Hand twisting prevention device of well repair power tongs

Abstract

The utility model relates to the technical field of oil field well repair power tongs equipment, in particular to a hand twisting prevention device for well repair power tongs. A working oil port A of a reversing valve of the device is connected with an oil inlet of a stop valve through a pipeline, an oil outlet of the stop valve is connected with a working oil port A of a hydraulic motor through a pipeline, and a working oil port B of the hydraulic motor is connected with a working oil port B of the reversing valve; the stop valve is a two-position two-way reversing valve with an operating rod, and a pressing plate is arranged on the side face of the hydraulic clamp valve. When the hydraulic clamp valve is closed, the pressing plate presses the operating rod of the stop valve, and the stop valve is opened; when the hydraulic clamp valve is opened, the pressing plate leaves the operating rod of the stop valve, and the stop valve is closed. When the safety door of the workover power tongs is opened, the workover power tongs automatically stop rotating, when the safety door is closed, the workover power tongs are automatically opened, the using process is safe and reliable, and the accident that the hands of workers are hanged and hurt is avoided.

Description

Technical fields:

[0001] This utility model relates to the technical field of oilfield workover power tongs equipment, and in particular to a workover power tongs anti-winding device. Background technology:

[0002] At oil well workover sites, the workover tongs are the most commonly used workover equipment. When in use, pulling the hydraulic valve operating lever of the workover tongs generally causes the connected hydraulic valve to move its reversing shaft, switching the hydraulic circuit of the tongs. This allows the hydraulic tongs to rotate axially, starting and stopping, thus achieving the purpose of disassembling the tubing.

[0003] Currently, well workover tongs are generally equipped with a valve at the opening of the tongs body. Under normal operation, the valve is usually closed to provide protection. However, during tubing disassembly or installation, if the valve of the well workover tongs is open and a worker accidentally puts their hand into the tongs, the well workover tongs may rotate unexpectedly, causing serious personal injury. Utility Model Content:

[0004] The technical problem to be solved by this utility model is to provide a well workover tongs anti-entanglement device. This device realizes that when the well workover tongs valve is open, the well workover tongs automatically stops rotating, and when the valve is closed, the well workover tongs automatically opens. The use process is safe and reliable, and avoids the accident of people being entangled.

[0005] The technical solution adopted by this utility model is: a well repair power tong anti-winding device, including a hydraulic tong housing, a hydraulic tong valve connected to the hydraulic tong housing, a reversing valve and a hydraulic motor disposed on the outside of the hydraulic tong housing; the working port A of the reversing valve is connected to the inlet of the shut-off valve through a pipeline, the outlet of the shut-off valve is connected to the working port A of the hydraulic motor through a pipeline, and the working port B of the hydraulic motor is connected to the working port B of the reversing valve;

[0006] The shut-off valve is a two-position two-way directional valve with an operating lever, and a pressure plate is provided on the side of the hydraulic clamp valve; when the hydraulic clamp valve is closed, the pressure plate presses the operating lever of the shut-off valve, and the shut-off valve opens; when the hydraulic clamp valve is opened, the pressure plate moves away from the operating lever of the shut-off valve, and the shut-off valve closes.

[0007] Furthermore, the directional valve is a three-position four-way hydraulic manual directional valve.

[0008] Furthermore, the shut-off valve is connected to the upper end face of the hydraulic clamp housing via a connecting plate.

[0009] Furthermore, a door closer is provided on the lower outer side of the hydraulic clamp valve. The main body of the door closer is installed on the outer side of the hydraulic clamp valve, and the other end of the door closer is connected to the outer wall of the hydraulic clamp housing through a fixing plate.

[0010] The beneficial effects of this utility model are:

[0011] 1. When the valve of the workover tongs is opened, the workover tongs automatically stop rotating; when the valve is closed, the workover tongs automatically open. The process is safe and reliable, preventing accidents that could cause people to get their hands caught in the tongs.

[0012] 2. Simple structure and easy operation. Attached image description:

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of a gate valve. Detailed implementation method:

[0016] like Figure 1 As shown, a well workover tongs anti-winding device includes a hydraulic tongs housing 1, a hydraulic tongs valve 2 connected to the hydraulic tongs housing 1, a reversing valve 3 and a hydraulic motor 4 disposed on the outside of the hydraulic tongs housing 1; the working port A of the reversing valve 3 is connected to the inlet of the shut-off valve 5 through a pipeline, the outlet of the shut-off valve 5 is connected to the working port A of the hydraulic motor 4 through a pipeline, and the working port B of the hydraulic motor 4 is connected to the working port B of the reversing valve 3.

[0017] like Figure 2 As shown, the shut-off valve 5 is a two-position two-way directional valve with an operating lever, and a pressure plate 7 is provided on the side of the hydraulic clamp valve 2; when the hydraulic clamp valve 2 is closed, the pressure plate 7 presses the operating lever of the shut-off valve 5, and the shut-off valve 5 opens; when the hydraulic clamp valve 2 is opened, the pressure plate 7 moves away from the operating lever of the shut-off valve 5, and the shut-off valve 5 closes.

[0018] The reversing valve 3 is a three-position four-way hydraulic manual reversing valve.

[0019] The shut-off valve 5 is connected to the upper end face of the hydraulic clamp housing 1 via a connecting plate 6.

[0020] A door closer 8 is provided on the lower outer side of the hydraulic clamp valve 2. The main body of the door closer 8 is installed on the outer side of the hydraulic clamp valve 2, and the other end of the door closer 8 is connected to the outer wall of the hydraulic clamp housing 1 through a fixing plate 9.

[0021] When the hydraulic clamp is in operation, the hydraulic clamp valve 2 is in the closed state, and the pressure plate 7 of the hydraulic clamp valve 2 directly presses against the operating rod of the shut-off valve 5, ensuring unobstructed oil flow in the shut-off valve 5 and enabling the hydraulic clamp to rotate. When the hydraulic clamp valve 2 is in the open state, the operating rod of the shut-off valve 5 returns to the closed state, blocking the hydraulic oil flow and preventing the hydraulic clamp from rotating, thus avoiding a safety entanglement accident.

[0022] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A well-workover power tong anti-winding device, comprising a hydraulic tong housing (1), a hydraulic tong valve (2) connected to the hydraulic tong housing (1), a reversing valve (3) disposed on the outside of the hydraulic tong housing (1), and a hydraulic motor (4); characterized in that: The working port A of the reversing valve (3) is connected to the inlet of the shut-off valve (5) through a pipeline, the outlet of the shut-off valve (5) is connected to the working port A of the hydraulic motor (4) through a pipeline, and the working port B of the hydraulic motor (4) is connected to the working port B of the reversing valve (3). The shut-off valve (5) is a two-position two-way directional valve with an operating lever. The hydraulic clamp valve (2) is provided with a pressure plate (7) on its side. When the hydraulic clamp valve (2) is closed, the pressure plate (7) presses the operating lever of the shut-off valve (5) and the shut-off valve (5) opens. When the hydraulic clamp valve (2) is opened, the pressure plate (7) leaves the operating lever of the shut-off valve (5) and the shut-off valve (5) closes.

2. The well workover power tongs anti-entanglement device according to claim 1, characterized in that: The reversing valve (3) is a three-position four-way hydraulic manual reversing valve.

3. The well workover power tongs anti-entanglement device according to claim 1, characterized in that: The shut-off valve (5) is connected to the upper end face of the hydraulic clamp housing (1) via a connecting plate (6).

4. The well workover power tongs anti-entanglement device according to claim 1, characterized in that: A door closer (8) is provided on the lower outer side of the hydraulic clamp valve (2). The main body of the door closer (8) is installed on the outer side of the hydraulic clamp valve (2), and the other end of the door closer (8) is connected to the outer wall of the hydraulic clamp housing (1) through a fixing plate (9).

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