Reset assembly of switch cabinet and switch cabinet thereof

Abstract

The invention relates to the related technical field of switch cabinet door reset, discloses a reset assembly of a switch cabinet and the switch cabinet thereof, and aims to solve the problem that a cabinet door is always closed, so that a worker needs to frequently open the cabinet door. The connecting rod is pulled by the cabinet door to elastically compress the restoring spring in the buffer pipe, and after the pushing force to the cabinet door is relieved, the restoring spring pushes the piston plate to extrude the buffer cavity, so that air flow in the buffer cavity is slowly discharged from the damping groove, and the purpose that the cabinet door is slowly closed by pulling the connecting rod is achieved; if the cabinet door touches a working operator in the closing process, the connecting rod can press the coil switch through the switching feeler lever, so that the winding coil is electrified to generate magnetism, and the return spring is compressed again by utilizing the attraction of the winding coil to the piston plate, so that the operator does not need to manually push the cabinet door to open; the timely opening and closing effect of the cabinet door is realized.

Description

Technical Field

[0001] The present application relates to the technical field related to switch cabinet door resetting, and in particular to a switch cabinet resetting component and the switch cabinet thereof. Background Art

[0002] Switchgear is an important electrical equipment, which is mainly used for the control, protection, measurement and distribution of power systems. By operating the opening and closing switches and the equipped distribution protection devices, the switchgear can effectively monitor the power system in real time and provide necessary safety protection, thereby ensuring the stable and reliable operation of the power system.

[0003] In actual operation, when workers need to inspect, repair or adjust the inside of the switch cabinet, they need to open the cabinet door manually. However, when leaving, workers may easily forget to keep the cabinet door closed due to negligence or being busy at work, causing the cabinet door to remain open. This may not only hinder the progress of work, but also bring safety hazards.

[0004] Although some switch cabinets are equipped with electric cabinet door automatic closing devices similar to door closers, which are designed to ensure that the cabinet door can be automatically closed when no one is operating, in actual applications, this automatic recovery function may cause unnecessary interference when the staff are performing internal operations. For example, when the staff is working in the cabinet, the cabinet door may be accidentally closed due to the automatic recovery function, which not only interrupts the work process, but also may cause danger to the staff.

[0005] To solve this problem, staff have to frequently push the cabinet door manually to keep it open. This practice is not only inefficient, but also increases the workload of staff and also poses certain safety risks. Obviously, this current approach is neither safe nor convenient enough. Summary of the invention

[0006] The present application proposes a reset assembly of a switch cabinet and a switch cabinet thereof, which have the advantage of timely opening and closing of cabinet doors, and are used to solve the problem in the above background technology that the cabinet doors are always closed, causing the staff to frequently open the cabinet doors.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a reset component of a switch cabinet, comprising: a cabinet body, which is hinged with the cabinet door and has a positioning rod fixedly installed on the inner top; a support head, which is installed to the bottom of the positioning rod and has a buffer tube installed on the outer side, a buffer cavity is provided inside the buffer tube, a cut-off switch is fixedly connected to the inner top of the buffer tube, and a start switch is fixedly connected to the inner bottom of the buffer tube; a piston plate, which is movably installed inside the buffer tube, has a damping groove provided on the outer side, and has a coil switch fixedly connected to the inner side; a connecting rod, which is sleeved on the middle part of the piston plate, has one end fixedly connected to the switching disk, and the other end hinged to one side of the cabinet door, has a switching contact rod fixedly connected to the end of the switching disk, and the piston plate and the switching disk are connected through a detection spring; an end cover, which is installed at the end of the buffer tube and has an exhaust hole on the surface; a limit plate, which is fixedly connected to the side of the connecting rod, and a restoring spring is connected between the limit plate and the end cover; a winding coil, which is fixed to the end of the end cover and generates magnetic attraction to the piston plate when energized.

[0008] Furthermore, a limited motion top block is movably installed on the inner side of the buffer tube, one end of the limited motion top block is fixedly connected to a limited motion spring, one end of the limited motion spring is fixedly connected to the inner side of the buffer tube, and a ventilation groove and an air intake groove are provided on the inner side of the buffer tube below the limited motion top block, and the ventilation groove and the air intake groove are connected and disconnected by the limited motion top block, the ventilation groove is connected to the buffer cavity, and the air intake groove is connected to the outside.

[0009] Furthermore, the elastic force of the limiting spring is greater than the elastic force of the restoring spring.

[0010] Furthermore, a gap is left between the limiting top block and the inner top of the buffer tube, and the limiting top block is located at one quarter of the length of the buffer tube.

[0011] Furthermore, a bearing is fixedly installed at the end of the buffer tube, and the inner side of the bearing is fixedly installed with the outer side of the support head, a gear is fixed on the outer side of the buffer tube, a gear row is fixed on the inner top of the cabinet, and the gear row is meshed with the gear.

[0012] Furthermore, the width of the limiting top block is smaller than the groove width of the damping groove, and the surface shape of the limiting top block is a right-angle trapezoid.

[0013] Furthermore, a safety stopper is arranged on one side of the piston plate.

[0014] Furthermore, a weight ball is fixedly connected to the outer side of the buffer tube.

[0015] The present invention further provides a switch cabinet for a switch cabinet reset assembly, wherein an arc-shaped retaining frame is fixedly connected to one side of the cabinet body, and an indicator line is provided on the inner side of the arc-shaped retaining frame.

[0016] The present invention has the following beneficial effects:

[0017] The present application provides a switch cabinet reset component and switch cabinet thereof, wherein the switch cabinet realizes the automatic slow closing and timely opening and closing functions of the cabinet door through the designed reset component. When the cabinet door needs to be opened, the operator applies a pulling force to pull the cabinet door open. In this process, the cabinet door is pulled by the connecting rod, thereby elastically compressing the restoring spring in the buffer tube. At this time, the spring accumulates sufficient potential energy.

[0018] Once the operator releases the force on the cabinet door, the restoring spring releases the potential energy previously accumulated, pushing the piston plate to squeeze the buffer chamber. Since there is a damping groove inside the buffer chamber, the air flow can be slowly discharged from it, producing a damping effect, so that the connecting rod can smoothly pull the cabinet door and achieve slow closing.

[0019] If the cabinet door accidentally touches the operator who is working during the closing process, the reset component will respond immediately. At this time, the connecting rod passes through the switching disk at its end, causing the switching contact rod to press the coil switch. This action causes the winding coil to be energized and generate magnetism. Using this magnetism, the winding coil attracts the piston plate, causing the restoring spring to be compressed again. This process does not require the operator to manually push the cabinet door open, but automatically realizes the timely opening and closing of the cabinet door, ensuring the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall external three-dimensional structure;

[0023] Figure 2 It is a schematic diagram of the overall internal sectional three-dimensional structure;

[0024] Figure 3 It is a schematic diagram of the overall top cross-sectional plan structure;

[0025] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0026] Figure 5 for Figure 3 The enlarged structural diagram at B in the middle;

[0027] Figure 6 for Figure 3 The enlarged structural diagram at C in the middle;

[0028] Figure 7 This is a schematic diagram of the structure when the bottom of the cabinet is removed and viewed from above;

[0029] Figure 8 Schematic diagram of the internal three-dimensional structure of the buffer tube;

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the weighted ball;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the piston plate.

[0032] In the figure: 1. cabinet body; 2. cabinet door; 3. arc-shaped baffle; 300. indicator line; 4. positioning rod; 5. support head; 6. buffer tube; 600. buffer chamber; 601. air inlet groove; 602. ventilation groove; 7. counterweight ball; 8. gear; 9. end cover; 900. exhaust hole; 10. connecting rod; 100. limit plate; 101. switching plate; 102. switching contact rod; 11. gear row; 12. recovery spring; 13. bearing; 14. piston plate; 140. damping groove; 141. safety block; 15. detection spring; 16. cut-off switch; 17. coil switch; 18. limit top block; 180. limit spring; 19. start switch; 20. winding coil. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Embodiment 1

[0035] See also Figure 1-Figure 3 As can be seen from the figure, the cabinet body 1 and the cabinet door 2 are hinged, and the cabinet door 2 can be opened by pulling the handle fixed on the surface of the cabinet door 2, so that the operator can maintain the electrical appliances and switches placed inside the cabinet body 1.

[0036] The positioning rod 4 is fixedly mounted on the inner top of the cabinet 1. Figure 8 It can be clearly seen that a support head 5 is movably mounted at the bottom of the positioning rod 4, and a buffer tube 6 is mounted on the outside of the support head 5. When the buffer tube 6 deflects left and right, the support head 5 can deflect with the center line of the positioning rod 4 as the axis. The buffer tube 6 is cylindrical in shape, and a buffer cavity 600 with one end open is provided inside. The piston plate 14 located in the buffer cavity 600 is movably mounted inside the buffer tube 6. Figure 4It can be seen that the middle movable sleeve of the piston plate 14 is provided with a connecting rod 10, which can only reciprocate up and down along the center line of the piston plate 14. One end of the connecting rod 10 is fixedly connected to a switching disk 101 located on one side of the piston plate 14, and the piston plate 14 and the switching disk 101 are connected by a detection spring 15. Figure 8 It can be seen that the other end of the connecting rod 10 is hinged to the inner side of the cabinet door 2 . When the construction worker pulls the cabinet door 2 outward, the connecting rod 10 is pulled out of the buffer cavity 600 through the cabinet door 2 .

[0037] The end of the buffer tube 6 is threadedly connected with an end cap 9, and a plurality of exhaust holes 900 are provided on the surface of the end cap 9. The end cap 9 can be used to block the opening of the buffer cavity 600, so that the airflow in the buffer cavity 600 can only communicate with the outside through the exhaust holes 900. At the same time, the fixing of the end cap 9 limits the position of the mechanism installed in the buffer cavity 600 to prevent the mechanism from being accidentally pulled out of the buffer cavity 600.

[0038] Combination Figure 3 and Figure 4 It can be seen that the side of the connecting rod 10 is fixedly connected to a limit plate 100 located on one side of the piston plate 14, and a restoring spring 12 is connected between the limit plate 100 and the end cover 9. The limit plate 100 is pushed by the elastic force of the restoring spring 12 to always have a tendency to drive the connecting rod 10 to push upward. It can be seen that under normal circumstances, the connecting rod 10 is forced to retract into the inside of the buffer tube 6 by the elastic force of the restoring spring 12. During the retraction of the connecting rod 10, the cabinet door 2 will be pulled in the direction close to the cabinet body 1, so that the cabinet body 1 can be closed by using the cabinet door 2, thereby protecting the electrical appliances and switches inside the cabinet body 1.

[0039] A damping groove 140 is provided on one side of the piston plate 14. Figure 4 It can be seen that the buffer chamber 600 area above the piston plate 14 can only communicate with the buffer chamber 600 below through the damping groove 140. When the connecting rod 10 pulls the piston plate 14 up and down, the damping groove 140 cannot quickly relieve the pressure in the buffer chamber 600, which will also cause resistance to the movement of the piston plate 14.

[0040] The end of the switching disk 101 is fixedly connected with a switching contact rod 102 located on one side of the detection spring 15, and the inner side of the piston plate 14 is fixedly connected with a coil switch 17 located below the switching contact rod 102. When the switching contact rod 102 is inserted into the piston plate 14, the switching contact rod 102 will touch the coil switch 17, so that the winding coil 20 fixed on the end of the end cover 9 is energized and generates magnetism. The time for generating magnetism can be controlled to be about 6-10 seconds. The magnetism generated by the winding coil 20 will attract the piston plate 14, causing the piston plate 14 to move downward and compress the recovery spring 12. Furthermore, in order to ensure the smooth opening and closing of the cabinet door 2, combined with Figure 4 and Figure 6 It can be clearly seen that the top of the inner side of the buffer tube 6 is fixedly connected with a cut-off switch 16 located above the connecting rod 10, and the bottom of the inner side of the buffer tube 6 is fixedly connected with a start switch 19 located on one side of the winding coil 20. When the cut-off switch 16 is turned on, the coil switch 17 will no longer work. Only when the start switch 19 is turned on, the coil switch 17 will enter the working state. For the circuit arrangement in this application, it is only necessary to meet the above operations. Preferably, a programmable controller commonly used in this industry is used for adjustment.

[0041] In actual application, the limit plate 100 is subjected to the elastic force of the return spring 12 so that the connecting rod 10 is retracted into the buffer cavity 600. Figure 4 As can be seen from the figure, the connecting rod 10 contacts the cut-off switch 16. At this time, under the control of the programmable controller, the coil switch 17 does not work. Figure 2 It can be seen that the cabinet door 2 is pulled by the connecting rod 10 to close the cabinet body 1.

[0042] When the staff needs to maintain the electrical appliances inside the cabinet 1, they pull the cabinet door 2 clockwise through the handle on the cabinet door 2, referring to the direction Figure 2 When the cabinet door 2 is pulled outward, the cabinet door 2 will synchronously pull the connecting rod 10 out of the buffer tube 6. At this time, since the connecting rod 10 and the cabinet door 2 are hinged, the support head 5 and the positioning rod 4 are also equivalent to being hinged. When the cabinet door 2 is opened, the buffer tube 6 deflects clockwise with the positioning rod 4 as the central axis, and the connecting rod 10 is pulled out of the buffer cavity 600. At the same time, when the connecting rod 10 is pulled outward, the connecting rod 10 drives the switching contact rod 102 to extend outward synchronously by using the switching disk 101, until the switching contact rod 102 hits the piston plate 14 and pushes the piston plate 14 out of the buffer cavity 600. Although the switching contact rod 102 contacts the coil switch 17 at this time, since the disconnection switch 16 is activated, the winding coil 20 will not generate magnetism.

[0043] As the operator pulls the cabinet door 2 outward to open, the switching contact rod 102 pushes the piston plate 14 to move in the buffer chamber 600. Figure 4 As can be seen from the figure, when the piston plate 14 moves downward, the air flow pressure in the buffer chamber 600 above the piston plate 14 will decrease, and the damping groove 140 cannot quickly replenish the air flow, causing the downward resistance of the piston plate 14 to increase, so that the cabinet door 2 can only be opened slowly until the piston plate 14 passes over the start switch 19. Figure 4 and Figure 6It can be known from the content that when the piston plate 14 contacts the starting switch 19, the starting switch 19 is turned on so that the coil switch 17 starts working, so that the winding coil 20 is energized and generates magnetism, and the piston plate 14 is attracted by the magnetism of the winding coil 20, and moves further downward and passes over the starting switch 19. After that, the starting switch 19 will extend again, and as the connecting rod 10 pulls the switching disk 101 downward, the starting switch 19 blocks the switching disk 101, so that the switching disk 101 pulls the switching contact rod 102 to disengage from the coil switch 17. At this point, the cabinet door 2 is fully opened, and the operator can perform maintenance operations on the electrical appliances inside the cabinet 1.

[0044] After the countdown of the winding coil 20 being powered on ends, the buffer chamber 600 located above the piston plate 14 is also relatively balanced due to the damping groove 140 and the external pressure. Afterwards, the elastic force of the recovery spring 12 will push the switching disk 101 upward, and the detection spring 15 will stretch and pull the piston plate 14 upward. Since the airflow in the buffer chamber 600 located above the piston plate 14 cannot be quickly discharged from the damping groove 140 when the piston plate 14 moves upward, the piston plate 14 has resistance when moving upward until the limit plate 100 hits the bottom of the piston plate 14. At this time, the switching contact rod 102 is away from the coil switch 17, and the limit plate 100 pushes the piston plate 14 to move slowly upward.

[0045] If the operator leaves immediately after debugging, the elastic force of the recovery spring 12 will force the piston plate 14 to move upward all the time until the switching disk 101 first pushes into the cut-off switch 16, so that the coil switch 17 does not work. At this time, the connecting rod 10 is attached to the inner top of the buffer tube 6, and the connecting rod 10 cannot move. The connecting rod 10 also pulls the cabinet door 2 to completely close the cabinet body 1. Under the action of the elastic force recovery, the detection spring 15 gradually pulls the piston plate 14 to continue to move upward until the switching contact rod 102 presses the coil switch 17 again. Figure 4 As shown in , at this time, it returns to the normal position mentioned above.

[0046] If the connecting rod 10 is pulling the cabinet door 2 to slowly close while the operator is still maintaining the machine in the cabinet 1, the slowly moving cabinet door 2 will be blocked by the operator and unable to continue to recover. As the damping groove 140 is connected, the buffer chamber 600 above the piston plate 14 will be connected to the outside air through the buffer chamber 600 below the piston plate 14 and the exhaust hole 900. The connecting rod 10 that no longer moves will make the buffer chamber 600 above the piston plate 14 continuously balance with the external pressure through the damping groove 140. As the pressure above the piston plate 14 decreases, the detection spring 15 will be elastically restored to pull the piston plate 14 upward until the switching touch rod 102 touches the coil switch 17. Since the coil switch 17 is in working state at this time, when the coil switch 17 is connected, the winding coil 20 is energized again to generate magnetism, and the magnetic pull of the winding coil 20 will cause the piston plate 14 to compress the restoring spring 12 again, and the piston plate 14 will eventually pass the starting switch 19. Finally, when the countdown for the winding coil 20 to be energized ends, the piston plate 14 will move upward again in the above manner under the elastic force of the restoring spring 12.

[0047] Embodiment 2

[0048] During the movement of the piston plate 14, the airflow in the buffer chamber 600 above the piston plate 14 can only be adjusted to balance the pressure with the outside through the damping groove 140. However, in the actual application, when the operator pulls the cabinet door 2 to open and the winding coil 20 attracts the piston plate 14, the piston plate 14 needs to move quickly to ensure that the cabinet door 2 can be opened quickly, thereby reducing the time required for the operator to open the cabinet door 2. In order to solve this problem, please refer to Figure 3 and Figure 5 As can be seen, a limited motion top block 18 is movably installed inside the buffer tube 6, and the end of the limited motion top block 18 is located in the buffer cavity 600, and one end of the limited motion top block 18 is fixedly connected to the limited motion spring 180. Figure 5It can be seen that one end of the limit spring 180 is fixedly connected to the inner side of the buffer tube 6. When the limit top block 18 moves left and right, it needs to overcome the elastic force of the limit spring 180. The inner side of the buffer tube 6 is provided with a ventilation groove 602 and an air inlet groove 601 located below the limit top block 18, and the ventilation groove 602 and the air inlet groove 601 are connected and disconnected through the limit top block 18. When the limit top block 18 moves to the right, after the limit top block 18 passes over the ventilation groove 602, the ventilation groove 602 and the air inlet groove 601 are directly connected. Since the ventilation groove 602 is connected to the buffer chamber 600, and the air inlet groove 601 is connected to the outside, the buffer chamber 600 can be directly connected to the outside through the ventilation groove 602 and the air inlet groove 601; similarly, when the limit top block 18 moves to the left and leaves the air inlet groove 601, the ventilation groove 602 and the air inlet groove 601 can be connected again. Under normal conditions, the limit spring 180 is affected by the elastic force of the limit top block 18, so that the air exchange groove 602 and the air inlet groove 601 are separated. It should be noted that the elastic force of the limit spring 180 is greater than the elastic force of the restoring spring 12. Specifically:

[0049] When the operator pulls the cabinet door 2 outward by the handle, as described in the content of Example 1, the connecting rod 10 pulls the piston plate 14 outward. When the piston plate 14 passes over the limit top block 18, the reduced pressure in the buffer chamber 600 above the piston plate 14 will pull the limit top block 18 to the left, causing the limit spring 180 to elastically stretch. At this time, the ventilation groove 602 and the air inlet groove 601 are connected, and the buffer chamber 600 above the piston plate 14 is directly connected to the outside. The pressure in the buffer chamber 600 above the piston plate 14 is relieved, resulting in a reduction in the resistance to the downward movement of the piston plate 14. The connecting rod 10 can quickly pull the piston plate 14 downward, and the cabinet door 2 can be quickly opened. During this process, the coil switch 17 will not interact with the switching contact rod 102. Similarly, when the restoring spring 12 pushes the piston plate 14 to restore, if the winding coil 20 is energized due to obstruction by the operator, the magnetic attraction generated by the winding coil 20 will cause the piston plate 14 to move downward rapidly, which will also cause the limiting top block 18 to move to the left, so that the buffer chamber 600 is connected to the outside, and the cabinet door 2 is quickly opened under the magnetic force of the winding coil 20, thereby not affecting the operator's maintenance work on the machine inside the cabinet 1.

[0050] Finally, when the restoring spring 12 pushes the piston plate 14 upward through the limit plate 100, the piston plate 14 will be squeezed by the buffer chamber 600 above due to the elastic force of the restoring spring 12, but the elastic force of the restoring spring 12 is smaller than the elastic force of the limit spring 180. Therefore, when the piston plate 14 is pushed upward only by the restoring spring 12, the piston plate 14 can only move slowly upward.

[0051] When the cabinet door 2 needs to be closed quickly, the operator can manually push the cabinet door 2, and by increasing the strength of the restoring spring 12 pushing the piston plate 14, the pressure in the upper buffer chamber 600 overcomes the elastic force of the limit spring 180, and the limit top block 18 is forced to move to the right and compress the limit spring 180 until the ventilation groove 602 and the air inlet groove 601 are connected, and the cabinet door 2 can be quickly closed.

[0052] It is worth mentioning that from Figure 2 , Figure 3 as well as Figure 8 It can be clearly seen that the limiting top block 18 is at a certain distance from the inner top of the buffer tube 6, and the limiting top block 18 is generally located at one-fourth of the length of the buffer tube 6. This design will cause the piston plate 14 to be retracted into the buffer chamber 600. After the piston plate 14 passes over the limiting top block 18, the buffer chamber 600 above the piston plate 14 can only communicate with the outside through the damping groove 140, so that when the piston plate 14 is about to be fully retracted, the movement speed of the connecting rod 10 is reduced, and further, the movement speed of the cabinet door 2 is reduced, thereby realizing the slow closing of the cabinet door 2 and avoiding excessive impact of the cabinet door 2 due to the closing speed being too fast.

[0053] Embodiment 3

[0054] Since a large number of electrical components are working in the cabinet 1, non-operating personnel are generally not allowed to open it. Therefore, in order to improve the safety inside the cabinet 1, the third embodiment is a further improvement on the basis of the second embodiment.

[0055] from Figure 8 It can be clearly seen that the end of the buffer tube 6 is fixedly mounted with a bearing 13, and the inner side of the bearing 13 is fixedly mounted with the outer side of the support head 5, so that the buffer tube 6 can not only deflect with the positioning rod 4 as the central axis, but also rotate on the outer side of the support head 5 through the bearing 13. Figure 8 It can also be seen that the connecting rod 10 passes through the center of the end cover 9. Therefore, when the buffer tube 6 rotates, the end cover 9 can rotate on the outside of the connecting rod 10, thereby ensuring that the connecting rod 10 hinged to the cabinet door 2 can be normally extended / retracted from the buffer cavity 600.

[0056] Combination Figure 2 , Figure 7 as well as Figure 8 As can be seen from the figure, a gear 8 is coaxially fixed to the outside of the buffer tube 6, so that the buffer tube 6 can rotate synchronously with the gear 8. A gear row 11 is fixed on the top of the inner side of the cabinet 1 by bolts, and the gear row 11 is meshed with the gear 8. Figure 7 It can be seen that the shape of the tooth row 11 is arc-shaped. When the buffer tube 6 deflects with the positioning rod 4 as the axis, the meshing between the gear 8 and the tooth row 11 can make the buffer tube 6 rotate synchronously.

[0057] The surface shape of the limiting top block 18 is a right-angled trapezoid. Figure 5 In the figure, the maximum bottom of the limit top block 18 is located at the top. It should be noted that the limit top block 18 can only reciprocate left and right along the central axis of the limit spring 180. For example, the limit top block 18 is positioned and guided by the dovetail groove in the buffer tube 6. The invention is not limited to this. It only needs to realize the directional movement of the limit top block 18. The width of the limit top block 18 is slightly smaller than the groove width of the damping groove 140, so that the limit top block 18 extending into the buffer cavity 600 can pass through the damping groove 140.

[0058] In actual application, when the operator needs to open the cabinet door 2, the operator pulls the cabinet door 2 outward to a specific angle and then maintains the cabinet door 2 at this position. Figure 4 It can be clearly seen that when the cabinet door 2 pulls the piston plate 14 to move outward quickly through the connecting rod 10, the pressure in the buffer chamber 600 above the piston plate 14 decreases, so that the piston plate 14 has a certain downward movement resistance. At this time, the piston plate 14 compresses the detection spring 15 to shorten.

[0059] Combination Figure 7 It can be seen that when the cabinet door 2 deflects outward counterclockwise, it not only stretches the connecting rod 10 outward, but also forces the buffer tube 6 to deflect counterclockwise with the positioning rod 4 as the axis, and during the deflection process, the buffer tube 6 is forced to rotate by the meshing between the gear 8 and the gear row 11. As mentioned above, when the cabinet door 2 rotates to a specific angle, the buffer tube 6 will drive the limit top block 18 to align with the damping groove 140.

[0060] As the piston plate 14 moves toward the limit top block 18, the piston plate 14 compresses the detection spring 15. After the operator stabilizes the cabinet door 2 at a specific angle, the connecting rod 10 stops moving. The damping groove 140 connects the upper buffer chamber 600 with the external air, so that the pressure in the upper buffer chamber 600 is relatively balanced with the outside. Afterwards, the piston plate 14 is forced to push outward under the action of the elastic force of the detection spring 15, so that the piston plate 14 passes over the limit top block 18. Afterwards, the cabinet door 2 is pulled again to fully open the cabinet door 2.

[0061] If the cabinet door 2 is directly pulled outward, the buffer tube 6 will rotate so that the limit top block 18 and the damping groove 140 are offset from each other. Finally, the piston plate 14 that continues to extend outward will be blocked on the upper bottom surface of the limit top block 18, thereby limiting the piston plate 14 from continuing to extend outward. At this time, the cabinet door 2 will not be opened.

[0062] By utilizing the method of implementation three, it can be ensured that when the cabinet door 2 needs to be opened, the cabinet door 2 can be opened by pulling the cabinet door 2 at a specific angle known to the operator, thereby avoiding accidental opening by non-operators, thereby greatly ensuring the safety of the electrical appliances inside the cabinet 1 and non-professionals.

[0063] As an improvement on the security of the third embodiment, refer to Figure 4 and Fig.10 It can be clearly seen that a safety block 141 is symmetrically arranged on one side of the piston plate 14 and below the damping groove 140. The safety block 141 is in the shape of a rectangular parallelepiped. The protruding safety block 141 is used to block the damping groove 140, so that the piston plate 14 cannot rotate during the process of crossing the limit top block 18. This ensures that the limit top block 18 can pass through the damping groove 140 only when the connecting rod 10 stops moving. On the one hand, the cabinet door 2 must be deflected to a specific angle before it can be opened. On the other hand, when the buffer tube 6 rotates by sticking to the bottom of the piston plate 14, the safety block 141 is used to block the limit top block 18 to prevent it from sliding directly into the damping groove 140.

[0064] Embodiment 4

[0065] As a supplement to the third embodiment, in order to make the operator more clearly know the deflection angle of the cabinet door 2, please refer to Figure 1 and Figure 2 It can be clearly seen that an arc-shaped retaining frame 3 located on the outside of the cabinet door 2 is fixedly connected to one side of the cabinet body 1, and the center line of the arc-shaped retaining frame 3 coincides with the rotation axis of the cabinet door 2. When the cabinet door 2 is pulled outward, the arc-shaped retaining frame 3 is used to block the cabinet door 2. When the cabinet door 2 is pulled outward but has not passed the limit top block 18, outsiders cannot know the situation inside the cabinet body 1, thereby further protecting the electrical appliances in the cabinet body 1.

[0066] At the same time, an indicator line 300 is opened on the inner side of the arc-shaped baffle frame 3. When the cabinet door 2 is pulled outward along the inner side of the arc-shaped baffle frame 3, the operator only needs to check the indicator line 300 to know the deflection angle of the cabinet door 2, so as to ensure that the outward deflection angle of the cabinet door 2 is the specific rotation angle mentioned in Example 3.

[0067] Embodiment 5

[0068] Further improvements based on the fourth embodiment, refer to Figure 2 , Figure 8 and Fig. 9 It can be clearly seen that the outside of the buffer tube 6 is provided with a counterweight ball 7 fastened by a clamp. Since the gravity of the counterweight ball 7 is always downward, when the gear 8 is disengaged from the gear row 11, the counterweight ball 7 fixed to the buffer tube 6 is always vertically downward.

[0069] In actual application, when the cabinet door 2 reaches the limit of opening / closing deflection, the gear row 11 will not contact the gear 8, so that the buffer tube 6 automatically resets after moving to the limit position of the cabinet door 2 through the intervention of the weight ball 7. This reset has two advantages:

[0070] First, when the cabinet door 2 is closed, the buffer tube 6 is rotated and reset by the vertical downward counterweight ball 7. This method can ensure that when the cabinet door 2 is deflected outward to a specific angle, the meshing between the gear 8 and the tooth row 11 can ensure the position alignment of the limit top block 18 and the damping groove 140, thereby avoiding the position offset between the limit top block 18 and the damping groove 140 due to other reasons such as meshing misalignment between the tooth row 11 and the gear 8. After each closing of the cabinet door 2 to the limit, the buffer tube 6 can reset itself once, which greatly increases the stability of the position alignment between the limit top block 18 and the damping groove 140.

[0071] Second, when the cabinet door 2 is opened outward and moves to the limit, the cabinet door 2 is fully opened. At this time, the buffer tube 6 will rotate and reset under the action of the gravity of the counterweight ball 7. Afterwards, when the cabinet door 2 is gradually closed by the elastic force of the restoring spring 12, the buffer tube 6 is reset and rotated, causing the restoring spring 12 to push the piston plate 14 to the position of the limit top block 18. The buffer tube 6 after rotation will not align the limit top block 18 with the damping groove 140. Therefore, the piston plate 14 will always be limited and blocked by the limit top block 18 during the retreat process.

[0072] As described in the second embodiment, when the start switch 19 is turned on, the coil switch 17 starts to work, and when the restoring spring 12 pushes the piston plate 14 to reset through the limit plate 100, if the operator does not touch the cabinet door 2 during the reset process, the piston plate 14 is continuously pushed by the restoring spring 12 until the piston plate 14 is pushed onto the limit top block 18. At this time, the limit plate 100 is still attached to the piston plate 14 by the elastic force of the restoring spring 12. The switching disk 101 elastically stretches the detection spring 15 while switching the contact rod 102 away from the coil switch 17. At this time, the cabinet door 2 is in a pre-closed state. Due to the existence of the arc-shaped retaining frame 3, although the piston plate 14 does not cross the limit top block 18, it is blocked by the arc-shaped retaining frame 3 and still protects the interior of the cabinet body 1. This method can prevent the construction personnel from needing to leave in the middle of use. It can not only close the cabinet door 2 to protect the interior of the cabinet body 1, but also provide convenience for the next quick opening of the cabinet door 2.

[0073] If the subsequent operator needs to open the cabinet door 2, he only needs to pull the cabinet door 2 outward, so that the switching disk 101 pushes the switching contact rod 102 to contact the coil switch 17. Since the coil switch 17 is in a working state here, under the action of the magnetic force of the winding coil 20, the cabinet door 2 is forced to open quickly by attracting the piston plate 14. At this time, the opening of the cabinet door 2 depends on the magnetic force generated by the winding coil 20. Therefore, the operator does not need to open it a second time with great effort.

[0074] If the operator has finished the inspection and needs to completely close the cabinet door 2, he only needs to push the cabinet door 2 so that the connecting rod 10 pushes the piston plate 14 to have the power to cross the limit top block 18. Specifically, Figure 4 and Figure 5 It can be seen that when the piston plate 14 moves upward, the outer side of the piston plate 14 will hit the inclined surface of the limit top block 18. When an outsider applies a thrust to the piston plate 14, the piston plate 14 can overcome the elastic force of the limit spring 180, thereby closing the cabinet door 2 and safely retracting it. When the cabinet door 2 needs to be opened later, it is still necessary to use the content described in Example 3 to open the cabinet door 2 by pulling it outward at a specific angle.

Claims

1. A reset component for a switch cabinet, characterized in that: include: The cabinet body (1) is hinged to the cabinet door (2), and a positioning rod (4) is fixedly installed on the top of the inner side; A support head (5) is mounted on the bottom of the positioning rod (4), a buffer tube (6) is mounted on the outside, a buffer chamber (600) is provided inside the buffer tube (6), a cut-off switch (16) is fixedly connected to the top of the inner side of the buffer tube (6), and a start switch (19) is fixedly connected to the bottom of the inner side of the buffer tube (6); A piston plate (14) is movably mounted inside the buffer tube (6), a damping groove (140) is provided on the outside, and a coil switch (17) is fixedly connected on the inside; A connecting rod (10) is sleeved on the middle part of the piston plate (14), one end of which is fixedly connected to the switching disk (101) and the other end of which is hinged to one side of the cabinet door (2); a switching contact rod (102) is fixedly connected to the end of the switching disk (101), and the piston plate (14) and the switching disk (101) are connected via a detection spring (15); An end cover (9) is installed at the end of the buffer tube (6) and has an exhaust hole (900) on its surface; A limit plate (100) is fixedly connected to the side of the connecting rod (10), and a restoring spring (12) is connected between the limit plate (100) and the end cover (9); The winding coil (20) is fixed to the end of the end cover (9) and generates magnetic attraction to the piston plate (14) when energized.

2. The reset assembly of the switch cabinet according to claim 1, characterized in that: A limit motion top block (18) is movably installed inside the buffer tube (6), one end of the limit motion top block (18) is fixedly connected to a limit motion spring (180), one end of the limit motion spring (180) is fixedly connected to the inside of the buffer tube (6), a ventilation groove (602) and an air intake groove (601) located below the limit motion top block (18) are provided inside the buffer tube (6), and the ventilation groove (602) and the air intake groove (601) are switched on and off by the limit motion top block (18), the ventilation groove (602) and the buffer chamber (600) are in communication, and the air intake groove (601) is in communication with the outside.

3. The reset assembly of the switch cabinet according to claim 2, characterized in that: The elastic force of the limiting spring (180) is greater than the elastic force of the restoring spring (12).

4. The reset assembly of the switch cabinet according to claim 2, characterized in that: A spacing is left between the limiting top block (18) and the inner top of the buffer tube (6), and the limiting top block (18) is located at one quarter of the length of the buffer tube (6).

5. The reset assembly of the switch cabinet according to claim 2, characterized in that: A bearing (13) is fixedly mounted on the end of the buffer tube (6), and the inner side of the bearing (13) is fixedly mounted on the outer side of the support head (5). A gear (8) is fixed on the outer side of the buffer tube (6), and a gear row (11) is fixed on the inner top of the cabinet (1), and the gear row (11) is meshed with the gear (8).

6. The reset assembly of the switch cabinet according to claim 5, characterized in that: The width of the limiting top block (18) is smaller than the groove width of the damping groove (140), and the surface shape of the limiting top block (18) is a right-angle trapezoid.

7. The reset assembly of the switch cabinet according to claim 5, characterized in that: A safety stopper (141) is arranged on one side of the piston plate (14).

8. The reset assembly of the switch cabinet according to claim 5, characterized in that: A weight ball (7) is fixedly connected to the outer side of the buffer tube (6).

9. A switch cabinet for a switch cabinet reset assembly according to any one of claims 1 to 8, characterized in that: An arc-shaped retaining frame (3) is fixedly connected to one side of the cabinet (1), and an indicator line (300) is provided on the inner side of the arc-shaped retaining frame (3).

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