CN210509081U

CN210509081U - Door control protection device of open type hydraulic power tongs

Info

Publication number: CN210509081U
Application number: CN201921326858.1U
Authority: CN
Inventors: 乔从华
Original assignee: YANCHENG TEDA DRILLING AND PRODUCTION EQUIPMENT CO Ltd
Current assignee: YANCHENG TEDA DRILLING AND PRODUCTION EQUIPMENT CO Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-12
Anticipated expiration: 2029-08-16

Abstract

An opening type hydraulic power tong gate control protection device comprises a spring reset gate control valve, a bracket, a flexible shaft, a fixed seat, a pin shaft, a rotating shaft, a stop block, a stop pin, a safety door, a power tong body and a hydraulic motor, wherein two ends of the flexible shaft are respectively connected with the stop block and the spring reset gate control valve; when the door is closed, the stop pin on the safety door is attached to the stop block, the stop block rotates to drive the steel wire flexible shaft in the flexible shaft to pull the valve core, and the hydraulic system forms a passage; when the safety door is opened, the steel wire flexible shaft retracts, the reset spring forcibly pushes the gate control valve to unload, the flexible shaft return pushing stroke and the gap of the flexible shaft head are eliminated, and the hydraulic system is rapidly in an unloading state. The beneficial effects of the utility model are that the safety door control device security of opening power tong is higher, protects operator's personal safety more reliably.

Description

Door control protection device of open type hydraulic power tongs

Technical Field

The utility model relates to a safety device of power tongs for oil drilling and workover, especially the safe automatic safety device of opening type hydraulic power tongs belongs to oil field machinery safety protection technical field.

Background

Due to the safety requirement, the open type power tongs for the oilfield pipe are required to be provided with a safety protection device. The prior open type power tongs are improved for many times and have various safety protection forms. For example, in the utility model patent of chinese patent No. 201320611725.5 entitled "gate control safety protection device for open type hydraulic power tongs", as soon as the safety door is opened, the flexible shaft just drives the gate control valve off-load, so that the safety performance of open type hydraulic power tongs is obviously improved, and the personal safety of operators is protected more reliably. The structure can well solve the safety linkage protection of the safety door and the hydraulic control system in the actual use, the safety door is opened, the flexible shaft drives the hydraulic system to discharge load, and the structure is simple, safe and reliable. However, in the structure, the flexible shaft can drive the gate control valve to unload only by a certain rotation angle along with the opening of the safety door, and the structure cannot be applied to the situation that the unloading is required to be carried out immediately after the door is opened under the condition of higher safety requirement, so that a new protection structure is required for meeting the higher safety protection requirement of the open type power tongs for the oilfield pipe.

Disclosure of Invention

To the higher requirement among the current oil field pipe is with opening type power tong safety protection technique, the utility model provides an opening type hydraulic power tong gate control protection device.

The technical scheme of the utility model is that: an open type hydraulic power tong gate control protection device comprises a spring reset gate control valve, a bracket, a flexible shaft, a fixed seat, a pin shaft, a rotating shaft, a stop block, a stop pin, a safety door, a power tong body and a hydraulic motor, wherein the flexible shaft consists of a flexible shaft joint, a steel wire flexible shaft, a hose joint and a hose; the fixed seat is fixed on the power tong body, one end of the fixed seat is provided with a fixed shaft, and the other end of the fixed seat is provided with a bracket; the emergency exit is installed at the opening part of the power tong body, its characterized in that:

the spring reset gate control valve consists of a valve body, a valve core and a reset spring, and an oil inlet on the valve body is communicated with an oil inlet and an oil return port of the hydraulic motor;

the bracket is fastened and integrated with a valve body of the spring reset gate control valve, and the reset spring is arranged between the bracket and the valve core;

one end of a flexible shaft joint at two ends of the flexible shaft is hinged on the stop block through a pin shaft, and the other end of the flexible shaft joint is fixedly connected to the end part of the valve core; one end of the hose joint at the two ends is fixed on the bracket, and the other end is fixed on the bracket;

the stop block and a fixed shaft on the fixed seat form a revolute pair;

the stop pin is fixed on the safety door, the stop pin is attached to the side face of the stop block when the door is closed, and the side face of the stop block is provided with a transition face.

The transition surface of the side surface of the stop block is an arc surface.

The transition surface of the side surface of the stop block is an inclined surface.

When the safety door is closed until the safety door is to be closed, the stop pin on the safety door slides inwards against the transition surface on the stop block to enable the stop block to rotate around the fixed shaft on the fixed seat, the stop block drives the steel wire flexible shaft in the flexible shaft to pull the valve core to move forwards to a front limit point, an oil inlet P on the valve body is communicated with an oil inlet A, the oil inlet A is communicated with an oil inlet B or C on the hydraulic motor, a passage is formed by the hydraulic system, the hydraulic system works normally, and the reset spring is in a compressed state; when the safety door is opened, the stop pin on the safety door slides outwards against the transition surface on the stop block, the steel wire flexible shaft retracts, the return spring pushes the valve core to move backwards to the rear limit point, the upper oil inlet P and the oil return port O of the valve body are communicated at the moment, hydraulic oil directly returns to the oil tank, the hydraulic system is in an unloading state, the hydraulic power tongs cannot normally operate, and the safety protection effect is achieved.

The beneficial effects of the utility model are that opening power tong's safety gate control device security is higher, and emergency exit is opened, and the wire flexible axle withdrawal, reset spring force promote the gate valve off-load, has eliminated the clearance of flexible axle return push-back idle stroke and flexible axle spindle nose, makes hydraulic system be in the off-load state rapidly, and opening type hydraulic power tong's security performance is showing the improvement like this, protects operator's personal safety more reliably.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic cross-sectional view of D-D in fig. 1.

In fig. 1: 1. a spring-reset gate control valve; 101. a valve body; 102. a valve core; 103. a return spring; 2. a bracket; 3. a flexible shaft; 301. a flexible shaft joint; 302. a steel wire flexible shaft; 303. a hose connector; 304. a hose; 4. a fixed seat; 401. a fixed shaft; 402. a support; 5. a pin shaft; 6. a rotating shaft; 7. a stopper; 8. a stop pin; 9. a safety door; 10. a power tong body; 11. a hydraulic motor; a. a transition surface.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, the utility model comprises a spring reset gate control valve 1, a bracket 2, a flexible shaft 3, a fixed seat 4, a pin shaft 5, a rotating shaft 6, a stop dog 7, a stop pin 8, a safety door 9, a power clamp body 10 and a hydraulic motor 11, wherein the flexible shaft 3 is composed of a flexible shaft joint 301, a steel wire flexible shaft 302, a hose joint 303 and a hose 304; the fixed seat 4 is fixed on the power tong body 10, one end of the fixed seat 4 is provided with a fixed shaft 401, and the other end is provided with a bracket 402; the safety door 9 is arranged at the opening of the power tong body 10, the spring return gate control valve 1 consists of a valve body 101, a valve core 102 and a return spring 103, and the oil port on the valve body 101 is communicated with the oil inlet and the oil return port of the hydraulic motor 11; the bracket 2 is fastened and integrated with a valve body 101 of the spring return gate control valve 1, and the return spring 103 is arranged between the bracket 2 and the valve core 102; one end of a flexible shaft joint 301 at two ends of the flexible shaft 3 is hinged on the stop block 7 through a pin shaft 5, and the other end is fixedly connected with the end part of the valve core 102; one end of the hose joint 303 at the two ends is fixed on the bracket 402, and the other end is fixed on the bracket 2; the stop 7 and the fixed shaft 401 on the fixed seat 4 form a revolute pair; the stop pin 8 is fixed on the safety door 9, the stop pin 8 is attached to the side surface of the stop 7 when the door is closed, and the side surface of the stop 7 is provided with a transition surface a. The transition surface a of the side surface of the stop block 7 is a circular arc surface or an inclined surface.

When the safety door 9 is closed until the safety door 9 is about to be closed, the stop pin 8 on the safety door 9 abuts against the transition surface a on the stop block 7 to slide inwards, so that the stop block 7 rotates around the fixed shaft 401 on the fixed seat 4, the stop block 7 drives the steel wire flexible shaft 302 in the flexible shaft 3 to pull the valve core 102 to move forwards to a front limit point, at the moment, an oil inlet P on the valve body 101 is communicated with an oil inlet A, the oil inlet A is communicated with an oil inlet B or C on the hydraulic motor 11, a passage is formed by the hydraulic system, the hydraulic system normally works, and at the moment, the; when the safety door 9 is opened, the stop pin 8 on the safety door 9 slides outwards by clinging to the transition surface a on the stop block 7, the steel wire flexible shaft 302 retracts, the return spring 103 pushes the valve core 102 to move to the rear limit point, the upper oil inlet P and the oil return O on the valve body 101 are communicated at the moment, hydraulic oil directly returns to the oil tank, the hydraulic system is in an unloading state, and the hydraulic power tongs cannot normally run, so that the safety protection effect is achieved.

Claims

1. An open type hydraulic power tong gate control protection device comprises a spring reset gate control valve, a bracket, a flexible shaft, a fixed seat, a pin shaft, a rotating shaft, a stop block, a stop pin, a safety door, a power tong body and a hydraulic motor, wherein the flexible shaft consists of a flexible shaft joint, a steel wire flexible shaft, a hose joint and a hose; the fixed seat is fixed on the power tong body, one end of the fixed seat is provided with a fixed shaft, and the other end of the fixed seat is provided with a bracket; the emergency exit is installed at the opening part of the power tong body, its characterized in that:

the stop block and a fixed shaft on the fixed seat form a revolute pair;

2. The open-type hydraulic power tong gate control protection device as claimed in claim 1, further characterized by: the transition surface of the side surface of the stop block is an arc surface.

3. The open-type hydraulic power tong gate control protection device as claimed in claim 1, further characterized by: the transition surface of the side surface of the stop block is an inclined surface.