An electric control cabinet for a pit-type nitriding furnace

Abstract

The present invention relates to the technical field of electric control cabinets, and in particular to an electric control cabinet for a pit-type nitriding furnace, comprising a cabinet body, the outer wall of the cabinet body being rotatably connected to a cabinet door, a mounting plate being installed in the cabinet body through a mounting assembly, a baffle assembly being provided on the side of the mounting plate close to the cabinet door, a plurality of electrical equipment being fixedly mounted on the mounting plate, a temperature detection device being provided on the electrical equipment, the baffle assembly comprising two first blocking bars, a plurality of second blocking bars being evenly provided between the two first blocking bars, and a drive unit and a liquid nitrogen delivery assembly being provided in the cabinet body. The present invention ensures uniform heat dissipation by adopting low-energy air cooling combined with a dynamic flow guide design at low temperatures, introducing liquid nitrogen for coordinated air cooling at medium temperatures to form an efficient mixed cooling airflow, automatically isolating the fire source at high temperatures and accelerating the vaporization of liquid nitrogen, rapidly cooling and suppressing the fire, thereby optimizing energy consumption management and improving heat dissipation efficiency, and significantly improving the stability and safety of the operation of the electrical equipment.

Description

Technical Field

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

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

[0003] At present, the existing technology lacks the dynamic adjustment capability based on real-time temperature data, and is unable to flexibly adjust the heat dissipation strategy according to the actual working conditions of the equipment. When the equipment is in a low-temperature state, the system starts a high-energy consumption strong heat dissipation mode due to the lack of intelligent perception, resulting in unnecessary energy waste. At the same time, the traditional fan ventilation and heat dissipation method can easily lead to uneven heat dissipation of the equipment and local overheating, increasing the risk of faults such as short circuits and shortening the service life of the equipment. In addition, the electrical control cabinet of the pit-type nitriding furnace has a higher voltage than that of ordinary electrical control cabinets. When the equipment temperature exceeds the safety threshold, it is more likely to cause a fire. The traditional electrical control cabinet cannot take effective measures in time due to the lack of an emergency response mechanism, and it is very easy to cause major safety hazards due to thermal runaway, which makes the equipment less practical. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the electric control cabinet lacks the dynamic adjustment capability based on real-time temperature, resulting in poor heat dissipation effect, and to propose an electric control cabinet for a pit-type nitriding furnace.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an electric control cabinet for a pit-type nitriding furnace, comprising a cabinet body, the outer wall of the cabinet body is rotatably connected to a cabinet door, a mounting plate is installed in the cabinet body through a mounting assembly, a baffle assembly is provided on the side of the mounting plate close to the cabinet door, a mounting cavity is provided between the mounting plate and the baffle assembly, and a heat dissipation cavity is provided between the baffle assembly and the cabinet door, a plurality of electrical equipment are fixedly installed on the mounting plate, and the electrical equipment is located in the mounting cavity, a temperature detection device is provided on the electrical equipment, and the temperature detection device is provided with a first threshold value and a second threshold value, and the baffle assembly includes two first baffles Bars, the sides of the two first blocking bars away from each other are in contact with the inner wall of the cabinet, a plurality of second blocking bars are evenly arranged between the two first blocking bars, a driving part and a liquid nitrogen delivery assembly are provided in the cabinet, the driving part is used to drive the plurality of second blocking bars to rotate, the liquid nitrogen delivery assembly is used to deliver liquid nitrogen into the plurality of second blocking bars, a plurality of air outlet holes are evenly opened on the side of the second blocking bar close to the power equipment, the outer wall of the cabinet is provided with a ventilation assembly corresponding to the position of the heat dissipation cavity, the ventilation assembly includes a fan, the fan is fixedly mounted on the outer wall of the cabinet through a fixing ring, and the air outlet direction of the fan is facing the heat dissipation cavity;

[0006] When the temperature of the power equipment is lower than the first threshold, the first-level heat dissipation mode is activated, the fan blows in air and cooperates with the driving unit to drive the second blocking bar to rotate slightly forward and reverse to dissipate heat; when the temperature of the power equipment is between the first threshold and the second threshold, the second-level heat dissipation mode is activated, and liquid nitrogen is introduced for heat dissipation; when the temperature of the power equipment exceeds the second threshold, the third-level heat dissipation mode is activated and the power is cut off, the driving unit drives the second blocking bar to be arranged and contacted with the first blocking bar, separating the installation cavity from the heat dissipation cavity, and drawing a large amount of liquid nitrogen into the second blocking bar.

[0007] Preferably, the mounting assembly includes a top plate and a bottom plate fixedly mounted on the top and bottom of the mounting plate, and slide grooves are provided on the top and bottom of the inner wall of the cabinet. The top plate and the bottom plate are slidably connected to the slide grooves at corresponding positions through trapezoidal slides fixedly connected thereto, and a magnetic plate is fixedly mounted on the side wall of the trapezoidal slide, and a magnetic block magnetically connected to the magnetic plate is fixedly mounted in the slide groove.

[0008] Preferably, sliding grooves are provided on the top plate and the bottom plate at positions corresponding to the first blocking bar, sliding bars are fixedly installed at the top and bottom ends of the first blocking bar, and the sliding bars are slidably connected to the sliding grooves at corresponding positions, the first blocking bar is elastically connected to the mounting plate through a plurality of second springs, a hook is fixedly installed on the inside of the cabinet door, the first blocking bar is connected to the hook through a connecting rope, and an infrared rangefinder for detecting the displacement of the first blocking bar is provided on the top of the bottom plate.

[0009] Preferably, the bottoms of the multiple second blocking bars are rotatably connected to the base plate through T-shaped connecting rods, and multiple electric telescopic rods are fixedly installed inside the base plate. The multiple electric telescopic rods correspond to the positions of the multiple T-shaped connecting rods respectively, and the electric telescopic rods are used to knock the lower ends of the T-shaped connecting rods.

[0010] 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 the driving wheel, the tops of the multiple second blocking bars 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 multiple synchronous wheels, and meshes with the driving wheel and the synchronous wheel, and multiple groups of limiting columns are fixedly mounted on the bottom of the inner wall of the top plate, the multiple groups of limiting columns correspond to the positions of the multiple synchronous wheels respectively, and each limiting column contacts the non-meshing side of the synchronous belt, and the limiting columns are used to squeeze the synchronous belt to produce elastic deformation in the direction of the synchronous wheel.

[0011] 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 the upper end of the metering valve is fixedly connected to the delivery portion.

[0012] Preferably, one end of the fixing ring away from the cabinet is threadedly connected to a mounting shell, and a cleaning component is arranged in the mounting shell.

[0013] Preferably, the cleaning component includes a second U-shaped frame fixedly mounted on the top of the mounting shell, a first U-shaped frame fixedly mounted 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 slidingly 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 mounted 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 mounted on the bottom of the porous plate, and a buzzer is fixedly mounted on the outer wall of the fixed ring.

[0014] Preferably, a first exhaust portion and a second exhaust portion are provided on the 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.

[0015] Preferably, a plurality of inclined plates are evenly fixedly installed on the inner wall of the second blocking bar along the height direction, and 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.

[0016] Compared with the existing technology, the advantages of the present invention are:

[0017] 1. The present invention starts the first-level heat dissipation mode when the temperature of the power equipment is lower than the first threshold value. The fan blows in air and cooperates with the synchronous wheel to drive the second blocking bar to rotate slightly forward and reverse to dissipate heat, avoiding starting the high-energy consumption strong heat dissipation mode when the equipment temperature is low, reducing the overall energy consumption of the system and saving energy. The slight forward and reverse rotation of the second blocking bar 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 relatively low heating state, maintaining the normal operating temperature of the equipment, and preventing the equipment from overheating due to gradual temperature accumulation.

[0018] 2. The present invention activates the secondary heat dissipation mode when the temperature of the power equipment is between the first threshold and the second threshold, and introduces liquid nitrogen for heat dissipation. The vaporization of liquid nitrogen absorbs 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 barrier bar and quickly vaporizes. The low-temperature nitrogen is discharged through the air outlet. At the same time, the fan blows in external air to form a low-temperature mixed gas of air and low-temperature nitrogen. Under the guidance of multiple second barrier bars, this mixed gas can be blown to different positions of the power equipment, optimizing the heat dissipation path, so that the heat can be taken away more comprehensively, and ensuring that the equipment operates within an appropriate temperature range.

[0019] 3. When the temperature of the power equipment exceeds the second threshold, the present invention activates the third-level heat dissipation mode and cuts off the power. The second barrier bar is driven by the synchronous wheel to align and contact with the first barrier bar, separating the installation cavity from the heat dissipation cavity, which can effectively prevent the spread of fire and prevent the fire from spreading to other areas of the cabinet, avoiding causing a larger-scale safety accident. A large amount of liquid nitrogen is pumped into the second barrier bar, and the second barrier bar is vibrated by knocking it with an electric telescopic rod, increasing the falling rate of the liquid nitrogen and accelerating the vaporization rate of the liquid nitrogen, thereby quickly reducing the temperature of the power equipment, effectively suppressing the development of the fire, buying time for subsequent processing, and minimizing irreversible damage to the equipment caused by high temperature.

[0020] 4. The present invention measures the liquid nitrogen entering each second barrier bar through a metering valve, ensuring that the liquid nitrogen evenly enters the interior of the multiple second barrier bars. The retention groove can temporarily retain the liquid nitrogen, extending its residence time in the second barrier bar, so that the liquid nitrogen can more fully absorb the surrounding heat for vaporization, while the through-hole allows the liquid nitrogen to flow continuously to avoid local accumulation. The two work together to achieve orderly vaporization and flow of liquid nitrogen, ensuring the stability of the vaporization process, preventing the safety hazard caused by a sudden pressure increase due to excessive vaporization, and avoiding the impact of heat dissipation due to poor flow, thereby improving the reliability of the heat dissipation system. In addition, the part of the liquid nitrogen intercepted by the retention groove is discharged from the adjacent air outlet after vaporization, so that the low-temperature nitrogen can evenly cover the power equipment at different locations, avoiding local overheating, ensuring that each device can obtain effective heat dissipation, and improving the overall heat dissipation uniformity.

[0021] 5. The present invention uses a fan to transport clean air that has been dust-removed by a dust removal net and moisture-absorbed by a porous plate into the cabinet, effectively preventing dust and moisture from adhering to electrical equipment, avoiding problems such as poor heat dissipation, short circuit or corrosion caused by moisture, and insulation degradation caused by dust accumulation, and significantly improving equipment stability and life. When the desiccant is saturated, the porous plate sinks, triggering the pressure sensor and activating the buzzer alarm, prompting timely replacement and maintenance. The mounting shell and the fixing ring are threaded. When disassembling, you only need to unscrew the shell to replace the porous plate or dust removal net without the need for additional tools, thereby improving maintenance efficiency.

[0022] In summary, the present invention achieves a balance between high-efficiency energy saving and safety protection by setting three heat dissipation modes: at low temperatures, low-energy 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 an efficient mixed cooling airflow; at high temperatures, the fire source is automatically isolated and the vaporization of liquid nitrogen is accelerated to quickly cool down and suppress the fire. This stepped heat dissipation mode not only optimizes energy consumption management, but also improves heat dissipation efficiency, and at the same time has an active fire prevention function, which significantly improves the stability and safety of power equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an electric control cabinet for a pit-type nitriding furnace proposed in the present invention;

[0024] Figure 2 This is a schematic structural diagram of the first and second blocking bars of the electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0025] Figure 3 This is a structural schematic diagram of the first exhaust part and the second exhaust part of the electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of an electric control cabinet of a pit-type nitriding furnace proposed in the present invention;

[0027] Figure 5 This is a cross-sectional view of the bottom plate and top plate of the electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0028] Figure 6 for Figure 5 A schematic diagram of the structure at center A;

[0029] Figure 7 for Figure 5 A magnified schematic diagram of the structure at point B in the middle;

[0030] Figure 8 This is a cross-sectional view of a second barrier bar of an electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0031] Figure 9 This is a cross-sectional view of the installation housing and fixing ring of the electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0032] Figure 10 This is a schematic diagram of the first blocking bar and the second spring structure of the electric control cabinet of a pit-type nitriding furnace proposed by the present invention;

[0033] Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point C in the middle.

[0034] In the figure: 1 cabinet, 101 slide, 2 cabinet door, 3 liquid nitrogen storage tank, 4 mounting shell, 5 bottom plate, 6 top plate, 7 trapezoidal slide, 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, 15 magnetic plate, 16 conveying part, 17 driving part, 18 metering valve, 19 synchronous wheel, 20 connecting pipe, 21 T-type connecting rod, 22 electric telescopic rod, 23 inclined plate, 24 through hole, 25 retention groove, 26 fixing ring, 27 fan, 28 porous plate, 29 dust removal net, 30 first spring, 31 first U-shaped frame, 32 buzzer, 33 second U-shaped frame, 34 second spring, 35 slide groove, 36 slide bar, 37 infrared rangefinder, 38 connecting rope. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figures 1 to 11 When the door 2 is closed, the inner side surface of the cabinet 1 is in close contact with the top plate 6, forming an auxiliary positioning structure, which further strengthens the installation position of the top plate 6.

[0037] A baffle assembly is provided between the bottom plate 5 and the top plate 6, and the baffle assembly is located between the mounting plate 12 and the cabinet door 2. A mounting cavity is provided between the mounting plate 12 and the baffle assembly, and a heat dissipation cavity is provided between the baffle assembly and the cabinet door 2. A plurality of electrical devices 13 are fixedly mounted on the mounting plate 12, and the electrical devices 13 are located in the mounting cavity. A temperature detection device is provided on the electrical devices 13, and the temperature detection device is provided with a first threshold value and a second threshold value. A fan 27 is fixedly mounted on the outer wall of the cabinet 1 through a fixing ring 26, and the air outlet direction of the fan 27 is facing the heat dissipation cavity. A detachable mounting shell 4 is threadedly connected to the end of the fixing ring 26 away from the cabinet 1. The second U-shaped frame 33 is fixedly installed on the top of the mounting shell 4, and the first U-shaped frame 31 is fixedly installed 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, and the porous plate 28 is slidably connected to the first U-shaped frame 31 and the second U-shaped frame 33. The restriction of the vertical movement direction of the porous plate 28 by the U-shaped frame ensures the stability of the porous plate 28 during movement, avoiding the occurrence of deviation or jamming. The bottom of the porous plate 28 is elastically connected to the first U-shaped frame 31 by the first spring 30, which can effectively buffer the movement of the porous plate 28. The interior of the porous plate 28 is filled with a moisture absorbent A dust removal net 29 is fixedly installed in the installation shell 4. The dust removal net 29 is located on the side of the porous plate 28 away from the fan 27. Clean air that has passed through the dust removal net 29 and the porous plate 28 to absorb moisture is blown into the cabinet 1 through the fan 27, which can provide a good operating environment for the power equipment 13, prevent dust and moisture from entering the cabinet 1 and adhering to the power equipment 13, and prevent problems such as poor heat dissipation and short circuit caused by dust accumulation, as well as equipment corrosion and insulation performance degradation caused by moisture. Faults such as thereby extending the service life of the power equipment 13 and improving the stability and reliability of the equipment operation are avoided. The weight of the desiccant increases after use. The porous plate 28 will move downward. A pressure sensor is fixedly installed at the bottom of the porous plate 28, and 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 desiccant, 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 desiccant in real time, ensure timely maintenance before the moisture absorption efficiency decreases, and ensure the dryness of the air inside the cabinet 1. When replacing the porous plate 28 or the dust removal net 29, it is only necessary to unscrew the mounting shell 4 to complete the disassembly. No other tools are required during the maintenance process, which significantly improves the maintenance efficiency.

[0038] 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 that are away from each other are in contact with the inner wall of the cabinet 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 connected to a connecting pipe 20, and a synchronous wheel 19 is fixedly installed on the outer wall of the connecting pipe 20. A driving part 17 for driving the plurality of synchronous wheels 19 to rotate is provided inside the top plate 6. The driving part 17 includes 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 the driving wheel. The synchronous belt is sleeved on the periphery of the driving wheel and the plurality of synchronous wheels 19, and meshes with the driving wheel and the synchronous wheel 19. When the temperature detection device detects that the temperature of the power equipment 13 is lower than the first threshold value, 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, and the signal output end of the temperature detection device is connected to the signal input end of the control unit by a wire. The control unit After processing the temperature signal according to the preset program, the start and stop and operation mode of the mechanical structures such as the fan 27 and the drive unit 17 are controlled by the drive circuit. This is the existing technology and will not be repeated here. The fan 27 blows air into the cabinet 1, and the drive unit 17 drives multiple second blocking bars 9 to rotate slightly forward and reverse through the synchronous wheel 19, changing the flow direction and path of the air, so that the air forms a more complex airflow in the cabinet 1, avoiding the straight-line flow of air, allowing the air to more fully contact the electrical equipment 13, increasing the contact area and time between the air and the equipment surface, thereby more effectively taking away heat and improving the heat dissipation efficiency. The rotating second blocking bar 9 can guide the air to the heat dissipation dead corner area that may have existed originally, avoiding the occurrence of local overheating, and ensuring the overall heat dissipation effect of the power equipment 13. A first exhaust portion 10 is provided on the side of the cabinet 1 away from the cabinet door 2, and a plurality of through holes are provided on the mounting plate 12. The through holes cooperate with the first exhaust portion 10 to discharge the air in the cabinet 1.

[0039] A plurality of groups of limit posts are fixedly installed on the bottom of the inner wall of the top plate 6, and the plurality of limit posts correspond to the positions of the plurality of synchronous wheels 19 respectively. Each limit post contacts the non-meshing side of the synchronous belt, causing the synchronous belt to produce elastic deformation in the direction of the synchronous wheel 19, thereby increasing the actual number of meshing teeth between the synchronous wheel 19 and the synchronous belt. A greater number of meshing teeth means that the force transmission is more uniform and stable during the transmission process, which can effectively reduce the slippage of the synchronous belt and ensure that the driving part 17 can reliably transmit the power of the motor to the plurality of synchronous wheels 19, thereby driving the second blocking bar 9 to rotate stably, thereby ensuring the stable operation of the heat dissipation system.

[0040] A liquid nitrogen storage tank 3 is fixedly installed on the top of the cabinet 1, and a conveying part 16 connected to the liquid nitrogen storage tank 3 is fixedly installed inside the top plate 6. The top of the connecting pipe 20 is rotatably connected to the 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 value and the second threshold value, the temperature of the power equipment 13 is higher than the normal operating temperature. At this time, the secondary heat dissipation mode is started, the conveying part 16 is started and liquid nitrogen is extracted from the liquid nitrogen storage tank 3. The liquid nitrogen is transported to the internal cavity of each second blocking bar 9 through multiple metering valves 18 and the connecting pipe 20. The metering valve 18 monitors the liquid nitrogen flow of each branch in real time. When a single second blocking bar 9 reaches a preset perfusion volume, the second blocking bar 9 is turned off. The branch metering valve 18 automatically closes the upper end channel of the connecting pipe 20 and guides the liquid nitrogen to the other second barrier bars 9 that do not meet the standards, ensuring that the liquid nitrogen can be evenly distributed to each second barrier bar 9, avoiding the situation where some second barrier bars 9 have too much or too little liquid nitrogen, and ensuring the uniformity and effectiveness of the overall heat dissipation. The second barrier bars 9 are made of a material that can withstand the flow of liquid nitrogen (such as stainless steel, which has excellent low-temperature toughness and can maintain good strength and toughness at a liquid nitrogen temperature of -196°C), ensuring that the second barrier bars 9 will not break or deform in the low-temperature environment of liquid nitrogen, thereby ensuring the safety and reliability of the liquid nitrogen transportation and heat dissipation system. The second barrier bars 9 A plurality of air outlet holes 14 are provided on the side close to the power equipment 13, and a plurality of inclined plates 23 are evenly fixedly installed on the inner wall of the second blocking bar 9 along the height direction. The plurality of inclined plates 23 are staggered and cross-distributed, and a through hole 24 is provided on the inclined plate 23. The inclined plate 23 is provided with a retention groove 25. The design of the inclined plate 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 plate 23, it fully absorbs external heat, accelerates the vaporization process, ensures the rapid generation of low-temperature nitrogen, and provides an efficient cooling source for the power equipment 13. The air outlet holes 14 cooperate with the vaporization path guided by the inclined plate 23 to make the low-temperature nitrogen evenly diffuse into the interior of the cabinet 1. At the same time, the second blocking bar 9 is small The amplitude rotates forward and backward to further break up the airflow, which is fully mixed with the air blown in by the fan 27 to form a low-temperature mixed gas, accurately covering all parts of the power equipment 13, and realizing all-round and dead-angle heat dissipation. The retention groove 25 can temporarily retain liquid nitrogen and prolong its residence time in the second blocking bar 9. The through hole 24 allows the liquid nitrogen to flow continuously to avoid local accumulation. The two work together to achieve orderly vaporization and flow of liquid nitrogen, preventing a sudden pressure increase due to excessive vaporization, or affecting the heat dissipation effect due to poor flow. The conveying part 16 is connected to the external air outlet structure. When the internal air pressure exceeds the threshold, the excess gas is automatically discharged to effectively prevent the risk of explosion caused by excessive air pressure due to liquid nitrogen vaporization.

[0041] 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 holes 24. The bottom of each second blocking bar 9 is rotatably connected to the bottom plate 5 through a T-shaped connecting rod 21, and a plurality of electric telescopic rods 22 are fixedly installed inside the bottom plate 5. The multiple electric telescopic rods 22 correspond to the positions of the multiple 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, causing the second blocking bar 9 to vibrate, effectively increasing the falling rate of the liquid nitrogen. The faster falling rate means that the liquid nitrogen can contact structures such as the inclined plate 23 more quickly, increasing the contact area between the liquid nitrogen and the surrounding air, thereby accelerating the vaporization of the liquid nitrogen, and a large amount of vaporized liquid nitrogen forms low-temperature nitrogen gas and enters from the outlet 14 The installation cavity can quickly take away the heat of the electrical 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 wins more emergency response time for the staff and reduces the risk of major losses caused by the fire. A second exhaust part 11 is provided on the side of the cabinet 1 away from the cabinet door 2. The second exhaust part 11 is located below the first exhaust part 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. It also meets environmental protection and safety requirements. When the liquid nitrogen moves on multiple inclined plates 23, the retention groove 25 can continuously retain part of the liquid nitrogen. After these liquid nitrogen vaporizes, they are discharged from the nearby air outlet 14, so that the electrical equipment 13 at different positions can be evenly covered by low-temperature nitrogen, avoiding local overheating, ensuring that each device can obtain effective heat dissipation, and improving the overall heat dissipation uniformity.

[0042] The positions of the top plate 6 and the bottom plate 5 corresponding to the first blocking bar 8 are both provided with sliding grooves 35, and the top and bottom ends of the first blocking bar 8 are fixedly installed with sliding bars 36, and the sliding bars 36 are slidably connected to the sliding grooves 35 at the corresponding positions, and the first blocking bar 8 is elastically connected to the mounting plate 12 through a plurality of second springs 34. A hook is fixedly installed on the inside of the cabinet door 2, and the first blocking bar 8 is connected to the hook through a connecting rope 38. After the equipment starts the third-level heat dissipation mode, the staff performs maintenance on the equipment. At this time, the cabinet 1 may be filled with a large amount of nitrogen. The buzzer 32 sounds a warning, prompting the staff to temporarily postpone entering the cabinet 1 to prevent the staff from entering the cabinet 1 filled with nitrogen without knowing it, thereby ensuring the safety of the staff. The staff opens the cabinet door 2 and pulls the first blocking bar 8 to slide through the connecting rope 38, so that a gap is formed between the first blocking bar 8 and the second blocking bar 9. An infrared The rangefinder 37 and the infrared rangefinder 37 detect the movement of the first blocking bar 8, and the fan 27 continuously blows air into the cabinet 1 to replace the nitrogen in the installation cavity. The second exhaust part 11 is provided with a gas detector. When the gas detector detects that the nitrogen concentration in the exhaust gas is close to normal, the buzzer 32 stops the alarm to ensure that the nitrogen in the cabinet has been basically discharged when the staff enters, avoiding suffocation of the staff due to excessive nitrogen concentration, and effectively ensuring the safety of personnel. The second exhaust part 11 is located lower, and nitrogen is heavier than air. This design conforms to the physical properties of the gas and facilitates the replacement and discharge of nitrogen. Blowing air through the fan 27 can more efficiently discharge the nitrogen inside the cabinet 1, accelerate the gas replacement process, and improve the effect and efficiency of gas replacement. When the cabinet door 2 is closed, the second spring 34 can drive the first blocking bar 8 to reset, ensuring the stability of the position of the first blocking bar 8 under normal conditions.

[0043] 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 value, the first-level heat dissipation mode is started, and air is blown into the interior of the cabinet 1 through the fan 27. At the same time, the driving unit 17 drives the multiple synchronous wheels 19 to rotate slightly forward and reverse, so that the multiple second blocking bars 9 also rotate slightly forward and reverse. When the air passes through the porous plate 28 and the dust removal net 29, the dust and moisture inside will be absorbed by the desiccant inside the porous plate 28 and the dust removal net 29. The clean air can pass through the multiple second blocking bars 9 and blow onto the power equipment 13. Then the air passes through The first exhaust part 10 discharges air from the cabinet 1, thereby realizing heat dissipation of the power equipment 13. The small forward and reverse rotation of multiple second blocking bars 9 can blow air to different positions of the power equipment 13, effectively improving the heat dissipation effect. The weight of the desiccant inside the porous plate 28 will gradually increase after use, causing the porous plate 28 to gradually squeeze the first spring 30 to move downward. When the bottom pressure sensor of the porous plate 28 contacts the first U-shaped frame 31, a buzzer prompt will be issued through the buzzer 32, indicating that the porous plate 28 needs to be replaced. The mounting shell 4 and the fixing ring 26 are threadedly connected, which is convenient for replacing the porous plate 28 and the dust removal net 29.

[0044] When the temperature of the power equipment 13 is between the first threshold and the second threshold, the secondary heat dissipation mode is started, the conveying part 16 extracts the liquid nitrogen in the liquid nitrogen storage tank 3, and conveys the liquid nitrogen to the second barrier bar 9 through the metering valve 18 and the connecting pipe 20. The metering valve 18 measures the liquid nitrogen entering the second barrier bar 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 the other second barrier bars 9, so that the liquid nitrogen can evenly enter the interior of multiple second barrier bars 9, thereby improving the uniformity of heat dissipation. When the liquid nitrogen enters the conveying part 16 and the second barrier bar 9, part of the liquid nitrogen will quickly vaporize, so that the conveying part 16 and The temperature of the second barrier bar 9 decreases, and the remaining liquid nitrogen will continue to flow along the conveying portion 16 and the second barrier bar 9. Due to the small amount of liquid nitrogen, the liquid nitrogen entering the second barrier bar 9 will quickly vaporize when flowing on the multiple sets of inclined plates 23, so that the low-temperature nitrogen can fill the second barrier bar 9 and be discharged through the air outlet 14. At the same time, the fan 27 continuously blows external air into the cabinet 1. The low-temperature mixed gas of air and low-temperature nitrogen can be blown to different positions of the power equipment 13 under the guidance of multiple second barrier bars 9, quickly reducing the temperature of the power equipment 13. When the internal air pressure of the conveying portion 16 exceeds the threshold, part of the gas inside the conveying portion 16 is discharged through the external air outlet structure.

[0045] When the temperature of the power equipment 13 exceeds the second threshold, it indicates that the temperature of the power equipment 13 is too high and a fire occurs. The third-level heat dissipation mode is activated, and the power equipment 13 is immediately powered off. Subsequently, the driving unit 17 drives the multiple synchronous wheels 19 to rotate, so that the multiple second blocking bars 9 and the two first blocking bars 8 are arranged in a straight line, and the adjacent blocking bars are in contact with each other. The two first blocking bars 8 are in contact with the inner wall of the cabinet 1, which can separate the installation cavity where the power equipment 13 is located from the heat dissipation cavity. Subsequently, the liquid nitrogen inside the liquid nitrogen storage tank 3 is extracted in large quantities into the multiple second blocking bars 9 through the conveying unit 16. The metering valve 18 allows the liquid nitrogen to evenly enter the interior of the multiple second barrier bars 9. At this time, the amount of liquid nitrogen is large, and the through hole 24 is used to allow the liquid nitrogen to pass through. At the same time, the lower end of the T-shaped connecting rod 21 is continuously and quickly struck by the connecting pipe 20, so that the T-shaped connecting rod 21 and the second barrier bar 9 are vibrated, which can increase the falling rate of the liquid nitrogen. After a part of the liquid nitrogen is vaporized, it is discharged through the air outlet 14, so that the power equipment 13 at different positions can be quickly cooled down. The low-temperature nitrogen can quickly reduce the temperature of the power equipment 13, and the mixed gas and subsequent nitrogen are discharged through the second exhaust part 11.

[0046] When the staff arrives to deal with the problem and opens the cabinet door 2, the cabinet door 2 will pull the connecting rope 38 to move the first blocking bar 8, thereby stretching the second spring 34. 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 interior of the cabinet 1 through the fan 27, and at the same time, an alarm is issued through the buzzer 32, prompting the staff to postpone entering. At this time, the air is blown from the gap between the first blocking bar 8 and the second blocking bar 9 to the mounting plate 12, replacing the nitrogen inside the cabinet 1. When the gas detector on the second exhaust part 11 detects that the nitrogen concentration in the exhausted gas is close to the nitrogen concentration in the air, the buzzer 32 stops the alarm, and the staff can pull the electrical equipment 13 out of the cabinet 1 for inspection, reducing maintenance blind spots and facilitating the maintenance process.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric control cabinet for a pit-type nitriding furnace, comprising a cabinet body (1), wherein the outer wall of the cabinet body (1) is rotatably connected to a cabinet door (2), characterized in that: A mounting plate (12) is installed in the cabinet (1) through a mounting assembly, a baffle assembly is provided on a side of the mounting plate (12) close to the cabinet door (2), a mounting cavity is provided between the mounting plate (12) and the baffle assembly, and a heat dissipation cavity is provided 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 mounting cavity, a temperature detection device is provided on the power devices (13), and the temperature detection device is provided with a first threshold value and a second threshold value, the baffle assembly includes two first blocking bars (8), the two first blocking bars (8) having sides away from each other both in contact with the inner wall of the cabinet (1), and the two first blocking bars (8) are in contact with the inner wall of the cabinet (1), and the two first blocking bars (8) are in contact with the inner wall of the cabinet (1). A plurality of second blocking bars (9) are evenly arranged between the first blocking bar (8); a driving unit (17) and a liquid nitrogen delivery assembly are arranged in the cabinet (1); the driving unit (17) is used to drive the plurality of second blocking bars (9) to rotate; the liquid nitrogen delivery assembly is used to deliver liquid nitrogen into the plurality of second blocking bars (9); a plurality of air outlet holes (14) are evenly opened on a side of the second blocking bar (9) close to the power equipment (13); a ventilation assembly corresponding to the position of the heat dissipation cavity is arranged on the outer wall of the cabinet (1); the ventilation assembly includes a fan (27); the fan (27) is fixedly mounted on the outer wall of the cabinet (1) through a fixing ring (26), and the air outlet direction of the fan (27) faces the heat dissipation cavity; When the temperature of the power equipment is less than a first threshold value, the first-level heat dissipation mode is activated, the fan (27) blows in air and cooperates with the drive unit (17) to drive the second blocking bar (9) to rotate slightly forward and reverse to dissipate heat; when the temperature of the power equipment is between the first threshold value and the second threshold value, the second-level heat dissipation mode is activated, and liquid nitrogen is introduced for heat dissipation; when the temperature of the power equipment exceeds the second threshold value, the third-level heat dissipation mode is activated and the power is cut off, the drive unit (17) drives the second blocking bar (9) to be arranged and contacted with the first blocking bar (8), separating the installation cavity from the heat dissipation cavity, and extracting a large amount of liquid nitrogen into the second blocking bar (9).

2. The electric control cabinet of the pit type nitriding furnace according to claim 1, characterized in that: The mounting assembly comprises a top plate (6) and a bottom plate (5) fixedly mounted on the top and bottom of the mounting plate (12); a slide groove (101) is provided on the top and bottom of the inner wall of the cabinet (1); the top plate (6) and the bottom plate (5) are slidably connected to the slide groove (101) at corresponding positions via a trapezoidal slide bar (7) fixedly connected thereto; a magnetic plate (15) is fixedly mounted on the side wall of the trapezoidal slide bar (7); and a magnetic block magnetically connected to the magnetic plate (15) is fixedly mounted in the slide groove (101).

3. The electric control cabinet of the pit type nitriding furnace according to claim 2, characterized in that: The top plate (6) and the bottom plate (5) are both provided with sliding grooves (35) at positions corresponding to the first blocking bar (8), and the top and bottom ends of the first blocking bar (8) are both fixedly mounted with sliding bars (36), and the sliding bars (36) are slidably connected to the sliding grooves (35) at corresponding positions, and the first blocking bar (8) is elastically connected to the mounting plate (12) via a plurality of second springs (34), and a hook is fixedly mounted on the inner side of the cabinet door (2), and the first blocking bar (8) is connected to the hook via a connecting rope (38), and an infrared rangefinder (37) for detecting the displacement of the first blocking bar (8) is provided on the top of the bottom plate (5).

4. The electric control cabinet of the pit type nitriding furnace according to claim 2, characterized in that: The bottoms of the plurality of second blocking bars (9) are rotatably connected to the base plate (5) via T-shaped connecting rods (21); a plurality of electric telescopic rods (22) are fixedly installed inside the base 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) are used to knock the lower ends of the T-shaped connecting rods (21).

5. The electric control cabinet of the pit type nitriding furnace according to claim 2, characterized in that: The driving part (17) includes 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 the 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), the bottom of the inner wall of the top plate (6) is fixedly mounted with a plurality of groups of limiting columns, the plurality of groups of limiting columns respectively corresponding to the positions of the plurality of synchronous wheels (19), and each limiting column is in contact with the non-meshing side of the synchronous belt, and the limiting columns are 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 pit 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 pit type nitriding furnace according to claim 1, characterized in that: One end of the fixing ring (26) away from the cabinet (1) is threadedly connected to a mounting shell (4), and a cleaning component is provided in the mounting shell (4).

8. The electric control cabinet of the pit 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 in the mounting shell (4), and 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 pit 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 pit type nitriding furnace according to claim 1, characterized in that: A plurality of inclined plates (23) are evenly fixedly mounted on the inner wall of the second blocking bar (9) along 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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