CN111824993B - Anti-false starting device and operation method for pneumatic winch - Google Patents

Anti-false starting device and operation method for pneumatic winch Download PDF

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Publication number
CN111824993B
CN111824993B CN201910307728.1A CN201910307728A CN111824993B CN 111824993 B CN111824993 B CN 111824993B CN 201910307728 A CN201910307728 A CN 201910307728A CN 111824993 B CN111824993 B CN 111824993B
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China
Prior art keywords
air
valve
relay
pedal
port
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CN201910307728.1A
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CN111824993A (en
Inventor
李元化
孙德宇
董维哲
谷万斌
胡毅
王继征
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Sinopec Oilfield Service Corp
Sinopec Zhongyuan Petroleum Engineering Co Ltd
No 3 Drilling Co of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Original Assignee
Sinopec Oilfield Service Corp
Sinopec Zhongyuan Petroleum Engineering Co Ltd
No 3 Drilling Co of Sinopec Zhongyuan Petroleum Engineering Co Ltd
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Application filed by Sinopec Oilfield Service Corp, Sinopec Zhongyuan Petroleum Engineering Co Ltd, No 3 Drilling Co of Sinopec Zhongyuan Petroleum Engineering Co Ltd filed Critical Sinopec Oilfield Service Corp
Priority to CN201910307728.1A priority Critical patent/CN111824993B/en
Publication of CN111824993A publication Critical patent/CN111824993A/en
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Publication of CN111824993B publication Critical patent/CN111824993B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/08—Driving gear incorporating fluid motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses an anti-misoperation device of a pneumatic winch and an operation method applying the device, which effectively avoid the misoperation of operating the pneumatic winch by an operator at will by skillfully designing and applying a button valve sheath, and standardize the operation behavior of the operator; through the hidden installation of the pedal button valve and the linkage design of the pedal button valve and the pneumatic motor handle of the pneumatic winch, the false start of the pneumatic winch is effectively avoided; through the improved design of the air cylinder and the air brake belt, and the pneumatic control interlocking design of the air cylinder and the air motor, the purposes that the air motor of the pneumatic winch has air, the air brake belt releases brake, and the air motor of the pneumatic winch does not have air and the air brake belt brakes immediately are realized, and the use safety of the pneumatic winch is effectively ensured.

Description

Anti-false starting device and operation method for pneumatic winch
Technical Field
The invention relates to the technical field of drill floor equipment for petroleum drilling rigs, in particular to an anti-false starting device of a pneumatic winch. And to a method of using the device.
Background
The pneumatic winch uses compressed air as a power source to hoist heavy objects, has the advantages of cleanness, environmental protection and high economical efficiency, and is widely applied to oil rig platforms. When the device is used, an operator pushes or pulls the air motor air inlet handle forwards or backwards, the air motor rotates, and the small winch drum rotates to wind or unwind the steel wire rope, so that the weight is lifted or lowered. The handle is arranged at the middle position, the air motor does not stop running, and the hand brake and the foot brake the roller to ensure that the weight is stopped at any position.
However, during use, it often happens that: firstly, an operator leaves the operation position of the pneumatic winch for a short time, and the hand brake or the foot brake cannot be used, so that the weight falls down unconstrained to hurt the person; secondly, because the operator is careless, when the pneumatic trolley is not used, the gate of the air inlet pipeline is not closed, and when other works are dry, the operator can easily pull the handle or hang the handle by mistake, so that the trolley is started by mistake, and accidents such as top lifting, lower smashing, hand squeezing and the like are caused; thirdly, the structural design and the site installation position of the pneumatic winch can be used for operating the pneumatic winch without the need of a station specified by an operation rule, so that potential safety hazards are extremely large. Although the field is also innovated and modified, such as a protective cover is arranged for a handle, operators leave, timely braking still cannot be realized, the field is extremely inconvenient to use, and the problems are not fundamentally solved.
In summary, how to effectively solve the potential safety hazard existing in the use process of the pneumatic winch without changing the overall structure and basic functions of the pneumatic winch becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an anti-false start device for a pneumatic winch, which effectively avoids false start of the pneumatic winch through linkage design application of a pedal button valve and a pneumatic motor handle of the pneumatic winch.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an anti-false start device for a pneumatic winch, comprising: the device comprises an air source box, a pedal button valve and a first air relay;
the air source inlet connector of the air source box is used for connecting an air supply gate of the air bottle of the machine room;
the pedal air inlet of the pedal button valve is connected with the first air outlet joint of the air source box, and the pedal air outlet of the pedal button valve is connected with the first control air port of the first air relay; the pedal button valve is normally closed, and the pedal air inlet is not communicated with the pedal air outlet; the pedal button valve is switched from a closed state to an open state when being stepped on, and the pedal air inlet and the pedal air outlet are communicated;
the first air inlet of the first air relay is connected with the second air outlet joint of the air source box, and the first working air port of the first air relay is used for being connected with the starting air supply joint of the pneumatic winch; the first air relay is normally closed, and the first air inlet is not communicated with the first working air port; the first air relay is switched from a closed state to an open state when the first control air port is filled with control air, and the first air inlet is communicated with the first working air port.
Preferably, the device further comprises a three-ventilation joint and a second air relay;
the split air inlet of the three-way air connector is connected with a pedal air outlet of the pedal button valve, the first split air outlet of the three-way air connector is connected with a first control air port of the first air relay, and the second split air port is connected with a second control air port of the second air relay;
the second air inlet of the second air relay is connected with a third exhaust joint of the air source box, and the second working air port of the second air relay is used for being connected with an air brake air inlet joint of a brake system of the pneumatic winch; the second air relay is normally open, and the second air inlet is communicated with the second working air port; the second air relay is switched from an open state to a closed state when the second control air port is filled with control air, and the second air inlet is not communicated with the second working air port.
Preferably, the present solution further provides:
under the condition of no control gas, the second internal valve assembly of the second gas relay is positioned at an initial position, a second exhaust port is blocked, and the second gas inlet is communicated with the second working gas port;
and under the condition of introducing control gas, the second internal valve assembly is pushed to move to a control position by the control gas, the second air inlet is blocked, and the second working air inlet is communicated with the second air outlet.
Preferably, the device further comprises a quick air release valve, wherein a quick air inlet of the quick air release valve is connected with a pedal air outlet of the pedal button valve, and a quick working air port of the quick air release valve is connected with a diversion air inlet of the three-way air connector; the quick release valve comprises a valve shell and a valve core with an opening; the valve core can reciprocate along the inner wall of the valve shell under the action of control gas;
under the condition that the rapid air inlet supplies control air, the valve core blocks the air outlet hole of the valve shell;
and under the condition that the quick working air port supplies control air, the valve core is reset, so that the exhaust hole of the valve housing is communicated with the quick working air port.
Preferably, the brake system further comprises an air brake mechanism; the air brake mechanism comprises:
the brake belt cylinder is arranged on the pneumatic winch base bracket;
the cylinder of the pneumatic small winch is in stretching fit with the cylinder of the braking belt.
Preferably, the present solution further provides:
under the condition of no control gas, the first internal valve assembly of the first gas relay is positioned at an initial position and blocks the first gas inlet, and the first working gas inlet is communicated with the first gas outlet;
under the condition of introducing control gas, the first internal valve assembly is pushed to move to a control position by the control gas, the first exhaust port is blocked, and the first air inlet and the first working air port) are communicated.
Preferably, the device further comprises a device box; the device box comprises a box body and an upper cover, and the box body is in overturning fit with the upper cover;
the air source box, the pedal button valve, the quick air release valve, the three-way air connector, the first air relay and the second air relay are all arranged in the box body.
Preferably, the upper cover is provided with a through hole for placing a button of the foot-operated button valve, a button valve sheath corresponding to the position of the button is arranged at the periphery of the through hole, and the button valve sheath is a toe cap.
A method of operating a pneumatic winch employing an apparatus as described above, comprising:
step S1, pressing a button of a pedal button valve, and simultaneously operating an air motor handle;
and S2, ending the operation of the air motor handle, and loosening the button of the foot button valve.
According to the technical scheme, the pneumatic winch error starting prevention device and the method for applying the device provided by the invention effectively avoid the error behavior of operating the pneumatic winch when an operator stands at will by virtue of the ingenious design and application of the push-button valve sheath, and standardize the operation behavior of the operator; through the hidden design and installation of the pedal button valve and the linkage design and application of the pedal button valve and the pneumatic motor handle of the pneumatic winch, the false start of the pneumatic winch is effectively avoided; through the improved design of the air cylinder and the air brake belt, and the pneumatic control interlocking design application of the air cylinder and the air motor, the purposes that the air brake belt can brake immediately when the air motor of the pneumatic winch rotates in an air manner and the air brake belt is released and the air motor of the pneumatic winch does not rotate in an air-free manner are achieved, and the use safety of the pneumatic winch is effectively guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a final assembly of an anti-false start device of a pneumatic winch according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of connection of pneumatic control elements of an anti-false start device for a pneumatic winch according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a pneumatic control flow under the condition that the device box 1 is not operated, according to the method for using the error starting prevention device of the pneumatic winch provided by the embodiment of the invention;
FIG. 4 is a schematic diagram of a pneumatic control flow when a push button valve is pressed down by a method for using an error start prevention device of a pneumatic winch according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a pneumatic control flow when a push button valve is reset according to the method for using the error start prevention device of the pneumatic winch according to the embodiment of the present invention;
wherein 1 is a device box, 1a is a box body, 1b is an upper cover, 1c is a starting air supply connector, 1d is a brake air supply connector, 1e is a hinge, and 1f is a handle;
2 is an air source box, 2a is an air source air inlet joint, 2d is a first air outlet joint, 2b is a second air outlet joint, and 2c is a third air outlet joint;
3 is a pedal button valve, 3a is a pedal air inlet, 3b is a pedal air outlet, 3c is a pedal air outlet, 3d is a valve body, and 3e is a button;
4 is a quick air release valve, 4a is a quick air inlet, 4b is a quick working air port, and 4c is a valve core;
5 is a three-way air connector, 5a is a split air inlet, 5b is a first split air outlet, and 5c is a second split air outlet;
6a is a first air relay, 6a1 is a first air outlet, 6a2 is a first working air port, 6a3 is a first control air port, 6a4 is a first air inlet, 6b is a second air relay, 6b1 is a second air inlet, 6b2 is a second working air port, 6b3 is a second control air port, and 6b4 is a second air outlet;
7 is a pedal button valve sheath, 8 is a brake belt cylinder, 8a is an air brake air inlet joint, 9 is an air brake belt, 10 is an air motor handle, 11 is an air motor, 11a is an air motor air inlet joint, 12 is a small winch base support, 13 is a hand brake belt, 14 is a hand brake handle, 15 is a small winch drum, and 16 is a machine room air cylinder air supply gate.
Detailed Description
The invention discloses a device for preventing a pneumatic winch from being started by mistake, which can not operate the pneumatic winch when an operator does not stand to a specified standard station; the operator leaves the pneumatic winch to automatically cut off the air intake of the pneumatic winch and automatically brake the cylinder of the pneumatic winch.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides an error starting prevention device for a pneumatic winch, which comprises the following components: the structure of the air source box 2, the foot-operated button valve 3 and the first air relay 6a can be shown by referring to fig. 1 and 2;
the air source air inlet connector 2a of the air source box 2 is used for connecting an air supply gate 16 of an air bottle of the machine room;
the pedal air inlet 3a of the pedal button valve 3 is connected to the first air outlet joint 2d of the air source box 2, and the pedal air outlet 3b of the pedal button valve 3 is connected to the first control air port 6a3 of the first air relay 6 a; the pedal button valve 3 is normally closed, and the pedal air inlet 3a is not communicated with the pedal air outlet 3 b; the pedal button valve 3 is switched from a closed state to an open state when being stepped on, and the pedal air inlet 3a is communicated with the pedal air outlet 3 b;
the first air inlet 6a4 of the first air relay 6a is connected to the second air outlet joint 2b of the air source box 2, and the first working air inlet 6a2 of the first air relay 6a is used for connecting with the starting air supply joint 1c of the pneumatic winch; the first air relay 6a is normally closed, and the first air inlet 6a4 is not communicated with the first working air port 6a 2; the first air relay 6a is switched from a closed state to an open state when the first control air port 6a3 is filled with control air, and the first air inlet 6a4 is communicated with the first working air port 6a 2.
According to the technical scheme, in the anti-misoperation starting device for the pneumatic winch, the pedal button valve is in the closed state when not stepped, so that control gas cannot be provided for the first gas relay, the passage of the first gas relay is blocked, gas cannot be supplied to the pneumatic winch, and the pneumatic winch cannot be started even if the gas motor handle is operated. Of course, the first air relay is switched into a passage to supply air to the air motor by only pressing the foot push button valve, and then the air motor handle is operated to trigger the starting of the pneumatic winch. The pneumatic winch is triggered to start by the linkage design of the pedal button valve and the pneumatic motor handle of the pneumatic winch, so that the false start of the pneumatic winch is effectively avoided.
Preferably, the device further comprises a three-way air connector 5 and a second air relay 6b, and the structure of the device can be shown with reference to fig. 2 to 5;
the split air inlet 5a of the three-way air connector 5 is connected to the pedal air outlet 3b of the pedal button valve 3, the first split air outlet 5b of the three-way air connector 5 is connected to the first control air port 6a3 of the first air relay 6a, and the second split air outlet 5c is connected to the second control air port 6b3 of the second air relay 6b, so that the pedal button valve 3 can respectively provide control air for the first air relay 6a and the second air relay 6b, and the first air relay 6a and the second air relay 6b can be controlled to be opened and closed by stepping and releasing the pedal button valve 3;
the second air inlet 6b1 of the second air relay 6b is connected to the third air outlet joint 2c of the air source box 2, and the second working air inlet 6b2 of the second air relay 6b is used for being connected with an air brake air inlet joint 8a of a brake system of the pneumatic winch;
the second air relay 6b is normally open when the second control air port 6b3 is not filled with control air, that is, when the foot-operated button valve 3 is not stepped on, the second air relay 6b is communicated with the second air inlet 6b1 and the second working air port 6b2, so that braking when the pneumatic winch is not operated is realized;
when the foot button valve 3 is pressed, the second control air port 6b3 is filled with control air to trigger the second air relay 6b to switch from an open state to a closed state, and the second air inlet 6b1 is not communicated with the second working air port 6b 2. Meanwhile, the first control air port 6a3 is introduced with control air to trigger the first air relay 6a to switch from a closed state to an open state, and the first air inlet 6a4 is communicated with the first working air port 6a2, so that the purposes that the pneumatic winch air motor 11 has air and the air brake belt 9 is loosened, and the pneumatic winch air motor 11 does not have air and the air brake belt 9 is immediately braked are ensured, and the use safety of the pneumatic winch is effectively ensured.
In this embodiment, further comprising:
under the condition of no control gas, the structure of the second relay 6b can be shown by referring to fig. 3, the second internal valve assembly of the second relay 6b is located at an initial position and blocks the second exhaust port 6b4, and the second air inlet 6b1 is communicated with the second working air port 6b2, so that the normally open state of the second relay 6b is realized, the pneumatic winch is ensured to be in a braking state when not in use, and the false start of the pneumatic winch is effectively prevented.
Under the condition of introducing control gas, the structure of the second internal valve assembly can be shown by referring to fig. 4, the second internal valve assembly is pushed to move to a control position by the control gas and blocks the second gas inlet 6b1, so that the pneumatic control interlocking design of a brake system and a gas motor is realized, the mutual influence of braking and starting is avoided, and the coordination and the cooperation work are realized; and the second working air port 6b2 is communicated with the second air outlet 6b4, so that residual air in the braking system is discharged through the second air outlet 6b4, and the braking system is released conveniently.
Specifically, the embodiment further comprises a quick air release valve 4, wherein a quick air inlet 4a of the quick air release valve 4 is connected with a pedal air outlet 3b of the pedal button valve 3, and a quick working air inlet 4b of the quick air release valve 4 is connected with a diversion air inlet 5a of the three-way air connector 5; the quick release valve 4 comprises a valve shell and a valve core 4c with an opening; the valve core 4c can reciprocate along the inner wall of the valve housing under the action of control gas;
in the case where the rapid gas inlet 4a supplies the control gas, the structure thereof may be as shown in fig. 4, and the valve body 4c blocks the gas discharge hole of the valve housing; the control gas flows to the three-way gas connector 5 through the opening of the valve core 4c, and the opening of the valve core 4c is a small flow passage hole for adjusting the gas pressure of the control gas so as to ensure that the gas pressure of the control gas port flowing into the gas relay from the gas outlet of the three-way gas connector 5 is larger than the gas pressure of the gas inlet of the gas relay, and ensure that the internal valve assembly can move to the control position.
In the case where the quick operation port 4b supplies the control gas, the structure thereof may be as shown in fig. 5, and the valve body 4c may be reset so that the exhaust hole of the valve housing communicates with the quick operation port 4 b. When the pedal button valve 3 is closed, control gas at the downstream of the pedal button valve flows back to the quick release valve 4 and is quickly discharged through the exhaust hole of the quick release valve 4, so that the synchronous switching efficiency of the first air relay 6a and the second air relay is improved, and the aim of stopping the drum of the pneumatic winch while cutting off the air supply of the pneumatic winch is fulfilled.
In order to further optimize the technical scheme, the brake system further comprises an air brake mechanism; the air brake mechanism comprises: the structure of which can be seen with reference to figure 1;
the brake belt cylinder 8 is arranged on the pneumatic winch base support 12, and an air brake air inlet joint 8a of the brake belt cylinder 8 is connected with a second working air port 6b2 of the second air relay 6 b;
the roller 15 arranged on the pneumatic winch and the air brake belt cylinder 8 are air brake belts 9 in stretching fit. One end of the air brake belt 9 is arranged on the pneumatic winch base support 12, the other end of the air brake belt is connected together through a connecting mechanism, the air brake belt is tightly wrapped on a brake drum at the right end of the pneumatic winch drum 15, and a piston rod of the brake belt cylinder 8 is connected with the connecting mechanism of the air brake belt 9. When the pneumatic winch is not used, namely the pedal button valve 3 is not stepped on, the second air relay 6b is in an open state, and then air can be supplied to the braking belt cylinder 8 in the air braking mechanism, so that the braking belt cylinder 8 stretches out of the piston rod to tighten the air braking belt 9, and automatic braking is realized. The air brake mechanism adopting the brake belt cylinder 8 and the air brake belt 9 has the characteristics of large braking force and stable braking.
In this embodiment, further comprising:
under the condition of no control gas, the structure can be shown by referring to fig. 3, the first internal valve assembly of the first gas relay 6a is positioned at the initial position and blocks the first gas inlet 6a4, so that the normally closed state of the first gas relay 6a is realized, the pneumatic winch cannot be started no matter what operation of the gas motor handle is performed when the foot-operated button valve 3 is not stepped on, and the false start of the pneumatic winch is effectively prevented. Further, the first working gas port 6a2 communicates with the first gas outlet 6a1 for exhausting gas remaining in the gas motor.
Under the condition of introducing control air, the structure of the first internal valve assembly can be shown by referring to fig. 4, the first internal valve assembly is pushed to move to a control position by the control air, the first air outlet 6a1 is blocked, the first air inlet 6a4 is communicated with the first working air outlet 6a2, so that the first air relay 6a is switched from a closed state to an open state, the air is supplied to the pneumatic winch, and the pneumatic winch can be started only when the pedal button valve 3 is pressed, and the pneumatic winch can be started by matching with the operation of an air motor handle.
Specifically, the device also comprises a device box; the device box comprises a box body 1a and an upper cover 1b; the structure of which can be seen with reference to figure 1; the box body 1a and the upper cover 1b are in overturning fit, and the device box is provided with an opening structure, so that the fixing and the installation of internal components are facilitated; the air source box 2, the foot-operated button valve 3, the quick air release valve 4, the three-way air connector 5, the first air relay 6a and the second air relay 6b are all arranged in the box body 1 a. The box body 1a is arranged to support and protect the components, so that unified management and transportation are convenient.
In this embodiment, the structure of which can be seen with reference to fig. 1, the upper cover 1b is provided with a through hole for placing the button 3e of the foot button valve 3; the periphery of the through hole is provided with a button valve sheath 7 corresponding to the position of the button 3e, and the button valve sheath 7 is of a toe cap type. Through ingenious design and application of the button valve sheath 7, the error behavior that an operator can operate the pneumatic winch at will can be effectively avoided, and the operation behavior of the operator is standardized
The present solution is further described below in connection with specific embodiments:
referring to fig. 1 and 2, an embodiment of the invention provides an anti-false start device for a pneumatic winch, which comprises a device box 1 and a brake system. The device box 1 is composed of a box body 1a and an upper cover 1 b. The box body 1a is internally provided with and fixed with an air source box 2, a pedal button valve 3, a quick air release valve 4, a three-way air connector 5 and an air relay 6, the left end of the box body 1a is welded with a starting air supply connector 1c and a brake air supply connector 1d, and the right end of the box body 1a is welded with an air source air inlet connector 2a of the air source box 2. The starting air supply connector 1c of the box body 1a is connected with the air motor air inlet connector 11a of the air motor 11 of the pneumatic winch through an air pipeline, the brake air supply connector 1d of the box body 1a is connected with the air brake air inlet connector 8a of the air brake belt cylinder 8 of the pneumatic winch through an air pipeline, and the air supply air inlet connector 2a of the air supply box 2 of the box body 1a is connected with the air supply gate 16 of the air cylinder of the machine room through an air pipeline to supply air for the use and brake of the pneumatic winch. The right end of the upper cover 1b is provided with a round hole in clearance fit with the foot-operated button valve 3, a button valve sheath 7 is welded around the round hole, and the upper cover 1b is connected with the box body 1a through a hinge 1e to form the device box 1.
Further, in this embodiment, the box body 1a of the device box 1 is internally provided with and fixed with an air source box 2, the air source box 2 is square or cylindrical tank, 4 to 6 connectors are welded around the box body, the inner diameters of the connectors are 5 to 25mm, and in this embodiment, 4 connectors are respectively an air source air inlet connector 2a, a second air outlet connector 2b, a third air outlet connector 2c and a first air outlet connector 2d. The air source air inlet joint 2a is connected with an air supply gate 16 of the air bottle of the machine room, the second air outlet joint 2b and the third air outlet joint 2c are connected with the air relay 6 through air pipelines, and the first air outlet joint 2d is connected with the foot-operated button valve 3 to supply air to the air relay 6 and the foot-operated button valve 3 respectively;
further, in this embodiment, the box body 1a of the device box 1 is internally provided with and fixed with a pedal button valve 3, the pedal button valve 3 is normally closed, and has three air ports, namely a pedal air inlet 3a, a pedal air outlet 3b and a pedal air outlet 3c, the pedal air inlet 3a is connected with the first air outlet connector 2d, and the pedal air outlet 3b is connected with the quick air inlet 4a of the quick air release valve 4. The valve body 3d is arranged and fixed in the box body 1a, and the button 3e is exposed out of the round hole of the upper cover 1b;
further, in this embodiment, the rapid air release valve 4 is installed and fixed in the box body 1a of the device box 1, the rapid air release valve 4 is a through type or an angle type, the embodiment is a through type, the diameter of the rapid air inlet 4a is equal to that of the rapid working air inlet 4b, and the inner diameter is 8mm;
further, in this embodiment, a three-way air connector 5 is fixedly installed in the box body 1a of the device box 1, the three-way air connector 5 is a right-angle three-way, the inside diameter of the connector is 8mm, the split air inlet 5a is connected with the quick-operation air port 4b, the first split air outlet 5b is connected with the first control air port 6a3 of the first air relay 6a, the second split air outlet 5c is connected with the second control air port 6b3 of the air relay 6b, and air is supplied to the first air relay 6a and the second air relay 6b respectively;
further, in the embodiment, the case body 1a of the device case 1 is internally provided with 2 to 4 gas relays 6, and the number of the gas relays 6 is 2, in the embodiment, the two gas relays are respectively a first gas relay 6a and a second gas relay 6b, the first gas relay 6a is provided with four gas ports, namely a first gas outlet 6a1, a first working gas port 6a2, a first control gas port 6a3 and a first gas inlet 6a4; the second air relay 6b has four air ports, namely a second air inlet 6b1, a second working air port 6b2, a second control air port 6b3 and a second air outlet 6b4. The first control air port 6a3 of the first air relay 6a is connected with the first diversion air outlet 5b of the three-way air connector, the first air inlet 6a4 is connected with the second air outlet connector 2b of the air source box, and the first working air port 6a2 is connected with the starting air supply connector 1c; the second control air port 6b3 of the second air relay 6b is connected with the second branch air port 5c of the three-way air connector, the second air inlet 6b1 is connected with the third air outlet connector 2c of the air source box, and the second working air port 6b2 is connected with the brake air supply connector 1d.
Further, in this embodiment, the upper cover 1b of the device box 1 is welded with a button valve sheath 7, the button valve sheath 7 is a toe cap type steel or other hard material sheath, and the arc height of the button valve sheath 7 can accommodate 24-48 yards of work shoes;
further, in this embodiment, the upper cover 1b of the device box 1 is welded with a handle 1f, which is made of rectangular or arc steel, so that the upper cover 1b can be lifted conveniently, and the internal components of the device box can be mounted and connected.
The braking system consists of an air brake and a hand brake and is used for braking in the use process and in the non-operation process of the pneumatic winch. The air brake consists of a brake belt cylinder 8 and an air brake belt 9. The hand brake consists of a hand brake belt 13 and a hand brake handle 14.
Further, in this embodiment, the air brake is composed of a brake belt cylinder 8 and an air brake belt 9, the air brake belt 9 is composed of two brake belts, one ends of the two brake belts are installed on the pneumatic winch base support 12, and the other ends of the two brake belts are connected together through a connecting mechanism, so that the air brake belt is tightly wrapped on the brake drum at the right end of the pneumatic winch drum 15. The body of the brake belt cylinder 8 is fixedly arranged on a base bracket 12 of the pneumatic winch, a piston rod of the body is connected with a connecting mechanism of the pneumatic winch belt 9, and an air brake air inlet connector 8a of the body is connected with a brake air supply connector 1d of a box body 1a of the device box 1 through an air pipeline to supply air for the brake belt cylinder 8.
The embodiment of the invention provides an anti-misoperation starting device for a pneumatic winch, which effectively avoids the misoperation of operating the pneumatic winch when an operator stands at will by virtue of ingenious design and application of a button valve sheath 7, and standardizes the operation behavior of the operator; through the hidden design and installation of the pedal button valve and the linkage design and application of the pedal button valve and the pneumatic motor handle of the pneumatic winch, the false start of the pneumatic winch is effectively avoided; through the improved design of the air cylinder and the air brake belt, and the pneumatic control interlocking design application of the air cylinder and the air motor, the purposes that the air brake belt can brake immediately when the air motor of the pneumatic winch rotates in an air manner and the air brake belt is released and the air motor of the pneumatic winch does not rotate in an air-free manner are achieved, and the use safety of the pneumatic winch is effectively guaranteed.
The embodiment of the invention also provides an operation method of the pneumatic winch, which adopts the device as described above and comprises the following steps:
step S1, pressing a button 3e of the foot button valve 3, and simultaneously operating the air motor handle 10;
step S2, the operation of the air motor handle 10 is terminated, and the button 3e of the foot button valve 3 is released.
According to the technical scheme, in the operation method of the pneumatic winch, only the button 3e of the foot-operated button valve 3 is pressed, and the pneumatic winch can be started only by operating the air motor handle 10, so that the false start of the pneumatic winch can be prevented; in addition, when the button 3e of the foot button valve 3 is released without using the pneumatic winch, the pneumatic winch can automatically brake, so that the use safety of the pneumatic winch is effectively ensured.
The operation of the present solution is further described below in connection with specific examples:
the invention further aims to provide a method for applying the device, so that the purpose that an air motor does not have air inlet and an air brake belt automatically brakes when the pneumatic trolley is not used is achieved.
Referring to fig. 3 and 4, the embodiment of the invention further provides a use method applying the device.
Step one: the brake belt cylinder 8 is installed and fixed on the pneumatic winch base bracket 12, and a piston rod of the brake belt cylinder 8 is fixedly connected with a connecting mechanism of the air brake belt 9;
step two: the pneumatic control assembly in the box body 1a of the connecting device box 1 is firstly connected with a control air pipeline: the first exhaust joint 2d of the air source box 2 is connected with the pedal air inlet 3a of the pedal button valve 3 by an 8mm rubber pipe or a copper pipe, the pedal air outlet 3b of the pedal button valve 3 is connected with the quick air inlet 4a of the quick air release valve 4, the quick working air outlet 4b of the quick air release valve 4 is connected with the split air inlet 5a of the three-way air joint 5, the first split air outlet 5b of the three-way air joint 5 is connected with the first control air outlet 6a3 of the first air relay 6a, and the second split air outlet 5c of the three-way air joint 5 is connected with the second control air outlet 6b3 of the second air relay 6 b. Then connecting a working gas path gas pipeline: connecting a second exhaust joint 2b of the air source box 2 with a first air inlet 6a4 of the first air relay 6a, connecting a first working air port 6a2 of the first air relay 6a with a starting air supply joint 1c, connecting a third exhaust joint 2c of the air source box 2 with a second air inlet 6b1 of the second air relay 6b, and connecting a second working air port 6b2 of the second air relay 6b with a brake air supply joint 1d by using a 20mm high-pressure rubber pipe;
step three: the device box 1 is fixedly arranged at the right rear lower position of the pneumatic small winch, so that when the right foot of an operator stretches into the sheath 7 of the foot push button valve 3, the handle 10 facing the pneumatic small winch and the right hand operation air motor 11 is ensured, and the left hand operation hand brake handle 14 is in a standard standing posture;
step four: the connecting device box 1 starts the air supply joint 1c and the air motor air inlet joint 11a of the air motor 11 of the pneumatic winch, and the connecting device box 1 brakes the air supply joint 1d and the air brake air inlet joint 8a of the brake belt cylinder 8 of the pneumatic winch;
step five: the air supply inlet joint 2a of the air supply box 2 in the box body 1a of the device box 1 is connected with the air supply gate 16 of the air bottle of the machine room;
step six: checking whether each connection and the pneumatic control flow are correct or not, and fastening;
step seven: opening a gas supply gate 16 of a gas cylinder of a machine room to supply gas for a gas source box 2 in a box body 1a of the device box 1, supplying compressed air in the gas source box 2 to a first gas relay 6a through a second gas discharge joint 2b, supplying gas to a third gas discharge joint 2c to the second gas relay 6b, and supplying gas to a pedal button valve 3 through a first gas discharge joint 2 d; the second control air port 6b3 of the second air relay 6b is not provided with control air, the second air inlet 6b1 is communicated with the second working air port 6b2, working air (thick arrow line in the figure) from the third air outlet joint 2c of the air source box 2 enters the brake belt cylinder 8 through an air pipeline, the second air relay 6b and the air brake air inlet joint 8a of the brake belt cylinder 8, the piston rod of the brake belt cylinder 8 stretches out, the air brake belt 9 is tensioned, and the brake when the pneumatic winch is not operated is realized;
step eight: the pedal button valve 3e is pressed down, the pedal button valve 3 is opened, the pedal air inlet 3a is communicated with the pedal air outlet 3b, the control air (thin arrow line in the figure) reaches the quick air inlet 4a of the quick air release valve 4 through the pedal air inlet 3a and the pedal air outlet 3b, then enters the quick air release valve 4, pushes the valve core 4c to block the valve shell exhaust hole, and then enters the three-way air connector 5 through the valve core 4c inner hole through the quick working air inlet 4b and the split air inlet 5a, and is divided into two paths to enter the air relay 6, so as to provide the control air for the air relay 6. One path enters the first air relay 6a through the first split air outlet 5b of the three-way air connector 5 and the first control air port 6a3 of the first air relay 6a, the internal valve assembly of the first air relay 6a is pushed to block the first air outlet 6a1, the first air inlet 6a4 and the first working air port 6a2 of the first air relay 6a are communicated, working air enters the air motor 11 through the first air inlet 6a4, the first working air port 6a2 and the device box 1 starting air supply connector 1c and the air motor air inlet connector 11a, air is supplied to the air motor 11, the air motor handle 10 is pushed forward or pulled backward, and the air motor 11 drives the small winch drum 15 to rotate, so that heavy objects are lifted or placed below; the other path enters the second air relay 6b through the second branch air outlet 5c of the three-way air connector 5 and the second control air outlet 6b3 of the second air relay 6b, the internal valve assembly is pushed to block the second air inlet 6b1, the second working air outlet 6b2 is communicated with the second air outlet 6b4, working air of the brake belt cylinder 8 is discharged through an air pipeline, the brake air supply connector 1d, the second working air outlet 6b2 and the second air outlet 6b4, a piston rod of the brake belt cylinder 8 is retracted, the air brake belt 9 leaves a brake drum of the drum 15 to be released, the operation of lifting or lowering a heavy object by the pneumatic winch is realized, and the free rotation of the drum 15 is ensured by the air brake belt 9.
Step nine: the pedal air inlet 3a and the pedal air outlet 3b of the pedal button valve 3 are closed when the button 3e is released, the control air cannot pass through the pedal button valve 3, the first air relay 6a to the first split air outlet 5b of the three-way air connector 5, the second air relay 6b to the second split air outlet 5c of the three-way air connector 5, the control air of the air pipeline of the three-way air connector 5 to the quick release valve 4 pushes the valve core 4c of the quick release valve 4 to reset and is discharged from the quick exhaust hole, the first air relay 6a does not have the control air, the internal valve assembly resets, the first air outlet 6a1 is opened, the first air inlet 6a4 is blocked, the working air cannot enter the air motor 11 through the first air relay 6a, the air motor 11 does not have the working air, the air motor 11 cannot rotate no matter whether pushing forward or backward, and the winch handle 10 is not operated even if the air motor is mistakenly operated. The second air relay 6b has no control air because the second control air port 6b3 is not controlled, the internal valve assembly resets under the pushing of working air, the second air outlet 6b4 is blocked, the second air inlet 6b1 and the second working air port 6b2 are opened, the working air enters the brake belt cylinder 8 through the third air outlet joint 2c of the air source box 2, the air pipeline, the second air inlet 6b1 of the second air relay 6b, the second working air port 6b2, the brake air supply joint 1d and the air brake air inlet joint 8a of the brake belt cylinder 8, the piston rod of the brake cylinder 8 extends out, and the brake belt 9 is pulled tightly to realize braking.
The embodiment of the invention also provides a method for applying the error starting prevention device of the pneumatic winch. When the pneumatic winch with the hand brake and the air brake is used, the pneumatic winch with the hand brake and the air brake is firstly installed and fixed on a drilling platform surface according to the standard, the assembled device box 1 is installed at the right rear lower part of the pneumatic winch, and finally the air supply gate 16 of the air bottle of the machine room, the device box 1, the air motor 11 of the pneumatic winch and the air cylinder 8 of the brake belt are connected and fixed through air pipelines. The air supply gate 16 of the air bottle of the machine room is opened to supply air for the air source box 2 of the device box 1, and at the moment, the air source box 2 is divided into three paths to provide working air sources for the first air relay 6a, the second air relay 6b and the foot-operated button valve 3. Since there is no component of the operation device box 1, the air supply to the foot button valve 3 is stopped by the foot button valve 3, and the quick release valve 4, the first air relay 6a, and the second air relay 6b are not activated by the control air. Because the first air relay 6a is normally closed, under the condition that no control air exists, the first air inlet 6a4 and the first working air port 6a2 are blocked by the internal valve assembly, at the moment, the first working air port 6a2 is communicated with the first air outlet 6a1, the pneumatic winch air motor 11 does not have working air, and at the moment, no matter the air motor handle 10 is pushed forwards or pulled backwards, the pneumatic winch does not work. However, the second air relay 6b is normally open, and under the condition that no control air exists, the second air inlet 6b1 of the second air relay 6b is communicated with the second working air port 6b2, and the working air enters the brake belt cylinder 8 through the second air inlet 6b1 of the second air relay 6b, the second working air port 6b2, the air pipeline, the brake air supply connector 1d and the air brake air inlet connector 8a to realize braking.
When the pneumatic trolley is needed, due to the arrangement of the sheath 7 of the pedal button valve 3, an operator must stand according to the standard station, and extend the right foot into the sheath 7 of the button valve to operate. The button 3e of the foot button valve 3 is stepped down to enable the valve core of the foot button valve 3 to move downwards to block the foot exhaust port 3c, at the moment, the foot air inlet 3a is communicated with the foot exhaust port 3b, control air passing through the foot button valve 3 enters the quick release valve 4, the valve core 4c of the quick release valve 4 is pushed to move left to block the exhaust port, the control air enters the three-way air connector 5 through the inner hole of the valve core, one way of the control air enters the first control air port 6a3 of the first air relay 6a, the inner valve assembly of the first air relay 6a is pushed to move downwards to block the first exhaust port 6a1, the first air inlet 6a4 is communicated with the first working air port 6a2, working air coming out of the second air outlet connector 2b of the air source box 2 enters the air motor 11 through the air pipeline and the first air inlet 6a4 of the first air relay 6a2, the starting air supply connector 1c and the air motor air inlet connector 11a of the pneumatic small winch air motor 11, and an operator can lift or lower a heavy object by operating the air motor handle 10. The other path of control gas enters the second control gas port 6b3 of the second gas relay 6b from the second branch gas outlet 5c of the three-way gas connector 5, the internal valve assembly of the second gas relay 6b is pushed to move downwards to block the second gas inlet 6b1, then the working gas of the brake belt cylinder 8 is discharged from the gas brake gas inlet connector 8a, the gas pipeline, the brake gas supply connector 1d and the second working gas port 6b2 and the second gas outlet 6b4 of the second gas relay 6b, and the gas brake belt 9 is released for braking.
When an operator leaves the pneumatic small winch and the pedal button valve 3 is reset, the pedal air outlet 3b of the pedal button valve 3 is not communicated with the pedal air outlet 3c, the control air of the pipeline from the quick air release valve 4 to the pedal button valve 3 is immediately discharged from the pedal air outlet 3c of the pedal button valve 3, the valve core of the quick air release valve 4 is reset, the exhaust holes are exposed, the control air from the first air relay 6a to the three-way air connector 5, the second air relay 6b to the three-way air connector 5 and the three-way air connector 5 to the quick air release valve 4 is discharged from the quick air outlet of the quick air release valve 4, the first air relay 6a and the second air relay 6b do not have control air, the valve assembly in the first air relay 6a is reset to block the first air inlet 6a4 of the valve assembly, the first air outlet 6a1 is opened, the working air from the air motor 11 to the first air outlet 6a1 is discharged, and the pneumatic small winch air motor 11 cannot rotate; meanwhile, the valve assembly in the second air relay 6b resets to block the second air outlet 6b4 and opens the second air inlet 6b1, so that the working air of the brake belt cylinder 8 rapidly enters the brake belt cylinder 8 from the second air inlet 6b1, the second working air outlet 6b2, the brake air supply connector 1d and the air brake air inlet connector 8a of the second air relay 6b, and the air brake belt rapidly brakes, and at the moment, the pneumatic winch cannot rotate no matter how the air motor handle 10 is mistakenly operated, so that the mistaken starting of the pneumatic winch is effectively prevented.
In summary, the device for preventing the false start of the pneumatic winch and the application method using the device provided by the embodiment of the invention effectively avoid the false behavior that an operator can operate the pneumatic winch by standing at will through the ingenious design and application of the push-button valve sheath 7, and standardize the operation behavior of the operator; through the hidden installation of the foot-operated button valve 3 and the linkage design of the foot-operated button valve 3 and the pneumatic winch air motor handle 10, the false start of the pneumatic winch is effectively avoided; through the improved design of the brake belt cylinder 8 and the air brake belt 9, and the pneumatic control interlocking design of the brake belt cylinder 8 and the air motor 11, the purposes that the air motor 11 of the pneumatic winch is pneumatic, the air brake belt 9 is released and the air motor 11 of the pneumatic winch is non-pneumatic and the air brake belt 9 is braked immediately are realized, and the use safety of the pneumatic winch is effectively ensured.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. An anti-false start device of a pneumatic winch, comprising: the device comprises an air source box (2), a pedal button valve (3) and a first air relay (6 a);
an air source air inlet joint (2 a) of the air source box (2) is used for connecting an air supply gate (16) of an air bottle of the machine room;
a pedal air inlet (3 a) of the pedal button valve (3) is connected to a first air outlet joint (2 d) of the air source box (2), and a pedal air outlet (3 b) of the pedal button valve (3) is connected to a first control air port (6 a 3) of the first air relay (6 a); the pedal button valve (3) is normally closed, and the pedal air inlet (3 a) is not communicated with the pedal air outlet (3 b); the pedal button valve (3) is switched from a closed state to an open state when being stepped on, and the pedal air inlet (3 a) is communicated with the pedal air outlet (3 b);
the first air inlet (6 a 4) of the first air relay (6 a) is connected to the second air outlet joint (2 b) of the air source box (2), and the first working air inlet (6 a 2) of the first air relay (6 a) is used for being connected with the starting air supply joint (1 c) of the pneumatic winch; the first air relay (6 a) is normally closed, and the first air inlet (6 a 4) is not communicated with the first working air port (6 a 2); the first air relay (6 a) is switched from a closed state to an open state when the first control air port (6 a 3) is filled with control air, and the first air inlet (6 a 4) is communicated with the first working air port (6 a 2);
the device also comprises a three-ventilation joint (5) and a second air relay (6 b);
a split air inlet (5 a) of the three-way air connector (5) is connected with a pedal air outlet (3 b) of the pedal button valve (3), a first split air outlet (5 b) of the three-way air connector (5) is connected with a first control air port (6 a 3) of the first air relay (6 a), and a second split air port (5 c) is connected with a second control air port (6 b 3) of the second air relay (6 b);
the second air inlet (6 b 1) of the second air relay (6 b) is connected to the third air outlet joint (2 c) of the air source box (2), and the second working air inlet (6 b 2) of the second air relay (6 b) is used for being connected with an air brake air inlet joint (8 a) of a brake system of the pneumatic winch; the second air relay (6 b) is normally open, and the second air inlet (6 b 1) is communicated with the second working air port (6 b 2); the second air relay (6 b) is switched from an open state to a closed state when the second control air port (6 b 3) is filled with control air, and the second air inlet (6 b 1) is not communicated with the second working air port (6 b 2);
the brake system also comprises an air brake mechanism; the air brake mechanism comprises:
the brake belt cylinder (8) is arranged on the pneumatic winch base bracket (12);
the cylinder (15) is arranged on the pneumatic small winch, and the cylinder (8) is an air brake belt (9) which is in stretching fit with the brake belt.
2. The device according to claim 1, characterized in that, in the absence of control gas, the second internal valve assembly of the second relay (6 b) is in the initial position and blocks the second exhaust port (6 b 4), and the second inlet port (6 b 1) communicates with the second working port (6 b 2);
under the condition of introducing control gas, the second internal valve assembly is pushed to move to a control position by the control gas, the second air inlet (6 b 1) is blocked, and the second working air port (6 b 2) is communicated with the second air outlet (6 b 4).
3. The device for preventing false start of the pneumatic winch according to claim 1, further comprising a quick release valve (4), wherein a quick air inlet (4 a) of the quick release valve (4) is connected to a pedal air outlet (3 b) of the pedal push button valve (3), and a quick working air inlet (4 b) of the quick release valve (4) is connected to a split air inlet (5 a) of the three-way air connector (5); the quick release valve (4) comprises a valve shell and a valve core (4 c) with an opening; the valve core (4 c) can reciprocate along the inner wall of the valve casing under the action of control gas;
the valve core (4 c) blocks the exhaust hole of the valve housing under the condition that the rapid air inlet (4 a) supplies control air;
the valve core (4 c) is reset under the condition that the quick operation air port (4 b) is supplied with control air, so that the exhaust hole of the valve housing is communicated with the quick operation air port (4 b).
4. The device according to claim 1, characterized in that, in the absence of control gas, the first internal valve assembly of the first relay (6 a) is in an initial position and blocks the first air inlet (6 a 4), and the first working air port (6 a 2) is in communication with the first air outlet (6 a 1);
under the condition of introducing control gas, the first internal valve assembly is pushed to move to a control position by the control gas, the first exhaust port (6 a 1) is blocked, and the first air inlet (6 a 4) is communicated with the first working air port (6 a 2).
5. The apparatus for preventing false start of a pneumatic winch according to claim 3, further comprising an apparatus box; the device box comprises a box body (1 a) and an upper cover (1 b), wherein the box body (1 a) is in overturning fit with the upper cover (1 b);
the air source box (2), the pedal button valve (3), the quick air release valve (4), the three-way air connector (5), the first air relay (6 a) and the second air relay (6 b) are all arranged in the box body (1 a).
6. The false start preventing device of a pneumatic winch according to claim 5, characterized in that the upper cover (1 b) is provided with a through hole for placing a button (3 e) of the foot-operated button valve (3), a button valve sheath (7) corresponding to the position of the button (3 e) is provided at the periphery of the through hole, and the button valve sheath (7) is a toe cap.
7. A method of operating a pneumatic winch, characterized in that it comprises the use of a device according to any one of claims 1-6, comprising:
step S1, pressing a button (3 e) of a foot button valve (3) and simultaneously operating an air motor handle (10);
and S2, ending the operation of the air motor handle (10), and loosening the button (3 e) of the foot button valve (3).
CN201910307728.1A 2019-04-16 2019-04-16 Anti-false starting device and operation method for pneumatic winch Active CN111824993B (en)

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CN2734718Y (en) * 2004-09-03 2005-10-19 山东巨菱股份有限公司 Remote air-control device for air winch
CN101417775A (en) * 2008-03-27 2009-04-29 中油特种车辆有限公司 A kind of Winch control system and method
CN202226597U (en) * 2011-07-25 2012-05-23 宝鸡通力鼎新专用汽车有限公司 Snuff-out brake mechanism of hydraulic chain transmission logging truck winch
CN202465150U (en) * 2012-02-19 2012-10-03 烟台市石油机械有限公司 Remote control integrated pneumatic control system for air winch
CN203513165U (en) * 2013-09-04 2014-04-02 中国石油集团渤海石油装备制造有限公司 Pneumatic auxiliary brake device of vehicle-mounted workover rig winch
CN205555953U (en) * 2016-04-12 2016-09-07 四川昆仑石油设备制造有限公司 Winch area gas control equipment that stops
CN107188061A (en) * 2016-03-15 2017-09-22 辽宁陆海石油装备研究院有限公司 A kind of pneumatic man-riding winch's control system
CN210313257U (en) * 2019-04-16 2020-04-14 中石化石油工程技术服务有限公司 Pneumatic small winch prevents mistake starting drive

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2734718Y (en) * 2004-09-03 2005-10-19 山东巨菱股份有限公司 Remote air-control device for air winch
CN101417775A (en) * 2008-03-27 2009-04-29 中油特种车辆有限公司 A kind of Winch control system and method
CN202226597U (en) * 2011-07-25 2012-05-23 宝鸡通力鼎新专用汽车有限公司 Snuff-out brake mechanism of hydraulic chain transmission logging truck winch
CN202465150U (en) * 2012-02-19 2012-10-03 烟台市石油机械有限公司 Remote control integrated pneumatic control system for air winch
CN203513165U (en) * 2013-09-04 2014-04-02 中国石油集团渤海石油装备制造有限公司 Pneumatic auxiliary brake device of vehicle-mounted workover rig winch
CN107188061A (en) * 2016-03-15 2017-09-22 辽宁陆海石油装备研究院有限公司 A kind of pneumatic man-riding winch's control system
CN205555953U (en) * 2016-04-12 2016-09-07 四川昆仑石油设备制造有限公司 Winch area gas control equipment that stops
CN210313257U (en) * 2019-04-16 2020-04-14 中石化石油工程技术服务有限公司 Pneumatic small winch prevents mistake starting drive

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