Iron roughneck tong body floating device and iron roughneck tong device

Abstract

The application discloses an iron roughneck clamp body floating device and an iron roughneck clamp body device, and relates to the technical field of iron roughnecks, wherein the iron roughneck clamp body floating device has a first oil passage and a second oil passage, the end of the second oil passage is communicated with the first oil passage, the iron roughneck clamp body floating device comprises an oil supply assembly, a hydraulic mechanism, an accumulator and an on-off structure, the oil supply assembly comprises an oil supply tank and a switching structure, the oil supply tank is communicated with one end of the first oil passage, the switching structure is arranged in the oil supply tank to switch the flow direction of the first oil passage, the hydraulic mechanism comprises a cylinder and a jacking structure, the inner cavity of the cylinder is communicated with the other end of the first oil passage, the jacking structure is slidably arranged in the inner cavity of the cylinder along a first direction and partially exposed from the cylinder, the jacking structure is used for connecting a main clamp and driving the main clamp to move along the first direction, the accumulator is communicated with the other end of the second oil passage, and the on-off structure is arranged in the second oil passage to switch the on-off of the accumulator and the first oil passage. In this way, the clamping position of the clamping clamp can be actively adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of iron roughneck, in particular to an iron roughneck tong body floating device and an iron roughneck tong body device. BACKGROUND

[0002] The iron roughneck is an important automatic device in oil exploitation engineering. In the process of making up and breaking out, the main tong moves up and down with the screwing in and out of the drill pipe thread. In order to prevent the weight of the main tong from being applied to the drill pipe to damage the drill pipe thread, a supporting device is needed to offset the weight of the main tong to reduce the stress on the drill pipe. The existing technical solutions in the industry all use springs and supporting rods to support the main tong. Because the tong body is heavy, the required spring strength is high and the compression amount is small, so the tong body stroke is small. When the length of the drill pipe thread is long, the clamping tong needs to be loosened, the spring needs to be reset, and then the clamping needs to be tightened again, which reduces the operation efficiency. Moreover, the use of springs cannot actively adjust the clamping position of the clamping tong. SUMMARY

[0003] The main purpose of the present application is to provide an iron roughneck tong body floating device and an iron roughneck tong body device, which aims to solve the problem that the existing iron roughneck supporting device cannot actively adjust the clamping position of the clamping tong.

[0004] To achieve the above-mentioned purpose, the iron roughneck tong body floating device provided by the present application has a first oil channel and a second oil channel, the end of the second oil channel is communicated with the first oil channel, and the iron roughneck tong body floating device comprises:

[0005] A oil supply assembly comprising an oil supply tank and a switching structure, the oil supply tank is communicated with one end of the first oil channel, and the switching structure is arranged in the oil supply tank to switch the flow direction of the hydraulic oil in the first oil channel;

[0006] A hydraulic mechanism comprising a oil cylinder and a jacking structure, the inner cavity of the oil cylinder is communicated with the other end of the first oil channel, the jacking structure is slidingly installed in the inner cavity of the oil cylinder along a first direction, and part of the jacking structure is exposed to the oil cylinder, the part of the jacking structure exposed to the oil cylinder is used to connect the main tong and drive the main tong to move along the first direction;

[0007] An accumulator is arranged in communication with the other end of the second oil channel; and

[0008] A on-off structure is arranged on the second oil channel, and the on-off structure is used to switch the communication or disconnection between the accumulator and the first oil channel.

[0009] In an embodiment, the jacking structure comprises:

[0010] a sliding part slidably installed in the inner cavity of the oil cylinder along the first direction, and the sliding part is movably sealed with the oil cylinder 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 which are independent of each other, and the first cavity section communicates with the first oil passage; and

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

[0012] In an embodiment, the iron roughneck clamp body floating device further has a third oil passage, the third oil passage communicates with the second cavity 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 an 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 respectively communicate with the first oil passage and the second oil passage.

[0014] In an embodiment, the hydraulic mechanism is spaced apart and has a plurality of hydraulic mechanisms, wherein:

[0015] The first oil passage includes 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, the other end of each of the plurality of second branches is connected to a first cavity section, 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 a plurality of fourth branches, one end of each of the plurality of fourth branches is connected to one end of the third branch, the other end of each of the plurality of fourth branches is connected to a second cavity section, and the other end of the third branch is connected to the oil supply tank.

[0017] In an embodiment, the iron roughneck clamp body floating device further includes a balance valve, and the balance valve is arranged on the first branch.

[0018] In an embodiment, the on-off structure includes an on-off valve, the on-off valve has a first valve port and a second valve port, the first valve port communicates with the first oil passage, and the second valve port communicates with the accumulator, the on-off valve has a first state and a second state, in the first state, the first valve port and the second valve port are connected, and in the second state, the first valve port and the second valve port are disconnected.

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

[0020] In an embodiment, the jacking structure comprises a sliding part, which is slidingly installed in the inner cavity of the oil cylinder along the first direction, and the sliding part is movably sealed with the oil cylinder 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;

[0021] The iron roughneck floating device further comprises a third oil passage, one end of the third oil passage being communicated with the second cavity section and the other end of the third oil passage being communicated with the oil supply tank;

[0022] The iron roughneck floating device further comprises a stable oil tank;

[0023] The on-off valve further comprises a first driving port and a second driving port, the first driving port being communicated with the third oil passage, and the second driving port being communicated with the stable oil tank, so that the on-off valve is switched between the first state and the second state by the pressure difference between the first driving port and the second driving port.

[0024] The present application further provides an iron roughneck device, comprising:

[0025] A rack;

[0026] An iron roughneck floating device arranged on the rack, the iron roughneck floating device comprising the iron roughneck floating device described above; and

[0027] A main clamp connected to the jacking structure of the iron roughneck floating device to move with the jacking structure along the first direction.

[0028] In an embodiment, a linear guide structure is further arranged on the rack, the linear guide structure being connected to the main clamp to limit the movement of the main clamp along the first direction.

[0029] In the technical scheme of the present application, when the main clamp needs to move along the first direction, the flow direction of the hydraulic oil in the first oil passage is switched by using the switching structure, 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 to change the content of the hydraulic oil in the oil cylinder, drive the jacking structure to move along the first direction, and further drive the main clamp to move along the first direction; when the main clamp needs to be clamped for make-up or breakout work, the accumulator is used to provide driving force for the jacking structure, the accumulator releases or absorbs hydraulic oil when the main clamp is tightened or loosened, changes the content of the hydraulic oil in the oil cylinder, and adjusts the position of the jacking structure along the first direction, so that the main clamp completes the make-up or breakout work. In this way, the clamping position of the clamp can be actively adjusted to meet the working requirements of the main clamp. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0031] Figure 1 A structural schematic view of an embodiment of the iron roughneck tong body floating device provided by the present application is shown in the figure.

[0032] Figure 2 A structural schematic view of an embodiment of the iron roughneck tong body device provided by the present application is shown in the figure.

[0033] Explanation of reference numerals:

[0034] 1000, iron roughneck tong body device; 100, iron roughneck tong body 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, jacking 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, oil stabilizing tank; 200, rack; 300, main tong; 400, linear guide structure.

[0035] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0037] It should be noted that if the embodiments of the present application 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 the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0038] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, 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", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the 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, nor in the protection scope required by the present application.

[0039] The present application provides a floating device for iron roughneck jaw body, aiming at solving the problem that the existing iron roughneck support device cannot actively adjust the clamping position of the clamping jaw.

[0040] Please refer to Figure 1 In an embodiment of the present application, the iron roughneck jaw body floating device 100 has a first oil channel and a second oil channel, the end of the second oil channel is communicated with the first oil channel, the iron roughneck jaw body floating device 100 comprises a oil supply assembly 1, a hydraulic mechanism 2, an accumulator 3 and an on-off structure 4, the oil supply assembly 1 comprises an oil supply tank 11 and a switching structure 12, the oil supply tank 11 is communicated with one end of the first oil channel, the switching structure 12 is arranged in the oil supply tank 11, used to switch the flow direction of the hydraulic oil in the first oil channel, the hydraulic mechanism 2 comprises a oil cylinder 21 and a jacking structure 22, the inner cavity of the oil cylinder 21 is communicated with the other end of the first oil channel, the jacking structure 22 is slidingly installed in the inner cavity of the oil cylinder 21 along the first direction, and part of the jacking structure 22 is exposed to the oil cylinder 21, the part of the jacking structure 22 exposed to the oil cylinder 21 is used to connect the main jaw 300 and drive the main jaw 300 to move along the first direction, the accumulator 3 is arranged in communication with the other end of the second oil channel, and the on-off structure 4 is arranged on the second oil channel, the on-off structure 4 is used to switch the communication or disconnection between the accumulator 3 and the first oil channel.

[0041] In the technical solution of the present application, when the main clamp 300 needs to move in the first direction, the flow direction of the hydraulic oil in the first oil channel is switched by using the switching structure 12, 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, thereby changing the amount of hydraulic oil in the oil cylinder 21 and driving the lifting structure 22 to move in the first direction, thereby driving the main clamp 300 to move in the first direction. When the main clamp 300 needs to be clamped for make-up or breakout work, the accumulator 3 is used to provide driving force for the lifting structure 22, and the accumulator 3 releases or absorbs hydraulic oil when the main clamp 300 is tightened or loosened, thereby changing the amount of hydraulic oil in the oil cylinder 21 and adjusting the position of the lifting structure 22 in the first direction, so that the main clamp 300 can complete make-up or breakout work. In this way, the clamping position of the clamp can be actively adjusted to meet the working requirements of the main clamp 300.

[0042] It should be noted that the first direction can be any of the upward-downward direction, the front-rear direction or the left-right direction, and the present application does not limit the first direction. Hereinafter, the first direction is taken as the upward-downward direction as an example.

[0043] Specifically, in an embodiment of the present application, when the main clamp 300 needs to be driven 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 to the oil cylinder 21, thereby filling the inner cavity of the oil cylinder 21 and making the oil pressure in the oil cylinder 21 greater than the gravity of the lifting structure 22 and the main clamp 300, so as to drive the lifting structure 22 to move upward, thereby driving the main clamp 300 to move, and achieving the position adjustment of the main clamp 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 rises.

[0044] In another embodiment of the present application, when the main tongs 300 need to be driven to move downward, the switching structure 12 switches the flow direction of the hydraulic oil in the first oil passage, so that the hydraulic oil in the first oil passage flows from the oil cylinder 21 to the oil supply tank 11, the hydraulic oil in the oil cylinder 21 is reduced, the oil pressure in the oil cylinder 21 is less than the gravity of the lifting structure 22 and the main tongs 300, the lifting structure 22 can move downward, thereby driving the main tongs 300 to move downward, so as to realize the position adjustment of the main tongs 300. At this time, the on-off structure 4 disconnects the accumulator 3 and the first oil passage, so as to maintain the oil pressure in the accumulator 3 unchanged, preventing the accumulator 3 from being filled with liquid during the descending process of the lifting structure 22, thereby preventing the rebound phenomenon of the lifting structure 22 after stopping descending under the action of the accumulator 3.

[0045] In another embodiment of the present application, when the main tongs 300 need to be driven to move downward, the switching structure 12 switches the flow direction of the hydraulic oil in the first oil passage, so that the hydraulic oil in the first oil passage flows from the oil cylinder 21 to the oil supply tank 11, the hydraulic oil in the oil cylinder 21 is reduced, the oil pressure in the oil cylinder 21 is less than the gravity of the lifting structure 22 and the main tongs 300, the lifting structure 22 can move downward, thereby driving the main tongs 300 to move downward, so as to realize the position adjustment of the main tongs 300. At this time, the on-off structure 4 disconnects the accumulator 3 and the first oil passage, so as to maintain the oil pressure in the accumulator 3 unchanged, preventing the accumulator 3 from being filled with liquid during the descending process of the lifting structure 22, thereby preventing the rebound phenomenon of the lifting structure 22 after stopping descending under the action of the accumulator 3.

[0046] In another embodiment of the present application, when the main tongs 300 need to be driven to move downward, the switching structure 12 switches the flow direction of the hydraulic oil in the first oil passage, so that the hydraulic oil in the first oil passage flows from the oil cylinder 21 to the oil supply tank 11, the hydraulic oil in the oil cylinder 21 is reduced, the oil pressure in the oil cylinder 21 is less than the gravity of the lifting structure 22 and the main tongs 300, the lifting structure 22 can move downward, thereby driving the main tongs 300 to move downward, so as to realize the position adjustment of the main tongs 300. At this time, the on-off structure 4 disconnects the accumulator 3 and the first oil passage, so as to maintain the oil pressure in the accumulator 3 unchanged, preventing the accumulator 3 from being filled with liquid during the descending process of the lifting structure 22, thereby preventing the rebound phenomenon of the lifting structure 22 after stopping descending under the action of the accumulator 3.

[0047] In conclusion, in the present application, when the main tong 300 needs to be applied or removed, the accumulator 3 absorbs or releases hydraulic oil to adjust the position of the main tong 300, so as to actively adjust the clamping position of the clamping tong and meet the working requirements of the main tong 300.

[0048] It can be understood that the present application does not limit the specific form of the jacking structure 22. In an embodiment of the present application, the jacking structure 22 comprises a hydraulic rod which is inserted into the inner cavity of the oil cylinder 21 and is in sliding sealing cooperation with the oil cylinder 21 in the up-down direction. In this way, the lower end surface of the hydraulic rod and the oil cylinder 21 surround each other to form a cavity section in which the hydraulic oil is located. 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 rises to press the lower end surface of the hydraulic rod, so as to drive the hydraulic rod to drive the main tong 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 tong 300 to move downward.

[0049] In another embodiment of the present application, the jacking structure 22 can further comprise a sliding part 221 and a transmission rod 222. The sliding part 221 is slidingly installed in the inner cavity of the oil cylinder 21 in the up-down direction and is in sliding sealing cooperation with the oil cylinder 21 in the up-down direction. The sliding part 221 divides the inner cavity of the oil cylinder 21 into a first cavity section 211 and a second cavity section 212 which are independent of each other. The first cavity section 211 is connected to the first oil channel, and one end of the transmission rod 222 is inserted into the second cavity section 212 and connected to the sliding part 221, and the other end is used to drive the main tong 300 to move in the up-down direction. Similarly, when the hydraulic oil flows from the oil supply tank 11 to the oil cylinder 21, the hydraulic oil flows into the first cavity section 211, and the oil pressure in the first cavity section 211 rises to overcome the gravity of the jacking structure 22 and the main tong 300 and press the lower end surface of the transmission part, so as to drive the jacking structure 22 and the main tong 300 to move upward. 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 and cannot overcome the gravity of the jacking structure 22 and the main tong 300, so that the jacking structure 22 and the main tong 300 move downward under the action of gravity.

[0050] In other embodiments of the present application, the jacking structure 22 can also be provided in other forms which can be in sliding sealing cooperation with the oil cylinder 21. In actual setting, it can be selected according to requirements.

[0051] When the lifting structure 22 comprises the sliding part 221 and the transmission rod 222, in an embodiment of the present application, the iron roughneck floating device 100 further comprises a third oil passage, which is in communication with the second cavity 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. In this way, when the lifting structure 22 drives the main clamp 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 flow direction of the hydraulic oil in the third oil passage is from the second cavity section 212 into the oil supply tank 11, so as to reduce the oil pressure in the second cavity section 212, form a negative pressure in the second cavity section 212, and ensure the speed and accuracy of the lifting structure 22 driving the main clamp 300 to rise; when the lifting structure 22 drives the main clamp 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, so as to increase the oil pressure in the second cavity section 212, and press the upper end surface of the sliding part 221 downward, so as to ensure the speed and accuracy of the lifting structure 22 driving the main clamp 300 to descend.

[0052] It should be noted that, in the present application, the third oil passage is also in communication with 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 as to ensure that the flow direction of the hydraulic oil in the first oil passage and the third oil passage is always opposite.

[0053] Of course, the present application does not limit the specific structure of the switching structure 12, in an embodiment of the present application, the switching structure 12 comprises 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 in communication with the first oil passage and the second oil passage respectively. In this way, the reversing valve 121 can switch the communication between the two valve ports and the oil inlet end and the oil outlet end, when the valve port in communication with the first oil passage is in communication with the oil inlet end of the reversing valve 121, and the valve port in communication with the third oil passage is in communication with the oil outlet end, the lifting structure 22 is driven to drive the main clamp 300 to rise; when the valve port in communication with the first oil passage is in communication with the oil outlet end, and the valve port in communication with the third oil passage is in communication with the oil inlet end, the lifting structure 22 is driven to drive the main clamp 300 to descend.

[0054] In another embodiment of the present application, the switching structure 12 can also be provided with two oil pumps spaced in the oil supply tank 11, one of the oil pumps is connected with the first oil channel, and the other oil pump is connected with the third oil channel. In this way, when the lifting structure 22 is required to drive the main clamp 300 to rise, the oil pump connected with the first oil channel is rotated in forward direction to drive the hydraulic oil in the first oil channel to flow from the oil supply tank 11 into the first cavity section 211, and the oil pump connected with the third oil channel is rotated in reverse direction to drive the hydraulic oil in the third oil channel to flow from the second cavity section 212 into the oil supply tank 11, so as to complete the driving of the lifting structure 22 to rise; when the lifting structure 22 is required to drive the main clamp 300 to descend, the oil pump connected with the first oil channel is rotated in reverse direction 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 with the third oil channel is rotated in forward direction to drive the hydraulic oil in the third oil channel to flow from the oil supply tank 11 into the second cavity section 212, so as to complete the driving of the lifting structure 22 to descend.

[0055] Of course, in other embodiments of the present application, the switching structure 12 can also be provided with other structures capable of making 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, which can be selected according to requirements in actual setting, and the present application does not limit this.

[0056] In addition, since the main clamp 300 has a large volume, when only one lifting structure 22 is provided to drive the main clamp 300 to move up and down, the main clamp 300 is prone to be unbalanced in force, which causes the main clamp 300 to tilt. Therefore, in some embodiments of the present application, a plurality of hydraulic mechanisms 2 are spaced, each of which includes an oil cylinder 21 and a lifting structure 22, and the parts of the plurality of lifting structures 22 exposed in the corresponding oil cylinders 21 are connected with the main clamp 300. In this way, the main clamp 300 is driven to move up and down by the plurality of lifting structures 22, so as to ensure the stability of the main clamp 300 and avoid the main clamp 300 from tilting.

[0057] When the hydraulic mechanism 2 is provided with multiple, in order to drive multiple lifting structures 22 to move simultaneously, it is necessary to simultaneously fill hydraulic oil into each first cavity section 211 or simultaneously release hydraulic oil. Therefore, in an embodiment of the present application, the first oil passage comprises 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 of each of the multiple second branches is connected to a corresponding first cavity section 211. The other end of the first branch is connected to the oil supply tank 11. In this way, when it is necessary to drive the lifting structures 22 to drive the main clamp 300 to rise, i.e. it is necessary to simultaneously fill hydraulic oil into multiple first cavity sections 211, hydraulic oil flows from one end of the first branch in the first branch, and then simultaneously flows into multiple second branches at the other end of the first branch, and finally simultaneously flows into multiple first cavity sections 211, thereby simultaneously increasing the oil pressure in multiple first cavity sections 211, driving multiple lifting structures 22 to jointly drive the main clamp 300 to rise. When it is necessary to drive the lifting structures 22 to drive the main clamp 300 to descend, i.e. it is necessary to simultaneously release hydraulic oil from multiple first cavity sections 211, hydraulic oil in each first cavity section 211 flows into the corresponding second branch, hydraulic oil in multiple second branches is unified to flow into the first branch to flow back to the oil supply tank 11, thereby simultaneously reducing the oil pressure in multiple first cavity sections 211, driving multiple lifting structures 22 to jointly drive the main clamp 300 to descend.

[0058] Further, in order to ensure the stability of the lifting of the main clamp 300 by the jacking structure 22, not only is it necessary to simultaneously fill hydraulic oil into multiple first cavity sections 211, but it is also necessary to balance the pressure of the hydraulic oil in multiple first cavity sections 211, so as to ensure that the hydraulic oil in each first cavity section 211 gives the same pressure to the corresponding sliding part 221, maintains the stable lifting of the main clamp 300, prevents the oil pressure in any first cavity section 211 from being greater or smaller than the oil pressure in other first cavity sections 211, makes the lifting stroke of the jacking structure 22 corresponding to the first cavity section 211 greater or smaller than the lifting stroke of other jacking structures 22, and makes the main clamp 300 tilt, thereby affecting the stability of the movement of the main clamp 300. Therefore, in another embodiment of the present application, the iron roughneck body floating device 100 further comprises a balance valve 5 provided on the first branch. It should be noted that the inlet of the balance valve 5 is connected to the first branch, and the balance valve 5 has multiple outlets, each outlet of the balance valve 5 being connected to a second branch. In this way, the balance valve 5 is used to balance and adjust the amount of hydraulic oil flowing into each second branch, thereby balancing the oil pressure in each second branch, so as to equalize the oil pressure in multiple first cavity sections 211, ensure that the lifting strokes of multiple jacking structures 22 are equal, and thus maintain the stability of the main clamp 300.

[0059] Likewise, when the hydraulic mechanism 2 is provided with multiple, in order to drive multiple lifting structures 22 to move simultaneously, it is also necessary to simultaneously fill hydraulic oil into each second cavity section 212 or simultaneously release hydraulic oil, therefore, in order to achieve simultaneous oil filling or oil release of multiple second cavity sections 212, in an embodiment of the present application, the third oil channel includes a third branch and multiple fourth branches, one end of each fourth branch is connected to one end of the third branch, and the other end is connected to multiple second cavity sections 212 respectively, the other end of the third branch is connected to the oil tank 11, in this way, when it is necessary to drive the lifting structures 22 to drive the main clamp 300 to rise, that is, it is necessary to simultaneously release hydraulic oil in multiple second cavity sections 212, the hydraulic oil in each second cavity section 212 will enter the corresponding fourth branch, the hydraulic oil in multiple fourth branches will flow into the third branch uniformly to flow back to the oil tank 11, at the same time, the oil pressure in multiple second cavity sections 212 is reduced, so that multiple lifting structures 22 can jointly drive the main clamp 300 to rise; when it is necessary to drive the lifting structures 22 to drive the main clamp 300 to descend, that is, it is necessary to simultaneously fill hydraulic oil into multiple second cavity sections 212, hydraulic oil flows from one end of the third branch into the third branch from the oil tank 11, and then flows into multiple fourth branches at the other end of the third branch, and finally flows into multiple second cavity sections 212, so as to simultaneously increase the oil pressure in multiple second cavity sections 212, drive multiple lifting structures 22 to drive the main clamp 300 to descend.

[0060] It should be noted that when 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 descending process is relatively good, therefore, the balance valve 5 can not be provided to balance the oil pressure in multiple second cavity sections 212.

[0061] Of course, in another embodiment of the present application, the balance valve 5 can also be provided on the third branch, the inlet of the balance valve 5 communicates with the third branch, and multiple outlets of the balance valve 5 respectively communicate with multiple fourth branches, by providing the balance valve 5, the oil pressure in multiple fourth branches is balanced, and then the oil pressure in multiple second cavity sections 212 is balanced, so as to ensure that the movement strokes of multiple second cavity sections 212 corresponding to the lifting structures 22 are equal, thereby further ensuring the stability of the main clamp 300 during the descending process.

[0062] Further, in the present application, the on-off structure 4 can be provided as an on-off valve 41, the on-off valve 41 has a first valve port 411 and a second valve port 412, the first valve port 411 communicates with the first oil passage, the second valve port 412 communicates with 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 communicated, in the second state, the first valve port 411 and the second valve port 412 are disconnected, and the on-off valve 41 can be switched between the first state and the second state. In this way, when the jacking structure 22 drives the main tongs 300 to rise, the on-off valve 41 is switched to the first state, the first valve port 411 and the second valve port 412 are communicated, and then the accumulator 3 and the first oil passage are communicated, so that the accumulator 3 can be filled with liquid; when the jacking structure 22 drives the main tongs 300 to descend, the on-off valve 41 is switched to the second state, the first valve port 411 and the second valve port 412 are disconnected, so that the accumulator 3 and the first oil passage are disconnected, so as to maintain the oil pressure of the accumulator 3; and when the main tongs 300 needs to be made up or broken down, the on-off valve 41 is switched to the first state, the first valve port 411 and the second valve port 412 are communicated, and the accumulator 3 is communicated with the first oil passage, so that the accumulator 3 can adjust the position of the main tongs 300 by filling and discharging oil.

[0063] However, the present application does not limit the specific type of the on-off valve 41, in an embodiment of the present application, the on-off valve 41 can be provided as an electric control valve, which can be switched between the first state and the second state according to different movement forms of the main tongs 300, to realize the communication or disconnection of the first valve port 411 and the second valve port 412.

[0064] In another embodiment of the present application, the on-off valve 41 can also be configured as a hydraulic control valve, specifically, the iron roughneck floating device 100 further comprises a stabilizing oil tank 6, and the on-off valve 41 further comprises a first driving port 413 and a second driving port 414, the first driving port 413 is communicated with the third oil channel, and the second driving port 414 is communicated with 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 driving port 413 and the second driving port 414. In this way, the first driving port 413 is communicated with the stabilizing oil tank 6, and the oil pressure in the stabilizing oil tank 6 is always maintained unchanged, the second driving port 414 is communicated with the third oil channel, when the jacking structure 22 drives the main clamp 300 to rise, the hydraulic oil in the third oil channel is in a low pressure state, the pressure of the first driving port 413 is greater than that of the second driving port 414, the hydraulic control valve switches to the first state, and the first valve port 411 and the second valve port 412 are communicated; when the jacking structure 22 drives the main clamp 300 to descend, the hydraulic oil in the third oil channel is in a high pressure state, the pressure of the first driving port 413 is less than that of the second driving 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 clamp 300 needs to be made up or broken out, the hydraulic oil in the third oil channel is in a low pressure state, the pressure of the first driving port 413 is greater than that of the second driving port 414, and the hydraulic control valve switches to the first state to communicate the first valve port 411 and the second valve port 412, so that the accuracy of switching of the hydraulic control valve between the first state and the second state can be ensured.

[0065] Please refer to Figure 2 The present application also provides an iron roughneck device 1000, which comprises a rack 200, an iron roughneck floating device 100 and a main clamp 300, the specific structure of the iron roughneck floating device 100 is referred to the above-mentioned embodiments, since the iron roughneck device 1000 adopts all the technical solutions of 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. Among them, the main clamp 300 is connected to the jacking structure 22 of the iron roughneck floating device 100 to move with the jacking structure 22 in the first direction.

[0066] It should be noted that the rack 200 is also provided with a linear guide structure 400, the linear guide structure 400 is connected with the main clamp 300, so as to limit the upward movement of the main clamp 300. The linear guide structure 400 can limit the specific activity angle of the main clamp 300 in the upward direction, so as to avoid the angle deviation of the main clamp 300 during the movement, thereby affecting the stability of the movement.

[0067] It can be understood that the present application does not limit the specific structure of the linear guide structure 400, in an embodiment of the present application, the linear guide structure 400 includes a linear bearing extending in the upward direction, the linear bearing is sleeved on the part of the jacking structure 22 exposed to the oil cylinder 21, when the jacking structure 22 drives the main clamp 300 to move upward, the linear bearing can limit the specific movement direction of the jacking structure 22, thereby limiting the movement direction of the main clamp 300, so as to ensure the accuracy of the movement of the main clamp 300.

[0068] In another embodiment of the present application, the linear guide structure 400 can also be provided as a linear guide rail extending in the upward direction, the linear guide rail is arranged on the side of the main clamp 300 and is in sliding connection with the main clamp 300 in the upward direction, in this way, during the movement of the main clamp 300 in the upward direction, the linear guide rail can also limit the activity angle of the main clamp 300, thereby ensuring the accuracy of the movement of the main clamp 300 and avoiding the angle deviation of the main clamp 300 during the movement.

[0069] Of course, in other embodiments of the present application, the linear guide structure 400 can also be provided as other structures limiting the activity angle of the main clamp 300, which can be selected according to the requirements during the actual arrangement.

[0070] Similarly, in an embodiment of the present application, the linear guide structure 400 can be provided with only one; in another embodiment of the present application, the linear guide structure 400 can be provided with a plurality of linear guide structures 400, which are arranged on the rack 200 at intervals, and the present application does not limit this.

[0071] In addition, in the present application, the iron roughneck clamp body device 1000 also includes a secondary clamp, the secondary clamp is arranged on the rack 200 and is arranged at intervals with the iron roughneck clamp body floating device 100.

[0072] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A floating device for a drill tong, characterized in that, The floating device for the iron drill tongs has a first oil passage and a second oil passage, with the end of the second oil passage connected to the first oil passage. The floating device for the iron drill tongs includes: The oil supply assembly includes an oil supply tank and a switching structure. The oil supply tank is connected to one end of the first oil passage, and the switching structure is disposed in the oil supply tank to switch the flow direction of the hydraulic oil in the first oil passage. A hydraulic mechanism includes a cylinder and a lifting structure. The inner cavity of the cylinder is connected to the other end of the first oil passage. The lifting structure is slidably installed in the inner cavity of the cylinder along a first direction and is partially exposed in the cylinder. The portion of the lifting structure exposed in the cylinder is used to connect to the main clamp and drive the main clamp to move along the first direction. An accumulator is provided at the other end of the second oil passage; and; A switching structure is provided on the second oil passage, and the switching structure is used to switch the connection or disconnection between the accumulator and the first oil passage; The lifting structure includes: A sliding portion is slidably installed in the inner cavity of the hydraulic cylinder along a first direction, and the sliding portion and the hydraulic cylinder are movably and sealingly disposed along the first direction. The sliding portion divides the inner cavity of the hydraulic cylinder into a first cavity segment and a second cavity segment, the first cavity segment being connected to the first oil passage; and, A transmission rod, one end of which is inserted into the second cavity and connected to the sliding part, and the other end of which is used to drive the main clamp to move along the first direction; The on / off structure includes an on / off valve, which has a first valve port and a second valve port. The first valve port is connected to the first oil passage, and the second valve port is connected to the accumulator. The on / off valve has a first state and a second state. In the first state, the first valve port and the second valve port are connected, and in the second state, the first valve port and the second valve port are disconnected. The on / off valve is capable of switching between the first state and the second state; The lifting structure includes 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 together along the first direction to divide the inner cavity of the oil cylinder into a first cavity segment and a second cavity segment that are independent of each other. The floating device for the iron drill tongs also has a third oil passage, one end of which is connected to the second cavity section and the other end is connected to the oil supply tank; The floating device for the iron drill pliers also includes a stabilizing oil tank; The on / off valve further includes a first drive port and a second drive port. The first drive port is connected to the third oil passage, and the second drive port is connected to the oil stabilizing 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.

2. The floating device for the iron drill tongs as described in claim 1, characterized in that, The floating device for the iron drill tongs also has a third oil passage, which connects the second cavity 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.

3. The floating device for the iron drill tongs as described in claim 2, characterized in that, The switching structure includes a reversing valve having at least two valve ports, the two valve ports of which are respectively connected to the first oil passage and the second oil passage.

4. The floating device for the iron drill tongs as described in claim 2, characterized in that, The hydraulic mechanism is provided in multiple intervals, among which: The first oil passage includes a first branch and a plurality of second branches, one end of each of the plurality of second branches being connected to one end of the first branch, and the other end being connected to a plurality of the first cavity sections respectively; 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 connected to multiple second chambers respectively. The other end of the third branch is connected to the oil supply tank.

5. The floating device for the iron drill tongs as described in claim 4, characterized in that, The floating device for the iron drill tongs also includes a balance valve, which is located on the first branch.

6. A tool for a drill pliers, characterized in that, include: frame; A floating device for the iron drill pliers is provided on the frame, and the floating device for the iron drill pliers includes the floating device for the iron drill pliers as described in any one of claims 1 to 5. as well as, The main clamp is connected to the lifting structure of the floating device of the iron drill clamp body, so as to move with the lifting structure in a first direction.

7. The iron drill pliers device as described in claim 6, characterized in that, The frame is also provided with a linear guide structure, which is connected to the main clamp to restrict the movement of the main clamp in a first direction.

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