KR20170025837A

KR20170025837A - Water level detecting device

Info

Publication number: KR20170025837A
Application number: KR1020150122860A
Authority: KR
Inventors: 민승기
Original assignee: 한전케이피에스 주식회사
Priority date: 2015-08-31
Filing date: 2015-08-31
Publication date: 2017-03-08

Abstract

The present invention relates to a water level detection device, comprising: a buoyancy unit having an air bladder vertically moved in accordance with variation of a water level of liquid stored inside a storage tank, and having a moving bar connected to the air bladder to vertically be moved in accordance with movement of the air bladder; a sensor unit having a sensor sensing whether or not the moving bar approaches, and installed outside the storage tank; and a fixing unit fixating the sensor unit to the storage tank. The present invention provides the water level detection device, allowing a user to easily check a water level of liquid stored in the storage tank.

Description

[0001] WATER LEVEL DETECTING DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level detecting apparatus, and more particularly to a water level detecting apparatus for detecting a water level inside a storage tank by mounting a sensor inside or outside the storage tank.

Conventionally, the water level sensing device applied to industrial facilities can be broadly divided into three types according to environmental demands: a float type, a magnetic (magnet) type, a sensor type (a capacitive type rod sensor, an ultrasonic sensor). The float method is inferior in price, low in cost, is inadequate for poor environment such as contact action, cable hardening, high temperature damage, chemical corrosion, and short life time. The magnetic (magnet) method is relatively expensive, The magnetism of the magnet may be reduced to cause a negative action, and the life of the contact point is also short. The capacitive rod sensor method is weak against chemical corrosion because it is in direct contact with the fluid. Ultrasonic method is non-contact type, which is suitable for the environmental requirements of the fluid but is problematic because the reaction rate is relatively low and the price is very high.

According to one aspect of the present invention, a sensor is disposed inside or outside a storage tank so that a user can visually recognize a liquid level stored in a storage tank with ease, It is an object of the present invention to provide a water level detecting apparatus which is easy to check and replace soundness of a detecting apparatus.

In order to achieve the above-mentioned object, as one aspect, there is provided a boil, which moves in a vertical direction according to variation of a liquid level stored in a storage tank, and a movement bar connected to the boom and moving in a vertical direction according to movement of the boom And a fixing unit for fixing the sensor unit to the storage tank, wherein the sensor unit includes a buoyancy unit for detecting the proximity of the moving bar and a sensor for detecting whether the moving bar is close to the storage tank.

As described above, according to the embodiment of the present invention, the user can easily know the level of the liquid stored in the storage tank.

In addition, according to an embodiment of the present invention, it is possible to prevent contact between the sensor and the storage liquid, thereby preventing a failure of the sensor.

1 is a perspective view of a water level detecting apparatus according to an embodiment of the present invention.
2 is a cross-sectional view of a water level detection apparatus according to an embodiment of the present invention.
3 is a perspective view of a water level detection apparatus according to another embodiment of the present invention.
4 is a perspective view of a water level detection apparatus according to another embodiment of the present invention.
5 is a cross-sectional view taken along line X1-X1 'in FIG.
6 and 7 are perspective views of a water level detecting apparatus according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the embodiments described below are suitable examples for understanding the level detecting apparatus 100 of the present invention. It should be understood, however, that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

The water level detecting apparatus 100 according to an embodiment of the present invention can detect the level of the liquid 1 (hereinafter, referred to as 'storage liquid') stored in the storage tank T, A buoyancy part 110 including a moving bar 112 connected to the ball 111 and a moving bar 112 connected to the ball 111 and moving in a vertical direction in accordance with the movement of the ball 111, And a fixing unit 130 for fixing the sensor unit 120 to a storage tank. The sensor unit 120 includes a sensor 121 for detecting the sensor unit 120 and a sensor unit 120 installed outside the storage tank.

1 to 3, the buoyancy unit 110 according to the embodiment of the present invention is configured such that when the moving bar 112 moves in the vertical direction as the level of the storage liquid changes, The water level of the inside of the storage tank can be sensed by detecting the end of the bar 112. The following description will be made with respect to each embodiment.

&Lt; Example 1 >

Referring to FIGS. 1 and 2, the buoyant portion 110 according to an embodiment of the present invention includes the bail 111 and the moving bar 112.

First, the bowl 111 may have a specific gravity smaller than that of the storage liquid, and may be provided as a material floating above the storage liquid when dipped in the storage liquid. In the drawing, the ball bearings 111 are shown in a spherical shape, but the shape is not limited thereto.

When the water level of the storage liquid is raised or lowered, the other end of the movement bar 112 is moved upward or downward along the movement direction of the boom 111, .

1 and 2, a water level detecting apparatus 100 according to an embodiment of the present invention includes a sensor unit 120 including a sensor 121 for detecting movement of the moving bar 112, Respectively. The sensor unit 120 according to an embodiment of the present invention is installed outside the storage tank so as not to be in contact with the storage liquid. Also, the sensor unit 120 includes a plurality of sensors, and the plurality of sensors are disposed apart from each other in a direction perpendicular to the plate 122. For example, the plurality of sensors 121 may be disposed at equal intervals from each other.

Here, the vertical direction means a direction in which the level of the storage liquid rises or falls, that is, a direction of gravity.

In addition, the sensor unit 120 according to an embodiment of the present invention may include a display unit for sensing the proximity of the movement bar 112 and displaying it to a user. The display means may include, for example, an LED illumination that visually informs the user whether the movement bar 112 is close or not, in which case the LED illumination may be automatically turned on when the water level rises or falls.

1 and 2, the water level detecting apparatus 100 according to an embodiment of the present invention includes a fixing unit 130 for fixing the sensor unit 120 to an upper portion of a storage tank. The fixing part 130 according to an embodiment of the present invention includes a first fixing part 131 'contacting the upper outer surface of the storage tank so as to fix the lower end of the sensor part 120 to the upper part of the storage tank, And a second fixing part 132 'which is in contact with the upper inner surface of the storage tank and disposed at the lower end of the first fixing part 131'. The first fixing part 130 and the second fixing part 130 may be coupled by fastening means such as a bolt or may be fixed to the upper surface of the storage tank by welding or the like.

A through hole may be formed in the fixing part 130 so that the moving bar 112 may be inserted and the moving bar 112 may move up and down.

Referring to FIGS. 1 and 2, the water level detecting apparatus 100 according to an embodiment of the present invention may further include a guide unit 140 for guiding the movement of the boom 111. The guide unit 140 according to an embodiment of the present invention includes a plurality of guide bars 141 and guide bar 141 fixing means for fixing the guide bars 141 at the lower end of the storage tank.

The plurality of guide bars 141 are vertically arranged such that the guide rails 111 are moved up and down without being separated from the guide 140 when the water level of the storage tank is variable, And the other side is fixed to the guide bar 141 fixing means. The plurality of guide bars 141 are spaced apart from each other so that the storage liquid can freely flow in and out between the guide bars 141 and the guide bars 141.

One side of the plurality of guide bars 141 may be coupled to the fixing part 130 along the edge of the fixing part 130 and the other side may be coupled to the fixing part of the guide bar 141.

For example, when the guide rails 111 are formed in a spherical shape, the plurality of guide bars 141 are fixed to the fixing portion 130 so that one side thereof is spaced from the fixing portion 130 along the circumference of the circle. And the other side may be fixed to the guide bar 141 fixing means so as to be spaced apart from each other around the circle at the guide bar 141 fixing means.

2, the guide bar 141 fixing means according to the embodiment of the present invention includes a fixing plate 142 to which the guide bar 141 is fixed at one side, And a length-adjustable length adjusting member 143 coupled to the bottom surface.

The length adjusting member includes a first fixing member 143a having one side engaged with the fixing plate, a second fixing member 143c having one side connected to the bottom surface of the storage tank, a second fixing member 143c coupled to the other side of the first fixing member 143a, And a connecting member 143b connecting the other side of the second fixing member 143c. The first fixing member 143a and the second fixing member 143c are screwed to the connecting member 143b to rotate the first fixing member 143a or the second fixing member 143c So that the entire length of the length adjusting member 143 can be adjusted. The length of the length adjusting member 143 connected to the guide bar 141 may be adjusted without restricting the length of the guide bar 141 so that the guide bar 141 is fixed inside the storage tank . The guide bar 141 can stably move up and down without being influenced by the speed of the fluid.

Hereinafter, the operation and effect of the first embodiment will be described.

Referring to FIG. 2, in the water level detecting apparatus 100 according to an embodiment of the present invention, when the level of the storage liquid is close to zero, that is, when storage liquid is not stored in the storage tank, The movement bar 112, which is located at the lower end of the storage tank and is connected to the boom 111, has an end located at the lowermost end of the sensor unit 120.

However, when the storage liquid is introduced into the storage tank and the water level of the storage liquid is increased, the boom 111 also ascends. The movement bar 112 is fixed to the bracket 111 at one side thereof and moves upward as the bracket 111 is lifted up and one end of the movement bar 112 is connected to a sensor disposed at the upper end of the sensor disposed at the lowermost end of the sensor unit 120 It is detected sequentially.

Therefore, the position of the boil 111 can be known from the position of the sensor sensing the end of the moving part, the position of the boil 111 can be known, and the level of the storage liquid can be known . When the sensor unit 120 includes a display unit such as an LED, the sensor unit 120 is sequentially moved from the lowermost part to the upper part by the display unit 112 ) Is displayed so that the user can know the level of the storage liquid through the display means.

When the water level of the storage liquid is lowered, on the other hand, the boil 111 immersed in the storage liquid also descends, and the moving bar 112 connected to the boil 111 also descends, It can be seen that the level of the storage liquid is lowered by the means.

The water level detection apparatus 100 according to an embodiment of the present invention provides an effect that the sensor is disposed outside the storage tank so that the sensor is not in contact with the storage liquid and thus the sensor is not damaged. In addition, the user can easily identify the level of the storage liquid through the position of the sensor.

&Lt; Example 2 >

3, the water level detecting apparatus 100 according to another embodiment of the present invention is different from that of the first embodiment in that the fixing unit 130 includes an outer case 131 disposed outside the storage tank, An inflow portion 132 connected to the lower end of the outer case 131 and connected to the storage tank to receive the storage liquid and an outflow portion 133 through which the upper end of the outer case 131 and the storage tank are connected to discharge the liquid, .

First, the outer case 131 according to an embodiment of the present invention has a hollow inside and a buoyant portion 110 is provided inside the outer case 131. At this time, the buoyancy unit 110 has the same configuration as the buoyancy unit 110 described in the first embodiment, and redundant description will be omitted. The liquid level detecting apparatus 100 of the second embodiment also has the same configuration as that of the sensor unit 120 described in the first embodiment, and redundant description will be omitted.

The water level detection apparatus 100 according to another embodiment of the present invention is configured such that when the storage liquid is introduced into the storage tank, the storage liquid flows through the inlet port 132 connecting the lower end of the outer case 131 and the storage tank, And flows into the outer case 131. In this case, the liquid level of the storage liquid in the storage liquid and the liquid level of the storage liquid in the outer case 131 are the same according to the Pascal principle.

When the storage liquid flows into the outer case 131, the blades 111 provided in the outer case 131 are lifted up and the sensor unit 120 The user can sense the position of the end of the moving bar 112 and know the position of the bail 111 in the outer case 131 by the user so that the user can check the level of the stored liquid inside the outer case 131 .

That is, in the second embodiment, the user visually confirms the level of the storage liquid introduced into the outer case 131, and not only the storage liquid level in the storage tank can be known, The sensor unit 120 detects the end position of the moving bar 112 and displays the level of the stored liquid stored in the outer case 131 to the user through the display unit So that the user can know the level of the storage liquid stored in the storage tank. The duplicated description in <Embodiment 1> will be omitted.

4 to 7, the water level detecting apparatus 200 according to another embodiment of the present invention includes a water level sensor 211 that moves in a vertical direction as the level of liquid stored in the storage tank changes, A sensing part 210 including a guide part for guiding the movement of the ball bearing 211 and a sensor 212 for sensing whether the ball bearing 211 is in close proximity to the ball bearing 211 when the ball bearing 211 moves, And a fixing unit 221 for fixing the sensing unit 210 to the storage tank, wherein a plurality of the sensing units 210 are arranged in the vertical direction.

The sensing unit 210 according to another embodiment of the present invention is different from the embodiment described in the first and second embodiments in that one sensor 212 senses one ball 211 A plurality of sensing units 210 including a guide unit for guiding movement of the sensor 212 and the bore 211 and the breech 211 are arranged in the vertical direction and when the level of the storage liquid sequentially rises, Each of the blades 211 sequentially ascends and each sensor 212 senses this.

The following description will be made with respect to each embodiment.

&Lt; Example 3 >

Referring to FIGS. 4 and 5, a plurality of sensing units 210 are arranged in the upper and lower parts of a storage tank, and the fixing unit 221 includes a plurality of sensing units 210 An upper fixing part 221a for fixing the sensing part 210 disposed at the uppermost stage to the storage tank and a sensing part 210 disposed at the lower end of the plurality of sensing parts 210 to be fixed to the bottom of the storage tank And a lower fixing part 222 for supporting the lower fixing part 222.

In the sensing unit 210 according to another embodiment of the present invention, the boom 211 is made of a material that is smaller than the specific gravity of the storage liquid and can float when it is dipped in the storage liquid.

The guide part according to various embodiments of the present invention includes a plurality of guide bars 213 surrounding the bail 211 and the plurality of guide bars 213 are formed in the guide bar A plurality of the guide bars 213 are spaced apart from each other and arranged in a vertical direction so that the ribs 211 move upward and downward along the longitudinal direction of the guide bar 213, And may be provided to flow out. Duplicate matters of the guide bar 213 described in the first embodiment will not be described.

The sensor 212 according to an embodiment of the present invention may be provided with a sensor 212 for sensing whether the buret 211 is in close proximity to the buret 211 when the buret 211 is moving, And may be hermetically sealed from the storage liquid to prevent contact.

In addition, the sensing unit 210 according to an embodiment of the present invention includes a fixing unit 221 for fixing a plurality of the sensing units 210 stacked in the storage tank in the storage tank .

In this case, referring to FIGS. 5 and 6, the plurality of stacked sensing units 210 may be connected to each other by screwing.

The fixing part 221 includes an upper fixing part 221a for fixing the sensing part 210A disposed at the uppermost end of the plurality of sensing parts 210 stacked to the storage tank, And a lower fixing part 222 for fixing the sensing part 210D disposed at the lowermost end in the storage tank 210 to the bottom of the storage tank.

The upper fixing portion 221a includes a first upper fixing member 221a contacting the upper outer surface of the storage tank and a second lower fixing member 221b contacting the upper inner surface of the storage tank, And a second upper fixing member 221b disposed on the second upper fixing member 221b. The sensing unit 210A disposed at the uppermost stage is fixed to the second upper fixing member 221b. The first upper fixing member 221a and the second upper fixing member 221b may be coupled by fastening means such as bolts or may be fixed to the upper surface of the storage tank by welding or the like.

The lower fixing part 222 is configured to fix the sensing part 210D disposed at the lowermost end to the bottom of the storage tank and includes a third fixing part 210D, which is coupled to the lower surface of the sensing part 210, A fourth fixing member 222c having one side engaged with the bottom surface of the storage tank and a connecting member 222b connecting the other side of the third fixing member 222a and the other side of the fourth fixing member 222c, ). The third fixing member 222a and the fourth fixing member 222c are screwed with the connecting member 222b to rotate the third fixing member 222a or the fourth fixing member 222c The entire length of the lower fixing part 222 can be adjusted. The description of the guide bar 213 fixing means described in the first embodiment is not repeated.

Hereinafter, the operation and effect of the third embodiment will be described.

For example, as shown in FIG. 5, four sensing units 210 are stacked from the bottom to the top, and a sensing unit 210 disposed at the bottom of the sensing unit 210 And the sensing unit 210 stacked on the first sensing unit 210D may be referred to as a second sensing unit 210C and a second sensing unit 210C stacked on the second sensing unit 210C. When the sensing unit 210 is the third sensing unit 210B and the sensing unit 210 disposed on the uppermost layer stacked on the third sensing unit 210B is the fourth sensing unit 210A, Before the storage liquid is introduced into the tank, the baffles 211 of the first to fourth sensing units 210D to 210A are not floated but are disposed at the lowermost end, Liquid is introduced into the first sensing unit 210D, and the bushes 211 are floated upwards sequentially from the first sensing unit 210D.

The water level of the storage liquid continuously rises and the temperature of the second sensing unit 210C is lowered by the second sensing unit 210C. The sensor 212 of the second sensing unit 210C senses the rise of the ball 211 of the second sensing unit 210C.

That is, when the liquid level of the storage liquid rises, the sensors 212 of the first sensing unit 210D, the sensors 212 of the fourth sensing unit 210A sequentially sense the proximity of the blades 211, It is possible to determine the level of the storage liquid flowing into the tank through the position of the sensor 212 sensing the floating of the ballast 211.

(Not shown) for displaying a sensor 212 for sensing the proximity of the blades 211 among the plurality of sensors 212 so that the user can know the water level inside the storage tank can do. The user can easily know the water level inside the storage tank through the display means.

Referring to FIG. 6, in the water level detecting apparatus 200 according to another embodiment of the present invention, the liquid stored in the storage tank flows into and out of the storage tank, and the outer case 221 ' The plurality of sensing units 210 are disposed in an outer case 221 'disposed outside the storage tank. When the liquid level stored in the storage tank is variable, the outer case 221' (211) moves in the vertical direction as the liquid flows in and out of the water level detecting device (200).

6, the water level detecting apparatus 200 according to another embodiment of the present invention is different from that of the third embodiment in that the fixing portion 221 includes an outer case 221 'disposed outside the storage tank, An inflow part 222 'connected to the lower end of the outer case 221' and a storage tank to receive the storage liquid, and an outlet part connected to the upper end of the outer case 221 ' (223 ').

First, the outer case 221 'according to an embodiment of the present invention has a hollow inside and a sensing unit 210 is provided inside the outer case 221'. Here, the sensing unit 210 has the same configuration as that of the sensing unit 210 described in the third embodiment, and redundant description will be omitted.

The water level detecting apparatus 200 according to another embodiment of the present invention may be configured such that when the storage liquid is introduced into the storage tank, the storage liquid is supplied through the inlet 222 'connecting the lower end of the outer case 221' Flows into the outer case 221 '. In this case, according to the principle of Pascal, the level of the storage liquid in the storage liquid is the same as the level of the storage liquid in the outer case 221 '.

When the storage liquid flows into the outer case 221 ', the ball 211 of the first sensing unit 210D disposed at the lowermost end in the outer case 221' floats to the first sensing unit 210 ' The sensor 212 of the second sensing unit 210C senses this and the sensor 212 of the fourth sensing unit 210A sequentially detects the second sensing unit 210C, The water level of the storage liquid can be known by the proximity of the storage tank 211.

Referring to FIG. 7, the sensor 212 may be provided in a plurality of vertical directions outside the outer case 221 '. In this case, since the sensor 212 is completely disconnected from the storage liquid, it is possible to prevent the failure of the sensor 212 due to the storage liquid.

100: Water level detection device 110: Buoyancy part
111: Breech 112: Moving Bar
120: sensor unit 130:
131: outer case 132: inlet
133: outlet part 210: sensing part
211: Breech 212: Sensor
213: Guide Bar

Claims

A buoyant portion including a breech that moves in a vertical direction as the level of the liquid stored in the storage tank varies and a moving bar connected to the breeze and moving in a vertical direction according to the movement of the breeze;
A sensor unit including a sensor for detecting proximity of the moving bar and installed outside the storage tank; And
And a fixing unit fixing the sensor unit to the storage tank.

The method according to claim 1,
The sensor unit includes:
Wherein the plurality of sensors are disposed apart from each other at a predetermined interval in the vertical direction.

3. The method of claim 2,
The sensor unit includes:
And display means for displaying to the user whether or not the moving bar is close to the moving bar in proximity to the moving bar.

The method according to claim 1,
The fixing unit includes:
And a through hole is formed in the inside of the storage tank so that the moving bar moves in the vertical direction.

5. The method of claim 4,
The buoyancy portion
Wherein the float floats in the liquid stored in the storage tank and the moving bar is inserted into the through hole and moves in the vertical direction according to the liquid level of the liquid.

6. The method of claim 5,
And a guide portion disposed inside the storage tank and having a plurality of guide bars fixed to the fixing portion at one side so as to guide the movement of the buoyancy portion.

The method according to claim 6,
The guide portion
And a guide bar fixing means for fixing the guide bar on one side and the bottom side of the storage tank on the other side.

8. The method of claim 7,
Wherein the guide bar fixing means comprises:
And a length adjusting member which is adjustable in length by connecting the fixing plate to the bottom surface of the storage tank.

3. The method of claim 2,
Wherein the fixing portion includes an outer case disposed outside the storage tank through which liquid stored in the storage tank flows in and out, and the buoyancy portion is provided inside the outer case.

10. The method of claim 9,
The fixing unit includes:
And an outlet for connecting the lower end of the outer case and the storage tank to allow the liquid to flow out. The apparatus according to claim 1, .

11. The method of claim 10,
And a guide portion including a plurality of guide bars connecting the upper surface and the lower surface of the outer case to guide the movement of the buoyancy portion.

A sensing unit including a bore that moves in a vertical direction as the level of the liquid stored in the storage tank changes, a guide unit that guides the movement of the bore, and a sensor that detects proximity of the bore when the bore moves. And
And a fixing unit fixing the sensing unit to the storage tank.

13. The method of claim 12,
The sensing unit includes:
Wherein a plurality of the water level detecting devices are arranged in a vertical direction.

14. The method of claim 13,
The sensing unit includes:
Wherein the sensor is disposed on the upper portion of the boom, and the sensor is sealed so as not to contact the liquid stored in the storage tank.

14. The method of claim 13,
The sensing unit includes a plurality of sensing units arranged vertically in the storage tank. The sensing unit includes an upper fixing unit for fixing the sensing unit disposed at the uppermost end of the plurality of sensing units to the storage tank, And a lower fixing part fixing the part to the bottom of the storage tank.

16. The method of claim 15,
The lower fixing part
And the length of the water level detecting device is adjustable.

14. The method of claim 13,
The fixing unit includes:
Wherein the liquid stored in the storage tank flows out and is disposed outside the storage tank and includes an outer case,
The plurality of sensing units are disposed in an outer case disposed outside the storage tank, and when the liquid level stored in the storage tank is variable, the flow moves in the vertical direction as the liquid flows in and out of the outer case To be detected.

18. The method of claim 17,
The fixing unit includes:
Further comprising an inlet for connecting the lower end of the outer case to the storage tank and for introducing the liquid, and an outlet for connecting the upper end of the outer case to the storage tank and allowing the liquid to flow out.

19. The method of claim 18,
Wherein the plurality of sensors are disposed at positions corresponding to the respective sensing units outside the outer case.