JPH11304014A - Ball cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items by eliminating a seal member brought into contact with the inner circumferential surface of a passing hole while securing seal force in a clearance among the inner circumferential surface of the passing hole of a main body and peripheral surfaces of valve seats so as to prevent fluid leakage from the circumference of a spring member to a center chamber between both the valve seats. SOLUTION: In this ball cock equipped with a main body 3 having a passing hole 8, valve seats 5 arranged on both opening sides in the passing hole 8, a valve element 4 rotatively supported between these valve seats 5 and having a communicating hole 10 in its inside and a spring member 6 arranged in at least one of the valve seats 5 and pushes and presses the valve seat 5 toward the valve element 4, projected seal parts 53, 54 for preventing fluid leakage from a clearance between the peripheral surface 51 of the valve seat 5 and the inner circumferential surface 81 of the passing hole 8 are formed on the peripheral surface 51 of the valve 5 on a side where the spring member 6 is positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball cock used for opening and closing a fluid passage, and more particularly to a ball cock for preventing fluid leakage from around a spring member which presses a valve seat toward a valve body. It is.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 1 and FIG.
The fluid pipes (not shown) are connected to both openings 24 of the through hole 23. A ring-shaped valve seat 25 is disposed inside each of the openings 24 of the through hole 23, and a spherical valve body 26 having a communication hole 27 passing horizontally through a central portion between the valve seats 25 rotates. It is freely supported. A handle 28 is connected to the valve body 26, and the valve body 26 is rotated by the handle 28 to open and close a fluid passage. FIG. 11 shows an open state of the fluid passage, and FIG.
Reference numeral 2 denotes a closed state of the fluid passage.

Since the ball cock 21 opens and closes the fluid passage by rotating the valve body 26 as described above, the valve seat 25 is worn by repeating the rotation of the valve body 26, and the valve body 26 is worn. Fluid leakage may occur due to a decrease in the sealing force between the valve seat 25 and the valve seat 25. Therefore, in order to prevent such fluid leakage, at least one of the valve seats 25 is provided with a spring member 29 for constantly pressing the valve seat 25 toward the valve body 26, and the valve body 26 and the valve seat 25 are connected to each other. The sealing force between them is kept constant irrespective of the wear of the valve body 26. FIGS. 11 and 12 show an example in which spring members 29 are provided for the valve seats 25 on both sides.

However, since the spring member 29 is made of a disc spring, a leaf spring, or the like, and it is difficult to mount the spring member 29 in close contact with an adjacent member due to its shape and role, fluid leakage from the periphery of the spring member 29 occurs. Easy to occur. Therefore, it is necessary to provide a means for preventing fluid leakage on the valve body 26 side of the spring member 29 in order to prevent fluid leakage to the outside of the ball cock 21.

Therefore, for example, in the ball cock disclosed in Japanese Utility Model Laid-Open Publication No. Sho 53-19837, fluid leaking from the periphery of the spring member 29 causes the inner peripheral surface of the through hole 23 and the outer peripheral surface of the valve seat 25 to pass through. Of the central chamber 30 between the valve seats 25 on both sides
A seal member 31 is provided on the outer peripheral surface of the valve seat 25 so as to be in contact with the inner peripheral surface of the through hole 23 in order to prevent the gas from flowing into the valve seat 25.
As the seal material 31, for example, an O-ring material made of resin or the like is used. In the ball cock disclosed in Japanese Utility Model Laid-Open Publication No. 61-198776, a spring receiver is provided between a spring member 29 and a valve seat 25 such that the outer peripheral surface thereof is in contact with the inner peripheral surface of the through hole 23. Reference numeral 29 denotes a structure for pressing the valve seat 25 via a spring receiver.
Fluid leaking from the periphery of the central chamber 3 between the valve seats 25 on both sides.
In order to prevent the oil from flowing into the outer periphery of the through hole 23, a seal member is provided on the outer peripheral surface of the spring receiver so as to be in contact with the inner peripheral surface of the through hole 23.

[0006]

According to the ball cock according to the above-mentioned conventional example, in order to prevent fluid leakage from the periphery of the spring member to the central chamber between the valve seats on both sides, the inside of the through hole is formed on the valve body side of the spring member. A sealing material is provided in contact with the peripheral surface. However, the sealing material is made of a separate member from the main body and the valve seat, and the use of such a sealing material leads to an increase in the number of parts. Furthermore, the necessity of assembling the sealing material as a separate member increases the number of assembling operations.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an object to prevent a fluid leaking from a periphery of a spring member to a central chamber between valve seats on both sides of the body. It is an object of the present invention to eliminate the sealing material in contact with the inner peripheral surface of the through hole, reduce the number of parts, and improve the assembly workability, while securing the sealing force of the gap between the outer peripheral surface of the seat and the seat. .

[0008]

Means for solving the above problems are as follows. That is, the ball cock described in claim 1 has a main body having a through hole, valve seats disposed at both opening sides in the through hole, and is rotatably supported between these valve seats to be provided therein. In a ball cock including a valve body having a communication hole and a spring member provided for at least one of the valve seats and pressing the valve seat toward the valve body, a side on which the spring member is located A convex seal portion for preventing fluid leakage from between the outer peripheral surface and the inner peripheral surface of the through hole is formed on the outer peripheral surface of the valve seat.

According to a second aspect of the present invention, in the configuration of the first aspect, the convex seal portion is provided on an outer peripheral surface of a valve seat formed to be smaller than an inner peripheral diameter of the through hole. The diameter of the outer peripheral end of the convex portion is set to be larger than the inner peripheral diameter of the through hole.

According to a third aspect of the present invention, in the ball cock according to the first aspect, the convex seal portion is provided at an outer peripheral end of the valve seat on a side where the spring member is located, Due to the pressing force, the protruding portion is formed so as to be raised outward in the radial direction and pressed against the inner peripheral surface of the through hole.

According to a fourth aspect of the present invention, in the configuration of the first aspect, the convex seal portion is provided on an outer peripheral surface of a valve seat formed to be smaller than an inner peripheral diameter of the through hole. A first convex seal portion in which the diameter of the outer peripheral end of the convex portion is set to be larger than the inner peripheral diameter of the through hole, and an outer peripheral side end portion of the valve seat on which the spring member is located;
And a second convex seal portion which is erected radially outward by the pressing force of the spring member and pressed against the inner peripheral surface of the through hole.

According to a fifth aspect of the present invention, in the ball cock according to the first aspect, the ball cock is provided with the spring member for only one of the valve seats, and the other valve seat is provided. Has the same shape as one of the valve seats.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ball cock according to an embodiment of the present invention will be described below with reference to FIGS. FIG.
2 shows a ball cock used when the fluid flows in only one direction. For convenience, the one-way opening type ball cock 1 is used here. FIGS. 3 and 4 show a ball cock used when the fluid flows in two directions. For convenience, the ball cock 2 is a two-way open type ball cock. The common parts will be described with the same reference numerals.

In both the one-way opening type ball cock 1 and the two-way opening type ball cock 2, the ball cock body 3 is composed of two members, and the first member 3a is provided with a primary opening 7a of the fluid passage.
The second member 3b has a central chamber 9 in which the valve body 4 is located, a secondary opening 7b of the fluid passage, and a shaft hole 13, and the first member 3a and the second member 3b are joined to form a main body. Form 3 The primary side opening 7a and the secondary side opening 7b of the main body 3 are provided at opposing positions to form both ends of the fluid passage, and together with the central chamber 9, a through hole 8 is formed in the main body 3.
The inner peripheral surfaces of the primary side opening 7a and the secondary side opening 7b are provided with tapered pipe threads, each of which is connected to a fluid pipe (not shown). The shaft hole 13 is provided in the upper part of the main body 3, and the valve shaft 12 penetrates therethrough. Valve shaft 12
The lower end is fixed to the valve body 4 and the upper end is fixed to the handle 11. By rotating the handle 11 around the valve shaft 12, the valve body 4 is rotated, and the fluid passages of the ball cocks 1 and 2 are closed. Open and close.

A primary valve seat 5a is disposed inside the primary opening 7a of the through hole 8, and a secondary valve seat 5b is disposed inside the secondary opening 7b. A spherical valve body 4 is rotatably supported between them. The valve body 4 has a communication hole 10 that extends horizontally through the center thereof. As shown in FIG. 1 or FIG. 3, when the fluid passages of the ball cocks 1 and 2 are opened, the primary opening 7 of the main body 3 is opened.
a, the communication hole 10, and the secondary side opening 7b are linearly communicated. Further, the valve body 4 is rotated by about 90 ° by rotating the handle 11.
When rotated, the communication between the primary opening 7a and the secondary opening 7b is interrupted by the valve body 4, as shown in FIG. Become closed. At this time, in the one-way opening type ball cock 1, as shown in FIG. 2, the secondary opening 7b and the exhaust hole 15 are communicated via the side hole 16 and the central chamber 9, and the secondary opening 7b is opened. The compressed air accumulated in the air pipe connected to 7b is exhausted to the outside.

As described above, since the opening and closing of the fluid passages of the ball cocks 1 and 2 are performed by turning the valve body 4, the valve seat 5 is worn by repeating the turning of the valve body 4, and the valve body 4 is opened and closed. A spring for always pressing the valve seat 5 toward the valve body 4 against at least one of the primary side valve seat 5a and the secondary side valve seat 5b in order to prevent the sealing force between the valve seat 5 and the valve seat 5 from decreasing. It is necessary to provide the member 6 and keep the sealing force between the valve body 4 and the valve seat 5 constant. Therefore, the one-way opening type ball cock 1 shown in FIGS. 1 and 2 includes the spring member 6 on the primary opening 7a side of the primary valve seat 5a. In the two-way opening type ball cock 2 shown in FIGS. 3 and 4, springs are provided on both the primary opening 7a of the primary valve seat 5a and the secondary opening 7b of the secondary valve seat 5b. A member 6 is provided.
In the present embodiment, a disc spring is used as the spring member 6, and the valve seat 5 is pressed via a spring receiver 14 for pressing the valve seat 5 uniformly. The spring member 6 is not limited to a disc spring, but may be another spring member as long as it can press the valve seat 5 toward the valve body 4.

When only one of the primary valve seat 5a and the secondary valve seat 5b is provided with the spring member 6, the opening provided with the spring member 6 is connected to the high pressure side of the fluid. This is because when the opening on the side provided with the spring member 6 is connected to the low pressure side of the fluid, the spring member 6 is compressed when the valve body 4 is pressed to the low pressure side by the pressure of the fluid, and the valve body 4 is moved to the low pressure side. This causes a gap between the valve seat 5 on the high pressure side and the valve element 4 to make it impossible to secure a sealing force.
Therefore, in the one-way opening type ball cock 1,
The primary side opening 7a is on the high pressure side of the fluid, and the secondary side opening 7b
Is connected to the low pressure side of the fluid so that the fluid flows from the primary side to the secondary side. On the other hand, in the bidirectional open-type ball cock 2, the primary opening 7a and the secondary opening 7b
Can be connected to the high voltage side.

Next, a spring member 6 such as the primary side valve seat 5a in the one-way opening type ball cock 1 or the primary side valve seat 5a and the secondary side valve seat 5b in the two-way opening type ball cock 2 is mounted. 5 to 10 for the valve seat 5 provided
It will be described based on. First, a first embodiment will be described. The valve seat 5 is made of a material having low friction and elasticity such as Teflon, and the outer peripheral surface 51 is fitted to the inner peripheral surface 81 of the through hole 8 provided in the main body 3 as shown in FIGS. ,
It is formed in a cylindrical shape that is short in the axial direction, and has a spherical concave portion 52 that fits with the spherical valve element 4 on one surface. Fluid leaking from the periphery of the spring member 6 is applied to the valve seats 5 on both sides.
In order to prevent inflow into the central chamber 9, the first convex seal portion 5 is provided on the outer peripheral surface 51 instead of the conventional seal material.
3 are formed. The first convex seal portion 53 is formed by integrally forming a convex portion along the outer peripheral surface 51 in a ring shape. In the present embodiment, the first convex seal portion 53 has a semicircular cross-sectional shape, but may have a rectangular or triangular cross-sectional shape.

The dimensions of the valve seat 5 are such that when the valve seat 5 is mounted in the through hole 8, the valve seat 5 can be easily mounted simply by bending the tip of the first convex seal portion 53. Therefore, as shown in FIGS. 5 and 6, the outer diameter D1 of the valve seat 5 is formed smaller than the inner diameter D3 of the through hole 8, and the first convex seal portion 53 before being mounted in the through hole 8. Is formed to be larger than the inner diameter D3 of the through hole 8.

Next, a second embodiment will be described. As shown in FIG. 7, the valve seat 5 according to this embodiment has a second convex seal portion 54 instead of the first convex seal portion 53. The second convex seal portion 54
The convex portion protruding in the direction of 45 ° with respect to the radial direction is integrally formed in a ring shape along the outer peripheral end of the valve seat 5 on the side where the spring member is located.

The second convex seal portion 54 is formed such that its upper end is substantially flush with the outer peripheral surface 51 of the valve seat 5 when the valve seat 5 is not mounted. 8, the second convex seal portion 54 is erected outward in the radial direction by the pressing force F of the spring member 6, and the inner peripheral surface 81 of the through hole 8 and the spring receiving member 8 as shown in FIG. 14. Therefore, when the valve seat 5 is inserted into the through hole 8, the convex seal portion can be smoothly inserted without hindering. In the present embodiment, the shape of the second convex seal portion 54 is substantially square in cross section. However, even if the second convex seal portion 54 has any other shape, it is raised by the pressing force of the spring member 6 so that the through hole 8 Any shape may be used as long as it is pressed against the inner peripheral surface 81, and the cross-sectional shape may be an arc shape or the like.

Further, when the valve seat 5 is mounted in the through hole 8,
A groove 5 is formed at the base of the convex portion of the second convex seal portion 54 so that the second convex seal portion 54 can be easily erected.
5 should be provided. Thereby, the second convex seal portion 5
Deformation near the root of the base 4 becomes easy, and the base 4 can be securely pressed against the inner peripheral surface 81 of the through hole 8 and the spring receiver 14.
There is no particular limitation on the shape of the concave groove 55.

Next, a third embodiment will be described. As shown in FIGS. 9 and 10, the valve seat 5 according to this embodiment is formed by providing both the first convex seal portion 53 and the second convex seal portion 54. By forming two different types of convex seal portions at two locations, the through-holes 8 can be formed.
It is an object of the present invention to be able to insert smoothly into the inside and to obtain a reliable sealing force.

The valve seat 5 without the spring member 6 like the secondary valve seat 5b in the one-way opening type ball cock 1 shown in FIGS. 1 and 2 prevents fluid leakage from around the spring member 6. Since there is no need to consider it, the convex seal portions 53, 54
It is not necessary to provide. However, by using the same valve seat 5 having the spring member 6 as the valve seat 5 having no spring member 6, the components can be shared.

[0025]

As described above, according to the first aspect of the present invention,
The ball cock according to the above, by forming a convex seal portion on the outer peripheral surface of the valve seat on the side where the spring member is located to prevent fluid leakage from between the outer peripheral surface and the inner peripheral surface of the through hole of the main body,
The sealing force between the main body and the valve seat can be secured with a simple configuration without using a sealing material such as an O-ring material which has been conventionally used as a separate member. Therefore, the number of parts can be reduced. Further, it is possible to improve the assemblability due to the reduced number of parts.

The ball cock according to the second aspect is the first aspect.
Wherein the convex seal portion is provided on the outer peripheral surface of the valve seat formed to be smaller than the inner peripheral diameter of the through hole of the main body, and the diameter of the outer peripheral end of the convex portion is set to the inner peripheral diameter of the through hole. When the valve seat is installed in the through hole, it can be easily installed simply by bending the tip of the convex seal part, and the sealing force can be secured with a simpler configuration. it can.

The ball cock according to claim 3 is the ball cock according to claim 1.
In the configuration of the above, the convex seal portion is provided at an outer peripheral end of the valve seat on the side where the spring member is located, and in a state where the valve seat is mounted in the through hole of the main body, the radial direction is generated by the pressing force of the spring member. It is elastically deformed so as to rise outward, and is pressed against the inner peripheral surface of the through hole to obtain a sealing force. Therefore, when the valve seat is mounted in the through hole, the convex seal portion does not hinder the mounting, so that the valve seat can be smoothly mounted and more reliable sealing force can be obtained.

According to a fourth aspect of the present invention, there is provided a ball cock.
Wherein the convex seal portion is provided on the outer peripheral surface of the valve seat formed to be smaller than the inner peripheral diameter of the through hole of the main body, and the diameter of the outer peripheral end of the convex portion is set to the inner peripheral diameter of the through hole. A first convex seal portion that is set larger than the first convex seal portion and an outer peripheral end portion of the valve seat on the side where the spring member is located, and is erected radially outward by a pressing force of the spring member to form the through hole. A more reliable sealing force can be obtained by forming the convex seal portions of two different types at two locations, which are composed of the second convex seal portions pressed against the inner peripheral surface.

According to a fifth aspect of the present invention, there is provided a ball cock.
In the configuration of the above, even if a spring member is provided for only one of the left and right valve seats of the valve body, the other valve seat has the same shape as the one valve seat. , Each valve seat can be a common part. As a result, the number of component types can be reduced, and errors during assembly can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a one-way opening type ball cock according to the present invention in a fluid passage open state.

FIG. 2 is a cross-sectional view showing a closed state of a fluid passage of the one-way opening type ball cock according to the present invention.

FIG. 3 is a cross-sectional view showing a two-way opening type ball cock according to the present invention in a fluid passage open state.

FIG. 4 is a cross-sectional view showing a closed state of the fluid passage of the two-way openable ball cock according to the present invention.

FIG. 5 is a sectional view showing a valve body according to the first embodiment of the present invention.

FIG. 6 is a sectional view showing a mounted state of the valve element according to the first embodiment of the present invention.

FIG. 7 is a sectional view showing a valve element according to a second embodiment of the present invention.

FIG. 8 is a sectional view showing a mounted state of a valve element according to a second embodiment of the present invention.

FIG. 9 is a sectional view showing a valve body according to a third embodiment of the present invention.

FIG. 10 is a sectional view showing a mounted state of a valve element according to a third embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a state in which a fluid passage of a conventional ball cock is opened.

FIG. 12 is a cross-sectional view showing a closed state of a fluid passage of a ball cock according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 One-way opening type ball cock 2 Two-way opening type ball cock 3 Ball cock main body 4 Valve body 5 Valve seat 6 Spring member 8 Through hole 9 Central chamber 10 Communication hole 11 Handle 14 Spring receiver 51 Outer peripheral surface of valve seat 53 First Convex seal part 54 Second convex seal part 81 Inner peripheral surface of through hole D1 Outer peripheral diameter of valve seat D2 Outer peripheral diameter of first convex seal part D3 Inner peripheral diameter of through hole

Claims (5)

[Claims] 1. A main body having a through hole, a valve seat disposed on each of both opening sides in the through hole, and a valve body rotatably supported between the valve seats and having a communication hole therein. A spring member provided on at least one of the valve seats and pressing the valve seat toward the valve body, wherein a spring member is provided on an outer peripheral surface of the valve seat on the side where the spring member is located. A ball cock, wherein a convex seal portion is formed to prevent fluid leakage from between the outer peripheral surface and the inner peripheral surface of the through hole. 2. The convex seal portion is provided on an outer peripheral surface of a valve seat formed to be smaller than an inner peripheral diameter of the through hole, and a diameter of an outer peripheral end of the convex portion is changed to an inner peripheral diameter of the through hole. The ball cock according to claim 1, wherein the ball cock is set to be larger than the diameter. 3. The convex seal portion is provided at an outer peripheral end of the valve seat on a side where the spring member is located, and is raised radially outward by a pressing force of the spring member to form the through-hole of the through hole. The ball cock according to claim 1, which is pressed against the inner peripheral surface. 4. The convex seal portion is provided on an outer peripheral surface of a valve seat formed to be smaller than an inner peripheral diameter of the through hole, and a diameter of an outer peripheral end of the convex portion is changed to an inner peripheral diameter of the through hole. A first convex seal portion set to be larger than a diameter, and an outer peripheral end portion of the valve seat on a side where the spring member is located; 2. The ball cock according to claim 1, comprising a second convex seal portion pressed against the inner peripheral surface of the hole. 5. The ball cock according to claim 1, wherein the spring member is provided for only one of the valve seats, and the other valve seat has the same shape as the one valve seat.
The described ball cock.