JPH10292889A - Two-stage insertion device of valve element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform a thrusting work of a valve element by providing a second thrusting means pressing a first thrusting means by moving in the axial direction to the upper side which is coaxial with the first thrusting means moving the valve element forward and backward in the axial direction. SOLUTION: A thrusting screw 22 of a second thrusting means 19 is moved downward by being revolved by an operation handle 23 and the upper end of the angular shaft part 14a of a screw rod 14 is pressed by a holding cylinder 25 at the lower end of the thrusting screw 22. Thus, the whole of first thrusting means 11 such as a guide cylinder 12 and a valve stem 13 is moved downward. When a screw cap 15 is abutted on the upper end of a supporting case 10, a thrusting work by the second thrusting means 19 is finished and the lower end of a valve element 18 for check is located just above a through hole 2 of a fluid pipe 1 at this point of time. When the angular shaft part 14a of the screw rod 14 is revolved by a rotational tool, etc., after the second thrusting means 19 and a rachet wrench 27 are removed, the valve stem 13 is moved downward and the valve element 18 for check which is mounted on the lower end enters into the fluid pipe 1 from the through hole 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-stage insertion device for pushing a valve element mounted on, for example, a split T-shaped pipe for watertight construction into a pipe through a through hole of a fluid pipe. .

[0002]

2. Description of the Related Art Generally, a split T-shaped pipe used for watertight construction is provided with a gate valve for temporarily stopping the outflow of fluid from a fluid pipe when a drilling machine, a branch pipe, or the like is attached or detached. A water control valve body that can move forward and backward into the fluid pipe is attached.

A split T-shaped pipe having such a gate valve has a long rod or the like necessary for moving the water control valve body from above the gate valve to the bottom of the fluid pipe. The length of the valve box is considerably longer.

[0004] Therefore, when the fluid pipe is buried at a position relatively shallower than the ground surface, there occurs a problem that the valve box projects from the ground surface.

In order to solve such a problem, the present applicant has already proposed a split T-tube as disclosed in Japanese Utility Model Publication No. 63-33737.

In this device, a valve box (valve lid) is connected to an outer cylinder portion,
It has a double structure with an inner cylinder part slidably fitted to this, and the water control valve element can move forward and backward by turning a feed rod passing through the upper lid of the upper end of the inner cylinder part.

[0007]

In the above-mentioned prior art, a plurality of bolts attached to the outer peripheral portion of the upper lid at the upper end of the inner cylindrical portion and the flange of the outer cylindrical portion are provided in the means for pushing the inner cylindrical portion into the outer cylindrical portion. And the use of the nut, the pushing work of the water control valve was troublesome.

Further, in order to insert the inner cylinder portion into the outer cylinder portion with their axes aligned, a plurality of screws must be tightened little by little evenly, and the operation is complicated and requires skill.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there is provided a two-stage valve element insertion device in which the pushing operation of the valve element can be performed extremely easily on the center axis of the valve element. It is intended to provide.

[0010]

In order to achieve the above object, an insertion device according to the present invention provides a guide coaxial with the through-hole on an outer peripheral surface of a fluid pipe having a through-hole formed in an upper portion of a pipe wall. A valve element insertion device which is provided with a split T-shaped pipe having a pipe and a gate valve provided at an appropriate position thereof, and pushes a valve element housed in the guide pipe into the fluid pipe through the through hole. At the upper end of the guide tube, a first pushing means for moving the valve body in the axial direction by screw feed is provided so as to be slidable up and down, and an upper part coaxial with the first pushing means, A second pushing means for pushing the first pushing means by being supported by a part of the split T-tube and moving in the axial direction is provided. According to the two-stage insertion device of the present invention, first, by operating the second pushing means, the entire first pushing means is pushed into the guide tube, and then the first pushing means on the same axis can be operated to feed the valve body by screw. For this reason, even if the advance / retreat distance is long, it is possible to accurately and easily press the valve body in two stages.

The first pushing means is a guide tube fitted to the guide tube so as to be slidable up and down, and a tube fitted to the guide tube so as to be vertically movable and having a valve body attached to the lower end. It is preferable to include a valve stem in the shape of a screw, and a threaded rod screwed into the valve stem and having a rotating operation part at an upper end protruding part. By doing so, the valve element can be stably and reliably moved forward and backward.

It is preferable that a cap for restricting the vertical movement of the guide tube and the upper end of the guide tube is fitted to the upper end of the guide tube and the screw rod so that the turning operation part of the screw rod projects upward. By doing so, the first pushing means is stably fixed to the guide tube, and thereafter the first pushing means is operated. Therefore, danger such as jumping out of the guide rod or valve stem due to water pressure or the like is avoided. .

The second pushing means includes a bracket detachably attached to the guide tube, and a pushing screw which is screwed vertically to an upper end thereof and has an operation handle at the upper end. Is preferred. With this configuration, the first pressing means can be easily pressed while supporting the pressing reaction force by the bracket.

It is preferable to provide a bearing at the lower end of the pushing screw to allow relative rotation with the screw rod. This prevents the screw rod from rotating when the first pushing means is pressed, so that there is no possibility that the valve body will be displaced vertically.

[0015]

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

1 and 2 show a side view and a vertical sectional front view, respectively, of the present invention. Reference numeral 1 denotes a fluid pipe such as a water pipe.
The upper surface is provided with a through hole 2.

On the outer peripheral surface of the fluid pipe 1 surrounding the through hole 2, a split T-shaped pipe 3 composed of a pair of upper and lower saddles is provided.
It is mounted while maintaining watertightness by a packing 4 interposed in the opening of (1).

Connection tube 3 facing upward from the upper part of split T-tube 3
The lower end of the guide pipe 5 of the water control valve element 18 described later is screwed concentrically with the through hole 2 via the packing 6 at a. In the opening 5a formed in the left side wall of the guide tube 5,
A gate valve device 7 is mounted orthogonal to the guide tube 5.

The gate valve device 7 includes a threaded rod 8 and a valve body 9 screwed to and screwed into the threaded rod 8. The valve body 9 is inserted into the guide pipe 5 in a waterless construction, and a fluid pipe is provided. Used to temporarily shut off more than one fluid.

At the upper end of the cylindrical support case 10 bolted to the flange 5b at the upper end of the guide tube 5, a first pushing means 11 of a water control valve 18 described later is coaxial with the through hole 2. Installed for some reason.

The first pushing means 11 is a guide cylinder 12 fitted to the upper end of the support case 10 so as to be slidable up and down.
And a cylindrical valve rod 13 fitted therein so as to be slidable up and down and relatively unrotatable, and a screw rod 14 screwed into an internal thread on the inner surface of the valve rod 13. The upper end is rotatably held by the guide tube 12.

The upper ends of the guide cylinder 12 and the screw rod 14 are
The square shaft portion 14a at the upper end of the screw rod 14 is covered by the screw cap 15, and projects upward through the screw cap 15. The screw cap 15 has a female screw 15 a on the lower inner surface and a male screw 1 on the upper end of the support case 10.
By screwing to the support case 0a, the support case 10 can be screwed.

At the lower end of the valve stem 13 located in the support case 10, a water control valve element 18 comprising a mandrel 16 and a cylindrical sealing member 17 made of elastic rubber or the like is attached. The outer diameter of the valve element 18 has an outer diameter that can be inserted into the through hole 2 of the fluid pipe 1.

A second pushing means 19 is attached to each of the flanges 5b, 10b of the guide tube 5 and the support case 10. The second pushing means 19 has an upper end formed with the screw rod 14.
, A forked bracket 21 having a lower end detachably attached to the flange 5b and fixed with bolts 20.
And a push screw 22 which is screwed coaxially with the screw rod 14 in the upper horizontal portion, and an operation handle 23 is fitted in the lower horizontal portion of the push screw 22 at the upper horizontal portion. The holding shaft 24 includes the square shaft portion 14 of the screw rod 14.
The pressing plate 25 which can contact the upper end surface of the
A thrust bearing 26 interposed between the lower end of the push screw 22 and the thrust bearing 26 allows the push screw 22 to rotate relatively.

A ratchet wrench 27 is mounted on the screw cap 15 before the second pushing means 19 is mounted.

Next, the procedure for pushing the water control valve element 18 will be described.

First, the support case 10 and the first pushing means 11 attached thereto are mounted on the flange 5b of the guide tube 5,
After the guide cylinder 12 and the water control valve element 18 are mounted in a state of being pulled up to the upper limit, the second pushing means 19 is attached to the guide tube 5 and the flanges 5b, 10b of the support case 10.

When this operation is performed by the waterless construction method, as shown in FIG. 2, the valve element 9 of the partitioning device 7 is screwed in as indicated by an imaginary line to move the fluid from the fluid pipe 1 to the fluid guide pipe 5 side. This is done to prevent outflow.

Next, the pushing screw 22 of the second pushing means 19 is rotated downward by the operation handle 23 to move it downward, as shown in FIG. Thereby, the upper end of the square shaft portion 14a of the screw rod 14 is pressed.

As a result, the entire first pushing means 11 such as the guide cylinder 12 and the valve rod 13 is pushed downward. At this time, since the pressing plate 25 is allowed to rotate relative to the pushing screw 22 by the thrust bearing 26, transmission of the rotational force of the pushing screw 22 to the screw rod 14 is prevented.

When the screw cap 15 comes into contact with the upper end of the support case 10, the pushing operation by the second pushing means 19 is completed. At this point, the lower end of the water control valve 18 passes through the fluid pipe 1. It is located directly above the hole 2.

Then, the screw cap 15 is screwed to the male screw 10a of the support case 10 by the ratchet wrench 27, and the upper end of the first pushing means 11 is held by the support case 10. (See FIG. 3) Here, instead of the screw cap 15, it is also possible to restrict the upward movement of the cap using a known means such as a bayonet joint or pin fixing. Next, as shown in FIG. 4, after removing the second pushing means 19 and the ratchet wrench 27, the screw rod 1 is removed.
4 is rotated by a rotary tool or the like, the valve rod 13 is moved downward by screw feed, and the water control valve element 18 attached to the lower end thereof is moved through the through hole 2 through the fluid pipe 1.
Is inserted into.

When the screw rod 14 is further rotated after the lower surface of the water control valve element 18 contacts the inner bottom surface of the fluid pipe 1, the seal member 17 is elastically deformed in the radially expanding direction. Thereby, the flow of the fluid in the fluid pipe 1 is interrupted. Thereafter, the gate valve device 7 is removed as necessary, and the opening 5a is closed by the blind lid.

As described above, according to the two-stage insertion device of the present invention, the second pushing means 19 is provided on the central axis of the water control valve element 18, so that the pushing screw 22 is simply rotated. Thus, the first-stage pressing operation of the water control valve element 18 can be performed extremely easily.

Further, the thrust bearing 26 provided at the lower end of the pushing screw 22 allows the screw rod 14 to be pushed in without being rotated, so that the position of the water control valve element 18 can be changed during the first stage pushing operation. The inconvenience of shifting up and down is eliminated.

When the pushing screw 22 is rotated, the pushing reaction force due to the fluid pressure applied to the water control valve body 18 is supported by the bifurcated bracket 21, so that the valve body 18 can be pushed in stably. it can.

Since the second pushing means 19 is detachable from the guide tube 5 and the supporting case 10, it can be detached after the first pushing-in operation, so that the second pushing means 19 can be put on the ground even if the buried ground is shallow. It does not protrude.

According to the present invention, in addition to the water control valve element 18 pushed in from above the fluid pipe 1 as described above, a split T-shaped The present invention can also be applied to a type in which the pipe 3 is attached to the side and the valve element 18 is pushed in from the side.

The present invention can of course be applied to fluid pipes other than water pipes.

[0040]

According to the present invention, the following effects can be obtained.

(A) According to the first aspect of the present invention, by operating the second pushing means, the entire first pushing means is pushed into the guide tube, and then the first pushing means on the same axis is operated to set the valve body. Since the screw can be fed, even if the advance / retreat distance is long, the pushing operation of the valve element can be performed accurately and easily in two steps.

(B) According to the second aspect of the invention, the valve body can be stably and reliably moved forward and backward.

(C) According to the third aspect of the present invention, the first pushing means is stably fixed to the guide tube, and thereafter the first pushing means is operated. Danger such as jumping out is avoided.

(D) According to the fourth aspect of the present invention, the first pressing means can be easily pressed while supporting the pressing reaction force by the bracket.

(E) According to the fifth aspect of the invention, when the first pushing means is pressed, the screw rod is prevented from rotating, so that there is no possibility that the valve body will be displaced in the vertical direction.

[0046]

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing one embodiment of the present invention.

FIG. 2 is a vertical sectional front view taken along line II-II of FIG.

FIG. 3 is a longitudinal sectional front view showing a state in which a first pressing means is pressed by a second pressing means.

FIG. 4 is a longitudinal sectional front view showing a state in which a second pushing means is removed, and the valve body is pushed into the fluid pipe by the first pushing means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Through-hole 30 Split T-tube 3a Connecting cylinder part 4 Packing 5 Guide pipe 5a Opening 5b Flange 6 Packing 7 Gate valve device 8 Screw rod 9 Valve body 10 Support case 10a Male screw 10b Flange 11 First push Means 12 Guide cylinder 13 Valve rod 14 Screw rod 14a Square shaft part 15 Screw cap 15a Female thread 16 Mandrel 17 Seal member 18 Water control valve element 19 Second pushing means 20 Bolt 21 Bracket 22 Push screw 23 Operation handle 24 Holding tube 25 Press plate 26 Thrust bearing 27 Ratchet wrench

Claims (5)

[Claims] 1. A split T-shaped pipe having a guide tube coaxial with the through hole and a gate valve provided at an appropriate position is mounted on an outer peripheral surface of the fluid pipe having a through hole formed in an upper part of the pipe wall. A valve element inserted into the fluid pipe through the through-hole into the fluid pipe via the through-hole, wherein the valve element is screwed to the upper end of the guide pipe in the axial direction. A first pushing means for moving forward and backward is provided so as to be slidable up and down, and is moved in the axial direction by being supported by a part of a split T-shaped tube, in an upward direction coaxial with the first pushing means, A two-stage insertion device for a valve body, comprising a second pushing means for pushing the first pushing means. 2. A first push-in means is fitted in a guide tube so as to be slidable up and down, and a first push-in means is fitted in the guide tube so as to be vertically movable, and a water control valve element is provided at a lower end thereof. 2. The two-stage insertion of a valve body according to claim 1, comprising a cylindrical valve stem attached thereto, and a threaded rod screwed into the valve stem and having a rotating operation portion at an upper end protruding portion. apparatus. 3. A cap for restricting vertical movement of the guide tube and an upper end of the guide tube is fitted to an upper end of the guide tube and the screw rod such that a rotation operation portion of the screw rod projects upward. A two-stage insertion device for a valve element according to claim 1. 4. The second pushing means comprises a bracket detachably attached to the guide tube, and a pushing screw which is screwed vertically to an upper end thereof and has an operation handle at an upper end thereof. The two-stage valve device insertion device according to any one of claims 1 to 3, wherein: 5. The two-stage valve element insertion device according to claim 4, wherein a bearing is provided at a lower end of the pushing screw to allow relative rotation with the screw rod.