Portable power tongs for pipeline operation

Abstract

The utility model relates to a pair of portable power tongs for pipeline operation, which comprises a shell assembly, a tong head clamping mechanism, a righting assembly, a brake reset mechanism and a power transmission assembly, and the power transmission assembly consists of a power assembly, a first-stage speed reducer, a second-stage conical reduction gear and a third-stage transition reduction gear; the first-stage speed reducer, the second-stage conical reduction gear and the third-stage transition reduction gear are sequentially arranged on a transmission line between the power assembly and the tong head large gear, and the second-stage conical reduction gear and the third-stage transition reduction gear pass through a pair of meshed spiral bevel gears. The power output direction of the power assembly is rotated by 90 degrees and then transmitted to the tong head large gear. The utility model provides a pair of portable power tongs for pipeline operation, which is light and convenient to carry, simple to operate, high in operation efficiency and considerable in economic benefit and social benefit, torque can be effectively controlled, the operation quality is greatly improved, the labor intensity of operators is reduced, and the mechanical operation of the pipeline operation is realized.

Description

Technical Field

[0001] This utility model relates to a power clamp for opening oilfield pipelines, and in particular to a portable power clamp suitable for horizontal pipeline operations, belonging to the field of petroleum equipment manufacturing technology. Background Technology

[0002] Typically, auxiliary pipelines for oil wells in oil fields are made of small-diameter tubing connected by threads. There is no mechanical equipment for loading and unloading threads on site, and the work still relies on manual operation with hand-held pipe wrenches. This results in high labor intensity, long working time, low work efficiency, and the torque on the tubing string cannot be effectively controlled.

[0003] The reasons are as follows: First, the pipeline operation site environment is harsh, making it inconvenient to transport large equipment, and conventional power tongs are heavy and inconvenient to operate on site; second, most pipelines are horizontal, while conventional open-end power tongs are used for vertical oil well pipelines, and their power tongs are horizontal. If used for horizontal pipelines, the power tongs need to be erected, but the existing power tongs' large gear straightening mechanism cannot meet the straightening support of the large gear when erected.

[0004] Therefore, there is an urgent need for a power clamp that can perform mechanical operations on transverse pipelines, is lightweight, easy to operate, highly efficient, and has stable torque. Summary of the Invention

[0005] This utility model provides a portable power clamp for pipeline operations. It stands the clamp upright and uses lightweight materials and a straightening mechanism and a braking and resetting mechanism to support its upright operation, thereby achieving mechanized operation of lifting and untying on horizontal pipelines, and making it convenient to carry and operate.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a portable power pliers for pipeline operations, comprising a housing assembly, a plier head clamping mechanism, a straightening assembly, a braking and resetting mechanism, and a power transmission assembly. The housing assembly includes an upper cover, a lower shell, and a handle. The plier head clamping mechanism is located at the front of the housing assembly and includes a plier head gear, a jaw plate frame, a ramp, a jaw plate assembly, and a resetting spring. The ramp is located on the inner wall of the plier head gear, the jaw plate frame is located in the inner cavity of the plier head gear, and the jaw plate assembly is located in the square holes on both sides of the jaw plate frame. The characteristic feature is that:

[0007] The return spring is located on both sides of the square hole of the jaw plate frame. One end of the return spring hooks onto the jaw plate assembly, and the other end abuts against the jaw plate frame.

[0008] The straightening assembly includes a lower straightening frame, a middle straightening frame, an upper straightening frame, a straightening shaft, and straightening wheels. The lower straightening frame is fixed inside the lower shell, the middle straightening frame is fixed inside the upper cover, and the upper straightening frame is fixed outside the upper cover. The straightening wheels are distributed on the lower, middle, and upper straightening frames via the straightening shaft. The straightening wheels on the lower and middle straightening frames are located in the annular straightening grooves at both ends of the large gear of the pliers head to support and straighten the pliers head clamping mechanism.

[0009] The brake reset mechanism includes a brake disc, a brake band, a fixed seat, an adjusting bolt, and a reversing pin. The brake disc is connected to the jaw plate frame of the caliper clamping mechanism, and the fixed seat is fixed to the outside of the upper shell. The straightening wheel on the upper straightening frame is located in the annular straightening groove on the inner side of the brake disc to support and straighten the brake reset mechanism. The brake band wraps around the outer circle of the brake disc, and its two ends are connected to the fixed seat through adjusting bolts. The reversing pin passes through the reversing pin hole on the brake disc and extends into the reversing groove hole provided on the large gear of the caliper.

[0010] The power transmission assembly consists of a powertrain, a first-stage reducer, a second-stage bevel gear, and a third-stage transition gear.

[0011] The power transmission assembly is located at the rear of the housing assembly, and the output shaft axis of the power assembly intersects and is perpendicular to the axis of the clamped column.

[0012] The first-stage reducer, the second-stage bevel gear, and the third-stage transition gear are sequentially arranged on the transmission route between the powertrain and the large caliper gear. The second-stage bevel gear and the third-stage transition gear transmit the power output of the powertrain to the large caliper gear by rotating the direction of the power output by 90° through a pair of meshing spiral bevel gears.

[0013] In this utility model, the powertrain solution is to use a DC motor, which is powered by a battery, and the controller realizes the forward and reverse rotation and parameter adjustment of the DC motor.

[0014] In this utility model, the second power assembly scheme adopts a hydraulic motor, which is powered by a hydraulic power source, and the forward rotation, reverse rotation and pressure regulation of the hydraulic motor are realized by a hydraulic reversing valve.

[0015] Preferably, the housing assembly is made of aluminum alloy to reduce weight and facilitate transportation and operation.

[0016] Preferably, in this utility model, another embodiment of the brake reset mechanism adopts a brake spring structure, which includes a brake disc, a brake bolt, a brake spring, a brake steel plate, a friction plate, a reversing pin, and a stop pin. The brake disc is fixed to the outside of the upper cover by the brake bolt and the brake spring. The brake steel plate is connected to the jaw plate frame of the caliper clamping mechanism. There are two friction plates, one fixed to the inside of the brake disc and the other fixed to the outside of the upper cover. The brake steel plate is clamped between the two friction plates. The stop pin is fixed to the large gear of the caliper head, and the reversing pin is set in the slot of the brake steel plate.

[0017] In this technical solution, by holding the power clamp handle and aligning it vertically with the section of the tubing to be worked on, the DC motor or hydraulic motor can be rotated forward or backward to perform clamping or unclamping operations on the tubing. During use, depending on different working conditions, the power clamp can be directly erected and aligned with the tubing, utilizing the side of the tubing pit to bear the counter-torque during clamping or unclamping; alternatively, the power clamp can be placed vertically in an auxiliary support frame, with the support frame bearing the counter-torque during clamping or unclamping; or the power clamp can be laid horizontally and entered into the tubing from the side, utilizing the ground to bear the counter-torque during clamping or unclamping.

[0018] This utility model provides a portable power wrench for pipeline operations. It is lightweight, easy to carry, simple to operate, and highly efficient. The torque for tightening and loosening can be effectively controlled, which greatly improves the quality of the work, reduces the labor intensity of the workers, and realizes the mechanization of pipeline operations. Its economic and social benefits are considerable. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Appendix Figure 2 for Figure 1 Sectional view A-A;

[0021] Appendix Figure 3 A schematic diagram (partial sectional view) of the brake spring structure, which is an alternative scheme for the brake reset mechanism.

[0022] In the diagram: 1. Housing assembly, 101. Top cover, 102. Lower shell, 103. Handle, 2. 201. Clamping mechanism; 202. Large gear of clamping head; 203. Jaw plate frame; 204. Slope plate; 205. Jaw plate assembly; 206. Return spring; 3. Straightening assembly; 301. Lower straightening frame; 302. Middle straightening frame; 303. Upper straightening frame; 304. Straightening shaft; 305. Straightening wheel; 4. Brake reset mechanism; 401. Brake disc; 402. Brake band; 403. Fixing seat; 404. Adjusting bolt; 405. Reversing pin; 406. Brake disc; 407. Brake bolt; 408. Brake spring; 409. Brake pad; 410. Friction pad; 411. Reversing pin; 412. Stop pin; 5. Power transmission assembly; 501. Power assembly; 502. First stage reducer; 503. Second stage bevel reduction gear; 504. Third stage transition reduction gear. Detailed Implementation

[0023] The present invention will be further explained below with reference to the accompanying drawings:

[0024] As attached Figure 1 , 2 As shown, a portable power wrench for pipework includes a housing assembly 1, a wrench head clamping mechanism 2, a straightening assembly 3, a braking and reset mechanism 4, and a power transmission assembly 5. The housing assembly 1 includes an upper cover 101, a lower shell 102, and a handle 103. The wrench head clamping mechanism 2 is located at the front of the housing assembly 1 and includes a large wrench head gear 201, a jaw plate frame 202, a ramp 203, a jaw plate assembly 204, and a reset spring 205. The ramp 203 is located on the inner wall of the large wrench head gear 201, the jaw plate frame 202 is located in the inner cavity of the large wrench head gear 201, the jaw plate assembly 204 is located in the square holes on both sides of the jaw plate frame 202, and the reset spring 205 is located on both sides of the square holes of the jaw plate frame 202. One end of the reset spring 205 hooks onto the jaw plate assembly 204, and the other end rests against the jaw plate frame 202.

[0025] The straightening assembly 3 includes a lower straightening frame 301, a middle straightening frame 302, an upper straightening frame 303, a straightening shaft 304, and straightening wheels 305. The lower straightening frame 301 is fixed inside the lower shell 102, the middle straightening frame 302 is fixed inside the upper cover 101, and the upper straightening frame 303 is fixed outside the upper cover 101. The straightening wheels 305 are distributed on the lower straightening frame 301, the middle straightening frame 302, and the upper straightening frame 303 through the straightening shaft 304. The straightening wheels 305 on the lower straightening frame 301 and the middle straightening frame 302 are provided in the annular straightening grooves at both ends of the large gear 201 of the clamp head to support and straighten the clamping mechanism 2 of the clamp head.

[0026] The brake reset mechanism 4 includes a brake disc 401, a brake band 402, a fixed seat 403, an adjusting bolt 404, and a reversing pin 405. The brake disc 401 is connected to the jaw plate frame 202 of the caliper clamping mechanism 2, and the fixed seat 403 is fixed to the outside of the upper shell. The straightening wheel 305 on the upper straightening frame 303 is located in the annular straightening groove on the inner side of the brake disc 401 to support and straighten the brake reset mechanism 4. The brake band 402 wraps around the outer circle of the brake disc 401, and its two ends are connected to the fixed seat 403 through the adjusting bolt 404. The reversing pin 405 passes through the reversing pin 405 hole on the brake disc 401 and extends into the reversing groove hole provided on the large gear 201 of the caliper.

[0027] The power transmission assembly 5 consists of a power assembly 501, a first-stage reducer 502, a second-stage bevel reduction gear 503, and a third-stage transition reduction gear 504;

[0028] The power transmission assembly 5 is located at the rear of the housing assembly 1, and the output shaft axis of the power transmission assembly 501 intersects and is perpendicular to the axis of the clamped column;

[0029] The first-stage reducer 502, the second-stage bevel gear 503, and the third-stage transition gear 504 are sequentially arranged on the transmission route between the powertrain 501 and the caliper head gear 201. The second-stage bevel gear 503 and the third-stage transition gear 504, through a pair of meshing spiral bevel gears, rotate the direction of the power output from the powertrain 501 by 90° and transmit it to the caliper head gear 201.

[0030] In this utility model, the powertrain 501 scheme is to use a DC motor, which is powered by a battery, and the controller realizes the forward and reverse rotation and parameter adjustment of the DC motor.

[0031] In this utility model, the second option of power assembly 501 adopts a hydraulic motor, which is powered by a hydraulic power source, and the forward rotation, reverse rotation and pressure regulation of the hydraulic motor are realized by a hydraulic reversing valve.

[0032] Preferably, the housing assembly 1 is made of aluminum alloy to reduce weight and facilitate transportation and operation.

[0033] As attached Figure 3As shown, in this utility model, another embodiment of the brake reset mechanism adopts a brake spring 408 structure, which includes a brake disc 406, a brake bolt 407, a brake spring 408, a brake steel plate 409, a friction plate 410, a reversing pin 411, and a stop pin 412. The brake disc 406 is fixed to the outside of the upper cover 101 by the brake bolt 407 and the brake spring 408. The brake steel plate 409 is connected to the jaw plate frame 202 of the caliper clamping mechanism 2. There are two friction plates 410, one of which is fixed to the inside of the brake disc 406 and the other is fixed to the outside of the upper cover 101. The brake steel plate 409 is clamped between the two friction plates 410. The stop pin 412 is fixed on the large gear 201 of the caliper head, and the reversing pin 411 is set in the slot of the brake steel plate 409.

[0034] During the clamping operation, the reversing pin 405 is inserted into the pin hole of the brake disc 401 at the clamping position (the reversing pin 411 rotates to the clamping position). The power assembly 501 drives the large gear 201 of the pliers head to rotate clockwise. At this time, the jaw plate frame 202 is braked and does not rotate by the brake reset mechanism 4, forcing the jaw plate assembly 204 to move uphill along the ramp 203. The jaw plate assembly 204 moves towards the center of the pliers head within the square hole of the jaw plate frame 202 until it clamps the tubing string, causing the tubing string to rotate in the clamping direction. After reaching the appropriate clamping torque, The large gear 201 of the jaw stops rotating; the power assembly 501 then drives the large gear 201 of the jaw to rotate counterclockwise. At this time, the jaw plate frame 202 is braked by the brake reset mechanism 4, which forces the jaw plate assembly 204 to slide back along the slope plate 203. The jaw plate assembly 204 releases the tube column, and the reset spring 205 drives the jaw plate assembly 204 to retract back to the initial position. The large gear 201 of the jaw continues to rotate until the opening of the brake reset mechanism 4 and the opening of the housing assembly 1 coincide and stop rotating, thus completing one clamping operation.

[0035] During the uncoupling operation, the reversing pin 405 is inserted into the pin hole of the brake disc 401 at the uncoupling position (the reversing pin 411 rotates to the uncoupling position). The power assembly 501 drives the large gear 201 of the jaw head to rotate counterclockwise. At this time, the jaw plate frame 202 is braked and does not rotate by the brake reset mechanism 4, forcing the jaw plate assembly 204 to move uphill along the ramp 203 in the opposite direction. The jaw plate assembly 204 moves towards the center of the jaw head in the square hole of the jaw plate frame 202 until it clamps the string, causing the string to rotate in the uncoupling direction until the string is uncoupled. The large gear 201 of the jaw stops rotating; the power assembly 501 then drives the large gear 201 of the jaw to rotate clockwise in the opposite direction. At this time, the jaw plate frame 202 is braked by the brake reset mechanism 4, which forces the jaw plate assembly 204 to slide back along the slope plate 203. The jaw plate assembly 204 loosens the tubing column, and the reset spring 205 drives the jaw plate assembly 204 to retract back to the initial position. The large gear 201 of the jaw continues to rotate until the opening of the brake reset mechanism 4 and the opening of the housing assembly 1 coincide and stop rotating, thus completing one unhooking operation.

Claims

1. A portable pipe operation power tongs, comprising a housing assembly, a tong head clamping mechanism, a centralizing assembly, a brake reset mechanism, a power transmission assembly, the housing assembly comprising an upper cover, a lower shell, a handle; the tong head clamping mechanism is arranged at the front of the housing assembly, comprising a tong head gear, a jaw plate frame, a slope plate, a jaw plate assembly, a reset spring, the slope plate is arranged in the inner wall of the tong head gear, the jaw plate frame is arranged in the inner cavity of the tong head gear, the jaw plate assembly is arranged in the four square holes on both sides of the jaw plate frame, characterized in that: the reset spring is arranged on both sides of the four square holes of the jaw plate frame, one end of the reset spring hooks the jaw plate assembly, and the other end abuts against the jaw plate frame; the centralizing assembly comprises a lower centralizing frame, a middle centralizing frame, an upper centralizing frame, a centralizing shaft, and a centralizing wheel, the lower centralizing frame is fixed to the inner side of the lower shell, the middle centralizing frame is fixed to the inner side of the upper cover, the upper centralizing frame is fixed to the outer side of the upper cover, the centralizing wheel is arranged on the lower centralizing frame, the middle centralizing frame, and the upper centralizing frame through the centralizing shaft, and the centralizing wheels on the lower centralizing frame and the middle centralizing frame are arranged in the annular centralizing grooves at both ends of the tong head gear to support and centralize the tong head clamping mechanism; the brake reset mechanism comprises a brake disc, a brake belt, a fixed seat, an adjusting bolt, and a reversing pin, the brake disc is connected with the jaw plate frame of the tong head clamping mechanism, and the fixed seat is fixed to the outer side of the upper shell; the centralizing wheel on the upper centralizing frame is arranged in the annular centralizing groove on the inner side of the brake disc to support and centralize the brake reset mechanism; the brake belt wraps around the outer circle of the brake disc, and both ends of the brake belt are connected with the fixed seat through the adjusting bolt; the reversing pin passes through the reversing pin hole on the brake disc and extends into the reversing groove hole arranged on the tong head gear; the power transmission assembly is composed of a power assembly, a primary reducer, a secondary conical reduction gear, and a tertiary transition reduction gear; the power transmission assembly is arranged at the tail of the housing assembly, the output shaft axis of the power assembly intersects and is perpendicular to the axis of the clamped pipe column; the primary reducer, the secondary conical reduction gear, and the tertiary transition reduction gear are arranged in sequence on the transmission route between the power assembly and the tong head gear, wherein the secondary conical reduction gear and the tertiary transition reduction gear rotate 90° to the direction of the power assembly output power through a pair of meshing arc tooth bevel gears and then transmit the power to the tong head gear.

2. A portable power tongs for use in pipe work according to claim 1, characterised in that: In the first power assembly scheme, a DC motor is used, which is powered by a storage battery, and the forward rotation, reverse rotation, and parameter adjustment of the DC motor are realized by a controller.

3. The portable pipe running power tongs of claim 1, wherein: In the second power assembly scheme, a hydraulic motor is used, which is powered by a hydraulic power source, and the forward rotation, reverse rotation, and pressure adjustment of the hydraulic motor are realized by a hydraulic reversing valve.

4. The portable pipe running power tongs of claim 1, wherein: The housing assembly is made of aluminum alloy material.

5. The portable pipe running power tongs of claim 1, wherein: Another scheme of the brake reset mechanism is to use a brake spring structure, which includes a brake disc, a brake bolt, a brake spring, a brake steel sheet, a friction sheet, a reversing pin, and a blocking pin. The brake disc is fixed outside the upper cover through the brake bolt and the brake spring. The brake steel sheet is connected with the jaw plate frame of the jaw clamping mechanism. The friction sheet is two pieces, one of which is fixed inside the brake disc, and the other is fixed outside the upper cover. The brake steel sheet is clamped between the two friction sheets. The blocking pin is fixed on the jaw gear. The reversing pin is arranged in the groove hole of the brake steel sheet.

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