Thermocouple fixing structure
By designing the thermocouple fixing structure and using the beveled surface and high-pressure gas backblowing technology, the problems of thermocouple protection sleeve wear and maintenance are solved, and the long life and efficient maintenance of the thermocouple are achieved.
Patent Information
- Application Number
- CN202422921671.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Thermocouple protection sleeves are prone to wear in high-temperature dusty environments, have a short service life, and are difficult to maintain.
A thermocouple fixing structure is designed, including a mounting plate and a circular tube. The protective sleeve passes through the mounting plate and extends into the circular tube. A bevel is provided at the far end of the circular tube to block high-temperature particles on the leeward side. The air pipe and solenoid valve are combined to use high-pressure gas backflushing to clean solid particles.
Effectively reduce thermocouple wear, extend service life, ensure detection accuracy, and simplify maintenance process.
Smart Images
Figure CN223435665U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to thermocouple fixing technical field, especially a kind of thermocouple fixing structure. BACKGROUND
[0002] Thermocouple is the loop that is composed of two different conductors or semiconductors A and B. When the one end of the two conductors is connected to each other and is at different temperatures, an electromotive force will be generated in the loop, and the direction and size of the electromotive force are related to the material of the conductor and the temperature of the two junctions. This phenomenon is called "thermoelectric effect", and the loop composed of two conductors is called "thermocouple".
[0003] When measuring the temperature with a thermocouple, one end of the thermocouple (called the working end or hot end) is usually placed in the medium to be measured, and the other end (called the free end or cold end) is connected to the measurement circuit. When the temperature of the medium to be measured changes, the temperature of the working end of the thermocouple will also change accordingly, generating a thermoelectric electromotive force. By measuring the size of the thermoelectric electromotive force, the temperature of the medium to be measured can be known. When in use, a through hole is provided on the shell of the equipment to be measured, and the working end of the protective sleeve of the thermocouple is inserted into the equipment through the through hole for measurement.
[0004] When measuring high-temperature gas containing dust particles, the working end of the thermocouple is impacted by high-temperature particles on the windward surface of the high-temperature gas containing dust particles, and the protective sleeve of the thermocouple often appears wear on the windward surface, even ground through, which seriously affects the service life of the thermocouple; when the equipment is stopped, the protective sleeve is seriously accumulated with dust and material residues, solid particles and material residues are sintered around the protective sleeve, the diameter of the protective sleeve becomes thick, and the protective sleeve is difficult to be pulled out of the equipment during maintenance, which greatly increases the difficulty of maintenance. UTILITY MODEL CONTENTS
[0005] In view of the problem that the end of the protective sleeve of the thermocouple is easy to be worn under the impact of high-temperature particles and has a short service life, the utility model provides a thermocouple fixing structure.
[0006] To solve the above problems, the utility model adopts the technical scheme that,
[0007] The utility model provides a thermocouple fixed structure, including thermocouple, the thermocouple fixed structure further includes mounting frame, and the mounting frame includes mounting plate, and the side surface fixedly arranged with round pipe of mounting plate, and the thermocouple is arranged on the mounting plate, and the protective sleeve of thermocouple extends to the round pipe after penetrating the mounting plate, and the end of protective sleeve is arranged on the outside of bevel, and the setting length of protective sleeve in the round pipe is shorter than the length of round pipe, and the end of protective sleeve is arranged on the outside of bevel, in use, the mounting plate is fixed on the lateral wall of equipment, and the round pipe is inserted into the equipment, and the bevel is arranged on the leeward of high-temperature gas flow containing dust particles, and high-temperature particles are blocked by the round pipe, and the abrasion of thermocouple is reduced, and the service life is improved, and the end of protective sleeve is arranged on the outside of bevel, and the normal work of thermocouple is guaranteed, and the accuracy of detection is guaranteed.
[0008] Preferably, the center line of the thermocouple is arranged in parallel with the axis of the round pipe, and the center line of the thermocouple is arranged perpendicularly to the mounting plate.
[0009] Preferably, the angle between the bevel and the mounting plate is 30 DEG <= alpha < 90 DEG. Under the premise of ensuring the accuracy of the work of the thermocouple, more high-temperature particles are blocked.
[0010] Preferably, alpha = 45 DEG. The work of the thermocouple is more accurate, the blocking effect of high-temperature particles is better, and the service life is longer.
[0011] Preferably, a through hole is arranged on the mounting plate, and the through hole is communicated with the round pipe, a gas pipe is connected to the through hole, and an electromagnetic valve is arranged on the gas pipe. The gas pipe can be connected to high-pressure gas, the round pipe is back-flushed by the high-pressure gas, solid particles accumulated around the protective sleeve are removed, the solid particles are prevented from sintering around the protective sleeve, and the protective sleeve can be pulled out of the round pipe for maintenance. The electromagnetic valve is arranged to facilitate the periodic opening and closing of the electromagnetic valve to back-flush the round pipe with high-pressure gas.
[0012] Preferably, a fixing pipe is fixedly arranged on the side of the mounting plate away from the round pipe, a flange is fixedly arranged on the end of the fixing pipe away from the mounting plate, and the thermocouple is fixed to the flange.
[0013] The above technical scheme can be seen, the advantages of the utility model are as follows:
[0014] 1, in use, the mounting plate is fixed on the lateral wall of equipment, the round pipe is inserted into the equipment, the bevel is arranged on the leeward, high-temperature particles are blocked by the round pipe, the abrasion of thermocouple is reduced, the service life is improved, the end of protective sleeve is arranged on the outside of bevel, the normal work of thermocouple is guaranteed, and the accuracy of detection is guaranteed.
[0015] 2. Through the setting of the air pipe, the air pipe can be connected to high-pressure gas, and the high-pressure gas is used to backflush the inside of the circular tube to avoid the accumulation of solid particles around the protective sleeve, thereby effectively preventing solid particles from sintering around the protective sleeve, which is conducive to the extraction of the protective sleeve from the circular tube during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 It is a structural diagram of the present utility model.
[0018] Description of main reference numerals
[0019] 1-thermocouple, 2-mounting plate, 3-circular tube, 4-air pipe, 5-solenoid valve, 6-fixing tube, 7-flange; 101-protective sleeve; 301-beveled surface; α in the figure is the angle between the beveled surface and the mounting plate; the direction of the arrow in the figure indicates the flow direction of the high-temperature gas containing dust particles. DETAILED DESCRIPTION
[0020] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.
[0021] like Figure 1 As shown, a thermocouple fixing structure includes a thermocouple 1 and a mounting frame. The mounting frame includes a mounting plate 2; a circular tube 3 is fixedly mounted on a side of the mounting plate 2; a fixing tube 6 is fixedly mounted on the side of the mounting plate 2 away from the circular tube 3; a flange 7 is fixedly mounted on the end of the fixing tube 6 away from the mounting plate 2; and the thermocouple 1 is fixed to the flange 7. A protective sleeve 101 of the thermocouple 1 extends through the mounting plate 2 and into the circular tube 3. The centerline of the thermocouple 1 is arranged parallel to the axis of the circular tube 3 and perpendicular to the mounting plate 2.
[0022] In the above arrangement, the circular tube 3 is provided with a bevel 301 at the end away from the mounting plate 2; the protective sleeve 101 is arranged in the circular tube 3 with a length shorter than that of the circular tube 3, and the end of the protective sleeve 101 is arranged outside the bevel 301. The angle a between the bevel 301 and the mounting plate 2 is 45°, the thermocouple 1 works more accurately, and the blocking effect of high-temperature particles is good, and the service life is long. In other alternative embodiments, a = 30°, the end of the protective sleeve of the thermocouple 1 leaks out of the bevel 301 less, the contact area is less, the accuracy of the thermocouple 1 is affected, but the blocking effect of high-temperature particles is better, and the service life is longer.
[0023] In order to clean the solid particles accumulated around the protective sleeve 101, the protective sleeve 101 is extracted from the circular tube 3, a through hole is arranged on the mounting plate 2, and the through hole is communicated with the circular tube 3; a gas pipe 4 is connected to the through hole; and an electromagnetic valve 5 is arranged on the gas pipe 4. The gas pipe 4 can be connected to high-pressure gas, and the high-pressure gas is used to blow back in the circular tube 3, so as to avoid the accumulation of solid particles around the protective sleeve 101, thereby effectively preventing the solid particles from sintering around the protective sleeve 101, and facilitating the extraction of the protective sleeve 101 from the circular tube 3 during maintenance. The arrangement of the electromagnetic valve 5 facilitates the periodic opening and closing of the electromagnetic valve 5 to blow back high-pressure gas in the circular tube 3.
[0024] In use, the mounting plate 2 is fixed on the side wall of the equipment, the circular tube 3 extends into the equipment, the bevel 301 is arranged on the leeward side of the high-temperature gas flow containing dust particles, and the high-temperature particles are blocked by the circular tube 3, thereby reducing the wear of the thermocouple 1 and prolonging the service life.
[0025] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A thermocouple fixing structure, comprising a thermocouple (1), characterized in that: The thermocouple fixing structure further comprises a mounting frame; the mounting frame comprises a mounting plate (2); a round tube (3) is fixedly arranged on the side of the mounting plate (2); the thermocouple (1) is arranged on the mounting plate (2), and the protective sleeve (101) of the thermocouple (1) passes through the mounting plate (2) and extends into the round tube (3); an oblique surface (301) is arranged at one end of the round tube (3) away from the mounting plate (2); the length of the protective sleeve (101) arranged in the round tube (3) is shorter than the length of the round tube (3), and the end of the protective sleeve (101) is arranged outside the oblique surface (301).
2. The thermocouple fixing structure according to claim 1, characterized in that: The center line of the thermocouple (1) is arranged parallel to the axis of the circular tube (3); the center line of the thermocouple (1) is arranged perpendicular to the mounting plate (2).
3. The thermocouple fixing structure according to claim 2, characterized in that: The angle between the chamfered surface (301) and the mounting plate (2) is 30°≤α<90°.
4. The thermocouple fixing structure according to claim 3, characterized in that: α=45°。 5. The thermocouple fixing structure according to claim 4, characterized in that: A through hole is provided on the mounting plate (2), and the through hole is connected to the circular tube (3); an air pipe (4) is connected to the through hole; and an electromagnetic valve (5) is provided on the air pipe (4).
6. The thermocouple fixing structure according to claim 1 or 5, characterized in that: A fixing tube (6) is fixedly provided on the side of the mounting plate (2) away from the circular tube (3); a flange (7) is fixedly provided on the end of the fixing tube (6) away from the mounting plate (2); and the thermocouple (1) is fixed on the flange (7).