KR200250404Y1 - A Device of Level Measurement mounting Thermal Level Switches - Google Patents

Abstract

The present invention relates to a level meter having a heat spreading level switch, the level switch according to the present invention, a cover with a built-in control, a cylindrical connector is inserted into and fixed to the cover, and the fluid is coupled to the connector A support surface supported on the outer surface of the tank, a through hole coupled with the connector to penetrate the support surface, a rod linked with the through hole to transmit current, and a heat diffusion type level switch coupled with the rod to sense a flow rate It is made, including.

Therefore, by coupling a plurality of heat diffusion level switches to the rod of the level meter, it is possible to accurately measure the sudden change in the water level according to the flow rate, thereby reducing the flow rate detection error.

Description

A Device of Level Measurement mounting Thermal Level Switches

The present invention relates to a level meter with a heat spreading level switch, in particular a level with a heat spreading level switch for measuring a change in water level with a flow rate by coupling a heat spreading level switch to a rod of the level meter. It relates to a measuring instrument.

In general, the heat diffusion flow measurement utilizes a phenomenon in which heat is transferred from a device to a fluid at a constant rate by the temperature difference between the device and the fluid when the device heated by the current is in the flow of the fluid.

However, the conventional level meter or flow meter using the above method has a problem in that a flow rate detection error frequently occurs according to the flow rate distribution. That is, when the flow rate changes abruptly, it is affected by the heat conduction loss to the level support part, so the response is delayed and the flow rate measurement error occurs.

In addition, the conventional level meter or flow meter has a problem that it is difficult to measure the level of the fluid is changed in a large amount in the fluid tank by detecting the flow rate through a single flow sensor.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a level meter having a heat spreading level switch for measuring a change in water level according to a flow rate by coupling a plurality of heat spreading level switches to a rod of the level meter. There is.

1 is a perspective view showing a level meter having a heat spreading level switch according to the present invention

2 is a cross-sectional view showing a level switch with a heat spreading level switch according to the present invention;

3 is a cross-sectional view showing a heat diffusion type level switch according to the present invention.

Figure 4a is a cross-sectional view showing the first level rod cut in the heat diffusion type level switch according to the present invention

Figure 4b is a cross-sectional view showing the second level rod cut in the heat diffusion type level switch according to the present invention

Figure 5 is a perspective view showing a preferred embodiment of a level meter with a heat spreading level switch according to the present invention

※ Explanation of code for main part of drawing

1: cover 2: connector

3: support surface 4: through hole

5: load 6: heat spreading level switch

7: Groove for level switch

Level measuring device according to the present invention for achieving the above object, a cover with a built-in control unit, a cylindrical connector is inserted and fixed to the cover, a support surface coupled to the connector and supported on the outer surface of the fluid tank, It includes a through hole coupled to the connector and penetrating the support surface, a rod interlocked with the through hole to transmit current, and a heat diffusion type level switch coupled to the rod to sense the flow rate.

Preferably, the rod has a groove for the level switch to engage the heat spreading level switch.

Preferably, the rod can be coupled with a plurality of heat spreading level switches through a plurality of grooves for the level switch.

The heat spreading level switch may include a housing configured to be inserted into a groove for a level switch of the rod to receive a current, a body integrally formed with the housing, a first level rod coupled to and heated at a front surface of the body; A second level rod coupled to the front side of the body and formed side by side on a side of the first level rod to measure the temperature heated by the first level rod and coupled to the front side of the body to measure the temperature of the fluid It is preferred to include a third level rod for.

It is preferable that the spiral part is formed in the outer surface of the said housing.

The housing may be fixed to the rod of the level meter through a screw that is coupled to the spiral formed on the outer surface.

The first level rod includes a heater and a heater rod for heating the first level rod, the inside of the first level rod is filled with an insulator, and the heater and the heater rod pass through the housing and the body. It is desirable to be able to receive the current through.

Nichrome wire, which is a heating wire, may be embedded in the first level rod, and the inside of the first level rod may be filled with an insulator.

The temperature sensor made of platinum is embedded in the second level rod and the third level rod, respectively, and the inside of the second level rod and the third level rod is filled with an insulator, and the temperature sensor passes through the housing and the body. It is desirable to be able to receive current through the wire.

The second level rod and the third level rod may be embedded with a platinum wire or a wire whose portion is a platinum component, and the inside of the second level rod and the third level rod may be filled with an insulator.

The first level rod, the second level rod and the third level rod are preferably formed to be parallel to each other in the flow of the fluid.

The outer surfaces of the first level rods, the second level rods, and the third level rods are preferably surrounded by stainless steel or chrome steel.

1 is a perspective view showing a level meter with a heat spreading level switch according to the present invention, Figure 2 is a cross-sectional view showing a level switch with a heat spreading level switch according to the present invention. That is, as shown in the figure, the level measuring device according to the present invention, the cover is a built-in control unit, the cylindrical connector (2) is inserted and fixed to the cover 1, coupled to the connector (2) A support surface 3 supported on the outer surface of the fluid tank, a through hole 4 coupled to the connector 2 to penetrate the support surface 3, and a rod interlocked with the through hole 4 to transmit current ( 5) and a plurality of heat spreading level switches 6 coupled to the level switch groove 7 perforated in the rod 5 for sensing the flow rate.

In addition, the heat diffusion type level switch 6 includes a housing 10 fixed to the rod 5 of the level meter through a spigot screw 9 coupled to a spiral 8 formed on an outer surface thereof, and a housing 10. A body 11 formed integrally with the body 11, a first level rod 15 coupled to the front portion of the body 11 and heated, and a first level rod 15 coupled to the front portion of the body 11. The second level rod 20 is formed in parallel to one side of the second level rod 20 for measuring the temperature is heated and the third level rod 30 for measuring the temperature of the fluid is coupled to the front portion of the body (11).

The heat spreading level switch 6 is inserted into the rod 5 through the level switch groove 7 to receive current from a control unit (not shown) built in the cover 1.

The rod and the heat spreading level switch coupled thereto may be inserted into the fluid tank to measure a change in the water level according to the flow rate.

The rod may extend depending on the size or depth of the fluid tank and may be combined with a plurality of heat spreading level switches to detect the level of the fluid.

3 is a cross-sectional view showing a heat spreading level switch coupled to a level meter according to the present invention, and as shown in the drawing, the heat spreading level switch according to the present invention is a level meter through a spiral portion 8 formed on an outer surface thereof. The body 11 is inserted into the groove for the level switch formed in the rod of the housing is fixed by the hexagonal screw (9) to receive the current from the control unit, the body (10) integrally formed with the housing (10) and placed in the fluid And a first level rod 15 and a front surface of the body 11 that are coupled to the front portion 12 of the body 11 and heated by the built-in heater 13 and the heater rod 14 to be used as measuring elements. The temperature of the fluid is measured through the second level rod 20 and the temperature sensor 21 for measuring the temperature is coupled to the portion 12 and formed side by side on the side of the first level rod 15 and heated The third level rod 30 to achieve temperature compensation It achieved by also.

The heater 13, the heater rod 14, and the temperature sensor 21 may receive current through the wire 16 passing through the housing 10 and the body 11 coupled to the level meter.

A cross-sectional view of a first level rod of the heat spreading level switch according to the present invention is shown in FIG. 4A. That is, the first level rod 15 according to the present invention, the heater 13 and the heater rod 14 for heating the first level rod 15 is built-in, the heater 13 and the heater rod ( 14 receives current from the level meter via a wire 16 through the body and the housing. In addition, the interior 17 of the first level rod 15 is filled with an insulator to prevent the current delivered to the heater 13 and the heater rod 14 from leaking out unnecessarily.

The outer surface 18 of the first level rod 15 is made of iron-chromium-based stainless steel or steel having high corrosion resistance to protect the built-in heater 13 and the heater rod 14 without abrasion even in a fluid. It is surrounded by chrome steel.

As a modification of the first level rod of the heat diffusion type level switch according to the present invention, instead of the heater and the heater rod embedded in the first level rod, a nichrome wire having a predetermined diameter is embedded as a heating wire. By controlling the current applied to the nichrome wire, the degree of heat generation can be controlled. The nichrome wire is a heating wire made by alloying nickel and chrome, and its maximum operating temperature is about 950 ° C to 1100 ° C, and its cross-sectional area with the same electrical resistance is about 60 to 70 times higher than that of the copper wire of the same length and has good processability. It can be processed under cooling condition. The diameter of the nichrome wire varies from about 0.05 to 12 mm so that the degree of heat generation can vary depending on the strength and cross-sectional area of the current.

4B is a cross-sectional view of a second level rod or a third level rod of the heat spreading level switch according to the present invention, and as shown in the drawing, the second level rod 20 or the third level rod according to the present invention. A temperature sensor 21 made of platinum (platinum) is embedded in the 30, and the temperature sensor 21 receives current from the level meter through a wire 16 passing through the body and the housing. In addition, the inside 22 of the second level rod 20 or the third level rod 30 is filled with an insulator, which is a non-conductor, to protect the current transmitted to the temperature sensor 21, which is a conductor, from leaking to the outside unnecessarily. .

In addition, the outer surface 23 of the second level rod 20 or the third level rod 30 is also surrounded by iron-chromium stainless steel or chromium steel having high corrosion resistance to protect the temperature sensor 21 from fluid. Can be.

As a modification to the second level rod or the third level rod of the heat spreading level switch according to the present invention, a platinum wire or a part thereof is replaced using a platinum component instead of the temperature sensor made of platinum. The temperature of the fluid may also be measured.

The platinum wire or a portion of the platinum wire is very stable in air, moisture, and the like, and is resistant to acids and alkalis and is resistant to acids and alkalis because of its high resistance to acid and alkali, and can be used as a platinum resistance thermometer.

5 is a perspective view showing a preferred embodiment of a level meter with a heat spreading level switch according to the present invention. That is, as shown in the figure, the lower surface and the rod 5 and the heat spreading level switch 6 of the through hole 4 of the level gauge according to the present invention is inserted into the fluid tank 40 and the supporting surface 3 It is fixed to the outer surface of the fluid tank 40 through) can measure the water level change according to the flow rate.

Hereinafter will be described in detail with reference to the accompanying drawings the operation of the level meter with a heat diffusion type level switch according to the present invention.

First, the rod 5 and the heat spreading level switch 6 according to the present invention are set according to the size of the fluid tank. That is, the length of the rod 5 may be extended when the level of the fluid flow is large, and thus the heat spreading level switch 6 may be further provided. The plurality of heat spreading level switches 6 are coupled with the rod 5 via the level switch grooves 7. The rod 5 and the heat spreading level switches 6 are inserted into the fluid tank, and the housing 10 and the body 11 of the heat spreading level switch 6 via the rod 5 from a control embedded in the lid. The current is supplied to the first level rods 15 and the second level rods 20 through the wires 16 interlocked with each other.

At this time, the first level rod 15 is heated higher than the ambient temperature by the heater 13 and the heater rod 14 embedded in the first level rod 15 and connected to the wire 16. It is measured by a temperature sensor 21 embedded in the second level rod 20. The temperature at which the heat is taken away and cooled by the fluid is measured by the temperature sensor 21 embedded in the third level rod 30, and the second level rod 20 and the third level rod 30 are cooled. The temperature measured by is transferred to the control circuit through the rod 5 to measure the flow rate by converting the temperature difference into power. That is, the heated first level rod 15 is heated to a temperature before it is cooled again by heating the first level rod 15 again by increasing power through the control circuit to supply the amount of heat lost due to cooling by the fluid. When the flow rate is increased, the power is cooled again and the power supplied from the control circuit increases. As described above, the level gauge having a heat diffusion type level switch according to the present invention measures the change in the water level in the fluid tank by changing the power of the temperature difference of the fluid that changes according to the flow rate of the fluid.

In addition, the heated first level rod 15 has a heat loss depending on the amount of fluid, and the resistance value is changed by the fluid temperature. However, since the third level rod 30 is not heated, the heat loss due to the fluid Since the resistance value is changed only by the temperature of the fluid, the third level rod 30 may act as a temperature compensating element.

As described above, according to the embodiment of the present invention, by combining a plurality of heat diffusion level switches to the rod of the level meter, it is possible to accurately measure the water level change according to the flow rate.

Therefore, according to the level measuring device having a heat spreading level switch according to the present invention, by coupling a plurality of heat spreading level switches to the rod of the level meter, it is possible to accurately measure the sudden change in the water level according to the flow rate to reduce the flow detection error It can be effective.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended utility model claims. will be.

Claims (12)

A cover with a built-in control unit; A cylindrical connector fixedly inserted into the cover; A support surface coupled to the connector and supported on an outer surface of the fluid tank; A through hole coupled to the connector and penetrating the support surface; A rod interlocked with the through hole to transmit a current; And A heat spreading level switch coupled to the rod for sensing a flow rate; Level gauge having a heat spreading level switch comprising a. The method of claim 1, And the rod has a groove for the level switch for coupling the heat spreading level switch. The method of claim 2, And said rod can be coupled with a plurality of said heat spreading level switches through a plurality of said level switch grooves. The method of claim 1, The heat diffusion level switch, A housing inserted into a groove for the level switch of the rod to receive a current; A body formed integrally with the housing; A first level rod coupled to the front part of the body and heated; A second level rod coupled to the front portion of the body and formed side by side on a side of the first level rod to measure a temperature heated by the first level rod; And A third level rod coupled to the front portion of the body for measuring the temperature of the fluid; And a level meter comprising the heat spreading level switch. The method of claim 4, wherein And a spiral portion formed on an outer surface of the housing. The method according to claim 4, wherein And the housing is fixed to the rod of the level meter via a screw that is coupled to the helix formed on an outer surface thereof. The method of claim 4, wherein The first level rod includes a heater and a heater rod for heating the first level rod, the inside of the first level rod is filled with an insulator, and the heater and the heater rod pass through the housing and the body. Level measurement with the heat spreading level switch, characterized in that the current can be supplied through. The method of claim 4, wherein The first level rod may include a nichrome wire, which is a heating wire, and the inside of the first level rod is filled with an insulator. The method of claim 4, wherein The temperature sensor made of platinum is embedded in the second level rod and the third level rod, respectively, and the inside of the second level rod and the third level rod is filled with an insulator, and the temperature sensor passes through the housing and the body. Level measurement with a heat spreading level switch, characterized in that the current can be supplied through a wire. The method of claim 4, wherein The second level rod and the third level rod may be embedded with a wire of platinum wire or a portion thereof is a platinum component, wherein the inside of the second level rod and the third level rod is filled with an insulator Level meter with diffused level switch. The method of claim 4, wherein And the first level rod, the second level rod, and the third level rod are formed in parallel with the flow of the fluid. The method of claim 4, wherein And outer surfaces of the first level rod, the second level rod, and the third level rod are surrounded by stainless steel or chrome steel.