JPH07325078A - Device for washing inside of pipe - Google Patents

Abstract

PURPOSE:To accurately and easily eliminate the suspended solid, which is adhered to the inner wall of a pipeline for flowing the fluid to be measured such as the service water to a measuring unit, without generating the secondary problem viewed from the safety aspect by utilizing the fluid to be measured itself. CONSTITUTION:A branch pipe 4 is connected to the upstream side of a measuring unit 2 of a pipeline 1, which flows the fluid W to be measured into the measuring unit 2, through a three-way valve 3, and a siphon device 5 is connected to the branch pipe 4, and the fluid W to be measured, which is taken through the three-way valve 3 and the branch pipe 4, is formed into the pulsating flow so as to be circulated inside of the pipeline 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe for use in a pipe, such as a water quality measuring instrument for tap water, which is installed in a pipe under conditions in which a fluid to be measured always flows into a measuring portion. The present invention relates to a cleaning device.

[0002]

2. Description of the Related Art For example, as in a water quality measuring instrument for tap water,
When water quality is constantly measured under the condition that tap water, which is the fluid to be measured, flows in the pipeline, if the flow rate of the tap water flowing in the pipeline is low, the suspended substances contained in the tap water are Easy to adhere to the inner wall of the road. For this reason, suspended substances adhering to the inner wall of the pipeline are being removed at the time of periodic inspection of the measuring instrument.
Conventionally, generally, means for flowing acid such as hydrochloric acid into the pipeline to wash the inside of the pipeline with acid has been adopted.

[0003]

In the conventional cleaning means as described above, it is possible to easily remove the adhering substance and to obtain a sufficient cleaning effect by performing the acid washing before the time when the suspended substance adheres. Is possible. However, since acid such as hydrochloric acid is used for cleaning, there is a drawback that secondary problems such as safety may occur if care is not taken in acid management. there were.

The present invention has been made in view of the above-mentioned circumstances, and by effectively utilizing the fluid to be measured itself flowing in the pipeline, the fluid adheres to the inner wall of the pipeline without causing a secondary problem. It is an object of the present invention to provide an in-pipe washing device capable of easily and accurately removing the suspended substances and the like.

[0005]

In order to achieve the above object, a pipe cleaning apparatus according to the present invention is a three-way valve interposed on the upstream side of the measuring section in a pipe line through which a fluid to be measured flows into the measuring section. And a branch pipe connected to the pipe through the three-way valve, and a fluid to be measured that is connected to the branch pipe and taken in through the three-way valve when cleaning the inside of the pipe into a pulsating flow and the measurement unit and the three-way It is provided with a siphon device that recirculates to a pipe portion with a valve, and a check valve interposed on the outlet side of the siphon device.

[0006]

According to the present invention, the fluid to be measured is normally flown into the measuring section through the pipe to perform a predetermined measurement such as water quality measurement. When the three-way valve is switched at arbitrary measurement time intervals, the fluid to be measured is taken into the branch pipe side. The fluid to be measured that has been taken in is guided to the siphon device, where it is pulsated, and then is returned to the conduit portion between the measurement unit and the three-way valve. Due to such a pulsating flow of the fluid to be measured, suspended substances and the like adhering to the inner wall of the conduit are peeled off and removed, and the inside of the conduit is cleaned.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a state in which a pipe cleaning apparatus according to an embodiment of the present invention is installed upstream of a water quality measuring instrument for tap water. In FIG. 1, 1 is tap water W as a fluid to be measured.
Is a pipe for flowing the water to the water quality measuring unit 2, and a three-way valve 3 capable of switching from COM to NO and from COM to NC is interposed upstream of the water quality measuring unit 2 in the pipe 1. Reference numeral 4 denotes a branch pipe connected to the pipe line 1 via the three-way valve 3 and takes in the tap water W when the three-way valve 3 is switched from COM to NC.

Reference numeral 5 is a siphon device connected to the branch pipe 4. The siphon device 5 has an atmosphere opening hole 6 at the upper end, and tap water W from the lower end side inlet 7a at the time of cleaning the pipe.
Of the water level H in the tank 7 by connecting the tank 7 into which the water flows in and the outlet 7b on the lower end side of the tank 7.
And a gate-shaped siphon pipe 8 having a height corresponding to the level of H. The siphon pipe 8 exerts a siphon function when the water level H in the tank 7 rises to the upper limit H1, and the water level H Is configured so that the siphon function is lost when the lower limit value H2 falls to the lower limit value H2, and the tap water W is pulsated by repeating the siphon function. The outlet 8a of the siphon pipe 8 is connected to the pipe line portion 1 between the measuring section 2 and the three-way valve 3, and the check valve 9 is interposed in the siphon pipe 8 portion near the outlet 8a.

Next, the operation of the above-configured pipe cleaning device will be described. Normally, turn the three-way valve 3 from COM to N
By setting it to O, the tap water W flows in the pipe 1 and flows into the measuring unit 2, and a predetermined water quality measurement is performed.

Then, when the three-way valve 3 is switched from COM to NC at any time such as at the time of periodic inspection of the measuring unit 2, tap water W flowing in the pipe line 1 flows to the branch pipe 4 side at a flow rate Q1. It is captured. The taken tap water W flows into the tank 7 from the lower end inlet 7a of the tank 7,
The water level H rises.

When the water level H in the tank 7 reaches the upper limit value H1, the siphon function is exerted and the tap water W in the tank 7 is activated.
Flows out through the siphon pipe 8 at a flow rate Q2 and is returned to the pipe line 1 via the check valve 9. Here, since Q2> Q1, the siphon function continues and the tap water W in the tank 7
Continues to flow, and the water level H drops.

When the water level H drops to the lower limit value H2, air is sucked into the siphon pipe 8 from the lower end side outlet 7b in the tank 7, and the siphon function is lost. When the siphon function is lost, tap water W flows into the tank 7 at a flow rate Q1, and the water level H starts rising again. Then, when the water level H rises to the upper limit value H1 again, the tap water W in the tank 7 flows out through the siphon pipe 8 at a flow rate Q2 and is recirculated into the pipe line 1.

By the above-described operation, the tap water W is supplied in a pulsating state into the pipeline 1 through the siphon device 5, and the suspended substance adhering to the inner wall of the pipeline 1 is supplied. Etc. are peeled off and removed. By repeating this,
It is possible to keep the inner wall of the conduit 1 in a constant and clean state.

As described above, tap water W flowing in the pipeline 1
By utilizing, and pulsating and refluxing this,
The inside of the conduit 1 can be easily and accurately cleaned without causing a secondary problem in safety as in the case of acid cleaning.

In the above-described embodiment, the one installed upstream of the water quality measuring device for the tap water W has been described, but it is not limited to tap water and various fluids (liquids) are continuously measured. It can also be arbitrarily applied to cleaning the inside of the pipeline.

[0016]

As described above, according to the present invention, the siphon device is connected to the branch pipe connected to the pipe through which the fluid to be measured flows via the three-way valve, and the siphon device is appropriately incorporated into the siphon device. By pulsating the fluid to be measured and returning it to the pipeline, the pulsating flow of the fluid to be measured can remove suspended substances adhering to the inner wall of the pipeline. Compared with the case of the acid cleaning used, there is an effect that predetermined pipe cleaning can be performed accurately and easily without any secondary problem in terms of safety.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of an entire pipe washing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 Pipeline 2 Measuring part 3 Three-way valve 4 Branch pipe 5 Siphon device 9 Check valve W Fluid to be measured (tap water)

Claims (1)

[Claims] 1. A three-way valve interposed on the upstream side of the measuring section in a pipeline for allowing a fluid to be measured to flow into the measuring section, a branch pipe connected to the pipeline through the three-way valve, and this branch. A siphon device that is connected to a pipe and circulates the fluid to be measured that is taken in through the three-way valve when cleaning the pipe into a pulsating flow and returns to the pipe portion between the measuring unit and the three-way valve, and an intervening device on the outlet side of the siphon device And a check valve provided therein.