CN107882668B - Fuel filter seat - Google Patents

Abstract

The invention belongs to the technical field of engines and discloses a fuel filter seat. The fuel filter seat includes a base body and a manual oil pump located on the base body. The manual oil pump includes a handle, a gland and a diaphragm. The handle is located outside the manual oil pump; the gland includes a cover head and a cover plate connected to the cover head. The cover is fixed on the base; the diaphragm is connected to the handle and is located inside the cover; when the handle is in the first position relative to the cap, the handle can slide up and down relative to the cap; when it is in the second position, the handle is relative to the cap Axial lock. The invention provides a groove capable of locking the handle on the gland of the manual oil pump, so that when the engine is in normal working condition, the handle locks the diaphragm without causing the diaphragm to move autonomously, thereby solving the problem of existing diaphragms. The pump diaphragm is prone to fatigue damage.

Description

A fuel filter seat

Technical field

The invention relates to the field of engine technology, and in particular to a fuel filter seat.

Background technique

The fuel filter holder is used in automobile fuel systems and is mainly used to connect the fuel filter element. At present, when most fuel filter seats are replaced with new filter elements, a large amount of gas accumulates inside the entire filter. If it is not discharged out of the filter, this part of the gas will enter the fuel pipeline and engine ignition system, causing the engine to malfunction. Unable to start normally.

At present, when the engine is in use, the fuel filter failure rate of manual oil pumps with diaphragms (i.e. diaphragm pumps, also called diaphragm pumps) is relatively high. When the engine is working, the fuel pressure fluctuates, causing the diaphragm to move autonomously with a high frequency of movement. Repeated movements of the diaphragm for a long time can easily cause fatigue damage, which in turn affects the use of the diaphragm pump.

Therefore, a new type of fuel filter seat is urgently needed to solve the above problems.

Contents of the invention

The object of the present invention is to provide a fuel filter seat to solve the problem that the diaphragm of the existing diaphragm pump is prone to fatigue damage.

To achieve this goal, the present invention adopts the following technical solutions:

A fuel filter base includes a base body and a manual oil pump located on the base body. It is characterized in that the manual oil pump includes:

A handle located outside the manual oil pump;

A gland, which includes a cap head and a cover plate connected to the cap head, and the cover plate is fixed on the base;

The diaphragm is connected to the handle and is located inside the cover;

When the handle is in the first position relative to the cap, the handle can slide up and down relative to the cap; when it is in the second position, the handle is axially locked relative to the cap.

Preferably, the handle includes:

The cap is provided with a protrusion, and the cap head is slidably arranged inside the cap;

The hollow column has a cavity inside it. The hollow column is located inside the cap and is integrally formed with the cap.

Preferably, the diaphragm is hinged to the cavity of the hollow column through a ball head.

Preferably, the cover head is provided with a chute, and the protrusion slides up and down along the chute.

Preferably, the top of the chute has a groove extending laterally, and the protrusion can abut the inside of the groove.

Preferably, a slideway is connected between the groove and the slideway.

Preferably, a spring is set on the outside of the hollow column, and the spring is arranged between the cap and the cover plate.

Preferably, the seat body is provided with an oil inlet and an oil outlet, and the oil passage formed from the oil inlet to the oil outlet is provided with an oil inlet check valve, an oil outlet check valve and a main check valve.

Preferably, a pump chamber is provided below the diaphragm for fuel to flow through, and the pump chamber is connected to the oil inlet check valve and the oil outlet check valve.

Preferably, the manual oil pump is located on the side where the filtered fuel flows.

Beneficial effects of the present invention:

By arranging a groove on the gland of the manual oil pump that can lock the handle, the invention will not cause the diaphragm to move autonomously when the engine is in normal working condition, thereby solving the problem that the diaphragm of the existing diaphragm pump is prone to fatigue damage. problem; through the hinged connection between the diaphragm and the ball head of the hollow column, stretching can be achieved even when the handle and the diaphragm are not in the same straight line. At the same time, the radial force generated by the handle and the diaphragm being not in the same straight line can also be compensated; through The protrusion on the inner wall of the cap slides up and down along the chute on the cap to prevent the handle from hard stretching of the diaphragm. The manual oil pump is located on the side where the filtered fuel flows, which solves the problem of impurities in the fuel being retained. On the one-way valve of the manual oil pump, the one-way valve plate becomes stuck.

Description of drawings

Figure 1 is a schematic cross-sectional view of a fuel filter seat provided by the present invention;

Figure 2 is a schematic structural diagram of the gland in Figure 1;

Figure 3 is a schematic structural diagram of the handle in Figure 1.

In the picture:

1. Base; 2. Handle; 3. Gland; 4. Diaphragm;

21. Cap; 22. Hollow column; 211. Protrusion;

31. Cover; 32. Cover; 311. Slide; 312. Groove; 313. Slide;

51. Oil inlet check valve; 52. Oil outlet check valve; 53. Main check valve;

61. Oil inlet; 62. Oil outlet; 63. Center oil passage; 64. Pump chamber.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation modes.

As shown in Figure 1, the invention provides a fuel filter base, which includes a base body 1 and a manual oil pump located on the base body 1. The manual oil pump includes a handle 2, a gland 3 and a diaphragm 4, wherein:

The handle 2 is located on the outside of the manual oil pump. The handle 2 and the diaphragm 4 are hinged through the ball head. When the handle 2 and the diaphragm 4 are not in the same straight line, the stretching can also be achieved. At the same time, it can also compensate for the fact that the handle 2 and the diaphragm 4 are not in the same straight line. The radial force generated by a straight line. A diaphragm 4 is provided inside the cover plate 3. The gland 3 is fixed on the base 1 through bolts or screws, and the handle 2 and the diaphragm 4 are jointly installed on the base 1 through the gland 3. A spring is connected between the gland 3 and the handle 2, so that the handle 2 can automatically reset after being pressed, and at the same time, the handle 2 avoids hard stretching of the diaphragm 4, thereby extending the service life of the diaphragm 4.

Specifically, the base body 1 is provided with an oil inlet 61 and an oil outlet 62 inside. The oil passage formed from the oil inlet 61 to the oil outlet 62 is provided with an oil inlet check valve 51 and an oil outlet check valve 52. and main check valve 53. The ports of the oil inlet 61 and the oil outlet 62 of the base body 1 are provided with copper sleeves (not shown in the figure) to ensure that the oil inlet 61 and the oil outlet 62 have higher connection strength. A pump chamber 64 is provided below the diaphragm 4 for fuel to flow through. The pump chamber 64 is connected to the oil inlet check valve 51 and the oil outlet check valve 52 . The main check valve 53 is fixed on the central connecting shaft (not shown in the figure), the other end of the central connecting shaft is connected to the fuel filter (not shown in the figure), and a central oil passage 63 is provided in the central connecting shaft. When the manual oil pump is working, the fuel passes through the oil inlet 61, the fuel filter, and the central oil passage 63 in sequence, and then enters the pump chamber 64 through the oil inlet check valve 51. Press the handle 2, and the fuel passes through the oil outlet from the pump chamber 64. To the valve 52 enter the oil outlet 62. When the manual oil pump is not working and the engine is operating normally, the fuel passes through the oil inlet 61, the fuel filter, the center oil passage 63 in sequence, and then enters the oil outlet 62 through the main one-way valve 53.

Specifically, since the viscosity of the fuel sent from the fuel supply pump is high at low temperatures, in order to meet the requirements of nozzle atomization, the fuel needs to be heated, and the base 1 is also provided with an intelligent temperature control component (not shown in the figure) By using a temperature control switch to judge the ambient temperature and issue a switch command, the heating start temperature and end temperature can be preset to ensure that the fuel viscosity meets the requirements for nozzle atomization. Specifically, the manual oil pump is installed on the side where the fuel flows after filtering by the fuel filter (i.e., the clean side), which solves the problem of impurities in the fuel being retained in the one-way valve of the manual oil pump (i.e., the oil inlet check valve 51 and the oil outlet valve). One-way valve (52)), causing the one-way valve plate to get stuck.

As shown in Figure 2, the gland 3 includes a cover head 31 and a cover plate 32 formed integrally with the cover head 31. The cover head 31 is provided with a chute 311, and a groove 312 extends transversely from the top of the chute 311. The groove 312 and the chute 311 A slideway 313 is connected therebetween, and the vertical height of the slideway 313 is lower than the vertical height of the upper end surface of the cover 31 . When the handle 2 is in the first position relative to the cap 31 (that is, the position of the chute 311), the handle 2 can slide up and down relative to the cap 31; when it is in the second position (that is, the position of the groove 312), the handle 2 can slide relative to the cap 31 Axial lock.

As shown in Figure 3, the handle 2 includes a cap 21 and a hollow column 22. The cap 21 is provided with a protrusion 211, and the hollow column 22 is provided with a cavity. The hollow column 22 and the cap 21 are integrally formed, and the diaphragm 4 passes through The ball head is hinged to the cavity of the hollow column 22 .

When the manual oil pump is working, the cap 31 is slid inside the cap 21 through the protrusion 211 and the chute 311, so that the handle 2 can slide up and down along the chute 311 relative to the gland 3. Furthermore, the diaphragm 4 moves up and down to oppose the pump chamber. 64 produces changes in pressure. When the diaphragm 4 moves upward, the pump chamber 64 has a negative pressure relative to the external pressure. At this time, the fuel enters the pump chamber 64 through the fuel inlet check valve 51; when the diaphragm 4 moves downward, the pump chamber 64 receives pressure from the diaphragm. At this time, the fuel flows from the pump chamber 64 through the oil outlet check valve 52 into the oil outlet 62 .

When the manual oil pump is not working and the engine is operating normally, in order to avoid the autonomous movement of the diaphragm, a limiting structure capable of locking the handle 2 is provided on the cover head 31, thereby locking the diaphragm 4 so that it will not be affected by the fuel pressure. It moves autonomously by toggle. Specifically, the limiting structure is a groove 312 extending laterally on the top of the chute 311. The vertical height of the chute 313 connected between the groove 312 and the chute 311 is lower than the vertical height of the upper end surface of the cap 32. . Considering that when the diaphragm 4 is at the top height of the pump chamber 64, the protrusion 211 is still inside the chute 311, a slideway 313 is laterally opened in the middle and upper part of the chute 311 so that the protrusion 211 can escape from the chute 311. Entering the groove 313, and furthermore, since the protrusion 211 contacts the bottom of the groove 312, the position limiting function of the handle 2 is realized. Furthermore, both sides of the groove 312 can play a role in limiting the left and right positions of the protrusion 211, so that the gland 3 and the handle 2 can be better fixed and limited, that is, the diaphragm 4 is not positioned relative to the gland 3. It will move up and down to complete the position limit, avoiding fatigue damage to the diaphragm 4 due to repeated movements. Furthermore, by optimizing the structures of the gland 3 and the handle 2, the mold can be molded in one step. The gland 3 and the handle 2 involved in this embodiment are both one-time molding structures, without the need for secondary processing, which reduces production and processing costs. .

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For ordinary technical users in the field, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. A fuel filter seat, including a seat (1) and a manual oil pump located on the seat (1), characterized in that the manual oil pump includes: Handle (2), which is located outside the manual oil pump; Pressure cover (3), which includes a cover head (31) and a cover plate (32) connected to the cover head (31), and the cover plate (32) is fixed on the base body (1); A diaphragm (4), which is connected to the handle (2) and is located inside the cover (32); When the handle (2) is in the first position relative to the cap (31), the handle (2) can slide up and down relative to the cap (31); when it is in the second position, the handle (2) It is axially locked relative to the cover head (31). 2. The fuel filter seat according to claim 1, characterized in that the handle (2) includes: The cap (21) is provided with a protrusion (211) inside, and the cap (31) is slidably installed inside the cap (21); A hollow column (22) has a cavity inside it. The hollow column (22) is located inside the cap (21) and is integrally formed with the cap (21). 3. The fuel filter seat according to claim 2, characterized in that the diaphragm (4) is hinged to the cavity of the hollow column (22) through a ball head. 4. The fuel filter seat according to claim 2, characterized in that the cover head (31) is provided with a chute (311), and the protrusion (211) can move up and down along the chute (311). slide. 5. The fuel filter seat according to claim 4, characterized in that a groove (312) extends transversely from the top of the chute (311), and the protrusion (211) can abut against the Inside the groove (312). 6. The fuel filter seat according to claim 5, characterized in that a slideway (313) is connected between the groove (312) and the slide groove (311). 7. The fuel filter seat according to claim 2, characterized in that a spring is set outside the hollow column (22), and the spring is provided on the cap (21) and the cover plate (21). 32) between. 8. The fuel filter seat according to claim 1, characterized in that the seat (1) is provided with an oil inlet (61) and an oil outlet (62), and the oil inlet (62) is The oil passage formed from 61) to the oil outlet (62) is provided with an oil inlet check valve (51), an oil outlet check valve (52) and a main check valve (53). 9. The fuel filter seat according to claim 8, characterized in that a pump chamber (64) for fuel to flow is provided below the diaphragm (4), and the pump chamber (64) and the The oil inlet check valve (51) is connected with the oil outlet check valve (52). 10. The fuel filter seat according to any one of claims 1 to 9, characterized in that the manual oil pump is provided on a side through which the filtered fuel flows.