CN203175727U - Fuel pump with safety valve - Google Patents
Fuel pump with safety valve Download PDFInfo
- Publication number
- CN203175727U CN203175727U CN 201320208319 CN201320208319U CN203175727U CN 203175727 U CN203175727 U CN 203175727U CN 201320208319 CN201320208319 CN 201320208319 CN 201320208319 U CN201320208319 U CN 201320208319U CN 203175727 U CN203175727 U CN 203175727U
- Authority
- CN
- China
- Prior art keywords
- fuel pump
- pump body
- fuel
- negative pressure
- spring
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a fuel pump with a safety valve. The fuel pump with the safety valve comprises a fuel pump body (1), an upper cover (2) and a lower cover (3). A negative-pressure spring (10), a spring push block (9) and a negative-pressure diaphragm (8) are sequentially arranged between the upper cover (2) and the fuel pump body (1), a fuel outlet diaphragm (7) is arranged between the lower cover (3) and the fuel pump body (1), the inside of the fuel pump body (1) is provided with a fuel inlet chamber (16), a negative pressure control chamber (17) and a fuel outlet chamber (18), the outlet of the fuel inlet chamber (16) and the inlet of the fuel outlet chamber (18) are respectively provided with a one-way valve block (6) and a limit piece (5), the fuel pump body (1) is also provided with a fuel inlet pipe (13), and the joint between the fuel inlet pipe (13) and the fuel pump body (1) is provided with a fuel inlet spring (11) and a ball valve (12). The fuel pump with the safety valve has the advantage of being stable in operation, good in environmental adaptability and long in service life.
Description
Technical field
The utility model relates to universal machine motor oil-feed system unit, particularly a kind of fuel pump that has safety valve.
Background technique
For the oil-burning machine product, fuel tank intermediate fuel oil supply engine under the gravity effect normally, but during a lot of engine design, for various reasons, the position of fuel tank is very low, thus pressure is not enough when causing fuel delivery, can't satisfy motor acting requirement.Thereby design fuel pump, it is on the low side that fuel pump is widely used in the fuel tank position, and fuel feeding pressure can't satisfy in the engine design of engine demand.Oil well oil outlet tube in the fuel supply chamber of fuel pump enters in the motor, understanding some pressure oil after the motor oil-feed is saturated is got back in the fuel supply chamber of fuel pump by reflow pipe, in this process, because the oil pressure in the fuel supply chamber of return tube and motor and fuel pump is inconsistent, fuel pump does not in the market all have the safety design, when motor is reduced to low speed by high speed, throttle moment closes, can produce the high pressure return pressure of moment this moment, diaphragm and parts damages with fuel pump, thereby cause motor the fuel feeding instability to occur, even leakage of oil, serious potential safety hazards such as fire take place.
The model utility content
The purpose of this utility model is to overcome the shortcoming of prior art, the fuel pump that has safety valve of the strong and long service life of a kind of working stability, accommodative ability of environment is provided, to solve when motor is reduced to low speed by high speed, throttle moment closes, produce the high pressure return pressure of moment, damage diaphragm and the parts of fuel pump, thereby cause motor the fuel feeding instability to occur, even problem such as leakage of oil.
The purpose of this utility model is achieved through the following technical solutions: a kind of fuel pump that has safety valve, it comprises the fuel pump body, loam cake and lower cover, loam cake and lower cover are by being bolted to the both sides of fuel pump body, be provided with the negative pressure spring successively between described loam cake and the fuel pump body, spring jacking block and negative pressure diaphragm, negative pressure spring and spring jacking block are connected, the front-end face of spring jacking block is pressed on the negative pressure diaphragm, be provided with fuel-displaced diaphragm between lower cover and the fuel pump body, offer inlet space in the fuel pump body, negative pressure control room and go out the grease chamber, inlet space is communicated with the negative pressure control room, the negative pressure control room with go out the grease chamber and be communicated with, the outlet port of inlet space is separately installed with check valve sheet and banking stop with the ingress that goes out the grease chamber, check valve sheet and banking stop are fixed on the fuel pump body by valve shaft, also be provided with oil inlet pipe on the fuel pump body, the intersection of oil inlet pipe and fuel pump body is provided with oil-feed spring and ball valve, one end of oil-feed spring is fixed on the inwall of oil inlet pipe, and the other end of oil-feed spring cooperates with ball valve.
The end of described oil inlet pipe is provided with dust cap.
The arranged outside of described loam cake has filter core.
Four angles of described fuel pump body are provided with four bolts hole that vertically run through the fuel pump body.
The utlity model has following advantage:
1, adopt the special (purpose) rubber prescription, the low and good stability of diaphragm cost, and high-low temperature resistant, strong to the adaptability of environment, for the stable operation of fuel pump provides great convenience.
2, be provided with escape way in the fuel pump body of the present invention, in inlet space with go out to be provided with the negative pressure control room between the grease chamber, the negative pressure control room is set to buffer area, when preventing that effectively motor from dropping to low speed by high speed suddenly, after the Carburetor fuel feeding reduces rapidly, fuel pressure in the fuel feeding path is with the bad phenomenon of fuel pump diaphragm pressure break, the working life of further improving fuel pump.
3, the fuel pump body adopts 4 fixing modes, and loam cake and lower cover are fixed on the fuel pump body, has guaranteed steadiness and sealing between fuel pump body and the upper and lower covers.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that Fig. 1 is along B-B sectional structure schematic representation;
Fig. 3 opens structural representation behind the loam cake for Fig. 1;
Among the figure: 1-fuel pump body, 2-loam cake, 3-lower cover, 4-valve shaft, the 5-banking stop, 6-check valve sheet, the fuel-displaced diaphragm of 7-, 8-negative pressure diaphragm, 9-spring jacking block, 10-negative pressure spring, 11-oil-feed spring, 12-ball valve, 13-oil inlet pipe, the 14-dust cap, 15-filter core, 16-inlet space, 17-negative pressure control room, 18-goes out the grease chamber, the 19-bolt hole.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but protection domain of the present utility model is not limited to the following stated.
As Fig. 1, Fig. 2 and shown in Figure 3, a kind of fuel pump that has safety valve, it comprises fuel pump body 1, loam cake 2 and lower cover 3, four angles of fuel pump body 1 are provided with four bolts hole 19 that vertically run through fuel pump body 1, loam cake 2 and lower cover 3 are by being bolted to the both sides of fuel pump body 1, the arranged outside of loam cake 2 has filter core 15, be provided with negative pressure spring 10 successively between described loam cake 2 and the fuel pump body 1, spring jacking block 9 and negative pressure diaphragm 8, negative pressure spring 10 is connected with spring jacking block 9, the front-end face of spring jacking block 9 is pressed on the negative pressure diaphragm 8, be provided with fuel-displaced diaphragm 7 between lower cover 3 and the fuel pump body 1, offer inlet space 16 in the fuel pump body 1, negative pressure control room 17 and go out grease chamber 18, inlet space 16 is communicated with negative pressure control room 17, negative pressure control room 17 with go out grease chamber 18 and be communicated with, the outlet port of inlet space 16 is separately installed with check valve sheet 6 and banking stop 5 with the ingress that goes out grease chamber 18, check valve sheet 6 and banking stop 5 are fixed on the fuel pump body 1 by valve shaft 4, also be provided with oil inlet pipe 13 on the fuel pump body 1, oil inlet pipe 13 is provided with oil-feed spring 11 and ball valve 12 with the intersection of fuel pump body 1, one end of oil-feed spring 11 is fixed on the inwall of oil inlet pipe 13, and the other end of oil-feed spring 11 cooperates with ball valve 12.
As shown in Figure 1, the end of oil inlet pipe 13 is provided with dust cap 14.
As shown in Figure 3, oil inlet pipe 13 back are equipped with oil-feed spring 11 and ball valve 12, are in closed condition under ball valve 12 normal states, with inlet space 16 with go out path blockade between the grease chamber 18, form simple and easy, a safe Decompression valves.
As shown in Figure 2, the inlet space 16 of fuel pump body 1 and go out check valve sheet 6 and banking stop 5 are housed respectively in the grease chamber 18, check valve sheet 6 and banking stop 5 are fixed on the fuel pump body 1 by valve shaft 4, between fuel pump body 1 and the loam cake 2 negative pressure spring 10 is housed, spring jacking block 9 and negative pressure diaphragm 8, the negative pressure pipe is arranged on the loam cake 2, be connected to motor, negative pressure by motor acting generation, drive 8 motions of negative pressure diaphragm, with fuel oil sucking-off from inlet space 16, fuel oil flows into 17 inside, negative pressure control room by check valve sheet 6 by inlet space 16, flow into out in the grease chamber 18 by another check valve sheet 6 again.
Claims (4)
1. fuel pump that has safety valve, it comprises fuel pump body (1), loam cake (2) and lower cover (3), loam cake (2) and lower cover (3) are by being bolted to the both sides of fuel pump body (1), it is characterized in that: be provided with negative pressure spring (10) successively between described loam cake (2) and the fuel pump body (1), spring jacking block (9) and negative pressure diaphragm (8), negative pressure spring (10) is connected with spring jacking block (9), the front-end face of spring jacking block (9) is pressed on the negative pressure diaphragm (8), be provided with fuel-displaced diaphragm (7) between lower cover (3) and the fuel pump body (1), offer inlet space (16) in the fuel pump body (1), negative pressure control room (17) and go out grease chamber (18), inlet space (16) is communicated with negative pressure control room (17), negative pressure control room (17) with go out grease chamber (18) and be communicated with, the outlet port of inlet space (16) is separately installed with check valve sheet (6) and banking stop (5) with the ingress that goes out grease chamber (18), check valve sheet (6) and banking stop (5) are fixed on the fuel pump body (1) by valve shaft (4), also be provided with oil inlet pipe (13) on the fuel pump body (1), oil inlet pipe (13) is provided with oil-feed spring (11) and ball valve (12) with the intersection of fuel pump body (1), one end of oil-feed spring (11) is fixed on the inwall of oil inlet pipe (13), and the other end of oil-feed spring (11) cooperates with ball valve (12).
2. a kind of fuel pump that has safety valve according to claim 1, it is characterized in that: the end of described oil inlet pipe (13) is provided with dust cap (14).
3. a kind of fuel pump that has safety valve according to claim 1, it is characterized in that: the arranged outside of described loam cake (2) has filter core (15).
4. a kind of fuel pump that has safety valve according to claim 1, it is characterized in that: four angles of described fuel pump body (1) are provided with four bolts hole (19) that vertically run through fuel pump body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208319 CN203175727U (en) | 2013-04-23 | 2013-04-23 | Fuel pump with safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208319 CN203175727U (en) | 2013-04-23 | 2013-04-23 | Fuel pump with safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203175727U true CN203175727U (en) | 2013-09-04 |
Family
ID=49072435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320208319 Expired - Fee Related CN203175727U (en) | 2013-04-23 | 2013-04-23 | Fuel pump with safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203175727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206325A (en) * | 2013-04-23 | 2013-07-17 | 成都恒高机械电子有限公司 | Fuel pump with safety valve |
-
2013
- 2013-04-23 CN CN 201320208319 patent/CN203175727U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206325A (en) * | 2013-04-23 | 2013-07-17 | 成都恒高机械电子有限公司 | Fuel pump with safety valve |
| CN103206325B (en) * | 2013-04-23 | 2015-11-11 | 成都恒高机械电子有限公司 | A kind of fuel pump with safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20150423 |
|
| EXPY | Termination of patent right or utility model |