A storage device for a molded case circuit breaker

Abstract

The application discloses a storage device for a middle-mounted circuit breaker, which comprises an airtight cabinet body for accommodating a circuit breaker body, a transfer trolley for moving the circuit breaker body, and a purifying assembly for purifying the gas in the airtight cabinet body; the limiting assembly comprises support seats fixed to the inner walls on both sides of the airtight cabinet body, and the opposite sides of the two support seats are integrally formed with outwardly protruding support tables for providing sliding support for the pulleys at the bottom of the circuit breaker body; sliding grooves are formed in the support seats along the mounting direction of the support seats, and limiting pieces are slidably arranged in the sliding grooves for providing limiting for the pulleys at the bottom of the circuit breaker body; the limiting pieces are fixed by being abutted against the groove bottoms of the sliding grooves through butterfly bolts; the transfer trolley can carry the circuit breaker body and push the circuit breaker body into the airtight cabinet body; the support tables provide sliding support for the pulleys at the bottom of the circuit breaker; and the limiting pieces can limit the displacement of the pulleys; and the purifying assembly is specially used for treating the harmful gas in the cabinet.

Description

Technical Field

[0001] This application relates to the technical field of circuit breaker storage, and in particular to a storage device for a center-mounted circuit breaker. Background Technology

[0002] As a core control and protection device in power systems such as distribution lines and substations, the medium-voltage circuit breaker has a precise structure and stringent electrical performance requirements. The storage conditions during transportation and idle periods directly affect the equipment's operational stability and service life. (See attached...) Figure 1 As shown, a centrally mounted circuit breaker and its cabinet typically include a circuit breaker body 1, a fixed frame 11 fixed on one side of the circuit breaker body 1, a positioning pin 12 that can be elastically ejected inside the fixed frame 11, and pulleys 13 for sliding on both sides of the bottom of the circuit breaker body 1.

[0003] The current storage methods for center-mounted circuit breakers during idle periods still have problems. First, the industry mostly uses the method of directly stacking center-mounted circuit breakers on the ground or shelves, and using plastic sleeves for the staggered contacts or conductive surfaces. There is a lack of targeted dedicated storage devices. Key metal components such as contacts, switches, and terminals on the circuit breaker are in direct contact with corrosive gases in the air. Furthermore, in solving the above technical problems, the inventors also found that most storage devices only support the circuit breaker body with a simple support structure, lacking precise limiting components for the pulleys at the bottom of the circuit breaker. This makes the circuit breaker prone to displacement due to vibration and collision during storage or transportation, and there is even a risk that the pulleys may slip off the support structure, reducing the safety of circuit breaker storage. Summary of the Invention

[0004] To ensure that the storage of data for the center-mounted circuit breaker can provide effective protection for a long period of time when it is idle, a storage device for the center-mounted circuit breaker is provided.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: A storage device for a center-mounted circuit breaker includes an airtight cabinet for housing the circuit breaker body, a transfer trolley for moving the circuit breaker body is provided on one side of the airtight cabinet, and further includes: A purification component is used to purify the gas inside the airtight cabinet; The limiting assembly includes support seats fixed to the inner walls of both sides of the airtight cabinet, and an integrally formed outwardly protruding support platform on one side of the two support seats. The support platform provides support for the pulley at the bottom of the circuit breaker body. A sliding groove is opened on the support seat along its own installation direction, and a limiting member is slidably provided in the sliding groove. The limiting member provides a limit for the pulley at the bottom of the circuit breaker body. The limiting member is fixed by abutting against the bottom of the sliding groove with a wing bolt.

[0006] By adopting the above technical solution, the circuit breaker body can be carried by a transfer trolley and pushed into the airtight cabinet. The support platform provides sliding support for the pulleys at the bottom of the circuit breaker. The sliding groove on the support base allows the limiting component to slide flexibly along the installation direction. The fixing point of the limiting component can be adjusted according to the actual position of the pulley, and the limiting component can limit the displacement of the pulley. The purification component is specifically designed to treat the gas inside the cabinet, which not only ensures the convenience of moving the circuit breaker, but also realizes the limiting of the pulley through the limiting component, while purifying the harmful gases inside the cabinet, effectively improving the reliability of circuit breaker storage.

[0007] Preferably, the limiting member includes a first limiting block and a second limiting block. The first limiting block is arranged perpendicularly to the support platform, and the second limiting block is arranged parallel to the support platform. A limiting space for limiting the pulley is formed between the first limiting block and the second limiting block.

[0008] By adopting the above technical solution, the limiting space formed by the first limiting block and the second limiting block is adapted to the shape and installation direction of the bottom pulley of the circuit breaker. The first limiting block can prevent the pulley from moving along the length direction of the support platform, and the second limiting block can prevent the pulley from moving perpendicular to the support platform. The constraint on the pulley is more comprehensive, ensuring that the pulley will not shift laterally or longitudinally during storage and transportation.

[0009] Preferably, the first limiting block has a guide groove along its own installation direction, and the second limiting block has a guide rod that slides and is limited in the guide groove on one side. A clamping spring is provided between the top wall of the guide groove and the guide rod to connect the two. When the second limiting block abuts against the pulley at the bottom of the circuit breaker body, the clamping spring is in a compressed state.

[0010] By adopting the above technical solution, when the pulley enters the limiting space and abuts against the second limiting block, the clamping spring is compressed and generates a reverse elastic force, so that the second limiting block always abuts against the pulley. This can not only adapt to pulleys of different diameters, but also absorb the impact force generated by vibration through the elastic buffer of the spring.

[0011] Preferably, an inclined guide plate is fixedly provided at the end of the second limiting block away from the guide slide rod, and the inclined surface of the guide plate faces the support platform.

[0012] By adopting the above technical solution, when the circuit breaker slides on the support platform via the pulley, the pulley will first contact the inclined surface of the guide plate and naturally guide along the inclined surface during the sliding process. The pulley can be guided into the limiting space between the first limiting block and the second limiting block without manual precise alignment, thus reducing the difficulty of the operation of the pulley entering the limiting space.

[0013] Preferably, the support base has a positioning hole along its installation direction perpendicular to itself, and the positioning hole is for the positioning pin on the circuit breaker body to be inserted.

[0014] By adopting the above technical solution, based on the limiting component limiting the pulley, the positioning pin can be inserted into the positioning hole to fix the circuit breaker from the direction perpendicular to the support base installation, forming a double constraint and preventing the circuit breaker from moving along the length of the support platform.

[0015] Preferably, each of the support bases has a plurality of positioning holes along its own mounting direction.

[0016] By adopting the above technical solution, the insertion position of the positioning pin on the circuit breaker can be flexibly selected according to the actual situation such as the length of the circuit breaker and the installation spacing of the pulleys, without having to replace the support base or storage device due to different circuit breaker specifications, thereby improving the compatibility range of the storage device with different specifications of center-mounted circuit breakers.

[0017] Preferably, the purification component includes a purification box and a fan. The purification box is provided with an adsorbent hanging bag rack for hooking the adsorbent. The two ends of the purification box are respectively opened with an air inlet and an air outlet that are connected to the airtight cabinet. The fan is aligned with the air inlet of the purification box, and the purification box is also provided with adsorbent cotton for adsorbing impurities at the air inlet.

[0018] By adopting the above technical solution, the fan in the purification component can drive the gas inside the cabinet to form a circulating airflow, guiding the gas into the purification box through the air inlet; the adsorption cotton at the air inlet first filters out solid impurities such as dust in the gas, preventing impurities from adhering to key components such as circuit breaker contacts and wiring terminals; the adsorbent hanging bag rack inside the purification box is used to fix the adsorbent. When the gas passes through the adsorbent, the water vapor and corrosive components (such as oxygen, chloride ions, sodium ions, hydrogen sulfide, etc.) are adsorbed and removed. The purified gas is discharged from the air outlet back into the cabinet, forming a complete purification cycle, achieving dual purification of the gas inside the cabinet by filtering solid impurities and adsorbing water vapor and corrosive components.

[0019] Preferably, the purification assembly further includes a heater for heating the gas, and the heater is aligned with the gas outlet of the purification box.

[0020] By adopting the above technical solution, the purified gas is heated when it passes through the heater. The relative humidity of the gas decreases after the temperature rises, which can further remove residual water vapor in the gas. At the same time, the warm gas will form natural convection in the cabinet, which will accelerate the gas circulation in the cabinet and make the purification effect of the purification components more comprehensive.

[0021] Preferably, the airtight cabinet is hinged with a cabinet door, and a number of guide seats are fixedly provided on the side of the airtight cabinet near the cabinet door, and the guide seats are for the guide pins on the transfer trolley to be inserted.

[0022] By adopting the above technical solution, the guide seat on the side of the airtight cabinet near the cabinet door cooperates with the guide pin on the transfer trolley. When the transfer trolley pushes the circuit breaker into the airtight cabinet, the guide pin inserts into the guide seat to guide the trolley to move in a fixed direction, ensuring that the bottom pulley of the circuit breaker on the trolley is accurately aligned with the support platform on both sides of the airtight cabinet, and preventing the pulley from deviating from the support platform.

[0023] Preferably, the airtight cabinet is hinged to a cabinet door, and a lock hook seat is fixedly provided on the side of the airtight cabinet near the cabinet door, and a lock hook groove is opened on the lock hook seat, the lock hook groove being used for locking and unlocking the lock hook on the transfer trolley.

[0024] By adopting the above technical solution, the cooperation between the lock hook seat and the lock hook can form a constraint, and the lock hook and the lock hook groove can complete the rigid locking of the transfer trolley and the airtight cabinet, so as to prevent the transfer trolley from deviating or shaking along the guide direction or perpendicular guide direction during the process of pushing the circuit breaker, and ensure the docking accuracy of the transfer trolley and the airtight cabinet.

[0025] In summary, this application has at least the following beneficial effects: 1. The circuit breaker body can be carried and pushed into the airtight cabinet by the transfer trolley. The support platform provides sliding support for the pulleys at the bottom of the circuit breaker. The purification component is specially designed to treat the gas inside the cabinet. The circuit breaker is restricted from displacement from different directions by the triple limiting structure of the support platform, the lateral and longitudinal constraints of the limiting components, and the matching of the positioning pin and the positioning hole, thereby improving the structural stability of the circuit breaker in the airtight cabinet. 2. Through the cooperation of the sliding groove and the limiting component, the limiting point can be flexibly adjusted according to the position of the circuit breaker pulley; the elastic telescopic structure of the limiting component can be compatible with pulleys of different diameters; the several positioning holes on the support can be adapted to the positioning pin installation requirements of circuit breakers of different lengths and specifications, eliminating the need to design a separate storage structure for a single model of circuit breaker, thus greatly improving the versatility of the device.

[0026] 3. The airtight cabinet, together with the internal purification components, ensures a clean and stable qualified environment for the long-term storage of circuit breakers, effectively preventing the negative impact of conventional storage on circuit breakers. Attached Figure Description Figure 1 A three-dimensional structural diagram of a conventional center-mounted circuit breaker; Figure 2 A schematic diagram of the state during the storage process of the circuit breaker body. Figure 1 ; Figure 3A schematic diagram of the state during the storage process of the circuit breaker body. Figure 2 ; Figure 4 This is a structural schematic diagram of an airtight cabinet; Figure 5 A three-dimensional structural diagram of the support base, support platform and limiting component; Figure 6 This is a sectional view of the support base, support platform, and limiting component; Figure 7 This is a cross-sectional view of the purification component.

[0027] Reference numerals in the attached drawings: 1. Circuit breaker body; 11. Fixed frame; 12. Positioning pin; 13. Pulley; 2. Airtight cabinet; 21. Cabinet door; 22. Guide seat; 221. Guide hole; 23. Locking hook seat; 231. Locking hook groove; 3. Transfer trolley; 31. Cart frame; 32. Guide pin; 33. Locking hook; 4. Support seat; 41. Support platform; 42. Sliding groove; 43. Positioning hole; 5. Limiting component; 51. First limiting block; 511. Guide slide groove; 52. Second limiting block; 521. Guide slide rod; 53. Sliding block; 54. Wing bolt; 55. Clamping spring; 56. Guide plate; 6. Purification component; 61. Purification box; 611. Air inlet; 612. Air outlet; 62. Adsorbent bag rack; 63. Adsorbent cotton; 64. Fan; 65. Heater. Detailed Implementation The following section provides a more detailed description, in conjunction with the accompanying diagrams: As attached Figure 2 and attached Figure 3 As shown, a storage device for a center-mounted circuit breaker includes an airtight cabinet 2 for storing the center-mounted circuit breaker. The airtight cabinet 2 is made of steel plate and is fully welded. The internal volume of the airtight cabinet 2 is designed according to the size of common center-mounted circuit breakers to ensure that the circuit breaker can be fully accommodated. An opening is provided on one side of the airtight cabinet 2 for the circuit breaker to enter and exit. The side of the airtight cabinet 2 away from the opening is a closed structure. A cabinet door 21 is provided on the front side of the airtight cabinet 2 by hinges. The size of the cabinet door 21 is adapted to the opening of the airtight cabinet 2. After the cabinet door 21 is closed, it can be fixed to the airtight cabinet 2 by buckles to achieve the sealing of the inside of the airtight cabinet 2.

[0028] A transfer trolley 3 is provided on one side of the opening of the airtight cabinet 2. The transfer trolley 3 includes a frame 31 and four rollers installed at the bottom of the frame 31 to facilitate the movement and fixation of the trolley. The top surface of the frame 31 is flat, and its length and width are adapted to the bottom dimensions of the circuit breaker, so as to stably support the circuit breaker. Two guide pins 32 are symmetrically fixed at one end of the moving frame 31 near the airtight cabinet 2. The guide pins 32 are cylindrical metal rods with chamfered tips.

[0029] On the outer wall of the airtight cabinet 2 near the cabinet door 21, corresponding to the position of the guide pin 32 on the transfer trolley 3, two guide seats 22 are fixed by bolts. The guide seats 22 are angle iron-shaped structures with cylindrical guide holes 221. The diameter of the guide holes 221 is slightly larger than the diameter of the guide pin 32, and the axis of the guide holes 221 is consistent with the moving direction of the transfer trolley 3. This ensures that when the transfer trolley 3 pushes the circuit breaker, the guide pin 32 can be smoothly inserted into the guide hole 221 to achieve the guiding and positioning of the trolley.

[0030] On the outer wall of the airtight cabinet 2 near the cabinet door 21, corresponding to the position of the locking hook 33 on the transfer trolley 3, a locking hook seat 23 is fixed by bolts and located in the center between the two guide seats 22. There is one locking hook seat 23 and one locking hook 33. The specific number can be increased according to actual needs. The locking hook seat 23 also has a locking hook groove 231 along the sliding direction of the transfer trolley 3. The opening cross section of the locking hook groove 231 is rectangular. The locking hook groove 231 can be used to lock and unlock the locking hook 33 on the transfer trolley 3. The tail of the locking hook 33 extends out of the outer side of the frame 31 and is welded with a lever for easy manual operation. Under normal conditions, the end of the locking hook 33 is inserted into the locking hook groove 231 without forming a latch. When the locking hook 33 moves to both sides, the locking hook 33 can hook into the locking hook groove 231 and form a latch, realizing the locking state of the transfer trolley 3 and the airtight cabinet 2.

[0031] As attached Figure 4 and attached Figure 5 As shown, two sets of support seats 4 are fixedly installed on two opposite side walls inside the airtight cabinet 2. The bottom of the airtight cabinet 2 has two chambers for placing the center-mounted circuit breaker. Therefore, the two sets of support seats 4 are located at the bottom of the two chambers respectively. Each set of support seats 4 consists of two relatively parallel support seats 4. The support seats 4 are rectangular stainless steel components. The installation direction of the support seats 4 is consistent with the depth direction of the airtight cabinet 2. The installation direction of the support seats 4 is consistent with the direction in which the circuit breaker enters and exits the airtight cabinet 2. On the opposite side of the two support seats 4 in the same set, there is an outwardly protruding support platform 41. The support platform 41 can be supported and slid by the pulleys on both sides of the bottom of the circuit breaker.

[0032] Each support base 4 has a sliding groove 42 along its own installation direction. The sliding groove 42 is located above the support platform 41. The sliding groove 42 is a rectangular groove that runs through the side of the support base 4. The length of the sliding groove 42 is designed according to the depth of the airtight cabinet 2 and the spacing of the circuit breaker pulleys, with sufficient adjustment stroke reserved. Each support base 4 has a limiting member 5 slidably installed in the sliding groove 42. The two limiting members 5 on the same group of support bases 4 correspond to the two pulleys at the bottom of the circuit breaker.

[0033] As attached Figure 5 and attached Figure 6As shown, the limiting member 5 includes a first limiting block 51 and a second limiting block 52. The first limiting block 51 is arranged perpendicularly to the support platform 41. A sliding block 53 is integrally formed on the side of the first limiting block 51 that abuts against the support base 4. The sliding block 53 slides and is limited in the sliding groove 42. A wing bolt 54 is threaded on the first limiting block 51 along the installation direction perpendicular to the support base 4. The screw of the wing bolt 54 passes through the sliding block 53 and extends to the bottom of the sliding groove 42. When the wing bolt 54 is tightened, the screw abuts against the bottom of the groove to generate friction, thereby fixing the limiting member 5 in the sliding groove 42.

[0034] The top of the first limiting block 51 has a guide groove 511 along its own installation direction. The guide groove 511 is a rectangular groove, and the opening of the guide groove 511 faces the second limiting block 52. The second limiting block 52 is a cuboid block arranged parallel to the support platform 41 and is located above the first limiting block 51. A vertically downward guide rod 521 is integrally formed at one end of the second limiting block 52 near the first limiting block 51. The installation direction of the guide rod 521 is the same as that of the first limiting block 51, and the diameter of the guide rod 521 matches the width of the guide groove 511. The guide slide rod 521 slides and is confined within the guide groove 511. A clamping spring 55 is connected between the top wall of the guide groove 511 and the top of the guide slide rod 521. The clamping spring 55 is in an extended state in its natural state, pushing the second limiting block 52 to move towards the support platform 41, so that an initial limiting space is formed between the first limiting block 51 and the second limiting block 52. When the circuit breaker pulley abuts against the second limiting block 52, it will push the guide slide rod 521 to slide upward along the guide groove 511, compressing the clamping spring 55, and using the elastic force of the spring to achieve elastic clamping of the pulley.

[0035] The end of the second limiting block 52 away from the guide slide rod 521 is fixed with an inclined guide plate 56 by welding. The guide plate 56 is made of metal, and its inclined surface faces the top surface of the support platform 41 to ensure that the pulley can accurately contact the inclined surface of the guide plate 56 when it slides.

[0036] The support base 4 has a through positioning hole 43 perpendicular to its own installation direction. The positioning hole 43 is a square hole with a diameter that matches the elastic positioning pin on the circuit breaker, ensuring that the positioning pin can be inserted elastically. Furthermore, each support base 4 has two positioning holes 43 evenly distributed along its own installation direction, with a certain interval between adjacent positioning holes 43. Circuit breakers of different lengths can have their positions of the limiting member 5 adjusted by the wing bolt 54, and the corresponding positioning hole 43 can be selected for the positioning pin to be inserted, ensuring that the storage device can accommodate the storage of circuit breakers of different lengths.

[0037] As attached Figure 4 and attached Figure 7As shown, the airtight cabinet 2 is also equipped with a purification component 6. There are four sets of purification components 6 in total. Two sets are symmetrically installed on the inner wall of the top of the airtight cabinet 2, and two sets are symmetrically installed on the side wall of the bottom of the airtight cabinet 2. Each set of purification components 6 corresponds to a different area inside the airtight cabinet 2, ensuring that the gas inside the cabinet can be completely purified and avoiding purification dead zones.

[0038] The purification component 6 includes a purification box 61, which is a rectangular metal box fixed to the inner wall of the airtight cabinet 2 by bolts. The purification box 61 has an air inlet 611 and an air outlet 612 at its two ends, respectively, which communicate with the inside of the airtight cabinet 2. The purification box 61 also has an adsorbent bag holder 62 for hanging the adsorbent. The adsorbent bag holder 62 is a metal frame structure, welded and fixed inside the purification box 61, located between the air inlet 611 and the air outlet 612. The adsorbent bag holder 62 has one hook evenly distributed on it for hanging bags containing adsorbent. The selection of the adsorbent is determined by the harmful gas elements contained in the circuit breaker storage environment. It can effectively adsorb corrosive components such as oxygen, water vapor, hydrogen sulfide, nitrogen oxides, chloride ions, and sodium ions in the gas inside the airtight cabinet 2. The number of adsorbent bags matches the number of hooks, and gaps are left between the bags to ensure that the gas can fully pass through the adsorbent, improving the adsorption effect.

[0039] An absorbent cotton 63 is fixed inside the air inlet 611 of the purification box 61. The absorbent cotton 63 can filter out solid impurities such as dust and particulate matter in the gas. A heater 65 is fixed outside the air outlet 612 of the purification box 61. The heater 65 is a small electric heater. After the purified gas is discharged from the air outlet 612, it is heated by the heating surface of the heater 65, which makes it easy to form air convection efficiency. At the same time, it can also ensure the cabinet heating when the storage temperature is too low.

[0040] A fan 64 is fixedly installed on the outside of the air inlet 611 of the purification box 61. The air outlet of the fan 64 is aligned with the air inlet 611 of the purification box 61 to ensure that the airflow can smoothly enter the purification box 61. When the fan 64 is working, it can drive the gas in the cabinet to form a circulating airflow, guide the gas from the air inlet 611 into the purification box 61, and after being purified by the adsorption cotton 63 and adsorbent, it is discharged from the air outlet 612 back into the cabinet, forming a complete gas purification cycle.

[0041] A microswitch can be installed inside the airtight cabinet 2. This microswitch is electrically connected to the fan 64 and the heater 65. When the cabinet door 21 is completely closed, the inner edge of the cabinet door 21 will press the trigger button of the microswitch, so that the microswitch is in the closed state. When the cabinet door 21 is opened, the trigger button is reset by its own spring, and the microswitch is in the open state. Through the linkage between the cabinet door 21 and the microswitch, the start and stop control of the fan 64 and the heater 65 can be realized, ensuring that the purification component 6 only works when the airtight cabinet 2 is sealed.

[0042] The implementation principle of this embodiment: When it is necessary to store the circuit breaker, open the cabinet door 21, push the transfer trolley 3 to the opening of the airtight cabinet 2, align the guide pin 32 on the trolley with the guide seat 22 on the airtight cabinet 2, and slowly push the trolley so that the guide pin 32 is inserted into the guide hole 221, achieving precise docking between the trolley and the airtight cabinet 2; at this time, the locking hook 33 on the transfer trolley 3 cooperates with the locking hook groove 231 on the locking hook seat 23 on the cabinet 2 to lock the trolley 3 firmly onto the airtight cabinet 2; then push the circuit breaker to move into the airtight cabinet 2, and the pulley at the bottom of the circuit breaker slides along the top surface of the support platform 41; When the pulley contacts the guide plate 56 on the second limiting block 52, it will naturally guide along the inclined surface of the guide plate 56, pushing the second limiting block 52 to move away from the support platform 41, compressing the clamping spring 55. As the trolley is pushed forward, the pulley completely enters the limiting space between the first limiting block 51 and the second limiting block 52. The clamping spring 55 rebounds, pushing the second limiting block 52 to press tightly against the side of the pulley, thus achieving the initial limiting of the pulley. Then, the elastic positioning pin on the control circuit breaker pops out under the action of the spring and inserts into the corresponding positioning hole 43 on the support base 4 to form a double fixation. After the cabinet door 21 is closed, the control switch automatically starts the fan 64 and the heater 65. The gas inside the cabinet flows in through the air inlet 611 of the purification box 61 under the drive of the fan 64. The absorbent cotton 63 filters out large particulate impurities and absorbs corrosive components such as oxygen, water vapor, hydrogen sulfide, nitrogen oxides, chloride ions, and sodium ions in the gas inside the airtight cabinet 2. After being heated by the heater 65, the purified gas flows back into the airtight cabinet 2 from the air outlet 612 to form a circulation purification, keeping the environment inside the cabinet dry and clean.

[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A storage device for a centrally mounted circuit breaker, comprising an airtight cabinet (2) for housing the circuit breaker body (1), characterized in that, The airtight cabinet (2) is provided with a transfer trolley (3) for moving the circuit breaker body (1) on one side, and also includes: Purification component (6) is used to purify the gas inside the airtight cabinet (2); The limiting component includes a support base (4) fixed on the inner walls of both sides of the airtight cabinet (2), and an integrally formed outwardly protruding support platform (41) on the opposite side of the two support bases (4). The support platform (41) provides support for the pulley (13) at the bottom of the circuit breaker body (1). The support base (4) has a sliding groove (42) along its own installation direction, and a limiting member (5) is slidably provided in the sliding groove (42). The limiting member (5) provides a limit for the pulley (13) at the bottom of the circuit breaker body (1). The limiting member (5) is fixed by a butterfly bolt (54) against the bottom of the sliding groove (42).

2. The storage device for a centrally located circuit breaker according to claim 1, characterized in that, The limiting member (5) includes a first limiting block (51) and a second limiting block (52). The first limiting block (51) is perpendicular to the support platform (41), and the second limiting block (52) is parallel to the support platform (41). A limiting space for limiting the pulley (13) is formed between the first limiting block (51) and the second limiting block (52).

3. A storage device for a centrally located circuit breaker according to claim 2, characterized in that, The first limiting block (51) has a guide groove (511) along its own installation direction. The second limiting block (52) has a guide rod (521) on one side that slides and is limited in the guide groove (511). A clamping spring (55) is provided between the groove wall at the top of the guide groove (511) and the guide rod (521). When the second limiting block (52) abuts against the pulley (13) at the bottom of the circuit breaker body (1), the clamping spring (55) is in a compressed state.

4. A storage device for a centrally located circuit breaker according to claim 3, characterized in that, The second limiting block (52) has an inclined guide plate (56) fixed at one end away from the guide slide rod (521), and the inclined surface of the guide plate (56) faces the support platform (41).

5. A storage device for a centrally located circuit breaker according to claim 1, characterized in that, The support base (4) has a positioning hole (43) along its installation direction perpendicular to itself, and the positioning hole (43) is for the positioning pin (12) on the circuit breaker body (1) to be inserted.

6. A storage device for a centrally located circuit breaker according to claim 5, characterized in that, Each of the support bases (4) has several positioning holes (43) along its own installation direction.

7. A storage device for a centrally located circuit breaker according to claim 1, characterized in that, The purification component (6) includes a purification box (61) and a fan (64). The purification box (61) is provided with an adsorbent hanging bag rack (62) for hooking the adsorbent. The two ends of the purification box (61) are respectively opened with an air inlet (611) and an air outlet (612) that are connected to the airtight cabinet (2). The fan (64) is aligned with the air inlet (611) of the purification box (61), and the purification box (61) is also provided with adsorbent cotton (63) for adsorbing impurities at the air inlet (611).

8. A storage device for a centrally located circuit breaker according to claim 7, characterized in that, The purification component (6) further includes a heater (65) for heating the gas, and the heater (65) is aligned with the gas outlet (612) of the purification box (61).

9. A storage device for a centrally located circuit breaker according to claim 1, characterized in that, The airtight cabinet (2) is hinged with a cabinet door (21). Several guide seats (22) are fixedly provided on the side of the airtight cabinet (2) near the cabinet door (21), and the guide seats (22) are for the guide pins (32) on the transfer trolley (3) to be inserted.

10. A storage device for a centrally located circuit breaker according to claim 1, characterized in that, The airtight cabinet (2) is hinged with a cabinet door (21). A lock hook seat (23) is fixedly provided on the side of the airtight cabinet (2) near the cabinet door (21), and a lock hook groove (231) is opened on the lock hook seat (23). The lock hook groove (231) is used for locking and unlocking the lock hook (33) on the transfer cart (3).

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