CN111237508B - Integral mining hydraulic multiple water-break protector - Google Patents
Integral mining hydraulic multiple water-break protector Download PDFInfo
- Publication number
- CN111237508B CN111237508B CN202010147896.1A CN202010147896A CN111237508B CN 111237508 B CN111237508 B CN 111237508B CN 202010147896 A CN202010147896 A CN 202010147896A CN 111237508 B CN111237508 B CN 111237508B
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- oil
- pressure chamber
- valve core
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- 230000001012 protector Effects 0.000 title claims abstract description 18
- 238000005065 mining Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims 1
- 239000000839 emulsion Substances 0.000 abstract description 14
- 239000003245 coal Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 71
- 238000000034 method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/008—Valve failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8636—Circuit failure, e.g. valve or hose failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/865—Prevention of failures
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Safety Valves (AREA)
Abstract
The invention provides an integrated mining hydraulic multiple water-break protector, wherein a valve body is provided with a plurality of main channels which are parallel to each other, a valve core divides the main channels into a water pressure chamber and an oil pressure chamber, a water channel and an oil channel are arranged between any upper layer and lower layer of main channels, so that the water pressure chamber and the oil pressure chamber of the upper layer and the lower layer are respectively communicated correspondingly, plugs are arranged at two ends of the main channels, and a compression spring is arranged between the plug positioned at one side of the oil pressure chamber and the valve core. The multiple water-break protector has compact structure, particularly, the emulsion motor is used for a high-power hydraulic cutting tool in a coal mine, the utilization rate of an original emulsion pump station is improved, and most importantly, the multistage pipeline effectively solves the problem that a linkage device breaks off a water machine, eliminates the potential safety hazard existing in the use of the hydraulic cutting tool, and meanwhile, the integrated structure reduces the production cost, saves energy and protects the environment and has good social and economic benefits.
Description
Technical Field
The invention belongs to a safety valve control device for mine explosion-proof construction, and particularly relates to an integrated mine hydraulic multiple water-break protector.
Background
In the underground mining working face of the mine and the workplace with explosion-proof requirement, the cutting tool is used for pneumatic cutting and hydraulic cutting, but the cooling spraying water device is forcedly equipped for cooling the saw blade and eliminating metal sparks, the pressure water in the manual spraying or air-water linkage water breaker is used for controlling the opening and closing of the air path in the prior art, the cooling spraying is operated under the working and non-working state, the water supply can be started, the shutdown is delayed for stopping water, the potential safety hazard is eliminated, but the problems are that: 1. manual water spraying is performed, and the mode has an asynchronous phenomenon in the hydraulic cutting working process; 2. the plug valve of the linkage water supply and cutting device is used for controlling the cutting power, and in the use process, once the plug valve has mechanical failure, if the water is suddenly cut off, the cutting tool still can be operated, and the potential safety hazard of spark is generated because the water is cut off at the moment; 3. the pressure of mineral oil or emulsion oil is more than ten times of the working pressure of air-water linkage, and can not be directly used, so a driving mode suitable for oil-water linkage is needed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an integrated mining hydraulic multiple water-break protector.
The invention is realized by the following technical scheme: the integrated mining hydraulic multiple water-break protector comprises a valve body, wherein the valve body is provided with a plurality of main channels which are parallel to each other, a water inlet and an oil inlet are respectively arranged at the left part and the right part of the main channel at the top layer and are communicated with the main channel, and a water outlet and an oil outlet are respectively arranged at the left part and the right part of the main channel at the bottom layer and are communicated with the main channel; the middle part of the main channel is provided with a section of narrow channel with the diameter smaller than the inner diameter of the main channel, the narrow channel is internally provided with a valve core, the valve core divides the main channel into a water pressure chamber and an oil pressure chamber, the length of the valve core is larger than the distance between an oil channel inlet and the oil pressure chamber, the diameter of the valve core positioned in the narrow channel is matched with the inner diameter of the narrow channel, the valve core positioned in the narrow channel is also provided with a section of small diameter with the diameter smaller than the inner diameter of the narrow channel, and an oil pressure communication chamber is formed between the small diameter and the narrow channel; a water channel and an oil channel are arranged between any upper layer and any lower layer of main channels, so that the water pressure chambers and the oil pressure chambers of the upper layer and the lower layer are respectively communicated correspondingly, the water channel comprises a water channel inlet and a water channel outlet, the water channel inlet is positioned in the water pressure chamber of the upper layer, the water channel outlet is positioned in the water pressure chamber of the lower layer, the oil channel comprises an oil channel inlet and an oil channel outlet, the oil channel inlet is positioned in the upper layer narrow channel, and the oil channel outlet is positioned in the oil pressure chamber of the lower layer; plugs are arranged at two ends of the main channel, and a compression spring is arranged between the plugs and the valve core.
In the scheme, the length of the valve core is larger than that of the narrow channel, the left end of the valve core is fixedly provided with the water pressure sealing plug, and the diameter of the water pressure sealing plug is matched with that of the water pressure chamber; the right end of the valve core is fixedly provided with an oil pressure sealing plug, and the diameter of the oil pressure sealing plug is larger than that of the narrow channel and smaller than that of the oil pressure chamber.
In the scheme, the hydraulic sealing plug and the hydraulic sealing plug are sleeved with the O-shaped sealing rings, a plurality of grooves are formed in the cylindrical surface of the valve core in the narrow channel, and the O-shaped sealing rings are arranged in the grooves.
In the scheme, the water pressure chamber is provided with an air-permeable plug screw for exhausting.
In the scheme, quick-change connectors are arranged on the water inlet, the oil inlet, the water outlet and the oil outlet.
In the scheme, the right end face of the valve core is provided with the spring fixing hole, the left end face of the plug positioned at one side of the oil pressure chamber is provided with the spring fixing hole, and the compression springs are arranged in the two fixing holes.
In the above scheme, the main channel is at least two layers.
Compared with the prior art, the integral mining hydraulic multiple water-break protector has the beneficial effects that: the multiple water-break protector is compact in structure and convenient to use, particularly in underground coal mines, the emulsion motor is used for a high-power hydraulic cutting tool, power comes from an emulsion pump station on a working face, an existing paved emulsion pipeline can be utilized, the utilization rate of the original emulsion pump station is improved, a special plug valve structure is suitable for high-pressure working environments such as mineral oil or emulsion oil, and the like, and most importantly, a multistage pipeline effectively solves the problem that a linkage device breaks off a water machine fault, potential safety hazards existing in the use of the hydraulic cutting tool are eliminated, meanwhile, the integrated structure reduces production cost, is energy-saving and environment-friendly, and has good social benefit and economic benefit.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of an assembled structure of the present invention;
FIG. 3 is a cross-sectional view of A-A of FIG. 2;
Fig. 4 is a cross-sectional view of B-B of fig. 2.
In the figure: 1. valve body, 2, water inlet, 3, main passage, 4, narrow passage, 5, oil inlet, 6, hydraulic chamber, 7, hydraulic plug, 8, O-ring, 9, spool, 10, hydraulic chamber, 11, minor diameter, 12, hydraulic plug, 13, hydraulic chamber, 14, compression spring, 15, plug, 16, oil passage inlet, 17, oil passage, 18, oil passage outlet, 19, water passage outlet, 20, water passage, 21, water passage inlet, 22, oil outlet, 23, water outlet, 24, quick change fitting, 25, breather plug, 26, spool spring mounting hole, 27, plug spring mounting hole.
Detailed Description
Embodiments of the integrated mining hydraulic multiple water break protector according to the present invention are described below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of the present invention. FIG. 2 is a schematic diagram of an assembled structure of the present invention; FIG. 3 is a cross-sectional view of A-A of FIG. 2; fig. 4 is a cross-sectional view of B-B of fig. 2. In the figure, the water-break protector comprises a valve body 1, wherein the valve body 1 is provided with two layers of main channels 3 which are parallel to each other, a water inlet 2 and an oil inlet 5 are respectively arranged at the left part and the right part of the main channel 3 at the top layer and are communicated with the main channel 3, and a water outlet 23 and an oil outlet 22 are respectively arranged at the left part and the right part of the main channel 3 at the bottom layer and are communicated with the main channel 3; the middle part of the main channel 3 is provided with a section of narrow channel 4 with the diameter smaller than the inner diameter of the main channel 3, the narrow channel 4 is provided with a valve core 9, the valve core 9 divides the main channel 3 into a water pressure chamber 6 and an oil pressure chamber 13, the diameter of the valve core 9 positioned in the narrow channel 4 is matched with the inner diameter of the narrow channel 4, the valve core 9 positioned in the narrow channel 4 is also provided with a section of small diameter 11 with the diameter smaller than the inner diameter of the narrow channel 9, and an oil pressure communication chamber 10 is formed between the small diameter 11 and the narrow channel 4; a water channel 20 and an oil channel 17 are arranged between the upper layer main channel 3 and the lower layer main channel 3, so that the water pressure chamber 6 and the oil pressure chamber 13 of the upper layer main channel and the lower layer main channel are respectively communicated correspondingly, the water channel 10 comprises a water channel inlet 21 and a water channel outlet 19, the water channel inlet 21 is positioned in the water pressure chamber 6 of the upper layer, the water channel outlet 19 is positioned in the water pressure chamber 6 of the lower layer, the oil channel 17 comprises an oil channel inlet 16 and an oil channel outlet 18, the oil channel inlet 16 is positioned in the upper layer narrow channel 4, and the oil channel outlet 18 is positioned in the oil pressure chamber 13 of the lower layer; plugs 15 are arranged at two ends of the main channel 3, and a compression spring 14 is arranged between the plugs 15 positioned at one side of the oil pressure chamber 13 and the valve core 9. The length of the valve core 9 is larger than that of the narrow channel 4, the left end of the valve core 9 is fixedly provided with a water pressure sealing plug 7, and the diameter of the water pressure sealing plug 7 is matched with that of the water pressure chamber 6; the right end of the valve core 9 is fixedly provided with an oil pressure sealing plug 12, and the diameter of the oil pressure sealing plug 12 is larger than the diameter of the narrow channel 4 and smaller than the diameter of the oil pressure chamber 13. The hydraulic sealing plug 7 and the hydraulic sealing plug 12 are sleeved with O-shaped sealing rings 8, a plurality of grooves are formed in the cylindrical surface of the valve core 9 in the narrow channel 4, and the O-shaped sealing rings 8 are arranged in the grooves. The hydraulic chamber 6 is provided with a gas-permeable plug screw 25 for venting. Quick-change connectors 24 are arranged on the water inlet 2, the oil inlet 5, the water outlet 23 and the oil outlet 22. The right end face of the valve core 9 is provided with a valve core spring fixing hole 26, the left end face of the plug positioned at one side of the oil pressure chamber is provided with a plug spring fixing hole 27, and the compression springs 14 are arranged in the two fixing holes.
In use, with reference to figures 1 and 2, pressurized water enters the main passage 3 in the valve body 2 from the water inlet 2, acts within the hydraulic chamber 6 and generates a hydraulic force to the right; from the oil inlet 5, the emulsion enters the main channel 3 in the valve body 2 and is isolated in the oil pressure chamber 13 by the oil pressure sealing plug 12. When the hydraulic chamber 6 is conveyed downwards through the water channel 20 to be filled with pressurized water, the diameter of the hydraulic sealing plug 7 is larger than that of the hydraulic sealing plug 12, the hydraulic sealing plug 7 can push the valve core 9 by hydraulic pressure and gradually apply force to the compression spring 14, and at this time, as shown in fig. 4, the hydraulic sealing plug 7 is positioned on the right side of the water outlet 23, and the pressurized water flows out from the water outlet 15 and is sprayed on an operation part through the spray pipe so as to prevent spark. Increasing the water pressure gradually, as shown in fig. 3, the oil pressure sealing plug 12 is pushed by the valve core 9 to move right, the oil pressure chamber 13 is communicated with the oil channel inlet 16 through the oil pressure communication chamber 10, as shown in fig. 2, and emulsion enters the lower layer oil pressure chamber 13 from the oil channel 17; in the same manner as in fig. 4, the valve spool 9 at the lower layer again communicates the oil pressure chamber 13 with the oil outlet port 22 through the oil pressure communication chamber 10, and the emulsion is sent from the oil outlet pipe to the hydraulic motor to supply the operation power.
When the valve core at the upper layer has mechanical failure, the compression spring 4 loses the regulation function, the oil pressure sealing plug 12 is clamped at the rightmost end position of the oil pressure chamber 12, if the water inlet 2 stops supplying water, the emulsion can still be conveyed from the oil channel 17 to the lower layer because the oil channel inlet 16 cannot be closed, the water pressure chamber 6 at the lower layer also loses the water pressure at the moment, but the compression spring 14 can push the oil pressure sealing plug 12, the oil pressure sealing plug 12 moves left to cut off the oil supply of the oil pressure communication chamber 10 to the oil outlet 22, the hydraulic motor stops working, thus the opening and closing of the emulsion oil way is controlled by utilizing double water-cutting linkage, the oil way can be opened only when the pressure water exists through the linkage of hydraulic oil or emulsion and spray water, the hydraulic motor can start working, the mechanical failure at any stage is ensured, if the water is stopped, the oil way stops running or can not be started.
The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, while the above-described methods and techniques may be utilized to make some changes or modifications to equivalent embodiments, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention will still fall within the scope of the technical solutions of the present invention.
Claims (7)
1. Integral mining hydraulic pressure multiple water-break protector, its characterized in that: the valve body is provided with a plurality of main channels which are parallel to each other, a water inlet and an oil inlet are respectively arranged at the left part and the right part of the main channel at the top layer and are communicated with the main channel, and a water outlet and an oil outlet are respectively arranged at the left part and the right part of the main channel at the bottom layer and are communicated with the main channel; the middle part of the main channel is provided with a section of narrow channel with the diameter smaller than the inner diameter of the main channel, the narrow channel is internally provided with a valve core, the valve core divides the main channel into a water pressure chamber and an oil pressure chamber, the length of the valve core is larger than the distance between an oil channel inlet and the oil pressure chamber, the diameter of the valve core positioned in the narrow channel is matched with the inner diameter of the narrow channel, the valve core positioned in the narrow channel is also provided with a section of small diameter with the diameter smaller than the inner diameter of the narrow channel, and an oil pressure communication chamber is formed between the small diameter and the narrow channel; a water channel and an oil channel are arranged between any upper layer and any lower layer of main channels, so that the water pressure chambers and the oil pressure chambers of the upper layer and the lower layer are respectively communicated correspondingly, the water channel comprises a water channel inlet and a water channel outlet, the water channel inlet is positioned in the water pressure chamber of the upper layer, the water channel outlet is positioned in the water pressure chamber of the lower layer, the oil channel comprises an oil channel inlet and an oil channel outlet, the oil channel inlet is positioned in the upper layer narrow channel, and the oil channel outlet is positioned in the oil pressure chamber of the lower layer; plugs are arranged at two ends of the main channel, and a compression spring is arranged between the plugs and the valve core.
2. The integrated mining hydraulic multiple water break protector of claim 1, wherein: the length of the valve core is larger than that of the narrow channel, and the left end of the valve core is fixedly provided with a water pressure sealing plug, and the diameter of the water pressure sealing plug is matched with that of the water pressure chamber; the right end of the valve core is fixedly provided with an oil pressure sealing plug, and the diameter of the oil pressure sealing plug is larger than that of the narrow channel and smaller than that of the oil pressure chamber.
3. The integrated mining hydraulic multiple water break protector of claim 2, wherein: the hydraulic sealing plug and the hydraulic sealing plug are sleeved with O-shaped sealing rings, a plurality of grooves are formed in the cylindrical surface of the valve core in the narrow channel, and the O-shaped sealing rings are arranged in the grooves.
4. The integrated mining hydraulic multiple water break protector of claim 1, wherein: the hydraulic chamber is provided with a ventilation plug screw for exhausting.
5. The integrated mining hydraulic multiple water break protector of claim 1, wherein: quick-change connectors are arranged on the water inlet, the oil inlet, the water outlet and the oil outlet.
6. The integrated mining hydraulic multiple water break protector of claim 1, wherein: the right end face of the valve core is provided with a spring fixing hole, the left end face of the plug positioned at one side of the oil pressure chamber is provided with a spring fixing hole, and compression springs are arranged in the two fixing holes.
7. The integrated mining hydraulic multiple water break protector of claim 1, wherein: the main channel is at least two layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147896.1A CN111237508B (en) | 2020-03-05 | 2020-03-05 | Integral mining hydraulic multiple water-break protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147896.1A CN111237508B (en) | 2020-03-05 | 2020-03-05 | Integral mining hydraulic multiple water-break protector |
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| Publication Number | Publication Date |
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| CN111237508A CN111237508A (en) | 2020-06-05 |
| CN111237508B true CN111237508B (en) | 2024-09-17 |
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| CN202010147896.1A Active CN111237508B (en) | 2020-03-05 | 2020-03-05 | Integral mining hydraulic multiple water-break protector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112127886B (en) * | 2020-08-19 | 2022-10-14 | 北京巧力科技有限责任公司 | Water-gas linkage handle switch and pneumatic fretsaw |
| CN114704448B (en) * | 2022-03-18 | 2024-04-30 | 合肥力威汽车油泵有限公司 | Automobile emergency pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211779180U (en) * | 2020-03-05 | 2020-10-27 | 陕西合阳风动工具有限责任公司 | Integrated mining hydraulic multiple water cut-off protector |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738661A (en) * | 1952-10-15 | 1955-10-19 | Keelavite Co Ltd | Improvements in or relating to pressure-responsive valves |
| JPS57116917A (en) * | 1981-01-13 | 1982-07-21 | Toshiba Mach Co Ltd | Compound control valve with valve for attachment |
| CN2747359Y (en) * | 2004-11-29 | 2005-12-21 | 煤炭科学研究总院太原分院 | Water sprayer for dust removing in coal execavating |
| CN100557241C (en) * | 2007-07-04 | 2009-11-04 | 浙江衢州煤矿机械总厂有限公司 | Energy saving discharge mechanism for mining emulsion power pack |
| JP6083080B2 (en) * | 2013-12-06 | 2017-02-22 | 株式会社ＢＢｅｎｇ | Still water curing lid |
| CN105464688A (en) * | 2014-08-12 | 2016-04-06 | 赵丹 | Automatic protection structure for pneumatic equipment work |
| CN204711330U (en) * | 2015-06-29 | 2015-10-21 | 北京巧力科技有限责任公司 | A kind of coal mine pneumatic belt saws dual means for protecting power device when water-break |
| WO2017088106A1 (en) * | 2015-11-24 | 2017-06-01 | 戴明文 | Power saw |
| CN207112054U (en) * | 2017-06-13 | 2018-03-16 | 石家庄灿祥机械制造有限公司 | A kind of means for protecting power device when water-break |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211779180U (en) * | 2020-03-05 | 2020-10-27 | 陕西合阳风动工具有限责任公司 | Integrated mining hydraulic multiple water cut-off protector |
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