JP2000088124A - Check valve with reversible closing direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a check valve the closing direction of which is inverted. SOLUTION: A rotary disc 3 to close a passage is arranged at the internal part of a valve casing 2 inverting around the axis of a valve spindle 4. A valve seat to form the port 5 and the peripheral edge of the port 5 is arranged at the rotary disc 3. The swing valve element 7 is arranged at the rotary disc 3 oscillatorily throughout a range from a position a swing valve element 7 is brought into contact with a valve seat to close the port 5 and a position where the port 5 is released, and an operation part 9 to effect inversion operation of the rotary disc 3 is arranged at one end of the valve spindle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve for controlling a flow direction of a fluid in a flow path, and more particularly to a check valve capable of reversing a closing direction.

[0002]

2. Description of the Related Art Non-return valves used in pipes and the like include:
There are a lift type, a swing type, a ball type, a dual plate type, and the like, in which the flow of the fluid in the flow path is controlled in one direction.

[0003]

However, in the conventional check valve, it is not possible to reverse the closing direction of the fluid and control the flow of the fluid in the opposite direction when the valve is interposed in the middle of the pipeline. However, since the closing direction of the fluid in the pipeline is determined at the time of installation, when selectively controlling the flow of the fluid in one direction or the other direction, the closing direction of the check valve is set to each of the parallel pipelines. There is a problem that it is necessary to install the pipes in a manner that is opposite to each other, and the configuration and the switching operation of the pipeline are complicated.

An object of the present invention is to solve the above-mentioned problem and to provide a check valve capable of reversing a closing direction.

[0005]

In order to solve the above problems, a check valve capable of reversing the closing direction according to the present invention comprises a valve body support member for closing a flow passage in a valve box around an axis of a valve stem. The valve body support is provided with a port and a valve seat forming a peripheral portion of the port, and the valve body support is brought into contact with the swing valve body against the valve seat to close the port and open the port. The valve is provided so as to be swingable with respect to the position, and an operation portion for inverting the valve body support at one end of the valve rod is provided.

With the above-described structure, the fluid flowing from one side to the other side in the flow path in the valve box presses the swing valve body in a direction away from the valve seat to open the port, and the valve body passes through the port. Pass through the support. Fluid flowing backward from the other side to the one side in the flow path in the valve box presses the swing valve body against the valve seat,
A swing valve closes the port to prevent backflow.

[0007] When reversing the closing direction of the fluid in the valve box, the operating unit controls the valve body support to be reversed via the valve rod to reverse the closing direction of the swing valve body.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG.
Is provided with a rotating disk 3 as a valve body support for closing a flow path inside a valve box 2 so as to be reversible around the axis of a valve rod 4.
The rotary disk 3 is provided with a port 5 and a valve seat 6 which forms a peripheral portion of the port 5. The rotating disk 3 is a swing valve 7
Is supported by the support shaft 8 so as to be swingable between a closing position where the port 5 is closed by contacting the valve seat 6 and an opening position where the port 5 is opened. The mutual pressure contact surfaces of the portions are inclined surfaces that engage in the flow direction of the fluid, but it is also possible to adopt a structure in which the pressure contact surfaces are pressed on a flat surface as shown in FIG.

An operation section 9 is provided on the outside of the valve box 2 so as to be connected to one end of the valve stem 2, and the operation section 9 is for reversing the operation of the rotating disk 3. The operation unit 9 includes a lock mechanism for locking the rotating disk 3 at a position facing the opening on one side of the valve box 2 and at a position facing the opening on the other side, and has a lock release lever 10 on the base end side. Have.

With the above configuration, the fluid flowing from one side to the other side in the internal flow path of the valve box 2 presses the swing valve 7 in a direction away from the valve seat 6, and the swing valve 7 closes the port 5. In the open state, it passes through the rotating disk 3 through the port 5. Fluid flowing backward from the other side to the one side in the internal flow path of the valve box 2 presses the swing valve body 7 against the valve seat 6, and the valve seat 6
Locks the swing valve 7 and the swing valve 7
To prevent backflow.

When the direction of closing the fluid in the internal flow path of the valve box 2 is reversed, the lock release lever 10
To release the lock. In this state, the operation unit 9 is rotated, the rotating disk 3 is reversed through the valve rod 4, the closing direction of the swing valve body 7 is reversed, and the lock release lever 10 is released. Release and lock the attitude of the rotating disk 3.

[0012]

As described above, according to the present invention, since the port and the swing valve for opening and closing the port are provided on the valve body support which can be turned around the axis, the valve body support is turned over. By doing so, the direction in which the fluid is closed in the valve box can be reversed, and the direction in which the check is controlled by one check valve can be selected.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a check valve according to an embodiment of the present invention.

FIG. 2 is a front view showing a swing valve in the check valve.

FIG. 3 is an enlarged view showing a main part of the check valve.

FIG. 4 is an enlarged view showing a main part of a check valve according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Check valve 2 Valve box 3 Rotating disk 4 Valve stem 5 Port 6 Valve seat 7 Swing valve body 8 Support shaft 9 Operation part 10 Lock release lever

Claims (1)

[Claims] 1. A valve body support for closing a flow path in a valve box is provided so as to be reversible around an axis of a valve stem, and a valve seat for forming a port and a peripheral portion of the port is provided on the valve body support. A swing valve body is provided on the valve body support so as to be swingable between a position for closing the port by contacting the valve seat and a position for opening the port,
A check valve capable of reversing a closing direction, wherein an operation section for reversing operation of a valve body support is provided at one end of a valve stem.