Split interlocking mechanism of inflatable cabinet

Abstract

The present invention discloses a split interlocking mechanism of an inflatable cabinet, which is mainly composed of a limit shaft, a first interlocking crank arm, a closing brake assembly, a driving member, a transmission assembly and a reset assembly. By arranging the first interlocking crank arm on the main shaft of the circuit breaker operating mechanism, connecting the limit shaft on the key shaft of the knife switch type three-position mechanism, and arranging the closing brake assembly, the driving member, the transmission assembly and the reset assembly between the first interlocking crank arm and the limit shaft, the function that the rotating valve of the three-position mechanism cannot be opened by rotating the key for manual operation when the circuit breaker of the inflatable cabinet is in the closed state is realized, and the function that the circuit breaker cannot be closed during the manual operation of the three-position mechanism in the open state is also realized. Therefore, the present invention realizes the mechanical interlocking function between the three-position isolation grounding switch of the inflatable cabinet and the circuit breaker, and has the advantages of simple structure, active interlocking and safety and reliability.

Description

Technical Field

[0001] The invention relates to an interlocking mechanism, in particular to a split interlocking mechanism for an inflatable cabinet. Background Art

[0002] Cubical Gas Insulated Switchgear, referred to as C-GIS, is a primary power distribution system with a circuit breaker as the main switch, used for 10-35kV or higher voltage levels. The inflatable ring main unit uses a load switch as the main switch, and also has a circuit breaker solution, which is used for 10-35kV secondary power distribution systems. Inflatable cabinets are usually a general term for C-GIS and inflatable ring main units.

[0003] The gas-filled cabinet uses GIS's insulation and sealing technologies to install high-voltage components in a box-type sealed container, which is then filled with insulating gas at a pressure slightly higher than atmospheric pressure. It is manufactured using modern advanced processing technology to form a complete set of serial products, which have the functions of control, protection, measurement, monitoring and communication of power distribution under normal and fault conditions.

[0004] At present, the inflatable cabinet usually includes a three-position isolating grounding switch and a circuit breaker. According to different structures, the operating mechanism of the three-position isolating grounding switch of the inflatable cabinet is divided into a knife-type three-position mechanism and a direct-acting three-position mechanism. For the inflatable cabinet with a knife-type three-position mechanism and a circuit breaker, it is necessary to meet the requirement that the three-position mechanism is not allowed to be manually operated when the circuit breaker is in the closed state, and the three-position mechanism is allowed to be manually operated only when the circuit breaker is in the open state; and it is required that the circuit breaker cannot be closed during the manual operation of the three-position mechanism. Therefore, an interlock is usually provided between the three-position mechanism of the inflatable cabinet and the operating mechanism of the circuit breaker. However, in the prior art, the interlock between some three-position mechanisms and the operating mechanism of the circuit breaker is a passive interlock by limiting the rotation of the output shaft of the three-position isolating grounding switch, and the reliability is poor. The interlock between other three-position mechanisms and the operating mechanism of the circuit breaker has the problems of complex structure, cumbersome installation, and a single interlocking method, and it is impossible to ensure that the interlock is in place. Summary of the invention

[0005] In order to overcome the above defects, the present invention provides a split interlocking mechanism for an inflatable cabinet, which realizes the mechanical interlocking function between the three-position isolating grounding switch and the circuit breaker of the inflatable cabinet, and has the advantages of simple structure, active interlocking and safety and reliability.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A split interlocking mechanism of an inflatable cabinet is used to realize the interlocking between the knife-type three-position mechanism of the inflatable cabinet and the circuit breaker operating mechanism of the inflatable cabinet. The split interlocking mechanism of the inflatable cabinet includes a limit shaft, a first interlocking crank arm, a closing brake assembly, a driving member, a transmission assembly and a reset assembly. The limit shaft is fixedly connected to the key shaft of the knife-type three-position mechanism, the first interlocking crank arm is fixedly connected to the main shaft of the circuit breaker operating mechanism, the driving member is installed on the limit shaft, the transmission assembly is arranged between the first interlocking crank arm and the driving member, and the bottom end of the transmission assembly is opposite to the first interlocking crank arm up and down; the closing brake assembly is installed in the middle of the transmission assembly; when the circuit breaker of the inflatable cabinet is closed, the first interlocking crank arm on the main shaft rotates to abut against the bottom end of the transmission assembly, so that the transmission The top of the component is against the driving member to brake the limit shaft, so that the key cannot operate the key shaft to open the rotary valve of the knife-type three-position mechanism; when the circuit breaker of the inflatable cabinet is opened and the key shaft needs to be operated by the key to open the rotary valve of the knife-type three-position mechanism, the first interlocking crank arm on the main shaft rotates to a position away from the bottom end of the transmission component, and the key shaft can drive the driving member to rotate through the limit shaft by counterclockwise or clockwise rotation, so that one end of the driving member drives the transmission component and the closing brake component downward, so that the closing brake component brakes the closing drive component of the circuit breaker operating mechanism and stores energy in the reset component; when the key is rotated to close the rotary valve, the energy stored in the reset component is released, which can drive the closing brake component, the transmission component and the driving member to reset.

[0008] As a further improvement of the present invention, the transmission assembly includes a transmission rod and an interlocking plate, the interlocking plate includes a first vertical plate and a first horizontal plate formed on the top of the first vertical plate, the first horizontal plate is arranged below the driving member, and a notch groove for avoiding the limiting axis is formed at the connection between the first vertical plate and the first horizontal plate, the top end of the transmission rod is fixedly connected to the first vertical plate, and the bottom end of the transmission rod is opposite to the first interlocking crank arm up and down.

[0009] As a further improvement of the present invention, the interlocking plate also includes a second horizontal plate and a second vertical plate, the second horizontal plate is connected between the first vertical plate and the second vertical plate, two first waist-shaped holes are formed on the second vertical plate, and the second vertical plate is fixedly connected to the transmission rod by fasteners passing through the first waist-shaped holes.

[0010] As a further improvement of the present invention, the reset assembly includes a fixed bent plate and a reset spring, the middle part of the fixed bent plate is installed on the side wall of the frame of the circuit breaker operating mechanism, the reset spring is arranged between two opposite arms of the fixed bent plate, the middle part of the transmission rod is movably penetrated into the through holes of the reset spring and the two arms, and the transmission rod moves downward to compress the reset spring to store energy.

[0011] As a further improvement of the present invention, the structure in which the transmission rod moves downward to compress the return spring to store energy is as follows: a pressure pin and a pressure plate are installed on the transmission rod, the pressure pin and the pressure plate are arranged between the two support arms, the pressure pin is installed in the pin hole on the transmission rod, the pressure plate is movably sleeved on the transmission rod, and the pressure plate is positioned between the top of the return spring and the pressure pin.

[0012] As a further improvement of the present invention, the closing brake assembly includes a closing limit plate and a connecting rod, the middle part of the closing limit plate is rotatably mounted on the frame of the circuit breaker operating mechanism through a pin shaft, one end of the connecting rod is fixedly connected to the transmission rod, and the other end of the connecting rod is inserted into the second waist-shaped hole on the closing limit plate; when the transmission rod drives the connecting rod to move downward, the connecting rod drives the closing limit plate to rotate, so that the support foot of the closing limit plate abuts against the closing drive assembly.

[0013] As a further improvement of the present invention, the closing drive assembly includes a closing coil, a first closing arm, a closing connecting plate, a second closing arm, a closing cam and a closing spring. The first closing arm, the second closing arm and the closing cam are respectively rotatably mounted on the frame of the circuit breaker operating mechanism. The second closing arm has a connecting arm with an obtuse angle and a closing energy storage retaining latch. A closing roller is fixed on the closing cam; the two ends of the closing connecting plate are respectively rotatably connected to the connecting arms of the first closing arm and the second closing arm, the closing spring elastically abuts against one side surface of the closing roller, and in the open state, the closing energy storage retaining latch of the second closing arm abuts against the other side surface opposite to the closing roller ; A closing coil push rod is provided on the closing coil. When closing, the foot of the closing limit plate is separated from the braking point of the first closing arm. After receiving the closing signal, the closing coil drives the closing coil push rod to push the first closing arm to rotate, and drives the second closing arm to rotate through the closing connecting plate, so that the closing energy storage holding latch is disengaged from the closing roller. At the same time, the closing spring pushes the closing cam to rotate and hits the main roller on the main shaft to complete the closing; in the opening state, after the rotary valve is opened by operating the key shaft with a key, the foot of the closing limit plate abuts against the braking point of the first closing arm, so that the closing coil push rod of the closing coil cannot push the first closing arm to rotate.

[0014] As a further improvement of the present invention, the transmission rod is square, the first interlocking crank arm includes a disc body and a square column, the disc body is fixed on the main shaft, the square column is connected to the outer edge of the disc body, and the square column is opposite to the bottom end of the transmission rod.

[0015] As a further improvement of the present invention, the knife gate type three-station mechanism includes the key shaft and the rotary valve, and also includes a frame, a position conversion plate and a drive plate, the position conversion plate is installed on the front side of the frame, the centerline position of the rotary valve is rotatably installed on the front side of the position conversion plate near the top through a pin shaft, the limit shaft is rotatably installed on the frame, the key shaft is fixedly connected to the front end of the limit shaft, and the key shaft passes through the front side of the position conversion plate and is located below the rotary valve; the drive plate is arranged between the rotary valve and the front side of the position conversion plate, the bottom end of the drive plate is fixedly connected to the key shaft, a first sliding pin is formed at a position near the top of the front side of the drive plate, a second sliding pin is formed at a position near the key shaft on the rear side of the drive plate, a slide groove extending along the centerline is formed at a position near the pin shaft at the centerline position of the rotary valve, the first sliding pin is penetrated in the slide groove, a clearance groove is formed at a position near the key shaft on the position conversion plate, and the second slide groove is penetrated in the clearance groove.

[0016] As a further improvement of the present invention, the knife switch type three-station mechanism also includes an operating panel, an isolation operating shaft and a grounding operating shaft. A first bending plate is formed on the left and right sides and the upper and lower sides of the position conversion plate, and the position conversion plate is installed on the front side of the frame through the first bending plate. A second bending plate is formed on the left and right sides of the operating panel, and the operating panel is installed on the front side of the position conversion plate through the second bending plate. The rotary valve and the drive plate are arranged between the operating panel and the position conversion plate, the isolation operating shaft and the grounding operating shaft are rotatably installed on the frame, and the operating panel is formed with an isolation operating hole corresponding to the isolation operating shaft, a grounding operating hole corresponding to the grounding operating shaft, and a key operating hole corresponding to the key shaft.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a split interlocking mechanism of an inflatable cabinet, by arranging a first interlocking crank arm on the main shaft of the circuit breaker operating mechanism, connecting a limit shaft to the key shaft of the knife switch type three-position mechanism, and arranging a closing brake assembly, a driving member, a transmission assembly and a reset assembly between the first interlocking crank arm and the limit shaft, the function that the rotating valve of the three-position mechanism cannot be opened by rotating the key for manual operation when the circuit breaker of the inflatable cabinet is in the closed state is realized, and the function that the circuit breaker cannot be closed during the manual operation of the three-position mechanism in the open state is also realized. Therefore, the present invention realizes the mechanical interlocking function between the three-position isolation grounding switch of the inflatable cabinet and the circuit breaker, and has the advantages of simple structure, active interlocking and safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the split interlocking mechanism of the inflatable cabinet of the present invention;

[0019] Figure 2 A three-dimensional diagram of the split interlocking mechanism of the inflatable cabinet of the present invention from the front view;

[0020] Figure 3 A three-dimensional diagram of the split interlocking mechanism of the inflatable cabinet of the present invention from the back side;

[0021] Figure 4 It is a structural schematic diagram of the knife-type three-station mechanism of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the circuit breaker operating mechanism of the present invention;

[0023] Combined with the attached drawings, the following description is given:

[0024] 1-limiting shaft, 2-first interlocking crank arm, 21-disk, 22-square column, 3-closing brake assembly, 31-closing limit plate, 311-second waist-shaped hole, 312-support foot, 32-connecting rod, 4-driving member, 5-transmission assembly, 51-transmission rod, 511-pin hole, 52-interlocking plate, 521-first vertical plate, 522-first horizontal plate, 523-notch groove, 524-second horizontal plate, 525-second vertical plate, 5251-first waist-shaped hole, 6-reset assembly, 61-fixed bent plate, 611-support arm, 62-reset spring, 7-pressing sheet, 110-key shaft, 120-rotating valve, 121-slideway, 130-frame, 140-position conversion plate, 1 41-avoidance groove, 142-first bending plate, 150-driving plate, 151-first sliding pin, 152-second sliding pin, 160-pin shaft, 170-operating panel, 171-second bending plate, 172-isolating operating hole, 173-grounding operating hole, 174-key operating hole, 180-isolating operating shaft, 190-grounding operating shaft, 210-main shaft, 220-closing drive assembly, 221-closing coil, 2211-closing coil push rod, 222-closing first turning arm, 223-closing connecting plate, 224-closing second turning arm, 2241-connecting arm, 2242-closing energy storage holding latch, 225-closing cam, 2251-closing roller, 226-closing spring. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, is a split interlocking mechanism of an inflatable cabinet described in the present invention, which is used to realize the mechanical interlocking between the knife-type three-position mechanism of the inflatable cabinet and the circuit breaker operating mechanism of the inflatable cabinet. The split interlocking mechanism of the inflatable cabinet includes a limit shaft 1, a first interlocking crank arm 2, a closing brake assembly 3, a driving member 4, a transmission assembly 5 and a reset assembly 6. The limit shaft is fixedly connected to the key shaft 110 of the knife-type three-position mechanism, the first interlocking crank arm is fixedly connected to the main shaft 210 of the circuit breaker operating mechanism, the driving member is installed on the limit shaft, the transmission assembly is arranged between the first interlocking crank arm and the driving member, and the bottom end of the transmission assembly is opposite to the first interlocking crank arm in upper and lower directions; the closing brake assembly is installed in the middle of the transmission assembly; when the circuit breaker of the inflatable cabinet is closed, the first interlocking crank arm on the main shaft rotates to abut against the bottom end of the transmission assembly position, so that the top of the transmission assembly is against the driving member, the limit shaft is braked, and the key cannot operate the key shaft to open the rotary valve 120 of the knife switch type three-position mechanism; when the circuit breaker of the inflatable cabinet is opened, and the key shaft needs to be operated by the key to open the rotary valve of the knife switch type three-position mechanism, the first interlocking crank arm on the main shaft rotates to a position away from the bottom end of the transmission assembly, and the key shaft can drive the driving member to rotate through the limit shaft by counterclockwise or clockwise rotation, so that one end of the driving member drives the transmission assembly and the closing brake assembly downward, so that the closing brake assembly brakes the closing drive assembly 220 of the circuit breaker operating mechanism, and the reset assembly stores energy; when the key is rotated to close the rotary valve, the energy stored in the reset assembly is released, which can drive the closing brake assembly, the transmission assembly and the driving member to reset.

[0027] In the above structure, by setting a first interlocking crank arm on the main shaft of the circuit breaker operating mechanism, connecting a limit shaft to the key shaft of the knife switch type three-position mechanism, and setting a closing brake assembly, a driving member, a transmission assembly and a reset assembly between the first interlocking crank arm and the limit shaft, the function that the rotating valve of the three-position mechanism cannot be opened by rotating the key for manual operation when the circuit breaker of the inflatable cabinet is in the closed state is realized, and the function that the circuit breaker cannot be closed during the manual operation of the three-position mechanism in the open state is also realized. Therefore, the present invention realizes the mechanical interlocking function between the knife switch type three-position mechanism and the circuit breaker operating mechanism, and has the advantages of simple structure, active interlocking and safety and reliability.

[0028] The working principle of the split interlocking mechanism of the inflatable cabinet of the present invention is as follows:

[0029] When the circuit breaker is in the closed state, the first interlocking crank arm on the main shaft of the circuit breaker operating mechanism just rotates to the position that abuts the bottom end of the transmission assembly, for example, the first interlocking crank arm just faces upward. At this time, the transmission assembly cannot move downward, so that the top end of the transmission assembly just abuts the driving member installed on the limit shaft, so that the limit shaft and the key shaft cannot rotate, that is, the limit shaft and the key shaft are braked, so that the key shaft cannot be operated by the key, that is, the rotary valve of the three-position mechanism is locked, and the rotary valve cannot rotate counterclockwise or clockwise, and cannot be opened, so that the rotary valve blocks the isolation operating shaft and the grounding operating shaft of the three-position isolation and grounding switch, and the three-position mechanism cannot be manually operated.

[0030] In the circuit breaker off state, the first interlocking crank arm on the main shaft of the circuit breaker operating mechanism rotates a certain angle and disengages from the bottom end of the transmission assembly, such as rotating inward at an acute angle. At this time, the transmission assembly can move downward, the drive member is not locked, the limit shaft and the key shaft can rotate, and the key shaft can be operated by the key, and then the key shaft drives the rotary valve to rotate counterclockwise or clockwise, that is, the rotary valve of the three-position mechanism is unlocked. At this time, the rotary valve can be opened and the three-position mechanism can be manually operated by the operating handle. For example, when the isolation operating shaft of the three-position isolation grounding switch needs to be manually operated, the key shaft is operated by the key to drive the rotary valve to rotate counterclockwise, so that the drive member (such as a pin rod) installed on the limit shaft moves downward, and then drives the transmission assembly to move downward. In order to ensure that the circuit breaker cannot be closed during the manual operation of the three-position mechanism, the present invention is provided with a closing brake assembly, that is, when the transmission assembly is driven downward, the closing brake assembly is simultaneously driven to move downward, and the closing brake assembly brakes the closing drive assembly of the circuit breaker operating mechanism. In other words, when the three-position mechanism is manually operated, the closing function of the circuit breaker is locked, which can prevent the circuit breaker from being closed due to touching the closing coil due to misoperation or misoperation by backstage personnel.

[0031] In the above structure, the reset assembly is used to reset the transmission assembly, the closing brake assembly and the driving member to ensure that after the three-position mechanism is operated, the closing brake assembly can unlock the closing drive assembly. And the driving member can be reset to the initial position, even if the rotary valve is in the middle position, at this time, the rotary valve can block the isolation operation shaft and the grounding operation shaft of the three-position isolation grounding switch.

[0032] In the above structure, the driving member is used to drive the transmission assembly when the limit shaft rotates counterclockwise or clockwise, so the driving member can be in the form of a pin rod, and the pin rod is transversely inserted into the pin hole on the limit shaft, that is, whether the limit shaft rotates counterclockwise or clockwise, the transmission assembly can be driven to move downward by the pin rod. However, the driving member is not limited to this, and can also be in other forms, such as a bent plate with two arms.

[0033] Preferably, the transmission assembly includes a transmission rod 51 and an interlocking plate 52, wherein the interlocking plate includes a first vertical plate 521 and a first horizontal plate 522 formed on the top of the first vertical plate, the first horizontal plate is arranged below the driving member, a notch groove 523 for avoiding the limiting shaft is formed at the connection between the first vertical plate and the first horizontal plate, the top end of the transmission rod is fixedly connected to the first vertical plate, and the bottom end of the transmission rod is opposite to the first interlocking crank arm in the upper and lower directions. In this way, the function of simultaneously abutting the left and right ends of the driving member can be realized through the interlocking plate, the function of cooperating with the first interlocking crank arm can be realized through the transmission rod, and the transmission rod does not take up much space and is convenient for installing the reset assembly.

[0034] Preferably, the interlocking plate also includes a second horizontal plate 524 and a second vertical plate 525, the second horizontal plate is connected between the first vertical plate and the second vertical plate, two first waist-shaped holes 5251 are formed on the second vertical plate, and the second vertical plate is fixedly connected to the transmission rod by fasteners penetrated through the first waist-shaped holes. In this way, the height of the transmission rod can be adjusted up and down according to the distance between the main shaft and the driving member. The second horizontal plate is connected between the first vertical plate and the second vertical plate to meet the situation that the driving member and the first interlocking crank arm on the main shaft are not opposite to each other up and down. If the driving member is just above the first interlocking crank arm, the second horizontal plate can be omitted, and the first vertical plate and the second vertical plate can be combined together. Preferably, the first horizontal plate, the first vertical plate, the second horizontal plate and the second vertical plate are integrally formed.

[0035] Preferably, the reset assembly includes a fixed bent plate 61 and a reset spring 62, the middle part of the fixed bent plate is installed on the side wall of the frame of the circuit breaker operating mechanism, the reset spring is arranged between two opposite arms 611 of the fixed bent plate, the middle part of the transmission rod is movably inserted into the through holes of the reset spring and the two arms, and the downward movement of the transmission rod can compress the reset spring to store energy. In this way, the function of the reset transmission assembly driving the closing brake assembly to reset is realized through the cooperation of the transmission rod with the fixed bent plate and the reset spring. The fixed bent plate is provided with two opposite arms, and the reset spring is arranged between the two arms, which can also play a role in limiting and guiding the transmission rod. As a preferred embodiment, the reset assembly is composed of a fixed bent plate 611 and a reset spring 62, which realizes the function of the reset assembly, but is not limited to this. In other structures, the reset assembly can also be composed of a fixed plate, a guide column and a reset spring. At this time, a connecting piece can be added to the transmission rod, the fixed plate is installed on the frame of the circuit breaker operating mechanism, and the guide column is installed between the connecting piece and the fixed plate, and the reset spring is sleeved on the guide column and located between the connecting piece and the fixed plate.

[0036] Preferably, the structure in which the transmission rod moves downward to compress the reset spring to store energy is as follows: a pressing pin and a pressing plate 7 are installed on the transmission rod, the pressing pin and the pressing plate are arranged between the two support arms, the pressing pin is installed in the pin hole 511 on the transmission rod, the pressing plate is movably sleeved on the transmission rod, and the pressing plate is positioned between the top of the reset spring and the pressing pin. In this way, by arranging a pin hole on the transmission rod and installing a pressing pin in the pin hole, when the pressing pin moves downward with the transmission rod, the pressing plate can be driven to compress the reset spring to store energy.

[0037] Preferably, the closing brake assembly includes a closing limit plate 31 and a connecting rod 32, the middle part of the closing limit plate is rotatably mounted on the frame of the circuit breaker operating mechanism through a pin shaft, one end of the connecting rod is fixedly connected to the transmission rod, and the other end of the connecting rod is inserted into the second waist-shaped hole 311 on the closing limit plate; when the transmission rod drives the connecting rod to move downward, the connecting rod drives the closing limit plate to rotate, so that the support foot 312 of the closing limit plate abuts against the closing drive assembly.

[0038] Preferably, the closing drive assembly includes a closing coil 221, a first closing arm 222, a closing connecting plate 223, a second closing arm 224, a closing cam 225 and a closing spring 226, wherein the first closing arm, the second closing arm and the closing cam are rotatably mounted on the frame of the circuit breaker operating mechanism, respectively, the second closing arm has a connecting arm 2241 and a closing energy storage retaining latch 2242 at an obtuse angle, and a closing roller 2251 is fixed on the closing cam; the two ends of the closing connecting plate are rotatably connected to the connecting arms of the first closing arm and the second closing arm, respectively, the closing spring elastically abuts against one side surface of the closing roller, and in the open state, the closing energy storage retaining latch of the second closing arm abuts against the On the other side opposite to the closing roller; a closing coil push rod 2211 is provided on the closing coil. When closing, the foot of the closing limit plate is separated from the braking point of the first closing arm. After receiving the closing signal, the closing coil drives the closing coil push rod to push the first closing arm to rotate, and drives the second closing arm to rotate through the closing connecting plate, so that the closing energy storage holding latch is separated from the closing roller. At the same time, the closing spring pushes the closing cam to rotate and hits the main roller on the main shaft to complete the closing; in the opening state, after opening the rotary valve, the foot of the closing limit plate abuts against the braking point of the first closing arm, so that the closing coil push rod of the closing coil cannot push the first closing arm to rotate. In this way, the locking and unlocking functions of the closing drive assembly are realized through the cooperation between the support leg of the closing limit plate and the closing first crank arm of the closing drive assembly, thereby realizing the function of being unable to close the circuit breaker during the manual operation of the three-position mechanism in the open state. In this embodiment, the cooperation between the closing limit plate and the closing first crank arm of the gate drive assembly is adopted, but it is not limited to this. In other embodiments, the cooperation between the closing limit plate and the closing second crank arm can also be adopted as needed.

[0039] Preferably, the transmission rod is square, and the first interlocking crank arm includes a disk body 21 and a square column 22, the disk body is sleeved on the main shaft, the square column is connected to the outer edge of the disk body, and the square column is vertically opposite to the bottom end of the transmission rod. In this way, the function of locking the transmission rod to move downward can be achieved through the cooperation between the square transmission rod and the square column of the first interlocking crank arm, but it is not limited to this, and can also be designed as other mutually cooperating structures for abutment as needed, and the transmission rod can also be of other shapes.

[0040] The split interlocking mechanism of the inflatable cabinet of the present invention is suitable for all longitudinally arranged knife-type three-position mechanisms. Preferably, the knife-type three-position mechanism includes the key shaft 110 and the rotary valve 120, and also includes a frame 130, a position conversion plate 140 and a drive plate 150. The position conversion plate is installed on the front side of the frame, and the midline position of the rotary valve is rotatably installed on the front side of the position conversion plate near the top through a pin shaft 160. The limit shaft is rotatably installed on the frame, and the key shaft is fixed to the front end of the limit shaft, and the key shaft passes through the front side of the position conversion plate and is positioned. Below the rotary valve; the drive plate is arranged between the rotary valve and the front side of the position conversion plate, the bottom end of the drive plate is fixed to the key shaft, the front side of the drive plate is formed with a first sliding pin 151 near the top, the rear side of the drive plate is formed with a second sliding pin 152 near the key shaft, the midline position of the rotary valve is formed with a slide groove 121 extending along the midline near the pin shaft, the first sliding pin is inserted into the slide groove, the position conversion plate is formed with a clearance groove 141 near the key shaft, and the second slide groove is inserted into the clearance groove. In this way, when the key shaft is operated by the key, the key shaft drives the drive plate to rotate, and the drive plate can then drive the rotary valve to rotate counterclockwise or clockwise (counterclockwise or clockwise), so that the rotary valve is in three positions: only blocking the isolation operating shaft, only blocking the grounding operating shaft, and blocking both the isolation operating shaft and the grounding operating shaft. The first sliding pin cooperates with the sliding groove to apply driving force to the rotary valve, and the second sliding pin cooperates with the air avoidance groove to guide and limit the driving plate.

[0041] Preferably, the knife switch type three-station mechanism further includes an operation panel 170, an isolation operation shaft 180 and a grounding operation shaft 190, the left and right sides and the upper and lower sides of the position conversion plate are formed with a first bending plate 142, the position conversion plate is installed on the front side of the frame through the first bending plate, the left and right sides of the operation panel are formed with a second bending plate 171, the operation panel is installed on the front side of the position conversion plate through the second bending plate, the rotary valve and the drive plate are arranged between the operation panel and the position conversion plate, the isolation operation shaft and the grounding operation shaft are rotatably installed on the frame, and the operation panel is formed with an isolation operation hole 172 corresponding to the isolation operation shaft, a grounding operation hole 173 corresponding to the grounding operation shaft and a key operation hole 174 corresponding to the key shaft. Here, the operation panel is used to surround the rotary valve and the drive plate and other components, play a protective role, and has a beautiful appearance. The isolation operation hole, the grounding operation hole and the key operation hole are formed on the operation panel, and the operation of the isolation operation shaft, the grounding operation shaft and the key shaft can be realized. You can also set operation logos on the operation panel as needed.

[0042] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A split interlocking mechanism of an inflatable cabinet, used to realize the interlocking between the knife switch type three-position mechanism of the inflatable cabinet and the circuit breaker operating mechanism of the inflatable cabinet, characterized in that: The split interlocking mechanism of the inflatable cabinet comprises a limit shaft (1), a first interlocking crank arm (2), a closing brake assembly (3), a driving member (4), a transmission assembly (5) and a reset assembly (6); the limit shaft is fixedly connected to the key shaft (110) of the knife switch type three-position mechanism; the first interlocking crank arm is fixedly connected to the main shaft (210) of the circuit breaker operating mechanism; the driving member is mounted on the limit shaft; the transmission assembly is arranged between the first interlocking crank arm and the driving member; the bottom end of the transmission assembly is vertically opposite to the first interlocking crank arm; the closing brake assembly is mounted in the middle of the transmission assembly; when the circuit breaker of the inflatable cabinet is closed, the first interlocking crank arm on the main shaft rotates to abut against the transmission assembly The bottom end of the transmission assembly is positioned such that the top end of the transmission assembly abuts against the driving member, brakes the limit shaft, and prevents the key from operating the key shaft to open the rotary valve (120) of the knife switch type three-position mechanism; when the circuit breaker of the inflatable cabinet is opened and it is necessary to operate the key shaft by a key to open the rotary valve of the knife switch type three-position mechanism, the first interlocking crank arm on the main shaft rotates to a position away from the bottom end of the transmission assembly, and the key shaft rotates counterclockwise or clockwise to drive the driving member to rotate through the limit shaft, so that one end of the driving member drives the transmission assembly and the closing brake assembly downward, so that the closing brake assembly brakes the closing drive assembly (220) of the circuit breaker operating mechanism and causes the reset assembly to store energy; When the key is turned to close the rotary valve, the energy stored in the reset component is released, and the closing brake component, the transmission component and the drive member can be driven to reset; The transmission assembly comprises a transmission rod (51) and an interlocking plate (52), the interlocking plate comprises a first vertical plate (521) and a first horizontal plate (522) formed on the top of the first vertical plate, the first horizontal plate is arranged below the driving member, a notch groove (523) for avoiding the limiting shaft is formed at the connection between the first vertical plate and the first horizontal plate, the top end of the transmission rod is fixedly connected to the first vertical plate, and the bottom end of the transmission rod is vertically opposite to the first interlocking crank arm; The knife gate type three-station mechanism comprises the key shaft (110) and the rotary valve (120), and also comprises a frame (130), a position conversion plate (140) and a drive plate (150), wherein the position conversion plate is mounted on the front side of the frame, the midline position of the rotary valve is rotatably mounted on the front side of the position conversion plate near the top through a pin shaft (160), the limit shaft is rotatably mounted on the frame, the key shaft is fixedly connected to the front end of the limit shaft, and the key shaft passes through the front side of the position conversion plate and is located below the rotary valve; the drive plate (150) is provided with a plurality of locking members, wherein the locking members are ... A plate is arranged between the rotary valve and the front side of the position conversion plate, the bottom end of the drive plate is fixedly connected to the key shaft, a first sliding pin (151) is formed at a position near the top end of the front side of the drive plate, a second sliding pin (152) is formed at a position near the key shaft at the rear side of the drive plate, a sliding groove (121) extending along the midline is formed at a position near the pin shaft at a midline position of the rotary valve, the first sliding pin is inserted into the sliding groove, a clearance groove (141) is formed at a position near the key shaft on the position conversion plate, and the second sliding pin is inserted into the clearance groove.

2. The split interlocking mechanism of the inflatable cabinet according to claim 1 is characterized in that: The interlocking plate further comprises a second horizontal plate (524) and a second vertical plate (525), wherein the second horizontal plate is connected between the first vertical plate and the second vertical plate, and two first waist-shaped holes (5251) are formed on the second vertical plate, and the second vertical plate is fixedly connected to the transmission rod via a fastener penetrating through the first waist-shaped holes.

3. The split interlocking mechanism of the inflatable cabinet according to claim 1 is characterized in that: The reset assembly comprises a fixed bent plate (61) and a reset spring (62), wherein the middle portion of the fixed bent plate is mounted on the side wall of the frame of the circuit breaker operating mechanism, the reset spring is arranged between two opposite support arms (611) of the fixed bent plate, the middle portion of the transmission rod is movably arranged in through holes of the reset spring and the two support arms, and the transmission rod can compress the reset spring to store energy when it moves downward.

4. The split interlocking mechanism of the inflatable cabinet according to claim 3 is characterized in that: The structure in which the transmission rod moves downward to compress the return spring to store energy is as follows: a pressing pin and a pressing plate (7) are installed on the transmission rod, the pressing pin and the pressing plate are arranged between the two support arms, the pressing pin is installed in a pin hole (511) on the transmission rod, the pressing plate is movably sleeved on the transmission rod, and the pressing plate is positioned between the top end of the return spring and the pressing pin.

5. The split interlocking mechanism of the inflatable cabinet according to claim 1 is characterized in that: The closing brake assembly comprises a closing limit plate (31) and a connecting rod (32); the middle portion of the closing limit plate is rotatably mounted on the frame of the circuit breaker operating mechanism via a pin shaft; one end of the connecting rod is fixedly connected to the transmission rod, and the other end of the connecting rod is inserted into a second waist-shaped hole (311) on the closing limit plate; when the transmission rod drives the connecting rod to move downward, the connecting rod drives the closing limit plate to rotate, so that the support foot (312) of the closing limit plate abuts against the closing drive assembly.

6. The split interlocking mechanism of the inflatable cabinet according to claim 5 is characterized in that: The closing drive assembly comprises a closing coil (221), a first closing arm (222), a closing connecting plate (223), a second closing arm (224), a closing cam (225) and a closing spring (226); the first closing arm, the second closing arm and the closing cam are rotatably mounted on the frame of the circuit breaker operating mechanism respectively; the second closing arm has a connecting arm (2241) and a closing energy storage retaining latch (2242) at an obtuse angle; a closing roller (2251) is fixed on the closing cam; the two ends of the closing connecting plate are rotatably connected to the connecting arms of the first closing arm and the second closing arm respectively; the closing spring elastically abuts against one side surface of the closing roller; in the open state, the closing energy storage retaining latch of the second closing arm abuts against the closing roller The closing coil is connected to the other side of the closing roller; a closing coil push rod (2211) is provided on the closing coil. When closing, the foot of the closing limit plate is separated from the braking point of the first closing arm. After receiving the closing signal, the closing coil drives the closing coil push rod to push the first closing arm to rotate, and drives the second closing arm to rotate through the closing connecting plate, so that the closing energy storage retaining latch is separated from the closing roller. At the same time, the closing spring pushes the closing cam to rotate and hits the main roller on the main shaft to complete the closing; in the opening state, after the rotary valve is opened by operating the key shaft through the key, the foot of the closing limit plate abuts against the braking point of the first closing arm, so that the closing coil push rod of the closing coil cannot push the first closing arm to rotate.

7. The split interlocking mechanism of the inflatable cabinet according to claim 1 is characterized in that: The transmission rod is square in shape, and the first interlocking crank arm comprises a disc (21) and a square column (22), wherein the disc is sleeved on the main shaft, and the square column is connected to the outer edge of the disc, and the square column is vertically opposite to the bottom end of the transmission rod.

8. The split interlocking mechanism of the inflatable cabinet according to claim 7 is characterized in that: The knife switch type three-station mechanism also includes an operating panel (170), an isolating operating shaft (180) and a grounding operating shaft (190); first bending plates (142) are formed on the left and right sides and the upper and lower sides of the position conversion plate; the position conversion plate is mounted on the front side of the frame through the first bending plates; second bending plates (171) are formed on the left and right sides of the operating panel; the operating panel is mounted on the front side of the position conversion plate through the second bending plates; the rotary valve and the driving plate are arranged between the operating panel and the position conversion plate; the isolating operating shaft and the grounding operating shaft are rotatably mounted on the frame; and an isolating operating hole (172) corresponding to the isolating operating shaft, a grounding operating hole (173) corresponding to the grounding operating shaft and a key operating hole (174) corresponding to the key shaft are formed on the operating panel.

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