WO2023020340A1 - 集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳 - Google Patents

集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳 Download PDF

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Publication number
WO2023020340A1
WO2023020340A1 PCT/CN2022/111319 CN2022111319W WO2023020340A1 WO 2023020340 A1 WO2023020340 A1 WO 2023020340A1 CN 2022111319 W CN2022111319 W CN 2022111319W WO 2023020340 A1 WO2023020340 A1 WO 2023020340A1
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Prior art keywords
port
oil
valve
hydraulic
hydraulic cylinder
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PCT/CN2022/111319
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English (en)
French (fr)
Inventor
韩家威
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安百拓（南京）建筑矿山设备有限公司
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Publication of WO2023020340A1 publication Critical patent/WO2023020340A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/18—Connecting or disconnecting drill bit and drilling pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members

Definitions

  • the invention belongs to the technical field of engineering machinery, and in particular relates to an integrated control valve, a hydraulic system of an automatic rod unloading tong of a roller cone drilling machine, and a rod unloading tong.
  • Roller cone drilling rigs are used in blast hole drilling operations in large open-pit mines. Different mining areas have different requirements for drilling depth, and the size of the drill pipe is usually standard, and the length of a single drill pipe is fixed, so it is difficult to adapt to various working conditions. In order to meet different drilling depth requirements, roller cone drilling rigs are generally equipped with a rod storage device for storing several drill rods. When drilling, the operator will install multiple drill pipes on the power head in sequence according to the requirements.
  • the drilling machine After drilling a hole, the drilling machine will move to the next hole position to continue drilling. Therefore, it is necessary to disassemble the upper drilling rods successively, put them back into the rod storage device, and then use the power head to lift the last drilling rod from the hole to the height above the ground, and then the drilling rig can be moved. During the drilling process, the threads between the two drill rods become tighter and tighter as the power head rotates. Therefore, when dismounting the drill pipe, the torque of the power head alone cannot be unloaded the drill pipe smoothly sometimes. Therefore, the roller cone drilling rig is generally equipped with an additional rod unloading tongs to assist in unloading the rod.
  • the automatic rod unloading tong is a commonly used structure of the roller cone drilling machine, which is easy to operate and saves time and effort.
  • Fig. 1 shows a kind of automatic rod unloading tongs involved by the applicant, which realizes the rod unloading operation through three hydraulic cylinders, which are swing hydraulic cylinder 300, clamping hydraulic cylinder 301 and rotary hydraulic cylinder 302 respectively.
  • the swing hydraulic cylinder is used to swing the whole structure of the rod unloading tongs to the vicinity of the drill pipe
  • the clamping hydraulic cylinder is used to clamp the upper part of the drill pipe to be unloaded
  • the rotary hydraulic cylinder is used to output the rotating torque to move the drill pipe to be unloaded from the lower part.
  • the top thread of the drill pipe is released.
  • the present invention aims at the problem that the existing automatic rod unloading tongs lack a stable and reliable hydraulic system.
  • First, it provides an integrated control valve, which is applied to the hydraulic system of the automatic rod unloading tongs.
  • the hydraulic system of the automatic rod unloading tong realizes the stable and reliable hydraulic control of the automatic rod unloading tong; and further provides an automatic rod unloading tong so as to realize the rapid rod change of the roller cone drilling machine.
  • the present invention provides an integrated control valve, including a valve body, the valve body is provided with a first oil inlet, a second oil inlet, a first oil return port, a second oil return port, The first working oil port, the second working oil port, the third working oil port, the fourth working oil port, the fifth working oil port and the sixth working oil port;
  • the valve body is provided with a first hydraulic lock and a second hydraulic lock.
  • the V1 port of the first hydraulic lock is connected to the first oil inlet, the V2 port is connected to the first oil return port, and the C1 port is connected to the first working port. Oil port connection, C2 port is connected with the second working oil port;
  • the V1 port of the second hydraulic lock is connected to the second oil inlet, the V2 port is connected to the second oil return port, the C1 port is respectively connected to the third working oil port and the fifth working oil port, and the C2 port is connected to the fourth working oil port respectively.
  • the working oil port is connected with the sixth working oil port;
  • a sequence valve and a one-way valve are arranged on the oil circuit from the C1 port of the second hydraulic lock to the sixth working oil port, and the one-way valve and the sequence valve are connected in parallel;
  • a throttling valve is arranged on the oil passage from the C2 port of the first hydraulic lock to the second working oil port.
  • the integrated control valve When the integrated control valve is applied to the hydraulic system of the existing automatic rod unloading tongs of the roller cone drilling rig, stable and reliable hydraulic control of the automatic rod unloading tongs can be realized.
  • the first hydraulic lock is used to lock the swing hydraulic cylinder, so as to keep the swing position of the automatic rod unloading tongs from moving, thereby preventing the swing of the unloading rod tongs After reaching the rod unloading position, it moves, causing the clamping cylinder to fail to clamp the drill pipe, and the rod unloading fails; and prevents the automatic rod unloading tong from swinging freely when it is not working, resulting in safety accidents.
  • the second hydraulic lock can move the positions of the two hydraulic cylinders after the clamping hydraulic cylinder and the rotating hydraulic cylinder are stretched out in place, preventing the hydraulic cylinders from moving freely and causing personnel to be injured.
  • the sequential actions of the clamping hydraulic cylinder and the rotating hydraulic cylinder when extending out are realized through the sequence valve.
  • the throttle valve can be used to increase the resistance when the swing hydraulic cylinder stretches, so as to avoid excessive speed and shaking during the swing process of the automatic rod unloading tongs. Thereby, the hydraulic system of the automatic rod unloading tongs is guaranteed to be stable and reliable.
  • valve body is also provided with a first relief valve, the inlet of the first relief valve is connected to the first oil inlet, and the outlet is connected to the first oil return port.
  • the maximum output force of the swing hydraulic cylinder is limited by the first overflow valve to prevent damage to the swing hydraulic cylinder itself and the structural parts of the automatic rod unloading tongs.
  • valve body is also provided with a second relief valve, the inlet of the second relief valve is connected to the second oil inlet, and the outlet is connected to the second oil return port. Drain the oil through the second overflow valve to limit the maximum output force of the clamping hydraulic cylinder and the rotating hydraulic cylinder, so as to prevent damage to the clamping hydraulic cylinder, the rotating hydraulic cylinder itself and the structural parts of the automatic rod unloading tongs.
  • oil drain port of the sequence valve is connected with the C2 port of the second hydraulic lock.
  • valve body is also provided with a third oil return port, and the oil drain port of the sequence valve is connected with the third oil return port.
  • the present invention also provides a hydraulic system for automatic rod unloading tongs of a roller cone drilling rig, including: a first reversing valve, a second reversing valve, a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, Control handle, integrated control valve according to any one of claims 1-5, pressure oil source, oil tank;
  • the P port of the first reversing valve is connected to the pressure oil source, the T port is connected to the oil tank, the A port is connected to the first oil inlet port of the integrated control valve, the B port is connected to the first oil return port, and the first reversing valve’s
  • the right electromagnet b is connected to the upper control position of the control handle, and the left electromagnet a of the first reversing valve is connected to the lower control position of the control handle;
  • the P port of the second reversing valve is connected to the pressure oil source, the T port is connected to the oil tank, the A port is connected to the second oil inlet port of the integrated control valve, the B port is connected to the second oil return port, and the second reversing valve’s
  • the right electromagnet b is connected to the right control position of the control handle, and the left electromagnet a of the second reversing valve is connected to the left control position of the control handle;
  • the rod chamber of the first hydraulic cylinder is connected to the first working oil port of the integrated control valve, and the rodless chamber is connected to the second working oil port;
  • the rod chamber of the second hydraulic cylinder is connected to the third working oil port of the integrated control valve , the rodless chamber is connected to the fourth working oil port;
  • the rod chamber of the third hydraulic cylinder is connected to the fifth working oil port of the integrated control valve, and the rodless chamber is connected to the sixth working oil port.
  • the hydraulic system is controlled by a control handle, which realizes stable and reliable hydraulic control of the existing automatic rod unloading tongs, so that the roller cone drilling machine can quickly unload the rod, and all are controlled by hydraulic pressure, which reduces the number of operators danger.
  • the efficiency of rod unloading is improved, the risk of rod unloading is reduced, and time and effort are saved.
  • first reversing valve and the second reversing valve are both three-position four-way Y-type proportional directional valves, so that the movement speed of the rod unloading tongs can be adjusted freely according to requirements, and it is more stable, safe and reduces impact .
  • the electromagnet a on the left side of the control handle is operated downwards to be energized, the P port and the B port are connected, the hydraulic oil enters the rod chamber of the first hydraulic cylinder through the first hydraulic lock, and the first hydraulic cylinder retracts to automatically unload the rod.
  • the clamp swings to the non-working position;
  • the electromagnet b on the right side of the second reversing valve is energized, the P port and the A port are connected, the hydraulic oil enters the rodless chamber of the second hydraulic cylinder through the second hydraulic lock, and the second hydraulic cylinder extends
  • the pressure of the hydraulic oil from the second oil inlet to the third working oil port of the integrated control valve will further increase, the sequence valve will be opened, the hydraulic oil will enter the rodless chamber of the third hydraulic cylinder, and the third hydraulic pressure will be pushed
  • the cylinder is stretched out, so that the rotating tongs will unload the drill pipe to be unloaded;
  • the left electromagnet a of the second reversing valve is energized, the P port and the B port are connected, and the hydraulic oil enters the rod chambers of the second hydraulic cylinder and the third hydraulic cylinder respectively through the second hydraulic lock , the two hydraulic cylinders retract at the same time, driving the jaws away from the unloaded drill pipe.
  • the present invention also provides an automatic rod unloading tong for a roller cone drilling rig, which utilizes the hydraulic system provided in the embodiment for hydraulic control.
  • the rod unloading pliers can be used to quickly unload the rod of the roller cone drilling machine.
  • the present invention provides a new hydraulic system and corresponding integrated control valve for the existing automatic rod unloading tongs, and realizes stable and reliable hydraulic control of the automatic rod unloading tongs, thereby
  • the roller cone drilling rig can unload the rod quickly, which improves the efficiency of unloading the rod, reduces the risk of unloading the rod, and saves time and effort.
  • Fig. 1 is the structural representation of the automatic rod unloading pliers that the embodiment of the present invention is aimed at;
  • Fig. 2 is a schematic diagram of an integrated control valve in an embodiment of the present invention.
  • Fig. 3 is the schematic diagram of another kind of integrated control valve in the embodiment of the present invention.
  • Fig. 4 is a schematic diagram of a hydraulic system of an automatic rod unloading tong in an embodiment of the present invention.
  • valve body 101, the first oil inlet; 102, the second oil inlet; 103, the first oil return port; 104, the second oil return port; 105, the first working oil port; 106 , the second working oil port; 107, the third working oil port; 108, the fourth working oil port; 109, the fifth working oil port; 110, the sixth working oil port; 111, the first hydraulic lock; 112, the second Hydraulic lock; 113, sequence valve; 114, one-way valve; 115, throttle valve; 116, first overflow valve; 117, second overflow valve; 118, third oil return port;
  • 300 a swing hydraulic cylinder; 301, a clamping hydraulic cylinder; 302, a rotating hydraulic cylinder.
  • Figure 2 shows a schematic diagram of the integrated control valve in one embodiment of the present invention.
  • the integrated control valve includes a valve body 100, and the valve body 100 is provided with a first oil inlet 101, a second oil inlet 102, a first oil return port 103, a second Second oil return port 104, first working oil port 105, second working oil port 106, third working oil port 107, fourth working oil port 108, fifth working oil port 109, sixth working oil port 110.
  • the valve body 100 is provided with a first hydraulic lock 111 and a second hydraulic lock 112.
  • the V1 port of the first hydraulic lock 111 is connected to the first oil inlet 101, the V2 port is connected to the first oil return port 103, and the C1 port is connected to the first oil return port 103.
  • One working oil port 105 is connected, and the C2 port is connected with the second working oil port 106 .
  • the V1 port of the second hydraulic lock 112 is connected to the second oil inlet port 102, the V2 port is connected to the second oil return port 104, the C1 port is respectively connected to the third working oil port 107 and the fifth working oil port 109, and the C2 port is respectively It is connected with the fourth working oil port 108 and the sixth working oil port 110 .
  • a sequence valve 113 and a one-way valve 114 are arranged on the oil path from the C1 port of the second hydraulic lock 112 to the sixth working oil port 110, and the one-way valve 114 is connected in parallel with the sequence valve 113; more specifically, it is the inlet of the one-way valve 114 It is connected with the sixth working oil port 110 , and the outlet is connected with the C1 port of the second hydraulic lock 112 .
  • a throttle valve 115 is provided on the oil passage from the C2 port of the first hydraulic lock 111 to the second working oil port 106 .
  • the integrated control valve offered works as follows:
  • the first working oil port 105 is connected to the rodless chamber of the swing hydraulic cylinder, and the second working oil port 106 is connected to the rod of the swing hydraulic cylinder.
  • Cavity connection; the third working oil port 107 is connected with the rodless cavity of the clamping hydraulic cylinder, the fourth working oil port 108 is connected with the rodless cavity of the clamping hydraulic cylinder; the fifth working oil port 109 is connected with the rodless cavity of the rotating hydraulic cylinder cavity, and the sixth working oil port 110 is connected with the rod cavity of the rotary hydraulic cylinder.
  • the first oil inlet 101 can be connected to the pressure oil source through the reversing valve, the first oil return port 103 can be connected to the oil tank through the reversing valve; the second oil inlet 102 can be connected to the pressure oil source through the reversing valve, the second The second oil return port 104 can be connected with the oil tank through a reversing valve.
  • the hydraulic oil entering from the first oil inlet 101 enters the rodless chamber of the swing hydraulic cylinder through the first hydraulic lock 111, and the swing hydraulic cylinder stretches out to swing the automatic rod unloading tongs to the vicinity of the drill pipe to be unloaded;
  • the hydraulic oil is fed from the first oil return port 103, the hydraulic oil enters the rod cavity of the swing hydraulic cylinder through the first hydraulic lock 111, and the swing hydraulic cylinder retracts to make the automatic rod unloading tongs swing to the non-working position.
  • the hydraulic oil When the hydraulic oil is introduced from the second oil inlet 102, the hydraulic oil enters the rodless chamber of the clamping hydraulic cylinder through the second hydraulic lock 112, pushes the clamping hydraulic cylinder to extend, and pushes the jaws of the rod unloading pliers to clamp Drill pipe to be unloaded; then the hydraulic oil pressure in the oil circuit from the second oil inlet 102 to the sixth working oil port 110 is further increased, because the inlet of the check valve 114 is connected to the sixth working oil port 110, and the outlet is connected to the sixth working oil port 110.
  • the C1 port of the two hydraulic locks 112 is connected, so the hydraulic oil will not pass through the one-way valve 114, so that the sequence valve 113 is opened, and the hydraulic oil enters the rodless chamber of the rotating hydraulic cylinder, pushing the rotating hydraulic cylinder to extend, thereby rotating the unloading cylinder.
  • the jaws of the rod tongs unload the drill pipe to be unloaded.
  • the first hydraulic lock is used to lock the swing hydraulic cylinder, so as to keep the swing position of the automatic rod unloading tongs from moving. It has two functions: 1) Prevent the rod unloading tongs from moving after swinging to the unloading position , causing the clamping cylinder to fail to clamp the drill pipe and fail to unload the rod; 2) prevent the automatic unloading tongs from swinging freely when not working, resulting in safety accidents.
  • the second hydraulic lock 112 is provided to move the position of the two hydraulic cylinders after the clamping hydraulic cylinder and the rotating hydraulic cylinder are stretched out to prevent the hydraulic cylinders from moving freely and causing injury to personnel.
  • the throttle valve 115 can increase the resistance when the swing hydraulic cylinder stretches, so as to avoid excessive speed and shaking during the swing process of the automatic rod unloading tongs.
  • the valve body 100 is also provided with a first relief valve 116, the inlet of the first relief valve 116 is connected to the first oil inlet 101, and the outlet is connected to the first oil return port 103 connect.
  • first relief valve 116 By setting the first relief valve 116, when the pressure in the oil circuit of the swing hydraulic cylinder exceeds the rated pressure of the first relief valve 116, the oil will be drained through the first relief valve 116, thereby limiting the maximum output of the swing hydraulic cylinder force to prevent damage to the swing hydraulic cylinder itself and the structural parts of the automatic rod unloading tongs.
  • a second relief valve 117 is also provided in the valve body 100 , the inlet of the second relief valve ( 117 ) is connected to the second oil inlet 102 , and the outlet is connected to the second oil return port 104 .
  • the second relief valve 117 when the pressure in the oil circuit of the clamping hydraulic cylinder and the rotating hydraulic cylinder exceeds the rated pressure of the second relief valve 117, the oil is drained through the second relief valve 117, Thereby limiting the maximum output force of the clamping hydraulic cylinder and the rotating hydraulic cylinder, in order to prevent damage to the structural parts of the clamping hydraulic cylinder, the rotating hydraulic cylinder itself and the automatic unloading tongs.
  • the oil drain port of the sequence valve 113 is connected with the C2 port of the second hydraulic lock 112 .
  • the sequence valve 113 can directly drain oil to the oil tank through the second hydraulic lock 112 , and in this way, pipeline connections can be reduced and the structure can be simplified.
  • a third oil return port 118 may be provided on the valve body 100 , and the oil drain port of the sequence valve 113 is connected to the third oil return port 118 . At this time, the third oil return port 118 can be directly connected to the oil tank, and then the oil drain from the sequence valve 113 directly enters the oil tank.
  • a hydraulic system of automatic rod unloading tongs for a roller cone drilling rig is provided.
  • the hydraulic system includes: a first reversing valve 200, a second reversing valve 201, a first hydraulic cylinder 205, a second hydraulic cylinder 206, a third hydraulic cylinder 207, a control handle 204, an integrated control valve , pressure oil source 202, oil tank 203;
  • the P port of the first reversing valve 200 is connected to the pressure oil source 202, the T port is connected to the oil tank 203, the A port is connected to the first oil inlet 101 of the integrated control valve, the B port is connected to the first oil return port 103, and the second
  • the electromagnet b of a reversing valve 200 is connected with the upper control position 208 of the control handle 204 , and the electromagnet a of the first reversing valve 200 is connected with the lower control position 209 of the control handle 204 .
  • the P port of the second reversing valve 201 is connected to the pressure oil source 202, the T port is connected to the oil tank 203, the A port is connected to the second oil inlet port 102 of the integrated control valve, the B port is connected to the second oil return port 104, and the second oil return port 104 is connected to the B port.
  • the electromagnet b of the second reversing valve 201 is connected with the right control position 211 of the control handle 204 , and the electromagnet a of the second reversing valve 201 is connected with the left control position 210 of the control handle 204 .
  • the rod cavity of the first hydraulic cylinder 205 is connected to the first working oil port 105 of the integrated control valve, and the rodless cavity is connected to the second working oil port 106; the rod cavity of the second hydraulic cylinder 206 is connected to the third working oil port of the integrated control valve.
  • the working oil port 107 is connected, and the rodless chamber is connected with the fourth working oil port 108; the rod chamber of the third hydraulic cylinder 207 is connected with the fifth working oil port 109 of the integrated control valve, and the rodless chamber is connected with the sixth working oil port 110 connect.
  • the first hydraulic cylinder 205 is the swing hydraulic cylinder of the unloading tongs
  • the second hydraulic cylinder 206 is the clamping hydraulic cylinder
  • the third hydraulic cylinder 207 is the rotating hydraulic cylinder.
  • the hydraulic system is controlled by a control handle 204, which realizes stable and reliable hydraulic control of the existing automatic rod unloading tongs, so that the roller cone drilling machine can quickly unload the rod, and all of them are controlled by hydraulic pressure, requiring less operation danger to personnel.
  • the efficiency of rod unloading is improved, the risk of rod unloading is reduced, and time and effort are saved.
  • the first reversing valve 200 and the second reversing valve 201 are both three-position four-way Y-type proportional directional valves, so that the movement speed of the rod unloading tongs can be freely adjusted according to demand. , it can be more stable and safe, and reduce the impact.
  • the left electromagnet a of the second reversing valve 201 is energized.
  • the hydraulic lock 112 enters the rod cavity of the second hydraulic cylinder 206 and the third hydraulic cylinder 207 respectively, and the two hydraulic cylinders retract simultaneously, driving the jaws to leave the unloaded drill pipe.
  • the hydraulic system of the automatic rod unloading tongs of the present invention not only meets the hydraulic control requirements of the automatic rod unloading tongs, but also uses the proposed integrated control valve, which is more stable, reliable, and highly integrated, and is operated by a control handle 204. More convenient.
  • a rod unloading tong of a roller cone drilling machine is also provided, to be precise, an automatic rod unloading tong, which utilizes the proposed hydraulic system to perform When unloading the rod, it is stable and reliable, so that the roller cone drill can unload the rod quickly.

Abstract

本发明公开了一种集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳，属于工程机械技术领域。本发明的集成控制阀包括阀体，阀体上设置有第一进油口、第二进油口、第一回油口、第二回油口、第一工作油口、第二工作油口、第三工作油口、第四工作油口、第五工作油口、第六工作油口；阀体中设置有第一液压锁、第二液压锁、顺序阀和单向阀和节流阀，并且在实施例中阀体中还设置有第一溢流阀、第二溢流阀。并且，利用所述的集成控制阀，给出了卸杆钳液压系统的结构；同时基于所提出的液压系统，提供了一种卸杆钳。利用本发明，实现了牙轮钻机的自动卸杆钳的液压控制，稳定可靠，使得牙轮钻机能够快速卸杆。

Description

集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳 技术领域
本发明属于工程机械技术领域，具体涉及一种集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳。
背景技术
牙轮钻机应用于大型露天矿的爆破孔钻孔作业。不同矿区对钻孔深度有着不同的要求，而钻杆尺寸通常是标准的，单根钻杆的长度是一定的，很难适应各种工况。为了满足不同的钻孔深度要求，牙轮钻机一般都配有一个储杆器，用于储存若干根钻杆。钻孔时，操作手会根据需求，在动力头上依次安装多根钻杆。
在钻完一个孔之后，钻机要移动至下一个孔位继续钻孔。因此，需要将处于上部的钻杆依次拆卸下来，放回储杆器，然后用动力头将最后一根钻杆从孔中提至地面以上高度，此时才能移动钻机。在钻孔过程中，两根钻杆之间的螺纹随着动力头的旋转越来越紧。因此，在拆卸钻杆时，单靠动力头的扭矩有时无法顺利地将钻杆卸开。所以，牙轮钻机一般都配备一个额外的卸杆钳，用于辅助卸杆。
自动卸杆钳是一种常用的牙轮钻机的结构，操作方便，省时省力。图1示出了申请人所涉及的一种自动卸杆钳，该自动卸杆钳通过三个液压缸实现卸杆操作，分别是摆动液压缸300、夹紧液压缸301和旋转液压缸302。摆动液压缸用于将卸杆钳整体结构摆动至钻杆附近，夹紧液压缸用于将钳嘴夹住上部待卸的钻杆，旋转液压缸用于输出旋转扭矩将待卸钻杆从下部钻杆的顶部螺纹处卸开。
然而，对于该自动卸杆钳，缺少一个稳定可靠的液压系统，实现其液压控制。
发明内容
技术问题：本发明针对现有的自动卸杆钳缺少稳定可靠的液压系统的问题，首先提供一种集成控制阀，将该集成控制阀应用与自动卸杆钳的液压系统中，提出了用于自动卸杆钳的液压系统，从而实现自动卸杆钳的稳定可靠液压控制；并进一步地，提供了一种自动卸杆钳，从而实现牙轮钻机的快速换杆。
技术方案：一方面，本发明提供一种集成控制阀，包括阀体，所述阀体上设置有第一进油口、第二进油口、第一回油口、第二回油口、第一工作油口、第二工作油口、第三工作油口、第四工作油口、第五工作油口、第六工作油口；
所述阀体中设置有第一液压锁、第二液压锁，所述第一液压锁的V1口与第一进油口连接，V2口与第一回油口连接，C1口与第一工作油口连接，C2口与第二工作油口连接；
所述第二液压锁的V1口与第二进油口连接，V2口与第二回油口连接，C1口分别与第三工作油口和第五工作油口连接，C2口分别与第四工作油口和第六工作油口连接；
所述第二液压锁的C1口至第六工作油口的油路上设置有顺序阀和单向阀，所述单向阀与顺序阀并联；
所述第一液压锁的C2口至第二工作油口的油路上设置有节流阀。
将该集成控制阀应用于现有的牙轮钻机的自动卸杆钳的液压系统中时，可实现自动卸杆钳稳定可靠的液压控制。利用该集成控制阀，在工作时，当摆动液压缸伸出到位后，利用第一液压锁用于锁住摆动液压缸，从而保持自动卸杆钳的摆动位置不移动，从而防止卸杆钳摆动到卸杆位置后发生移动，导致夹紧油缸夹不到钻杆，卸杆失败；以及防止自动卸杆钳在不工作的时候自由摆动，导致安全事故。同样，第二液压锁可以在夹紧液压缸和转动液压缸伸出到位后，将两个液压缸的位置所动，防止液压缸自由运动，致使人员收到伤害。并且，通过顺序阀实现了夹紧液压缸和转动液压缸在伸出时的依次动作。利用节流阀可以增加摆动液压缸伸缩时的阻力，避免自动卸杆钳摆动过程中速度过快、出现晃动。从而，保证了自动卸杆钳的液压系统稳定可靠。
进一步的，所述阀体中还设置有第一溢流阀，所述第一溢流阀的进口与第一进油口连接，出口与第一回油口连接。通过第一溢流阀限制摆动液压缸的最大输出力，以防对摆动液压缸自身和自动卸杆钳的结构件造成伤害。
进一步的，所述阀体中还设置有第二溢流阀，所述第二溢流阀的进口与第二进油口连接，出口与第二回油口连接。通过第二溢流阀进行泄油限制夹紧液压缸和转动液压缸的最大输出力，以防对夹紧液压缸和转动液压缸自身及自动卸杆钳的结构件造成伤害。
进一步地，所述顺序阀的泄油口与第二液压锁的C2口连接。
进一步地，所述阀体上还设置有第三回油口，所述顺序阀的泄油口与第三回油口连接。
通过上述两种方式，实现了顺序阀的泄油。
另一方面，本发明还提供一种牙轮钻机的自动卸杆钳液压系统，包括：第一换向阀、第二换向阀、第一液压缸、第二液压缸、第三液压缸、控制手柄、权利要求1-5任一项所述的集成控制阀、压力油源、油箱；
第一换向阀的P口与压力油源连接，T口与油箱连接，A口与集成控制阀的第一进油口连接，B口与第一回油口连接，第一换向阀的右侧电磁铁b连接与控制手柄的上控制位连接，第一换向阀的左侧电磁铁a连接与控制手柄的下控制位连接；
第二换向阀的P口与压力油源连接，T口与油箱连接，A口与集成控制阀的第二进油口连接，B口与第二回油口连接，第二换向阀的右侧电磁铁b连接与控制手柄的右控制位连接，第二换向阀的左侧电磁铁a连接与控制手柄的左控制位连接；
第一液压缸的有杆腔与集成控制阀的第一工作油口连接，无杆腔与第二工作油口连接；第二液压缸的有杆腔与集成控制阀的第三工作油口连接，无杆腔与第四工作油口连接；第三液压缸的有杆腔与集成控制阀的第五工作油口连接，无杆腔与第六工作油口连接。
该液压系统，利用一个控制手柄进行操控，实现了对现有的自动卸杆钳的稳定可靠的液压控制，从而让牙轮钻机实现快速卸杆，而且均是通过液压控制，较少了操作人员的危险。提高了卸杆效率，降低了卸杆危险，省时省力。
进一步地，所述第一换向阀和第二换向阀均为三位四通Y型比例方向阀，从而使得卸杆钳的运动速度可根据需求自由调节，并且更加平稳、安全，减少冲击。
进一步地，利用所述液压系统驱动卸杆钳进行卸杆时：
向上操作控制手柄，第一换向阀的右侧电磁铁b得电，P口和A口导通，液压油经过第一液压锁进入第一液压缸的无杆腔，第一液压缸伸出，使自动卸杆钳摆动至待卸钻杆附近；
向下操作控制手柄的左侧电磁铁a得电，P口和B口导通，液压油经过第一液压锁进入第一液压缸的有杆腔，第一液压缸缩回，使自动卸杆钳摆动至非工作位置；
向右操作控制手柄，第二换向阀的右侧电磁铁b得电，P口和A口导通，液压油经过第二液压锁进入第二液压缸的无杆腔，第二液压缸伸出；继续通液压油，集成控制阀的第二进油口至第三工作油口的液压油压力进一步升高，打开顺序阀，液压油进入第三液压缸的无杆腔，推动第三液压缸伸出，使得旋转钳嘴将待卸钻杆卸开；
向左操作控制手柄，第二换向阀的左侧电磁铁a得电，P口和B口导通，液压油经过第二液压锁分别进入第二液压缸和第三液压缸的有杆腔，两个液压缸同时缩回，带动钳嘴离开被卸钻杆。
通过上述方式，实现牙轮钻机的快速卸杆，并且效率高、危险性低、省时省力。
同时，本发明还提供一种牙轮钻机自动卸杆钳，利用了实施例中所提供的液压系统 进行液压控制。利用该卸杆钳，实现牙轮钻机的快速卸杆。
综上，本发明与现有技术相比，提供了一种针对现有的自动卸杆钳的新的液压系统及相应的集成控制阀，实现了自动卸杆钳的稳定可靠的液压控制，从而使得牙轮钻机能够快速卸杆，提高了卸杆效率，降低了卸杆危险，省时省力。
附图说明
图1为本发明的实施例所针对的自动卸杆钳的结构示意图；
图2为本发明的实施例中一种集成控制阀的原理图；
图3为本发明的实施例中另一种集成控制阀的原理图；
图4为本发明的实施例中一种自动卸杆钳的液压系统的原理图。
图中有：100、阀体；101、第一进油口；102、第二进油口；103、第一回油口；104、第二回油口；105、第一工作油口；106、第二工作油口；107、第三工作油口；108、第四工作油口；109、第五工作油口；110、第六工作油口；111、第一液压锁；112、第二液压锁；113、顺序阀；114、单向阀；115、节流阀；116、第一溢流阀；117、第二溢流阀；118、第三回油口；
200、第一换向阀；201、第二换向阀；202、压力油源；203、油箱；204、控制手柄204；205、第一液压缸；206、第二液压缸；207、第三液压缸；208、上控制位；209、下控制位；210、左控制位；211、右控制位；
300、摆动液压缸；301、夹紧液压缸；302、转动液压缸。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
并且，对于术语“第一”、“第二”等仅是为了便于描述，并不能理解为对数量等的限制。
图2示出了本发明的一个实施例中的集成控制阀的原理图。结合图2，本发明的一个实施例中，集成控制阀包括阀体100，所述阀体100上设置有第一进油口101、第二 进油口102、第一回油口103、第二回油口104、第一工作油口105、第二工作油口106、第三工作油口107、第四工作油口108、第五工作油口109、第六工作油口110。阀体100中设置有第一液压锁111、第二液压锁112，第一液压锁111的V1口与第一进油口101连接，V2口与第一回油口103连接，C1口与第一工作油口105连接，C2口与第二工作油口106连接。第二液压锁112的V1口与第二进油口102连接，V2口与第二回油口104连接，C1口分别与第三工作油口107和第五工作油口109连接，C2口分别与第四工作油口108和第六工作油口110连接。第二液压锁112的C1口至第六工作油口110的油路上设置有顺序阀113和单向阀114，单向阀114与顺序阀113并联；更具体的，是单向阀114的进口与第六工作油口110连接，出口与第二液压锁112的C1口连接。第一液压锁111的C2口至第二工作油口106的油路上设置有节流阀115。
所提供的集成控制阀的工作原理如下：
在将集成控制阀应用于牙轮钻机的自动卸杆钳的液压系统中时，第一工作油口105与摆动液压缸的无杆腔连接，第二工作油口106与摆动液压缸的有杆腔连接；第三工作油口107与夹紧液压缸的无杆腔连接，第四工作油口108与夹紧液压缸的有杆腔连接；第五工作油口109与转动液压缸的无杆腔连接，第六工作油口110与转动液压缸的有杆腔连接。
第一进油口101可通过换向阀与压力油源连接，第一回油口103可通过换向阀与油箱连接；第二进油口102可通过换向阀与压力油源连接，第二回油口104可通过换向阀与油箱连接。在工作时，从第一进油口101进入的液压油通过第一液压锁111进入摆动液压缸的无杆腔，摆动液压缸伸出，可以将自动卸杆钳摆动至待卸钻杆附近；当从第一回油口103通入液压油时，液压油经过第一液压锁111进入摆动液压缸的有杆腔，摆动液压缸缩回，使自动卸杆钳摆动至非工作位置。
当从第二进油口102通入液压油时，液压油进过第二液压锁112进入夹紧液压缸的无杆腔，推动夹紧液压缸伸出，推动卸杆钳的钳嘴夹住待卸钻杆；然后第二进油口102至第六工作油口110的油路中液压油压力进一步升高，因为由于单向阀114的进口与第六工作油口110连接，出口与第二液压锁112的C1口连接，因此液压油不会从单向阀114中通过，从而使得顺序阀113打开，液压油进入转动液压缸的无杆腔，推动转动液压缸伸出，从而旋转卸杆钳的钳嘴将待卸钻杆卸开。
当从第二回油口104通入液压油时，液压油经过第二液压锁112分别进入夹紧液压缸和转动液压缸的有杆腔，夹紧液压缸和转动液压缸同时缩回，带动钳嘴离开被卸钻杆。 在集成控制阀中，第一液压锁用于锁住摆动液压缸，从而保持自动卸杆钳的摆动位置不移动，其作用有两个：1)防止卸杆钳摆动到卸杆位置后发生移动，导致夹紧油缸夹不到钻杆，卸杆失败；2)防止自动卸杆钳在不工作的时候自由摆动，导致安全事故。
同样，设置第二液压锁112，可以在夹紧液压缸和转动液压缸伸出到位后，将两个液压缸的位置所动，防止液压缸自由运动，致使人员收到伤害。
同时通过顺序阀113，实现了夹紧液压缸和转动液压缸在伸出时的依次动作。在本发明的实施例中，节流阀115可以增加摆动液压缸伸缩时的阻力，避免自动卸杆钳摆动过程中速度过快、出现晃动。
通过上述的集成控制阀，当应用于自动卸杆钳的液压系统中时，在实现卸杆钳的工作目的的同时，也比较稳定可靠。
进一步地，在本发明的实施例中，阀体100中还设置有第一溢流阀116，第一溢流阀116的进口与第一进油口101连接，出口与第一回油口103连接。通过设置第一溢流阀116，当摆动液压缸的油路中，压力超过第一溢流阀116的额定压力时，通过第一溢流阀116进行泄油，从而限制摆动液压缸的最大输出力，以防对摆动液压缸自身和自动卸杆钳的结构件造成伤害。
进一步地，在阀体100中还设置有第二溢流阀117，第二溢流阀(117)的进口与第二进油口102连接，出口与第二回油口104连接。同样道理，通过设置第二溢流阀117，当夹紧液压缸和转动液压缸的油路中，压力超过第二溢流阀117的额定压力时，通过第二溢流阀117进行泄油，从而限制夹紧液压缸和转动液压缸的最大输出力，以防对夹紧液压缸和转动液压缸自身及自动卸杆钳的结构件造成伤害。
在本发明的一个实施例中，顺序阀113的泄油口与第二液压锁112的C2口连接。此时，顺序阀113可以直接通过第二液压锁112泄油到油箱，通过这种形式，可以减少管路连接，使得结构简化。
此外，在本发明的另一种实施例中，如图3所示，可以在阀体100上设置第三回油口118，顺序阀113的泄油口与第三回油口118连接。此时，可以直接将第三回油口118连接油箱，然后顺序阀113的泄油直接进入油箱。
基于本发明的实施例中所提供的集成控制阀，提供了一种牙轮钻机自动卸杆钳液压系统。如图4所示，该液压系统包括：第一换向阀200、第二换向阀201、第一液压缸205、第二液压缸206、第三液压缸207、控制手柄204、集成控制阀、压力油源202、油箱203；
第一换向阀200的P口与压力油源202连接，T口与油箱203连接，A口与集成控制阀的第一进油口101连接，B口与第一回油口103连接，第一换向阀200的电磁铁b连接与控制手柄204的上控制位208连接，第一换向阀200的电磁铁a连接与控制手柄204的下控制位209连接。
第二换向阀201的P口与压力油源202连接，T口与油箱203连接，A口与集成控制阀的第二进油口102连接，B口与第二回油口104连接，第二换向阀201的电磁铁b连接与控制手柄204的右控制位211连接，第二换向阀201的电磁铁a连接与控制手柄204的左控制位210连接。
第一液压缸205的有杆腔与集成控制阀的第一工作油口105连接，无杆腔与第二工作油口106连接；第二液压缸206的有杆腔与集成控制阀的第三工作油口107连接，无杆腔与第四工作油口108连接；第三液压缸207的有杆腔与集成控制阀的第五工作油口109连接，无杆腔与第六工作油口110连接。
在该实施例中，第一液压缸205即为卸杆钳的摆动液压缸，第二液压缸206即为夹紧液压缸，第三液压缸207即为转动液压缸。
该液压系统，利用一个控制手柄204进行操控，实现了对现有的自动卸杆钳的稳定可靠的液压控制，从而让牙轮钻机实现快速卸杆，而且均是通过液压控制，较少了操作人员的危险。提高了卸杆效率，降低了卸杆危险，省时省力。
在本发明的优选实施例中，第一换向阀200和第二换向阀201均为三位四通Y型比例方向阀，使得卸杆钳的运动速度可根据需求自由调节，在换向时，可以更加平稳安全，减少冲击。同时，对于三位四通Y型比例换向阀，在换向阀不动作时，A口和B口均是与T口导通的，因此在液压缸被相应的液压锁锁住的时候，位于液压锁进油侧(V1口和V2口)的液压油不会对液压锁造成影响，从而在液压锁将液压缸锁定时更加稳定可靠，这也进一步地增加了液压系统的可靠性。
下面对利用本发明的实施例中所提供的液压系统控制过程进行说明。
向上操作控制手柄204，第一换向阀200的右侧电磁铁b得电，此时，第一换向阀200工作在右工作位，P口和A口导通，液压油经过第一液压锁111进入第一液压缸205的无杆腔，第一液压缸205伸出，使自动卸杆钳摆动至待卸钻杆附近。
向下操作控制手柄204，第一换向阀200的左侧电磁铁a得电，此时，第一换向阀200工作在左工作位，P口和B口导通，液压油经过第一液压锁111进入第一液压缸205的有杆腔，第一液压缸205缩回，使自动卸杆钳摆动至非工作位置。
向右操作控制手柄204，第二换向阀201的右侧电磁铁b得电，此时，第二换向阀201工作在右工作位，P口和A口导通，液压油经过第二液压锁112进入第二液压缸206的无杆腔，第二液压缸206伸出；继续通液压油，集成控制阀的第二进油口102至第三工作油口107的液压油压力进一步升高，打开顺序阀113，液压油进入第三液压缸207的无杆腔，推动第三液压缸207伸出，使得旋转钳嘴将待卸钻杆卸开。
向左操作控制手柄204，第二换向阀201的左侧电磁铁a得电，此时，第二换向阀201工作在左工作位，P口和B口导通，液压油经过第二液压锁112分别进入第二液压缸206和第三液压缸207的有杆腔，两个液压缸同时缩回，带动钳嘴离开被卸钻杆。
通过上述方式，实现牙轮钻机的快速卸杆，并且效率高、危险性低、省时省力。
本发明的自动卸杆钳液压系统，不仅满足了自动卸杆钳的液压控制需求，而且因为利用了所提出的集成控制阀，更加稳定可靠，集成度高，并且利用一个控制手柄204操作，操作更加方便。
进一步地，在本发明的实施例中，还提供了一种牙轮钻机的卸杆钳，确切的说是一种自动卸杆钳，该自动卸杆钳利用了所提出的液压系统，在进行卸杆操作时，稳定可靠，使得牙轮钻机能够快速卸杆。
本发明的描述是为了示例和描述起见而给出的，而并不是无遗漏的或者将本发明限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显然的。选择和描述实施例是为了更好说明本发明的原理和实际应用，并且使本领域的普通技术人员能够理解本发明从而设计适于特定用途的带有各种修改的各种实施例。

Claims (9)

  1. 一种集成控制阀，包括阀体(100)，其特征在于，所述阀体(100)上设置有第一进油口(101)、第二进油口(102)、第一回油口(103)、第二回油口(104)、第一工作油口(105)、第二工作油口(106)、第三工作油口(107)、第四工作油口(108)、第五工作油口(109)、第六工作油口(110)；
    所述阀体(100)中设置有第一液压锁(111)、第二液压锁(112)，所述第一液压锁(111)的V1口与第一进油口(101)连接，V2口与第一回油口(103)连接，C1口与第一工作油口(105)连接，C2口与第二工作油口(106)连接；
    所述第二液压锁(112)的V1口与第二进油口(102)连接，V2口与第二回油口(104)连接，C1口分别与第三工作油口(107)和第五工作油口(109)连接，C2口分别与第四工作油口(108)和第六工作油口(110)连接；
    所述第二液压锁(112)的C1口至第六工作油口(110)的油路上设置有顺序阀(113)和单向阀(114)，所述单向阀(114)与顺序阀(113)并联；
    所述第一液压锁(111)的C2口至第二工作油口(106)的油路上设置有节流阀(115)。
  2. 根据权利要求1所述的集成控制阀，其特征在于，所述阀体(100)中还设置有第一溢流阀(116)，所述第一溢流阀(116)的进口与第一进油口(101)连接，出口与第一回油口(103)连接。
  3. 根据权利要求2所述的集成控制阀，其特征在于，所述阀体(100)中还设置有第二溢流阀(117)，所述第二溢流阀(117)的进口与第二进油口(102)连接，出口与第二回油口(104)连接。
  4. 根据权利要求1-3任一项所述的集成控制阀，其特征在于，所述顺序阀(113)的泄油口与第二液压锁(112)的C2口连接。
  5. 根据权利要求1-3任一项所述的集成控制阀，其特征在于，所述阀体(100)上还设置有第三回油口(118)，所述顺序阀(113)的泄油口与第三回油口(118)连接。
  6. 一种牙轮钻机的自动卸杆钳液压系统，其特征在于，包括：第一换向阀(200)、第二换向阀(201)、第一液压缸(205)、第二液压缸(206)、第三液压缸(207)、控制手柄(204)、权利要求1-5任一项所述的集成控制阀、压力油源(202)、油箱(203)；
    第一换向阀(200)的P口与压力油源(202)连接，T口与油箱(203)连接，A口与集成控制阀的第一进油口(101)连接，B口与第一回油口(103)连接，第一换向阀(200)的右侧电磁铁b连接与控制手柄(204)的上控制位(208)连接，第一换向阀(200)的左侧电磁铁a连接与控制手柄(204)的下控制位(209)连接；
    第二换向阀(201)的P口与压力油源(202)连接，T口与油箱(203)连接，A口与集成控制阀的第二进油口(102)连接，B口与第二回油口(104)连接，第二换向阀(201)的右侧电磁铁b连接与控制手柄(204)的右控制位(211)连接，第二换向阀(201)的左侧电磁铁a连接与控制手柄(204)的左控制位(210)连接；
    第一液压缸(205)的有杆腔与集成控制阀的第一工作油口(105)连接，无杆腔与第二工作油口(106)连接；第二液压缸(206)的有杆腔与集成控制阀的第三工作油口(107)连接，无杆腔与第四工作油口(108)连接；第三液压缸(207)的有杆腔与集成控制阀的第五工作油口(109)连接，无杆腔与第六工作油口(110)连接。
  7. 根据权利要求6所述的液压系统，其特征在于，所述第一换向阀(200)和第二换向阀(201)均为三位四通Y型比例方向阀。
  8. 根据权利要求6或7所述的液压系统，其特征在于，利用所述液压系统驱动卸杆钳进行卸杆时：
    向上操作控制手柄204，第一换向阀(200)的右侧电磁铁b得电，P口和A口导通，液压油经过第一液压锁(111)进入第一液压缸(205)的无杆腔，第一液压缸(205)伸出，使自动卸杆钳摆动至待卸钻杆附近；
    向下操作控制手柄(204)，第一换向阀(200)的左侧电磁铁a得电，P口和B口导通，液压油经过第一液压锁(111)进入第一液压缸(205)的有杆腔，第一液压缸(205)缩回，使自动卸杆钳摆动至非工作位置；
    向右操作控制手柄(204)，第二换向阀(201)的右侧电磁铁b得电，P口和A口导通，液压油经过第二液压锁(112)进入第二液压缸(206)的无杆腔，第二液压缸(206)伸出；继续通液压油，集成控制阀的第二进油口(102)至第三工作油口(107)的液压油压力进一步升高，打开顺序阀(113)，液压油进入第三液压缸(207)的无杆腔，推动第三液压缸(207)伸出，使得旋转钳嘴将待卸钻杆卸开；
    向左操作控制手柄(204)，第二换向阀(201)的左侧电磁铁a得电，P口和B口导通，液压油经过第二液压锁(112)分别进入第二液压缸(206)和第三液压缸(207)的有杆腔，两个液压缸同时缩回，带动钳嘴离开被卸钻杆。
  9. 一种牙轮钻机的卸杆钳，其特征在于，利用权利要求6-8任一项所述的液压系统进行液压控制。
PCT/CN2022/111319 2021-08-16 2022-08-10 集成控制阀、牙轮钻机的自动卸杆钳液压系统及卸杆钳 WO2023020340A1 (zh)

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