Explosion-proof device for chemical reaction tank

Abstract

The present invention provides an explosion-proof device for a chemical reaction tank, which relates to the field of chemical explosion protection. The explosion-proof device for a chemical reaction tank comprises a reactor body, wherein a constant pressure tube is fixedly installed at the right end of the reactor body, the constant pressure tube is connected to the interior of the reactor body, a release tube is fixedly installed at the right end of the constant pressure tube, the constant pressure tube and the release tube are sealed, a piston ring is provided in the release tube, the left end of the piston ring is located in the constant pressure tube, a plurality of concentric pistons are provided in the piston ring, a guide tube is fixedly installed in the innermost concentric piston, the inner hole of the guide tube passes through the concentric piston, a push rod is provided in the guide tube, the push rod can slide left and right relative to the guide tube, the right end of the push rod is located on the right side of the guide tube, and a fixed sleeve is fixedly installed on the circumferential surface of the release tube. The explosion-proof device for a chemical reaction tank, by providing a release tube, a piston ring, a safety pin and a negative pressure tank, can achieve the effect of slowly releasing gas in the face of a sudden increase in air pressure, thereby preventing explosion.

Description

Technical Field

[0001] The present invention relates to the field of chemical explosion protection, in particular to an explosion protection device for a chemical reaction tank. Background Art

[0002] Reactors are broadly understood as containers for physical or chemical reactions. Through structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are achieved. Reactors are widely used in petroleum, chemical, rubber, pesticide, dye, medicine and food. They are pressure vessels used to complete processes such as vulcanization, nitration, hydrogenation, hydrocarbonization, polymerization and condensation. For example, reactors, reaction pots, decomposition pots and polymerization kettles are generally made of carbon manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloys and other composite materials.

[0003] Explosions in reactors are usually caused by excessive internal gas pressure, so in the prior art, multiple pressure gauges are generally installed above the reactor for monitoring. However, if some reactions are not well controlled, a large increase in gas will occur in a short period of time, resulting in no time to release the pressure. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an explosion-proof device for a chemical reaction tank, which solves the problems raised in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an explosion-proof device for a chemical reaction tank, comprising a reactor body, a constant pressure tube fixedly installed at the right end of the reactor body, the constant pressure tube being connected to the interior of the reactor body, a release tube fixedly installed at the right end of the constant pressure tube, the constant pressure tube and the release tube being sealed, a piston ring being provided in the release tube, the left end of the piston ring being in the constant pressure tube, a plurality of concentric pistons being provided in the piston ring, a guide tube being fixedly installed in the innermost concentric piston, the inner hole of the guide tube passing through the concentric piston, a push rod being provided in the guide tube, the push rod being able to slide left and right relative to the guide tube, the right end of the push rod being on the right side of the guide tube, a circle of fixing sleeves being fixedly installed on the circumferential surface of the release tube, a safety pin being provided in each fixing sleeve, one end of the safety pin being fixed to the fixing sleeve, the other end of the safety pin being in the release tube, the safety pin being on the right side of the piston ring, the right side surfaces of the piston ring and the plurality of concentric pistons being fixed by the safety pin, and a wedge-shaped opening being provided on the left side of the safety pin at the gap position of the plurality of concentric pistons.

[0006] A sealing cover is fixedly installed on the right end of the release tube, which seals the release tube. A warning column is installed at the center of the sealing cover, which can slide elastically left and right relative to the sealing cover. The right end of the push rod corresponds to the warning column. A lower through-tube is fixedly installed on the bottom wall of the release tube on the right side of the piston ring. The lower through-tube connects the inside and outside of the release tube. A sealing plug is inserted into the upper end of the lower through-tube, and a pin is fixedly installed on the upper surface of the sealing plug. A negative pressure tank is provided on the lower side of the release tube, and a one-way valve is fixedly installed on the right end of the negative pressure tank. A connecting pipe is fixedly installed on the upper end of the negative pressure tank, and the connecting pipe is sealed and connected to the lower through-tube.

[0007] Preferably, flanges are fixedly mounted on the right end of the constant pressure tube and the left end of the release tube, and the two are sealed by the flanges.

[0008] Preferably, a plurality of rubber rings are provided on the outer side of the piston ring, and the rubber ring is provided with a rubber ring, and the contact between the concentric pistons and the contact with the inner wall of the piston ring are both sealed sliding connections.

[0009] Preferably, the diameter of the push rod matches the inner diameter of the guide tube, and the push rod and the guide tube are sealed and slidably connected.

[0010] Preferably, the connection position between the safety pin and the fixing sleeve can seal the release tube, the number of the fixing sleeves is four, and the angle between two adjacent ones is ninety degrees.

[0011] Preferably, rubber pads are provided on the left side and circumferential position of the sealing cover, and a spring is installed at the connection position between the warning column and the sealing cover.

[0012] Preferably, the lower end of the sealing plug is a pointed structure, and the sealing plug can seal the down pipe when it is inside the down pipe.

[0013] The present invention provides an explosion-proof device for a chemical reaction tank, which has the following beneficial effects:

[0014] 1. The explosion-proof device for a chemical reaction tank is provided with a release tube, a piston ring, a safety pin and a negative pressure tank. First, the negative pressure tank needs to be evacuated into a vacuum, and the sealing plug can be close to the lower tube. Secondly, the required chemical reaction is carried out in the reactor body. If the reactor explodes, the air pressure increases instantaneously. At this time, the high-pressure gas can instantly give the piston ring and the concentric piston a large pressure, and the wedge-shaped mouth position of the safety pin can be broken under stress. After the breakage, the piston ring and the concentric piston will lose their restrictions and can move to the right. The space at the right end of the release tube can receive the gas for the first time, and the moving piston ring will hit the pin shaft. At this time, the sealing plug is opened, and the vacuum environment of the negative pressure tank can instantly absorb a large amount of gas. After absorption, the one-way valve can start to exhaust to prevent the pressure in the negative pressure tank from being too high, so that the gas can be slowly released when facing an instantaneous increase in air pressure to prevent explosion.

[0015] 2. The explosion-proof device for a chemical reaction tank is provided with a guide tube and a push rod. When the gas pressure in the reactor body increases, the pressure gauge installed thereon can be monitored first, and gas will also enter the guide tube. The high-pressure gas can cause the right end of the push rod to press the warning column. When the warning column extends to the right, it can be proved that the gas pressure in the reactor body is too high. At this time, the chemical reaction in the reactor can be shut down, achieving the effect of first predicting and inspecting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a front view of the structure of the present invention;

[0018] Figure 3 It is a partial structural diagram of the present invention;

[0019] Figure 4 It is a partial structural cross-sectional view of the present invention;

[0020] Figure 5 This is a diagram showing the internal structure of the release tube of the present invention;

[0021] Figure 6 For the present invention Figure 4 A magnified view of the structure at point A in the middle.

[0022] Among them, 1 reactor body, 2 constant pressure tube, 3 release tube, 4 piston ring, 5 concentric piston, 6 guide tube, 7 push rod, 8 fixing sleeve, 9 safety pin, 10 wedge-shaped mouth, 11 sealing cover, 12 warning column, 13 down pipe, 14 sealing plug, 15 pin shaft, 16 negative pressure tank, 17 one-way valve, 18 connecting pipe, 19 rubber ring. Implementation Method

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] An embodiment of the present invention provides an explosion-proof device for a chemical reaction tank:

[0025] like Figure 1-6As shown, it includes a reactor body 1, a constant pressure tube 2 is fixedly installed on the right end of the reactor body 1, and the constant pressure tube 2 can be installed on the reactor of the prior art. The constant pressure tube 2 is connected to the interior of the reactor body 1, and a release tube 3 is fixedly installed on the right end of the constant pressure tube 2. The release tube 3 has the same diameter as the constant pressure tube 2 and a larger diameter, which can transfer more gas at one time. The constant pressure tube 2 and the release tube 3 are sealed, and the right end of the constant pressure tube 2 and the left end of the release tube 3 are fixedly installed with flanges, and the two are sealed by the flange. A piston ring 4 is provided in the release tube 3, and the left end of the piston ring 4 is in the constant pressure tube 2. A plurality of concentric pistons 5 are provided in the piston ring 4, and a plurality of rubber rings 19 are provided on the outside of the piston ring 4. The rubber ring 19 is provided with a rubber ring. The contact between the concentric pistons 5 and the contact with the inner wall of the piston ring 4 are both sealed sliding connections. A guide tube 6 is fixedly installed in the innermost concentric piston 5, and the inner hole of the guide tube 6 passes through the concentric piston 5. A push rod 7 is provided in the guide tube 6, and the push rod 7 can be relative to the guide tube 6 slides left and right, the right end of the push rod 7 is on the right side of the guide tube 6, the diameter of the push rod 7 matches the inner diameter of the guide tube 6, the push rod 7 and the guide tube 6 are sealed and slidably connected, the circumferential surface of the release tube 3 is fixedly installed with a circle of fixing sleeves 8, and the fixing sleeves 8 are provided with safety pins 9. The connection position of the safety pins 9 and the fixing sleeves 8 can seal the release tube 3. There are four fixing sleeves 8, and the angle between the two adjacent ones is ninety degrees. The safety pins 9 are fixed to the fixing sleeves 8 by two screws. The safety pins 9 can be replaced. The safety pins 9 are made of metal and can be broken under stress. One end of the safety pin 9 is fixed to the fixing sleeve 8, and the other end of the safety pin 9 is in the release tube 3. The safety pin 9 is on the right side of the piston ring 4. The right side of the piston ring 4 and the multiple concentric pistons 5 are fixed by the safety pin 9. The left side of the safety pin 9 is at the gap position of the multiple concentric pistons 5. A wedge-shaped opening 10 is opened. The depth of the wedge-shaped opening 10 can be tested. If it is necessary to withstand greater pressure, the depth of the wedge-shaped opening 10 can be adjusted.

[0026] The right end of the release tube 3 is fixedly installed with a sealing cover 11, which seals the release tube 3. A warning column 12 is installed at the center of the sealing cover 11. A scale can be installed on the warning column 12, or an electronic warning light can be installed. The warning column 12 can slide elastically left and right relative to the sealing cover 11. Rubber pads are provided on the left and circumferential positions of the sealing cover 11. A spring is installed at the connection position between the warning column 12 and the sealing cover 11. The right end of the push rod 7 corresponds to the warning column 12. The bottom wall of the release tube 3 is fixedly installed with a lower through pipe 13 on the right side of the piston ring 4. The lower through pipe 13 is connected to the release tube 3. Inside and outside the release tube 3, a sealing plug 14 is inserted into the upper end of the lower tube 13. The lower end of the sealing plug 14 is a pointed structure. When the sealing plug 14 is inside the lower tube 13, the lower tube 13 can be sealed. A pin 15 is fixedly installed on the upper surface of the sealing plug 14. A negative pressure tank 16 is provided on the lower side of the release tube 3. A one-way valve 17 is fixedly installed on the right end of the negative pressure tank 16. The one-way valve 17 can allow the air inside the negative pressure tank 16 to go out but not inward. A connecting pipe 18 is fixedly installed on the upper end of the negative pressure tank 16. The connecting pipe 18 is sealed and connected to the lower tube 13.

[0027] When in use, first, the negative pressure tank 16 needs to be evacuated to a vacuum state, and the sealing plug 14 can be tightly attached to the lower tube. Secondly, the required chemical reaction is carried out in the reactor body 1. When the air pressure in the reactor body 1 increases, the pressure gauge installed thereon can be monitored, and the guide tube 6 will also enter the gas. The high-pressure gas can make the right end of the push rod 7 press the warning column 12. When the warning column 12 extends to the right, it can be proved that the air pressure in the reactor body 1 is too high. At this time, the chemical reaction in the reactor can be shut down. If the inside of the reactor explodes, the air pressure will instantly increase. The time increases, at this time the high-pressure gas can instantly give the piston ring 4 and the concentric piston 5 a large pressure, and the wedge-shaped mouth position of the safety pin 9 can be broken under the force. After the breakage, the piston ring 4 and the concentric piston 5 will lose their restrictions and can move to the right. The space at the right end of the release tube 3 can receive the gas for the first time, and the moving piston ring 4 will hit the pin 15. At this time, the sealing plug 14 is opened, and the vacuum environment of the negative pressure tank 16 can instantly absorb a large amount of gas. After absorption, the one-way valve 17 can start to exhaust to prevent the pressure in the negative pressure tank 16 from being too high.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof device for a chemical reaction tank, comprising a reactor body (1), characterized in that: A constant pressure tube (2) is fixedly installed on the right end of the reactor body (1), and the constant pressure tube (2) is communicated with the interior of the reactor body (1). A release tube (3) is fixedly installed on the right end of the constant pressure tube (2), and the constant pressure tube (2) and the release tube (3) are sealed. A piston ring (4) is provided in the release tube (3), and the left end of the piston ring (4) is in the constant pressure tube (2). A plurality of concentric pistons (5) are provided in the piston ring (4), and a plurality of rubber rings (19) are provided on the outside of the piston ring (4). The rubber ring (19) is provided with a rubber ring. The contact between the concentric pistons (5) and the contact with the inner wall of the piston ring (4) are all sealed sliding connections. A guide tube (6) is fixedly installed in the innermost concentric piston (5). The guide tube (6) ) passes through the concentric piston (5), a push rod (7) is provided in the guide tube (6), the push rod (7) can slide left and right relative to the guide tube (6), the right end of the push rod (7) is located on the right side of the guide tube (6), a fixed sleeve (8) is fixedly installed on the circumferential surface of the release tube (3), a safety pin (9) is provided in the fixed sleeve (8), one end of the safety pin (9) is fixed to the fixed sleeve (8), the other end of the safety pin (9) is located in the release tube (3), the safety pin (9) is located on the right side of the piston ring (4), the piston ring (4) and the right side surfaces of the plurality of concentric pistons (5) are fixed by the safety pin (9), and the left side of the safety pin (9) is located at the gap position of the plurality of concentric pistons (5) and is provided with a wedge-shaped opening (10); The right end of the release tube (3) is fixedly installed with a sealing cover (11), which seals the release tube (3). A warning column (12) is installed at the center of the sealing cover (11). The warning column (12) can slide elastically left and right relative to the sealing cover (11). The right end of the push rod (7) corresponds to the warning column (12). The bottom wall of the release tube (3) is located on the right side of the piston ring (4) and is fixedly installed with a lower tube (13). The lower tube (13) communicates with the inside and outside of the release tube (3). A sealing plug (14) is inserted into the upper end of the lower tube (13). A pin (15) is fixedly installed on the upper surface of the sealing plug (14). A negative pressure tank (16) is provided on the lower side of the release tube (3). A one-way valve (17) is fixedly installed on the right end of the negative pressure tank (16). A connecting tube (18) is fixedly installed on the upper end of the negative pressure tank (16). The connecting tube (18) is sealed and connected to the lower tube (13).

2. The explosion-proof device for a chemical reaction tank according to claim 1, characterized in that: The right end of the constant pressure tube (2) and the left end of the release tube (3) are both fixedly mounted with flanges, and the two are sealed by the flanges.

3. The explosion-proof device for a chemical reaction tank according to claim 2, characterized in that: The diameter of the push rod (7) matches the inner diameter of the guide tube (6), and the push rod (7) and the guide tube (6) are sealed and slidably connected.

4. The explosion-proof device for a chemical reaction tank according to claim 3, characterized in that: The connection position between the safety pin (9) and the fixing sleeve (8) can seal the release tube (3). There are four fixing sleeves (8), and the angle between two adjacent ones is ninety degrees.

5. The explosion-proof device for a chemical reaction tank according to claim 4, characterized in that: The left side and circumferential position of the sealing cover (11) are both provided with rubber pads, and a spring is installed at the connection position between the warning column (12) and the sealing cover (11).

6. The explosion-proof device for a chemical reaction tank according to claim 5, characterized in that: The lower end of the sealing plug (14) is a pointed end structure, and the sealing plug (14) can seal the lower through pipe (13) when it is inside the lower through pipe (13).

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