Gas self-closing valve with insulating joint

Abstract

The fuel gas self-closing valve comprises a valve body, an upper cover, a diaphragm, a sealing gasket and a valve rod, a fuel gas channel is arranged in the valve body and comprises a gas inlet channel and a gas outlet channel, a valve port is arranged between the gas inlet channel and the gas outlet channel, the diaphragm is arranged in the gas outlet channel, and the sealing gasket is arranged on the upper cover. The upper cover is arranged on the valve body and fixed outside the diaphragm, the sealing gasket is arranged at the inner end of the diaphragm, an upper adjusting plate is arranged on the valve port, the lower end of the valve rod penetrates through the interior of the upper adjusting plate, a lower adjusting plate is arranged at the lower end of the valve rod, and the upper adjusting plate and the lower adjusting plate correspond to each other up and down. An upper adjusting hole is formed in the side wall of the upper adjusting plate, a lower adjusting hole is formed in the side wall of the lower adjusting plate, and the valve rod can rotate in the upper cover and drive the lower adjusting plate to rotate. The gas self-closing valve has the effect of improving the adaptability of the gas self-closing valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas pipeline valves, in particular to a gas self-closing valve with an insulating joint. BACKGROUND

[0002] The pipeline gas self-closing valve is installed on a low-pressure gas system pipeline, and can automatically close and manually open without electricity or other external power when the pipeline gas pressure is under pressure or over pressure. The gas self-closing valve has only two states of opening and closing in use, and cannot meet the requirement of different flow capacities on the market, so a gas self-closing valve with an insulating joint is provided. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at the defects and deficiencies of the prior art, and provides a gas self-closing valve with an insulating joint.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model discloses a valve body, upper cover, diaphragm, sealing gasket and valve rod, the valve body has gas passage, the gas passage includes inlet passage and outlet passage, the inlet passage and the outlet passage are provided with valve port, the diaphragm is arranged in the outlet passage, the upper cover is arranged on the valve body and is fixed outside the diaphragm, the valve rod is inserted and is slipped in the upper cover, the diaphragm sleeve is connected and is fixed on the periphery of the valve rod, the sealing gasket is arranged at the inner end of the diaphragm, the upper adjusting plate is arranged on the valve port, the lower end of the valve rod passes in the upper adjusting plate, the lower end of the valve rod is provided with lower adjusting plate, the upper adjusting plate and lower adjusting plate are in upper and lower correspondence, the sidewall of the upper adjusting plate is provided with upper adjusting hole, the sidewall of the lower adjusting plate is provided with lower adjusting hole, the valve rod can rotate in the upper cover and drive the lower adjusting plate to rotate, the inlet passage is provided with speed limiting piece.

[0006] Preferably, the speed limiting piece includes a mounting frame, a plug, a slide rod and a compression spring, one end of the slide rod is arranged on one end of the plug, the other end of the plug can block one end of the mounting frame, the compression spring is sleeved on the periphery of the slide rod, and the compression spring can drive the plug and the outlet of the mounting frame to move away.

[0007] Preferably, the outer end of the valve port is sleeved with a fixing sleeve, and the fixing sleeve fixes the upper adjusting plate on the valve port.

[0008] Preferably, the upper end of the valve port is provided with a mounting groove, and the upper adjusting plate is embedded in the mounting groove.

[0009] Preferably, the outer end of the mounting frame is provided with a mounting plate, the valve body is provided with an embedding groove on the inner peripheral side of the air inlet channel, and the mounting plate is located in the embedding groove.

[0010] Preferably, a bearing is arranged between the valve rod and the upper cover, the inner peripheral side of the bearing is provided with a limiting strip, and the sidewall of the valve rod is provided with a sliding groove for vertical sliding of the limiting strip.

[0011] Preferably, the upper adjusting plate and the lower adjusting plate are made of ceramic.

[0012] In summary, the beneficial technical effects of the present application are as follows:

[0013] When the gas self-closing valve needs to be opened, the valve rod is pulled to drive the middle part of the diaphragm to move upward, so that the sealing gasket is separated from the valve port, then the lower adjusting plate and the upper adjusting plate are in contact with each other, then the valve rod is rotated, so that the overlapping part between the upper adjusting hole of the upper adjusting plate and the lower adjusting hole of the lower adjusting plate changes, the flow of gas flowing into the air inlet channel into the air outlet channel changes, thereby the gas self-closing valve can adapt to different conditions, and the adaptability of the gas self-closing valve is improved. When the gas flow in the gas channel becomes larger, the plug is pushed and the outlet of the mounting frame is blocked, so that the gas flow in the gas channel stops, then the diaphragm drives the valve rod to move downward, so that the sealing gasket seals the upper adjusting hole of the upper adjusting plate, thereby improving the safety of the gas self-closing valve. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a sectional view of the gas self-closing valve of the present application;

[0015] Figure 2 is Figure 1 is an enlarged view of position A in figure;

[0016] Figure 3 is Figure 1 is an enlarged view of position B in figure;

[0017] Figure 4 is a structural schematic view of the speed limiting piece of the present application.

[0018] In the figure: 1, valve body; 2, upper cover; 3, diaphragm; 4, sealing gasket; 5, valve rod; 6, gas channel; 7, air inlet channel; 8, air outlet channel; 9, valve port; 10, mounting groove; 11, upper adjusting plate; 12, fixed sleeve; 13, upper adjusting hole; 14, lower adjusting plate; 15, lower adjusting hole; 16, bearing; 17, limiting strip; 18, sliding groove; 19, speed limiting piece; 20, mounting frame; 21, plug; 22, sliding rod; 23, compression spring; 24, circular ring; 25, stand; 26, fixed frame; 27, limiting plate; 28, mounting plate; 29, embedding groove. DETAILED DESCRIPTION

[0019] The utility model will be further described below with reference to the drawings.

[0020] The application discloses a gas self-closing valve with an insulating joint.

[0021] With reference to Figure 1 , including valve body 1, upper cover 2, diaphragm 3, gasket 4 and valve rod 5, valve body 1 has gas passage 6, gas passage 6 includes air inlet passage 7 and air outlet passage 8, valve port 9 is arranged between air inlet passage 7 and air outlet passage 8, valve port 9 communicates air inlet passage 7 and air outlet passage 8, the side wall of the inner end of air outlet passage 8 is communicated with the outer side wall of valve body 1, diaphragm 3 is located in air outlet passage 8, upper cover 2 is fixed on valve body 1 by bolt and is pressed on the outside of diaphragm 3, valve rod 5 is inserted and slid in the middle part of upper cover 2, gasket 4 is embedded and fixed in the inner end of diaphragm 3, and gasket 4 is sleeved and fixed on the circumferential side of valve rod 5.

[0022] With reference to Figure 2 , the upper end face of valve port 9 is provided with mounting groove 10, upper adjusting plate 11 is placed in mounting groove 10, fixed sleeve 12 is sleeved on the outer end of valve port 9, the vertical section of fixed sleeve 12 is in the shape of "L", one end of fixed sleeve 12 abuts against upper adjusting plate 11, the side wall of upper adjusting plate 11 is throughly provided with upper adjusting hole 13, the other end of fixed sleeve 12 is threadedly fixed on the circumferential side of valve port 9, valve rod 5 is inserted and slid in upper adjusting plate 11, lower adjusting plate 14 is fixedly installed on the lower end of valve rod 5, the side wall of lower adjusting plate 14 is throughly provided with lower adjusting hole 15, upper adjusting hole 13 and lower adjusting hole 15 are in the shape of circular arc and the angle is 180°, when upper adjusting plate 11 and lower adjusting plate 14 relatively rotate, upper adjusting hole 13 and lower adjusting hole 15 correspond to each other, upper adjusting plate 11 and lower adjusting plate 14 are both made of ceramic. Pulling valve rod 5 drives the middle part of diaphragm 3 to move upwards, so that gasket 4 is separated from valve port 9, then lower adjusting plate 14 and upper adjusting plate 11 are in contact with each other, then valve rod 5 is rotated, so that the overlapping part between upper adjusting hole 13 of upper adjusting plate 11 and lower adjusting hole 15 of lower adjusting plate 14 changes, so that the flow of gas flowing from air inlet passage 7 into air outlet passage 8 changes.

[0023] The middle part of upper cover 2 is embedded with bearing 16, the inner circumferential side of bearing 16 is vertically and integrally provided with limiting strip 17, the side wall of valve rod 5 is provided with sliding groove 18 for the vertical sliding of limiting strip 17.

[0024] With reference to Figure 3 and Figure 4The speed limiting piece 19 is arranged in the air inlet channel 7, and the speed limiting piece 19 comprises a mounting frame 20, a plug 21, a sliding rod 22 and a compression spring 23. The mounting frame 20 comprises a circular ring 24, four stand columns 25 and a fixing frame 26. One end of each of the four stand columns 25 is uniformly and integrally arranged on the circumferential side of the circular ring 24. The fixing frame 26 is fixed between the other ends of the four stand columns 25. The middle part of the fixing frame 26 is provided with a penetrating hole. The sliding rod 22 is inserted and slid in the penetrating hole. The plug 21 is slid between the four stand columns 25. One end of the sliding rod 22 is inserted and fixed in the side wall of the plug 21. The other end of the sliding rod 22 is fixed with a limiting plate 27 through a bolt. The compression spring 23 is located between the limiting plate 27 and the fixing frame 26 and is sleeved on the circumferential side of the sliding rod 22. The four stand columns 25 are integrally provided with a mounting plate 28 on the outer circumferential side of the end away from the circular ring 24. The valve body 1 is provided with an embedding groove 29 on the inner side wall of the outer end of the air inlet channel 7. The mounting plate 28 is fixed in the embedding groove 29 through a bolt. When the gas flow in the gas channel 6 becomes large, the plug 21 is pushed and the outlet of the mounting frame 20 is blocked, so that the gas flow in the gas channel 6 is stopped. Then, the valve rod 5 is driven to move downward under the rebound of the diaphragm 3, so that the sealing gasket 4 seals the upper adjusting hole 13 of the upper adjusting plate 11.

[0025] The above only describes preferred embodiments of the present application, and equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A gas self-closing valve with insulated joint, comprising a valve body (1), an upper cover (2), a diaphragm (3), a sealing gasket (4) and a valve rod (5), the valve body (1) has a gas passage (6) therein, the gas passage (6) comprises an inlet passage (7) and an outlet passage (8), a valve port (9) is arranged between the inlet passage (7) and the outlet passage (8), the diaphragm (3) is arranged in the outlet passage (8), the upper cover (2) is arranged on the valve body (1) and fixed outside the diaphragm (3), the valve rod (5) is inserted and slid in the upper cover (2), the diaphragm (3) is sleeved and fixed on the circumferential side of the valve rod (5), and the sealing gasket (4) is arranged at the inner end of the diaphragm (3), characterized in that: The valve port (9) is provided with an upper adjusting plate (11), the lower end of the valve rod (5) penetrates the upper adjusting plate (11), the lower end of the valve rod (5) is provided with a lower adjusting plate (14), the upper adjusting plate (11) and the lower adjusting plate (14) correspond to each other in an up-down mode, the side wall of the upper adjusting plate (11) is provided with an upper adjusting hole (13), the side wall of the lower adjusting plate (14) is provided with a lower adjusting hole (15), the valve rod (5) can rotate in the upper cover (2) and drive the lower adjusting plate (14) to rotate, and the air inlet channel (7) is provided with a speed limiting piece (19).

2. The gas self-closing valve with insulated joint according to claim 1, characterized in that The speed limiting piece (19) comprises a mounting frame (20), a plug (21), a sliding rod (22) and a compression spring (23), one end of the sliding rod (22) is arranged at one end of the plug (21), the other end of the plug (21) can block one end of the mounting frame (20), the compression spring (23) is sleeved on the side of the sliding rod (22), and the compression spring (23) can drive the plug (21) and the outlet of the mounting frame (20) to move away.

3. The gas self-closing valve with insulated joint according to claim 1, characterized in that, The outer end of the valve port (9) is sleeved with a fixing sleeve (12), and the fixing sleeve (12) fixes the upper adjusting plate (11) on the valve port (9).

4. The gas self-closing valve with insulated joint according to claim 1, characterized in that, The upper end of the valve port (9) is provided with a mounting groove (10), and the upper adjusting plate (11) is embedded in the mounting groove (10).

5. The gas self-closing valve with insulated joint according to claim 2, characterized in that, The outer end of the mounting frame (20) is provided with a mounting plate (28), and the valve body (1) is provided with an embedding groove (29) on the inner circumferential side of the air inlet channel (7), and the mounting plate (28) is located in the embedding groove (29).

6. The gas self-closing valve with insulated joint according to claim 1, characterized in that A bearing (16) is arranged between the valve rod (5) and the upper cover (2), the inner circumferential side of the bearing (16) is provided with a limiting strip (17), and the side wall of the valve rod (5) is provided with a sliding groove (18) for vertical sliding of the limiting strip (17).

7. The gas self-closing valve with insulated joint according to claim 1, characterized in that The upper adjusting plate (11) and the lower adjusting plate (14) are made of ceramic.

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