CN106711832B - Valve opening and locking device for switch cabinet - Google Patents

Abstract

The invention discloses a switch cabinet valve opening and locking device which comprises wheels arranged on a chassis, wherein an installation cylinder is fixedly arranged at the rear end of the chassis, a rotating handle is arranged at the tail end of the installation cylinder, a positioning pin which is driven by the rotating handle through a driving device and is inserted into a positioning hole of a switch cabinet is arranged on the installation cylinder, a control cylinder is fixedly arranged in the middle of the installation cylinder, and a rotating device which is driven by a rotating handle control magnetic block to rotate is arranged in the control cylinder. The locking mechanism has the advantages of reasonable structure, reliable and firm locking, simple unlocking, strong applicability, high universality and convenient operation, and can be suitable for switch cabinets of different specifications.

Description

Switch cabinet door opening locking device

technical field

The invention relates to an opening and locking device for a shutter of a switch cabinet.

Background technique

With the continuous development of power equipment technology, 10kV mid-mounted switchgear is widely used in new construction, expansion and reconstruction of substations due to its compact structure, small footprint and convenient operation.

The daily maintenance and repair work of the switchgear, when it is necessary to enter the circuit breaker room of the switchgear for inspection work (such as dust removal and replacement of the static contact box on the bus side and line side), the handcart operation of the circuit breaker, hot standby, cold standby, maintenance State switching operation, as well as bus phase nuclear phase, power inspection and grounding work, it is necessary to open the static contact isolation baffle in the switchgear circuit breaker room.

The commonly used device for opening the static contact isolation baffle of the switchgear circuit breaker is the valve-driven handcart. Most of them are valve-driven handcarts used with circuit breaker handcarts. Each substation is equipped with a variety of driving handcarts for use in switch cabinets with different cabinet widths.

At present, there are several or even dozens of different types of switch cabinets in substations under the jurisdiction of power supply companies. Various switch cabinets need to be equipped with various valve handcarts for daily maintenance and repair work, which causes a lot of inconvenience to the operation and maintenance personnel. When the handcart is insufficient or the handcart is not suitable for the maintenance switchgear, and the maintenance work of the opening valve in the switchgear circuit breaker room is required, the maintenance personnel cannot carry out the maintenance work normally.

It is very important to develop a kind of valve opening device with strong versatility, strong operability and high reliability that can open various types of door openings, which is very important to solve the problems of many switchgear manufacturers, different forms of valve drive vehicles and insufficient versatility. practical application value.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a switch cabinet shutter opening lock with reasonable structure, reliable and firm locking, simple unlocking, suitable for switch cabinets of different specifications, strong applicability, high versatility and convenient operation, aiming at the above shortcomings. tighten the device.

In order to solve the above technical problems, the structural features of the switch cabinet shutter opening and locking device are as follows: including wheels installed on the chassis, a mounting cylinder is fixed at the rear end of the chassis, a turning handle is installed at the end of the mounting cylinder, and the mounting cylinder is provided with a The turning handle drives the positioning pin inserted into the positioning hole of the switch cabinet through the driving device, a control cylinder is fixed in the middle of the installation cylinder, and a rotating device is arranged in the control cylinder to control the rotation of the magnetic block by the turning handle.

The switch cabinet shutter opening and locking device is a push-pull multiple locking structure to achieve reasonable structure, reliable and firm locking, and simple unlocking. It can be applied to switch cabinets of different specifications, with strong applicability, high versatility and convenient operation.

The push-pull multi-locking structure mainly includes wheels arranged at the bottom of the chassis and a locking device arranged at the rear end of the chassis, wherein the locking device mainly includes a positioning pin controlled by the turning handle and a magnetic block controlled by the turning handle. For the convenience of description, the direction in which the chassis is pushed horizontally into the switchgear (electric control cabinet) is called front, the opposite direction is called rear, the top of the chassis is called up, the bottom of the chassis is called down, and the two sides are called left and right respectively. The chassis is supported by wheels mounted on its lower part, so it can carry heavy loads and move back and forth. When the present invention is in use, two sets are required to be used together, one set is located on the left and the other is located on the right, so that it can not only play the role of stably supporting the front and rear movement of the trolley, but also adapt to the pushing of trolleys of switch cabinets of different specifications. stronger. When the trolley is pushed into the switch cabinet using the present invention, the chassis and the switch cabinet need to be locked together with a locking device to ensure the reliable cooperation between the trolley and the switch cabinet. For the convenience of description, this state is called the push state. In the present invention, the locking device mainly includes a positioning pin controlled by the turning handle and a magnetic block controlled by the turning handle, wherein the turning handle and the positioning pin are both installed on the mounting cylinder at the rear end of the chassis, and the magnetic block is arranged on the mounting cylinder fixed on the inside the control barrel on the barrel. In the push-in state, the positioning pins on the installation barrel correspond to the positioning holes on the switch cabinet. When the handle is turned, the handle will drive the positioning pin to move outward, so that the positioning pin can be pushed into the positioning hole, which also plays the role of limiting the positioning pin and the positioning hole in the front and rear directions, that is To the role of positioning the chassis front and rear. It is one of the positioning methods of the present invention to position the chassis through the turning handle and the positioning pin. The second positioning method of the present invention is a magnet block driven by a turning handle, the magnet block is installed in a control cylinder, and a rotating device arranged between the magnet block and the turning handle is also installed in the control cylinder. In the push-in state, by turning the handle, the magnet block can be driven to rotate by the rotating device. As we all know, there are magnetic lines of force distributed around the magnet block, that is, the magnetic field. When the ferromagnetic material is close to the magnetic field, it will receive the magnetic attraction force of the magnet block, and the magnetic attraction force will disappear when it is far away from the magnetic field. In power systems, switch cabinets are generally made of cold-rolled steel or galvanized steel, so they can be attracted by magnets. In the push-in state, when the handle is rotated, the handle will drive the magnet block to rotate through the rotating device, that is, drive the NS pole of the magnet block to rotate. When the magnetic field of the magnet block is close to the side wall or bottom plate of the switch cabinet, the magnet block and the switch cabinet will be adsorbed together, that is, it will play the role of magnetic locking. When the magnetic field of the magnetic block is kept away from the side plate or bottom plate of the switch cabinet, the adsorption force of the magnetic block and the switch cabinet is weakened or disappeared, which plays the role of unlocking the magnetic lock. To sum up, the present invention includes two locking mechanisms, namely the mechanical locking structure of the turning handle to drive the positioning pin and the magnetic locking structure of the turning handle to drive the magnetic block, under the double locking action of these two locking mechanisms , which can effectively avoid the phenomenon of loose locking and slippage caused by vibration and other factors, and ensure the reliability and convenience of electric power maintenance and maintenance of the switchgear.

As an implementation manner, the rotating device includes a rotating cylinder arranged in the installation cylinder, two ends of the rotating cylinder are coaxially fixed with a rotating shaft that is rotatably matched with the installation cylinder, the rotating handle is coaxially connected to one of the rotating shafts, and the rotating cylinder is There is a magnetic block cavity for clamping the magnetic block, and the NS poles of the magnetic block are respectively located on both sides of the rotating shaft.

In the present invention, the rotating device mainly includes a rotating cylinder arranged in the installation cylinder and a magnet block cavity set in the rotating cylinder, wherein two coaxially arranged rotating shafts are fixed at both ends of the rotating cylinder, and the rotating cylinder passes through the rotating cylinder. The shaft is rotatably installed in the installation barrel. The rotating handle is fixedly connected with one of the rotating shafts, so that the rotating handle forms an integral structure with the rotating shaft and the rotating drum. When the handle is turned, the handle will drive the drum to rotate through the rotating shaft. The rotating drum is provided with a magnet block cavity matched with the magnet block. After the magnet block is clamped in the magnet block cavity, the N pole and the S pole of the magnet block are respectively located on both sides of the rotating shaft. The purpose of this setting is to make the magnetic block rotate, so that its two poles can be close to the side wall or bottom plate of the switch cabinet at intervals, even if its magnetic field can be close to the side wall or bottom plate of the switch cabinet, that is, a magnetic lock is generated on the side wall of the switch cabinet. tight effect.

As an improvement, downward extending magnetic conductive blocks are installed in the control cylinder, two magnetic conductive blocks are located on both sides of the rotating cylinder, and a lifting device is also installed in the control cylinder to drive the magnetic conductive blocks to move up and down by the turning handle.

In the present invention, a magnetic conductive block is also arranged in the control cylinder, and the magnetic conductive block is made of a ferromagnetic material that can be magnetically adsorbed by the magnetic block, and generally a silicon steel sheet with strong magnetic conductivity is used. The number of magnetic conductive blocks is two, which are located on both sides of the drum. The control cylinder is also provided with a lifting device that drives the magnetic conductive block to move up and down, and the lifting device is controlled by the handle. When the handle is rotated, the handle will control the lifting and lowering of the magnetic conductive block through the lifting device. In the push-in state, after turning the handle, the handle not only rotates the magnetic block through the rotating device to achieve the purpose of the magnetic field of the magnetic block being close to the side wall or bottom plate of the switch cabinet, but also moves the magnetic conductive block downward through the lifting device. Approach the switchgear bottom plate. Due to the magnetic permeability of the magnetic block, the magnetic field lines emitted by the magnetic block will be preferentially distributed through the magnetic block, so the magnetic block plays the role of concentrating and extending the magnetic field lines of the magnetic block to the bottom plate of the switch cabinet, that is, extending the magnetic block. The effect of magnetic adsorption distance and strength makes the magnetic block tightly adhere to the bottom plate of the switch cabinet through the magnetic conductive block, which also plays the role of strong magnetic locking. For the convenience of description, this state is called the magnetic attraction state.

As an improvement, when the NS poles of the turning handle drive the magnet block are set left and right, the turning handle also drives the magnetic guide block to move down to the lower stroke limit point synchronously, and when the NS pole of the turning handle drives the magnet block is set up and down Move up to the upper stroke limit.

When the NS poles of the magnetic block are arranged left and right, the magnetic block itself and the magnetic conductive blocks on both sides just form a magnetic extension block with an n-shaped structure. In the magnetic attraction state, the magnetic conductive block moves down to the lower stroke limit point, so that the lower end of the magnetic extension block just fits closely with the bottom plate of the switchgear, so that the n-shaped magnetic extension block is connected to the bottom plate of the switchgear (cold). Rolled steel or galvanized steel) constitutes a magnetic extension block of an o-shaped structure. Since the magnetic extension block of the o-shaped structure is a closed-loop structure, it just provides a complete path for the magnetic field lines of the magnetic block, so the magnetic force of the magnetic block adsorbing the bottom plate of the switch cabinet reaches the strongest state at this time. For the convenience of description, this state is called the strongest magnetic attraction state. On the contrary, when the NS pole of the turning handle drives the magnetic block up and down, the turning handle also synchronously drives the magnetic conductive block to move upward to the upper stroke limit point, so that the lower end of the magnetic extension block is the farthest from the switchgear bottom plate. At this time, the magnetic block forms a magnetic circuit away from the bottom plate of the switch cabinet through the magnetic conductive blocks on both sides, so the magnetic attraction force to the bottom plate of the switch cabinet is the weakest, and this state is called the weakest magnetic attraction state. By turning the handle, the present invention can be controlled to switch between the strongest magnetic attraction state and the weakest magnetic attraction state, that is, to switch between magnetic locking and unlocking, and the operation is very simple.

As an implementation manner, the lifting device includes a gear fixed on the outer circumference of the drum, a vertically arranged rack meshing with the gear is installed on a magnetic conductive block, and the upper ends of the two magnetic conductive blocks are fixedly connected by a non-magnetic connecting plate Together, the lower parts of the two magnetic conductive blocks are provided with extension blocks extending oppositely. When the gear rotates to the lower end of the rack, the lower part of the gear cooperates with the lower limit of the extension block, and when the gear rotates to the upper end of the rack, the gear cooperates with the upper limit of the connecting plate.

In the present invention, the lifting device mainly includes gears and racks that are meshed together, wherein the gears are fixed on the outer circumference of the drum, and the racks are fixed on the inner side of a magnetic conductive block, so when the handle drives the drum to rotate, the gears The magnetic conductive block will be driven to move up and down synchronously through the rack, so that the function of the synchronous action of the rotary handle to drive the magnetic block and the magnetic conductive block is realized. In this lifting device, the upper ends of the two magnetic conductive blocks are fixed together by a connecting plate, and the connecting plate is made of non-magnetic material, so it does not guide the magnetic field lines of the magnetic blocks, but can play a role in the two magnetic conductive blocks. To the linkage effect, this is the reason why only a rack meshing with the gear is provided inside one magnetic conductive block. The connecting plate has another function, that is, when the gear drives the magnetic conductive block to move downward, it can limit the gear when it reaches the strongest magnetic attraction state, so that the gear cannot continue to rotate upward relative to the rack, even if the guide The magnet block cannot move further down. The lower part of the two magnetic conductive blocks are provided with extension blocks extending opposite each other. In addition to guiding the magnetic field lines of the magnetic blocks, the extension blocks also have a lower limit for the gear when the gear drives the magnetic conductive block to move upward, that is, in the weakest magnetic attraction state. Even if the gear cannot continue to move downward relative to the rack, even if the magnetic conductive block cannot continue to move upward.

As an improvement, the lower part of the magnetic conductive block is a tapered shape with a thin bottom and a thick upper part that is inserted and matched with the positioning hole on the track, and the lower end surface of the magnetic conductive block is a plane.

The lower end of the magnetic guide block is set as a cone with a thin bottom and a thick upper part. When using it on the bottom plate of the switch cabinet with positioning holes, the lower end of the magnetic guide block can be inserted into the positioning hole of the bottom plate, so that the magnetic guide block not only has the function of magnetic locking There is also a mechanical locking function, the locking effect is better. The lower end surface of the magnetic conductive block is set as a flat surface, which is mainly used in the case where there is no positioning hole on the bottom plate of the switch cabinet. At this time, although the lower end of the magnetic conductive block cannot be inserted into the positioning hole of the bottom plate, the bottom surface of the magnetic conductive block will stick to the bottom plate of the switch cabinet, and it can still form a magnetic field line circuit with the bottom plate, which plays a strong magnetic locking effect and ensures the reliability of locking.

As an improvement, the front end of the chassis is fixed with a fixing plate, and the fixing plate is provided with an upper fixing hole row matched with the upper driving block and a lower fixing hole row matched with the lower driving block.

After the fixing plate is set at the front end of the chassis, the upper and lower valve drive blocks of the switchgear trolley can be fixedly installed with bolts through the upper and lower fixing holes on the fixing plate. Because the upper fixing hole row and the lower fixing hole row are both a row of fixing holes, the upper and lower valve drive blocks can be adjusted back and forth according to the model and size of the actual switchgear. When the shutter driving block drives the isolation baffle of the indoor static contacts of the switch cabinet circuit breaker, it can open the isolation baffle of the indoor static contacts of the circuit breaker in place while locking the chassis, which greatly improves the accuracy and versatility of the present invention.

As an implementation manner, the driving device includes a pendulum gear coaxially fixed on the rotating shaft, a pin hole is provided on the mounting cylinder, the locating pin is hinged in the pin hole through the pin shaft, and the locating pin includes a coaxially mounted pin hole. The semicircular plate on the pin shaft, the circumference of the semicircular plate is provided with semicircular teeth meshing with the pendulum gear, the semicircular plate is also fixed with main limit blocks corresponding to both ends of the semicircular tooth, and the pendulum gear is provided with the main limit The auxiliary limit block of the block extrusion limit match.

In the present invention, the driving device mainly includes a pendulum gear mounted on the rotating shaft and a positioning pin hinged in the pin hole, wherein the pendulum gear is coaxially fixed on the rotating shaft and is fixed to the rotating shaft to form an integral structure. Therefore, when rotating When the handle is rotated, the handle will drive the pendulum gear to rotate synchronously through the rotating shaft. The locating pin is hinged in the pin hole of the installation cylinder through the pin shaft. When the locating pin rotates around the pin shaft, it will swing into the pin hole or swing out of the pin hole. After the present invention is pushed into the switch cabinet, if the locating pin is swung out of the pin hole, it will be swung into the switch cabinet locating hole correspondingly, so that the locating pin is matched with the switch cabinet at the limit, which plays an important role in locking the present invention and the switch cabinet. effect. When the locating pin is swung into the pin hole around the pin shaft, the locating pin is also disengaged from the locating hole of the switch cabinet. At this time, the present invention will be unlocked with the switch cabinet, and the present invention can be pulled out of the switch cabinet. In the present invention, the positioning pin comprises a semicircular plate, the semicircular plate is coaxially mounted on the pin shaft, the circumference of the semicircular plate is provided with semicircular teeth, and the semicircular teeth mesh with the pendulum gear. In the present invention, although the pendulum gear is called a gear, only the part of the circumference that meshes with the semicircular teeth has teeth on its entire circumference, and the other circumferences are fixed with auxiliary limit blocks. For the convenience of description, the circular segment of the pendulum gear with teeth and the circular segment of the semicircular plate with semicircular teeth are called the tooth segment. Therefore, the pendulum gear and the semicircular plate can only be meshed within a certain angle range, that is, the pendulum gear can only drive the semicircular plate to swing within a certain angle range, that is, the handle can only drive the positioning pin to swing within a certain angle range. There are main limit blocks fixed on the semicircular plate, and the number of the main limit blocks is two, which are respectively set corresponding to the two ends of the semicircular teeth. The auxiliary limit blocks on the pendulum gear are also arranged at both ends of the tooth segment of the pendulum gear, and the auxiliary limit blocks are correspondingly arranged with the main limit blocks. The purpose of this setting is that when the meshing part of the pendulum gear and the semicircular plate moves to the end of the tooth segment, the main limit block on the semicircle plate will be squeezed together with the auxiliary limit block on the pendulum gear and cannot continue to rotate. It plays the role of limiting the position at the end of the tooth segment, and also plays the role of making the pendulum gear and the semicircular plate only mesh and drive in the tooth segment. In the present invention, when the meshing part of the pendulum gear and the semicircular plate is located at the starting end of the tooth segment, the semicircular plate is completely swung into the pin hole, that is, the positioning pin is completely swung into the pin hole, and the positioning pin is exposed to the length of the pin hole at this time. The shortest, called the pendulum state or unlocked state. When the meshing part of the pendulum gear and the semicircular plate moves from the starting end of the tooth segment to the ending end of the tooth segment, the semicircular plate will gradually swing out of the pin hole, that is, the locating pin will gradually swing out of the pin hole, and the locating pin will expose the pin hole at this time. length is getting longer. When the meshing part of the pendulum gear and the semicircular plate is located at the end of the tooth segment, the semicircular plate completely swings out of the pin hole, that is, the positioning pin completely swings out of the pin hole. At this time, the length of the positioning pin exposed from the pin hole is the longest, which is called swing out state or locked state. By swinging the handle from the starting position to the ending position, the positioning pin can be controlled to switch from the swing-in state to the swing-out state, that is, from the unlocked state to the locked state. Similarly, by swinging the handle from the end position to the start position, the positioning pin can be controlled to switch from the swing out state to the swing in state, that is, from the locked state to the unlocked state, and the operation is very simple.

As an improvement, the turning handle drives the locating pin out of the pin hole and drives the magnet block to the position with the strongest magnetic attraction to the switchgear, while the rotating handle drives the locating pin into the pin hole and drives the magnet block to rotate to the position with the strongest magnetic attraction to the switchgear weakest position.

In the present invention, when the handle swings from the starting position to the end position, the handle is switched from the swinging state to the swinging state, that is, from the unlocked state to the locked state, through the rotating shaft and the swing gear to drive the positioning pin. At the same time, the rotating shaft also swings the magnetic block to the state set on the left and right sides of the NS pole through the rotating drum. At this time, the gear on the rotating drum also drives the magnetic conductive block to move down to the lower travel limit point synchronously, that is, the track positioning inserted into the switch cabinet. In this way, the magnetic block can achieve the strongest magnetic attraction to the bottom plate of the switch cabinet through the magnetic conductive block. At this time, the present invention has three locking states, namely: the side locking between the positioning pin and the positioning hole of the switch cabinet, the bottom locking between the magnetic conductive block and the track positioning hole of the switch cabinet, the magnetic block and the magnetic conductive block and the switch cabinet track (bottom plate). ) of the lock. Therefore, the present invention realizes three kinds of locking with the switch cabinet through the swinging action of one turning handle, effectively ensuring the reliability of the locking, and the operation is very simple. When it needs to be unlocked, just turn the handle in the opposite direction to the starting position, and then the positioning pin can be driven into the pin hole through the rotating shaft and the swing gear, and the magnetic block can be pulled out of the track positioning hole through the rotating shaft and the rotating drum. The rotating drum sets the NS pole of the magnet block up and down so that the magnet block reaches the weakest magnetic attraction state to the bottom plate of the switch cabinet, that is, the three locks are unlocked synchronously, so the unlocking is also very simple. It should be noted that due to the magnetic attraction of the magnetic block, it has a self-locking function whether it is locked or unlocked, that is, it will not switch between unlocked and locked states at will due to device vibration or touch, ensuring that Work reliability.

To sum up, the advantages and beneficial effects of the present invention are:

(1) Two positioning locking methods are provided: the mechanical locking of the handle drive positioning pin and the magnetic locking of the handle drive magnet block. The innovative design of the handle drive magnet block generates sufficient magnetic force through the handle magnet block. Adhere tightly to the inner rail of the switch cabinet door to ensure the device is firmly locked.

(2) Removable upper and lower valve drive blocks. The fixed hole row on the drive block can adjust the upper and lower valve drive blocks forward and backward according to the actual switchgear model and size, so as to realize the circuit in the switchgear. The side and bus side isolation baffles are opened to work, and the disassembly and assembly are flexible and easy to use.

(3) Two sets of the device are used together, which can adapt to switch cabinets of different specifications, and is not limited by the width of the cabinet, and has strong versatility.

Description of drawings

The present invention is described in further detail in conjunction with the accompanying drawings:

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

Fig. 2 is the distribution diagram of magnetic field lines in the weakest magnetic attraction state;

Fig. 3 is the distribution diagram of magnetic field lines in the strongest magnetic attraction state;

4 is a schematic diagram of the matching structure of each component in the control cylinder and the positioning hole in the weakest magnetic attraction state;

5 is a schematic diagram of the matching structure of each component in the control cylinder and the positioning hole in the strongest magnetic attraction state;

FIG. 6 is a schematic structural diagram of the present invention in a state of being placed;

FIG. 7 is a schematic structural diagram of the present invention in a laid-out state;

Figure 8 is a state diagram of the present invention when the switchgear is just pushed into the switchgear along the track;

Fig. 9 is the state diagram when the present invention just touches the isolation baffle drive wheel;

FIG. 10 is a state diagram of the present invention when the isolation baffle drive wheel is pushed to open the isolation baffle and locked with the positioning hole.

Detailed ways

As shown in Figure 1, the switch cabinet shutter opening and locking device includes a wheel 2 mounted on a chassis 1, a mounting cylinder 3 is fixed at the rear end of the chassis, a turning handle 4 is installed at the end of the mounting cylinder, and a rotating handle 4 is installed on the mounting cylinder. Drive the positioning pin 5 inserted into the positioning hole of the switch cabinet through the driving device. A control cylinder 6 is fixed in the middle of the installation cylinder, and a rotating device for controlling the rotation of the magnet block 8 by the turning handle is arranged in the control cylinder. The switch cabinet shutter opening and locking device mainly includes wheels arranged at the bottom of the chassis and a locking device arranged at the rear end of the chassis, wherein the locking device mainly includes a positioning pin controlled by the turning handle and a magnetic block controlled by the turning handle. For the convenience of description, the direction in which the chassis is pushed horizontally into the switchgear (electric control cabinet) is called front, the opposite direction is called rear, the top of the chassis is called up, the bottom of the chassis is called down, and the two sides are called left and right respectively. The chassis is supported by wheels mounted on its lower part, so it can carry heavy loads and move back and forth. When the present invention is in use, two sets are required to be used together, one set is located on the left and the other is located on the right, so that it can not only play the role of stably supporting the front and rear movement of the trolley, but also adapt to the pushing of trolleys of switch cabinets of different specifications. stronger. When the trolley is pushed into the switch cabinet using the present invention, the chassis and the switch cabinet need to be locked together with a locking device to ensure the reliable cooperation between the trolley and the switch cabinet. For the convenience of description, this state is called the push state. In the present invention, the locking device mainly includes a positioning pin controlled by the turning handle and a magnetic block controlled by the turning handle, wherein the turning handle, the positioning pin and the turning handle are all installed on the mounting cylinder at the rear end of the chassis, and the magnetic block is arranged on the fixed Set in the control cylinder on the installation cylinder. In the push-in state, the positioning pins on the installation barrel correspond to the positioning holes on the switch cabinet. When the handle is turned, the handle will drive the positioning pin to move outward, so that the positioning pin can be pushed into the positioning hole, which also plays the role of limiting the positioning pin and the positioning hole in the front and rear directions, that is To the role of positioning the chassis front and rear. It is one of the positioning methods of the present invention to position the chassis through the turning handle and the positioning pin. The second positioning method of the present invention is a magnet block driven by a turning handle, the magnet block is installed in a control cylinder, and a rotating device arranged between the magnet block and the turning handle is also installed in the control cylinder. In the push-in state, by turning the handle, the magnet block can be driven to rotate by the rotating device. As we all know, there are magnetic lines of force distributed around the magnet block, that is, the magnetic field. When the ferromagnetic material is close to the magnetic field, it will receive the magnetic attraction force of the magnet block, and the magnetic attraction force will disappear when it is far away from the magnetic field. In power systems, switch cabinets are generally made of cold-rolled steel or galvanized steel, so they can be attracted by magnets. In the push-in state, when the handle is rotated, the handle will drive the magnet block to rotate through the rotating device, that is, drive the NS pole of the magnet block to rotate. When the magnetic field of the magnet block is close to the side wall or bottom plate of the switch cabinet, the magnet block and the switch cabinet will be adsorbed together, that is, it will play the role of magnetic locking. When the magnetic field of the magnetic block is kept away from the side plate or bottom plate of the switch cabinet, the adsorption force of the magnetic block and the switch cabinet is weakened or disappeared, which plays the role of unlocking the magnetic lock. To sum up, the present invention includes two locking mechanisms, namely the mechanical locking structure of the turning handle to drive the positioning pin and the magnetic locking structure of the turning handle to drive the magnetic block, under the double locking action of these two locking mechanisms , which can effectively avoid the phenomenon of loose locking and slippage caused by vibration and other factors, and ensure the reliability and convenience of electric power maintenance and maintenance of the switchgear.

In this embodiment, the rotating device includes a rotating cylinder 10 arranged in the installation cylinder. The two ends of the rotating cylinder are coaxially fixed with a rotating shaft 11 which is rotatably matched with the installation cylinder. The rotating handle is coaxially connected to one of the rotating shafts. A magnet block cavity 12 for clamping magnet blocks is arranged in the cylinder, and the NS poles of the magnet blocks are respectively located on both sides of the rotating shaft.

In the present invention, the rotating device mainly includes a rotating cylinder arranged in the installation cylinder and a magnet block cavity set in the rotating cylinder, wherein two coaxially arranged rotating shafts are fixed at both ends of the rotating cylinder, and the rotating cylinder passes through the rotating cylinder. The shaft is rotatably installed in the installation barrel. The rotating handle is fixedly connected with one of the rotating shafts, so that the rotating handle forms an integral structure with the rotating shaft and the rotating drum. When the handle is turned, the handle will drive the drum to rotate through the rotating shaft. The rotating drum is provided with a magnet block cavity matched with the magnet block. After the magnet block is clamped in the magnet block cavity, the N pole and the S pole of the magnet block are respectively located on both sides of the rotating shaft. The purpose of this setting is to make the magnetic block rotate, so that its two poles can be close to the side wall or bottom plate of the switch cabinet at intervals, even if its magnetic field can be close to the side wall or bottom plate of the switch cabinet, that is, a magnetic lock is generated on the side wall of the switch cabinet. tight effect.

In the present invention, the magnetic conductive blocks 9 extending downward are installed in the control cylinder, and the magnetic conductive blocks are two located on both sides of the rotating cylinder. Lifting device. A magnetic conductive block is also arranged in the control cylinder. The magnetic conductive block is made of a ferromagnetic material that can be magnetically adsorbed by the magnetic block, and generally a silicon steel sheet with strong magnetic conductivity is used. The number of magnetic conductive blocks is two, which are located on both sides of the drum. The control cylinder is also provided with a lifting device that drives the magnetic conductive block to move up and down, and the lifting device is controlled by the handle. When the handle is rotated, the handle will control the lifting and lowering of the magnetic conductive block through the lifting device. In the push-in state, after turning the handle, the handle not only rotates the magnetic block through the rotating device to achieve the purpose of the magnetic field of the magnetic block being close to the side wall or bottom plate of the switch cabinet, but also moves the magnetic conductive block downward through the lifting device. Approach the switchgear bottom plate. Due to the magnetic permeability of the magnetic block, the magnetic field lines emitted by the magnetic block will be preferentially distributed through the magnetic block, so the magnetic block plays the role of concentrating and extending the magnetic field lines of the magnetic block to the bottom plate of the switch cabinet, that is, extending the magnetic block. The effect of magnetic adsorption distance and strength makes the magnetic block tightly adhere to the bottom plate of the switch cabinet through the magnetic conductive block, which also plays the role of strong magnetic locking. For the convenience of description, this state is called the magnetic attraction state.

In this embodiment, when the NS poles of the turning handle driving the magnetic block are set left and right, the turning handle also drives the magnetic conductive block to move down to the lower stroke limit point synchronously, and when the NS poles of the turning handle driving magnet block are set up and down The magnetic block moves up to the upper stroke limit point. When the NS poles of the magnetic block are arranged left and right, the magnetic block itself and the magnetic conductive blocks on both sides just form a magnetic extension block with an n-shaped structure. In the magnetic attraction state, the magnetic conductive block moves down to the lower stroke limit point, so that the lower end of the magnetic extension block just fits closely with the bottom plate of the switchgear, so that the n-shaped magnetic extension block is connected to the bottom plate of the switchgear (cold). Rolled steel or galvanized steel) constitutes a magnetic extension block of an o-shaped structure. Since the magnetic extension block of the o-shaped structure is a closed-loop structure, it just provides a complete path for the magnetic field lines of the magnetic block, so the magnetic force of the magnetic block adsorbing the bottom plate of the switch cabinet reaches the strongest state at this time. For the convenience of description, this state is called the strongest magnetic attraction state. On the contrary, when the NS pole of the turning handle drives the magnetic block up and down, the turning handle also synchronously drives the magnetic conductive block to move upward to the upper stroke limit point, so that the lower end of the magnetic extension block is the farthest from the switchgear bottom plate. At this time, the magnetic block forms a magnetic circuit away from the bottom plate of the switch cabinet through the magnetic conductive blocks on both sides, so the magnetic attraction force to the bottom plate of the switch cabinet is the weakest, and this state is called the weakest magnetic attraction state. By turning the handle, the present invention can be controlled to switch between the strongest magnetic attraction state and the weakest magnetic attraction state, that is, to switch between magnetic locking and unlocking, and the operation is very simple.

In this embodiment, the lifting device includes a gear 13 fixed on the outer circumference of the rotating drum 10, a vertically arranged rack 14 meshing with the gear is mounted on a magnetic conductive block, and the upper ends of the two magnetic conductive blocks are connected through a non-magnetic connection. The plates 15 are fixed together, and the lower part of the two magnetic conductive blocks is provided with an extension block 16 extending oppositely. When the gear rotates to the lower end of the rack, the lower part of the gear cooperates with the lower limit of the extension block, and when the gear rotates to the upper end of the rack, the gear and the upper limit of the connecting plate Cooperate.

In the present invention, the lifting device mainly includes gears and racks that are meshed together, wherein the gears are fixed on the outer circumference of the drum, and the racks are fixed on the inner side of a magnetic conductive block, so when the handle drives the drum to rotate, the gears The magnetic conductive block will be driven to move up and down synchronously through the rack, so that the function of the synchronous action of the rotary handle to drive the magnetic block and the magnetic conductive block is realized. In this lifting device, the upper ends of the two magnetic conductive blocks are fixed together by a connecting plate, and the connecting plate is made of non-magnetic material, so it does not guide the magnetic field lines of the magnetic blocks, but can play a role in the two magnetic conductive blocks. To the linkage effect, this is the reason why only a rack meshing with the gear is provided inside one magnetic conductive block. The connecting plate has another function, that is, when the gear drives the magnetic conductive block to move downward, it can limit the gear when it reaches the strongest magnetic attraction state, so that the gear cannot continue to rotate upward relative to the rack, even if the guide The magnet block cannot move further down. The lower part of the two magnetic conductive blocks are provided with extension blocks extending opposite each other. In addition to guiding the magnetic field lines of the magnetic blocks, the extension blocks also have a lower limit for the gear when the gear drives the magnetic conductive block to move upward, that is, in the weakest magnetic attraction state. Even if the gear cannot continue to move downward relative to the rack, even if the magnetic conductive block cannot continue to move upward.

The lower part of the magnetic conductive block is a tapered shape with a thin bottom and a thick upper part that is inserted and matched with the positioning hole 17 on the track 21 , and the lower end surface of the magnetic conductive block is flat. The lower end of the magnetic guide block is set as a cone with a thin bottom and a thick upper part. When using it on the bottom plate of the switch cabinet with positioning holes, the lower end of the magnetic guide block can be inserted into the positioning hole of the bottom plate, so that the magnetic guide block not only has the function of magnetic locking There is also a mechanical locking function, the locking effect is better. The lower end surface of the magnetic conductive block is set as a flat surface, which is mainly used in the case where there is no positioning hole on the bottom plate of the switch cabinet. At this time, although the lower end of the magnetic conductive block cannot be inserted into the positioning hole of the bottom plate, the bottom surface of the magnetic conductive block will stick to the bottom plate of the switch cabinet, and it can still form a magnetic field line circuit with the bottom plate, which plays a strong magnetic locking effect and ensures the reliability of locking.

The front end of the chassis is fixed with a fixing plate 18, and the fixing plate is provided with an upper fixing hole row 19 matched with the upper driving block and a lower fixing hole row 20 matched with the lower driving block. After the fixing plate is set at the front end of the chassis, the upper and lower valve drive blocks of the switchgear trolley can be fixedly installed with bolts through the upper and lower fixing holes on the fixing plate. Because the upper fixing hole row and the lower fixing hole row are both a row of fixing holes, the upper and lower valve drive blocks can be adjusted back and forth according to the model and size of the actual switchgear. When the shutter drive block drives the switchgear circuit breaker indoor static contact isolation baffle (driven by the isolation baffle drive wheel 22), it can lock the chassis and simultaneously open the circuit breaker indoor static contact isolation baffle, which greatly improves the accuracy and versatility of the present invention.

In this embodiment, the driving device includes a pendulum gear 7 coaxially fixed on the rotating shaft, a pin hole 23 is provided on the mounting cylinder, and the positioning pin is hinged in the pin hole through the pin shaft 24, and the positioning pin includes the same The semicircular plate 25 with the shaft mounted on the pin shaft, the circumference of the semicircular plate is provided with semicircular teeth 26 meshing with the pendulum gear, and the semicircular plate is also fixed with main limit blocks 27 corresponding to both ends of the semicircular teeth, and the pendulum gear is fixed on the semicircular plate 25 A secondary limiting block 28 is provided for extruding and limiting cooperation with the main limiting block.

In the present invention, the driving device mainly includes a pendulum gear mounted on the rotating shaft and a positioning pin hinged in the pin hole, wherein the pendulum gear is coaxially fixed on the rotating shaft and is fixed to the rotating shaft to form an integral structure. Therefore, when rotating When the handle is rotated, the handle will drive the pendulum gear to rotate synchronously through the rotating shaft. The locating pin is hinged in the pin hole of the installation cylinder through the pin shaft. When the locating pin rotates around the pin shaft, it will swing into the pin hole or swing out of the pin hole. After the present invention is pushed into the switch cabinet, if the locating pin is swung out of the pin hole, it will be swung into the switch cabinet locating hole correspondingly, so that the locating pin is matched with the switch cabinet at the limit, which plays an important role in locking the present invention and the switch cabinet. effect. When the locating pin is swung into the pin hole around the pin shaft, the locating pin is also disengaged from the locating hole of the switch cabinet. At this time, the present invention will be unlocked with the switch cabinet, and the present invention can be pulled out of the switch cabinet. In the present invention, the positioning pin comprises a semicircular plate, the semicircular plate is coaxially mounted on the pin shaft, the circumference of the semicircular plate is provided with semicircular teeth, and the semicircular teeth mesh with the pendulum gear. In the present invention, although the pendulum gear is called a gear, only the part of the circumference that meshes with the semicircular teeth has teeth on its entire circumference, and the other circumferences are fixed with auxiliary limit blocks. For the convenience of description, the circular segment of the pendulum gear with teeth and the circular segment of the semicircular plate with semicircular teeth are called the tooth segment. Therefore, the pendulum gear and the semicircular plate can only be meshed within a certain angle range, that is, the pendulum gear can only drive the semicircular plate to swing within a certain angle range, that is, the handle can only drive the positioning pin to swing within a certain angle range. There are main limit blocks fixed on the semicircular plate, and the number of the main limit blocks is two, which are respectively set corresponding to the two ends of the semicircular teeth. The auxiliary limit blocks on the pendulum gear are also arranged at both ends of the tooth segment of the pendulum gear, and the auxiliary limit blocks are correspondingly arranged with the main limit blocks. The purpose of this setting is that when the meshing part of the pendulum gear and the semicircular plate moves to the end of the tooth segment, the main limit block on the semicircle plate will be squeezed together with the auxiliary limit block on the pendulum gear and cannot continue to rotate. It plays the role of limiting the position at the end of the tooth segment, and also plays the role of making the pendulum gear and the semicircular plate only mesh and drive in the tooth segment. In the present invention, when the meshing part of the pendulum gear and the semicircular plate is located at the starting end of the tooth segment, the semicircular plate is completely swung into the pin hole, that is, the positioning pin is completely swung into the pin hole, and the positioning pin is exposed to the length of the pin hole at this time. The shortest, called the pendulum state or unlocked state. When the meshing part of the pendulum gear and the semicircular plate moves from the starting end of the tooth segment to the ending end of the tooth segment, the semicircular plate will gradually swing out of the pin hole, that is, the locating pin will gradually swing out of the pin hole, and the locating pin will expose the pin hole at this time. length is getting longer. When the meshing part of the pendulum gear and the semicircular plate is located at the end of the tooth segment, the semicircular plate completely swings out of the pin hole, that is, the positioning pin completely swings out of the pin hole. At this time, the length of the positioning pin exposed from the pin hole is the longest, which is called swing out state or locked state. By swinging the handle from the starting position to the ending position, the positioning pin can be controlled to switch from the swing-in state to the swing-out state, that is, from the unlocked state to the locked state. Similarly, by swinging the handle from the end position to the start position, the positioning pin can be controlled to switch from the swing out state to the swing in state, that is, from the locked state to the unlocked state, and the operation is very simple.

When the handle 4 drives the positioning pin to swing out of the pin hole 23, it drives the magnetic block to rotate to the position with the strongest magnetic attraction to the switchgear. The position with the weakest suction. In the present invention, when the handle swings from the starting position to the end position, the handle is switched from the swinging state to the swinging state, that is, from the unlocked state to the locked state, through the rotating shaft and the swing gear to drive the positioning pin. At the same time, the rotating shaft also swings the magnetic block to the state set on the left and right sides of the NS pole through the rotating drum. At this time, the gear on the rotating drum also drives the magnetic conductive block to move down to the lower travel limit point synchronously, that is, the track positioning inserted into the switch cabinet. In this way, the magnetic block can achieve the strongest magnetic attraction to the bottom plate of the switch cabinet through the magnetic conductive block. At this time, the present invention has three locking states, namely: the side locking between the positioning pin and the positioning hole of the switch cabinet, the bottom locking between the magnetic conductive block and the track positioning hole of the switch cabinet, the magnetic block and the magnetic conductive block and the switch cabinet track (bottom plate). ) of the lock. Therefore, the present invention realizes three kinds of locking with the switch cabinet through the swinging action of one turning handle, effectively ensuring the reliability of the locking, and the operation is very simple. When it needs to be unlocked, just turn the handle in the opposite direction to the starting position, and then the positioning pin can be driven into the pin hole through the rotating shaft and the swing gear, and the magnetic block can be pulled out of the track positioning hole through the rotating shaft and the rotating drum. The rotating drum sets the NS pole of the magnet block up and down so that the magnet block reaches the weakest magnetic attraction state to the bottom plate of the switch cabinet, that is, the three locks are unlocked synchronously, so the unlocking is also very simple. It should be noted that due to the magnetic attraction of the magnetic block, it has a self-locking function whether it is locked or unlocked, that is, it will not switch between unlocked and locked states at will due to device vibration or touch, ensuring that Work reliability.

Claims (8)

1. The utility model provides a cubical switchboard valve opens locking device which characterized by: the wheel type switch cabinet is characterized by comprising wheels (2) arranged on a chassis (1), an installation barrel (3) is fixedly arranged at the rear end of the chassis (1), a rotating handle (4) is arranged at the tail end of the installation barrel (3), a positioning pin (5) which is driven by the rotating handle (4) through a driving device and inserted into a positioning hole of the switch cabinet is arranged on the installation barrel (3), a control barrel (6) is fixedly arranged in the middle of the installation barrel (3), and a rotating device which controls a magnetic block (8) to rotate through the rotating handle (4) is arranged in the control barrel (6); the driving device comprises a swing gear (7) coaxially fixedly arranged on a rotating shaft (11), a pin hole (23) is formed in an installation cylinder (3), a positioning pin (5) is hinged in the pin hole (23) through a pin shaft (24), the positioning pin (5) comprises a semicircular plate (25) coaxially arranged on the pin shaft (24), semicircular teeth (26) meshed with the swing gear (7) are arranged on the circumference of the semicircular plate (25), main limiting blocks (27) corresponding to the two ends of the semicircular teeth (26) are fixedly arranged on the semicircular plate (25), and auxiliary limiting blocks (28) which are in extrusion limiting fit with the main limiting blocks (27) are arranged on the swing gear (7).

2. A switchgear cabinet shutter opening and locking device as claimed in claim 1, characterized in that: the rotating device comprises a rotating drum (10) arranged in the installation cylinder (3), rotating shafts (11) which are in running fit with the installation cylinder (3) are coaxially and fixedly arranged at two ends of the rotating drum (10), a rotating handle (4) is coaxially connected with one of the rotating shafts (11), a magnetic block cavity (12) for clamping a magnetic block (8) is arranged in the rotating drum (10), and NS poles of the magnetic block (8) are respectively positioned at two sides of the rotating shafts (11).

3. The switchgear cabinet shutter opening and locking device as claimed in claim 2, characterized in that: install magnetic conduction piece (9) of downwardly extending in control section of thick bamboo (6), magnetic conduction piece (9) are for being located two of rotary drum (10) both sides side, still install the elevating gear who reciprocates by changeing (4) drive magnetic conduction piece (9) in control section of thick bamboo (6).

4. A switchgear cabinet shutter opening and locking device as claimed in claim 3, characterized in that: when the NS pole of the driving magnetic block (8) of the rotating handle (4) is arranged left and right, the rotating handle (4) also synchronously drives the magnetic conduction block (9) to move downwards to the lower stroke limit point, and when the NS pole of the driving magnetic block (8) of the rotating handle (4) is arranged up and down, the rotating handle (4) also synchronously drives the magnetic conduction block (9) to move upwards to the upper stroke limit point.

5. The switchgear cabinet shutter opening and locking device according to claim 4, characterized in that: elevating gear is including setting firmly gear (13) in rotary drum (10) periphery, install rack (14) with the vertical setting of gear (13) meshing on magnetic conduction piece (9), link board (15) rigid coupling together through non-magnetism in two magnetic conduction piece (9) upper ends, two magnetic conduction piece (9) lower parts are equipped with extension piece (16) that extend in opposite directions, gear (13) lower part and extension piece (16) lower limit cooperation when rotating rack (14) lower extreme, gear (13) and link board (15) upper limit cooperation when rotating rack (14) upper end gear (13).

6. The switchgear cabinet shutter opening and locking device according to claim 5, characterized in that: the lower part of the magnetic conduction block (9) is a cone which is thin at the bottom and thick at the top and is in plug-in fit with the positioning hole (17) on the track (21), and the lower end surface of the magnetic conduction block (9) is a plane.

7. The switchgear cabinet shutter opening and locking device as claimed in claim 6, characterized in that: the front end of the chassis (1) is fixedly provided with a fixed plate (18), and the fixed plate (18) is provided with an upper fixed hole row (19) matched with the upper driving block and a lower fixed hole row (20) matched with the lower driving block.

8. A switchgear cabinet shutter opening and locking device as claimed in any one of claims 1 to 7, characterized in that: the rotating handle (4) drives the positioning pin (5) to swing out of the pin hole (23) and simultaneously drives the magnetic block (8) to rotate to the position with the strongest magnetic attraction force on the switch cabinet, and the rotating handle (4) drives the positioning pin (5) to swing into the pin hole (23) and simultaneously drives the magnetic block (8) to rotate to the position with the weakest magnetic attraction force on the switch cabinet.

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