A complete set of pole-mounted circuit breakers

Abstract

This invention relates to the field of power technology, specifically to an integrated pole-mounted circuit breaker, comprising a mechanism box, three equidistantly arranged three-phase poles mounted on the upper surface of the mechanism box, a base box mounted at the bottom of the mechanism box, multiple strip-shaped openings evenly distributed on the bottom of the base box, a notch machined at the lower part of one side of the base box, a heat-conducting plate slidably mounted inside the base box, multiple heat dissipation fins evenly mounted on the lower surface of the heat-conducting plate, the heat dissipation fins being inserted into the strip-shaped openings, a sealing strip provided in the notch, the sealing strip being connected to the multiple heat dissipation fins, a side box mounted on one side of the mechanism box, a linkage component slidably mounted inside the side box for driving the sealing strip up and down. This invention has the following beneficial effects: it can automatically clean the small amount of floating dust adhering to the surface of the heat dissipation fins without manual cleaning, keeping the surface of the heat dissipation fins clean, and ensuring that the heat exchange efficiency between the heat dissipation fins and the outside air is always at its optimal state.

Description

Technical Field

[0001] This invention relates to the field of power technology, specifically to an integrated pole-mounted circuit breaker. Background Technology

[0002] The three-phase pole-type circuit breaker is one of the mainstream structural forms. It consists of three-phase poles, a mechanism box, and internal transmission components. Its core operating component is a lightweight, miniature spring-operated mechanism, which is installed entirely inside the mechanism box. This type of circuit breaker offers stable and reliable breaking performance, eliminates the safety hazards of combustion or explosion during operation, and features a lightweight design, small size, and light weight. It also enables long-term maintenance-free outdoor operation, extending the actual service life of the equipment. Therefore, it is a highly adaptable type of circuit breaker for outdoor power distribution scenarios.

[0003] To address the heat dissipation issue of the mechanism box during outdoor operation, the industry commonly employs adding multiple sets of fixed heat dissipation fins to the surface of the mechanism box. This increases the heat dissipation area, accelerates heat conduction, and ensures that the internal spring operating mechanism operates at a suitable temperature. However, during long-term outdoor use, these fixed heat dissipation fins are highly susceptible to the accumulation of dust, willow catkins, sand, and other debris on their surface. Furthermore, the structural characteristics of the heat dissipation fins allow this debris to accumulate in the gaps and on the surface, making it difficult for it to fall off naturally. Over time, a layer of dirt forms on the fin surface, hindering heat exchange between the heat dissipation fins and the outside air, significantly reducing heat dissipation efficiency. If the heat dissipation effect continues to deteriorate, the heat inside the mechanism box cannot be dissipated in time, affecting the transmission accuracy and component performance of the internal spring operating mechanism. This indirectly affects the overall operational stability of the circuit breaker, creating potential safety hazards for outdoor power distribution operations. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an integrated pole-mounted circuit breaker to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated pole-mounted circuit breaker, comprising: The mechanism box has three equidistant three-phase poles installed on its upper surface, multiple communication ports are evenly opened at the bottom of the mechanism box, and multiple vertical openings are evenly opened on one side of the mechanism box. A base box is installed at the bottom of the mechanism box. The communication port is located inside the base box. Multiple strip-shaped openings are evenly distributed on the bottom of the base box. A notch is machined at the lower part of one side of the base box. The strip-shaped openings communicate with the notch. A heat-conducting plate is slidably installed inside the base box. Multiple heat dissipation fins are evenly distributed on the lower surface of the heat-conducting plate. The heat dissipation fins are inserted into the strip-shaped openings. A sealing strip is provided in the notch. The sealing strip is connected to the multiple heat dissipation fins. A side box is installed on one side of the mechanism box. The side box facing the mechanism box is open. The vertical opening is set inside the side box. A linkage component for moving the sealing strip up and down is slidably installed inside the side box.

[0006] Through the integrated design of the mechanism box, base box, and side box, a basic load-bearing structure for retractable heat dissipation fins is created. The connecting port at the bottom of the mechanism box enables the conduction of internal heat to the base box. The heat conduction plate drives the heat dissipation fins to slide within the base box, allowing the heat dissipation fins to extend or retract into the base box as needed. This structurally changes the design of traditional fixed heat dissipation fins, eliminating the problem of long-term exposure and dust accumulation. The sealing strip is linked to the heat dissipation fins, and the side box provides installation and movement space for the linkage components, realizing automated extension and retraction control of the heat dissipation fins.

[0007] Specifically, the linkage includes a movable plate, which is slidably installed in the space formed by the side box and the mechanism box. The movable plate is in slidable contact with the inner wall of the side box. A first compression spring is installed at the middle position of the lower surface of the movable plate. Two linkage plates are installed on the lower surface of the movable plate. Two symmetrically arranged guide holes are opened at the bottom of the side box. The lower end of the linkage plate passes through the guide holes and is connected to the sealing strip. A thermal expansion mechanism for driving the linkage plate to move downward is installed on the side of the mechanism box near the vertical opening. The combined design of the linkage and thermal expansion mechanism enables temperature-sensing automatic control of the heat dissipation fins without manual intervention: the sliding cooperation between the movable plate and the side box provides a stable power transmission path for the extension and retraction of the heat dissipation fins, and the first compression spring can realize the automatic reset of the movable plate, allowing the heat dissipation fins to retract smoothly after the equipment cools down; the thermal expansion mechanism, as the core of temperature sensing, can sense the temperature change inside the mechanism box and convert it into mechanical power, driving the linkage plate to move the sealing strip and the heat dissipation fins downward and outward, realizing the linkage of automatic heat dissipation when the temperature rises. The pure mechanical transmission structure is suitable for harsh outdoor environments with high temperature, dust, and humidity, and is stable in operation and not prone to failure, improving the automation level and outdoor adaptability of the equipment.

[0008] Specifically, the thermal expansion mechanism includes a heat-absorbing cylinder, which is installed inside the mechanism housing near the vertical opening. The upper end of the heat-absorbing cylinder is closed, and a piston is slidably installed inside the heat-absorbing cylinder. Water is injected into the space above the piston inside the heat-absorbing cylinder. A connecting rod is installed at the center of the lower surface of the piston. The end of the connecting rod away from the piston extends to the outside of the heat-absorbing cylinder and passes through the corresponding vertical opening. The end of the connecting rod away from the piston is connected to a movable plate. The heat-absorbing cylinder is installed through a circular hole in the mechanism housing, allowing it to directly absorb heat from inside the mechanism housing, ensuring the accuracy and timeliness of temperature sensing, and ensuring that the thermal expansion mechanism can quickly respond to internal temperature changes.

[0009] Specifically, a circular hole is provided at the location where the heat-absorbing cylinder is installed in the mechanism box, and the upper end of the heat-absorbing cylinder passes through the circular hole and is installed inside the circular hole. The circular hole installation structure ensures a firm and close connection between the heat-absorbing cylinder and the mechanism box, with no excess gaps, thus ensuring the safe operation of the internal spring operating mechanism and transmission components.

[0010] Specifically, an upper limit sleeve and a lower limit sleeve are respectively fitted at both ends of the first compression spring. The upper limit sleeve is installed on the lower surface of the movable plate, and the lower limit sleeve is installed at the bottom of the side box. The upper limit sleeve and the lower limit sleeve at both ends of the first compression spring guide and limit the extension and retraction movement of the first compression spring, preventing the first compression spring from shifting, tilting, or getting stuck during long-term compression and reset, ensuring the stable output of the elastic force of the first compression spring, and ensuring that the movable plate can always move smoothly in the vertical direction, thereby allowing the extension and retraction of the heat dissipation fins to be smooth and stable.

[0011] Specifically, an insulating horizontal plate is provided on the upper side of the three-phase pole. Two support plates are installed on one side of the horizontal plate. The end of the support plate away from the horizontal plate is connected to a linkage plate. Three straight cylinders are installed on the lower surface of the horizontal plate. The upper end of the straight cylinder is closed. A blocking ring is installed at the lower end of the straight cylinder. A pressure rod is inserted in the blocking ring. The lower end of the pressure rod contacts the edge of the screw head used to limit the position of the wire, which is threaded to the upper end of the three-phase pole. A disc head is installed on the upper end of the pressure rod. The disc head is slidably installed in the straight cylinder. A second compression spring is provided on the upper side of the disc head. The second compression spring is vertically arranged in the upper part of the straight cylinder. The pressure rod, disc head, straight cylinder, and blocking ring are all components supported by insulating material. Multiple insulating isolation rings connected and fixed to the pressure rod are sleeved on the pressure rod. It achieves dual protection for the three-phase terminal block, combining anti-loosening and fault warning functions: Under the elastic force of the second compression spring, the pressure rod always presses the fixing screw of the terminal block tightly, resisting the risk of screw loosening caused by outdoor wind, vibration, and temperature changes, avoiding poor wiring contact, overheating, or wire detachment, and ensuring the conductivity stability and power supply safety of the three-phase terminal block; The horizontal plate and the linkage plate are linked. When the movable plate moves down, it drives the horizontal plate to move down synchronously, which increases the squeezing force of the pressure rod on the screw. If the screw head weakens due to rust or other reasons, the pressure rod will detach from the screw, visually reminding maintenance personnel to replace the screw in time, realizing early warning of faults and avoiding serious power supply accidents caused by minor faults; The cooperation of the straight cylinder, the blocking ring, and the disc head plays a guiding and limiting role in the movement of the pressure rod, ensuring that the pressure rod always presses the screw vertically, improving the anti-loosening effect.

[0012] Specifically, the horizontal plate has three vertical holes on its upper surface, and the straight cylinder passes through these holes and is fixedly connected to the horizontal plate. This fixed connection between the straight cylinder and the horizontal plate prevents the cylinder from loosening or shifting during equipment operation and vibration, ensuring the straight cylinder's guiding and limiting effect on the pressure rod remains effective and that the pressure rod can accurately and stably tighten the terminal screws.

[0013] Specifically, the two sides adjacent to the mechanism box and the side box are both open, and each of the two open sides of the mechanism box is equipped with a connecting seat. The connecting seat has an L-shaped structure, and two symmetrically arranged fixing holes are opened on the horizontal part of the connecting seat. The L-shaped connecting seat on the open side of the mechanism box simplifies the outdoor installation and fixing method of the equipment. The fixing holes on the horizontal part of the connecting seat can be directly connected to the brackets and hardware on the outdoor column by bolts. The installation operation is simple and adaptable to the needs of rapid on-site installation. At the same time, the connecting seat protects the open side of the mechanism box, reducing the entry of dust and moisture from the opening, thus meeting both the installation and protection requirements of the equipment.

[0014] The beneficial effects of this invention are: Water is injected into the heat-absorbing cylinder installed inside the mechanism box. When the internal temperature of the mechanism box rises, the water expands due to heat, pushing the piston downward. This movement drives the movable plate via a connecting rod, which in turn moves the heat-conducting plate, causing the heat dissipation fins to extend from the bottom box. This achieves automatic activation of the heat dissipation mode when the temperature rises, with timely and precise response, requiring no manual operation. When the internal temperature of the mechanism box drops, the water in the heat-absorbing cylinder contracts. The elasticity of the first compression spring causes the movable plate and the linkage plate to move upward, pulling the sealing strip and heat dissipation fins back into the bottom box, completing the automatic retraction. This achieves linkage between high-temperature extension and low-temperature retraction, adapting to the heat dissipation needs of different operating conditions of the equipment.

[0015] As the heat sink fins extend and retract from the base box, the edge of the strip-shaped opening of the base box will scrape the surface of the heat sink fins, which can automatically clean the small amount of dust attached to the surface of the heat sink fins without manual cleaning, keeping the surface of the heat sink fins clean and ensuring that the heat exchange efficiency between the heat sink fins and the outside air is always at its best.

[0016] The pressure bar on the upper side of the three-phase terminal block, under the elastic force of the second compression spring, always presses the fixing screw of the terminal block tightly, preventing the screw from loosening due to outdoor wind, vibration, and temperature changes. This avoids problems such as poor wiring contact and overheating, ensuring the conductivity stability of the three-phase terminal block and preventing power supply failures caused by wire detachment. As the movable plate moves downward, the horizontal plate also moves downward, increasing the squeezing force of the pressure bar on the screw. When the screw head weakens due to corrosion, the pressure bar will disengage from the screw when the horizontal plate moves downward, thus reminding maintenance personnel to replace the screw and perform other fault maintenance in a timely manner. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of an integrated pole-mounted circuit breaker according to the present invention; Figure 2 This is another perspective view of an integrated pole-mounted circuit breaker according to the present invention; Figure 3 This is an assembly diagram of the horizontal plate, side box, bottom box and mechanism box in a complete pole-mounted circuit breaker according to the present invention. Figure 4 This is a schematic diagram of the assembly of the horizontal plate, side box, bottom box and mechanism box in a complete pole-mounted circuit breaker according to the present invention. Figure 5 This is a cross-sectional assembly diagram of the horizontal plate, side box, bottom box and mechanism box in an integrated pole-mounted circuit breaker according to the present invention. Figure 6 This is an assembly diagram of the base box and mechanism box of a complete pole-mounted circuit breaker according to the present invention; Figure 7 This is an assembly diagram of a movable plate, a first compression spring, a heat-conducting plate, a horizontal plate, and a side box in a complete pole-mounted circuit breaker according to the present invention. In the picture: 100. Mechanism box; 101. Connecting seat; 102. Three-phase pole; 103. Connecting port; 104. Vertical opening; 200. Base box; 201. Sealing strip; 202. Heat-conducting plate; 2021. Heat dissipation fins; 203. Strip-shaped opening; 204. Notch; 300. Horizontal plate; 301. Support plate; 302. Straight cylinder; 3021. Blocking ring; 303. Pressure rod; 3031. Disc head; 304. Second compression spring; 400. Side box; 401. Linkage plate; 402. First compression spring; 403. Movable plate; 500. Heat absorption cylinder; 501. Moisture; 502. Piston; 503. Connecting rod. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-7The present invention provides a technical solution: a fusion-type pole-mounted circuit breaker, including a mechanism box 100, on the upper surface of the mechanism box 100, three equidistant three-phase poles 102 are installed; the two sides of the mechanism box 100 adjacent to the side box 400 are open, and a connecting seat 101 is installed on each of the two open sides of the mechanism box 100. The connecting seat 101 has an L-shaped structure, and two symmetrically arranged fixing holes are opened on the horizontal part of the connecting seat 101. The opening side of the mechanism box 100 is fitted with an L-shaped connecting seat 101, which simplifies the installation and fixing process of the equipment on the outdoor column. The pre-set fixing holes on the horizontal part can be directly connected to the outdoor bracket, hardware and other installation carriers by bolts, without the need for additional customized adapter accessories. The installation operation is simple and efficient and can meet the rapid assembly needs of the construction site. At the same time, the connecting seat 101 can effectively shield and protect the opening side of the mechanism box 100, reducing the intrusion of dust and moisture from the outdoor environment into the mechanism box 100. While meeting the equipment installation and fixing requirements, it further enhances the sealing and protection performance of the mechanism box 100 and ensures the operational stability of the internal components.

[0020] The bottom of the mechanism box 100 has multiple evenly spaced connecting openings 103. The bottom box 200 is installed at the bottom of the mechanism box 100, and the connecting openings 103 are located inside the bottom box 200, allowing communication between the internal space of the mechanism box 100 and the bottom box 200. The side of the mechanism box 100 has multiple evenly spaced vertical openings 104. The side box 400 is installed on one side of the mechanism box 100, and the side of the side box 400 facing the mechanism box 100 is open. The vertical openings 104 are located inside the side box 400, allowing communication between the mechanism box 100 and the side box 400.

[0021] The bottom of the base box 200 has multiple slots 203 evenly distributed at its bottom. A notch 204 is machined at the lower part of one side of the base box 200, and the slots 203 communicate with the notch 204. A heat-conducting plate 202 is slidably installed inside the base box 200. Multiple heat dissipation fins 2021 are evenly distributed on the lower surface of the heat-conducting plate 202, and the heat dissipation fins 2021 are inserted into the slots 203. A sealing strip 201 is provided in the notch 204, and the sealing strip 201 is connected to the multiple heat dissipation fins 2021. A movable plate 403 is slidably installed in the space formed by the side box 400 and the mechanism box 100, and the movable plate 403 slides in contact with the inner wall of the side box 400. A first compression spring 402 is installed at the middle of the lower surface of the movable plate 403. An upper limit sleeve and a lower limit sleeve are respectively fitted at both ends of the first compression spring 402. The upper limit sleeve is installed on the lower surface of the movable plate 403, and the lower limit sleeve is installed at the bottom of the side box 400.

[0022] The upper and lower ends of the first compression spring 402 are respectively fitted with upper limit sleeves and lower limit sleeves, which can guide and limit the extension and retraction movement of the first compression spring 402, so that the first compression spring 402 always performs linear extension and retraction movement in the vertical direction. This avoids problems such as displacement, skewness, bending or even jamming of the first compression spring 402 during long-term repeated compression and reset. At the same time, it can ensure that the elastic force of the first compression spring 402 is always uniform and stable, providing continuous and reliable power support for the reset of the movable plate 403. This ensures that the movable plate 403 can always move smoothly and vertically, driving the linkage plate 401, the sealing strip 201 and the heat conduction plate 202 to move synchronously and smoothly. In this way, the extension and retraction of the heat dissipation fins 2021 always remain smooth and stable, and there will be no jamming or displacement of the fins due to abnormal movement of the first compression spring 402. This ensures the long-term reliable operation of the entire heat dissipation extension and retraction mechanism.

[0023] Two linkage plates 401 are installed on the lower surface of the movable plate 403. Two symmetrically arranged guide holes are opened at the bottom of the side box 400. The lower end of the linkage plate 401 passes through the guide hole and is connected to the sealing strip 201. A heat absorption cylinder 500 is installed in the mechanism box 100 near the vertical opening 104. The upper end of the heat absorption cylinder 500 is closed. A round hole is opened at the position where the heat absorption cylinder 500 is installed in the mechanism box 100. The upper end of the heat absorption cylinder 500 passes through the round hole and is installed in the round hole. The heat absorption cylinder 500 is connected to the mechanism box 100 by a round hole through-mounting structure, so that the mating surfaces of the two are tightly fitted and firmly connected, with no excess gaps.

[0024] A piston 502 is slidably installed inside the heat absorption cylinder 500. Water 501 is injected into the space above the piston 502 inside the heat absorption cylinder 500. A connecting rod 503 is installed at the middle of the lower surface of the piston 502. The end of the connecting rod 503 away from the piston 502 extends to the outside of the heat absorption cylinder 500 and passes through the corresponding vertical opening 104. The end of the connecting rod 503 away from the piston 502 is connected to the movable plate 403. The heat-absorbing cylinder 500 inside the mechanism box 100 is pre-filled with water 501. This structure can accurately sense temperature changes inside the box. When the internal temperature of the mechanism box 100 rises, the water 501 in the heat-absorbing cylinder 500 expands due to heat, and the resulting thrust pushes the piston 502 downward. The piston 502 transmits the power to the movable plate 403 through the connecting rod 503, causing the movable plate 403 to move downward synchronously. This, in turn, pulls the heat-conducting plate 202 to slide within the base box 200, allowing the heat dissipation fins 2021 on the lower side of the heat-conducting plate 202 to extend smoothly from the slot 203 of the base box 200, thus activating the equipment's heat dissipation mode. The entire heat dissipation triggering process is a purely mechanical linkage reaction, requiring no manual intervention. The temperature sensing is accurate and the action response is timely, quickly adapting to the heat dissipation needs of the equipment during high-temperature operation. When the internal temperature of the mechanism box 100 decreases as the equipment operates, the moisture 501 in the heat absorption cylinder 500 contracts upon cooling, and the piston 502 loses its expansion thrust. At this time, the first compression spring 402 releases its elasticity, driving the movable plate 403 and the linkage plate 401 to return to their original position. This, in turn, pulls the sealing strip 201 and the heat dissipation fins 2021 to retract synchronously into the bottom box 200 for storage, thus realizing the linkage of the heat dissipation fins 2021 extending at high temperatures and retracting at low temperatures. The heat dissipation state can be flexibly adjusted according to different operating conditions of the equipment, making the heat dissipation operation more in line with the actual use needs of the equipment.

[0025] Meanwhile, as the heat dissipation fins 2021 reciprocate with the extension and retraction of the heat conduction plate 202 into the base box 200, the edge of the slot 203 of the base box 200 naturally scrapes against the fin surface, automatically peeling off and cleaning light debris such as dust and willow catkins adhering to the surface of the heat dissipation fins 2021. This eliminates the need for manual disassembly and cleaning, continuously maintaining the cleanliness of the heat dissipation fins 2021 surface. This self-cleaning design effectively prevents the accumulation of debris from obstructing heat exchange between the fins and the outside air, ensuring that the heat dissipation fins 2021 always achieve optimal heat conduction efficiency, keeping the heat dissipation effect of the mechanism box 100 stable, and ensuring that the internal spring operating mechanism and transmission components always operate in a suitable temperature environment.

[0026] An insulating horizontal plate 300 is provided on the upper side of the three-phase pole 102. Two support plates 301 are installed on one side of the horizontal plate 300, and the end of the support plate 301 away from the horizontal plate 300 is connected to the linkage plate 401. Three straight cylinders 302 are installed on the lower surface of the horizontal plate 300. The upper end of the straight cylinders 302 is closed. Three vertical holes are opened on the upper surface of the horizontal plate 300. The straight cylinders 302 pass through the vertical holes and are fixedly connected to the horizontal plate 302. A blocking ring 3021 is installed at the lower end of the straight cylinder 302. A pressure rod 303 is inserted into the blocking ring 3021. The lower end of the pressure rod 303 contacts the edge of the screw head used to limit the position of the wire, which is threaded to the upper end of the three-phase pole 102. A screw head is installed at the upper end of the pressure rod 303. The disc head 3031 is slidably installed inside the straight cylinder 302. A second compression spring 304 is provided on the upper side of the disc head 3031. The second compression spring 304 is vertically positioned in the upper part of the straight cylinder 302. The pressure rod 303, the disc head 3031, the straight cylinder 302, and the blocking ring 3021 are all components supported by insulating material. Multiple insulating isolation rings are sleeved on the pressure rod 303 and connected and fixed to it. The upper end of the three-phase pole 102 is equipped with the pressure rod 303 structure. Under the continuous elastic force of the second compression spring 304, the pressure rod 303 always maintains a downward pressing force, tightly pressing against the edge of the screw head of the terminal fixing wire, forming a continuous anti-loosening constraint. This design can withstand the risk of screw loosening caused by factors such as wind vibration and sudden changes in ambient temperature under complex outdoor working conditions. Structurally, it prevents problems such as poor wiring contact and localized overheating caused by loose screws, ensuring the conductivity stability of the three-phase pole 102. At the same time, it prevents power outages and short circuits caused by wires falling off due to fixing failure, thus building a solid safety line for outdoor power distribution wiring.

[0027] The pressure rod 303 is linked to the linkage plate 401. When the internal temperature of the mechanism box 100 rises, the movable plate 403 drives the linkage plate 401 to move downward, which in turn pulls the horizontal plate 300 downward, further increasing the squeezing force of the pressure rod 303 on the screw. If the screw head becomes rusted or worn due to long-term outdoor use, resulting in a decrease in structural strength and inability to withstand the increased squeezing force, the pressure rod 303 will detach from the screw head. This obvious structural change can visually warn maintenance personnel of a fault, promptly reminding them to replace and maintain the rusted and damaged screws, preventing small faults from gradually developing into serious power supply safety hazards, enabling early identification and timely handling of wiring component faults, and improving the timeliness and effectiveness of equipment operation and maintenance.

[0028] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A complete set of pole-mounted circuit breakers, characterized in that, include: The mechanism box (100) has three equidistant three-phase poles (102) installed on its upper surface. The bottom of the mechanism box (100) is evenly provided with multiple connecting ports (103), and one side of the mechanism box (100) is evenly provided with multiple vertical openings (104). A base box (200) is installed at the bottom of the mechanism box (100). The connecting port (103) is located inside the base box (200). Multiple strip-shaped openings (203) are evenly opened at the bottom of the base box (200). A notch (204) is machined at the lower part of one side of the base box (200). The strip-shaped openings (203) communicate with the notch (204). A heat-conducting plate (202) is slidably installed inside the base box (200). Multiple heat dissipation fins (2021) are evenly installed on the lower surface of the heat-conducting plate (202). The heat dissipation fins (2021) are inserted into the strip-shaped openings (203). A sealing strip (201) is provided in the notch (204). The sealing strip (201) is connected to the multiple heat dissipation fins (2021). A side box (400) is installed on one side of the mechanism box (100). The side box (400) facing the mechanism box (100) is open. The vertical opening (104) is set inside the side box (400). A linkage component for driving the sealing strip (201) to move up and down is slidably installed inside the side box (400).

2. The integrated pole-mounted circuit breaker according to claim 1, characterized in that, The linkage component includes a movable plate (403). The movable plate (403) is slidably installed in the space formed by the side box (400) and the mechanism box (100). The movable plate (403) is in sliding contact with the inner wall of the side box (400). A first compression spring (402) is installed at the middle position of the lower surface of the movable plate (403). Two linkage plates (401) are installed on the lower surface of the movable plate (403). Two symmetrically arranged guide holes are opened at the bottom of the side box (400). The lower end of the linkage plate (401) passes through the guide holes and is connected to the sealing strip (201). A thermal expansion mechanism for driving the linkage plate (401) to move downward is installed on the side of the mechanism box (100) near the vertical opening (104).

3. The integrated pole-mounted circuit breaker according to claim 2, characterized in that: The thermal expansion mechanism includes a heat absorption cylinder (500). The heat absorption cylinder (500) is installed in the mechanism box (100) on the side near the vertical opening (104). The upper end of the heat absorption cylinder (500) is closed. A piston (502) is slidably installed in the heat absorption cylinder (500). Water (501) is injected into the space above the piston (502) in the heat absorption cylinder (500). A connecting rod (503) is installed at the middle position of the lower surface of the piston (502). The end of the connecting rod (503) away from the piston (502) extends to the outside of the heat absorption cylinder (500) and passes through the corresponding vertical opening (104). The end of the connecting rod (503) away from the piston (502) is connected to the movable plate (403).

4. The integrated pole-mounted circuit breaker according to claim 3, characterized in that: A circular hole is provided at the position where the heat absorption cylinder (500) is installed in the mechanism box (100), and the upper end of the heat absorption cylinder (500) passes through the circular hole and is installed in the circular hole.

5. A combined pole-mounted circuit breaker according to claim 4, characterized in that: The first compression spring (402) has an upper limit sleeve and a lower limit sleeve respectively fitted at both ends. The upper limit sleeve is installed on the lower surface of the movable plate (403), and the lower limit sleeve is installed at the bottom of the side box (400).

6. A combined pole-mounted circuit breaker according to claim 5, characterized in that: An insulating horizontal plate (300) is provided on the upper side of the three-phase pole (102). Two support plates (301) are installed on one side of the horizontal plate (300). The end of the support plate (301) away from the horizontal plate (300) is connected to the linkage plate (401). Three straight cylinders (302) are installed on the lower surface of the horizontal plate (300). The upper end of the straight cylinder (302) is closed. A blocking ring (3021) is installed at the lower end of the straight cylinder (302). A pressure rod (303) is inserted in the blocking ring (3021). The lower end of the pressure rod (303) is threaded to the upper end of the three-phase pole (102) to limit the conduction. The screw head at the line position contacts the edge of the screw head. A disc head (3031) is installed on the upper end of the pressure rod (303). The disc head (3031) is slidably installed inside the straight cylinder (302). A second compression spring (304) is provided on the upper side of the disc head (3031). The second compression spring (304) is set vertically in the upper part of the straight cylinder (302). The pressure rod (303), disc head (3031), straight cylinder (302), and blocking ring (3021) are all components supported by insulating material. Multiple insulating isolation rings are sleeved on the pressure rod (303) and connected and fixed to the pressure rod (303).

7. A combined pole-mounted circuit breaker according to claim 6, characterized in that: The upper surface of the horizontal plate (300) has three vertical holes, and the straight cylinder (302) passes through the vertical holes and is connected and fixed to the horizontal plate (300).

8. A combined pole-mounted circuit breaker according to claim 1, characterized in that: The two sides of the mechanism box (100) and the side box (400) are open. A connecting seat (101) is installed on each of the two open sides of the mechanism box (100). The connecting seat (101) has an L-shaped structure and two symmetrically arranged fixing holes are opened on the horizontal part of the connecting seat (101).

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