Safety protection device of power switch cabinet

Abstract

The invention relates to the field of switch cabinets, in particular to a power switch cabinet safety protection device which comprises a switch cabinet box body, a ventilation filter plate is fixedly connected to the lower portion of the left side of the switch cabinet box body, and an air flow guide fan is fixedly connected to the upper portion of the right side of the switch cabinet box body. The safety protection device of the power switch cabinet is composed of an intermittent transmission mechanism and a cleaning and sealing mechanism. When air in the switch cabinet box body flows, the intermittent transmission mechanism periodically drives the cleaning and sealing mechanism to clean the surface of the smoke sensor in the audible and visual alarm, so that the sensitivity of the smoke sensor in the long-term use process is ensured; when short circuit and fire occur in the switch cabinet box body, the cleaning and sealing mechanism is driven to operate in the starting process of the aerosol fire extinguisher, so that five cleaning plates on the cleaning and sealing mechanism move in a gathering trend to shield and protect the position of the smoke sensor, and the situation that an audible and visual alarm is damaged and cannot give an alarm in time is avoided.

Description

Technical Field

[0001] The present invention relates to the field of switch cabinets, and specifically to a safety protection device for a power switch cabinet. Background Art

[0002] A power switch cabinet is an important electrical equipment for opening, closing, controlling and protecting in a power system. Usually, in order to ensure the safety performance during the use of the power switch cabinet, a fire extinguishing device and an audible and visual alarm device are provided inside the power switch cabinet. When a fire occurs due to a short circuit during the use of the power switch cabinet, the fire can be extinguished and an alarm can be given in time.

[0003] The existing patent (Publication No.: CN111817157B) discloses a power switch cabinet, which includes a cabinet body. There is a placement cavity with an opening forward inside the cabinet body, and a partition is provided inside the placement cavity. In the process of implementing this solution, the inventors found that the following problems in the prior art have not been well solved: 1. In order to ensure that the audible and visual alarm device of the power switch cabinet can be started in time during use, an air guide fan is provided inside the power switch cabinet. When a fire occurs, the smoke is transmitted to the position of the audible and visual alarm device in time. Due to the flow of air, dust will adhere to the surface of the sensor of the audible and visual alarm device, affecting the sensitivity of the alarm; 2. When a fire occurs inside the power switch cabinet, the fire extinguishing device will be started to extinguish the fire, but the fire extinguishing operation, a large amount of smoke and flames will enter the position of the sensor of the audible and visual alarm device, damaging the audible and visual alarm and affecting its use. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety protection device for a power switch cabinet to solve the problems proposed in the above background art: 1. During the use of the audible and visual alarm protection device of some existing power switch cabinets, it is difficult to clean the dust on the surface of the sensor; 2. During the use of the audible and visual alarm protection device of some existing power switch cabinets, it is difficult to achieve automatic protection in case of a fire. To achieve the above purpose, the present invention provides the following technical solution: A safety protection device for a power switch cabinet, including:

[0005] A switch cabinet box body, a ventilation filter plate is fixedly connected to the lower part on the left side of the switch cabinet box body, an air guide fan is fixedly connected to the upper part on the right side of the switch cabinet box body, and an audible and visual alarm is fixedly connected to the right side of the switch cabinet box body;

[0006] It further includes:

[0007] An intermittent transmission mechanism, the intermittent transmission mechanism is movably installed between the air guide fan and the audible and visual alarm, and a cleaning and sealing mechanism cooperating with the intermittent transmission mechanism is movably installed at the left end of the audible and visual alarm, and the cleaning and sealing mechanism is driven by the intermittent transmission mechanism to operate periodically.

[0008] Preferably, a smoke sensor cooperating with the cleaning and sealing mechanism is fixedly connected inside the sound and light alarm, and a locking mechanism cooperating with the cleaning and sealing mechanism is movably installed on the surface of the sound and light alarm;

[0009] The locking mechanism includes a cushion block fixedly connected to the surface of the sound and light alarm. A Y-shaped limiting rod is vertically slidably connected inside the cushion block. The top of the Y-shaped limiting rod abuts against the surface of the cleaning and sealing mechanism, and a limiting spring is movably connected between the middle of the Y-shaped limiting rod and the top of the cushion block.

[0010] Preferably, the intermittent transmission mechanism includes a semi-gear rod. The upper end of the semi-gear rod is fixedly connected to the rotating end of the air guide fan. A transmission ring is rotatably connected to the middle of the sound and light alarm. An end face gear ring is fixedly sleeved on the surface of the transmission ring. The right side of the end face gear ring meshes and drives with the surface of the semi-gear rod. A wedge block cooperating with the cleaning and sealing mechanism is fixedly connected to the outer wall of the transmission ring.

[0011] Preferably, four wedge blocks are provided, and the four wedge blocks are fixedly connected to the outer wall of the transmission ring at equal intervals;

[0012] A one-way bearing is fixedly connected between the inner ring of the transmission ring and the outer ring of the sound and light alarm.

[0013] Preferably, the cleaning and sealing mechanism includes an adjusting ring rotatably connected to the left end of the sound and light alarm. Five arc-shaped rods are circumferentially and equally spaced and hinged to the inner ring of the adjusting ring. Five cleaning plates are circumferentially and equally spaced and hinged to the left end of the sound and light alarm. The five cleaning plates correspond to the five arc-shaped rods one by one. The end of the arc-shaped rod away from the adjusting ring is hinged to the surface of the corresponding cleaning plate. The side of the cleaning plate away from the arc-shaped rod abuts against the surface of the smoke sensor;

[0014] A moving ring is movably sleeved on the outer wall of the adjusting ring. Moving rods are fixedly connected to the top and bottom of the moving ring. One end of the moving rod movably penetrates through the surface of the sound and light alarm. A return spring is movably sleeved on the middle of the moving rod. An adjusting rod cooperating with the wedge block is fixedly connected to the right end of the moving rod. A ring groove cooperating with the Y-shaped limiting rod is formed on the surface of the moving rod;

[0015] Ball head pressing rods are symmetrically and fixedly connected to the left side of the moving ring. Slide pins are symmetrically and fixedly connected to the right side of the moving ring. Arc-shaped sliding grooves are symmetrically formed on the surface of the adjusting ring. The two slide pins are respectively slidably connected inside the two arc-shaped sliding grooves;

[0016] An aerosol fire extinguisher cooperating with the ball head pressing rod is fixedly connected to the inner top surface of the switch cabinet box body, and the aerosol fire extinguisher is electrically connected to the sound and light alarm.

[0017] Preferably, the distance between the two ends of the arc-shaped chute is set to 1.2 times the width of the wedge-shaped block;

[0018] One end of the adjusting rod close to the wedge-shaped block is set to be spherical.

[0019] Preferably, two aerosol fire extinguishers are provided. The two aerosol fire extinguishers are symmetrically installed on the top of the switch cabinet box body. One end of the right aerosol fire extinguisher close to the ball head pressure rod is lapped with an extrusion plate. A spring telescopic rod is fixedly connected between the left side of the extrusion plate and the surface of the aerosol fire extinguisher. The extrusion plate and the two ball head pressure rods are arranged on the same horizontal line.

[0020] Preferably, a transmission bearing is fixedly connected between the outer ring of the adjusting ring and the inner ring of the left end of the sound and light alarm. Five hinge blocks are fixedly connected to the inner ring of the adjusting ring at equal intervals along the circumference. The adjusting ring is hingedly installed with the end of the arc-shaped rod through the hinge blocks.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In the present invention, through the coordinated use of components such as a sound and light alarm, an intermittent transmission mechanism, and a cleaning and sealing mechanism, while the air inside the switch cabinet box body is flowing, the intermittent transmission mechanism periodically drives the cleaning and sealing mechanism to clean the surface of the smoke sensor inside the sound and light alarm, ensuring the sensitivity of the smoke sensor during long-term use.

[0023] In the present invention, through the coordinated use of components such as a smoke sensor, a cleaning and sealing mechanism, and an aerosol fire extinguisher, when a short circuit and a fire occur inside the switch cabinet box body, during the startup process of the aerosol fire extinguisher, the cleaning and sealing mechanism is driven to operate, so that the five cleaning plates on the cleaning and sealing mechanism move in a converging trend to shield and protect the position of the smoke sensor, preventing the sound and light alarm from being damaged and unable to give an alarm in time.

[0024] In the present invention, through the coordinated use of components such as a cleaning and sealing mechanism and a locking mechanism, when the cleaning and sealing mechanism operates to protect the smoke sensor, the Y-shaped limiting rod is engaged with the annular groove on the moving rod to lock the state of the cleaning and sealing mechanism after operation. When a fire occurs, the five converged cleaning plates can be in a locked state, ensuring the stability during the protection of the smoke sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of the position of the switch cabinet box body and the sound and light alarm of the present invention;

[0026] Figure 2 It is a side sectional view of the partial position of the sound and light alarm and the air guide fan of the present invention;

[0027] Figure 3 This is a top view of the local position of the sound and light alarm and the transmission ring of the present invention;

[0028] Figure 4 This is a front view of the position of the sound and light alarm and the moving ring of the present invention;

[0029] Figure 5 This is a left view of the local position of the arc-shaped rod and the cleaning plate of the present invention;

[0030] Figure 6 This is a side sectional view of the local position of the ring groove and the Y-shaped limiting rod of the present invention;

[0031] Figure 7 This is a side view of the local position of the moving ring and the adjusting ring of the present invention;

[0032] Figure 8 This is a side view of the end face gear ring and the transmission ring of the present invention;

[0033] Figure 9 This is a side view of the local position of the cleaning plate in the gathered state of the present invention;

[0034] Figure 10 This is a side view of the Y-shaped limiting rod of the present invention.

[0035] In the figure: 1, switch cabinet box body; 2, ventilation filter plate; 3, air guide fan; 4, sound and light alarm; 5, intermittent transmission mechanism; 501, semi-gear rod; 502, transmission ring; 503, end face gear ring; 504, wedge block; 6, cleaning and sealing mechanism; 601, adjusting ring; 602, arc-shaped rod; 603, cleaning plate; 604, moving ring; 605, moving rod; 606, return spring; 607, adjusting rod; 608, ring groove; 609, ball head pressure rod; 610, sliding pin; 611, arc-shaped sliding groove; 612, aerosol fire extinguisher; 613, extrusion plate; 614, spring telescopic rod; 7, smoke sensor; 8, locking mechanism; 801, cushion block; 802, Y-shaped limiting rod; 803, limiting spring. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a safety protection device for a power switch cabinet, including:

[0038] Switch cabinet box body 1, an air ventilation and filtering plate 2 is fixedly connected to the lower part on the left side of the switch cabinet box body 1, an air guiding fan 3 is fixedly connected to the upper part on the right side of the switch cabinet box body 1, and an audible and visual alarm 4 is fixedly connected to the right side of the switch cabinet box body 1. It should be noted that: the audible and visual alarm 4 is arranged below the air guiding fan 3, and the left end of the audible and visual alarm 4 extends into the switch cabinet box body 1; an L-shaped guiding pipe is fixedly connected to the outside of the air guiding fan 3, and the air guiding fan 3 is fixedly connected to the surface of the switch cabinet box body 1 through the L-shaped guiding pipe. When the air guiding fan 3 starts, the air flow inside the switch cabinet box body 1 flows from the lower left corner to the upper right corner. When a short circuit occurs inside the switch cabinet, the flue gas can timely pass through the position of the audible and visual alarm 4 to ensure that the alarm is triggered in time.

[0039] It also includes:

[0040] An intermittent transmission mechanism 5, the intermittent transmission mechanism 5 is movably installed between the air guiding fan 3 and the audible and visual alarm 4, and a cleaning and sealing mechanism 6 cooperating with the intermittent transmission mechanism 5 is movably installed at the left end of the audible and visual alarm 4, and the cleaning and sealing mechanism 6 is driven to operate periodically by the intermittent transmission mechanism 5.

[0041] In this embodiment, as Figures 1 to 10 shown, a smoke sensor 7 cooperating with the cleaning and sealing mechanism 6 is fixedly connected inside the audible and visual alarm 4, and a locking mechanism 8 cooperating with the cleaning and sealing mechanism 6 is movably installed on the surface of the audible and visual alarm 4.

[0042] The locking mechanism 8 includes a cushion block 801, the cushion block 801 is fixedly connected to the surface of the audible and visual alarm 4, a Y-shaped limiting rod 802 is vertically slidably connected inside the cushion block 801, the top of the Y-shaped limiting rod 802 abuts against the surface of the cleaning and sealing mechanism 6, and a limiting spring 803 is movably connected between the middle of the Y-shaped limiting rod 802 and the top of the cushion block 801.

[0043] In this embodiment, as Figures 1 to 10 shown, the intermittent transmission mechanism 5 includes a semi-gear rod 501, the upper end of the semi-gear rod 501 is fixedly connected to the rotating end of the air guiding fan 3, a transmission ring 502 is rotatably connected to the middle of the audible and visual alarm 4, an end face tooth ring 503 is fixedly sleeved on the surface of the transmission ring 502, the right side of the end face tooth ring 503 is meshed and driven with the surface of the semi-gear rod 501, and a wedge block 504 cooperating with the cleaning and sealing mechanism 6 is fixedly connected to the outer wall of the transmission ring 502. It should be noted that: when the air guiding fan 3 is running, the semi-gear rod 501 will be intermittently meshed with the end face tooth ring 503, and the end face tooth ring 503 will drive the transmission ring 502 to rotate intermittently on the surface of the audible and visual alarm 4.

[0044] In this embodiment, as Figures 1 to 10As shown, there are four wedge blocks 504, and the four wedge blocks 504 are fixedly connected to the outer wall of the transmission ring 502 at equal intervals.

[0045] A one-way bearing is fixedly connected between the inner ring of the transmission ring 502 and the outer ring of the sound and light alarm 4. It should be noted that: through the setting of the one-way bearing, the transmission ring 502 can only rotate on the surface of the sound and light alarm 4 during the meshing transmission with the half gear rod 501 through the end face tooth ring 503, so as to avoid the rotation of the transmission ring 502 during the contact between the wedge block 504 and the cleaning and sealing mechanism 6.

[0046] In this embodiment, as Figures 1 to 10 shown, the cleaning and sealing mechanism 6 includes an adjusting ring 601. The adjusting ring 601 is rotatably connected to the left end of the sound and light alarm 4. Five arc-shaped rods 602 are hinged to the inner ring of the adjusting ring 601 at equal intervals along the circumference. Five cleaning plates 603 are hinged to the left end of the sound and light alarm 4 at equal intervals along the circumference. The five cleaning plates 603 correspond to the five arc-shaped rods 602 one by one. The end of the arc-shaped rod 602 far from the adjusting ring 601 is hinged to the surface of the corresponding cleaning plate 603. The side of the cleaning plate 603 far from the arc-shaped rod 602 is lapped on the surface of the smoke sensor 7. It should be noted that: a through hole matching the smoke sensor 7 is opened at the left end of the sound and light alarm 4. The five cleaning plates 603 are arranged along the edge position of the through hole. This through hole is a conventional technique on the smoke sensor 7 to enable the smoke sensor 7 to effectively contact the soot, so it will not be described in detail here; when the five cleaning plates 603 deflect in a converging state, they can seal the position of the through hole, so as to protect the position of the smoke sensor 7, and bristles are provided in the direction of the cleaning plate 603 close to the smoke sensor 7.

[0047] A moving ring 604 is movably sleeved on the outer wall of the adjusting ring 601. Both the top and bottom of the moving ring 604 are fixedly connected with moving rods 605. One end of the moving rod 605 is movably inserted through the surface of the sound and light alarm 4. A return spring 606 is movably sleeved in the middle of the moving rod 605. The right end of the moving rod 605 is fixedly connected with an adjusting rod 607 matching the wedge block 504. A ring groove 608 matching the Y-shaped limiting rod 802 is opened on the surface of the moving rod 605. It should be noted that: the ring groove 608 is opened on the surface of the upper moving rod 605. When the moving ring 604 drives the moving rod 605 to move to the extreme right position, the ring groove 608 on the moving rod 605 is inserted in cooperation with the Y-shaped limiting rod 802. Since the five cleaning plates 603 are in a converging and closed state at this time, the stability of the cleaning plates 603 during the protection of the smoke sensor 7 is ensured.

[0048] A ball - headed pressure rod 609 is symmetrically and fixedly connected to the left side of the moving ring 604, and sliding pins 610 are symmetrically and fixedly connected to the right side of the moving ring 604. Arc - shaped sliding grooves 611 are symmetrically formed on the surface of the adjusting ring 601, and the two sliding pins 610 are respectively slidably connected inside the two arc - shaped sliding grooves 611. It should be noted that the two ball - headed pressure rods 609 and the two sliding pins 610 correspond one by one.

[0049] An aerosol fire extinguisher 612 that cooperates with the ball - headed pressure rod 609 is fixedly connected to the inner top surface of the switch cabinet box body 1, and the aerosol fire extinguisher 612 is electrically connected to the sound and light alarm 4. It should be noted that when the sound and light alarm 4 is activated, the aerosol fire extinguisher 612 is triggered to start through an electrical signal.

[0050] In this embodiment, as Figures 1 to 10 shown, the distance between the two ends of the arc - shaped sliding groove 611 is set to 1.2 times the width of the wedge - shaped block 504. It should be noted that with this distance setting, during the rotation of the transmission ring 502, the inclined surface of the wedge - shaped block 504 will contact the end of the adjusting rod 607, causing the adjusting rod 607 to drive the moving rod 605 to move to the right. During the cooperation between the wedge - shaped block 504 and the adjusting rod 607, the moving rod 605 will not move to the extreme position to the right, avoiding the engagement of the annular groove 608 on the moving rod 605 with the Y - shaped limiting rod 802; and the distance between the annular groove 608 and the Y - shaped limiting rod 802 is the same as the distance between the two ends of the arc - shaped sliding groove 611; when the arc - shaped sliding groove 611 and the sliding pin 610 cooperate and slide to the extreme position, the annular groove 608 on the moving rod 605 engages with the Y - shaped limiting rod 802.

[0051] One end of the adjusting rod 607 close to the wedge - shaped block 504 is spherical.

[0052] In this embodiment, as Figures 1 to 10 shown, two aerosol fire extinguishers 612 are provided. The two aerosol fire extinguishers 612 are symmetrically installed on the top of the switch cabinet box body 1. One end of the right - hand aerosol fire extinguisher 612 close to the ball - headed pressure rod 609 is lapped with an extrusion plate 613. A spring telescopic rod 614 is fixedly connected between the left side of the extrusion plate 613 and the surface of the aerosol fire extinguisher 612. The extrusion plate 613 and the two ball - headed pressure rods 609 are arranged on the same horizontal line. It should be noted that after the aerosol fire extinguisher 612 is activated, the pressure at the fire - extinguishing end of the aerosol fire extinguisher 612 will push the extrusion plate 613 to move to the right, causing the extrusion plate 613 to push the ball - headed pressure rod 609 to move to the right. Then, the ball - headed pressure rod 609 drives the moving ring 604 to move on the surface of the adjusting ring 601. At this time, the sliding pin 610 and the arc - shaped sliding groove 611 cooperate to slide, causing the adjusting ring 601 to drive the arc - shaped rod 602 to deflect at the left - hand position of the sound and light alarm 4.

[0053] In this embodiment, as Figures 1 to 10As shown in the figure, a transmission bearing is fixedly connected between the outer ring of the adjusting ring 601 and the inner ring at the left end of the sound and light alarm 4. Five hinge blocks are fixedly connected to the inner ring of the adjusting ring 601 at equal intervals along the circumference. The adjusting ring 601 is hingedly installed with the end of the arc-shaped rod 602 through the hinge blocks. It should be noted that: the outer shells of the sound and light alarm 4 and the cleaning plate 603 are both made of metal plates, and the sound and light alarm 4 is internally equipped with a built-in battery to avoid affecting normal use after power failure.

[0054] The usage method and advantages of the present invention: For this kind of safety protection device for a power switch cabinet, the working process is as follows:

[0055] As Figures 1 to 10 shown in the figure, during use, the air guide fan 3 and the ventilation filter plate 2 are used in cooperation to enable the air flow inside the switch cabinet box body 1 to achieve a flowing effect. During the rotation of the rotating end of the air guide fan 3 driving the semi-gear rod 501, the semi-gear rod 501 meshes and drives with the end face tooth ring 503 on the surface of the transmission ring 502 periodically, causing the transmission ring 502 to drive the wedge-shaped block 504 to rotate. During the sliding cooperation between the inclined surface position of the wedge-shaped block 504 and the end of the adjusting rod 607, the adjusting rod 607 pulls the moving rod 605 and the moving ring 604 to slide on the surface of the adjusting ring 601. At this time, the sliding pin 610 on the moving ring 604 slides in cooperation with the arc-shaped chute 611, causing the adjusting ring 601 to rotate at the left end position of the sound and light alarm 4. The rotating adjusting ring 601 drives the hinged arc-shaped rod 602 to deflect, causing the arc-shaped rod 602 to drive the hinged cleaning plate 603 to deflect at the left end position of the sound and light alarm 4. During the synchronous deflection of the five cleaning plates 603 into a converging state, the surface of the smoke sensor 7 is cleaned to prevent dust from accumulating on the surface of the smoke sensor 7 and affecting the alarm sensitivity. When the rotating transmission ring 502 drives the wedge-shaped block 504 to release contact with the adjusting rod 607, the return spring 606 drives the moving rod 605 and the moving ring 604 to reset and move. At this time, the adjusting ring 601 rotates in the reverse direction, causing the five cleaning plates 603 to deflect and reset in a spreading trend. In this way, the five cleaning plates 603 periodically spread and converge to perform regular self-cleaning on the surface of the smoke sensor 7;

[0056] When an electrical component inside the switchgear cabinet body 1 short - circuits, the flowing gas will carry the smoke and contact the surface of the smoke sensor 7 inside the sound and light alarm 4 in a timely manner. At this time, the smoke sensor 7 gives an alarm. Meanwhile, the aerosol fire extinguisher 612 electrically connected to the sound and light alarm 4 is activated. When the aerosol fire extinguisher 612 on the right - hand side is being opened, the pressure at the fire - extinguishing end of the aerosol fire extinguisher 612 acts on the surface of the extrusion plate 613, causing the extrusion plate 613 to move towards the sound and light alarm 4 and press against the surface of the ball - headed pressure rod 609, making the ball - headed pressure rod 609 drive the sliding pin 610 on the moving ring 604 to slide inside the arc - shaped chute 611. At this time, the adjusting ring 601 rotates and drives the cleaning plate 603 to flip through the articulated arc - shaped rod 602. After deflection, the five cleaning plates are in a converging state to shield and protect the smoke sensor 7. At the same time, the ball - headed pressure rod 609 will drive the moving ring 604 to move to the extreme right position on the surface of the adjusting ring 601, so that the annular groove 608 on the moving rod 605 is inserted and matched with the Y - shaped limiting rod 802 on the sound and light alarm 4 to limit and lock the rotated adjusting ring 601, ensuring that when a fire occurs, the smoke sensor 7 inside the sound and light alarm 4 can be effectively protected.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Technical staff in this industry should understand that the present invention is not limited by the above - mentioned embodiments. The above - mentioned embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for a power switch cabinet, comprising: A switch cabinet body (1), a ventilation filter plate (2) is fixedly connected to the lower part of the left side of the switch cabinet body (1), an air guide fan (3) is fixedly connected to the upper part of the right side of the switch cabinet body (1), and an audible and visual alarm (4) is fixedly connected to the right side of the switch cabinet body (1); It is characterized in that it further comprises: An intermittent transmission mechanism (5), the intermittent transmission mechanism (5) is movably installed between the air guide fan (3) and the audible and visual alarm (4), and a cleaning and sealing mechanism (6) cooperating with the intermittent transmission mechanism (5) is movably installed at the left end of the audible and visual alarm (4), and the cleaning and sealing mechanism (6) is driven to operate periodically by the intermittent transmission mechanism (5).

2. The safety protection device for a power switchgear according to claim 1, wherein: A smoke sensor (7) cooperating with the cleaning and sealing mechanism (6) is fixedly connected to the inside of the audible and visual alarm (4), and a locking mechanism (8) cooperating with the cleaning and sealing mechanism (6) is movably installed on the surface of the audible and visual alarm (4); The locking mechanism (8) includes a cushion block (801), the cushion block (801) is fixedly connected to the surface of the audible and visual alarm (4), a Y-shaped limiting rod (802) is vertically slidably connected inside the cushion block (801), the top of the Y-shaped limiting rod (802) is lapped with the surface of the cleaning and sealing mechanism (6), and a limiting spring (803) is movably connected between the middle of the Y-shaped limiting rod (802) and the top of the cushion block (801).

3. The safety protection device for a power switch cabinet according to claim 2, characterized in that: The intermittent transmission mechanism (5) includes a semi-gear rod (501), the upper end of the semi-gear rod (501) is fixedly connected to the rotating end of the air guide fan (3), a transmission ring (502) is rotatably connected to the middle of the audible and visual alarm (4), an end face tooth ring (503) is fixedly sleeved on the surface of the transmission ring (502), the right side of the end face tooth ring (503) is in meshing transmission with the surface of the semi-gear rod (501), and a wedge block (504) cooperating with the cleaning and sealing mechanism (6) is fixedly connected to the outer wall of the transmission ring (502).

4. The safety protection device for a power switch cabinet according to claim 3, characterized in that: The wedge blocks (504) are provided with four, and the four wedge blocks (504) are fixedly connected to the outer wall of the transmission ring (502) at equal intervals; A one-way bearing is fixedly connected between the inner ring of the transmission ring (502) and the outer ring of the audible and visual alarm (4).

5. An electrical switchgear safety protection device according to claim 4, characterized in that: The cleaning and sealing mechanism (6) includes an adjusting ring (601), the adjusting ring (601) is rotatably connected to the left end of the audible and visual alarm (4), five arc-shaped rods (602) are hinged to the inner ring of the adjusting ring (601) at equal intervals along the circumference, five cleaning plates (603) are hinged to the left end of the audible and visual alarm (4) at equal intervals along the circumference, the five cleaning plates (603) correspond to the five arc-shaped rods (602) one by one, the end of the arc-shaped rod (602) far from the adjusting ring (601) is hinged to the surface of the corresponding cleaning plate (603), and the side of the cleaning plate (603) far from the arc-shaped rod (602) is lapped with the surface of the smoke sensor (7); The outer wall of the adjusting ring (601) is movably sleeved with a moving ring (604). Both the top and bottom of the moving ring (604) are fixedly connected with moving rods (605). One end of the moving rod (605) is movably inserted through the surface of the sound and light alarm (4). The middle of the moving rod (605) is movably sleeved with a return spring (606). The right end of the moving rod (605) is fixedly connected with an adjusting rod (607) that cooperates with the wedge-shaped block (504). A ring groove (608) that cooperates with the Y-shaped limiting rod (802) is formed on the surface of the moving rod (605). On the left side of the moving ring (604), ball-headed pressure rods (609) are symmetrically and fixedly connected. On the right side of the moving ring (604), sliding pins (610) are symmetrically and fixedly connected. Arc-shaped sliding grooves (611) are symmetrically formed on the surface of the adjusting ring (601). The two sliding pins (610) are respectively slidably connected inside the two arc-shaped sliding grooves (611). An aerosol fire extinguisher (612) that cooperates with the ball-headed pressure rod (609) is fixedly connected to the inner top surface of the switch cabinet box body (1). The aerosol fire extinguisher (612) is electrically connected to the sound and light alarm (4).

6. The safety protection device for a power switchgear according to claim 5, characterized in that: The distance between the two ends of the arc-shaped sliding groove (611) is set to be 1.2 times the width of the wedge-shaped block (504). One end of the adjusting rod (607) close to the wedge-shaped block (504) is spherical.

7. The safety protection device for a power switch cabinet according to claim 6, characterized in that: There are two aerosol fire extinguishers (612). The two aerosol fire extinguishers (612) are symmetrically installed on the top of the switch cabinet box body (1). One end of the right aerosol fire extinguisher (612) close to the ball-headed pressure rod (609) is lapped with an extrusion plate (613). A spring telescopic rod (614) is fixedly connected between the left side of the extrusion plate (613) and the surface of the aerosol fire extinguisher (612). The extrusion plate (613) and the two ball-headed pressure rods (609) are arranged on the same horizontal line.

8. The safety protection device for a power switchgear according to claim 7, characterized in that: A transmission bearing is fixedly connected between the outer ring of the adjusting ring (601) and the inner ring at the left end of the sound and light alarm (4). Five hinge blocks are fixedly connected to the inner ring of the adjusting ring (601) at equal intervals along the circumference. The adjusting ring (601) is hingedly installed with the end of the arc-shaped rod (602) through the hinge blocks.

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