Armored K-type thermocouple

Abstract

The utility model relates to the technical field of thermocouples, and discloses an armored K-type thermocouple, which comprises a protective shell, and a K-type thermocouple core is arranged in a cavity of the protective shell; a junction box; the installation assembly comprises a first base plate, a second base plate and a positioning protrusion, the first base plate is arranged at the bottom of the junction box, the second base plate is arranged at the bottom of the first base plate, the junction box is locked with the protection shell through a fastener and tightly presses the first base plate and the second base plate, and the positioning protrusion is fixedly arranged at the bottom of the first base plate. The positioning protrusion is clamped with the second base plate and adjusts the orientation of the junction box mounting pipe, the first base plate and the second base plate can be formed by ceramic firing, the junction box and the protective shell are separated through the first base plate and the second base plate, heat conducted to the junction box by the protective shell can be reduced, and the influence of high temperature of a detection environment on electronic components in the junction box is reduced. Damage of high temperature to wiring assemblies in the junction box is inhibited, and firmness and stability of wiring are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to an armored K-type thermocouple. Background Art

[0002] K-type thermocouple is a sensor for measuring temperature in industrial fields. It is usually used in conjunction with display instruments, recording instruments, PLCs, and DCSs.

[0003] The prior art discloses a high-temperature resistant K-shaped thermocouple (publication number: CN217819076U) that is easy to use, comprising a junction box, an end cover is installed on the top of the junction box, a lead wire wiring sleeve is fixedly installed on one side of the junction box, an anti-lost chain is fixedly connected to the top of the end cover, one end of the anti-lost chain is fixedly connected to the surface of the lead wire wiring sleeve, a first protective shell is provided at the bottom of the junction box, a second protective shell is fixedly connected to the bottom of the first protective shell, a temperature sensing element is provided inside the first protective shell and the second protective shell, and a heat-resistant mechanism is provided on the surface of the temperature sensing element.

[0004] In the prior art, the thermocouple core is arranged in the cavity of the protective shell and needs to be connected with a cable for use. Therefore, a junction box is also provided on the top of the shell, and the wiring harness passes through the junction box and is connected to the supporting equipment. During the detection process, the shell will be in a relatively high temperature working environment, and the heat will be conducted to the junction box, thereby affecting the stability of the connection between the wiring harnesses, and also affecting the insulation effect and service life of the wiring harness. It is necessary to insulate between the junction box and the protective shell.

[0005] To this end, we propose an armored K-type thermocouple. Utility Model Content

[0006] The utility model mainly solves the technical problem that the above-mentioned junction box is easily heated by the protective shell, and provides an armored K-type thermocouple.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme, an armored K-type thermocouple, comprising:

[0008] The protective shell has a tubular structure with a cavity, and a K-type thermocouple core is arranged in the protective shell cavity;

[0009] A junction box is a housing structure for wiring arranged on the top of the protective shell, a mounting tube for wiring is fixedly provided on the side wall of the junction box, and a sealing cover is threadedly connected to the top of the protective shell;

[0010] An installation component is arranged between the protective shell and the junction box for heat insulation and adjusting the installation position of the junction box. The installation component includes a first pad, a second pad and a positioning protrusion. The first pad is arranged at the bottom of the junction box, and the second pad is arranged at the bottom of the first pad. The junction box is locked with the protective shell by fasteners and the first pad and the second pad are pressed together. The positioning protrusion is fixedly arranged at the bottom of the first pad, and the positioning protrusion is clamped with the second pad and adjusts the direction of the junction box installation tube.

[0011] As a preferred embodiment of the present invention, the first pad and the second pad are both annular structures, the positioning protrusion is integrally formed with the first pad, and at least two positioning protrusions are symmetrically arranged at the bottom of the first pad.

[0012] As a preferred embodiment of the present invention, the installation assembly further comprises limiting grooves, a plurality of limiting grooves are provided on the top of the second pad, and the positioning protrusions and the limiting grooves are engaged with each other to lock the position of the junction box.

[0013] As a preferred embodiment of the utility model, the positioning protrusion forms a rectangular block structure, the limiting groove forms a rectangular notch adapted for the positioning protrusion, and a plurality of identical limiting grooves are arranged in a circular array on the top of the second pad.

[0014] As a preferred embodiment of the present invention, the installation assembly also includes a first installation channel and a second installation channel, the wall surfaces of the junction box and the first pad are penetrated by the same first installation channel, the end of the second pad is penetrated by the second installation channel, and the second installation channel and the first installation channel can be aligned with each other.

[0015] As a preferred embodiment of the utility model, the protective shell includes an outer metal shell and an inner insulation material, the insulation material is coated on the inner wall of the metal shell, the K-type thermocouple core is fixedly arranged in the metal shell cavity, a threaded hole is opened on the top of the metal shell, and the fasteners include but are not limited to bolts, and the bolts pass through the first mounting channel and the second mounting channel to be connected to the threaded holes of the metal shell.

[0016] As a preferred embodiment of the utility model, a flange is fixedly provided on the outside of the metal shell, an anti-lost chain is provided on the outside of the junction box, and the other end of the anti-lost chain is connected to the sealing cover.

[0017] Beneficial Effects

[0018] The utility model provides an armored K-type thermocouple, which has the following beneficial effects:

[0019] 1. In this armored K-type thermocouple, the first pad and the second pad can be made of ceramic firing. The first pad and the second pad are used to separate the junction box from the protective shell, which can reduce the heat conduction from the protective shell to the junction box, reduce the impact of the high temperature of the detection environment on the internal electronic components of the junction box, inhibit the damage of the high temperature to the internal wiring components of the junction box, and ensure the firmness and stability of the wiring.

[0020] 2. This armored K-type thermocouple, by dropping the positioning protrusion into the limiting grooves at different positions, when the junction box and the protective shell are locked, the limiting grooves can limit the positioning protrusion, so that the direction of the wiring tube of the junction box can be fixed, and then the direction of the cable can be flexibly adjusted to avoid the phenomenon of large bending of the cable due to the fixed position of the wiring tube of the junction box. The installation is convenient and flexible, and it is more conducive to the overall layout.

[0021] 3. This armored K-type thermocouple achieves installation and fixation of the junction box by passing the bolts through the first installation channel and the second installation channel and fastening the bolts to the metal shell of the protective shell, thereby ensuring the firm connection between the junction box and the protective shell and the compression and fixation effect of the first pad and the second pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the overall three-dimensional diagrams of the utility model;

[0023] Figure 2 This is the second overall stereogram of the utility model;

[0024] Figure 3 A three-dimensional diagram of installing the first pad and the second pad of the junction box of the utility model;

[0025] Figure 4 This is the first pad and wiring and assembly diagram of the utility model;

[0026] Figure 5 This is a three-dimensional diagram of the second pad of the utility model.

[0027] Legend: 10, protective shell; 11, junction box; 12, first pad; 13, second pad; 20, first installation channel; 21, positioning protrusion; 22, limiting groove; 23, second installation channel. DETAILED DESCRIPTION

[0028] An armored K-type thermocouple, such as Figure 1 and Figure 2 As shown, including:

[0029] The protective shell 10 has a hollow tubular structure, and a K-type thermocouple core is arranged in the cavity of the protective shell 10;

[0030] The junction box 11 is a shell structure for wiring arranged on the top of the protective shell 10. A mounting tube for wiring is fixedly provided on the side wall of the junction box 11. A sealing cover is threadedly connected to the top of the protective shell 10. Specifically, the K-type thermocouple core needs to be electrically connected to the wire, and the wire passes through the junction box 11 and extends to the outside to connect to the detection device to realize temperature detection. The K-type thermocouple core is a well-known prior art, and the specific model and specification are not limited too much here;

[0031] like Figure 3 , Figure 4 and Figure 5 As shown, the mounting assembly is arranged between the protective shell 10 and the junction box 11 for heat insulation and adjusting the installation position of the junction box 11. The mounting assembly includes a first pad 12, a second pad 13 and a positioning protrusion 21. The first pad 12 is arranged at the bottom of the junction box 11, and the second pad 13 is arranged at the bottom of the first pad 12. The junction box 11 is locked with the protective shell 10 by fasteners and the first pad 12 and the second pad 13 are pressed tightly. The positioning protrusion 21 is fixedly arranged at the bottom of the first pad 12. The positioning protrusion 21 is clamped with the second pad 13 and adjusts the direction of the mounting tube of the junction box 11. The first pad 12 is arranged at the bottom of the junction box 11, and the second pad 13 is arranged at the bottom of the first pad 12. The pad 12 and the second pad 13 are both of circular ring structure, the positioning protrusion 21 is integrally formed with the first pad 12, and at least two positioning protrusions 21 are symmetrically arranged on the bottom of the first pad 12. In this solution, the first pad 12 and the second pad 13 can be made of fired ceramics. The first pad 12 and the second pad 13 separate the junction box 11 from the protective shell 10, which can reduce the heat conduction from the protective shell 10 to the junction box 11, reduce the impact of the high temperature of the detection environment on the internal electronic components of the junction box 11, inhibit the damage of the high temperature to the internal wiring components of the junction box 11, and ensure the firmness and stability of the wiring.

[0032] like Figure 4 and Figure 5 As shown, the installation component also includes a limiting groove 22, and a plurality of limiting grooves 22 are provided on the top of the second pad 13. The positioning protrusion 21 and the limiting groove 22 are clamped and locked to the position of the junction box 11. The positioning protrusion 21 forms a rectangular block structure, and the limiting groove 22 forms a rectangular notch adapted for the positioning protrusion 21. A plurality of identical limiting grooves 22 are arranged in a circular array on the top of the second pad 13. By dropping the positioning protrusion 21 into the limiting grooves 22 at different positions, when the junction box 11 and the protective shell 10 are locked, the limiting groove 22 can limit the positioning protrusion 21, so that the direction of the wiring tube of the junction box 11 can be fixed, and then the direction of the cable can be flexibly adjusted to avoid the phenomenon that the cable is greatly bent due to the fixed position of the wiring tube of the junction box 11. The installation is convenient and flexible, and is more conducive to the overall layout.

[0033] like Figure 4As shown, the installation component also includes a first installation channel 20 and a second installation channel 23. The walls of the junction box 11 and the first pad 12 are penetrated with the same first installation channel 20, and the end of the second pad 13 is penetrated with the second installation channel 23. The second installation channel 23 and the first installation channel 20 can be aligned with each other. By passing the bolts through the first installation channel 20 and the second installation channel 23, the bolts are fastened to the metal shell of the protective shell 10 to achieve the installation and fixation of the junction box 11, ensure the firm connection between the junction box 11 and the protective shell 10 and the compression and fixing effect of the first pad 12 and the second pad 13.

[0034] Not shown in the figure, the protective shell 10 includes an outer metal shell and an inner insulation material, the insulation material is coated on the inner wall of the metal shell, the K-type thermocouple core is fixedly arranged in the metal shell cavity, the top of the metal shell is provided with a threaded hole, the fastener includes a bolt but is not limited to a bolt, the bolt passes through the first installation channel 20 and the second installation channel 23 and is connected to the threaded hole of the metal shell, such as Figure 1 As shown, a flange is fixed on the outside of the metal shell, and an anti-lost chain is provided on the outside of the junction box 11, and the other end of the anti-lost chain is connected to the sealing cover, wherein the metal shell is made of stainless steel, and can be made of 3039 stainless steel, and the thermal insulation material can be gun mud. The metal shell can be centrifuged in the specific production process so that the gun mud is evenly attached to the inner wall of the metal shell under the action of centrifugal force. The outside of the K-type thermocouple core is also covered with a shielding sleeve, that is, a mesh structure woven with metal wires to protect the K-type thermocouple core from interference from electromagnetic signals when detecting temperature, thereby ensuring the accuracy of detection. The flange can be used to install the metal shell, which is convenient for connection to the equipment. The anti-lost chain can ensure that the sealing cover and the junction box 11 will not fall off and be lost after removal, which is convenient for maintenance and installation of cables.

[0035] The working principle of the utility model is as follows: the protective shell 10 is locked and fixed to the equipment through the flange, that is, it is locked with bolts and nuts, the sealing cover is opened, the cable passes through the chamber of the junction box 11 and is electrically connected to the K-type thermocouple core, the bolt passes through the first installation channel 20, the orientation of the installation pipe port is adjusted, and then the first pad 12 falls and fits with the second pad 13, the protrusion 21 falls into the limiting groove 22, the bolt is tightened, and the bolt is tightened to the metal shell of the protective shell 10 to achieve the installation and fixation of the junction box 11, ensure the firm connection between the junction box 11 and the protective shell 10 and the compression of the first pad 12 and the second pad 13, and then the wiring and 11 are locked with the protective shell 10, and the angle of the cable led out from the installation pipe port can be adjusted.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An armored K-type thermocouple, characterized in that: include: The protective shell (10) has a tubular structure with a cavity, and a K-type thermocouple core is arranged in the cavity of the protective shell (10); A junction box (11) is a housing structure for wiring arranged on the top of the protective shell (10); a mounting tube for wiring is fixedly provided on the side wall of the junction box (11); and a sealing cover is threadedly connected to the top of the protective shell (10); A mounting assembly is arranged between a protective shell (10) and a junction box (11) for heat insulation and adjusting the mounting position of the junction box (11), the mounting assembly comprising a first pad (12), a second pad (13) and a positioning protrusion (21), the first pad (12) being arranged at the bottom of the junction box (11), the second pad (13) being arranged at the bottom of the first pad (12), the junction box (11) being locked with the protective shell (10) by a fastener and pressing the first pad (12) and the second pad (13), the positioning protrusion (21) being fixedly arranged at the bottom of the first pad (12), the positioning protrusion (21) being clamped with the second pad (13) and adjusting the orientation of the mounting tube of the junction box (11).

2. The armored K-type thermocouple according to claim 1, characterized in that: The first pad (12) and the second pad (13) are both annular structures, the positioning protrusion (21) and the first pad (12) are integrally formed, and at least two positioning protrusions (21) are symmetrically arranged on the bottom of the first pad (12).

3. The armored K-type thermocouple according to claim 1, characterized in that: The installation assembly further comprises limiting grooves (22), a plurality of limiting grooves (22) are provided on the top of the second pad (13), and the positioning protrusions (21) and the limiting grooves (22) are engaged with each other to lock the position of the junction box (11).

4. The armored K-type thermocouple according to claim 3, characterized in that: The positioning protrusion (21) forms a rectangular block structure, the limiting groove (22) forms a rectangular notch adapted to the positioning protrusion (21), and a plurality of identical limiting grooves (22) are arranged in a circular array on the top of the second pad (13).

5. The armored K-type thermocouple according to claim 1, characterized in that: The installation assembly further comprises a first installation channel (20) and a second installation channel (23); the wall surfaces of the junction box (11) and the first pad (12) are penetrated with the same first installation channel (20); the end of the second pad (13) is penetrated with the second installation channel (23); and the second installation channel (23) and the first installation channel (20) can be aligned with each other.

6. The armored K-type thermocouple according to claim 5, characterized in that: The protective shell (10) comprises an outer metal shell and an inner heat-insulating material, the heat-insulating material is coated on the inner wall of the metal shell, the K-type thermocouple core is fixedly arranged in the metal shell cavity, a threaded hole is opened on the top of the metal shell, and the fasteners include bolts but are not limited to bolts, and the bolts pass through the first installation channel (20) and the second installation channel (23) to be connected to the threaded holes of the metal shell.

7. The armored K-type thermocouple according to claim 6, characterized in that: A flange is fixedly provided on the outside of the metal shell, and an anti-lost chain is provided on the outside of the junction box (11), and the other end of the anti-lost chain is connected to the sealing cover.

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