Flexible direct-current converter station valve hall wall bushing

Abstract

The invention provides a flexible direct-current converter station valve hall wall bushing which comprises a supporting part arranged on the wall bushing and used for supporting the wall bushing, batter braces are arranged on the two sides of the supporting part, and one ends of the two batter braces are arranged at the corresponding connecting positions of a cross beam and two valve hall steel columns respectively. The supporting part comprises an upper shell, a lower shell and a locking assembly, the upper shell and the lower shell are in butt joint to form a positioning space used for clamping and fixing the wall bushing, and the locking assembly is used for locking the relative position of the upper shell and the lower shell after butt joint on the wall bushing; the distance adjusting assembly is used for adjusting the length of the batter brace. Vertical loads are shared through the batter braces, the problems that in a large-span valve hall, a traditional full-length steel beam is large in deflection and high in steel consumption are effectively solved, and the large-span valve hall has the advantages of being light in structure, stable in stress, convenient and fast to install and high in adaptability.

Description

Technical Field

[0001] This invention relates to the field of power system technology, specifically to a flexible DC converter station valve hall through-wall bushing. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Flexible DC transmission technology, as a new generation of DC transmission technology, has significant advantages in areas such as renewable energy grid integration, isolated power supply, and urban power grid capacity expansion. Compared with conventional ordinary voltage level converter stations, flexible DC converter stations have newer and more numerous electrical equipment, and due to requirements such as insulation distance and heat dissipation, their valve hall structures are often much larger.

[0004] In existing technologies, the installation and support of through-wall sleeves in valve halls typically employ a structural form of "continuous connecting steel beams" (such as...). Figure 1 This involves installing a transverse connecting steel beam 26 between the two valve hall steel columns 3, and mounting brackets 25 on the connecting steel beam 26 to fix the sleeve. However, this traditional solution has the following problems when applied to the valve hall of a large-span flexible DC converter station: Firstly, due to the extremely large span of the connecting steel beam 26, it is prone to significant bending deformation under the weight of the through-wall sleeve and wind loads, making it difficult to meet the installation and positioning requirements of precision electrical equipment. Secondly, the traditional method of controlling the bending deformation of the steel beam is to significantly increase the cross-sectional dimensions and wall thickness of the steel beam, resulting in a sharp increase in steel consumption and a significant increase in project cost. In addition, the huge self-weight of the steel beam makes high-altitude hoisting, positioning, and welding operations extremely difficult, increasing construction risks and time, and affecting the overall economy and convenience of the construction of the flexible DC grid converter station.

[0005] To address these issues, the present invention provides a flexible through-wall bushing for the valve hall of a DC converter station. Summary of the Invention

[0006] The main objective of this invention is to provide a flexible DC converter station valve hall through-wall bushing that can adapt to the needs of large-span valve halls, has a stable stress distribution, a lightweight structure, and is easy to construct and install.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a flexible DC converter station valve hall through-wall bushing includes a support part disposed on the through-wall bushing for supporting the through-wall bushing, and diagonal braces disposed on both sides of the support part, with one end of each diagonal brace disposed at the corresponding connection point between the crossbeam and the two valve hall steel columns; the support part includes an upper shell, a lower shell, and a locking assembly, the upper shell and the lower shell are joined together to form a positioning space for clamping and fixing the through-wall bushing, and the locking assembly is used to lock the relative position of the upper shell and the lower shell after they are joined on the through-wall bushing; it also includes an adjustment assembly for adjusting the length of the diagonal braces.

[0008] Furthermore, the locking assembly includes two first mating plates, two second mating plates, and four positioning seats. The two first mating plates are disposed opposite to each other on both sides of the upper housing, and the two second mating plates are disposed opposite to each other on both sides of the lower housing. The four positioning seats are grouped in pairs, and two positioning seats in each group are detachably disposed on the first and second mating plates located on the same side to lock the relative position between the first and second mating plates.

[0009] Furthermore, the first docking plate and the second docking plate located on the same side are docked to form a docking block, and the side of the positioning seat is provided with a docking groove that is inserted and engaged with the docking block.

[0010] Furthermore, the two positioning seats in each group are symmetrically distributed along the length of the docking block.

[0011] Furthermore, a positioning block is provided above the positioning seat, and slots are provided on opposite sides of the two positioning blocks located on the same side. A synchronization block for connecting the diagonal tie rod is provided above the docking block, and the two ends of the synchronization block are respectively inserted into the two slots. The same positioning rod is inserted on the positioning seat, docking block, synchronization block and positioning block corresponding to the position, and a nut that is pressed and fitted with the top surface of the positioning block is threaded on the top of the positioning rod.

[0012] Furthermore, the positioning seat has a first through hole for the positioning rod to pass through, the first docking plate and the second docking plate both have a second through hole for the positioning rod to pass through, the synchronizing block has a third through hole for the positioning rod to pass through, and the positioning block has a fourth through hole for the positioning rod to pass through.

[0013] Furthermore, the adjusting assembly includes an ear seat fixed to the top of the synchronizing block, a cylinder pinned to the ear seat, a connecting rod concentrically threaded into one end of the cylinder, a lifting ring at one end of the connecting rod, one end of the diagonal tie rod connected to the lifting ring via a hook, and the other end fixed to the connection between the crossbeam and the valve hall steel column.

[0014] Furthermore, the connection between the steel column of the valve hall and the crossbeam is provided with reinforcing ribs, and the reinforcing ribs are connected to the diagonal tie rods by bolts.

[0015] The beneficial effects of this invention are reflected in: The flexible through-wall bushing for the valve hall of the present invention effectively solves the problems of large deflection and high steel consumption of traditional continuous steel beams in large-span valve halls by sharing the vertical load through diagonal tie rods. It has the advantages of lightweight structure, stable stress, convenient installation and strong adaptability. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a structural diagram illustrating the existing technology of supporting and installing through-wall sleeves on the connecting steel beams between steel columns in the valve hall. Figure 2 This is a schematic diagram of the structure of the through-wall sleeve of the present invention in a supported installation state between the steel columns of the valve hall; Figure 3 for Figure 2 A partial structural diagram; Figure 4 for Figure 2 A schematic diagram of the structure in which the upper and lower outer shells meet to form a support section; Figure 5 for Figure 4 A schematic diagram of the structure in which the upper and lower outer shells are not docked; Figure 6 for Figure 3 Schematic diagram of the structure including the synchronization block and cylinder; Figure 7 for Figure 3 A schematic diagram of the middle positioning seat, positioning block and positioning rod; Figure 8 for Figure 7 A partial cross-sectional view of the positioning base and positioning block from another perspective.

[0017] Explanation of reference numerals in the attached figures: 1. Support unit; 101. Upper outer shell; 102. Lower outer shell; 2. Through-wall sleeve; 3. Valve hall steel column; 4. Crossbeam; 5. Reinforcing rib; 6. Diagonal tie rod; 7. First connecting plate; 8. Second connecting plate; 9. Sub-slot; 10. Positioning seat; 11. Connecting slot; 12. Positioning block; 13. Slot; 14. Positioning rod; 15. Nut; 16. Synchronizing block; 17. First through hole; 18. Second through hole; 19. Third through hole; 20. Ear seat; 21. Pin; 22. Cylinder; 23. Connecting rod; 24. Lifting ring; 25. Mounting seat; 26. Connecting steel beam. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] Please combine Figures 2 to 8 The flexible DC converter station valve hall through-wall bushing includes a support part 1 installed on the through-wall bushing 2 to support the through-wall bushing 2. Diagonal braces 6 are provided on both sides of the support part 1, with one end of each brace 6 located at the corresponding connection point between the crossbeam 4 and the two valve hall steel columns 3. The support part 1 includes an upper outer shell 101, a lower outer shell 102, and a locking assembly. The upper outer shell 101 and the lower outer shell 102 are joined to form a positioning space for clamping and fixing the through-wall bushing 2. The locking assembly is used to lock the relative position of the upper outer shell 101 and the lower outer shell 102 after they are joined on the through-wall bushing 2. It also includes an adjustment assembly for adjusting the length of the braces 6. The inner sides of both the upper outer shell 101 and the lower outer shell 102 have sub-grooves 9 that fit and conform to the outer wall of the through-wall bushing 2. The cross-section of the sub-grooves 9 is an arc-shaped structure that conforms to the outer wall of the through-wall bushing 2.

[0020] In specific implementation, during assembly, the upper outer shell 101 and the lower outer shell 102 are first fitted onto the outside of the through-wall sleeve 2, and with the use of the locking component, the relative positions of the upper outer shell 101 and the lower outer shell 102 on the through-wall sleeve 2 are locked. Then, the diagonal tie rod 6 is installed on the support part 1, and the overall length of the diagonal tie rod 6 is adjusted with the adjustment component. Then, the corresponding ends of the diagonal tie rod 6 are connected to the corresponding connection points of the crossbeam 4 and the valve hall steel column 3, so as to form a "beam-tie" combined support system for the through-wall sleeve 2 between the valve hall steel columns 3.

[0021] The advantage of this design is that it breaks away from the traditional single-stress mode of "simply supported beam bending" and constructs a beam-tension composite support system. Specifically, by installing diagonal braces 6 on both sides of the support section 1, the support section 1 is connected to the junction of the crossbeam 4 and the valve hall steel column 3, forming a stable triangular load-bearing structure. The diagonal braces 6 share the main vertical load, eliminating the need for heavy solid-web steel beams for the crossbeam 4, thus significantly reducing the overall steel consumption. Simultaneously, the components (shell, diagonal braces 6) are small in size and lightweight, facilitating separate transportation and high-altitude assembly, reducing hoisting difficulty and construction costs, and improving the project's economic efficiency.

[0022] This design effectively converts the vertical gravity and bending moment of the through-wall sleeve 2 into the axial tension of the tie rod 6, significantly reducing the mid-span bending deformation of the crossbeam 4, making the stress pattern between the valve hall steel column 3 and the crossbeam 4 more stable, thus meeting the large-span structural requirements of the valve hall of the flexible DC converter station.

[0023] In one embodiment, the locking assembly includes two first docking plates 7, two second docking plates 8, and four positioning seats 10. The two first docking plates 7 are disposed opposite to each other on both sides of the upper housing 101, and the two second docking plates 8 are disposed opposite to each other on both sides of the lower housing 102. The four positioning seats 10 are grouped in pairs, and two positioning seats 10 in each group are detachably disposed on the first docking plates 7 and the second docking plates 8 located on the same side to lock the relative position between the first docking plates 7 and the second docking plates 8.

[0024] Thus, the upper outer shell 101 and the lower outer shell 102 can be initially connected through the first docking plate 7, the second docking plate 8 and the positioning seat 10 on both sides.

[0025] The first docking plate 7 and the second docking plate 8 located on the same side are docked to form a docking block, and the side of the positioning seat 10 is provided with a docking groove 11 that is inserted and matched with the docking block. The two positioning seats 10 in each group are symmetrically distributed in the length direction of the docking block.

[0026] In this way, the docking block can be assembled and fixed through the docking groove 11 to maintain the stability of the support part 1 formed between the upper outer shell 101 and the lower outer shell 102.

[0027] In one embodiment, a positioning block 12 is provided above the positioning seat 10. The two positioning blocks 12 located on the same side are provided with slots 13 on opposite sides. A synchronization block 16 for connecting the diagonal tie rod 6 is provided above the docking block. The two ends of the synchronization block 16 are respectively inserted into the two slots 13. The same positioning rod 14 is inserted on the positioning seat 10, docking block, synchronization block 16 and positioning block 12 corresponding to the position. The top end of the positioning rod 14 is threaded with a nut 15 that is pressed and engaged with the top surface of the positioning block 12.

[0028] The positioning base 10 has a first through hole 17 for the positioning rod 14 to pass through, the first docking plate 7 and the second docking plate 8 both have a second through hole 18 for the positioning rod 14 to pass through, the synchronizing block 16 has a third through hole 19 for the positioning rod 14 to pass through, and the positioning block 12 has a fourth through hole for the positioning rod 14 to pass through.

[0029] Thus, after the first docking plate 7 and the second docking plate 8 are docked to form a docking block, the synchronization block 16 is placed on the docking block. Then, the two positioning blocks 12 are inserted into the two ends of the synchronization block 16 through their respective slots 13. Then, the positioning rod 14 is inserted from the bottom side of the positioning seat 10, so that the positioning rod 14 passes through the first through hole 17, the second through hole 18, the third through hole 19 and the fourth through hole in sequence. The nut 15 is rotated and sleeved on the top of the positioning rod 14 until it is pressed and fixed on the top of the positioning block 12. In this way, the positioning seat 10, the docking block, the synchronization block 16 and the positioning block 12 form a whole.

[0030] In summary, because the support unit 1 adopts a split design with the upper outer shell 101 and the lower outer shell 102 docking, it can be easily fitted onto the outside of the through-wall sleeve 2. Combined with a unique locking assembly, it not only achieves initial docking between the upper and lower outer shells, but also locks the positioning seat 10, docking block, synchronization block 16, and positioning block 12 into a single unit via the positioning rod 14. This multi-locking mechanism ensures the tightness and stability of the support unit 1's clamping of the through-wall sleeve 2, preventing loosening during operation.

[0031] In one embodiment, the pitch adjustment assembly includes an ear seat 20 fixed to the top of the synchronizing block 16. A cylinder 22 is pinned to the ear seat 20, and a pin 21 is inserted and fixed to the cylinder 22. The pin 21 is rotatably inserted into the ear seat 20. A connecting rod 23 is concentrically threaded into one end of the cylinder 22. A lifting ring 24 is provided at one end of the connecting rod 23. One end of the diagonal tie rod 6 is connected to the lifting ring 24 through a hook, and the other end is fixed to the connection between the crossbeam 4 and the valve hall steel column 3.

[0032] Thus, the axial extension length of the connecting rod 23 relative to the cylinder 22 can be adjusted by the threaded action between the connecting rod 23 and the cylinder 22, thereby indirectly adjusting the length of the diagonal tie rod 6 so that the support part 1 can adapt to the installation between steel columns 3 of different spans in the valve hall.

[0033] In one embodiment, a reinforcing rib 5 is provided at the connection between the valve hall steel column 3 and the crossbeam 4. The reinforcing rib 5 is connected to the diagonal tie rod 6 by bolts. Thus, during construction and installation, the overall length of the diagonal tie rod 6 can be precisely adjusted by rotating the cylinder 22 to adjust the extension length of the connecting rod 23. This design can not only adapt to the installation distance between valve hall steel columns 3 of different spans, but also effectively eliminate the influence of installation deviations or processing errors of the valve hall steel column 3, ensuring the accuracy of the installation position of the through-wall sleeve 2.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0035] It should be noted that if the embodiments of the invention involve directional indicators (such as up and down), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. Additionally, if the embodiments of the invention involve descriptions such as "first," "second," etc., these descriptions are 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, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the invention.

Claims

1. A flexible DC converter station valve hall through-wall bushing, characterized in that, The system includes a support part (1) installed on the through-wall sleeve (2) for supporting the through-wall sleeve (2). The support part (1) is provided with diagonal braces (6) on both sides. One end of each diagonal brace (6) is respectively installed at the connection point between the crossbeam (4) and the two valve hall steel columns (3). The support part (1) includes an upper shell (101), a lower shell (102) and a locking assembly. The upper shell (101) and the lower shell (102) are connected to form a positioning space for clamping and fixing the through-wall sleeve (2). The locking assembly is used to lock the relative position of the upper shell (101) and the lower shell (102) after they are connected on the through-wall sleeve (2). The system also includes a distance adjustment assembly for adjusting the length of the diagonal braces (6).

2. The flexible DC converter station valve hall through-wall bushing as described in claim 1, characterized in that, The locking assembly includes two first docking plates (7), two second docking plates (8), and four positioning seats (10). The two first docking plates (7) are disposed opposite to each other on both sides of the upper housing (101), and the two second docking plates (8) are disposed opposite to each other on both sides of the lower housing (102). The four positioning seats (10) are grouped in pairs. Two positioning seats (10) in each group are detachably disposed on the first docking plate (7) and the second docking plate (8) located on the same side to lock the relative position between the first docking plate (7) and the second docking plate (8).

3. The flexible DC converter station valve hall through-wall bushing as described in claim 2, characterized in that, The first docking plate (7) and the second docking plate (8) located on the same side are docked to form a docking block, and the side of the positioning seat (10) is provided with a docking groove (11) that is inserted and matched with the docking block.

4. The flexible DC converter station valve hall through-wall bushing as described in claim 3, characterized in that, The two positioning seats (10) in each group are symmetrically distributed along the length of the docking block.

5. The flexible DC converter station valve hall through-wall bushing as described in claim 3, characterized in that, A positioning block (12) is provided above the positioning seat (10). The two positioning blocks (12) on the same side are provided with slots (13) on opposite sides. A synchronization block (16) for connecting the diagonal tie bar (6) is provided above the docking block. The two ends of the synchronization block (16) are respectively inserted into the two slots (13). The positioning seat (10), docking block, synchronization block (16) and positioning block (12) are all provided with the same positioning rod (14). The top of the positioning rod (14) is threaded with a nut (15) that is pressed against the top surface of the positioning block (12).

6. The flexible DC converter station valve hall through-wall bushing as described in claim 5, characterized in that, The positioning base (10) has a first through hole (17) through which the positioning rod (14) passes. The first docking plate (7) and the second docking plate (8) both have a second through hole (18) through which the positioning rod (14) passes. The synchronizing block (16) has a third through hole (19) through which the positioning rod (14) passes. The positioning block (12) has a fourth through hole through which the positioning rod (14) passes.

7. The flexible DC converter station valve hall through-wall bushing as described in claim 6, characterized in that, The adjustable distance assembly includes an ear seat (20) fixed on the top of the synchronization block (16), a cylinder (22) is pinned to the ear seat (20), a connecting rod (23) is concentrically threaded at one end of the cylinder (22), a lifting ring (24) is provided at one end of the connecting rod (23), one end of the diagonal tie bar (6) is connected to the lifting ring (24) by a hook, and the other end is fixed at the connection between the crossbeam (4) and the valve hall steel column (3).

8. The flexible DC converter station valve hall through-wall bushing as described in claim 7, characterized in that, A reinforcing rib (5) is provided at the connection between the valve hall steel column (3) and the crossbeam (4), and the reinforcing rib (5) is connected to the diagonal tie rod (6) by bolts.

Images