Automatic nitrogen protection device for stirring kettle

Abstract

The utility model discloses an automatic nitrogen protection device for a stirring kettle, which comprises a base body, a sealing cover is fixedly mounted at the upper end of the base body, a control module is fixedly mounted on the outer side of the base body, a safety valve is fixedly mounted at the upper end of the sealing cover, and an oxygen concentration sensor is fixedly mounted on the inner side of the safety valve. According to the automatic nitrogen protection device for the stirring kettle, the oxygen concentration sensor on the inner side of the sealing cover is used for detecting the oxygen concentration on the inner side of the base body, when the oxygen concentration sensor detects that the oxygen concentration on the inner side of the base body is too high, a servo motor is controlled to operate, and the output end of the servo motor drives a threaded rod to rotate; the threaded rod rotates to drive the threaded connector in threaded connection with the outer side to move upwards, the sealing plate on the outer side of the connecting plate is driven to move upwards along with the threaded connector through movement of the threaded connector, accordingly, the through groove in the inner side of the gas supply cavity block is in an open state, and at the moment, the nitrogen supply device can convey nitrogen to the inner side of the base body through the gas supply cavity block.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring kettles, in particular to a nitrogen automatic protection device for stirring kettles. Background Art

[0002] In the chemical industry, it is often necessary to stir and fuse multiple materials. During the stirring process, the fusion of reagents will produce an oxidation reaction and generate a large amount of oxygen. The nitrogen automatic protection device can effectively prevent the product from deteriorating in quality due to oxidation and corrosion. By injecting nitrogen, the device can reduce the oxygen content in the environment, thereby slowing down or preventing the oxidation process.

[0003] The invention discloses a nitrogen automatic protection device for a fluid storage tank with application number CN97202996.6, which is installed on the inner floating roof of the fluid storage tank. The inner step hole in the middle of the valve body has a hemispherical top surface, the center of which is connected to the nitrogen inlet hole, and a plurality of transverse holes are connected to the outer wall of the upper step column. A rubber sealing ball is placed in the inner step hole; a supporting rod, the upper end of which has a tray with a concave spherical surface for supporting the rubber sealing ball, and the lower end of which has a connected flat plate; the flat plate is connected to the float by passing through the valve cover downwardly with a plurality of screws; a supporting column passes through the sleeve in the center of the float. The utility model can prevent air and oil from forming an explosive mixture, eliminate the safety hazards of ignition and detonation, and reduce the losses caused by oil and gas overflow.

[0004] When the device needs to introduce nitrogen into the inside of the device for protection, the oil inside the device needs to be manually pumped out before the nitrogen can be introduced. This method not only has certain limitations, but also requires manual operation, and it is impossible to make corresponding countermeasures according to the changes inside the device in time, which can easily cause the pressure inside the device to be too high and cause an explosion.

[0005] In view of the above problems, it is urgently necessary to carry out innovative design based on the original structure of the nitrogen automatic protection device for the stirred tank. Utility Model Content

[0006] The utility model aims to provide a nitrogen automatic protection device for a stirring kettle, so as to solve the problem that the device mentioned in the above background technology has certain limitations when operating, requires manual operation, and cannot make corresponding countermeasures according to the changes inside the device in time, which easily causes the pressure value inside the device to be too large and cause explosion.

[0007] To achieve the above object, the utility model provides the following technical solution: a nitrogen automatic protection device for a stirring kettle, comprising a base, a sealing cover is fixedly installed on the upper end of the base, and a control module is fixedly installed on the outer side of the base, a safety valve is fixedly installed on the upper end of the sealing cover, and an oxygen concentration sensor is fixedly installed on the inner side of the safety valve;

[0008] It further includes: a nitrogen supply device which forms a through structure with the inner side of the base body through a gas guide pipe, and a gas supply cavity block is fixedly installed on the outer side of the gas guide pipe; a pressure relief pipe which is fixedly installed on the outer side of the base body, and the tail end of the pressure relief pipe is in a conical structure.

[0009] Preferably, a support plate is fixedly installed on the outer side of the base body, and a nitrogen supply device is fixedly installed on the upper end of the support plate; this structure can transport nitrogen to the inner side of the base body through the nitrogen supply device.

[0010] Preferably, a through groove is opened inside the gas supply cavity block, a sealing plate penetrates through the inside of the through groove, and a connecting plate is fixedly installed on the upper end of the sealing plate; this structure can control the opening state of the through groove inside the gas supply cavity block by adjusting the sealing plate.

[0011] Preferably, a servo motor is fixedly installed on the outer side of the support plate, the output end of the servo motor penetrates through the inner side of the support plate, a threaded rod is fixedly installed on the output end of the servo motor, a threaded connector is threadedly connected to the outer side of the threaded rod, and the threaded connector is fixedly installed inside the connecting plate; this structure can drive the threadedly connected threaded connector on the outer side to move up and down by rotating the threaded rod.

[0012] Preferably, pressure relief holes are equiangularly opened inside the pressure relief pipe; this structure can relieve the pressure inside the base body through the pressure relief holes.

[0013] Preferably, a sliding rod penetrates through the inside of the pressure relief pipe, a piston is fixedly installed at the head end of the sliding rod, the outer surface of the piston fits with the inner wall of the pressure relief pipe, and a limit block is fixedly installed at the tail end of the sliding rod; this structure can control the opening state of the pressure relief holes by adjusting the position of the piston.

[0014] Preferably, a telescopic spring is fixedly installed at the tail end inside the pressure relief pipe, and the tail end of the telescopic spring is connected to the outer side of the piston; this structure can make the piston reset automatically through the elastic force of the telescopic spring.

[0015] Compared with the prior art, the beneficial effect of the present utility model is that this nitrogen automatic protection device for a stirring kettle is provided with:

[0016] 1. An anti-oxidation structure. When a chemical reaction occurs inside the base body, the oxygen concentration sensor inside the sealing cover detects the oxygen concentration inside the base body. When the oxygen concentration sensor detects that the oxygen concentration inside the base body is too high, it will control the operation of the servo motor. The output end of the servo motor drives the threaded rod to rotate. The rotation of the threaded rod drives the threaded connector connected to the outside thread to move upward. The movement of the threaded connector drives the sealing plate outside the connecting plate to move upward together, so that the through groove inside the air supply cavity block is in an open state. At this time, the nitrogen supply device can transport nitrogen to the inside of the base body through the air supply cavity block. The transportation of nitrogen can reduce the oxygen concentration and reduce the risk of chemical oxidation reaction and explosion;

[0017] 2. An automatic pressure relief structure. When the pressure value inside the base body is too large, the huge pressure inside the base body will generate a reverse thrust on the piston, so that the piston squeezes the telescopic spring and slides outward along the pressure relief pipe. When the piston slides outward to a certain extent, the pressure relief hole at the end of the pressure relief pipe will communicate with the inside of the base body, so that the pressure inside the base body leaks out through the pressure relief hole. By discharging the pressure inside the base body through the pressure relief hole, the pressure inside the base body is reduced, and the explosion caused by too high pressure inside the base body is avoided. Brief Description of the Drawings

[0018] Figure 1 It is a schematic three-dimensional structure diagram of the whole utility model;

[0019] Figure 2 It is a schematic bottom view structure diagram of the sealing cover of the utility model;

[0020] Figure 3 It is a schematic front sectional view structure diagram of the air supply cavity block of the utility model;

[0021] Figure 4 It is a schematic three-dimensional structure diagram of the threaded rod of the utility model;

[0022] Figure 5 It is a schematic top sectional view structure diagram of the pressure relief pipe of the utility model;

[0023] Figure 6 It is a schematic structure diagram of the utility model after the piston moves.

[0024] In the figure: 1, base body; 2, sealing cover; 3, safety valve; 4, control module; 5, oxygen concentration sensor; 6, support plate; 7, nitrogen supply device; 8, air guide pipe; 9, air supply cavity block; 10, through groove; 11, servo motor; 12, threaded rod; 13, threaded connector; 14, connecting plate; 15, sealing plate; 16, pressure relief pipe; 17, pressure relief hole; 18, sliding rod; 19, piston; 20, limiting block; 21, telescopic spring. Detailed Description of the Embodiment

[0025] 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.

[0026] Please refer to Figures 1 - 6 , the present invention provides a technical solution: a nitrogen automatic protection device for a stirring kettle, including:

[0027] Embodiment 1: As Figures 1 - 4 shown in this technical solution, the present invention provides a technical solution: a nitrogen automatic protection device for a stirring kettle, which discloses: a base body 1, and a sealing cover 2 is fixedly installed at the upper end of the base body 1, and a control module 4 is fixedly installed on the outer side of the base body 1. A safety valve 3 is fixedly installed at the upper end of the sealing cover 2, and an oxygen concentration sensor 5 is fixedly installed inside the safety valve 3;

[0028] It further includes: a nitrogen supply device 7, which forms a through structure with the inside of the base body 1 through a gas guide pipe 8, and a gas supply cavity block 9 is fixedly installed on the outer side of the gas guide pipe 8; a pressure relief pipe 16, which is fixedly installed on the outer side of the base body 1, and the tail end of the pressure relief pipe 16 is in a conical structure;

[0029] A support plate 6 is fixedly installed on the outer side of the base body 1, and a nitrogen supply device 7 is fixedly installed at the upper end of the support plate 6; a through groove 10 is opened inside the gas supply cavity block 9, and a sealing plate 15 penetrates through the inside of the through groove 10, and a connecting plate 14 is fixedly installed at the upper end of the sealing plate 15; a servo motor 11 is fixedly installed on the outer side of the support plate 6, and the output end of the servo motor 11 penetrates through the inside of the support plate 6. A threaded rod 12 is fixedly installed at the output end of the servo motor 11, and a threaded connector 13 is threadedly connected to the outer side of the threaded rod 12, and the threaded connector 13 is fixedly installed inside the connecting plate 14;

[0030] When a chemical reaction is carried out inside the base body 1 in this structure, the oxygen concentration inside the base body 1 is detected by the oxygen concentration sensor 5 inside the sealing cover 2. When the oxygen concentration sensor 5 detects that the oxygen concentration inside the base body 1 is too high, it will control the operation of the servo motor 11. The output end of the servo motor 11 drives the threaded rod 12 to rotate. The rotation of the threaded rod 12 will drive the threaded connector 13 threadedly connected to the outer side to move upward. Through the movement of the threaded connector 13, the sealing plate 15 outside the connecting plate 14 will be driven to move upward together, so that the through groove 10 inside the gas supply cavity block 9 is in an open state. At this time, the nitrogen supply device 7 can supply nitrogen into the base body 1 through the gas supply cavity block 9. Through the supply of nitrogen, the oxygen concentration inside the base body 1 can be reduced, and the risks of chemical oxidation reaction and explosion can be reduced.

[0031] Embodiment 2: As Figure 1 , Figures 5 - 6 shown in the technical solution, the present invention provides a technical solution: a nitrogen automatic protection device for a stirring kettle, which discloses that: pressure relief holes 17 are equally angled on the inner side of the pressure relief pipe 16; a sliding rod 18 penetrates through the inner side of the pressure relief pipe 16, and a piston 19 is fixedly installed at the head end of the sliding rod 18, and the outer surface of the piston 19 fits with the inner wall of the pressure relief pipe 16, and a limiting block 20 is fixedly installed at the tail end of the sliding rod 18; a telescopic spring 21 is fixedly installed at the tail end of the inner side of the pressure relief pipe 16, and the tail end of the telescopic spring 21 is connected to the outside of the piston 19;

[0032] In this structure, when the pressure value inside the base body 1 is too large, the huge pressure inside the base body 1 will generate a reverse thrust on the piston 19 inside the pressure relief pipe 16, so that the piston 19 squeezes the telescopic spring 21 and slides outward along the pressure relief pipe 16. When the piston 19 slides outward to a certain extent (moves to the rear end of the pressure relief hole 17), the pressure relief hole 17 at the end of the pressure relief pipe 16 will communicate with the inside of the base body 1, so that the pressure inside the base body 1 is discharged through the pressure relief hole 17. By discharging the pressure inside the base body 1 through the pressure relief hole 17, the pressure inside the base body 1 is reduced, and the explosion caused by too high pressure inside the base body 1 is avoided.

[0033] The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen automatic protection device for a stirred tank, comprising a base (1), a sealing cover (2) fixedly mounted on the upper end of the base (1), a control module (4) fixedly mounted on the outer side of the base (1), a safety valve (3) fixedly mounted on the upper end of the sealing cover (2), and an oxygen concentration sensor (5) fixedly mounted on the inner side of the safety valve (3); Features: Also includes: A nitrogen supply device (7) which forms a through structure with the inner side of the base body (1) via an air guide tube (8), and a gas supply cavity block (9) is fixedly mounted on the outer side of the air guide tube (8); The pressure relief pipe (16) is fixedly mounted on the outside of the base body (1), and the tail end of the pressure relief pipe (16) is in a conical structure.

2. The nitrogen automatic protection device for a stirred tank according to claim 1, characterized in that: A support plate (6) is fixedly mounted on the outer side of the base body (1), and a nitrogen supply device (7) is fixedly mounted on the upper end of the support plate (6).

3. The nitrogen automatic protection device for a stirred tank according to claim 1, characterized in that: A through groove (10) is provided on the inner side of the air supply cavity block (9), a sealing plate (15) passes through the inner side of the through groove (10), and a connecting plate (14) is fixedly mounted on the upper end of the sealing plate (15).

4. The nitrogen automatic protection device for a stirred tank according to claim 2, characterized in that: A servo motor (11) is fixedly mounted on the outer side of the support plate (6), and an output end of the servo motor (11) passes through the inner side of the support plate (6); a threaded rod (12) is fixedly mounted on the output end of the servo motor (11), and a threaded connector (13) is threadedly connected to the outer side of the threaded rod (12), and the threaded connector (13) is fixedly mounted on the inner side of the connecting plate (14).

5. The nitrogen automatic protection device for a stirred tank according to claim 1, characterized in that: The inner side of the pressure relief pipe (16) is provided with pressure relief holes (17) at equal angles.

6. The nitrogen automatic protection device for a stirred tank according to claim 5, characterized in that: A sliding rod (18) passes through the inner side of the pressure relief pipe (16), and a piston (19) is fixedly mounted on the front end of the sliding rod (18), and the outer surface of the piston (19) is in contact with the inner wall of the pressure relief pipe (16), and a limiting block (20) is fixedly mounted on the rear end of the sliding rod (18).

7. The nitrogen automatic protection device for a stirred tank according to claim 6, characterized in that: A telescopic spring (21) is fixedly mounted on the inner tail end of the pressure relief pipe (16), and the tail end of the telescopic spring (21) is connected to the outer side of the piston (19).

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