An insulation gas short-circuit discharge device and a converter valve tower

Abstract

The utility model provides a kind of insulated gas short-circuit discharge device and converter valve tower, including drive mechanism and multiple short-circuit discharge mechanisms being arranged along the length direction of converter valve tower interval, each short-circuit discharge mechanism includes discharge box, transmission mechanism, discharge assembly, discharge assembly includes moving contact unit, static contact unit and terminal unit, discharge box is filled with insulated gas, the drive end of drive mechanism is telescopically arranged along the length direction of converter valve tower.The whole discharge assembly is connected with the positive and negative poles of capacitor by terminal unit, so as to drive multiple transmission mechanisms to simultaneously autorotate when telescoping by drive mechanism, transmission mechanism autorotation drives moving contact unit installed and connected to rotate to contact with static contact unit, so as to realize the short-circuit discharge between positive and negative poles, multiple components can simultaneously realize short-circuit discharge, greatly improve short-circuit discharge efficiency, artificial remote control drive mechanism can be simultaneously improved work safety.

Description

Technical Field

[0001] This utility model relates to the field of short-circuit discharge technology, and in particular to an insulating gas short-circuit discharge device and a converter valve tower. Background Technology

[0002] In recent years, flexible DC transmission technology has gained widespread application due to its advantages of independently adjusting active and reactive power, enabling it to transmit power to wireless networks. This overcomes the inherent defects of traditional high-voltage DC transmission, extends the advantages of high-voltage DC transmission to distribution networks, and greatly broadens the application scope of high-voltage DC transmission. my country is rich in natural resources, so flexible DC technology has been widely used.

[0003] The converter valve tower is a core component of voltage source converter high-voltage direct current transmission technology, and the safety of its operation and maintenance is paramount. As the voltage continuously increases, the voltage of each sub-unit of the converter valve also gradually increases. However, during maintenance power outages, it is impossible to determine whether the capacitors of each sub-unit have fully discharged, nor is there an effective measure to discharge all the DC capacitors of all sub-units in the tower at once. Therefore, performing maintenance on the tower without fully discharging the DC capacitors of all sub-units poses a significant safety risk to personnel.

[0004] A better approach now is to design a small discharge rod with a discharge resistor connected in series in the positive and negative circuits. This way, personnel can discharge the capacitors of each sub-unit before performing maintenance. However, this approach has two problems. First, there's the issue of convenience. Since a single discharge device is quite large, its operation is cumbersome, and discharging the capacitors of hundreds of sub-units in each valve tower is a huge workload. Second, there's the issue of safety. Because the sub-unit voltage is high, improper selection of the discharge resistor or improper operation can easily cause voltage surges. Additionally, the operation time for a single discharge rod is difficult to determine.

[0005] Therefore, it is necessary to propose an insulating gas short-circuit discharge device and a converter valve tower to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0006] The main purpose of this invention is to provide an insulating gas short-circuit discharge device and a converter valve tower to solve the problems of large workload and poor safety of existing short-circuit discharge devices.

[0007] To achieve the above objectives, this utility model provides an insulating gas short-circuit discharge device, including a driving mechanism and a plurality of short-circuit discharge mechanisms spaced apart along the length of the converter valve tower. Each of the short-circuit discharge mechanisms includes a discharge box, a transmission mechanism, and a discharge component built into the discharge box; wherein,

[0008] The discharge assembly includes a moving contact unit, a stationary contact unit, and a terminal unit. The transmission mechanism is connected to the center of the discharge box and is rotatably mounted. One end of the moving contact unit is connected to the transmission mechanism, and the other end of the moving contact unit is used to contact the stationary contact unit. The stationary contact unit is fixed in the discharge box. The first end of the terminal unit is internally connected to the discharge box, and the second end of the terminal unit extends out of the discharge box for connection with a capacitor.

[0009] The discharge box is filled with insulating gas. The discharge box and the drive mechanism are both connected to the capacitor. The drive mechanism is located at the end of the converter valve tower and is spaced apart from the short-circuit discharge mechanism located at the end. The drive end of the drive mechanism is extendable along the length of the converter valve tower and is connected to each of the transmission mechanisms to drive the transmission mechanisms to rotate.

[0010] Preferably, the transmission mechanism includes a rotating arm, a rotating shaft, and a circular boss. The circular boss is sleeved and connected to the rotating shaft. The rotating shaft is vertically connected to the center of the discharge box and is rotatably arranged. The top end of the rotating shaft extends out of the discharge box. The rotating arm is connected to the top end of the rotating shaft. The driving end of the driving mechanism is connected to the end of the rotating arm.

[0011] Preferably, the moving contact unit includes a first moving contact, the stationary contact unit includes a first stationary contact, and the terminal unit includes a first terminal and a connecting terminal; wherein,

[0012] The first stationary contact is fixed to the inner wall of the discharge box. One end of the first moving contact is fixed to the circular protrusion. The other end of the first moving contact is cantilevered radially outward from the circular protrusion to contact the first stationary contact. The first end of the first terminal is connected to the first stationary contact. The second end of the first terminal extends out of the discharge box to connect to the positive terminal of the capacitor located at the bottom of the discharge box. The first end of the connecting terminal is sleeved on the rotating shaft and abuts against the circular protrusion. The second end of the connecting terminal extends out of the discharge box to connect to the negative terminal of the capacitor located at the bottom of the discharge box.

[0013] Preferably, the moving contact unit further includes a second moving contact and a third moving contact, the stationary contact unit further includes a second stationary contact and a third stationary contact, and the terminal unit further includes a second terminal and a third terminal; wherein,

[0014] The second stationary contact and the third stationary contact are both fixed to the inner wall of the discharge box. One end of the second moving contact and one end of the third moving contact are both fixed to the circular protrusion. The other end of the second moving contact is cantilevered radially outward from the circular protrusion to contact the second stationary contact. The other end of the third moving contact is cantilevered radially outward from the circular protrusion to contact the third stationary contact. The first end of the second terminal is connected to the second stationary contact. The second end of the second terminal extends out of the discharge box to connect to the positive terminal of the capacitor on the adjacent side. The first end of the third terminal is connected to the third stationary contact. The second end of the third terminal extends out of the discharge box to connect to the negative terminal of the capacitor on the adjacent side.

[0015] Preferably, the first stationary contact, the second stationary contact, and the third stationary contact are arranged at equal intervals along the circumference of the circular boss, and the first moving contact, the second moving contact, and the third moving contact are arranged at equal intervals along the circumference of the circular boss.

[0016] Preferably, a raised ridge is formed at one end of the first stationary contact near the first moving contact, and the raised ridge extends circumferentially along the circular boss.

[0017] Preferably, the driving mechanism includes a cylinder and a transmission rod. The cylinder is disposed at the end of the converter valve tower and spaced apart from the short-circuit discharge mechanism located at the end. The driving end of the cylinder is telescopically disposed along the length direction of the converter valve tower and fixedly connected to one end of the transmission rod. The transmission rod extends along the length direction of the converter valve tower and is respectively connected to the rotating arm of each of the transmission mechanisms.

[0018] Preferably, the discharge box includes a housing and a sealing cover. The top of the housing is recessed to form four grooves, which are respectively used for the first terminal, the second terminal, the third terminal, and the connecting terminal to extend out. The sealing cover is detachably connected to the top of the housing and has a through hole for the rotating shaft to pass through.

[0019] Preferably, the insulating gas is SF6 gas.

[0020] This application also provides a converter valve tower, including a valve tower body and multiple capacitor banks arranged vertically at intervals. Each layer of the capacitor bank includes multiple capacitors arranged side by side along the length direction of the valve tower body. It also includes the insulating gas short-circuit discharge device as described above. Each layer of the capacitor bank is correspondingly provided with one insulating gas short-circuit discharge device. The driving mechanism and short-circuit discharge mechanism of the insulating gas short-circuit discharge device are both connected to the capacitors, and the driving mechanism of the insulating gas short-circuit discharge device is located at the end of the capacitor bank.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This utility model provides an insulating gas short-circuit discharge device and a converter valve tower, including a drive mechanism and multiple short-circuit discharge mechanisms spaced apart along the length of the converter valve tower. Each short-circuit discharge mechanism includes a discharge box, a transmission mechanism, and a discharge component built into the discharge box. The discharge component includes a moving contact unit, a stationary contact unit, and a terminal unit. The transmission mechanism is connected to the center of the discharge box and is rotatably arranged. One end of the moving contact unit is connected to the transmission mechanism, and the other end of the moving contact unit is used to contact the stationary contact unit. The stationary contact unit is fixed in the discharge box. The first end of the terminal unit is built into the discharge box, and the second end of the terminal unit extends out of the discharge box for connection with a capacitor. The discharge box is filled with insulating gas. The discharge box and the drive mechanism are both connected to the capacitor. The drive mechanism is located at the end of the converter valve tower and spaced apart from the short-circuit discharge mechanisms located at the end. The drive end of the drive mechanism is telescopically arranged along the length of the converter valve tower and is connected to each transmission mechanism to drive the transmission mechanism to rotate. The entire discharge assembly is connected to the positive and negative terminals of the capacitor through the terminal unit. When the drive mechanism extends or retracts, it drives multiple transmission mechanisms to rotate simultaneously. When the transmission mechanisms rotate, they drive the moving contact unit connected to them to rotate until it contacts the stationary contact unit, thereby realizing short-circuit discharge between the positive and negative terminals. Multiple components can achieve short-circuit discharge at the same time, which greatly improves the short-circuit discharge efficiency. The drive mechanism can be operated remotely by the operator, which also improves the safety of operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1This is a three-dimensional schematic diagram of the short-circuit discharge mechanism after removing the sealing cover in one embodiment of the present invention.

[0025] Figure 2 This is a plan view of the short-circuit discharge mechanism after removing the sealing cover in one embodiment of the present invention.

[0026] Figure 3 This is a perspective view of the overall structure of this utility model in an application scenario according to one embodiment;

[0027] Figure 4 This is a partial schematic diagram of the assembly of the end short-circuit discharge mechanism and the drive mechanism in one embodiment of the present invention.

[0028] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0029] Explanation of icon numbers:

[0030] 10. Discharge box; 110. Housing; 111. Groove; 120. Sealing cover; 20. Transmission mechanism; 210. Rotating arm; 220. Rotating shaft; 230. Circular boss; 30. Discharge assembly; 310. Moving contact unit; 311. First moving contact; 312. Second moving contact; 313. Third moving contact; 320. Stationary contact unit; 321. First stationary contact; 3211. Raised bar; 322. Second stationary contact; 323. Third stationary contact; 330. Terminal unit; 331. First terminal; 332. Second terminal; 333. Third terminal; 334. Connecting terminal; 40. Drive mechanism; 410. Cylinder; 420. Transmission rod; 50. Converter valve tower; 510. Valve tower body; 520. Capacitor. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] Please see the appendix Figure 1-4 An embodiment of the present invention provides an insulating gas short-circuit discharge device, comprising a drive mechanism 40 and a plurality of short-circuit discharge mechanisms spaced apart along the length of a converter valve tower 50. Each of the short-circuit discharge mechanisms includes a discharge box 10, a transmission mechanism 20, and a discharge component 30 built into the discharge box 10. The specific scheme is as follows:

[0036] The discharge assembly 30 includes a moving contact unit 310, a stationary contact unit 320, and a terminal unit 330. The transmission mechanism 20 is connected to the center of the discharge box 10 and is rotatably mounted. One end of the moving contact unit 310 is connected to the transmission mechanism 20, and the other end of the moving contact unit 310 is used to contact the stationary contact unit 320. The stationary contact unit 320 is fixed in the discharge box 10. The first end of the terminal unit 330 is internally connected to the discharge box 10. The second end of the subunit 330 extends out of the discharge box 10 for connection with the capacitor 520; the discharge box 10 is filled with insulating gas, and the discharge box 10 and the drive mechanism 40 are both connected to the capacitor 520. The drive mechanism 40 is located at the end of the converter valve tower 50 and is spaced apart from the short-circuit discharge mechanism located at the end. The drive end of the drive mechanism 40 is extendable along the length of the converter valve tower 50 and is connected to each of the transmission mechanisms 20 to drive the transmission mechanism 20 to rotate.

[0037] Specifically, the insulating gas short-circuit discharge device in this application includes a drive mechanism 40 and multiple short-circuit discharge mechanisms spaced apart along the length of the converter valve tower 50. Considering that multiple capacitors 520 are usually installed on each layer of the converter valve tower 50, multiple short-circuit discharge mechanisms are required to cooperate with the drive mechanism 40 to achieve simultaneous short-circuit discharge of multiple capacitors 520, thereby improving the short-circuit discharge efficiency. Each short-circuit discharge mechanism includes a discharge box 10, a transmission mechanism 20, and a discharge component 30 built into the discharge box 10. The discharge box 10 is used for mounting the transmission mechanism 20 and the discharge component 30. The transmission mechanism 20 is used to cooperate with the drive end of the drive mechanism 40, thereby achieving the state adjustment of the internal discharge component 30 after being driven, and achieving the purpose of short-circuit discharge.

[0038] The discharge assembly 30 includes a moving contact unit 310, a stationary contact unit 320, and a terminal unit 330. Its principle is to connect the positive and negative terminals of the capacitor 520 to the discharge assembly 30 inside the discharge box 10 through the terminal unit 330. When the moving contact unit 310 and the stationary contact unit 320 come into contact, a short-circuit discharge effect is achieved. Therefore, to achieve this state switching, a transmission mechanism 20 is provided to cooperate with the extension and retraction of the drive mechanism 40. The transmission mechanism 20 is connected to the discharge box 10. The moving contact unit 310 is rotatably positioned at the center of the transmission mechanism 20. One end of the moving contact unit 310 is connected to the transmission mechanism 20. When the transmission mechanism 20 rotates, the moving contact unit 310 rotates together. Therefore, the other end of the moving contact unit 310 is used to contact the stationary contact unit 320. That is, the movement trajectory of the moving contact unit 310 and the stationary contact unit 320 have a limiting intersection point. When they intersect, a capacitor discharge resistor is connected, and short-circuiting discharge begins between the positive and negative terminals.

[0039] In detail, the rotation of the transmission mechanism 20 is driven by the drive mechanism 40. The drive end of the drive mechanism 40 is telescopically arranged along the length of the converter valve tower 50, and can be connected to the end of the transmission mechanism 20. Thus, when the drive mechanism 40 extends, it drives the end of the transmission mechanism 20 to move. Since the position of the transmission mechanism 20 itself is stationary and it can only rotate on its own, the movement of the end of the transmission mechanism 20 is converted into rotation around the center to drive the moving contact unit 310. In a preferred embodiment of this application, the transmission mechanism 20 includes a rotating arm 210, a rotating shaft 220, and a circular... The circular boss 230 is typically constructed using a combination of a rotating arm 210 and a rotating shaft 220. The rotating shaft is rotatably connected to the center of the discharge box 10, while the rotating arm 210 is connected to the top of the rotating shaft for connection with the drive shaft of the drive mechanism 40. During connection, the drive end of the drive mechanism 40 is connected to the end of the rotating arm 210, so that when the drive end of the drive mechanism 40 extends, it drives the rotating arm 210 to rotate around the rotating shaft 220. The circular boss 230 is sleeved and connected to the rotating shaft 220 for mounting the moving contact unit 310, which then rotates along with the circular boss 230 mounted on the rotating shaft 220.

[0040] It is worth mentioning that, in order to enable the drive mechanism 40 to drive the transmission mechanism 20 of all short-circuit discharge mechanisms to rotate when it extends or retracts, the drive end of the drive mechanism 40 needs to be connected to the ends of the rotating arms 210 of all short-circuit discharge mechanisms, so that all rotating arms 210 can be driven to rotate simultaneously when the drive mechanism 40 extends or retracts. In a preferred embodiment, the drive mechanism 40 includes a cylinder 410 and a transmission rod 420. The cylinder 410 serves as the drive source, and the transmission rod 420 is used to connect with all rotating arms 210. The cylinder 410 is located at the end of the converter valve tower 50 to facilitate installation and connection with all rotating arms 210. The transmission rod 420 extends along the length of the converter valve tower 50 to the location of the short-circuit discharge mechanism at the end. It can be understood that the cylinder 410 can be driven by a power air pump, an air supply pipe, or a control valve.

[0041] Furthermore, the discharge box 10 is filled with insulating gas to form a gas-insulated closed-loop combined short-circuit discharge structure. Compared with the conventional air short-circuit discharge structure, this structure can greatly reduce the volume of the short-circuit discharge device, power transmission system, and power system, thereby reducing equipment costs. At the same time, the gas-insulated closed-loop combined short-circuit discharge structure has a stronger arc-extinguishing capability than the conventional air short-circuit discharge structure, thus improving the electrical life of the contacts inside the short-circuit device. Preferably, the insulating gas can be SF6 gas, or a mixed insulating gas, etc., which can be selected by those skilled in the art according to actual needs.

[0042] In a preferred embodiment of this utility model, the moving contact unit 310 includes a first moving contact 311, the stationary contact unit 320 includes a first stationary contact 321, and the terminal unit 330 includes a first terminal 331 and a connecting terminal 334; wherein, the first stationary contact 321 is fixed to the inner sidewall of the discharge box 10, one end of the first moving contact 311 is fixed to the circular boss 230, and the other end of the first moving contact 311 is cantilevered radially outward from the circular boss 230 for connection with the discharge box 10. The first stationary contact 321 is in contact with the first terminal 331. The first end of the first terminal 331 is connected to the first stationary contact 321. The second end of the first terminal 331 extends out of the discharge box 10 and is configured to connect to the positive terminal of the capacitor 520 located at the bottom of the discharge box 10. The first end of the connection terminal 334 is sleeved on the rotating shaft 220 and abuts against the circular boss 230. The second end of the connection terminal 334 extends out of the discharge box 10 and is configured to connect to the negative terminal of the capacitor 520 located at the bottom of the discharge box 10.

[0043] It should be noted that the first moving contact 311 can be constructed by two vertically opposite contact pieces connected to the upper and lower parts of the circular boss 230 respectively. One end of the moving contact 311 can be installed on the circular boss 230 by bolt connection, which is stable and easy to disassemble and replace. The other end is cantilevered to facilitate contact with the first stationary contact 321. The first terminal 331 is used to connect the first stationary contact 321 and the positive conductor of the capacitor 520 installed at the bottom. The connecting terminal 334 is used to abut against the circular boss 230 to connect synchronously with the negative conductor of the capacitor 520 installed at the bottom. When no short-circuit discharge is performed, this connection structure is disconnected. When the circular boss 230 rotates, the first moving contact 311 rotates with the circular boss 230. When it rotates to contact the first stationary contact 321, a short-circuit discharge between the positive and negative electrodes is achieved.

[0044] In a preferred embodiment of this utility model, the moving contact unit 310 further includes a second moving contact 312 and a third moving contact 313; the stationary contact unit 320 further includes a second stationary contact 322 and a third stationary contact 323; and the terminal unit 330 further includes a second terminal 332 and a third terminal 333. The second stationary contact 322 and the third stationary contact 323 are both fixed to the inner wall of the discharge box 10. One end of the second moving contact 312 and one end of the third moving contact 313 are both fixed to the circular boss 230. The other end of the second moving contact 312 is suspended radially outward from the circular boss 230. The third moving contact 313 is configured to contact the second stationary contact 322. The other end of the third moving contact 313 is radially outward from the circular boss 230 to contact the third stationary contact 323. The first end of the second terminal 332 is connected to the second stationary contact 322. The second end of the second terminal 332 extends out of the discharge box 10 to connect to the positive terminal of the capacitor 520 on the adjacent side. The first end of the third terminal 333 is connected to the third stationary contact 323. The second end of the third terminal 333 extends out of the discharge box 10 to connect to the negative terminal of the capacitor 520 on the adjacent side.

[0045] It is worth noting that the second moving contact 312, the second stationary contact 322, and the second terminal 332 form a group to be connected to the positive terminal of a capacitor 520 on the adjacent side, while the third moving contact 313, the third stationary contact 323, and the third terminal 333 form a group to be connected to the negative terminal of a capacitor 520 on the other adjacent side. Both the second moving contact 312 and the third moving contact 313 are mounted on the circular boss 230, so that when the circular boss 230 rotates, the second moving contact 312 rotates... The first moving contact 311 is positioned close to the second stationary contact 322, the second moving contact 312 is positioned close to the second stationary contact 322, and the third moving contact 313 is positioned close to the third stationary contact 323, thereby achieving short-circuit discharge between the positive and negative terminals of two adjacent capacitors 520. It is worth mentioning that in the discharge box 10, the first moving contact 311 is positioned close to the first stationary contact 321, the second moving contact 312 is positioned close to the second stationary contact 322, and the third moving contact 313 is positioned close to the third stationary contact 323, so as to ensure that the short-circuit between each component is in place and will not cause contact deviation.

[0046] In a preferred embodiment of the present invention, the first stationary contact 321, the second stationary contact 322, and the third stationary contact 323 are arranged at equal intervals along the circumference of the circular boss 230, and the first moving contact 311, the second moving contact 312, and the third moving contact 313 are arranged at equal intervals along the circumference of the circular boss 230.

[0047] It is worth noting that this equidistant arrangement allows the three moving contacts to rotate synchronously to their corresponding stationary contacts when the circular boss 230 rotates, thus completing the short-circuit discharge between the positive and negative terminals of the capacitor 520. Furthermore, a protruding strip 3211 is formed on the end of the first stationary contact 321 near the first moving contact 311. The protruding strip 3211 extends circumferentially along the circular boss 230. This protruding strip 3211 facilitates the first moving contact 311 to preferentially contact the first stationary contact 321, thereby enabling the bottom capacitor 520 to achieve short-circuit discharge in conjunction with the connecting contact. After further rotation, the second moving contact 312 contacts the second stationary contact 322, and the third moving contact 313 contacts the third stationary contact 323, thus enabling all adjacent capacitors 520 to achieve short-circuit discharge between their positive and negative terminals.

[0048] Furthermore, the discharge box 10 includes a housing 110 and a sealing cover 120. The top of the housing 110 is recessed to form four grooves 111. The four grooves 111 are respectively used for the first terminal 331, the second terminal 332, the third terminal 333, and the connecting terminal 334 to extend out. The sealing cover 120 is detachably connected to the top of the housing 110, and the sealing cover 120 has a through hole for the rotating shaft 220 to pass through.

[0049] It should be noted that the housing 110 is used for the internal installation of various components, and the recessed groove 111 formed on its top is used for the four terminals to extend and be installed, while also limiting the terminals to prevent them from moving; the sealing cover 120 is used to seal the housing 110 to prevent leakage of the internal insulating gas, thereby ensuring the effectiveness of the insulating gas; it can be understood that the through hole facilitates the passage of the rotating shaft 220, thereby forming a structure in which the top of the rotating shaft 220 is deep within the sealing cover 120, so that the driving end of the driving mechanism 40 can be connected to the rotating arm 210 at the top of the rotating shaft 220.

[0050] This application also provides a converter valve tower 50, including a valve tower body 510 and multiple layers of capacitor 520 groups arranged vertically at intervals. Each layer of the capacitor 520 group includes multiple capacitors 520 arranged side by side along the length direction of the valve tower body 510. It also includes the insulating gas short-circuit discharge device as described above. Each layer of the capacitor 520 group is correspondingly provided with one insulating gas short-circuit discharge device. The driving mechanism 40 and the short-circuit discharge mechanism of the insulating gas short-circuit discharge device are both connected to the capacitor 520, and the driving mechanism 40 of the insulating gas short-circuit discharge device is disposed at the end of the capacitor 520 group.

[0051] It is understandable that the converter valve tower 50 typically has multiple layers, each with a group of capacitors 520. Thus, each layer needs to be equipped with an insulating gas short-circuit discharge device as described in this application to ensure that each layer of capacitors 520 can have the effect of short-circuit discharge, thereby improving the short-circuit discharge efficiency.

[0052] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An insulating gas short-circuit discharge device, characterized in that, It includes a drive mechanism and multiple short-circuit discharge mechanisms spaced apart along the length of the converter valve tower. Each short-circuit discharge mechanism includes a discharge box, a transmission mechanism, and a discharge component built into the discharge box; wherein... The discharge assembly includes a moving contact unit, a stationary contact unit, and a terminal unit. The transmission mechanism is connected to the center of the discharge box and is rotatably mounted. One end of the moving contact unit is connected to the transmission mechanism, and the other end of the moving contact unit is used to contact the stationary contact unit. The stationary contact unit is fixed in the discharge box. The first end of the terminal unit is internally connected to the discharge box, and the second end of the terminal unit extends out of the discharge box for connection with a capacitor. The discharge box is filled with insulating gas. The discharge box and the drive mechanism are both connected to the capacitor. The drive mechanism is located at the end of the converter valve tower and is spaced apart from the short-circuit discharge mechanism located at the end. The drive end of the drive mechanism is extendable along the length of the converter valve tower and is connected to each of the transmission mechanisms to drive the transmission mechanisms to rotate.

2. The insulating gas short-circuit discharge device according to claim 1, characterized in that, The transmission mechanism includes a rotating arm, a rotating shaft, and a circular boss. The circular boss is sleeved and connected to the rotating shaft. The rotating shaft is vertically connected to the center of the discharge box and is rotatably mounted. The top end of the rotating shaft extends out of the discharge box. The rotating arm is connected to the top end of the rotating shaft. The driving end of the driving mechanism is connected to the end of the rotating arm.

3. The insulating gas short-circuit discharge device according to claim 2, characterized in that, The moving contact unit includes a first moving contact, the stationary contact unit includes a first stationary contact, and the terminal unit includes a first terminal and a connecting terminal; wherein... The first stationary contact is fixed to the inner wall of the discharge box. One end of the first moving contact is fixed to the circular protrusion. The other end of the first moving contact is cantilevered radially outward from the circular protrusion to contact the first stationary contact. The first end of the first terminal is connected to the first stationary contact. The second end of the first terminal extends out of the discharge box to connect to the positive terminal of the capacitor located at the bottom of the discharge box. The first end of the connecting terminal is sleeved on the rotating shaft and abuts against the circular protrusion. The second end of the connecting terminal extends out of the discharge box to connect to the negative terminal of the capacitor located at the bottom of the discharge box.

4. The insulating gas short-circuit discharge device according to claim 3, characterized in that, The moving contact unit further includes a second moving contact and a third moving contact; the stationary contact unit further includes a second stationary contact and a third stationary contact; and the terminal unit further includes a second terminal and a third terminal. The second stationary contact and the third stationary contact are both fixed to the inner wall of the discharge box. One end of the second moving contact and one end of the third moving contact are both fixed to the circular protrusion. The other end of the second moving contact is cantilevered radially outward from the circular protrusion to contact the second stationary contact. The other end of the third moving contact is cantilevered radially outward from the circular protrusion to contact the third stationary contact. The first end of the second terminal is connected to the second stationary contact. The second end of the second terminal extends out of the discharge box to connect to the positive terminal of the capacitor on the adjacent side. The first end of the third terminal is connected to the third stationary contact. The second end of the third terminal extends out of the discharge box to connect to the negative terminal of the capacitor on the adjacent side.

5. The insulating gas short-circuit discharge device according to claim 4, characterized in that, The first stationary contact, the second stationary contact, and the third stationary contact are arranged at equal intervals along the circumference of the circular boss, and the first moving contact, the second moving contact, and the third moving contact are arranged at equal intervals along the circumference of the circular boss.

6. The insulating gas short-circuit discharge device according to claim 5, characterized in that, The first stationary contact has a protruding ridge at one end near the first moving contact, and the ridge extends circumferentially along the circular boss.

7. The insulating gas short-circuit discharge device according to claim 2, characterized in that, The drive mechanism includes a cylinder and a transmission rod. The cylinder is disposed at the end of the converter valve tower and spaced apart from the short-circuit discharge mechanism located at the end. The drive end of the cylinder is telescopically disposed along the length direction of the converter valve tower and fixedly connected to one end of the transmission rod. The transmission rod extends along the length direction of the converter valve tower and is respectively connected to the rotating arm of each of the transmission mechanisms.

8. The insulating gas short-circuit discharge device according to claim 4, characterized in that, The discharge box includes a housing and a sealing cover. The top of the housing has four recesses, which are respectively used for the first terminal, the second terminal, the third terminal and the connecting terminal to extend out. The sealing cover is detachably connected to the top of the housing and has a through hole for the rotating shaft to pass through.

9. The insulating gas short-circuit discharge device according to claim 1, characterized in that, The insulating gas is SF6 gas.

10. A converter valve tower, comprising a valve tower body and multiple layers of capacitor banks arranged at vertical intervals, each layer of the capacitor bank comprising multiple capacitors arranged side-by-side along the length of the valve tower body, characterized in that, It also includes the insulating gas short-circuit discharge device as described in any one of claims 1-9, wherein each layer of the capacitor bank is provided with one of the insulating gas short-circuit discharge devices, the driving mechanism and the short-circuit discharge mechanism of the insulating gas short-circuit discharge device are both connected to the capacitor, and the driving mechanism of the insulating gas short-circuit discharge device is provided at the end of the capacitor bank.

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