KR102072625B1 - Thermocouple device with function of prevent disconnection - Google Patents

Abstract

The present invention relates to a thermocouple device having a disconnection prevention function. The thermocouple device having a disconnection prevention function comprises: a thermocouple wire having an anode wire and a cathode wire accommodated side by side in a sheath, having the front ends joined and the rear ends exposed out of the sheath; a protection tube to accommodate the thermocouple wire while exposing the rear end of the thermocouple wire to the back; a connection tube which is fixed on the rear end of the protection tube and accommodates the rear end of the thermocouple wire therein; an extension cable having a relatively large diameter compared to the anode wire and the cathode wire, including an extension anode wire and an extension cathode wire enclosed in a sheath, and having an end inserted into the connection tube; a connection maintaining unit which is installed in the connection tube and electrically connects the extension cable and the thermocouple wire; and a fixing means to fix the connection maintaining unit to prevent disconnection due to separation of the connection maintaining unit from the thermocouple wire by an external force. The thermocouple device having a disconnection prevention function prevents the extension cable connected to the thermocouple wire in the connection tube from being moved by a tensile force applied from the outside. Therefore, disconnection of the extension cable from the thermocouple wire is prevented to eliminate disconnection-related faults, thereby improving reliability and extending life.

Description

Thermocouple device with function of prevent disconnection

The present invention relates to a thermocouple device, and more particularly, to a thermocouple device having a disconnection prevention function capable of preventing disconnection of thermocouple wires having different thicknesses and extension cables.

Thermocouples, which are widely used as temperature measuring means in the industrial field, have a basic structure in which one end of a metal wire of different physical properties is joined and the other end is connected to a temperature data logger or an extension cable or other equipment. It is used by bringing the junction into contact with the temperature measurement object. This is the application of the Seebeck effect, in which electric current flows by the thermoelectric power when the end of the joined metal wire is heated. The structure is relatively simple and the temperature measurement range is very wide.

The thermocouple may be classified into a general type and a sheath type according to the protection form of the metal wire. The general type is configured by combining a protective tube, a metal wire, an insulated tube, a terminal box, and the like, and the sheath type is integrally formed with a protective tube and an insulating material such as metal wire and magnesium oxide (MgO). The sheath type is characterized by good mechanical durability and bendability.

In addition, among the cis type thermocouples, the K type type in which the metal wire is made of chromel and amelel is used. Type K thermocouples can measure up to a high temperature of about 1200 ° C, have good heat and corrosion resistance, and high reliability.

1 is a perspective view showing a conventional thermocouple 10, Figure 2 is a partial cross-sectional view for explaining the problem of the thermocouple shown in FIG.

As shown in the drawing, the conventional thermocouple 10 includes a protective tube 11 extending in the longitudinal direction, a thermocouple wire 14 accommodated in the protective tube 11, and an extension connected to the rear end of the thermocouple wire. A support spring for accommodating and protecting the cable 16, the thermocouple wire 14 and the connecting portion 17 of the extension cable 16, and a support spring for fitting the connecting tube 12a to support the extension cable 16. (13) is provided.

The thermocouple wire 14 extends in parallel with each other and accommodates the positive electrode wire 14a and the negative electrode wire 14b to which the extension ends are connected, and the positive electrode wire 14a and the negative electrode wire 14b. It has the sheath 14c holding. The cathode small wire 14a is chrommel, the cathode small wire 14b is armel, and the sheath 14c is inconel 600.

The extension cable 16 is composed of an extension anode line 16a, an extension cathode line 16b, and a teflon coating 16c. The extended cathode wire 16a is connected to the anode small wire 14a, and the extended cathode wire 16b is connected to the cathode small wire 14b by welding. In addition, the extension anode line 16a is made of chromel similarly to the anode element line 14a, and the extension cathode line 16b is made of armel in the same manner as the cathode element line 14b.

The ends of the thermocouple wire 14 and the extension cable 16 are connected inside the connecting tube 12a and embedded in the sealing epoxy 12b. The sealing epoxy 12b is injected into the connection tube 12a and cured to have a purpose of suppressing relative movement of the extension cable 16 with respect to the thermocouple wire 14.

However, the conventional thermocouple 10 has a problem that the adhesion between the sealing epoxy 12b and the Teflon coating 16c is not good and the sealing epoxy 12b does not function as it should. In other words, the sealing epoxy 12b stably holds and secures the extension cable 16. The reason is that the Teflon itself, which forms the Teflon coating 16c, has a slippery property.

Thus, when the thermocouple 10 is used, for example, when the extension cable 16 is pulled in the direction of arrow a, most of the tensile force applied to the extension cable 16 is transmitted to the connecting portion 17, so that the connection portion, i.e., extension The connection portion between the positive electrode line 16a and the positive electrode line 14a, the extended negative electrode line 16b and the negative electrode line 14b, or the positive electrode line 14a or the negative electrode line 14b itself can be easily cut.

This cutting problem occurs more frequently as the thickness difference between the positive electrode 14a and the negative electrode 14b is greater than that of the extended anode line 16a and the extended cathode line 16b. When welding by applying welding heat in a state in which metal wires having different thicknesses are overlapped, the thin metal wires are relatively largely thermally damaged and the load-bearing capacity is lowered, so that the positive electrode 14a or the negative electrode 14b itself is easily cut.

This disconnection phenomenon, whether the welding portion of the thermocouple wire 14 to the extension cable 16 is broken or the positive wire 14a or the negative wire 14b itself is cut, is caused by the movement of the extension cable 16. . Even if an external force is applied, the disconnection does not occur unless the extension cable 16 is moved.

However, as described above, in the case of the extension cable 16 having the Teflon material as the sheath, the Teflon sheath 16c of the extension cable 16 is slippery, and the sealing epoxy 12b firmly holds and secures the extension cable 16. Since it is impossible to do so, the disconnection of the connecting portion 17 remains a problem which is almost inevitable.

Domestic Patent Publication No. 10-0859631 (Thermocouple holder with improved coupling structure) Domestic Patent Publication No. 10-1902334 (Thermocouple Assembly) Korean Laid-Open Patent Publication No. 10-2007-0080113 (Thermocouple device with contact protection means)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a thermocouple device having a reliable disconnection prevention function because a disconnection of an extension cable with respect to a thermocouple wire is prevented and there is no failure associated with disconnection.

Thermocouple device having a disconnection prevention function of the present invention as a means for solving the problem for achieving the above object, the longitudinally extending sheath, is always accommodated side by side inside the sheath, the front end is joined and the rear end is outside the sheath A thermocouple wire having exposed anode wires and cathode wires; A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear; A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein; An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube; A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire; And fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by external force, wherein the fixing means is hardened after being injected into the connection tube and connected to the connection tube. Epoxy fixed in the said connection holding part; A body buried in the epoxy, a state fixed to the body, one end of which is connected to the anode wire, the other end of which is connected to the extension anode wire, and the first connection wire fixed to the body together with the first connection wire One end thereof is connected to the cathode element wire, and the other end thereof has a second connection line connected to the extended cathode line.
In addition, the body is made of ceramic and has a plurality of through passages, the first connecting line and the second connecting line has the same thickness as the extension anode line and the extension cathode line, it is sewn in each through hole to maintain a fixed state .
In addition, the thermocouple device having a disconnection prevention function of the present invention as a means for solving the problem for achieving the above object is accommodated side by side in the sheath extending longitudinally, always the sheath, the front end is joined and the rear end is sheath A thermocouple wire having an anode wire and a cathode wire exposed to the outside; A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear; A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein; An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube; A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire; And fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by external force, wherein the fixing means is hardened after being injected into the connection tube and connected to the connection tube. It is an epoxy fixed in the inside, The connection holding portion includes a body having a plurality of through passages embedded in the epoxy and fixed, the extension anode line and the extension cathode line of the extension cable is sewn in the through passage formed in the body The ends thereof are fixed to the positive electrode wire and the negative electrode wire, and are connected to the positive electrode wire and the negative electrode wire, respectively.
In addition, the surface of the body is formed with an uneven portion for increasing the bonding force of the epoxy to the body.
In addition, the thermocouple device having a disconnection prevention function of the present invention as a means for solving the problem for achieving the above object is accommodated side by side in the sheath extending longitudinally, always the sheath, the front end is joined and the rear end is sheath A thermocouple wire having an anode wire and a cathode wire exposed to the outside; A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear; A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein; An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube; A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire; A fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by an external force, wherein the connection holding portion; A hollow pipe-shaped member having a center hole penetrated through a central shaft portion, the outer body having a first wiring groove extending in a curved shape on its outer circumference, and being inserted into the center hole and curved on its outer circumference. An inner body having a second wiring groove extending in a shape, wherein the extension anode line or the extension cathode line is connected to the first wiring groove and supported at an end thereof to the anode wire or the cathode wire; The extended cathode wire or the extended cathode wire is connected to the cathode element wire or the anode element wire in the state in which the extension cathode wire or the extension anode wire is inserted into and supported in the second wiring groove, and the fixing means includes; The outer body and the interbody assembly is an epoxy that is cured after being injected into the connection tube while being positioned in the connection tube to fix the assembly in the connection tube.
In addition, the epoxy is a transparent epoxy, one side of the connection tube; An inspection window is formed to visually check the connection state of each of the positive electrode wire and the negative electrode wire, and at the side of the inspection window; A rotatable door for opening and closing the inspection window and a torsion hinge supporting the door to be rotatable and supporting the door so as to be elastically biased toward the connection tube side are provided.

delete

delete

delete

delete

delete

delete

In the thermocouple device having a disconnection preventing function of the present invention as described above, since the extension cable connected to the thermocouple wire inside the connection tube does not move by a tensile force applied from the outside, the thermocouple device is connected to the thermocouple wire. Since disconnection is prevented, there is no failure associated with disconnection, so it is reliable and has a long service life.

1 is a perspective view showing a conventional thermocouple.
FIG. 2 is a partial cross-sectional view illustrating a problem of the thermocouple shown in FIG. 1.
3 is a cross-sectional view illustrating an internal configuration of a thermocouple device having a disconnection prevention function according to an embodiment of the present invention.
4 is a perspective view of the thermocouple device shown in FIG. 3.
5 is a view separately showing the connection holding unit shown in FIG.
6 is a perspective view illustrating the body of FIG. 5.
7 is a perspective view showing another example of the connection holding unit shown in FIG. 3.
8 to 10 are views showing a modification of the body.
11 and 12 show still another example of the connection holding unit.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view for explaining the internal configuration of the thermocouple device 20 having a disconnection prevention function according to an embodiment of the present invention, Figure 4 is a perspective view of the thermocouple device shown in FIG. 5 is a view showing the connection holding portion 30 shown in FIG. 3 separately, and FIG. 6 is a perspective view showing the body 31 of FIG.

Hereinafter, the same reference numerals as the above reference numerals refer to the same members having the same function, and repeated description thereof will be omitted as much as possible.

As shown, the thermocouple device 20 according to the present embodiment, the thermocouple wire 14, the protective tube 11, the connecting tube 23, the extension cable 16, the connection holding portion 30, It has a configuration including a fixing means.

First, the thermocouple wire 14 includes a sheath 14c, which is a linear member made of Inconel 600, and an anode wire 14a and a cathode wire (side) mounted side by side inside the sheath 14c. 14b). The tip end portions of the positive electrode 14a and the negative electrode 14b are joined.

The thermocouple wire 14 is accommodated inside the protective tube 11 and its rear end is exposed to the rear of the protective tube 11. In particular, the positive electrode wire 14a and the negative electrode wire 14b extend outward from the sheath 14c.

The connecting tube 23 is a cylindrical member closely fixed to the rear end of the protective tube 11 to accommodate the connection holding portion 30 and the transparent epoxy 24 as a fixing means therein.

In particular, one side of the connection tube 23, as shown in Figure 4, the inspection window 23b and the door 23c is provided. The inspection window 23b is a through hole formed in the connection tube 23 itself. The position of the inspection window 23b corresponds to the positive electrode wire 14a and the negative electrode wire 14b exposed to the rear end of the thermocouple wire 14. In other words, the positive electrode 14a and the negative electrode 14b can be visually checked through the inspection window 23b. The size or number of the inspection window 23b may vary depending on the case.

The door 23c is a cover for opening and closing the inspection window 23b. The inspection window 23b is covered by the door 23c and can be closed or opened. The door 23c is a plate member having a width that can cover the inspection window 23b, and is mounted on the outer circumferential surface of the connection tube 23 through the torsion hinge 23f. The torsion hinge 23f serves as a rotation axis of the door 23c and elastically supports the door 23c in the direction of the arrow z. The door 23c is elastically biased toward the inspection window 23b by the torsion hinge 23f.

In addition, a fitting protrusion 23d is provided at the free end of the door 23c, and a support groove 23e is formed in the connecting tube 23. The support groove 23e is a hole into which the fitting protrusion 23d is fitted. That is, when the door 23c is rotated in the direction of the arrow z and pressed toward the connecting tube 23 side, the fitting protrusion 23d is fitted into the support groove 23e as if the snap button is filled. When the door 23c is pulled in the direction opposite to the arrow z direction by applying a force, the fitting protrusion 23d is separated from the support groove 23e, and the inspection window 23b is opened.

The door 23c blocks the inspection window 23b when the transparent epoxy 24 is injected into the connection tube 23 to prevent the transparent epoxy 24 from flowing out.

The front end of the extension cable 16 passes through the support spring 13 and then enters the connection tube 23. The extension cable 16 consists of a Teflon coating 16c, an extension anode line 16a, and an extension cathode line 16b. The thickness of the extended positive electrode line 16a and the extended negative electrode line 16b is relatively thicker than the positive electrode 14a and the negative electrode 14b. A data logger may be connected to the rear end of the extension cable 16.

Meanwhile, the connection holding unit 30 and the fixing unit electrically connect the extension cable 16 and the thermocouple wire 14 while being installed inside the connection tube 23. The positive wire 14a and the negative wire It serves to prevent the disconnection of (14b).

That is, the connection holding portion 30 is to connect the extension cable 16 and the thermocouple wire 14, the fixing means is to prevent the disconnection of the connection holding portion 30 to block the disconnection.

The fixing means is a transparent epoxy 24 which is hardened after being injected into the connection tube 23, and fixes the connection holding portion 30 so that the connection holding portion 30 is removed from the thermocouple wire 14 by an external force. Prevent short circuits. The connection portion of the extension cable 16 and the connection holding portion 30, the connection portion of the connection holding portion 30 and the thermocouple wire 14 and the connection holding portion 30 itself are embedded in the transparent epoxy 24. Sealed and kept in place.

As mentioned above, by the action of the transparent epoxy 24, the distance of the thermocouple wire 14 to the connection holding portion 30 is kept constant. For example, even when the thermocouple device 20 is in use, even if a tensile force in the arrow a direction is applied to the extension cable 16, the connection holding portion 30 does not move in the arrow a direction. This means that the tensile force is not applied to the positive electrode wire 14a or the negative electrode wire 14b in a state of being connected to the connection holding part 30, so that disconnection or cutting of the positive electrode wires 14a and 14b may not occur. .

As mentioned above, in the conventional thermocouple device (10 in FIG. 1), when the tensile force in the direction of arrow a in FIG. 1 is applied, the extension cable 16 is taken out and the positive cathode wires 14a and 14b are easily cut.

As shown separately in FIGS. 5 and 6, the connection holding unit 30 includes a body 31 having a substantially cylindrical shape, and first and second connecting lines 37 and 38. The body 31 is made of ceramic and has first and second anode passages 35a and 35b and first and second cathode passages 36a and 36b therein. The first and second anode passages 35a and 35b and the first and second cathode passages 36a and 36b are through passages having the same inner diameter and are parallel to each other and open to both ends of the body 31. The size of the body 31 can vary as needed.

The first connection line 37 is a conductive line connecting the extension anode line 16a and the anode element line 14a. The first connection line 37 has the same thickness as the extension anode line 16a and is made of chrome. Similarly, the second connection line 38 is a conductive line connecting the extension cathode line 16b and the cathode element line 14b and has the same thickness as the extension cathode line 16b. The second connecting line 38 is made of chrome.

The first and second connection lines 37 are sewn and fixed to the first and second cathode passages 35a and 35b and the first and second cathode passages 36a and 36b.

That is, the first connection line 37 enters the first anode passage 35a opened to one end 33a of the body 31, passes through the body, bends in the opposite direction, and then the second cathode passage 35b. ) Is sewn in such a way as to pass through the body 31. Similarly, the second connecting line 38 enters the first cathode passage 36a opened toward one end face 33a of the body 31, passes through the body 31, and then faces outward from the other end face 33b. Bent into the second cathode passage 36b which is bent to the end surface 33a and then extended to the opposite side.

Both ends of the first and second connection lines 37 and 38 supported by the body 31 are electrically connected to the extension cable 16 and the thermocouple wire 14.

FIG. 7 is a perspective view showing another example of the connection holding part 30 shown in FIG. 3.

The connection holding part 30 shown in FIG. 7 is provided with the body 31 which passes and supports the said extended anode line 16a and the extended cathode line 16b directly. The connection holding part 30 described with reference to FIG. 5 has a configuration of a body 31 and first and second connection lines 37 and 38, and the first and second connection lines 37 and 38 are connected to the extension cable 16. The connection holding unit 30 of FIG. 7 is directly connected to the extension cable 16.

With the extended anode line 16a and the extended cathode line 16b of the extension cable 16 exposed for a long time, the extended anode line 16a passes through the first anode passage 35a and the second anode passage 35b in turn, The extension cathode wire 16b is passed through the first cathode passage 36a and the second cathode passage 36b in turn, and then connected to the anode element wire 14a and the cathode element wire 14b, respectively, to prevent the desired purpose, that is, prevention of disconnection. Can achieve the purpose.

8 to 10 show a modified example of the body 31.

The body 31 shown in FIG. 8 has many uneven parts on the outer peripheral surface. The uneven portion is composed of a parallel projecting ring portion 31a having a constant pitch and a groove portion 31b between the projecting ring portion 31a. The transparent epoxy 24 surrounding the body 31 is cured in a state that penetrates into the groove 31b and suppresses the movement of the body 31 inside the connection tube 23 to the maximum.

9, it can be seen that the teeth 31c are formed on the outer circumferential surface of the body 31. The tooth part 31c serves as an uneven part for supporting the body 31 so that the extension cable 16 is not pulled out when the extension cable 16 is tensioned in the direction of arrow a in FIG. 3.

Meanwhile, as shown in FIGS. 10A and 10B, the body 31 may take the form of a cube. Referring to FIG. 10A, it can be seen that the anode line 35 and the cathode line 36 are symmetrically formed in the hexahedral body 31 extending in the longitudinal direction.

First, second and third positive electrode paths 35a, 35b and 35c are formed in the positive electrode path 35 and first, second and third negative electrode paths 36a, 36b and 36c are formed in the negative electrode path 36 in parallel. have. The first connecting line 37 is inserted into the positive electrode passage 35, and the second connecting line 38 passes through the negative electrode passage 36.

10B is a cross-sectional view illustrating a portion of the anode line passage 35. As shown, the first connecting line 37 is bent 180 degrees after passing through the first positive electrode path 35a to pass through the second positive electrode path 35b and bent 180 degrees again to pass through the third positive electrode path 35c. Sewed in a manner and fixed. The fixing method of the second connection line 38 with respect to the cathode ray passage 36 is also the same.

11 and 12 show still another example of the connection holding portion 40. FIG. 11 is an exploded perspective view of the connection holding portion 40, and FIG. 12 shows an extension anode line 16a at the connection holding portion 40. FIG. ) And the extended cathode ray line 16b are applied. Although the extended anode line 16a and the extended cathode line 16b are applied to FIG. 12, the first and second connection lines 37 and 38 described above may be applied as necessary.

As shown in FIG. 11, the connection holding portion 40 includes a hollow outer body 42 and an inner body 44.

The outer body 42 has a center hole 42a and a locking jaw portion 42b having a predetermined inner diameter at a central axis thereof. The center hole 42a accommodates the inner body 44 as a through path penetrating the central axis of the outer body 42 in the longitudinal direction. In addition, the locking jaw portion 42b is a groove for accommodating and supporting the head portion 44c.

In particular, the first wiring groove 42c is formed on the outer circumferential surface of the outer body 42. The first wiring groove 42c is a recessed linear groove formed on the outer circumferential surface of the outer body 42. The first wiring groove 42c extends in the longitudinal direction from one end of the outer body and rotates about one lap in the circumferential direction from the middle portion, and then the other end thereof. Have an elongated shape. As shown in FIG. 7, the extended positive bipolar wire 16a is embedded in the first wiring groove 42c and fixed. The extended anode line 16a inserted into the first wiring groove 42c maintains a fixed state inside the first wiring groove 42c through, for example, an adhesive means.

In addition, the inner body 44 has a diameter extending in the longitudinal direction and can be inserted into the center hole 42a, and includes a head portion 44c at one end. The head portion 44c is a portion to which the inner body 44 is fitted into the locking jaw portion 42b in a state where the inner body 44 is inserted into the center hole 42a.

A curved string second wiring groove 44b is engraved on the outer circumferential surface of the inner body 44. The second wiring groove 44b is a linear groove into which the extension cathode wire 16b is fitted, and the shape thereof may be changed in various ways. In FIG. 12, the second wiring groove 44b has a spiral shape.

Reference numeral 44d denotes an eccentric hole. The eccentric hole 44d is a hole through which the extended cathode wire 16b inserted into the second wiring groove 44b passes. The extended cathode wire 16b fitted into the second wiring groove 44b passes through the eccentric hole 44d and is connected to the cathode element wire 14b.

In the above description, although the extension anode line 16a is inserted into the first wiring groove 42c and the extension cathode line 16b is inserted into the second wiring groove 44b, on the contrary, the extension cathode wire is inserted into the first wiring groove 42c. Of course, the extension anode line 16a may be fixed to the second wiring groove 44b.

The connection holding portion 40 having the above configuration is a thermocouple wire in a state in which the interbody 44 is coupled to the outer body 42 in a state of being sealed and fixed by the transparent epoxy 24 in the connection tube 23. (14) and the extension cable 16 are stably connected.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

10: Thermocouple 11: Protective tube
12a: Connection tube 12b: Sealed epoxy 13: Support spring
14: thermocouple wire 14a: anode wire 14b: cathode wire
14c: Sheath 16: Extension cable 16a: Extension bipolar cable
16b: extended cathode wire 16c: Teflon coating 17: connection
20: Thermocouple device 23: Connection tube 23b: Inspection window
23c: door 23d: fitting protrusion 23e: support groove
23f: torsion hinge 24: transparent epoxy 30: connection holding part
31: body 31a: protrusion ring 31b: groove
31c: Tooth part 33a: One end 33b: The other end
35: positive electrode passage 35a: first positive electrode passage 35b: second positive electrode passage
35c: third anode passage 36: cathode line passage 36a: first cathode passage
36b: second negative electrode path 36c: third negative electrode path 37: first connection line
38: 2nd connection line 40: Connection holding part 42: Outer body
42a: center hole 42b: locking jaw 42c: first wiring groove
44: Interbody 44b: Second wiring groove 44c: Head portion
44d: Eccentric hole

Claims (7)

delete A thermocouple wire having a sheath extending in the longitudinal direction, which is housed side by side in a sheath and whose front end is joined and whose rear end is exposed to the outside of the sheath;
A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear;
A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein;
An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube;
A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire;
And fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by an external force.
The fixing means is an epoxy that is hardened after being injected into the connection tube to fix the connection holding part in the connection tube,
The connection holding unit;
A body buried in the interior of the epoxy,
A first connection line fixed to the body, one end of which is connected to the anode small wire and the other end of which is connected to an extended anode wire;
A thermocouple device having a disconnection prevention function, the second coupling line being fixed to the body together with the first connecting line, one end of which is connected to the cathode element wire, and the other end of which is connected to the extension cathode wire. The method of claim 2,
The body is made of ceramic and has a plurality of through passages,
The first connection line and the second connection line, the thermocouple device having the same thickness as the extension anode line and the extension cathode line, and has a disconnection prevention function to be sewed in each through hole to maintain a fixed state. A thermocouple wire having a sheath extending in the longitudinal direction, which is housed side by side in a sheath and whose front end is joined and whose rear end is exposed to the outside of the sheath;
A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear;
A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein;
An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube;
A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire;
And fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by an external force.
The fixing means is an epoxy that is hardened after being injected into the connection tube to fix the connection holding portion in the connection tube,
The connection holding part includes a body having a plurality of passages and embedded in the epoxy and fixed thereto,
An extension anode wire and an extension cathode wire of the extension cable are sewn and fixed to the through-path formed in the body, and an end thereof has a disconnection prevention function connected to the anode wire and the cathode wire by extending toward the cathode wire and the cathode wire. Couple device. The method according to any one of claims 2 to 4,
Thermocouple device having a disconnection prevention function is formed on the surface of the body to increase the coupling force of the epoxy to the body. A thermocouple wire having a sheath extending in the longitudinal direction, which is housed side by side in a sheath and whose front end is joined and whose rear end is exposed to the outside of the sheath;
A protective tube accommodating the thermocouple wire and exposing the rear end of the thermocouple wire to the rear;
A connection tube fixed to a rear end of the protective tube and accommodating a rear end of the thermocouple wire therein;
An extension cable having a relatively larger diameter than the positive electrode wire and the negative electrode wire, having an extension anode wire and an extension cathode wire wrapped in a sheath, and whose ends are inserted into the connection tube;
A connection holding part installed inside the connection tube to electrically connect the extension cable and the thermocouple wire;
And fixing means for fixing the connection holding portion to prevent the connection holding portion from being shorted from the thermocouple wire by an external force.
The connection holding unit;
A hollow pipe type member having a center hole penetrated through a central shaft, the outer body having a first wiring groove extending in a curved shape on an outer circumferential surface thereof;
The inner body is inserted into the center hole, and has an inner body having a second wiring groove extending in a curved shape on an outer circumferential surface thereof.
The extended cathode wire or the extended cathode wire is connected to the anode wire or the cathode wire while its end is inserted into and supported by the first wiring groove.
The extended cathode wire or the extended cathode wire is connected to the cathode element wire or the anode element wire in an end thereof while being supported by the second wiring groove.
The fixing means;
The thermocouple device having a disconnection prevention function of epoxy which fixes the outer body and the interbody assembly in the connection tube and is cured after being injected into the connection tube to fix the assembly in the connection tube. The method according to any one of claims 2 or 4 or 6,
The epoxy is a transparent epoxy,
On one side of the connection tube;
An inspection window is formed to visually check the connection state of each of the positive electrode wire and the negative electrode wire,
At the side of the inspection window;
A rotatable door for opening and closing the inspection window,
A thermocouple device having a disconnection prevention function for supporting the door to be rotatable and having a torsion hinge for supporting the door to be elastically biased toward the connecting tube.

Images