CN218730638U - Coaxial single-pole vacuum contactor and multi-pole vacuum contactor - Google Patents
Coaxial single-pole vacuum contactor and multi-pole vacuum contactor Download PDFInfo
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- CN218730638U CN218730638U CN202221692355.8U CN202221692355U CN218730638U CN 218730638 U CN218730638 U CN 218730638U CN 202221692355 U CN202221692355 U CN 202221692355U CN 218730638 U CN218730638 U CN 218730638U
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Abstract
The utility model discloses a coaxial single-pole vacuum contactor and a multi-pole vacuum contactor, which comprises a driving mechanism, a pulling block component, an elastic switching-on/off component and a vacuum switch tube which are sequentially connected along the axial direction; the driving mechanism is used for receiving closing and opening signals to drive the pull block assembly and drive the vacuum switch tube to close and open through the elastic closing and opening assembly; the elastic switching-on/off assembly is used for absorbing the redundant stroke exceeding the switching-on stroke and/or the switching-off stroke of the vacuum switch tube when the pull block assembly moves axially. In the coaxial single-pole vacuum contactor, the pull block assembly, the vacuum switch tube, the driving mechanism and the elastic switching-on and switching-off assembly are coaxially arranged in the vacuum contactor, the pull block assembly replaces the existing crank arm lever structure, and the driving mechanism coaxially drives the movable contact, so that the structure has no moment amplification, the stroke is shortened, and the switching-on and switching-off speed is improved; meanwhile, the pull block assembly is matched with the elastic switching-on and switching-off assembly, the moving contact is improved to be acted by the pulling force and the elastic force together, and the switching-on and switching-off capacity is improved.
Description
Technical Field
The utility model relates to a vacuum contactor technical field especially relates to a coaxial monopole vacuum contactor and multipolar vacuum contactor.
Background
The existing permanent magnet vacuum contactor is mostly 3 grades, and three vacuum switch tubes 8 are driven by a permanent magnet driving cylinder, as shown in fig. 1, the structure is relatively fixed, a lever crank arm 11 is used for conducting switching-on and switching-off driving force, the switching-on and switching-off time is enlarged due to the fact that the synchronism of three poles is guaranteed, and meanwhile, the mechanical service life of the whole machine is greatly shortened due to the fact that a friction rotating mechanism is arranged.
And the vacuum switch tube 8 when single-phase use or ground connection use only needs two or one, and this type of tripolar contactor's use also causes the wasting of resources.
SUMMERY OF THE UTILITY MODEL
The utility model provides a coaxial monopole vacuum contactor and multipolar vacuum contactor to solve current multipolar contactor and use lever crank arm mechanism to have the moment that radial force caused and too big lead to closing the technical problem that separating brake speed is slow, the reliability is poor.
The utility model adopts the technical scheme as follows:
a coaxial single-pole vacuum contactor comprises a vacuum switch tube, wherein a moving contact of the vacuum switch tube is electrically connected with an outgoing line, a static contact of the vacuum switch tube is electrically connected with an incoming line, the moving contact is used for moving and then is in contact connection with or disconnected from the static contact, and the vacuum contactor comprises a driving mechanism, a pull block assembly, an elastic closing and opening assembly and a vacuum switch tube which are sequentially connected along the axial direction;
the driving mechanism is used for receiving a switching-on signal to drive the pull block assembly to axially move, and the pull block assembly axially moves and drives the vacuum switch tube to switch on through the elastic switching-on and switching-off assembly; the driving mechanism is used for receiving a brake opening signal to drive the pull block assembly to move axially, and the pull block assembly moves axially and drives the vacuum switch tube to perform brake opening action through the elastic brake opening and closing assembly;
the elastic switching-on/off assembly is used for absorbing the redundant stroke exceeding the switching-on stroke and/or the switching-off stroke of the vacuum switch tube when the pull block assembly moves axially.
As a preferable mode, the driving mechanism includes a control module and a permanent magnet cylinder coaxially arranged with the pull block assembly, and the control module is configured to receive a switching-on signal or a switching-off signal to control a magnetic field direction of an iron core inside the permanent magnet cylinder
As a preferable mode, the permanent magnet cylinder comprises a shell, an inner cavity is formed in the shell, and an iron core can axially move and is arranged in the inner cavity in driving connection with the pull block assembly; the middle part of the inner wall of the inner cavity is provided with a permanent magnet, and the iron core is kept to be abutted against the inner wall of the first end face of the shell or the inner wall of the second end face of the shell under the action of the permanent magnet; the inner wall of the first end of the inner cavity is provided with a first coil electrically connected with the control module, and the inner wall of the second end of the inner cavity is provided with a second coil electrically connected with the control module.
As a preferable mode, the pulling block assembly comprises a tension sensor and a pulling block, wherein a first end of the tension sensor is connected with an output end of the permanent magnet cylinder, and a second end of the tension sensor is connected with a first end of the pulling block; the tension sensor is electrically connected with the control module; and the second end of the pull block is connected with the elastic switching-on/off component.
Preferably, the vacuum contactor further comprises a housing, and the driving mechanism, the pull block assembly, the elastic switching assembly and the vacuum switch tube are mounted on the housing.
As a preferable mode, the housing is provided with a limit opening, and a limit protrusion extending out of the limit opening from the inside to the outside of the housing is formed in the radial direction of the side wall of the pull block assembly in a protruding manner and used for limiting the stroke of the pull block assembly.
As a preferable mode, the moving contact of the vacuum switch tube is coaxially arranged with the driving mechanism, the pull block assembly and the elastic switching-on/off assembly.
Preferably, the elastic switching-on/off assembly comprises an overtravel spring.
Preferably, the pull block assembly is radially provided with an interlocking hole for mechanically interlocking the plurality of vacuum contactors when the plurality of vacuum contactors are used in combination.
On the other hand, the multi-pole vacuum contactor is also provided, and the multi-pole vacuum contactor is formed by combining a plurality of coaxial single-pole vacuum contactors.
The utility model discloses following beneficial effect has: during switching-on action, the driving mechanism receives a switching-on signal, drives the pull block assembly to axially move towards the direction of the vacuum switch tube, and applies thrust to a moving contact of the vacuum switch tube after the elastic switching-on and switching-off assembly compresses the elastic switching-on and switching-off assembly, and the moving contact is in contact conduction with a fixed contact under the action of the thrust to complete the switching-on action; when the brake is opened, the driving mechanism receives a brake opening signal and drives the pull block assembly to move axially away from the direction of the vacuum switch tube, the pull block assembly absorbs the compression of the elastic brake closing and opening assembly in a closing state through a certain idle stroke and then acts on the moving contact, and the moving contact is separated from the static contact under the action of tension to complete the brake opening action;
in the coaxial single-pole vacuum contactor, the pull block assembly is arranged in the vacuum contactor and is coaxially arranged with the vacuum switch tube, the driving mechanism and the elastic switching-on and switching-off assembly, all the action parts are positioned on the same axis, and the pull block assembly replaces the existing lever crank arm 11 structure, so that the structure of the single-pole vacuum contactor has no moment amplification and radial stress, is coaxially driven by the driving mechanism, has a shortened stroke, effectively improves the switching-on and switching-off speed (the switching-on and switching-off time is less than 10 ms), and improves the stability of the device; meanwhile, the pulling block assembly is matched with the elastic switching-on/off assembly, the switching-off driving force is improved from the spring elasticity of the original structure to the combined action of the driving mechanism pulling force and the elasticity on the moving contact, and the switching-off capacity is improved to a greater degree.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic diagram of a conventional three-pole vacuum contactor;
fig. 2 is a cross-sectional view of a single pole vacuum contactor according to a preferred embodiment of the present invention;
fig. 3 is a schematic diagram of the opening state of the preferred embodiment of the present invention;
fig. 4 is a schematic diagram of a closing state according to the preferred embodiment of the present invention;
fig. 5 is a schematic view of a single pole vacuum contactor according to a preferred embodiment of the present invention;
fig. 6 is a schematic view of a single pole vacuum contactor according to a preferred embodiment of the present invention;
fig. 7 is a 3-pole vacuum contactor according to a preferred embodiment of the present invention;
fig. 8 is a 5-pole reversible vacuum contactor according to a preferred embodiment of the present invention;
1. the control device comprises a control module 2, a permanent magnet cylinder 21, a shell 22, an iron core 23, a first coil 24, a permanent magnet 25, a second coil 3, a tension sensor 4, an outlet pole 5, a pull block 51, an interlocking hole 52, a limiting protrusion 6, an over-travel spring 7, an upper cover 8, a vacuum switch tube 81, a moving contact 82, a static contact 9, a shell 10, an inlet pole 11, a lever crank arm
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 2 to 6, a preferred embodiment of the present invention provides a coaxial single-pole vacuum contactor, including a vacuum switch tube 8, a moving contact 81 of the vacuum switch tube 8 is electrically connected to a wire outlet pole 4, a static contact 82 of the vacuum switch tube 8 is electrically connected to a wire inlet pole 10, the moving contact 81 is used for moving and then is in contact connection with or disconnected from the static contact 82, and the vacuum contactor includes a driving mechanism, a pull block assembly, an elastic switching on/off assembly and the vacuum switch tube 8, which are sequentially connected in an axial direction;
the driving mechanism is used for receiving a closing signal to drive the pull block assembly to move axially, and the pull block assembly moves axially and drives the vacuum switch tube 8 to close through the elastic closing and opening assembly; the driving mechanism is used for receiving a brake opening signal to drive the pull block assembly to axially move, and the pull block assembly axially moves and drives the vacuum switch tube 8 to perform brake opening action through the elastic brake opening and closing assembly;
the elastic switching-on and switching-off component is used for absorbing the excess stroke exceeding the switching-on stroke and/or the switching-off stroke of the vacuum switch tube 8 when the pulling block component moves axially;
specifically, the moving contact 81 of the vacuum switch tube 8 is coaxially arranged with the driving mechanism, the pull block assembly and the elastic switching-on/off assembly; the elastic switching-on/off brake component in the embodiment is specifically an over-travel spring 6;
it should be understood that the vacuum contactor comprises a shell 9 and an upper cover 7, and the driving mechanism, the pull block assembly, the elastic switching on and off assembly and the vacuum switch tube 8 are arranged on the shell 9;
the working principle of the single-pole vacuum contactor is as follows:
during the switching-on action, the driving mechanism receives a switching-on signal, drives the pull block assembly to axially move towards the direction of the vacuum switch tube 8, the elastic switching-on and switching-off assembly compresses the elastic switching-on and switching-off assembly, then the thrust acts on the moving contact 81 of the vacuum switch tube 8, and the moving contact 81 is in contact conduction with the static contact 82 under the action of the thrust, so that the switching-on action is completed;
during the switching-off action, the driving mechanism receives a switching-off signal and drives the pull block assembly to move axially away from the vacuum switch tube 8, the pull block assembly absorbs the compression of the elastic switching-on and switching-off assembly in the switching-on state through a certain idle stroke and then acts on the moving contact 81, the moving contact 81 is separated from the static contact 82 under the action of the tensile force, and the switching-off action is completed;
in the coaxial single-pole vacuum contactor, the pull block assembly is arranged in the vacuum contactor and is coaxially arranged with the vacuum switch tube 8, the driving mechanism and the elastic switching-on and switching-off assembly, all the action parts are positioned on the same axis, and the pull block assembly replaces the existing lever crank arm 11 structure, so that the structure of the single-pole vacuum contactor has no moment amplification and no radial stress, is coaxially driven by the driving mechanism, has a shortened stroke, effectively improves the switching-on and switching-off speed (the switching-on and switching-off time is less than 10 ms), and improves the stability of the device; meanwhile, the driving force of the opening brake is improved from the spring elasticity of the original structure to the combined action of the driving mechanism tension and the elasticity on the moving contact 81 by matching with the elastic opening and closing brake component, so that the opening brake capacity is improved to a greater extent.
Further, the driving mechanism comprises a control module 1 and a permanent magnet cylinder 2 coaxially arranged with the pulling block assembly, wherein the control module 1 is used for receiving a switching-on signal or a switching-off signal to control the magnetic field direction of an iron core 22 in the permanent magnet cylinder 2, so that the iron core 22 axially moves to a corresponding end;
specifically, the permanent magnet cylinder 2 of the present embodiment includes a housing 21, an inner cavity is formed in the housing 21, and an iron core 22 is disposed in the inner cavity and can axially move and is in driving connection with the pull block assembly; a permanent magnet 24 is arranged in the middle of the inner wall of the inner cavity, and the iron core 22 is kept to abut against the inner wall of the first end face of the shell 21 or abut against the inner wall of the second end face of the shell 21 under the action of the permanent magnet 24; a first coil 23 electrically connected with the control module 1 is arranged on the inner wall of the first end of the inner cavity, and a second coil 25 electrically connected with the control module 1 is arranged on the inner wall of the second end of the inner cavity; under the condition that the first coil 23 and the second coil 25 are not electrified, the iron core 22 can be stably kept at any end of the inner cavity under the magnetic force of the permanent magnet 24 arranged in the middle of the inner cavity; when the iron core 22 is at the first end of the inner cavity and needs to be changed to the second end, the second coil 25 is electrified, the current direction is controlled to enable the electromagnetic field generated at the first coil 23 to be opposite to the magnetic field generated by the permanent magnet 24, the second magnetic density area at the position is weakened, meanwhile, the first coil 23 is electrified, the current direction is controlled to enable the electromagnetic field generated by the first coil 23 to be the same as the magnetic field generated by the permanent magnet 24, the magnetic field effect of the first magnetic density area at the position is strengthened, namely, the magnetic circuit balance state of the iron core 22 is broken, and the iron core 22 moves from the second magnetic density area to the first magnetic density area under the action of the unbalanced state of the two magnetic density areas to finish the movement from the first end to the second end; the same applies to the movement of the core 22 from the second end to the first end; a double-magnetic-density area is formed in the permanent magnet cylinder 2 through the single permanent magnet 24, the fixed end of the iron core 22 can be controlled and changed by changing the current direction of the coil, the driving force requirement is low, and the first end state and the second end state do not need to be kept by current, so that the energy consumption is low; the whole structure is simple, the control mode is simple, the installation and debugging are simple, and the cost is effectively reduced; in addition, the permanent magnet cylinder 2 and the vacuum contactor are coaxially driven, mechanical rotation or friction stress parts are omitted, and the service life of the machine is greatly prolonged.
Furthermore, the pulling block assembly comprises a tension sensor 3 and a pulling block 5, wherein the first end of the tension sensor 3 is connected with the output end of the permanent magnet cylinder 2, and the second end of the tension sensor is connected with the first end of the pulling block 5; the tension sensor 3 is electrically connected with the control module 1; the second end of the pull block 5 is connected with the elastic switching-on/off assembly, the vacuum degree of the vacuum switch tube 8 can be detected through the tension sensor 3, and then whether the switching-on/off of the vacuum switch tube 8 is reliable or not is judged, and the vacuum degree is fed back to the control module 1, so that safety guarantee is improved.
Specifically, the elastic switching-on/off brake component also comprises a stud; a sliding hole is axially formed in the second end of the pulling block 5, a stroke cavity is formed in the middle of the pulling block 5, the stud penetrates through the sliding hole, and the large end of the stud is arranged in the stroke cavity, so that the stud can axially move in the range of the stroke cavity and is limited in the axial movement stroke through the stroke cavity; a nut is screwed into the small end of the stud, and the small end of the stud is in threaded connection with the moving contact 81; an overtravel spring 6 is arranged between the first end surface of the nut and the second end surface of the pull block 5, and the second end surface of the nut is attached to the end surface of the moving contact 81;
namely, during the closing action, the pulling block 5 axially moves towards the vacuum switch tube 8, the pulling block 5 compresses the overtravel spring 6 until the first end face of the stroke cavity abuts against the large end of the stud, the spring force and the thrust of the permanent magnet cylinder 2 simultaneously act on the moving contact 81 of the vacuum switch tube 8, and the moving contact 81 is in contact conduction with the static contact 82 under the action of the spring force and the thrust to complete the closing action; during the brake-separating action, the pull block component moves axially away from the vacuum switch tube 8, absorbs the compression of the over-travel spring 6 through a certain idle travel, then the second end of the travel cavity abuts against the large end of the stud, finally the stud acts on the moving contact 81, the moving contact 81 is separated from the static contact 82 under the action of elasticity and tension, and the brake-separating action is completed;
therefore, the pull block assembly is matched with the over-travel spring 6, so that the brake opening and closing function capacity is improved.
Furthermore, the pull block assembly is radially provided with interlocking holes 51 for mechanical interlocking through the interlocking holes 51 when a plurality of vacuum contactors are used in a combined manner, so that the pull block assembly has multiple combined application modes and strong practicability; during specific operation, rod pieces such as screw rods or pin rods with adaptive lengths sequentially penetrate through the interlocking holes of the pull block assemblies with target number and then the two ends of the pull block assemblies are locked or limited and fixed, so that the interlocking of the coaxial single-pole vacuum contactors is completed.
In some embodiments, the housing 9 is provided with a limiting opening, and a limiting protrusion 52 extending out of the limiting opening from the inside of the housing 9 is formed in the radial direction of the side wall of the pull block assembly in a protruding manner, so as to limit the stroke of the pull block assembly.
On the other hand, the embodiment of the utility model also provides a 3 utmost point conventional vacuum contactor, including 3 aforementioned monopole vacuum contactors, through the member pieces such as screw rod or pin rod of length adaptation, pass the interlocking hole 51 of each monopole vacuum contactor in proper order and establish ties with it, realize its three-phase synchronism, reduce moment and enlarge, improve and close separating brake speed and reliability; in addition, the permanent magnetic cylinders 2 of the 3 single-pole vacuum contactors can be arranged to be mutually redundant, and the reliability of the device is further improved.
On the other hand, as shown in fig. 8, the embodiment of the present invention further provides a 5-pole reversible contactor, which includes 5 aforementioned single-pole vacuum contactors, and the mechanical interlocking of the reversible contactor is realized through each single-pole vacuum contactor interlocking hole 51;
in other embodiments, the single-pole vacuum contactor may be used to form a 2-pole single-phase contactor, a 4-pole single-phase reversible contactor, a 6-pole double-control contactor, or the like, and the single-pole vacuum contactor may be used to freely combine a desired number of poles, thereby widening the application range.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A coaxial single-pole vacuum contactor comprises a vacuum switch tube (8), wherein a moving contact (81) of the vacuum switch tube (8) is electrically connected with a wire outlet pole (4), a static contact (82) of the vacuum switch tube (8) is electrically connected with a wire inlet pole (10), and the moving contact (81) is used for moving and further is in contact connection with or disconnection with the static contact (82), and is characterized by comprising a driving mechanism, a pull block assembly, an elastic switching-on and switching-off assembly and the vacuum switch tube (8) which are sequentially connected along the axial direction;
the driving mechanism is used for receiving a switching-on signal to drive the pull block assembly to move axially, and the pull block assembly moves axially and drives the vacuum switching tube (8) to switch on through the elastic switching-on and switching-off assembly; the driving mechanism is used for receiving a brake opening signal to drive the pull block assembly to move axially, and the pull block assembly moves axially and drives the vacuum switch tube (8) to perform brake opening action through the elastic brake opening and closing assembly;
the elastic switching-on/off assembly is used for absorbing the redundant stroke exceeding the switching-on stroke and/or the switching-off stroke of the vacuum switch tube (8) when the pull block assembly moves axially.
2. The coaxial unipolar vacuum contactor according to claim 1, wherein the driving mechanism includes a control module (1) and a permanent magnet cylinder (2) coaxially disposed with the pull block assembly, the control module (1) is configured to receive a switching-on signal or a switching-off signal to control a magnetic field direction of an inner core (22) of the permanent magnet cylinder (2).
3. A coaxial homopolar vacuum contactor according to claim 2, characterized in that the permanent magnet cylinder (2) comprises a housing (21), an inner cavity being formed in the housing (21), an iron core (22) being arranged in the inner cavity axially movable and in driving connection with the pull block assembly; a permanent magnet (24) is arranged in the middle of the inner wall of the inner cavity, and the iron core (22) is kept in contact with the inner wall of the first end face of the shell (21) or the inner wall of the second end face of the shell (21) under the action of the permanent magnet (24); the inner wall of the first end of the inner cavity is provided with a first coil (23) electrically connected with the control module (1), and the inner wall of the second end of the inner cavity is provided with a second coil (25) electrically connected with the control module (1).
4. A coaxial homopolar vacuum contactor according to claim 2, characterized in that the pull block assembly comprises a tension sensor (3) and a pull block (5), the tension sensor (3) having a first end connected to the output of the permanent magnet cylinder (2) and a second end connected to the first end of the pull block (5); the tension sensor (3) is electrically connected with the control module (1); the second end of the pull block (5) is connected with the elastic switching-on/off component.
5. The coaxial unipolar vacuum contactor according to claim 1, wherein the vacuum contactor further comprises a housing (9), the drive mechanism, the pull block assembly, the resilient opening and closing assembly and the vacuum switch tube (8) being mounted to the housing (9).
6. The coaxial monopole vacuum contactor as claimed in claim 5, wherein the outer shell (9) is provided with a limiting opening, and a limiting protrusion (52) protruding from the inside to the outside of the outer shell (9) is formed on the side wall of the pull block assembly in a radial protruding manner to limit the stroke of the pull block assembly.
7. The coaxial unipolar vacuum contactor as claimed in any one of claims 1 to 6, wherein the movable contact (81) of the vacuum switch tube (8) is coaxially arranged with the driving mechanism, the pull block assembly, the elastic switching assembly.
8. Coaxial monopole vacuum contactor according to any of claims 1-6, characterized in that said elastic switching on and off assembly comprises an overtravel spring (6).
9. A coaxial homopolar vacuum contactor as claimed in any one of claims 1-6 wherein said pull block assembly is radially perforated with interlocking holes (51) for mechanical interlocking through said interlocking holes (51) when a plurality of said vacuum contactors are used in combination.
10. A multi-pole vacuum contactor, characterized by being composed of a plurality of coaxial single-pole vacuum contactors as claimed in claim 9 in combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221692355.8U CN218730638U (en) | 2022-07-01 | 2022-07-01 | Coaxial single-pole vacuum contactor and multi-pole vacuum contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221692355.8U CN218730638U (en) | 2022-07-01 | 2022-07-01 | Coaxial single-pole vacuum contactor and multi-pole vacuum contactor |
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| Publication Number | Publication Date |
|---|---|
| CN218730638U true CN218730638U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221692355.8U Active CN218730638U (en) | 2022-07-01 | 2022-07-01 | Coaxial single-pole vacuum contactor and multi-pole vacuum contactor |
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| Country | Link |
|---|---|
| CN (1) | CN218730638U (en) |
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- 2022-07-01 CN CN202221692355.8U patent/CN218730638U/en active Active
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