Manual opening and closing device

Abstract

The invention relates to a manual switch opening and closing device, which comprises a hand-held rod and a wrench head. The wrench head has two or more retaining recesses on the same circumference, and the retaining recesses are used for allowing the exposed part of the bolt assembly on the flange on the moving contact transmission connecting rod to be locked in; or the wrench head has a limiting arc surface adapted to the outer circumferential surface of the moving contact transmission connecting rod, and one or more retaining recesses for allowing the exposed part of the bolt assembly on the end flange of the moving contact transmission connecting rod to be locked in; the opening of the retaining recess is oriented perpendicular to the extension direction of the hand-held rod; applying force to the hand-held rod can drive the moving contact transmission connecting rod to rotate around its own axis through the wrench head, thereby driving the switch opening and closing action, and the structure is simple and the operation is convenient.

Description

Technical Field

[0001] The invention relates to a manual opening and closing device for a switch. Background Art

[0002] As an important switchgear in the power system, high-voltage circuit breakers are used to control, measure, protect and switch transmission lines. After the moving and static contacts of the circuit breaker are assembled, it is necessary to perform opening and closing operations to verify the status of the moving and static contacts of the circuit breaker body. Usually, the opening and closing actions of high-voltage circuit breakers require the output of the operating mechanism to complete. However, if the circuit breaker is stuck inside, the rapid movement of the operating mechanism may damage the arc extinguishing chamber of the circuit breaker. Therefore, manual opening and closing operations are required to realize the opening and closing operations of the high-voltage switch at a slow speed.

[0003] At present, there are two ways to manually open and close the circuit breaker: one is to manually open and close the circuit breaker body before the operating mechanism is installed on the high-voltage circuit breaker; the other is to open and close the circuit breaker when the operating mechanism is connected. However, the manual opening and closing device applied to the operating mechanism has a complex structure and is difficult to operate; the manual opening and closing device for the circuit breaker body directly acts on the crank box transmission shaft. Since the transmission shaft is mostly designed as a spline structure, the opening and closing device also needs to be designed as a spline structure. This structure is complex to process and has high cost. Moreover, during the rotation process, due to the space limitations of the circuit breaker beam and other structures, the opening and closing device needs to be removed every time a certain angle is rotated, and then reinstalled to continue rotating. During the process, the tooling needs to be removed continuously to adjust the angle and rotate again, which is inconvenient to operate. Summary of the invention

[0004] The object of the present invention is to provide a manual switch opening and closing device to solve the problems of complex structure and inconvenient operation of the current manual switch opening and closing device.

[0005] The technical solution of the manual switch opening and closing device of the present invention is:

[0006] Manual opening and closing device for switches, including:

[0007] A hand-held lever for manual application of wrenching force;

[0008] A wrench head connected to the end of the handle;

[0009] The wrench head has two or more locking recesses on the same circumference, and the locking recesses are used for the exposed part of the bolt assembly on the flange on the moving contact transmission connecting rod to be locked;

[0010] Alternatively, the wrench head has a limiting arc surface adapted to the outer peripheral surface of the moving contact transmission connecting rod, and one or more locking recesses for the exposed part of the bolt assembly on the end flange of the moving contact transmission connecting rod to be locked in;

[0011] The opening of the locking recess is oriented perpendicular to the extension direction of the handle;

[0012] Applying force to the handle can drive the moving contact transmission connecting rod to rotate around its own axis through the wrench head, thereby driving the switch to open and close.

[0013] Beneficial effect: when using the manual switch opening and closing device of the present invention, the exposed part of the bolt assembly on the end flange of the moving contact transmission connecting rod of the switch can be inserted through the corresponding locking recess on the wrench head, and the hand-held rod is twisted to rotate it in a plane perpendicular to the axis of the moving contact transmission connecting rod, and the hand-held rod drives the wrench head so that the inner walls of more than two locking recesses press more than two bolt assemblies, or the inner walls of more than one locking recess press more than one bolt assembly and the limiting arc surface presses on the outer peripheral surface of the moving contact transmission connecting rod, thereby generating a rotational torque, driving the moving contact transmission connecting rod to rotate around its own axis, and then realizing the switch opening and closing operation, and the rotational torque on the moving contact transmission connecting rod is formed by the locking cooperation between the locking recess and the bolt assembly, the structure is simple and the operation is convenient; not only can the manual opening and closing operation of the switch body be completed before the operating mechanism is installed on the switch, but also for switches using new operating mechanisms such as motor drive, the position of the switch body and the operating mechanism can be manually adjusted after the operating mechanism is installed.

[0014] Furthermore, a limiting structure is provided on the wrench head, and the limiting structure is used to stop and cooperate with the outer peripheral surface of the end flange.

[0015] Beneficial effect: The limiting structure cooperates with the outer peripheral surface of the end flange to limit the wrench head and prevent the manual opening and closing device of the switch from falling off during the rotation process.

[0016] Furthermore, the limiting structure is an arc-shaped retaining edge adapted to the outer peripheral surface of the end flange.

[0017] Beneficial effect: increasing the stop contact surface and ensuring the stability of the limit.

[0018] Furthermore, the wrench head includes a coaxially arranged movable inner ring and a fixed outer ring, both of which are arc-shaped ring structures, the movable inner ring can rotate around the axis relative to the fixed outer ring, the movable inner ring is provided with the locking recess, the fixed outer ring is fixedly connected to the handle, and a one-way locking structure is provided between the movable inner ring and the fixed outer ring.

[0019] Beneficial effect: It is unnecessary to repeatedly remove the manual opening and closing device of the switch during the process of rotating the moving contact transmission connecting rod, which is convenient for operation in a small space.

[0020] Furthermore, the one-way locking structure is a ratchet and pawl structure, and the ratchet and pawl structure is arranged between the relative circumferential surfaces of the movable inner ring and the fixed outer ring.

[0021] Beneficial effects: A ratchet pawl structure is formed by the relative circumferential surfaces between the movable inner ring and the fixed outer ring, which has a simple structure, is convenient for applying force, and has a stable structure.

[0022] Furthermore, the cross-section of the fixed outer ring is C-shaped with its opening facing the axis, a T-shaped groove is formed in the ring body of the fixed outer ring with the C-shaped cross-section, the cross-section of the movable inner ring is T-shaped and is adapted to the T-shaped groove, and the movable inner ring with the T-shaped cross-section is provided with the aforementioned locking recess on the ring body extending radially out of the fixed outer ring.

[0023] Furthermore, the wrench head is an arc-shaped ring structure with a central angle greater than 180°. The wrench head is clamped on the moving contact transmission connecting rod through an opening and is axially clamped on the bolt assembly.

[0024] Beneficial effect: The spanner head with the arc-shaped ring structure is conveniently mounted on the outer peripheral surface of the moving contact transmission connecting rod to form a top-pressing contact with the moving contact transmission connecting rod, thereby ensuring that the moving contact transmission connecting rod is well stressed.

[0025] Furthermore, the opening of the arc-shaped ring-shaped wrench head is a flared structure.

[0026] Beneficial effects: It is convenient to clamp the wrench head and the moving contact transmission connecting rod, and can reduce the wear on the moving contact transmission connecting rod.

[0027] Furthermore, the number of the retaining recesses on the wrench head is greater than the number of the bolt assemblies.

[0028] Beneficial effect: the locking recesses on the wrench head are arranged more densely, so that when the wrench head needs to be repeatedly disassembled and assembled for multiple tightening, the bolt assembly can be converted and locked into different locking recesses after each rotation of a small angle, which facilitates the adjustment of the position of the wrench head and ensures convenience when used in a small space.

[0029] Furthermore, the hand-held rod is a telescopic structure formed by each telescopic joint, and a locking structure is provided between each telescopic joint, and the locking structure is used to lock the position of the telescopic joint.

[0030] Beneficial effects: The telescopic structure makes the length of the hand-held rod adjustable, and when used for switches of different voltage levels, it can adapt to switch brackets of different heights, thereby improving the versatility of the manual opening and closing device of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the use state of the manual opening and closing device of the switch in the embodiment 1 of the present invention;

[0032] Figure 2 It is a structural schematic diagram of Embodiment 1 of the manual opening and closing device of a switch of the present invention;

[0033] Figure 3This is a structural diagram of Embodiment 2 of the manual switch opening and closing device of the present invention.

[0034] In the figure: 1. wrench head; 11. stop hole; 12. limit stop edge; 13. guide surface; 2. hand lever; 3. ratchet structure; 4. pawl; 5. lock structure; 6. circuit breaker body; 7. bolt assembly; 8. interphase connecting rod; 81. end flange; 14. movable inner ring; 15. fixed outer ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0037] It should be noted that the relational terms such as "first" and "second" that may appear in the specific embodiments of the present invention are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the possible statement "including one..." do not exclude the existence of other identical elements in the process, method, article or device that includes the elements.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention is further described in detail below in conjunction with embodiments.

[0041] Embodiment 1 of the manual opening and closing device of the switch of the present invention:

[0042] like Figure 1 and Figure 2 As shown, in this embodiment, the manual opening and closing device of the switch is applied to the circuit breaker, and the circuit breaker includes a circuit breaker body 6, in which a moving contact and a static contact are arranged, and an interphase connecting rod 8 is arranged between the three phases of the circuit breaker, and an end flange 81 is arranged at the end of the interphase connecting rod 8, and the end flange 81 is connected to the corresponding flange by bolts and nuts, so that the interphase connecting rod 8 is connected to the transmission crank arm extending from the crank arm box of the adjacent two phases through the end flange 81, thereby realizing the transmission connection between the three phases, and the interphase connecting rod 8 constitutes a moving contact transmission connecting rod, and when the interphase connecting rod 8 is rotated by the manual opening and closing device of the switch, the interphase connecting rod 8 can drive the moving contact and the static contact in the circuit breaker body 6 through the corresponding transmission structure to realize the opening and closing operation.

[0043] The manual opening and closing device of the switch includes a hand-held rod 2 and a wrench head 1 connected together. The bolts and nuts connected to the end flange 81 on the interphase connecting rod 8 form a bolt assembly 7. The wrench head 1 is sleeved on the exposed part of the bolt assembly 7. In this embodiment, the bolt head of the bolt assembly 7 is the exposed part. The wrench head 1 is sleeved on the bolt head, and the interphase connecting rod 8 is driven to rotate by applying force to the bolt assembly 7.

[0044] The wrench head 1 is an arcuate ring structure with a central angle greater than 180°, and the opening of the arcuate ring structure of the wrench head 1 is used to radially clamp on the outer peripheral surface of the interphase connecting rod 8. The wrench head 1 is a stepped arcuate ring structure, having a thick arcuate ring body and a thin arcuate ring-shaped limit stop edge 12 axially protruding from the arcuate ring body.

[0045] A plurality of locking holes 11 are evenly distributed along the circumference of the same circle on the arc-shaped annular body of the wrench head 1. The locking holes 11 form locking recesses for the exposed portion of the bolt assembly 7 to be inserted into. The extension direction of the locking holes 11 is consistent with the axial direction of the bolt assembly 7, and the opening of the locking holes 11 is oriented perpendicular to the extension direction of the hand-held rod 2, so that after the exposed portion of the bolt assembly 7 is inserted into the locking holes 11, it is convenient for the operator to apply force through the hand-held rod 2.

[0046] The locking hole 11 is a stepped hole, and is provided with a large diameter section, a middle diameter section and a small diameter section in sequence in the direction away from the bolt assembly 7. The large diameter section is used to accommodate the gasket at the bolt head position of the bolt assembly 7, and the middle diameter section is used for inserting the bolt head of the bolt assembly 7. The hole size of the middle diameter section is designed according to the size of the bolt head of the bolt assembly 7. The hole diameter of the small diameter section is smaller than the radial size of the bolt head of the bolt assembly 7, so as to facilitate the inspection of the corresponding insertion of the bolt assembly 7 and the locking hole 11 and to ensure the strength of the wrench head 1. After the wrench head 1 is sleeved on the bolt assembly 7 through the stepped locking hole 11, it can fit with the corresponding side of the end flange 81, which is convenient for applying force.

[0047] The number of the locking holes 11 is greater than the number of the bolt assemblies 7 on the end flange 81. In this embodiment, there are seven locking holes 11 and four bolt assemblies 7 on the end flange 81. The wrench head 1 is sleeved on three of the bolt assemblies 7, which makes the connection stable and convenient for applying force. Moreover, the locking recesses on the wrench head 1 are arranged more densely, so that when the wrench head 1 needs to be repeatedly disassembled and tightened for multiple times, the bolt assembly 7 can be switched to a different locking recess after each small angle rotation, which makes it convenient for the wrench head 1 to adjust its position and ensures its convenience when used in a small space.

[0048] In this embodiment, each retaining hole 11 can be tightly matched with the exposed portion of the bolt assembly 7, so that the gap between the fits can be reduced, ensuring that the device can rotate in a very small space.

[0049] The limit stop edge 12 is an arc-shaped stop edge that is adapted to the outer peripheral surface of the end flange 81. After the wrench head 1 is put on the bolt assembly 7, the limit stop edge 12 is stuck on the outer peripheral surface of the end flange 81. The limit stop edge 12 forms a limiting structure, which cooperates with the outer peripheral surface of the end flange 81 to limit the wrench head 1 and prevent the manual opening and closing device of the switch from falling off during rotation.

[0050] The opening of the arcuate annular body of the wrench head 1 is a flared structure, so that a guide surface 13 for guiding the interphase connecting rod 8 to be radially inserted is formed at the edge of the opening, which facilitates the connection between the wrench head 1 and the interphase connecting rod 8 and can reduce the wear on the interphase connecting rod 8.

[0051] In this embodiment, the wrench head 1 and the handle rod 2 are both integrated rod structures, which are low in cost and reliable in use.

[0052] When in use, the wrench head 1 is put on the bolt assembly 7 through the locking hole 11 on the wrench head 1, and the limit stop edge 12 is locked on the outer peripheral surface of the end flange 81. The operator twists the hand-held rod 2. When the force on the hand-held rod 2 is transmitted to the wrench head 1, the inner wall of the locking hole 11 on the wrench head 1 applies force to press the bolt assembly 7, and then the inter-phase connecting rod 8 is driven to rotate through the bolt assembly 7, thereby realizing the manual opening and closing operation of the circuit breaker.

[0053] Since a plurality of locking holes 11 are evenly distributed on the wrench head 1, after rotating a certain angle, the wrench head 1 can be disassembled, the position of the locking holes 11 on the wrench head 1 cooperating with the bolt assembly 7 can be adjusted, and the wrench head 1 and the interphase connecting rod 8 can be reconnected and continued to rotate. When used in a small space, the angle of the wrench head 1 needs to be adjusted each time. As long as a different locking hole 11 is switched each time to allow the bolt assembly 7 to be inserted, the interphase connecting rod 8 can be rotated by pushing the hand-held rod 2.

[0054] Compared with the prior art arrangement of realizing the opening and closing operation by spline-connecting the transmission shaft, the manual opening and closing device of the switch of the present application cooperates with the bolt assembly 7 through the locking hole 11, and has a simple structure, is easy to process and easy to operate; and the manual opening and closing device of the switch of the present invention directly applies the rotational torque to the phase-to-phase connecting rod 8, which can not only complete the manual opening and closing operation of the switch body before the operating mechanism is installed on the switch, but also for switches using new operating mechanisms such as motor drive, the position of the switch body and the operating mechanism can be manually adjusted after the operating mechanism is installed, which is easy to operate. At the same time, since the rotational torque is applied to the end flange of the phase-to-phase connecting rod, the force application position is close to the switch phase column, which is convenient for torque transmission and operation.

[0055] Embodiment 2 of the manual opening and closing device of the switch in the present invention:

[0056] The difference between this embodiment and the first embodiment is that, in this embodiment, a ratchet pawl structure is provided on the wrench head 1 and the hand-held rod 2 is a retractable structure.

[0057] like Figure 3 As shown, the wrench head 1 includes a movable inner ring 14 and a fixed outer ring 15 which are coaxially arranged and can rotate relative to each other. The movable inner ring 14 and the fixed outer ring 15 are both arc-shaped ring structures, and the central angles of the arc-shaped ring structures of the movable inner ring 14 and the fixed outer ring 15 are the same. The movable inner ring 14 is provided with a retaining hole 11 for inserting the exposed bolt head part of the bolt assembly 7, and the outer peripheral surface of the fixed outer ring 15 is fixedly connected to the handle rod.

[0058] A ratchet pawl structure is provided between the circumferences of the movable inner ring 14 and the fixed outer ring 15, and the ratchet pawl structure constitutes a one-way locking structure. The ratchet pawl structure includes a ratchet structure 3 provided on the outer circumference of the movable inner ring 14 and a pawl 4 provided on the inner circumference of the fixed outer ring 15. The cross section of the fixed outer ring 15 is a C-shape with an opening toward the axis. The inner side of the ring body of the fixed outer ring 15 is provided with a mounting ring groove for mounting the movable inner ring 14, and the mounting ring groove is a T-shaped groove. Accordingly, the outer circumferential side of the movable outer ring 14 has a T-shaped portion with a T-shaped cross section, and the T-shaped portion is used to adapt to the T-shaped groove. The locking recess is provided on the part of the ring body of the movable inner ring that radially extends out of the fixed outer ring. The ratchet structure 3 is provided on the T-shaped portion, and the pawl 4 is provided on the bottom of the T-shaped groove. The movable inner ring 14 is axially and radially limited by the cooperation of the T-shaped mounting ring groove and the T-shaped portion. The groove bottom wall of the T-shaped mounting ring groove forms a radial limit, and the groove side wall forms an axial limit.

[0059] When the manual switch opening and closing device in this embodiment is in use, the interphase connecting rod 8 rotates clockwise to drive the circuit breaker to close, and rotates counterclockwise to drive the circuit breaker to open. Because the ratchet pawl structure is provided, it is only necessary to push the hand-held rod 2 clockwise when closing, and there is no need to remove the wrench head 1 to adjust the angle. When opening, it is only necessary to rotate the pawl 4 to another position, and then push the hand-held rod 2 counterclockwise, thereby driving the circuit breaker to complete the opening operation.

[0060] The ratchet pawl structure allows the circuit breaker to rotate in the opposite direction without repeatedly removing the switch manual opening and closing device during the rotation of the interphase connecting rod 8, effectively solving the problem of being unable to manually open and close the circuit breaker in a small space. The structure is simple, safe and reliable to use, easy to disassemble and assemble, simple to operate, high efficiency, small size, and easy to carry for operators.

[0061] Due to the different voltage levels of high-voltage switches, the heights of switch brackets are different. In order to improve the versatility of the manual switch opening and closing device, the hand-held rod 2 is a retractable structure formed by various telescopic joints, and a locking structure 5 is provided between the telescopic joints. The locking structure 5 is used to lock the position of the telescopic joint. Through the retractable structure, the length of the hand-held rod 2 is adjustable. When used for switches of different voltage levels, it can adapt to switch brackets of different heights, thereby improving the versatility of the manual switch opening and closing device.

[0062] Embodiment 3 of the manual opening and closing device of the switch in the present invention:

[0063] The difference between this embodiment and embodiment 1 is that the wrench head in embodiment 1 is an arc-shaped ring structure with a central angle greater than 180°, while in this embodiment, the wrench head is an arc-shaped ring structure with a central angle of 90°. The wrench head is mounted on two bolt assemblies on the end flange. In other embodiments, the wrench head may also be a V-shaped structure, and a locking hole for inserting the bolt assembly is provided at the end of the V.

[0064] Embodiment 4 of the manual opening and closing device of the switch in the present invention:

[0065] The difference between this embodiment and embodiment 1 is that the wrench head in embodiment 1 is a step-shaped variable diameter arc ring structure with a limit stop edge on the wrench head, while in this embodiment, the wrench head is a constant diameter arc ring structure without a limit stop edge on the wrench head.

[0066] Embodiment 5 of the manual opening and closing device of the switch in the present invention:

[0067] The difference between this embodiment and embodiment 1 is that in embodiment 1, a locking hole is provided on the wrench head for inserting the bolt assembly, and the locking recess is formed by the locking hole, while in this embodiment, a locking groove is provided on the wrench head, the locking groove is provided for inserting the bolt assembly, and the locking recess is formed by the locking groove.

[0068] Embodiment 6 of the manual opening and closing device of the switch in the present invention:

[0069] The difference between this embodiment and embodiment 1 is that the retaining hole in embodiment 1 is a stepped hole, while in this embodiment, the retaining hole is a through hole of equal diameter adapted to the size of the bolt head of the corresponding bolt assembly.

[0070] Embodiment 7 of the manual opening and closing device of the switch in the present invention:

[0071] The difference between this embodiment and embodiment 1 is that the number of the retaining holes in embodiment 1 is greater than the number of corresponding bolt assemblies, while in this embodiment, the number of the retaining holes is consistent with the number of bolt assemblies.

[0072] Embodiment 8 of the manual opening and closing device of the switch in the present invention:

[0073] The difference between this embodiment and embodiment 1 is that the wrench head in embodiment 1 is sleeved on the bolt head of the bolt assembly, while in this embodiment, the wrench head is sleeved on the nut of the bolt assembly.

[0074] Embodiment 9 of the manual opening and closing device of the switch in the present invention:

[0075] The difference between this embodiment and embodiment 1 is that the limiting structure in embodiment 1 is a limiting stop edge adapted to the outer peripheral surface of the end flange, while in this embodiment, the limiting structure is a limiting column, which is used to press the outer peripheral surface of the end flange to form a limit.

[0076] Embodiment 10 of the manual opening and closing device of the switch in the present invention:

[0077] The difference between this embodiment and Embodiment 1 is that the manual switch opening and closing device in Embodiment 1 is used for a circuit breaker, while in this embodiment, the manual switch opening and closing device is used for an isolating switch.

[0078] Embodiment 11 of the manual opening and closing device of the switch in the present invention:

[0079] The difference between this embodiment and embodiment 1 is that, in embodiment 1, seven locking recesses are provided on the wrench head, and the exposed bolt heads of three bolt assemblies are clamped therein, and the different bolt assemblies are pressed against each other through the locking holes to form a rotational torque, while in this embodiment, only one locking hole is provided on the wrench head, and a limiting arc surface is provided on the wrench head for matching with the outer peripheral surface of the interphase connecting rod, and the bolt assemblies are pressed against the locking holes and the outer peripheral surface of the interphase connecting rod is pressed against the limiting arc surface to form a rotational torque, thereby rotating the interphase connecting rod.

[0080] Embodiment 12 of the manual opening and closing device of the switch in the present invention:

[0081] The difference between this embodiment and Embodiment 1 is that the manual switch opening and closing device in Embodiment 1 is used for a three-phase circuit breaker, the moving contact transmission connecting rod is a phase-to-phase connecting rod, and the manual switch opening and closing device acts on the phase-to-phase connecting rod, while in this embodiment, the switch is a single-phase circuit breaker, the moving contact transmission connecting rod is a transmission rod with a flange between the circuit breaker body and the operating mechanism, and the manual switch opening and closing device acts on the transmission rod.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A manual opening and closing device for a switch, characterized in that: include: A hand-held lever for manual application of wrenching force; A wrench head connected to the end of the handle; When the manual switch opening and closing device is used, the hand-held lever can be forced to drive the moving contact transmission connecting rod of the switch to rotate around its own axis through the wrench head, so as to drive the moving contact and the static contact of the switch to realize the opening and closing action through the moving contact transmission connecting rod. The moving contact transmission connecting rod is the phase-to-phase connecting rod between the three phases of the switch or the transmission rod between the switch body and the operating mechanism of the switch. The manual switch opening and closing device acts on the moving contact transmission connecting rod; The wrench head has two or more locking recesses on the same circumference, and the locking recesses are used for the exposed part of the bolt assembly formed by the bolt and nut that connect the end flange of the end of the moving contact transmission connecting rod with the corresponding flange to be locked in; The opening of the locking recess is oriented perpendicular to the extension direction of the hand-held rod; the wrench head is used to be sleeved on the exposed part of the bolt assembly, the wrench head is a step-shaped arc ring structure, the opening of the arc ring structure is used to radially clamp on the outer peripheral surface of the moving contact transmission connecting rod, the wrench head has an arc-shaped annular body and an arc-shaped annular limit stop edge axially protruding on the arc-shaped annular body, the limit stop edge is used to stop and cooperate with the outer peripheral surface of the end flange, the locking recess is arranged on the arc-shaped annular body and is used for the wrench head to be axially clamped on the bolt assembly.

2. The manual switch opening and closing device according to claim 1 is characterized in that: The wrench head includes a coaxially arranged movable inner ring and a fixed outer ring. Both the movable inner ring and the fixed outer ring are arc-shaped ring structures. The movable inner ring can rotate relative to the fixed outer ring around the axis. The movable inner ring is provided with the locking recess. The fixed outer ring is fixedly connected to the handle rod, and a one-way locking structure is provided between the movable inner ring and the fixed outer ring.

3. The manual opening and closing device of the switch according to claim 2 is characterized in that: The one-way locking structure is a ratchet and pawl structure, and the ratchet and pawl structure is arranged between the relative circumferential surfaces of the movable inner ring and the fixed outer ring.

4. The manual switch opening and closing device according to claim 3 is characterized in that: The cross-section of the fixed outer ring is C-shaped with its opening facing the axis, a T-shaped groove is formed in the ring body of the fixed outer ring with a C-shaped cross-section, the cross-section of the movable inner ring is T-shaped and is adapted to the T-shaped groove, and the movable inner ring with a T-shaped cross-section is provided with the aforementioned locking recess on the ring body that radially extends out of the fixed outer ring.

5. The manual switch opening and closing device according to claim 1 is characterized in that: The wrench head is an arc-shaped ring structure with a central angle greater than 180°.

6. The manual switch opening and closing device according to claim 5 is characterized in that: The opening of the arc-shaped ring-shaped wrench head is a flared structure.

7. The manual switch opening and closing device according to claim 1 is characterized in that: The number of the locking recesses on the wrench head is greater than the number of the bolt assemblies.

8. The manual switch opening and closing device according to claim 1 is characterized in that: The hand-held rod is a retractable structure formed by each telescopic joint, and a locking structure is provided between each telescopic joint, and the locking structure is used to lock the position of the telescopic joint.

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