KR200347503Y1 - Dual plate check valve - Google Patents

Abstract

The present invention relates to a dual plate check valve (DUAL PLATE CHECK VALVE) to protect the pump and the system from the instantaneous backflow through the pipeline of the system during the pump stop and power failure during the pump pipeline system.

According to the present invention, a separate sub pipe is installed at the valve inlet and the outlet of the valve body and the valve disc at the center, and a relief valve is installed at a separate sub pipe installed so that when a high pressure is generated due to water shock. In other words, when the relief valve is over the set pressure, the relief valve opens automatically to bypass the abnormal pressure to minimize water shock to provide optimum operating conditions to prevent damage to the pipeline and the valve itself. Dual plate check valves are provided.

Description

Dual Plate Check Valve {DUAL PLATE CHECK VALVE}

The present invention relates to a dual plate check valve (DUAL PLATE CHECK VALVE) to protect the pump and the system from the instantaneous backflow through the pipeline of the system during the pump stop and power failure during the pump pipeline system.

The conventional dual plate check valve is used to simply prevent the reverse flow during the stop and power failure of the pump in the pipeline system, so the pump stops and starts to close with the start of the reverse flow after the flow stops. The severe shock and instantaneous flow of back flow can be blocked, causing high pressure due to water shock, which can cause damage to the pipe due to shock. In addition, there is a risk of breaking the main parts of the valve. In fact, the pump pipeline system is not stable and smooth operation.

The present invention is to solve the above problems, by installing a relief valve in a separate sub-pipe installed in the valve inlet and outlet to the center of the valve body and the valve surface of the valve body, When high pressure occurs due to water shock, that is, over the set pressure of the relief valve, the relief valve opens automatically, bypassing the abnormal pressure instantaneously, minimizing water shock and providing the optimal operating conditions. This is to prevent damage to the valve itself.

1 is an external view of a dual plate check valve according to the present invention

Figure 2 is an external view of the conventional dual plate check valve

Figure 3 is a partial enlarged cross-sectional view showing the configuration and operation of the present invention

<Explanation of symbols for the main parts of the drawings>

1: valve body

2: dual plate disc

3: relief valve

4: lieutenant

5: fixed shaft

1-1: inlet

1-2: outlet

1-3: Valve Body Sheet

2-1: Dual Plate Disc Sheet

2-2: Forced Return Coil Spring

3-1: Relief Valve Disc

3-2: Relief Valve Coil Spring

3-3: relief valve body

Hereinafter, the gist of the present invention will be described in detail with reference to the accompanying drawings.

In the dual plate check valve, a separate secondary pipe (4) is provided at the valve inlet (1-1) and the outlet (1-2) with the valve body (1) and the dual plate disc (2) at the center of the water level. The relief valve 3 is installed in the attached sub pipe 4.

(1-3) is the valve body sheet, (2-1) is the dual play disc sheet, (2-2) is the forced return coil spring, (3-1) is the relief valve disc, (3 -2) is a relief valve coil spring, (3-3) relief valve body, and (5) is a fixed shaft.

Referring to the effects of the present invention as described above in detail.

The present invention is based on the flow rate and pressure of the fluid discharged from the pump of the pump pipeline system from the valve inlet (1-1) to the valve outlet (1-2) from the valve inlet (1-1) and the disk (2). ), The coil spring (2-2) is pressed in the direction of the fixed shaft (5) to open, the fluid discharged by the pump in the state that the disk (2) is open, stop the pump or the electrostatic When the pump stops due to this, the discharged fluid is flowed back through the valve outlet (1-2), through the disk (2) to the valve inlet (1-1) after the flow stops, the reverse flow of the disk (2) At the same time, the valve disc 2 is momentarily closed due to the restoring force of the forced return type coil spring 2-2, which is integrally operated with the disc 2, and the flow of fluid stops High pressure from the impact of the valve Pulsation phenomenon occurs, but at this time, the high-pressure backflow fluid is forced to close the relief valve disc 3-1, which is forcibly closed by the coil spring 3-2 of the relief valve 3 installed in the subsidiary tube 4 of the valve. Open, and the fluid in the outlet section 1-2 flows out through the disk 3-1 and passes through the valve sub-pipe 4 to the valve inlet section 1-1 to temporarily relieve the high pressure. This ensures optimal controlled flow control during backflow, as well as safeguarding the system's facilities and dual plate check valves from water shocks that can occur during pump stops and blackouts, as well as facilitate pump operation.

As described above, the present invention is a relief valve (3) to relieve the abnormal high pressure when the abnormal high pressure occurs due to the water shock phenomenon in the reverse flow of the valve, dangerous water shock that may occur during the reverse flow due to the pump stop and power failure of the large pump pipeline system It not only secures the system's facilities and valves from the system, but also keeps the pump quiet and perfect, and keeps the equipment free from frequent shocks and vibrations when the pump is closed and frequent failure of the equipment related to the pump station and failure of the control system. It is effective in reducing maintenance and overall costs.

Claims (1)

In the dual plate check valve, a separate secondary pipe (2) is provided at the valve inlet (1-1) and the outlet (1-2) with the valve surface (1) and the dual plate disc (2) at the center of the water level. Dual plate check valve, characterized in that the pressure control relief valve (3) is installed on the installed secondary pipe (4)