CN107461537B - Safe and reliable compressed natural gas pressure reducing regulator for automobiles - Google Patents

Abstract

The invention discloses a safe and reliable compressed natural gas pressure reducing regulator for an automobile, which comprises a main valve body and an electromagnetic valve body, wherein a positioning hole is formed in the center of a convex surface on one side of the main valve body, an undercut groove and a positioning spigot are formed in the orifice of the positioning hole, a water circulation flow passage close to a primary pressure reducing cavity and a secondary pressure reducing cavity is formed in the main valve body, the diameter and the volume of the secondary pressure reducing cavity are both larger than those of the positioning hole of the secondary pressure reducing valve port, and a waist-shaped flange surface and an air outlet interface which are connected into a whole are formed in the bottom of the electromagnetic valve body. According to the invention, the connection mode of the electromagnetic valve body and the main valve body is improved through design, so that the connection and sealing of the electromagnetic valve body and the main valve body are safer, and an air inlet joint can be omitted; the water circulation flow channel is reasonably designed in the main valve body, so that the heat conduction effect of the water circulation flow channel is better, and the compressed natural gas is ensured to be fully atomized; the diameter and the volume of the secondary decompression cavity are improved and increased, so that the compressed natural gas discharge is more stable.

Description

Safe and reliable compressed natural gas pressure reducing regulator for automobiles

Technical Field

The invention relates to the field of pressure reducing regulators, and more particularly to a safe and reliable compressed natural gas pressure reducing regulator for automobiles.

Background technique

In the existing compressed natural gas pressure reducing regulator for automobiles, the solenoid valve body and the water circulation flow channel are generally arranged on a raised surface on one side of the main valve body, and the solenoid valve body and the main valve body are connected in a manner that the bottom of the solenoid valve body is processed into a flat square with a through hole, an air intake joint is screwed on the raised surface of the main valve body, and the solenoid valve body is tightly fixed on the main valve body through a copper gasket flat hard seal. At the same time, due to the limitations of the structural design, the diameter and volume of the secondary pressure reducing chamber arranged inside the main valve body are often small, as shown in Figure 1. The above structure has certain technical defects: first, since high-pressure compressed natural gas comes out from the bottom of the solenoid valve body, the solenoid valve body and the main valve body are connected by a copper gasket plane hard seal, which has certain safety hazards. If the operation is not careful, the high-pressure compressed natural gas will leak out from the copper gasket plane, directly endangering human life and safety, with disastrous consequences; second, the water circulation flow channel is arranged on the raised surface on one side of the main valve body, and the heat conduction area is relatively small, and it is far away from the primary and secondary pressure relief chambers inside the main valve body, which greatly affects the heat conduction effect and makes the compressed natural gas unable to be fully atomized; third, since the diameter and volume of the secondary pressure relief chamber inside the main valve body are small, when the car throttle is pulled up, it is easy to cause the secondary pressure relief chamber to fail to keep up with the instantaneous exhaust and produce gas emission fluctuations, affecting the driving quality of the car.

Summary of the invention

In view of the above problems, the technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide a safe and reliable compressed natural gas pressure reducing regulator for automobiles, so that the connection and sealing between the solenoid valve body and the main valve body are safer, the discharge of compressed natural gas is more stable, the heat conduction effect of the water circulation flow channel is better, and the compressed natural gas is ensured to be fully atomized.

To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a safe and reliable compressed natural gas pressure reducing regulator for automobiles, comprising a main valve body and a solenoid valve body, wherein the solenoid valve body is arranged on a convex surface on one side of the main valve body, an electromagnetic coil is installed on the solenoid valve body, a lower end cover is arranged at the lower end of the main valve body, an upper end cover is arranged at the upper end of the main valve body, a vacuum joint is arranged at the upper end cover, a primary pressure reducing chamber and a secondary pressure reducing chamber are arranged inside the main valve body, a primary pressure reducing device is arranged between the primary pressure reducing chamber of the main valve body and the inner cavity of the lower end cover, a secondary pressure reducing device is arranged between the secondary pressure reducing chamber of the main valve body and the inner cavity of the upper end cover, a convex surface on one side of the main valve body is in a waist shape, a positioning hole is arranged at the center thereof to communicate with the primary pressure reducing chamber of the main valve body , internal threaded holes are provided on both sides of the positioning hole, countersunk grooves and positioning stoppers are provided at the orifice of the positioning hole, and O-rings are provided in the countersunk grooves and positioning stoppers. A valve body working chamber, an air inlet interface and a pressure gauge interface are provided on the upper part of the solenoid valve body, and a waist-shaped flange surface and an air outlet interface connected as one are provided at the bottom of the solenoid valve body. Fixed holes are provided at the two end corners of the waist-shaped flange surface, and a radial sealing block, an axial sealing block and 4 air outlet holes evenly distributed on the same cross-section are provided on the outer circle of the air outlet interface. The air outlet hole is connected to the inner cavity of the air outlet interface, and a first-level pressure reducing valve port is provided at the bottom of the inner cavity of the air outlet interface. The first-level pressure reducing valve port is connected to the working chamber of the valve body, and the inner cavity of the air outlet interface is equipped with a first-level pressure reducing valve core.

The present invention provides a positioning hole at the center of a raised surface on one side of the main valve body, which is connected to the primary decompression chamber of the main valve body; a countersunk groove and a positioning stop are provided at the opening of the positioning hole; and a waist-shaped flange surface and an air outlet interface which are connected as an integral whole are provided at the bottom of the solenoid valve body; a radial sealing block and an axial sealing block are provided on the outer circle of the air outlet interface, which can realize a double-layer O-ring soft seal, making the connection seal between the solenoid valve body and the main valve body safer and more reliable.

Furthermore, a water circulation channel is provided inside the main valve body, and the water circulation channel is arranged horizontally in a U shape close to the primary pressure relief chamber and the secondary pressure relief chamber of the main valve body, so as to improve the heat conduction effect of the water circulation channel and ensure that the compressed natural gas is fully atomized.

Furthermore, a secondary pressure relief valve port positioning hole is provided between the primary pressure relief chamber and the secondary pressure relief chamber in the main valve body, and the diameter and volume of the secondary pressure relief chamber are both larger than the diameter and volume of the secondary pressure relief valve port positioning hole. Improving and increasing the diameter and volume of the secondary pressure relief chamber can make the discharge of compressed natural gas more stable.

Furthermore, an air outlet joint, a safety valve, a water inlet joint and a water outlet joint are provided on the external front side of the main valve body, and a water temperature sensing joint is provided next to a raised surface on one side of the main valve body. The safety valve is screwed in communication with the first-level decompression chamber, the air outlet joint is screwed in communication with the second-level decompression chamber, the water inlet joint, the water outlet joint are screwed in communication with the water circulation channel, and the water temperature sensing joint is screwed in position with the water circulation channel.

Furthermore, the shape and size of the waist-shaped flange surface at the bottom of the solenoid valve body are consistent with the cross-sectional shape and size of the raised surface on one side of the main valve body, and the center distance between the two fixing holes on the waist-shaped flange surface is consistent with the center distance between the two internal threaded holes on the raised surface on one side of the main valve body.

The beneficial effects of the present invention are as follows: the present invention improves the connection mode between the electromagnetic valve body and the main valve body by design, so that the connection seal between the electromagnetic valve body and the main valve body is safer and the air intake joint can be omitted; the water circulation flow channel is reasonably designed inside the main valve body to achieve better heat conduction effect of the water circulation flow channel, thereby ensuring full atomization of compressed natural gas; and the discharge of compressed natural gas is more stable by improving and increasing the diameter and volume of the secondary decompression chamber.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the prior art.

FIG. 2 is a cross-sectional view of the structure of the present invention.

FIG. 3 is a right side view of FIG. 2 .

FIG. 4 is a left side view of FIG. 3 .

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 4 .

FIG. 6 is a structural cross-sectional view of the main valve body in the present invention.

FIG. 7 is a right side view of FIG. 6 .

FIG. 8 is a schematic structural diagram of the solenoid valve body of the present invention.

FIG9 is a cross-sectional view taken along line K-K in FIG8.

In the figure, 1-main valve body, 2-lower end cover, 3-first-stage pressure reducing chamber, 4-first-stage pressure reducing device, 5-first-stage pressure reducing valve core, 6-electromagnetic valve body, 7-electromagnetic coil, 8-second-stage pressure reducing chamber, 9-upper end cover, 10-second-stage pressure reducing device, 11-water circulation channel, 12-vacuum extraction joint, 13-air outlet joint, 14-water inlet joint, 15-safety valve, 16-hexagon socket screw, 17-water temperature sensing joint, 18-water outlet joint, 19-positioning hole, 20-sunk groove, 21-positioning stop, 22-second-stage pressure reducing valve port positioning hole, 23-internal threaded hole, 24-waist-shaped flange surface, 25-air inlet interface, 26-pressure gauge interface, 27-first-stage pressure reducing valve port, 28-air outlet interface, 29-air outlet hole, 30-radial sealing block, 31-axial sealing block, 32-valve body working chamber, 33-fixing hole.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

As shown in FIGS. 2 to 9, the safe and reliable compressed natural gas pressure reducing regulator for automobiles of the present invention comprises a main valve body 1 and a solenoid valve body 6, wherein the solenoid valve body 6 is arranged on a convex surface on one side of the main valve body 1, and an electromagnetic coil 7 is mounted on the solenoid valve body 6, a lower end cover 2 is arranged at the lower end of the main valve body 1, an upper end cover 9 is arranged at the upper end of the main valve body 1, and a vacuum joint 12 is arranged at the upper end cover 9, and a primary pressure reducing chamber 3 and a secondary pressure reducing chamber 8 are arranged inside the main valve body 1, and the primary pressure reducing chamber 3 of the main valve body 1 and the inner cavity of the lower end cover 2 are connected to each other. A primary pressure reducing device 4 is provided between the secondary pressure reducing chamber 8 of the main valve body 1 and the inner cavity of the upper end cover 9. A secondary pressure reducing device 10 is provided between the secondary pressure reducing chamber 8 of the main valve body 1 and the inner cavity of the upper end cover 9. In order to make the connection and sealing between the electromagnetic valve body 6 and the main valve body 1 safer, a convex surface on one side of the main valve body 1 is waist-shaped, and a positioning hole 19 is provided in the center thereof to communicate with the primary pressure reducing chamber 3 of the main valve body 1. Internal threaded holes 23 are provided on both sides of the positioning hole 19. A countersunk groove 20 and a positioning stop 21 are provided at the orifice of the positioning hole 19. O-ring seals are provided in the countersunk groove 20 and the positioning stop 21. The solenoid valve body 6 is provided with a valve body working chamber 32, an air inlet interface 25 and a pressure gauge interface 26 at the upper part, and a waist-shaped flange surface 24 and an air outlet interface 28 are provided at the bottom of the solenoid valve body 6. The two end corners of the waist-shaped flange surface 24 are provided with fixing holes 33. The outer circle of the air outlet interface 28 is provided with a radial sealing block 30, an axial sealing block 31 and 4 air outlet holes 29 evenly distributed on the same cross-section. The air outlet holes 29 are connected to the inner cavity of the air outlet interface 28. The bottom of the inner cavity of the air outlet interface 28 is provided with a first-stage reduction The first-stage pressure reducing valve port 27 is connected to the valve body working chamber 32, the inner cavity of the air outlet interface 28 is equipped with a first-stage pressure reducing valve core 5, the shape and size of the waist-shaped flange surface 24 at the bottom of the solenoid valve body 6 are consistent with the cross-sectional shape and size of the raised surface on one side of the main valve body 1, the center distance between the two fixing holes 33 on the waist-shaped flange surface 24 is consistent with the center distance between the two internal threaded holes 23 on the raised surface on one side of the main valve body 1, and the solenoid valve body 6 is tightly fixed on the raised surface on one side of the main valve body 1 by the hexagon socket screw 16. In order to make the heat conduction effect of the water circulation channel better and ensure that the compressed natural gas is fully atomized, a water circulation channel 11 is also provided inside the main valve body 1. The water circulation channel 11 is horizontally arranged in a U shape close to the first-level decompression chamber 3 and the second-level decompression chamber 8 of the main valve body 1. The external front of the main valve body 1 is provided with an air outlet joint 13, a safety valve 15, a water inlet joint 14 and a water outlet joint 18. A water temperature sensing joint 17 is provided next to the raised surface on one side of the main valve body 1. The safety valve 15 is screwed and connected to the first-level decompression chamber 3, the air outlet joint 13 is screwed and connected to the second-level decompression chamber 8, the water inlet joint 14 and the water outlet joint 18 are screwed and connected to the water circulation channel 11, and the water temperature sensing joint 17 is screwed and positioned with the water circulation channel 11. In order to improve and increase the volume of the secondary pressure reducing chamber and make the compressed natural gas discharge more stable, a secondary pressure reducing valve port positioning hole 22 is provided between the primary pressure reducing chamber 3 and the secondary pressure reducing chamber 8 inside the main valve body 1. Through deep processing, the diameter and volume of the secondary pressure reducing chamber 8 are both larger than the diameter and volume of the secondary pressure reducing valve port positioning hole 22.

Claims (3)

1. The utility model provides a safe and reliable's compressed natural gas pressure reducing regulator for car, includes main valve body (1) and solenoid valve body (6), solenoid valve body (6) establish the one side bulge face at main valve body (1), be equipped with solenoid (7) on solenoid valve body (6), the lower extreme of main valve body (1) is equipped with lower end cover (2), and the upper end of main valve body (1) is equipped with upper end cover (9), upper end cover (9) are equipped with evacuation joint (12), the inside of main valve body (1) is equipped with one-level decompression chamber (3) and second grade decompression chamber (8), be equipped with one-level decompression device (4) between one-level decompression chamber (3) and lower end cover (2) inner chamber of main valve body (1), be equipped with second grade decompression device (10) between second grade decompression chamber (8) and upper end cover (9) inner chamber of main valve body (1), its characterized in that, one side bulge face of main valve body (1) is the waist shape, and the central part is equipped with locating hole (19) and main valve body's one-level decompression chamber (3) are linked together, locating hole (19) is equipped with countersunk hole (19) and locating slot (21) and locating slot (20) are equipped with in the same place, sealing washer (21) and locating slot (20), the electromagnetic valve body (6) upper portion is equipped with valve body working chamber (32), inlet port (25) and manometer interface (26), and electromagnetic valve body (6) bottom is equipped with waist shape flange face (24) and the interface (28) of giving vent to anger as an organic whole, the both ends angle of waist shape flange face (24) is equipped with fixed orifices (33), be equipped with radial seal baffle (30), axial seal baffle (31) and 4 ventholes (29) of establishing at same cross-section circumference equipartition on the excircle of interface (28) of giving vent to anger, venthole (29) are linked together with interface (28) inner chamber of giving vent to anger, interface (28) inner chamber bottom is equipped with one-level decompression valve port (27), one-level decompression valve port (27) are linked together with valve body working chamber (32), the inner chamber of interface (28) of giving vent to anger is equipped with one-level decompression valve core (5), the inside of main valve body (1) still is equipped with water circulation runner (11), one-level decompression chamber (3) and second-level decompression chamber (8) of main valve body (1) are U-shaped level setting, one-level decompression chamber (3) and second-level decompression chamber (8) are equipped with one-level decompression chamber (7) and two-level decompression chamber (7), the diameter and the volume of the secondary pressure reducing cavity (8) are larger than those of the secondary pressure reducing valve port positioning hole (22).

2. The safe and reliable compressed natural gas pressure reducing regulator for the automobile according to claim 1, wherein an air outlet joint (13), a safety valve (15), a water inlet joint (14) and a water outlet joint (18) are arranged on the outer front surface of the main valve body (1), a water temperature sensing joint (17) is further arranged beside a convex surface on one side of the main valve body (1), the safety valve (15) is in threaded connection with the primary pressure reducing cavity (3), the air outlet joint (13) is in threaded connection with the secondary pressure reducing cavity (8), the water inlet joint (14) and the water outlet joint (18) are in threaded connection with the water circulation flow channel (11), and the water temperature sensing joint (17) is in threaded connection with the water circulation flow channel (11).

3. The safe and reliable compressed natural gas pressure reducing regulator for automobiles according to claim 1, wherein the shape and the size of a waist-shaped flange surface (24) at the bottom of the electromagnetic valve body (6) are consistent with the shape and the size of a cross section of a convex surface at one side of the main valve body (1), and the center distance of two fixing holes (33) on the waist-shaped flange surface (24) is consistent with the center distance of two internal threaded holes (23) on the convex surface at one side of the main valve body (1).