JP3141881U - Metal tube heating element connection structure - Google Patents

Abstract

Provided is a metal tube heating element connection structure that prevents a leakage and electric shock from occurring due to moisture absorption at a connection portion where a metal tube heating element and an electric wire are connected, and can be a completely sealed structure.
SOLUTION: A plurality of coated lead wires LW, LW ′, a Y-type connecting member 10 in which a tube branches in three directions and insertion holes 20, 20 ′, 20 ″ are formed in the respective directions. The lead wires LW and LW ′ are respectively inserted into the insertion holes 20 and 20 ′ in the two directions of the Y-type connecting member 10, and the portions of the inserted lead wires LW and LW ′ are peeled off from each other. Connected to the sleeve 30 having one end inserted into the other one-way insertion hole 20 ″ of the Y-type connecting member 01, and the terminal 50 of the metal tube heating element H is connected to the other end of the sleeve 30. It is characterized by being.
[Selection] Figure 3

Description

  The present invention relates to a connection structure of metal tube heating elements used in a metal tube heating element for melting snow, and relates to a connection structure of metal tube heating elements when a plurality of metal tube heating elements are connected in parallel.

  Metal pipe heating elements for melting snow are used on the bottom of concrete or asphalt, such as airport runways, bridges, and parking lots. It is used to prevent slipping phenomenon by connecting in parallel and melting the snow by heating when it snows.

  However, in order to be always embedded in a humid environment, the part where the end portion of the metal tube heating element and the electric wire are connected is required to have a completely sealed structure. If such a sealing structure is not formed, there is a problem that a dangerous element such as a short circuit of an earth leakage breaker or an electric shock occurs due to natural moisture absorption.

  In order to solve such problems, when joining metal tube heating elements in parallel, the connecting part is packed with silicon resin and inserted into the sleeve, and then both ends are compressed to apply silicon. There is a way to do it. As another structure, there is a method in which the connecting portion is molded by resin injection molding.

  However, the structure in which the connecting part is packed with silicon resin, when used in a humid place for a long time, the peeling phenomenon appears due to the physical properties of silicon, so that the insulation resistance gradually decreases due to moisture absorption. I had. In addition, the method of using the connecting part with resin molding is also a resin injection structure, so heat shrinkage occurs when used for a long period of time, and fine gaps occur due to curing phenomenon, resulting in moisture absorption. As a result, the insulation resistance is lowered, and eventually there is a problem that the risk of electric leakage and electric shock is involved.

  Therefore, the present invention has been made in view of such problems, and the purpose of the present invention is that leakage and electric shock may occur due to moisture absorption at the connecting portion where the metal tube heating element and the electric wire are connected. It is intended to provide a metal tube heating element connection structure that can prevent the occurrence of a problem and can provide a completely sealed structure.

  In order to solve the above problems, according to one aspect of the present invention, in a connection structure of metal tube heating elements for connecting a plurality of metal tube heating elements in parallel, a plurality of coated lead wires and three directions A Y-type connecting member having a tube branching and having insertion holes formed in the respective directions, wherein lead wires are respectively inserted into the two-direction insertion holes of the Y-type connecting member, and the inserted lead wires The stripped parts are connected to each other and connected to the sleeve where one end is inserted into the other one-way insertion hole of the Y-shaped connecting member, and the terminal of the metal tube heating element is connected to the other end of the sleeve A connection structure for a metal tube heating element is provided.

  Thus, by connecting each metal tube heating element and the lead wire using a Y-shaped connecting member, and connecting a plurality of metal tube heating elements, connection and connection can be easily and reliably made, Since the connecting portion between the metal tube heating element and the lead wire has a completely sealed structure, the moisture-proof effect is high, and it is possible to prevent electric shocks and leakage accidents. Further, since the connecting work is easy and the working time can be reduced, the cost of the snow melting work can be reduced. Furthermore, since the Y-shaped connecting member is used, there is no risk of deformation even when used for a long period of time, so that the problem that occurs due to moisture absorption from minute gaps can be completely solved.

  A connector bushing is inserted into the other end of the sleeve, and a terminal of the metal tube heating element can be connected to an internal hole of the connector bushing together with an insulating bushing made of a ceramic material. In this way, the terminal of the metal tube heating element can be connected to the other end of the sleeve.

  In addition, a stop projection can be formed on the outer periphery of each end of the Y-shaped connecting member, and the stop projection prevents the tube or protective tube to be put on the connection portion from being removed from the tight contact state. Thus, a tighter bond can be maintained.

  As described above in detail, according to the present invention, when a plurality of metal tube heating elements for melting snow are connected in parallel, each metal tube heating element and a lead wire are connected using a Y-type connecting member. As a result, the metal tube heating elements can be easily and reliably connected, and the connecting portion has a completely sealed structure, so that the moisture-proofing effect is high and accidents of electric shock and leakage can be prevented.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  FIG. 1 is an exploded perspective view of members connected to each other in a metal tube heating element connection structure according to an embodiment of the present invention. FIG. 2 is a perspective view of a connection structure of metal tube heating elements in a connected state. . FIG. 3 is a cross-sectional view of the metal tube heating element connecting structure shown in FIG. 2 cut in the horizontal direction.

  The connection structure of the metal tube heating elements according to the present embodiment includes lead wires (electric wires) LW and LW ′, which are coated wires coated with an insulating film, in order to connect a plurality of metal tube heating elements H in parallel. And a Y-type connecting member 10 which is a pipe material made of a conductive resin and branched in three directions. Insertion holes 20, 20 ′, 20 ″ are formed at the ends of each of the Y-shaped connecting members 10 in the three directions.

  Here, the lead wires LW and LW ′ are respectively inserted into the respective insertion holes 20 and 20 ′ in the two directions of the Y-type connecting member 10, and the coating of the lead wire LW and the lead wire LW ′ is removed. Connect the parts together. One end of a copper sleeve 30 is inserted into the insertion hole 20 ″ in the other direction of the Y-shaped connecting member 10. Then, the portion of the lead wire LW, LW ′ connected to each other from which the coating has been removed is inserted into one end of the sleeve 30 and connected.

  Further, a connector bushing 40 is inserted and connected from the other end of the sleeve 30, and then a terminal 50 of the metal tube heating element H is coupled together with an insulating bushing 60 made of a ceramic material into an internal hole 40 ′ of the connector bushing 40. To be done. After the metal tube heating element H is coupled to the connector bushing 40 in this way, the portion P where the sleeve 30 and the connector bushing 40 are connected and the connection portion of the sleeve 30 and the lead wires LW and LW ′ are connected. The part P is pressurized and pressure-bonded. In this way, the metal tube heating element H can be connected to the lead wires LW and LW ′ via the connector bushing 40 and the sleeve 30.

  Then, the heat-shrinkable tube 70 with the adhesive attached on the inner surface is put on the connecting portion from the metal tube heating element H to the Y-type connecting member 10, and a predetermined temperature is applied to bond the bonding portion in a completely adhered state. Furthermore, after covering the outer surface with the metal material protective tube 80, the predetermined portion P ′ is pressurized and firmly bonded.

  Here, stop projections 90 and 90 'are formed on the outer peripheral portion at the end in the three directions of the Y-shaped connecting member 10, and the heat-shrinkable tube 70 with the inner surface adhesive and the metal material protective tube are formed by the stop projections 90'. 80 can be prevented from escaping from the close contact state, and can be more firmly bonded. Further, the Y-type connecting member 10 into which the lead wires LW and LW ′ are inserted also has a heat-shrinkable tube 70 with an inner surface adhesive at both coupling portions from the lead wires LW and LW ′ to the Y-type connecting member 10. After covering with ', heat at a constant temperature and fix tightly. Again, the stop projection 90 prevents the heat-shrinkable tube 70 from being removed from the state of being in close contact with the Y-type connecting member 10 and can be firmly coupled.

  The operation of the connecting structure of the metal pipe heating elements according to the embodiment of the present invention configured as described above will be described. FIG. 4 is an explanatory diagram showing a state in which a plurality of metal tube heating elements H are connected in parallel and connected at a certain interval using the connection structure of metal tube heating elements according to the present embodiment. As shown in FIG. 4, by arranging the metal tube heating elements H in the horizontal direction at regular intervals and connecting the metal tube heating elements H with the lead wires LW and LW ′, first, the metal tube heating elements H are arranged in three directions. The lead wires LW and LW ′ are inserted into the insertion holes 20 and 20 ′ in two directions of the branched Y-type connecting member 10, and the portions of the lead wire LW and the lead wire LW ′ that have been covered are joined together.

  Next, the joined portion of the lead wire LW and the lead wire LW ′ is inserted and connected from one end into the sleeve 30 inserted into the insertion hole 20 ″ of the Y-type connecting member 10 in the other direction. To do. Further, a connector bushing 40 is inserted and connected to the other end of the sleeve 30, and the terminal 50 of the metal tube heating element H is coupled to the inner hole 40 ′ of the connector bushing 40 together with the ceramic insulating bushing 60. Like that.

  After the coupling, the part P where the sleeve 30 and the connector bushing 40 are connected and the part P where the connection part of the lead wires LW and LW ′ is connected to the sleeve 30 are used using different tools. Pressurize and press.

  Then, the heat-shrinkable tubes 70, 70 ′ with the inner surface adhesive are covered with the above-mentioned pressure-bonded joint portions and the portions where the lead wires LW, LW ′ are inserted into the Y-type connecting member 10, and a predetermined temperature is applied. In order to be completely intimately bonded so that they are completely insulated and sealed. Furthermore, after covering the outer surface of the portion where the heat shrinkable tube 70 is in close contact with the metal material protective tube 80, the predetermined portion P ′ is pressurized and firmly bonded so that it can be protected from external impacts. .

  By connecting the both ends of the metal tube heating element H and the lead wires LW and LW ′ through the above-described process, and also connecting to other metal tube heating elements H, the assembly unit connected in parallel is connected to the bottom surface of the concrete. Asphalt and cement mortar can be applied after arranging the circuit and configuring the circuit by wiring.

  Further, stop projections 90 and 90 'are formed on the outer peripheral portion of each end of the Y-type connecting member 10 of the present invention. The stop projection 90' protects the heat shrinkable tube 70 with the inner surface adhesive and the metal material. Since the tube 80 can be prevented from leaving the tightly bonded state, the tube 80 can be more firmly connected.

  Then, by applying a predetermined temperature to the surface by covering the outer peripheral surface of the lead wires LW and LW ′ inserted into the insertion holes 20 and 20 ′ of the Y-type connecting member 10 with the heat shrinkable tube 70 ′ with an inner surface adhesive. The lead wires LW and LW ′ and the Y-type connecting member 10 are integrated and firmly bonded in a state of being completely adhered by the heat shrinkage action.

  Therefore, by connecting the metal tube heating element H to the lead wires LW and LW ′ as described above, the connection structure for distributing power for supplying power is firmly integrated, and of course a completely sealed state. Since it is a structure, it is possible to prevent leakage and electric shock from occurring due to moisture absorption in the connecting portion.

  In addition, since the connecting work can be performed easily and reliably, and the work time can be reduced, the cost of snow melting work can be reduced. Furthermore, since the Y-type connecting member is not likely to be deformed even if it is used for a long period of time, moisture absorption from a minute gap can be prevented, and all problems caused by the connecting structure can be solved.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention is applicable to a metal tube heating element connecting structure used for a metal tube heating element for melting snow, and applied to a metal tube heating element connecting structure when connecting a plurality of metal tube heating elements in parallel. Is possible.

It is the isolation | separation perspective view which each member isolate | separated in the connection structure of the metal pipe heat generating body by this Embodiment. It is a perspective view which shows the connection structure of the metal pipe heat generating body by this Embodiment. It is sectional drawing which cut | disconnected the connection structure of the metal pipe heat generating body by this Embodiment in the horizontal direction. It is explanatory drawing which shows the state which connected and connected the several metal pipe heat generating body in parallel with a fixed space | interval using the connection structure of the metal pipe heat generating body by this Embodiment.

Explanation of symbols

H Metal tube heating element LW Lead wire LW 'Lead wire 10 Y-type connecting member 20 Insertion hole 20' Insertion hole 20 '' Insertion hole 30 Sleeve 40 Connector bushing 40 'Internal hole 50 Terminal 60 Insulating bushing 70 Heat shrinkable tube 70' Heat Shrinkable tube 80 Metal protective tube 90 Stop projection 90 'Stop projection

Claims (3)

In a connecting structure of metal tube heating elements for connecting a plurality of metal tube heating elements in parallel;
A plurality of coated lead wires;
A Y-shaped connecting member in which a pipe branches in three directions and an insertion hole is formed in each direction;
With
The lead wires are respectively inserted into the insertion holes in the two directions of the Y-type connecting member, and the portions of the inserted lead wires are peeled off and connected to each other, and the other one of the Y-type connecting members is connected. A connecting structure for a metal tube heating element, wherein one end of the metal tube heating element is connected to an insertion hole in a direction, and a terminal of the metal tube heating element is connected to the other end of the sleeve.   2. The metal according to claim 1, wherein a connector bushing is inserted into the other end of the sleeve, and a terminal of the metal tube heating element is connected to an internal hole of the connector bushing together with an insulating bushing made of a ceramic material. Connection structure for tube heating elements. The connection structure for a metal tube heating element according to claim 1 or 2, wherein a stop projection is formed on an outer peripheral portion at each end of each of the Y-shaped connecting members.

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