Iron roughneck clamp body floating device and iron roughneck clamp body device

Abstract

The invention discloses an iron roughneck clamp body floating device and an iron roughneck clamp body device, and relates to the technical field of iron roughneck, the iron roughneck clamp body floating device is provided with a first oil duct and a second oil duct, the end of the second oil duct is communicated with the first oil duct, the iron roughneck clamp body floating device comprises an oil supply assembly, a hydraulic mechanism, an energy accumulator and an on-off structure, the oil supply assembly comprises an oil supply tank and a switching structure, the oil supply tank communicates with one end of the first oil duct, the switching structure is arranged in the oil supply tank to switch the flow direction of the first oil duct, the hydraulic mechanism comprises an oil cylinder and a jacking structure, an inner cavity of the oil cylinder communicates with the other end of the first oil duct, and the jacking structure is slidably installed in the inner cavity of the oil cylinder in the first direction. Part of the jacking structure is exposed out of the oil cylinder, the jacking structure is used for being connected with the main clamp and driving the main clamp to move in the first direction, the energy accumulator communicates with the other end of the second oil duct, and the on-off structure is arranged on the second oil duct so as to switch on-off of the energy accumulator and the first oil duct. Through the arrangement, the clamping position of the clamping pincers can be actively adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of iron roughnecks, and in particular to an iron roughneck pliers body floating device and an iron roughneck pliers body device. Background Art

[0002] The iron roughneck is an important automated equipment in oil production engineering. During the process of making and breaking out the iron roughneck, the main clamp will move up and down as the drill pipe thread is screwed in and out. In order to prevent the weight of the main clamp from being fully applied to the drill pipe and damaging the drill pipe thread, a support device is needed to offset the weight of the main clamp and reduce the force on the drill pipe. The existing industry technical solutions all use springs and support rods to support the main clamp. Due to the large weight of the clamp body and the required spring strength and small compression, the clamp body stroke is small. When the drill pipe thread is long, the clamp needs to be loosened to reset the spring and then re-clamp, which reduces the work efficiency. In addition, the use of springs cannot actively adjust the clamping position of the clamp, which has limitations. Summary of the invention

[0003] The main purpose of the present invention is to provide an iron roughneck pliers body floating device and an iron roughneck pliers body device, aiming to solve the problem that the existing iron roughneck support device cannot actively adjust the clamping position of the clamping pliers.

[0004] To achieve the above object, the iron roughneck pliers body floating device proposed in the present invention has a first oil passage and a second oil passage, the end of the second oil passage is connected to the first oil passage, and the iron roughneck pliers body floating device includes:

[0005] An oil supply assembly, comprising an oil supply tank and a switching structure, wherein the oil supply tank is connected to one end of the first oil passage, and the switching structure is arranged in the oil supply tank to switch the flow direction of the hydraulic oil in the first oil passage;

[0006] A hydraulic mechanism comprises an oil cylinder and a lifting structure, wherein the inner cavity of the oil cylinder is connected to the other end of the first oil channel, the lifting structure is slidably installed in the inner cavity of the oil cylinder along a first direction and partially exposed from the oil cylinder, and the portion of the lifting structure exposed from the oil cylinder is used to connect to the main pliers and drive the main pliers to move along the first direction;

[0007] An accumulator is provided at the other end portion communicating with the second oil passage; and;

[0008] The on-off structure is provided on the second oil passage, and the on-off structure is used to switch the connection or disconnection between the accumulator and the first oil passage.

[0009] In one embodiment, the lifting structure comprises:

[0010] a sliding part, slidably mounted in the inner cavity of the oil cylinder along a first direction, and the sliding part and the oil cylinder are arranged in a movable seal along the first direction, the sliding part divides the inner cavity of the oil cylinder into a first cavity section and a second cavity section that are independent of each other, and the first cavity section is connected to the first oil passage; and

[0011] A transmission rod, one end of which is inserted into the second cavity section and connected to the sliding part, and the other end of which is used to drive the main pliers to move along the first direction.

[0012] In one embodiment, the iron roughneck pliers body floating device further has a third oil passage, the third oil passage is connected to the second chamber section and the oil supply tank, and the flow directions of the hydraulic oil in the third oil passage and the first oil passage are opposite.

[0013] In one embodiment, the switching structure includes a reversing valve, the reversing valve has at least two valve ports, and the two valve ports of the reversing valve are connected to the first oil passage and the second oil passage respectively.

[0014] In one embodiment, the hydraulic mechanism is arranged in plurality at intervals, wherein:

[0015] The first oil passage comprises a first branch and a plurality of second branches, one end of each of the plurality of second branches is connected to one end of the first branch, and the other end is respectively connected to a plurality of the first chamber sections, and the other end of the first branch is connected to the oil supply tank; and / or,

[0016] The third oil passage includes a third branch and multiple fourth branches, one end of each of the multiple fourth branches is connected to one end of the third branch, and the other end is respectively connected to multiple second cavity sections, and the other end of the third branch is connected to the oil supply tank.

[0017] In one embodiment, the iron roughneck pliers body floating device further includes a balancing valve, and the balancing valve is arranged on the first branch.

[0018] In one embodiment, the on-off structure includes an on-off valve, the on-off valve having a first valve port and a second valve port, the first valve port being connected to the first oil passage, the second valve port being connected to the accumulator, the on-off valve having a first state and a second state, the first valve port and the second valve port being connected in the first state, and the first valve port and the second valve port being disconnected in the second state;

[0019] The on-off valve can be switched between the first state and the second state.

[0020] In one embodiment, the lifting structure includes a sliding portion, the sliding portion is slidably installed in the inner cavity of the oil cylinder along a first direction, and the sliding portion and the oil cylinder are movably sealed along the first direction to separate the inner cavity of the oil cylinder into a first cavity section and a second cavity section that are independent of each other;

[0021] The iron roughneck pliers body floating device also has a third oil passage, one end of which is connected to the second cavity section, and the other end of which is connected to the oil supply tank;

[0022] The iron roughneck pliers body floating device also includes a stabilizing oil tank;

[0023] The on-off valve also includes a first drive port and a second drive port, wherein the first drive port is connected to the third oil passage, and the second drive port is connected to the stabilizing oil tank, so as to drive the on-off valve to switch between the first state and the second state through the pressure difference between the first drive port and the second drive port.

[0024] The present invention also provides an iron roughneck pliers device, comprising:

[0025] frame;

[0026] An iron roughneck pliers body floating device is arranged on the frame, and the iron roughneck pliers body floating device includes the above-mentioned iron roughneck pliers body floating device; and,

[0027] A main tong is connected to the jacking structure of the iron roughneck tongs body floating device to move along with the jacking structure in a first direction.

[0028] In one embodiment, a linear guide structure is further provided on the frame, and the linear guide structure is connected to the main pliers to limit the movement of the main pliers in the first direction.

[0029] In the technical solution of the present invention, when the main pliers need to move in the first direction, the switching structure is used to switch the flow direction of the hydraulic oil in the first oil channel, so that the hydraulic oil can flow from the oil supply tank to the oil cylinder, or from the oil cylinder to the oil supply tank, so as to change the content of the hydraulic oil in the oil cylinder, drive the lifting structure to move in the first direction, and then drive the main pliers to move in the first direction; and when the main pliers need to be clamped to perform make-up or make-out work, the accumulator is used to provide driving force for the lifting structure, and the accumulator releases or absorbs hydraulic oil as the main pliers are tightened and loosened, changes the content of the hydraulic oil in the oil cylinder, and adjusts the position of the lifting structure in the first direction, so that the main pliers complete the make-up or make-out work. With such a configuration, the clamping position of the clamping pliers can be actively adjusted to meet the working requirements of the main pliers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 A schematic structural diagram of an embodiment of an iron roughneck pliers body floating device provided by the present invention;

[0032] Figure 2 A schematic structural diagram of an embodiment of an iron roughneck pliers device provided by the present invention.

[0033] Description of Figure Numbers:

[0034] 1000, roughneck pliers device; 100, roughneck pliers floating device; 1, oil supply assembly; 11, oil supply tank; 12, switching structure; 121, reversing valve; 2, hydraulic mechanism; 21, oil cylinder; 211, first cavity section; 212, second cavity section; 22, lifting structure; 221, sliding part; 222, transmission rod; 3, accumulator; 4, on-off structure; 41, on-off valve; 411, first valve port; 412, second valve port; 413, first drive port; 414, second drive port; 5, balance valve; 6, stabilizing oil tank; 200, frame; 300, main pliers; 400, linear guide structure.

[0035] 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

[0036] 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 making creative work are within the scope of protection of the present invention.

[0037] 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.

[0038] 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.

[0039] The present invention provides an iron roughneck pliers body floating device, aiming to solve the problem that the existing iron roughneck support device cannot actively adjust the clamping position of the clamping pliers.

[0040] See also Figure 1 In one embodiment of the present invention, the iron roughneck pliers body floating device 100 has a first oil passage and a second oil passage, the end of the second oil passage is connected to the first oil passage, the iron roughneck pliers body floating device 100 includes an oil supply assembly 1, a hydraulic mechanism 2, an accumulator 3 and an on-off structure 4, the oil supply assembly 1 includes an oil supply tank 11 and a switching structure 12, the oil supply tank 11 is connected to one end of the first oil passage, the switching structure 12 is arranged in the oil supply tank 11, and is used to switch the flow direction of the hydraulic oil in the first oil passage, the hydraulic mechanism 2 includes an oil cylinder 21 and A lifting structure 22, wherein the inner cavity of the oil cylinder 21 is connected to the other end of the first oil passage, the lifting structure 22 is slidably installed in the inner cavity of the oil cylinder 21 along a first direction, and is partially exposed from the oil cylinder 21, and the portion of the lifting structure 22 exposed from the oil cylinder 21 is used to connect the main pliers 300 and drive the main pliers 300 to move along the first direction, the accumulator 3 is connected to the other end of the second oil passage, the on-off structure 4 is provided on the second oil passage, and the on-off structure 4 is used to switch the connection or disconnection between the accumulator 3 and the first oil passage.

[0041] In the technical solution of the present invention, when the main tongs 300 need to move in the first direction, the switching structure 12 is used to switch the flow direction of the hydraulic oil in the first oil channel, so that the hydraulic oil can flow from the oil supply tank 11 to the oil cylinder 21, or from the oil cylinder 21 to the oil supply tank 11, so as to change the content of the hydraulic oil in the oil cylinder 21, drive the lifting structure 22 to move in the first direction, and then drive the main tongs 300 to move in the first direction; and when the main tongs 300 need to be clamped to perform make-up or make-out work, the accumulator 3 is used to provide driving force for the lifting structure 22, and the accumulator 3 releases or absorbs hydraulic oil as the main tongs 300 are tightened and loosened, changes the content of the hydraulic oil in the oil cylinder 21, and adjusts the position of the lifting structure 22 in the first direction, so that the main tongs 300 complete the make-up or make-out work. With such a configuration, the clamping position of the clamping tongs can be actively adjusted to meet the working requirements of the main tongs 300.

[0042] It should be noted that the first direction may be any direction of up and down, front and back, or left and right, and the present invention does not limit this. The following description will be made by taking the first direction as up and down as an example.

[0043] Specifically, in one embodiment of the present invention, when it is necessary to drive the main pliers 300 to move upward, the switching structure 12 switches the flow direction of the hydraulic oil in the first oil channel, so that the hydraulic oil in the first oil channel flows from the oil supply tank 11 toward the oil cylinder 21, thereby filling the inner cavity of the oil cylinder 21, so that the oil pressure in the oil cylinder 21 is greater than the gravity of the lifting structure 22 and the main pliers 300, so as to drive the lifting structure 22 to move upward, thereby driving the main pliers 300 to move, and realizing the position adjustment of the main pliers 300. At this time, the on-off structure 4 connects the accumulator 3 and the first oil channel, and the hydraulic oil in the first oil channel can flow to the accumulator 3 through the second oil channel to charge the accumulator 3, so that the oil pressure in the accumulator 3 increases.

[0044] In another embodiment of the present invention, when it is necessary to drive the main pliers 300 to move downward, the switching structure 12 switches the flow direction of the hydraulic oil in the first oil channel, so that the hydraulic oil in the first oil channel flows from the oil cylinder 21 toward the oil supply tank 11, the hydraulic oil in the oil cylinder 21 is reduced, and the oil pressure in the oil cylinder 21 is less than the gravity of the jacking structure 22 and the main pliers 300. The jacking structure 22 can move downward, thereby driving the main pliers 300 to move downward, and realizing the position adjustment of the main pliers 300. At this time, the on-off structure 4 disconnects the accumulator 3 and the first oil channel to maintain the oil pressure in the accumulator 3 unchanged, and prevent the accumulator 3 from being filled with liquid during the descent of the jacking structure 22, so that the jacking structure 22 rebounds under the action of the accumulator 3 after the descent stops.

[0045] In another embodiment of the present invention, when the main tongs 300 need to be clamped for make-up work, the on-off structure 4 connects the accumulator 3 and the first oil channel, the main tongs 300 are clamped for make-up, the accumulator 3 absorbs the hydraulic oil discharged from the oil cylinder 21, the pressure of the hydraulic oil in the oil cylinder 21 drops to be lower than the gravity of the jacking structure 22 and the main tongs 300, the main tongs 300 are lowered to perform the tightening work, after the tightening is completed, the main tongs 300 are released, the accumulator 3 releases the hydraulic oil, the hydraulic oil flows into the oil cylinder 21 through the second oil channel and the first oil channel, the pressure of the hydraulic oil in the oil cylinder 21 rises again to be greater than the gravity of the jacking structure 22 and the main tongs 300, so as to drive the jacking structure 22 to drive the main tongs 300 to rise, so that the main tongs 300 are reset, and it is convenient for the next make-up work.

[0046] In another embodiment of the present invention, when the main tongs 300 need to perform a shattering operation, the on-off structure 4 connects the accumulator 3 and the first oil channel, the main tongs 300 are clamped for shattering, the accumulator 3 releases the hydraulic oil, and the hydraulic oil flows into the oil cylinder 21 through the second oil channel and the first oil channel. The pressure of the hydraulic oil in the oil cylinder 21 rises to a level greater than the gravity of the jacking structure 22 and the main tongs 300, and the jacking structure 22 is driven to drive the main tongs 300 to rise to perform the shattering operation. After the shattering is completed, the main tongs 300 are released, the accumulator 3 absorbs the hydraulic oil discharged from the oil cylinder 21, and the pressure of the hydraulic oil in the oil cylinder 21 drops again to a level lower than the gravity of the jacking structure 22 and the main tongs 300, so that the main tongs 300 are reset to perform the next shattering operation.

[0047] In summary, in the present invention, when the main tongs 300 need to be made up or made to break out, the accumulator 3 absorbs or releases hydraulic oil to adjust the position of the main tongs 300, thereby actively adjusting the clamping position of the clamping tongs to meet the working requirements of the main tongs 300.

[0048] It can be understood that the present invention does not limit the specific form of the jacking structure 22. In one embodiment of the present invention, the jacking structure 22 includes a hydraulic rod, which is inserted into the inner cavity of the oil cylinder 21 and is movably sealed with the oil cylinder 21 in the up and down directions. In this way, the lower end surface of the hydraulic rod and the oil cylinder 21 are mutually enclosed to form a cavity section, and the hydraulic oil is in the cavity section. When the hydraulic oil flows from the oil supply tank 11 to the oil cylinder 21, the oil pressure of the hydraulic oil in the cavity section increases to squeeze the lower end surface of the hydraulic rod, driving the hydraulic rod to drive the main clamp 300 to move upward; when the hydraulic oil flows from the oil cylinder 21 to the oil supply tank 11, the oil pressure of the hydraulic oil in the cavity section decreases, and under the action of gravity, the hydraulic cylinder drives the main clamp 300 to move downward.

[0049] In another embodiment of the present invention, the lifting structure 22 may further include a sliding portion 221 and a transmission rod 222, wherein the sliding portion 221 is slidably installed in the inner cavity of the oil cylinder 21 along the up-down direction, and the sliding portion 221 and the oil cylinder 21 are movably sealed in the up-down direction, and the sliding portion 221 divides the inner cavity of the oil cylinder 21 into a first cavity section 211 and a second cavity section 212 that are independent of each other, the first cavity section 211 is connected to the first oil channel, one end of the transmission rod 222 is inserted into the second cavity section 212 and connected to the sliding portion 221, and the other end is used to drive the main pliers 300 to move along the up-down direction. Similarly, when the hydraulic oil flows from the oil supply tank 11 into the oil cylinder 21, the hydraulic oil flows into the first cavity section 211, and the oil pressure in the first cavity section 211 increases to overcome the gravity of the lifting structure 22 and the main tongs 300, and squeeze the lower end surface of the transmission part, thereby driving the lifting structure 22 and the main tongs 300 to rise; when the hydraulic oil flows from the oil cylinder 21 to the oil supply tank 11, the hydraulic oil flows out of the first cavity section 211, and the oil pressure in the first cavity section 211 decreases, which cannot overcome the gravity of the lifting structure 22 and the main tongs 300, and the lifting structure 22 and the main tongs 300 descend under the action of gravity.

[0050] In other embodiments of the present invention, the lifting structure 22 may also be configured as other forms that can cooperate with the oil cylinder 21 in a sliding seal, and may be selected according to actual needs during actual configuration.

[0051] When the lifting structure 22 includes the sliding part 221 and the transmission rod 222, in one embodiment of the present invention, the iron roughneck pliers body floating device 100 also has a third oil passage, which connects the second chamber section 212 and the oil supply tank 11, and the flow direction of the hydraulic oil in the third oil passage is opposite to that in the first oil passage. With such arrangement, when the lifting structure 22 drives the main pliers 300 to rise, the hydraulic oil in the first oil passage flows from the oil supply tank 11 into the first cavity section 211. At this time, the hydraulic oil in the third oil passage flows from the second cavity section 212 into the oil supply tank 11, reducing the oil pressure in the second cavity section 212, so that a negative pressure is formed in the second cavity section 212, so as to ensure the speed and accuracy of the main pliers 300 being driven up by the lifting structure 22; and when the lifting structure 22 drives the main pliers 300 to descend, the hydraulic oil in the first oil passage also flows from the first cavity section 211 into the oil supply tank 11, and the hydraulic oil in the third oil passage flows from the oil supply tank 11 into the second cavity section 212, increasing the oil pressure in the second cavity section 212, thereby pressing downward the upper end surface of the sliding portion 221, so as to ensure the speed and accuracy of the main pliers 300 being driven down by the lifting structure 22.

[0052] It should be noted that, in the present invention, the third oil passage is also connected to the switching structure 12, and the flow direction of the hydraulic oil in the first oil passage and the third oil passage is switched by the switching structure 12, so that the flow direction of the hydraulic oil in the third oil passage and the first oil passage is always opposite.

[0053] Of course, the present invention does not limit the specific structural form of the switching structure 12. In one embodiment of the present invention, the switching structure 12 includes a reversing valve 121, and the reversing valve 121 has at least two valve ports, and the two valve ports of the reversing valve 121 are connected to the first oil passage and the second oil passage, respectively. In this way, the reversing valve 121 can switch the connection between the two valve ports and the oil inlet and the oil outlet. When the valve port connected to the first oil passage is connected to the oil inlet of the reversing valve 121, and the valve port connected to the third oil passage is connected to the oil outlet, the lifting structure 22 is driven to drive the main pliers 300 to rise; when the valve port connected to the first oil passage is connected to the oil outlet, and the valve port connected to the third oil passage is connected to the oil inlet, the lifting structure 22 is driven to drive the main pliers 300 to descend.

[0054] In another embodiment of the present invention, the switching structure 12 can also be configured as two oil pumps spaced apart in the oil supply tank 11, one of the oil pumps being connected to the first oil passage, and the other of the oil pumps being connected to the third oil passage. In this configuration, when it is necessary to drive the lifting structure 22 to drive the main pliers 300 to rise, the oil pump connected to the first oil passage rotates forward to drive the hydraulic oil in the first oil passage to flow from the oil supply tank 11 into the first cavity section 211, and the oil pump connected to the third oil passage rotates reversely to drive the hydraulic oil in the third oil passage to flow into the first cavity section 211. The hydraulic oil flows from the second cavity section 212 into the oil supply tank 11 to drive the lifting structure 22 to rise; when it is necessary to drive the lifting structure 22 to drive the main pliers 300 to descend, the oil pump connected to the first oil channel reverses to drive the hydraulic oil in the first oil channel to flow from the first cavity section 211 into the oil supply tank 11, and the oil pump connected to the third oil channel rotates forward to drive the hydraulic oil in the third oil channel to flow from the oil supply tank 11 into the second cavity section 212 to drive the lifting structure 22 to descend.

[0055] Of course, in other embodiments of the present invention, the switching structure 12 can also be set to other structures that can make the flow direction of the hydraulic oil in the third oil channel always opposite to the flow direction of the hydraulic oil in the first oil channel. In actual setting, it can be selected according to needs, and the present invention does not impose any restrictions on this.

[0056] In addition, due to the large size of the main tongs 300, when only one of the jacking structures 22 is provided to drive the main tongs 300 to move up and down, it is easy for the main tongs 300 to be subjected to unbalanced force, resulting in the main tongs 300 tilting. Therefore, in some embodiments of the present invention, the hydraulic mechanisms 2 are arranged at intervals, and each of the hydraulic mechanisms 2 includes an oil cylinder 21 and a jacking structure 22. The parts of the multiple jacking structures 22 exposed in the corresponding oil cylinders 21 are all connected to the main tongs 300. In this way, the main tongs 300 are driven to move up and down by the multiple jacking structures 22 to ensure the stability of the movement of the main tongs 300 and avoid the main tongs 300 from tilting.

[0057] When the hydraulic mechanism 2 is provided with multiple ones, in order to drive the multiple jacking structures 22 to move together at the same time, it is necessary to fill the hydraulic oil into each of the first chamber sections 211 at the same time, or release the hydraulic oil at the same time. Therefore, in order to realize the simultaneous filling or releasing of the multiple first chamber sections 211, in one embodiment of the present invention, the first oil channel includes a first branch and multiple second branches, one end of each of the multiple second branches is connected to one end of the first branch, and the other end is respectively connected to the multiple first chamber sections 211, and the other end of the first branch is connected to the oil supply tank 11. With this arrangement, when it is necessary to drive the jacking structure 22 to drive the main pliers 300 to rise, it is necessary to fill the hydraulic oil into the multiple first chamber sections 211 at the same time, and the hydraulic oil is discharged from the first chamber sections 211 in the oil supply tank 11. One end of the branch flows into the first branch, and then flows into multiple second branches at the other end of the first branch at the same time, and finally flows into multiple first chamber sections 211 at the same time, and at the same time increases the oil pressure in the multiple first chamber sections 211, drives the multiple jacking structures 22 to jointly drive the main pliers 300 to rise; when it is necessary to drive the jacking structure 22 to drive the main pliers 300 to descend, it is necessary to release oil from multiple first chamber sections 211 at the same time, and the hydraulic oil in each first chamber section 211 flows into the corresponding second branch, and the hydraulic oil in multiple second branches is then uniformly converged into the first branch to flow back to the oil supply tank 11, and at the same time reduces the oil pressure in the multiple first chamber sections 211, drives the multiple jacking structures 22 to jointly drive the main pliers 300 to descend.

[0058] Furthermore, in order to ensure the stability of the lifting structure 22 driving the main pliers 300 to rise, it is necessary not only to fill the plurality of first chamber sections 211 with hydraulic oil at the same time, but also to balance the pressure of the hydraulic oil in the plurality of first chamber sections 211, so as to ensure that the hydraulic oil in each first chamber section 211 gives the same pressure to the corresponding sliding part 221, maintain the stable rise of the main pliers 300, prevent the oil pressure in any first chamber section 211 from being greater than or less than the oil pressure in other first chamber sections 211, make the lifting stroke of the lifting structure 22 corresponding to the first chamber section 211 greater than or less than the lifting stroke of other lifting structures 22, and make the main pliers 300 tilt, so as to prevent the main pliers 300 from being tilted. This affects the stability of the activity of the main tongs 300. Therefore, in another embodiment of the present invention, the iron roughneck tongs body floating device 100 also includes a balancing valve 5, and the balancing valve 5 is arranged on the first branch. It should be noted that the inlet of the balancing valve 5 is connected to the first branch, and the balancing valve 5 has multiple outlets, and each outlet of the balancing valve 5 is connected to one of the second branches. In this way, the amount of hydraulic oil flowing into each of the second branches is balanced and adjusted by the balancing valve 5, so as to balance the oil pressure in each of the second branches, so that the oil pressure in the multiple first chamber sections 211 is equal, and the strokes of the multiple jacking structures 22 are equal, thereby maintaining the stability of the main tongs 300.

[0059] Similarly, when the hydraulic mechanism 2 is provided with multiple ones, in order to simultaneously drive the multiple jacking structures 22 to move together, it is also necessary to simultaneously fill the hydraulic oil into each second cavity segment 212, or release the hydraulic oil at the same time. Therefore, in order to realize the simultaneous filling or simultaneous draining of multiple second cavity segments 212, in one embodiment of the present invention, the third oil channel includes a third branch and multiple fourth branches, one end of each of the multiple fourth branches is connected to one end of the third branch, and the other end is respectively connected to multiple second cavity segments 212, and the other end of the third branch is connected to the oil supply tank 11. With such a configuration, when it is necessary to drive the jacking structure 22 to drive the main pliers 300 to rise, that is, it is necessary for multiple second cavity segments 212 to drain oil at the same time, the hydraulic oil in each second cavity segment 212 will enter the corresponding In the fourth branch, the hydraulic oils in the plurality of the fourth branches are uniformly converged into the third branch to flow back into the oil supply tank 11, and at the same time reduce the oil pressure in the plurality of the second chamber sections 212, so that the plurality of the jacking structures 22 can jointly drive the main pliers 300 to rise; and when it is necessary to drive the jacking structure 22 to drive the main pliers 300 to descend, it is necessary to simultaneously fill the plurality of the second chamber sections 212 with hydraulic oil, and the hydraulic oil flows from the oil supply tank 11 from one end of the third branch into the third branch, and then flows from the other end of the third branch into the plurality of the fourth branches at the same time, and finally flows into the plurality of the second chamber sections 212 at the same time, so as to simultaneously increase the oil pressure in the plurality of the second chamber sections 212, and drive the plurality of the jacking structures 22 to drive the main pliers 300 to descend.

[0060] It should be noted that when the multiple lifting structures 22 jointly drive the main clamp 300 to descend, due to the influence of the gravity of the main clamp 300, the stability of the main clamp 300 during the descent process is relatively good. Therefore, the balance valve 5 may not be set to balance the oil pressure in the multiple second chamber sections 212.

[0061] Of course, in another embodiment of the present invention, the balancing valve 5 may also be provided on the third branch, the inlet of the balancing valve 5 is connected to the third branch, and the multiple outlets of the balancing valve 5 are respectively connected to the multiple fourth branches. The balancing valve 5 is provided to balance the oil pressure in the multiple fourth branches, and then balance the oil pressure in the multiple second cavity sections 212, thereby ensuring that the active strokes of the jacking structures 22 corresponding to the multiple second cavity sections 212 are equal, thereby further ensuring the stability of the main pliers 300 during the descent process.

[0062] In addition, in the present invention, the on-off structure 4 can be set as an on-off valve 41, and the on-off valve 41 has a first valve port 411 and a second valve port 412. The first valve port 411 is connected to the first oil channel, and the second valve port 412 is connected to the accumulator 3. The on-off valve 41 has a first state and a second state. In the first state, the first valve port 411 and the second valve port 412 are connected, and in the second state, the first valve port 411 and the second valve port 412 are disconnected, and the on-off valve 41 can switch between the first state and the second state. In this way, when the lifting structure 22 drives the main pliers 300 to rise, the on-off valve 41 switches to the first state, connects the first valve port 411 and the second valve port 412, and then connects the accumulator 3 and the first oil channel, so that the accumulator 3 can be filled with fluid; when the lifting structure 22 drives the main pliers 300 to descend, the on-off valve 41 switches to the second state, disconnects the first valve port 411 and the second valve port 412, disconnects the accumulator 3 and the first oil channel, so as to maintain the oil pressure of the accumulator 3; and when the main pliers 300 needs to be made up or made to break out, the on-off valve 41 switches to the first state, connects the first valve port 411 and the second valve port 412, and the accumulator 3 is connected to the first oil channel, so that the accumulator 3 can adjust the position of the main pliers 300 by filling and draining oil.

[0063] The present invention does not limit the specific type of the on-off valve 41. In one embodiment of the present invention, the on-off valve 41 can be set as an electrically controlled valve. The electrically controlled valve can switch between the first state and the second state according to different movement forms of the main clamp 300 to achieve connection or disconnection between the first valve port 411 and the second valve port 412.

[0064] In another embodiment of the present invention, the on-off valve 41 can also be set as a hydraulically controlled valve. Specifically, the iron roughneck pliers body floating device 100 also includes a stabilizing oil tank 6, and the on-off valve 41 also includes a first drive port 413 and a second drive port 414. The first drive port 413 is connected to the third oil channel, and the second drive port 414 is connected to the stabilizing oil tank 6, so as to drive the on-off valve 41 to switch between the first state and the second state through the pressure difference between the first drive port 413 and the second drive port 414. In this configuration, the first drive port 413 is connected to the stabilizing oil tank 6, and the oil pressure in the stabilizing oil tank 6 is always maintained unchanged. The second drive port 414 is connected to the third oil channel. When the jacking structure 22 drives the main pliers 300 to rise, the hydraulic oil in the third oil channel is in a low-pressure state, the pressure of the first drive port 413 is greater than the pressure of the second drive port 414, and the hydraulic control valve switches to the first state, connecting the first valve port 411 and the second valve port 412; when the jacking structure 22 drives the main pliers 300 to descend, the hydraulic oil in the third oil channel is in a high-pressure state. The pressure of the first drive port 413 is lower than the pressure of the second drive port 414, and the hydraulic control valve switches to the second state to disconnect the first valve port 411 and the second valve port 412; when the main pliers 300 needs to perform make-up or make-out work, the hydraulic oil in the third oil channel is in a low-pressure state, the pressure of the first drive port 413 is higher than the pressure of the second drive port 414, and the hydraulic control valve switches to the first state to connect the first valve port 411 and the second valve port 412. Such a setting can ensure the accuracy of the hydraulic control valve switching between the first state and the second state.

[0065] See also Figure 2 The present invention also proposes an iron roughneck pliers device 1000, which includes a frame 200, an iron roughneck pliers floating device 100 and a main pliers 300. The specific structure of the iron roughneck pliers floating device 100 refers to the above embodiment. Since the iron roughneck pliers device 1000 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The main pliers 300 is connected to the jacking structure 22 of the iron roughneck pliers floating device 100 to move in the first direction with the jacking structure 22.

[0066] It should be noted that the frame 200 is further provided with a linear guide structure 400, which is connected to the main clamp 300 to limit the up-down and up-down movement of the main clamp 300. The arrangement of the linear guide structure 400 can limit the specific up-down and up-down movement angles of the main clamp 300, thereby preventing the main clamp 300 from having an angle deviation during movement, thereby affecting the stability of its movement.

[0067] It can be understood that the present invention does not limit the specific structural form of the linear guide structure 400. In one embodiment of the present invention, the linear guide structure 400 includes a linear bearing extending in the up and down directions, and the linear bearing is sleeved on the portion of the jacking structure 22 exposed from the cylinder 21. When the jacking structure 22 drives the main pliers 300 to move up and down, the linear bearing can limit the specific movement direction of the jacking structure 22, and then limit the movement direction of the main pliers 300, so as to ensure the accuracy of the movement of the main pliers 300.

[0068] In another embodiment of the present invention, the linear guide structure 400 can also be configured as a linear guide rail extending in the up and down directions. The linear guide rail is arranged on the peripheral side of the main pliers 300 and is connected to the main pliers 300 in an up and down sliding manner. In this way, during the up and down movement of the main pliers 300, the linear guide rail can also limit the movement angle of the main pliers 300, thereby ensuring the accuracy of the movement of the main pliers 300 and avoiding angle deviation of the main pliers 300 during movement.

[0069] Of course, in other embodiments of the present invention, the linear guide structure 400 may also be configured as other structural forms that limit the movable angle of the main clamp 300, which can be selected according to actual needs during actual configuration.

[0070] Similarly, in one embodiment of the present invention, only one linear guide structure 400 may be provided; in another embodiment of the present invention, multiple linear guide structures 400 may be provided, and multiple linear guide structures 400 are arranged at intervals on the frame 200, and the present invention does not impose any restrictions on this.

[0071] In addition, in the present invention, the iron roughneck pliers device 1000 further includes an auxiliary pliers, which is disposed on the frame 200 and spaced apart from the iron roughneck pliers floating device 100 .

[0072] 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 floating device for an iron roughneck pliers body, characterized in that: The iron roughneck pliers body floating device has a first oil passage and a second oil passage, the end of the second oil passage is connected to the first oil passage, and the iron roughneck pliers body floating device includes: An oil supply assembly, comprising an oil supply tank and a switching structure, wherein the oil supply tank is connected to one end of the first oil passage, and the switching structure is arranged in the oil supply tank to switch the flow direction of the hydraulic oil in the first oil passage; A hydraulic mechanism comprises an oil cylinder and a lifting structure, wherein the inner cavity of the oil cylinder is connected to the other end of the first oil channel, the lifting structure is slidably installed in the inner cavity of the oil cylinder along a first direction and partially exposed from the oil cylinder, and the portion of the lifting structure exposed from the oil cylinder is used to connect to the main pliers and drive the main pliers to move along the first direction; An accumulator is provided at the other end portion communicating with the second oil passage; and; The on-off structure is provided on the second oil passage, and the on-off structure is used to switch the connection or disconnection between the accumulator and the first oil passage.

2. The iron roughneck pliers body floating device according to claim 1, characterized in that: The jacking structure comprises: a sliding part, slidably mounted in the inner cavity of the oil cylinder along a first direction, and the sliding part and the oil cylinder are arranged in a movable seal along the first direction, the sliding part divides the inner cavity of the oil cylinder into a first cavity section and a second cavity section that are independent of each other, and the first cavity section is connected to the first oil passage; and A transmission rod, one end of which is inserted into the second cavity section and connected to the sliding part, and the other end of which is used to drive the main pliers to move along the first direction.

3. The iron roughneck pliers body floating device according to claim 2, characterized in that: The iron roughneck pliers body floating device also has a third oil passage, the third oil passage is connected with the second chamber section and the oil supply tank, and the flow direction of the hydraulic oil in the third oil passage is opposite to that in the first oil passage.

4. The iron roughneck pliers body floating device according to claim 3, characterized in that: The switching structure includes a reversing valve having at least two valve ports, and the two valve ports of the reversing valve are respectively connected to the first oil passage and the second oil passage.

5. The iron roughneck pliers body floating device according to claim 3, characterized in that: The hydraulic mechanism is arranged in multiple intervals, wherein: The first oil passage comprises a first branch and a plurality of second branches, one end of each of the plurality of second branches is connected to one end of the first branch, and the other end is respectively connected to a plurality of the first chamber sections, and the other end of the first branch is connected to the oil supply tank; and / or, The third oil passage includes a third branch and multiple fourth branches, one end of each of the multiple fourth branches is connected to one end of the third branch, and the other end is respectively connected to multiple second cavity sections, and the other end of the third branch is connected to the oil supply tank.

6. The iron roughneck pliers body floating device according to claim 5, characterized in that: The iron roughneck pliers body floating device further comprises a balancing valve, and the balancing valve is arranged on the first branch.

7. The iron roughneck pliers body floating device according to claim 1, characterized in that: The on-off structure includes an on-off valve, the on-off valve having a first valve port and a second valve port, the first valve port being connected to the first oil passage, the second valve port being connected to the accumulator, the on-off valve having a first state and a second state, the first valve port and the second valve port being connected in the first state, and the first valve port and the second valve port being disconnected in the second state; The on-off valve can be switched between the first state and the second state.

8. The iron roughneck pliers body floating device according to claim 7, characterized in that: The lifting structure comprises a sliding part, which is slidably installed in the inner cavity of the oil cylinder along a first direction, and the sliding part and the oil cylinder are movably sealed along the first direction to separate the inner cavity of the oil cylinder into a first cavity section and a second cavity section which are independent of each other; The iron roughneck pliers body floating device also has a third oil passage, one end of which is connected to the second cavity section, and the other end of which is connected to the oil supply tank; The iron roughneck pliers body floating device also includes a stabilizing oil tank; The on-off valve also includes a first drive port and a second drive port, wherein the first drive port is connected to the third oil passage, and the second drive port is connected to the stabilizing oil tank, so as to drive the on-off valve to switch between the first state and the second state through the pressure difference between the first drive port and the second drive port.

9. An iron roughneck pliers device, characterized in that: include: frame; An iron roughneck pliers body floating device is arranged on the frame, and the iron roughneck pliers body floating device comprises the iron roughneck pliers body floating device according to any one of claims 1 to 8; as well as, A main tong is connected to the jacking structure of the iron roughneck tongs body floating device to move along with the jacking structure in a first direction.

10. The iron roughneck pliers device according to claim 9, characterized in that: The frame is also provided with a linear guide structure, which is connected to the main pliers to limit the movement of the main pliers in the first direction.

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