assemble and disassemble.

[0005] The utility model discloses a technical purpose above is realized through the following technical scheme: a kind of gate for oil field wellhead, it is including shell, the inner wall sliding connection of the shell has gate, the surface of the gate is provided with sealing mechanism, the inner wall of the gate is connected with screw rod by screwing, and screw rod is rotatably connected with the inner wall of shell, the surface of the shell is bolted with fixed shell, one end of the screw rod is fixedly sleeved with first bevel gear, the surface of the first bevel gear is engaged with second bevel gear, the axle of the second bevel gear is fixedly sleeved with transmission shaft, and transmission shaft is rotatably connected with the inner wall of fixed shell, the surface of the transmission shaft is fixedly sleeved with first belt disc, the inner wall between fixed shell and shell rotatably connects with shaft, the surface of the shaft is fixedly sleeved with second belt disc, and the surface of first belt disc and second belt disc is connected by belt drive.

[0006] The above technical scheme is adopted, the shaft is rotated by rotating the rotating disc, the first belt disc is driven to rotate by the second belt disc rotating, the transmission shaft is driven to rotate by the first belt disc rotating, and the screw rod is driven to move by the second bevel gear rotating, so that the gate is moved.

[0007] The utility model further sets up: the top and bottom of the shell are connected with connecting seat, the inner wall of the connecting seat is slidably sleeved with connecting pipe, the surface of the connecting seat is slidably sleehed with sliding cylinder, first spring is arranged between the sliding cylinder and the shell, the inner wall of the sliding cylinder is bolted with trapezoidal block, the surface of the trapezoidal block is slidably connected with clamping block, the surface of the clamping block is bolted with limiting plate, second spring is arranged between the limiting plate and the inner wall of the connecting seat, the surface of the connecting pipe is provided with clamping groove, and the clamping groove is clamped with the clamping block.

[0008] The above technical scheme is adopted, the trapezoidal block is moved by moving the sliding cylinder, the clamping block is disconnected with the clamping groove under the action of the second spring by the trapezoidal block moving, and the connecting pipe is taken off, so that the purpose of convenient installation and removal is achieved, the workload is reduced, the installation and removal purposes are improved, and use is facilitated.

[0009] The utility model further sets up: the sealing mechanism includes telescopic ring, third spring is arranged between the telescopic ring and the inner wall of the gate, and sealing pad is bonded on the surface of the telescopic ring.

[0010] The above technical scheme is adopted, the sealing mechanism is set up, the sealing property is improved, and oil leakage is prevented.

[0011] The utility model further sets up: one end of the shaft is fixedly sleeved with rotating disc.

[0012] The above technical scheme is adopted, the rotating disc is set up, and the shaft is conveniently rotated.

[0013] The present invention is further provided that the surface of the slide tube is provided with anti-slip texture.

[0014] By adopting the above technical solution, anti-slip texture is set to prevent hand slippage and facilitate operation.

[0015] The present invention is further provided with a sealing ring between the connecting seat and the connecting pipe.

[0016] By adopting the above technical solution, a sealing ring is installed to prevent oil leakage and improve sealing performance.

[0017] The present invention is further configured such that a fixing plate is bolted between the inner wall of the fixing shell and the surface of the outer shell, and the fixing plate is rotatably sleeved with the transmission shaft.

[0018] By adopting the above technical solution, the drive shaft is fixed by setting a fixing plate, thereby improving stability.

[0019] The present invention is further configured such that a fixing nut is threaded onto the surface of the rotating shaft.

[0020] By adopting the above technical solution, the rotating shaft is fixed by setting a fixing nut, thereby improving stability.

[0021] In summary, this utility model has the following beneficial effects:

[0022] 1. This utility model achieves the purpose of ease of use, reduces workload, and improves work efficiency by rotating a turntable to make a rotating shaft rotate, which in turn causes a second belt pulley to drive a first belt pulley to rotate, the first belt pulley to drive a transmission shaft to drive a second bevel gear to rotate, and the second bevel gear to drive a screw to move a gate.

[0023] 2. This utility model uses a movable sliding cylinder to move the trapezoidal block. The movement of the trapezoidal block causes the locking block to disengage from the locking groove under the action of the second spring, thus removing the connecting pipe. This method facilitates assembly and disassembly, reduces workload, improves the purpose of assembly and disassembly, and makes it convenient to use. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0026] Figure 3 This is a top sectional view of the present invention;

[0027] Figure 4 This is a utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0028] Label: 1, shell; 2, gate; 3, sealing mechanism; 4, screw; 5, fixed shell; 6, first bevel gear; 7, second bevel gear; 8, transmission shaft; 9, first belt disc; 10, rotating shaft; 11, second belt disc; 12, connecting seat; 13, connecting pipe; 14, sliding cylinder; 15, first spring; 16, trapezoidal block; 17, clamping block; 18, limiting plate; 19, second spring; 20, clamping groove; 21, telescopic ring; 22, third spring; 23, sealing gasket; 24, rotating disc; 25, anti-skid pattern; 26, sealing ring; 27, fixed plate; 28, fixed nut. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail below in combination with the drawings.

[0030] Example 1:

[0031] Reference Figure 1 , Figure 2 and Figure 3 , a kind of gate for oilfield wellhead, including shell 1, the inner wall of shell 1 is slidably connected with gate 2, the surface of gate 2 is provided with sealing mechanism 3, the inner wall of gate 2 is threadedly connected with screw 4, and screw 4 is rotatably connected with the inner wall of shell 1, the surface of shell 1 is bolted with fixed shell 5, one end of screw 4 is fixedly sleeved with first bevel gear 6, the surface of first bevel gear 6 is engaged with second bevel gear 7, transmission shaft 8 is fixedly sleeved at the axle center of second bevel gear 7, and transmission shaft 8 is rotatably connected with the inner wall of fixed shell 5, the surface of transmission shaft 8 is fixedly sleeved with first belt disc 9, rotating shaft 10 is rotatably sleeved between the inner wall of fixed shell 5 and shell 1, the surface of rotating shaft 10 is fixedly sleeved with second belt disc 11, and the surface of first belt disc 9 and second belt disc 11 is drivenly connected by belt, rotating disc 24 is rotated, rotating shaft 10 is rotated, first belt disc 9 is rotated, transmission shaft 8 is rotated, second bevel gear 7 is rotated, screw 4 is moved, and gate 2 is moved, which can achieve the purpose of being convenient to use, reduce the workload and improve work efficiency.

[0032] Reference Figure 2 , sealing mechanism 3 includes telescopic ring 21, third spring 22 is arranged between the inner wall of gate 2 and telescopic ring 21, sealing gasket 23 is bonded to the surface of telescopic ring 21, by setting sealing mechanism 3, the sealing property is improved, and oil leakage is prevented.

[0033] Reference Figure 1 and Figure 3 , one end of rotating shaft 10 is fixedly sleeved with rotating disc 24, rotating disc 24 is set, and rotating shaft 10 is rotated.

[0034] Reference Figure 3The inner wall of the fixed shell 5 and the surface of the outer shell 1 are connected with a fixed plate 27, and the fixed plate 27 is rotationally sleeved with the transmission shaft 8. By arranging the fixed plate 27, the transmission shaft 8 is fixed, and the stability is improved.

[0035] With reference to Figure 3 The surface of the rotating shaft 10 is threadedly connected with a fixed nut 28. By arranging the fixed nut 28, the rotating shaft 10 is fixed, and the stability is improved.

[0036] Embodiment 2:

[0037] With reference to Figure 1 、 Figure 2 and Figure 4 The top and bottom of the outer shell 1 are communicated with a connecting seat 12. The inner wall of the connecting seat 12 is slidingly sleeved with a connecting pipe 13. The surface of the connecting seat 12 is slidingly sleeved with a sliding cylinder 14. The sliding cylinder 14 is provided with a first spring 15 between the sliding cylinder 14 and the outer shell 1. The inner wall of the sliding cylinder 14 is connected with a trapezoidal block 16. The surface of the trapezoidal block 16 is slidingly connected with a clamping block 17. The surface of the clamping block 17 is connected with a limiting plate 18. The limiting plate 18 is provided with a second spring 19 between the limiting plate 18 and the inner wall of the connecting seat 12. The surface of the connecting pipe 13 is provided with a clamping groove 20, and the clamping groove 20 is clamped with the clamping block 17. By moving the sliding cylinder 14 to move the trapezoidal block 16, the trapezoidal block 16 moves to make the clamping block 17 disengage from the clamping groove 20 under the action of the second spring 19, and the connecting pipe 13 is removed. The above-mentioned mode can achieve the purpose of convenient assembly and disassembly, reduce the workload, improve the purpose of assembly and disassembly, and facilitate use.

[0038] With reference to Figure 4 The surface of the sliding cylinder 14 is provided with anti-skid lines 25. By arranging the anti-skid lines 25, hand slipping is prevented, and operation is facilitated.

[0039] With reference to Figure 4 A sealing ring 26 is arranged between the connecting seat 12 and the connecting pipe 13. By arranging the sealing ring 26, oil leakage is prevented, and the sealing performance is improved.

[0040] Brief description of use process: loosen the fixed nut 28, rotate the rotating disc 24, the rotating disc 24 rotates the rotating shaft 10, the rotating shaft 10 rotates the second pulley 11, the second pulley 11 rotates the first pulley 9, the first pulley 9 rotates the transmission shaft 8, the transmission shaft 8 rotates the second bevel gear 7, the second bevel gear 7 rotates the first bevel gear 6, the first bevel gear 6 rotates the screw rod 4, the screw rod 4 rotates the gate 2, so as to achieve the purpose of convenient use; move the sliding cylinder 14, the sliding cylinder 14 moves the trapezoidal block 16, the trapezoidal block 16 moves the clamping block 17 under the action of the second spring 19, insert the connecting pipe 13 into the connecting seat 12, loosen the sliding cylinder 14, the sliding cylinder 14 under the action of the first spring 15 drives the trapezoidal block 16 to reset, the trapezoidal block 16 resets the clamping block 17 and the clamping groove 20, the connecting pipe 13 is fixed, so as to achieve the purpose of convenient disassembly and assembly.

[0041] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A ram preventer for use in an oilfield wellhead, comprising a housing (1), characterised in that, The inner wall of the shell (1) is slidably connected with a shutter (2), the surface of the shutter (2) is provided with a sealing mechanism (3), the inner wall of the shutter (2) is threadedly connected with a screw rod (4), the screw rod (4) is rotatably sleeved with the inner wall of the shell (1), the surface of the shell (1) is bolted with a fixed shell (5), one end of the screw rod (4) is fixedly sleeved with a first bevel gear (6), the surface of the first bevel gear (6) is engaged with a second bevel gear (7), the shaft center of the second bevel gear (7) is fixedly sleeved with a transmission shaft (8), the transmission shaft (8) is rotatably connected with the inner wall of the fixed shell (5), the surface of the transmission shaft (8) is fixedly sleeved with a first belt disc (9), the inner wall between the fixed shell (5) and the shell (1) is rotatably sleeved with a rotating shaft (10), the surface of the rotating shaft (10) is fixedly sleeved with a second belt disc (11), and the surfaces of the first belt disc (9) and the second belt disc (11) are drivingly connected through a belt.

2. The ram preventer for use in an oilfield wellhead of claim 1, wherein, The top and bottom of the shell (1) are communicated with a connecting seat (12), the inner wall of the connecting seat (12) is slidably sleeved with a connecting pipe (13), the surface of the connecting seat (12) is slidably sleeved with a sliding cylinder (14), the first spring (15) is arranged between the sliding cylinder (14) and the shell (1), the inner wall of the sliding cylinder (14) is bolted with a trapezoidal block (16), the surface of the trapezoidal block (16) is slidably connected with a clamping block (17), the surface of the clamping block (17) is bolted with a limiting plate (18), the second spring (19) is arranged between the limiting plate (18) and the inner wall of the connecting seat (12), the surface of the connecting pipe (13) is provided with a clamping groove (20), and the clamping groove (20) is clamped with the clamping block (17).

3. The ram preventer for use in an oilfield wellhead of claim 1, wherein, The sealing mechanism (3) comprises a telescopic ring (21), the third spring (22) is arranged between the telescopic ring (21) and the inner wall of the shutter (2), and the surface of the telescopic ring (21) is bonded with a sealing gasket (23).

4. The ram preventer for use in an oilfield wellhead of claim 1, wherein, One end of the rotating shaft (10) is fixedly sleeved with a rotating disc (24).

5. The ram preventer for use in an oilfield wellhead of claim 2, wherein, The surface of the sliding cylinder (14) is provided with anti-skid lines (25).

6. The ram preventer for use in an oilfield wellhead of claim 2, wherein, The sealing ring (26) is arranged between the connecting seat (12) and the connecting pipe (13).

7. The ram preventer for use in an oilfield wellhead of claim 1, wherein, The inner wall of the fixed shell (5) and the surface of the shell (1) are bolted with a fixed plate (27), and the fixed plate (27) is rotatably sleeved with the transmission shaft (8).

8. The ram preventer for use in an oilfield wellhead of claim 1, wherein, The surface of the rotating shaft (10) is threadedly connected with a fixed nut (28).

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