A pressure relief device for a hydrogenation reactor

Abstract

The present invention discloses a pressure relief device for a hydrogenation reactor, which relates to the technical field of pressure relief valves and includes an external pressure relief valve and an internal pressure relief valve. The external pressure relief valve and the internal pressure relief valve are respectively fixedly assembled on the outside and inside of the hydrogenation reactor. Both the external pressure relief valve and the internal pressure relief valve are located above the hydrogenation reactor and their positions correspond exactly. Among them, the external pressure relief valve and the internal pressure relief valve work together to complete the pressure relief in the hydrogenation reactor. The present invention is a pressure relief device for a hydrogenation reactor, which realizes pressure relief by using traditional mechanical means. Its upfront investment cost and later maintenance cost are both relatively low. By setting an internal pressure relief valve inside, it plays a double insurance role in the pressure relief area. Even if the external pressure relief valve is accidentally damaged, hydrogen will not leak, and it has better safety and stability.

Description

Technical Field

[0001] The invention relates to the technical field of pressure relief valves, in particular to a pressure relief device for a hydrogenation reactor. Background Art

[0002] The hydrogenation reactor is a very important equipment in organic chemistry laboratories and actual production processes. It can be used not only as a container for hydrogenation reactions, but also in situations where liquids and gases need to be fully mixed. Before and after the reaction or during maintenance, the hydrogenation reactor needs to be depressurized to make the pressure inside and outside the hydrogenation reactor consistent.

[0003] Although the pressure relief device of the existing hydrogenation reactor can successfully complete the pressure relief, it is not equipped with a secondary insurance. When the pressure relief device is damaged by accident, there is a risk of hydrogen leakage at the pressure relief point. Hydrogen is an unstable and dangerous gas, which poses certain safety hazards. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned background technology and to provide a pressure relief device for a hydrogenation reactor.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pressure relief device for a hydrogenation reactor, comprising an external pressure relief valve and an internal pressure relief valve, wherein the external pressure relief valve and the internal pressure relief valve are respectively fixedly mounted on the outside and the inside of the hydrogenation reactor, and the external pressure relief valve and the internal pressure relief valve are both located above the hydrogenation reactor and their positions are exactly corresponding;

[0007] A pressure relief nozzle is provided on one side of the external pressure relief valve, a vertically arranged trigger core is arranged inside the external pressure relief valve, an annular reference seat is fixed on the upper end of the trigger core, a steering seat is movably assembled on the outer side of the annular reference seat through an annular slide rail, a vertically arranged screw is fixed above the steering seat, the screw is meshed with the reference frame located above the external pressure relief valve through a thread, a vertically arranged driven worm is fixed above the screw, wherein the driven worm is located outside the external pressure relief valve, a positioning seat is also fixed above the outside of the external pressure relief valve, a single-chip microcomputer is fixed on the outer side of the positioning seat, a driving motor is fixed on the inner side of the positioning seat, the rotating shaft of the driving motor is fixed to the reference shaft, the outer side of the reference shaft is interference-assembled with the upper side of the positioning seat through a bearing, and a vertically arranged active worm is fixed above the reference shaft;

[0008] A pressure relief port is formed through between the internal pressure relief valve and the external pressure relief valve. A pressure relief cover is arranged inside the internal pressure relief valve. The middle of the upper surface of the pressure relief cover is fixed to the lower part of a trigger core penetrating through the pressure relief port. An avoidance groove facing downwards is formed beside the pressure relief port. An infrared distance sensor is arranged in the avoidance groove. A horizontally arranged annular guiding disc is fixed below the pressure relief cover. The annular guiding disc is nested on guiding shafts vertically arranged and evenly distributed around the pressure relief cover. Springs are also nested on the guiding shafts below the annular guiding disc. A through hole is formed through the middle of the lower part of the internal pressure relief valve.

[0009] By adopting the above scheme, the external pressure relief valve and the internal pressure relief valve jointly act to complete the pressure relief in the hydrogenation reactor. Among them, the pressure relief nozzle is used to connect to the pipeline to assist in the transfer of hydrogen in the hydrogenation reactor. The trigger core is used to assist in triggering the opening / closing of the pressure relief cover. The annular reference seat serves as the rotation reference of the swivel seat. The annular slide rail is used to assist the rotation of the swivel seat. The swivel seat is used to share the rotation of the screw. The screw is used to assist in the connection of the driven worm. The reference frame serves as the lifting and adjusting reference of the screw. The driven worm is used to drive the rotation of the screw. The positioning seat is used for the positioning of the single-chip microcomputer and the driving motor. The single-chip microcomputer stores the feedback program of the infrared distance sensor and the control program of the driving motor. The driving motor is used to drive the rotation of the driving worm. The reference shaft serves as the rotation reference of the driving worm. The bearing is used to reduce the friction of the reference shaft. The driving worm is used to drive the rotation of the driven worm. The pressure relief port is used for pressure relief transmission. The pressure relief cover is used to block the pressure relief port. The avoidance groove is used for the avoidance of the infrared distance sensor. The infrared distance sensor is used to monitor the distance from it to the gasket in real time. A horizontally arranged annular guiding disc is fixed below the pressure relief cover. The annular guiding disc is used to assist in the guiding movement of the pressure relief cover. The guiding shaft is used to assist in the guiding movement of the guiding disc. The spring is used to push the annular guiding disc. The through hole is used for pressure relief transmission.

[0010] Preferably, with the single-chip microcomputer as the signal control and feedback center, the single-chip microcomputer is electrically connected to the infrared distance sensor and the driving motor respectively.

[0011] By adopting the above scheme, the infrared distance sensor monitors the distance from it to the gasket in real time, and feeds back the signal to the single-chip microcomputer. The single-chip microcomputer issues a control signal to the driving motor according to its feedback signal, and drives the driving worm to rotate according to the feedback signal of the infrared distance sensor.

[0012] Preferably, the detection point of the infrared distance sensor is flush with the edge of the avoidance groove.

[0013] By adopting the above solution, since the detection point of the infrared distance sensor is flush with the edge of the avoidance groove, when the infrared distance sensor monitors that the distance from it to the gasket is zero, the pressure relief cover just completely blocks the pressure relief port at this time. Based on this, the pressure relief on / off is controlled; when the infrared distance sensor monitors that the distance from it to the gasket is a positive value, it means that the pressure relief port is opened, and the larger the value, the faster the pressure relief speed.

[0014] Preferably, the driving worm is always meshed with the driven worm through teeth. Initially, the driving worm is located below the driven worm.

[0015] By adopting the above solution, the driving worm is always meshed with the driven worm through teeth. When the infrared distance sensor monitors that the distance from it to the gasket is zero, the pressure relief cover just completely blocks the pressure relief port at this time; when the infrared distance sensor monitors that the distance from it to the gasket is a positive value, it means that the pressure relief port is opened, and the larger the value, the faster the pressure relief speed. The opening condition of the pressure relief port is monitored in real time by the infrared distance sensor.

[0016] Preferably, there are multiple reference frames provided above the external pressure relief valve, and all the reference frames are hermetically meshed with the screw rod through threads.

[0017] By adopting the above solution, the sealing performance above the external pressure relief valve is enhanced to ensure its safety.

[0018] Preferably, the opening size of the pressure relief port is larger than the cross-sectional size of the trigger core and smaller than the size of the pressure relief cover.

[0019] By adopting the above solution, the opening size of the pressure relief port is larger than the cross-sectional size of the trigger core. When the pressure relief port is opened, the high-pressure gas is relieved from the pressure relief port, and the trigger core will not hinder the gas from gushing out; the opening size of the pressure relief port is smaller than the size of the pressure relief cover to ensure that the pressure relief cover can completely block the pressure relief port.

[0020] Preferably, a gasket is covered around the upper surface of the pressure relief cover, and the pressure relief cover completely seals the pressure relief port through the gasket.

[0021] By adopting the above solution, the sealing performance of the pressure relief cover at the pressure relief port is improved through the gasket.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The present invention is a pressure relief device for a hydrogenation reactor, which realizes pressure relief in a traditional mechanical manner. Its upfront investment cost and later maintenance cost are both relatively low. Inside it, an internal pressure relief valve is provided to play a dual-insurance role at the pressure relief part. Even if the external pressure relief valve is damaged accidentally, hydrogen will not leak, and it has better safety and stability. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 is Figure 2 a partial structure schematic in Figure 1 ;

[0027] Figure 4 is Figure 3 a partial enlarged view of position A in

[0028] Figure 5 is Figure 2 a partial structure schematic in Figure 2 ;

[0029] Figure 6 is Figure 2 a partial structure schematic in Figure 3 ;

[0030] Figure 7 is Figure 6 a partial enlarged view of position B in

[0031] In the figure: 1 - external pressure relief valve; 2 - internal pressure relief valve; 3 - hydrogenation reactor; 4 - pressure relief nozzle; 5 - trigger core; 6 - annular reference seat; 7 - annular slide rail; 8 - steering seat; 9 - screw; 10 - reference frame; 11 - driven worm; 12 - positioning seat; 13 - single-chip microcomputer; 14 - drive motor; 15 - reference shaft; 16 - bearing; 17 - driving worm; 18 - pressure relief port; 19 - pressure relief cover; 20 - gasket; 21 - avoidance groove; 22 - infrared distance sensor; 23 - annular guide plate; 24 - guide shaft; 25 - spring; 26 - through hole. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Specific embodiment

[0034] Please refer to Figures 1-7 , the present invention provides a technical solution:

[0035] A pressure relief device for a hydrogenation reactor, comprising an external pressure relief valve 1 and an internal pressure relief valve 2. The external pressure relief valve 1 and the internal pressure relief valve 2 are respectively fixedly assembled on the outside and inside of the hydrogenation reactor 3. The external pressure relief valve 1 and the internal pressure relief valve 2 are both located above the hydrogenation reactor 3 and their positions correspond exactly to each other;

[0036] One side of the external pressure relief valve 1 is provided with a pressure relief nozzle 4. Inside the external pressure relief valve 1, a vertically arranged trigger core 5 is provided. The upper end of the trigger core 5 is fixed with an annular reference seat 6. The outer side of the annular reference seat 6 is movably assembled with a steering seat 8 through an annular slide rail 7. Above the steering seat 8, a vertically arranged screw rod 9 is fixed. The screw rod 9 is engaged with a reference frame 10 located above the external pressure relief valve 1 through a thread. Above the screw rod 9, a vertically arranged driven worm 11 is fixed. The driven worm 11 is located outside the external pressure relief valve 1. Above the external pressure relief valve 1, a positioning seat 12 is also fixed. The outer side of the positioning seat 12 is fixed with a single-chip microcomputer 13. The inner side of the positioning seat 12 is fixed with a driving motor 14. The rotating shaft of the driving motor 14 is butt-jointed and fixed with a reference shaft 15. The outer side of the reference shaft 15 is press-fitted with the positioning seat 12 above through a bearing 16. Above the reference shaft 15, a vertically arranged driving worm 17 is fixed;

[0037] A pressure relief port 18 is provided in a through manner between the internal pressure relief valve 2 and the external pressure relief valve 1. Inside the internal pressure relief valve 2, a pressure relief cover 19 is provided. The middle of the upper surface of the pressure relief cover 19 is fixed to the lower part of the trigger core 5 penetrating through the pressure relief port 18. Next to the pressure relief port 18, a downwardly facing avoidance groove 21 is provided. An infrared distance sensor 22 is arranged in the avoidance groove 21. Below the pressure relief cover 19, a horizontally arranged annular guiding disc 23 is fixed. The annular guiding disc 23 is nested on guiding shafts 24 which are uniformly distributed around the pressure relief cover 19 and are vertically arranged. Springs 25 are also nested on the guiding shafts 24 below the annular guiding disc 23. In the middle of the lower part of the internal pressure relief valve 2, a through hole 26 is provided in a through manner.

[0038] The external pressure relief valve 1 and the internal pressure relief valve 2 work together to complete the pressure relief inside the hydrogenation reactor 3; among them, the pressure relief nozzle 4 is used to dock with the pipeline, thereby assisting in the transfer of hydrogen inside the hydrogenation reactor 3, the trigger core 5 is used to assist in triggering the opening / closing of the pressure relief cover 19, the annular reference seat 6 serves as the rotation reference of the steering seat 8, the annular slide rail 7 is used to assist the rotation of the steering seat 8, the steering seat 8 is used to share the steering of the screw 9, the screw 9 is used to assist in the connection of the driven worm 11, the reference frame 10 serves as the lifting adjustment reference of the screw 9, the driven worm 11 is used to drive the rotation of the screw 9, the positioning seat 12 is used for the positioning of the single-chip microcomputer 13 and the drive motor 14, the single-chip microcomputer 13 stores the feedback program of the infrared distance sensor 22 and the control program of the drive motor 14, the drive motor 14 is used to drive the rotation of the driving worm 17, the reference shaft 15 serves as the rotation reference of the driving worm 17, the bearing 16 is used to reduce the friction of the reference shaft 15, the driving worm 17 is used to drive the driven worm 11 to rotate, the pressure relief port 18 is used for pressure relief transportation, the pressure relief cover 19 is used for sealing the pressure relief port 18, the avoidance groove 21 is used for the avoidance of the infrared distance sensor 22, the infrared distance sensor 22 is used to monitor the distance from it to the gasket 20 in real time, a horizontally arranged annular guiding disc 23 is fixed below the pressure relief cover 19, the annular guiding disc 23 is used to assist the guiding movement of the pressure relief cover 19, the guiding shaft 24 is used to assist the guiding movement of the guiding disc 23, the spring 25 is used for the pushing of the annular guiding disc 23, and the through hole 26 is used for pressure relief transportation.

[0039] In the above, taking the single-chip microcomputer 13 as the signal control and feedback center, the single-chip microcomputer 13 is electrically connected to the infrared distance sensor 22 and the drive motor 14 respectively. The infrared distance sensor 22 monitors the distance from it to the gasket 20 in real time, and feeds back the signal to the single-chip microcomputer. The single-chip microcomputer issues a control signal to the drive motor 14 according to its feedback signal, and drives the driving worm 17 to rotate according to the feedback signal of the infrared distance sensor 22.

[0040] In the above, the detection point of the infrared distance sensor 22 is flush with the edge of the avoidance groove 21. Since the detection point of the infrared distance sensor 22 is flush with the edge of the avoidance groove 21, when the infrared distance sensor 22 monitors that the distance from it to the gasket 20 is zero, at this time the pressure relief cover 19 just completely seals the pressure relief port 18; when the infrared distance sensor 22 monitors that the distance from it to the gasket 20 is a positive value, it means that the pressure relief port 18 is opened, and the larger its value, the faster the pressure relief speed. The opening condition of the pressure relief port 18 is monitored in real time through the infrared distance sensor 22.

[0041] As described above, the driving worm 17 is always meshed with the driven worm 11 through teeth. Initially, the driving worm 17 is located below the driven worm 11. The driving worm 17 is always meshed with the driven worm 11 through teeth. When the driving worm 17 rotates, it can drive the driven worm 11 to rotate, thereby driving the screw rod 9 to rotate. Under the action of the thread, the screw rod 9 moves up and down. After sharing the steering through the steering seat 8, it drives the trigger core 5 to move up and down, thereby completing the position adjustment of the pressure relief cover 19 to control the opening / closing of the pressure relief and the pressure relief speed.

[0042] As described above, there are multiple reference frames 10 provided above the external pressure relief valve 1, and all the reference frames 10 are hermetically meshed with the screw rod 9 through threads. This enhances the sealing performance above the external pressure relief valve 1 and ensures its safety.

[0043] As described above, the opening size of the pressure relief port 18 is larger than the cross-sectional size of the trigger core 5 and smaller than the size of the pressure relief cover 19. The opening size of the pressure relief port 18 is larger than the cross-sectional size of the trigger core 5. When the pressure relief port 18 is opened, the high-pressure gas is relieved from the pressure relief port 18, and the trigger core 5 does not hinder the gas from gushing out; the opening size of the pressure relief port 18 is smaller than the size of the pressure relief cover 19, ensuring that the pressure relief cover 19 can completely block the pressure relief port 18.

[0044] As described above, a sealing gasket 20 is covered around the upper surface of the pressure relief cover 19, and the pressure relief cover 19 completely seals the pressure relief port 18 through the sealing gasket 20. The sealing performance of the pressure relief cover 19 at the pressure relief port 18 is improved through the sealing gasket 20.

[0045] The working principle of the present invention:

[0046] The pressure relief cover 19 inside the internal pressure relief valve 2 always pushes the annular guiding disc 23 under the elastic action of multiple springs 25, thereby pushing the pressure relief cover 19 to completely seal the pressure relief port 18. By setting an internal pressure relief valve inside, it plays a double-insurance role in the pressure relief area. Even if the external pressure relief valve 1 is damaged accidentally, hydrogen will not leak, and it has better safety and stability. When pressure relief is required, the driving motor 14 is controlled by the single-chip microcomputer 13 to start. The rotating shaft of the driving motor 14 drives the driving worm 17 to rotate. When the driving worm 17 rotates, it can drive the driven worm 11 to rotate, thereby driving the screw rod 9 to rotate. Under the action of the thread, the screw rod 9 moves up and down. After sharing the steering through the steering seat 8, it drives the trigger core 5 to move up and down, thereby completing the position adjustment of the pressure relief cover 19 to control the opening / closing of the pressure relief and the pressure relief speed. When the infrared distance sensor 22 monitors that the distance from it to the sealing gasket 20 is zero, at this time the pressure relief cover 19 just completely blocks the pressure relief port 18; when the infrared distance sensor 22 monitors that the distance from it to the sealing gasket 20 is a positive value, it means that the pressure relief port 18 is opened, and the larger the value, the faster the pressure relief speed. The opening situation of the pressure relief port 18 is monitored in real time through the infrared distance sensor 22.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A pressure relief device for a hydrogenation reactor, characterized in that: The invention comprises an external pressure relief valve (1) and an internal pressure relief valve (2), wherein the external pressure relief valve (1) and the internal pressure relief valve (2) are respectively fixedly mounted on the outside and the inside of the hydrogenation reactor (3), and the external pressure relief valve (1) and the internal pressure relief valve (2) are both located above the hydrogenation reactor (3) and the positions of the two are exactly corresponding; A pressure relief nozzle (4) is provided on one side of the external pressure relief valve (1), a vertically arranged trigger core (5) is arranged inside the external pressure relief valve (1), an annular reference seat (6) is fixed to the upper end of the trigger core (5), a steering seat (8) is movably assembled on the outer side of the annular reference seat (6) through an annular slide rail (7), a vertically arranged screw rod (9) is fixed above the steering seat (8), the screw rod (9) is meshed with a reference frame (10) located above the external pressure relief valve (1) through a thread, and a vertically arranged driven worm is fixed above the screw rod (9). (11), wherein the driven worm (11) is located outside the external pressure relief valve (1), a positioning seat (12) is fixed above the outside of the external pressure relief valve (1), a single chip computer (13) is fixed outside the positioning seat (12), a driving motor (14) is fixed inside the positioning seat (12), a rotating shaft of the driving motor (14) is fixedly connected to a reference shaft (15), the outer side of the reference shaft (15) is interference-fitted with the top of the positioning seat (12) through a bearing (16), and a vertically arranged active worm (17) is fixed above the reference shaft (15); A pressure relief port (18) is provided between the inner pressure relief valve (2) and the outer pressure relief valve (1). A pressure relief cover (19) is provided inside the inner pressure relief valve (2). The middle of the upper surface of the pressure relief cover (19) is fixed to the bottom of a trigger core (5) that passes through the pressure relief port (18). A downward avoidance groove (21) is provided on one side of the pressure relief port (18). An infrared distance sensor (22) is provided in the avoidance groove (21). A horizontally arranged annular guide disk (23) is fixed below the pressure relief cover (19). The annular guide disk (23) is nested on a guide shaft (24) that is evenly distributed around the pressure relief cover (19) and vertically arranged. A spring (25) located below the annular guide disk (23) is also nested on the guide shaft (24). A through hole (26) is provided in the middle of the bottom of the inner pressure relief valve (2).

2. The pressure relief device of a hydrogenation reactor according to claim 1, characterized in that: The single chip microcomputer (13) is used as a signal control and feedback center, and the single chip microcomputer (13) is electrically connected to the infrared distance sensor (22) and the driving motor (14) respectively.

3. The pressure relief device of a hydrogenation reactor according to claim 2, characterized in that: The detection point of the infrared distance sensor (22) is flush with the edge of the avoidance groove (21).

4. The pressure relief device of a hydrogenation reactor according to claim 1, characterized in that: The active worm (17) is always meshed with the driven worm (11) through teeth. Initially, the active worm (17) is located below the driven worm (11).

5. The pressure relief device of a hydrogenation reactor according to claim 1, characterized in that: A plurality of reference frames (10) are provided above the external pressure relief valve (1), and all the reference frames (10) are sealingly engaged with the screw rod (9) via threads.

6. The pressure relief device of a hydrogenation reactor according to claim 1, characterized in that: The opening size of the pressure relief port (18) is larger than the cross-sectional size of the trigger core (5) and smaller than the size of the pressure relief cover (19).

7. The pressure relief device of a hydrogenation reactor according to claim 6, characterized in that: The upper surface of the pressure relief cover (19) is covered with a gasket (20), and the pressure relief cover (19) completely seals the pressure relief port (18) through the gasket (20).

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