JPH04124423U - electromagnetic flow meter - Google Patents

Abstract

(57) [Summary] [Purpose] To realize an electromagnetic flowmeter that can measure high-temperature fluids while preventing an increase in the load on the magnetic circuit due to an increase in coil resistance due to heat. [Structure] A pipe body made of ceramics, at least a plurality of cooling holes provided in the pipe body in the axial direction of the pipe body from one end to the other end through which cooling fluid flows, and a plurality of cooling holes in each of the cooling holes. a ring-shaped first pipe that communicates with an opening at one end of the pipe body; a ring-shaped second pipe that communicates with the opening of each cooling hole at the other end of the pipe body; and an outer periphery of the pipe body. This is an electromagnetic flowmeter equipped with an excitation coil provided on the surface.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention prevents an increase in the load on the magnetic circuit due to an increase in coil resistance due to heat. This invention relates to an electromagnetic flowmeter that can measure high-temperature fluids.

0002

[Conventional technology]

FIG. 3 is an explanatory diagram of the main part configuration of a conventional example that has been commonly used. For example, Utility Model Application No. 62-49726, Utility Application No. 60-142322, "Electromagnetic Current "Meter" filed on September 18, 1985.

0003 In the figure, 1 is a cylindrical pipe body made of ceramics. 2 is an electrode arranged on the pipe body 1. 3 is an excitation coil provided on the outer peripheral surface of the pipe body 1. 4 is a shell provided to cover the excitation coil 3. In the above configuration, when the measurement fluid flows inside the pipe body 1, the pipe body 1 Since it is made of ceramic, it is possible to flow high temperature measurement fluid.

0004

[Problem that the idea aims to solve]

However, in such devices, when a high-temperature measurement fluid flows, its heat increases. is transmitted to the excitation coil 3, the coil resistance increases, and the load on the excitation circuit (not shown) increases. increase

[0005] The present invention solves this problem. The purpose of this invention is to prevent an increase in the load on the magnetic circuit due to an increase in coil resistance due to heat. The purpose of the present invention is to provide an electromagnetic flowmeter that can be stopped.

[0006]

[Means to solve the problem] In order to achieve this purpose, the present invention includes a pipe body made of ceramics, provided on the pipe body in the axial direction of the pipe body from one end of the pipe body to the other end; at least a plurality of cooling holes through which cooling fluid flows, and the pipes of the respective cooling holes; A ring-shaped first pipe that communicates with the opening at one end of the main body, and cooling for each of the pipes. a ring-shaped second pipe that communicates with the opening at the other end of the pipe body; An electromagnetic flowmeter includes an excitation coil provided on the outer circumferential surface of the pipe body. It is something that

[0007]

[Effect]

In the above configuration, when high temperature measurement fluid flows inside the pipe body, high temperature measurement Heat is transferred from the constant fluid to the pipe body. However, from one end of the pipe body to the other end, the pipe body At least a plurality of cooling holes are provided in the body and through which cooling fluid flows. , heat transmitted from the high-temperature measurement fluid to the pipe body can be discharged to the outside. Hereinafter, a detailed explanation will be given based on examples.

[0008]

【Example】

FIG. 1 is an explanatory diagram of the main part of an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1.

[0009] In the figure, 11 is a pipe main body extending from one end of the pipe main body 1 to the other end in the axial direction of the pipe main body 1; At least a plurality of cooling holes are provided in the body 1 and through which cooling fluid flows. in this case , six are provided. 12 communicates the opening portion of each cooling hole 11 on one end side of the pipe body 1. This is a ring-shaped first pipe. 13 communicates the opening portion of each cooling hole 11 on the other end side of the pipe body 1. This is a ring-shaped second pipe. 14 is connected to the first pipe 12 and the second pipe 13 and supplies cooling fluid. It is a cooling device. In the above configuration, when the high temperature measurement fluid flows inside the pipe body 1, the high temperature Heat is transferred from the measured fluid to the pipe body 1. However, from one end of the pipe body 1 to the other end, the pipe is moved in the axial direction of the pipe body 1. At least a plurality of cooling holes 11 are provided in the pump body 1 and through which cooling fluid flows. Therefore, the heat transmitted from the high-temperature measurement fluid to the pipe body 1 can be discharged to the outside. can.

0010 As a result, Prevents increase in magnetic circuit load due to increase in coil resistance of excitation coil 5 due to heat I can do it. Therefore, the measurable temperature range can be expanded.

[0011] Note that the cooling fluid may be a gas or a liquid, and in short, it is a fluid that can be cooled. That's fine.

0012

[Effect of the idea]

As explained above, the present invention includes a pipe body made of ceramics and a pipe body made of ceramics. A cooling flow is provided in the pipe body in the axial direction of the pipe body from one end of the pipe body to the other end. at least a plurality of cooling holes through which the body flows; and the pipe body of each cooling hole. A ring-shaped first pipe that communicates with the opening at one end, and the front of each cooling hole. A ring-shaped second pipe that communicates with the opening at the other end of the pipe body, and a pipe main body. An electromagnetic flowmeter including an excitation coil provided on the outer circumferential surface of the body was constructed.

[0013] As a result, Prevents an increase in the load on the magnetic circuit due to an increase in the coil resistance of the excitation coil due to heat. come. Therefore, the measurable temperature range can be expanded.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a diagram illustrating the configuration of a conventional example that has been commonly used.

[Explanation of symbols]

1...Pipe body 2...Electrode 3...Exciting coil 4...Shell 11...Cooling hole 12...First pipe 13...Second pipe 14...Cooling device

Claims (1)

[Scope of utility model registration request] 1. A pipe body made of ceramics, at least a plurality of cooling holes provided in the pipe body in the axial direction of the pipe body from one end to the other end through which cooling fluid flows, and each of the cooling holes. a ring-shaped first pipe that communicates with an opening on one end side of the pipe body; a ring-shaped second pipe that communicates with an opening on the other end of the pipe body of each cooling hole; and a pipe body. An electromagnetic flowmeter comprising an excitation coil provided on the outer circumferential surface of.