Resonance-resistant capacitor with overvoltage and undervoltage protection

Abstract

The invention relates to the related technical field of power electronics, in particular to an anti-harmonic capacitor with overvoltage and undervoltage protection, which comprises a shell, a heat dissipation opening is formed in the surface of one side of the shell, and a display screen is fixedly connected to the surface of one side of the shell. Through the arrangement of the fixing mechanism, during use, a knife switch is moved to be powered off, then a limiting spring connected with the knife switch is contracted by pressing a key, a lock catch is made to be far away from a buckle, meanwhile, a cover opening spring abutting against the buckle can rapidly complete the rebound action, the buckle is made to be far away from the cover opening spring, a sealing cover is driven to rotate around a rotating shaft, and cover opening is completed; during actual use, a worker can easily open the sealing cover and take out the fusing mechanism for replacement only by completing simple actions of moving the knife switch, pressing the key and the like in sequence, and compared with a traditional complex disassembly mode, the time is greatly saved, the maintenance efficiency is remarkably improved, and the maintenance cost is reduced. And the production loss caused by shutdown maintenance of equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to power electronics, and in particular to an anti-harmonic capacitor with overvoltage and undervoltage protection. Background Art

[0002] In the field of power electronics, the optimization and stability of power quality are of vital importance. With the rapid development of industrial automation and smart grids, higher requirements are placed on the performance of reactive compensation and filtering equipment. Anti-harmonic capacitors with overvoltage and undervoltage protection use cutting-edge power electronics technology and integrate the two key functions of overvoltage and undervoltage protection and anti-harmonic filtering. The equipment is equipped with a high-precision voltage sensor that can monitor the grid voltage in real time and accurately. Once the voltage is overvoltage or undervoltage, the protection circuit responds quickly and cuts off the connection between the capacitor and the grid in time to prevent the capacitor from being damaged by abnormal voltage. Therefore, there is a special need for an anti-harmonic capacitor with overvoltage and undervoltage protection.

[0003] However, the existing anti-tuning capacitors are relatively simple to install and replace for large-size fuses for power-off protection. The traditional installation structure is relatively simple and not easy to carry out subsequent replacement and maintenance, making the replacement and maintenance of fuses extremely cumbersome. Each maintenance requires a lot of manpower and material resources, reducing the operation and maintenance efficiency of the power system. At the same time, in complex industrial environments, anti-tuning capacitors are susceptible to varying degrees of vibration and impact. Under long-term and continuous vibration, the electronic components inside the capacitors are prone to loosening and falling off, which seriously affects the performance of the anti-tuning capacitors, significantly shortens their service life, and may even cause serious power failures. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-tuning capacitor with overvoltage and undervoltage protection to solve the problems of the existing anti-tuning capacitor proposed in the above background technology. The installation and replacement of large-size fuses for power-off protection are relatively simple, and the traditional installation structure is relatively simple, which is not easy to carry out subsequent replacement and maintenance, making the replacement and maintenance of fuses extremely cumbersome. Each maintenance requires a lot of manpower and material resources, which reduces the operation and maintenance efficiency of the power system. At the same time, in a complex industrial environment, the anti-tuning capacitor is susceptible to vibration and impact of varying degrees. Under long-term and continuous vibration, the electronic components inside the capacitor are prone to loosening and falling off, which seriously affects the performance of the anti-tuning capacitor, greatly shortens its service life, and may even cause serious power failures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-harmonic capacitor with overvoltage and undervoltage protection, comprising a housing, a heat dissipation vent being provided on one side surface of the housing, a display screen being fixedly connected to one side surface of the housing, a fan being fixedly connected to one side surface of the housing, a movable hole being provided on one side surface of the housing, fins being fixedly connected to the inner surface of the housing, a shock absorbing mechanism being provided on the lower surface of the housing, a base being provided on the lower surface of the shock absorbing mechanism, a fixing mechanism being provided on one side surface of the housing, and a fuse being provided on the inner surface of the fixing mechanism;

[0006] The fixing mechanism includes a protective gate, a groove, a gate knife, a limiting spring, a lock buckle, a button, a buckle, a fixing groove, a cover, a rotating shaft and a cover opening spring. The protective gate is fixedly connected to one side surface of the shell, a groove is provided on one side surface of the protective gate, a gate knife is rotatably connected to one side surface of the protective gate, a limiting spring is fixedly connected to one side surface of the protective gate, a lock buckle is fixedly connected to one side surface of the limiting spring, a button is fixedly connected to one side surface of the lock buckle, a buckle is slidably connected to one side surface of the button, a cover is fixedly connected to one side surface of the buckle, a fixing groove is provided on one side surface of the cover, a rotating shaft is fixedly connected to one side surface of the buckle, and a cover opening spring is slidably connected to one side surface of the buckle.

[0007] Preferably, a plurality of heat dissipation openings of the same size are provided and are symmetrically distributed along both sides of the housing, and the base and the fan are distributed in parallel.

[0008] Preferably, the outer side of the fin is designed in a concave shape, and a plurality of fins of the same size are provided, and the fins are distributed parallel to the fan.

[0009] Preferably, the inner wall size of the movable hole matches the outer wall size of the end of the button close to the protective gate, and the end of the button close to the gate knife is fixedly connected to the lock buckle.

[0010] Preferably, the horizontal center line of the cover-opening spring and the horizontal center line of the limiting spring are perpendicularly intersected, and the cover-opening spring is slidably connected to the inner surface of the button.

[0011] Preferably, the protective gate, limiting spring, lock catch and button are distributed in parallel, and the vertical center line of the rotating shaft and the horizontal center line of the protective gate are perpendicularly intersected.

[0012] Preferably, the shock absorbing mechanism includes a damping device, a fixed plate, a shock absorbing spring, a buffer plate, a connecting rod, a pulley, a base plate and a slide groove. The inner surface of the shell is fixedly connected to the fixed plate, one side surface of the fixed plate is penetrated and connected to the damping device, the outer surface of the damping device is slidably connected to the shock absorbing spring, one side surface of the shock absorbing spring is slidably connected to the buffer plate, one side surface of the buffer plate is rotatably connected to the connecting rod, the inner surface of the connecting rod is rotatably connected to the pulley, one side surface of the damping device is fixedly connected to the base plate, and one side surface of the base plate is provided with a slide groove.

[0013] Preferably, the outer wall size of the pulley matches the inner wall size of the chute, and the fixing plate and the bottom plate are distributed in parallel.

[0014] Preferably, the fusing mechanism includes a contact blade, an insulating jacket, a cap, a fuse and a quartz sand layer, the inner surface of the groove is slidably connected to the contact blade, one side surface of the contact blade is fixedly connected to the insulating jacket, one side surface of the insulating jacket is fixedly connected to the cap, the inner side of the insulating jacket is fixedly connected to the fuse, and the inner side of the insulating jacket is filled with a quartz sand layer.

[0015] Preferably, the outer wall dimensions of the contact blade, insulating jacket and cap match the inner wall dimensions of the groove, and the outer wall dimension of the end of the cap away from the protective gate matches the inner wall dimension of the fixing groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: this anti-harmonic capacitor with overvoltage and undervoltage protection, through the setting of the fixing mechanism, when in use, ensures power off by moving the switch knife, and then by pressing the button, the limiting spring connected to it is contracted in the direction of the protection gate so that the lock is away from the buckle, and at the same time, the cover opening spring against the buckle will quickly complete the rebound action, so that the buckle is away from the cover spring, and drive the cover to rotate around the rotating shaft to complete the cover opening, hold the cap to make the fuse mechanism away from the groove, and complete the replacement. In actual use, the staff only needs to complete simple actions such as moving the switch knife and pressing the button in sequence to easily open the cover and take out the fuse mechanism for replacement. Compared with the traditional complicated disassembly method, it greatly saves time, reduces the risk of errors caused by complicated operations, significantly improves maintenance efficiency, and reduces production losses caused by equipment downtime maintenance.

[0017] Through the setting of the shock-absorbing mechanism, when the outer shell vibrates during use, the vibration will be transmitted to the fixed plate, causing the shock-absorbing spring under the fixed plate to shake. At the same time, the damping device and the buffer plate will limit the shock-absorbing spring to make it quickly and stabilize. When the shock-absorbing spring drives the buffer plate to vibrate, the connecting rods on both sides will also vibrate with it, and drive the pulley to move along the slide groove opened in the bottom plate, playing a role in dispersing shock absorption. Once the vibration is transmitted to the fixed plate, the shock-absorbing spring will shake immediately, and quickly stabilize with the cooperation of the damping device and the buffer plate, quickly suppressing the continuous effect of vibration. At the same time, the movement of the pulley in the slide groove can flexibly disperse the vibration, shorten the recovery time of the equipment from vibration to stability, ensure the continuity and stability of the equipment operation, and reduce the risk of equipment damage caused by frequent vibration.

[0018] The fuse mechanism, when in use, connects the internal fuse to the circuit via the contact blade. When the voltage is too high, the fuse inside the insulating jacket melts. When the fuse blows, the quartz sand layer on the outside of the fuse quickly extinguishes the lit fuse. When the fuse blows and an arc is generated, the outer quartz sand layer, with its excellent arc-extinguishing properties, quickly extinguishes the arc. This rapid arc-extinguishing mechanism effectively prevents electrical fires caused by persistent arcs, greatly reducing potential safety risks and ensuring the safety of equipment and personnel in complex electrical environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the cover closing structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the cover opening structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the shell separation structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the shock absorbing mechanism of the present invention;

[0025] Figure 7 This is a schematic diagram of the disassembled structure of the fixing mechanism of the present invention;

[0026] Figure 8 It is a schematic plan view of the internal structure of the fuse mechanism of the present invention.

[0027] In the figure: 1. Shell; 2. Heat dissipation vent; 3. Display screen; 4. Fan; 5. Movable hole; 6. Fin; 7. Base; 8. Fixing mechanism; 801. Protective gate; 802. Groove; 803. Switch knife; 804. Limiting spring; 805. Lock; 806. Button; 807. Buckle; 808. Fixing groove; 809. Cover; 810. Rotating shaft; 811. Cover opening spring; 9. Shock-absorbing mechanism; 901. Damping device; 902. Fixing plate; 903. Shock-absorbing spring; 904. Buffer plate; 905. Connecting rod; 906. Pulley; 907. Bottom plate; 908. Slide groove; 10. Fusing mechanism; 1001. Contact knife; 1002. Insulating jacket; 1003. Cover; 1004. Fuse; 1005. Quartz sand layer. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-8 The present invention provides a technical solution: an anti-harmonic capacitor with overvoltage and undervoltage protection, comprising a housing 1, a heat dissipation vent 2 being provided on one side surface of the housing 1, a display screen 3 being fixedly connected to one side surface of the housing 1, a fan 4 being fixedly connected to one side surface of the housing 1, a movable hole 5 being provided on one side surface of the housing 1, a fin 6 being fixedly connected to the inner side surface of the housing 1, a shock absorbing mechanism 9 being provided on the lower surface of the housing 1, a base 7 being provided on the lower surface of the shock absorbing mechanism 9, a fixing mechanism 8 being provided on one side surface of the housing 1, and a fuse mechanism 10 being provided on the inner surface of the fixing mechanism 8;

[0030] The fixing mechanism 8 includes a protective gate 801, a groove 802, a gate knife 803, a limiting spring 804, a lock 805, a button 806, a buckle 807, a fixing groove 808, a cover 809, a rotating shaft 810 and a cover opening spring 811. The protective gate 801 is fixedly connected to one side surface of the housing 1. The groove 802 is provided on one side surface of the protective gate 801. The gate knife 803 is rotatably connected to one side surface of the protective gate 801. The limiting spring 804 is fixedly connected to one side surface of the protective gate 801. The limiting spring 811 is fixedly connected to one side surface of the protective gate 801. One side surface of the spring 804 is fixedly connected with a lock buckle 805, one side surface of the lock buckle 805 is fixedly connected with a button 806, one side surface of the button 806 is slidably connected with a buckle 807, one side surface of the buckle 807 is fixedly connected with a cover 809, one side surface of the cover 809 is provided with a fixing groove 808, one side surface of the cover 809 is fixedly connected with a rotating shaft 810, one side surface of the buckle 807 is slidably connected with a cover opening spring 811, through the protective gate 801, the groove 802, the knife 803, the limit The arrangement of the control spring 804, lock 805, button 806, buckle 807, fixing groove 808, cover 809, rotating shaft 810 and cover opening spring 811 is as follows: when in use, first move the switch 803 to ensure that the power is cut off, then press the button 806 to make the limit spring 804 connected thereto contract in the direction of the protection gate 801 so that the lock 805 is away from the buckle 807, so that the buckle 807 loses its restriction, and at the same time the cover opening spring 811 pressed against by the buckle 807 will quickly complete the rebound action. The buckle 807 is moved away from the cover spring 811, and the cover 809 is driven to rotate around the rotating shaft 810, so that the fixing groove 808 is moved away from the fuse mechanism 10, and the cover is opened. The convenient cover opening design greatly reduces the difficulty of replacing the fuse mechanism 10, so that non-professionals can easily complete the operation after simple training without the aid of any tools. This not only reduces the dependence on professional maintenance personnel and reduces labor costs, but also shortens the equipment failure repair time and reduces the losses caused by equipment downtime.

[0031] Furthermore, multiple heat dissipation ports 2 of the same size are provided and are symmetrically distributed along both sides of the shell 1. The base 7 and the fan 4 are distributed in parallel. Through the setting of the heat dissipation ports 2 and the fan 4, when in use, the multiple heat dissipation ports 2 will quickly disperse the heat generated during operation, and the fan 4 will cool the interior. The design of multiple heat dissipation ports 2 greatly increases the heat dissipation area. The heat generated during operation can be quickly dispersed and discharged through these heat dissipation ports 2. The cold air blown out by the fan 4 directly passes through the interior of the device, takes away the heat, and is then discharged from the heat dissipation ports 2, thereby achieving efficient heat dissipation and reducing performance degradation due to overheating.

[0032] Furthermore, the outer side of the fin 6 is designed in a "concave" shape, and multiple fins of the same size are provided. The fins 6 and the fan 4 are distributed in parallel. Through the arrangement of the fins 6 and the fan 4, when in use, the multiple fins 6 quickly absorb heat, and the multiple fins 6 are dissipated by the fan 4. The "concave" shape design increases the area of the fins 6 exposed to the fan 4, and the heat dissipation continues more quickly.

[0033] Furthermore, the inner wall size of the movable hole 5 is consistent with the outer wall size of the end of the button 806 close to the protective gate 801, and the end of the button 806 close to the gate knife 803 is fixedly connected to the lock buckle 805. Through the setting of the movable hole 5 and the button 806, when in use, the button 806 can slide through the movable hole 5, and can maintain a stable and precise moving trajectory during the sliding process, reducing shaking or offset, and is less prone to malfunction, thereby bringing users a smoother and more accurate operation experience and improving the overall use experience.

[0034] Furthermore, the horizontal center line of the cover opening spring 811 is vertically crossed with the horizontal center line of the limiting spring 804, and the cover opening spring 811 is slidably connected to the inner surface of the button 806. Through the setting of the cover opening spring 811, the button 806 and the limiting spring 804, when in use, the button 806 will squeeze the limiting spring 804, and when the button 806 is released, the limiting spring 804 will rebound, and at the same time, the buckle 807 will compress the cover opening spring 811. When the buckle 807 loses its restriction, the cover opening spring 811 will quickly pop open the buckle 807. The vertical cross layout cleverly utilizes the space inside the device and realizes multiple functions in a limited space. Compared with the traditional parallel layout or decentralized design, this design reduces unnecessary space occupation, leaving more space for the installation and layout of other components inside the device, which helps to improve the integration and miniaturization of the device.

[0035] Furthermore, the protective gate 801, the limiting spring 804, the lock buckle 805 and the button 806 are distributed in parallel, and the vertical center line of the rotating shaft 810 is perpendicular to the horizontal center line of the protective gate 801. Through the setting of the limiting spring 804, the lock buckle 805 and the button 806, when in use, by pressing the button 806, the lock buckle 805 compresses the limiting spring 804. This parallel distribution design makes the various components evenly stressed, avoiding damage or deformation of the components due to uneven force. The lock buckle 805 and the limiting spring 804 are precisely matched, and can maintain a stable working state during repeated compression and rebound, effectively reducing wear and extending the service life of the components.

[0036] Furthermore, the shock absorbing mechanism 9 includes a damping device 901, a fixed plate 902, a shock absorbing spring 903, a buffer plate 904, a connecting rod 905, a pulley 906, a bottom plate 907 and a slide groove 908. The inner surface of the shell 1 is fixedly connected to the fixed plate 902, and one side surface of the fixed plate 902 is connected with the damping device 901. The outer surface of the damping device 901 is slidably connected to the shock absorbing spring 903, and one side surface of the shock absorbing spring 903 is slidably connected to the buffer plate 904. One side surface of the buffer plate 904 is rotatably connected to the connecting rod 905. The inner surface of the connecting rod 905 is rotatably connected to the pulley 906. One side surface of the damping device 901 is fixedly connected to the bottom plate 907, and a slide groove 908 is provided on one side surface of the bottom plate 907. Due to the arrangement of the groove 908, when the device vibrates during use, the vibration will be transmitted to the fixed plate 902, causing the shock-absorbing spring 903 under the fixed plate 902 to shake. At the same time, the damping device 901 and the buffer plate 904 will limit the shock-absorbing spring 903 to make it fast and stable. When the shock-absorbing spring 903 drives the buffer plate 904 to vibrate, the connecting rods 905 on both sides will also vibrate and drive the pulley 906 to move along the sliding groove 908 opened in the bottom plate 907, playing a role in dispersing and absorbing shock. When encountering a sudden strong impact, the shock-absorbing spring 903 and the buffer plate 904 can quickly buffer the impact energy and prevent the impact force from directly acting on the device body. The damping device 901 further suppresses the violent vibration caused by the impact, and cooperates with the dispersing effect of the connecting rod 905 and the pulley 906 to effectively reduce the risk of damage to the equipment due to impact, thereby providing reliable safety protection for the use of the equipment in harsh environments.

[0037] Furthermore, the outer dimensions of pulley 906 match the inner dimensions of chute 908, and the fixed plate 902 and base plate 907 are arranged parallel to each other. Through the arrangement of pulley 906 and chute 908, during use, pulley 906 will slide along chute 908 in a restricted manner, ensuring that connecting rod 905 moves along a predetermined trajectory. When the equipment encounters complex vibrations, this precise guiding mechanism effectively prevents the buffer plate 904 from shifting or jamming, ensuring the normal operation of the shock absorption system, continuously and stably exerting its shock absorption effectiveness, and maintaining smooth operation of the equipment.

[0038] Furthermore, the fuse mechanism 10 includes a contact blade 1001, an insulating jacket 1002, a cap 1003, a fuse 1004 and a quartz sand layer 1005. The inner surface of the groove 802 is slidably connected to the contact blade 1001, one side surface of the contact blade 1001 is fixedly connected to the insulating jacket 1002, one side surface of the insulating jacket 1002 is fixedly connected to the cap 1003, the inner side of the insulating jacket 1002 is fixedly connected to the fuse 1004, and the inner side of the insulating jacket 1002 is filled with a quartz sand layer 1005. 1. The arrangement of the insulating jacket 1002, cap 1003, fuse 1004, and quartz sand layer 1005. During use, the internal fuse 1004 is connected to the circuit via the contact blade 1001. When the voltage is too high, the fuse 1004 inside the insulating jacket 1002 will melt. When the fuse 1004 melts, the quartz sand layer 1005 outside the fuse 1004 will quickly extinguish the lit fuse 1004. The insulating jacket 1002 isolates the current, preventing accidental electric shock to the user and reducing safety risks. When the circuit is overloaded or short-circuited, or the voltage is too high, the fuse 1004 will melt quickly, immediately shutting off the circuit and preventing serious accidents such as electrical fires and equipment burns caused by continuous overcurrent. At the same time, the quartz sand layer 1005 can quickly extinguish the arc generated by the fuse and suppress sparks, thus ensuring the safety of personnel and equipment in many aspects.

[0039] Furthermore, the outer wall dimensions of the touch blade 1001, the insulating jacket 1002 and the cap 1003 are consistent with the inner wall dimensions of the groove 802, and the outer wall dimension of the end of the cap 1003 away from the protective gate 801 is consistent with the inner wall dimension of the fixing groove 808. Through the arrangement of the groove 802, the touch blade 1001, the insulating jacket 1002 and the cap 1003, when in use, the cap 1003 is moved to keep the touch blade 1001, the insulating jacket 1002 and the cap 1003 away from the groove 802. The tight size match further enhances the protective effect of the insulating jacket 1002, effectively preventing impurities such as dust and moisture from entering the interior of the groove 802, avoiding the degradation of insulation performance due to the accumulation of impurities, reducing the risk of leakage and short circuit, and comprehensively ensuring the personal safety of users and the normal operation of equipment.

[0040] Working principle: First, overvoltage protection is achieved through the fuse mechanism 10, and the internal fuse 1004 is connected to the circuit through the contact knife 1001. When the voltage is too large, the fuse 1004 inside the insulating jacket 1002 will melt. When the fuse 1004 melts, the quartz sand layer 1005 outside the fuse 1004 will quickly extinguish the lit fuse 1004. Then, the fast replacement of the fuse mechanism 10 is completed through the fixing mechanism 8. First, by moving the switch knife 803 ensures power is off, and then by pressing the button 806, the limit spring 804 connected to it contracts in the direction of the protection gate 801, so that the lock buckle 805 is away from the buckle 807, so that the buckle 807 loses its restriction. At the same time, the cover opening spring 811 supported by the buckle 807 will quickly complete the rebound action, so that the buckle 807 is away from the cover spring 811, and drive the cover 809 to rotate around the rotating shaft 810, so that the fixing groove 808 is away from the fuse mechanism 10, and the cover is opened. Hold the cap 1003 to keep the fuse mechanism 10 away from the groove 802 and complete the replacement. In actual work, the shock-absorbing mechanism 9 will prevent the device from vibrating during actual use. When the shell 1 vibrates, the vibration will be transmitted to the fixed plate 902, causing the shock-absorbing spring 903 under the fixed plate 902 to shake. At the same time, the damping device 901 and the buffer plate 904 will limit the shock-absorbing spring 903 to make it fast and stable. When the shock-absorbing spring 903 drives the buffer plate 904 to vibrate, the connecting rods 905 on both sides will also vibrate and drive the pulley 906 to move along the slide groove 908 opened on the bottom plate 907, playing a role in dispersing shock absorption. When the internal heat of the capacitor is serious, the multiple heat dissipation ports 2 opened in the shell 1 will quickly evacuate the heat. At the same time, the internal fins 6 will also absorb heat, and the fan 4 directly above will cool the fins 6 to prevent overheating from affecting the normal operation of the equipment. In this way, the use process of an anti-harmonic capacitor with overvoltage and undervoltage protection is completed.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-harmonic capacitor with overvoltage and undervoltage protection, comprising a housing (1), characterized in that: A heat dissipation port (2) is provided on one side surface of the housing (1), a display screen (3) is fixedly connected to one side surface of the housing (1), a fan (4) is fixedly connected to one side surface of the housing (1), a movable hole (5) is provided on one side surface of the housing (1), a fin (6) is fixedly connected to the inner side surface of the housing (1), a shock absorbing mechanism (9) is provided on the lower surface of the housing (1), a base (7) is provided on the lower surface of the shock absorbing mechanism (9), a fixing mechanism (8) is provided on one side surface of the housing (1), and a fuse mechanism (10) is provided on the inner side surface of the fixing mechanism (8); The fixing mechanism (8) comprises a protective gate (801), a groove (802), a gate knife (803), a limiting spring (804), a lock catch (805), a button (806), a buckle (807), a fixing groove (808), a sealing cover (809), a rotating shaft (810) and a cover opening spring (811); the protective gate (801) is fixedly connected to one side surface of the housing (1); the groove (802) is provided on one side surface of the protective gate (801); the gate knife (803) is rotatably connected to one side surface of the protective gate (801); and the protective gate (801) is fixedly connected to one side surface of the protective gate (801). A limiting spring (804) is connected, one side surface of the limiting spring (804) is fixedly connected to a lock buckle (805), one side surface of the lock buckle (805) is fixedly connected to a button (806), one side surface of the button (806) is slidably connected to a buckle (807), one side surface of the buckle (807) is fixedly connected to a cover (809), one side surface of the cover (809) is provided with a fixing groove (808), one side surface of the cover (809) is fixedly connected to a rotating shaft (810), and one side surface of the buckle (807) is slidably connected to a cover opening spring (811).

2. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The heat dissipation openings (2) are provided with a plurality of the same size and are symmetrically distributed along both sides of the housing (1); the base (7) and the fan (4) are distributed in parallel.

3. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The outer side of the fin (6) is designed in a concave shape, and a plurality of fins of the same size are provided. The fin (6) and the fan (4) are distributed in parallel.

4. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The inner wall size of the movable hole (5) matches the outer wall size of the button (806) at one end close to the protective gate (801), and the end of the button (806) close to the gate blade (803) is fixedly connected to the lock buckle (805).

5. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The horizontal center line of the cover opening spring (811) and the horizontal center line of the limiting spring (804) are perpendicularly intersected, and the cover opening spring (811) is slidably connected to the inner surface of the button (806).

6. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The protection gate (801), the limiting spring (804), the lock catch (805) and the button (806) are arranged in parallel, and the vertical center line of the rotating shaft (810) and the horizontal center line of the protection gate (801) are perpendicularly intersected.

7. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The shock absorbing mechanism (9) comprises a damping device (901), a fixed plate (902), a shock absorbing spring (903), a buffer plate (904), a connecting rod (905), a pulley (906), a bottom plate (907) and a slide groove (908). The inner surface of the housing (1) is fixedly connected to the fixed plate (902), one side surface of the fixed plate (902) is connected to the damping device (901), the outer surface of the damping device (901) is slidably connected to the shock absorbing spring (903), one side surface of the shock absorbing spring (903) is slidably connected to the buffer plate (904), one side surface of the buffer plate (904) is rotatably connected to the connecting rod (905), the inner surface of the connecting rod (905) is rotatably connected to the pulley (906), one side surface of the damping device (901) is fixedly connected to the bottom plate (907), and one side surface of the bottom plate (907) is provided with a slide groove (908).

8. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 7, characterized in that: The outer wall size of the pulley (906) matches the inner wall size of the chute (908), and the fixed plate (902) and the bottom plate (907) are distributed in parallel.

9. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 1, characterized in that: The fuse mechanism (10) comprises a contact blade (1001), an insulating jacket (1002), a cap (1003), a fuse (1004) and a quartz sand layer (1005); the contact blade (1001) is slidably connected to the inner surface of the groove (802); one side surface of the contact blade (1001) is fixedly connected to the insulating jacket (1002); one side surface of the insulating jacket (1002) is fixedly connected to the cap (1003); the inner side of the insulating jacket (1002) is fixedly connected to the fuse (1004); and the inner side of the insulating jacket (1002) is filled with a quartz sand layer (1005).

10. The anti-harmonic capacitor with overvoltage and undervoltage protection according to claim 9, characterized in that: The outer wall dimensions of the contact blade (1001), the insulating jacket (1002) and the cap (1003) match the inner wall dimensions of the groove (802), and the outer wall dimension of the end of the cap (1003) away from the protective gate (801) matches the inner wall dimension of the fixing groove (808).

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