KR200214850Y1 - Butterfly type tilting check valve - Google Patents

Abstract

The present invention is equipped with a valve body metal seat ring (2) inclined about 30 ° to the valve body and a metal valve disc seat ring (2 ') opposite thereto, and the valve shaft (3) is a fluid of the valve body (1). The valve disc 4 is freely opened in accordance with the flow of the fluid at the center of the shaft 3, and the valve auxiliary disk 4 'is axially connected to the connecting arm 6. It is fixed to (3) and rotates integrally with the shaft, and is a flow control valve (8) attached to the hydraulic cylinder (7) attached to one side end (3-1) of the shaft is composed of a structure that can adjust the flow of hydraulic fluid in the cylinder The butterfly which closes the disk 4 and the auxiliary disc 4 'at two speeds while absorbing the water shock caused by the backflow in the process of closing the valve disc 4 and the auxiliary disc 4' in the open state. It relates to a type check valve.

Description

Butterfly check valve {BUTTERFLY TYPE TILTING CHECK VALVE}

The present invention has a valve body seat ring which is inclined by about 30 ° to the valve body and has a valve disc seat ring opposite thereto, and the valve side center is in an eccentric position above the valve body fluid passage aperture. It has an auxiliary disk and is equipped with a separate auxiliary disk seat ring, and the valve disk freely opens and closes around the valve according to the fluid flow, the valve disk is first closed in case of backflow, and the auxiliary disk is fixed by an arm connected to the valve shaft. The hydraulic cylinder is connected to one side of the valve shaft to close the auxiliary disk, and the flow control valve built into the cylinder adjusts the oil flow in the cylinder to absorb the shock as the auxiliary disk is closed in the open state by the reaction force. Butterfly-type check valve with secondary disk closing slowly at two speeds Relate to.

In the past, check valves have been proposed and used, but in general, the valve shaft is installed on the upper end of the valve body, and the disk is fixed to the valve shaft by the disk fixing arm which is integrally connected with the hinge pin. As the swing rotates, the disk compresses with the valve body to block backflow, so it does not absorb the shock when it is closed.In addition, when the valve is large diameter, the water shock pressure generated by the backflow due to the short closing time of the valve Due to this great noise, noise caused by impact pressure such as damage to pipelines and valves was severe, and there were many difficulties in maintenance such as cracks in buildings where valves were installed.

The object of the present invention is to have the valve body seat ring inclined about 30 ° to the valve body and have a valve disc seat ring opposite thereto, the center of the valve shaft being in an eccentric position above the valve body fluid cylinder and the center of the aperture, A valve disc with a separate hump (4 ') that can adjust the center of gravity of the valve disc is equipped with a separate auxiliary disc and an auxiliary disc seat ring, and the valve disc freely opens and closes according to the flow of fluid around the valve axis. When the valve disc is closed, the valve disc is first closed and the valve disc is fixed by an arm connected to the valve shaft. A hydraulic cylinder is mounted on one side of the valve shaft, and the oil disc flows in the cylinder as a flow control valve built in the cylinder. To absorb the shock as a result of the reaction force closing the auxiliary disk in its open state. Afterwards, the auxiliary disk closes slowly at two speeds, and the opening and closing time can be adjusted compared to the existing check valve, and it is compact, saves manufacturing costs, is easy to maintain, and improves the appearance and performance of the check valve. It is to provide a butterfly check valve.

1 is a cross-sectional view showing the configuration and operation of the present invention

2 is a cross-sectional view of the main components of the present invention

Figure 3 is a cross-sectional view showing the configuration and operation of the existing valve

<Description of the code | symbol about the principal part of drawing>

1.valve body

2. Valve body metal seat ring 2 '. Valve disc metal seat ring

3. Valve Shaft 3-1. One end of valve side

4. Valve disc 4 '. Valve Auxiliary Disc 4 '. lump

5,5 '. Secondary disk seat ring

6. Cancer

7. Hydraulic Cylinder 7-1. Piston Rod 7-2. Cylinder top cover

7-3. Piston 7-4. Lower cylinder cover

8. Flow control valve

9,9-1. Euro piping

According to the present invention, the valve body 1 is equipped with a valve body metal seat ring 2 inclined by about 30 ° and a metal valve disc seat ring 2 'facing the valve body 3, and the valve shaft 3 is provided with a valve body. The valve disc (4) having a separate hump (4 ') that is located in an eccentric position above the center of the fluid passage aperture and has an adjustable center of gravity of the valve disc has a separate auxiliary disk (4') and auxiliary disk seating ( 5) (5 '), the valve disc (4) is freely opened and closed in accordance with the fluid flow around the valve shaft (3), the auxiliary disk (4') is an arm (6) connected to the valve shaft (3) The hydraulic cylinder (7) is connected and mounted at one end of the valve shaft (3), and the flow control valve (8) attached to the hydraulic cylinder (7) and a separate pipe (7) constitute the valve disc (4). ) And the auxiliary disk 4 'are closed in the open state, the valve disk 4 is first closed by the flow of the fluid. Then, the valve auxiliary disk 4 ′ is provided with a butterfly check valve of a structure that closes at a speed of two stages while gradually absorbing the water shock pressure generated in the closing process by the operation of the hydraulic cylinder 7.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The valve body 1 is equipped with a valve body metal seat ring 2 inclined about 30 ° and a metal valve disc seat ring 2 'facing the valve body 1, and the valve shaft 3 passes through the valve body 1 fluid. Since the valve is in an eccentric position above the center of the aperture, when the fluid flows in the normal direction in the pipeline with the valve, the valve disk 4 having a separate nod 4 'that can adjust the center of gravity of the valve disk according to the flow of the fluid. Is freely opened, and the auxiliary disk 4 'fixed by the arm 6 connected to the valve shaft 3 is also opened like the valve disk 4, and at the same time the valve shaft 3 rotates so that the valve shaft 3 ) The piston rod (7-1) of the hydraulic cylinder (7) mounted at one end (3-1) is out of the top of the cylinder cover (7-2), and when the back flow occurs in the pipeline with the valve The valve disc is closed rapidly by the fluid flowing back The primary index is achieved by the contact between the valve disc seat ring 2 'and the valve body metal seat ring 2, and the auxiliary disc 4' in the open state is also changed to the closed state by countercurrent. As the reverse pressure acts on the auxiliary disk 4 'and the valve shaft 3 rotates by this force, the piston piston rod 7-1 is lowered, so that the piston 7-3 is lowered along the inside of the cylinder. Therefore, hydraulic pressure is generated in the piston lower cylinder, and at this time, a resistance force is generated so that the hydraulic oil passes through the flow control valve 8 via the flow path piping 9 attached to the cylinder lower cover 7-4, and the upper cylinder cover 7 It flows into a cylinder via the flow path piping 9-1 attached to -2).

At this time, the resistance in the lower cylinder of the piston is adjusted by adjusting the flow of the operating oil according to the locked state of the flow regulating valve 8, so that the lowering speed of the piston can be arbitrarily adjusted, and the rotational speed of the valve shaft 3 is slowed down. There is provided a check valve having a structure in which the auxiliary disk 4 is closed later than the valve disk 4 to absorb the water shock caused by the reverse flow, and the valve disk 4 and the auxiliary disk 4 'are closed in two stages. To provide a butterfly check valve with time adjustment, compactness, reduced manufacturing cost, easy maintenance, and improved check valve appearance and performance.

As described above, according to the present invention, the valve body 1 is provided with a valve body metal seat ring 2 inclined about 30 ° and a metal valve disc seat ring 2 'facing the valve body 3, and the valve shaft 3 ) Is located eccentrically above the valve body (1) fluid cylinder and the center of gravity, and the disk having a separate nod (4 ') that can adjust the center of gravity of the valve disk is free to open in accordance with the flow of the fluid and the valve shaft ( The auxiliary disk 4 'fixed by the arm 6 connected to 3) is also freely opened. When a back flow occurs in the pipeline in which the valve is installed, the valve disk 4 is also rapidly closed by a backflowing fluid. available on the secondary disc ⁽⁴¹⁾ also changes, because, the closed state by the reverse flow, this time as the flow control valve 8 is attached to the cylinder the lowering speed of the piston controlling the hydraulic oil flow in the cylinder hameuroseo optionally adjusted to The secondary disc 4 'is closed later than the valve disc 4 while absorbing the water shock against backflow due to the delay, so that the valve disc 4 and the auxiliary disc 4' are closed in two stages. The check valve can be provided to adjust the opening and closing time, can provide a butterfly check valve that is compact, reduced manufacturing cost, easy maintenance, improved appearance and performance of the check valve.

Claims (1)

The valve body (1) is equipped with a valve body metal seat ring (2) inclined about 30 ° and a metal valve disc seat ring (2 ') opposite thereto, and the valve shaft (3) has a valve body (1) The valve disc 4 having a separate hump 4 ', which is eccentrically above the center and whose center of gravity adjusts the center of gravity of the valve disc, is freely rotatable and the valve auxiliary disc 4' is connected to the connecting arm ( 6) is fixed to the shaft (3), rotates integrally with the shaft, the flow control valve (8) attached to the hydraulic cylinder (7) mounted on one end (3-1) of the shaft to control the flow of hydraulic fluid in the cylinder The disk 4 and the auxiliary disk 4 'are at two speeds while absorbing the water shock caused by backflow in the process of closing the valve disk 4 and the auxiliary disk 4' in the open state. Closed Butterfly Check Valve