A leak-proof high-temperature valve based on venturi effect and a leak-proof method

Abstract

The application discloses a kind of based on Venturi effect's anti-leakage high temperature valve and imitates leakage method, belong to fluid control technical field, the composition of this anti-leakage high temperature valve includes gas collecting pipe and high temperature valve body, wherein, the two opposite ends of the outer circumferential surface of the pipe wall of gas collecting pipe are provided with opening respectively, and when high-pressure high-speed gas is passed into from one end of gas collecting pipe, negative pressure zone can be formed at opening using Venturi effect;The gas outlet end of high temperature valve body is connected with one opening of gas collecting pipe by flange, so that the inner cavity of gas collecting pipe is communicated with the inner cavity of high temperature valve;Another opening of gas collecting pipe can be connected with exhaust pipe.The anti-leakage high temperature valve based on Venturi effect solves the environmental protection and safety accident caused by high temperature gas leakage at high temperature valve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fluid control, and particularly relates to a leakage-proof high-temperature valve based on Venturi effect and a leakage-proof method. BACKGROUND

[0002] In the fluid control equipment of industrial production, the high-temperature valve is always an indispensable key component. In particular, in various industrial productions, high-temperature gas may leak from the high-temperature valve, and if the high-temperature gas is toxic, it may cause poisoning of personnel, and if the high-temperature gas is flammable and explosive, it may cause serious production accidents. Therefore, the leakage of high-temperature gas from the high-temperature valve is a major problem related to environmental management and safety management.

[0003] In the process of processing and manufacturing, considering the thermal expansion and contraction of materials, a certain fitting gap is often left between the valve plate and the inner wall of the valve body in the high-temperature valve. Although the leakage rate of high-temperature gas from the fitting gap is small when the new high-temperature valve is just put into use, the sealing performance will gradually decrease with the passage of time due to the extremely harsh use environment of the high-temperature valve, so that the leakage rate of high-temperature gas increases. Moreover, due to the special requirements of material selection and processing, the cost of the high-temperature valve will increase with the decrease of the leakage rate in the manufacturing process, so it is difficult to control the leakage rate of the high-temperature valve to the extreme without considering the cost.

[0004] Therefore, it is of great significance to solve the problem of leakage of high-temperature gas from the high-temperature valve for environmental management and safety management. SUMMARY

[0005] Therefore, the present application provides a leakage-proof high-temperature valve based on Venturi effect, which solves the problem of leakage of high-temperature gas from the high-temperature valve.

[0006] The present application adopts the following technical solutions:

[0007] A leakage-proof high-temperature valve based on Venturi effect, comprising a gas collecting pipe and a high-temperature valve body.

[0008] Two opposite ends of the outer circumferential surface of the pipe wall of the gas collecting pipe are respectively provided with openings, and when high-pressure and high-speed gas is introduced from one end of the gas collecting pipe, a negative pressure zone can be formed at the openings by using the Venturi effect.

[0009] The gas outlet end of the high-temperature valve body is connected to one opening of the gas collecting pipe through a flange, so that the inner cavity of the gas collecting pipe is in communication with the inner cavity of the high-temperature valve; and the other opening of the gas collecting pipe can be connected to an exhaust pipe.

[0010] Further, the inner cavity of the gas collecting pipe is provided with a jet plate with jet holes.

[0011] The high-pressure high-speed gas forms a negative pressure area at the opening after passing through the jet hole.

[0012] Further, the jet hole is a square hole.

[0013] Further, the gas collecting pipe is sequentially divided into an inlet section, a diffusion section, a jet section, a collection section and an outlet section along the axial direction;

[0014] The inlet section is cylindrical and used for connecting with a high-pressure gas source;

[0015] The diffusion section is a truncated pyramid or a circular truncated cone, and the small end thereof is connected with the inlet section and used for diffusing the high-pressure gas;

[0016] The jet section is square, and one end thereof is connected with the large end of the diffusion section, and the opening and the jet plate are arranged in the jet section and used for forming a negative pressure area at the opening;

[0017] The collection section is a truncated pyramid or a circular truncated cone, and the large end thereof is connected with the other end of the jet section and used for collecting the high-pressure high-speed gas and the leakage gas;

[0018] The outlet section is cylindrical, and one end thereof is connected with the small end of the collection section and used for making the high-pressure high-speed gas and the leakage gas flow out of the gas collecting pipe.

[0019] Further, the outer wall of the valve body of the high-temperature valve is wrapped with a heat preservation material.

[0020] Further, the high-temperature valve and the gas collecting pipe are made of alloy steel capable of resisting 1000℃ high temperature.

[0021] In addition, the present application also provides a leakage prevention method based on Venturi effect, which utilizes the above-mentioned high-temperature valve based on Venturi effect, and comprises the following steps:

[0022] Connecting the gas inlet end of the high-temperature valve body with the exhaust port of the exhaust equipment; and connecting the other opening of the gas collecting pipe with the exhaust pipeline;

[0023] When the valve plate of the high-temperature valve body is closed, high-pressure high-speed gas is introduced from one end of the gas collecting pipe; and when the valve plate of the high-temperature valve body is opened, the introduction of high-pressure high-speed gas into the gas collecting pipe is stopped.

[0024] Beneficial effects:

[0025] (1) the two opposite ends of the outer circumferential surface of the pipe wall of the gas collecting pipe are respectively provided with openings, and when high-pressure high-speed gas is introduced into one end of the gas collecting pipe, a negative pressure area is formed at the opening by using the Venturi effect; the gas outlet end of the high-temperature valve body is connected to one opening of the gas collecting pipe through a flange, so that the inner cavity of the gas collecting pipe is in communication with the inner cavity of the high-temperature valve body, and the other opening of the gas collecting pipe can be connected to an exhaust pipe. In this way, when the valve plate of the high-temperature valve body is opened, the high-temperature gas can be discharged from the high-temperature valve body first, then from the opening of the gas collecting pipe, and finally into the exhaust pipe connected to the other opening of the gas collecting pipe, thereby ensuring the normal operation of the high-temperature valve; when the valve plate of the high-temperature valve body is closed, the high-temperature gas leaks from the gap between the valve plate and the inner wall of the valve body, at this time, high-pressure gas is introduced into one end of the gas collecting pipe, and a negative pressure area is formed near the opening by using the Venturi effect, so that the leaked high-temperature gas is discharged from the other end of the gas collecting pipe together with the high-pressure high-speed gas, the whole device has a simple and compact structure, and the environmental protection and safety accidents caused by the leakage of high-temperature gas at the high-temperature valve are solved.

[0026] Moreover, the device has the following advantages: it can be applied to various types of high-temperature valves, and the application range is very wide; it is cheap to process and manufacture; a negative pressure area is formed by using the Venturi effect, without additional power consumption; it is a pure machining mechanism without electrical components, so the failure rate is low and the reliability is high.

[0027] (2) By arranging a jet plate with jet holes in the inner cavity of the gas collecting pipe, high-pressure high-speed gas forms a high-speed jet after passing through the jet holes with a reduced flow cross section, and a negative pressure area is formed at the opening, so that the structure is simple and compact.

[0028] (3) The outer wall of the valve body of the high-temperature valve body is wrapped with a heat preservation material, which can reduce the heat dissipation rate of the high-temperature gas.

[0029] (4) The high-temperature valve body and the gas collecting pipe are made of alloy steel that can withstand 1000℃ high temperature, so that the device can be applied to a 1000℃ operating environment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A left view of a leakage-proof high-temperature valve based on the Venturi effect provided for the embodiment of the present application;

[0031] Figure 2 A front view of a leakage-proof high-temperature valve based on the Venturi effect provided for the embodiment of the present application;

[0032] Figure 3 A top view of a leakage-proof high-temperature valve based on the Venturi effect provided for the embodiment of the present application;

[0033] Figure 4A top view of the high-temperature valve based on Venturi effect provided by the embodiment of the present application after the high-temperature valve body is removed;

[0034] Figure 5 A structure diagram of the jet plate in the high-temperature valve based on Venturi effect provided by the embodiment of the present application;

[0035] Wherein, 1-high-temperature valve body, 101-valve first flange, 102-valve plate, 103-glass fiber cotton, 104-valve second flange, 2-gas collecting pipe, 201-inlet section, 202-diffusion section, 203-jet section, 204-gas collecting pipe first flange, 205-jet plate, 206-gas collecting pipe second flange, 207-collection section, 208-outlet section, 209-opening, 3-negative pressure area. DETAILED DESCRIPTION

[0036] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0037] Embodiment one:

[0038] The embodiment provides a high-temperature valve based on Venturi effect, referring to Figures 1-5 The device is composed of the gas collecting pipe 2 and the high-temperature valve body 1 made of alloy steel such as 310S stainless steel which can withstand 1000℃ high temperature, wherein:

[0039] The two opposite ends of the outer circumferential surface of the pipe wall of the gas collecting pipe 2 are respectively provided with openings 209, and when the high-pressure high-speed gas is introduced from one end of the gas collecting pipe 2, the negative pressure area 3 can be formed at the opening 209 by using the Venturi effect, that is, the gas flow rate increases after the high-pressure high-speed gas passes through the reduced flow cross section arranged in the inner cavity of the gas collecting pipe 2, and the negative pressure area 3 is formed at the opening 209, which has an adsorption effect on the high-temperature gas leaked from the high-temperature valve body 1. The opening of the high-temperature valve body 1 can be controlled by hand, gas, electricity, hydraulic pressure or other control forms, in the embodiment, the valve plate 102 is manually switched, and when the high-temperature valve body 1 is in a closed state, the valve plate 102 has a gap with the inner wall of the valve body, the gap is 3mm in the embodiment, and the gas inlet end of the high-temperature valve body 1 can be connected with the exhaust port of the exhaust equipment (such as the furnace) through the valve first flange 101, and the gas outlet end of the high-temperature valve body 1 is connected with one opening 209 of the gas collecting pipe 2 through the valve second flange 104 and the gas collecting pipe first flange 204, that is, the gas collecting pipe first flange 204 is arranged at one opening 209 of the gas collecting pipe 2, so that the inner cavity of the gas collecting pipe 2 is communicated with the inner cavity of the high-temperature valve body 1. Moreover, the other opening 209 of the gas collecting pipe 2 can be connected with the exhaust pipeline (not shown) through the gas collecting pipe second flange 206, that is, the gas collecting pipe second flange 206 is arranged at the other opening 209 of the gas collecting pipe 2.

[0040] According to the Venturi effect principle in fluid mechanics, the high-temperature gas leaked from the high-temperature valve body 1 will be sucked into the negative pressure area 3 due to the pressure difference and discharged from the other end of the gas collecting pipe 2 together with the high-pressure high-speed gas entering the gas collecting pipe 2. In this way, when the valve plate 102 of the high-temperature valve body 1 is opened, the high-temperature gas can be discharged from the high-temperature valve body 1 by negative pressure suction, then discharged from the opening of the gas collecting pipe 2, and finally flowed into the exhaust pipe, ensuring the normal discharge of high-temperature gas in the equipment to be discharged; when the valve plate 102 of the high-temperature valve body 1 is closed, the high-temperature gas leaks from the gap between the valve plate 102 and the inner wall of the valve body, at this time, the high-pressure high-speed gas is introduced into one end of the gas collecting pipe 2, so that the negative pressure area 3 is formed near the opening 209, thereby discharging the leaked high-temperature gas together with the high-pressure high-speed gas from the other end of the gas collecting pipe 2. The whole device has a simple and compact structure, solves the environmental protection and safety accidents caused by the leakage of high-temperature gas at the high-temperature valve body 1, and has the following advantages: it can be applied to various types of high-temperature valves, and has a very wide application range; it is cheap to process and manufacture; it forms a negative pressure area by using the Venturi effect, without additional power consumption; it is a pure machining mechanism without electrical components, has a low failure rate, and has high reliability.

[0041] Specifically, in the present embodiment, the high-temperature valve body 1 is square, and the outer wall of the valve body of the high-temperature valve body 1 is wrapped with glass fiber cotton 103 as a thermal insulation material. In other embodiments, rock wool, cement, refractory bricks or other types of thermal insulation materials can also be used. The gas collecting pipe 2 is sequentially divided into an inlet section 201, a diffusion section 202, a jet section 203, a collection section 207 and an outlet section 208 along the axial direction, wherein the inlet section 201 is cylindrical and used for connecting with a high-pressure gas source; the diffusion section 202 is prismatic or circular frustum-shaped, and the small end is butted with the inlet section 201, used for diffusing the high-pressure gas entering; the jet section 203 is square, one end is butted with the large end of the diffusion section 202, two openings 209 are arranged in the jet section 203, and a reduced flow cross section is also arranged in the jet section 203, used for forming a negative pressure area at the openings 209; the collection section 207 is prismatic or circular frustum-shaped, and the large end is butted with the other end of the jet section 203, used for collecting the high-pressure high-speed gas and the leaked gas; and the outlet section 208 is cylindrical, one end is butted with the small end of the collection section 207, used for discharging the high-pressure high-speed gas and the leaked gas from the gas collecting pipe 2.

[0042] More specifically, the jet section 203 of the gas collecting pipe 2 is provided with a square jet plate 205 with square jet holes, and the high-pressure high-speed gas forms a high-speed jet after passing through the jet holes with a reduced flow cross section, and a negative pressure area 3 is formed at the openings 209. By arranging the jet plate 205 with jet holes in the inner cavity of the gas collecting pipe 2, the high-pressure high-speed gas forms a high-speed jet after passing through the jet holes, and a negative pressure area 3 is formed at the openings 209, which has a simple and compact structure.

[0043] Embodiment two:

[0044] On the basis of embodiment one, the embodiment provides a leakage prevention method using the high-temperature valve, comprising the following steps:

[0045] The gas inlet end of the high-temperature valve body 1 is connected with the exhaust port of the equipment to be exhausted; the other opening 209 of the gas collecting pipe 2 is connected with the exhaust pipe;

[0046] When the valve plate 102 of the high-temperature valve body 1 is closed, high-pressure high-speed gas (such as air) is introduced from one end of the gas collecting pipe 2, so that the gas leaked from the gap between the valve plate 102 and the inner wall of the valve body is carried by the high-pressure high-speed gas to the other end of the gas collecting pipe 2 and then discharged (or collected by other containers); when the valve plate 102 of the high-temperature valve body 1 is opened, the introduction of high-pressure high-speed gas into the gas collecting pipe 2 is stopped, so that the high-temperature gas first flows out from the gas outlet end of the valve body 1, then flows out from the opening 209 of the gas collecting pipe 2, and finally flows out from the exhaust pipe, thereby ensuring the normal exhaust of the equipment to be exhausted.

[0047] In summary, the above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A leak-proof high temperature valve based on Venturi effect, characterized in that, The gas collecting pipe and the high-temperature valve body are provided; Two opposite ends of the outer circumferential surface of the pipe wall of the gas collecting pipe are respectively provided with openings, and when high-pressure high-speed gas is introduced into one end of the gas collecting pipe, a negative pressure area is formed at the openings by using the Venturi effect; The gas outlet end of the high-temperature valve body is connected to one opening of the gas collecting pipe through a flange, so that the inner cavity of the gas collecting pipe is communicated with the inner cavity of the high-temperature valve; the other opening of the gas collecting pipe is connected to an exhaust pipe; The inner cavity of the gas collecting pipe is provided with a jet plate with jet holes; The high-pressure high-speed gas forms a negative pressure area at the openings after passing through the jet holes; In use, the gas inlet end of the high-temperature valve body is connected to the exhaust port of the equipment to be exhausted; the other opening of the gas collecting pipe is connected to the exhaust pipe; when the valve plate of the high-temperature valve body is closed, high-pressure high-speed gas is introduced into one end of the gas collecting pipe; when the valve plate of the high-temperature valve body is opened, the introduction of high-pressure high-speed gas into the gas collecting pipe is stopped.

2. A leak-proof high temperature valve based on Venturi effect as claimed in claim 1 wherein, The jet holes are square holes.

3. A leak-proof high temperature valve based on Venturi effect as claimed in claim 1 wherein, The gas collecting pipe is sequentially divided into an inlet section, a diffusion section, a jet section, a collection section and an outlet section along the axial direction; The inlet section is cylindrical and is used to connect to a high-pressure gas source; The diffusion section is a truncated prism or a truncated cone, and the small end is connected to the inlet section to diffuse the introduced high-pressure gas; The jet section is square, and one end is connected to the large end of the diffusion section; the openings and the jet plate are arranged in the jet section to form a negative pressure area at the openings; The collection section is a truncated prism or a truncated cone, and the large end is connected to the other end of the jet section to collect the high-pressure high-speed gas and the leakage gas; The outlet section is cylindrical, and one end is connected to the small end of the collection section to make the high-pressure high-speed gas and the leakage gas flow out of the gas collecting pipe.

4. A leak-proof high temperature valve based on Venturi effect according to any one of claims 1 to 3, characterized in that, The outer wall of the valve body of the high-temperature valve is wrapped with a heat preservation material.

5. A leak-proof high temperature valve based on Venturi effect according to any one of claims 1 to 3, wherein The high-temperature valve and the gas collecting pipe are made of alloy steel that can withstand a high temperature of 1000°C.

6. A method for preventing leakage based on Venturi effect, using a high-temperature valve for preventing leakage based on Venturi effect according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: The gas inlet end of the high-temperature valve body is connected to the exhaust port of the equipment to be exhausted; the other opening of the gas collecting pipe is connected to the exhaust pipe; When the valve plate of the high-temperature valve body is closed, high-pressure high-speed gas is introduced into one end of the gas collecting pipe; when the valve plate of the high-temperature valve body is opened, the introduction of high-pressure high-speed gas into the gas collecting pipe is stopped.

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