A fire and explosion proof device is installed at the breathing tube interface of a flammable and explosive storage tank

Abstract

A fireproof and explosion-proof device is added to the interface of the breathing tube of an inflammable and explosive storage tank, which belongs to the technical field of fuel and liquefied gas equipment. The device is characterized in that: the operating flange of the upper shell is connected with a self-closing quick connector, and the shell is divided into a common channel, a gas phase channel and a liquid phase channel. The space formed by each of them is a tubular structure, and its spatial position is a coaxial tube structure. The space formed by the gas phase channel and the liquid phase channel is a symmetrical structure. The common channel is provided with a valve core A, a steel solid filter, a core rod, and a rod spring. The gas phase channel is provided with a boundary sleeve, a boundary sleeve seal, a gas phase explosion-proof barrel, a gas phase explosion-proof core, a linkage, a valve core B, a valve core C, a valve seat, a limiter, a barrel spring, a spring seat, a retaining ring, and a core rod. The liquid phase channel is provided with a liquid phase explosion-proof core, and explosion-proof liquid inlet and explosion-proof liquid outlet are respectively provided at both ends of the boundary sleeve, and a liquid outlet control hole is provided at the lower end of the gas phase explosion-proof barrel. The beneficial effect is that the sparks generated by the liquid inlet and outlet are controlled separately, thereby solving the problem of causing explosions here.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel oil and liquefied gas production, storage and transportation equipment. Background Art

[0002] In the production, storage and transportation of flammable and explosive liquids, the rapid combustion and explosion accidents caused by static sparks or open flames during the receiving and sending operations at the inlet and outlet are a problem that cannot be ignored and cannot be prevented. The reason is that there are many reasons for the generation of static sparks, and even if prevention is carried out, there are unexpected hidden dangers. The receiving and sending operations at the inlet and outlet are frequent operations, involving many links with hidden dangers of static sparks. Therefore, it is of great significance to effectively control and eliminate the static sparks and open flames generated at the inlet and outlet so that they cannot spread and cause larger fires and explosions, which is of great significance to protecting life and property safety and maintaining normal production. For this, the current passive approach is to try not to generate static sparks and control the generation of open flames, but the treatment of accidentally generated static sparks and open flames is a blank. Summary of the invention

[0003] The purpose of the present invention is to provide a fireproof and explosion-proof device for adding a safety device to the breathing tube interface of an inflammable and explosive storage tank, so as to solve the problem of explosion caused by accidental sparks generated at the liquid inlet and outlet during the sending and receiving operation of the inflammable and explosive liquid industry.

[0004] The technical solution of the present invention is:

[0005] The upper shell and the lower shell are connected by the upper flange and the lower flange to form a shell. The operating flange of the upper shell is connected with a self-closing quick connector. The lower shell is provided with a mounting flange. The shell is divided into a common channel, a gas phase channel and a liquid phase channel. The space formed by the common channel, the gas phase channel and the liquid phase channel is a tubular structure. The spatial positions formed by the common channel, the gas phase channel and the liquid phase channel are coaxial tube structures. The space formed by the gas phase channel and the liquid phase channel is a symmetrical structure. The common channel is provided with a valve core A, a steel-solid filter, a core rod and a rod spring. The gas phase channel is provided with a boundary sleeve, a boundary sleeve seal, a gas phase explosion-proof barrel, a gas phase explosion-proof core, a linkage, a valve core B, a valve core C, a valve seat, a limiter, a barrel spring, a spring seat, a retaining ring and a core rod. The liquid phase channel is provided with a liquid phase explosion-proof core. The two ends of the boundary sleeve are respectively provided with an explosion-proof liquid inlet and an explosion-proof liquid outlet, and the lower end of the gas phase explosion-proof barrel is provided with a liquid outlet control hole.

[0006] The upper flange and the lower flange are connected to form the shell. The upper flange and the lower flange are connected at a position where, after the upper flange and the lower flange are separated, the exposed ports are the detachable liquid phase explosion-proof core and the gas phase explosion-proof barrel and the interface sleeve.

[0007] A sleeve seal is arranged inside the shell to seal the gap between the sleeve and the upper shell.

[0008] The steel filter is cup-shaped, the mesh of the steel filter is in the common channel, the upper edge of the steel filter is clamped in the gap between the upper shell operating flange and the self-closing quick connector, and the bottom of the steel filter has a hole that allows the core rod to pass through but prevents impurities from passing through. The steel filter is used to support the rod spring.

[0009] The boundary sleeve is a tubular structure installed on the pipe wall and has both an explosion-proof liquid inlet and an explosion-proof liquid outlet. The space isolation between the gas phase channel and the liquid phase channel is formed by the boundary sleeve.

[0010] The gas phase explosion-proof barrel is a tubular barrel-shaped structure placed in the gas phase channel. There is a through pipe for the core rod to pass through the gas phase explosion-proof barrel. The gas phase explosion-proof barrel is equipped with a gas phase explosion-proof core. The gas phase explosion-proof barrel is provided with fixed grids on both sides of the gas phase explosion-proof core. The gas phase explosion-proof barrel is provided with the limiters on both sides of the fixed grids. The gas phase explosion-proof barrel is provided with valve core B and valve core C and their valve seats on both sides of the limiter. The gas phase explosion-proof barrel is provided with at least one linkage device that can be linked with the valve core A or valve core B or valve core C or core rod.

[0011] The beneficial effects of the present invention are as follows: an active approach is taken to control the sparks generated at the liquid inlet and outlet respectively according to the different media and different media properties at the liquid inlet and outlet at different stages. First, the sparks in the liquid phase medium are extinguished; second, the sparks in the gas phase medium are extinguished or the flames ignited by them are weakened so that they slowly release energy and the flames cannot spread, thereby solving the problem of causing explosions here. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the closed state structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the present invention in a semi-open state;

[0014] Figure 3 It is a schematic diagram of the structure of the present invention in a fully open state. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] As shown in the figure, 1. valve core A; 2. self-closing quick connector; 3. operating flange; 4. upper shell; 5. interface sleeve seal; 6. upper flange; 7. lower flange; 8. explosion-proof liquid inlet; 9. lower shell; 10. gas phase explosion-proof core; 11. liquid phase explosion-proof core; 12. explosion-proof liquid outlet; 13. gas phase channel; 14. interface sleeve; 15. mounting flange; 16. retaining ring; 17. spring seat; 18. barrel spring; 19. valve core C; 20. liquid outlet control hole; 21. valve seat; 22. limiter; 23. liquid phase channel; 24. gas phase explosion-proof barrel; 25. valve core B; 26. linkage; 27. public channel; 28. steel solid filter; 29. ​​rod spring; 30. core rod.

[0017] The upper shell 4 and the lower shell 9 are connected to form a shell through an upper flange 6 and a lower flange 7. The operating flange 3 of the upper shell 4 is connected with a self-closing quick connector 2. The lower shell 9 is provided with a mounting flange 15. The shell is divided into a common channel 27, a gas phase channel 13 and a liquid phase channel 23. The common channel 27 is provided with a valve core A1, a steel solid filter screen 28, a core rod 30, and a rod spring 29. The gas phase channel 13 is provided with a sleeve 14, a sleeve seal 5, a gas phase explosion-proof barrel 24, a gas phase explosion-proof core 10, a linkage 26, a valve core B25, a valve core C19, a valve seat 21, a limiter 22, a barrel spring 18, a spring seat 17, a retaining ring 16, and a core rod 30. The liquid phase channel 23 is provided with a liquid phase explosion-proof core 11. The two ends of the sleeve 14 are respectively provided with an explosion-proof liquid inlet 8 and an explosion-proof liquid outlet 12. The lower end of the gas phase explosion-proof barrel 24 is provided with a liquid outlet control hole 20.

[0018] The gas phase explosion-proof barrel can be controlled by the valve core A or the valve core B or the valve core C or the core rod and move synchronously or with a delay therewith.

[0019] The gas phase explosion-proof barrel and the valve core A or valve core B or valve core C or core rod can synchronously or delayed open or close the opening of the self-closing quick connector and the opening of the space where the gas phase explosion-proof core is located when being controlled to move.

[0020] When the gas phase explosion-proof barrel is controlled to move, the closure or opening of the explosion-proof liquid inlet or the explosion-proof liquid outlet can be controlled, that is, the closure or opening of the liquid phase channel can be controlled.

[0021] The gas phase explosion-proof barrel, valve core A or valve core B or valve core C or core rod can be automatically reset by the rod spring and the barrel spring.

[0022] The valve core A or valve core B or valve core C and the core rod are connected in a detachable and adjustable manner by bolt fixation.

[0023] The liquid phase explosion-proof core can extinguish sparks in a liquid phase medium, a gas phase medium or a mixture of the two and prevent the spread of explosion heat energy, thereby preventing the occurrence of an explosion.

[0024] The liquid phase explosion-proof core has no visible deformation or corrosion after the liquid phase medium flows through it.

[0025] The gas phase explosion-proof core can extinguish sparks in the gas phase medium, weaken the ignited flame so that it slowly releases energy and prevents the flame from spreading, thereby preventing the occurrence of explosion.

[0026] The steps and process of the present invention are as follows:

[0027] 1. First, connect the mounting flange 15 to the pipeline flange of the inlet or outlet according to the relevant regulations of this industry.

[0028] 2. Replace the common quick connector on the hose to be connected with the present invention with a dry quick connector female end that can be matched with this industry.

[0029] 3. Make other preparations for receiving or sending liquids, and finally connect the female end of the dry quick connector to the self-closing quick connector 2.

[0030] 4. Explosion-proof implementation method 1: See Figure 1 , connected state, when the female end of the dry quick connector contacts the self-closing quick connector 2, assuming that sparks are generated due to external flames or contact with static electricity or collision, the self-closing quick connector 2 is closed by the valve core A and is in a closed state. At this time, the flame or spark cannot contact the flammable and explosive media in the pipeline and storage tank, so it is impossible to generate or spread flames or explosions.

[0031] 5. Explosion-proof implementation method 2: see Figure 2 , connected state, when the female end of the dry quick connector is half-inserted into the self-closing quick connector 2, due to the push of the female end push rod of the dry quick connector on the valve core A1, the valve core A1, valve core B25, and valve core C19 connected as a whole by the core rod 30 overcome the resistance of the rod spring 29 and move. At this time, due to the different set strokes, the self-closing quick connector 2 closed by the valve core A1 changes from a closed state to a semi-open state. At this time, due to the different set strokes, the valve seat 21 closed by the valve core B and the valve core C respectively is not closed, and the liquid phase channel 23 is still in a closed state. Only the common channel 27 and the gas phase channel 1 3 is connected with the outside world, pipelines, and storage tanks. The relevant space contains gaseous media. Assuming that the gaseous media at this time has reached the flammable and explosive range and unexpected static electricity and sparks occur, three states may occur: the first state is that the gas-phase explosion-proof core 10 will conduct static electricity to the shell, and then to the pipeline through the shell, and then discharge it to the ground through the pipeline; the second state is that the heat energy of the spark that contacts the gas-phase explosion-proof core 10 will be absorbed by the gas-phase explosion-proof core 10 and extinguish it; the third state is that if a flame is generated, it can only burn slowly on the surface of the gas-phase explosion-proof core 10 and cannot spread to the pipeline and storage tank.

[0032] 6. Explosion-proof implementation method 3: see Figure 3, connection state, when the female end of the dry quick connector is fully inserted into the self-closing quick connector 2, due to the continued push of the female end push rod of the dry quick connector on the valve core A1, the valve core A1, valve core B25, and valve core C19 connected as a whole by the core rod 30 overcome the resistance of the rod spring 29 and continue to move. At this time, the self-closing quick connector 2 closed by the valve core A1 is fully opened. At this time, due to the different set strokes, the ports containing the valve seat 21 respectively closed by the valve core B and the valve core C are completely closed. At this time, the gas phase channel 13 is closed. At this time, due to the different set strokes, the valve core B25 and the valve core C19 continue to push the valve seat 21 integrated with the gas phase explosion-proof barrel 24 to move, that is, push the gas phase explosion-proof barrel 24 to overcome the spring 18 and continue to move until the explosion-proof liquid inlet 8 is exposed and opened and the explosion-proof liquid outlet 12 coincides with the liquid outlet control hole 20 and opens. At this time, the liquid phase channel 23 is connected. At this time, only the common channel 27 and the liquid phase channel 23 are connected to the outside world and the pipeline. , the storage tanks are connected, at this time, the gas phase medium still exists in the relevant space, because the relevant hidden dangers have been eliminated in the previous state, it is safe at this time, so the sending and receiving operations are started. At this time, the relevant space is mainly liquid phase medium, but due to pressure, pipe diameter changes and other reasons, gas phase medium or a mixture of the two will be irregularly or occasionally produced. Assuming that unexpected static electricity and sparks occur at this time, three states may occur: the first state is that the liquid phase explosion-proof core 11 will conduct static electricity to the shell, and then conduct it to the pipeline through the shell, and then discharge it to the ground through the pipeline; the second state is that the liquid phase explosion-proof core 11 will absorb the heat energy of the spark and extinguish it; the third state is if a flame is generated, because all spaces are already in a closed state at this time, detonation may occur. When the heat energy generated by the detonation passes through the liquid phase explosion-proof core 11, the liquid phase explosion-proof core 11 will absorb the heat energy and extinguish it, so that the heat energy of the detonation cannot continue to spread and expand, thereby avoiding explosion.

[0033] 7. During the sending and receiving operation, when the liquid medium flows through the common channel 27, the particulate impurities in the liquid medium are filtered by the steel filter screen 28 and retained in the cup-shaped space thereof.

[0034] 8. After the sending and receiving operation is completed, the female end of the dry quick connector is pulled out from the present invention. At this time, the rod spring 29 is restored to its original state due to the loss of the force from the push rod of the female end of the dry quick connector, and drives the valve core A1, valve core B25, and valve core C19 connected as a whole by the core rod 30 to move. The valve core A1 closes the quick connector port. At this time, the valve core B25 and valve core C19 simultaneously open the closed ports including the valve seat 21. When the valve core B25 and valve core C19 contact the stopper 22, they stop shrinking and contacting the gas phase. The distance between the explosion-proof cores leaves a designed aperture for the gas phase medium. At this time, the gas phase channel 13 is connected. At this time, the valve core B25 pulls the gas phase explosion-proof barrel 24 to move through the linkage 26. The spring 18 reverses its movement due to the loss of the force from the gas phase explosion-proof barrel 24 until the limiter 22 contacts the steel solid filter 28 and stops moving. At this time, the explosion-proof liquid inlet 8 is blocked and closed by the gas phase explosion-proof barrel 24, and the explosion-proof liquid outlet 12 is staggered and closed with the liquid outlet control hole 20. At this time, the liquid phase channel 23 is closed, and the present invention is restored to Figure 1 status.

Claims

1. A fireproof and explosion-proof device is provided at the interface of the breathing tube of an inflammable and explosive storage tank, which is characterized by: The upper shell and the lower shell are connected by the upper flange and the lower flange to form a shell. The operating flange of the upper shell is connected with a self-closing quick connector. The lower shell is provided with a mounting flange. The shell is divided into a common channel, a gas phase channel and a liquid phase channel. The space formed by the common channel, the gas phase channel and the liquid phase channel is a tubular structure. The spatial positions formed by the common channel, the gas phase channel and the liquid phase channel are coaxial tube structures. The space formed by the gas phase channel and the liquid phase channel is a symmetrical structure. The common channel is provided with a valve core A, a steel-solid filter, a core rod and a rod spring. The gas phase channel is provided with a boundary sleeve, a boundary sleeve seal, a gas phase explosion-proof barrel, a gas phase explosion-proof core, a linkage, a valve core B, a valve core C, a valve seat, a limiter, a barrel spring, a spring seat, a retaining ring and a core rod. The liquid phase channel is provided with a liquid phase explosion-proof core. The two ends of the boundary sleeve are respectively provided with an explosion-proof liquid inlet and an explosion-proof liquid outlet, and the lower end of the gas phase explosion-proof barrel is provided with a liquid outlet control hole.

2. A fireproof and explosion-proof device is provided at the interface of the breathing tube of an inflammable and explosive storage tank as claimed in claim 1, characterized in that: The upper flange and the lower flange are connected to form the shell. The connection position of the upper flange and the lower flange is that after the upper flange and the lower flange are separated, the exposed ports are the detachable liquid phase explosion-proof core and the gas phase explosion-proof barrel and the interface sleeve. A interface sleeve seal is provided inside the shell to seal the gap between the interface sleeve and the upper shell.

3. A fireproof and explosion-proof device is provided at the interface of the breathing tube of an inflammable and explosive storage tank as claimed in claim 1, characterized in that: The steel-fixed filter screen is cup-shaped, the mesh body of the steel-fixed filter screen is in the public channel, the upper edge of the steel-fixed filter screen is clamped in the gap between the upper shell operating flange and the self-closing quick connector, and there is a hole at the bottom of the steel-fixed filter screen that allows the core rod to pass through but impurities cannot pass through, and the steel-fixed filter screen is used to support the rod spring.

4. A fireproof and explosion-proof device is provided at the interface of the breathing tube of an inflammable and explosive storage tank as claimed in claim 1, characterized in that: The boundary sleeve is a tubular structure installed on the pipe wall and has both an explosion-proof liquid inlet and an explosion-proof liquid outlet. The space isolation between the gas phase channel and the liquid phase channel is formed by the boundary sleeve.

5. A fireproof and explosion-proof device is provided at the interface of the breathing tube of an inflammable and explosive storage tank as claimed in claim 1, characterized in that: The gas phase explosion-proof barrel is a tubular barrel-shaped structure placed in the gas phase channel. There is a through pipe for the core rod to pass through the gas phase explosion-proof barrel. The gas phase explosion-proof barrel is equipped with a gas phase explosion-proof core. The gas phase explosion-proof barrel is provided with fixed grids on both sides of the gas phase explosion-proof core. The gas phase explosion-proof barrel is provided with the limiters on both sides of the fixed grids. The gas phase explosion-proof barrel is provided with valve core B and valve core C and their valve seats on both sides of the limiter. The gas phase explosion-proof barrel is provided with at least one linkage device that can be linked with the valve core A or valve core B or valve core C or core rod.

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