KR101562439B1 - Storage tank for shutoff of fluid leakage - Google Patents

Abstract

The present invention relates to a storage tank having a leakage preventing function that can automatically prevent leaked fluid from being introduced into the outside by automatically detecting the leakage of the fluid and isolating it from the outside.
A storage tank having a leak-barrier function according to the present invention includes: a tank main body in which a fluid is stored;
A sensing unit provided in proximity to the tank body to sense a fluid leaking to the outside of the tank body; A blocking portion provided at an upper portion of the tank body and deployed while dropping due to its own weight and surrounding the tank body; And a hermetically sealed portion that is in close contact with the lower end of the blocking portion to isolate the tank body from the outside. The blocking portion includes a support frame provided at an upper end portion of the tank body, And a closing frame provided at a lower end of the blocking film and contacting the closing part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a storage tank having a leak-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a storage tank having a leakage preventing function, and more particularly, to a storage tank having a leakage preventing function for detecting leakage of a fluid and isolating the leakage from the outside.

The liquid raw materials used in the industrial field are generally stored in a space such as a storage tank or a storage tank before being put into the process, and then supplied to the process as necessary.

The storage tank (or the storage tank) is formed as a space closed at four sides so as not to allow foreign matter to flow therein. Depending on the type of the raw material accommodated in the storage tank, damage to the storage tank may occur during continuous use, .

Hereinafter, for the sake of convenience of explanation, the problem of leakage of the raw material in the storage tank will be described as a representative example of the 'annealing step for annealing of stainless steel'.

In the process of annealing a cold-rolled coil in a stainless steel cold-rolled annealing line, the cold-rolled coil is pickled in a pickling bath to remove the oxide scale generated on the surface of the strip, and various kinds of acids are mixed in the pickling bath.

As shown in FIG. 1, the acids supplied to the pickling bath are stored in the respective storage tanks 10 before being introduced into the pickling bath, and then supplied to the pickling baths when the oxide scale is removed. At this time, ) The phenomenon that the inside is corroded gradually by the acid occurs.

Particularly, when the acid is stored in the storage tank 10, a certain space is maintained without completely filling the inside of the tank 10 in consideration of the gas generated in the acid. In the inside of the storage tank 10, (The surface of the acid solution).

The amount of acid contained in the storage tank 10 is reduced when the acid is supplied to the pickling tank, and the water level is lowered. When the water level drops below a certain level, the acid solution is supplied again to raise the water level. Is unevenly corroded.

When the degree of progress of internal corrosion increases with time, a considerable number of fine holes are formed on the inner wall of the storage tank 10, and the acid solution contained in the storage tank 10 leaks to the outside through the holes.

If the acid solution leaks to the outside, the peripheral equipment is not only corroded and damaged, but also the acid solution is colorless. Therefore, it is not recognized by the operator and the safety is threatened, and there is a problem that the cleaning water flows into the water system have.

Conventionally, it has been very difficult to detect the leakage of the acid solution. Even if the acid solution is leaked late, a considerable amount of the acid solution has leaked to the outside, so there is no other way but to carry out the repair work.

In order to solve such a similar problem, the conventional "portable leak inspection apparatus for oil storage tanks (registered patent 10-0573426)" and "fuel tank having double blocking structure (public utility model 20-1998-049860)" .

In the conventional "portable leak inspection apparatus for oil storage tank (Patent Registration No. 10-0573426) ", a gas supply unit for supplying gas for leak inspection at a predetermined pressure and a gas supply unit for selectively supplying gas supplied from the gas supply unit A gas discharge pipe portion provided so as to be discharged to the inside of the gas phase portion or the oil supply pipe formed in the uppermost layer of the liquid phase portion and the lowest face of the liquid phase portion and a gas discharge pipe portion connected to the gas discharge pipe portion, A sensing unit for sensing atmospheric pressure acting on the gas pipe at the same time as sensing a pressure change amount of the liquid portion inside and a change amount of the internal pressure of the gas phase portion or the internal pressure change of the gas pipeline, And a calculation unit for visually checking whether or not the gas, the vapor, and the oil pipeline leak, To calculate leakage amount and leakage of the liquid phase in which the oil is stored in the tank and to calculate the amount of change in the internal pressure of the gas phase portion and the oil pipeline of the tank to perform leakage inspection of the tank more quickly and accurately. The test apparatus was presented.

However, such a mobile leak detector for oil storage tanks is not able to automatically deal with the leakage of the storage tank even if it detects leakage, so that the operator always has to wait.

Further, in the conventional "fuel tank having a double shielding structure (Open Utility Model No. 20-1998-049860) ", a pair of steel plates are bent in a multi-step shape symmetrically with respect to each other, An inner passage formed with a flange portion protruding at an intermediate portion and formed with a predetermined fuel receiving space, a pair of reinforcing plates bent in a multi-step shape corresponding to the outer peripheries of the inner cylinder being wrapped with a predetermined interval, And the outer cylinder formed to be fixedly attached to the upper / lower surface of the support portion, so that it can effectively withstand the impact applied to the fuel tank in the event of a collision between the vehicles, and when any one of the outer cylinder and the inner cylinder is collapsed and broken, A fuel tank having a double shut-off structure capable of preventing accidents occurring after a collision by preventing leakage It was.

However, the fuel tank having such a double shielding structure can not be detected even if the inner cylinder is corroded by the acid solution to form holes, and when the inner cylinder is corroded and the acid solution leaks, the leaked acid between the inner cylinder and the outer cylinder can be prevented I can not.

Korean Patent No. 10-0573426 (Apr. 17, 2006) Korea public utility model 20-1998-049860 (October, 1998)

Disclosure of Invention Technical Problem [8] In order to solve such a conventional problem, the present invention provides a storage tank having a leak-barrier function that can automatically prevent leakage of a fluid, .

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a storage tank having a leakage preventing function, A sensing unit provided in proximity to the tank body to sense a fluid leaking to the outside of the tank body; A blocking portion provided at an upper portion of the tank body and deployed while dropping due to its own weight and surrounding the tank body; And a hermetically sealed portion which is in close contact with the lower end of the blocking portion to isolate the tank body from the outside. The blocking portion includes a support frame provided at an upper end of the tank body, And a closing frame provided at a lower end of the blocking film and contacting the closing part.

The shielding portion includes a support frame provided at an upper end of the tank body, a shielding film having a corrugated portion formed at an upper end thereof to be fixed to the support frame so as to be stretchable and expandable, and a tightening frame provided at a lower end of the shielding portion to be in contact with the closure .

The sealing part includes a fixing frame provided along an outer circumferential surface of the lower end of the tank body, and a seating groove is formed in the fixing frame so that the fitting frame is seated.

The sealing portion may further include a receiving frame provided between the fixed frame and the lower end of the tank main body and having receiving grooves for storing the leaked fluid therein, And a discharge port is formed in the receiving groove so as to discharge the leaked fluid.

Wherein the driving unit includes a first connection frame and a second connection frame spaced apart from each other on the support frame, and a second connection frame having a first connection frame and a second connection frame, A pair of spools rotatably connected to each other, and a rope provided along the outer circumferential surface of the spool and connected to the contact frame.

And a power unit for transmitting a driving force to the driving unit, wherein the power unit includes a third connecting frame spaced apart from the first connecting frame in the opposite direction to the second connecting frame, And a pair of driving motors respectively fixed to the pair of spools.

The driving unit includes a pair of first clutches connected to the pair of spool ends and fixed to the second connection frame, and a pair of second clutches connected to the first connection frame and the second connection frame, The power unit further includes a second clutch connected to the pair of driving motors and to be meshed with the pair of first clutches, one end of which is fixed to the third connecting frame, And a driving cylinder connected to the third connecting frame and moving the third connecting frame in the direction of the second connecting frame.

And a control unit receiving the sensing signal from the sensing unit and operating the driving cylinder and the driving motor.

The present invention has the following various effects.

First, the present invention is capable of immediate response by immediately detecting the leakage of the fluid.

Second, the present invention can prevent the leakage of fluid from the outside by automatically isolating the fluid from the outside when the fluid leaks.

Third, the present invention can secure the safety of the operator.

Fourth, the present invention can prevent environmental pollution.

Fifth, the present invention is simple in structure and easy to maintain.

1 shows a conventional storage tank,
FIG. 2 is a view showing a state in which a blocking film according to the present invention is lifted and lowered,
FIG. 3 is a view illustrating a state in which a blocking film according to the present invention is lowered.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, and the same reference numerals will be applied to the constituent elements described in the background art unless otherwise specified.

The description of the storage tank having the leak-barrier function of the present invention described below is a preferred embodiment of the present invention, and the present invention is not limited to the embodiments but can be implemented in various forms.

2, the storage tank having the leakage preventing function according to an embodiment of the present invention includes a tank body 100, a sensing unit 200, a blocking unit 300, and a sealing unit 400 do.

The tank main body 100 is a tank in which a fluid to be supplied to a post-process (including a liquid and a gas, both of which are liquids and gases, hereinafter referred to as an acid solution) It is sealed. The tank body 100 may have a top surface or a bottom surface that can be opened or closed depending on the circumstances to which the present invention is applied and may have a separate tube or hole for introducing or extracting the acid solution to the side surface of the tank body 100 have.

In the present embodiment, the shape of the tank body 100 is formed into a cylindrical shape, but the shape of the tank body 100 may be variously changed.

The sensing unit 200 may be attached to the tank main body 100 by sensing a fluid leaked to the outside through the tank main body 100 while being fixed to the tank main body 100 at a position close to the tank main body 100, It may be preferable to position the tank body 100 close to the tank body 100 in order to protect it.

The sensing unit 200 includes a fluid sensing sensor 210 and a fixing plate 220. The fluid sensing sensor 210 senses an acid solution leaking to the outside of the tank body 100 or senses a gas generated from the acid solution. The fluid sensing sensor 210 is spaced apart from the tank 100 by a predetermined distance to cover the entire area of the tank body 100, It may be preferable to surround the main body 100.

The fixing plate 220 may be provided at a position where the fluid sensing sensor 210 is fastened or extended from the tank main body 100 and may be fixed to a separate facility around the tank main body 100. However, it is preferable that the liquid sensor 210 is spaced apart from the tank body 100 by a certain distance so that the acid solution and the fluid sensor 210 do not come into direct contact with each other.

The blocking portion 300 is provided on the tank main body 100 and covers the tank main body 100 while falling down on its own weight so that the supporting frame 320, the blocking film 310, and the close- .

The support frame 320 is provided at the upper end of the tank body 100 and is provided to cover the upper end of the tank body 100 in the present embodiment. However, the support frame 320 may be provided along the outer circumferential surface of the upper end of the tank body 100. It is preferable that the support frame 320 is also provided along at least the outer circumferential surface of the upper end of the tank body 100 so that the shielding film 310 to be described later can be installed around the tank body 100.

It is also possible to surround the outer circumferential surface of the upper end of the tank main body 100 by using one support frame 320 and to be spaced apart from the outer circumferential surface of the upper end of the tank main body 100 by a plurality of support frames 320 It would be possible.

The upper end of the shielding film 310 is fixed to the support frame 320 and is raised and lowered in a direction perpendicular to the ground surface. The shielding film 310 is formed by forming a plurality of corrugations 311 so as to be stretched and fixed in a state fixed to the support frame 320 . It is preferable that the blocking membrane 310 is provided along the circumferential direction of the tank body 100 so as to surround the tank body 100 when the tank body 100 is lowered toward the ground.

The blocking film 310 is provided at the lower end of the blocking film 310 so as to be in contact with the closing part 400 described later and the blocking film 310 is deployed by the weight of the blocking frame 330 and the blocking film 310.

The sealing part 400 separates the tank body 100 from the outside by tightly contacting the blocking film 310 when the blocking film 310 is deployed and includes a fixing frame 410 and a receiving frame 430.

The lower end of the tank body 100 is provided with a fixing frame 410 along the outer circumferential surface thereof and a seating groove 420 is formed in the fixing frame 410 so that the above-described tightening frame 330 can be seated. As the seating groove 420 is formed, the tightening frame 330 is inserted into the seating groove 420 when the tightening frame 330 is lowered and deployed so that the tightening frame 330 and the fixing frame 410 closely contact each other.

It is also possible to provide a magnetic substance (not shown) in the seating groove 420 and the fixed frame 410 to improve the adhesion between the contact frame 330 and the fixed frame 410. In addition, (Not shown).

The hermetically sealed portion 400 may further include a receiving frame 430 having receiving grooves 450 formed thereon. The receiving frame 430 is provided between the fixed frame 410 and the lower end of the tank body 100 so that the acid solution does not flow into the fixing frame 410 and the seating groove 420 when the acid solution leaks through the tank body 100 So that it flows into the receiving groove 450. At this time, it is preferable that the outlet 440 is formed in the receiving groove 450 so that the introduced acid solution can be discharged to the outside, and the acid solution can be led to the outside by connecting a separate pipe to the outlet 440 Do.

Further, since the receiving frame 420 is further provided between the fixed frame 410 and the tank main body 100, the position of the receiving groove 420 is changed, so that the position of the shank film fixed to the supporting frame 320 It may be preferable to be fixed to the outer side of the outer circumferential surface of the tank body 100. [ More precisely, it is most effective to fix the seating groove 420 so that it is positioned directly below the blocking film 310.

The present invention may further include a driving unit 500 and a power unit 600.

The driving unit 500 is for lifting the contact frame 330 and the blocking film 310 again after they have fallen and developed by their own weight and then completed the repair work of the leakage area. Two connecting frames 520, a pair of spools 530, and a rope 550.

The first connection frame 510 and the second connection frame 520 are spaced apart from each other on the support frame 320 and a pair of spools 530 are rotatably provided at both ends thereof. The first connection frame 510 and the second connection frame 520 are connected to each other by the pair of spools 530 and the rope 550 is provided on the outer circumferential surface of the pair of spools 530. The rope 550 is wrapped around the spool 530. When the spool 530 rotates in one direction, the rope 550 is wound and rotated when the spool 530 rotates in the opposite direction. One end of the rope 550 is wound around the spool 530 And the other end is connected to the tightening frame 330.

That is, when the spool 530 rotates, the rope 550 is wound or unwound, whereby the tightening frame 330 is moved up and down. The other end of the rope 550 may be connected to the contact frame 330, but it is also possible to connect the auxiliary frame 340 to the contact frame 330 separately.

This is because when the rope 550 is directly connected to the tightening frame 330, the rope 550 flows between the corrugated portions 311 when the shielding film 310 is folded and folded again, It may be desirable to add or subtract accordingly.

The first connection frame 510 and the second connection frame 520 may be formed to prevent the rope 550 from being bent or bent when the end of the rope 550 and the auxiliary frame 340 or the connection frame 330 are connected to each other. May protrude outward from the fixing position of the blocking film 310 fixed to the supporting frame 320 at least.

The power unit 600 includes a third connecting frame 610, a pair of driving motors 620, and a driving cylinder 650 to transmit the driving force to operate the driving unit 500 described above.

The third connection frame 610 is spaced apart from the first connection frame 510 in the direction opposite to the second connection frame 520. A pair of driving motors 620 are respectively provided. The pair of drive motors 620 are respectively connected to the pair of spools 530 and the spool 530 is also rotated when the drive motor 620 rotates.

That is, when the pair of driving motors 620 is rotated, the spool 530 is also rotated, and the rope 550 is wound or unwound.

The driving unit 500 further includes a first clutch 540 and a rod case 560. The power unit 600 further includes a second clutch 630, a connecting rod 640, and a driving cylinder 650 .

The first clutch 540 is connected to the end of the spool 530 located on the second connecting frame 520 side and is fixed to the second connecting frame 520. Toothed surfaces of the first clutch 540 and the second connecting frame 520 are coupled with the spool 530 Rotate. The second clutch 630 is coupled to the drive motor 620 and rotates together with the drive motor 620 when the drive motor 620 rotates. The side surface of the second clutch 630 is teeth-engaged with the first clutch 540.

The provision of the first clutch 540 and the second clutch 630 between the drive motor 620 and the spool 530 makes it possible to drop the blocking film 310 and the tightening frame 330 by force alone And can drop at a high speed only by separating the second clutch 630 from the first clutch 540 when the fluid sensor 210 detects the acid solution. That is, energy can be saved and the tank body 100 can be quickly isolated from the outside. At this time, it is also possible to provide a separate shock absorber for shock absorption at the lower end of the tightening frame 330.

In addition, although not shown in the present embodiment, the drive motor 620 or the spool 530 is provided with a separate encoder to measure the number of revolutions, thereby calculating the winding or winding length of the rope 550, The length of the rope 550 may be controlled by providing a separate position sensor at the upper and lower ends of the tank main body 100 so as to control the length of the rope 550 wound or unwound.

A plurality of rod cases 560 are provided between the first connection frame 510 and the second connection frame 520. One end of the rod case 560 is connected to the first connection frame 510, 2 connection frame 520. [ An insertion groove is formed in the rod case 560, and an opening is formed at the other end of the rod case 560, and a connection rod 640, which will be described later, is inserted into the insertion groove through the opening.

The third connecting frame 610 is provided with the same number of connecting rods 640 as the rod case 560. One end of the connecting rod 640 is fixed to the third connecting frame 610 and the other end of the connecting rod 640 is inserted into the insertion groove, And is vertically moved inside the rod case 560 by the cylinder 650.

A driving cylinder 650 is spaced apart from the third connecting frame 610 and a piston rod (not shown) of the driving cylinder 650 is connected to the third connecting frame 610. As the drive cylinder 650 is connected to the third connection frame 610, the third connection frame 610 linearly reciprocates in the direction of the second connection frame 520 when the drive cylinder 650 is operated. The drive cylinder 650 may be secured to the support frame 320 or to a separate support.

It is preferable that the present invention further includes a control unit (not shown) for receiving the sensing signal from the sensing unit 200 and operating the driving cylinder 650 and the driving motor 620.

That is, when the operator finishes repairing the leaked portion and operates the control unit (not shown) to operate the drive cylinder 650 in a situation where the acid solution leaks through the tank main body 100 and the shielding film 310 is deployed, The rod (not shown) advances to linearly move the third connection frame 610 toward the second connection frame 520.

When the piston rod (not shown) of the drive cylinder 650 is in the reverse state, the first clutch 540 and the second clutch 630 are not in contact with each other. As the piston rod (not shown) The first clutch 540 and the second clutch 630 are engaged with each other. When the advancement of the piston rod (not shown) is completed, the control unit (not shown) rotates the drive motor 620 and the second clutch 630 rotates together with the rotation of the drive motor 620.

When the second clutch 630 starts to rotate, the first clutch 540 coupled to the second clutch 630 also rotates, and the spool 530 rotates accordingly. When the spool 530 is rotated, the rope 550 connected to the spool 530 is wound along the outer circumferential surface of the spool 530, and the tightening frame 330 connected to the end of the rope 550, (340) is raised.

The barrier film 310 is folded along the wrinkle portion 311 formed on the barrier film 310 when the adhesion frame 330 and the auxiliary frame 340 are lifted and the position of the adhesion frame 330 and the auxiliary frame 340 is The control unit (not shown) stops the rotation of the motor. It is also possible to attach a separate sensor to the position of the contact frame 330 and the auxiliary frame 340. The rotation speed of the driving motor 620 may be measured to determine the positions of the contact frame 330 and the sub frame 340 It is also possible to measure the elevation height.

As the piston rod (not shown) of the driving cylinder 650 advances, the blocking membrane 310 is maintained in a folded state. The sensor senses that the acid solution is leaked from the fluid sensing sensor 210, When the sensing signal is transmitted, the control unit (not shown) actuates the driving cylinder 650 to move the piston rod (not shown) backward.

3, when the piston rod (not shown) is retracted, the third connection frame 610 connected thereto is also moved in the direction opposite to the second connection frame 520, The first clutch 540 and the second clutch 630 are changed to the non-contact state. The spool 530 that is fixed without being rotated by the teeth of the first clutch 540 and the second clutch 630 (when the drive motor 620 is not rotating) is disposed between the first clutch 540 and the second clutch 530 The clutch 630 is freely rotatable because the force for fixing the clutch 630 is removed as the clutch 630 is separated from each other.

The contact frame 330, the auxiliary frame 340 and the shielding film 310 are always in a state in which they fall down to the ground due to their own weight but can not fall down by the rope 550 and their positions are fixed. The contact frame 330, the auxiliary frame 340, and the blocking film 310 are vertically dropped in the direction of the ground while being rotated.

At this time, the shielding film 310 folded by the corrugated portion 311 is expanded again so as to surround the tank main body 100. When the tightening frame 330 is inserted into the seating groove 420 formed on the fixed frame 410, The tank body 100 is isolated from the outside.

In this state, the acid solution continuously leaks until the repair of the leakage portion is completed. The acid solution thus leaked is received in the receiving groove 450 formed in the receiving frame 430, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: tank body 300:
310: blocking film 330: tight contact frame
400: sealing part 410: fixed frame
430: receiving frame 500:
530: spool 540: first clutch
600: power section 620: drive motor
630: second clutch 650: drive cylinder

Claims (8)

A tank body (100) in which a fluid is stored;
A sensing unit 200 provided in proximity to the tank body 100 to sense a fluid leaking to the outside of the tank body 100;
A blocking portion 300 provided on the tank main body 100 and deployed while dropping due to its own weight and surrounding the tank main body 100;
And a hermetically sealed part (400) which closely contacts the lower end of the cutoff part (300) to isolate the tank body (100) from the outside,
The shielding part 300 includes a support frame 320 provided at an upper end of the tank body 100 and a shielding film 310 having a corrugation part 311 formed at an upper end thereof And a tightening frame (330) provided at a lower end of the blocking film (310) to contact the closing part (400).
delete The method according to claim 1,
The sealing part 400 includes a fixing frame 410 provided along the outer peripheral surface of the lower end of the tank body 100,
Wherein the fastening frame (410) is formed with a seating groove (420) so that the fastening frame (330) is seated on the fastening frame (410).
The method of claim 3,
The sealing part 400 further includes a receiving frame 430 provided between the stationary frame 410 and the lower end of the tank main body 100 and formed with receiving grooves 450 for storing the leaked fluid,
The blocking film 310 is fixed to the outer side of the outer circumferential surface of the tank body 100 so that the tightening frame 330 and the fixing frame 410 are in contact with each other,
And a discharge port (440) is formed in the receiving groove (450) to discharge the leaked fluid.
The method according to claim 3 or 4,
And a driving part (500) for raising the tightening frame (330)
The driving unit 500 includes a first connection frame 510 and a second connection frame 520 spaced apart from the support frame 320 and a second connection frame 510. The first connection frame 510 and the second connection frame 520, A pair of spools 530 rotatably connected to both ends of the spool 530 and a rope 550 provided along the outer circumferential surface of the spool 530 and connected to the tightening frame 330, Storage tank with leak protection.
The method of claim 5,
Further comprising a power unit (600) for transmitting a driving force to the driving unit (500)
The power unit 600 includes a third connection frame 610 spaced apart from the first connection frame 510 in the opposite direction to the second connection frame 520, And a pair of drive motors (620) fixed to both ends of the spool (610) and connected to the pair of spools (530), respectively.
The method of claim 6,
The driving unit includes a pair of first clutches 540 connected to ends of the pair of spools 530 and fixed to the second connection frame 520, Further comprising a plurality of rod cases (560) connecting the connection frame (520) and having an insertion groove formed therein,
The power unit 600 includes a second clutch 630 connected to the pair of driving motors 620 and coupled to the pair of first clutches 540, (640) fixed to the first connection frame (610) and the other end positioned in the insertion groove to vertically move inside the rod case (560), and a second connection frame Further comprising a drive cylinder (650) for moving the first connection frame (610) in the direction of the second connection frame (520).
The method of claim 7,
Further comprising a control unit for receiving the sensing signal from the sensing unit (200) and operating the driving cylinder (650) and the driving motor (620).

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