JPH0571684A - Apparatus for replacing existing valve - Google Patents

Abstract

PURPOSE:To provide an apparatus capable of replacing an existing valve connected to a water supply pipe line buried in the ground for example without shutting off water supply in the pipe line. CONSTITUTION:A pair of upper and lower cover bodies 5, 6 removably attached to each other to sandwich from above and below and cover in the water-tight manner a water supply pipe line including an existing valve 2 and extending near the same, a hanger 35 and hanging rod 36 extending through the upper wall of the upper cover body 5 in the water-proof-manner and provided to vertically move in the upper cover body to hang up a replacement valve to a height in which an existing valve removed can be replaced by the replacement valve, the replacement valve 25 received in the lower cover body 6 to be shifted to the position of the removed existing valve and a drive member 27 for shifting the replacement valve are provided. An expansible pipe joint and a operating cylinder for expanding and contracting the pipe joint are provided in the replacement valve 25. The lower cover body 6 is provided with a drain valve 57.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus which can replace an existing valve connected to a underground water supply pipeline, for example, without disconnecting the pipeline.

[0002]

2. Description of the Related Art When an existing valve connected to a water supply line as described above fails or is aged, it is necessary to replace it with a new valve. Conventionally, in such a case, the water supply line must be replaced. Water is cut off and replacement work is being performed.

[0003]

Accordingly, in addition to the inconvenience to consumers caused by stopping the water supply, when the water supply is restarted after replacement, rust accumulated in the stagnation in the pipeline flows out, which causes red water. However, there is a problem that a white turbidity phenomenon occurs in which water becomes white turbid due to the generation of air and the suction of air into the pipeline.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a device capable of replacing an existing valve without cutting the water supply line.

[0005]

In order to achieve the above-mentioned object, the present invention is a pair of detachably provided water-feeding pipe lines near the valve, including an existing valve, sandwiched vertically from above to cover in a watertight manner. The upper and lower cover bodies and the upper wall of the upper cover body are watertightly penetrated to be vertically movable in the upper cover body, and the existing valve that has been removed is lifted to a height where the replacement valve can be placed in the mark. It comprises a member, a replacement valve movably housed in the lower cover body to a position where the existing valve has been removed, and a drive member for moving the replacement valve. The replacement valve is provided with a stretchable pipe joint and an operating member for expanding and contracting the pipe joint. A drain valve is provided on the lower cover body.

In the above, a moving base for mounting the replacement valve may be provided on the bottom wall of the lower cover body, and the moving base may be moved by the driving member.

[0007]

[Operation] An example of the procedure for replacing the existing valve will be described. When replacing the existing valve, first, the lifting member is attached to the existing valve, and the lower cover body is arranged under the water supply pipe line near the valve including the existing valve. Next, the replacement valve is housed in the lower cover body, and the connection between the existing valve and the water supply pipe with a bolt or the like is released. Next, the upper cover body is attached to the lower cover body from above so that the water supply pipe line is sandwiched. As a result, the surroundings of the existing valve are watertightly covered by the upper and lower cover bodies. Next, the existing valve is hoisted by the hoisting member, and the replacement valve is moved by the driving member to the mark so that the axes are aligned. After the arrangement, the pipe joint is extended by the actuating member provided on the replacement valve, and the opening surfaces on both sides thereof are brought into contact with the opening surface of the pipe line. After the contact, the drain valve is opened to drain the water in the upper and lower cover bodies to the outside. next,
Remove the upper cover from the lower cover and connect the replacement valve and the water supply line with bolts. After that, if the lower cover body is removed, the replacement work is completed. In the above, the water in the water supply line tries to flow out from between the existing valves that have been removed, but the upper and lower cover bodies prevent the water from leaking to the outside, and therefore the existing valve can be opened without water interruption. It can be replaced.

[0008]

1 to 5 show one example in which the present invention is applied to a device for replacing an existing valve buried in the ground. 1 is a vertical sectional front view of the above-described embodiment, FIG. 2 is a central vertical sectional left view of an essential part of FIG. 1, FIG. 3 is a central longitudinal sectional right view of an essential part of FIG. 1, and FIG.
FIG. 5 is an enlarged view of part A of FIG.

Reference numeral 1 is a water supply conduit buried in the ground, and 2 is an existing valve connected to the conduit via a short pipe 3. Reference numeral 4 is a pit excavated around the water supply pipe line 1 near the valve including the existing valve 2, and the replacement work of the existing valve 2 is performed in this pit.

Numerals 5 and 6 are a pair of rectangular tubular upper and lower cover bodies for vertically and vertically sandwiching the existing valve 2 and the water supply conduit 1 in the pit 4 to cover them in a watertight manner. A keeper 10, which joins the outwardly projecting flanges 7 and 8 and is provided at a portion of the flanges facing the water supply pipe line 1 and facing each other,
It is provided via 11 via a bolt or the like so as to be detachable.

As shown in detail in FIGS. 4 and 5, the keepers 10 and 11 are semi-circular portions 12 formed so that the flange 8 can cover the lower half of the water supply conduit 1 at the center of the upper end of the lower cover body 6, A semi-circular portion 13 that is integrally formed on the opposite side (inner side) of the flange 8 and is continuous with the semi-circular portion 12 so as to be able to cover the lower half of the water supply conduit 1, and both sides of the semi-circular portion 13 on the inner side A keeper portion 15 composed of a flange portion 14 extending integrally with the flange 8 from the
And a keeper portion 17 composed of a semi-circular portion 16 formed so as to cover the upper half portion of the water supply conduit 1 on the flange 7 at the center of the lower end of the upper cover body 5, and the keeper portion 17 is a separate body from the upper cover. Keeper part on the opposite side (inner side) of the flange 7 of the body 5.
15 has a semi-circular portion 18 that is detachably provided and that is capable of covering the upper half portion of the water supply conduit 1, and a keeper portion 20 that is a flange portion 19 that extends from both sides on the inside side. .. Watertight packings 22 and 23 are provided on the inner surfaces along the walls of the upper and lower cover bodies 5 and 6 of the keeper portions 15 and 17, respectively. Bolt the flanges 7 and 8 of these keeper parts 15 and 17
By tightening with 24 etc., with the upper and lower cover bodies 5, 6,
The existing valve 2 and the like inside can be watertightly covered.

Reference numeral 25 is a replacement valve, and 26 is a moving table on which the replacement valve 25 is mounted. The moving table 26 is guided by a guide member 28 by a bevel gear type driving member 27 provided outside the lower cover body 6. It can be moved to the side where the existing valve 2 is located from the direction orthogonal to the water supply conduit 1. Reference numeral 29 is an operation handle of the drive member 27. Further, a pipe joint 30 is provided on the opening side of the exchange valve 25, which is connected to the water supply line 1, so that the opening surface can be expanded and contracted by a springback type cylinder 31 provided on both sides.

Reference numeral 35 is a suspender attached to the existing valve 2, 36 is a suspending rod which penetrates the upper wall of the upper cover body 5 in a watertight manner and is vertically movable in the upper cover body 5, and has a lower end portion. Are attached to the upper end of the hanger 35 via connecting bolts 37. The upper end of the hanging rod 36 is connected to a tie bolt 41 of a double-acting cylinder 40 installed upside down on a hood 38 standing upright on the upper wall of the upper cover body 5. In this double-acting cylinder 40, the tip of a piston rod 42 (see FIG. 6) is connected to a suspension plate 43 through which a tie bolt 41 penetrates, and the suspension plate 43 is attached to a bonnet 38 with a bolt or the like not shown. Reference numeral 45 is an eyebolt provided on the hanging plate 43. The existing valve 2 can be lifted up to a height at which the replacement valve 25 can be arranged at the mark by the lifting tool 35 or the like.

Reference numeral 47 is a manual hydraulic pump connected by a spring-back type cylinder 31 and a water supply pipe 48, and 50 is a double-acting cylinder.
A manual hydraulic pump connected by 40 to the oil feed pipe 51, 52 and 53 are through holes and a lid provided in the upper cover body 5, and the through hole 52 opened when the suspending tool 35 and the suspending rod 36 are connected. The connecting bolt 37 can be inserted and attached via the.
55 and 56 are viewing windows for knowing the inside of the cover bodies 5 and 6,
Reference numeral 57 is a drain valve provided on the lower cover body 6, and 58 is a supply / exhaust valve provided on the upper cover body 5.

The operation of this embodiment will be sequentially described with reference to FIGS. When replacing the existing valve 2, first attach the hanger 35 to the existing valve 2 and at the same time lower the cover 6
Is disposed below the water supply pipe 1 including the existing valve 2, and the keeper 15 and the keeper 20 are connected to fix the lower cover body 6 to the water supply pipe 1. Next, the replacement valve 25 is placed on the moving table 26 in the lower cover body 6 so as to be lined up with the existing valve 2, and the connection between the existing valve 2 and the water supply pipe 1 by a bolt or the like is released.

Next, the upper cover body 5 is aligned with the lower cover body 6 from above so that the water supply conduit 1 is held, and the keeper portion is held.
Attach both cover bodies 5 and 6 by tightening flanges 7 and 8 of 15 and 17 with bolts 24 or the like. As a result, the surroundings of the existing valve 2 are watertightly covered by the upper and lower cover bodies 5, 6. At this time, the upper and lower cover members 5, 6 are
It is needless to say that a sheet packing (not shown) is interposed on the four sides of the contact surface between the upper cover body 5 and the lower cover body 6 when they are joined together.

Next, the lid 53 is removed, and the through hole 52 is used to connect the upper end of the suspender 35 and the lower end of the suspension rod 36 penetrating the upper wall of the upper cover body 5 with a mounting bolt 37. After connection, lid
Attach the 53 and attach the hanging plate 43 to the bonnet.
Attach to 38 with bolts.

Next, the drain valve 57 is closed, the supply / exhaust valve 58 is opened, and the hydraulic pump 50 is operated to extend the double-acting cylinder 40 and the existing valve 2 is lifted as shown in FIG. Then, after removing the attachment of the hanging plate 43 and the bonnet 38 with the bolts or the like, the wire 60 is hung on the eyebolt 45, and the crane hook 61 is hooked on the eyebolt 45 to hang it up by the crane. In 6 the existing valve 2 is completely withdrawn from the line 1. During this time, when the covers 5 and 6 are filled with water, the supply / exhaust valve 58 is closed.

Next, while checking the inside of the cover bodies 5 and 6 through the viewing windows 55 and 56, the handle 29 is operated to drive the driving member.
The movable table 26 is moved by 27, the replacement valve 25 is arranged at the mark of the existing valve 2 as shown in FIG. 8, and its axis is aligned with the axis of the conduit 1. After installation, operate the water pressure pump 47 to operate the spring-back type cylinder 31 to extend the pipe joint 30, and replace the replacement valve.
The opening surfaces of both sides of 25 are extended and brought into contact with the opening surfaces of the conduits 1, respectively, and the replacement valve 25 is held in the conduit 1 via the short pipe 3 in a watertight manner.

Next, the drain valve 57 and the air supply / exhaust valve 58 are opened to drain the water in the upper and lower cover bodies 5, 6 to the outside. After draining, the keeper portion 15 and the keeper portion 17 are uncoupled, the upper cover body 5 is removed from the lower cover body 6, and the replacement valve 25 and the water supply pipe line 1 are connected by bolts or the like. After that, the keeper section 15
The lower cover body 6 is removed by uncoupling the keeper portion 20 and the keeper portion 20. This completes the replacement work.

In the replacement work, the water in the water supply line 1 tries to flow out from between the removed existing valves 2, but the upper and lower cover bodies 5, 6 prevent the water from leaking out. Therefore, it is possible to replace the existing valve 2 without water and therefore without water interruption.

Incidentally, it goes without saying that the procedure of the replacement work is only an example, and the work may be performed in a procedure other than this. Further, the structure of the upper and lower cover bodies 5, 6 and the suspending tool 35 and the suspending rod 36 are merely preferable examples, and the present invention is variously modified within the scope of the invention.
It can be modified.

[0023]

Since the invention of claim 1 has the above-mentioned structure, the existing valve can be replaced without disconnecting the water supply pipe line. Therefore, there is no inconvenience to the user due to the stop of the water supply, and the trouble that the red water is generated and the clouding phenomenon in which the water becomes cloudy occurs is released. According to the second aspect of the present invention, the replacement valve can be easily moved by the movable table, and the replacement workability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a replacement device according to an embodiment of the present invention.

FIG. 2 is a left side view of a central longitudinal section of a main part of FIG.

FIG. 3 is a right side view of a central longitudinal section of an essential part of FIG.

FIG. 4 is an enlarged view of part A of FIG.

FIG. 5 is a partially enlarged perspective view of a keeper portion.

FIG. 6 is an operation explanatory view.

FIG. 7 is an operation explanatory view.

FIG. 8 is an operation explanatory view.

[Explanation of symbols]

 1 Water supply pipe 2 Existing valve 3 Short pipe 4 Pit 5 Upper cover body 6 Lower cover body 7,8 Flange 10,11 Keeper 25 Replacement valve 26 Moving stand 27 Drive member 30 Pipe joint 31 Spring back type cylinder 35 Lifting device 36 Hanging rod 37 Connecting bolt 38 Bonnet 40 Double-acting cylinder 41 Tie bolt 42 Piston rod 43 Hanging plate 47 Hydraulic pump 48 Hydraulic pump 50 Water supply pipe 51 Oil supply pipe 52 Through hole 53 Lid 57 Drain valve

Claims (2)

[Claims] 1. A device for replacing an existing valve connected to a water supply line without disconnecting the water line, the device being detachably provided, and the water supply line near the valve including the existing valve is provided from above and below. A pair of upper and lower cover bodies that are sandwiched and covered in a watertight manner and a pair of upper and lower cover bodies that penetrate the upper wall of the upper cover body in a watertight manner and are vertically movable are provided. A lifting member for lifting the replacement valve to a height at which the replacement valve can be arranged, a replacement valve movably accommodated in the lower cover body to a position where the existing valve is removed, and a drive member for moving the replacement valve. A replacement device for an existing valve, wherein the replacement valve is provided with an expandable pipe joint and an operating member for expanding and contracting the pipe joint, and a drain valve is provided in the lower cover body. 2. The existing valve replacing device according to claim 1, wherein a moving base for mounting the replacement valve is provided on a bottom wall of the lower cover body, and the moving base is moved by the drive member.