Heating rod temperature measuring device and heating rod

Abstract

The present invention provides a heating rod temperature measuring device and a heating rod. The heating rod temperature measuring device comprises a temperature measuring bracket and a plurality of thermocouples fixed on the temperature measuring bracket. The temperature measuring bracket is suitable for being inserted into the shell of the heating rod. The thermocouple comprises a temperature measuring end. A partial radial cross section of the temperature measuring bracket constitutes a temperature measuring surface. The temperature measuring end is located on the temperature measuring surface and forms a temperature measuring point with the contact point of the shell. Each of the temperature measuring surfaces comprises at least one temperature measuring point. The heating rod temperature measuring device is suitable for special-shaped tube heating rods. First, a plurality of thermocouples are fixed on the temperature measuring bracket, and then the temperature measuring bracket is inserted into the shell of the heating rod. The position of the temperature measuring bracket can be moved, so that the temperature measuring end of the thermocouple is accurately positioned at the designed position, forming a plurality of temperature measuring surfaces and temperature measuring points, and realizing multi-point precise temperature measurement of the heating rod.

Description

Technical Field

[0001] The present invention relates to the technical field of heating rods, and in particular to a heating rod temperature measuring device and a heating rod. Background Art

[0002] In the prior art, heating rods used in high temperature and high pressure environments are generally of a special-shaped tube structure. This type of heating rod has structural features such as hollow thin walls, spirals, petal shapes, and large aspect ratios. Compared with ordinary round heating rods, it has higher structural strength and heating efficiency.

[0003] However, due to the complex structure of the special-shaped heating rod, the axial and circumferential positions of the most concave point of the inner wall of each radial section of the heating rod are different, and the diameter of the inscribed circle of the most concave point of the inner wall is very small. It is very difficult to achieve multi-point and multi-section temperature measurement on the inner wall of such a heating rod. As the length of the heating rod increases, the difficulty of temperature measurement will further increase. Summary of the invention

[0004] The problem solved by the invention is how to realize multi-section and multi-point precise temperature measurement of a special-shaped tube heating rod.

[0005] In order to solve the above problems, the present invention provides a heating rod temperature measuring device, including a temperature measuring bracket and a plurality of thermocouples fixed on the temperature measuring bracket, the temperature measuring bracket is suitable for being inserted into the shell of the heating rod, the thermocouple includes a temperature measuring end, a partial radial cross-section of the temperature measuring bracket constitutes a temperature measuring surface, the temperature measuring end is located on the temperature measuring surface and forms a temperature measuring point with the contact point of the shell, and each of the temperature measuring surfaces includes at least one temperature measuring point.

[0006] Compared with the prior art, the heating rod temperature measuring device of the present invention is suitable for special-shaped tube heating rods. First, multiple thermocouples are fixed on a temperature measuring bracket, and then the temperature measuring bracket is inserted into the shell of the heating rod. The position of the temperature measuring bracket can be moved, so that the temperature measuring end of the thermocouple can be accurately positioned at the designed position, forming multiple temperature measuring surfaces and temperature measuring points, thereby realizing multi-point precise temperature measurement of the heating rod.

[0007] Optionally, the heating rod temperature measuring device includes at least two temperature measuring surfaces, each of which includes two temperature measuring points, thereby achieving multi-section and multi-point temperature measurement of the heating rod, ensuring accurate temperature measurement on each temperature measuring surface.

[0008] Optionally, the connecting line of the two temperature measuring points on the same temperature measuring surface is a temperature measuring line, and the temperature measuring line intersects with the axis of the temperature measuring bracket. Thus, the two temperature measuring points on the same temperature measuring surface can measure the temperature of the most concave points of the two inner walls of the heating rod shell, and the temperature measuring points are reasonably designed and have high temperature measurement accuracy.

[0009] Optionally, the angle between two adjacent temperature measuring lines on the temperature measuring surfaces arranged along the axial direction of the temperature measuring bracket satisfies the following relationship:

[0010] R = 360° × L / M;

[0011] Wherein, R is the angle between two temperature measuring lines on adjacent temperature measuring surfaces, L is the distance between adjacent temperature measuring surfaces, and M is the pitch of the shell of the heating rod.

[0012] Therefore, the temperature measuring points on different temperature measuring surfaces are all located at the most concave point of the inner wall of the heating rod shell, the temperature measuring points are reasonably designed, and the temperature measuring accuracy is high.

[0013] Optionally, a plurality of positioning grooves are provided on the side wall of the temperature measuring bracket, and each of the thermocouples is arranged in the corresponding positioning groove. Thus, the positioning grooves are provided on the temperature measuring bracket, and the thermocouples are fixed in the positioning grooves, which has a simple structure, reliable connection and positioning, and is convenient for assembly and disassembly.

[0014] Optionally, the temperature measuring bracket is provided with a plurality of elastic members, and the elastic members are suitable for pushing the corresponding temperature measuring end out of the positioning groove so that the temperature measuring end contacts the shell. Thus, the elastic members can keep the temperature measuring end in contact with the inner wall of the heating rod shell, ensuring accurate temperature measurement without using an additional fixing structure and without causing damage to the heating rod.

[0015] Optionally, the elastic member is a spring, a leaf spring or a rubber rod. Thus, the elastic member has a simple structure and high reliability, and is suitable for being installed on a small-sized temperature measuring bracket.

[0016] Optionally, the number of the positioning grooves is 2-6, the temperature measuring ends of the two thermocouples arranged opposite to each other are located on the same temperature measuring surface, and the two ends of the elastic member are respectively against the two temperature measuring ends on one temperature measuring surface. In this way, it is possible to achieve multi-section and multi-point precise temperature measurement in a small-sized and slender heating rod shell, and the temperature measuring end of the thermocouple is attached to the inner wall of the heating rod shell through the elastic member, so as to achieve precise temperature measurement without damaging the inner wall of the shell.

[0017] Optionally, a nano filler is provided between the temperature measuring bracket and the shell, thereby filling and sealing with the nano filler to ensure that the heating rod shell works normally under high temperature and high pressure without deformation and leakage.

[0018] The present invention also provides a heating rod, comprising the above-mentioned heating rod temperature measuring device.

[0019] Compared with the prior art, the heating rod of the present invention has a specially designed temperature measuring device. First, multiple thermocouples are fixed on a temperature measuring bracket, and then the temperature measuring bracket is inserted into the shell of the heating rod. The position of the temperature measuring bracket can be moved, so that the temperature measuring end of the thermocouple can be accurately positioned at the designed position, forming multiple temperature measuring surfaces and temperature measuring points, thereby realizing multi-section and multi-point precise temperature measurement of the heating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a heating rod temperature measuring device in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0023] Figure 4 The cross section of the heating rod temperature measuring device in the embodiment of the present invention Figure 1 ;

[0024] Figure 5 The cross section of the heating rod temperature measuring device in the embodiment of the present invention Figure 2 ;

[0025] Figure 6 It is a cross-sectional view of the temperature measuring surface of the heating rod in the embodiment of the present invention;

[0026] Figure 7 It is a cross-sectional view of another temperature measuring surface of the heating rod in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1-temperature measuring bracket, 2-thermocouple, 21-temperature measuring end, 3-positioning groove, 4-elastic part, 5-shell. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar symbols and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

[0032] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The heating rod temperature measuring device of this embodiment is designed for precision small-sized thin-walled special-shaped tube heating rods running in high-temperature and high-pressure water. Special-shaped tube heating rods have the structural characteristics of hollow thin walls, spirals, petal shapes, and large aspect ratios. The axial and circumferential positions of the most concave points of the inner wall of each section are different, and the diameter of the inscribed circle of the most concave point is very small, which makes it difficult to achieve multi-section and multi-point temperature measurement of such heating rods. As the length of the heating rod increases, the position of its temperature measurement point is difficult to accurately control, the heating rod is easy to deform, and the sealing of the heating rod becomes more prominent.

[0035] Combination Figures 1 to 5 As shown, the temperature measuring device of the heating rod of this embodiment includes a temperature measuring bracket 1 and a plurality of thermocouples 2 fixed on the temperature measuring bracket 1. The thermocouple 2 includes a temperature measuring end 21. The contact point between the temperature measuring end 21 and the shell 5 is a temperature measuring point. The radial section of the temperature measuring bracket 1 with the temperature measuring point constitutes a temperature measuring surface. The temperature measuring bracket 1 is suitable for being inserted into the shell 5 of the heating rod, so that the thermocouple 2 can be fixed in the shell 5. This temperature measuring device has a simple structure and high installation efficiency. The position of the temperature measuring bracket 1 can be moved, and the position of the temperature measuring surface and the temperature measuring point can be accurately adjusted to achieve precise temperature measurement of the heating rod. In addition, the temperature measuring bracket 1 can support the shell 5 of the heating rod to ensure that the shell 5 will not deform in a high temperature and high pressure environment.

[0036] Combination Figure 4As shown, in this embodiment, the number of thermocouples 2 is 4, and the contact point between the temperature measuring end 21 of each thermocouple 2 and the shell 5 can form a temperature measuring point. As the number of thermocouples 2 increases, the number of temperature measuring points increases accordingly, and the radial section of the temperature measuring bracket 1 with temperature measuring points can constitute a temperature measuring surface. Further, it is defined that the heating rod temperature measuring device includes at least two temperature measuring surfaces, and each temperature measuring surface has two temperature measuring points, so that multi-section and multi-point temperature measurement of the heating rod can be achieved, and the temperature measurement of each temperature measuring surface is guaranteed to be accurate.

[0037] In other embodiments, the number of thermocouples 2 may be 2-6. Since the diameter of the inscribed circle at the most concave point of the inner wall of the heating rod housing 5 is very small, the number of thermocouples 2 should not be too large, otherwise the thermocouples 2 are not easy to fix, and the thermocouples 2 may interfere with each other. If it is necessary to further increase the temperature measurement points, a temperature measurement bracket 1 can be inserted from each end of the heating rod housing 5. Each temperature measurement bracket 1 can be installed with up to 6 thermocouples 2, so that 12 temperature measurement points can be formed in the heating rod housing 5.

[0038] Combination Figure 1 and Figure 4 As shown, a plurality of positioning grooves 3 are provided on the side wall of the temperature measuring bracket 1, and the number of the positioning grooves 3 matches the number of the thermocouples 2. Each thermocouple 2 is arranged in the corresponding positioning groove 3, and the position angle of the thermocouple 2 and the temperature measuring point can be limited by the position of the positioning groove 3 on the temperature measuring bracket 1. The positioning groove 3 plays a limiting role to ensure that the position of the temperature measuring end 21 of the thermocouple 2 does not shift. The positioning groove 3 has a simple structure, the thermocouple 2 is reliably connected in the positioning groove 3, and is easy to disassemble and assemble. The positioning groove 3 can also play a protective role to prevent the thermocouple 2 from being damaged.

[0039] Combination Figure 2 , Figure 3 and Figure 5 As shown, the temperature measuring bracket 1 is provided with a plurality of elastic members 4, the extended ends of the elastic members 4 are connected to the thermocouple 2, and are used to push the temperature measuring end 21 of the thermocouple 2 so that the temperature measuring end 21 extends from the positioning groove 3 and contacts the inner wall of the shell 5 of the heating rod. Figure 5 As shown, in this embodiment, the elastic member 4 is a spring, which is always kept in a compressed state and has a tendency to recover deformation, so it will apply an outward thrust to the temperature measuring end 21 of the thermocouple 2, ensuring that the temperature measuring end 21 is in contact with the inner wall of the shell 5, ensuring accurate temperature measurement. In other embodiments, the elastic member 4 can be other retractable elements, such as a rubber rod, a reed, etc. The elastic member 4 has a simple structure, does not require the use of an additional fixing structure, and will not cause damage to the heating rod.

[0040] Combination Figure 4 and Figure 5As shown, the heating rod temperature measuring device of this embodiment includes two temperature measuring surfaces, and each temperature measuring surface has two temperature measuring points. The connecting line of the two temperature measuring points on the same temperature measuring surface is defined as the temperature measuring line, and the temperature measuring line intersects with the axis of the temperature measuring bracket 1, so that the two temperature measuring points on the same temperature measuring surface can measure the temperature of the most concave points of the two opposite inner walls of the heating rod shell 5. The temperature measuring points are reasonably designed and the temperature measuring accuracy is high. The elastic member 4 is inserted into the temperature measuring bracket 1, and the two ends of the elastic member 4 are respectively connected to the temperature measuring end 21 of a thermocouple 2. One elastic member 4 can push the two temperature measuring ends 21 to extend outward, saving material use.

[0041] Furthermore, for the petal-shaped heating rod, there is a temperature measuring line on each of the two adjacent temperature measuring surfaces, and the angle between the two temperature measuring lines satisfies the following relationship: R = 360° × L / M;

[0042] Wherein, R is the angle between two temperature measuring lines on adjacent temperature measuring surfaces, L is the distance between adjacent temperature measuring surfaces, and M is the pitch of the shell 5 of the heating rod.

[0043] In this way, the temperature measuring points on different temperature measuring surfaces can be located at the most concave point of the inner wall of the heating rod shell 5, the temperature measuring points are reasonably designed, and the temperature measuring accuracy is high. For example, in this embodiment, the distance L between the first temperature measuring surface and the second temperature measuring surface is 0.1m, and the pitch M of the heating rod shell 5 is 0.5m, then the angle R between the temperature measuring line on the first temperature measuring surface and the temperature measuring line on the second temperature measuring surface is 72°, so that the temperature measuring points on the two temperature measuring surfaces are located at the most concave point of the inner wall of the heating rod shell 5, and the temperature measuring position is accurate.

[0044] Combination Figure 6 and Figure 7 As shown, the heating rod of this embodiment includes a shell 5 and the heating rod temperature measuring device in the above embodiment. The cross section of the shell 5 is petal-shaped, the inner wall of the shell 5 has four most concave points, and the shell 5 has a spiral feature in the axial direction. The heating rod temperature measuring device includes a temperature measuring bracket 1 and four thermocouples 2 fixed on the temperature measuring bracket 1. Four positioning grooves 3 are provided on the side wall of the temperature measuring bracket 1, and each thermocouple 2 is arranged in a corresponding positioning groove 3. Every two thermocouples 2 form a group, and the temperature measuring ends 21 of the two thermocouples 2 in each group are arranged at the same height. The temperature measuring bracket 1 is inserted into the hollow shell 5 so that the temperature measuring end 21 of the thermocouple 2 is positioned in the shell 5. The temperature measuring bracket 1 can easily complete the installation of multiple thermocouples 2 in a small space and accurately install them to the specified position.

[0045] Two elastic members 4 are provided on the temperature measuring bracket 1. The elastic members 4 are inserted into the temperature measuring bracket 1. Both ends of the elastic members 4 are respectively connected to the temperature measuring ends 21 of a group of thermocouples 2, which can push the two temperature measuring ends 21 to extend outward to ensure that the temperature measuring ends 21 maintain contact with the inner wall of the shell 5.

[0046] Furthermore, nano fillers are filled between the heating rod housing 5 and the temperature measuring bracket 1 to perform filling and sealing, thereby ensuring that the heating rod housing 5 works normally under high temperature and high pressure without deformation and leakage.

[0047] The radial cross section of the temperature measuring bracket 1 is cut at the position of the temperature measuring end 21 to form a temperature measuring surface. The contact point between the temperature measuring end 21 and the shell 5 is the temperature measuring point. Therefore, the heating rod of this embodiment has two temperature measuring surfaces, and each temperature measuring surface has two temperature measuring points. The cross section of the first temperature measuring surface is as follows: Figure 6 As shown, the cross section of the second temperature measuring surface is Figure 7 The connecting line of two temperature measuring points on the same temperature measuring surface is the temperature measuring line, which intersects with the axis of the temperature measuring bracket 1. The two temperature measuring points on the first temperature measuring surface can measure the temperature of the two opposite inner walls of the heating rod shell 5, and the two temperature measuring points on the second temperature measuring surface can measure the temperature of the other two opposite inner walls of the heating rod shell 5.

[0048] Therefore, the heating rod of this embodiment can achieve precise temperature measurement at 4 points in 2 cross sections. In other embodiments, the number of positioning grooves 3 on the thermocouples 2 and the temperature measuring bracket 1 can be increased or the number of temperature measuring brackets 1 can be increased to achieve precise temperature measurement at more cross sections and more points, such as 8 points in 4 cross sections, 12 points in 6 cross sections, etc.

[0049] The heating rod of the above embodiment has a temperature measuring device designed for the structure of its shell 5. The thermocouple 2 is fixed by a temperature measuring bracket 1, which can realize multi-section and multi-point accurate temperature measurement in the small-sized and slender heating rod shell 5; the elastic member 4 can realize accurate temperature measurement without damaging the inner wall of the shell 5; the gap between the temperature measuring bracket 1 and the shell 5 is filled and sealed, which can ensure that the heating rod works normally under high temperature and high pressure, and the shell 5 will not deform or leak.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heating rod temperature measuring device, characterized in that: The invention comprises a temperature measuring support (1) and a plurality of thermocouples (2) fixed on the temperature measuring support (1), wherein the temperature measuring support (1) is suitable for being inserted into a shell (5) of a heating rod, wherein the thermocouple (2) comprises a temperature measuring end (21), a partial radial cross section of the temperature measuring support (1) constitutes a temperature measuring surface, the temperature measuring end (21) is located on the temperature measuring surface and forms a temperature measuring point at a contact point with the shell (5), and each of the temperature measuring surfaces comprises at least one temperature measuring point; The temperature measuring support (1) comprises at least two temperature measuring surfaces, each of which comprises two temperature measuring points; A connecting line of two temperature measuring points on the same temperature measuring surface is a temperature measuring line, and the temperature measuring line intersects with the axis of the temperature measuring bracket (1); The angle between two adjacent temperature measuring lines on the temperature measuring surface arranged along the axial direction of the temperature measuring support (1) satisfies the following relationship: R = 360° × L / M; Wherein, R is the angle between two temperature measuring lines on adjacent temperature measuring surfaces, L is the distance between adjacent temperature measuring surfaces, and M is the pitch of the shell (5) of the heating rod; A nano filler is provided between the temperature measuring bracket (1) and the shell (5).

2. The heating rod temperature measuring device according to claim 1, characterized in that: A plurality of positioning grooves (3) are provided on the side wall of the temperature measuring bracket (1), and each of the thermocouples (2) is arranged in a corresponding positioning groove (3).

3. The heating rod temperature measuring device according to claim 2, characterized in that: The temperature measuring bracket (1) is provided with a plurality of elastic members (4), and the elastic members (4) are suitable for pushing the corresponding temperature measuring end (21) out of the positioning groove (3) so that the temperature measuring end (21) is in contact with the shell (5).

4. The heating rod temperature measuring device according to claim 3, characterized in that: The elastic member (4) is a spring, a leaf spring or a rubber rod.

5. The heating rod temperature measuring device according to claim 3, characterized in that: The number of the positioning grooves (3) is 2-6, the temperature measuring ends (21) of the two thermocouples (2) arranged opposite to each other are located on the same temperature measuring surface, and the two ends of the elastic member (4) respectively abut against the two temperature measuring ends (21) on one temperature measuring surface.

6. A heating rod, characterized in that: It comprises a heating rod temperature measuring device as described in any one of claims 1-5.

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