KR100899979B1 - System for oil tank leak inspecting - Google Patents

Abstract

A leakage test system of an oil storage tank is provided to prevent the damage of an elastic rubber piece by laminating a hard rubber layer and a soft rubber layer at both sides of a ring-type elastic rubber piece of a pipe closing unit. A leakage test system of an oil storage tank is composed of a pipe closing unit(1400) for closing a pipe, a pressed fluid generating unit(1300) providing a pressed fluid to the inside of the oil storage tank, a temperature sensor(1200) which is mounted on the specific pipe closing unit to detect the temperature within the oil storage tank, and a detection recording unit(1100) indicating the detected temperature. A bolt member of the pipe closing unit is successively combined to a ring-type elastic rubber piece and a ring type pressing unit. The pipe closing unit is composed of a hard rubber layer and a soft rubber layer. Piezoelectric resistance pressure sensors are formed in the detection recording unit.

Description

Leak Inspection System for Oil Storage Tanks {SYSTEM FOR OIL TANK LEAK INSPECTING}

The present invention relates to a leak inspection system of an oil storage tank, and more particularly, to inspect a plurality of openings formed on the oil storage tank at a time, so that the inspection can be performed very quickly, thereby minimizing the operation restriction of the gas station. As the pressure sensor provided for pressure detection is built into the portable detection recording unit, the damage can be prevented, and accurate detection can be performed without being influenced by external factors such as vibration and shock, thereby increasing the reliability of the inspection. In addition to simply displaying and printing the test results and providing them as electronic data through download and communication, it can provide increased convenience in processing the test results. The performance and usability of the pipe closure are also greatly increased. In this regard, the present invention relates to a leak inspection system of an oil storage tank that can provide high inspection accuracy and ease of inspection.

Generally, oil storage tanks are used to store oil or chemicals at gas stations or factories, and are installed to be buried underground in consideration of safety.

If the oil storage tank leaks due to corrosion or cracking, it may cause serious soil contamination and groundwater contamination, so leak inspection periodically for the oil storage tank and the pipes connected to it. Is carried out.

Leakage inspection is a specific soil pollution control facility under the Soil Environment Conservation Act. When the number of years after installation reaches 10 years or more, it is a inspection that regularly checks with a specialized soil-related organization to see whether contaminants are leaking from the facility. Say.

Leak inspection is largely divided into direct methods such as non-destructive testing, and indirect methods such as liquid level measurement, unpressurized or unpressed, and pressurized.

In the direct method, the tank to be inspected is emptied and cleaned and inspected by the inspector directly into the tank to perform a magnetic flaw test (MT), a penetration flaw test (PT), visual inspection and ultrasonic thickness measurement to check for defects and leaks. As a method, safety accidents may occur as the inspector is directly input, and the inspection may take a very long time.

Liquid level measurement is an inspection method that checks for leaks by precisely detecting the level change of the liquid level with the measuring equipment while filling the storage tank with more than 60% of the contents.

The unpressurization method or the unpressurization method is a test method to check whether there is an abnormality in the space of the gas phase part (gas state area) while the tank is filled, and pressurize or depressurize to the test pressure after closing all the openings of the connected pipe. It is a test | inspection method which determines whether a leak is carried out by confirming the pressure change during holding time.

The pressurization method is a test method that determines whether there is a leak by closing all the openings after completely emptying the tank, pressurizing the entire tank to the test pressure, and then checking the pressure change during a constant holding time.

The unpressurized, decompressed and pressurized methods all apply pressure to the inside of the tubular opening formed directly on the oil storage tank or the tubular opening formed through the pipe connected to the oil storage tank. Pressure is commonly used as a test method for detecting a change in pressure over time to determine leakage when the change in pressure exceeds a set change range.

The prior art related to the inspection system used to perform the leak test for the oil storage tank using the pressure is the "leak inspection system of oil storage tank" of Korean Utility Model Publication No. 20-2008-0002624, The technique will be described below with reference to FIGS.

The leak inspection system 100 (hereinafter, referred to as a 'leak inspection system') of an oil storage tank according to the related art includes a temperature sensor 110 for detecting a temperature in the oil storage tank 200, and an oil storage tank 200. The digital signal output from the pressure sensor 120 for detecting the pressure in the), the converter 132a for converting the analog signal output from the temperature sensor 110 and the pressure sensor 120 into a digital signal, and the converter 132a A central processing unit 132b for calculating and data-setting numerical values, recording means 132c for recording the data processed by the central processing unit 132b, and a printer 132d for printing the data processed by the central processing unit 132b; Including the detection recording unit 130, the pressure sensor 120 is connected to the temperature sensor 110 to compensate for the pressure value measured in consideration of the temperature change measured by the temperature sensor 110.

The temperature sensor 110 is installed inside the oil storage tank 200, measures the temperature inside the oil storage tank 200, converts the temperature into a predetermined voltage, and then transfers the temperature to the pressure sensor 120.

The temperature sensor 110 is reflected by the temperature value measured thereby to the pressure value measured by the pressure sensor 120 to improve the pressure measurement accuracy.

The pressure sensor 120 may be installed in the connecting member by connecting a separate connecting member to the oil storage tank 200, the pressure sensor 120 generates a voltage in accordance with the pressure applied to the sensor, and It is equipped with a circuit to compensate for the pressure change with temperature change so that the pressure can be measured accurately.

In detail, the pressure sensor 120 compares the voltage value V1 measured and converted directly with the temperature value measured by the temperature sensor 110, and compares the converted voltage value V2 with an error between V1 and V2. In the case of a slight case, either one of the values, preferably V1 is selected, and when the difference is large, a circuit for selecting and outputting V2, that is, a pressure value in consideration of the temperature change is provided.

Further, the V1 voltage value is input to the converter 132a through the pressure sensor connection 136c formed on the rear surface of the detection recording unit 130, and the V2 voltage value is a temperature formed on the rear surface of the detection recording unit 130. It is input to the converter 132a through the sensor connection 136b.

The detection recording unit 130 converts the analog signal output from the pressure sensor 120 into a digital signal, preferably an A / D converter and a digital signal output from the converter 132a in numerical values. A central processing unit 132b for calculating and converting data, a recording means 132c connected to the central processing unit 132b for recording the digitized data, a printer 132d for printing the digitized data, a pressure sensor 120, It is provided with a timer 132e connected between the converters 132a to allow the inspection to proceed within the time limit, which are installed in the main body 134a.

The main body 134a of the detection recording unit 130 is in the shape of a cube, and a handle 134b is provided on the upper surface of the main body 134a so as to be gripped and moved by the user, and a display unit 134c displaying the measured pressure value on the front surface thereof. And an operation switch 134d for turning on / off the power supply.

In addition, the main body 134a includes a power plug connection unit 136a connected to an external power source, a temperature sensor connection unit 136b connected to the temperature sensor 110, and a pressure sensor connection unit 136c connected to the pressure sensor 120. And a plurality of valves 136d each connected to a pipe closure provided in the tubular opening on the oil storage tank 200.

With the above structure, the effect is demonstrated.

First, the tubular openings on the oil storage tank 200 are respectively sealed using a pipe closure, and the pipe closure and the plurality of valves 136d are respectively connected.

Then, a pressure fluid generating means such as an external compressor or a vacuum pump is operated so that the pressure fluid generated therein is injected into the oil storage tank 200 to apply a test pressure.

And, if you want to check the leakage of the entire oil storage tank 200 and the pipes connected thereto, the pressure is measured in the state in which all the valves (136d) open.

On the other hand, if you want to check the leakage of the oil storage tank 200 or each of the pipes connected thereto, only the valve 136d connected to the inspection object is opened, and the rest are closed, and are sequentially changed while only opening the specific valve 136d. Check the pressure by measuring it.

During the inspection, the operation switch 134d is turned on to allow the timer 132e to operate within a given time. When the timer 132e is operated, the temperature sensor 110 and the pressure sensor 120 The voltage according to the detected temperature or pressure is output respectively.

At this time, since the compensation circuit is provided in the pressure sensor 120, when the difference between the voltage compensated by the temperature value measured by the temperature sensor 110 and the voltage measured by the pressure sensor 120 is small, whichever of the two. One voltage is output, and when the voltage difference is large, a temperature compensated voltage is output to the converter 132a.

Then, the converter 132a converts the input analog signal into a digital signal and delivers it to the central processing unit 132b. The central processing unit 132b calculates and converts the digital signal into a numerical value and records it in the recording means 132c. It also prints through the printer 132d.

Therefore, the inspector checks the printed value through the printer 132d to determine whether the oil storage tank 200 leaks.

However, the leak inspection system 100 of the conventional oil storage tank as described above has the following problems.

First, the external pressure sensor 120, the display unit 134c on the detection recording unit 130 and the printer 132d are provided one by one, and a plurality of valves 136d must be opened one by one to repeat the inspection. As a result, there is a problem that the test time is excessive.

For reference, as illustrated in FIG. 4, an oil storage tank 200 installed at a gas station typically includes a plurality of oil supply pipes 210 for receiving oil from oil, and oil to be supplied to a large number of external oilers. Oil pipe 220 provided, vent pipe 230 for discharging the volatile organic vapor evaporated from the stored oil to the outside and the outside air is circulated to solve the internal vacuum state generated when the oil is discharged through the lubricator, A plurality of tubular openings (th) are formed through various pipes such as the observation hole 240 for the manager to check the level of the stored oil, and thus the oil supply pipe 210, the plurality of oil pipes 220, and the air pipes ( 230, the observation hole 240 to be inspected, the inspection time is too excessively required.

This excessive amount of inspection time first causes gas station operators to open up, resulting in enormous business losses, and for inspectors to increase the cost of inspection.

Second, since the pressure sensor 120, which is a sensitive and expensive detection means, is separately provided to the outside, it can be easily broken and damaged by external factors such as vibration and shock generated during the transfer, installation, and inspection. There is a problem in that the maintenance cost is increased, and the inspection process is affected by external factors, thereby inaccurately detecting and deteriorating inspection reliability.

Third, there is a problem that the post-processing operation such as notifying the management agency of the test result later is somewhat difficult because the test result is simply printed on the printer 132d and provided.

On the other hand, a pipe closure is used to seal the tubular opening th on the oil storage tank 200 prior to leak testing of the oil storage tank 200 using pressure.

The prior art associated with such a pipe closure is a Korean Utility Model Registration No. 20-0441871 "fastener for checking the pressure of the oil storage tank", the technique will be described with reference to Figures 5 to 7 below.

The fastener 300 (hereinafter, referred to as a "pipe closure") according to the related art includes a bolt member 310, a ring-shaped elastic rubber piece 320, a ring-type pressing hole 330, a nut member 340, and an upper end. It includes a connector 350.

The bolt member 310 is integrally formed with a bolt rod portion 312 and a bolt head portion 314 formed to expand in diameter at a lower portion of the bolt rod portion 312, and a through hole penetrated through a central portion thereof. 310a is formed.

In the through hole 310a of the bolt member 310, as shown in FIG. 6, the temperature sensor 110 is installed to pass therethrough, or a pressure fluid supplied from an external pressure fluid generating means passes and is injected at the beginning of the inspection. During the inspection, the pressure fluid in the oil storage tank 200 passes and flows out.

The ring-shaped elastic rubber piece 320 has a ring shape made of a rubber material including a flexible synthetic resin that is pressed by an external force to be elastically expanded and deformed and elastically restored to its original form upon release of the external force. It is fitted to the bolt rod portion 312 of the 310, and in the fitted state, the lower surface side is in contact with the bolt head 314 of the bolt member 310.

The ring-shaped pressure port 330 is a ring-shaped that is fitted to the bolt rod portion 312 of the bolt member 310 similarly to the ring-shaped elastic rubber piece 320, and ring-shaped elastic in accordance with the fastening of the nut member 340 to be described later The rubber piece 320 is pressed to expand and deform.

The nut member 340 has a ring shape in which a female threaded hole is formed at the center of the bolt rod part 314 of the bolt member 310 to form a screw connection.

The upper connector 350 is screwed to the end of the bolt rod 314 of the bolt member 310, and one end of the connection hose drawn out from the external detection recording unit 130 or the pressure fluid generating means is fitted. And the temperature sensor 110 is installed so as to pass through, sealed using a separate sealant, or may have a closed body.

The usage method of the piping closure port 300 which has the above structure is demonstrated below.

In the leak test using pressure, the tubular opening 300 is used to seal each tubular opening th on the oil storage tank 200 before the test is performed.

To this end, the pipe closure 300 is erected so that the bolt head 114b of the bolt member 310 is positioned at the lower side and inserted into the tubular opening th to be sealed, and then the nut member 340 is inserted. Rotation in one direction causes the nut member 340 to move downward, pushing the ring-shaped pressure port 330, and the ring-shaped pressure port 330 pushed accordingly also pushes and compresses the ring-shaped elastic piece 320.

Then, the outer diameter is expanded while the ring-shaped elastic rubber piece 320 is compressed, and in close contact with the inner surface of the tubular opening th according to the expansion, thereby sealing the tubular opening th.

Thus, when the tubular opening th is closed, a predetermined fluid pressure is subsequently applied to the oil storage tank 200, and a pressure change is detected while being maintained for a predetermined time in the state, whereby a leak test is performed.

Then, when the leak inspection is finished, the inspector separates the pipe closure 300 from the tubular opening (th), for this purpose, first rotate the nut member 340 in the reverse direction so that the ring-shaped elastic piece 320 from pressure It is released to allow elastic recovery in the form of a circle, and then taken out from the tubular opening th and separated.

The pipe closure 300 as described above can seal or open the tubular opening (th) by using the elastic deformation of the elastic rubber piece 320, without being limited to the diameter of the tubular opening (th) of various diameters There is an advantage that can be used for the tubular opening th.

However, the conventional pipe closure 300 as described above has the following problems.

First, as the ring-shaped elastic rubber piece 320 is strongly supported by contacting the bolt heads 314 and the ring-shaped pressing holes 330 on both sides through the upper and lower surfaces thereof, the upper and lower sides thereof can be easily broken and damaged, There is a problem that frequent replacement is required.

Second, when the inspector rotates the nut member 340 in the forward and reverse directions to compress or restore the ring-shaped elastic rubber piece 320, one side of the nut member 340 is one side and the face of the ring-shaped pressure port 330. As it is rotated in the contacted state, it is very difficult to rotate the nut member 340 due to the frictional force generated by the surface contact between each other, there is also a problem in use inconvenience.

Third, since only one ring-shaped elastic rubber piece 320 is provided, the area of contact with the inner surface of the tubular opening th is small due to the expansion deformation, and thus it is not possible to provide complete sealing performance, thereby ensuring complete inspection reliability. There is also a problem.

The present invention was devised to solve the above-mentioned problems, and it is possible to make a very quick inspection, and damage of expensive pressure sensor can be prevented, and the pressure sensor is not affected by external factors such as vibration. It is an object of the present invention to provide a leak inspection system of an oil storage tank that can accurately detect and enable an inspector to easily perform post-treatment of inspection results.

In addition, the present invention allows the pipe closure to provide more complete airtight performance, to prevent damage of the elastically deformed elastic rubber piece, and to allow the inspector to easily turn the nut member with very small force. The purpose is to provide a leak inspection system for oil storage tanks that can provide improved inspection reliability and ease of use.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

Leak inspection system of the oil storage tank of the present invention for achieving the above object, the pipe closure is inserted into each of the plurality of tubular openings formed on the oil storage tank and sealed; Pressure fluid generating means for generating a pressure fluid and supplying the pressure fluid into the oil storage tank; A temperature sensor mounted on and used in the particular pipe closure selected to detect a temperature in the oil storage tank; And a plurality of pressure inlets connected to a plurality of the pipe closure sides through a connection hose and having a plurality of pressure inlets through which the pressure fluid in the oil storage tank flows, and having a one-to-one correspondence to the pressure inlets. A detection recording unit which is electrically connected with and detects and simultaneously records and displays a plurality of result values detected by the pressure sensor and the temperature sensor; It includes.

Preferably, the detection recording unit comprises: a pressure fluid delivery connector having an on / off valve for connecting and connecting the connection hose connected to the pressure fluid generating means and the connection hose connected to the pipe closure port and opening and closing the supply of the pressure fluid; It may be provided.

Also preferably, the detection recording unit may include: a printer for printing the result value; A display unit which displays and provides the result value; A connection port unit for downloading and providing the result value as electronic data to a connected external storage medium; And communication means for transmitting and providing the result value as electronic data to an external terminal to which a communication connection is made. It may be provided.

Also preferably, the pressure inlet, opening and closing valve for opening and closing; Each may be provided.

Also preferably, the pressure sensor may be a piezo-resistive semiconductor pressure sensor.

Also preferably, the pipe closure may include a bolt member consisting of a bolt head and a bolt rod portion; Ring-shaped elasticity consisting of a flexible rubber layer portion formed by a thick thickness of the soft material in the middle between the rigid rubber layer portion formed in a thin thickness of the relatively hard material on the upper and lower sides and coupled to the bolt rod portion Rubber piece; A ring-shaped pressure port fitted to the bolt rod part after the ring-shaped elastic rubber piece; And a nut member inserted into the bolt rod part and screwed after the ring-shaped pressure port. It can be configured as.

Also preferably, the ring-shaped elastic rubber piece is formed of one rubber material body, and the hard rubber layer part and the soft rubber layer part may be formed to be partitioned through a vulcanization process under different conditions.

Also preferably, the hard rubber layer portion and the soft rubber layer portion may be manufactured separately from each other and then bonded and integrated.

Also preferably, the pipe closure is provided with a ring-shaped bearing means which is provided so as to intervene between the nut member and the ring-shaped pressure port to enable easy rotation of the nut member through a sliding action; It may be configured to further include.

Also preferably, the pipe closure may include a bolt member comprising a bolt head and a bolt rod portion; The bolt rod part is provided so that two are laminated, each having a hard rubber layer part formed in a thin thickness as a relatively hard layer on one side and a soft rubber layer part formed in a thick layer on the other side of the hard rubber layer part and having a soft thickness. Ring-shaped elastic rubber piece provided to be in close contact with each other through the rubber layer; A ring-shaped pressure port fitted to the bolt rod part after the ring-shaped elastic rubber piece; And a nut member inserted into the bolt rod part and screwed after the ring-shaped pressure port. It can be configured as.

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According to the present invention, since the leakage inspection of the plurality of openings formed on the oil storage tank can be carried out at once, the inspection can be performed very quickly, thereby minimizing the operating restrictions of the gas station according to the inspection, thereby preventing the loss of business. In addition, the cost can be reduced.

In addition, according to the present invention, since the pressure sensor is provided to be protected inside the detection recording unit, the detection accuracy is prevented from being lowered by external factors such as vibration and shock, thereby improving inspection reliability. Damage and damage can also be blocked, thus reducing the cost of maintenance.

In addition, according to the present invention, since the test result can be provided by downloading or communicating as an electronic data, in addition to simply displaying and printing the test result, it is also possible to facilitate the post-processing work on the test result by the inspector. Can be achieved.

Furthermore, according to the present invention, the ring-shaped elastic rubber piece of the pipe closing opening is formed in the laminated structure of the hard rubber layer part of the both sides and the middle soft rubber layer part, so that the upper and lower sides of the bolt head part and the ring-shaped pressure port of both sides can be reinforced. Therefore, as the upper and lower sides can not be easily damaged during use, it can provide excellent durability, and also provide better airtight performance to improve inspection reliability, and also ring-shaped between the nut member and the ring-type pressure port. As the bearing means is provided to intervene, the nut member can be turned with very little force, so that the effect of providing convenience in use can also be achieved.

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

FIG. 8 is a block diagram showing a leak inspection system of an oil storage tank according to a preferred embodiment of the present invention, FIG. 9 is a configuration diagram thereof, and FIG. 10 is a perspective view showing a front side of a detection recording unit provided therewith. 11 is a perspective view showing a rear side of the detection recording unit.

The leak inspection system 1000 of the oil storage tank according to the present invention includes a plurality of pipe closing holes 1400 provided to seal the tubular openings th on the oil storage tank 200, respectively, and a positive or negative pressure fluid. Pressure fluid generating means 1300, such as a compressor or a vacuum pump provided on the outside to generate the supply to the oil storage tank 200, and is used in combination with a specific pipe closure 1400 is selected and stored oil The oil storage tank 200 is connected to each other through a temperature sensor 1200 that detects a temperature in the tank 200 and sends a detection value, and a plurality of pipe closing ports 1400 and a connecting hose 1500 to inspect the oil. Has a plurality of pressure inlets 1118 into which the pressure fluid is introduced, and includes a plurality of pressure sensors 1124 corresponding to the pressure inlet 1118 one-to-one, and electrically connected to the temperature sensor 1200, And a detection recording unit 1100 for simultaneously recording and displaying a plurality of pressure values detected from the pressure sensor 1124.

As is known, on the oil storage tank 200, a plurality of pipes 210, 220, 230, 240, such as an oil supply pipe 210, a plurality of oil supply pipes 220, a vent pipe 230, the observation hole 240, The tubular opening th is formed in the terminal of these piping 210, 220, 230, 240, respectively.

The pipe closure 1400 is used to seal a plurality of tubular openings (th) formed on the oil storage tank 200, one for each tubular opening (th).

The pipe closure 1400 is tightly sealed to the inner surface of the tubular opening (th) in accordance with the expansion deformation of the elastic rubber pieces 1420, 1420 'according to the pressure in the state inserted into the tubular opening (th) and sealed. After the inspection is finished, the elastic rubber pieces 1420 and 1420 'are released from the pressurization and elastically restored to a circular shape, and thus can be taken out and separated from the tubular opening th, and are not limited to the diameter of the tubular opening th. And can be widely used for tubular openings th of various apertures.

In the present invention, the improved pipe closure 1400 is provided in terms of performance and usability, which will be described later.

The pressure fluid generating means 1300 generates a pressure fluid having a positive pressure or a negative pressure in accordance with its operation and finally supplies the pressure fluid at a constant pressure or negative pressure into the oil storage tank 200 to generate a compressor or a negative pressure pressure fluid which generates a pressure fluid at a positive pressure. May be a vacuum pump.

The pressure fluid generating means 1300 may be directly connected to a specific pipe closure 1400 selected as a direct connection hose to supply pressure fluid directly to the oil storage tank 200, but preferably, the detection recording unit 1100. And first connected to the connecting hose 1500 to supply pressure fluid to the detection recording unit 1100 side, and then to the specific pipe closure 1400 through the separate connection hose 1500 from the detection recording unit 1100. Can be supplied.

The temperature sensor 1200 is installed in the oil storage tank 200 by being coupled to a specific pipe closure 1400 to be selected. Specifically, the temperature sensor 1200 is a part that is located inside the oil storage tank 200 to measure temperature. And a measuring unit and a signal transmission line that is drawn out long to transmit an electrical signal corresponding to the temperature value measured by the measuring unit to the detection recording unit 1100 side.

The temperature sensor 1200 measures and provides a temperature in the oil storage tank 200 so that the corresponding temperature value is reflected in the measured pressure value, thereby improving the pressure measurement accuracy.

To this end, the temperature sensor 1200 may provide a measurement result to the pressure sensor 1124 as in the related art so that the pressure sensor 1124 may transmit a pressure value in which the temperature value is reflected, but preferably the measured temperature value Can be sent to the detection recording unit 1100 so that the detection recording unit 1100 can be reflected in the pressure value, or simply record and display the temperature value to provide to the inspector.

The detection recording unit 1100 is implemented as a small device having a small size so as to have good mobility and portability. The detection recording unit 1100 records and displays the measured pressure value and provides it to the inspector.

The detection recording unit 1100 includes a cube-shaped main body 1102, and a handle 1104 is formed on an upper surface of the main body 1102 so that a user can grip and move.

More specifically, the detection recording unit 1100 has a connection hose 1500 connected to a pipe closing opening 1400 respectively installed at a plurality of tubular openings th, respectively, to transfer pressure fluid in the oil storage tank 200. A plurality of pressure inlets 1118, which are provided to be external to the main body 1102 and each have an opening / closing valve 1118a for opening and closing thereof, are connected to signal transmission lines of the temperature sensor 1200, and are transmitted from the temperature sensor 1200. The temperature sensor connection unit 1120 provided to receive the electrical signal, and the connection hose 1500 connected to the specific pipe closure 1400 together with the connection hose 1500 connected to the pressure fluid generating means 1300 are both. A pressure fluid delivery connector 1116 which is connected and delivers the pressure fluid supplied from the pressure fluid generating means 1300 to the oil storage tank 200 and has an on / off valve 1116a for opening and closing thereof, and connected to an external power source. To become And a power connection 1122.

In addition, the detection recording unit 1100 is provided with a plurality of pressure sensors respectively provided to correspond to the plurality of pressure inlets 1118 so as to detect the pressure applied through each pressure inlet 1118 and transmit an electric signal according to the detection result. 1124, a converter 1126 for converting analog signals output from the pressure sensors 1124 and the temperature sensor 1200 into digital signals, and digital signals output from the converter 1126 as numerical values and dataized. A central processing unit 1128, a memory means unit 1130 connected to the central processing unit 1128 for storing digitized data, a timer 1132 for providing time information for operation control, and printing the calculated data The printer 1112 for providing the data, the display unit 1114 for displaying the calculated data, and the data stored in the memory means 1130. Connection port unit 1108 for providing to an external storage medium, such as a communication means unit 1110 for providing data stored in the memory means unit 1130 to the external terminal via wired or wireless communication, and various settings from the inspector And an operation panel unit 1106 that receives a command operation.

The pressure sensor 1124 may be implemented as a semiconductor pressure sensor such as a piezo resistor, and outputs an analog signal according to the detected pressure.

Thus, according to the present invention, by using a plurality of tubular openings (th) formed in various positions on the oil storage tank 200 and a pressure inlet 1118 and a plurality of pressure sensors 1124 connected in a one-to-one manner at a time It is possible to simultaneously detect and provide pressure values for, that is, multi-input and multi-output enable the inspection to be completed very quickly, and to obtain the inspection results at several points to improve the reliability of the inspection. Can be.

In this regard, when the leak inspection is performed on the various points in this way, when the leak is confirmed, it is possible to more closely identify the site where the leak has occurred, so that the maintenance work and the like may be convenient later.

Further, according to the present invention, since a plurality of pressure sensors 1124 are provided to be protected inside the main body 1102 of the detection recording unit 1100, the breakage and damage can be blocked, and vibration, shock, More accurate detection can be performed without being influenced by external factors.

Furthermore, according to the present invention, the inspection result can be provided by simply displaying and printing the test result and also by downloading and communicating the data as electronic data, thereby making it easy for the inspector to post-process the test result after the test is finished. .

Incidentally, the opening / closing valve 1116a provided on the pressure fluid delivery connector 1116 opens and closes the supply of pressure fluid, and the opening / closing valve 1118a provided on each pressure inlet 1118 corresponds to the corresponding pressure inlet ( 1118) is open if used for inspection and closed if not used for inspection.

Hereinafter, a pipe closure 1400 improved in performance and usability according to the present invention will be described better.

12 is a cross-sectional view showing a pipe closure provided in the leak inspection system of the oil storage tank according to the preferred embodiment of the present invention.

The pipe closure 1400 according to the present invention basically includes a bolt member 1410, a ring-shaped elastic rubber piece 1420, a ring-shaped pressure port 1430, a nut member 1450, and an upper connector 1460.

The bolt member 1410 is configured to be integrally formed with a through hole 1410a in the center portion, the bolt rod portion 1414, and the bolt head portion 1412, and is formed of a metal material.

The ring-shaped elastic rubber piece 1420 has a ring shape that is fitted to the bolt rod portion 1414 of the bolt member 1410 and is formed of a rubber material including a flexible synthetic resin.

The ring presser 1430 has a ring shape that is fitted to the bolt rod portion 1414 of the bolt member 1410 and is formed of a metal material.

The nut member 1450 has a female screw hole in the center portion of the bolt member 1410 to be inserted into the bolt rod portion 1414 of the bolt member 1410 to form a screw coupling. The nut member 1450 is formed of a metal material.

The upper connector 1460 is screwed into the bolt rod portion 1414 of the bolt member 1410 to form a screw connection, and the connection hose 1500 is fitted to be connected, or installed to pass through the temperature sensor 1200, and then properly sealed. do.

According to the present invention, the ring-shaped elastic rubber piece 1420 is formed of one rubber material body, as shown in Figure 12, the upper and lower sides of the rigid rubber layer portion 1420a-1 is formed of a relatively hard material portion, the middle The soft rubber layer portion 1420a-2, which is a relatively soft material portion, is formed in the layer, that is, the laminated structure of the hard rubber layer portion 1420a-1-the soft rubber layer portion 1420a-2-the hard rubber layer portion 1420a-1. Is formed.

As a result, the upper and lower sides of the bolt head 1412 and the ring-shaped pressure port 1430 provided on both sides thereof are supported by contact with each other, so that the upper and lower sides thereof are not easily damaged during use. You may not.

The soft rubber layer portion 1420a-2 may have a degree of softness that may correspond to the softness of a conventional ring-shaped elastic rubber piece, and the hard rubber layer portion 1420a-1 may be relatively hard as compared to the soft rubber layer portion 1420a-2. This is reinforced.

The flexible rubber layer portion 1420a-2 is formed to have a relatively thick thickness in the vertical direction so that it can be easily deformed according to the press, while the rigid rubber layer portions 1420a-1 on both sides are simply used to reinforce on both sides. It is formed in a thin thickness.

The ring-shaped elastic rubber piece 1420 of the laminated structure may be formed of a synthetic rubber material such as nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR).

The method of forming the hard rubber layer portion 1420a-1 and the soft rubber layer portion 1420a-2 in a single rubber material body so as to be partitioned is essentially a constant pressure and temperature to add sulfur to the main component in the production of the synthetic rubber. By varying the amount of the sulfur component added by changing the conditions of the vulcanization process to be carried out in the can be made to have different hardness and ductility.

As such, when the hard rubber layer portion 1420a-1 and the soft rubber layer portion 1420a-2 are formed through the vulcanization process under different conditions, the edges appear on the boundary portions therebetween, so that different rubber bodies are combined.

However, the ring-shaped elastic rubber piece 1420 of the laminated structure does not need to be formed of just one rubber material body as described above, and each of the rigid rubber layer parts 1420a-1 through different materials or different vulcanization process conditions. ) And the flexible rubber layer portion 1420a-2 may be integrated by adhesive bonding to each other after they are manufactured.

Furthermore, according to the present invention, as shown in FIG. 13, two ring-shaped elastic rubber pieces 1420 'may be provided to be stacked up and down, and these two ring-shaped elastic rubber pieces 1420' are tubular as they are pressed. A wider area can be contacted with the inner side of the opening th, which can provide more complete airtight performance.

In this regard, when the two ring-shaped elastic rubber pieces 1420 'are provided in this manner, the desired degree of hermetic performance can be achieved even by pressurizing only with a small force and expanding and deforming a little, and thus may be convenient in use.

Thus, when two ring-shaped elastic rubber pieces 1420 'are provided, each ring-shaped elastic rubber piece 1420' has a hard rubber layer portion 1420a-1 'only on one surface side, that is, the hard rubber layer portion on one side ( 1420a-1 'and the other side of the flexible rubber layer 1420a-2'.

Furthermore, according to the present invention, a separate ring-shaped bearing means 1440 is provided between the ring-shaped pressure port 1430 and the nut member 1450, and the ring-shaped bearing means 1440 is a user's nut member ( 1450) to rotate smoothly with a very small force.

The ring-shaped bearing means 1440 may be preferably implemented with a plurality of balls that can be freely clouded between the upper plate and the lower plate, but the detailed configuration is particularly limited as long as it can smoothly provide a sliding action It may not be.

The operation of the leak inspection system 1000 of the oil storage tank according to the present invention having the configuration as described above will be described below.

First, the inspector closes the tubular openings th on the oil storage tank 200 using the pipe closure 1400, respectively.

That is, the ring-shaped elastic rubber piece 1420 provided by rotating the nut member 1450 of the pipe closing opening 1400 in one direction after inserting the pipe closing opening 1400 into each tubular opening th is expanded and deformed. To be tightly adhered to the inner surface of the pipe closure 1400.

Subsequently, the inspector mounts a temperature sensor 1200 which is extended from the detection recording unit 1100 to the specific pipe closure 1400, and connects hoses to the pipe closures 1400 to measure pressure. One end of 1500).

In addition, to connect the pressure fluid delivery connector 1116 on the detection recording unit 1100 by selecting the one for the injection of the pressure fluid from the connecting hose 1500 connected to the pipe closure 1400, and to measure the pressure The other ends of the connection hoses 1500, one end of which is connected to the pipe closing openings 1400, are connected to respective pressure inlets 1118 on the detection recording unit 1100, respectively.

Then, the inspector connects the other end of the connection hose 1500, one end of which is connected to the pressure fluid generating means 1300, to the pressure fluid transfer connector 1116 on the detection recording unit 1100.

This completes the installation work.

Next, the inspector operates the pressure fluid generating means 1300 so that the pressure fluid generated from the pressure fluid generating means 1300 passes through the pressure fluid delivery connector 1116 on the detection recording unit 1100 to store the oil. By being injected into the tank 200, the oil storage tank 200 to reach the appropriate test pressure.

The inspector then stops the pressure fluid generating means 1300 and also closes the open / close valve 1116a provided on the pressure fluid delivery connector 1116.

Then, the inspector operates the operation panel unit 1106 on the detection recording unit 1100 to instruct the detection recording unit 1100 to start the inspection.

Then, the detection recording unit 1100 collects detection values transmitted from an external temperature sensor 1200 and a plurality of built-in pressure sensors 1124, displays them on the display unit 1114, and displays the printer 1112. The printing result is provided, and the test result value is also stored in the internal memory means 1130.

The detection recording unit 1100 also provides the test result value stored in the memory means unit 1130 at any time as requested through the connection port unit 1108 or the communication unit unit 1110 as electronic data.

When the inspection for a predetermined time through this process, the inspector separates the pipe closure 1400 from the tubular opening (th), and terminates all the inspection process.

In the foregoing description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as merely illustrative of a preferred embodiment of the present invention.

1 is a block diagram showing a leak inspection system of the conventional oil storage tank (Korean Utility Model Publication No. 20-2008-0002624),

2 is a perspective view showing a front side of a detection recording unit provided in a leak inspection system of a conventional oil storage tank;

3 is a rear view of a detection recording unit provided in a leak inspection system of a conventional oil storage tank;

4 is a schematic configuration diagram showing a conventional oil storage tank installed at a gas station;

5 is an exploded perspective view showing a pressure closing pipe closing port (Korean Utility Model Registration No. 20-0441871) of a conventional oil storage tank;

6 is a cross-sectional view showing a pipe closure for checking pressure of a conventional oil storage tank;

7 is a cross-sectional view showing a state of use of a pressure closing pipe closing device of a conventional oil storage tank;

8 is a block diagram showing a leak inspection system of an oil storage tank according to a preferred embodiment of the present invention;

9 is a block diagram of a leak inspection system of an oil storage tank according to a preferred embodiment of the present invention;

10 is a perspective view showing a front side of a detection recording unit provided in a leak inspection system of an oil storage tank according to a preferred embodiment of the present invention;

11 is a perspective view showing a rear side of a detection recording unit provided in a leak inspection system of an oil storage tank according to a preferred embodiment of the present invention;

12 is a cross-sectional view showing a pipe closure provided in the leak inspection system of the oil storage tank according to the preferred embodiment of the present invention;

13 is a cross-sectional view showing another example of a pipe closure provided in the leak inspection system of the oil storage tank according to the preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

200: oil storage tank 210: oil supply pipe

220: oil pipe 230: vent pipe

240: observation hole th: tubular opening

1000: leak inspection system 1100: detection recording unit

1102: body 1104: handle

1106: operation panel portion 1108: connection port portion

1110: communication means 1112: printer

1114: display unit 1116: pressure fluid transfer connector

1116a: on-off valve 1118: pressure inlet

1118a: on-off valve 1120: temperature sensor connection

1122: power connection 1124: pressure sensor

1126 converter 1128 central processing unit

1130: memory means 1132: timer

1200 temperature sensor 1300 pressure fluid generating means

1400: pipe closure 1410: bolt member

1410a: through hole 1412: bolt head

1414: bolt rod 1420, 1420 ': ring type elastic rubber piece

1420a-1, 1420a-1 ': hard rubber layer part 1420a-2, 1420a-2': soft rubber layer part

1430: ring-type pressure port 1440: ring-type bearing means

1450: nut member 1460: top connector

1500: Connection Hose

Claims (11)

A pipe closure that is inserted into and coupled to a plurality of tubular openings formed on the oil storage tank, and is sealed to a pressure fluid generating means for generating and supplying a pressure fluid into the oil storage tank; And a temperature sensor for detecting a temperature in the oil storage tank and a detection recording unit for displaying a detection result, wherein the pipe closure is sequentially inserted into a bolt member with a ring-shaped elastic rubber piece and a ring-type pressure port, followed by a nut member. In the leak detection system of the oil storage tank which is composed of a screw and the top connector screwed, The detection recording unit, A plurality of tubular openings and a plurality of tubular openings respectively connected to each other through a connection hose and provided with at least a number of the tubular openings so that the pressure fluid in the oil storage tank flows from each inspection point, and a plurality of opening and closing valves for opening and closing, respectively. A pressure sensor, which is a piezo-resistive semiconductor pressure sensor that detects a pressure and a plurality of built-in units are provided to correspond to the pressure inlet and the pressure inlet one-to-one, and simultaneously prints a plurality of result values detected by the pressure sensor and the temperature sensor. And a display unit for simultaneously displaying and providing the result value, a connection port unit for downloading and providing the result value as electronic data to an external storage medium to be connected, and an external terminal for communication connection. The number of communications that transmits and provides values as electronic data And comprising a, The pipe closure is, It consists of a rigid rubber layer portion formed on the upper and lower sides of the rigid rubber layer portion formed in a thin thickness of the relatively hard material and integrally coupled with the hard rubber layer portion to have a thick thickness of the soft material in the middle between the hard rubber layer portions on both sides. The hard rubber layer portion and the soft rubber layer portion are formed as one rubber material so as to be partitioned through a vulcanization process under different conditions, or manufactured separately from each other, and then bonded and integrated together at an edge portion of the center hole inserted into the bolt member. The ring-shaped elastic rubber piece having a conical inclined surface portion inclined to be inclined in a conical shape, and is provided so as to intervene between the nut member and the ring-shaped pressure port to facilitate the rotation of the nut member through a sliding action With means Leak detection system of oil storage tanks according to claim. The method of claim 1, The detection recording unit, An oil storage tank further comprising a pressure fluid delivery connector having a connecting hose connected to the pressure fluid generating means and a connecting hose connected to the pipe closure and having an on / off valve for opening and closing the supply of the pressure fluid. Leak inspection system. delete delete delete delete delete delete delete A pipe closure that is inserted into and coupled to a plurality of tubular openings formed on the oil storage tank, and is sealed to a pressure fluid generating means for generating and supplying a pressure fluid into the oil storage tank; And a temperature sensor for detecting a temperature in the oil storage tank and a detection recording unit for displaying a detection result, wherein the pipe closure is sequentially inserted into a bolt member with a ring-shaped elastic rubber piece and a ring-type pressure port, followed by a nut member. In the leak detection system of the oil storage tank which is composed of a screw and the top connector screwed, The detection recording unit, A plurality of tubular openings and a plurality of tubular openings respectively connected to each other through a connection hose and provided with at least a number of the tubular openings so that the pressure fluid in the oil storage tank flows from each inspection point, and a plurality of opening and closing valves for opening and closing, respectively. A pressure sensor, which is a piezo-resistive semiconductor pressure sensor that detects a pressure and a plurality of built-in units are provided to correspond to the pressure inlet and the pressure inlet one-to-one, and simultaneously prints a plurality of result values detected by the pressure sensor and the temperature sensor. And a display unit for simultaneously displaying and providing the result value, a connection port unit for downloading and providing the result value as electronic data to an external storage medium to be connected, and an external terminal for communication connection. The number of communications that transmits and provides values as electronic data And comprising a, The pipe closure is, It consists of a hard rubber layer portion formed of a thin thickness of a relatively hard material on one side and a soft rubber layer portion formed to be integrally coupled with the hard rubber layer portion to have a thick thickness of a soft material on the other side of the hard rubber layer portion and the hard rubber layer portion The flexible rubber layer part is formed as a rubber material body so as to be partitioned through a vulcanization process under different conditions or manufactured separately from each other, and then bonded and integrated together. At the edge of the center hole inserted into the member, the ring-shaped elastic rubber piece having a conical inclined surface portion which is inclined in a conical shape, and is provided so as to intervene between the nut member and the ring-type pressing port, and facilitates the nut member through a sliding action. One turn Leak detection system of the fuel storage tank, it characterized in that it comprises a ring-like bearing means to. delete

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