A cable branch box with a cooling structure

Abstract

The application relates to a cable branch box with a cooling structure, which comprises a filter piece, a filter screen installed in the filter piece, the filter piece has a containing cavity and a filter cavity communicated with the containing cavity, the filter piece has a flushing inlet and a flushing outlet, the filter cavity is communicated with the flushing inlet and the flushing outlet; the filter screen is fixed with an upper mounting piece, a lower mounting piece, an elastic piece, a sealing piece, a fixing pipe and a flushing pipe, the upper mounting piece and the lower mounting piece are respectively fixed with two ends of the filter piece, the upper mounting piece has a cooling liquid inlet, the lower mounting piece has a cooling liquid outlet, the cooling liquid inlet is communicated with the filter cavity, the cooling liquid outlet is communicated with the containing cavity, the upper mounting piece has a mounting cavity, the elastic piece is fixed in the mounting cavity, the sealing piece is connected with the elastic piece, the fixing pipe is movably installed in the mounting cavity, one end of the flushing pipe is communicated with the cooling liquid outlet, the other end of the flushing pipe is connected with the flushing inlet and communicated with the filter cavity, so that self-cleaning of the filter assembly is realized.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a cable branch box with a cooling structure. Background Technology

[0002] A cable distribution box is a key electrical device used in power distribution networks, primarily for branching, connecting, and switching cable lines. It is typically installed outdoors and serves as a hub connecting main cables to branch loads. The cable distribution box houses cable joints, switchgear, busbars, and other electrical components. During operation, it generates a significant amount of heat. If this heat cannot be dissipated promptly, the internal temperature will rise continuously, accelerating the aging of insulation materials, reducing the insulation performance of the equipment, and in severe cases, potentially causing cable overheating failures or even short circuits.

[0003] To address the aforementioned heat dissipation issues, existing technologies employ circulating liquid cooling systems to cool cable distribution boxes. This approach typically involves laying cooling pipes inside the cable distribution box or on its walls, using a circulating pump to drive the coolant in continuous circulation, transferring heat from inside the box to external heat dissipation devices. The coolant is usually water, an aqueous solution of ethylene glycol, or an insulating coolant (such as dimethyl silicone oil). Compared to traditional natural convection and forced air cooling, circulating liquid cooling offers advantages such as high heat dissipation efficiency and uniform temperature control, effectively ensuring the safe and stable operation of electrical equipment within the cable distribution box.

[0004] However, the existing filtration technology in the circulating liquid cooling system of cable branch boxes has two main problems: first, the filter components are prone to clogging; second, the sealing between the filter components and the pipes is poor. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the filter components in the existing circulating cooling system are prone to clogging, thereby providing a cable branch box with a cooling structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A cable branch box with a cooling structure includes: A filter assembly includes a filter element and a filter screen installed within the filter element. The filter element has a receiving cavity and a filter chamber communicating with the receiving cavity. The filter element has a flushing inlet and a flushing outlet, and the filter chamber is communicating with the flushing inlet and the flushing outlet. A sealing assembly includes an upper mounting component, a lower mounting component, an elastic element, a sealing element, a fixing tube, and a flushing tube. The filter screen is fixed to the upper mounting component. The upper mounting component and the lower mounting component are respectively fixed to both ends of the filter element. The upper mounting component has a coolant inlet, and the lower mounting component has a coolant outlet. The coolant inlet communicates with the filter chamber, and the coolant outlet communicates with the receiving cavity. The upper mounting component has a mounting cavity, and the elastic element is fixed in the mounting cavity. The sealing element is connected to the elastic element. The fixing tube is movably installed in the mounting cavity. One end of the flushing tube communicates with the coolant outlet, and the other end of the flushing tube is connected with the flushing inlet and communicates with the filter chamber.

[0007] Preferably, the filter screen has an L-shaped cross-section, and the filter screen includes a mounting portion and an inclined portion fixed to the lower end of the mounting portion. The upper side of the mounting portion is connected to the lower side of the upper mounting member, and the inclined portion abuts against a portion of the inner ring surface of the filter element. Along the direction close to the rinsing outlet, the distance between the inclined portion and the lower mounting member gradually decreases.

[0008] Preferably, both the upper mounting component and the lower mounting component have a limiting groove, the projection of which forms the limiting groove is gear-shaped, and one end of both the fixing tube and the flushing tube is provided with a limiting part, the projection of which is gear-shaped.

[0009] Preferably, the sealing element includes an annular portion and a compression portion integrally formed with the annular portion, the compression portion being spaced apart circumferentially along the annular portion, and the compression portion being capable of engaging with the limiting portion.

[0010] Preferably, the system includes a first valve, a water storage chamber, a circulation pipe, a second valve, a drain pipe, a third valve, and a receiving chamber. One end of the fixed pipe is connected to the first valve, the flushing pipe communicates with the water storage chamber, the water storage chamber is connected to one end of the circulation pipe, the other end of the circulation pipe is connected to the second valve, the flushing outlet is connected to one end of the drain pipe, the other end of the drain pipe is connected to the third valve, and the third valve is connected to the receiving chamber.

[0011] Preferably, the filter assembly includes a first state and a second state, wherein in the first state, the first valve is open and the second valve and the third valve are closed; and in the second state, the first valve is closed and the second valve and the third valve are open.

[0012] Preferably, the device further includes a first sealing ring, a second sealing ring, a third sealing ring, and a mounting cover. The first sealing ring is installed on the inner ring surface of the filter element and abuts against the outer ring surface of the upper mounting element. The second sealing ring and the third sealing ring are both installed on the mounting cover. The second sealing ring abuts against the upper side surface of the upper mounting element and the filter element, and the third sealing ring abuts against the outer ring surface of the fixing tube.

[0013] Preferably, the system further includes a cable branch box, a cooling plate, a circulating pump, an external heat dissipation structure, and an expansion tank. The cooling plate is installed on the upper side inside the cable branch box. One end of the cooling plate is connected to the circulating pump. The circulating pump is connected to the filter assembly. The filter assembly is connected to the external heat dissipation structure. The external heat dissipation structure is connected to the expansion tank. The expansion tank is connected to the other end of the cooling plate.

[0014] Preferably, the upper side of the limiting part is provided with a plurality of protrusions, the upper mounting member is provided with a plurality of grooves spaced apart along the circumference, and the mounting cavity communicates with the grooves.

[0015] Preferably, the upper side of the upper mounting component has a snap-fit ​​groove, and the lower side of the mounting cover is provided with a snap-fit ​​component, which can snap into the snap-fit ​​groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The cable branch box device with a cooling structure provided in the above technical solution, comprising a filter element, a filter screen, a flushing inlet, and a flushing outlet, and in conjunction with an upper mounting component, a lower mounting component, an elastic element, a sealing element, a fixed pipe, and a flushing pipe, achieves an online reverse flushing self-cleaning function. After normal filtration, the coolant can flow back into the filter chamber from the flushing inlet through the flushing pipe, flushing out impurities trapped by the filter screen from the flushing outlet, thereby effectively preventing filter screen clogging, eliminating the need for frequent disassembly and cleaning, and significantly reducing maintenance costs. Simultaneously, the elastic element compresses the sealing element to generate radial deformation, and the movable installation method of the fixed pipe and the flushing pipe ensures that all connections maintain a good seal during dynamic flushing, preventing coolant leakage and improving the reliability and safety of system operation. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1A schematic diagram of a cable branch box device with a cooling structure provided in an embodiment of the present invention; Figure 2 A schematic diagram of a filtering component provided in an embodiment of the present invention; Figure 3 A cross-sectional view of a filtering component provided in an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of part A in the middle; Figure 5 Exploded view of part of the sealing assembly and fixing tube; Figure 6 This is a cross-sectional view of part of the sealing assembly and the fixing tube; Figure 7 This is a schematic diagram of a filter screen provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Filter assembly; 11. Filter element; 111. Receiving cavity; 112. Filter chamber; 113. Flushing inlet; 114. Flushing outlet; 12. Filter screen; 121. Mounting part; 122. Inclined part; 2. Sealing assembly; 21. Upper mounting part; 211. Coolant inlet; 212. Mounting cavity; 213. Limiting groove; 22. Lower mounting part; 221. Coolant outlet; 23. Elastic element; 24. Sealing element; 241. Annular part; 242. Extrusion section; 25. Fixing pipe; 251. Limiting section; 26. Flushing pipe; 27a. First valve; 28. Water storage chamber; 29. ​​Circulation pipe; 27b. Second valve; 210. Sewage pipe; 27c. Third valve; 31a. First sealing ring; 31b. Second sealing ring; 31c. Third sealing ring; 32. Mounting cover; 33. Storage chamber; 4. Cable branch box; 5. Circulation pump; 6. External heat dissipation structure; 7. Expansion tank. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention from the specific circumstances.

[0023] Please read carefully. Figures 1 to 6 This invention provides a cable branch box with a cooling structure, wherein the cooling structure inside the cable branch box 4 is a closed-loop liquid cooling system. The closed-loop liquid cooling system can be installed inside or outside the cable branch box 4. The working principle of the closed-loop liquid cooling system is as follows: the circulating pump 5 drives the coolant to flow continuously. First, the coolant flows through the cooling plate to absorb the heat from the electronic components inside the cable branch box 4. The cooling plate is installed on the upper side inside the cable branch box 4. The hotter gas inside the cable branch box 4 moves upward, and the heated coolant then enters the filter assembly 1 to remove any impurities that may be carried in the circulation, thus protecting subsequent pipelines and components. Next, the coolant flows into the external heat dissipation structure 6 (including a heat exchanger and a fan) to release heat to the external environment, reducing its own temperature. The cooled coolant then flows to the expansion tank 7, where it balances the volume fluctuations caused by temperature changes and maintains stable pressure. Finally, it flows back to the cooling plate to begin the next cycle. The coolant continuously circulates in this way, transferring heat from inside the cable branch box 4 to the outside, ensuring that the equipment always operates stably within a safe temperature range.

[0024] Specifically, the filter assembly 1 includes a filter component 1 and a sealing assembly 2. The filter assembly 1 includes a filter element 11 and a filter screen 12 installed in the filter element 11. The filter element 11 has a receiving cavity 111 and a filter cavity 112 communicating with the receiving cavity 111. Solid waste in the coolant remains in the filter cavity 112, and the filtered coolant flows into the receiving cavity 111. The filter element 11 has a flushing inlet 113 and a flushing outlet 114, and the filter cavity 112 communicates with the flushing inlet 113 and the flushing outlet 114.

[0025] The sealing assembly 2 has the same sealing structure installed at both ends of the filter element 11. The assembly includes an upper mounting part 21, a lower mounting part 22, an elastic element 23, a sealing element 24, a fixing tube 25, and a flushing tube 26. The filter screen 12 is fixed to the upper mounting part 21. The upper mounting part 21 and the lower mounting part 22 are respectively fixed to both ends of the filter element 11. The upper mounting part 21 has a coolant inlet 211, and the lower mounting part 22 has a coolant outlet 221. The coolant inlet 211 is connected to the filter chamber 112, and the coolant outlet 221 is connected to the receiving chamber 111. The upper mounting part 21 has a mounting chamber 212. The elastic element 23 is fixed in the mounting chamber 212. The sealing element 24 is connected to the elastic element 23. The fixing tube 25 is movably installed in the mounting chamber 212. One end of the flushing tube 26 is connected to the coolant outlet 221, and the other end of the flushing tube 26 is connected to the flushing inlet 113 and is connected to the filter chamber 112.

[0026] It is understood that coolant flows into filter chamber 112 from coolant inlet 211, and solid waste in the coolant remains in filter chamber 112. The filtered coolant flows into receiving chamber 111 and out from coolant outlet 221. Every once in a while, coolant inlet 211 is closed, and coolant outlet 221, flushing inlet 113, and flushing outlet 114 are opened. The filtered coolant flows out from coolant outlet 221 and into flushing inlet 113, flushing filter chamber 112 and flushing out solid waste. This achieves the reverse flow flushing of filter chamber 112 using circulating cooling, thereby solving the problem of easy clogging of filter assembly 1. When the flushing pipe 26 is installed with the upper mounting part 21, the flushing pipe 26 presses the sealing element 24 and the elastic element 23 downward in the vertical direction. The elastic element 23 is subjected to the downward compression force in the vertical direction and generates the elastic force in the opposite direction, which presses the sealing element 24 axially, causing the sealing element 24 to deform radially, thereby realizing the sealing effect between the fixed pipe 25 and the upper mounting part 21. The sealing structure between the flushing pipe 26 and the lower mounting part 22 is the same, which plays the first sealing role.

[0027] Please refer to the following carefully. Figure 7The filter screen 12 has an L-shaped cross-section. The coolant inlet 211 is located above the filter screen 12. The L-shaped filter screen 12 and the inner ring surface of part of the filter element 11 together form a filter chamber 112 and a receiving chamber 111. The filter screen 12 includes a mounting part 121 and an inclined part 122 fixed to the lower end of the mounting part 121. The upper side of the mounting part 121 is fixedly connected to the lower side of the upper mounting part 21. The fixing method is not limited. Alternatively, the upper side of the mounting part 121 can be detachably connected to the lower side of the upper mounting part 21. The connection method is not limited. The filter screen 12 has an open structure, which makes cleaning and replacement convenient. The inclined part 122 abuts against the inner ring surface of part of the filter element 11. Along the direction close to the flushing outlet 114, the distance between the inclined part 122 and the lower mounting part 22 gradually decreases. The inclined part 122 is inclined downward and along the vertical direction. The end of the inclined part 122 close to the flushing outlet 114 is located below the flushing outlet 114. Due to the weight of the solid waste itself, the solid waste will slide towards the lower part of the inclined section 122, making it easier to flush out the solid waste during the backwashing process and achieve self-cleaning of the filter component 1.

[0028] Both the upper mounting component 21 and the lower mounting component 22 have a limiting groove 213, the projection of which forms the limiting groove 213 is gear-shaped. One end of the fixing pipe 25 and the flushing pipe 26 is provided with a limiting part 251, the projection of which is gear-shaped. The inner ring surface of the limiting groove 213 abuts against the outer ring surface of the limiting part 251. The upper side of the limiting part 251 is provided with a small protrusion. The upper mounting component 21 and the lower mounting component 22 are provided with grooves. During installation, the protrusion of the limiting part 251 first misaligns with the protrusion of the limiting groove 213. When the limiting part 251 moves into the mounting cavity 212, it is rotated so that the protrusion of the limiting part 251 overlaps with the protrusion of the limiting groove 213 and engages with the groove respectively, thereby achieving the limiting. During this process, the limiting part 251 will squeeze the elastic member 23 and the sealing member 24 in the vertical direction. The elastic member 23 is subjected to the downward compression force in the vertical direction, generating the elastic force in the opposite direction, and squeezing the sealing member 24 in the axial direction.

[0029] The sealing element 24 includes an annular portion 241 and a compression portion 242 integrally formed with the annular portion 241. The compression portions 242 are spaced apart circumferentially along the annular portion 241. The compression portions 242 can engage with the limiting portion 251. The outer annular surfaces of the annular portion 241 and the compression portion 242 abut against the inner annular surface of the mounting cavity 212. The inner annular surfaces of the annular portion 241 and the compression portion 242 abut against the outer annular surface of the fixing tube 25. When the fixing tube 25 is located in the mounting cavity 212, the fixing tube 25 drives the limiting portion 251, and the limiting portion 251 engages with the compression portion 242. The compression portion 242 is deformed by compression, which enhances the sealing performance.

[0030] The present invention also includes a first valve 27a, a water storage chamber 28, a circulation pipe 29, a second valve 27b, a drain pipe 210, a third valve 27c, and a receiving chamber 33. One end of the fixing pipe 25 is connected to the first valve 27a, the flushing pipe 26 communicates with the water storage chamber 28, the water storage chamber 28 is connected to one end of the circulation pipe 29, the other end of the circulation pipe 29 is connected to the second valve 27b, the flushing outlet 114 is connected to one end of the drain pipe 210, the other end of the drain pipe 210 is connected to the third valve 27c, and the third valve 27c is connected to the receiving chamber 33. All connections must be sealed or sealed. The filter assembly 1 includes a first state and a second state. In the first state, the filter assembly 1 is in a filtering state; in the second state, the filter assembly 1 is in a backwashing state. First state: First valve 27a is open, circulating coolant flows into coolant inlet 211, passes through filter screen 12, part of the circulating coolant flows out of coolant outlet 221 and flows to external heat dissipation structure 6, and the other part flows into water storage chamber 28 for storage. Second valve 27b and third valve 27c are closed to achieve filtration of coolant. Second state: First valve 27a is closed, second valve 27b and third valve 27c are open, and the filtered coolant stored in water storage chamber 28 flows into filter chamber 112 through circulation pipe 29 to flush solid waste in the chamber before filtration into collection chamber 33, thereby cleaning filter component 1. In addition, a water pump can be installed in the backwashing structure to provide power for backwashing.

[0031] The present invention also includes a first sealing ring 31a, a second sealing ring 31b, a third sealing ring 31c, and a mounting cover 32. The first sealing ring 31a is installed on the inner ring surface of the filter element 11 and abuts against the outer ring surface of the upper mounting member 21 to ensure the sealing between the inner ring surface of the filter element 11 and the outer ring surface of the upper mounting member 21. The first sealing ring 31a and the sealing member 24 together achieve the first sealing function. The second sealing ring 31b and the third sealing ring 31c are both installed on the mounting cover 32. The second sealing ring 31b abuts against the upper side surface of the upper mounting member 21 and the upper side surface of the filter element 11. The projection of b is located above the contact point between the inner ring surface of the filter element 11 and the outer ring surface of the upper mounting element 21, ensuring the seal between the inner ring surface of the filter element 11 and the outer ring surface of the upper mounting element 21. The third sealing ring 31c abuts against the outer ring surface of the fixing tube 25, ensuring the seal between the upper mounting element 21 and the fixing tube 25. The second sealing ring 31b and the third sealing ring 31c together achieve a second sealing effect. In addition, the mounting cover 32 is provided with internal threads, which can be connected to the external threads on the outer ring surface of the filter element 11. This serves to fix the installation and, during installation, can compress the second sealing ring 31b to enhance the seal. The lower mounting element 22 and the upper mounting element 21 have symmetrical sealing structures. The upper side of the upper mounting element 21 has a snap-fit ​​groove, and the lower side of the mounting cover 32 has a snap-fit ​​component that can snap into the snap-fit ​​groove. The upper mounting element 21 and the lower mounting element 22 are detachably connected to the mounting cover 32. The connection method is not limited, or a nut can be used for connection, facilitating the replacement of various components.

[0032] Working principle: During normal circulation, the coolant enters the filter chamber 112 through the coolant inlet 211, passes through the L-shaped filter screen 12 to intercept impurities, flows into the receiving chamber 111, and is then discharged from the coolant outlet 221 to participate in system heat dissipation. At the same time, some clean coolant is temporarily stored in the water storage chamber 28 for later use. When it is necessary to clean the filter screen 12, the valve state is switched so that the clean coolant in the water storage chamber 28 is reversed and injected into the filter chamber 112 through the flushing pipe 26 from the flushing inlet 113. The reverse coolant is used to flush the filter screen 12, and the impurities are discharged from the flushing outlet 114 through the drain pipe 210 into the receiving chamber 33, realizing online backflushing without stopping the machine. During this process, the inclined portion 122 of the L-shaped filter screen 12 uses gravity to assist impurities to slide down toward the flushing outlet 114, improving the sewage discharge efficiency; while the sealing assembly 2 generates radial deformation by squeezing the sealing member 24 through the elastic member 23, and cooperates with the rotational engagement of the gear-shaped limiting groove 213 and the limiting part 251 to ensure the long-term sealing reliability of the flushing pipe 26 and the fixed pipe 25 installation location.

[0033] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A cable branch box having a cooling structure, characterized by, include: A filter assembly (1) includes a filter element (11) and a filter screen (12) installed in the filter element (11). The filter element (11) has a receiving cavity (111) and a filter cavity (112) communicating with the receiving cavity (111). The filter element (11) has a flushing inlet (113) and a flushing outlet (114). The filter cavity (112) is in communication with the flushing inlet (113) and the flushing outlet (114). The sealing assembly (2) includes an upper mounting part (21), a lower mounting part (22), an elastic element (23), a sealing element (24), a fixing tube (25), and a flushing tube (26). The filter screen (12) is fixed to the upper mounting part (21). The upper mounting part (21) and the lower mounting part (22) are respectively fixed to both ends of the filter element (11). The upper mounting part (21) has a coolant inlet (211), and the lower mounting part (22) has a coolant outlet (221). The coolant inlet (211) is connected to the filter chamber (112). The coolant outlet (221) is connected to the receiving cavity (111), the upper mounting part (21) has a mounting cavity (212), the elastic element (23) is fixed in the mounting cavity (212), the sealing element (24) is connected to the elastic element (23), the fixing tube (25) is movably installed in the mounting cavity (212), one end of the flushing tube (26) is connected to the coolant outlet (221), the other end of the flushing tube (26) is connected to the flushing inlet (113) and is connected to the filter cavity (112).

2. The cable branch box with a cooling structure according to claim 1, characterized in that, The filter screen (12) has an L-shaped cross-section. The filter screen (12) includes a mounting part (121) and an inclined part (122) fixed to the lower end of the mounting part (121). The upper side of the mounting part (121) is connected to the lower side of the upper mounting member (21). The inclined part (122) abuts against part of the inner ring surface of the filter element (11). Along the direction close to the rinsing outlet (114), the distance between the inclined part (122) and the lower mounting member (22) gradually decreases.

3. The cable branch box with a cooling structure according to claim 2, characterized in that, Both the upper mounting part (21) and the lower mounting part (22) have a limiting groove (213), and the projection of the limiting groove (213) is gear-shaped. One end of the fixing tube (25) and the flushing tube (26) are provided with a limiting part (251), and the projection of the limiting part (251) is gear-shaped.

4. The cable branch box with a cooling structure according to claim 3, characterized in that, The sealing element (24) includes an annular portion (241) and an extrusion portion (242) integrally formed with the annular portion (241). The extrusion portion (242) is circumferentially spaced along the annular portion (241) and can engage with the limiting portion (251).

5. The cable branch box with a cooling structure according to claim 1, characterized in that, It includes a first valve (27a), a water storage chamber (28), a circulation pipe (29), a second valve (27b), a drain pipe (210), a third valve (27c), and a receiving chamber (33). One end of the fixed pipe (25) is connected to the first valve (27a), the flushing pipe (26) is connected to the water storage chamber (28), the water storage chamber (28) is connected to one end of the circulation pipe (29), the other end of the circulation pipe (29) is connected to the second valve (27b), the flushing outlet (114) is connected to one end of the drain pipe (210), the other end of the drain pipe (210) is connected to the third valve (27c), and the third valve (27c) is connected to the receiving chamber (33).

6. The cable branch box with cooling structure according to claim 5, wherein the filter assembly (1) includes a first state and a second state, wherein in the first state: the first valve (27a) is open and the second valve (27b) and the third valve (27c) are closed; and in the second state: the first valve (27a) is closed and the second valve (27b) and the third valve (27c) are open.

7. The cable branch box with a cooling structure according to claim 6, characterized in that, It also includes a first sealing ring (31a), a second sealing ring (31b), a third sealing ring (31c), and a mounting cover (32). The first sealing ring (31a) is installed on the inner ring surface of the filter element (11) and abuts against the outer ring surface of the upper mounting member (21). The second sealing ring (31b) and the third sealing ring (31c) are both installed on the mounting cover (32). The second sealing ring (31b) abuts against the upper side surface of the upper mounting member (21) and the filter element (11), and the third sealing ring (31c) abuts against the outer ring surface of the fixing tube (25).

8. The cable branch box with a cooling structure according to claim 1, characterized in that, It also includes a cable branch box (4), a cooling plate, a circulating pump (5), an external heat dissipation structure (6), and an expansion tank (7). The cooling plate is installed on the upper side inside the cable branch box (4). One end of the cooling plate is connected to the circulating pump (5). The circulating pump (5) is connected to the filter assembly (1). The filter assembly (1) is connected to the external heat dissipation structure (6). The external heat dissipation structure (6) is connected to the expansion tank (7). The expansion tank (7) is connected to the other end of the cooling plate.

9. The cable branch box with a cooling structure according to claim 3, characterized in that, The upper side of the limiting part (251) is provided with a plurality of protrusions, and the upper mounting part (21) is provided with a plurality of grooves spaced apart along the circumference, and the mounting cavity (212) communicates with the grooves.

10. The cable branch box with a cooling structure according to claim 7, characterized in that, The upper side of the upper mounting part (21) has a snap-fit ​​groove, and the lower side of the mounting cover (32) is provided with a snap-fit ​​member, which can snap-fit ​​with the snap-fit ​​groove.

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