Electric control cabinet of pit type nitriding furnace

Abstract

The invention relates to the technical field of electric control cabinets, in particular to an electric control cabinet of a pit type nitriding furnace, which comprises a cabinet body, a cabinet door is rotatably connected to the outer wall of the cabinet body, a mounting plate is mounted in the cabinet body through a mounting assembly, a baffle assembly is arranged on one side, close to the cabinet door, of the mounting plate, and a plurality of power devices are fixedly mounted on the mounting plate. The power equipment is provided with temperature detection equipment, the baffle assembly comprises two first blocking strips, a plurality of second blocking strips are evenly arranged between the two first blocking strips, and a driving part and a liquid nitrogen conveying assembly are arranged in the cabinet body. Low-energy-consumption air cooling is combined with the dynamic flow guide design at the low temperature, uniform heat dissipation is ensured, liquid nitrogen is introduced to cooperate with air cooling at the medium temperature, efficient mixed cooling airflow is formed, a fire source is automatically isolated at the high temperature, liquid nitrogen vaporization is accelerated, cooling and fire suppression are fast, energy consumption management is optimized, the heat dissipation efficiency is improved, and the service life is prolonged. And the operation stability and safety of the power equipment are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric control cabinets, and particularly to an electric control cabinet for a well-type nitriding furnace. Background Art

[0002] The electric control cabinet of a well-type nitriding furnace is an electrical equipment cabinet that controls its operation, and has functions such as controlling the heating system, controlling gas supply, monitoring and protection, and program control; it consists of a cabinet made of metal material with good protection performance, including various electrical components such as circuit breakers, contactors, and relays, and a wiring system for connecting components to form a complete circuit, etc. It is a key equipment to ensure the normal operation of the well-type nitriding furnace and achieve precise control of the nitriding process.

[0003] Currently, due to the lack of dynamic adjustment ability based on real-time temperature data in the prior art, the heat dissipation strategy cannot be flexibly adjusted according to the actual working conditions of the equipment. When the equipment is in a low-temperature state, the system starts a high-energy-consuming strong heat dissipation mode due to the lack of intelligent perception, resulting in unnecessary energy waste. At the same time, the traditional fan ventilation heat dissipation method is prone to uneven heat dissipation of the equipment, resulting in local overheating, increasing the risk of faults such as short circuits, shortening the service life of the equipment. In addition, the voltage of the electric control cabinet of the well-type nitriding furnace is higher than that of ordinary electric control cabinets, and it is more likely to catch fire when the equipment temperature exceeds the safety threshold. The traditional electric control cabinet cannot take effective measures in time due to the lack of an emergency response mechanism, and is extremely prone to major safety hazards caused by thermal runaway, thus making the practicability of the equipment poor. Summary of the Invention

[0004] The purpose of the present invention is to propose an electric control cabinet for a well-type nitriding furnace to solve the problem of poor heat dissipation effect caused by the lack of dynamic adjustment ability based on real-time temperature in the prior art for electric control cabinets.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An electric control cabinet for a well-type nitriding furnace, comprising a cabinet body, the outer wall of the cabinet body is rotatably connected with a cabinet door, an installation plate is installed in the cabinet body through an installation component, a baffle component is arranged on one side of the installation plate close to the cabinet door, an installation cavity is arranged between the installation plate and the baffle component, and a heat dissipation cavity is arranged between the baffle component and the cabinet door. A plurality of power devices are fixedly installed on the installation plate, and the power devices are located in the installation cavity. A temperature detection device is arranged on the power device, and the temperature detection device is provided with a first threshold and a second threshold. The baffle component includes two first blocking strips, and one side of each of the two first blocking strips away from each other is in contact with the inner wall of the cabinet body. A plurality of second blocking strips are evenly arranged between the two first blocking strips. A driving part and a liquid nitrogen delivery component are arranged in the cabinet body. The driving part is used to drive the plurality of second blocking strips to rotate, and the liquid nitrogen delivery component is used to deliver liquid nitrogen into the plurality of second blocking strips. A plurality of air outlet holes are evenly opened on one side of the second blocking strip close to the power device. A ventilation component corresponding to the position of the heat dissipation cavity is arranged on the outer wall of the cabinet body.

[0006] Preferably, the installation component includes a top plate and a bottom plate fixedly installed at the top and bottom of the installation plate respectively. Sliding grooves are opened at the top and bottom of the inner wall of the cabinet body. The top plate and the bottom plate are respectively slidably connected with the sliding grooves at the corresponding positions through trapezoidal sliding strips fixedly connected thereto. A magnetic plate is fixedly installed on the side wall of the trapezoidal sliding strip, and a magnetic block magnetically connected with the magnetic plate is fixedly installed in the sliding groove.

[0007] Preferably, sliding grooves corresponding to the first blocking strips are opened on the top plate and the bottom plate respectively. Sliding strips are fixedly installed at the top and bottom ends of the first blocking strip, and the sliding strips are slidably connected with the sliding grooves at the corresponding positions. The first blocking strip is elastically connected with the installation plate through a plurality of second springs. A hook is fixedly installed on the inner side of the cabinet door. The first blocking strip is connected with the hook through a connecting rope. An infrared rangefinder for detecting the displacement of the first blocking strip is arranged on the top of the bottom plate.

[0008] Preferably, the bottoms of the plurality of second blocking strips are respectively rotatably connected with the bottom plate through T-shaped connecting rods. A plurality of electric telescopic rods are fixedly installed inside the bottom plate, and the plurality of electric telescopic rods respectively correspond to the positions of the plurality of T-shaped connecting rods. The electric telescopic rods are used to strike the lower ends of the T-shaped connecting rods.

[0009] Preferably, the driving part includes a synchronous belt and a motor, the motor is fixedly mounted on the top of the inner wall of the top plate, the output end of the motor is fixedly connected to a driving wheel, the tops of the plurality of second blocking strips are fixedly connected to a connecting pipe, and the outer wall of each connecting pipe is fixedly mounted with a synchronous wheel, the synchronous belt is sleeved on the periphery of the driving wheel and the plurality of synchronous wheels, and meshes with the driving wheel and the synchronous wheel, a plurality of groups of limit columns are fixedly mounted on the bottom of the inner wall of the top plate, the plurality of groups of limit columns respectively correspond to the positions of the plurality of synchronous wheels, and each limit column contacts with the non-meshing side of the synchronous belt, and the limit column is used to squeeze the synchronous belt to produce elastic deformation in the direction of the synchronous wheel.

[0010] Preferably, the liquid nitrogen delivery assembly includes a liquid nitrogen storage tank fixedly mounted on the top of the cabinet, a delivery portion connected to the liquid nitrogen storage tank is fixedly mounted inside the top plate, a metering valve is rotatably connected to the top of the connecting pipe, and an upper end of the metering valve is fixedly connected to the delivery portion.

[0011] Preferably, the ventilation assembly includes a fan, which is fixedly mounted on the outer wall of the cabinet through a fixing ring, and the air outlet direction of the fan faces the heat dissipation cavity. One end of the fixing ring away from the cabinet is threadedly connected to a mounting shell, and a cleaning assembly is arranged in the mounting shell.

[0012] Preferably, the cleaning component includes a second U-shaped frame fixedly installed on the top of the mounting shell, a first U-shaped frame is fixedly installed on the bottom of the inner wall of the mounting shell, a porous plate is arranged between the first U-shaped frame and the second U-shaped frame, and the porous plate is slidably connected to the first U-shaped frame and the second U-shaped frame, the bottom of the porous plate is elastically connected to the first U-shaped frame through a first spring, the interior of the porous plate is filled with a desiccant, a dust removal net is fixedly installed in the mounting shell, and the dust removal net is located on the side of the porous plate away from the fan, a pressure sensor is fixedly installed on the bottom of the porous plate, and a buzzer is fixedly installed on the outer wall of the fixing ring.

[0013] Preferably, a first exhaust portion and a second exhaust portion are provided on a side of the cabinet body away from the cabinet door, a plurality of through holes are provided on the mounting plate, the second exhaust portion is located below the first exhaust portion, and a gas detector for detecting nitrogen emission concentration is provided on the second exhaust portion.

[0014] Preferably, a plurality of inclined plates are evenly fixedly installed on the inner wall of the second blocking strip along the height direction, the plurality of inclined plates are staggered and cross-distributed, through holes are provided on the inclined plates, and a retaining groove is provided on the top of the inclined plates.

[0015] Compared with the prior art, the advantages of the present invention are: 1. When the temperature of the power equipment is lower than the first threshold, the present invention starts the first-level heat dissipation mode. The fan blows in air and drives the second blocking strip to rotate slightly forward and backward in cooperation with the synchronous pulley for heat dissipation. This avoids starting the high-energy-consuming strong heat dissipation mode when the equipment temperature is relatively low, reduces the overall energy consumption of the system, saves energy. The slight forward and backward rotation of the second blocking strip helps the air to pass through and blow onto the power equipment more evenly, taking away the heat generated by the equipment, meeting the heat dissipation requirements of the equipment in a lower heating state, maintaining the normal operating temperature of the equipment, and preventing the equipment from overheating due to the gradual accumulation of temperature.

[0016] 2. When the temperature of the power equipment is between the first threshold and the second threshold, the present invention starts the second-level heat dissipation mode and introduces liquid nitrogen for heat dissipation. The vaporization of liquid nitrogen will absorb a large amount of heat, which can quickly and effectively reduce the temperature of the power equipment. At the same time, the liquid nitrogen flows in the second blocking strip and vaporizes quickly. The low-temperature nitrogen gas is discharged through the air outlet holes. At the same time, the fan blows in external air, forming a low-temperature mixed gas of air and low-temperature nitrogen gas. Under the guidance of multiple second blocking strips, this mixed gas can be blown to different positions of the power equipment, optimizing the heat dissipation path, enabling the heat to be taken away more comprehensively, and ensuring that the equipment operates within an appropriate temperature range.

[0017] 3. When the temperature of the power equipment exceeds the second threshold, the present invention starts the third-level heat dissipation mode and cuts off the power supply. The second blocking strip is driven by the synchronous pulley to be arranged in contact with the first blocking strip, separating the installation cavity from the heat dissipation cavity, which can effectively prevent the spread of fire, prevent the fire from spreading to other areas of the cabinet, and avoid triggering a larger-scale safety accident. A large amount of liquid nitrogen is pumped into the second blocking strip, and the second blocking strip is vibrated by knocking with the electric telescopic rod to increase the falling rate of the liquid nitrogen and accelerate the vaporization speed of the liquid nitrogen, thereby quickly reducing the temperature of the power equipment, effectively suppressing the development of the fire, and buying time for subsequent treatment, minimizing the irreversible damage caused to the equipment by high temperature.

[0018] 4. The present invention measures the liquid nitrogen entering each second blocking strip through a metering valve to ensure that the liquid nitrogen enters the interior of multiple second blocking strips evenly. The intercepting groove can temporarily retain the liquid nitrogen, extending its residence time in the second blocking strip, enabling the liquid nitrogen to absorb the surrounding heat more fully for vaporization. The through holes allow the liquid nitrogen to flow continuously, avoiding local accumulation. The two work together to achieve the orderly vaporization and flow of the liquid nitrogen, ensuring the stability of the vaporization process, preventing the safety hazard caused by a sudden increase in pressure due to too fast vaporization, and avoiding affecting the heat dissipation effect due to poor flow, improving the reliability of the heat dissipation system. In addition, part of the liquid nitrogen intercepted by the intercepting groove vaporizes and is discharged from the adjacent air outlet holes, enabling the low-temperature nitrogen gas to evenly cover the power equipment at different positions, avoiding local overheating, and ensuring that each equipment can be effectively cooled, improving the overall uniformity of heat dissipation.

[0019] 5. The present invention delivers clean air, which has been dust-removed by a dust removal net and dehumidified by a perforated plate, into the cabinet through a fan, effectively preventing dust and moisture from adhering to electrical equipment, avoiding problems such as poor heat dissipation caused by dust accumulation, short circuits, or corrosion and insulation degradation caused by moisture, significantly improving the stability and lifespan of the equipment. When the desiccant is saturated, the perforated plate sinks to trigger a pressure sensor and activate a buzzer for alarm, prompting timely replacement and maintenance. The installation shell and the fixing ring are connected by threads, and when disassembling, only the shell needs to be unscrewed to replace the perforated plate or the dust removal net, without the need for additional tools, thus improving the maintenance efficiency.

[0020] In summary, the present invention achieves a balance between high-efficiency energy conservation and safety protection by setting three heat dissipation modes: at low temperatures, low-energy-consumption air cooling combined with dynamic diversion design is adopted to ensure uniform heat dissipation; at medium temperatures, liquid nitrogen is introduced to cooperate with air cooling to form a highly efficient mixed cooling air flow; at high temperatures, the fire source is automatically isolated and the vaporization of liquid nitrogen is accelerated to rapidly cool down and suppress the fire. This stepped heat dissipation mode not only optimizes energy consumption management but also improves the heat dissipation efficiency, and at the same time has an active fire prevention function, significantly enhancing the stability and safety of the operation of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 2 is a schematic diagram of the structure of the first blocking strip and the second blocking strip of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 3 is a schematic diagram of the structure of the first exhaust part and the second exhaust part of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 4 is a schematic diagram of the internal structure of the cabinet of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 5 is a sectional view of the bottom plate and the top plate of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 6 is Figure 5 an enlarged schematic diagram of the structure at A in Figure 7 is Figure 5 an enlarged schematic diagram of the structure at B in Figure 8 is a sectional view of the second blocking strip of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 9 is a sectional view of the installation shell and the fixing ring of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 10 is a schematic diagram of the structure of the first blocking strip and the second spring of an electric control cabinet of a well-type nitriding furnace proposed by the present invention; Figure 11 isFigure 10 Schematic enlarged view of the structure at position C in the middle.

[0022] In the figure: 1 cabinet body, 101 chute, 2 cabinet door, 3 liquid nitrogen storage tank, 4 installation shell, 5 bottom plate, 6 top plate, 7 trapezoidal slide bar, 8 first blocking bar, 9 second blocking bar, 10 first exhaust part, 11 second exhaust part, 12 mounting plate, 13 power equipment, 14 air outlet hole, 15 magnetic plate, 16 conveying part, 17 driving part, 18 metering valve, 19 synchronous pulley, 20 connecting pipe, 21 T-shaped connecting rod, 22 electric telescopic rod, 23 inclined plate, 24 through hole, 25 intercepting groove, 26 fixing ring, 27 fan, 28 perforated plate, 29 dust removal net, 30 first spring, 31 first U-shaped frame, 32 buzzer, 33 second U-shaped frame, 34 second spring, 35 sliding groove, 36 sliding bar, 37 infrared rangefinder, 38 connecting rope. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Refer to Figures 1 to 11 , an electric control cabinet of a well-type nitriding furnace, including a cabinet body 1, a cabinet door 2 is rotatably connected to the outer wall of the cabinet body 1, a mounting plate 12 is arranged inside the cabinet body 1, a top plate 6 and a bottom plate 5 are respectively fixedly installed at the top and bottom of the mounting plate 12, sliding grooves 101 are respectively opened at the top and bottom of the inner wall of the cabinet body 1, the top plate 6 and the bottom plate 5 are respectively slidably connected to the sliding grooves 101 at corresponding positions through trapezoidal slide bars 7 fixedly connected thereto, a magnetic plate 15 is fixedly installed on the side wall of the trapezoidal slide bar 7, a magnetic block is fixedly installed in the sliding groove 101, and the magnetic block is magnetically connected to the magnetic plate 15 to limit the displacement of the trapezoidal slide bar 7, further fixing the positions of the bottom plate 5 and the top plate 6, preventing them from loosening or displacing due to vibration or other reasons during use, thereby enhancing the overall stability of the internal structure of the electric control cabinet. When the cabinet door 2 is closed, its inner side surface is in close contact with the top plate 6, forming an auxiliary positioning structure and further strengthening the installation position of the top plate 6.

[0025] A baffle assembly is arranged between the bottom plate 5 and the top plate 6. The baffle assembly is located between the mounting plate 12 and the cabinet door 2. An installation cavity is arranged between the mounting plate 12 and the baffle assembly, and a heat dissipation cavity is arranged between the baffle assembly and the cabinet door 2. A plurality of power devices 13 are fixedly installed on the mounting plate 12, and the power devices 13 are located in the installation cavity. A temperature detection device is arranged on the power devices 13. The temperature detection device is provided with a first threshold and a second threshold. The outer wall of the cabinet body 1 is fixedly installed with a fan 27 through a fixing ring 26. The air outlet direction of the fan 27 is directly opposite to the heat dissipation cavity. One end of the fixing ring 26 away from the cabinet body 1 is threadedly connected with a detachable installation shell 4. The top of the installation shell 4 is fixedly installed with a second U-shaped frame 33. The bottom of the inner wall of the installation shell 4 is fixedly installed with a first U-shaped frame 31. A porous plate 28 is arranged between the first U-shaped frame 31 and the second U-shaped frame 33, and the porous plate 28 is slidably connected to both the first U-shaped frame 31 and the second U-shaped frame 33. The restriction of the U-shaped frame on the vertical movement direction of the porous plate 28 ensures the stability of the porous plate 28 during movement and prevents it from shifting or jamming. The bottom of the porous plate 28 is elastically connected to the first U-shaped frame 31 through a first spring 30, which can effectively buffer the movement of the porous plate 28. The inside of the porous plate 28 is filled with a moisture absorbent. A dust removal net 29 is fixedly installed in the installation shell 4, and the dust removal net 29 is located on the side of the porous plate 28 away from the fan 27. By blowing clean air that has been dust-removed by the dust removal net 29 and moisture-absorbed by the porous plate 28 into the cabinet body 1 through the fan 27, a good operating environment can be provided for the power devices 13, preventing dust and moisture from entering the cabinet body 1 and adhering to the power devices 13, and preventing problems such as poor heat dissipation and short circuits caused by dust accumulation, as well as failures such as equipment corrosion and decreased insulation performance caused by moisture, thereby extending the service life of the power devices 13 and improving the stability and reliability of equipment operation. When the weight of the moisture absorbent increases after use, the porous plate 28 will move downward. A pressure sensor is fixedly installed at the bottom of the porous plate 28. A buzzer 32 is fixedly installed on the outer wall of the fixing ring 26. When the porous plate 28 sinks due to the saturation of the moisture absorbent, the pressure sensor at its bottom contacts the first U-shaped frame 31, triggering the buzzer 32 to alarm, prompting the staff to replace the porous plate 28. This design can monitor the saturation state of the moisture absorbent in real time, ensure timely maintenance before the moisture absorption efficiency decreases, and guarantee the dryness of the air inside the cabinet body 1. When replacing the porous plate 28 or the dust removal net 29, only need to unscrew the installation shell 4 to complete the disassembly. No other tools are required during the maintenance process, significantly improving the maintenance efficiency.

[0026] The baffle assembly includes two first blocking bars 8, and the first blocking bars 8 are parallel to the mounting plate 12. The sides of the two first blocking bars 8 away from each other are in contact with the inner wall of the cabinet body 1. A plurality of second blocking bars 9 are evenly arranged between the two first blocking bars 8. The top of each second blocking bar 9 is fixedly communicated with a connecting pipe 20. A synchronous pulley 19 is fixedly installed on the outer wall of the connecting pipe 20. A driving part 17 for driving a plurality of synchronous pulleys 19 to rotate is arranged inside the top plate 6. The driving part 17 includes a synchronous belt and a motor. The motor is fixedly installed on the top of the inner wall of the top plate 6. The output end of the motor is fixedly connected with a driving pulley. The synchronous belt is sleeved on the periphery of the driving pulley and a plurality of synchronous pulleys 19 and meshes with the driving pulley and the synchronous pulleys 19. When the temperature detection device detects that the temperature of the power equipment 13 is less than the first threshold, the first-level heat dissipation mode is started (the temperature detection device is electrically connected to the control unit and the internal equipment of the electric control cabinet. The signal output end of the temperature detection device is connected to the signal input end of the control unit by a wire. After the control unit processes the temperature signal according to the preset program, it controls the start, stop and operation mode of mechanical structures such as the fan 27 and the driving part 17 through the driving circuit. This is the prior art and will not be elaborated here). The fan 27 blows air into the cabinet body 1. The driving part 17 drives a plurality of second blocking bars 9 to rotate slightly forward and backward through the synchronous pulleys 19, changing the flow direction and path of the air, making the air form a more complex air flow in the cabinet body 1, avoiding the straight-line flow of the air, enabling the air to contact the power equipment 13 more fully, increasing the contact area and time between the air and the surface of the equipment, thereby more effectively taking away the heat, improving the heat dissipation efficiency. The rotating second blocking bars 9 can direct the air to the originally possible heat dissipation dead corner area, avoiding the occurrence of local overheating phenomena and ensuring the overall heat dissipation effect of the power equipment 13. A first exhaust part 10 is arranged on the side of the cabinet body 1 away from the cabinet door 2. A plurality of through holes are arranged on the mounting plate 12. The through holes cooperate with the first exhaust part 10 to discharge the air in the cabinet body 1.

[0027] A plurality of groups of limit posts are fixedly installed at the bottom of the inner wall of the top plate 6. The plurality of groups of limit posts correspond to the positions of a plurality of synchronous pulleys 19 respectively. Each limit post is in contact with the non-meshing side of the synchronous belt, causing the synchronous belt to produce elastic deformation in the direction of the synchronous pulley 19, increasing the actual number of meshing teeth between the synchronous pulley 19 and the synchronous belt. More meshing teeth mean that during the transmission process, the force transmission is more uniform and stable, which can effectively reduce the slipping phenomenon of the synchronous belt, ensure that the driving part 17 can reliably transmit the power of the motor to a plurality of synchronous pulleys 19, and then drive the second blocking bars 9 to rotate stably, ensuring the stable operation of the heat dissipation system.

[0028] At the top of the cabinet body 1, a liquid nitrogen storage tank 3 is fixedly installed. Inside the top plate 6, a conveying part 16 communicating with the liquid nitrogen storage tank 3 is fixedly installed. The top of the connecting pipe 20 is rotatably connected to a metering valve 18, and the upper end of the metering valve 18 is fixedly connected to the conveying part 16. When the temperature of the power equipment 13 is between the first threshold and the second threshold, the temperature of the power equipment 13 is higher than the normal operating temperature. At this time, the secondary cooling mode is started. The conveying part 16 starts and extracts liquid nitrogen from the liquid nitrogen storage tank 3. The liquid nitrogen is transported to the internal cavities of each second blocking strip 9 through multiple metering valves 18 and connecting pipes 20. The metering valve 18 monitors the liquid nitrogen flow rate of each branch in real time. When a single second blocking strip 9 reaches the preset filling amount, the metering valve 18 of this branch automatically closes the upper channel of the connecting pipe 20 and diverts the liquid nitrogen to other unqualified second blocking strips 9, ensuring that the liquid nitrogen can be evenly distributed to each second blocking strip 9, avoiding the situation of too much or too little liquid nitrogen in some second blocking strips 9, and ensuring the uniformity and effectiveness of the overall heat dissipation. The second blocking strip 9 is made of a material resistant to liquid nitrogen flow (such as stainless steel, which has excellent low-temperature toughness and can maintain good strength and toughness at the liquid nitrogen temperature of -196°C), ensuring that the second blocking strip 9 will not crack, deform, etc. in the low-temperature environment of liquid nitrogen, and ensuring the safety and reliability of the liquid nitrogen transportation and heat dissipation system. On the side of the second blocking strip 9 close to the power equipment 13, a plurality of air outlet holes 14 are provided. Along the height direction, a plurality of inclined plates 23 are evenly fixedly installed on the inner wall of the second blocking strip 9. The plurality of inclined plates 23 are distributed in a staggered and crossed manner. Through holes 24 are provided on the inclined plates 23, and intercepting grooves 25 are provided on the inclined plates 23. The design of the inclined plates 23 greatly increases the contact area and flow path between the liquid nitrogen and the air. When a small amount of liquid nitrogen meanders on the inclined plates 23, it fully absorbs the external heat and accelerates the vaporization process, ensuring the rapid generation of low-temperature nitrogen gas and providing an efficient cooling source for the power equipment 13. The air outlet holes 14 cooperate with the vaporization path guided by the inclined plates 23 to evenly diffuse the low-temperature nitrogen gas into the cabinet body 1. At the same time, the second blocking strip 9 rotates slightly forward and backward to further disperse the air flow and fully mix with the air blown by the fan 27 to form a low-temperature mixed gas, accurately covering each part of the power equipment 13 to achieve all-round and dead-angle-free heat dissipation. The intercepting groove 25 can temporarily retain the liquid nitrogen and extend its residence time in the second blocking strip 9, while the through hole 24 allows the liquid nitrogen to continue to flow, avoiding local accumulation. The two work together to achieve the orderly vaporization and flow of the liquid nitrogen, preventing the pressure from rising suddenly due to too fast vaporization or affecting the heat dissipation effect due to poor flow. The conveying part 16 is connected to an external air outlet structure. When the internal air pressure exceeds the threshold, it automatically discharges the excess gas, effectively preventing the explosion risk caused by too high air pressure due to liquid nitrogen vaporization.

[0029] When the temperature of the power equipment 13 exceeds the second threshold, the third-level heat dissipation mode is activated, the power equipment 13 is powered off, and the driving unit 17 drives the multiple synchronous wheels 19 to rotate at the same time, so that the multiple second blocking bars 9 rotate to be arranged in a straight line with the first blocking bar 8, and the adjacent blocking bars contact each other, thereby separating the installation cavity where the power equipment 13 is located from the heat dissipation cavity, and then a large amount of liquid nitrogen is introduced into the multiple second blocking bars 9, and the liquid nitrogen flows downward through the through hole 24. The bottom of each second blocking bar 9 is rotatably connected to the bottom plate 5 through a T-shaped connecting rod 21. A plurality of electric telescopic rods 22 are fixedly installed inside the bottom plate 5. The plurality of electric telescopic rods 22 correspond to the positions of the plurality of T-shaped connecting rods 21 respectively. The electric telescopic rods 22 continuously extend and retract and quickly hit the lower end of the T-shaped connecting rod 21, so that the second blocking bar 9 vibrates, which effectively increases the falling rate of the liquid nitrogen. The faster falling rate means that the liquid nitrogen can contact with the inclined plate 23 and other structures more quickly, thereby increasing the contact area between the liquid nitrogen and the surrounding air, thereby accelerating the vaporization of the liquid nitrogen. A large amount of vaporized liquid nitrogen forms low-temperature nitrogen and enters from the outlet 14 The installation cavity can quickly take away the heat of the power equipment 13 and achieve rapid cooling. The nitrogen formed by the vaporization of a large amount of liquid nitrogen can efficiently replace the air inside the cabinet 1. Since nitrogen is non-flammable and does not support combustion, it can effectively extinguish the fire and prevent the spread of fire that may be caused by high temperature. This buys more emergency response time for the staff and reduces the risk of major losses caused by fire. A second exhaust portion 11 is provided on the side of the cabinet 1 away from the cabinet door 2. The second exhaust portion 11 is located below the first exhaust portion 10, so that the mixed gas and subsequent nitrogen can be discharged in an orderly manner, which is convenient for the classified discharge of gases generated at different stages, and helps to maintain the stable air pressure inside the cabinet 1. At the same time, it also meets environmental protection and safety requirements. When liquid nitrogen moves on multiple inclined plates 23, the retention groove 25 can continuously retain part of the liquid nitrogen. After the liquid nitrogen is vaporized, it is discharged from the adjacent air outlet 14, so that the power equipment 13 at different positions can be evenly covered by low-temperature nitrogen, avoiding local overheating, ensuring that each device can be effectively cooled, and improving the uniformity of overall heat dissipation.

[0030] Sliding grooves 35 are provided at corresponding positions of the top plate 6 and the bottom plate 5 for the first blocking strip 8. Sliding strips 36 are fixedly installed at the top and bottom ends of the first blocking strip 8, and the sliding strips 36 are slidably connected to the sliding grooves 35 at corresponding positions. The first blocking strip 8 is elastically connected to the mounting plate 12 through a plurality of second springs 34. A hook is fixedly installed inside the cabinet door 2. The first blocking strip 8 is connected to the hook through a connecting rope 38. After the device starts the three-stage heat dissipation mode, the staff repairs the device. At this time, the cabinet body 1 may be filled with a large amount of nitrogen. The buzzer 32 emits a warning to prompt the staff to postpone entering the cabinet body 1, avoiding the staff entering the nitrogen-filled cabinet body 1 without knowing it, ensuring personnel safety. The staff opens the cabinet door 2 and pulls the first blocking strip 8 to slide through the connecting rope 38, so that a gap is formed between the first blocking strip 8 and the second blocking strip 9. An infrared rangefinder 37 is provided on the top of the bottom plate 5. When the infrared rangefinder 37 detects the movement of the first blocking strip 8, the blower 27 continuously blows air into the cabinet body 1 to displace the nitrogen in the installation cavity. A gas detector is provided on the second exhaust part 11. When the gas detector detects that the nitrogen concentration in the discharged gas is close to normal, the buzzer 32 stops warning, ensuring that the nitrogen in the cabinet has been basically discharged when the staff enters, avoiding suffocation of the staff due to too high nitrogen concentration, effectively ensuring personnel safety. The position of the second exhaust part 11 is relatively low, and nitrogen is heavier than air. This design conforms to the physical properties of the gas, facilitating the replacement and discharge of nitrogen. By blowing air through the blower 27, the nitrogen inside the cabinet body 1 can be discharged more efficiently, accelerating the gas replacement process, and improving the effect and efficiency of gas replacement. When the cabinet door 2 is closed, the second spring 34 can drive the first blocking strip 8 to reset, ensuring the position stability of the first blocking strip 8 in the normal state.

[0031] When the present invention is in use, the temperature detection device detects the temperature of the power equipment 13 in real time. When the temperature of the power equipment 13 is lower than the first threshold, the first-level heat dissipation mode is started. Air is blown into the cabinet body 1 by the fan 27. At the same time, the driving part 17 drives multiple synchronous wheels 19 to rotate forward and backward slightly, so that multiple second blocking strips 9 also rotate forward and backward slightly. When the air passes through the porous plate 28 and the dust removal net 29, the internal dust and moisture will be absorbed by the moisture absorbent inside the porous plate 28 and the dust removal net 29. The clean air can pass through multiple second blocking strips 9 and be blown onto the power equipment 13, and then the air is discharged from the cabinet body 1 through the first exhaust part 10, thereby realizing the heat dissipation of the power equipment 13. The slight forward and backward rotation of multiple second blocking strips 9 can blow the air to different positions of the power equipment 13, effectively improving the heat dissipation effect. After the moisture absorbent inside the porous plate 28 is used, its weight will gradually increase, causing the porous plate 28 to gradually squeeze the first spring 30 and move downward. When the bottom pressure sensor of the porous plate 28 contacts the first U-shaped frame 31, a beeping prompt will be issued through the buzzer 32, indicating that the porous plate 28 needs to be replaced. The installation shell 4 and the fixing ring 26 are in threaded connection, which is convenient for replacing the porous plate 28 and the dust removal net 29.

[0032] When the temperature of the power equipment 13 is between the first threshold and the second threshold, the second-level heat dissipation mode is started. The conveying part 16 extracts liquid nitrogen from the liquid nitrogen storage tank 3 and transports the liquid nitrogen to the second blocking strip 9 through the metering valve 18 and the connecting pipe 20. The metering valve 18 measures the liquid nitrogen entering the second blocking strip 9. When the preset value is reached, the metering valve 18 can close the upper end of the connecting pipe 20, so that the liquid nitrogen can enter other second blocking strips 9, so that the liquid nitrogen can evenly enter multiple second blocking strips 9, improving the uniformity of heat dissipation. When the liquid nitrogen enters the conveying part 16 and the second blocking strip 9, part of the liquid nitrogen will quickly vaporize, reducing the temperature of the conveying part 16 and the second blocking strip 9. The remaining liquid nitrogen will continue to flow along the conveying part 16 and the second blocking strip 9. Since the amount of liquid nitrogen is small, the liquid nitrogen entering the second blocking strip 9 will quickly vaporize when flowing on multiple inclined plates 23, so that the low-temperature nitrogen gas can fill the inside of the second blocking strip 9 and be discharged through the air outlet holes 14. At the same time, the fan 27 continuously blows external air into the cabinet body 1. The low-temperature mixed gas of air and low-temperature nitrogen gas can be blown to different positions of the power equipment 13 under the guidance of multiple second blocking strips 9, quickly reducing the temperature of the power equipment 13. When the air pressure inside the conveying part 16 exceeds the threshold, a part of the gas inside the conveying part 16 is discharged through the external air outlet structure.

[0033] When the temperature of the power device 13 exceeds the second threshold, it indicates that a fire has occurred due to the excessive temperature of the power device 13 at this time. The three-level heat dissipation mode is activated, and the power device 13 is immediately powered off. Subsequently, the driving part 17 drives a plurality of synchronous wheels 19 to rotate, so that a plurality of second blocking bars 9 and two first blocking bars 8 are arranged in a straight line, and adjacent blocking bars are in contact with each other. Both of the two first blocking bars 8 are in contact with the inner wall of the cabinet body 1, and the installation cavity where the power device 13 is located can be separated from the heat dissipation cavity. Subsequently, a large amount of liquid nitrogen in the liquid nitrogen storage tank 3 is extracted into a plurality of second blocking bars 9 through the conveying part 16, and the metering valve 18 enables the liquid nitrogen to enter the plurality of second blocking bars 9 evenly. At this time, the amount of liquid nitrogen is large, and the through holes 24 are used for the liquid nitrogen to pass through. At the same time, the lower end of the T-shaped connecting rod 21 is continuously and rapidly knocked through the connecting pipe 20, so that the T-shaped connecting rod 21 and the second blocking bar 9 vibrate, which can improve the falling rate of the liquid nitrogen. A part of the liquid nitrogen vaporizes and is discharged through the air outlet 14, so that the power devices 13 at different positions can be quickly cooled. The low-temperature nitrogen can quickly reduce the temperature of the power device 13, and the mixed gas and the subsequent nitrogen are discharged through the second exhaust part 11.

[0034] When the staff come to handle it and open the cabinet door 2, the cabinet door 2 will pull the connecting rope 38 to move the first blocking bar 8, so that the second spring 34 can be stretched. At this time, there is a gap between the first blocking bar 8 and the second blocking bar 9. When the infrared rangefinder 37 detects the movement of the first blocking bar 8, air is continuously blown into the cabinet body 1 through the blower 27, and at the same time, a warning is issued through the buzzer 32 to prompt the staff to suspend entering. At this time, the air blows from the gap between the first blocking bar 8 and the second blocking bar 9 to the mounting plate 12 to displace the nitrogen in the cabinet body 1. When the gas detector on the second exhaust part 11 detects that the nitrogen concentration in the discharged gas is close to the nitrogen concentration in the air, the buzzer 32 stops warning, and the staff can pull out the power device 13 from the inside of the cabinet body 1 for maintenance, reducing the maintenance blind area and being beneficial to the maintenance process.

[0035] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric control cabinet for a well-type nitriding furnace, comprising a cabinet body (1), the outer wall of the cabinet body (1) is rotatably connected with a cabinet door (2), characterized in that, An installation plate (12) is installed in the cabinet body (1) through an installation component. A baffle component is arranged on one side of the installation plate (12) close to the cabinet door (2). An installation cavity is arranged between the installation plate (12) and the baffle component, and a heat dissipation cavity is arranged between the baffle component and the cabinet door (2). A plurality of power devices (13) are fixedly installed on the installation plate (12), and the power devices (13) are located in the installation cavity. A temperature detection device is arranged on the power device (13), and the temperature detection device is provided with a first threshold and a second threshold. The baffle component includes two first blocking strips (8). One side of each of the two first blocking strips (8) away from each other is in contact with the inner wall of the cabinet body (1). A plurality of second blocking strips (9) are evenly arranged between the two first blocking strips (8). A driving part (17) and a liquid nitrogen delivery component are arranged in the cabinet body (1). The driving part (17) is used to drive the plurality of second blocking strips (9) to rotate, and the liquid nitrogen delivery component is used to deliver liquid nitrogen into the plurality of second blocking strips (9). A plurality of air outlet holes (14) are evenly formed in one side of the second blocking strip (9) close to the power device (13). A ventilation component corresponding to the position of the heat dissipation cavity is arranged on the outer wall of the cabinet body (1).

2. The electric control cabinet of the well-type nitriding furnace according to claim 1, characterized in that, The installation component includes a top plate (6) and a bottom plate (5) fixedly installed at the top and bottom of the installation plate (12). Chute grooves (101) are formed at the top and bottom of the inner wall of the cabinet body (1). The top plate (6) and the bottom plate (5) are both slidably connected to the chute grooves (101) at corresponding positions through trapezoidal sliding strips (7) fixedly connected thereto. A magnetic plate (15) is fixedly installed on the side wall of the trapezoidal sliding strip (7), and a magnetic block magnetically connected to the magnetic plate (15) is fixedly installed in the chute groove (101).

3. The electric control cabinet of the well-type nitriding furnace according to claim 2, characterized in that, Sliding grooves (35) corresponding to the positions of the first blocking strips (8) are formed in the top plate (6) and the bottom plate (5). Sliding strips (36) are fixedly installed at the top and bottom ends of the first blocking strip (8), and the sliding strips (36) are slidably connected to the sliding grooves (35) at corresponding positions. The first blocking strip (8) is elastically connected to the installation plate (12) through a plurality of second springs (34). A hook is fixedly installed on the inner side of the cabinet door (2). The first blocking strip (8) is connected to the hook through a connecting rope (38). An infrared rangefinder (37) for detecting the displacement of the first blocking strip (8) is arranged on the top of the bottom plate (5).

4. The electric control cabinet of the well-type nitriding furnace according to claim 2, characterized in that, The bottoms of the plurality of second blocking strips (9) are rotatably connected to the bottom plate (5) through T-shaped connecting rods (21). A plurality of electric telescopic rods (22) are fixedly installed inside the bottom plate (5). The plurality of electric telescopic rods (22) correspond to the positions of the plurality of T-shaped connecting rods (21) respectively. The electric telescopic rod (22) is used to strike the lower end of the T-shaped connecting rod (21).

5. The electric control cabinet of the well-type nitriding furnace according to claim 2, characterized in that, The driving part (17) comprises a synchronous belt and a motor, the motor is fixedly mounted on the top of the inner wall of the top plate (6), the output end of the motor is fixedly connected to a driving wheel, the tops of the plurality of second blocking bars (9) are fixedly connected to a connecting pipe (20), and the outer wall of each connecting pipe (20) is fixedly mounted with a synchronous wheel (19), the synchronous belt is sleeved around the periphery of the driving wheel and the plurality of synchronous wheels (19), and meshes with the driving wheel and the synchronous wheel (19), a plurality of groups of limiting columns are fixedly mounted on the bottom of the inner wall of the top plate (6), the plurality of groups of limiting columns correspond to the positions of the plurality of synchronous wheels (19), and each limiting column is in contact with a non-meshing side of the synchronous belt, and the limiting column is used to squeeze the synchronous belt to generate elastic deformation in the direction of the synchronous wheel (19).

6. The electric control cabinet of the well-type nitriding furnace according to claim 5, characterized in that, The liquid nitrogen delivery assembly comprises a liquid nitrogen storage tank (3) fixedly mounted on the top of the cabinet (1); a delivery portion (16) in communication with the liquid nitrogen storage tank (3) is fixedly mounted inside the top plate (6); a metering valve (18) is rotatably connected to the top of the connecting pipe (20); and the upper end of the metering valve (18) is fixedly connected to the delivery portion (16).

7. The electric control cabinet of the well-type nitriding furnace according to claim 1, characterized in that, The ventilation assembly comprises a fan (27), the fan (27) being fixedly mounted on the outer wall of the cabinet (1) via a fixing ring (26), and the air outlet direction of the fan (27) facing the heat dissipation cavity, and an end of the fixing ring (26) away from the cabinet (1) being threadedly connected to a mounting shell (4), and a cleaning assembly being arranged inside the mounting shell (4).

8. The electric control cabinet of the well-type nitriding furnace according to claim 7, characterized in that, The cleaning component comprises a second U-shaped frame (33) fixedly mounted on the top of the mounting shell (4); a first U-shaped frame (31) is fixedly mounted on the bottom of the inner wall of the mounting shell (4); a porous plate (28) is arranged between the first U-shaped frame (31) and the second U-shaped frame (33); the porous plate (28) is slidably connected to the first U-shaped frame (31) and the second U-shaped frame (33); the bottom of the porous plate (28) is elastically connected to the first U-shaped frame (31) via a first spring (30); the interior of the porous plate (28) is filled with a moisture absorbent; a dust removal net (29) is fixedly mounted inside the mounting shell (4); the dust removal net (29) is located on a side of the porous plate (28) away from the fan (27); a pressure sensor is fixedly mounted on the bottom of the porous plate (28); and a buzzer (32) is fixedly mounted on the outer wall of the fixing ring (26).

9. The electric control cabinet of the well-type nitriding furnace according to claim 1, characterized in that, A first exhaust portion (10) and a second exhaust portion (11) are provided on a side of the cabinet body (1) away from the cabinet door (2); a plurality of through holes are provided on the mounting plate (12); the second exhaust portion (11) is located below the first exhaust portion (10); and a gas detector for detecting nitrogen emission concentration is provided on the second exhaust portion (11).

10. The electric control cabinet of the well-type nitriding furnace according to claim 1, characterized in that, A plurality of inclined plates (23) are evenly and fixedly mounted on the inner wall of the second blocking bar (9) in the height direction. The plurality of inclined plates (23) are staggered and cross-distributed. Through holes (24) are provided on the inclined plates (23). A retaining groove (25) is provided on the top of the inclined plates (23).

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