JPS60154117A - Magnetic force joint type liquid-surface indicator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic joint type liquid level indicating device used in conjunction with large liquid sealed containers.1 Generally, in oil refineries, tankers, tank trucks, and chemical plants, large When a liquid-tight container is used, a liquid level indicating device is used to indicate the total level of the contained liquid. A schematic diagram of this liquid level indicating device is shown in FIG. The outline will be explained as follows: 1. A float 11 is suspended in a liquid tank housed in a liquid-tight container 10. This float 11 is connected to the bottom 51oa of the liquid-tight container 10.
It is assembled to linear guides 15 and 16 so that it can freely move up and down while being guided by linear guides 15 and 16 extending vertically between and the ceiling 10b. The top of the float 11 is connected to one end of the cord 12.

This cord 12 is stretched vertically upward, passes through a small hole (not shown) provided in the ceiling 10b of the liquid-tight container 100, and passes through a detour path 14 provided at the top of the liquid-tight container 10. , the cord guide tube 17' is bent and extended downward from the side of the liquid-tight container 10 from the side upper end force of this detour path 14, and is arranged below the side of the liquid-tight container 10. Reach gauge 16 in a tense state. As a result, the float 11, which is displaced up and down, directly operates the gauge 16 accurately in accordance with the amount of displacement.
6) The height of the liquid level in the tank is indicated.

In the liquid level indicating device described above, harmful gases generated inside the liquid sealed container 10 reach the gauge 16 through the small hole in the ceiling 10b of the liquid sealed container 10 and the cord guide pipe 17, and corrode the parts of the gauge 160. In order to prevent the harmful gas from entering the cord guide tube 17 from the liquid-tight container 10 by bending it vertically in the detour path 14 and using an fc tube, the It is designed to prevent However, since the passage of the cord 12 from the liquid-tight container 10 to the cord guide tube 17 is in communication after all,
The harmful gas enters into the cage 16 and this gauge 16
It is inevitable that the parts will be eroded.

Therefore, in order to eliminate the defects of the liquid level indicating device described above, the present inventor proposed a magnetic joint type G-level indicating device shown in FIG. 2 (see Taiwan Patent Application No. 7023862). The outline of this magnetic joint type liquid level indicating device is as follows. At a certain position on the bottom 20a of the liquid-tight container 20, a gooley 21 is pivotally supported on the bottom 20&, and a wheel 2 having a circumference 111 is paired with the pulley 21.
4 is pivotally supported above the top portion 20b of the liquid-tight container 20. Cord 22 to pulley 21 and wheel 24
is wound around the ends 25 and 2 of this cord 22.
6 are connected to the top center and bottom center of the float 26, respectively. Further, a tension coil spring 27 is inserted into a part of the cord 22, and this tension coil spring 27 keeps the cord 22 in a tensioned state at all times.

A liquid level display section 60 is provided on the top 20b of the liquid sealed container 20.
is provided. This liquid level display section 60 includes a combination gear type liquid level counter 62 and a counting drive section 66 that drives this liquid level counter 62 and incorporates the above-mentioned wheel 24 as a part.
It is composed of.

The liquid level counter 62 has a tooth number ratio' between the combination gears.
f. It is a mechanical type that displays the liquid level height and number for use. This liquid level counter 62 has its input gear +3
28 meshes with the output gear 33a of the counting drive unit 66.

In the box 61, the counting drive unit 66 is configured to drive the wheel 2.
It is divided into a wheel accommodating part accommodating 4T and a magnetic joint part 40 which is highly sealed. The wheel 24 is integrally connected to a shaft 28, and one end of the shaft 28 protrudes from the box 611 to form a handle 29.

Further, the other end of the shaft 28 becomes an input shaft of the magnetic force joint part 64.

As can be seen from the above configuration, the wheel 24 and shaft 28 rotate as the float 26 moves up and down, and the combination gear of the liquid level counter 62 rotates via the magnetic joint 64.

Therefore, when measuring the liquid level height of the liquid in the liquid-tight container 20, the measurer rotates the handle 29,
The float 26 is pulled up to the upper limit 11 in the liquid-tight container 20 and fixed at this position. The rotation amount of the shaft 28 during this time is data indicating the liquid level height of the liquid tank, and this data is directly displayed as the liquid level height by the liquid level counter 62.

The above-mentioned magnetic joint type number indicating device has a liquid-tight container 20.
Since the structure is such that the combination gears of the liquid level counter 62 are driven using the magnetic force joint part 64 which is completely sealed, the harmful gases generated in the liquid-tight container 20 are
There will be no corrosion of the parts of the HIL counter.

However, in practice, the following disadvantages still remain.

1) Since it is necessary to provide a pulley at the bottom of the liquid-tight container, the above-mentioned magnetic joint type liquid level indicator equipment and a dedicated liquid-tight container are required.

2) Since the vertical movement of the float is converted into the rotation of a wheel having a circumferential groove via the cord, the cord is likely to come off due to this wheel.

3) Connect the output shaft of the magnetic joint (i.e., n output gears of several assembly parts) to a combination gear type liquid level gauge [this liquid level meter must be mechanically connected to several input gears. The device must be installed in a liquid-tight container,
Remote measurement of the liquid level market becomes impossible.

4) The combination gear type liquid level counter is provided outside the output joint, and since the liquid level counter and the magnetic force joint are configured as mutually separate parts, the magnetic force type liquid level The entire indicating device is costly and is not compact.

5) The above-mentioned magnetic force joint is commonly used, and is susceptible to magnetic interference from the surroundings, which reduces the accuracy of measuring the liquid level.

In view of the points on paper, the inventor has conducted extensive research and has
We have completed the invention of a magnetic joint type liquid level indicator that eliminates the various defects.

The purpose of "Kienri" is to create a magnetic joint that can be easily attached to any liquid container, is compact, does not allow the member that transmits the vertical movement of the float to come off from the wheel, and allows remote measurement of liquid + AI. The mold level indicating device is fully provided. To this end, the present invention is a liquid container which is mounted on the top of a liquid container having a top and is partitioned by a magnetically permeable partition into having a first chamber and a second chamber;
a housing in which the second chamber is in communication with the liquid container and the second chamber is sealed with respect to the first chamber and the liquid container; a driving shaft rotatably supported in the first chamber; A wheel and a driving side magnetic force joint integrally connected to the driving shaft, a driven shaft rotatably supported at the second tail, a driven side magnetic force joint integrally connected to the driven shaft, and arranged in the second chamber. , a variable electrical resistor driven by a driven shaft, a liquid level data processing circuit connected to the variable electrical resistor and outputting the liquid level height, a belt wound around the wheel, and one end of this belt. It is characterized by consisting of a 70-tooth connected to the belt and suspended in a liquid in a single container, and an fc weight connected to the other end of the belt.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4. FIG. 3 shows a vertical cross section of the liquid level detection mechanism section 40 of the magnetic joint type liquid level indicating device of the present invention.
FIG. 4 shows the magnetic joint type liquid level indicating device of the present invention attached to a liquid-tight container 41. As shown in FIG. .

The magnetic joint type indicating device of the present invention is composed of a liquid level detection mechanism section 40 and a float mechanism section 42, as shown in FIG. .

As shown in FIG. 3, the liquid level detection mechanism section 40 is
The inside of the housing 46 is divided into a first chamber 45 and a second ridge 46 by a magnetically permeable partition wall 44. An opening 48 is provided in the bottom 47 of the first chamber 45. , whereby the first chamber 45 communicates with the interior of the liquid-tight container 41. On the other hand, the second chamber 46 communicates with the interior of the liquid-tight container 41.
The first chamber 45 and the liquid-tight container 41 are completely sealed by the peripheral wall 6 and the partition wall 44 . A pair of parallel support plates 49 and 50 are erected on the bottom 47 of the first support 45 . A raw NJJ/yaft 51 is supported by these support plates 49 and 50 via three bearings 52. One end of the main drive shaft 51 (the right end in FIG. 3 is pivotally supported by the support plate 49, and the other end of the main drive shaft 51 (the left end in FIG. 3)
Is the support plate b U? The r shell passes through and protrudes around the partition wall 44. At the other end of this main drive shaft 51, a main drive 9II1 magnetic force joint 56 having a U-shaped cross section is fixedly attached. Further, a wheel 54 is fixed to the main drive shaft 51 between the support plates 49 and 500.

A plurality of protrusions 55 are formed on the circumferential surface of the wheel 540 at equal intervals in the circumferential direction. In this wheel 54,
A belt 56 is wrapped around it.

This belt 56 is provided with a plurality of small holes 56a that fit into the projections 55 of the wheel 54.

This prevents slippage between the wheel 54 and the belt 56. As shown in FIG.
A float 57 is attached to one end (the left end in FIG. 4) of the belt 56, and a weight 58 that is lighter than or equal to the weight of the float 57 is attached to the other end (the right end in FIG. 4) of the belt 56. is being proclaimed.

At a position above the support position of the driving shaft 51, a pair of contact rollers 59 and 60 symmetrically arranged near the circumferential surface of the wheel 540 is supported between the support plates 49 and 50. These contact rollers 59 and 60 are for causing the belt 56 to be viewed by the wheel 54.

Tension rollers 61 and 62 symmetrically arranged with respect to the driving shaft 51 are supported between the support plates 49 and 50 below the supporting position of the wheel 54 in the housing.

These tension rollers 61 and 62 have a pair of flanges 66 on both sides to prevent the belt 56 from slipping off.
and 64 are provided.

A support plate 66 is also provided upright on the bottom 65 of the second chamber 46, and a driven shaft 67 is rotatably supported on this support plate 66 via two bearings 52. The support plate 66tjt passes through and exists on the same axis as the driving shaft 51. One end of the driven shaft 67 facing the partition wall 44 (right end in FIG. 3)
A driven side magnetic force joint 68 having the same shape as the driving side magnetic force joint 56 is fixed to the other end of the driven shaft 67 (see FIG. 3).
An output gear 67a is fixed to the left end). This output gear 67& meshes with an input gear (not shown) connected to the input 111169 of the rotary type vibrating electric resistor 70. The variable electric resistor 70 is disposed in the second chamber 46. The electric resistance value corresponding to the liquid level height data of the liquid in the liquid sealed container 41 is applied to the variable electric resistor 70 in an analog manner. A liquid level data processing circuit 71 is connected which processes the signal as a signal and outputs it as a liquid level signal. Variable electrical resistor 70 and liquid level data processing circuit 71
may be anything that can convert the mechanical displacement 71I'' into an electrical analog signal and output this electrical analog signal as the liquid level height; these are commercially available.
I will omit the details.

Cylindrical magnetic shields 72 and 76 are provided on both sides of the partition wall 440, and these magnetic shields 72 and 76
are the driving side magnetic force joint 56 and the driven side magnetic force joint 6, respectively.
It accommodates 8. Therefore, interference due to surrounding magnetism is avoided, and the driving side magnetic force joint 56 and the driven side magnetic force joint 6
The slippage between 6 and 6 is removed, increasing the accuracy of indication of high liquid level. Further, since the driven shaft 67 is supported by the support plate 66 via the two bearings 52, these qtB bearings 5
2, the axial play is reduced, and the result is that the output gears 6 & 3 at the other end of the driven shaft 67 and the human gear of the variable electrical resistor 70 only move slightly in the axial direction within the allowable range. No matter what, it never comes off. Therefore, the rotary slider (not shown) in the variable electric resistor 70 will not come off from the pair of contact pieces due to play in the axial direction of the driven shaft 67.

The float lateral portion 42 is connected to the belt 56 as described above.
Float 57 attached to one end of the liquid and floating on the liquid.
and a weight 58 attached to the other end of the belt 56, and also allows the float 57 to swing in the lateral direction. A fixing weight 75 is provided which is suspended from the top part 41a7 of the liquid-tight container 41 by a guide wire 74 to prevent the liquid from being damaged. The guide wire 74 passes through the float 57 in the vertical direction, so that the float 57 can move up and down accurately and freely by the guide wire 74. This makes it possible to prevent the float 57 and the weight 58 from becoming entangled with each other even when the liquid level is unstable and oscillating.

The weight 58 acts to apply appropriate tension to the belt 56 and cause the float 57 to faithfully follow the vertical movement of the liquid level.

Hereinafter, the operation of the magnetic joint type liquid level indicating device of the present invention will be explained. When the float 57 moves up and down as the liquid level changes, the upper portion of the float 57
is converted into rotation of the wheel 54 by. wheel 5
4 rotates and the driving side magnetic force joint 56 rotates, the rotation of this driving side magnetic force joint 56 is transmitted to the driven side 9Ill magnetic force joint +68 by the magnetic force that passes through the partition wall 44, and this driven side magnetic force joint 68 does not slip. Rotate. As a result, the amount of rotation of the driven shaft 67 is converted into a change in the electrical resistance value of the electrical resistor 70 at a ratio of 1 foot, and this change is input to the liquid level data processing circuit 71 as it is for each analog issue. . In this way, data on the level of the liquid in the liquid container 41 is converted into an electrical signal within the liquid level indicating device of the present invention, and this electrical signal can be transmitted to a remote location by wire or wirelessly. This allows for remote measurement of the liquid level.

According to the above-described magnetic joint type liquid level indicating device of the present invention, the float and the weight are respectively connected to both ends of the belt, and the vertical movement of the float is converted into the rotation of the wheel. There is no need to attach a goo IJk to the bottom of the unit. Therefore, it can be easily installed in any liquid container.

In addition, since the variable α resistor for processing liquid level height data and the liquid level data processing circuit are provided inside the liquid level detection mechanism, the entire magnetic joint type liquid level indicating device becomes compact3. Moreover, since the vertical movement of the float is converted into rotation by the vertical movement belt and wheel that follows the vertical movement of the liquid level, the belt is difficult to come off from the wheel.

In addition, since the belt is tightly wrapped around the wheel by the engagement of the protrusions and holes, the vertical movement of the float can be accurately converted into rotation of the wheel, and the belt can
It will not come off against the wheel.

Also, since the belt is forced to be immersed in the wheel by the abutment roller, this belt does not come off the wheel.

In addition, since the magnetic force joints on the driving side and the driven side are housed within a magnetic shield, they are not subjected to magnetic interference from the surrounding ηλ, and the rotation of the magnetic force joint on the driving side is transmitted to the magnetic force joint on the driven side without slipping.

Furthermore, since the rotation of the driven shaft is transmitted to the variable electric resistor by gear transmission, the axial movement of the driven shaft occurs only by the meshing width of the floats, and the rotor in the variable electric resistor does not come off the contact piece.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a liquid level indicating device according to the prior art, FIG. 2 is a schematic front view of a magnetic joint type liquid level indicating device previously invented by the present inventor, and FIG. 3 is a schematic front view of a liquid level indicating device according to the present invention. FIG. 4 is a vertical cross-sectional view of the liquid level detection mechanism of the magnetic joint type liquid level indicating device according to the present invention, and the vIr direction view of the magnetic joint type liquid level indicating device according to the present invention is centered on IV-IV in FIG. 3. The cross section is shown with a line. 41...Liquid sealed container, 41a...Top, 46...
・I. Uzing, 44... Bulkhead, 45... 1st chamber,
46...Second chamber, 51...Live shaft, 56...
- Active side magnetic joint, 54... Wheel, 55... Protrusion N, 56... Belt, 56a... Small hole, 57...
Float, 58...mb, 59 and 60...contact roller, 67...driven shaft, 67a...output gear, 68...driven side magnetic joint, 70...variable electric resistor, 71...Liquid level data processing circuit, 72 and 76...
・Magnetic shield.

Claims (5)

[Claims] (1) mounted on the top of a liquid container having a top;
a housing defined by a magnetically permeable partition having a first chamber and a second chamber, the first chamber communicating with the liquid container and the second chamber being sealed from the first chamber and the liquid container; a driving shaft rotatably supported in the first chamber; a wheel and a driving-side magnetic force joint disposed in the first chamber and integrally coupled to the driving shaft; a driven shaft rotatably supported in the second chamber; a driven-side output joint integrally coupled to the driven shaft; a variable electrical resistor disposed secondly and driven by the driven shaft; A liquid level data processing circuit that outputs the vertical displacement of the liquid level converted into a signal as the liquid level height, a belt wrapped around the wheel, and a belt connected to one end of this belt that outputs the vertical displacement of the liquid level converted into a signal as the liquid level height. A magnetic joint type liquid level indicating device consisting of a floating float and a weight connected to the other end of a belt. (2) The liquid level indicating device according to claim 1, wherein a number of protrusions are provided on the circumferential surface of the wheel at equal intervals in the circumferential direction, and a plurality of protrusions that fit with these protrusions are provided. A magnetic joint type liquid level indicating device that resembles a belt with a hole in it. (3) The liquid level indicating device according to claim 1 or 2, in which a contact roller is provided at a position close to the wheel for bringing the belt into close contact with the same curve of the wheel. A magnetic joint type liquid level indicating device with a % characteristic. (4) % Allowance The liquid level indicating device according to any one of claims 1 to 3, which projects from both sides of the partition into the first and second chambers, respectively, and is provided on the driving side. A magnetic joint type liquid level indicating device characterized by having a magnetic shield that accommodates the magnetic joint on the driven side. (5) The liquid level indicating device according to any one of claims 1 to 4, wherein the variable electric resistor and the driven shaft are coupled by a two-wheel transmission. A magnetic joint type liquid level indicating device featuring: