WO2015002426A1 - Organic solvent leak detection apparatus - Google Patents

Abstract

The present invention relates to an organic solvent leak detection apparatus and particularly to an organic solvent leak detection apparatus, the resistance value of which changes in response to various leaking organic solvents, thereby detecting not only the leakage of an organic solvent but also the type of the leaking organic solvent. To this end, the apparatus according to the present invention comprises: a base film layer made of a film material; conductive lines formed lengthwise on the upper surface of the base film layer; and a coating layer applied on the upper surface of the base film layer by means of a substance, the resistance value of which changes in response to organic solvents, in a manner that the conductive lines are not exposed to the outside.

Description

Organic Solvent Leak Detection Device

The present invention relates to an organic solvent leak detection device, in particular, the organic solvent leakage detection for detecting the leakage state of the organic solvent as well as the type of leaked organic solvent by changing the resistance value in response to various organic solvents leaking Relates to a device.

Applicant has already proposed a tape-type leak detection sensor in a number of registered patents (10-0909242, 10-0827385, etc.) in the form of a tape and installed in a position where water is likely to leak. have.

As shown in FIGS. 1 and 2, the leak detection sensor 100 is formed by sequentially laminating a lower adhesive layer 120, a base film layer 110, and an upper protective film layer 130 upward from the bottom.

The lower adhesive layer 120 is to be attached to where the leakage occurs, it is configured in the form of an adhesive tape, the base film layer 110 is a layer for forming the conductive lines (111, 112) on the upper, of the conductive lines (111, 112) The pattern is formed of PET, PE, PTFE, PVC, or other Teflon-based films to form the pattern in a printing method.

The conductive lines 111 and 112 are spaced apart from each other on the upper surface of the base film layer 110 and are disposed in a strip shape in parallel in the longitudinal direction, and are printed with a conductive ink or a silver compound.

The upper protective film layer 130 is stacked on top of the base film layer 110 to protect the conductive lines 111 and 112 from external stimuli. Like the base film layer 110, PET, PE, PTFE, and PVC Alternatively, it is formed of other Teflon-based materials, and configured to penetrate the sensing holes 131 at predetermined intervals at positions corresponding to the conductive lines 111 and 112.

Therefore, when a leak occurs, water is introduced through the sensing hole 131 at the location where the leak occurs, so that the two conductive lines 111 and 112 are energized by the moisture, and the remote controller is in the energized state, that is, the closed circuit is formed. By detecting the leak can be detected and the alarm accordingly.

By the way, although the conventional film type leak detection sensor 100 has conductivity and can detect leakage of the conductive solution, various oils such as lubricating oil, hydraulic oil, insulating oil, gasoline, diesel oil, kerosene, aviation oil, normal nucleic acid, dichloroethylene (Acetylene dichloride), dichloroethane (ethylene dichloride), methanol, carbon tetrachloride, acetone, ortho-dichlorobenzene, carbon disulfide, methyl acetate, xylene, chlorobenzene, chloroform, tetrachloroethane (acetylene tetrachloride), tetrachloroethylene ( There is a problem in that only organic solvents such as pa-chloroethylene), toluene, trichloroethylene, and other petrochemical compounds cannot be selectively detected.

The present invention for solving this problem, various oils, normal nucleic acid, dichloroethylene (acetylene dichloride), dichloroethane (ethylene dichloride), methanol, carbon tetrachloride, acetone, ortho-dichlorobenzene, carbon disulfide, methyl acetate, xylene Oils by reacting rapidly with contact with organic solvents such as chlorobenzene, chloroform, tetrachloroethane (acetylene tetrachloride), tetrachloroethylene (pa-chloroethylene), toluene, trichloroethylene and other petrochemical compounds. And it is an object to provide an organic solvent leak detection device for detecting the leakage of the organic solvent.

Another object of the present invention is to set the upper and lower limit resistance value from the basic resistance value of the sensing line to measure the time the resistance value is changed within the limit resistance value to determine the type of organic solvent leaking It is to provide a leak detection device.

To this end, the organic solvent leakage detection apparatus of the present invention

A base film layer made of a film material;

A conductive line formed in a longitudinal direction on an upper surface of the base film layer;

And a coating layer applied to an upper surface of the base film layer so that the conductive line is not exposed to the outside by a material whose resistance value changes in response to an organic solvent.

And, the present invention

A base film layer made of a film material;

A conductive line formed in a longitudinal direction on an upper surface of the base film layer;

A material that is dissolved or eroded by the organic solvent, the coating layer covering the conductive line; an organic solvent leakage detection device is configured,

A controller is connected to the organic solvent leak detection device to supply sensing power to the conductive line and to generate an alarm according to a change in resistance value over time.

The present invention can quickly detect the organic solvent leakage state by reacting quickly to the leaking organic solvent, it is possible to quickly check the fire, soil or water pollution due to leakage and to appropriately cope with this.

In addition, by generating an alarm according to the type of organic solvent leaking, a quick and corrective action can be taken for leakage.

1 is an exploded structure of a known leak detection apparatus.

2 is a cross sectional view of FIG.

3 is a view showing the structure of an organic solvent leak detection apparatus according to a first embodiment of the present invention.

4 is a view showing a circuit structure and a state in which a controller is connected to the first embodiment of the present invention;

5 is a view showing the structure of an organic solvent leak detection apparatus according to a second embodiment of the present invention.

6 is a view for explaining a change in resistance value of a conductive line due to leakage of an organic solvent.

7 is a view showing a state in which a controller is connected and a circuit structure in a second embodiment of the present invention;

8 is a graph showing an operating state of a controller for generating an alarm due to a change in resistance value according to the type of leaked organic solvent.

9 illustrates another form of organic solvent detection sensor.

10 and 11 show examples for forming a conductive line.

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

Figure 3 is a view showing the structure of the organic solvent leak detection sensor 200 applied in the first embodiment of the present invention, the base film layer 210 of PET, PE, PTFE, PI, PVC or other Teflon-based film material ), And the upper protective film layer 230 stacked on the base film layer 210, the coating layer 240 stacked between the base film layer 210 and the upper protective film layer 230.

On the upper surface of the base film layer 210, a pair of conductive lines 211 and 212 are spaced apart from each other and arranged in a strip shape in parallel in the longitudinal direction, and the conductive lines 211 and 212 may be formed of a silver compound, a conductive ink, and a metal. It is formed by various conductors such as thin plates or sheets.

The upper surface of the conductive line (211,212) is formed with a coating layer 240 to cover the entire conductive line (211,212) or the base film layer 210, the coating layer 240 is a lubricant, operating oil, insulating oil, gasoline, diesel, Various oils such as kerosene and aviation oil, normal nucleic acid, dichloroethylene (acetylene dichloride), dichloroethane (ethylene dichloride), methanol, carbon tetrachloride, acetone, ortho-dichlorobenzene, carbon disulfide, methyl acetate, xylene, chlorobenzene, chloroform , Which is dissolved or eroded by reacting with organic solvents (hereinafter referred to as organic solvents) such as tetrachloroethane (acetylene tetrachloride), tetrachloroethylene (pa-chloroethylene), toluene, trichloroethylene, and other petrochemical compounds. Is formed.

On the other hand, the composition constituting the coating layer 240 is composed of a mixture of 45 to 55% by weight of non-ionic surfactant to 45 to 55% by weight of aqueous polystyrene (Polystyrene), to reduce the surface tension of the conductive line in the mixture For this purpose, a wetting agent, ethanol for volatilizing the solvent during printing, and grayene, which are carbon nanotubes, are added in an amount of 1 to 2% by weight.

Aqueous polystyrene is a material that is weakly soluble in acid, and a nonionic surfactant is a material that reacts with an organic solvent, and is a composition that easily dissolves when the organic solvent contacts the coating layer 240.

The wetting agent is to lower the surface tension when the coating layer 240 is formed by the printing method using the composition of the present invention. If the surface tension is high, the base film layer 210 may be aggregated without spreading during the printing of the coating layer 240. ) Or the adhesion force to the conductive lines 211 and 212 falls.

Therefore, this problem is solved by lowering the surface tension by the addition of the wetting agent.

In addition, 1 to 2% by weight of volatile ethanol and gray pin are added, which is to increase the adhesion by volatilizing the solvent of the aqueous polystyrene at the time of printing the coating layer (120).

Therefore, the mixture is applied to the entire upper surface of the base film layer 210 on which the conductive lines 211 and 212 are formed by the printing method to form the coating layer 220 or the coating layer 240 to be limited to the conductive lines 211 and 212 only. Done.

At this time, the thickness of the coating layer 240 has a thickness of 2 ~ 20㎛.

The upper protective film layer 230 is formed of a PET, PE, PTFE, PI, PVC or other Teflon-based film material, the sensing hole 231 at regular intervals in the longitudinal direction at the position corresponding to the conductive lines (211,212) Has a formed structure.

Therefore, when the oil leakage of the organic solvent occurs, the organic solvent is introduced through the sensing hole 231 of the upper protective film layer 230, thereby causing a change in the resistance value while the coating layer 240 is dissolved or eroded. In addition, since the resistance value between the conductive lines 211 and 212 is changed by the change of the resistance value, it is possible to detect the leakage of the organic solvent.

4 is a diagram showing the entire system for checking the leakage of the organic solvent, the start connector 400 and the end connector 500 are connected to both ends of the organic solvent leakage detection sensor 200, the start connector 400 ) Is connected to the controller 300, the end connector 500 is a connector for connecting the conductive lines (211,212) at the end of the organic solvent leakage detection sensor 200.

Therefore, when leakage of the organic solvent occurs and flows through the sensing hole 231 and the first conductive line 211 and the second conductive line 212 are energized, a resistance value change occurs, thereby causing a remote controller ( 300) can check the leakage of the organic solvent.

As a second embodiment of the present invention, as shown in FIG. 5, the conductive lines 211 and 212 formed on the base film layer 210 are formed of a material whose resistance value changes in response to an organic solvent.

To this end, the conductive lines 211 and 212 are made of 50 to 99% of conductive carbon having conductivity such as active carbon or carbon nano tube or graphene or carbon black, and polyurethane as a binder. PU) 1 to 50% by weight of the conductive carbon ink is mixed, and the conductive carbon ink is printed on the base film layer 210 by various printing methods such as gravure printing, silk screen printing, inkjet printing, and the like. Conductive lines 211 and 212 are formed.

In addition, 1 to 50% by weight of any one of polymethyl methacrylate (PMMA), polycarbonate (PC), and phenol resin (PF) may be used as the binder.

The upper protective film layer 230 is formed of a synthetic resin material, such as PC, PP, PE, PI, PET, and Teflon, which is resistant to a strong acid solution, and is formed to have a thickness of 50 to 300 μm, and has a sensing hole at a position where conductive lines 211 and 212 are formed. 231 is formed.

Therefore, when leakage of the organic solvent occurs, the alkaline solution flows through the sensing hole 231 at the location where the leakage occurs, and as shown in FIG. 6, the binder constituting the conductive lines 211 and 212 reacts with the organic solvent for a time. As this elapses, the arrangement of the conductive carbon particles collapses as it swells.

As a result, the resistance values of the conductive lines 211 and 212 are increased, and the remote controller is provided with a change in the resistance values of the conductive lines 211 and 212 to check whether the organic solvent is leaked.

In this case, the conductive lines 211 and 212 may be variously configured as shown in Table 1 below.

Table 1

	First conductive line 211	Second conductive line 212
One	Active Carbon or Carbon Black or Carbon Nanotubes (CNT) or Graphene + Binder	Active Carbon or Carbon Black or Carbon Nanotubes (CNT) or Graphene + Binder
2	Silver compound	Active Carbon or Carbon Black or Carbon Nanotubes (CNT) or Graphene + Binder
3	Metal sheet	Active Carbon or Carbon Black or Carbon Nanotubes (CNT) or Graphene + Binder
4	Other conductors	Active Carbon or Carbon Black or Carbon Nanotubes (CNT) or Graphene + Binder

When both the first conductive line 211 and the second conductive line 212 are mixed with active carbon or carbon black or carbon nanotubes (CNT) or graphene, the first conductive line 211 and the first conductive line 211 The sensing hole 231 is formed at a position corresponding to the second conductive line 212.

However, the first conductive line 211 is composed of a conductor such as a silver compound, a metal thin plate, a conductive ink, and only the second conductive line 212 is formed on the active carbon, carbon black, carbon nanotube (CNT), or graphene (Graphene). If the binder is mixed, the sensing hole 231 should be formed only at a position corresponding to the second conductive line 212.

FIG. 7 is a view showing the entire system for checking whether the organic solvent is leaked. As shown in FIG. 7 (a), the start connector 400 and the end connector (at both ends of the strong acid solution leakage detection sensor 200) are shown. 500 is connected, the start connector 400 is connected to the controller 300, the end connector 500 is a connector for connecting the conductive lines (211,212) at the end of the organic solvent leakage sensor 200.

FIG. 7B is a circuit diagram illustrating an example in which the second conductive line 212 is formed of a material whose resistance value changes in response to an organic solvent, and the first conductive line 211 is formed of a conductor. When leakage occurs and flows through the sensing hole 231 and comes in contact with the second conductive line 212, a change in resistance value of the second conductive line 212 occurs, which causes the remote controller 300 to have an organic solvent. The leak can be confirmed.

On the other hand, organic solvents have various types, but in the structure in which the conductive lines 211 and 212 described above are energized to cause a change in resistance value, only the leakage state can be known by simply changing the resistance value due to leakage of the organic solvent. The type of organic solvent that leaks is very difficult to identify.

Therefore, in the present invention, it is possible to confirm the kind of the leaking organic solvent as the resistance value changes over time.

To this end, the controller 300 receives a change in the resistance value of the conductive line 212 or a change in the resistance value generated by energizing the conductive lines 211 and 212 in the first and second embodiments, and the resistance value according to the passage of time. The change of and the kind of the organic solvent is determined accordingly.

FIG. 8 illustrates an operation state of the controller 300 for determining the type of the organic solvent according to the resistance value change between the two conductive lines 211 and 212 when the coating layer 240 is formed as in the first embodiment. As a graph, a reference resistance value according to the sensor length of the organic solvent leakage detection sensor 200 is set in the controller 300. The external environment such as external temperature, humidity, electrical noise, and physical contact is based on the reference resistance value. '+' Offset value and '-' offset value are set to absorb the change in self-resistance value.

This offset value is adjusted according to the environment in which the organic solvent leak detection sensor 200 is installed.

In addition, the controller 300 is set to the high limit value, that is, the upper limit resistance value in the '+' direction of the reference resistance value, and the alarm set value (Low Limit) or the lower limit resistance value is set in the '-' direction. By adjusting the range of the alarm setting value, the sensing sensitivity can be adjusted.

Therefore, the organic solvent is leaked and the resistance value between the conductive lines 211 and 212 gradually decreases, so that the type of the organic solvent can be determined by measuring the time that falls within the range of the alarm set value.

For example, in the case of chemical solution A, when leaked and contacted with the coating layer 240, the coating layer 240 is dissolved or eroded, and a change in resistance occurs, and an alarm is set from the time when the change in the resistance occurs. It is possible to determine the type of the organic solvent according to the measurement time by measuring the time when the resistance value changes within the range of the value coming in the controller 300.

In the case of chemical solution B, chemical solution C, and chemical solution D, since the resistance value changes within the range of the alarm set value within a relatively short time than the chemical solution A, the controller 300 measures such a time, The type of solvent can be determined.

Therefore, when the resistance change value of each chemical solution matches the alarm set value (High Limit), the controller 300 generates an alarm at the position, and then detects the change in the resistance value continuously. Like chemical solution D, a change in resistance value may occur so as to deviate from an alarm set value (Low Limit), and the controller 300 generates an alarm at a position at which the alarm set value (Low Limit) deviates.

The controller 300 stores data on the change of the resistance value according to the time-lapse of the various organic solvents, so that the time at which the change in the resistance value enters the range of the alarm set value from the time when the initial resistance value changes occurs. In particular, an alarm may be generated for the type of chemical solution, ie, the organic solvent, corresponding to the corresponding time.

In addition, if the second embodiment is applied, when the resistance value of the conductive line 212 is increased by the organic solvent, the resistance value will increase as time passes.

That is, according to the first and second embodiments of the present invention, when the resistance value of the conductive lines 211 and 212 decreases or increases, the type of organic solvent that leaks by judging the degree of change in the resistance value as time passes. Can be determined.

In addition, the tape type organic solvent leak detection sensor can be replaced with the cable type sensor and can be applied to the strong acid solution leakage detection device of the present invention. As shown in FIG. 9, the cable sensor 600 has two conductive wires ( 610, 620 is configured to coat the coating layer 630 with a material dissolved by an organic solvent on the outside in a state spaced apart side by side.

The coating layer 630 may be formed of a material coated with the same material as the coating layer 240 of the present invention or dissolved or eroded by an organic solvent.

Therefore, when oil comes into contact with the coating layer 630, the coating layer 630 is dissolved and a change in resistance occurs, and the resistance value between the conductive lines 610 and 620 is changed by the change in the resistance value.

This operation has already been described above.

In addition, when the conductive lines 211 and 212 are formed of active carbon, carbon nanotubes (CNT), or graphene (Graphene), they are formed by a printing method or as shown in FIG. 10. Attaching the double-sided tape to the position where the conductive lines 211 and 212 are to be formed on the upper surface or applying the adhesive to form the adhesive 211-1 and 212-1, then activated carbon or carbon in powder form It can be formed by spraying nanotubes (CNT) or graphene (Graphene).

That is, the conductive powder is sprayed onto the adhesive 211-1 and 212-1 to form the conductive lines 211 and 212.

Accordingly, conductive lines may be formed by attaching conductive active carbon, carbon nanotubes (CNT), or graphene (Graphene) only at the positions where the adhesives 211-1 and 212-1 are formed.

Alternatively, the conductive lines 211 and 212 may be formed by a sputtering process. The sputtering process places the conductive metal and the base film layer 210 of the present invention in a vacuum chamber. The film layer 210 is covered with a protective film 213 as shown in Figure 11 except for the position where the conductive line is to be formed.

The protective film 213 may be a tape made of a synthetic resin material.

Applying a negative voltage to the conductive metal, applying a positive voltage to the base film layer 210, and then argon gas into the vacuum chamber, the ionized argon gas collides with the conductive metal and protrudes. Metal particles are deposited on the base film layer 210.

When the protective film 213 is removed after the deposition process is completed, conductive lines 211 and 212 are formed.

The reason for using the sputtering process is that when the conductive lines 211 and 212 are formed of a conductive material such as a conductive ink, a silver compound, a metal sheet or a thin plate, and have a high resistance value, the upper portion thereof has a high resistance value. When the coating layer 240 is applied to the conductive lines 211 and 212 and the thickness of the coating layer 240 is thickened to 30 ~ 50㎛, the coating layer 240 by the thickness of the conductive lines (211,212) stably the base It may not be attached to the film layer 210.

However, in the case of using such a sputtering method, since the thickness of the conductive lines 211 and 212 may have a thickness of 0.1 to 1 μm, the thickness becomes thinner, and the coating layer 240 is stably formed on the base film layer 240 by the thin thickness. It can be attached.

Meanwhile, the conductive lines 211 and 212 are made of a material in which active carbon or carbon black or carbon nanotubes (CNT) or graphene are mixed with a binder instead of two, and only one conductive line is formed on the upper portion of the base film layer 210. It may be formed on the surface, and both ends of the one conductive line may be connected to the controller by a conductive cable.

Claims (13)

1. A base film layer made of a film material;

   A conductive line formed in a longitudinal direction on an upper surface of the base film layer;

   And a coating layer applied to an upper surface of the base film layer so that the conductive line is not exposed to the outside by a material whose resistance value changes in response to the organic solvent.
2. The organic solvent leak detection apparatus according to claim 1, wherein the organic solvent leakage detection device comprises a mixture of 45 to 55 wt% of non-ionic surfactant and 45 to 55 wt% of aqueous polystyrene.
3. 3. The mixture of claim 2, wherein the mixture includes a wetting agent to lower the surface tension of the conductive line, ethanol for volatilizing the solvent during printing, and grayene (graphene), which is a carbon nanotube. The organic solvent leakage detection apparatus, characterized in that the mixture is added by 2% by weight.
4. A base film layer in tape form; In the leakage oil detection device formed of a conductive line printed in the longitudinal direction on the upper surface of the base film layer,

   And the conductive line is formed of a material whose resistance value is changed in response to the organic solvent.
5. According to claim 4, The conductive line is 50 to 99% by weight of the conductive carbon of any one of polyurethane, polymethyl methacrylate (PMMA), polycarbonate (PC), phenol resin (PF) 1 to 50% by weight Organic solvent leakage detection device characterized in that formed of a mixed mixture.
6. The organic solvent leakage detecting apparatus of claim 5, wherein the conductive carbon is any one of active carbon, carbon nanotubes (CNT), graphene, and carbon black.
7. A base film layer made of a film material;

   A conductive line formed in a longitudinal direction on an upper surface of the base film layer;

   As the material dissolved or eroded by the organic solvent, a coating layer covering the conductive line; an organic solvent leakage detection device is configured,

   And a controller connected to the organic solvent leak detection device to supply sensing power to the conductive line and to generate an alarm according to a change in resistance value over time.
8. A base film layer made of a film material;

   The organic solvent leakage detection device is composed of a conductive line formed in the longitudinal direction on the upper surface of the base film layer made of a material whose resistance value changes in response to the organic solvent,

   And a controller connected to the organic solvent leak detection device to supply sensing power to the conductive line and to generate an alarm according to a change in resistance value over time.
9. Two strands of conductive wire spaced apart from each other;

   The organic solvent leakage detection device is composed of a material that is dissolved or eroded by the organic solvent, the coating layer coated to the outside of the conductive wire,

   And a controller connected to the organic solvent leak detection device to supply sensing power to the conductive wire and to generate an alarm according to a change in resistance value over time.
10. 10. The controller of claim 7, 8, or 9, wherein the controller sets a reference resistance value of the organic solvent leak detection device, and in the '+' direction and the '-' direction of the reference resistance value. The organic solvent leakage detection device, characterized in that the upper limit resistance value and the lower limit resistance value of the alarm set value is set.
11. The organic solvent leakage sensing apparatus of claim 4, 7, or 8, wherein the conductive lines are formed in pairs, and each conductive line may be configured as shown in Table 1. 10. .
12. The organic solvent according to any one of claims 4, 7, or 8, wherein the conductive line is formed by forming an adhesive on an upper surface of the base film layer, and spraying conductive powder on the adhesive. Leak detection device.
13. The organic solvent leakage sensing apparatus of claim 1, wherein the conductive line is formed by a sputtering process.

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