Mechanism sealing five-prevention interlocking device
The mechanical structure design of the five-proof interlocking device with sealing mechanism solves the problems of high cost and complex operation of switchgear safety protection, improves safety and reliability, and simplifies the maintenance process.
Patent Information
- Application Number
- CN202423288493.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing safety protection solutions for switchgear are costly and complex to operate, making it difficult to effectively prevent misoperation and personal injury.
The mechanism employs a mechanical structure design including hooks, pins, and sliders to create a five-proof interlocking device that ensures the operation of the switch under specific conditions. This device utilizes the coordination of components such as the main body of the mechanism box, support plate, isolation cam, and cable compartment interlocking cam to achieve the five-proof interlocking function.
It reduces costs, improves operational safety and reliability, simplifies maintenance, prevents misoperation, and ensures the safety of equipment and personnel.
Smart Images
Figure CN223757407U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high -tension switchgear technical field, concretely is a mechanism seal five -prevention interlock device. BACKGROUND
[0002] The specific requirement of five -prevention is: prevent taking load and opening disconnecting switch, prevent mistake and mistake closing circuit breaker, load switch, contactor, prevent closing circuit breaker and load switch when grounding switch is in closed position, prevent mistake closing grounding switch when electrifying, prevent mistake entering electrifying compartment.
[0003] At present, aiming at the safety protection of switch cabinet, there are two main structure design schemes:
[0004] The first scheme involves assembling position sensor on the disconnecting switch to ensure that the power supply of vacuum contactor can be cut off in advance when the disconnecting switch is opened. In addition, high -voltage electric indicator and electromagnetic lock can be installed on the door panel of switch cabinet. When there is high voltage in the cabinet, the indicator will light up to warn that there is electricity, and the electromagnetic lock will be automatically locked to prevent the cabinet door from being opened. However, the deficiency of this design is that the cost is high, and the indicator and electromagnetic lock need to be installed on the cabinet door. Especially when the cabinet door is opened, because the electromagnetic lock is invalid, additional measures are needed to lock the disconnecting switch to prevent it from closing.
[0005] The second scheme is to control the opening and closing operation of vacuum contactor through change-over switch, for example, using the widely used LWR type change-over switch in the industry, and realizing the control of operation sequence through program lock. The disadvantage of this design is that it does not allow direct operation of vacuum contactor by using button, and program lock also needs to be opened on the cabinet door, resulting in complex operation process and relatively high overall cost.
[0006] Although the above two schemes can improve the safety of switch cabinet, they have certain limitations, including high cost and complex operation process. Therefore, we need to propose a mechanism seal five -prevention interlock device. UTILITY MODEL CONTENT
[0007] The utility model aims at providing a mechanism seal five -prevention interlock device, which uses mechanical hook, bolt, slider and other mechanical structures to ensure that the switch can only be operated under certain conditions, has simple structure, low cost, high reliability, good protection, small maintenance workload, convenient operation, ensures operation safety, effectively prevents misoperation, and protects the safety of equipment and personnel, so as to solve the problems in the above background technology.
[0008] In order to achieve the above object, the utility model provides: a mechanism seal five prevent interlock device, including mechanism box main part, the surface of mechanism box main part is equipped with the bracing plate through screw installation, the top of bracing plate is equipped with the isolation switch -on and -off interlocking piece, the surface of bracing plate both sides is equipped with the isolation cam and cable cabin interlocking cam respectively in mechanism box main part, the side of isolation cam is provided with the switch -off shaft spring stop piece, the surface of switch -off shaft spring stop piece is provided with switch -off shaft interlocking mechanism, the switch -off shaft interlocking piece side of switch -off shaft interlocking mechanism is provided with switch -on and -off shaft interlocking piece, the side of cable cabin interlocking cam is provided with cable cabin door spring stop piece, the surface of cable cabin door spring stop piece is provided with cable cabin door interlocking mechanism.
[0009] Preferably, the surface of the isolation switch-on and -off interlocking piece is provided with an oblong hole, and the side of the bracing plate is provided with a copper sleeve, and the copper sleeve is assembled in the oblong hole on the surface of the isolation switch-on and -off interlocking piece.
[0010] Preferably, the surface of the isolation switch-on and -off interlocking piece is provided with an oblong hole, and the side of the bracing plate is provided with a copper sleeve, and the copper sleeve is assembled in the oblong hole on the surface of the isolation switch-on and -off interlocking piece.
[0011] Preferably, the surface of the isolation switch-on and -off interlocking piece is provided with an oblong hole, and the side of the bracing plate is provided with a copper sleeve, and the copper sleeve is assembled in the oblong hole on the surface of the isolation switch-on and -off interlocking piece.
[0012] Preferably, the switch -off shaft interlocking mechanism comprises: a switch -off shaft interlocking piece connected to an end of the switch -off shaft interlocking piece, and a switch -off operation shaft connected to the other end of the switch -off shaft interlocking piece; wherein the switch -off operation shaft is installed on the surface of the mechanism box main part on one side of the switch -off shaft spring stop piece, a spring is sleeved on the surface of the switch -off shaft interlocking piece, and one end of the spring is connected to the surface of the switch -off shaft spring stop piece.
[0013] Preferably, the surface of the isolation switch-on and -off interlocking piece is provided with an oblong hole, and the side of the bracing plate is provided with a copper sleeve, and the copper sleeve is assembled in the oblong hole on the surface of the isolation switch-on and -off interlocking piece.
[0014] Preferably, the cable cabin door interlocking mechanism comprises: a first cable cabin door interlocking piece installed on the surface of the cable cabin door spring stop piece, and a second cable cabin door interlocking piece arranged on one side of the first cable cabin door interlocking piece; wherein one end of the second cable cabin door interlocking piece is connected with a lug, cable cabin springs are installed on the surfaces of the first cable cabin door interlocking piece and the second cable cabin door interlocking piece through cable cabin door interlocking pieces, and one end of the cable cabin spring is connected to the surface of the cable cabin door spring stop piece.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The utility model discloses through the cooperation and setting of mechanism box main part, bracing plate, isolation cam and cable cabin interlocking cam, switching shaft interlocking mechanism and cable cabin door interlocking mechanism etc. structure, effectively avoid the improper operation of the equipment such as operating isolator, misoperation circuit breaker under the closed state of earthing switch, also prevent the mistake from entering the electrified area, thereby the security of operation is improved significantly. The device adopts pure mechanical structure, and the design is simple and efficient, not only reduces the cost, also strengthens the reliability, and has excellent protective performance. In addition, because its simple structure, the maintenance is more convenient, and the operation is more handy. In short, the device improves the operation security and convenience of power system in the economic and practical mode greatly. BRIEF DESCRIPTION OF DRAWINGS
[0017] Fig. 1 It is the whole structure schematic diagram of the utility model;
[0018] Fig. 2 It is the mechanism box main part structure schematic diagram of the utility model;
[0019] Fig. 3 It is the isolation switching-on and -off interlocking piece structure schematic diagram of the utility model.
[0020] In the drawing: 1, mechanism box main part;2, switching shaft spring baffle;3, switching shaft interlocking piece;4, switching shaft interlocking piece;5, spring;6, switching-on and -off shaft interlocking piece;7, switching-on and -off indicating shaft;8, isolation switching-on and -off interlocking piece;9, bracing plate;10, isolation cam;11, copper bushing;12, first cable cabin door interlocking piece;13, second cable cabin door interlocking piece;14, cable cabin door spring baffle;15, cable cabin door interlocking piece;16, cable cabin spring;17, cable cabin interlocking cam;18, earthing cam;19, switching operation shaft;20, closing operation shaft;21, earthing operation shaft;22, isolation operation shaft. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.
[0022] As Figs. 1-3The utility model provides a kind of mechanism seal five-prevent interlocking device, including mechanism box main body 1, the surface of mechanism box main body 1 is equipped with bracing plate 9 by screw, the top of bracing plate 9 is equipped with isolation opening and closing interlocking piece 8, isolation cam 10 and cable cabin interlocking cam 17 are respectively installed on the surface of mechanism box main body 1 in bracing plate 9 two sides;Isolation cam 10 side is provided with opening and closing shaft spring stop piece 2, the surface of opening and closing shaft spring stop piece 2 is provided with opening and closing shaft interlocking mechanism, the side of opening and closing shaft interlocking mechanism opening and closing shaft interlocking piece 3 is provided with opening and closing shaft interlocking piece 6;Cable cabin interlocking cam 17 side is provided with cable cabin door spring stop piece 14, the surface of cable cabin door spring stop piece 14 is provided with cable cabin door interlocking mechanism.
[0023] It is worth mentioning that, by the cooperation of mechanism box main body 1, bracing plate 9, isolation cam 10 and cable cabin interlocking cam 17, opening and closing shaft interlocking mechanism and cable cabin door interlocking mechanism structure, the switch can only be operated under certain conditions, the structure is simple, the cost is low, the reliability is high, the protection is good, the maintenance workload is small, the operation is convenient, the interlocking device ensures the safety of operation, effectively prevents misoperation, and protects the safety of equipment and personnel.
[0024] Specifically, the surface of isolation opening and closing interlocking piece 8 is provided with a long circular hole, one side of bracing plate 9 is provided with a copper sleeve 11, and the copper sleeve 11 is assembled in the long circular hole on the surface of isolation opening and closing interlocking piece 8. One side of bracing plate 9 is installed on the surface of mechanism box main body 1 and is provided with an isolation operating shaft 22, and isolation cam 10 is installed on the surface of isolation operating shaft 22. The other side of bracing plate 9 is installed on the surface of mechanism box main body 1 and is provided with a grounding operating shaft 21, the surface of grounding operating shaft 21 is provided with a grounding cam 18, and cable cabin interlocking cam 17 is installed on the top of grounding cam 18.
[0025] The surface of opening and closing shaft spring stop piece 2 and cable cabin door spring stop piece 14 is provided with an open slot, opening and closing shaft spring stop piece 2 and cable cabin door spring stop piece 14 are connected by screws and threaded holes above mechanism box main body 1, spring 5 is inserted into the narrow end of opening and closing shaft interlocking piece 3, then opening and closing shaft interlocking piece 3 with spring 5 is inserted into the open slot of opening and closing shaft spring stop piece 2, opening and closing shaft interlocking piece 3 is bolted and movably connected with opening and closing shaft interlocking piece 4, the installation of the first part assembly is completed, and cable cabin door spring stop piece 14 is a structure for assembling and installing first cable cabin door interlocking piece 12 and second cable cabin door interlocking piece 13.
[0026] The opening shaft interlocking mechanism comprises an opening shaft interlocking piece 4 connected to the end of the opening shaft interlocking member 3 and an opening operation shaft 19 connected to the other end of the opening shaft interlocking member 3; wherein the opening operation shaft 19 is installed on the surface of the mechanism box body 1 on one side of the opening shaft spring stop piece 2, the surface of the opening shaft interlocking member 3 is sleeved with a spring 5, and one end of the spring 5 is connected to the surface of the opening shaft spring stop piece 2. The opening shaft interlocking piece 4 is installed on the surface of the mechanism box body 1 on one side, and a closing and opening indication shaft 7 is installed on the surface of the mechanism box body 1 on one side. The closing and opening indication shaft 7 is connected with a closing operation shaft 20.
[0027] In addition, the closing and opening shaft interlocking piece 6 is welded with the closing and opening indication shaft 7 and has a positioning plane, the opening shaft interlocking piece is in the initial position when the circuit breaker is in the opening state, and the closing and opening indication shaft 7 rotates clockwise to drive the opening shaft interlocking piece 4 to rotate in parallel after the circuit breaker is closed by operating the closing operation shaft 20. The isolation operation shaft 22 is welded with the isolation cam 10 and has a positioning plane.
[0028] The cable compartment door interlocking mechanism comprises a first cable compartment door interlocking piece 12 installed on the surface of the cable compartment door spring stop piece 14 and a second cable compartment door interlocking piece 13 arranged on one side of the first cable compartment door interlocking piece 12; wherein one end of the second cable compartment door interlocking piece 13 is connected with a lug, the surfaces of the first cable compartment door interlocking piece 12 and the second cable compartment door interlocking piece 13 are respectively installed with cable compartment springs 16 through a cable compartment door interlocking member 15, and one end of the cable compartment spring 16 is connected to the surface of the cable compartment door spring stop piece 14.
[0029] When the circuit breaker is in the open state, the opening and closing shaft interlocking piece 6 is in the upper end position one, and the grounding switch is in the open state, at this time the isolation operation shaft 22 can be operated from open to close or from close to open, and the isolation operation shaft 22 can be reasonably and safely operated to open and close; when the circuit breaker is in the closed state, the opening and closing shaft interlocking piece 6 is in the lower end position two, and the grounding switch is in the open state, at this time the isolation switch cannot be operated whether in the open state or in the closed state, when the isolation switch is in the open state, the isolation cam 10 is in the upper end position one, and when the isolation operation shaft 22 is operated to close, the two short pins on the isolation cam 10 will be blocked by the opening and closing shaft interlocking piece 6 to rotate to the position, so that the closing operation cannot be performed, and when the isolation operation shaft 22 is operated to open, it will also be blocked by the opening and closing shaft interlocking piece 6 to rotate to the position, so that the opening operation cannot be performed; after the isolation operation shaft 22 is operated to open, the isolation cam 10 comes to position one, and a long pin on it pushes the opening shaft interlocking piece 4 upward, and the whole transmission makes the lug of the opening shaft interlocking piece 4 block the plane on the circuit breaker closing operation shaft 20, so that the circuit breaker cannot be closed when the isolation switch is in the open state. This also realizes the first requirement of the five interlocking requirements, that is, to disconnect the vacuum contactor first, and then to disconnect the isolation switch, to prevent the high-voltage arc short circuit caused by disconnecting the isolation switch under load, and to realize simple and efficient operation.
[0030] When the circuit breaker has been opened, at this time the isolation operation shaft 22 can be operated to open and close the isolation switch, when the isolation switch is open, at this time the isolation cam 10 is in position one, if the grounding switch is also in the open state, the grounding cam 18 is in position one, both sides of the cam are short radius one segment facing the isolation opening and closing interlocking piece 8, and there is no contact with it, due to the tension of the two springs, the isolation opening and closing interlocking piece 8 is in the middle position, at this time the isolation operation shaft 22 or the grounding operation shaft 21 can be operated; when the isolation operation shaft 22 is operated to close, the isolation cam 10 comes to position two, and the long radius one segment of the cam pushes the isolation opening and closing interlocking piece 8 to the grounding side, at this time the grounding operation shaft 21 is blocked and cannot be operated to close; when the grounding operation shaft 21 is operated to close, the grounding cam 18 comes to position two, and the long radius one segment of the grounding cam pushes the isolation opening and closing interlocking piece 8 to the isolation side, at this time the isolation operation shaft 22 is blocked and cannot be operated to close.
[0031] On the basis of the operation principle of the first two, when the circuit breaker is opened and the isolating switch is opened, the grounding switch can be operated to be closed, the isolating opening and closing interlocking piece 8 blocks the isolating operation shaft 22 after the grounding switch is closed, the cable cabin interlocking cam 17 short side radius is opposite to the cable cabin door interlocking, the lower end spring is popped up, at this time the cable cabin door can be opened, the second five-proof interlocking is realized.
[0032] When the cabinet door is opened, the cable cabin door interlocking piece is popped up by the action of the cable cabin spring 16, the second cable cabin door interlocking piece 13 lug blocks the grounding operation shaft 21, the isolating switch cannot be operated to be closed because the grounding switch is in the closed state and the opening and closing interlocking piece blocks the isolating operation shaft 22. This also ensures the third five-proof interlocking requirement, the grounding switch cannot be operated and the isolating switch cannot be closed when the cabinet door is opened, avoiding the introduction of high voltage to endanger personal safety.
[0033] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be changed, modified, replaced and varied in many ways without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A mechanism seal five prevention interlocking device, characterized in that, Including mechanism box body (1); The surface of the mechanism box body (1) is provided with a support plate (9) installed by screws, the top of the support plate (9) is provided with an isolation opening and closing interlocking piece (8), and the surface of the mechanism box body (1) on both sides of the support plate (9) is respectively provided with an isolation cam (10) and a cable cabin interlocking cam (17). One side of the isolation cam (10) is provided with a closing shaft spring stop piece (2), the surface of the closing shaft spring stop piece (2) is provided with a closing shaft interlocking mechanism, and one side of the closing shaft interlocking mechanism is provided with a closing and opening shaft interlocking piece (6). One side of the cable cabin interlocking cam (17) is provided with a cable cabin door spring stop piece (14), and the surface of the cable cabin door spring stop piece (14) is provided with a cable cabin door interlocking mechanism.
2. A mechanical sealing five-prevention interlocking device according to claim 1, characterized in that: The surface of the isolation opening and closing interlocking piece (8) is provided with an oblong hole, one side of the support plate (9) is provided with a copper sleeve (11), and the copper sleeve (11) is assembled in the oblong hole in the surface of the isolation opening and closing interlocking piece (8).
3. A mechanical seal five prevention interlocking device according to claim 1, characterized in that: One side of the support plate (9) is provided with an isolation operation shaft (22) on the surface of the mechanism box body (1), and the isolation cam (10) is installed on the surface of the isolation operation shaft (22).
4. A mechanical seal five prevention interlocking device according to claim 3, characterized in that: The other side of the support plate (9) is provided with a grounding operation shaft (21) on the surface of the mechanism box body (1), the surface of the grounding operation shaft (21) is provided with a grounding cam (18), and the cable cabin interlocking cam (17) is installed on the top of the grounding cam (18).
5. A mechanical seal five prevention interlocking device according to claim 1, characterized in that, The closing shaft interlocking mechanism comprises: A closing shaft interlocking piece (4) connected to the end of the closing shaft interlocking piece (3), and A closing operation shaft (19) connected to the other end of the closing shaft interlocking piece (3); Wherein, the closing operation shaft (19) is installed on the surface of the mechanism box body (1) on one side of the closing shaft spring stop piece (2), the surface of the closing shaft interlocking piece (3) is sleeved with a spring (5), and one end of the spring (5) is connected to the surface of the closing shaft spring stop piece (2).
6. A mechanical seal five prevention interlocking device according to claim 5, characterized in that: One side of the closing shaft interlocking piece (4) is provided with a closing and opening indication shaft (7) on the surface of the mechanism box body (1), the closing and opening shaft interlocking piece (6) is installed on the end of the closing and opening indication shaft (7), and the end of the closing and opening indication shaft (7) is connected with a closing operation shaft (20).
7. A mechanical seal five prevention interlocking device according to claim 1, characterized in that: The cable cabin door interlocking mechanism comprises: A first cable cabin door interlocking piece (12) installed on the surface of the cable cabin door spring stop piece (14), and A second cable cabin door interlocking piece (13) provided on one side of the first cable cabin door interlocking piece (12); Wherein, one end of the second cable cabin door interlocking piece (13) is connected with a lug, the surfaces of the first cable cabin door interlocking piece (12) and the second cable cabin door interlocking piece (13) are respectively provided with a cable cabin spring (16) through a cable cabin door interlocking piece (15), and one end of the cable cabin spring (16) is connected to the surface of the cable cabin door spring stop piece (14).