CN208433335U - Earthing switch - Google Patents
Earthing switch Download PDFInfo
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- CN208433335U CN208433335U CN201820726320.9U CN201820726320U CN208433335U CN 208433335 U CN208433335 U CN 208433335U CN 201820726320 U CN201820726320 U CN 201820726320U CN 208433335 U CN208433335 U CN 208433335U
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- moving contact
- earthing
- earthing switch
- contact
- frame
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Abstract
The utility model provides a kind of earthing switch, comprising: frame；Fixed static contact on said frame；The rotary shaft of arrangement on said frame；Moving contact corresponding with the static contact, one end of the moving contact are fixed in the rotary shaft；Wherein, the earthing switch further includes spring mechanism, is configured to discharge elastic potential energy in the making process of the earthing switch to drive the moving contact to move towards the static contact；It further include the support rod made of light material, in such a way that the collecting pipe is spaced through setting between the multiple moving contact；And earthing bar.The utility model provides the earthing switch that a kind of stability is good, rigidity is high, closing speed is fast as a result,.
Description
Technical field
The utility model relates to high-tension switch cabinet fields, and in particular to a kind of earthing switch.
Background technique
Earthing switch is a kind of mechanical switch with the specific use for centainly closing short circuit current ability.It is used for
By switch-cabinet grounding when high-tension switch cabinet and its line maintenance, personal safety is protected.In addition, since there may be short circuits in circuit
Failure, earthing switch need rapidly by switch-cabinet grounding, to eliminate the fault electric arc in switchgear.
As the voltage class of high-tension switch cabinet constantly increases, it is desirable that the closing speed of earthing switch is getting faster.?
When carrying out short circuit closing and dynamic heat test to existing high-tension switch cabinet, discovery is made since the moving contact length assembled is too long
At the moving contact poor rigidity assembled.This results in following unfavorable phenomenons: moving contact can be caused to reverse when closing a floodgate, and cause three
Mutually not same period, lead to test failure.Therefore, the structure design of existing earthing switch is not able to satisfy current high-tension switch cabinet pair
In the composite request of stability, rigidity, closing speed and saving material etc..
Therefore, there are still provide a kind of demand for the earthing switch that stability is good, rigidity is high, closing speed is fast in industry.
Utility model content
The utility model be intended to provide it is a kind of can at least be partially solved the above-mentioned prior art it is various it is insufficient ground connection open
It closes.
One aspect according to the present utility model provides a kind of earthing switch, including: frame；It is fixedly attached to
Multiple static contacts on the frame；The rotary shaft of arrangement on said frame；It is corresponding with the multiple static contact multiple dynamic
Contact, the multiple moving contact is with one end of which is fixed in the rotary shaft, and the multiple moving contact is via through setting
The collecting pipe set therebetween is connected to each other；Spring mechanism is configured to discharge bullet in the making process of the earthing switch
Property potential energy is to drive the moving contact to move towards the static contact；The wherein earthing switch further include: by light material system
At support rod, in such a way that the collecting pipe is spaced through be arranged between the multiple moving contact；And it connects
Ground row, is arranged at outermost two moving contacts in the multiple moving contact, one end of the earthing bar is with conductance
Logical mode is connected to the collecting pipe and the other end is fixedly attached to the support rod, and the earthing bar is set near the other end
It is equipped with the connector for earth cord connection.
Compared with existing earthing switch, the earthing switch of the utility model is additionally arranged for stablizing the moving contact after assembling
Support rod, wherein the support rod with for connect multiple moving contacts collecting pipe interval be arranged, ensure that earthing switch
There is desired insulation distance after switchgear, and ensure that the stability of the moving contact after assembly.Due to the support rod
It is made, therefore the closing speed of earthing switch can't be impacted of light material.Further, by earthing switch
Earthing bar is added in two sides, to shorten the length of the earth cord conducted with moving contact as much as possible, on the one hand mitigate
On the other hand the quality of moving contact assembly also avoids to increase closing speed and causes itself to put since earth cord length is excessive
The dynamic adverse effect to intensity.
In a preferred embodiment, the light material is selected from the group as composed by aluminium alloy, magnesium alloy and nylon.
Thus, it is possible to the support rod be manufactured with cheap cost, to control the totle drilling cost of earthing switch.
In a preferred embodiment, the spacing distance between the support rod and the collecting pipe and the earthing bar
Same length.Thus, it is possible to simply determine the spacing distance between support rod and collecting pipe.
In a preferred embodiment, the multiple moving contact is the first moving contact arranged in parallel, the second moving contact
With third moving contact；The collecting pipe is to be made of copper through what the first moving contact, the second moving contact and third moving contact were arranged
Confluence copper pipe.
In a preferred embodiment, the frame includes: pedestal in a rectangular parallelepiped shape, and the static contact is fixedly connected
To the pedestal；Along multiple side plates of pedestal longitudinal gap setting, the rotary shaft passes through the multiple side plate；Wherein,
The spring mechanism and the moving contact are located in the accommodation space for the rectangular-shape that the multiple side plate and the pedestal limit.
Completely new earthing switch frame structure is provided as a result,.
In a preferred embodiment, the frame further includes the multiple supports for being located at the side of corresponding side plate
Plate, on the base, one end of the spring mechanism passes through the first rotation axis connection for one end welding of the support plate
To the other end of the support plate.The frame structure for manufacturing the earthing switch in a welding manner as a result, to reduce this
The manufacture difficulty and cost of earthing switch.
In a preferred embodiment, the spring mechanism include pressure spring and positioned at the pressure spring both ends locating piece and
Drive block, the locating piece are fixed to the other end of the support plate, the spring mechanism by first rotation axis
It is also constructed around the first rotation axis rotary motion, the earthing switch further includes the support being fixed in the rotary shaft
Block, the supporting block are pivotally connected to the drive block by second rotation.Thus, it is possible to be advantageously employed spring mechanism
Energy storage acts on to realize the rapid switch closing and switch opening between moving contact and static contact.
In a preferred embodiment, the moving contact includes: two earthings being oppositely arranged；And it is located at described
Earthing mounting bracket between two earthings has the one end being oppositely arranged and the other end, the earthing installation branch
One end of frame is fixedly connected with described two earthings, and the other end of the earthing mounting bracket is defined for the rotary shaft
The through-hole passed through.Hereby it is achieved that the moving contact structure that a kind of stability is good.
In a preferred embodiment, the static contact via the insulator for being connected to the base frame and is connected to
The static contact support of the insulator is fixedly attached to the frame, and the static contact support is monolithic structure.It is further excellent
Selection of land, the static contact support solid via the insulator for being connected to the base frame and the static contact for being connected to the insulator
Surely it is connected to the frame, the static contact support is monolithic structure.It is supported as a result, by using the static contact of single type
Frame, on the one hand ensure that the synchronism of three-phase, on the other hand increase the support strength of static contact, ensure that static contact installation
Stability.
The closing speed of the earthing switch of the utility model is fast, is able to bear higher short-circuit current, moving contact energy
It is enough reliably contacted with static contact, reliable performance, mechanical life is long.
Detailed description of the invention
The utility model embodiment is described further referring to the drawings, in which:
Fig. 1 is the stereoscopic schematic diagram that earthing switch according to the present utility model is in "on" position.
Fig. 2 is the schematic elevation view that earthing switch according to the present utility model is in "on" position.
Fig. 3 is the schematic top plan view that earthing switch according to the present utility model is in "on" position.
Reference signs list:
10. 3. rotary shaft of earthing switch 1. frame, 2. spring mechanism, 4. support rod
5. 6. moving contact of collecting pipe, 7. static contact, 8. static contact supports 9. earthing bars
11. 12. support plate A1. the first rotation axis the second rotation axis of A2. of side plate
21. 24. supporting block of pressure spring 22. locating piece, 23. drive block, 621. earthing
622. earthing mounting bracket, 71. insulator, 91. connector
Specific embodiment
The exemplary scheme of earthing switch disclosed in the utility model is described in detail in description.Although providing attached
Figure is some embodiments in order to which the utility model is presented, but attached drawing need not be drawn by the size of specific embodiment, and
Certain features can be amplified, remove or disclosure to be better shown and explain the utility model is cutd open by office.Portion in attached drawing
Divide component that can carry out according to actual needs position adjustment under the premise of not influence technique effect.The phrase occurred in the description
" in the accompanying drawings " or similar term need not refer to all attached drawings or example.
Hereinafter be used to describe certain directional terminologies of attached drawing, for example, "front", "rear", "inner", "outside", " on
Side ", " lower section " and other directional terminologies, it will accordingly be understood that for its normal meaning and criticize it is normal see attached drawing when it is related
Those directions.Except as otherwise indicating, directional terminology described in this specification is substantially according to routine understood by one of ordinary skill in the art
Direction.
Term " first " used in the utility model, " second " and its similar terms, in the present invention not
Indicate any sequence, quantity or importance, but for distinguishing a component with other components.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, pass through tool below in conjunction with attached drawing
The utility model is further described in body embodiment.
Fig. 1-3 is the three-dimensional signal that "on" position is according to the earthing switch of the utility model preferred embodiment respectively
Figure, schematic elevation view and schematic top plan view.As shown in Figure 1, earthing switch includes frame 1, the rotary shaft 3 being mounted on frame 1,
The multiple static contacts 7 being sequentially arranged along the axis of rotary shaft 3, these static contacts are for example supported via insulator 71 and static contact
8 are fixedly attached to frame 1, corresponding with these static contacts 7 respectively and for example preferably arranged in mode arranged in parallel multiple
Moving contact 6, and the spring mechanism 2 being located between frame 1 and multiple moving contacts.Wherein spring mechanism 2 be in separating brake
The moving contact 6 of position is substantially in the same plane.
Broadly, multiple moving contacts 6 are fixed in rotary shaft 3 with one end of one end and spring mechanism 2, thus bullet
Spring mechanism 2 is respectively used to apply the active force for rotating it to rotary shaft 3, and it is more that this causes rotary shaft 3 to drive in rotary course
A rotary motion together of moving contact 6, to be grounded the combined floodgate and separating brake of switch.
Fig. 2 is the front view of earthing switch shown in FIG. 1.As shown in Fig. 2, frame 1 includes bottom substantially in a rectangular parallelepiped shape
Seat, multiple side plates 11 and the support plate 12 for the side for being located at corresponding side plate 11 on pedestal, 11 He of latus inframedium
Support plate 12 is arranged along the pedestal longitudinal gap in a pair wise manner.Wherein, support plate 12 in a welding manner welds one end
It connects on pedestal.Pairs of side plate 11 and support plate 12 and pedestal collectively define accommodation space in a rectangular parallelepiped shape as a result,.It is right
The spring mechanism 2 and a moving contact 6 that should be arranged are respectively positioned in the accommodation space of the rectangular-shape.Side plate 11 and support plate
12 all have and wear for rotary shaft 2 and in the through-hole wherein rotated.As shown in Fig. 2, non-limiting as example, this is practical
It is novel to show three moving contacts arranged in parallel: the first moving contact, the second moving contact arranged from right to left from Fig. 1-2
With third moving contact.
Herein it may be noted that for the earthing switch 10 in the utility model, wherein the moving contact 6 being arranged in groups,
The structure of static contact 7 and spring mechanism 2 is identical with interaction relationship.Therefore following mainly dynamic with the first of the rightmost side
It is illustrated for contact and the third moving contact of the leftmost side.Those skilled in the art understand that, it is dynamic to be located in the middle second
Contact has same structure.
As shown in Figure 1, the spring mechanism 2 with the third moving contact interaction of the leftmost side includes pressure spring 21, it is located at
The locating piece 22 and drive block 23 at 21 both ends of pressure spring, the guide rod for being arranged inside pressure spring and being connect with locating piece 22, guide rod
One end is fixed on drive block 23.Locating piece 22 by the first rotation axis A1 respectively with side plate 11 and support plate 12 pivotly
Connection enables one end of spring mechanism 2 to rotate by axis of the first rotation axis A1, to realize that releasing for pressure spring 21 can and be stored up
Energy.Drive block 23 is connect by the second rotation axis A2 with supporting block 24.Supporting block 24 has the through-hole passed through for rotary shaft 3, and
It is fixedly connected via the through-hole with rotary shaft 3.Pressure spring 21 in compressive state passes through drive block 23 and 24 pairs of supporting block rotations
Axis 3 applies certain active force.
As shown in Figure 1, rotary shaft 3 sequentially passes through the first moving contact, the through-hole of the second moving contact and third moving contact, spring
The through-hole of mechanism 2.In order to realize the connection of rotary shaft Yu moving contact and spring mechanism, as a kind of non-limiting example, rotation
It can have through-hole corresponding with moving contact 6 and 2 position of spring mechanism in shaft 3.By inserting for the axis perpendicular with rotary shaft 3
Pin is inserted into respectively in these through-holes, to realize being fixedly connected for rotary shaft 3 and moving contact 6 and spring mechanism 2.
Further, as shown in Figure 1, being only illustrated for being located in the middle the second moving contact to the structure of moving contact.
Moving contact 6 includes a pair of of the earthing 621 being oppositely arranged, the earthing mounting bracket 622 between a pair of of earthing 621.
The conducting area of short circuit current can be increased by being arranged in pairs earthing 621, avoid 6 scaling loss of moving contact.Earthing mounting bracket
622 are preferably integrally formed by metal material, have biggish mechanical strength and rigidity.Earthing mounting bracket 622 is with one end
It connect with a pair of of earthing 621, the other end is stretched out between earthing 621, and is had in the other end and worn for rotary shaft 3
Through-hole.Meanwhile in order to guarantee that the electric current in the multiple moving contacts being arranged in Fig. 1-2 has same phase, earthing switch 10 is also wrapped
Include be connected between multiple moving contacts 2 be preferably copper pipe collecting pipe 5, wherein as shown in figure, the collecting pipe 5 through this
One moving contact, the second moving contact and the setting of third moving contact are thus by first moving contact, the second moving contact and third moving contact
Electrical connection, so that first moving contact, the second moving contact and third moving contact phase having the same, so that it is guaranteed that will not go out
Show three-phase not same period phenomenon.
At the position of the earthing mounting bracket 622 far from 5 one fixed spacing of collecting pipe, set with being parallel to the collecting pipe 5
The mode set is equipped with support rod 4 made of light material, which is selected from and is made of aluminium alloy, magnesium alloy and nylon
Group.Adding support rod made of above-mentioned light material between multiple moving contacts of earthing switch, stabilization can be played
The effect of the assembly of moving contact and the rigidity for improving moving contact thus reduce moving contact and undesirable touching occur in operation
Head torsion simultaneously and then leads to the asynchronous possibility of three-phase.Also, due to support rod be made of using light material, can't be right
The heavy amount of moving contact and the gravity centre distribution of multiple moving contacts affect, so as to set not original to earthing switch
In the case that meter structure is changed, still guarantee the switch closing and switch opening speed of earthing switch.
It is in the first dynamic touching for the present embodiment meanwhile at outermost two moving contacts in multiple moving contacts
It is respectively arranged with earthing bar 9 at head and third moving contact, which is, for example, to be parallel to the arrangement of earthing mounting bracket 622
Conductive metal sheet.One end of the earthing bar 9 is connected to the collecting pipe 5 in a manner of conducting and the other end is fixedly attached to this
Support rod 4 made of light material.In other words, the length of the spacing distance between the support rod 4 and collecting pipe 5 and earthing bar is big
It causes identical.Further, which is provided with the connector for earth cord connection near its other end.As a result, for
The earth cord that switchgear carries out ground connection operation will no longer be directly connected to the remittance being arranged far from pedestal 1 as prior art
Flow tube 5, but it is alternatively real via the connector on the earthing bar 9 conducted with the collecting pipe 5 at the position closer to pedestal 1
Now with the electrical connection of earthing switch.Based on this, can shorten for realizing the ground connection operation between earthing switch and switchgear
The radius of gyration of the length and earth cord of required earth cord in switchgear.This is so as to avoid due to earthing switch
When separating brake and closing operation, earth cord caused by the flexible cord amplitude of fluctuation brought by too long earth cord is excessive
Intensity decline and reduced service life.Flexible cord is also avoided simultaneously, and the not phase occurs with other components of switchgear during the motion
The interference of prestige.Finally, due to which the length of earth cord shortens, it can be reduced the quality for being attached to the component of moving contact and then subtract
The quality of the light moving contact assembled, to increase the separating brake and closing speed of moving contact.
It is also shown in Fig. 2 via the insulator 71 for being connected to pedestal and the static contact for being connected to the insulator 71 support
8 are fixedly attached to the static contact 7 of frame.Wherein static contact support is monolithic structure.Preferably, static contact support is one
Body casts to be formed.From weld or rivet by muti-piece metal plate in the prior art made of static contact support it is different, this is practical
No matter static contact support in novel is obviously improved in terms of rigidity or support strength.Using the quiet of such as the utility model
8 one side of contact-support ensure that the three-phase synchronism of moving contact, on the other hand also ensure the stability of static contact installation.
Illustrate the making process of the earthing switch of above-described embodiment below with reference to Fig. 1-3.
When carrying out closing operation, rotary shaft 3 is made to rotate lesser angle clockwise first.Rotary shaft 3 is driven
The supporting block 24 of dynamic first, second, and third moving contact and corresponding spring mechanism 2 is revolved clockwise together
Transhipment is dynamic, wherein the guide rod of each spring mechanism 2 rotates lesser angle respectively around the second rotation axis A2.When rotating to so that
When the axis of first and second rotation axis and rotary shaft 3 is located substantially on same plane, spring mechanism 2 is in dead-centre position, i.e.,
The direction for the active force that each spring mechanism 2 applies rotary shaft 3 is just past rotary shaft 3, and at this time first, the of earthing switch
Two and third moving contact be in the critical localisation of unstable state.
It is further rotated in a clockwise direction rotary shaft 3, so that the axis of the first and second rotation axis and rotary shaft 3 is no longer
It keeps in a plane.This makes the first, second, and third moving contact rotate through its critical localisation.Release rotation later
Axis 3 no longer applies the active force for rotating it to rotary shaft 3.The work that rotary shaft 3 is applied by each spring mechanism 2 at this time
It firmly enables to rotary shaft 3 to continue around its axis to be rotated in a clockwise direction, rotary shaft 3 continues driving first, second and the
Three moving contacts are rotated in a clockwise direction, until ensuring that the first, second, and third moving contact steadily closes a floodgate.In making process
In, each spring mechanism 2 discharges the elastic potential energy of its storage and is converted to rotary shaft 3 and the rotation of the first, second, and third moving contact
The kinetic energy turned, so that the first, second, and third moving contact 6 is moved towards its corresponding static contact 7.
Fig. 1 shows the stereoscopic schematic diagram that earthing switch is in "on" position.As shown in Figure 1, spring mechanism 2 has been in
De-energized state, corresponding static contact 7 is in contact the first, second, and third moving contact 6 respectively.It will be apparent that first and
Two rotation axis the axis with rotary shaft 3 in Different Plane.Via above description it is not difficult to find out that, due to dead by it in spring
Point postpones, by discharge its elastic potential energy make moving contact group rapidly close a floodgate completion ground connection.Therefore the ground connection of the utility model is opened
The closing speed of pass is fast, is able to bear higher short-circuit current, and moving contact can be contacted reliably with static contact, and performance can
It leans on, mechanical life is long.
In separating brake, rotary shaft 3 is rotated along the direction opposite with making process, rotary shaft 3 makes during rotation
It obtains the first, second, and third moving contact and distinguishes corresponding 7 phase of static contact separation, while driving 23 compression press spring 21 of drive block
Make its energy storage.Finally the first, second, and third moving contact and spring mechanism 2 is made to be in open position.
Although the utility model has been described by means of preferred embodiments, the utility model is not limited to this
In described embodiment, further include made various changes and change in the case where not departing from the scope of the utility model
Change.
Claims (10)
1. a kind of earthing switch, comprising:
Frame；
The multiple static contacts being fixedly attached on the frame；
The rotary shaft of arrangement on said frame；
Multiple moving contacts corresponding with the multiple static contact, the multiple moving contact is with one end of which is fixed on the rotary shafts
On, and the multiple moving contact is connected to each other via through the collecting pipe being disposed there between；
Spring mechanism is configured to discharge elastic potential energy in the making process of the earthing switch to drive the moving contact
It is moved towards the static contact；
It is characterized in that, the earthing switch further include:
The support rod made of light material, by with the collecting pipe it is spaced in a manner of through setting the multiple dynamic
Between contact；And
Earthing bar is arranged at outermost two moving contacts in the multiple moving contact, one end of the earthing bar
It is connected to the collecting pipe in a manner of conducting and the other end is fixedly attached to the support rod, the earthing bar is in the other end
Nearby it is provided with the connector for earth cord connection.
2. earthing switch according to claim 1, which is characterized in that the light material is selected from by aluminium alloy, magnesium alloy
With group composed by nylon.
3. earthing switch according to claim 1, which is characterized in that the spacing between the support rod and the collecting pipe
With the same length of the earthing bar.
4. earthing switch according to claim 1, which is characterized in that the multiple moving contact is arranged in parallel first dynamic
Contact, the second moving contact and third moving contact, the collecting pipe are through the first moving contact, the second moving contact and third moving contact
The confluence copper pipe being made of copper being arranged.
5. earthing switch according to claim 1, which is characterized in that the frame includes:
Pedestal in a rectangular parallelepiped shape, the static contact are fixedly attached to the pedestal；
Along multiple side plates of pedestal longitudinal gap setting, the rotary shaft passes through the multiple side plate；
Wherein, the spring mechanism and the moving contact are located at the appearance for the rectangular-shape that the multiple side plate and the pedestal limit
It receives in space.
6. earthing switch according to claim 5, which is characterized in that the frame further includes being located at corresponding side plate
Side multiple support plates, on the base, one end of the spring mechanism passes through for one end welding of the support plate
One rotation is pivotally connected to the other end of the support plate.
7. earthing switch according to claim 6, which is characterized in that the spring mechanism include pressure spring and be located at the pressure
The locating piece and drive block at spring both ends, the locating piece are fixed to the described another of the support plate by first rotation axis
End, the spring mechanism are also constructed around the first rotation axis rotary motion, and the earthing switch further includes being fixed on institute
The supporting block in rotary shaft is stated, the supporting block is pivotally connected to the drive block by the second rotation.
8. earthing switch according to any one of claim 1 to 7, which is characterized in that the moving contact includes:
Two earthings being oppositely arranged；And
Earthing mounting bracket between described two earthings has the one end being oppositely arranged and the other end, described
One end of earthing mounting bracket is fixedly connected with described two earthings, and the other end of the earthing mounting bracket defines
The through-hole passed through for the rotary shaft.
9. earthing switch according to any one of claim 1 to 7, which is characterized in that the static contact is via being connected to
The insulator of the frame and the static contact support for being connected to the insulator are fixedly attached to the frame, the static contact branch
Support is monolithic structure.
10. earthing switch according to claim 9, which is characterized in that the static contact support is integrated casting and is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820726320.9U CN208433335U (en) | 2018-05-15 | 2018-05-15 | Earthing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820726320.9U CN208433335U (en) | 2018-05-15 | 2018-05-15 | Earthing switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208433335U true CN208433335U (en) | 2019-01-25 |
Family
ID=65103541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820726320.9U Active CN208433335U (en) | 2018-05-15 | 2018-05-15 | Earthing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208433335U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022226693A1 (en) * | 2021-04-25 | 2022-11-03 | Abb Schweiz Ag | Earthing switch for switchgear and associated switchgear |
-
2018
- 2018-05-15 CN CN201820726320.9U patent/CN208433335U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022226693A1 (en) * | 2021-04-25 | 2022-11-03 | Abb Schweiz Ag | Earthing switch for switchgear and associated switchgear |
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