Anti-condensation high-voltage switch cabinet sealing structure

Abstract

The utility model discloses an anti-condensation high-voltage switch cabinet sealing structure, which belongs to the technical field of high-voltage switch cabinets, and is characterized in that the anti-condensation high-voltage switch cabinet sealing structure comprises a cabinet body, the front side of the cabinet body is rotatably connected with a cabinet door, and a sealing assembly is arranged between the cabinet door and the cabinet body. The trapezoid sealing strip, the reinforcing sealing ring and the square sealing strip cooperate with one another to form a multiple sealing structure, the trapezoid sealing strip is embedded in a groove of the cabinet body and tightly attached to the cabinet door, and the reinforcing sealing ring is clamped into a reinforcing groove of the trapezoid sealing strip, so that the sealing effect is further enhanced, moisture is effectively prevented from invading from the joint of the cabinet body and the cabinet door, and the service life of the cabinet door is prolonged. The square sealing strip located on the inner side provides secondary sealing guarantee, the sealing performance of the contact position of the cabinet body and the cabinet door is greatly improved, the possibility that external moisture enters the cabinet body is reduced from the source, and then the condensation generation probability is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear technology, and in particular to a high-voltage switchgear sealing structure that prevents condensation. Background Technology

[0002] High-voltage switchgear, as an important device in the power system for controlling, protecting and monitoring high-voltage electrical equipment, is widely used in substations, power plants and other places. In actual operation, the condensation problem inside the switchgear seriously affects its safe and stable operation. Condensation refers to the phenomenon that when the temperature of the air inside the switchgear drops below the dew point temperature, water vapor condenses into water droplets and adheres to the surface of the equipment.

[0003] One of the normal operating conditions for high-voltage switchgear is that the daily average relative humidity should not exceed 95% RH. Condensation refers to the condensation of water vapor in the air into water droplets when the ambient temperature is lower than the dew point temperature of the relative humidity. Under the same environmental conditions, the higher the relative humidity and the closer the dew point temperature is to the ambient air temperature, the easier it is for condensation to occur. Operational experience has shown that humid air and condensation are important causes of insulation failures in high-voltage switchgear.

[0004] An existing patent (publication number: CN222706039U) discloses a high-voltage switchgear with dehumidification and anti-condensation functions. This utility model uses a hot air blower to draw in air from the outside, heat it, and then transmit it through the air outlet into the connecting pipe, and then into the air supply pipe. The air is then further transmitted to the high and low voltage switchgear, and hot air is blown onto the four walls of the switchgear to raise the temperature of the walls and prevent condensation. This design can raise the temperature of the inner wall of the device and effectively prevent condensation.

[0005] To address the aforementioned issues, existing patents offer solutions, but current technologies still have several shortcomings in resolving condensation problems in high-voltage switchgear. Firstly, the sealing performance at the junction of the cabinet door and the cabinet body is poor, making it difficult to effectively prevent the intrusion of external moisture. Even with heating or ventilation measures, moisture can still penetrate due to the weak sealing, preventing a fundamental solution to the condensation problem. Secondly, while heating dehumidification methods can alleviate condensation to some extent, most heating methods used in cabinets suffer from poor uniformity. This uneven heating can cause some areas of the equipment to overheat, and prolonged exposure to this condition can severely impact the equipment's lifespan, increase the risk of equipment failure, and raise maintenance costs and safety hazards. Utility Model Content

[0006] The purpose of this utility model is to provide a high-voltage switchgear sealing structure that prevents condensation, which can solve many shortcomings of existing technologies in solving the condensation problem of high-voltage switchgear. First, the sealing performance at the junction of the cabinet door and the cabinet body is poor, making it difficult to effectively prevent the intrusion of external moisture. Even with heating or ventilation measures, moisture can still enter due to the shortcomings of the sealing link, so the condensation problem cannot be fundamentally solved. Second, although heating dehumidification can alleviate condensation to a certain extent, most heating methods used in cabinets have the problem of poor uniformity. This uneven heating will cause the temperature of some areas of the equipment to be too high. Long-term exposure to this state will seriously affect the service life of the equipment, increase the risk of equipment failure, and increase maintenance costs and safety hazards.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage switchgear sealing structure for preventing condensation, comprising a cabinet body, a cabinet door rotatably connected to the front side of the cabinet body, a sealing component between the cabinet door and the cabinet body, anti-condensation and dehumidification components at the top and bottom of the cabinet body, and a temperature and humidity sensor inside the cabinet body.

[0008] The sealing assembly includes a groove formed on the front side of the cabinet body, a trapezoidal sealing strip embedded inside the groove, the front side of the trapezoidal sealing strip contacting the rear side of the cabinet door, a reinforcing groove formed on the front side of the trapezoidal sealing strip, a reinforcing sealing ring adhered to the rear side of the cabinet door, the reinforcing sealing ring being snapped into the reinforcing groove, and a square sealing strip adhered to the rear side of the cabinet door, the square sealing strip being located inside the trapezoidal sealing strip, the rear side of the square sealing strip contacting the front side of the cabinet body.

[0009] Preferably, the anti-condensation and dehumidification component includes a grid plate fixedly connected to the bottom side of the cabinet interior, a blower fixedly connected to the bottom side of the cabinet interior, the blower being located at the bottom of the grid plate, and an electric heating wire being provided between the blower and the grid plate.

[0010] Preferably, the bottom of the blower is connected to an air supply pipe, the right side of the air supply pipe is connected to a conveying check valve, an electric fan is embedded in the right side of the cabinet, and the output end of the electric fan is connected to the right side of the conveying check valve.

[0011] Preferably, a controller is provided on the right side of the cabinet, and the controller is electrically connected to an electric fan, an electric heating wire and a temperature and humidity sensor respectively. Output check valves are connected to the top of the front and rear sides of the cabinet, and a moisture-absorbing structure is provided on the bottom side of the cabinet interior.

[0012] Preferably, the moisture-absorbing structure includes a frame slidably connected to the top side inside the cabinet, the frame being located inside the output check valve.

[0013] Preferably, a mesh is welded inside the frame, and the top of the mesh is filled with a desiccant block.

[0014] Preferably, a protective net is provided on the right side of the electric fan, and the protective net is hexagonal mesh.

[0015] Preferably, a buckle is fixedly connected to the right side of the frame, and the buckle is ring-shaped.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application, by setting up a sealing component, when the cabinet and cabinet door are closed together, the trapezoidal sealing strip, the reinforcing sealing ring, and the square sealing strip work together to build a multi-layer sealing structure. The trapezoidal sealing strip is embedded in the groove of the cabinet and fits tightly with the cabinet door, while the reinforcing sealing ring is inserted into the reinforcing groove of the trapezoidal sealing strip, further enhancing the sealing effect and effectively preventing moisture from entering from the connection between the cabinet and the cabinet door. The square sealing strip located on the inner side provides secondary sealing protection, which greatly improves the sealing performance at the contact point between the cabinet and the cabinet door, reduces the possibility of external moisture entering from the source, and thus reduces the probability of condensation.

[0018] 2. The anti-condensation and dehumidification component set in this application works in conjunction with the temperature and humidity sensor. The anti-condensation and dehumidification component installed on the top side inside the cabinet can directly absorb the moisture inside the cabinet. The temperature and humidity sensor monitors the temperature and humidity inside the cabinet in real time. Once the temperature and humidity exceed the set threshold, it will send feedback information to the anti-condensation and dehumidification component at the bottom of the cabinet, so that it can be activated in time. The anti-condensation and dehumidification component at the bottom can quickly adjust the environment inside the cabinet through a ventilation method that combines blowing and heating. Compared with the traditional single heating and dehumidification method, it can more accurately control the temperature and humidity, avoid local overheating of the equipment, extend the service life of the equipment, reduce the risk of equipment failure, reduce maintenance costs, and effectively ensure the safe and stable operation of the high-voltage switchgear. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the anti-condensation sealing structure of the high-voltage switchgear of this utility model;

[0020] Figure 2 This is a structural diagram of the cabinet body of this utility model;

[0021] Figure 3 This is a structural diagram of the sealing assembly of this utility model;

[0022] Figure 4 This is a structural diagram of the anti-condensation and dehumidification component of this utility model;

[0023] Figure 5 This is a structural diagram of the moisture-absorbing structure of this utility model.

[0024] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Sealing assembly; 31. Groove; 32. Trapezoidal sealing strip; 33. Reinforcing groove; 34. Reinforcing sealing ring; 35. Square sealing strip; 4. Anti-condensation and dehumidification assembly; 41. Grille; 42. Air blower; 43. Electric heating wire; 44. Air supply duct; 45. Conveyor check valve; 46. Electric fan; 47. Controller; 48. Output check valve; 49. Moisture absorption structure; 491. Frame; 492. Partition net; 493. Desiccant block; 5. Temperature and humidity sensor; 6. Protective net; 7. Pull buckle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A high-voltage switchgear sealing structure for preventing condensation includes a cabinet body 1, a cabinet door 2 rotatably connected to the front side of the cabinet body 1, a sealing component 3 between the cabinet door 2 and the cabinet body 1, anti-condensation and dehumidification components 4 at the top and bottom of the cabinet body 1, and a temperature and humidity sensor 5 inside the cabinet body 1.

[0028] The sealing component 3 includes a groove 31 formed on the front side of the cabinet body 1. A trapezoidal sealing strip 32 is embedded inside the groove 31. The front side of the trapezoidal sealing strip 32 contacts the rear side of the cabinet door 2. A reinforcing groove 33 is formed on the front side of the trapezoidal sealing strip 32. A reinforcing sealing ring 34 is adhered to the rear side of the cabinet door 2. The reinforcing sealing ring 34 is snapped into the interior of the reinforcing groove 33. A square sealing strip 35 is adhered to the rear side of the cabinet door 2. The square sealing strip 35 is located inside the trapezoidal sealing strip 32. The rear side of the square sealing strip 35 contacts the front side of the cabinet body 1.

[0029] In this embodiment: by setting a sealing component 3, an anti-condensation and dehumidification component 4, and a temperature and humidity sensor 5, when the cabinet 1 and cabinet door 2 are closed, the sealing component 3 between the cabinet 1 and cabinet door 2 begins to function. The trapezoidal sealing strip 32 embedded in the groove 31 of the cabinet 1 fits tightly against the cabinet door 2, initially blocking moisture. The reinforcing sealing ring 34 is inserted into the reinforcing groove 33 of the trapezoidal sealing strip 32, and the two fit tightly together to fill the gaps, further improving the sealing effect. The square sealing strip 35 on the inner side serves as a secondary sealing guarantee, again blocking moisture that may bypass the first two lines of defense, fundamentally reducing the pathways for external moisture to enter the cabinet 1 and reducing the conditions for condensation formation. The temperature and humidity sensor 5 monitors the internal temperature and humidity of the cabinet 1 in real time. Once the temperature and humidity exceed the set reasonable threshold, The system will quickly send a feedback signal to the anti-condensation and dehumidification component 4 at the bottom of cabinet 1. The anti-condensation and dehumidification component 4, installed at the top of cabinet 1, has a drying function and can directly absorb moisture inside the cabinet, initially reducing humidity. The bottom anti-condensation and dehumidification component 4, which is activated upon receiving the signal, will work through a ventilation method that combines blowing and heating. Heating can increase the air temperature inside cabinet 1, reduce relative humidity, and reduce the possibility of condensation. Blowing promotes air circulation, allowing heat to be evenly distributed, avoiding local overheating inside cabinet 1, and accelerating the removal of moisture. This precise temperature and humidity control method, compared with traditional single heating dehumidification, can better maintain a stable temperature and humidity environment inside the cabinet, ensure the safe and stable operation of electrical equipment inside the cabinet, extend the service life of the equipment, and reduce the risk of failure and maintenance costs.

[0030] Specifically, such as Figure 4 As shown, the anti-condensation and dehumidification component 4 includes a grid plate 41 fixedly connected to the bottom inside of the cabinet 1, a blower 42 fixedly connected to the bottom inside of the cabinet 1, the blower 42 being located at the bottom of the grid plate 41, and an electric heating wire 43 being provided between the blower 42 and the grid plate 41.

[0031] Specifically, such as Figure 4 As shown, the bottom of the blower 42 is connected to an air supply pipe 44, and the right side of the air supply pipe 44 is connected to a conveying check valve 45. An electric fan 46 is embedded in the right side of the cabinet 1, and the output end of the electric fan 46 is connected to the right side of the conveying check valve 45.

[0032] Specifically, such as Figure 4 As shown, a controller 47 is provided on the right side of the cabinet 1. The controller 47 is electrically connected to the electric fan 46, the electric heating wire 43 and the temperature and humidity sensor 5 respectively. Output check valves 48 are connected to the top of the front and rear sides of the cabinet 1. A moisture absorption structure 49 is provided on the bottom side inside the cabinet 1.

[0033] In this embodiment: By setting an anti-condensation and dehumidification component 4 and installing a moisture-absorbing structure 49 on the top side inside the cabinet 1, when the humidity inside the cabinet 1 is within the normal range, it continuously absorbs moisture inside the cabinet. Once the temperature and humidity sensor 5 detects that the temperature and humidity inside the cabinet exceed a preset reasonable threshold, it immediately sends a feedback signal to the controller 47. After receiving the signal, the controller 47 activates its internal relay, energizing the electric heating wire 43 below the bottom grille 41 of the cabinet 1 to heat the air inside the blower 42. As the air temperature rises, its ability to hold water vapor increases, the relative humidity decreases, and the possibility of condensation is reduced. At the same time, the controller... 47. Start the electric fan 46 and send air to the blower 42 through the air supply pipe 44. The backflow preventer 45 prevents air backflow and ensures unidirectional airflow. The air blown into the blower 42 mixes with the hot air to form hot air. After being evenly mixed between the blower 42 and the grille plate 41, it is blown into the cabinet 1. The hot air flows inside the cabinet 1, accelerating air circulation and distributing heat evenly. This prevents local overheating inside the cabinet 1 and extends the service life of the equipment. It quickly carries away moisture and discharges it through the output backflow preventer 48 on the front and rear top of the cabinet 1. The output backflow preventer 48 prevents external moisture from entering. In this way, the temperature and humidity inside the cabinet are effectively regulated to ensure the stable operation of the electrical equipment.

[0034] Specifically, such as Figure 5 As shown, the moisture absorption structure 49 includes a frame 491 that is slidably connected to the top side inside the cabinet 1, and the frame 491 is located inside the output check valve 48.

[0035] Specifically, such as Figure 5 As shown, a mesh 492 is welded inside the frame 491, and a desiccant block 493 is filled on top of the mesh 492.

[0036] In this embodiment: by setting the moisture-absorbing structure 49, when the cabinet 1 is operating normally and the humidity inside the cabinet does not exceed the set range, the desiccant block 493 continuously absorbs moisture. After the electric fan 46 and the electric heating wire 43 are started, they work together to generate hot air. As the hot air rises, the humid air inside the cabinet 1 rises to the top. At this time, the desiccant block 493 can absorb moisture more efficiently, further reducing the humidity inside the cabinet and complementarily maintaining a dry environment inside the cabinet. In addition, the frame 491 is designed to be sliding. When the desiccant block 493 becomes saturated with moisture and loses its effect, the operator can pull the latch 7 to easily slide the frame 491 out of the cabinet 1, which is convenient for replacing or drying the desiccant block 493. After processing, the frame 491 can be slid back to its original position to ensure that the moisture-absorbing function continues to work.

[0037] Specifically, such as Figure 2 As shown, a protective net 6 is provided on the right side of the electric fan 46. The protective net 6 is in the shape of a hexagonal mesh.

[0038] Specifically, such as Figure 5As shown, a buckle 7 is fixedly connected to the right side of the frame 491. The buckle 7 is ring-shaped.

[0039] In this embodiment: by setting the protective net 6 and the pull buckle 7, the hexagonal mesh protective net 6 on the right side of the electric fan 46 can effectively block foreign objects from entering the fan, avoid damage or malfunction caused by foreign objects being rolled in, ensure the stable operation of the electric fan 46, and guarantee normal operation. The annular pull buckle 7 on the right side of the frame 491 provides a point of leverage for the sliding operation of the frame 491. The operator can easily pull the frame 491 through the pull buckle 7 to achieve convenient sliding of the frame 491, which facilitates the replacement or maintenance of the desiccant block 493 and improves the efficiency of equipment maintenance.

[0040] Working Principle: During the use of the anti-condensation high-voltage switchgear, firstly, when the cabinet door 2 is closed, the trapezoidal sealing strip 32 embedded in the groove 31 of the cabinet body 1 fits tightly against the cabinet door 2, initially isolating moisture. The reinforcing sealing ring 34 is inserted into the reinforcing groove 33 of the trapezoidal sealing strip 32, filling the tiny gaps and strengthening the sealing effect. The square sealing strip 35 located on the inner side forms secondary protection, further blocking moisture penetration, reducing the entry of external moisture into the cabinet body 1 from the source, and reducing the risk of condensation. When the cabinet body 1 is running, the temperature and humidity sensor 5 monitors the internal temperature and humidity in real time. When the humidity is within the normal range, the desiccant block 493 on the top of the cabinet body 1 continuously absorbs the moisture inside the cabinet. Once the temperature and humidity exceed the preset threshold, the temperature and humidity sensor 5 quickly sends a signal to the controller 47. After receiving the signal, the controller 47 activates the internal relay, which on the one hand energizes the electric heating wire 43 under the bottom grille 41 of the cabinet body 1 to heat up, increasing the air temperature inside the blower 42 and reducing the relative humidity. On the other hand, it starts the electric fan 46, which delivers air through the blower. Air duct 44 supplies air to blower 42, and backflow preventer 45 ensures unidirectional airflow and prevents backflow. The blown air mixes with hot air to form hot air, which is then evenly mixed with the grille 41 by blower 42 and blown into the cabinet 1. The hot air circulates inside the cabinet 1, which not only accelerates air circulation and evenly distributes heat to prevent local overheating of the equipment, but also quickly carries away moisture, which is discharged through the output backflow preventer 48 at the top of the front and rear sides of the cabinet 1. The output backflow preventer 48 also prevents external moisture from entering. At the same time, as the hot air rises, the humid air inside the cabinet gathers at the top, and the desiccant block 493 at the top enters a high-efficiency dehumidification state, further reducing humidity and working together to maintain a dry environment inside the cabinet. In addition, the ring buckle 7 on the right side of the frame 491 allows the operator to easily slide the desiccant block 493 out of the frame 491 after it has absorbed moisture and perform replacement or drying. After processing, the desiccant block slides back into the frame 491 to ensure the effective operation of the moisture absorption function and ensure the stable operation of electrical equipment inside the high-voltage switch cabinet.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A condensation-proof high-voltage switch cabinet sealing structure comprising a cabinet body (1), characterized in that: The front side of the cabinet body (1) is rotationally connected with a cabinet door (2), a sealing assembly (3) is arranged between the cabinet door (2) and the cabinet body (1), the top and the bottom of the cabinet body (1) are provided with a condensation prevention and dehumidification assembly (4), and the inside of the cabinet body (1) is provided with a temperature and humidity sensor (5); The sealing assembly (3) comprises a groove (31) formed in the front side of the cabinet body (1), a trapezoidal sealing strip (32) is embedded in the inside of the groove (31), the front side of the trapezoidal sealing strip (32) is in contact with the rear side of the cabinet door (2), a reinforcing groove (33) is formed in the front side of the trapezoidal sealing strip (32), a reinforcing sealing ring (34) is bonded to the rear side of the cabinet door (2), the reinforcing sealing ring (34) is clamped in the inside of the reinforcing groove (33), a square sealing strip (35) is bonded to the rear side of the cabinet door (2), the square sealing strip (35) is located on the inner side of the trapezoidal sealing strip (32), and the rear side of the square sealing strip (35) is in contact with the front side of the cabinet body (1).

2. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 1, characterized in that: The condensation prevention and dehumidification assembly (4) comprises a grating plate (41) fixedly connected to the inside bottom side of the cabinet body (1), a blowout (42) is fixedly connected to the inside bottom side of the cabinet body (1), the blowout (42) is located at the bottom of the grating plate (41), and an electric heating wire (43) is arranged between the blowout (42) and the grating plate (41).

3. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 2, characterized in that: The bottom of the blowout (42) is communicated with a supply air pipe (44), the right side of the supply air pipe (44) is communicated with a delivery check valve (45), the right side of the cabinet body (1) is embedded with an electric fan (46), and the output end of the electric fan (46) is communicated with the right side of the delivery check valve (45).

4. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 3, characterized in that: The right side of the cabinet body (1) is provided with a controller (47), the controller (47) is electrically connected with the electric fan (46), the electric heating wire (43) and the temperature and humidity sensor (5) respectively, the top of the front side and the rear side of the cabinet body (1) are both communicated with an output check valve (48), and the bottom side of the inside of the cabinet body (1) is provided with a moisture absorption structure (49).

5. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 4, characterized in that: The moisture absorption structure (49) comprises a frame (491) slidingly connected to the inside top side of the cabinet body (1), and the frame (491) is located on the inner side of the output check valve (48).

6. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 5, characterized in that: A partition net (492) is welded in the inside of the frame (491), and the top of the partition net (492) is filled with a desiccant block (493).

7. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 3, characterized in that: The right side of the electric fan (46) is provided with a protective net (6), and the protective net (6) is in the shape of a hexagonal grid.

8. The condensation-preventing high-voltage switch cabinet sealing structure according to claim 6, characterized in that: The right side of the frame (491) is fixedly connected with a pull buckle (7), and the pull buckle (7) is in the shape of a ring.

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