JP2005069366A - Valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve capable of providing surer shut-off performance without increasing dimension thereof. <P>SOLUTION: In this valve, a valve seat 6 is provided inside a valve body 1, and a valve element 11 supported by a valve spindle 10 abuts on the valve seat 6 and separates from it. The valve seat 6 is formed of a plurality of valve seat parts 6a and 6b arranged around the valve hole 7 and having a different diameter. The valve element 11 is formed of a plurality of valve element parts 11a and 11b having a different diameter and for abutting on a plurality of valve seat parts 6a and 6b forming the valve seat 6. Any one of the valve seat parts 6a, 6b and the valve element parts 11a, 11b abutting on each other is formed from a rigid material, and the other thereof is formed from an elastic material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a valve used as a shutoff valve, a check valve or the like.

  In a device that uses a fluid, various valves are usually used to control the flow of the fluid. When shutting off the flow of fluid, it is used as a shut-off valve when controlling the opening and closing of the flow path, and as a check valve when shutting off the back flow of fluid.

  As these valves, there is a valve in which a valve seat is provided in a valve box, and a valve body supported by a valve shaft contacts and separates from the valve seat. In general, such a valve has a structure in which one valve seat and one valve body that comes into contact with and separates from the valve seat are provided. (For example, refer to Patent Document 1).

According to the valve having such a structure, when the valve body is not completely brought into contact with the valve seat due to dust biting or other causes, and the blocking performance is impaired, fluid leakage and backflow cannot be prevented. There was a problem. For this reason, recently, in order to obtain a more reliable blocking effect, a double valve structure is formed by incorporating two valve bodies of an upstream valve portion and a downstream valve portion in series in the flow path in the valve box. It has been tried.
JP-A-5-79571

  However, in a valve having a double valve structure in which two valve bodies of an upstream valve portion and a downstream valve portion are connected in series in the flow path in the valve box as described above, an increase in size is inevitable. There is a problem in that the configuration is complicated and the manufacturing takes time and costs increase.

  The objective of this invention is providing the valve | bulb which can acquire more reliable interruption | blocking property, without enlarging.

  In order to achieve the above object, according to the first aspect of the present invention, a valve seat is provided in the valve box, and the valve body supported by the valve shaft contacts and separates from the valve seat. In the valve, the valve seat is composed of a plurality of valve seat portions having different diameters with the valve hole as a center, and the valve body has different diameters in contact with the plurality of valve seat portions constituting the valve seat. In the valve seat part and the valve body part which are constituted by a plurality of valve body parts, either one is made of a rigid material, and the other is made of an elastic material.

  When the valve seat part which comprises the said valve seat is formed with the elastic material, the contact surface with the valve body part of this valve seat part is concentric. It is characterized by having a linear protrusion protruding in a ring shape.

  The invention according to claim 3 is a cylindrical valve body support according to claim 1 or 2, wherein a spherical body is integrally provided at a tip of the valve shaft, and the spherical body is fitted to the valve shaft. A tip of the body is swingably supported, and the valve body is supported by the valve body support.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the valve body support body is biased by a compression spring and is supported in contact with a spherical body provided at the tip of the valve shaft. Features.

  According to the valve of the first aspect of the present invention, the valve seat is provided in the valve box, and the valve body supported by the valve shaft contacts and separates from the valve seat. In the valve, the valve seat is composed of a plurality of valve seat portions having different diameters around a valve hole, and the valve body is a plurality of valves having different diameters that abut against the plurality of valve seat portions constituting the valve seat. Since it is constituted by a body part, when shut off, the valve seat and the valve body come into contact with a plurality of valve seat parts and valve body parts having different diameters, and the contacted valve seat part and valve body part In this case, either one is formed of a rigid material and the other is formed of an elastic material, so that dust or the like is sandwiched between the one valve seat portion and the valve body portion that are in contact with each other, thereby blocking off. Even if it becomes incomplete, the valve seat part or the valve body part made of an elastic material is deformed to cause another valve seat part and the valve body part to be deformed. Contact, thereby blocking the flow path is ensured, reliable barrier properties can be obtained.

  Furthermore, the valve seat is composed of a plurality of valve seat portions having different diameters, and the valve body is composed of a plurality of valve body portions having different diameters that abut against the plurality of valve seat portions constituting the valve seat. Therefore, the configuration is simple, and there is no increase in size and cost as in the case of a double valve structure incorporated in series.

  According to the valve of the second aspect of the invention, when the valve seat portion constituting the valve seat is formed of an elastic material, the contact surface of the valve seat portion with the valve body portion is concentric. Since the linear protrusion provided in an annular shape is provided on the contact portion of the valve seat, the linear protrusion is provided when the valve body comes into contact with the linear protrusion provided on the contact surface of the valve seat. The contact pressure increases, and the blocking performance can be further improved.

  According to the valve of the third aspect of the present invention, a spherical body is integrally provided at the tip of the valve shaft, and the tip of the cylindrical valve body support body fitted to the valve shaft on the spherical body. Since the valve body is supported by the valve body support, the direction of the valve body can be freely changed at the tip of the valve shaft, and the valve body can be securely mounted on the valve seat. It can be made to contact.

  In the valve according to the invention described in claim 4, since the valve body support body is urged by a compression spring and is supported in contact with a spherical body provided at the tip of the valve shaft, The body can be brought into contact with the valve seat more reliably.

  FIGS. 1 to 3 show an example of the best mode for carrying out the present invention. FIG. 1 is a longitudinal sectional view of the valve of this example, and FIG. 2 is a valve seat and a valve constituting the main part of FIG. FIG. 3 is an enlarged cross-sectional view of a main part of a valve seat portion formed of an elastic material used in this example.

  The valve of this example is a valve used as a shut-off valve. The valve box 1 is provided with a fluid inlet part 2 connected to a supply side pipe and a fluid outlet part 3 connected to a discharge side pipe. A flow path 4 connecting the inlet portion 2 and the fluid outlet portion 3 is provided.

  A partition wall 5 is provided in the valve box 1 to partition the flow path 4 into the fluid inlet 2 side and the fluid outlet 3 side. An annular valve seat 6 is provided in the partition wall 5, and a valve hole 7 is provided in the center of the valve seat 6 so as to penetrate the fluid inlet portion 2 side and the fluid outlet portion 3 side in the vertical direction. Yes.

  The valve seat 6 includes a plurality of valve seat portions 6a and 6b having different diameters with the valve hole 7 as a center. In this example, a small-diameter valve seat portion 6a is provided on the lower side, and a large-diameter valve seat portion 6b is provided on the upper side of the valve seat portion 6a. The small-diameter valve seat portion 6a is made of an elastic material such as rubber, and the large-diameter valve seat portion 6b is made of a rigid material such as metal.

  More specifically, the valve seat 6 is made of a metallic cylindrical member 8, and the large-diameter valve seat portion 6 b is formed by an upper opening end portion of the cylindrical member 8. A small-diameter step portion 8a is formed on the inner circumference, and a small-diameter valve seat portion 6a made of the elastic material is provided on the small-diameter step portion 8a. The small-diameter valve seat 6a formed of the elastic material includes two linear protrusions 9 that are concentrically and annularly provided on a contact surface with a later-described valve body. .

  The valve body 11 supported by the valve shaft 10 is provided so as to abut against and separate from the valve seat 6 configured as described above. The valve body 11 is configured by a plurality of disc-shaped valve body portions 11a and 11b having different diameters that come into contact with the plurality of valve seat portions 6a and 6b constituting the valve seat 6.

  In this example, the small-diameter valve body portion 11a that contacts the small-diameter valve seat portion 6a of the valve seat 6 and the large-diameter valve body portion 11b that contacts the large-diameter valve seat portion 6b of the valve seat 6 are The small-diameter valve body portion 11 a is placed on the lower side and is stacked up and down and is integrally supported by the valve body support body 12. The valve body support 12 is formed in a cylindrical shape that can be loosely fitted to the valve shaft 10, and the small-diameter valve body portion 11 a is provided at the tip of the cylindrical valve body support 12. The large-diameter valve body portion 11b is fitted to the outer periphery of the valve body support body 12 so as to cover the outer periphery of the valve body portion 11a. Overlaid and fixed. The small-diameter valve body portion 11a is formed of a rigid material such as metal, and the large-diameter valve body portion 11b is formed of an elastic material such as rubber. Further, a disc-shaped valve holding portion formed of a metal plate or the like for preventing deformation of the large-diameter valve body portion 11b is disposed on the large-diameter valve body portion 11b formed of an elastic material such as rubber. 13 are stacked.

  The valve shaft 10 that supports the valve body support body 12 is integrally provided with a spherical body 14 at the front end thereof, and a front end portion of the valve body support body 12 fitted from the rear end side of the valve shaft 10 is provided. The spherical body 14 is in contact with the spherical body 14 to prevent it from coming off, and the tip of the valve body support 12 is supported by the spherical body 14 in a swingable manner. A spring receiver 15 is provided in the middle of the valve shaft 10, and a compression spring 16 is interposed between the spring receiver 15 and the valve body support 12. The valve body support 12 is attached to the compression spring 16. It is urged and is in contact with and supported by the spherical body 14.

  Furthermore, in this example, a compression spring 17 that urges the valve body 11 in a direction to contact the valve seat 6 and an electromagnetic valve opening means 18 that separates the valve body 11 from the valve seat 6 with a magnetic force are provided. .

  A compression spring 17 that urges the valve body 11 in a direction to contact the valve seat 6 is interposed between a plunger receiving plate, which will be described later, and a valve holding portion 13 of the valve body 11. The valve body 11 is pressed in the direction of the valve seat 6 through 13.

  Further, in the electromagnetic valve opening means 18, an electromagnetic action caused by energization of the electromagnetic coil 19 provided at the rear end portion (upper side in the drawing) of the valve shaft 10 and the solenoid 20 that operates the electromagnetic coil 19. And a plunger 21 made of an iron core that is sucked and moved. The valve body 11 is separated from the valve seat 6 against the elastic force of the compression spring 17 by the plunger 21 that is attracted and moved by the electromagnetic action due to the energization of the electromagnetic coil 19. When the power is turned off, the plunger 21 is released from the electromagnetic action, and the valve body 11 is urged by the compression spring 17 and comes into contact with the valve seat 6. The solenoid 20 is provided outside the valve box 1 and is covered with a cover 22. In addition, the valve box 1 is provided with a plunger receiving plate 23 that restricts the movement of the plunger 21 in the direction of the valve body 11 so that the weight of the plunger 21 is not applied to the valve body 11 when the electromagnetic coil 19 is not energized.

  According to the valve having such a configuration, the small-diameter valve body portion 11a constituting the valve body 11 and the large-diameter valve seat portion 6b are separated from the small-diameter valve seat portion 6a and the large-diameter valve seat portion 6b constituting the valve seat 6 when shut off. Since the valve body portion 11b contacts and performs two-stage sealing, the blocking performance is improved, and the small-diameter valve seat portion 6a is made of an elastic material such as rubber, and the large-diameter valve seat portion 6b is made of metal. On the other hand, the small-diameter valve body portion 11a that is in contact with these is formed of a rigid material such as metal, and the large-diameter valve body portion 11b is formed of an elastic material such as rubber. Therefore, even if dust or the like is sandwiched between the small-diameter valve seat portion 6a and the small-diameter valve body portion 11a and the shut-off is incomplete, the small-diameter valve seat formed of an elastic material such as rubber is used. Due to the deformation of the portion 6a, the large-diameter valve seat portion 6b and the large-diameter valve body portion 11b abut securely, or the large-diameter Even if dust or the like is sandwiched between the valve seat portion 6b and the large-diameter valve body portion 11b and the shut-off is incomplete, the large-diameter valve body portion 11b formed of an elastic material such as rubber is used. By deforming, the small-diameter valve seat portion 6a and the small-diameter valve body portion 11a are surely brought into contact with each other, whereby the blockage of the flow path 4 is ensured and a reliable blocking property is obtained.

  Further, the contact surface of the small-diameter valve seat portion 6a formed of an elastic material such as rubber with the small-diameter valve body portion 11a is provided with a linear projection portion 9 that is concentrically protruded in an annular shape. Therefore, when the small-diameter valve body portion 11a comes into contact with the linear projection portion 9 provided on the contact surface of the small-diameter valve seat portion 6a, line contact occurs, and the contact pressure of the linear projection portion 9 increases, thereby blocking. Property can be further improved.

  A spherical body 14 is integrally provided at the distal end of the valve shaft 10, and a distal end portion of a cylindrical valve body support 12 fitted to the valve shaft 10 is swingably supported by the spherical body 14. Since the valve body 11 is supported by the valve body support body 12, the direction of the valve body 11 can be freely changed at the tip of the valve shaft 10, and the valve body 11 is reliably brought into contact with the valve seat 6. Can be made.

  Further, since the valve body support 12 is urged by the compression spring 16 and is supported in contact with the spherical body 14 provided at the tip of the valve shaft 10, the valve body 11 is more securely attached to the valve seat 6. It can be made to contact.

  In this example, the valve seat 6 and the valve body 11 are composed of two valve seat portions 6a and 6b and two valve body portions 11a and 11b. However, the number may be two or more. The small-diameter valve seat portion 6a is made of an elastic material such as rubber, and the large-diameter valve seat portion 6b is made of a rigid material such as metal. On the other hand, the small-diameter valve body portion 11a that contacts these is made of metal. The large-diameter valve body portion 11b is formed of an elastic material such as rubber. However, the present invention is not limited to this, and the valve seat portions 6a and 6b and the valve body portion to be in contact with each other. 11a and 11b, one of which may be formed of a rigid material and the other of which is formed of an elastic material. For example, the valve seat portions 6a and 6b are formed of a rigid material, and the valve body portions 11a and 11b 11b elastic material may be used.

  Moreover, although the valve used as a shut-off valve is shown in this example, the present invention is naturally applicable to a valve used as a check valve.

The longitudinal cross-sectional view which showed an example of the best form of the valve | bulb for implementing this invention. The enlarged longitudinal cross-sectional view which shows the valve seat which makes the principal part of FIG. 1, and the site | part of a valve body. The principal part expanded sectional view of the valve seat part formed with the elastic material used by this example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve box 2 Fluid inlet part 3 Fluid outlet part 4 Flow path 5 Partition wall 6 Valve seat 6a Small-diameter valve seat part 6b Large-diameter valve seat part 7 Valve hole 8 Tubular member 8a Small-diameter step part 9 Linear protrusion part 10 Valve shaft 11 Valve body 11a Small diameter valve body section 11b Large diameter valve body section 12 Valve body support 13 Valve holding section 14 Spherical body 15 Spring receiver 16 Compression spring 17 Compression spring 18 Electromagnetic valve opening means 19 Electromagnetic coil 20 Solenoid 21 Plunger 22 Cover 23 Plunger receiving plate

Claims (4)

  In a valve in which a valve seat is provided in a valve box, and a valve body supported by a valve shaft contacts and separates from the valve seat, the valve seat has a different diameter around a valve hole. The valve body is composed of a plurality of valve body portions having different diameters that abut against the plurality of valve seat portions constituting the valve seat, and the abutting valve seat portion and the valve body One of the parts is made of a rigid material and the other is made of an elastic material.   When the valve seat part which comprises the said valve seat is formed with the elastic material, the contact surface with the valve body part of this valve seat part is provided with the linear protrusion part protrudingly provided by the annular | circular shape concentrically. The valve according to claim 1.   A spherical body is integrally provided at the distal end of the valve shaft, and a distal end portion of a cylindrical valve body support body fitted to the valve shaft is swingably supported by the spherical body. The valve according to claim 1 or 2, wherein the valve body is supported.   The valve according to claim 3, wherein the valve body support is urged by a compression spring and is in contact with and supported by a spherical body provided at a tip of the valve shaft.

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