CN-121993448-A - Bidirectional hydraulic back-up wrench hydraulic control device

CN121993448ACN 121993448 ACN121993448 ACN 121993448ACN-121993448-A

Abstract

The application relates to the technical field of hydraulic control, in particular to a bidirectional hydraulic back-up wrench hydraulic control device which comprises an oil inlet connecting plate, an oil return connecting plate, a main wrench reversing valve assembly, a first back-up wrench reversing valve assembly, a second back-up wrench reversing valve assembly and a hydraulic motor. The valve core positions in the first back-up wrench reversing valve assembly, the second back-up wrench reversing valve assembly and the main wrench reversing valve assembly are respectively adjusted through adjusting the first handle, the second handle and the main wrench hydraulic pull rod, so that the working states of the first oil cylinder, the second oil cylinder and the hydraulic motor are conveniently adjusted.

Inventors

JIANG WENQI
YANG RUNQIAN
SUN JING
WANG JIANYU
TANG JUNYAO
WANG WEIJIAN
MA WEI
YU QUN
HAN YANLIN
DONG WEIGUO
SUN BIN
JIANG JIANGUANG

Assignees

莱州市霸力石油机械有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. A bi-directional hydraulic back-up wrench hydraulic control device, comprising: The oil inlet connecting plate (1), the oil inlet connecting plate (1) is communicated with an oil inlet port (11); the oil return connecting plate (2) is communicated with an oil outlet port (21); The main clamp reversing valve assembly (3), the main clamp reversing valve assembly (3) comprises a first three-position four-way reversing valve (31) with a main clamp hydraulic pull rod (32), and an oil inlet P1 of the main clamp reversing valve assembly (3) is communicated with an oil outlet of the oil inlet connecting plate (1); The first back-up tong reversing valve assembly (4), the first back-up tong reversing valve assembly (4) comprises a second three-position four-way reversing valve (41) with a first back-up tong hydraulic pull rod (42), an oil inlet P2 of the first back-up tong reversing valve assembly (4) is communicated with an oil outlet T1 of the main tong reversing valve assembly (3), a third working port A2 and a fourth working port B2 of the second three-position four-way reversing valve (41) are connected with a first oil cylinder (46), and the first oil cylinder (46) is used for controlling the working state of a first back-up tong; the second back-up wrench reversing valve assembly (5), the second back-up wrench reversing valve assembly (5) comprises a third three-position four-way reversing valve (51) with a second back-up wrench hydraulic pull rod (52), an oil inlet P3 of the second back-up wrench reversing valve assembly (5) is communicated with an oil outlet T2 of the first back-up wrench reversing valve assembly (4), a fifth working port A3 and a sixth working port B3 of the third three-position four-way reversing valve (51) are connected with a second oil cylinder (56), and the second oil cylinder (56) is used for controlling the working state of the second back-up wrench, and the oil outlet T3 of the second back-up wrench reversing valve assembly (5) is communicated with an oil inlet of the oil inlet connecting plate (1); And two ports of the hydraulic motor (6) are respectively connected with the first working port A1 and the second working port B1 of the main clamp reversing valve assembly (3).
2. A bi-directional hydraulic back-up tong hydraulic control device according to claim 1, characterized in that the first back-up tong reversing valve assembly (4) further comprises two first overflow valves (43), both of the first overflow valves (43) being in communication with the third working port A2 and the fourth working port B2 of the second three-position four-way reversing valve (41).
3. A bi-directional hydraulic back-up tong hydraulic control device according to claim 1, characterized in that the second back-up tong reversing valve assembly (5) further comprises two second overflow valves (53), both second overflow valves (53) being in communication with the fifth working port A3 and the sixth working port B3 of the third three-position four-way reversing valve (51).
4. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, wherein a third overflow valve (61) and a three-way pipe (62) are arranged between the hydraulic motor (6) and the main wrench reversing valve assembly (3), one end of the third overflow valve (61) is communicated with the hydraulic motor (6), the other end of the third overflow valve (61) is communicated with the main wrench reversing valve assembly (3) through the three-way pipe (62), and the other port of the three-way pipe (62) is connected with a pressure gauge (63).
5. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, wherein a first cavity (12) communicated with an oil inlet port (11) is formed in the oil inlet connecting plate (1), a first oil outlet channel (13) and a first oil inlet channel (14) communicated with the first cavity (12) are formed in the oil inlet connecting plate (1), the first oil inlet channel (14) is communicated with the oil inlet port (11), and a fourth overflow valve (15) communicated with the first oil inlet channel (14) is arranged in the oil inlet connecting plate (1).
6. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, wherein a second cavity (22) is formed in the oil return connecting plate (2), the second cavity (22) is communicated with the oil outlet port (21) and the oil inlet of the oil return connecting plate (2), a fifth oil return channel (54) matched with a fifth working port A3 and a sixth oil return channel (55) matched with a sixth working port B3 are formed in the second back-up wrench reversing valve assembly (5), the fifth oil return channel (54) and the sixth oil return channel (55) are communicated with the second cavity (22), a third oil return channel (44) matched with a third working port A2 and a fourth oil return channel (45) matched with a fourth working port B2 are formed in the first back-up wrench reversing valve assembly (4), the third oil return channel (44) is communicated with the fifth oil return channel (54), the fourth oil return channel (45) is communicated with the sixth oil return channel (55), and the oil return channel (44) matched with the first working port A2 is communicated with the first oil return channel (33) and the second reversing valve assembly (33).
7. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, wherein the main wrench hydraulic pull rod (32), the first back-up wrench hydraulic pull rod (42) and the second back-up wrench hydraulic pull rod (52) are respectively connected with corresponding valve cores of the first three-position four-way reversing valve (31), the second three-position four-way reversing valve (41) and the third three-position four-way reversing valve (51) through a connecting assembly (9), the connecting assembly (9) comprises a connecting rod (91), a first clamping arm (92) and a second clamping arm (93), one end of the connecting rod (91) is hinged with the first clamping arm (92) through a first pin shaft (94), the other end of the connecting rod (91) is hinged with the second clamping arm (93) through a second pin shaft (95), one end of the first clamping arm (92) away from the connecting rod (91) is hinged with the corresponding valve core end, and one end of the second clamping arm (93) away from the connecting rod (91) is connected with the corresponding main wrench hydraulic pull rod (32), the first back-up wrench hydraulic pull rod (42) and the second back-up wrench hydraulic pull rod (52).
8. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 7, further comprising a fixing frame (8), wherein the fixing frame (8) is hinged with a first handle (81) through a fourth pin shaft (83), the fixing frame (8) is hinged with a second handle (82) through a fifth pin shaft (84), the end part of the first handle (81) is hinged with a third clamping arm (85) through a sixth pin shaft (86), one end, far away from the first handle (81), of the third clamping arm (85) is fixedly connected with the end part of the first back-up wrench hydraulic pull rod (42), the end part of the second handle (82) is hinged with a fourth clamping arm (87) through a seventh pin shaft (88), and one end, far away from the second handle (82), of the fourth clamping arm (87) is fixedly connected with the end part of the second back-up wrench hydraulic pull rod (52).
9. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, further comprising a back tailstock (7) and a protection frame (71), wherein the protection frame (71) is installed on the back tailstock (7), and the oil inlet connecting plate (1), the main wrench reversing valve assembly (3), the second back-up wrench reversing valve assembly (5) and the oil return connecting plate (2) are sequentially installed on the back tailstock (7) and are located in the protection frame (71).
10. The bidirectional hydraulic back-up wrench hydraulic control device according to claim 1, wherein a circulating pump is connected between the oil inlet port (11) and the oil outlet port (21).

Description

Bidirectional hydraulic back-up wrench hydraulic control device Technical Field The application relates to the technical field of hydraulic control, in particular to a bidirectional hydraulic back-up wrench hydraulic control device. Background The back-up clamp of the oil pipe is a fixed clamping device which is matched with a main clamp (power clamp) in oil drilling and workover operation, and has the core effects of firmly clamping a pipe column coupling or a body when the oil pipe is on and off, providing reactive torque support, preventing the pipe column from rotating along with the main clamp and ensuring reliable disassembly and assembly of threaded connection. The tool is a necessary tool for improving the working efficiency, reducing the labor intensity and guaranteeing the safety of a wellhead. The related art can refer to the Chinese patent with publication number CN221761851U, it discloses a multi-functional back-up tong head for oil pipe power tong, including the tong head body, the front end of tong head body is provided with the oil pipe clamping structure that locks oil pipe, oil pipe clamping structure is including two drive plates, the upper end of two drive plates evenly spaced fixedly connected with a plurality of flexible bands, the upper end of flexible band is provided with oil pipe clamping reinforced structure, oil pipe clamping reinforced structure is including the ribbon, the outer wall evenly spaced sliding connection of ribbon has a plurality of clamping blocks, the draw-in groove has been seted up to the lower extreme of ribbon, the draw-in groove is used for carrying out slip joint with the upper end of flexible band. For the related art in the above, the conventional oil pipe back-up wrench is usually a single-layer back-up wrench, the single-layer back-up wrench only depends on a group of jaw plate assemblies to provide reactive torque, the maximum torque is limited by the structural strength and clamping force of a single wrench body, the double-layer back-up wrench is adopted for large-pipe oil pipes, the double-side back-up wrench comprises a first back-up wrench and a second back-up wrench, the hydraulic circuit of the conventional device is complex in design, the valve cooperativity is poor, and the stability under severe working environment is insufficient. Disclosure of Invention In order to conveniently control the working states of two back-ups, the application provides a bidirectional hydraulic back-up hydraulic control device. The application provides a bidirectional hydraulic back-up wrench hydraulic control device, which adopts the following technical scheme: a bi-directional hydraulic back-up wrench hydraulic control device, comprising: The oil inlet connecting plate is communicated with an oil inlet port; the oil return connecting plate is communicated with an oil outlet port; the main clamp reversing valve assembly comprises a first three-position four-way reversing valve with a main clamp hydraulic pull rod, and an oil inlet of the main clamp reversing valve assembly is communicated with an oil outlet of the oil inlet connecting plate; The first back-up tong reversing valve assembly comprises a second three-position four-way reversing valve with a first back-up tong hydraulic pull rod, an oil inlet of the first back-up tong reversing valve assembly is communicated with an oil outlet of the main tong reversing valve assembly, two working ports of the second three-position four-way reversing valve are connected with a first oil cylinder, and the first oil cylinder is used for controlling the working state of the first back-up tong; The second back-up tong reversing valve assembly comprises a third three-position four-way reversing valve with a second back-up tong hydraulic pull rod, an oil inlet of the second back-up tong reversing valve assembly is communicated with an oil outlet of the first back-up tong reversing valve assembly, two working ports of the third three-position four-way reversing valve are connected with a second oil cylinder, and the second oil cylinder is used for controlling the working state of the second back-up tong; The oil outlet of the second back-up wrench reversing valve assembly is communicated with the oil inlet of the oil inlet connecting plate; And two ports of the hydraulic motor are respectively connected with the first working port A1 and the second working port B1 of the main clamp reversing valve assembly. Optionally, the first back-up wrench reversing valve assembly further comprises two first overflow valves, and the two first overflow valves are communicated with a third working port A2 and a fourth working port B2 of the second three-position four-way reversing valve. Optionally, the second back-up wrench reversing valve assembly further comprises two second overflow valves, and the two second overflow valves are both communicated with a fifth working port A3 and a sixth working port B3 of the third three-position four-w