Novel pneumatic machinery remote control safety protection gas circuit

Abstract

The utility model discloses a novel pneumatic machinery remote control safety protection gas circuit, which relates to the technical field of pneumatic machinery control and mainly comprises a control gas circuit and a protection gas circuit. On the basis of a novel pneumatic machine remote control gas circuit, the safety protection gas circuit is designed, so that remote control of a high-power pneumatic machine has the safety protection functions of gas-cut braking, fiber protection, overload protection, rope loosening protection, sudden stop protection, emergency release and the like, meanwhile, the function switching of whether the load is limited or not is realized, the structure is simple, and the operation is convenient. The device is simple in structure and convenient to operate, realizes remote control of the large-tonnage pneumatic equipment and increases a safety protection function, greatly improves the safety of remote control of the large-tonnage pneumatic equipment, provides a great guarantee for safety production, and is suitable for large-scale popularization and application in the industry.

Description

TECHNICAL FIELD

[0001] The utility model relates to the control technical field of pneumatic machinery, specifically a novel pneumatic machinery remote control safety protection control gas circuit. BACKGROUND

[0002] Pneumatic machinery technology is a technology that uses compressed air as a power source to complete various works, has the advantages of fast speed, high efficiency, low cost, environmental protection and energy saving, is widely used in various industrial fields and plays an increasingly important role. Pneumatic machinery is divided into high-power pneumatic machinery and low-power pneumatic machinery. For high-power pneumatic machinery, the main gas path diameter must meet the requirement of large gas consumption, and the control mode of large-diameter functional valve is different from that of small-diameter functional valve. For example, the small-diameter pneumatic control valve is a two-pneumatic control port double-leakage return center, while the large-diameter double-pneumatic control valve is a two-pneumatic control port double-pressure return center, and the control pressure of the large-diameter pneumatic control valve is often large, and the gas pressure fluctuation of compressed air has a great influence on the accuracy of operation. Through the improvement design of the operation gas circuit control mode and principle, the requirement of remote operation of high-power pneumatic machinery can be realized, for example, the Chinese patent (ZL 202321434403.8) CN220081824U obtained by our company discloses a novel pneumatic machinery remote pneumatic control gas circuit, but the control gas circuit does not design a safety protection control gas circuit.

[0003] With the high attention of the state to production safety and the further improvement of safety awareness in various industries, the safety protection function requirement of various products has become an inevitable option. Production equipment, regardless of size and purpose, must have necessary safety protection function as much as possible, therefore, the safety protection gas circuit of the remote control gas circuit of high-power pneumatic machinery is a technical problem to be solved. SUMMARY

[0004] To solve the above technical problems, the utility model provides a novel pneumatic machinery remote control safety protection control gas circuit, which greatly improves the safety of remote operation of high-power pneumatic machinery and provides further protection for safe production.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of:

[0006] The application discloses a novel pneumatic mechanical remote control safety protection gas circuit which is mainly composed of a control gas circuit and a protection gas circuit. The control gas circuit comprises a gas supply circuit, a remote control handle, a master control box and a power device. One of the gas supply circuit is connected to a P1 interface of the master control box through a control gas source P1, and the other is connected to a main gas supply port P of the power device through a main gas source P. Each interface of the master control box is connected to the corresponding interface of the power device and the remote control handle. The power device provides power output and is provided with a gas cut-off brake part. The master control box is set as a centralized control unit, responds to the pneumatic signals sent by the external operation and safety protection control device and sends interlocked control pneumatic signals, so as to realize the safety control and safety protection of the pneumatic mechanical device. The remote control handle is used to realize the power output of the power device in different directions and the instantaneous gas cut-off brake in an emergency through the operation of a button valve. The protection gas circuit comprises a limit protection gas circuit and an emergency release gas circuit which are connected to the corresponding interfaces of the master control box. The limit protection gas circuit comprises an upper limit mechanical valve one, a lower limit mechanical valve two and a rope release mechanical valve three. The gas outlet of the upper limit mechanical valve one is connected to a lifting operation control gas circuit. The gas outlets of the lower limit mechanical valve two and the rope release mechanical valve three are respectively connected to a lowering operation control gas circuit. When any one of the three valves is triggered, the master control box sends a signal to control the power device to stop running and cut off the brake. The emergency release gas circuit comprises a gas storage tank, a water release valve and a safety valve. The gas storage tank is connected to the gas cut-off brake device of the power device through the master control box. When the main gas source is unexpectedly interrupted and there is no auxiliary gas source, the gas cut-off brake device of the power device is released, and the load is placed in a safe position.

[0007] The master control box comprises a gas control valve two, a gas control valve three, a shuttle valve two, a shuttle valve three, a shuttle valve four, a gas control valve four, a pressure regulating valve two, a gas supplement nozzle, a manual valve one, a one-way valve one, a manual valve, a shuttle valve five, a throttle valve, a shuttle valve six, a gas control valve five, a one-way valve two, a shuttle valve seven, a gas control valve six, a gas control valve seven and a gas control valve eight. The control gas source of the gas supply circuit enters the master control box through a P1 interface, is connected to the gas supply ports of the gas control valve three, the gas control valve six, the gas control valve seven and the gas control valve eight and is connected to the gas supply B interface of the remote control handle through the B interface of the master control box. The gas control valve three, the gas control valve four and the gas control valve eight are set as normally closed, the gas control valve six and the gas control valve seven are set as normally open, the control gas source is discharged from the gas control valve six and the gas control valve seven to the two gas control ports of the gas control reversing valve, the load gas circuit of the power device is connected to the gas control port of the gas control valve five through the manual valve one, is connected to the gas taking port of the gas control valve five through the throttle valve and the one-way valve two, the gas taking port of the gas control valve five is additionally connected to the gas control port of the gas control valve four, the other gas control port of the gas control valve four is connected to the outlet of the pressure regulating valve two, the gas supply ports of the limit protection gas circuit are connected to the shuttle valve four, the shuttle valve three, the shuttle valve two and the gas control valve two, and the gas storage tank of the emergency release gas circuit is connected to the gas control interface of the gas cut-off brake device of the power device through the manual valve one, the shuttle valve five and the quick discharge valve of the power device.

[0008] The shuttle valve five is connected with the working port of the shuttle valve six, and the two air inlets of the shuttle valve six are respectively connected with the upper limit mechanical valve one and the lower limit mechanical valve two of the limit protection air path, the rope loosening protection mechanical valve three, and the button valve one and the button valve two of the remote handle.

[0009] The power device comprises an air control reversing valve, a motor, a power output component, a manual auxiliary brake, a gas cut-off brake device and a quick exhaust valve.

[0010] The remote handle comprises a starting valve, a shuttle valve one, an emergency stop valve, a button valve one and a button valve two.

[0011] The utility model discloses on the basis of novel pneumatic machinery remote control control gas path, and designs the safety protection gas path, and the remote control of high -power pneumatic machinery has the safety protection function such as gas cut-off brake, limit protection, overload protection, rope loosening protection, emergency stop protection and emergency release, and simultaneously realizes the function switching of whether the load is limited, the setting of gas control valve five guarantees that the overload air control port of gas control valve four is completely depressurized under the non -lifting operation state, and the reliability, accuracy of guaranteeing overload protection, the setting of throttle valve, one -way valve two guarantees that the overload air control port of gas control valve four is stable decompression and air pressure is relatively stable under the lifting operation state, is not influenced by the instantaneous change of lifting gas path pressure, and more accurately guarantees the work safety, the setting of shuttle valve two, shuttle valve three, shuttle valve four guarantees that limit protection gas path and overload protection gas path independently play the protection function and do not interfere with each other, under the condition that the main gas supply supply appears accidental stop, the load is not in the safe position, has no auxiliary gas source, emergency release gas path realizes the load in the safe position, and shuttle valve five links emergency release gas path and gas cut-off brake device, and the setting of shuttle valve six makes remote handle operation gas control gas source, limit protection gas path gas source not to interfere with each other, and independently realizes its protection function, the setting of manual valve can switch controllable load work state and non -controllable load work state according to the safety requirement of different work nature and environment, the utility model discloses simple structure, convenient operation make the remote control of large -tonnage pneumatic equipment and increase safety protection function become possible, and the safety of remote control of large -tonnage pneumatic equipment is greatly improved, provides great guarantee for safety production, is suitable for large -scale popularization and application in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure principle schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The utility model will be described in detail in combination with the drawings and specific embodiment:

[0014] As Figure 1The new type of pneumatic machinery remote control safety protection gas path, as shown, is mainly composed of a control gas path and a protection gas path. The control gas path includes a gas supply path 100, a remote control handle 200, a master control box 300 and a power device 600. One control gas source P1 of the gas supply path 100 is connected to a P1 interface of the master control box 300, and the other main gas source P is connected to a main gas inlet P of the power device 600. Each interface of the master control box 300 is connected to the corresponding interface of the power device 600 and the remote control handle 200. The power device 600 provides power output and sets a gas cut-off braking part. The master control box 300 is set as a centralized control unit, responds to the pneumatic signals sent by the external operation and safety protection control device, and sends interlocking control pneumatic signals to realize the safety control and safety protection of the pneumatic machinery. The remote control handle 200 realizes the power output of the power device 600 in different directions and the instantaneous gas cut-off braking in emergency through the operation of the button valve. The protection gas path includes a limit protection gas path 400 and an emergency release gas path 500 connected to the corresponding interfaces of the master control box 300. The limit protection gas path 400 includes an upper limit mechanical valve one 401, a lower limit mechanical valve two 402 and a rope protection mechanical valve three 403. The gas inlet of the upper limit mechanical valve one 401 is connected to the lifting operation control gas path. The gas inlets of the lower limit mechanical valve two 402 and the rope protection mechanical valve three 403 are connected to the lowering operation control gas path. When any of the above three valves is triggered, the master control box 300 sends a signal to control the power device 600 to stop running and cut off the gas brake. The emergency release gas path 500 includes a gas storage tank 501, a water release valve 502 and a safety valve 503. The gas storage tank 501 is connected to the gas cut-off braking device of the power device 600 through the master control box 300. When the main gas source is accidentally interrupted and there is no auxiliary gas source, the gas cut-off braking device of the power device 600 is released, and the load is placed in a safe position.

[0015] As a preferred mode, in the embodiment, the main control box 300 contains the air control valve two 301, the air control valve three 302, the shuttle valve two 303, the shuttle valve three 304, the shuttle valve four 305, the air control valve four 306, the pressure regulating valve two 307, the air supplement nozzle 308, the manual valve one 309, the one-way valve one 310, the manual valve 311, the shuttle valve five 312, the throttle valve 313, the shuttle valve six 314, the air control valve five 315, the one-way valve two 316, the shuttle valve seven 317, the air control valve six 318, the air control valve seven 319, and the air control valve eight 320. The control gas source of the gas supply gas circuit 100 enters the main control box 300 through the P1 interface, is connected to the gas supply ports of the air control valve three 302, the air control valve six 318, the air control valve seven 319, and the air control valve eight 320, and is connected to the gas supply B interface of the remote control handle 200 through the B interface of the main control box 300. The air control valve three 302, the air control valve four 306, and the air control valve eight 320 are all set to be normally closed, and the air control valve six 318 and the air control valve seven 319 are set to be normally open. The control gas source passes through the air control valve six 318 and the air control valve seven 319 to the two air control ports of the air control reversing valve 601. The load gas circuit of the power device 600 is connected to the air control port of the air control valve five 315 through the manual valve 311 and is connected to the gas taking port of the air control valve five 315 through the throttle valve 313 and the one-way valve two 316. The gas taking port of the air control valve five 315 is additionally connected to the air control port of the air control valve four 306 through the corresponding gas outlet, and the other air control port of the air control valve four 306 is connected to the outlet of the pressure regulating valve two 307. The hydrogen port of the limit protection gas circuit 400 is connected to the shuttle valve four 305, the shuttle valve three 304, the shuttle valve two 303, and the air control valve two 301 from the gas outlet. The gas tank 501 of the emergency release gas circuit 500 is connected to the air control interface of the quick exhaust valve 606 of the power device 600 through the manual valve one 309, the shuttle valve five 312, and the break brake 605.

[0016] As a preferred mode, in the embodiment, one of the gas inlets of the shuttle valve five 312 is connected to the working port of the shuttle valve six 314, and the other two gas inlets of the shuttle valve six 314 are respectively connected to the upper limit mechanical valve one 401 and the lower limit mechanical valve two 402 of the limit protection gas circuit 400, the loose rope protection mechanical valve three 403, and the button valve one 204 and the button valve two 205 of the remote control handle 200. The upper and lower limit functions are independently taken gas. The shuttle valve five 312 and the shuttle valve six 314 are arranged to connect the emergency release gas circuit 500 and the break brake 605, and do not interfere with the operation of the air control gas source of the remote control handle 200 and the gas taking source of the limit protection gas circuit 400.

[0017] As a preferred mode, in the embodiment, the power device 600 contains the air control reversing valve 601, the motor 602, the power output component 603, the manual auxiliary brake 604, the break brake 605, and the quick exhaust valve 606.

[0018] As a preferred mode, in the embodiment, the remote control handle 200 comprises a starting valve 201, a shuttle valve 202, an emergency stop valve 203, a button valve 204 and a button valve 205.

[0019] As shown in the embodiment, the specific implementation process of the utility model is as follows: Figure 1

[0020] The three-way valve 101 is the inlet of the main gas source and the emergency gas source in the gas supply gas circuit 100, and the main gas source is always connected with the water distributor 102 in the normal state, and after the main gas source is accidentally interrupted, the three-way valve 101 is switched to the emergency gas source to communicate with the water distributor 102 to handle emergency events, and the water distributor 102, the pressure regulating valve 103 and the oil atomizer 104 constitute a gas treatment triple unit to further filter, regulate pressure and form oil mist for lubricating the execution element for the compressed air of the main gas source.

[0021] The compressed air treated by the gas treatment triple unit is connected to the P1 interface of the main control box 300 through the control gas source P1, and the other way is connected to the main gas supply port P of the gas control reversing valve 601 through the main gas source P of the gas control valve 105.

[0022] The main control box 300 is a centralized control unit of the gas circuit, and responds to the pneumatic signals sent by the external operation and safety protection control devices and sends interlocking control pneumatic signals to realize the safe operation and safety protection function of the pneumatic machinery. The gas control interface K of the main control box 300 is connected with the gas control port K of the gas control valve 105; the A, B, C, D and E interfaces of the main control box 300 are connected with the A, B, C, D and E interfaces of the remote control handle 200 respectively, the F, G, H, I and J interfaces are connected with the F, G, H, I and J interfaces of the limit protection gas circuit 400 respectively, the L interface is connected with the L interface of the emergency release gas circuit 500, and the M, N, Q and R interfaces are connected with the M, N, Q and R interfaces of the power device 600.

[0023] ​In the normal gas supply state of the gas supply path 100, the P1 interface is in the normal gas state, and the gas control valve one 105 is set to be normally closed (the inlet and outlet are not connected), so that the main gas source cannot reach the main gas supply port of the gas control reversing valve 601 of the power device 600 through the gas control valve one 105; the control gas source of the gas supply path 100 enters the main control box 300 through the P1 interface, is connected to the gas supply ports of the gas control valve three 302, the gas control valve four 306, the gas control valve six 318, the gas control valve seven 319 and the gas control valve eight 320 respectively, and is connected to the gas supply B interface of the remote handle 200 through the main control box 300B interface; the gas control valve three 302, the gas control valve four 306 and the gas control valve eight 320 are all set to be normally closed, the gas control valve six 318 and the gas control valve seven 319 are set to be normally open (the inlet and outlet are always connected), the control gas source passes through the outlets of the gas control valve six 318 and the gas control valve seven 319 to the two gas control ports of the gas control reversing valve 601, and because the gas control reversing valve 601 is in a double-pressure middle position control mode, the gas control reversing valve 601 is in a middle position leakage state in a non-control state, the motor 602 cannot operate, and the gas brake device 605 is in a gas brake state.

[0024] In operation, first, the start valve 201 of the remote handle 200 is pressed, the inlet and outlet of the start valve 201 are connected, the control gas source pushes the shuttle valve one 202 to reverse, and enters the main control box 300 through the emergency stop valve 203 and the E interface, one way to the gas source inlet of the pressure regulating valve two 307, and the other way to the gas control port of the gas control valve two 301 to make the gas control valve two 301 reverse, the inlet and outlet of the gas control valve three 302 are connected, the inlet control gas source is divided into three ways after passing through the outlet, one way is connected to the gas inlet of the gas control valve four 306, one way is connected to the gas tank 501 gas inlet of the emergency release gas path 500 through the one-way valve one 310, the manual valve one 309 and the interface L, and the other way is connected to the gas inlet end of the button valve one 204 and the button valve two 205 of the remote handle 200 through the C interface, and then to the other inlet end of the shuttle valve one 202 to push it to reverse, and then the gas source enters the main control box 300 through the emergency stop valve 203 and the E interface, and keeps the existing gas path connected and controllable state.

[0025] When the button valve one 204 or the button valve two 205 of the remote control handle 200 is pressed, the control gas source of the remote control handle 200 will reach the gas control port of the gas control valve seven 319 or the gas control valve six 318 through the A interface or the D interface to make it reverse, causing the gas control port of one end of the gas control reversing valve 601 to be depressurized and reversed, at the same time, the control gas source of the gas control port of the gas control valve seven 319 or the gas control valve six 318 passes through the shuttle valve six 314, the shuttle valve five 312, the R interface, the quick exhaust valve 606 to the gas control port of the gas cut-off brake 605 to open the brake, and the control gas source of the gas control port of the gas control valve seven 319 or the gas control valve six 318 passes through the shuttle valve seven 317 to the gas control port of the gas control valve eight 320 to make it reverse, the gas source of the P1 interface passes through the gas control valve eight 320, the K interface to the gas control port of the gas control valve one 105 to make it reverse to connect the inlet and outlet gas ports, the main gas source passes through the P interface to the main gas supply port of the gas control reversing valve 601, and the motor 602 operates.

[0026] When the button valve one 204 and the button valve two 205 of the remote control handle 200 are automatically reset, the control gas source of the gas control port of the gas control valve six 318, the gas control valve seven 319 and the gas control valve eight 320 is cut off by the button valve one 204 and the button valve two 205 and is depressurized, the gas control valve six 318, the gas control valve seven 319 and the gas control valve eight 320 are reset, the two gas control ports of the gas control reversing valve 601 are pressurized and reset, the gas control port of the gas control valve one 105 is depressurized and reversed, the main gas source is interrupted, and the motor 602 stops operating, at the same time, the R interface gas path is depressurized due to pressure drop, the gas control port of the gas cut-off brake 605 is quickly exhausted and depressurized through the quick exhaust valve 606 to implement instantaneous braking.

[0027] When an emergency situation occurs during the operation process, the emergency stop valve 203 of the remote control handle 200 can be quickly pressed, the E interface exhausts and depressurizes the gas control valve three 302 to reverse, the C port cuts off the control gas source supply and exhausts and depressurizes, even if the button valve one 204 and the button valve two 205 cannot be automatically reset, the A and D interfaces lose the control gas source supply and exhaust and depressurize through the C port, the gas control valve six 318, the gas control valve seven 319 and the gas control valve eight 320 are automatically reset because the control gas source of the gas control port is in a zero pressure state, the two gas control ports of the gas control reversing valve 601 are pressurized and reset, the motor 602 stops operating, the gas control port of the gas control valve one 105 is depressurized and reversed, the main gas source is interrupted, at the same time, the R interface gas path is depressurized due to pressure drop, the gas control port of the gas cut-off brake 605 is quickly exhausted and depressurized through the quick exhaust valve 606 to implement instantaneous braking, at this time, the C interface gas path has no control gas source supply and cannot implement effective control, after the emergency situation is resolved, the start valve 201 of the remote control handle 200 must be pressed again to restore the normal standby control state, so as to better ensure the safety of the operation.

[0028] The load gas circuit of the power device 600 is connected to the gas control port of the gas control valve five 315 through the Q interface, one way through the manual valve 311, and the other way through the throttle valve 313 and the one-way valve two 316 to the gas taking port of the gas control valve five 315. The gas taking port of the gas control valve five 315 is connected to the gas control port of the gas control valve four 306 through the corresponding gas outlet. The other gas control port of the gas control valve four 306 is connected to the outlet of the pressure regulating valve two 307. When the power device 600 is running under load, if the actual load exceeds the safe load control range, the lifting air duct pressure of the Q interface of the motor 602 will change with the load, and the heavier the load, the higher the air duct pressure. When the lifting air duct pressure exceeds a certain value of the set pressure of the pressure regulating valve two 307 (the gas control valve reversing pressure), the gas control valve four 306 will be reversed. The gas source from the outlet of the gas control valve four 306 through the shuttle valve three 304 to the gas control port of the gas control valve two 301 makes it reverse, and the gas control valve three 302 reverses due to the exhaust pressure relief of the gas control port. The C port gas circuit gas source supply is cut off and the exhaust pressure relief, and the subsequent protection function response is basically the same as the emergency stop valve 203 of the push remote control handle 200. The gas control valve five 315 is set to ensure that the overload gas control port of the gas control valve four 306 is completely depressurized in the non-lifting operation state, and to ensure the reliability and accuracy of the overload protection. The throttle valve 313 and the one-way valve two 316 are set to ensure the smooth pressure reduction and relatively stable pressure of the overload gas control port of the gas control valve four 306 in the lifting operation state, and are not affected by the instantaneous changes of the lifting gas circuit pressure, such as rapid operation, load inertia and other factors causing temporary and short-term pressure increase, so as to more accurately ensure the safety of operation.

[0029] The upper limit mechanical valve one 401 of the limit protection gas circuit 400 is connected to the lifting operation control gas circuit through the gas taking port. The lower limit mechanical valve two 402 and the rope slack protection mechanical valve three 403 are connected to the lowering operation control gas circuit through the gas taking port. When the winch runs to the limit position, such as the upper limit, and triggers the upper limit mechanical valve one 401, the gas source from the outlet through the shuttle valve four 305, the shuttle valve three 304 and the shuttle valve two 303 to the gas control port of the gas control valve two 301 makes it reverse. The gas control valve three 302 reverses due to the exhaust pressure relief of the gas control port. The C port gas circuit gas source supply is cut off and the exhaust pressure relief, and the subsequent protection function response is basically the same as the emergency stop valve 203 of the push remote control handle 200. Re-pressing the start valve 201 of the remote control handle 200, after the normal standby control state is restored, if the winch is operated again, the limit protection will respond again because the upper limit mechanical valve one 401 is still in the triggered position, and only the reverse operation can be implemented. When the reverse operation triggers the lower limit mechanical valve two 402 and the rope slack protection mechanical valve three 403, the protection function response is the same as triggering the upper limit mechanical valve one 401. The settings of the shuttle valves two 303, three 304 and four 305 ensure that the limit protection gas circuit and the overload protection gas circuit independently play a protection role without interfering with each other.

[0030] The corresponding functions and control relationship settings of shuttle valve seven 317 and air control valve six 318, air control valve seven 319, air control valve eight 320 and air control valve one 105 ensure the double-pressure mid-position control function of the air control reversing valve 601, and coordinate the operation, stop and braking of the power device 600 with the on and off of the main air source. Even in the case that the air control reversing valve 601 cannot accurately return to the mid-position, the power device 600 is completely stopped and braked in the non-operation operating state, thereby maximizing the safety of the operating personnel and equipment.

[0031] When the main air source supply stops unexpectedly and the load is not in a safe position, if there is an auxiliary air source, it can be connected to another interface of the three-way valve 101 and switched to a state in which the auxiliary air source is in communication with the air treatment three-way valve, so that the auxiliary air source is used to operate the winch to place the load in a safe position.

[0032] If there is no auxiliary air source, the manual valve one 309 can be switched to make the compressed air in the gas tank 501 pass through the manual valve one 309, the shuttle valve five 312 and the quick exhaust valve 606 to the air control interface of the air brake device 605, open the air brake device 605, and cooperate with the manual auxiliary brake 604 to place the load in a safe position. The shuttle valve five 312 and the shuttle valve six 314 are arranged to connect the emergency release air path 500 and the air brake device 605, and do not interfere with the remote control handle 200 operating air control air source and the limit protection air path 400 air source. When the compressed air in the gas tank 501 is insufficient due to overlong pressure maintaining time, etc., an air pump or other auxiliary inflation tool can be used to supplement the air pressure of the system from the air supplementing nozzle 308 to normally complete the safe release operation and ensure the safety of the operation. The volume of the gas tank 501 is set according to the volume of the air chamber of the air brake device 605 and the brake opening pressure thereof. The safety valve 503 is arranged to ensure the normal safe release air pressure and safe use air pressure of the gas tank 501, and the drain valve 502 is arranged to release the moisture accumulated in the gas tank 501 to ensure sufficient gas storage capacity.

[0033] In view of the different safety requirements of the nature and environment of the operation, the function switching manual valve 311 is arranged. When the low load control has a higher safety requirement, the manual valve 311 should be in a normally open state, and by adjusting the safety working pressure and pressure difference of the main air source pressure regulating valve one 103 and the overload pressure regulating valve two 307, more accurate safety control of the load is realized. When the non-controlled load operation is within the load capacity range of the equipment, the manual valve 311 can be in a normally closed state, the low load overload setting is closed, and the highest pressure of the main air source is limited to realize reasonable load limiting operation.

[0034] Of course, the above description is not a limitation of the utility model, the utility model is also not limited to the above examples, the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A novel pneumatic mechanical remote control safety protection gas circuit, mainly composed of a control gas circuit and a protection gas circuit, the control gas circuit comprising a gas supply circuit (100), a remote control handle (200), a master control box (300) and a power device (600), one-way control gas source P1 is connected to the P1 interface of the master control box (300), and the other way of the main gas source P is connected to the main gas inlet P of the power device (600), the interfaces of the master control box (300) are respectively connected to the corresponding interfaces of the power device (600) and the remote control handle (200), the power device (600) provides power output and sets a gas cutoff brake part, the master control box (300) is set as a centralized control unit, responds to the pneumatic signals sent by the external operation and safety protection control device and sends interlocking control pneumatic signals, so as to realize the safety control and safety protection of the pneumatic machinery, the remote control handle (200) realizes the power output of the power device (600) in different directions and the instantaneous gas cutoff brake in emergency through the operation of the button valve, characterized in that, The protection gas path comprises a limit protection gas path (400) and an emergency release gas path (500) connected with the corresponding interfaces of the main control box (300) respectively, the limit protection gas path (400) comprises an upper limit mechanical valve one (401), a lower limit mechanical valve two (402) and a rope loosening protection mechanical valve three (403), the gas inlet of the upper limit mechanical valve one (401) is connected to the lifting operation control gas path, the gas inlets of the lower limit mechanical valve two (402) and the rope loosening protection mechanical valve three (403) are connected to the lowering operation control gas path respectively, when any one of the above three valves is triggered, the main control box (300) sends a signal to control the power device (600) to stop running and brake by cutting off the gas, the emergency release gas path (500) comprises a gas storage tank (501), a water release valve (502) and a safety valve (503), the gas storage tank (501) is connected with the gas cutting brake device of the power device (600) through the main control box (300), when the main gas source is accidentally interrupted and there is no auxiliary gas source, the power device (600) is released from the gas cutting brake, and the load is placed in a safe position.

2. The novel pneumatic mechanical remote control safety protection air path according to claim 1, characterized in that, The main control box (300) contains pneumatic valve two (301), pneumatic valve three (302), shuttle valve two (303), shuttle valve three (304), shuttle valve four (305), pneumatic valve four (306), pressure regulating valve two (307), air charging nozzle (308), manual valve one (309), check valve one (310), manual valve (311), shuttle valve five (312), throttle valve (313), shuttle valve six (314), pneumatic valve five (315), check valve two (316), shuttle valve seven (317) and pneumatic valve six (318), pneumatic valve seven (319), pneumatic valve eight (320), the control gas source of the gas supply gas circuit (100) enters the main control box (300) through the P1 interface, is connected to the gas supply port of the pneumatic valve three (302), the pneumatic valve six (318), the pneumatic valve seven (319) and the pneumatic valve eight (320) respectively, and is connected to the gas supply B interface of the remote handle (200) through the B interface of the main control box (300), the pneumatic valve three (302), the pneumatic valve four (306) and the pneumatic valve eight (320) are all set to be closed, the pneumatic valve six (318) and the pneumatic valve seven (319) are set to be opened, the control gas source passes through the two pneumatic ports of the pneumatic control reversing valve (601) to the pneumatic outlet of the pneumatic valve six (318) and the pneumatic valve seven (319); the load gas circuit of the power device (600) is connected to the pneumatic port of the pneumatic valve five (315) through the manual valve (311) in one way, and is connected to the gas taking port of the pneumatic valve five (315) through the throttle valve (313) and the check valve two (316) in another way, the gas taking port of the pneumatic valve five (315) is additionally connected to the pneumatic port of the pneumatic valve four (306) through the corresponding gas outlet, and the other pneumatic port of the pneumatic valve four (306) is connected to the outlet of the pressure regulating valve two (307); the gas source of the position limiting protection gas circuit (400) is connected to the shuttle valve four (305), the shuttle valve three (304), the shuttle valve two (303) and the pneumatic valve two (301) from the gas outlet; the gas tank (501) of the emergency release gas circuit (500) is connected through the manual valve one (309), the shuttle valve five (312), the quick exhaust valve (606) of the power device (600) to the pneumatic control interface of the air cut brake device (605).

3. The novel pneumatic mechanical remote control safety protection air path according to claim 2, characterized in that, One gas inlet of the shuttle valve five (312) is connected to the working port of the shuttle valve six (314), two gas inlets of the shuttle valve six (314) are respectively connected to the upper limit mechanical valve one (401) and the lower limit mechanical valve two (402) of the position limiting protection gas circuit (400), the rope loosening protection mechanical valve three (403) and the button valve one (204) and the button valve two (205) of the remote handle (200), and the upper and lower limit function gas circuits independently take gas.

4. The novel pneumatic mechanical remote control safety protection air path according to claim 1, characterized in that, The power device (600) contains the pneumatic control reversing valve (601), the motor (602), the power output component (603), the manual auxiliary brake (604), the air cut brake device (605) and the quick exhaust valve (606).

5. The novel pneumatic mechanical remote control safety protection air path of claim 1, wherein, The remote control handle (200) comprises a starting valve (201), a shuttle valve I (202), an emergency stop valve (203), a button valve I (204) and a button valve II (205).

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