CN219800690U - Position indicating device of three-station switch and switch cabinet - Google Patents

Abstract

The utility model provides a position indicating device of a three-position switch and a switch cabinet.

Description

Position indicating device of three-station switch and switch cabinet

Technical Field

The utility model relates to the field of switch cabinets, in particular to a position indicating device of a three-station switch and the switch cabinet.

Background

Three-position switches are an important component of a switchgear. The three-position switch integrates the functions of the isolating switch and the grounding switch and is completed by a knife, and the working position of the knife is unique at a certain moment, so that misoperation can be avoided. Therefore, the three stations refer to three working positions of the moving contact, namely a closing position, a separating position and a closing position of the grounding switch of the isolating switch. The knife is also called a moving contact, and three fixed contacts are respectively positioned at three working positions.

In order for a worker to clearly know the current position of the moving contact in the three-position switch, a set of position indicating mechanism is required.

Disclosure of Invention

In view of this, the present utility model provides a position indicating device of a three-position switch, the three-position switch includes a main shaft and a moving contact fixed on the main shaft, the rotation of the main shaft can drive the moving contact to rotate so as to make the moving contact switch between a closing position, a separating position of an isolating switch and a closing position of a grounding switch, the position indicating device includes:

a sliding plate provided on the frame, the sliding plate being capable of moving linearly in a first direction and a second direction on one sliding plane along with rotation of the spindle, the first direction being opposite to the second direction;

an abutting portion fixed to the sliding plate, the abutting portion being movable with the sliding plate between a first position corresponding to a closing position of the disconnecting switch, a second position corresponding to a opening position, and a third position corresponding to a closing position of the grounding switch;

the abutting part can trigger the on-off state of the first micro switch to change by abutting against the first micro switch when moving to the first position;

the second micro switch is fixed on the frame, the on-off state of the second micro switch is kept unchanged in the process of moving the abutting part between the first position and the second position, and the abutting part can trigger the on-off state of the second micro switch to change in the second position by being separated from the second micro switch in the process of moving the abutting part from the second position to the third position;

the third micro switch is fixed on the frame, the on-off state of the third micro switch is kept unchanged in the process that the abutting part moves between the second position and the third position, and the abutting part can trigger the on-off state of the third micro switch to change in the second position by being separated from the third micro switch in the process that the abutting part moves from the second position and the first position;

and the abutting part is fixed on the frame and moves to the third position, and the abutting part can trigger the on-off state of the fourth micro switch to change by abutting against the fourth micro switch.

According to the position indicating device of the three stations, by arranging the sliding plate, the abutting part fixed on the sliding plate, the first micro switch, the second micro switch, the third micro switch and the fourth micro switch and generating corresponding on-off signals by abutting the micro switches or separating from the micro switches, a worker can acquire the current position of the moving contact through the on-off signals.

According to the position indicating device as described above, optionally, the abutting portion includes:

a first fixed plate fixed to the sliding plate, the first fixed plate being capable of abutting against the second and third micro switches at the second position;

one end of the first support plate is fixed on a first side edge of the first fixing plate, the first support plate and the first fixing plate form a preset first angle, and the first support plate can be abutted against the first micro switch at the first position;

the first support plate is fixed on the first side edge of the first fixing plate, extends along the first direction and is opposite to the first side edge, and the abutting part can abut against the first micro switch under the condition that the abutting part moves between the first position and the second position;

the first support plate is fixed on the first side edge of the first fixing plate, extends along the first direction and can be abutted against the first micro switch when the abutting part moves between the first position and the second position;

and one end of the fourth support plate is fixed on the second side edge of the first fixing plate, the second side edge is opposite to the first side edge, the fourth support plate and the first fixing plate are at a preset second angle, and the fourth support plate can be abutted against the fourth micro switch at the third position.

The switch cabinet is simple in structure, low in cost and suitable for a switch cabinet with more free space in the first direction.

According to the position indicating device as described above, optionally, in a direction perpendicular to the sliding plane, the first support plate is located above the third support plate, and the second support plate is located above the fourth support plate.

According to the position indicating device as described above, optionally, the first fixing plate, the first support plate, the second support plate, the third support plate, and the fourth support plate are all perpendicular to the sliding plane. The arrangement mode can save space and ensure the convenience of movement.

According to the position indicating device as described above, optionally, the abutting portion includes:

a second fixing plate fixed to the sliding plate;

a first boss located on a first side of the first face of the second fixed plate, the first boss being capable of abutting the first microswitch in the first position;

a second boss located on a first side of a second face of the second fixed plate and extending along the first direction, the second boss being capable of abutting against a second movable switch between the first and second positions;

a third protruding portion located on a second side of the second surface of the second fixing plate and extending along the second direction, wherein the second protruding portion and the third protruding portion are distributed in a dislocation manner in a third direction, the third direction is perpendicular to the first direction, and the third protruding portion can abut against the third micro switch between the second position and the third position;

the fourth protruding portion is located on the second side of the first face of the second fixing plate, the fourth protruding portion and the first protruding portion are distributed in a staggered mode in the third direction, and the fourth protruding portion can be abutted to the fourth micro switch in the third position.

The switch cabinet is simple in structure and low in cost, and is suitable for a switch cabinet with more free space in the direction perpendicular to the first direction.

According to the position indicating device as described above, optionally, a predetermined space is provided between the first boss and the fourth boss, and ends of the second boss and the third boss are connected to each other.

According to the position indicating device as described above, optionally, the first boss, the second boss, the third boss, and the fourth boss each have an inclined section. Through this slope section, can be in the in-process of leaning on micro-gap switch and exert pressure gradually, and then avoid damaging micro-gap switch.

According to the position indicating device as described above, optionally, the second fixing plate is perpendicular to the sliding plane. Such a structure is simpler and more convenient to implement.

According to the position indicating device as described above, optionally, the slide plate has two elongated grooves extending in the first direction, through which bolts respectively pass and are fixed to the frame.

According to the position indicating device as described above, optionally, the first micro switch, the second micro switch, the third micro switch, and the fourth micro switch each have a roller for contacting the abutting portion.

The utility model also provides a switch cabinet, which comprises the position indicating device of the three-position switch.

Drawings

The above and other features and advantages of the present utility model will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

fig. 1 is a schematic structural view of a sliding plate and an abutting portion according to an embodiment of the utility model.

Fig. 2 is a schematic perspective view of the abutment portion in fig. 1 in a third position.

Fig. 3A is a schematic structural view of the abutting portion in fig. 1 in a first position.

Fig. 3B is a schematic structural view of the abutting portion in fig. 1 in a second position.

Fig. 3C is a schematic structural view of the third position of the abutment in fig. 1.

Fig. 4 is a schematic structural view of a sliding plate and an abutting portion according to another embodiment of the present utility model.

Fig. 5 is an angular schematic view of the abutting portion in fig. 4 in the second position.

Fig. 6A is a schematic structural view of the abutting portion in fig. 4 in a first position.

Fig. 6B is a schematic structural view of the abutting portion in fig. 4 in a second position.

Fig. 6C is a schematic view of the third position of the abutting portion in fig. 4

Wherein, the reference numerals are as follows:

1-sliding plate

11-elongated slot

20-first fixing plate

21-first support plate

22-second support plate

23-third support plate

24-fourth support plate

25-second fixing plate

26-first raised portion

27-second boss

28-third lobe

29-fourth lobe

211-inclined section

31-first micro-switch

32-second micro-switch

33-third micro-switch

34-fourth micro-switch

4-frame

Detailed Description

The present utility model will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Nouns and pronouns for humans in this patent application are not limited to a particular gender.

The three-position switch (not shown in the figure) comprises a moving contact, three fixed contacts and a main shaft, wherein the moving contact is fixed on the main shaft, the moving contact can be driven to be respectively contacted with the three fixed contacts by the rotation of the main shaft, and the positions of the three fixed contacts respectively correspond to the closing position, the opening position and the closing position of the isolating switch. For a Gas Insulated Switchgear (GIS), a three-position switch is positioned in the gas tank, and an operating mechanism outside the gas tank can drive a main shaft to rotate. Examples of the operating mechanism include a motor, a gear, and the like, and a structure in the prior art can be specifically referred to.

The position indicating device of the three-position switch comprises a micro switch. The micro-switch is also called an auxiliary switch and a sensitive switch, and is a switch using very tiny force, in particular, the micro-switch is a switch in which external mechanical force acts on a motion reed through a transmission element, so that a fixed contact at the tail end of the micro-switch is quickly connected with or disconnected from the motion contact. The micro switch can send signals to the control console, so that the control console can acquire the current position of the moving contact of the three-station switch according to the micro switch, and subsequent networking control can be executed.

In the utility model, the position indicating device of the three-position switch comprises a sliding plate, an abutting part, a first micro switch, a second micro switch, a third micro switch and a fourth micro switch.

The sliding plate is arranged on the frame, and can linearly move along a first direction and a second direction on a sliding plane along with the rotation of the main shaft, and the first direction is opposite to the second direction. The frame here may be an existing frame in a switchgear cabinet. As an exemplary illustration, there may be one or more other structures between the spindle and the sliding plate to convert the rotational movement of the spindle into linear movement of the sliding plate, for example, a screw drive may be used, and any manner in the prior art may be used, which will not be described herein.

The abutting part is fixed on the sliding plate and can move along with the sliding plate between a first position, a second position and a third position, wherein the first position corresponds to the closing position of the isolating switch, namely the position of the abutting part when the isolating switch is closed in place, the second position corresponds to the opening position, namely the position of the abutting part when the moving contact is opened in place, and the third position corresponds to the closing position of the grounding switch, namely the position of the abutting part when the grounding switch is closed in place. The linear movement of the sliding plate can drive the linear movement of the abutting portion, for example, the abutting portion also moves in the first direction and the second direction. The first position corresponds to a closing position of the isolating switch, and the abutting part is positioned at the first position under the condition that the moving contact moves to the closing position of the isolating switch; the second position corresponds to the opening position, and can be represented, and the abutting part is positioned at the second position under the condition that the moving contact moves to the opening position; the third position may be indicated as a closing position of the ground switch, and the abutting portion is located at the third position when the moving contact moves to the closing position of the ground switch.

The first micro-switch, the second micro-switch, the third micro-switch and the fourth micro-switch are respectively fixed on the frame. The on-off state mentioned below indicates whether the micro switch is in an on state or an off state. As an exemplary illustration, the micro-switch is turned on when it is abutted and turned off when it is released.

When the abutting part moves to or leaves the first position, the abutting part can trigger the on-off state of the first micro switch to change through abutting or separating from the first micro switch. For example, the rotation of the main shaft drives the moving contact to move from the opening position to the closing position of the isolating switch, the abutting part moves from a position which is not contacted with the first micro switch to a first position, the abutting part abuts against the first micro switch to trigger the on-off state of the first micro switch to change, and the first micro switch is conducted, so that the on-off state of the first micro switch changes, and a signal indicating the on-off state can be sent. Or the rotation of the main shaft drives the movable contact to move from the closing position to the opening position of the isolating switch, the abutting part is separated from the first position and then separated from the first micro switch, and the first micro switch is released and is changed from the on state to the off state. Under the condition that the abutting part moves at other positions, the on-off state of the first micro switch is not changed.

In the process that the abutting part moves between the first position and the second position, the on-off state of the second micro switch is kept unchanged, and under the condition that the abutting part moves from the second position to the third position, the abutting part can be separated from the second micro switch at the second position to trigger the on-off state of the second micro switch to change. For example, in the process that the rotation of the main shaft drives the moving contact to move from the closing position to the opening position of the isolating switch, the abutting part moves from the first position to the second position, and in the process, the abutting part always abuts against the second micro switch, namely, the on-off state of the second micro switch is not changed in the movement of the abutting part in the stage, namely, the second micro switch is kept in the on state; the rotation of the main shaft drives the movable contact to move from the opening position to the closing position of the isolating switch, the abutting part moves from the second position to the first position, and the abutting part always abuts against the second micro switch in the process; when the main shaft drives the movable contact to move from the opening position to the closing position of the grounding switch, the abutting part is separated from the second micro switch under the condition that the abutting part is separated from the second position, the second micro switch is released, and the on-off state of the second micro switch is changed, namely, the second micro switch is changed from the on state to the off state; in the process that the main shaft drives the moving contact to move from the closing position to the opening position of the grounding switch, the abutting part moves from the third position to the second position and abuts against the second micro switch at the second position, and the on-off state of the second micro switch changes, namely, the second micro switch changes from the off state to the on state.

The on-off state of the third micro switch is kept unchanged in the process that the abutting part moves between the second position and the third position, and the abutting part can be separated from the third micro switch at the second position to trigger the on-off state of the third micro switch to change under the condition that the abutting part moves from the second position to the first position. For example, the main shaft drives the moving contact to move from the opening position to the closing position of the grounding switch, and the abutting part moves from the second position to the third position, in the process, the abutting part can always abut against the third micro switch, the on-off state of the third micro switch is not changed, namely the third micro switch is kept in an on state; the main shaft drives the movable contact to move from a closing position to a separating position of the grounding switch, the abutting part moves from a third position to a second position, and the third micro switch also keeps a conducting state; the main shaft drives the moving contact to move from a switching-off position to a switching-on position of the isolating switch, correspondingly, the abutting part is separated from the second position and is separated from the third micro switch, and the third micro switch is converted into a switching-off state from a switching-on state; the main shaft drives the movable contact to move from the closing position to the opening position of the isolating switch, the abutting part moves from the first position to the second position, and at the second position, the abutting part abuts against the third micro switch, and the third micro switch is switched into the on state from the off state.

When the abutting part moves to or leaves the third position, the abutting part can abut against or leave the fourth micro switch to trigger the on-off state of the fourth micro switch to change. For example, the rotation of the main shaft drives the moving contact to move from a switching-off position to a switching-on position of the grounding switch, the abutting part moves from a position which is not contacted with the fourth micro switch to a third position, and at the third position, the abutting part abuts against the fourth micro switch, and the fourth micro switch is conducted, so that the on-off state of the fourth micro switch is changed, and a signal for indicating the on-off state can be sent out; the rotation of the main shaft drives the moving contact to move from the closing position to the opening position of the grounding switch, the abutting part is separated from the third position, the abutting part is separated from the fourth micro switch, and the fourth micro switch is released and is changed from the on state to the off state. Under the condition that the abutting part moves at other positions, the on-off state of the fourth micro switch is not changed.

If the microswitch is output at a high level in an on state and at a low level in an off state, the microswitch can be output at a level of a table in each position.

TABLE 1

Thus, by combining the level of each micro switch, the current position of the moving contact can be determined, and whether the moving contact moves from the closing position of the isolating switch to the opening position or from the closing position of the grounding switch to the opening position can also be determined. For example, when the first micro switch and the second micro switch are both at high level and the other two micro switches are both at low level, the moving contact reaches the closing position of the isolating switch. The staff can know the current position of the movable contact through the level state of each micro switch displayed on the control platform. In addition, the control platform can also control the electric operating mechanism of the three-station switch according to the level state of each micro switch and a preset rule, for example, the rotation of a motor in the electric operating mechanism is controlled, and detailed description is omitted. Of course, the micro switch may also send a signal representing the on-off state to the relay protection device, and the relay protection device performs subsequent operations according to the signal.

Alternatively, as shown in fig. 1 and 4, the slide plate has two elongated grooves 11 extending in the first direction, through which bolts respectively pass and are fixed to the frame. The two long grooves are adopted, so that the sliding plate is stable in the sliding process, and the performance of the position indicating device is further ensured.

Optionally, the first micro switch, the second micro switch, the third micro switch and the fourth micro switch are respectively provided with a roller, and the roller is used for contacting the abutting part. Through the micro-switch with the roller, the abutting part can be relatively smoothly abutted against or separated from each micro-switch in the moving process. It should be noted that "abutting" and "disengaging" according to the present utility model refer to a state capable of triggering a change in the on-off state of the micro switch, and if the abutting portion contacts the roller but does not trigger a change in the on-off state of the micro switch, the "abutting" and "disengaging" are not defined in the present utility model.

According to the position indicating device with three stations, the sliding plate, the abutting part fixed on the sliding plate, the first micro switch, the second micro switch, the third micro switch and the fourth micro switch are arranged, and corresponding on-off signals are generated by abutting the micro switches or separating from the micro switches, so that a worker can acquire the current position of the moving contact through the on-off signals.

Exemplary description one:

fig. 1 is a schematic structural view of an abutting portion fixed to a sliding plate, and is also a schematic structural view of an angle of the abutting portion at a second position, fig. 2 is a schematic structural view of the abutting portion abutting against a fourth micro switch, and fig. 3A to 3C are schematic structural views of the abutting portion at a first position, a second position and a third position respectively. The first microswitch 31, the second microswitch 32, the third microswitch 33, and the fourth microswitch 34 are all fixed to the frame 4.

In this example, the abutment comprises a first fixing plate 20, a first bracket plate 21, a second bracket plate 22, a third bracket plate 23 and a fourth bracket plate 24. The first fixing plate 20 is fixed on the sliding plate 1, and the first fixing plate 20 can abut against the second micro switch 32 and the third micro switch 33 at the second position. One end of the first support plate 21 is fixed on a first side edge of the first fixing plate 20, the first support plate 21 and the first fixing plate 20 form a preset first angle, and the first support plate 21 can abut against the first micro switch 31 at a first position; one end of the second support plate 22 is fixed to a second side edge of the first fixing plate 20 and extends along a second direction D2, the second side edge is opposite to the first side edge, and the second support plate 22 can abut against the second micro switch 32 when the abutting part moves between the second position and the third position; one end of the third support plate 23 is fixed to the first side edge of the first fixing plate 20 and extends along the first direction D1, and when the abutting portion moves between the first position and the second position, the third support plate 23 can abut against the third micro switch 33; one end of the fourth support plate 24 is fixed to the second side of the first fixing plate 20, the fourth support plate 24 and the first fixing plate 20 form a preset second angle, and the fourth support plate 24 can abut against the fourth micro switch 34 at the third position.

As shown in fig. 2 and 3, the first micro-switch 31 is located on the right side in the drawing, the second micro-switch 32 and the third micro-switch 33 are arranged to overlap, the fourth micro-switch 34 is located on the left side in the drawing, and the second micro-switch 32 and the third micro-switch 33 are located between the first micro-switch 31 and the fourth micro-switch 34. Alternatively, as shown in fig. 2 and 3A to 3C, in the direction perpendicular to the sliding plane, the first support plate 21 is located above the third support plate 23, and the second support plate 22 is located above the fourth support plate 24, and of course, the relative positions of the support plates may be set according to actual needs. As an exemplary illustration, the first fixing plate 20, the first support plate 21, the second support plate 22, the third support plate 23 and the fourth support plate 24 are all perpendicular to the sliding plane, specifically, the plate surface thereof is perpendicular to the sliding plane, so that the space can be saved and the convenience of movement can be ensured.

The on-off state of each micro switch is exemplified in the process that the abutting part moves between the positions.

Assuming that the initial position of the abutting portion is the first position as shown in fig. 3A, the first support plate 21 of the abutting portion abuts against the first micro switch 31, the third support plate 23 abuts against the third micro switch 33, and both the first micro switch 31 and the second micro switch 32 are in a conductive state. The third micro switch 33 and the fourth micro switch 34 are both in an off state. Next, the abutting portion is moved from the first position to the second position, in the process, the first holder plate 21 is instantaneously separated from the first position so that the first micro switch 31 is released, the first micro switch 31 becomes the off state, the second holder plate 22 is continuously abutted against the second micro switch 32, and the first fixing plate 20 is abutted against the third micro switch 33 and the second micro switch 32 at the second position, since the second micro switch 32 and the third micro switch 33 are overlapped, only the second micro switch 32 can be shown in fig. 3B, that is, when the abutting portion reaches the second position, the first fixing plate 20 is abutted against the second micro switch 32 and the third micro switch 33. Next, the abutting portion moves to the third position, at the moment when the abutting portion leaves the second position, the first fixing plate 20 is separated from the second micro switch 32, the second micro switch 32 is released, and due to the third support plate 23, the third micro switch 33 keeps being continuously abutted by the third support plate 23 after leaving the first fixing plate 20, that is, the third micro switch 33 is kept in an on state all the time, and the first micro switch 31 and the second micro switch 32 are kept in an off state all the time. Next, the fourth holder plate 24 abuts against the fourth micro switch 34 in the third position, so that the state of the fourth micro switch 34 is changed from off to on. The abutment portion is located at the third position, and the third holder plate 23 also abuts against the third micro switch 33, as shown in fig. 3C.

Accordingly, during the movement of the abutting portion from the third position to the second position, the fourth support plate 24 is separated from the fourth micro switch 34 at the moment when the abutting portion leaves the third position, the third support plate 23 still abuts against the third micro switch 33, at the moment when the abutting portion reaches the second position, the first fixing plate 20 abuts against the second micro switch 32 and the third micro switch 33, then the abutting portion moves in the first direction, at the moment when the abutting portion leaves the second position, the third micro switch 33 is released, and becomes in an off state, the second support plate 22 abuts against the second micro switch 32, and at the moment when the abutting portion reaches the first position, the first support plate 21 abuts against the first micro switch 31.

The position indicating device shown in fig. 1 to 3C is simple in structure and low in cost, and is suitable for a switch cabinet with more free space in the first direction D1.

Exemplary description two:

as shown in fig. 4 to 6C, the first micro switch 31, the second micro switch 32, the third micro switch 33, and the fourth micro switch 34 are fixed to the frame 4. The abutment portion includes a second fixing plate 25, a first boss 26, a third boss 28, a second boss 27, and a fourth boss 29. Wherein the first protruding portion 26 is located on a first side of the first surface of the second fixing plate 25, and the first protruding portion 26 can abut against the first micro switch 31 at the first position; the second protruding portion 27 is located on a first side of the second surface of the second fixing plate 25, and the second protruding portion 27 extends along the first direction D1, and the second protruding portion 27 is capable of abutting against the second micro switch 32 between the first position and the second position; the third protruding part 28 is located on the second side of the second surface of the second fixing plate 25, the third protruding part 28 extends along the second direction D2, the second protruding part 27 and the third protruding part 28 are distributed in a dislocation mode in the third direction D3, the third direction is perpendicular to the first direction D1, and the third protruding part 28 can abut against the third micro switch 33 between the second position and the third position; the fourth protruding portion 29 is located on the second side of the first surface of the second fixing plate 25, and the fourth protruding portion 29 and the first protruding portion 26 are distributed in a staggered manner in the third direction, and the fourth protruding portion 29 can abut against the fourth micro switch 4 in the third position. As can be seen from the figure, the third boss 28 has a length in the first direction that is greater than the first boss 26, and the fourth boss 29 has a length in the second direction that is greater than the second boss 27.

The first micro switch 31 and the fourth micro switch 34 are located at a side near the first face of the abutting portion, the second micro switch 32 and the third micro switch 33 are located at a side near the second face of the abutting portion, the first micro switch 31 and the fourth micro switch 34 may be arranged side by side as shown in fig. 6A to 6C, and the second micro switch 32 and the third micro switch 33 may be arranged side by side as shown in fig. 6A to 6C.

Optionally, the first boss 26 and the fourth boss 29 have a predetermined interval therebetween, and the ends of the second boss 27 and the third boss 28 are connected to each other. As can be seen from fig. 6A to 6C, the first boss 26 and the fourth boss 29 are spaced apart, and at this interval, neither the first microswitch 31 nor the fourth microswitch 34 is abutted, and therefore the first microswitch 31 and the fourth microswitch 34 remain in the off state. The ends of the second boss 27 and the third boss 28 are connected to each other, so that the second boss 27 and the third boss 28 have partial end overlaps in the third direction D3, and the abutting portion can abut against the second micro switch 32 and the third micro switch 33 at the same time in the second position.

Optionally, the first boss 26, the second boss 27, the third boss 28 and the fourth boss 29 each have an inclined section 211, by means of which inclined section 211 a pressure can be gradually applied during abutment against the microswitch, thereby avoiding damage to the microswitch.

Alternatively, the second fixing plate 25 is perpendicular to the sliding plane. Such a structure is simpler and more convenient to implement.

Assuming that the initial position of the abutment portion is the first position as shown in fig. 6A, at this time, the first protrusion 26 of the abutment portion abuts against the first micro switch 31, the second protrusion 27 abuts against the second micro switch 32, the second micro switch 32 and the first micro switch 31 are both in an on state, and the fourth micro switch 34 and the third micro switch 33 are both in an off state. Next, the abutting portion moves from the first position to the second position, the second protruding portion 27 always abuts against the second micro switch 32 in the process, the first protruding portion 26 is separated from the first micro switch 31 at the moment of leaving the first position, and the first micro switch 31 becomes an off state. When the abutting portion moves to the second position, the second boss 27 and the third boss 28 of the abutting portion abut against the second micro switch 32 and the third micro switch 33, respectively, and the third micro switch 33 is changed from the off state to the on state, and the first micro switch 31 remains in the off state. Then, the abutting portion moves from the second position to the third position, at the moment of moving away from the second position, the second protruding portion 27 is separated from the second micro switch 32, the second micro switch 32 is released, the second micro switch 32 becomes the off state, the third micro switch 33 is kept in the on state due to the action of the third protruding portion 28, the fourth protruding portion 29 gradually approaches the fourth micro switch 34 and abuts against the fourth micro switch 34 at the third position, and the fourth micro switch 34 becomes the on state.

As shown in fig. 6C to 6A, when the abutting portion moves from the third position to the second position, the fourth protruding portion 29 is separated from the fourth micro switch 34 at the moment when the abutting portion leaves the third position, the fourth micro switch 34 is released, the fourth micro switch 34 is turned from the on state to the off state, the third protruding portion 28 abuts against the third micro switch 33, when reaching the second position, the second protruding portion 27 abuts against the second micro switch 32, the second micro switch 32 is turned from the off state to the on state, then the abutting portion moves to the first position, when leaving the second position, the third protruding portion 28 is separated from the third micro switch 33, the third micro switch 33 is turned from the on state to the off state, and when the abutting portion reaches the first position, the first protruding portion 26 abuts against the first micro switch 31.

The position indicating device shown in fig. 4 to 6C is simple in structure and low in cost, and is suitable for a switch cabinet with more free space in the direction perpendicular to the first direction D1.

The utility model also comprises a switch cabinet which comprises the position indicating device of any three-position switch.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (11)

1. The position indication device of the three-position switch comprises a main shaft and a moving contact fixed on the main shaft, wherein the moving contact can be driven to rotate by the rotation of the main shaft so as to enable the moving contact to be switched between a closing position, a separating position and a closing position of a grounding switch of the isolating switch, and the position indication device is characterized by comprising:

a slide plate (1) provided on the frame (4), the slide plate (1) being capable of rectilinear movement in a first direction (D1) and a second direction (D2) on one slide plane with rotation of the spindle, the first direction (D1) being opposite to the second direction (D2);

an abutment fixed to the sliding plate (1), the abutment being movable with the sliding plate (1) between a first position corresponding to a closing position of the disconnector, a second position corresponding to a breaking position, and a third position corresponding to a closing position of the earthing switch;

a first micro switch (31) fixed on the frame (4), wherein the abutting part moves to the first position, and the abutting part can trigger the on-off state of the first micro switch (31) to change by abutting against the first micro switch (31);

a second micro switch (32) fixed on the frame (4), wherein the abutting part keeps unchanged the on-off state of the second micro switch (32) in the process of moving between the first position and the second position, and the abutting part can be changed in the second position by separating from the second micro switch (32) to trigger the on-off state of the second micro switch (32) when the abutting part moves from the second position to the third position;

a third micro switch (33) fixed on the frame (4), wherein the abutting part keeps unchanged the on-off state of the third micro switch (33) in the process of moving between the second position and the third position, and when the abutting part moves from the second position to the first position, the abutting part can change the on-off state of the third micro switch (33) by disengaging the third micro switch (33) in the second position;

and the fourth micro switch (34) is fixed on the frame (4), the abutting part moves to the third position, and the abutting part can trigger the on-off state of the fourth micro switch (34) to change by abutting against the fourth micro switch (34).

2. The position indication device of claim 1, wherein the abutment comprises:

a first fixed plate (20) fixed to the sliding plate (1), the first fixed plate (20) being capable of abutting against a second microswitch (32) and a third microswitch (33) in the second position;

the first support plate (21) is fixed on a first side edge of the first fixing plate (20), the first support plate (21) and the first fixing plate (20) form a preset first angle, and the first support plate (21) can be abutted against the first micro switch (31) at the first position;

a second support plate (22) having one end fixed to a second side of the first fixing plate (20) and extending along the second direction (D2), the second side being opposite to the first side, the abutment portion being capable of abutting against the second microswitch (32) when the abutment portion moves between the second position and the third position;

a third support plate (23) having one end fixed to a first side of the first fixing plate (20) and extending along the first direction (D1), the third support plate (23) being capable of abutting against the third micro switch (33) when the abutting portion moves between a first position and the second position;

and one end of the fourth support plate (24) is fixed on a second side edge of the first fixing plate (20), the second side edge is opposite to the first side edge, the fourth support plate (24) and the first fixing plate (20) form a preset second angle, and the fourth support plate (24) can be abutted against a fourth micro switch (34) at the third position.

3. The position indicating device according to claim 2, characterized in that the first bracket plate (21) is located above the third bracket plate (23) and the second bracket plate (22) is located above the fourth bracket plate (24) in a direction perpendicular to the sliding plane.

4. The position indicating device according to claim 2, characterized in that the first fixing plate (20), the first support plate (21), the second support plate (22), the third support plate (23) and the fourth support plate (24) are all perpendicular to the sliding plane.

5. The position indication device of claim 1, wherein the abutment comprises:

a second fixing plate (25) fixed to the slide plate (1);

a first boss (26) located on a first side of the first face of the second fixed plate (25), the first boss (26) being capable of abutting the first microswitch (31) in the first position;

a second boss (27) located on a first side of a second face of the second fixing plate (25) and the second boss (27) extending along the first direction (D1), the second boss (27) being capable of abutting against a second microswitch (32) between the first and second positions;

-a third protrusion (28) located on a second side of the second face of the second fixed plate (25) and the third protrusion (28) extending along the second direction (D2), the second protrusion (27) being offset from the third protrusion (28) in a third direction (D3), the third direction (D3) being perpendicular to the first direction (D1), the third protrusion (28) being capable of abutting against the third microswitch (33) between the second and third positions;

and a fourth protruding part (29) located on a second side of the first surface of the second fixing plate (25), wherein the fourth protruding part (29) and the first protruding part (26) are distributed in a dislocation manner in the third direction (D3), and the fourth protruding part (29) can abut against the fourth micro switch (34) at the third position.

6. The position indicating device according to claim 5, characterized in that the first boss (26) and the fourth boss (29) have a preset spacing therebetween, and the ends of the second boss (27) and the third boss (28) are connected to each other.

7. The position indicating device according to claim 5, characterized in that the first boss (26), the second boss (27), the third boss (28) and the fourth boss (29) each have an inclined section (211).

8. Position indicating device according to claim 5, characterized in that the second fixing plate (25) is perpendicular to the sliding plane.

9. Position indicating device according to any one of claims 1-8, characterized in that the sliding plate (1) has two elongated slots (11) extending in the first direction (D1), through which slots (11) bolts respectively pass and are fixed to the frame (4).

10. The position indicating device according to any one of claims 1-8, characterized in that the first microswitch (31), the second microswitch (32), the third microswitch (33) and the fourth microswitch (34) each have a roller for contacting the abutment.

11. A switchgear cabinet comprising a position indicating device of a three-position switch according to any of claims 1-10.