CN114783803A

CN114783803A - Interlocking device for grounding switch of metal-enclosed switchgear and cable chamber door

Info

Publication number: CN114783803A
Application number: CN202210568247.8A
Authority: CN
Inventors: 张广伟
Original assignee: Jiangsu Dejite Electric Co ltd
Current assignee: Jiangsu Dejite Electric Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-07-22

Abstract

The invention provides an interlocking device for a grounding switch and a cable chamber door of metal-enclosed switchgear, which comprises a pressing device, wherein the pressing device comprises a button, the surface of the button is covered with a first connecting rod component used for covering the button, one end of the first connecting rod component, which is close to the button, is connected with a second spring, one end of the first connecting rod component, which is far away from the button, is movably connected with one end of a second connecting rod through a first pin shaft, the other end of the second connecting rod is movably connected with a first cam transmission mechanism, the upper end of the first cam transmission mechanism is fixedly connected with an engaging device, the lower end of the cam transmission mechanism is fixedly connected with a transmission plate through a connecting rod, and the transmission plate is fixedly connected with the second cam transmission mechanism. The invention can save the space in the box body so as to save the material cost of the box body, accords with the development direction of miniaturization and lightness of equipment, effectively prevents the cable chamber door from sliding off, and avoids electric shock caused by exposure of the live equipment to operators.

Description

Interlocking device for grounding switch of metal-enclosed switchgear and cable chamber door

Technical Field

The invention relates to the technical field of interlocking devices of a grounding switch and a cable chamber door, in particular to an interlocking device of a grounding switch and a cable chamber door of a metal-enclosed switchgear.

Background

The cable chamber door of the existing 12kV indoor box type alternating current metal enclosed switchgear is of an upturned door structure, and the interior of the cable chamber door is formed by riveting and assembling high-strength sheet metal parts. When the indoor box type alternating current metal closed switch equipment runs normally, an operator can open a cable chamber door at will and mistakenly enter a live interval, so that the safety requirement of 12kV switch equipment is seriously violated, and therefore an interlocking device between the grounding switch and the cable chamber door needs to be installed to meet the safety requirement. There are many interlocks about switchgear's earthing switch and cable chamber door among the prior art, for example application publication No. CN101533992B a metal enclosed switchgear earthing switch and cable chamber door interlock, through adjusting the position of driving plate in the support rectangular channel to and readjust the pressure of double-screw bolt ball jackscrew to the driving plate, guarantee that the driving plate can freely move from top to bottom in the support rectangular channel, thereby realize the transmission between cable chamber door and operating device, accommodation process is simple and convenient. However, the following disadvantages exist: (1) because the locking support part is of a U-shaped bent plate structure, the self volume occupies too large space, and the mechanism limiting block and the grounding switch operating shaft need to rotate a special operating handle by an operator to complete the opening and closing operation of the grounding switch, so that enough space needs to be released around to operate equipment; (2) the dead man on the transmission board is pressed to manual the downward rectilinear motion of dead man messenger transmission board, inserts in the V font opening of hasp board upper end, and jamming and locking hasp board because operating personnel's manual operation just has the uneven condition of strength, when operating personnel exert oneself when too big, will cause the motion angle of hasp board too big, utilizes first cylindric lock complex cable chamber door of lug and hasp board can the landing, makes live equipment expose in the front of operating personnel, has the risk of electrocuteeing.

Disclosure of Invention

The invention aims to provide an interlocking device of a metal closed switch equipment grounding switch and a cable chamber door, which can realize the opening and closing operation of the grounding switch and prevent the misoperation of the grounding switch under the conditions of not increasing the volume of a box body, realizing the miniaturization and lightening of equipment, and can also ensure that a lock catch plate and the cable chamber door can be effectively clamped and separated, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an interlocking device of a grounding switch of a metal enclosed switchgear and a cable chamber door comprises a pressing device, the pressing device comprises a button, the surface of the button is covered with a first connecting rod component used for covering the button, one end of the first connecting rod component, which is close to the button, is connected with a second spring, one end of the first connecting rod component, which is far away from the button, is movably connected with one end of a second connecting rod through a first pin shaft, the other end of the second connecting rod is movably connected with a first cam transmission mechanism, the upper end of the first cam transmission mechanism is fixedly connected with an engaging device, the lower end of the cam transmission mechanism is fixedly connected with a transmission plate through a connecting rod, the transmission plate is fixedly connected with a second cam transmission mechanism, the second cam transmission mechanism comprises a baffle plate, and the baffle plate is used for blocking a buckle plate installed on the cable chamber door from being buckled and fixed by the transmission plate.

Preferably, the button outer lane still overlaps and is equipped with the second spacing groove, the third spout has been seted up to second spacing inslot portion, elastic connection has first spring between the top of button and the bottom of third spout, press device is including still pressing the lug, press the lug terminal with the top fixed connection of button, it has a plurality of arch to press the even welding of lug surface, form the slot between every adjacent arch.

Preferably, the bottom of second spacing groove and just to pressing down the position welding of lug have a fourth spout, the slide has still evenly been seted up on the fourth spout inner wall, the draw-in groove has still been welded to second spacing groove both sides, the top center nestification of button has the bearing, the dwang is worn to be equipped with at the bearing center, the one end fixedly connected with rotary rod of bearing is kept away from to the dwang.

Preferably, the first cam transmission mechanism comprises a first cam and a first sliding block movably connected with the first cam, and the first cam is fixedly connected with the second connecting rod through a second pin shaft.

Preferably, the meshing device comprises a first rack, a gear meshed with the first rack and a second rack meshed with the other side of the gear, the other end of the first rack is connected with a first sliding rod, the first sliding rod is connected with a first sliding groove in a first sliding body in a sliding mode, one end of the second rack is connected with a second sliding rod, the second sliding rod is connected with a second sliding groove in a second sliding body in a sliding mode, and the other end of the second rack is connected with a handle.

Preferably, the second cam transmission mechanism comprises a third cam transmission mechanism and a fourth cam transmission mechanism which are arranged on two sides of the transmission plate, and the third cam transmission mechanism and the fourth cam transmission mechanism respectively comprise a second cam, a third connecting rod fixedly connected with the second cam and a fourth connecting rod fixedly connected with the third connecting rod.

Preferably, the shape of the transmission plate is an inverted isosceles trapezoid, a smooth long waist hole is formed in the middle of the transmission plate from top to bottom, the long waist hole is penetrated by a threaded pin fixed on the operation plate, and the first slider is in a right trapezoid shape.

Preferably, the first connecting rod assembly comprises a first rotating rod and a second rotating rod, a connecting block is fixedly connected to the end portion of the first rotating rod, a groove is formed in one end of the second rotating rod, the connecting block, the groove and the sliding connection are connected, the first rotating rod is movably connected to the first limiting groove through a third pin shaft, and a first guide groove is sleeved on the outer ring of the second connecting rod.

Preferably, the outer ring of the third connecting rod is sleeved with a second guide groove, and the outer ring of the baffle is sleeved with a third guide groove.

Compared with the prior art, the invention has the beneficial effects that:

a button and a second limiting groove sleeved outside the button are utilized, a third sliding groove is arranged inside the second limiting groove, a first spring is elastically connected between the top of the button and the bottom of the third sliding groove, the tail end of a pressing lug is fixedly connected with the top end of the button, a plurality of bulges are uniformly welded on the outer surface of the pressing lug, a groove is formed between every two adjacent bulges, a fourth sliding groove is welded at the bottom of the second limiting groove and just opposite to the position of the pressing lug, a slide way is uniformly arranged on the inner wall of the fourth sliding groove, clamping grooves are also welded at two sides of the second limiting groove, a bearing is nested in the top center of the button, a rotating rod is arranged in the center of the bearing in a penetrating manner, one end of the rotating rod, which is far away from the bearing, is fixedly connected with a rotating rod, and enough space rotating mechanism limiting blocks and grounding switch operating shafts do not need to be released around, the space in the box body can be saved so as to save the material cost of the box body, and the development direction of miniaturization and lightness of equipment is also met; the buckle plate is set to be fixed and does not flexibly rotate, the first rack, the gear and the second rack of the handle and the meshing device are utilized, the transmission plate can be effectively and conveniently inserted into and withdrawn from the buckle plate, strength is uniform and controllable, the cable chamber door is effectively prevented from slipping, and the electrified equipment is prevented from being exposed to cause electric shock in front of an operator.

Drawings

FIG. 1 is a schematic view of the non-actuated overall structure of the earthing switch and cable chamber door interlock of the present invention;

FIG. 2 is a schematic view of the overall structure of the earthing switch and cable chamber door interlock of the present invention;

FIG. 3 is a schematic view of a connection structure of the ground button and the second limiting groove and the rotary rod according to the present invention;

FIG. 4 is a schematic view of the connection structure of the third cam gear and the fourth cam gear of the present invention;

FIG. 5 is a schematic view of the structure of the protrusion and the fourth sliding groove of the present invention;

FIG. 6 is a schematic structural view of the grounding button of the present invention when not grounded;

FIG. 7 is a schematic view of the grounding button of the present invention;

FIG. 8 is a schematic view of a card slot of the present invention;

fig. 9 is a schematic view of the connection of the first rotating bar and the second rotating bar of the present invention.

In the figure: 1 grounding button, 2 first connecting rod component, 3 pressing device, 4 first cam transmission mechanism, 5 meshing device, 6 connecting rod, 7 transmission plate, 8 second cam transmission mechanism, 9 baffle plate, 10 cable chamber door, 11 pinch plate, 12 second connecting rod, 13 first pin shaft, 14 first cam, 15 first slider, 16 second pin shaft, 17 first rack, 18 gear, 19 second rack, 20 first slide rod, 21 first slide body, 22 first slide groove, 23 second slide rod, 24 second slide body, 25 second slide groove, 26 handle, 27 third cam transmission mechanism, 28 fourth cam transmission mechanism, 29 second cam, 30 third connecting rod, 31 fourth connecting rod, 32 long waist hole, 33 operating plate, 34 threaded pin, 35 first limiting groove, 36 slide way, 37 first guiding groove, 38 second guiding groove, 39 third guiding groove, 40 second limiting groove, 41 third slide groove, 42 first spring, 43 pressing convex block, 44 protrusion, 45 groove, 46 fourth sliding groove, 47 clamping groove, 48 bearing, 49 rotating rod, 50 rotating rod, 51 first rotating rod, 52 second rotating rod, 53 connecting block, 54 groove, 55 third pin shaft and 56 second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment is as follows:

referring to fig. 1 to 9, the present invention provides a technical solution:

an interlocking device for a grounding switch and a cable chamber door of a metal-enclosed switchgear, as shown in fig. 1, comprises a pressing device 3, wherein the pressing device 3 comprises a button 1, the surface of the button 1 is covered with a first connecting rod component 2 for covering the button 1, one end of the first connecting rod component 2 close to the button 1 is connected with a second spring 56, one end of the first connecting rod component 2 far away from the button 1 is movably connected with one end of a second connecting rod 12 through a first pin 13, as shown in fig. 9, the first connecting rod component 2 comprises a first rotating rod 51 and a second rotating rod 52, the end of the first rotating rod 51 is fixedly connected with a connecting block 53, one end of the second rotating rod 52 is provided with a groove 54, the connecting block 53 is slidably connected with the groove 54, as shown in fig. 1, the first rotating rod 51 is movably connected with a first limiting groove 35 through a third pin 55, an outer ring of the second connecting rod 12 is sleeved with a first guide groove 37, first connecting rod subassembly 2 can be clockwise and anticlockwise rotation in first spacing groove 35, as shown in fig. 1, the other end and the 4 swing joint of first cam drive mechanism of second connecting rod 12, the outer lane cover of second connecting rod 12 is equipped with first guide way 37, the upper end and the 5 fixed connection of engagement device of first cam drive mechanism 4, connecting rod 6 and driving plate 7 fixed connection are passed through to the lower extreme of cam drive mechanism 4, first cam drive mechanism 4 include first cam 14 and with first cam 14 swing joint's first slider 15, the shape of first slider 15 is right trapezoid, first cam 14 through second round pin axle 16 with second connecting rod 12 fixed connection.

As shown in fig. 1, the engaging means 5 includes a first rack 17 and a gear 18 engaged with the first rack 17, and a second rack 19 engaged with the other side of the gear 18, the other end of the first rack 17 is connected with a first slide bar 20, the first sliding rod 20 is connected with a first sliding chute 22 arranged in the first sliding body 21 in a sliding manner, one end of the second rack 19 is connected with a second slide bar 23, the second slide bar 23 is connected with a second slide groove 25 arranged in a second slide body 24 in a sliding way, the other end of the second rack 19 is connected with a handle 26, the shape of the transmission plate 7 is an inverted isosceles trapezoid, as shown in figure 4, a smooth long waist hole 32 is formed in the middle of the transmission plate 7 from top to bottom, the long waist hole 32 is penetrated by a threaded pin 34 fixed on an operation plate 33, and the transmission plate 7 is fixedly connected with the second cam transmission mechanism 8.

In the invention, the connecting block 53 on the first rotating rod 51 is matched with the groove 54 formed on the second rotating rod 52, so that the second connecting rod 12 can move left and right in the horizontal direction, the first connecting rod assembly 2 can rotate by taking the third pin shaft 55 as a center, the first connecting rod assembly 2 is driven to drive the second spring 56 to rotate anticlockwise in the process that the second connecting rod 12 moves horizontally rightwards, and the elastic action of the second spring 56 can automatically drive the first connecting rod assembly 2 to return to the initial position.

In the invention, in order to ensure the reliability of the up-and-down linear motion of the transmission plate 7, the middle part of the transmission plate 7 is provided with the smooth long waist hole 32 from top to bottom, and the long waist hole 32 can ensure that the transmission plate 7 is inserted into the buckle plate 11 in a linear motion manner, effectively fix the buckle plate 11 and ensure that the cable chamber door 10 cannot be opened.

As shown in fig. 1, the second cam transmission mechanism 8 includes a baffle plate 9, as shown in fig. 4, a third guide groove 39 is sleeved on an outer ring of the baffle plate 9, as shown in fig. 4, the second cam transmission mechanism 8 further includes a third cam transmission mechanism 27 and a fourth cam transmission mechanism 28 which are arranged on two sides of the transmission plate 7, the third cam transmission mechanism 27 and the fourth cam transmission mechanism 28 both include a second cam 29 and a third connecting rod 30 fixedly connected with the second cam 29, and a fourth connecting rod 31 fixedly connected with the third connecting rod 30, and a second guide groove 38 is sleeved on an outer ring of the third connecting rod 30.

As shown in fig. 3, a second limiting groove 40 is further sleeved on the outer ring of the button 1, as shown in fig. 6, a third sliding groove 41 is formed inside the second limiting groove 40, a first spring 42 is elastically connected between the top of the button 1 and the bottom of the third sliding groove 41, the pressing device 3 comprises a pressing bump 43, the end of the pressing bump 43 is fixedly connected with the top end of the button 1, a plurality of protrusions 44 are uniformly welded on the outer surface of the pressing bump 43, a groove 45 is formed between every two adjacent protrusions 44, a fourth sliding groove 46 is welded at the bottom of the second limiting groove 40 and at the position right opposite to the pressing bump 43, a sliding way 36 is further uniformly formed on the inner wall of the fourth sliding groove 46, clamping grooves 47 are further welded at two sides of the second limiting groove 40, as shown in fig. 8, the clamping grooves 47 are arranged in a shape with opposite opening directions, as shown in fig. 6, a bearing 48 is nested in the center of the top of the button 1, a rotating rod 49 is arranged in the center of the bearing 48 in a penetrating manner, and one end, far away from the bearing 48, of the rotating rod 49 is fixedly connected with a rotating rod 50.

In the invention, the purpose of welding the clamping groove 47 on the second limiting groove 40 is to fix the button 1 without springback when the pressing lug 43 is inserted into the fourth sliding groove 46, and the purpose of elastically connecting the spring 42 between the top of the button 1 and the bottom of the third sliding groove 41 is to withdraw the pressing lug 43 from the fourth sliding groove 46 by using the elasticity of the first spring 42 after the clamping between the rotating rod 50 and the clamping groove 47 is released, so that the grounding switch is set to be a pressing type, on one hand, the space can be saved, on the other hand, the button 1 can be conveniently operated, the effective clamping between the pressing lug 43 and the fourth sliding groove 46 can be realized, and the grounding operation can be completed.

The working principle of the interlocking device of the grounding switch of the metal enclosed switchgear and the cable chamber door is as follows:

procedure for opening the cable chamber door 14: when the button 1 is pressed to enable the pressing bump 43 to be inserted into the fourth sliding groove 46, the "closing" operation of the grounding switch is completed, the handle 26 is operated downwards, the second rack 19 drives the second slide bar 23 to slide downwards in the second sliding groove 25, the first rack 17 drives the first slide bar 20 to slide upwards in the second sliding groove 22 by utilizing the meshing action of the first rack 17, the gear 18 and the second rack 19, the first rack 17 drives the first slide bar 15 to move upwards in the upward linear motion process of the first rack 17, during the upward linear motion process of the first slide bar 15, on one hand, the first cam 14 and the second link 12 are driven to move straightly towards the right, the first link assembly 2 is driven to rotate anticlockwise until the first link assembly 2 can cover the pressing button 1 to stop the handle 26, the misoperation of the grounding switch by an operator can be prevented, on the other hand, the link 6 is driven to drive the operating plate 7 to slide upwards, until the transmission plate 7 slides out of the buckle plate 11, the transmission plate 7 has failure in motion clamping and locking performance of the buckle plate 11, the cable chamber door 10 is manually lifted, in the upward motion process of the buckle plate 11, the second cams 29 on the third cam transmission mechanism 27 and the fourth cam transmission mechanism 28 are respectively driven to drive the third connecting rod 30 to move in opposite directions, and in the opposite motion process of the third connecting rod 30, the baffle plates 9 are driven to slide in opposite directions until downward linear motion of the transmission plate 7 caused by misoperation can be prevented.

Procedure for closing the cable chamber door 14: inserting the cable chamber door 10 into the cable chamber, pressing the button 1 to withdraw the pressing lug 43 from the fourth sliding slot 46, completing the "on" operation of the grounding switch, operating the handle 26 upward to make the second rack 19 drive the second slide bar 23 to slide upward in the second sliding slot 25, making the first rack 17 drive the first slide bar 20 to slide downward in the second sliding slot 22 by the meshing action of the first rack 17, the gear 18 and the second rack 19, driving the first slider 15 to move downward during the downward linear motion of the first rack 17, driving the first cam 14 and the second link 12 to move linearly leftward to rotate the first link assembly 2 clockwise during the downward linear motion of the first rack 17, driving the connecting rod 6 to drive the driving plate 7 to slide downward during the downward motion of the buckle plate 11, the second cams 29 on the third cam transmission mechanism 27 and the fourth cam transmission mechanism 28 are respectively driven to drive the third connecting rods 30 to move reversely, and in the process that the third connecting rods 30 move reversely, the baffle plates 9 are driven to slide in opposite directions until the transmission plate 7 can move linearly downwards into the buckle plate 11, and the buckle plate 11 is blocked and locked.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a metal enclosed switchgear earthing switch and cable chamber door interlock, its characterized in that includes press device (3), press device (3) is including button (1), button (1) surface covering has first connecting rod subassembly (2) that are used for hiding button (1), the one end that first connecting rod subassembly (2) are close to button (1) is connected with second spring (56), and the one end of keeping away from button (1) is through the one end swing joint of first round pin axle (13) and second connecting rod (12), the other end and the first cam drive mechanism (4) swing joint of second connecting rod (12), the upper end and the engagement device (5) fixed connection of first cam drive mechanism (4), the lower extreme of cam drive mechanism (4) passes through connecting rod (6) and driving plate (7) fixed connection, driving plate (7) and second cam drive mechanism (8) fixed connection, the second cam transmission mechanism (8) comprises a baffle plate (9), and the baffle plate (9) is used for blocking the transmission plate (7) to clamp and fix a buckle plate (11) installed on the cable chamber door (10).

2. The interlocking device for the earthing switch and the cable chamber door of the metal enclosed switchgear according to claim 1, wherein a second limiting groove (40) is further sleeved on an outer ring of the button (1), a third sliding groove (41) is formed inside the second limiting groove (40), a first spring (42) is elastically connected between the top of the button (1) and the bottom of the third sliding groove (41), the pressing device (3) comprises a further pressing bump (43), the tail end of the pressing bump (43) is fixedly connected with the top end of the button (1), a plurality of protrusions (44) are uniformly welded on the outer surface of the pressing bump (43), and a groove (45) is formed between every two adjacent protrusions (44).

3. The interlocking device for the earthing switch and the cable chamber door of the metal enclosed switchgear according to claim 2, characterized in that a fourth sliding groove (46) is welded at the bottom of the second limiting groove (40) just opposite to the position where the pressing protrusion (43) is pressed, a sliding channel (36) is further uniformly formed on the inner wall of the fourth sliding groove (46), clamping grooves (47) are further welded on two sides of the second limiting groove (40), a bearing (48) is nested in the center of the top of the button (1), a rotating rod (49) is arranged in the center of the bearing (48) in a penetrating manner, and a rotating rod (50) is fixedly connected at one end, far away from the bearing (48), of the rotating rod (49).

4. The interlocking device for the earthing switch and the cable chamber door of the metal enclosed switchgear according to claim 1, characterized in that the first cam transmission mechanism (4) comprises a first cam (14) and a first sliding block (15) movably connected with the first cam (14), and the first cam (14) is fixedly connected with the second connecting rod (12) through a second pin shaft (16).

5. The interlocking device of the earthing switch and the cable chamber door of the metal enclosed switchgear, according to claim 1, characterized in that the engaging device (5) comprises a first rack (17) and a gear (18) engaged with the first rack (17), and a second rack (19) engaged with the other side of the gear (18), the other end of the first rack (17) is connected with a first sliding rod (20), the first sliding rod (20) is connected with a first sliding chute (22) opened in a first sliding body (21) in a sliding manner, one end of the second rack (19) is connected with a second sliding rod (23), the second sliding rod (23) is connected with a second sliding chute (25) opened in a second sliding body (24) in a sliding manner, and the other end of the second rack (19) is connected with a handle (26).

6. The metal enclosed switchgear grounding switch and cable chamber door interlocking device as claimed in claim 1, characterized in that the second cam transmission mechanism (8) comprises a third cam transmission mechanism (27) and a fourth cam transmission mechanism (28) which are arranged at both sides of the transmission plate (7), and the third cam transmission mechanism (27) and the fourth cam transmission mechanism (28) each comprise a second cam (29), a third connecting rod (30) fixedly connected with the second cam (29), and a fourth connecting rod (31) fixedly connected with the third connecting rod (30).

7. The interlocking device of the earthing switch and the cable chamber door of the metal enclosed switchgear as claimed in claim 4, wherein the shape of the driving plate (7) is an inverted isosceles trapezoid, a smooth long waist hole (32) is opened in the middle of the driving plate (7) from top to bottom, the long waist hole (32) is penetrated by a threaded pin (34) fixed on an operation plate (33), and the shape of the first sliding block (15) is a right trapezoid.

8. The interlocking device for the earthing switch and the cable chamber door of the metal enclosed switchgear, according to claim 1, wherein the first connecting rod assembly (2) comprises a first rotating rod (51) and a second rotating rod (52), a connecting block (53) is fixedly connected to the end of the first rotating rod (51), a groove (54) is formed in one end of the second rotating rod (52), the connecting block (53) is slidably connected with the groove (54), the first rotating rod (51) is movably connected to the first limiting groove (35) through a third pin shaft (55), and a first guide groove (37) is sleeved on the outer ring of the second connecting rod (12).

9. The interlocking device of the earthing switch and the cable chamber door of the metal enclosed switchgear, as claimed in claim 6, wherein the outer ring of the third link (30) is sleeved with the second guide groove (38), and the outer ring of the baffle (9) is sleeved with the third guide groove (39).