Emergency cut-off valve

Abstract

The utility model discloses an emergency cut-off valve which comprises a valve main body, an induction device is arranged in the valve main body, the valve main body is communicated with an external pressure source, and the induction device is communicated with the valve main body and the external pressure source, so that when the state of the induction device is changed, the valve main body and the external pressure source are closed. The external pressure source can cut off the valve body. In the utility model, when an emergency situation occurs, the sensing device is triggered, so that a pressure medium supplied to the valve main body by an external pressure source flows out, further the pressure in the valve main body is reduced, and the valve can automatically fall back and be closed in a state less than 0.5 s, so that a pipeline is cut off, the loss is reduced, meanwhile, an operator does not need to operate the valve, and the working efficiency is improved. And the safety can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve technical field, concretely relates to an emergency cut-off valve. BACKGROUND

[0002] For part factory inside use's cut-off valve, because historical reason (valve quantity is too much, batch replacement automatic valve cost is higher), most are using manual valve, for example gate valve, butterfly valve, ball valve etc., but manual cut-off valve needs through hand wheel to close valve, needs manual operation simultaneously and is time -consuming, when meeting emergency, needs first time to evacuate worker, and wants to be far from pressure container and pressure pipeline etc., but medium in pressure container or pipeline is still continuing to output, if it is flammable and explosive gas, meets open fire and has the possibility to cause explosion, causes greater property loss. UTILITARY MODEL CONTENT

[0003] The utility model discloses a kind of emergency cut-off valves to solve the above problems.

[0004] The utility model discloses a kind of emergency cut-off valves to solve the above problems.

[0005] An emergency cut-off valve, including valve main body, the inside of the valve main body is provided with inductive device, the valve main body is connected with external pressure source, and the inductive device is communicated with the valve main body and the external pressure source, so that when the inductive device state changes, the external pressure source can cut off the valve main body.

[0006] As further description of the above technical solution, the valve main body includes valve cover, valve body and the intermediate body between the valve cover and valve body;

[0007] The bottom of the valve cover is provided with valve rod, the top of the valve rod is provided with spring, the valve rod penetrates the intermediate body so that the valve flap below it is in the valve body;

[0008] The upper end of the spring is provided with pressing plate, and the upper end of the pressing plate is provided with adjusting screw.

[0009] As further description of the above technical solution, the top of the adjusting screw is provided with sheath.

[0010] As further description of the above technical solution, the inductive device includes fuse plug arranged at one end of the intermediate body, the other end of the intermediate body is provided with cavity, and the cavity is communicated with external pressure source.

[0011] As a further description of the above technical solution, the fuse plug is in a columnar structure, and is inserted into a cavity at one end of the intermediate body.

[0012] As a further description of the above technical solution, the fuse plug is made of a low-melting-point metal or non-metal material.

[0013] As a further description of the above technical solution, the medium in the external pressure source is any one of oil, gas or water.

[0014] As a further description of the above technical solution, a diaphragm is arranged at the top of the valve rod, is fixed to the upper end of the intermediate body, and the top of the intermediate body has a recessed area, which, together with the diaphragm and the sealed space formed by the inductive device, can accommodate the pressure medium in the external pressure source.

[0015] As a further description of the above technical solution, a through groove for accommodating the valve rod is arranged in the intermediate body, and a sealing element is arranged between the through groove and the valve rod.

[0016] The beneficial effects of the present application are as follows:

[0017] When an emergency occurs, for example, a fire, the inductive device is triggered, the pressure medium supplied by the external pressure source flows out of the valve body, and the pressure in the valve body is reduced, so that the valve automatically falls and closes in less than 0.5s, thereby cutting off the pipeline and reducing the loss, and at the same time, the operator does not need to operate the valve, which can effectively improve the safety.

[0018] To more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a schematic view of the cut-off valve connected with the external gas source in the present application;

[0020] Fig. 2 is a sectional view of the cut-off valve in the present application.

[0021] Reference signs: 1, sheath; 2, adjusting screw; 3, locking nut; 4, spring pressing plate; 5, valve cover; 6, spring; 7, nut; 9, diaphragm pressing plate; 10, fastener; 11, diaphragm; 12, diaphragm lower pressing plate; 13, fuse plug; 14, intermediate body; 15, valve rod; 16, valve flap; 17, valve body; 18, external pressure source. DETAILED DESCRIPTION

[0022] For the purpose, technical scheme and advantages of the embodiments of the utility model to be clearer, the following will combine the drawings in the embodiments of the utility model, make the technical scheme in the embodiments of the utility model clear, complete description.

[0023] As Figs. 1-2 Indicated, in an embodiment, an emergency cut-off valve, the inside of valve body is provided with induction device, valve body is connected with external pressure source 18, and induction device communicates valve body with external pressure source 18, so that external pressure source 18 can cut off valve body when induction device state changes.

[0024] In use, when encountering emergency, for example, fire, induction device is triggered, makes the pressure medium supplied to valve body by external pressure source 18 flow out, and then makes the pressure in valve body reduce, can realize the automatic fall and close of valve in less than 0.5s state, thereby cutting off pipeline, reduces the loss, simultaneously need not the operator to operate valve, can effectively improve security.

[0025] Optionally, the valve body, i.e. cut-off valve, comprises sheath 1, adjusting screw 2, adjusting nut 7, spring pressing plate 4, valve cover 5, spring 6, nut 7, diaphragm pressing plate 9, fastener 10, diaphragm 11, diaphragm lower pressing plate 12, fuse plug 13, intermediate body 14, valve stem 15, valve flap 16 and valve body 17 from top to bottom in turn, wherein intermediate body 14 is arranged between valve cover 5 and valve body 17, valve stem 15 is arranged at the bottom of valve cover 5, spring 6 is arranged at the top of valve stem 15, valve stem 15 penetrates intermediate body 14 so that valve flap 16 below it is in valve body 17, pressing plate, i.e. spring pressing plate 4, is arranged at the upper end of spring 6, adjusting screw 2 is arranged above spring pressing plate 4, before use, the operator adjusts the compression amount of spring 6 by adjusting screw 2. For example, clockwise rotation, increase spring 6 pressure, counterclockwise decrease spring 6 pressure, so that the pressure of external pressure source 18 can just push open spring 6, make valve body be in open state. Further, sheath 1 is arranged outside adjusting screw 2, can effectively protect adjusting screw 2, avoid affecting the state of valve after adjusting screw 2 is misoperated.

[0026] Optionally, induction device comprises fuse plug 13 arranged at one end of intermediate body 14, the other end of intermediate body 14 is provided with cavity, and the cavity is communicated with external pressure source 18. The top of valve stem 15 is provided with diaphragm 11, diaphragm 11 is fixed to the upper end of intermediate body 14, and the top of intermediate body 14 has recessed area, and the recessed area can accommodate pressure medium in external pressure source 18 in the closed space formed by diaphragm 11 and induction device. After the pressure of external pressure source 18 enters the sealed space, it matches the elastic force of spring 6, so that valve body is in open state.

[0027] Optionally, the fuse plug 13 is in a columnar structure, and the fuse plug 13 is inserted into a cavity at one end of the intermediate body 14. In order to ensure the connection stability of the fuse plug 13, the surface of the fuse plug 13 can be provided with threads, which are matched with the threads in the cavity. Meanwhile, a sealing ring can be arranged between the cavity and the fuse plug 13, so as to improve the sealing property of the connection, effectively avoid the leakage of the pressure medium, and affect the pressure in the sealed space. The fuse plug 13 can be made of low-melting-point metal or non-metallic material. The low-melting-point metal can be low-melting-point alloy, such as Wood alloy, lead-tin alloy or bismuth-based alloy. The non-metallic material can be thermoplastic polymer material or fusible ceramic or glass, which can be selected according to specific requirements. The medium in the external pressure source 18 can be any one of oil, gas or water.

[0028] Optionally, the intermediate body 14 is internally provided with a through slot for accommodating the valve rod 15, and a sealing element is arranged between the through slot and the valve rod 15. In the state that the valve rod 15 can move up and down in the longitudinal direction, the sealing property of the space can also be ensured.

[0029] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An emergency shut-off valve, characterized in that The valve body is connected with an external pressure source, and the inductive device is connected between the valve body and the external pressure source, so that the external pressure source can cut off the valve body when the inductive device changes.

2. The emergency shut-off valve according to claim 1, characterized in that The valve body comprises a valve cover, a valve body and an intermediate body arranged between the valve cover and the valve body. The bottom of the valve cover is provided with a valve rod, the top of the valve rod is provided with a spring, the valve rod penetrates the intermediate body so that the valve flap below the valve rod is in the valve body. The upper end of the spring is provided with a pressing plate, and the upper end of the pressing plate is provided with an adjusting screw.

3. The emergency shut-off valve of claim 2, wherein The top of the adjusting screw is provided with a sheath.

4. The emergency shut-off valve of claim 2, wherein The inductive device comprises a fuse plug arranged at one end of the intermediate body, and the other end of the intermediate body is provided with a cavity connected with the external pressure source.

5. The emergency shut-off valve of claim 4, wherein The fuse plug is a columnar structure, and the fuse plug is inserted into the cavity at one end of the intermediate body.

6. The emergency shut-off valve of claim 4, wherein The fuse plug is a low-melting-point metal or non-metal material.

7. The emergency shut-off valve of claim 1, wherein The medium in the external pressure source is any one of oil, gas or water.

8. The emergency shut-off valve of claim 2, wherein, The top of the valve rod is provided with a diaphragm, the diaphragm is fixed to the upper end of the intermediate body, and the top of the intermediate body has a recessed area, the recessed area and the diaphragm and the inductive device constitute a closed space capable of accommodating the pressure medium in the external pressure source.

9. The emergency shut-off valve of claim 2, wherein, The inside of the intermediate body is provided with a through slot for accommodating the valve rod, and a sealing element is arranged between the through slot and the valve rod.

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