Elastic mounting bracket based on bimetallic strip and thermocouple using the bracket

Abstract

The present invention discloses an elastic mounting bracket based on a bimetallic strip and a thermocouple using the bracket. A first bimetallic strip, a first guide tube, and a second guide tube and a second bimetallic strip are fixedly arranged on both sides of a central connecting strip. The first bimetallic strip and the second bimetallic strip are located on one side of the plane where the central connecting strip is located, and the first guide tube and the second guide tube are located on the other side of the plane where the central connecting strip is located. Along the length of the installation pipe, the thermocouple passes through the first guide tube and / or the second guide tube on both sides and reaches the outer surface of the first bimetallic strip and / or the second bimetallic strip. The present invention uses a fixture based on a bimetallic strip as a mounting and fixing structure for the thermocouple temperature measuring point. When installed at room temperature, the thermocouple temperature measuring point is located at the center of the radial cross-section of the tubular structure. When the temperature rises to a specific ambient temperature, the bimetallic strip acts to move the thermocouple temperature measuring point to a position close to the inner wall of the tubular structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermocouples, and more particularly, relates to a thermocouple capable of detecting temperature against a wall at a specific ambient temperature. Background Art

[0002] Thermocouples are commonly used temperature detection and control units in various chemical, nuclear power and other projects. They need to be able to actually reflect the temperature and provide timely feedback. More importantly, due to the different actual usage environments, various adaptability improvements need to be made to thermocouples, such as the corrosion resistance requirements of acids and alkalis, the wear resistance requirements of dust impact, and the location requirements of various special temperature measurement structures.

[0003] In actual use, there is a very long tubular structure, which requires multiple thermocouple temperature measurement points to be set up along the length, and the thermocouple temperature measurement points need to be close to the inner wall of the metal tubular structure for temperature measurement. The length of the tubular structure has brought great instability to the installation of multiple thermocouple temperature measurement points close to the inner wall, and there are often welds left on the inner wall of this tubular structure, which can easily damage the thermocouple temperature measurement points. Similarly, when there is a long-distance thermocouple sleeve, the same installation problem exists. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology. For a very long tubular structure, a thermocouple is provided that can detect the temperature of the tubular structure at a specific ambient temperature. A clamp based on a bimetallic strip is used as an installation and fixing structure for the thermocouple temperature measuring point. When installed at room temperature, the thermocouple temperature measuring point is located at the center of the radial cross-section of the tubular structure. When the temperature rises to the specific ambient temperature, the bimetallic strip brings the thermocouple temperature measuring point to a position close to the inner wall of the tubular structure.

[0005] The technical objectives of the present invention are achieved through the following technical solutions:

[0006] An elastic mounting bracket based on a bimetallic strip includes a first bimetallic strip, a second bimetallic strip, a central connecting strip, a first guide tube, and a second guide tube, wherein: the first bimetallic strip, the first guide tube, and the second guide tube and the second bimetallic strip are fixedly arranged on both sides of the central connecting strip, respectively; the first bimetallic strip and the second bimetallic strip are located on one side of the plane where the central connecting strip is located, and the first guide tube and the second guide tube are located on the other side of the plane where the central connecting strip is located.

[0007] Moreover, the two sides of the central connecting plate are fixedly connected to the first guide tube and the second guide tube respectively to form a gap, and the first bimetallic strip and the second bimetallic strip fixedly connected to the central connecting plate are arranged in the gap, so that the two thermocouples can pass through the outlet of the first guide tube and the outlet of the second guide tube respectively to reach the outer surface of the first bimetallic strip and the second bimetallic strip.

[0008] Furthermore, threading holes are provided on the central connecting piece, preferably symmetrically provided on the central connecting piece.

[0009] Moreover, a first fixing buckle is provided on the outer surface of the first bimetallic strip, and a second fixing buckle is provided on the outer surface of the second bimetallic strip.

[0010] Moreover, the end of the first bimetallic strip is configured to be arc-shaped and bent toward the second bimetallic strip, and the end of the second bimetallic strip is also arc-shaped and bent toward the first bimetallic strip.

[0011] Furthermore, a connecting member is provided on the central connecting piece.

[0012] Moreover, the connecting component is an integral connecting component, and the integral connecting component is a solid structure or a hollow structure.

[0013] Furthermore, the connecting components are provided on the central connecting piece in segments, and a secondary connecting component made of a relatively flexible material is used to connect the connecting components of each elastic mounting bracket to form a single connecting component. Alternatively, the single connecting component is made of a flexible material. The connecting components and the secondary connecting component are fixedly connected by means such as threads or welding, and the single connecting component formed by the connecting components and the secondary connecting component may be a solid or hollow structure.

[0014] Utilizing the thermocouple of the elastic mounting bracket based on the bimetallic strip, along the length of the installation pipe, for each elastic mounting bracket based on the bimetallic strip, the thermocouple temperature measuring structure passes through the first guide tube and / or the second guide tube on both sides respectively, reaching the outer surface of the first bimetallic strip and / or the second bimetallic strip, and is preferably fixed by the first fixing buckle and / or the second fixing buckle; the remaining thermocouples pass through the wire threading hole or the gap between the elastic mounting bracket and the inner wall of the pipe, reaching the next elastic mounting bracket based on the bimetallic strip for installation, until the last elastic mounting bracket based on the bimetallic strip.

[0015] Moreover, the thermocouple temperature measurement structure is a thermocouple temperature measurement armored wire.

[0016] Moreover, each thermocouple temperature measuring structure is connected to the junction box.

[0017] This patent also discloses the use of bimetallic strips in the installation of thermocouples, utilizing the bending effect of the bimetallic strips in the test environment temperature to bring the thermocouple temperature measurement point to a position close to the inner wall of the tubular structure.

[0018] Compared with the prior art, the present invention provides a mounting bracket and thermocouple that can expand according to the test environment temperature for a very long tubular structure, and utilizes this bimetallic clamp as the mounting and fixing structure of the thermocouple temperature measuring point. When installed at room temperature, the thermocouple temperature measuring point is located at the center of the radial cross section of the tubular structure. When the temperature rises to a specific ambient temperature, the bimetallic strip brings the thermocouple temperature measuring point to a position close to the inner wall of the tubular structure, thus avoiding the following situation: when initially installed, the thermocouple temperature measuring point is tilted and close to the inner wall of the tubular structure. The inner wall of the tubular structure is gradually pushed into the thermocouple in this way. Due to the presence of welds left by welding on the inner wall of the tubular structure, it is very easy to cause damage to the thermocouple temperature measuring point, such as causing varying degrees of wear or damage. When disassembling, since the test environment temperature has dropped to around room temperature, the raised bimetallic structure returns to its initial state (i.e., the thermocouple temperature measuring point is located at the center of the radial cross-section of the tubular structure), which makes it easy to disassemble and assemble the thermocouple. Similarly, the bimetallic strip is inconvenient to disassemble when it is raised, and the thermocouple temperature measuring point is worn or damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram (1) of the elastic mounting bracket based on the bimetallic strip in the present invention.

[0020] Figure 2 This is a structural schematic diagram (2) of the elastic mounting bracket based on the bimetallic strip in the present invention.

[0021] Figure 3 It is a schematic structural diagram of a thermocouple using an elastic mounting bracket based on a bimetallic strip in the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to specific embodiments.

[0023] As attached Figure 1 As shown, the elastic mounting bracket based on the bimetallic strip in the present invention includes a first bimetallic strip 1-1, a second bimetallic strip 1-2, a central connecting strip 4, a first guide tube 3-1 and a second guide tube 3-2, wherein: the first bimetallic strip and the first guide tube, as well as the second guide tube and the second bimetallic strip are fixedly arranged on both sides of the central connecting strip respectively; the first bimetallic strip and the second bimetallic strip are located on one side of the plane where the central connecting strip is located, and the first guide tube and the second guide tube are located on the other side of the plane where the central connecting strip is located.

[0024] In actual design and use, in order to facilitate the installation of thermocouples, the two sides of the central connecting plate are selected to be fixedly connected to the first guide tube and the second guide tube respectively to form a gap, and the first bimetallic plate and the second bimetallic plate fixedly connected to the central connecting plate are arranged in the gap, so that the two thermocouples pass through the outlet 3-1-1 of the first guide tube and the outlet 3-2-1 of the second guide tube respectively, and can reach the outer surface of the first bimetallic plate and the second bimetallic plate (that is, in actual use, the surface of the first bimetallic plate and the second bimetallic plate facing the inner wall of the pipe).

[0025] In actual design and use, in order to facilitate long-distance thermocouple threading, threading holes 4-1 are selected to be set on the central connecting piece, and are preferably set symmetrically on the central connecting piece.

[0026] During actual design and use, in order to facilitate the fixation of the thermocouple located on the surface of the bimetallic strip, a first fixing buckle 2-1 is set on the outer surface of the first bimetallic strip, and a second fixing buckle 2-2 is set on the outer surface of the second bimetallic strip. The two fixing buckles cooperate with the first guide tube and the second guide tube respectively to tighten the fixation of the thermocouple and the thermocouple temperature measuring point at the front end.

[0027] Since it is necessary to lay thermocouples for temperature measurement in long-distance pipelines during actual installation, and there are often welds in the pipelines, in order to avoid installation inconvenience, the size of the entire elastic mounting bracket is selected to be smaller than the inner diameter of the pipeline. It is also possible to consider setting the end 6-1 of the first bimetallic strip to an arc shape and bending it toward the second bimetallic strip, and the end 6-2 of the second bimetallic strip to an arc shape and bending it toward the first bimetallic strip. In this way, during long-distance installation, the ends of the two bimetallic strips are both close to the center of the pipeline to minimize the impact of defects such as residual welds in the pipeline on the installation.

[0028] In actual installation, it is necessary to arrange multiple temperature measuring points along the length of the pipeline. It is necessary to connect the above-mentioned multiple elastic mounting brackets in series into a whole, and select to set the connecting component 5 on the central connecting piece 4.

[0029] like Figure 2 As shown, a plurality of elastic mounting brackets are provided on a connecting component 5 having a certain length, that is, the connecting component between the plurality of elastic mounting brackets is a whole, connecting the central connecting piece of the plurality of elastic mounting brackets (the connecting component penetrates and fixes the central connecting piece of the plurality of elastic mounting brackets, and a through hole is provided at the central position of the central connecting piece to facilitate the connection and fixation of the connecting component). This integral connecting component is a solid structure or a hollow structure 5-1. During actual installation and use, a hollow structure is preferred to facilitate inflation into the installation pipe through the hollow structure.

[0030] In actual use, it is necessary to pre-connect multiple elastic mounting brackets and install and fix the thermocouples according to the actual needs of the project. At this time, transportation issues need to be considered. For example, it is impossible to package and fix the thermocouples and mounting brackets over long distances. The long products need to be wound on a coil and then packaged, fixed and transported. Figure 1 As shown, the connecting component 5 is provided on the central connecting piece 4 in a segmented manner and is not integral. Instead, a connecting component is provided on the central connecting piece of each elastic mounting bracket (a through hole is provided at the center of the central connecting piece, and the connecting component is fixedly inserted through and fixed in the through hole). The connecting components of each elastic mounting bracket are connected by a secondary connecting component (not shown) made of a relatively flexible material compared to the connecting component to form an integral connecting component; or the integral connecting component is made of a flexible material. Of course, the connecting component and the secondary connecting component are fixedly connected by means of threads or welding, and the integral connecting component formed by the connecting component and the secondary connecting component is a solid structure or a hollow structure 5-1.

[0031] In the technical solution of the present invention, first, the working environment temperature of the thermocouple can be obtained according to the engineering design requirements. Secondly, according to the working environment temperature and the pipe structure (length, inner diameter, wall thickness, material and pipe welding conditions) of the thermocouple to be installed, the entire elastic mounting bracket based on the bimetallic strip and the size of the thermocouple are designed and a bimetallic strip that adapts to the environment is selected. For example, a connecting component is selected to align with the center of the pipeline, and two thermocouples pass through the first guide tube 3-1 and the second guide tube 3-2 on both sides respectively, reach the outer surface of the first bimetallic strip 1-1 and the second bimetallic strip 1-2, and fix the temperature measuring points of the two thermocouples by the first fixing buckle 2-1 and the second fixing buckle 2-2; because the bimetallic strips will expand after being affected by the working environment temperature, that is, the first bimetallic strip 1-1 and the second bimetallic strip 1-2 will bend and tilt toward the inner surface of the pipeline respectively, thereby driving the thermocouple temperature measuring points on both sides to contact the inner surface of the pipeline, realizing "wall detection"; during installation, corresponding design is required based on the distance between the bimetallic strips on both sides of the elastic mounting bracket and the inner surface of the pipeline, as well as the bending deformation size of the bimetallic strip material under the working environment temperature, so as to meet the actual use requirements.

[0032] As attached Figure 3, using the thermocouple based on the elastic mounting bracket of the bimetallic strip, along the length of the installation pipe, for each elastic mounting bracket based on the bimetallic strip, the two thermocouple temperature measuring armor wires 6 and 7 respectively pass through the first guide tube 3-1 and the second guide tube 3-2 on both sides, and reach the outer surface of the first bimetallic strip 1-1 and the second bimetallic strip 1-2, preferably through the first fixing buckle 2-1 and the second fixing buckle 2-2 to fix the temperature measuring points 6-1 and 7-1 of the two thermocouples; the remaining thermocouples pass through the wire threading hole or the gap between the elastic mounting bracket and the inner wall of the pipe, and reach the next elastic mounting bracket based on the bimetallic strip, until the last elastic mounting bracket based on the bimetallic strip, and each thermocouple temperature measuring armor wire is connected to the junction box (through the line).

[0033] It should be noted that, when a bimetallic strip structure is adopted, for a certain temperature measuring location on the pipeline, two thermocouple temperature measuring points measure the temperature on the circumference surrounding the location; of course, it is also possible to consider using only one thermocouple installed and fixed on one of the bimetallic strips. In this way, for a certain temperature measuring location on the pipeline, the temperature measurement of a single thermocouple temperature measuring point can be achieved. At this time, the bimetallic strip structure is still in an expanded state, realizing the relative fixation of the elastic mounting bracket based on the bimetallic strip and the inner surface of the pipeline.

[0034] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A thermocouple based on a bimetallic elastic mounting bracket, characterized in that: Along the length direction of the installation pipe, for each elastic mounting bracket based on the bimetallic strip, the thermocouple temperature measuring structure passes through the first guide tube and / or the second guide tube and reaches the outer surface of the first bimetallic strip and / or the second bimetallic strip; The remaining thermocouple temperature measurement structures are installed at the next elastic mounting bracket based on a bimetallic strip, until they are installed at the last elastic mounting bracket based on a bimetallic strip. The elastic mounting bracket based on bimetallic strips includes a first bimetallic strip, a second bimetallic strip, a central connecting strip, a first guide tube and a second guide tube, wherein: the first bimetallic strip, the first guide tube, and the second guide tube and the second bimetallic strip are fixedly arranged on both sides of the central connecting strip; the first bimetallic strip and the second bimetallic strip are located on one side of the plane where the central connecting strip is located, and the first guide tube and the second guide tube are located on the other side of the plane where the central connecting strip is located; the two sides of the central connecting strip are fixedly connected to the first guide tube and the second guide tube respectively and form a gap, and the first bimetallic strip and the second bimetallic strip fixedly connected to the central connecting strip are arranged in the gap; wire threading holes are symmetrically arranged on the central connecting strip, and a connecting component is arranged on the central connecting strip, and the connecting component is an integral connecting component, and the integral connecting component is a hollow structure.

2. The thermocouple based on the elastic mounting bracket of bimetallic strip according to claim 1, characterized in that: The thermocouple temperature measurement structure is a thermocouple temperature measurement armored wire.

3. The thermocouple based on the elastic mounting bracket of bimetallic strip according to claim 1 or 2, characterized in that: The end of the first bimetallic strip is arranged in an arc shape and is bent toward the second bimetallic strip, and the end of the second bimetallic strip is also arranged in an arc shape and is bent toward the first bimetallic strip.

4. The thermocouple based on the elastic mounting bracket of bimetallic strip according to claim 1 or 2, characterized in that: A first fixing buckle is arranged on the outer surface of the first bimetallic strip, and a second fixing buckle is arranged on the outer surface of the second bimetallic strip.

5. The thermocouple based on the elastic mounting bracket of bimetallic strip according to claim 3, characterized in that: A first fixing buckle is arranged on the outer surface of the first bimetallic strip, and a second fixing buckle is arranged on the outer surface of the second bimetallic strip.

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