CN210317207U - Safety protection device for opening door of hydraulic power tongs - Google Patents
Safety protection device for opening door of hydraulic power tongs Download PDFInfo
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- CN210317207U CN210317207U CN201921351738.7U CN201921351738U CN210317207U CN 210317207 U CN210317207 U CN 210317207U CN 201921351738 U CN201921351738 U CN 201921351738U CN 210317207 U CN210317207 U CN 210317207U
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- hydraulic power
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- opening door
- crank
- rocker mechanism
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Abstract
The utility model relates to a hydraulic power pincers opening door safety device, include: the hydraulic power tong comprises a hydraulic power tong body, a hydraulic motor, a crank rocker mechanism and a flexible shaft. The hydraulic power tongs body is provided with an opening door; the crank rocker mechanism is arranged on the door edge of the opening door, and when the opening door is closed and opened, the opening door is linked with a crank in the crank rocker mechanism, so that the crank rotates around a hinge shaft for a set angle, and meanwhile, the guide rod is driven to slide in the sliding block; one end of the flexible shaft is connected with a guide rod in the crank rocker mechanism, and the other end of the flexible shaft is connected with the guide shaft; the guide shaft drives the valve core of the two-position two-way motor-driven reversing valve to move, so that the oil supply path is connected or disconnected, and the interlocking safety protection function of the opening and closing of the opening door of the hydraulic power tongs and the operation and disconnection of the hydraulic motor is achieved. The utility model has the advantages of reasonable design, simple structure, good interlocking effect and high safety factor.
Description
Technical Field
The utility model relates to a safety device especially relates to a safety device of hydraulic power pincers opening door, belongs to safety protection technical field.
Background
The hydraulic power tongs for oil field pipes are a screwing-off operation mechanical device which is driven by hydraulic pressure to complete the fastening and loosening of pipe drilling tools, and are also a rotary power device with extremely high danger coefficient. In modern oil field drilling operation, hydraulic power tongs for oil field pipes must be equipped with reliable safety protection devices. The traditional safety protection device for the opening door of the hydraulic power tongs for the oil field pipe has various types, and the protection devices with various structures can play the safety linkage protection role of the opening door and a hydraulic driving system to different degrees in actual use, but the defects of low response speed, poor reliability, complex structure and the like generally exist. In order to effectively avoid, prevent and control the occurrence of safety accidents in the oil field drilling operation and ensure the safe production, the improvement of the safety protection device of the hydraulic power tongs for the existing oil field pipe is still the subject of worthy research by technical personnel in the field.
Disclosure of Invention
The drawback that exists to current hydraulic power pincers safety device for oil field pipe in practical application, the utility model provides a hydraulic power pincers opening door safety device aims at opening and closing the switch-on and the disconnection of the rotatory power equipment oil circuit of action linkage through hydraulic power pincers opening door, realizes the purpose of oil field drilling operation safety accident-free.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a hydraulic power tong open door safety device, comprising: the hydraulic power tongs comprise a hydraulic power tongs body, a hydraulic motor, a crank rocker mechanism, a flexible shaft, a moving pair and a hydraulic control loop, wherein the hydraulic power tongs body is provided with an opening, and the opening is provided with an opening door; the hydraulic control loop comprises a hydraulic pump and a two-position two-way motor-driven reversing valve, and the hydraulic pump can provide pressure oil for the hydraulic motor through a slide valve of the two-position two-way motor-driven reversing valve; the hydraulic motor drives the hydraulic power tongs to tightly or loosely buckle the oil pipe; the sliding pair consists of a guide sleeve, a guide shaft and a spring, the guide sleeve is fixed on the hydraulic power tongs body, the guide shaft slides in the guide sleeve and is propped against one end by the acting force of the spring, and the sliding pair is characterized in that:
the crank rocker mechanism is arranged on the door edge of the opening door, and when the opening door is closed and opened, the opening door is linked with a crank in the crank rocker mechanism, so that the crank rotates around a hinge shaft for a set angle, and meanwhile, the guide rod is driven to slide in the sliding block;
one end of the flexible shaft is connected with a guide rod in the crank rocker mechanism, and the other end of the flexible shaft is connected with the guide shaft;
the guide shaft drives the valve core of the two-position two-way motor-driven reversing valve to move, so that the oil supply path is connected or disconnected.
Further, the two-position two-way motor-driven reversing valve is in a normally closed state.
When the opening door closes the opening of the hydraulic power tongs, the crank in the crank rocker mechanism is tightly attached to the opening door, the two-position two-way motor-driven reversing valve is in the connection position, and the hydraulic loop supplies pressure oil to the hydraulic motor; when the opening door is opened, a crank in the crank rocker mechanism rotates anticlockwise around the hinge shaft under the action of the elastic force of the spring, and meanwhile, the flexible shaft and the guide shaft drive a valve core in the two-position two-way motor-driven reversing valve to move leftwards so that a hydraulic loop is in a disconnected state, and the hydraulic motor cannot rotate, so that the interlocking safety protection effect is achieved.
The utility model has the advantages of reasonable design, simple structure, good interlocking effect and high safety factor.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present invention.
In the attached fig. 1: 1 is a hydraulic power tong, 2 is a hydraulic motor, 3 is a hydraulic pump, 4 is a two-position two-way motor-driven reversing valve, 5 is a spring, 6 is a guide sleeve, 7 is a guide shaft, 8 is a flexible shaft, 9 is a crank rocker mechanism, and 10 is an opening door; a is a crank, b is a frame, c is a rocking block, and d is a guide rod; p is an oil inlet and A is an oil outlet.
Detailed Description
The invention will be further explained with reference to the drawings:
as shown in figure 1: an opening is arranged on the clamp body of the hydraulic power clamp 1, and an opening door 10 is arranged on the opening; the hydraulic pump 3 can provide pressure oil for the hydraulic motor 2 through a slide valve of a two-position two-way motor-driven reversing valve 4; the hydraulic motor 2 drives a hydraulic power tong to tightly or loosely buckle the oil pipe; the guide sleeve 6 is fixed on the clamp body of the hydraulic power clamp 1; the guide shaft 7 slides in the guide sleeve 6 and is propped against one end under the action of the elastic force of the spring 5; the frame b in the crank rocker mechanism 9 is arranged on the door edge of the opening door 10, and when the opening door 10 is closed and opened, the opening door 10 is linked with the crank a in the crank rocker mechanism 9, so that the crank a rotates around the hinge shaft for a set angle, and meanwhile, the guide rod d is driven to slide in the slide block c; one end of the flexible shaft 8 is connected with a guide rod d in the crank rocker mechanism 9, and the other end is connected with the guide shaft 7; the guide shaft 7 drives the valve core in the two-position two-way motor-driven reversing valve 4 to move, so that the oil supply circuit is connected or disconnected, and the two-position two-way motor-driven reversing valve 4 is in a normally closed state.
When the utility model is used, when the opening door 10 is in the opening state of normally closing the hydraulic power tongs 1, the crank a in the crank rocker mechanism 9 is tightly attached to the opening door 10, the two-position two-way motor-driven reversing valve 4 is in the working position, the oil inlet P is communicated with the oil outlet A, the hydraulic pump 3 supplies pressure oil to the hydraulic motor 2, and the hydraulic power tongs 1 normally work; when the opening door 10 is opened, a crank a in the crank rocker mechanism 9 rotates anticlockwise around a hinge shaft under the action of the elastic force of the spring 5, meanwhile, the flexible shaft 8 and the guide shaft 7 drive a valve core in the two-position two-way motor-driven reversing valve 4 to move left to enable the two-position two-way motor-driven reversing valve 4 to be in a normal state, an oil inlet P is disconnected with an oil outlet A, an oil supply path of the hydraulic pump 3 and the hydraulic motor 2 is cut off, and the hydraulic motor 2 stops rotating, so that the interlocking safety protection effect of the operation and disconnection of the opening door 10 of the hydraulic power tongs and the hydraulic motor 2 is achieved.
Claims (2)
1. A hydraulic power tong open door safety device, comprising: the hydraulic power tongs comprise a hydraulic power tongs body, a hydraulic motor, a crank rocker mechanism, a flexible shaft, a moving pair and a hydraulic control loop, wherein the hydraulic power tongs body is provided with an opening, and the opening is provided with an opening door; the hydraulic control loop comprises a hydraulic pump and a two-position two-way motor-driven reversing valve, and the hydraulic pump can provide pressure oil for the hydraulic motor through a slide valve of the two-position two-way motor-driven reversing valve; the hydraulic motor drives the hydraulic power tongs to tightly or loosely buckle the oil pipe; the sliding pair consists of a guide sleeve, a guide shaft and a spring, the guide sleeve is fixed on the hydraulic power tongs body, the guide shaft slides in the guide sleeve and is propped against one end by the acting force of the spring, and the sliding pair is characterized in that:
the crank rocker mechanism is arranged on the door edge of the opening door, and when the opening door is closed and opened, the opening door is linked with a crank in the crank rocker mechanism, so that the crank rotates around a hinge shaft for a set angle, and meanwhile, the guide rod is driven to slide in the sliding block;
one end of the flexible shaft is connected with a guide rod in the crank rocker mechanism, and the other end of the flexible shaft is connected with the guide shaft;
the guide shaft drives the valve core of the two-position two-way motor-driven reversing valve to move, so that the oil supply path is connected or disconnected.
2. The hydraulic power tong open door safety guard as claimed in claim 1, wherein: the two-position two-way motor-driven reversing valve is in a normally closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351738.7U CN210317207U (en) | 2019-08-20 | 2019-08-20 | Safety protection device for opening door of hydraulic power tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351738.7U CN210317207U (en) | 2019-08-20 | 2019-08-20 | Safety protection device for opening door of hydraulic power tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210317207U true CN210317207U (en) | 2020-04-14 |
Family
ID=70130664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921351738.7U Active CN210317207U (en) | 2019-08-20 | 2019-08-20 | Safety protection device for opening door of hydraulic power tongs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210317207U (en) |
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2019
- 2019-08-20 CN CN201921351738.7U patent/CN210317207U/en active Active
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