Full-automatic ultralow-temperature anti-explosion nitrogen spraying device and system

Abstract

The invention discloses a full-automatic ultralow-temperature anti-explosion nitrogen spraying device and system, and relates to the technical field of industrial cooling anti-explosion equipment.The full-automatic ultralow-temperature anti-explosion nitrogen spraying device comprises a nitrogen extraction module, a multi-stage cooling module, a spraying execution module, an intelligent control module and an anti-explosion protection module; and the PSA molecular sieve nitrogen making unit is connected with the air filtering pretreatment device through a pipeline. According to the full-automatic ultralow-temperature anti-explosion nitrogen spraying device and system, nitrogen is prepared on site through PSA molecular sieve nitrogen preparation, liquid nitrogen does not need to be stored, continuous operation is met, and cost and consumption are reduced; multi-stage cooling is matched with the adjustable spraying head, so that the cooling range is wide, and the accuracy is high; the risk of frostbite of personnel is eradicated through intelligent remote control, and safety and reliability are improved through an anti-explosion protection and alarm unit; the integrated design simplifies the process, and the emergency cut-off module and the multi-nozzle layout adapt to various industrial cooling and explosion-proof scenes and are safe and efficient.

Description

Technical Field

[0001] This invention relates to the field of industrial cooling and explosion-proof equipment technology, and in particular to a fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system. Background Technology

[0002] With the continuous development of industrial production technology, the demand for cooling in many operation scenarios such as cutting and welding is becoming increasingly urgent. Reasonable cooling measures can ensure operational accuracy, extend equipment life and reduce safety risks. At present, the commonly used cooling method on the market is liquid nitrogen tank vaporization cooling. However, this method has many significant drawbacks: the physical properties of liquid nitrogen make it extremely difficult to store, requiring dedicated high-pressure storage equipment and stringent requirements for the storage environment; liquid nitrogen is consumed quickly, resulting in high energy consumption and failing to meet the production needs of long-term continuous operation; at the same time, during the storage, handling and vaporization of liquid nitrogen, operators are extremely susceptible to contact with low-temperature liquid nitrogen, which can lead to frostbite and other safety accidents, seriously affecting the efficient operation of industrial production and personnel safety.

[0003] Currently, the solutions to the above problems are mostly to optimize liquid nitrogen storage equipment or add protective measures. However, these methods are all passive protection measures. They not only require a lot of additional investment in equipment upgrades and protective structure construction, but also cannot fundamentally solve the core problems of inconvenient liquid nitrogen storage, high energy consumption, and inability to operate continuously. At the same time, they also have limitations in ensuring the safety of operators, resulting in significant safety hazards and efficiency bottlenecks in cooling operations in industrial production. Summary of the Invention

[0004] The main objective of this invention is to provide a fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system includes a nitrogen extraction module, a multi-stage cooling module, a spraying execution module, an intelligent control module, and an explosion-proof protection module. The nitrogen extraction module adopts a PSA molecular sieve nitrogen generator unit, which is connected to an air filtration pretreatment device through a pipeline. The multi-stage cooling module includes a primary heat exchanger, a secondary refrigeration unit, and a low-temperature storage buffer tank connected in series. The input end of the primary heat exchanger is connected to the nitrogen output end of the PSA molecular sieve nitrogen generator, and the low-temperature storage buffer tank is equipped with a temperature sensor. The spray execution module includes a high-pressure delivery pump, a spray pipe and several spray heads. The input end of the high-pressure delivery pump is connected to a low-temperature storage buffer tank and the output end is connected to the spray pipe. The spray heads are evenly distributed on the spray pipe and are equipped with flow regulating valves and angle regulating mechanisms. The intelligent control module includes a central controller, a remote control terminal, a temperature detection unit, a pressure detection unit, and a safety alarm unit. The temperature detection unit is connected to the temperature sensor signal of the multi-stage cooling module. The pressure detection units are respectively installed on the output end of the nitrogen extraction module, the pipelines of the multi-stage cooling module, and the spray execution module. The central controller is electrically connected to the nitrogen extraction module, the multi-stage cooling module, the spray execution module, and the safety alarm unit. The remote control terminal interacts with the central controller through a wireless communication module. The explosion-proof protection module includes an explosion-proof housing, an inert gas protection chamber, and a leak detection sensor. The core components of the nitrogen extraction module, the multi-stage cooling module, and the control elements of the intelligent control module are all encapsulated within the explosion-proof housing. The inert gas protection chamber is connected to the secondary output terminal of the nitrogen extraction module. The leak detection sensor is located inside the explosion-proof housing and is connected to the safety alarm unit signal.

[0006] Preferably, the nitrogen purity of the PSA molecular sieve nitrogen generator is adjustable within the range of 95%-99.99%, and the nitrogen production flow rate is 0.5-50 m³ / h. 3 / h.

[0007] Preferably, the cooling range of the multi-stage cooling module is from 0℃ to -120℃, the first-stage heat exchanger is a plate heat exchanger, the second-stage refrigeration unit is a cascade refrigeration system, and its refrigerant is an environmentally friendly low-temperature refrigerant.

[0008] Preferably, the volume of the cryogenic storage buffer tank is 1-10 m³. 3 The inner wall of the tank is equipped with an insulation layer made of polyurethane foam.

[0009] Preferably, the spray head adopts a universal adjustable structure, with the spray angle adjustable range of 0°-120° and the spray flow rate adjustable range of 5-50L / min.

[0010] Preferably, the central controller of the intelligent control module is a PLC programmable logic controller, which supports switching between automatic and manual control, and the remote control terminal is a mobile APP or computer client.

[0011] Preferably, the safety alarm unit includes an audible and visual alarm and an SMS alarm module, and the explosion-proof enclosure has a protection level of not less than IP65 and an explosion-proof rating of ExdIIBT4Gb.

[0012] A fully automatic cryogenic explosion-proof nitrogen spraying system includes a fully automatic cryogenic explosion-proof nitrogen spraying device as described in any one of claims 1 to 7, and further includes an external pipeline, an emergency shut-off module, and a solenoid valve connected to the spraying device. The external pipeline is sequentially connected to the nitrogen extraction module, the multi-stage cooling module, and the spray execution module. The emergency shut-off module is electrically connected to the intelligent control module. The solenoid valve is located on the external pipeline and is electrically connected to the intelligent control module.

[0013] Preferably, the spray execution module has multiple spray heads, which are spaced apart on the spray pipe, and the resulting spray area covers the entire working surface.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system uses a nitrogen extraction module with PSA molecular sieve to produce nitrogen. It utilizes the 78% nitrogen content in the air as raw material to achieve on-site production and immediate supply of nitrogen. There is no need to store liquid nitrogen, which fundamentally solves the problem of inconvenient liquid nitrogen storage. Moreover, nitrogen is inexhaustible and can meet the needs of long-term continuous operation, while significantly reducing energy consumption and operating costs.

[0015] This fully automatic ultra-low temperature explosion-proof nitrogen spray device and system, through the design of multi-stage cooling modules, adopts a combination of primary heat exchange and secondary cascade refrigeration to accurately achieve a wide range of cooling from 0℃ to -120℃. It can match the personalized cooling needs of different working scenarios, with high cooling efficiency and good temperature stability. With the universal adjustable structure of the spray head and the flexible adjustment function of flow and angle, it can accurately spray and cool working parts of different shapes and locations, with a wide range of applications and better cooling effect.

[0016] This fully automatic ultra-low temperature explosion-proof nitrogen spray device and system, through the cooperation of intelligent control module and remote control terminal, realizes unmanned remote operation of the system. Operators do not need to come into close contact with the work area and the low temperature nitrogen, completely eliminating the occurrence of safety accidents such as frostbite, greatly ensuring the personal safety of operators. In addition, the setting of explosion-proof protection module and safety alarm unit gives the system excellent explosion-proof performance and comprehensive safety monitoring capabilities, which can effectively deal with various safety risks in industrial operation environment, promptly detect and handle abnormal situations, and significantly improve the safety and reliability of system operation.

[0017] This fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system achieves integrated operation of nitrogen generation, cooling, spraying, control, and explosion protection through the coordinated cooperation of various modules. It eliminates the need for additional nitrogen storage equipment, simplifies the operation process, and reduces equipment investment costs. The emergency cut-off module further enhances the system's safety redundancy, enabling rapid cut-off of risk sources in sudden emergencies to minimize losses. The rational layout of multiple nozzles and intelligent control of solenoid valves ensure the accuracy and efficiency of cooling operations, making it suitable for various industrial cutting, welding, and other operation scenarios requiring cooling and explosion protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the extended connection of the fully automatic ultra-low temperature explosion-proof nitrogen spray system of the present invention; Figure 3 This is a diagram showing the core module structure of the fully automatic ultra-low temperature explosion-proof nitrogen spray device of the present invention; Figure 4 This is a diagram illustrating the structure of the multi-stage cooling module of the present invention; Figure 5 This is a schematic diagram of the spray execution module of the present invention; Figure 6 This is a diagram illustrating the structure of the intelligent control module of the present invention.

[0019] In the diagram: 1. Nitrogen extraction module; 101. PSA molecular sieve nitrogen generator; 102. Air filtration pretreatment device; 2. Multi-stage cooling module; 201. Primary heat exchanger; 202. Secondary refrigeration unit; 203. Low-temperature storage buffer tank; 204. Temperature sensor; 205. Insulation layer; 3. Spray execution module; 301. High-pressure transfer pump; 302. Spray pipe; 303. Spray head; 304. Flow regulating valve; 305. Angle adjustment mechanism; 4. Intelligent control module; 401. Central controller; 402. Remote control terminal; 403. Temperature detection unit; 404. Pressure detection unit; 405. Safety alarm unit; 406. Wireless communication module; 5. Explosion-proof protection module; 501. Explosion-proof shell; 502. Inert gas protection chamber; 503. Leakage detection sensor; 6. Emergency shut-off module; 7. External pipeline; 8. Solenoid valve. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Example 1, as Figures 1 to 6As shown, a fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system, in terms of overall structure, the device includes a nitrogen extraction module 1, a multi-stage cooling module 2, a spraying execution module 3, an intelligent control module 4, and an explosion-proof protection module 5. The intelligent control module 4 is electrically connected to each functional module to realize the overall coordinated control of the system. The explosion-proof protection module 5 encapsulates and protects the core components to ensure explosion-proof performance. The nitrogen extraction module 1 employs a PSA molecular sieve nitrogen generator 101. This unit is connected to an air filtration pretreatment device 102 via pipeline. The air filtration pretreatment device 102 is sequentially equipped with a pre-filter, a medium-efficiency filter, a high-efficiency oil removal filter, and a dryer. After pretreatment to remove impurities, oil mist, and moisture, the outside air enters the PSA molecular sieve nitrogen generator 101. High-purity nitrogen is produced through the adsorption and separation action of the molecular sieve. The nitrogen purity can be adjusted between 95% and 99.99% according to operational requirements, and the nitrogen production flow rate is 0.5-50 m³ / h. 3 / h, to meet the nitrogen supply needs of operations of different scales; The multi-stage cooling module 2 includes a primary heat exchanger 201, a secondary refrigeration unit 202, and a low-temperature storage buffer tank 203 connected in series. The primary heat exchanger 201 is a plate heat exchanger that performs preliminary heat exchange and cooling with the ambient temperature nitrogen output from the nitrogen extraction module 1. The nitrogen then enters the secondary refrigeration unit 202, which is a cascade refrigeration system that uses an environmentally friendly low-temperature refrigerant to further cool the nitrogen to the target temperature. The cooling range is 0℃ to -120℃. The cooled low-temperature nitrogen is stored in the low-temperature storage buffer tank 203. The insulation layer 205 on the inner wall of the tank is made of polyurethane foam to reduce cold loss. The temperature sensor 204 monitors the temperature inside the tank in real time and feeds it back to the intelligent control module 4. The spray execution module 3 includes a high-pressure delivery pump 301, a spray pipe 302, and several spray heads 303. The input end of the high-pressure delivery pump 301 is connected to the low-temperature storage buffer tank 203, and the output end is connected to the spray pipe 302. The spray heads 303 are evenly distributed on the spray pipe 302. The spray heads 303 adopt a universal adjustable structure and are equipped with a flow regulating valve 304 and an angle adjusting mechanism 305. The spray angle adjustment range is 0°-120°, and the spray flow rate adjustment range is 5-50L / min. It can be flexibly adjusted according to the shape of the working area and the cooling requirements. The intelligent control module 4 includes a central controller 401, a remote control terminal 402, a temperature detection unit 403, a pressure detection unit 404, and a safety alarm unit 405. The central controller 401 adopts a PLC programmable logic controller, supporting automatic and manual control switching. The temperature detection unit 403 is connected to the temperature sensor 204 of the multi-stage cooling module 2. The pressure detection unit 404 is respectively installed on the output end of the nitrogen extraction module 1, the pipelines of the multi-stage cooling module 2, and the spray execution module 3, for real-time monitoring of the pressure of each pipeline. The remote control terminal 402 interacts with the central controller 401 through a wireless communication module 406, and can realize the start and stop of the system, parameter adjustment, and status monitoring through a mobile APP or computer client. The safety alarm unit 405 includes an audible and visual alarm and an SMS alarm module. When the system experiences situations such as substandard nitrogen purity, abnormal temperature, excessive pressure, or gas leakage, it will promptly issue an alarm signal and send an SMS reminder to the designated contact person. The explosion-proof protection module 5 includes an explosion-proof housing 501, an inert gas protection chamber 502, and a leak detection sensor 503. The core components of the nitrogen extraction module 1, the multi-stage cooling module 2, and the control elements of the intelligent control module 4 are all encapsulated within the explosion-proof housing 501. The explosion-proof housing 501 has a protection level of not less than IP65 and an explosion-proof rating of ExdIIBT4Gb, making it suitable for industrial operation scenarios in explosive gas environments. The inert gas protection chamber 502 is connected to the secondary output end of the nitrogen extraction module 1, continuously introducing a small amount of nitrogen to maintain a positive pressure environment and prevent external explosive gases from entering. The leak detection sensor 503 is located inside the explosion-proof housing 501 and is connected to the safety alarm unit 405 to monitor nitrogen leakage in real time.

[0022] Example 2, as Figures 1 to 6 As shown, a fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system also includes an external pipeline 7 connected to the spraying device. The external pipeline 7 is sequentially connected to the nitrogen extraction module 1, the multi-stage cooling module 2 and the spraying execution module 3 for nitrogen transportation. The system also includes an emergency shut-off module 6, which is electrically connected to the intelligent control module 4. In case of an emergency, it can automatically or manually shut off the power and gas supply to the nitrogen extraction module 1, the multi-stage cooling module 2, and the spray execution module 3 to prevent the danger from escalating. An electromagnetic valve 8 is installed on the external pipeline 7 to control the opening and closing of the external pipeline 7. The electromagnetic valve 8 is electrically connected to the intelligent control module 4 and can automatically start and stop according to work instructions and safety monitoring data. To ensure that there are no dead spots in cooling, the spray execution module 3 has multiple nozzles 303. The multiple nozzles 303 are distributed at intervals on the spray pipe 302, and the spray area formed by the multiple nozzles 303 can cover the entire working surface, which is suitable for working scenarios of different sizes and shapes.

[0023] It should be noted that this invention is a fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system. In use, the required parameters such as nitrogen purity, cooling temperature, spray flow rate, and spray angle are first set via the remote control terminal 402. The central controller 401 then activates the nitrogen extraction module 1. Outside air, after pretreatment by the air filtration pretreatment device 102, enters the PSA molecular sieve nitrogen generator unit 101 to produce high-purity nitrogen. The nitrogen then enters the multi-stage cooling module 2, undergoes initial cooling by the primary heat exchanger 201 and deep cooling by the secondary refrigeration unit 202, and reaches the set temperature for storage in a low-temperature storage unit. Inside the buffer tank 203, the central controller 401 controls the solenoid valve 8 to open according to the work instructions, starts the high-pressure delivery pump 301, and delivers low-temperature nitrogen through the spray pipe 302 to the spray head 303 for precise spraying and cooling of the work area. During the operation, the intelligent control module 4 monitors the system's temperature, pressure, nitrogen purity and other parameters in real time, and the leak detection sensor 503 of the explosion-proof protection module 5 monitors for gas leaks. When an abnormality occurs, the safety alarm unit 405 will sound an alarm in time. In case of an emergency, the emergency cut-off module 6 can automatically or manually cut off the power supply and gas circuit to ensure work safety.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system, comprising a nitrogen extraction module (1), a multi-stage cooling module (2), a spraying execution module (3), an intelligent control module (4), and an explosion-proof protection module (5), characterized in that: The nitrogen extraction module (1) adopts a PSA molecular sieve nitrogen generator (101), which is connected to the air filtration pretreatment device (102) through a pipeline; The multi-stage cooling module (2) includes a first-stage heat exchanger (201), a second-stage refrigeration unit (202), and a low-temperature storage buffer tank (203) connected in series. The input end of the first-stage heat exchanger (201) is connected to the nitrogen output end of the PSA molecular sieve nitrogen generator (101), and the low-temperature storage buffer tank (203) is equipped with a temperature sensor (204). The spray execution module (3) includes a high-pressure delivery pump (301), a spray pipe (302) and several spray heads (303). The input end of the high-pressure delivery pump (301) is connected to the low-temperature storage buffer tank (203), and the output end is connected to the spray pipe (302). The spray heads (303) are evenly distributed on the spray pipe (302), and the spray heads (303) are equipped with a flow regulating valve (304) and an angle adjusting mechanism (305). The intelligent control module (4) includes a central controller (401), a remote control terminal (402), a temperature detection unit (403), a pressure detection unit (404), and a safety alarm unit (405). The temperature detection unit (403) is connected to the temperature sensor (204) of the multi-stage cooling module (2). The pressure detection unit (404) is respectively installed on the output end of the nitrogen extraction module (1), the multi-stage cooling module (2), and the spray execution module (3). The central controller (401) is electrically connected to the nitrogen extraction module (1), the multi-stage cooling module (2), the spray execution module (3), and the safety alarm unit (405). The remote control terminal (402) interacts with the central controller (401) through the wireless communication module (406). The explosion-proof protection module (5) includes an explosion-proof housing (501), an inert gas protection chamber (502), and a leak detection sensor (503). The core components of the nitrogen extraction module (1), the multi-stage cooling module (2), and the control elements of the intelligent control module (4) are all encapsulated in the explosion-proof housing (501). The inert gas protection chamber (502) is connected to the secondary output end of the nitrogen extraction module (1). The leak detection sensor (503) is located inside the explosion-proof housing (501) and is connected to the safety alarm unit (405).

2. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The nitrogen purity of the PSA molecular sieve nitrogen generator (101) is adjustable from 95% to 99.99%, and the nitrogen production flow rate is 0.5-50 m³ / h. 3 / h.

3. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The cooling range of the multi-stage cooling module (2) is 0℃ to -120℃. The first-stage heat exchanger (201) adopts a plate heat exchanger, and the second-stage refrigeration unit (202) is a cascade refrigeration system with an environmentally friendly low-temperature refrigerant as its working fluid.

4. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The volume of the cryogenic storage buffer tank (203) is 1-10 m³. 3 The inner wall of the tank is provided with a heat insulation layer (205) made of polyurethane foam.

5. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The spray head (303) adopts a universal adjustable structure, with a spray angle adjustment range of 0°-120° and a spray flow rate adjustment range of 5-50L / min.

6. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The central controller (401) of the intelligent control module (4) adopts a PLC programmable logic controller, which supports automatic control and manual control switching, and the remote control terminal (402) is a mobile APP or computer client.

7. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 1, characterized in that: The safety alarm unit (405) includes an audible and visual alarm and an SMS alarm module. The explosion-proof enclosure (501) has a protection level of not less than IP65 and an explosion-proof rating of ExdIIBT4Gb.

8. A fully automatic ultra-low temperature explosion-proof nitrogen spraying system, characterized in that: The device includes a fully automatic cryogenic explosion-proof nitrogen spraying device as described in any one of claims 1 to 7, and further includes an external pipeline (7), an emergency shut-off module (6), and a solenoid valve (8) connected to the spraying device. The external pipeline (7) is sequentially connected to the nitrogen extraction module (1), the multi-stage cooling module (2) and the spray execution module (3). The emergency cut-off module (6) is electrically connected to the intelligent control module (4). The solenoid valve (8) is located on the external pipeline (7) and is electrically connected to the intelligent control module (4).

9. The fully automatic ultra-low temperature explosion-proof nitrogen spraying device and system according to claim 2, characterized in that: The spray execution module (3) has multiple spray heads (303), which are distributed at intervals on the spray pipe (302) and form a spray area that covers the entire working surface.

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