A rapid drainage structure and construction method for emergency drainage of a hydropower station underground powerhouse

Abstract

The application provides a quick drainage structure and construction method for emergency drainage of a hydropower station underground powerhouse, which comprises a pre-embedded pipe pre-set in a floor, an emergency drainage pipe is fixed in the center of the pre-embedded pipe through pouring of a pouring structure, the top end of the emergency drainage pipe and the pouring structure adopts a recessed structure, and the water inlet of the emergency drainage pipe is located in the center of the recessed structure; and a drainage hose is connected to the bottom end of the emergency drainage pipe. The structure effectively utilizes the pre-embedded pipe of the existing underground powerhouse to implement a quick emergency drainage structure, can effectively perform emergency drainage treatment on unknown water sources, achieves the purpose of organized discharge, guarantees safe operation of power generation equipment and plays a role in improving the environment.

Description

Technical Field

[0001] This invention relates to the field of wiring devices, and more specifically to a rapid drainage structure and construction method for emergency drainage in underground powerhouses of hydropower stations. Background Technology

[0002] Hydropower stations are designed with drainage ditches and pipes in their underground powerhouses for organized drainage. However, after the generating units are put into operation, there may be some unpredictable water sources, such as bedrock seepage or equipment condensate. If these unidentified water sources are not discharged through existing drainage facilities, they can affect the safe operation of the power generation equipment, necessitating emergency drainage. Summary of the Invention

[0003] To address the above technical problems, this invention provides a rapid drainage structure and construction method for emergency drainage in underground powerhouses of hydropower stations. This structure effectively utilizes existing pre-buried pipes in the underground powerhouse to implement a rapid emergency drainage system, which can effectively divert and treat unknown water sources in emergencies, achieving the purpose of organized discharge, ensuring the safe operation of power generation equipment, and improving the environment.

[0004] To achieve the above-mentioned technical features, the present invention aims to provide a rapid drainage structure for emergency drainage in underground powerhouses of hydropower stations. This structure includes a pre-embedded pipe embedded within the floor slab. An emergency drainage pipe is cast and fixed to the center of the pre-embedded pipe via a casting structure. The top of the emergency drainage pipe and the casting structure are recessed, with the inlet of the emergency drainage pipe located at the center of the recessed structure. A drainage hose is connected to the bottom of the emergency drainage pipe.

[0005] The embedded pipe runs through the entire floor slab.

[0006] The emergency drainage pipe is made by cutting rigid pipe material.

[0007] The lowest point of the recessed structure is 2-3 cm above the ground.

[0008] The emergency drainage pipe is pre-fixed inside the pre-buried pipe by means of a plug structure.

[0009] A maintenance space is reserved between the bottom end of the plug structure and the bottom end of the embedded pipe.

[0010] The plug structure is formed by wrapping a flexible material around the outer wall of the emergency drainage pipe.

[0011] The casting structure is constructed by layered casting, including a first backfill casting layer and a second backfill casting layer.

[0012] The thickness of the first backfill layer is less than the thickness of the second backfill layer.

[0013] A construction method for a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station includes the following steps:

[0014] Step 1, Installation of the plug structure:

[0015] Flexible material is wrapped around the emergency drainage pipe at a certain distance from the port to form a plug structure;

[0016] Step 2, Installation of the drain hose:

[0017] A drainage hose is connected to the bottom of the emergency drainage pipe. The drainage hose passes through the pre-buried pipe and is lowered to the designated location, thereby achieving the purpose of diverting unknown water sources to the designated location through the emergency drainage pipe, and avoiding its unorganized discharge from affecting the safe operation of power generation equipment.

[0018] Step 3, initial fixing of the emergency drainage pipe inside the pre-buried pipe:

[0019] Insert the end of the emergency drainage pipe with the plug structure into the interior of the pre-buried pipe, and ensure that the emergency drainage pipe is located in the center of the pre-buried pipe;

[0020] Step 4, pouring the first backfill layer:

[0021] Quick-setting cement is poured into the cavity structure formed by the plug structure, emergency drainage pipe and pre-embedded pipe to form the first backfill layer. The thickness of the first backfill layer should be controlled to prevent the plug structure from being pressed down and detached from the pre-embedded pipe.

[0022] Step 5, pouring the second backfill layer:

[0023] After the first backfill layer has solidified, quick-setting cement will be used to pour the second backfill layer.

[0024] Step 6, Grinding treatment of the second backfill layer and the top of the emergency drainage pipe:

[0025] After the second backfill layer has solidified, the second backfill layer and the top of the emergency drainage pipe are cut and ground with a grinding machine to form a concave structure.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The present invention is a rapid emergency drainage structure that effectively utilizes existing pre-buried pipes in underground power plants. It can effectively divert and treat unknown water sources in emergencies, achieve the purpose of organized discharge, ensure the safe operation of power generation equipment, and improve the environment.

[0028] 2. The process of this invention is simple and easy to construct, and the entire construction can be completed in just a few steps.

[0029] 3. The present invention is fast and efficient in construction. The quick-setting cement can solidify rapidly, generally within 1 to 2 minutes. It also has high strength and strong adhesion, which can quickly and effectively fix the emergency drainage pipe 2 in a short time to achieve the purpose of emergency treatment.

[0030] 4. The materials used in this invention are all conventional materials, which are simple and easy to obtain, and can greatly improve on-site construction efficiency.

[0031] 5. This invention is effective and reliable, applicable to pre-embedded pipes of different diameters, and easy to dismantle later. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is the main sectional view of the present invention.

[0034] Figure 2 This is a structural diagram of the pre-embedded pipe arrangement of the present invention.

[0035] Figure 3 This is a preliminary structural diagram of the emergency drainage pipe of the present invention, which is fixed inside the pre-embedded pipe.

[0036] Figure 4 This is a diagram of the casting structure of the first backfill layer of the present invention.

[0037] Figure 5 This is a diagram of the casting structure of the second backfill layer of the present invention.

[0038] Figure 6 This is a structural diagram of the recessed structure of the present invention after polishing.

[0039] Figure 7 This is a diagram of the drainage hose connection structure of the present invention.

[0040] In the diagram: 1. Embedded pipe; 2. Emergency drainage pipe; 3. Plug structure; 4. Cast-in-place structure; 5. Recessed structure; 6. Maintenance space; 7. Floor slab; 8. Drainage hose; 9. First backfill layer; 10. Second backfill layer. Detailed Implementation

[0041] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0042] Example 1:

[0043] Please see Figure 1A rapid drainage structure for emergency drainage in underground powerhouses of hydropower stations is disclosed. It includes a pre-embedded pipe 1 embedded within a floor slab 7. An emergency drainage pipe 2 is cast and fixed to the center of the pre-embedded pipe 1 via a casting structure 4. The top of the emergency drainage pipe 2 and the casting structure 4 is recessed into a recessed structure 5, with the inlet of the emergency drainage pipe 2 located at the center of the recessed structure 5. A drainage hose 8 is connected to the bottom of the emergency drainage pipe 2. This structure effectively utilizes existing pre-embedded pipes in the underground powerhouse to implement a rapid emergency drainage system. It can effectively divert and treat unidentified water sources in emergencies, achieving organized discharge, ensuring the safe operation of power generation equipment, and improving the environment. In practice, unidentified water flow inside the powerhouse will be diverted to the recessed structure 5, and then the emergency drainage pipe 2 at the center of the recessed structure 5 will drain the water to a designated location through the drainage hose 8, preventing unorganized discharge from affecting the safe operation of the power generation equipment.

[0044] Furthermore, the pre-embedded pipe 1 penetrates the entire floor slab 7 and is made of PVC pipe cut to size. The aforementioned pre-embedded pipe 1 forms an integral part of the underground powerhouse structure of the hydropower station, thus achieving the effect of convenient and localized utilization.

[0045] Furthermore, the emergency drainage pipe 2 is made of rigid pipe material. This emergency drainage pipe 2 facilitates subsequent emergency drainage.

[0046] Furthermore, the drainage hose 8 is connected and fixed to the bottom end of the emergency drainage pipe 2, and the drainage hose 8 is lowered into the designated location through the pre-buried pipe 1.

[0047] Furthermore, the lowest point of the recessed structure 5 is 2-3 cm above the ground. This recessed structure 5 facilitates the effective collection of water within the water treatment plant, thereby facilitating subsequent drainage.

[0048] Furthermore, the emergency drainage pipe 2 is pre-fixed inside the pre-embedded pipe 1 by means of a plug structure 3. The plug structure 3 enables the emergency drainage pipe 2 to be pre-fixed inside the pre-embedded pipe 1, which facilitates the subsequent complete casting and fixing of the emergency drainage pipe 2 and ensures the reliability of its fixation.

[0049] Furthermore, a maintenance space 6 is reserved between the bottom end of the plug structure 3 and the bottom end of the embedded pipe 1. The aforementioned maintenance space 6 facilitates the subsequent fixing and installation of the drainage hose 8.

[0050] Furthermore, the plug structure 3 is formed by wrapping a flexible material around the outer wall of the emergency drainage pipe 2. This flexible material simplifies the fixing and installation process of the emergency drainage pipe 2 and facilitates its position adjustment. The plug structure 3 also serves as a preliminary support template for the pouring process.

[0051] Furthermore, the casting structure 4 is constructed using a layered casting method, comprising a first backfill casting layer 9 and a second backfill casting layer 10. This layered casting effectively prevents the risk of the emergency drainage pipe 2 detaching during the casting process due to insufficient frictional resistance between the plug structure 3 and the pre-embedded pipe 1.

[0052] Furthermore, the thickness of the first backfill layer 9 is less than the thickness of the second backfill layer 10. This thickness arrangement effectively prevents the risk of the plug structure 3 collapsing during the pouring of the first backfill layer 9. Moreover, the initially solidified first backfill layer 9 provides reliable support for the second backfill layer 10, thus forming the pouring template for the second backfill layer 10.

[0053] Example 2:

[0054] See Figure 2-7 A construction method for a rapid drainage structure used for emergency drainage in underground powerhouses of hydropower stations includes the following steps:

[0055] Step 1, Installation of plug structure 3:

[0056] Flexible material is wrapped around the emergency drainage pipe 2 at a certain distance from the port to form a plug structure 3;

[0057] Step 2, Installation of drain hose 8:

[0058] A drainage hose 8 is connected to the bottom end of the emergency drainage pipe 2. The drainage hose 8 passes through the pre-buried pipe 1 and is lowered to the designated location, thereby achieving the purpose of diverting the unknown water source to the designated location through the emergency drainage pipe 2, so as to avoid its unorganized discharge affecting the safe operation of the power generation equipment.

[0059] Step 3, initial fixing of emergency drainage pipe 2 inside pre-embedded pipe 1:

[0060] Insert one end of the emergency drainage pipe 2 with the plug structure 3 into the interior of the pre-buried pipe 1, and ensure that the emergency drainage pipe 2 is located in the center of the pre-buried pipe 1;

[0061] Step 4, pouring of the first backfill layer 9:

[0062] Quick-setting cement is poured into the cavity structure formed by the plug structure 3, the emergency drainage pipe 2 and the pre-embedded pipe 1 to form the first backfill layer 9. The thickness of the first backfill layer 9 should be controlled to prevent the plug structure 3 from being pressed down and detached from the pre-embedded pipe 1.

[0063] Step 5, pouring of the second backfill layer 10:

[0064] After the first backfill layer 9 has solidified, quick-setting cement will be used to pour the second backfill layer 10.

[0065] Step 6, Grinding treatment of the top of the second backfill layer 10 and the emergency drainage pipe 2:

[0066] After the second backfill layer 10 has solidified, the top of the second backfill layer 10 and the emergency drainage pipe 2 are cut and ground by a grinding machine to form a recessed structure 5.

Claims

1. A construction method for a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station, the rapid drainage structure comprising a pre-embedded pipe (1) pre-installed inside a floor slab (7), an emergency drainage pipe (2) being cast and fixed at the center of the pre-embedded pipe (1) by a casting structure (4), the top of the emergency drainage pipe (2) and the casting structure (4) being recessed (5), and the inlet of the emergency drainage pipe (2) being located at the center of the recessed structure (5); the bottom end of the emergency drainage pipe (2) is connected to a drainage hose (8). Its features are, The construction method includes the following steps: Step 1, Installation of the plug structure (3): A flexible material is wrapped around the emergency drainage pipe (2) at a certain distance from the port to form a plug structure (3). Step 2, Installation of the drain hose (8): A drainage hose (8) is connected to the bottom end of the emergency drainage pipe (2). The drainage hose (8) passes through the pre-buried pipe (1) and is lowered to the designated location, thereby achieving the purpose of diverting the unknown water source to the designated location through the emergency drainage pipe (2) to avoid its unorganized discharge affecting the safe operation of the power generation equipment. Step 3, preliminary fixing of the emergency drainage pipe (2) inside the pre-embedded pipe (1): Insert one end of the emergency drainage pipe (2) with the plug structure (3) into the interior of the pre-buried pipe (1), and ensure that the emergency drainage pipe (2) is located in the center of the pre-buried pipe (1); Step 4, pouring of the first backfill layer (9): Quick-setting cement is poured into the cavity structure formed by the plug structure (3), the emergency drainage pipe (2) and the pre-embedded pipe (1) to form the first backfill pouring layer (9). The pouring thickness of the first backfill pouring layer (9) should be controlled to prevent the plug structure (3) from being pressed down and detached from the pre-embedded pipe (1). Step 5, pouring of the second backfill layer (10): After the first backfill layer (9) has solidified, quick-setting cement is used to pour the second backfill layer (10); Step 6, Grinding treatment of the top of the second backfill layer (10) and the emergency drainage pipe (2): After the second backfill layer (10) solidifies, the top of the second backfill layer (10) and the emergency drainage pipe (2) are cut and ground by a grinding machine to form a concave structure (5).

2. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 1, characterized in that, The embedded pipe (1) runs through the entire floor slab (7).

3. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 1, characterized in that, The emergency drainage pipe (2) is made of rigid pipe material.

4. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 1, characterized in that, The lowest point of the recessed structure (5) is 2-3 cm above the ground.

5. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 1, characterized in that, The emergency drainage pipe (2) is pre-fixed inside the pre-buried pipe (1) by a plug structure (3).

6. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 5, characterized in that, A maintenance space (6) is reserved between the bottom end face of the plug structure (3) and the bottom end of the pre-embedded pipe (1).

7. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 5, characterized in that, The plug structure (3) is formed by wrapping a flexible material around the outer wall of the emergency drainage pipe (2).

8. The construction method of a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station according to claim 1, characterized in that, The casting structure (4) is formed by layered casting, including a first backfill casting layer (9) and a second backfill casting layer (10).

9. A construction method for a rapid drainage structure for emergency drainage in an underground powerhouse of a hydropower station, as described in claim 8, characterized in that, The thickness of the first backfill layer (9) is less than the thickness of the second backfill layer (10).

Images