Hydraulic tongs safety operation system

Abstract

The application discloses a hydraulic tongs safety operation system, belongs to the technical field of control, and is used for a hydraulic tongs operation system of manual and electric hybrid control, comprising a hydraulic system and a gas pressure system, wherein the hydraulic system and the gas pressure system are both provided with an electric control module, the hydraulic system comprises an oil supply path and an oil return path, the oil supply path and the oil return path are connected with a transfer oil cylinder through a branch pipe one, a three-position four-way electromagnetic reversing valve one is connected to the branch pipe one, the oil supply path and the oil return path are connected with a swing oil cylinder through a branch pipe two, and a three-position four-way electromagnetic reversing valve two is connected to the branch pipe two; the gas pressure system comprises a gas supply path; the electric control module is provided with a PLC integrated control box and a controller for remotely controlling the PLC integrated control box. The application adopts a remote control operation mode, so that personnel can remotely control the hydraulic tongs, and the control is more convenient and safe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control, in particular to a hydraulic tong safety operation system. BACKGROUND

[0002] Since the use of the drill pipe hydraulic tong, safety accidents have always occurred, and the safety protection of personnel operation has defects. If the operation is improper, it may cause injury, even broken fingers and arms, which brings great safety risk to personnel operation and becomes a risk source that harms personnel safety in drilling construction. However, because the hydraulic tong is irreplaceable in drilling construction, it is urgent to increase its safety protection function in safe operation.

[0003] Therefore, the present application provides a hydraulic tong operation system with high safety performance and manual and electric hybrid control by combining existing control elements and control systems. SUMMARY

[0004] The present application aims to provide a hydraulic tong operation system with high safety performance and manual and electric hybrid control.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a hydraulic tong safety operation system, comprising a hydraulic system and a pneumatic system, the hydraulic system and the pneumatic system both have an electric control module, the hydraulic system comprises an oil supply path and an oil return path, the oil supply path and the oil return path are connected with a transfer oil cylinder through a branch pipe one, and a three-position four-way electromagnetic reversing valve one is connected on the branch pipe one, the oil supply path and the oil return path are connected with a swing oil cylinder through a branch pipe two, and a three-position four-way electromagnetic reversing valve two is connected on the branch pipe two, the middle position function of the three-position four-way electromagnetic reversing valve one and the three-position four-way electromagnetic reversing valve two is both O-shaped;

[0006] The pneumatic system comprises a gas supply path, the gas supply path is connected with a high-low speed control module through a branch pipe three, the high-low speed control module can be manually controlled and electrically controlled, the gas supply path is connected with a clamping cylinder through a branch pipe four, the branch pipe four is connected with a three-position four-way manual reversing valve one, the gas supply path is connected with the clamping cylinder through a branch pipe five, the branch pipe five is connected with a three-position four-way electromagnetic reversing valve three, the gas supply path is connected with a transfer oil cylinder electromagnetic control through a branch pipe six, the branch pipe six is connected with a three-position four-way manual reversing valve two, and the branch pipe six is connected with a three-position four-way electromagnetic reversing valve one circuit on-off of the mechanical control execution part;

[0007] The electric control module has a PLC integrated control box and a controller for remotely controlling the PLC integrated control box, control ends of the three-position four-way electromagnetic reversing valve one, the three-position four-way electromagnetic reversing valve two, the electric control, and the three-position four-way electromagnetic reversing valve three are arranged in the PLC integrated control box, and valve positions of the three-position four-way electromagnetic reversing valve one, the three-position four-way electromagnetic reversing valve two, the electric control, and the three-position four-way electromagnetic reversing valve three are controlled by the controller.

[0008] The high-low speed control module controls high-low speed operation of the propelling device, and the clamping cylinder controls the make-up and removal of the buckle.

[0009] Optionally, an overflow valve is connected to the oil supply path, and an oil outlet of the overflow valve is connected to the oil return path.

[0010] Optionally, a filter is connected to the oil supply path at the pump port.

[0011] Optionally, the transfer oil cylinder and the swing oil cylinder are both two-side bufferable oil cylinders.

[0012] Optionally, an overflow valve and a pressure detection gauge are connected to the gas supply path.

[0013] As a preferred embodiment, a normally open electromagnetic valve is connected to the branch pipe three, a secondary branch pipe is connected to a gas outlet of the normally open electromagnetic valve, two branch pipes are connected to the secondary branch pipe through an adapter, a three-position four-way manual reversing valve three is connected to a gas outlet of one of the branch pipes, two control ports of the three-position four-way manual reversing valve three are connected to the high gear control and the low gear control through thin pipes, and a three-position four-way electromagnetic reversing valve four is connected to a gas outlet of the other branch pipe, two control ports of the three-position four-way electromagnetic reversing valve four are connected to the high gear control and the low gear control through thin pipes.

[0014] As another preferred embodiment, a pneumatic control valve is connected to the thin pipe of the high gear control, two gas inlet interfaces of the clamping cylinder are connected to control ports of the pneumatic control valve through branch pipes, and shuttle valves are arranged at the connection positions of the branch pipes of the two gas inlet interfaces and the control ports of the pneumatic control valve, and two signal detection points of the shuttle valves are gas path signals of the make-up and removal of the buckle.

[0015] Further preferably, an adjustable pressure switch is connected to each of the two gas inlet pipelines of the clamping cylinder.

[0016] Further preferably, the clamping cylinder is a two-side bufferable cylinder.

[0017] Further preferably, the three-position four-way manual reversing valve one, the three-position four-way manual reversing valve two, the three-position four-way manual reversing valve three, the three-position four-way electromagnetic reversing valve three, and the three-position four-way electromagnetic reversing valve four all have Y-shaped neutral positions.

[0018] Compared with the prior art, the application has the beneficial effects that:

[0019] (1) The application adopts electromagnetic valves and hydraulic tongs manual control valves in parallel, designs an integrated pneumatic control box, achieves the requirement that pneumatic control and electric control can control hydraulic tongs at the same time, and in the actual operation process, one of the two control modes can be selected according to the situation, effectively avoiding the harm to the operator, and improving the safety of the hydraulic tongs in use.

[0020] (2) The application adopts the remote control operation mode, lets the personnel away from the hydraulic tongs for remote control operation, and is more convenient and safe to control. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a circuit control block diagram of the hydraulic tongs safety operation system.

[0022] Fig. 2 It is a hydraulic control principle diagram of the hydraulic tongs safety operation system.

[0023] Fig. 3 It is a pneumatic control principle diagram of the hydraulic tongs safety operation system.

[0024] In the figure: 1, three-position four-way electromagnetic reversing valve one; 2, three-position four-way electromagnetic reversing valve two; 3, transfer oil cylinder; 4, swing oil cylinder; 5, normally open electromagnetic valve; 6, three-position four-way manual reversing valve three; 7, three-position four-way electromagnetic reversing valve four; 8, three-position four-way manual reversing valve one; 9, three-position four-way electromagnetic reversing valve four; 10, three-position four-way manual reversing valve two; 11, clamping cylinder; 12, high gear control; 13, low gear control; 14, adjustable pressure switch; 15, pneumatic control valve; 16, shuttle valve; a, oil supply path; b, oil return path; c, air supply path. DETAILED DESCRIPTION

[0025] In the following, the application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0026] In the description of the application, it should be noted that for orientation words, such as terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] like Figs. 1-3 The hydraulic pliers safety operating system shown includes a hydraulic system and a pneumatic system. Both the hydraulic and pneumatic systems have electric control modules. The electric control modules are integrated control structures for the control terminals of the solenoid valves in the hydraulic and pneumatic systems. The hydraulic system includes a supply line a and a return line b. Supply line a is supplied with oil by a set of pumps. One end of the return line b extends into the oil tank. When the pumps work, they draw oil from the oil tank to deliver high-pressure oil to the supply line pipeline. During operation, the returning oil returns to the oil tank through the return line b. Supply line a and return line b are connected to a transfer cylinder 3 via a branch pipe 1. This branch pipe 1 is connected to a three-position four-way solenoid directional valve 1. The branch pipe 1 has two sets of pipelines, which are respectively connected to supply line a and return line b, and their other ends are respectively connected to the three-position four-way solenoid directional valve 1. The inlet and outlet of the solenoid directional valve 1 are connected. The A and B ports of the three-position four-way solenoid directional valve 1 are connected to two thin tubes respectively. The other end of the thin tubes is connected to the two inlet ports of the transfer cylinder 3. The oil supply line a and the return line b are connected to the swing cylinder 4 through the branch pipe 2. The three-position four-way solenoid directional valve 2 is connected to the branch pipe 2. The connection method of the swing cylinder 4 is the same as that of the transfer cylinder 3, which will not be described in detail here. The neutral position function of the three-position four-way solenoid directional valve 1 and the three-position four-way solenoid directional valve 2 is type O. When the transfer cylinder 3 and the swing cylinder 4 are not working, their pistons can be kept in a fixed position, and the pressure in the oil supply line a can be kept stable, so that the transfer cylinder 3 and the swing cylinder 4 can work independently.

[0030] The air pressure system comprises a gas supply path c, the gas supply path c is connected with a high-low speed control module through a branch pipe three, the high-low speed control module can be manually controlled and electrically controlled, that is, manually switching the high-low speed control, that is, controlling the speed of the hydraulic tongs action, the gas supply path c is connected with the clamping cylinder 11 through a branch pipe four, the branch pipe four is connected with a three-position four-way manual reversing valve one 8, the branch pipe four is an air inlet pipe, the lower end of the air inlet pipe is connected with the air inlet of the three-position four-way manual reversing valve one 8, the two air outlets below the three-position four-way manual reversing valve one 8 are respectively connected with two branch pipes, the other ends of the branch pipes are connected at the two interfaces of the clamping cylinder 11, so as to control the reciprocating movement of the clamping cylinder 11, the gas supply path is connected with the clamping cylinder 11 through a branch pipe five, the branch pipe five is connected with a three-position four-way electromagnetic reversing valve three 9, the connection mode of the branch pipe five is the same as that of the branch pipe four, the difference lies in that the three-position four-way electromagnetic reversing valve three 9 and the three-position four-way manual reversing valve one 8 can control each other when one is in the middle position, so that manual and electric control can be exchanged, and the device can be used in different situations, the gas supply path c is connected with a moving and transferring cylinder electromagnetic control 10 through a branch pipe six, the branch pipe six is connected with a three-position four-way manual reversing valve two 10, the upper part of the branch pipe six is an air pipe, one end of the air pipe is connected into the gas supply path c, and the other end is connected to the three-position four-way manual reversing valve two 10, the A and B air outlets below the three-position four-way manual reversing valve two 10 respectively control the control ends of the two electromagnetic valves of the oil cylinder, and cut off or communicate the electric control module of the three-position four-way electromagnetic reversing valve one 1, when the three-position four-way manual reversing valve two 10 is manually pushed to one end, the circuit control of the three-position four-way electromagnetic reversing valve one 1 can be completely cut off, so that the control is invalid, and when the three-position four-way manual reversing valve two 10 is pushed to the other end, the normal control is restored.

[0031] The electric control module has a PLC integrated control box and a controller for remotely controlling the PLC integrated control box, the control ends of the three-position four-way electromagnetic reversing valve one, the three-position four-way electromagnetic reversing valve two, the electric control, and the three-position four-way electromagnetic reversing valve three are arranged in the PLC integrated control box, the valve positions of the three-position four-way electromagnetic reversing valve one, the three-position four-way electromagnetic reversing valve two, the electric control, and the three-position four-way electromagnetic reversing valve three are controlled through the controller, an integrated circuit control is formed, centralized control can be facilitated, and the PLC integrated control box is remotely controlled through the controller, so that a user can control the hydraulic tongs work in a relatively far place, and the safety of the device in use can be greatly improved.

[0032] The high-low speed control module controls the high-low speed operation of the pushing device, and the clamping cylinder controls the buckling and unbuckling.

[0033] The oil supply path a is connected with an overflow valve, and the oil outlet of the overflow valve is connected with the oil return path b, so that the overflow valve can protect the oil supply path a when the oil pressure of the oil supply path a is too large or the oil pressure changes rapidly due to impact.

[0034] A filter is connected to the oil supply line and located at the pump port to filter solid residues in the oil supply line, ensuring the cleanliness of the oil and thus protecting the hydraulic cylinder and other actuators.

[0035] Both the transfer cylinder and the swing cylinder are equipped with two-sided buffer cylinders, which can improve the performance of the device. The buffer structure can avoid the generation of impact.

[0036] An overflow valve and a pressure gauge are connected to the gas supply line c, which can detect the gas pressure in the gas supply line c. The overflow valve can ensure the stability of the gas pressure.

[0037] A normally open solenoid valve 5 is connected to branch pipe 3. The normally open solenoid valve 5 controls the on / off state of the entire air circuit of branch pipe 3. The outlet of the normally open solenoid valve is connected to a secondary branch pipe. The secondary branch pipe is connected to two branch pipes through an adapter. The outlet of one branch pipe is connected to a three-position four-way manual directional valve 3 6. The two control ports of the three-position four-way manual directional valve 3 6 are connected to high-range control 12 and low-range control 13 through thin tubes, respectively. This allows manual control of the three-position four-way manual directional valve 3 6 to switch between high-range control 12 and low-range control 13. The outlet of the other branch pipe is connected to a three-position four-way solenoid directional valve 4 7. The two control ports of the three-position four-way solenoid directional valve 4 7 are connected to high-range control 12 and low-range control 13 through thin tubes, respectively. This allows electric control of the three-position four-way solenoid directional valve 4 7 to switch between high-range control 12 and low-range control 13. This enables both manual and electric control, adapting to control operations under different conditions and avoiding safety accidents.

[0038] A pneumatic control valve 15 is connected to the thin tube where the high-end control is located. The two air inlets of the clamping cylinder 11 are connected to the control port of the pneumatic control valve 15 through branch pipes. A shuttle valve is installed at the connection point between the branch pipes of the two air inlets and the control port of the pneumatic control valve 15. The two signal detection points of the shuttle valve are the air circuit signals for the upper and lower engagement. When air enters the upper engagement air circuit, the shuttle valve cuts off the lower engagement air circuit and opens the pneumatic control valve 15 (using a two-position three-way valve). At this time, the high-end can work normally. Similarly, when air enters the lower engagement air circuit, the shuttle valve 16 cuts off the upper engagement air circuit and opens the pneumatic control valve 15. At this time, the high-end can work normally. The use of the shuttle valve M can ensure that the upper engagement and lower engagement air circuits work normally without interfering with each other. At the same time, it can also meet the requirement of controlling the rotation of the high-end hydraulic tongs when there is no drill bit, so as to achieve the purpose of safety protection.

[0039] An adjustable pressure switch 14 is connected to each of the two air inlet pipes of the clamping cylinder 11, which can adjust the air pressure in the two air inlet pipes of the clamping cylinder to achieve stable control of the operation of the clamping cylinder 11 and avoid the impact caused by unstable air pressure.

[0040] The clamping cylinder 11 is a two-side bufferable cylinder, further improving the stability of the operation of the clamping cylinder 11; the middle positions of the three-position four-way manual reversing valve 8, the three-position four-way manual reversing valve 10, the three-position four-way manual reversing valve 6, the three-position four-way electromagnetic reversing valve 7 and the three-position four-way electromagnetic reversing valve 9 are all K-type, so that when they are in the middle position, the clamping cylinder 11 can be moved under the action of external force, and other execution elements are all in the non-working state, and the air pressure in the gas circuit c can be stabilized.

[0041] The PLC integrated control box realizes the control of all hydraulic clamp operations, the controller remotely applies a control command to the PLC integrated control box, the PLC integrated control box controls the valve position of the electromagnetic valve to realize the connection or disconnection of the oil circuit or the gas circuit, and all functions such as the starting of the hydraulic station, the moving of the hydraulic clamp, the left-right alignment, the clamping cylinder buckling and unbuckling, the high-low speed air tire clutch gas inlet and exhaust, the up-down adjustment of the hydraulic clamp, the clockwise and counterclockwise rotation of the hydraulic clamp, and the like can be realized.

[0042] Hydraulic station starting: the construction personnel uses the controller to issue a first instruction, and after the PLC integrated control box receives the first instruction, the PLC integrated control box controls the starting or stopping of the 380V motor through the alternating current contactor.

[0043] Hydraulic clamp moving: the construction personnel uses the controller to issue a second instruction, and after the PLC integrated control box receives the second instruction, the PLC integrated control box controls the moving oil cylinder 3 through the three-position four-way electromagnetic reversing valve one 1 in the oil circuit of the moving oil cylinder 3, the oil cylinder extends the truss to connect the hydraulic clamp to move forward, the oil cylinder retracts the truss to connect the hydraulic clamp to move backward, and the oil cylinder oil circuit is self-locked and pressure-bearing to stop the hydraulic clamp at the working position.

[0044] Hydraulic clamp rotation automatic alignment control: the construction personnel uses the controller to issue a third instruction, and after the PLC integrated control box receives the third instruction, the PLC integrated control box controls the swing oil cylinder 4 through the three-position four-way electromagnetic reversing valve two 2 in the oil circuit of the swing oil cylinder 4, the truss support is connected to the tail pile through the pipe clamp, and the left-right swing of the hydraulic clamp is realized by controlling the extension and retraction of the oil cylinder.

[0045] Clamping cylinder buckling and unbuckling:

[0046] The construction personnel uses the controller to issue a fourth instruction, and after the PLC integrated control box receives the fourth instruction, the PLC integrated control box controls the clamping cylinder 11 through the three-position four-way electromagnetic reversing valve four 9 in the gas circuit of the clamping cylinder 11, or manually controls the clamping cylinder 11 through the three-position four-way manual reversing valve one 8 to realize the purpose of buckling and unbuckling.

[0047] High-low speed air tire clutch gas inlet and exhaust:

[0048] The construction personnel use the controller to send a fifth instruction, and the PLC integrated control box receives the fifth instruction and controls the three-position four-way electromagnetic reversing valve four 7, or the construction personnel manually operate the three-position four-way manual reversing valve three 6, to achieve the purpose of inflating the high-speed air tire clutch or the low-speed air tire clutch, and to achieve the purpose of controlling the high-speed or low-speed operation of the propelling device.

[0049] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A safety operating system for hydraulic pliers, comprising a hydraulic system and a pneumatic system, wherein both the hydraulic system and the pneumatic system have an electric control module, characterized in that: The hydraulic system includes a supply line and a return line. The supply line and the return line are connected to a transfer cylinder via a branch pipe 1, and a three-position four-way solenoid directional valve 1 is connected to the branch pipe 1. The supply line and the return line are connected to a swing cylinder via a branch pipe 2, and a three-position four-way solenoid directional valve 2 is connected to the branch pipe 2. The neutral position function of both the three-position four-way solenoid directional valve 1 and the three-position four-way solenoid directional valve 2 is type O. The pneumatic system includes an air supply line, which is connected to a high / low speed control module via branch pipe three. The high / low speed control module can be manually or electrically controlled and is connected to high-speed control and low-speed control. The air supply line is connected to a clamping cylinder via branch pipe four, and a three-position four-way manual directional valve one is connected to branch pipe four. The air supply line is connected to the clamping cylinder via branch pipe five, and a three-position four-way solenoid directional valve three is connected to branch pipe five. The air supply line is connected to a transfer cylinder with electromagnetic control via branch pipe six, and a three-position four-way manual directional valve two is connected to branch pipe six. The actuator connected to branch pipe six mechanically controls the circuit opening and closing of the three-position four-way solenoid directional valve one. The electric control module has a PLC integrated control box and a controller for remotely controlling the PLC integrated control box. The control terminals of the three-position four-way solenoid valve one, three-position four-way solenoid valve two, electric control, and three-position four-way solenoid valve three are all set in the PLC integrated control box. The controller controls the valve positions of the three-position four-way solenoid valve one, three-position four-way solenoid valve two, electric control, and three-position four-way solenoid valve three. The high and low speed control module controls the high and low speed operation of the propulsion device, the clamping cylinder controls the fastening and unfastening, the swing cylinder controls the automatic alignment of the rotary joint, and the transfer cylinder controls the up and down adjustment cylinder. A pneumatic control valve is connected to the thin tube where the high-end control is located. The two air inlets of the clamping cylinder are connected to the control port of the pneumatic control valve through branch pipes. A shuttle valve is installed at the connection between the branch pipes of the two air inlets and the control port of the pneumatic control valve. The two signal detection points of the shuttle valve are the air circuit signals for fastening and unfastening.

2. The hydraulic pliers safety operating system as described in claim 1, characterized in that: An overflow valve is connected to the oil supply line, and the oil outlet of the overflow valve is connected to the return oil line.

3. The hydraulic pliers safety operating system as described in claim 1, characterized in that: A filter is connected to the oil supply line at the pump inlet.

4. The hydraulic pliers safety operating system as described in claim 1, characterized in that: Both the transfer cylinder and the swing cylinder are equipped with cylinders that can be buffered on both sides.

5. The hydraulic pliers safety operating system as described in claim 1, characterized in that: An overflow valve and a pressure gauge are connected to the gas supply line.

6. The hydraulic pliers safety operating system as described in claim 1, characterized in that: A normally open solenoid valve is connected to the third branch pipe. The outlet of the normally open solenoid valve is connected to a secondary branch pipe. The secondary branch pipe is connected to two branch pipes via an adapter. The outlet of one branch pipe is connected to a three-position four-way manual directional valve three. The two outlets of the three-position four-way manual directional valve three are connected to high-gear control and low-gear control respectively via thin tubes. The outlet of the other branch pipe is connected to a three-position four-way solenoid directional valve four. The two outlets of the three-position four-way solenoid directional valve four are connected to high-gear control and low-gear control respectively via thin tubes.

7. The hydraulic pliers safety operating system as described in claim 1, characterized in that: The clamping cylinder has two air inlet pipes connected to adjustable pressure switches.

8. The hydraulic pliers safety operating system as described in claim 1, characterized in that: The clamping cylinder is a double-sided buffer cylinder.

9. The hydraulic pliers safety operating system as described in claim 6, characterized in that: The neutral position function of the three-position four-way manual directional valve 1, three-position four-way manual directional valve 2, three-position four-way manual directional valve 3, three-position four-way solenoid directional valve 3, and three-position four-way solenoid directional valve 4 is all Y-type.

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