Isolation operation interlocking structure and isolation circuit breaker

Abstract

The invention provides an isolation operation interlocking structure and an isolation circuit breaker. The isolation operation interlocking structure comprises a middle door interlocking structure and a switch-on and switch-off interlocking structure which are arranged on two opposite sides of an operating contact during installation. The opening and closing interlocking structure and the middle door interlocking structure are correspondingly linked with the opening and closing state of the opening and closing mechanism and the opening and closing state of the middle door, and the two interlocking structures can be stopped in a direct butt joint channel of the operating contact and the isolation operating handle to prevent the isolation operating handle from entering the channel to be in butt joint with the operating contact. Or a butt joint channel can be rotationally formed to expose the operating contact, so that the handle can be inserted into the operating contact to operate the isolation function of the isolation circuit breaker, and therefore, the isolation switch is prevented from being operated when the middle door is opened and the opening and closing mechanism is closed, the isolation operation safety is improved, and the risk of electric shock is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switchgear, and in particular to an isolating operation interlocking structure and an isolating circuit breaker. Background Art

[0002] The longitudinal rotation isolating circuit breaker combines the high-voltage vacuum circuit breaker and the high-voltage isolating switch into one. The circuit breaker operating mechanism drives the moving contact of the vacuum interrupter in the three-phase pole to open and close the circuit. The isolation operating mechanism is used to rotate the three-phase pole longitudinally to achieve the isolation function. In order to prevent staff from operating incorrectly, avoid electric shock accidents, and improve the safety of isolation operations, an interlocking device is provided in the longitudinal rotation isolating circuit breaker. The isolating switch can only be operated when the middle door of the longitudinal rotation isolating circuit breaker (the door leaf corresponding to the trolley position) is closed, that is, the isolation operating handle can be inserted after the middle door is closed to connect with the operating contact on the forward and reverse motor to control the forward and reverse motor to control the isolation function. At present, the interlocking device structure in the longitudinal rotation isolating circuit breaker is relatively complex, occupies a large installation space, and causes the size of the switchgear to be large. Summary of the invention

[0003] The object of the present invention is to provide an isolating operation interlocking structure with simple structure, safety and reliability, and an isolating circuit breaker using the same.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present invention provides an isolation operation interlock structure, which is used to be set in the operating mechanism of the isolation circuit breaker and is arranged near the operating contacts of the forward and reverse motor of the operating mechanism, including an opening and closing interlock structure and a middle door interlock structure arranged on opposite sides of the operating contact during installation; the middle door interlock structure is used to block the isolation operation handle and the operating contact in the docking channel to prevent the isolation operation handle from entering the docking channel and docking with the operating contact when the middle door is opened, and can rotate to give way to the docking channel between the isolation operation handle and the operating contact under the pressure of the isolation operation handle when the middle door is closed; the opening and closing interlock structure is used to be linked with the opening and closing mechanism, and when the opening and closing mechanism is in the closed state, it is blocked in the docking channel between the isolation operation handle and the operating contact to prevent the isolation operation handle from entering the docking channel and docking with the operating contact, and when the opening and closing mechanism is in the open state, it can rotate to give way to the docking channel between the isolation operation handle and the operating contact under the pressure of the isolation operation handle.

[0006] In one embodiment, the middle door interlocking structure includes a first mounting seat, a limit fork and a linkage touch rod; the first mounting seat is used to be installed on the frame of the operating mechanism; the limit fork is rotatably mounted on the first mounting seat, and includes a first limit arm, one end of which is horizontally arranged in front of the operating contact; the linkage touch rod includes a clamping rod and a pressure rod, the clamping rod is clamped on the side of the first limit arm facing the operating contact, and the pressure rod is used to receive the pressure from the middle door and rotate in the vertical direction to make the clamping rod leave the rotation range of the first limit arm.

[0007] In one embodiment, the middle door interlocking structure also includes a first tension spring, the limit fork includes a connecting arm connected to the first limit arm as a whole and defining an angle, the first tension spring is arranged within the angle, and the two ends are respectively connected to the first mounting seat and the connecting arm, and is used to reset the first limit arm horizontally in front of the operating contact after the force of the isolation operating handle on the first limit arm is cancelled.

[0008] In one embodiment, a plurality of spring connection holes are provided on the connection arm along the length direction, and the first tension spring hook is provided on the spring connection hole.

[0009] In one embodiment, the clamping rod is connected to one end of the touch-pressure rod and defines an acute angle, and the width of the touch-pressure rod gradually decreases in the direction away from the clamping rod; the linkage touch rod also includes a counterweight head, which is connected to the connecting portion of the clamping rod and the touch-pressure rod, and the counterweight head is provided with a shaft hole for passing a shaft for the linkage touch rod to rotate around the shaft.

[0010] In one embodiment, the opening and closing interlocking structure includes a second mounting seat, a limit arm and a linkage block, the second mounting seat is used to be fixed to the frame of the operating mechanism, the limit arm includes a second limit arm arranged in the transverse direction and a block arm arranged in the vertical direction and connected to one end of the second limit arm, the second limit arm is rotatably arranged on the second mounting seat, and its end away from the block arm is horizontally arranged in front of the operating contact, and the linkage block is used to link with the opening and closing mechanism, and can be rotatably entered into the rotation path of the block arm and limit the rotation of the limit block arm.

[0011] In one embodiment, the opening and closing interlocking structure also includes a second tension spring, which is arranged on the side of the limit arm facing the forward and reverse motor, one end of which is hooked on the second mounting seat, and the other end is hooked on an end of the second limit arm close to the stop arm, and is used to reset the second limit arm horizontally in front of the operating contact after the force of the isolation operating handle on the second limit arm is cancelled.

[0012] In one embodiment, the opening and closing interlocking structure also includes a limit column for limiting the rotation angle of the second limit arm; the second limit arm is provided with a rotating shaft hole and a limit groove, the rotating shaft hole is provided at one end of the second limit arm close to the stop arm and is used to pass the rotating shaft and connect with the second mounting seat, the limit groove is provided on the side of the rotating shaft hole close to the stop arm and on the side of the second limit arm facing the forward and reverse motor; the second mounting seat is respectively provided with a second mounting hole and a limit column mounting hole corresponding to the rotating shaft hole and the limit groove; the limit column is inserted into the limit column mounting hole of the second mounting seat and abuts against the inner side of the limit groove.

[0013] In one embodiment, the opening and closing interlocking structure is configured such that: the limit arm rotates in a horizontal direction, and the linkage block rotates in a vertical direction.

[0014] As a second aspect, the present invention also provides an isolating circuit breaker, comprising an operating mechanism and the above-mentioned isolating operation interlock structure, wherein the operating mechanism comprises a forward and reverse motor having an operating contact, and the opening and closing interlock structure and the middle door interlock structure are arranged on opposite sides of the operating contact.

[0015] The beneficial effects of the technical solution provided by the present invention are as follows: by setting an opening and closing interlocking structure and a middle door interlocking structure, which are linked with the opening and closing state of the opening and closing mechanism and the switch state of the middle door, both interlocking structures can be blocked in the direct docking channel between the operating contact and the isolation operating handle to prevent the isolation operating handle from entering the channel and docking with the operating contact, or can be rotatably released from the docking channel to expose the operating contact so that the handle can be inserted into the operating contact to operate the isolation function of the isolation circuit breaker, thereby avoiding operating the isolation switch when the middle door is opened and the opening and closing mechanism is closed, thereby improving the safety of the isolation operation and avoiding the risk of electric shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0017] Figure 1 A three-dimensional diagram of an isolation operation interlocking structure provided by an embodiment of the present invention;

[0018] Figure 2 A three-dimensional diagram of a limit fork provided in one embodiment of the present invention;

[0019] Figure 3 A three-dimensional diagram of a linkage contact rod provided in one embodiment of the present invention;

[0020] Figure 4 A three-dimensional diagram of a second mounting base provided in accordance with an embodiment of the present invention;

[0021] Figure 5A three-dimensional diagram of a position-limiting crank arm provided in one embodiment of the present invention;

[0022] Figure 6 A three-dimensional diagram of a first mounting base provided in accordance with an embodiment of the present invention;

[0023] Figure 7 A three-dimensional diagram of the partial structure of an operating mechanism of an isolating circuit breaker provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0025] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0026] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0027] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] The present invention relates to an isolation operation interlock structure, which is used to be set in the operating mechanism of the isolation circuit breaker, and at least part of its structure is horizontally placed in front of the operating contact 210 on the forward and reverse motor 200 in the operating mechanism, which can block the isolation operation handle from entering the position where it is connected with the operating contact 210 when the middle door of the isolation circuit breaker is opened or the opening and closing mechanism is closed, and the connection between the isolation operation handle and the operating contact 210 on the forward and reverse motor 200 in the operating mechanism is blocked; when the middle door of the isolation circuit breaker is closed or the opening and closing mechanism is in the opening state, the entry channel of the isolation operation handle is opened for the isolation operation handle to connect with the operating contact 210, so that the operating contact 210 on the motor is rotated by the isolation operation handle, the rotation direction of the forward and reverse motor 200 is changed, and the three-phase pole of the circuit breaker is operated in the isolation position or the circuit connection position. Therefore, the isolation operation of the isolation circuit breaker is limited to be performed only when the middle door is closed and the opening and closing mechanism is in the opening state, avoiding the operation of the isolation switch when the middle door is opened or the opening and closing mechanism is closed, improving the safety of the isolation operation, and avoiding the risk of electric shock.

[0029] The isolation operation interlock structure includes a middle door interlock structure 10 and a switch-on / off interlock structure 20 . The middle door interlock structure 10 and the switch-on / off interlock structure 20 are both arranged close to the operating contact 210 during installation, and are respectively arranged on two opposite sides of the operating contact 210 .

[0030] The middle door interlocking structure 10 is used to block the isolation operating handle and the operating contact 210 in the docking channel when the middle door is opened to prevent the isolation operating handle from entering the docking channel and docking with the operating contact 210. When the middle door is closed, the isolation operating handle can be rotated to release the docking channel between the isolation operating handle and the operating contact 210 under the pressure of the isolation operating handle.

[0031] In one embodiment, the middle door interlocking structure 10 includes a first mounting seat 13 , a limiting fork 11 and a linkage contact rod 12 .

[0032] The first mounting seat 13 is used to be installed on the frame 400 of the operating mechanism, and includes a first mounting plate 131 arranged horizontally and a first fixing plate 132 bent downward by the first mounting plate 131. The first mounting plate 131 is provided with a first mounting hole 1311 for installing a rotating shaft connected to the limiting fork 11, and the first fixing plate 132 is provided with a first fixing hole 1321 for inserting a screw to fix it to the frame 400 of the operating mechanism.

[0033] The limiting fork 11 is rotatably mounted on the first mounting plate 131 by inserting a rotating shaft into the first mounting hole 1311 , and includes a first limiting arm 111 , one end of which is horizontally arranged in front of the operating contact 210 .

[0034] The linkage contact rod 12 includes an integrally formed abutting rod 121 and a contact pressure rod 122. The abutting rod 121 abuts against the side of the first limit arm 111 facing the operating contact 210 to limit the rotation of the first limit arm 111, that is, when the abutting rod 121 abuts against the side wall of the first limit arm 111, the first limit arm 111 cannot rotate toward the operating contact 210, specifically, the first limit arm 111 cannot rotate clockwise. The contact pressure rod 122 is used to receive the contact pressure from the push piece 300 on the inner side of the middle door and rotate in the vertical direction to make the abutting rod 121 leave the rotation range of the first limit arm 111, so that the first limit arm 111 can rotate clockwise under the action of an external force (such as the abutting action from the isolation operating handle), thereby freeing the docking channel between the isolation operating handle and the operating contact 210.

[0035] Preferably, the middle door interlocking structure 10 also includes a first tension spring 14, the limit fork 11 includes a connecting arm 112 which is connected to the first limit arm 111 as a whole and defines an angle, the first tension spring 14 is arranged within the angle, and the two ends of the first tension spring 14 are respectively connected to the first mounting seat 13 and the connecting arm 112, and are used to reset the first limit arm 111 horizontally in front of the operating contact 210 after the force of the isolation operating handle on the first limit arm 111 is cancelled.

[0036] The limit fork 11 also includes a mounting block 113 connected at the connection portion between the first limit arm 111 and the connecting arm 112, and the mounting block is provided with a rotating shaft hole 1131, so that the limit fork 11 can be rotatably mounted on the first mounting plate 131 by means of the rotating shaft passing through the rotating shaft hole and the first mounting hole 1311.

[0037] Preferably, a side of the first mounting plate 13 away from the first mounting hole 1311 extends away from the first mounting hole 1311 to form a spring connecting arm, which is provided with a spring connecting hole 1312 , and one end of the first tension spring 14 is hooked on the spring connecting hole 1312 .

[0038] In one embodiment, a plurality of spring connecting holes 1121 are provided on the connecting arm 112 along the length direction, and the other end of the first tension spring 14 can be hooked on one of the spring connecting holes 1121 as needed, so that the elastic force of the first tension spring 14 can be adjusted to ensure that the first limiting arm 111 can be accurately reset.

[0039] Preferably, the clamping rod 121 is connected to one end of the touch-pressure rod 122 and defines an acute angle, and the width of the touch-pressure rod 122 gradually decreases in the direction away from the clamping rod 121; the linkage touch rod 12 also includes a counterweight head 123, which is connected to the connecting portion of the clamping rod 121 and the touch-pressure rod 122, and the counterweight head 123 is provided with a shaft hole 1231 for passing a shaft for the linkage touch rod 12 to rotate around the shaft.

[0040] By setting the width of the contact pressure rod 122 to gradually decrease in the direction away from the clamping rod 121 and connecting the counterweight head 123, the center of gravity of the linkage contact rod 12 is lowered, and the linkage contact rod 12 can automatically reset under the action of gravity after the pressure of the middle door is cancelled, so that the clamping rod 121 is pressed against the first limit arm 111.

[0041] The opening and closing interlocking structure 20 is used to work in conjunction with the opening and closing mechanism in the operating mechanism. When the opening and closing mechanism is in the closed state, it is blocked in the docking channel between the isolation operating handle and the operating contact 210 to prevent the isolation operating handle from entering the docking channel and docking with the operating contact 210. When the opening and closing mechanism is in the open state, it can be rotated under the pressure of the isolation operating handle to make way for the docking channel between the isolation operating handle and the operating contact 210.

[0042] In one embodiment, the opening and closing interlocking structure 20 includes a second mounting seat 23 , a limiting arm 21 and a linkage stopper 22 .

[0043] The second mounting seat 23 is used to be fixed to the frame 400 of the operating mechanism, and includes a second mounting plate 231 arranged horizontally and a second fixing plate 232 formed by bending one end of the second mounting plate 231 upward. The second mounting plate 231 is provided with a second mounting hole 2311, and the second mounting hole is used to pass the rotating shaft and connect with the limiting crank arm 21. The second fixing plate 232 is provided with a fixing hole 2321 for passing the screw to connect with the frame.

[0044] The limiting arm 21 includes a second limiting arm 211 arranged in the transverse direction and a blocking arm 212 arranged in the vertical direction and connected to one end of the second limiting arm 211. The second limiting arm 211 is rotatably arranged on the second mounting seat 23, and its end away from the blocking arm 212 is horizontally arranged in front of the operating contact 210. The linkage block 22 is used to link with the opening and closing mechanism, and can be rotatably entered into the rotation path of the blocking arm 212 and limit the rotation of the limiting blocking arm 212.

[0045] In one embodiment, the opening and closing interlocking structure 20 further includes a second tension spring 24, which is used to reset the second limit arm 211 to lie horizontally in front of the operating contact 210 after the force of the isolation operating handle on the second limit arm 211 is cancelled. The second tension spring 24 is arranged on the side of the limit arm 21 facing the forward and reverse motor 200. A protrusion is provided at a position of the second limit arm close to the stop arm, and a spring connection hole 214 is provided on the protrusion; the second mounting plate is provided with a spring connection hole 2312 at one end where the second mounting hole is located, and the two ends of the second tension spring are respectively hooked on the spring connection hole 214 of the second limit arm and the spring connection hole 2312 of the second mounting seat.

[0046] In one embodiment, the opening and closing interlocking structure 20 also includes a limiting column 25 for limiting the rotation angle of the second limiting arm 211; the second limiting arm 211 is provided with a rotating shaft hole 213 and a limiting groove 215, the rotating shaft hole 213 is provided at one end of the second limiting arm 211 close to the blocking arm 212 and is used to pass the rotating shaft and connect with the second mounting seat 23, the limiting groove 215 is provided on the side of the rotating shaft hole 213 close to the blocking arm 212 and is provided on the inner side of the second limiting arm 211 facing the forward and reverse motor 200; the second mounting seat 23 is respectively provided with the second mounting hole 2311 and the limiting column mounting hole 2314 corresponding to the rotating shaft hole and the limiting groove 215; the limiting column 25 is inserted into the limiting column mounting hole 2314 of the second mounting seat 23 and abuts against the inner side of the limiting groove 215.

[0047] In addition, it can be understood that the second mounting plate 231 is also provided with a clearance gap 2313 that matches the forward and reverse motor housing, and the limiting column mounting hole 2314 is arranged close to the clearance gap 2313.

[0048] In one embodiment, the limit arm 21 and the limit fork 11 are configured to rotate in the horizontal direction, and the linkage block 22 and the linkage contact rod 12 rotate in the vertical direction, so as to cleverly realize the limit operation of the isolation operating handle through the movement of two planes, thereby reducing the size of the interlocking structure. The limit arm 21 and the limit fork 11 move in opposite directions under the force of the isolation operating handle, one of which rotates clockwise and the other rotates counterclockwise.

[0049] As a second aspect, the present invention also provides an isolating circuit breaker, comprising a three-phase pole, an operating mechanism and the above-mentioned isolating operation interlocking structure, wherein the operating mechanism is used to switch the working state of the three-phase pole, so that the isolating circuit breaker works in the circuit breaker or isolator state, and can correspondingly switch the circuit breaker to work in the open or closed state, and make the isolator work in the isolation or circuit connection state. The operating mechanism includes a forward and reverse motor 200 with an operating contact 210, and the working state of the isolator can be switched by rotating the operating contact 210. The opening and closing interlocking structure 20 and the middle door interlocking structure 10 are arranged on opposite sides of the operating contact 210, and are respectively linked with the opening and closing of the opening and closing mechanism and the middle door. Since the isolating circuit breaker adopts the above-mentioned isolating operation interlocking structure, its isolation operation is safer and more reliable than the existing isolating circuit breaker, and the overall size of the isolating circuit breaker is also reduced compared with the existing isolating circuit breaker.

[0050] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions invented in the present invention (but not limited to) to form a technical solution.

[0051] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. An isolating operation interlocking structure, used to be set in the operating mechanism of the isolating circuit breaker and arranged close to the operating contact of the forward and reverse motor of the operating mechanism, characterized in that: It includes a middle door interlocking structure and a switch-on and switch-off interlocking structure which are arranged on opposite sides of the operating contact during installation; The middle door interlocking structure is used to block the isolation operating handle and the operating contact in the docking channel when the middle door is opened to prevent the isolation operating handle from entering the docking channel and docking with the operating contact; when the middle door is closed, the isolation operating handle can be rotated to let go of the docking channel between the isolation operating handle and the operating contact under the pressure of the isolation operating handle; The opening and closing interlocking structure is used to work in conjunction with the opening and closing mechanism. When the opening and closing mechanism is in the closed state, it is blocked in the docking channel between the isolation operating handle and the operating contact to prevent the isolation operating handle from entering the docking channel and docking with the operating contact. When the opening and closing mechanism is in the open state, it can be rotated under the pressure of the isolation operating handle to make way for the docking channel between the isolation operating handle and the operating contact.

2. The isolation operation interlocking structure according to claim 1, characterized in that: The middle door interlocking structure comprises a first mounting seat, a limit fork and a linkage contact rod; The first mounting seat is used to be mounted on the frame of the operating mechanism; The limit fork is rotatably mounted on the first mounting seat, and comprises a first limit arm, one end of which is horizontally arranged in front of the operating contact; The linkage contact rod includes a clamping rod and a contact pressure rod. The clamping rod is clamped on the side of the first limit arm facing the operating contact. The contact pressure rod is used to receive the contact pressure from the middle door and rotate in the vertical direction to make the clamping rod leave the rotation range of the first limit arm.

3. The isolation operation interlocking structure according to claim 2, characterized in that: The middle door interlocking structure also includes a first tension spring, the limit fork includes a connecting arm connected to the first limit arm as a whole and defining an angle, the first tension spring is arranged within the angle, and the two ends are respectively connected to the first mounting seat and the connecting arm, and is used to reset the first limit arm horizontally in front of the operating contact after the force of the isolation operating handle on the first limit arm is cancelled.

4. The isolation operation interlocking structure according to claim 3, characterized in that: The connecting arm is provided with a plurality of spring connecting holes along the length direction, and the first tension spring hook is arranged on the spring connecting hole.

5. The isolation operation interlocking structure according to claim 2, characterized in that: The abutment rod is connected to one end of the pressure contact rod and defines an acute angle, and the width of the pressure contact rod gradually decreases in a direction away from the abutment rod; The linkage contact rod also includes a weight head, which is connected to the connection portion of the pressing rod and the contact pressure rod. The weight head is provided with a shaft hole for passing a shaft through which the linkage contact rod can rotate around the shaft.

6. The isolation operation interlocking structure according to claim 1, characterized in that: The opening and closing interlocking structure includes a second mounting seat, a limit arm and a linkage block. The second mounting seat is used to be fixed to the frame of the operating mechanism. The limit arm includes a second limit arm arranged in the transverse direction and a block arm arranged in the vertical direction and connected to one end of the second limit arm. The second limit arm is rotatably arranged on the second mounting seat, and its end away from the block arm is horizontally arranged in front of the operating contact. The linkage block is used to link with the opening and closing mechanism, and can be rotatably entered into the rotation path of the block arm and limit the rotation of the limit block arm.

7. The isolation operation interlocking structure according to claim 6, characterized in that: The opening and closing interlocking structure also includes a second tension spring, which is arranged on the side of the limit arm facing the forward and reverse motor, with one end of the second tension spring hooked on the second mounting seat and the other end hooked on an end of the second limit arm close to the stop arm, and is used to reset the second limit arm horizontally in front of the operating contact after the force of the isolation operating handle on the second limit arm is cancelled.

8. The isolation operation interlocking structure according to claim 6, characterized in that: The opening and closing interlocking structure also includes a limiting column for limiting the rotation angle of the second limiting arm; The second limiting arm is provided with a shaft hole and a limiting groove, the shaft hole is provided at one end of the second limiting arm close to the blocking arm and is used to pass the shaft through and connect with the second mounting seat, the limiting groove is provided at one side of the shaft hole close to the blocking arm and at the side of the second limiting arm facing the forward and reverse motor; The second mounting seat is provided with a second mounting hole and a limiting column mounting hole corresponding to the rotating shaft hole and the limiting groove respectively; The limiting column is inserted into the limiting column mounting hole of the second mounting seat and abuts against the inner side of the limiting groove.

9. The isolation operation interlocking structure according to claim 6, characterized in that: The opening and closing interlocking structure is configured such that: the limit crank arm rotates in a horizontal direction, and the linkage block rotates in a vertical direction.

10. An isolating circuit breaker, comprising an operating mechanism, wherein the operating mechanism comprises a forward and reverse motor having an operating contact, characterized in that: It also comprises the isolation operation interlock structure according to any one of claims 1 to 9, wherein the opening and closing interlock structure and the middle door interlock structure are arranged on opposite sides of the operating contact.

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