Emergency opening device of high-voltage switch cabinet

Abstract

The invention relates to an emergency brake separating device of a high-voltage switch cabinet, which belongs to the technical field of high-voltage switch cabinets, and comprises a fixing mechanism used for being fixed on a cabinet door of the switch cabinet; the ejector rod mechanism is fixed on the fixing mechanism and is used for abutting against a switch cabinet emergency opening button; the driving mechanism is used for driving the ejector rod mechanism to act; the driving mechanism is fixed on the distance adjusting mechanism, and the distance adjusting mechanism is connected with the fixing mechanism in a sliding mode; the positioning mechanism is used for positioning the position of the fixing mechanism; and the control mechanism is electrically connected with the driving mechanism and used for controlling the driving mechanism to act. The device is provided with the push rod mechanism, and the push rod mechanism can accurately abut against a switch cabinet emergency opening button, thereby achieving the quick opening. The problems of low efficiency, complex operation and the like in the emergency opening operation of the high-voltage switch cabinet are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage switch cabinets, and in particular relates to an emergency tripping device for a high-voltage switch cabinet. Background Art

[0002] When a high-voltage switch cabinet fails, the substation operator needs to go to the site for emergency tripping. The current measure is to manually force the tripping through the emergency trip button on the switch cabinet door. However, the high-voltage switch cabinet circuit breaker is in a live state at this time, and the forced tripping of the circuit breaker may have a certain risk of failure and cause hidden safety hazards to the operator. In order to eliminate the risk of personal injury, the busbar is generally shut down before the tripping operation. This not only expands the scope of the power outage and prolongs the power outage time, but also increases the workload of the dispatching, operation, and maintenance personnel, resulting in a waste of economic and human resources. Therefore, a high-voltage switch cabinet emergency tripping device is continuously developed, which can realize the remote control tripping function of the switch cabinet on site, reduce the number of times the busbar cannot be tripped due to the switch cabinet, and ensure the safety of personnel, power grids and equipment at the operation site. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a high-voltage switch cabinet emergency opening device to solve the drawback of the inconvenience of the switch cabinet emergency opening in the prior art.

[0004] To solve the above problems, the technical solution adopted by the present invention is:

[0005] A high-voltage switch cabinet emergency trip device comprises a fixing mechanism for fixing on a switch cabinet door; a push rod mechanism, the push rod mechanism is fixed on the fixing mechanism and is used to push the switch cabinet emergency trip button; a driving mechanism, the driving mechanism is used to drive the push rod mechanism to operate; a distance adjustment mechanism, the driving mechanism is fixed on the distance adjustment mechanism, the distance adjustment mechanism is slidably connected to the fixing mechanism; a positioning mechanism, the positioning knob is used to locate the position; and a control mechanism, the control mechanism is electrically connected to the driving mechanism and is used to control the operation of the driving mechanism.

[0006] Furthermore, the fixing mechanism includes a frame and a base frame, the frame is movably connected to the distance adjustment mechanism, the base frame is vertically fixedly connected to the frame, and a magnetic attraction component is fixedly provided on the base frame.

[0007] Furthermore, the push rod mechanism includes a rod sleeve and a guide rod, the rod sleeve is axially provided with a slide groove, the guide rod slides freely in the slide groove, a boss is provided at the lower part of the guide rod, a square groove is provided on the slide groove, the length of the square groove is greater than the length of the boss, the boss slides up and down in the square groove, a flat groove is provided at the lower end of the rod sleeve, a fixing hole is provided in the vertical direction of the flat groove, the flat groove is plug-fitted and connected with the driving mechanism, a spring is provided in the slide groove, and the spring is sleeved on the lower part of the guide rod.

[0008] Furthermore, the rod sleeve includes a rod shell, an end cover and a side cover, and the end cover and the side cover are respectively fixedly connected to the rod shell by bolts.

[0009] Furthermore, a detection switch is provided at the lower end of the square groove, and the detection switch is electrically connected to the driving mechanism.

[0010] Furthermore, the driving mechanism is an electric telescopic cylinder.

[0011] Furthermore, the positioning mechanism is a knob magnet seat.

[0012] Furthermore, the distance adjustment mechanism includes an electric cylinder fixing rod and an adjusting knob. The electric cylinder fixing rod is horizontally arranged in the frame, and the electric cylinder fixing rod is slidably connected to the frame. A T-slot is arranged on the inner side of the frame. Slide plates are respectively arranged at both ends of the electric cylinder fixing rod. The slide plates slide freely in the T-slots. An adjusting knob is arranged on the slide plate, and the adjusting knob is threadedly connected to the slide plate. The end of the adjusting knob is abutted against the T-slot.

[0013] Furthermore, the control mechanism includes a control box and a remote controller, the remote controller is communicatively connected to the control box, and a forward button and a reverse button are provided on the remote controller; the control box is electrically connected to the driving mechanism, a battery is provided in the control box, and a magnet is provided on the control box body; the control box and the remote controller are respectively provided with power indicator lights.

[0014] The present invention also provides a technical solution for a high-voltage switch cabinet emergency opening method, comprising the following steps:

[0015] Step s1, adsorbing the opening device to the high-voltage switch cabinet door through a magnetic attraction component, adsorbing the control box to the high-voltage switch cabinet door, and connecting the power line between the control box and the drive mechanism;

[0016] Step s2, loosen the adjustment knob, slide the electric cylinder fixing rod in the frame, adjust the distance between the electric cylinder fixing rod and the cabinet door, make the distance between the top rod mechanism and the emergency opening button on the cabinet door appropriate, and then tighten the adjustment knob;

[0017] Step s3, press the forward button on the remote control, the push rod mechanism pushes forward under the action of the driving mechanism, and when the push rod mechanism contacts the emergency opening button switch, it continues to push forward until the push rod mechanism presses the emergency opening button to the opening position;

[0018] Step s4, when the push rod mechanism presses the emergency opening button to the opening position, the push rod mechanism does not continue to push out, and under the action of the driving mechanism, the guide rod and the rod sleeve slide relative to each other, and when the boss contacts the detection switch, the detection switch is actuated to control the driving mechanism to stop moving forward;

[0019] Step s4, when the driving mechanism stops moving forward, the emergency opening operation has been completed, and the back button on the remote control is pressed to restore the driving mechanism to the starting position.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides an emergency tripping device for a high-voltage switch cabinet. The device of the present invention is provided with a push rod mechanism, which can accurately push the emergency tripping button of the switch cabinet to achieve rapid tripping; it effectively solves the problems of low efficiency and complex operation in the emergency tripping operation of the high-voltage switch cabinet.

[0022] 2. The present invention provides an emergency tripping device for a high-voltage switch cabinet. The device of the present invention is provided with a control mechanism that can remotely control the action of a driving mechanism to achieve remote emergency tripping, thereby greatly improving the safety and convenience of operation.

[0023] 3. The present invention provides an emergency tripping device for a high-voltage switch cabinet. The device of the present invention is provided with a distance adjustment mechanism, so that the tripping device can adjust the distance between the device and the switch cabinet door according to actual needs, thereby improving the applicability and flexibility of the tripping device. At the same time, the driving mechanism adopts an electric telescopic cylinder, which has the advantages of fast response speed, large output force, high reliability, etc., further improving the performance of the tripping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0025] Figure 2 It is a front structural schematic diagram of the device of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the ejector mechanism of the device of the present invention;

[0027] Figure 4 It is a front structural schematic diagram of the push rod mechanism of the device of the present invention.

[0028] In the figure:

[0029] 1. Fixing mechanism, 11. Frame, 12. Base frame, 13. Magnetic component, 14. T-slot,

[0030] 2. Push rod mechanism, 21. Rod sleeve, 211. Rod housing, 212. End cover, 213. Side cover, 22. Guide rod, 23. Slide groove, 24. Boss, 25. Square groove, 26. Flat groove, 27. Spring, 28. Fixing hole, 29. Detection switch,

[0031] 3. Driving mechanism,

[0032] 4. Distance adjustment mechanism, 41. Electric cylinder fixing rod, 42. Adjustment knob, 43. Slide plate,

[0033] 5. Positioning mechanism,

[0034] 6. control mechanism, 61. control box, 62. remote controller, 63. power indicator light. DETAILED DESCRIPTION

[0035] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "first", "second", "middle end" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the present invention.

[0037] like Figure 1 to Figure 4 As shown, the present invention provides an embodiment of an emergency tripping device for a high-voltage switch cabinet, including a fixing mechanism 1, which is used to be fixed on the switch cabinet door; in the embodiment of the present invention, the fixing mechanism 1 is made of high-strength hard material to firmly fix the device on the switch cabinet door. A push rod mechanism 2, the push rod mechanism 2 is fixed on the fixing mechanism 1, and is used to top the emergency tripping button of the switch cabinet; a driving mechanism 3, which can use a motor with forward and reverse functions, and the motor speed is moderate, and the torque can press the operating rod into the tripping button to realize the tripping function. The driving mechanism 3 is used to drive the push rod mechanism 2 to move; a distance adjustment mechanism 4, the driving mechanism 3 is fixed on the distance adjustment mechanism 4, and the distance adjustment mechanism 4 is slidably connected to the fixing mechanism 1; a positioning mechanism 5, which is used to locate the position of the switch cabinet knob; a control mechanism 6, the control mechanism 6 is electrically connected to the driving mechanism 3, and is used to control the action of the driving mechanism 3. Because the operator cannot operate the device in front of the device, the device of the present invention needs to be remotely controlled. The operator should ensure that the device motor can be remotely operated at least 5 meters away, and the device should be portable and powered by a battery. The device of the embodiment of the present invention is provided with a push rod mechanism, which can accurately push the emergency opening button of the switch cabinet to achieve rapid opening, effectively solving the problems of low efficiency and complicated operation in the emergency opening operation of the high-voltage switch cabinet. The device of the embodiment of the present invention is provided with a control mechanism, which can remotely control the action of the driving mechanism to achieve remote emergency opening, greatly improving the safety and convenience of operation.

[0038] The fixing mechanism 1 includes a frame 11 and a chassis 12. The frame 11 is movably connected to the distance adjustment mechanism 4. The frame 11 is a C-shaped frame. The distance adjustment mechanism 4 is arranged inside the frame 11. The driving mechanism 3 is fixed on the distance adjustment mechanism 4. The distance adjustment mechanism 4 can adjust the distance for the perpendicular fixed connection between the chassis 12 and the frame 11. A magnetic attraction component 13 is fixedly arranged on the chassis 12. The distance adjustment mechanism 4 includes an electric cylinder fixing rod 41 and an adjustment knob 42. The electric cylinder fixing rod 41 is horizontally arranged inside the frame 11 and is slidably connected to the frame 11. A T-shaped groove 14 is arranged inside the frame 11. Slide plates 43 are respectively arranged at both ends of the electric cylinder fixing rod 41. The slide plates 43 are L-shaped plates. One end of the slide plate 43 is fixedly connected to the electric cylinder fixing rod 41. The other L-shaped end of the slide plate 43 is arranged in the T-shaped groove. The slide plate 43 freely slides in the T-shaped groove 14. The adjustment knob 42 is arranged on the slide plate 43 and is threadedly connected to the slide plate 43. The end of the adjustment knob 42 is in abutting connection with the T-shaped groove 14. In the embodiment of the present invention, both the frame 11 and the chassis 12 are made of 20*20 aluminum alloy profiles, which have the characteristics of high strength and light weight. In the embodiment of the present invention, the chassis 12 is in close contact with the switch cabinet door. A magnetic attraction component 13 is arranged at the end of the chassis 12 for firmly fixing the device on the switch cabinet door so that the position of the device will not change due to force when the emergency trip button is pressed. In the embodiment of the device of the present invention, the design of the distance adjustment mechanism is provided, so that the trip device can adjust the distance from the switch cabinet door according to actual needs, improving the applicability and flexibility of the trip device. At the same time, the driving mechanism adopts an electric telescopic cylinder, which has the advantages of fast response speed, large output force, high reliability, etc., further improving the performance of the trip device.

[0039] The push rod mechanism 2 includes a rod sleeve 21 and a guide rod 22. The rod sleeve 21 is provided with a slide groove 23 in the axial direction. The guide rod 22 slides freely in the slide groove 23. A boss 24 is provided at the lower part of the guide rod 22. A square groove 25 is provided on the slide groove 23. The length of the square groove 25 is greater than that of the boss 24. The boss 24 slides up and down in the square groove 25. A flat groove 26 is provided at the lower end of the rod sleeve 21. A fixing hole 28 is provided in the vertical direction of the flat groove 26. The flat groove 26 is plug-fittedly connected with the driving mechanism 3. A spring 27 is provided in the slide groove 23. The spring 27 is sleeved on the lower part of the guide rod 22. A detection switch 29 is provided at the lower end of the square groove 25. The detection switch 29 is electrically connected with the driving mechanism 3. In the embodiment of the present invention, the push rod mechanism 2 is connected to the driving mechanism 3, and the driving mechanism 3 is an electric telescopic mechanism. The free end of the driving mechanism 3 is inserted into the flat groove 26, and the driving mechanism 3 and the push rod mechanism 2 are fixedly connected together through the fixing hole 28. When the driving mechanism 3 is extended or retracted, the push rod mechanism 2 is driven forward or backward. In the embodiment of the present invention, the guide rod 22 is free to move in the slide groove 23. Due to the restrictions of the square groove 25 and the boss 24, the guide rod 22 is restricted to move within a certain range. Since the length of the square groove 25 is greater than the length of the boss 24, the range of movement of the guide rod 22 is the difference between the length of the square groove 25 and the length of the boss 24. In the embodiment of the present invention, the spring 27 is sleeved under the guide rod 22, one end of the spring 27 abuts against the bottom plate of the slide slot 23, and the other end is fixedly connected to the end of the guide rod 22. When the push rod mechanism 2 is pushed forward under the action of the driving mechanism 3, the spring 27 pushes the guide rod 22 forward. The elastic coefficient value of the spring 27 is set within a certain range. In the embodiment of the present invention, the elastic force of the spring 27 is 25 Newtons. If the pressure exceeds 25 Newtons, the spring will be compressed. If the spring pressure value is less than 25 Newtons, the spring 27 will not be compressed. The spring 27 applies pressure to the guide rod 22, so that when the guide rod 22 is pushed forward with the driving mechanism 3, it is used to press the emergency opening button and push the emergency opening button to the opening position. When the emergency trip button is pushed to the trip position, the push rod 22 can no longer move forward. Under the continuous push of the driving mechanism 3, the spring pressure value is greater than 25 Newtons, and it is compressed, and the boss 24 and the rod sleeve 21 move relative to each other. The boss 24 approaches and contacts the detection switch 29, and the detection switch 29 controls the driving mechanism 3 to stop pushing out, which is used to complete the emergency trip button to complete the trip operation, and gives an action signal to stop pressing the trip button and retract the push rod 22. Under the action of the spring 27, the emergency trip button can also be protected from damage.

[0040] The rod sleeve 21 includes a rod housing 211 , an end cover 212 and a side cover 213 . The end cover 212 and the side cover 213 are respectively fixedly connected to the rod housing 211 by bolts.

[0041] The driving mechanism 3 is an electric telescopic cylinder.

[0042] The positioning mechanism 5 is a knob magnet. In the embodiment of the present invention, the positioning mechanism 5 is a strong magnetic knob magnet seat, which is used to locate the position of the switch cabinet door knob. When the emergency opening button is pressed urgently, the knob on the switch cabinet door may rotate or change, and it needs to be fixed manually, which poses an unsafe hazard. There are also situations where other tools are used to limit and fix. In the embodiment of the present invention, a strong magnet seat is provided. When the emergency opening button is pressed, the positioning mechanism 5 is clamped on the knob switch, and the knob switch and the switch cabinet door are attracted together by the strong magnetism of the positioning mechanism 5, and the knob switch is prevented from rotating. When the opening operation is completed, the positioning mechanism 5 is demagnetized by the magnetic knob of the positioning mechanism 5, so that the positioning mechanism 5 can be easily retracted from the switch cabinet door.

[0043] The control mechanism 6 includes a control box 61 and a remote controller 62. The remote controller 62 is connected to the control box 61 in communication. The remote controller 62 is provided with a forward button and a backward button. The control box 61 is electrically connected to the drive mechanism 3. The control box 61 is provided with a battery. The control box 61 is provided with a magnet. The control box 61 and the remote controller 62 are provided with a power indicator light 63, respectively. In the embodiment of the present invention, the control box 61 includes a control circuit board and a battery. The control circuit board is connected to the drive mechanism 3 and the remote controller 62 to output power to the drive mechanism 3. In the embodiment of the present invention, the control box 61 is provided with a magnet, so that the control box 61 can be conveniently adsorbed onto the switch cabinet door. In the embodiment of the present invention, the communication method between the remote controller 62 and the control box 61 is a wireless communication method, and the communication distance is not less than 5m. Bluetooth communication, infrared communication, and micro-power wireless module can be used for communication to realize remote remote control of the switch opening operation.

[0044] The present invention also provides an embodiment of a high-voltage switch cabinet emergency opening method, comprising the following steps:

[0045] Step s1, adsorb the opening device to the high-voltage switch cabinet door through the magnetic attraction component 13, adsorb the control box 61 to the high-voltage switch cabinet door, and connect the power line between the control box 61 and the drive mechanism 3;

[0046] Step s2, loosen the adjusting knob 42, slide the electric cylinder fixing rod 41 in the frame 11, adjust the distance between the electric cylinder fixing rod 41 and the cabinet door, so that the distance between the top rod mechanism 2 and the emergency opening button on the cabinet door is appropriate, and then tighten the adjusting knob 42;

[0047] Step s3, press the forward button on the remote controller 62, the push rod mechanism 2 is pushed forward under the action of the driving mechanism 3, and when the push rod mechanism 2 contacts the emergency opening button switch, it continues to be pushed forward until the push rod mechanism 2 presses the emergency opening button to the opening position;

[0048] Step s4, when the push rod mechanism 2 presses the emergency opening button to the opening position, the push rod mechanism 2 does not continue to push out, and under the action of the driving mechanism 3, the guide rod 22 and the rod sleeve 21 slide relative to each other, and when the boss 24 contacts the detection switch 29, the detection switch 29 is actuated to control the driving mechanism 3 to stop moving forward;

[0049] Step s4, when the driving mechanism 3 stops moving forward, the emergency opening operation has been completed, and the back button on the remote controller 62 is pressed to restore the driving mechanism 3 to the starting position.

[0050] Of course, the above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A high-voltage switch cabinet emergency tripping device, characterized in that: It comprises a fixing mechanism (1) for fixing on a switch cabinet door; A push rod mechanism (2), the push rod mechanism (2) is fixed on the fixing mechanism (1) and is used for pushing the emergency opening button of the switch cabinet; A driving mechanism (3), wherein the driving mechanism (3) is used to drive the push rod mechanism (2) to move; A distance adjusting mechanism (4), wherein the driving mechanism (3) is fixed on the distance adjusting mechanism (4), and the distance adjusting mechanism (4) is slidably connected to the fixing mechanism (1); A positioning mechanism (5), used for positioning the knob; A control mechanism (6), wherein the control mechanism (6) is electrically connected to the driving mechanism (3) and is used to control the action of the driving mechanism (3).

2. A high-voltage switch cabinet emergency tripping device according to claim 1, characterized in that: The fixing mechanism (1) comprises a frame (11) and a base frame (12); the frame (11) is movably connected to the distance adjustment mechanism (4); the base frame (12) is vertically fixedly connected to the frame (11); and a magnetic attraction component (13) is fixedly provided on the base frame (12).

3. The high-voltage switch cabinet emergency tripping device according to claim 1 is characterized in that: The push rod mechanism (2) comprises a rod sleeve (21) and a guide rod (22). The rod sleeve (21) is axially provided with a slide groove (23). The guide rod (22) slides freely in the slide groove (23). A boss (24) is provided at the lower part of the guide rod (22). A square groove (25) is provided on the slide groove (23). The length of the square groove (25) is greater than the length of the boss (24). The boss (24) slides up and down in the square groove (25). A flat groove (26) is provided at the lower end of the rod sleeve (21). A fixing hole (28) is provided in the vertical direction of the flat groove (26). The flat groove (26) is plug-fittedly connected to the driving mechanism (3). A spring (27) is provided in the slide groove (23). The spring (27) is sleeved on the lower part of the guide rod (22).

4. A high-voltage switch cabinet emergency tripping device according to claim 3, characterized in that: The rod sleeve (21) comprises a rod shell (211), an end cover (212) and a side cover (213); the end cover (212) and the side cover (213) are respectively fixedly connected to the rod shell (211) by bolts.

5. The high-voltage switch cabinet emergency tripping device according to claim 3 is characterized in that: A detection switch (29) is provided at the lower end of the square groove (25), and the detection switch (29) is electrically connected to the driving mechanism (3).

6. The high-voltage switch cabinet emergency tripping device according to claim 3 is characterized in that: The driving mechanism (3) is an electric telescopic cylinder.

7. The high-voltage switch cabinet emergency tripping device according to claim 1 is characterized in that: The positioning mechanism (5) is a knob magnet.

8. The high-voltage switch cabinet emergency tripping device according to claim 2 is characterized in that: The distance adjustment mechanism (4) comprises an electric cylinder fixing rod (41) and an adjusting knob (42); the electric cylinder fixing rod (41) is transversely arranged in the frame (11); the electric cylinder fixing rod (41) is slidably connected to the frame (11); a T-shaped slot (14) is arranged on the inner side of the frame (11); slide plates (43) are respectively arranged at both ends of the electric cylinder fixing rod (41); the slide plates (43) slide freely in the T-shaped slot (14); the adjusting knob (42) is arranged on the slide plate (43); the adjusting knob (42) is threadedly connected to the slide plate (43); and the end of the adjusting knob (42) is abutted against the T-shaped slot (14).

9. The high-voltage switch cabinet emergency tripping device according to claim 1, characterized in that: The control mechanism (6) comprises a control box (61) and a remote controller (62); the remote controller (62) is communicatively connected with the control box (61); a forward button and a reverse button are provided on the remote controller (62); the control box (61) is electrically connected with the driving mechanism (3); a storage battery is provided in the control box (61); a magnet is provided on the body of the control box (61); and power indicator lights (63) are provided on the control box (61) and the remote controller (62), respectively.

10. A method for emergency opening of a high-voltage switch cabinet, characterized in that: The following steps are involved: Step s1, adsorbing the opening device onto the high-voltage switch cabinet door through the magnetic attraction component (13), adsorbing the control box (61) onto the high-voltage switch cabinet door, and connecting the power line between the control box (61) and the driving mechanism (3); Step s2, loosen the adjusting knob (42), slide the electric cylinder fixing rod (41) in the frame (11), adjust the distance between the electric cylinder fixing rod (41) and the cabinet door, so that the distance between the push rod mechanism (2) and the emergency opening button on the cabinet door is appropriate, and then tighten the adjusting knob (42); Step s3, pressing the forward button on the remote controller (62), the push rod mechanism (2) is pushed forward under the action of the driving mechanism (3), and when the push rod mechanism (2) contacts the emergency opening button switch, it continues to be pushed forward until the push rod mechanism (2) presses the emergency opening button to the opening position; Step s4, when the push rod mechanism (2) presses the emergency opening button to the opening position, the push rod mechanism (2) no longer continues to push out, and under the action of the driving mechanism (3), relative sliding occurs between the guide rod (22) and the rod sleeve (21), and when the boss (24) contacts the detection switch (29), the detection switch (29) is actuated to control the driving mechanism (3) to stop moving forward; Step s4, when the driving mechanism (3) stops moving forward, the emergency opening operation has been completed, and the back button on the remote control (62) is pressed to restore the driving mechanism (3) to the starting position.

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