Novel arc extinguishing device and environmentally friendly switchgear

Abstract

This invention relates to a novel arc-extinguishing device and an environmentally friendly switchgear, comprising: an arc-extinguishing device, which includes a housing assembly comprising an upper half-shell, a lower half-shell, and a connecting cylinder; the connecting cylinder is threaded to the inner side of the upper half-shell, and the lower half-shell is threaded to the bottom of the connecting cylinder. By using a movable ring made of elastic steel material, elastic buffering is achieved during the opening and closing contact process, effectively reducing the rigid impact generated by the movement of the moving terminal during closing, avoiding wear, displacement, and loosening of the terminal due to long-term impact, improving the operational stability of the equipment, and extending the service life of the device.

Description

Technical Field

[0001] This invention belongs to the field of arc extinguishing devices, specifically a novel arc extinguishing device and an environmentally friendly switchgear. Background Technology

[0002] Environmentally friendly switchgear is a core component of power distribution systems, relying on built-in arc-extinguishing devices to control circuit opening and closing. Existing arc-extinguishing devices are technologically mature, highly versatile, easy to assemble, and cost-effective. They can quickly extinguish opening and closing arcs, effectively preventing arc erosion and short-circuit faults, and can meet basic switching requirements under normal operating conditions. They have been widely used in various power distribution scenarios.

[0003] However, the existing structure has obvious technical defects. The contact structure of the moving and stationary terminals lacks a dedicated buffer and limit structure. When the circuit is opened and closed, the moving terminal rigidly impacts the stationary terminal. Long-term operation can easily cause terminal wear, displacement, and structural loosening. Equipment vibration can also lead to contact misalignment, which greatly reduces equipment stability and service life and increases operation and maintenance costs. Existing terminals conduct electricity directly through metal contact surfaces. During the installation of components inside the vacuum chamber, corrosive liquids may come into contact with the components. During use, slow, minute gas release and residual gas from contact arc ionization can slowly generate a thin oxide layer. Collisions can cause wear and create gaps. Furthermore, the lack of an active resistance reduction structure leads to a gradual increase in contact resistance, which may result in more severe heat generation and increased energy consumption during operation. This seriously affects the safety and continuity of the power distribution system. Therefore, a new arc-extinguishing device and an environmentally friendly switchgear are proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: existing terminals conduct electricity directly through metal contact surfaces, components inside the vacuum chamber may be contaminated with corrosive liquids during installation, slow and minute gas release during use, residual gas from contact arc ionization will slowly generate a thin oxide layer, collisions will cause wear and create gaps, and there is no active resistance reduction structure, which leads to a gradual increase in contact resistance, which may result in more serious heat generation and increased energy consumption during operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a novel arc-extinguishing device and an environmentally friendly switchgear, comprising: An arc-extinguishing device includes a housing assembly, which includes an upper half-shell, a lower half-shell, and a connecting cylinder. The inner side of the upper half-shell is threadedly connected to the top of the connecting cylinder, and the bottom of the connecting cylinder is threadedly connected to the lower half-shell. The power connection mechanism includes a moving terminal, a stationary terminal, a first connecting post, and a second connecting post. The moving terminal is movably connected to the inner side of the upper shell. The first connecting post is located above the moving terminal, and the second connecting post is located at the top of the first connecting post. The stationary terminal is located on the inner side of the lower shell. The stationary terminal and the moving terminal are movably abutted against each other. Both the moving terminal and the stationary terminal are located inside the connecting cylinder. The shell assembly also includes a clamping ring and a sealing cylinder. The clamping ring is sleeved at the bottom of the lower shell, and the sealing cylinder is connected to the lower shell through the clamping ring.

[0007] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, a second energizing circular plate is provided on the upper side of the stationary terminal, and a first energizing circular plate is provided on the lower side of the moving terminal, with the second energizing circular plate and the first energizing circular plate movably abutting against each other.

[0008] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, an installation ring frame is provided in the middle of the inner side of the lower half shell, an installation base frame is provided at the bottom of the stationary terminal, and an installation plate is provided at the bottom of the installation base frame. The installation ring frame is snapped into the installation plate of the installation base frame and fixed with bolts.

[0009] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, the connection mechanism also includes a sealing structure, which includes a sealing ring seat, a bellows, a locking sleeve, and a connecting cup. A connecting hole is provided at the top of the upper shell, a sealing ring seat is provided inside the connecting hole, a bellows is provided below the sealing ring seat, a connecting cup is provided at the bottom end of the bellows, a locking sleeve is provided at the bottom end of the second connecting post, the locking sleeve abuts against the inner side of the bottom of the connecting cup, the second connecting post is movably inserted into the sealing ring seat, and the second connecting post extends into the bellows.

[0010] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, the connection mechanism also includes a snap-fit ​​ring, with the outer side of the bottom of the connecting bowl abutting against the snap-fit ​​ring, and the top of the connecting post being snapped with the snap-fit ​​ring.

[0011] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, an annular limiting groove is provided on the inner side of the top of the upper shell, and a movable ring is provided on the outer side of the connecting bowl. The movable ring is movably connected to the inner wall of the limiting groove. The edge of the movable ring is blocked by the limiting groove. The movable ring is made of elastic steel material, which realizes elastic buffering during movement.

[0012] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, a circular squeezing chamber is provided in the middle of the moving terminal, and an annular liquid storage chamber is provided at the bottom of the moving terminal. The axis of the annular liquid storage chamber is collinear with the axis of the circular squeezing chamber. A liquid transfer assembly is movably connected to the inner side of the annular liquid storage chamber, and a plugging assembly is movably connected inside the circular squeezing chamber.

[0013] As a preferred technical solution for a novel arc-extinguishing device and environmentally friendly switchgear, the liquid transfer assembly includes an annular disk I, an annular disk II, drainage holes, blind grooves, connecting membranes, and through grooves. Two annular disks II and annular disk I are slidably connected to the inner side of the annular storage chamber. Annular disk II is located above annular disk I. Several connecting channels are provided between the circular squeezing chamber and the annular storage chamber. Several liquid outlet structures are evenly arranged on annular disk I, corresponding to the connecting channels. The through grooves correspond to the liquid outlet structures. Several blind grooves are evenly arranged on the upper side of annular disk I, each corresponding to a liquid outlet structure. Each liquid outlet structure consists of several closely arranged drainage holes. A connecting membrane is provided between annular disk II and annular disk I. The outer edge of the connecting membrane is connected to the edge of annular disk II, and the inner side of the connecting membrane is fixedly connected to the center of annular disk I. Several through grooves are evenly opened on annular disk II, alternating with blind grooves. The bottom of the annular storage chamber contains conductive drag-reducing liquid, and several nozzle channels are opened in the center of the circular squeezing chamber.

[0014] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, the plugging plate assembly includes a plugging plate disc and a pressure plate. The inner bottom wall of the circular squeezing chamber is set as a spherical surface with a concave center and an upturned edge. The lower side of the plugging plate disc cooperates with the inner bottom wall of the circular squeezing chamber. Several pressure plates are set on the upper side of the plugging plate disc. The circular squeezing chamber is slidably connected to the pressure plate and the plugging plate disc. The pressure plate presses against the plugging plate disc. An air cavity is opened on the inner side of the plugging plate disc. An elastic membrane is sealed at the opening of the air cavity. High-pressure air is set inside the air cavity. The air and the elastic membrane form an elastic structure.

[0015] As a preferred technical solution for a new type of arc extinguishing device and environmentally friendly switchgear, the environmentally friendly switchgear adopts this arc extinguishing device, and the housing of the environmentally friendly switchgear is made of recyclable metal or ceramic materials, avoiding the use of polymer materials including plastics.

[0016] The beneficial effects of the novel arc-extinguishing device and environmentally friendly switchgear of the present invention are as follows: by using elastic steel material to make the movable ring, elastic buffering is achieved during the opening and closing contact process, which effectively weakens the rigid impact generated by the movement of the moving terminal during closing, avoids the problem of wear, displacement and loosening of the terminal due to long-term impact, improves the operational stability of the equipment, and extends the service life of the device.

[0017] By using the connecting bowl and the movable ring together, the movement stroke of the moving terminal is precisely limited, the offset and shaking of the terminal during operation are restricted, the contact misalignment caused by vibration is eliminated, and the contact position of the moving and stationary terminals is accurate and the alignment is stable.

[0018] By using the liquid transfer component in conjunction with the plugging component, a small-dose spray release of conductive drag-reducing liquid is achieved. The sprayed conductive drag-reducing liquid can effectively fill the micro gaps on the terminal contact surface, peel off and remove the oxide film on the contact, significantly reduce the contact resistance of the moving and stationary terminals, reduce heat generation and energy loss during power-on, and avoid local overheating and arc reignition.

[0019] By using a sealed structure in conjunction with the housing components, the arc-extinguishing working area is sealed and protected, isolating it from external dust, moisture, and air oxidation, continuously ensuring the conductivity of the terminal contact surfaces, and further improving the safety and continuity of the long-term operation of the switchgear. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the front of the present invention; Figure 3 This is a three-dimensional structural diagram of the power connection mechanism of the present invention; Figure 4 For the present invention Figure 2 A partially enlarged structural diagram of part A in the middle; Figure 5 This is a schematic diagram of the internal structure of the moving terminal of the present invention; Figure 6 This is a three-dimensional structural diagram of the moving terminal of the present invention; Figure 7 This is a three-dimensional structural diagram of the blocking plate disc of the present invention; Figure 8 This is a schematic diagram of the structure of the liquid transfer assembly of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the structure of the liquid transfer assembly of the present invention. Figure 2 .

[0021] Reference numerals: 100, Housing assembly; 101, Upper half-shell; 102, Lower half-shell; 103, Hoop ring; 104, Sealing cylinder; 105, Connecting cylinder; 106, Shielding cylinder; 107, Mounting ring frame; 200, Power connection mechanism; 201, Moving terminal; 202, Stationary terminal; 203, Mounting base frame; 204, Nozzle channel; 205, Power connection circular plate one; 206, Connecting post one; 207, Sealing ring seat; 208, Connecting post two; 209, Connecting cup; 210, Locking sleeve; 211, Snap-fit ​​ring; 212. 213. Corrugated pipe; 214. Movable ring; 215. Electrically connected circular plate II; 300. Resistance reduction assembly; 301. Circular squeezing chamber; 302. Annular storage chamber; 303. Injection channel; 304. Pressure plate; 305. Blocking plate disc; 306. Blocking bolt; 307. Annular disc I; 308. Blind groove; 309. Drainage hole; 310. Connecting membrane; 311. Air cavity; 312. Elastic membrane; 313. Through groove; 314. Annular disc II; 315. Blocking rubber head; 316. Fitting ring; 317. Connecting channel. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0026] Example 1: As Figures 1-9 As shown, this invention proposes a novel arc-extinguishing device and an environmentally friendly switchgear, comprising: An arc extinguishing device includes a housing assembly 100, which includes an upper half-shell 101, a lower half-shell 102, and a connecting cylinder 105. The inner side of the upper half-shell 101 is threadedly connected to the top of the connecting cylinder 105, and the bottom of the connecting cylinder 105 is threadedly connected to the lower half-shell 102. The power connection mechanism 200 includes a moving terminal 201, a stationary terminal 202, a first connecting post 206, and a second connecting post 208. The moving terminal 201 is movably connected to the inner side of the upper shell 101. The first connecting post 206 is provided on the upper side of the moving terminal 201, and the second connecting post 208 is provided at the top of the first connecting post 206. The stationary terminal 202 is provided on the inner side of the lower shell 102. The stationary terminal 202 is movably abutting against the moving terminal 201. The shell assembly 100 also includes a clamping ring 103 and a sealing cylinder 104. The clamping ring 103 is sleeved on the bottom end of the lower shell 102, and the sealing cylinder 104 is connected to the lower shell 102 through the clamping ring 103. Two annular limiting strips are provided on the inner side of the connecting cylinder 105, and a shielding cylinder 106 is provided between the two annular limiting strips. The moving terminal 201 and the stationary terminal 202 are both located inside the shielding cylinder 106. The shielding cylinder 106 is made of multiple nested copper cylinders and can shield most of the electromagnetic field inside the shielding cylinder 106. The edges at both ends of the shielding cylinder 106 are tapered.

[0027] The lower half shell 102 and the sealing cylinder 104 are locked together by the clamping ring 103 to achieve rapid sealing assembly of the bottom of the shell.

[0028] A second power-connecting circular plate 214 is provided on the upper side of the stationary terminal 202, and a first power-connecting circular plate 205 is provided on the lower side of the moving terminal 201. The second power-connecting circular plate 214 and the first power-connecting circular plate 205 are in movable contact.

[0029] By engaging and contacting the first and second electrical circular plates 205, the conductive contact area of ​​the moving and stationary terminals is increased, thereby reducing the basic contact resistance.

[0030] A mounting ring 107 is provided in the middle of the inner side of the lower half shell 102, and a mounting base 203 is provided at the bottom of the stationary terminal 202. A mounting plate is provided at the bottom end of the mounting base 203. The mounting ring 107 is engaged with the mounting plate of the mounting base 203 and fixed with bolts.

[0031] By fixing the mounting ring 107 to the mounting base 203, the stationary terminal is stably limited and fixed, and is not easy to deviate or shake during operation.

[0032] The power connection mechanism 200 also includes a sealing structure, which comprises a sealing ring seat 207, a bellows 212, a locking sleeve 210, and a connecting cup 209. A connecting hole is provided at the top of the upper shell 101, and the sealing ring seat 207 is located inside the connecting hole. The bellows 212 is located below the sealing ring seat 207, and the connecting cup 209 is located at the bottom end of the bellows 212. The locking sleeve 210 is located at the bottom end of the connecting post 208, and the locking sleeve 210 abuts against the inner side of the bottom of the connecting cup 209. The connecting post 208 is movably inserted into the sealing ring seat 207, and extends into the bellows 212. The connecting cup 209 is made of insulating material.

[0033] The sealing structure, consisting of bellows 212, sealing ring seat 207, and connecting bowl 209, seals the gap at the top of the upper shell, preventing moisture and dust from entering the shell.

[0034] The power connection mechanism 200 also includes a snap ring 211, the outer side of the bottom of the connecting bowl 209 abuts against the snap ring 211, and the top of the connecting post 206 is snapped with the snap ring 211.

[0035] The snap ring 211 secures the connecting post 206 to the connecting cup 209, preventing the sealing structure from loosening and improving overall sealing stability. The snap ring 211 cooperates with the locking sleeve 210 to lock the connecting cup 209.

[0036] An annular limiting groove is provided on the inner side of the top of the upper shell 101, and a movable ring 213 is provided on the outer side of the connecting bowl 209. The movable ring 213 is movably connected to the inner wall of the limiting groove, and the edge of the movable ring 213 is blocked by the limiting groove.

[0037] The movable ring 213 cooperates with the annular limiting groove to limit the movement of the connecting bowl 209 and prevent the moving terminal from overtravel.

[0038] A circular squeezing chamber 301 is provided in the middle of the moving terminal 201, and an annular liquid storage chamber 302 is provided at the bottom of the moving terminal 201. The axis of the annular liquid storage chamber 302 is collinear with the axis of the circular squeezing chamber 301. A liquid transfer assembly is movably connected to the inner side of the annular liquid storage chamber 302, and a plugging assembly is movably connected inside the circular squeezing chamber 301.

[0039] By coaxially setting the circular squeezing chamber 301 and the annular storage chamber 302, the conductive drag-reducing liquid is vertically transported, and the liquid transport path is regular and free from deviation.

[0040] The liquid transfer assembly includes an annular disk 307, an annular disk 314, a drain hole 309, a blind groove 308, a connecting membrane 310, and a through groove 313. Two annular disks 314 and annular disk 307 are slidably connected to the inner side of the annular storage chamber 302. The annular disk 314 is located above the annular disk 307. Several connecting channels 317 are provided between the circular squeezing chamber 301 and the annular storage chamber 302. Several liquid outlet structures are evenly arranged on the annular disk 307, corresponding to the connecting channels 317. The through groove 313 corresponds to the liquid outlet structures. Several... Blind groove 308 corresponds one-to-one with liquid outlet structure. Liquid outlet structure is composed of several closely arranged drainage holes 309. A connecting membrane 310 is provided between annular disk 2 314 and annular disk 1 307. The outer edge of the connecting membrane 310 is connected to the edge of annular disk 2 314. The inner side of the connecting membrane 310 is fixedly connected to the middle of annular disk 1 307. Several through grooves 313 are evenly opened on annular disk 2 314. Through grooves 313 and blind grooves 308 are alternately distributed. The bottom of annular liquid storage cavity 302 contains conductive drag-reducing liquid. Several nozzle channels 204 are opened in the middle of circular squeezing cavity 301.

[0041] A floating extrusion structure is formed by annular disk 307, annular disk 314, and connecting membrane 310, which achieves directional delivery of conductive drag-reducing liquid by inertial extrusion.

[0042] The plugging assembly includes a plugging plate disc 305 and a pressure plate 304. The inner bottom wall of the circular squeezing cavity 301 is set as a spherical surface with a concave center and an upturned edge. The lower side of the plugging plate disc 305 cooperates with the inner bottom wall of the circular squeezing cavity 301. Several pressure plates 304 are provided on the upper side of the plugging plate disc 305. The circular squeezing cavity 301 is slidably connected to the pressure plate 304 and the plugging plate disc 305. The pressure plate 304 presses the plugging plate disc 305. An air cavity 311 is opened on the inner side of the plugging plate disc 305. An elastic membrane 312 is sealed at the opening of the air cavity 311. High-pressure air is provided on the inner side of the air cavity 311. The air and the elastic membrane 312 form an elastic structure.

[0043] The air cavity 311 and the elastic membrane 312 form an elastic reset structure, which drives the blocking plate disc 305 to reset and block the connecting channel 317 after the closing is completed.

[0044] The environmentally friendly switchgear uses this arc-extinguishing device. The housing of the environmentally friendly switchgear is made of recyclable metal or ceramic materials, avoiding the use of polymer materials including plastics, and reducing the use of non-degradable and non-recyclable materials.

[0045] The movable ring 213 is made of elastic steel. A power supply line is provided on the connecting post 208, and a connecting wire is provided on the stationary terminal 202. The top of the connecting post 208 is movably connected to the linear motion mechanism, which includes an electromagnetic switch.

[0046] The density of annular disk 314 is less than that of the conductive drag-reducing fluid, and the density of annular disk 307 is also less than that of the conductive drag-reducing fluid. This is achieved by selecting appropriate materials or by creating a cavity inside annular disk 314. Under its own weight, pressure plate 304 compresses the air inside the elastic membrane 312 on the upper side of the blocking disc 305, thus sealing the opening at the top of the connecting channel 317. A rubber outer skin is provided at the bottom of the blocking disc 305.

[0047] The specific implementation method is as follows: In a static state, annular disk 2 314 floats on the conductive drag-reducing liquid, and annular disk 1 307 sinks in the conductive drag-reducing liquid. Annular disk 2 314, annular disk 1 307, connecting membrane 310, and the inner wall of annular storage cavity 302 cooperate to form a temporary storage cavity. The conductive drag-reducing liquid enters the temporary storage cavity through the through groove 313. The linear movement mechanism controls the movement of connecting column 2 208. Connecting column 2 208 moves up and down through connecting column 1 206 and moving terminal 201. When moving terminal 201 rapidly accelerates from a static position to a working speed, during the acceleration process, due to inertia, both annular disk 2 314 and annular disk 1 307 move relative to annular storage cavity 302. As the pressure plate 304 and the blocking plate disc 305 move relative to the circular squeezing chamber 301, a slit is formed at the bottom of the blocking plate disc 305. The blocking plate disc 305 releases the closure of the connecting channel 317. The annular disc 2 314 is blocked by the inner top wall of the annular storage chamber 302 and is forced closer by the annular disc 1 307. The distance between the annular disc 1 307 and the annular disc 2 314 is shortened. The annular disc 1 307 squeezes the space of the temporary storage chamber. The conductive drag-reducing liquid in the temporary storage chamber, especially the conductive drag-reducing liquid in the blind groove 308, is thrown away and squeezed through the drain hole 309 and the connecting channel 317 to the slit below the blocking plate disc 305. The conductive drag-reducing liquid moves towards the center of the sphere in the slit. During the approach and contact between the moving terminal 201 and the stationary terminal 202, the moving terminal 201 decelerates and stops, causing the pressure plate 304, the blocking plate disc 305, the first annular disc 307, and the second annular disc 314 to return to their original positions. The blocking plate disc 305 squeezes the conductive drag-reducing liquid through the nozzle channel 204 and sprays it onto the second electrical contact disc 214 on the upper side of the stationary terminal 202, reducing the resistance when the moving terminal 201 contacts the stationary terminal 202. The conductive drag-reducing liquid is a high-temperature resistant, low-resistance material.

[0048] Example 2: Based on Example 1: The outer ring of the mounting ring 107 has several connecting holes. The clamping ring 103 clamps the lower half shell 102 and the sealing cylinder 104, so that the lower side of the lower half shell 102 is tightly fitted with the multi-layer sealing ring at the top of the sealing cylinder 104, and a sealing treatment is performed between the lower half shell 102 and the sealing cylinder 104. Basic components: 82% by mass linear perfluoropolyether (PFPE) base oil, temperature resistant above 320℃, does not carbonize at high temperatures, does not produce insulating residue, and has a stable insulating substrate; The materials used in conductive drag-reducing fluids include conductive fillers, functional additives, or polymethyl methacrylate viscosity modifiers. Conductive filler: 6% by mass of 5-30μm nano-graphene oxide micro-flakes, filling the micro-gaps of the contact, breaking the metal oxide film, constructing a continuous conductive channel, and significantly reducing contact resistance; Functional additives: 3% benzotriazole corrosion inhibitor to prevent arc corrosion of copper or silver contacts; 4% hindered phenolic composite antioxidant to inhibit high-temperature decomposition; 5% by mass of polymethyl methacrylate viscosity modifier: ensures liquid flowability, is suitable for annular liquid storage chamber spraying, and does not separate when left to stand.

[0049] The bottom end of the sealing cylinder 104 is connected to a vacuum pump, and the inner cavity formed by the upper shell 101 and the lower shell 102 is evacuated.

[0050] Example 3: Based on Example 1: The bottom end of the moving terminal 201 is provided with an injection channel 303. The top end of the injection channel 303 is connected to the annular liquid storage cavity 302. A mating ring 316 is provided at the top of the injection channel 303. A plugging bolt 306 is threadedly connected to the injection channel 303. A plugging rubber head 315 is provided at the top of the plugging bolt 306. The plugging rubber head 315 compresses the mating ring 316 to deform and block the injection channel 303.

[0051] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A novel arc quenching device characterized by: include: An arc-extinguishing device includes a housing assembly, which includes an upper half-shell, a lower half-shell, a clamping ring, a sealing cylinder, and a connecting cylinder. The inner side of the upper half-shell is threadedly connected to the top of the connecting cylinder, and the bottom of the connecting cylinder is threadedly connected to the lower half-shell. A clamping ring is fitted onto the bottom end of the lower half-shell, and the sealing cylinder is connected to the lower half-shell through the clamping ring. The power connection mechanism includes a moving terminal, a stationary terminal, a first connecting post, and a second connecting post. The moving terminal is movably connected to the inner side of the upper shell. The first connecting post is located above the moving terminal, and the second connecting post is located at the top of the first connecting post. The stationary terminal is located on the inner side of the lower shell. The stationary terminal and the moving terminal are movably abutted against each other. Both the moving terminal and the stationary terminal are located inside the connecting cylinder.

2. A new arc extinguishing device according to claim 1, characterized in that: A second power-connecting circular plate is provided on the upper side of the stationary terminal, and a first power-connecting circular plate is provided on the lower side of the moving terminal. The second power-connecting circular plate and the first power-connecting circular plate are in movable contact.

3. A new arc extinguishing device according to claim 1, characterized in that: A mounting ring is provided in the middle of the inner side of the lower half shell, and a mounting base is provided at the bottom of the stationary terminal. The mounting ring and the mounting base are engaged.

4. A new arc extinguishing device according to claim 1, characterized in that: The power connection mechanism also includes a sealing structure, which includes a sealing ring seat, a bellows, a locking sleeve, and a connecting cup. A connecting hole is provided at the top of the upper shell, a sealing ring seat is provided inside the connecting hole, a bellows is provided below the sealing ring seat, a connecting cup is provided at the bottom end of the bellows, a locking sleeve is provided at the bottom end of the second connecting post, the locking sleeve abuts against the inner side of the bottom of the connecting cup, the second connecting post is movably inserted into the sealing ring seat, and the second connecting post extends into the bellows.

5. A new arc extinguishing device according to claim 4, characterized in that: The power connection mechanism also includes a snap ring, which abuts against the outer side of the bottom of the connecting bowl, and the snap ring is snapped into the top of the connecting post.

6. A new arc extinguishing device according to claim 5, characterized in that: An annular limiting groove is provided on the inner side of the top of the upper shell, and a movable ring is provided on the outer side of the connecting bowl. The movable ring is movably connected to the inner wall of the limiting groove, and the edge of the movable ring is blocked by the limiting groove.

7. A new arc extinguishing device according to claim 1 characterized in that: A circular squeezing chamber is provided in the middle of the moving terminal, and several nozzle channels are provided in the middle of the circular squeezing chamber. An annular liquid storage chamber is provided at the bottom of the moving terminal. The axis of the annular liquid storage chamber is collinear with the axis of the circular squeezing chamber. A liquid transfer assembly is movably connected to the inner side of the annular liquid storage chamber, and a plugging assembly is movably connected to the inside of the circular squeezing chamber.

8. A new arc extinguishing device according to claim 7, characterized in that: The liquid transfer assembly includes an annular disk 1, an annular disk 2, drainage holes, blind grooves, connecting membranes, and through grooves. Two annular disks, annular disk 2 and annular disk 1, are slidably connected to the inner side of the annular storage chamber. Annular disk 2 is located above annular disk 1. Several connecting channels are provided between the circular squeezing chamber and the annular storage chamber. Several liquid outlet structures are evenly arranged on annular disk 1, corresponding to the connecting channels. The through grooves correspond to the liquid outlet structures. Several blind grooves are evenly arranged on the upper side of annular disk 1, each corresponding to a liquid outlet structure. Each liquid outlet structure consists of several closely arranged drainage holes. A connecting membrane is provided between annular disk 2 and annular disk 1. The outer edge of the connecting membrane is connected to the edge of annular disk 2, and the inner side of the connecting membrane is fixedly connected to the center of annular disk 1. Several through grooves are evenly arranged on annular disk 2, alternating with blind grooves. The bottom of the annular storage chamber contains conductive drag-reducing liquid.

9. A new arc extinguishing device according to claim 7, characterized in that: The plugging plate assembly includes a plugging plate disc and pressure plates. The inner bottom wall of the circular squeezing chamber is set as a spherical surface with a concave center and an upturned edge. The lower side of the plugging plate disc cooperates with the inner bottom wall of the circular squeezing chamber. Several pressure plates are set on the upper side of the plugging plate disc. The circular squeezing chamber is slidably connected to the pressure plates and the plugging plate disc. The pressure plates press the plugging plate disc. An air cavity is opened on the inner side of the plugging plate disc. An elastic membrane is sealed at the opening of the air cavity. High-pressure air is set inside the air cavity. The air and the elastic membrane form an elastic structure.

10. An environmentally friendly switchgear characterized by: The environmentally friendly switchgear includes the novel arc-extinguishing device as described in any one of claims 1 to 9. The housing of the environmentally friendly switchgear is made of metal or ceramic material, avoiding the use of polymer materials including plastics.

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