A low-energy-consumption, rotatable, and long-life thermocouple

Abstract

The invention provides a low-energy-consumption rotatable long-life thermocouple. The device is provided with a sleeve and a bolt on the basis of the structure of an existing thermocouple. A first through hole is opened on the nut of the bolt, a second through hole is opened on the stud, an insulating tube passes through the first through hole and the second through hole, and a gap is left between the bolt and the insulating tube to prevent the screw from interfering with the movement of the insulating tube; the sleeve is installed in the first through hole with damping rotation, and the sleeve is threadedly connected to the insulating tube; when the device is used, the bolt is first fixedly connected to the device to be tested, and after the installation is completed, the thermocouple is held with one hand and the sleeve is twisted with the other hand. Since the two are threadedly connected, the height position of the insulating tube can be adjusted; after the adjustment is completed, if it is necessary to adjust the measuring angle of the hot electrode in the insulating tube of the thermocouple, it is only necessary to loosen the thermocouple and directly rotate the sleeve. Due to the friction at the threaded connection, the thermocouple will rotate with the sleeve.

Description

Technical Field

[0001] The invention relates to the field of thermocouples, and in particular to a low-energy-consumption, rotatable, and long-life thermocouple. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They directly measure temperature and convert temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments. The appearance of various thermocouples is often very different due to needs, but their basic structure is roughly the same. They are usually composed of main parts such as hot electrodes, insulating sleeve protection tubes and junction boxes, and need to be used in conjunction with display instruments, recording instruments and electronic regulators.

[0003] In the prior art, the thermocouple itself is not able to adjust the position of the measuring end. During long-term monitoring, such as measuring the temperature of some fluid media, it is easy for the insulating tube to be eroded excessively on one side due to the unidirectional impact of the fluid medium, thus affecting its service life. In addition, when it is necessary to measure the temperature of collection points at different heights, it is often necessary to remove the thermocouple and reinstall it, which is very inconvenient. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a low-energy-consuming, rotatable, and long-life thermocouple, which mainly solves the problem in the prior art that it is inconvenient to adjust the measuring angle and the measuring position of the thermocouple.

[0005] A low-energy-consuming, rotatable, and long-life thermocouple comprises a junction box and an insulating tube, wherein the insulating tube is arranged below the junction box, and a thermode is arranged inside the insulating tube, and is characterized in that: it also comprises a sleeve and a bolt;

[0006] The bolt comprises a nut and a stud located below the nut, the nut is provided with a vertical first through hole, the stud is provided with a vertical second through hole, and the axes of the first through hole and the second through hole are collinear; the insulating tube passes through the first through hole and the second through hole, and a gap is left between the bolt and the insulating tube;

[0007] The sleeve is installed in the first through hole with damping rotation and can rotate around the axis of the first through hole; the inner circumference of the sleeve is provided with internal threads, the outer circumference of the insulating tube is provided with external threads, and the sleeve is threadedly connected with the insulating tube.

[0008] Preferably, a positioning ring is provided on the outer peripheral surface of the sleeve, an annular sliding groove is opened on the inner surface of the first through hole on the nut, and the positioning ring is slidably arranged in the sliding groove.

[0009] Preferably, a cylindrical heat-insulating cavity is provided in the wall of the sleeve, and the axis of the heat-insulating cavity is colinear with the axis of the sleeve.

[0010] Preferably, a sealing ring is provided in the second through hole of the stud, and a through hole for the insulating tube to pass through is provided on the sealing ring.

[0011] Preferably, a telescopic sleeve is provided between the sleeve and the junction box, the telescopic sleeve is sleeved outside the insulating tube and can be telescoped along the axial direction of the insulating tube; the first end of the telescopic sleeve is rotatably connected to the junction box, and the second end is rotatably connected to the sleeve.

[0012] Preferably, a gap is left between the tube wall of the telescopic sleeve and the insulating tube.

[0013] Preferably, a plurality of rotating plates are circumferentially provided on the outer peripheral area of ​​the sleeve where the nut is exposed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. A low-energy rotatable long-life thermocouple is provided. The device is provided with a sleeve and a bolt on the basis of the structure of the existing thermocouple. When the device is used, the bolt is first fixedly connected to the mounting boss of the device to be tested by a wrench or other tools. After the installation is completed, the thermocouple is held with one hand and the sleeve is twisted with the other hand. Since the two are threadedly connected, the height position of the insulating tube can be adjusted. After the adjustment is completed, if the measuring angle of the thermoelectrode in the thermocouple insulating tube needs to be adjusted, it is only necessary to loosen the thermocouple and directly rotate the sleeve. Due to the friction at the threaded connection, the thermocouple will rotate with the sleeve. In addition, since the sleeve is connected to the bolt by damping rotation, after the angle is adjusted, due to the friction at the damping, the thermocouple will not rotate due to the impact of the fluid, and the measurement accuracy of the thermocouple will not be affected.

[0016] 2. A telescopic sleeve is provided between the sleeve and the junction box. The telescopic sleeve has two functions: one is to protect the insulating tube to prevent the insulating tube from being deformed by external force during installation; the other is to provide heat insulation to prevent the external temperature from interfering with the thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an external view of the low-energy-consumption rotatable and long-life thermocouple proposed by the present invention;

[0018] Figure 2 It is an internal view of the low-energy-consumption rotatable and long-life thermocouple proposed by the present invention;

[0019] The reference numerals are as follows:

[0020] 1. Junction box; 2. Telescopic sleeve; 3. Sleeve; 4. Nut; 5. Stud; 6. Insulation tube; 7. Insulation cavity; 8. Positioning ring; 9. Sealing ring; 10. Turn plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more. The orientation or state relationship indicated by the terms "inside", "upper", "lower", etc. is based on the orientation or state relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein.

[0023] like Figure 1-2 The low-energy-consuming, rotatable, and long-life thermocouple shown in the figure comprises a junction box 1 and an insulating tube 6, wherein the insulating tube 6 is arranged below the junction box 1, a thermode is arranged in the insulating tube 7, and further comprises a sleeve 3 and a bolt;

[0024] The bolt includes a nut 4 and a stud 5 located below the nut 4, the nut 4 is provided with a first vertical through hole, the stud 5 is provided with a second vertical through hole, and the axes of the first through hole and the second through hole are collinear; the insulating tube 7 passes through the first through hole and the second through hole, and a gap is left between the bolt and the insulating tube 6;

[0025] The sleeve 3 is installed in the first through hole with damping rotation and can rotate around the axis of the first through hole; the inner circumference of the sleeve 3 is provided with an internal thread, the outer circumference of the insulating tube 6 is provided with an external thread, and the sleeve 3 is threadedly connected with the insulating tube 6.

[0026] In the prior art, the thermocouple itself cannot adjust the position of the measuring end. In the long-term monitoring process, for example, when measuring the temperature of some fluid media, it is easy for the insulating tube 6 to be eroded on one side due to the unidirectional impact of the fluid medium, which affects the service life. In addition, when it is necessary to measure the temperature of the collection points at different heights, the thermocouple often needs to be removed and reinstalled and adjusted, which is very inconvenient. In view of these problems, this embodiment provides a low-energy rotatable and long-life thermocouple. The device is provided with a sleeve 3 and a bolt on the basis of the structure of the existing thermocouple, wherein a first through hole is opened on the nut 4 of the bolt, and a second through hole is opened on the stud 5. The insulating tube 6 passes through the first through hole and the second through hole, and a gap is left between the bolt and the insulating tube 6 to prevent the screw from interfering with the movement of the insulating tube 6. The sleeve 3 is installed in the first through hole for damping rotation, and the sleeve 3 is threadedly connected to the insulating tube 6. When using the device, the bolt is first fixedly connected to the mounting boss of the device to be tested by a wrench or other tool. After the installation is completed, the thermocouple is supported by one hand and the sleeve 3 is turned with the other hand. Since the two are threadedly connected, the height position of the insulating tube 6 can be adjusted. After the adjustment is completed, if the measuring angle of the thermoelectrode in the thermocouple insulating tube 6 needs to be adjusted, it is only necessary to loosen the thermocouple and directly rotate the sleeve 3. Due to the friction at the threaded connection, the thermocouple will rotate with the sleeve 3. In addition, since the sleeve 3 is connected to the bolt with damping rotation, after the angle is adjusted, due to the friction at the damping, the thermocouple will not rotate due to the impact of the fluid, and the measurement accuracy of the thermocouple will not be affected.

[0027] Further specific settings such as Figure 2 As shown, a positioning ring 8 is provided on the outer circumferential surface of the sleeve 3, and an annular slide groove is opened on the inner surface of the first through hole on the nut 4, and the positioning ring 8 is slidably set in the slide groove; in this embodiment, the positioning ring 8 is a rubber ring, and there is a transition fit between it and the slide groove, so it will not affect the rotation of the sleeve 3. At the same time, after the rubber is elastically deformed, it can fully contact with the groove surface of the slide groove, thereby providing sufficient damping friction.

[0028] In this embodiment, a cylindrical insulation cavity 7 is provided in the wall of the sleeve 3, and the axis of the insulation cavity 7 is colinear with the axis of the sleeve 3; the insulation cavity 7 can prevent the external temperature from interfering with the thermocouple and avoiding affecting the measurement result.

[0029] In this embodiment, a sealing ring 9 is provided in the second through hole of the stud 5, and a through hole is provided on the sealing ring 9 for the insulating tube 6 to pass through; the sealing ring 9 is provided to prevent the fluid medium from contacting the positioning ring 8 when the thermocouple measures the temperature of the fluid medium, thereby preventing the positioning ring 8 from being corroded.

[0030] In this embodiment, a telescopic sleeve 2 is provided between the sleeve 3 and the junction box 1. The telescopic sleeve 2 is sleeved outside the insulating tube 6 and can be telescoped along the axial direction of the insulating tube 6; the first end of the telescopic sleeve 2 is rotatably connected to the junction box 1, and the second end is rotatably connected to the sleeve 3; in addition, a gap is left between the tube wall of the telescopic sleeve 2 and the insulating tube 6; the telescopic sleeve 2 has two functions. One is to protect the insulating tube 6 to prevent the insulating tube 6 from being deformed by external force during installation; the other is to provide heat insulation, which also prevents the external temperature from interfering with the thermocouple.

[0031] In this embodiment, a plurality of rotating plates 10 are provided around the outer peripheral surface of the sleeve 3 where the nut 4 is exposed, so that the sleeve 3 can be rotated without carrying tools, which is convenient for operation.

[0032] The device has a simple structure and can realize the rotation of the thermocouple to prevent the insulating tube 6 from being subjected to unidirectional impact of the fluid medium; it can also realize the stepless adjustment of the insulating tube 6 to facilitate the measurement of the temperature of the collection points at different heights; the whole process is simple and convenient, and can better meet the measurement needs of the thermocouple.

[0033] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-energy consumption, rotatable, and long-life thermocouple, comprising a junction box (1) and an insulating tube (6), wherein the insulating tube (6) is arranged below the junction box (1), and a thermode is arranged inside the insulating tube (6), characterized in that: Also includes a sleeve (3) and a bolt; The bolt comprises a nut (4) and a stud (5) located below the nut (4); the nut (4) is provided with a first vertical through hole, the stud (5) is provided with a second vertical through hole, and the axes of the first through hole and the second through hole are collinear; the insulating tube (6) passes through the first through hole and the second through hole, and a gap is left between the bolt and the insulating tube (6); The sleeve (3) is installed in the first through hole in a damped rotation manner and can rotate around the axis of the first through hole; an internal thread is provided on the inner circumference of the sleeve (3), and an external thread is provided on the outer circumference of the insulating tube (6); the sleeve (3) and the insulating tube (6) are threadedly connected; When the device is used, the bolt is first fixedly connected to the mounting boss of the device to be tested by a tool such as a wrench. After the installation is completed, the thermocouple is held with one hand and the sleeve (3) is turned with the other hand. Since the two are threadedly connected, the height position of the insulating tube (6) can be adjusted. After the adjustment is completed, if it is necessary to adjust the measuring angle of the thermoelectrode in the thermocouple insulating tube (6), it is only necessary to loosen the thermocouple and directly turn the sleeve (3). Due to the friction force at the threaded connection, the thermocouple will rotate with the sleeve (3). Since the sleeve (3) is connected to the bolt in a rotationally damped manner, after the angle is adjusted, the thermocouple will not rotate due to the impact of the fluid due to the friction at the damping point.

2. The low-energy-consumption, rotatable, and long-life thermocouple according to claim 1, characterized in that: A positioning ring (8) is provided on the outer peripheral surface of the sleeve (3), and an annular sliding groove is provided on the inner surface of the first through hole on the nut (4), and the positioning ring (8) is slidably arranged in the sliding groove.

3. The low-energy-consumption, rotatable, and long-life thermocouple according to claim 1, characterized in that: A cylindrical heat-insulating cavity (7) is provided in the wall of the sleeve (3), and the axis of the heat-insulating cavity (7) is colinear with the axis of the sleeve (3).

4. The low-energy-consumption rotatable long-life thermocouple according to claim 1, characterized in that: A sealing ring (9) is provided in the second through hole of the stud (5), and a through hole for the insulating tube (6) to pass through is provided on the sealing ring (9).

5. The low-energy-consumption, rotatable, and long-life thermocouple according to claim 1, characterized in that: A telescopic sleeve (2) is provided between the sleeve (3) and the junction box (1); the telescopic sleeve (2) is sleeved outside the insulating tube (6) and can be telescoped along the axial direction of the insulating tube (6); a first end of the telescopic sleeve (2) is rotatably connected to the junction box (1), and a second end is rotatably connected to the sleeve (3).

6. The low-energy-consumption rotatable long-life thermocouple according to claim 5, characterized in that: A gap is left between the tube wall of the telescopic sleeve (2) and the insulating tube (6).

7. The low-energy-consumption, rotatable, and long-life thermocouple according to claim 1, characterized in that: A plurality of rotating plates (10) are provided in the circumferential direction of the outer peripheral surface area of ​​the sleeve (3) where the nut (4) is exposed.

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