CN109268154B - Dual-fuel switching device - Google Patents
Dual-fuel switching device Download PDFInfo
- Publication number
- CN109268154B CN109268154B CN201811420376.2A CN201811420376A CN109268154B CN 109268154 B CN109268154 B CN 109268154B CN 201811420376 A CN201811420376 A CN 201811420376A CN 109268154 B CN109268154 B CN 109268154B
- Authority
- CN
- China
- Prior art keywords
- hand wheel
- rotating shaft
- pull block
- groove
- fuel switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The dual-fuel switching device is characterized by comprising a hand wheel and a mounting shell, wherein a rotating shaft is arranged in the center of the hand wheel, and a spiral groove is formed in the side wall of the rotating shaft; the outer end of the rotating shaft is provided with a bayonet; the outer end of the mounting shell is provided with a shaft hole matched with the rotating shaft, and the inner end of the mounting shell is provided with an opening; a pull block is arranged in the mounting shell in a sliding manner and is arranged on the rotating shaft in a sliding manner; the rotating shaft passes through the pull block and extends out of the installation shell; the outer wall of the installation shell is provided with a strip-shaped groove, the side wall of the pull block is provided with a screw hole and a pull block screw, and the screw penetrates through the strip-shaped groove and the pin hole and stretches into the spiral groove. The beneficial technical effects of the invention are as follows: 1. the dual-fuel switching can be realized by twisting the hand wheel, so that the operation is simple and the use is convenient. 2. The hand wheel positioning groove is arranged, so that a user can control the complete opening or closing of one fuel. 3. Simple structure and low production cost. 4. The structure is compact, and the space is not occupied. 5. The appearance is simple and beautiful.
Description
Technical Field
The invention relates to the technical field of engine switches, in particular to a dual-fuel switching device.
Background
The dual-fuel engine is a dual-fuel engine capable of using gasoline and gas, has the technical characteristics of high efficiency and low pollution emission, and has good development prospect.
In the use process of the dual-fuel engine, the operation of oil-gas switching is needed when the type of the required fuel is changed, in the prior art, the invention patent with the application number of CN2015100956429 discloses a dual-fuel switch, which comprises a valve body and a valve rod, wherein an oil inlet hole, an oil outlet hole, an air inlet hole and an air outlet hole are respectively formed in the side wall of the valve body, two switching plates are fixedly connected to the valve rod, and connecting grooves are formed in the opposite side surfaces of the two switching plates. Under the control of the valve rod, when the engagement groove on one switching plate is respectively communicated with the inner end orifice of the oil inlet hole and the inner end orifice of the oil outlet hole, the engagement groove on the other switching plate is disconnected with the inner end orifice of the air inlet hole or the inner end orifice of the air outlet hole; when the connecting groove on one switching plate is respectively communicated with the inner end hole opening of the air inlet hole and the inner end hole opening of the air outlet hole, the connecting groove on the other switching plate is disconnected with the inner end hole opening of the oil inlet hole or the inner end hole opening of the oil outlet hole. Because two linking grooves are respectively arranged on the two switching plates, one linking groove is always used for connecting fuel oil, and the other linking groove is always used for connecting gasoline, so that only one linking groove can be in a communicating state at the same time point, the simultaneous communication of a fuel oil pipeline and a gasoline pipeline is avoided, and the switching of dual fuels is realized.
However, the above-mentioned change-over switch includes parts such as inlet port, oil outlet hole, inlet port, venthole, valve rod, switching plate, linking groove, etc. the connection line of inlet port inner orifice and oil outlet port inner orifice still needs perpendicular to connect with inlet port inner orifice and venthole inner orifice, and the structure is comparatively complicated.
In the process of switching oil and gas pipelines, linked parts are more; the valve rod is required to be operated to enable the connecting groove on one switching plate to be communicated with the oil inlet and the oil outlet, and meanwhile, the connecting groove on the other switching plate is disconnected with the oil inlet and the oil outlet; when the parts in the switch are damaged, the whole valve body needs to be opened, and at the moment, the oil and gas pipelines are in an open state and need to be independently closed; the maintenance process is very inconvenient.
Disclosure of Invention
The invention aims to provide a dual-fuel switching device which is designed separately from a fuel switch, has a simple structure and is convenient to use.
In order to achieve the above purpose, the following technical scheme is provided:
a dual-fuel switching device comprises a hand wheel and a mounting shell, wherein a rotating shaft is arranged at the center of the hand wheel, and a spiral groove is arranged on the side wall of the rotating shaft; the outer end of the rotating shaft is provided with a bayonet; the outer end of the mounting shell is provided with a shaft hole matched with the rotating shaft, and the inner end of the mounting shell is provided with an opening; a pull block is arranged in the mounting shell in a sliding manner and is arranged on the rotating shaft in a sliding manner; the rotating shaft passes through the pull block and extends out of the installation shell; the outer wall of the installation shell is provided with a strip-shaped groove, the side wall of the pull block is provided with a screw hole and a pull block screw, and the screw penetrates through the strip-shaped groove and the pin hole and stretches into the spiral groove.
Further, a limit groove is formed in the side wall of the outer end of the rotating shaft, a mounting lug matched with the limit groove is arranged on the mounting shell, and a screw penetrates through the mounting lug and stretches into the limit groove.
Further, the hand wheel is hollow columnar, the inner wall circumference is provided with a bearing platform, the outer side of the inner end of the installation shell is provided with a ring seat, and the hand wheel is buckled on the ring seat through the bearing platform.
Further, a cylinder is arranged on one side of the ring seat, which is close to the hand wheel, a spring and a positioning round head pin are arranged in the cylinder, and a hand wheel positioning groove matched with the positioning round head pin is arranged in the switching hand wheel.
Further, an arc-shaped supporting bar and a limiting bar connected with two sides of the arc-shaped supporting bar are arranged in the hand wheel positioning groove, the joint of the arc-shaped supporting bar and the limiting bar is smoothly connected, and the outer side of the limiting bar is provided with a round corner.
Further, the outer end of the installation shell is provided with a fuel switch installation seat and an oil switch inhaul cable installation seat.
Further, anti-slip stripes are circumferentially arranged on the outer side of the hand wheel.
The application principle of the invention is as follows:
the rotating shaft of the hand wheel is provided with a spiral groove, a pull block screw penetrates through the strip-shaped groove on the installation shell to be fixed on the pull block, and penetrates through the pull block to extend into the spiral groove, so that the pull block and the rotating shaft are limited and arranged in the installation shell; the oil switch inhaul cable is arranged on the pull block through a fixing screw; the end part of the rotating shaft is provided with a bayonet; the rotating shaft is coaxial with the ball valve in the gas switch, and the bayonet of the rotating shaft is inserted into the clamping head of the gas switch.
When the oil fuel pipeline is used, the pull block screw slides along the spiral groove, and the strip groove is used for limiting the pull block to rotate in the installation shell, so that the pull block is driven to move back and forth in the installation shell to close or pull the oil switch inhaul cable, and the oil fuel pipeline is opened or closed; meanwhile, the rotating shaft can drive the clamping head of the gas switch to rotate, so that a ball valve in the gas switch is driven to be opened or closed; realizing the closing or opening of the gas fuel.
By completing the action of twisting the hand wheel, one fuel supply is closed and the other fuel supply is opened at the same time, so that the purpose of switching use is achieved.
The beneficial technical effects of the invention are as follows:
1. the fuel gas switch and the oil switch are arranged in a split way with the switching device, and are not affected when being maintained or replaced.
2. The dual-fuel switching can be realized by twisting the hand wheel, so that the operation is simple and the use is convenient.
3. The hand wheel positioning groove is arranged, so that a user can control the complete opening or closing of one fuel, and the switching is reliable.
4. Simple structure and low production cost.
5. The structure is compact, and the internal space of the engine is not occupied.
6. The appearance is simple and beautiful.
Drawings
Fig. 1 is a schematic exploded view of the dual fuel switching device of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the dual fuel switching device in the use state of the invention.
Fig. 3 is a schematic structural diagram of the dual fuel switching device in the use state of the invention.
Fig. 4 is a schematic structural diagram of a hand wheel and a rotating shaft in the dual-fuel switching device of the invention.
Fig. 5 is a schematic diagram of a hand wheel positioning groove on the hand wheel.
In the figure: the hand wheel 1, the mounting shell 2, the rotating shaft 3, the spiral groove 4, the bayonet 5, the shaft hole 6, the pull block 7, the strip-shaped groove 8, the screw hole 9, the pull block screw 10, the limit groove 11, the mounting lug 12, the limit screw 13, the bearing platform 14, the ring seat 15, the cylinder 16, the spring 17, the positioning round head pin 18, the hand wheel positioning groove 19, the arc-shaped supporting bar 20, the limit bar 21, the gas switch mounting seat 22, the oil switch cable mounting seat 23, the anti-slip bar 24, the gas switch 26 and the oil switch cable 26.
Detailed Description
A dual fuel switching device of the present invention is further described below with reference to the drawings and specific embodiments.
As shown in fig. 1, 2, 3, 4 and 5, a dual-fuel switching device comprises a hand wheel 1 and a mounting shell 2, wherein a rotating shaft 3 is arranged at the center of the hand wheel 1, and a spiral groove 4 is arranged on the rotating shaft 3; the outer end of the rotating shaft 3 is provided with a bayonet 5; the outer end of the installation shell 2 is provided with a shaft hole 6 matched with the rotating shaft 3, and the inner end is an opening; a pull block 7 is arranged in the mounting shell 2 in a sliding manner, and the pull block 7 is arranged on the rotating shaft 3 in a sliding manner; the rotating shaft 3 passes through the pull block 7 and extends out of the installation shell 2; the outer wall of the installation shell 2 is provided with a strip-shaped groove 8, the side wall of the pull block 7 is provided with a screw hole 9 and a pull block 7 screw, and the screw penetrates through the strip-shaped groove 8 and the pin hole to extend into the spiral groove 4.
The rotating shaft 3 of the hand wheel 1 is provided with a spiral groove 4, a pull block 7 screw penetrates through a strip-shaped groove 8 on the installation shell 2 to be fixed on the pull block 7, and penetrates through the pull block 7 to extend into the spiral groove 4, so that the pull block 7 and the rotating shaft 3 are limited and arranged in the installation shell 2; the oil switch inhaul cable 26 is arranged on the pull block 7 through a fixing screw; the end part of the rotating shaft 3 is provided with a bayonet 5; the rotating shaft 3 is coaxial with the ball valve in the gas switch 25, and the bayonet 5 of the rotating shaft 3 is inserted into the chuck of the gas switch 25.
When the oil fuel pipeline oil pump is used, the pull block 7 screw slides along the spiral groove 4, and the strip-shaped groove 8 is used for limiting the pull block 7 to rotate in the installation shell 2, so that the pull block 7 is driven to move forwards and backwards in the installation shell 2 to close or pull the oil switch inhaul cable 26, and the oil fuel pipeline is opened or closed; meanwhile, the rotating shaft 3 can drive the clamping head of the gas switch 25 to rotate, so that a ball valve in the gas switch 25 is driven to be opened or closed; realizing the closing or opening of the gas fuel.
By completing the action of twisting the hand wheel 1, one fuel supply is closed and the other fuel supply is opened at the same time, so that the purpose of switching use is achieved.
In this embodiment, when the hand wheel 1 rotates anticlockwise, the pull block 7 slides forwards in the installation shell 2, the oil switch cable 26 drives the oil switch to be closed, and at the same time, the hand wheel 1 drives the gas switch 25 to be opened through the rotating shaft 3, so that the closing of the oil circuit pipeline and the opening of the gas pipeline are realized. When the hand wheel 1 rotates clockwise, the pull block 7 slides backwards in the installation shell 2, the oil switch inhaul cable 26 drives the oil switch to be opened, and meanwhile, the hand wheel 1 drives the gas switch 25 to be closed through the rotating shaft 3, so that the opening of the oil way pipeline and the closing of the gas pipeline are realized. Thus, the hand wheel 1 is rotated in different directions to realize the fuel switching, and the fuel switching is simple and quick.
Further, a limit groove 11 is formed in the side wall of the outer end of the rotating shaft 3, a mounting lug 12 matched with the limit groove 11 is arranged on the mounting shell 2, and a limit screw 13 penetrates through the mounting lug 12 and stretches into the limit groove 11, so that the rotating shaft 3 can only rotate in the mounting shell 2 and cannot move back and forth, and the control of the pulling block 7 to move back and forth in the mounting shell 2 instead of the front and back movement of the rotating shaft 3 is facilitated. And the circumferential opening length of the limiting groove 11 can be matched with the length of the path of the hand wheel 1 for completing one-time fuel switching rotation, so that the action of movably limiting the hand wheel 1 is achieved.
Further, the hand wheel 1 is hollow columnar, the bearing platform 14 is circumferentially arranged on the inner wall, the ring seat 15 is arranged on the outer side of the inner end of the installation shell 2, the hand wheel 1 is buckled on the ring seat 15 through the bearing platform 14, in the specific embodiment, the hand wheel 1 can rotate around the ring seat 15, and the installation stability of the hand wheel 1 is improved.
Further, in this embodiment, a cylinder 16 is disposed on one side of the ring seat 15 near the hand wheel 1, a spring 17 and a positioning round pin 18 are disposed in the cylinder 16, and a hand wheel positioning groove 19 matched with the positioning round pin 18 is disposed in the switching hand wheel 1; the hand wheel positioning groove 19 is matched with the hand wheel 1 in a fuel switching rotating path, when the hand wheel 1 is rotated to switch fuel, the hand wheel positioning groove 19 is clamped by the positioning round pin 18, so that the hand wheel 1 can be prevented from being excessively rotated, a user can be helped to check whether the oil switch or the gas switch 25 is completely opened or closed, and the spring 17 is favorable for positioning the round pin 18 to stretch out and draw back in the cylinder 16, so that the purpose of movable setting is achieved.
Further, in this embodiment, the hand wheel positioning groove 19 is provided with an arc-shaped supporting bar 20 and a limiting bar 21 connected to two sides of the arc-shaped supporting bar 20, the connection between the arc-shaped supporting bar 20 and the limiting bar 21 is smooth, and the outer side of the limiting bar 21 is provided with a round corner. When the hand wheel 1 is rotated, the positioning round-head pin 18 slides on the arc-shaped supporting bar 20 in the hand wheel positioning groove 19, the positioning round-head pin 18 stretches under the action of the spring 17 in the cylinder 16, when the positioning round-head pin 18 slides to the edge of the hand wheel positioning groove 19 and falls between the limiting bar 21 and the hand wheel 1 positioning groove, at the moment, one fuel switch is completely opened, and the other fuel switch is closed; the arc-shaped supporting bar 20 is smoothly connected with the connecting part of the limiting bar 21, and the outer side of the limiting bar 21 is provided with a round corner, so that the positioning round pin 18 can slide in the hand wheel positioning groove 19, and the positioning round pin 18 can slide in or slide out from the limiting bar 21.
Further, in this embodiment, the outer end of the installation shell 2 is provided with a gas switch installation seat 22 and an oil switch cable installation seat 23, so that the gas switch 25 and the oil switch cable 26 can be installed on the installation shell 2, the relevance between the switching device and the fuel switch is increased, and the structure is compact; and the gas switch 25 and the oil switch are separately arranged with the switching device, and are not affected when being maintained or replaced.
Further, the outer circumference of the hand wheel 1 is provided with anti-slip stripes 24. The hand wheel 1 is twisted by a user conveniently, so that the hand is prevented from sliding.
Claims (10)
1. The dual-fuel switching device is characterized by comprising a hand wheel (1) and a mounting shell (2), wherein a rotating shaft (3) is arranged at the center of the hand wheel (1), and a spiral groove (4) is formed in the side wall of the rotating shaft (3); the outer end of the rotating shaft (3) is provided with a bayonet (5); the outer end of the mounting shell (2) is provided with a shaft hole (6) matched with the rotating shaft (3), and the inner end is an opening; a pull block (7) is arranged in the mounting shell (2) in a sliding manner, and the pull block (7) is arranged on the rotating shaft (3) in a sliding manner; the rotating shaft (3) passes through the pull block (7) and extends out of the mounting shell (2); the outer wall of the installation shell (2) is provided with a strip-shaped groove (8), the side wall of the pull block (7) is provided with a screw hole (9) and a pull block screw (10), the pull block screw (10) penetrates through the strip-shaped groove (8) and the pin hole to extend into the spiral groove (4), and the oil switch inhaul cable (26) is installed on the pull block (7) through the fixing screw; the rotating shaft (3) is coaxial with the ball valve in the gas switch (25), and the bayonet (5) of the rotating shaft (3) is inserted into the chuck of the gas switch (25).
2. A dual fuel switching device as claimed in claim 1, characterised in that the side wall of the outer end of the spindle (3) is provided with a limit groove (11), the mounting housing (2) is provided with a mounting lug (12) cooperating with the limit groove (11), the mounting lug (12) is provided with a limit screw (13), and the limit screw (13) extends into the limit groove (11) through the mounting lug (12).
3. A dual fuel switching device as claimed in claim 1 or 2, characterised in that the hand wheel (1) is hollow and cylindrical, the inner wall is circumferentially provided with a bearing platform (14), the outer side of the inner end of the mounting shell (2) is provided with a ring seat (15), and the hand wheel (1) is clamped on the ring seat (15) by the bearing platform (14).
4. A dual fuel switching device as claimed in claim 3, characterised in that the side of the ring seat (15) adjacent the hand wheel (1) is provided with a cylinder (16), the cylinder (16) is provided with a spring (17) and a locating knob pin (18), and the hand wheel (1) is provided with a hand wheel locating groove (19) which cooperates with the locating knob pin (18).
5. The dual fuel switching device according to claim 4, wherein an arc-shaped supporting bar (20) and a limiting bar (21) connected with two ends of the arc-shaped supporting bar (20) are arranged in the hand wheel positioning groove (19), the arc-shaped supporting bar (20) is smoothly connected with the limiting bar (21), and a round corner is arranged on the outer side of the limiting bar (21).
6. A dual fuel switching arrangement as claimed in claim 1, 2, 4 or 5 characterised in that the outer end of the mounting housing (2) is provided with a gas switch mount (22) and an oil switch cable mount (23).
7. A dual fuel switching arrangement as claimed in claim 3 characterised in that the outer end of the mounting housing (2) is provided with a gas switch mount (22) and an oil switch cable mount (23).
8. A dual fuel switching device as claimed in claim 1, 2, 4, 5 or 7, characterised in that the outer wall periphery of the hand wheel (1) is provided with anti-slip strips (24).
9. A dual fuel switching device as claimed in claim 3 characterised in that the outer wall of the hand wheel (1) is circumferentially provided with anti-slip strips (24).
10. A dual fuel switching device as claimed in claim 6, characterised in that the outer wall of the hand wheel (1) is circumferentially provided with anti-slip strips (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420376.2A CN109268154B (en) | 2018-11-26 | 2018-11-26 | Dual-fuel switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420376.2A CN109268154B (en) | 2018-11-26 | 2018-11-26 | Dual-fuel switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109268154A CN109268154A (en) | 2019-01-25 |
| CN109268154B true CN109268154B (en) | 2023-07-18 |
Family
ID=65191535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811420376.2A Active CN109268154B (en) | 2018-11-26 | 2018-11-26 | Dual-fuel switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109268154B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864069A (en) * | 2021-11-09 | 2021-12-31 | 重庆宗申通用动力机械有限公司 | Multi-fuel switching device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131124A (en) * | 1982-11-22 | 1984-06-13 | Orford John Reginald | Valves |
| US4917354A (en) * | 1989-01-10 | 1990-04-17 | Chambers James F | Dual action ball valve |
| CN2630589Y (en) * | 2003-05-23 | 2004-08-04 | 厦门三高维多利阀门有限公司 | Ball valve with long service life |
| CN101666340A (en) * | 2008-09-03 | 2010-03-10 | 上海立新液压有限公司 | Reversing valve operated by handwheel |
| CN104653307A (en) * | 2015-03-04 | 2015-05-27 | 钱江集团浙江亿江机电有限公司 | Dual-fuel transfer switch |
| CN104930222A (en) * | 2015-06-12 | 2015-09-23 | 张元晖 | Oil-gas linkage switching device and working mode thereof |
| CN209369940U (en) * | 2018-11-26 | 2019-09-10 | 重庆大江动力设备制造有限公司 | A kind of double fuel switching device |
-
2018
- 2018-11-26 CN CN201811420376.2A patent/CN109268154B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131124A (en) * | 1982-11-22 | 1984-06-13 | Orford John Reginald | Valves |
| US4917354A (en) * | 1989-01-10 | 1990-04-17 | Chambers James F | Dual action ball valve |
| US4917354B1 (en) * | 1989-01-10 | 1993-01-26 | Grove Valve & Regulator Co | |
| CN2630589Y (en) * | 2003-05-23 | 2004-08-04 | 厦门三高维多利阀门有限公司 | Ball valve with long service life |
| CN101666340A (en) * | 2008-09-03 | 2010-03-10 | 上海立新液压有限公司 | Reversing valve operated by handwheel |
| CN104653307A (en) * | 2015-03-04 | 2015-05-27 | 钱江集团浙江亿江机电有限公司 | Dual-fuel transfer switch |
| CN104930222A (en) * | 2015-06-12 | 2015-09-23 | 张元晖 | Oil-gas linkage switching device and working mode thereof |
| CN209369940U (en) * | 2018-11-26 | 2019-09-10 | 重庆大江动力设备制造有限公司 | A kind of double fuel switching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109268154A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107654840B (en) | Indexing type hydrogen fuel cell automobile hydrogenation gun | |
| CN103521369B (en) | Top spray and the shower system of Portable rose combination | |
| US20160310972A1 (en) | Pressing waterway switch device and shower head | |
| CN109268154B (en) | Dual-fuel switching device | |
| CN104454058B (en) | Ventilsteuerzeitsteuervorrichtung | |
| US11377828B2 (en) | Socket device | |
| CN104373412B (en) | A kind of double-click cylinder | |
| CN112066025B (en) | Hydraulic valve with lubricating function | |
| CN216539015U (en) | Water outlet device | |
| CN206503997U (en) | Fuel gas ball valve | |
| CN205797529U (en) | A kind of gondola water faucet facilitating switching water discharging state | |
| CN202300714U (en) | Gas mixer capable of being adapted to change of coalbed gas concentration to control air-gas ratio | |
| CN206503957U (en) | From power-assisted fuel gas ball valve | |
| CN209369940U (en) | A kind of double fuel switching device | |
| CN216642418U (en) | Air sac pump for conveying acid and alkali liquor | |
| CN211500810U (en) | Dual-fuel integrated switch | |
| US2261471A (en) | Adjustable volume control pump and two-stage pump | |
| CN213751721U (en) | Connecting mechanism is assembled fast to LED display screen | |
| CN209115210U (en) | A kind of double fuel switching handwheel | |
| CN204175701U (en) | A kind of double-click cylinder | |
| CN112096897A (en) | Plug valve | |
| CN211649156U (en) | Three-fuel integrated switch | |
| CN215907904U (en) | Switching device of underground local ventilator of coal mine | |
| US20140261311A1 (en) | Fuel mixer | |
| CN221585388U (en) | Pneumatic control valve for vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |