Thermocouple protection sleeve

Abstract

The utility model discloses a thermocouple protection sleeve which comprises two clamping blocks used for clamping a thermocouple, the outer sides of the two clamping blocks are sleeved with a cover cylinder, the two clamping blocks are provided with placement grooves facing the opposite surfaces, positioning plates used for positioning the thermocouple are arranged in the placement grooves in a sliding mode, and the opposite sides of the two positioning plates are fixedly provided with guide columns. The clamping blocks are provided with through holes used for the guide columns to penetrate through, and the cover cylinder is provided with a plurality of extrusion pieces used for pushing the guide columns to be away from the inner wall of the cover cylinder. In the initial state, the interaction force between the two positioning plates and the thermocouple is low, when the cover cylinder wraps the two clamping blocks, the extrusion piece on the cover cylinder pushes the guide column to move towards the thermocouple, and the guide column is extruded by the matched overstock piece, so that adaptive positioning and clamping of thermocouples with different diameters are realized, and the clamping efficiency is improved. Stable work and safety protection of the thermocouple in a high-temperature environment are ensured, and the applicability and reliability of the whole protective sleeve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a thermocouple protection sleeve. Background Art

[0002] In the field of thermocouples, accurate temperature measurement plays a vital role in numerous industrial and scientific research applications, particularly in materials processing, environmental protection, medical technology, and remote sensing. Based on the working principle of thermocouples, which generates a voltage through the temperature difference between the two ends of a material, thermocouples are widely used for temperature detection in various high and low temperature environments.

[0003] Due to the extremely high temperatures in the operating environment, the thermocouple core and thermoelectrode become soft under high temperature conditions, and their mechanical strength decreases accordingly. Therefore, a protective cover is required for the thermocouple. However, existing thermocouple protective covers have a single design and are difficult to adapt to different thermocouple models, increasing user selection and maintenance costs. Utility Model Content

[0004] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a thermocouple protection sleeve that is suitable for thermocouples of different models.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermocouple protection sleeve, comprising two clamping blocks for clamping the thermocouple, the two clamping blocks being spliced ​​into a cylinder, a cover tube being sleeved on the outer side of the two clamping blocks, and a positioning plate being fixedly installed on one side of the opening of the cover tube; the two clamping blocks are provided with mounting grooves facing opposite each other, a positioning plate for positioning the thermocouple being slidingly provided in the mounting groove, and guide pillars are fixedly installed on the opposite sides of the two positioning plates, a through hole for the guide pillar to pass through is provided on the clamping block, and a plurality of extrusion pieces for pushing the guide pillar away from the inner wall of the cover tube are provided on the cover tube, and when different extrusion pieces contact the guide pillar, the guide pillar moves at different distances.

[0006] According to one embodiment of the present invention, the extrusion part includes a plurality of pressure blocks fixedly mounted on the inner wall of the cover cylinder, the pressure blocks are evenly distributed around the circumference of the cover cylinder, and the side of each pressure block away from the inner wall of the cover cylinder is at a different distance from the axis of the cover cylinder. A guide groove for accommodating the pressure block is provided on the outer side of the clamping block, the through hole is connected to one of the guide grooves, and the guide column extends to the inside of the guide groove. When the pressure block is located in the guide groove, one of the pressure blocks contacts the guide column.

[0007] According to one embodiment of the present invention, a first air vent is provided on the positioning plate, a second air vent connected to the first air vent is provided on the clamping block, and a plurality of third air holes are provided on the cover tube, and there is always one air hole connected to the second air hole.

[0008] According to one embodiment of the present application, when the thermocouple is located in the clamp block, the second air hole is located at the head of the thermocouple.

[0009] According to one embodiment of the present application, the guide column comprises an outer cover fixedly installed on the positioning plate, and a column head is slidably arranged in the outer cover.

[0010] According to one embodiment of the present application, the opposite faces of the two positioning plates are both provided with a limiting groove.

[0011] According to one embodiment of the present application, the inner wall of the limiting groove is arc-shaped.

[0012] Compared with the prior art, the present application has the following beneficial effects: in the initial state, the interaction force between the two positioning plates and the thermocouple is low, when the cover cylinder wraps the two clamp blocks, the extrusion piece on the cover cylinder will push the guide column to move in the direction of the thermocouple, thereby strengthening the interaction force between the positioning plate and the thermocouple, and because the moving distance of the guide column is different when different extrusion pieces contact the guide column, different specifications and sizes of thermocouples can be used, and the appropriate extrusion piece is used to extrude the guide column, thereby realizing adaptive positioning and clamping of different diameter thermocouples, ensuring stable work and safety protection of the thermocouple in a high temperature environment, and improving the applicability and reliability of the entire protective sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0014] Figure 2 It is an expanded view of the overall structure of the present application;

[0015] Figure 3 It is a schematic diagram of the positioning plate of the present application.

[0016] In the figure: 1, clamp block; 2, cover cylinder; 3, positioning disc; 4, installation groove; 5, positioning plate; 51, limiting groove; 6, guide column; 61, outer cover; 62, column head; 63, spring; 7, through hole; 8, extrusion piece; 81, pressing block; 82, guide groove; 9, first air hole; 10, second air hole; 11, third air hole. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] See also Figure 1 and Figure 2 This embodiment provides a thermocouple protection sleeve, comprising two clamping blocks 1 for clamping a thermocouple, the two clamping blocks 1 being spliced ​​into a cylinder, a cover tube 2 being sleeved on the outer side of the two clamping blocks 1, and a positioning plate 3 being fixedly mounted on one side of the opening of the cover tube 2;

[0019] The two clamping blocks 1 are provided with placement grooves 4 facing each other, and a positioning plate 5 for positioning the thermocouple is slidably provided in the placement groove 4. A guide column 6 is fixedly installed on the opposite side of the two positioning plates 5. A through hole 7 for the guide column 6 to pass through is provided on the clamping block 1, and a plurality of extrusion members 8 for pushing the guide column 6 away from the inner wall of the cover tube 2 are provided on the cover tube 2. When different extrusion members 8 come into contact with the guide column 6, the guide column 6 moves at different distances.

[0020] This thermocouple protection sleeve protects the thermocouple by wrapping it around two clamping blocks 1 joined together to form a cylindrical shape, and an outer cover tube 2. Specifically, the two clamping blocks 1, which hold the thermocouple, are inserted into the cover tube 2. The cover tube 2 then limits the two clamping blocks 1 to maintain their cylindrical shape, confining the thermocouple between the two clamping blocks 1. A positioning plate 3 is fixedly mounted on one side of the cover tube 2 to facilitate secure installation of the cover tube 2 on the device to be measured.

[0021] In the initial state, the interaction force between the two positioning plates 5 and the thermocouple is relatively low. When the cover tube 2 wraps the two clamping blocks 1, the extrusion piece 8 on the cover tube 2 will push the guide column 6 to move toward the thermocouple, thereby strengthening the interaction force between the positioning plate 5 and the thermocouple. When different extrusion pieces 8 come into contact with the guide column 6, the guide column 6 moves at different distances. Therefore, thermocouples of different specifications and sizes can be extruded with corresponding extrusion pieces 8 to extrude the guide column 6, thereby achieving adaptive positioning and clamping of thermocouples of different diameters, ensuring stable operation and safety protection of the thermocouple in a high-temperature environment, and improving the applicability and reliability of the entire protective sleeve.

[0022] See also Figure 1 and Figure 2 The specific extrusion part 8 includes a plurality of pressure blocks 81 fixedly mounted on the inner wall of the cover cylinder 2. The pressure blocks 81 are evenly distributed around the circumference of the cover cylinder 2. The side of the pressure block 81 close to the positioning plate 3 is a sloped guide surface. The side of each pressure block 81 away from the inner wall of the cover cylinder 2 is at a different distance from the axis of the cover cylinder 2. A guide groove 82 for accommodating the pressure block 81 is opened on the outside of the clamping block 1. The through hole 7 is connected to one of the guide grooves 82. The guide column 6 extends into the inside of the guide groove 82. When the pressure block 81 is located in the guide groove 82, one of the pressure blocks 81 contacts the guide column 6.

[0023] The specific process of pushing the guide column 6 by the extrusion piece 8 is as follows: in the process of inserting the two clamping blocks 1 into the cover tube 2, the required pressing block 81 is selected according to the thermocouples of different diameters, and then the corresponding pressing block 81 is aligned with the guide groove 82 of the connecting through hole 7, and the remaining pressing blocks 81 slide into the remaining guide grooves 82. In the process of the selected pressing block 81 entering the guide groove 82 of the connecting through hole 7, the guide column 6 first moves gradually toward the direction of the thermocouple along the slope guide surface until it contacts the side of the pressing block 81 away from the inner wall of the cover tube 2, completing the pushing of the guide column 6, thereby realizing effective extrusion and stable clamping of the clamped object.

[0024] When a protective sleeve is added to the outside of the thermocouple, the thickness of the protective sleeve will cause a lag in the temperature measurement of the thermocouple, and the sensitivity and accuracy will be greatly reduced.

[0025] See also Figure 1 and Figure 2 To reduce the impact of the protective sleeve on the thermocouple, a first air hole 9 is provided on the positioning plate 5, a second air hole 10 connected to the first air hole 9 is provided on the clamping block 1, and a plurality of third air holes 11 are provided on the cover tube 2. There is always one air hole connected to the second air hole 10.

[0026] The air temperature of the device to be measured is transferred to the thermocouple through the communication among the first air hole 9, the second air hole 10 and the third air hole 11, thereby reducing the influence of the thickness of the protective sleeve on the temperature measurement sensitivity and accuracy of the thermocouple.

[0027] When the thermocouple is located in the clamping block 1, the second air vent 10 is located at the thermocouple head, thereby allowing the hot air in the device to be tested to be accurately transferred to the thermocouple head, further reducing the impact of the thickness of the protective sleeve on the thermocouple temperature measurement sensitivity and accuracy.

[0028] See also Figure 2 and Figure 3 The guide column 6 includes an outer cover 61 fixedly mounted on the positioning plate 5 , a column head 62 is slidably provided in the outer cover 61 , and a spring 63 is fixedly mounted on the column head 62 and the inner wall of the outer cover 61 .

[0029] In the process of the pressure block 81 squeezing the guide column 6, the column head 62 is squeezed first, and the column head 62 squeezes the spring 63. The elastic potential energy of the spring 63 drives the outer cover 61 and the positioning plate 5 to squeeze the thermocouple, wherein the spring 63 plays a certain buffering role, reducing the rigid squeezing of the positioning plate 5 on the thermocouple, that is, reducing the squeezing deformation of the positioning plate 5 on the thermocouple.

[0030] See also Figure 1 and Figure 2 The two positioning plates 5 have opposing surfaces with limiting grooves 51, and the inner walls of the limiting grooves 51 are arc-shaped. The interaction between the inner walls of the limiting grooves 51 and the thermocouple prevents the thermocouple from moving.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A thermocouple protection sleeve, comprising two clamping blocks (1) for clamping a thermocouple, wherein the two clamping blocks (1) are spliced ​​into a cylinder, a cover tube (2) is provided on the outside of the two clamping blocks (1), and a positioning plate (3) is fixedly installed on one side of the opening of the cover tube (2); The two clamping blocks (1) are provided with placement grooves (4) facing each other, and a positioning plate (5) for positioning the thermocouple is slidably provided in the placement groove (4), and a guide column (6) is fixedly installed on the opposite side of the two positioning plates (5). The clamping blocks (1) are provided with through holes (7) for the guide column (6) to pass through, and the cover tube (2) is provided with a plurality of extrusion members (8) for pushing the guide column (6) away from the inner wall of the cover tube (2). When different extrusion members (8) contact the guide column (6), the guide column (6) moves different distances.

2. The thermocouple protection sleeve according to claim 1, characterized in that: The extrusion member (8) includes a plurality of pressing blocks (81) fixedly mounted on the inner wall of the cover cylinder (2), the pressing blocks (81) are evenly distributed around the circumference of the cover cylinder (2), and the distance from the axis of the cover cylinder (2) to the side of each pressing block (81) away from the inner wall of the cover cylinder (2) is different. A guide groove (82) for accommodating the pressing block (81) is provided on the outer side of the clamping block (1), the through hole (7) is connected to one of the guide grooves (82), and the guide column (6) extends into the inside of the guide groove (82). When the pressing block (81) is located in the guide groove (82), one of the pressing blocks (81) contacts the guide column (6).

3. The thermocouple protection sleeve according to claim 1, characterized in that: The positioning plate (5) is provided with a first air vent (9), the clamping block (1) is provided with a second air vent (10) connected to the first air vent (9), and the cover tube (2) is provided with a plurality of third air vents (11), with one air vent always being connected to the second air vent (10).

4. The thermocouple protection sleeve according to claim 3, characterized in that: When the thermocouple is located in the clamping block (1), the second air vent (10) is located at the head of the thermocouple.

5. The thermocouple protection sleeve according to claim 1, characterized in that: The guide column (6) comprises an outer cover (61) fixedly mounted on the positioning plate (5), a column head (62) is slidably arranged in the outer cover (61), and a spring (63) is fixedly mounted on the column head (62) and the inner wall of the outer cover (61).

6. The thermocouple protection sleeve according to claim 1, characterized in that: The opposing surfaces of the two positioning plates (5) are both provided with limiting grooves (51).

7. The thermocouple protection sleeve according to claim 6, characterized in that: The inner wall of the limiting groove (51) is arc-shaped.

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