A fully gravity-fed drainage structure for switchyards
By installing site drainage ditches, collection wells, and drainage pipes at the switch station, the problem of water seepage in the basement of the switch station was solved by utilizing the principle of gravity flow, achieving gravity drainage, reducing operation and maintenance costs, and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA HUADONG ENG CORP LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing technology, when water seepage occurs in the basement of the relay protection building and GIS room of the switch station and the cable corridor, water pumps are needed to pump out the water. If the pumping equipment fails or the power is cut off, there is a risk of flooding, which increases the operation and maintenance costs.
Design a gravity-fed drainage structure for switch stations, including site drainage ditches, sump pits, and drainage pipes. Utilizing the principle of gravity flow, by setting up site drainage ditches, basement drainage ditches, cable corridor drainage ditches, and sump pits, and combining the height design of the drainage pipes, gravity drainage of the basement is achieved, avoiding reliance on pumping equipment.
It enables gravity drainage in the switch station, reduces drainage pressure in the basement, lowers project investment and operation and maintenance costs, improves flood safety, and eliminates the need for personnel on duty.
Smart Images
Figure CN224288909U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy and hydropower technology, specifically to a fully gravity-flow drainage structure for switchyards. Background Technology
[0002] Switching stations, also known as switching yards, play an increasingly important role in grid-based power grid management. In the hydropower and water conservancy industries, electrical energy is transmitted from the power plant to the power grid via switching stations, making them crucial locations for energy transfer. Taking pumped storage power stations as an example, switching stations typically include buildings and facilities such as relay protection towers, GIS rooms, cable corridors, and outgoing line structures. The relay protection towers and GIS rooms have basements for cable laying, and these basements are connected by cable corridors.
[0003] In existing technologies, the basements of relay protection buildings and GIS rooms, as well as cable corridors, are all located below ground level. Previously, indoor water seepage required pumping for drainage. However, if the pumping equipment malfunctions or experiences a power outage, there is a risk of flooding, increasing maintenance costs. Therefore, this invention proposes a fully gravity-fed drainage structure for switchyards. Utility Model Content
[0004] In order to overcome the problem that indoor water seepage requires the use of water pumps for drainage, and that if the drainage equipment malfunctions or there is a power outage, there is a risk of flooding.
[0005] Based on the above technical concept, the technical solution adopted by this utility model is as follows:
[0006] A fully gravity-fed drainage structure for a switchyard includes a switchyard site. A relay protection tower and a GIS (Gas Insulation System) tower are respectively installed on the top of the switchyard site. Both the relay protection tower and the GIS tower have basements for cable laying at their basements. The two basements are connected by a cable corridor. A site drainage ditch is installed around the outer perimeter of the switchyard site, an indoor drainage ditch is installed around the inner perimeter of the basements, and a corridor drainage ditch is installed inside the cable corridor. A collection well is also installed in the basement of the GIS tower. The indoor drainage ditches around the inner perimeter of the basements of both the relay protection tower and the GIS tower are used to drain water from the basements. The cable corridor has a corridor drainage ditch to drain water from the cable corridor. A collection well is also installed in the basement of the GIS tower to collect water from the relay protection tower and the cable corridor.
[0007] Further defining the above technical solution, the cable corridor is arranged underground, the basement height of the GIS building is greater than that of the relay protection building, and the height of the cable corridor gradually decreases as it approaches the GIS building, thereby achieving gravity drainage in the basement.
[0008] Further limitations on the above technical solution include the arrangement of drainage pipes within the soil and rock mass between the basement of the GIS building and the low-lying area outside the site. The side of the drainage pipe closest to the GIS building is located within a sump. The height of the drainage pipe gradually decreases as it approaches the low-lying area outside the site, allowing for gravity-driven drainage without the need for pumping.
[0009] Further limitations on the above technical solution include: at least two drainage pipes, serving as backups for each other; the diameter of the drainage pipes is not less than 100mm; and the drainage pipes are made of stainless steel or cast iron to improve their corrosion resistance.
[0010] Further defining the above technical solution, the inlet of the drain pipe is located in the water collection well and is higher than the bottom plate of the water collection well. A grate with orifices is installed on the side of the drain pipe facing the water collection well to prevent dirt from clogging the drain pipe.
[0011] Further defining the above technical solution, the height of the site drainage ditch gradually decreases from the middle to both sides along the length of the switchyard site, and the height of the site drainage ditch gradually decreases along the width of the switchyard site as it approaches the low-lying area outside the site, thereby achieving complete gravity drainage of the switchyard site surface.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] (1) Gravity discharge: By setting up drainage ditches around the perimeter of the switch station site, surface water can be discharged by gravity, which can effectively reduce the flow of surface water into the basements of the relay protection building and the GIS building, thereby effectively reducing the drainage pressure of the two basements.
[0014] (2) Centralized discharge: By setting up a water collection well in the basement of the GIS building, the water in the basement of the relay protection building and the cable corridor can be collected. By arranging drainage pipes in the soil and rock, it is convenient to centrally discharge the water in the later stage, reduce the layout of external drainage pipes, avoid large-scale open-cut construction of ditches, save land and save project investment.
[0015] (3) Low investment cost: The height of the cable corridor gradually decreases as it approaches the GIS building, and the height of the drainage pipe gradually decreases as it approaches the low-lying area outside the site, thus achieving gravity self-flow drainage that is safe and reliable. No personnel are required to be on duty, saving the pumping equipment and pumping operation and maintenance costs. It is not only economical, but also improves the inherent safety of the switch station in terms of flood prevention. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the planar structure of a fully gravity-fed drainage structure for a switchyard according to the present invention;
[0018] Figure 2 This is a schematic diagram of the main structure of a fully gravity-fed drainage structure for a switchyard according to the present invention;
[0019] Figure 3 This is a side sectional view of the water collection well of a fully gravity-fed drainage structure for a switch station according to this utility model.
[0020] Among them, 1. Switch station site; 2. Relay protection building; 3. GIS building; 4. Basement; 5. Cable corridor; 6. Site drainage ditch; 7. Indoor drainage ditch; 8. Corridor drainage ditch; 9. Water collection well; 10. Drainage pipe; 11. Orifice grate; 12. Low-lying area outside the site; 13. Rock and soil mass. Detailed Implementation
[0021] The following is in conjunction with the appendix Figures 1-3 The present invention will be described in further detail below.
[0022] Example 1: This example provides a fully gravity-fed drainage structure for a switchyard, such as... Figure 1 and Figure 2 As shown, it can solve the problem of water leakage in the room, which requires pumping. If the pumping equipment fails or there is a power outage, there will be flooding. It includes a switch station site 1. The top of the switch station site 1 is equipped with a relay protection building 2 and a GIS building 3. The bottom of the relay protection building 2 and the GIS building 3 are both equipped with a basement 4 for cable laying. The two basements 4 are connected by a cable corridor 5. The outer perimeter of the switch station site 1 is equipped with a site drainage ditch 6.
[0023] The height of the drainage ditch 6 gradually decreases from the middle to both sides along the length of the switchyard site 1, and the height of the drainage ditch 6 gradually decreases along the width of the switchyard site 1 as it approaches the low-lying area 12 outside the site, so as to achieve complete gravity drainage of the ground of the switchyard site 1.
[0024] Combination Figure 1 and Figure 2In the embodiments of this utility model, indoor drainage ditches 7 are provided around the perimeter of the basement 4 of both the relay protection building 2 and the GIS building 3 to drain water from the basement 4. A corridor drainage ditch 8 is provided inside the cable corridor 5 to drain water from the cable corridor 5. A water collection well 9 is also provided in the basement 4 of the GIS building 3 to collect water from the relay protection building 2 and the cable corridor 5.
[0025] By collecting the water in the indoor drainage ditch 7 of the relay protection building 2 into the interior of the cable corridor 5, and then collecting the water in the cable corridor 5 into the water collection well 9 through the corridor drainage ditch 8, the water can be collected in a concentrated manner.
[0026] Combination Figure 2 In this embodiment of the utility model, the cable corridor 5 is arranged underground. The basement 4 of GIS building 3 is higher than the basement 4 of relay protection building 2. The height of the cable corridor 5 gradually decreases as it approaches GIS building 3, so as to achieve gravity drainage of basement 4.
[0027] Combination Figure 1 and Figure 3 In this embodiment of the utility model, a drainage pipe 10 is arranged in the rock and soil mass 13 between the basement 4 of the GIS building 3 and the low-lying area 12 outside the site. The side of the drainage pipe 10 closest to the GIS building 3 is located in the water collection well 9. The height of the drainage pipe 10 gradually decreases as it approaches the low-lying area 12 outside the site. Gravity gravity drainage is achieved through the drainage pipe 10, without the need for pumping.
[0028] The seepage water collected in the collection well 9 is eventually discharged by gravity through the drainage pipe 10 connected to the collection well 9. It does not require pumping, is safe and reliable, does not require personnel to be on duty, and saves the pumping equipment and pumping operation and maintenance costs.
[0029] Example 2: Reference Figure 3 To address the issue of easy blockage inside the drain pipe 10, the inlet of the drain pipe 10 inside the water collection well 9 is higher than the bottom plate of the water collection well 9. A grate 11 is installed on the side of the drain pipe 10 near the water collection well 9. The size of the grate 11 matches the diameter of the drain pipe 10. The grate 11 prevents dirt from clogging the drain pipe 10.
[0030] The bottom space of the water collection well 9 is used as a sedimentation space for sewage. At the same time, the orifice grate 11 intercepts and filters large-volume sewage to prevent sewage from entering the interior of the drain pipe 10 and clogging the drain pipe 10, thereby affecting the normal drainage in the later stage.
[0031] Combination Figure 3In the embodiments of this utility model, there are no fewer than two drain pipes 10, which serve as backups for each other. The diameter of the drain pipe 10 is not less than 100mm. The drain pipe 10 is made of stainless steel or cast iron to improve its corrosion resistance.
[0032] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments, which is intended to enable those skilled in the art to understand and apply the present invention. However, it should not be assumed that the specific implementation of the present invention is limited to these descriptions.
Claims
1. A full gravity drainage structure for a switchyard, comprising a switchyard site (1), characterized in that, The top of the switchyard site (1) is equipped with a relay protection building (2) and a GIS building (3). The bottom of the relay protection building (2) and the GIS building (3) are equipped with a basement (4) for cable laying. The two basements (4) are connected by a cable corridor (5). The outer perimeter of the switchyard site (1) is equipped with a site drainage ditch (6). The inner perimeter of the basement (4) is equipped with an indoor drainage ditch (7). The inside of the cable corridor (5) is equipped with a corridor drainage ditch (8). The basement (4) of the GIS building (3) is also equipped with a water collection well (9).
2. A full gravity drainage structure for a switchyard according to claim 1, characterized in that, The cable corridor (5) is arranged underground. The basement (4) of the GIS building (3) is higher than the basement (4) of the relay protection building (2). The height of the cable corridor (5) gradually decreases as it gets closer to the GIS building (3).
3. The fully gravity-fed drainage structure for a switchyard according to claim 1, characterized in that, It also includes the low-lying area outside the site (12), the basement (4) of the GIS building (3) and the rock and soil mass (13) between the low-lying area outside the site (12) to which the drainage pipe (10) is arranged. The side of the drainage pipe (10) closest to the GIS building (3) is located in the water collection well (9), and the height of the drainage pipe (10) gradually decreases as it gets closer to the low-lying area outside the site (12).
4. The fully gravity-fed drainage structure for a switchyard according to claim 3, characterized in that, There shall be no fewer than two drain pipes (10).
5. A fully gravity-fed drainage structure for a switchyard according to claim 3, characterized in that, The inlet of the drain pipe (10) is higher than the bottom plate of the water collection well (9), and an orifice grate (11) is provided on the side of the drain pipe (10) near the water collection well (9).
6. The fully gravity-fed drainage structure for a switchyard according to claim 3, characterized in that, The height of the site drainage ditch (6) gradually decreases from the middle to both sides along the length of the switchyard site (1), and the height of the site drainage ditch (6) gradually decreases along the width of the switchyard site (1) as it approaches the low-lying area (12) outside the site.