JP2003262281A - Switch valve and sealing component therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch valve 1 that can retrain occurrence of torsion by friction in packing members 13, 14 at the time of rotation of a rotor 3 and accordingly can improve an endurance and a sealing performance of the packing members 13, 14, in the switch valve 1 that is inside of each of ports 4, 5 and arranges each of packing members 13, 14 for seal between a body 2 and also the rotor 3, besides the rotor 3 with openings 9, 10 communicating to the above ports 4, 5 is combined with the inside of the body 2 with plural ports 4, 5 so as to be rotatable. <P>SOLUTION: A seal component 11 that the above plural packing members 13, 14 adhered to one of a frame 12 in advance is provided, and this seal component is fixed to attachable or detachable to an installation slot 2f inside of the body 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve, which is a type of valve device, and a sealing part used as a constituent element of the switching valve. The switching valve of the present invention is used, for example, as a hot and cold water mixing valve or as a switching valve for other general fluids.

[0002]

2. Description of the Related Art Conventionally, a rotor having an opening communicating with the port is rotatably combined inside a body having a plurality of ports, and the rotor is provided inside each of the ports and between the body and the rotor. A switching valve in which a seal packing is arranged is known.

However, in this conventional switching valve, since the plurality of sealing packings are separate parts and are separately installed between the body and the rotor, the rotor rotates during the operation of the switching valve. Then, twisting due to friction occurs in each packing, and the twisting may cause wear and cracks in the packing, which may damage the packing and cause seal leakage. This problem is particularly likely to occur in a tap water switching valve in which the use of lubricating oil or the like is restricted.

[0004]

In view of the above points, the present invention can prevent the packing from being twisted due to friction during the rotation of the rotor, thereby improving the durability of the packing and improving the sealing property. An object of the present invention is to provide a switching valve and a sealing member for a switching valve that can be improved.

[0005]

To achieve the above object, a switching valve according to claim 1 of the present invention rotates a rotor having an opening communicating with the port inside a body having a plurality of ports. In a switching valve that is combined as much as possible, and in which seal packings are arranged between the body and the rotor inside each of the ports,
It is characterized in that it has a seal component in which the plurality of packings are fixed to one frame in advance, and the seal component is detachably mounted in a mounting groove provided on the inner surface of the body.

According to a second aspect of the present invention, there is provided a switching valve sealing component, wherein a rotor having an opening communicating with the port is rotatably assembled inside a body having a plurality of ports, and each of the ports is provided. A seal component used for a switching valve inside of which a seal packing is arranged between the body and a rotor, wherein the plurality of packings are fixed to one frame in advance,
It is characterized in that it is removably mounted in a mounting groove provided on the inner surface of the body.

In the switching valve according to the first aspect of the present invention having the above-mentioned structure, the packing is preliminarily fixed to the frame to form a seal component, and the seal component is detachably attached to the attachment groove provided on the inner surface of the body. Since the packing is supported by the frame, it is possible to prevent the packing from being twisted due to friction during rotation of the rotor.

A second aspect of the present invention having the above structure.
In the switching valve seal component according to (1), since the seal component is preliminarily fixed to the frame and is detachably mounted in the mounting groove provided on the inner surface of the body, the packing is also Since it is supported by the frame, it is possible to prevent the packing from being twisted due to friction when the rotor rotates.

The present application includes the following technical matters.

That is, in order to achieve the above object, one switching valve proposed by the present application has the following contents.

Each packing of the rotary sliding portion is adhered or engaged and fixed to one frame. The frame is made of a material such as thin metal or resin that is more rigid than the packing. Since the frame is formed according to the shape of the groove to be mounted or has a lower rigidity than the material of the mounting groove, it is easily deformed according to the shape of the groove during mounting. It is possible to set irregular shapes such as grease accumulation on the packing. The mounting groove is arranged so as to surround the opening of the valve, and the mounting grooves are all connected. The packing is adhered or engaged and fixed along the outer circumference or the inner circumference of the frame.

According to the switching valve having the above structure, the following operational effects can be obtained.

Since the packing is adhered or engaged and fixed to one frame, it is difficult for the packing to be deformed even if it receives torsional stress due to friction. Since the packing is adhesively fixed to one frame, there is no deformation during assembly and it is easy to install in the groove. Easy to replace packing.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a front view of a switching valve according to an embodiment of the present invention, a side view of which is shown in FIG. 2 and a sectional view taken along the line AA in FIG. 1 is shown in FIG. ing. Further, FIG. 4 is a single part view of a seal part incorporated in the switching valve, (A) is a front view thereof, and (B) is (A).
13 is a sectional view taken along line BB in FIG.
The sectional views taken along the line C are shown respectively.

The switching valve 1 according to this embodiment is used as a hot and cold water mixing valve or a flow path switching valve for general fluid (three-port switching valve), and is configured as follows.

That is, first, as shown in FIGS. 1 to 3, a body 2 having a cylindrical hollow portion 2a is provided, and inside the body 2, a rotor 3 acting as a valve body has a central axis line. It is assembled so that it can be rotated around.

The body 2 is formed by integrally molding cylindrical or annular bearing portions 2c and 2d at both axial ends of a cylindrical casing portion 2b. A port 4 and a second port 5 are provided. Both ports 4 and 5 are formed as through holes penetrating the peripheral surface 2e of the body 2 in the thickness direction, and are arranged in the axial direction at the same circumferential position.

The rotor 3 is a valve body 3 having a cylindrical shape with a bottom.
An annular flange portion 3b is integrally formed at one axial end of a and the axial portion 3 projecting to the outside of the body 2 at the other axial end.
c is integrally molded, the flange portion 3b is slidably arranged on the inner peripheral side of one bearing portion 2c, and the shaft portion 3c is slidable on the inner peripheral side of the other bearing portion 2d. By being arranged, the rotor 3 as a whole is rotatable with respect to the body 2 about its central axis.
Between the flange portion 3b and the bearing portion 2c and the shaft portion 3c
Annular seal parts 6 and 7 each made of an O-ring or the like are assembled between the bearing 2d and the bearing 2d.

One end of the valve body portion 3a in the axial direction and the inner peripheral side of the flange portion 3b are open, and a third port 8 is provided therein. A first opening 9 and a second opening 10 are provided on the peripheral surface 3d of the valve body 3a. Both openings 9 and 10 are formed as through holes penetrating the peripheral surface portion 3d of the rotor 3 in the thickness direction, and are arranged in the axial direction at positions different from each other in the circumferential direction. The parts 9 and 10 are arranged so as to be displaced by 90 degrees in the circumferential direction. The first opening 9 allows the rotor 3 to rotate and the first port 4 to rotate.
When the rotor 3 rotates and the second port 5 is aligned with the second port 5, the first port 4 is opened when the second position is aligned with the second port 5. Open port 5.

A seal component 11 shown in FIG. 4 is assembled inside the first port 4 and the second port 5 provided on the peripheral surface 2e of the body 2 and between the body 2 and the rotor 3.

In this seal component 11, a first packing 13 arranged inside the first port 4 and a second packing 14 arranged inside the second port 5 are integrally fixed to a frame 12 in advance. In more detail, it is configured as follows.

That is, first, a frame (also referred to as a substrate) 12 is formed in a flat plate shape by a rigid material such as metal or resin (for example, a thin plate of stainless steel plate (SUS)), and the first port 4 is formed in the plane thereof. Corresponding first through hole 1
5 and the second through hole 16 corresponding to the second port 5 are provided so as to penetrate in the thickness direction. Therefore, the frame 12 includes an upper frame 12a and a lower frame 12b each having a length corresponding to two packings 13 and 14, and packings 13 and 1
Left and right side frames 12c, 12d and a middle frame 1 having a length of one
2e and 2e are integrated.

The first packing (also referred to as the first seal lip) 13 is made of a rubber-like elastic material (for example, HNBR rubber) in an endless shape, and is fixed to the outer peripheral edge portion of the upper frame 12a half of the frame 12. Portion 13a, a portion 13b fixed to the outer peripheral edge of the side frame 12c, and the lower frame 1
The portion 13c fixed to the outer peripheral edge of the 2b half body and the middle frame 1
A portion 13d fixed to the center of the width direction 2e is integrally formed and vulcanized and bonded to the frame 12. The fixing means may be vulcanization adhesion, adhesion with an adhesive, engagement, fitting, or the like. Further, ribs for preventing grease flow may be provided on the inner and outer circumferences thereof.

The second packing (also referred to as the second seal lip) 14 is also made of a rubber-like elastic material (for example, HNB).
A part 14a fixed to the outer peripheral edge of the upper frame 12a half of the frame 12 and a part 14 fixed to the outer peripheral edge of the side frame 12d.
b and a portion 14 fixed to the outer peripheral edge of the lower frame 12b half body
c and a portion 14d fixed to the center of the middle frame 12e in the width direction
And are integrally bonded to the frame 12 by vulcanization. The fixing means may be vulcanization adhesion, adhesion with an adhesive, engagement, fitting, or the like. Further, ribs for preventing grease flow may be provided on the inner and outer circumferences thereof.

The portion 13d fixed to the middle frame 12e of the first packing 13 and the portion 14d fixed to the middle frame 12e of the second packing 14 are integrally formed with each other. In other words, both 13d and 14d are integrally formed. The parts are shared with each other. Therefore, the first packing 13 and the second packing 14 may be integrally molded with each other.

The first packing 13 and the second packing 14 are formed in an O-ring shape having a circular cross section as shown in FIGS. 4B and 4C, and are thicker than the plate thickness of the frame 12. The packings 3, 14
On the other hand, the frame 12 is arranged substantially at the center in the thickness direction.

The seal component 11 having the above structure is detachably mounted in the mounting groove 2f provided inside the peripheral surface 2e of the body 2. The mounting groove 2f is the peripheral surface 2e of the body 2.
Is formed in a concave shape so as to surround the first port 4 and the second port 5 inside, and is formed in a shape in which all are connected.

Further, as shown in FIG. 4B, the seal component 11 is curved in an arc shape along the peripheral surface 2e of the body 2.
1 may be formed in such a curved shape when it is manufactured, or may be processed in such a curved shape when the seal component 11 is assembled to the switching valve 1. Therefore, in any case, since the seal component 11 is formed in the curved shape in this way, the first packing 13 and the second packing 14 are in close contact with the inner surface of the body 2 and the outer surface of the rotor 3 over the entire circumference. Therefore, the fluid flowing through the ports 4 and 5 can be effectively sealed.

The switching valve 1 having the above-described structure appropriately switches the communication between the first port 4 and the third port 8 and the communication between the second port 5 and the third port 8 by rotating the rotor 3. The above-mentioned configuration is characterized in that the following operational effects are exhibited.

That is, first, in the switching valve 1 having the above-described structure, two packings, which are the first packing 13 and the second packing 13, are fixed to one frame 12 to form one sealing part 11, and one of these is used. Seal parts 11
Is configured to be removably mounted in a mounting groove 2f provided inside the peripheral surface 2e of the body 2, so that the packings 13 and 14 are supported by the frame 12, so that each packing is rotated when the rotor 3 rotates. It is possible to suppress the occurrence of twist due to friction in the members 13 and 14. Therefore, it is possible to prevent the packings 13 and 14 from being worn or cracked due to the twist, and thus the packings 1 and 14 can be prevented.
It is possible to prevent the seals 3 and 14 from being damaged and causing seal leakage. Therefore, the durability of each packing 13 and 14 can be improved, and the sealing performance can be improved.

Further, each packing 13, 14 is a frame 1
Since the packing 13 and 14 are fixed to No. 2 and supported by the frame 12, the packings 13 and 14 can be prevented from being deformed at the time of assembly. Therefore, the packings 13 and 14 can be easily assembled to the switching valve 1.

Further, since each packing 13 and 14 is collectively fixed to one frame 12, the packing 1
3, 14 can be easily attached to and detached from the switching valve 1, and the packings 13, 14 can be easily replaced with new ones.

Further, with respect to the seal component 11 having the above-mentioned structure, the seal component 11 has two packings consisting of the first packing 13 and the second packing 14 fixed to one frame 12 in advance, and the body 2 Circumference 2e
Since the packings 13 and 14 are removably mounted in the mounting groove 2f provided inside, the packings 13 and 14 are also supported by the frame 12, so that when the rotor 3 rotates, the packings 13 and 14 are rubbed by friction. It is possible to suppress the occurrence of twist. Therefore, it is possible to prevent the packings 13 and 14 from being worn or cracked due to this twist, and thus to prevent the packings 13 and 14 from being damaged and causing seal leakage. Therefore, the durability of each packing 13 and 14 can be improved, and the sealing performance can be improved.

Further, each packing 13, 14 is a frame 1
Since the packing 13 and 14 are fixed to No. 2 and supported by the frame 12, the packings 13 and 14 can be prevented from being deformed at the time of assembly. Therefore, the packings 13 and 14 can be easily assembled to the switching valve 1.

Since the packings 13 and 14 are collectively fixed to one frame 12, the packing 1
3, 14 can be easily attached to and detached from the switching valve 1, and the packings 13, 14 can be easily replaced with new ones.

[0037]

The present invention has the following effects.

That is, in the switching valve according to claim 1 of the present invention having the above structure, the packing is fixed to the frame in advance to form a seal component, and the seal component is attachable to and detachable from the mounting groove provided on the inner surface of the body. Since it is configured to be mounted on the packing, it is possible to support the packing by the frame, and it is possible to prevent the packing from being twisted due to friction when the rotor rotates.
Therefore, it is possible to prevent the packing from being worn or cracked due to the twist, and it is possible to prevent the packing from being damaged and causing seal leakage. Therefore, the durability of the packing can be improved and the sealing property can be improved.

Further, since the packing is fixed to the frame and supported by the frame, it is possible to prevent the packing from being deformed at the time of assembling, so that the packing assembling work can be facilitated. In addition, since the packings are collectively fixed to the frame, the packings can be easily attached and detached, and the packings can be easily replaced.

A second aspect of the present invention having the above structure.
In the switching valve sealing component according to (1), since the sealing component is preliminarily fixed to the frame and is removably mounted in the mounting groove provided on the inner surface of the body, the packing is also mounted. Since it can be supported by the frame, it is possible to prevent the packing from being twisted due to friction when the rotor rotates. Therefore, it is possible to prevent the packing from being worn or cracked due to the twist, and it is possible to prevent the packing from being damaged and causing seal leakage. Therefore, the durability of the packing can be improved and the sealing property can be improved.

Further, since the packing is fixed to the frame and supported by the frame, it is possible to prevent the packing from being deformed at the time of assembling, so that the packing assembling work can be facilitated. In addition, since the packings are collectively fixed to the frame, the packings can be easily attached and detached, and the packings can be easily replaced.

[Brief description of drawings]

FIG. 1 is a front view of a switching valve according to an embodiment of the present invention.

FIG. 2 is a right side view of the switching valve.

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

FIG. 4 is a single-part view of a seal part incorporated in the switching valve, in which (A) is a front view thereof, (B) is a sectional view taken along the line BB in (A), and (C) is in (A). CC sectional view

[Explanation of symbols]

1 Switching valve 2 Body 2a Hollow part 2b Casing part 2c, 2d Bearing part 2e, 3d Peripheral surface 2f Mounting groove 3 Rotor 3a Valve body part 3b Flange part 3c Shaft part 4 First port 5 Second port 6, 7 Annular seal part 8 Third Port 9 First Opening 10 Second Opening 11 Sealing Part 12 Frame 12a Upper Frame 12b Lower Frame 12c, 12d Side Frame 12e Middle Frame 13 First Packing 13a, 13b, 13c, 13d Parts of First Packing 14 2nd packing 14a, 14b, 14c, 14d Each part of 2nd packing 15 1st through-hole 16 2nd through-hole

Claims (2)

[Claims] 1. A rotor (3) having an opening (9) (10) communicating with the port (4) (5) inside a body (2) having a plurality of ports (4) (5). Rotatably combined, and a seal packing (13) (14) inside the ports (4) (5) between the body (2) and the rotor (3), respectively. In (1), there is a seal part (11) in which the plurality of packings (13) and (14) are fixed to one frame (12) in advance, and the seal part (11) is provided on the inner surface of the body (2). A switching valve that is detachably mounted in a mounting groove (2f) provided. 2. A rotor (3) having openings (9) (10) communicating with the ports (4) (5) inside a body (2) provided with a plurality of ports (4) (5). Rotatably combined, and a seal packing (13) (14) inside the ports (4) (5) between the body (2) and the rotor (3), respectively. A seal part (11) used in (1), comprising a plurality of packings (13) and (14) fixed to a frame (12) in advance, and mounted on the inner surface of the body (2). A seal part for a switching valve, which is detachably mounted in the groove (2f).