Pipe wrench assembly and iron roughneck device

Abstract

The utility model discloses a pipe wrench assembly and an iron roughneck device, and relates to the technical field of iron roughneck devices, the pipe wrench assembly comprises a fixing frame, a fixed rotating wrench assembly, a movable rotating wrench assembly, a rotating wrench separating and combining mechanism and a power mechanism, the fixed rotating wrench assembly is fixedly installed on the fixing frame; the moving rotary clamp assembly is arranged on the fixing frame in a manner of moving up and down; the rotating clamp power assembly is in transmission connection with the fixed rotating clamp assembly and the moving rotating clamp assembly and used for driving the fixed rotating clamp assembly and the moving rotating clamp assembly to conduct screwing-on and screwing-off operation. The rotating clamp separating and combining mechanism is used for driving the fixed rotating clamp assembly and the moving rotating clamp assembly to be horizontally separated. The power mechanism is in transmission connection with the moving rotary clamp assembly and used for driving the moving rotary clamp assembly to move up and down. According to the technical scheme provided by the utility model, the structure can be simplified, the cost is reduced, and the reliability and applicability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to iron driller device technical field, especially a pipe wrench subassembly and the iron driller device of adopting this pipe wrench subassembly. BACKGROUND

[0002] In the oil, natural gas and other drilling industry, the impact wrench assembly is one of the key components of the iron driller device, mainly used for the connection and disassembly of the drill pipe, that is, to realize the make-up (tighten) and break-out (loosen) operation of the drill pipe. The traditional impact wrench assembly design usually includes two independent rotary wrench assemblies, which change the up-down position to realize the make-up and break-out operation.

[0003] Specifically, in the traditional market impact wrench assembly, two rotary wrench assemblies are independently installed and driven by two independent power assemblies. The two power assemblies usually include motor, reducer, transmission shaft and other components, which are used to drive the two rotary wrench assemblies to move up and down in the vertical direction respectively. When making-up, one rotary wrench assembly rises and clamps the drill pipe under the drive of the power assembly, and then realizes the tight connection through the rotary action; while when break-out, the other rotary wrench assembly performs similar operation under the drive of the other power assembly, but in the opposite direction, to realize the loosening of the drill pipe.

[0004] However, this traditional design has obvious shortcomings. Since two independent power assemblies are used to drive the two rotary wrench assemblies respectively, the structure of the entire impact wrench assembly is relatively complex, increasing the manufacturing cost and maintenance difficulty. Secondly, in the scene where a larger break-out torque is required, the two power assemblies work simultaneously, which not only consumes more energy, but also increases the risk of system failure. Once one of the power assemblies fails, it will directly affect the normal work of the impact wrench assembly, and even may cause the shutdown of the entire iron driller device.

[0005] In view of the above problems, it is necessary to improve and optimize the existing impact wrench assembly to simplify the structure, reduce the cost, improve the reliability and applicability. SUMMARY

[0006] The utility model provides a pipe wrench subassembly and iron driller device, aiming at improving and optimizing the impact wrench to simplify the structure, reduce the cost, improve the reliability and applicability.

[0007] In order to achieve the above object, the utility model discloses a pipe tongs subassembly, including fixed frame, fixed rotary tongs subassembly, movable rotary tongs subassembly, rotary tongs power pack, rotary tongs open-close mechanism and power mechanism, the fixed rotary tongs subassembly is fixedly installed in the fixed frame is used for clamping drilling tool, the movable rotary tongs subassembly can be up and down mobile setting in the fixed frame is used for clamping drilling tool, the rotary tongs power pack with the fixed rotary tongs subassembly, the movable rotary tongs subassembly are all transmission connection, is used for driving the fixed rotary tongs subassembly and the movable rotary tongs subassembly carries out the operation of the upper buckle and the impact buckle, the rotary tongs open-close mechanism is used for driving the fixed rotary tongs subassembly and the movable rotary tongs subassembly horizontal separation, the power mechanism with the movable rotary tongs subassembly transmission connection is used for driving the movable rotary tongs subassembly up and down mobile.

[0008] In an embodiment, the fixed rotary tongs subassembly and the movable rotary tongs subassembly all include clamping oil cylinder, movable tongs body and fixed tongs body, and the movable tongs body is driven to clamp the drilling tool through the clamping oil cylinder.

[0009] In an embodiment, the power mechanism is hydraulic drive or electric drive, and the movable rotary tongs subassembly is driven to move up and down through the rotating screw rod.

[0010] In an embodiment, the position of the fixed rotary tongs subassembly is between the intermediate position of the movable rotary tongs subassembly moving up the farthest position and moving down the farthest position.

[0011] In an embodiment, the pipe tongs subassembly further includes a detection switch installed on the fixed frame, and the detection switch is used for monitoring the in-place state of the movable rotary tongs subassembly.

[0012] In an embodiment, the detection switch includes a first detection switch and a second detection switch, the first detection switch is used for detecting the up-moving position of the movable rotary tongs subassembly, the second detection switch is used for detecting the down-moving position of the movable rotary tongs subassembly, and the power mechanism is controlled to stop working.

[0013] In an embodiment, the rotary tongs open-close mechanism includes a first oil cylinder, a second oil cylinder, a first connecting rod mechanism and a second connecting rod mechanism, the first oil cylinder is in transmission connection with the first connecting rod mechanism, the first connecting rod mechanism is in transmission connection with the fixed rotary tongs subassembly, the second oil cylinder is in transmission connection with the second connecting rod mechanism, and the second connecting rod mechanism is in transmission connection with the movable rotary tongs subassembly.

[0014] In an embodiment, the rotary tongs power pack includes a fixed tongs pin shaft, a movable tongs pin shaft and a rotary tongs power oil cylinder connected with each other, and the fixed rotary tongs subassembly and the movable rotary tongs subassembly are rotated through the rotary tongs power oil cylinder to clamp and loosen the drilling tool.

[0015] In an embodiment, the fixed rotary tongs assembly and the movable rotary tongs assembly are interchangeably arranged.

[0016] The utility model discloses still provide a pipe tongs assembly, which comprises a fixed rotary tongs assembly and a movable rotary tongs assembly.

[0017] The utility model discloses the technical scheme through adopting the fixed rotary tongs assembly of unchangeable height and the movable rotary tongs assembly that can move up and down, and the movable rotary tongs assembly is moved up and down by a power mechanism, to change the up and down position of movable rotary tongs assembly, thereby change the up and down position of fixed rotary tongs assembly and movable rotary tongs assembly, thereby realize the operation of upper and lower buckling and punching. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the pipe tongs assembly provided by the utility model;

[0020] Figure 2 It is a structural schematic diagram of a view angle of part of structure of an embodiment of the pipe tongs assembly provided by the utility model;

[0021] Figure 3 It is a structural schematic diagram of another view angle of part of structure of an embodiment of the pipe tongs assembly provided by the utility model;

[0022] Figure 4 It is a structural schematic diagram of still another view angle of part of structure of an embodiment of the pipe tongs assembly provided by the utility model.

[0023] EXPLANATION OF DRAWINGS:

[0024] 1, fixed rotating tongs assembly; 11, first clamping oil cylinder; 12, first movable tongs body; 13, first fixed tongs body; 2, movable rotating tongs assembly; 21, second clamping oil cylinder; 22, second movable tongs body; 23, second fixed tongs body; 24, power mechanism; 25, rotating screw; 3, rotating tongs power assembly; 31, fixed tongs pin shaft; 32, movable tongs pin shaft; 33, rotating tongs power oil cylinder; 4, rotating tongs opening and closing mechanism; 41, first oil cylinder; 42, second oil cylinder; 43, first connecting rod mechanism; 44, second connecting rod mechanism; 5, fixed frame; 51, first detection switch; 52, second detection switch.

[0025] The realization, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, taking "A and / or B" as an example, including A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0029] The utility model provides a kind of pipe tongs assembly, it is used in iron drill worker device.

[0030] Please refer toFigure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in the drawings, in an embodiment of the utility model, the pipe wrench assembly comprises a fixing frame 5, a fixed rotary wrench assembly 1, a movable rotary wrench assembly 2, a rotary wrench power assembly 3, a rotary wrench separating and combining mechanism 4 and a power mechanism 24. The fixed rotary wrench assembly 1 is fixedly installed on the fixing frame 5 and is used for clamping a drilling tool. The movable rotary wrench assembly 2 is movably arranged on the fixing frame 5 and is used for clamping a drilling tool. The rotary wrench power assembly 3 is in transmission connection with the fixed rotary wrench assembly 1 and the movable rotary wrench assembly 2. The rotary wrench power assembly 3 is used for driving the fixed rotary wrench assembly 1 and the movable rotary wrench assembly 2 to perform the make-up and impact make-up operations. The rotary wrench separating and combining mechanism 4 is used for driving the fixed rotary wrench assembly 1 and the movable rotary wrench assembly 2 to horizontally separate. The power mechanism 24 is in transmission connection with the movable rotary wrench assembly 2 and is used for driving the movable rotary wrench assembly 2 to move up and down.

[0031] Specifically, the pipe tong assembly of the present application comprises a fixed frame 5, a fixed rotary tong assembly 1, a movable rotary tong assembly 2, a rotary tong separating and combining mechanism 4, a rotary tong power assembly 3 and a power mechanism 24 which are assembled with each other. The fixed frame 5 serves as the frame of the pipe tong assembly, which provides space and position for mounting various components. The fixed rotary tong assembly 1 and the movable rotary tong assembly 2 are arranged opposite to each other, the fixed rotary tong assembly 1 is mounted on the fixed frame 5, and the height of the fixed rotary tong assembly 1 on the fixed frame 5 is constant. The fixed rotary tong assembly 1 and the movable rotary tong assembly 2 are both used for clamping and unclamping drilling tools. The drilling tools include two pipe column components, and the pipe tong assembly of the present application is used for assembling and disassembling the two pipe column components. It should be noted that the fixed rotary tong assembly 1 is fixedly mounted on the fixed frame 5 in the present embodiment, which does not mean that the fixed rotary tong assembly 1 is not movable, but only means that the position of the fixed rotary tong assembly 1 in the vertical direction of the fixed frame 5 is constant, and the fixed rotary tong assembly 1 can be clamped and unclamped. The movable rotary tong assembly 2 is movably mounted on the fixed frame 5, and the movable rotary tong assembly 2 can move in the vertical direction (in the height direction) of the fixed frame 5 to move above the fixed rotary tong assembly 1 and below the fixed rotary tong assembly 1, so as to perform the make-up and break-out operations respectively. In the present embodiment, the directions of rotation of the fixed rotary tong assembly 1 and the movable rotary tong assembly 2 remain unchanged during the make-up and break-out processes, and only the movable rotary tong assembly 2 needs to be moved up and down, so as to change the pipe column components clamped by the fixed rotary tong assembly 1 and the movable rotary tong assembly 2. For example, when the movable rotary tong assembly 2 is located above the fixed rotary tong assembly 1, the make-up operation can be performed, and at this time the movable rotary tong assembly 2 clamps the drilling tools above, and the fixed rotary tong assembly 1 clamps the drilling tools below; when the movable rotary tong assembly 2 is located below the fixed rotary tong assembly 1, the break-out operation can be performed, and at this time the movable rotary tong assembly 2 clamps the drilling tools below, and the fixed rotary tong assembly 1 clamps the drilling tools above. It can be understood that the positions of the movable rotary tong assembly 2 and the fixed rotary tong assembly 1 during the make-up and break-out operations can also be opposite to the above examples. The rotary tong power assembly 3 is in transmission connection with the fixed rotary tong assembly 1 and the movable rotary tong assembly 2 respectively, so as to provide power for the two assemblies, and then perform the make-up and break-out operations.

[0032] The rotary tong separating and combining mechanism 4 is in transmission connection with the fixed rotary tong assembly 1 and the movable rotary tong assembly 2, and is used for driving the fixed rotary tong assembly 1 and the movable rotary tong assembly 2 to be horizontally separated. It should be noted that when it is necessary to replace the make-up and break-out operations, the movable rotary tong assembly 2 and the fixed rotary tong assembly 1 need to be first horizontally separated, so as to provide space for the movable rotary tong assembly 2 to move in the vertical direction, so as to avoid interference between the movable rotary tong assembly 2 and the fixed rotary tong assembly 1 when the movable rotary tong assembly 2 moves up and down. The power mechanism 24 is in transmission connection with the movable rotary tong assembly 2, and provides power for the movable rotary tong assembly 2 to move up and down.

[0033] The technical scheme of the utility model discloses through adopting the fixed rotating pincers assembly 1 of the height on the fixed frame 5 unchangeable and the movable rotating pincers assembly 2 that can move up and down, the movable rotating pincers assembly 2 is moved up and down by a power mechanism 24, to change the up and down position of movable rotating pincers assembly 2, change the drill tool of fixed rotating pincers assembly 1 and movable rotating pincers assembly 2 clamping, to realize the operation of upper and lower buckling, such design can not only simplify the structure, reduce the cost, but also can improve the reliability and applicability of equipment.

[0034] In an optional embodiment, the fixed rotating pincers assembly 1 and the movable rotating pincers assembly 2 each include a clamping oil cylinder (11, 12), a movable jaw body (12, 22), and a fixed jaw body (13, 23), and the movable jaw body is driven to clamp the drill tool by the clamping oil cylinder.

[0035] Specifically, the fixed rotating pincers assembly 1 and the movable rotating pincers assembly 2 have similar structures and basically the same working principles. The fixed rotating pincers assembly 1 includes a first fixed jaw body 13, a first movable jaw body 12, and a first clamping oil cylinder 11; and the movable rotating pincers assembly 2 includes a second fixed jaw body 23, a second movable jaw body 22, and a second clamping oil cylinder 21. The clamping oil cylinder is the power source of the fixed rotating pincers assembly 1 and the movable rotating pincers assembly 2, and drives the movable jaw body to move through hydraulic action. The movable jaw body and the fixed jaw body jointly form a clamping space, and clamp and release the drill tool through hydraulic action. One end of the movable jaw body is rotatably arranged relative to the fixed jaw body, and the clamping oil cylinder is in transmission connection with the movable jaw body to provide rotary power for the movable jaw body to drive the movable jaw body to rotate, thereby realizing the clamping and releasing operation.

[0036] In an optional embodiment, the fixed rotating pincers assembly 1 and the movable rotating pincers assembly 2 can be interchangeably arranged. Specifically, in some application scenarios, it may be necessary to change the relative positions of the fixed rotating pincers assembly 1 and the movable rotating pincers assembly 2 to adapt to specific clamping or releasing requirements. After interchanging the positions, the functions of the two assemblies will not change, but their operation sequence or mode may be adjusted according to the new layout.

[0037] In an optional embodiment, the power mechanism 24 is hydraulically driven or electrically driven, and the movable rotating pincers assembly 2 is moved up and down by a rotating screw rod 25.

[0038] Specifically, the power mechanism 24 is a key component of the pipe tong assembly of the present application, which is responsible for providing power for the up-and-down movement of the traveling rotary tong assembly 2. According to the specific application scenario and requirements, the power mechanism 24 can adopt two ways of hydraulic drive or electric drive. The hydraulic drive method has the advantages of stable power and control precision; the electric drive method has the advantages of simple structure and convenient maintenance. Regardless of which driving method is adopted, the rotary screw 25 is a key component for realizing the up-and-down movement of the traveling rotary tong assembly 2, which converts rotary motion into linear motion to drive the traveling rotary tong assembly 2 to move up and down. The design of the rotary screw 25 usually has high precision and high stiffness, which can ensure the stability and accuracy of the traveling rotary tong assembly 2 during up-and-down movement.

[0039] In an optional embodiment, the position of the fixed rotary tong assembly 1 is at the middle position between the farthest up-moving position and the farthest down-moving position of the traveling rotary tong assembly 2.

[0040] Specifically, in drilling operations, the fixed rotary tong assembly 1 and the traveling rotary tong assembly 2 usually work together to complete the clamping and rotating operations of the upper and lower drilling tools. The present application sets the fixed rotary tong assembly 1 at the middle position between the farthest up-moving position and the farthest down-moving position of the traveling rotary tong assembly 2, which can shorten the time of up-and-down movement of the traveling rotary tong assembly 2, thereby improving the drilling efficiency. This is particularly important for drilling operations that require frequent replacement of drilling tools or other operations. At the same time, the fixed rotary tong assembly 1 located at the middle position helps to reduce the vibration and shaking of the drilling tools, thereby reducing the risk of safety accidents caused by equipment failure or improper operation.

[0041] In an optional embodiment, the pipe tong assembly further comprises a detection switch installed on the fixed frame 5, which is used to monitor the in-place state of the traveling rotary tong assembly 2. The detection switch includes a first detection switch 51 and a second detection switch 52. The first detection switch 51 is used to detect the up-moving position of the traveling rotary tong assembly 2, and the second detection switch 52 is used to detect the down-moving position of the traveling rotary tong assembly 2 and control the power mechanism 24 to stop working.

[0042] Specifically, the application controls the up and down position of the floating rotary tong assembly to ensure stable operation of the equipment and avoid accidental damage to key components. The application provides a feedback signal to the control system by setting a detection switch, thereby controlling the action of the power mechanism 24 to prevent the rotary tong assembly from moving too much or colliding. The detection switch includes a first detection switch 51 and a second detection switch 52. Both the first detection switch 51 and the second detection switch 52 are installed on the fixed frame 5. When the floating rotary tong assembly 2 moves up to the preset position, the first detection switch 51 is triggered, which sends a signal to the control system indicating that the floating rotary tong assembly 2 has reached the upper limit position, and the control system controls the power mechanism 24 to stop the upward movement according to the signal, preventing the floating tong assembly from moving too much. Similarly, when the floating rotary tong assembly 2 moves down to the preset position, the second detection switch 52 is triggered.

[0043] In an optional embodiment, the rotary tong opening and closing mechanism 4 includes a first oil cylinder 41, a second oil cylinder 42, a first linkage mechanism 43, and a second linkage mechanism 44. The first oil cylinder 41 is in transmission connection with the first linkage mechanism 43, and the first linkage mechanism 43 is in transmission connection with the fixed rotary tong assembly 1. The second oil cylinder 42 is in transmission connection with the second linkage mechanism 44, and the second linkage mechanism 44 is in transmission connection with the floating rotary tong assembly 2.

[0044] Specifically, the rotary tong opening and closing mechanism 4 is installed on the fixed frame 5, which drives the fixed rotary tong assembly 1 and the floating rotary tong assembly 2 to move through the linkage mechanism. These actions include opening and closing forms to separate and fold the fixed rotary tong assembly 1 and the floating rotary tong assembly 2 in the horizontal direction. The rotary tong opening and closing mechanism 4 includes a first oil cylinder 41, a second oil cylinder 42, a first linkage mechanism 43, and a second linkage mechanism 44. The first oil cylinder 41 drives the first linkage mechanism 43 to move, and the second oil cylinder 42 drives the second linkage mechanism 44 to move. The application can achieve fast and accurate action control through the cooperation of hydraulic drive and linkage mechanism.

[0045] In an optional embodiment, the rotary tong power assembly 3 includes a fixed tong pin shaft 31, a floating tong pin shaft 32, and a rotary tong power oil cylinder 33 connected together; the rotary tong power oil cylinder 33 pushes the fixed rotary tong assembly 1 and the floating rotary tong assembly 2 to rotate to achieve clamping and loosening of the drilling tools.

[0046] Specifically, the rotating tong power assembly 3 is the key part of the pipe tong assembly of the present application, which realizes the clamping and unclamping of the drilling tool (i.e. the make-up and break-out operation) through the cooperation of a series of assemblies. In the initial state, the fixed rotating tong assembly 1 and the traveling rotating tong assembly 2 are in the unclamping state, and the drilling tool (pipe string) can be freely put in or taken out. When it is necessary to clamp the drilling tool, the rotating tong power cylinder 33 performs the extension action to drive the upper assembly of the two to rotate around the corresponding pin shaft (the fixed tong pin shaft 31 at the back of the fixed rotating tong assembly 1 or the traveling tong pin shaft 32 at the back of the traveling rotating tong assembly 2), thereby realizing the make-up operation. When it is necessary to unclamp the drilling tool, the rotating tong power cylinder 33 is retracted to drive the upper assembly of the two to rotate in the opposite direction around the corresponding pin shaft, thereby unclamping the drilling tool to perform the break-out operation.

[0047] The different action processes of the pipe tong assembly of the present application are described below.

[0048] The clamping and unclamping action process is as follows:

[0049] The first clamping cylinder 11 of the fixed rotating tong assembly 1 is retracted to drive the first movable tong body 12 and the first fixed tong body 13 of the fixed rotating tong assembly 1 to act to clamp the pipe string at a calculated position. The second clamping cylinder 21 inside the traveling rotating tong assembly 2 is retracted to drive the second movable tong body 22 and the second fixed tong body 23 of the traveling rotating tong assembly 2 to act to clamp another pipe string at the same axial position as the fixed rotating tong assembly 1.

[0050] The make-up and break-out action process is as follows:

[0051] After clamping the upper and lower pipe strings, the rotating tong power mechanism 24 is actuated by the extension action of the rotating tong power cylinder 33 connected between the fixed tong pin shaft 31 at the back of the fixed rotating tong assembly 1 and the traveling tong pin shaft 32 at the back of the traveling rotating tong assembly 2 to push the rotating tongs at the relatively higher position to rotate, and only the rotating tongs at the relatively higher position will rotate around the pipe string during the process. During the action of the rotating tong power cylinder 33, the first cylinder 41 of the rotating tong switching mechanism 4 connected between the fixed frame 5 and the fixed rotating tong, and the second cylinder 42 of the rotating tong switching mechanism 4 connected between the fixed frame 5 and the traveling rotating tong assembly 2 are in the floating state.

[0052] The rotating tong switching action process is as follows:

[0053] The fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 are arranged in up-down mode when working or on standby, and the tongs jaw parts are arranged in left-right symmetry, when the rotary tongs opening and closing action is needed, the rotary tongs power oil cylinder 33 is kept in the retracted state, the first oil cylinder 41 of the rotary tongs opening and closing mechanism 4 and the second oil cylinder 42 of the rotary tongs opening and closing mechanism 4 are extended, the first connecting rod mechanism 43 and the second connecting rod mechanism 44 of the rotary tongs opening and closing mechanism 4 are driven to act, and then the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 are driven to rotate outward around the fixed tongs pin shaft 31 and the movable tongs pin shaft 32 respectively, so that the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 are separated in the horizontal direction.

[0054] The position switching action process of the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 is as follows:

[0055] After the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 are separated in the horizontal direction through the separation action, the rotary screw 25 is rotated through the rotation of the power mechanism 24 at the top of the movable rotary tongs assembly 2, and then the second movable tongs body 22 and the second fixed tongs body 23 in the movable rotary tongs assembly 2 and the up-down movement of the second clamping oil cylinder 21 are driven. Whether the movable rotary tongs assembly 2 is moved to the position or not is detected through the first detection switch 51 and the second detection switch 52 installed on the fixed frame 5, and a command of whether to stop the action is given, so that the up-down position switching of the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 is finally realized, and the make-up and impact make-up functions of the drilling tools are finally realized.

[0056] The utility model also proposes a kind of iron driller device, the iron driller device includes above-mentioned pipe tongs assembly, and the specific structure of the pipe tongs assembly refers to above-mentioned embodiment, since iron driller device has adopted all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical solutions of above-mentioned embodiments, here is not repeated.

[0057] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure transformation using the utility model specification and drawing contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A pipe tong assembly for a iron roughneck device, characterized by, The pipe tong assembly comprises: a fixed frame, a fixed rotary tong assembly fixedly installed on the fixed frame for clamping a drilling tool; a movable rotary tong assembly movably arranged on the fixed frame for clamping a drilling tool; a rotary tong power assembly in transmission connection with the fixed rotary tong assembly and the movable rotary tong assembly for driving the fixed rotary tong assembly and the movable rotary tong assembly to perform make-up and impact make-up operations; a rotary tong separating and combining mechanism for driving the fixed rotary tong assembly and the movable rotary tong assembly to horizontally separate; a power mechanism in transmission connection with the movable rotary tong assembly for driving the movable rotary tong assembly to move up and down.

2. The tube tongs assembly of claim 1, wherein, The fixed rotary tong assembly and the movable rotary tong assembly each comprise a clamping oil cylinder, a movable tong body and a fixed tong body, and the movable tong body is driven by the clamping oil cylinder to clamp a drilling tool.

3. The tube tongs assembly of claim 1, wherein, The power mechanism is hydraulically driven or electrically driven, and the movable rotary tong assembly is driven by a rotary screw rod to move up and down.

4. The tube tongs assembly of claim 1, wherein, The position of the fixed rotary tong assembly is in the middle position between the farthest upward position and the farthest downward position of the movable rotary tong assembly.

5. The tube tongs assembly of claim 1, wherein, The pipe tong assembly further comprises detection switches installed on the fixed frame, and the detection switches are used for monitoring the in-place state of the movable rotary tong assembly.

6. The tube tongs assembly of claim 5, wherein, The detection switches comprise a first detection switch and a second detection switch, the first detection switch is used for detecting the upward position of the movable rotary tong assembly, and the second detection switch is used for detecting the downward position of the movable rotary tong assembly and controlling the power mechanism to stop working.

7. The tube tongs assembly of claim 1, wherein, The rotary tong separating and combining mechanism comprises a first oil cylinder, a second oil cylinder, a first linkage mechanism and a second linkage mechanism, the first oil cylinder is in transmission connection with the first linkage mechanism, the first linkage mechanism is in transmission connection with the fixed rotary tong assembly, the second oil cylinder is in transmission connection with the second linkage mechanism, and the second linkage mechanism is in transmission connection with the movable rotary tong assembly.

8. The tube tongs assembly of claim 1, wherein, The rotary tong power assembly comprises a fixed tong pin shaft, a movable tong pin shaft and a rotary tong power oil cylinder connected with each other, and the fixed rotary tong assembly and the movable rotary tong assembly are rotated by the rotary tong power oil cylinder to clamp and unclamp a drilling tool.

9. The tube tongs assembly of claim 2, wherein, The fixed rotary tong assembly and the movable rotary tong assembly are arranged in an interchangeable position.

10. An Iron Dog device characterized by, The pipe tong assembly comprises the pipe tong assembly according to any one of claims 1 to 9.

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