JPH0712246A - Fluid controller - Google Patents

Abstract

PURPOSE:To control the fluid stably for a long period of time by making closing motion of a flow path due to a diaphragm with an always constant fastening force, and lessening ultimately the wear and damage of diaphragm even after iterative services. CONSTITUTION:A handle 6 to operate for opening or closing a flow path 21 due to a diaphragm 3 is composed of a lid 61 and a handle body 62. The lid 61 is provided with a plurality of accommodation holes, in which a resilient piece 7 to energize vertical motions of an operation mechanism is accommodate. A transmitting member 8 to transmit the energizing force to the handle body is installed at the foremost extremity of the resilient piece 7. The energizing force of the resilient piece 7 is set by the diaphragm 3 to the minimum limit distance at which the flow path 21 is closed. The handle body 62 is provided with a recess to be fitted on the bottom of the transmitting member 8, and the lower part of the recess is coupled with the operation mechanism 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid controller, the purpose of which is to always perform a closing operation of a flow passage by a diaphragm with a constant tightening force, and to use it repeatedly even if it is used repeatedly.
It is an object of the present invention to provide a fluid controller capable of performing stable fluid control over a long period of time with extremely little wear and damage on the diaphragm.

[0002]

2. Description of the Related Art A diaphragm valve is generally used to control a corrosive fluid or a fluid requiring high purity in a chemical industrial plant. As this diaphragm valve, for example, as shown in FIG.
1) A valve box (A) provided with a diaphragm (B)
A holding portion (C) for fixing the peripheral portion of the diaphragm (B), and an operation mechanism (D) for operating contact or separation of the diaphragm (B) with respect to the contact portion (A-2). As an example, a device including the operating mechanism (D) and the handle (E) connected to the operating mechanism (D) can be given. As shown in FIG. 7 and FIG. 8, the handle (E) has an operating rod (D-1) which is a part of the operating mechanism (D) fitted therein, and is used to rotate the handle (E). Operation rod (D-
1) is configured to be moved up and down. In the diaphragm valve (Z) having such a configuration, when the handle (E) is rotated, the operating mechanism (D) connected to the handle (E) moves up and down, and the operating mechanism (D).
The diaphragm (B) is brought into pressure contact with or separated from the contact portion (A-2) of the valve box (A) by the vertical movement of (1) to open or close the flow path (A-1).

In the above diaphragm valve (Z), since the diaphragm (B) is always in contact with the fluid, it is usually made of a rubber material having excellent corrosion resistance and flexibility. Therefore, the flow path (A
-1) is opened and closed, so that it does not give resistance to the flow of fluid, has excellent sealing performance, does not leak fluid, and does not have the risk of corrosion. It also shuts off chemicals such as acids. Was a fluid controller with excellent features.

[0004]

However, in the diaphragm valve (Z) having the above-mentioned structure, the flow passage (A-
When 1) is closed, the diaphragm (B) is likely to be damaged, and as it is repeatedly used for a long time, deterioration and fatigue of the diaphragm become remarkable, and stable control cannot be performed for many years. Were present. That is, in the diaphragm valve (Z) having the configuration shown in FIG. 6, the operation mechanism (D) is moved up and down by the rotation of the handle (E), and the diaphragm (B) is brought into contact with a predetermined contact portion (A-).
Although the flow path (A-1) is closed by tightening it to (2), the tightening of the diaphragm (B) due to the rotation of the handle (E) is often unnecessarily strong, and the diaphragm (B) is soft. The diaphragm (B) made of a rubber material was given an excessive mechanical strength and was easily damaged or worn.

Therefore, such a diaphragm valve (Z)
Then, the diaphragm (B) is gradually deteriorated due to repeated opening and closing operations of the flow path (A-1), causing wear and damage, and stable control cannot be performed for a long period of time. There was a problem that the exchange of (B) had to be performed frequently. Therefore, in the industry, it is possible to always close the flow passage with a constant tightening force without giving an excessive tightening force to the diaphragm, and even if the opening / closing operation is repeated over a long period of time, the diaphragm will not be damaged or damaged. There has been a demand for the creation of a fluid controller which has extremely small deterioration and which can perform stable control over many years and has an excellent service life.

[0006]

According to the present invention, a valve box provided with a flow path, a diaphragm for opening or closing the flow path, an operating mechanism provided on the back side of the diaphragm, and this operating mechanism. Is a fluid controller provided with a handle portion for moving up and down. The handle portion includes a lid body and a handle body disposed inside the lid body, and the lid body is lifted by rotation. And the descending distance is set to a predetermined distance in advance, and a plurality of accommodation holes are provided inside thereof, and an elastic body for urging the vertical movement of the operating mechanism is accommodated in the accommodation holes. A transmission material for transmitting the urging force to the handle body is provided at the tip of the elastic body, and the urging force of the elastic body is the minimum urging force for closing the flow path by the diaphragm. Become the above By providing a fluid controller in which an upper part of the idler body is formed with a recess to be fitted with a lower part of the transmission material, and the lower part is connected to the operation mechanism, The above-mentioned conventional problems are solved.

[0007]

When the lid of the handle portion is rotated, the handle portion and the operating mechanism are moved up and down in accordance with the rotation, and the diaphragm is pressed against or separated from the abutting portion of the valve box along with the up and down movement. The operation of opening and closing the flow path is performed. The descent due to the rotation of the lid is stopped at a fixed distance, and after the descent of the lid is stopped, the handle body is lowered via the transmission material by the urging force of the elastic body housed in the housing hole. As the handle body is lowered, the operating mechanism is lowered and the diaphragm is pressed against the contact portion. Since the urging force of the elastic body to the handle body is set to the urging force of the minimum distance that the diaphragm closes the flow passage in advance, even if the lid is rotated, the diaphragm is given an excessive tightening force. Never.
Therefore, the closing operation of the flow path by the diaphragm can be always performed with a constant tightening force.

[0008]

The structure of the fluid controller according to the present invention will be described in detail below. FIG. 1 is a cross-sectional explanatory view showing an embodiment of a fluid controller (1) according to the present invention.
Is a valve box with a flow path (21), (3) is a diaphragm,
(4) is a holding member for fixing the peripheral portion of the diaphragm (3), (5) is an operating mechanism, and (6) is a handle portion. The diaphragm (3) is provided so as to face the abutting portion (22) of the valve box (2), and the peripheral portion thereof is fixed by the holding member (4). Further, the handle portion (6) has a lid (6
1) and a handle body (62) provided inside the lid body (61).

FIG. 2 is a plan view of the lid body (61), and FIG. 3 is FIG.
FIG. 9 is a sectional view taken along line AA ′ of FIG. As shown in the figure, in the present invention, the lid (61) has a plurality of storage holes (61a), (6).
1a) ... Is formed. This storage hole (61a)
In (61a), there are housed elastic bodies (7), (7), ... For biasing the vertical movement of the operating mechanism (5). In this invention, the storage hole (61) of the lid (61) is
The biasing distance of the elastic body (7) housed in (a) is set in advance to the minimum distance that the flow path (21) is closed by the diaphragm (3). In the present invention, the lid (6
The hole diameter and size of the storage hole (61a) formed in 1) or the number thereof are not particularly limited, and may be appropriately selected depending on the size of the flow path (21), the type of fluid used, the pressure, and the like. It should be set.

The elastic body (7) accommodated in the accommodating hole (61a) is not particularly limited as long as it biases the vertical movement of the operating mechanism (5), and any elastic body such as a coil spring is used. Can be appropriately adopted. Further, a transmission material (8) for transmitting the urging force to the handle body (62) described later is provided at the tip of the elastic body (7). The transmission material (8) is not particularly limited and any material can be used, but in the illustrated embodiment, a ball bearing is used.

FIG. 4 is a plan view of the handle body (62), and FIG. 5 is a sectional view taken along the line BB 'of FIG. As shown,
The handle body (62) is provided with a recess (62a) at an upper portion thereof for fitting with the lower surface of the transmission material (8). Further, a fitting portion (63) connected to the operation mechanism (5) is provided at a lower portion of the handle body (62), and the handle body (62) and the operation mechanism (5) are connected to each other.

In the controller (1) constructed as described above, when closing the flow path (21), first, the lid body (61) of the handle portion (6) is rotated. Then, with this rotation, the lid body (61) is lowered, and with this lowering,
The handle body (62) and the operating mechanism (5) are lowered respectively, but the lowering of the lid body (61) is stopped at a constant distance. When the lowering of the lid body (61) is stopped, the elastic material (coil spring in the illustrated embodiment) (7) housed in the housing hole (61a) is downwardly biased by the transmission material ( (Ball bearing in the illustrated embodiment)
The handle body (62) and the operating mechanism are lowered via (8). This elastic body (7) is used for the handle body (6
Since the urging force of 2) is set in advance to the minimum urging force with which the flow passage (21) is closed by the diaphragm (3), even if the lid body (61) is rotated more than necessary, the diaphragm is rotated. Excessive tightening force exceeding the minimum for closing the flow path (21) is not transmitted to (3).

Therefore, the minimum tightening force that the diaphragm (3) presses against the contact portion (22) and closes the flow path (21) is transferred from the elastic body (7) to the transmission material (8) and the handle body ( 62), transmitted to the diaphragm (3) via the operating mechanism (5), and the flow path (21) is closed. That is, since the descending distance of the lid body (61) is set to a constant distance in advance and the urging force of the elastic body (7) is also set to a certain range in advance, it is constant even if the lid body (61) is rotated. It will not descend beyond the distance. On the other hand, if the lid body (61) is rotated more than necessary, the elastic body (7) will idle in the recess (62a) of the handle body (62), and conversely, the elastic body (7) will move upward. Bias is expressed. Therefore, an excessive excessive urging force (tightening force) is not transmitted to the diaphragm (3), and the flow passage (21) is always kept at a constant tightening force (transmission force).
Can be closed.

[0014]

As described in detail above, according to the present invention, a valve box provided with a flow path, a diaphragm for opening or closing the flow path, an operation mechanism provided on the back side of the diaphragm, and this operation are described. A fluid controller provided with a handle portion for moving the mechanism up and down, wherein the handle portion comprises a lid body and a handle body disposed inside the lid body, and the lid body is rotated by As it is raised and lowered, its descending distance is set to a predetermined distance in advance, and a plurality of accommodation holes are provided inside, and an elastic body for urging the vertical movement of the operating mechanism is accommodated in this accommodation hole. The tip of the elastic body is provided with a transmission material for transmitting the urging force to the handle body, and the urging force of the elastic body is the minimum urging force for closing the flow path by the diaphragm. Tena, the above The upper part of the handle body is formed with a recess for fitting with the lower part of the transmission material, and the lower part is connected to the operating mechanism. Since the closing operation of the flow path can be performed always with a constant tightening force, the diaphragm is not worn or damaged due to repeated opening / closing operations of the flow path without applying excessive tightening force to the diaphragm. Is extremely small, stable fluid control can be performed for a long period of time, and the fluid controller is excellent in service life.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a fluid controller according to the present invention.

FIG. 2 is a plan view showing an embodiment of the lid of the present invention.

3 is a sectional view taken along the line AA ′ in the embodiment shown in FIG.

FIG. 4 is a plan view showing an embodiment of the handle body of the present invention.

5 is a sectional view taken along line BB ′ in the embodiment shown in FIG.

FIG. 6 is a sectional view showing an example of a conventional diaphragm valve.

7 is a plan view showing an embodiment of a handle portion in the diaphragm valve shown in FIG.

8 is a sectional view taken along line CC ′ in the conventional example shown in FIG. 7.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid controller 2 Valve box 21 Flow path 3 Diaphragm 4 Clamping member 5 Operation mechanism 6 Handle part 61 Lid 61a Storage hole 62 Handle body 62a Recess 7 Elastic body 8 Transmission material

Claims (1)

[Claims] 1. A valve box having a flow path, a diaphragm for opening or closing the flow path, an operating mechanism provided on the back side of the diaphragm, and a handle portion for moving the operating mechanism up and down. A fluid controller provided, wherein the handle portion comprises a lid body and a handle body disposed inside the lid body, and the lid body is raised and lowered by rotation and its descending distance. Is previously set to a constant distance, and a plurality of accommodation holes are provided therein, and an elastic body for urging the vertical movement of the operating mechanism is accommodated in the accommodation hole. Is provided with a transmission material that transmits the urging force to the handle body, and the urging force of the elastic body is the minimum urging force that closes the flow path by the diaphragm, and the handle body is above the handle body. To the above A fluid controller characterized in that a recess is formed to be fitted with a lower portion of the transmission material, and the lower portion is connected to the operating mechanism.