CN2913643Y - High-pressure reducing regulator for compressed natural gas - Google Patents

Abstract

The utility model relates to a compressed natural gas pressure regulator which comprises an entrance adapter, a cone valve, a valve seat, a base seat, an upper cover, a spring, a spring seat, a pressure-regulating screw, a cone valve cap, a diaphragm seat, a diaphragm seat cover, a rubber diaphragm, a metal diaphragm, and a round support plate. The entrance adapter is threadedly connected with the base seat which is further threadedly connected with the upper cover. The outer margins of the rubber diaphragm and the metal diaphragm are sandwiched between the base seat and the upper cover. The cone valve is threadedly connected with the cone valve cap. The diaphragm seat is covered around the cone valve cap, defining a space therebetween. The diaphragm seat cover is threadedly arranged on the diaphragm seat. A drum-shaped damping piece is covered around the diaphragm seat cover inside the upper cover and arranged on the support plate, and the outer wall of the damping piece contacts with the inner wall of the upper cover. Two ends of the spring are butted against the top surface of the damping piece and the bottom surface of the spring seat respectively. The pressure-regulating screw is threadedly arranged on the upper cover and butted against the top of the spring seat. The utility model has the advantages of no vibration during operation, improved performance and long service life.

Description

Compressed natural gas high pressure relief regulator

Technical field

The utility model relates to a kind of gas automotive fuel supply system parts, refers to a kind of compressed natural gas high pressure relief regulator especially.

Background technique

Utilizing rock gas to replace oil to act as a fuel, is the desirable feasible method of improving energy resource structure, reducing pollution and save cost.Compressed natural gas high pressure relief regulator is the vitals of natural gas vehicle fuel supply system, and its effect is that the high-pressure natural gas that will store on the automobile is decompressed to low-pressure gas, is directly used in automobile burning or uses for further decompression.Present existing rock gas pressure reducing regulator, have plenty of high, medium and low three grades of structures that decompression group is integrated of employing, the shortcoming of this structure is to be not easy to maintenance and replacing, and wherein the damage of one-level pressure reducing regulator all must be changed three grades of pressure reducing regulators together arbitrarily, the expense height, waste is big.

Though the compressed natural gas high pressure relief regulator that has also adopts non-composite structure, adopt the compressed natural gas high pressure relief regulator of non-composite structure to comprise: inlet attack, cone valve, valve seat, base, loam cake, spring, spring seat, pressure regulating screw, cone valve cap, diaphragm seat, film seat cover, elastomer diaphragm, metal diaphragm and circle supporting plate; Inlet attack and base bolt, the cavity that inlet attack, cone valve and valve seat form constitutes hyperbaric chamber; Elastomer diaphragm, metal diaphragm and circle supporting plate stack from bottom to top successively, base and loam cake bolt, and the outer rim of elastomer diaphragm and metal diaphragm is located between base and the loam cake, and the cavity that base and elastomer diaphragm form constitutes low-pressure cavity; Cone valve and cone valve cap bolt, the diaphragm cover for seat is located on the cone valve cap, and film seat cover is screwed onto on the diaphragm seat, and film seat cover is encapsulated in the cone valve cap in the diaphragm seat, and film seat cover and diaphragm seat are fixedlyed connected elastomer diaphragm, metal diaphragm and circle supporting plate and are integral; The two ends of spring head on the bottom surface of the end face and the spring seat of round supporting plate respectively, and pressure regulating screw is screwed onto and covers, and pressure regulating screw withstands on the top of spring seat; Base along the circumferential direction is provided with first projection 31, second projection 32, the 3rd projection 33, the 4th projection the 34 and the 5th projection 35 (as shown in Figure 3) successively; First projection 31 of base is provided with water intake, second projection 32 is provided with water outlet, the 3rd projection 33 is provided with low pressure gas outlet 38, is provided with the water intake that is communicated with on first projection and passage 36, the five projectioies 35 of the water outlet on second projection in the base side wall and is provided with relief valve connection 37.There are shortcoming and defect such as thermal cycle is poor, easily vibration, delivery pressure poor stability in this compressed natural gas high pressure relief regulator.

Summary of the invention

Friction when the purpose of this utility model provides a kind of work has improved the compressed natural gas high pressure relief regulator in product performance and working life.

For achieving the above object, the utility model is taked following design proposal: a kind of compressed natural gas high pressure relief regulator, and it comprises: inlet attack, cone valve, valve seat, base, loam cake, spring, spring seat, pressure regulating screw, cone valve cap, diaphragm seat, film seat cover, elastomer diaphragm, metal diaphragm and circle supporting plate; Inlet attack and base bolt, the cavity that inlet attack, cone valve and valve seat form constitutes hyperbaric chamber; Elastomer diaphragm, metal diaphragm and circle supporting plate stack from bottom to top successively, base and loam cake bolt, and the outer rim of elastomer diaphragm and metal diaphragm is located between base and the loam cake, and the cavity that base and elastomer diaphragm form constitutes low-pressure cavity; Cone valve and cone valve cap bolt, the diaphragm cover for seat is located on the cone valve cap, and is gapped between cone valve cap and the diaphragm seat, and film seat cover is screwed onto on the diaphragm seat, film seat cover is encapsulated in the cone valve cap in the diaphragm seat, and film seat cover and diaphragm seat are fixedlyed connected elastomer diaphragm, metal diaphragm and circle supporting plate and be integral; Base along the circumferential direction is provided with first projection, second projection, the 3rd projection, the 4th projection and the 5th projection successively;

It is characterized in that, be provided with the drum shape vibration-damping sheet that is sheathed on the film seat cover in the loam cake, vibration-damping sheet places on the supporting plate, the outer wall of vibration-damping sheet contacts with the inwall of loam cake, the two ends of spring head on the bottom surface of the end face and the spring seat of vibration-damping sheet respectively, pressure regulating screw is screwed onto and covers, and pressure regulating screw withstands on the top of spring seat.

Spring is that cross section is the oval or round deformed spring that lacks shape of square or rectangular.

First projection of base is provided with water intake, second projection is provided with tapped hole, be bolted with screw plug on second projection, the 3rd projection is provided with water outlet, be provided with the passage of the water intake that is communicated with on first projection and the tapped hole on second projection in the base side wall and be communicated with tapped hole on second projection and the passage of the water outlet on the 3rd projection, the 4th projection is provided with the low pressure gas outlet, and the 5th projection is provided with relief valve connection.

The utility model has the advantages that:

1, the utility model compressed natural gas high pressure relief regulator, wherein be provided with the drum shape vibration-damping sheet that is sheathed on the film seat cover in the loam cake, vibration-damping sheet places on the supporting plate, the outer wall of vibration-damping sheet contacts with the inwall of loam cake, the two ends of spring head on the bottom surface of the end face and the spring seat of vibration-damping sheet respectively, pressure regulating screw is screwed onto and covers, and pressure regulating screw withstands on the top of spring seat.Vibration-damping sheet is the absorbing element, vibration-damping sheet and loam cake friction during elastomer diaphragm work, play the effect of absorbing, and it is gapped between cone valve cap and the diaphragm seat, cone valve can slide and swing, realize self-aligning, the vibration when having avoided the work of high pressure relief regulator has improved product performance and working life.

2, the utility model compressed natural gas high pressure relief regulator, its medi-spring is that cross section is the oval or round deformed spring that lacks shape of square or rectangular, the spring better performances, make the delivery pressure of high pressure relief regulator more stable, make the work of gas combustion automobile motor more stable, can reduce energy consumption, improve comfort level.

3, the utility model compressed natural gas high pressure relief regulator, wherein first projection of base is provided with water intake, second projection is provided with tapped hole, be bolted with screw plug on second projection, the 3rd projection is provided with water outlet, be provided with the passage of the water intake that is communicated with on first projection and the tapped hole on second projection in the base side wall and be communicated with tapped hole on second projection and the passage of the water outlet on the 3rd projection, the 4th projection is provided with the low pressure gas outlet, and the 5th projection is provided with relief valve connection.This shows,, increased the circulation heating water channel length between water intake and the water outlet with respect to base of the prior art, improved heats, avoid surperficial frosting and system ice stifled, because the part corrosion is quickened in surperficial frosting meeting, the stifled normal use that can directly influence motor of system's ice.

Description of drawings

Fig. 1 is the structure principle chart of compressed natural gas pressure reducing regulator

Fig. 2 is the A-A cross-sectional schematic among Fig. 1

Fig. 3 is the base cross-sectional schematic of present prior art

Embodiment

As shown in Figure 1 and Figure 2, the utility model compressed natural gas high pressure relief regulator, it comprises: inlet attack 1, cone valve 2, valve seat 4, base 3, loam cake 8, spring 7, spring seat 15, pressure regulating screw 9, cone valve cap 10, diaphragm seat 11, film seat cover 12, elastomer diaphragm 5, metal diaphragm 14 and circle supporting plate 13; Inlet attack 1 and base 3 bolts, the cavity that inlet attack 1, cone valve 2 and valve seat 4 form constitutes hyperbaric chamber a1, and hyperbaric chamber a1 is connected with the high-pressure natural gas that automobile stores; Elastomer diaphragm 5, metal diaphragm 14 and circle supporting plate 13 stack from bottom to top successively, base 3 and loam cake 8 bolts, the outer rim of elastomer diaphragm 5 and metal diaphragm 14 is located between base 3 and the loam cake 8, the cavity that base 3 and elastomer diaphragm 5 form constitutes low-pressure cavity a2, and low-pressure cavity a2 is connected on the decompressor of motor car engine or further decompression by the outlet of the low pressure gas on the base 3 24; Cone valve 2 and cone valve cap 10 bolts, diaphragm seat 11 is sheathed on the cone valve cap 10, gapped between cone valve cap 10 and the diaphragm seat 11, film seat cover 12 is screwed onto on the diaphragm seat 11, film seat cover 12 is encapsulated in cone valve cap 10 in the diaphragm seat 11, and film seat cover 12 and diaphragm seat 11 are fixedlyed connected elastomer diaphragm 5, metal diaphragm 14 and circle supporting plate 13 and be integral; Base 3 along the circumferential direction is provided with first projection 16, second projection 17, the 3rd projection 18, the 4th projection the 19 and the 5th projection 20 successively;

It is characterized in that, be provided with the drum shape vibration-damping sheet 6 that is sheathed on the film seat cover 12 in the loam cake 8, vibration-damping sheet 6 places on the supporting plate 13, the outer wall of vibration-damping sheet 6 contacts with the inwall of loam cake 8, the two ends of spring 7 head on the bottom surface of the end face and the spring seat 15 of vibration-damping sheet 6 respectively, pressure regulating screw 9 is screwed onto on the loam cake 8, and pressure regulating screw 9 withstands on the top of spring seat 15, adjusts the gas pressure that pressure regulating screw 9 can be adjusted the low pressure gas outlet 24 of high pressure relief regulator.

Spring 7 is the oval or round deformed spring that lacks shape of square or rectangular for cross section.

First projection 16 of base 3 is provided with water intake, second projection 17 is provided with tapped hole, be bolted with screw plug 21 on second projection 17, the 3rd projection 18 is provided with water outlet, be provided with the passage 22 of the water intake that is communicated with on first projection 16 and the tapped hole on second projection 17 in base 3 sidewalls and be communicated with tapped hole on second projection 17 and the passage 23 of the water outlet on the 3rd projection 18, the 4th projection 19 is provided with low pressure gas outlet 24, the five projectioies 20 and is provided with relief valve connection 25.

During pressure reducing regulator work, pressurized gas enter hyperbaric chamber a1 from inlet attack 1, after the decompression of the slit between cone valve 2 and the valve seat 4, make progress, lower plane level along diaphragm seat 11 enters low-pressure cavity a2, and when gas pressure in the low-pressure cavity a2 increased, diaphragm moved upward, slit between cone valve 2 and the valve seat 4 reduces, flow velocity increases, and pressure drop increases, and the interior gas pressure of low-pressure cavity a2 is reduced; When gas pressure in the low-pressure cavity a2 descended, diaphragm moved downward, and the slit between cone valve 2 and the valve seat 4 increases, and flow velocity reduces, and pressure drop reduces, and made gas pressure increase in the low-pressure cavity a2.Therefore gas pressure remains the constant voltage of being set up by pressure regulating screw 9 in the low-pressure cavity a2.

Claims (3)

1, a kind of compressed natural gas high pressure relief regulator, it comprises: inlet attack (1), cone valve (2), valve seat (4), base (3), loam cake (8), spring (7), spring seat (15), pressure regulating screw (9), cone valve cap (10), diaphragm seat (11), film seat cover (12), elastomer diaphragm (5), metal diaphragm (14) and circle supporting plate (13); Inlet attack (1) and base (3) bolt, the cavity that inlet attack (1), cone valve (2) and valve seat (4) form constitutes hyperbaric chamber (a1); Elastomer diaphragm (5), metal diaphragm (14) and circle supporting plate (13) stack from bottom to top successively, base (3) and loam cake (8) bolt, the outer rim of elastomer diaphragm (5) and metal diaphragm (14) is located between base (3) and the loam cake (8), and the cavity that base (3) and elastomer diaphragm (5) form constitutes low-pressure cavity (a2); Cone valve (2) and cone valve cap (10) bolt, diaphragm seat (11) is sheathed on the cone valve cap (10), gapped between cone valve cap (10) and the diaphragm seat (11), film seat cover (12) is screwed onto on the diaphragm seat (11), film seat cover (12) is encapsulated in cone valve cap (10) in the diaphragm seat (11), and film seat cover (12) and diaphragm seat (11) are fixedlyed connected elastomer diaphragm (5), metal diaphragm (14) and circle supporting plate (13) and be integral; Base (3) along the circumferential direction is provided with first projection (16), second projection (17), the 3rd projection (18), the 4th projection (19) and the 5th projection (20) successively;

It is characterized in that, be provided with the drum shape vibration-damping sheet (6) that is sheathed on the film seat cover (12) in the loam cake (8), vibration-damping sheet (6) places on the supporting plate (13), the outer wall of vibration-damping sheet (6) contacts with the inwall of loam cake (8), the two ends of spring (7) head on the bottom surface of the end face and the spring seat (15) of vibration-damping sheet (6) respectively, pressure regulating screw (9) is screwed onto on the loam cake (8), and pressure regulating screw (9) withstands on the top of spring seat (15).

2, compressed natural gas high pressure relief regulator according to claim 1 is characterized in that, spring (7) is the oval or round deformed spring that lacks shape of square or rectangular for cross section.

3, compressed natural gas high pressure relief regulator according to claim 1 and 2, it is characterized in that, first projection (16) of base (3) is provided with water intake, second projection (17) is provided with tapped hole, be bolted with screw plug (21) on second projection (17), the 3rd projection (18) is provided with water outlet, be provided with the passage (22) of the water intake that is communicated with on first projection (16) and the tapped hole on second projection (17) in base (3) sidewall and be communicated with tapped hole on second projection (17) and the passage (23) of the water outlet on the 3rd projection (18), the 4th projection (19) is provided with low pressure gas outlet (24), and the 5th projection (20) is provided with relief valve connection (25).

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