CN114388291A - Double-shaft three-station load switch operating mechanism and method based on shared energy storage spring - Google Patents
Double-shaft three-station load switch operating mechanism and method based on shared energy storage spring Download PDFInfo
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- CN114388291A CN114388291A CN202111649597.9A CN202111649597A CN114388291A CN 114388291 A CN114388291 A CN 114388291A CN 202111649597 A CN202111649597 A CN 202111649597A CN 114388291 A CN114388291 A CN 114388291A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
- H01H21/40—Driving mechanisms having snap action
- H01H21/42—Driving mechanisms having snap action produced by compression or extension of coil spring
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Abstract
The invention provides a double-shaft three-station load switch operating mechanism and method based on a shared energy storage spring, and the mechanism comprises a disconnecting link main shaft assembly, a grounding station operating shaft and a load station operating shaft, wherein the disconnecting link main shaft assembly is respectively connected with the grounding station operating shaft and the load station operating shaft through a driving crank arm assembly, a spring driving crank arm is respectively welded on the grounding station operating shaft and the load station operating shaft, a group of energy storage spring assemblies are arranged between the grounding station operating shaft and the load station operating shaft, and when the grounding station operating shaft or the load station operating shaft is operated and rotated, potential energy is released after effective spring compression to drive the grounding station operating shaft or the load station operating shaft to complete a corresponding mechanical action mode. The invention simplifies the mechanical structure of the two-shaft three-station spring operating mechanism system, effectively reduces the structural volume of the operating system complete set of switch equipment, and ensures that the switch equipment matched with the operating system is simpler to operate, smaller in volume and compact in structure.
Description
Technical Field
The invention relates to the technical field of electrical equipment operating mechanisms, in particular to a double-shaft three-position load switch operating mechanism based on a shared energy storage spring and a control method applied to the mechanism.
Background
In the technical field of load switch equipment commonly used in power distribution systems, a spring is used as a driving energy storage element of an operating mechanism, which is one of the most commonly used general technologies. The specific spring operating mechanism firstly compresses the large-force spring and then releases the spring compression potential energy in a mechanical mode, so that the rapid and stable actions which cannot be achieved by manpower are obtained to realize the operation actions (functions) of the switch knife switch on-load position state, the switch off-load position state or the knife switch grounding position state of the driven operating shaft, and the realization of the action states urgently needs a certain motion average speed and needs stronger running stability, namely the linear driving energy of the kinetic energy is obtained by the motion, and the kinetic energy obtaining mode can be well solved by the release effect of the spring compression energy.
Therefore, when three working positions, namely a load-on working position (a load working position), a load-off working position (an off working position) and a disconnecting link grounding working position (a grounding working position), need to be realized on a disconnecting link main shaft of the equipment, the conventional operating mechanism systems are basically completed in a mode of driving by compressing and releasing energy of a spring.
Meanwhile, because the disconnecting link on the same main shaft needs to be driven in three stations, and because of the limitation of forced driving brought by a mechanical rotating structure, if a two-shaft operating system is also adopted to complete the working state of the main shaft of the disconnecting link in three stations, the single-main-shaft disconnecting link structure seen in the current market all adopts at least two or more compression energy storage springs to realize the compression and release kinetic energy required by the corresponding stations.
However, the main shaft driving mode of the traditional disconnecting link also mostly adopts two shafts or three shafts to meet the requirement of three stations, the corresponding auxiliary mechanical structure is complex, two or more compression energy storage springs are usually needed to meet the requirement, the operation is complex, the structure volume is larger, the structure is not compact enough, and the cost is higher.
Disclosure of Invention
The invention aims to provide a double-shaft three-position load switch operating mechanism based on a shared energy storage spring and a control method thereof, which simplify the mechanical structure of a system of the double-shaft three-position spring operating mechanism to the greatest extent, effectively reduce the structural volume required by a set of switch equipment of a three-position disconnecting link main shaft operating system, and enable the set of combined equipment of the switch equipment matched with the set of switch equipment to be simpler in operation, smaller in volume and compact in structure.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a double-shaft three-position load switch operating mechanism based on a shared energy storage spring comprises: a knife switch main shaft component, a grounding station operating shaft and a loading station operating shaft, wherein the knife switch main shaft component is fixedly connected with a knife switch, the knife switch main shaft assembly is connected with the grounding station operating shaft and the load station operating shaft through a driving crank arm assembly respectively, a spring driving crank arm is respectively welded on the grounding station operating shaft and the load station operating shaft, wherein a group of energy storage spring components are arranged between the grounding station operating shaft and the load station operating shaft, the energy storage spring assembly is fixedly connected to the grounding station operating shaft and the load station operating shaft through a guide pipe connecting pin in a guide pipe pin hole, when the rotary grounding station operating shaft or the load station operating shaft is operated, the potential energy is released after the effective spring compression is obtained to drive the grounding station operating shaft or the load station operating shaft to complete a corresponding mechanical action mode.
A further scheme is, the energy storage spring subassembly include spring little pipe, the big pipe of spring and be used for respectively with ground connection station operating axis two of load station operating axis the pipe pinhole, the little pipe of spring with the cooperation of the big pipe of spring is connected the little pipe of spring is close to in one side of load station operating axis is equipped with the spring guide seat the big pipe of spring is close to in one side of ground connection station operating axis is equipped with the spring holder evenly be provided with a plurality of energy storage big springs on little pipe of spring and the big pipe of spring, and pass through respectively the spring guide seat with the spring holder leads and spacing.
According to a further scheme, a first guide pipe pin hole used for being connected with the load station operating shaft is formed in one side of the small spring guide pipe, a first guide pipe connecting pin used for being fixedly connected with the load station operating shaft is arranged on the first guide pipe pin hole, a second guide pipe pin hole used for being connected with the grounding station operating shaft is formed in one side of the large spring guide pipe, and a second guide pipe connecting pin used for being fixedly connected with the grounding station operating shaft is arranged on the second guide pipe pin hole.
According to a further scheme, the disconnecting link main shaft assembly comprises a disconnecting link main shaft, a driving square sleeve and a driving arm assembly, a main shaft fixing seat is sleeved outside the disconnecting link main shaft, square sleeve shafts are respectively arranged at two ends of the driving arm assembly and are used for being connected with the driving square sleeve, and when a rotary grounding station operating shaft or a load station operating shaft is operated, the driving square sleeve is driven to perform corresponding mechanical motion through the driving connecting lever assembly and is transmitted to the driving arm assembly through the driving square sleeve.
The mechanism further comprises an operating handle and a handle forcible withdrawing assembly, wherein one handle forcible withdrawing assembly is arranged in each operating shaft cavity, a protruding boss is arranged on the operating handle, a port half-step position matched with the protruding boss of the operating handle is arranged at the shaft end of each operating shaft, and the inserting end of the operating handle is connected with the handle forcible withdrawing assembly.
The still further scheme is, the subassembly is withdrawed from including handle return ejector pin, return spring cover and return spring to the handle force, works as when operating handle inserts, operating handle's the end of inserting withstands handle return ejector pin, and promotes the return spring cover is right return spring compresses.
In a further scheme, operating shaft brake blocks are respectively arranged on the grounding station operating shaft and the load station operating shaft.
A control method of a double-shaft three-position load switch operating mechanism based on a shared energy storage spring is provided, the double-shaft three-position load switch operating mechanism based on the shared energy storage spring adopts the double-shaft three-position load switch operating mechanism based on the shared energy storage spring, and the method comprises the following steps: an effective spring compression stroke is set, and a reasonable driving crank arm transmission angle is arranged; the energy storage spring assembly is adopted to mutually utilize the whole process of spring compression, compression energy storage, energy storage release and waiting for next compression of the next grounding station operating shaft after the spring compression, the compression energy storage, the energy storage release and the release which are required by the load station operating shaft, and the energy storage spring assembly is mutually combined to realize two-shaft sharing, and simultaneously, the maximum kinetic energy released by the energy storage spring assembly is utilized to obtain the drive of the knife switch main shaft, so that the knife switch main shaft can effectively switch the charged knife switch from a load on working state to a load off working position, and continuously obtain the switch from the load off working position to the knife switch grounding working position under the condition of need.
The further scheme is that after the grounding station operating shaft or the load station operating shaft obtains certain initial energy storage spring compression energy through the rotation of the operating handle to the operating shaft, after the energy storage spring assembly is compressed to the maximum compressed point, the energy storage spring assembly enters a compression release state after the operating shaft is continuously rotated to pass through a mechanical setting stop point, and the energy storage spring assembly enters the maximum released state.
A further scheme is that when a line connecting a stress center point of the top end of the spring driving crank arm of the grounding station operating shaft with the mechanical center of the grounding station operating shaft and a neutral point of a driving crank arm assembly on the load station operating shaft forms a plane, the energy storage spring assembly is compressed to a maximum compressed point, and spring energy storage of grounding operation is completed; when the grounding station operating shaft continues to operate clockwise, the energy storage spring assembly enters an elastic force release state due to the fact that the energy storage spring assembly crosses the minimum stress point of the plane, the grounding station operating shaft is rapidly rotated along with the release of the elastic force by the spring driving crank welded on the grounding station operating shaft, corresponding mechanical characteristics of the energy storage spring assembly are transmitted to the driving arm assembly by the corresponding driving crank assembly and the driving square sleeve welded on the grounding station operating shaft, until the driving arm assembly stops moving, the driving arm assembly stays in a grounding station state, the grounding station operating shaft completes corresponding grounding operation under the action of the energy storage spring assembly, and the change from a load disconnection working position to a load connection working state is achieved; when the disconnecting link leaves the load connection working state and enters the load disconnection working position, the grounding station operating shaft is operated anticlockwise, so that after the grounding station operating shaft obtains energy storage spring potential energy, once the grounding station operating shaft passes through a mechanical stop point of a three-point one-line plane, the mechanical transmission system can drive the disconnecting link to automatically enter the load disconnection working position, and the change from the load disconnection working position to the disconnecting link grounding working position and from the disconnecting link grounding working position to the load disconnection working position is realized.
Therefore, the spring is mainly shared by two different (action) operating shafts, and the mechanical structure position of the spring can ensure that the two operating shafts can obtain mechanical states of mutual energy storage waiting when operating in a reasonable position range, thereby realizing three stations of a grounding state, a disconnecting state and a load connecting state. When the grounding station operating shaft and the load station operating shaft are adopted to drive the spring under certain technical conditions, an effective mechanical action mode that the spring is compressed and then releases potential energy to drive the operating shaft to autonomously complete can be obtained.
Furthermore, the structural characteristic that two shafts share the same energy storage spring greatly simplifies most of the prior similar spring operating mechanisms, and on the basis of sharing the energy storage spring, the mechanical transmission mechanism corresponding to the technical scheme of the invention and the corresponding auxiliary mechanical structure thereof are much simpler, because the operating shaft needs to complete compression energy storage release for the corresponding springs of applied compression energy storage, energy storage release and spring reset after release, and the operating state condition that the operating shaft can effectively and reasonably enter the next energy storage waiting working state is that the conventional two-spring mechanical structural system cannot be simply increased or decreased in quantity to obtain the energy storage waiting state.
Therefore, the double-shaft three-position load switch operating mechanism system based on the shared energy storage spring simplifies the mechanical structure of the double-shaft three-position spring operating mechanism system to the maximum extent, and effectively reduces the structural volume required by the complete set of switch equipment of the three-position disconnecting link main shaft operating system due to the reduction of the corresponding mechanical transmission parts, so that the matched switch equipment complete set becomes the most significant technical model selection component system in the aspects of operation simplification, volume miniaturization and structure compactness design.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a top view of an embodiment of a two-axis three-position load switch operating mechanism based on a shared stored energy spring of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of a double-shaft three-position load switch operating mechanism based on a shared energy storage spring.
Fig. 3 is a partial cross-sectional view of an energy storage spring assembly in an embodiment of a two-axis three-position load switch operating mechanism based on a shared energy storage spring of the present invention.
Fig. 4 is a schematic structural diagram of a driving square sleeve in an embodiment of a double-shaft three-position load switch operating mechanism based on a shared energy storage spring.
Fig. 5 is a schematic diagram of the position of the drive arm assembly in an embodiment of the two-shaft three-position load switch operating mechanism based on the shared stored energy spring of the present invention.
FIG. 6 is a schematic structural diagram of a knife switch spindle assembly with a driving square sleeve removed in an embodiment of a double-shaft three-position load switch operating mechanism based on a shared energy storage spring.
FIG. 7 is a schematic structural diagram of a handle forced-withdrawing assembly in an embodiment of a two-shaft three-position load switch operating mechanism based on a shared energy storage spring.
The reference numbers illustrate: the knife switch comprises a knife switch main shaft assembly 10, a knife switch main shaft 11, a driving square sleeve 12, a driving arm assembly 13, a main shaft fixing seat 14, a square sleeve shaft 15, a grounding station operating shaft 20, a loading station operating shaft 30, a driving crank arm assembly 40, a spring driving crank arm 50, an energy storage spring assembly 60, a small spring guide pipe 61, a large spring guide pipe 62, a spring guide seat 63, a spring seat 64, a large energy storage spring 65, a first guide pipe pin hole 66, a second guide pipe pin hole 67, a first guide pipe connecting pin 68, a second guide pipe connecting pin 69, an operating handle 70, a bulge boss 71, a port half step position 72, a handle forced withdrawing assembly 80, a handle returning ejector rod 81, a returning spring sleeve 82, a returning spring 83, an operating shaft brake block 90 and a supporting base plate 100
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
The embodiment of the double-shaft three-position load switch operating mechanism based on the shared energy storage spring comprises the following steps:
referring to fig. 1 to 7, a dual-shaft three-position load switch operating mechanism based on a shared energy storage spring comprises: the disconnecting link main shaft assembly 10, the grounding station operating shaft 20, the load station operating shaft 30 and the supporting bottom plate 100, the disconnecting link main shaft assembly 10 is fixedly connected with the disconnecting link, the disconnecting link main shaft assembly 10 is respectively connected with the grounding station operating shaft 20 and the load station operating shaft 30 through a driving crank arm assembly 40, a spring driving crank arm 50 is respectively welded on the grounding station operating shaft 20 and the load station operating shaft 30, wherein, a group of energy storage spring components 60 are arranged between the grounding station operating shaft 20 and the load station operating shaft 30, the energy storage spring components 60 are fixedly connected on the grounding station operating shaft 20 and the load station operating shaft 30 through the pipe connecting pins in the pipe pin holes, when the rotary grounding station operating shaft 20 or the load station operating shaft 30 is operated, the potential energy is released after the effective spring compression is obtained to drive the grounding station operating shaft 20 or the load station operating shaft 30 to complete the corresponding mechanical action mode.
It can be seen that a set of stored energy spring assemblies 60 are provided between the ground station operating shaft 20 and the load station operating shaft 30, and the basic mechanical arrangement of the assembly system with the ground station operating shaft 20 and the load station operating shaft 30 in the second station state is shown in the partial sectional view of fig. 1 and rotated (in the front view) as shown in fig. 2.
In this embodiment, the energy storage spring assembly 60 includes a small spring guide tube 61, a large spring guide tube 62 and two tube pin holes respectively used for connecting with the grounding station operating shaft 20 and the loading station operating shaft 30, the small spring guide tube 61 is connected with the large spring guide tube 62 in a matching manner, a spring guide seat 63 is arranged on one side of the small spring guide tube 61 close to the loading station operating shaft 30, a spring seat 64 is arranged on one side of the large spring guide tube 62 close to the grounding station operating shaft 20, a plurality of large energy storage springs 65 are uniformly arranged on the small spring guide tube 61 and the large spring guide tube 62, and guiding and limiting are respectively carried out through the spring guide seat 63 and the spring seat 64.
Further, a first pipe pin hole 66 for connecting with the load station operation shaft 30 is provided at one side of the small spring pipe 61, a first pipe connection pin 68 for fixedly connecting with the load station operation shaft 30 is provided at the first pipe pin hole 66, a second pipe pin hole 67 for connecting with the ground station operation shaft 20 is provided at one side of the large spring pipe 62, and a second pipe connection pin 69 for fixedly connecting with the ground station operation shaft 20 is provided at the second pipe pin hole 67.
In this embodiment, the knife switch spindle assembly 10 includes a knife switch spindle 11, a driving square sleeve 12, and a driving arm assembly 13, the knife switch spindle 11 is sleeved with a spindle fixing seat 14, two ends of the driving arm assembly 13 are respectively provided with a square sleeve shaft 15 for connecting with the driving square sleeve 12, when the rotary ground station operating shaft 20 or the load station operating shaft 30 is operated, the driving square sleeve 12 is driven to perform a corresponding mechanical motion by the driving crank arm assembly 40, and is transmitted to the driving arm assembly 13 by the driving square sleeve 12.
In this embodiment, the mechanism further includes an operating handle 70 and a handle forcible withdrawing assembly 80, one handle forcible withdrawing assembly 80 is disposed in each operating shaft cavity, a protruding boss 71 is disposed on the operating handle 70, a port half step 72 disposed in cooperation with the protruding boss 71 of the operating handle 70 is disposed on each operating shaft end, and the insertion end of the operating handle 70 is connected to the handle forcible withdrawing assembly 80.
In this embodiment, the handle forcible withdrawing assembly 80 includes a handle return push rod 81, a return spring housing 82 and a return spring 83, and when the operating handle 70 is inserted, the insertion end of the operating handle 70 pushes the handle return push rod 81 and pushes the return spring housing 82 to compress the return spring 83.
In the present embodiment, the ground station operation shaft 20 and the load station operation shaft 30 are further provided with operation shaft brake pads 90, respectively.
Specifically, as shown in fig. 3, the energy storage spring assembly 60 mainly comprises an energy storage large spring 65, a spring large conduit 62, a spring small conduit 61, a guide seat and a pad, and the assembly is fixed on the spring driving crank arm 50 of the ground station operating shaft 20 and the load station operating shaft 30 through conduit connecting pins in spring pin holes, when the ground station operating shaft 20 or the load station operating shaft 30 is operated and rotated, because both ends of the energy storage spring assembly 60 are respectively and directly fixed on the operating shafts, after the operating shafts rotate by a certain angle, there is always a maximum compressed point of the spring, the spring will enter a compression release state after continuously rotating through the dead point, and the released spring will enter the maximum released state because the other operating shaft cannot be operated simultaneously.
Further, with the mechanical transmission (driving) of the energy storage spring assembly 60, no matter the operation command comes from the ground station operation shaft 20 or the load station operation shaft 30, the assembly drives the driving square sleeve 12 to perform corresponding mechanical movement through the driving crank arm assembly 40 arranged at a certain angle. In particular, the driving square sleeve 12 of the embodiment is specially provided with a certain and reasonable force arm margin "region" based on the requirement of mechanical motion continuity to bear the residual motion vector brought by the motion directions of the two operating shafts, and the effective motion region can adapt to the operation of the grounding station operating shaft 20 and the load station operating shaft 30 and the spring relaxation and compression, and the absorption of the mechanical necessary motion vector brought in the whole process of passing a compression stop point, so that the effective rotating force arm for the knife brake main shaft 11 is obtained in the mechanical transmission system.
Therefore, the double-shaft three-position load switch operating mechanism system based on the shared energy storage spring is taken as an essential component of a complete set of power distribution equipment, and the whole structure of the driving system is completely equivalent to the mechanical transmission element required by a conventional spring operating mechanism. The overall top view structure of the switch knife switch of the driving system in the off state is shown in fig. 1, the main shaft assembly system of the switch knife switch in fig. 1 is the main mechanical force output transmission part of the mechanical system, and the grounding station operation shaft 20 and the loading station operation shaft 30 are the main mechanical force input transmission parts of the system device for receiving the external state switching action command. The system completes the switching of the basic working state (position) of safe, fast and reliable switching among load connection (power transmission), load disconnection (power outage) and disconnecting link grounding (maintenance) of the complete set of equipment by the aid of the output mechanical transmission of the disconnecting link main shaft 11 and an electrified disconnecting link attached to the switching equipment, action instructions required for switching are respectively from the grounding station operating shaft 20 or the load station operating shaft 30, and instruction mechanical force of the two shafts needs to be completed by means of the effective operating handle 70.
The embodiment of the control method of the double-shaft three-position load switch operating mechanism based on the shared energy storage spring comprises the following steps:
the control method of the double-shaft three-position load switch operating mechanism based on the shared energy storage spring adopts the double-shaft three-position load switch operating mechanism based on the shared energy storage spring, and comprises the following steps:
firstly, an effective spring compression stroke is set, and a reasonable driving crank arm transmission angle is arranged.
Then, the energy storage spring assembly 60 is used for mutually utilizing and combining the whole processes of spring compression, compression energy storage, energy storage release and waiting for 20 times of compression of the next grounding station operating shaft after being released by the load station operating shaft 30 to realize two-shaft sharing, and simultaneously, the maximum kinetic energy released by the energy storage spring assembly 60 is used for obtaining the drive of the knife switch main shaft 11, so that the knife switch main shaft 11 can effectively switch the charged knife switch from the load on working state to the load off working position, and continuously obtain the switch from the load off working position to the knife switch grounding working position under the condition of needing.
It can be seen that the overall structure of the driving system of the dual-shaft three-station load switch operating mechanism system sharing the energy storage spring provided by the invention is that when the load switch in the complete equipment device of the power distribution system needs to be matched with the small equipment with simple operation and compact structure for working, the mechanical characteristics of grounding, disconnecting and loading three-station states can be realized by effectively utilizing the knife switch main shaft assembly 10 through beneficial rotation on a fixed shaft (seat), and the reasonable effective mechanical distance between the two operating shafts is fully evaluated by combining the grounding station operating shaft 20 and the loading station operating shaft 30 which drive the crank arm assembly 40 and are matched with the three-station states, an effective spring compression stroke is set, and after a reasonable driving crank arm transmission angle is arranged, the energy storage spring assembly 60 is adopted to mutually utilize the whole processes of spring compression, energy storage release and waiting for next compression after the two operating shafts are arranged, The two shafts are shared by combining, and simultaneously, the maximum kinetic energy released by the spring is fully utilized to obtain the drive of the knife switch main shaft 11, so that the knife switch main shaft 11 can effectively switch the charged knife switch from a load on working state/position (first station) to a load off working position (second station), and the basic flow and the control technical requirements set by the necessary operation rules of the power distribution switch equipment, namely switching from the load off working position (second station) to the knife switch grounding working position (third station), are continuously obtained under the condition of need.
After the ground station operating shaft 20 or the load station operating shaft 30 obtains a certain initial energy storage spring compression energy through the rotation of the operating shaft by the operating handle 70, after the energy storage spring assembly 60 is compressed to the maximum compressed point, the energy storage spring assembly 60 will enter a compression release state after the operating shaft is continuously rotated to pass through a mechanical setting stop point, and the energy storage spring assembly 60 enters the maximum released state.
Specifically, after the ground station operating shaft 20 or the load station operating shaft 30 obtains a certain initial stored energy spring compression energy through the rotation of the operating shaft by the operating handle 70, once the stored energy spring assembly 60 is compressed to the maximum point, the stored energy spring assembly 60 will inevitably enter a release state after spring compression through a mechanical set dead point by continuing to rotate the operating shaft. Based on the structure of the shaft end port of the operating shaft and the special design of the operating handle 70, the operating shaft can be completely rotated continuously in the half-opening step of the operating shaft port according to the original operating direction based on the convex boss 71 at the end of the operating handle 70 shown in fig. 7, the rotating speed is obviously completely separated from the corresponding mechanical force operation association brought by the operating handle 70, and the continuous rotating process is completely driven by the released spring potential energy.
Further, during the rotation of the ground station operating shaft 20 or the load station operating shaft 30, the driving crank arm assembly 40 drives the driving assembly to rotate through the driving square sleeve 12 as shown in fig. 4, and the position state of the driving arm assembly 13 always has three stations as shown in fig. 5: after the driving arm assembly 13 in fig. 5 rotates clockwise or counterclockwise by a certain angle, the grounding station and the loading station of the knife gate spindle 11 are respectively obtained, and the horizontal position of the driving arm shown in fig. 5 is the disconnecting station of the knife gate spindle 11. Obviously, due to the mechanical characteristics and operating code requirements, when the actuator arm assembly 13 is in the illustrated horizontal position, i.e., the off position, the knife switch can be turned to the grounded or on load state by mechanical transmission.
In this embodiment, when a line connecting a stressed center point of the top end of the spring driving crank arm 50 of the ground station operating shaft 20 and a mechanical center of the ground station operating shaft 20 and a neutral point of the driving crank arm assembly 40 on the load station operating shaft 30 forms a plane, the energy storage spring assembly 60 is compressed to a maximum compressed point, and the spring energy storage of the ground operation is completed.
When the grounding station operating shaft 20 continues to operate clockwise, the energy storage spring assembly 60 enters an elastic force release state by crossing the plane minimum stress point, the spring driving crank arm 50 welded on the grounding station operating shaft 20 rotates rapidly along with the release of the elastic force, the corresponding mechanical property of the spring driving crank arm assembly 50 is transmitted to the driving arm assembly 13 by the corresponding driving crank arm assembly 40 and the driving square sleeve 12 welded on the grounding station operating shaft 20, until the driving arm assembly 13 stops moving, the driving arm assembly 13 stays in the grounding station state, and the grounding station operating shaft 20 completes corresponding grounding operation under the action of the energy storage spring assembly 60, so that the change from the load disconnection operating position to the load connection operating state is realized.
When the load is separated from the load connection working state and enters the load disconnection working position, the grounding station operating shaft 20 only needs to be operated anticlockwise, so that after the grounding station operating shaft 20 obtains energy storage spring potential energy, once the energy storage spring potential energy passes through a mechanical stop point of a three-point one-line plane, the mechanical transmission system can drive the disconnecting link to automatically enter the load disconnection working position, and the change from the load disconnection working position to the disconnecting link grounding working position and the change from the disconnecting link grounding working position to the load disconnection working position are realized.
That is, when the overall system of the present invention is in the state shown in fig. 1, in combination with the structure shown in fig. 2 and the connection manner of the corresponding driving arm and the driving crank arm, since the other end of the operating shaft is designed with the corresponding operating shaft brake block 90, there is only one rotation direction at this position: the ground station operating shaft 20 operates clockwise, the energy storage spring assembly 60 rotates clockwise through the operating shaft connecting pin system, at the moment, the large and small guide pipes arranged in the energy storage spring assembly 60 can realize effective guiding of the spring, and reduction of mechanical dimension between two ends of the spring caused by spring compression under the driving of the spring driving crank arm 50 can also be met.
When the stress center point of the top end of the spring driving crank arm 50 of the grounding station operating shaft 20 is connected with the mechanical center of the grounding station operating shaft 20 and the neutral point of the driving crank arm on the load station operating shaft 30 to form a plane, namely the three stress center lines form a plane, the energy storage spring assembly 60 is compressed to the maximum point, and the spring energy storage of the grounding operation is completed. When the ground station operating shaft 20 continues to operate clockwise, the energy storage spring assembly 60 crosses the minimum stress point of the "three-point-one-line plane" to enter an elastic force release state, the spring driving crank arm 50 welded on the ground station operating shaft 20 rotates rapidly along with the release of the elastic force, and at this time, the ground station operating shaft 20 rotates as long as the external force is not applied, and the corresponding mechanical characteristics of the spring driving crank arm assembly 40 and the driving square sleeve 12 welded on the ground station operating shaft 20 are transmitted to the driving arm assembly 13. Since the grounding station operating shaft 20 rotates clockwise at this time, it is obvious that, in conjunction with the structural components in fig. 2, the driving arm assembly 13 also rotates clockwise until the movement is terminated, the driving arm stays at the solid line position-grounding station state shown in fig. 5, and the grounding station operating shaft 20 completes the corresponding grounding operation through the structural components shown in fig. 6 under the action of the energy storage spring assembly 60 shown in fig. 3, so as to realize the change from the second station to the first station. When leaving the first station and entering the second station, the grounding station operating shaft 20 is operated counterclockwise only, so that after the grounding station operating shaft 20 obtains energy storage spring potential energy, once passing through the three points and the mechanical stop point, the mechanical transmission system can drive the disconnecting link to automatically enter the second station.
Accordingly, when the load station operating shaft 30 is operated to rotate clockwise based on the state shown in fig. 2, the corresponding mechanical characteristics will be transmitted to the driving arm assembly 13 by the corresponding driving crank arm assembly 40 and the driving square sleeve 12 welded to the load station operating shaft 30, according to the same mechanical transmission principle as that of the grounding station operating shaft 20. Since the driving square sleeve 12 and the grounding operation end are located at opposite ends with respect to the knife switch spindle 11, it is obvious that the driving arm assembly 13 will rotate counterclockwise due to the action of force, so as to obtain the loading station state of the chain line as shown in fig. 5, and realize the change from the second station to the third station. When leaving the third station and entering the second station, the load station operating shaft 30 is operated counterclockwise only, so that after the load station operating shaft 30 obtains the energy storage spring potential energy, once passing through the three points and one line of mechanical stop points, the mechanical transmission system can drive the disconnecting link to automatically enter the second station.
Obviously, the spring energy storage operating mechanism of this embodiment combines effective reasonable mechanical transmission angle and arm of force calculation to deal with through two different operation axles, two operation axles sharing/share one set of energy storage spring subassembly 60, has obtained corresponding three-station mechanical transmission output effect, has simplified the structure that a conventional spring operating system needs an operation axle to join in marriage an energy storage spring greatly.
In particular, the safety operating procedures of the disconnecting link based on the power distribution system comprise: when power is cut off, the switch disconnecting link is in a load connection state, the disconnecting link is required to be operated to be in a disconnection state, and when the disconnecting link is determined to be in the disconnection state, the disconnecting link can be operated to enter a grounding state to be overhauled or power is supplied again to connect the electric load. Correspondingly, when power is supplied, the disconnecting link is firstly opened from the grounding state to enter the disconnection state, when the grounding state is confirmed to be disconnected, the disconnecting link is supposed to be in the disconnection state, and when the disconnecting link is confirmed to be in the disconnection state and is not grounded, the disconnecting link can be operated to enter the load connection state. The system structure of the invention obviously meets the requirements of basic safety regulation of the operation of the disconnecting link of the power distribution system through corresponding operation.
In particular, in order to make the operating handle 70 be separated from mechanical force fit with the operating shaft immediately after the operating shaft passes through the mechanical force dead center of the 'three-point-one-line plane', the end of the operating shaft of the invention is provided with a mechanical structure of a port half step 72 matched with the convex boss 71 of the operating handle 70 as shown in fig. 7. When the convex boss 71 of the operating handle 70 rotates clockwise, the convex boss 71 contacts with one end face of a half step of the operating shaft (tube), and the other cross section of the step and the convex boss 71 have a position of at least half shaft perimeter, so that a movement distance is reserved under the condition that the operating shaft moves in the original direction and the boss of the handle is not moved.
Meanwhile, a special handle forced withdrawing assembly 80 is arranged in the operating shaft of the embodiment, and the mechanical stroke of the handle withdrawing is slightly longer than the effective contact length of the convex boss 71. A handle forced-withdrawing assembly 80 consisting of a handle return ejector rod 81, a return spring sleeve 82, a return spring 83 and a positioning plate thereof is arranged in a cavity of the operating shaft. When the operating handle 70 is inserted, the insertion end of the operating handle 70 abuts against the return ejector rod, the push spring sleeve compresses the return spring 83 together, and the push (compression) stroke of the return ejector rod is slightly larger than the depth of the boss, so that when the operating handle 70 is not pushed axially by external force to the operating shaft, the boss of the operating handle 70 and the half step of the operating shaft do not have any mechanical overlapping possibility, thereby further assisting the self-separation (non-complete withdrawal of the inner cavity of the operating shaft) between the operating handle 70 and the operating shaft under the condition of not receiving axial pressure, and separating from any mechanical connecting pin except the axial overlapping between the operating handle 70 and the operating shaft.
Therefore, the spring is mainly shared by two different (action) operating shafts, and the mechanical structure position of the spring can ensure that the two operating shafts can obtain mechanical states of mutual energy storage waiting when operating in a reasonable position range, thereby realizing three stations of a grounding state, a disconnecting state and a load connecting state. When the grounding station operating shaft 20 and the load station operating shaft 30 are used for driving the spring under certain technical conditions, an effective mechanical action mode can be achieved by compressing the spring and then releasing potential energy to drive the operating shafts to autonomously complete the corresponding mechanical action mode.
Furthermore, the structural characteristic that two shafts share the same energy storage spring greatly simplifies most of the prior similar spring operating mechanisms, and on the basis of sharing the energy storage spring, the mechanical transmission mechanism corresponding to the technical scheme of the invention and the corresponding auxiliary mechanical structure thereof are much simpler, because the operating shaft needs to complete compression energy storage release for the corresponding springs of applied compression energy storage, energy storage release and spring reset after release, and the operating state condition that the operating shaft can effectively and reasonably enter the next energy storage waiting working state is that the conventional two-spring mechanical structural system cannot be simply increased or decreased in quantity to obtain the energy storage waiting state.
Therefore, the double-shaft three-position load switch operating mechanism system based on the shared energy storage spring simplifies the mechanical structure of the double-shaft three-position spring operating mechanism system to the maximum extent, and effectively reduces the structural volume required by the complete set of switch equipment of the three-position disconnecting link main shaft operating system due to the reduction of the corresponding mechanical transmission parts, so that the matched switch equipment complete set becomes the most significant technical model selection component system in the aspects of operation simplification, volume miniaturization and structure compactness design.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. Three station load switch operating device of biax based on sharing energy storage spring which characterized in that includes:
a knife switch main shaft component, a grounding station operating shaft and a loading station operating shaft, wherein the knife switch main shaft component is fixedly connected with a knife switch, the knife switch main shaft assembly is connected with the grounding station operating shaft and the load station operating shaft through a driving crank arm assembly respectively, a spring driving crank arm is respectively welded on the grounding station operating shaft and the load station operating shaft, wherein a group of energy storage spring components are arranged between the grounding station operating shaft and the load station operating shaft, the energy storage spring assembly is fixedly connected to the grounding station operating shaft and the load station operating shaft through a guide pipe connecting pin in a guide pipe pin hole, when the rotary grounding station operating shaft or the load station operating shaft is operated, the potential energy is released after the effective spring compression is obtained to drive the grounding station operating shaft or the load station operating shaft to complete a corresponding mechanical action mode.
2. The shared energy storage spring-based dual-axis three-position load switch operating mechanism of claim 1, wherein:
energy storage spring assembly include the little pipe of spring, the big pipe of spring and be used for respectively with ground connection station operation axis load station operation axis two the pipe pinhole is connected, the little pipe of spring with the cooperation of the big pipe of spring is connected the little pipe of spring is close to in one side of load station operation axis is equipped with the spring guide seat the big pipe of spring is close to in one side of ground connection station operation axis is equipped with the spring holder evenly be provided with a plurality of energy storage big springs on little pipe of spring and the big pipe of spring, and pass through respectively the spring guide seat with the spring holder is led and is spacing.
3. The shared energy storage spring-based dual-axis three-position load switch operating mechanism of claim 2, wherein:
one side of the small spring pipe is provided with a first pipe pin hole used for being connected with the load station operating shaft, a first pipe connecting pin used for being fixedly connected with the load station operating shaft is arranged on the first pipe pin hole, one side of the large spring pipe is provided with a second pipe pin hole used for being connected with the grounding station operating shaft, and a second pipe connecting pin used for being fixedly connected with the grounding station operating shaft is arranged on the second pipe pin hole.
4. The shared energy storage spring-based dual-axis three-position load switch operating mechanism of claim 1, wherein:
the knife switch main shaft assembly comprises a knife switch main shaft, a driving square sleeve and a driving arm assembly, a main shaft fixing seat is sleeved outside the knife switch main shaft, square sleeve shafts are arranged at two ends of the driving arm assembly respectively and are used for being connected with the driving square sleeve, and when a rotary grounding station operating shaft or a load station operating shaft is operated, the driving square sleeve is driven to perform corresponding mechanical motion through the driving crank arm assembly and is driven to the driving arm assembly by the driving square sleeve.
5. The shared energy storage spring-based dual-axis three-position load switch operating mechanism as claimed in any one of claims 1 to 4, wherein:
the mechanism further comprises an operating handle and a handle forcible withdrawing assembly, wherein one handle forcible withdrawing assembly is arranged in each operating shaft cavity, a raised boss is arranged on the operating handle, a port semi-step position matched with the raised boss of the operating handle is arranged at the shaft end of each operating shaft, and the insertion end of the operating handle is connected with the handle forcible withdrawing assembly.
6. The shared energy storage spring-based dual-axis three-position load switch operating mechanism of claim 5, wherein:
the handle forced withdrawing assembly comprises a handle return ejector rod, a return spring sleeve and a return spring, and when the operating handle is inserted, the insertion end of the operating handle abuts against the handle return ejector rod and pushes the return spring sleeve to compress the return spring.
7. The shared energy storage spring-based dual-axis three-position load switch operating mechanism of claim 6, wherein:
and operating shaft brake blocks are respectively arranged on the grounding station operating shaft and the load station operating shaft.
8. A control method of a double-shaft three-position load switch operating mechanism based on a shared energy storage spring, which is characterized in that the double-shaft three-position load switch operating mechanism based on the shared energy storage spring is adopted as the double-shaft three-position load switch operating mechanism based on the shared energy storage spring according to any one of claims 1 to 7, and the method comprises the following steps:
an effective spring compression stroke is set, and a reasonable driving crank arm transmission angle is arranged;
the energy storage spring assembly is adopted to mutually utilize the whole process of spring compression, compression energy storage, energy storage release and waiting for next compression of the next grounding station operating shaft after the spring compression, the compression energy storage, the energy storage release and the release which are required by the load station operating shaft, and the energy storage spring assembly is mutually combined to realize two-shaft sharing, and simultaneously, the maximum kinetic energy released by the energy storage spring assembly is utilized to obtain the drive of the knife switch main shaft, so that the knife switch main shaft can effectively switch the charged knife switch from a load on working state to a load off working position, and continuously obtain the switch from the load off working position to the knife switch grounding working position under the condition of need.
9. The control method according to claim 8, characterized in that:
after the grounding station operating shaft or the load station operating shaft obtains certain initial energy storage spring compression energy through the rotation of the operating handle to the operating shaft, after the energy storage spring assembly is compressed to the maximum compressed point, the energy storage spring assembly enters a compression release state after the operating shaft is continuously rotated to pass through a mechanical setting stop point, and the energy storage spring assembly enters the maximum released state.
10. The control method according to claim 9, characterized in that:
when a connecting line of a stress central point of the top end of the spring driving crank arm of the grounding station operating shaft and a mechanical center of the grounding station operating shaft and a neutral point of a driving crank arm assembly on the load station operating shaft forms a plane, the energy storage spring assembly is compressed to a maximum compressed point, and the spring energy storage of the grounding operation is completed;
when the grounding station operating shaft continues to operate clockwise, the energy storage spring assembly enters an elastic force release state due to the fact that the energy storage spring assembly crosses the minimum stress point of the plane, the grounding station operating shaft is rapidly rotated along with the release of the elastic force by the spring driving crank welded on the grounding station operating shaft, corresponding mechanical characteristics of the energy storage spring assembly are transmitted to the driving arm assembly by the corresponding driving crank assembly and the driving square sleeve welded on the grounding station operating shaft, until the driving arm assembly stops moving, the driving arm assembly stays in a grounding station state, the grounding station operating shaft completes corresponding grounding operation under the action of the energy storage spring assembly, and the change from a load disconnection working position to a load connection working state is achieved;
when the disconnecting link leaves the load connection working state and enters the load disconnection working position, the grounding station operating shaft is operated anticlockwise, so that after the grounding station operating shaft obtains energy storage spring potential energy, once the grounding station operating shaft passes through a mechanical stop point of a three-point one-line plane, the mechanical transmission system can drive the disconnecting link to automatically enter the load disconnection working position, and the change from the load disconnection working position to the disconnecting link grounding working position and from the disconnecting link grounding working position to the load disconnection working position is realized.
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| CN202111649597.9A CN114388291A (en) | 2021-12-30 | 2021-12-30 | Double-shaft three-station load switch operating mechanism and method based on shared energy storage spring |
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| CN202111649597.9A CN114388291A (en) | 2021-12-30 | 2021-12-30 | Double-shaft three-station load switch operating mechanism and method based on shared energy storage spring |
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| CN114388291A true CN114388291A (en) | 2022-04-22 |
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| DE4142548A1 (en) * | 1991-12-21 | 1993-06-24 | Abb Energie Ag | Drive for electrical isolation switch e.g. for overhead contact system - has housing with electrical or manual drive with limit switch interlock circuit. |
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| CN201717144U (en) * | 2010-07-19 | 2011-01-19 | 福州天宇电气股份有限公司 | Interlocking apparatus between load switch mechanism and grounding switch mechanism |
| CN207587608U (en) * | 2017-05-05 | 2018-07-06 | 维龙（镇江）电工研究院有限公司 | A kind of excessively middle release device of operating mechanism |
| CN217008954U (en) * | 2021-12-30 | 2022-07-19 | 珠海市可利电气有限公司 | Double-shaft three-station load switch operating mechanism based on shared energy storage spring |
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| DE4142548A1 (en) * | 1991-12-21 | 1993-06-24 | Abb Energie Ag | Drive for electrical isolation switch e.g. for overhead contact system - has housing with electrical or manual drive with limit switch interlock circuit. |
| CN2708481Y (en) * | 2004-04-29 | 2005-07-06 | 广东省顺德开关厂有限公司 | Operating mechanism for high-voltage load switch |
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