JPS5850294Y2 - Heat flow sensor - Applicable equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device in which a flexible plate-shaped sensor, which is the detection part of a heat flowmeter, is applied to a measurement surface.

A heat flow meter is a device that measures the flow rate of heat based on the temperature difference between both ends of the object when the heat flow passes through an object with known heat conductivity.・A heat flow sensor is connected to the instrument body with an indicator with an electric wire. Be prepared.

In order to increase sensitivity, the sensor includes an internal element that includes a thermocouple group consisting of a large number of differential thermocouples and a heat-resistant plate.

The outer shape of this sensor is, for example, a 50 mm x 100 mm rectangle, like a rubber plate with a thickness of 8 studs, and a lead wire is connected to one end of the rubber plate.

Figure 1 shows an example of a sensor for measuring heat flow.

The outer covering material is made of heat-resistant rubber, and a portion E surrounded by a dotted line is an internal element enclosing portion.

The screws 2 fixed at the four corners of the sensor 1 are for attaching the sensor to the sensor application device of this invention, if necessary, and the numeral 3 is a lead wire.

When applying such a sensor to a measurement surface and examining the heat flow in that area, reliability will be lowered if changes occur in the thermal environment accompanied by thermal disturbances.

Therefore, conventionally, the main methods of applying heat flow sensors to the measurement surface are adhesive tapes and sheets, and adapters with magnets are also used only when the measurement surface is made of steel.

However, the adhesive sheet was troublesome to remove, it was even more troublesome to remove the adhesive left on the measuring surface, and there were problems with uniform contact between the sensor and the measuring surface.

Furthermore, the use of magnets is completely useless against non-ferrous materials such as heat insulating materials.

This idea overcomes the above situation and develops a practical device that more easily and reliably applies heat flow sensors to measurement surfaces.

A detailed explanation of this invention will be given below with reference to the illustrated embodiments.

Two embodiments are shown in FIGS. 2 and 3, and the former is used by attaching the sensor 1 to the elastic pressurizing member 4 at the tip of the device of this invention using the set screw 2 illustrated in FIG. 1. , the latter is used without combining the sensor and pressurizing material.

Each device is composed of a bar handle 5 and an elastic pressure member 4 attached to its tip.

The elastic pressurizing material 4 has a structure in which when it is pressed against the back surface of the sensor 1 with a handle 5, it elastically presses the position away from the internal element of the sensor 1 to bring the element enclosing portion E into uniform contact with the measurement surface. There must be.

If the internal element enclosure is pressurized, there is a risk of damaging the thermocouple and the like, and there is also a large risk of causing the aforementioned heat flow disturbance effect.

The part removed from the enclosure E, in the illustrated example, the sensor 1
If both opposing outer edges of the sensor 1 are pressed against the measurement surface, the element enclosing portion E will come into uniform contact with the measurement surface, since the sensor 1 is as rigid as a rubber plate even though it is flexible.

If the dimensions of the sensor 1 are large and it is insufficient to apply pressure only to the opposing edges, it is necessary to take measures such as applying pressure to the entire periphery, but normally the sensor is not made that large.

The structure of the embodiment shown in FIGS. 2 and 3 has a base plate 6 at the tip of the handle 5, and the elastic pressure member 4 is supported by left and right supports (tubes) 7 attached parallel to both sides of the base plate 6. A tightening screw 9 fixes the ends of the wire rod 8 slidably supported on the support member 7, and the front and rear U-shaped elastic wire rods 8 (in this case, stainless steel wire ) etc.

The bottom portion of the U-shape of the U-shaped elastic wire 8 presses flat near both ends of the target sensor 1, and the leg portions of the wire 8 are elastically curved by the axial pressure of the handle 5.

Particularly, in the one shown in FIG. 2, the fasteners (set screws) 2 at a plurality of locations on the back surface of the sensor 1 and the U-shaped wire rod 8 of the elastic pressurizing material 4 are made detachable as described above.

That is, the bottom part of the U-shape of the wire 8 has a convex shape, as shown in FIG. I try to press .

The set screw 2 on the back side of the sensor 1 is a female thread, and the claw 10 is clamped and fixed by the male thread 2a.

The claw 10 is only used to fasten the sensor 1, and pressure is applied by a portion 8a of the wire 8 protruding between the two claws 10.

It is desirable to attach the set screw 2 to the sensor 1 so that the back surface of the set screw 2 does not protrude from the detection surface of the sensor 1.

As shown in FIG. 2, if the sensor and its application equipment are installed in the required positions in advance, it is easier to apply the sensor to measuring a downward measuring surface in a position that is out of reach of the hand.

Since the time required for measurement is usually one degree of decentralization, the hand will not get tired even if the handle 5 is pushed up lightly.

During this time, even if the force or direction of the hand changes, the contact between the element enclosure E and the measurement surface is not affected due to the buffering function of the elastic pressurizing material 4.

When the dimensions of sensor 1 change, loosen tightening screw 9 and tighten wire rod 8.
The distance between the pressurized parts of the wire rods 8 on both sides may be adjusted to the pressurized position of the new sensor by pulling out or pushing in the support material (tube) 7.

Further, since the base plate 6 and the tip of the handle 5 are screwed together, the base plate 6 and the pressurizing material 4 can be completely replaced with different ones.

The sensor 1 of the embodiment of FIG. 8 has no fasteners and is not coupled to the elastic pressure member 4.

The wire rods 8 on both sides of the pressurizing material 4 have their legs widely opened, and when pressurizing, the pressurizing portions 8a act to stretch the sensor 1, so that the element enclosing portion E uniformly contacts the measurement surface without loosening. That's what I do.

The embodiments of this invention have been explained above using two examples, but the embodiment of this invention should be appropriately designed by the designer using his or her known technology depending on the shape, size, application location, conditions, etc. of the sensor, and can be varied and applied in various ways. It is only natural that you will be disappointed.

In particular, the elastic pressurizing material is not limited to wire rods, but may also be a plate spring, a rectangular cylinder made of elastic non-metallic material, etc. In short, it may be a means to press the position where the inner element of the sensor is removed and bring the enclosed part into uniform contact with the measurement surface. Bye.

This idea breaks the fixed concept that adhesive materials or magnets are used to apply heat flow sensors to measurement surfaces.

Although the heat flow sensor takes longer to measure than a thermometer, it is not so long that a person would get tired holding it by hand.

Even if the hand moves or the pressure angle deviates from the vertical, the elastic support method does not affect the element enclosure of the sensor, and there is no risk of disturbing heat flow.

In other words, this idea dramatically simplifies heat flow measurement work,
It's about streamlining things.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a heat flow sensor, Fig. 2 is an explanatory diagram of an embodiment of this invention, Fig. 3 is an explanatory diagram of another embodiment, and Fig. 4 is an explanatory diagram of another embodiment.
The figure is a partially detailed view of Figure 2, in which 4 is an elastic pressure material, 5
indicates the pattern.

Claims (1)

[Scope of utility model registration request] It is a device that applies a flexible plate-shaped sensor, which is the detection part of a heat flow meter, to the measurement surface, and it has a rod-shaped handle and a tip of the handle attached at right angles, at a position away from the internal element of the sensor. and an elastic pressure member that is pressed to bring the element enclosing portion into uniform contact with the measurement surface, the handle has a substrate at its tip, and the elastic pressure member includes left and right support members attached parallel to both sides of the substrate. The front and rear U-shaped elastic wire rods are provided with front and rear U-shaped elastic wire rods whose ends are respectively supported by the front and rear sides of the left and right support members, and a set screw for fixing the ends of the wire rods that are slidably supported by the support members. A device for applying a heat flow sensor, wherein the base portion of the U-shape presses flat near both ends of the target sensor, and the legs of the U-shape wire are elastically curved by axial pressure of the handle.