CN211373867U

CN211373867U - Thermocouple with protective structure

Info

Publication number: CN211373867U
Application number: CN201921927308.5U
Authority: CN
Inventors: 仇国江; 郭军辉
Original assignee: Hebei Jingye Intelligent Technology Co ltd
Current assignee: Hebei Jingye Intelligent Technology Co ltd
Priority date: 2019-11-10
Filing date: 2019-11-10
Publication date: 2020-08-28
Anticipated expiration: 2029-11-10

Abstract

The utility model relates to the technical field of thermocouples, in particular to a thermocouple with a protective structure, which comprises a thermocouple, wherein a sleeve is sleeved on the outer side of the upper end of the thermocouple, the lower end of the sleeve is connected with a sheath through screw threads, the lower end of the thermocouple is positioned in the sheath, the upper end of the sheath is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are both L-shaped, the horizontal pipe body of the first connecting pipe and the horizontal pipe body of the second connecting pipe are at the same height, the upper end of the vertical pipe body of the first connecting pipe is connected with a first cover plate through screw threads, the upper end of the vertical pipe body of the second connecting pipe is connected with a second cover plate through screw threads, the lower end surface of the second cover plate is connected with one end of a spring, when the device is used, the thermocouple is protected, the probe is not easy to corrode, and the durability of the device is improved.

Description

Thermocouple with protective structure

Technical Field

The utility model relates to a thermocouple technical field especially relates to a thermocouple with protective structure.

Background

The thermocouple is a commonly used temperature measuring element in a temperature measuring instrument, directly measures temperature, converts a temperature signal into a thermal electromotive force signal, and converts the thermal electromotive force signal into the temperature of a measured medium through an electric instrument (a secondary instrument). The appearance of various thermocouples is very different according to needs, but the basic structures of the thermocouples are almost the same, and the thermocouples are generally composed of main parts such as a thermode, an insulating sleeve protection tube, a junction box and the like, and are generally matched with a display instrument, a recording instrument and an electronic regulator for use.

The thermocouple can be used in the use process of the electric heating furnace, and the conventional thermocouple generally has the probe extending into water and is easily corroded when being in a humid environment for a long time, so that the thermocouple with a protection structure is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a thermocouple with a protection structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a thermocouple with protective structure, includes the thermocouple, the sleeve pipe has been cup jointed in the outside of thermocouple upper end, sheathed tube lower extreme has the sheath through threaded connection, the lower extreme of thermocouple is located the inside of sheath, the sheath upper end is provided with first connecting pipe and second connecting pipe, first connecting pipe and second connecting pipe are the L type, and the horizontal body of first connecting pipe and the horizontal body of second connecting pipe are in same height, and threaded connection has first apron in the upper end of the vertical body of first connecting pipe, threaded connection has the second apron in the upper end of the vertical body of second connecting pipe, the lower terminal surface of second apron is connected with the one end of spring, the other end of spring is connected with the piston, the lateral wall of piston contacts with the inner wall of second connecting pipe.

Preferably, the outer side of the sleeve is also fixedly provided with a fixing ring.

Preferably, the minimum distance from the lowest end of the sleeve to the fixing ring is smaller than the minimum distance from the highest end of the inner wall of the horizontal pipe body of the first connecting pipe to the fixing ring.

Preferably, the outer wall of the vertical pipe body of the first connecting pipe is sleeved with a circular overflow trough.

Preferably, the material of the sheath is metal copper.

Preferably, heat conducting oil is filled between the sheath and the thermocouple.

The utility model has the advantages that:

1. when the device is used, the thermocouple is protected through the sheath, the probe can be prevented from being in a humid environment for a long time, the probe is not easy to corrode, and the durability of the device is improved.

2. When the device is used, heat conduction oil is filled between the sheath and the thermocouple, the heat conduction effect of the sheath and the heat conduction oil is good, and the temperature in the electric heating furnace can be timely transmitted to the thermocouple.

Drawings

Fig. 1 is a schematic view of a main sectional structure of a thermocouple with a protection structure according to the present invention;

fig. 2 is a schematic front view of a thermocouple with a protection structure according to the present invention;

fig. 3 is a schematic top view of a thermocouple with a protection structure according to the present invention.

In the figure: 1 thermocouple, 2 sleeve pipes, 3 sheaths, 4 first connecting pipes, 5 first cover plates, 6 second connecting pipes, 7 second cover plates, 8 springs, 9 pistons, 10 fixing rings and 11 overflow grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 3, a thermocouple with a protective structure includes a thermocouple 1, a sleeve 2 is sleeved on an outer side of an upper end of the thermocouple 1, the lower end of the sleeve 2 is connected with a sheath 3 through threads, the lower end of the thermocouple 1 is positioned in the sheath 3, the upper end of the sheath 3 is provided with a first connecting pipe 4 and a second connecting pipe 6, the first connecting pipe 4 and the second connecting pipe 6 are both L-shaped, the horizontal pipe body of the first connecting pipe 4 and the horizontal pipe body of the second connecting pipe 6 are at the same height, the upper end of the vertical pipe body of the first connecting pipe 4 is connected with a first cover plate 5 through threads, the upper end of the vertical pipe body of the second connecting pipe 6 is connected with a second cover plate 7 through threads, the lower end surface of the second cover plate 7 is connected with one end of a spring 8, the other end of the spring 8 is connected with a piston 9, and the side wall of the piston 9 is in contact with the inner wall of the second connecting pipe 6.

Further, the outer side of the sleeve 2 is fixedly provided with a fixing ring 10, and the fixing ring 10 is used for limiting the uppermost position of the sheath 3.

Further, the minimum distance from the lowest end of the sleeve 2 to the fixing ring 10 is smaller than the minimum distance from the highest end of the inner wall of the horizontal pipe body of the first connecting pipe 4 to the fixing ring 10, so that the gap between the sheath 3 and the thermocouple 1 is easily filled with the heat conduction oil flowing out of the first connecting pipe 4.

Furthermore, the outer wall of the vertical pipe body of the first connecting pipe 4 is sleeved with a circular overflow trough 11.

Further, the sheath 3 is made of copper.

Further, heat conducting oil is filled between the sheath 3 and the thermocouple 1.

In this embodiment, when this device used, protected thermocouple 1 through sheath 3, can avoid the probe to be in moist environment for a long time for the difficult corruption of probe improves the durability of device.

When the device is used, heat conduction oil is filled between the sheath 3 and the thermocouple 1, the heat conduction effect of the sheath and the heat conduction oil is good, and the temperature in the electric heating furnace can be timely transmitted to the thermocouple.

During the filling conduction oil, open first apron 5 and second apron 7 simultaneously, then pour into the conduction oil into through first connecting pipe 4 to the device in, when waiting that the conduction oil overflows the 6 mouth of pipe of second connecting pipe, stop the oiling, and cover second apron 7, piston 9 can promote the conduction oil this moment, make partial conduction oil spill over from first connecting pipe 4, overflow launder 11 can be collected the conduction oil that spills over, then cover first apron 7 can, reduce the air in the device through the conduction oil, the heat conduction effect is improved.

After the whole device is filled with the heat conduction oil, the volume of the heat conduction oil is 0.5ml-2ml, the heat conduction oil in the device is less, so that the heat quantity which needs to be absorbed or emitted when the temperature of the heat conduction oil is changed is less, and when the external temperature changes, the temperature of the heat conduction oil can be changed rapidly, so that the thermocouple 1 can measure the temperature in time.

When the device is used, after the heat conduction oil is heated and expanded, the spring 8 can be compressed, the piston 9 moves towards the second cover plate 7, and the heat conduction oil can be buffered by a gap between the piston 9 and the second cover plate 7.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A thermocouple with a protection structure comprises a thermocouple (1), wherein a sleeve (2) is sleeved on the outer side of the upper end of the thermocouple (1), and is characterized in that the lower end of the sleeve (2) is connected with a sheath (3) through threads, the lower end of the thermocouple (1) is positioned inside the sheath (3), a first connecting pipe (4) and a second connecting pipe (6) are arranged at the upper end of the sheath (3), the first connecting pipe (4) and the second connecting pipe (6) are both L-shaped, the horizontal pipe body of the first connecting pipe (4) and the horizontal pipe body of the second connecting pipe (6) are at the same height, the upper end of the vertical pipe body of the first connecting pipe (4) is connected with a first cover plate (5) through threads, the upper end of the vertical pipe body of the second connecting pipe (6) is connected with a second cover plate (7) through threads, and the lower end face of the second cover plate (7) is connected with one, the other end of the spring (8) is connected with a piston (9), and the side wall of the piston (9) is in contact with the inner wall of the second connecting pipe (6).

2. A thermocouple with a protective structure according to claim 1, characterised in that a fixing ring (10) is also fixedly arranged on the outside of the sleeve (2).

3. A thermocouple with a shielding structure according to claim 2, characterized in that the minimum distance from the lowermost end of the sleeve (2) to the fixing ring (10) is smaller than the minimum distance from the uppermost end of the inner wall of the horizontal tube body of the first connecting tube (4) to the fixing ring (10).

4. A thermocouple with a protective structure according to claim 3, characterized in that a ring-shaped overflow groove (11) is sleeved on the outer wall of the vertical tube body of the first connecting tube (4).

5. A thermocouple with a shielding structure according to claim 1 or 4, characterised in that the sheath (3) is made of metallic copper.

6. A thermocouple with a protective structure according to claim 4, characterized in that the heat conducting oil is filled between the sheath (3) and the thermocouple (1).