Armored thermocouple

Abstract

The utility model belongs to the technical field of temperature measurement, and particularly discloses an armored thermocouple, which comprises an armored cable, a compensating lead and a protective cap, a core wire of the armored cable is connected with a lead of the compensating lead, and the protective cap is sleeved at the connection position; a glue injection opening is formed in the side face of the protective cap and used for injecting reinforcing glue into the protective cap. The protective cap comprises a first straight cylinder, a contraction cylinder and a second straight cylinder which are connected in sequence, the diameter of the first straight cylinder is larger than that of the second straight cylinder, the first straight cylinder is connected with the large-diameter end of the contraction cylinder, and the second straight cylinder is connected with the small-diameter end of the contraction cylinder; the compensation lead and the first straight cylinder are on the same side, and the armored cable and the second straight cylinder are on the same side. The protective cap is provided with the glue injection port, so that horizontal glue sealing can be realized, the armored cable is in a straight state, and later direct assembly is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature measurement, in particular to an armored thermocouple. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measurement instruments. They measure temperature directly and convert the temperature signal into a thermoelectric potential (EMF). This is then converted into the temperature of the medium being measured via an electrical instrument (secondary instrument). Because they are active sensors, they require no external power supply and are very convenient to use. Therefore, they are often used to measure the temperature of gases or liquids in furnaces and pipelines, as well as the surface temperature of solids.

[0003] Current thermocouple structures consist of an armored cable and a compensating conductor. Two core wires extend from one end of the armored cable, while two lead wires extend from the other end of the compensating conductor. The two core wires correspond to the two lead wires, and the two corresponding core wires and lead wires are secured together by spot welding. To reinforce the connection between the core wires and the lead wires, a protective cap is placed at the connection, and insulating or heat-resistant adhesive is injected into the cap for sealing and reinforcement.

[0004] Currently, the primary sealing method is vertical sealing, where glue is injected from the port of the protective cap. For very long armor pieces (e.g., 4 meters), the armor needs to be coiled to reduce its height, which then requires re-alignment before insertion into the casing, resulting in low production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide an armored thermocouple to solve the problem that when a very long thermocouple is sealed in a vertical sealing manner, the armor material needs to be looped to reduce the height, and later it needs to be straightened before being installed in the sleeve, resulting in low production efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: an armored thermocouple, comprising an armored cable, a compensation wire and a protective cap, the core wire of the armored cable and the lead wire of the compensation wire are connected, and the protective cap is sleeved on the connection position; a glue injection port is provided on the side of the protective cap, and the glue injection port is used to inject reinforcing glue into the protective cap.

[0007] Furthermore, the protective cap includes a first straight cylinder, a shrinking cylinder and a second straight cylinder connected in sequence, the diameter of the first straight cylinder is larger than the diameter of the second straight cylinder, the first straight cylinder is connected to the large diameter end of the shrinking cylinder, and the second straight cylinder is connected to the small diameter end of the shrinking cylinder; the compensation wire is on the same side as the first straight cylinder, and the armored cable is on the same side as the second straight cylinder.

[0008] Furthermore, the length of the first straight tube is greater than the total length of the second straight tube and the shrinking tube.

[0009] Furthermore, the glue injection port is arranged on the first straight cylinder.

[0010] Furthermore, the outer length of the glue injection port is greater than the inner length, and both ends of the glue injection port are inclined.

[0011] Furthermore, the protective cap is made of a stainless steel tube.

[0012] The beneficial effect of this technical solution is that: in this technical solution, a glue injection port is provided on the protective cap, which can achieve horizontal glue sealing, and the armored cable is in a straight state, which is convenient for direct assembly in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an armored thermocouple of the utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the protective cap structure. DETAILED DESCRIPTION

[0015] The following is further described in detail through specific implementation methods:

[0016] The reference numerals in the drawings of the specification include: armored cable 1, compensation conductor 2, protective cap 3, core wire 4, lead wire 5, reinforcing glue 6, first straight tube 7, shrinking tube 8, second straight tube 9, and glue injection port 10.

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The embodiment is basically as shown in the attached Figure 1-2 As shown: An armored thermocouple includes an armored cable 1, a compensation conductor 2, and a protective cap 3. The core wire 4 of the armored cable 1 and the lead wire 5 of the compensation conductor 2 are welded, and the protective cap 3 is mounted on the welding position. The protective cap 3 is made of a stainless steel tube and includes a first straight tube 7, a reduction tube 8, and a second straight tube 9 connected in sequence. The length of the first straight tube 7 is greater than the total length of the second straight tube 9 and the reduction tube 8. The diameter of the first straight tube 7 is greater than the diameter of the second straight tube 9. The first straight tube 7 is connected to the large-diameter end of the reduction tube 8, and the second straight tube 9 is connected to the small-diameter end of the reduction tube 8. The interior of the second straight tube 9 is provided with a reduction on the side away from the reduction tube 8. The compensation conductor 2 is on the same side as the first straight tube 7, and the armored cable 1 is on the same side as the second straight tube 9. A glue injection port 10 is provided on the first straight tube 7. The glue injection port 10 is used to inject reinforcing glue 6 (specifically, heat-resistant glue can be used) into the protective cap 3. The outer length of the glue injection port 10 is greater than the inner length, and the two ends of the glue injection port 10 are inclined.

[0019] The protective cap 3 is provided with a glue injection port 10 to achieve horizontal glue sealing, and the armored cable 1 is in a straight state, which is convenient for direct assembly in the later stage.

[0020] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0021] The above is only an embodiment of the present utility model. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An armored thermocouple, characterized in that: The invention comprises an armored cable (1), a compensation conductor (2) and a protective cap (3); the core wire (4) of the armored cable (1) and the lead wire (5) of the compensation conductor (2) are connected, and the protective cap (3) is sleeved on the connection position; a glue injection port (10) is provided on the side of the protective cap (3); the glue injection port (10) is used to inject reinforcing glue (6) into the protective cap (3).

2. The armored thermocouple according to claim 1, characterized in that: The protective cap (3) comprises a first straight cylinder (7), a shrinking cylinder (8) and a second straight cylinder (9) connected in sequence, the diameter of the first straight cylinder (7) being larger than the diameter of the second straight cylinder (9), the first straight cylinder (7) being connected to the large-diameter end of the shrinking cylinder (8), and the second straight cylinder (9) being connected to the small-diameter end of the shrinking cylinder (8); the compensation conductor (2) is on the same side as the first straight cylinder (7), and the armored cable (1) is on the same side as the second straight cylinder (9).

3. The armored thermocouple according to claim 2, characterized in that: The length of the first straight tube (7) is greater than the total length of the second straight tube (9) and the shrinking tube (8).

4. The armored thermocouple according to claim 3, characterized in that: The glue injection port (10) is arranged on the first straight cylinder (7).

5. The armored thermocouple according to claim 1, characterized in that: The outer length of the glue injection port (10) is greater than the inner length, and both ends of the glue injection port (10) are in an inclined state.

6. The armored thermocouple according to claim 1, characterized in that: The protective cap (3) is made of a stainless steel tube.

Images