High-temperature strain sensor with protection function

Abstract

The utility model discloses a high-temperature strain sensor with a protection function, which belongs to the technical field of sensors and comprises a rod body, a probe is fixedly mounted on the side wall of the rod body, a probe head is fixedly mounted at one end of the probe, and a protection assembly and an air outlet assembly are arranged on the side wall of the rod body. According to the utility model, through the arrangement of the protection assembly, after the use of the high-temperature strain sensor is finished, the protection sleeve moves upwards on the probe and stops moving after moving to the probe, so that the probe is protected, the structure is simple, the probe is conveniently protected after the use of the high-temperature strain sensor, and the use safety of the high-temperature strain sensor is improved. On one hand, the abrasion of the high-temperature strain sensor to the detection head during placement or transportation can be reduced, on the other hand, the detection head of the high-temperature strain sensor can be prevented from being damaged by external force, and the self-protection of the high-temperature strain sensor is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to a high-temperature strain sensor with a protective function. Background Art

[0002] Strain sensors measure the strain generated by an object's deformation due to force. The most commonly used sensing element is a resistance strain gauge, which converts changes in strain on a mechanical component into electrical changes. Common types include wire-type resistance strain gauges and foil-type resistance strain gauges.

[0003] A Chinese patent discloses a high-temperature resistant flexible long-gauge strain sensor (CN209783534U), which uses fiber optic Bragg grating sensing as the sensing technology and utilizes a high-temperature resistant packaging process to achieve strain monitoring under high-temperature conditions. The sensor of the utility model includes a fiber optic Bragg grating and a packaging sheath, wherein the fiber optic Bragg grating is fixed in the packaging sheath through anchoring areas at both ends, and the grating area is located between the two anchoring areas. When the sensor is arranged on the surface of a high-temperature facility, the strain monitored by the grating area can reflect the strain of a certain range of the structure. The sensing structure of the utility model is simple, low-cost, and can be connected in series in large quantities. It can solve the problem of high-temperature strain / stress monitoring of high-temperature facilities (flat or curved surfaces), has strong market competitiveness, and has a beneficial effect on ensuring the safety of national infrastructure. At present, most high-temperature strain sensor probes are exposed to the outside, so it is easy to cause wear to the probe during transportation or storage, thereby reducing the service life of the high-temperature strain sensor. For this purpose, a high-temperature strain sensor with a protective function is provided. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that high-temperature strain sensors lack a protection function and to propose a high-temperature strain sensor with a protection function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature strain sensor with a protective function, comprising a rod body, a detection needle fixedly mounted on the side wall of the rod body, a detection head fixedly mounted on one end of the detection needle, and a protective component and an air outlet component provided on the side wall of the rod body;

[0006] The protective assembly includes a fixed tube, one end of which is fixedly connected to the side wall of the rod body, a movable tube is slidably installed on the inner wall of the fixed tube, one end of the movable tube is fixedly installed with a mounting plate, and a protective sleeve is fixedly installed on the side wall of the mounting plate.

[0007] As a further description of the above technical solution:

[0008] A positioning spring is fixedly mounted on the upper surface of the fixing tube, a paddle is fixedly mounted on one end of the positioning spring, and a positioning pin is fixedly mounted on the lower surface of the paddle.

[0009] As a further description of the above technical solution:

[0010] One end of the positioning pin passes through the interior of the positioning spring and extends to the interior of the fixed tube. A positioning hole is provided on the upper surface of the movable tube, and the positioning pin is adapted to the positioning hole in size.

[0011] As a further description of the above technical solution:

[0012] The detection head is located inside the protective sleeve, and a protective pad is fixedly installed on the inner surface of the detection head.

[0013] As a further description of the above technical solution:

[0014] The air outlet assembly includes a fixed rod, one end of the fixed rod is fixedly connected to the side wall of the protective sleeve, the other end of the fixed rod is fixedly installed with a piston ring, and a piston sleeve is fixedly installed on the side wall of the rod body. One end of the fixed rod extends to the interior of the piston sleeve, and the outer surface of the piston ring is slidably connected to the inner surface of the piston sleeve.

[0015] As a further description of the above technical solution:

[0016] The outer surface of the piston sleeve is connected to a connecting pipe, one end of the connecting pipe is connected to the outer surface of the fixed pipe, the side wall of the movable pipe is connected to the outer surface of the protective sleeve through the fixed pipe, a cavity is provided inside the protective sleeve, and an air outlet is provided on the inner surface of the protective sleeve.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. In the utility model, a protective component is provided, and the positioning pin is driven by the paddle to move toward the outer surface of the fixed tube. At this time, after the movable tube loses the limit of the positioning pin, the movable tube drives the protective sleeve to move toward the rod body through the mounting plate. After the protective sleeve moves to the appropriate position, another set of positioning springs will drive the positioning pin to be inserted into the positioning hole on the movable tube through the paddle, thereby fixing the protective sleeve by fixing the movable tube. After the high-temperature strain sensor is used, the protective sleeve will move on the detection needle and stop moving after moving to the detection head, thereby protecting the detection head. The structure is simple and convenient for protecting the detection head after the high-temperature strain sensor is used. On the one hand, it can reduce the wear of the detection head caused by the high-temperature strain sensor during placement or transportation. On the other hand, it can prevent the detection head of the high-temperature strain sensor from being damaged by external force, further improving the self-protection of the high-temperature strain sensor.

[0019] 2. In the utility model, by providing an air outlet assembly, the protective sleeve will drive the fixed rod to move synchronously when it moves. At this time, the fixed rod will drive the piston ring to move in the piston sleeve, thereby transporting the gas in the piston sleeve to the fixed tube through the connecting tube, and then transporting it from the fixed tube to the cavity of the protective sleeve through the movable tube. When the protective sleeve moves, it is blown toward the outer surface of the detection head through the air outlet hole, so that the detection head is automatically cleaned during the removal of the protective sleeve, thereby improving the accuracy of data detection of the high-temperature strain sensor during use and ensuring the stability of the high-temperature strain sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-temperature strain sensor with protective function.

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the rod in a high-temperature strain sensor with protective function.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the air outlet component in a high-temperature strain sensor with protective function.

[0023] Figure 4 A high-temperature strain sensor with protective function Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Legend:

[0025] 1. Rod body; 2. Detection needle; 3. Protective assembly; 31. Fixed tube; 32. Movable tube; 33. Mounting plate; 34. Protective cover; 35. Positioning spring; 36. Pick; 37. Positioning pin; 4. Exhaust assembly; 41. Fixed rod; 42. Piston ring; 43. Piston sleeve; 44. Connecting tube; 45. Exhaust hole; 5. Detection head. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying 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.

[0027] See also Figure 1-Figure 4The utility model provides a technical solution: a high-temperature strain sensor with a protective function, comprising a rod body 1, a detection needle 2 is fixedly mounted on the side wall of the rod body 1, a detection head 5 is fixedly mounted on one end of the detection needle 2, and a protective component 3 and an air outlet component 4 are provided on the side wall of the rod body 1;

[0028] The protective assembly 3 includes a fixed tube 31, one end of the fixed tube 31 is fixedly connected to the side wall of the rod body 1, a movable tube 32 is slidably installed on the inner wall of the fixed tube 31, one end of the movable tube 32 is fixedly installed with a mounting plate 33, and a protective sleeve 34 is fixedly installed on the side wall of the mounting plate 33, a positioning spring 35 is fixedly installed on the upper surface of the fixed tube 31, one end of the positioning spring 35 is fixedly installed with a paddle 36, and a positioning pin 37 is fixedly installed on the lower surface of the paddle 36, one end of the positioning pin 37 passes through the interior of the positioning spring 35 and extends to the interior of the fixed tube 31, a positioning hole is provided on the upper surface of the movable tube 32, and the positioning pin 37 is adapted to the size of the positioning hole, the detection head 5 is located inside the protective sleeve 34, and a protective pad is fixedly installed on the inner surface of the detection head 5.

[0029] The specific implementation method is as follows: the positioning pin 37 is driven by the paddle 36 to move toward the outer surface of the fixed tube 31. At this time, the movable tube 32 loses the limit of the positioning pin 37, and then the movable tube 32 drives the protective sleeve 34 to move toward the rod body 1 through the mounting plate 33. After the protective sleeve 34 moves to the appropriate position, another set of positioning springs 35 will drive the positioning pin 37 through the paddle 36 to insert into the positioning hole on the movable tube 32, thereby fixing the protective sleeve 34 by fixing the movable tube 32. After the high-temperature strain sensor is used, the protective sleeve 34 will move onto the detection needle 2, and stop moving after moving to the detection head 5, thereby protecting the detection head 5.

[0030] The air outlet assembly 4 includes a fixed rod 41, one end of the fixed rod 41 is fixedly connected to the side wall of the protective sleeve 34, and the other end of the fixed rod 41 is fixedly installed with a piston ring 42. A piston sleeve 43 is fixedly installed on the side wall of the rod body 1, and one end of the fixed rod 41 extends to the interior of the piston sleeve 43. The outer surface of the piston ring 42 is slidably connected to the inner surface of the piston sleeve 43. A connecting pipe 44 is installed on the outer surface of the piston sleeve 43, and one end of the connecting pipe 44 is connected to the outer surface of the fixed pipe 31. The side wall of the movable pipe 32 is connected to the outer surface of the protective sleeve 34 through the fixed pipe. A cavity is provided inside the protective sleeve 34, and an air outlet hole 45 is provided on the inner surface of the protective sleeve 34.

[0031] The specific implementation method is as follows: when the protective sleeve 34 moves, it will drive the fixed rod 41 to move synchronously. At this time, the fixed rod 41 will drive the piston ring 42 to move in the piston sleeve 43, thereby transporting the gas in the piston sleeve 43 to the fixed tube 31 through the connecting tube 44, and then transporting it from the fixed tube to the cavity of the protective sleeve 34 through the movable tube 32. When the protective sleeve 34 moves, it will be blown to the outer surface of the detection head 5 through the air outlet 45.

[0032] Working principle: The positioning pin 37 is driven to move toward the outer surface of the fixed tube 31 by the paddle 36. At this time, the movable tube 32 loses the limit of the positioning pin 37, and then the movable tube 32 drives the protective sleeve 34 to move toward the direction of the rod body 1 through the mounting plate 33. After the protective sleeve 34 moves to the appropriate position, another set of positioning springs 35 will drive the positioning pin 37 through the paddle 36 to insert into the positioning hole on the movable tube 32, thereby fixing the protective sleeve 34 by fixing the movable tube 32. When the protective sleeve 34 moves, it will drive the fixed rod 41 moves synchronously, at this time the fixed rod 41 will drive the piston ring 42 to move in the piston sleeve 43, so that the gas in the piston sleeve 43 is transported to the fixed tube 31 through the connecting tube 44, and then transported from the fixed tube to the cavity of the protective sleeve 34 through the movable tube 32. When the protective sleeve 34 moves, it is blown to the outer surface of the detection head 5 through the air outlet 45. After the high-temperature strain sensor is used up, the protective sleeve 34 will move on the detection needle 2, and stop moving after moving to the detection head 5, thereby protecting the detection head 5.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-temperature strain sensor with a protective function, comprising a rod (1), characterized in that: A detection needle (2) is fixedly mounted on the side wall of the rod body (1), a detection head (5) is fixedly mounted on one end of the detection needle (2), and a protection component (3) and an air outlet component (4) are provided on the side wall of the rod body (1); The protective assembly (3) comprises a fixed tube (31), one end of the fixed tube (31) is fixedly connected to the side wall of the rod body (1), a movable tube (32) is slidably mounted on the inner wall of the fixed tube (31), a mounting plate (33) is fixedly mounted on one end of the movable tube (32), and a protective sleeve (34) is fixedly mounted on the side wall of the mounting plate (33).

2. The high-temperature strain sensor with a protective function according to claim 1, characterized in that: A positioning spring (35) is fixedly mounted on the upper surface of the fixed tube (31), a paddle (36) is fixedly mounted on one end of the positioning spring (35), and a positioning pin (37) is fixedly mounted on the lower surface of the paddle (36).

3. The high-temperature strain sensor with a protective function according to claim 2, characterized in that: One end of the positioning pin (37) passes through the interior of the positioning spring (35) and extends to the interior of the fixed tube (31). A positioning hole is provided on the upper surface of the movable tube (32), and the positioning pin (37) is adapted to the size of the positioning hole.

4. The high-temperature strain sensor with a protective function according to claim 3, characterized in that: The detection head (5) is located inside the protective sleeve (34), and a protective pad is fixedly mounted on the inner surface of the detection head (5).

5. The high-temperature strain sensor with a protective function according to claim 4, characterized in that: The gas outlet assembly (4) includes a fixed rod (41), one end of the fixed rod (41) is fixedly connected to the side wall of the protective sleeve (34), the other end of the fixed rod (41) is fixedly mounted with a piston ring (42), the side wall of the rod body (1) is fixedly mounted with a piston sleeve (43), one end of the fixed rod (41) extends to the interior of the piston sleeve (43), and the outer surface of the piston ring (42) is slidably connected to the inner surface of the piston sleeve (43).

6. The high-temperature strain sensor with a protective function according to claim 5, characterized in that: The outer surface of the piston sleeve (43) is connected to a connecting pipe (44), one end of which is connected to the outer surface of the fixed pipe (31). The side wall of the movable pipe (32) is connected to the outer surface of the protective sleeve (34) through the fixed pipe. A cavity is provided inside the protective sleeve (34), and an air outlet (45) is provided on the inner surface of the protective sleeve (34).

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