JP2005180485A - Piping structure and piping unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure, preventing entering of dust into the device side. <P>SOLUTION: This piping unit 1 is formed of an inflow port 2 opened downward, an outflow port 3 opened upward, and a drain port 4 opened sideways. A drain plug 5 having a filter 6 is screwed in the drain port 4, and the drain port 4 can be opened by removing the drain plug 5. In an outflow port 3 downstream from the filter 6, a second filter 7 composed of a fitting ring 8 and a wire net 9 swollen downward with the peripheral edge thereof fixed to the fitting ring 8, whereby even if the drain plug 5 is detached with the filter 6, entering of dust to the downstream side through the outflow port 3 can be inhibited by the second filter 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a piping structure and a piping unit used on the water supply side to a water heater or the like.

  For example, in a water heater, a water amount sensor composed of an impeller with a magnet is provided in a water supply pipe that supplies water to a heat exchanger so that the amount of water passing through the appliance can be detected. Therefore, a filter is provided on the upstream side of the water amount sensor in the pipe so that foreign matter such as dust does not flow into the water amount sensor side during installation of the water heater. As the structure of this filter, as disclosed in Patent Document 1, there is known a structure in which a plug member provided with a filter is screwed into a drain port provided in the middle of a pipe. The plug member can be removed to clean or replace the filter.

JP 2003-90616 A

  In the above installation work, the plug member is often removed together with the filter, and water is allowed to flow from the upstream side to the drain port to discharge the dust in the pipe. At this time, since water may flow further to the downstream water amount sensor side, dust in the pipe may enter the water amount sensor or the instrument.

  Therefore, an object of the present invention is to provide a piping structure and a piping unit capable of effectively preventing dust from entering the appliance side in the piping provided with such a plug member.

In order to achieve the above object, the invention according to claim 1 is a piping structure characterized in that at least one additional filter is further provided on the downstream side of the filter in the flow path.
In order to achieve the above-mentioned object, the invention according to claim 2 is characterized in that the flow path upstream of the filter and the flow path downstream are connected orthogonally, and the fluid outlet is connected to the upstream flow path. The piping structure is characterized in that a throttle portion formed on the extension line and having an opening area smaller than the fluid outlet is provided in the upstream flow path.
In order to achieve the above-mentioned object, the invention according to claim 3 is a flow channel having an inlet and an outlet, a fluid outlet opening in the middle of the channel, and detachable from the fluid outlet. The piping unit is composed of a plug member having a filter positioned in the flow path in the mounted state and at least one additional filter detachably provided in the flow path on the downstream side of the filter.
In order to achieve the above object, the invention according to claim 4 includes a flow path that has an inlet and an outlet and bends in an orthogonal shape, a fluid outlet that opens on an extension line of the inlet, A piping unit comprising a plug member that can be attached to and removed from the fluid outlet and that has a filter located in the flow path in the mounted state, and a throttle portion having an opening area smaller than the fluid outlet on the upstream side of the filter It is.

According to the present invention, the inflow of dust to the appliance side is effectively prevented, and the reliability of the appliance after installation can be maintained. In particular, in the piping unit, in addition to these effects, since it is unitized as one unit, it is easy to attach to an instrument and attach / detach an additional filter, and the workability during installation work and maintenance is excellent.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< Form 1 >>
FIG. 1 is an explanatory diagram of a piping unit to which the piping structure of the present invention is applied. The piping unit 1 includes an inflow port 2 that opens downward and an outflow port 3 that opens upward in parallel in the vertical direction. A flow path that connects the two is provided in the middle, and a drainage port 4 that opens to the side is formed at a connection portion between the inflow port 2 and the outflow port 3. A drain plug 5 as a plug member is screwed into the drain port 4, and the drain port 4 can be opened by removing the drain plug 5. In addition, a filter 6 positioned in the flow channel in a state of being attached to the water drain port 4 is fixed to the tip of the water drain plug 5 so that entry of dust to the outlet 3 side can be prevented.

  A second filter 7 as an additional filter is mounted in the outlet 3 downstream of the filter 6. The second filter 7 includes a fitting ring 8 and a metal mesh 9 whose peripheral edge is fixed to the fitting ring 8 and bulges downward, and is formed in a fitting groove 10 formed in the outlet 3. In a state where the fitting ring 8 is fitted, a pipe (not shown) is connected to the outflow port 3 to be fixed in the outflow port 3. Therefore, the second filter 7 prevents dust from entering the downstream side of the outlet 3.

  When the piping unit 1 configured as described above is used in, for example, a water heater, the inflow port 2 is connected to the water supply side piping, and the outflow port 3 is connected to the water supply pipe to the water heater. Therefore, when installing the water heater, in order to discharge the dust in the pipe from the water supply side, remove the water tap 5 as shown in FIG. 2 and flow water from the water supply side to the inlet 2 and the water outlet 4. In this case, even if water flows into the outlet 3, the dust is captured by the second filter 7 and does not flow to the hot water heater. Therefore, there is no risk of trouble due to the adhesion of dust to the water amount sensor in the water supply pipe or the entry of dust into the appliance.

  As described above, according to the piping structure of the first aspect, by providing the second filter 7 on the downstream side of the filter 6 in the flow path, the inflow of dust to the appliance side is effectively prevented, and after the installation The reliability of the instrument can be maintained. In particular, by unitizing these as the piping unit 1, it is easy to attach to the appliance and attach / detach the filter, and the workability during installation work and maintenance is excellent.

  In addition, the structure of the second filter is not limited to the above form, and a non-woven fabric or synthetic resin filter can be used in addition to the wire mesh as long as it can pass a fluid such as water and capture dust. Other than the bulging shape, a dish shape, a rod shape, or the like can also be adopted. Further, the number of additional filters is not limited to one, and a plurality of additional filters may be provided.

<< Form 2 >>
On the other hand, the inflow of dust to the appliance side can be prevented without using the additional filter as described above. A piping unit to which this piping structure is applied is shown in FIG. In this piping unit 1a, the flow path is bent so that the inflow port 2 and the outflow port 3 are orthogonal to each other, and a drain port 4 is formed on the extended line of the inflow port 2 at the bent portion to form a water drain plug. 5 is detachable, and a narrowed portion 11 having a smaller area than the openings of the outlet 3 and the drainage 4 is formed in the inlet 2 on the upstream side of the filter 6.

  Also in the piping unit 1a formed in this way, when used for a water heater, the inlet 2 is connected to the water supply side piping and the outlet 3 is connected to the water supply pipe to the water heater. Therefore, when installing the water heater, in order to discharge the dust in the pipe from the water supply side, as shown in FIG. 3 (b), the water drain plug 5 is removed and water is supplied to the inlet 2 and the drain outlet 4. When the water flows, the flow rate of the water passing through the throttle portion 11 increases, so that the water goes straight as it is and is discharged from the drain port 4. Therefore, the inflow of water to the outflow port 3 side is prevented, and there is no risk of dust entering the instrument side.

As described above, according to the piping structure of the second aspect, the inflow port 2 on the upstream side of the filter 6 and the outflow port 3 on the downstream side of the filter 6 are orthogonally connected, and the drainage port 4 is on the extension line of the inflow port 2. In addition, by providing a narrowed portion 11 having an opening area smaller than the drainage port 4 in the inflow port 2, the inflow of dust to the device side is effectively prevented, and the reliability of the device after installation is improved. Can maintain sex. In particular, since these are integrated into a unit as the piping unit 1a, it is easy to attach to the appliance, and the workability during installation work and maintenance is excellent.
In the case of this form 2, an additional filter as in form 1 is provided in the outlet 3 as shown by a two-dot chain line in FIG. Is also possible.

It is explanatory drawing of the piping unit of form 1. It is explanatory drawing of the piping unit which removed the water tap. (A) It is explanatory drawing of the piping unit of the form 2. (B) It is explanatory drawing of the piping unit which removed the water tap.

Explanation of symbols

1, 1a Piping unit, 2 inflow port, 3 outflow port, 4 drainage port, 5 drainage plug, 6 filter, 7 second filter, 8 fitting ring, 9 wire mesh, 10 fitting groove, 11 constriction part.

Claims (4)

A pipe structure in which a fluid outlet is provided in the middle of the flow path, and a plug member provided with a filter located in the flow path in a mounted state is detachably attached to the fluid outlet.
A piping structure, wherein at least one additional filter is provided downstream of the filter in the flow path. A pipe structure in which a fluid outlet is provided in the middle of the flow path, and a plug member provided with a filter located in the flow path in a mounted state is detachably attached to the fluid outlet.
An upstream flow path and a downstream flow path from the filter are orthogonally connected, and the fluid outlet is formed on an extension line of the upstream flow path, and further in the upstream flow path A piping structure characterized in that a throttle portion having an opening area smaller than that of the fluid outlet is provided.   A channel member having an inlet and an outlet, a fluid outlet opening in the middle of the channel, and a plug member detachably attached to the fluid outlet and provided with a filter in the attached state in the attached state And at least one additional filter detachably provided in the flow path on the downstream side of the filter. A flow path that has an inlet and an outlet and bends perpendicularly, a fluid outlet that opens on an extension line of the inlet, and can be attached to and detached from the fluid outlet. A piping unit comprising a plug member provided with a filter located at a position and a throttle portion having an opening area smaller than the fluid outlet on the upstream side of the filter.

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