JPH07293715A - Small valve - Google Patents

Abstract

PURPOSE:To provide a small valve where the sealability of a valve element and a valve element storing body is improved. CONSTITUTION:A small valve is provided with a valve element 1 to be turned by the prescribed quantity, and a valve element storing body 2 which stores and supports the valve element 1 in a turnably manner and forms flow passage parts 22, 22 in an inclined manner to the valve element 1, and when the valve element 1 opens or shuts off the flow of the fluid in the flow passage parts 22, 22, small sectional area parts 24, 24 whose passage area is smaller than the regular flow passage area are provided at the end part on the inner side of the flow passage parts 22, 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small valve for use in a small device such as a sphygmomanometer and for flowing or stopping a fluid.

[0002]

2. Description of the Related Art Conventionally, as this type of small valve, there are those disclosed in Japanese Patent Laid-Open No. 59-99172 and Japanese Patent Laid-Open No. 5-39873. These are provided with a valve body that reciprocates a predetermined amount and a valve body housing that houses and supports the valve body, and by forming the valve body and the valve body housing with different hardness, The sealability is ensured without using packing between the valve body and the housing.

[0003]

However, in the above-mentioned small valve, the contact area between the valve body and the valve body accommodating body becomes smaller as the size becomes smaller, so that the sealing performance becomes unstable when the valve body is tightened. It will be easier.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a small valve in which the sealing property between the valve body and the valve body housing is improved.

[0005]

In order to achieve the above object, a small valve according to a first aspect of the present invention is provided with a valve body which rotates or reciprocates a predetermined amount, and a valve body which enables the above-mentioned operation. A small valve for accommodating and supporting, comprising a valve body container having a flow path portion formed so as to interlink with the valve body, wherein the valve body opens or blocks the flow of fluid in the flow path portion. At least one of the valve portions of the passage portion is provided with a small cross-sectional area portion having a flow passage area smaller than a normal flow passage area at its inner end portion.

According to a second aspect of the present invention, there is provided a small-sized valve in which the flow passage area of the small sectional area portion of the first aspect is larger than that of the flow passage formed between the flow passage portions by the valve body. It is configured to be formed as follows.

Further, a small valve according to a third aspect of the present invention is configured such that the valve body according to the first or second aspect is provided with a flow hole portion that forms a flow passage between the flow passage portions.

A small valve according to a fourth aspect of the present invention is configured such that the small cross-sectional area portion of the one according to any one of the first to third aspects is formed so as to form a step with the flow path portion.

According to a fifth aspect of the present invention, there is provided a small valve in which a step portion is provided inside the valve body accommodating body so as to prevent the valve body of the first aspect from operating in the unnecessary direction. The valve body is provided with a fitting step portion that fits into the step portion.

A small valve according to a sixth aspect of the present invention has a structure in which the valve body containing body according to any of the first to fifth aspects is formed of a soft material.

[0011]

According to the structure of the first aspect, since the area of contact with the valve body is increased by the amount of the flow passage area smaller than usual by providing the small cross-sectional area portion, the sealing performance is improved.

According to the second aspect of the present invention, it is easy to absorb a manufacturing error in the communicating portion between the small cross-sectional area portion and the flow passage formed between the flow passage portions by the valve body.

According to the third aspect of the present invention, the predetermined flow rate can be reliably ensured when the fluid flow in the flow path portion is in the fully open state.

According to the structure described in claim 4, when another member such as a pipe is inserted into the flow path portion from the outer end thereof, the tip of the other member abuts the stepped portion of the small cross-sectional area portion. .

According to the fifth aspect of the invention, the valve body is restrained from moving in an unnecessary direction, so that the valve body reliably operates within a predetermined amount.

According to the sixth aspect of the present invention, since the valve body containing body is pressed against the valve body by the fluid pressure, the sealing property is further improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This small valve is configured to include a valve body 1 and a valve body housing 2 that houses and supports the valve body 1.

The valve body 1 is made of a hard material such as metal, glass, and hard synthetic resin, and has a substantially columnar shape.
11 and a handle portion 12 provided at one end of the valve rod portion 11. The valve rod portion 11 is formed with a step on the other end side, and the portion formed with the step and having a small diameter is a step portion 13
I am trying. Further, the valve rod portion 11 has a through hole portion 14 having a substantially circular cross section that is penetrated at a predetermined position thereof so as to be substantially orthogonal to the axis line.

The valve body housing 2 is made of a soft material such as rubber or vinyl chloride having a hardness lower than that of the valve body 1, and has a housing portion 21 for housing the valve body 1 and flow passage portions 22, 22. Have The accommodating portion 21 is formed in a cylindrical shape so as to come into contact with the outer peripheral surface of the valve rod portion 11, and the sealing performance is ensured by the contact with the valve rod portion 11. Further, the accommodating portion 21 has a fitting stepped portion 23 at a portion fitted to the stepped portion 13 to prevent the valve body 1 from coming out downward.

The flow passages 22 and 22 have a substantially circular cross section and are shown in FIG.
As shown in FIG. 5, the respective axes are offset from each other and formed substantially parallel to each other. Further, the flow path portions 22,22 have small cross-section area parts 24,24 formed in a step-like manner so as to be smaller than the flow path area (opening cross-sectional area) of a normal portion in a portion communicating with the accommodation portion 21. ing. The flow passage area of the small cross-sectional area portions 24, 24 is formed to be larger than the flow passage area of the circulation hole portion 14, and it is easy to absorb a manufacturing error in a communication portion with the circulation hole portion 14. .

When the valve body 1 is housed in the valve body housing 2, the valve rod portion 11 is inserted into the housing portion 21, and the end portion of the valve rod portion 11 is connected to the connecting member.
It is done by connecting to 3. The connecting member 3 is a valve body.
The valve body 1 is connected to the end of the valve stem 11 so as to prevent the movement of the valve 1 in the axial direction and rotate a predetermined amount around the axis, and is formed so as to close the opening end face of the accommodating portion 21. ing.

The small valve constructed as described above is a valve body
1 is rotatable about the axis with respect to the valve accommodating body 2 by a predetermined amount.
The flow path constituted by the through hole 14 and the flow hole portion 14 is opened or closed. When rotating the valve body 1, handle
It is done by turning 12.

From the above, the present embodiment has the valve stem portion 11 and the accommodating portion.
Since the contact area with 21 is larger than that without the small cross-sectional area portion 24, the sealability between the valve stem portion 11 and the accommodating portion 21 is improved as compared with the one without the small cross-sectional area portion 24. Therefore, it is possible to reliably prevent the fluid from leaking to the outside.

Further, in this embodiment, since the valve body containing body 2 is made of a soft material, the containing portion 21 is pressed against the valve rod portion 11 by the fluid pressure, and the seal between the valve rod portion 11 and the containing portion 21 is made. Since the fluid pressure is higher when the flow path is blocked than when the flow path is opened, the sealing property is further significantly improved.

Further, in this embodiment, when a pipe (not shown) through which the fluid flows is inserted and fixed from the outer side end portion into the flow path portions 22 and 22, the tip of the pipe has small cross-sectional area portions 24 and 24. Since it comes into contact with the stepped portion and cannot be inserted further than that, the tip of the pipe does not hit the valve stem portion 11, and the valve stem portion 11 can be protected.

In this embodiment, the valve body 1 is replaced by the valve body containing body.
Although it was configured to rotate around the axis with respect to 2,
1 may be configured to reciprocate in the axial direction with respect to the valve body containing body 2.

Further, in this embodiment, the small cross-sectional area portions 24, 24 are provided in the two flow path portions 22, 22, but the small cross-sectional area portion 24 may be provided in either one of the flow path portions 22. Good.

Further, in this embodiment, the small cross-section areas 24, 24 are formed stepwise with respect to the normal parts of the flow path portions 22, 22, but the small cross-section areas 24, 24 are formed in a taper shape. May be.

Further, in the present embodiment, the flow path portions 22 and 22 are formed so as to be shifted so that the respective axis lines are substantially parallel. However, as shown in FIG. You may form so that it may become substantially the same straight line. In this case, the small cross-section area 24,2
Since the opening area of 4 for the valve stem portion 11 is smaller than that of the present embodiment, absorption of manufacturing error in the communicating portion with the flow hole portion 14 is slightly inferior to that of the present embodiment, but the valve stem portion
Since the contact area between 11 and the housing portion 21 is increased, the sealing property is improved.

[0030]

The small valve according to the first aspect of the present invention can improve the sealing property because the area of contact with the valve body is increased by the amount of the flow passage area smaller than usual by providing the small cross-sectional area portion. It is possible to reliably prevent the fluid from leaking to the outside.

In addition to the effect of the first aspect, the small valve according to the second aspect absorbs a manufacturing error in a communicating portion between the small cross-sectional area portion and the flow passage formed between the flow passage portions by the valve body. It becomes easier to obtain a normal flow rate.

In addition to the effect of the first or second aspect, the small-sized valve according to the third aspect can reliably ensure a predetermined flow rate when the fluid flow in the flow path portion is in the fully open state.

In addition to the effect according to any one of claims 1 to 3, the small-sized valve according to claim 4 is a separate member when a separate member such as a pipe is inserted into the flow path portion from its outer end. Since the tip of the abuts against the step portion of the small cross-sectional area portion and does not hit the valve body, the valve body can be protected.

In addition to the effect according to any one of claims 1 to 4, the small valve according to claim 5 prevents the valve element from moving in an unnecessary direction, so that the valve element can be securely operated within a predetermined amount. It can be operated.

In addition to the effect according to any one of claims 1 to 5, the small valve according to claim 6 further improves the sealing property because the valve body container is pressed against the valve body by the fluid pressure. it can.

[Brief description of drawings]

FIG. 1 is a cutaway cross-sectional view showing a state in which a channel according to an embodiment of the present invention is opened.

FIG. 2 is a top view showing a state in which the flow path is open.

FIG. 3 is a top view showing a state in which a flow path of a modified example is opened.

[Explanation of symbols]

 1 Valve body 2 Valve body container 13 Step 14 Flow hole 22 Flow path 23 Fitting step 24 Small cross-section area

Claims (6)

[Claims] 1. A valve body that rotates or reciprocates a predetermined amount,
A valve body accommodating and supporting the valve body so that the operation is possible, and a valve body accommodating body having a flow passage formed so as to interlink with the valve body. In the small valve that opens or closes, at least one of the flow path portion with respect to the valve body is provided with a small cross-sectional area portion having a flow path area smaller than a normal flow path area at an inner end thereof. 2. The small valve according to claim 1, wherein the small cross-sectional area portion is formed so that the flow passage area is larger than the flow passage area of the flow passage formed between the flow passage portions by the valve body. 3. The small valve according to claim 1, wherein the valve body is provided with a flow hole portion that forms a flow passage between the flow passage portions. 4. The small valve according to claim 1, wherein the small cross-sectional area portion is formed so as to form a step with the flow passage portion. 5. A step portion is provided inside the valve body accommodating body so as to prevent the valve body from moving in an unnecessary direction, and a fitting step portion that is fitted to the step portion is provided on the valve body. Item 5. A small valve according to any one of items 1 to 4. 6. The miniature valve according to claim 1, wherein the valve body containing body is formed of a soft material.