A valve for preventing seawater backflow and an outlet structure for a seawater discharge pipeline

Abstract

This utility model relates to a seawater backflow prevention valve and a seawater discharge pipeline outlet structure. The seawater backflow prevention valve includes an installation sleeve, a rotating shaft, and a movable baffle. The movable baffle is inclinedly disposed within the inner cavity of the installation sleeve and can block the inner cavity of the installation sleeve. The movable baffle is connected to the inner wall of the installation sleeve via the rotating shaft, which is horizontally positioned, and the distance from the rotating shaft to the upper edge of the movable baffle is less than the distance from the rotating shaft to the lower edge of the movable baffle. The seawater discharge pipeline outlet structure includes the seawater discharge pipeline body and the aforementioned seawater backflow prevention valve. The installation sleeve is connected within the inner cavity of the seawater discharge pipeline body and is located at the outlet position of the seawater discharge pipeline body. The outer wall of the installation sleeve is in close contact with the inner wall of the seawater discharge pipeline body. The lower edge of the movable baffle is positioned near the outlet of the seawater discharge pipeline body. This utility model can reliably prevent seawater backflow, and it has a simple structure and is convenient to manufacture, install, and maintain.

Description

Technical Field

[0001] This utility model relates to the field of municipal pipeline technology, specifically to a valve for preventing seawater backflow and an outlet structure for a seawater discharge pipeline. Background Technology

[0002] Coastal cities typically collect rainwater before discharging it into the sea. Currently, to prevent seawater from flowing back into the discharge pipelines, the common practice is to install interceptor wells at the end of the pipelines. However, interceptor wells are relatively more complex in structure, more expensive, and require regular maintenance with shorter maintenance cycles. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a valve for preventing seawater backflow and an outlet structure for a seawater discharge pipeline, which has a simple structure and is convenient to manufacture, install and maintain.

[0004] To achieve the above objectives, this utility model discloses a seawater backflow prevention valve, which includes an installation sleeve, a rotating shaft, and a movable baffle. The movable baffle is inclinedly disposed in the inner cavity of the installation sleeve and can block the inner cavity of the installation sleeve. The movable baffle is connected to the inner wall of the installation sleeve through the rotating shaft, which is horizontally disposed, and the distance from the rotating shaft to the upper edge of the movable baffle is less than the distance from the rotating shaft to the lower edge of the movable baffle. The rotating shaft is fixedly connected to the movable baffle, and the rotating shaft is rotatably connected to the inner wall of the mounting sleeve; or, the rotating shaft is fixedly connected to the inner wall of the mounting sleeve, and the rotating shaft is rotatably connected to the movable baffle; or, the rotating shaft is rotatably connected to the movable baffle, and the rotating shaft is rotatably connected to the inner wall of the mounting sleeve.

[0005] If the angle between the length direction of the movable baffle and the length direction of the mounting sleeve is A, then 30°≤A<90°.

[0006] This utility model also discloses a discharge pipeline outlet structure, which includes a discharge pipeline body and the aforementioned anti-seawater backflow valve. The installation sleeve is connected to the inner cavity of the discharge pipeline body and is located at the outlet position of the discharge pipeline body. The outer wall of the installation sleeve is in close contact with the inner wall of the discharge pipeline body. The lower edge of the movable baffle is located near the outlet of the discharge pipeline body.

[0007] The main body of the discharge pipeline is welded and fixed to the installation sleeve; or, the main body of the discharge pipeline is used as the installation sleeve.

[0008] The rotating shaft is located on the side of the movable baffle near the outlet of the main body of the discharge pipeline.

[0009] The pipe opening of the installation sleeve near the outlet of the main body of the discharge pipeline is provided with a retaining edge that matches the limiting position of the outlet of the main body of the discharge pipeline.

[0010] With the above solution, because the distance from the rotating shaft to the upper edge of the movable baffle is less than the distance from the rotating shaft to the lower edge of the movable baffle, and the lower edge of the movable baffle is located close to the outlet of the drainage pipe body, rainwater can easily push open the movable baffle and be discharged into the sea. When seawater surges back, the water pressure can push the movable baffle to close the valve, preventing backflow. Even if the outlet of the drainage pipe body is submerged in seawater, the valve can still be kept closed due to the difference in lever arm, ensuring high reliability. In addition, this utility model also has the advantages of simple structure and convenient manufacturing, installation, and maintenance. Attached Figure Description

[0011] Figure 1 A schematic diagram of a valve to prevent seawater backflow; Figure 2 Perspective view of the valve to prevent seawater backflow; Figure 3 A cross-sectional view of a valve designed to prevent seawater backflow; Figure 4 This is a cross-sectional view of the present invention.

[0012] Note: Figure 3 and Figure 4 The arrows in the image indicate the direction of the rainwater flow.

[0013] Explanation of key figure labels: 1. Drainage pipeline body, 2. Installation sleeve, 3. Rotary shaft, 4. Movable baffle, 5. Edge guard. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0015] like Figure 1-4 As shown, this utility model discloses a discharge pipeline outlet structure, which includes a discharge pipeline body 1 and a seawater backflow prevention valve.

[0016] The anti-seawater backflow valve includes an installation sleeve 2, a rotating shaft 3, and a movable baffle 4. The movable baffle 4 is connected to the inner cavity of the installation sleeve 2 via the rotating shaft 3. The rotating shaft 3 and the movable baffle 4 can be fixedly connected (or integrally formed), and the rotating shaft 3 is rotatably connected to the inner wall of the installation sleeve 2. Alternatively, the rotating shaft 3 is fixedly connected to the inner wall of the installation sleeve 2, and the rotating shaft 3 is rotatably connected to the movable baffle 4. As another alternative, the rotating shaft 3 is rotatably connected to the movable baffle 4, and at the same time, the rotating shaft 3 is also rotatably connected to the inner wall of the installation sleeve 2.

[0017] The movable baffle 4 can block the inner cavity of the mounting sleeve 2. Specifically, the movable baffle 4 is inclined relative to the mounting sleeve 2, meaning that the inner cavity of the mounting sleeve 2 is blocked when the movable baffle 4 is inclined relative to the mounting sleeve 2. Preferably, the angle between the length direction of the movable baffle 4 and the length direction of the mounting sleeve 2 is defined as A, then 30° ≤ A < 90°. Furthermore, in this design, the rotating shaft 3 is required to be horizontally positioned, and the distance L1 from the rotating shaft 3 to the upper edge of the movable baffle 4 is less than the distance L2 from the rotating shaft 3 to the lower edge of the movable baffle 4. In this way, under normal conditions (without external force acting on the movable baffle 4), the movable baffle 4 can close the mounting sleeve 2.

[0018] The installation sleeve 2 is fixedly connected to the inner cavity of the main body 1 of the discharge pipeline, thus achieving a concealed design for the anti-seawater backflow valve. Ideally, the installation sleeve 2 should be located at the outlet of the main body 1 of the discharge pipeline to prevent seawater from entering. Furthermore, the outer wall of the installation sleeve 2 should fit snugly against the inner wall of the main body 1 of the discharge pipeline to ensure the anti-seawater backflow effect. The main body 1 of the discharge pipeline and the installation sleeve 2 can be welded together, facilitating the modification of existing discharge pipeline outlets. For newly constructed discharge pipelines, the main body 1 of the discharge pipeline can also be directly used as the installation sleeve 2 to reduce material costs.

[0019] When in use, the lower edge of the movable baffle 4 should be positioned closer to the outlet of the drainage pipe body 1 than its upper edge to ensure the function of preventing seawater backflow. Additionally, it is preferable that the rotating shaft 3 is located on the side of the movable baffle 4 closest to the outlet of the drainage pipe body 1.

[0020] In addition, a retaining edge 5 is provided at the pipe opening of the sleeve 2 near the outlet of the main body 1 of the discharge pipeline, which is matched with the outlet limit of the main body 1 of the discharge pipeline. The retaining edge 5 can prevent seawater from pushing the anti-seawater backflow valve into the main body 1 of the discharge pipeline, which helps to improve the installation stability of the anti-seawater backflow valve.

[0021] The key to this invention lies in the tilted arrangement of the movable baffle 4, ensuring that the distance from the rotating shaft 3 to the upper edge of the movable baffle 4 is less than the distance from the rotating shaft 3 to the lower edge of the movable baffle 4. Furthermore, the lower edge of the movable baffle 4 is positioned close to the outlet of the drainage pipe body 1. This allows rainwater to easily push open the movable baffle 4 and drain into the sea. When seawater backflows, the water pressure pushes the movable baffle 4 to close the valve, preventing backflow. Even if the outlet of the drainage pipe body 1 is submerged in seawater, the valve remains closed due to the difference in lever arms, ensuring high reliability. In addition, this invention has the advantages of simple structure and ease of manufacturing, installation, and maintenance.

[0022] The above description is merely an embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A valve for preventing seawater backflow, characterized in that: The device includes an installation sleeve, a rotating shaft, and a movable baffle. The movable baffle is inclinedly disposed in the inner cavity of the installation sleeve and can block the inner cavity of the installation sleeve. The movable baffle is connected to the inner wall of the installation sleeve through the rotating shaft, which is horizontally disposed, and the distance from the rotating shaft to the upper edge of the movable baffle is less than the distance from the rotating shaft to the lower edge of the movable baffle.

2. The anti-seawater backflow valve according to claim 1, characterized in that: The rotating shaft is fixedly connected to the movable baffle, and the rotating shaft is rotatably connected to the inner wall of the mounting sleeve; or, the rotating shaft is fixedly connected to the inner wall of the mounting sleeve, and the rotating shaft is rotatably connected to the movable baffle; or, the rotating shaft is rotatably connected to the movable baffle, and the rotating shaft is rotatably connected to the inner wall of the mounting sleeve.

3. The anti-seawater backflow valve according to claim 1, characterized in that: If the angle between the length direction of the movable baffle and the length direction of the mounting sleeve is A, then 30°≤A<90°.

4. A discharge structure for a sea-drainage pipeline, characterized in that: The system includes a drainage pipeline body and a seawater backflow prevention valve as described in any one of claims 1-3. The installation sleeve is connected to the inner cavity of the drainage pipeline body and is located at the outlet of the drainage pipeline body. The outer wall of the installation sleeve is in contact with the inner wall of the drainage pipeline body. The lower edge of the movable baffle is located near the outlet of the drainage pipeline body.

5. The outlet structure of a discharge pipeline according to claim 4, characterized in that: The main body of the discharge pipeline is welded and fixed to the installation sleeve; or, the main body of the discharge pipeline is used as the installation sleeve.

6. The outlet structure of a sea discharge pipeline according to claim 4, characterized in that: The rotating shaft is located on the side of the movable baffle near the outlet of the main body of the discharge pipeline.

7. The outlet structure of a sea discharge pipeline according to claim 4, characterized in that: The pipe opening of the installation sleeve near the outlet of the main body of the discharge pipeline is provided with a retaining edge that matches the limiting position of the outlet of the main body of the discharge pipeline.

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