Fuel gas conversion filter joint

Abstract

The utility model discloses a fuel gas conversion filtering connector, and belongs to the technical field of automobiles. The defect that in some areas with poor natural gas quality, the filtering function of a gas filter is seriously reduced before a replacement period is reached in the prior art is overcome. The device mainly comprises a shell, a front connector and a rear connector are arranged at the front end and the rear end of the shell respectively, an air inlet blind hole is formed in the front end face of the front connector, an air inlet hole communicated with the air inlet blind hole is formed in the circumferential face of the rear connector, and annular rear sealing grooves are formed in the positions, on the two sides of the air inlet hole, of the circumferential face of the rear connector respectively. The rear sealing groove is sleeved with a rear sealing ring, and a filter screen is installed in the air inlet blind hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a gas conversion filter joint. Background Art

[0002] China is a vast country with different natural gas quality in CNG filling stations in different regions. There are some differences in the impurity content of natural gas of different qualities. When the engine is working, natural gas impurities will have adverse effects on the gas pressure reducing valve and gas injection rail, causing the engine to not work properly. At present, in order to deal with impurities in natural gas, a high-pressure gas filter is often installed between the gas cylinder and the gas pressure reducing valve, and a low-pressure gas filter is installed between the gas pressure reducing valve and the gas injection rail. The replacement cycle of the gas filter on the gas line of a CNG vehicle of a manufacturer is often the same, but the sales area of ​​the vehicle is often more, and the quality of natural gas in different areas will be different. This causes the filtering function of the gas filter to be seriously reduced before the replacement cycle of the gas filter is reached in areas with poor natural gas quality, which can easily cause the gas injection rail to be blocked, affecting the normal operation of the engine. In addition, since automobile manufacturers cannot know the quality of natural gas in the driver's area, the failure rate of vehicle gas parts in areas with poor natural gas quality is higher. Summary of the invention

[0003] The utility model aims to provide a gas conversion filter joint to overcome the defect in the prior art that the filtering function of the gas filter in some areas with poor natural gas quality has been seriously reduced before the replacement cycle is reached.

[0004] The utility model is realized by adopting the following technical scheme: a gas conversion filter joint comprises a shell, wherein the front end and the rear end of the shell are respectively provided with a front connector and a rear connector, an air inlet blind hole is provided on the front end surface of the front connector, an air inlet hole connected to the air inlet blind hole is provided on the circumferential surface of the rear connector, annular rear sealing grooves are respectively provided on the circumferential surface of the rear connector on both sides of the air inlet hole, a rear sealing ring is mounted on the rear sealing groove, and a filter screen is installed in the air inlet blind hole.

[0005] Furthermore, a ring-shaped clamping groove is provided at the rear end of the front connector, a ring-shaped front sealing groove is provided at the front end of the air intake blind hole, and a front sealing ring is installed in the front sealing groove.

[0006] Furthermore, the front sealing ring is a rubber sealing ring.

[0007] Furthermore, a limiting step is provided in the air inlet blind hole, and the filter is installed on the limiting step.

[0008] Furthermore, the air intake blind hole is provided with an internal thread on the rear side of the front sealing groove and a clamping cylinder is threadedly installed, the clamping cylinder is provided with an external thread that matches the internal thread of the air intake blind hole, a base is installed at the rear end of the clamping cylinder, an air vent is provided on the base, and the front end of the inner hole of the clamping cylinder is a hexagonal hole.

[0009] Furthermore, an annular air inlet groove is provided on the circumferential surface of the rear connector, the air inlet hole is provided in the air inlet groove, and the rear connector is provided with a plurality of air inlet holes at intervals along the air inlet groove.

[0010] Furthermore, the rear end of the rear connecting head is provided with an external thread, and the rear end of the rear connecting head is threadedly connected to a nut.

[0011] Furthermore, the circumferential surface of the rear connector is provided with two rear sealing grooves on both sides of the air inlet, and a rear sealing ring is sleeved in each rear sealing groove.

[0012] Furthermore, the rear sealing ring is a rubber sealing ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model can effectively filter the natural gas added to the charging valve by installing a filter in the air intake blind hole, thereby achieving the purpose of improving the quality of natural gas, thereby increasing the service life of the gas filter on the gas path of the CNG vehicle, and well solving the problem that the filtering function of the gas filter has been seriously reduced before the replacement cycle is reached due to the poor quality of natural gas in some areas.

[0015] 2. The utility model can fix the filter in the air intake blind hole by setting a compression cylinder. At the same time, since the compression cylinder is threadedly connected to the air intake blind hole, when the filter needs to be replaced or the use of the filter needs to be checked, it is only necessary to unscrew the compression cylinder from the air intake blind hole, which is very convenient and reduces the use cost of the utility model. When the filtering effect of the filter is reduced, it is only necessary to replace the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the utility model when viewed in section;

[0019] Figure 4 It is a three-dimensional diagram of the compression cylinder 11 of the present invention.

[0020] In the figure: 1. Shell; 2. Front connector; 3. Rear connector; 4. Air inlet blind hole; 5. Air inlet hole; 6. Rear sealing ring; 7. Filter; 8. Slot; 9. Front sealing ring; 10. Limiting step; 11. Clamping cylinder; 12. Base; 13. Hexagon socket hole; 14. Air inlet groove; 15. Nut. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] A gas conversion filter joint comprises a shell 1, wherein the front end and the rear end of the shell 1 are respectively provided with a front connector 2 and a rear connector 3, wherein the front connector 2 is used to be connected to a gas filling gun of a gas filling station during gas filling, and the rear connector 3 is used to be connected to an inflation valve during gas filling, and the rear connector 3 of the shell 1 can be inserted into the inflation port of the inflation valve.

[0023] The front connector 2 of the utility model is provided with a detachable dust cap, which can prevent dust from entering the air inlet blind hole 4 when the utility model is not in use.

[0024] The front end face of the front connector 2 is provided with an air intake blind hole 4, the circumferential surface of the rear connector 3 is provided with an air intake hole 5 connected to the air intake blind hole 4, the circumferential surface of the rear connector 3 is provided with an annular air intake groove 14, the air intake hole 5 is provided in the air intake groove 14, and the rear connector 3 is provided with multiple air intake holes 5 at intervals along the air intake groove 14, and the air intake holes 5 are connected to the air intake blind hole 4.

[0025] The circumferential surface of the rear connecting head 3 is respectively provided with annular rear sealing grooves on both sides of the air inlet hole 5, and a rear sealing ring 6 is installed on the rear sealing groove. The circumferential surface of the rear connecting head 3 is respectively provided with two rear sealing grooves on both sides of the air inlet hole 5, and a rear sealing ring 6 is installed in each rear sealing groove. The rear sealing ring 6 is a rubber sealing ring. The rear sealing ring 6 can prevent the natural gas from leaking from the contact surface between the rear connecting head 3 and the inflation valve when the rear connecting head 3 is connected to the inflation valve and inflated.

[0026] The filter screen 7 is installed in the air intake blind hole 4. The utility model can filter the natural gas entering the charging valve from the gas filling gun by installing the filter screen 7 in the air intake blind hole 4, thereby improving the quality of natural gas, thereby increasing the service life of the gas filter on the gas path of the CNG vehicle, and well solving the problem that the filtering function of the gas filter has been seriously reduced before the replacement cycle is reached due to the poor quality of natural gas in some areas. In addition, the utility model has a low use cost. When the filtering effect of the utility model deteriorates, people only need to replace the filter screen 7 in the air intake blind hole 4.

[0027] The rear end of the front connector 2 is provided with an annular slot 8, which can be used to connect the front connector 2 with the gas filling gun when used. The front end of the air intake blind hole 4 is provided with an annular front sealing groove, in which a front sealing ring 9 is installed. The front sealing ring 9 can prevent natural gas from leaking from the air intake blind hole 4 when the front connector 2 is connected to the gas filling gun.

[0028] The air intake blind hole 4 is provided with a limiting step 10, and the filter screen 7 is installed on the limiting step 10. By providing the limiting step 10, the air intake blind hole 4 becomes a stepped hole.

[0029] The air intake blind hole 4 is provided with an internal thread at the rear side of the front sealing groove and a compression cylinder 11 is threadedly installed. The compression cylinder 11 is provided with an external thread that matches the internal thread of the air intake blind hole 4. The rear end of the compression cylinder 11 is provided with a base 12, and an air vent is provided on the base 12. The front end of the inner hole of the compression cylinder 11 is a hexagonal hole 13. The compression cylinder 11 of the utility model is used to compress the filter screen 7 in the air intake blind hole 4. The compression cylinder 11 is threadedly installed in the air intake blind hole 4. When installing and disassembling, it is only necessary to insert the hexagonal wrench into the hexagonal hole 13. By rotating the hexagonal wrench to rotate the compression cylinder 11, the purpose of the compression cylinder 11 compressing the filter screen 7 or unscrewing the compression cylinder 11 is achieved. The base 12 is provided with an air vent to facilitate the natural gas to pass through the base 12.

[0030] The rear end of the rear connector 3 is provided with an external thread, and the rear end of the rear connector 3 is threadedly connected to a nut 15. The utility model is convenient for fixing the utility model to the inflation valve by threading the nut 15 at the rear end of the rear connector 3. The outer diameter of the rear connector 3 is smaller than the outer diameter of the housing 1, and the outer diameter of the housing 1 is larger than the inner diameter of the inflation port of the inflation valve. When the rear connector 3 is inserted into the inflation port of the inflation valve, the nut 15 is tightened on the rear end of the rear connector 3, thereby firmly fixing the utility model on the inflation valve. A gasket can be installed between the nut 15 and the inflation valve.

Claims

1. A gas conversion filter joint, characterized in that: The invention comprises a shell (1), wherein a front connector (2) and a rear connector (3) are respectively provided at the front and rear ends of the shell (1), an air inlet blind hole (4) is provided at the front end surface of the front connector (2), an air inlet hole (5) connected to the air inlet blind hole (4) is provided on the circumferential surface of the rear connector (3), an annular rear sealing groove is respectively provided on both sides of the air inlet hole (5) on the circumferential surface of the rear connector (3), a rear sealing ring (6) is mounted on the rear sealing groove, and a filter screen (7) is installed in the air inlet blind hole (4).

2. The gas conversion filter joint according to claim 1, characterized in that: The rear end of the front connector (2) is provided with an annular clamping groove (8), the front end of the air inlet blind hole (4) is provided with an annular front sealing groove, and a front sealing ring (9) is installed in the front sealing groove.

3. The gas conversion filter joint according to claim 2, characterized in that: The front sealing ring (9) is a rubber sealing ring.

4. The gas conversion filter joint according to claim 2, characterized in that: A limiting step (10) is provided in the air inlet blind hole (4), and the filter screen (7) is mounted on the limiting step (10).

5. The gas conversion filter joint according to claim 2, characterized in that: The air intake blind hole (4) is provided with an internal thread at the rear side of the front sealing groove and a clamping cylinder (11) is threadedly installed thereon. The clamping cylinder (11) is provided with an external thread that matches the internal thread of the air intake blind hole (4). A base (12) is installed at the rear end of the clamping cylinder (11). An air vent is provided on the base (12). The front end of the inner hole of the clamping cylinder (11) is a hexagonal hole (13).

6. The gas conversion filter joint according to claim 1, characterized in that: An annular air inlet groove (14) is provided on the circumferential surface of the rear connecting head (3), the air inlet hole (5) is provided in the air inlet groove (14), and the rear connecting head (3) is provided with a plurality of air inlet holes (5) at intervals along the air inlet groove (14).

7. The gas conversion filter joint according to claim 1, characterized in that: The rear end of the rear connecting head (3) is provided with an external thread, and the rear end of the rear connecting head (3) is threadedly connected to a nut (15).

8. The gas conversion filter joint according to claim 1, characterized in that: The circumferential surface of the rear connector (3) is provided with two rear sealing grooves on both sides of the air inlet hole (5), and a rear sealing ring (6) is installed in each rear sealing groove.

9. The gas conversion filter joint according to claim 1, characterized in that: The rear sealing ring (6) is a rubber sealing ring.

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