JP2791232B2 - Piping installation protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective device for use in the construction of primary and secondary piping such as a pump, a header, a refrigerator, a heat exchanger, and an air conditioner.

[0002]

2. Description of the Related Art Pumps, headers, refrigerators, heat exchangers,
In the primary and secondary pipes of an air conditioner or the like, an on-off valve such as a butterfly valve and a check valve are generally piped together with a short pipe of an appropriate length for mounting an instrument. Rust, debris, or short pipes that are generated or fall off during piping
There is a risk of fouling or damage due to welding debris. For this reason, conventionally, it is conventional to construct a pipe by using a dummy pipe instead of the valve or the short pipe, and to remove the dummy pipe after the completion of the installation and to attach a valve or a short pipe which is an original pipe member. It was common.

FIG. 3 is a partial sectional side view showing an example of a half section, in which 21 is a primary or secondary pipe such as a pump or header, 22 is a dummy pipe, and 23 is connected to equipment such as a pump. The pipe 24 is a pipe that sends out a fluid from a pump or the like or sends a fluid to the pump or the like. And
The dummy pipe 22 has an appropriate length in place of the above-described valve and short pipe, and includes an upper flange 22a and a pipe 22.
b and the lower flange 22c are welded, and the upper flange portion 22a is a blind flange so that the pipe 24 and the dummy pipe 22 do not communicate with each other as shown in the figure. Note that the lower flange 22c does not need to be a blind flange, and it is general to use an annular flange for weight reduction and cost reduction.

[0004] By using this dummy tube 22,
Pipes 23 and 24 are installed at the correct positions,
Rust, dust, welding debris, and the like that are generated or fall off at the time of upper construction are received on the upper flange 22a. After the installation of the pipe is completed, the connection bolt 25 and the nut 26 between the flange 24a of the pipe 24 and the upper flange 22a of the dummy pipe 22 are removed, and the space between the flange 24a and the upper flange 22a is widened. After removing the received rust, dust, welding debris, etc., the dummy pipe 22 is removed and a regular valve or short pipe is incorporated.

[0005] Such a conventional method has a problem that the dummy pipe 22 is unnecessary after the completion of the construction, so that the cost is high, the construction is troublesome twice, and the construction cost is high.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the construction of primary and secondary pipes such as pumps and headers.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a protection device for piping construction according to the present invention is constructed as follows. That is, the thin plate is constituted by a circular portion having a size substantially inscribed in a plurality of bolt holes provided in the pipe flange in the circumferential direction, and a tongue-like portion projecting outward from a part thereof. In this case, the thin plate is preferably a steel plate or a gasket sheet such as a compressed asbestos sheet. Further, the protective device for piping work may be set with a piping unit, a connecting pipe and the like, and may be adhered to the piping unit, the connecting pipe and the like to such an extent that it can be easily peeled off.

[0008]

[Function] Primary and secondary piping such as pumps, headers, refrigerators, heat exchangers, air conditioners, etc., are arranged in such a manner that a check valve, a short pipe for mounting an instrument, a butterfly valve, etc. are sequentially placed in the vertical direction. And the piping installation protection device of the present invention is inserted into a flange connection portion with the piping above the piping, and the subsequent piping is performed. Rust, dirt, welding debris, etc. that are generated or fall off during the subsequent piping work fall onto the protective equipment for pipe work, accumulate, and enter the valves and short pipes, causing them to become dirty or damaged. There is no.

After the completion of the piping work, remove the bolts and nuts at the flange connecting portion sandwiching the protection device for piping work,
After widening the gap between the flanges and removing the rust, dirt, welding debris, etc., which are piled on the protective device for piping work from the clearance, the tongue-shaped portion of the protective device for piping work is pulled out.
Thereafter, a gasket is inserted and the flange connection is tightened.

[0010] For this reason, since no dummy tube is required, the cost is not increased, and the construction cost is hardly increased twice and the construction cost is not increased. In addition, when the piping construction protection device is set with a piping unit or a connection pipe , arrangement is easy, and if the protection device is adhered to the piping unit or a short pipe to such an extent that it can be easily peeled off, the construction is easy.

[0011]

FIG. 1 is a half sectional partial side view showing an example of a primary or secondary pipe of a pump or the like equipped with an embodiment of a pipe construction protection device of the present invention. FIG. 2 is a plan view of the piping installation protection device shown in FIG. 1 and 2, 1 is a piping installation protection device, 2 is a butterfly valve, 3 is a lower connection pipe, 4 is an upper connection pipe, 5 is a pressure gauge, 6
Is a thermometer, and 7 is a gasket. Also, 8, 9
And 10 are bolts, 11, 12, and 13 are nuts, 14 is a pipe from a pump or the like, and 15 is a pipe for sending fluid from the pump or the like or sending fluid to the pump or the like.

In FIG. 1, a lower connecting pipe 3 is connected to a pipe 14 from equipment such as a pump, a header, a refrigerator, and an air conditioner.
Are connected by a bolt 9 and a nut 12 via a gasket 7. A check valve is often mounted at this connection position. A pressure gauge 5 and a thermometer 6 are mounted on the lower connection pipe 3, and the butterfly valve 2 is mounted between the lower connection pipe 3 and the upper connection pipe 4 with bolts 10 and nuts 13. In some cases, the lower connection pipe 3, the butterfly valve 2, and the upper connection pipe 4 may be treated as a piping unit integrally or by connecting a check valve thereto. Then, the pipe installation protection device 1 of the present invention is mounted between the connection flange 4a of the pipe unit or the upper connection pipe 4 and the connection flange 15a of the pipe 15 connected thereto, and the bolt 8 and the nut 1
1 connected. The piping installation protection device 1
As shown in FIG. 2, a circular portion 1a having a size internally provided in several holes 4b and 15b for bolts 8 provided in connection flanges 4a and 15a, and a tongue shape projecting outward from a part thereof. 1b, which is a thin steel plate having a cross section as shown by a two-dot chain line in the figure.
A projecting portion 1c projecting upward by about 5 mm is formed to prevent dust and the like from falling.

Next, the operation of the piping installation protection device 1 of the present invention will be described. After the piping is performed as described above, the piping is performed prior to the piping 15. At that time, rust, dirt, welding debris, and the like are generated or dropped and fall and fall on the piping protection device 1. They do not accumulate and enter into the butterfly valve 2 and the connecting pipes 3 and 4 below and do not contaminate or damage them. After the completion of the pipe installation, the connection flanges 4a and 1 sandwiching the pipe installation protection device 1
After removing the bolt 8 and the nut 11 of 5a and widening the gap between the flanges 4a and 15a and removing the rust, dust, welding debris, and the like that are piled on the piping construction protection device 1 from the gap, the piping construction is performed. The tongue-like portion 1b is pinched out of the protective device 1 and thereafter, an annular gasket is inserted, and the connection flange 4a of the upper connection pipe 4 and the connection flange 15a of the pipe 15 are tightened with the bolt 8 and the nut 11. . For this reason, since the dummy tube 22 as shown in FIG. 3 is not required, the cost does not increase, and it is hardly performed twice.
Construction costs do not increase.

When the piping installation protection device 1 is set together with the upper connection pipe 4, arrangement and the like are easy, and the gasket surface of the connection flange 4 b of the upper connection pipe 4 can be easily peeled off. When it is adhered to, it is easy to perform construction.

[0015]

As described above, the piping installation protection device of the present invention does not use dummy pipes for primary and secondary piping such as pumps, headers, refrigerators, heat exchangers, and air conditioners. Therefore, even if the pipe is constructed by directly mounting a valve or a short pipe, it is possible to prevent the rust, dust, welding debris, etc., generated or dropped at the time of the construction of the pipe, from being stained or damaged. For this reason, both the material cost and the construction cost of the piping construction work can be reduced, which is economical.

[Brief description of the drawings]

FIG. 1 is a half sectional partial side view showing an example of a primary or secondary pipe such as a pump equipped with an embodiment of a pipe construction protection device of the present invention.

FIG. 2 is a plan view of the piping installation protection device shown in FIG.

FIG. 3 is a half sectional partial side view showing an example of a pipe constructed using a conventional dummy pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping construction protection device 1a Circular part 1b Tongue part 4 Connecting pipe

Claims (5)

(57) [Claims] 1. A thin plate comprising a circular portion having a size substantially inscribed in a plurality of bolt holes provided in a pipe flange in a circumferential direction, and a tongue-like portion projecting outward from a part thereof. Protective equipment for plumbing construction. 2. The protection device according to claim 1, wherein the thin plate is a steel plate. 3. The piping installation protection device according to claim 1, wherein said thin plate is a gasket sheet such as a compressed asbestos sheet. 4. The piping installation protection device according to claim 1, wherein the piping unit and the connecting pipe are set. 5. The piping construction protection device according to claim 1, wherein the piping unit and the connection pipe are adhered to such an extent that they can be easily peeled off.