KR101499411B1 - Overflow discharge apparatus for tank-lorry - Google Patents

Abstract

An overflow cut-off device for a tank lorry is disclosed. An overflow cut-off device for a tank liner according to the present invention is mounted on an upper plate of a storage tank and discharges vaporized oil therein. The overflow cut-off device is attached to the upper plate, has an air supply port formed on one side thereof, A body to which a valve seat on which a disk is seated is formed and to which a lot to be lifted or lowered is coupled; A housing coupled to an upper portion of the body and having a working hole through which a steam exhaust pipe is connected to one side wall and a disk shaft is coupled to a central portion of the housing; A disk coupled to a lower portion of a disk shaft coupled to an operating hole of the housing; A cylinder cap coupled to an upper portion of the housing; A piston coupled to an inner circumferential surface of the cylinder cap and operated to move up and down; And an automotive end device that is raised by buoyancy to generate an alarm and stop the oil supply pump.

Description

[0001] OVERFLOW DISCHARGE APPARATUS FOR TANK-LORRY [0002]

More particularly, the present invention relates to an overflow preventing device for a tank lorry, which is mounted on an upper part of a storage tank of a tank lorry, discharges vapor in a storage tank to prevent an excessive increase in internal pressure, The overflow shutoff device for a tank lorry is configured to shut off the ground line of the ship at the time of overfilling the oil to overflow the ship, thereby temporarily stopping the ship pump.

Generally, a tank for transporting oil or chemical chemicals forms an opening in an inner space of a storage tank, a limit display point for indicating a maximum loading capacity is formed inside the opening, The valve is equipped with a refueling valve.

Therefore, the oil supply valve can be supplied or discharged from the oil supply pipe under the storage tank, and the oil supply valve is opened and closed by the power generating means provided in the tank according to the operation of the control valve formed at the upper portion of the storage tank.

However, in the case of the conventional tank lorry, the operator directly climbs the upper part of the tank, and opens the lid of each opening, regardless of whether the metering device on the side of the supply device (not shown) It is not only inconvenient to operate the control switch and the vent valve after visually confirming that the contents are supplied to the gauge bar formed in the inside, but also there is a risk of explosion and fire when the flammable substance such as oil is loaded In case of toxic chemicals, vaporized chemicals are released into the atmosphere, causing environmental pollution and exposed workers to toxic substances. On the other hand, the gauge bar displays only the maximum load capacity, thereby confirming the correct amount of load There were also problems.

In order to solve the problems of the conventional tank lorry, the configuration of the gauges for tank lorries such as the utility model registration No. 365399 (issued on October 22, 2004) and No. 378860 (issued on March 16, 2005) Even in the above case, the inconvenience of the driver climbing to the upper part of the tank lorry to check the load amount and operating the control switch has not been solved.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art, and it is an object of the present invention to provide a fuel cell system, which is mounted on a storage tank in which oil is stored, discharges vapor in a storage tank, And an object of the present invention is to provide an overflow shutoff device for a tanker which is capable of automatically shutting off an inflow valve during injection, operating a warning device, shutting off a grounding line at the time of shipment,

It is an object of the present invention to provide an air conditioner which is attached to an upper plate of a storage tank and discharges vapor of an inside of the storage tank to block an overflow and which is attached to the upper plate and has an air supply port formed on one side, A body having a central portion formed with a valve seat on which a disk is seated, a groove formed in a center portion of the valve seat, and a working hole through which the robot ascends and descends; A housing coupled to an upper portion of the body and having a working hole through which a steam exhaust pipe is connected to one side wall and a disk shaft is coupled to a central portion of the housing; A disk coupled to an operating hole of the housing, a disk coupled to a lower portion of the disk shaft, a spring coupled to an outer surface of the disk shaft and supported by the disk, A cylinder cap coupled to a housing cover coupled to an upper portion of the housing, a cylinder cap having a pneumatic inlet through which a working air pressure is introduced and a pneumatic outlet formed through the upper portion; A piston coupled to the inner circumferential surface of the cylinder cap and coupled to an upper end of the disk to move up and down; And an overhead shut-off device for shutting off the oil supply pump by raising an alarm by buoyancy when the oil level is above the danger level in the storage tank.

The vehicle end fitting includes: a tubular body coupled to a lower portion of the housing, the tubular body having a lower end opened to form a vapor inflow hole at one side; And a float which is coupled to the inside of the tubular body and is lifted and lowered by a buoyant force and whose upper end is in close contact with the lower end of the lot.

A magnet is formed on an upper portion of the float, and an iron plate is formed at a lower end of the lot, so that the magnet can be adhered to each other.

Wherein the body is provided with an air supply passage communicating with the air supply port and communicating with one side of the operation hole, and an exhaust passage communicating with the other side of the operation hole and communicating with the air discharge port, wherein the valve seat is formed with a plurality of through holes .

Wherein the lot has a circular rod shape having a predetermined length and is formed with a concave recessed portion on a part of an outer circumferential surface thereof, the working hole of the body is formed with an air supply flow passage communicating with the air supply flow passage, And the recessed portion of the lot is formed to have a length that can be simultaneously communicated with the air supply flow passage and the exhaust flow passage hole.

A plurality of pressing rods passing through the valve seat of the body are formed on the disk and the end portions of the plurality of pressing rods are brought into contact with the upper end of the float so as to push the float downward when the disk is lowered, .

One end of a discharge pipe is connected to the air discharge port and the other end of the discharge pipe is connected to an emergency control device so that the emergency control device is operated by the air discharged through the air discharge port.

The emergency control device includes a plunger having therein a ground terminal to which electricity flows so that the plunger is lifted when the air is introduced from the discharge pipe, and the ground terminal is separated from the plunger. And a control unit for generating an alarm by receiving a separation signal of the ground terminal of the sensor and stopping the oil supply pump.

According to the present invention, it is possible to facilitate the injection by discharging the vapor present in the storage tank when the oil is injected, to prevent the risk of an explosion accident, and to prevent the overflow of the oil, The safety is improved by automatically shutting off the valve and activating the warning device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an installation example of an overflow cutoff device for a tank lorry according to an embodiment of the present invention;
2 and 3 are cross-sectional views illustrating the operation of an overflow shutoff device for a tank lorry according to one embodiment of the present invention,
FIG. 4 and FIG. 5 are cross-sectional views illustrating the operation of an 'automotive single-ended apparatus' in an overflow shutoff apparatus for a tank liner according to an embodiment of the present invention;
6 is a view showing an example of installation of an overflow cut-off device for a tank lorry according to another embodiment of the present invention,
7 to 10 are sectional views sequentially showing the operation of the overflow shutoff apparatus for a tank lorry according to another embodiment of the present invention.

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

In describing the present invention, a tank lorry for storing oil will be mainly described to facilitate understanding. It should be noted, however, that it is not necessarily limited to oil and may also be applied to tank lorries charging other types of gases or liquids.

[First Embodiment]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an installation example of an overflow cutoff device for a tank lorry according to an embodiment of the present invention;

2 and 3 are cross-sectional views illustrating the operation of an overflow shutoff device for a tank lorry according to one embodiment of the present invention,

FIGS. 4 and 5 are cross-sectional views illustrating the operation of an 'automotive single-ended apparatus' in an overflow shut-off apparatus for a tank liner according to an embodiment of the present invention.

1 to 5, an overflow cut-off device A1 according to an embodiment of the present invention includes:

Is mounted on the top plate (T-1) of the storage tank (T-1), discharges the internal vapor and blocks the overflow,

An air outlet L1 is formed on one side of the upper plate T-1 and an air outlet L2 is formed on the other side of the upper plate T-1. A valve seat 12, A body 1 in which a groove 13 is formed in the central portion of the valve seat 12 and an operation hole 14 to which a lot 6 ascended and descended in the groove 13 is engaged is formed;

A housing 2 coupled to an upper portion of the body 1 and having a steam exhaust pipe 22 connected to one side wall thereof and an operation hole 24 to which a disk shaft 23 is coupled at a central portion thereof;

A disk shaft 23 coupled to the operating hole 24 of the housing 2;

A disk 3 connected to the lower portion of the disk shaft 23;

A spring S coupled to an outer surface of the disk shaft 23 and supported by the disk 3;

A cylinder cap 4 coupled to a housing cover 25 coupled to an upper portion of the housing 2 and having a pneumatic inlet 42 into which a working air pressure is introduced and a pneumatic outlet 44 in an upper portion;

A piston 5 coupled to the inner circumferential surface of the cylinder cap 4 so as to be coupled to the upper end of the disk 3 and operated to move up and down;

(E) which is raised by buoyancy to generate an alarm and stops the oil feed pump (P) when the oil level is above the danger level in the storage tank (T);

.

The body 1 has a lower end inserted into the installation hole formed in the upper plate T-1 of the storage tank T and an outer peripheral surface of the lower end welded to the upper plate T-1, And a valve seat 12 is formed so as to be recessed in a circular shape so as to seat the disk 3 on the upper surface of the valve seat 12 A groove 13 to which the lot 6 is coupled is formed at the center of the groove 13 and an operation hole 14 having a predetermined length is provided on the bottom surface of the groove 13, .

The body 1 is provided with an air supply passage 18 that communicates with the air supply port L1 and communicates with one side of the operation hole 14 and an air supply passage 18 that communicates with the other side of the operation hole 14 and communicates with the air discharge port L2 An exhaust flow path 19 is formed.

An air supply passage hole 180 communicating with the air supply passage 18 is formed in the lower portion of the operation hole 14 of the body 1 and an exhaust passage hole 190 communicating with the exhaust passage 19 is formed in the upper portion do.

A plurality of through holes 122 are formed in the valve seat 12 to allow the vapor to pass therethrough.

The lot 6 is formed in a circular bar shape having a predetermined length and is inserted into the operation hole 14 and tightly attached to the O-ring 142 formed on the inner circumferential surface of the operation hole 14 to have airtightness. A recessed portion 63 is formed.

It is preferable that the recessed portion 63 of the lot 6 is formed to have a length that can be simultaneously communicated with the air supply flow path hole 180 and the exhaust flow path hole 190.

That is, the outer circumferential surface of the lot 6 is blocked so that the supply air flow hole 180 is blocked in a state where the lot 6 is lowered.

The air in the air supply port L1 can be introduced through the air supply flow path hole 180 by allowing the recessed portion 63 to be positioned in the air supply flow path hole 180 when the lot 6 ascends, Is exhausted to the air discharge port (L2) through the exhaust flow passage hole (190).

The air thus exhausted acts on the working pressure of the automobile stage device E to be described later.

The housing 2 is coupled to the upper portion of the body 1 and comprises a cylindrical side wall 29 and a housing cover 25 coupled to the upper side thereof.

A steam exhaust pipe 22 is connected to the one side wall 29 to discharge the internal vapor to the outside and an operation hole 24 to which the disk shaft 23 is coupled is formed in the housing cover 25.

The disk 3 is connected to the lower portion of the disk shaft 23 coupled to the operating hole 24 of the housing 2 and is in close contact with the valve seat 12 to perform a closing action or to separate from the valve seat 12, So that the vapor is discharged to the vapor pipe (22).

And a spring S coupled to the outer surface of the disc shaft 23 and supported by the disc 3 is provided.

The cylinder cap 4 is attached to the housing cover 25 coupled to the upper portion of the housing 2 and has a cap shape. The cylinder cap 4 has a pneumatic inlet 42 through which an operating air pressure is introduced, (44) are formed.

The piston 5 is engaged with the inner circumferential surface of the cylinder cap 4 and is coupled to the upper end of the disk 3 to be moved up and down to thereby control the opening and closing operation of the disk 3, Can be controlled by the introduction of air pressure through the pneumatic inlet 42 of the cylinder cap.

On the other hand, the vehicle end device E includes a tubular body 7 coupled to a lower portion of the housing 2, having a vapor inflow hole 70 formed at one side thereof and a lower end opened; And a float (8) coupled to the inside of the tubular body (7) and lifted by a buoyant force and whose upper end is in close contact with the lower end of the lot (6).

The tubular body 7 is a cylindrical pipe. The tubular body 7 is coupled to a trough 17 formed at a lower portion of the body 1 and has a lower end opened to insert the float 8 therethrough.

The lower end of the lot 6 protrudes further than the lower portion of the body 1 and the iron plate 64 is attached to the lower end of the protruded lot 6.

A magnet 83 is formed on the float 8 so as to be adhered to the iron plate 64 formed at the lower end of the lot 6.

When the float 8 is raised by the buoyant force and reaches the range of the magnetic force, the float 8 abruptly rises and is adhered to the iron plate 64 of the lot 6. At this time, .

As described above, when the lot 6 rises, the air in the air supply flow path 18 flows into the exhaust flow path 19 through the recessed portion 63 and acts as an operating power for the emergency control device.

On the other hand, on the disk 3, a plurality of pressing rods 36 passing through the valve seat 12 of the body 1 are formed.

The ends of the plurality of pressing rods 36 are brought into contact with the upper end of the float 8 and the float 8 is pushed downward when the disk 3 is lowered by the elastic restoring force of the spring S, 6).

One end of a discharge pipe (not shown) is connected to the air discharge port L2. The other end of the discharge pipe is connected to the emergency control device, and the emergency control device is operated by the air discharged through the air discharge port L2.

The emergency control device includes a plunger 92 formed therein with a ground terminal 93 contacting to flow electricity. When the air is introduced from the discharge pipe, the plunger 92 is raised to separate the ground terminal 93 A detector 9; And a control unit 300 for receiving an alarm signal from the ground terminal 93 of the detector 9 to generate an alarm and stopping the oil supply pump P. [

Therefore, when the detector 9 is operated, the alarm generation and the stoppage of the oil supply pump P can stop the excessive supply of oil, and the operator can take follow-up action, thereby eliminating the risk of the accident.

The operation of the embodiment of the present invention will be described below.

As shown in FIG. 2, when the vapor pressure rises above a predetermined pressure, the disc 3 is pushed up through the through hole 122 and then discharged to the outside through the vapor discharge pipe 22.

3, the height of the internal oil is raised to raise the float 8, and the float 8 is raised with a strong force by the adhesion between the magnet 83 and the iron plate 64, (36).

 Air is then introduced into the air supply port L1 and exhausted to the air outlet L2 via the recessed portion 63 of the lot 6.

The exhausted air is supplied to the sensor 9 to raise the plunger 92. Therefore, the ground terminal 93 is separated and an alarm is generated, so that the oil supply pump P is stopped.

5, when the height of the internal oil is lowered, the disk 3 descends due to the elasticity of the spring S and is seated in the valve seat 12, and the air supply port L1 and the lot The plunger 92 of the detector 9 is lowered to become the standby state.

And the pressing rod 36 connected to the disc 3 is returned to its original state by pushing down the float 8.

[Second Embodiment]

FIG. 6 is a view showing an example of the installation of an overflow shutoff device for a tank liner according to another embodiment of the present invention, and FIGS. 7 to 10 are views showing an overflow shutoff device for a tank liner according to another embodiment of the present invention. And Fig.

6 to 10, an overflow shutoff device A2 for a tank lorry according to another embodiment of the present invention is attached to an upper plate T-1 of a storage tank T, And an air outlet L2 is formed on the other side of the air inlet L1 and an operation hole 110 in which the lot 400 is coupled to the air outlet L1, A body 100 having an exhaust passage 130 for connecting the air supply passage 120 and the air discharge port L2 connecting the body 100 to the body 100, And a third air supply passage (120) communicating with the air supply flow path (120). The air supply duct (120) is connected to the lower end of the body (100) A lower body 300 formed with a lot hole 310 in which a lot 400 is inserted and an iron plate 320 attached to a lower end of the lower body 300, A lot 400 inserted into the lot hole 310 of the body 300 and inserted into the operation hole 110 of the body 100 and brought into contact with the float 500 to be lifted and lowered, A float 500 connected to the upper part of the body 1 and restraining the ascending of the lot 400 to block the rising of the float 500 when traveling to the empty tank An overflow shut-off valve (A2-1) including an overflow shutoff valve (A2-1); Which is connected to the air outlet port L2 of the body 100 of the overflow shut-off valve A2-1 to stop the oil supply pump P in the outflow when the oil level is above the danger level in the storage tank T, And a sensor A2-2.

A magnet 510 is formed on the upper surface of the float 500 and an iron plate 320 is formed on the lower surface of the lower body 300 to correspond to the magnet 510.

Accordingly, when the float 500 ascends and enters the magnetic field, the magnet 510 accelerates the magnetic flux by the magnetic force, and the magnet plate 510 and the iron plate 320 are adhered to each other, and the adhered state can be firmly maintained.

The locking device 600 is for restricting the operation of the float 500 so that the float 500 is not raised unintentionally even if a vibration or an impact is generated while the storage tank T is empty.

A hollow portion 613 is formed in the upper portion of the body 100 and a cap 611 is coupled to the upper portion and a rod groove 614 is formed in the lower portion. Air holes 612 are formed in one upper portion, A housing 610 having a second air supply passage 615 communicating with the air supply passage 120;

A rod 640 inserted into the rod groove 614 and a piston 620 coupled to an upper end of the rod 640 and brought into close contact with an inner circumferential surface of the hollow portion 613 of the housing 610 to move up and down;

A spring 630 inserted into the housing 610 to press the piston 620;

.

6, air is supplied through the air hole 612 to lower the piston 620, the rod 640 connected to the piston 620 descends and the lower end of the rod 640 descends from the upper end of the lot 400 So that the float 500 and the lot 400 can be prevented from rising.

The over-full sensor A2-2

A plunger 92 having a ground terminal 93 contacting with an electric current flows is formed inside so that when the air flows in from the air outlet L2, the plunger 92 is raised to separate the ground terminal 93 And a detector (9).

The operation of another embodiment of the present invention will now be described.

7, air is supplied through the air hole 612 to lower the piston 620 while the rod 640 connected to the piston 620 descends, and the lower end of the rod 640 moves downward, The upper end of the float 400 and the lot 400 are suppressed.

As shown in FIG. 8, when filling the storage tank T with oil, the locking device 600 is first disengaged.

That is, the supply of air through the air hole 612 is stopped, air is supplied through the air supply port L1, the piston 620 is raised, the spring 630 is compressed, and the rod 640 is also raised The pressurized state for the lot 400 is released.

9, when the oil is filled in the storage tank T and then raised to a certain level or more, the float 500 is raised by the buoyant force and adhered to the iron plate 320 of the lower body 300, 400).

As the lot 400 is raised, the air supply passage 120 and the concave groove 410 of the lot 400 are communicated with each other and the air introduced into the air supply port L1 flows through the concave groove 410 into the exhaust passage 130 To the air outlet L2.

Air conveyed to the air outlet L2 is introduced into the over-pool sensor A2-2 via the conduit N.

When air flows from the air outlet L2, the plunger 92 is lifted and the ground terminal 93 is separated.

When the separation signal of the ground terminal 93 is generated, the oil supply pump P in the outgoing direction is stopped.

Then, as shown in FIG. 10, once the filling material is fully charged in the storage tank T, the locking device 600 is operated again to restrain the float 500 from rising.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

1: Body 2: Housing
3: Disk 4: Cylinder cap
5: Piston 6: Lot
7: Tubular body 8: Float
9: Detector 12: Valve seat
14: Operation hole 18: Supply air flow
19: exhaust channel 63:

Claims (12)

Is mounted on the top plate (T-1) of the storage tank (T-1), discharges the internal vapor and blocks the overflow,
An air outlet L1 is formed on one side of the upper plate T-1 and an air outlet L2 is formed on the other side of the upper plate T-1. A valve seat 12, A body 1 in which a groove 13 is formed at the central portion of the valve seat 12 and an operation hole 14 to which the lot 6 ascended and descended is coupled is formed;
A housing 2 coupled to an upper portion of the body 1 and having a steam exhaust pipe 22 connected to a side wall thereof and having an operation hole 24 to which a disk shaft 23 is coupled at a central portion thereof;
A disk shaft 23 coupled to the operating hole 24 of the housing 2, a disk 3 connected to the lower portion of the disk shaft 23, 3);
A cylinder cap 4 coupled to the housing cover 25 coupled to the upper portion of the housing 2 and having a pneumatic inlet 42 through which a working air pressure is introduced and a pneumatic outlet 44 formed at an upper portion thereof;
A piston 5 coupled to the inner circumferential surface of the cylinder cap 4 so as to be coupled to the upper end of the disk 3 and operated to move up and down;
(E) which is raised by buoyancy when the oil level is above the danger level in the storage tank (T);
, ≪ / RTI &
The vehicle end device (E)
A tubular body 7 coupled to a lower portion of the housing 2 and having a vapor inflow hole 70 formed at one side thereof and a lower end thereof opened;
A float 8 coupled to the inside of the tubular body 7 and lifted by a buoyant force and having an upper end closely fitted to the lower end of the lot 6;
Lt; RTI ID = 0.0 > 1, < / RTI > delete The method according to claim 1,
Wherein a magnet (83) is formed on an upper portion of the float (8), and an iron plate (64) is formed on a lower end of the lot (6) so as to be adhered to each other. The method according to claim 1,
The body 1 is provided with an air supply passage 18 communicating with the air supply port L1 and communicating with one side of the operation hole 14 and an air discharge port L2 communicating with the other side of the operation hole 14, And an exhaust passage 19 communicating with the exhaust passage 19,
Wherein the valve seat (12) is formed with a plurality of through holes (122) to allow the vapor to pass therethrough. 5. The method of claim 4,
The lot (6) is formed with a recessed portion (63) concave on a part of its outer circumferential surface,
An air supply passage hole 180 communicating with the air supply passage 18 is formed in the operation hole 14 of the body 1 and an exhaust passage hole 190 communicating with the exhaust passage 19 is formed at an upper portion Lt; / RTI &
Wherein the recessed portion (63) of the lot (6) is formed to have a length that can be simultaneously communicated with the air supply flow path hole (180) and the exhaust flow path hole (190). The method according to claim 1,
A plurality of pressing rods (36) penetrating the valve seat (12) of the body (1) are formed on the disk (3)
The ends of the plurality of pressing rods 36 are brought into contact with the upper end of the float 8 and the float 8 is pushed downward by the elastic restoring force of the spring S when the disk 3 is lowered, Wherein the overflow blocking device is configured to prevent the overflow from occurring. The method according to claim 1,
One end of a discharge pipe is connected to the air discharge port L2 and the other end of the discharge pipe is connected to an emergency control device so that the emergency control device is operated by the air discharged through the air discharge port L2 Overflow blocking device. 8. The method of claim 7,
The emergency control device includes:
A plunger 92 having a ground terminal 93 contacting with the electricity to flow therethrough is formed inside and the plunger 92 is lifted up when the air is introduced from the discharge pipe so that the ground terminal 93 is separated from the sensor 9 )Wow;
A controller 300 for receiving an alarm signal from the ground terminal 93 of the detector 9 to generate an alarm and stopping the oil supply pump P;
Lt; RTI ID = 0.0 > 1, < / RTI >
An air outlet L1 is formed on one side and an air outlet L2 is formed on the other side of the storage tank T and an operation A body 100 in which a hole 110 is formed and an exhaust passage 130 connecting the air supply passage 120 connecting the air supply port L1 with the operation hole 110 and the air discharge port L2 is formed, ,
A tubular body 200 coupled to a lower portion of the body 100 and vertically disposed inside the storage tank T and having a hollow therein,
A third air supply passage 390 is formed in the inner part of the body 200 and connected to the lower end of the body 100. The third air supply passage 390 communicates with the air supply passage 120. A lower body 300 in which a lot hole 310 is formed and an iron plate 320 is attached to a lower end thereof,
A lot 400 which is inserted into a lot hole 310 of the lower body 300 and is engaged with the operation hole 110 of the body 100 to be raised and lowered in contact with the float 500,
A float 500 inserted into the tube 200 and raised by buoyancy of the fluid,
An overflow shutoff valve A2-1 which is coupled to an upper portion of the body 100 and includes a locking device 600 for blocking an upward movement of the float 500 when the lot 400 is moved up to the empty tank, ;
Which is connected to the air outlet port L2 of the body 100 of the overflow shut-off valve A2-1 to stop the oil supply pump P in the outflow when the oil level is above the danger level in the storage tank T, Sensor A2-2;
Lt; RTI ID = 0.0 > 1, < / RTI > 10. The method of claim 9,
The locking device (600)
A hollow portion 613 is formed in the upper portion of the body 100 and a cap 611 is coupled to the upper portion and a rod groove 614 is formed in the lower portion. Air holes 612 are formed in one upper portion, A housing 610 having a second air supply passage 615 communicating with the air supply passage 120;
A rod 640 inserted into the rod groove 614 and a piston 620 coupled to an upper end of the rod 640 and brought into close contact with an inner circumferential surface of the hollow portion 613 of the housing 610 to move up and down;
A spring 630 inserted into the housing 610 to press the piston 620;
Lt; RTI ID = 0.0 > 1, < / RTI > 10. The method of claim 9,
The over-full sensor A2-2,
A plunger 92 having a ground terminal 93 contacting with an electric current flows is formed inside so that when the air flows in from the air outlet L2, the plunger 92 is raised to separate the ground terminal 93 Characterized in that it comprises a detector (9). 10. The method of claim 9,
Wherein a magnet (510) is formed on an upper surface of the float (500), and an iron plate (320) is formed on a bottom surface of the lower body (300) to correspond to the magnet (510).

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