Synchronous turnover device for positioning blocks of tubular verification furnace and use method of synchronous turnover device

Abstract

The invention discloses a tubular verification furnace positioning block synchronous turnover device and a using method, and belongs to the technical field of thermal metrology, the tubular verification furnace positioning block synchronous turnover device comprises two furnace mouth positioning blocks, a locking hoop, a rotary positioner and a limiting supporting frame, and each furnace mouth positioning block is provided with a center positioning hole and an eccentric positioning hole; the furnace mouth positioning blocks are installed in temperature metering holes of the tubular verification furnace, the two holes are coaxial, the locking clamps are installed on the furnace mouth positioning blocks, four positioning pins are evenly distributed on the circumference of each locking clamp, the rotary positioner is installed between the positioning pins of the two locking clamps to connect the two furnace mouth positioning blocks into a whole, the limiting supporting frames are installed on the two sides of the tubular verification furnace, and the limiting supporting frames are installed on the two sides of the tubular verification furnace. The top surface and the central position of the furnace mouth of the tubular verification furnace are at the same height, and the rotary positioner is operated to enable the two furnace mouth positioning blocks to synchronously rotate until the rotary positioner falls on the limiting support frame. The positioning blocks can be accurately and synchronously overturned, the dependence on multiple operators is reduced in a mechanical mode, and the operation safety and the working efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal metrology, and relates to a synchronous flipping device and a usage method for the positioning blocks of a tube-type calibration furnace, which are used for the synchronous rotation of the positioning blocks at two furnace openings during the calibration process of the tube-type calibration furnace. Background Art

[0002] A tube-type calibration furnace is a device used for calibrating temperature sensors (such as thermocouples and thermal resistors), and is widely used in industrial process control and laboratory calibration. During the operation of the tube-type calibration furnace, in order to ensure the accuracy and consistency of temperature measurement, it is necessary to regularly calibrate the temperature field inside the furnace. When measuring the radial temperature of a multi-stage temperature-controlled calibration furnace and a base-metal thermocouple calibration furnace without a temperature equalizing block, it is required that the calibration equipment (including the standard thermocouple and the positioning tube) can rotate 90° clockwise and counterclockwise respectively to complete the accurate measurement. Due to the operation in a high-temperature environment, the mechanical properties of the standard thermocouple (including the moving standard couple and the fixed standard couple) and the positioning tube may decline. In the traditional operation process, usually two people are required to operate the front and rear furnace-opening positioning blocks respectively to achieve synchronous rotation, so as to avoid damage to the thermocouple or other test equipment caused by asynchronous operation. However, manual operation is likely to cause asynchronous flipping of the positioning blocks, resulting in a decrease in calibration accuracy, an increase in operation complexity, and low efficiency. Summary of the Invention

[0003] In order to solve these problems, the present invention provides a synchronous flipping device and a usage method for the positioning blocks of a tube-type calibration furnace, which is a unique mechanical structure that can ensure that all positioning blocks can achieve strict synchronism during the flipping operation. It can realize the precise synchronous flipping of the positioning blocks, reduces the dependence on multiple operators by mechanical means, improves the operation safety and work efficiency. Thus, it ensures the high precision and high stability of the tube-type calibration furnace during the calibration process. Through precise engineering design, the positioning blocks can provide stable support during the calibration process, thereby ensuring the accuracy of the calibration results.

[0004] The present invention adopts the following technical solutions:

[0005] A synchronous flipping device for the positioning blocks of a tube-type calibration furnace includes a furnace-opening positioning block 10, a locking clamp 20, a rotation positioner 30, and a limit support frame 40.

[0006] The described furnace mouth positioning block 10 is a cylinder, and its outer diameter is set according to the inner diameter of the temperature measurement hole on the tubular verification furnace 50. A central positioning hole 101 is made in the center of the furnace mouth positioning block 10 for placing and fixing the standard thermocouple. An eccentric positioning hole 102 arranged axially is made beside the central positioning hole 101 for placing the moving standard thermocouple. The distance between the centers of the two holes is 14 mm. There are two furnace mouth positioning blocks 10 with the same structure, namely the front furnace mouth positioning block and the rear furnace mouth positioning block, which are respectively installed in two coaxially arranged temperature measurement holes on the tubular verification furnace 50, so that the two holes on the front and rear furnace mouth positioning blocks are respectively coaxial. The part of the furnace mouth positioning block 10 exposed from the temperature measurement hole is made with a convex platform along the circumference for limiting the furnace mouth positioning block 10.

[0007] There are two groups of the described locking clamps 20 with the same structure, each including a hoop 201 and a positioning pin 202. The two hoops 201 are respectively locked on the convex platforms of the front and rear furnace mouth positioning blocks. Four positioning pins 202 are evenly arranged on the outer circumference of the hoop 201, so that the included angle between adjacent positioning pins 202 is 90°, and the positioning pin 202 is parallel or perpendicular to the connection line of the centers of the two holes on the furnace mouth positioning block 10. The positioning pin 202 is used to connect the rotary positioner 30.

[0008] The described rotary positioner 30 includes a connecting arm 301, a rotating rod 302 and a handle sleeve 303; there are two connecting arms 301 in total, which are installed in parallel at both ends of the rotating rod 302 and the installation position is adjustable. The two connecting arms 301 are respectively sleeved on the positioning pins 202 in the same direction of the two locking clamps 20. The rotary positioner 30 connects the front and rear furnace mouth positioning blocks into one body to ensure their synchronous movement and stability; the handle sleeve 303 is installed in the middle of the connecting arm 301 for hand-held operation.

[0009] The described limit support frame 40 includes a positioning base 401, a support rod 402 and a limit platform 403. The positioning base 401 is installed on the tubular verification furnace 50 through a positioning groove or a pin. The support rod 402 is installed on the positioning base 401, and a limit platform 403 is installed at its top, so that the limit platform 403 is at the same height as the center position of the furnace mouth of the tubular verification furnace 50. The height of the support rod 402 is adjustable to adapt to different models of tubular verification furnaces; there are two groups of limit support frames 40, which are respectively installed on both sides of the tubular verification furnace 50. Operate the connecting arm 301 to make the front and rear furnace mouth positioning blocks rotate together until the connecting arm 301 lands on the limit platform 403 and stops rotating, so as to ensure that the rotation angle of the furnace mouth positioning block 10 is 90° each time.

[0010] Further, the material of the furnace mouth positioning block 10 is alumina ceramic. Alumina ceramic is renowned for its excellent high-temperature resistance and chemical corrosion resistance, making it an ideal choice for long-term stable operation in high-temperature environments. It can not only withstand continuous high-temperature effects but also has significant resistance to thermal expansion and chemical corrosion, thus ensuring that the performance of the furnace mouth plugging positioning block will not easily degrade due to environmental factors.

[0011] Further, temperature measurement channels 60 are respectively inserted between the two central positioning holes 101 and the two eccentric positioning holes 102. The temperature measurement channels 60 are hollow long tubes, and their outer diameters are matched with the diameters of the central positioning holes 101 and the eccentric positioning holes 102. They are precisely manufactured from alumina-based ceramic materials. This material has excellent high-temperature stability. Its low coefficient of thermal expansion can significantly reduce the risk of thermal deformation, and its dense sintered structure can effectively block the penetration of various corrosive media, thereby ensuring the structural integrity and measurement accuracy of the thermocouple temperature measurement element and extending the service life of the thermocouple temperature measurement element under high-temperature working conditions.

[0012] Further, the material of the rotary positioner 30 is carbon steel, enabling the rotary positioner 30 to have sufficient strength and durability to withstand high-temperature environments and mechanical stresses. The surface of the connecting arm 301 is chrome-plated, which not only increases corrosion resistance but also makes the surface smooth, helping to reduce wear caused by friction.

[0013] Further, the material of the limit support frame 40 is carbon steel, and its surface is chrome-plated.

[0014] A method for using the above-mentioned synchronous flipping device of the tube-type verification furnace positioning block includes the following steps:

[0015] Step 1: Install the two furnace mouth positioning blocks 10 respectively in the two temperature measurement holes of the tube-type verification furnace 50, such that the two eccentric positioning holes 102 are both directly above the central positioning hole 101. Insert the temperature measurement channel 60 between the two central positioning holes 101, place a fixed standard thermocouple in the temperature measurement channel 60, insert another temperature measurement channel 60 between the two eccentric positioning holes 102, and place a moving standard thermocouple in this temperature measurement channel 60.

[0016] Step 2: Lock the two locking clamps 20 respectively on the two furnace mouth positioning blocks 10, such that the positioning pins 202 are parallel or perpendicular to the line connecting the centers of the two holes on the furnace mouth positioning block 10.

[0017] Step 3: Install the two groups of limit support frames 40 on both sides of the tube-type verification furnace 50, adjust the height of the support rods 402, such that the limit platforms 403 are at the same height as the center position of the furnace mouth of the tube-type verification furnace 50.

[0018] Step 4: Adjust the distance between the two connecting arms 301 on the rotary positioner 30, and respectively put them on the topmost positioning pins 202 on the two locking clamps 20 to connect the two furnace mouth positioning blocks 10 into one body.

[0019] Step 5: During the calibration process of the tube type verification furnace, when it is necessary to rotate the furnace mouth positioning block 10, rotate the rotary positioner 30 clockwise or counterclockwise from the topmost position until the rotary rod 302 lands on the limit platform 403, so that the two furnace mouth positioning blocks 10 rotate synchronously by 90°; Remove the rotary positioner 30 and put it on the topmost two positioning pins 202 again to prepare for the next rotation, so as to ensure that the rotation angle of the furnace mouth positioning block 10 is 90° each time.

[0020] Advantages of the present invention:

[0021] 1) High-precision positioning: The present invention can ensure that the sensor can be accurately placed at the predetermined test position under the high-temperature working environment.

[0022] 2) Synchronous flipping mechanism: The present invention can realize the synchronous rotation of the front and rear positioning blocks, avoid the risk brought by asynchronous manual operation, improve the accuracy and efficiency of the temperature sensor calibration, and meet the strict requirements of modern industrial production for quality control.

[0023] 3) Simple operation: The present invention reduces the dependence on multi-person operation and improves the calibration efficiency and safety by simplifying the operation process.

[0024] 4) Good stability and repeatability: The present invention can ensure that the positioning of the sensor is consistent during each calibration process, and has good physical and mechanical properties, can be reused, and has obvious economic benefits and social value. Description of the drawings

[0025] Figure 1 is a schematic diagram of the synchronous flipping device for the positioning block of the tube type verification furnace;

[0026] Figure 2 is a schematic diagram of the furnace mouth positioning block, where (a) is a side view and (b) is a sectional view;

[0027] Figure 3 is a schematic diagram of the locking clamp, where (a) is a front view and (b) is an axonometric view;

[0028] Figure 4 is a schematic diagram of the rotary positioner;

[0029] Figure 5 is a schematic diagram of the limit support frame;

[0030] Figure 6 is a perspective view of the synchronous flipping device for the positioning block of the tube type verification furnace applied to the tube type verification furnace.

[0031] Among them, 10 is the furnace mouth positioning block; 101 is the center positioning hole; 102 is the eccentric positioning hole; 20 is the locking clamp; 201 is the hoop; 202 is the positioning pin; 30 is the rotary positioner; 301 is the connecting arm; 302 is the rotary rod; 303 is the handle sleeve; 40 is the limit support frame; 401 is the positioning base; 402 is the support rod; 403 is the limit table; 50 is the tube type verification furnace; 60 is the temperature measurement hole channel. Specific embodiments

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following will describe the specific embodiments of the present invention in detail according to the technical solutions.

[0033] A synchronous flipping device for a positioning block of a tube type verification furnace includes a furnace mouth positioning block 10, a locking clamp 20, a rotary positioner 30, and a limit support frame 40, as Figure 1 .

[0034] As Figure 2 , the furnace mouth positioning block 10 is a cylinder made of alumina ceramic. Its outer diameter is set according to the inner diameter of the temperature measurement hole on the tube type verification furnace 50. A center positioning hole 101 is made in the center of the furnace mouth positioning block 10 for placing a fixed standard thermocouple. An eccentric positioning hole 102 arranged axially is made beside the center positioning hole 101 for placing a movable standard thermocouple. The distance between the centers of the two holes is 14 mm. Two furnace mouth positioning blocks 10 with the same structure are provided, namely the front furnace mouth positioning block and the rear furnace mouth positioning block, which are respectively installed in two coaxially arranged temperature measurement holes on the tube type verification furnace 50, so that the two holes on the front and rear furnace mouth positioning blocks are coaxial respectively. The part of the furnace mouth positioning block 10 exposed from the temperature measurement hole is provided with a convex platform along the circumference for limiting the furnace mouth positioning block 10; the temperature measurement hole channels 60 are respectively penetrated between the two center positioning holes 101 and the two eccentric positioning holes 102. The temperature measurement hole channel 60 is a hollow long tube made of alumina ceramic, and its outer diameter is matched with the diameters of the center positioning hole 101 and the eccentric positioning hole 102.

[0035] As Figure 3 , two sets of locking clamps 20 with the same structure are provided, each including a hoop 201 and a positioning pin 202. The two hoops 201 are respectively locked on the convex platforms of the front and rear furnace mouth positioning blocks. Four positioning pins 202 are evenly arranged on the outer circumference of the hoop 201, so that the included angle between adjacent positioning pins 202 is 90°. Among them, two positioning pins 202 are parallel to the connection line of the centers of the two holes on the furnace mouth positioning block 10, and the other two positioning pins 202 are perpendicular to the connection line of the centers of the two holes on the furnace mouth positioning block 10. The positioning pins 202 are used to connect the rotary positioner 30.

[0036] As Figure 4, the rotating positioner 30 is made of carbon steel and includes a connecting arm 301, a rotating rod 302, and a handle sleeve 303. There are two connecting arms 301 in total, which are installed in parallel at both ends of the rotating rod 302 and the installation positions are adjustable. The two connecting arms 301 are respectively sleeved on the positioning pins 202 in the same direction on the two locking clamps 20. The rotating positioner 30 connects the front and rear furnace mouth positioning blocks into one body to ensure their synchronous movement and stability. The surface of the connecting arm 301 is chrome-plated. The handle sleeve 303 is installed in the middle of the connecting arm 301 for hand-held operation.

[0037] As Figure 5 , the limiting support frame 40 is made of carbon steel and includes a positioning base 401, a support rod 402, and a limiting platform 403. The positioning base 401 is installed on the tubular calibration furnace 50 through a positioning groove or a pin. The support rod 402 is installed on the positioning base 401, and a limiting platform 403 is installed at its top to make the limiting platform 403 at the same height as the center position of the furnace mouth of the tubular calibration furnace 50. The height of the support rod 402 is adjustable to adapt to different models of tubular calibration furnaces. There are two groups of limiting support frames 40, which are respectively installed on both sides of the tubular calibration furnace 50. Operate the connecting arm 301 to make the front and rear furnace mouth positioning blocks rotate together until the connecting arm 301 lands on the limiting platform 403 and stops rotating to ensure that the rotation angle of the furnace mouth positioning block 10 is 90° each time. In some embodiments, adjustable foot pads are installed at the bottom of the support rod 402, and the height is adjusted through a rotating mechanism. In other embodiments, the support rod 402 adopts a multi-section telescopic tube design, and the overall height is adjusted by pulling out or pushing in the tube sections and fixed at the required height through a locking mechanism.

[0038] A method for using a synchronous flipping device for a positioning block of a tubular calibration furnace includes:

[0039] Step 1: Install the two furnace mouth positioning blocks 10 in the two temperature measurement holes of the tubular calibration furnace 50 respectively, so that the two eccentric positioning holes 102 are both directly above the center positioning hole 101. Insert a temperature measurement hole channel 60 through the two center positioning holes 101, and place a fixed standard thermocouple in this temperature measurement hole channel 60. Insert another temperature measurement hole channel 60 between the two eccentric positioning holes 102, and place a moving standard thermocouple in this temperature measurement hole channel 60.

[0040] Step 2: Lock the two locking clamps 20 on the two furnace mouth positioning blocks 10 respectively, so that the positioning pin 202 is parallel or perpendicular to the line connecting the centers of the two holes on the furnace mouth positioning block 10.

[0041] Step 3: Install the two groups of limiting support frames 40 on both sides of the tubular calibration furnace 50, and adjust the height of the support rod 402 so that the limiting platform 403 is at the same height as the center position of the furnace mouth of the tubular calibration furnace 50.

[0042] Step 4: Adjust the distance between the two connecting arms 301 on the rotary positioner 30, and respectively put them on the positioning pins 202 at the uppermost positions on the two locking clamps 20 to connect the two furnace mouth positioning blocks 10 into one body, as shown in Figure 6 .

[0043] Step 5: During the calibration process of the tubular verification furnace, when it is necessary to rotate the furnace mouth positioning block 10, rotate the rotary positioner 30 clockwise or counterclockwise from the uppermost position until the rotary rod 302 lands on the limiting platform 403, so that the two furnace mouth positioning blocks 10 rotate synchronously by 90°; Remove the rotary positioner 30 and put it on the two positioning pins 202 at the uppermost position again to prepare for the next rotation to ensure that the rotation angle of the furnace mouth positioning block 10 is 90° each time.

[0044] Step 6: Move the moving standard thermocouple according to the temperature field test technical specification of the thermocouple verification furnace, calculate the potential difference, and then convert it into temperature, and the test of the axial temperature field of the tubular verification furnace 50 can be completed.

[0045] Step 7: When testing the radial temperature field of the tubular verification furnace 50, place the measuring ends of the fixed standard thermocouple and the moving standard thermocouple on the axial central cross-section of the tubular verification furnace 50. Install the rotary positioner 30 on the positioning pin 202 at the highest position, and rotate the rotary rod 302 clockwise until it lands on the limiting platform 403, so that the two furnace mouth positioning blocks 10 rotate synchronously by 90° in the temperature measurement holes. Repeat the above steps to move the moving standard thermocouple successively at the upper, right, lower, and left four positions on the axial central cross-section of the tubular verification furnace 50, and respectively test and measure the thermoelectric potential of the fixed standard thermocouple at each position; Then rotate the rotary rod 302 counterclockwise to move the moving standard thermocouple successively at the left, lower, right, and upper four positions on the axial central cross-section of the tubular verification furnace 50, and respectively test and measure the thermoelectric potential of the fixed standard thermocouple and the moving standard thermocouple at each position. After data processing, the test of the radial temperature field of the tubular verification furnace 50 can be completed.

[0046] In summary, the above is only the preferred embodiment of the present invention and is not used to limit the protection scope of 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. A synchronous turning device for positioning blocks of a tubular calibration furnace, characterized in that: The invention comprises a furnace mouth positioning block (10), a locking clamp (20), a rotation positioner (30), and a limiting support frame (40); the furnace mouth positioning block (10) comprises two identical structures, both of which are provided with a central positioning hole (101), and the side of the central positioning hole (101) is provided with an eccentric positioning hole (102) arranged axially; the two furnace mouth positioning blocks (10) are respectively installed in two coaxially arranged temperature measuring holes on a tubular calibration furnace (50), and the two holes of the two are respectively coaxial; there are two locking clamps (20), which are respectively installed in the parts of the two furnace mouth positioning blocks (10) exposed from the temperature measuring holes, and a plurality of positioning pins (202) are evenly distributed on the circumference thereof; the two locking clamps (20) are respectively installed in the parts of the two furnace mouth positioning blocks (10) exposed from the temperature measuring holes, and the circumferences of the two locking clamps are evenly distributed with a plurality of positioning pins (202); the two locking clamps are respectively installed in the parts of the two furnace mouth positioning blocks (10) exposed from the temperature measuring holes, and ... The positioning pins (202) on the clamp (20) are arranged in the same direction; the rotation positioner (30) comprises a rotation rod (302) and two connecting arms (301) fixedly connected to the two ends of the rotation rod (302); the two connecting arms (301) are respectively sleeved on the two positioning pins (202) arranged in the same direction, and the two furnace mouth positioning blocks (10) are connected into one body; the two limiting support frames (40) are installed on both sides of the tubular calibration furnace (50), and the top surfaces thereof are at the same height as the center position of the furnace mouth of the tubular calibration furnace (50); the connecting arms (301) are operated to make the two furnace mouth positioning blocks (10) rotate together until the connecting arms (301) fall on the limiting platform (403).

2. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1 is characterized in that: The furnace mouth positioning block (10) is made of alumina ceramics.

3. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1 is characterized in that: The temperature measurement channel (60) is respectively inserted between the two central positioning holes 101 and the two eccentric positioning holes 102. The temperature measurement channel (60) is a hollow long tube, and its outer diameter matches the aperture of the central positioning hole (101) and the eccentric positioning hole (102).

4. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 3 is characterized in that: The material of the temperature measurement channel (60) is alumina-based ceramics.

5. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1, characterized in that: The locking clamp (20) has four positioning pins (202) evenly distributed around its circumference, so that the angle between adjacent positioning pins (202) is 90 degrees, and the positioning pins (202) are parallel or perpendicular to the line connecting the centers of the two holes on the furnace opening positioning block (10).

6. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1, characterized in that: A handle sleeve (303) is installed in the middle of the connecting arm (301).

7. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1, characterized in that: The rotary positioner (30) is made of carbon steel.

8. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 1, characterized in that: The positioning support frame (40) comprises a positioning base (401), a support rod (402), and a positioning platform (403). The positioning base (401) is installed on the tubular calibration furnace (50), the support rod (402) is installed on the positioning base (401), and the positioning platform (403) is installed on the top of the positioning base (401) so that the positioning platform (403) is at the same height as the center position of the furnace mouth of the tubular calibration furnace (50).

9. The synchronous turning device for positioning blocks of a tubular calibration furnace according to claim 7, characterized in that: The support rod (402) is height-adjustable to accommodate different types of tubular calibration furnaces.

10. A method for using the synchronous turning device for positioning blocks of a tubular calibration furnace according to any one of claims 1 to 9, characterized in that: The steps include: Step 1, installing two furnace opening positioning blocks (10) in two temperature measuring holes of a tubular calibration furnace (50) respectively, making the two eccentric positioning holes (102) and the two central positioning holes (101) coaxial respectively, inserting a temperature measuring channel (60) between the two central positioning holes (101), placing a fixed standard couple in the temperature measuring channel (60), inserting another temperature measuring channel (60) between the two eccentric positioning holes (102), placing a movable standard couple in the temperature measuring channel (60); Step 2, respectively locking the two locking clamps (20) on the two furnace opening positioning blocks (10) so that the positioning pins (202) on the two locking clamps (20) are arranged in the same direction; Step 3, installing two sets of limit support frames (40) on both sides of the tubular calibration furnace (50), with the top surfaces thereof being at the same height as the center position of the furnace opening of the tubular calibration furnace (50); Step 4, respectively sleeve the two connecting arms (301) on the rotary positioner (30) onto the two positioning pins (202) in the same direction on the two locking clamps (20), and connect the two furnace opening positioning blocks (10) into one; Step 5, during the calibration process of the tubular calibration furnace, when the furnace mouth positioning block (10) needs to be rotated, the rotary positioner (30) is rotated clockwise or counterclockwise until the rotating rod (302) falls on the limit platform (403); the rotary positioner (30) is removed and again mounted on the two outer positioning pins (202) to prepare for the next rotation.

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