Explosion-proof multi-point armored thermocouple with high precision

Abstract

A high-precision explosion-proof multi-point armored thermocouple comprises a thermocouple wire, an inner sleeve, an insulating material, an outer sleeve, an installation shell fixedly installed on the outer sleeve, an explosion-proof shell installed on the installation shell, and a first support and a second support which are fixedly installed in the installation shell, the rotating frame is rotationally installed on the first support, the rolling wheel is rotationally installed on the second support, the outer sleeve is coaxially sleeved with the installing cylinder, the sliding cylinder and the threaded cylinder are coaxially installed on the installing cylinder in a sliding mode and fixedly connected with each other, and the limiting block is fixedly installed on the installing cylinder and intermittently clamps the threaded cylinder. The installation connecting plate is rotationally installed on the installation cylinder and elastically connected with the threaded cylinder, and the buckle is installed on the sliding cylinder and intermittently clamps the installation connecting plate. The thermocouple wire is coiled in the mounting shell; the measuring end can move freely, two modes of threaded installation and fixed plate installation are provided, and positioning of the installation position of a common sheathed thermocouple can be assisted.

Description

Technical Field

[0001] The invention relates to the technical field of temperature sensors, in particular to a high-precision explosion-proof multi-point armored thermocouple. Background Art

[0002] Temperature measurement is a critical component of industrial production and many other fields, crucial for controlling production processes, ensuring product quality, and ensuring the safe operation of equipment. Armored thermocouples, as common temperature measurement sensors, are widely used in various production processes to measure the temperatures of various fluids, steam, gaseous media, and solid surfaces.

[0003] In terms of installation methods, traditional armored thermocouples usually only adopt a single fixing form, such as fixed thread installation or fixed plate installation, which lacks flexibility. These two single installation methods are difficult to adapt to the diverse installation needs of industrial sites.

[0004] In practical use, traditional armored thermocouples often require bending the thermocouple wire to move the measuring end, which presents numerous limitations. Because the measuring end is fixed, it must be positioned in a specific location during on-site installation and use to meet measurement requirements. However, in some industrial sites with limited space and complex layouts, finding a suitable installation location for the measuring end can be difficult. This necessitates multiple bending of the thermocouple wire, multiple selections of installation locations, and repeated installation and removal to determine the final installation position. This not only increases installation difficulty and reduces measurement efficiency due to repeated installation, but also increases the risk to testers. Furthermore, in scenarios where temperature measurements at different locations are required, using multiple traditional armored thermocouples is not only costly but also cumbersome to install and maintain. If the measuring tip of the armored thermocouple could be made movable, the same thermocouple could be used flexibly at different measurement points by moving the tip, significantly improving measurement efficiency and reducing costs. In summary, the development of an armored thermocouple with a movable measuring end and two optional installation methods: threaded mounting and fixed plate mounting is of great significance. Its diverse installation methods can adapt to equipment of different specifications and complex environments. The free movement of the measuring end gives it flexibility in use, which not only enables this thermocouple to solve the inherent problems of traditional thermocouples but also can be used to determine the installation position of ordinary armored thermocouples. In practical applications, by moving the measuring end and selecting the appropriate installation method, temperature measurement tests can be performed at different locations, thereby finding the most suitable location for ordinary armored thermocouple installation, avoiding measurement errors and equipment loss caused by improper installation location, and providing more efficient, accurate, and reliable technical support for temperature measurement in industrial production and scientific research. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a high-precision explosion-proof multi-point armored thermocouple, the technical solution used is: A high-precision explosion-proof multi-point armored thermocouple comprises a thermocouple wire, an inner sleeve, an insulating material, and an outer sleeve arranged in sequence from the inside out; a mounting housing fixedly mounted on the outer sleeve; an explosion-proof housing mounted on the mounting housing; a first bracket and a second bracket fixedly mounted within the mounting housing; a rotating frame rotatably mounted on the first bracket; and a roller rotatably mounted on the second bracket for supporting the thermocouple wire and driving the thermocouple wire to move. An annular placement groove for the thermocouple wire is provided in the installation shell; a clamping block is fixedly installed on the rotating frame, and a plurality of steering blocks are fixedly installed in the installation shell; the thermocouple wire bypasses the steering block and the clamping block and is coiled in the annular placement groove in the installation shell.

[0006] Furthermore, it also includes a motor 1 fixedly mounted on the bracket 1, and an input gear coaxially fixedly mounted on the output end of the motor 1; an output internal gear ring meshing with the input gear is fixedly mounted on the rotating frame.

[0007] Furthermore, it also includes a second motor fixedly mounted on the second bracket for driving the roller to rotate.

[0008] Furthermore, it also includes a mounting tube coaxially sleeved on the outer sleeve, a sliding tube and a threaded tube coaxially slidably mounted on the mounting tube and fixedly connected to each other, a limit block fixedly mounted on the mounting tube and intermittently clamping the threaded tube, a mounting connecting plate rotatably mounted on the mounting tube and elastically connected to the threaded tube, and a buckle mounted on the sliding tube and intermittently clamping the mounting connecting plate.

[0009] Furthermore, it also includes an elastic connecting rod arranged between the installation connecting plate and the threaded barrel; two ends of the elastic connecting rod are rotatably mounted on the installation connecting plate and the threaded barrel respectively.

[0010] Furthermore, a plurality of mounting holes are provided on the mounting connection plate.

[0011] Since the present invention adopts the above technical solution, compared with the prior art, the present invention has the following advantages: 1. Movable measuring tip enhances measurement adaptability: The freely movable measuring tip allows the same armored thermocouple to be used flexibly at different measurement points. In complex industrial sites, simply adjusting the measuring tip to the appropriate position ensures stable measurement system operation. This also meets the need for temperature measurement at various locations, eliminating the need for multiple thermocouples, effectively reducing costs and improving measurement efficiency.

[0012] 2. Significantly improved installation flexibility: The present invention provides two installation methods: threaded installation and fixed plate installation. Compared with the traditional single installation method, it can adapt to equipment of different specifications and complex installation environments.

[0013] 3. Accurately locate the installation location of standard armored thermocouples: With its diverse installation methods and movable measuring tip, this device can perform temperature measurement tests at various locations in practical applications. By moving the measuring tip and selecting the appropriate installation method to obtain measurement data, the optimal installation location for standard armored thermocouples can be accurately determined, effectively avoiding measurement errors and equipment loss caused by improper installation. This provides a scientific basis for subsequent installation of standard armored thermocouples, ensuring temperature measurement accuracy and extending equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention when the mounting connecting plate is used for installation.

[0015] Figure 2 This is a schematic diagram of the assembly structure of the mounting cylinder, the sliding cylinder, the threaded cylinder, the mounting connecting plate and the elastic connecting rod when the mounting connecting plate is used for installation in the present invention.

[0016] Figure 3 This is a schematic diagram of the overall structure of the present invention when using a threaded barrel for installation.

[0017] Figure 4 This is a schematic diagram of the assembly structure of the installation cylinder, sliding cylinder, threaded cylinder, installation connecting plate and elastic connecting rod when the threaded cylinder is used for installation in the present invention.

[0018] Figure 5 The figure is a schematic diagram of the assembly structure of the thermocouple wire, inner sleeve, insulating material and outer sleeve of the present invention.

[0019] Figure 6 It is a top view of the assembly structure of the thermocouple wire, mounting housing, bracket 1, rotating frame and bracket 2 of the present invention.

[0020] Figure 7 This is a side view of the assembly structure of the thermocouple wire, mounting housing, bracket 1, rotating frame and bracket 2 of the present invention.

[0021] Figure 8 This is a schematic diagram of the assembly structure of the thermocouple wire, bracket 1, rotating bracket and bracket 2 of the present invention.

[0022] Figure 9 The figure is a schematic diagram of the assembly structure of the thermocouple wire, rotating frame, motor 1 and input gear of the present invention.

[0023] Figure 10 This is a schematic diagram of the assembly structure of the thermocouple wire, bracket 2, roller and motor 2 of the present invention.

[0024] Figure Number: 1-thermocouple wire; 2-inner sleeve; 3-insulating material; 4-outer sleeve; 5-mounting shell; 501-steering block; 6-bracket 1; 7-rotating frame; 701-block; 702-output inner gear ring; 8-motor 1; 9-input gear; 10-bracket 2; 11-roller; 12-motor 2; 13-mounting cylinder; 14-sliding cylinder; 15-threaded cylinder; 16-clip; 17-limiting block; 18-mounting connecting plate; 19-elastic connecting rod; 20-explosion-proof shell. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be further specifically described below through examples and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be noted that the terms "up", "down", "in", "out", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention 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. Therefore, they should not be understood as limiting the present invention.

[0027] Example: like Figure 1 、 Figure 3 and Figure 5 As shown, this embodiment provides a high-precision explosion-proof multi-point armored thermocouple, including a thermocouple wire 1, an inner sleeve 2, an insulating material 3, an outer sleeve 4, a mounting shell 5 and an explosion-proof shell 20; the thermocouple wire 1, the inner sleeve 2, the insulating material 3 and the outer sleeve 4 are arranged in sequence from the inside to the outside, the thermocouple wire 1 is wrapped with an outer skin, the outer skin is slidably installed in the inner sleeve 2, and the inner sleeve 2 and the outer sleeve 4 are filled with insulating material 3; the mounting shell 5 is fixedly installed at the top of the outer sleeve 4, and the explosion-proof shell 20 is threadedly installed on the mounting shell 5.

[0028] like Figures 6-10 As shown, the thermocouple of this embodiment further includes a bracket 1 6, a rotating frame 7, a motor 1 8, an input gear 9, a bracket 2 10, a roller 11 and a motor 2 12; the bracket 1 6 and the bracket 2 10 are both fixedly mounted in the mounting housing 5; the rotating frame 7 is rotatably mounted on the bracket 1 6; the motor 1 8 is fixedly mounted on the bracket 1 6, the input gear 9 is coaxially fixedly mounted on the output end of the motor 1 8, and the rotating frame 7 is mounted with an output internal gear ring 702, which meshes with the input gear 9; The reference end of the thermocouple wire 1 enters the mounting housing 5 and is coiled on the mounting housing 5. The mounting housing 5 is provided with an annular placement groove for the thermocouple wire 1. Specifically, a clamping block 701 is fixedly installed on the rotating frame 7, and a plurality of steering blocks 501 are fixedly installed in the mounting housing 5. Figure 6 and Figure 8 As shown, the thermocouple wire 1 passes through the steering block 501 and the clamping block 701 and is coiled in the annular placement groove in the mounting housing 5, with the reference end extending out of the annular placement groove; There are several rollers 11, all of which are rotatably mounted on the second bracket 10, and are used to support the thermocouple wire 1 and drive the thermocouple wire 1 to move. The second motor 12 is used to drive one of the rollers 11 to rotate. In a specific implementation of this embodiment, there are three rollers 11, two of which are located on both sides of the thermocouple wire 1 to limit the thermocouple wire 1, and the third is located further above to make the thermocouple wire 1 turn. The second motor 12 is fixedly mounted on the second bracket 10, and the output end is coaxially fixedly connected to one of the rollers 11.

[0029] like Figures 1-4 As shown, the thermocouple of this embodiment further includes a mounting cylinder 13, a sliding cylinder 14, a threaded cylinder 15, a buckle 15, a limit block 17, a mounting connecting plate 18 and an elastic connecting rod 19; the mounting cylinder 13 is coaxially sleeved on the outer sleeve 4; the sliding cylinder 14 and the threaded cylinder 15 are both coaxially slidably mounted on the mounting cylinder 13, and the sliding cylinder 14 and the threaded cylinder 15 are fixedly connected; a plurality of limit blocks 17 are fixedly mounted on the mounting cylinder 13, and the limit blocks 17 intermittently clamp the threaded cylinder 15; A plurality of mounting connecting plates 18 are provided, evenly distributed along the circumference on the periphery of the mounting cylinder 13; the bottom end of each mounting connecting plate 18 is rotatably mounted on the mounting cylinder 13, and the top end is elastically connected to the threaded cylinder 15 via an elastic connecting rod 19; in a specific implementation of this embodiment, the elastic connecting rod 19 is a compression spring rod, and each mounting connecting plate 18 is provided with two elastic connecting rods 19, one end of the two elastic connecting rods 19 is rotatably mounted on the corresponding mounting connecting plate 18, and the other end is fixedly mounted on the same connecting rod, and the rod body of the connecting rod is rotatably mounted on the threaded cylinder 15; Each mounting connecting plate 18 corresponds to a buckle 16 mounted on the sliding cylinder 14, and the buckle 16 is made of spring material; when the mounting connecting plate 18 is folded up, the buckle 16 can clamp the top of the mounting connecting plate 18; Each mounting connecting plate 18 is provided with a plurality of mounting holes.

[0030] It should be noted here that an integrated signal processing circuit can also be set in the mounting housing 5 of this embodiment. The integrated signal processing circuit has built-in signal amplification, linearization processing, and temperature compensation circuits (existing technology, which will not be repeated here), which improves measurement accuracy and stability, directly outputs digital signals, and is convenient for connection with intelligent systems.

[0031] The explosion-proof principle of the thermocouple in this embodiment is mainly based on the design concept of gap flameproof (also known as flameproof enclosure). Its core is to isolate potential explosion sources through physical structure to prevent the internal explosion energy from being transferred to the external flammable and explosive environment. It is specifically manifested in the following aspects: High-strength housing: The explosion-proof housing 20, the mounting housing 5 and other key components are made of high-strength materials (such as aluminum alloy, stainless steel), and have sufficient mechanical strength and pressure resistance to withstand the pressure generated by the internal explosion without breaking, thereby limiting the explosion to the shell; Sealed structure: All components that may generate sparks, arcs or dangerous temperatures are sealed in the explosion-proof housing 20 and the mounting housing 5. Moisture-proof and high-temperature resistant materials such as rubber sealing rings are used to ensure the airtightness of the cavity to prevent external explosive gas from penetrating or internal energy from leaking.

[0032] The working principle of this embodiment is as follows: Adjusting the position of the measuring end of the thermocouple wire 1: Start the motor 1 8 and the motor 2 12. The motor 2 12 drives the roller 11 to rotate, driving the thermocouple wire 1 to move. The motor 1 8 drives the input gear 9 to rotate. The input gear 9 drives the output inner gear ring 702 to rotate, thereby driving the rotating frame 7 to rotate, so that the measuring end of the thermocouple wire 1 extends or retracts, achieving the effect of adjusting the position of the measuring end of the thermocouple wire 1. Choose different installation methods: When choosing threaded installation, push the sliding cylinder 14 downward (taking the schematic direction in the attached figure as an example) to drive the threaded cylinder 15 downward, and retract the installation connecting plate 18. The elastic connecting rod 19 is compressed, and the top of the installation connecting plate 18 is clamped by the buckle 16. Finally, the threaded cylinder 15 is threadedly installed in the actual installation position. When choosing the installation method of the installation connecting plate 18, push the sliding cylinder 14 upward (taking the schematic direction in the attached figure as an example) to drive the threaded cylinder 15 upward. The buckle 16 moves upward and disengages from the installation connecting plate 18. The installation connecting plate 18 rotates under the rebound action of the elastic connecting rod 19. When the threaded cylinder 15 is clamped by the limit block 17, the installation connecting plate 18 rotates to a horizontal state. At this time, the installation connecting plate 18 can be fixed in the actual installation position by bolts, screws or pins. Accurately locate the installation position of the ordinary armored thermocouple: According to the actual working conditions, select the installation method of threaded installation or installation of the connecting plate 18, and install the armored thermocouple of this embodiment; then start motor 1 8 and motor 2 12, move the measuring end of the thermocouple wire 1, and perform temperature measurement tests at different positions to find the most suitable position for the installation of the ordinary armored thermocouple, thereby avoiding measurement errors and equipment losses caused by improper installation positions.

Claims

1. A high-precision explosion-proof multi-point armored thermocouple, characterized in that: The device comprises a thermocouple wire, an inner sleeve, an insulating material and an outer sleeve arranged in sequence from the inside out, a mounting shell fixedly mounted on the outer sleeve, an explosion-proof shell mounted on the mounting shell, a first bracket and a second bracket fixedly mounted in the mounting shell, a rotating frame rotatably mounted on the first bracket, and a roller rotatably mounted on the second bracket for supporting the thermocouple wire and driving the thermocouple wire to move; An annular placement groove for the thermocouple wire is provided in the installation shell; a clamping block is fixedly installed on the rotating frame, and a plurality of steering blocks are fixedly installed in the installation shell; the thermocouple wire bypasses the steering block and the clamping block and is coiled in the annular placement groove in the installation shell.

2. A high-precision explosion-proof multi-point armored thermocouple according to claim 1, characterized in that: It also includes a motor 1 fixedly mounted on the bracket 1, and an input gear coaxially fixedly mounted on the output end of the motor 1; an output internal gear ring meshing with the input gear is fixedly mounted on the rotating frame.

3. The high-precision explosion-proof multi-point armored thermocouple according to claim 1, characterized in that: It also includes a second motor which is fixedly mounted on the second bracket and is used to drive the roller to rotate.

4. A high-precision explosion-proof multi-point armored thermocouple according to any one of claims 1 to 3, characterized in that: It also includes a mounting tube coaxially sleeved on the outer sleeve, a sliding tube and a threaded tube coaxially slidably mounted on the mounting tube and fixedly connected to each other, a limit block fixedly mounted on the mounting tube and intermittently clamping the threaded tube, a mounting connecting plate rotatably mounted on the mounting tube and elastically connected to the threaded tube, and a buckle mounted on the sliding tube and intermittently clamping the mounting connecting plate.

5. The high-precision explosion-proof multi-point armored thermocouple according to claim 4, characterized in that: It also includes an elastic connecting rod arranged between the installation connecting plate and the threaded barrel; two ends of the elastic connecting rod are rotatably mounted on the installation connecting plate and the threaded barrel respectively.

6. The high-precision explosion-proof multi-point armored thermocouple according to claim 4, characterized in that: The mounting connecting plate is provided with a plurality of mounting holes.

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