A primary and secondary fusion column circuit breaker with a protective isolating switch

Abstract

This application relates to the field of power equipment technology, and in particular to a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch, comprising a primary equipment body and an operating mechanism. The primary equipment body includes a mechanism box, a mounting frame fixedly installed on the back of the mechanism box, an isolating blade, an insulating pull rod disposed on the surface of the mounting frame, and a closing / opening handle disposed on the front of the mechanism box. The primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch described in this application, by setting an isolating blade operating component, when it is necessary to disconnect the isolating blade, rotating the worm gear drives the worm wheel to rotate. The worm wheel and worm gear mesh, thereby driving the internal threaded sleeve to rotate. After the internal threaded sleeve rotates, it drives the threaded column and the first spur gear to approach the first spur gear. The first spur gear meshes with the first spur rack, thereby driving the support column to rotate, and thus driving the isolating blade to disconnect.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch. Background Technology

[0002] The integrated pole-mounted circuit breaker is a new type of power equipment that deeply integrates primary equipment (such as the pole-mounted circuit breaker) with secondary equipment (such as the FTU feeder terminal). It aims to improve the intelligence level and operational efficiency of the power grid. Its core feature is reducing the connection links between traditional equipment through integrated design, lowering the failure rate, and enabling advanced functions such as remote monitoring and fault diagnosis. The integrated pole-mounted vacuum circuit breaker uses a vacuum arc-extinguishing chamber for arc extinguishing and a disconnecting switch to connect and disconnect the conductive knife switch. However, the disconnecting switch itself cannot extinguish the arc; therefore, special care must be taken when connecting and disconnecting the disconnecting switch.

[0003] In existing technology, before disconnecting the isolating switch (i.e., the main switch) for maintenance, the arc-extinguishing chamber (i.e., the main circuit) must first be opened using the opening / closing handle on the mechanism box, and then the isolating switch must be disconnected. This sequence ensures that the main circuit is already in the open state when the isolating switch is operated, thus avoiding the dangerous operation of opening the switch under load and ensuring personnel safety. When power needs to be restored after maintenance, the operation sequence is reversed: the isolating switch must be connected first, and then the arc-extinguishing chamber must be closed using the opening / closing handle on the mechanism box. This sequence ensures that the isolating switch is already in the closed position before the main circuit is closed, preparing for power restoration. Currently, these safety regulations generally rely on the human judgment of experienced maintenance engineers. When maintenance personnel are inexperienced, operate improperly, or mistakenly close the switch, safety accidents are highly likely to occur.

[0004] Therefore, this application provides a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch. Summary of the Invention

[0005] The purpose of this application is to solve at least one technical problem raised in the background art.

[0006] This application provides a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch, including a primary equipment body and an operating mechanism. The primary equipment body includes a mechanism box, a fixed pole, a placement frame fixedly installed on the back of the mechanism box, an isolating blade and an insulating pull rod disposed on the surface of the placement frame, and a closing / opening handle disposed on the front of the mechanism box. The insulating pull rod consists of a support column rotatably installed on the inner wall of the placement frame, an inclined support fixedly installed on the surface of the support column, and a pull rod hinged to the inclined support. The other end of the pull rod is hinged to the surface of the isolating blade. The operating mechanism consists of a protective cover fixedly installed on the front of the mechanism box, and closing / opening operating components and an isolating blade operating component respectively disposed on the inner wall of the protective cover.

[0007] By adopting the above technical solution, the solid-sealed pole is an integrated design that integrates components such as vacuum interrupter, current transformer, and voltage sensor. The opening and closing handle 105 is used to control the opening and closing of the interrupter. When the isolating switch is in the closed state, rotating the opening and closing handle can drive the interrupter to open. After that, the drive support column will rotate, which will drive the inclined support to rotate synchronously. After the inclined support rotates, it can drive the pull rod to rise, thereby driving the isolating switch to disconnect.

[0008] Preferably, the isolation knife operating component includes an internally threaded sleeve rotatably mounted on the front of the mechanism box, a through hole opened in the inner wall of the mechanism box, a threaded post that is helically driven on the inner wall of the internally threaded sleeve, a first spur gear fixedly mounted on the surface of the support post, a first spur rack fixedly mounted on the back of the threaded post, a driving component disposed inside the protective cover, and a guiding component disposed inside the placement frame for guiding the first spur rack, wherein the first spur gear and the first spur rack mesh and drive each other.

[0009] By adopting the above technical solution, when the internal threaded sleeve rotates, the internal threaded sleeve and the threaded column can be driven to move by the helical transmission between the internal threaded sleeve and the threaded column, thereby driving the first straight rack to approach the first straight gear. By using the meshing transmission between the first straight rack and the first straight gear, the support column can be driven to rotate.

[0010] Preferably, the driving component includes a worm gear rotatably mounted on the inner wall of the protective cover, a worm wheel fixedly mounted on the outer surface of the internal threaded sleeve, and a through hole formed in the bottom wall of the protective cover.

[0011] Preferably, one end of the worm passes through a through hole and is fixedly mounted with a connecting ring, and the worm wheel meshes with the worm for transmission.

[0012] By adopting the above technical solution, the rotating connecting ring can drive the worm to rotate, and the worm wheel meshes with the worm to drive the internal threaded sleeve to rotate.

[0013] Preferably, the guiding component includes guide rods symmetrically fixedly installed on the inner wall of the placement frame, and guide sleeves fixedly installed on both sides of the first straight rack, with the guide sleeves and guide rods slidingly engaged.

[0014] By adopting the above technical solution, when the internal threaded sleeve and the threaded column are in helical transmission, the guide sleeve will slide on the surface of the guide rod, thereby guiding the first straight rack and preventing the threaded column from rotating.

[0015] Preferably, the opening and closing operation component includes a second spur gear fixedly installed on the outer surface of the internal threaded sleeve, a guide frame fixedly installed on the front of the mechanism box, a second spur rack slidably fitted on the inner wall of the guide frame, a push rod fixedly installed on the upper surface of the second spur rack, and a stop bar fixedly installed on the surface of the opening and closing handle.

[0016] Preferably, the second spur rack meshes with the second spur gear, and the stop lever and the push rod are arranged to overlap each other.

[0017] By adopting the above technical solution, when the internal threaded sleeve rotates, it can drive the second spur gear to rotate. The second spur gear meshes with the second spur rack, thereby driving the push rod to approach the stop lever and push the stop lever to rotate. When the stop lever rotates, it can drive the opening and closing handle to rotate synchronously.

[0018] Preferably, a limiting mechanism is provided on the back of the mechanism box. The limiting mechanism includes a protective sleeve fixedly installed on the back of the mechanism box, the back of the opening and closing handle extends into the interior of the protective sleeve and is fixedly installed with a protrusion, and the inner wall of the protective sleeve is provided with a limiting groove for the protrusion to move.

[0019] By adopting the above technical solution, when the opening and closing handle is turned, the protrusion block can be driven to rotate synchronously. When the protrusion block rotates, it can drive the protrusion block to rotate along the inner wall of the limit groove.

[0020] Preferably, the inner wall of the limiting groove is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is slidably fitted with an arc-shaped rod, the two ends of the arc-shaped rod are fixedly installed with contact plates, and the surface of the arc-shaped rod is sleeved with a return spring.

[0021] Preferably, the two ends of the reset spring abut against the two inner sidewalls of the arc-shaped groove, and the contact plate is made of iron block and the protrusion is made of magnet.

[0022] By adopting the above technical solution, when the protruding block rotates to open the arc-extinguishing chamber, the protruding block will rotate to contact the contact plate and be attracted to the contact plate. At the same time, the reset spring will contract to store force. When the push rod continues to move and disengages from the stop lever, the reset spring will reset and drive the stop lever to rotate in the opposite direction. When the push rod moves in the opposite direction, it can continue to push the stop lever to drive the opening and closing handle to rotate in the opposite direction, at which time the arc-extinguishing chamber can be closed.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The primary and secondary integrated pole-mounted circuit breaker with protective disconnecting switch described in this application, by setting up an isolating knife operating component, when it is necessary to disconnect the isolating knife, rotating the worm gear can drive the worm wheel to rotate. The worm wheel and worm gear mesh and drive, thereby driving the internal threaded sleeve to rotate. After the internal threaded sleeve rotates, it can drive the threaded column and the first straight gear to approach the first straight gear. The first straight gear meshes and drives the first straight rack, thereby driving the support column to rotate, and then driving the isolating knife to disconnect the connection.

[0025] 2. The primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch described in this application, by setting up opening and closing operation components, when it is necessary to disconnect the disconnecting switch, rotating the worm gear drives the internal threaded sleeve to rotate. At this time, the second spur gear will rotate synchronously. The second spur gear and the second spur rack mesh and drive the push rod to approach the stop rod and push the stop rod to rotate. When the stop rod rotates, it can drive the opening and closing handle to rotate synchronously, thereby opening the arc-extinguishing chamber. Afterwards, continuing to rotate the worm gear can drive the first spur rack to mesh and drive the first spur gear to disconnect the disconnecting switch. Conversely, when the disconnecting switch is closed, rotating the worm gear counterclockwise will cause the first spur rack to move and drive the disconnecting switch to close first. Afterwards, continuing to rotate the worm gear can drive the push rod to move in the opposite direction, which can drive the stop rod to drive the opening and closing handle to rotate in the opposite direction, thereby closing the arc-extinguishing chamber. This design only requires rotating the worm gear to complete the opening and closing of the main equipment body and conforms to the operation specifications of the disconnection sequence of the disconnecting switch and the arc-extinguishing chamber.

[0026] 3. The primary and secondary integrated pole-mounted circuit breaker with protective disconnecting switch described in this application, by setting a limit mechanism, can drive the protruding block to rotate synchronously when the opening and closing handle is turned. When the protruding block rotates, it can drive the protruding block to rotate along the inner wall of the limit groove and be attracted to the contact plate. At the same time, the return spring will contract to store force. When the push rod continues to move and disengages from the stop rod, the return spring will reset and drive the stop rod to rotate in the opposite direction so that the push rod can continue to contact the stop rod when it moves in the opposite direction. Attached Figure Description

[0027] Figure 1 This is a three-dimensional first-view structural diagram of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the three-dimensional second-view structure according to an embodiment of this application;

[0029] Figure 3 This is a side sectional view of an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the front section structure of the protective cover according to an embodiment of this application;

[0031] Figure 5 This is a three-dimensional structural diagram of the guide component according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the orthographic structure of the limiting mechanism according to an embodiment of this application;

[0033] Figure 7 yes Figure 3 Enlarged structural diagram at point A in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Primary equipment body; 101. Mechanism box; 102. Placement rack; 103. Isolation knife; 104. Pull rod; 105. Opening and closing handle; 106. Support column; 107. Diagonal brace; 108. Protective cover;

[0036] 200. Opening and closing operating components; 201. Second spur gear; 202. Guide frame; 203. Second spur rack; 204. Push rod; 205. Stop lever;

[0037] 300. Isolation knife operating component; 301. Internal threaded sleeve; 302. Threaded post; 303. First spur gear; 304. First spur rack;

[0038] 400. Drive component; 401. Worm gear; 402. Worm wheel; 403. Connecting ring;

[0039] 500. Guide component; 501. Guide rod; 502. Guide sleeve;

[0040] 600. Limiting mechanism; 601. Protective sleeve; 602. Protrusion block; 603. Limiting groove; 604. Arc rod; 605. Contact plate; 606. Return spring. Detailed Implementation

[0041] The following combination Figures 1 to 7 This application will be described in further detail below.

[0042] Example 1

[0043] Please refer to the following carefully. Figure 1 , Figure 2 and Figure 4 A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch includes a primary equipment body 100 and an operating mechanism. The primary equipment body 100 includes a mechanism box 101, a fixed pole, a placement frame 102 fixedly installed on the back of the mechanism box 101, an isolating blade 103 and an insulating pull rod disposed on the surface of the placement frame 102, and a closing / opening handle 105 disposed on the front of the mechanism box 101. The insulating pull rod is composed of a support column 106 rotatably installed on the inner wall of the placement frame 102, an inclined support 107 fixedly installed on the surface of the support column 106, and a pull rod 104 hinged to the inclined support 107. The other end of the pull rod 104 is hinged to the surface of the isolating blade 103. The operating mechanism is composed of a protective cover 108 fixedly installed on the front of the mechanism box 101, and a closing / opening operating component 200 and an isolating blade operating component 300 respectively disposed on the inner wall of the protective cover 108.

[0044] Specifically, the solid-sealed pole is an integrated design that incorporates components such as a vacuum interrupter, current transformer, and voltage sensor. The opening and closing handle 105 is used to control the opening and closing of the interrupter. When the isolating switch 103 is in the closed state, rotating the opening and closing handle 105 can drive the interrupter to open. Afterward, the drive support column 106 will rotate, which will drive the inclined support 107 to rotate synchronously. After the inclined support 107 rotates, it can drive the pull rod 104 to rise, thereby driving the isolating switch 103 to disconnect.

[0045] Please refer to this carefully. Figure 3 , Figure 4 , Figure 5 as well as Figure 7 The isolation knife operating component 300 includes an internally threaded sleeve 301 rotatably mounted on the front of the mechanism housing 101, a through hole opened in the inner wall of the mechanism housing 101, a threaded post 302 helically driven on the inner wall of the internally threaded sleeve 301, a first spur gear 303 fixedly mounted on the surface of the support post 106, a first spur rack 304 fixedly mounted on the back of the threaded post 302, a driving component 400 disposed inside the protective cover 108, and a guide component 500 disposed inside the placement frame 102 for guiding the first spur rack 304. The first spur gear 303 meshes with the first spur rack 304 for transmission. The driving component 400 includes a worm 401 rotatably mounted on the inner wall of the protective cover 108, a worm wheel 402 fixedly mounted on the outer surface of the internally threaded sleeve 301, and a through hole opened in the inner bottom wall of the protective cover 108. One end of the worm 401 passes through the through hole and is fixedly mounted with a connecting ring 403. The worm wheel 402 meshes with the worm 401 for transmission.

[0046] Specifically, rotating the connecting ring 403 can drive the worm 401 to rotate. The worm wheel 402 meshes with the worm 401 to drive the internal threaded sleeve 301 to rotate. When the internal threaded sleeve 301 rotates, the internal threaded sleeve 301 and the threaded post 302 are driven to move by the helical transmission. This drives the first spur rack 304 to approach the first spur gear 303. The first spur rack 304 meshes with the first spur gear 303 to drive the support column 106 to rotate.

[0047] Please refer to this carefully. Figure 5 The guide component 500 includes guide rods 501 symmetrically fixedly installed on the inner wall of the placement frame 102, and guide sleeves 502 fixedly installed on both sides of the first straight rack 304, with the guide sleeves 502 slidingly engaged with the guide rods 501.

[0048] Specifically, when the internal threaded sleeve 301 and the threaded post 302 are in helical drive, the guide sleeve 502 will slide on the surface of the guide rod 501, thereby guiding the first straight rack 304 and preventing the threaded post 302 from rotating.

[0049] Please refer to this carefully. Figure 4 and Figure 7 The opening and closing operation component 200 includes a second spur gear 201 fixedly installed on the outer surface of the internal threaded sleeve 301, a guide frame 202 fixedly installed on the front of the mechanism box 101, a second spur rack 203 slidably engaged with the inner wall of the guide frame 202, a push rod 204 fixedly installed on the upper surface of the second spur rack 203, and a stop rod 205 fixedly installed on the surface of the opening and closing handle 105. The second spur rack 203 meshes with the second spur gear 201 for transmission, and the stop rod 205 and the push rod 204 are arranged to overlap each other.

[0050] Specifically, when the internal threaded sleeve 301 rotates, it can drive the second spur gear 201 to rotate. The second spur gear 201 meshes with the second spur rack 203 to drive the push rod 204 to approach the stop lever 205 and push the stop lever 205 to rotate. When the stop lever 205 rotates, it can drive the opening and closing handle 105 to rotate synchronously.

[0051] The working principle of this embodiment is as follows: When the transformer needs to be repaired, the isolating knife 103 is in a closed state. Then, rotating the connecting ring 403 drives the worm gear 401 to rotate. The worm wheel 402 meshes with the worm gear 401, thereby driving the internal threaded sleeve 301 to rotate. When the internal threaded sleeve 301 rotates, the guide rod 501 guides the first spur rack 304, thereby driving the threaded post 302 and the first spur rack 304 to approach the first spur gear 303. As the first spur rack 304 approaches the first spur gear 303, the rotation of the internal threaded sleeve 301 drives the second spur gear 201 to rotate. The second spur gear 201 meshes with the second spur rack 203, thereby driving the push rod 204 to move to the right and approach the stop lever 205, and pushing the stop lever 205. 05. Rotating counterclockwise, when the stop lever 205 rotates counterclockwise, it can drive the opening and closing handle 105 to rotate counterclockwise synchronously to open the arc-extinguishing chamber. At this time, the first straight rack 304 is not engaged with the first straight gear 303. Continue to rotate the connecting ring 403 to drive the worm gear 401 to rotate. At this time, the push rod 204 will move to the left side of the stop lever 205, and the first straight rack 304 will continue to approach the first straight gear 303 until the first straight gear 303 engages with the first straight rack 304. After the first straight rack 304 engages with the straight gear 303, it can drive the support column 106 to rotate. After the support column 106 rotates, it will drive the inclined support 107 to rotate synchronously. After the inclined support 107 rotates, it can drive the pull rod 104 to rise, thereby driving the isolating knife 103 to disconnect and carry out maintenance on the transformer.

[0052] Example 2

[0053] Compared with Embodiment 1, another implementation of this application is as follows:

[0054] Please refer to this carefully. Figure 2 and Figure 6 The back of the mechanism box 101 is provided with a limit mechanism 600. The limit mechanism 600 includes a protective sleeve 601 fixedly installed on the back of the mechanism box 101. The back of the opening and closing handle 105 extends into the interior of the protective sleeve 601 and is fixedly installed with a protrusion 602. The inner wall of the protective sleeve 601 is provided with a limit groove 603 for the protrusion 602 to move. The inner wall of the limit groove 603 is provided with an arc-shaped groove. An arc-shaped rod 604 is slidably fitted on the inner wall of the arc-shaped groove. Contact plates 605 are fixedly installed at both ends of the arc-shaped rod 604. A return spring 606 is sleeved on the surface of the arc-shaped rod 604. The two ends of the return spring 606 respectively abut against the two inner side walls of the arc-shaped groove. The contact plate 605 is made of iron, and the protrusion 602 is made of magnet.

[0055] Specifically, when the opening / closing handle 105 is rotated, it drives the protruding block 602 to rotate synchronously. When the protruding block 602 rotates, it drives the protruding block 602 to rotate along the inner wall of the limiting groove 603. When the protruding block 602 rotates to open the arc-extinguishing chamber, the protruding block 602 will rotate to contact the left contact plate 605 and be attracted to the left contact plate 605. At the same time, the return spring 606 will contract to store force. When the push rod 204 continues to move and disengages from the stop lever 205, the return spring 606 will reset and drive the stop lever 205 to rotate in the opposite direction. When the push rod 204 moves in the opposite direction, it can continue to push the stop lever 205 to drive the opening / closing handle 105 to rotate in the opposite direction, at which time the arc-extinguishing chamber can be closed.

[0056] The working principle of this embodiment is as follows: When the opening / closing handle 105 rotates counterclockwise, it drives the protruding block 602 to rotate synchronously. When the protruding block 602 rotates counterclockwise, it can drive the protruding block 602 to contact the contact plate 605 located on the left side of the limiting groove 603 and adhere to the contact plate 605. At the same time, the return spring 606 will contract to store force. When the push rod 204 continues to move to the right and disengages from the stop lever 205, the return spring 606 will reset and drive the protruding block 602 to rotate in the opposite direction by 20-30°. At this time, the stop lever 205 will rotate synchronously in the opposite direction by 20-30°. 0°, after maintenance is completed, the reverse rotation of the connecting ring 403 drives the worm 401 to rotate. The worm gear 402 meshes with the worm 401, thus driving the internal threaded sleeve 301 to rotate. When the internal threaded sleeve 301 rotates, the first spur rack 304 meshes with the first spur gear 303, driving the support column 106 to rotate and close the isolating knife 103. Continuing to rotate the connecting ring 403 in the reverse direction drives the worm 401 to rotate in the opposite direction. At this time, the first spur rack 304 disengages from the first spur gear 303. Simultaneously, the internal threaded sleeve 301 rotates... The second spur gear 201 rotates synchronously, and the meshing transmission between the second spur gear 201 and the second spur rack 203 drives the push rod 204 to move to the left and approach the stop lever 205, pushing the stop lever 205 to rotate clockwise. When the stop lever 205 rotates clockwise, it drives the opening and closing handle 105 to rotate synchronously to close the arc-extinguishing chamber. When the opening and closing handle 105 rotates clockwise, it drives the protrusion block 602 to rotate synchronously. When the protrusion block 602 rotates clockwise, it causes the protrusion block 602 to contact the contact plate 605 located on the right side of the limit groove 603. It adheres to the contact plate 605. At the same time, the return spring 606 contracts to store energy. When the push rod 204 continues to move to the left and disengages from the stop bar 205, the return spring 606 resets and drives the protrusion 602 to rotate in the opposite direction by 20-30°. At this time, the stop bar 205 will rotate in the opposite direction synchronously by 20-30°, preparing for the push rod 204 to continue contacting the stop bar 205 when it moves in the opposite direction. This design only requires rotating the connecting ring 403 to complete the opening and closing of the equipment body 100 once, and it conforms to the operation specifications of the disconnection sequence of the isolating knife 103 and the arc extinguishing chamber.

[0057] Operating steps:

[0058] I. Equipment Status Confirmation

[0059] Initial state check

[0060] Confirm that the isolation blade 103 is in the closed position;

[0061] The circuit breaker handle 105 is in the closed position;

[0062] II. Circuit Breaker Operation (Maintenance Preparation)

[0063] Rotate the connecting ring 403 on the protective cover 108 counterclockwise to drive the worm gear 401 to rotate.

[0064] The worm gear 401 drives the internal threaded sleeve 301 to rotate synchronously via the worm wheel 402;

[0065] First, the arc-extinguishing chamber is tripped.

[0066] The rotation of the internal threaded sleeve 301 simultaneously drives the second spur gear 201 to rotate, which in turn pushes the push rod 204 to the right via the second spur rack 203.

[0067] After the push rod 204 contacts the stop rod 205, it drives the opening and closing handle 105 to rotate counterclockwise, thus opening the arc-extinguishing chamber.

[0068] Then the isolating switch 103 tripped.

[0069] The internal threaded sleeve 301 rotates to drive the threaded column 302 to move backward. The first straight rack 304 will move backward a certain distance and then contact the first straight gear 303. Through the meshing of the first straight rack 304 and the straight gear 303, the support column 106 will rotate clockwise.

[0070] The inclined support 107 rotates with the support column 106, and pulls the isolating knife 103 to disconnect via the pull rod 104 (isolation first, then disconnection).

[0071] III. Closing Operation After Maintenance

[0072] Rotating the connecting ring 403 clockwise causes the worm gear 401 to drive the worm wheel 402 to rotate in the opposite direction.

[0073] First, close the isolating switch 103.

[0074] When the internal threaded sleeve 301 rotates in the opposite direction, the first spur rack 304 meshes with the first spur gear 303, the support column 106 rotates counterclockwise, and the isolation knife 103 closes.

[0075] Then the arc-extinguishing chamber was closed.

[0076] When the internal threaded sleeve 301 rotates in the opposite direction, the second straight rack 203 moves a certain distance to the left, which drives the push rod 204 to contact the stop lever 205. The push rod 204 pushes the stop lever 205 to the left, and the opening and closing handle 105 rotates clockwise, closing the arc extinguishing chamber.

[0077] IV. Operation of Limiting Mechanism 600 in Example 2

[0078] Trip limit switch

[0079] When the opening and closing handle 105 is rotated counterclockwise, the protrusion 602 attracts the contact plate 605 on the left side of the limiting groove 603, and the return spring 606 is compressed and released to drive the contact plate 605 to rotate clockwise by 20-30°.

[0080] Closing limit switch

[0081] When the circuit is closed, the protrusion 602 attracts the right contact plate 605, and the reset spring 606 releases its stored energy to drive the contact plate 605 to rotate counterclockwise by 20-30°.

Claims

1. A pole-mounted circuit breaker with integrated primary and secondary circuit breakers and a protective disconnecting switch, characterized in that, include: The primary equipment body (100) includes a mechanism box (101), a fixed pole, a placement frame (102) fixedly installed on the back of the mechanism box (101), an isolation knife (103) and an insulating pull rod disposed on the surface of the placement frame (102), and a switch opening and closing handle (105) disposed on the front of the mechanism box (101). The insulating tie rod consists of a support column (106) rotatably mounted on the inner wall of the placement frame (102), an inclined support (107) fixedly mounted on the surface of the support column (106), and a pull rod (104) hinged to the inclined support (107), and the other end of the pull rod (104) is hinged to the surface of the isolation knife (103). The operating mechanism consists of a protective cover (108) fixedly installed on the front of the mechanism box (101), and a switch opening and closing operating component (200) and an isolating knife operating component (300) respectively disposed on the inner wall of the protective cover (108).

2. The primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 1, characterized in that, The isolation knife operating component (300) includes an internal threaded sleeve (301) rotatably mounted on the front of the mechanism box (101), a through hole opened in the inner wall of the mechanism box (101), a threaded post (302) helically driven in the inner wall of the internal threaded sleeve (301), a first spur gear (303) fixedly mounted on the surface of the support post (106), a first spur rack (304) fixedly mounted on the back of the threaded post (302), a drive component (400) disposed inside the protective cover (108), and a guide component (500) disposed inside the placement frame (102) for guiding the first spur rack (304), wherein the first spur gear (303) meshes with the first spur rack (304) for transmission.

3. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 2, characterized in that, The drive component (400) includes a worm gear (401) rotatably mounted on the inner wall of the protective cover (108), a worm wheel (402) fixedly mounted on the outer surface of the internal threaded sleeve (301), and a through hole opened in the inner bottom wall of the protective cover (108).

4. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 3, characterized in that, One end of the worm (401) passes through the through hole and is fixedly installed with a connecting ring (403), and the worm wheel (402) meshes with the worm (401) for transmission.

5. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 2, characterized in that, The guide component (500) includes a guide rod (501) symmetrically fixedly installed on the inner wall of the placement frame (102), and a guide sleeve (502) fixedly installed on both sides of the first straight rack (304), and the guide sleeve (502) and the guide rod (501) are in sliding cooperation.

6. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 2, characterized in that, The opening and closing operation component (200) includes a second spur gear (201) fixedly installed on the outer surface of the inner threaded sleeve (301), a guide frame (202) fixedly installed on the front of the mechanism box (101), a second spur rack (203) slidingly fitted on the inner wall of the guide frame (202), a push rod (204) fixedly installed on the upper surface of the second spur rack (203), and a stop bar (205) fixedly installed on the surface of the opening and closing handle (105).

7. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 6, characterized in that, The second spur rack (203) meshes with the second spur gear (201) for transmission, and the stop lever (205) and the push rod (204) are arranged to overlap each other.

8. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 1, characterized in that, The back of the mechanism box (101) is provided with a limiting mechanism (600). The limiting mechanism (600) includes a protective sleeve (601) fixedly installed on the back of the mechanism box (101). The back of the opening and closing handle (105) extends into the interior of the protective sleeve (601) and is fixedly installed with a protrusion (602). The inner wall of the protective sleeve (601) is provided with a limiting groove (603) for the protrusion (602) to move.

9. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 8, characterized in that, The inner wall of the limiting groove (603) is provided with an arc-shaped groove, and an arc-shaped rod (604) is slidably fitted on the inner wall of the arc-shaped groove. Contact plates (605) are fixedly installed at both ends of the arc-shaped rod (604), and a reset spring (606) is sleeved on the surface of the arc-shaped rod (604).

10. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 9, characterized in that, The two ends of the reset spring (606) abut against the two inner sidewalls of the arc groove respectively, and the contact plate (605) is made of iron block and the protrusion (602) is made of magnet.

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