Gasoline filter with upper cover rotary melting type completely-sealed pressure valve

Abstract

The utility model discloses a gasoline filter with an upper cover rotary melting type complete sealing pressure valve, which is characterized in that a rigid sealing structure is formed by a rotary melting welding upper cover cavity and a lower sealing cover, the complete sealing of the pressure valve is realized by combining with the precise matching of an annular groove and a positioning ring, and the problem of untight sealing caused by vibration of a traditional filter is solved. The fuel injection device structurally comprises a shell, a filter element, an upper cover cavity, a lower sealing cover, a pressure valve with a positioning ring and a double-insertion-ring filter element fixing device, the upper cover cavity and the lower sealing cover are welded in a rotary fusion mode, the pressure valve regulates and controls fuel pressure through an elastic membrane and a compression spring, it is ensured that the fuel injection quantity is accurately controlled, and the power stability of an engine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile fuel system, specifically relates to a gasoline filter with upper cover spin fusion type completely sealed pressure valve. BACKGROUND

[0002] The gasoline filter is mainly used on the automobile using gasoline as fuel, and mainly functions for filtering gasoline. The general gasoline filter is provided with a pressure valve, which adjusts fuel pressure through the pressure valve to keep the fuel pressure balanced and ensure the accurate control of fuel injection quantity. The pressure valve of the existing gasoline filter is sealed by elastic compression of a sealing ring, and the structure is loose. Vehicle vibration can easily lead to poor sealing, causing problems such as unstable fuel pressure, injection quantity control deviation, and power limitation. SUMMARY

[0003] To solve the above problems, the utility model provides a gasoline filter with upper cover spin fusion type completely sealed pressure valve, which forms a rigid sealing structure by spin fusion welding of the upper cover cavity and the lower cover, and realizes the complete sealing of the pressure valve through the precise cooperation of the annular groove and the positioning ring, solves the problem of sealing failure caused by vibration, and ensures the stable fuel pressure and accurate injection quantity control.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a gasoline filter with upper cover spin fusion type completely sealed pressure valve, characterized by comprising:

[0005] A housing is provided with an oil inlet pipe, an oil outlet pipe and an oil return pipe, and an annular filter element and a pressure valve are arranged inside the housing;

[0006] A positioning chamber is arranged in the housing to fix the filter element;

[0007] An upper cover cavity is integrally formed with the housing and communicates with the oil return pipe, and a lower cover is sealingly connected to the lower opening of the upper cover cavity by spin fusion welding;

[0008] An annular groove is arranged between the upper cover cavity and the lower cover, and a positioning ring is arranged on the outer periphery of the pressure valve, and the positioning ring is inserted into the annular groove through a sealing ring;

[0009] A first ring and a second ring are arranged, the first ring is arranged on the lower end surface of the lower cover, and the second ring is arranged on the bottom of the positioning chamber to fix the filter element;

[0010] The pressure valve comprises a shell, an elastic diaphragm arranged in the shell, an oil passage arranged in the middle of the elastic diaphragm, a spring seat welded on the upper position of the oil passage above the elastic diaphragm, a blocking block welded on the lower position of the oil passage below the elastic diaphragm, a compression spring arranged between the spring seat and the upper end face of the inner cavity of the shell, a blocking base corresponding to the blocking block in the upper and lower directions mounted on the lower end of the inner cavity of the shell, and a circular groove arranged on the blocking base and matched with the part of the oil passage extending out of the blocking block.

[0011] The lower cover and the upper cover cavity are rigidly and sealingly connected through fusion welding.

[0012] The first insertion ring is inserted into the middle hole of the filter core, and the second insertion ring is inserted into the other-end middle hole of the filter core, so that the axial positioning of the filter core is realized.

[0013] The blocking block is in contact with the blocking base under the action of the compression spring, and the end of the oil passage is inserted into the circular groove of the blocking base.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The fusion welding structure replaces the elastic sealing, has strong anti-vibration capacity and high sealing reliability;

[0016] 2. The annular groove is precisely matched with the positioning ring, the pressure valve is precisely positioned, and leakage caused by deviation is avoided;

[0017] 3. The double-insertion-ring structure stably fixes the filter core, and prolongs the service life of the filter;

[0018] 4. The pressure valve is sensitive in response, effectively maintains the stability of fuel pressure, and improves the power performance of the engine.

[0019] The utility model will be further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of the specific embodiment of the utility model;

[0021] Figure 2 It is the sectional view of the specific embodiment of the utility model;

[0022] Figure 3 It is Figure 2 The enlarged view of the middle A.

[0023] Explanation of reference numerals in the attached drawings: 1-Outer shell, 2-Inlet pipe, 3-Outlet pipe, 4-Return pipe, 5-Filter element, 6-Positioning chamber, 7-Upper cover cavity, 8-Lower cover, 9-Annular groove, 10-Pressure valve, 11-Positioning ring, 12-Sealing ring, 13-First insert ring, 14-Second insert ring, 15-Shell, 16-Elastic diaphragm, 17-Oil passage pipe, 18-Spring seat, 19-Blocking block, 20-Compression spring, 21-Blocking base, 22-Circular groove, 23-Oil passage hole, 24-Outlet hole. Detailed Implementation

[0024] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] like Figure 1 — Figure 3 As shown, this embodiment discloses a gasoline filter with a top-covered spin-welded fully sealed pressure valve, comprising:

[0026] The outer casing 1 is provided with an oil inlet pipe 2, an oil outlet pipe 3 and an oil return pipe 4. An annular filter element 5 and a pressure valve 10 are installed inside. The outer casing 1 is divided into upper and lower parts. The upper and lower parts of the outer casing 1 are connected by a mounting bracket after the upper and lower parts are fitted together.

[0027] The positioning chamber 6 is disposed inside the outer shell 1 and is used to fix the filter element 5;

[0028] The upper cover cavity 7 is integrally formed with the outer shell 1 and communicates with the oil return pipe 4. Its lower opening is sealed with a lower cover 8 by spin welding.

[0029] An annular groove 9 is provided between the upper cover cavity 7 and the lower cover 8. A positioning ring 11 is provided on the outer periphery of the pressure valve 10. The positioning ring 11 is inserted into the annular groove 9 through a sealing ring 12.

[0030] It also includes a first insert ring and a second insert ring. The first insert ring 13 is disposed on the lower end face of the lower cover 8, and the second insert ring 14 is placed at the bottom of the positioning chamber 6 to fix the filter element 5.

[0031] The pressure valve 10 comprises a shell 15, an elastic diaphragm 16 is arranged in the shell 15, an oil passage 17 is arranged in the middle of the elastic diaphragm 16, a spring seat 18 is welded at the position above the elastic diaphragm 16, a blocking block 19 is welded at the position below the elastic diaphragm 16, a compression spring 20 is arranged between the spring seat 18 and the upper end face of the inner cavity of the shell 15, a blocking base 21 corresponding to the blocking block 19 is arranged at the lower end of the inner cavity of the shell 15, a circular groove 22 is arranged on the blocking base 21 and matches the part of the oil passage 17 extending out of the blocking block, the blocking block 19 is in contact with the blocking base 21 under the action of the compression spring 20, at this time, the end of the oil passage 17 is tightly inserted into the circular groove 22, the lower open end face of the oil passage 17 is in contact with the groove bottom of the circular groove 22, an oil passage hole 23 is arranged at the lower end face of the shell 15, and an oil outlet hole 24 is arranged at the upper end face of the shell 15; when the pressure entering the fuel filter is too large when the automobile climbs or accelerates and the throttle needs to be increased, the fuel pressure will overcome the elastic force of the compression spring 20 to push the blocking block 19 to move upwards, so that the oil passage 17 is separated from the circular groove 22, thereby opening the pressure valve 10, the fuel passes through the pressure valve 10 and then returns through the return pipe, and the balance adjustment of the fuel pressure is realized.

[0032] The lower cover 8 and the upper cover cavity 7 are rigidly and sealingly connected through spin welding.

[0033] The first insertion ring 13 is inserted into the middle hole of the filter element 5, the second insertion ring 14 is inserted into the middle hole at the other end of the filter element 5, and the axial positioning of the filter element 5 is realized.

[0034] The blocking block 19 is in contact with the blocking base 21 under the action of the compression spring 20, and the end of the oil passage 17 is inserted into the circular groove 22 of the blocking base 21.

[0035] The outer shell 1 is formed by injection molding, the upper cover cavity 7 is communicated with the oil return pipe 4, the lower cover 8 seals the lower opening of the upper cover cavity 7 by using spin welding process, the welding strength is greater than or equal to 50 N·cm, the positioning ring 11 of the pressure valve 10 is clamped into the annular groove 9 through the sealing ring 12, the sealing ring 12 is made of butyronitrile rubber and has a compression rate of 20%, the filter element 5 is axially positioned through the first insertion ring 13 and the second insertion ring 14, and the radial gap is less than or equal to 0.1 mm, and the oil passage 17 of the pressure valve 10 is tightly matched with the circular groove 22 of the blocking base 21, so that the high-pressure fuel is ensured to have no leakage.

[0036] The above technical scheme can achieve the following technical effects:

[0037] 1. The spin welding structure replaces the elastic sealing, has strong anti-vibration ability and high sealing reliability;

[0038] 2. The annular groove precisely matches with the positioning ring, the pressure valve is accurately positioned, and leakage caused by deviation is avoided;

[0039] 3. The double-insert-ring structure stably fixes the filter element, prolonging the service life of the filter;

[0040] 4. The pressure valve responds sensitively, effectively maintains the stability of fuel pressure, and improves the power performance of the engine.

Claims

1. A gasoline filter having an upper cap fusion type full seal pressure valve, characterized in that, The utility model relates to a filter device, including: a shell (1) provided with an oil inlet pipe (2), an oil outlet pipe (3) and an oil return pipe (4), an annular filter element (5) and a pressure valve (10) arranged inside the shell (1); a positioning chamber (6) arranged in the shell (1) and used for fixing the filter element (5); an upper cover cavity (7) integrally formed with the shell (1) and communicated with the oil return pipe (4), and a lower opening of the upper cover cavity (7) is sealingly connected with a lower cover (8) through spin fusion welding; an annular groove (9) arranged between the upper cover cavity (7) and the lower cover (8), an outer periphery of the pressure valve (10) is provided with a positioning ring (11), and the positioning ring (11) is inserted into the annular groove (9) through a sealing ring (12); a first insertion ring (13) arranged at a lower end surface of the lower cover (8) and a second insertion ring (14) arranged at a bottom of the positioning chamber (6) and used for fixing the filter element (5); the pressure valve (10) includes a shell (15), an elastic diaphragm (16) arranged in the shell (15), an oil passage (17) arranged at a middle portion of the elastic diaphragm (16), a spring seat (18) welded at a position above the elastic diaphragm (16), a blocking block (19) welded at a position below the elastic diaphragm (16), a compression spring (20) arranged between the spring seat (18) and an upper end surface of an inner cavity of the shell (15), a blocking base (21) installed at a lower end of the inner cavity of the shell (15) and corresponding to the blocking block (19) in an up-down direction, a circular groove (22) arranged on the blocking base (21) and matched with a portion of the oil passage (17) extending out of the blocking block.

2. The gasoline filter according to claim 1, characterized by the lower cover (8) and the upper cover cavity (7) are rigidly and sealingly connected through spin fusion welding.

3. The gasoline filter according to claim 1, characterized by the first insertion ring (13) is inserted into a middle hole of the filter element (5), and the second insertion ring (14) is inserted into another middle hole of the filter element (5), so that axial positioning of the filter element (5) is realized.

4. The gasoline filter of claim 1 wherein, the blocking block (19) is in contact with the blocking base (21) under the action of the compression spring (20), and an end portion of the oil passage (17) is inserted into the circular groove (22) of the blocking base (21).

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