Compressed nitrogen safety protection device

Abstract

The utility model discloses a safety protection device for compressed nitrogen, which relates to the technical field of nitrogen processing and comprises a protection box, a cover plate is mounted on one side of the protection box through a hinge, and one side of the cover plate is connected with the protection box in a clamping manner. The bottom of the pressure sensor is fixedly connected with the detection table, the temperature and pressure of nitrogen can be detected through the temperature sensor and the pressure sensor respectively, so that whether the tank body breaks down or not is judged, nitrogen conveying is interrupted in time when the tank body possibly breaks down, personnel and equipment damage caused by sudden explosion of the tank body can be reduced, and safety is high; gas movement in the protection box can be accelerated through the fan, whether nitrogen leakage exists in the protection box or not is judged through the nitrogen leakage alarm, connection and separation of the detection table and the bottom of the detection pipe can be assisted through lifting of the electric push rod, and therefore the detection table and the pressure sensor can be disassembled and overhauled conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen processing, in particular to a compressed nitrogen safety protection device. Background Art

[0002] After being vaporized by the vaporizer, high-pressure liquid nitrogen is converted into high-pressure gas, and enters the buffer tank along the pipeline to provide high-pressure nitrogen for the production line. Once the liquid nitrogen tank fails, the liquid nitrogen pressure is too high, and the gas pipeline and buffer tank at the rear end of the vaporizer will also exceed the permitted pressure range. At this time, the pipeline and nitrogen buffer tank may explode because they cannot withstand the high pressure.

[0003] In the extremely low temperature conditions in winter, there is a risk that the liquid nitrogen vaporizer cannot completely vaporize the liquid nitrogen, and the unvaporized liquid nitrogen will enter the nitrogen buffer tank along the pipeline. The material of the nitrogen buffer tank is generally welded with steel. This type of material has a significant ductile-brittle transition temperature. Once the temperature is lower than its ductile-brittle transition temperature, the toughness of the tank body drops sharply. At this time, if there is no protective device between the tank body and the delivery pipeline, the tank body is prone to sudden rupture under the pressure of nitrogen, posing a major safety hazard. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when the temperature is lower than the ductile-brittle transition temperature, the toughness of the tank body decreases sharply. At this time, if no protective device is set between the tank body and the conveying pipeline, the tank body is prone to sudden rupture under the pressure of nitrogen, which poses a great safety hazard. A compressed nitrogen safety protection device is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a compressed nitrogen safety protection device, comprising a protection box, a cover plate is installed on one side of the protection box through a hinge, one side of the cover plate is snap-connected with the protection box, a detection mechanism is arranged on one side of the cover plate, the detection mechanism comprises a connecting piece, a temperature sensor and a pressure sensor, an air intake pipe is inserted through the inside of the connecting piece, one end of the air intake pipe passes through the protection box, a support frame is fixedly connected to the top of the connecting piece, the top of the support frame is fixedly connected to the protection box, a temperature sensor is fixedly connected to one side of the support frame, the bottom of the temperature sensor passes through the side wall of the air intake pipe, and a detection tube is inserted through the other end of the air intake pipe, a detection platform is overlapped at the bottom of the detection tube, and the top of the detection platform is fixedly connected to the pressure sensor.

[0006] Preferably, a sealing tube is fixedly connected to the top of the detection platform, the sealing tube is sleeved on the outside of the detection tube, and a sealing sleeve is fixedly connected to the top of the detection tube.

[0007] Preferably, a threaded rod is fixedly connected to the bottom of the detection platform, the threaded rod is connected to a horizontal bar through threads, and an electric push rod is fixedly connected to the bottom of the horizontal bar.

[0008] Preferably, a support plate is fixedly connected to the bottom of the electric push rod, a back plate is fixedly connected to one side of the support plate, and one side of the back plate is fixedly connected to the inner wall of the protective box.

[0009] Preferably, one side of the detection tube is fixedly connected to a guide tube, and one end of the guide tube passes through the side wall of the protection box.

[0010] Preferably, an electric control box is fixedly connected to one side of the protection box, and the electric control box is connected to the temperature sensor and the pressure sensor by electrical signals.

[0011] Preferably, a reinforcement piece is fixedly connected to one side of the back plate, and one side of the reinforcement piece is snap-connected to the detection tube.

[0012] Preferably, a nitrogen leakage alarm is fixedly connected to one side of the back plate, and the nitrogen leakage alarm is electrically connected to the electric control box.

[0013] Preferably, a clamping plate is clamped on one side of the protection box, and a fan is fixedly connected to the top of the inner cavity of the protection box.

[0014] Preferably, an exhaust pipe is inserted through the top of the protective box.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. In the utility model, the top of the temperature sensor is fixedly connected to the support frame, and the bottom of the pressure sensor is fixedly connected to the test bench. The temperature and pressure of the nitrogen can be detected respectively by the temperature sensor and the pressure sensor, so as to judge whether the tank body will fail. When a failure may occur, the delivery of nitrogen can be interrupted in time, which can reduce the damage to personnel and equipment caused by the sudden explosion of the tank body, and has higher safety.

[0017] 2. In the utility model, the fan and the nitrogen leakage alarm are respectively connected to the inner wall and the back plate of the protective box. The fan can be used to accelerate the gas movement inside the protective box, thereby assisting the detection of the nitrogen leakage alarm. The nitrogen leakage alarm is used to determine whether there is a nitrogen leakage inside the protective box, thereby increasing the functionality of the entire device. The lifting and lowering of the electric push rod can assist the connection and separation of the detection platform and the bottom of the detection tube, thereby facilitating the disassembly and maintenance of the detection platform and the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the cover structure of a compressed nitrogen safety protection device is provided for the utility model;

[0019] Figure 2 A schematic diagram of the installation of an exhaust pipe structure of a compressed nitrogen safety protection device is provided for the utility model;

[0020] Figure 3 A schematic diagram of the installation of a support frame structure of a compressed nitrogen safety protection device is provided for the utility model;

[0021] Figure 4 A schematic diagram of the installation structure of a reinforcement member of a compressed nitrogen safety protection device is provided for the utility model;

[0022] Figure 5 The utility model provides a schematic diagram of the installation structure of a pressure sensor of a compressed nitrogen safety protection device.

[0023] Legend: 1. Cover plate; 2. Protection box; 3. Clamping plate; 4. Electric control box; 5. Exhaust pipe; 6. Intake pipe; 7. Connector; 8. Support plate; 9. Electric push rod; 10. Guide pipe; 11. Fan; 12. Support frame; 13. Temperature sensor; 14. Nitrogen leak alarm; 15. Back plate; 16. Horizontal bar; 17. Sealing sleeve; 18. Reinforcement; 19. Test table; 20. Threaded rod; 21. Pressure sensor; 22. Test tube; 23. Sealing tube. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0026] Embodiment 1

[0027] Reference Figure 1-5As shown: a compressed nitrogen safety protection device, including a protection box 2, a cover plate 1 is installed on one side of the protection box 2 through a hinge, one side of the cover plate 1 is snap-connected with the protection box 2, a detection mechanism is arranged on one side of the cover plate 1, the detection mechanism includes a connector 7, a temperature sensor 13 and a pressure sensor 21, an air intake pipe 6 is inserted through the inside of the connector 7, one end of the air intake pipe 6 passes through the protection box 2, a support frame 12 is fixedly connected to the top of the connector 7, the top of the support frame 12 is fixedly connected to the protection box 2, a temperature sensor 13 is fixedly connected to one side of the support frame 12, the bottom of the temperature sensor 13 passes through the side wall of the air intake pipe 6, and a detection tube 22 is inserted through the other end of the air intake pipe 6, a detection platform 19 is overlapped at the bottom of the detection tube 22, the top of the detection platform 19 is fixedly connected to the pressure sensor 21, a sealing tube 23 is fixedly connected to the top of the detection platform 19, the sealing tube 23 is sleeved on the outside of the detection tube 22, and a sealing sleeve 17 is fixedly connected to the top of the detection tube 22.

[0028] The support frame 12 can be used to support the top of the connecting member 7, thereby improving the stability of the installation and use of the connecting member 7, and facilitating the installation and use of the temperature sensor 13. The temperature sensor 13 can be used to detect the nitrogen temperature inside the intake pipe 6, thereby assisting in judging whether there is an explosion risk in the tank. At the same time, the connecting member 7 can also be used to guide and support the installation of the intake pipe 6. The intake pipe 6 can guide the nitrogen discharged through the vaporizer. The sealing sleeve 17 can increase the sealing of the connection between the top of the detection tube 22 and the intake pipe 6, thereby avoiding nitrogen leakage. The sealing tube 23 can be used to wrap and protect the bottom of the detection tube 22, which can improve the sealing of the bottom of the detection tube 22 and the top of the detection platform 19, and realize the sealing protection of the upper and lower ends of the detection tube 22. The detection platform 19 can support and fix the bottom of the pressure sensor 21. The pressure sensor 21 can realize the detection of nitrogen pressure. After the nitrogen temperature and pressure structure is constructed, the nitrogen transmission data can be enriched, thereby improving the accuracy of the explosion risk judgment.

[0029] Embodiment 2

[0030] like Figure 2-Figure 5As shown, a threaded rod 20 is fixedly connected to the bottom of the detection table 19, and the threaded rod 20 is connected to a horizontal bar 16 through a thread. An electric push rod 9 is fixedly connected to the bottom of the horizontal bar 16, and a support plate 8 is fixedly connected to the bottom of the electric push rod 9. A back plate 15 is fixedly connected to one side of the support plate 8, and one side of the back plate 15 is fixedly connected to the inner wall of the protection box 2. A guide tube 10 is fixedly connected to one side of the detection tube 22, and one end of the guide tube 10 passes through the side wall of the protection box 2. An electric control box 4 is fixedly connected to one side of the protection box 2. The electric control box 4 is connected to the temperature sensor 13 and the pressure sensor 21 by electrical signals. A reinforcement piece 18 is fixedly connected to one side of the back plate 15, and one side of the reinforcement piece 18 is snap-connected to the detection tube 22. A nitrogen leak alarm 14 is fixedly connected to one side of the back plate 15, and the nitrogen leak alarm 14 is electrically connected to the electric control box 4. A snap-connecting plate 3 is snap-connected to one side of the protection box 2. A fan 11 is fixedly connected to the top of the inner cavity of the protection box 2, and an exhaust pipe 5 is inserted through the top of the protection box 2.

[0031] The threaded connection between the threaded rod 20 and the horizontal bar 16 is used to facilitate the installation and removal of the detection platform 19 on the top of the horizontal bar 16. After the detection platform 19 is removed, the pressure sensor 21 can be repaired. The electric push rod 9 can be used to adjust the use height of the horizontal bar 16, drive the horizontal bar 16 and the detection platform 19 to rise and fall, thereby assisting the bottom of the detection platform 19 to overlap with the detection tube 22, and the sealing tube 23 is sleeved on the outside of the detection tube 22. The guide tube 10 can be used to quickly discharge the detected nitrogen. The detection data of the temperature sensor 13 and the pressure sensor 21 can be quickly obtained through the electric control box 4, and the processed data can be sent to the PLC control cabinet. The reinforcement 18 can be used to support one side of the detection tube 22 to improve the stability of the detection tube 22. The nitrogen leak alarm 14 and the fan 11 can assist in the rapid detection of nitrogen leakage inside the protective box 2. When nitrogen leakage occurs, the valve on the exhaust pipe 5 is opened in time to discharge the gas.

[0032] The use method and working principle of the device: First, a one-way solenoid valve is installed on the exhaust pipe 5 and the guide pipe 10, the liquid nitrogen tank is connected to the vaporizer, and the end of the vaporizer is connected to the intake pipe 6. The liquid nitrogen is converted into nitrogen after being vaporized by the vaporizer. The nitrogen enters the intake pipe 6 and circulates inside the intake pipe 6. The right end of the guide pipe 10 is connected to the buffer tank. The temperature sensor 13 can be used to detect the nitrogen temperature inside the intake pipe 6. The nitrogen enters the detection tube 22 through the intake pipe 6. The pressure is detected by the pressure sensor 21. After the detection is completed, the valve on the guide pipe 10 is opened to discharge the nitrogen inside the detection tube 22. The alarm triggering temperature and pressure are pre-set. Once the pressure exceeds the set value or the temperature is lower than the set value, the electric control box 4 receives the detection results of the temperature sensor 13 and the pressure sensor 21, and sends a signal to the PLC control cabinet in the production line. The PLC control cabinet will automatically start the emergency cut-off valve to urgently cut off the outlet of the liquid nitrogen tank to avoid danger. At the same time, the PLC control box will emit a buzzer and light alarm to remind the operator to take measures;

[0033] The fan 11 can be used to accelerate the air flow inside the protective box 2, so that the gas can quickly contact the nitrogen leak alarm 14, thereby determining whether there is a nitrogen leak inside the protective box 2. When the entire device needs maintenance, the cover 1 is flipped down, and the electric push rod 9 is used to drive the horizontal bar 16 and the detection table 19 to move downward, and the sealing tube 23 is separated from the detection tube 22. Then, the threaded rod 20 is rotated to separate the threaded rod 20 from the horizontal bar 16, and the detection table 19 is removed from above the horizontal bar 16 to inspect the pressure sensor 21.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A compressed nitrogen safety protection device, comprising a protection box (2), a cover plate (1) being mounted on one side of the protection box (2) via a hinge, characterized in that: One side of the cover plate (1) is snap-connected with the protection box (2), and a detection mechanism is provided on one side of the cover plate (1), the detection mechanism comprising a connecting piece (7), a temperature sensor (13) and a pressure sensor (21); an air intake pipe (6) is inserted through the interior of the connecting piece (7), one end of the air intake pipe (6) passes through the protection box (2), a support frame (12) is fixedly connected to the top of the connecting piece (7), the top of the support frame (12) is fixedly connected to the protection box (2), one side of the support frame (12) is fixedly connected to the temperature sensor (13), the bottom of the temperature sensor (13) passes through the side wall of the air intake pipe (6), and a detection tube (22) is inserted through the other end of the air intake pipe (6), the bottom of the detection tube (22) is overlapped with a detection platform (19), and the top of the detection platform (19) is fixedly connected to the pressure sensor (21).

2. A compressed nitrogen safety protection device according to claim 1, characterized in that: The top of the detection platform (19) is fixedly connected to a sealing tube (23), the sealing tube (23) is sleeved on the outside of the detection tube (22), and the top of the detection tube (22) is fixedly connected to a sealing sleeve (17).

3. A compressed nitrogen safety protection device according to claim 1, characterized in that: The bottom of the detection platform (19) is fixedly connected to a threaded rod (20), the threaded rod (20) is threadedly connected to a horizontal bar (16), and the bottom of the horizontal bar (16) is fixedly connected to an electric push rod (9).

4. A compressed nitrogen safety protection device according to claim 3, characterized in that: The bottom of the electric push rod (9) is fixedly connected to a support plate (8), one side of the support plate (8) is fixedly connected to a back plate (15), and one side of the back plate (15) is fixedly connected to the inner wall of the protection box (2).

5. A compressed nitrogen safety protection device according to claim 1, characterized in that: One side of the detection tube (22) is fixedly connected to a guide tube (10), and one end of the guide tube (10) passes through the side wall of the protection box (2).

6. A compressed nitrogen safety protection device according to claim 1, characterized in that: An electric control box (4) is fixedly connected to one side of the protection box (2), and the electric control box (4) is connected to the temperature sensor (13) and the pressure sensor (21) by means of electrical signals.

7. A compressed nitrogen safety protection device according to claim 4, characterized in that: A reinforcing piece (18) is fixedly connected to one side of the back plate (15), and one side of the reinforcing piece (18) is snap-fitted and connected to the detection tube (22).

8. A compressed nitrogen safety protection device according to claim 4, characterized in that: A nitrogen leakage alarm (14) is fixedly connected to one side of the back plate (15), and the nitrogen leakage alarm (14) is electrically connected to the electric control box (4).

9. A compressed nitrogen safety protection device according to claim 1, characterized in that: A clamping plate (3) is clamped on one side of the protection box (2), and a fan (11) is fixedly connected to the top of the inner cavity of the protection box (2).

10. A compressed nitrogen safety protection device according to claim 1, characterized in that: An exhaust pipe (5) is inserted through the top of the protection box (2).

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