JPS5871416A - Detecting device in electromagnetic flowmeter - Google Patents

Abstract

PURPOSE:To perform disassembly and assembly of a pipe and a case simply without cutting a lead wire, by providing a screw hole in the vicinity of a hole in a terminal box, and closely contacting a terminal plate to the surface of an inner wall of the case and attaching it form the inside by an attaching screw. CONSTITUTION:The case 9, which accommodates an exciting coil 7, comprises a cylindrical member. The right side part of the case can be disassembled. The screw hole is provided in the vicinity of the hole of the terminal box 11 at the central part of the case 9. The terminal plate 20 is closely contacted with the inner wall surface of the case 9 and fixed by the attaching screw 24. A conducting metal fitting 13 is connected to an electrode 3 by the lead wire 6. At the time of disassembling, the screw 24 is removed. Then the terminal plate 20 is lowered, a guide pin 18 at the surface of the exciting coil 7 is inserted into a guide hole 21 in the terminal plate 20, and the terminal plate 20 is held on the coil 7. Under this state, the right side part of the case is moved to the right and disassembled. Assembling is performed in the reverse order. Therefore the disassembling and assembling work are performed without fusing the solder to cut the lead wire 6.

Description

[Detailed description of the invention] The present invention relates to an electromagnetic flowmeter detector.

2. Description of the Related Art Conventionally, an electromagnetic flowmeter detector that determines a flow rate based on fluid velocity by generating a magnetic field in a fluid and detecting a current generated in the fluid, which is a conductor, has been constructed as shown in FIG.

In the figure, a pipe 1 through which fluid flows is shown, and both ends of this pipe 1 are provided with linings 2. An excitation coil 7 is arranged in the middle of the pipe 1.1. The magnetic field generated by this excitation coil 7 is generated at least in the fluid.

Further, a case 9 is disposed so as to enclose the excitation coil 7, and the case 9 is made of a cylindrical member that is closed with the pipe 1 protruding from both ends, and is divided into two parts in the axial direction. It has become. One of the two halves of the case 9 is provided with a terminal box 11, and within this terminal box 11, a terminal plate 12 is fixed to the case 9 with mounting screws 15. Note that a gasket 14 is interposed between the case 9 to which the terminal plate 12 is attached and the terminal plate 12. A conductive metal fitting 13 is disposed on the terminal plate 12, and this conductive metal fitting 13 is connected via a lead wire 6 to an electrode 3 for detecting a current flowing between fluids. Note that the terminal box 11 is normally closed by a terminal cover 16. However, in the electromagnetic flow meter detector having such a configuration, when the case 9 is removed from the pipe 1 for maintenance etc., the mounting screws 15 that tighten the terminal plate 12 are removed, and the conductive metal fittings 13 are removed. After disconnecting the conductive metal fitting 13 and the soldered lead wire 6, open the case 9 on the side where the terminal box 11 is provided.
He was lifting it upwards.

For this reason, the conductive metal fitting 13 and the lead wire 6 (these are usually 5
It is not only troublesome to use a soldering iron to remove the lead wires (there are 7 lead wires), but it can also cause breakage, thermal deterioration of the insulating tube containing the lead wires 6, and damage when reconnecting the wires during assembly. There was a fear that incorrect wiring would occur.

An object of the present invention is to provide an electromagnetic flowmeter detector in which a pipe and a case can be assembled and separated by simple work and without damaging parts.

In order to achieve such an object, the present invention provides a pipe through which a fluid flows, an excitation coil disposed on the outer surface of the pipe, a case containing the excitation coil with both ends of the pipe exposed, and a case for enclosing the excitation coil. consisting of a terminal plate on which terminals connected to electrodes for detecting the current generated in the fluid are arranged;
The terminal board is tightly screwed to the inner wall surface of the case, and the terminal surface thereof is exposed through a hole formed in the case.

Hereinafter, the present invention will be explained in detail using Examples.

FIG. 2 is a sectional view showing an embodiment of the electromagnetic flowmeter detector according to the present invention. In the figure, a pipe 1 through which fluid flows
A lining 2 is provided at both ends of the pipe 1. An excitation coil 7 is arranged in the middle of the pipe 1, and a magnetic field generated by the excitation coil 7 is generated at least in the fluid. A case 9 is arranged to enclose the excitation coil 7, and the case 9 is made of a cylindrical member closed with the pipe 1 protruding from both ends. Note that a gasket 5 is placed on the protrusion of the pipe 1 from the case 9 to provide a seal. One end of the case 9 is separable from the other part of the case 90, and these parts are usually screwed together, for example.

Further, a terminal box 1'1 is provided in the middle of the case 9. The bottom of the terminal box 11 is flush with the side surface of the case 9, and is provided with a relatively large hole. A screw hole is provided around this hole, and the terminal plate 20 is fixed to the inner wall surface of the case 9 by a mounting screw 24 inserted into the screw hole. The central surface of the terminal plate 20 is exposed through the hole, and a conductive metal fitting 13 is arranged thereon. This conductive metal fitting 13 is connected via a lead wire 6 to an electrode 3 that detects a current flowing between fluids. Furthermore, the terminal board 2
A plurality of guide holes 21 are provided on the surface of the excitation coil 7 that faces the excitation coil 7, and a guide pin 18 is implanted on the surface of the excitation coil 7 that faces the guide holes 21.

In addition, the terminal box 11 is! It is normally closed by a terminal cover 16.

In this configuration, the removal and assembly of the cover 9 to the knob 1 will be explained below. Insert a screwdriver into the terminal box 11 with the terminal cover 16 removed and remove the mounting screws 24. As a result, the terminal plate 20 separated from the inner wall of the case 9 falls toward the electromagnetic coil 7 2, and at this time, the guide hole 20 formed on the back side of the terminal plate 20
A guide pin 18 is inserted inside. Thereby, the terminal plate 20 is held in a fixed position on the electromagnetic coil 7.

Thereafter, as shown in FIG.
and move it in the axial direction.

When assembling the case 9 and the pipe 1, as shown in FIG. 4, move one end of the case 9 in the axial direction so that it comes into close contact with the other part of the case 90, and after connecting each case, The mounting screw 24 is screwed into the terminal box 11.

As a result, the terminal board 20 whose position is held by the guide pin 18 moves in the direction of the arrow a in the figure as the mounting screw 24 is screwed, detaches from the guide pin 18, and comes into close contact with the inner wall of the case 9. be done.

In this way, if the terminal board 20 is screwed to the inner wall surface of the case 9, the terminal board 20 can be separated from the case 9 by removing the mounting screws 24, and the terminal board 20 and the electrode 3 can be separated from each other by removing the mounting screws 24. There are no obstacles between them when the pipe 1 is moved in the axial direction. For this reason, the pipe 1
can be moved and separated from the case 9 as shown in FIG. Therefore, there is no need for cutting or reconnecting the lead wires connecting the terminal plate and the electrodes by melting the solder as in the past, and the workability is improved.

In addition, if this embodiment is used, the terminal plate 20 which has been unscrewed from the case 9 can be held in position by inserting the guide pin 18 and the guide hole 21 on the excitation coil 7, so it cannot be reused. This has the effect that screwing the terminal board 20 to the case 9 during assembly becomes extremely easy.

As described above, according to the electromagnetic flowmeter detector according to the present invention, it is possible to assemble and separate the pipe and the case with simple work and without damaging the parts.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing an example of a conventional electromagnetic flowmeter detector.
FIG. 2 is a configuration diagram showing one embodiment of the electromagnetic flowmeter detector according to the present invention, and FIGS. 3 and 4 are explanatory diagrams showing combination and disassembly of the electromagnetic flowmeter detector according to the present invention. ■...pipe, 3...electrode, 7...electromagnetic coil,
9...Kake 1 Figure 2 Figure 3 Horror 4-Figure

Claims (1)

[Claims] 1. Connected to a pipe through which a fluid flows, an excitation coil disposed on the outer surface of the pipe, a case containing the excitation coil with both ends of the pipe exposed, and a multiple link for detecting the current generated in the fluid. a terminal board on which the terminals are placed;
An electromagnetic flowmeter detector comprising: the terminal plate being closely screwed to the inner wall surface of the case, and the terminal surface thereof being exposed through a hole formed in the case.