JPH085489A - Measuring device - Google Patents

Abstract

PURPOSE:To secure pressure resistance and explosion proof and besides, make possible downsizing by attaching an indicator case to an amplifier case, in close vicinity to an amplifier part, and taking in wiring directly from the amplifier part. CONSTITUTION:An indicator case 11 is attached to an amplifier case 2, in close vicinity to an amplifier part 4, and wiring 12 is taken in directly from the amplifier part 4, and also it constitutes a pressure-resistant explosion-proof chamber together with the amplifier part 4 of the amplifier case 2. Moreover, explosion-proof space is made between a terminal board 5 and the amplifier case 2, and by this explosion-proof space, the pressure resistance and explosion proof of the amplifier part 4 are secured. Hereby, the case 11 is attached to the amplifier case 2, in close vicinity to the amplifier part 4, and the wiring 12 from the amplifier case 4 is taken in directly, so there is no necessity to increase the number of terminals, and it is not subjected to the restriction of the limit of the space of the terminal board 4, and the downsizing becomes easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device which can secure pressure and explosion proof at low cost, can be miniaturized, and can easily adopt a digital indicator.

[0002]

2. Description of the Related Art FIG. 2 is a structural explanatory view of a conventional example that has been generally used, for example, an instruction manual "Electronic differential pressure transmitter (JTD920 type)" issued by Yamatake Honeywell Co., Ltd. September 1992. Shown in the issue.

In the figure, 1 is a differential pressure detecting portion, 2 is an amplifier case attached to the differential pressure detecting portion 1, and 3 is an indicator case. The amplifier section 4 is arranged at the bottom of the amplifier case 2,
The terminal plate portion 5 is arranged on the lid side of the amplifier case 2.

The indicator case 3 is attached to the amplifier case 2 in the vicinity of the terminal plate portion 5 and is connected to the wiring 6 from the terminal plate portion 5.
And the amplifier case 2 and the explosion-proof chamber. In the above configuration, the indicator case 3 is attached to the amplifier case 2 in the vicinity of the terminal plate portion 5, takes in the wiring 6 from the terminal plate portion 5, and constitutes the amplifier case 2 and the explosion-proof chamber.

[0005]

However, in such a device, the indicator case 3 is attached to the amplifier case 2 in the vicinity of the terminal plate portion 5 and the wiring 6 from the terminal plate portion 5 is taken in. Therefore, many wiring 6 to the indicator case 3
However, the space of the terminal plate portion 5 is limited, and it is not easy to increase the number of terminals, and the terminal plate portion 5 is inevitably large, which is an obstacle to miniaturization.

Even if a digital indicator capable of indicating various kinds of information is adopted rather than an analog indicator, there is a limit in increasing the number of wires due to the restriction of the number of terminals, and a digital indicator requiring a large number of wires is required. It was difficult to adopt an indicator. Further, since the amplifier section 4, the terminal board section 5, and the indicator case 3 must all have a pressure-proof and explosion-proof structure, the manufacturing cost becomes high. The present invention solves this problem.

An object of the present invention is to provide a measuring device which can ensure pressure-proof and explosion-proof at low cost, can be miniaturized, and can easily adopt a digital indicator.

[0008]

In order to achieve this object, the present invention provides a measuring device in which an amplifier section is arranged on the bottom of an amplifier case and a terminal plate section is arranged on the lid side of the amplifier case. Which is attached to the amplifier case in the vicinity of the section and directly takes in the wiring from the amplifier section, and further comprises an indicator case which forms a pressure-proof explosion-proof chamber with the amplifier section of the amplifier case. Is.

[0009]

In the above construction, the indicator case is attached to the amplifier case in the vicinity of the amplifier part, and the wiring is directly taken in from the amplifier part, and at the same time, the amplifier part of the amplifier case and the explosion-proof chamber are formed. Hereinafter, detailed description will be given based on examples.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of the essential structure of an embodiment of the present invention. In the figure, the same symbols as those in FIG. 2 represent the same functions. Only parts different from FIG. 2 will be described below.

Reference numeral 11 is an indicator which is attached to the amplifier case 2 in the vicinity of the amplifier section 4 to take in the wiring 12 directly from the amplifier section 4 and which constitutes a flameproof explosion-proof chamber with the amplifier section 4 part of the amplifier case 2. It is a case. Reference numeral 13 is an explosion-proof gap provided between the terminal plate portion 5 and the amplifier case 2. The explosion-proof gap 13 ensures pressure-proof explosion-proof of the amplifier section 4.

In the above structure, the indicator case 3 is
It is attached to the amplifier case 2 in the vicinity of the amplifier section 4, takes in the wiring 12 from the amplifier section 4, and constitutes an explosion-proof chamber with the amplifier section of the amplifier case 2.

As a result, (1) the indicator case 11 is attached to the amplifier case 2 in the vicinity of the amplifier unit 4 and directly takes in the wiring 12 from the amplifier unit 4, so that it is not necessary to increase the number of terminals. Therefore, the size of the terminal plate portion 5 is not limited and the size can be easily reduced. Becomes an obstacle to.

(2) Since the indicator case 11 directly takes in the wiring 12 from the amplifier section 4, the number of wirings can be easily increased and a digital indicator can be easily adopted. (3) Since only the amplifier section 4 and the indicator case 11 need to have a pressure-proof explosion-proof structure, downsizing can be facilitated and manufacturing cost can be reduced.

Although the amplifier case 2 has been described as being attached to the differential pressure detecting section 1 in the above-mentioned embodiment,
The present invention is not limited to this, and may be attached to, for example, an electromagnetic flowmeter main body, a vortex flowmeter main body or a mass flowmeter main body,
Alternatively, it may be an independent one that is not attached to the differential pressure detector 1 or the like. In short, any amplifier case will do.

[0016]

As described above, according to the present invention, in the measuring device in which the amplifier section is arranged on the bottom of the amplifier case and the terminal plate section is arranged on the lid side of the amplifier case, the measuring apparatus is provided close to the amplifier section. A measuring device is provided, which is attached to the amplifier case and directly takes in the wiring from the amplifier part, and further comprises an indicator case forming an explosion-proof chamber with the amplifier part of the amplifier case.

As a result, (1) the indicator case is attached to the amplifier case in the vicinity of the amplifier section and directly takes in the wiring from the amplifier section. Therefore, it is not necessary to increase the number of terminals, and the terminal board section It is easy to miniaturize without being restricted by space limitations. Becomes an obstacle to.

(2) Since the indicator case directly takes in the wiring from the amplifier section, the number of wirings can be easily increased and a digital indicator can be easily adopted. (3) Since the amplifier section and the indicator case may have a pressure-proof explosion-proof structure, the size can be easily reduced and the manufacturing cost can be reduced.

Therefore, according to the present invention, it is possible to obtain the measuring device which can secure the pressure and explosion proof at a low cost, can be downsized, and can easily adopt the digital indicator.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram of a configuration of a conventional example that is generally used in the past.

[Explanation of symbols]

 1 ... Differential pressure detection unit 2 ... Amplifier case 4 ... Amplifier unit 5 ... Terminal plate unit 11 ... Indicator case 12 ... Wiring

Claims (1)

[Claims] 1. A measuring device in which an amplifier section is arranged on the bottom of an amplifier case and a terminal plate section is arranged on the lid side of the amplifier case, wherein the amplifier unit is attached to the amplifier case in the vicinity of the amplifier section and is directly wired from the amplifier section. A measuring device, which is equipped with an indicator case that forms a pressure-resistant and explosion-proof chamber with the amplifier part of the amplifier case.