JPH0621023Y2 - Site flow with strainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a site flow for observing a flow state of a liquid flowing in a pipe or the like.

[Conventional technology]

Generally, for example, in a boiler system of a thermal power plant, water quality is managed in order to prevent damage due to water in the system.However, in this management, water pollution in the system is caused by cooling water in the condenser. Water quality monitoring inside the condenser is of utmost importance because the seawater is mainly used for this cooling water. Since the inside of the condenser is in a vacuum (under atmospheric pressure), the water quality has been conventionally monitored by collecting sample water at the outlet of the condenser pump.

However, the water quality monitoring should be performed at a required location inside the condenser and at all times, however, in the conventional method, the sample water is collected at the outlet of the condenser. Could not handle the request. Therefore, the present applicants developed a monitoring device as shown in FIG. 4 and made it possible to meet the above demand. The monitoring device will be briefly described below.

The monitoring device includes a sampling unit 10 and a detection unit 12. A plurality of (two in the figure) suction pipes 16 and 16 for sucking the sample water at the required position from the condenser 14 are drawn downward into the sample collecting unit 10, and the suction pipes 16 are sequentially connected to the strainer 20 and the site. It is connected to the mixing tank 24 after incorporating the flow 22 and the like. A canned motor pump 26 is connected to the mixing tank 24, and an air vent pipe 30 is connected via a level switch 28. On the other hand, the detection unit 12 uses the canned motor pump 2
The sample water, which is composed of a flowmeter 34, a detector 36, etc., which are sequentially installed on the sample water supply pipe 32 composed of the discharge pipe 6 and the detection of which is completed, is conducted through the sample water return pipe 38 into the condenser 14. Returned to.

According to the monitoring device having such a configuration, it is confirmed whether or not the sample water at the required location in the condenser 14 has flowed in via the site flow 22 on each of the suction pipes 16 and 16, and then the mixing tank 24. Each of them is introduced into the inside, mixed there, and then sent to the detection unit 12 via the canned motor pump 26, and the water quality is automatically monitored. As described above, according to this monitoring device, it is possible to continuously and continuously monitor the water quality of the required portion inside the condenser. In this case, pump 2
Since 6 is a non-seal pump, air in the boiler system does not enter.

[Problems to be solved by the device]

However, it has been found that the above-described monitoring device has the following problems because the strainer 20 and the site flow 22 incorporated in the sample collecting unit 10 are made of normal products.

That is, the strainer 20 is a Y-shaped strainer in which a cylindrical material is mounted in the casing, and thus it is impossible to constantly monitor the stain and clogging of the material by visual observation. Further, the site flow 22 is constructed in a float type, and in an unstable state, the float is often engaged with the casing or the like to stop the operation, so that the presence or absence of the liquid inflow or the inflow state is checked. Sometimes I could not confirm. Such problems make it difficult to properly collect the sample water and at the same time make maintenance complicated. Furthermore, the combination of strainer and site flow requires a relatively large mounting space.

Therefore, an object of the present invention is to make it possible to always visually check for dirty clogging of the strainer and to always accurately check the presence or absence of the inflow or the inflow state of the liquid, and a site with a strainer that can be configured relatively small and easy to maintain. Intended to provide a flow.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the site flow with a strainer according to the present invention inserts a box body having a side glass in the middle of a piping system for sucking saturated liquid from the upper side to the lower side. A strainer having a predetermined shape defined by punching metal and a wire mesh covering the outer surface as a filtering member to have a predetermined filtration resistance is incorporated to generate bubbles according to the flow rate of the liquid. Is characterized by.

[Action]

The strainer is visible through the sight flow sight glass. Therefore, stains and clogging of the strainer can always be checked. The liquid passing through the excess member of the strainer generates bubbles corresponding to almost the flow rate due to over-resistance, especially when the liquid is a saturated liquid, so the presence or absence of inflow of the liquid and the inflow state can be accurately determined. You can check. Further, since the strainer is incorporated in the site flow, it is smaller and simpler than the conventional combination of the strainer and the site flow. Furthermore, maintenance becomes easier compared with the conventional float type site flow.

〔Example〕

An embodiment of a site flow with a strainer according to the present invention will be described in detail below with reference to the accompanying drawings. Of course, the site flow with a strainer of the present invention is used as a combination of the strainer 20 and the site flow 22 in the sampling unit 10 of the monitoring device shown in FIG.

1 and 2, a site flow 50 with a strainer according to the present invention has a box body 52 inserted in the middle of a pipe 16 for sucking a saturated liquid in a condenser downward.
And a strainer 54 incorporated in the box 52.

The box 52 is a pair of disc-shaped front and rear sight glasses 56, 5
6 and the window 5 where the sight glass 56 is exposed in the center
It is composed of a pair of front and rear frames 58, 58 having 8a, and a body 60 having a pair of openings 60a, 60a to which suction pipes 16a, 16b are connected on both upper and lower side surfaces. The box 52 is the body 6 of the sight glass 56.
Annular notch recess 5 formed in the peripheral portion facing the 0th circumferential end face
After mounting the gasket 62 on the inside of 6a, both frames 58, 58 are inserted through four bolts 64 and nuts 66.
It is assembled in a liquid-tight manner by fastening. Prior to this assembly, the strainer 54 is attached to the end of the upstream suction pipe 16a in advance.

As shown in the enlarged view of FIG. 3, the strainer 54 includes a ring-shaped top plate 72 having a cylindrical sleeve 70 protruding upward, a disc-shaped bottom plate 74, and upper and lower peripheral portions of the top plate 72 and the bottom plate, respectively. And a cylindrical punching metal 76 welded to the peripheral end surface of 74, and this punching metal 76.
Of the wire mesh 78 coated on the outer surface of the. The sleeve 70 has a plurality of slits 70a extending in the axial direction. The sleeve 70 is externally inserted into the suction pipe 16a on the upstream side, and then the sleeve 70 is sucked through a band 80 (see FIG. 1). The strainer 54 is attached to the suction pipe 16a by being fastened to the pipe 16a. Then, as described above, the box body 52 is assembled so as to surround the strainer 54, whereby the site flow with a strainer 50 is completed. The punching metal 76 has a large number of openings 76a having a predetermined diameter arranged at predetermined intervals.

When the site flow 50 with a strainer of the present invention having such a structure is incorporated in place of the strainer 20 and the site flow 22 in FIG. 4, the strainer 54 is visually recognized through the sight glass 56, so that the over member, that is, the wire net 78. The dirt and clogging of the machine are constantly checked and monitored. Further, since the liquid in the condenser passing through the wire net 78 is a saturated liquid, a part of the liquid vaporizes when passing through the opening 76a of the punching metal 76 and corresponds to the flow rate of the liquid when passing through the wire net 78. Generate bubbles. Therefore, by observing the presence or absence of the generation of the bubbles or the generation state,
In addition to the presence or absence of liquid inflow, the inflow state can be accurately confirmed and monitored. In this way, the strainer can be properly maintained, and the sample water at the required location in the condenser can be properly and continuously sampled.
The strainer can be maintained relatively easily by opening the box 52 via the bolt 64 and the nut 66. Further, the site flow with strainer of the present invention has an advantage that it is compact and simple compared to the conventional combination of strainer and site flow.

Although the present invention has been described above with reference to the preferred embodiments, the present invention can be modified in many ways without departing from the spirit thereof. For example, the box body can be configured as a rectangular tube.

[Effect of device]

As described above, in the site flow with a strainer according to the present invention, a box body having a sight glass is inserted in a pipe system for sucking a liquid downward, and a strainer having a predetermined overresistance is provided inside the box body. Since the strainer is incorporated, it is possible to always visually confirm the stain and clogging of the strainer, and it is possible to always accurately and accurately check the presence or absence of the inflow of the liquid or the inflow state of the liquid by the bubbles generated on the upper surface of the strainer. In addition, compared to the conventional combination of a strainer and a site flow, it can be simply and compactly constructed. Further, it has an advantage that maintenance is easy as compared with the conventional float type site flow.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a site flow with a strainer according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a site flow with a strainer shown in FIG. FIG. 4 is a flow sheet showing a conventional monitoring device for controlling the water quality in the condenser. 16a, 16b …… Suction piping 50 …… Site flow with strainer 52 …… Box 54 …… Strainer 56 …… Site glass 56a …… Annular notch recess 58 …… Frame 58a …… Window 60 …… Body 60a …… … Opening 62 …… Gasket 64 …… Bolt 66 …… Nut 70 …… Sleeve 70a …… Slit 72 …… Top plate 74 …… Bottom plate 76 …… Punching metal 76a… Opening 78 …… Wire mesh 80 …… Band

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Claims (1)

[Scope of utility model registration request] 1. A box body having a sight glass is inserted in the middle of a pipe system for sucking a saturated liquid downward from above, and a box metal having a predetermined shape is formed inside the box body to filter the outer surface thereof. A site flow with a strainer, characterized in that a strainer configured to cover a wire mesh as a member to have a predetermined filtration resistance is incorporated to generate bubbles according to the flow rate of the liquid.