JPH0712299A - Piping unit - Google Patents

Abstract

PURPOSE:To provide a lightweight and compact piping unit and simplify the altitude works at the site by coupling a bypass unit consisting of a bypass piping and a bypass valve between a branch pipe to the upstream T-pipe and a branch pipe to the downstream T-pipe. CONSTITUTION:A strainer 4, shutoff valve 5, and T-pipe 7 are installed upstream of a main valve 3, while a reducer 9, shutoff valve 6, and T-pipe 8 are coupled in the downstream of the main valve 3. The two T-pipes 7, 8 are structured so that the main pipes 7b, 8b are made in flange form, and branch pipes 7a, 8a are of screw-in type having a smaller diameter than the main pipes 7b, 8b, and slip stopping structures 7c, 8c in the form of a band are furnished on the peripheral surface. A bypass unit 2 consisting of a bypass piping 11 and bypass valve 10 is coupled between the branch pipe 7a of the upstream T-pipe 7 and the branch pipe 8a of the downstream T-pipe 8. This permits lessening the installation space and allows facilitating the maintenance and repair works.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In general, pipes for building equipment such as air conditioners and cold / hot water generators are provided with valves and the like as shown in the piping diagram of FIG. In FIG. 5, 21 is a main valve, 22
And 23 are reducers, 24 are strainers, and 25 and 2
Reference numeral 6 is a closing valve, 27 is a bypass valve, 28 and 29 are T-shaped tubes, 30, 31, 32, 33, 34, 35 and 36 are short tubes, and 37 is a bypass valve.

The main valve 21 is a flow rate control valve, a temperature control valve, a pressure reducing valve, a steam valve, a trap, etc. according to the purpose, and in order to improve the controllability 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 and 26 and the bypass valve 27 are used for the inspection, repair and strainer 24 of the main valve 21. This is for stopping the flow through the main valve 21 and allowing it to flow through the bypass valve 27 when cleaning the equipment, etc. without stopping the equipment, and normally, the closing valves 25 and 26 are opened.
The bypass valve 27 is closed, and the stop valves 25 and 26 are closed during inspection, repair, cleaning, etc.
7 is open.

The short pipes 30, 31, 32, 33, 3
4, 35 and 36 are the main valve 21, the reducers 22 and 2
3, the direct connection of the strainer 24, the shutoff valves 25 and 26 and the adjacent ones of the tees 28 and 29,
Since the wafer type butterfly valve is often used for the main valve 21 and the shutoff valves 25 and 26 and long piping bolts are used, it is used when it is difficult to insert the piping bolts. In this case, the entire pipe becomes long and heavy, the bypass part also becomes long and heavy, the number of man-hours required for the piping work is increased, the fishing band needs to be solid, and the work of covering the heat insulating material is also troublesome and costly. .
Also, a large piping space is required.

Further, such a pipe is generally attached to a high place near the ceiling, and the pipe work is carried out at a site adapted to the place. Also, the bypass piping is installed in the field by welding or screw connection. Therefore, it is necessary to determine the dimensions on site, and the work is extremely difficult and troublesome because it is a work at a high place, and a large number of man-hours are required.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a pipe for building equipment such as an air conditioner and a hot and cold water generator according to the prior art.
It is extremely difficult and troublesome, requires a lot of man-hours, requires a large space for piping, is troublesome in maintenance work, and needs to tighten the straps. It is a thing.

[0007]

In order to solve the above problems, the piping unit of the present invention is constructed as follows.
A strainer, a closing valve and a T-shaped pipe are connected to the upstream side of the main valve, and a closing valve and a T-shaped pipe are connected integrally to the downstream side of the main valve in order to connect the branch pipe of the upstream T-shaped pipe and the downstream T-shaped pipe. A bypass unit including a bypass pipe and a bypass valve was connected between the branch pipe and the branch pipe.

In this case, the size of the main valve is different from the sizes of the upstream side closing valve and the downstream side closing valve, the strainer has a joint portion of different diameter, and the strainer is provided between the main valve and the downstream side closing valve. A reducer should be provided, and the strainer should be a U-shaped top lid.
A type strainer is recommended. Further, the strainer, reducer and T-shaped tube are flange type, and when connecting the wafer type valve to either or both of the upstream side and the downstream side, a double screw or a long bolt with a hexagonal head is used. It is preferable to have an outer shape and a face-to-face dimension that allow it to pass through the bolt hole of the flange from the body side. Furthermore, the reducer has a sufficient length with little fluid resistance, and it is preferable that the T-shaped tube is a threaded type in which the branch tube has a diameter smaller than that of the main tube, and the outer circumferential surface of the T-shaped tube is hooked with a fishing band. It should have a non-slip structure.

The bypass unit may be connected to the branch pipe of the upstream T-tube and the branch pipe of the downstream T-tube by using a union joint or a coupler joint, and in the bypass unit, the upstream side and the downstream side of the bypass valve. It is advisable to provide a union joint on either one or both of the sides, and it is advisable to provide an adjusting screw portion capable of adjusting the length in the longitudinal direction of the bypass unit in the middle of the bypass unit.

[0010]

Since the piping unit of the present invention is integrally assembled in the factory, at the construction site, the upstream side piping and the downstream side piping having the pipe joint structure to be connected to the T-shaped pipes at both ends of this piping unit. It suffices to connect the pipes at intervals equal to the length of the pipe unit, and the site construction is extremely easy. Also, the work of mounting the piping unit between the upstream side piping and the downstream side piping is extremely easy.

When it is difficult to install the piping unit with the bypass unit attached due to the situation at the site, etc., a union joint or a coupler in the branch pipe of the T-shaped pipe at both ends of the piping unit. Remove the bypass unit connection with a joint, attach this piping unit with the bypass unit removed, and then connect the bypass unit.The work for removing and installing this bypass unit is to connect the bypass unit with a union joint or coupler. It is extremely easy because a joint is used. Further, since the bypass unit can be easily attached and detached in this manner, it is possible to easily remove and maintain the entire bypass unit at the time of regular repair.

The strainer, reducer, and T-tube are all flange-shaped, and their outer shape and face-to-face dimension connect the wafer type valve to either or both of the upstream side and the downstream side. In this case, it is possible to pass both screws or long bolts with hexagonal heads from these body sides through the bolt holes of the flange.
It is not necessary to use a short pipe even if the wafer type butterfly valve is such that the main valve and the stop valve are generally widely used. Furthermore, since the strainer has a joint with a different diameter, even if a main valve of a size smaller than the size of the front and rear shutoff valves is installed on the downstream side of this strainer to improve adjustability, There is no need to install a reducer between the main valve and the main valve. As described above, in the piping unit of the present invention, the number of short pipes and the reducer between the strainer and the main valve are not required, so that the entire piping unit becomes extremely short and light, and therefore the bypass unit also becomes short and light. Not only this piping unit itself is cheap, the work to install this piping unit is easy and the number of steps is small, the fishing band does not have to be strong, and the insulation can be covered easily and inexpensively. The space for this plumbing unit may be small.

Further, since the union joint is provided on either or both of the upstream side and the downstream side of the bypass valve in the bypass unit, inspection and repair or replacement of the bypass valve is easy. In addition, since the adjustment screw part is provided in the middle of the bypass unit so that the length of the bypass unit in the longitudinal direction can be adjusted, when assembling the piping unit for the first time and when repairing after installing the piping unit. The bypass unit can be installed easily.

Further, since the structure for preventing slipping of the fishing band is provided on the outer peripheral surface of the T-shaped pipe, the work can be safely carried out by using this when the piping unit is attached, and the work efficiency is improved. It should be noted that this non-slip structure is also useful for a fixing sling after mounting. Furthermore, since the strainer is a U-shaped top lid, the floor is hardly soiled when the lid is removed for cleaning.

[0015]

Embodiments of the piping unit of the present invention will be described below with reference to the drawings. 1 is an external view showing one embodiment of a piping unit of the present invention, FIG. 2 is a vertical cross-sectional view in which a part of the piping unit shown in FIG. 1 is omitted, and FIG.
FIG. 6 is a piping diagram showing the piping unit shown in FIG. 1, 2 and 3, 1 is a piping unit, 2 is a bypass unit, 3 is a main valve, 4 is a strainer, 5 and 6 are closing valves, 7 and 8 are T-tubes, 9 is a reducer, 10 is a Reference numeral 11 is a bypass valve, and 11 is a bypass pipe.

A strainer 4 and a shutoff valve 5 are provided upstream of the main valve 3.
And the T-shaped pipe 7, the reducer 9, the stop valve 6 and the T-shaped pipe 8 are connected to the downstream side of the main valve 3, and the branch pipe 7a of the upstream T-shaped pipe 7 is connected.
Between the branch pipe 8a of the downstream T-shaped pipe 8 and the bypass pipe 1
A bypass unit 2 consisting of 1 and a bypass valve 10 is connected. The size of the main valve 3 is smaller than the sizes of the upstream side closing valve 5 and the downstream side closing valve 6, and the strainer 4 has joint portions 4a and 4b having different diameters. A reducer 9 is attached.

The strainer 4 is a U-shaped strainer of the upper lid type as shown in the figure. Further, the strainer 4, reducer 9 and T-shaped pipes 7 and 8 are all flange type, and when connecting the wafer type valve to either or both of the upstream side and the downstream side of these, both screws or It has an outer shape and a face-to-face dimension that allow long bolts of long screws to pass through the bolt holes of the flange from the body side.

In the T-shaped pipes 7 and 8, the main pipes 7b and 8b are flange-shaped, and the branch pipes 7a and 8a are the main pipes 7b and 8.
It is a screw-in type having a diameter smaller than that of b, and is provided with anti-slip structures 7c and 8c of a fishing band on the outer peripheral surface. In addition,
The anti-slip structures 7c and 8c have a knurling structure in the embodiment shown in FIG. 1, but the knurls may have a slanted lattice shape or a horizontal streak shape. Further, like the other embodiment of the T-shaped tube shown in FIG. 4, the T-shaped tube 12 may be provided with a groove 12a into which a fishing band is inserted, and the bottom surface of the groove 12a may be knurled. It should be noted that, in any of the embodiments shown in FIGS. 1 and 4, the anti-slip structures 7c, 8
Although c and 12a are provided at two locations, respectively, they may be provided at only one location.

The bypass unit 2 is connected to the branch pipe 7a of the upstream T-shaped pipe 7 and the branch pipe 8a of the downstream T-shaped pipe 8 by using union joints 13 and 14, and the inside of the bypass unit 2 is connected. Union joints 15 and 16 are provided on the upstream side and the downstream side of the bypass valve 10, and an adjusting screw portion 17 capable of adjusting the length of the bypass unit 2 in the longitudinal direction is provided.

Next, the operation of the embodiment shown in FIGS. 1 to 3 will be described. Since the piping unit 1 is integrally assembled at the factory, at the construction site, the upstream side pipe and the downstream side pipe having the pipe joint structure to be connected to the T-shaped pipes 7 and 8 at both ends of the piping unit 1 are connected. It suffices to perform piping at intervals equal to the length of the piping unit 1, and the site construction is extremely easy. The work of mounting the piping unit 1 between the upstream side piping and the downstream side piping is also extremely easy.

When it is difficult to install the piping unit 1 with the bypass unit 2 attached due to the condition of the site, etc.
Disconnecting the bypass unit 2 by the union joints 13 and 14 connected to the branch pipes 7a and 8a of the character pipes 7 and 8,
This piping unit 1 with the bypass unit 2 removed
It suffices to attach the bypass unit 2 and then connect the bypass unit 2, and the work of connecting the bypass unit 2 is extremely easy because the union joints 13 and 14 are used for connecting the bypass unit 2. Further, since the bypass unit 2 is easily attached and detached in this manner, it is easy to remove the entire bypass unit 2 for maintenance at the time of regular repair.

Strainer 4, reducer 9 and T-tube 7
Both 8 and 8 are flange-shaped, and when their outer shape and face-to-face dimension are connected to either or both of the upstream side and the downstream side of the wafer type valve,
Since both screws or long bolts with hexagonal heads can be passed through the bolt holes of the flange from these body sides, the main valve 3 and shut-off valves 5 and 6 are wafer type butterfly as shown in the figure. Even if it is a valve, it is not necessary to use a short pipe unlike the short pipes 30 to 36 in the conventional example shown in FIG. Further, since the strainer 4 has a joint part with a different diameter, the main valve 3 having a size smaller than the sizes of the front and rear shutoff valves 5 and 6 is mounted on the downstream side of the strainer 4 in order to improve the adjustability. However, it is not necessary to install a reducer between the strainer 4 and the main valve 3.

As described above, in the piping unit 1 of the present invention,
Since the number of short pipes and the reducer between the strainer 4 and the main valve 3 are not required, the entire piping unit 1 is extremely short and light, and thus the bypass unit 2 is also short and light, and the piping unit 1 itself is inexpensive. In addition to this, it is easy to install this piping unit 1 with less man-hours, the fishing band does not have to be strong, and the insulation can be covered easily and at a low cost. The space is small.

Furthermore, in the bypass unit 2, the union joints 15 and 16 are provided upstream and downstream of the bypass valve 10.
Since the above is provided, it is easy to inspect, repair or replace the bypass valve 10. Further, since the adjusting screw portion 17 is provided in the middle of the bypass unit 2 so that the length of the bypass unit 2 in the longitudinal direction can be adjusted, the piping unit 1
The bypass unit 2 can be easily piped at the time of first assembling, and at the time of repair after the pipe unit 1 is attached.

Further, since the non-slip structures 7c and 8c of the fishing band are provided on the outer peripheral surfaces of the T-shaped pipes 7 and 8, the work can be performed safely by using this when installing the piping unit 1. Efficiency is improved. It should be noted that the anti-slip structures 7c and 8c also serve as a fixed sling after being attached. Furthermore, since the strainer 4 is a U-shaped upper lid type, the floor is hardly soiled when the lid is removed for cleaning.

[0026]

The piping unit of the present invention has the following excellent effects. That is, this piping unit
Pre-assembled in a factory convenient for work, yet lightweight and compact, it is extremely easy and easy to work on site, which is generally a high place work, does not require cutting or welding on site, and the number of work steps is low. It is small and economical, does not pollute the site, and requires a small installation space. Furthermore, it is possible to work safely using a fishing band, it can be fixed to a pre-positioned fixing tool, and the bypass unit can be attached and detached as necessary, and the bypass valve can be easily attached and detached. Therefore, not only the initial piping work, but also the subsequent maintenance and repair work is extremely easy.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view in which a part of the piping unit shown in FIG. 1 is omitted.

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

FIG. 4 is an external view showing another embodiment of the T-shaped pipe of the present piping unit.

FIG. 5 is a piping diagram showing an example of conventional piping using graphic symbols.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping unit 2 Bypass unit 3 Main valve 4 Strainer 4a, 4b Joint part 5, 6 Closure valve 7, 8, 12 T-shaped pipe 7a, 8a Branch pipe 7b, 8b Main pipe 7c, 8c Non-slip structure 9 Reducer 10 Bypass valve 11 Bypass piping 13, 14, 15, 16 Union joint 17 Adjustment screw part

Claims (10)

[Claims] 1. A strainer, a shutoff valve and a T-shaped pipe are connected upstream from the main valve, and a shutoff valve and a T-shaped pipe are sequentially connected to the downstream side of the main valve in order to integrally connect the branch pipe and the downstream side of the upstream T-shaped pipe. A piping unit comprising a bypass unit including a bypass pipe and a bypass valve connected between the side T-shaped pipe and a branch pipe. 2. The size of the main valve is different from the sizes of the upstream side closing valve and the downstream side closing valve, and the strainer has a joint portion having a different diameter, and the reducer is provided between the main valve and the downstream side closing valve. The piping unit according to claim 1, wherein the piping unit is provided. 3. The piping unit according to claim 1 or 2, wherein the strainer is a U-shaped strainer of an upper lid type. 4. The strainer is of a flange type, and when a wafer type valve is connected to either or both of the upstream side and the downstream side of the strainer, a double bolt or a long bolt with a hexagonal head is attached to the strainer of the strainer. 4. An outer shape capable of being passed through the bolt hole of the flange from the body side and a surface-to-face dimension.
The listed piping unit. 5. The reducer is a flange type and has a sufficient length to reduce fluid resistance, and a double screw is used when a wafer type valve is connected to either one or both of the upstream side and the downstream side of the reducer. 3. The piping unit according to claim 2, which has an outer shape and a face-to-face dimension that allow a long bolt with a hexagonal head to pass through the bolt hole of the flange from the body side of the reducer. 6. The T-shaped tube has a main tube of a flange type and a branch tube of a threaded type having a diameter smaller than that of the main tube, and a wafer type valve is provided on either or both of an upstream side and a downstream side of the T-shaped tube. A double screw or a long bolt with a hexagonal head has an outer shape and a face-to-face dimension such that a long bolt with a hexagonal head can be passed through the bolt hole of the flange from the body side of the T-shaped tube. The piping unit according to 1 or 2. 7. The piping unit according to claim 1, 2 or 6, wherein the outer peripheral surface of the T-shaped tube is hooked with a hanging band to form a slip band non-slip structure. 8. The bypass unit is connected to the branch pipe of the upstream T-shaped pipe and the branch pipe of the downstream T-shaped pipe by using a union joint or a coupler joint.
The listed piping unit. 9. The piping unit according to claim 1, wherein a union joint is provided on either or both of the upstream side and the downstream side of the bypass valve in the bypass unit. 10. The piping unit according to claim 1, wherein an adjusting screw portion capable of adjusting the length of the bypass unit in the longitudinal direction is provided in the middle of the bypass unit.