JPS60143291A - Method of mounting construction of pipe for continuous waterin case of repair, etc. of pipe body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for installing a valve to prevent water cutoff when repairing a pipe body, and more specifically, a method for installing a valve to prevent water cutoff in the pipe body when repairing a pipe body, etc., on the near side of the repaired area. This relates to a method of installing a valve for non-stop water in a tank where the valve is installed. Conventionally, when repairing existing pipes, construction methods have been attempted in which a valve such as a gate valve is installed in front of the repaired area without obstructing the flow of fluid inside the pipe. For example, as shown in Fig. 9 (a), the cutting machine 2
6, the pipe body 1b is cut, the cut piece is pulled up, and then a special short pipe 27 and a butterfly valve 28 are attached to the cut part as shown in FIG. However, in this construction method, it is necessary to cut the pipe body 1b, which takes a lot of time, and furthermore, the cut end of the pipe and the special short pipe 27 are separated.
This requires complicated work such as having to join the parts, which requires a large number of work days, number of workers, and number of parts.
Overall, there was a fatal drawback in that the installation work for the hull was very extensive. However, such valve installation work is required not only when repairing pipes as mentioned above, but also when replacing an existing valve with a new one, or in various other cases. An important challenge was to make the work easier while still taking advantage of the fact that valves could be installed without water being cut off. The present invention was made to solve these problems, and it is possible to install the valve very easily without requiring a lot of time or complicated work, and it greatly simplifies the entire construction work. It is an object of the present invention to provide a completely new and useful method for installing a valve without water cutoff when repairing a pipe body. In order to achieve such an object, the present invention covers and seals at least the upper and lower surfaces of the tube, and then provides a long hole for inserting a valve body into the cover and the sealed upper surface of the tube. A fitting hole is drilled in the longitudinal direction of the tube axis, and a fitting hole for fitting the protruding shaft portion of the lower end of the valve body is formed on the lower surface directly below the long hole of the tube body, and then at least the valve body side of the valve is integrated with the cover. After the valve is installed, the valve is lowered, and the valve body side is inserted into the tube body through the long hole, and the protruding shaft portion is fitted into the fitting hole, so that the valve body is installed so as to be rotatable within the tube body. There is a method for installing the valve. In other words, because of this installation method, the valve body can be easily inserted into the pipe body by drilling a long hole according to the length and width of the valve body, and the protruding shaft portion that protrudes from the valve body can be easily inserted. By fitting into the fitting hole on the lower surface, the valve body can be rotatably mounted within the tube body without wobbling. By rotating the valve body installed inside the tube so as to close the flow path of the tube, the fluid flow path inside the tube can be temporarily blocked, thereby making it possible to repair the repaired area. It becomes possible. Since the present invention allows the valve body to be mounted inside the pipe body using the method described above, there is no need to cut the pipe body as in the past, and there is no need to join the cut end of the pipe. , it is possible to significantly shorten the work time and make the work very easy.As a result, the number of work days, number of workers, number of parts, etc. can be significantly reduced compared to the conventional method, and the overall valve installation work can be reduced. This has resulted in a particularly remarkable effect in that it can be extremely simplified. Moreover, since the fluid flow path can be shut off simply by rotating the valve body of the valve inserted into the pipe body through the elongated hole, there is an advantage that subsequent repair work can be started in a short time. Furthermore, even if it is necessary to remove the valve without removing it, keep the valve body rotated to the position along the drilling direction of the elongated hole, that is, the same position as when it was inserted into the pipe body, and then raise the valve stem. The valve body can be easily removed from the pipe body by simply using the pipe, making the valve removal process extremely easy, and furthermore, such valve removal and installation work can be easily done over and over again. There are special advantages. EMBODIMENT OF THE INVENTION Hereinafter, the embodiment of the valve installation method of this invention is demonstrated according to one Example shown in the drawing. First, as shown in FIG. 1, the upper cover 2, the center cover 3, and the upper cover 4 are stacked and attached to the upper surface of the tube body 1 to which the HARTZ is to be attached. In this case, the respective cover units 2, 3.4 are connected by bolts 8, 8 at the respective flange portions 5, 6.7. Similarly, a lower cover integral 9 is attached to the lower surface of the tube body 1. At this time, the upper cover 4 and the lower cover 9 are fully fitted with gaskets 10 and 11 to provide a seal between them and the tube body 1, respectively. Further, a gate valve 14 for opening and closing the inside of the central cover unit 3 is provided on the side of the central cover unit 3 so as to be able to move back and forth. Next, as shown by the two-dot chain line in FIG.
Pipe body 1, which is not shown by the dashed-dotted line in the figure, is to become both ends of the elongated hole 15
Holes 13, ], 3 are bored in two places on the upper surface of the holder as shown in FIG. In this case, water will flow out of the pipe body 1 from the hole 13.13, but since the cover 2.3.4 is attached to the top of the pipe body 1, water will not leak to the outside. There is no problem, and the flow within the tube body 1 is not interrupted. Next, after raising the drill 12 and reciprocating the gate valve 14 to close the inside of the central cover unit 3 to prevent water from leaking, the drill 12 is removed together with the upper cover unit 4, and the other upper cover unit (not shown) is removed. ) and install a gear (not shown) inside the replaced upper cover. Then, the gate valve 14 is moved back to open the inside of the central cover unit 3 again, and then the gear is lowered to cut between the holes 1, 3, and 13 formed in the upper surface of the tube body 1 with the float. As shown in FIG. 3, a long hole 15 is bored in the axial direction of the upper surface of the tube body 1. Even in this case, the water flowing out from the elongated hole 15 is prevented from leaking to the outside by each integral cover 2.3.4. After the elongated hole 15 is drilled in the upper surface in this way, the valve body is then drilled with a drill (not shown) at the center of the lower surface of the pipe body 1 and directly below the elongated hole 15 as shown in FIG. A fitting hole 16 for fitting the protruding shaft portion 29 protrudingly provided on the lower surface of 20 is bored. At this time, the water flowing out from the fitting hole 16 is prevented from leaking to the outside by the lower cover integral 9. Next, after raising the gear and closing the inside of the central cover unit 3 again with the gate valve 14, the gear is removed together with the upper cover unit and replaced with another upper cover unit 4a, and the valve 17 is installed inside the upper cover unit 4a. Installing. That is, as shown in FIG. 5, this valve 17 has a disk-shaped valve body 2o integrally attached to the tip side of a valve stem 19 inserted through an insertion hole 18 on the upper surface of the upper cover unit 4a. It has a J-digit configuration, and a protruding shaft portion 29 is provided in a protruding manner at the lower θ1) portion of the valve body 2o. and! The valve stem 19 has a female threaded portion 21 in part.
It is formed into a substantially cylindrical shape with a screw installed therein, and is screwed into a rotating rod 23 having a male threaded part 22 that can be screwed together with the female threaded part 21,
It is constructed so that it can be raised and lowered by rotating a handle 24 provided at the upper end of the rotating rod 23. Furthermore, a lever 25 is attached to the upper side of the valve stem 19 for rotating the valve body 2Ofc together with the intermediary 4'J]9. After the valve 17 having such a configuration is installed in the upper cover unit 4, the gate valve 14 is moved back again to open the central cover unit 3, and then the handle 24 is rotated to lower the valve stem 19. , the valve body 20 attached to the distal end side of the valve stem 19 is inserted into the pipe body 1 through the elongated hole 15 . After inserting the entire valve body 20 into the pipe body 1, the valve body 20
When the downwardly protruding protruding shaft portion 29 is inserted into the insertion hole 16 formed in the lower surface of the tube body 1, the center of rotation of the valve body 20 is reliably positioned. In this way, the valve body 20 can be taken into the pipe body 1 without wobbling, and then by operating the lever 25, the valve body 20 can be removed.
When the tube body 1 is rotated perpendicularly to the longitudinal direction of the tube axis, the flow passage within the tube body is temporarily blocked, thereby making it possible to perform repair work on the repaired portion of the tube body 1. Furthermore, after the repair work is completed, the flow of water within the pipe body 1 is restarted by rotating the valve body 20 in the longitudinal direction of the pipe axis. Even when the valve 17 is not removed, the valve body 20 can be easily removed from the elongated hole 15 by simply lifting the valve stem 19 while positioning the valve body 20 in the longitudinal direction of the pipe axis as described above. It is possible,
Therefore, the valve 17 can be removed very easily. As described above, in the above embodiment, the elongated hole 15 into which the valve body 20 can be inserted is formed in the upper surface of the pipe body 1, and the insertion hole 16 into which the protruding shaft portion 29 is inserted is formed in the lower surface. Since the valve 17 can be installed with very simple work, the work time can be significantly shortened compared to the conventional method, and the overall valve installation work can be greatly simplified. It has come to have a remarkable effect. In the above embodiment, the elongated hole 15 is provided on the two sides of the tube l.
Since the holes 13.13 were previously drilled at the positions that should become both ends of the long hole 15, the subsequent long hole 15
It has the advantage of being easy to drill, but
Drilling the holes 1.3.13 is not necessarily an essential step for the present invention. Further, in this embodiment, after the H hole 15 is drilled in the upper surface of the tube body 1, the insertion hole 16 is bored in the lower surface, but the order of drilling may be reversed, and the order is as follows. It's never a question. The point is that the elongated hole 15 and the fitting hole 16 may be bored before inserting the valve 17 into the tube body 1. Further, in this embodiment, the elongated hole 15 is formed by a gear, but the means for forming the elongated hole 15 is never in question, and the means for forming the hole 13.13 and the insertion hole 16 are also never implemented. It is not limited to the example drill. Furthermore, the means for raising and lowering the valve stem 19 and the means for rotating the valve body 20 are by no means limited to the handle 24 and lever 25 of the embodiment. Further, in this embodiment, the fitting hole 16 for fitting the protruding shaft portion 29 is formed through the tube body 1, but in addition to this,
As shown in the figure, it may simply be formed in a concave shape without being penetrated, and in this case, the lower cover 9 is not required. Furthermore, in this embodiment, the valve 1 at the time of repairing the pipe body 1
Although the installation method described in item 7 is explained above, the application of this method is not necessarily limited to the repair of pipe bodies. For example, when replacing an existing valve itself, installing a building,
The present invention can also be applied to applications such as cutting around rivers due to widening, removing existing pipes, etc. Furthermore, what flows through the pipe body 1 only needs to be a fluid, and therefore, it is of course possible to apply the present invention to liquids and gases outside the waterside of the embodiments. Other gate valves14. Each cover is integrated 2. 3. 4. , 9
These configurations are by no means limited to the embodiments, and can all be modified within the intended scope of the present invention.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing the installation process of each cover. FIG. 2 is a schematic plan view showing the process of drilling both ends of a long hole. FIG. 3 is a schematic plan view showing the step of drilling a long hole. FIG. 4 is a schematic bottom view showing the step of drilling the insertion hole. FIG. 5 is a vertical sectional view showing the process of mounting the valve into the cover. FIG. 6 shows the process of inserting the valve into the tube body, in which (A) is a longitudinal sectional view of the main part, and (B) is a schematic plan view seen from the entry direction of (A). FIG. 7 is a schematic plan view showing when the valve body is rotating. FIG. 8 is an enlarged sectional view of main parts of another embodiment. Figure 9 shows a schematic cross-sectional view of the conventional valve installation method.
A) is when the tube is cut, and (B) is when the valve is installed. 1...Pipe body 15...Elongated hole 16...Insertion hole 17...Valve 19...Valve stem 2o...Valve body Applicant Suiken Co., Ltd. Agent Patent attorney Noboru Fujimoto Noboru 1 Figure 12 / -Ib I'D Figure 5 Figure 6 (A)

Claims (1)

[Claims] At least the upper and lower surfaces of the tube body 1 are covered and sealed with a cover or the like, and then a long hole 15 into which the valve body 20 can be inserted in the longitudinal direction of the tube axis is formed in the cover and the sealed upper surface of the tube body 1. The pipe body 1 is perforated in the axial direction of the body 1.
A fitting hole 16 into which a protruding shaft portion 29 protruding from the lower end of the valve body 20 can be fitted is bored in the lower surface directly below the elongated hole 15, and then at least the valve body 20 side of the knob 17 is integrated with the cover. After the valve 17 is inserted into the elongated hole 15, the valve 17 is lowered.
Then insert the valve body 20 side into the tube body 1 and fit the protruding shaft portion 29 into the fitting hole 16 to remove the valve body 20.
A method for installing a valve for water outage during repair of a pipe body, etc., characterized in that the valve is installed so that it can rotate freely within the pipe body 1 without blocking its flow path.