JP2001027349A - Gate valve device and valve box device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate valve device and valve box device capable of easily meeting a shallow burying depth. SOLUTION: These devices are provided with a T-shaped pipe having a main pipe part 11 in which a fluid flows and which is not divided in a circumferential direction and a branch pipe part 12 forkedly projecting upward of the main pipe part 11, an opening/closing valve 18 provided in the branch pipe part 12 for opening and closing the branch pipe part 12, a valve cover 3 joined to the upper end of the branched pipe part 12, and a gate valve element 4 which is housed in the valve cover 3 and closer to the valve cover 3 side from the opening/closing valve 18 in the branch pipe part 12 and blocks a fluid flowing in the main pipe part 11 across the inside of the main pipe part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate valve device and a valve box device for closing a water pipe, a gas pipe, and the like.

[0002]

2. Description of the Related Art Conventionally, a pipe valve such as a water pipe is provided with a gate valve device in advance. Such a gate valve device is provided with a valve chamber and a gate valve body, and the staff shuts off the flow of fluid as needed. By the way, water pipes were generally buried at a depth of about 1.2 m (earth covering). Therefore, it is necessary to dig a hole for burying the water pipe deeply in the construction, and the burial cost is increased. So, in the future,
The burial depth is expected to be as shallow as 0.6m.

[0003]

However, when the burial depth is reduced, if the valve lid of the gate valve is provided above the water pipe,
Since the height of the gate valve device is increased, it is difficult to cope with a shallow burial depth.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a gate valve device and a valve box device which can easily cope with a small burial depth.

[0005]

The construction of the gate valve device of the first invention for achieving the above object will be described with reference to FIG. As shown in FIG. 2, the gate valve device includes a main pipe portion 11 that is not divided in the circumferential direction while a fluid flows, and a branch pipe portion 1 that protrudes from the main pipe portion 11 so as to branch upward.
2, a T-shaped pipe 10 having an opening and closing valve 18, an on-off valve 18 provided in the branch pipe section 12 to open and close the branch pipe section 12, a valve lid 3 joined to an upper end of the branch pipe section 12, and the valve lid 3 and the valve cover 3 more than the on-off valve 18 in the branch pipe section 12.
A gate valve body 4 is provided on the side and closes the fluid flowing through the main pipe 11 across the main pipe 11.

Next, how to use the gate valve device will be briefly described with reference to FIGS. As shown in FIG. 1, a valve box device 1 without a partition valve body and its valve lid is connected to a straight pipe or the like and buried underground. When it becomes necessary to stop the water, the valve lid 3 containing the gate valve body 4 is joined to the valve box device 1 as shown in FIG. After the joining, the on-off valve 18 is opened, the gate valve body 4 is lowered, and as shown in FIG. 3, the gate valve body 4 is pressed against the inner surface of the main pipe portion 11 to cut off the flow of fluid.

[0007] Incidentally, since all the cutoff points of the pipeline are not simultaneously blocked, a small number of valve covers and gate valves may be purchased for one pipe diameter size. For this reason, as a product, only the valve box device is sold in large quantities, so that the rights of the valve box device alone need to be protected. That is, the valve box device according to the second aspect of the present invention has a T-type having a main pipe portion through which fluid flows and which is not divided in the circumferential direction, and a branch pipe portion projecting upward from the main pipe portion. A pipe, and an on-off valve provided in the branch pipe part for opening and closing the branch pipe part, and when a gate valve body is inserted from an open end of the branch pipe part, the gate valve body moves inside the branch pipe part. The branch pipe portion is formed so that it can move downward and press against the inner surface of the main pipe portion.

In the present invention, the term "split T-shaped pipe for stopper" or "T-shaped pipe for drilling" is clearly defined as "the fluid flows and is not divided in the circumferential direction". This is to distinguish them. “Fluid” refers to a liquid such as water or a gas such as a gas.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.
Has a T-tube 10. The T-shaped pipe 10 includes a main pipe section 11 through which a fluid flows and which is not divided in the circumferential direction, and a branch pipe section 12 protruding from the main pipe section 11 so as to branch upward. The branch pipe section 12 is formed with a valve box section 13 that houses an on-off valve 18 (FIG. 2) described later.
The branch pipe section 12 including the valve box section 13 and the main pipe section 11 are integrally formed.

At the open end (upper end) of the branch pipe section 12,
A flange 15 is provided. A stopper 16 is attached to the flange 15, and the opening end of the branch pipe section 12 is closed by the stopper 16. The main pipe 11
For example, straight pipes 2, 2 and the like are joined to each other via a flange, and a flow path 17 (FIG. 2) is formed.

FIG. 2 shows a state in which a valve cover 3 is joined to the upper end of the valve box device 1 when the flow of fluid is shut off. In order to shut off the flow of the fluid, as shown in FIG. 2, a valve cover 3 is provided at the upper end of the branch pipe portion 12 of the valve box device 1 via a flange 15 instead of the plug 16 (FIG. 1). Are joined. In the branch pipe section 12, an on-off valve 18 that closes between the open end side 12a and the base end side 12b (on the main pipe section 11 side) of the branch pipe section 12, and a storage space when the on-off valve 18 is closed 18S is provided. The on-off valve 18 is connected to the branch pipe 12
In the pipe diameter direction X. The on-off valve 18 closes between the open end 12a and the proximal end 12b when the valve is closed.

As shown in FIG. 1, a bypass pipe 14 is provided in the branch pipe section 12. The bypass pipe 14 connects two spaces (a space on the opening end side 12a and a space on the base end side 12b) partitioned by the on-off valve 18 (FIG. 2). A bypass valve 14V for opening and closing is provided.

A gate valve body 4 is accommodated in the valve cover 3 shown in FIG. The gate valve body 4 has, for example, a rubber seal portion 43, and is provided with an on-off valve 18 in the branch pipe portion 12.
And is housed in the valve lid 3. The gate valve body 4 is provided so as to be able to move up and down in the orthogonal direction Y of the flow path 17 by rotating the spindle 41 in the forward and reverse directions. Therefore, the gate valve body 4 moves downward across the inside of the main pipe portion 11, and the seal portion 43 presses against the inner surface of the main pipe portion 11 to block the fluid flowing through the main pipe portion 11 (the valve closing position). (Position) P1 and a valve opening position P2. The spindle 41 has a well-known frame 42
Is screwed.

FIG. 3 shows a cross section of the gate valve device when shut off. As shown in FIG. 3, the gate valve body 4 is pressed against the inner surface of the main pipe portion 11 when shut off. The inner width W of the branch pipe portion 12 in which the gate valve body 4 moves is set to a value equal to or larger than the inner diameter D of the main pipe portion 11 indicated by a broken line.

Next, how to use the gate valve device will be described. First, as shown in FIG. 1, the main pipe portion 11 of the valve box device 1 is joined to and embedded in the straight pipes 2 and 2 via a flange, and then a fluid flows. The on-off valve 18 (FIG. 2) in the valve box 13 is set in an open state in advance.

Next, when it becomes necessary to shut off the pipe, the on-off valve 18 is moved in the closing direction to close the valve, and the space between the open end 12a and the proximal end 12b is closed. Remove. Thereafter, as shown in FIG. 2, the valve lid 3 is joined to the upper end of the branch pipe section 12 via the flange 15. After the joining, the bypass valve 14V (FIG. 1) is opened, and the bypass pipe 1 is opened.
4 (FIG. 1), the fluid pressure (water pressure) on the open end 12a and the fluid pressure on the proximal end 12b are made equal.

Thereafter, the on-off valve 18 is opened. After the valve is opened, the spindle 41 is rotated to lower the gate valve body 4 from the valve opening position P2 to the valve closing position P1, and as shown in FIG.
The gate valve body 4 is brought into pressure contact with the inner surface of the main pipe section 11 to form the main pipe section 1.
1 to shut off the flow of fluid.

In the above construction, the present device normally has only the T-tube 10 of FIG. 1 buried therein, and the valve cover 3 is joined only when it is necessary to cut off the pipeline. Easy to respond to. Also, if necessary, the valve cover device 3
Are joined so as to cut off the pipe, so that there is no need to provide the gate valve body 4 at each cut-off point of the pipe line, and one or several sets of the valve lid 3 and the gate valve body for one pipe diameter size. 4 can be prepared, so that the cost can be reduced.

Further, since the valve cover 3 containing the gate valve body 4 can be separated from the valve box device 1 and stored in a predetermined storage location, the gate valve including the rubber seal portion 43 can be used. The temporal deterioration of the body 4 can be prevented. Therefore, the water stopping performance is also improved.

As shown in FIGS. 4 and 5, the on-off valve 18 which rotates about a rotating shaft 19A is used as the on-off valve 18.
A may be provided. The opening / closing valve 18A rotates in the direction of the arrow from the valve opening position P1 to the valve closing position P2 indicated by the two-dot chain line around the rotation shaft 19A, and closes the gap between the opening end side 12a and the base end side 12b. As shown in FIG. 5, the planar cross-sectional shape of the branch pipe section 12 is formed to be substantially square.

As shown in FIGS. 6 and 7, an on-off valve 18B that rotates about a rotating shaft 19B may be provided as an on-off valve. The opening / closing valve 18B rotates in the arrow direction from the valve opening position P1 to the valve closing position P2 indicated by a two-dot chain line around the rotation shaft 19B, and closes the gap between the opening end side 12a and the base end side 12b.

In the above embodiment, the valve box device 1
And the straight pipes 2 and 2 are joined via the flanges, but it is also possible to join the A-shaped or K-shaped packing and the press ring using a flexible joint.

[0023]

As described above, according to the present invention,
Since the valve lid is joined only when it is necessary to shut off the flow path, it is easy to cope with a shallow burial depth. Further, since a valve lid is joined to the valve box device as required to block the pipeline, there is no need to provide a gate valve at each location where the pipeline is blocked.
It is only necessary to prepare one or several sets of valve lids and gate valves for one pipe diameter size, so that the cost can be reduced. Further, since the valve lid accommodating the gate valve body can be separated from the valve box device and stored in a predetermined storage location, the gate valve body can be prevented from being deteriorated with time.
Therefore, the water stopping performance is also improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a valve box device according to an embodiment of the present invention.

FIG. 2 is a partially sectional side view showing a state in which a valve lid is joined to a valve box device, that is, a gate valve device.

FIG. 3 is a longitudinal sectional view of the gate valve device.

FIG. 4 is a sectional view showing a modification of the on-off valve.

FIG. 5 is a plan sectional view showing the modification.

FIG. 6 is a sectional view showing another modification of the on-off valve.

FIG. 7 is a plan sectional view showing the modification.

[Explanation of symbols]

 1: Valve box device 10: T-shaped pipe 12: Branch pipe section 12a: Open end side 12b: Base end side 14: Bypass piping 14V: Bypass valve 15: Flange 16: Plug 18: On-off valve 18S: Housing space 3: Valve Lid 4: Gate valve R: Inner diameter W: Inner width

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H051 AA03 BB03 BB04 BB10 CC06 CC11 CC12 CC14 CC15 FF01 FF02 3H052 AA01 BA25 BA26 BA35 CC01 EA01 EA02 EA16 3H053 AA03 AA25 AA26 BC01 DA01 DA02 DA12

Claims (8)

[Claims] 1. A T-shaped pipe comprising: a main pipe part through which a fluid flows and which is not divided in a circumferential direction; and a branch pipe part protruding from the main pipe part so as to branch upward. An on-off valve provided to open and close the branch pipe portion; a valve lid joined to an upper end of the branch pipe portion; and the bookcase accommodated on the valve lid side of the valve lid and the on-off valve in the branch pipe portion. A gate valve device comprising a gate valve body for closing a fluid flowing through the main pipe part across the pipe part. 2. A T-shaped pipe comprising: a main pipe part through which fluid flows and which is not divided in the circumferential direction; and a branch pipe part protruding from the main pipe part so as to branch upward, and the branch pipe. An opening / closing valve provided in the section to open and close the branch pipe section. When a gate valve body is inserted from an open end of the branch pipe section, the gate valve body moves downward in the branch pipe section to move the book. A valve box device in which the branch pipe portion is formed so as to be able to press against the inner surface of the pipe portion. 3. The valve box device according to claim 2, wherein an inner width of the branch pipe portion in which the gate valve moves is set to be equal to or larger than an inner diameter of the main pipe portion. 4. The valve box device according to claim 2, wherein a planar cross-sectional shape of the branch pipe portion through which the gate valve body moves is formed in a substantially rectangular shape. 5. The valve box device according to claim 2, wherein the branch pipe portion has at least a space for accommodating the on-off valve when the valve is closed. 6. The valve box according to claim 2, wherein a valve box section of the on-off valve is formed in the branch pipe section, and the branch pipe section including the valve box section is integrally formed with the main pipe section. apparatus. 7. The bypass pipe according to claim 2, wherein the branch pipe is provided with a bypass pipe connecting two spaces partitioned by the on-off valve, and the bypass pipe is provided with a bypass valve for opening and closing the bypass pipe. Valve box equipment. 8. The valve box device according to claim 2, wherein a flange is provided at an open end of the branch pipe portion, and a plug is attached to the flange to close an open end of the branch pipe portion.