MV-grade gas switch with adjustable electrode distance and electrode distance adjusting method thereof

Abstract

The invention relates to a high-pressure gas switch of a pulse power device and an electrode distance adjusting method, in particular to an MV-grade gas switch with an adjustable electrode distance and an electrode distance adjusting method thereof, and solves the problems that the electrode distance of an existing gas switch is difficult to adjust; and an external adjusting mechanism cannot be applied to a closed space structure and is easily influenced by a strong electromagnetic environment. The invention relates to an MV-grade gas switch with an adjustable electrode distance, which comprises a first electrode disc, a first insulating cylinder, a second insulating cylinder, a second electrode disc, a first electrode adjusting mechanism, a second electrode adjusting mechanism, two electrode ball heads, a guide rod and two pneumatic electromagnetic valve groups, wherein the distance of the electrode ball head can be adjusted and controlled in a closed space; the method for adjusting the distance between the electrodes can be applied to a complex electromagnetic environment and is not affected by electromagnetic damage.

Description

Technical Field

[0001] The invention relates to a high-voltage gas switch of a pulse power device and an electrode spacing adjustment method, and in particular to an MV-level gas switch with adjustable electrode spacing and an electrode spacing adjustment method thereof. Background Art

[0002] Gas switches are key components for pulse power devices to achieve power transmission and pulse compression, and have a significant impact on the output characteristics of the device. To ensure stable output of pulse power devices, gas switches need to achieve low-jitter breakdown over the full voltage range.

[0003] Generally speaking, the breakdown of gas switches is relatively stable under high pressure and high field strength conditions. High-pressure gas switches mainly adjust the breakdown voltage level and the breakdown characteristics of gas switches by adjusting the gas pressure. However, when the electrode spacing of the gas switch is fixed, it is impossible to achieve high pressure and high field strength conditions within the full voltage range, which in turn affects the breakdown stability of the gas switch.

[0004] The existing gas switch electrode adjustment mechanism is usually used in an open structure space. The electrode adjustment mechanism is placed outside the overall structure of the gas switch and is not restricted by the layout of the pulse power device. The external adjustment mechanism cannot be used in a closed space structure, and the adjustment mechanism is generally controlled by a servo motor. Under MV voltage conditions, the drive system and control unit of the pulse power device are easily affected by the strong electromagnetic environment and reduce reliability. Therefore, for MV-level gas switches, in order to improve the breakdown stability of the full voltage range, a gas switch electrode adjustment mechanism with high reliability is required. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that the electrode spacing of the existing gas switch is difficult to adjust, and the external adjustment mechanism cannot be applied to a closed space structure and is easily affected by a strong electromagnetic environment, and to provide an MV-level gas switch with adjustable electrode spacing and an electrode spacing adjustment method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An MV-class gas switch with adjustable electrode spacing is special in that it comprises a first electrode disk, a first insulating cylinder, a second insulating cylinder, a second electrode disk, a first electrode adjustment mechanism, a second electrode adjustment mechanism, two electrode ball heads, a guide rod, and two pneumatic solenoid valve groups, which are coaxially arranged in sequence;

[0008] A trigger electrode is coaxially arranged between one end of the first insulating cylinder and one end of the second insulating cylinder, the other end of the first insulating cylinder is connected to the first electrode disk, the other end of the second insulating cylinder is connected to the second electrode disk, and the first insulating cylinder, the first electrode disk and the trigger electrode form a first insulating cavity, and the second insulating cylinder, the second electrode disk and the trigger electrode form a second insulating cavity;

[0009] The first electrode adjustment mechanism is coaxially arranged in the first insulating cavity, and one end of the first electrode adjustment mechanism is connected to the first electrode disk; the second electrode adjustment mechanism is coaxially arranged in the second insulating cylinder, and one end of the second electrode adjustment mechanism is connected to the second electrode disk; the other end of the first electrode adjustment mechanism and the other end of the second electrode adjustment mechanism are coaxially slidably connected to two electrode ball heads through guide rods respectively; a discharge gap is formed between the two electrode ball heads and the trigger electrode respectively;

[0010] Air channels are respectively arranged on the first electrode disk, the second electrode disk and the trigger electrode; the air channel on the trigger electrode is used to fill the first insulating cavity and the second insulating cavity with insulating gas; one end of the two pneumatic solenoid valve groups respectively passes through the air channels of the first electrode disk and the second electrode disk and is connected to an end of the first electrode adjustment mechanism away from the electrode ball head and an end of the second electrode adjustment mechanism away from the electrode ball head; the other ends of the two pneumatic solenoid valve groups are used to be connected to an external gas supply device to provide driving force for the first electrode adjustment mechanism and the second electrode adjustment mechanism, and both the first electrode adjustment mechanism and the second electrode adjustment mechanism are used to drive the guide rod to push and pull the electrode ball head away from or close to the trigger electrode.

[0011] Further, the first electrode adjustment mechanism includes a support barrel coaxially arranged in the first insulating cylinder and open at one end, a ratchet, a gear, a rack, a stop pawl, a first spring, a second spring, a third spring, a first transmission unit and a second transmission unit arranged at the bottom of the support barrel;

[0012] The pneumatic solenoid valve group includes a first pneumatic solenoid valve and a second pneumatic solenoid valve;

[0013] The open end of the support barrel is connected to the inner side of the first electrode disk;

[0014] The gear is coaxially arranged on the ratchet wheel, and its diameter is smaller than that of the ratchet wheel;

[0015] One end of the stop pawl is connected to the bottom of the support barrel through the first spring, and the other end is engaged with the ratchet wheel to prevent the ratchet wheel from rotating.

[0016] One end of the first transmission unit is connected to the bottom of the support barrel through the second spring, and the other end passes through the air passage and is connected to one end of the first pneumatic solenoid valve;

[0017] One end of the second transmission unit is connected to the bottom of the support barrel through the third spring, and the other end passes through the air passage and is connected to one end of the second pneumatic solenoid valve; the first transmission unit and the second transmission unit are both used to drive the ratchet to rotate, and the ratchet is used to drive the gear to rotate;

[0018] One end of the rack passes through the bottom of the support barrel and is connected to the bottom of the electrode ball head through a guide rod, and the other end is meshed with a gear. The gear is used to drive the rack to move linearly, and the rack is used to drive the guide rod to push the electrode ball head away from or close to the trigger electrode.

[0019] The second electrode adjustment mechanism has the same structure as the first electrode adjustment mechanism.

[0020] Further, the first transmission unit includes a pawl meshing with the ratchet wheel, a first pawl guide rod, a first leaf spring and a first cylinder; one end of the first pawl guide rod is connected to one end of the pawl, and the other end of the first pawl guide rod is connected to the piston rod of the first cylinder; the inflatable end of the first cylinder is connected to one end of the first pneumatic solenoid valve through the air passage; one end of the first leaf spring is connected to the other end of the pawl, and the other end of the first leaf spring is connected to the bottom of the support barrel through the second spring;

[0021] The second transmission unit includes a reverse pawl meshing with the ratchet wheel, a second pawl guide rod, a second leaf spring and a second cylinder; one end of the second pawl guide rod is connected to one end of the reverse pawl, and the other end of the second pawl guide rod is connected to the piston rod of the second cylinder; the inflatable end of the second cylinder is connected to one end of the second pneumatic solenoid valve through the air passage; one end of the second leaf spring is connected to the other end of the reverse pawl, and the other end of the second leaf spring is connected to the bottom of the support barrel through the third spring;

[0022] The other end of the first pneumatic solenoid valve and the other end of the second pneumatic solenoid valve are respectively used to be connected to external air supply equipment.

[0023] Furthermore, the device also includes a control unit, a plurality of insulating pull rods and a sealing ring;

[0024] The control unit is connected to the first pneumatic solenoid valve and the second pneumatic solenoid valve respectively;

[0025] The sealing ring is arranged between the first electrode disk and one end of the first insulating cylinder, between the second electrode disk and one end of the second insulating cylinder, and between the trigger electrode and the other end of the first insulating cylinder and the other end of the second insulating cylinder respectively;

[0026] Multiple insulating pull rods are evenly distributed along the outer circumference of the first insulating cylinder and the second insulating cylinder. One end of the insulating pull rod is connected to the first electrode disk, and the other end is connected to the second electrode disk. They are used to fasten the first electrode disk, the second electrode disk, the first insulating cylinder, the second insulating cylinder and the trigger electrode.

[0027] Further, the trigger electrode is a disc structure;

[0028] The first insulating cylinder and the second insulating cylinder are made of organic glass material;

[0029] The module of the gear and the ratchet is 4 to 6.

[0030] Furthermore, the invention also includes a balance bar arranged at the bottom of the support barrel, and the balance bar is used to maintain balance with the rack;

[0031] One end of the balance rod passes through the support barrel and is connected to the bottom of the electrode ball head through a guide rod, and the other end is suspended in the air.

[0032] At the same time, the present invention also provides a method for adjusting the electrode spacing of the MV-class gas switch with adjustable electrode spacing, which is special in that it includes the following steps:

[0033] 1] Fill the MV-class gas switch with insulating gas;

[0034] 2] The first electrode adjustment mechanism and the second electrode adjustment mechanism are used to adjust the distance between the electrode ball head and the trigger electrode to complete the electrode spacing adjustment of the MV-level gas switch.

[0035] Further, step 1] is specifically as follows:

[0036] An external gas pipe is used to connect the gas channel in the trigger electrode, and the first insulating cavity and the second insulating cavity on both sides of the trigger electrode are filled with insulating gas.

[0037] Further, step 2] includes step 2.1 or step 2.2;

[0038] 2.1. Use the first electrode adjustment mechanism and / or the second electrode adjustment mechanism to adjust the electrode ball head close to the trigger electrode;

[0039] 2.2. Use the first electrode adjustment mechanism and / or the second electrode adjustment mechanism to adjust the electrode ball head away from the trigger electrode.

[0040] Furthermore, step 2.1 is specifically as follows:

[0041] Control the first pneumatic solenoid valve to inflate the first cylinder, the piston rod of the first cylinder pushes the first pawl guide rod to move linearly, the first pawl guide rod pushes the ratchet to rotate counterclockwise through the pawl, the ratchet drives the gear to rotate counterclockwise, the gear drives the rack to move linearly, the rack drives the guide rod to move linearly, the guide rod pushes the electrode ball head to move in a direction close to the trigger electrode, and after it is in place, it is locked by a stop pawl;

[0042] Step 2.2 is as follows:

[0043] Control the second pneumatic solenoid valve to inflate the second cylinder. The piston rod of the second cylinder pushes the second pawl guide rod to move linearly. The second pawl guide rod pushes the ratchet to rotate clockwise through the reverse pawl. The ratchet drives the gear to rotate clockwise. The gear pushes the rack to move linearly. The rack drives the guide rod to move linearly. The guide rod pulls the electrode ball head to move away from the trigger electrode. After it is in place, it is locked by the stop pawl.

[0044] Beneficial effects of the present invention:

[0045] 1. In the MV-class gas switch with adjustable electrode spacing of the present invention, the electrode ball head can realize adjustable and controllable distance in a closed space. Compared with the mode in which the gas switch with fixed electrode gap can only adjust the gas pressure, the present invention can realize high gas pressure and high field strength working state within a wider voltage range, and reduce the breakdown jitter of the gas switch within the full voltage range, improve the breakdown stability of the gas switch, and solve the problem that the electrode spacing of the MV-class gas switch is difficult to adjust and the related control drive system is susceptible to electromagnetic interference.

[0046] 2. The MV-level gas switch with adjustable electrode spacing of the present invention can be used in a gas switch with multiple gaps. The gaps between different electrode balls can be adjusted to an unequal spacing arrangement mode. The corresponding spacings can be adjusted according to the breakdown sequence of each gap to optimize the breakdown process of the gas switch and improve the breakdown stability of the gas switch.

[0047] 3. The MV-level gas switch of the present invention has adjustable electrode spacing. The gap can be adjusted accordingly for the front-stage excitation pulses with different parameters. The sensitivity of the breakdown characteristics of the gas switch to the excitation pulse is reduced, thereby improving the universality and robustness of the gas switch application.

[0048] 4. In the MV-level gas switch with adjustable electrode spacing of the present invention, the first electrode adjustment mechanism and the second electrode adjustment mechanism are both intermittent motion modes, which can adapt to multi-stage adjustment modes. Compared with single-stage adjustment, the range and accuracy of electrode ball head spacing adjustment are increased, and the adjustment accuracy of gas switch working parameters is improved.

[0049] 5. In the MV-level gas switch with adjustable electrode spacing of the present invention, a stop pawl is used to realize self-locking of the first electrode adjustment mechanism and the second electrode adjustment mechanism. After the adjustment is completed, the spacing will be fixed and is less affected by other parameters, thereby improving the accuracy of the gas switch operation.

[0050] 6. The electrode spacing adjustment method of the present invention can be applied in complex electromagnetic environments without being affected by electromagnetic damage, thereby improving the reliability of the gas switch operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of an embodiment of a MV-class gas switch with adjustable electrode spacing according to the present invention;

[0052] Figure 2 It is a structural schematic diagram of a first electrode adjustment mechanism in an embodiment of an MV-class gas switch with adjustable electrode spacing according to the present invention.

[0053] Description of reference numerals:

[0054] 11-first electrode disk, 12-second electrode disk, 201-first electrode adjustment mechanism, 202-second electrode adjustment mechanism, 20-support barrel, 21-rack, 22-gear, 23-ratchet, 24-pawl, 25-reverse pawl, 26-stop pawl, 27-guide rod, 28-first leaf spring, 29-second leaf spring, 210-first spring, 211-first pawl guide rod, 212-second pawl guide rod, 213-second spring, 214-third spring, 215-first cylinder, 216-second cylinder; 3-electrode ball head, 4-trigger electrode, 51-first insulating cylinder, 52-second insulating cylinder, 6-insulating pull rod, 7-pneumatic solenoid valve group, 71-first pneumatic solenoid valve, 72-second pneumatic solenoid valve, 8-balance rod. DETAILED DESCRIPTION

[0055] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] like Figure 1 , Figure 2 As shown, an MV-class gas switch with adjustable electrode spacing comprises a first electrode disk 11, a first insulating cylinder 51, a second insulating cylinder 52, a second electrode disk 12, and a first electrode adjustment mechanism 201, a second electrode adjustment mechanism 202, two electrode ball heads 3, a plurality of guide rods 27, a plurality of insulating pull rods 6, two pneumatic solenoid valve groups 7, a balance rod 8, a sealing ring, and a control unit.

[0057] A trigger electrode 4 is coaxially arranged between one end of the first insulating cylinder 51 and one end of the second insulating cylinder 52, the other end of the first insulating cylinder 51 is connected to the first electrode disk 11, the other end of the second insulating cylinder 52 is connected to the second electrode disk 12, and the first insulating cylinder 51, the first electrode disk 11 and the trigger electrode 4 form a first insulating cavity, and the second insulating cylinder 52, the second electrode disk 12 and the trigger electrode 4 form a second insulating cavity; the first electrode adjustment mechanism 201 is coaxially arranged in the first insulating cavity, and the first electrode adjustment mechanism One end of 201 is connected to the first electrode disk 11; the second electrode adjustment mechanism 202 is coaxially arranged in the second insulating cylinder 52, and one end of the second electrode adjustment mechanism 202 is connected to the second electrode disk 12; the other end of the first electrode adjustment mechanism 201 and the other end of the second electrode adjustment mechanism 202 are coaxially slidably connected to the two electrode ball heads 3 through the guide rod 27 respectively; a discharge gap is formed between the two electrode ball heads 3 and the trigger electrode 4 respectively; airways are respectively arranged on the first electrode disk 11, the second electrode disk 12 and the trigger electrode 4.

[0058] The pneumatic solenoid valve group 7 includes a first pneumatic solenoid valve 71 and a second pneumatic solenoid valve 72 .

[0059] The first electrode adjustment mechanism 201 includes a support barrel 20 coaxially arranged in the first insulating cylinder 51 and open at one end, a ratchet 23 arranged at the bottom of the support barrel 20, a gear 22 coaxially arranged on the ratchet 23, a rack 21 meshing with the gear 22, a stop pawl 26, a first spring 210, a second spring 213, a third spring 214, a first transmission unit and a second transmission unit; the open end of the support barrel 20 is connected to the inner side of the first electrode disk 11; the diameter of the gear 22 is smaller than the diameter of the ratchet 23; one end of the stop pawl 26 is connected to the bottom of the support barrel 20 through the first spring 210, and the other end is meshed with the ratchet 23 to prevent the ratchet 23 from rotating; the first transmission unit is used to drive the ratchet to rotate counterclockwise, one end of which is connected to the bottom of the support barrel 20 through the second spring 213, and the other end is meshed with the ratchet 23 One end passes through the air passage on one side of the first electrode disk 11 and is connected to one end of the first pneumatic solenoid valve 71; the second transmission unit is used to drive the ratchet to rotate clockwise, one end of which is connected to the bottom of the support barrel 20 through the third spring 214, and the other end passes through the air passage on the other side of the first electrode disk 11 and is connected to one end of the second pneumatic solenoid valve 72; the first transmission unit and the second transmission unit are both used to drive the ratchet 23 to rotate, and the ratchet 23 is used to drive the gear 22 to rotate; one end of the rack 21 is connected to the bottom of the electrode ball head 3 through the guide rod 27, and the other end is meshed with the gear 22; the gear 22 is used to drive the rack 21 to translate, and the rack 21 is used to drive the guide rod 27 to push and pull the electrode ball head 3 away from or close to the trigger electrode 4; the second electrode adjustment mechanism 202 has the same structure as the first electrode adjustment mechanism 201. The balance bar 8 is set at the bottom of the support barrel to maintain balance with the rack 21; one end of the balance bar 8 passes through the support barrel through the guide rod and is connected to the bottom of the electrode ball head, and the other end is suspended.

[0060] The first transmission unit includes a pawl 24 meshing with the ratchet 23, a first pawl guide rod 211, a first leaf spring 28 and a first cylinder 215; one end of the first pawl guide rod 211 is connected to one end of the pawl 24, and the other end of the first pawl guide rod 211 is connected to the piston rod of the first cylinder 215; the inflation end of the first cylinder 215 passes through the air channel on the first electrode disk 11 and is connected to one end of the first pneumatic solenoid valve 71; one end of the first leaf spring 28 is connected to the other end of the pawl 24, and the other end of the first leaf spring 28 is connected to the bottom of the support barrel 20 through the second spring 213.

[0061] The second transmission unit includes a reverse pawl 25 meshing with the ratchet 23, a second pawl guide rod 212, a second leaf spring 29 and a second cylinder 216; one end of the second pawl guide rod 212 is connected to one end of the reverse pawl 25, and the other end of the second pawl guide rod 212 is connected to the piston rod of the second cylinder 216; the inflation end of the second cylinder 216 passes through the air channel on the first electrode disk 11 and is connected to one end of the second pneumatic solenoid valve 72; one end of the second leaf spring 29 is connected to the other end of the reverse pawl 25, and the other end of the second leaf spring 29 is connected to the bottom of the support barrel 20 through the third spring 214; the other end of the first pneumatic solenoid valve 71 and the other end of the second pneumatic solenoid valve 72 are respectively used to connect to an external air supply device; wherein, a linear motion pair is formed between the first pawl guide rod 211, the second pawl guide rod 212, the guide rod 27 and the support barrel 20, and a rotation pair is formed between the gear 22, the ratchet 23 and the barrel wall of the support barrel 20, which converts the linear motion into circular intermittent motion.

[0062] In this embodiment, the air passages in the first electrode disk 11 and the second electrode disk 12 are connected to the first pneumatic solenoid valve 71 and the second pneumatic solenoid valve 72 on the outside, and the air passages in the first electrode disk 11 and the second electrode disk 12 are connected to the filling holes of the first cylinder 215 and the filling holes of the second cylinder 216 on the inside. After the first pneumatic solenoid valve 71 is actuated, the movement of the electrode ball head 3 is controlled, wherein the first pneumatic solenoid valve 71 is placed in the electromagnetic shielding space and communicates with the control unit to execute instructions. When adjusting the position of the electrode ball head 3, the number of actions of the first pneumatic solenoid valve 71, i.e., the rotation angle of the ratchet 23 and the position of the electrode ball head 3 are recorded. When adjusting again, corresponding adjustments can be made according to the last position record value, and the positions of the electrode ball heads 3 on both sides can also be adjusted at the same time. According to the actual use conditions, the positions of the electrode ball heads 3 on both sides relative to the trigger electrode 4 can be adjusted differentially.

[0063] The control unit is connected to the first pneumatic solenoid valve 71 and the second pneumatic solenoid valve 72 respectively. The first pneumatic solenoid valve 71 and the second pneumatic solenoid valve 72 are both used to control the movement of the first electrode adjustment mechanism 201 and the second electrode adjustment mechanism 202. The first electrode adjustment mechanism 201 and the second electrode adjustment mechanism 202 are both used to drive the guide rod 27 to push and pull the electrode ball head 3 away from or close to the trigger electrode 4.

[0064] In this embodiment, a sealing ring is installed between the first electrode disk 11 and one end of the first insulating cylinder 51, a sealing ring is installed between the second electrode disk 12 and one end of the second insulating cylinder 52, and sealing rings are installed between the trigger electrode 4 and one end of the first insulating cylinder 51 and one end of the second insulating cylinder 52; multiple insulating pull rods 6 are evenly distributed along the outer circumference of the first insulating cylinder 51 and the second insulating cylinder 52, one end of the insulating pull rod 6 passes through the first electrode disk 11 and is locked with a nut, and the other end passes through the second electrode disk 12 and is locked with a nut, and the first electrode disk 11, the second electrode disk 12, the first insulating cylinder 51, the second insulating cylinder 52 and the trigger electrode 4 are fastened with locking nuts at both ends. The trigger electrode 4 is a disc structure; the first insulating cylinder 51 and the second insulating cylinder 52 are both made of organic glass; the module of the gear 22 and the ratchet 23 is 5, and the number of teeth of the ratchet 23 can also be determined according to the working conditions, and the number of teeth can determine the rotation angle of the ratchet 23 after a single feed. The module of the gear 22 and the rack 21 can also be determined according to the actual working conditions, and the module and the number of teeth of the ratchet 23 jointly determine the displacement adjustment value of the electrode ball head 3 during a single feed; the first insulating cavity and the second insulating cavity can be filled with insulating gas of a certain pressure.

[0065] The working process of the MV-level gas switch with adjustable electrode spacing of the present invention is as follows:

[0066] After the control unit controls the ventilation action of the first pneumatic solenoid valve 71, the first pneumatic solenoid valve 71 controls the first cylinder 215 to push the first pawl guide rod 211 to make a linear motion downward. After the pawl 24 on the first pawl guide rod 211 meshes with the ratchet 23 and pushes the ratchet 23 to rotate counterclockwise by a certain angle, since the stop pawl 26 meshes with the ratchet 23, the stop pawl 26 self-locks and fixes the position of the ratchet 23; the gear 22 coaxially fixed to the ratchet 23 rotates counterclockwise by the same angle at the same time, and meshes with the rack 21 to push the rack 21 to move linearly downward for a distance and then fix its position. The electrode ball head 3 fixedly connected to the rack 21 immediately reduces the relative distance from the trigger electrode 4 and maintains a fixed position; during this process, the reverse pawl 25 remains stationary.

[0067] When the first cylinder 215 retreats upward, the second spring 213 pushes the first leaf spring 28 to reset upward, and the first leaf spring 28 also pushes the pawl 24 to reset, waiting for the first pneumatic solenoid valve 71 to act again to complete the next movement. After the second pneumatic solenoid valve 72 acts, the reverse pawl 25 pushes the ratchet 23 to rotate clockwise in the same way, pushing the main electrode ball head 3 to move linearly in the reverse direction and position, at which time the relative distance between the electrode ball head 3 and the trigger electrode 4 increases.

[0068] When adjusting the relative distance between the electrode ball head 3 and the trigger electrode 4, it can be first driven back to the zero position by the second pneumatic solenoid valve 72, and then driven to the command position by the first pneumatic solenoid valve 71, and the air pressure in the first insulating cavity and the second insulating cavity is reduced to facilitate the action of the first cylinder 215 and the second cylinder 216.

[0069] The MV-class gas switch with adjustable electrode spacing of the present invention can adjust the relative distance between the electrode ball head 3 and the trigger electrode 4 to different scales under different voltage levels, and maintain the high gas pressure state in the first insulating cavity and the second insulating cavity, so that the MV-class gas switch can work under high field strength conditions, effectively improving the breakdown stability of the MV-class gas switch. In the MV-class gas switch, different electrode ball heads 3 can be adjusted to different distances relative to the trigger electrode 4, and the overvoltage coefficient is adjusted accordingly according to the breakdown sequence of different gaps in the MV-class gas switch to optimize the breakdown process of the MV-class gas switch and improve its breakdown stability. The self-locking structure adopted therein, after the position of the electrode ball head 3 is adjusted, its distance relative to the trigger electrode 4 will not change when the gas pressure in the first insulating cavity and the second insulating cavity increases, which can effectively improve the accuracy of the MV-class gas switch action. The first electrode adjustment mechanism 201 and the second electrode adjustment mechanism 202 complete the relative distance adjustment between the electrode ball head 3 and the trigger electrode 4 only through pneumatic control, and can be connected to the first pneumatic solenoid valve 71 and the second pneumatic solenoid valve 72. The first pneumatic solenoid valve 71 and the second pneumatic solenoid valve 72 can be placed in a shielded space away from a strong electromagnetic field and complete remote control. Their operation is not affected by electromagnetic interference and electromagnetic damage, and can effectively improve the reliability of the operation of MV-level gas switches.

[0070] A method for adjusting the electrode spacing of the MV-class gas switch with adjustable electrode spacing comprises the following steps:

[0071] 1] Install MV-level gas switch, specifically:

[0072] Assemble the MV-level gas switch, and connect the air charging port of the pneumatic solenoid valve group 7 to the air passages of the first electrode disk 11 and the second electrode disk 12 .

[0073] 2] Fill the MV-class gas switch with insulating gas, specifically:

[0074] After the external air pipe is connected to the air channel in the trigger electrode 4 , insulating gas of a certain pressure can be filled into the insulating cavities on both sides of the trigger electrode 4 .

[0075] 3] The distance between the electrode ball head 3 and the trigger electrode 4 is adjusted by using the first electrode adjustment mechanism 201 and the second electrode adjustment mechanism 202 to complete the electrode spacing adjustment of the MV-level gas switch.

[0076] 3.1. Use the first electrode adjustment mechanism 201 and the second electrode adjustment mechanism 202 to adjust the electrode ball head 3 to be close to the trigger electrode 4, specifically:

[0077] The first pneumatic solenoid valve 71 is controlled by an external control unit to inflate the first cylinder 215, and the piston rod of the first cylinder 215 pushes the first pawl guide rod 211 to move linearly, and the first pawl guide rod 211 pushes the ratchet 23 to rotate counterclockwise through the pawl 24, and the ratchet 23 drives the gear 22 to rotate counterclockwise, and the gear 22 pushes the rack 21 to move linearly, and the rack 21 drives the guide rod 27 to move linearly, and the guide rod 27 pushes the electrode ball head 3 to move in a direction close to the trigger electrode 4, and is locked by the stop pawl 26 after it is in place.

[0078] 3.2. Use the first electrode adjustment mechanism 201 or the second electrode adjustment mechanism 202 to adjust the electrode ball head 3 away from the trigger electrode 4, specifically:

[0079] The second pneumatic solenoid valve 72 is controlled by an external control unit to inflate the second cylinder 216. The piston rod of the second cylinder 216 pushes the second pawl guide rod 212 to move linearly. The second pawl guide rod 212 pushes the ratchet 23 to rotate clockwise through the reverse pawl 215. The ratchet 23 drives the gear 22 to rotate clockwise. The gear 22 pushes the rack 21 to move linearly. The rack 21 drives the guide rod 27 to move linearly. The guide rod 27 pulls the electrode ball head 3 to move away from the trigger electrode 4. After it is in place, it is locked by the stop pawl 26.

[0080] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An MV-class gas switch with adjustable electrode spacing, characterized in that: It comprises a first electrode disk (11), a first insulating cylinder (51), a second insulating cylinder (52), a second electrode disk (12), a first electrode adjustment mechanism (201), a second electrode adjustment mechanism (202), two electrode ball heads (3), a guide rod (27), and two pneumatic solenoid valve groups (7) which are coaxially arranged in sequence; A trigger electrode (4) is coaxially arranged between one end of the first insulating cylinder (51) and one end of the second insulating cylinder (52); the other end of the first insulating cylinder (51) is connected to the first electrode disk (11); the other end of the second insulating cylinder (52) is connected to the second electrode disk (12); the first insulating cylinder (51), the first electrode disk (11) and the trigger electrode (4) form a first insulating cavity; and the second insulating cylinder (52), the second electrode disk (12) and the trigger electrode (4) form a second insulating cavity; The first electrode adjustment mechanism (201) is coaxially arranged in the first insulating cavity, and one end of the first electrode adjustment mechanism (201) is connected to the first electrode disk (11); the second electrode adjustment mechanism (202) is coaxially arranged in the second insulating cylinder (52), and one end of the second electrode adjustment mechanism (202) is connected to the second electrode disk (12); the other end of the first electrode adjustment mechanism (201) and the other end of the second electrode adjustment mechanism (202) are coaxially slidably connected to two electrode ball heads (3) through guide rods (27); and a discharge gap is formed between the two electrode ball heads (3) and the trigger electrode (4); The first electrode disk (11), the second electrode disk (12) and the trigger electrode (4) are respectively provided with air passages; the air passages on the trigger electrode (4) are used to fill the first insulating cavity and the second insulating cavity with insulating gas; one end of the two pneumatic solenoid valve groups (7) respectively passes through the air passages of the first electrode disk (11) and the second electrode disk (12) and is connected to an end of the first electrode adjustment mechanism (201) away from the electrode ball head (3) and an end of the second electrode adjustment mechanism (202) away from the electrode ball head (3); the other ends of the two pneumatic solenoid valve groups (7) are used to connect to an external gas supply device to provide driving force for the first electrode adjustment mechanism (201) and the second electrode adjustment mechanism (202); the first electrode adjustment mechanism (201) and the second electrode adjustment mechanism (202) are both used to drive the guide rod (27) to push or pull the electrode ball head (3) away from or towards the trigger electrode (4).

2. The MV-class gas switch with adjustable electrode spacing according to claim 1, characterized in that: The first electrode adjustment mechanism (201) comprises a support barrel (20) coaxially arranged in a first insulating cylinder (51) and having an opening at one end, a ratchet (23) arranged at the bottom of the support barrel (20), a gear (22), a rack (21), a stop pawl (26), a first spring (210), a second spring (213), a third spring (214), a first transmission unit, and a second transmission unit; The pneumatic solenoid valve group (7) comprises a first pneumatic solenoid valve (71) and a second pneumatic solenoid valve (72); The open end of the support barrel (20) is connected to the inner side of the first electrode disk (11); The gear (22) is coaxially arranged on the ratchet (23), and its diameter is smaller than that of the ratchet (23); One end of the stopping pawl (26) is connected to the bottom of the support barrel (20) through a first spring (210), and the other end is engaged with the ratchet wheel (23) to prevent the ratchet wheel (23) from rotating. One end of the first transmission unit is connected to the bottom of the support barrel (20) via a second spring (213), and the other end passes through the air passage and is connected to one end of the first pneumatic solenoid valve (71); One end of the second transmission unit is connected to the bottom of the support barrel (20) through a third spring (214), and the other end passes through the air passage and is connected to one end of the second pneumatic solenoid valve (72); the first transmission unit and the second transmission unit are both used to drive the ratchet (23) to rotate, and the ratchet (23) is used to drive the gear (22) to rotate; One end of the rack (21) passes through the bottom of the support barrel (20) through a guide rod (27) and is connected to the bottom of the electrode ball head (3), and the other end is meshed with a gear (22). The gear (22) is used to drive the rack (21) to move linearly, and the rack (21) is used to drive the guide rod (27) to push the electrode ball head (3) away from or close to the trigger electrode (4); The second electrode adjustment mechanism (202) has the same structure as the first electrode adjustment mechanism (201).

3. The MV-class gas switch with adjustable electrode spacing according to claim 2, characterized in that: The first transmission unit comprises a pawl (24) meshed with the ratchet wheel (23), a first pawl guide rod (211), a first leaf spring (28) and a first cylinder (215); one end of the first pawl guide rod (211) is connected to one end of the pawl (24), and the other end of the first pawl guide rod (211) is connected to the piston rod of the first cylinder (215); the inflation end of the first cylinder (215) passes through the air passage and is connected to one end of the first pneumatic solenoid valve (71); one end of the first leaf spring (28) is connected to the other end of the pawl (24), and the other end of the first leaf spring (28) is connected to the bottom of the support barrel (20) through the second spring (213); The second transmission unit comprises a reverse pawl (25) meshed with the ratchet wheel (23), a second pawl guide rod (212), a second leaf spring (29) and a second cylinder (216); one end of the second pawl guide rod (212) is connected to one end of the reverse pawl (25), and the other end of the second pawl guide rod (212) is connected to the piston rod of the second cylinder (216); the inflation end of the second cylinder (216) is connected to one end of the second pneumatic solenoid valve (72) through the air passage; one end of the second leaf spring (29) is connected to the other end of the reverse pawl (25), and the other end of the second leaf spring (29) is connected to the bottom of the support barrel (20) through the third spring (214); The other end of the first pneumatic solenoid valve (71) and the other end of the second pneumatic solenoid valve (72) are respectively used to be connected to external air supply equipment.

4. The MV-class gas switch with adjustable electrode spacing according to claim 3, characterized in that: It also includes a control unit, a plurality of insulating pull rods (6) and a sealing ring; The control unit is connected to the first pneumatic solenoid valve (71) and the second pneumatic solenoid valve (72) respectively; The sealing ring is arranged between the first electrode disk (11) and one end of the first insulating cylinder (51), between the second electrode disk (12) and one end of the second insulating cylinder (52), and between the trigger electrode (4) and the other end of the first insulating cylinder (51) and the other end of the second insulating cylinder (52); A plurality of insulating pull rods (6) are evenly distributed along the outer circumference of the first insulating cylinder (51) and the second insulating cylinder (52); one end of the insulating pull rod (6) is connected to the first electrode disk (11), and the other end is connected to the second electrode disk (12), and is used to fasten the first electrode disk (11), the second electrode disk (12), the first insulating cylinder (51), the second insulating cylinder (52) and the trigger electrode (4).

5. The MV-class gas switch with adjustable electrode spacing according to claim 4, characterized in that: The trigger electrode (4) is a disc structure; The first insulating cylinder (51) and the second insulating cylinder (52) are made of organic glass material; The modules of the gear (22) and the ratchet (23) are 4 to 6.

6. The MV-class gas switch with adjustable electrode spacing according to any one of claims 2 to 5, characterized in that: It also includes a balance bar (8) arranged at the bottom of the support barrel (20), and the balance bar (8) is used to maintain balance with the rack (21); One end of the balance rod (8) passes through the support barrel (20) via a guide rod (27) and is connected to the bottom of the electrode ball head (3), while the other end is suspended in the air.

7. A method for adjusting the electrode spacing of an MV-class gas switch with adjustable electrode spacing according to any one of claims 1 to 6, characterized in that: The following steps are involved: 1] Fill the MV-class gas switch with insulating gas; 2] The first electrode adjustment mechanism (201) and the second electrode adjustment mechanism (202) are used to adjust the distance between the electrode ball head (3) and the trigger electrode (4), thereby completing the electrode spacing adjustment of the MV-level gas switch.

8. The electrode spacing adjustment method of the MV-class gas switch with adjustable electrode spacing according to claim 7, characterized in that: Step 1] Specifically: An external gas pipe is used to connect the gas channel in the trigger electrode (4), and the first insulating cavity and the second insulating cavity on both sides of the trigger electrode (4) are filled with insulating gas.

9. The electrode spacing adjustment method of the MV-class gas switch with adjustable electrode spacing according to claim 8, characterized in that: Step 2] includes step 2.1 or step 2.2; 2.

1. Using the first electrode adjustment mechanism (201) and / or the second electrode adjustment mechanism (202) to adjust the electrode ball head (3) to be close to the trigger electrode (4); 2.

2. Use the first electrode adjustment mechanism (201) and / or the second electrode adjustment mechanism (202) to adjust the electrode ball head (3) away from the trigger electrode (4).

10. The electrode spacing adjustment method of the MV-class gas switch with adjustable electrode spacing according to claim 9, characterized in that: Step 2.1 is as follows: The first pneumatic solenoid valve (71) is controlled to inflate the first cylinder (215), the piston rod of the first cylinder (215) pushes the first ratchet guide rod (211) to move linearly, the first ratchet guide rod (211) pushes the ratchet wheel (23) to rotate counterclockwise through the ratchet wheel (24), the ratchet wheel (23) drives the gear (22) to rotate counterclockwise, the gear (22) pushes the rack (21) to move linearly, the rack (21) drives the guide rod (27) to move linearly, the guide rod (27) pushes the electrode ball head (3) to move in a direction close to the trigger electrode (4), and after it is in place, it is locked by using the stop ratchet (26); Step 2.2 is as follows: The second pneumatic solenoid valve (72) is controlled to inflate the second cylinder (216), the piston rod of the second cylinder (216) pushes the second ratchet guide rod (212) to move linearly, the second ratchet guide rod (212) pushes the ratchet wheel (23) to rotate clockwise through the reverse ratchet wheel (25), the ratchet wheel (23) drives the gear (22) to rotate clockwise, the gear (22) pushes the rack (21) to move linearly, the rack (21) drives the guide rod (27) to move linearly, the guide rod (27) pulls the electrode ball head (3) to move in a direction away from the trigger electrode (4), and after it is in place, it is locked by the stop ratchet (26).

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