High-temperature-resistant safe explosion-proof gate valve

Abstract

The invention relates to the technical field of gate valves, in particular to a high-temperature-resistant safe anti-explosion gate valve which comprises a gate valve body and a pressure relief assembly, the pressure relief assembly is arranged at the bottom of the feeding end of the gate valve body, a ceramic coating is sprayed on the inner surface of the gate valve body, and the pressure relief assembly comprises a pressure relief cavity, a plug piece and a sealing block. The pressure relief cavity is formed in the inner bottom of the feeding end of the gate valve body, the plug piece is arranged in the pressure relief cavity, and the sealing block is connected to the gate valve body in a welded mode and located at the bottom of the pressure relief cavity. By means of the assembly composed of the gate valve body and the pressure relief assembly, the anti-explosion gate valve with the active pressure relief mechanism is provided for an industrial pipe network, high pressure in the gate valve body can be relieved under the condition that the high pressure is generated in the gate valve body, the pressure in the gate valve body is reduced, and the explosion possibility caused by too large pressure is reduced; and the safety of the pipe network is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, and in particular to a high-temperature resistant safety and explosion-proof gate valve. Background Art

[0002] Gate valves play a key role in industrial pipelines. They are mainly used to control and regulate the flow and pressure of fluids and to cut off and regulate pipelines. They have the characteristics of simple structure, easy operation and maintenance, and good sealing performance. They are widely used in petroleum, chemical, electric power, metallurgy and other fields, and are of great significance for ensuring the normal operation of pipeline systems.

[0003] The gate valves in existing industrial pipelines are unable to discharge or alarm due to the high internal pressure, which leads to an increased probability of explosion of pipelines and gate valves in the industrial pipelines due to excessive pressure. Therefore, a high-temperature resistant, safe and explosion-proof gate valve is proposed. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a high-temperature resistant safety explosion-proof gate valve to provide an industrial pipeline network with a set of explosion-proof gate valves with an active pressure relief mechanism, which can discharge the high pressure in the gate valve body when high pressure is generated in the gate valve body, so as to reduce the pressure in the gate valve body, reduce the possibility of explosion caused by excessive pressure, and improve the safety of the pipeline network.

[0005] The technical solution adopted by the present invention to solve the technical problem is a high temperature resistant safety explosion-proof gate valve, comprising a gate valve body and a pressure relief component, wherein the pressure relief component is arranged at the bottom of the feed end of the gate valve body, and the inner surface of the gate valve body is sprayed with a ceramic coating;

[0006] The pressure relief assembly includes a pressure relief chamber, a plug and a sealing block. The pressure relief chamber is opened at the inner bottom of the feed end of the gate valve body, the plug is arranged in the pressure relief chamber, and the sealing block is welded to the gate valve body and located at the bottom of the pressure relief chamber.

[0007] By adopting the above technical solution, a set of explosion-proof gate valves with active pressure relief mechanism is provided for industrial pipe network through the components consisting of gate valve body and pressure relief component, which can discharge the high pressure in the gate valve body when high pressure is generated in the gate valve body, so as to reduce the pressure in the gate valve body, reduce the possibility of explosion caused by excessive pressure, and improve the safety of pipe network;

[0008] Ceramic coating is used to improve the high temperature resistance of the inner wall of the gate valve body and reduce the impact of high temperature on the gate valve body.

[0009] Specifically, the pressure relief chamber is a three-way structure, a medium inlet is arranged at the top of the pressure relief chamber, a medium outlet is opened at one side of the pressure relief chamber, a through hole for plug extension and retraction is opened in the middle of the sealing block, and the bottom of the pressure relief chamber is connected with the through hole.

[0010] By adopting the above technical solution, the pressure at the feed end of the gate valve body can be discharged to the medium discharge port through the pressure relief chamber.

[0011] Specifically, a joint is provided at the bottom of the gate valve body and on one side of the sealing block, a stainless steel pipe is threadedly connected to the bottom of the joint, a pressure switch is installed on one side of the stainless steel pipe, and the detection end of the pressure switch is located in the stainless steel pipe.

[0012] Specifically, a buzzer is installed at the bottom of the gate valve body, and the output end of the pressure switch is electrically connected to the input end of the buzzer through a wire.

[0013] By adopting the above technical solution, the pressure discharged into the pressure relief chamber in the stainless steel pipe is detected by the pressure switch. After the pressure switch detects that the pressure value exceeds the pressure value set by the personnel, the buzzer will be turned on to perform an auxiliary alarm function, so that the surrounding personnel can understand and respond in time.

[0014] Specifically, the plug comprises a plug head, a tail post and a spring, wherein the tail post is connected to the bottom of the plug head, and the spring is sleeved on the tail post.

[0015] Specifically, the plug is inserted into the medium inlet, and the outer periphery is in contact with the inner wall of the medium inlet. A sealing ring is provided between the top of the plug and the inner top of the medium inlet. An annular groove is provided on the outer periphery of the plug for embedding the bottom of the sealing ring.

[0016] By adopting the above technical solution, the spring provides elastic pushing force to the plug. Through this pushing force, when the pressure in the gate valve body is lower than the elastic pressure of the spring, the plug can block the medium inlet of the pressure relief chamber, so that the gate valve body works in a normal state. When the pressure in the gate valve body is greater than the elastic pushing force of the spring on the plug, the plug will push downward to contract the spring, and at the same time the medium inlet and the medium outlet will be connected, so that the pressure in the gate valve body can be discharged through the medium outlet.

[0017] Specifically, the spring is located in the pressure relief chamber, the bottom of the tail column is inserted in the through hole, and the diameter of the through hole is smaller than the diameter of the spring.

[0018] By adopting the above technical solution, the bottom of the spring is supported by the sealing block, so that the spring will not fall off.

[0019] The beneficial effects of the present invention are as follows: through the components consisting of the gate valve body and the pressure relief component, a set of explosion-proof gate valves with an active pressure relief mechanism is provided for the industrial pipeline network, which can discharge the high pressure in the gate valve body when high pressure is generated in the gate valve body, so as to reduce the pressure in the gate valve body, reduce the possibility of explosion caused by excessive pressure, and improve the safety of the pipeline network. The spring provides elastic pushing force to the plug. Through the pushing force, when the pressure in the gate valve body is lower than the elastic pressure of the spring, the plug can block the medium inlet of the pressure relief chamber, so that the gate valve body works in a normal state. When the pressure in the gate valve body is greater than the elastic pushing force of the spring on the plug, the plug will push downward to shrink the spring, and at the same time the medium inlet and the medium outlet will be connected, so that the pressure in the gate valve body can be discharged through the medium outlet, thereby solving the problem that the gate valves in the existing industrial pipeline network cannot be discharged and alarmed due to the large internal pressure, resulting in an increased probability of explosion of the pipelines and gate valves in the industrial pipeline network due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is an overall schematic diagram of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0023] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the plug of the present invention;

[0025] In the figure: gate valve body 1, pressure relief assembly 2, pressure relief chamber 21, medium inlet 22, medium outlet 23, plug 24, plug head 241, tail column 242, spring 243, annular groove 244, sealing ring 25, sealing block 27, through hole 28, joint 29, stainless steel pipe 210, pressure switch 3, buzzer 4. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] like Figure 1-4 As shown, the high temperature resistant safety explosion-proof gate valve of the present invention comprises a gate valve body 1 and a pressure relief assembly 2, wherein the pressure relief assembly 2 is arranged at the bottom of the feed end of the gate valve body 1;

[0028] The pressure relief assembly 2 includes a pressure relief chamber 21, a plug 24 and a sealing block 27. The pressure relief chamber 21 is opened at the inner bottom of the feed end of the gate valve body 1, the plug 24 is arranged in the pressure relief chamber 21, and the sealing block 27 is welded to the gate valve body 1 and is located at the bottom of the pressure relief chamber 21.

[0029] When in use, the gate valve body 1 and the pressure relief assembly 2 provide an explosion-proof gate valve with an active pressure relief mechanism for the industrial pipeline network, which can discharge the high pressure in the gate valve body 1 when high pressure is generated in the gate valve body 1, so as to reduce the pressure in the gate valve body 1, reduce the possibility of explosion caused by excessive pressure, and improve the safety of the pipeline network.

[0030] The present invention also includes that the pressure relief chamber 21 is a three-way structure, a medium inlet 22 is provided at the top of the pressure relief chamber 21, a medium outlet 23 is provided at one side of the pressure relief chamber 21, a through hole 28 for the plug 24 to be retracted and extended is provided in the middle of the sealing block 27, and the bottom of the pressure relief chamber 21 is connected with the through hole 28.

[0031] When in use, the pressure at the feed end of the gate valve body 1 can be discharged to the medium discharge port 23 based on the pressure relief chamber 21 .

[0032] The present invention also includes that a joint 29 is provided at the bottom of the gate valve body 1 and located on one side of the sealing block 27, a stainless steel pipe 210 is threadedly connected to the bottom of the joint 29, a pressure switch 3 is installed on one side of the stainless steel pipe 210, and the detection end of the pressure switch 3 is located in the stainless steel pipe 210.

[0033] The present invention also includes that a buzzer 4 is installed at the bottom of the gate valve body 1, and the output end of the pressure switch 3 is electrically connected to the input end of the buzzer 4 through a wire.

[0034] When in use, the pressure discharged into the pressure relief chamber 21 in the stainless steel pipe 210 is detected through the pressure switch 3. After the pressure switch 3 detects that the pressure value exceeds the pressure value set by the personnel, the buzzer 4 will be turned on to perform an auxiliary alarm function, so that the surrounding personnel can understand and respond in time.

[0035] The present invention also includes that the plug 24 includes a plug head 241 , a tail post 242 and a spring 243 , the tail post 242 is connected to the bottom of the plug head 241 , and the spring 243 is sleeved on the tail post 242 .

[0036] The present invention also includes that the plug 241 is plugged into the medium inlet 22, and the outer periphery is in contact with the inner wall of the medium inlet 22, a sealing ring 25 is provided between the top of the plug 241 and the top of the medium inlet 22, and an annular groove 244 is provided on the outer periphery of the plug 241 for embedding the bottom of the sealing ring 25.

[0037] When in use, the spring 243 is used to provide elastic pushing force to the plug 241. Through this pushing force, when the pressure in the gate valve body 1 is lower than the elastic pressure of the spring 243, the plug 241 can block the medium inlet 22 of the pressure relief chamber 21, so that the gate valve body 1 works in a normal state. When the pressure in the gate valve body 1 is greater than the elastic pushing force of the spring 243 on the plug 241, the plug 241 will push downward to contract the spring 243. At the same time, the medium inlet 22 and the medium discharge port 23 will be connected, so that the pressure in the gate valve body 1 can be discharged through the medium discharge port 23.

[0038] The present invention also includes that the spring 243 is located in the pressure relief chamber 21 , the bottom of the tail column 242 is inserted into the through hole 28 , and the diameter of the through hole 28 is smaller than the diameter of the spring 243 .

[0039] When in use, the sealing block 27 is used to support the bottom of the spring 243 so that the spring 243 will not fall off.

[0040] When the present invention is in use, the two ends of the gate valve body 1 are connected to the pipelines in the industrial pipeline network, so that the two sections of the pipelines in the pipeline network that need to control the flow are connected, and a set of pressure tanks are prepared, and the pressure discharge end of the stainless steel pipe 210 is connected to the pressure tank through the pipeline to assist in recovering the pressure discharged by the pressure relief component 2, and the power supply components in the workplace provide power for the electrical mechanism in this application. During use, the spring 243 is used to provide elastic force to push the plug 241. Through this pushing force, when the pressure in the gate valve body 1 is lower than the elastic pressure of the spring 243, the plug 241 can block the medium inlet 22 of the pressure relief chamber 21, so that the gate valve body 1 works in a normal state, and in the gate valve When the pressure in the body 1 is greater than the elastic pushing force of the spring 243 on the plug 241, the plug 241 will push downward to shrink the spring 243. At the same time, the medium inlet 22 and the medium outlet 23 will be connected, so that the pressure in the gate valve body 1 can be discharged through the medium outlet 23, and the pressure can be discharged to the horizontal and vertical pressure tanks of the site through the stainless steel pipe 210. During this period, the pressure discharged into the pressure relief chamber 21 in the stainless steel pipe 210 is detected by the pressure switch 3. After the pressure switch 3 detects that the pressure value exceeds the set pressure value, the buzzer 4 will be turned on to perform an auxiliary alarm function, so as to provide timely understanding and response for surrounding personnel, reduce the probability of explosion, and improve the overall safety of industrial pipe network.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. High temperature resistant safety explosion-proof gate valve, characterized by: It comprises a gate valve body (1) and a pressure relief assembly (2), wherein the pressure relief assembly (2) is arranged at the bottom of the feed end of the gate valve body (1), and the inner surface of the gate valve body (1) is sprayed with a ceramic coating; The pressure relief assembly (2) comprises a pressure relief chamber (21), a plug (24) and a sealing block (27); the pressure relief chamber (21) is opened at the inner bottom of the feed end of the gate valve body (1); the plug (24) is arranged in the pressure relief chamber (21); the sealing block (27) is welded to the gate valve body (1) and is located at the bottom of the pressure relief chamber (21).

2. The high temperature resistant safety explosion-proof gate valve according to claim 1 is characterized in that: The pressure relief chamber (21) is a three-way structure. A medium inlet (22) is provided at the top of the pressure relief chamber (21). A medium outlet (23) is provided at one side of the pressure relief chamber (21). A through hole (28) for the plug (24) to be retracted is provided in the middle of the sealing block (27). The bottom of the pressure relief chamber (21) is connected to the through hole (28).

3. The high temperature resistant safety explosion-proof gate valve according to claim 2 is characterized in that: A joint (29) is provided at the bottom of the gate valve body (1) and located on one side of the sealing block (27); a stainless steel pipe (210) is threadedly connected to the bottom of the joint (29); a pressure switch (3) is installed on one side of the stainless steel pipe (210); and a detection end of the pressure switch (3) is located inside the stainless steel pipe (210).

4. The high temperature resistant safety explosion-proof gate valve according to claim 3 is characterized in that: A buzzer (4) is installed at the bottom of the gate valve body (1), and the output end of the pressure switch (3) is electrically connected to the input end of the buzzer (4) via a wire.

5. The high temperature resistant safety explosion-proof gate valve according to claim 4, characterized in that: The plug (24) comprises a plug head (241), a tail post (242) and a spring (243); the tail post (242) is connected to the bottom of the plug head (241), and the spring (243) is sleeved on the tail post (242).

6. The high temperature resistant safety explosion-proof gate valve according to claim 5, characterized in that: The plug (241) is plugged into the medium inlet (22), and its outer circumference is in contact with the inner wall of the medium inlet (22). A sealing ring (25) is provided between the top of the plug (241) and the top of the medium inlet (22). An annular groove (244) is provided on the outer circumference of the plug (241) for embedding the bottom of the sealing ring (25).

7. The high temperature resistant safety explosion-proof gate valve according to claim 5, characterized in that: The spring (243) is located in the pressure relief chamber (21), and the bottom of the tail column (242) is inserted into the through hole (28), and the diameter of the through hole (28) is smaller than the diameter of the spring (243).

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