KR20070080036A - The reverse current prevention meter structure of the ball method. - Google Patents

Abstract

A counterflow preventive water meter valve structure is provided to perform measurement work exactly by rotating an impeller and keeping water flow in a water meter at the normal state, and cutting off a counterflow of to the inside of a water meter and preventing the reverse rotation of an impeller. The invention relates to a counterflow preventive water meter valve structure enabling to perform measurement work smoothly without obstructing the flow of water by guiding water to flow out through an outlet and an outflow pipe(1c) at the normal state by letting water flow in an inflow pipe(1b) of a water meter body(1) and rotating an impeller forward, rotating an opening and closing valve(3) on a foot bearing(8) and keeping an outlet open, and preventing the reverse rotation of the impeller by rotating the opening and closing valve reversely on the foot bearing using counter-flow pressure and bearing capacity of a spring(6) when water discharged through the outflow pipe of the water meter body flows backward and closing up the outlet of the water meter body automatically.

Description

The reverse current prevention meter structure of the ball method.}

1- perspective view of the main portion of the present invention.

Figure 2 is a plan view of the on-off valve open state during normal water flow of the present invention.

Figure 3 is a plan view of the on-off valve closed during water backflow of the present invention.

4 is a perspective view of the prior art.

Explanation of symbols for main parts of the drawings

1: meter body

1a: water pipe, 1b: inlet pipe, 1c: outlet pipe, 1d: outlet, 1e: impeller

2: on-off valve assembly

3: on-off valve, 4: buffer rubber 5: shaft 6: spring 7: screw

8 bearing part, 9 holder 10 holder joint 11 packing 11a front

11b: rear

[Documentation information of the prior art]

[Document 1] Patent: 1020030033404

[Reference 2] Practical Use: 2020010016943

[Document 2] Practical Use: 2020030016320

According to the present invention, when the water flowing into the inside of the meter through the inlet pipe is rotated by the impeller with the check valve equipped with a non-return valve, the normal flow state is discharged through the outflow pipe, and the water flows through the outflow pipe. In case of back flow, the back flow is automatically shut off to prevent the reverse rotation of the impeller, so that the water leakage is prevented in any case by the on / off valve structure of the meter to make accurate measurement. It is a check valve structure for preventing the flow of water, which is configured to widen the pipeline for smooth water passage on one side of the main body and insert a simple opening / closing valve at the outlet to automatically open and close the outlet according to the water flow direction.

In the conventional meter, there is no leakage prevention device due to backflow inside the meter, so the impeller is reversed due to the natural or artificial backflow of water, so that each measuring part linked with the impeller is also reversed. In case of returning to reversible, accurate measurement could not be made. Excessive reverse rotation is overloaded, which shortens the service life of the meter, and exploits the problems of the existing meter. It can be installed and deliberately used in large quantities to reduce the water burden.

Therefore, it is an example of improved type to prevent backflow in the conventional meter.

Practical: 2020010016943, 2020030016320

Patent: 1020030033404 describes a sliding valve on the side or top of the meter.

However, the above technical problem is that the O-ring cannot be supported when going from the inlet to the outlet so that the outlet is not completely sealed and it is difficult to close the shut-off valve completely by the water pressure only when a small amount of backflow may cause water leakage. Even though the on-off valve closes due to the large backflow water pressure, the impact sound that reaches the contact surface of the outlet port is high, so the reliability of the on-off valve is inferior.

The present invention has been made to solve the problems posed by the existing meter as described above, the purpose of which is to prevent the backflow and smooth flow of water and reduce the process cost of the meter, secure reliability, improve the efficiency for work.

When described in detail based on the accompanying drawings the components in the meter of the present invention for achieving the above object.

On both sides of the meter body 1, the inlet pipe 1b and the outlet pipe 1c are opposed to each other, and the inside of the body 1 is impeller 1e rotated by water flow and the rotation of the impeller 1e. In the vane type meter configured to measure the amount of water used by each of the measurement components interlocked with each other, the water is passed to one side of the outlet port 1d of the meter body 1 in which the inlet pipe 1b and the outlet pipe 1c are opposed to each other. The water supply pipe 1a is widened so as not to be restricted, and a supporting jaw is formed at the oil outlet 1d therein to prevent water leakage.

Here, the spring (6) together with the shaft (5) is assembled to the bearing part (8) in the case of the opening / closing valve (3) in which the buffer rubber (4) is inserted into the assembly (2) of the check valve for preventing the backflow of the present invention. It is configured as it is.

The on-off valve 3 is assembled between the packing 11 and the holder 9, and the holder 9 and the holder joint 10 are combined with each other to form an assembly.

Here, the role of each part is that the spring (6) pushes the back of the on-off valve (3), so it is always in close contact with the surface of the packing (11) to eliminate the gap to prevent leakage even in the fine back flow, the buffer rubber (4) 3) buffers the shock generated when it is opened to ensure the reliability of the valve, the front surface (11a) in the packing (9) is pressed against the support force of the outlet (1d) to prevent leakage to prevent leakage when water flows into the normal flow The rear surface 11b relieves the shock generated when the on-off valve 3 is closed and also serves to prevent leakage due to backflow.

In addition, the inlet / outlet opening and closing valves of the on / off valve assembly combined with other components are integrated into the backflow prevention valve to improve the workability by simply inserting and closing the outlet pipe 1c. It is a structure characterized in that it is configured to be automatically opened and closed by the on-off valve.

In the normal water flow according to the present invention, when the on-off valve is opened, as shown in [Fig. 2], when water flows into the inlet pipe 1b and rotates the impeller 1e forward, the outlet pipe 1c is passed through the outlet 1d. The on-off valve 3 is rotated about the bearing part 8 to open the outlet port 1d in the normal water flow state flowing through and flowing out, so that the open state is maintained and does not inhibit the water flow. This will be done.

However, in the case of the water flowing out through the outlet pipe 1c as shown in the embodiment of [Fig. 3] backflow, the on-off valve 3 is opened by the backwater pressure and the bearing force of the spring 6. Reverse rotation to the center to automatically close the outlet (1d) is to prevent the reverse rotation of the impeller (1e).

Therefore, it prevents the reverse rotation of each measuring component interlocked with the impeller (1e) to prevent the meter from returning to the reverse.

As described in the present invention, when the water introduced into the meter body through the inlet pipe rotates the impeller forward, in the normal water flow state flowing out through the outflow pipe, the on / off valve is kept open so that the water flow is prevented. If the water flows back into the meter body through the outlet pipe, the on / off valve closes the outlet port by the back pressure and the restoring force of the spring to automatically shut off the back flow to prevent the impeller from rotating backwards. This function ensures accurate measurement by only forward rotation of the valve and prevents the parts from being damaged or broken due to the overload caused by the reverse rotation of the impeller and each measurement component. Also, the meter is installed in the opposite direction to allow water to flow into the outlet pipe. Even if the on-off valve immediately closes the outlet of the impeller Rotation, as well as water, this configuration from being passed through to the other end because there is an effect of preventing the frequency.

And with the assembly configuration of the on-off valve and from the manufacturer's point of view, it is possible to respond by distinguishing and managing as a non-return meter and a general meter as a main body with water flowing smoothly, and the assembly of the present invention when the reverse flow prevention is desired. It is designed to be inserted at the back of the outlet pipe, which is convenient because it provides convenience of assembling, and it does not use a separate O-ring and cushioning material. It is a practical invention that saves and secures the reliability of parts.

Claims (1)

Meter body having a water pipe which widens the pipe so that water flow is not restricted on one side of the outlet pipe in the meter. Shock absorbing rubber to cushion the shock generated when the on-off valve is opened by the assembly of the non-return valve on the main body is inserted into the outlet pipe, Spring for supporting the rear to keep the on-off valve always closed, The shock-resistant packing that is pressed when the support jaw of the main body is prevented from leaking water and the closing valve is closed, Backflow prevention opening and closing valve structure which constitutes the above part and inserts into outlet pipe of meter.

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