JPH07209046A - Electromagnetic flow meter detector - Google Patents

Abstract

PURPOSE:To provide an earthring for an electromagnetic flow meter detector which functions for both the positioning of a gasket and the prevention of falling. CONSTITUTION:A gasket 10 used for fluid seal is attached to an earthring 7 for removing the noise of measured fluid on both the faces in the thickness direction between a piping flanges 3 and the earth ring 7, and between the earth ring 7 and a detector measuring pipe 12. A spot-facing hole is machined on both the faces of the earth ring 7, and the gasket 10 is fast inserted into the spot-facing face of the earth ring 7. The earthring 7, the piping flange 3 and the detector measuring pipe 12 are thereby mechanically aligned, and moreover the gasket 10 is formed in nonfalling structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic flowmeter detector for measuring a special fluid used in food, chemistry, bioplants, etc., and in particular, it is mounted on the upstream side and the downstream side of the detector for grounding a fluid. Related to the structure of the earth ring.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6 and Japanese Utility Model Laid-Open No. 4-49821, the conventional earthing ring structure of an electromagnetic flowmeter detector is smooth on both sides in the thickness direction. There was no positioning of the gasket mounted for fluid sealing between them, and there was no centering or holding function for the gasket.

[0003]

In the earth ring having such a structure, when the electromagnetic flowmeter detector is installed in the process pipe,
There is no positioning of the fluid seal gasket mounted between the process pipe and the earth ring, it is difficult to align the cores, and it is not possible to confirm whether the cores are aligned or not. I was wearing it. In view of the above problems, it is an object of the present invention to provide an electromagnetic flowmeter detector equipped with an earth ring which has a simple structure and facilitates positioning of a gasket and installation of a detector.

[0004]

In order to achieve the above object, a structure is provided in which both sides of an earth ring on which a gasket is mounted are provided with counterbore holes corresponding to the shape of the gasket so that the gasket is brought into close contact with and held by the counterbore part. This makes it possible to easily position the gasket and prevent the gasket from falling off when the electromagnetic flowmeter detector is installed in the process pipe.

[0005]

[Function] By setting the counterbore outer diameter of the earth ring in close contact with the outer diameter of the gasket to be mounted, the outer diameter of the gasket is retained when the earth ring is mounted, and the process pipe and the gasket are retained when the detector is installed. There is no misalignment and the gasket does not fall off.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows an installed state of a sandwiched type electromagnetic flowmeter detector. The electromagnetic flow meter detector 1 is installed so as to be concentric with the pipe axis direction of the process pipe 2 in order to avoid the influence of the flow due to the misalignment of the mating portion with the process pipe 2 and the pipe flange 3 on the upstream and downstream sides. The through bolt 4 is passed through and the nut 5 is tightened and fixed. FIG. 2 is an enlarged and partially cross-sectional view of part A of FIG. An earth ring 7 for removing noise from the fluid to be measured is attached to the detector case 6 with a fixing screw 9 via an earth metal fitting 8 welded to the earth. Between the detector 1 and the earth ring 7, and between the earth ring 7 and the pipe flange 3, a fluid sealing gasket 10 for the fluid to be measured is mounted. As shown in FIG. 3, counterbore holes 11 are formed on both upper and downstream sides of the earth ring 7 so as to hold and fix both the gasket 10 on the detector side and the pipe flange side on the outer peripheral surface, and to process pipes. 2. The detector measuring tube 12 is mounted coaxially with the tube axis and is fastened with the through bolts 4 and nuts 5 to seal the fluid to be measured with the gasket 10.

[0007]

According to the grounding ring structure of the present invention, the gaskets mounted between the electromagnetic flowmeter detector and the grounding ring and between the grounding ring and the piping flange are counterbored holes formed on both sides of the grounding ring. Since it is inserted in the, it is not necessary to align the pipe axis of the process piping with the gasket,
In addition, the outer peripheral surface of the counterbore guides the outer peripheral surface of the gasket so that misalignment does not occur. Conventionally, since the alignment with the process pipe cannot be confirmed from the appearance, it depends largely on the feeling of the operator, but in the present invention, anyone can easily perform accurate work regardless of the level of the operator.

[Brief description of drawings]

FIG. 1 is a diagram showing an installation example of an electromagnetic flow meter detector of the present invention.

FIG. 2 is a sectional view of an enlarged portion of part A in FIG.

FIG. 3 is a sectional view of the earth ring of the present invention.

FIG. 4 is a right side view of FIG.

FIG. 5 is a cross-sectional view of a conventional earth ring.

FIG. 6 is a right side view of FIG.

[Explanation of symbols]

1 ... Electromagnetic flowmeter detector, 2 ... Process piping, 3 ... Piping flange, 4 ... Through bolt, 5 ... Nut, 6 ... Detector case, 7 ... Grounding ring, 8 ... Grounding metal fitting, 9 ... Fixing screw, 10 ... Gasket, 11 ... counterbore hole, 12 ... Detector measuring tube.

Claims (1)

[Claims] 1. A measuring tube for flowing a fluid to be measured, and a magnetic field generator for applying a magnetic field perpendicular to the tube axis direction of the measuring tube,
In the electromagnetic flowmeter detector comprising a pair of electrodes for taking out a signal voltage and a pair of earth rings for fluid grounding on a measuring tube surface which is perpendicular to the direction of the magnetic field and the tube axis direction of the measuring tube, the earth is provided. An electromagnetic flowmeter detector characterized in that a counterbore hole is formed on both sides in the thickness direction of the ring so as to be concentric with the fluid inlet of the earth ring.