A filter for preventing gasoline backflow

Abstract

The utility model relates to a filter for preventing gasoline backflow, comprising: a filter cartridge, and also comprising: a cover, the cover is fixedly mounted on the end of the filter cartridge; a filter mechanism, the filter mechanism is arranged on one side of the cover and is located inside the filter cartridge; a check mechanism, the check mechanism is arranged between the cover and the filter mechanism; a pressure relief mechanism, the pressure relief mechanism is arranged at one end of the inner cavity of the filter mechanism, a positioning spring is fixedly mounted at the bottom of the inner cavity of the filter cartridge, a threaded interface is provided in the middle part of the cover, and an oil inlet is provided on the surface of the cover. The utility model can effectively prevent gasoline backflow through the arrangement of the check mechanism, and can ensure that the gasoline pressure and supply in the fuel system remain stable, which helps the engine obtain sufficient fuel supply when needed, ensures the power performance and stability of the vehicle, and also helps to improve the efficiency of fuel use, reduce fuel consumption, and reduce vehicle operating costs.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter for preventing gasoline reflux. Background Art

[0002] Gasoline filter, also known as gasoline filter for short, is an important part of the automobile fuel system. Its main function is to filter out impurities in gasoline, ensure the normal operation of the fuel system, and extend the service life of the engine. Gasoline filters are divided into carburetor type and electronic fuel injection type, which are suitable for different types of gasoline engines.

[0003] Existing gasoline filters cannot effectively prevent gasoline backflow during use and have poor sealing. Gasoline backflow will cause a reduction in the effective supply of gasoline in the fuel system, making it impossible for the engine to get enough fuel when it needs more fuel. This may lead to a decrease in engine power, weakened acceleration performance, and even difficulty starting or stalling in some cases. Utility Model Content

[0004] The purpose of the utility model is to provide a filter for preventing gasoline backflow, which has the advantages of high-efficiency filtering ability, preventing gasoline backflow, automatic pressure relief protection and good sealing performance, and solves the problems raised by the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising: a filter cartridge, and also comprising:

[0006] A sealing cover, the sealing cover is fixedly mounted on the end of the filter cartridge;

[0007] A filter mechanism, the filter mechanism is arranged on one side of the cover and is located inside the filter cartridge;

[0008] A non-return mechanism, wherein the non-return mechanism is arranged between the sealing cover and the filtering mechanism;

[0009] The pressure relief mechanism is arranged at one end of the inner cavity of the filter mechanism.

[0010] Furthermore, as a preferred embodiment of the utility model, a positioning spring is fixedly installed at the bottom of the inner cavity of the filter cartridge, a threaded interface is provided in the middle portion of the cover, an oil inlet is provided on the surface of the cover, a mounting groove is provided on the surface of the cover, and a sealing ring is provided inside the mounting groove.

[0011] Furthermore, as a preferred embodiment of the utility model, the filtering mechanism includes a connecting rod fixedly connected to the sealing cover, a clean oil outlet is opened at the center of the connecting rod, and the clean oil outlet is communicated with the threaded interface, the end of the connecting rod is fixedly connected to a center tube, both sides of the center tube are fixedly installed with clamping edges, the outer side of the center tube is sleeved with filter paper, a positioning tube is fixedly installed at the end of the center tube, a sliding groove is opened on the surface of the connecting rod, the filter paper is fixed to the outer side of the center tube by the clamping edge, a plurality of through holes are evenly arranged on the surface of the center tube, and the end of the positioning tube is inserted into the inner side of the positioning spring.

[0012] Furthermore, as a preferred embodiment of the utility model, the non-return mechanism includes a sleeve fixedly mounted on one side of the clamping edge, a piston rod is slidably mounted inside the sleeve, a mounting ring is fixedly connected to the end of the piston rod, a sealing gasket is fixedly mounted on one side of the mounting ring, a non-return spring is sleeved on the outer side of the sleeve, a slider is fixedly mounted on the inner side of the mounting ring, and the slider is slidably mounted inside the slide groove.

[0013] Furthermore, as a preferred embodiment of the utility model, the pressure relief mechanism includes a mounting column fixedly mounted on the end of the positioning tube, a bypass hole is opened on the surface of the mounting column, a return spring is arranged in the inner cavity of the mounting column, and a valve is fixedly connected to the end of the return spring.

[0014] Beneficial effects: The technical solution of the present application has the following technical effects: the utility model can effectively prevent gasoline backflow through the setting of the non-return mechanism, and can ensure that the gasoline pressure and supply in the fuel system remain stable, which helps the engine to obtain sufficient fuel supply when needed, ensures the vehicle's power performance and stability, and also helps to improve fuel utilization efficiency, reduce fuel consumption, and reduce vehicle operating costs.

[0015] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 3It is a bottom view of the local structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the filter mechanism of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the non-return mechanism of the utility model;

[0022] Figure 6 It is a structural sectional view of the pressure relief mechanism of the utility model.

[0023] In the figure, the meanings of the various reference numerals are as follows: 1. filter cartridge; 2. sealing cover; 201. threaded interface; 202. oil inlet; 203. mounting groove; 204. sealing ring; 3. filtering mechanism; 301. connecting rod; 302. center tube; 303. clamping edge; 304. filter paper; 305. positioning tube; 306. slide groove; 4. non-return mechanism; 401. sleeve; 402. piston rod; 403. mounting ring; 404. sealing gasket; 405. non-return spring; 406. slider; 5. pressure relief mechanism; 501. mounting column; 502. bypass hole; 503. reset spring; 504. valve; 6. positioning spring. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] As attached Figure 1 To Attachment Figure 6 As shown: This embodiment provides a filter for preventing gasoline backflow, including: a filter cartridge 1, and also including:

[0026] A sealing cover 2, which is fixedly mounted on the end of the filter cartridge 1;

[0027] The filter mechanism 3 is arranged on one side of the cover 2 and is located inside the filter cartridge 1;

[0028] The non-return mechanism 4 is arranged between the sealing cover 2 and the filtering mechanism 3;

[0029] The pressure relief mechanism 5 is arranged at one end of the inner cavity of the filter mechanism 3 .

[0030] Specifically, a positioning spring 6 is fixedly installed at the bottom of the inner cavity of the filter cartridge 1, a threaded interface 201 is provided in the middle of the cover 2, an oil inlet 202 is provided on the surface of the cover 2, a mounting groove 203 is provided on the surface of the cover 2, and a sealing ring 204 is sleeved inside the mounting groove 203.

[0031] In this embodiment: the filter cartridge 1 provides a basic structure and space for the filter, which can accommodate and support other components; the cover 2 not only provides a connection interface, but also ensures the sealing and safety of the filter; the threaded interface 201 is connected to the connecting pipe or other equipment to ensure that gasoline can smoothly enter the filter; the oil inlet 202 is the entrance for gasoline to enter the filter; the installation groove 203 and the sealing ring 204 are arranged to ensure the sealing between the filter and other structures to prevent gasoline leakage.

[0032] Specifically, the filtering mechanism 3 includes a connecting rod 301 fixedly connected to the sealing cover 2, a clean oil outlet is provided at the center of the connecting rod 301, and the clean oil outlet is communicated with the threaded interface 201, the end of the connecting rod 301 is fixedly connected to a central tube 302, both sides of the central tube 302 are fixedly installed with clamping edges 303, the outer side of the central tube 302 is sleeved with filter paper 304, the end of the central tube 302 is fixedly installed with a positioning tube 305, a slide groove 306 is provided on the surface of the connecting rod 301, the filter paper 304 is fixed to the outer side of the central tube 302 through the clamping edge 303, a plurality of through holes are evenly arranged on the surface of the central tube 302, and the end of the positioning tube 305 is inserted into the inner side of the positioning spring 6.

[0033] In this embodiment: the connecting rod 301 and the central tube 302 constitute a circulation channel for gasoline, the filter paper 304 is used to filter impurities and pollutants in the gasoline, the positioning tube 305 is used to locate the position of the filter mechanism 3 in the filter cartridge 1, and is supported by the positioning spring 6, the slide groove 306 provides a sliding track for the slider 406, and works in conjunction with the check mechanism 4. Through the setting of the filter mechanism 3, impurities in the gasoline can be effectively removed to ensure the cleanliness of the gasoline.

[0034] Specifically, the non-return mechanism 4 includes a sleeve 401 fixedly mounted on one side of the clamping edge 303, a piston rod 402 is slidably mounted inside the sleeve 401, a mounting ring 403 is fixedly connected to the end of the piston rod 402, a sealing gasket 404 is fixedly mounted on one side of the mounting ring 403, a non-return spring 405 is sleeved on the outer side of the sleeve 401, a slider 406 is fixedly mounted on the inner side of the mounting ring 403, and the slider 406 is slidably mounted inside the slide groove 306.

[0035] In this embodiment: through the carefully designed non-return mechanism 4, the filter can effectively prevent the backflow of gasoline in the filter, thereby ensuring the stable operation of the filter. In the case of gasoline backflow, the sealing gasket 404 fits tightly under the strong elastic force of the non-return spring 405, effectively preventing the backflow of gasoline. The elastic force provided by the non-return spring 405 not only ensures the tight fit between the sealing gasket 404 and the oil inlet 202, but also further improves the overall sealing of the filter. In addition, the stable sliding of the slider 406 in the slide groove 306 effectively prevents the possible deviation of the mounting ring 403 during the movement, thereby enhancing the stability and reliability of the non-return mechanism 4 and ensuring the normal operation of the filter under various working conditions.

[0036] Specifically, the pressure relief mechanism 5 includes a mounting column 501 fixedly mounted on the end of the positioning tube 305 , a bypass hole 502 is opened on the surface of the mounting column 501 , a return spring 503 is provided in the inner cavity of the mounting column 501 , and a valve 504 is fixedly connected to the end of the return spring 503 .

[0037] In this embodiment: when the internal pressure of the filter increases abnormally, the filter can automatically release the pressure through the carefully designed pressure relief mechanism 5, thereby effectively protecting the filter from damage. Under normal working conditions, the valve 504 fits tightly against the inner wall of the positioning tube 305 under the elastic force of the return spring 503, forming a reliable seal, ensuring that unfiltered gasoline cannot flow into the center tube 302 through the bypass hole 502, thereby ensuring the filtering effect of the filter. However, when the internal pressure of the filter exceeds the preset safety threshold, the increased pressure will push the valve 504 to overcome the elastic force of the return spring 503, so that the valve 504 is separated from the positioning tube 305. At this time, the gasoline can be discharged smoothly through the bypass hole 502, thereby avoiding the filter from being damaged due to excessive internal pressure, thereby ensuring the reliability and durability of the filter.

[0038] The working principle and use process of this utility model:

[0039] The gasoline entering the filter is filtered by the filter paper 304 in the filter mechanism 3 to remove impurities and pollutants therein, thereby ensuring the cleanliness of the gasoline. The gasoline backflow is prevented by the check mechanism 4 to ensure the normal operation of the filter. When in use, the gasoline enters the filter through the oil inlet 202 on the cover 2, and is first filtered by the filter paper 304 in the filter mechanism 3 to remove impurities and pollutants therein. The clean gasoline filtered by the filter paper 304 enters the central clean oil outlet of the connecting rod 301 through the through hole of the central tube 302, and flows out of the filter through the threaded interface 201 to be supplied to the engine for use. When the engine stops working In case of oil or gasoline backflow, the sealing gasket 404 in the non-return mechanism 4 is tightly fitted with the oil inlet 202 under the action of the non-return spring 405, preventing the gasoline from flowing back into the filter; when the internal pressure of the filter increases abnormally and exceeds the preset safety threshold, the valve 504 in the pressure relief mechanism 5 is pushed open by the internal pressure and separated from the positioning tube 305, and the gasoline is discharged from the filter through the bypass hole 502, reducing the internal pressure and protecting the filter from damage; when the internal pressure of the filter drops to a safe range, the reset spring 503 pushes the valve 504 to close the bypass hole 502 again, so that the filter returns to normal working state.

[0040] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A filter for preventing gasoline backflow, comprising: The filter cartridge (1) is characterized in that it also includes: A sealing cover (2), wherein the sealing cover (2) is fixedly mounted on an end of the filter cartridge (1); A filtering mechanism (3), wherein the filtering mechanism (3) is arranged on one side of the cover (2) and is located inside the filter cartridge (1); A non-return mechanism (4), wherein the non-return mechanism (4) is arranged between the sealing cover (2) and the filtering mechanism (3); A pressure relief mechanism (5), wherein the pressure relief mechanism (5) is arranged at one end of the inner cavity of the filter mechanism (3).

2. A filter for preventing gasoline backflow according to claim 1, characterized in that: A positioning spring (6) is fixedly installed at the bottom of the inner cavity of the filter cartridge (1), a threaded interface (201) is provided in the middle of the sealing cover (2), and an oil inlet (202) is provided on the surface of the sealing cover (2).

3. A filter for preventing gasoline backflow according to claim 1, characterized in that: A mounting groove (203) is provided on the surface of the sealing cover (2), and a sealing ring (204) is sleeved inside the mounting groove (203).

4. A filter for preventing gasoline backflow according to claim 1, characterized in that: The filtering mechanism (3) comprises a connecting rod (301) fixedly connected to the sealing cover (2); a clean oil outlet is provided at the center of the connecting rod (301), and the clean oil outlet is communicated with the threaded interface (201); a central tube (302) is fixedly connected to the end of the connecting rod (301); clamping edges (303) are fixedly installed on both sides of the central tube (302); a filter paper (304) is sleeved on the outer side of the central tube (302); a positioning tube (305) is fixedly installed at the end of the central tube (302); and a sliding groove (306) is provided on the surface of the connecting rod (301).

5. A filter for preventing gasoline backflow according to claim 4, characterized in that: The filter paper (304) is fixed to the outside of the central tube (302) by means of a clamping edge (303); a plurality of through holes are evenly arranged on the surface of the central tube (302); and the end of the positioning tube (305) is inserted into the inside of the positioning spring (6).

6. A filter for preventing gasoline backflow according to claim 1, characterized in that: The non-return mechanism (4) comprises a sleeve (401) fixedly mounted on one side of the clamping edge (303), a piston rod (402) being slidably mounted inside the sleeve (401), a mounting ring (403) being fixedly connected to the end of the piston rod (402), a sealing gasket (404) being fixedly mounted on one side of the mounting ring (403), a non-return spring (405) being sleeved on the outer side of the sleeve (401), a slider (406) being fixedly mounted on the inner side of the mounting ring (403), and the slider (406) being slidably mounted inside the slide groove (306).

7. A filter for preventing gasoline backflow according to claim 1, characterized in that: The pressure relief mechanism (5) comprises a mounting column (501) fixedly mounted on the end of the positioning tube (305), a bypass hole (502) being provided on the surface of the mounting column (501), a return spring (503) being provided in the inner cavity of the mounting column (501), and a valve (504) being fixedly connected to the end of the return spring (503).

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