An auxiliary device used during the calibration process of a thermocouple calibration furnace

Abstract

The present invention discloses an auxiliary device used in the verification process of a thermocouple verification furnace, comprising: a fixing mechanism and a limiting mechanism which are oppositely arranged. The fixing mechanism is used to fix the thermocouple bundle to coincide with the axis of the furnace chamber of the thermocouple verification furnace. The limiting mechanism is used to limit the measuring end of the thermocouple bundle, and enable the thermocouple bundle to extend into the center position of the furnace chamber of the thermocouple verification furnace to measure the temperature of the thermocouple verification furnace. The present invention can ensure that during the entire calibration process, the high-temperature thermocouple bundle will not touch the inner wall of the verification furnace, avoiding the collapse of the furnace chamber of the verification furnace caused by high-temperature burning, and further preventing unsafe accidents such as fire and explosion.

Description

Technical Field

[0001] The present invention belongs to the field around a thermocouple calibration furnace, and particularly relates to an auxiliary device used during the calibration process of a thermocouple calibration furnace. Background Art

[0002] Platinum-rhodium 10 - Platinum thermocouple calibration device, the measurement range of the standard supporting equipment calibration furnace is 300 - 1200 °C. According to the requirements of JJG1013 - 2013 "Regulations for the Verification of Precious Metal Thermocouples", during the calibration process, the thermocouple bundle in which the thermocouple under test and the standard thermocouple are bundled should be placed at the center position of the furnace chamber, that is, in a suspended state, to ensure that the measurement end of the thermocouple can accurately collect the real-time temperature in the furnace chamber, thereby ensuring the accuracy and reliability of the calibration result data. However, this set of devices has defects. In actual operation, it is very difficult for the thermocouple bundle with an operating temperature generally of 1200 °C to be at the center position of the furnace chamber, and it often touches the inner wall of the furnace chamber. After being burned by high temperature for a long time, the temperature field stability of the calibration furnace equipment is also greatly affected, and in severe cases, it may even burn out the thermocouple calibration furnace, resulting in the occurrence of unsafe accidents. In addition, the accuracy of the quantity transfer result data cannot be guaranteed.

[0003] Currently used thermocouple calibration furnace equipment in China generally has the above problems. During the calibration process, to varying degrees, there will be a phenomenon that the high-temperature thermocouple bundle adheres to the furnace cavity and burns the thermocouple calibration furnace. Over time, it will affect the metrological performance of the calibration furnace. Summary of the Invention

[0004] The purpose of the present invention is to provide an auxiliary device used during the calibration process of a thermocouple calibration furnace, which can ensure that the high-temperature thermocouple bundle never touches the inner wall of the calibration furnace during the calibration process, and avoid affecting the temperature field stability of the calibration furnace and the service life of the calibration furnace equipment.

[0005] The present invention adopts the following technical solutions: An auxiliary device used during the calibration process of a thermocouple calibration furnace, comprising: a fixed mechanism and a limiting mechanism arranged oppositely. The fixed mechanism is used to fix the thermocouple bundle to coincide with the axis of the furnace chamber of the thermocouple calibration furnace, and the limiting mechanism is used to limit the measurement end of the thermocouple bundle, and make the thermocouple bundle extend into the center position of the furnace chamber of the thermocouple calibration furnace and measure the temperature of the thermocouple calibration furnace;

[0006] The fixed mechanism includes:

[0007] A first fixing plate, horizontally arranged, located on the right side of the thermocouple calibration furnace,

[0008] A first support rod, vertically arranged, the lower end of which is fixedly connected to the upper side of the first fixing plate,

[0009] The thermocouple bundle fixing cylinder is horizontally arranged, and its lower side wall is fixedly connected to the upper end of the first support rod. Its left end is used to extend into the right edge of the furnace chamber of the thermocouple calibration furnace. Its inner cavity is used for the thermocouple bundle to pass through from right to left and extend into the furnace chamber of the thermocouple calibration furnace, thereby preventing the thermocouple bundle from touching the inner wall of the furnace chamber of the thermocouple calibration furnace.

[0010] The first positioning plate is vertically arranged on the left side of the first support rod. Its lower end is fixedly connected to the first fixing plate and is used to abut against the right side wall of the thermocouple calibration furnace and limit the length of the thermocouple bundle fixing cylinder extending into the furnace chamber of the thermocouple calibration furnace.

[0011] Furthermore, the limiting mechanism includes:

[0012] The second fixing plate is horizontally arranged on the left side of the thermocouple calibration furnace.

[0013] The second support rod is vertically arranged, and its lower end is fixedly connected to the upper side of the second fixing plate.

[0014] The thermocouple bundle limiting cylinder is horizontally arranged, and its lower side wall is fixedly connected to the upper end of the second support rod. Its right end is used to extend into the left edge of the furnace chamber of the thermocouple calibration furnace.

[0015] The limiting movable rod is horizontally arranged and passes through the inner cavity of the thermocouple bundle limiting cylinder. Its right end is used to pass through the thermocouple bundle limiting cylinder, extend from the left side of the furnace chamber of the thermocouple calibration furnace, and make its right end exactly at the center position of the furnace chamber of the thermocouple calibration furnace, for detecting whether the measuring end of the thermocouple bundle reaches the center position of the furnace chamber.

[0016] Furthermore, the limiting mechanism also includes:

[0017] The first support block is vertically arranged on the left side of the second support rod and its lower end is fixedly connected to the upper side of the second fixing plate. Baffles are fixedly connected to the upper edges of each of them, and the baffles cooperate with each other to form a receiving cavity.

[0018] The second support block is vertically arranged inside the receiving cavity. Its lower end is fixedly connected to the top of the first support block. A gathering cavity is formed by a downward depression at the center of its upper side.

[0019] The limiting ball is located at the gathering cavity of the second support block.

[0020] The movable block is located below the limiting movable rod and on the right side of the limiting ball. Its upper side is fixedly connected to the limiting movable rod. Its lower end is used to move leftward immediately after the right end of the limiting movable rod is pushed leftward by the thermocouple bundle, and to push the limiting ball to roll leftward and drop the movable block and enter the receiving cavity. When the limiting ball drops into the receiving cavity, the measuring end of the thermocouple bundle just reaches the center position of the furnace chamber.

[0021] Furthermore, a second positioning plate is fixedly connected to the right side of the second support rod. The second positioning plate is vertically arranged, and its lower end is fixedly connected to the upper side of the second fixed plate, and its left side is fixedly connected to the second support rod. The second positioning plate is used to rest against the left outer wall of the furnace of the thermocouple calibration furnace.

[0022] Furthermore, the limiting mechanism also includes: an extension tube, which is horizontally arranged and coaxially arranged with the thermocouple beam limiting tube, and its left end is integrally connected with the right end of the thermocouple beam limiting tube, and its right end extends to the right and extends into the furnace of the thermocouple calibration furnace. The extension tube is used to support and maintain the horizontal state of the limiting movable rod.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention can ensure that during the entire calibration process, the high-temperature thermocouple bundle will not touch the inner wall of the calibration furnace, thereby preventing the high-temperature burning from causing the furnace to collapse, and further causing unsafe accidents such as fire and explosion;

[0025] 2. The present invention can avoid the influence of the thermocouple bundle on the metrological performance of the calibration furnace, so that the metrological characteristics meet the requirements of the national metrological verification regulations, thereby extending the service life of the calibration furnace equipment, and can also avoid the occurrence of the thermocouple calibration furnace due to the collapse of the calibration furnace hearth, and indirectly cause the misjudgment of the metrological calibration results;

[0026] 3. The present invention can make the fixing mechanism and the limiting mechanism attached to both sides of the thermocouple calibration furnace by setting the first positioning plate and the second positioning plate, so that the thermocouple bundle cannot touch the inner wall of the calibration furnace;

[0027] 4. The present invention provides a limiting ball, so that the limiting movable rod can be moved to the left and then the limiting ball can be pushed. By observing the position of the limiting ball, it can be determined whether the thermocouple bundle reaches the center of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the limiting mechanism of the present invention;

[0031] Figure 4 Detailed schematic diagram of the limiting mechanism of the present invention.

[0032] Wherein: 1. Fixing mechanism; 11. First fixing plate; 12. First support rod; 13. Thermocouple bundle fixing cylinder; 14. First positioning plate; 2. Limiting mechanism; 21. Second fixing plate; 22. Second support rod; 23. Thermocouple bundle limiting cylinder; 24. Limiting movable rod; 25. First support block; 26. Second support block; 27. Limiting ball; 28. Movable block; 29. Second positioning plate; 30. Extension cylinder; 3. Thermocouple verification furnace. Specific implementation manner

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation manners.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more. The "direction" in the present invention is described based on the direction of the present invention when it is in the Figure 1 state.

[0035] The present invention discloses an auxiliary device used in the verification process of a thermocouple verification furnace. As Figure 1 shown, it includes: a fixing mechanism 1 and a limiting mechanism 2 arranged oppositely. The fixing mechanism 1 is used to fix the coincidence of the thermocouple bundle and the furnace axis of the thermocouple verification furnace 3, and the limiting mechanism 2 is used to limit the measurement end of the thermocouple bundle and make the thermocouple bundle extend into the center position of the furnace of the thermocouple verification furnace 3 and measure the temperature of the thermocouple verification furnace 3.

[0036] As Figure 2 shown, the fixing mechanism 1 includes: a first fixing plate 11, a first support rod 12, a thermocouple bundle fixing cylinder 13, and a first positioning plate 14.

[0037] The first fixing plate 11 is arranged horizontally, the first fixing plate 11 is located on the right side of the thermocouple verification furnace 3, the first support rod 12 is arranged vertically, and the lower end of the first support rod 12 is fixedly connected to the upper side of the first fixing plate 11.

[0038] The thermocouple bundle fixing cylinder 13 is horizontally arranged. The lower side wall of the thermocouple bundle fixing cylinder 13 is fixedly connected to the upper end of the first support rod 12. The left end of the thermocouple bundle fixing cylinder 13 is used to extend into the right side edge of the furnace chamber of the thermocouple verification furnace 3. The inner cavity of the thermocouple bundle fixing cylinder 13 is for the thermocouple bundle to pass through from right to left and extend into the furnace chamber of the thermocouple verification furnace 3, thereby preventing the thermocouple bundle from touching the inner wall of the furnace chamber of the thermocouple verification furnace 3.

[0039] The first positioning plate 14 is vertically arranged. The first positioning plate 14 is located on the left side of the first support rod 12. The lower end of the first positioning plate 14 is fixedly connected to the first fixing plate 11. The first positioning plate 14 is used to abut against the right side wall of the thermocouple verification furnace 3 and limit the length of the thermocouple bundle fixing cylinder 13 extending into the furnace chamber of the thermocouple verification furnace 3.

[0040] The limiting mechanism 2 includes: a second fixing plate 21, a second support rod 22, a thermocouple bundle limiting cylinder 23, and a limiting movable rod 24.

[0041] The second fixing plate 21 is horizontally arranged. The second fixing plate 21 is located on the left side of the thermocouple verification furnace 3. The second support rod 22 is vertically arranged. The lower end of the second support rod 22 is fixedly connected to the upper side of the second fixing plate 21.

[0042] The thermocouple bundle limiting cylinder 23 is horizontally arranged. The lower side wall of the thermocouple bundle limiting cylinder 23 is fixedly connected to the upper end of the second support rod 22. The right end of the thermocouple bundle limiting cylinder 23 is used to extend into the left side edge of the furnace chamber of the thermocouple verification furnace 3.

[0043] The limiting movable rod 24 is horizontally arranged. The limiting movable rod 24 passes through the inner cavity of the thermocouple bundle limiting cylinder 23. The right end of the limiting movable rod 24 is used to pass through the thermocouple bundle limiting cylinder 23 and extend from the left side of the furnace chamber of the thermocouple verification furnace 3 so that the right end thereof is exactly at the center position of the furnace chamber of the thermocouple verification furnace 3. The limiting movable rod 24 is used to detect whether the measuring end of the thermocouple bundle reaches the center position of the furnace chamber.

[0044] As Figure 3 and Figure 4 shown, the limiting mechanism 2 further includes: a first support block 25, a second support block 26, a limiting ball 27, and a movable block 28.

[0045] The first support block 25 is vertically arranged. The first support block 25 is located on the left side of the second support rod 22 and its lower end is fixedly connected to the upper side of the second fixing plate 21. Baffles are fixedly connected to the upper side edges thereof, and the baffles cooperate with each other to form a receiving cavity.

[0046] The second support block 26 is vertically arranged and is located inside the accommodation cavity. The lower end of the second support block 26 is fixedly connected to the top of the first support block 25. A gathering cavity is formed by a downward depression at the center of the upper side of the second support block 26.

[0047] The limiting ball 27 is located at the gathering cavity of the second support block 26. The movable block 28 is located below the limiting movable rod 24 and on the right side of the limiting ball 27. The upper side of the movable block 28 is fixedly connected to the limiting movable rod 24. The lower end of the movable block 28 is used to move leftward immediately after the right end of the limiting movable rod 24 is pushed leftward by the thermocouple bundle, and it also pushes the limiting ball 27 to roll leftward and drop off the movable block 28 and enter the accommodation cavity. When the limiting ball 27 drops into the accommodation cavity, the measuring end of the thermocouple bundle just reaches the central position of the furnace chamber.

[0048] A second positioning plate 29 is fixedly connected to the right side of the second support rod 22. The second positioning plate 29 is vertically arranged, and its lower end is fixedly connected to the upper side of the second fixing plate 21, and its left side is fixedly connected to the second support rod 22. The second positioning plate 29 is used to abut against the left outer wall of the furnace chamber of the thermocouple calibration furnace 3.

[0049] The limiting mechanism 2 further includes: an extension cylinder 30. The extension cylinder 30 is horizontally arranged and is coaxially arranged with the thermocouple bundle limiting cylinder 23. The left end of the extension cylinder 30 is integrally connected to the right end of the thermocouple bundle limiting cylinder 23. The right end of the extension cylinder 30 extends rightward and extends into the furnace chamber of the thermocouple calibration furnace 3. The extension cylinder 30 is used to support and maintain the horizontal state of the limiting movable rod 24.

[0050] During the calibration process of the present invention, first, the fixing mechanism 1 and the limiting mechanism 2 are respectively attached to the right side and the left side of the thermocouple calibration furnace 3, so that the first positioning plate 14 of the fixing mechanism 1 is attached to the right side of the thermocouple calibration furnace 3, and the second positioning plate 29 of the limiting mechanism 2 is attached to the left side of the thermocouple calibration furnace 3. Then, the thermocouple to be calibrated and the standard thermocouple are bundled into a bundle and inserted into the thermocouple bundle fixing cylinder 13 of the fixing mechanism 1 and continuously moved leftward until it abuts against the right end of the limiting movable rod 24 and forces the limiting movable rod 24 to move leftward, so that the movable block 28 toggles the limiting ball 27 to roll leftward and drop into the accommodation cavity. At this time, it is proved that the measuring end of the thermocouple bundle just reaches the central position of the furnace chamber. The present invention can prevent the thermocouple bundle from touching the furnace chamber.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary device used during the verification process of a thermocouple verification furnace, characterized in that, Comprising: A relatively arranged fixing mechanism (1) and a limiting mechanism (2), wherein the fixing mechanism (1) is used to fix the coincidence of the thermocouple bundle and the axis of the furnace chamber of the thermocouple verification furnace (3), and the limiting mechanism (2) is used to limit the measuring end of the thermocouple bundle, and enable the thermocouple bundle to extend into the center position of the furnace chamber of the thermocouple verification furnace (3) and measure the temperature of the thermocouple verification furnace (3); The fixing mechanism (1) includes: A first fixing plate (11), horizontally arranged, located on the right side of the thermocouple verification furnace (3); A first support rod (12), vertically arranged, the lower end of which is fixedly connected to the upper side of the first fixing plate (11); A thermocouple bundle fixing cylinder (13), horizontally arranged, the lower side wall of which is fixedly connected to the upper end of the first support rod (12), the left end of which is used to extend into the right side edge of the furnace chamber of the thermocouple verification furnace (3), and its inner cavity is used for the thermocouple bundle to pass through from right to left and extend into the furnace chamber of the thermocouple verification furnace (3), thereby preventing the thermocouple bundle from touching the inner wall of the furnace chamber of the thermocouple verification furnace (3); A first positioning plate (14), vertically arranged, located on the left side of the first support rod (12), the lower end of which is fixedly connected to the first fixing plate (11), and is used to abut against the right side wall of the thermocouple verification furnace (3) and limit the length of the thermocouple bundle fixing cylinder (13) extending into the furnace chamber of the thermocouple verification furnace (3); The limiting mechanism (2) includes: A second fixing plate (21), horizontally arranged, located on the left side of the thermocouple verification furnace (3); A second support rod (22), vertically arranged, the lower end of which is fixedly connected to the upper side of the second fixing plate (21); A thermocouple bundle limiting cylinder (23), horizontally arranged, the lower side wall of which is fixedly connected to the upper end of the second support rod (22), the right end of which is used to extend into the left side edge of the furnace chamber of the thermocouple verification furnace (3); A limiting movable rod (24), horizontally arranged, passing through the inner cavity of the thermocouple bundle limiting cylinder (23), the right end of which is used to pass through the thermocouple bundle limiting cylinder (23) and extend from the left side of the furnace chamber of the thermocouple verification furnace (3) so that the right end thereof is exactly at the center position of the furnace chamber of the thermocouple verification furnace (3), and is used to detect whether the measuring end of the thermocouple bundle reaches the center position of the furnace chamber; The limiting mechanism (2) further includes: A first support block (25), vertically arranged, located on the left side of the second support rod (22), and the lower end of which is fixedly connected to the upper side of the second fixing plate (21), and baffles are fixedly connected to the upper side edges thereof, and the baffles cooperate with each other to form a receiving cavity; A second support block (26), vertically arranged, located in the receiving cavity, the lower end of which is fixedly connected to the top of the first support block (25), and a gathering cavity is formed by downward depression at the center of the upper side thereof; A limiting ball (27), located at the gathering cavity of the second support block (26); The movable block (28) is located on the lower side of the limit movable rod (24) and to the right of the limit ball (27). Its upper side is fixedly connected to the limit movable rod (24). Its lower end is configured to move leftward immediately after the right end of the limit movable rod (24) is pushed out leftward by the thermocouple bundle, and to push the limit ball (27) to roll leftward and drop off the movable block (28) and into the accommodation cavity. When the limit ball (27) drops into the accommodation cavity, the measuring end of the thermocouple bundle exactly reaches the central position of the furnace chamber.

2. An auxiliary device used during the calibration process of a thermocouple calibration furnace according to claim 1, characterized in that, A second positioning plate (29) is fixedly connected to the right side of the second support rod (22). The second positioning plate (29) is vertically arranged, and its lower end is fixedly connected to the upper side of the second fixing plate (21), and its left side is fixedly connected to the second support rod (22). The second positioning plate (29) is used to abut against the left outer wall of the furnace chamber of the thermocouple calibration furnace (3).

3. An auxiliary device used during the calibration process of a thermocouple calibration furnace according to claim 2, characterized in that, The limiting mechanism (2) further includes: an extension cylinder (30). The extension cylinder (30) is horizontally arranged and coaxially arranged with the thermocouple bundle limiting cylinder (23). Its left end is integrally connected to the right end of the thermocouple bundle limiting cylinder (23), and its right end extends rightward and extends into the furnace chamber of the thermocouple calibration furnace (3). The extension cylinder (30) is used to support and maintain the horizontal state of the limit movable rod (24).

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