CN109462168B - A handcart switch cabinet locking device - Google Patents

Abstract

The invention relates to the field of switch cabinets, in particular to a locking device for a handcart switch cabinet. It includes a reversing ring, a linkage rod, a base and a guide rod. The guide rod passes through the reversing ring. The reversing ring is provided with an internal thread, and the guide rod is provided with a threaded section. The reversing ring is rotated and set on the base. The reversing ring is provided with a connecting post, and the base is provided with a reversing slot, and the connecting post passes through the reversing slot. The main turntable and the transmission turntable are arranged on the base. The transmission turntable is hinged on the linkage rod. The transmission turntable and the main turntable are meshed through the transmission teeth. The middle part of the base is provided with a static contact hole and a hole cover. The hole cover is hinged on the base by several The movable plate is composed of a movable plate, and the movable plate is provided with a tie bar, and the two ends of the tie bar are respectively hinged on the movable plate and the main turntable. The invention has the advantages of compact structure and convenient operation, and can effectively prevent the handcart from getting stuck in the switch cabinet.

Description

A handcart switch cabinet locking device

technical field

The invention relates to the field of switch cabinets, in particular to a locking device for a handcart switch cabinet.

Background technique

In the handcart switch cabinet, the handcart is the main part of the withdrawable switch cabinet. After laying the guide rail, it can be pulled out from the switch cabinet by hand. During maintenance, only the handcart needs to be pulled out, which can shorten the scope of maintenance power failure. The static contact is located in the switch cabinet, and is generally closed by a locking device to prevent maintenance personnel from accidentally touching the static contact and causing power safety problems. The moving contact is located on the handcart, and the locking device is used when the handcart pushes the switch cabinet. Gradually open to combine the moving contact with the static contact. At present, the locking devices on the handcart switch cabinet are mostly realized by the opening and closing of mechanical linkage baffles. This kind of locking device has high resistance, which often causes the handcart to be stuck in the process of retreat , a dilemma, the way to deal with it is to expand the power outage range and stop the busbar for maintenance, which causes a lot of trouble.

China Patent Authorization Announcement No. CN 206432611 U, the date of the authorized announcement is 2017.08.22, the name is "a double-swing type handcart switch cabinet", which discloses a swing-in locking device, which meets the requirements of the double-line cabinet body, but This swing-in type locking device still does not solve the problem that the handcart is easy to get stuck in the process of retreating.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages in the prior art that the handcart is often stuck in the process of retreat due to the large resistance of the locking device, and to provide a handcart switch cabinet lock that can effectively prevent the handcart from being stuck in the switch cabinet. device.

In order to achieve the above object, the present invention adopts the following technical solutions:

A handcart switch cabinet locking device, comprising

The reversing ring, linkage rod, the base on the switch cabinet and the guide rod on the handcart, the guide rod passes through the reversing ring, the inner wall of the reversing ring is provided with internal threads, and the guide rod is provided with The internal thread is matched to the threaded section, the reversing ring is rotated and set on the base, the outer wall of the reversing ring is provided with a connecting column, the base is provided with a reversing groove, the connecting column passes through the reversing groove, and the connecting column Hinged on the linkage rod;

The linkage rod is provided with several locking mechanisms. The locking mechanism includes a base fixed on the switch cabinet, a main turntable mounted on the base for rotation, and a transmission turntable mounted on the base for rotation. The transmission turntable is hinged on the linkage rod. There are several transmission teeth on the main turntable, and the transmission turntable and the main turntable are meshed through the transmission teeth. The middle part of the base is provided with a static contact hole passing through the base and a hole cover covering the static contact hole. The hole cover is hinged by several The movable plate on the base is composed of a pull bar for pulling the movable plate, and the two ends of the pull bar are respectively hinged on the movable plate and the main turntable.

When the handcart is pulled out of the switch cabinet, the guide rod slides to the outside of the switch cabinet. When the threaded section slides to contact with the reversing ring, the moving contact has been pulled out from the switch cabinet at this time. As the handcart is further pulled out, the threaded section Make the reversing ring rotate clockwise, drive the linkage rod to move to the right, and then drive the transmission turntable to rotate clockwise, through the cooperation of the transmission teeth, drive the main turntable to rotate counterclockwise, drive the pull bar to shrink to the center of the static contact hole, and push All movable blocks shrink toward the center of the static contact hole, close the hole cover, complete the reliable locking of the static contact after the movable contact is pulled out of the switch cabinet, and prevent the operator from accidentally touching it.

When the handcart is pushed into the switch cabinet, the guide rod slides into the switch cabinet, the threaded section makes the reversing ring rotate counterclockwise, drives the linkage rod to move to the left, and then drives the transmission turntable to rotate counterclockwise, through the cooperation of the transmission teeth, Drive the main turntable to rotate clockwise, drive the locking bar to expand to the circumference of the static contact hole, pull all the movable blocks to open outward, and open the hole cover. When the hole cover is fully opened, the threaded section is separated from the reversing ring, and the handcart can Pushes into the switchgear very easily.

Preferably, the switch cabinet is provided with a sliding seat, and the sliding seat is provided with a slide hole for the guide rod to slide back and forth, the guide rod passes through the slide hole, and the threaded section is located between the slide seat and the base. It supports the sliding of the guide rod.

Preferably, the axis of the reversing ring is parallel to the sliding direction of the handcart. Make smooth contact between the diverter ring and the threaded segment.

Preferably, the base is provided with a plurality of guide columns, and the main turntable is provided with a plurality of arc-shaped guide holes corresponding to the guide columns one by one, and the guide columns are slidably arranged in the corresponding arc-shaped guide holes. The guide column and the arc-shaped guide hole cooperate to guide the rotation of the main turntable. At the same time, there is no need to install a rotating shaft in the middle of the base, saving space in the middle of the base, and facilitating the arrangement of static contact holes and hole covers.

Preferably, each guide post is located on the same circumference, and each arc-shaped guide hole is sequentially distributed along the circumference of the main turntable. Arranging each guide column and each arc-shaped guide hole on the same circumference further saves occupied space.

As a preference, the side wall of the static contact hole extends axially to form a hole cover seat, and the side wall of the hole cover seat is provided with a number of relief holes for the movable plate to pass through, and the movable plate passes through the corresponding relief hole . Ensure that the movable plate moves smoothly, and the relief hole also has a guiding effect on the movable plate, so as to ensure that the movable plates can be assembled into a flat hole cover.

Preferably, the side wall of the movable plate is composed of an outer arc surface, a first inner arc surface and a second inner arc surface, and in two adjacent movable plates: the second inner arc surface of the previous active plate and the second inner arc surface The first inner arc surface of the movable plate is bonded. When the static contact is closed, the joint gap between the movable plates is reduced, and at the same time, the movable plates will not interfere with each other when moving.

Preferably, the side of the transmission dial away from the transmission teeth extends radially to form a connection protrusion, the connection protrusion is hinged to the linkage rod, and the end of the connection protrusion is hinged to the linkage rod. Ensure that the transmission turntable does not interfere with the linkage rod.

The beneficial effects of the present invention are: (1) During the process of pulling out the handcart, the moving contact first moves out of the static contact hole and separates from the static contact, and then the hole cover is automatically closed to prevent the operator from accidentally touching the static contact hole, When the handcart is pushed in, the hole cover is automatically opened first, and then the moving contact enters the static contact hole to contact the static contact, which effectively prevents the handcart from being stuck in the switch cabinet; (2) the hole cover is opened or The closing and the pushing or pulling out of the handcart are a linkage process, and the whole process does not require other operations, which is more convenient for the staff to operate.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of another perspective of the present invention;

Fig. 3 is the structural representation of locking mechanism among the present invention;

Fig. 4 is the sectional view of A-A among Fig. 3;

Fig. 5 is the structural representation of hole cover of the present invention;

Fig. 6 is a structural schematic diagram of the commutation ring in the present invention.

In the figure: reversing ring 1, linkage rod 2, base 11, guide rod 12, threaded section 121, connecting column 13, slide seat 14, locking mechanism 3, base 4, guide column 41, arc guide hole 42, static Contact hole 43, movable plate 44, tie rod 45, hole cover seat 46, outer arc surface 441, first inner arc surface 442, second inner arc surface 443, main turntable 5, transmission turntable 6, connecting protrusion 61, Transmission gear 62, handcart 7, moving contact 71, switchgear 8, static contact 81.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The connection relationship between the handcart 7 and the switch cabinet 8 is consistent with the commonly used prior art, that is, the handcart is slid on the switch cabinet through the guide rail, the moving contact 71 is arranged on the handcart and moves with the sliding of the handcart, and the static contact 81 It is located on the switch cabinet.

As shown in Figure 1 to Figure 6, a handcart switch cabinet locking device, including

Reversing ring 1, linkage rod 2, base 11 on the switch cabinet and guide rod 12 on the handcart, the guide rod passes through the reversing ring, the inner wall of the reversing ring is provided with internal threads, and the guide rod There is a threaded section 121 matching the direction of the internal thread, and the reversing ring is rotated on the base. The axis of the reversing ring is parallel to the sliding direction of the handcart, so that the reversing ring and the threaded section can be in smooth contact. The outer wall of the reversing ring is provided with a connecting column 13, and the base is provided with a reversing groove, the connecting column passes through the reversing groove, and the connecting column is hinged on the linkage rod. The switch cabinet is provided with a sliding seat 14, and the sliding seat is provided with a sliding hole for the guide rod to slide back and forth. The guide rod passes through the sliding hole, and the threaded section is located between the sliding seat and the base. The sliding seat supports the sliding of the guide rod. .

A plurality of locking mechanisms 3 are arranged on the linkage rod, and the locking mechanisms include a base 4 fixed on the switch cabinet, a main turntable 5 rotatably arranged on the base, and a transmission turntable 6 rotatably arranged on the base. The base is provided with some guide posts 41, and the main turntable is provided with some arc guide holes 42 corresponding to the guide posts one by one. The guide posts are slidably arranged in the corresponding arc guide holes. Ideally, each guide post is located at the same On a circle, the arc-shaped guide holes are sequentially distributed along the circumference of the main turntable. The guide posts and the arc-shaped guide holes cooperate to guide the rotation of the main turntable. The side of the transmission turntable away from the transmission teeth extends radially to form a connecting protrusion 61, and the end of the connection protrusion is hinged on the linkage rod to ensure that the transmission dial does not interfere with the linkage rod. Both the transmission turntable and the main turntable are provided with a number of transmission teeth 62, and the transmission turntable and the main turntable are meshed through the transmission teeth. The middle part of the base is provided with a static contact hole 43 passing through the base and a hole cover covering the static contact hole. The cover is composed of a number of movable plates 44 hinged on the base. The side wall of the movable plate is composed of an outer arc surface 441, a first inner arc surface 442 and a second inner arc surface 443. Among the two adjacent movable plates: the previous one The second inner arc surface of the movable plate fits with the first inner arc surface of the next movable plate to reduce the splicing gap between the movable plates when the static contacts are closed, and at the same time, the movable plates will not interfere with each other when they move. The movable plate is provided with a tie bar 45 for pulling the movable plate, and the two ends of the tie bar are respectively hinged on the movable plate and the main turntable. The side wall of the static contact hole extends axially to form a hole cover seat 46, and the side wall of the hole cover seat is provided with some relief holes for the movable plate to pass through, and the movable plate passes through the corresponding relief holes to ensure that the movable plate The movement is stable, and the relief hole also has a guiding effect on the movable plate, ensuring that the movable plates can be assembled into a flat hole cover.

When maintenance is required, the handcart is pulled out of the switch cabinet, and the guide rod slides out of the switch cabinet. When the threaded section slides to contact with the reversing ring, the moving contact has been pulled out of the switch cabinet and separated from the static contact. The handcart is further pulled out, the threaded section makes the reversing ring rotate clockwise, drives the linkage rod to move to the right, and then drives the transmission turntable to rotate clockwise, through the cooperation of the transmission teeth, drives the main turntable to rotate counterclockwise, and drives the pull bar to move to the static The center of the contact hole shrinks, pushes all the movable blocks to shrink to the center of the static contact hole, closes the hole cover, completes the reliable locking of the static contact after the movable contact is pulled out of the switch cabinet, and prevents the operator from accidentally touching it.

After the maintenance is completed, push the handcart into the switch cabinet, the guide rod slides into the switch cabinet, the threaded section first cooperates with the reversing ring to make the reversing ring rotate counterclockwise, drives the linkage rod to move to the left, and then drives the transmission turntable counterclockwise Rotation, through the cooperation of the transmission teeth, drives the main turntable to rotate clockwise, drives the locking bar to expand to the circumference of the static contact hole, pulls all the movable blocks to open outward, and opens the hole cover. When the hole cover is fully opened, the threaded section Without the reversing ring, the handcart can be easily pushed into the switchgear.

The beneficial effects of the present invention are: in the process of pulling out the handcart, the moving contact first moves out of the static contact hole and separates from the static contact, and then the hole cover is automatically closed to prevent the operator from accidentally touching the static contact hole. In the process of pushing in, the hole cover is automatically opened first, and then the moving contact enters the static contact hole to contact the static contact, which effectively prevents the handcart from being stuck in the switch cabinet. Pushing in or pulling out is a linkage process, and the whole process does not require other operations, which is more convenient for the staff to operate.

Claims (7)

1. a kind of handcart switch cabinet blocking device, characterized in that including

Commutative ring, interlocking bar, the pedestal being located on switchgear and the guide rod being located on handcart, guide rod pass through commutative ring, commutative ring Inner sidewall be equipped with internal screw thread, guide rod is equipped with and the thread segment that matches of internal screw thread, commutative ring are rotatably arranged on pedestal, The lateral wall of commutative ring is equipped with connecting column, and pedestal is equipped with reversing groove, and connecting column passes through reversing groove, and connecting column is hinged on connection In lever；

The interlocking bar is equipped with blocking mechanism, and blocking mechanism includes the pedestal being fixed on switchgear, is rotatably arranged on pedestal On main turntable and the driving turntable that is rotatably arranged on pedestal, driving turntable be hinged in interlocking bar, driving turntable and main turn Several driving cogs, driving turntable and main turntable are equipped on disk by transmission tooth engagement, the middle part of pedestal is equipped with through pedestal Stationary contact head bore and the port lid being covered in stationary contact head bore, port lid is made of several movable plates being hinged on pedestal, on movable plate Equipped with for pulling the tie rod of movable plate, the both ends of tie rod are respectively hinged on movable plate and main turntable；

The side wall of the stationary contact head bore axially extends to form hole cage, and the side wall of hole cage is passed through equipped with several for movable plate Relief hole, movable plate pass through corresponding relief hole.

2. a kind of handcart switch cabinet blocking device according to claim 1, characterized in that the switchgear, which is equipped with, to be slided Seat, slide are equipped with the slide opening to slidably reciprocate for guide rod, and guide rod passes through slide opening, and thread segment is between slide and pedestal.

3. a kind of handcart switch cabinet blocking device according to claim 1 or 2, characterized in that the axis of the commutative ring It is parallel with the glide direction of handcart.

4. a kind of handcart switch cabinet blocking device according to claim 1 or 2, characterized in that if the pedestal is equipped with Dry guide post, main turntable are equipped with several and one-to-one arcuate guide hole of guide post, and guide post is slidably arranged in corresponding In arcuate guide hole.

5. a kind of handcart switch cabinet blocking device according to claim 4, characterized in that each guide post is located at the same circle Zhou Shang, each arcuate guide hole are sequentially distributed along the circumferential direction of main turntable.

6. a kind of handcart switch cabinet blocking device according to claim 1 or 2, characterized in that the side wall of the movable plate It is made of extrados, the first intrados and the second intrados, in two neighboring movable plate: the second inner arc of previous movable plate Face is bonded with the first intrados of the latter movable plate.

7. a kind of handcart switch cabinet blocking device according to claim 1 or 2, characterized in that the driving turntable is separate The side of driving cog radially extends to form connection bump, and the end of connection bump is hinged in interlocking bar.