Electrical cabinet and integrated three-position isolation grounding switch mechanism thereof

Abstract

The invention relates to the technical field of electrical switch equipment, and discloses an electrical cabinet and an integrated three-position isolation grounding switch mechanism thereof. In the switch mechanism, an isolation operation assembly and a grounding operation assembly are symmetrically arranged on a frame structure, each operation assembly comprises an operation shaft, an input transmission part, an output transmission part and a middle transmission part, and a first pin is arranged on the middle transmission part. The two ends of the spring are connected with the first pins on the two sides respectively, when the operation shaft on any side rotates, the corresponding first pin moves to enable the spring to store energy, and when the first pins on the two sides and the axis of the spring are collinear and then cross a dead point, the spring releases energy to drive the corresponding output transmission piece to rotate rapidly. According to the invention, two functions of isolation and grounding are simultaneously realized in a single module through the symmetrical double-operation assembly and the over-dead-point quick energy release mechanism, and the device has the advantages of compact structure, quick and reliable action, good symmetry and perfect safety protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical switchgear, in particular to an electrical cabinet and an integrated three-position isolation grounding switch mechanism thereof. BACKGROUND

[0002] In the switchgear of an electrical cabinet, isolation switches and grounding switches are important components for ensuring the safe operation of power systems. Isolation switches are used to isolate the circuit from the power supply during equipment maintenance, while grounding switches are used to reliably ground the equipment to eliminate residual charge and prevent electric shock. Traditional electrical cabinets usually have separate isolation and grounding functions in different independent modules, which has many problems.

[0003] In the prior art, due to the separation of isolation switch and grounding switch functions, the internal structure of the electrical cabinet is complex, and independent installation space and operating mechanisms are required, making the device bulky and difficult to install and maintain. At the same time, the separate design makes it difficult to effectively coordinate and link the two functions, increasing the complexity of system integration.

[0004] On the other hand, in traditional designs, isolation and grounding operations often use different mechanical structures and driving methods, and the action characteristics on both sides differ, resulting in inconsistent switch performance and affecting the stability and reliability of device operation.

[0005] In terms of safety protection, the prior art lacks effective mechanical interlocking and interlocking protection mechanisms, and there is a risk of misoperation during operation, where the isolation switch and the grounding switch move simultaneously, which may cause serious safety accidents. SUMMARY

[0006] The purpose of the present application is to provide an electrical cabinet and an integrated three-position isolation grounding switch mechanism to solve the technical problem that the prior art cannot simultaneously realize isolation and grounding operation functions in one module.

[0007] To solve the above technical problems, the present application provides an integrated three-position isolation grounding switch mechanism, comprising: a frame structure; an isolation operation assembly and a grounding operation assembly, the isolation operation assembly and the grounding operation assembly being symmetrically arranged on the frame structure; The isolation operation assembly and the grounding operation assembly each include an operation shaft, an input transmission member, an output transmission member, and an intermediate transmission member, the input transmission member being fixed on the operation shaft, the intermediate transmission member being arranged between the input transmission member and the output transmission member, and the intermediate transmission member being provided with a first pin; A spring energy storage assembly comprising a spring, two ends of the spring are connected with the first pin of the isolation operation assembly and the grounding operation assembly respectively, when the operation shaft of either side rotates, the first pin of the side moves to make the spring store energy, when the first pin of both sides and the spring shaft center are collinear, the spring releases energy to drive the output transmission member of the side to rotate.

[0008] Optionally, a dynamic sealing assembly is further included, the dynamic sealing assembly comprises a double notch component, a connecting rod mechanism and a dynamic seal, the double notch component is matched with the output transmission member, two ends of the connecting rod mechanism are connected with the double notch component and the dynamic seal respectively.

[0009] Optionally, a second pin is arranged on the output transmission member, two second pins are matched with the notch grooves on both sides of the double notch component to drive the double notch component to rotate.

[0010] Optionally, an indication shaft assembly is further included, the indication shaft assembly is connected with the connecting rod mechanism, when the operation assembly of either side acts, the indication shaft assembly rotates synchronously to display the position state of the switch.

[0011] Optionally, the indication shaft assembly comprises an indication shaft and an indication label arranged on one end of the indication shaft, the indication label is provided with position marks, and the other end of the indication shaft is connected with the connecting rod mechanism.

[0012] Optionally, the indication shaft assembly further comprises an eccentric cam and a first micro switch, the eccentric cam is fixed on the indication shaft, and the indication shaft drives the eccentric cam to rotate to press the first micro switch to output a position electric signal.

[0013] Optionally, an interlocking plate is further included, one end of the interlocking plate is connected with the indication shaft assembly, the indication shaft assembly drives the interlocking plate to move between the operation shaft of the isolation operation assembly and the operation shaft of the grounding operation assembly when the indication shaft assembly rotates, so as to realize the shielding and locking of the operation shaft of one side.

[0014] Optionally, a flashlight switching device is further included, the flashlight switching device comprises a swing arm and a second micro switch, the swing arm is pressed when the manual operation handle is inserted into the operation shaft, and the swing arm triggers the second micro switch to output a manual operation mode signal.

[0015] Optionally, the frame structure comprises a fixed front plate, a fixed rear plate and a support column arranged between the fixed front plate and the fixed rear plate.

[0016] The application further provides an electrical cabinet comprising the integrated three-position isolation grounding switch mechanism.

[0017] Compared with the prior art, the present application has at least the following technical effects: The present application realizes the simultaneous completion of isolation operation and grounding operation functions in a single module by symmetrically arranging the isolation operation assembly and the grounding operation assembly on the frame structure and connecting the two operation assemblies through the spring energy storage assembly, solves the problems of low function integration, complex structure and large space occupation of the prior art. The over dead point spring rapid energy release mechanism is adopted, when the operating shaft rotates to make the first pin and the spring shaft center three points collinear and pass the dead point, the spring instantaneously releases energy to drive the output transmission member to rapidly rotate, the action speed is fast, and the risk of arc breakdown in the process of separation and combination can be effectively reduced. The symmetrical design makes the mechanical structures of the isolation operation assembly and the grounding operation assembly completely the same, ensures that the action characteristics of both sides are consistent, and the performance is stable and reliable.

[0018] In addition, by arranging the dynamic sealing assembly, the second pin on the output transmission member matches the notch groove of the double notch component respectively, drives the double notch component to rotate, and then drives the dynamic sealing action through the connecting rod mechanism, efficient power transmission is realized. By arranging the indicating shaft assembly, when the operation assembly acts, the indicating shaft rotates synchronously, the indicating label displays the switch position state in real time, the eccentric cam presses the first micro switch to output the position electric signal, and double position feedback of mechanical indication and electric signal is realized. By arranging the interlocking plate, when one side operation assembly acts, the interlocking plate moves to block the operation shaft of the other side, forming mechanical interlocking protection, effectively preventing misoperation. By arranging the hand and electric switching device, when the manual operation handle is inserted into the operation shaft, the electric operation circuit is automatically cut off, ensuring that manual operation is preferred, avoiding hand and electric operation conflict, and improving operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic diagram of the integrated three-position isolation grounding switch mechanism in the embodiment of the present application. Figure 2 It is a rear view of the integrated three-position isolation grounding switch mechanism in the embodiment of the present application. Figure 3 It is a bottom view of the integrated three-position isolation grounding switch mechanism in the embodiment of the present application. Figure 4 It is a structure schematic diagram of the operation assembly, spring energy storage assembly and dynamic sealing assembly in the embodiment of the present application. Figure 1 Figure 5 It is a structure schematic diagram of the operation assembly, spring energy storage assembly and dynamic sealing assembly in the embodiment of the present application. Figure 2 Figure 6 It is a structure schematic diagram of the operation assembly in the embodiment of the present application. Figure 7 It is a structure schematic diagram of the dynamic sealing assembly in the embodiment of the present application. ​​Figure 8 Figure is a schematic diagram of a double gap component structure in the embodiment of the present application.

[0020] In the figure, 1, fixed front plate; 2, fixed rear plate; 3, support column; 4, operating shaft; 5, input transmission member; 6, intermediate transmission member; 7, output transmission member; 8, first pin; 9, second pin; 10, double gap component; 11, connecting rod mechanism; 12, dynamic seal; 13, indicating shaft; 14, indicating label; 15, eccentric cam; 16, first micro switch; 17, interlocking plate; 18, spring. DETAILED DESCRIPTION

[0021] The following description of an electrical cabinet and an integrated three-position isolation grounding switch mechanism thereof of the present application is made with reference to the accompanying drawings, of which a preferred embodiment of the present application is illustrated. It should be understood that modifications that are within the scope of the present application can be resorted to by those skilled in the art, while the overall functionality remains the same. Accordingly, the following description should be taken as illustrative in nature rather than as limiting.

[0022] Based on the teachings of the specification, those skilled in the art will appreciate that modifications to the described embodiments can be made without departing from the scope of the present application. Such modifications are intended to fall within the scope of the appended claims.

[0023] The present application is described more fully hereinafter with reference to the accompanying drawings, in which one or more embodiments of the application are shown. Like numbers refer to like elements throughout. The present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0024] Embodiment One The present application provides an integrated three-position isolation grounding switch mechanism, please refer to Figure 1 - Figure 3 , comprising: a frame structure, an isolation operating assembly, a grounding operating assembly and a spring energy storage assembly.

[0025] The frame structure is used to support various components of the entire switch mechanism, providing a stable installation base. The frame structure includes a fixed front plate 1, a fixed rear plate 2 and a support column 3 arranged between the fixed front plate 1 and the fixed rear plate 2. The fixed front plate 1 and the fixed rear plate 2 are connected by the support column 3 to form a stable frame space, and each functional component is installed on the frame structure. The number of support columns 3 can be set according to actual needs, usually 2-4, to ensure the rigidity and stability of the frame. The fixed front plate 1 and the fixed rear plate 2 are provided with corresponding mounting holes and bearing seats for mounting the operating shafts 4 of the operating assemblies. The metal material has sufficient strength.

[0026] The isolation operation component and the grounding operation component are symmetrically arranged on the frame structure. This ensures complete consistency between the operation components on both sides in terms of mechanical structure, operating characteristics, and performance parameters, thereby solving the problem of performance differences caused by structural asymmetry in the prior art.

[0027] Both the isolation operation component and the grounding operation component include an operation shaft 4, an input transmission component 5, an output transmission component 7, and an intermediate transmission component 6. The input transmission component 5 is fixed on the operation shaft 4, and the intermediate transmission component 6 is disposed between the input transmission component 5 and the output transmission component 7. The intermediate transmission component 6 is provided with a first pin 8.

[0028] The spring energy storage component includes a spring 18, with the two ends of the spring 18 connected to the first pin 8 of the isolation operation component and the grounding operation component, respectively. When the operation shaft 4 on either side rotates, the first pin 8 on that side moves to store energy in the spring 18. When the first pins 8 on both sides are collinear with the axis of the spring 18 and pass the dead point, the spring 18 releases energy to drive the output transmission component 7 on that side to rotate.

[0029] In this embodiment, by adopting a symmetrical dual-operation component and a spring energy storage component, the present invention achieves the integration of isolation and grounding functions within a single module, while ensuring the speed and reliability of the operation.

[0030] For details, please refer to Figure 4 - Figure 6 Both the isolation operation component and the grounding operation component include an operation shaft 4, an input transmission component 5, an output transmission component 7, and an intermediate transmission component 6. The two operation components adopt identical structural design and configuration, ensuring that the action speed and mechanical characteristics of the isolation and grounding operations are completely consistent, avoiding performance instability caused by structural differences; secondly, it simplifies the types of components, facilitating standardized production and maintenance; and thirdly, it reduces design and manufacturing costs.

[0031] Taking any one of the operating components as an example, the input transmission component 5 is fixed to the operating shaft 4. The operating shaft 4 is a cylindrical shaft with one end extending outside the frame structure to receive manual or electric driving force. The input transmission component 5 can be fixed to the operating shaft 4 by key connection, pin connection, or fasteners, and rotates synchronously with the operating shaft 4. The input transmission component 5 can adopt a disc-shaped structure, or it can adopt other structural forms suitable for transmitting rotation, such as gears or sector plates. In a specific example, the input transmission component 5 is an input disk, which is fixedly connected to the operating shaft 4. When the operating shaft 4 rotates, the input disk rotates synchronously.

[0032] Further, the intermediate transmission member 6 is arranged between the input transmission member 5 and the output transmission member 7. The intermediate transmission member 6 is provided with a first pin 8. The intermediate transmission member 6 can adopt a U-shaped driving pipe wall structure, which has sufficient strength and rigidity. The first pin 8 is fixed on the intermediate transmission member 6, and the first pin 8 is connected with a spring 18. The intermediate transmission member 6 is mechanically connected with the input transmission member 5, and when the input transmission member 5 rotates, the intermediate transmission member 6 is driven to rotate synchronously, so that the first pin 8 moves.

[0033] The output transmission member 7 is used to output power to a subsequent transmission mechanism. When the first pin 8 rotates, the output transmission member 7 is driven to rotate. The output transmission member 7 can adopt a disc-shaped, fan-shaped or other suitable structure for outputting rotation. The output transmission member 7 and the intermediate transmission member 6 achieve power transmission through the first pin 8, and when the first pin 8 moves rapidly under the action of the spring 18, the output transmission member 7 is pushed to rotate rapidly, so as to realize the rapid action of the switch.

[0034] Further, the spring energy storage assembly includes the spring 18, and two ends of the spring 18 are connected with the first pin 8 of the isolation operation assembly and the grounding operation assembly respectively. This connection mode makes a single spring 18 serve two operation assemblies at the same time, realizes high integration of the structure, and simultaneously realizes the isolation operation and the grounding operation functions in one module.

[0035] Specifically, the spring 18 can adopt a tensile spring 18, a torsional spring 18 or a compression spring 18.

[0036] In a specific example, the two ends of the spring 18 are connected with the first pin 8 of the isolation operation assembly and the first pin 8 of the grounding operation assembly respectively. The axial center position of the spring 18 is relatively fixed, and can be positioned through a support installed on the frame structure.

[0037] When the operation shaft 4 on any side rotates, the first pin 8 on the side moves to make the spring 18 store energy. The specific working process is as follows: When the isolation side operation shaft 4 rotates, the input transmission member 5 on the isolation side rotates with the operation shaft 4, drives the intermediate transmission member 6 to rotate, and makes the first pin 8 on the isolation side move along an arc trajectory. Since one end of the spring 18 is connected with the first pin 8 and the other end is connected with the first pin 8 on the grounding side, the first pin 8 on the grounding side is relatively fixed at this time and does not act, so the spring 18 is stretched or compressed, and stores mechanical energy in the spring 18. With the continuous rotation of the operation shaft 4 on the isolation side, the energy storage capacity of the spring 18 gradually increases.

[0038] When the first pin 8 on both sides and the axial center of the spring 18 are collinear and pass through the dead point, the spring 18 releases energy to drive the first pin 8 on the side to drive the output transmission member 7 to rotate.

[0039] In this embodiment, when the first pin 8, the spring 18 axis, and the opposite first pin 8 are collinear, the over dead point state is formed, and the energy storage of the spring 18 reaches the maximum value at this time. After passing the dead point, the elastic potential energy of the spring 18 is instantaneously converted into kinetic energy, and the output transmission member 7 is quickly pushed to rotate by the first pin 8. This rapid energy release mechanism enables the switch contact to complete the on-off action in a very short time, greatly reducing the arc duration time during the on-off process, thereby significantly reducing the risk of arc breakdown.

[0040] Secondly, the operating torque gradually increases when approaching the dead point position, and the energy is stored; after passing the dead point, the spring 18 automatically completes the subsequent action without the need for continuous external force. This torque characteristic meets the needs of switch operation, ensuring sufficient energy storage and automatic rapid energy release.

[0041] Thirdly, the structure is compact. Compared with the traditional scheme of using a large spring 18 and a complex cam mechanism, the present application uses a single spring 18 in cooperation with the over dead point mechanism, reducing the number of parts and the volume, and improving the reliability.

[0042] Further, please refer to Figure 7 - Figure 8 , the integrated three-position isolation grounding switch mechanism further comprises a dynamic sealing assembly, and the dynamic sealing assembly comprises a double-notch component 10, a connecting rod mechanism 11 and a dynamic seal 12. The function of the dynamic sealing assembly is to convert the rotary motion of the output transmission member 7 into a linear or oscillating motion suitable for driving the switch contact.

[0043] The double-notch component 10 cooperates with the output transmission member 7. The double-notch component 10 is a rotating plate with two-sided notched grooves and can rotate around its central axis. The output transmission member 7 is provided with a second pin 9, and the two second pins 9 cooperate with the two-sided notched grooves of the double-notch component 10 to drive the double-notch component 10 to rotate, respectively.

[0044] The specific cooperation relationship is that the output transmission member 7 on the isolation side and the grounding side is respectively provided with a second pin 9, and the two second pins 9 correspond to the two-sided notched grooves of the double-notch component 10.

[0045] In a specific example, the notched groove can be a butterfly-shaped groove, which is convenient for the introduction and pressing of the second pin 9.

[0046] When the output transmission member 7 on the isolation side rotates quickly, the second pin 9 thereon is pressed into the notched groove on one side of the double-notch component 10, pushing the double-notch component 10 to rotate in one direction; when the output transmission member 7 on the grounding side rotates quickly, the second pin 9 thereon is pressed into the notched groove on the other side of the double-notch component 10, pushing the double-notch component 10 to rotate in the opposite direction. Two-way driving is achieved, enabling a single double-notch component 10 to respond to the actions of the two-sided operation assemblies.

[0047] The two ends of the connecting rod mechanism 11 are connected with the double- notch component 10 and the dynamic seal 12 respectively. In one specific example, the connecting rod mechanism 11 can adopt a same-direction four-bar linkage mechanism which can convert the swing rotation of the double- notch component 10 into the same-direction rotation or swing of the dynamic seal 12.

[0048] In one specific example, the same-direction four-bar linkage mechanism is formed by four links, one of which is fixed on the frame as a rack, and the other three are movable links. The double- notch component 10 is connected with one of the driving links, and the dynamic seal 12 is connected with one of the driven links. Through the transmission of the connecting rod, when the double- notch component 10 rotates, the dynamic seal 12 moves according to the set motion law.

[0049] In one specific example, the dynamic seal 12 is mechanically connected with the switch contact to transmit the final driving force to the contact and realize the opening and closing action of the contact. The dynamic seal transmission mechanism is a common means for those skilled in the art, and will not be described here.

[0050] In this embodiment, through the arrangement of the dynamic seal assembly, the energy released by the spring energy storage assembly is effectively transmitted to the switch contact, realizing the complete transmission chain from operation input to contact action.

[0051] Further, the integrated three-position isolation grounding switch mechanism further comprises an indicating shaft assembly connected with the connecting rod mechanism 11, which rotates synchronously to display the switch position state when any side operation assembly acts. The indicating shaft assembly realizes real-time visual display and electrical signal feedback of the switch state, and is an important auxiliary device to ensure safe operation of the switch.

[0052] The indicating shaft assembly comprises an indicating shaft 13 and an indicating label 14 arranged at one end of the indicating shaft 13, and the indicating label 14 is provided with position identification, and the other end of the indicating shaft 13 is connected with the connecting rod mechanism 11.

[0053] In one specific example, the indicating shaft 13 is a rotating shaft, one end of which extends out of the frame structure, and the other end is rigidly connected with a certain link in the connecting rod mechanism 11 or connected through a gear, chain wheel or other transmission mechanism. When the connecting rod mechanism 11 acts, the indicating shaft 13 rotates synchronously.

[0054] The indicating label 14 is fixed at the end of the indicating shaft 13 extending out, which can adopt a pointer type, disc type or other visual form. The position identification includes symbols or words representing the current state of the switch, In one specific example, the intermediate position is marked as OFF, indicating that the switch is in the open state, and neither the isolation side nor the grounding side is closed; the closed position is marked as ON, indicating that the isolation side is closed, and the system is in the normal power supply state; the grounding position is marked as EARTH or a grounding symbol, indicating that the grounding side is closed, and the system is in the grounding state.

[0055] In one specific example, the indication label 14 is a sector plate, and the plate surface is engraved with the marks of the three positions. When the indication shaft 13 rotates, the sector plate rotates, and the current position mark can be observed through the observation window fixed on the frame.

[0056] Further, the indication shaft assembly further comprises an eccentric cam 15 and a first micro switch 16. The eccentric cam 15 is fixed on the indication shaft 13, and the indication shaft 13 drives the eccentric cam 15 to rotate and press the first micro switch 16 to output a position electrical signal. This design realizes the conversion of mechanical position and electrical signal, facilitating remote monitoring and system interlocking protection.

[0057] In one specific example, the eccentric cam 15 is a disc-shaped or other-shaped cam, and the rotation center thereof is offset from the geometric center. Therefore, the distance between the cam edge and the first micro switch 16 changes periodically during rotation. The first micro switch 16 is symmetrically arranged around the indication shaft 13, and usually 2-3 first micro switches 16 are arranged, corresponding to the three positions. In one specific example, two first micro switches 16 are symmetrically arranged. When the indication shaft 13 is in a certain position, the eccentric cam 15 presses the corresponding first micro switch 16 to make the first micro switch 16 closed and output an electrical signal; the first micro switches 16 at other positions are in an open state. By detecting which first micro switch 16 is closed, the current position of the switch can be accurately determined.

[0058] These electrical signals can be connected to a monitoring system, a protection system or an interlocking control system to realize the following functions: remote monitoring of the switch state, the switch position can be understood in the control room; interlocking with other equipment, for example, only when the switch is in the OFF position, the cabinet door can be opened, or only when the switch is in the EARTH position, maintenance work can be carried out; recording the switch operation history for fault analysis and maintenance management.

[0059] Further, the present application provides multiple safety protection mechanisms to ensure that the isolation operation and the grounding operation cannot be performed at the same time, effectively preventing misoperation.

[0060] Firstly, the isolation operation assembly and the grounding operation assembly are naturally mechanically interlocked by the common spring 18 and the transmission mechanism. When the isolation side is operated, the first pin 8 of the isolation side drives the spring 18 to move, at this time, the first pin 8 of the grounding side is subjected to the reverse force of the spring 18, if trying to operate the grounding side at the same time, the reverse force of the spring 18 and the energy stored by the isolation side need to be overcome, in fact, the simultaneous operation cannot be implemented. In addition, when the output transmission member 7 of one side rotates and drives the double-aperture component 10, the position of the double-aperture component 10 has been changed, the second pin 9 of the other side cannot effectively press into the aperture slot of the opposite side, thereby mechanically preventing the simultaneous operation. This natural interlocking formed by mechanical interference does not need additional locking mechanism, and the structure is simple and reliable.

[0061] Secondly, the interlocking plate 17 is further included as a second security protection. One end of the interlocking plate 17 is connected with the indicating shaft assembly, when the indicating shaft assembly rotates, the interlocking plate 17 is driven to move between the operation shaft 4 of the isolation operation assembly and the operation shaft 4 of the grounding operation assembly, so as to shield and lock the operation shaft 4 of one side.

[0062] The interlocking plate 17 is a shielding component in the form of a plate or a frame, which can slide or swing between the operation shaft 4 of the isolation side and the operation shaft 4 of the grounding side. One end of the interlocking plate 17 is connected with the indicating shaft assembly through a connecting rod, a pin shaft or other connecting members, when the indicating shaft 13 rotates, the interlocking plate 17 is driven to move through the connecting mechanism.

[0063] When the switch is in the middle position, i.e. the OFF position, the interlocking plate 17 is located in the middle position, the operation ends of the operation shaft 4 of the isolation side and the operation shaft 4 of the grounding side are exposed, and both sides can be operated. When the operator rotates the operation shaft 4 of the isolation side to perform the isolation side closing operation, the indicating shaft 13 is rotated to the ON position with the switch, the rotation of the indicating shaft 13 drives the interlocking plate 17 to move to the grounding side through the connecting mechanism, the interlocking plate 17 shields the operation end of the operation shaft 4 of the grounding side, so that the operation shaft 4 of the grounding side cannot be driven by the handle or the motor, thereby locking the grounding side operation. Conversely, when the operator rotates the operation shaft 4 of the grounding side to perform the grounding side closing operation, the indicating shaft 13 is rotated to the EARTH position, the interlocking plate 17 moves to the isolation side, and shields and locks the operation shaft 4 of the isolation side.

[0064] In the embodiment, the interlocking plate 17 mechanism provides physical isolation protection, even if the operator tries to forcibly operate the other side, the operation end is shielded and cannot be implemented; as a second security protection, the mechanical interlocking forms double protection with the aforementioned mechanical interlocking, and further improves the safety; the position of the interlocking plate 17 strictly corresponds to the state of the switch, and has an intuitive mechanical indication effect.

[0065] Further, the integrated three-position isolating grounding switch mechanism further comprises a manual-electric switching device, which comprises a swing arm and a second micro switch. When the handle is inserted into the operating shaft 4, the swing arm is pressed, and the swing arm triggers the second micro switch to output a manual operation mode signal.

[0066] In the embodiment, the manual-electric switching device realizes automatic identification and switching of manual operation and electric operation, avoids manual-electric operation conflict, and improves operation safety.

[0067] The outer end of the operating shaft 4 is provided with a handle insertion hole or a plug-in structure. When manually operating, the operator inserts a special handle into the hole. When the handle is inserted, the sleeve part or other protruding part of the handle will contact and press the swing arm. The swing arm is a lever structure that can rotate around a fulcrum. One end of the swing arm is arranged on the handle insertion path, and the other end is close to the trigger button of the second micro switch. When the swing arm is pressed, the swing arm rotates around the fulcrum, and the other end of the swing arm presses the button of the second micro switch, so that the second micro switch operates and outputs a manual operation mode signal.

[0068] The signal can be connected to the control circuit to realize the following functions: when the manual operation mode signal is detected, the power supply or control signal of the electric operation circuit is automatically cut off, so that the motor cannot be started, and manual operation is ensured; the current manual operation mode is indicated on the control panel to remind the operator; the operation mode switching event is recorded for operation management.

[0069] When the handle is pulled out, the swing arm returns to the original position under the action of the reset spring or its own gravity, the second micro switch is reset, the manual operation mode signal disappears, and the electric operation circuit returns to normal. This automatic switching mechanism does not require the operator to manually switch the switch or change the key, simplifying the operation process and avoiding operation errors caused by forgetting to switch the mode.

[0070] Further, in a specific example, the working process of the entire switch mechanism is described below by taking the closing operation of the isolating side as an example. Initial state: the switch is in the middle position (OFF state), the isolating side and the grounding side are in the open state, the indicator label 14 displays OFF, the interlocking plate 17 is in the middle position, and both sides of the operating shaft 4 can be operated.

[0071] S1: The operator inserts the handle into the isolating side operating shaft 4 or starts the motor to drive the isolating side operating shaft 4. When the handle is inserted, the swing arm is pressed, the second micro switch is triggered, and a manual operation mode signal is output, and the electric operation circuit is cut off.

[0072] S2: The operator rotates the handle, and the isolation side operating shaft 4 starts to rotate. The isolation side input transmission member 5 rotates synchronously with the operating shaft 4, drives the intermediate transmission member 6 to rotate, and makes the first pin 8 of the isolation side move along a circular arc trajectory.

[0073] S3: The movement of the first pin 8 compresses the spring 18, and the spring 18 starts to store energy. As the operating shaft 4 continues to rotate, the energy stored by the spring 18 gradually increases, and the operating torque gradually increases.

[0074] S4: When the first pin 8 of the isolation side, the axis of the spring 18, and the first pin 8 of the grounding side are collinear, the dead point position is reached. At this time, the energy stored by the spring 18 reaches the maximum value, and the operating torque also reaches the peak value.

[0075] S5: Continue to rotate the operating shaft 4 to pass the dead point. At this time, the spring 18 instantaneously releases the stored energy, quickly pushes the output transmission member 7 to rotate through the first pin 8, and the output transmission member 7 completes the rapid rotation.

[0076] S6: The second pin 9 on the output transmission member 7 is pressed into the notch groove on one side of the double-notch component 10, and the double-notch component 10 is driven to rotate. The double-notch component 10 drives the dynamic seal 12 to rotate through the same-direction four-bar linkage mechanism, the dynamic seal 12 drives the isolation switch contact to quickly close, and the closing operation is completed.

[0077] S7: At the same time, the rotation of the double-notch component 10 drives the indication shaft 13 to rotate to the ON position through the linkage mechanism 11, the indication label 14 displays ON, indicating that the isolation side has been closed. The eccentric cam 15 presses the corresponding first micro switch 16, outputs the ON position electrical signal, and feeds back to the control system.

[0078] S8: The rotation of the indication shaft 13 drives the interlocking plate 17 to move towards the grounding side, the interlocking plate 17 blocks the operating end of the grounding side operating shaft 4, locks the grounding side, and prevents misoperation.

[0079] The closing and opening operations of the grounding side are completely similar to those of the isolation side, except that the other side of the double-notch component 10 and the grounding switch contact are driven, the rotation direction of the indication shaft 13 is opposite, and the interlocking plate 17 moves to the isolation side to lock the isolation side operating shaft 4.

[0080] In addition, in another specific example, the spring 18 can adopt a parallel or series connection of double springs to provide greater energy storage capacity or more ideal mechanical properties.

[0081] In another specific example, the indication shaft assembly can be additionally provided with a mechanical counter to record the number of switch operations, which is used for maintenance management and life evaluation.

[0082] In another specific example, the frame structure is designed as a modular structure, and each functional component is installed on an independent module frame, and the modules are connected through standardized interfaces, facilitating transportation, installation and maintenance.

[0083] The integrated three-position isolation grounding switch mechanism provided in the embodiment realizes both isolation operation and grounding operation in a single module through the design of symmetric double operation components and shared spring energy storage components, solves the technical problem that the prior art is difficult to realize both functions in one module, and has compact structure, saves valuable installation space in the cabinet, and reduces the overall volume and cost of the electrical cabinet.

[0084] The integrated three-position isolation grounding switch mechanism provided in the embodiment has fast and reliable action, adopts an over dead point rapid energy release mechanism, and releases energy instantaneously after spring energy storage, so that the switch contacts complete the opening and closing action in a very short time. The arc duration is significantly shortened during opening and closing, the risk of arc breakdown is greatly reduced, and the electrical life and operation safety of the switch are improved. The torque characteristics of the over dead point mechanism optimize the operation feel, the operation force is stable during the energy storage stage, and the operation is automatically completed after passing the dead point, so that the operation is easy and convenient.

[0085] The isolation operation component and the grounding operation component adopt completely symmetric structure design, and the mechanical structure, spring configuration and transmission mode are completely the same, so that the action speed, action torque and mechanical characteristics of the two sides are completely consistent. The problem of performance difference caused by asymmetric structure in the prior art is solved, the switch performance is stable and reliable, the fault risk caused by inconsistent performance is reduced, the types of parts are simplified, standardized production is facilitated, and the manufacturing cost and maintenance difficulty are reduced.

[0086] Mechanical interlocking, interlocking plate protection, hand and electric switching and other multiple safety mechanisms are also provided to form a three-dimensional safety protection system. The mechanical interlocking fundamentally prevents simultaneous isolation and grounding operation through the natural interference of the shared spring and transmission mechanism; the interlocking plate mechanism provides physical shielding as a second protection; and the hand and electric switching device automatically identifies the operation mode to avoid hand and electric conflicts. Multiple protections ensure that even if one line of defense fails, other mechanisms will still guarantee safety, effectively preventing misoperation and protecting personal and equipment safety.

[0087] The indicating shaft assembly provides mechanical position indication and electrical signal feedback at the same time to realize double position confirmation. The indicating label directly and intuitively displays the current position, and the eccentric cam cooperates with the first micro switch to output an electrical signal, realizing remote monitoring, interlocking protection and operation recording. The mechanical and electrical combined display mode improves the accuracy and reliability of state identification, and meets the requirements of modern electrical systems for monitoring and automation.

[0088] In addition, each functional component adopts a modular design, with clear structure, easy assembly and disassembly. Standardized interfaces and universal components reduce the types of spare parts and maintenance costs.

[0089] Embodiment Two The electrical cabinet of the present embodiment applies the integrated three-position isolation grounding switch mechanism of Embodiment One.

[0090] The electrical cabinet comprises a cabinet body, a busbar system, a load switch or circuit breaker, and an integrated three-position isolation grounding switch mechanism as described in Embodiment One.

[0091] The cabinet body is of a metal-enclosed structure, with internal functional partitions such as a busbar room, a switch room, and a cable room. The integrated three-position isolation grounding switch mechanism is installed in the switch room, with its frame structure fixed to the mounting plate or support structure of the cabinet body.

[0092] The operating shaft 4 of the integrated three-position isolation grounding switch mechanism extends out of the front panel of the cabinet body, and the operator can use the handle to perform manual operation through the operating hole on the front panel, or perform electric operation through the motor installed in the cabinet body. The indication label 14 is provided on the front panel, facilitating the operator to observe the switch state. The position electric signal output by the first micro switch 16 is connected to the secondary control circuit of the electrical cabinet, realizing interlocking protection with other equipment and remote monitoring.

[0093] By applying the integrated three-position isolation grounding switch mechanism of the present application in the electrical cabinet, the isolation and grounding operations are completed in a single module, simplifying the internal structure of the electrical cabinet, reducing the installation space, and improving the integration and reliability of the electrical cabinet. Compared with the traditional electrical cabinet using discrete isolation switches and grounding switches, the electrical cabinet of the present embodiment is smaller in size, lower in cost, more convenient to operate, and higher in safety.

[0094] In addition, the electrical cabinet of the present embodiment can be widely applied in medium-voltage power distribution systems, ring main units, switching stations, substations, and other places, and is suitable for various power consumption scenarios such as power, industrial and mining enterprises, rail transit, and construction.

[0095] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An integrated three-position isolating grounding switch mechanism, characterized in that, include: Framework structure; An isolation operation component and a grounding operation component are symmetrically arranged on the frame structure; Both the isolation operation component and the grounding operation component include an operation shaft, an input transmission component, an output transmission component, and an intermediate transmission component. The input transmission component is fixed on the operation shaft, and the intermediate transmission component is disposed between the input transmission component and the output transmission component. A first pin is provided on the intermediate transmission component. A spring energy storage assembly includes a spring, the two ends of which are respectively connected to the first pins of the isolation operation assembly and the grounding operation assembly. When the operation shaft on either side rotates, the first pin on that side moves to store energy in the spring. When the first pins on both sides are collinear with the spring axis and pass the dead point, the spring releases energy to drive the output transmission component on that side to rotate.

2. The integrated three-position isolating grounding switch mechanism according to claim 1, characterized in that, It also includes a dynamic sealing assembly, which comprises a double-notch component, a linkage mechanism, and a dynamic seal. The double-notch component cooperates with the output transmission component, and the two ends of the linkage mechanism are respectively connected to the double-notch component and the dynamic seal.

3. The integrated three-position isolating grounding switch mechanism according to claim 2, characterized in that, The output transmission component is provided with a second pin, and the two second pins respectively cooperate with the notch grooves on both sides of the double notch component to drive the double notch component to rotate.

4. The integrated three-position isolating grounding switch mechanism according to claim 2, characterized in that, It also includes an indicator shaft assembly, which is connected to the linkage mechanism. When either side of the operating component is activated, the indicator shaft assembly rotates synchronously to indicate the switch position status.

5. The integrated three-position isolating grounding switch mechanism according to claim 4, characterized in that, The indicator shaft assembly includes an indicator shaft and an indicator label disposed at one end of the indicator shaft. The indicator label is provided with a position mark, and the other end of the indicator shaft is connected to the linkage mechanism.

6. The integrated three-position isolating grounding switch mechanism according to claim 5, characterized in that, The indicator shaft assembly also includes an eccentric cam and a first micro switch. The eccentric cam is fixed on the indicator shaft. When the indicator shaft drives the eccentric cam to rotate, it presses the first micro switch and outputs a position electrical signal.

7. The integrated three-position isolating grounding switch mechanism according to claim 4, characterized in that, It also includes an interlocking plate, one end of which is connected to the indicator shaft assembly. When the indicator shaft assembly rotates, it drives the interlocking plate to move between the operating shaft of the isolation operation assembly and the operating shaft of the grounding operation assembly, so as to achieve blocking and locking of one side of the operating shaft.

8. The integrated three-position isolating grounding switch mechanism according to claim 1, characterized in that, It also includes a flashlight switching device, which includes a swing arm and a second micro switch. When the manual operation handle is inserted into the operating shaft, the swing arm is pressed, and the swing arm triggers the second micro switch to output a manual operation mode signal.

9. The integrated three-position isolating grounding switch mechanism according to claim 1, characterized in that, The frame structure includes a fixed front plate, a fixed rear plate, and a support column disposed between the fixed front plate and the fixed rear plate.

10. An electrical cabinet, characterized in that, Includes the integrated three-position isolating grounding switch mechanism as described in any one of claims 1-9.

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