JPH0670637B2 - Flow inspector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow inspector which is attached to a fluid pipe to inspect the state of fluid flow. The flow inspector can be attached to, for example, the outlet side of the steam trap to confirm whether the steam trap normally discharges only the condensate or causes the steam leak.

2. Description of the Related Art An example of a flow inspector is disclosed in JP-A-57-161398. This has a cylindrical transparent body made of tempered glass fixed to the valve casing so that the inside can be seen through, and a valve seat with a valve hole,
A ball valve is arranged on the valve seat so that it can be freely seated on and off. The movement of the ball valve due to the flow of fluid is inspected through a cylindrical transparent body made of tempered glass surrounding the valve.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above, a cylindrical transparent body made of tempered glass is constantly exposed to a flowing fluid in a high-speed and turbulent state and is eroded, so that the wall thickness is reduced, and the glass-made material There has been a problem that the transparent body has to be frequently replaced, or the transparent body is damaged and the fragments and internal fluid are scattered around to cause harm. This is because when the flow inspector is attached to the outlet side of the steam trap, the flowing fluid is high-temperature and high-pressure condensate or steam, and even tempered glass having heat resistance cannot prevent erosion.

Further, in the above-mentioned one, since the cylindrical transparent body is constantly exposed to the fluid, dust, rust, scale, etc. contained in the fluid adheres to lower the transparency and it becomes impossible to inspect the internal flow state. There was also a problem.

Therefore, the technical problem of the present invention is to prevent the transparent body from being constantly exposed to a fluid in a high-speed and turbulent state, to prevent the transparent body from being corroded, and to minimize the adhesion of dust, scale, etc. Another object of the present invention is to provide a flow inspector that can safely and reliably inspect the internal flow state for a long period of time.

MEANS FOR SOLVING THE PROBLEM The technical means of the present invention taken to solve the above technical problem is a transparent member which forms an entrance, an examination room, and an exit in a scope housing, and through which the inside of the examination room can be seen. The ejector member consisting of a nozzle, a suction part, and a diffuser is fixed between the inlet and the outlet, and the suction part of the ejector member and the examination room are communicated with each other and displaced according to the suction force of the ejector member in the examination room. The displacing member is arranged.

By placing an ejector member between the inlet and the outlet so as to communicate with the examination chamber, most of the fluid flowing from the inlet flows down to the outlet without flowing into the examination chamber.

When the high-speed fluid flows down to the ejector member, the static pressure decreases in the suction portion near the nozzle depending on the flow velocity.
In the ejector member between the inlet and outlet of the optoscope, there is a constant differential pressure between the inlet and outlet, and the flow rate is different between when condensate flows down and when steam flows down. Is different. It is possible to inspect from outside the scope whether static water is flowing down inside the scope due to displacement of the displacement member depending on the decrease in static pressure, that is, the difference in suction force. it can.

EFFECT OF THE INVENTION Most of the inflowing fluid flows down directly to the outlet,
The transparent body is not constantly exposed to the fluid in a high-speed and turbulent state, the erosion of the transparent body can be prevented, and the flow state can be inspected for a long period of time without replacing the transparent member. .

Further, since the chances of dust, rust, scale, etc. in the fluid adhering to the transparent member are drastically reduced, the transparency of the transparent member can be maintained for a long period of time, and the flow state can be reliably inspected.

Example An example showing a specific example of the present invention will be described (see FIGS. 1 and 2).

A main body 3 provided with an inlet 1 and an outlet 2, a cylindrical member 5 made of tempered glass that forms an examination chamber 4 inside, and a disk-shaped transparent body 6 made of tempered glass that covers the upper end of the cylindrical member 5. Form the casing of the optoscope. The disc-shaped transparent body 6 is attached by screwing a fixing member 21 with a screw portion 20 provided on the upper portion of the main body 3. The center of the fixing member 21 has a penetrating portion so that the inside can be seen through.
31 is provided. The screw portion 20 is formed integrally with the main body 3 by the foot portion 32 (see FIG. 2). Like the fixing member 21, a penetrating portion 33 is provided in a part of the foot portion 32 so that the inside of the examination room 4 can be seen through.

A nozzle 7 communicating from the inlet 1 to the examination chamber 4 is attached, and a diffuser 8 facing the nozzle 7 and communicating the examination chamber 4 and the outlet 2 is attached to form an ejector member. The space located between the nozzle 7 and the diffuser 8 becomes the suction part 9.

A disc-shaped displacement member 12 having a diameter slightly smaller than the inner diameter of the cylindrical transparent body 5 is accommodated in the examination chamber 4. By disposing the coil spring 13 on the lower surface of the displacement member 12, the displacement member 12 is displaced downward when a suction force is generated by the ejector member, and the displacement member 12 is returned to its original position when the suction force is not generated. Distribute to.

A viewing window 22 made of tempered glass is attached to the displacement member 12 through a retaining ring 23 at approximately the center so that the inside of the examination room 4 can be directly seen through. Further, a slide ring 24 is attached to the outer periphery of the displacement member 12 so that the displacement member 12 can be easily displaced. Reference numeral 25 is a communication hole that communicates the upper and lower spaces of the displacement member 12, and reference numerals 27, 28, 29, 30 are gaskets.

The fluid flowing from the inlet 1 is throttled by the nozzle 7 to increase its flow velocity, and most of it reaches the diffuser 8 and reaches the outlet 2. Therefore, the fluid hardly flows into the examination room 4 and the transparent member made of tempered glass is not corroded. Further, whether the fluid flowing down the ophthalmoscope is condensate or steam can be visually inspected from the outside depending on the degree of displacement of the displacement member 12 due to the difference in suction force generated in the ejector portion.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the flow inspector of the present invention, FIG.
The figure is a left side view in FIG. 1: Inlet, 2: Outlet 3: Main body, 4: Examination room 5: Cylindrical transparent body, 6: Disc transparent body 7: Nozzle, 8: Diffuser 9: Suction part, 12: Displacement member

Claims (1)

[Claims] Claim: What is claimed is: 1. An inlet, an inspection chamber and an outlet are formed in a casing of an inspecting device, a transparent member for seeing through the inside of the inspection chamber is fixed, and an ejector member comprising a nozzle, a suction portion and a diffuser is provided between the inlet and the outlet. A flow inspector, in which a suction member of the ejector member is connected to the examination chamber, and a displacement member that is displaced in accordance with the suction force of the ejector member is disposed in the examination chamber.