A three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet

Abstract

When the sliding block is unlocked, the front end of the interlocking plate is tilted downwards to release the restriction of the door lock plate on the cable room door, so that the cable room door can be opened and closed. When the sliding block loses the force of the sliding block, the horizontal block and the vertical block return to their original positions under the action of the reset torsion spring, and the horizontal block causes the front end of the interlocking plate to tilt upwards to buckle or block the door lock plate on the cable room door, so that the cable room door cannot be opened or closed.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical manufacturing, and in particular to a three-position switch mechanism and a cable room door interlocking device for an environmentally friendly gas-filled cabinet. Background Art

[0002] The three-position switch is an important component of the environmental protection inflatable cabinet. It is a mechanical device that can operate to complete the switching action of the three-position switch working position. It includes three working position states: closing, isolating, and grounding. There is a mechanical locking function between the positions to prevent the grounding switch from being closed when the main circuit of the equipment is energized, avoiding the possibility of misoperation.

[0003] Under normal operation of the environmentally friendly inflatable cabinet, the cable compartment door is closed. At this time, the primary main circuit is energized, and the cable compartment door cannot be opened from the outside. When maintenance is required, the circuit breaker should first be opened, the three-position switch should be operated to the grounded position, and then the circuit breaker should be closed. The cable compartment door can only be opened after the interlock device is released. When maintenance is completed, the cable compartment door should be closed before the circuit breaker can be opened. The three-position switch should be operated to the closed position, and then the circuit breaker should be closed to complete the power supply of the primary main circuit. The cable compartment door can only be opened and closed when the three-position switch is in the grounded position and the circuit breaker is in the closed position.

[0004] Due to the small size, compact structure, and modular components of environmentally friendly inflatable cabinets, interlocking structure arrangements are often difficult to implement or complex. Currently, environmentally friendly inflatable cabinets on the market are generally small in size and most use electrical interlocking instead.

[0005] Electrical interlocking is a more commonly used interlocking method in environmentally friendly inflatable cabinets because of its simple structure and easy installation. That is, an electromagnetic lock device is installed on the cable room door, so that the electromagnetic lock device and the live display form a reverse electrical locking circuit (the live display gives a signal through the primary circuit). That is, after the primary circuit is powered off, the electromagnetic lock will be energized through the secondary control power supply to attract the lock core, and the cable room door can be opened. After the primary circuit is energized, the electromagnetic lock will be powered off and lose its suction, and the cable room door cannot be opened. However, this method has a low safety factor and components are easily damaged.

[0006] The electrical interlocking system uses a capacitive sensor on the inlet bushing side of the gas cabinet to obtain an electrical signal as a locking condition to supply the electromagnetic actuator to determine whether to lock the cable room door. The reliability of the electrical interlocking system depends on multiple factors such as the electromagnetic lock and the acquisition of electrical signals. It has insufficient control over human misoperation and has certain safety hazards. It cannot fully guarantee the operation and maintenance safety of the equipment, posing a threat to the life safety of the operation and maintenance personnel and causing serious property losses.

[0007] The absence or malfunction of the interlocking device may cause the operator to mistakenly open the cable room door when the power is on, causing certain accidents, threatening the operator's personal safety and causing serious property losses.

[0008] Therefore, it can be seen that how to improve the reliability of the interlocking device between the three-position switch and the cable room door to ensure the safe operation of the equipment is a problem that needs to be solved in this field. Summary of the Invention

[0009] In view of the technical problem of low reliability of the electrical interlock between the existing three-position switch and the cable room door, the purpose of the present invention is to provide a three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet. The mechanical interlock has higher reliability than the electrical interlock, and overcomes the problems existing in the prior art.

[0010] In order to achieve the above-mentioned object, the present invention provides a three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet, which is characterized by comprising a slider assembly, a vertical shaft, a horizontal shaft, an interlocking plate, a door lock plate, a return torsion spring and a return spring;

[0011] The slider assembly is arranged on the three-position switch mechanism to be constructed; the slider assembly, the vertical axis, and the horizontal axis are sequentially driven and connected; the horizontal axis is driven and connected to the interlock plate; the return torsion spring is arranged on the horizontal axis; the return spring is driven and connected to the interlock plate; the interlock plate is cooperatively connected with the door lock plate; the door lock plate is arranged on the cable room door to be constructed; the middle partition plate is arranged between the three-position switch mechanism to be constructed and the cable room door;

[0012] When the force of the slider assembly drives the vertical axis and the horizontal axis to rotate in sequence, when the horizontal axis rotates, the restraint on the interlocking plate is released, so that the front end of the interlocking plate tilts downward under the action of the reset spring to release the restriction on the door lock plate on the cable room door, that is, the cable room door to be constructed can be opened and closed;

[0013] When the vertical axis loses the force of the slider assembly, the horizontal axis and the vertical axis return to their original positions under the action of the reset torsion spring. The action of the horizontal axis causes the front end of the interlocking plate to tilt upward to block the door lock plate on the cable room door. At this time, the cable room door cannot be opened or closed.

[0014] Furthermore, the slider assembly is composed of a sliding guide shaft and a position indicating screw shaft; the position indicating screw shaft is rotated by the drive of the three-position switch mechanism to be constructed; the position indicating screw is driven and connected to the limit slider, driving the limit slider to slide; the limit slider is cooperatively connected to the sliding guide shaft and can slide within the sliding guide shaft.

[0015] Furthermore, a fixed guide block is provided between one end of the vertical shaft and the three-position switch mechanism to be constructed; the shaft end of the vertical shaft passes through the fixed guide block and is fixed, and the vertical shaft is limited by the fixed guide block.

[0016] Furthermore, a first interlocking crank arm is provided at one end of the vertical shaft; the first interlocking crank arm is located below the fixed guide block and is on the same horizontal plane as the limiting slider; the first interlocking crank arm transmits the power of the limiting slider to the vertical shaft.

[0017] Furthermore, a second interlocking crank arm for receiving vertical shaft power is provided at the other end of the vertical shaft.

[0018] Furthermore, the second interlocking crank arm is connected to a third interlocking crank arm; the third interlocking crank arm is fixed on one end of the horizontal shaft; the third interlocking crank arm receives the action of the second interlocking crank arm and transmits it to the horizontal shaft.

[0019] Furthermore, a fourth interlocking crank arm is provided at the other end of the horizontal shaft; the fourth interlocking crank arm is cooperatively connected with the interlocking plate; the fourth interlocking crank arm receives the transmission of the horizontal shaft to drive the interlocking plate to rotate.

[0020] Furthermore, the door lock plate is provided with a door lock hole for mating and connecting with the interlock plate.

[0021] The present invention provides an interlocking device between a three-position switch mechanism and a cable room door for an environmentally friendly inflatable cabinet. The interlocking device is interconnected through a crank arm, a rotating shaft, a locking plate, and a return spring, so that a mechanical linkage device is formed between the three-position switch mechanism and the cable room door. The structure is simple and the performance is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the overall installation structure of the interlocking device;

[0025] Figure 2 Schematic diagram of the overall structure of the interlocking device;

[0026] Figure 3 It is a side view schematic diagram of the overall structure of the interlocking device;

[0027] Figure 4 This is the assembly side view of the interlocking device;

[0028] Figure 5 This is a schematic diagram of the working process of this interlocking device.

[0029] 1. Three-position switch mechanism; 2. Fixed guide block; 3. First interlocking crank arm; 4. Limit slider; 5. Vertical axis; 6. Interlocking fixed mounting plate; 7. Middle partition plate; 8. Cable room door; 9. First side fixed guide plate; 10. Second side fixed guide plate; 11. Fourth interlocking crank arm; 12. Interlocking plate rotation axis; 13. Horizontal axis; 14. Interlocking fixed plate; 15. Interlocking plate; 16. Door lock plate; 17. Second interlocking crank arm; 18. First fixed pin; 19. Third interlocking crank arm; 20. Second fixed pin; 21. Return torsion spring; 22. Return spring. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0031] In response to the technical problem of low reliability of the electrical interlock between the existing three-position switch and the cable room door, this solution provides a three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet based on the technical problem. The interlocking device is connected to each other through a crank arm, a rotating shaft, a chain plate, and a reset spring, so that a mechanical linkage device is formed between the three-position switch mechanism and the cable room door. It has a simple structure and reliable performance.

[0032] The interlocking device in this solution includes a three-position switch mechanism 1, see Figure 1-Figure 4 , slider assembly, fixed guide block 2, first interlocking crank arm 3, vertical axis 5, middle partition 7, fourth interlocking crank arm 11, horizontal axis 13, interlocking plate 15, door lock plate 16, second interlocking crank arm 17, third interlocking crank arm 19, reset torsion spring 21, reset spring 22.

[0033] The three-position switch mechanism 1 includes three indication positions: closing, isolating, and grounding. The structure and working process of the three-position switch mechanism 1 are well known to those skilled in the art and will not be described in detail here.

[0034] The fixed guide block 2 is fixed to the frame plate of the three-position switch mechanism 1 by fastening screws, and its axial holes are arranged in an upper and lower direction; the axial end step of the vertical axis 5 passes through the axial hole of the fixed guide block 2, and then the end face is fixed with fasteners so that the vertical axis 5 cannot move up and down.

[0035] The fixed guide block 2 is connected to the vertical shaft 5 , which can provide support for the upper end of the vertical shaft 5 on the one hand, and serve as an axial limit for the vertical shaft 5 on the other hand.

[0036] The slider assembly is composed of a limit slider 4, a sliding guide shaft (not shown in the figure), and a position indicating screw shaft (not shown in the figure).

[0037] The limit slider 4 is fixed to the three-position switch mechanism 1 through a sliding guide shaft and a position indicating screw shaft; the sliding guide shaft is coaxial with the guide shaft hole on the limit slider 4, and the limit slider 4 can slide along the sliding guide shaft.

[0038] The position indicating screw rod and the limit slider 4 are matched through a trapezoidal thread. When the three-position switch mechanism 1 is actuated, the position indicating screw rod shaft will be driven to rotate. During the rotation of the position indicating screw rod shaft, the limit slider 4 will be driven to move, so that the limit slider 4 slides along the sliding guide shaft.

[0039] The first interlocking crank arm 3 is welded and fixed to the upper shoulder of the vertical shaft 5. After installation, it is located below the fixed guide block 2 and is on the same horizontal plane as the sliding pin on the limit slider 4. When the limit slider 4 moves to the ground position, the limit slider 4 will push the first interlocking crank arm 3 to move.

[0040] One end of the vertical shaft 5 is fixed to the fixed guide block 2, which is used to transmit axial rotation movement to the first interlocking crank arm 3; the other end is fixed to the first side fixed guide plate 9, which is used to provide support for the lower end of the vertical shaft 5.

[0041] The interlocking fixed mounting plate 6 is used to fix and support the first side fixed guide plate 9 and the second side fixed guide plate 10 ; it is installed on the middle partition plate 7 .

[0042] The middle partition plate 7 is used to fix the interlocking fixed mounting plate 6. Its front end contains a door lock plate lock hole and also serves to isolate the three-position switch mechanism 1 from the cable room door 8.

[0043] The second interlocking crank arm 17 is fixed to the lower end of the vertical shaft 5 and is drivingly connected to the third interlocking crank arm 19 through the first fixing pin 18, and is used to transmit the movement of the vertical shaft 5 and drive the third interlocking crank arm 19 to move through the thrust.

[0044] The third interlocking crank arm 19 is fixed to the transverse shaft 13 by a second fixing pin 20 ; the third interlocking crank arm 19 receives the action from the second interlocking crank arm 17 and transmits the action to the transverse shaft 13 , thereby driving the transverse shaft 13 to rotate.

[0045] The horizontal shaft 13 transmits the motion from the vertical shaft 5 , converting the longitudinal rotation into a lateral rotation; the second side fixed guide plate 10 is installed at the right end of the horizontal shaft 13 .

[0046] At the same time, a reset torsion spring 21 is added in the middle of the horizontal axis 13 for reset; wherein, the reset torsion spring 21 is sleeved on the horizontal axis 13, and one end of the two torsion arms is pressed on the fixed pin of the horizontal axis 13, where the fixed pin plays a limiting role to maintain the pre-torsion of the torsion spring, and the other end is pressed on the second side fixed guide plate 10.

[0047] When the force acting on the upper limit slider 4 of the three-position switch mechanism 1 is reduced on the first interlocking crank arm 3, the force of the reset torsion spring 21 is greater than the rotational force of the horizontal shaft 13, and the horizontal shaft 13 rotates under the action of the reset torsion spring 21, and the torsion spring releases energy; when the force acting on the upper limit slider 4 of the three-position switch mechanism 1 is increased on the first interlocking crank arm 3, the horizontal shaft 13 is rotated through the first interlocking crank arm 3. At this time, the rotational force of the horizontal shaft 13 is greater than the torsion spring force, and the torsion spring stores energy.

[0048] Furthermore, the right end of the horizontal shaft 13 passes through the second side fixed guide plate 10 and is connected to the fourth interlocking crank arm 11. The rotation of the horizontal shaft 13 drives the fourth interlocking crank arm 11 to move.

[0049] The interlocking plate rotating shaft 12 connects the interlocking fixed plate 14 and the interlocking plate 15 ; the interlocking plate 15 is connected to the fourth interlocking crank arm 11 ; the fourth interlocking crank arm 11 rotates to drive the interlocking plate 15 to rotate around the interlocking plate rotating shaft 12 .

[0050] One end of the return spring 22 is hooked on the middle row of holes on the interlocking fixed plate 14, and the other end is hooked and pulled on the side row of holes on the rear side of the interlocking plate 15; when the interlocking plate 15 receives the force of the fourth interlocking crank arm 11, the front end of the interlocking plate 15 will rotate around the interlocking plate rotation axis 12, the front end will be tilted up, the return spring 22 will be stretched, and the return spring 22 will store energy; when the force applied to the interlocking plate 15 by the fourth interlocking crank arm 11 is reduced, the front end of the interlocking plate 15 will gradually tilt downward under the action of the rebound force of the return spring 22, and the return spring 22 will release energy.

[0051] The door lock plate 16 is installed at the upper right end of the cable room door 8 . The door lock plate 16 contains two threaded fixing holes and is fixed by fastening screws; it cooperates with the interlocking plate 15 .

[0052] The interlock plate 15 is used to limit the door lock plate 16; when the front end of the interlock plate 15 tilts downward under the action of the rebound force of the reset spring 22, it can be inserted into or pulled out of the door lock hole on the middle partition plate 7, that is, the cable room door 8 can be opened or closed; when the interlock plate 15 receives the force of the fourth interlocking crank arm 11, the front end of the interlock plate 15 tilts upward to block or buckle the door lock hole on the middle partition plate 7, and the door lock plate 16 cannot be inserted or pulled out, that is, the cable room door 8 cannot be opened or closed.

[0053] The following example illustrates its working process in a specific application:

[0054] In specific applications, when the three-position switch mechanism 1 is in action, it drives the position indicating screw shaft to rotate. During the rotation of the position indicating screw shaft, it drives the limit slider 4 to move, causing the limit slider 4 to slide along the sliding guide shaft.

[0055] See also Figure 5When it reaches the grounding indication position, it will press against the first interlocking crank arm 3, one end of which is fixed to the fixed guide block 2 on the three-position switch mechanism 1, driving the first interlocking crank arm 3, the vertical axis 5, and the second interlocking crank arm 17 to rotate around the vertical axis. The first fixed pin 18 on the second interlocking crank arm 17 drives the second fixed pin 20 on the third interlocking crank arm 19 to move, so that the third interlocking crank arm 19 drives the horizontal axis 13 to rotate. The rotation of the horizontal axis 13 will drive the fourth interlocking crank arm 11 at the end of the horizontal axis to rotate, gradually releasing the restraint on the interlocking plate 15, so that the front end of the interlocking plate 15 tilts downward under the action of the reset spring 22 to release the restriction of the door lock plate 16 on the cable room door 8. The cable room door 8 can be opened after the circuit breaker is closed again.

[0056] When the three-position switch mechanism 1 moves from the grounding position to the isolation position, the first interlocking crank arm 3 loses the force exerted by the limit slider 4 on it, and the horizontal axis 13 and the vertical axis 5 return to their original positions under the action of the reset torsion spring 21. The fourth interlocking crank arm 11 moves to make the interlocking plate 15 rotate around the interlocking plate rotation axis 12, and the front end is tilted upward to buckle or block the front end lock plate hole of the middle partition plate 7. At this time, the cable room door 8 cannot be opened or closed.

[0057] The above-mentioned solution constitutes an interlocking device for a three-position switch mechanism and a cable compartment door for an environmentally friendly inflatable cabinet. The interlocking device forms a mechanical interlock between the three-position switch mechanism and the cable compartment door through a crank arm, a rotating shaft, an interlocking plate, a door lock plate, a reset spring, etc. The cable compartment door can only be opened when the three-position switch is in the grounded position and the circuit breaker is closed, providing a safety guarantee for equipment operation and maintenance. If a fault occurs inside the equipment and the cable compartment door cannot be opened, the fasteners between the door lock plate and the cable compartment door can be removed from the outside for forced unlocking and removal. When used in practice, it has the following advantages:

[0058] (1) Provide safety protection for the operation and maintenance of environmentally friendly inflatable cabinets, and reduce the probability of accidents caused by misoperation;

[0059] (2) Simple structure, reliable performance and easy installation;

[0060] (3) The interlocking state can be forcibly released from the outside to eliminate the fault, which greatly improves the safety of the device.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet, characterized in that: It includes a slider assembly, a vertical axis, a horizontal axis, a middle partition, an interlocking plate, a door lock plate, a first interlocking crank arm, a second interlocking crank arm, a third interlocking crank arm, an interlocking fixed mounting plate, a reset torsion spring and a reset spring; The slider assembly is arranged on the three-position switch mechanism to be constructed; the slider assembly, the vertical axis, and the horizontal axis are driven and connected in sequence; a fixed guide block is provided between one end of the vertical axis and the three-position switch mechanism to be constructed; the end of the vertical axis is fixed through the fixed guide block, and the vertical axis is limited by the fixed guide block; the horizontal axis is driven to connect the interlock plate; the return torsion spring is arranged on the horizontal axis; the return spring is driven to connect the interlock plate; the interlock plate is matched with the door lock plate; the door lock plate is arranged on the cable room door to be constructed; the middle partition plate is arranged between the three-position switch mechanism to be constructed and the cable room door; The first interlocking crank arm is fixed to the upper shoulder of the vertical shaft and is located below the fixed guide block after installation, and is on the same horizontal plane as the sliding pin on the limit slider in the slider assembly. When the limit slider moves to the ground position, the limit slider pushes the first interlocking crank arm to move; One end of the vertical shaft is fixed to the fixed guide block, which is used to transmit axial rotation to the first interlocking crank arm; the other end of the vertical shaft is fixed to the first side fixed guide plate, which is used to provide support for the lower end of the vertical shaft; the interlocking fixed mounting plate is used to fix and support the first side fixed guide plate and the second side fixed guide plate, and is installed on the middle partition plate; The second interlocking crank arm is fixed to the lower end of the vertical shaft and is drivingly connected to the third interlocking crank arm through a first fixing pin, and is used to transmit the vertical shaft movement and drive the third interlocking crank arm to move through thrust; The third interlocking crank arm is provided with a second fixing pin and is fixed to the transverse shaft. The first fixing pin on the second interlocking crank arm drives the second fixing pin on the third interlocking crank arm to move, so that the third interlocking crank arm drives the transverse shaft to rotate; the other end of the transverse shaft is provided with a fourth interlocking crank arm; the fourth interlocking crank arm is cooperatively connected with the interlocking plate; the fourth interlocking crank arm receives the transmission of the transverse shaft to drive the interlocking plate to rotate; When the force of the slider assembly drives the vertical axis and the horizontal axis to rotate in sequence, when the horizontal axis rotates, the restraint on the interlocking plate is released, so that the front end of the interlocking plate tilts downward under the action of the reset spring to release the restriction on the door lock plate on the cable room door, that is, the cable room door to be constructed can be opened and closed; When the vertical axis loses the force of the slider assembly, the horizontal axis and the vertical axis return to their original positions under the action of the reset torsion spring. The action of the horizontal axis causes the front end of the interlocking plate to tilt upward to block the door lock plate on the cable room door. At this time, the cable room door cannot be opened or closed.

2. The three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet according to claim 1 is characterized in that: The slider assembly is composed of a sliding guide shaft and a position indicating screw shaft; the position indicating screw shaft is rotated by the drive of the three-position switch mechanism to be constructed; the position indicating screw is driven and connected to the limit slider, driving the limit slider to slide; the limit slider is cooperatively connected to the sliding guide shaft and can slide within the sliding guide shaft.

3. The three-position switch mechanism and cable room door interlocking device for an environmentally friendly inflatable cabinet according to claim 1 is characterized in that: The door lock plate is provided with a door lock hole for matching and connecting with the interlock plate.

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