Pipe wrench assembly and iron roughneck device

Abstract

The invention 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, and 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, the structure can be simplified, the cost is reduced, and the reliability and applicability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of iron roughneck devices, and in particular to a pipe clamp assembly and an iron roughneck device using the pipe clamp assembly. Background Art

[0002] In the oil and gas drilling industry, the punch clamp assembly is one of the key components of the iron roughneck, which is mainly used for the connection and removal of the drill pipe, that is, to achieve the make-up (tightening) and punching (loosening) operations of the drill pipe. The traditional punch clamp assembly design usually includes two independent rotating clamp assemblies, which achieve the make-up and punching operations by changing the upper and lower positions.

[0003] Specifically, in the punching and buckling pliers assembly on the traditional market, the two rotating pliers assemblies are installed independently and driven by two independent power assemblies. The two power assemblies usually include motors, reducers, transmission shafts and other components, which are used to drive the two rotating pliers assemblies to move up and down in the vertical direction. When performing the buckling operation, one rotating pliers assembly rises and clamps the drill pipe under the drive of the power assembly, and then achieves the buckling through the rotation action; when performing the punching and buckling operation, the other rotating pliers assembly performs a similar operation under the drive of another power assembly, but in the opposite direction to achieve 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 rotating clamp assemblies respectively, the structure of the entire punch clamp assembly is relatively complex, which increases the manufacturing cost and maintenance difficulty. Secondly, in the scenario where a large punch torque is required, the two power assemblies work at the same time, which not only consumes a lot of energy, but also increases the risk of system failure. Once one of the power assemblies fails, it will directly affect the normal operation of the punch clamp assembly and may even cause the entire iron roughneck to shut down.

[0005] In view of the above problems, it is necessary to improve and optimize the existing punching and buckling pliers assembly to simplify the structure, reduce costs, and improve reliability and applicability. Summary of the invention

[0006] The present invention provides a pipe clamp assembly and an iron roughneck device, aiming to improve and optimize the punch clamp so as to simplify the structure, reduce the cost, and improve the reliability and applicability.

[0007] To achieve the above-mentioned purpose, the pipe clamp assembly proposed in the present invention comprises a fixed frame, a fixed rotary clamp assembly, a movable rotary clamp assembly, a rotary clamp power assembly, a rotary clamp separation and combination mechanism and a power mechanism; the fixed rotary clamp assembly is fixedly installed on the fixed frame for clamping the drilling tool; the movable rotary clamp assembly can be moved up and down on the fixed frame for clamping the drilling tool; the rotary clamp power assembly is transmission-connected with the fixed rotary clamp assembly and the movable rotary clamp assembly for driving the fixed rotary clamp assembly and the movable rotary clamp assembly to perform buckling and punching operations; the rotary clamp separation and combination mechanism is used to drive the fixed rotary clamp assembly and the movable rotary clamp assembly to separate horizontally; the power mechanism is transmission-connected with the movable rotary clamp assembly for driving the movable rotary clamp assembly to move up and down.

[0008] In one embodiment, the fixed rotary tong assembly and the movable rotary tong assembly both include 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 the drilling tool.

[0009] In one embodiment, the power mechanism is hydraulically driven or electrically driven, and drives the movable rotary clamp assembly to move up and down by rotating the screw.

[0010] In one embodiment, the position of the fixed rotary tongs assembly is an intermediate position between the farthest upward position and the farthest downward position of the movable rotary tongs assembly.

[0011] In one embodiment, the pipe clamp assembly further comprises a detection switch mounted on a fixing frame, and the detection switch is used to monitor the in-place status of the movable rotating clamp assembly.

[0012] In one embodiment, the detection switch includes a first detection switch and a second detection switch, the first detection switch is used to detect the upward position of the movable rotating clamp assembly, and the second detection switch is used to detect the downward position of the movable rotating clamp assembly and control the power mechanism to stop action.

[0013] In one embodiment, the rotary pliers opening and closing 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 transmission connected to the first connecting rod mechanism, the first connecting rod mechanism is transmission connected to the fixed rotary pliers assembly; the second oil cylinder is transmission connected to the second connecting rod mechanism, the second connecting rod mechanism is transmission connected to the movable rotary pliers assembly.

[0014] In one embodiment, the rotary tongs power assembly includes a fixed tongs pin shaft, a movable tongs pin shaft, and a rotary tongs power cylinder connected to each other; the rotary tongs power cylinder drives the fixed rotary tongs assembly and the movable rotary tongs assembly to rotate to achieve clamping and loosening of the drilling tool.

[0015] In one embodiment, the fixed rotary tongs assembly and the movable rotary tongs assembly can be arranged in interchangeable positions.

[0016] The present invention also provides an iron roughneck device, which comprises the above-mentioned pipe clamp assembly.

[0017] The technical solution of the present invention adopts a fixed rotating clamp assembly with a constant height and a movable rotating clamp assembly that can move up and down, and drives the movable rotating clamp assembly to move up and down through a power mechanism to change the up and down position of the movable rotating clamp assembly, thereby changing the up and down positions of the fixed rotating clamp assembly and the movable rotating clamp assembly, thereby realizing the buckle-up and punch-down operations. Such a design can not only simplify the structure and reduce the cost, but also improve the reliability and applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a pipe clamp assembly provided by the present invention;

[0020] Figure 2 A structural schematic diagram of a portion of the structure of an embodiment of a pipe clamp assembly provided by the present invention from one perspective;

[0021] Figure 3 A structural schematic diagram of a portion of the structure of an embodiment of a pipe clamp assembly provided by the present invention from another perspective;

[0022] Figure 4 A structural schematic diagram of a portion of the structure of an embodiment of a pipe clamp assembly provided by the present invention from another perspective.

[0023] Description of Figure Numbers:

[0024] 1. Fixed rotating tongs assembly; 11. First clamping oil cylinder; 12. First movable tongs body; 13. First fixed tongs body; 2. Floating rotating tongs assembly; 21. Second clamping oil cylinder; 22. Second movable tongs body; 23. Second fixed tongs body; 24. Power mechanism; 25. Rotating screw rod; 3. Rotating tongs power assembly; 31. Fixed tongs pin shaft; 32. Floating tongs pin shaft; 33. Rotating tongs power cylinder; 4. Rotating tongs separation 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 of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention 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 status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The present invention provides a pipe clamp assembly, which is used in an iron roughneck device.

[0030] See also Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in one embodiment of the present invention, the pipe clamp assembly includes a fixed frame 5, a fixed rotary clamp assembly 1, a movable rotary clamp assembly 2, a rotary clamp power assembly 3, a rotary clamp separation and combination mechanism 4 and a power mechanism 24. The fixed rotary clamp assembly 1 is fixedly mounted on the fixed frame 5, and is used to clamp the drilling tool. The movable rotary clamp assembly 2 can be moved up and down and is arranged on the fixed frame 5, and is used to clamp the drilling tool. The rotary clamp power assembly 3 is transmission-connected with the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2. The rotary clamp power assembly 3 is used to drive the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 to perform buckling and punching operations. The rotary clamp separation and combination mechanism 4 is used to drive the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 to separate horizontally. The power mechanism 24 is transmission-connected with the movable rotary clamp assembly 2, and is used to drive the movable rotary clamp assembly 2 to move up and down.

[0031] Specifically, the pipe clamp assembly of the present application includes a fixed frame 5, a fixed rotary clamp assembly 1, a movable rotary clamp assembly 2, a rotary clamp separation and combination mechanism 4, a rotary clamp power assembly 3 and a power mechanism 24 that are assembled with each other. The fixed frame 5 serves as the frame of the pipe clamp assembly, which provides space and position for installing various components. The fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are arranged relatively to each other on the left and right, and the fixed rotary clamp assembly 1 is installed on the fixed frame 5, and the height of the fixed rotary clamp assembly 1 on the fixed frame 5 remains unchanged. The fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are both used to clamp and release the drilling tool. The drilling tool includes two upper and lower pipe column parts. The pipe clamp assembly of the present application is used to assemble the two pipe column parts together and disassemble the two pipe column parts. It should be noted that in this embodiment, the fixed rotary clamp assembly 1 is fixedly installed on the fixed frame 5, which does not mean that the fixed rotary clamp assembly 1 does not move, but only means that the position of the fixed rotary clamp assembly 1 in the upper and lower directions of the fixed frame 5 remains unchanged, and the fixed rotary clamp assembly 1 can perform clamping and loosening operations. The mobile rotary clamp assembly 2 is movably mounted on the fixed frame 5, and the mobile rotary clamp assembly 2 can move in the up-down direction (in the height direction) of the fixed frame 5 to move to the top of the fixed rotary clamp assembly 1, and to the bottom of the fixed rotary clamp assembly 1, so as to perform the make-up and punching operations respectively. In this embodiment, the fixed rotary clamp assembly 1 and the mobile rotary clamp assembly 2 keep the same direction of rotation during the make-up and punching processes, and only the mobile rotary clamp assembly 2 needs to be moved up and down to change the pipe column parts clamped by the fixed rotary clamp assembly 1 and the mobile rotary clamp assembly 2. For example, when the mobile rotary clamp assembly 2 is located above the fixed rotary clamp assembly 1, the make-up operation can be performed, at which time the mobile rotary clamp assembly 2 clamps the drill tool above, and the fixed rotary clamp assembly 1 clamps the drill tool below; when the mobile rotary clamp assembly 2 is located below the fixed rotary clamp assembly 1, the punching operation can be performed, at which time the mobile rotary clamp assembly 2 clamps the drill tool below, and the fixed rotary clamp assembly 1 clamps the drill tool above. It is understandable that the positions of the mobile rotary clamp assembly 2 and the fixed rotary clamp assembly 1 during make-up and punching can also be opposite to the above example. The rotary clamp power assembly 3 is respectively connected to the fixed rotary clamp assembly 1 and the mobile rotary clamp assembly 2 to provide power to both, thereby performing make-up and punching operations.

[0032] The rotary clamp separation and closing mechanism 4 is connected to the fixed rotary clamp assembly 1 and the floating rotary clamp assembly 2 in a transmission connection, and is used to drive the fixed rotary clamp assembly 1 and the floating rotary clamp assembly 2 to separate horizontally. It should be noted that when the buckle-up and buckle-punching operations need to be replaced, the floating rotary clamp assembly 2 and the fixed rotary clamp assembly 1 need to be separated horizontally first, so as to free up space for the floating rotary clamp assembly 2 to move in the vertical direction, so as to avoid interference between the floating rotary clamp assembly 2 and the fixed rotary clamp assembly 1 when the floating rotary clamp assembly 2 moves up and down. The power mechanism 24 is connected to the floating rotary clamp assembly 2 in a transmission connection, and the floating rotary clamp assembly 2 provides power for the floating rotary clamp assembly 2 to move up and down.

[0033] The technical solution of the present invention adopts a fixed rotating clamp assembly 1 whose height is fixed on a fixed frame 5, and a movable rotating clamp assembly 2 that can move up and down, and drives the movable rotating clamp assembly 2 to move up and down through a power mechanism 24 to change the up and down position of the movable rotating clamp assembly 2, and change the drill tool clamped by the fixed rotating clamp assembly 1 and the movable rotating clamp assembly 2, so as to realize the make-up and punching operations. Such a design can not only simplify the structure and reduce the cost, but also improve the reliability and applicability of the equipment.

[0034] In an optional embodiment, the fixed rotary tong assembly 1 and the movable rotary tong assembly 2 both include a clamping cylinder (11, 12), a movable tong body (12, 22) and a fixed tong body (13, 23), and the movable tong body is driven by the clamping cylinder to clamp the drilling tool.

[0035] Specifically, the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 have similar structures and basically the same working principles. The fixed rotary tongs assembly 1 includes a first fixed tongs body 13, a first movable tongs body 12 and a first clamping cylinder 11; the movable rotary tongs assembly 2 includes a second fixed tongs body 23, a second movable tongs body 22 and a second clamping cylinder 21. The clamping cylinder is the power source of the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2, and drives the movable tongs body to move through hydraulic action. The movable tongs body and the fixed tongs body together form a clamping space, and the drilling tool is clamped and released through hydraulic action. One end of the movable tongs body is rotatably arranged relative to the fixed tongs body, and the clamping cylinder is transmission-connected to the movable tongs body to provide rotational power for the movable tongs body, so as to drive the movable tongs body to rotate, thereby realizing the clamping and releasing operations.

[0036] In an optional embodiment, the fixed rotating tongs assembly 1 and the movable rotating tongs assembly 2 can be interchangeably arranged. Specifically, in certain application scenarios, the relative positions of the fixed rotating tongs assembly 1 and the movable rotating tongs assembly 2 may need to be changed to meet specific clamping or loosening requirements. After the interchange, the functions of the two components will not change, but their operation sequence or method may be adjusted according to the new layout.

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

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

[0039] In an optional embodiment, the position of the fixed rotating tongs assembly 1 is in the middle position between the farthest upward position and the farthest downward position of the movable rotating tongs assembly 2 .

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

[0041] In an optional embodiment, the pipe clamp assembly further includes a detection switch mounted on the fixing frame 5, and the detection switch is used to monitor the in-place status of the traveling rotary clamp 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 upward position of the traveling rotary clamp assembly 2, and the second detection switch 52 is used to detect the downward position of the traveling rotary clamp assembly 2, and control the power mechanism 24 to stop the action.

[0042] Specifically, the present application controls the upper and lower positions of the mobile rotary clamp assembly to ensure stable operation of the equipment and avoid accidental damage to key components. The present 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 excessive movement or collision of the rotary clamp assembly. The detection switch includes a first detection switch 51 and a second detection switch 52. The first detection switch 51 and the second detection switch 52 are both mounted on the fixed frame 5. When the mobile rotary clamp assembly 2 moves up to a preset position, the first detection switch 51 is triggered, and the switch sends a signal to the control system, indicating that the mobile rotary clamp assembly 2 has reached the upper limit position. The control system controls the power mechanism 24 to stop the upward movement according to this signal to prevent the mobile clamp assembly from excessively moving up. Similarly, when the mobile rotary clamp assembly 2 moves down to a preset position, the second detection switch 52 is triggered.

[0043] In an optional embodiment, the rotary clamp opening and closing mechanism 4 includes a first oil cylinder 41, a second oil cylinder 42, a first connecting rod mechanism 43 and a second connecting rod mechanism 44. The first oil cylinder 41 is transmission-connected to the first connecting rod mechanism 43, and the first connecting rod mechanism 43 is transmission-connected to the fixed rotary clamp assembly 1. The second oil cylinder 42 is transmission-connected to the second connecting rod mechanism 44, and the second connecting rod mechanism 44 is transmission-connected to the movable rotary clamp assembly 2.

[0044] Specifically, the rotary clamp separation and combination mechanism 4 is installed on the fixed frame 5, and it drives the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 to perform corresponding actions through the connecting rod mechanism. These actions include opening and closing, so that the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are separated and retracted in the horizontal direction. The rotary clamp separation and combination mechanism 4 includes a first oil cylinder 41, a second oil cylinder 42, a first connecting rod mechanism 43 and a second connecting rod mechanism 44. The first oil cylinder 41 drives the first connecting rod mechanism 43 to move, and the second oil cylinder 42 drives the second connecting rod mechanism 44 to move. The present application can achieve fast and accurate motion control through the cooperation of hydraulic drive and connecting rod mechanism.

[0045] In an optional embodiment, the rotary tongs power assembly 3 includes a fixed tongs pin shaft 31, a movable tongs pin shaft 32 and a rotary tongs power cylinder 33 connected to each other; the rotary tongs power cylinder 33 drives the fixed rotary tongs assembly 1 and the movable rotary tongs assembly 2 to rotate so as to clamp and release the drilling tool.

[0046] Specifically, the rotary clamp power assembly 3 is a key part of the pipe clamp assembly of the present application, which realizes the clamping and loosening of the drilling tool (i.e., the buckling and punching operations) through the coordinated work of a series of components. In the initial state, the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are in a loose state, and the drilling tool (pipe column member) can be freely put in or taken out. When it is necessary to clamp the drilling tool, the rotary clamp power cylinder 33 extends to drive the upper component of the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2, so that the upper component rotates around their respective pins (the fixed clamp pin 31 on the back of the fixed rotary clamp assembly 1 or the movable clamp pin 32 on the back of the movable rotary clamp assembly 2), thereby realizing the buckling operation. When it is necessary to loosen the drilling tool, the rotary clamp power cylinder 33 retracts to drive the upper component of the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 to rotate in the opposite direction around the corresponding pin, thereby loosening the drilling tool for the punching operation.

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

[0048] The clamping and releasing process is as follows:

[0049] The first clamping oil cylinder 11 of the fixed rotating tong assembly 1 retracts, driving the first movable tong body 12 and the first fixed tong body 13 of the fixed rotating tong assembly 1 to move, so as to clamp the pipe column at a certain calculated position. The second clamping oil cylinder 21 inside the traveling rotating tong assembly 2 retracts, driving the second movable tong body 22 and the second fixed tong body 23 of the traveling rotating tong assembly 2 to move, so as to clamp another pipe column at the same axial position as the fixed rotating tong assembly 1.

[0050] The process of buckling and punching is as follows:

[0051] After the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 clamp the upper and lower pipe column parts, the rotary clamp power mechanism 24 extends the rotary clamp power oil cylinder 33 between the fixed clamp pin shaft 31 connected to the back of the fixed rotary clamp assembly 1 and the movable clamp pin shaft 32 connected to the back of the movable rotary clamp assembly 2, pushing the rotary clamp at a relatively higher position to rotate, and in the process, only the rotary clamp at a relatively higher position will rotate around the pipe column part. During the operation of the rotary clamp power oil cylinder 33, the first oil cylinder 41 of the rotary clamp separation and combination mechanism 4 connected between the fixed frame 5 and the fixed rotary clamp, and the second oil cylinder 42 of the rotary clamp separation and combination mechanism 4 connected between the fixed frame 5 and the movable rotary clamp assembly 2 are in a floating state.

[0052] The process of opening and closing the rotary clamp is as follows:

[0053] The fixed rotating tongs assembly 1 and the movable rotating tongs assembly 2 are arranged up and down when working or on standby, and the jaws are arranged symmetrically on the left and right. When the rotating tongs need to be opened and closed, the rotating tongs power cylinder 33 is kept in a retracted state, and the first cylinder 41 of the rotating tongs opening and closing mechanism 4 and the second cylinder 42 of the rotating tongs opening and closing mechanism 4 are extended, thereby driving the first connecting rod mechanism 43 and the second connecting rod mechanism 44 of the rotating tongs opening and closing mechanism 4 to move, thereby driving the fixed rotating tongs assembly 1 and the movable rotating tongs assembly 2 to rotate outward around the fixed tongs pin shaft 31 and the movable tongs pin shaft 32 respectively, thereby realizing the separation of the fixed rotating tongs assembly 1 and the movable rotating tongs assembly 2 in the horizontal plane direction.

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

[0055] After the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are completely separated in the horizontal direction through the separation action, the rotary screw 25 is rotated by the rotation of the power mechanism 24 on the top of the movable rotary clamp assembly 2, thereby driving the second movable clamp body 22 and the second fixed clamp body 23 inside the movable rotary clamp assembly 2 and the second clamping oil cylinder 21 to move up and down. Whether the movable rotary clamp assembly 2 moves to the right position is determined by the first detection switch 51 and the second detection switch 52 installed on the fixed frame 5, and an instruction on whether to stop the action is given, and finally the upper and lower positions of the fixed rotary clamp assembly 1 and the movable rotary clamp assembly 2 are switched, and finally the buckle and punch functions of the drilling tool are realized.

[0056] The present invention also proposes an iron roughneck device, which includes the above-mentioned pipe clamp assembly. The specific structure of the pipe clamp assembly refers to the above-mentioned embodiment. Since the iron roughneck device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0057] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pipe clamp assembly for an iron roughneck, characterized in that: include: Fixed bracket, A fixed rotary clamp assembly, which is fixedly mounted on the fixed frame and is used to clamp the drilling tool; A movable rotary clamp assembly, which is movable up and down and arranged on the fixed frame, and is used for clamping the drilling tool; A rotary clamp power assembly, which is in transmission connection with the fixed rotary clamp assembly and the movable rotary clamp assembly, and is used to drive the fixed rotary clamp assembly and the movable rotary clamp assembly to perform make-up and punch-out operations; A rotary clamp separation and combination mechanism, the rotary clamp separation and combination mechanism is used to drive the fixed rotary clamp assembly and the movable rotary clamp assembly to separate horizontally; A power mechanism is transmission-connected with the movable rotary clamp assembly and is used for driving the movable rotary clamp assembly to move up and down.

2. The pipe clamp assembly according to claim 1, characterized in that: The fixed rotary tong assembly and the movable rotary tong assembly both 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 the drilling tool.

3. The pipe clamp assembly according to claim 1, characterized in that: The power mechanism is hydraulically driven or electrically driven, and drives the movable rotating clamp assembly to move up and down by rotating the screw rod.

4. The pipe clamp assembly according to claim 1, wherein: The position of the fixed rotating jaw assembly is an intermediate position between the farthest upward position and the farthest downward position of the movable rotating jaw assembly.

5. The pipe clamp assembly according to claim 1, wherein: The pipe clamp assembly also includes a detection switch installed on the fixing frame, and the detection switch is used to monitor the in-place status of the movable rotating clamp assembly.

6. The pipe clamp assembly according to claim 5, characterized in that: The detection switch includes a first detection switch and a second detection switch, wherein the first detection switch is used to detect the upward position of the movable rotating clamp assembly, and the second detection switch is used to detect the downward position of the movable rotating clamp assembly and control the power mechanism to stop the action.

7. The pipe clamp assembly according to claim 1, wherein: The rotary pliers opening and closing mechanism comprises a first oil cylinder, a second oil cylinder, a first connecting rod mechanism and a second connecting rod mechanism; the first oil cylinder is transmission connected to the first connecting rod mechanism, and the first connecting rod mechanism is transmission connected to the fixed rotary pliers assembly; the second oil cylinder is transmission connected to the second connecting rod mechanism, and the second connecting rod mechanism is transmission connected to the movable rotary pliers assembly.

8. The pipe clamp assembly according to claim 1, wherein: The rotary tongs power assembly comprises a fixed tongs pin shaft, a movable tongs pin shaft and a rotary tongs power cylinder which are connected to each other; the rotary tongs power cylinder drives the fixed rotary tongs assembly and the movable rotary tongs assembly to rotate so as to clamp and release the drilling tool.

9. The pipe clamp assembly according to claim 2, wherein: The fixed rotating clamp assembly and the movable rotating clamp assembly can be arranged in interchangeable positions.

10. An iron roughneck device, characterized in that: A pipe clamp assembly comprising any one of claims 1 to 9.

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