Nitrogen heating system

Abstract

The present application relates to the technical field of nitrogen heating, and in particular to a nitrogen heating system, including a nitrogen heating body, a control box and an adjustment mounting frame; the nitrogen heating body includes a vertically arranged heating unit, a nitrogen channel is arranged inside the heating unit, a cold nitrogen inlet is arranged on the top outer side of the heating unit, a hot nitrogen pipeline is arranged at the bottom of the heating unit, a high-temperature ball valve and a one-way valve are arranged on the hot nitrogen pipeline, a temperature-controlling thermocouple is arranged on one side of the hot nitrogen pipeline, the temperature-controlling thermocouple is located between the high-temperature ball valve and the heating unit, a turbojet fitting is arranged at the output end of the hot nitrogen pipeline, a temperature measuring unit is arranged on the bottom outer side of the heating unit, the bottom of the hot nitrogen pipeline is fixed on the adjustment mounting frame, and the control box includes a circuit control module and a gas path control module. The present application is not easy to cause toxic gas backflow leakage inside the pipeline, reduces the risk of gas leakage of the nitrogen heating body, is more convenient to install and adjust, and improves the effect of temperature stability and safety.

Description

Technical Field

[0001] The present application relates to the technical field of nitrogen heating, and in particular to a nitrogen heating system. Background Art

[0002] The HOT N2 system is mainly used to generate powder and improve the blockage problem of hot nitrogen exhaust pipes. It is suitable for environmental protection, chemical industry, bio-industry and agriculture. The HOT N2 system minimizes the generation of by-products by injecting heated nitrogen (N2) into the pipe.

[0003] After searching, the Chinese patent with application number: 202223568052.8 discloses a semiconductor waste gas treatment equipment pipeline anti-blocking system, including a nitrogen heater, the air inlet of the nitrogen heater is connected to the nitrogen source, and the air outlet is connected to the air intake module, and the two ends of the air intake module are connected to the air intake pipeline of the general waste gas treatment equipment. A temperature control port is arranged at the outlet position of the air intake module, and a temperature sensor is arranged in the temperature control port. The air intake module includes a pipeline, a jacket and an air intake pipe, and the two ends of the pipeline are connected to the air intake pipeline of the general waste gas treatment equipment. The jacket is sealed at the inlet position of the pipeline, and the temperature control port is arranged at the outlet position of the pipeline. The air inlet of the air intake pipe is connected to the nitrogen heater, and the air outlet is connected to the jacket. A plurality of through holes are evenly arranged on the outer wall of the pipeline to which the jacket is sealed.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following technical defects that need to be improved:

[0005] The temperature sensor of common heating bodies is usually installed directly on the air intake module (i.e., the side spray position), which is located on the connection port of the pump equipment. If there is air leakage or the screws are loose during connection, it is easy to cause toxic gas leakage inside the pipeline, which is very dangerous. Moreover, the installation position of common heating bodies is difficult to fix and adjust, which is not conducive to installation according to the actual situation of the construction site. Summary of the invention

[0006] The present application provides a nitrogen heating system to improve the following technical problems:

[0007] The temperature sensor of common heating bodies is usually installed directly on the air intake module (i.e., the side spray position), which is located on the connection port of the pump equipment. If there is air leakage or the screws are loose during connection, it is easy to cause toxic gas leakage inside the pipeline, which is very dangerous. Moreover, the installation position of common heating bodies is difficult to fix and adjust, which is not conducive to installation according to the actual situation of the construction site.

[0008] The present application provides a nitrogen heating system, which adopts the following technical solution:

[0009] A nitrogen heating system comprises a nitrogen heating body, a control box and an adjustment mounting frame;

[0010] The nitrogen heating body comprises a vertically arranged heating unit, a nitrogen channel is arranged inside the heating unit, a cold nitrogen inlet is arranged on the outer side of the top of the heating unit, a hot nitrogen pipeline is arranged at the bottom of the heating unit, a high-temperature ball valve and a one-way valve are arranged on the hot nitrogen pipeline, a temperature-controlling thermocouple is arranged on one side of the hot nitrogen pipeline, the temperature-controlling thermocouple is located between the high-temperature ball valve and the heating unit, a turbojet fitting is arranged at the output end of the hot nitrogen pipeline, the one-way valve is located between the turbojet fitting and the high-temperature ball valve, a temperature measuring unit is arranged on the outer side of the bottom of the heating unit, the one-way valve is used to prevent gas from flowing back to the heating unit, and the turbojet fitting is connected to the airflow pipeline of the jet equipment;

[0011] The bottom of the hot nitrogen pipeline is fixed on the adjustment mounting frame, and the adjustment mounting frame is used to adjust the horizontal position, vertical height and direction of the nitrogen heating body;

[0012] The control box includes a circuit control module and a gas circuit control module. The gas circuit control module is connected to the cold nitrogen inlet and the high-temperature ball valve to control the size and on-off of the gas output. The circuit control module is connected to the heating unit, the temperature-control thermocouple, and the temperature measuring unit to control the heating temperature, heating time, and opening and closing of the nitrogen.

[0013] In an achievable technical solution of the present application, the hot nitrogen pipeline includes a vertical pipe, a bent pipe and a transverse pipe, the vertical pipe is arranged along the central axis of the heating unit and connected to the bottom of the heating unit, the bent pipe is connected between the bottom of the vertical pipe and the transverse pipe, the turbojet accessory is arranged at the end of the transverse pipe away from the transverse pipe, the high-temperature ball valve is arranged on the vertical pipe, the temperature-controlling thermocouple is arranged on the outside of the vertical pipe, and the one-way valve is arranged on the transverse pipe.

[0014] In an achievable technical solution of the present application, the temperature measuring unit includes a temperature measuring thermocouple and a plurality of thermal springs, the thermal springs are connected to the outer side of the bottom of the heating unit, and the plurality of thermal springs are installed inside a box body, the temperature measuring thermocouple is connected to the bottom of the box body and is in thermal contact with the thermal springs inside.

[0015] In an achievable technical solution of the present application, the heating unit includes an insulating outer sleeve, a heating rod and a flange seal, the heating rod is installed inside the insulating outer sleeve and the central axes of the two coincide, a wiring control terminal is provided on the top of the heating rod, the wiring control terminal is located outside the insulating outer sleeve, and the flange seal is installed on the top of the insulating outer sleeve.

[0016] In an achievable technical solution of the present application, the heating rod is provided with a spiral fin located inside the thermal insulation outer sleeve, and the outer diameter of the spiral fin is between 50-60 mm, and the length of the heating rod inside the thermal insulation outer sleeve is between 300-450 mm.

[0017] In an achievable technical solution of the present application, the turbojet accessory is arranged vertically, and the transverse pipe is vertically connected to the bottom side of the turbojet accessory, and the diameters of the air inlet and the air outlet of the turbojet accessory are between 30-45 mm.

[0018] In an achievable technical solution of the present application, the adjustment mounting frame includes a fixed chassis, a column, a first adjustment member, a transverse support rod, a second adjustment member, a vertical support rod, a locking member and an L-shaped pipe support, the bottom of the column is vertically connected to the fixed chassis, the first adjustment member is vertically slidably assembled on the column and can be locked and fixed, the transverse support rod is horizontally slidably assembled on the first adjustment member and can be locked and fixed, the second adjustment member is horizontally slidably assembled on the transverse support rod and can be locked and fixed, the vertical support rod is vertically slidably assembled on the second adjustment member and can be locked and fixed, the L-shaped pipe support is vertically slidably assembled on the vertical support rod through the locking member and can be locked and fixed, and the nitrogen heating body fixed on the L-shaped pipe support is located obliquely above the second adjustment member.

[0019] In an achievable technical solution of the present application, the first adjusting member includes a first sleeve and a second sleeve vertically connected, the first sleeve is slidably mounted on the column, the second sleeve is slidably mounted on the transverse support rod, the first sleeve is locked and fixed to the column by multiple groups of first adjusting bolts, and the second sleeve is locked and fixed to the transverse support rod by multiple groups of second adjusting bolts.

[0020] In an achievable technical solution of the present application, the second adjusting member includes a third sleeve and a fourth sleeve vertically connected, the third sleeve is slidably mounted on the vertical support rod, the fourth sleeve is slidably mounted on the transverse support rod, the third sleeve is locked and fixed to the vertical support rod by multiple sets of third adjusting bolts, and the fourth sleeve is locked and fixed to the transverse support rod by multiple sets of fourth adjusting bolts.

[0021] In an achievable technical solution of the present application, the front of the control box door is provided with a touch screen, a row of power-on display lights, a row of power-on knobs, an alarm buzzer, an alarm indicator light, a buzzer knob and an emergency stop button; the interior of the control box is provided with a main control switch, a leakage protector, a safety relay, a fuse, a contactor, a power line bus, a 24V switching power supply, a 24V terminal bus, a solid-state relay, a main control box, a PID control box, a gas circuit control unit, an external terminal bus and a ground bus.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] After the cold nitrogen enters the heating unit, it is heated and heated. When the gas is discharged, the temperature of the hot nitrogen is detected by the temperature-control thermocouple, and the temperature signal is fed back to the control box. After the system determines, the appropriate heating power is output, and the heated nitrogen passes through the high-temperature ball valve and the one-way valve, and finally enters the pipeline through the vortex jet accessories; when the nitrogen heating body needs to be closed, the high-temperature ball valve can be closed first to prevent the gas inside the pipeline from flowing back into the nitrogen heating body, or when the nitrogen heating body suddenly becomes abnormal or the gas source is interrupted, the one-way valve can also effectively prevent the gas inside the pipeline from flowing back into the nitrogen heating body, which is double protection;

[0024] The temperature-control thermocouple is installed at the front end of the one-way valve and near the air outlet at the bottom of the heating unit. This position is far away from the connection port of the pump equipment, that is, far away from the turbojet accessories. The turbojet accessories and the temperature-control thermocouple are also blocked by a one-way valve and a high-temperature ball valve. Even if the turbojet accessories leak or the screws are loose when connected to the pipeline, it is not easy to cause toxic gas backflow leakage inside the pipeline, thereby reducing the risk of gas leakage of the nitrogen heating body.

[0025] Moreover, the nitrogen heater can be stably installed by adjusting the mounting frame. The horizontal position, vertical height and direction of the nitrogen heater can also be adjusted at will according to the actual situation of the construction site, making installation and adjustment more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the nitrogen heating system of an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the nitrogen heating body in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the front structure of the adjustable mounting frame in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the side structure of the adjustable mounting frame in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the front structure of the control box in the embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the internal structure of the control box in the embodiment of the present application.

[0033] Figure 7 This is the overall power-on logic diagram of the nitrogen heating system of the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100, nitrogen heating body; 11, heating unit; 111, insulation outer sleeve; 112, heating rod; 113, flange seal; 12, cold nitrogen inlet; 13, hot nitrogen pipeline; 131, vertical pipe; 132, elbow; 133, horizontal pipe; 14, high-temperature ball valve; 15, one-way valve; 16, temperature control thermocouple; 17, turbojet accessories; 18, temperature measuring unit; 181, temperature measuring thermocouple; 182, thermal spring; 183, box body;

[0036] 200, adjustment mounting frame; 21, fixed chassis; 22, column; 23, first adjustment member; 231, first sleeve; 232, second sleeve; 233, first adjustment bolt; 234, second adjustment bolt; 24, horizontal support rod; 25, second adjustment member; 251, third sleeve; 252, fourth sleeve; 253, third adjustment bolt; 254, fourth adjustment bolt; 26, vertical support rod; 27, locking member; 271, locking sleeve; 272, locking bolt; 28, L-shaped pipe support; 281, first concave arc plate; 2811, first fixing hole; 282, second concave arc plate; 2821, second fixing hole; 29, reinforcement plate;

[0037] 300, control box; 301, touch screen; 302, power-on indicator light; 303, power-on knob; 304, alarm buzzer; 305, alarm indicator light; 306, buzzer knob; 307, emergency stop button; 308, main control switch; 309, leakage protector; 310, safety relay; 311, fuse; 312, contactor; 313, power line row; 314, 24V switching power supply; 315, 24V terminal block; 316, solid-state relay; 317, main control box; 318, PID control box; 319, gas circuit control unit; 3191, solenoid valve; 3192, flow control valve; 3193, flow meter; 320, external terminal block and ground row. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific position, be constructed and operate in a specific position, and therefore should not be understood as limiting the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] The following is combined with Figure 1-7 This application is described in further detail.

[0043] The present application embodiment discloses a nitrogen heating system. Figure 1-7 , the nitrogen heating system includes a nitrogen heating body 100, a control box 300 and an adjustment mounting frame 200;

[0044] The nitrogen heating body 100 includes a vertically arranged heating unit 11, a nitrogen channel is arranged inside the heating unit 11, a cold nitrogen inlet 12 is arranged on the top outer side of the heating unit 11, a hot nitrogen pipeline 13 is arranged at the bottom of the heating unit 11, a high-temperature ball valve 14 and a one-way valve 15 are arranged on the hot nitrogen pipeline 13, a temperature-controlling thermocouple 16 is arranged on one side of the hot nitrogen pipeline 13, the temperature-controlling thermocouple 16 is located between the high-temperature ball valve 14 and the heating unit 11, a turbojet fitting 17 is arranged at the output end of the hot nitrogen pipeline 13, the one-way valve 15 is located between the turbojet fitting 17 and the high-temperature ball valve 14, a temperature measuring unit 18 is arranged on the bottom outer side of the heating unit 11, the one-way valve 15 is used to prevent the gas from flowing back to the heating unit 11, and the turbojet fitting 17 is connected to the airflow pipeline of the jet device;

[0045] The bottom of the hot nitrogen pipeline 13 is fixed on the adjustment mounting frame 200, and the adjustment mounting frame 200 is used to adjust the horizontal position, vertical height and direction of the nitrogen heating body 100;

[0046] The control box 300 includes a circuit control module and a gas circuit control module. The gas circuit control module is connected to the cold nitrogen inlet 12 and the high-temperature ball valve 14 to control the size and on-off of the gas output. The circuit control module is connected to the heating unit 11, the temperature control thermocouple 16, and the temperature measuring unit 18 to control the heating temperature, heating time and opening and closing of the nitrogen.

[0047] In this embodiment, the hot nitrogen pipeline 13 includes a vertical pipe 131, a bent pipe 132 and a transverse pipe 133. The vertical pipe 131 is arranged along the central axis of the heating unit 11 and connected to the bottom of the heating unit 11. The bent pipe 132 is connected between the bottom of the vertical pipe 131 and the transverse pipe 133. The turbojet fitting 17 is arranged at the end of the transverse pipe 133 away from the transverse pipe 133. The high-temperature ball valve 14 is arranged on the vertical pipe 131. The temperature control thermocouple 16 is arranged on the outer side of the vertical pipe 131. The one-way valve 15 is arranged on the transverse pipe 133.

[0048] The temperature control thermocouple 16 is placed at the lower end of the heating unit 11. In addition to safety, the gas flow rate at the lower end of the gas outlet of the heating unit 11 is slower, the test temperature is more accurate and stable, and the temperature control is more precise and stable.

[0049] In this embodiment, the temperature measuring unit 18 includes a temperature measuring thermocouple 181 and a plurality of thermal springs 182. The thermal springs 182 are connected to the outside of the bottom of the heating unit 11, and the plurality of thermal springs 182 are installed inside a box body 183. The temperature measuring thermocouple 181 is connected to the bottom of the box body 183 and is in thermal contact with the internal thermal springs 182.

[0050] When the nitrogen heating body 100 is working normally, the temperature-controlling thermocouple 16 controls the temperature, and the temperature measuring unit 18 only plays a monitoring and protection role and does not participate in direct temperature control. When an abnormal situation occurs in the temperature-controlling thermocouple 16, resulting in overcharging, the temperature measuring thermocouple 181 detects that the temperature exceeds the set threshold, and the system alarms and disconnects the system heating. If an abnormality occurs in the system and direct intervention is required, the temperature of the thermal spring 182 reaches the threshold, and the heating output will be physically cut off, forcing the heating to stop, thereby avoiding dangerous or serious overcharging and other problems. The above-mentioned dual thermocouple design is safer.

[0051] The heating unit 11 includes a thermal insulation outer sleeve 111 and a heating rod 112. The heating rod 112 is installed inside the thermal insulation outer sleeve 111 and the central axes of the two coincide. A wiring control terminal is provided on the top of the heating rod 112, and the wiring control terminal is located outside the thermal insulation outer sleeve 111. The heating unit 11 also includes a flange seal 113 installed on the top of the thermal insulation outer sleeve 111. The thermal insulation outer sleeve 111 not only has a thermal insulation effect, but also has a good protective effect on the internal heating rod 112.

[0052] The heating rod 112 is provided with a spiral fin located inside the heat-insulating outer sleeve 111, and the outer diameter of the spiral fin is between 50-60 mm, and the length of the heating rod 112 located inside the heat-insulating outer sleeve 111 is between 300-450 mm. Compared with the conventionally designed heating rod 112, the diameter of the heating rod 112 is increased, the length is lengthened, and the spiral fin is adopted, so that the heating rod 112 has a larger heat dissipation area when heating, and the heat dissipation area in contact with nitrogen is larger, the nitrogen path inside the heating body becomes longer, and the heating time of nitrogen inside the heating body becomes longer, which greatly improves the heating efficiency of nitrogen.

[0053] In this embodiment, the turbojet fitting 17 is arranged vertically, and the transverse pipe 133 is vertically connected to the bottom side of the turbojet fitting 17, and the diameter of the air inlet and the air outlet of the turbojet fitting 17 is between 30-45 mm. The above scheme improves the common small flow design, increases the size of the air inlet and the air outlet, ensures a larger air flux, and the air outlet mode can be adjusted to side injection or turbojet according to demand, suitable for different environments.

[0054] In this embodiment, the adjustment mounting frame 200 includes a fixed chassis 21, a column 22, a first adjustment member 23, a transverse support rod 24, a second adjustment member 25, a vertical support rod 26, a locking member 27 and an L-shaped pipe bracket 28. The bottom of the column 22 is vertically connected to the fixed chassis 21. The first adjustment member 23 is vertically slidably assembled on the column 22 and can be locked and fixed. The transverse support rod 24 is horizontally slidably assembled on the first adjustment member 23 and can be locked and fixed. The second adjustment member 25 is horizontally slidably assembled on the transverse support rod 24 and can be locked and fixed. The vertical support rod 26 is vertically slidably assembled on the second adjustment member 25 and can be locked and fixed. The L-shaped pipe bracket 28 is vertically slidably assembled on the vertical support rod 26 through the locking member 27 and can be locked and fixed. The nitrogen heating body 100 fixed on the L-shaped pipe bracket 28 is located obliquely above the second adjustment member 25.

[0055] The L-shaped pipe bracket 28 is fixed to the bottom corner of the nitrogen heating body 100, and combined with the positional adjustable advantage of the first adjusting member 23 and the second adjusting member 25, it is convenient to adjust the position of the L-shaped pipe bracket 28 relative to the fixed chassis 21 according to the needs of the installation site, ensuring that there is a large space directly below the nitrogen heating body 100 for installing various external pipelines. The overall structure is not only stable, but also easy to adjust and install, and the spatial layout is more reasonable and highly practical.

[0056] In this embodiment, the L-shaped tube support 28 includes a first concave arc plate 281 arranged vertically and a second concave arc plate 282 arranged horizontally. The bottom of the first concave arc plate 281 is connected to the end of the second concave arc plate 282 adjacent to the vertical support rod 26 and has an arc transition. A plurality of first fixing holes 2811 are provided on the first concave arc plate 281, and a plurality of second fixing holes 2821 are provided on the second concave arc plate 282. Both the first fixing holes 2811 and the second fixing holes 2821 are waist-shaped holes. The first concave arc plate 281 and the second concave arc plate 282 are integrally formed stainless steel components.

[0057] The L-shaped pipe bracket 28 of the above structural design can better fit the outer wall of the tubular component, and the first fixing hole 2811 and the second fixing hole 2821 are convenient for using steel wires or bolts to lock and fix the nitrogen heating body 100, and the structure is simple, firm and stable.

[0058] In this embodiment, the locking member 27 includes a locking sleeve 271 fixed to the first concave arc plate 281 and a locking bolt 272 threadedly assembled on the locking sleeve 271, and the locking bolt 272 is pressed against the outer peripheral wall of the vertical support rod 26. The locking member 27 designed as above is very convenient for adjusting the height of the L-shaped pipe bracket 28, and the connection is firm and stable.

[0059] In this embodiment, the first adjusting member 23 includes a first sleeve 231 and a second sleeve 232 which are vertically connected. The first sleeve 231 is slidably mounted on the column 22, and the second sleeve 232 is slidably mounted on the transverse support rod 24. The first sleeve 231 is locked and fixed to the column 22 by multiple sets of first adjusting bolts 233, and the second sleeve 232 is locked and fixed to the transverse support rod 24 by multiple sets of second adjusting bolts 234, wherein the transverse support rod 24 is a square steel pipe, the second sleeve 232 is a square sleeve, the column 22 is a round steel pipe, and the first sleeve 231 is a round sleeve.

[0060] The first adjusting member 23 designed as above is not only convenient for adjusting the height and horizontal position, but also the transverse support rod 24 can be freely rotated horizontally after loosening the first adjusting bolt 233, so the structure is stable and the adjustment is convenient.

[0061] In this embodiment, the second adjusting member 25 includes a third sleeve 251 and a fourth sleeve 252 vertically connected, the third sleeve 251 is slidably mounted on the vertical support rod 26, and the fourth sleeve 252 is slidably mounted on the transverse support rod 24, the third sleeve 251 is locked and fixed to the vertical support rod 26 by multiple groups of third adjusting bolts 253, and the fourth sleeve 252 is locked and fixed to the transverse support rod 24 by multiple groups of fourth adjusting bolts 254, wherein the vertical support rod 26 is a round steel pipe, and the third sleeve 251 is a circular sleeve.

[0062] The second adjusting member 25 designed as above is not only convenient for adjusting the height and horizontal position, but also the vertical support rod 26 can be freely rotated horizontally after loosening the third adjusting bolt 253, so the structure is stable and the adjustment is convenient.

[0063] In order to enhance the connection firmness between the column 22 and the fixed chassis 21 , a plurality of reinforcing plates 29 arranged at intervals are vertically connected between the bottom peripheral side of the column 22 and the upper surface of the fixed chassis 21 .

[0064] In this embodiment, the front of the control box 300 is provided with a touch screen 301, a row of power-on display lights 302, a row of power-on knobs 303, an alarm buzzer 304, an alarm indicator light 305, a buzzer knob 306 and an emergency stop button 307; the interior of the control box 300 is provided with a main control switch 308, a leakage protector 309, a safety relay 310, a fuse 311, a contactor 312, a power line row 313, a 24V switching power supply 314, a 24V terminal row 315, a solid-state relay 316, a main control box 317, a PID control box 318, a gas circuit control unit 319, an external terminal row and a ground row 320, wherein the gas circuit control unit 319 includes a solenoid valve 3191, a flow regulating valve 3192 and a flow meter 3193, which mainly control the size of the gas output and automatically close the gas circuit when the system is abnormal.

[0065] The circuit control module transmits power to the inside of the control box 300 through the external terminal block, and the wires are connected to the main switch 308, which serves as the main control unit of the control box 300 power supply. The main switch 308 connects the output power to the branch terminal, and then connects them to the branch leakage protector 309 respectively. Each leakage protector 309 controls its own heating path separately. After the power is output through the single-path leakage protector 309, it enters the contactor 312, solid-state relay 316, safety relay 310 and fuse 311 respectively, and then the power is output.

[0066] The control box 300 is controlled by an embedded system, using advanced PID controller or other intelligent algorithms to achieve precise temperature control, and transmits data to the touch screen 301 through 485 signals, and can directly read device information and set parameters on the touch screen 301. The temperature control system uses an integrated high-precision temperature sensor to achieve real-time temperature monitoring and feedback control.

[0067] The beneficial technical effects of the nitrogen heating system of the embodiment of the present application are roughly as follows:

[0068] After the cold nitrogen enters the heating unit 11, it is heated and heated. When the gas is discharged, the temperature of the hot nitrogen is detected by the temperature-control thermocouple 16, and the temperature signal is fed back to the control box 300. After the system determines, the appropriate heating power is output, and the heated nitrogen passes through the high-temperature ball valve 14 and the one-way valve 15, and finally enters the pipeline through the vortex jet fittings; when the nitrogen heating body 100 needs to be closed, the high-temperature ball valve 14 can be closed first to prevent the gas inside the pipeline from flowing back into the nitrogen heating body 100, or when the nitrogen heating body 100 suddenly becomes abnormal or the gas source is interrupted, the one-way valve 15 can also effectively prevent the gas inside the pipeline from flowing back into the nitrogen heating body 100, which belongs to double protection;

[0069] The temperature-controlling thermocouple 16 is installed at the front end of the one-way valve 15 and near the bottom air outlet of the heating unit 11. This position is far away from the connection port of the pump device, that is, far away from the turbojet accessory 17. The turbojet accessory 17 and the temperature-controlling thermocouple 16 are also blocked by the one-way valve 15 and the high-temperature ball valve 14. Even if the turbojet accessory 17 leaks or the screws are loose when connected to the pipeline, it is not easy to cause the toxic gas inside the pipeline to flow back and leak, thereby reducing the risk of gas leakage of the nitrogen heating body 100.

[0070] Furthermore, the nitrogen heater 100 can be stably installed by adjusting the mounting frame 200 , and the horizontal position, vertical height and orientation of the nitrogen heater 100 can be adjusted at will according to the actual situation of the construction site, making the installation and adjustment more convenient.

[0071] Combination Figure 7 According to the power-on logic diagram in the figure, the power-on process of the control box 300 is as follows:

[0072] 1. Open the door of the control box 300, turn on the main circuit breaker, and turn on the leakage protector 309;

[0073] 2. Adjust the gas flow regulating valve 3192 so that the flow meter 3193 shows the specified flow rate;

[0074] 3. Close the door of the control box 300, turn on the power-on knob 303, and the power-on indicator light turns on;

[0075] 4. Observe the screen. If PWM has output and the temperature changes, it means the device has been turned on and is running.

[0076] Abnormal processing of the control box 300: After the device alarm occurs, observe the touch screen 301 of the control box 300, click "Real-time Events", view the device alarm information, and handle the device abnormality according to the alarm information.

[0077] Emergency stop and recovery of control box 300:

[0078] In an emergency, the emergency stop button 307 can be pressed. At this time, all the coils of the contactors 312 lose power (main circuit N0 state), and all the incoming terminals of the contactors 312 are powered, while the outgoing terminals are powered off. When the emergency stop button 307 is restored, the main circuits of all contactors 312 are in NC state; the emergency stop button is on the lower left of the front panel of the electrical box. In an emergency, press this button and the equipment will stop working immediately; the method to restore the emergency stop button 307 is to rotate the red part of the emergency stop button 307 clockwise, and the red part will pop out.

[0079] After the nitrogen heating system arrives at the site, if it is not used immediately, it should be kept in a clean and dry environment.

[0080] a) Temperature: -25℃-55℃;

[0081] b) Relative humidity: 50%-80%;

[0082] c) Altitude: 0-2000M;

[0083] d) Voltage: 180-220V;

[0084] e) Number of phases: 3;

[0085] f) Frequency: 50 / 60HZ.

[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A nitrogen heating system, characterized in that: It comprises a nitrogen heating body (100), a control box (300) and an adjustment mounting frame (200); The nitrogen heating body (100) comprises a vertically arranged heating unit (11), a nitrogen passage is arranged inside the heating unit (11), a cold nitrogen inlet (12) is arranged on the outside of the top of the heating unit (11), a hot nitrogen pipeline (13) is arranged at the bottom of the heating unit (11), a high-temperature ball valve (14) and a one-way valve (15) are arranged on the hot nitrogen pipeline (13), a temperature-controlling thermocouple (16) is arranged on one side of the hot nitrogen pipeline (13), and the temperature-controlling thermocouple (16) is arranged on the other side of the hot nitrogen pipeline (13). 6) is located between the high-temperature ball valve (14) and the heating unit (11), a turbojet fitting (17) is provided at the output end of the hot nitrogen pipeline (13), the one-way valve (15) is located between the turbojet fitting (17) and the high-temperature ball valve (14), a temperature measuring unit (18) is provided on the outer side of the bottom of the heating unit (11), the one-way valve (15) is used to prevent the gas from flowing back to the heating unit (11), and the turbojet fitting (17) is connected to the airflow pipeline of the jet equipment; The bottom of the hot nitrogen pipeline (13) is fixed on the adjustment mounting frame (200), and the adjustment mounting frame (200) is used to adjust the horizontal position, vertical height and orientation of the nitrogen heating body (100); The control box (300) comprises a circuit control module and a gas circuit control module. The gas circuit control module is connected to the cold nitrogen inlet (12) and the high-temperature ball valve (14) to control the size and on-off of the gas output. The circuit control module is connected to the heating unit (11), the temperature-control thermocouple (16) and the temperature measurement unit (18) to control the heating temperature, heating time and on-off of the nitrogen.

2. The nitrogen heating system according to claim 1, characterized in that: The hot nitrogen pipeline (13) comprises a vertical pipe (131), an elbow (132) and a transverse pipe (133); the vertical pipe (131) is arranged along the central axis of the heating unit (11) and connected to the bottom of the heating unit (11); the elbow (132) is connected between the bottom of the vertical pipe (131) and the transverse pipe (133); the turbojet fitting (17) is arranged at an end of the transverse pipe (133) away from the transverse pipe (133); the high-temperature ball valve (14) is arranged on the vertical pipe (131); the temperature-controlling thermocouple (16) is arranged on the outside of the vertical pipe (131); and the one-way valve (15) is arranged on the transverse pipe (133).

3. The nitrogen heating system according to claim 1, characterized in that: The temperature measuring unit (18) comprises a temperature measuring thermocouple (181) and a plurality of thermal springs (182), wherein the thermal springs (182) are connected to the outer side of the bottom of the heating unit (11), and the plurality of thermal springs (182) are installed inside a box body (183), and the temperature measuring thermocouple (181) is connected to the bottom of the box body (183) and is in thermal contact with the thermal springs (182) inside.

4. The nitrogen heating system according to claim 1, characterized in that: The heating unit (11) comprises a thermal insulation outer sleeve (111), a heating rod (112) and a flange seal (113); the heating rod (112) is installed inside the thermal insulation outer sleeve (111) and the central axes of the two coincide with each other; a wiring control terminal is arranged on the top of the heating rod (112), and the wiring control terminal is located outside the thermal insulation outer sleeve (111); and the flange seal (113) is installed on the top of the thermal insulation outer sleeve (111).

5. The nitrogen heating system according to claim 4, characterized in that: The heating rod (112) is provided with a spiral fin located inside the thermal insulation outer sleeve (111), and the outer diameter of the spiral fin is between 50-60 mm. The length of the heating rod (112) located inside the thermal insulation outer sleeve (111) is between 300-450 mm.

6. The nitrogen heating system according to claim 2, characterized in that: The turbojet accessory (17) is arranged vertically, and the transverse pipe (133) is vertically connected to the bottom side of the turbojet accessory (17). The diameters of the air inlet and the air outlet of the turbojet accessory (17) are between 30 and 45 mm.

7. The nitrogen heating system according to claim 1, characterized in that: The adjustable mounting frame (200) comprises a fixed chassis (21), a column (22), a first adjusting member (23), a transverse support rod (24), a second adjusting member (25), a vertical support rod (26), a locking member (27) and an L-shaped pipe bracket (28), wherein the bottom of the column (22) is vertically connected to the fixed chassis (21), the first adjusting member (23) is vertically slidably assembled on the column (22) and can be locked and fixed, and the transverse support rod (24) is transversely slidably assembled on the first adjusting member (27). The second adjusting member (25) is slidably mounted on the lateral support rod (24) and can be locked and fixed. The vertical support rod (26) is slidably mounted on the second adjusting member (25) and can be locked and fixed. The L-shaped pipe bracket (28) is slidably mounted on the vertical support rod (26) and can be locked and fixed through the locking member (27). The nitrogen heating body (100) fixed on the L-shaped pipe bracket (28) is located obliquely above the second adjusting member (25).

8. The nitrogen heating system according to claim 7, characterized in that: The first adjusting member (23) comprises a first sleeve (231) and a second sleeve (232) which are vertically connected, the first sleeve (231) being slidably mounted on the column (22), the second sleeve (232) being slidably mounted on the transverse support rod (24), the first sleeve (231) being locked and fixed on the column (22) by a plurality of sets of first adjusting bolts (233), the second sleeve (232) being locked and fixed on the transverse support rod (24) by a plurality of sets of second adjusting bolts (234).

9. The nitrogen heating system according to claim 7, characterized in that: The second adjusting member (25) comprises a third sleeve (251) and a fourth sleeve (252) which are vertically connected. The third sleeve (251) is slidably mounted on the vertical support rod (26), and the fourth sleeve (252) is slidably mounted on the transverse support rod (24). The third sleeve (251) is locked and fixed to the vertical support rod (26) by multiple sets of third adjusting bolts (253), and the fourth sleeve (252) is locked and fixed to the transverse support rod (24) by multiple sets of fourth adjusting bolts (254).

10. The nitrogen heating system according to claim 1, characterized in that: The control box (300) is provided with a touch screen (301), a row of power-on display lights (302), a row of power-on knobs (303), an alarm buzzer (304), an alarm indicator light (305), a buzzer knob (306) and an emergency stop button (307) on the front of the box door; the control box (300) is provided with a main control switch (308), a leakage protector (309), a safety relay (310), a fuse (311), a contactor (312), a power line row (313), a 24V switching power supply (314), a 24V wiring terminal row (315), a solid-state relay (316), a main control box (317), a PID control box (318), a gas circuit control unit (319), an external wiring terminal row and a ground row (320) inside.

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