Novel safety valve suitable for national sixth vehicle type

Abstract

The utility model discloses a novel safety valve suitable for national six vehicle types, which is characterized in that a fine filter is arranged in an oil storage barrel; a fuel pump is arranged between the fine filter and the oil storage barrel; the pipe joint is mounted at an oil outlet of the fine filter; the safety valve is arranged in the pipe joint, the pipe joint end cover is installed on the pipe joint, the safety valve is fixed in the pipe joint, and the pipe joint end cover and the pipe joint can be communicated or closed through the safety valve. The end, away from the pipe joint, of the pipe joint end cover communicates with the oil storage barrel through a first corrugated pipe. The pipe joint is in press-fitting connection with the flange plate through the second corrugated pipe. By means of the application of the safety valve, the novel safety valve suitable for the national sixth vehicle type is provided, the structure is simple, the cost is low, pressure can be rapidly released after a fuel pump stops working, part of pressure in a pipeline can be reserved to meet the requirement for rapid starting of the whole vehicle, and noise generated when the safety valve is opened is lowered.

Description

Technical Field

[0001] The utility model relates to related technical fields such as automobile fuel systems, and particularly relates to a new safety valve applicable to national VI models. Background Art

[0002] The safety valve is also called a pressure relief valve. The safety valve is installed in the fuel pump. Its main function is to automatically open and relieve pressure when the pressure in the fuel pump or pipeline exceeds the set pressure of the safety valve, ensuring that the pressure of the medium in the fuel pump and pipeline is below the set pressure, protecting the fuel pump and pipeline, and preventing accidents.

[0003] When the whole vehicle shuts down after normal startup and the fuel pump stops working, a sealed cavity will be formed in the fuel pump pipeline to maintain pressure, so as to ensure that when the whole vehicle starts again, the fuel pump can instantly build pressure to quickly start the whole vehicle. However, the existing safety valve has a complex structure and high cost.

[0004] At present, the development and regulations in the automotive industry are becoming increasingly strict, and the requirements for the fuel supply system are getting higher and higher. The safety valve needs to protect the fuel pump and pipeline, and also needs to protect the safety of maintenance personnel when performing vehicle maintenance on the fuel pump under the pressure-holding state. Therefore, a new type of safety valve is needed to quickly relieve pressure after the fuel pump stops working and also retain part of the pressure in the pipeline to meet the quick startup of the whole vehicle, and the noise problem generated when the safety valve opens needs to be ensured. Content of the Utility Model

[0005] In view of this, to solve the above problems, the purpose of the utility model is to provide a new safety valve applicable to national VI models, which includes:

[0006] An oil storage barrel, a fine filter, a safety valve, a pipe joint, a pipe joint end cover, a flange, and a fuel pump;

[0007] The fine filter is installed inside the oil storage barrel;

[0008] A fuel pump is provided between the fine filter and the oil storage barrel;

[0009] The pipe joint is installed at the oil outlet of the fine filter;

[0010] The safety valve is arranged inside the pipe joint. The pipe joint end cover is installed on the pipe joint to fix the safety valve inside the pipe joint. The pipe joint end cover and the pipe joint can be communicated or closed through the safety valve;

[0011] One end of the pipe joint end cover far from the pipe joint is communicated with the oil storage barrel through a first corrugated pipe;

[0012] The pipe joint and the flange are press-fitted and connected through a second corrugated pipe.

[0013] The above-mentioned novel safety valve applicable to the National VI vehicle models, wherein the safety valve includes: a gasket, a main valve, and a safety valve spring; one end of the main valve is provided with a groove, the gasket is installed in the groove, the groove communicates with the safety valve hole of the pipe joint, the main valve is sealed with the pipe joint through the gasket, the safety valve spring is installed inside the main valve, and the diffraction hole of the main valve communicates with the end cover of the pipe joint.

[0014] The above-mentioned novel safety valve applicable to the National VI vehicle models, wherein the pipe joint is sleeved on the oil outlet of the fine filter, and an O-ring is provided between the pipe joint and the oil outlet of the fine filter.

[0015] The above-mentioned novel safety valve applicable to the National VI vehicle models, wherein the end of the pipe joint close to the oil outlet of the fine filter is circumferentially provided with an installation groove, the clamp is clamped in the installation groove, and the clamp fixes the pipe joint to the oil outlet of the fine filter.

[0016] The above-mentioned novel safety valve applicable to the National VI vehicle models, further including: a grounding piece; the grounding piece is installed on the pipe joint.

[0017] The above-mentioned novel safety valve applicable to the National VI vehicle models, further including: a wiring harness component; one end of the wiring harness component is inserted and connected to the fine filter and the grounding piece, and the other end of the wiring harness component is welded to the negative pole of the fuel pump.

[0018] The above-mentioned novel safety valve applicable to the National VI vehicle models, wherein the end cover of the pipe joint is installed on the pipe joint by laser welding.

[0019] The positive effects of the above technical solution compared with the prior art are:

[0020] By applying the present utility model, a novel safety valve applicable to the National VI vehicle models is provided. The device has a simple structure, low cost, and can quickly relieve pressure after the fuel pump stops working, and can also retain part of the pressure in the pipeline to meet the rapid start of the whole vehicle, and the noise generated when the safety valve opens is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly schematic diagram of a novel safety valve applicable to the National VI vehicle models of the present utility model.

[0022] Figure 2 It is an exploded view of a novel safety valve applicable to the National VI vehicle models of the present utility model.

[0023] Figure 3 It is a partial cross-sectional view of a novel safety valve applicable to the National VI vehicle models of the present utility model.

[0024] Figure 4 This is a schematic assembly diagram of a new type of safety valve applicable to National VI vehicles of the present utility model.

[0025] 1. Oil storage barrel; 2. Fine filter; 3. Pipe joint; 4. Pipe joint end cover; 5. Flange; 6. First bellows; 7. Second bellows; 8. Gasket; 9. Main valve; 10. Safety valve spring; 11. Groove; 12. O-ring; 13. Clamp; 14. Fuel pump; 15. Grounding plate; 16. Wiring harness component; 17. Safety valve hole; 18. Diffraction hole; 19. Installation groove. Specific embodiments

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present utility model.

[0027] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not intended to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not intended to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0028] As Figures 1 to 4 shown, a new type of safety valve applicable to National VI vehicles in a preferred embodiment is shown, which includes: an oil storage barrel 1, a fine filter 2, a safety valve, a pipe joint 3, a pipe joint end cover 4, and a flange 5.

[0029] The fine filter 2 is installed inside the oil storage barrel 1; a fuel pump 14 is provided between the fine filter 2 and the oil storage barrel 1; the pipe joint 3 is installed at the oil outlet of the fine filter 2; the safety valve is arranged inside the pipe joint 3, and the pipe joint end cover 4 is installed on the pipe joint 3 to fix the safety valve inside the pipe joint 3. The pipe joint end cover 4 and the pipe joint 3 can be connected or closed through the safety valve; one end of the pipe joint end cover 4 away from the pipe joint 3 is connected to the oil storage barrel 1 through the first bellows 6; the pipe joint 3 and the flange 5 are press-fitted and connected through the second bellows 7.

[0030] During actual use, the fuel pump 14 sucks out the fuel in the fuel storage barrel 1, causing the fuel to enter the fine filter 2. The safety valve is arranged inside the pipe joint 3. The preset system pressure is 550 kPa, and the opening pressure of the safety valve is 450 kPa. The pipeline pressure can drop from 550 kPa to 350 kPa within 2 minutes after the fuel pump is closed. At this time, the pipeline pressure is less than the set point pressure of the safety valve and cannot open the safety valve. The spring pressure of the safety valve makes the gasket contact the plane of the safety valve hole of the pipe joint to form pressure retention in the fuel pump cavity. The pressure is > 245 kPa within 20 minutes and > 120 kPa within 18 hours. The spring pressure of the adjustable safety valve is applicable to different pressure relief requirements.

[0031] And the pipe joint end cover 4 is connected to the first corrugated pipe 6. The other end of the first corrugated pipe 6 is placed in the fuel storage barrel 1, which can reduce the flowing water noise when the safety valve opens and increase the oil suction efficiency of the fuel storage barrel 1.

[0032] The present utility model further has the following embodiments on the above basis:

[0033] Furthermore, a new type of safety valve applicable to national VI models, wherein the safety valve includes: a gasket 8, a main valve 9, and a safety valve spring 10; a groove 11 is provided at one end of the main valve 9, the gasket 8 is installed in the groove 11, and the groove 11 communicates with the safety valve hole 17 of the pipe joint 3. The main valve is sealed with the pipe joint through the gasket 8. The safety valve spring 10 is installed inside the main valve 9, and the diffraction hole 18 of the main valve 9 communicates with the pipe joint end cover 4. Specifically, the gasket 8 is installed in the groove 11 at one end of the main valve 9, so that the main valve 9 is sealed with the safety valve hole 17 of the pipe joint 3. The safety valve spring 10 is installed inside the cavity of the main valve 9 and forms a safety valve with the main valve 9. When the fuel pump 14 works, the safety valve is in an open state all the time, and when the fuel pump 14 is closed, the safety valve is closed.

[0034] Furthermore, a new type of safety valve applicable to national VI models, wherein the pipe joint 3 is sleeved on the oil outlet of the fine filter 2, and an O-ring is provided between the pipe joint 3 and the oil outlet of the fine filter 2. Specifically, the O-ring increases the sealing performance between the pipe joint 3 and the fine filter 2.

[0035] Furthermore, a new type of safety valve applicable to national VI models, wherein an installation groove 19 is circumferentially provided at one end of the pipe joint 3 close to the oil outlet of the fine filter 2, and a clamp 13 is clamped in the installation groove 19. The clamp 13 fixes the pipe joint 3 to the oil outlet of the fine filter 2. Specifically, the pipe joint is clamped to the oil outlet of the fine filter 2 through the clamp 13.

[0036] Furthermore, a new type of safety valve applicable to national VI models, wherein it further includes: a grounding plate 15; the grounding plate 15 is installed on the pipe joint 3. Specifically, the grounding plate 15 can ground the safety valve, so that the static electricity generated by the friction between the first corrugated pipe 6 and the oil can be smoothly led to the negative pole through the grounding plate 15.

[0037] Further, a new type of safety valve applicable to the National VI models, further comprising: a wiring harness component 16; one end of the wiring harness component 16 is inserted into the fine filter 2 and the grounding plate 15, and the other end of the wiring harness component 16 is welded to the negative pole of the fuel pump 14.

[0038] Further, a new type of safety valve applicable to the National VI models, wherein the pipe joint end cover 4 is installed on the pipe joint 3 by laser welding. Specifically, the pipe joint end cover 4 and the pipe joint 3 are sealed by laser welding.

[0039] In a preferred embodiment, to prevent the opening of the safety valve from affecting the fuel supply flow when the oil pump is working, the diameter of the diffraction hole 18 of the safety valve is set to φ0.5 mm.

[0040] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be able to realize that the solutions obtained by equivalent substitution and obvious changes made by using the specification and illustrated content of the present invention should be included in the protection scope of the present invention.

Claims

1. A new safety valve suitable for National VI vehicles, characterized in that: include: Oil storage barrel, fine filter, safety valve, pipe joint, pipe joint end cover, flange, fuel pump; The fine filter is installed inside the oil storage barrel; A fuel pump is provided between the fine filter and the oil storage barrel; The pipe joint is installed at the oil outlet of the fine filter; The safety valve is arranged inside the pipe joint, the pipe joint end cover is installed on the pipe joint, the safety valve is fixed inside the pipe joint, and the pipe joint end cover and the pipe joint can be connected or closed through the safety valve; One end of the pipe joint end cover away from the pipe joint is connected to the oil storage barrel through a first bellows; The pipe joint is press-fitted with the flange through a second corrugated pipe.

2. A new safety valve suitable for National VI vehicles according to claim 1, characterized in that: The safety valve comprises: a sealing gasket, a main valve, and a safety valve spring; a groove is provided at one end of the main valve, the sealing gasket is installed in the groove, the groove is communicated with the safety valve hole of the pipe joint, the main valve is sealed with the pipe joint through the sealing gasket, the safety valve spring is installed inside the main valve, and the diffraction hole of the main valve is communicated with the end cover of the pipe joint.

3. A new safety valve suitable for National VI vehicles according to claim 1, characterized in that: The pipe joint is sleeved on the oil outlet of the fine filter, and an O-ring is arranged between the pipe joint and the oil outlet of the fine filter.

4. A new safety valve suitable for National VI vehicles according to claim 1, characterized in that: An end of the pipe joint close to the oil outlet of the fine filter is circumferentially provided with a mounting groove, and a clamp is clamped in the mounting groove, and the clamp fixes the pipe joint to the oil outlet of the fine filter.

5. The new safety valve suitable for National VI vehicles according to claim 1 is characterized in that: Also includes: Grounding strap; The grounding plate is mounted on the pipe joint.

6. A new safety valve suitable for National VI vehicles according to claim 5, characterized in that: Also includes: A wiring harness component; one end of the wiring harness component is plugged into the fine filter and the grounding plate, and the other end of the wiring harness component is welded to the negative electrode of the fuel pump.

7. A new safety valve suitable for National VI vehicles according to claim 1, characterized in that: The pipe joint end cover is mounted on the pipe joint by laser welding.

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