Multifunctional vertically-arranged high-voltage cable residual cable well

Abstract

The utility model provides a multifunctional vertically-arranged high-voltage cable surplus cable well which comprises a base body and a step structure, the base body comprises a well cavity, a first channel and a second channel, the well cavity has the length direction and the height direction which are perpendicular to each other, a cavity opening communicated with the well cavity is formed in the base body upwards in the height direction, and a cavity opening communicated with the well cavity is formed in the base body upwards in the length direction. The first channel communicates with one side of the well cavity, the second channel communicates with the other opposite side of the well cavity, and the first channel and the second channel are both located on the side where the cavity opening is located in the height direction; the stepped structure is located in the well cavity, the stepped structure comprises multiple steps, in the height direction, the stepped structure communicates with the well cavity through the first channel and / or the second channel and extends to the bottom wall of the well cavity, and all the steps are sequentially close to the bottom wall of the well cavity step by step. According to the multifunctional vertically-arranged high-voltage cable residual cable well, the occupied area needed by arrangement can be reduced, and the feasibility of arranging the residual cable well in a pipeline dense scene is improved.

Description

Technical Field

[0001] This application relates to the field of power facility technology, specifically to a multifunctional vertically arranged high-voltage cable overflow well. Background Technology

[0002] When laying cable lines, a set of joints needs to be installed at regular intervals to facilitate cable replacement or maintenance. Spare cable wells are located at these joints to house spare cables. When a cable fails, the old insulated joint is cut off, and a new insulated joint is made using the spare cable to repair the cable. However, current spare cable wells occupy a large area. In complex scenarios with dense municipal pipelines, installing spare cable wells often requires relocating other municipal pipelines, which is time-consuming and difficult, making the installation of spare cable wells quite challenging. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a multifunctional vertically arranged high-voltage cable slack well, which can reduce the footprint and improve the feasibility of arranging slack wells in dense pipeline scenarios.

[0004] A multifunctional vertically arranged high-voltage cable slack well according to an embodiment of this application includes a base and a stepped structure;

[0005] The substrate includes a well cavity, a first channel, and a second channel. The well cavity has a length direction and a height direction that are perpendicular to each other. Along the height direction, the substrate has an opening that connects to the well cavity. Along the length direction, the first channel connects to one side of the well cavity, and the second channel connects to the opposite side of the well cavity. Along the height direction, both the first channel and the second channel are located on the side where the opening is located.

[0006] The stepped structure is located in the well cavity. The stepped structure includes multiple steps. Along the height direction, the stepped structure is connected to the well cavity by the first channel and / or the second channel, and extends to the bottom wall of the well cavity. Each step approaches the bottom wall in turn.

[0007] The multifunctional vertically arranged high-voltage cable slack manhole according to the embodiments of this application has at least the following beneficial effects: one of the first channel and the second channel is used for the cable to enter the manhole cavity, and the other of the first channel and the second channel is used for the cable to leave the manhole cavity. The manhole cavity is used to accommodate reserved cable slack. The stepped structure includes multiple steps, which facilitates access to the manhole cavity for cable maintenance. The stepped structure helps to increase the depth of the manhole cavity and ensures sufficient space for the slack cable. Therefore, in this application, the slack cable can be arranged in a curved state in the manhole cavity. The curved slack cable is located below the line connecting the first channel and the second channel. When maintenance is required, the cable can be accessed through the stepped structure. The stepped structure not only makes cable maintenance more convenient but also helps to increase the depth of the manhole cavity, giving it sufficient space to accommodate the slack cable. Compared with the cable slack manhole structure with two interconnected cable channels arranged horizontally, this structure helps to reduce the footprint and improves the feasibility of arranging slack cables in dense pipeline scenarios.

[0008] According to some embodiments of this application, the multifunctional vertically arranged high-voltage cable overflow well also includes a first support structure. The first support structure is located in the well cavity and extends along the length direction from the connection between the first channel and the well cavity to the connection between the second channel and the well cavity.

[0009] According to some embodiments of this application, the stepped structure includes a first stepped portion and a second stepped portion. The first stepped portion extends from the connection between the first channel and the well cavity to the bottom wall of the well cavity, and the second stepped portion extends from the connection between the second channel and the well cavity to the bottom wall of the well cavity. Along the height direction, the first stepped portion and the second stepped portion approach the bottom wall step by step.

[0010] According to some embodiments of this application, the first step portion and the second step portion are spaced apart along the length direction.

[0011] According to some embodiments of this application, the multifunctional vertically arranged high-voltage cable overflow well also includes a ladder structure that extends from the opening to the bottom wall of the well cavity along the height direction.

[0012] According to some embodiments of this application, the multifunctional vertical arrangement high-voltage cable surplus well also includes multiple support structures, each support structure being connected to a stepped structure, and each support structure being fixedly connected at intervals to at least a portion of each stepped level.

[0013] According to some embodiments of this application, the first support structure is detachably connected to the cavity wall of the well cavity.

[0014] According to some embodiments of this application, the multifunctional vertically arranged high-voltage cable overflow well also includes a second support structure. The second support structure is located in the well cavity and along the length direction. One end of the second support structure is connected to the first step portion, and the other end of the second support structure is connected to the second step portion.

[0015] According to some embodiments of this application, a multifunctional vertically arranged high-voltage cable overflow well includes a cover assembly, which is detachably connected to the base and covers the cavity opening.

[0016] According to some embodiments of this application, the cover plate assembly includes multiple cover plates, which are arranged sequentially and adjacent to each other along the length direction and together cover the cavity opening, and adjacent cover plates have a height difference along the height direction.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the cable well in an embodiment of this application;

[0020] Figure 2 This is a top view of the cable well in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of another cable well structure according to an embodiment of this application;

[0022] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0023] Reference numerals: 100 for base, 110 for well cavity, 120 for first channel, 130 for second channel, and 140 for bottom wall;

[0024] Step structure 200, first step section 210, second step section 220;

[0025] First support structure 310, second support structure 320, bracket structure 330;

[0026] Ladder structure 400;

[0027] Cover plate assembly 500, first cover plate 510, second cover plate 520, third cover plate 530, fourth cover plate 540, fifth cover plate 550;

[0028] First cable line 610, second cable line 620, insulating joint 630. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0033] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The embodiments of this application are described below with reference to the accompanying drawings:

[0035] refer to Figures 1 to 3According to an embodiment of this application, a multifunctional vertically arranged high-voltage cable slack well is installed below the ground plane. The multifunctional vertically arranged high-voltage cable slack well includes a base 100 and a stepped structure 200. The base 100 includes a well cavity 110, a first channel 120, and a second channel 130. The well cavity 110 has mutually perpendicular length and height directions. The well cavity 110 is used to accommodate reserved cable slack. Along the height direction, the base 100 has an opening communicating with the well cavity 110, which can be flush with the ground plane, allowing access to the well cavity 110 for cable maintenance. Along the length direction, the first channel 120 communicates with one side of the well cavity 110, and the second channel 130 communicates with the opposite side of the well cavity 110. The cable can enter the well cavity 110 through the first channel 120 and exit the well cavity 110 through the second channel 130. The cable is accommodated in a bent state within the well cavity 110 (e.g., Figure 1 and Figure 3 As shown in the first cable line 610), to ensure cable slack, when repairing the cable, first cut off the damaged section of the cable, then connect the two disconnected sections of cable and straighten them along the length (e.g., Figure 1 and Figure 3 As shown in the second cable line 620, the cable routing path in the well cavity 110 is parallel to the length direction. It should be noted that in the well cavity 110, the difference in size between the cable in the bent state and the straight state is the reserved cable slack length.

[0036] In addition, the stepped structure 200 is located in the well cavity 110. The stepped structure 200 includes multiple steps. Along the height direction, the stepped structure 200 is connected to the well cavity 110 by the first channel 120 and / or the second channel 130, and extends to the bottom wall 140 of the well cavity 110. Each step gradually approaches the bottom wall 140. The stepped structure 200 is used to provide support for the maintenance cable, making it easier for maintenance personnel to enter and exit the well cavity 110, effectively avoiding falls due to height differences during maintenance. At the same time, the setting of the stepped structure 200 can also ensure the depth of the well cavity 110. By increasing the depth of the well cavity 110 and reducing the horizontal footprint of the well cavity 110, the space for accommodating the cable in the well cavity 110 is guaranteed. The reduction of the footprint of the multi-functional vertical arrangement high-voltage cable surplus well is beneficial to improving the feasibility of the multi-functional vertical arrangement high-voltage cable surplus well in pipeline-dense scenarios.

[0037] It should be noted that the multifunctional vertically arranged high-voltage cable spare cable well of this application is applicable to the vertical arrangement of 110kV and above high-voltage cables. The first cable line 610 can be the newly constructed cable route, and the second cable line 620 can be the spare channel cable route. The first cable line 610 and the second cable line 620 represent two different cable lines. The cable is in a bent state in the well cavity 110, and the bent part of the cable is located below the line connecting the first channel 120 and the second channel 130. When a cable fault occurs, the faulty section of the cable, which is part of the bent section, is cut off, thereby stretching the cable along its length. Furthermore, the base 100 and the stepped structure 200 can be made of reinforced concrete, which provides higher structural stability.

[0038] refer to Figures 1 to 3 In some embodiments, the multifunctional vertically arranged high-voltage cable well also includes a first support structure 310. The first support structure 310 is located in the well cavity 110 and extends along the length direction from the connection between the first channel 120 and the well cavity 110 to the connection between the second channel 130 and the well cavity 110. The first support structure 310 is used to support the cable running along the second cable line 620, which is beneficial to ensuring the stability of the cable after maintenance.

[0039] Specifically, the excess cable portion is placed below the first support structure 310 along the first cable line 610. When a fault occurs in the pre-set excess cable, the faulty section can be cut off, and the cable arranged along the first cable line 610 can be stretched along its length until the cable runs along the second cable line 620 (i.e., the cable is stretched to the same height as the first support structure 310). The first support structure 310 is used to support the cable running along the second cable line 620. Compared with two horizontally arranged interconnected cable channels, the step of horizontally transporting the cable is eliminated. Instead, the cable is stretched straight and raised along its length, reducing wear between the cable and the ground, effectively reducing damage to the cable, ensuring the mechanical and insulation properties of the cable, and helping to extend the service life of the cable.

[0040] It should be noted that the first support structure 310 may include multiple channel steel structures, which are spaced apart along the length of the cavity 110. Along the height direction, the excess cable is bent and arranged below the first support structure 310. For example, the cable enters the cavity 110 through the first channel 120, passes below the first support structure 310, and is bent below the first support structure 310, finally exiting the cavity 110 through the second channel 130. This bending of the cable provides slack for cable maintenance and cutting. When maintaining the cable, a portion of the bent cable in the cavity 110 is cut off, causing the cable to become parallel to the length direction. That is, the cable path changes to be along the length direction, entering the cavity 110 through the first channel 120, where the cable is located above the first support structure 310, and finally exiting the cavity 110 through the second channel 130.

[0041] When the cable moves from below the first support structure 310 to above the first support structure 310 (while bending to straightening), the path of the cable from the first channel 120 to the second channel 130 is shortened. The difference in this path is the cable allowance, which is used to compensate for damaged or cut cables.

[0042] refer to Figures 1 to 3 In some embodiments, the first support structure 310 is detachably connected to the cavity wall of the well cavity 110. The first support structure 310 can be a channel steel beam, and a channel steel bracket can be reserved on the surface of the cavity wall of the well cavity 110. When the cable is being repaired, the cable is stretched from a bent state to a straight state along the length direction, and then the first support structure 310 is inserted into the channel steel bracket to support the cable. Thus, when the cable is being repaired, it is not necessary to cut the cable first and then lift it above the first support structure 310 for support. Instead, the cable can be repaired and maintained under the support of the first support structure 310, which makes the cable construction operation more convenient.

[0043] refer to Figures 1 to 3 In some embodiments, the stepped structure 200 includes a first stepped portion 210 and a second stepped portion 220. The first stepped portion 210 extends from the connection between the first channel 120 and the well cavity 110 to the bottom wall 140 of the well cavity 110. The second stepped portion 220 extends from the connection between the second channel 130 and the well cavity 110 to the bottom wall 140 of the well cavity 110. Along the height direction, the first stepped portion 210 and the second stepped portion 220 approach the bottom wall 140 step by step. The first stepped portion 210 and the second stepped portion 220 are both used to provide support, which facilitates access to the well cavity 110 for cable inspection and maintenance. The cooperation between the first stepped portion 210 and the second stepped portion 220 is beneficial to further improve the flexibility of the maintenance station in the well cavity 110.

[0044] Specifically, along the length direction, the perpendicular line passing through the midpoint of the well cavity 110 is used as the axis of symmetry. The first step 210 and the second step 220 are symmetrically arranged relative to the axis of symmetry. Both the first step 210 and the second step 220 have multiple steps. When inspecting the cable, firstly, the multiple steps make it easier for maintenance personnel to enter and exit the well cavity 110, effectively preventing maintenance personnel from falling and getting injured. Secondly, each step is at a different height relative to the bottom wall 140. Steps at different heights facilitate the inspection of various parts of the cable without having to remove the cable from the well cavity 110 for work, reducing damage to the cable and helping to extend the service life of the cable.

[0045] refer to Figures 1 to 3 In other embodiments, the multifunctional vertically arranged high-voltage cable manhole includes a first step 210, a second step 220, and a first support structure 310. Along the length direction, the first support structure 310 includes a plurality of spaced-apart channel steel structures, and along the width direction (the width direction, length direction, and height direction are mutually perpendicular). The manhole cavity 110 includes two opposing cavity walls. The channel steel structures are connected to one side of the cavity wall of the manhole cavity 110, while being spaced from the other side of the cavity wall. The space between the channel steel structures and the other side of the cavity wall allows cables to pass through, so that the cables are raised from the routing along the first cable line 610 to the routing along the second cable line 620. At the same time, the space between the channel steel structures, or the space between the channel steel structures and the cavity wall of the manhole cavity 110, allows maintenance personnel to pass through, and thus enter and exit the manhole cavity 110 through the first step 210 and the second step 220.

[0046] refer to Figures 1 to 3 In some embodiments, the first step portion 210 and the second step portion 220 are spaced apart along the length direction, which makes it easier to make full use of the depth space of the well cavity 110. This helps to reduce the bending radius of the cable without changing the size of the well cavity 110, thereby accommodating a longer excess cable within the limited space of the well cavity 110.

[0047] It should be noted that the length of the multifunctional vertical arrangement high-voltage cable surplus cable well in this application can be 9200mm, the height (i.e. the depth) is 4000mm, and the width is 2000mm. Based on the dimensions of the multifunctional vertical arrangement high-voltage cable surplus cable well, the turning radius of the above-mentioned cable can be 3000mm.

[0048] refer to Figures 1 to 3In some embodiments, the multi-functional vertically arranged high-voltage cable slack well further includes a second support structure 320. The second support structure 320 is located in the well cavity 110. Along the length direction, one end of the second support structure 320 is connected to the first step portion 210, and the other end of the second support structure 320 is connected to the second step portion 220. Along the height direction, the second support structure 320 may be located on the side of the first support structure 310 near the bottom wall 140 of the well cavity 110. The second support structure 320 is used to support the insulating joint 630 (see reference). Figure 3 This allows the multi-functional vertically arranged high-voltage cable surplus well to also be used as a joint well, which helps reduce the number of well locations and lower construction costs.

[0049] refer to Figures 1 to 3 In some embodiments, the multifunctional vertically arranged high-voltage cable well also includes a ladder structure 400. Along the height direction, the ladder structure 400 extends from the opening of the well cavity 110 to the bottom wall 140 of the well cavity 110. Through the ladder structure 400, the bottom wall 140 of the well cavity 110 can be directly reached to inspect and maintain the cable.

[0050] Specifically, the ladder structure 400 is connected to the inner wall of the well cavity 110. Along the height direction, the step structure 200 covers part of the bottom wall 140 of the well cavity 110. The bottom wall 140 of the well cavity 110 can be directly reached through the ladder steps, avoiding contact with the cable during descent. The ladder structure 400 and the step structure 200 can provide multiple ways to enter the well cavity 110, which is beneficial to improving the flexibility of maintenance.

[0051] refer to Figures 1 to 3 In other embodiments, the multifunctional vertically arranged high-voltage cable surplus manhole includes a first step section 210, a second step section 220, and a climbing structure 400. The first step section 210, the second step section 220, and the climbing structure 400 are all located within the manhole cavity 110. Along the length direction, the first step section 210 and the second step section 220 are spaced apart. Along the height direction, the climbing structure 400 extends from the opening of the manhole cavity 110 to the position between the first step section 210 and the second step section 220. Therefore, the multifunctional vertically arranged high-voltage cable surplus manhole of this application can be accessed from three positions: the first step section 210, the second step section 220, and the third step section, making maintenance operations more flexible.

[0052] refer to Figures 1 to 3In some embodiments, the multifunctional vertical arrangement high-voltage cable well also includes multiple support structures 330, each support structure 330 being connected to the step structure 200, and each support structure 330 being fixedly connected at intervals to at least a portion of each step. The support structures 330 are used to fix the cable, and each support structure 330 arranges the cable along a curved path (i.e., the first cable line 610) in the well cavity 110 to ensure that the turning radius of the cable meets the requirements, which is beneficial to improving the stability of the cable fixation.

[0053] In addition, the cooperation between the stepped structure 200 and the support structure 330 helps to shorten the length of each support structure 330, making the clamping support of each support structure 330 for the cable more stable.

[0054] It should be noted that for cables of 110KV and below, the bending radius shall not be less than 15 times the cable's outer diameter. This bending radius can also be determined based on the cable's material properties, structural strength, and safety operation requirements to ensure the safety of cable power transmission. The installation position of each support structure 330 can be adjusted as needed, ensuring connection with the stepped structure 200. The ends of the support structures 330 are equipped with fixing clips to secure the cables. Under the clamping of each support structure 330, the cable's bending radius exceeds the minimum bending radius, preventing internal bending of the cable from causing faults.

[0055] refer to Figures 1 to 4 In some embodiments, the multifunctional vertically arranged high-voltage cable manhole also includes a cover plate assembly 500, which is detachably connected to the base 100 and covers the cavity opening. The cover plate assembly 500 is used to seal the manhole cavity 110, which helps to protect the cables in the manhole cavity 110 and prevent pedestrians, vehicles or other objects from falling into the manhole cavity 110. In addition, by removing the cover plate assembly 500, the manhole cavity 110 can be connected to the outside world, which facilitates inspection and maintenance.

[0056] refer to Figures 1 to 4 In other embodiments, the cover plate assembly 500 is rotatably connected to the base 100. By rotating the cover plate assembly 500, the well cavity 110 can be closed and opened. When it is necessary to disassemble and maintain the cable, the well cavity 110 can be entered by rotating the cover plate assembly 500 without removing the cover plate assembly 500, making cable maintenance more convenient.

[0057] refer to Figures 1 to 4In some embodiments, the cover plate assembly 500 includes multiple cover plates arranged sequentially and adjacently along the length direction, which together cover the opening of the well cavity 110. In the height direction, there is a height difference between adjacent cover plates. Thus, when installing the cover plates, part of the cover plate can be left exposed, while the cover plate closer to the bottom wall 140 of the well cavity 110 can be covered by road backfilling. The structure of the multi-functional vertical arrangement high-voltage cable surplus well is simpler and more aesthetically pleasing.

[0058] It should be noted that the height difference between the cover plates should ensure that the two adjacent cover plates abut against each other. That is, the two adjacent cover plates have a first thickness and a second thickness, the first thickness being less than the second thickness. The height difference between the adjacent cover plates should not exceed the first thickness. For example, the lower surface of one cover plate is at the same height as the upper surface of another cover plate, thereby preventing backfill material from leaking from between the two cover plates into the well cavity 110 during road backfilling.

[0059] refer to Figures 1 to 4 Specifically, the cover plate assembly 500 includes a first cover plate 510, a second cover plate 520, a third cover plate 530, a fourth cover plate 540, and a fifth cover plate 550. Along the length direction, the first cover plate 510, the second cover plate 520, the third cover plate 530, the fourth cover plate 540, and the fifth cover plate 550 are arranged adjacent to each other in sequence. The first cover plate 510, the third cover plate 530, and the fifth cover plate 550 are at the same height, the second cover plate 520 and the fourth cover plate 540 are at the same height, and the upper surfaces of the first cover plate 510, the third cover plate 530, and the fifth cover plate 550 are at the same height as the ground.

[0060] In addition, the lower surfaces of the first cover plate 510, the third cover plate 530, and the fifth cover plate 550, and the upper surfaces of the second cover plate 520 and the fourth cover plate 540 are at the same height. The first cover plate 510, the second cover plate 520, and the third cover plate 530 together define the first groove, and the third cover plate 530, the fourth cover plate 540, and the fifth cover plate 550 define the second groove. The first groove and the second groove can be used for road backfilling to cover the second cover plate 520 and the fourth cover plate 540, making the exposed part of the multi-functional vertical arrangement high-voltage cable manhole structure simpler and more aesthetically pleasing.

[0061] The first cover plate 510, the third cover plate 530, and the fifth cover plate 550 are detachably connected to the base 100 to form openings in three different locations for entering and exiting the well cavity 110, so as to take into account both the flexibility of cable maintenance and the aesthetics of multifunctional vertical arrangement of high-voltage cable surplus wells.

[0062] It should be noted that, along the height direction, the first cover plate 510 can be projected onto the surface of the first step 210, the third cover plate 530 can be projected between the first step 210 and the second step 220, and the fifth cover plate 550 can be projected onto the surface of the second step 220. Thus, the first cover plate 510, the third cover plate 530 and the fifth cover plate 550 can be opened as needed to enter the well cavity 110 from different positions to inspect the cable.

[0063] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A multifunctional vertically arranged high-voltage cable surplus manhole, characterized in that, include: The base includes a well cavity, a first channel, and a second channel. The well cavity has a length direction and a height direction that are perpendicular to each other. Along the height direction, the base has an opening that communicates with the well cavity. Along the length direction, the first channel communicates with one side of the well cavity, and the second channel communicates with the opposite side of the well cavity. Along the height direction, both the first channel and the second channel are located on the side where the opening is located. A stepped structure is located in the well cavity. The stepped structure includes multiple steps. Along the height direction, the stepped structure is connected to the well cavity by the first channel and / or the second channel, and extends to the bottom wall of the well cavity. Each step is progressively closer to the bottom wall.

2. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 1, characterized in that, The multifunctional vertically arranged high-voltage cable surplus well also includes a first support structure, which is located in the well cavity and extends along the length direction from the connection point between the first channel and the well cavity to the connection point between the second channel and the well cavity.

3. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 2, characterized in that, The first support structure is detachably connected to the cavity wall of the well cavity.

4. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 1, characterized in that, The stepped structure includes a first stepped section and a second stepped section. The first stepped section extends from the connection between the first channel and the well cavity to the bottom wall of the well cavity. The second stepped section extends from the connection between the second channel and the well cavity to the bottom wall of the well cavity. Along the height direction, the first stepped section and the second stepped section approach the bottom wall step by step.

5. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 4, characterized in that, Along the length direction, the first stepped portion and the second stepped portion are spaced apart.

6. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 4, characterized in that, The multifunctional vertically arranged high-voltage cable surplus well also includes a second support structure. The second support structure is located in the well cavity and along the length direction. One end of the second support structure is connected to the first step portion, and the other end of the second support structure is connected to the second step portion.

7. The multifunctional vertically arranged high-voltage cable surplus manhole according to any one of claims 1 to 5, characterized in that, The multifunctional vertically arranged high-voltage cable surplus manhole also includes a ladder structure, which extends from the opening to the bottom wall of the manhole along the height direction.

8. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 1, characterized in that, The multifunctional vertically arranged high-voltage cable surplus well also includes multiple support structures, each of which is connected to the stepped structure, and each of the support structures is fixedly connected at intervals to at least a portion of each step.

9. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 1, characterized in that, The multifunctional vertically arranged high-voltage cable surplus manhole includes a cover plate assembly, which is detachably connected to the base and covers the cavity opening.

10. The multifunctional vertically arranged high-voltage cable surplus manhole according to claim 9, characterized in that, The cover plate assembly includes multiple cover plates, which are arranged sequentially and adjacently along the length direction to cover the cavity opening, and adjacent cover plates have a height difference along the height direction.

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