CN113394038A

CN113394038A - Isolating switch and contact mechanism thereof

Info

Publication number: CN113394038A
Application number: CN202110567046.1A
Authority: CN
Inventors: 袁高普; 王阅; 施长云
Original assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Current assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-09-14
Anticipated expiration: 2041-05-24
Also published as: CN113394038B

Abstract

The invention discloses an isolating switch and a contact mechanism thereof, wherein the contact mechanism comprises a contact pole base body, a movable contact base, a movable contact and a fixed contact, the fixed contact is fixedly arranged on the contact pole base body, the movable contact base is rotatably supported on the contact pole base body, the movable contact is fixedly arranged on the movable contact base, the movable contact base is provided with an upper base plate and a lower base plate, an air pushing block is arranged between the upper base plate and the lower base plate, the air pushing block extends from the center of the movable contact base to the edge of the movable contact base so as to form a cavity with the air channel walls of the upper base plate, the lower base plate and the contact pole base body when the movable contact is in a closed position, and the air pushing block pushes air to flow in an air channel of the isolating switch when the movable contact rotates. The invention can improve the performance of the isolating switch product.

Description

Isolating switch and contact mechanism thereof

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an isolating switch, a mechanism and a component thereof, and more particularly relates to an isolating switch and a contact mechanism thereof.

Background

The photovoltaic inverter is generally required to be provided with a rotary isolating switch, the rotary isolating switch is provided with a contact pole and a mechanism pole, the contact pole is composed of a plurality of coaxial moving contacts and fixed contacts, the moving contacts and the fixed contacts are correspondingly connected to a wiring terminal, and the mechanism pole is in clutch connection with the fixed contacts through rotation of a driving contact, so that switching-on and switching-off of a circuit system are realized.

At present, with the development of economic society, the application scenes of the isolating switch are more and more extensive, the performance is better and better, and the shortcomings still exist. For example, the mechanism stage adopts a motor to rotate forward and backward to simulate manual brake opening, the driving devices of the mechanism stage are all motors, the brake opening time of the mechanism stage reaches 0.5 second, the mechanism stage does not meet the requirement of quick breaking, and the mechanism stage is not suitable for remote operation. In addition, the arc extinguishing is carried out on the contact pole by adding the arc extinguishing chamber and the permanent magnet, but the defects of inaccurate magnetic pole correspondence of the permanent magnet, unreasonable position arrangement of the arc extinguishing chamber and the like exist generally, and the arc extinguishing effect is not ideal. In addition, the contact electrode has the problems of poor consistency of action of each layer, insufficient durability of the movable contact piece and the like.

In view of the technical shortcomings of the existing disconnecting switch products, a new disconnecting switch and a new mechanism are needed to solve at least the above technical problems.

Disclosure of Invention

The present invention aims to solve at least one of the above-mentioned drawbacks of the prior art in order to improve the performance of the disconnector.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the utility model provides a contact mechanism, including the contact polar seat body, move the contact seat, moving contact and static contact, static contact fixed mounting is in the contact polar seat body, the moving contact seat rotationally supports in the contact polar seat body, moving contact fixed mounting is in moving the contact seat, the moving contact seat has upper panel and lower panel, set up the air pushing block between upper panel and the lower panel, the air pushing block extends to the edge of moving contact seat from the moving contact seat central authorities, so that the air pushing block forms the cavity with the upper panel when the moving contact is in the closed position, the air flue wall of lower panel and contact polar seat body, and the air pushing block promotes gas and flows at isolator gas channel when the moving contact is rotatory.

Furthermore, the moving contact seat is formed by combining a moving contact upper seat and a moving contact lower seat, the moving contact upper seat is provided with an upper seat disc, the moving contact lower seat is provided with a lower seat disc, and the air pushing block is arranged on the upper seat disc/the lower seat disc and is embedded in a pushing block groove of the lower seat disc/the upper seat disc.

Furthermore, the moving contact upper seat buckle and the moving contact lower seat buckle are in oblique angle tight insertion connection, and a positioning lug/groove is arranged between the moving contact upper seat buckle and the moving contact lower seat buckle.

Further, the disconnector gas channel is provided with an arc extinguishing chamber, in which an arc extinguishing grid is arranged.

Further, the gas channel of the isolating switch is provided with a guide opening, wherein a metal net is arranged at the position of the guide opening.

Further, the contact pole seat body is provided with magnets, and each pair of magnets is respectively arranged above and below the closed position of the movable contact piece.

On the basis, the isolating switch comprises a plurality of layers of combined contact mechanisms, wherein contact pole seat bodies of the contact mechanisms of each layer are clamped, and moving contact seats of the contact mechanisms of each layer are inserted.

Further, the movable contacts of the contact mechanisms in each layer are in the same direction in a closed state and are arranged in longitudinal alignment.

Furthermore, the outer wall of the contact pole base body is provided with ribs at the side edge of the static contact so as to increase the creepage distance.

Further, the outer wall of the contact pole base body is provided with a tower cap above the static contact so as to increase the creepage distance.

Compared with the prior art, the embodiment of the invention can achieve at least one of the following technical effects:

1. and the mechanism level performance is improved.

(1) The brake can be quickly switched on and off, and particularly, the brake is switched off through an automatic tripping mechanism; the energy storage buckle in the opening and closing device directly drives the lower buckle to open the brake without passing through the upper buckle, and the opening speed is higher than that of the common energy storage back-off device.

(2) The brake is released by the electromagnet, the brake-separating time driven by the electromagnet meets the requirement of rapid breaking at the millisecond level, and the working conditions of immediate brake separation and the like can be rapidly completed after the switch is closed.

2. The contact pole performance is improved.

(1) The moving contact assembly is provided with a gas pushing block, a cavity is formed for arc extinguishing when the moving contact is closed, and gas is pushed to cool and extinguish arcs in the rotating process of the moving contact; and measures such as gas flow arc extinguishing, arc extinguishing grid arc extinguishing, magnetic blow arc extinguishing, metal mesh cooling arc extinguishing and cooling are comprehensively adopted, so that the arc extinguishing performance of the isolating switch is greatly enhanced.

(2) On one hand, the contact pole is assembled accurately, and the action consistency of each layer is good; on the other hand, the movable contact piece is more durable by optimizing the shape of the movable contact piece and reasonably configuring the riveting point position.

Drawings

FIG. 1 is a schematic view of the whole isolating switch of the present invention;

FIG. 2 is a very schematic view of the mechanism of FIG. 1;

fig. 3 is a schematic view of the opening and closing device and the automatic tripping mechanism thereof shown in fig. 2;

fig. 4 is a second schematic view of the opening and closing device and the automatic tripping mechanism thereof shown in fig. 2;

fig. 5 is a schematic view of a reclosing device and an automatic tripping mechanism thereof in fig. 2;

FIG. 6 is a schematic view of the energy storage buckle shown in FIG. 3;

FIG. 7 is a schematic view of the energy storage buckle shown in FIG. 3;

FIG. 8 is a schematic view of the upper buckle of FIG. 3;

FIG. 9 is a schematic view of the disengaging and disengaging lower snap in FIG. 3;

FIG. 10 is a second view of the separable bottom end stop of FIG. 3;

FIG. 11 is a schematic view of the lower buckle brace of FIG. 3;

FIG. 12 is a schematic view of the lower clasp of FIG. 3;

FIG. 13 is a schematic view of the contact tip of FIG. 1;

FIG. 14 is a schematic view of the contact mechanism of FIG. 13;

fig. 15 is a schematic view of the moving contact assembly of fig. 14;

fig. 16 is a schematic view of the movable contact assembly of fig. 14;

FIG. 17 is a second view of the movable contact assembly of FIG. 14;

FIG. 18 is a front view of FIG. 16;

FIG. 19 is a cross-sectional view A-A of FIG. 18;

FIG. 20 is an exploded view of FIG. 16;

FIG. 21 is a front view of the movable contact assembly of FIG. 20;

FIG. 22 is a top view of FIG. 21;

FIG. 23 is a schematic view of the arc extinguishing device of the contact mechanism of FIG. 13;

FIG. 24 is a top view of FIG. 23;

FIG. 25 is a cross-sectional view B-B of FIG. 24;

fig. 26 is a side view of fig. 23.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but it should not be construed that the scope of the present invention is limited to the embodiments described below.

1 product complete machine

Referring to fig. 1, and to fig. 2 and 13 simultaneously, the overall structure of the disconnector product of the invention is shown. As shown in fig. 1, the disconnector comprises a mechanism pole 100 and a contact pole 200, wherein the mechanism pole 100 is provided with a switching device 100a for driving a contact mechanism 200a of the contact pole 200. Wherein, divide closing operation can manually go on, also can go on automatically: when the manual operation is carried out, the main shaft is rotated through the knob 101; when the automatic opening and closing device is automatic, the opening and closing part is directly driven to realize, wherein the opening and closing action can be realized through an automatic tripping mechanism.

As shown in fig. 1, 2 and 13, the mechanism stage housing 11 is assembled by a housing top cover 11a and a housing base 11b, the housing of the contact pole 200 is composed of multiple stages of contact pole housings 21, the contact pole housings 21 of the respective stages are snap-fitted and fastened, and the contact pole housing 21 at the topmost stage is snap-fitted and fastened with the housing base 11b of the mechanism pole 100, thereby forming a completed isolating switch housing in which relevant mechanisms and components are assembled.

As shown in fig. 1, 2 and 13, the switching device 100a in the mechanism stage 100 is provided with a contact mechanism 200a for connecting and driving the contact pole 200 by a switching lower button 118 as a rotary operation mechanism, wherein the contact mechanism 200a is composed of a plurality of layers of movable contact assemblies 20 and fixed contacts 26, etc., the movable contact assemblies 20 are coaxially connected with each other, and the movable contact assembly 20 at the topmost layer is connected to the switching lower button 118 in the switching device 100 a. Specifically, the method comprises the following steps: the bottom of the opening and closing lower buckle 118 is provided with a lower buckle shaft sleeve 1182, the moving contact upper seat 22 in the top moving contact component 20 is provided with an upper seat shaft 223, and the lower buckle shaft sleeve 1182 is inserted into the upper seat shaft 223, so that the shaft coupling of the opening and closing device 100a and the contact mechanism 200a is realized. When the switching-on/off lower button 118 of the switching-on/off device 100a is operated to rotate, the switching-on/off lower button 118 drives the moving contact component 20 to synchronously act, so that the corresponding moving contact is combined with or separated from the static contact, and finally switching-on and switching-off operations are realized.

Aiming at the problem of low opening speed of the existing isolating switch product, the invention provides a scheme for automatically opening a brake by electromagnetic automatic tripping.

Meanwhile, the invention also aims at the problem of poor arc extinguishing effect of the existing isolating switch product and adopts various measures to carry out comprehensive arc extinguishing.

The following is an improvement to the structure of the mechanism stage 100 and the contact stage 200, which will be described in detail below.

2 mechanism pole

Referring to fig. 2, the mechanism stage 100 is provided with a switching device 100a to drive the contact mechanism 200a in the movable contact pole 200 to connect, wherein the switching lower button 118 is connected to the upper seat shaft 223 of the movable contact upper seat 22 in the movable contact assembly 20, so as to drive the contact to be combined with or separated from the fixed contact to realize switching on and off.

Aiming at the defects that the switching-off speed of a common motor-driven switch is not fast enough, the switching-off action cannot be switched quickly, and higher operation frequency cannot be allowed, the invention improves the switching-off and switching-on device 100a of the mechanism level 100, particularly designs an automatic tripping mechanism for quick switching-off, and realizes the requirement of a millisecond-level open circuit after receiving a switching-off signal. The details will be described below.

2.1 switching-on and switching-off device

The switching-on and switching-off device 100a can realize the purpose of remotely disconnecting the inverter system loop without manual operation when the circuit system of the inverter meets special working conditions such as overload, short circuit and the like. The automatic disconnection mechanism can not be influenced by the automatic disconnection mechanism when tests of relevant electrical service life, mechanical service life and the like are carried out. Meanwhile, the invention can also carry out closing action in an automatic state. The structure, operation principle and operation process of the present invention will be described with reference to the accompanying drawings.

Referring to fig. 3-12 and also to fig. 1-2, the opening/closing device 100a and the automatic tripping mechanism 100b thereof include a housing 11, a main shaft 12, an energy storage buckle 13, an energy storage spring 14, a latch shaft 15, an energy storage latch hook 16, a latch hook spring 17, a trigger shaft 18, a trigger spring 19, a trigger buckle 110, an electromagnet 111, a micro switch 112, a control circuit board 113, a lower buckle supporting leg 114, a supporting leg spring 115, a lower buckle clamping hook 116, a clamping hook spring 117, an opening/closing lower buckle 118, an opening/closing spring 119, an opening/closing upper buckle 120, and the like, and the specific structure is as follows.

As shown in fig. 3-5, the main shaft 12 is supported on the housing 11, the energy storage spring 14, the energy storage buckle 13, the upper buckle 120, the lower buckle 119 and the lower buckle 118 are coaxially installed on the main shaft 12 in sequence, wherein the upper buckle 120 is connected to the main shaft 12 in a fixed position, the lower buckle 118 and the energy storage buckle 13 can rotate around the main shaft 12 within a certain angle, the energy storage spring 14 is installed on the energy storage buckle 13, the switch spring 119 is installed between the upper buckle 120 and the lower buckle 118, the lower buckle 118 is connected to the movable contact base assembly 201 in the isolating switch movable contact pole 200 to drive the contacts to be combined with or separated from the fixed contacts, the upper buckle 120 can push the lower buckle 118 to rotate forward through the switch spring 119 to close the switch under the driving of the main shaft 12, and enables the energy storage spring 14 and the switch spring 119 to store energy when the switch is closed, the energy storage buckle 13 can push the lower buckle 118 to rotate backward under the action of the energy storage spring 14 when released to open the switch, the speed of the brake separating mode is higher.

In the invention, the switching lower button 118 is used for driving the contact to be combined with or separated from the static contact so as to perform switching operation. As shown in fig. 2 and 10, a lower buckle shaft sleeve 1182 is disposed at the bottom of the opening and closing lower buckle 118, wherein the lower buckle shaft sleeve 1182 is inserted into the upper seat shaft 223, and a positioning protrusion/groove is disposed between the lower buckle shaft sleeve 1182 and the upper seat shaft 223 to ensure that the two do not rotate relatively.

As shown in fig. 3 to 5, the energy storage buckle 13, the upper split buckle 120 and the lower split buckle 118 are mounted on the main shaft 12 and are not in contact with each other. Referring to fig. 6 to 10, the mounting structure of the energy storage buckle 13, the upper buckle 120 and the lower buckle 118 is: the opening and closing lower buckle 118 is provided with a lower buckle tail block 1181 which is adjacent to the opening and closing lower buckle shaft hole 1185; the lower buckle tail block 118 is simultaneously installed in a tail block hole 1201 of the split upper buckle 120 and a tail block groove 131 of the energy storage buckle 13, wherein the tail block hole 1201 is communicated with the split upper buckle shaft hole 1204, the tail block groove 131 is communicated with the energy storage buckle shaft hole 135, one side wall of the tail block groove 131 can only touch the lower buckle tail block 1181 in the release process of the energy storage buckle 13, and the other side wall of the tail block groove 131 and two side walls of the tail block hole 1201 do not touch the lower buckle tail block 1181, so that accurate opening and closing time sequences are ensured.

Here, split lower clasp 118 is associated with energy storage clasp 13 by lower clasp tail block 1181 passing through tail block aperture 1201 of split upper clasp 120. As an alternative, the energy storage buckle 13 may be associated with the connecting element from the outside of the separable upper buckle 120, which is not described in detail.

Referring to fig. 3 to 7, the energy storage spring 14 of the present invention is installed in the following manner: the top of the energy storage buckle 13 is provided with an energy storage spring bearing platform 132, the periphery of the top of the energy storage buckle is provided with an energy storage spring pushing block 133, the periphery of the energy storage buckle 13 is provided with an energy storage spring support 121 connected to the shell 11, the energy storage spring 14 is sleeved on the energy storage spring bearing platform 133 and supported on the top of the energy storage buckle 13, two legs of the energy storage spring 14 are respectively located on two sides of the energy storage spring pushing block 133 and the energy storage spring support 121, when the energy storage buckle 13 rotates, one leg of the energy storage spring 14 exerts force on the energy storage spring support 121, and the other leg exerts force on the energy storage spring pushing block 133.

Referring to fig. 3 to 5 and 8 to 10, the opening/closing spring 119 according to the present invention is installed in the following manner: the periphery of the lower opening and closing button 118 is provided with an opening and closing spring stop block 1184, the periphery of the upper opening and closing button 120 is provided with an opening and closing spring push block 1203, the opening and closing spring 119 is accommodated in a cavity enclosed by the upper opening and closing button 120 and the lower opening and closing button 118, and two feet of the opening and closing spring 119 are respectively positioned on two sides of the opening and closing spring stop block 1184 and the opening and closing spring push block 1203, so that the two feet of the opening and closing spring 119 can be correspondingly acted on the opening and closing spring stop block 1184 and the opening and closing spring push block 1203 during opening and closing.

Referring to fig. 3-5 and 11, the engaging and disengaging lower button 118 is provided with a lower button prop 114 to press the engaging and disengaging lower button 118 to prevent its play after the opening or closing is completed, wherein: the first end of the lower buckle arm 114 is rotatably mounted on the housing 11 of the isolating switch, the inner side of the second end of the lower buckle arm 114 can press against the sidewall of the lower buckle 118, and an arm spring (not shown) is mounted between the outer side of the second end of the lower buckle arm 114 and the housing 11, and is positioned by the spring positioning column 1142, so that the lower buckle arm 114 presses against the sidewall of the lower buckle 118. Here, the lower clasp support 114 is provided with a push bar 1141 at the top, which is pushed outward by the push arm 1202 of the upper clasp 120 to be disengaged from the lower clasp 118, and then, the opening and closing operation can be performed.

Referring to fig. 3-5, and 12, the opening and closing lower snap 118 is configured with a lower snap hook 116 to lock the opening and closing lower snap 118 after completion of closing and to unlock the opening and closing lower snap 118 at the start of opening, wherein: the first end of the lower hook 116 is rotatably installed in the isolation switch housing 11 through a lower hook shaft (not shown, and can be shared with the latch shaft 15), the inner side of the second end of the lower hook 116 is provided with a hook portion 1161 to match with a hook connecting portion 1183 of the opening and closing lower hook side wall, the hook spring 117 (which can be connected with the hook spring 17) is sleeved on the lower hook shaft, and two legs of the hook spring 121 exert force on the outer side of the lower hook 116 and the isolation switch housing 11. Here, the lower hook 116 is divided into three stages, the hook portion 1161 is disposed on the first stage 1162 and the second stage 1163, the inner side surface of the second stage 1163 can contact with the engaging and disengaging upper hook 120, and the inner side surface of the third stage 1164 abuts against the lower back surface of the energy storage hook 16, so that the lower hook 116 is associated with the energy storage hook 16, and the lower hook 116 can be pushed out by the engaging and disengaging upper push arm 1202 to be disengaged from the engaging and disengaging lower hook 118.

The opening and closing device is provided with a microswitch 112 and a control circuit board 113 for automatic control, so as to realize automatic opening operation. Therefore, the automatic tripping mechanism 100b driven by the electromagnet 11 is configured, the energy storage latch hook 16 is driven to be separated from the energy storage buckle 13, so that the energy storage buckle 13 is unlocked, and the energy storage buckle 13 drives the opening and closing lower buckle 118 to rotate reversely to perform tripping. The automatic trip mechanism is further described below.

2.2 automatic tripping device

The isolating switch is provided with the automatic tripping mechanism 100b, automatic brake opening is realized by automatically releasing the energy storage buckle 13, the energy storage buckle 13 can compress the energy storage spring 14 for energy storage and push the isolating switch on-off lower buckle 118 to rotate reversely when the energy storage spring 14 releases energy, so that the on-off lower buckle 118 drives the moving contact of the isolating switch to be separated from the static contact, the on-off lower buckle 118 is directly driven by the energy storage buckle 13 for brake opening, and the brake opening speed is higher.

As shown in fig. 3-5, the energy-storing buckle 13 is realized by an automatic tripping mechanism 100 b. This automatic tripping device 100b comprises drive assembly, trigger assembly and latch hook subassembly that set gradually, and wherein the latch hook subassembly can be detained 13 with the energy storage and combine or be connected with separating, and trigger assembly one side is connected the latch hook subassembly, and trigger assembly opposite side connects drive assembly, and drive assembly orders about trigger assembly according to the separating brake instruction and removes the restraint to the latch hook subassembly for the latch hook subassembly is detained 13 with the energy storage and is broken away from and realize separating brake.

As shown in fig. 3-5, the latch hook assembly specifically includes an energy storage latch hook 16, a latch hook shaft 15 and a latch hook spring 17, wherein the latch hook shaft 16 is fixed to the isolating switch housing 11, a first end of the energy storage latch hook 16 is rotatably installed on the latch hook shaft 15, a second end of the energy storage latch hook 16 is connected to the trigger assembly, a latch hook portion 161 matched with the energy storage buckle latch block 134 is disposed on an inner side of the energy storage latch hook 16, the latch hook spring 17 is sleeved on the latch hook shaft 15, and two legs of the latch hook spring 17 respectively exert force on an outer side of the energy storage latch hook 16 and the isolating switch housing 11. In particular, the latch hook assembly is provided with a microswitch 112, the microswitch 112 being located near the energy storage buckle 13, the feeler of which can contact the projection 136 of the energy storage buckle 13 in order to detect and output a position signal of the energy storage buckle 13. Of course, the micro switch 112 may be disposed at other positions to detect the related components, such as the position of the trigger latch 110 or the energy storage latch hook 16, and so on, which will not be described in detail.

As shown in fig. 3-5, the trigger assembly specifically includes a trigger buckle 110, a trigger shaft 18 and a trigger spring 19, the trigger shaft 18 is fixed to the housing 11, wherein the trigger buckle 110 is V-shaped, the middle portion of the trigger buckle 110 is rotatably installed on the trigger shaft 18, a first wing of the trigger buckle 110 is provided with a trigger buckle clamping block 1101 to be accommodated in the latch hook clamping slot 162 of the second end of the energy storage latch hook, a second wing of the trigger buckle 110 is connected to the driving assembly, the trigger spring 19 is sleeved on the trigger shaft 18, and two legs of the trigger spring 19 respectively exert force on the trigger buckle 110 and the housing 11.

As shown in fig. 3-5, the driving assembly specifically includes an electromagnet 111 mounted on the electromagnet support, and a movable iron core of the electromagnet 111 may abut against the second wing trigger surface 1102 of the trigger buckle 110, so that the movable iron core drives the trigger buckle 110 to move, thereby releasing the constraint on the latch hook assembly, and disengaging the latch hook assembly from the energy storage buckle 13 to achieve opening.

The operation process and the operation characteristics of the opening and closing device 100a and the automatic trip mechanism 100b thereof according to the present invention are as follows.

(1) The closing and energy storage positions can be stably self-locked. Fig. 3-5 show the position of the disconnector in the energy storage state. The energy storage buckle 13 tends to move anticlockwise under the action torque of the energy storage spring 14, but the energy storage buckle is clamped on the energy storage lock hook 16, and the energy storage lock hook 16 has the function of resisting the movement tendency of the energy storage buckle 13; the energy storage shackle 16 has a tendency to be pushed away by the energy storage buckle 13, since the torque of the shackle spring 17 is not sufficient to oppose the torque of the energy storage spring 14; the trigger buckle 110 is arranged behind the energy storage locking hook 16 and presses on the energy storage locking hook 16 to block the energy storage locking hook 16 from moving; therefore, the energy storage buckle 13, the energy storage latch hook 16 and the trigger buckle 110 form a closed mechanical triangle, so that the energy storage buckle 13, the energy storage latch hook 16 and the trigger buckle 110 are stabilized at the position.

Fig. 3-5 show the position of the engaging and disengaging lower hook 118 when the energy storage hook 13 is in the energy storage position. When the knob 101 is rotated manually to drive the main shaft 12 to complete energy storage of the energy storage buckle 13, the main shaft 12 drives the upper buckle 120, the lower buckle 118 and the energy storage buckle 13 to move clockwise. At the beginning, the engaging and disengaging lower hook 118 is pressed against the lower hook support 114 and is not rotated, so that the engaging and disengaging spring 119 between the engaging and disengaging lower hook 118 and the engaging and disengaging upper hook 120 is stored with energy while the engaging and disengaging upper hook 120 is rotated. When the upper buckle 120 rotates to about 85 degrees, the upper buckle pushing arm 1202 below the upper buckle 120 pushes the lower buckle supporting leg 114 open, so that the lower buckle supporting leg 114 is separated from the lower buckle 118, the energy is released by the opening and closing spring 119, the lower buckle 118 is driven to rotate along with the upper buckle 120 until the limiting groove 1186 of the lower buckle 118 is limited by the fixed point on the housing base 11b, and finally the upper buckle and the lower buckle reach 90 degrees. And the energy storage buckle 13 rotates for a certain angle continuously, and when the energy storage buckle is pushed to rotate through the position of 100 degrees, the energy storage buckle is clamped by the energy storage locking hook 16 and is stabilized at the position of 100 degrees.

(2) The energy storage buckle 13 can directly drive the upper buckle and the lower buckle to be separated. When the switch is tripped, the movable iron core of the electromagnet 111 is triggered and drives the pin rod to impact the trigger buckle 110, and the trigger buckle 110 rotates clockwise under the impact of the electromagnet 111, so that the constraint on the energy storage latch hook 16 is cancelled. The energy storage locking hook 16 rotates clockwise under the pressure of the energy storage buckle 13. Thereby, the energy storage buckle 13 moves counterclockwise without being restrained by the energy storage locking hook 16. The energy storage buckle 13 rotating counterclockwise can drive the upper buckle 120 to move counterclockwise through the spindle 12. Meanwhile, the energy storage buckle 13 rotating counterclockwise can also directly push the opening and closing lower buckle 118 to move counterclockwise. The tripping mode cancels the process that the common isolating switch firstly stores energy in the on-off lower button 118 and then opens the brake, so that the on-off lower button 118 can rapidly leave the on-off position, and the brake opening speed is increased by 10 times.

(3) With an energy storage indication. As shown in fig. 3-5, in the energy storage position where the energy storage buckle 13 is clamped by the energy storage locking hook 16, the protrusion 136 of the energy storage buckle 13 compresses the antenna of the micro switch 112, and compresses the antenna to the position where the micro switch is closed, and at this time, the corresponding output signal is an energy storage indication.

(4) And collecting and outputting an energy storage release signal. When the isolating switch completes automatic opening, the energy of the energy storage spring 14 is released into energy for driving the automatic opening. The upper buckle 120, the lower buckle 118 and the energy storage buckle 13 all enter the opening position, at the moment, the energy storage locking hook 16 is pushed open by the corresponding part of the energy storage buckle 13, the protruding part 136 of the energy storage buckle 13 is not contacted with the antenna of the micro switch 112 any more, and therefore the micro switch 112 outputs signals to indicate energy storage release.

In the above embodiment of the invention, the switching-closing device is transversely arranged above the isolating switch, the driving component of the automatic tripping mechanism is an electromagnet with enough impact force, and the electromagnet rapidly impacts the latch hook part of the switch when receiving a signal so as to break a loop. The difference between the method and the method that the motor mechanism is directly used for driving the main shaft to open the brake is as follows: the scheme of automatic brake opening after spring energy storage is adopted, the electromagnet is used for pushing the trigger buckle, the trigger spring with pre-stored energy drives the energy storage latch hook to act, and the energy storage latch hook is separated from the energy storage buckle. The automatic tripping mechanism can make quick breaking action, so that the whole breaking time can be finished within 20 ms.

Compared with the existing motor-driven automatic switch adopting the forward and reverse rotation of the motor to simulate manual brake opening, the invention has the advantages of high brake opening speed, clear remote control logic, higher operation frequency allowance and the like: on one hand, the driving devices of the motor switch for the switching-off and switching-on operations are both motors, the switching-off time of the motor switch reaches 0.5 second, and the motor switch does not meet the requirement of quick breaking; in the invention, the energy storage buckle directly drives the lower buckle to open the brake without passing through the upper buckle, and the brake opening speed is higher than that of the energy storage buckle after general energy storage; and the opening time driven by the electromagnet meets the rapid breaking requirement of millisecond level. On the other hand, the brake is released by the electromagnet, and the working conditions of immediate brake opening and the like can be rapidly completed after the brake is closed.

3. Contact pole

Referring to fig. 13, the contact mechanism 200a of the contact pole 200 includes a plurality of layers of movable contact assemblies 20 and stationary contacts 26, etc., wherein each layer has the same structure. During installation, each layer of movable contact assembly 20 is rotatably installed on the contact pole base body 21, the movable contact assemblies 20 of adjacent layers are coaxially installed, and each layer of static contact 26 is fixed on the shell of the contact pole base body 21.

Generally, the contact pole seat bodies 21 of the contact mechanisms of all layers are clamped, the adjacent layers of movable contact assemblies 20 are coupled by plugging, and the topmost layer of movable contact assembly 20 is coupled with the switching lower buckle 118 in the mechanism pole 100 by shaft. Specifically, the moving contact upper seat 22 in the top moving contact assembly 20 is provided with an upper seat shaft 223 for being inserted into the lower buckle shaft sleeve of the combining lower buckle 118 in the switching device 100a of the mechanism stage 100, thereby realizing the connection of the contact mechanism 200a and the switching device 100 a.

The present invention improves the contact pole 200 in the following respects.

On one hand, the frequent switching-on and switching-off processes have higher requirements on the installation accuracy of the moving contact and the durability of the moving contact piece, and the optimal design is needed, so the invention adopts the following measures:

(1) the movable contact upper and lower seats are inserted by buckles, and the corresponding slot openings adopt the arrangement of gradual and tight insertion, so that the relative rotation is reduced, and the action consistency of each layer of contact mechanism of the isolating switch is facilitated.

(2) The profile optimization design of the movable contact spring is characterized in that the main elastic deformation area of the movable contact spring is effectively limited outside the shoulder area enlarged by the movable contact spring, and two or four riveting points of the movable contact spring are located in the enlarged area, so that the elastic deformation of the movable contact spring cannot be influenced by the quality fluctuation of the riveting points, and the riveting points cannot be influenced by the extending contact arms and are firmer.

On the other hand, an arc may be caused during the opening process, which requires appropriate arc extinguishing measures. At present, the arc extinguishing of the contact mechanism of the isolating switch is enhanced by adding an arc extinguishing chamber and a permanent magnet, but the defects of inaccurate magnetic pole correspondence of the permanent magnet, unreasonable position arrangement of the arc extinguishing chamber and the like generally exist. Therefore, the problems that the arc is effectively extinguished and hot gas is exhausted in the disconnecting process of the isolating switch cannot be guaranteed, and a large amount of hot gas ions are attached to the inner wall of the isolating switch to burn a product and the like exist, so that the product performance is influenced. For this reason, the present invention mainly adopts the following improvement measures in the case of providing a rotation speed determination for the mechanism pole aiming at the requirement of enhancing the arc extinguishing capability of the contact mechanism in the application of the isolating switch.

(1) In the separation process of the moving contact and the static contact, a cavity is formed by the contact, the product shell, the edges of the upper seat plate and the lower seat plate of the moving contact, and hot air can be temporarily remained in the cavity when an electric arc occurs so as to keep a relatively high air pressure, which is beneficial to compressing an arc column and improving electric arc voltage; meanwhile, in the rotation of the movable contact piece, the air pushing block of the lower seat of the movable contact piece pushes hot air to the rotation direction, and simultaneously, cold air is pumped into the cavity; in addition, the gas pushing block is matched with the corresponding part of the shell, and the annular chamber is separated into two sections when the rotation is stopped, so that the ion gas caused by electric arc is prevented from flowing reversely in an uncontrolled manner, and the charged gas is promoted to be discharged smoothly.

(2) The closed position of each layer of movable contact is positioned at the central part of the isolating switch, and after the magnets are arranged, the positive and negative poles of the upper and lower magnets can be mutually influenced, so that the magnetic field is concentrated near the arc extinguishing position of the switch, and arc extinguishing is facilitated.

(3) The exhaust channel is opened and closed to increase the characteristics of the metal mesh, so that the exhaust hot gas is cooled, and charged particles in the exhausted hot air are effectively intercepted.

(4) The isolating switch shell is relatively provided with ribs, caps and the like, so that the creepage distance is increased.

The improvement point of the contact mechanism and the arc extinguishing device in the contact pole 200 of the present invention will be described in detail below.

3.1 contact mechanism

Referring to fig. 14, the contact mechanism 100 of the contact pole 2 is multi-layered, wherein each layer of contact mechanism includes a movable contact assembly 20 and a stationary contact assembly 26, all the movable contact assemblies 20 are coaxially installed with a contact pole base body 21, when being combined, the contact pole base bodies 21 of the contact mechanisms of each layer are clamped, and the movable contact base assemblies of the contact mechanisms of each layer are inserted.

Referring to fig. 15, the contact mechanism has multiple layers of moving contact assemblies 20 with the same structure, and multiple moving contact assemblies 20 are assembled together to form a moving contact "chain" that can act synchronously. Each movable contact assembly 20 includes a movable contact assembly 201 and a movable contact 202, and the movable contact 202 is fixed on the movable contact assembly 201 and rotates together with the movable contact assembly 201. In particular, the

movable contacts

202a, 202b of the contact arrangements 20 of the various layers are in the same direction in the closed condition and are arranged in longitudinal alignment. This arrangement offers the possibility of mounting the magnets according to the mutual influence of the magnetic poles.

Referring to fig. 16-22, the individual movable contact assemblies 20 are described in detail. Each movable contact assembly 20 comprises a movable contact upper seat 22, a movable contact lower seat 23, an upper movable contact piece 24 and a lower movable contact piece 25, wherein: the moving contact upper seat 22 and the moving contact lower seat 23 are combined into a moving contact seat assembly 201 which is rotatably supported on the contact pole seat body 21; the upper moving contact piece 24 and the lower moving contact piece 25 are combined into a moving contact piece assembly 202, which is installed on the moving contact base assembly 201 and rotates along with the moving contact base assembly 201, moving

contacts

202a and 202b are respectively formed at two ends of the moving contact piece assembly to be paired with two corresponding static contacts 26 for use, the two static contacts 26 are fixedly installed on the contact pole base body 21, and each static contact 26 has the same structure and is symmetrical to the center line of the contact pole 2 in position.

As shown in fig. 16-22 and also referring to fig. 23-26, the movable contact base assembly 201 is formed by combining the movable contact upper base 22 and the movable contact lower base 23, and the movable contact assembly 202 is formed by combining the movable contact 24 and the movable contact 25, and is clamped and positioned between the movable contact upper base 22 and the movable contact lower base 23, and can rotate along with the movable contact base assembly 201, so that the

movable contacts

202a and 202b are combined with or separated from the corresponding fixed contacts 26.

Here, the moving contact assembly 201 is formed by combining the moving contact upper seat 22 and the moving contact lower seat 23, and the moving contact upper seat 22 and the moving contact lower seat 23 are connected in a plug-in manner, specifically: in the same moving contact assembly 20, the upper base plate 221 of the moving contact upper base 22 is provided with an upper base plug-in card 224, the lower base plate 231 of the moving contact lower base 23 is provided with a lower base slot 234, the upper base plug-in card 224 is inserted into the lower base slot 234, specifically, the oblique angle is tightly inserted, and a positioning convex block or a groove is further arranged between the upper base plug-in card 224 and the lower base slot 234, so that the circumferential relative rotation of the upper base plug-in card and the lower base plug-in card is prevented. In each layer of movable contact assembly 20, the movable contact upper seat 22 is provided with an upper seat shaft 223, the movable contact lower seat 23 is provided with a lower seat shaft 233, the adjacent layer upper seat shaft 223 is inserted into the adjacent layer lower seat shaft 233 to be buckled, and a positioning bump or a groove is arranged between the lower seat shaft 223 and the lower seat shaft 233, so that the circumferential relative rotation of the upper seat shaft 223 and the lower seat shaft 233 is prevented. The installation mode has the advantages that the plug-in is tightly matched, no rotating gap exists between the plug-in and the rotating gap, and the action consistency of the upper layer contact and the lower layer contact is good.

On the one hand, for arc extinction, the movable contact assembly 20 has an air pushing block 232, and the basic concept is as follows: the air channel of the moving contact component is formed, air pressure is formed in the air channel in the rotating process of the moving contact component, and the air channel has a pushing effect on the gas containing charged ions, so that the charged gas is enabled to be smoothly discharged out of the isolating switch.

As shown in fig. 16-20, the movable contact upper seat 22 has an upper seat plate 221, and the movable contact lower seat 23 has a lower seat plate 231, each of which has a thin edge. Between the upper plate 221 and the lower plate 231, a gas-pushing block 232 is arranged, which is distributed substantially radially along the movable contact base assembly 201, i.e. extending from the center of the movable contact base assembly 201 to the edge of the movable contact base assembly 201, so that the gas-pushing block 232, the upper plate 221, the lower plate 231 and the gas duct wall 211 of the contact pole base body 21 form a chamber.

Specifically, the air pushing block 232 is fixedly disposed on the lower seat 231 of the lower moving contact seat 23, the upper seat 221 of the upper moving contact seat 22 is provided with a pushing block groove 222, and the air pushing block 222 is embedded in the pushing block groove 222 of the upper moving contact seat 22; of course, the positions of the push block 232 and the push block slot 222 may be reversed. When the

contacts

202a and 202b are in the closed position, a chamber is formed between the upper plate 221, the lower plate 222 and the air duct wall 211 of the contact pole body 21, and the air pushing block 232 pushes air to flow in the gas passage of the disconnector when the

movable contacts

202a and 202b rotate.

Thus, after the gas pushing block 232 is arranged, a gas channel is formed between the upper seat and the lower seat of the moving contact when the isolating switch is in the closed position. Under the cooperation of the gas pushing block 232, the gas in the gas channel flows to push the arc.

On the other hand, in order to improve the service life of the movable contact piece, the shape and the like of the movable contact piece in the movable contact group 20 are optimized in the present invention, as described below.

As shown in fig. 21 to 22, the movable contact set 201 is formed by riveting two

movable contacts

24 and 25, wherein a riveting portion of one movable contact 24 is provided with a riveting point to be riveted with the other movable contact 25, and a contact arm portion of one movable contact 24 and a contact arm portion of the other movable contact 25 form a movable contact jaw, thereby obtaining

movable contacts

202a and 202b to be combined with or separated from a fixed contact. Here, the width of the two sides of the moving contact jaw 2021 is greater than the width of the middle part, i.e. the outside is wide and the inside is narrow, so as to be conveniently combined with or separated from the corresponding static contact.

The present invention is directed to the modification of the upper movable contact piece 24 and the lower movable contact piece 25 in the movable contact piece assembly 202 to increase the strength thereof. Since the upper movable contact piece 24 and the lower movable contact piece 25 have the same structure, only one of the upper movable contact piece 24 will be described.

As shown in fig. 21 to 22, the movable contact 24 includes a rivet portion 241, two transition portions 242, and two contact arm portions 243: the riveting portion 241 is located in the middle, wherein a plurality of (for example, 2 to 4) riveting points 2411 can be arranged therein; the two contact arm portions 243 are respectively positioned at two sides of the riveting portion 241, a contact arm convex portion 2431 is arranged in the middle of the contact arm portion 243, the contact arm convex portion can be contacted with a static contact of a corresponding static contact, and two side edges 2432 of the contact arm portion 243 are arc-shaped, so that a moving contact clamping opening with a wide outer part and a narrow inner part is conveniently formed; the riveting portion 241 and the contact arm portion 243 are connected by a transition portion 242, wherein the transition portion 242 may be formed by stamping, deforming and bending the riveting portion 241 and the contact arm portion 243.

In the movable contact 24, the strength of the caulking portion 241 is greater than the strength of the contact arm portion 243 and the strength of the transition portion 242. Specifically, the width of the rivet portion 241 is increased to increase the strength, so that the width of the rivet portion 241 is greater than the width of the contact arm portion 243 and the width of the transition portion 242 forms an enlarged "shoulder" region; meanwhile, the width of the transition portion 242 is smaller than the width of the rivet portion 241 and the width of the contact arm portion 243. When the main elastic deformation area of the movable contact piece is effectively limited outside the enlarged shoulder area of the movable contact piece during riveting, two or four riveting points of the movable contact piece are positioned in the enlarged area, and when the stamping deformation area of the movable contact piece and the fixed contact are matched with each other to bear force, the longitudinal force borne by the riveting points can be shared by the reinforced area, so that the service life of the movable contact piece is ensured.

The embodiment is different from the direct stamping of the traditional contact piece, the riveting point position is reasonably arranged, the movable contact piece is subjected to strengthening treatment with two sides extending outwards in the area of the riveting point, the riveting point position is located in the strengthening area, therefore, the elastic deformation of the movable contact piece cannot be influenced by the fluctuation of the quality of the riveting point, and the riveting point cannot be influenced by the extending contact arm and is firmer.

3.2 arc extinguishing device

Aiming at the problem that the existing isolating switch in the market has poor arc extinguishing effect, the invention comprehensively adopts measures such as gas flow arc extinguishing, arc extinguishing grid arc extinguishing, magnetic blow arc extinguishing, metal mesh cooling arc extinguishing and cooling, and the like, thereby greatly enhancing the arc extinguishing performance of the isolating switch.

Referring to fig. 23-26 and fig. 16-22, the arc extinguishing device in the single-layer contact mechanism includes the above-mentioned contact pole base body 21, the moving contact assembly 20 (including the moving contact upper base 22, the moving contact lower base 23, the upper moving contact 24, and the lower moving contact 25), the two fixed contacts 26, the two arc extinguishing chambers 27, the two arc extinguishing grids 28, the two metal nets 29, and the two magnets 30, so as to form the structures of gas flow arc extinguishing, arc extinguishing grid arc extinguishing, magnetic blow arc extinguishing, and metal net cooling arc extinguishing and cooling, wherein the distribution positions of the gas flow arc extinguishing region Z1, the arc extinguishing grid arc extinguishing region Z2, the magnetic blow arc extinguishing region Z3, and the metal net cooling arc extinguishing and cooling region Z4 are shown in fig. 24 and 25, and their respective effects are shown in the following aspects.

First, the gas flows to extinguish the arc. The moving contact assembly 20 is provided with the gas pushing block 223, that is, the gas pushing block 232 is provided between the upper tray 221 and the lower tray 231 to form a chamber, and the structure thereof is described in detail above and will not be described herein again. The moving contact and the static contact form the cavity in the separation process, so that hot air can be temporarily left in the cavity when an electric arc occurs, a relatively high air pressure can be maintained, and the arc column can be compressed and the arc voltage can be improved. In the rotation of the movable contact piece, the air pushing block on the lower base of the movable contact piece is like an air box in the cavity, hot air can be pushed to the rotation direction, and cold air is sucked into the cavity, so that the temperature of the air is reduced, and the electric arc is eliminated. In addition, the gas pushing block can be matched with the gas channel wall of the contact electrode seat body, and the annular chamber is separated into two sections when the contact electrode seat body stops rotating, so that the uncontrolled reverse flow of the ion gas caused by electric arcs is avoided, and the charged gas is enabled to be smoothly discharged out of the chamber of the isolating switch.

Secondly, the gas channel of the isolating switch is provided with arc extinguishing chambers 27, wherein arc extinguishing grids 28 are respectively configured, and the arc extinguishing grids 28 can cut and cool the electric arc generated by the separation of the moving contact and the static contact. After receiving a mechanism opening and closing command, the moving contact component can rotate anticlockwise under the driving of the mechanism pole opening and closing device. At the moment, the air pushing block rotates anticlockwise to push the air. On the path of gas anticlockwise motion, the moving contact subassembly just separated from the static contact, this position is extruded by the gas row that the pushing away gas piece pushed out to the hot gas of its production, enters into the arc chute region, is cut into the polylith by the arc chute from this to realize the arc chute arc extinguishing.

And thirdly, an exhaust passage is arranged in the gas passage of the isolating switch, and a metal mesh 29 is arranged at the position of the exhaust passage so as to effectively intercept charged particles in the exhausted hot air and be beneficial to cooling the exhausted hot air at the same time of auxiliary arc extinction. The metal mesh is added on the exhaust channel outside the arc chute, and the advantages are that: firstly, the arc which is not completely eliminated by the arc chute can move in the gap of the metal mesh and is cooled by the metal mesh, so that the dissociation removing effect is enhanced; secondly, the electric arc is lengthened by the metal net, the diameter of the electric arc is reduced, the resistance is increased, and the electric arc is extinguished; and thirdly, when the gas doped with the charged ions is pushed out to the position of the flow guide channel, the metal mesh of the flow guide channel can further reduce the temperature of the guided gas, and part of the heated metal ions are adsorbed on the metal mesh, so that the harm of the discharged gas to the outside of the isolating switch is reduced.

Fourth, the present invention provides magnets 210, preferably permanent magnets or magnetic steel, in the contact pole housing 21, above and below the

closed positions

202a, 202b, respectively. When the moving contact is in the closed position, the corresponding moving contact is in close contact with the fixed contact. In the contact polar seat body 21, the positive pole of the magnet faces upwards, and the negative pole of the magnet faces downwards; thus, the lower layer magnet positive pole and the upper layer magnet negative pole form a dense magnetic field which has the function of promoting the arc extinction during the opening operation. When the switch is opened, the relative movement of the moving contact and the static contact can generate electric arcs, and the intensive magnetic field provided by the magnet generates an arc blowing effect. The contact pole is provided with a plurality of layers of movable contact groups, and the movable contact seats of the contact mechanisms of all layers are inserted because the contact pole seat bodies of all the layers are clamped. In particular, the movable contacts of the contact mechanisms of each layer are in the same direction in the closed state and are arranged in longitudinal alignment. This arrangement offers the possibility of mounting the magnets in such a way that their magnetic poles interact with one another.

The invention provides an improvement of an arc extinguishing device of a contact mechanism, when the mechanism level starts to rotate, the contact mechanism responds at the fastest speed and rotates along with the mechanism pole, so that a moving contact and a static contact of an isolating switch are separated, and gas pushing, magnetic blowing, an arc extinguishing grid and metal mesh combined arc extinguishing are formed by various means, thereby obviously improving the arc extinguishing effect of the isolating switch, specifically:

(1) a gas pushing block is arranged between the upper moving contact seat and the lower moving contact seat and can be combined with the upper seat and the lower seat to form a gas blast arc extinguishing device, and free gas is pushed out by gas pressure formed by rotation of the upper seat and the lower seat on one hand, and an electric arc is guided to an arc extinguishing grid part on the other hand;

(2) at the moment, because the electromagnets which are arranged up and down are arranged in the contact poles, the magnetic field formed between the electromagnets is strong, the magnetic induction lines are dense, and the magnetic loss is small, so that the electric arc is transferred to the direction of the arc-extinguishing grid and is elongated by the magnetic field under the action of the strong magnetic field;

(3) the arc-extinguishing grids at the corresponding positions can cut and cool the electric arc generated by the separation of the moving contact and the fixed contact, so that the temperature in the switch is reduced;

(4) when the gas is pushed out to the position of the flow guide channel, the metal grid of the flow guide channel can further reduce the temperature of the guided gas, and part of the heated metal ions are adsorbed on the grid, so that the harm of the discharged gas to the outside of the switch is reduced.

In addition, in the invention, the rib 212 is arranged on the outer wall of the contact pole base body 21 at the side edge of the static contact, and the tower cap 213 is arranged on the outer wall of the contact pole base body 21 above the static contact, so that the creepage distance is increased by arranging the rib 212 and the tower cap 213. Specifically, after the ribs 212 and the tower cap 213 are added on the outer wall of the isolating switch, electrons need to pass through the two ribs 212 and the tower cap 213 when climbing from one pole to the other pole, that is, the creepage distance between the positive pole and the negative pole of the same layer of the isolating switch is obviously increased, so that the creepage distance is greatly increased on the basis of not influencing the performances of switch disassembly and assembly and the like, and the improvement of the arc extinguishing performance of the switch is also favorable.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that the scope of the present invention is not limited to the embodiments described above, and that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a contact mechanism, including the contact polar seat body, move the contact seat, moving contact and static contact, static contact fixed mounting is in the contact polar seat body, the moving contact seat rotationally supports in the contact polar seat body, moving contact fixed mounting is in moving the contact seat, a serial communication port, the moving contact seat has upper panel and lower panel, set up the ejector pad between upper panel and the lower panel, the ejector pad extends to the edge of moving contact seat from the moving contact seat central authorities, so that the ejector pad when the moving contact is in the closed position with the upper panel, the air flue wall of lower panel and contact polar seat body forms the cavity, and the ejector pad promotes gas and flows at isolator gas channel when the moving contact is rotatory.

2. The contact mechanism as claimed in claim 1, wherein the movable contact base is formed by combining a movable contact upper base and a movable contact lower base, the movable contact upper base is provided with an upper base plate, the movable contact lower base is provided with a lower base plate, and the air pushing block is arranged on the upper base plate/the lower base plate and is embedded in the pushing block groove of the lower base plate/the upper base plate.

3. The contact mechanism as claimed in claim 2, wherein the movable contact upper anchor and the movable contact lower anchor are tightly connected at an oblique angle, and a positioning protrusion/recess is provided between the movable contact upper anchor and the movable contact lower anchor.

4. Contact arrangement according to claim 1, characterised in that the disconnector gas channel is provided with an arc extinguishing chamber, in which an arc extinguishing grid is arranged.

5. Contact arrangement according to claim 1, wherein the disconnector gas channel is provided with a lead-through, wherein the lead-through is provided with a metal mesh at the location of the lead-through.

6. The contact mechanism as claimed in claim 1, wherein the contact pole housing is provided with magnets, each pair of magnets being disposed above and below a closed position with the movable contact, respectively.

7. An isolating switch, characterized in that it comprises a plurality of layers of contact mechanisms as claimed in claims 1 to 6, wherein the contact pole seats of the contact mechanisms of each layer are clamped together, and the moving contact seats of the contact mechanisms of each layer are inserted together.

8. The isolator switch of claim 7, wherein the movable contacts of each of the contact means are in the same orientation in the closed position and are arranged in longitudinal alignment.

9. The isolating switch of claim 7, wherein the outer wall of the contact pole base body is provided with ribs at the side of the stationary contact to increase creepage distance.

10. The isolating switch of claim 7, wherein the outer wall of the contact pole base body is provided with a tower cap above the stationary contact to increase creepage distance.