A high-voltage switch cabinet based on a modular structure

Abstract

The application discloses a high-voltage switch cabinet based on a modular structure, which has a cabinet body and an external pipe extending from the cabinet body, an instrument room, a handcart room, a busbar room and a cable room are arranged in the cabinet body, an instrument for measurement is arranged in the instrument room, a handcart is arranged in the handcart room, a contact box is arranged in the interior of the cabinet body, the upper contact box is connected with a busbar connecting piece through a busbar, the lower contact box is connected with a current-voltage transformer, a non-flat partition plate is arranged between the busbar room and the cable room, a handcart room cover plate, a busbar room cover plate and a cable room cover plate are arranged above the handcart room, the busbar room and the cable room respectively, a cover plate joint piece which is not integrated with the cover plate is arranged on the handcart room cover plate, the busbar room cover plate and the cable room cover plate, and the safety of the high-voltage switch cabinet is improved.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage switchgear, and specifically relates to a high-voltage switchgear based on a modular structure. Background Technology

[0002] High-voltage switchgear refers to equipment used in power systems for switching, controlling, or protecting power during power generation, transmission, distribution, conversion, and consumption. The high-voltage switchgear manufacturing industry is an important component of the power transmission and transformation equipment manufacturing industry and occupies a very important position in the entire power industry.

[0003] Existing technology 1 discloses a high-voltage switchgear, application number: CN201420602074.8, publication number: CN204179522U, including a cabinet, buffer springs, support feet, circuit compartment, and observation window. The circuit compartment is installed inside the cabinet by three buffer springs set at the bottom. The buffer springs can effectively buffer the high-voltage switchgear when it encounters external vibrations, so as to avoid damage to the components inside the cabinet. An observation window is also provided on the side wall of the cabinet. The observation window is equipped with a protective net. The outer edge of the observation window is provided with a frame. The upper edge of the frame is hinged to the top of the observation window. The lower edge of the frame is embedded with a magnetic strip. A protective cover is embedded in the frame. The protective cover is made of transparent material. By simply lifting the frame, the cable head and equipment connection can be exposed, and the cable head and equipment connection can be inspected and measured at any time. This is very convenient. It not only does not compromise the integrity of the switchgear, the safety of the locking device, or the aesthetics, but also solves the problem of inspection and temperature measurement of the switchgear.

[0004] Prior art 1 discloses a high-voltage switchgear, application number: CN201520072260.X, publication number: CN204517248U, including a cabinet and a handcart. The cabinet includes a high-voltage compartment, a handcart compartment, and a low-voltage compartment connected sequentially from bottom to top. The handcart compartment is movably connected to the handcart. A first multi-folded edge structure is provided at the bottom edge of the high-voltage compartment. A second multi-folded edge structure is provided at the bottom edge of the handcart compartment, and a third multi-folded edge structure is provided at the bottom edge of the low-voltage compartment. A support structure is fixedly connected to each of the first, second, and third multi-folded edge structures. The support structure includes: a first support structure located at the bottom edge of the high-voltage compartment, a second support structure located at the bottom edge of the handcart compartment, and a third support structure located at the bottom edge of the low-voltage compartment. A relay compartment is provided in the low-voltage compartment, and relay protection components, instruments, and a live indicator are installed in the relay compartment. The first, second, and third multi-folded edge structures are integrally cast with the outer shell of the cabinet. A first stationary contact connected to the handcart is provided in the high-voltage chamber; a second stationary contact connected to the handcart is provided in the low-voltage chamber. The first stationary contact is connected to the high-voltage cable; the second stationary contact is connected to the low-voltage busbar bushing. A guide rail interlocking device is provided on the handcart, and the guide rail interlocking device is electrically connected to the handcart's position indicator light.

[0005] Comprehensive analysis shows that existing technologies offer few improvements to the connection structure of high-voltage switchgear, such as the contact box, a crucial component. Furthermore, conventional partitions are generally used, which do not enhance strength. When encountering high-voltage impacts, these partitions often damage other compartments, expanding the scope of damage.

[0006] High temperature is a major cause of failure in high-voltage switchgear. Although the existing technology measures the temperature of each compartment, the temperature sensor is not set in an accurate manner, which makes it impossible to obtain the temperature of the compartment accurately and in a timely manner, and the obtained temperature cannot be used for accurate operational judgment. Summary of the Invention

[0007] In view of the above-mentioned technical problems, the present invention provides a high-voltage switchgear based on a modular structure, which can solve the problems in the prior art and improve the safety of the high-voltage switchgear in terms of structure and monitoring.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0009] A high-voltage switchgear based on a modular structure has a cabinet 1 and an external pipe 2 extending out of the cabinet 1. An instrument compartment 3, a truck compartment 4, a busbar compartment 5, and a cable compartment 6 are arranged inside the cabinet 1. Measuring instruments are arranged in the instrument compartment 3. A truck 7 is arranged in the truck compartment 4. A contact box 8 is arranged inside the cabinet 1. The upper contact box 8 is connected to a busbar connector 10 via a busbar 9, and the lower contact box 8 is connected to a current and voltage transformer. A non-flat partition 11 is arranged between the busbar compartment 5 and the cable compartment 6. A truck compartment cover 12, a busbar compartment cover 13, and a cable compartment cover 14 are respectively arranged above the truck compartment 4, the busbar compartment 5, and the cable compartment 6. A non-integral cover plate assembly is provided on each of the truck compartment cover 12, the busbar compartment cover 13, and the cable compartment cover 14.

[0010] As a preferred option, the vertical portion of the non-flat partition 11 is configured as a vertically oriented partition 15, and the horizontal portion of the non-flat partition 11 is configured as a horizontal partition 16. The vertically oriented partition 15 is part of a spherical shell, and the horizontal partition 16 is part of a circular tube. The vertically oriented partition 15 and the horizontal partition 16 are integrally formed.

[0011] As a preferred embodiment, the vertically oriented partition 15 is symmetrical about the horizontal reference plane X in the middle, and a vertical reference plane Y is provided. The vertical reference plane Y is tangent to the outer side of the vertically oriented partition 15 and is parallel to the left side panel of the cabinet 1. Multiple hemispherical protrusions 29 are provided on the lower side of the vertically oriented partition 15 and the lower side of the horizontal partition 16. The protrusions 29 do not exceed the horizontal reference plane X and the vertical reference plane Y. The protrusions 29 are shells integrally formed with the vertically oriented partition 15 and the horizontal partition 16.

[0012] As a preferred option, a spherical contact box 17 is installed between the handcart 7 and the busbar 9 and the current and voltage transformers.

[0013] As a preferred embodiment, the spherical contact box 17 has a housing 19, which is a shell-shaped part formed by symmetrically removing both ends of an integral spherical shell. A connecting end 20 is provided at the front end of the housing 19, and a heat sink 22 is provided on the planar rear end 21 of the housing 19. The heat sink 22 is composed of heat sink columns distributed in an array, and the heat sink columns are of different lengths. The free ends of the heat sink columns are formed at the rear end to coincide with the extension surface of the outer side of the housing.

[0014] As a preferred embodiment, an annular pleated skirt structure 25 is provided on the front side of the housing 19, a through hole 23 is provided at the rear of the housing 19, a stationary contact 26 is provided inside the housing 19, and the stationary contact 26 is connected to the busbar 9 through the through hole 23 via a connecting line 24 connected to it; an annular inner liner 27 of the same material as the housing 19 and removable is provided on the inner side of the housing 19, and an annular shield 28 is provided between the inner liner 27 and the housing 19.

[0015] As a preferred option, the cover assembly is a pressure relief component 18, which has a hemispherical shell structure and multiple air holes evenly distributed on it. The edge of the pressure relief component 18 has an extension, which is connected to the handcart compartment cover 12, the busbar compartment cover 13, and the cable compartment cover 14 by screws. The pressure relief component 18 is detachably arranged downwards, and a cooling fan 30 is provided inside the pressure relief component 18. The cooling fan 30 is fixedly connected to the extension of the pressure relief component and does not protrude from the upper surface of the cabinet 1.

[0016] As a preferred option, temperature sensors a, b, and c are respectively installed in the handcart compartment 4, the busbar compartment 5, and the cable compartment 6. Temperature sensors a, b, and c are located at a first temperature measuring point A, a second temperature measuring point B, and a third temperature measuring point C, respectively. The temperature sensors a, b, and c transmit the measured values ​​to the instrument compartment 3 for real-time display. The selection rules for the temperature measuring points are as follows:

[0017] (1) Set the total height of the cabinet 1 to h;

[0018] (2) The temperature measuring point should be pre-set on the outer side of the pressure relief component 18;

[0019] (3) Determine the locations of the high-temperature sources in the handcart compartment 4, the busbar compartment 5, and the cable compartment 6, respectively;

[0020] (4) Identify the center of all high-temperature source areas in each indoor space;

[0021] (5) Determine whether the vertical distance from the center of the high-temperature source area to the preset temperature measurement point is greater than 1 / 4h or 1 / 5h;

[0022] (7) If the value is greater than 0, it means that the selected preset temperature measurement point cannot obtain the required measurement value in a timely and accurate manner. Change the temperature measurement point and set it in the center of the high temperature source area. If the value is less than 0, it means that the selected preset temperature measurement point meets the requirements for timely and accurate acquisition of measurement values ​​and does not need to be moved.

[0023] As a preferred option, the high-voltage switchgear is also equipped with a modular temperature monitoring and early warning device. The temperature monitoring and early warning device includes an ambient temperature sensor installed outside the cabinet (1). The ambient temperature sensor, temperature sensor a, temperature sensor b, and temperature sensor c are used to measure... , , and According to the normal operating temperature of the high-voltage switchgear , , Calculate temperature difference , , ; Calculate the temperature difference during actual operation of the high-voltage switchgear , , Compare separately , , If the temperature exceeds the set threshold, it is considered too high.

[0024] As a preferred solution, excessively high temperatures in high-voltage switchgear could lead to serious accidents. However, simply comparing the difference with a set threshold is insufficient to provide operators with accurate operational alerts. Therefore, a reliability factor is introduced. Its expression is

[0025]

[0026] Similarly, calculate ;

[0027] in, For the handcart room Temperature difference measured in the second measurement;

[0028] In calculation hour,

[0029] For busbar compartment Temperature difference measured in the second measurement;

[0030] For cable room Temperature difference measured in the second measurement;

[0031] The temperature monitoring and early warning device informs the user which room is more dangerous based on the reliability coefficient.

[0032] The present invention has the following technical effects:

[0033] (1) By designing the contact box in a spherical shape, the heat generated inside can be evenly diffused to the surrounding area, preventing it from concentrating in a certain part of the contact box and improving the uniformity of heat distribution on the contact box shell. A heat sink is provided at the rear end of the contact box, intersecting the extension direction of the contact box shell. That is, the end of the heat sink and the outer side of the contact box are on the same sphere, which can reduce the probability of collision damage when the contact box comes into contact with other components, protect the heat sink, and ensure the heat dissipation effect. A removable liner is provided inside the contact box, and its material is the same as that of the contact box, reducing the need for cleaning inside the contact box.

[0034] (2) The original traditional partition was abandoned and the partition was set as a vertical partition and a horizontal partition. The vertical partition was set as part of a spherical shell and the horizontal partition was set as part of a cylinder, which improved the impact resistance of the partition and allowed the impact airflow to be guided by the arc surface of the partition. At the same time, protrusions were also set, which also served to reinforce the partition and guide the airflow.

[0035] (3) A pressure relief plate is provided. The pressure relief plate has a hemispherical shell structure. When there is an impact airflow, the pressure relief plate will be directly impacted by the airflow and will be blown away first. However, because there are air holes on it, it can not only exhaust the high temperature gas through the cooling fan, but also reduce the impact effect. More importantly, the spherical surface can guide the high pressure impact airflow to its surroundings, disperse the pressure of the pressure relief plate, reduce the speed of flying out, and prevent injury to personnel.

[0036] (4) It is equipped with a temperature monitoring and early warning device, which reminds users of the current indoor temperature based on the reliability coefficient, making it easier for users to understand how to operate, reducing the user's calculations and improving the accuracy of operation. Attached Figure Description

[0037] Figure 1 This is a side view of a high-voltage switchgear in the prior art.

[0038] Figure 2 This is a front view of a high-voltage switchgear in the prior art.

[0039] Figure 3 This is a schematic diagram of the internal structure of the high-voltage switchgear of the present invention.

[0040] Figure 4 This is a front view of the contact box inside the high-voltage switchgear of the present invention.

[0041] Figure 5 This is a view of one end of the contact box inside the high-voltage switchgear of the present invention.

[0042] Figure 6 This is a schematic diagram of the internal structure of the contact box of the present invention.

[0043] Figure 7 This is the partition between the busbar compartment and the cable compartment of the present invention.

[0044] Figure 8 This is a partial internal diagram of the high-voltage switchgear of the present invention. Figure 1 .

[0045] Figure 9 This is a partial internal diagram of the high-voltage switchgear of the present invention. Figure 2 .

[0046] Figure 10 This is a top view of the heat dissipation mechanism of the present invention.

[0047] The diagram shows: 1. Cabinet; 2. External pipe; 3. Instrument compartment; 4. Handcart compartment; 5. Busbar compartment; 6. Cable compartment; 7. Handcart; 8. Contact box; 9. Busbar; 10. Partition; 11. Handcart compartment cover; 12. Busbar compartment cover; 13. Cable compartment cover; 14. Vertical partition; 15. Horizontal partition; 16. Spherical contact box; 17. First temperature measuring point A; 28. Second temperature measuring point B; 39. Third temperature measuring point C; 18. Pressure relief component; 19. Housing; 20. Connection end; 21. Rear end; 22. Heat sink; 23. Through hole; 24. Connecting wire; 25. Corrugated skirt structure; 26. Stationary contact; 27. Liner; 28. Annular shield; 29. ​​Protrusion; 30. Cooling fan; 30. Horizontal reference plane X; Vertical reference plane Y. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0051] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0052] This invention discloses a high-voltage switchgear based on a modular structure, which improves the safety of the high-voltage switchgear in terms of both structure and monitoring.

[0053] Reference Appendix Figure 1 , 2 It demonstrates the existing structure of high-voltage switchgear cabinets and their internal components.

[0054] like Figure 2 As shown, the high-voltage switchgear has a cabinet 1 and an external connecting pipe 2 extending from the cabinet 1. Electrical components are installed inside the cabinet 1, and the external connecting pipe 2 is used to connect to external equipment through the cabinet. To enable modular installation and management of the electrical components inside the cabinet 1, an instrument room 3, a handcart room 4, a busbar room 5, and a cable room 6 are installed inside the cabinet 1. The instrument room 3 is equipped with measuring instruments, and the handcart room 4 is equipped with a handcart 7.

[0055] Embodiment 1 of the present invention

[0056] This implementation plan is based on the attached document. Figure 2 As shown, a contact box 8 is provided inside the cabinet 1. The upper contact box 8 is connected to the busbar connector 10 through the busbar 9, and the lower contact box 8 is connected to the current and voltage transformer. A non-flat partition 11 is provided between the busbar compartment 5 and the cable compartment 6. A handcart compartment cover 12, a busbar compartment cover 13, and a cable compartment cover 14 are respectively provided above the handcart compartment cover 4, the busbar compartment cover 5, and the cable compartment cover 6. A cover plate assembly that is not integrated with the handcart compartment cover 12, the busbar compartment cover 13, and the cable compartment cover 14 is provided on each of them.

[0057] In this embodiment, by setting the partition 11 to a non-flat structure, the flat partition structure in the prior art is changed, and the impact resistance of the partition is improved when subjected to impact airflow. The original structure of each chamber cover being an integral structure is redesigned into a split structure, which can reduce the impact force on the remaining parts when part is opened by impact, maximize the protection of the cabinet, and improve the impact resistance of the entire cabinet.

[0058] Embodiment 2 of the present invention

[0059] Reference Appendix Figure 3 , 7As shown, in this embodiment, based on the aforementioned embodiment 1, the vertical portion of the non-flat partition 11 is further configured as a vertically oriented partition 15, and the horizontal portion of the non-flat partition 11 is configured as a horizontal partition 16. The vertically oriented partition 15 is part of a spherical shell, and the horizontal partition 16 is part of a circular tube. The vertically oriented partition 15 and the horizontal partition 16 are integrally formed.

[0060] Based on the original non-flat partition structure, in this embodiment the partition is set as a combination of part spherical shell and part cylindrical / tube, which improves the flow guiding effect of the partition, protects the busbar compartment, and reduces damage to the cabinet.

[0061] like Figure 7 As shown, in order to further improve the impact resistance and airflow guiding effect of the new partition and reduce the interference of the newly added components on the effect, two reference surfaces are set as follows: a horizontal reference surface X is set, and the vertical partition 15 is symmetrical about the horizontal reference surface X in the middle; a vertical reference surface Y is set, which is tangent to the outer side of the vertical partition 15 and parallel to the left side panel of the cabinet 1.

[0062] Based on the pre-designed reference surface, multiple hemispherical protrusions 29 are provided on the lower side of the vertically oriented partition 15 and the lower side of the horizontal partition 16, such as... Figure 7 In the middle, the protrusions 29 do not exceed the horizontal reference plane X and the vertical reference plane Y. The protrusions 29 are shells integrally formed with the vertically oriented partition 15 and the horizontal partition 16, that is, they protrude outward from the busbar chamber 5.

[0063] In this implementation scheme, the traditional baffle is abandoned and the baffle is set as a vertically running baffle and a horizontal baffle. The vertically running baffle is set as part of a spherical shell and the horizontal baffle is set as part of a cylinder, which improves the impact resistance of the baffle and allows the impact airflow to be guided by the arc surface of the baffle. At the same time, protrusions are also provided, which also serve to reinforce the baffle and guide the airflow.

[0064] Embodiment 3 of the present invention

[0065] Reference Appendix Figure 3 As shown, in this embodiment, based on the aforementioned embodiment 2, a spherical contact box 17 is further provided between the handcart 7 and the busbar 9 and the current and voltage transformers. By setting the contact box in a spherical shape, the heat generated inside can be evenly diffused to the surrounding area, and will not be concentrated in a certain part of the contact box. It can also improve the degree of uniform distribution of heat on the contact box shell.

[0066] like Figure 4 , 5As shown in Figure 6, the spherical contact box 17 has a shell 19, which is a shell-like component formed by symmetrically removing both ends of an integral spherical shell. A connecting end 20 is provided at the front end of the shell 19, and a heat sink 22 is provided on the planar rear end 21 of the shell 19. The heat sink 22 is composed of heat sink columns arranged in an array, and the heat sink columns are of different lengths. The free ends of the heat sink columns at the rear end 21 coincide with the extension surface of the outer side of the shell 19. A heat sink fin is provided at the rear end of the contact box, which intersects with the extension direction of the contact box shell. That is, the end of the heat sink fin and the outer side of the contact box are on the same sphere, which can reduce the probability of collision damage when the contact box comes into contact with other components, protect the heat sink fin, and ensure the heat dissipation effect. A ring-shaped pleated skirt structure 25 is provided on the front side of the housing 19. A through hole 23 is provided at the rear of the housing 19. A stationary contact 26 is provided inside the housing 19. The stationary contact 26 is connected to the busbar 9 through the through hole 23 via a connecting line 24. A removable ring-shaped inner liner 27 of the same material as the housing 19 is provided on the inner side of the housing 19. A removable inner liner of the same material as the contact box is provided inside the contact box to reduce cleaning inside the contact box. A ring-shaped shield 28 is provided between the inner liner 27 and the housing 19.

[0067] Embodiment 4 of the present invention

[0068] Reference Appendix Figure 3 , 8 As shown in Figures 9 and 10, in this embodiment, based on the aforementioned embodiment 3, the cover plate assembly is further modified to include a pressure relief component 18, which has a hemispherical shell structure. The spherical surface can guide the high-pressure impact airflow to its surroundings, dispersing the pressure of the pressure relief plate, reducing the ejection speed, and preventing injury to personnel. Furthermore, multiple air holes are evenly distributed on the pressure relief component 18. When there is an impact airflow, the pressure relief plate directly faces the impact of the airflow and will be initially blown away. However, due to the air holes, not only can the high-temperature gas be discharged through the cooling fan, but the impact effect can also be mitigated.

[0069] The pressure relief component 18 has an extension at its edge, which is connected to the handcart compartment cover 12, the busbar compartment cover 13, and the cable compartment cover 14 respectively by screws. The pressure relief component 18 is detachably arranged downwards, and a cooling fan 30 is provided inside the pressure relief component 18. The cooling fan 30 is fixedly connected to the extension of the pressure relief component, and the cooling fan 30 does not protrude from the upper surface of the cabinet 1.

[0070] Furthermore, such as Figure 3As shown, the pressure relief components 18 on the handcart compartment 4 and busbar compartment 5 are located in the middle of the cover plate, while the pressure relief component 18 on the cable compartment 6 is located slightly to the left of the middle of the cover plate, preferably on the left side of the vertical reference plane Y. In case of danger, it can directly face the high-temperature gas in the cable compartment 6, thereby increasing the effect of gas pressure relief.

[0071] To further monitor the internal temperature of the high-voltage switchgear, the high-voltage switchgear is also equipped with a modular temperature monitoring and early warning device. The temperature monitoring and early warning device includes an ambient temperature sensor located outside the cabinet 1, a temperature sensor a located inside the handcart compartment 4, a temperature sensor b located inside the busbar compartment 5, and a temperature sensor c located inside the cable compartment 6.

[0072] like Figure 3 As shown, temperature sensors a, b, and c are respectively set at the first temperature measuring point A, the second temperature measuring point B, and the third temperature measuring point C. Temperature sensors a, b, and c transmit the measured values ​​to the instrument room 3 for real-time display.

[0073] Importantly, the selection rules for temperature measurement points in this invention...

[0074] (1) Set the total height of the cabinet 1 to h;

[0075] (2) The temperature measuring point should be pre-set on the outer side of the pressure relief component 18;

[0076] (3) Determine the locations of the high-temperature sources in the handcart compartment 4, the busbar compartment 5, and the cable compartment 6, respectively;

[0077] (4) Identify the center of all high-temperature source areas in each indoor space;

[0078] (5) Determine whether the vertical distance from the center of the high-temperature source area to the preset temperature measurement point is greater than 1 / 4h or 1 / 5h;

[0079] (7) If the value is greater than 0, it means that the selected preset temperature measurement point cannot obtain the required measurement value in a timely and accurate manner. Change the temperature measurement point and set it in the center of the high temperature source area. If the value is less than 0, it means that the selected preset temperature measurement point meets the requirements for timely and accurate acquisition of measurement values ​​and does not need to be moved.

[0080] Ambient temperature sensor, temperature sensor a, temperature sensor b, and temperature sensor c are used to measure , , and .

[0081] Based on the normal operating temperature of the high-voltage switchgear , , Calculate temperature difference , , .

[0082] Calculate the temperature difference during actual operation of the high-voltage switchgear. , , .

[0083] Compare separately , , If the temperature exceeds the set threshold, it is considered too high.

[0084] Overheating of high-voltage switchgear can cause serious accidents, and simply comparing the difference with a set threshold is insufficient to provide operators with accurate operational alerts. Therefore, a reliability factor is introduced. Its expression is

[0085]

[0086] Similarly, calculate ;

[0087] in, For the handcart room Temperature difference measured in the second measurement;

[0088] In calculation hour,

[0089] For busbar compartment Temperature difference measured in the second measurement;

[0090] For cable room Temperature difference measured in the second measurement;

[0091] The temperature monitoring and early warning device informs the user which room is more dangerous based on the reliability coefficient.

[0092] The present invention has the following technical effects:

[0093] (1) By designing the contact box in a spherical shape, the heat generated inside can be evenly diffused to the surrounding area, preventing it from concentrating in a certain part of the contact box and improving the uniformity of heat distribution on the contact box shell. A heat sink is provided at the rear end of the contact box, intersecting the extension direction of the contact box shell. That is, the end of the heat sink and the outer side of the contact box are on the same sphere, which can reduce the probability of collision damage when the contact box comes into contact with other components, protect the heat sink, and ensure the heat dissipation effect. A removable liner is provided inside the contact box, and its material is the same as that of the contact box, reducing the need for cleaning inside the contact box.

[0094] (2) The original traditional partition was abandoned and the partition was set as a vertical partition and a horizontal partition. The vertical partition was set as part of a spherical shell and the horizontal partition was set as part of a cylinder, which improved the impact resistance of the partition and allowed the impact airflow to be guided by the arc surface of the partition. At the same time, protrusions were also set, which also served to reinforce the partition and guide the airflow.

[0095] (3) A pressure relief plate is provided. The pressure relief plate has a hemispherical shell structure. When there is an impact airflow, the pressure relief plate will be directly impacted by the airflow and will be blown away first. However, because there are air holes on it, it can not only exhaust the high temperature gas through the cooling fan, but also reduce the impact effect. More importantly, the spherical surface can guide the high pressure impact airflow to its surroundings, disperse the pressure of the pressure relief plate, reduce the speed of flying out, and prevent injury to personnel.

[0096] (4) It is equipped with a temperature monitoring and early warning device, which reminds users of the current indoor temperature based on the reliability coefficient, making it easier for users to understand how to operate, reducing the user's calculations and improving the accuracy of operation.

[0097] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-voltage switchgear based on a modular structure, comprising a cabinet (1) and an external connecting pipe (2) extending out of the cabinet (1), wherein an instrument room (3), a handcart room (4), a busbar room (5), and a cable room (6) are provided inside the cabinet (1), wherein measuring instruments are provided in the instrument room (3), and a handcart (7) is provided in the handcart room (4), characterized in that: Inside the cabinet (1), there is a contact box (8). The upper contact box (8) is connected to the busbar connector (10) via the busbar (9). The lower contact box (8) is connected to the current and voltage transformer. A non-flat partition (11) is provided between the busbar compartment (5) and the cable compartment (6). A handcart compartment cover (12), a busbar compartment cover (13), and a cable compartment cover (14) are respectively provided above the handcart compartment (4), the busbar compartment (5), and the cable compartment (6). A cover plate assembly that is not integrated with the handcart compartment cover (12), the busbar compartment cover (13), and the cable compartment cover (14) is provided on each of them. The vertical portion of the non-flat partition (11) is set as an up-down partition (15), and the horizontal portion of the non-flat partition (11) is set as a horizontal partition (16). The up-down partition (15) is part of a spherical shell, and the horizontal partition (16) is part of a circular tube. The up-down partition (15) and the horizontal partition (16) are integrally formed. The vertically oriented partition (15) is symmetrical about the horizontal reference plane X in the middle and is provided with a vertical reference plane Y. The vertical reference plane Y is tangent to the outer side of the vertically oriented partition (15) and is parallel to the left side panel of the cabinet (1). Multiple hemispherical protrusions (29) are provided on the lower side of the vertically oriented partition (15) and the lower side of the horizontal partition (16). The protrusions (29) do not exceed the horizontal reference plane X and the vertical reference plane Y. The protrusions (29) are shells integrally formed with the vertically oriented partition (15) and the horizontal partition (16).

2. The high-voltage switchgear based on a modular structure according to claim 1, characterized in that: A spherical contact box (17) is provided between the handcart (7) and the busbar (9) and the current and voltage transformers.

3. A high-voltage switchgear based on a modular structure according to claim 2, characterized in that: The spherical contact box (17) has a shell (19), which is a shell-shaped part formed by symmetrically removing both ends of an integral spherical shell. A connecting end (20) is provided at the front end of the shell (19), and a heat sink (22) is provided on the planar rear end (21) of the shell (19). The heat sink (22) is composed of heat sink columns distributed in an array, and the lengths of the heat sink columns are different. The free ends of the heat sink columns form an extension surface at the rear end (21) that coincides with the outer surface of the shell (19).

4. A high-voltage switchgear based on a modular structure according to claim 3, characterized in that: A ring-shaped pleated skirt structure (25) is provided on the front side of the housing (19), and a through hole (23) is provided at the rear of the housing (19). A stationary contact (26) is provided inside the housing (19), and the stationary contact (26) is connected to the busbar (9) through the through hole (23) via a connecting line (24) connected to it. A removable ring-shaped inner liner (27) made of the same material as the housing (19) is provided on the inner side of the housing (19), and a ring-shaped shield (28) is provided between the inner liner (27) and the housing (19).

5. A high-voltage switchgear based on a modular structure according to claim 4, characterized in that: The cover plate assembly is a pressure relief component (18). The pressure relief component (18) has a hemispherical shell structure and multiple air holes are provided on the pressure relief component (18). The air holes are evenly distributed on the pressure relief component (18). The edge of the pressure relief component (18) has an extension. The extension is connected to the handcart compartment cover plate (12), the busbar compartment cover plate (13), and the cable compartment cover plate (14) by screws. The pressure relief component (18) is detachably arranged downwards. A cooling fan (30) is provided inside the pressure relief component (18). The cooling fan (30) is fixedly connected to the extension of the pressure relief component. The cooling fan (30) does not protrude from the upper surface of the cabinet (1).

6. A high-voltage switchgear based on a modular structure according to claim 5, characterized in that: Temperature sensors a, b, and c are respectively installed in the handcart compartment (4), the busbar compartment (5), and the cable compartment (6). Temperature sensors a, b, and c are located at the first temperature measuring point A, the second temperature measuring point B, and the third temperature measuring point C, respectively. Temperature sensors a, b, and c transmit the measured values ​​to the instrument compartment (3) for real-time display. The selection rules for the temperature measuring points are as follows: (1) Set the total height of the cabinet (1) to h; (2) The temperature measuring point should be pre-set on the outer side of the pressure relief component (18); (3) Determine the locations of the high-temperature sources in the handcart compartment (4), the busbar compartment (5), and the cable compartment (6), respectively; (4) Determine the center of all high-temperature source areas in each indoor space; (5) Determine whether the vertical distance from the center of the high-temperature source area to the preset temperature measurement point is greater than 1 / 4h or 1 / 5h; (6) If it is greater than, it means that the selected preset temperature measurement point cannot obtain the required measurement value in a timely and accurate manner. Change the temperature measurement point and set it in the center of the high temperature source area. If the value is less than the specified value, it means that the selected preset temperature measurement point meets the requirements for timely and accurate acquisition of measurement values, and there is no need to move it.

7. A high-voltage switchgear based on a modular structure according to claim 6, characterized in that: The high-voltage switchgear is also equipped with a modular temperature monitoring and early warning device. The temperature monitoring and early warning device includes an ambient temperature sensor installed outside the cabinet (1). The ambient temperature sensor, temperature sensor a, temperature sensor b, and temperature sensor c are used to measure the ambient temperature. , , and According to the normal operating temperature of the high-voltage switchgear , , Calculate temperature difference , , ; Calculate the temperature difference during actual operation of the high-voltage switchgear , , Compare separately , , If the temperature exceeds the set threshold, it is considered too high.

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