CN112002602A - High-speed switch - Google Patents
High-speed switch Download PDFInfo
- Publication number
- CN112002602A CN112002602A CN202010560157.5A CN202010560157A CN112002602A CN 112002602 A CN112002602 A CN 112002602A CN 202010560157 A CN202010560157 A CN 202010560157A CN 112002602 A CN112002602 A CN 112002602A
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- contact
- static contact
- moving contact
- elastic
- speed switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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Abstract
The invention relates to a high-speed switch, which specifically comprises: the moving contact component and the static contact component; an operating mechanism; the spring holding structure is arranged on one side of the movable contact component, which is opposite to the static contact component, and is used for holding the movable contact at a closing limit position; the static contact component comprises a static contact, an elastic buffer structure and a limit structure for stopping and limiting the static contact; the elastic buffer structure provides elastic acting force for the static contact which is larger than the elastic acting force provided by the spring holding structure for the moving contact, the moving contact overcomes the acting force of the elastic buffer structure to push back the static contact under the driving of the operating mechanism in the switching-on process, after the driving force of the operating mechanism is removed, the elastic buffer structure pushes the static contact and pushes the moving contact back reversely until the static contact is blocked by the limiting structure, and the moving contact and the static contact are elastically propped. The high-speed switch has high switching-closing response speed and better applicability in flexible direct-current transmission and direct-current power grid.
Description
Technical Field
The invention relates to the technical field of high-voltage flexible direct-current power transmission switch equipment, in particular to a fracture structure of a high-speed switch and the high-speed switch.
Background
With the development of clean energy and large-scale grid-connected application, flexible direct-current transmission and direct-current power grid technologies are rapidly developed. In order to adapt to the application requirements of flexible direct current transmission and direct current power grids, a breaker for breaking direct current fault current in millisecond level becomes an essential device of a power transmission network, so that high-speed mechanical switch equipment with extremely short breaking time becomes a main aspect of research of most electric power equipment manufacturers.
In the research on high-speed mechanical switches, there are two main aspects. The first is the research on the operating mechanism, that is, the on-off performance of the high-speed mechanical switch is improved by improving the response speed and the load of the operating mechanism, for example, the repulsion operating mechanism disclosed in the chinese patent with the publication number of CN104362050B not only realizes that the operating mechanism has higher corresponding speed, but also realizes good buffering and braking effects. The second is research on the opening and closing of the opening, for example, compared with a method of realizing conduction by end face contact between a moving contact and a static contact of a fracture structure, the method of realizing conduction by mutual insertion has the advantage of short opening and closing stroke and is generally applied.
However, corresponding problems are encountered in the research process aiming at the two different directions, for example, a fracture structure with end face contact faces a problem that the contact is greatly impacted, especially, in the rapid switching-on process of the moving contact, severe impact is often caused to the static contact, so that not only is the contact easy to bounce and cause arc discharge, but also the moving contact and the static contact are seriously damaged in severe cases, and the service life is greatly reduced.
For such a problem, the prior art is also improved in a corresponding manner, for example, a moving contact of a fast vacuum switch for protecting a high-power electronic converter disclosed in chinese patent application publication No. CN102184795A is driven by a permanent magnet operating mechanism to perform an opening and closing operation, and a fixed contact sliding tea bank is in a contact finger seat and is pressed by a spring in the contact finger seat. When the switch is switched on, the operating mechanism drives the moving contact to move towards the fixed contact and pushes the fixed contact towards the contact finger seat for a certain distance to reach a switch-on position, and at the moment, the spring is pressed to store energy; when the brake is switched off, the operating mechanism drives the moving contact to leave the fixed contact, and at the moment, the spring retreats the fixed contact and the movable contact moves along with the moving contact to release energy, so that a certain initial acting force is provided for the moving contact, and the moving contact has a certain initial speed.
However, the vacuum switch has a buffering effect when the moving contact is switched on to impact the static contact by arranging the spring on the back side of the static contact, but the moving contact pushes the static contact to move for a certain distance, and the static contact also needs to follow the moving contact to move for a certain distance under the action of the spring during switching off, so that although the initial switching-off speed of the moving contact can be increased by releasing energy through the spring, the response time of the separation of the moving contact and the static contact during switching off is actually increased, but the moving contact and the static contact cannot be separated as soon as possible when the separation of the moving contact and the static contact is needed, and the service performance of the switch.
Disclosure of Invention
The invention aims to provide a high-speed switch, which is used for solving the problem that the existing high-speed switch has low brake-opening response speed.
The high-speed switch of the present invention comprises:
the fracture structure comprises a moving contact component and a fixed contact component;
the output end of the operating mechanism is in transmission connection with a moving contact contained in the moving contact assembly and drives the moving contact to open and close;
the spring holding structure is arranged on one side of the movable contact component, which is opposite to the static contact component, and is used for holding the movable contact at a closing limit position;
the fixed contact assembly comprises a fixed contact, an elastic buffer structure arranged on one side of the fixed contact, which is opposite to the moving contact, and a limit structure used for stopping and limiting the fixed contact on one side facing the moving contact assembly;
the elastic buffer structure provides elastic acting force for the static contact which is larger than the elastic acting force provided by the spring holding structure for the moving contact, the moving contact overcomes the acting force of the elastic buffer structure to push back the static contact under the driving of the operating mechanism in the switching-on process, after the driving force of the operating mechanism is removed, the elastic buffer structure pushes the static contact and pushes the moving contact back reversely until the static contact is blocked by the limiting structure, and the moving contact and the static contact are elastically propped.
When the high-speed switch is used and in the switching-on process, the operating mechanism drives the moving contact to move towards the fixed contact at a high speed, when the moving contact and the fixed contact are contacted, the fixed contact is impacted by the moving contact, the elastic buffer structure plays a role in buffering and is compressed, the fixed contact moves along with the moving contact and is ejected and retreated, and due to the elastic support of the elastic buffer structure, the fixed contact cannot bounce with the moving contact due to the instant impact of the moving contact, so that the contact is reliable; after closing is completed, the driving force of the operating mechanism for the moving contact is removed, at the moment, because the elastic acting force of the elastic buffer structure is greater than that of the spring retaining structure, the static contact pushes the moving contact to move in a reverse direction until the moving contact is blocked by the limiting structure, and at the moment, under the dual actions of the elastic buffer structure and the spring retaining structure, the moving contact and the static contact are elastically abutted, so that reliable conduction is ensured; when the brake is switched off, the moving contact can be directly separated from the static contact under the driving of the operating mechanism, so that the rapid brake switching-off is realized. The high-speed switch can be switched on at a higher speed, the bouncing phenomenon cannot occur, the dynamic and static contacts can be reliably abutted in the switching-on state, the dynamic and static contacts can be directly separated in the switching-off process, the rapid switching-off is realized, and the switching-on and switching-off response speed is high.
Furthermore, the static contact assembly comprises a static contact seat, the static contact and the static contact seat are assembled in a guiding and sliding mode and are conducted with each other, and the limiting structure is arranged on the static contact seat. With limit structure integration on the stationary contact seat, simple structure sets up more conveniently, can not too much occupation space moreover.
Furthermore, a stopping structure is arranged on the fixed contact, an annular step surface in stopping fit with the stopping structure is arranged on the fixed contact, and the annular step surface forms the limiting structure. The annular step surface is used as a limiting structure, so that the processing and the manufacturing are more convenient, the limiting on the stop structure on the static contact is reliable, the position of the static contact is better ensured, and the opening distance of the fracture structure is ensured.
Furthermore, a stepped through hole is formed in the static contact seat, the static contact is assembled in the small-diameter section of the stepped through hole in a guiding and sliding mode, the stopping structure is arranged on the part, located in the large-diameter section of the stepped through hole, of the static contact, the annular stepped surface is formed by the stepped surface of the stepped through hole, and the elastic buffering structure is arranged in the large-diameter section of the stepped through hole. According to the structure design, on one hand, the limiting structure is simply realized, on the other hand, the elastic buffering structure is arranged in the stepped through hole, the structure is more compact, and the integration level is higher.
Furthermore, the stop structure is a positioning nut which is screwed on the end part of the static contact. The positioning nut is used as a stopping structure, so that the installation requirements of the static contact and the static contact base are met, and the relative position of the static contact and the static contact base can be adjusted by adjusting the screwing position of the positioning nut, so that the distance between the movable contact and the static contact can be conveniently adjusted.
Furthermore, the static contact assembly further comprises a top plug fixed on the static contact seat, the top plug comprises a fixed plate body and a top rod vertically connected to the fixed plate body, the fixed plate body is fixedly connected to the static contact seat, the top rod extends into the large-diameter section of the stepped through hole, and the elastic buffer structure is a pressure spring clamped between the top rod and the static contact. The compression spring is compressed in the static contact seat through the top plugging piece, the space occupied by the whole static contact component is reduced, the static contact component is more compact, and meanwhile, the compression spring is better limited, so that the elastic action of the static contact component is more stable.
Furthermore, one of the ejector rod and the static contact is provided with a stable hole for the pressure spring to be partially installed. The pressure spring is limited by the stabilizing hole, so that the elastic support is ensured to be provided along the axial direction, and deflection or skew torsion is avoided.
Furthermore, the operating mechanism is a repulsion mechanism, the repulsion mechanism comprises opening and closing coils which are oppositely arranged and a repulsion disc which is positioned between the opening and closing coils, the repulsion mechanism further comprises an insulating pull rod, the insulating pull rod penetrates through the opening and closing coils and is connected with the moving contact, and the repulsion disc is fixedly connected with the insulating pull rod. The repulsion operating mechanism is adopted to further ensure the opening and closing response speed of the high-speed switch.
Furthermore, the spring holding structure comprises more than two elastic pushing assemblies arranged at the axial side of the insulating pull rod, the elastic pushing direction of each elastic pushing assembly is the horizontal direction, and the elastic pushing end of each elastic pushing assembly is connected with the insulating pull rod through a connecting rod. The spring holding structure is arranged in the opening and closing movement stroke of the insulating pull rod, the middle position of the stroke is the position with the largest elastic acting force, so that the moving contact can be held at the opening position and the closing position respectively after the insulating pull rod passes through the middle position, and the moving contact retreats for a certain distance due to the fact that the moving contact is pushed by the fixed contact at the closing position, so that the distance from the closing position to the middle position with the largest elastic acting force of the moving contact is shortened, when the moving contact is driven by the operating mechanism to open the brake, the moving contact can more quickly cross the middle position with the larger elastic acting force to reach the opening position, and the opening speed is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a high-speed switch according to an embodiment of the present invention in a closing state;
FIG. 2 is a schematic diagram of a high-speed switch according to an embodiment of the present invention in an open state;
in the figure: 1-an operation unit; 10-repulsion mechanism; 20-an insulating sleeve; 21-moving contact; 22-a stationary contact; 220-stationary contact base; 221-positioning nuts; 3, pressing a spring; 4-top blocking piece; 5-spring retention feature.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The first embodiment of the high-speed switch of the invention:
the high-speed switch of the present invention is shown in fig. 1-2, and includes an operating unit 1 and a break structure. For convenience of explanation, the following description will be made only in the direction shown in the drawings, and the actual direction of each member of the high-speed switch in use is not limited. The fracture structure comprises an insulating sleeve 20, and wire holders are respectively and hermetically mounted at the upper end and the lower end of the insulating sleeve 20. The insulating sleeve 20 is internally and oppositely provided with a moving contact component and a static contact component, the moving contact component comprises a moving contact seat fixedly arranged on the lower wiring seat and a moving contact 21 arranged in the moving contact seat in a guiding and sliding manner, and the moving contact 21 is in conductive contact with the moving contact seat to realize the conduction with the lower wiring seat. The static contact component comprises a static contact base 220 integrally formed with the upper wiring base and a static contact 22 installed in the static contact base in a guiding and sliding mode, and the static contact 22 is conducted with the upper wiring base through conductive contact with the static contact base 220.
The stationary contact base 220 has a hollow columnar structure, an inner hole of the hollow columnar structure is a stepped through hole, and the stationary contact 220 is in guiding sliding fit with a small-diameter section of the stepped through hole. An elastic buffer structure is arranged in the large-diameter section of the stepped through hole. The elastic buffer structure is mainly used for providing downward elastic force for the static contact so as to play an elastic buffer role when the moving contact performs closing action and impacts the static contact.
Specifically, fixed mounting has a top stifled piece 4 on the stationary contact seat, and top stifled piece 4 includes fixed plate body and integrated into one piece in the ejector pin of fixed plate body side, and fixed plate body fixed connection is on the stationary contact seat, and during the ejector pin stretched into the major diameter section of notch cuttype perforating hole, elastic buffer structure was for pressing from both sides the pressure spring 3 of pressing from both sides between ejector pin and static contact 22. Preferably, in this embodiment, a blind hole is formed at an end of the push rod facing the stationary contact 22 to form a stable hole for accommodating most of the compression spring 3, and an end of the compression spring 3 exposed out of the stable hole abuts against the stationary contact 22. The stable hole can ensure that the whole pressure spring 3 is in a linear state, and provides an elastic acting force extending axially for the static contact 22 when the static contact is pressed, and the acting force in the direction is just opposite to the impact force of the movable contact on the static contact when the movable contact is switched on.
Certainly, the static contact 22 should keep a certain position in a natural state, which requires a limiting structure to limit the elastic pressing of the compression spring 3 against the static contact 22. As shown in the figure, a stop structure is further disposed at one end of the static contact 22 in the large diameter section of the stepped through hole, that is, the end abutting against the pressure spring 3, and the stop structure is just matched with the step surface of the stepped through hole, and under the action of the pressure spring 3, the stop structure is tightly attached to the step surface of the stepped through hole to determine the position of the static contact.
As can be seen from the figure, in the present embodiment, a disc-shaped structure is integrally formed at one end of the static contact 22 for making contact with the moving contact 21, and a disc-shaped structure is also integrally formed at one end of the moving contact 21 for making contact with the static contact 22, so as to achieve a larger contact area, and increase the current sharing capability and the reliability of conductive contact. In order to more conveniently implement the installation of the static contact into the static contact seat, in this embodiment, the positioning nut 221 screwed to the end portion of the static contact, which is opposite to the moving contact, is used as a blocking structure, so that the positioning nut is screwed after the static contact is installed from the small-diameter section of the static contact seat. Moreover, by adjusting the position of the positioning nut 221 on the static contact 22, the length of the static contact 22 extending out of the small-diameter section of the stepped through hole can be adjusted, that is, the position of the static contact relative to the static contact seat can be adjusted, so that the adjustment of the distance between the moving contact and the static contact is realized, and the debugging and the assembly of the high-speed switch are more convenient.
According to the overall structure design of the static contact component, the elastic buffer structure is integrally assembled in the static contact seat, so that the structure of the whole static contact component is more compact, and the occupied space of the static contact component is reduced.
Further, the operating unit 1 includes a repulsive force mechanism 10 and a spring holding structure 5. The repulsion mechanism 10 comprises opening and closing coils which are oppositely arranged and a repulsion plate which is positioned between the opening and closing coils, the repulsion mechanism further comprises an insulating pull rod, the repulsion plate is fixedly connected with the insulating pull rod, the insulating pull rod respectively penetrates through the opening and closing coils, one end of the insulating pull rod extending into the inner hole of the movable contact base is connected with the movable contact, and the other end of the insulating pull rod is connected with the spring holding structure 5. The spring holding structure 5 comprises two elastic pushing assemblies arranged on the axial side of the insulating pull rod, the two elastic pushing assemblies are symmetrically arranged, the elastic pushing direction of each elastic pushing assembly is the horizontal direction, and the elastic pushing end of each elastic pushing assembly is connected with the end part of the insulating pull rod through a connecting rod. Of course, the number of the elastic pushing assemblies is not limited in the present invention, in other embodiments, where a greater elastic holding force is required, three or four elastic pushing assemblies may be provided, and in this case, a plurality of elastic pushing assemblies are preferably distributed uniformly around the axis of the insulating pull rod.
When the moving contact is at the switching-on position, the end part of the insulating pull rod is positioned at the upper side positions of the two elastic pushing assemblies, when the moving contact is at the switching-off position, the end part of the insulating pull rod is positioned at the lower side positions of the two elastic pushing assemblies, and when the moving contact is at the middle position of the switching-on and switching-off stroke, the end part of the insulating pull rod is approximately positioned at the position coplanar with the two elastic pushing assemblies, and at the position, the elastic acting force of the elastic pushing assemblies is the largest, namely, when the insulating pull rod drives the moving contact to move from switching-off to switching-on or from switching-on to switching-off, the elastic pushing assemblies initially play a role in a blocking way, and only after the end part of the insulating pull rod passes through the position between the. Therefore, the movable contact can be kept at an opening position or a closing position through the elastic pushing assembly.
Specifically, the operation unit can fully adopt the structure of the repulsion operation mechanism disclosed in the chinese patent with an authorization publication number CN104362050B cited in the background of the invention, and the specific structure and the operation principle thereof are not elaborated.
The high-speed switch is characterized in that a spring retaining structure is respectively arranged on one side of a moving contact, which is opposite to a fixed contact, and an elastic buffer structure is arranged on one side of the fixed contact, which is opposite to the moving contact, so that when the high-speed switch works, such as a switching-on process, an operating mechanism drives the moving contact to move towards the fixed contact at a high speed through an insulating pull rod, the driving force of the operating mechanism completely overcomes the retaining force of the spring retaining structure and drives the moving contact to move upwards, when the moving contact and the fixed contact are contacted, the fixed contact is impacted by the moving contact, the elastic buffer structure plays a buffer role and is compressed, and the fixed contact moves along with the moving contact and is pushed upwards and retreated, and due to the elastic support of the elastic buffer structure, the; when the stable state of closing is kept, the movable contact and the static contact are elastically abutted under the dual actions of the elastic buffer structure and the spring retaining structure, and the reliable conduction is ensured.
In addition, it is also more critical that the elastic buffer structure provides the elastic acting force for the static contact greater than the elastic acting force provided for the moving contact by the spring holding structure. Therefore, after the moving contact is switched on and the operating mechanism removes the driving force for the moving contact, the static contact pushes the moving contact to move downwards in a reverse direction because the elastic acting force of the elastic buffering structure is greater than that of the spring retaining structure until the moving contact is blocked by the limiting structure and cannot move downwards continuously, and a stable switching-on state is achieved. When the opening is started, the driving force of the operating mechanism acts on the moving contact through the insulating pull rod, and then the moving contact can be directly driven to be separated from the fixed contact. Moreover, as can be seen from the above analysis, in the steady state of closing, the maximum distance between the movable contacts and the opposite direction has already been reversed, that is, the distance from the movable contacts to the opening position is reduced by a certain distance, so that the time for the movable contacts to return to the opening position under the driving action of the operating mechanism is shorter, and therefore, compared with the vacuum switch disclosed in the chinese patent application publication No. CN102184795A, which is identified in the background of the present invention, the response speed of opening is increased.
According to the description, the high-speed switch can be switched on at a high speed, the bouncing phenomenon cannot occur, the dynamic and static contacts can be reliably abutted in the switching-on state, the dynamic and static contacts can be directly separated in the switching-off process, the rapid switching-off is realized, the switching-on and switching-off response speed is high, and the applicability in flexible direct current power transmission and a direct current power grid is better.
Of course, the high-speed switch of the present invention is not limited to the above-described embodiment. Several other embodiments of high-speed switches based on the design concept of the present invention are listed below.
For example, in other embodiments, unlike the above-described embodiment, the actuator may be a spring actuator or a hydraulic actuator, which are all existing mature high-voltage switch actuators and can be replaced with simpler actuators. In the alternative use, the relative positions of the actuator and the spring holding structure can be adjusted appropriately according to actual needs, and these adjustments and structural adaptations are routine designs that can be made by those skilled in the art and will not be described in detail herein.
For example, the spring retaining structure may be a retaining structure only used for retaining the movable contact at the closing position, for example, a gas spring is installed at an end of the insulating pull rod facing away from the movable contact, the gas spring is filled with high-pressure gas during the closing action and in the closing stable state to provide elastic support for the movable contact, and the gas spring is decompressed during the opening action and in the opening stable state to prevent the blocking of the opening action. Of course, the air inflation and deflation control system of the air spring is connected with the control system of the operating mechanism to respond mutually.
For another example, in another embodiment, different from the first embodiment, the disk-shaped structure at the end of the static contact, which is used for abutting against the movable contact, is a detachable structure, so that after the static contact is installed in the guiding sliding installation hole of the static contact seat, the disk-shaped structure is installed, and at this time, the positioning nut can be replaced by the stop structure integrally formed with the static contact.
Or, in another embodiment, different from the first embodiment, the inner hole of the hollow cylindrical structure of the static contact base is a through hole structure with a uniform diameter, the static contact is slidably installed in the through hole in a guiding manner, the stop structure for limiting the position of the static contact is installed on the upper wire holder and is an L-shaped limiting plate structure, the upper end of the L-shaped limiting plate is connected with the upper wire holder, and the lower end hook portion is hooked and stopped with the radial protrusion on a section of the static contact extending out of the static contact base.
Still alternatively, in another embodiment, different from the first embodiment, the stationary contact base is a cylindrical structure, an upper end of the stationary contact base is integrally formed with the upper wire holder, the stationary contact is slidably sleeved on the cylindrical stationary contact base in a guiding manner, a corrugated tube is clamped between an annular end surface of the stationary contact and the upper wire holder, the corrugated tube serves as an elastic buffer structure to provide an elastic force to the stationary contact, the stop structure for limiting the position of the stationary contact is installed on the upper wire holder and is an L-shaped limit plate structure, an upper end of the L-shaped limit plate is connected with the upper wire holder, and the lower end hook portion is hooked and stopped by the radial protrusion on the stationary contact.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (9)
1. A high speed switch, comprising:
the fracture structure comprises a moving contact component and a fixed contact component;
the output end of the operating mechanism is in transmission connection with a moving contact contained in the moving contact assembly and drives the moving contact to open and close;
the method is characterized in that:
the high-speed switch further comprises:
the spring holding structure is arranged on one side of the movable contact component, which is opposite to the static contact component, and is used for holding the movable contact at a closing limit position;
the fixed contact assembly comprises a fixed contact, an elastic buffer structure arranged on one side of the fixed contact, which is opposite to the moving contact, and a limit structure used for stopping and limiting the fixed contact on one side facing the moving contact assembly;
the elastic buffer structure provides elastic acting force for the static contact which is larger than the elastic acting force provided by the spring holding structure for the moving contact, the moving contact overcomes the acting force of the elastic buffer structure to push back the static contact under the driving of the operating mechanism in the switching-on process, after the driving force of the operating mechanism is removed, the elastic buffer structure pushes the static contact and pushes the moving contact back reversely until the static contact is blocked by the limiting structure, and the moving contact and the static contact are elastically propped.
2. The high-speed switch of claim 1, wherein the stationary contact assembly comprises a stationary contact base, the stationary contact and the stationary contact base are slidably assembled and guided to be in communication with each other, and the limiting structure is disposed on the stationary contact base.
3. The high-speed switch of claim 2, wherein the stationary contact is provided with a stop structure, the stationary contact is provided with an annular step surface in stop fit with the stop structure, and the annular step surface constitutes the limit structure.
4. The high-speed switch according to claim 3, wherein the stationary contact is provided with a stepped through hole, the stationary contact is slidably fitted in a small diameter section of the stepped through hole, the stopper structure is provided on a portion of the stationary contact located in a large diameter section of the stepped through hole, a step surface of the stepped through hole constitutes the annular step surface, and the elastic buffer structure is disposed in the large diameter section of the stepped through hole.
5. The high speed switch of claim 4, wherein the stop structure is a retaining nut that is threaded onto the end of the stationary contact.
6. The high-speed switch according to claim 4, wherein the fixed contact assembly further comprises a plug fixed on the fixed contact base, the plug comprises a fixed plate and a plunger vertically connected to the fixed plate, the fixed plate is fixedly connected to the fixed contact base, the plunger extends into the large-diameter section of the stepped through hole, and the elastic buffer structure is a compression spring sandwiched between the plunger and the fixed contact.
7. The high-speed switch according to claim 6, wherein one of the plunger and the stationary contact is provided with a stabilizing hole for receiving the pressure spring portion.
8. The high-speed switch according to any one of claims 1 to 7, wherein the operating mechanism is a repulsion mechanism, the repulsion mechanism comprises oppositely arranged opening and closing coils and a repulsion plate arranged between the opening and closing coils, the repulsion mechanism further comprises an insulating pull rod, the insulating pull rod penetrates through the opening and closing coils and is connected with the moving contact, and the repulsion plate is fixedly connected with the insulating pull rod.
9. The high-speed switch according to claim 8, wherein the spring holding structure comprises more than two elastic pushing assemblies arranged at the axial side of the insulating pull rod, the elastic pushing direction of the elastic pushing assemblies is horizontal, and the elastic pushing ends of the elastic pushing assemblies are connected with the insulating pull rod through connecting rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560157.5A CN112002602B (en) | 2020-06-18 | 2020-06-18 | High-speed switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560157.5A CN112002602B (en) | 2020-06-18 | 2020-06-18 | High-speed switch |
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| Publication Number | Publication Date |
|---|---|
| CN112002602A true CN112002602A (en) | 2020-11-27 |
| CN112002602B CN112002602B (en) | 2022-09-27 |
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| CN202010560157.5A Active CN112002602B (en) | 2020-06-18 | 2020-06-18 | High-speed switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951523A (en) * | 2021-01-19 | 2021-06-11 | 中车株洲电力机车有限公司 | Insulator |
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| CN114242506B (en) * | 2021-11-05 | 2024-05-24 | 河南平高电气股份有限公司 | Quick grounding switch |
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