JPH05340493A - Piping unit - Google Patents

Abstract

PURPOSE:To reduce the number of working processes and to improve economical efficiency by a method wherein two ends form a pipe coupling structure and pipe coupling structures for a flexible pipe are formed to the branch pipes of T-pipes arranged on the upper stream side and the downstream side through respective shutoff valves. CONSTITUTION:A strainer 3, a shutoff valve 5, and a T-pipe 9 are integrally intercoupled, in the order, in a position situated upper stream from a main valve 2, and a reducer 4, a shutoff valve 6, and a T-pipe 10 are intercoupled, in the order, in a position situated downstream from the main valve, and piping coupling structures 9a and 10a are arranged to the two ends thereof. Pipe coupling structures 11 and 12 are arranged to the branch pipes 9b and 10b of the T-pipes 9 and 10 through the shutoff valves 6 and 7, respectively. At a construction site, pipings on the upper stream side and the downstream side provided at respective terminals with pipe flanges coupled to pipe flanges 9a and 10a being the pipe coupling structures of the two ends of a piping unit 1 may be arranged with a distance therebetween being equal to the length of the piping unit 1, and work at a site is extremely facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping unit, and more particularly to a piping unit used for piping of building equipment such as an air conditioner and a cold / hot water generator.

[0002]

2. Description of the Related Art Valves and the like are generally installed in piping through which cold and hot water, steam and the like of building equipment such as air conditioners and hot and cold water generators pass, as shown in the piping diagram of FIG. In FIG.
Reference numeral 21 is a main valve, 22 and 23 are reducers, 24 is a strainer, and 25, 26 and 27 are closing valves. Note that FIG.
In, the short pipes 29 and 30 are appropriately inserted between the pipe parts, and 28 is a bypass pipe.

The main valve 21 is a flow rate adjusting valve, a temperature adjusting valve, a pressure reducing valve, a steam valve, a trap, etc. according to the purpose. In order to improve the adjustability of these main valves 21, the size before and after the main valve 21 is adjusted. It is often of a small size and for this reason reducers 22 and 23 are provided before and after the main valve 21. Further, the main valve 21 is often a power operated valve such as an electric valve or a pneumatic valve. The strainer 24 is for removing foreign matter in the fluid that may adversely affect the operation of the main valve 21, and the stop valves 25, 26 and 27 are for checking and repairing the main valve 21 and cleaning the strainer 24. And the like for stopping the flow through the main valve 21 and allowing the flow through the bypass pipe 28 when the equipment is not stopped. In normal times, the closing valves 25 and 26 are opened and the closing valve 27 is closed. The valve is closed, and is used for inspection, repair, cleaning, etc.
5 and 26 are closed, and the stop valve 27 is opened.

[0004] Such piping is generally installed at a high place near the ceiling, and piping work is performed on site to adapt to the location. Also, the bypass piping is installed in the field by welding or screw connection. For this reason, it is necessary to determine the dimensions on the site, and since the work is performed at a high place, the work is extremely difficult and troublesome, and a large number of man-hours are required. Further, two reducers 22 and 23 are required before and after the main valve 21, a piping place corresponding to that length is required, and a wide piping space is required because the bypass pipe is fixed.

[0005]

According to the above-mentioned conventional technique, the present invention is extremely difficult and troublesome, requires a lot of man-hours, requires a large space for piping, and requires maintenance work. It is intended to improve piping of building equipment such as air conditioners and hot / cold water generators which have problems such as being troublesome.

[0006]

In order to solve the above problems, the piping unit of the present invention is constructed as follows.
A strainer, a shutoff valve, and a T-shaped pipe are connected upstream of the main valve, and a shutoff valve and a T-shaped pipe are sequentially connected integrally on the downstream side of the main valve. The T-shaped branch pipe is provided with a pipe joint structure for a flexible pipe through a stop valve.

In this case, the main valve has a size smaller than the sizes of the upstream side and the downstream side of the main valve, the strainer has a pipe joint portion having a different diameter, and the main valve and the closing valve on the downstream side. A reducer may be provided between the pipes, the strainer may be an upper lid type, and the pipe joint structure provided at the tip of the branch pipe may be a one-touch type. Further, the shutoff valves on the upstream side and the downstream side may be butterfly valves. The strainer described above is a U-shaped or Y-shaped strainer having pipe joint portions with different diameters.

[0008]

Since the piping unit of the present invention is integrally assembled at the factory together with the T-shaped pipes provided at both ends, at the construction site, the pipe joint structure to be connected to the pipe joint structures at both ends of the pipe unit is terminated. The upstream side pipe and the downstream side pipe, which are included in the above, may be arranged at an interval equal to the length of this pipe unit, which makes the on-site construction extremely easy. Further, the work of mounting the piping unit between the upstream side piping and the downstream side piping is also extremely easy because only the standard pipe joint is connected.

If the strainer is of the upper lid type having a pipe joint portion of different diameter to fit the reduced size of the main valve, it is not necessary to provide a reducer on the upstream side of the main valve, and the strainer can be used accordingly. The unit becomes shorter. Further, even if the lid is opened for cleaning the strainer, the fluid inside does not flow down, so that the clothes of the worker are not soiled and the floor of the installation site is not soiled.

Since the T-shaped pipes are provided at both ends of the present piping unit, there is no need for a connecting work such as welding of the bypass pipe which is troublesome such as dimension adjustment, and the work man-hours on the site can be greatly reduced. It doesn't get dirty. In addition, when inspecting and repairing the main valve and cleaning the strainer without shutting down the equipment, the flexible pipe fitting structure provided for the flexible pipe on the T-shaped pipe through the stop valve By connecting the pipe joint structure at both ends, a bypass circuit is formed.Therefore, inspection, repair or cleaning can be performed by closing the stop valves located on both sides of the main valve and opening the stop valves connected to both branch pipes. Ready to go. If the pipe joint structure for connecting the flexible pipes is of the one-touch type, the flexible pipes can be easily connected.

As described above, when the piping unit of the present invention is used, the bypass piping is not fixed unlike the piping shown in FIG. 5, so that the piping space can be small and there is an obstacle in terms of equipment. Also, the flexible tube may be bent and coupled accordingly, and the installation location such as the pump chamber can be effectively used. In some cases, the flexible tube may be left connected. If at least the upstream and downstream stop valves of this piping unit are butterfly valves, the dimension of the butterfly valve is short, so that the piping unit is short and compact, and the installation space is small.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A piping unit of the present invention will be described with reference to the drawings. 1 is an external view showing an embodiment of a piping unit of the present invention, FIG. 2 is a vertical cross-sectional view of a strainer in the piping unit shown in FIG. 1, and FIG. 3 shows the piping unit of FIG. It is the piping diagram shown using the figure symbol. 1 and 3
In FIG. 1, 1 is a piping unit, 2 is a main valve, 3 is a strainer, 4 is a reducer, 5, 6, 7 and 8 are butterfly valves used as closing valves, and 9 and 10 are T-shaped pipes. The stop valves 7 and 8 may be ball valves.

The piping unit 1 is used for piping through which cold and hot water, steam and the like of construction equipment such as an air conditioner and a hot and cold water generator pass. The main valve 2 is a flow control valve, a temperature control valve,
A pressure reducing valve, a steam valve, a trap, and the like, which are smaller in size than the butterfly valves 5 and 6 in front of and behind them in order to improve their adjustability, and are power operated valves such as electric and pneumatic actuators. In addition, as shown in FIG. 4, the main valve 2 may be a three-way valve. The strainer 3 is for removing foreign matter in the fluid that may adversely affect the operation of the main valve 2. As shown in the vertical cross-sectional view of FIG. It is an upper lid type which is formed so as to pull out the filter 3b upward to clean it, and has pipe flanges 3c and 3d of different diameters at both ends, and is provided with a retainer for the filter 3b and a take-up rod 3e. There is.

A strainer 3, a butterfly valve 5 and a T-shaped pipe 9 are connected to the upstream side of the main valve 2, and a reducer 4, a butterfly valve 6 and a T-shaped pipe 10 are connected integrally to the downstream side of the main valve 2. I am doing it. Both ends thereof, that is, both outer ends of the T-shaped pipes 9 and 10 are standard flange type pipe joint structures 9a and 10a. In addition, the branch pipe 9 of the T-shaped pipes 9 and 10
butterfly valves 7 and 8 are connected to b and 10b,
A pipe joint structure for a flexible pipe, in the embodiment, male threads 11 and 12 are provided at the tip thereof. The pipe joint structure is preferably a one-touch type (simple quick joint structure). 1 and 3, the branch pipes 9b and 10b are shown facing downward, but as shown in FIG. 5, they may be provided laterally in the same direction. FIG. 4 shows another example, which is an example in which the three-way valves 5A and 6A are the above-mentioned shutoff valves. In this case, the shutoff valve for bypass can be omitted.

The piping unit 1 shown in FIG. 1 is generally assembled up to this state in a factory, and at the construction site, a pipe flange 9a which is a pipe joint structure at both ends of the piping unit 1.
The upstream side pipe and the downstream side pipe having the pipe flanges to be connected to the terminals 10a and 10a at the ends may be provided at intervals equal to the length of the pipe unit 1, and the on-site construction is extremely easy. Further, the work of mounting the piping unit 1 between the upstream side piping and the downstream side piping is extremely easy only by flange connection.

The strainer 3 has pipe flanges 3c and 3d having different diameters and is directly connected to the main valve 2 and the butterfly valve 5. Therefore, it is not necessary to provide a reducer with the main valve 2, and the piping unit 1 is shortened accordingly. If the strainer 3 is a flange of the same diameter,
A reducer is provided between the main valve 2 and the main valve 2. Further, even if the lid 3a is opened for cleaning the strainer 3, the fluid inside does not flow down, so that the clothes of the worker and the floor of the installation place are not soiled.

At both ends of the piping unit 1, T-shaped tubes 9 and 10 are provided.
Since it is provided, the troublesome work of connecting the bypass pipes such as dimension matching and welding is not required, the number of man-hours on the site can be greatly reduced, and the site is not polluted. Also, male threads 11 and 12 which are pipe joint structures for flexible pipes.
By connecting a flexible pipe prepared in advance to, opening the butterfly valves 7 and 8 and closing the butterfly valves 5 and 6, it is possible to inspect and repair the main valve 2 and clean the strainer 3 without stopping the equipment. it can. If the pipe joint structure for connecting the flexible pipes is of a one-touch type, the flexible pipes can be connected easily and easily.

As described above, when the piping unit 1 of the present invention is used, since the bypass piping is not fixed unlike the piping shown in FIG. 6, the piping space can be small and there is an obstacle in terms of equipment. Also, the flexible tube may be bent and coupled accordingly, and the installation location such as the pump chamber can be effectively used. In some cases, the flexible tube may be left connected.

Since the shutoff valves 5, 6, 7 and 8 of the piping unit 1 are butterfly valves, the dimension of the butterfly valves is short, so that the piping unit 1 is short and compact, and the installation space is small.

[0020]

Therefore, the piping unit of the present invention has various excellent effects. That is, since it is preassembled in a factory convenient for work, it is extremely easy and easy to work on site, which is generally work at high places, does not require cutting, welding, etc., is economical with few man-hours. Do not stain. Further, the installation space may be small, and even if there is an obstacle, the flexible pipe can be bent to avoid this, and the space on site can be effectively used. Alternatively, the flexible tube may remain connected.

Furthermore, if the strainer is in the form of an upper lid,
Even when the lid is opened, the fluid inside does not flow down, and the clothes of workers and the floor of the site are not polluted. Also, by using a butterfly valve as the shutoff valve, the piping unit can be made smaller and the installation space can be made even smaller.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of a piping unit of the present invention.

FIG. 2 is a vertical cross-sectional view of the upper lid type strainer of the piping unit shown in FIG.

FIG. 3 is a piping diagram showing the piping unit shown in FIG. 1 using graphic symbols.

FIG. 4 is a piping diagram showing another example.

FIG. 5 is an external view showing another example of the piping unit of the present invention.

FIG. 6 is a piping diagram showing an example of conventional piping using graphic symbols.

[Explanation of symbols]

 1 Piping unit 2 Main valve 3 Strainer 4 Reducer 5, 6, 7, 8 Closure valve (butterfly valve) 9, 10 T-shaped pipe 9a, 10a Pipe joint structure 9b, 10b Pipe joint structure for flexible pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Hatsuyama 3-17-30 Nae Station, Nakamura-ku, Aichi Prefecture Nagoya, Sect Engineering Co., Ltd.

Claims (5)

[Claims] 1. A strainer, a shutoff valve and a T-shaped pipe are connected to the upstream side of the main valve, and a shutoff valve and a T-shaped pipe are sequentially connected to the downstream side of the main valve, and both ends thereof are made into a pipe joint structure to form an upstream side. And a pipe unit for a flexible pipe provided on a branch pipe of a T-shaped pipe provided on the downstream side through a stop valve. 2. The piping unit according to claim 1, wherein a strainer provided on the main valve is provided with a pipe joint portion having a different diameter, and a reducer is provided between the main valve and the downstream stop valve. 3. The piping unit according to claim 1, wherein the strainer is a U-shaped strainer of an upper lid type. 4. The piping unit according to claim 1, wherein the strainer is a Y-type strainer having pipe joint portions with different diameters. 5. The piping unit according to claim 1, wherein the upstream and downstream stop valves are butterfly valves.