JP2004251758A - Transducer of electromagnetic flowmeter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and inexpensive converter of an electromagnetic flowmeter with explosion-proof specifications by providing a pressure-resistant wall for separating an amplification chamber from a terminal chamber and setting the terminal chamber to be an explosion-proof structure with increased safety. <P>SOLUTION: The converter of an electromagnetic flowmeter to be externally wired from a front display, and front comprises: a partition wall, where one end is connected to the bottom surface of the terminal chamber opposite to a wiring through hole; a step section provided at the other end side of the partition wall and the sidewall of the terminal chamber 22; a base plate arranged while one surface is in contact with the step section; a groove that comprises the peripheral end of the base plate, the partition wall, the sidewall of the terminal chamber 22, and the step section and has a specific width, and a specific depth; a first resin filler filled into the groove; a terminal block mounted to the base plate; the terminal through hole that is provided on the base plate, where a conductive plate in the terminal block penetrates; and a second resin filler filled into the terminal through hole. The converter comprises a pressure-resistant explosion-proof partition wall to the wiring through hole by the partition wall, first resin filler, base plate, terminal in the terminal block, and second resin filler. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof electromagnetic flowmeter converter that can be reduced in size and inexpensive.
[0002]
[Prior art]
FIG. 11 is a configuration explanatory view of a conventional example generally used in the related art, for example, shown in a product introduction “Smart electromagnetic flowmeter MagneW3000 FLEX” (for example, see Patent Document 1).
12 is a side view of FIG. 11, FIG. 13 is a view of the terminal chamber of FIG. 11 with a lid removed, and FIG. 14 is a cross-sectional view taken along line AA of FIG.
[0003]
In the figure, a case 1 has a display-type amplifier room 2 and a terminal block 3 in which a terminal block 3 is arranged parallel to the front surface, and a terminal room 4 that can be externally wired from the front surface is used for wiring the terminal block 3 to the amplifier room 2. This is an integrated case that is communicated by the wiring through holes 5.
[0004]
[Non-patent document 1]
Product introduction "Smart electromagnetic flowmeter MagneW3000 FLEX", [online], [Searched October 21, 2002], Internet, <Yamatake homepage / Industrial Automation / Smart electromagnetic flowmeter MagneW3000FLEX,
URL: http: // www. yamatake. co. jp / japan / 03produc / ia / fic / fic_03. htm>
[0005]
[Problems to be solved by the invention]
The converter of the electromagnetic flow meter, which has a front display type amplifier room and a terminal room that can be externally wired from the front, has a panel and terminal block on the front, so it is necessary to set from the front and connect cables. Can be used and convenient to use.
[0006]
However, in such a device, the following problem occurs when a pressure-resistant structure is used.
(1) The amplifier chamber 2 requires a pressure-resistant explosion-proof structure due to its properties. However, in the case of a square case, it is necessary to secure a joint surface, so that the entire case becomes large.
For example, the area viewed from the front is about 1.3 times.
[0007]
This is because the joint surface between the case and the cover of the amplifier chamber 2 must be secured in a plane parallel to the plane of FIG.
Thus, by adopting a round cross-section amplifier room and adopting a screw fitting portion, it is possible to prevent the case from becoming large.
[0008]
On the other hand, when the terminal room 4 also has a pressure-resistant explosion-proof structure, it becomes large similarly to the above.
Even if the terminal chamber 4 having a round cross section is employed, the terminal block 3 is square, so that the size of the terminal chamber 3 is rather large.
[0009]
Also,. When the terminal room 4 has an explosion-proof construction, a special cable fitting for explosion-proof construction is required, and the cost is increased.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an inexpensive explosion-proof electromagnetic flowmeter converter that can be reduced in size.
That is, by providing a pressure-resistant wall separating the amplifier chamber and the terminal chamber, and by providing the terminal chamber with an explosion-proof construction with increased safety, a downsized and inexpensive explosion-proof electromagnetic flowmeter converter is provided.
[0011]
[Means for Solving the Problems]
In order to achieve such an object, according to the present invention, in the converter of the electromagnetic flow meter according to claim 1,
An integrated type in which a front display type amplifier room and a terminal block arranged in parallel with the front surface and a terminal room capable of external wiring from the front surface are connected by a wiring through hole for wiring the terminal block to the amplifier room. In a converter of an electromagnetic flow meter having a case,
A partition having one end connected to the bottom surface of the terminal chamber facing the wiring through hole, a step provided on the other end side of the partition and a side wall of the terminal chamber, and one of the steps provided on the step. A groove having a predetermined width and a predetermined depth formed by a base plate having a surface in contact therewith, a peripheral edge of the base plate, the partition wall, a side wall of the terminal chamber, and the step portion; A first resin filler, a terminal block attached to the base plate, a terminal through-hole provided in the base plate and penetrating the conductive plate of the terminal block, and a second terminal filled in the terminal through-hole. And a resin filler,
The partition wall, the first resin filler, the base plate, the conductive plate of the terminal block, and the second resin filler constitute a pressure-resistant explosion-proof partition against the wiring through-hole.
[0012]
According to claim 2 of the present invention, in the converter of the electromagnetic flow meter according to claim 1,
An integrated type in which a front display type amplifier room and a terminal block arranged in parallel with the front surface and a terminal room capable of external wiring from the front surface are connected by a wiring through hole for wiring the terminal block to the amplifier room. In a converter of an electromagnetic flow meter having a case,
A partition having one end connected to the bottom surface of the terminal chamber facing the wiring through hole, a step provided on the other end side of the partition and a side wall of the terminal chamber, and one of the steps provided on the step. A groove having a predetermined width and a predetermined depth formed by a base plate having a surface in contact therewith, a peripheral edge of the base plate, the partition wall, a side wall of the terminal chamber, and the step portion; A first resin filler, a safety-enhanced explosion-proof terminal block attached to the base plate, and meeting a safety-enhanced explosion-proof standard; a terminal through hole provided in the base plate and through which a terminal of the safety-enhanced explosion-proof terminal block passes; A second resin filler filled in the terminal through-hole,
An explosion-proof partition against the wiring through hole is constituted by the partition, the first resin filler, the base plate, the terminals of the safety-enhanced explosion-proof terminal block, and the second resin filler.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view 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 view of a terminal chamber of FIG. 1 with a cover removed, and FIG. FIG. 5 is a cross-sectional view taken along line CC of FIG. 3, and FIG. 6 is an enlarged view of a main part of FIG.
[0014]
In the figure, reference numeral 11 denotes a partition wall having one end connected to the bottom surface of the terminal chamber 22 so as to face the wiring through hole 5.
Reference numeral 12 denotes a step provided on the other end of the partition 11 and the side wall of the terminal chamber 22.
[0015]
Reference numeral 13 denotes a base plate arranged on one side of the step 12.
Reference numeral 14 denotes a groove having a predetermined width and a predetermined depth formed by the peripheral edge of the base plate 13, the partition 11, the side wall of the terminal chamber 22, and the step 12.
Reference numeral 15 denotes a first resin filler to be filled in the groove 14.
[0016]
Reference numeral 16 denotes a terminal block attached to the base plate 13.
Reference numeral 17 denotes a terminal through hole provided in the base plate 13 and through which the conductive plate of the terminal block 16 passes.
Reference numeral 18 denotes a second resin filler that fills the terminal through hole 17.
[0017]
In the above configuration,
The terminal block 16 is attached to the base plate 13.
The conductive plate of the terminal block 16 is passed through the terminal through hole 17.
The terminal through hole 17 is filled with a second resin filler 18.
The base plate 13 is arranged on the step portion 12.
The first resin filling body 15 is filled in the groove 14.
The terminal through hole 17 is filled with a second resin filler 18.
[0018]
The partition 11, the first resin filler 15, the base plate 13, the conductive plate of the terminal block 16, and the second resin filler 18 constitute a pressure-resistant explosion-proof partition against the wiring through-hole 5.
[0019]
As a result, the two explosion-proof chambers can be separated from each other, so that the two chambers of the amplifier chamber 21 and the terminal chamber 22 can have independent explosion-proof structures.
At this time, the amplifier room 21 has a round cross section, and employs a pressure-resistant explosion-proof having a screw fitting portion, which is screwed by turning the cover.
[0020]
As a result,
(1) Since the two chambers of the amplifier room 21 and the terminal room 22 can be formed as independent explosion-proof structures, the amplifier room 21 and the terminal room 22 can be separated from each other. Alternatively, direct retraction can be employed.
In the case of an explosion-proof structure with increased safety, a metal fitting that realizes the waterproof standard IP54 can be used instead of a pressure-resistant explosion-proof fitting.
[0021]
(2) Since the two chambers of the amplifier chamber 21 and the terminal chamber 22 can be formed as independent explosion-proof structures, a two-chamber airtight and watertight structure can be realized.
In this case, it is possible to prevent the amplifier from being damaged at the time of piping work and to prevent water from entering the inside of the amplifier chamber 21.
[0022]
Generally, there is a case where the terminal chamber 22 is required to be open for a long time at the time of wiring, but a converter of the electromagnetic flow meter which can easily perform such a state is obtained.
[0023]
7 is an explanatory view of a main part of another embodiment of the present invention, FIG. 8 is a cross-sectional view taken along the line DD in FIG. 7, FIG. 9 is a cross-sectional view taken along the line EE in FIG. 7, and FIG. FIG.
In the drawing, reference numeral 31 denotes a terminal block for safety explosion protection that is attached to the base plate 13 and satisfies the safety explosion protection standard.
[0024]
Reference numeral 32 denotes a terminal through hole provided on the base plate 13 and through which a terminal of the terminal block 31 for safety and explosion protection passes.
Reference numeral 33 denotes a second resin filler that fills the terminal through hole 32.
[0025]
In the above configuration, the partition 11, the first resin filler 15, the base plate 13, the conductive plate of the terminal block 31, and the second resin filler 33 constitute a pressure-resistant explosion-proof partition against the wiring through-hole 5.
[0026]
As a result, it is possible to separate into two chambers on the explosion proof, so that the amplifier chamber 41 has a pressure-resistant explosion-proof structure and the terminal chamber 42 can have a safety-enhanced explosion-proof structure.
At this time, the amplifier chamber 41 has a round cross-section, and employs a screw fitting joint surface where the cover is turned and screwed.
[0027]
As a result,
(1) Since the terminal chamber 22 can have a safety-enhanced explosion-proof structure, it can be made into a small case, and as a whole, an electromagnetic flowmeter converter that can be downsized can be obtained.
[0028]
(2) Since the terminal room 22 can be made to have a safety-enhanced explosion-proof structure, it is not necessary to use a dedicated cable wiring fitting of a pressure-resistant explosion-proof structure, so that cost and wiring work can be simplified. And an inexpensive explosion-proof electromagnetic flowmeter converter can be obtained.
[0029]
It should be noted that the foregoing description has been directed to specific preferred embodiments for the purpose of explanation and illustration of the present invention. Therefore, the present invention is not limited to the above-described embodiment, but includes many more changes and modifications without departing from the spirit thereof.
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, the following effects can be obtained.
[0031]
As a result,
(1) Since the two chambers of the amplifier room and the terminal room can have independent explosion-proof structures, the amplifier room and the terminal room can be separated from each other. Can be adopted.
In the case of an explosion-proof structure with increased safety, a metal fitting that realizes the waterproof standard IP54 can be used instead of a pressure-resistant explosion-proof fitting.
[0032]
(2) Since the two chambers of the amplifier chamber and the terminal chamber can be formed as independent explosion-proof structures, a two-chamber structure that is airtight and watertight can also be realized.
In this case, it is possible to prevent the amplifier from being damaged at the time of piping work or to be flooded inside the amplifier chamber.
[0033]
In general, there is a case where it is desired to open the terminal chamber for a long time at the time of wiring. However, a converter of the electromagnetic flow meter which can easily perform such a state is obtained.
[0034]
According to the second aspect of the present invention, the following effects are obtained.
(1) Since the terminal room can be made to have an explosion-proof structure with increased safety, a small case can be formed, and a converter for an electromagnetic flowmeter that can be downsized as a whole can be obtained.
[0035]
(2) Since the terminal room can be made to have a safety-enhanced explosion-proof structure, there is no need for a dedicated cable wiring fitting with a flame-proof structure, so that cost and wiring work can be simplified, and the case where the terminal room is normally used is used. A low-cost explosion-proof electromagnetic flowmeter converter can be obtained.
[0036]
Therefore, according to the present invention, a downsized and inexpensive explosion-proof electromagnetic flowmeter converter can be realized.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a main configuration of an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a view of the terminal chamber of FIG. 1 with a lid removed.
FIG. 4 is a sectional view taken along line BB of FIG. 3;
FIG. 5 is a sectional view taken along line CC of FIG. 3;
FIG. 6 is an enlarged view of a main part of FIG. 3;
FIG. 7 is an explanatory diagram of a main part configuration of another embodiment of the present invention.
8 is a sectional view taken along the line DD of FIG. 7;
FIG. 9 is a sectional view taken along the line EE of FIG. 7;
FIG. 10 is an enlarged view of a main part of FIG. 7;
FIG. 11 is an explanatory view of a configuration of a main part of a conventional example generally used in the related art.
FIG. 12 is a side view of FIG. 10;
FIG. 13 is a view of the terminal chamber of FIG. 10 with a lid removed.
FIG. 14 is a sectional view taken along line AA of FIG.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Case 2 Amplifier room 3 Terminal block 4 Terminal room 5 Wiring through hole 11 Partition wall 12 Step 13 Base plate 14 Groove 15 First resin filler 16 Terminal block 161 Conductive plate 17 Terminal through hole 18 Second resin filler 21 Amplifier room 22 Terminal room 31 Safety-enhancing explosion-proof terminal block 32 Terminal through hole 33 Second resin filling 41 Amplifier room 42 Terminal room

Claims (2)

An integrated type in which a front display type amplifier room and a terminal block arranged in parallel with the front surface and a terminal room capable of external wiring from the front surface are connected by a wiring through hole for wiring the terminal block to the amplifier room. In a converter of an electromagnetic flow meter having a case,
A partition wall having one end connected to the bottom surface of the terminal chamber facing the wiring through hole;
A step provided on the other end side of the partition and the side wall of the terminal chamber;
A base plate with one surface in contact with this step,
A groove having a predetermined width and a predetermined depth formed by a peripheral edge of the base plate, the partition wall, a side wall of the terminal chamber, and the step portion;
A first resin-filled body filled in the groove;
A terminal block attached to the base plate,
A terminal through hole provided in the base plate and through which the terminal of the terminal block passes;
A second resin filler filled in the terminal through-hole,
An electromagnetic flowmeter, wherein a pressure-resistant explosion-proof partition against the wiring through hole is constituted by the partition, the first resin filler, the base plate, the conductive plate of the terminal block, and the second resin filler. Converter. An integrated type in which a front display type amplifier room and a terminal block arranged in parallel with the front surface and a terminal room capable of external wiring from the front surface are connected by a wiring through hole for wiring the terminal block to the amplifier room. In a converter of an electromagnetic flow meter having a case,
A partition wall having one end connected to the bottom surface of the terminal chamber facing the wiring through hole;
A step provided on the other end side of the partition and the side wall of the terminal chamber;
A base plate with one surface in contact with this step,
A groove having a predetermined width and a predetermined depth formed by a peripheral edge of the base plate, the partition wall, a side wall of the terminal chamber, and the step portion;
A first resin-filled body filled in the groove;
A safety-enhanced explosion-proof terminal block attached to the base plate and meeting the safety-enhanced explosion-proof standard,
A terminal through hole provided in the base plate and through which the terminal of the safety-enhanced explosion-proof terminal block passes;
A second resin filler filled in the terminal through-hole,
An explosion-proof partition against the wiring through hole is constituted by the partition, the first resin filler, the base plate, the conductive plate of the safety-enhanced explosion-proof terminal block, and the second resin filler. Electromagnetic flowmeter transducer.

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