KR101861238B1 - Method of manufacturing liquid leak detection cable - Google Patents

Abstract

The present invention relates to a leakage detection cable used in a liquid leakage detection system, and more particularly, to a liquid leakage detection cable, in which a viscoelastic center line is used as a center member and leakage sensing lines are spirally wound on a surface of the viscoelastic center line, a complementary support line and a complementary power line are collectively wound by using two-row spiral grooves defined by the leakage sensing lines such that the leakage sensing lines can be stably wound in a spiral form, and a separate compression mesh tube is closely fixed to the outside of the cable of a spiral winding state, so that the cable including the leakage sensing line can be more securely fixed and freely bent. The leakage detection line cannot be moved even in the bending state so that leakage detection for liquid can be stably performed. The cable can be manufactured at a high speed and mass production so that the manufacturing cost can be reduced. Since the leakage detection line can be securely fixed by the complementary support line and the complementary power line and the cable can be securely and stably fixed by the pressing mesh tube, the liquid leakage can be rapidly and accurately detected while maintaining a constant resistance value without changing the reference resistance value of the leakage detection line even when constructing a bending structure, a curvature structure or various curved structures, so that the reliability can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a manufacturing method of a liquid leak detection cable,

More particularly, the present invention relates to a leak detection cable for use in a liquid leakage detection system, and more particularly, to a leak detection cable having a viscoelastic coating layer, a leaky wire, a complementary support wire, It is designed to have excellent productivity. It can maintain stable sensing performance without the flow of leakage sensing line by applying a compression mesh tube as required, and at the same time, it provides free bendability, so liquid leakage detection And a method of manufacturing a cable.

Generally, water, oil or chemicals are spilled inside or outside of various kinds of oil storage tanks, air conditioning facilities, cyclone or floor or wall or slab of building structure, water pipe, wastewater pipe and various machinery room, A liquid leak detection system is installed to quickly detect and recognize the inflow of these.

In the liquid leakage detection system, the leakage sensing cable is fixed to the inside or outside of the installation object, and a reader cable is connected to the leakage sensing cable. Then, in a state where the alarm module is connected to the reader cable, And the alarm module generates an alarm when the set resistance value of the leak detection cable changes due to leakage or inflow of the liquid, so that the leak condition and the position can be quickly recognized.

This liquid leak detection system quickly detects and warns against leakage of storage liquids or liquids from storage tanks such as water, oil or various chemicals, or various fluid piping, thereby preventing economic loss and safety due to mass leakage accidents and oil leakage It can prevent accidents or natural disasters.

In addition, since it is installed in the machine room, the control room floor, the wall, or the ceiling slab, which is equipped with expensive mechanical equipment, operating system or operating equipment in various buildings, it quickly detects and warns the liquid leakage from the inside as well as the outside. To protect expensive equipment and equipment, as well as to minimize physical damage to facilities and equipment due to liquid leaks and inflows and economic losses due to system shutdown.

A conventional leak detection cable applied to such a liquid leakage detection system is a leak detection cable in which two signal lines and two detection lines are opposed to each other as shown in Registration Practice Model No. 20-0328067, According to the present invention, the signal wire and the sensing wire have a structure in which they are helically twisted. Accordingly, a leakage sensing cable capable of widening an effective area for detecting moisture without increasing the diameter or length of the entire cable has been registered and registered.

In addition, as shown in Registration Practical Utility Model No. 20-0417411, a landfill leachate and leak detection cable for detecting leachate in a landfill or changing the thickness of a cable to detect leakage of leaking water, And includes a communication line connection part for connecting the communication line between a cable and a cable having a plurality of communication lines as in the registration number 10-0616275, a communication line and a sensing line, and the communication line A leakage detection line installed between the communication line and the communication line of the connection unit and detecting leakage or disconnection phenomenon due to disconnection or short circuit of the communication line or the sensing line; A signal transmitter for transmitting a signal, a signal received from the transmitter, And a receiver for detecting the position of the communication line connection part, thereby preventing leakage of labor, loss of time, and economic loss due to the fact that the communication cable itself can detect the leakage of the communication cable without the need of manpower input or detection for separate leak detection. And a leak detection device for a communication cable having an effect of accurately detecting the occurrence and occurrence of a leak or disconnection phenomenon has been enacted and registered.

In addition, as disclosed in Registration Practical Utility Model No. 20-0433613, the sensor cable for detecting leakage includes an internal cable including a communication line for data communication, a position confirmation line for positioning, and an outer cable surrounding the outer circumference of the inner cable. An external cable including a power supply line for detecting leakage of water and a sensing line for detecting leakage and a coupling means for electrically connecting the internal and external cables to both ends of the internal and external cables, And a detecting means for transmitting leakage or disconnection information transmitted from the sensor cable for detecting leakage to a user, and a leakage detection system using the sensor cable are disclosed and registered.

The present invention also relates to a system for detecting breakage and leakage of a pipe using a pipe for damages and water leakage and an optical cable in which an optical cable is installed, Pipes and systems that detect the breakage and leakage of pipes by measuring the strain, temperature, and vibration of the pipes.

However, in a conventional leak-sensing cable, a twisted-type cable using only a sensing wire and a power line is poor in flexibility and lacks bendability, which makes it difficult to arrange the cable in a curved or curved shape. Since the reference resistance value is varied due to the variation of the spiral spacing, the malfunction of the device or the incapability of detection is frequently caused. Therefore, since the spiral wound form of the sensing line flows during the installation process, Due to the interval, the reference resistance value differs for each sensing cable, and precise and stable sensing can not be achieved, and high-quality construction can not be achieved.

In addition, when the sensing cable is manufactured using the core material having the spiral-shaped winding groove, the flexibility of the core material itself is low, so that it is impossible to construct and install the sensing cable in curved or bent form. It is troublesome to fix the entire cable to the surface of the object to be installed due to the restoring force and the cable is excessively enlarged due to the core material so that the narrow section or the gap can not be installed, And the like.

Korean Registered Utility Model No. 20-0328067 (registered on September 17, 2003) Korean Registered Utility Model No. 20-0417411 (registered on May 22, 2006) Korean Registered Patent No. 10-0616275 (registered on Aug. 21, 2006) Korean Registered Utility Model No. 20-0433613 (registered on December 05, 2006) Korean Registered Patent No. 10-0945290 (registered on Feb. 24, 2010)

SUMMARY OF THE INVENTION The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a viscoelastic centerline which is spirally wound around a surface of a viscoelastic center line using a viscoelastic centerline as a center member, And the auxiliary type power source line are mixedly wound to maintain a stable spiral wound state with respect to the leak detection wire and a separate compression mesh tube is fixedly attached to the outside of the cable in the spiral wound state, So that a more rigid fixation of the fixing member can be achieved,

Leakage detection cable is flexible and elastic as well as excellent bendability. It is manufactured in a simple spiral twisted shape, and it has excellent economical efficiency due to excellent productivity and mass production as well as cost reduction. It can be bent or curved in various forms The present invention provides a method of manufacturing a liquid leakage sensing cable having a feature that a stable sensing efficiency can be produced without changing the reference resistance value even when it is applied in a form of a liquid leakage sensing cable.

According to an aspect of the present invention, there is provided a viscoelastic centerline manufacturing process comprising: forming an insulative viscoelastic coating layer on a surface of an elastic wire; forming a viscoelastic centerline by forming a conductive coating layer on the surface of the conductive sensing wire; And a method of manufacturing a complementary support wire which is formed by forming an insulative elastic layer on the surface of a bendable wire of a bendable type and a method of manufacturing a complementary power supply wire by forming an insulative cover layer on the surface of a bendable conductive power wire,

A first spiral winding step of spirally winding a pair of leak detecting wires along the longitudinal direction on the surface of the viscoelastic center line at regular intervals; The second spiral groove portion of the two-wire spiral groove portion due to the leak detection line generated by the first spiral winding is wound around the first spiral groove portion so that one complementary support line and one complementary power supply line are in close contact with each other between the leak- A spiral winding step; And a third spiral winding step of spirally winding the second spiral groove portions of the two-wire spiral groove portions so that another complementary support wire and another complementary type power supply wire come in close contact with each other between the leak detection wire and the second spiral groove portion.

According to the present invention, since the viscous elastic center line having flexibility and elasticity is a central member, the leakage sensing line, the shape supporting line, and the shape supporting line are closely wound in a spiral shape to allow free bending. And it is very economical because the production cost can be reduced because it can be produced at a high speed in a large amount and it is very economical that the leak detection wire is closely fixed by the support wire and the booster type power supply line, It is possible to maintain a constant resistance value at all times without changing the reference resistance value for the leak detection wire even when bent or bent or in the construction of various curves, It can detect the state quickly and accurately, The reliability can be further improved.

1 is a block diagram of a leak detection cable according to the present invention;
FIG. 2 is a view showing a sequential winding process of the leak detecting cable according to the present invention
Fig. 3 is an overall configuration diagram of a leak detection cable according to the present invention
4 is a view illustrating a process of inserting a compression mesh tube into a leak detection cable according to the present invention
5 is a view showing a state in which a compression mesh tube is inserted into a leak detection cable according to the present invention
6 is a state in which a compression mesh tube is closely adhered to a leak detecting cable according to the present invention
Figure 7 is a use example of a leak detection cable according to the present invention

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

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

FIG. 1 is a block diagram of a leak detection cable according to the present invention, FIG. 2 is a view showing a sequence of winding of a leak detection cable according to the present invention, FIG. 3 is an overall configuration diagram of a leak detection cable according to the present invention to be.

The leakage sensing cable according to the present invention has a pair of leakage sensing lines 20 and 20 ', a pair of complementary supporting lines 30 and 30', and a pair of leakage sensing lines 20 and 30 ' The viscoelastic center line 10 is formed by winding a boom type power source line 40 or 40 'into a spiral shape on the outer surface of the viscoelastic center line 10, ), The shape supporting lines 30, 30 'and the shape-type power source lines 40, 40', the bending property and the elasticity of the shape supporting lines 30, 40 'are effectively utilized to produce an efficient production, a high level of detection stability, .

Accordingly, in the present invention, the leak-sensing center line manufacturing process, the leak detection wire manufacturing process, the shape supporting line manufacturing process, and the boom type power supply line manufacturing process are separately performed, Further, the manufacturing process of the compressed mesh pipe may be performed to complete the leakage sensing cable in which the compression mesh pipe is heated and pressed on the outer surface of the leakage sensing cable.

The manufacturing process for the viscoelastic center line 10 may be performed by twisting a stranded wire extending in a stainless steel into a soft flex shape or by twisting a plurality of strands of an elongated wire after heat treatment of a spring steel or a high carbon steel or a hard steel wire, The viscoelastic coating layer 12 is made of a PVC material having a hardness of R82 to 100 (based on Rockwell hardness R scale). The viscoelastic coating layer 12 is formed by forming a viscoelastic coating layer 12 on the outer surface of the elastic wire 11 made in the form of a spike. And the above hardness has such a soft surface shape as to give a predetermined tackiness.

The elastic wire 11 serves to impart excellent elasticity to the entire leak-sensing cable. The viscoelastic coating layer 12 has leak-sensing wires 20 and 20 'wound on the outer surface in a spiral shape. And the complementary support lines 30 and 30 'and the complementary power supply lines 40 and 40' do not slip relative to each other due to adhesion and fixing of the viscoelastic coating layer 12 to each other.

The manufacturing process of the leak detection lines 20 and 20 'is composed of a single wire sensing wire 21 formed of nickel-chromium wire and a conductive coating layer 22 formed on the surface of the sensing wire 21, The sensing wire 21 may be applied to various conductive materials as a material having excellent conductivity and the conductive coating layer 22 is a polyethylene resin material containing conductive carbon, It is possible to prevent oxidation and corrosion of the sensing wire 21 and to have excellent electrical conduction characteristics.

When the resistance value due to the power source applied to the leak detection lines 20 and 20 'is varied due to the contact with the liquid, the leakage detection lines 20 and 20' The sensing wire 21 and the outer conductive coating layer 22 should have excellent conductivity and the sensing wire 21 may be a nickel-chromium wire or a nickel- It is possible to maintain the wound and wound state naturally on the outer surface of the viscoelastic center line 10 in a spiral shape as it is made of a material having bendability such as copper wire.

In addition, in the manufacturing process of the shape supporting lines 30 and 30 ', the shape-forming wire 31 in the form of a single wire by the metal material having bendability is located inside and the insulating elastic layer 32 is formed on the outer surface of the shape- The insulating elastic layer 32 is formed by using flame-retardant PVC, thereby preventing the occurrence of fire by the movable heat, securing the flexibility of the insulating elastic layer 32, durability, weather resistance, and acid resistance Can be improved.

In the manufacturing process of the boom type power source lines 40 and 40 ', the power source wire 41 in the form of a single wire by the nickel-chromium wire is located inside and the outer surface of the power source wire 41 is coated with the flame- The insulating cover layer 42 is formed to be able to supply power to the leak detecting wires 20 and 20 'through the power supply wire 41 and the insulating cover layer 42 is connected to the leak detecting wires 20 ) 20 'in an insulated state, as well as to prevent a fire caused by a movable heat, to secure flexibility, and to improve durability, weatherability, and acid resistance.

In the manufacturing process of the compression mesh tube 50, the mesh-forming yarns 51 and 51 'are formed by weaving the mesh-forming yarns 51 and 51' The shape of the circular tubular body is obtained. The compression mesh tube 50 formed by the spiral-cross weaving should be made larger than the outer diameter of the leak-sensing cable made by winding the 7-wire cable. Since the compression mesh tube 50 is made of a material having a shrinkage phenomenon upon heating, The shrinkage may cause the shrinkage to be smaller than the outer diameter of the leak-sensing cable by the 7-wire cable.

In order to exhibit such a shrinkage characteristic, it is ideal that the material of the mesh-forming yarns 51 and 51 'is made of a polyolefin-based resin, and a large number of the mesh-forming yarns 51 and 51' The crimped mesh tube 50 having a round tube shape can be completed.

Accordingly, the viscoelastic center line 10, the leak sensing lines 20 and 20 ', the complementary support lines 30 and 30', the complementary power lines 40 and 40 ' When the mesh tubes 50 are separately made, the primary spiral winding process is performed.

That is, in the primary spiral winding step, a pair of leak detecting wires 20 and 20 'are spirally wound around the surface of the contact elastic center line 10, and each of the leak detecting wires 20 and 20' The leak detecting wires 20 and 20 'are wound tightly on the surface of the viscoelastic center line 10 by the inner sensing wires 21 having bendability, And the viscous elastic coating layer 12 of the viscoelastic center line 10 allows the leak detection wires 20 and 20 'to stably maintain a fixed state without flowing.

The two lines of spiral groove portions A 'and A' are formed on the outer surface of the viscoelastic center line 10 by the leakage sensing lines 20 and 20 'spirally wound on the outer surface of the viscoelastic center line 10, ) Will be generated, and the two-wire spiral groove portions A and A 'will also be produced with the same and constant width.

A pair of complementary support lines 30 and 30 'and a pair of complementary power supply lines 40 and 40' are spirally wound in a mixed form with respect to the helical groove portions A and A ' Since the support wires 30 and 30 'and the support wires 40 and 40' have both the bending type support wire 31 or the power supply wire 41 having the bendability, A) (A '), a tight and stable cohesive winding can be achieved.

Here, the first auxiliary supporting line 30 and the first auxiliary auxiliary power supply line 40 are simultaneously and tightly wound around the first helical groove portion A of the helical groove portions A and A ' A second helical winding step in which the second helical supporting line 30 and the second helical type power supply line 40 are coincidentally wound around the second helical groove portion A ' 30 ') and the auxiliary power line (40) are wound tightly and uniformly on the spiral groove portions (A) and (A') so as to have uniform elasticity and bendability in the entire region of the leakage sensing cable This uniform elasticity and bendability minimizes abrupt flow or cable to cable leakage to the leak sensing wires 20 and 20 '.

The leak detection cable formed by the seventh stranded cable formed by performing the second spiral winding process can be used for connection work to one end of the leak detection wires 20 and 20 'and one end of the auxiliary power supply lines 40 and 40' The reference resistance value is detected through the end connection between the leakage sensing lines 20 and 20 'and the power supply using the ends of the complementary power lines 40 and 40' When a leaked liquid changes as a conductor between the leak detecting lines 20 and 20 'and a change in the reference resistance value of the leak detecting lines 20 and 20' occurs, So that it can recognize quickly.

In addition, it is also possible to use the leak detection cable made by the above-described manufacturing process as it is, but the flow of the leak detection wires 20 and 20 'is further suppressed and at the same time, the support lines 30 and 30' As a countermeasure against the flow of the power lines 40 and 40 ', another compression mesh tube 50 may be covered with the leakage sensing cable and fixed by pressing.

That is, as shown in FIGS. 4 and 5, a compression mesh tube 50 'for allowing the leak-sensing cable to be positioned inside a compression mesh tube 50 formed in the shape of an oblique lattice using the mesh- After the inserting process is performed, the crimping mesh tube 50 is twisted so that the mesh-forming yarns 51 and 51 'are inserted between the leakage sensing wires 20 and 20' and the complementary supporting lines 30 and 30 ' To align with the helical direction of the wires 40 and 40 '.

The twisting process of the compression mesh tube may be performed manually, or may be performed using a separate tool or an automatic twisting means. In this case, the plurality of mesh-formed yarns 51 and 51 ' The crimped mesh tube 50 formed by the spiral winding is formed by the twisting process so that a part of the mesh-formed yarns 51 and 51 'is connected to the leak-sensing wires 20 and 20' 30) 30 'and the auxiliary power supply lines 40 (40').

In this state, the compression mesh tube 50 is subjected to the heating process of the compression mesh tube 50 having the shrinkage characteristic by heating, so that the compression mesh tube 50 is shrunk sharply and tightly adhered to the surface of the leakage sensing cable And some of the mesh forming yarns 51 and 51 'are disposed between the leakage sensing wires 20 and 20' and the complementary supporting lines 30 and 30 'and the complementary power lines 40 and 40' 20 'and the complementary supporting lines 30 and 30' and the complementary power source lines 40 and 40 'more tightly and securely while tightly contracting the inside of the formed bones .

When the compression mesh tube 50 is sufficiently shrunk by the above-described heating process of the compression mesh tube, the compression mesh tube 50 in a contracted state through the compression mesh tube cooling process is cured so as to maintain its shape Process.

Accordingly, the compression mesh tube 50 improves the binding force and the shape-retaining force between the cables of the leak detection cable to improve the shape of the leakage detection cable 20 even when the leakage detection cable is bent in various forms or used at a corner or a right- The change in the flow or spacing of the light emitting element 20 'is hardly generated, thereby making it possible to produce a more stable sensing performance.

In addition, the compression mesh tube 50 does not interfere with the leakage of the liquid reaching the leak detection lines 20 and 20 ', and at the same time, due to the physical characteristics of the compression mesh tube 50 itself, It will also serve to protect the surface of each cable and thus contribute to extending the useful life of the leak sensing cable.

The leakage detection system employing such a leak detection cable can be utilized for various purposes as shown in FIG. 7, and can be used for various purposes, such as water and sewage pipes, wastewater pipes, It will be able to be installed in all facilities and equipment expected to be damaged. In case of abnormal situation due to leakage, it can be detected and alerted promptly so that it can be recognized and treated, thereby preventing property damage and even human injury. There will be.

In addition, it can be applied to network, server room, telephone office communication room, exchange machine room and IBS building, and it can be installed outside of chemical storage and chemical transfer piping, underground transfer piping, etc., And it is possible to protect various materials, relics and equipment by installing it on a wall, a ceiling, or a floor of a main data storage room such as a museum and a clean room in a semiconductor factory.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

A, A ': Spiral groove
10: Viscoelastic center line 11: Elastic wire
12: Viscoelastic coating layer
20, 20 ': leak detection wire 21: detection wire
22: Conductive coating layer
30,30 ': Support line 31: Support wire
32: Elastic elastic layer
40,40 ': Boom type power supply line 41: Power supply wire
42: Insulation coating layer
50: pressure squeegee tube 51, 51 ': mesh molding machine

Claims (2)

A viscoelastic center line fabrication process in which an insulating viscoelastic coating layer is formed on the surface of an elastic wire, a leakage sensing wire manufacturing process in which a conductive coating layer is formed on the surface of the conductive sensing wire, and an insulating elastic layer And a method of manufacturing a booster type power supply line which is formed by forming an insulating coating layer on the surface of a conductive power supply wire capable of bending,
A first spiral winding step of spirally winding a pair of leak detecting wires along the longitudinal direction on the surface of the viscoelastic center line at regular intervals;
The second spiral groove portion of the two-wire spiral groove portion due to the leak detection line generated by the first spiral winding is wound around the first spiral groove portion so that one complementary support line and one complementary power supply line are in close contact with each other between the leak- A spiral winding step;
And a third spiral winding step of spirally winding the other helical supporting line and another helical type power supply line so that the other helical supporting line and the other helical type power supply line are brought into close contact with each other between the leak detecting wire and the second helical groove portion of the two helical groove portions. Wherein the liquid leakage sensing cable is formed of a metal.
A viscoelastic center line fabrication process in which an insulating viscoelastic coating layer is formed on the surface of an elastic wire, a leakage sensing wire manufacturing process in which a conductive coating layer is formed on the surface of the conductive sensing wire, and an insulating elastic layer And a method of manufacturing a booster type power supply line which is formed by forming an insulating coating layer on the surface of a conductive power supply wire capable of bending,
A first spiral winding step of spirally winding a pair of leak detecting wires along the longitudinal direction on the surface of the viscoelastic center line at regular intervals;
The second spiral groove portion of the two-wire spiral groove portion due to the leak detection line generated by the first spiral winding is wound around the first spiral groove portion so that one complementary support line and one complementary power supply line are in close contact with each other between the leak- A spiral winding step;
A third spiral winding step of spirally winding the second spiral groove part of the two-wire spiral groove part so that another complementary support wire and another complementary type power supply wire come in close contact with each other between the leak detection wire and the second spiral groove part;
A crimping mesh tube inserting process for covering a crimp mesh tube in the form of a squared lattice on a seven stranded winding cable by one viscoelastic center line, a pair of leak detecting wires, a pair of complementary supporting lines and a pair of complementary power lines;
A crimping mesh tube twisting process for twisting the inserted compression mesh tube to align the mesh shape of the compression mesh tube in a spiral shape so as to be aligned with the spiral shape and position of the leak detection wire and the complementary support wire and the complementary power supply wire;
A compression mesh tube heating step of applying heat to the twisted compression mesh pipe to shrink the compression mesh pipe so that the mesh molding yarn shrinks and adheres to each other between the cables;
And a compression mesh tube cooling step of quickly cooling and curing the hot-pressed compressed mesh tube.

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