A erosion-resistant, long-life, liftable, multi-point collection thermocouple

Abstract

The present invention provides an anti-erosion, high-life, liftable, multi-point collection type thermocouple, comprising a junction box, an insulating tube, a sliding column and a fastening sleeve; the sliding column is slidably sleeved on the insulating tube and can only slide along the axis of the insulating tube; a plurality of elastic pressure plates are circumferentially arranged on the sliding column, the elastic pressure plates are distributed around the insulating tube and a gap is left between the insulating tube; a mounting plate is arranged on the fastening sleeve; an outer circumferential surface of the sliding column is provided with an outer thread; an inner circumferential surface of the fastening sleeve is provided with an inner thread, and a pressure ring is also arranged on the inner circumferential surface; the fastening sleeve is threadedly sleeved on the sliding column, wherein the elastic pressure plate is located inside the pressure ring; when the fastening sleeve is rotated so that the elastic pressure plate slides with the sliding column and is in a state close to the pressure ring, the pressure ring will squeeze the elastic pressure plate at the same time, so that the elastic pressure plate undergoes elastic deformation and is tightly pressed against the insulating tube; the device can realize stepless adjustment of the measuring end of the thermocouple and can better meet the measurement requirements.

Description

Technical Field

[0001] The invention relates to the field of thermocouples, and in particular to an anti-erosion, long-life, liftable, multi-point collection type 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, thermocouples are usually fixed on the equipment to be tested by bolts. Since the thermocouple itself cannot adjust the position of the measuring end, the height of the collection point can only be adjusted by increasing or decreasing the number of gaskets at the installation point during installation and use. The adjustment process is inconvenient, and stepless adjustment cannot be achieved, resulting in the inability to accurately adjust the measurement position, affecting the measurement accuracy. In addition, when measuring the fluid temperature, the insulating tube is easily eroded by the impact of the fluid, affecting the service life, so there is room for further improvement. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an anti-erosion, long-life, liftable, multi-point acquisition thermocouple, which mainly solves the problem that the measuring end of the thermocouple in the prior art cannot be infinitely adjusted, which easily affects the measurement accuracy.

[0005] An anti-erosion, high-life, liftable, multi-point collection type thermocouple, comprising 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 sliding column and a fastening sleeve;

[0006] The sliding column is slidably sleeved on the insulating tube and can only slide along the axis of the insulating tube; a plurality of elastic pressing plates are arranged circumferentially on the sliding column, and the elastic pressing plates are distributed around the insulating tube and leave gaps between the insulating tube;

[0007] A mounting plate is provided on the fastening sleeve; an external thread is provided on the outer circumference of the sliding column; an internal thread is provided on the inner circumference of the fastening sleeve, and a pressure ring is also provided on the inner circumference; the fastening sleeve is threadedly sleeved on the sliding column, wherein the elastic pressure plate is located inside the pressure ring; when the fastening sleeve is rotated so that the elastic pressure plate slides with the sliding column and is close to the pressure ring, the pressure ring will squeeze the elastic pressure plate at the same time, causing the elastic pressure plate to undergo elastic deformation and tightly press against the insulating tube.

[0008] Preferably, a guide rail parallel to the axis of the insulating tube is provided on the outer circumferential surface of the insulating tube, and a guide rail groove is opened on the sliding column, and the sliding column is slidably connected to the guide rail through the guide rail groove.

[0009] Preferably, the plurality of elastic pressure plates are all arranged on the sliding column in an inclined manner toward the insulating tube.

[0010] Preferably, the surface of the elastic pressure plate away from the insulating tube is an arc-shaped surface, and the arc-shaped surfaces of all the elastic pressure plates are located on the same conical surface, and the axis of the conical surface is collinear with the axis of the insulating tube.

[0011] Preferably, the circumferential surface of the pressure ring close to the elastic pressure plate is a conical surface, and the axis of the conical surface is colinear with the axis of the insulating tube.

[0012] Preferably, a friction pad is provided on the surface of the elastic pressing plate close to the insulating tube.

[0013] Preferably, an anti-slip ring is provided on the inner circumferential surface of the fastening sleeve, and the sliding column is located between the anti-slip ring and the pressure ring.

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

[0015] 1. Provided is an anti-erosion, high-life, liftable, multi-point collection type thermocouple, wherein a sliding column and a fastening sleeve are provided in the device, wherein the sliding column slides along the insulating tube, and the fastening sleeve is threadedly sleeved on the sliding column, wherein an elastic pressure plate is provided on the sliding column, and a pressure ring is provided on the fastening sleeve; when the measuring end position of the thermocouple needs to be adjusted, the sliding column is first slid to the corresponding position, since the sliding column is threadedly connected to the fastening sleeve and the sliding column cannot rotate but can only move, when the fastening sleeve is tightened, the elastic pressure plate will gradually approach the pressure ring as the sliding column slides, and will eventually be squeezed by the pressure ring to undergo elastic deformation, thereby tightly resting against the insulating tube, and locking the fastening sleeve and the sliding column on the thermocouple; the adjustment process is simple and convenient, and can achieve stepless adjustment, which can better meet the measurement needs of the thermocouple;

[0016] 2. The surface of the elastic pressure plate away from the insulating tube is an arc-shaped surface, and the arc-shaped surfaces of all the elastic pressure plates are located on the same conical surface, and the axis of the conical surface is collinear with the axis of the insulating tube; the circumferential surface of the pressure ring close to the elastic pressure plate is a conical surface, and the axis of the conical surface is collinear with the axis of the insulating tube; after such an arrangement, it is more convenient to put the pressure ring on the elastic pressure plate, and the surfaces where the pressure ring and the elastic pressure plate contact each other are all arc-shaped surfaces, which can increase the contact area and reduce stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an external view of the anti-erosion, high-life, liftable, multi-point collection type thermocouple proposed by the present invention;

[0018] Figure 2 It is a cross-sectional view of the anti-erosion, long-life, liftable, multi-point collection type thermocouple proposed by the present invention;

[0019] Figure 3 It is a structural view of the sliding column in the present invention;

[0020] Figure 4 is a cross-sectional view of the fastening sleeve in the present invention;

[0021] The reference numerals are as follows:

[0022] 1. Junction box; 2. Insulating tube; 3. Fastening sleeve; 4. Mounting plate; 5. Guide rail; 6. Pressing ring; 7. Elastic pressing plate; 8. Sliding column; 9. Anti-slip ring; 10. Friction pad. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] like Figure 1-4 The illustrated embodiment is a erosion-resistant, long-life, liftable, multi-point collection type thermocouple, comprising a junction box 1 and an insulating tube, wherein the insulating tube is arranged below the junction box, a thermode is arranged in the insulating tube 7, and further comprising a sliding column 8 and a fastening sleeve 3;

[0026] The sliding column 8 is slidably sleeved on the insulating tube 7 and can only slide along the axis of the insulating tube 7; a plurality of elastic pressing plates 7 are circumferentially arranged on the sliding column 8, and the elastic pressing plates 7 are distributed around the insulating tube 7 and a gap is left between the insulating tube 7;

[0027] A mounting plate 4 is provided on the tightening sleeve 3; an external thread is provided on the outer circumference of the sliding column 8; an internal thread is provided on the inner circumference of the tightening sleeve 3, and a pressing ring 6 is also provided on the inner circumference; the tightening sleeve 3 is threadedly sleeved on the sliding column 8, wherein the elastic pressure plate 7 is located inside the pressing ring 6; when the tightening sleeve 3 is rotated so that the elastic pressure plate 7 slides with the sliding column 8 and is close to the pressing ring 6, the pressing ring 6 will squeeze the elastic pressure plate 7 at the same time, so that the elastic pressure plate 7 undergoes elastic deformation and tightly presses against the insulating tube 2.

[0028] In the prior art, since the thermocouple itself cannot adjust the position of the measuring end, the height of the collection point can only be adjusted by increasing or decreasing the number of gaskets at the installation point during installation and use. The adjustment process is inconvenient, and the stepless adjustment cannot be achieved, resulting in the inability to accurately adjust the measurement position, thereby affecting the measurement accuracy. In view of this problem, this embodiment designs an anti-erosion, high-life, liftable, multi-point collection thermocouple; the device is provided with a slide column 8 and a fastening sleeve 3, the slide column 8 slides along the insulating tube 7, the fastening sleeve 3 is threadedly sleeved on the slide column 8, wherein the slide column 8 is provided with an elastic pressure plate 7, and the fastening sleeve 3 is provided with a pressing ring 6; when the position of the measuring end of the thermocouple needs to be adjusted, first slide the slide post 8 to the corresponding position. Since the slide post 8 is threadedly connected to the fastening sleeve 3 and the slide post 8 cannot rotate but can only move, when the fastening sleeve 3 is tightened, the elastic pressure plate 7 will slide with the slide post 8 and gradually approach the pressing ring 6, and finally be squeezed by the pressing ring 6 to undergo elastic deformation so as to tightly rest against the insulating tube 2, locking the fastening sleeve 3 and the slide post 8 on the thermocouple; the fastening sleeve 3 is provided with a mounting plate 4, and the mounting plate 4 is provided with a through hole, and the entire device can be fixedly installed at the position to be measured of the equipment by bolts, etc.

[0029] Further specific settings such as Figure 2 and Figure 3 As shown, a guide rail 5 parallel to the axis of the insulating tube 2 is provided on the outer circumferential surface of the insulating tube 2, and a guide rail groove is opened on the sliding column 8, and is slidably connected to the guide rail 5 through the guide rail groove; in addition to being used to guide the sliding of the sliding column 8, when measuring the temperature of the fluid, the guide rail 5 protruding outward can also withstand the impact of a part of the fluid, thereby reducing the erosion of the insulating tube 2 and increasing the service life of the thermocouple.

[0030] In this embodiment, there are four elastic pressure plates 7, which are arranged in a circular array on the upper end surface of the sliding column 8 to make the force more uniform; the elastic pressure plates 7 are all inclined toward the insulating tube 2 to facilitate the deformation of the elastic pressure plates 7.

[0031] In this embodiment, the surface of the elastic pressure plate 7 away from the insulating tube 2 is an arcuate surface, and the arcuate surfaces of all the elastic pressure plates 7 are located on the same conical surface, and the axis of the conical surface is collinear with the axis of the insulating tube 2; the circumferential surface of the pressure ring 6 close to the elastic pressure plate 7 is a conical surface, and the axis of the conical surface is collinear with the axis of the insulating tube 2; after such an arrangement, it is more convenient for the pressure ring 6 to be mounted on the four elastic pressure plates 7, and the surfaces on which the pressure ring 6 and the elastic pressure plates 7 contact each other are all arcuate surfaces, which can increase the contact area and reduce stress concentration.

[0032] In this embodiment, a friction pad 10 is provided on the surface of the elastic pressing plate 7 close to the insulating tube 2. The friction pad 10 may be a rubber pad, which can increase the friction between the elastic pressing plate 7 and the insulating tube 2 and improve the fixing effect.

[0033] like Figure 4 As shown, in this embodiment, an anti-slip ring 9 is provided on the inner circumference of the fastening sleeve 3, and the sliding column 8 is located between the anti-slip ring 9 and the pressure ring 6; the anti-slip ring 9 can prevent the fastening sleeve 3 from being separated from the sliding column 8 when the fastening sleeve 3 is loosened.

[0034] When the device is used, first loosen the fastening sleeve 3, then slide the thermocouple to adjust the position of the measuring end of the thermocouple, and then tighten the fastening sleeve 3 after moving to a suitable position. The adjustment process is simple and convenient, and can achieve stepless adjustment, which can better meet the measurement needs of the thermocouple.

[0035] 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. An anti-erosion, long-life, liftable, multi-point collection type thermocouple, comprising a junction box (1) and an insulating tube, wherein the insulating tube is arranged below the junction box, and a thermode is arranged in the insulating tube (2), characterized in that: It also includes a sliding column (8) and a fastening sleeve (3); The sliding column (8) is slidably sleeved on the insulating tube (2) and can only slide along the axis of the insulating tube (2); a plurality of elastic pressure plates (7) are circumferentially arranged on the sliding column (8), and the elastic pressure plates (7) are distributed around the insulating tube (2) and have gaps between them and the insulating tube (2); A mounting plate (4) is provided on the tightening sleeve (3); an outer circumferential surface of the sliding column (8) is provided with an external thread; an inner circumferential surface of the tightening sleeve (3) is provided with an internal thread, and a pressure ring (6) is also provided on the inner circumferential surface; the tightening sleeve (3) is threadedly sleeved on the sliding column (8), wherein the elastic pressure plate (7) is located inside the pressure ring (6); when the tightening sleeve (3) is rotated so that the elastic pressure plate (7) slides along with the sliding column (8) and is in a state close to the pressure ring (6), the pressure ring (6) will simultaneously squeeze the elastic pressure plate (7), so that the elastic pressure plate (7) undergoes elastic deformation and is tightly pressed against the insulating tube (2); A guide rail (5) parallel to the axis of the insulating tube (2) is provided on the outer peripheral surface of the insulating tube (2), and a guide rail groove is formed on the sliding column (8), and the sliding column (8) is slidably connected to the guide rail (5) through the guide rail groove; An anti-slip ring (9) is provided on the inner circumferential surface of the fastening sleeve (3), and the sliding column (8) is located between the anti-slip ring (9) and the pressure ring (6).

2. The anti-erosion, long-life, liftable, multi-point acquisition thermocouple according to claim 1, characterized in that: A plurality of elastic pressure plates (7) are arranged on the sliding column (8) in an inclined manner toward the insulating tube (2).

3. The anti-erosion, long-life, liftable, multi-point acquisition thermocouple according to claim 2, characterized in that: The surface of the elastic pressing plate (7) away from the insulating tube (2) is an arc-shaped surface, and the arc-shaped surfaces of all the elastic pressing plates (7) are located on the same conical surface, and the axis of the conical surface is colinear with the axis of the insulating tube (2).

4. The anti-erosion, long-life, liftable, multi-point acquisition thermocouple according to claim 3 is characterized by: The circumferential surface of the pressure ring (6) close to the elastic pressure plate (7) is a conical surface, and the axis of the conical surface is colinear with the axis of the insulating tube (2).

5. The anti-erosion, long-life, liftable, multi-point collection type thermocouple according to claim 1, characterized in that: A friction pad (10) is provided on the surface of the elastic pressing plate (7) close to the insulating tube (2).

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