A valve tower for a converter valve

Abstract

The present invention relates to a converter valve tower, which is a vertical structure, including at least two upper and lower stacked valve layers and a pressure equalizing ring arranged above the uppermost valve layer, and a water leakage detection mechanism arranged below the lowermost valve layer, each valve layer includes two valve modules arranged in parallel, and a maintenance platform that can be disassembled and translated is arranged between the valve modules on the same layer, the valve modules on the same layer are electrically connected by a pipe mother, the adjacent valve layers are electrically connected by a cross-layer pipe mother, and the two ends of the adjacent valve layers are connected by a diagonal insulator, and at least two cooling water pipelines are arranged in the valve modules on the same column. The valve tower of the present invention adopts a vertical structure, and the valve modules on the same layer and the valve modules on the adjacent valve layers are connected by a pipe mother, the structure is compact, the floor space of the valve tower is effectively reduced, the installation of the valve body is convenient, and its stability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of direct current transmission converter valves, and in particular relates to a converter valve tower. Background Art

[0002] With the economic growth and the continuous improvement of people's living standards, my country's demand for electric energy is getting higher and higher. It has become necessary to vigorously research and develop DC transmission technology. At present, thyristor commutator valves are commonly used in DC transmission technology, and valve towers are generally suspended or vertical structures. The suspended valve tower adopts a flexible connection method as a whole, mainly for the suspension insulator and the rotary hinge connection. There is a relative shaking phenomenon between the valve layers, and because the suspension insulator can only withstand longitudinal tension and cannot withstand shear force, there is a horizontal degree of freedom, so the overall operation stability and seismic resistance of the valve tower are reduced. When the vertical structure commutator valve tower is used in high-power high-voltage DC transmission, the size of the overall valve tower assembly needs to be greatly increased due to electrical insulation requirements, but due to the overall size of the valve hall, there are many design difficulties such as the need to reduce the size of the valve tower structure and enhance seismic stability. The valve tower has greatly increased the requirements for the valve hall structure of the commutator valve, and it is also inconvenient to install and implement on site. At the same time, this type of valve tower needs to take overall shielding measures for different valve layers, which will affect the heat dissipation effect of the valve tower to a certain extent. In the design, it is extremely difficult to meet the electrical performance, mechanical performance, etc. at the same time.

[0003] In addition, there are many components in the converter valve tower, and the convenience of later operation, maintenance and overhaul needs to be considered during the design process. Due to the compact structural design of the vertical converter valve tower, it brings many inconveniences to the installation and maintenance work. At present, there are two main ways to overhaul the converter valve tower: one is to operate directly on the lifting vehicle without an overhaul platform inside the valve tower. This method can only overhaul the peripheral equipment of the valve tower. If the internal components of the valve tower fail, it is difficult to maintain; the other way is to set up an overhaul platform inside the valve tower. In order to meet the insulation requirements, the overhaul platform must be wide enough, which will inevitably increase the floor space of the valve tower and increase the construction cost of the valve hall. Summary of the invention

[0004] The object of the present invention is to provide a converter valve tower to solve the problem that the converter valve tower occupies a large space and has poor stability.

[0005] A converter valve tower of the present invention is realized as follows:

[0006] A converter valve tower is a vertical structure, comprising at least two upper and lower stacked valve layers, a pressure equalizing ring arranged above the uppermost valve layer, and a water leakage detection mechanism arranged below the lowermost valve layer, each valve layer comprising two valve modules arranged in parallel, and a disassembly and translational maintenance platform is arranged between the valve modules on the same layer, the valve modules on the same layer are electrically connected by a pipe mother, the adjacent valve layers are electrically connected by a cross-layer pipe mother, and the two ends of the adjacent valve layers are connected by a diagonal insulator, and at least two cooling water pipelines are arranged in the valve modules on the same column.

[0007] Furthermore, the valve module I and the valve module II located on the same layer are connected in series diagonally through a Z-shaped pipe mother;

[0008] The valve module I of the upper valve layer is diagonally connected in series with the valve module II of the lower valve layer through a Z-shaped cross-layer pipe mother.

[0009] Furthermore, one end of the tube mother and the cross-layer tube mother is rigidly connected, and the other end is flexibly connected.

[0010] Furthermore, the oblique insulators between the two ends of the adjacent valve layers are arranged in parallel in the vertical projection direction.

[0011] Further, the valve module is installed on a frame, the frame includes an inner longitudinal beam and an outer longitudinal beam, and at least two cross beams arranged between the inner longitudinal beam and the outer longitudinal beam, and the valve module is installed between the two cross beams;

[0012] The frames between adjacent valve layers are connected by supporting insulators.

[0013] Furthermore, the inspection platform is installed on the inner longitudinal beams of two valve modules on the same layer, and can move in the length direction of the inner longitudinal beams.

[0014] Furthermore, the cooling water pipeline is a spiral structure, and an exhaust valve is provided on the top of one of the cooling water pipelines of the valve modules in the same column.

[0015] Furthermore, the pressure-equalizing ring adopts a split structure, and each pressure-equalizing ring is set at the same electrical potential as the high-potential end of the valve module below it.

[0016] Furthermore, an independent water leakage detection mechanism is respectively arranged below the two valve modules located at the bottom layer.

[0017] Furthermore, at least two S-shaped optical cable grooves are arranged inside each row of valve modules.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects:

[0019] (1) The valve modules on the same layer of the present invention are connected by a tube mother, which effectively reduces the lateral size of the valve layer, reduces the floor space of the valve tower, and facilitates the installation of the valve layer;

[0020] (2) A detachable and movable maintenance platform is set between valve modules on the same layer, which improves the efficiency and safety of maintenance and further reduces the distance between valve modules on the same layer;

[0021] (3) Adjacent valve layers are connected by cross-layer pipe mothers and inclined insulators, thereby increasing the overall seismic resistance and stability of the valve tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is a structural diagram of a converter valve tower according to a preferred embodiment of the present invention;

[0024] Figure 2 hour Figure 1 A magnified view of part A;

[0025] Figure 3 yes Figure 1 A magnified view of part B;

[0026] Figure 4 2 is a front view of a converter valve tower according to a preferred embodiment of the present invention;

[0027] Figure 5 It is a right side view of a converter valve tower according to a preferred embodiment of the present invention;

[0028] Figure 6 This is a structural diagram of a converter valve tower in a preferred embodiment of the present invention when a valve module is not installed on one of the valve layers;

[0029] In the figure: valve layer 1, equalizing ring 2, water leakage detection mechanism 3, maintenance platform 4, pipe mother 5, cross-layer pipe mother 6, inclined insulator 7, cooling water pipeline 8, inlet and outlet pipe mother 9, frame 10, inner longitudinal beam 11, outer longitudinal beam 12, cross beam 13, valve layer shielding cover 14, supporting insulator 15, base 16, exhaust valve 17, water pipe joint 18, water receiving tray 19, water leakage detection device 20, optical cable trough 21, lightning arrester 22, aluminum alloy pipe mother plate 23, support seat 24, and suspension rod 25. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0032] like Figure 1-6 As shown, a converter valve tower is a vertical structure, which includes at least two upper and lower stacked valve layers 1 and a pressure equalizing ring 2 arranged above the uppermost valve layer 1, and a water leakage detection mechanism 3 arranged below the lowermost valve layer 2, each valve layer 1 includes two valve modules arranged in parallel, and a detachable and translatable maintenance platform 4 is arranged between the valve modules on the same layer, the valve modules on the same layer are electrically connected by a pipe mother 5, the adjacent valve layers 1 are electrically connected by a cross-layer pipe mother 6, and the two ends of the adjacent valve layers 1 are connected by a diagonal insulator 7, and at least two cooling water pipelines 8 are arranged in the valve modules on the same column.

[0033] In order to reduce the space gap between the valve modules on the same layer, the valve module I and the valve module II on the same layer are diagonally connected in series through a Z-shaped pipe mother 5 .

[0034] The two valve modules on the same layer are electrically connected through the pipe mother 5, so that the diagonals of the two valve modules on the same layer form equal potentials, and the two valve modules are connected in series, thereby reducing the lateral size of the valve layer 1. In addition, the two valve modules are completely independent in terms of machinery, without rigid connection, and the two valve modules are decoupled, which increases the convenience of installation and has good stability.

[0035] In order to reduce the distance between adjacent valve layers 1 , the valve module I of the upper valve layer 1 is diagonally connected in series with the valve module II of the lower valve layer 1 through a Z-shaped cross-layer pipe mother 6 .

[0036] Electrically, valve module I of the upper valve layer 1 is diagonally connected to valve module II of the lower valve layer 1 to form a fixed potential, thereby realizing the series connection of the valve modules of the two valve layers 1. Moreover, through the connection of the Z-shaped cross-layer pipe mother 6, the valve tower structure is compact and has strong integrity, which facilitates modular production, transportation and on-site assembly construction.

[0037] In order to form a pipe mother circulation loop of the entire valve tower, an inlet and outlet pipe mother 9 is arranged on the side of one row of valve modules for voltage input and output.

[0038] Preferably, in order to protect the valve tower from damage caused by electrical stress shock, a stacked lightning arrester 22 is provided on one side of the valve tower, and the inlet and outlet pipe mothers of the valve modules of each valve layer are connected in parallel to the upper and lower ends of the lightning arrester 22 through aluminum alloy pipe mother plates 23, thereby protecting the valve group.

[0039] In order to increase the anti-seismic performance of the entire valve tower, one end of the pipe mother 5 and the cross-layer pipe mother 6 is rigidly connected, and the other end is flexibly connected.

[0040] Preferably, the rigid connection uses a rectangular busbar connection, and the flexible connection uses a telescopic fitting connection.

[0041] In order to further ensure the stability between adjacent valve layers 4 and improve the anti-seismic performance of the valve tower, the inclined insulators 7 between the two ends of adjacent valve layers 4 are arranged in parallel.

[0042] The parallel arrangement of the inclined insulators 7 at both ends of the valve layer can improve the torsion resistance of the valve layer component and provide higher stability.

[0043] In order to facilitate fixing and supporting the valve module, the valve module is installed on a frame 10 . The frame 10 includes an inner longitudinal beam 11 and an outer longitudinal beam 12 , and at least two cross beams 13 arranged between the inner longitudinal beam 11 and the outer longitudinal beam 12 . The valve module is installed between the two cross beams 13 .

[0044] The inner longitudinal beams 11 are two longitudinal beams close to each other in the two frames 10, and the outer longitudinal beams 12 are two longitudinal beams far away from each other in the two frames 10, and the cross beams 13 are arranged between the inner longitudinal beams 11 and the outer longitudinal beams 12. In this embodiment, four cross beams 13 are arranged on each frame to facilitate the installation of the support insulator 15.

[0045] Specifically, two ends of the oblique-stayed insulator 7 are respectively connected to the inner ends of the valve modules I and II of adjacent but different valve layers 1 , that is, the ends of the inner longitudinal beams 11 of the frame 10 .

[0046] Preferably, a valve layer shielding cover 14 is provided on the outer side of each valve layer 1 .

[0047] In order to support the frames 10 of the valve modules of each layer, the frames 10 between adjacent valve layers 1 are connected via support insulators 15 .

[0048] Preferably, the lower end of the support insulator 15 is installed on the beam 13 of the valve layer 1 below it through the support seat 24, and the upper end directly rests on the bottom of the beam 13 of the valve layer 1 above it. The support seat 24 is pre-installed on the beam 13, so there is no need to pre-install the support insulator 15 on the valve layer 1 where it is located, which makes it more convenient to move and lift the valve layer 1.

[0049] Specifically, two ends of the support insulator 15 are respectively mounted on the cross beams 13 of the upper and lower valve layers 1 thereof.

[0050] In addition, a base 16 is connected below the lowest valve layer 1 through a supporting insulator 15, and the entire valve tower is supported on the ground by the base 16 to realize its vertical structure.

[0051] The uppermost valve layer 1 and the grading ring 2 are also connected by a support insulator 16 , so as to facilitate the fixed support of the grading ring 16 .

[0052] The maintenance platform 4 is provided to facilitate the power outage maintenance of the valve tower. Specifically, the maintenance platform 4 is installed on the inner longitudinal beams 11 of the two valve modules on the same layer and can move in the length direction of the inner longitudinal beams 11 .

[0053] Optionally, a groove cooperating with the inner longitudinal beam 11 is provided at the bottom of the side of the maintenance platform 4, so that the maintenance platform 4 can slide in the length direction of the inner longitudinal beam 11, thereby facilitating the adjustment of the position of the maintenance platform 4 according to the required maintenance position, and the relative sliding surface between the maintenance platform 4 and the inner longitudinal beam 11 can be provided with sliding parts such as ball bearings to ensure the smooth sliding of the maintenance platform 4.

[0054] Optionally, the maintenance platform 4 is directly mounted on the inner longitudinal beam 11 of the same valve layer 1, and can be freely moved in the length direction of the inner longitudinal beam 11, and the maintenance platform 4 is welded by multiple parallel square steels and a bottom plate, and the arrangement of the square steels can increase the support strength of the maintenance platform 4. This embodiment uses a maintenance platform 4 of this structure.

[0055] Further preferably, in order to ensure the stability of the maintenance platform 4 during the maintenance process, positioning holes are evenly arranged on the inner longitudinal beam 11, and fixing holes are also arranged on the maintenance platform 4. The maintenance platform 4 is fixed by bolts or positioning pins passing through the fixing holes and the positioning holes in sequence, thereby ensuring safety during the maintenance process.

[0056] The cooling water pipeline 8 is a spiral structure, and an exhaust valve 17 is provided at the top of one of the cooling water pipelines 8 of the valve modules in the same column.

[0057] The cooling water pipeline 8 adopts a spiral structure, which can increase the length of the cooling water pipeline 8 within the limited distance between the two valve layers 1, thereby ensuring the creepage distance, improving the insulation effect, and preventing discharge breakdown.

[0058] Preferably, in order to ensure the firmness of the cooling water pipeline 8, the cooling water pipeline 8 is suspended on the crossbeam 13 of the valve layer above it through a suspension rod 25.

[0059] In this embodiment, two cooling water pipelines 8 are arranged in each column of valve modules, one of which serves as a water inlet pipe and the other as a water outlet pipe. The two cooling water pipelines 8 are connected in series from top to bottom to connect the radiators of the valve modules, and the lower ends of the two cooling water pipelines 8 are merged and connected to the main water pipe.

[0060] An exhaust valve 17 is provided at the water inlet end to facilitate exhausting the air in the cooling water pipeline 8 during water delivery, thereby increasing the speed of water delivery.

[0061] Preferably, in order to realize the cooling water circuit connection of the valve modules between adjacent valve layers 1 and facilitate the connection of the cooling water to the radiator of the valve module, a water pipe joint 18 is provided in the frame 10, and the upper and lower ends of the water pipe joint 18 are respectively connected to the cooling water pipe 8, and the cooling water pipe 8 between adjacent valve layers 1 is connected through the water pipe joint 18.

[0062] A hose with multiple interfaces is connected to the water pipe connector 18 , and the interfaces are respectively connected to the radiators of the valve module, so that the radiators are connected to the cooling circuit.

[0063] In order to further reduce the height of the valve tower, the pressure equalizing ring 2 adopts a split structure, and each pressure equalizing ring 2 is set at the same potential as the high potential end of the valve module below it.

[0064] The split arrangement of the pressure equalizing ring 3 means that each column of valve modules uses a separate pressure equalizing ring 3. In addition, the pressure equalizing ring 2 is light in weight and easy to install. Compared with the traditional top shielding cover, it can ensure the air circulation in the valve tower and improve the heat dissipation effect.

[0065] In order to quickly locate the position of the leaking valve module, an independent leak detection mechanism 3 is respectively provided below the two valve modules at the bottom layer.

[0066] The water leakage detection mechanism 3 includes a water receiving tray 19 and a water leakage detection device 20 arranged in the water receiving tray 19. When the valve module above the side of the water receiving tray 19 leaks, cooling water falls into the water receiving tray 19, and the water leakage detection device 20 can detect the leakage.

[0067] The water leakage detection device can be a water leakage detection device of model LSJC_D00014778 produced by Changzhou Borui Electric Power Automation Equipment Co., Ltd.

[0068] In order to prevent the optical cable from being exposed to the air and contaminated by dust, thereby reducing the insulation strength of the optical cable, at least two S-shaped optical cable grooves 21 are provided inside each column of valve modules.

[0069] Specifically, the optical cable groove 21 is arranged on the inner side of the valve module and is arranged close to the inner longitudinal beam 11 of the frame 10, which can further reduce the transverse size of the valve tower.

[0070] The optical cable groove 21 and the setting of its position can prevent the optical cable from being damaged.

[0071] Preferably, the optical cable groove 21 is made of insulating material and has a closed structure, which can provide better protection for the optical cable.

[0072] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A converter valve tower, characterized in that: The converter valve tower is a vertical structure, comprising at least two upper and lower stacked valve layers (1), a pressure equalizing ring (2) arranged above the uppermost valve layer (1), and a water leakage detection mechanism (3) arranged below the lowermost valve layer (1); each valve layer (1) comprises two valve modules arranged in parallel, and a detachable and translatable maintenance platform (4) is arranged between the valve modules on the same layer; the valve modules on the same layer are electrically connected by a pipe mother (5), the adjacent valve layers (1) are electrically connected by a cross-layer pipe mother (6), and the two ends of the adjacent valve layers (1) are connected by a diagonal insulator (7); at least two cooling water pipelines (8) are arranged in the valve modules on the same column; The valve module I and the valve module II located on the same layer are connected in series diagonally via a Z-shaped pipe mother (5); The valve module is mounted on a frame (10), the frame (10) comprising an inner longitudinal beam (11) and an outer longitudinal beam (12), and at least two cross beams (13) arranged between the inner longitudinal beam (11) and the outer longitudinal beam (12), and the valve module is mounted between the two cross beams (13); The frames (10) between adjacent valve layers (1) are connected via support insulators (15); The lower end of the support insulator (15) is mounted on the crossbeam (13) on the valve layer (1) below it through a support seat (24), and the upper end thereof directly abuts against the bottom of the crossbeam (13) of the upper valve layer (1).

2. The converter valve tower according to claim 1, characterized in that: The valve module I of the upper valve layer (1) is diagonally connected in series with the valve module II of the lower valve layer (1) via a Z-shaped cross-layer pipe mother (6).

3. The converter valve tower according to claim 1 or 2, characterized in that: One end of the tube mother (5) and the cross-layer tube mother (6) is rigidly connected, and the other end is flexibly connected.

4. The converter valve tower according to claim 1, characterized in that: The oblique insulators (7) between the two ends of the adjacent valve layers (1) are arranged in parallel.

5. The converter valve tower according to claim 1, characterized in that: The inspection platform (4) is installed on the inner longitudinal beams (11) of two valve modules on the same layer, and is movable in the length direction of the inner longitudinal beams (11).

6. The converter valve tower according to claim 1, characterized in that: The cooling water pipeline (8) is a spiral structure, and an exhaust valve (17) is provided at the top of one of the cooling water pipelines (8) of the valve modules in the same row.

7. The converter valve tower according to claim 1, characterized in that: The pressure equalizing ring (2) adopts a split structure, and each pressure equalizing ring (2) is set at the same electrical potential as the high-potential end of the valve module below it.

8. The converter valve tower according to claim 1, characterized in that: An independent water leakage detection mechanism (3) is respectively arranged below the two valve modules located at the bottom layer.

9. The converter valve tower according to claim 1, characterized in that: At least two S-shaped optical cable grooves (21) are arranged inside each row of valve modules.

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