KR20080061557A - Structure and method for connecting detection line - Google Patents

Abstract

A structure and a method for connecting a detection line are provided to obtain electrical connection of the detection line and a clamp, and insulation of a connection portion by preventing the detection line connection portion from being softened. A structure for connecting a detection line includes a pipe-shaped clamp(10) and an external insulation tube(30). The clamp has an inner diameter corresponding to outer diameters of two detection lines(A) from which insulation coat(B) is removed. Tin is plated on a surface of the inner diameter. The external insulating tube has an inner diameter larger than an outer diameter of the clamp to cover the clamp and has a pipe shape. The structure further includes an internal insulation tube(20) which is interposed between the clamp and the external insulation tube, and has an inner diameter corresponding to the outer diameter of the clamp.

Description

Detection line connection structure and connection method {STRUCTURE AND METHOD FOR CONNECTING DETECTION LINE}

1 is a perspective view showing an embodiment of a sensing line connecting structure according to the present invention.

Figure 2 is a perspective view showing another embodiment of the sensing line connection structure according to the present invention.

Figure 3 is a flow chart illustrating a sensing line connection method according to the present invention.

Figure 4 is a perspective view showing the steps S10, S20 in the sensing line connection method according to the invention.

Figure 5 is a perspective view showing the step S30 in the sensing line connection method according to the invention.

Figure 6 is a perspective view showing the step S40 in the sensing line connection method according to the invention.

Figure 7 is a perspective view showing a step S50 in the sensing line connection method according to the invention.

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

10: crimp

20: internal insulation tube

30: outer insulation tube

A: detection line

B: insulation cloth

H: heating part

The present invention relates to a structure for connecting a sensing line having an insulating coating to detect the state of the pipe is inserted into the double or inside the pipe, more specifically, the electrical connection and connection of the sensing line and the crimp by melting the tin plating by heat The present invention relates to a sensing line connection structure and a connection method capable of ensuring insulation of a site.

In general, the sensing line is inserted into the double insulation tube to serve to sense the state of the insulation inside the double insulation tube, for example, the humidity of the insulation. Since the sensing line is disposed long along the inside of the pipe, it is necessary to connect the sensing lines to each other at a predetermined length, and thus, the connection portion of the sensing line is required to have high insulation.

As a method for insulating and connecting the connecting portion of the sensing line, conventionally, the insulation coating ends of the two sensing lines are peeled off and the two sensing lines are connected with the connecting crimp, and then the connecting crimp and the sensing line are connected by inserting a heat shrink tube and heat shrinking. A method of insulating the parts closely has been used.

However, in the heat shrinkable tube, when the continuous use temperature is 85 degrees or more, the heat shrinkage tube hardens and a gap is formed according to the use temperature. The sensing line is used in high temperature pipes, especially in places where the temperature of the pipe is maintained for a long time more than 100 degrees, such as in the case of district heating, there is a problem that softening of the heat shrink tube due to high temperature heat.

In addition, moisture generated due to heat softening penetrates between the heat shrink tube and the sensing line connecting portion, thereby causing a problem of poor insulation of the connecting portion of the sensing line.

Accordingly, there is a problem that the detection line, which serves to detect moisture in the pipe, is difficult to accurately detect the state of the pipe.

In order to solve the above problems, it is an object of the present invention to provide a sensing line connection structure and a connection method so that insulation defects due to hardening does not occur even under various operating temperature conditions.

In addition, an object of the present invention is to provide a sensing line connecting structure and a connecting method capable of maintaining insulation of the sensing line connecting portion at various use temperatures.

Accordingly, an object of the present invention is to provide a sensing line connecting structure and a connecting method for accurately detecting a defect such as moisture in a pipe without error.

In order to solve the above problems, the present invention, in the structure for connecting the two sensing wires that are inserted into the inside of the pipe to detect the condition of the pipe, the outer cover is covered with an insulating coating, each other, A pipe-shaped crimp having an inner diameter corresponding to an outer diameter and plated with tin on an inner diameter surface thereof; It provides a sensing line connecting structure, characterized in that it comprises an outer insulation tube made of a pipe shape having an inner diameter larger than the outer diameter of the crimp to surround the crimp.

At this time, the sensing line connecting structure according to the present invention is interposed between the crimp and the outer insulation tube, it is preferable to further include a pipe-shaped inner insulation tube having an inner diameter corresponding to the outer diameter of the crimp.

The inner insulation tube may be made of the same material as the insulation coating of the sensing line.

At this time, the tin plating of the crimp is formed to a thickness of 20㎛ or more, thereby facilitating the electrical connection of the sensing line.

In addition, the inner insulation tube may be made of fluoroethylene propylene (FEP), the outer insulation tube may be made of polytetrafluoroethylene (PTFE).

On the other hand, the present invention is a method of connecting the two sensing lines that are inserted into the pipe inside and covered with an insulating coating on the outside, so as to sense the state of the pipe, comprising the steps of: removing the insulating coating at the ends of the two sensing lines; Wrapping the sensing line from which the insulation coating has been removed with a crimped pipe shape tin-plated therein so as to connect portions of the two sensing lines to which the insulating coating has been removed; Wrapping the crimp with a pipe-shaped inner insulation tube having an inner diameter equal to the outer diameter of the crimp; It provides a sensing line connecting method comprising the step of enclosing the inner insulation tube with a pipe-shaped outer insulation tube having the same inner diameter as the outer diameter of the inner insulation tube.

At this time, the sensing line connection method according to the present invention may further comprise the step of compressing the crimp after wrapping the sensing line from which the insulation coating is removed.

In addition, according to the present invention, the method of connecting the sensing wires is performed by heating a tin plated inside the crimp to electrically connect the crimp and the sensing wires, and melting the inner insulation tube to be fused with the insulation coating of the sensing wire. It may further comprise the step of heating.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the sensing line connection structure and connection method according to the present invention.

First, the sensing line connecting structure according to the present invention will be described in detail with reference to FIGS. 1 and 2.

1 and 2 are a perspective view showing an embodiment of a sensing line connecting structure according to the present invention.

As shown in FIG. 1, the sensing line connection structure according to the present invention includes a crimp 10 and an outer insulation tube 30.

The crimp 10 has an inner diameter corresponding to the outer diameters of the two sensing lines A from which the insulating coating B is removed, and has a pipe shape in which tin is plated therein. At this time, the tin plating formed on the inner diameter of the crimp 10 is preferably made of a thickness of 20um or more because the electrical connection between the crimp 10 and the sensing line (A) is easy. Since tin melts at about 160 ° C., it can be melted by applying heat of 160 ° C. or higher.

On the other hand, by crimping the crimp 10, the sensing line A and the crimp 10 can be more firmly coupled.

The outer insulation tube 30 has a pipe shape having an inner diameter larger than the outer diameter of the crimp 10, and surrounds the outer diameter of the crimp 10.

In this case, the outer insulation tube 30 may be made of polytetrafluoroethylene (PTFE).

PTFE is a crystalline resin known under the trade name Teflon. It is a plastic with heat resistance, chemical resistance, electrical insulation, high frequency characteristics, non-adhesiveness, and low coefficient of friction, which can withstand long-term use above 260 ° C. PTFE is a crystalline polymer with a melting point of 327 ° C. It is excellent in heat resistance so that it can be stably used at high temperatures. Mountains. The chemical resistance is also superior to alkali and various solvents.

Since the outer insulator tube 30 is used in a high temperature condition as mentioned above, the outer insulator tube 30 shrinks at high temperature, and can make the crimp 10 close to the sensing line A further.

As shown in FIG. 2, the sensing line connection structure according to the present invention may include an inner insulation tube 20.

The inner insulation tube 20 is interposed between the crimp 10 and the outer insulation tube 30 and has a pipe shape having an inner diameter corresponding to the outer diameter of the crimp 10.

The inner insulation tube 20 is also made of the same material as the insulation coating B of the sensing line A, so that it can be fused with the insulation coating B at the time of melting.

In this case, the inner insulation tube may be made of fluoroethylene propylene (FEP).

FEP is a teflon-based high molecular compound and includes one of fluorine-containing compounds. It has a melting point of 250 ° C to 295 ° C and is produced by injection molding or extrusion.

Since the outer insulation tube 30 has heat resistance to withstand high temperatures, the inner insulation tube 20 is melted by applying high temperature heat to the outside of the outer insulation tube 30, that is, the connection portion of the sensing line, so that the insulation coating of the same material is carried out. It is fused with (B), the tin plated in the interior of the crimp 10 is also melted and fused with the sensing line (A). At this time, the material of the tin and the inner insulation tube, for example, the melting point of the FEP, for example, should be heated to 300 ℃ or more. A fluorine-based inner insulation tube 20 other than FEP may be used, and an outer insulation tube 30 of a material different from PTFE may be used. In this case, what is necessary is just to heat below melting | fusing point of the internal insulation pipe | tube 20 or less than melting | fusing point of the external insulation 30.

As such, since the inner insulation tube 20 of the same material as the insulation coating B of the sensing line is melted and fused and formed, the connection portion of the sensing line can be insulated reliably, and the outer insulation tube 30 is heat resistant to withstand high temperatures. Since it is possible to maintain the shape of the molten internal insulating tube 20. In addition, since the outer insulation tube 30 shrinks by about 10% upon heating, the molten inner insulation tube 20 and the insulation coating B may be in close contact with the crimp 10 to increase the insulation effect.

Next, first, the sensing line connecting method according to the present invention will be described in detail with reference to FIGS. 3 to 7.

3 is a flowchart illustrating a sensing line connecting method according to the present invention, FIG. 4 is a perspective view illustrating steps S10 and S20 in the sensing line connecting method according to the present invention, and FIG. 5 is a sensing line connecting method according to the present invention. In the method is a perspective view showing the step S30, Figure 6 is a perspective view showing a step S40 in the sensing line connecting method according to the invention, Figure 7 shows a step S50 in the sensing line connecting method according to the invention Perspective view.

As shown in Figure 3, the sensing line connecting method according to the present invention, the step of removing the insulating coating of the ends of the two sensing lines (S10), the inside of the tin so as to connect the portions in which the insulating coating of the two sensing lines are removed from each other, Step (S20) to wrap the sensing line is removed the insulation coating with the plated pipe-like crimp, step of wrapping the crimp with a pipe-shaped inner insulation tube having the same inner diameter as the outer diameter of the crimp (S30), the outer diameter of the inner insulation tube Comprising a step of wrapping the inner insulation tube with a pipe-shaped outer insulation tube having an inner diameter corresponding to (S40), and heating the outer insulation tube to a predetermined temperature (S50).

As shown in FIG. 4, in step S10, first, the insulation coating B of the connection portion of the two detection lines A is removed, and then, in step S20, the inner diameter of the crimp 10 tin-plated therein is measured by two detection lines ( Insert in A).

As shown in FIG. 5, in step S30, the crimp 10 is inserted into the pipe-shaped inner insulation tube 20 having an inner diameter corresponding to the outer diameter of the crimp 10. In this case, the crimp 10 may be crimped after wrapping the sensing line A from which the insulation coating is removed with the crimp 10. This is because by crimping the crimp 10, the crimp 10 and the sensing line A can be tightly coupled.

As shown in FIG. 6, in step S40, the inner insulation tube 20 is inserted into the pipe-shaped outer insulation tube 30 having an inner diameter corresponding to the outer diameter of the inner insulation tube 20.

Alternatively, it will be understood that the inner insulation tube 20 may be first inserted into the outer insulation tube 30, and then the coupling kit of the outer insulation tube 30 and the inner insulation tube 20 may be fitted to the crimp 10. . In addition, after inserting the sensing wire A into the crimp 10 and not crimping, the crimp 10, the inner insulation tube 20, and the outer insulation tube 30 are manufactured as an integrated kit, and then the kit is sensed (A). ) Can be inserted.

As shown in FIG. 7, in step S50, the external insulation tube 30 is heated to a predetermined temperature.

By heating the outer insulation tube 30 above the melting point of the tin and the inner insulation tube, the tin plated inside the crimp 10 can be melted to electrically connect the crimp and the sensing line, and the inner insulation tube 20 is melted. As a result, the insulating coating B of the sensing line can be fused.

According to this sensing line connection method, since the outer insulation tube has heat resistance to withstand high temperatures, it can maintain the shape of the molten inner insulation tube. The insulation tube and the insulation coating can be made closer to the crimp. This can further increase the insulation effect.

The scope of the present invention is not limited to the above embodiments, but may be embodied in various forms of embodiments within the claims. It will be understood that those skilled in the art to which the invention pertains may fall within the scope of the claims without departing from the gist of the invention as claimed in the claims.

According to the sensing line connecting structure and the connecting method configured as described above, it is possible to prevent the occurrence of insulation defects due to the hardening of the sensing line connecting portion even under a high and low heat condition unlike the conventional art.

In addition, by preventing the hardening of the sensing line connecting portion from occurring, the electrical connection between the sensing line and the crimp and the insulation of the connecting portion can be assured.

Through this, the sensing line has the effect of accurately detecting the moisture state, that is, the insulation state of the pipe insulation.

Claims (9)

In the structure that is connected to the two sensing wires which are inserted inside the pipe to detect the condition of the pipe, covered with an insulating coating on the outside to each other, A pipe-shaped crimp having an inner diameter corresponding to the outer diameter of the two sensing lines from which the insulating coating is removed, and tin-plated on the inner diameter surface; And an outer insulator tube having a pipe shape having an inner diameter larger than an outer diameter of the crimp so as to surround the crimp. The method of claim 1, And a pipe-shaped inner insulation tube interposed between the crimp and the outer insulation tube, the inner insulation tube having an inner diameter corresponding to the outer diameter of the crimp. The method of claim 2, The inner insulation pipe is connected to the sensing line, characterized in that made of the same material as the insulating coating of the sensing line. The method according to any one of claims 1 to 3, Tin plating of the crimp is connected to the sensing line, characterized in that formed in a thickness of 20㎛ or more. The method of claim 4, wherein The inner insulation pipe is connected to the sensing line, characterized in that consisting of fluoroethylenepropylene (Fluoroethylenepropylene, FEP). The method of claim 5, The outer insulation pipe is a sensing line connecting structure, characterized in that made of polytetrafluoroethylene (PTFE). In the method of connecting the two sensing wires which are inserted inside the pipe to detect the condition of the pipe, the two sensing wires are covered with an insulating coating on the outside, Removing the insulating coating at the ends of the two sense lines; Wrapping the sensing line from which the insulation coating has been removed with a crimped pipe shape tin-plated therein so as to connect portions of the two sensing lines to which the insulating coating has been removed; Wrapping the crimp with a pipe-shaped inner insulation tube having an inner diameter corresponding to the outer diameter of the crimp; And a step of wrapping the inner insulation tube with a pipe-shaped outer insulation tube having an inner diameter corresponding to the outer diameter of the inner insulation tube. The method of claim 7, wherein And crimping the crimp after wrapping the sensing line from which the insulation coating is removed. The method of claim 8, And heating the outer insulation tube to a predetermined temperature so that the tin plated inside the crimp is melted to electrically connect the crimp and the sensing line and the inner insulation tube is melted and fused with the insulation coating of the sensing line. How to connect sensing wire.

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