CN215680460U - Key lock device of three-position switch and switch cabinet - Google Patents

Abstract

The utility model provides a key lock device of a three-position switch and a switch cabinet. The device comprises: a link switchable between a closing position, a grounding position, and an opening position; the shielding component can be switched among a first position exposing the grounding switch operation hole, a second position shielding the two operation holes and a third position exposing the isolating switch operation hole; the lock box is provided with a baffle and a moving assembly, the moving assembly is linked with the shielding component, the baffle is provided with a lock cylinder, the lock cylinder can rotate to a fourth position where the key is allowed to be pulled out of the lock cylinder, under the condition that the connecting rod is located at the switching-on position, the lock cylinder can rotate to the fourth position, and the operation hole assembly is forbidden to move to the third position; under the condition that the connecting rod is in the opening position, the lock cylinder deviates from the fourth position, and the operation hole assembly can be switched among the first position, the second position and the third position.

Description

Key lock device of three-position switch and switch cabinet

Technical Field

The utility model relates to the field of switch equipment, in particular to a key lock device of a three-position switch and a switch cabinet.

Background

The three-position switch is an important part in the switch cabinet, integrates the functions of the isolating switch and the grounding switch and is completed by a knife. The three positions of the three-position switch are respectively a switch-on position, a switch-off position and a grounding position. The switching-on position refers to the switching-on of the isolating switch, the switching-off position refers to the switching-off of the isolating switch, and the grounding position refers to the switching-on of the grounding switch. Each switch is provided with a group of fixed contacts and moving contacts correspondingly, when the fixed contacts are contacted with the moving contacts, the switch is closed, and when the fixed contacts are separated from the moving contacts, the switch is opened. The panel of the switch cabinet is provided with two operation holes, one is an operation hole of the isolating switch, the other is an operation hole of the grounding switch, and a worker can extend the handle into the corresponding operation hole to operate. The two operation holes are respectively provided with a baffle plate, and one of the operation holes can be exposed or the two operation holes can be shielded by moving the baffle plate. The handle can drive the operating mechanism to move, the operating mechanism is connected with the free end of a connecting rod, and the other end of the connecting rod is connected with the moving contact of the isolating switch and the moving contact of the grounding switch.

Because the three-position switch integrates the functions of closing, opening and grounding, misoperation can occur in the operation process. In order to avoid such misoperation, a corresponding interlocking mechanism needs to be added, and corresponding operation can be performed only after the operation step is determined to be unlocked.

In the prior art, there have been many mechanisms for interlocking with a key lock device that can be interlocked with a shutter plate on an operation hole.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a key lock device of a three-position switch and a switch cabinet. Wherein, three station switch's key lock device includes: a link which can be switched between a closing position of a three-position switch, a grounding position of the three-position switch and an opening position of the three-position switch;

the shielding component is linked with the vertical scanning plate, the vertical scanning plate can move back and forth in a first direction, and the shielding component can be switched among a first position exposing the grounding switch operation hole, a second position shielding the two operation holes and a third position exposing the isolating switch operation hole; the three-position switch further comprises:

the lock box is provided with a baffle and a moving assembly, the moving assembly is linked with the shielding component, the baffle is provided with a lock cylinder, the lock cylinder can rotate to a fourth position where a key is allowed to be pulled out of the lock cylinder, and the lock cylinder penetrates through the moving assembly;

under the condition that the connecting rod is located at the switching-on position, the lock cylinder can rotate to a fourth position, and the operation hole assembly is prohibited to move to a third position;

under the condition that the connecting rod is in the opening position, the lock cylinder deviates from the fourth position, and the operation hole assembly can be switched among the first position, the second position and the third position.

According to the key lock device, under the condition that the three-position switch is switched off, the baffle plate corresponding to the operation hole can move freely, so that the three-position switch is switched on or grounded; under the condition of switching on the three-position switch, after the key is pulled out, the baffle corresponding to the operation hole cannot move to the position where the operation hole of the isolating switch is exposed.

According to the key lock device as above, optionally, the moving assembly comprises a sliding plate, a horizontal scanning plate and a ground scanning plate which are linked, the horizontal scanning plate, the sliding plate and the ground scanning plate can move back and forth in a second direction, and the first direction is perpendicular to the second direction.

According to the key lock device, optionally, the vertical scanning plate has a first long hole having an expanding section for allowing the lock cylinder to rotate, the horizontal scanning plate has a first waist hole including a first hole section and a second hole section which are communicated with each other, the second hole section has a larger diameter than the first hole section, the ground scanning plate has a second waist hole including a third hole section and a fourth hole section which are communicated with each other, the fourth hole section has a larger diameter than the third hole section, the lock cylinder is inserted through the first long hole, the first waist hole and the second waist hole, the lock cylinder is prohibited from moving in the first long hole when the lock cylinder is rotated to the fourth position, the lock cylinder can be rotated to the fourth position in the case where the lock cylinder is located in both the second hole section and the fourth hole section, the lock cylinder can be moved in the first hole section and the third hole section when the lock cylinder is rotated to the fifth position, the rotation angle between the fourth position and the fifth position is 90 degrees;

the lock cylinder is positioned in the second hole section and the fourth hole section under the condition that the connecting rod is positioned at the switching-on position and the moving assembly moves to the position abutting against the connecting rod;

with the link in the open position and the moving assembly moved to a position against the link, the lock cylinder is located in the first bore section.

According to the key lock device, optionally, a fixing part is further provided, the horizontal scanning plate is further provided with a second long hole, and the fixing part is positioned in the second long hole;

with the link in the grounded position, the grounded scan plate is moved to a position blocked by the fixed component and the lock cylinder is located in the third bore section.

According to the key lock device as above, optionally, the link has a projection which is capable of contacting the moving member with the projection in the on position.

According to the key lock device, optionally, the lock cylinder comprises a first group of cut surfaces and a second group of cut surfaces, the first group of cut surfaces are symmetrically arranged and are positioned in the first waist hole and the second waist hole, the second group of cut surfaces are symmetrically arranged and are perpendicular to the first group of cut surfaces, and the second group of cut surfaces are positioned in the first long hole.

According to the above key lock device, optionally, the moving assembly further comprises a first handle fixed to the sliding plate, and the horizontal scanning plate and the ground scanning plate are driven to move in the same direction by driving the sliding plate.

According to the key lock device as above, alternatively, the extending direction of the first long hole is perpendicular to the extending direction of the first waist hole, and the extending direction of the first long hole is perpendicular to the extending direction of the second waist hole.

According to the key lock device, optionally, the key lock device further comprises a fixing piece, the connecting rod comprises a rod body and a crank arm connected with the rod body, the crank arm is connected with the contact mechanism, the crank arm is sleeved on an operating shaft of the contact mechanism and is fixed on the contact mechanism through the fixing piece, one end of the fixing piece is fixed on one side, away from the contact mechanism, of the crank arm, and the other end of the fixing piece is fixed on the contact mechanism.

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

Drawings

The foregoing and other features and advantages of the utility model will become more apparent to those skilled in the art to which the utility model relates upon consideration of the following detailed description of a preferred embodiment of the utility model with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of a pull rod in a switching-on position according to the present invention.

Fig. 2 is a schematic structural view of the contact between the lock case and the pull rod in a closing state.

Fig. 3 is a schematic structural view of the shielding member in a closed state.

Fig. 4 is a schematic view of the pull rod in the brake-off position according to the present invention.

Fig. 5 is a schematic structural view of the contact between the lock case and the pull rod in the opening state.

Fig. 6 is a schematic position diagram of the lock cylinder in the opening state.

Fig. 7 is a schematic view of the tie rod in the ground position according to the present invention.

Fig. 8 is a schematic structural view of the lock case contacting the pull rod in the grounded state.

Fig. 9 is a schematic view of the position of the lock cylinder in the grounded state.

Fig. 10 is an exploded view of the lock case.

Fig. 11 is a schematic structural diagram of a grounded scanning plate.

Fig. 12 is a schematic structural view of a lock cylinder with two sets of cut surfaces.

Wherein the reference numbers are as follows:

10-connecting rod

101-projection

102-rod body

103-crank arm

23-Shield Member

24-vertical scanning plate

241-first long hole

2411-widening section

25-grip part

301-return spring

31-baffle plate

32-lock core

321-first cut plane

322-second group of cutting planes

34-sliding plate

341 extension part

35-horizontal scanning plate

351-first waist hole

3511-first hole segment

3512-second hole section

36-grounded scanning plate

361-second waist hole

3611 third bore segment

3612 fourth hole segment

362-bent section

37-first handle

38-stop element

39-fixing element

40-tailgate

80-Key

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.

In the utility model, under the condition that the three-position switch is required to be switched off, the baffle corresponding to the operation hole can freely move so as to switch on the three-position switch or ground the three-position switch; under the condition of switching on the three-position switch, after the key is pulled out, the baffle corresponding to the operation hole cannot move to the position where the operation hole of the isolating switch is exposed. Based on this demand, utility model people provide the key lock device of following three-position switch.

As shown in fig. 1 to 12, a key lock device of a three-position switch according to the present embodiment is shown. The key lock device includes a link 10, an operation hole assembly and a lock case.

Wherein the connecting rod 10 can be switched between a switching-on position of a three-position switch, a grounding position of a three-position switch and a switching-off position of a three-position switch. The transmission mechanism is driven by a handle (not shown in the figure) to move, and the transmission mechanism drives the connecting rod 10 to respectively switch between a closing position, a grounding position and an opening position. How to realize the switching-on, switching-off and grounding of the three-position switch by the specific operating mechanism through the connecting rod 10 belongs to the prior art, and is not described herein again. As seen in fig. 1, the connecting rod 10 may include a rod 102 and a crank arm 103, the crank arm 103 being connected to the rod 102, the crank arm 103 having a protrusion 101 thereon.

The operation hole assembly has an earthing switch operation hole, a disconnecting switch operation hole, a shielding member 23 and a vertical scanning plate 24, the shielding member 23 is linked with the vertical scanning plate 24, and the vertical scanning plate 24 can move back and forth in a first direction. As shown in fig. 10, the first direction may be an extending direction of the vertical scan plate 24. The shielding member 23 is capable of switching between a first position in which the earthing switch operation hole is exposed, a second position in which two operation holes are shielded as shown in fig. 3, and a third position in which the disconnecting switch operation hole is exposed, wherein the earthing switch operation hole corresponds to the earthing switch and the disconnecting switch operation hole corresponds to the disconnecting switch. The operation hole assembly may have a holding portion 25, the holding portion 25 is fixed to the shielding member 23 and linked with the vertical scanning plate 24, and the shielding member 23 is driven to rotate to expose the corresponding operation hole by moving the holding portion 25 back and forth in the first direction. For example, when the grip portion 25 is moved upward in the direction shown in fig. 3, the shielding member 23 located at the position corresponding to the disconnecting switch operation hole is rotated to cause the disconnecting switch operation hole to leak out, and when the grip portion 25 is moved downward, the shielding member 23 located at the position corresponding to the earthing switch operation hole is rotated to cause the earthing switch operation hole to leak out. The interlocking between the shielding member 23 and the holding portion 25 is prior art and will not be described in detail. That is, if the vertical scan plate 24 is restricted in position, the grip portion 25 cannot move in the corresponding direction, and thus the shutter corresponding to the corresponding operation hole cannot be opened.

The lock box is provided with a baffle plate 31 and a moving component, and the moving component is linked with the baffle plate 31. The barrier 31 has a key cylinder 32 thereon, and the key cylinder 32 is rotatable to a fourth position in which the key 80 is allowed to be removed from the key cylinder 32, as shown in fig. 2, with the key cylinder 32 in the fourth position. The lock cylinder 32 is disposed through the moving assembly. The key 80 can only be removed when the lock cylinder 32 is rotated to the fourth position. It should be noted that the fourth position may be within a certain range, that is, the key 80 can be pulled out when the rotation angle of the key cylinder 32 is within a certain range.

With the connecting rod 10 in the on position, the lock cylinder 32 can be rotated to the fourth position, and the operation hole assembly is prohibited from moving to the third position; in the case where the link 10 is in the open position, the key cylinder 32 is offset from the fourth position, for example, at a fifth position where the key cylinder 32 is rotated 90 degrees from the fourth position, and the operation hole assembly can be switched among the first position, the second position, and the third position. The movement of the operation hole assembly to the third position may be prohibited, the shutter member 23 in the operation hole assembly may not be movable, or the shutter member 23 may be movable only between the first position and the second position. As shown in fig. 8, the link 10 is in the open position, and the shutter member 23 can move up and down.

As an exemplary illustration, as shown in fig. 10, the moving assembly of the present embodiment includes a horizontal scanning plate 35, a sliding plate 34 and a grounding scanning plate 36 which are linked, and the horizontal scanning plate 35, the sliding plate 34 and the grounding scanning plate 36 can move back and forth in a second direction, and the first direction is perpendicular to the second direction. As can be seen from fig. 5, the vertical scanning plate 24 and the shielding member 23 are linked, the vertical scanning plate 24 moves back and forth in the first direction, i.e., along the direction in which it extends, and the shielding member 23 can be switched among the first position, the second position, and the third position. The horizontal scanning plate 35, the sliding plate 34, and the ground scanning plate 36 all move in the second direction. The key cylinder 32 passes through the slide plate 34, the vertical scan plate 24, the ground scan plate 36, and the horizontal scan plate 35 in this order, and the key cylinder 32 passes through the plates in this order in a third direction perpendicular to the first direction and the second direction. The moving member may further comprise a first handle 37, the first handle 37 is fixed to the sliding plate 34, and the sliding plate 34 is driven by moving the first handle 37, so as to drive the horizontal scanning plate 35 and the ground scanning plate 36 to move in the same direction. The specific linkage mode may be that return springs 301 are connected between the sliding plate 34, the horizontal scanning plate 35 and the ground scanning plate 36, and when the sliding plate 34 acts, the horizontal scanning plate 35 and the ground scanning plate 36 can be driven to move due to the return springs 301. The lock box also includes a tailgate 40, and the tailgate 40 may act as a fixed support for the moving assembly. Specifically, the slide plate 34 may eventually be stopped by touching the link 10, thereby achieving a limit of the moving distance of the slide plate 34. More specifically, the sliding plate 34 may have an extension portion 341, and the extension portion 341 may extend in a third direction perpendicular to the first direction and the second direction, and the sliding plate 34 may be in contact with the drawbar 10 through the extension portion 34. The slide plate may also be coupled to a return spring (not shown) which moves to its home position in the absence of an external force applied to the first handle 37.

As a more specific example, as shown in fig. 10, the vertical scan plate 24 has a first long hole 241 and the first long hole 241 has a widened section 2411 for the rotation of the key cylinder 32. The first long hole 241 extends in the first direction. As shown in fig. 11, the horizontal scanning plate 35 has a first waist hole 351, the first waist hole 351 includes a first hole section 3511 and a second hole section 3512 which are communicated with each other, and the hole diameter of the second hole section 3512 is larger than that of the first hole section 3511. As shown in fig. 11, the ground scan plate 36 has a second waist hole 361, the second waist hole 361 includes a third hole section 3611 and a fourth hole section 3612 which are communicated with each other, the hole diameter of the fourth hole section 3612 is larger than the hole diameter of the third hole section 3611, the key cylinder 32 is inserted into the first long hole 241, the first waist hole 351 and the second waist hole 361, the key cylinder 32 is prohibited from moving in the first long hole 241 when the key cylinder 32 is rotated to the fourth position, the key cylinder 32 can be rotated to the fourth position in the case where the key cylinder 32 is simultaneously located in the second hole section 3512 and the fourth hole section 3612, the key cylinder 32 can be moved in the first hole section 3511 and the third hole section 3611 when the key cylinder 32 is rotated to the fifth position, and the rotation angle between the fourth position and the fifth position is 90 degrees. In this way, with the link 10 in the closed position and the moving assembly moved to a position abutting against the link 10, the lock cylinder 32 is located in the second bore section 3512 and the fourth bore section 3612; with the link 10 in the open position and the moving assembly moved to a position against the link 10, the lock cylinder 32 is located in the first bore section 3511. The different positions of the connecting rod 10 and the different distances that the moving assembly can move result in different positions of the lock cylinder 32 in the moving assembly, which in turn can limit the rotation of the lock cylinder 32 and thus can limit whether the key 80 is allowed to be pulled out. With this structure, the disconnector operation hole cannot be opened when the key 80 is pulled out. The grounding switch operation hole can be opened by other interlocks, but the utility model is not limited thereto. Therefore, misoperation on opening of the disconnecting switch under the condition of closing of the disconnecting switch is avoided.

The extending direction of the first long hole 241 is perpendicular to the extending direction of the first waist hole 351, and the extending direction of the first long hole 241 is perpendicular to the extending direction of the second waist hole 361.

As an exemplary illustration, the key lock device further has a stopper 38, which can be fixed on the crank arm 103; in the case that the connecting rod 10 is located at the grounding position, the grounding scan plate 36 moves to the position blocked by the limiting member 38, the key cylinder 32 is located in the third hole segment 3611, and the grounding scan plate 36 may have a bent portion 362, through which the bent portion 362 contacts the limiting member 38, as shown in fig. 5 and 8. That is, when the link 10 is at the second position, the shutter member 23 can be freely moved. The position-limiting member 38 may be a screw. The stopper 38 can function only when the link 10 is in the ground contact position.

Alternatively, as shown in fig. 2, 4, 5 and 9, the link 10 has a projection 101, the projection 101 being able to contact the moving assembly with the link 10 in the closed position. This projection 101 enables the moving assembly to stay in the corresponding position to enable the lock cylinder 32 to rotate to the fourth position in case the connecting rod 10 is in the closed position, i.e. in case the disconnector is in the closed position.

Optionally, as shown in fig. 12, the lock core 32 includes a first group of cut surfaces 321 and a second group of cut surfaces 322, the first group of cut surfaces 321 are symmetrically disposed and located in the first waist hole 351 and the second waist hole 361, the second group of cut surfaces 322 are symmetrically disposed and perpendicular to the first group of cut surfaces 321, and the second group of cut surfaces 322 are located in the first long hole 241. Since the distance between the cut surfaces is smaller than the diameter of the key cylinder 32, the first group of cut surfaces 321, the first waist holes 351 and the second waist holes 361 can limit whether the key cylinder 32 can rotate in the horizontal scanning plate 35 and the ground scanning plate 36, the second group of cut surfaces 322 and the first long hole 241 can limit whether the key cylinder 32 can rotate in the first long hole 241, and further, the vertical scanning plate 24 can be limited whether to move.

Optionally, as shown in fig. 5, the key lock device further includes a fixing element 39, the crank arm 103 is connected to a contact mechanism, the crank arm 103 is sleeved on an operating shaft of the contact mechanism and fixed to the contact mechanism through the fixing element 39, one end of the fixing element 39 is fixed to a side of the crank arm 103 away from the contact mechanism, and the other end of the fixing element 39 is fixed to the contact mechanism. The fixing member 39 prevents the link 10 from falling off from the contact mechanism, and ensures the stability of the key lock device.

The utility model also provides a switch cabinet, which comprises the key lock device of the three-position operating switch in any embodiment.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A key lock device for a three-position switch, comprising:

a connecting rod (10) which can be switched between a switching-on position of a three-position switch, a grounding position of the three-position switch and a switching-off position of the three-position switch;

an operation hole assembly which is provided with an earthing switch operation hole, a disconnecting switch operation hole, a shielding component (23) and a vertical scanning plate (24), wherein the shielding component (23) is linked with the vertical scanning plate (24), the vertical scanning plate (24) can move back and forth in a first direction, and the shielding component (23) can be switched among a first position exposing the earthing switch operation hole, a second position shielding the two operation holes and a third position exposing the disconnecting switch operation hole;

its characterized in that, three station switches still include:

the lock box is provided with a baffle plate (31) and a moving assembly, the moving assembly is linked with the shielding part (23), the baffle plate (31) is provided with a lock cylinder (32), the lock cylinder (32) can rotate to a fourth position where a key (80) is allowed to be pulled out of the lock cylinder (32), and the lock cylinder (32) penetrates through the moving assembly;

when the connecting rod (10) is located at the switching-on position, the lock cylinder (32) can rotate to a fourth position, and the operation hole assembly is prohibited from moving to a third position;

when the link (10) is in the open position, the key cylinder (32) is displaced from the fourth position, and the operation hole assembly can be switched among the first position, the second position, and the third position.

2. The key lock device according to claim 1, wherein the moving assembly comprises a sliding plate (34), a horizontal scanning plate (35) and a ground scanning plate (36) in linkage, the horizontal scanning plate (35), the sliding plate and the ground scanning plate (36) being movable back and forth in a second direction, the first direction being perpendicular to the second direction.

3. The key lock device according to claim 2, wherein the vertical scanning plate (24) has a first long hole (241) and the first long hole (241) has a widened section (2411) in which the key cylinder (32) is rotatable, the horizontal scanning plate (35) has a first waist hole (351), the first waist hole (351) includes a first hole section (3511) and a second hole section (3512) which are communicated with each other, the second hole section (3512) has a larger hole diameter than the first hole section (3511), the ground-connected scanning plate 36(36) has a second waist hole (361), the second waist hole (361) includes a third hole section (3611) and a fourth hole section (3612) which are communicated with each other, the fourth hole section (3612) has a larger hole diameter than the third hole section (3611), the key cylinder (32) is inserted into the first long hole (241), the first waist hole (351) and the second waist hole (361), when the lock cylinder (32) rotates to a fourth position, the lock cylinder (32) is prohibited from moving in the first long hole (241), the lock cylinder (32) can rotate to the fourth position under the condition that the lock cylinder (32) is simultaneously positioned in the second hole section (3512) and the fourth hole section (3612), when the lock cylinder (32) rotates to a fifth position, the lock cylinder (32) can move in the first hole section (3511) and the third hole section (3611), and the rotation angle between the fourth position and the fifth position is 90 degrees;

with the link (10) in the closed position and the moving assembly moved to a position against the link (10), the lock cylinder (32) is located in the second bore section (3512) and the fourth bore section (3612);

with the link (10) in the open position and the moving assembly moved to a position against the link (10), the lock cylinder (32) is located in the first bore section (3511).

4. The key lock device according to claim 2, further comprising a fixing member, wherein the horizontal scanning plate (35) further comprises a second elongated hole, and the fixing member is located in the second elongated hole;

with the link (10) in the grounded position, the grounded scan plate (36) is moved to a position blocked by the fixed component, and the lock cylinder (32) is located in the third bore section (3611).

5. The key lock device according to claim 1, characterized in that the lever (10) has a protrusion (101), the protrusion (101) being capable of contacting the moving member in the closed position.

6. The key lock device according to claim 1, characterized in that the lock cylinder (32) comprises a first set of cut surfaces (321) and a second set of cut surfaces (322), the first set of cut surfaces (321) being symmetrically arranged and located in the first waist opening (351) and the second waist opening (361), the second set of cut surfaces (322) being symmetrically arranged and located perpendicular to the first set of cut surfaces (321), the second set of cut surfaces (322) being located in the first elongated opening (241).

7. The key lock device according to claim 2, wherein the moving member further comprises a first handle (37), the first handle (37) being fixed to the sliding plate (34) for moving the horizontal scanning plate (35) and the ground scanning plate (36) in the same direction by moving the sliding plate (34).

8. The key lock device according to claim 1, characterized in that the direction of extension of the first long hole (241) is perpendicular to the direction of extension of the first waist hole (351), and the direction of extension of the first long hole (241) is perpendicular to the direction of extension of the second waist hole (361).

9. The key lock device according to claim 1, further comprising a fixing member (39), wherein the connecting rod (10) comprises a rod (102) and a lever (103) connected to the rod (102), the lever (103) is connected to a contact mechanism, the lever (103) is fitted over an operating shaft of the contact mechanism and fixed to the contact mechanism via a fixing member (39), one end of the fixing member (39) is fixed to a side of the lever (103) away from the contact mechanism, and the other end of the fixing member (39) is fixed to the contact mechanism.

10. Switchgear cabinet, characterized in that it comprises a key lock device of a three-position operating switch according to any of claims 1-9.

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