Anti-siphon device for aerator pipe

Abstract

The utility model discloses an aerator pipe anti-siphon device, and belongs to the technical field of anti-siphon. The device comprises a fixed blocking piece and a movable blocking piece, a connecting rod sleeve is arranged on the fixed blocking piece, a movable connecting rod is arranged on the movable blocking piece, and the movable connecting rod can rotate around the connecting rod sleeve to drive the movable blocking piece to be opened and closed. A sealing gasket and a sealing ring are further arranged in the device, so that the sealing performance of the device is improved. According to the device, wind pressure is generated through the fan, the trend of the wind pressure is controlled through opening and closing of the movable blocking piece, negative pressure is released before the siphoning effect is formed, the purpose of damaging siphoning is achieved, and therefore pool water backward flowing caused by misoperation or abnormal shutdown is prevented. And meanwhile, the device does not occupy the caliber of the pipeline, so that the problem of flow loss of the check valve is avoided. The device is simple in structure, and the problem of backwater siphon generated when the fan is started and stopped is solved through the pressure relief principle.

Description

Technical Field

[0001] The utility model relates to an anti-siphon device for an aeration pipe, which is used for oxygen supply and backwashing of an aeration tank and a biological filter and prevents siphoning caused by start-up and shutdown of a fan; and belongs to the technical field of anti-siphoning. Background Art

[0002] Fans produce a harsh noise due to resonance during operation, so most fans are installed underground to suppress the noise. Installing the fan underground can effectively control the noise, but it also brings a new problem: because the height of the pool is above ground and the height of the fan is underground, the fan is lower than the height of the pool, so siphoning occurs when the fan is started and stopped. Utility Model Content

[0003] In order to solve the problems in the prior art, the purpose of the utility model is to provide an anti-siphon device for an aeration pipe, which cooperates with a fixed baffle and a movable baffle to remove the negative pressure generated instantly when the fan stops, thereby preventing siphoning.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an anti-siphon device for an aeration pipe, which is arranged on a fan pipe, and comprises a fixed baffle and a movable baffle, wherein the fixed baffle is fixed in the anti-siphon pipe, a connecting sleeve is arranged on the fixed baffle, and a movable connecting rod is arranged on the movable baffle; the movable connecting rod is arranged in the connecting sleeve and can rotate in the connecting sleeve;

[0005] Furthermore, a stopper for limiting position is provided in the anti-siphon pipe, a movable stopper cooperates with the stopper, and a sealing gasket is provided on one side where the movable stopper cooperates with the stopper.

[0006] Furthermore, the fixed baffle occupies more than half of the inner area of the anti-siphon pipe.

[0007] Furthermore, a sealing ring is provided at the relative movement position between the movable connecting rod and the connecting rod sleeve.

[0008] Furthermore, the square siphon device is arranged on the fan pipeline.

[0009] The beneficial effects of the present utility model are as follows: the device includes a fixed baffle and a movable baffle, a connecting rod sleeve is provided on the fixed baffle, and a movable connecting rod is provided on the movable baffle, and the movable connecting rod can rotate around the connecting rod sleeve, thereby driving the movable baffle to open and close. The device is also provided with a sealing gasket and a sealing ring to increase the sealing performance of the device. The device generates wind pressure through a fan, controls the direction of wind pressure by opening and closing the movable baffle, and releases negative pressure before the siphon effect is formed to achieve the purpose of destroying the formation of the siphon, thereby preventing the backflow of pool water caused by misoperation or abnormal shutdown. At the same time, the device does not occupy the pipeline diameter, thereby avoiding the problem of flow loss of the check valve. The device has a simple structure and solves the problem of backwater siphoning caused by the start and stop of the fan through the pressure relief principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a structural diagram of an aeration pipe anti-siphon device.

[0011] Figure 2 The present invention is a schematic diagram of the working process of an aeration pipe anti-siphon device.

[0012] Figure 3 The present invention is a structural diagram of an aeration pipe anti-siphon device.

[0013] In the figure, 1. fan pipeline, 2. anti-siphon pipe, 3. fixed baffle, 4. movable baffle, 5. movable connecting rod, 6. connecting rod sleeve, 7. baffle, 8. sealing gasket, 9. sealing ring. DETAILED DESCRIPTION

[0014] The present invention will be described below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 The present invention shows an anti-siphon device for an aeration pipe, which is installed on a fan pipe 1 and includes a fixed baffle 3 and a movable baffle 4. The fixed baffle 3 is fixed in the anti-siphon pipe 2, and a connecting sleeve 6 is provided on the fixed baffle 3. The movable baffle 4 is provided with a movable connecting rod 5. The movable connecting rod 5 is arranged in the connecting sleeve 6 and can rotate within the connecting sleeve 6. A stopper 7 for limiting the position is also provided in the anti-siphon pipe 2. The movable baffle 4 cooperates with the stopper 7, and a sealing gasket 8 is provided on one side of the movable baffle 4 and the stopper 7. The movable baffle 4 opens or closes according to the pressure in the pipe. When the pressure in the pipe is positive, the movable baffle 4 opens outward and abuts against the stopper 7. When the pressure in the pipe is negative, the movable baffle 4 opens inward, sucking external air into the pipe, relieving the negative pressure and preventing siphoning.

[0016] In some embodiments, the fixed baffle 3 occupies more than half of the inner area of the anti-siphon tube 2 . Figure 1 The area of the fixed baffle 2 occupies half of the area of the siphon tube 2. Figure 3 The area of the middle fixed baffle 2 exceeds half of the area of the siphon tube 2 .

[0017] In some embodiments, a sealing ring 9 is provided at the relative movement position between the movable connecting rod 5 and the connecting rod sleeve 6 to further enhance the sealing performance of the anti-siphon device.

[0018] In some embodiments, the square siphon device is provided on the fan pipeline 1 .

[0019] Installation of the device: After cutting the existing pipeline, weld the flange and connect the anti-siphon device. Select the place above the elbow on the aeration pipeline to cut, punch a hole according to the diameter of the anti-siphon pipe, and weld the flange of the corresponding diameter to connect it to the device.

[0020] When the above technical solution is used, Figure 2 As shown in Figure a, when the fan is started, strong air pressure fills the fan pipe 1, and the airflow will find the device as an outlet. The strong airflow will blow the movable baffle 4 to close it. Until the movable baffle 4 acts on the baffle 7, the airflow will turn to aerate the water. Figure 2 As shown in Figure b, when the fan stops, the air pressure drops instantly, creating a negative pressure, causing a large amount of water to flow into the fan duct 1, forming a siphon. Before the air pressure drops and a siphon forms, the device automatically opens the movable baffle 4, allowing external air pressure to enter the fan duct 1, breaking the siphon.

[0021] In addition, for different fan pressures, the connecting rod limit and the hinge opening and closing degree can be manually adjusted to cope with different fan air volumes.

[0022] The device generates wind pressure through a fan and controls the direction of wind pressure by opening and closing movable baffles, releasing negative pressure before the siphon effect is formed to achieve the purpose of destroying the formation of the siphon, thereby preventing the backflow of pool water caused by misoperation or abnormal shutdown.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-siphon device for an aeration pipe, which is arranged on a fan pipe (1), and is characterized by: The device comprises a fixed baffle (3) and a movable baffle (4), wherein the fixed baffle (3) is fixed in the anti-siphon pipe (2), a connecting sleeve (6) is provided on the fixed baffle (3), and a movable connecting rod (5) is provided on the movable baffle (4); the movable connecting rod (5) is provided in the connecting sleeve (6) and can rotate in the connecting sleeve (6); A stopper (7) for limiting position is also provided in the anti-siphon pipe (2), the movable stopper (4) cooperates with the stopper (7), and a sealing gasket (8) is provided on one side where the movable stopper (4) cooperates with the stopper (7).

2. The aeration pipe anti-siphon device according to claim 1, characterized in that: The fixed baffle (3) occupies more than half of the inner area of the anti-siphon tube (2).

3. The aeration pipe anti-siphon device according to claim 1, characterized in that: A sealing ring (9) is provided at the relative motion position between the movable connecting rod (5) and the connecting sleeve (6).

4. The aeration pipe anti-siphon device according to claim 1, characterized in that: The anti-siphon device is arranged on the fan pipeline (1).

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