CN201321407Y - One-way valve of aeration disk - Google Patents

Abstract

The utility model relates to an aeration disc one-way valve, which comprises an air intake pipe which also serves as a valve seat and a valve core which can move up and down in the air intake pipe. The air intake pipe is composed of a cylinder body and a base connected with the aeration pipe. The upper part is connected with a connecting pipe, and the inner surface of the upper part of the cylinder is provided with an internal thread connected with the connecting pipe. The lower part of the core rod is provided with a step, the width of the step is greater than the inner diameter of the connecting pipe, the bottom surface of the valve core head is circular, and the diameter of the bottom surface is greater than the inner diameter of the air inlet hole, and a sealing gasket is arranged between the contact surface of the valve core and the base. Compared with the existing technology, a sealing gasket and an improved valve core are added to play the role of double check, which effectively increases the safety of the check function, has better sealing performance, is not easy to produce gaps, and has better anti-backflow performance. Well, even if the aeration film is damaged, the mud-water mixture is not easy to pour into the air supply pipe.

Description

Aeration disc check valve

technical field

The utility model relates to a one-way valve, in particular to an aeration disk one-way valve, which belongs to the field of sewage treatment in the environmental protection industry.

Background technique

One-way valve, also called check valve, is a valve through which fluid can only flow in one direction, but not in the other direction. Check valves are widely used to prevent the reverse flow of fluid media on various pipelines or equipment. There are many types of one-way valves, and there are three commonly used ones for water supply and heat: 1. Spring type: the liquid moves from bottom to top, relying on the pressure to lift up the valve disc controlled by the spring. After the pressure disappears, the spring force will press the valve disc down to seal the liquid. Backflow. It is often used for check valves with small diameters. 2. Gravity type: similar to the spring type, it is closed by the gravity of the disc to prevent backflow. 3. Swing type: The liquid flows straight through the valve body, and the rotating valve disc on one side is pushed open by pressure. After the pressure is lost, the valve disc returns to its position by its own weight, and the reverse liquid pressure closes the valve disc.

The aeration disc is a membrane microporous aeration device, which is generally used in sewage treatment equipment such as aeration tanks, biological contact oxidation tanks, and biological stabilization ponds. The traditional sealed aeration device has no valve core and gasket, and the air flows through the valve seat and directly passes through the aeration disc and aeration membrane for aeration, so the anti-backflow performance is poor. When the aeration membrane on the aeration disk is broken, the air supply must be stopped and the sewage in the tank must be drained to replace the aeration membrane.

Chinese utility model patent 00221417.2 discloses a unit-lifting variable microporous non-reverse aeration device. The aeration disc is fixedly connected to the air supply pipe. The air tray is equipped with a check valve and an aeration film with micropores. It does not easily tear the aeration film due to frequent expansion and contraction. Even if the aeration film is damaged, the mud-water mixture is not easy to pour into the air supply pipe. Moreover, the unit with the damaged aeration head can be lifted out of the water surface for replacement and maintenance without stopping the machine and without discharging the water in the pool. The non-return device of the aeration disc in this patent is composed of a check valve nut, a fixed metal net, and a glass ball, and the glass ball is in a limited cover state under the fixed metal net. When the aeration tube is ventilated, the glass ball rises under the action of the airflow and moves irregularly in the cavity, which may easily cause the airflow to be unstable. Since the glass ball is an inelastic material and is in line contact with the air inlet of the aeration pipe, the sealing between the glass ball and the air hole of the aeration pipe is poor, and gaps are likely to be formed, and sewage will flow into the aeration pipe through the gap to cause sewage countercurrent.

Contents of the invention

The purpose of the utility model is to provide a one-way valve for the aeration disc with double check function, which has a simple structure, is convenient for disassembly and maintenance, and has good anti-backflow performance.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions to realize.

An aeration disc one-way valve, including an air intake pipe serving as a valve seat and a valve core that can move up and down in the air intake pipe. The air intake pipe is composed of a cylinder body and a base connected to the aeration pipe. The upper part of the cylinder body Connected with a connecting pipe, the inner surface of the upper part of the cylinder is provided with an internal thread connected with the connecting pipe, the valve core is a strip, the valve core is composed of a valve core head and a valve core rod, and the upper end of the valve core rod Insert into the connecting pipe, the lower part of the valve core rod is provided with a step, the width of the step is greater than the inner diameter of the connecting pipe, the bottom surface of the valve core head is circular, and the diameter of the bottom surface is greater than the inner diameter of the air inlet hole, the valve core and the base A gasket is provided between the contact surfaces.

As an optimization, a clip is provided at the bottom of the valve core head, and an annular groove is provided on the clip, and the gasket ferrule moves together with the valve core in the annular groove. The chuck makes the installation of the sealing gasket simple and fast, and plays a guiding role when the valve core falls in the intake pipe, so that the valve core falls into the air intake hole accurately.

As an optimization, the chuck is a cone or a hemisphere.

As an optimization, the valve core rod is composed of a single sheet, or composed of more than two fins with a common long side. The weight of the fins is relatively light, and the gap between the fins and the connecting pipe is relatively large, which is beneficial for the airflow in the intake pipe to diffuse into the aeration pan through the connecting pipe.

As an optimization, a guide angle is provided on the top of the valve core rod. It is beneficial to reduce the resistance of the valve core when it moves in the connecting pipe.

As an optimization, the valve core head is an oblate cylinder, and may also be an oblate circular truncated body.

As an optimization, the base is in the shape of a saddle.

As an optimization, the cross-section of the valve core rod is in a "Y" shape.

Compared with the prior art, the utility model adds a sealing pad and an improved valve core to play a double check function, effectively increasing the safety of the check function, so the anti-backflow performance is better; the valve core and the base There is a gasket between the contact surfaces, so the sealing performance is good and it is not easy to produce gaps; even if the aeration film is damaged, the mud-water mixture is not easy to pour into the air supply pipe, and when the aeration film on the aeration plate is broken, it needs to be replaced , the aeration membrane can be replaced without stopping the machine or discharging the sewage in the pool.

Description of drawings

Fig. 1 is a sectional view of the aeration device of the present invention.

Fig. 2 is a schematic diagram of cooperation between the intake pipe and the valve core of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figures 1 and 2, an aeration disc check valve includes an air intake pipe 6 that doubles as a valve seat, a valve core 2 that can move up and down in the air intake pipe, and a sealing gasket 7. The air intake pipe 6 is formed by a cylinder body 11 It is composed of a base 12 connected with the aeration pipe 4. The upper part of the cylinder body 11 is threadedly connected with the connecting pipe 5 at the lower part of the aeration pan 1. The inner surface of the upper part of the cylinder body 11 is provided with an internal thread connected with the connecting pipe 5. The base 12 It is saddle-shaped; the spool 2 is composed of a spool head 8 and a spool rod 10, the spool rod 10 is composed of three fins with a common long side, and the angle between the fins is 120 degrees, the cross section of the spool rod 10 Approximate "Y" shape, the top of the valve core rod 10 is provided with a guide angle, the valve core head 8 is a flat cylinder; Greater than the inner diameter of the connecting pipe 5, the distance between the step and the gasket 7 is approximately equal to two-thirds of the distance from the bottom end of the internal thread to the air inlet hole 3; the bottom surface of the valve core head 8 is circular, and the diameter of the bottom surface is larger than that of the inlet The inner diameter of the air hole 3, the bottom of the spool head 8 is also provided with a tapered chuck 9, the chuck 9 is provided with an annular groove, and the gasket 7 is inserted into the annular groove.

When the utility model works, the valve core 2 moves along the axial direction, and the chuck 9 is vertically downward. When the aeration tube 4 is inflated, the sealing gasket 7 and the valve core 2 rise together along the cylinder body 11 and the connecting pipe 5 under the push of the air, and the sealing gasket 7 is in the pushed open state. At this time, the air in the aeration tube 4 flows from The surrounding area of the gasket 7 is transported to the aeration disk 1 through the gap between the three fins of the valve core rod 10, the cylinder body 11 and the connecting pipe 5, and then aeration is performed through the aeration membrane installed on the aeration disk 1 deal with. When the step on which the spool 2 rises touches the lower end of the connecting pipe 5, the step is blocked by the connecting pipe 5, and the spool 2 stops rising. Under the pressure of the gas, the one-way valve is always in an open state. When the aeration pipe 4 stops supplying air, the valve core 2 will automatically fall under the action of its own weight and the residual pressure in the aeration membrane to seal the air inlet 3 of the air inlet pipe 6, which effectively prevents the sewage and sundries from flowing back into the in the air duct.

It should be understood that various improvements and modifications can be made within the scope of the invention as defined by the appended claims. For example, the chuck 9 can also be a hemisphere; the valve core rod 10 can be composed of a single sheet or more than two fins, and the cross section of the valve core rod 10 can also be "×", "*" or other shapes ; The valve core rod 10 can also be a spiral structure; the base 12 can also be other shapes that are convenient for connecting with the aeration pipe. All replacements that a person of ordinary skill in the art can directly derive or associate from the content disclosed in the utility model shall be considered as the protection scope of the utility model.

Claims (9)

1, a kind of aeration plate check valve, comprise the inlet pipe of double as valve seat and spool moving up and down in inlet pipe, it is characterized in that: described inlet pipe is made of with the base that links to each other with aeration tube cylindrical shell, the top of cylindrical shell is connected with pipe connecting, the internal surface on cylindrical shell top is provided with the internal thread that is connected with pipe connecting, described spool is a strip shape body, spool is made up of valve core head and valve core rod, insert in the pipe connecting described valve core rod upper end, the valve core rod bottom is provided with step, and the width of step is greater than the internal diameter of pipe connecting, and the bottom surface of described valve core head is circular, the diameter of bottom surface is provided with gasket greater than the internal diameter of air inlet port between the contact surface of described spool and base.

2, aeration plate check valve according to claim 1 is characterized in that: described valve core head bottom is provided with dop, and dop is provided with annular recesses, and described gasket is fastened in the annular recesses.

3, aeration plate check valve according to claim 2 is characterized in that: described dop is cone or hemisphere.

4, aeration plate check valve according to claim 1, it is characterized in that: described valve core rod is made of single plates.

5, aeration plate check valve according to claim 1 is characterized in that: described valve core rod is made up of the fin of growing the limit more than two altogether.

6, according to claim 1 or 4 or 5 described aeration plate check valves, it is characterized in that: described valve core rod top is provided with lead angle.

7, aeration plate check valve according to claim 1 and 2 is characterized in that: described valve core head is oblate cylinder.

8, aeration plate check valve according to claim 1, it is characterized in that: described base is saddle.

9, aeration plate check valve according to claim 1 or 5, it is characterized in that: the cross section of described valve core rod is " Y " font.

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