Gas cut-off valve with high safety

Abstract

The utility model relates to the technical field of cut-off valves, in particular to a high-safety gas cut-off valve which comprises a gas cut-off valve body and two connecting pipelines, flanges are fixedly connected to one end of the gas cut-off valve body and one end of one connecting pipeline, a first sealing shell and a second sealing shell are connected to the outer surfaces of the two flanges in a sleeved mode, and the first sealing shell and the second sealing shell are fixedly connected to the gas cut-off valve body. And a sealing groove is formed in one side of the first sealing shell. The gas cut-off valve has the advantages that through matched arrangement of the first sealing shell, the second sealing shell, the sealing groove, the sealing frame, the fixing plate, the exhaust pipe, the gas sensor, the three-way valve, the recovery tank, the mounting plate, the controller and the alarm, alarm operation can be automatically carried out when leakage occurs at the joint of the gas cut-off valve body and a connecting pipeline; the gas cut-off valve structure is simple in structure, convenient to use, capable of avoiding the situation that gas leaks outside, capable of collecting the gas, capable of avoiding the situation of gas waste and capable of avoiding the situation of gas explosion, and therefore the safety of the gas cut-off valve structure is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to cut -out valve technical field, especially a high safety gas cut -out valve. BACKGROUND

[0002] The cut -out valve is one kind of actuator in automation system, is composed of multi -spring pneumatic diaphragm actuator or floating piston actuator and regulating valve, the purpose of cut -out valve is very wide, can be used for cutting off gas, combustion air, cold wind and flue gas etc., needs to use cut -out valve in the process of gas transportation.

[0003] The gas cut -out valve is generally connected with the gas pipeline through the flange, although this connection mode can guarantee the connection firmness of the gas cut -out valve and the gas pipeline, but the flange at the connection of the gas cut -out valve and the gas pipeline can appear loose after long -term use, at this time, gas leakage will be caused, and the existing gas cut -out valve structure is relatively simple, cannot timely alarm reminding operation when gas leaks, and gas leakage meets the open fire and appears the explosion situation, has certain dangerous nature, therefore need a high safety gas cut -out valve to solve the above -mentioned problems. SUMMARY

[0004] The utility model discloses at least one of the technical defects.

[0005] Therefore, one purpose of the utility model is to provide a high safety gas cut -out valve to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0006] In order to achieve the above -mentioned purpose, one embodiment of the utility model provides a high safety gas cut -out valve, which comprises a gas cut -out valve body and two connecting pipelines, the gas cut -out valve body and one end of one connecting pipeline are fixedly connected with flanges, the outer surfaces of the two flanges are sleeved with first sealing shell and second sealing shell, a sealing groove is formed in one side of the first sealing shell, a sealing frame is fixedly connected with the sealing groove in one side of the second sealing shell, the outer surfaces of the first sealing shell and the second sealing shell are fixedly connected with two fixed plates connected with each other, a first exhaust pipe is fixedly connected with the outer surface of the first sealing shell, a gas sensor is arranged on the first exhaust pipe, a tee joint valve is fixedly connected with one end of the first exhaust pipe away from the first sealing shell, a recovery tank is fixedly connected with one connecting position of the tee joint valve through a pipeline, an installation plate is fixedly installed on the gas cut -out valve body, a controller and an alarm are arranged on one side of the installation plate.

[0007] It is preferred that the recovery tank is fixedly connected with a second exhaust pipe on one side, and an exhaust valve is arranged on the second exhaust pipe.

[0008] Preferably, according to any one of the above solutions, the first sealing shell and the second sealing shell are both arc-shaped, and the first sealing shell and the second sealing shell are sized to match each other.

[0009] Preferably, according to any one of the above solutions, the flange is located inside the first sealing shell and the second sealing shell, and the inner diameters of the first sealing shell and the second sealing shell are equal to the outer diameter of the connecting pipeline.

[0010] Preferably, according to any one of the above solutions, the gas sensor is electrically connected to the controller, and the controller is electrically connected to the alarm.

[0011] Preferably, according to any one of the above solutions, the sealing frame and the sealing groove are both U-shaped in cross section, and the sealing frame and the sealing groove are sized to match each other.

[0012] Compared with the prior art, the utility model has the advantages and beneficial effects that:

[0013] Through the cooperation of the first sealing shell, the second sealing shell, the sealing groove, the sealing frame, the fixed plate, the first exhaust pipe, the gas sensor, the three-way valve, the recovery tank, the mounting plate, the controller and the alarm, the alarm operation can be automatically performed when leakage occurs at the connection between the gas shut-off valve body and the connecting pipeline, gas leakage in the outside environment can be avoided, gas can be collected, gas waste can be avoided, gas explosion can be avoided, and the safety of the gas shut-off valve structure is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a first perspective structural schematic view of the utility model;

[0015] Figure 2 It is a second perspective structural schematic view of the utility model;

[0016] Figure 3 It is a structural schematic view of the utility model without assembling the first sealing shell and the second sealing shell;

[0017] Figure 4 It is a structural schematic view of the first sealing shell of the utility model;

[0018] Figure 5 It is a structural schematic view of the second sealing shell of the utility model.

[0019] In the drawing: 1-gas shut-off valve body, 2-connecting pipeline, 3-flange, 4-first sealing shell, 5-second sealing shell, 6-sealing groove, 7-sealing frame, 8-fixed plate, 9-first exhaust pipe, 10-gas sensor, 11-three-way valve, 12-recovery tank, 13-mounting plate, 14-controller, 15-alarm, 16-second exhaust pipe, 17-exhaust valve. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0021] like Figures 1 to 5 As shown, a high-safety gas shut-off valve includes a gas shut-off valve body 1 and two connecting pipes 2. A flange 3 is fixedly connected to one end of both the gas shut-off valve body 1 and one connecting pipe 2. A first sealing shell 4 and a second sealing shell 5 are fitted onto the outer surfaces of the two flanges 3. A sealing groove 6 is formed on one side of the first sealing shell 4. A sealing frame 7, which engages with the sealing groove 6, is fixedly connected to one side of the second sealing shell 5. Two interconnected fixing plates 8 are fixedly connected to the outer surfaces of both the first and second sealing shells 4. A first exhaust pipe 9 is fixedly connected to the outer surface of the first sealing shell 4. A gas sensor 10 is installed on the first exhaust pipe 9. A three-way valve 11 is fixedly connected to the end of the first exhaust pipe 9 furthest from the first sealing shell 4. One end of the three-way valve 11 is connected to... A recovery tank 12 is fixedly connected to the gas shut-off valve body 1 via a pipeline. An installation plate 13 is fixedly installed on the gas shut-off valve body 1. A controller 14 and an alarm 15 are provided on one side of the installation plate 13. Under normal conditions, the flange is located inside the two first sealing shells 4 and the second sealing shell 5, and the sealing frame 7 is inserted into the sealing groove 6. When a leak occurs at the gas shut-off valve body 1 and the connecting pipeline 2, the leaked gas will enter the two first sealing shells 4 and the two second sealing shells 5, and then the gas will enter the first exhaust pipe 9. At this time, the gas sensor 10 will transmit a signal to the controller 14, thereby causing the controller 14 to control the alarm 15 to sound an alarm, alerting the surrounding personnel that a gas leak has occurred and prompting them to carry out maintenance.

[0022] As an optional technical solution of this utility model, a second exhaust pipe 16 is fixedly connected to one side of the recycling tank 12, and an exhaust valve 17 is provided on the second exhaust pipe 16. The gas inside the recycling tank 1 can be discharged through the second exhaust pipe 16 and the exhaust valve 17.

[0023] As an optional technical solution of this utility model, the first sealing shell 4 and the second sealing shell 5 are both arc-shaped, and the sizes of the first sealing shell 4 and the second sealing shell 5 are matched, so that the sealing performance between the first sealing shell 4 and the second sealing shell 5 is relatively good.

[0024] As an optional technical solution of this utility model, the flange 3 is located inside the first sealing shell 4 and the second sealing shell 5. The inner diameter of the first sealing shell 4 and the second sealing shell 5 are both equal to the outer diameter of the connecting pipe 2, so that the sealing performance between the first sealing shell 4, the second sealing shell 5 and the connecting pipe 2 is relatively good.

[0025] As an optional technical scheme of the utility model, the gas sensor 10 is electrically connected with the controller 14, and the controller 14 is electrically connected with the alarm 15, so that the controller 14 can control the opening and closing of the alarm 15 according to the signal of the gas sensor 10.

[0026] As an optional technical scheme of the utility model, the cross-sectional shape of the sealing frame 7 and the sealing groove 6 is U-shaped, and the sealing frame 7 and the sealing groove 6 are matched in size, so that the sealing property between the first sealing shell 4 and the second sealing shell 5 is good.

[0027] A safety high gas cut-off valve, working principle as follows:

[0028] When the gas cut-off valve body 1 and the connecting pipeline 2 appear the leakage condition, the leaked gas will enter the inside of the two first sealing shells 4 and the two second sealing shells 5, and then the gas will enter the inside of the first exhaust pipe 9, at this time, the gas sensor 10 will deliver the signal to the controller 14, so that the controller 14 controls the alarm 15 to issue the alarm sound, reminds the surrounding personnel to appear the gas leakage condition, reminds the surrounding personnel to carry out the maintenance, and the leaked gas is discharged through the first exhaust pipe 9 and enters the inside of the recovery tank 12 to carry out the collection operation.

[0029] In summary, the safety high gas cut-off valve, through the cooperation of the first sealing shell 4, the second sealing shell 5, the sealing groove 6, the sealing frame 7, the fixed plate 8, the first exhaust pipe 9, the gas sensor 10, the three-way valve 11, the recovery tank 12, the mounting plate 13, the controller 14 and the alarm 15, can automatically carry out the alarm operation when the gas cut-off valve body 1 and the connecting pipeline 2 appear the leakage condition, and can avoid the gas leakage in the outside and collect the gas, avoid the gas waste condition, and avoid the gas explosion condition, so that the safety of the structure of the gas cut-off valve is good.

Claims

1. A gas shutoff valve with high safety, characterized by: The utility model relates to a gas cut -off valve, including gas cut -off valve body (1) and two connecting pipes (2), one end of gas cut -off valve body (1) and one connecting pipe (2) are fixedly connected with flange (3), the outer surface of two flanges (3) is sleeved with first sealing shell (4) and second sealing shell (5), one side of first sealing shell (4) is provided with sealing groove (6), one side of second sealing shell (5) is fixedly connected with sealing frame (7) of sealing groove (6) is connected, the outer surface of first sealing shell (4) and second sealing shell (5) is fixedly connected with two mutually connected fixed plates (8), the outer surface of first sealing shell (4) is fixedly connected with first exhaust pipe (9), is provided with gas sensor (10) on first exhaust pipe (9), the one end of first exhaust pipe (9) away from first sealing shell (4) is fixedly connected with three -way valve (11), one connection of three -way valve (11) is fixedly connected with recovery tank (12) through pipeline, the installation plate (13) of fixed mounting is installed on gas cut -off valve body (1), one side of installation plate (13) is provided with controller (14) and alarm (15).

2. The gas shutoff valve with high safety according to claim 1, characterized in that: One side of recovery tank (12) is fixedly connected with second exhaust pipe (16), and exhaust valve (17) is arranged on second exhaust pipe (16).

3. The gas shutoff valve with high safety according to claim 2, characterized in that: The shape of first sealing shell (4) and second sealing shell (5) is arc-shaped, and the size of first sealing shell (4) and second sealing shell (5) is matched.

4. The gas shutoff valve with high safety according to claim 3, characterized in that: The flange (3) is located in the first sealing shell (4) and the second sealing shell (5), and the inner diameter of the first sealing shell (4) and the second sealing shell (5) is equal to the outer diameter of the connecting pipe (2).

5. The gas shutoff valve with high safety according to claim 4, characterized in that: The gas sensor (10) is electrically connected with the controller (14), and the controller (14) is electrically connected with the alarm (15).

6. The gas shutoff valve with high safety according to claim 5, characterized in that: The cross-sectional shape of the sealing frame (7) and the sealing groove (6) is U-shaped, and the size of the sealing frame (7) and the sealing groove (6) is matched.

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