CN104864124B - Oil gas moment switching device and its working method - Google Patents
Oil gas moment switching device and its working method Download PDFInfo
- Publication number
- CN104864124B CN104864124B CN201510286703.XA CN201510286703A CN104864124B CN 104864124 B CN104864124 B CN 104864124B CN 201510286703 A CN201510286703 A CN 201510286703A CN 104864124 B CN104864124 B CN 104864124B
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- Prior art keywords
- valve
- ball
- valve ball
- microswitch
- pipe joint
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Classifications
-
- 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
- F16K11/14—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 one actuating member, e.g. a handle
- F16K11/16—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 one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane
- F16K11/163—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 one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane only turns
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- 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
- F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
- F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Taps Or Cocks (AREA)
Abstract
The present invention relates to a kind of oil gas moment switching device and its working method, it is mainly used in controlling the state switching of oil-gas two-way carburetor.It mainly includes valve body, valve rod, valve seat and microswitch, and valve rod is arranged on valve body；It is provided with valve rod on the first valve ball and the second valve ball, valve body and is provided with inlet connector, flowline connection to subsea, air inlet pipe joint and outlet pipe joint；Valve seat is separately mounted on the inner end of inlet connector, flowline connection to subsea, air inlet pipe joint and outlet pipe joint, and is engaged respectively with the first valve ball and the second valve ball；The open/close states of first valve ball and the second valve ball are opposite；Microswitch is arranged in the outside wall surface of valve body, and driving lever and handle are provided with the control end of valve rod, rotates handle, and the seesaw on microswitch can be suppressed or unclamped to driving lever.When the first valve ball, which is switched, to be opened, microswitch is powered, conversely, be then powered off.Carburetor oil can be just realized by rotary handle and is switched with the moment of gas two states, it is easy to operate.
Description
Technical field
The present invention relates to a kind of oil gas moment switching device and its working method, it is mainly used in the double fuel of oil-gas two-way
On generator.
Background technology
Dual fuel engine is that one kind can use Fuel Petroleum and LP gas fuel as fuel novel electricity generator,
It has high-efficiency low-pollution draining technology feature, there is good development prospect.
Double fuel engine unit includes dual fuel engine and the generator being connected with dual fuel engine, however,
Existing double fuel engine unit when in use, because burnt gas switch is closer to fuel cock position, and is not protected
, often there is burnt gas switch and fuel oil oil circuit breaker while the situation being opened, different combustions because of the maloperation of user in measure
Material enters engine mixed combustion simultaneously, can cause engine operation irregularity, fluctuation of service, and can produce dangerous flame
Deng the security performance to generating set causes to have a strong impact on.
In order to solve the above problems, those skilled in the art devise a kind of double fuel engine unit switching mechanism（Patent
Number be 2,014 2 0141774. 1）, it includes：Panel, the appropriate location for being installed on engine；LPG rotary switches；Fuel oil
Oil circuit breaker；Stopper slot is respectively provided with two lateral margins up and down of the panel, sets one to latch in each stopper slot；Switch handle,
It is stuck in by the lock in the stopper slot；The LPG rotary switches and fuel oil oil circuit breaker are fixed on the panel side by side
The same face；The another side of the panel is additionally provided with a microswitch, solenoid valve controller and connecting line, the microswitch
With a seesaw, the seesaw can be suppressed or unclamp by sliding the switching handle；Fuel oil oil circuit breaker and LPG constructions of switch are formed
A kind of mistake proofing design, ensure that two switches can not prevent user's faulty operation and cause two kinds of different combustions while open
Material enters blender simultaneously, it is to avoid cause the situation of generator abnormal work to occur.
Above-mentioned double fuel engine unit switching mechanism is only a kind of mistake proofing design, although it ensure that two switches not by
Open simultaneously, but it once switches the multi-step operation for needing to switch over handle and switch so that the switching of fuel oil and combustion gas
It is sufficiently complex that operation becomes, and switch speed is slow.
The content of the invention
Based on above-mentioned the deficiencies in the prior art, the present invention provides a kind of oil gas moment switching device and its working method, should
Device not only can avoid fuel cock and burnt gas switch while being opened, additionally it is possible to realize being switched fast for fuel oil and combustion gas,
And only need once-through operation to act, operate very easy.
The oil gas moment switching device mainly includes valve body, valve rod, valve seat and microswitch etc..The valve rod is arranged on valve
On body；The first valve ball and the second valve ball are provided with the valve rod, is set on the valve body corresponding with the first valve ball installation site
There are inlet connector and flowline connection to subsea, air inlet pipe joint is provided with the valve body corresponding with the second valve ball installation site and is gone out
Gas-tpe fitting；The valve seat is separately mounted to the inner of inlet connector, flowline connection to subsea, air inlet pipe joint and outlet pipe joint
In portion, and it is engaged respectively with the first valve ball and the second valve ball；The open/close states of first valve ball and the second valve ball are opposite；Institute
Microswitch is stated in the outside wall surface of valve body, driving lever and handle are installed in the control end of the valve rod, handle, institute is rotated
The seesaw on microswitch can be suppressed or unclamp by stating driving lever.
It is respectively arranged with to strengthen on the air-tightness between the second valve ball and valve body, the valve rod of the second valve ball both sides
Sealing ring is installed, the sealing ring periphery contradicts the internal face in valve body in sealing ring mounting groove, the sealing ring mounting groove
On.
In order that valve rod rotates more smooth and improves integrally-built reliability, between the valve rod and valve interior wall
It is provided with bearing.Bearing can be positioned by the end cap on the shaft shoulder and valve body on valve rod.The optional common depth of bearing
Ditch ball bearing, in the case where meeting working condition requirement, its price is relatively cheap.It should be understood that the invention is not limited in using only
Deep groove ball bearing, can also be from other bearings.
For valve body, the structural form of valve body can be with varied.But in view of integrally-built compactedness, the valve body
It may be designed as being vertically arranged with valve rod installation through-hole, the upper surface of the valve body and following table in the middle part of cuboid valve body, the valve body
Face is respectively arranged with two pipe interfaces, and the inlet connector, flowline connection to subsea, air inlet pipe joint are corresponding with outlet pipe joint
On pipe interface.
The premise for realizing the switching of oil gas moment is that the open/close states of first valve ball and the second valve ball must be opposite.But
Realize that being configured with for above-mentioned this purpose is a lot, as long as the through hole of that is, described first valve ball and the second valve ball mutually staggers i.e. completely
Can.But consider for the reasonability of overall construction design, the through-bore axis on first valve ball and the second valve ball is mutually perpendicular to.
It should be understood that the invention is not limited in a kind of this situation.
Reasonability for valve rod mounting design considers, driving lever mounting hole is provided with the control end of the valve rod, described
Driving lever is vertically mounted on the driving lever mounting hole of valve rod control end.
The working method of above-mentioned oil gas moment switching device：By the flowline connection to subsea and escape pipe of oil gas moment switching device
Joint is respectively connecting to carburetor, and the inlet connector and air inlet pipe joint of oil gas moment switching device are connected into oil sources respectively
And source of the gas；The microswitch is also connected with the magnetic valve on carburetor, the keying for controlling magnetic valve.The magnetic valve is
Normally closed solenoid valve.Because the first valve ball, the second valve ball and microswitch mutually link.
（1）Handle is rotated, when the second valve ball is opened, the first valve ball is closed, and inlet channel is unimpeded, and oil inlet passage is then closed
Close；Simultaneously, driving lever unclamps the closed electromagnetic valve on the seesaw of microswitch, microswitch power-off, carburetor.Now, change
Oily device provides the combustion gas of fuel for engine.
（2）Handle is rotated, when the first valve ball is opened, the second valve ball is closed, and oil inlet passage is unimpeded, and inlet channel is then closed
Close；Simultaneously, driving lever suppresses the seesaw of microswitch, and microswitch is powered, and the magnetic valve on carburetor is opened, now, is changed
It is fuel oil that oily device provides fuel for engine.
In terms of existing technologies, the first valve ball and the second valve ball of the oil gas moment switching device are co-located on one
On root valve rod, and their open/close states are on the contrary, the first valve ball and the second valve ball can directly be avoided while being opened, it is to avoid no
Same fuel enters engine mixed combustion simultaneously, it is ensured that the normal work of engine and stable operation, also improves simultaneously
The security performance of generating set.In addition, the first valve ball and the second valve ball of the oil gas moment switching device are co-located on one
On valve rod, and valve rod mutually links with microswitch, need to only operate a handle just can be while realize coordinated signals, oil gas
Handover operation is very quick, easy.
Brief description of the drawings
Fig. 1 is the top view of valve body in embodiment.
Fig. 2 is the front section view of valve body in embodiment.
Fig. 3 is the mounting structure schematic diagram of valve rod and bearing in embodiment.
Fig. 4 is the mounting structure sectional view of valve body and valve rod in embodiment.
Fig. 5 is the oil gas moment switching device sectional view for only installing flowline connection to subsea.
Fig. 6 is the sectional view of oil gas moment switching device in embodiment.
Fig. 7 is oil gas moment switching device front view in embodiment.
Fig. 8 is oil gas moment switching device top view in embodiment.
Label declaration：1- valve body 2- valve rod 3- valve seat 4- microswitch 5- valve rod installation through-hole 6- pipelines
Interface 7- inlet connector 8- flowline connection to subsea 9- air inlet pipe joint 10- outlet pipe joint the first valve balls of 11-
12- the second valve ball 13- driving lever 14- handle 15- seesaw 16- sealing ring 17- bearing 18- shaft shoulder 19- ends
Lid.
Embodiment
In order that the above-mentioned technology contents and construction features of the present invention can be more easily by persons skilled in the art institutes
Understand, below in conjunction with the accompanying drawings with technical essential to the application further instruction.
The oil gas moment switching device mainly includes valve body 1, valve rod 2, valve seat 3 and microswitch 4 etc..
The structural form of valve body can be with varied.But in view of integrally-built compactedness, in the present embodiment, by institute
State valve body 1 and be designed as cuboid valve body, the middle part of valve body 1 is vertically arranged with valve rod installation through-hole 5, the upper table of the valve body 1
Face and lower surface are respectively arranged with two pipe interfaces 6, i.e., a total of four pipe interfaces.The pipe interface 6 is to be provided with
The screwed hole of internal thread, is easily installed inlet connector 7, flowline connection to subsea 8, air inlet pipe joint 9 and outlet pipe joint 10.
The valve rod 2 is arranged on the valve rod installation through-hole 5 of valve body 1.
The first valve ball 11 and the second valve ball 12 have been arranged in series on the valve rod 2, it is relative with the installation site of the first valve ball 11
Inlet connector 7 and flowline connection to subsea 8 are provided with the valve body answered, is set on the valve body corresponding with the installation site of the second valve ball 12
It is equipped with air inlet pipe joint 9 and outlet pipe joint 10.
The valve seat 3 is separately mounted to inlet connector 7, flowline connection to subsea 8, air inlet pipe joint 9 and outlet pipe joint 10
Inner end on, and be engaged respectively with the first valve ball 11 and the second valve ball 12.
The premise for realizing the switching of oil gas moment is that the open/close states of the valve ball 12 of the first valve ball 11 and second must phase
Instead.But realizing the mode of above-mentioned this purpose has a lot, for example：As long as the through hole of the first valve ball 11 and the second valve ball 12 is mutually complete
It is completely wrong to open.But consider for the reasonability of overall construction design, the through hole on the valve ball 12 of the first valve ball 11 and second
Axis is mutually perpendicular to.Specific in the present embodiment, as shown in Figures 3 to 6, the through hole of the first valve ball 11 is fore-and-aft direction, and
The through hole of second valve ball 12 is above-below direction.It should be understood that the invention is not limited in orthogonal situation.
The microswitch 4 is arranged in the outside wall surface of valve body 1, close to the position of the control end of valve rod 2.
Driving lever 13 and handle 14 be installed in the control end of the valve rod 2, handle 14 is rotated, the driving lever 13 can suppress or
Unclamp the seesaw 15 on microswitch 4.
It is all provided with to strengthen on the air-tightness between the second valve ball 12 and valve body 1, the valve rod 2 of the both sides of the second valve ball 12
It is equipped with sealing ring mounting groove, the sealing ring mounting groove and sealing ring 16 is installed, the sealing ring periphery is contradicted in valve body
On internal face.
In order that valve rod rotates more smooth and improves integrally-built reliability, between the valve rod and valve interior wall
It is provided with bearing 17.Bearing 17 can be positioned by the end cap 19 on the shaft shoulder 18 and valve body on valve rod 2.Bearing is optional
Common deep groove ball bearing, in the case where meeting working condition requirement, its price is relatively cheap.It should be understood that the present invention does not limit to
In using only deep groove ball bearing, other bearings can also be selected.
Reasonability for valve rod mounting design considers, driving lever mounting hole is provided with the control end of the valve rod, described
Driving lever is vertically mounted on the driving lever mounting hole of valve rod control end.Described driving lever mounting hole is screwed hole, the peace of the driving lever
Dress end is provided with the external screw thread coordinated with the screwed hole.
The course of work of the present invention：In use, by the flowline connection to subsea 8 and outlet pipe joint 10 of oil gas moment switching device
Carburetor is respectively connecting to, it is gentle that the inlet connector 7 and air inlet pipe joint 9 of oil gas moment switching device are connected into oil sources respectively
Source；The microswitch is also connected with the magnetic valve on carburetor, the keying for controlling magnetic valve, and the magnetic valve is normally closed
Magnetic valve.
Because the first valve ball 11, the second valve ball 12 and microswitch 4 mutually link.
Handle 14 is rotated, when the second valve ball 12 is opened, the first valve ball 11 is closed, the station as shown in Fig. 3 to Fig. 6,
Inlet channel is unimpeded, and oil inlet passage is then closed；Simultaneously, driving lever 13 unclamps the seesaw 15 of microswitch 4, microswitch 4
Closed electromagnetic valve on power-off, carburetor.Now, carburetor provides the combustion gas of fuel for engine.
Handle 14 is rotated, when the first valve ball 11 is opened, the second valve ball 12 is closed, and oil inlet passage is unimpeded, and inlet channel is then
Close；Simultaneously, driving lever 13 suppresses the seesaw 15 of microswitch 4, and microswitch is powered, and the magnetic valve on carburetor is opened,
Now, it is fuel oil that carburetor provides fuel for engine.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
In art field, the scope of patent protection for being included in the present invention.
Claims (4)
1. a kind of oil gas moment switching device, it mainly includes valve body, valve rod, valve seat and microswitch, it is characterised in that：
The valve body is to be vertically arranged with valve rod installation through-hole, the upper surface of the valve body in the middle part of cuboid valve body, the valve body
Two pipe interfaces, inlet connector, flowline connection to subsea, air inlet pipe joint and outlet pipe joint pair are respectively arranged with lower surface
It should be arranged on pipe interface；
The valve rod is arranged on valve body；The first valve ball and the second valve ball, the first valve ball and the second valve are provided with the valve rod
Ball is co-located on a valve rod；Sealing ring mounting groove is respectively arranged with the valve rod of the second valve ball both sides, it is described close
Sealing ring is installed, the sealing ring periphery is contradicted on the internal face of valve body on seal mounting groove；In the valve rod and valve body
Bearing is provided between wall；Driving lever and handle be installed in the control end of the valve rod, handle is rotated, the driving lever can suppress or
Unclamp the seesaw on microswitch；
Inlet connector and flowline connection to subsea are provided with the valve body corresponding with the first valve ball installation site, is pacified with the second valve ball
Air inlet pipe joint and outlet pipe joint are provided with the corresponding valve body of holding position；
The valve seat is separately mounted on the inner end of inlet connector, flowline connection to subsea, air inlet pipe joint and outlet pipe joint,
And be engaged respectively with the first valve ball and the second valve ball；The open/close states of first valve ball and the second valve ball are opposite；
The microswitch is arranged in the outside wall surface of valve body.
2. oil gas moment switching device according to claim 1, it is characterised in that：On first valve ball and the second valve ball
Through-bore axis be mutually perpendicular to.
3. oil gas moment switching device according to claim 1, it is characterised in that：It is provided with the control end of the valve rod
Driving lever mounting hole, the driving lever is vertically mounted in the control end of valve rod.
4. a kind of working method of oil gas moment switching device as any one of claim 1-3, it is characterised in that：First
The flowline connection to subsea and outlet pipe joint of oil gas moment switching device are respectively connecting to carburetor, and oil gas moment is switched into dress
The inlet connector and air inlet pipe joint put connect oil sources and source of the gas respectively；The microswitch also with the magnetic valve on carburetor
It is connected, the keying for controlling magnetic valve, the magnetic valve is normally closed solenoid valve；
（1）Handle is rotated, when the second valve ball is opened, the first valve ball is closed, and inlet channel is unimpeded, and oil inlet passage is then closed；
Simultaneously, driving lever unclamps the closed electromagnetic valve on the seesaw of microswitch, microswitch power-off, carburetor；Now, carburetor
The combustion gas of fuel is provided for engine；
（2）Handle is rotated, when the first valve ball is opened, the second valve ball is closed, and oil inlet passage is unimpeded, and inlet channel is then closed；In
This simultaneously, driving lever suppresses the seesaw of microswitch, and microswitch is powered, and the magnetic valve on carburetor is opened；Now, carburetor is
It is fuel oil that engine, which provides fuel,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510286703.XA CN104864124B (en) | 2015-05-30 | 2015-05-30 | Oil gas moment switching device and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510286703.XA CN104864124B (en) | 2015-05-30 | 2015-05-30 | Oil gas moment switching device and its working method |
Publications (2)
| Publication Number | Publication Date |
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| CN104864124A CN104864124A (en) | 2015-08-26 |
| CN104864124B true CN104864124B (en) | 2017-07-28 |
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ID=53910166
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510286703.XA Expired - Fee Related CN104864124B (en) | 2015-05-30 | 2015-05-30 | Oil gas moment switching device and its working method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508660B (en) * | 2015-12-24 | 2017-10-03 | 重庆安来动力机械有限公司 | Oil-gas two-way is switched |
| CN106285968B (en) * | 2016-08-30 | 2019-03-15 | 重庆凯龙科技有限公司 | Check valve-type oil gas conversion switch |
| CN106439111B (en) * | 2016-11-29 | 2018-07-10 | 冯彦 | A kind of water mixing valve and water mixing valve group |
| CN109199576A (en) * | 2018-10-29 | 2019-01-15 | 郑州大学第附属医院 | Hysteroscope lower monopole operates instrument |
| CN111964067B (en) * | 2020-08-20 | 2022-11-29 | 广西中烟工业有限责任公司 | Oil-gas dual-purpose boiler fuel automatic switching control system |
| CN115875341B (en) * | 2022-12-26 | 2024-06-07 | 常州市科普特佳顺机床附件有限公司 | Middle-solid rotary oil cylinder controlled by booster cylinder |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR19470E (en) * | 1915-02-11 | Jean Francois Rolland | Safety valve for the distribution of flammable liquids at various points located on a single pipe | |
| US3595270A (en) * | 1970-01-20 | 1971-07-27 | Andale Co | Plug valve construction and operating mechanism |
| CN201588978U (en) * | 2009-12-01 | 2010-09-22 | 陈孝生 | Linkage three-way spherical valve set |
| CN201858391U (en) * | 2010-11-23 | 2011-06-08 | 黄碎雅 | Internal threaded ball valve |
| CN202046210U (en) * | 2011-04-18 | 2011-11-23 | 衡阳合力工业车辆有限公司 | Flameproof direction switch |
| CN102426941B (en) * | 2011-09-14 | 2014-04-02 | 山东一统电器有限公司 | Electric and mechanical two-in-one operation mechanism for brake separation |
| CN204647435U (en) * | 2015-05-30 | 2015-09-16 | 夏品清 | Oil gas moment COMM communication |
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2015
- 2015-05-30 CN CN201510286703.XA patent/CN104864124B/en not_active Expired - Fee Related
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| CN104864124A (en) | 2015-08-26 |
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Granted publication date: 20170728 |