A retractable arc extinguishing component switching device

Abstract

The present invention discloses a retractable arc extinguishing assembly switching device, which belongs to the field of arc extinguishing switching devices, and includes a turntable and a turntable shaft arranged on the turntable. A plurality of arc extinguishing assembly storage slots for placing arc extinguishing assemblies are evenly distributed on the edge of the turntable, and the arc extinguishing assemblies are arranged in the arc extinguishing assembly storage slots. A base plate is provided at the rear end of the turntable, and an elastic assembly is provided between the arc extinguishing assembly and the base plate, and elastic contact is provided between the elastic assembly and the arc extinguishing assembly. An outer shell frame is provided on the outside of the turntable. The present invention improves the effectiveness and reliability of arc extinguishing assembly switching, avoids the problem of jamming when the arc extinguishing turntable rotates, and one end of the arc extinguishing assembly on the triggering position partially extends into the arc extinguishing tube, which has a strong sealing effect on the strong airflow generated during triggering, so that the strong airflow acts on the arc to the maximum extent, thereby improving the arc extinguishing ability; the back force of the jet flow is used to make the arc extinguishing assembly telescope into the arc extinguishing assembly storage slot.

Description

Technical Field

[0001] The present invention relates to the field of arc extinguishing switching devices, and in particular to a telescopic arc extinguishing component switching device. Background Art

[0002] Lightning protection for transmission lines has always been a key component of power sector lightning protection efforts, and lightning faults remain a significant factor impacting power grid safety. Lightning strikes on transmission lines can cause insulator flashovers, and the resulting power-frequency continuous current damages the insulator strings and fittings, leading to burnout of insulator strings and severed conductors.

[0003] Existing lightning protection devices for power transmission lines primarily utilize lightning protection gap devices (PGDs). However, the key lightning protection feature of these devices is the arc extinguishing process performed by a gas generator. When the gas assembly is in the trigger position, the end of the trigger electrode is captured by a positioning rod until the gas assembly is triggered. This triggering generates a strong airflow, bending the trigger electrode in the groove and causing the end of the trigger electrode to retract into the arc extinguishing disc. The arc extinguishing disc rotates under the action of the planar scroll elastic component until the next gas assembly enters the trigger position, where the corresponding trigger electrode is captured by the positioning rod.

[0004] The strong jet of air must act both horizontally on the grooved trigger electrode and vertically on the arc. Considering concerns that the strong airflow may not fully affect the arc, it is desirable to maximize the effect of the strong airflow on the arc. The arc extinguishing disc is also prone to jamming during rotation. To this end, a retractable arc extinguishing assembly switching device was proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a retractable arc extinguishing assembly switching device to solve the technical problem that the existing arc extinguishing turntable is prone to jamming during rotation. When jamming occurs, the arc cannot be extinguished in the next step, affecting the safety of the entire transmission line. The existing arc extinguishing turntable uses an electrode sheet arranged horizontally in the arc extinguishing assembly storage slot. When the arc extinguishing assembly is detonated, the electrode sheet is horizontally blown into an arc shape, thereby causing the part with the external buckle to retract and enter the next buckle position. However, the explosive force is often insufficient to bend the part, resulting in the inability to enter the next buckle position.

[0006] A telescopic arc extinguishing component switching device includes a turntable and a turntable shaft arranged on the turntable. Several arc extinguishing component storage slots for placing arc extinguishing components are evenly distributed on the edge of the turntable. The arc extinguishing components are arranged in the arc extinguishing component storage slots. A base plate is provided at the rear end of the turntable. An elastic component is provided between the arc extinguishing component and the base plate, and the elastic component and the arc extinguishing component are elastically contacted. An outer shell frame is provided on the outside of the turntable. The outer shell frame is slidably contacted with the front end of the turntable, and the arc extinguishing component is extruded. An arc extinguishing tube is provided on the outer shell frame. The arc extinguishing tube is connected to the interior of the outer shell frame and is arranged opposite to the arc extinguishing component.

[0007] Furthermore, the elastic component is a spring or a shrapnel, one end of which is fixed to the base of the arc extinguishing component and the other end is fixed to the bottom plate, and is arranged in the arc extinguishing component storage groove, and the bottom plate is fixedly arranged to fit the rear end of the turntable.

[0008] Furthermore, it also includes an induction coil and a wire. There are two trigger signal input terminals on the base of the arc extinguishing component, and the two trigger signal input terminals are arranged in the elastic component; one of the trigger signal input terminals is connected to the base plate through a wire, and the other trigger signal input terminal is connected to the metal shell outside the arc extinguishing component through a wire. A metal electrode is provided in each arc extinguishing component storage slot of the turntable, and the metal electrode is connected to one end of the induction coil through a wire, and the other end of the induction coil is connected to the base plate.

[0009] Furthermore, the arc extinguishing assembly storage groove includes a storage groove cartridge and a storage groove protrusion, the center lines of the storage groove cartridge and the storage groove protrusion are set on the same straight line, the radius of the storage groove cartridge is larger than the radius of the storage groove protrusion, the storage groove cartridge and the storage groove protrusion are connected to each other, the storage groove cartridge is connected to the rear end of the turntable, and the storage groove protrusion is connected to the front end of the turntable.

[0010] Furthermore, the opening of the arc extinguishing cylinder is set as a concave arc surface cartridge or a circular cartridge, the radius of the concave arc surface cartridge or the radius of the circular cartridge is larger than the front end radius of the arc extinguishing assembly, and the center line of the concave arc surface cartridge or the circular cartridge is set on the same straight line as the air guide tube in the arc extinguishing cylinder.

[0011] Furthermore, the switching process of the switching device is as follows: when the arc extinguishing component on the trigger position receives a lightning trigger signal, the arc extinguishing component on the trigger position is the arc extinguishing component that has been stuck in the arc extinguishing tube, and the arc extinguishing component ejects an airflow. At the same time, the arc extinguishing component is compressed under the force of the recoil of the airflow, and the arc extinguishing component on the trigger position is disengaged from the buckle of the arc extinguishing tube. The turntable rotates under the action of the power and the rotating shaft. When the arc extinguishing component on the trigger position rotates to the trigger position, the elastic component stretches, and one end of the arc extinguishing component partially extends into the arc extinguishing tube, and the position is achieved again. After the metal shell of the arc extinguishing component contacts the metal electrode set on the arc extinguishing component, the trigger circuit is connected, waiting for the next trigger signal.

[0012] Furthermore, the arc extinguishing assembly includes a trigger signal input terminal, a wrapping layer, a gas ball base, a gas ball and an air jet hole. The trigger signal input terminal is arranged on the gas ball base, the gas ball is arranged on one side of the gas ball base, the wrapping layer is wrapped around the gas ball base and the outside of the gas ball, and is arranged in a close fit. The air jet hole is provided at the joint between the wrapping layer and the gas ball, the wrapping layer is arranged as a hard layer, the gas ball is triggered to burn, the side wall of the wrapping layer radially constrains the gas ball, and the two ends constrain the gas ball axially, and the gas generated by the gas ball is ejected from the air jet hole.

[0013] Furthermore, the arc extinguishing assembly includes a trigger signal input terminal, a limit frame, a sleeve, a gas ball base, a gas ball and a jet hole. The trigger signal input terminal is arranged on the gas ball base, the gas ball base is connected to the gas ball, the sleeve is sleeved on the outside of the gas ball, the limit frame is clamped on the outside of the sleeve and the gas ball base, and the limit frame is provided with a jet hole. The gas ball is triggered to burn and produce gas, the sleeve produces radial constraint on the gas, and the limit frame produces axial constraint on the gas, the combustion speed in the gas ball is accelerated, and the gas is ejected from the jet hole, and the limit frame and sleeve are both set to be hard structures.

[0014] Furthermore, the arc extinguishing assembly includes a trigger signal input terminal, a limiting barrel, a sleeve, a gas ball base, a gas ball and a jet hole. The trigger signal input terminal is arranged on the gas ball base, the gas ball base is connected to the gas ball, the sleeve is sleeved on the outside of the gas ball, the limiting barrel is clamped on the outside of the sleeve and the gas ball base, and the limiting barrel is provided with a jet hole. The gas ball is triggered to burn, the sleeve radially constrains the gas ball, and the limiting barrel axially constrains the gas ball. The gas generated by the gas ball is ejected from the jet hole, and the limiting barrel and the sleeve are both configured as hard structures.

[0015] Furthermore, the arc extinguishing assembly includes a trigger signal input terminal, an upper frame, a sleeve, an air ball base, an air ball, a lower frame and an air jet hole, the trigger signal input terminal is arranged on the air ball base, the air ball base is connected to the air ball, the sleeve is sleeved on the outside of the air ball, the upper frame and the lower frame are detachably connected, and the upper frame and the lower frame are clamped on the outside of the sleeve and the air ball base, the air jet hole is arranged on the lower frame, the air ball is triggered to burn to produce gas, the sleeve produces radial constraint on the gas, the upper frame and the lower frame are combined to produce axial constraint on the gas, the combustion speed of the fuel in the air ball is accelerated, and the gas is ejected from the air jet hole, the upper frame, the lower frame and the sleeve are all set to be hard structures.

[0016] The present invention adopts the above technical solution, and the present invention has the following technical effects:

[0017] The present invention improves the effectiveness and reliability of switching the arc extinguishing assembly, avoids the problem of jamming when the arc extinguishing turntable rotates, one end of the arc extinguishing assembly on the triggering position partially extends into the arc extinguishing tube, has a strong sealing effect on the strong airflow generated during triggering, maximizes the effect of the strong airflow on the arc, and improves the arc extinguishing ability; the rear force of the jet flow is used to make the arc extinguishing assembly extend and retract into the arc extinguishing assembly storage slot, and the arc extinguishing assembly is switched using the arc extinguishing tube buckle. The device will not get stuck, and there is no need to worry about insufficient lateral explosion force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the device of the present invention.

[0019] Figure 2 Two other cross-sectional views of the device of the present invention.

[0020] Figure 3 These are two cross-sectional views of the electrode connection structure of the present invention.

[0021] Figure 4 It is a cross-sectional view of the first structure of the arc extinguishing assembly of the present invention.

[0022] Figure 5 These are four cross-sectional views of the second structure of the arc extinguishing assembly of the present invention.

[0023] Figure 6 These are two cross-sectional views of the third structure of the arc extinguishing assembly of the present invention.

[0024] Figure 7 These are four cross-sectional views of the fourth structure of the arc extinguishing assembly of the present invention.

[0025] Figure 8 This is a comparison chart of the arc extinguishing effect of the arc extinguishing assembly of the present invention and the arc extinguishing effect of a common gas generator.

[0026] In the figure: 1-housing frame; 2-turntable shaft; 3-bottom plate; 4-elastic component; 5-arc extinguishing component storage slot; 5.1-storage slot cartridge; 5.2-storage slot convex cylinder; 6-turntable; 7-arc extinguishing component; 8-arc extinguishing cylinder; 9-induction coil; 10-conductor; 11-concave arc surface cartridge; 12-round cartridge; 11A-trigger signal input terminal; 12A-wrapping layer; 13A-gas pellet base; 14A-gas pellet; 15A-jet hole; 16A-bottom wall; 11B-trigger signal input terminal; 12B-limiting frame; 13B-sleeve; 1 4B-air pill base; 15B-air pill; 16B-air jet hole; 17B-sealing ring; 18B-base support; 11C-trigger signal input terminal; 12C-limit barrel; 13C-sleeve; 14C-air pill base; 15C-air pill; 16C-air jet hole; 17C-bottom wall; 18C-sealing ring; 11D-trigger signal input terminal; 12D-upper frame; 13D-sleeve; 14D-air pill base; 15D-air pill; 16D-lower frame; 17D-air jet hole; 18D-sealing ring; 19D-frame connector. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and by way of preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help the reader gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be practiced even without these specific details.

[0028] According to the above principle and reference Figure 1 The embodiments of the present invention are further described as follows:

[0029] Example 1:

[0030] The present invention provides a retractable arc extinguishing assembly switching device, comprising a turntable 6 and a turntable shaft 2 arranged on the turntable 6. A plurality of arc extinguishing assembly storage slots 5 for placing arc extinguishing assemblies 7 are evenly distributed on the edge of the turntable 6, and the arc extinguishing assemblies 7 are arranged in the arc extinguishing assembly storage slots 5. A base plate 3 is provided at the rear end of the turntable 6, an elastic assembly 4 is provided between the arc extinguishing assembly 7 and the base plate 3, and the elastic assembly 4 is elastically contacted with the arc extinguishing assembly 7. An outer shell frame 1 is provided on the outside of the turntable 6, and the outer shell frame 1 is slidably arranged in contact with the front end of the turntable 6, and the arc extinguishing assembly 7 is squeezed. An arc extinguishing tube 8 is provided on the outer shell frame 1, and the arc extinguishing tube 8 is connected to the interior of the outer shell frame 1 and is arranged opposite to the arc extinguishing assembly 7.

[0031] Several grooves (arc extinguishing component storage slots 5) for placing arc extinguishing components 7 are evenly distributed around the edge of the circular arc extinguishing turntable 6. The inner diameters of the circular holes in the grooves vary from top to bottom, and the lower ends are slightly convex, which are used to clamp the arc extinguishing components 7 on the trigger position. A metal circular bottom plate 3 is encapsulated at the bottom of the arc extinguishing turntable 6. The area of ​​the bottom plate 3 is the same as that of the arc extinguishing turntable 6, so that one end of the arc extinguishing turntable groove is sealed by the bottom plate 3 and the other end is open. The arc extinguishing turntable is encapsulated in the insulation device housing and is connected to the device housing frame 1 through the turntable shaft 2, and can rotate under the action of the shaft.

[0032] The base of the arc extinguishing assembly 7 is connected to the metal base plate via a spring. One end of the arc extinguishing assembly 7 in the to-be-triggered position is in contact with the outer shell frame 1, and the other end (base) is connected to the metal base plate 3 via a spring. The spring is compressed under pressure. One end of the arc extinguishing assembly 7 in the trigger position partially extends into the arc extinguishing tube, which can play a role in locking the position; the other end (base) is connected to the metal base plate via a spring. Since the arc extinguishing assembly 7 in the trigger position is no longer constrained by the outer shell frame 1 of the device, the spring stretches, and the raised part in the groove limits the base of the outer shell frame 1.

[0033] Two trigger signal input terminals are located at the base of the housing frame 1 and are housed within springs. One terminal is connected to the metal baseplate via a wire 10, while the other is also connected to the metal housing of the gas assembly via a wire. A metal electrode is provided on the upper surface of the raised portion within each groove of the arc-extinguishing rotary disk. This metal electrode is connected to one end of an induction coil 9 via a wire, and the other end of the induction coil 9 is connected to the metal baseplate.

[0034] The switching device mainly uses the locking position of the arc extinguishing tube 8 and the elastic component 4 to achieve the locking of the arc extinguishing component 7, and then uses the after-effect force of the arc extinguishing component 7 to achieve the locking position of the arc extinguishing tube 8, and then realize the next switching. The switching device can achieve good switching without the problem of locking.

[0035] Example 2:

[0036] The elastic component 4 is a spring or a spring sheet, one end of which is fixed to the base of the arc extinguishing component 7, and the other end is fixed to the bottom plate 3, and is arranged in the arc extinguishing component storage groove 5. The bottom plate 3 is fixedly arranged to fit the rear end of the turntable 6. In addition to springs or elastic sheets, other components or devices with elastic functions can be used. The elastic component 4 is mainly used to elastically pop out the arc extinguishing component 7, clamping the arc extinguishing component 7 in the arc extinguishing tube 8. Then, when the elastic component 4 is compressed and the turntable 6 rotates, the arc extinguishing component 7 is disengaged, and the next arc extinguishing component 7 is clamped, thereby achieving switching.

[0037] Example 3:

[0038] It also includes an induction coil 9 and a wire 10. There are two trigger signal input terminals on the base of the arc extinguishing component 7, and the two trigger signal input terminals are arranged in the elastic component 4. One of the trigger signal input terminals is connected to the bottom plate 3 through a wire 10, and the other trigger signal input terminal is connected to the metal shell outside the arc extinguishing component 7 through a wire 10. A metal electrode is provided in each arc extinguishing component storage slot 5 of the turntable 6. The metal electrode is connected to one end of the induction coil 9 through a wire 10, and the other end of the induction coil 9 is connected to the bottom plate 3. The induction coil 9 is used to induce current, and then transmit the induced current to the arc extinguishing component 7 for detonation. Then the fuel in the arc extinguishing component 7 burns to achieve jet injection, which is very good at triggering arc extinguishing based on existing lightning.

[0039] Example 4:

[0040] The arc extinguishing assembly storage trough 5 includes a storage trough cartridge 5.1 and a storage trough protrusion 5.2. The centerlines of the storage trough cartridge 5.1 and the storage trough protrusion 5.2 are arranged on the same straight line. The radius of the storage trough cartridge 5.1 is larger than that of the storage trough protrusion 5.2. The storage trough cartridge 5.1 and the storage trough protrusion 5.2 are interconnected. The storage trough cartridge 5.1 is connected to the rear end of the turntable 6, and the storage trough protrusion 5.2 is connected to the front end of the turntable 6. The storage trough cartridge 5.1 is primarily used to store the base of the arc extinguishing assembly 7, while the storage trough protrusion 5.2 is used to store the gas pellets. The storage trough cartridge 5.1 is longer than the base of the arc extinguishing assembly 7, and can accommodate a spring, allowing the base of the arc extinguishing assembly 7 to have a position for reciprocating movement. The storage trough protrusion 5.2 is shorter than the gas pellets of the arc extinguishing assembly 7.

[0041] Example 5:

[0042] The opening of the arc-extinguishing tube 8 is configured as a concave arc-surface cartridge 11 or a circular cartridge 12. The radius of the concave arc-surface cartridge 11 or the circular cartridge 12 is larger than the front radius of the arc-extinguishing assembly 7. The centerline of the concave arc-surface cartridge 11 or the circular cartridge 12 is aligned with the airflow duct within the arc-extinguishing tube 8. The concave arc-surface cartridge 11 or the circular cartridge 12 is primarily used to hold the protruding portion of the arc-extinguishing assembly 7 in place. The size of the concave arc-surface cartridge 11 or the circular cartridge 12 is slightly larger than that of the arc-extinguishing assembly 7. The protruding portion of the arc-extinguishing assembly 7 is arranged to contact the rotational direction of the turntable 6 within the concave arc-surface cartridge 11 or the circular cartridge 12 because the turntable is subject to rotational force. The radius of the airflow duct of the arc-extinguishing tube 8 is smaller than the radius of the concave arc-surface cartridge 11 or the circular cartridge 12.

[0043] Example 6:

[0044] The switching process of the switching device is as follows: when the arc extinguishing component 7 on the trigger position receives a lightning trigger signal, the arc extinguishing component 7 on the trigger position is the arc extinguishing component 7 that has been stuck in the arc extinguishing tube 8, and the arc extinguishing component 7 ejects airflow. At the same time, the arc extinguishing component 7 is compressed under the force of the recoil of the airflow, and the elastic component 4 is compressed. The arc extinguishing component 7 on the trigger position is disengaged from the buckle of the arc extinguishing tube 8, and the turntable 6 rotates under the action of the power and the turntable shaft 2. When the arc extinguishing component 7 on the trigger position rotates to the trigger position, the elastic component 4 extends, and one end of the arc extinguishing component 7 is partially extended into the arc extinguishing tube 8, and the position is realized again. After the metal shell of the arc extinguishing component 7 contacts the metal electrode set on the arc extinguishing component 7, the trigger circuit is connected, waiting for the next trigger signal.

[0045] Example 7:

[0046] like Figure 4 As shown, the arc extinguishing assembly 7 includes a trigger signal input terminal 11A, a wrapping layer 12A, a gas pellet base 13A, a gas pellet 14A, and an air jet hole 15A. The trigger signal input terminal 11A is mounted on the gas pellet base 13A, and the gas pellet 14A is mounted on one side of the gas pellet base 13A. The wrapping layer 12A wraps around the outside of the gas pellet base 13A and the gas pellet 14A, forming a close bond. The air jet hole 15A is provided at the joint between the wrapping layer 12A and the gas pellet 14A. The wrapping layer 12A is configured as a hard layer. Increased pressure within the wrapping layer 12A increases the bending moment at the air jet hole 15A, leading to the ejection of high-pressure air. The sum of the base pressure of the gas pellet 14A and the incremental pressure of the wrapping layer 12A exceeds the critical pressure for the rupture of the gas pellet 14A.

[0047] The gas pellet base 13A and gas pellet 14A are nested within the wrapping layer 12A, which envelops them. Furthermore, the tight nesting of the gas pellet base 13A and gas pellet 14A within the wrapping layer 12A allows the thickness of the inner wall of the wrapping layer 2 to be manipulated to prevent displacement or expansion. The enormous pressure of the gas pellet 14A is contained by the wrapping layer 12A, and the gases generated by the combustion of all the gas-generating materials within the gas pellet 14A bear all the pressure within the wrapping layer 12A. A trigger signal input port is designed at the top of the wrapping layer 12A, and a trigger signal input terminal 11A is provided on the trigger signal input port for the gas pellet 14A to receive the lightning trigger signal. The wrapping layer 12A also includes an air jet hole 15A, from which gas is ejected in a controllable direction. By reducing the aperture of the air jet hole 15A and adjusting the desired position, directional control is achieved, compared to the original detonation method. The wrapping layer 12A is made of high-strength materials such as aluminum steel.

[0048] After receiving a trigger signal from trigger signal input terminal 11A, gas pellet 14A rapidly generates gas within it. Due to the superior strength of envelope 12A, the pressure of the gas generated by pellet 14A is far greater than that of the envelope 12A, preventing it from rupturing and causing a detonation. The gas pressure within pellet 14A is higher than that of the surface layer of pellet 14A. After reaching maximum pressure, the gas generated by pellet 14A can only be ejected through jet orifice 15A, thereby increasing the pressure of the ejected gas. The jet direction can be controlled based on the size and position of jet orifice 15A. Furthermore, during the combustion process of pellet 14A, the internal gas pressure increases, resulting in faster combustion and shorter arc extinguishing reaction time.

[0049] Gas injection hole 15A is located opposite trigger signal input terminal 11A, which is in contact with gas pellet 14A. By locating gas injection hole 15A and trigger signal input terminal 11A at opposite ends, the gas pressure within gas pellet 14A reaches the material binding layer of gas injection hole 5 only after the gunpowder in the structure has completely burned. This allows for more complete combustion of the gas-generating material within gas pellet 14A, resulting in higher gas pressure and the ability to extinguish arcs generated by higher voltage transmission, resulting in more effective arc extinguishing.

[0050] The gas pellet 14A includes a material binding layer, gunpowder and solid oxygen or liquid oxygen. The gunpowder and solid oxygen or liquid oxygen are mixed and sealed and placed in the material binding layer. The rupture pressure value of the material binding layer is much smaller than the pressure increment value in the wrapping layer, and the incremental pressure of the material binding layer is smaller than the critical pressure of the gunpowder rupture.

[0051] After the gunpowder is ignited, solid or liquid oxygen provides oxygen for combustion. As the temperature rises, the solid or liquid oxygen vaporizes, providing additional gas pressure, creating a secondary pressurization effect that increases the gas pressure even faster. When the gunpowder is nearly completely burned, the gas pressure generated exceeds the critical pressure for the material's binding layer to rupture, causing the binding layer at the jet hole to rupture, and gas is ejected from the jet hole to extinguish the arc.

[0052] Trigger signal input terminal 11A is configured by installing multiple heating resistors in contact with the gunpowder inside the gas pellet. These heating resistors are connected in parallel to the trigger signal input terminal. This parallel arrangement of heating resistors achieves a multi-point ignition effect, shortening the reaction time and, therefore, the arc extinguishing time, making the arc extinguishing faster.

[0053] When a current signal is input to trigger signal input terminal 11A, the resistor wire heats up, causing the gunpowder in the pellet to combust and generate high-pressure gas. Envelope 12A constrains the high-pressure gas axially and radially, increasing the pressure within the envelope and the bending moment at the jet orifice. The pressure of the high-pressure gas exceeds the bending moment of the material constraining layer at the jet orifice, causing the high-pressure gas to be ejected from the jet orifice. The position of jet orifice 15A controls the direction of the ejection. When pellet 14A receives an electrical signal from trigger signal input terminal 11A, it triggers the generation of a large amount of arc-extinguishing gas. High-strength envelope 12A constrains the airflow radially and axially, rapidly increasing the incremental pressure within envelope 12A. Because the high-strength envelope encases the gas-generating material, its combustion rate accelerates and combustion integrity improves. This increases the pressure within the envelope, increasing the bending moment at the jet orifice and allowing the high-pressure gas flow to be ejected. Because the strength at the gas outlet is much lower than that of the wrapping layer 12A, and the aperture of the gas jet hole 15A is reduced, a large bending moment is generated. When the sum of the base pressure of the gas pellet 14A and the incremental pressure of the wrapping layer exceeds the critical pressure for the gas-generating material to rupture, air is ejected from the unwrapped gas outlet. The outlet jet direction is controllable, and the jet flow is concentrated and intense, greatly improving the arc extinguishing effect. By increasing the sealing strength, the material within the gas pellet 14A is fully burned to produce a higher critical release pressure. Simultaneously with arc formation, a high-speed arc-extinguishing airflow is generated, acting on the arc channel and blocking the subsequent arc formation process of the power frequency arc. This can extinguish the power frequency arc in a very short time, and the arc extinguishing time is far less than the circuit breaker operation time. The gas production of the arc extinguishing unit directly affects the arc extinguishing effect.

[0054] The wrapping layer 12A is designed as a cylindrical structure, with its inner wall tightly fitting the gas pellet base 13A and gas pellet 14A. The bottom of the cylinder is open, with a bottom wall 16A positioned on the side of the bottom. After inserting the gas pellet base 13A and gas pellet 14A, the bottom wall 16A is mechanically squeezed inward, forming a 90-degree angle with the side wall. An air jet hole 15A is located at the top of the cylinder. The wrapping layer 12A is provided with an input port for the trigger signal input terminal 11A. During installation, the gas pellet base 13A and gas pellet 14A are inserted into the inner cylinder of the wrapping layer 12A, and then the bottom wall 16A is squeezed inward by an extruder. The bottom wall 16A primarily secures the gas pellet base 13A. When high-pressure gas is generated, a tension is generated, which is maintained by the bottom wall 16A. The thickness of the bottom wall 16A is thicker than that of the other end of the cylinder. The cylindrical structure is convenient for installation and simple to manufacture, significantly reducing processing costs and improving economic efficiency.

[0055] The wrapping layer 12A is provided as a box structure, and a snap-fit ​​cover is provided on the box structure, and the snap-fit ​​cover is snap-fitted with the box structure by means of a provided buckle. The air pill base 13A and the air pill 14A are placed in the box structure, wherein the internal structure provided in the box structure is the same as the structure of the air pill base 13A and the air pill 14A, and can be cylindrical, square, or a convex head structure, etc., and can be provided by mold opening when the box structure is processed. After the air pill base 13A and the air pill 14A are inserted, the snap-fit ​​cover is covered and then fastened with a buckle, which is convenient for installation and can be completed directly by hand, with the advantages of fast processing speed and low cost.

[0056] The size of the jet hole 15A is 5-8mm, and the gas generated by the gas pellet 14A is ejected from the jet hole. The airflow is ejected from the unenclosed jet hole 15A, and the jet direction of the jet hole 15A is controllable. The jet flow is concentrated and strong, which greatly improves the arc extinguishing effect. The conventional jet hole is generally more than ten millimeters, which makes the spray range too large, shortens the spray time, and has a poor arc extinguishing effect. According to the bending moment calculation formula: , θ is the torque, EI is the rotational stiffness, and L is the effective calculated length of the rod. When θ (torque) and EI (rotational stiffness) are the same, shortening L increases the bending moment, which means the pressure of the ejected gas increases. Furthermore, due to the smaller size of the jet hole 15A, it takes longer to eject the same amount of gas, which means the arc extinguishing time is longer. This results in increased arc extinguishing gas pressure and longer arc extinguishing time, achieving better arc extinguishing results.

[0057] The wrapping layer 12A and the material binding layer are made of the same metal material. The thickness of the wrapping layer 12A is proportional to the amount of gunpowder. Since the lightning protection device is installed on power lines for long periods of time, it is exposed to the sun and rain. If different metals are used, a potential difference will form between the material binding layer and the radial sleeve or wrapping layer. This potential difference will easily lead to corrosion, significantly shortening the service life of the lightning protection device. Using the same metal material can effectively prevent this from occurring.

[0058] Example 8:

[0059] like Figure 5As shown, the arc extinguishing assembly 7 includes a trigger signal input terminal 11B, a limit frame 12B, a sleeve 13B, a gas pellet base 14B, a gas pellet 15B, and an air jet hole 16B. The trigger signal input terminal 11B is disposed on the gas pellet base 14B, which is connected to the gas pellet 15B. The sleeve 13B is sleeved on the outside of the gas pellet 15B. The limit frame 12B is inserted outside the sleeve 13B and the gas pellet base 14B. The limit frame 12B is provided with an air jet hole 16B. The pressure inside the sleeve and limit frame increases, the bending moment at the air jet hole increases, and a high-pressure airflow is ejected. The sum of the base pressure of the gas pellet 15B and the incremental pressure of the limit frame 12B or the incremental pressure of the sleeve 13B is greater than the critical pressure for the rupture of the gas-generating material inside the gas pellet 15B. The limit frame 12B and the sleeve 13B are both configured as rigid structures.

[0060] The base pressure of the pellet 15B is the reaction force of the extrusion of the encapsulated gunpowder when the pellet 15B is not burning. This refers to the outward tension exerted by the sleeve 13B when the pellet 15B is tightly wrapped around it. The incremental pressure of the sleeve 13B is the pressure at which the sleeve 13B ruptures, adding pressure to the sleeve 13B. The incremental pressure of the limit frame 12B is the outward pressure applied to the limit frame 12B, which is the pressure at which the limit frame 12B ruptures. The critical pressure for the rupture of the pellet 15B is the pressure at which the maximum gas pressure is generated when the fuel within the pellet 15B is completely burned. That is, the high-strength limiting frame 12B and the sleeve 13B wrap the gas pellet 15B, which does not cause detonation. Instead, high-pressure gas is ejected from the gas injection hole 16B after complete combustion.

[0061] The gas pellet 15B is nested within the sleeve 13B, which encloses the sides of the gas pellet 15B. The top of the limit frame 12B is in close contact with the gas pellet base 14B, and the bottom is in close contact with the bottom of the gas pellet 15B or with the bottom of the sleeve 13B. The sleeve 13B tightly encloses the gas pellet 15B radially, and the thickness of the inner wall of the sleeve 13B is treated to prevent displacement or expansion. The enormous pressure of the gas pellet 15B is contained by the sleeve 13B, and the gas generated by the combustion of all the gas-producing materials within the gas pellet 15B is subjected to all the pressure within the sleeve 13B. Vertically, the limit frame 12B limits the high-pressure gas generated within the gas pellet 15B at its upper and lower ends, preventing expansion or bursting. A trigger signal input port is designed at the top of the limit frame 12B, which is equipped with a trigger signal input terminal 11B for the gas pellet 15B to receive the lightning trigger signal. Limiting frame 12B is provided with jet holes 16B. Gas is ejected from these unenclosed jet holes 16B in a controllable direction. By reducing the aperture of jet holes 16B and adjusting their position as needed, a controllable direction is achieved, compared to the conventional detonation method. Limiting frame 12B and sleeve 13B are made of high-strength materials such as aluminum steel.

[0062] After receiving a trigger signal from trigger signal input terminal 11B, gas pellet 15B rapidly generates gas within it. Due to the superior strength of sleeve 13B and limit frame 12B, the pressure of the gas generated by pellet 15B far exceeds the pressure, preventing them from rupturing and causing a detonation. Once the pressure of the gas generated within pellet 15B exceeds the maximum pressure of the pellet's surface, the gas generated by pellet 15B can only be ejected through jet orifice 16B, thereby increasing the pressure of the ejected gas. Furthermore, the jet direction can be controlled based on the size and position of jet orifice 16B. Furthermore, during the combustion process of pellet 15B, the internal gas pressure increases, resulting in faster combustion and shorter arc extinguishing reaction time.

[0063] The sleeve 13B is configured as a cylindrical structure, which is composed of several detachable circular hoops, which are detachably connected to each other. The circular hoops are connected by threads or snaps, so that the gas pellets 15B of corresponding lengths can be set according to the voltage of the transmission line that needs arc extinguishing. When the width or diameter of the gas pellets 15B is constant, the higher the voltage of the transmission line that needs arc extinguishing, the longer the gas pellets 15B are, the higher the pressure of the arc extinguishing gas, the longer the arc extinguishing time, and the better the arc extinguishing effect, which can extinguish arcs generated by higher voltage transmission lines. At the same time, it can also facilitate the installation of the sleeve 13B. The number of circular hoops connected is determined according to the length of the gas pellets 15B. Generally, the length of the gas pellets 15B is an integer multiple of the length of the circular hoop.

[0064] Sleeve 13B is configured as a cylindrical structure, with a cylindrical jet opening at the bottom of the cylindrical structure. The center of the cylindrical jet opening is aligned with the center of jet hole 16B. The bottom of the cylindrical structure is configured as a barrel bottom structure, and the cylindrical jet opening is provided in the barrel bottom structure, and the cylindrical jet opening and the jet hole 16B coincide with each other.

[0065] The limit frame 12B, sleeve 13B, and material binding layer are made of the same metal material. The thickness of the limit frame 12B and sleeve 13B is proportional to the amount of gunpowder. Because the lightning protection device is installed on the power transmission line for a long time, it is exposed to the sun and rain. If different metals are used, a potential difference will form between the material binding layer and the radial sleeve or wrapping layer. This potential difference will easily cause corrosion, which will significantly shorten the service life of the lightning protection device. Using the same metal material can effectively prevent this from occurring.

[0066] Example 9:

[0067] like Figure 6 As shown, the arc extinguishing assembly 7 includes a trigger signal input terminal 11C, a stopper barrel 12C, a sleeve 13C, a gas pellet base 14C, a gas pellet 15C, and an air jet hole 16C. The trigger signal input terminal 11C is disposed on the gas pellet base 14C, which is connected to the gas pellet 15C. The sleeve 13C is sleeved on the outside of the gas pellet 15C. The stopper barrel 12C is clamped on the outside of the sleeve 13C and the gas pellet base 14C. The stopper barrel 12C is provided with an air jet hole 16C. When the pressure inside the sleeve and stopper barrel increases, the bending moment at the air jet hole increases, and a high-pressure airflow is ejected. The sum of the base pressure of the gas pellet 15C and the incremental pressure of the stopper barrel 12C and / or the incremental pressure of the sleeve 13C is greater than the critical pressure for rupture of the gas-generating material inside the gas pellet 15C. The stopper barrel 12C and the sleeve 13C are both configured as rigid structures.

[0068] The gas pellet 15C is nested within the sleeve 13C, which wraps around the sides of the gas pellet 15C. The top of the limit barrel 12C is in close contact with the gas pellet base 14C, and the bottom is in close contact with the bottom of the gas pellet 15C or with the bottom of the sleeve 13C. The sleeve 13C tightly nests and wraps the gas pellet 15C radially, and the thickness of the inner wall of the sleeve 13C is treated to prevent displacement or expansion. The enormous air pressure of the gas pellet 15C is restrained by the sleeve 13C, and the gas generated by the combustion of all gas-producing materials within the gas pellet 15C is subjected to all pressure within the sleeve 13C. The limit barrel 12C vertically limits the high-pressure gas generated within the gas pellet 15C at the upper and lower ends, preventing expansion or bursting. A trigger signal input port is designed at the top of the limit barrel 12C, which is provided with a trigger signal input terminal 11C for the gas pellet 15C to receive a lightning trigger signal. The gas ejection hole 16C, which is not enclosed, is designed for the stopper barrel 12C. The gas ejects from this unenclosed hole 16C in a controllable direction. By reducing the diameter of the hole 16C and positioning it as needed, this achieves directional control compared to the conventional detonation method. The stopper barrel 12C and sleeve 13C are made of high-strength materials such as aluminum steel.

[0069] After receiving a trigger signal from trigger signal input terminal 11C, gas pellet 15C rapidly generates gas within it. Due to the superior strength of sleeve 13C and stopper barrel 12C, the pressure of the gas generated by pellet 15C far exceeds the pressure, preventing sleeve 13C and stopper barrel 12C from rupturing and causing a detonation. Once the pressure of the gas generated within pellet 15C exceeds the maximum pressure of the pellet 5's surface, the gas generated by pellet 15C can only be ejected from jet orifice 16C, thereby increasing the pressure of the ejected gas. Furthermore, the jet direction can be controlled based on the size and position of jet orifice C16. Furthermore, during the combustion process of pellet 15C, the internal gas pressure increases, resulting in a faster combustion rate and a shorter arc extinguishing reaction time.

[0070] Example 10:

[0071] like Figure 7As shown, the arc extinguishing component 7 includes a trigger signal input terminal 11D, an upper frame 12D, a sleeve 13D, an air pill base 14D, an air pill 15D, a lower frame 16D and an air jet hole 17D. The trigger signal input terminal 11D is arranged on the air pill base 14D, the air pill base 14D is connected to the air pill 15D, the sleeve 13D is sleeved on the outside of the air pill 15D, the upper frame 12D and the lower frame 16D are detachably connected, and the upper frame 12D and the lower frame 16D are clamped on the outside of the sleeve 13D and the air pill base 14D, the air jet hole 17D is arranged on the lower frame 16D, the pressure in the sleeve and the frame increases, the bending moment at the air jet hole increases, and high-pressure airflow is ejected. The sum of the basic pressure of the gas pellet 15D and the incremental pressure of the upper frame 12D and the lower frame 16D and / or the incremental pressure of the sleeve 13D is greater than the critical pressure of the gas-generating material in the gas pellet 15D to rupture, and the upper frame 12D, the lower frame 16D and the sleeve 13D are all configured as hard structures.

[0072] The gas pellet 15D is nested within the sleeve 13D, which wraps around the sides of the gas pellet 15D. The inner side of the top of the upper frame 12D is in close contact with the gas pellet base 14D, and the inner side of the lower frame 16D is in close contact with the bottom of the gas pellet 15D or with the bottom of the sleeve 13D. The sleeve 13D tightly nests and wraps the gas pellet 15D radially, and the thickness of the inner wall of the sleeve 13D is processed to prevent it from shifting or expanding. The huge air pressure of the gas pellet 15D is restrained by the sleeve 13D, and the gas generated by the combustion of all gas-producing materials in the gas pellet 15D bears all the pressure in the sleeve 13D. In the vertical direction, the upper frame 12D and the lower frame 16D limit the upper and lower ends of the high-pressure gas generated in the gas pellet 15D to prevent expansion or bursting. The top of the upper frame 12D is designed with a trigger signal input port, equipped with a trigger signal input terminal 11D, for the gas pellet 15D to receive the lightning trigger signal. The lower frame 16D is equipped with an air jet hole 17D, from which gas is ejected in a controllable direction. By reducing the aperture of the air jet hole 17D and adjusting its position according to the required requirements, directional control is achieved, compared to the traditional detonation method. The limit barrel 12D and sleeve 13D are made of high-strength materials such as aluminum steel.

[0073] After receiving a trigger signal from trigger signal input terminal 11D, gas pellet 15D rapidly generates gas within it. Due to the superior strength of sleeve 13D, upper frame 12D, and lower frame 16D, the pressure of the gas generated by pellet 15D is far greater than the pressure within it, preventing these three components from rupturing and causing a detonation. Once the pressure of the gas within pellet 15D exceeds the maximum pressure of the pellet's surface, the gas can only be ejected from jet orifice 17D, increasing the pressure of the ejected gas. Furthermore, the jet direction can be controlled based on the size and position of jet orifice 17D. Furthermore, during the combustion process of pellet 15D, the internal gas pressure increases, accelerating combustion and shortening arc extinguishing time.

[0074] like Figure 8 As shown, the effect of the arc extinguishing assembly of the present invention is compared with that of the existing gas-generating device. Curve S1 is a time-dependent graph of the arc extinguishing effect of an ordinary gas generator and the gas pressure, and curve S2 is a time-dependent graph of the arc extinguishing effect of the device of the present invention and the gas pressure. By comparison, it can be seen that the reaction time required for an ordinary gas generator to start arc extinguishing is t2, while the reaction time required for the device of the present application is t1, and t2 is greater than t1. The reason for this time difference is that the sleeve and the limiting barrel provided in the device of the present application radially constrain the airflow while the limiting barrel axially constrains the airflow. The pressure in the encapsulation layer increases, the bending moment at the jet hole increases, and high-pressure airflow is ejected. The sum of the base pressure of the gas pellet and the incremental pressure of the sleeve is greater than the critical pressure for the gas pellet to rupture. Simultaneously, the sum of the base pressure of the gas pellet and the incremental pressures of the upper and lower frames is greater than the critical pressure for the gas pellet to rupture. This allows the gas pellet to generate gas at the moment of ignition without deformation of the upper and lower frames 12D, resulting in a rapid increase in gas pressure. Conventional gas generators, however, deform to some extent when generating gas, increasing their volume, resulting in a lower increase in gas pressure than the gas pressure of the present application. Based on the relationship between combustion rate and pressure: the greater the pressure, the greater the combustion rate. This results in a faster combustion rate within the gas pellet 14A of the present device than within a conventional gas generator. Consequently, the jetting time of the present device is shorter than that of a conventional gas generator, and the arc extinguishing reaction time is faster.

[0075] Comparing the arc extinguishing pressure and time, the maximum pressure at the moment of detonation in a conventional gas generator, as shown in curve S1, is P1. The time period during which this pressure is reached is very short, lasting only until the moment of detonation, resulting in poor arc extinguishing effectiveness. In contrast, in the device of the present application, the time it takes to reach P1 during arc extinguishing is the period t1-t3, also known as the high-pressure arc extinguishing time. This time period t1-t3 is greater than the entire arc extinguishing time of a conventional gas generator, resulting in excellent arc extinguishing effectiveness and capable of extinguishing arcs generated on even higher voltage transmission lines. This is due to the fact that the gas in this device can only be ejected from the gas jet holes, while conventional gas generators directly eject gas from multiple directions during detonation, resulting in a very short high-pressure arc extinguishing time. The high-pressure gas in this device requires a period of time, t1-t3, to be ejected from the gas jet holes. Therefore, the arc extinguishing gas pressure is high and the gas ejection time is long, resulting in better arc extinguishing effectiveness and suitable for arcs in special applications and at higher voltage levels. The value of P2 is approximately ten times that of P1, resulting in a higher arc extinguishing gas jet pressure.

[0076] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A telescopic arc extinguishing component switching device, comprising a turntable (6) and a turntable shaft (2) arranged on the turntable (6), wherein a plurality of arc extinguishing component storage slots (5) for placing arc extinguishing components (7) are evenly distributed on the edge of the turntable (6), and the arc extinguishing components (7) are arranged in the arc extinguishing component storage slots (5), characterized in that: The rear end of the turntable (6) is provided with a base plate (3), an elastic component (4) is provided between the arc extinguishing component (7) and the base plate (3), and the elastic component (4) and the arc extinguishing component (7) are elastically contacted with each other; an outer shell frame (1) is sleeved on the outside of the turntable (6), the outer shell frame (1) is slidably contacted with the front end of the turntable (6), and the arc extinguishing component (7) is extruded; an arc extinguishing tube (8) is provided on the outer shell frame (1), the arc extinguishing tube (8) is communicated with the interior of the outer shell frame (1), and is arranged opposite to the arc extinguishing component (7); The switching process of the switching device is as follows: when the arc extinguishing component (7) on the trigger position receives a lightning trigger signal, the arc extinguishing component (7) on the trigger position is the arc extinguishing component (7) that has been stuck in the arc extinguishing tube (8), and the arc extinguishing component (7) ejects airflow. At the same time, the arc extinguishing component (7) is compressed under the force of the backlash of the airflow, and the arc extinguishing component (7) on the trigger position is separated from the buckle of the arc extinguishing tube (8). The turntable (6) rotates under the action of the power and the turntable shaft (2). When the arc extinguishing component (7) on the trigger position rotates to the trigger position, the elastic component (4) extends, and one end of the arc extinguishing component (7) is partially inserted into the arc extinguishing tube (8), and the position is locked again. After the metal shell of the arc extinguishing component (7) contacts the metal electrode provided on the arc extinguishing component (7), the trigger circuit is connected, and the next trigger signal is waited for. The elastic component (4) is a spring or a spring sheet, one end of which is fixed to the base of the arc extinguishing component (7) and the other end is fixed to the bottom plate (3), and is arranged in the arc extinguishing component storage groove (5), and the bottom plate (3) is fixedly arranged with the rear end of the rotating disk (6).

2. A retractable arc extinguishing component switching device according to claim 1, characterized in that: The invention also includes an induction coil (9) and a wire (10). Two trigger signal input terminals are provided on the base of the arc extinguishing component (7). The two trigger signal input terminals are arranged in the elastic component (4); one of the trigger signal input terminals is connected to the base plate (3) via a wire (10), and the other trigger signal input terminal is connected to the metal shell outside the arc extinguishing component (7) via a wire (10). A metal electrode is provided in each arc extinguishing component storage slot (5) of the turntable (6). The metal electrode is connected to one end of the induction coil (9) via a wire (10), and the other end of the induction coil (9) is connected to the base plate (3).

3. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The arc extinguishing component storage slot (5) comprises a storage slot cartridge (5.1) and a storage slot convex cylinder (5.2); the midlines of the storage slot cartridge (5.1) and the storage slot convex cylinder (5.2) are arranged on the same straight line; the radius of the storage slot cartridge (5.1) is larger than the radius of the storage slot convex cylinder (5.2); the storage slot cartridge (5.1) and the storage slot convex cylinder (5.2) are connected to each other; the storage slot cartridge (5.1) is connected to the rear end of the turntable (6); and the storage slot convex cylinder (5.2) is connected to the front end of the turntable (6).

4. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The opening of the arc extinguishing tube (8) is provided as a concave arc surface cartridge (11) or a circular cartridge (12); the radius of the concave arc surface cartridge (11) or the radius of the circular cartridge (12) is larger than the front end radius of the arc extinguishing assembly (7); and the center line of the concave arc surface cartridge (11) or the circular cartridge (12) is provided on the same straight line as the air flow guide tube in the arc extinguishing tube (8).

5. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The arc extinguishing component (7) comprises a trigger signal input terminal (11A), a wrapping layer (12A), a gas pellet base (13A), a gas pellet (14A) and an air jet hole (15A); the trigger signal input terminal (11A) is arranged on the gas pellet base (13A); the gas pellet (14A) is arranged on one side of the gas pellet base (13A); the wrapping layer (12A) is wrapped around the gas pellet base (13A) and the outer side of the gas pellet (14A) and is arranged in close contact; the air jet hole (15A) is arranged at the contact point between the wrapping layer (12A) and the gas pellet (14A); the wrapping layer (12A) is arranged as a hard layer; the gas pellet (14A) is triggered to burn; the side wall of the wrapping layer (12A) radially constrains the gas pellet (14A); and the two ends constrain the gas pellet (14A) axially; the gas generated by the gas pellet (14A) is ejected from the air jet hole (15A).

6. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The arc extinguishing assembly (7) comprises a trigger signal input terminal (11B), a limit frame (12B), a sleeve (13B), an air pill base (14B), an air pill (15B) and an air jet hole (16B); the trigger signal input terminal (11B) is arranged on the air pill base (14B); the air pill base (14B) is connected to the air pill (15B); the sleeve (13B) is sleeved on the outside of the air pill (15B); the limit frame (12B) is sleeved On the outside of the sleeve (13B) and the gas pellet base (14B), a gas injection hole (16B) is provided on the limiting frame (12B). The gas pellet (15B) is triggered to burn and generate gas. The sleeve (13B) generates radial constraints on the gas, and the limiting frame (12B) generates axial constraints on the gas. The combustion speed in the gas pellet (15B) is accelerated, and the gas is ejected from the gas injection hole (16B). The limiting frame (12B) and the sleeve (13B) are both configured as hard structures.

7. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The arc extinguishing assembly (7) comprises a trigger signal input terminal (11C), a limiting barrel (12C), a sleeve (13C), an air pill base (14C), an air pill (15C) and an air jet hole (16C); the trigger signal input terminal (11C) is arranged on the air pill base (14C); the air pill base (14C) is connected to the air pill (15C); the sleeve (13C) is sleeved on the outside of the air pill (15C); the limiting barrel (12C) is sleeved on the outside of the air pill (15C); An air jet hole (16C) is provided on the outer side of the sleeve (13C) and the air pellet base (14C). When the air pellet (15C) is triggered to burn, the sleeve (13C) radially constrains the air pellet (15C), and the limiting barrel (12C) axially constrains the air pellet (15C). The gas generated by the air pellet (15C) is ejected from the air jet hole (16C). The limiting barrel (12C) and the sleeve (13C) are both configured as hard structures.

8. The retractable arc extinguishing component switching device according to claim 1, characterized in that: The arc extinguishing assembly (7) comprises a trigger signal input terminal (11D), an upper frame (12D), a sleeve (13D), an air pill base (14D), an air pill (15D), a lower frame (16D) and an air jet hole (17D); the trigger signal input terminal (11D) is arranged on the air pill base (14D); the air pill base (14D) is connected to the air pill (15D); the sleeve (13D) is sleeved on the outside of the air pill (15D); the upper frame (12D) and the lower frame (16D) are detachably connected; and the upper frame (12D) and the lower frame (16D) are detachably connected. The body (16D) is inserted into the outer sides of the sleeve (13D) and the gas pellet base (14D); the gas injection hole (17D) is arranged on the lower frame (16D); the gas pellet (15D) is triggered to burn and generate gas; the sleeve (13D) generates radial constraints on the gas; the upper frame (12D) and the lower frame (16D) are combined to generate axial constraints on the gas; the combustion speed of the fuel in the gas pellet (15D) is accelerated, and the gas is ejected from the gas injection hole (17D); the upper frame (12D), the lower frame (16D) and the sleeve (13D) are all configured as hard structures.

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