KR960013253B1 - Fluid level meter - Google Patents

Abstract

a hollow sealed container(10); a ring-shaped float(20) and movable member(58) around the sealed container; a passive block(33) moving along with the movable loop(58) by magnetic force; a variable resistance displacement measuring apparatus that has resistance plate(30) parallel to a guide rod(32) and an elastic bruch(34) fixed on the passive block(33); and a tap terminal(39) connected with the elastic brush(34). When the oil(72) level rises, the float(20) and movable member(58) rises along. Then the passive block(33) rises along with the loop(58) along the guide rod(32). The elastic brush(34) fixed on the passive block(33) rises as contacted with the resistance plate(30). And the variation of the electric potential appears through the tap terminal(39) and displays on an oil meter.

Description

Float Flow Gauge

1 is a schematic perspective view showing an example of a conventional float type flow gauge.

2 is a cross-sectional view showing a state in which the conventional float type flow gauge shown in FIG. 1 is installed in a fuel tank.

3 is a perspective view showing the overall configuration of a float type flow gauge according to the present invention.

4 is a sectional view taken along line II of FIG.

5 is a cross-sectional view showing another embodiment of the guide rod shown in FIG.

Figure 6 is a partially separated perspective view showing another embodiment of the linear displacement amount measuring means according to the present invention.

7 is a partially separated perspective view showing another embodiment of the linear displacement direction measuring means according to the present invention.

8 is a cross-sectional view showing a state in which a float type flow gauge according to the present invention is installed in a fuel tank of an automobile.

* Establishment of symbols for the main parts of the drawings

10: airtight container 20: annular float

11: float latching jaw 30a, 30: straight type resistive film

30b: copper foil 31: substrate

32: guide rod 33: driven block

34a, 34: elastic brush 35a, 35b: lead wire

40: buffer member 36: flexible conductor

37,38: 1st terminal, 2nd terminal 39a: 1st contact

39b: 2nd contact 50, 51: terminal

54: wrinkles 56: incision

57: bracket 58: movable member

59a, 59b: Guide rod support boss 39,70: Tab terminal

The present invention relates to a float type flow gauge, and more particularly, to isolate the linear gauge from the fluid so as to avoid mutual chemical effects, while detecting a change in the oil level of the fluid tank by moving the float to indirectly transfer to the gauge. The present invention relates to a float type flow gauge capable of measuring flow rate.

As is well known, for example, the entire vehicle is provided with a fuel tank in which fuel is stored, and the fuel tank is essentially provided with a flow gauge for visually displaying the remaining amount of fuel stored therein.

FIG. 1 is a view showing an example of a conventional float type flow gauge. According to the flow gauge, a printed circuit board 3 having an arc-shaped resistive film 2 printed thereon is installed inside a rectangular housing 1, The brush 4 which is brought into contact with the arc-shaped resistor 2 to slide is rotatably installed inside the housing 1, while the float arm 5 is rotatably installed outside the housing 1. The float arm 5 is installed at the same position as the center of rotation of the brush 4, and the brush 4 is fixed to one end of the float arm 5 and float 6 at the other end thereof. Will be installed.

As shown in FIG. 2, the float-type flow gauge having such a configuration is installed on one inner wall of the fuel tank, and the float arm 5 is moved in accordance with the up / down movement of the float 6 according to the flow rate filled in the fuel tank. Since the brush 4 is moved along the arc-shaped resistive film 2 by the swinging action of the float arm 5, the voltage change which is changed by the drawing terminal 8 of the brush 4 side is turned. From this, the flow rate of the fluid is measured.

However, the float flow gauge of such a structure is installed inside the fuel tank filled with fuel, so that the arc-shaped resistive film 2 and the brush 4 operate in an exposed state in the fuel tank. In such a case, a state in which the arc-shaped resistive film 2 and the brush 4 are electrically separated from each other by dust or foreign matter mixed in the fluid is likely to be caused, thereby making it difficult to measure the flow rate due to poor contact or the like.

In addition, precise flow measurement becomes cumbersome as the length of the float arm 5 pivoting with an integral structure from the center of rotation of the brush 4 to the respective ends of the arc trajectory is slightly different. . That is, since the float arm 5 is formed relatively longer than the brush 4, the turning distance of the brush 4 is shorter than the turning distance of the float arm 5, so that the maximum and minimum values of the fluid filled in the fuel tank 7 are short. The flow measurement can be measured somewhat precisely only by differentiating the moving distance of the float arm 5 turning to match the small movement of the brush 4 moving within the length range of the arc-shaped resistive film 2. This must be realized by trimming the arc-shaped resistive film 2 at a fine interval or by electronic circuit processing.

However, in the above-described configuration, the arc-shaped resistive film 2 applied to the printed circuit board 3 at a small interval is easily peeled off or scratched by contact friction with the brush 4 during use, thereby affecting the detection of the purified flow rate. If the voltage level due to the contact movement action of the brush 4 on the resistive film 2 has to be processed electronically, it is disadvantageous in manufacturing due to parts and additional labor added to the circuit configuration. do.

The present invention has been made to solve the problems described above, the flow sensor installed in the fuel tank is operated in conjunction with the float movement in accordance with the flow rate of the sealing structure is isolated from the fluid to prevent foreign matters into the flow sensor In addition, it is an object of the present invention to provide a float type flow gauge that can easily perform precise measurement of flow rate and improve the reliability of the flow measurement.

In order to achieve the above object, according to the present invention, a float type flow sensor comprising a float installed in an oil tank and buoyant according to the oil level and operated according to the movement of the float, wherein the float is in the oil tank. Installed in the outer periphery of the straight and hollow sealed container 10 is installed in the annular movable member 58 is formed in an annular shape to move in response to the change of the oil surface, the sealed container (10) It is accommodated and inserted into the guide rod 32 of the polygon and the guide rod 32 formed between the opposite end surface of the sealed container 10 to detect the voltage change with respect to the change amount of the oil surface by the movable member material 58 And the movement of the driven block 33, which is linked to the guide member 58, the elastic brush 34 integrally formed on the driven block 33, and the elastic brush 34 to the potential change A linear change amount measuring means having a potential detection pattern for detecting, a float catching jaw 11 formed around the bottom surface of the airtight container 10 to prevent downward dropping of the annular float 20, and the Float Hung flow gauge provided on the bottom surface of the sealed container 10 and further provided with a buffer member 40 for cushioning the impact of the pudong block 33 is provided.

Hereinafter, an embodiment of a float type flow gauge according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a view showing an embodiment of a float type flow gauge according to the present invention, according to the float type flow gauge is provided with a relatively straight and hollow sealed container 10 in consideration of the amount of change of the famous to be measured In addition, a linear displacement amount measuring means including a mover and a stator is installed inside the sealed container 10, and is installed to be parallel to the installation direction of the sealed container 10 while the outer circumference of the sealed container 10 is provided. An annular float 20 which is linearly and vertically moved along the installation is movable in the longitudinal direction on the outer circumference of the hermetically sealed container 10, and has a guide rod support boss 59a on the inner ceiling and the bottom of the hermetically sealed container 10. The upper and lower ends of the guide rods 32 are fitted into the guide rod support bosses 59a and 59b. The guide rod 32 is installed to be somewhat parallel to the direction of molding of the sealed container 10, and the driven block 33 guided up and down by the guide rod 32 is guided to the guide rod 32. The movable member 58 is fitted to the slide movable, the movable block 58 and the mutually magnetic force is formed integrally with the annular float 20, the lower end of the sealed container 10 in the annular The float catching jaw 11 is formed to prevent the float 20 from falling downward.

When the sealed container 10 having the above-described configuration is installed in the fuel tank in such a manner as to be somewhat perpendicular to the oil level of the fuel contained in the fuel tank, the annular float 20 responds to the oil level by the change of the oil level corresponding to the flow rate of the fuel. The position is changed so that the potential of the position corresponding to the changed annular float 20 is detected by the linear displacement measuring means.

Here, the linear displacement amount measuring means can be configured as a slide type variable resistance type as a potential detecting member, and such a configuration is a linear resistance parallel to the guide rod 32 as shown in FIGS. 3 and 4. A substrate 31 having a film 30 formed on one surface thereof, an elastic brush 34 installed on the driven block 33 and elastically adhered to the linear resistance wave 30, and both ends of the linear resistance film 30. The first terminal 37 and the second terminal 38 insulated from each other so as to be drawn from one end of the sealed container 10 while energizing each of the conductive wires 35a and 35b, and the elastic brush 34 ) Is composed of a tab terminal 39 insulated so as to be drawn from one end of the sealed container 10 together with the first terminal 37 and the second terminal 38 while energizing the flexible conductor 36. do.

Further, the linear displacement measuring means is not limited to the slide type variable resistance type shown in Figs. 3 and 4, but is applied to a slide type optical scale or an electromagnet by a combination of a light emitting element and a light receiving element. Of course, it can also be configured as a sliding magnetic scale.

On the bottom surface of the sealed container 10, it is preferable to install a shock absorbing member 40 made of rubber or a compression coil spring to absorb the drop impact of the driven block 33 to maintain the durability of the product.

Further, the flexible conductive wire 36 connected to the elastic brush 34 and the first terminal 37 or the second terminal 38 is helical so that the flexible conductive wire 36 is moved during the lifting motion of the driven block 33. It is desirable to have this flexibility and to prevent twisting by the self stress of the flexible conductor 36.

In addition, the movable member 58 formed integrally with the annular float 20 is preferably in the shape of a ring bonded to the inner circumference of the annular float 20, and the movable member 58 or the driven block 33 One of them is formed of a magnetic material while the other is formed of a metal material, which is a magnetic sensitive material attracted to the magnetic force, or the magnetic surface of the auto member 58 and the driven block 33 have different polarities. It is preferable to form.

In addition, the guide rod 32, as shown in Figure 5, it is preferable that the cross-section is formed in the polygon to prevent rotation during the lifting movement of the driven block 33, in the present embodiment the guide Rod 32 is formed in the shape of a rectangular cross-section.

6 is a view showing another embodiment of the linear displacement amount measuring means of the slide type variable resistance type, and the linear resistance film 30a and the copper foil 30b are mutually insulated and coated on one surface of the substrate 31. The first contact 39a and the second contact 39b are integrally formed in the elastic brake 34a which slides while being in close contact with the straight resistance film 30a and the copper foil 30b. Two terminals 50 and 51 are drawn out from both ends of the 30a, and a tab terminal 70 for energizing the copper foil 30b is connected to the copper foil 30b. In addition, the elastic brush 34a is fastened to the driven block 33, and the elastic brush 34a is elastically adhered to the linear resistance film 30a and the copper foil 30b so that the linear resistance film 30a or It is configured to measure the linear displacement amount of the movable member 58 by drawing out the resistance value that changes when moving in the longitudinal direction of the copper foil 30b through the tab terminal 70.

7 shows another embodiment of the linear displacement amount measuring means according to the present invention. In the linear displacement amount measuring means according to the embodiment, the elastic brush 34a is equal to the linear resistance film 30a and 30b. It has a structure in which meandering wrinkles 54 are formed in which a hepatic force acts in a direction in close contact with them.

In addition, a cutout 56 is formed between the first contact 39a and the second contact 39b integrally formed in the elastic brush 34a to elastically buffer different tolerances without mutual influence.

Therefore, the float type flow gauge of the above structure can be applied to the flow rate measurement by installing in the fuel tank of the vehicle, the example will be described with reference to the accompanying drawings.

First, as shown in FIGS. 3 and 8, the upper end of the sealed container 10 is provided with a disk-shaped bracket 57 larger than the diameter of the sealed container 10, and the edge of the bracket 57 is provided. A plurality of fastening holes 74 penetrating up and down on the surface of the fuel tank 7 are installed so as to float vertically through the fastening holes 74 using bolts 76 as observation means in the upper ceiling of the fuel tank 7. According to the change of the oil surface according to the change amount of the fuel 72 in (7), the said annular float 20 moves up and down.

In FIG. 3, reference numerals 80a and 80b denote fingerboard support bosses for supporting the substrate 31. As shown in FIG.

In addition, the above-described float flow gauge is not limited to the application example for the fuel tank flow measurement of the vehicle, and the oil tank, automotive liquefied petroleum gas (LPG) gauge for automobiles, household oil gauge, water tank, etc. Of course, it is applicable to the configuration for measuring the amount of fluid in the oil tank containing the fluid.

Next, the operation of the float flow gauge according to the present invention having the above-described configuration will be described.

According to the present invention, the float type flow gauge is installed in the oil tank, and the following description will be made by taking a state in which the float type flow gauge of the present invention is installed in the fuel tank of the vehicle.

First, when the float 72 flow rate gauge is installed in the fuel tank 7 of the vehicle in the form illustrated in FIG. 8, a large amount of the fuel 72 is consumed to recharge the fuel 72. When the fuel 72 is injected, the oil level of the fuel 72 in the fuel tank 7 is raised, and the height of the annular float 20 suspended by the buoyancy of the fuel 72 is high. It is changed corresponding to the height change of the oil level of 72.

At this time, the movable member 58, which is formed of a magnetic body or magnetic sensitive material while being formed integrally with the annular float 20, moves along the longitudinal outer circumference of the sealed container 10 together with the annular float 20, In accordance with the movement of the movable member 58, the driven block 33 inside the sealed container 10, which is attracted to each other by magnetic force, moves up inside the sealed container 10 while receiving a linear guide of the guide shelf 32. The elastic brush 34 integrally formed on the driven block 33 is linearly moved on the linear resistance film 30 in a state of being elastically in close contact with the linear resistance film 30 firmly supported by the engine 31. .

On the other hand, as described above, the power applied to the first terminal 37 or the second terminal 38 connected to both ends of the linear resistance film 30 by the displacement amount linearly displaced according to the height of the oil surface is elastic brush 34. The partial pressure portion of the applied voltage is drawn out from the tap terminal 39 connected to the coil terminal, and is applied to the coil type flow rate display unit, which is a flow rate display unit (not shown). The change of is displayed continuously.

When the height of the oil surface is lowered according to the consumption of the fuel 762 similar to the increase of the oil level above, the driven block 33 and the elastic brush 34 moving in the same direction as the annular float 20 moves. In conjunction, the movement of the guideline of the coil type flow indicator is reversed.

In addition, as shown in FIG. 6 and FIG. 7, when implementing another example of the linear displacement amount measuring means according to the present invention, when the fuel 72 in the fuel dunk 7 is filled and the oil level becomes high, The annular float 20 and the movable member 58 are raised, and the driven block 33 is also lifted by the raised movable member 58, and the displacement amount linearly displaced according to the height of the oil level is linear resistance. The power applied to the terminal 50 or another terminal 51 connected to both ends of the film 30a is brought into contact with the linear resistive film 30a via the first contact 39a of the elastic blush 34a. The partial pressure potential is drawn out and transferred to the copper foil 30b through the second contact 39b integrated with the elastic brush 34a in contact with the copper foil 30b, and the partial pressure potential is transferred to the copper foil 30b. For example, a coil flow rate display unit withdrawn from the tab terminal 70 connected to one end of It is to be applied.

Therefore, according to the present invention described above, the flow gauge with precise resolution can be configured without the aid of a simple structure and an additional driving circuit, and the reliability of the flow measurement can be improved, and the flow sensor is directly connected to the oil or water to be measured. Since there is no contact, there is no fear of malfunction due to residual impurities, thereby extending the life of the float type flow gauge.

Claims (11)

A float type flow sensor composed of a float installed in an oil tank and a float sensor buoyant according to the oil level and operated according to the movement of the float, wherein the float is a straight and hollow sealed container installed inside the oil tank ( 10 is formed in an annular shape having an annular movable member 58 which is installed on the outer periphery and moves in response to the change of the oil surface, and is housed in the hermetic container 10 and the oil surface by the movable member 58. Driven to be inserted into the guide rod 32 and the guide rod 32 of a polygon formed between the opposite end faces of the sealed container 10 so as to detect the voltage change with respect to the change amount of the interlocking member 58. Block 33, an elastic brush 34 integrally formed on the driven block 33, and a potential detection pattern for detecting the movement of the elastic brush 34 as a potential change On the bottom surface of the sealed container (10) and the float catching jaw (11) formed around the bottom surface of the sealed container (10) to prevent downward dropping of the annular float (20). Float-type flow rate gauge, characterized in that further provided with a buffer member 40 for cushioning the impact of the rock to be driven (33). The float type flow gauge according to claim 1, wherein the potential detection pattern of the linear displacement measuring means is a sliding optical scale. The method of claim 1, wherein the potential detection pattern of the linear displacement measuring means is a slide type variable resistance type, the substrate 31 having a linear resistance film 30 parallel to the guide rod 32 on one surface, and the linear type The first terminal 37 and the second terminal which are insulated so as to protrude into and out of one side end of the airtight container 10 while the conductive wires 35a and 35b are energized at both ends of the resistive film 30. (38) and the elastic brush (34) are energized via a flexible conductive wire (36). Float type flow gauge, characterized in that the first terminal 37 and the second terminal 38 is further provided with a tab terminal (39) insulated so as to protrude into and out of one side end of the sealed container (10). 6. The float type flow gauge according to claim 5, wherein the elastic brush (34) and the flexible conductor (36) connected to the first terminal (37) or the second terminal (38) are spiral. The float type flow rate according to claim 1, wherein the movable member (58) is made of a magnetic material, and the driven block (33) interlocked with the movement of the movable member (58) is formed of a metal material which is a magnetic sensitive material. gauge. 2. The method of claim 1, wherein the linear displacement measuring means has a dislocation detection member having a slide type variable resistance type, and the linear resistance film 30a and the copper foil 30b are mutually insulated and coated on one surface of the substrate 31 in parallel with each other. The first contact 39a and the second contact 39b are integrally formed on the elastic brush 34a which slides while being energized in close contact with the linear resistance film 30a and the copper foil 30b, respectively. Two terminals 50 and 51 are connected from both ends of the 30a, and a tab terminal 70 for energizing the copper foil 30b is connected to the copper foil 30b, and the elastic brush 34a is connected to the copper foil 30b. In addition to being fastened to the driven block 33, the elastic brush 34a is elastically in close contact with the linear resistance film 30a and the copper foil 30b to move in the longitudinal direction of the linear resistance film 30a or the copper foil 30b. Linear displacement of the movable member 58 by drawing out the resistance value that changes when the tap terminal 70 through A float-type flow rate, characterized in that the gauge to measure. 14. The meandering wrinkle portion 54 of claim 13, wherein an elastic force acts on the elastic brush 34a so as to be in close contact with the linear resistance film 30a and the copper foil 30b. Float type flow gauge 15. The float type flow gauge according to claim 13 or 14, wherein an incision portion 56 is formed between the first contact 39a and the second contact 39b integrally formed in the elastic brush 34a. . The float type flow gauge according to claim 1, wherein said buffer member (40) is rubber. The float type flow gauge according to claim 1, wherein the buffer member (40) is a compression coil spring. The disk-shaped bracket (57) larger than the diameter of the sealed container (10) is formed at the upper end of the sealed container (10) to vertically insert the sealed container (10) into the oil tank. A plurality of fastening holes 74 penetrating up and down on the rim surface of the bracket 57 are pierced vertically by fastening means through fastening means 74 on the upper ceiling of the oil tank, thereby providing oil in the oil tank. Float-type flow gauge, characterized in that the annular float 20 is configured to move up and down in accordance with the change of the oil surface according to the change amount of.