Cabinet sealing assembly and sealed transformer substation mechanism box

Abstract

The invention relates to the technical field of substation operation and maintenance, in particular to a cabinet sealing assembly and a sealed substation mechanism case, the cabinet sealing assembly comprises a door body sealing frame, a positive pressure sealing strip, a door frame sealing frame and a door frame connecting strip, and the door body sealing frame and the door frame sealing frame are both of a rectangular frame structure; the cabinet comprises a cabinet body, a front cabinet door, a front inner door, a front door frame, a left cabinet door, a left door frame, a right cabinet door, a right door frame and a cabinet sealing assembly. The mechanism box is reasonable and compact in structure and convenient to use, the door body sealing frame is arranged on the mechanism box cabinet door, the door frame sealing frame is arranged on the door frame, and the sealing performance of the mechanism box can be effectively improved under the interaction and cooperation of the door body sealing frame and the door frame sealing frame; by arranging the positive-pressure sealing strip, the positive-pressure sealing strip can make close contact with the door frame sealing frame when the pressure in the mechanism box is larger than the external pressure, so that the sealing performance of the mechanism box is further improved, and the mechanism box has the advantages of being stable, reliable and good in sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substation operation and maintenance, and relates to a cabinet sealing component and a sealed transformer substation mechanism box. Background Art

[0002] Currently, the sealing performance of substation disconnector or grounding switch mechanism boxes (hereinafter collectively referred to as "mechanism boxes") has been a major challenge hindering the safe and reliable operation of substations. Mechanism boxes are widely used in power systems, such as control cabinets and intelligent component cabinets. They house important electrical components such as contactors, relays, terminal blocks, circuit breakers (circuit breakers), buttons, and cable loops. The proper functioning of these components is critical to ensuring the safe and stable operation of power systems. However, existing mechanism boxes generally have insufficient sealing performance, making them unable to effectively withstand the intrusion of harsh external environments. This makes internal components susceptible to damage, which in turn causes various failures and seriously affects the safe and reliable operation of power systems.

[0003] Specifically, substations in Northwest my country, particularly in Xinjiang, are often exposed to harsh natural environments. Xinjiang boasts an arid climate, low rainfall, and frequent sandstorms, particularly in spring and autumn, characterized by strong winds and sandstorms. Existing sealing structures for the mechanism box often fail to effectively prevent large amounts of dust and sand from entering the box. These tiny particles gradually deposit on the surfaces of electrical components inside the mechanism box, such as the main and auxiliary contacts of the contactor, relay contacts, and wiring terminals, leading to poor contact, decreased conductivity, and even heating and ablation. Furthermore, dust can penetrate the motor operating mechanism, causing wear and jamming of moving parts, leading to operating mechanism failure. In severe cases, this can even create the risk of switch refusal, short circuits, and ground faults. Furthermore, Xinjiang experiences significant temperature swings between day and night, with cold winters. These extreme temperature swings can easily cause the sealing materials in the mechanism box to age and crack, further reducing its sealing performance and allowing moisture to enter the box more easily. Electrical components exposed to this environment for extended periods are also susceptible to corrosion and mildew, further reducing their reliability and service life.

[0004] In addition to the aforementioned challenges posed by inclement weather, the inadequate sealing performance of existing mechanism boxes also presents significant difficulties and safety risks for routine maintenance. To prevent dust and moisture from damaging the internal components of the mechanism boxes, regular dust and moisture removal is required. However, due to the large number of mechanism boxes in a substation (assuming a substation has 200), each maintenance task requires cleaning 200 boxes and unlocking 600 locks, consuming significant manpower and time. Furthermore, these tasks often introduce new safety hazards. For example, using a blower for dust removal can accidentally spray or activate components such as relays and circuit breakers (circuit breakers), causing malfunctions or failures. Due to the inadequate sealing performance of the mechanism box, the probability and frequency of dust and moisture entering the mechanism box increase exponentially, multiplying safety hazards.

[0005] In summary, existing substation mechanism boxes have significant sealing deficiencies, making them ineffective in addressing the harsh environmental challenges of Northwest China, particularly in Xinjiang. This makes internal electrical components susceptible to damage, leading to various failures and posing significant difficulties and safety risks to routine maintenance. Therefore, there is an urgent need to develop a new, highly reliable sealing structure to effectively address these issues, improve the safety and reliability of substation mechanism boxes, and ensure the safe and stable operation of the power system. Summary of the Invention

[0006] The present invention provides a cabinet sealing assembly and a sealed substation mechanism box, which overcome the above-mentioned deficiencies of the prior art and can effectively solve the problem of poor sealing of the existing substation mechanism box.

[0007] One of the technical solutions of the present invention is achieved through the following measures: a cabinet sealing assembly, including a door body sealing frame, a positive pressure sealing strip, a door frame sealing frame and a door frame connecting strip, the door body sealing frame and the door frame sealing frame are both rectangular frame structures, the rear side of the door body sealing frame is provided with an arc groove, the front side of the door frame sealing frame matches the arc groove and is located in the arc groove; the upper lower side, lower upper side, left right side and right left side of the rear side of the door body sealing frame are all provided with positive pressure sealing strips that can contact the door frame sealing frame; the rear side of the door frame sealing frame is provided with an installation groove opening backwards, the installation groove is in the shape of a rectangular frame, and a door frame connecting strip that can be fixedly installed with the door frame is provided in the installation groove.

[0008] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: The above may also include an adjustment pad, and at least one adjustment pad is sequentially arranged from front to back in the installation groove corresponding to the front end position of the door frame connecting strip.

[0009] The above-mentioned doorframe connecting strips located at the upper position, the lower position, the left position, and the right position are respectively the upper doorframe connecting strip, the lower doorframe connecting strip, the left doorframe connecting strip, and the right doorframe connecting strip; the upper doorframe connecting strip includes a front fixing strip, an upper connecting strip, and a rear fixing strip. The front end of the front fixing strip is located in the installation groove, and the rear end of the rear fixing strip can be fixedly installed with the doorframe. An upper connecting strip inclined with the front end higher than the rear end is fixedly installed between the rear end of the front fixing strip and the front end of the rear fixing strip. The lower doorframe connecting strip has the same structure as the upper doorframe connecting strip and is symmetrically arranged up and down; the right doorframe connecting strip includes a left fixing strip, a right connecting strip, and a right fixing strip. The front end of the right fixing strip is located in the installation groove, and the rear end of the left fixing strip can be fixedly installed with the doorframe. A right connecting strip inclined with the left rear end higher than the right front end is fixedly installed between the rear end of the right fixing strip and the front end of the left fixing strip. The left doorframe connecting strip has the same structure as the right doorframe connecting strip and is symmetrically arranged left and right.

[0010] The second technical solution of the present invention is achieved by the following measures: A sealed substation mechanism box using a cabinet sealing component includes a cabinet body, a front cabinet door, a front inner door, a front doorframe, a left cabinet door, a left doorframe, a right cabinet door, a right doorframe, and a cabinet sealing component. The front side, left side, and right side of the cabinet body are respectively provided with a front doorframe, a left doorframe, and a right doorframe in a shape of a rectangle with a hollow center. The front side of the left part of the front doorframe is hinged with the rear side of the left part of the front cabinet door. The left side of the rear part of the left doorframe is hinged with the rear side of the right part of the left cabinet door. The right side of the rear part of the right doorframe is hinged with the rear side of the left part of the right cabinet door. A front inner door is hinged inside the front doorframe; a cabinet sealing component is provided between the front cabinet door and the front doorframe, a cabinet sealing component is provided between the left cabinet door and the left doorframe, and a cabinet sealing component is provided between the right cabinet door and the right doorframe.

[0011] The following is a further optimization and / or improvement of the second technical solution of the above-mentioned invention: The above may further include a control module, a positive pressure dust-proof device, and a differential pressure sensor. The positive pressure dust-proof device includes a positive pressure fan, an air filter, an air inlet pipe, and an air outlet pipe. An air inlet pipe is fixedly connected between the air outlet end of the air filter and the air inlet end of the positive pressure fan. An air inlet is provided on the cabinet body, and an air outlet pipe is fixedly connected between the air inlet and the air outlet end of the positive pressure fan; a differential pressure sensor is provided on the cabinet body, the differential pressure sensor is connected to the control module, and the control module is connected to the positive pressure fan.

[0012] The above-mentioned may also include a booster jet device and a negative pressure suction device. The booster jet device includes a booster pump, an air filter, an air intake valve, an air intake pipeline, a filter pipeline, an air jet main pipe and an air jet branch pipe. A booster pump and an air filter are provided in the cabinet body. An air inlet is provided on the cabinet body. An air inlet pipeline is fixedly connected between the air inlet and the air inlet end of the air filter. A filter pipeline is fixedly connected between the air outlet end of the air filter and the air inlet end of the booster pump filter. The air inlet end of the filter pipeline is fixedly connected to the air inlet end of the air jet main pipe, and the air outlet end of the air jet main pipe is fixedly connected to several air jet branches; the negative pressure suction device includes a dust suction fan, a dust suction main pipe and a dust suction branch pipe. A dust suction fan is provided on the cabinet body. The air inlet end of the dust suction fan is fixedly connected to the dust suction main pipe located in the cabinet body, and the air inlet end of the dust suction main pipe is fixedly connected to several dust suction branches; the control module is connected to the booster pump and the dust suction fan.

[0013] The above-mentioned cabinet body may be provided with a jet main pipe, which is a rectangular ring pipe. Four vertically upward jet branches are fixedly connected to the upper side of the jet main pipe. Several purge holes are provided at intervals above and below the jet branches. The outer side of the jet main pipe is fixedly connected to the air inlet end of the filter pipeline.

[0014] A dust collection main pipe may be provided in the cabinet body. The dust collection main pipe is a rectangular ring pipe. Four horizontal forward dust collection branch pipes are fixedly connected to the front side of the dust collection main pipe. Several dust collection holes are provided on the dust collection branch pipes at intervals in the front and back. The upper side of the dust collection main pipe is fixedly connected to the air inlet end of the dust collection fan.

[0015] The above may also include a temperature and humidity sensor, a low-temperature heater and a dehumidification heater. The temperature and humidity sensor, the low-temperature heater and the dehumidification heater are arranged in the cabinet body. The temperature and humidity sensor is connected to the controller, and the controller is connected to the low-temperature heater and the dehumidification heater.

[0016] The present invention has a reasonable and compact structure and is easy to use. By arranging a door body sealing frame on the mechanism box cabinet door and a door frame sealing frame on the door frame, the interaction and cooperation between the two can effectively improve the sealing performance of the mechanism box; by arranging a positive pressure sealing strip, when the pressure in the mechanism box is greater than the external pressure, the positive pressure sealing strip and the door frame sealing frame can be in close contact, thereby further improving the sealing performance of the mechanism box, and having the characteristics of stability, reliability and good sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 It is a schematic diagram of the main structure of Examples 1 to 2.

[0018] Attachment Figure 2 For attachment Figure 1 Right view structural diagram.

[0019] Attachment Figure 3 For attachment Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0020] Attachment Figure 4 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the partial sealing frame of the middle door body.

[0021] Attachment Figure 5 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the middle door frame connecting strip.

[0022] Attachment Figure 6 Schematic diagrams of the three-dimensional structures of Examples 3 to 6.

[0023] Attachment Figure 7 For attachment Figure 6 Schematic diagram of the three-dimensional structure of the central jet main pipe and jet branch pipe.

[0024] Attachment Figure 8 For attachment Figure 6 Schematic diagram of the three-dimensional structure of the central dust collection main pipe and dust collection branch pipe.

[0025] Attachment Figure 9 This is a circuit block diagram of Examples 5 to 9.

[0026] The codes in the accompanying drawings are: 1 is the door body sealing frame, 2 is the positive pressure sealing strip, 3 is the door frame sealing frame, 4 is the arc groove, 5 is the mounting groove, 6 is the adjustment pad, 7 is the front fixing strip, 8 is the upper connecting strip, 9 is the rear fixing strip, 10 is the left fixing strip, 11 is the right connecting strip, 12 is the right fixing strip, 13 is the lower door frame connecting strip, 14 is the left door frame connecting strip, 15 is the cabinet body, 16 is the front cabinet door, 17 is the front inner door, 18 is the front door frame, 19 is the left cabinet door, 20 is the right cabinet door, 21 is the filter pipeline, 22 is the jet main pipe, 23 is the jet branch pipe, 24 is the dust collection main pipe, and 25 is the dust collection branch pipe. DETAILED DESCRIPTION

[0027] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0028] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.

[0029] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: As shown in the attached Figure 1 、 2As shown in Figures 3, 4 and 5, the cabinet sealing assembly includes a door body sealing frame 1, a positive pressure sealing strip 2, a door frame sealing frame 3 and a door frame connecting strip. The door body sealing frame 1 and the door frame sealing frame 3 are both rectangular frame structures. The rear side of the door body sealing frame 1 is provided with an arc groove 4, and the front side of the door frame sealing frame 3 matches the arc groove 4 and is located in the arc groove 4; the upper lower side, the lower upper side, the left right side and the right left side of the rear side of the door body sealing frame 1 are all provided with a positive pressure sealing strip 2 that can contact the door frame sealing frame 3; the rear side of the door frame sealing frame 3 is provided with a mounting groove 5 with an opening facing backwards, the mounting groove 5 is in the shape of a rectangular frame, and a door frame connecting strip that can be fixedly installed with the door frame is provided in the mounting groove 5. During use, by setting a door body sealing frame 1 on the cabinet door of the mechanism box, and setting a door frame sealing frame 3 on the door frame, the interaction and cooperation between the two can effectively improve the sealing performance of the mechanism box; by setting a positive pressure sealing strip 2, when the pressure inside the mechanism box is greater than the external pressure, the positive pressure sealing strip 2 can be in close contact with the door frame sealing frame 3, thereby further improving the sealing performance of the mechanism box. According to the needs, the door body sealing frame 1 and the cabinet door of the mechanism box adopt existing well-known fixing methods, such as mechanical fixing method, adhesive fixing method and hot vulcanization molding method, among which the hot vulcanization molding method has the characteristics of firmness, durability, environmental resistance and uniformity; in addition, the door frame connecting strip and the door frame are fixed in an integrated manner, which specifically adopts the sheet metal processing method, and is formed by cutting and bending on the thin plate structure of the door frame.

[0030] The above cabinet sealing components can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached Figure 1 、 2 As shown in Figures 3, 4, and 5, an adjustment pad 6 is further included. At least one adjustment pad 6 is sequentially provided in the mounting groove 5 corresponding to the front end of the door frame connecting strip from front to back. During use, by providing different numbers of adjustment pads 6, the tightness of the door body sealing frame 1 and the door frame sealing frame 3 when they are in contact with each other can be adjusted.

[0031] Example 3: As shown in the attached Figure 1 、 2As shown in Figures 3, 4, and 5, the doorframe connecting strips located at the upper position, lower position, left position, and right position are the upper doorframe connecting strip, lower doorframe connecting strip 13, left doorframe connecting strip 14, and right doorframe connecting strip respectively; the upper doorframe connecting strip includes a front fixing strip 7, an upper connecting strip 8, and a rear fixing strip 9. The front end of the front fixing strip 7 is located in the installation groove 5, and the rear end of the rear fixing strip 9 can be fixedly installed with the doorframe. An upper connecting strip 8 inclined with the front higher than the rear is fixedly installed between the rear end of the front fixing strip 7 and the front end of the rear fixing strip 9. The lower doorframe connecting strip 13 has the same structure as the upper doorframe connecting strip and is symmetrically arranged up and down; the right doorframe connecting strip includes a left fixing strip 10, a right connecting strip 11, and a right fixing strip 12. The front end of the right fixing strip 12 is located in the installation groove 5, and the rear end of the left fixing strip 10 can be fixedly installed with the doorframe. A right connecting strip 11 inclined with the left rear higher than the right front is fixedly installed between the rear end of the right fixing strip 12 and the front end of the left fixing strip 10. The left doorframe connecting strip 14 has the same structure as the right doorframe connecting strip and is symmetrically arranged left and right. During use, the upper doorframe connecting strip, lower doorframe connecting strip 13, left doorframe connecting strip 14, and right doorframe connecting strip are processed on the doorframe by sheet metal processing; in addition, by setting the upper connecting strip 8 and the rear fixing strip 9, a groove is formed between the two and the doorframe. And on the premise that the two are integrally arranged with the doorframe, this unique groove structure forms a drainage groove, which is beneficial to the timely discharge of rainwater, thereby improving the sealing effect between the door body sealing frame 1 and the doorframe sealing frame 3 and extending the service life of the two.

[0032] Example 4: As shown in the appendix Figures 1 to 8 As shown, the sealed substation mechanism box using the above cabinet sealing component includes a cabinet body 15, a front cabinet door 16, a front inner door 17, a front doorframe 18, a left cabinet door 19, a left doorframe, a left cabinet door 19, a right doorframe, and a cabinet sealing component. The front side, left side, and right side of the cabinet body 15 are respectively provided with a front doorframe 18, a left doorframe, and a right doorframe in a rectangular shape. The front left side of the front doorframe 18 is hinged to the rear left side of the front cabinet door 16. The rear left side of the left doorframe is hinged to the rear right side of the left cabinet door 19. The rear right side of the right doorframe is hinged to the rear left side of the right cabinet door 20. A front inner door 17 is hinged inside the front doorframe 18; a cabinet sealing component is provided between the front cabinet door 16 and the front doorframe 18, a cabinet sealing component is provided between the left cabinet door 19 and the left doorframe, and a cabinet sealing component is provided between the right cabinet door 20 and the right doorframe. During use, by setting a door body sealing frame 1 on the cabinet door of the mechanism box and a doorframe sealing frame 3 on the doorframe, the problem of poor sealing of the existing substation mechanism box is effectively solved under the interaction and cooperation of the two.

[0033] According to actual needs, the above sealed substation mechanism box can be further optimized or / and improved: Example 5: As shown in the appendix Figure 6As shown, it also includes a control module, a positive pressure dustproof device and a pressure differential sensor. The positive pressure dustproof device includes a positive pressure fan, an air filter, an air inlet pipe and an air outlet pipe. The air outlet end of the air filter is fixedly connected to the air inlet end of the positive pressure fan by an air inlet pipe. The cabinet body 15 is provided with an air inlet, and the air inlet is fixedly connected to the air outlet end of the positive pressure fan by an air outlet pipe. The cabinet body 15 is provided with a pressure differential sensor, which is connected to the control module, and the control module is connected to the positive pressure fan. During use, by setting the positive pressure fan, the pressure inside the mechanism box is greater than the external pressure, so that the positive pressure sealing strip 2 is in close contact with the door frame sealing frame 3, thereby further improving the sealing performance of the mechanism box; by setting the air filter, the air sent into the mechanism box is filtered; by setting the control module and the pressure differential sensor, the pressure inside the mechanism box is controlled.

[0034] Example 6: As shown in the attached Figures 6 to 8 As shown, it also includes a booster jet device and a negative pressure suction device. The booster jet device includes a booster pump, an air filter, an air intake valve, an air intake line, a filter line 21, a jet main pipe 22 and a jet branch pipe 23. The booster pump and the air filter are arranged in the cabinet body 15. The cabinet body 15 is provided with an air inlet. The air inlet and the air inlet end of the air filter are fixedly connected with an air intake line. The air outlet end of the air filter and the air inlet end of the booster pump filter are fixedly connected with a filter line 21. The filter The air inlet end of pipeline 21 is fixedly connected to the air inlet end of the jet main pipe 22, and the air outlet end of the jet main pipe 22 is fixedly connected to several jet branch pipes 23. The negative pressure suction device includes a dust suction fan, a dust suction main pipe 24, and dust suction branch pipes 25. The dust suction fan is installed on the cabinet body 15, and the air inlet end of the dust suction fan is fixedly connected to the dust suction main pipe 24 located inside the cabinet body 15. The air inlet end of the dust suction main pipe 24 is fixedly connected to several dust suction branch pipes 25. The control module is connected to the booster pump and the dust suction fan. During use, the booster jet device is provided to spray pressurized gas onto the electrical components in the mechanism box, blowing away floating sediment or moisture. The negative pressure suction device is provided to remove floating sediment or moisture blown away by the pressurized gas. The control module controls the booster pump and dust suction fan to complete the blowing and suctioning at regular intervals.

[0035] Example 7: As shown in the attached Figure 6 、 7 As shown, the cabinet body 15 is equipped with a main jet pipe 22, a rectangular, annular pipeline. Four vertically extending branch jet pipes 23 are fixedly connected to its upper side. These branch jet pipes 23 are provided with a plurality of purge holes spaced apart from one another. The outer side of the main jet pipe 22 is fixedly connected to the air inlet end of the filter line 21. During use, this arrangement optimizes the layout of the branch jet pipes 23 and the main jet pipe 22 within the cabinet, extending the purge range.

[0036] Example 8: As shown in the attached Figure 6 、 8 As shown, the cabinet body 15 is equipped with a main dust collection pipe 24. This main dust collection pipe 24 is a rectangular, ring-shaped pipeline. Four horizontal, forward-facing dust collection branch pipes 25 are fixedly connected to the front of the main dust collection pipe 24. The dust collection branch pipes 25 are provided with a plurality of dust collection holes spaced apart at the front and rear ends. The upper side of the main dust collection pipe 24 is fixedly connected to the air inlet of the dust collection fan. During use, this arrangement makes the arrangement of the dust collection branch pipes 25 and the main dust collection pipe 24 more reasonable within the cabinet, and expands the suction range.

[0037] Example 9: As shown in the attached Figure 6 As shown, it also includes a temperature and humidity sensor, a low-temperature heater and a dehumidification heater. The cabinet body 15 is equipped with a temperature and humidity sensor, a low-temperature heater and a dehumidification heater. The temperature and humidity sensor is connected to the controller, and the controller is connected to the low-temperature heater and the dehumidification heater.

[0038] During use, by installing temperature and humidity sensors, low-temperature heaters, and dehumidification heaters in the mechanism box, and combining negative pressure suction, positive pressure sealing, and pressurized purge technology, the operating environment of the mechanism box can be significantly improved, and the reliability and safety of the equipment can be improved. Specifically: (1) The temperature and humidity sensor is the core device for environmental monitoring of the mechanism box. Its main function is to monitor the temperature and humidity data inside the mechanism box in real time, providing a basis for subsequent control. When the temperature and humidity exceed the set range, the sensor will trigger an alarm signal to remind the operation and maintenance personnel to take corresponding measures. In addition, the temperature and humidity sensor also provides data input for the automatic adjustment of equipment such as low-temperature heaters and dehumidification heaters to ensure that the equipment operates within the appropriate temperature and humidity range.

[0039] (2) The main function of the low-temperature heater is to prevent the moisture inside the mechanism box from freezing in low-temperature environments, thereby preventing equipment failure due to freezing. At the same time, it can also ensure that the equipment inside the mechanism box can still operate normally under low-temperature conditions, preventing performance degradation or damage due to low temperatures. The dehumidification heater heats and evaporates the moisture in the air, reducing the relative humidity inside the cabinet, preventing moisture from condensing into dewdrops, and avoiding the risk of electrical component corrosion and short circuits caused by high humidity.

[0040] (3) Positive pressure sealing technology delivers filtered air to the inside of the mechanism box, making the air pressure inside the cabinet slightly higher than that outside, thereby effectively isolating the entry of external dust, moisture and corrosive gases. Boost purge technology optimizes heat dissipation by increasing air flow and preventing equipment overheating. Negative pressure suction technology generates negative pressure inside the mechanism box to extract moisture and pollutants, thereby reducing the humidity inside the cabinet and removing harmful substances.

[0041] In summary, the combined use of these technologies can produce significant comprehensive benefits for the mechanism box. First, the temperature and humidity sensors, low-temperature heaters, and dehumidification heaters work together to maintain suitable temperature and humidity conditions, preventing icing and condensation, thereby protecting the electrical components within the mechanism box. Second, negative pressure suction removes internal moisture and contaminants, while positive pressure sealing effectively isolates external dust, moisture, and corrosive gases, collectively enhancing the mechanism box's pollution protection capabilities. Furthermore, pressurized purge optimizes heat dissipation, prevents equipment overheating, and further improves operational reliability. Therefore, the synergistic effect of these technologies not only improves the reliability and safety of equipment operation, but also significantly optimizes the adaptability and maintenance efficiency of the mechanism box. This combined technology can significantly improve the adaptability and reliability of the mechanism box, especially in extreme environments such as low temperature, high humidity, or dusty environments. Through real-time monitoring and automatic adjustment, it achieves intelligent management of the mechanism box environment and reduces the frequency and cost of manual inspections.

[0042] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A cabinet sealing assembly, characterized in that It includes a door body sealing frame, a positive pressure sealing strip, a door frame sealing frame and a door frame connecting strip. The door body sealing frame and the door frame sealing frame are both rectangular frame structures. An arc groove is provided on the rear side of the door body sealing frame. The front side of the door frame sealing frame matches the arc groove and is located in the arc groove; the upper lower side, the lower upper side, the left right side and the right left side of the rear side of the door body sealing frame are all provided with positive pressure sealing strips that can contact the door frame sealing frame; the rear side of the door frame sealing frame is provided with an installation groove opening backwards, the installation groove is in a rectangular frame shape, and a door frame connecting strip that can be fixedly installed with the door frame is provided in the installation groove.

2. The cabinet sealing assembly according to claim 1, characterized in that It also includes an adjustment pad, and at least one adjustment pad is arranged in sequence from front to back in the installation groove corresponding to the front end position of the door frame connecting strip.

3. The cabinet sealing assembly according to claim 1 or 2, characterized in that The door frame connecting strip located at the upper position, the door frame connecting strip located at the lower position, the door frame connecting strip located at the left position and the door frame connecting strip located at the right position are respectively an upper door frame connecting strip, a lower door frame connecting strip, a left door frame connecting strip and a right door frame connecting strip; the upper door frame connecting strip comprises a front fixing strip, an upper connecting strip and a rear fixing strip, the front end of the front fixing strip is located in the mounting groove, and the rear end of the rear fixing strip can be fixedly installed with the door frame, an upper connecting strip inclined in a front-high-back-low shape is fixedly installed between the rear end of the front fixing strip and the front end of the rear fixing strip, the lower door frame connecting strip has the same structure as the upper door frame connecting strip and is symmetrically arranged up and down; the right door frame connecting strip comprises a left fixing strip, a right connecting strip and a right fixing strip, the front end of the right fixing strip is located in the mounting groove, the rear end of the left fixing strip can be fixedly installed with the door frame, a right connecting strip inclined in a left-rear-right-front shape is fixedly installed between the rear end of the right fixing strip and the front end of the left fixing strip, the left door frame connecting strip has the same structure as the right door frame connecting strip and is symmetrically arranged left and right.

4. A sealed substation mechanism box using the cabinet sealing assembly according to any one of claims 1 to 3, characterized in that It includes a cabinet body, a front cabinet door, a front inner door, a front door frame, a left cabinet door, a left door frame, a left cabinet door, a right door frame and a cabinet sealing assembly. The front, left and right sides of the cabinet body are respectively provided with a front door frame, a left door frame and a right door frame in a horseshoe shape. The front side of the left part of the front door frame is hinged to the rear side of the left part of the front cabinet door, the left side of the rear of the left door frame is hinged to the right side of the rear of the left cabinet door, the right side of the rear of the right door frame is hinged to the left side of the rear of the right cabinet door, and the front inner door is hinged in the front door frame; a cabinet sealing assembly is provided between the front cabinet door and the front door frame, a cabinet sealing assembly is provided between the left cabinet door and the left door frame, and a cabinet sealing assembly is provided between the right cabinet door and the right door frame.

5. The sealed substation mechanism box according to claim 4, characterized in that It also includes a control module, a positive pressure dust-proof device and a pressure differential sensor. The positive pressure dust-proof device includes a positive pressure fan, an air filter, an air inlet duct and an air outlet duct. The air outlet end of the air filter is fixedly connected to the air inlet end of the positive pressure fan with an air inlet duct. The cabinet body is provided with an air inlet, and the air inlet is fixedly connected to the air outlet end of the positive pressure fan with an air outlet duct. The cabinet body is provided with a pressure differential sensor, the pressure differential sensor is connected to the control module, and the control module is connected to the positive pressure fan.

6. The sealed substation mechanism box according to claim 5, characterized in that The air filter is then passed through the intake manifold, and the intake end of the air filter is fixedly connected to the intake end of the air filter. The filter line is fixedly connected between the outlet end of the air filter and the intake end of the booster pump filter. The air inlet end of the filter line is fixedly connected to the air inlet end of the air filter, and the air outlet end of the air filter is fixedly connected to the intake end of the air filter. The air inlet end of the filter line is fixedly connected to the air inlet end of the air manifold, and the air outlet end of the air manifold is fixedly connected to several air branches. The negative pressure suction device comprises a dust suction fan, a dust suction manifold and a dust suction branch. The cabinet body is provided with a dust suction fan, the air inlet end of the dust suction fan is fixedly connected to the dust suction manifold located in the cabinet body, and the air inlet end of the dust suction manifold is fixedly connected to several dust suction branches. The control module is connected to the booster pump and the dust suction fan.

7. The sealed substation mechanism box according to claim 6, characterized in that The cabinet body is equipped with a jet main pipe, which is a rectangular ring pipe. Four vertical jet branches are fixedly connected to the upper side of the jet main pipe. Several purge holes are arranged at intervals above and below the jet branches. The outer side of the jet main pipe is fixedly connected to the air inlet end of the filter pipeline.

8. The sealed substation mechanism box according to claim 6 or 7, characterized in that A dust collection main pipe is installed in the cabinet body. The dust collection main pipe is a rectangular ring pipe. Four horizontal forward dust collection branch pipes are fixedly connected to the front side of the dust collection main pipe. Several dust collection holes are arranged at intervals in the front and back of the dust collection branch pipes. The upper side of the dust collection main pipe is fixedly connected to the air inlet end of the dust collection fan.

9. The compressed air dustproof electrical control cabinet according to claim 5, 6 or 7, characterized in that It also includes a temperature and humidity sensor, a low-temperature heater and a dehumidification heater. The temperature and humidity sensor, the low-temperature heater and the dehumidification heater are arranged in the cabinet body. The temperature and humidity sensor is connected to the controller, and the controller is connected to the low-temperature heater and the dehumidification heater.

10. The sealed substation mechanism box according to claim 8, characterized in that It also includes a temperature and humidity sensor, a low-temperature heater and a dehumidification heater. The temperature and humidity sensor, the low-temperature heater and the dehumidification heater are arranged in the cabinet body. The temperature and humidity sensor is connected to the controller, and the controller is connected to the low-temperature heater and the dehumidification heater.

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