JPH0729384U - Flap valve - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a flap valve capable of opening a valve body even if the controlled fluid has a small pressure. [Constitution] The weight of the weight 8 is adjusted to a range in which the valve body 3 can close the flow path of the valve box 5 when there is no controlled fluid 6. When the controlled fluid 6 flows, the controlled fluid 6
Depending on the pressure and the weight of the weight 8, the valve box side link node 9
Through the valve body side link node 7 that is supported in the middle by
Is combined with the urging force for urging the valve body in the opening direction, and the valve body 3 easily opens the flow path of the valve box 5 against its own weight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flap valve attached to a drainage port of a drainage channel.

[0002]

[Prior art]

 Conventionally, flap valves have been installed at the discharge port of pumps and the drain port of drainage channels.

As shown in FIG. 3, a case where a conventional flap valve is attached to, for example, the drainage port 2 of the drainage channel 1 will be described. In this flap valve, a valve body 3 is attached to an upper portion of a valve box 5 by a hinge pin 4 or the like. The valve body 3 is freely opened and closed in the directions indicated by arrows A and B with the hinge pin 4 as a fulcrum. When there is no controlled fluid 6 in the drainage channel 1, the valve body 3 closes the flow channel of the valve box 5 by its own weight applied in the direction shown by the arrow B. When the controlled fluid 6 flows through the drainage channel 1 to the flow path of the valve box 5 in the arrow direction, when the pressure of the controlled fluid 6 exceeds the weight of the valve body 3 in the arrow B direction, the valve body 3 Is opened in the direction indicated by arrow A to open the flow path of the valve box 5, and the controlled fluid 6 is drained from the drain port 2 to the outside.

[0004]

[Problems to be solved by the device]

 However, in such a conventional configuration, a force acts on the valve body 3 due to its own weight in the direction of closing the flow path of the valve box 5 as shown by the direction of arrow B, but in the direction of arrow A. As shown by, no force can act in the opening direction. Therefore, when the valve body 3 is heavy and the pressure of the controlled fluid 6 is smaller than the weight of the valve body 3 in the direction of the arrow B, the valve body 3 is difficult to open even if the controlled fluid 6 flows in the direction of the arrow. There is a problem that the control fluid 6 is not sufficiently drained from the drain port 2 to the outside.

Further, even if the pressure of the controlled fluid 6 is small, the valve body 3 can be easily opened, so that it is possible to reduce the weight of the valve body 3, but in this case, the toughness of the valve body 3 is lost. There is a problem called

According to the present invention, it is not necessary to reduce the weight of the valve body 3, and the valve body 3 can be easily opened even if the pressure of the controlled fluid 6 is small, so that the controlled fluid 6 can be sufficiently drained and a strong valve can be used. The purpose is to provide a flap valve that the body 3 can use.

[0007]

[Means for Solving the Problems]

 The flap valve of the present invention is a flap valve that rotatably supports a valve body that closes a flow path of the valve box above the valve box, and opens and closes the valve body by the pressure of a controlled fluid, one end of which is the valve body. A valve body-side link node that is pivotally supported and a valve box-side link node whose one end is pivotally supported by the valve box are provided, and the other end of the valve box-side link node is pivotally supported midway in the valve body-side link node. A weight is attached to the other end of the valve body side link joint, and the weight of the weight is configured to urge the valve body in the opening direction via the valve body side link joint.

[0008]

[Action]

 With this configuration, the weight of the weight is adjusted to a range in which the valve body can close the flow path of the valve box when there is no controlled fluid.

When the controlled fluid flows, due to the pressure of the controlled fluid and the weight of the weight, the valve body side link node, which is axially supported by the valve box side link node, causes the valve body to move. Is combined with the urging force that urges in the opening direction, and the valve body easily opens the flow path of the valve box against its own weight.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. It should be noted that components having the same functions as those of the conventional example shown in FIG.

The flap valve of this embodiment is constructed as shown in FIG. Reference numeral 7 denotes a valve body side link node, one end of which is pivotally supported at a point D by a link member 3a attached to the upper end of the valve body 3, and the other end is provided with a weight 8 whose mounting position can be freely adjusted. Has been. Reference numeral 9 denotes a valve box side link node, one end of which is pivotally supported at a point a by a link member 5a attached to the upper end of the valve box 5 and the other end of which is a valve body side link node 7 on the way. It is supported by b.

The operation of the flap valve thus configured will be described below. As shown in FIG. 1, when the flap valve is installed, the weight of the weight 8 is sufficiently blocked by the valve body 3 when the drainage channel 1 does not have the controlled fluid 6, and the valve body 3 blocks the flow path of the valve box 5. Adjust within the range and as large as possible.

A case where there is no controlled fluid 6 in the drainage channel 1 will be described with reference to FIG. In this case, due to the weight of the weight 8 in the arrow C direction, the valve body side link node 7 is pivotally supported at the point b by the valve box side link node 9, so that a force acts in the arrow E direction. . This force urges the valve body 3 in the opening direction indicated by the arrow F via the hinge pin 4. However, in this case, the weight 8 is adjusted to a weight within a range in which the valve body 3 can sufficiently close the flow path of the valve body 5 in the direction of the arrow G, so that the valve body 3 is adjusted by its own weight. The channel can be sufficiently closed in the direction of arrow G.

A case where the controlled fluid 6 flows into the drainage channel 1 will be described with reference to FIG. In this case, the pressure of the controlled fluid 6 flowing through the drainage channel 1 in the direction of arrow H acts on the valve body 3 in the direction of arrow J. On the other hand, the valve body 3 is urged by the weight of the weight 8 in the arrow K direction via the valve body side link node 7 to urge the valve body 3 in the opening direction shown by the arrow L. In this state, the pressure of the controlled fluid 6 and the urging force of the weight 8 are combined, and the valve body 3 resists its own weight and is lightly opened by the pressure of the controlled fluid 6 to open the valve box. Open channel 5. In this way, the controlled fluid 6 is drained from the drain port 2 to the outside.

With this configuration, it is not necessary to lighten the dead weight of the valve body 3, and even if the valve body 3 is heavy and tough, the valve body 3 is easy to open even if the pressure of the controlled fluid 6 is small. As a result, the controlled fluid 6 can be sufficiently drained.

[0016]

[Effect of device]

 According to the present invention, when there is no controlled fluid, the weight of the weight urges the valve element in the opening direction via the valve element side link node which is axially supported by the valve box side link node. Even in the state, the valve body can block the flow path of the valve box by its own weight. When the controlled fluid flows, the valve body is attached in the opening direction by the pressure of the controlled fluid and the weight of the weight, through the valve body side link node that is axially supported at the valve box side link node. The urging force is combined with the urging force, and the valve body can open the flow path of the valve box against its own weight. Therefore, it is not necessary to lighten the valve body's own weight, and even if the valve body is heavy and tough, the valve body can be easily opened even if the pressure of the controlled fluid is small, and the controlled fluid is sufficiently Can be drained.

[Brief description of drawings]

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

FIG. 2 is an open state diagram of the valve body of the same embodiment.

FIG. 3 is a block diagram of a conventional flap valve.

[Explanation of symbols]

 7 Valve side link node 9 Valve box side link node

Claims (1)

[Scope of utility model registration request] 1. A flap valve that pivotally supports a valve body that closes a flow path of the valve box on the top of the valve box, and opens and closes the valve body by the pressure of a controlled fluid. One end of the flap valve is pivotally supported by the valve body. And a valve box side link node whose one end is pivotally supported by the valve box, the other end of the valve box side link node is axially supported in the middle of the valve body side link node, and A flap valve, in which a weight is attached to the other end of the valve body side link joint, and the weight of the weight biases the valve body in the opening direction via the valve body side link joint.