A magnetic field extinction switch protection device

Abstract

The utility model provides a kind of de-excitation switch protection device, comprising: protective cover, top is equipped with rubber pad, and rubber pad is used to protect the collision when protective cover overturns;Clamping mechanism, including the clamping plate that is moved translation on fixed block, and the elastic member for rebounding clamping plate is equipped on fixed block, to realize the rebound after clamping plate is extruded elastic member when protective cover overturns, and clamping tightly protective cover;Flip mechanism, including the limiting member that is movably sleeved on rotating shaft, rotating shaft is rotatably connected to protective cover, and limiting member is used to limit the position of protective cover.The present application has effective dust prevention, improves operating stability, avoids the jamming failure caused by dust;Stable structure, ensure long-term protection, effectively resist vibration or external collision in the operation of equipment, prevent protective cover loosening or displacement;Convenient operation, realize quick opening, without disassembling or handling protective cover, greatly simplify maintenance operation process, improve repair efficiency;Tool-free disassembly, improve maintenance efficiency and other advantages.

Description

Technical Field

[0001] This utility model relates to the field of demagnetizing switch protection devices, and in particular to a demagnetizing switch protection device. Background Technology

[0002] The demagnetizing switch is a key safety device in the generator excitation system. It is used to quickly cut off the rotor excitation current during faults or shutdowns, rapidly dissipating the magnetic field energy in the demagnetizing resistor to achieve rapid demagnetization. Its main functions are to prevent fault escalation, suppress overvoltage, and protect the generator and power grid equipment. Due to the large rotor inductance and high energy storage, ordinary switches cannot safely disconnect the rotor; therefore, a dedicated demagnetizing switch must be used in conjunction with a demagnetizing resistor to complete demagnetization within tens to hundreds of milliseconds, ensuring the safe and stable operation of the power system.

[0003] A search revealed that Chinese utility model patent CN 219144015 U discloses a demagnetizing switch protection device, specifically relating to the field of demagnetizing switch protection technology. The device includes a first rectangular frame plate, with a second rectangular frame plate mounted on one side of the first rectangular frame plate. A guiding protection mechanism is installed inside the first rectangular frame plate. The guiding protection mechanism includes a first guide rod installed inside the first rectangular frame plate, and a first connecting slider is slidably fitted onto the outer wall of the first guide rod. This utility model, by setting up a guiding protection mechanism, guides the first connecting slider downwards along the inner wall of the first rectangular frame plate and the outer wall of the first guide rod, and the second connecting slider downwards along the inner wall of the second rectangular frame plate and the outer wall of the second guide rod. The protective cover can achieve a tight, downward, and sealed fit to the entire exterior of the demagnetizing switch, resulting in better sealing, preventing dust and impurities from accumulating at the connection points of the demagnetizing switch, avoiding damage to the demagnetizing switch, and improving durability.

[0004] However, this method has many drawbacks. It needs to be installed inside the distribution box. In factories with heavy dust, dust can easily enter the entire demagnetizing switch, causing it to jam when the demagnetizing switch cuts off current protection, affecting its normal use and resulting in poor protection. Utility Model Content

[0005] The main purpose of this utility model is to provide a protection device for a demagnetizing switch, which solves the problem of protecting the main body of the demagnetizing switch.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a demagnetizing switch protection device, comprising: The protective cover has a rubber pad on top, which is used to protect the cover from collisions when it is flipped over. The clamping mechanism includes a clamping plate that moves movably on a fixed block, and an elastic element on the fixed block for the clamping plate to spring back, so that when the protective cover is flipped, the clamping plate moves downward to squeeze the elastic element and then springs back, thus clamping the protective cover. The flip-top mechanism includes a limiting member movably mounted on a rotating shaft, the rotating shaft being rotatably connected to a protective cover, and the limiting member being used to restrict the position of the protective cover.

[0007] In the preferred embodiment, the protective cover is rotatably connected to the mounting plate, each corner of the mounting plate is provided with a mounting hole, and the bottom surface of the protective cover is provided with a slot, in which the retaining plate is engaged.

[0008] In the preferred embodiment, the front of the protective cover is provided with a transparent observation window.

[0009] In the preferred embodiment, a rectangular groove is provided on the top surface of the fixing block, and a sliding groove is provided at the bottom of the rectangular groove. The width of the sliding groove is larger than the width of the rectangular groove. The lower end of the card plate is slidably disposed in the sliding groove, and the upper end of the card plate is movably disposed in the rectangular groove. A through hole is provided at the bottom of the sliding groove.

[0010] In the preferred embodiment, the side of the mounting plate that houses the protective cover is provided with an annular rubber ring.

[0011] In the preferred embodiment, a second inclined surface is provided on one side of the card plate, and a first inclined surface is provided on one side of the card slot. The second inclined surface and the first inclined surface are configured to cooperate with each other. The second inclined surface is used to facilitate the card slot on the protective cover to slide into the card plate.

[0012] In the preferred embodiment, the elastic element includes a first spring, which is located in the slide groove and its two ends are fixedly connected to the slide groove and the bottom surface of the card plate, respectively.

[0013] In the preferred embodiment, the clamping mechanism further includes a pull rope, one end of which is fixedly connected to the bottom surface of the clamping plate, and the other end passes through the first spring and the through hole and extends to the outside of the fixing block. A connecting ring is fixedly connected to the other end of the pull rope.

[0014] In the preferred embodiment, the flip-top mechanism includes a support plate rotatably connected to one end of a rotating shaft, and a connecting plate fixedly connected to both sides of the protective cover. The side of the support plate is fixedly connected to the mounting plate, and the other end of the rotating shaft is fixedly connected to the connecting plate.

[0015] In the preferred embodiment, the limiting component includes a second spring, which is movably sleeved on the rotating shaft.

[0016] The beneficial effects of this invention, a demagnetizing switch protection device, are as follows: 1. Effective dust prevention and improved operational stability: By setting a close-fitting protective cover on the mounting plate, a complete external shield is formed for the main body of the demagnetizing switch, which can effectively prevent dust and impurities in the factory environment from entering the equipment or accumulating at the connection parts, thus preventing jamming failures caused by dust from the source and significantly improving the operational stability and reliability of the demagnetizing switch in harsh environments with a lot of dust. 2. Sturdy structure, ensuring long-term protection: The protective cover is firmly fixed at the bottom through a clamping mechanism. Under the elastic action of the first spring, the top of the clamping plate is continuously pressed tightly into the groove of the protective cover, ensuring that the protective cover is always in close contact with the mounting plate, effectively resisting vibration or external collision during equipment operation, preventing the protective cover from loosening or shifting, and ensuring long-term reliable dustproof effect. 3. Convenient operation and quick opening: When inspection or maintenance is required, simply pull the pull rope to move the card plate down and disengage it from the slot, releasing the protective cover; then the flip-top mechanism drives the protective cover to automatically flip up and open from the top axis, quickly exposing the main body of the demagnetizing switch. There is no need to disassemble or move the protective cover, which greatly simplifies the maintenance operation process and improves maintenance efficiency. 4. Tool-free installation and removal, improving maintenance efficiency: The clamping mechanism is reasonably designed so that the entire fixing and releasing process can be completed without the use of any tools, enabling the rapid installation and opening of the protective cover. This reduces the technical threshold and time cost of maintenance, making it particularly suitable for industrial scenarios that require frequent inspection or operation, and improving the maintainability of the equipment. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a structural diagram of the main body of the demagnetizing switch of this utility model; Figure 3 This is a structural diagram of the card mounting mechanism of this utility model; Figure 4 This is a structural diagram of the protective cover of this utility model; Figure 5 This is a structural diagram of the fixing block of this utility model.

[0018] In the diagram: 1. Mounting plate; 11. Mounting hole; 2. Protective cover; 21. Slot; 211. First inclined surface; 3. Transparent observation window; 4. Rubber ring; 5. Rubber pad; 6. Connecting ring; 7. Mounting mechanism; 71. Fixing block; 711. Rectangular groove; 712. Slide groove; 713. Through hole; 72. Card plate; 721. Second inclined surface; 73. First spring; 74. Pull rope; 8. Flip cover mechanism; 81. Support plate; 82. Connecting plate; 83. Rotating shaft; 84. Second spring; 9. Main body of demagnetizing switch. Detailed Implementation

[0019] like Figure 1-5 As shown, a demagnetizing switch protection device includes: The protective cover 2 has a rubber pad 5 on top, which is used to protect the protective cover 2 from collisions when it is flipped over; The clamping mechanism 7 includes a clamping plate 72 that moves movably on the fixing block 71, and an elastic element on the fixing block 71 for rebounding the clamping plate 72, so that when the protective cover 2 is flipped, the clamping plate 72 moves downward to squeeze the elastic element and then rebounds, thus clamping the protective cover 2. The flip-top mechanism 8 includes a limiting member movably mounted on a rotating shaft 83, which is rotatably connected to the protective cover 2. The limiting member is used to restrict the position of the protective cover 2.

[0020] Furthermore, the rubber pad 5 on the top of the protective cover 2 can prevent the protective cover 2 from colliding with the mounting plate 1 when it is flipped, and can also extend the service life of the protective cover 2. The protective cover 2 is a hollow shell in the middle, and an opening is machined on one side. The opening on the protective cover 2 faces the mounting plate 1. The protective cover 2 protects the main body 9 of the demagnetizing switch inside, forming a comprehensive external shielding protection for the main body 9 of the demagnetizing switch. The protective cover 2 can effectively prevent dust and impurities in the factory environment from entering the interior of the demagnetizing switch or accumulating at its connection points, thus preventing the demagnetizing switch jamming failure caused by dust from the source, significantly improving the operational stability of the demagnetizing switch in harsh dusty environments, and extending the service life of the demagnetizing switch. The locking mechanism 7 can lock the protective cover 2. When the main body 9 of the demagnetizing switch needs to be repaired, the pull rope 74 connected to the locking plate 72 can be pulled down to open the protective cover 2. The flip-top mechanism 8 facilitates the flipping and limiting of the protective cover 2.

[0021] The protective cover 2 is rotatably connected to the mounting plate 1. Each corner of the mounting plate 1 is provided with a mounting hole 11. The bottom surface of the protective cover 2 is provided with a slot 21, and the card plate 72 is locked in the slot 21.

[0022] Furthermore, the protective cover 2 can be freely flipped on the mounting plate 1 via the flip-top mechanism 8. Each corner of the mounting plate 1 is provided with a mounting hole 11, through which a screw passes. The mounting plate 1 can be mounted on the wall with screws. The bottom surface of the protective cover 2 is machined with a slot 21 so that after the protective cover 2 covers the demagnetizing switch body 9, it can be snapped into the mounting mechanism 7 through the slot 21. The locking plate 72 provided in the mounting mechanism 7 is snapped into the slot 21.

[0023] The protective cover 2 has a transparent observation window 3 on its front.

[0024] Furthermore, the transparent observation window 3 on the front of the protective cover 2 allows staff to directly observe the operating status of the main body 9 of the demagnetizing switch, such as the brightness of the indicator lights and whether the wiring connections are loose, without having to pull the rope 74 to open the protective cover 2. This avoids dust from entering due to frequent opening of the protective cover 2, while also reducing unnecessary operating steps and improving inspection efficiency.

[0025] The top surface of the fixed block 71 has a rectangular groove 711, the bottom of the rectangular groove 711 has a sliding groove 712, the width of the sliding groove 712 is larger than the width of the rectangular groove 711, the lower end of the card plate 72 is slidably disposed in the sliding groove 712, the upper end of the card plate 72 is movably disposed in the rectangular groove 711, and the bottom of the sliding groove 712 has a through hole 713.

[0026] Furthermore, the clamping mechanism 7 includes a fixing block 71, a clamping plate 72, a first spring 73, and a pull rope 74. The clamping mechanism 7 is located on the bottom surface of the protective cover 2 and is fixedly connected to the mounting plate 1. The fixing block 71 is fixedly connected to the mounting plate 1. A rectangular groove 711 is machined on the top surface of the fixing block 71. A sliding groove 712 is machined downward from the rectangular groove 711. The width and height of the sliding groove 712 are larger than the rectangular groove 711 to facilitate the extension and retraction of the clamping plate 72 in the sliding groove 712. A sliding plate provided at the lower end of the clamping plate 72 is located in the sliding groove 712. The sliding plate can prevent the clamping plate 72 from detaching from the sliding groove 712. A through hole 713 is machined on the bottom surface of the sliding groove 712, leading to the outside of the fixing block 71. The through hole 713 is used for the pull rope 74. One end of the pull rope 74 is fixedly connected to the bottom surface of the clamping plate 72. When it is necessary to open the protective cover 2, the pull rope 74 is pulled to retract the clamping plate 72 into the sliding groove 712.

[0027] The mounting plate 1 has an annular rubber ring 4 on one side where the protective cover 2 is installed.

[0028] Furthermore, a rubber ring 4 is installed on the side of the mounting plate 1 facing the opening of the protective cover 2. When the opening of the protective cover 2 and the rubber ring 4 are in close contact, they can fill the tiny gaps between the protective cover 2 and the mounting plate 1. Fine dust and fibrous impurities in the factory environment can easily seep in through the gaps of traditional metal parts, but the elastic deformation ability of the rubber can completely seal these gaps, blocking the entry path of impurities from the source, further reducing the probability of dust accumulating at the connection of the demagnetizing switch, significantly improving the protection level in harsh dust environments, and extending the fault-free operation cycle of the demagnetizing switch.

[0029] A second inclined surface 721 is provided on one side of the card plate 72, and a first inclined surface 211 is provided on one side of the card slot 21. The second inclined surface 721 and the first inclined surface 211 are configured to cooperate with each other. The second inclined surface 721 is used to facilitate the card slot 21 provided on the protective cover 2 to slide into the card plate 72.

[0030] Furthermore, a second inclined surface 721 is machined on one side of the card plate 72, and a first inclined surface 211 is machined on one side of the card slot 21. When the protective cover 2 is flipped down, the lower end of the protective cover 2 abuts against the second inclined surface 721 and moves the card plate 72 down. When the card plate 72 is inserted into the card slot 21, the protective cover 2 is locked.

[0031] The elastic element includes a first spring 73, which is located in the slide groove 712 and its two ends are fixedly connected to the bottom surface of the slide groove 712 and the card plate 72, respectively.

[0032] Furthermore, a first spring 73 is installed between the bottom surface of the clamping plate 72 and the slide groove 712. When the clamping plate 72 retracts downwards, the first spring 73 is compressed and stores energy. When the clamping plate 72 is aligned with and embedded in the slot 21, the first spring 73 releases its elastic potential energy, quickly rebounds, and pushes the clamping plate 72 to securely engage in the slot 21, achieving positioning and locking. This structure not only improves the accuracy and convenience of assembly but also enhances the stability of the connection, effectively preventing loosening and ensuring reliable operation of the mechanism.

[0033] The clamping mechanism 7 also includes a pull rope 74. One end of the pull rope 74 is fixedly connected to the bottom surface of the clamping plate 72, and the other end passes through the first spring 73 and the through hole 713 and extends to the outside of the fixing block 71. The other end of the pull rope 74 is fixedly connected to a connecting ring 6.

[0034] Furthermore, the clamping mechanism 7 also includes a pull rope 74, one end of which is fixed to the bottom surface of the clamping plate 72, and the other end passes through the inside of the first spring 73 and the through hole 713 on the fixing block 71, extending to the outside of the fixing block and connected to a connecting ring 6. By pulling the connecting ring 6, the pull rope 74 can be driven, thereby pulling the clamping plate 72 to overcome the elastic force of the first spring 73 and retract, realizing the separation of the clamping plate 72 from the clamping slot 21, and also facilitating the removal of the protective cover 2 from the clamping plate 72 and its flipping by the flipping mechanism 8. This design is compact, easy to operate, and improves the flexibility and practicality of the mechanism.

[0035] The flip-top mechanism 8 includes a support plate 81 rotatably connected to one end of a rotating shaft 83, and a connecting plate 82 fixedly connected to both sides of the protective cover 2. The side of the support plate 81 is fixedly connected to the mounting plate 1, and the other end of the rotating shaft 83 is fixedly connected to the connecting plate 82.

[0036] Furthermore, two connecting plates 82 are fixed to the left and right outer walls of the protective cover 2, respectively, while the side of the support plate 81 is fixedly connected to the mounting plate 1 to provide structural support. One end of the rotating shaft 83 is fixedly connected to the inner side of the support plate 81, and this shaft end is rotatably connected to a bearing provided on the support plate 81; the other end of the rotating shaft 83 passes through the limiting member and is fixedly connected to the connecting plates 82 on both sides, forming a stable rotation fulcrum. Through this structure, the protective cover 2 can be smoothly opened and closed around the rotating shaft 83, facilitating equipment maintenance and repair, while ensuring flexible and reliable opening and closing action, thus improving the practicality and safety of the overall structure.

[0037] The limiting component includes a second spring 84, which is movably sleeved on the rotating shaft 83.

[0038] Furthermore, the limiting component includes a second spring 84, which is movably sleeved on the outer periphery of the rotating shaft 83, located between the connecting plate 82 and the support plate 81. The two ends of the second spring 84 abut against the support plate 81 and the connecting plate 82 respectively, providing elastic resistance during the opening and closing process, thus buffering the impact and preventing damage to the protective cover due to excessive rotation. Simultaneously, the spring force helps maintain the stable position of the opening, enabling automatic return or limiting functions, improving operational smoothness and safety.

[0039] In summary, the implementation principle of this embodiment is as follows: the device achieves efficient protection and convenient operation of the main body 9 of the demagnetizing switch through the coordinated operation of the protective cover 2, the flip-top mechanism 8, and the locking mechanism 7. The open end of the protective cover 2 is fitted to the mounting plate 1 and the gap is sealed with the rubber ring 4. A transparent observation window 3 is provided at the front end, which can be used to inspect the operation of the equipment when it is not open. In the locking mechanism 7, the locking plate 72 is locked into the bottom slot 21 of the protective cover 2 under the action of the first spring 73, achieving automatic locking; its front end is provided with an inclined surface. When closing, pressing down on the protective cover 2 can automatically compress the locking plate 72 through the inclined surface. After it is in place, the first spring 73 rebounds to complete the locking, without the need for manual operation of the pull rope. During maintenance, pulling the pull rope 74 moves the locking plate 72 down and disengages it from the slot 21, releasing the protective cover 2; the second spring 84 in the flip-top mechanism 8 then releases its elastic force, driving the rotating shaft 83 and the connecting plate 82, so that the protective cover 2 automatically flips upward and opens with the top as the axis, exposing the main body 9 of the demagnetizing switch. When closing, the operation is reversed, and the second spring 84 is compressed and stored. The entire process is simple to operate and can be completed by a single person. It also has dustproof, buffer, and anti-collision functions, which significantly improves the stability and maintenance efficiency of the equipment in dusty environments.

[0040] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A demagnetizing switch protection device, characterized in that it comprises: The protective cover (2) has a rubber pad (5) on top, which is used to protect the protective cover (2) from collision when it is flipped over; The clamping mechanism (7) includes a clamping plate (72) that moves movably on the fixing block (71) and an elastic element provided on the fixing block (71) for the rebound clamping plate (72) so that when the protective cover (2) is flipped, the clamping plate (72) moves downward to squeeze the elastic element and then rebounds, thus clamping the protective cover (2). The flip-top mechanism (8) includes a limiting member movably mounted on a rotating shaft (83), the rotating shaft (83) being rotatably connected to the protective cover (2), and the limiting member being used to restrict the position of the protective cover (2).

2. A magnetic field elimination switch protection device according to claim 1, characterized in that The protective cover (2) is rotatably connected to the mounting plate (1). Each corner of the mounting plate (1) is provided with mounting holes (11). The bottom surface of the protective cover (2) is provided with a slot (21), and the card plate (72) is locked in the slot (21).

3. A magnetic field elimination switch protection device according to claim 1, characterized in that The protective cover (2) has a transparent observation window (3) on the front.

4. The magnetic field elimination switch protection device according to claim 1, characterized in that, The top surface of the fixed block (71) is provided with a rectangular groove (711), and the bottom of the rectangular groove (711) is provided with a sliding groove (712). The width of the sliding groove (712) is larger than that of the rectangular groove (711). The lower end of the card plate (72) is slidably disposed in the sliding groove (712), and the upper end of the card plate (72) is movably disposed in the rectangular groove (711). The bottom of the sliding groove (712) is provided with a through hole (713).

5. A magnetic field elimination switch protection device according to claim 2, characterized in that The mounting plate (1) has an annular rubber ring (4) on one side of the protective cover (2).

6. A magnetic field elimination switch protection device according to claim 2, characterized in that A second inclined surface (721) is provided on one side of the card plate (72), and a first inclined surface (211) is provided on one side of the card slot (21). The second inclined surface (721) and the first inclined surface (211) are configured to cooperate with each other. The second inclined surface (721) is used to facilitate the card slot (21) provided on the protective cover (2) to slide into the card plate (72).

7. A magnetic field elimination switch protection device according to claim 4, characterized in that The elastic element includes a first spring (73), which is located in the slide groove (712) and its two ends are fixedly connected to the bottom surface of the slide groove (712) and the card plate (72) respectively.

8. A magnetic field elimination switch protection device according to claim 4, characterized in that The clamping mechanism (7) also includes a pull rope (74), one end of which is fixedly connected to the bottom surface of the clamping plate (72), and the other end passes through the first spring (73) and the through hole (713) and extends to the outside of the fixing block (71). The other end of the pull rope (74) is fixedly connected to a connecting ring (6).

9. The magnetic field elimination switch protection device according to claim 1, characterized in that, The flip-top mechanism (8) includes a support plate (81) rotatably connected to one end of a rotating shaft (83) and a connecting plate (82) fixedly connected to both sides of the protective cover (2). The side of the support plate (81) is fixedly connected to the mounting plate (1), and the other end of the rotating shaft (83) is fixedly connected to the connecting plate (82).

10. The magnetic field elimination switch protection device according to claim 1, characterized in that, The limiting component includes a second spring (84), which is movably sleeved on the rotating shaft (83).

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