Device for preventing gas washing pipeline liquid from flowing back

Abstract

The utility model discloses a device for preventing gas washing pipeline liquid from flowing back, which belongs to the technical field of backwashing devices and comprises a main gas inlet pipe, the main gas inlet pipe is connected with a pump set, the other end of the pump set is connected with an upper gas pipe, and the other end of the upper gas pipe is connected with a plurality of branch gas inlet pipes; one end of the branch air inlet pipe is connected with the backwashing filter through a three-way pipeline, and the other end is connected with the branch air outlet pipe; the other end of the branch air outlet pipe is connected with an exhaust pipe; the other end of the exhaust pipe is connected with a main air outlet pipe; an anti-backflow valve is arranged on the branch air inlet pipe on the left side of the branch air outlet pipe, an electromagnetic valve and a water flow sensor are arranged on the branch air inlet pipe on the left side and the right side of the branch air outlet pipe, and the water flow sensor is close to one side of the backwashing filter. The device for preventing the gas washing pipeline liquid from flowing back can effectively detect whether water flows back in the branch gas inlet pipe or not, the pipeline is closed in time, and safe and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of backwashing devices, in particular to a device for preventing liquid backflow in an air-washing pipeline. Background Art

[0002] Backwashing is a crucial step in seawater desalination systems. Backwashing is often combined with surface flushing or air washing to improve flushing efficiency. Air-water backwashing involves forcing compressed air into the filter tank, utilizing the vibration and scrubbing effects of rising air bubbles to remove impurities attached to the filter media surface and suspend them in the water. Water is then used to backwash the impurities out of the tank. However, the negative pressure generated within the backwash air pipeline can cause water within the filter tank to flow back into equipment such as fans and pumps, damaging the equipment. Based on this, the present invention proposes a device to prevent liquid backflow in the air wash pipeline. Utility Model Content

[0003] The purpose of the utility model is to provide a device for preventing liquid backflow in an air washing pipeline, so as to solve the above-mentioned problem.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The utility model discloses a device for preventing liquid backflow in an air washing pipeline, comprising a main air inlet pipe, the main air inlet pipe being connected to a pump group, the other end of the pump group being connected to an upper air pipe, the other end of the upper air pipe being connected to a plurality of branch air inlet pipes; one end of the branch air inlet pipe is connected to a backwash filter through a three-way pipe, and the other end is connected to a branch air outlet pipe; the other end of the branch air outlet pipe is connected to an exhaust pipe, and the other end of the exhaust pipe is connected to the main air outlet pipe; an anti-backflow valve is provided on the branch air inlet pipe at a position on the left side of the branch air outlet pipe, and an electromagnetic valve and a water flow sensor are provided on the branch air inlet pipe at positions on the left and right sides of the branch air outlet pipe, and the water flow sensor is close to one side of the backwash filter.

[0006] Furthermore, the anti-backflow valve includes a valve body, a valve disc is provided in the valve body, a valve core is provided at the upper end of the valve disc, a valve cover is provided on the top of the valve body, the valve core is slidably connected to the guide plate after passing through the valve cover, a cylinder is provided on the top of the guide plate, and the telescopic end of the cylinder is fixedly connected to the valve core; a water level probe is provided at the water inlet of the valve body on one side of the branch air pipe.

[0007] Furthermore, the valve core and the valve cover are slidably connected together.

[0008] Furthermore, the backwash filter is connected to a water inlet pipe through a pipeline, and a check valve is provided at the front end of the water inlet pipe.

[0009] Furthermore, the backwash filter is connected to the backwash pipe via a pipeline, and the pipeline connecting the backwash filter and the backwash pipe is connected to the branch air inlet pipe.

[0010] Furthermore, the anti-backflow valve, solenoid valve and water flow sensor are all electrically connected to the control cabinet.

[0011] Furthermore, the pump group is located in a pump room, and the backwash filter is located in a filter room.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are:

[0013] The utility model's device for preventing liquid backflow in the air washing pipeline can detect whether there is water flow in the branch air intake pipe through a water flow sensor. If there is, the solenoid valve will close the channel to prevent water from flowing back into the branch air intake pipe and affecting the normal operation of the pump group equipment. In addition, there is an anti-backflow valve on the branch air intake pipe, which is also used to detect water flow and close the pipe, achieving double insurance for the branch air intake pipe and effectively ensuring the normal operation of the equipment. In short, the utility model's device for preventing liquid backflow in the air washing pipeline can effectively detect whether there is water backflow in the branch air intake pipe and close the pipe in time, ensuring the safe and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 1 This is a front view of the device for preventing liquid backflow in the air washing pipeline according to the utility model;

[0016] Figure 2 This is a partial structural diagram of the device for preventing liquid backflow in the air washing pipeline according to the utility model;

[0017] Figure 3 This is a cross-sectional view of the anti-backflow valve;

[0018] Figure 4 This is a schematic diagram of the local structure of the anti-backflow valve;

[0019] Explanation of reference numerals: 1, main air inlet pipe; 2, pump unit; 3, upper air pipe; 4, branch air inlet pipe; 5, water inlet pipe; 6, backwash pipe; 7, exhaust pipe; 8, main air outlet pipe; 9, check valve; 10, branch air outlet pipe; 11, anti-backflow valve; 12, solenoid valve; 13, water flow sensor;

[0020] 1101. Valve body; 1102. Valve disc; 1103. Valve core; 1104. Valve cover; 1105. Guide plate; 1106. Cylinder; 1107. Water level probe. DETAILED DESCRIPTION

[0021] like Figure 1 、 2As shown, a device for preventing liquid backflow in an air-washing pipeline comprises a main air inlet pipe 1, the main air inlet pipe 1 being connected to a pump group 2, the other end of the pump group 2 being connected to an upper air pipe 3, the other end of the upper air pipe 3 being connected to a plurality of branch air inlet pipes 4; the branch air inlet pipe 4 being connected to a backwash filter at one end through a three-way pipe, and to a branch air outlet pipe 10 at the other end. The other end of the branch air outlet pipe 10 is connected to an exhaust pipe 7, the other end of the exhaust pipe 7 being connected to the main air outlet pipe 8. An anti-backflow valve 11 is installed on the branch air inlet pipe 4 on the left side of the branch air outlet pipe 10, and an electromagnetic valve 12 and a water flow sensor 13 are installed on the branch air inlet pipe 4 on the left and right sides of the branch air outlet pipe 10, the water flow sensor 13 being close to one side of the backwash filter. The anti-backflow valve 11, the electromagnetic valve 12 and the water flow sensor 13 are all electrically connected to a control cabinet.

[0022] Specifically, when the water flow sensor 13 senses the water flow, it outputs a pulse signal or current, voltage and other signals by sensing the water flow, and transmits the signal to the control cabinet. The control cabinet controls the solenoid valve 12 to close to prevent water from flowing back. This is the first anti-backflow device.

[0023] like Figure 3 、 4 As shown, the backflow prevention valve 11 includes a valve body 1101, a valve disc 1102 is installed in the valve body 1101, a valve core 1103 is installed on the upper end of the valve disc 1102, and a valve cover 1104 is installed on the top of the valve body 1101. The valve core 1103 passes through the valve cover 1104 and is slidably connected to a guide plate 1105. The valve core 1103 and the valve cover 1104 are slidably connected together. A cylinder 1106 is installed on the top of the guide plate 1105, and the telescopic end of the cylinder 1106 is fixedly connected to the valve core 1103. A water level probe 1107 is installed at the water inlet of the valve body 1101 on one side of the branch outlet pipe 10. Specifically, when water flows back in the branch air inlet pipe 4, it first passes through the water level probe 1107, and the water level probe 1107 transmits the signal to the control cabinet. The control cabinet controls the cylinder 1106 to start, pushing the valve core 1103 to move downward, and then the valve flap 1102 seals the water flow channel to prevent water from flowing through. This is the second anti-backflow device. The setting of the two anti-backflow devices achieves a double insurance effect.

[0024] The backwash filter is connected to the water inlet pipe 5 through a pipeline. A check valve 9 is installed at the front end of the water inlet pipe 5. The check valve 9 can effectively prevent water from flowing back due to negative pressure in the water inlet pipe 5.

[0025] The backwash filter is connected to the backwash pipe 6 through a pipeline, and the pipeline connecting the backwash filter and the backwash pipe 6 is connected to the branch air inlet pipe 4, providing a strong condition for air-water backwashing during backwashing.

[0026] The pump group 2 is located in the pump room, and the backwash filter is located in the filter room. The two are separated to facilitate management and maintenance.

[0027] The action process of this utility model is as follows:

[0028] First, when the water flow sensor 13 senses the water flow, it outputs a pulse signal or current, voltage or other signals by sensing the water flow, and transmits the signal to the control cabinet, which controls the solenoid valve 12 to close to prevent the water from flowing back. This is the first anti-backflow device;

[0029] Then, once the first anti-backflow device fails to completely prevent the water flow, when the water flows back, it will first pass through the water level probe 1107. The water level probe 1107 transmits the signal to the control cabinet. The control cabinet controls the cylinder 1106 to start, pushing the valve core 1103 to move downward, and then the valve flap 1102 seals the water flow channel to prevent water from flowing through. This is the second anti-backflow device. The setting of the two anti-backflow devices achieves a double insurance effect.

[0030] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A device for preventing liquid backflow in an air washing pipeline, characterized in that: The invention comprises a main air inlet pipe (1), wherein the main air inlet pipe (1) is connected to a pump group (2), the other end of the pump group (2) is connected to an upper air pipe (3), and the other end of the upper air pipe (3) is connected to a plurality of branch air inlet pipes (4); one end of the branch air inlet pipe (4) is connected to a backwash filter through a three-way pipe, and the other end is connected to a branch air outlet pipe (10); the other end of the branch air outlet pipe (10) is connected to an exhaust pipe (7), and the other end of the exhaust pipe (7) is connected to the main air outlet pipe (8); an anti-backflow valve (11) is provided on the branch air inlet pipe (4) at a position on the left side of the branch air outlet pipe (10), and an electromagnetic valve (12) and a water flow sensor (13) are provided on the branch air inlet pipe (4) at positions on the left and right sides of the branch air outlet pipe (10), and the water flow sensor (13) is close to one side of the backwash filter.

2. The device for preventing liquid backflow in an air washing pipeline according to claim 1, characterized in that: The anti-backflow valve (11) comprises a valve body (1101), a valve flap (1102) is arranged in the valve body (1101), a valve core (1103) is arranged at the upper end of the valve flap (1102), a valve cover (1104) is arranged on the top of the valve body (1101), the valve core (1103) is slidably connected to a guide plate (1105) after passing through the valve cover (1104), a cylinder (1106) is arranged on the top of the guide plate (1105), and the telescopic end of the cylinder (1106) is fixedly connected to the valve core (1103); a water level probe (1107) is arranged at the water inlet of the valve body (1101) on one side of the branch outlet pipe (10).

3. The device for preventing liquid backflow in an air washing pipeline according to claim 2, characterized in that: The valve core (1103) and the valve cover (1104) are slidably connected together.

4. The device for preventing liquid backflow in an air washing pipeline according to claim 1, characterized in that: The backwash filter is connected to a water inlet pipe (5) via a pipeline, and a check valve (9) is provided at the front end of the water inlet pipe (5).

5. The device for preventing liquid backflow in an air washing pipeline according to claim 1, characterized in that: The backwash filter is connected to the backwash pipe (6) via a pipeline, and the pipeline connecting the backwash filter and the backwash pipe (6) is connected to the branch air inlet pipe (4).

6. The device for preventing liquid backflow in an air washing pipeline according to claim 1, characterized in that: The anti-backflow valve (11), the solenoid valve (12) and the water flow sensor (13) are all electrically connected to the control cabinet.

7. The device for preventing liquid backflow in an air washing pipeline according to claim 1, characterized in that: The pump group (2) is located in a pump room, and the backwash filter is located in a filter room.

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