Elliptical-section elastic centering support and thermocouple using same

Abstract

The utility model discloses an elastic centering support with an elliptical cross section and a thermocouple using the same. The elastic centering support comprises a fixing ring, two torsion springs with different sizes and two sliding blocks connected with the torsion springs. According to the technical scheme of the utility model, the long shaft and the short shaft with elliptical cross sections are designed, two torsion springs with different sizes are adopted to respectively correspond to the long shaft and the short shaft of the ellipse, and after the channel is mounted at the inlet of the structure to be subjected to temperature measurement, the two torsion springs are deformed and rebounded to different degrees and respectively reach the inner wall of the reactor in the directions of the long shaft and the short shaft; the inner wall of the structure to be subjected to temperature measurement is supported, the effect of fixing the relative position is achieved, and therefore the purpose that the temperature measurement core body is arranged in the middle is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, and more particularly to a thermocouple mounting bracket suitable for an elliptical cross-section reactor and a thermocouple thereof. 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 conditions, reaction devices to be measured temperature often have special structures, such as very long tubular structures or reaction devices with different inner diameters. It is necessary to set multiple thermocouple temperature measurement points in the length direction, and the thermocouple temperature measurement points need to be centered in the metal tubular structure for temperature measurement. Therefore, the applicant's R&D team designed and applied for Chinese patents "Centralized support mounting bracket and thermocouple using this bracket" (application number 2021224760581, application date October 14, 2021), "Centralized elastic mounting bracket and thermocouple using this bracket" (application number 2021224827098, application date October 14, 2021), and "Compressible elastic expansion card and thermocouple using this expansion card" (application number 2022200846354, application date January 13, 2022). In specific use and promotion, a reactor with different inner diameters is encountered. The inner diameter of the channel used to insert the thermocouple into the reaction device is relatively small (the cross section of the installation channel is usually circular), and the inner diameter of the main device for the reaction is relatively large (this cross section is elliptical), so that it is convenient to use a smaller sealing device to effectively seal the entrance; such a reaction device requires the thermocouple to be able to pass through the narrow installation channel and to achieve the centering of the temperature measuring point inside the main device, and at the same time, it can be easily taken out through the narrow installation channel. The existing technology "compressible elastic expansion card and thermocouple using this expansion card" (application number 2022200846354, application date January 13, 2022) can be used in the installation channel, but when entering the main structure of the reactor, since the torsion springs distributed around the thermocouple temperature measuring core are basically the same size, it is inevitable that part of the torsion spring can contact the inner wall of the reactor, while the other part cannot make contact, so that the centering of the temperature measuring point cannot be guaranteed in actual use, which brings inconvenience to temperature measurement and monitoring. Utility Model Content

[0004] The utility model overcomes the deficiencies in the prior art and provides an elliptical cross-section elastic centering bracket and a thermocouple thereof in view of the deficiencies in the prior art.

[0005] The technical purpose of the present invention is achieved through the following technical solutions.

[0006] An elliptical cross-section elastic centering bracket comprises a fixed ring, a first torsion spring, a first sliding ring, a second torsion spring and a second sliding ring, wherein the first torsion spring is fixedly connected at its head and tail ends to the fixed ring and the first sliding ring respectively, and the second torsion spring is fixedly connected at its head and tail ends to the fixed ring and the second sliding ring respectively;

[0007] The first torsion spring has a protrusion formed in the middle portion thereof, which faces the inner wall of the structure to be measured, and the protrusion is used to contact the inner wall in the direction of the major axis of the elliptical cross section. The second torsion spring has a protrusion formed in the middle portion thereof, which faces the inner wall of the structure to be measured, and the protrusion is used to contact the inner wall in the direction of the minor axis of the elliptical cross section.

[0008] Preferably, a limiting through hole is provided on the side wall of the fixing ring and passes through the fixing ring, and the limiting screw is connected to the limiting through hole.

[0009] The number of the first torsion springs is 2-4, and they are evenly arranged between the fixed ring and the first sliding ring along the center of the fixed ring, that is, the angles between adjacent first torsion springs are the same.

[0010] The number of the second torsion springs is 2-4, and they are evenly arranged between the fixed ring and the second sliding ring along the center of the fixed ring, that is, the angles between adjacent second torsion springs are the same.

[0011] Using the thermocouple of the elliptical cross-section elastic center bracket, along the length direction of the structure to be temperature measured, for each elliptical cross-section elastic center bracket, a thermocouple temperature measuring core passes through the fixed ring, the second sliding ring and the first sliding ring of the elliptical cross-section elastic center bracket from top to bottom in sequence, and the fixed ring and the thermocouple temperature measuring core are fixed, so that the bracket will not move along the outer wall of the thermocouple temperature measuring core. The thermocouple temperature measuring cores are all connected to the junction box through wires.

[0012] The thermocouple temperature measurement core adopts thermocouple temperature measurement armored wire, and adopts single-branch multi-point thermocouple armored wire to realize temperature measurement of multiple points along the length direction of the reaction device by one thermocouple temperature measurement core.

[0013] The temperature measuring part of the thermocouple is the thermocouple temperature measuring core located between the fixed ring and the first sliding ring of the elliptical cross-section elastic centering bracket, or the thermocouple temperature measuring core between adjacent elliptical cross-section elastic centering brackets.

[0014] The technical solution of the present invention continues to adopt the design ideas of the prior art on the coordination of torsion springs and slip rings, adopts a simple structure, and is designed for the major and minor axes of the elliptical cross-section. Two torsion springs of different sizes are used to correspond to the major and minor axes of the ellipse respectively. After passing through the installation channel at the entrance of the temperature-measured structure, the two torsion springs will undergo different degrees of deformation and rebound, reaching the inner wall of the reactor in the major and minor axis directions respectively, to support the inner wall of the temperature-measured structure and play a role in fixing the relative position, thereby achieving the purpose of setting the temperature measuring core in the center. The two sliding blocks are used in conjunction with torsion springs of different sizes, which facilitates the overall installation and / or removal. At the same time, this solution leaves more space inside the temperature-measured structure to facilitate the smooth passage of the fluid or catalyst inside the temperature-measured structure; even if a stirring device is set in the reaction device, the position of the thermocouple temperature measuring core is fixed due to the function of the bracket, reducing or avoiding the impact and influence of the stirring device and the material flow caused by stirring on the thermocouple, thereby improving the service life of the temperature measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0017] Figure 3 It is a schematic diagram of the working state of the utility model;

[0018] In the figure: 1 is a fixed ring, 2 is a first torsion spring, 3 is a first sliding ring, 4 is a second torsion spring, 5 is a second sliding ring, 6 is a thermocouple temperature measuring core, and 7 is an inner wall of the reactor.

[0019] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below through specific embodiments.

[0021] like Figure 1 —3, and combined with the records of the prior art “Compressible elastic expansion card and thermocouple using this expansion card” (application number 2022200846354, application date January 13, 2022), the technical solution of the utility model is described as follows.

[0022] along Figure 1 and Figure 2 In the vertical direction, Figure 1 and 2The top ends of the first torsion spring 2 and the second torsion spring 4 are defined as the head ends of the first torsion spring 2 and the second torsion spring 4. Figure 1 and 2 The bottom ends of the first torsion spring 2 and the second torsion spring 4 are defined as the tail ends of the first torsion spring 2 and the second torsion spring 4.

[0023] The elliptical cross-section elastic centering bracket of the utility model comprises a fixed ring, a first torsion spring, a first sliding ring, a second torsion spring and a second sliding ring, wherein the head and tail ends of the first torsion spring are respectively fixedly connected to the fixed ring and the first sliding ring, and the head and tail ends of the second torsion spring are respectively fixedly connected to the fixed ring and the second sliding ring;

[0024] The first torsion spring has a protrusion formed in the middle portion thereof, which faces the inner wall of the structure to be measured, and the protrusion is used to contact the inner wall in the direction of the major axis of the elliptical cross section. The second torsion spring has a protrusion formed in the middle portion thereof, which faces the inner wall of the structure to be measured, and the protrusion is used to contact the inner wall in the direction of the minor axis of the elliptical cross section.

[0025] Preferably, a limiting through hole is provided on the side wall of the fixing ring and passes through the fixing ring, and the limiting screw is connected to the limiting through hole.

[0026] When in use, the thermocouple temperature measuring core 6 is inserted between the fixed ring, the first sliding ring and the second sliding ring. The fixed ring is directly fixed to the thermocouple temperature measuring core, such as spot welding, or connected to the limiting through-hole thread through a limit screw, so as to achieve the purpose of fixing the thermocouple temperature measuring core to the fixed ring using the limit screw.

[0027] The external force compresses the first torsion spring and the second torsion spring, that is, compresses the protruding structure of the two torsion springs, thereby reducing the distance between the first torsion spring, the second torsion spring and the thermocouple temperature measuring core 6 to the point where they can extend into the interior of the installation channel from the narrow entrance of the installation channel (at this time, the first torsion spring and the second torsion spring are compressed by the inner wall of the installation channel). The fixed ring 1 and the thermocouple temperature measuring core 6 are fixed. Under the action of the first torsion spring and the second torsion spring, the first sliding ring and the second sliding ring move along the length direction of the thermocouple temperature measuring core and away from the fixed ring 1. At this time, the torsion spring 3 is in a compressed state. Entering from a narrow installation channel into a reaction device with a relatively large inner diameter, the cross-section of this reaction device is elliptical. The compression of the first and second torsion springs by external forces disappears, and the compressed protrusions in the middle of the first and second torsion springs are restored. The first and second sliding rings move upward along the length of the thermocouple temperature measurement core and approach the fixed ring 1. At this time, the first and second torsion springs respectively contact and support the inner wall of the reaction device, achieving the purpose of "centering detection" of the thermocouple temperature measurement core 6. Due to the different mechanical properties of the first and second torsion springs, such as the length and mechanical properties of the first torsion spring being greater than those of the second torsion spring, the "fixed ring-second sliding ring-first sliding ring" sequence is arranged along the length of the thermocouple temperature measurement core. Given that the cross-section of the reaction device is elliptical, with a major axis and a minor axis, the two torsion springs with different mechanical properties will contact and support the inner wall of the reaction device corresponding to the major and minor axes of the ellipse, respectively.

[0028] If replacement is required, the elastic centering bracket and thermocouple in the reaction device are taken out from the narrow installation channel, and the fixing ring 1 and the thermocouple temperature measuring core 6 are fixed. When entering the narrow installation channel, the two torsion springs are compressed by the inner wall of the installation channel. Under the action of the two torsion springs, the first sliding ring and the second sliding ring move along the length direction of the thermocouple temperature measuring core and away from the fixing ring. At this time, the first torsion spring and the second torsion spring are in a compressed state; after being taken out from the narrow installation channel, the compressed protruding structure in the middle of the first torsion spring and the second torsion spring is restored. During installation and use, it is necessary to carry out corresponding design based on the inner diameter of the installation channel, the inner diameter of the main reaction device (the major axis and minor axis of the elliptical cross section), and the performance of the torsion spring to determine the protruding structure of the torsion spring and the length and mechanical properties of the torsion spring to meet the needs of actual use.

[0029] There are two first torsion springs, which are evenly arranged between the fixed ring and the first sliding ring along the center of the fixed ring. That is, the angles between adjacent first torsion springs are the same, 180 degrees.

[0030] There are two second torsion springs, which are evenly arranged between the fixed ring and the second sliding ring along the center of the fixed ring. That is, the angles between adjacent second torsion springs are the same, 180 degrees.

[0031] Using the thermocouple of the elliptical cross-section elastic center bracket, along the length direction of the structure to be temperature measured, for each elliptical cross-section elastic center bracket, a thermocouple temperature measuring core 6 (here taking the thermocouple temperature measuring core as an example) passes through the fixed ring, the second sliding ring and the first sliding ring of the elliptical cross-section elastic center bracket from top to bottom in sequence, and the fixed ring and the thermocouple temperature measuring core are fixed, so that the bracket will not move along the outer wall of the thermocouple temperature measuring core 6. The thermocouple temperature measuring core 6 is connected to the junction box through a line.

[0032] The thermocouple temperature measurement core 6 adopts a thermocouple temperature measurement armored wire, and adopts a single-branch multi-point thermocouple armored wire to achieve temperature measurement at multiple points along the length direction of the reaction device using one thermocouple temperature measurement core.

[0033] The temperature measuring part of the thermocouple is the thermocouple temperature measuring core located between the fixed ring and the first sliding ring of the elliptical cross-section elastic centering bracket, or the thermocouple temperature measuring core between adjacent elliptical cross-section elastic centering brackets.

[0034] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used here can be interpreted accordingly. Relational terms such as "first" and "second" are merely used to distinguish one from another component with the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0035] 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 technical personnel in this field without expending creative labor falls within the scope of protection of the present invention.

Claims

1. Elliptical cross-section elastic centering bracket, characterized in that: It includes a fixed ring, a first torsion spring, a first sliding ring, a second torsion spring and a second sliding ring, wherein the first torsion spring is fixedly connected to the fixed ring and the first sliding ring at both ends, and the second torsion spring is fixedly connected to the fixed ring and the second sliding ring at both ends; A protruding structure is formed in the middle of the first torsion spring, which is directed toward the inner wall of the structure to be temperature measured, and the protruding structure is used to achieve contact with the inner wall in the direction of the major axis of the elliptical cross section; A protruding structure is formed in the middle of the second torsion spring, which is directed toward the inner wall of the structure to be temperature measured. This protruding structure is used to achieve contact with the inner wall in the direction of the minor axis of the elliptical cross section. The length of the first torsion spring is greater than that of the second torsion spring. Along the length direction of the thermocouple temperature measuring core, the second sliding ring is arranged between the fixed ring and the first sliding ring.

2. The elastic centering bracket with an elliptical cross-section according to claim 1, characterized in that: The number of the first torsion springs is 2-4, and they are evenly arranged between the fixed ring and the first sliding ring along the center of the fixed ring.

3. The elastic centering bracket with an elliptical cross-section according to claim 1 or 2, characterized in that: The number of the second torsion springs is 2-4, and they are evenly arranged between the fixed ring and the second sliding ring along the center of the fixed ring.

4. The elastic centering bracket with an elliptical cross-section according to claim 1 or 2, characterized in that: A limiting through hole penetrating the fixing ring is provided on the side wall of the fixing ring, and a limiting screw is connected to the limiting through hole.

5. The elastic centering bracket with an elliptical cross-section according to claim 3, characterized in that: A limiting through hole penetrating the fixing ring is provided on the side wall of the fixing ring, and a limiting screw is connected to the limiting through hole.

6. A thermocouple using the elliptical cross-section elastic centering bracket according to any one of claims 1 to 5, characterized in that: Along the length direction of the structure to be measured, for each elliptical cross-section elastic center bracket, the thermocouple temperature measuring core passes through the fixed ring, the second sliding ring and the first sliding ring of the elliptical cross-section elastic center bracket from top to bottom, and the fixed ring and the thermocouple temperature measuring core are fixed, so that the bracket will not move along the outer wall of the thermocouple temperature measuring core. The thermocouple temperature measuring cores are connected to the junction box through wires.

7. The thermocouple according to claim 6, characterized in that The thermocouple temperature measuring core adopts thermocouple temperature measuring armored wire.

8. The thermocouple according to claim 7, characterized in that The thermocouple temperature measurement core adopts a single multi-point thermocouple armored wire to achieve temperature measurement at multiple points along the length direction of the reaction device.

9. The thermocouple according to claim 6, characterized in that The temperature measuring part of the thermocouple is the thermocouple temperature measuring core located between the fixed ring and the first sliding ring of the elliptical cross-section elastic centering bracket, or the thermocouple temperature measuring core between adjacent elliptical cross-section elastic centering brackets.

10. The thermocouple according to claim 7 or 8, characterized in that: The temperature measuring part of the thermocouple is the thermocouple temperature measuring core located between the fixed ring and the first sliding ring of the elliptical cross-section elastic centering bracket, or the thermocouple temperature measuring core between adjacent elliptical cross-section elastic centering brackets.

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