Device for draining water and preventing air backflow
By designing a drainage device for railway roadbed, the square hole and hole cover structure on the middle partition plate is used to solve the problem of air return in the prior art, the smooth passage of water flow and the prevention of air return, and the drainage effect and operational safety of railway roadbed are improved.
Patent Information
- Application Number
- CN202422491901.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The existing railway subgrade drainage facilities are prone to air return during the drainage process, which increases the difficulty of railway maintenance.
A device including a box, a water inlet pipe, a water outlet pipe and a middle partition plate is designed to ensure smooth passage of water flow while preventing air from flowing back.
The device effectively ensures the smooth passage of water flow, while preventing air return, solving the problem of air return, and improving the drainage effect and operational safety of railway subgrade.
Smart Images
Figure CN222990704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drainage and prevention of air backflow in railway subgrades. Background Art
[0002] During the normal operation of railway projects, a large water content can cause some diseases to railway subgrades. Therefore, it is necessary to drain excessive water in a timely manner. For example, due to excessive water content in the subgrade, the bearing capacity of the subgrade will decrease, and problems such as frost heaving of the subgrade in winter will occur, which has a great impact on the operation safety of railways.
[0003] At present, there are relatively many methods and facilities for draining water from the subgrade to the outside, and good drainage effects have also been achieved. However, for some drainage facilities, although water can be drained, during the process of water drainage, since air enters the subgrade along the drainage pipeline, other problems will instead occur, increasing the difficulty of railway maintenance. And for preventing air backflow in drainage facilities, installing a drainage and air backflow prevention device at the end of the drainage facility is the most convenient and effective. Therefore, a device for drainage and prevention of air backflow is urgently needed on site. Summary of the Invention
[0004] The purpose of the utility model is to provide a device that can be used for drainage and prevention of air backflow.
[0005] The utility model is a device for drainage and prevention of air backflow, including a box body 1, a water inlet pipe 2, a water outlet pipe 3, and an intermediate partition 4. The box body 1 is a cubic shell, the top is a box cover 1-1, the box cover 1-1 is connected to the box body 1 at a rotating shaft A 5, and a square hole 4-1 is opened in the middle of the intermediate partition 4.
[0006] The beneficial effects of the utility model are as follows: The drainage and air backflow prevention device can ensure the smooth passage of water flow, and at the same time block the air backflow channel along the device, thus achieving the purpose of preventing air backflow. The structural form of the utility model is relatively simple, with strong practicability and remarkable economic benefits. Brief Description of the Drawings
[0007] Figure 1 is a three-dimensional view of the drainage and air backflow prevention device with the box cover not opened, Figure 2 is a three-dimensional view of the drainage and air backflow prevention device with the box cover opened, Figure 3 is a sectional view taken along line I-I (device sectional view), Figure 4 is a schematic diagram of the water flow channel, Figure 5 is a schematic diagram of the opening and limiting of the hole cover, Figure 6 is a top view of the intermediate partition when the hole cover is closed. Detailed Description of the Invention
[0008] As Figures 1 to 3As shown in the figure, the device for draining water and preventing air backflow of the present utility model includes a box body 1, a water inlet pipe 2, a water outlet pipe 3, and an intermediate partition 4. The box body 1 is a cubic shell with a box cover 1-1 at the top. The box cover 1-1 is connected to the box body 1 at the rotation axis A 5, and the box cover 1-1 can rotate around the rotation axis A 5 to open, so as to facilitate inspection and cleaning inside the box. A square hole 4-1 is opened in the middle of the intermediate partition 4.
[0009] As Figure 3 shown Figure 4 in the figure, the intermediate partition 4 is located in the middle of the height of the box body 1, dividing the space inside the box body 1 into an upper chamber 1-2 and a lower chamber 1-3; a square hole 4-1 is opened in the middle of the intermediate partition 4, and there is a hole cover 4-2 above the square hole 4-1. The hole cover 4-2 is connected to the intermediate partition 4 at the rotation axis B 6, and the hole cover 4-2 can rotate around the rotation axis B 6 to open the square hole, and water can overflow from the square hole 4-1.
[0010] As Figure 4 shown
[0011] in the figure, one end of the water inlet pipe 2 is connected to the external drain pipe 7, and the other end is connected to the lower chamber 1-3 of the box body 1, and the height of the top of the water inlet pipe 2 is below the height of the intermediate partition 4; after the lower chamber 1-3 is filled with water from the water inlet pipe 2, the water pushes open the hole cover 4-2 on the square hole 4-1 under the buoyancy force and overflows into the upper chamber 1-2, and then drains out along the water outlet pipe 3. Figure 3 and Figure 4 shown
[0012] in the figure, one end of the water outlet pipe 3 is connected to the upper chamber 1-2, and the other end is used to drain water out. The height of the bottom of the water outlet pipe 3 is higher than the height of the intermediate partition 4 to keep a certain amount of water on the intermediate partition 4 under normal circumstances, so as to better seal the square hole 4-1 of the intermediate partition 4 and prevent air from flowing back into the water inlet pipe 2 along the square hole 4-1. When there is no water in the upper chamber 1-2, the hole cover 4-2 covers the square hole 4-1, which also plays a role in preventing air backflow.
[0012] The drainage volume of the square hole 4-1 V 1 is twice the drainage volume of the water inlet pipe 2 V i.e. V 1 = 2 V 2 to prevent the phenomenon of drainage blockage at the square hole 4-1. The drainage volume of the water outlet pipe 3 V 3 is not less than the drainage volume of the water inlet pipe 2 V i.e. V 3 ≥V 2 to prevent the phenomenon that the water in the box body 1 cannot be effectively drained, resulting in the box cover 1-1 being pushed open by water.
[0013] As Figure 5 shown Figure 6As shown, a limiter 8 is provided behind the rotating shaft B 6 of the hole cover 4-2. The limiter 8 is mainly used to limit the opening angle of the hole cover 4-2 α ; to prevent the angle α from opening too large and causing the hole cover 4-2 to flip to the other side, resulting in the hole cover 4-2 being unable to cover the square hole 4-1.
Claims
1. A device for draining water and preventing air backflow, comprising a housing (1), a water inlet pipe (2), a water outlet pipe (3), and a middle partition (4), characterized in that The box body (1) is a cubic shell, the top of which is a box cover (1-1), the box cover (1-1) is connected to the box body (1) at a rotation axis A (5), and a square hole (4-1) is opened in the middle of the middle partition (4); one end of the water inlet pipe (2) is connected to an external drainage pipe (7), and the other end is connected to a lower box chamber (1-3) of the box body (1), and the top height of the water inlet pipe (2) is below the height of the middle partition (4); one end of the water outlet pipe (3) is connected to the upper box chamber (1-2), and the other end is used to discharge water outward; the bottom height of the water outlet pipe (3) is higher than the height of the middle partition (4).
2. The device for draining water and preventing air backflow according to claim 1, characterized in that The middle partition (4) is located in the middle of the height of the box body (1), dividing the space in the box body (1) into an upper box chamber (1-2) and a lower box chamber (1-3); a hole cover (4-2) is provided above the square hole (4-1), and the hole cover (4-2) is connected to the middle partition (4) at a rotation axis B (6).
3. The device for draining water and preventing air backflow according to claim 1, characterized in that The drainage volume V1 of the square hole (4-1) is twice the drainage volume V2 of the water inlet pipe (2), that is, V1=2V2; the drainage volume V3 of the water outlet pipe (3) is not less than the drainage volume V2 of the water inlet pipe (2), that is, V3≥V2; and a limiter (8) is arranged behind the rotating shaft B (6) of the hole cover (4-2).