Secondary pressure regulating gas self-closing valve

Abstract

The utility model discloses a two-stage pressure regulating fuel gas self-closing valve which comprises a valve body, a gas inlet pipe is arranged on one side of the valve body, a first-stage pressure reducing mechanism is arranged on one side of the gas inlet pipe, a gas outlet pipe is arranged at the bottom of the valve body, an exhaust mechanism is arranged on one side of the first-stage pressure reducing mechanism, and a second-stage pressure reducing mechanism is arranged on the top of the exhaust mechanism. A top cover is arranged at the top of the valve body, a pressure release valve is installed on the top cover, a reset button is arranged on one side of the valve body, and the first-stage pressure reduction mechanism comprises a gas inlet seat. According to the two-stage pressure regulating fuel gas self-closing valve, the first-stage diaphragm is pressed to deform to enlarge the volume, a high-pressure gas source is changed into an intermediate pressure gas source, the initial pressure is ensured to be stable, the second-stage diaphragm is pressed to move upwards, the intermediate gas source is changed into low-pressure fuel gas, and then the second-stage spring is reset to open the gas inlet again to carry out pressure reduction operation again; therefore, secondary pressure reduction can be carried out, stable operation of gas equipment is guaranteed, and safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pressure regulating valve technical field, concretely is two stage pressure regulating gas self -closing valve. BACKGROUND

[0002] Pipeline gas self -closing valve, shortly self -closing valve, install on low pressure gas system pipeline, when pipeline gas pressure appears under pressure, overpressure, need not electricity or other external power, can automatically close and need manual opening device, in the prior art, the pressure regulating effect of gas self -closing valve is not ideal, makes the discharged gas still has bigger pressure, makes gas equipment difficult steady operation, and the safety is not ideal. CONTENT OF UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model provides two stage pressure regulating gas self -closing valve, solves the problem of the pressure regulating effect of gas self -closing valve is not ideal, makes the discharged gas still has bigger pressure, makes gas equipment difficult steady operation, and the safety is not ideal.

[0004] To realize above -mentioned purpose, the utility model passes through following technical scheme to realize: two stage pressure regulating gas self -closing valve, including valve body, the one side of valve body is equipped with inlet pipe, the one side of inlet pipe is equipped with primary pressure reducing mechanism, the bottom of valve body is equipped with outlet pipe, the one side of primary pressure reducing mechanism is equipped with exhaust mechanism, the top of exhaust mechanism is equipped with secondary pressure reducing mechanism, the top of valve body is equipped with top cap, is installed on the top cap pressure relief valve, the one side of valve body is equipped with reset button;

[0005] The primary pressure reducing mechanism includes the air inlet seat, the air inlet seat is installed with the primary diaphragm, the one side of primary diaphragm is equipped with primary spring, is seted up with the air inlet on the air inlet seat;

[0006] The exhaust mechanism includes the fixed seat, the inside sliding connection of fixed seat has movable rod and piston, the other end of movable rod is movably connected with movable pin, the top of movable pin is fixedly connected with rotating rod, the rotating rod is rotatably connected with support shaft;

[0007] The secondary pressure reducing mechanism includes the connecting seat, the top of connecting seat is fixedly connected with mounting seat, is equipped with compression spring on the mounting seat, is installed with secondary diaphragm on the mounting seat, the top of secondary diaphragm is equipped with secondary spring, the top of secondary spring is equipped with adjusting plate, the top of adjusting plate is fixedly connected with adjusting screw.

[0008] Preferably, the inside of the valve body is provided with a low pressure zone and an inlet zone, the inlet zone is arranged between the primary pressure reducing mechanism and the exhaust mechanism, and the low pressure zone is arranged between the secondary pressure reducing mechanism and the exhaust mechanism, so that the intermediate pressure gas source after pressure reduction in the inlet zone can enter the low pressure zone through the exhaust mechanism for secondary pressure reduction.

[0009] Preferably, the connecting seat and the end of the movable rod are provided with a strip-shaped slot, the movable pin is connected with the movable rod through the strip-shaped slot, and the top end of the rotating rod is connected with the connecting seat through the strip-shaped slot, so that the rotating rod can drive the connecting seat to move.

[0010] Preferably, the reset button is provided with a reset spring on one side, and the reset button is arranged on one side of the movable rod, so that the movable rod can be reset by the reset button.

[0011] Preferably, the rotating rod is rotationally connected with the inner wall of the valve body through a supporting shaft, and the rotating rod is arranged as a curved rod, so that the rotating rod can rotate around the supporting shaft as the center.

[0012] Preferably, the secondary diaphragm is mounted on the top cover, and the top end of the adjusting screw is provided with an adjusting slot, so that the adjusting screw can be conveniently rotated by using a tool.

[0013] The utility model provides two-stage pressure regulating gas self -closing valve. Compared with prior art has the following beneficial effects:

[0014] 1、 this two-stage pressure regulating gas self -closing valve, through the first diaphragm pressure occurs deformation expansion volume, change high pressure gas source into intermediate pressure gas source, ensure that the preliminary pressure is stable, the secondary diaphragm is pressed and moves upward, so that the intermediate gas source becomes low pressure gas, and then the secondary spring resets to reopen the air inlet to carry out again pressure reducing operation, so that secondary pressure reduction can be carried out, ensure that the gas equipment can stably run, improve safety.

[0015] 2、 this two-stage pressure regulating gas self -closing valve, through the pressure relief valve, when the gas pressure is greater than 1.5 times pressure, can carry out automatic pressure relief until the pressure is stable, improve safety. DRAWINGS

[0016] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0017] Fig. 2 It is the internal structure schematic diagram of the valve body of the utility model;

[0018] Fig. 3 It is the structure schematic diagram of the first pressure reducing mechanism, the second pressure reducing mechanism and the exhaust mechanism of the utility model.

[0019] In the figure: 1, valve body; 2, air inlet pipe; 3, air outlet pipe; 4, top cover; 5, reset button; 6, pressure relief valve; 7, air inlet seat; 8, primary diaphragm; 9, primary spring; 10, air inlet; 11, fixed seat; 12, piston; 13, movable rod; 14, rotating rod; 15, movable pin; 16, support shaft; 17, connecting seat; 18, mounting seat; 19, compression spring; 20, secondary diaphragm; 21, secondary spring; 22, adjusting plate; 23, adjusting screw; 24, reset spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figs. 1-3 The utility model provides a technical scheme: two-stage pressure regulating gas self-closing valve, the self-closing valve can realize the self-closing protection function of abnormal state (overpressure, underpressure and overcurrent state), and is prior art, so it will not be described again, including valve body 1, one side of valve body 1 is equipped with air inlet pipe 2, one side of air inlet pipe 2 is equipped with primary pressure reducing mechanism, the bottom of valve body 1 is equipped with air outlet pipe 3, one side of primary pressure reducing mechanism is equipped with exhaust mechanism, the top of exhaust mechanism is equipped with secondary pressure reducing mechanism, the inside of valve body 1 is equipped with low pressure area and air inlet area, the air inlet area is arranged between primary pressure reducing mechanism and exhaust mechanism, the low pressure area is arranged between secondary pressure reducing mechanism and exhaust mechanism, so that the intermediate pressure gas source after pressure reduction in air inlet area can enter low pressure area through exhaust mechanism to carry out secondary pressure reduction, the top of valve body 1 is equipped with top cover 4, the top cover 4 is installed with pressure relief valve 6, when the air pressure is greater than 1.5 times pressure, pressure relief valve 6 can carry out automatic pressure relief until the pressure is stable, one side of valve body 1 is equipped with reset button 5, one side of reset button 5 is equipped with reset spring 24, reset button 5 is arranged on one side of movable rod 13, so that reset button 5 can be used to reset movable rod 13, so that the self-closing valve needs to be opened manually after closing, and it is ensured that the gas will not be restored before the problem is solved.

[0022] Primary pressure reducing mechanism includes air inlet seat 7, air inlet seat 7 is installed with primary diaphragm 8, one side of primary diaphragm 8 is equipped with primary spring 9, air inlet 10 is formed in air inlet seat 7, after high-pressure gas source enters through air inlet 10, primary diaphragm 8 is deformed to expand the volume under pressure, and primary spring 9 is compressed, so that the high-pressure gas source becomes intermediate pressure gas source, and the initial pressure is ensured to be stable.

[0023] The exhaust mechanism comprises a fixed seat 11, a movable rod 13 and a piston 12 are slidably connected inside the fixed seat 11, a movable pin 15 is movably connected to the other end of the movable rod 13, a rotating rod 14 is fixedly connected to the top end of the movable pin 15, a supporting shaft 16 is rotatably connected to the rotating rod 14, the rotating rod 14 is rotatably connected to the inner wall of the valve body 1 through the supporting shaft 16, the rotating rod 14 is arranged as a curved rod, so that the rotating rod 14 can rotate around the supporting shaft 16 as the center, the piston 12 moves after being pressed, the fixed seat 11 is opened, the intermediate pressure gas source enters the low pressure area, at the same time, the piston 12 drives the movable rod 13 to move, the movable rod 13 drives the rotating rod 14 to rotate, so that the rotating rod 14 can drive the connecting seat 17 to move.

[0024] The secondary pressure reducing mechanism comprises a connecting seat 17, a strip-shaped groove is formed in the end of the connecting seat 17 and the movable rod 13, the movable pin 15 is connected to the movable rod 13 through the strip-shaped groove, the top end of the rotating rod 14 is connected to the connecting seat 17 through the strip-shaped groove, so that the rotating rod 14 can drive the connecting seat 17 to move, the connecting seat 17 is fixedly connected to a mounting seat 18 at the top end, the mounting seat 18 is provided with a compression spring 19, so that the secondary diaphragm 20 can be installed on the mounting seat 18, the mounting seat 18 is installed with the secondary diaphragm 20, the secondary diaphragm 20 is installed on the top cover 4, the secondary diaphragm 20 is provided with a secondary spring 21 at the top, which can reset the secondary diaphragm 20, the secondary spring 21 is provided with an adjusting plate 22 at the top, the adjusting plate 22 is fixedly connected to an adjusting screw 23 at the top, and the adjusting screw 23 is provided with an adjusting groove at the top end, so that the adjusting screw 23 can be conveniently rotated by using a tool.

[0025] In work, the high-pressure gas passes through the gas inlet 10 on the gas inlet seat 7 to send the pressure to the inside of the valve body 1, the primary diaphragm 8 is deformed to expand the volume under the pressure, and the primary spring 9 is compressed, so that the high-pressure gas source becomes an intermediate pressure gas source, ensuring the preliminary pressure stability, after the pressure is stable, the piston 12 is in an open state, the intermediate pressure gas source passes through the fixed seat 11 to enter the low pressure area, the secondary diaphragm 20 moves upward under the pressure and compresses the secondary spring 21, the secondary diaphragm 20 drives the mounting seat 18 to move, the mounting seat 18 drives the connecting seat 17 to move, the connecting seat 17 drives the rotating rod 14 to rotate, the rotating rod 14 drives the movable rod 13 to move, the movable rod 13 drives the piston 12 to move to close the gas inlet 10, so that the intermediate gas source becomes low-pressure gas, then the secondary spring 21 resets to reopen the gas inlet 10 for repressure reducing operation, so that the secondary pressure reduction can be realized, ensuring that the gas equipment can stably operate and improving the safety.

[0026] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

Claims

1. A two-stage pressure regulating gas self-closing valve comprising a valve body (1), characterized in that: The valve body (1) is provided with an air inlet pipe (2) on one side, the air inlet pipe (2) is provided with a primary pressure reducing mechanism on one side, the valve body (1) is provided with an air outlet pipe (3) at the bottom, the primary pressure reducing mechanism is provided with an exhaust mechanism on one side, the exhaust mechanism is provided with a secondary pressure reducing mechanism at the top, the valve body (1) is provided with a top cover (4) at the top, the top cover (4) is provided with a pressure relief valve (6), the valve body (1) is provided with a reset button (5) on one side. The primary pressure reducing mechanism comprises an air inlet seat (7), the air inlet seat (7) is provided with a primary diaphragm (8), the primary diaphragm (8) is provided with a primary spring (9) on one side, and the air inlet seat (7) is provided with an air inlet (10). The exhaust mechanism comprises a fixed seat (11), the fixed seat (11) is slidably connected with a movable rod (13) and a piston (12) inside, the movable rod (13) is movably connected with a movable pin (15) at the other end, the movable pin (15) is fixedly connected with a rotating rod (14) at the top end, and the rotating rod (14) is rotatably connected with a supporting shaft (16). The secondary pressure reducing mechanism comprises a connecting seat (17), the connecting seat (17) is fixedly connected with a mounting seat (18) at the top end, the mounting seat (18) is provided with a compression spring (19), the mounting seat (18) is provided with a secondary diaphragm (20), the secondary diaphragm (20) is provided with a secondary spring (21) at the top, the secondary spring (21) is provided with an adjusting plate (22) at the top, and the adjusting plate (22) is fixedly connected with an adjusting screw (23) at the top.

2. The two-stage pressure regulating gas self-closing valve according to claim 1, characterized in that: The valve body (1) is provided with a low pressure area and an air inlet area inside, the air inlet area is arranged between the primary pressure reducing mechanism and the exhaust mechanism, and the low pressure area is arranged between the secondary pressure reducing mechanism and the exhaust mechanism.

3. The two-stage pressure regulating gas self-closing valve according to claim 1, characterized in that: The connecting seat (17) and the end of the movable rod (13) are both provided with a strip-shaped groove, the movable pin (15) is connected with the movable rod (13) through the strip-shaped groove, and the top end of the rotating rod (14) is connected with the connecting seat (17) through the strip-shaped groove.

4. The two-stage pressure regulating gas self-closing valve according to claim 1, characterized in that: The reset button (5) is provided with a reset spring (24) on one side, and the reset button (5) is arranged on one side of the movable rod (13).

5. The two-stage pressure regulating gas self-closing valve according to claim 1, characterized in that: The rotating rod (14) is rotatably connected with the inner wall of the valve body (1) through the supporting shaft (16), and the rotating rod (14) is arranged as a curved rod.

6. The two-stage pressure regulating gas self-closing valve according to claim 1, characterized in that: The secondary diaphragm (20) is mounted on the top cover (4), and the top end of the adjusting screw (23) is provided with an adjusting groove.

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