Converter station valve hall foldable fireproof and explosion-proof sealing system

Abstract

This invention belongs to the field of converter station protection technology, specifically relating to a folded fireproof and explosion-proof sealing system for the valve hall of a converter station. The system includes a fireproof and explosion-proof component, a sleeve mounting hole, and a power component. The outer side of the fireproof and explosion-proof component is used for sealing connection with the through-wall hole of the valve hall firewall. The sleeve mounting hole is located on the fireproof and explosion-proof component and extends through both sides of the component. Fixed fireproof and explosion-proof components are located on both sides of the sleeve mounting hole. The power component is fixedly connected to the valve hall firewall and movably connected to the folded fireproof and explosion-proof component, used to change the distance between the folded fireproof and explosion-proof component and the fixed fireproof and explosion-proof component. This invention can significantly shorten the disassembly and installation cycle of the sealing system during later maintenance while ensuring the effectiveness of the converter station valve hall sleeve fireproof sealing system, reducing the high maintenance costs caused by the numerous types of materials and complex construction and installation of existing solutions.

Description

Technical Field

[0001] This invention belongs to the field of converter station protection technology, and relates to converter station valve hall side sleeve sealing technology, specifically to a converter station valve hall folded fireproof and explosion-proof sealing system. Background Technology

[0002] Converter stations are the most important nodes in DC transmission lines, and ensuring their safe and stable operation is crucial for DC power transmission. Converter valves and converter transformers are the most critical equipment within these stations. In particular, the converter transformer is one of the core main equipment components of a DC transmission project, playing a vital role in providing commutation voltage to the converter bridge, transmitting electrical energy, and isolating AC / DC systems. The converter valves in the valve hall are the basic unit equipment of the converter, undertaking AC / DC conversion functions within the converter station, and are essential equipment in high-voltage DC transmission projects. The valve hall, being an enclosed building housing the converter valves, requires excellent electromagnetic shielding performance to shield against external electromagnetic interference and external radio interference generated by valve commutation. Typically, converter transformers and valve halls are arranged adjacent to each other, and the converter transformer bushings need to penetrate firewalls into the valve hall. However, converter transformers themselves pose a very high fire hazard, and fires in converter transformers are often accompanied by explosions, creating a significant safety hazard to the converter valves inside the valve hall. Therefore, fireproofing the portion of the converter transformer bushings that penetrates the valve hall is crucial.

[0003] While some existing fireproof and explosion-proof sealing solutions can address the issue of effective fireproofing of converter transformer bushings in the event of a fire, these solutions involve a wide variety of materials (e.g., multi-layer fireproof boards combined with fireproof cotton, requiring dense stainless steel framing), complex construction processes, and long installation cycles. Furthermore, during subsequent maintenance and repair of the converter transformer bushings, the entire opening sealing system must be dismantled to push the bushings outwards from the converter station valve hall. The sealing system must be restored to its original state after maintenance and bushing repositioning. Given the short and urgent maintenance schedule of converter stations, the dismantling and installation of the sealing system designed according to existing solutions is time-consuming. This results in high costs for both newly built converter stations and the fireproofing renovation of valve halls in existing stations, highlighting the need for improved economic efficiency during project implementation. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a foldable fireproof and explosion-proof sealing system for converter station valve halls.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] Provides a foldable fireproof and explosion-proof sealing system for converter station valve halls, including:

[0007] Fireproof and explosion-proof components, sleeve mounting holes, power components;

[0008] The outer side of the fireproof and explosion-proof component is used for sealing connection with the through hole of the valve hall firewall, and the sleeve mounting hole is located on the fireproof and explosion-proof component and penetrates both sides of the fireproof and explosion-proof component.

[0009] The fireproof and explosion-proof assembly includes a fixed fireproof and explosion-proof assembly and a folding fireproof and explosion-proof assembly, which are located on both sides of the sleeve mounting hole, respectively.

[0010] The power component is fixedly connected to the valve hall firewall and movably connected to the folding fireproof and explosion-proof component. The power component is used to change the distance between the folding fireproof and explosion-proof component and the fixed fireproof and explosion-proof component.

[0011] Preferably, the side of the fireproof and explosion-proof component facing the outside is a fiber explosion-proof board, and the side of the fireproof and explosion-proof component facing the inside is a fireproof and heat-insulating felt. The fiber explosion-proof board and the fireproof and heat-insulating felt are combined to form a fixed fireproof and explosion-proof component.

[0012] Preferably, the folding fireproof and explosion-proof component has multiple sequentially arranged folding blocks, with adjacent folding blocks hinged together, and the folding fireproof and explosion-proof component has two states: folded and unfolded; satisfying the following conditions.

[0013] When the folding fireproof and explosion-proof component is in the non-folded state, the folding blocks are arranged side by side and coincide with the plane where the fixed fireproof and explosion-proof component is located. The folding fireproof and explosion-proof component and the fixed fireproof and explosion-proof component abut against each other. When the folding fireproof and explosion-proof component is in the folded state, the folding blocks are deflected relative to the plane where the fixed fireproof and explosion-proof component is located. The maximum distance between the folding fireproof and explosion-proof component and the fixed fireproof and explosion-proof component is greater than the wall size of the sleeve installation hole.

[0014] Preferably, it has a sliding track, and adjacent folding blocks are hinged by pins. The pins have limiting pins and non-limiting pins. The limiting pins are fixedly connected to the limiting member. The limiting member is used in conjunction with the sliding track so that the limiting pins can only slide within the sliding track, while the non-limiting pins can move outside the sliding track.

[0015] Preferably, the sliding track is located on the edge of the through-hole in the valve hall firewall.

[0016] Preferably, the fireproof and explosion-proof component has a stainless steel frame, and the sliding rail is located on the stainless steel frame.

[0017] Preferably, there are n folding blocks, and the folding block closest to the power component / sleeve mounting hole is the first folding block / nth folding block. The first folding block is hinged to the valve hall firewall by a pin, and the side of the nth folding block closest to the sleeve mounting hole can only slide within the sliding track by a limiting pin.

[0018] The nth folding block and the fixed fireproof and explosion-proof component can form a sleeve mounting hole. The nth folding block is connected to the power component through a connector, where n is an even number.

[0019] Preferably, it has two sleeve mounting holes distributed vertically, with the fixed fireproof and explosion-proof component located on the left / right side of the sleeve mounting hole, and the folding fireproof and explosion-proof component located on the right / left side of the sleeve mounting hole.

[0020] Preferably, it has two sleeve mounting holes distributed about left and right, with the fixed fireproof and explosion-proof component located above / below the sleeve mounting hole, and the folding fireproof and explosion-proof component located below / above the sleeve mounting hole.

[0021] Preferably, when viewed from the cross-sectional direction of the folded block, the hinge positions on both sides of the folded block are located on the diagonal of the rectangle.

[0022] The beneficial effects of this invention are reflected in providing a foldable fireproof and explosion-proof sealing system for converter station valve halls. This application uses a power component to change the distance between the foldable fireproof and explosion-proof components and the fixed fireproof and explosion-proof components. During later maintenance and repair phases, this distance can be adjusted using the power component, allowing for movement space on one side of the bushing mounting hole. This enables rapid movement and retraction of the bushing, allowing it to move outwards for maintenance work. When maintenance is complete, the bushing is returned to its original position, and the distance between the foldable and fixed fireproof and explosion-proof components is adjusted again using the power component to quickly restore the fireproof sealing system to its original position. This application can significantly shorten the disassembly and installation cycle of the sealing system during later maintenance while ensuring the effectiveness of the fireproof sealing system for converter station valve hall bushings, reducing the high maintenance costs associated with existing solutions due to the variety of materials used and complex construction and installation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the present invention in a folded state;

[0024] Figure 2 This is a schematic diagram of an embodiment of the present invention in its non-folded state;

[0025] Figure 3 A schematic diagram of one embodiment of the present invention showing the folded state of the converter transformer bushing;

[0026] Figure 4 A schematic diagram of an embodiment of the present invention showing the converter transformer bushing in a non-folded state;

[0027] Figure 5 A schematic diagram of one embodiment of the present invention, showing a stainless steel frame for installing converter transformer bushings;

[0028] Figure 6This is a side view of one embodiment of the present invention with a converter transformer bushing installed.

[0029] Explanation of reference numerals in the attached figures

[0030] 1. Bushing mounting hole; 2. Folding fireproof and explosion-proof component; 3. Fixed fireproof and explosion-proof component; 4. Indoor; 5. Outdoor; 6. Valve hall firewall; 11. Converter transformer bushing; 21. Folding block; 22. Sliding rail; 23. Stainless steel frame; Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-6 As shown, the specific embodiments provided by the present invention are as follows:

[0033] Example 1:

[0034] The converter station valve hall folded fireproof and explosion-proof sealing system includes:

[0035] Fireproof and explosion-proof components, sleeve mounting hole 1, power components;

[0036] The outer side of the fireproof and explosion-proof component is used for sealing connection with the through hole of the valve hall firewall 6, and the sleeve mounting hole 1 is located on the fireproof and explosion-proof component and penetrates both sides of the fireproof and explosion-proof component.

[0037] The fireproof and explosion-proof assembly has a fixed fireproof and explosion-proof assembly 3 and a folded fireproof and explosion-proof assembly 2, which are located on both sides of the sleeve mounting hole 1, respectively.

[0038] The power component is fixedly connected to the valve hall firewall 6 and movably connected to the folding fireproof and explosion-proof component 2. The power component is used to change the distance between the folding fireproof and explosion-proof component 2 and the fixed fireproof and explosion-proof component.

[0039] The fireproof and explosion-proof component has a fiber explosion-proof board on the outdoor side (5) and a fireproof and heat-insulating felt on the indoor side (4). The fiber explosion-proof board is a fire-resistant and explosion-proof material made of reinforced fiber cement board with a pressurized galvanized steel surface. It is mainly used in various systems such as explosion-proof partitions, explosion-proof ceilings, explosion-proof smoke exhaust ducts, cable pipes, explosion-proof cable protection, explosion-proof doors, and explosion-proof protection for steel structures. The fireproof and heat-insulating felt is made of non-combustible special fibers through fine processing. It does not burn or shrink when exposed to fire and has excellent high-temperature resistance and heat insulation properties. The fiber explosion-proof board and the high-performance fireproof and heat-insulating felt are combined to form a fixed fireproof and explosion-proof component, which can make the sealing system have the effect of fireproof and explosion-proof sealing.

[0040] Ultra-high voltage direct current (UHVDC) transmission projects are among the key power transmission channels. To ensure the normal operation of these projects, the maintenance of converter stations is of paramount importance in power work, and this maintenance work is extremely complex and demanding. Converter station maintenance requires power outages, which have a significant impact on related systems and departments, necessitating very short maintenance periods. This is especially true for large-scale high-voltage converter stations, where some valve halls cover thousands of square meters, requiring enormous human and material resources to complete maintenance within a short timeframe. Some existing fireproof and explosion-proof sealing systems can solve the problem of effective fireproof sealing to a certain extent, but they use a variety of materials (such as using multi-layer fireproof boards and fireproof cotton in combination, requiring dense stainless steel keel installation, etc.), have complex construction processes, and have long installation cycles. In addition, during the later operation and maintenance of the converter transformer bushing, the entire opening sealing system needs to be removed, and it takes more than ten days to restore the sealing system to its original state after the maintenance is completed and the bushing is returned to its original position. The maintenance time of the converter station is short and urgent, and the disassembly and installation period of the sealing system designed in the current scheme is very long. Whether it is a newly built converter station or the valve hall fireproof sealing renovation of the existing converter station, the cost is very high, and the economic efficiency needs to be improved in the process of project implementation.

[0041] In this embodiment, the outer side of the fireproof and explosion-proof component is sealed to the through-wall hole of the valve hall firewall 6. The converter transformer bushing passes through the bushing 11 mounting hole and is sealed to the fireproof and explosion-proof component. The fixed fireproof and explosion-proof component 3 and the fixed fireproof and explosion-proof component 2 are located on both sides of the bushing mounting hole. The fixed fireproof and explosion-proof component does not move, but it can move under the action of the power component. Specifically, the power component can provide power F to the fixed fireproof and explosion-proof component, which can move the fixed fireproof and explosion-proof component away from or towards the fixed fireproof and explosion-proof component, thereby changing the surrounding space of the converter transformer bushing. In an optional embodiment, the power component can be a motor, hydraulic cylinder, etc., which is not specifically limited here.

[0042] In this embodiment, the present application uses a power component to change the distance between the folded fireproof and explosion-proof component and the fixed fireproof and explosion-proof component. During later maintenance and repair phases, the power component can increase this distance, allowing for movement on one side of the bushing mounting hole. This enables rapid movement and retraction of the bushing, moving it outwards from the valve hall for maintenance. Once maintenance is complete, the bushing is returned to its original position, and the power component is used to decrease the distance between the folded and fixed fireproof and explosion-proof components, quickly restoring the fireproof sealing system to its original position. This application ensures the effectiveness of the fireproof sealing system for the converter station valve hall bushing while significantly shortening the disassembly and installation cycle during later maintenance, reducing the high maintenance costs associated with existing solutions due to the variety of materials used and complex installation.

[0043] Example 2:

[0044] The folding fireproof and explosion-proof component 2 has multiple sequentially arranged folding blocks 21, with adjacent folding blocks 21 hinged together. The folding fireproof and explosion-proof component 2 has two states: folded and unfolded; satisfying the following conditions:

[0045] When the folding fireproof and explosion-proof component 2 is in the non-folded state, the folding blocks 21 are arranged side by side and coincide with the plane where the fixed fireproof and explosion-proof component 3 is located. The folding fireproof and explosion-proof component 2 and the fixed fireproof and explosion-proof component 3 are in contact. When the folding fireproof and explosion-proof component 2 is in the folded state, the folding blocks 21 are deflected relative to the plane where the fixed fireproof and explosion-proof component 3 is located. The maximum distance between the folding fireproof and explosion-proof component 2 and the fixed fireproof and explosion-proof component 3 is greater than the wall size of the bushing mounting hole 1. The wall size is the radial dimension of the converter transformer bushing 11 on the plane where the valve hall firewall 6 is located.

[0046] The folding fireproof and explosion-proof component 2 has a sliding track 22. Adjacent folding blocks 21 are hinged by pins. The pins have a limiting pin and a non-limiting pin. The limiting pin is fixedly connected to a limiting member. The limiting member is used in conjunction with the sliding track 22 so that the limiting pin can only slide within the sliding track 22, while the non-limiting pin can move outside the sliding track 22.

[0047] In this embodiment, when the fireproof and explosion-proof sealing system is working normally, the folding fireproof and explosion-proof components are in an open state. The folding blocks are arranged side by side and coincide with the plane of the fixed fireproof and explosion-proof components. At this time, the folding fireproof and explosion-proof components abut against the fixed fireproof and explosion-proof components, and the bushing mounting hole between them can be sealed to the converter transformer bushing, thus achieving the effect of fireproof and explosion-proof sealing. When the converter station needs to be maintained, the folding fireproof and explosion-proof components are moved by the power component, moving away from the fixed fireproof and explosion-proof components. For this purpose, one side of the converter transformer bushing has room to move, which can realize the rapid movement of the bushing. This saves a lot of manpower and time in the disassembly and installation of the sealing system, improves the efficiency of converter station maintenance, and reduces maintenance costs.

[0048] Specifically, adjacent folding blocks are hinged by pins, and the limiting pins can only slide within the sliding track. This allows the folding fireproof and explosion-proof components to shift on the side closest to the fixed fireproof and explosion-proof components without completely disengaging from the sliding track. This provides space for the installation and disassembly of converter transformer bushings, facilitating quick installation and disassembly of converter transformer bushings and improving maintenance efficiency.

[0049] Example 3:

[0050] The sliding track 22 is located on the edge of the through hole of the valve hall firewall 6.

[0051] The fireproof and explosion-proof component has a stainless steel frame 23, and a sliding track 22 is located on the stainless steel frame 23.

[0052] In one embodiment, the sliding track 22 is located on the edge of the through hole of the valve hall firewall 6, and the non-limiting pin can move on the sliding track 22, which can realize the retraction of the folding block 21 and make the folding block 21 resistant to impact.

[0053] When the lateral spacing of the openings in the fireproof wall of the valve hall is small, the lateral span of the fireproof and explosion-proof components is relatively small. At this time, installing the sliding rail on the walls on both sides of the opening has a certain impact resistance. However, when the lateral spacing of the openings in the fireproof wall of the valve hall is large, the folding block is prone to deformation under a large impact.

[0054] Therefore, in this embodiment, the fireproof and explosion-proof component has a stainless steel frame, and the sliding rail is located on the stainless steel frame. The stainless steel frame has multiple frames in the same direction, such as a grid-like stainless steel frame. The sliding rail can be set on multiple supports, so that the fireproof and explosion-proof component can be connected to the sliding rail at multiple positions in the same direction. Since the outer edge of the stainless steel frame is fixedly connected to the fireproof and explosion-proof wall of the valve hall, the lateral span of the fireproof and explosion-proof component is reduced, and the deformation of the fireproof and explosion-proof component under the external explosion impact is reduced.

[0055] Example 4:

[0056] It has n folding blocks 21. The folding block 21 closest to the power component / sleeve mounting hole 1 is the first folding block 21 / nth folding block 21. The first folding block 21 is hinged to the valve hall firewall 6 by a pin. The side of the nth folding block 21 closest to the sleeve mounting hole 1 is used in conjunction with the sliding rail 22 by a limiting pin.

[0057] The nth folding block 21 and the fixed fireproof and explosion-proof component can form a sleeve mounting hole 1. The nth folding block 21 is connected to the power component through a connector, where n is an even number.

[0058] In this embodiment, the first folding block is hinged to the valve hall firewall via a pin, and the side of the nth folding block near the sleeve mounting hole is engaged with the sliding rail via a limiting pin, so that the limiting pin on the side of the nth folding block near the sleeve mounting hole can only slide within the sliding rail; this ensures that both sides of the folding fireproof and explosion-proof component in the telescopic direction are always on the plane where the firewall is fixedly connected. The telescopic direction is the direction in which the folding fireproof and explosion-proof component moves away from or closer to the fixed fireproof and explosion-proof component on the surface where the valve hall firewall is located, which facilitates alignment with the sleeve mounting hole during installation, allowing for automatic alignment of the sleeve mounting hole during installation and improving installation efficiency.

[0059] Example 5:

[0060] It has two sleeve mounting holes distributed vertically. The fixed fireproof and explosion-proof component is located on the left / right side of the sleeve mounting hole, and the folding fireproof and explosion-proof component is located on the right / left side of the sleeve mounting hole.

[0061] It has two sleeve mounting holes distributed on the left and right. The fixed fireproof and explosion-proof component is located on the upper / lower side of the sleeve mounting hole, and the folding fireproof and explosion-proof component is located on the lower / upper side of the sleeve mounting hole.

[0062] In one embodiment, there are two bushing mounting holes distributed vertically for inserting two converter transformer bushings distributed vertically. The fixed fireproof and explosion-proof component and the folding fireproof and explosion-proof component are located on the left and right sides of the bushing mounting holes, respectively. The folding fireproof and explosion-proof component can be located on the left or right side of the converter transformer bushing, which is not specifically limited here.

[0063] In another embodiment, there are two bushing mounting holes distributed on the left and right for inserting two converter transformer bushings distributed on the left and right. The fixed fireproof and explosion-proof component and the folding fireproof and explosion-proof component are located on the upper and lower sides of the bushing mounting holes, respectively. The folding fireproof and explosion-proof component can be located on the upper or lower side of the converter transformer bushing.

[0064] Preferably, the two bushing mounting holes are distributed on the left and right sides, and the foldable fireproof and explosion-proof component can be located on the upper side of the converter transformer bushing, which facilitates the installation and disassembly of the converter transformer bushing.

[0065] Example 6:

[0066] Viewed from the cross-sectional direction of the folded block, the hinge positions on both sides of the folded block 21 are located on the diagonal of the rectangle.

[0067] In this embodiment, the hinge positions on both sides of the folding block are located on the diagonal of the rectangle. That is, the A end of the first folding block is hinged to the A end of the second folding block, the B end of the second folding block is hinged to the B end of the third folding block, the A end of the third folding block is hinged to the A end of the fourth folding block, and so on. This allows for the interleaved distribution of limiting pins and non-limiting pins. In other words, the previous hinge position is limited to movement within the sliding track, while the next hinge position can move outside the sliding track. This enables the folding fireproof and explosion-proof component to fold while maximizing the number of limiting pins used in conjunction with the sliding track, allowing the folding fireproof and explosion-proof component to withstand greater impacts.

[0068] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inner", "outer", "inner side", "outer side", etc. indicate the orientation or positional relationship.

[0069] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0070] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0071] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0072] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A folding fire and explosion resistant plugging system for a valve hall of a converter station, characterized in that, Comprising, The fireproof anti-explosion assembly is connected with the through-wall hole of the valve hall fireproof wall, and the sleeve mounting hole is located on the fireproof anti-explosion assembly and penetrates through both sides of the fireproof anti-explosion assembly. The fireproof anti-explosion assembly has a fixed fireproof anti-explosion assembly and a folding fireproof anti-explosion assembly, and the fixed fireproof anti-explosion assembly and the fixed fireproof anti-explosion assembly are located on both sides of the sleeve mounting hole. The power assembly is fixedly connected with the valve hall fireproof wall, is movably connected with the folding fireproof anti-explosion assembly, and is used to change the distance between the folding fireproof anti-explosion assembly and the fixed fireproof anti-explosion assembly. The folding fireproof anti-explosion assembly has a plurality of folding blocks arranged in sequence, and adjacent two folding blocks are hingedly connected. When the folding fireproof anti-explosion assembly is in the unfolded state, the folding blocks are arranged side by side and coincide with the plane where the fixed fireproof anti-explosion assembly is located, the folding fireproof anti-explosion assembly abuts against the fixed fireproof anti-explosion assembly, when the folding fireproof anti-explosion assembly is in the folded state, the folding blocks are deflected relative to the plane where the fixed fireproof anti-explosion assembly is located, and the maximum distance between the folding fireproof anti-explosion assembly and the fixed fireproof anti-explosion assembly is greater than the wall surface size of the sleeve mounting hole.

2. The folding fireproof anti-explosion plugging system for the valve hall of the converter station according to claim 1, wherein The side of the fireproof anti-explosion assembly facing the outdoor is a fiber anti-explosion plate, and the side of the fireproof anti-explosion assembly facing the indoor is a fireproof heat insulation felt.

3. The folding fireproof anti-explosion plugging system for the valve hall of the converter station according to claim 2, wherein The sliding track is located on the edge of the through-wall hole of the valve hall fireproof wall.

5. The folding fireproof anti-explosion plugging system for the valve hall of the converter station according to claim 4, wherein The fireproof anti-explosion assembly has a stainless steel frame, and the sliding track is located on the stainless steel frame.

6. The folding fireproof anti-explosion plugging system for the valve hall of the converter station according to claim 5, wherein There are n folding blocks, the folding block closest to the power assembly / sleeve mounting hole is the first folding block / the nth folding block, the first folding block is hingedly connected with the valve hall fireproof wall through a pin shaft, and the side of the nth folding block close to the sleeve mounting hole is used in cooperation with the sliding track through a limiting pin shaft; The nth folding block and the fixed fireproof anti-explosion assembly can form the sleeve mounting hole, the nth folding block is connected with the power assembly through a connecting piece, and n is an even number.

7. The folding fireproof anti-explosion plugging system for the valve hall of the converter station according to claim 6, wherein ​ ​ ​ The fixed fireproof and explosion-proof assembly is located on the left / right side of the sleeve mounting hole, and the folding fireproof and explosion-proof assembly is located on the right / left side of the sleeve mounting hole. 8.The folding fireproof and explosion-proof plugging system for valve hall of converter station according to claim 6, characterized in that, The fixed fireproof and explosion-proof assembly is located on the left / right side of the sleeve mounting hole, and the folding fireproof and explosion-proof assembly is located on the right / left side of the sleeve mounting hole. 9.The folding fireproof and explosion-proof plugging system for valve hall of converter station according to claim 7 or 8, characterized in that, From the cross-sectional direction of the folding block, the hinge positions on both sides of the folding block are located on the diagonal lines of the rectangle.

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