CN107178450B - On-off oil control amplification mechanism for mining explosion-proof vehicle - Google Patents
On-off oil control amplification mechanism for mining explosion-proof vehicle Download PDFInfo
- Publication number
- CN107178450B CN107178450B CN201710491911.2A CN201710491911A CN107178450B CN 107178450 B CN107178450 B CN 107178450B CN 201710491911 A CN201710491911 A CN 201710491911A CN 107178450 B CN107178450 B CN 107178450B
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- Prior art keywords
- connecting rod
- oil
- explosion
- rod
- proof
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- 230000007246 mechanism Effects 0.000 title claims abstract description 21
- 238000005065 mining Methods 0.000 title claims abstract description 10
- 230000003321 amplification Effects 0.000 title description 4
- 238000003199 nucleic acid amplification method Methods 0.000 title description 4
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 35
- 239000003245 coal Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
The invention belongs to the technical field of amplifying mechanisms, and provides an on-off oil control amplifying mechanism for a mining explosion-proof vehicle, which aims to solve the technical problems that an explosion-proof electromagnetic valve cannot be directly arranged on an oil injection pump to control oil on and off due to the fact that the volume is large and the limit of the surrounding space of the oil injection pump is met. The invention has simple structure, convenient installation and use and flexible and reliable action, and solves the problem that the explosion-proof electromagnetic valve cannot be directly installed on the fuel injection pump to control the fuel injection pump to be turned on and off.
Description
Technical Field
The invention belongs to the technical field of amplifying mechanisms, and particularly relates to an on-off oil control amplifying mechanism for a mining explosion-proof vehicle.
Background
At present, two main starting and protecting modes of the coal mine explosion-proof vehicle are adopted, one is gas starting electric protection, and the other is electric starting electric protection. The gas-start electric protection is that an explosion-proof diesel engine uses a gas-start motor, and the running state of the explosion-proof diesel engine is monitored by adopting an electric protection device; the electric starting electric protection is that the explosion-proof diesel engine is started by using an explosion-proof motor, and the running state of the explosion-proof diesel engine is monitored by adopting an electric protection device.
The electric starting protection device for the explosion-proof vehicle dynamically monitors and protects the explosion-proof vehicle in real time through the electronic sensor, can store and memorize and dynamically monitor the surface temperature, cooling water temperature, exhaust temperature, engine oil pressure, vehicle speed and other performance parameters of the explosion-proof diesel engine, and has the advantages of high automation degree, sensitivity, reliability, high safety and the like.
On the explosion-proof vehicle of electric starting electric protection, because there is not the air supply, namely under the condition of not taking the air compressor, all be through explosion-proof solenoid valve electricity and outage control explosion-proof diesel engine fuel injection pump's fuel feeding and fuel cut-off to realize explosion-proof vehicle's start and flameout shut down purpose.
Because the explosion-proof electromagnetic valve is an electronic product, the explosion-proof protective body is required to be additionally arranged outside the explosion-proof electromagnetic valve when the explosion-proof electromagnetic valve is used underground a coal mine, so the volume is relatively large. The explosion-proof vehicle is limited by the height, width, turning radius and other dimensions of a coal mine underground roadway, the overall dimension of the explosion-proof vehicle is not too large, the explosion-proof requirement of the coal mine must be met, and because the volume of each explosion-proof component is relatively large, the overall requirement of the explosion-proof vehicle is compact in structure, the space between the components is relatively small, so that the peripheral space of an oil injection pump on-off actuating mechanism of an explosion-proof diesel engine is narrow, an explosion-proof electromagnetic valve cannot be directly arranged on the oil injection pump on-off actuating mechanism, and a set of connecting rod amplifying mechanism is required to be designed to guide the explosion-proof electromagnetic valve to the outside to control the oil injection pump on-off actuating mechanism.
Disclosure of Invention
The invention provides an on-off oil control amplifying mechanism for a mining explosion-proof vehicle, which aims to solve the technical problems that an explosion-proof electromagnetic valve cannot be directly arranged on an oil injection pump to control the oil on-off of the oil injection pump due to the fact that the volume is large and the limit of the surrounding space of the oil injection pump is met.
The technical scheme adopted by the invention is as follows:
the on-off oil control amplifying mechanism for the mining explosion-proof vehicle comprises an on-off oil support, an adjusting rod, a long connecting rod, a connecting rod fixing support, a reset spring and a fixing seat, wherein the on-off oil support is of a 3-shaped structure as a whole and comprises three fixing fulcrums, one fixing fulcrums is connected with an air inlet and outlet manifold, and the other two fixing fulcrums are respectively connected with an engine cylinder body; the explosion-proof solenoid valve fixed mounting is on breaking oil support, the upper end of adjusting the pole is vertical to be installed in explosion-proof solenoid valve, the lower extreme of adjusting the pole and the upper end threaded connection of long connecting rod, the fixing base is installed on the injection pump, the slide bar passes through the sealing washer and vertically installs in the fixing base, the lower extreme of slide bar links to each other with the ejector pin head, connecting rod fixed bolster is installed on the engine cylinder body, the right-hand member of connecting rod links to each other with the lower extreme of long connecting rod through round pin axle II, the left end of connecting rod links to each other with the upper end of slide bar through round pin axle III, the middle part of connecting rod is fixed on connecting rod fixed bolster through round pin axle I, reset spring's upper end and break-make oil support connection, the lower extreme is connected with the connecting rod.
And a nut is arranged at the joint of the adjusting rod and the long connecting rod.
The fixing seat is installed on the fuel injection pump in a threaded connection mode.
The invention has the beneficial effects that:
1. the invention has simple structure, convenient installation and use and flexible and reliable action, and solves the problem that the explosion-proof electromagnetic valve cannot be directly installed on the fuel injection pump to control the fuel injection pump to be opened and closed because the explosion-proof electromagnetic valve has larger volume and smaller peripheral space of the fuel injection pump of the explosion-proof diesel engine.
2. According to the invention, through the relative angle and the movement of the connecting rods after being installed, the linear movement of the sliding rod of the fuel injection pump can be effectively controlled, the amplification of the control force from the electromagnetic force of the explosion-proof electromagnetic valve to the fuel injection pump on-off action is effectively realized, and the stability of the fuel injection pump on-off control of the explosion-proof diesel engine is ensured.
Drawings
FIG. 1 is a schematic diagram of an explosion-proof vehicle control amplification mechanism of the present invention;
in the figure: 1-bolt, 2-adjusting rod, 3-nut, 4-long connecting rod, 5-reset spring, 6-connecting rod fixed bolster, 7-round pin axle I, 8-round pin axle II, 9-round pin axle III, 10-connecting rod, 11-slide bar, 12-fixing base, 13-intake and exhaust manifold, 14-sealing washer, 15-make-break oil support, 16-explosion-proof solenoid valve, 17-ejector pin head, 18-injection pump, 19-engine cylinder body.
Detailed Description
As shown in fig. 1, the on-off oil control amplifying mechanism for the mining explosion-proof vehicle comprises an on-off oil bracket 15, an adjusting rod 2, a long connecting rod 4, a connecting rod 10, a connecting rod fixing bracket 6, a return spring 5 and a fixing seat 12, wherein the on-off oil bracket 15 is of a 3-shaped structure as a whole and comprises three fixing fulcrums, one fixing fulcrums is connected with an air inlet manifold 13 through a bolt 1, and the other two fixing fulcrums are respectively connected with an engine cylinder 19 through bolts 1; the explosion-proof solenoid valve 16 is fixedly arranged on the oil opening and closing bracket 15, the upper end of the adjusting rod 2 is vertically arranged in the explosion-proof solenoid valve 16, the lower end of the adjusting rod 2 is in threaded connection with the upper end of the long connecting rod 4, the fixed seat 12 is arranged on the oil injection pump 18, the sliding rod 11 is vertically arranged in the fixed seat 12 through the sealing ring 14, the lower end of the sliding rod 11 is connected with the ejector rod head 17, the connecting rod fixing bracket 6 is arranged on the engine cylinder body 19, the right end of the connecting rod 10 is connected with the lower end of the long connecting rod 4 through the pin shaft II8, the left end of the connecting rod 10 is connected with the upper end of the sliding rod 11 through the pin shaft III9, the middle part of the connecting rod 10 is fixed on the connecting rod fixing bracket 6 through the pin shaft I7, the upper end of the return spring 5 is connected with the oil opening and closing bracket 15, the lower end of the return spring 5 is connected with the connecting rod 10, and the initial state of the return spring 5 is in a free state.
One end of the adjusting rod 2 is connected with the long connecting rod 4 through threads, the adjusting rod 2 is locked by a nut, the adjusting rod 2 and the long connecting rod 4 are prevented from rotating mutually, the other end of the adjusting rod is arranged in an explosion-proof electromagnetic valve, and the explosion-proof electromagnetic valve controls the up-and-down movement of the adjusting rod 2 through the movement of an internal mechanism of the explosion-proof electromagnetic valve when the explosion-proof electromagnetic valve is electrified and powered off, so that the relative movement of the whole connecting rod structure is driven.
The fixed seat 12 is arranged on the fuel injection pump 18 through threads, the sliding rod 11 is arranged in the fixed seat 12 through the double sealing rings 14, the ejector rod head 17 is in tight fit with the sliding rod 11, the sliding rod 11 reciprocates up and down in the fixed seat 12, the ejector rod head 17 moves up and down to open and close an oil port of the fuel injection pump 18, and the oil-through and oil-cut actions of the fuel injection pump 18 are controlled, so that the starting and flameout shutdown of the explosion-proof vehicle are completed.
The oil on-off support 15 is of a welding structure, the special angle design of the oil on-off support 15 and the coordination of the oil on-off support 15 and the connecting rod fixing support 6 ensure that the movement direction of the adjusting rod 2 is converted into the vertical movement of the sliding rod 11 and the ejector rod head 17 through the connecting rod 10, so that the oil on-off support is flexible in action, and the ejector rod head 17 is balanced in stress when moving up and down in the fixing seat 12, the sealing ring 14 is prevented from damaging oil leakage, and the oil injection pump cannot work normally.
The electromagnetic force amplifying mechanism of the explosion-proof electromagnetic valve is realized through the design of the connecting rod 10 and the connection of the connecting rod 10, the long connecting rod 4 and the sliding rod 11, the amplifying ratio depends on the position of a hinge point, namely a pin shaft I7, and the force amplifying multiple is the ratio of the distance from the pin shaft I7 (hinge point) to the vertical line of the axis of the adjusting rod 2 to the distance from the pin shaft I7 (hinge point) to the sliding rod 11.
The working principle process of the invention is as follows: when the explosion-proof vehicle power switch is turned on, the electronic protection device performs self-checking before the vehicle is started. After all works normally, the explosion-proof electromagnetic valve is electrified, the internal telescopic mechanism moves to drive the adjusting rod 2 to move downwards smoothly, the sliding rod 11 is connected with the long connecting rod 4 into a whole, the long connecting rod 4 moves downwards, the connecting rod 10 rotates clockwise by taking the pin shaft I7 as a center, the right end moves downwards, the left end moves upwards, the left end drives the sliding rod 11 to move upwards, the top rod head 17 also moves upwards along with the sliding rod, a fuel injection port channel of the explosion-proof diesel engine fuel injection pump 18 is opened, the fuel injection pump is in a fuel injection action, the starting of an explosion-proof vehicle is completed, and the reset spring 5 is in a stretching state. When the explosion-proof electromagnetic valve is powered off, the downward force acting on the adjusting rod 2 disappears, the adjusting rod 2 and the long connecting rod 4 move upwards under the action of the tension force of the return spring 5, the connecting rod 10 rotates anticlockwise by taking the pin shaft I7 as a central line, namely the right end moves upwards, the left end moves downwards, the sliding rod 11 and the ejector rod head 17 also move downwards along with the upward force, an oil port channel of an oil injection pump is closed, the oil interruption action of the oil injection pump is carried out, and flameout and shutdown of the explosion-proof vehicle are completed.
The on-off oil control amplifying mechanism of the explosion-proof vehicle is convenient to install, novel in structure, flexible and reliable in action, and reliable and convenient to apply to explosion-proof vehicles which are electrically started and electrically protected and have a relatively narrow surrounding space of an oil injection pump of an explosion-proof diesel engine.
Claims (3)
1. An on-off oil control amplifying mechanism for a mining explosion-proof vehicle is characterized in that: the oil-saving device comprises an explosion-proof electromagnetic valve (16), an oil-switching bracket (15), an adjusting rod (2), a long connecting rod (4), a connecting rod (10), a connecting rod fixing bracket (6), a reset spring (5) and a fixing seat (12), wherein the oil-switching bracket (15) is of a 3-shaped structure as a whole and comprises three fixing fulcrums, one fixing fulcrums is connected with an air inlet and outlet manifold (13), and the other two fixing fulcrums are respectively connected with an engine cylinder (19); the anti-explosion electromagnetic valve (16) is fixedly arranged on the oil opening and closing support (15), the upper end of the adjusting rod (2) is vertically arranged in the anti-explosion electromagnetic valve (16), the lower end of the adjusting rod (2) is in threaded connection with the upper end of the long connecting rod (4), the fixing base (12) is arranged on the oil injection pump (18), the sliding rod (11) is vertically arranged in the fixing base (12) through the sealing ring (14), the lower end of the sliding rod (11) is connected with the top rod head (17), the top rod head (17) is in tight fit with the sliding rod (11), the sliding rod (11) reciprocates up and down in the fixing base (12), the top rod head (17) moves up and down to open and close an oil port of the oil injection pump (18), the connecting rod fixing support (6) is arranged on the engine cylinder body (19), the right end of the connecting rod (10) is connected with the lower end of the long connecting rod (4) through the pin shaft II (8), the left end of the connecting rod (10) is connected with the upper end of the sliding rod (11) through the pin shaft III (9), the middle part (10) is connected with the upper end of the sliding rod (11) through the pin shaft I (7) and the connecting rod (5) is connected with the upper end of the connecting rod (5).
2. The on-off oil control amplifying mechanism for mining explosion-proof vehicle according to claim 1, wherein: the joint of the adjusting rod (2) and the long connecting rod (4) is provided with a nut (3).
3. The on-off oil control amplifying mechanism for mining explosion-proof vehicle according to claim 1 or 2, wherein: the fixing seat (12) is installed on the fuel injection pump (18) in a threaded connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710491911.2A CN107178450B (en) | 2017-06-26 | 2017-06-26 | On-off oil control amplification mechanism for mining explosion-proof vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710491911.2A CN107178450B (en) | 2017-06-26 | 2017-06-26 | On-off oil control amplification mechanism for mining explosion-proof vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107178450A CN107178450A (en) | 2017-09-19 |
| CN107178450B true CN107178450B (en) | 2023-07-25 |
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ID=59845361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710491911.2A Active CN107178450B (en) | 2017-06-26 | 2017-06-26 | On-off oil control amplification mechanism for mining explosion-proof vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107178450B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159161A1 (en) * | 1984-03-30 | 1985-10-23 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling an engine in an hydraulically driven vehicle |
| CN101225771A (en) * | 2007-11-29 | 2008-07-23 | 哈尔滨工程大学 | Speed regulating device for double pulse mechanical hydraulic-pressure type diesel engine |
| CN202790829U (en) * | 2012-09-26 | 2013-03-13 | 东风汽车股份有限公司 | Pneumatic switch device of mining explosion-proof diesel engine |
| CN204436600U (en) * | 2015-02-10 | 2015-07-01 | 陕西重型汽车有限公司 | A kind of speed-limiting device for vehicles |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB156185A (en) * | 1920-01-03 | 1922-05-03 | Simon Koiransky | Improvements in internal combustion engines |
| GB261598A (en) * | 1926-02-19 | 1926-11-25 | George Lascelles Kirk | Improvements in and relating to fuel pumps for airless injection oil engines |
| GB473140A (en) * | 1936-04-06 | 1937-10-06 | Laundry Automatic Appliances L | Improvements in or relating to electro-magnetically operated valves |
| JPH07103096A (en) * | 1993-10-07 | 1995-04-18 | Hino Motors Ltd | Fuel injection method for internal combustion engine and variable capacity type common fuel surge tank |
| CN201100188Y (en) * | 2007-08-24 | 2008-08-13 | 重庆市求精车用调压器厂 | Wind blocking gate automatic control device for gasoline engine |
| CN201662468U (en) * | 2010-04-02 | 2010-12-01 | 中国海洋石油总公司 | Explosion-proof limit breathe test device |
| CN201771604U (en) * | 2010-09-15 | 2011-03-23 | 三一重型装备有限公司 | Double stop device |
| CN202300760U (en) * | 2011-09-30 | 2012-07-04 | 广西玉柴机器股份有限公司 | Engine injection pump assembly |
| CN202510265U (en) * | 2012-03-29 | 2012-10-31 | 江西直方数控动力有限公司 | Direct synthesis injection pump of mine electrical unit |
| US20140054480A1 (en) * | 2012-08-22 | 2014-02-27 | Jack R. Taylor | Solenoid-controlled rotary intake and exhaust valves for internal combustion engines |
| CN103256160B (en) * | 2013-04-28 | 2015-05-20 | 哈尔滨工程大学 | Diesel engine cylinder row fuel cut-off device |
| CN204312234U (en) * | 2014-11-20 | 2015-05-06 | 江西直方数控动力有限公司 | A kind of embedded electronically controlled unit pump with explosion prevention function |
| CN207018126U (en) * | 2017-06-26 | 2018-02-16 | 中国煤炭科工集团太原研究院有限公司 | A kind of logical fuel cut-off control enlarger of mine anti-explosion vehicle |
-
2017
- 2017-06-26 CN CN201710491911.2A patent/CN107178450B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159161A1 (en) * | 1984-03-30 | 1985-10-23 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling an engine in an hydraulically driven vehicle |
| CN101225771A (en) * | 2007-11-29 | 2008-07-23 | 哈尔滨工程大学 | Speed regulating device for double pulse mechanical hydraulic-pressure type diesel engine |
| CN202790829U (en) * | 2012-09-26 | 2013-03-13 | 东风汽车股份有限公司 | Pneumatic switch device of mining explosion-proof diesel engine |
| CN204436600U (en) * | 2015-02-10 | 2015-07-01 | 陕西重型汽车有限公司 | A kind of speed-limiting device for vehicles |
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| Publication number | Publication date |
|---|---|
| CN107178450A (en) | 2017-09-19 |
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