CN110112671A - A kind of plug-in distribution box multifunctional combination latch mechanism - Google Patents

Abstract

In the multifunctional interlocking mechanism of the plug-in distribution box of the present invention, when the box door is opened, the clamping plate is located in the vertical position, which restricts the upward rotation of the swing arm, and cannot push the switch of the molded case circuit breaker to close, and passes through the top plate when the box door is closed. Push the card plate to rotate away from the vertical limit position, the swing arm can rotate upwards to push the switch of the molded case circuit breaker to close, and at the same time, the main shaft of the bus contact on-off operating mechanism is driven to rotate through the interlock plate and the pull rod to lock the plug-in state of the bus ;During the closing process, the hook rotates upward with the swing arm and is inserted to the matching limit of the slot plate, and the box door cannot be opened; one operation can simultaneously complete the opening and closing interlocking of the box door switch and the molded case circuit breaker, and the box door switch The double interlocking function of interlocking with the bus power supply, the structure is simple and compact, the operation is convenient, the volume is small, and it is safe and reliable.

Description

A plug-in distribution box multifunctional interlocking mechanism

technical field

The invention relates to a multifunctional interlocking mechanism of a plug-in distribution box in a busbar system of power transmission and distribution equipment in the electric power industry.

Background technique

The busbar system in power transmission and distribution products in the power industry usually taps the current for the equipment through the distribution box and the plug-in unit. The system is a high-voltage equipment, and the power distribution box and the plug-in unit need to ensure the safety of power consumption during the opening and closing operation. Therefore, the distribution box and the plug-in unit must meet the following requirements when taking power through the bus: a. The cabinet door is closed In the locked state, the operator can close the molded case circuit breaker; b. The power-taking unit cannot be plugged and unplugged under load; in the prior art, two sets of independent interlocking devices are generally installed, which needs to be performed twice The operation is locked or unlocked separately, and the two sets of devices need to be carried out in a certain sequence of operations. The structure is complex and takes up a lot of space. Special tools are required for interlocking and unlocking. The steps in the actual operation process are cumbersome, and the installation and connection operations are inconvenient.

Contents of the invention

The technical problem to be solved by the present invention is to provide a double interlocking function that can simultaneously have the opening and closing interlocking of the cabinet door switch and the molded case circuit breaker, and the interlocking of the cabinet door switch and the bus power supply. The structure is simple and compact. Easy to operate, small size plug-in distribution box with multi-functional interlocking mechanism.

The multifunctional interlocking mechanism of the plug-in type distribution box of the present invention is characterized in that it includes a plug-in type distribution box body, and a molded case circuit breaker is fixedly installed inside the box body through a vertical partition. The side is provided with a door that can be rotated and opened, and the rear of the box is provided with a busbar contact;

The swing arm that can push the switch operation of the molded case circuit breaker to open and close is hingedly installed on the side plate of the box body. The side plate of the box body is located above the front end of the swing arm. A top plate that can push the clamp to rotate around the hinge point is fixedly installed at the corresponding position of the clamp; a hook is fixedly installed on the bottom surface of the swing arm near the end; The hook is matched with the limit slot plate; the middle part of the swing arm is hingedly installed on the side plate of the box body, and the rear end is hingedly connected with an interlocking plate arranged along the vertical direction. There is a pulling rod arranged obliquely, and the lower end of the pulling rod is connected with a main shaft of the busbar contact on-off operating mechanism extending backward in the horizontal direction;

The front end of the swing arm is fixedly connected with a crossbar, the middle part of the crossbar is provided with a switch hole, and the upper and lower sides of the switch hole are respectively fixedly connected with L-shaped switch pullers;

The front section of the swing arm is provided with a pin shaft, and a cam plate is hingedly installed in the space between the swing arm and the side plate of the box body, and an operating shaft is fixedly connected to the cam plate, and the operating end of the operating shaft extends through the side plate of the box body to Outside the box;

The cam plate is a sector plate, and the central angle corresponding to the sector plate is 90°;

The operating axis is a square axis;

A pair of mounting ears protruding backward are provided on both sides of the top of the clamping plate, and the pair of mounting ears are hingedly mounted on the side plate of the box body through bolts, and the part of the bolt located between the pair of mounting ears is fitted with a return spring;

The return spring is a cylindrical helical torsion spring;

The cross-section of the channel plate is a horizontal U-shaped structure, forming a U-shaped channel plate, and the hook is a C-shaped locking plate whose opening direction is opposite to the opening direction of the U-shaped channel plate;

The top plate is an L-shaped plate, and the front end of the top plate is fixedly connected to the inner surface of the box door through a fixed plate;

The rear side plate of the box body is provided with a busbar contact connection window. One end of the main shaft of the busbar contact on-off operating mechanism is hingedly mounted on the middle partition of the box body through the mounting seat, and the other end extends through the busbar contact connection window to the outside of the box.

In the multifunctional interlocking mechanism of the plug-in distribution box of the present invention, when the box door is opened, the clamping plate is located in the vertical position, which restricts the upward rotation of the swing arm, and cannot push the switch of the molded case circuit breaker to close, and passes through the top plate when the box door is closed. Push the card plate to rotate away from the limit position in the vertical direction, the swing arm can rotate upwards to push the switch of the molded case circuit breaker to close, and at the same time drive the main shaft of the bus contact on-off operating mechanism to In the pull-out state; during the closing process, the hook rotates upwards with the swing arm and inserts to the matching limit of the slot plate, and the box door cannot be opened; one operation can simultaneously complete the opening and closing interlocking of the box door switch and the molded case circuit breaker, and the box cabinet The double interlocking function of the door switch and the bus power supply is simple and compact in structure, easy to operate, small in size, safe and reliable.

1. The equipment is designed through the fool-proof mechanism, and can only be inserted into the busbar system when the molded case circuit breaker is off, and locked, so as to avoid potential safety hazards caused by power connection with load;

2. The operating shaft rotates forward, and the interlock pulls the switch of the molded case circuit breaker to close; the double interlock device is mechanically driven during the closing operation: (1) The box body and the box door are locked, and the power distribution box is powered on The door cannot be opened under the condition that the operator cannot touch the electrified body to ensure personal safety; (2) Realize the interlocking of the power-taking equipment (distribution box) and the bus device (power supply body), and cannot be pulled out when the power is on Distribution box, to avoid personal injury caused by plugging and unplugging under load;

3. The operating shaft rotates in the opposite direction, breaking, and interlocking to pull the switch of the molded case circuit breaker to open. At the same time, all the above interlocking functions are immediately released. Access to the inside of the electrical box can also be safely removed (pulled out) at any time.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the multifunctional interlocking mechanism of the plug-in distribution box according to the embodiment of the present invention after removing the box shell;

Fig. 2 is a three-dimensional structural schematic diagram of another perspective after the multifunctional interlocking mechanism of the plug-in distribution box of the embodiment of the present invention is removed from the box shell;

Fig. 3 is a three-dimensional structural schematic diagram of the multifunctional interlocking mechanism of the plug-in distribution box according to the embodiment of the present invention after removing the box shell and the box door;

Fig. 4 is a three-dimensional structure schematic diagram of another perspective after the multifunctional interlocking mechanism of the plug-in distribution box according to the embodiment of the present invention is removed from the box body shell and the box door;

Fig. 5 is a schematic diagram of the three-dimensional structure of the hook and the groove plate, the top plate and the clamping plate when the multifunctional interlocking mechanism of the plug-in distribution box is closed according to the embodiment of the present invention;

Figures 6 to 9 are schematic diagrams of the three-dimensional structure of the multi-functional interlocking mechanism of the plug-in type distribution box according to the embodiment of the present invention after the box door is removed;

Fig. 10 is a schematic plan view of the multifunctional interlocking mechanism of the plug-in distribution box according to the embodiment of the present invention after the box door is removed;

Fig. 11 is the right view of Fig. 10;

Fig. 12 is a schematic plan view of the multi-functional interlocking mechanism of the plug-in distribution box according to the embodiment of the present invention after removing the side panels of the box body.

Detailed ways

As shown in the figure, a plug-in distribution box multi-functional interlocking mechanism, the internal space of the plug-in distribution box is divided into two parts by the vertical middle partition, on the front side of the vertical middle partition The plastic case circuit breaker 2 is fixedly installed, and the bus contact 3 is installed at the rear. The bus contact connection window is set outside the rear side panel of the box body. The front side of the box body is hingedly installed with a box door 1, and the box door 1 can be rotated to open or close through the hinge.

First, a cam plate 51 is hingedly installed on the side plate of the plug-in distribution box. The cam plate is a fan-shaped plate, and the central angle corresponding to the fan-shaped plate can be selected from 60° to 120°. In this example, the central angle is 90° °, the manufacturing process is simple; the hinge shaft of the cam plate is a square shaft, and the square shaft passes through the side plate of the box body and extends to the outside to form an operating shaft 5 that can be connected to the operating handle; the side plate of the box body is connected to the cam plate The corresponding position is hingedly connected to a swing arm 4, the rear section of the swing arm 4 is hingedly connected to the side plate of the box body, a pin shaft is installed in the front section, the operating handle drives the cam plate to rotate through the operating shaft, and the cam plate pushes the swing arm through the pin shaft Rotate around the hinge point; the front end of the swing arm is connected to a cross bar, and a rectangular window is set in the middle of the cross bar to form a switch hole that can accommodate the switch handle of the molded case circuit breaker. When the swing arm rotates, the switch handle is pushed through the switch hole to operate the molded case The circuit breaker is opened or closed; the L-shaped switch puller can be fixedly connected to the upper and lower sides of the switch hole, and the switch puller contacts the switch handle through the arc surface to avoid friction and damage to the switch handle.

A clamping plate 12 is hingedly installed at the position above the front end of the swing arm 4 on the side plate of the box body. The clamping plate 12 is in a vertical position when the box door is opened, and the limit prevents the swing arm from rotating upwards, that is, the molded case circuit breaker cannot be closed. brake.

A top plate 11 is fixedly installed on the inner surface of the door opening side of the box door 1 at the corresponding position of the clamp plate 12. When the door is closed, the top plate bears against the top of the clamp plate, and the clamp plate is pushed to rotate around the hinge point to leave the limit position in the vertical direction. The arm can rotate upwards to push the switch of the molded case circuit breaker to close, the top plate can push the pallet to rotate to a horizontal position, and the swing arm can be operated flexibly; an oblique limit rod can also be fixedly connected to the top of the pallet to provide a limit.

A grab 42 is fixedly installed near the end on the bottom surface of the swing arm 4, and a slotted plate 10 is fixedly installed at a position corresponding to the hook 42 on the inner side of the box door 1, and the slotted section is a horizontal U-shaped structure. , forming a U-shaped slot plate, and the hook is a C-shaped locking plate whose opening direction is opposite to the opening direction of the U-shaped slot plate. Move, so that the limit hooks the slot plate, and the box door cannot be opened; when the swing arm rotates downward to open the gate, it drives the hook to leave the slot plate downward, and the box door can be opened.

The clamping plate can also be set as an L-shaped plate, and a pair of mounting ears protruding backwards are arranged on both sides of the top of the clamping plate. The part between the external return springs 13, the return spring 13 selects a cylindrical helical torsion spring; the initial position of the clamp is set to a vertical position, the return spring stores energy when the top plate pushes the clamp to rotate, the door is opened, and when the top plate leaves the clamp, The clamping plate is reset to the vertical position under the action of the elastic restoring force of the returning spring.

The middle part of the swing arm is hingedly installed on the side plate of the box body, and a vertical interlocking plate 9 is hingedly connected to the rear end of the swing arm. Designed pull rod 8, the upper end of the pull rod 8 passes through the waist hole, and the lower end is fixedly connected to the main shaft 7 of the on-off operating mechanism of the bus contact extending backward in the horizontal direction; when the swing arm rotates upward to close the switch, it drives the interlock The plate 9 moves downward, and the main shaft 7 of the on-off operating mechanism of the bus contact is driven by the pull rod 8 to rotate and lock the bus contact, so that the distribution box cannot be pulled out when the power is on, so as to avoid personal injury caused by plugging and unplugging under load; the swing arm When the gate is rotated downward, the main shaft 7 of the bus contact on-off operating mechanism is driven by the pull rod 8 to rotate and unlock, so that the power distribution box can be plugged in and out;

The upper end of the interlocking plate 9 is hingedly connected to the rear end of the swing arm, and a long waist hole is set at the lower end to form a guide hole. The bolt or guide rod runs through the guide hole, and the lower end of the interlocking plate is positioned on the side plate or the middle partition of the box through the guide rod. It is also possible to set a limit bolt near the upper part of the interlocking plate to ensure the stable movement of the interlocking plate.

Furthermore, the top plate is an L-shaped plate, and the front end of the top plate is fixedly connected to the inner surface of the box door through a fixing plate, which has high strength and reliable action.

Furthermore, one end of the main shaft of the on-off operating mechanism of the bus contact is hingedly mounted on the middle partition of the box through the mounting seat, and the other end protrudes out of the box through the connection window of the bus contact, and the limit is reliable.

In the multifunctional interlocking mechanism of the plug-in distribution box of the present invention, when the box door is opened, the clamping plate is located in the vertical position, which restricts the upward rotation of the swing arm, and cannot push the switch of the molded case circuit breaker to close, and passes through the top plate when the box door is closed. Push the card plate to rotate away from the limit position in the vertical direction, the swing arm can rotate upwards to push the switch of the molded case circuit breaker to close, and at the same time drive the main shaft of the bus contact on-off operating mechanism to In the pull-out state; during the closing process, the hook rotates upwards with the swing arm and inserts to the matching limit of the slot plate, and the box door cannot be opened; one operation can simultaneously complete the opening and closing interlocking of the box door switch and the molded case circuit breaker, and the box cabinet The double interlocking function of the door switch and the bus power supply is simple and compact in structure, easy to operate, small in size, safe and reliable.

1. The equipment is designed through the fool-proof mechanism, and can only be inserted into the busbar system when the molded case circuit breaker is off, and locked, so as to avoid potential safety hazards caused by power connection with load;

2. The operating shaft rotates forward, and the interlock pulls the switch of the molded case circuit breaker to close; the double interlock device is mechanically driven during the closing operation: (1) The box body and the box door are locked, and the power distribution box is powered on The door cannot be opened under the condition that the operator cannot touch the electrified body to ensure personal safety; (2) Realize the interlocking of the power-taking equipment (distribution box) and the bus device (power supply body), and cannot be pulled out when the power is on Distribution box, to avoid personal injury caused by plugging and unplugging under load;

3. The operating shaft rotates in the opposite direction, breaking, and interlocking to pull the switch of the molded case circuit breaker to open. At the same time, all the above interlocking functions are immediately released. Access to the inside of the electrical box can also be safely removed (pulled out) at any time.

Specific technical solutions:

A pluggable double interlocking distribution box for a busbar system;

In order to ensure the safety of equipment power consumption, when the distribution box takes power from the bus unit, it must ensure that: 1. The operator closes the circuit breaker (or other components) when the cabinet door is closed; 2. Takes power Units cannot be plugged and unplugged under load. However, the products currently on the market are two relatively independent interlocking devices, which need to be operated twice, and the above functions are realized through a certain operation sequence. During the implementation process, the operation steps completed by the operators are too cumbersome, and the interlock release is too mechanical (special tools are required to complete).

Purpose:

(1) The plug-in mobile power system is conveniently connected to the busbar system, and the interlock can greatly increase the safety;

(2) Realize one-time operation, double interlocking, and the operation steps are simpler.

Main technical solutions of interlocking distribution box:

1. The equipment is designed through the fool-proof mechanism. It can only be inserted into the busbar system and locked when the circuit breaker is off, so as to avoid potential safety hazards caused by power connection with load;

2. Turn the operating handle of the circuit breaker into a rotary closing operation, and use a set of special "double interlocking mechanical device" to convert the circular working trajectory formed by the side rotation operation into a translational movement trajectory in the front up and down direction, and toggle the circuit breaker operation lever, the circuit breaker is closed successfully;

3. The interlocking device is mechanically driven during the closing operation: (1) It can realize the locking of the box body and the box door, so that the box door cannot be opened when the distribution box is powered on, and the operator cannot touch the charged body. Ensure personal safety; (2) It can realize the interlocking of the power-taking equipment (distribution box) and the bus device (power supply body), so that the distribution box cannot be pulled out when the power is on, that is, to avoid damage caused by pulling out with load. personal injury.

4. Rotate the operating handle of the circuit breaker in the reverse direction, pull the operating lever of the circuit breaker according to the above principle, the circuit breaker is successfully opened, and at the same time all the above-mentioned interlocking functions are released immediately. The interior of the distribution box can be inspected and repaired under safe conditions, and the distribution box can also be safely removed (pulled out) at any time.

Prior art: the two interlocking mechanisms are relatively independent, and the interlocking relationship can only be realized through step-by-step operations.

This invention: Completely subverts the existing structural design, which belongs to a different interlocking concept. This invention can realize double interlocking with only one operation, and the interlocking performance is reliable. It is easy to operate for operators, easy to use, maintain and repair Very safe and so on.

Claims (10)

1. A plug-in type distribution box multifunctional interlocking mechanism, characterized in that: it includes a plug-in type distribution box box, and a molded case circuit breaker is fixedly installed inside the box through a vertical partition, and the box body The front side is equipped with a box door that can be rotated and opened, and the rear of the box is equipped with busbar contacts; the side panel of the box is hinged and installed with a swing arm that can push the switch of the molded case circuit breaker to open and close the box. The side plate of the body is located above the front end of the swing arm and is hingedly installed with a clamping plate, and the inner side of the box door is fixedly installed with the corresponding position of the clamping plate. A top plate that can push the clamping plate to rotate around the hinge point; A hook is installed, and a groove plate that can cooperate with the hook to limit the position is fixed on the inner side of the box door; the middle part of the swing arm is hingedly mounted on the side plate of the box body, and the rear end is hingedly connected with The interlocking plate is provided with a waist round hole in the middle of the interlocking plate, and a pull-out rod installed obliquely runs through the waist round hole. The lower end of the pull-out rod is connected with a busbar contact on-off operating mechanism extending backward in the horizontal direction. spindle. 2. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 1, characterized in that: the front end of the swing arm is fixedly connected with a cross bar, the middle part of the cross bar is provided with a switch hole, and the upper and lower sides of the switch hole are respectively fixed. An L-shaped switch tab is attached. 3. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 1, characterized in that: the front section of the swing arm is provided with a pin shaft, and a cam plate is hingedly installed in the space between the swing arm and the side plate of the box body An operating shaft is fixedly connected to the cam plate, and the operating end of the operating shaft passes through the side plate of the box body and protrudes to the outside of the box body. 4. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 3, wherein the cam plate is a fan-shaped plate, and the central angle corresponding to the fan-shaped plate is 90°. 5. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 3, wherein the operating shaft is a square shaft. 6. The multi-functional interlocking mechanism of the plug-in distribution box according to claim 1, characterized in that: a pair of mounting ears protruding backward are provided on both sides of the top of the clamping plate, and the pair of mounting ears are hingedly mounted by bolts On the side plate of the box body, the part of the bolt located between the pair of mounting ears is fitted with a return spring. 7. The multi-functional interlocking mechanism of the plug-in distribution box according to claim 6, wherein the return spring is a cylindrical helical torsion spring. 8. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 1, characterized in that: the cross-section of the slot plate is a horizontal U-shaped structure, forming a U-shaped slot plate, and the hook is in the direction of the opening and U-shaped The opening directions of the slot plates are C-shaped locking pieces opposite to each other. 9. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 1, wherein the top plate is an L-shaped plate, and the front end of the top plate is fixedly connected to the inner side of the box door through a fixing plate. 10. The multifunctional interlocking mechanism of the plug-in distribution box according to claim 1, characterized in that: the rear side panel of the box body is provided with a bus contact connection window, and one end of the main shaft of the bus contact on-off operating mechanism passes through The installation seat is hingedly installed on the middle partition of the box body, and the other end protrudes out of the box body through the connection window of the bus contact.