Double-opening type safety protection door of power tongs

Abstract

The utility model provides a double-open type safety protection door of power tongs, and relates to the technical field of petroleum drilling, the safety protection door comprises a left side protection door and a right side protection door, the left side and the right side of a tong head opening of the power tongs are respectively provided with a left side fixing frame and a right side fixing frame, and the left side fixing frame and the left side protection door are arranged in a hinged mode. The right fixing frame and the right protective door are hinged, the left protective door is connected with a left cylinder, the right protective door is connected with a right cylinder, and the left cylinder and the right cylinder are used for driving the left protective door and the right protective door to be opened and closed respectively. The double-opening type safety protection door is reasonable and simple in structure and reliable in working performance, the left side protection door, the right side protection door and the clamp frame safety door are matched to form the double-opening type safety protection door, the left side safety protection door, the right side safety protection door and the clamp frame safety door of the power clamp are opened synchronously, personal injury can be effectively prevented and reduced, and safety is improved. And the opening of the tong head is completely sealed before the tong head of the power tong starts to rotate, so that the rotating part of the power tong is comprehensively isolated from an operator.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, and more specifically, to a double-opening safety door for a power clamp. Background Technology

[0002] When power tongs are used in oil and gas fields, the rotating parts of the tongs are not completely and effectively isolated from the equipment operators, especially at the opening of the tong head. Since they are usually used to move drill pipes in and out, the opening of the tong head of common power tongs is not effectively sealed. The rapidly rotating tong head may cause personal injury to the equipment operators, posing a safety hazard. Utility Model Content

[0003] The purpose of this utility model is to provide a double-opening safety guard door for a power clamp, so as to solve one or more problems mentioned in the background art.

[0004] To achieve the above objectives, one of the objectives of this utility model is to provide a double-opening safety guard door for a power pliers. The safety guard door includes a left guard door and a right guard door. A left fixing frame and a right fixing frame are respectively provided on the left and right sides of the opening of the pliers head. The left fixing frame and the left guard door are hinged together, and the right fixing frame and the right guard door are hinged together. A left cylinder is connected to the left guard door, and a right cylinder is connected to the right guard door. The left cylinder and the right cylinder are used to drive the opening and closing of the left guard door and the right guard door, respectively.

[0005] As one feasible implementation, a clamp frame safety door is also provided on the inner side of the safety guard door. The clamp frame safety door and the left-side fixed frame are hinged together. A clamp frame safety door actuation cylinder is connected to the clamp frame safety door. Under the action of the clamp frame safety door actuation cylinder, the clamp frame safety door opens and closes, and the clamp frame safety door and the left-side fixed frame are fixedly connected. Thus, this structure allows the left and right safety guard doors of the power clamp and the clamp frame safety door to open synchronously, achieving the purpose of completely sealing the opening when the power clamp is operating, thereby isolating the operator from the rotating parts of the power clamp and protecting the operator from injury.

[0006] As one feasible implementation, the left protective door is fixed to the left fixed frame by a left hinge pin, and the other end is hinged and fixed to the left protective door, and swings around the left hinge pin under the drive of the left cylinder. The right protective door is fixed to the right fixed frame by a right hinge pin, and the other end is hinged and fixed to the right protective door, and swings around the right hinge pin under the drive of the right cylinder.

[0007] As one feasible implementation, it also includes a first reversing valve and a second reversing valve, with the first reversing valve provided on the input circuit of the right cylinder and the left cylinder, and the second reversing valve provided on the output circuit of the right cylinder and the left cylinder.

[0008] As one feasible implementation, the input circuit of the left cylinder is equipped with a first speed control valve, the input circuit of the right cylinder is equipped with a second speed control valve, the output circuit of the left cylinder is equipped with a third speed control valve, and the output circuit of the right cylinder is equipped with a fourth speed control valve.

[0009] As one feasible implementation, the input port of the input circuit of the right cylinder and the left cylinder is the air line port A, and the output port of the output circuit of the right cylinder and the left cylinder is the air line port B.

[0010] As one feasible implementation, air line A is also connected to the input port of the clamp frame safety door actuation cylinder via an air line, and the output port of the clamp frame safety door actuation cylinder is connected to air line B via an air line.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This utility model has a reasonable and simple structure and reliable working performance. It adopts a structure in which a left protective door, a right protective door and a clamp frame safety door are combined to form a double-opening safety protective door. This allows the left and right side safety protective doors of the power clamp to open synchronously with the clamp frame safety door, which can effectively prevent and reduce personal injury. The opening of the clamp head is completely sealed before the clamp head starts to rotate, realizing complete isolation between the rotating part of the power clamp and the operator. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a double-opening safety guard door for a power clamp according to the present invention;

[0014] Figure 2 This is a schematic diagram of the pneumatic control principle of a double-opening safety guard door for a power clamp according to this utility model. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-2As shown, this application provides a double-opening safety gate for a power clamp, including a left fixing frame 1, a left protective door 5, a right fixing frame 10, a right protective door 7, a left cylinder 2, a right cylinder 9, a clamp frame safety door 6, a clamp frame safety door actuation cylinder 4, and a control valve assembly. The control valve assembly includes a first reversing valve 3.1 and a second reversing valve 3.2, a first speed regulating valve 2.1, a second speed regulating valve 2.2, a third speed regulating valve 2.3, and a fourth speed regulating valve 2.4. It should be noted that the reversing valve in this application is a two-position three-way valve, and an air pipeline connects the left cylinder, the right cylinder, the clamp frame safety door actuation cylinder, and the control valve assembly to realize the opening and closing of the clamp frame safety door and the left and right doors.

[0017] As shown in the figure, a left fixing frame 1 and a right fixing frame 10 are respectively installed on the left and right sides of the opening of the power pliers. The left fixing frame 1 and the left protective door 5 are hinged together, and the right fixing frame 10 and the right protective door 7 are hinged together. The left protective door 5 is connected to a left cylinder 2, and the right protective door 7 is connected to a right cylinder 9. The left cylinder 2 and the right cylinder 9 are used to drive the opening and closing of the left protective door 5 and the right protective door 7, respectively.

[0018] A clamp frame safety door 6 is installed on the inner side of the safety protection door. The clamp frame safety door 6 is hinged to the left fixed frame 1. A clamp frame safety door actuation cylinder 4 is connected to the clamp frame safety door 6. The clamp frame safety door 6 opens and closes under the action of the clamp frame safety door actuation cylinder 4. The clamp frame safety door 6 is fixedly connected to the left fixed frame 1.

[0019] One end of the left cylinder 2 is fixed to the left fixed frame 1 via the left hinge pin 3, and the other end is hinged to the left protective door 5. The left protective door 5 swings around the left hinge pin 3 under the drive of the left cylinder 2. One end of the right cylinder 9 is fixed to the right fixed frame 10 via the right hinge pin 8, and the other end is hinged to the right protective door 7. The right protective door 7 swings around the right hinge pin 8 under the drive of the right cylinder 9.

[0020] Specifically, a first reversing valve 3.1 is installed on the input circuits of right cylinder 9 and left cylinder 2, and a second reversing valve 3.5 is installed on the output circuits of right cylinder 9 and left cylinder 2. A first speed regulating valve 2.1 is installed on the input circuit of left cylinder 2, a second speed regulating valve 2.2 is installed on the input circuit of right cylinder 9, a third speed regulating valve 2.3 is installed on the output circuit of left cylinder 2, and a fourth speed regulating valve 2.4 is installed on the output circuit of right cylinder 9. The input port of the input circuits of right cylinder 9 and left cylinder 2 is air line port A, and the output port of the output circuits of right cylinder 9 and left cylinder 2 is air line port B. Air line port A is also connected to the input port of clamp frame safety door actuation cylinder 4 via an air line, and the output port of clamp frame safety door actuation cylinder 4 is connected to air line port B via an air line.

[0021] The operating principle of this application is as follows: During use, when air enters through port A of the air line, compressed air enters the rod chamber of cylinder 4, the safety door of the clamp frame, and the piston rises, closing the safety door 6 of the clamp frame. Simultaneously, compressed air enters the rod chambers of the left cylinder 2 and the right cylinder 9 from the left position of the first reversing valve 3.1. Compressed air in the rodless chambers of each cylinder is discharged through port B of the air line. Each cylinder retracts, causing the left protective door 5 and the right protective door 7 to rotate around the left hinge pin 3 and the right hinge pin 8 respectively, thus closing the left and right protective doors. At this time, the safety door 6 of the clamp frame, the left protective door 5, and the right protective door 7 are all closed, providing safety protection for the clamp frame. Simultaneously, the operator is isolated from the rotating parts of the power clamp, achieving the beneficial effects of equipment safety and operator safety.

[0022] When air enters through port B of the air line, compressed air enters the rodless chamber of cylinder 4, the safety door actuation cylinder of the tong frame, the piston descends, and the safety door 6 of the tong frame opens. Simultaneously, compressed air enters the rodless chambers of the left cylinder 2 and the right cylinder 9 from the left position of the second reversing valve 3.2. The compressed air in the rod chambers of each cylinder is discharged through port A of the air line. Each cylinder extends and drives the left protective door 5 and the right protective door 7 to rotate around the left hinge pin 3 and the right hinge pin 8, respectively. The left protective door 5 and the right protective door 7 are now in the open state. At this time, the safety door 6 of the tong frame, the left protective door 5, and the right protective door 7 are all in the open state, and the drill bit can freely enter and exit the power tong.

[0023] Meanwhile, by changing the flow area of ​​the first speed control valve 2.1, the second speed control valve 2.2, the third speed control valve 2.3, and the fourth speed control valve 2.4 during use, the operating speed of the left cylinder 2 and the right cylinder 9 can be changed, so as to achieve the purpose of consistent and smooth operation of the left cylinder and the right cylinder without impact.

[0024] By changing the working position of the first reversing valve 3.1 and the second reversing valve 3.2, the air passage between the clamp frame safety door actuation cylinder 4 and the left cylinder 2 and the right cylinder 9 can be cut off. At this time, the left door 5 and / or the right door 7 can be manually opened or closed as needed.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double-opening safety gate for a power clamp, characterized in that, The safety protection door includes a left protection door (5) and a right protection door (7). A left fixing frame (1) and a right fixing frame (10) are respectively provided on the left and right sides of the opening of the power pliers. The left fixing frame (1) and the left protection door (5) are hinged together, and the right fixing frame (10) and the right protection door (7) are hinged together. The left protection door (5) is connected to a left cylinder (2), and the right protection door (7) is connected to a right cylinder (9). The left cylinder (2) and the right cylinder (9) are respectively used to drive the opening and closing of the left protection door (5) and the right protection door (7).

2. A double-opening safety door for a power clamp as described in claim 1, characterized in that: The inner side of the safety protection door is also provided with a clamp frame safety door (6). The clamp frame safety door (6) and the left fixed frame (1) are hinged together. The clamp frame safety door (6) is connected with a clamp frame safety door actuation cylinder (4). The clamp frame safety door (6) is opened and closed under the action of the clamp frame safety door actuation cylinder (4). The clamp frame safety door (6) and the left fixed frame (1) are fixedly connected.

3. A double-opening safety door for a power clamp as described in claim 2, characterized in that: One end of the left cylinder (2) is fixed to the left fixed frame (1) by the left hinge pin (3), and the other end is hinged to the left protective door (5). The left protective door (5) swings around the left hinge pin (3) under the drive of the left cylinder (2). One end of the right cylinder (9) is fixed to the right fixed frame (10) by the right hinge pin (8), and the other end is hinged to the right protective door (7). The right protective door (7) swings around the right hinge pin (8) under the drive of the right cylinder (9).

4. A double-opening safety door for a power clamp as described in claim 1, characterized in that: It also includes a first reversing valve (3.1) and a second reversing valve (3.2). The first reversing valve (3.1) is provided on the input circuit of the right cylinder (9) and the left cylinder (2), and the second reversing valve (3.2) is provided on the output circuit of the right cylinder (9) and the left cylinder (2).

5. A double-opening safety door for a power clamp as described in claim 1, characterized in that: The input circuit of the left cylinder (2) is equipped with a first speed control valve (2.1), the input circuit of the right cylinder (9) is equipped with a second speed control valve (2.2), the output circuit of the left cylinder (2) is equipped with a third speed control valve (2.3), and the output circuit of the right cylinder (9) is equipped with a fourth speed control valve (2.4).

6. A double-opening safety door for a power clamp as described in claim 2, characterized in that: The input circuit input ports of the right cylinder (9) and the left cylinder (2) are air line A ports, and the output circuit output ports of the right cylinder (9) and the left cylinder (2) are air line B ports.

7. A double-opening safety door for a power clamp as described in claim 6, characterized in that: The air line A port is also connected to the input port of the clamp frame safety door actuation cylinder (4) via an air line, and the output port of the clamp frame safety door actuation cylinder (4) is connected to the air line B port via an air line.

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