JP2000055213A - Selector valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light and inexpensive selector valve device using the inner peripheral surface of a lengthwise barrel part that uses an eccentric cam as a valve seat. SOLUTION: Since by a sliding piece 12b fitted with an eccentric cam 11, the lateral movement of a valve element 12 by the cam 11 is absorbed by the sliding piece 12b, only the movement of the valve element 12 by the cam 11 is taken out, and a pin 18 protrudedly provided on an arm 17b is engaged with the long hole of the supporting plate 12a of the valve element 12 to rotate the valve element 12; when a partitioning plate is faced to one side sleeve tube part 5 or branch tube to close them, rotating a valve spindle 10 moves the valve element 12 inward by a moving means provided on the valve spindle 10 to separate the partitioning plate 12c from the inner surface of the lengthwise barrel part 4. Since after that, the valve element 12 is turned by a turning means, thereby surely shortening a distance for avoiding the interference of a fluid tube 2 with a cutting part by the valve element 12, even the inner surface of the lengthwise barrel part 4 is adopted as a valve seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve device used for connecting a branch pipe to a fluid pipe such as a water main pipe without stopping the flow of the fluid pipe to change a fluid flow path.

[0002]

2. Description of the Related Art A conventional switching valve device used for this kind of waterless construction is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-219307.

[0003] This will be described with reference to FIGS. 8 and 9. A conventional switching valve device A is mounted at a branch position where the fluid pipe P is circularly cut by the drilling machine.

[0004] A vertical body B having an inner diameter larger than the outer diameter of the fluid pipe P, and a sleeve tube C provided continuously on both sides of the vertical body B.
The split T-shaped pipe E constituted by the fluid pipe P and the branch port D facing the side of the fluid pipe P has an upper and lower divided structure with a horizontal plane passing through the center of the fluid pipe P as a boundary. The flanges (not shown) provided at the opposite ends are connected to each other to be attached to the fluid pipe.

[0005] The vertical body B is attached to the fluid pipe P such that the center thereof and the center of the cutting hole are coaxial, and the upper end opening is closed by a valve lid F. Vertical body B
A valve shaft G is provided so as to be rotatably supported at its upper end by a valve lid F and at its lower end by a bottom wall of the vertical body B on the central axis line.

Eccentric cams H, H having the same shape and the same phase are fitted and fixed to the upper and lower ends of the valve shaft G located in the vertical body B.

A cylindrical portion at the base of a pair of upper and lower support plates J having a fan shape in the valve body I is rotatably fitted to the two eccentric cams H.

The peripheral edge of the support plate J has an arc-shaped cross section having substantially the same curvature as the inner diameter of the vertical body B, and the cut end surface K of the fluid pipe P can be accommodated in the center of the outer peripheral surface with a margin. A partition plate L having a rectangular or circular concave portion is integrally connected. A packing M that is in close contact with the inner surface of the vertical trunk portion B is embedded around the concave portion on the outer surface of the partition plate L.

A drive pinion N is fitted over the upper eccentric cam H of the valve shaft G, and the drive pinion N
Are meshed with a large-diameter driven gear O rotatably mounted on the valve cover F.

A pin R fixed downward to the outer peripheral portion of the driven gear O is connected to an elongated hole S formed in the upper support plate J in a radial direction on a center line substantially bisecting the upper support plate J. I agree.

According to the switching valve device A configured as described above, the valve element I shown in FIG. 9 closes the flow path of the left sleeve pipe C, and the flowing water flows from the right sleeve pipe C to the branch port D. When the valve shaft G is rotated from the state in which the eccentric cam H and the pin R
The valve element I is separated from the inner surface of the vertical torso portion B while rotating to the branch port D side by the action of the valve element I. When the shaft G is rotated, the valve body I gradually rotates toward the opening of the branch opening D while gradually approaching the inner surface of the vertical body B, and the central portion of the valve body I is the pipe axis of the branch opening D. Since the eccentric amount of the eccentric cam H in the direction of the branch port D becomes maximum when the eccentric cam H is substantially aligned with the center,
The valve element I is pressed toward the branch port D, and the packing M is pressed against the inner surface of the vertical body B, whereby the flow path on the branch port D side is closed and the flow path is switched.

[0012]

In the above-described switching valve device, the fluid pipe is pierced and cut by a hole saw having an outer diameter larger than the outer diameter of the fluid pipe and smaller than the inner diameter of the vertical body. Therefore, the cut portion of the fluid pipe will protrude inward from the inner peripheral surface of the vertical trunk portion, and if the inner peripheral surface of the vertical trunk portion is used directly as a valve seat, the cut portion will interfere with the valve body. There was a problem. In order to solve the problem, the above-described switching valve device employs an eccentric cam and has a structure in which the valve body does not interfere with the cutting portion, but since the valve body rotates and separates from the inner peripheral surface of the vertical body portion. In addition, it is necessary to increase the separation between the packing around the partition plate and the cutting section, and it is necessary to increase the inner diameter of the vertical body and the valve body, increasing the weight of the entire switching valve device and reducing the cost. There was a bulky problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and is a lightweight and inexpensive switching method using an inner peripheral surface of a vertical trunk portion using an eccentric cam as a valve seat. It is in providing a valve device.

[0014]

In order to solve the above-mentioned problems, a switching valve device according to the present invention has a split T-shaped pipe attached to a branch position of a fluid pipe, and the fluid pipe is pierced and cut at the branch position.
A switching valve device configured to switch a fluid flow path by inserting a valve body, wherein the split T-shaped pipe faces a pair of sleeve pipe sections connected to a vertical body and a side. A partition plate having a branch opening portion, and a concave portion formed on an outer surface thereof, which can accommodate a protruding end into the vertical trunk portion in the cut portion of the fluid pipe, and a fan-shaped plan view; A portion is constituted by a pair of upper and lower support plates rotatably supported by a valve shaft supported by a split T-tube, provided on a support portion of the valve body in the valve shaft, and formed integrally with the valve shaft. By an eccentric cam fitted with a sliding piece provided on the valve so as to be movable only in a direction perpendicular to the direction of advance and retreat of the valve, at least the partition plate faces one of the sleeve tube portions or the branch opening portion. Advancing and retreating means for moving the valve body forward and backward with respect to the inner surface of the vertical body,
A drive pinion fixed to the valve shaft, a driven gear meshed with an intermediate gear meshed with the drive pinion, and a rotating shaft biased in the rotation direction of the valve body to be pivotally supported by a closing portion of the vertical body portion; An elongate hole formed in the support plate of the valve body in a radial direction on a center line substantially bisecting the elongate hole, and an arm fixed to the rotary shaft so as to be engageable with the elongate hole. And a rotating means for rotating the valve body around a valve axis, which is constituted by a pin protruding from the valve body. With this feature, the sliding piece fitted to the eccentric cam absorbs the lateral movement of the valve element by the eccentric cam, and takes out only the advance and retreat movement of the valve element by the eccentric cam, and is protruded from the arm. When the partition plate closes one of the sleeve pipes or the branch pipe, the valve is closed because the pin which is engaged with the elongated hole of the support plate of the valve body can rotate the valve body. When the shaft is rotated, the advance / retreat means provided on the valve shaft moves the valve body inward, and separates the partition plate from the inner surface of the vertical trunk. Thereafter, the valve body is rotated by the rotating means, so that even when the inner surface of the vertical body portion is used as a valve seat, the distance that the valve body avoids interference with the cut portion of the fluid pipe can be reduced. For this reason, it is not necessary to increase the inner diameter of the vertical trunk portion or the size of the valve body, and it is possible to reduce the cost of the entire switching valve device.

It is preferable that the elongated hole is constituted by a linear portion for rotating the valve body in accordance with the movement of the pin, and a curved portion for absorbing the movement of the pin and not rotating the valve body.
With this configuration, when the valve shaft is rotated, it is possible to have a section in which the valve element is rotated and a section in which the valve element is not rotated, so that the valve element is not rotated when the valve element is moving forward and backward. Will be able to leave. Therefore, even if the distance between the packing and the cut portion of the fluid pipe is made as small as possible, it can be reliably avoided, so that the valve body can be made smaller and it becomes more economical.

A stopper for controlling the rotation of the valve body is provided. The stopper has a first stopper having a surface parallel to the pipe axis of the fluid pipe, and a surface parallel to the pipe axis of the branch port. And a second stopper. With this configuration, the valve body comes into contact with the stopper to stop the rotation of the valve body, so that the packing can be reliably avoided from being cut off, and the safety against water stoppage is improved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 2 denotes a fluid pipe, and a switching valve device 1 according to the present invention is mounted at a branch position where the pipe is circularly cut by a punch.

A vertical trunk portion 4 formed with an inner diameter larger than the outer diameter of the fluid pipe 2, a sleeve tube portion 5 connected to the vertical trunk portion 4, and a branch port portion directed sideways with respect to the sleeve tube portion 5. The split T-shaped pipe 3 constituted by the upper and lower parts has a vertically divided structure with a horizontal plane passing through the center of the fluid pipe 2 as a boundary, and flanges (not shown) provided at upper and lower opposed ends are connected to each other. They are integrally formed by being connected to each other.

The split T-tube 3 is attached to the fluid pipe 2 such that the center of the vertical body 4 and the center of the cut hole are coaxial, and a rubber ring 7 is attached to the socket 5 a of the sleeve pipe 5. By inserting and pressing with the split press wheel 8, water tightness with the fluid pipe 2 is maintained.

The upper end opening of the vertical trunk 4 is closed by a valve lid 9. A valve shaft 10 is provided on the central axis line in the vertical body 4.
However, the upper end thereof is rotatably supported by the valve lid 9 and the lower end thereof is rotatably supported by the bottom wall of the vertical body portion 4.

The upper and lower ends of the valve shaft 10 located inside the vertical body 4 are provided with eccentric cams 1 having the same shape and the same phase.
Reference numerals 1 and 11 are fitted and fixed.

A sliding piece 12b provided at the base of a pair of upper and lower support plates 12a having a fan shape in the valve body 12 is rotatably fitted to the two eccentric cams 11. In addition,
The eccentric direction of the eccentric cam 11 is such that the valve body 12 is
When the branch port 6 is closed, the eccentric cam 11 is directed to the pipe axis direction, and the eccentric amount of the eccentric cam 11 is slightly larger than the projected dimension of the cut end face of the fluid pipe 2 into the vertical barrel 4. There is as large.

The sliding piece 12b is provided so as to be slidable only in a direction perpendicular to the center line of the support plate 12a.

The peripheral edge of the support plate 12a has an arc-shaped cross section having substantially the same curvature as the inner diameter of the vertical body 4, and the cut end face of the fluid pipe 2 can be accommodated in the center of the outer peripheral face with a sufficient margin. Alternatively, a partition plate 12c having a circular concave portion 13 is integrally connected.

A packing 14 is embedded in the outer surface of the partition plate 12c around the recess 13 so as to be in close contact with the inner surface of the vertical trunk portion 4.

The partition plate 12c has a required area capable of closing an opening communicating with the branch port 6 and the fluid pipe 2 in the vertical body 4.

A drive pinion 15 is fitted on the upper part of the eccentric cam 11 on the upper side of the valve shaft 10, and this drive pinion 15 meshes with a large-diameter intermediate gear 16 rotatably mounted on the valve cover 9. The intermediate gear 16 is meshed with a driven gear 17 which is also rotatably pivoted on the valve cover 9. The support shaft 17a of the driven gear 17 is located on a line which is shifted from the center line which bisects the support plate 12a in the radial direction by approximately 45 ° toward the branch opening 6 side.

A pin 18 fixed downward to the end of an arm 17b provided on the driven gear 17 is bored in the upper support plate 12a in a radial direction on a center line substantially bisecting the pin. As shown in FIG. 2, the elongated hole 19 has a linear portion 19a having a width substantially equal to the diameter of the pin 18 on the peripheral edge side of the support plate 12a. A curved portion 19b is formed on the shaft side. When the valve element 12 closes the flow path of the fluid pipe 2, the pin 18 is in contact with or close to the valve shaft side end of the curved portion 19 b of the elongated hole 19. The drive pinion 15, the intermediate gear 16,
The driven body 17, the pin 18 and the elongated hole 19 allow the valve body 1
2 rotating means.

The valve cover 9 projects from the inside of the vertical body to the valve body 1.
The first stopper 20 having a surface parallel to the pipe axis of the fluid pipe 2 contacting the contact member 12d formed on the upper portion of the second support plate 12a, and the surface parallel to the pipe axis of the branch port 6 The formed second stopper 21 is provided.

Next, the operation of the above embodiment will be described with reference to FIGS.

FIG. 3 shows a state in which the valve element 12 closes the flow path of the left sleeve tube portion 5 and water flows from the right sleeve tube portion 5 to the branch port 6. In this state, The eccentric cam 11 is displaced to the left, and the valve body 12 is pressed through the packing 14 against the inner peripheral surface of the vertical trunk portion 4 of the split T-tube 3. The sliding piece 12b is located at the center of the valve body 12, the pin 18 is located at a position close to the end face of the curved portion 19b of the elongated hole 19 on the valve shaft side, and the contact member 12d contacts the first stopper 20. In contact.

When the valve shaft 10 is rotated clockwise in a plan view from this state, the sliding piece 12b starts to be displaced in the direction perpendicular to the pipe axis of the fluid pipe 2 by the rotation of the eccentric cam 11, as shown in FIG. When the eccentric cam 11 exceeds 90 ° and rotates to 135 °, the valve element 12 is separated from the inner surface of the vertical body 4 by the maximum dimension when the valve element 12 faces the sleeve tube 5.

At the time of rotation, the valve element 12 absorbs the movement of the valve element 12 in the direction perpendicular to the axis by the eccentric cam 11 due to the sliding piece 12b sliding in the direction perpendicular to the valve element axis.
Pin 1 sliding on curved portion 19b of long hole 19
8 and a contact member 12 in contact with the first stopper 20
It moves only in the pipe axis direction by d.

As described above, at the initial stage of rotation of the valve shaft 10, the valve body 12 is separated from the vertical body portion 4 while suppressing the rotation of the valve body 12, so that the valve body 12 protrudes into the vertical body portion 4. It is prevented from interfering with the cut portion of the slab.

As shown in FIG. 5, when the valve shaft 10 is further rotated, and the eccentric cam 11 is rotated to approximately 225 °, the eccentric cam 11 is displaced in a direction directly opposite to the partition plate 12c, and the valve body 12 and the vertical body portion are displaced. 4 is the largest. The pin 18 moves to the outer end of the linear portion 19a of the elongated hole 19.

When the eccentric cam 11 further rotates by approximately 90 ° from this state, as shown in FIG. 6, the valve body 12 moves until the center portion thereof is substantially aligned with the center of the pipe axis of the branch port portion 6. The contact member 12d of the valve body 12 is
Abut. The pin 18 is located at the boundary between the straight portion 19a and the curved portion 19b of the long hole 19.

The valve shaft 10 and the eccentric cam 11 are approximately 450
゜ When rotated, as shown in FIG. 7, the valve body 12 gradually approaches the inner surface of the vertical trunk portion 4 by the action of the eccentric cam 11,
Since the amount of eccentricity of the eccentric cam 11 in the direction of the branch opening 6 is maximized, the valve body 12 is pressed toward the branch opening 6, and the packing 14 is pressed against the inner surface of the vertical trunk portion 4 so that the branch opening is formed. The flow path on the part 6 side is closed. As a result, the flow path of the water is switched to the fluid pipe 2 side. The valve element 12 is moved by the interaction between the sliding piece 12b, the second stopper 21, and the curved portion 19b.
It can move linearly in the direction of the branch opening.

When the valve body 12 is rotated to the left sleeve tube portion 5 side again, the valve shaft 10 may be rotated counterclockwise in plan view. It can be rotated to the original position shown in FIG.

As described above, in the switching valve device of the above embodiment, at the initial stage of the rotation of the valve shaft 10, the valve body 12 does not rotate and retreats away from the inner peripheral surface of the vertical body portion 4. ,
Since the valve body 12 rotates after a predetermined distance inward from the openings of the sleeve tube section 5 and the branch port section 6, the valve body 12 rotates even if the cut portion of the fluid pipe 2 projects into the vertical body section 4. Can rotate without hindrance.

Accordingly, since the valve element is retracted without rotating, the distance from the inner peripheral surface of the vertical trunk portion 4 can be reduced as compared with the conventional switching valve device. Since it is not necessary to increase the size or the size of the valve body, the cost can be reduced and the weight of the entire apparatus can be reduced.

The present invention is not limited to the above embodiment.

For example, the drive pinion 15 and the intermediate gear 1
6. Rotating means such as the driven gear 17 may be provided below the vertical body, and the pin 18 may be engaged with the upper and lower support plates 12a to rotate the valve body 12.

In the embodiment, the curved portion 19b of the elongated hole 19 has a large gap between the curved portion where the pin 18 contacts when closing the sleeve tube portion 5 and the curved portion where the pin contacts when closing the branch opening 6. However, it may be formed in a forked groove. Further, although the elongated hole 19 is a groove formed in the support plate 12 a, a protruding ridge with which the pin 18 contacts the support plate 12 may be formed continuously.

[0045]

According to the present invention, the sliding piece fitted to the eccentric cam absorbs the lateral movement of the valve by the eccentric cam, and the sliding piece absorbs only the advance and retreat of the valve by the eccentric cam. Since the pin protruding from the arm is engaged with the long hole of the support plate of the valve body and the valve body can be rotated, the partition plate faces one of the sleeve pipes or the branch pipe and holds them. When the valve shaft is rotated while it is closed, the advancing and retreating means provided on the valve shaft moves the valve body inward, and separates the partition plate from the inner surface of the vertical body. Thereafter, the valve body is rotated by the rotating means, so that even when the inner surface of the vertical body portion is used as a valve seat, the distance that the valve body avoids interference with the cut portion of the fluid pipe can be reduced. For this reason, it is not necessary to increase the inner diameter of the vertical trunk portion or the size of the valve body, and it is possible to reduce the cost of the entire switching valve device.

According to the second aspect of the present invention, when the valve shaft is rotated, it is possible to have a section where the valve element is rotated and a section where the valve element is not rotated, so that the valve element moves forward and backward. Sometimes the valve can be kept unrotated. Therefore, even if the distance between the packing and the cut portion of the fluid pipe is made as small as possible, it can be reliably avoided, so that the valve body can be made small and economical.

According to the third aspect of the present invention, since the valve element can stop the rotation of the valve element by contacting the stopper, the packing can be reliably avoided at the cut portion, and the safety against water stoppage is enhanced. .

[0048]

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional front view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view taken along the line II.

FIG. 3 is a schematic plan view of the present invention, and is an explanatory view showing a state in which a valve body closes a sleeve tube portion, and (a) shows a valve body;
(B) shows an eccentric cam and a sliding piece.

FIG. 4 is an explanatory view when the valve shaft is rotated by 135 °.

FIG. 5 is an explanatory view when the valve shaft is rotated by 225 °.

FIG. 6 is an explanatory view when the valve shaft is rotated by 315 °.

FIG. 7 is an explanatory view when the valve shaft is rotated by 450 °.

FIG. 8 is a central longitudinal sectional front view showing a conventional example.

FIG. 9 is a cross-sectional plan view taken along the line II-II.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switching valve device 2 Fluid pipe 3 Split T-tube 4 Vertical trunk 5 Sleeve pipe 5a Reception port 6 Branch port 7 Rubber ring 8 Split push ring 9 Valve lid 10 Valve shaft 11 Eccentric cam 12 Valve body 12a Support plate 12b Sliding piece 12c Partition plate 12d Contact member 13 Recess 14 Packing 15 Drive pinion 16 Intermediate gear 17 Follower gear 17a Support shaft 17b Arm 18 Pin 19 Long hole 19a Linear portion 19b Curved portion 20 First stopper 21 Second stopper

Continuation of the front page F term (reference) 3H053 AA02 AA25 AA32 BC14 BD02 BD10 CA06 DA02 3H063 AA05 BB22 BB32 BB43 DB14 EE08 EE11 FF09 GG06 3H067 AA16 CC32 DD03 DD12 DD22 DD44 DD45

Claims (3)

[Claims] 1. A switching valve device in which a split T-shaped pipe is mounted at a branch position of a fluid pipe, a fluid pipe is cut at a branch position, and a valve body is inserted to switch a fluid flow path. The split T-shaped pipe has a pair of sleeve pipes connected to the vertical body and a branch opening facing sideways, and the valve body has a vertical portion at a cutting portion of the fluid pipe on an outer surface. A partition plate formed with a concave portion capable of accommodating a protruding end into the body, a pair of upper and lower members having a sector shape in plan view and having a base end rotatably supported by a valve shaft supported by a split T-tube. And provided at a support portion of the valve body in the valve shaft, and formed integrally with the valve shaft and provided on the valve body so as to be movable only in a direction perpendicular to the direction in which the valve body advances and retreats. By the eccentric cam fitted with the sliding piece, at least the partition plate faces one of the sleeve tubes or the branch port. When the valve body is oriented, the valve body is moved forward and backward with respect to the inner surface of the vertical body portion, a drive pinion fixed to the valve shaft, an intermediate gear meshed with the drive pinion, and a rotating shaft. And a driven gear that is deflected in the direction of rotation of the valve body and pivotally supported by the closing portion of the vertical body portion, and a support plate of the valve body is bored radially on a center line that substantially bisects the driven gear. Turning means for rotating the valve body constituted by a long hole and a pin protruding from an arm fixed to the turning shaft so as to be able to engage with the long hole, around the valve axis, A switching valve device comprising: 2. The device according to claim 1, wherein the elongated hole comprises a straight portion for rotating the valve body in accordance with the movement of the pin, and a curved portion for absorbing the movement of the pin and not rotating the valve body. Switching valve device. 3. A stopper for controlling rotation of the valve body is provided. The stopper includes a first stopper having a surface parallel to the pipe axis of the fluid pipe, and a surface parallel to the pipe axis of the branch port. The switching valve device according to claim 1, comprising a second stopper formed.