Device for synchronously measuring inner hole temperature and inner diameter of hot charging roller sleeve

Abstract

The invention relates to the technical field of roller sleeve measuring tools, and discloses a hot charging roller sleeve inner hole temperature and inner diameter synchronous measuring device which comprises an upper supporting frame, a bottom support and a hollow column assembly, a temperature displayer and a hollow column height scale are installed on the upper supporting frame, and a roller sleeve inner hole diameter scale positioning pointer disc is arranged at the upper end of the hollow column assembly. A plurality of layers of measuring mechanisms are arranged on the peripheral wall of the hollow column assembly, each measuring mechanism comprises an inner diameter measuring unit and a temperature measuring unit, a threading supporting pipe is connected among the plurality of layers of measuring mechanisms, temperature measuring cables are arranged in the threading supporting pipes and the upper supporting frame, and the temperature measuring cables are connected with the temperature measuring units and the temperature display instrument. The device can measure and display temperatures and thermal expansion amounts of different positions of an inner hole in the roller sleeve heating process at the same time, accurately monitors and controls the temperatures of the middle and two ends of the roller sleeve when the large roller sleeve is heated in a pit furnace, guarantees uniform temperature change of different axial parts of the roller sleeve in the heating process, and enables the inner hole of the roller sleeve to obtain consistent thermal expansion amounts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roll sleeve measuring devices, and more particularly to a device for synchronously measuring the temperature and inner diameter of a hot-mounted roll sleeve. BACKGROUND

[0002] Large metallurgical roll sleeves have relatively large diameters and widths, such as the maximum roll body length of a large plate mill backup roll exceeds 5000 mm (5600 mm for a plate mill in Zhoukou Iron and Steel), and the maximum diameter of the roll body exceeds 2000 mm. Due to the large diameter and length of the roll body of the backup roll, the maximum weight of the integral forged plate mill backup roll exceeds 150 tons, and the weight of the blank is close to 300 tons. Therefore, the casting, forging and heat treatment are difficult, and defects such as shrinkage, shrinkage porosity and segregation are prone to occur in the core of the backup roll. The manufacture of large plate mill backup rolls by using the hot mounting method of roll sleeve and roll shaft can reduce the manufacturing difficulty and scrap rate by reducing the volume and weight of the roll sleeve and roll shaft, and the working performance and service life of the roll sleeve can be improved by separate forging and heat treatment.

[0003] The larger the diameter, thickness and length of the roll sleeve, the more difficult the process control of the hot mounting of the roll sleeve. The roll sleeve heating process is generally vertical heating (axis vertical direction) in a pit furnace. The axial height and diameter of the large roll sleeve are relatively large (the maximum length exceeds 5 m, and the maximum diameter exceeds 2 m). The temperature of the inner hole of the roll sleeve is difficult to measure, so the temperature displayed by the temperature sensor arranged in the heating furnace is generally used as the temperature of the roll sleeve. If there is a certain difference in the heating speed and temperature of the inner hole of the roll sleeve, the axial ends and the middle position during the heating process, a certain thermal stress will be generated in the roll sleeve, and the thermal expansion deformation of the inner hole of the roll sleeve will be unevenly distributed along the axis. If there is a significant difference in the diameter of the inner hole of the roll sleeve along the axis, the roll shaft will be prematurely locked with the part with a smaller thermal expansion amount in the inner hole of the roll sleeve during the hot mounting process, which will result in the failure of the hot mounting. After the roll shaft is locked, it is very difficult to disassemble the roll sleeve and the roll shaft, which will cause irreparable economic losses.

[0004] Therefore, the temperature of the inner hole of the roll sleeve at different positions and the diameter of the inner hole of the roll sleeve need to be strictly controlled during the heating and hot mounting of the large metallurgical roll sleeve. The temperature difference between the bottom, middle and top of the inner hole of the roll sleeve during the heating process is controlled within a small range, which can not only ensure the residual stress and residual strain in the roll sleeve, but also ensure that there is no significant difference in the inner diameter of the two ends and the middle of the inner hole of the roll sleeve after heating. This can ensure the smooth progress of the mounting process and the use performance of the mounted roll. SUMMARY

[0005] Therefore, the present application provides a device for simultaneously measuring the temperature and inner diameter of a hot-mounted roller sleeve, which can measure and display the temperature and thermal expansion of different positions in the inner hole of the roller sleeve during the heating process, accurately monitor and control the temperature of the middle and both ends of the roller sleeve during the heating of the roller sleeve in a pit furnace, and ensure that the temperature of different parts of the roller sleeve changes uniformly during the heating process and that the inner hole of the roller sleeve receives a consistent thermal expansion.

[0006] To achieve the above object, the device for simultaneously measuring the temperature and inner diameter of a hot-mounted roller sleeve comprises an upper support frame, a bottom support frame and a hollow column assembly, the upper support frame and the bottom support frame are arranged at the upper and lower ends of the hollow column assembly respectively, a temperature display instrument and a hollow column height scale arranged along the axial direction of the hollow column assembly are mounted on the upper support frame, a motor is mounted on the upper support frame, and the motor is in driving connection with a bearing on the hollow column assembly to drive the movement of the hollow column assembly.

[0007] A roller sleeve inner hole diameter scale positioning pointer disc is arranged at the upper end of the hollow column assembly, a plurality of layers of measuring mechanisms are movably arranged on the outer peripheral wall of the hollow column assembly in the axial direction, the measuring mechanisms comprise inner diameter measuring units and temperature measuring units, and the inner diameter measuring units in adjacent two layers of measuring mechanisms are arranged in a staggered manner.

[0008] A threading support pipe is connected between the plurality of layers of measuring mechanisms, the two ends of the threading support pipe are connected with the upper support frame and the bottom support frame respectively, a temperature measuring cable is arranged in the threading support pipe and the upper support frame, a threading hole is arranged on the upper support frame, and the temperature measuring cable is arranged in the threading support pipe and the threading hole to connect the temperature measuring units and the temperature display instrument.

[0009] Preferably, the hollow column assembly comprises an upper pressure rod connecting hollow column, a middle pressure rod connecting hollow column and a lower pressure rod connecting hollow column which are sequentially connected from top to bottom, and at least one layer of measuring mechanisms is arranged on the outer peripheral wall of each of the upper pressure rod connecting hollow column, the middle pressure rod connecting hollow column and the lower pressure rod connecting hollow column.

[0010] Preferably, the inner diameter measuring unit comprises an inner diameter measuring pressure rod hingedly connected to the hollow column assembly at one end, and an inner hole surface measuring pressure head movably connected to the other end of the inner diameter measuring pressure rod.

[0011] Preferably, a pin shaft is arranged at the other end of the inner diameter measuring pressure rod, the axis of the pin shaft is perpendicular to the axis of the inner diameter measuring pressure rod, the inner hole surface measuring pressure head is rotatably connected to the pin shaft, and a torsional spring is arranged on the pin shaft to elastically connect the inner hole surface measuring pressure head and the other end of the inner diameter measuring pressure rod.

[0012] Preferably, the temperature measuring unit comprises a temperature measuring pressure rod hinged at one end to the hollow column assembly, and a temperature measuring thermocouple head movably connected at the other end of the temperature measuring pressure rod, and the temperature measuring thermocouple head is electrically connected to the temperature display instrument through a temperature measuring cable.

[0013] Preferably, a spiral compression spring and a temperature head bracket are arranged in the other end of the temperature measuring pressure rod, the spiral compression spring is arranged at one side of the temperature head bracket, the temperature measuring thermocouple head is arranged at the other side of the temperature head bracket, and an insulating and heat-insulating blocking ring is arranged at the end of the other end of the temperature measuring pressure rod to prevent the temperature head bracket from being separated from the temperature measuring pressure rod.

[0014] Preferably, a temperature measuring wire hole is arranged on the side wall of the temperature measuring pressure rod and communicates with the inner cavity of the wire passing support tube and the inner cavity of the temperature measuring pressure rod, and a fixed clamp holder for clamping the temperature measuring cable is arranged at the temperature measuring wire hole.

[0015] Preferably, a hemispherical hole base is arranged on the outer peripheral wall of the hollow column assembly, a ball head connecting rod is movably arranged on the hemispherical hole base through an internally threaded ball head pressing sleeve, and the connecting rod segment of the ball head connecting rod is fixedly connected to the inner diameter measuring unit or the temperature measuring unit.

[0016] Preferably, a mounting rack is arranged on the upper support frame, and the temperature display instrument and the hollow column height scale are arranged on the mounting rack.

[0017] Preferably, a polygonal connecting rib plate is arranged on the upper support frame, and an annular tubular rib plate is arranged on the bottom support frame.

[0018] According to the above technical solution, compared with the prior art, the hot-mounted roller sleeve inner hole temperature and inner diameter synchronous measuring device provided by the present application has the following beneficial effects:

[0019] 1. In the present application, one end of the measuring mechanism is connected to the hollow column assembly, which ensures that the measuring mechanism can be automatically positioned according to the height position of the hollow column assembly and the position of the inner wall of the roller sleeve. The other end of the measuring mechanism passes through the inner hole of the outer ring hollow tube and is supported thereby along the height direction and the circumferential direction. By adjusting the vertical height position of the hollow column assembly, the outer end of the measuring mechanism is expanded outward. The temperature measuring unit and the inner diameter measuring unit can automatically adjust the axial position of the measuring device to realize the automatic centering function during the process of being close to the inner wall.

[0020] 2. In the present application, an inner diameter detection size display scale is designed. The roller sleeve inner diameter at different adjustment heights is calculated through the mathematical model between the given height adjustment value and the roller sleeve inner diameter detection value. The height display scale corresponds to the inner diameter display scale scale, and the real-time display of the roller sleeve inner hole diameter detection result can be realized.

[0021] 3. The temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application can realize that the temperature measuring head and the pressure head are closely attached to the inner hole of the roller sleeve by the spiral compression spring and the torsion spring of the temperature measuring head and the pressure head, and can realize real-time monitoring of the temperature and the inner diameter size at different positions in the inner hole of the roller sleeve during the heating process of the roller sleeve, thereby providing guarantee for the smooth and safe hot mounting of the roller sleeve and the roller shaft.

[0022] 4. The temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application can increase the number of the intermediate hollow column assemblies and the measuring mechanisms according to the diameter and length of the roller sleeve, so as to increase the detection points and be flexibly applicable to the detection requirements during the heating process of different roller sleeves, and can realize separate temperature measurement, inner diameter measurement or simultaneous temperature and inner diameter measurement of the inner hole of the roller sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application;

[0025] Figure 2 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application viewed from above after removing the inner hole diameter scale positioning pointer disc of the roller sleeve;

[0026] Figure 3 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application in the B direction; Figure 1

[0027] Figure 4 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application in the C direction; Figure 1

[0028] Figure 5 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application at the position I; Figure 1

[0029] Figure 6 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application at the position II; Figure 1

[0030] Figure 7 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application in the A-A section; Figure 6

[0031] Figure 8 It is a schematic diagram of the temperature and inner diameter synchronous measuring device for the hot-mounted roller sleeve according to the present application at the position III; Figure 1

[0032] Figure 9 ​​​​​​a schematic view of the local part in the present application Figure 1 a schematic view of the local part in the present application

[0033] Figure 10 a schematic view of the local part in the present application Figure 1 a schematic view of the local part in the present application

[0034] Figure 11 a schematic view of the local part in the present application

[0035] Figure 12 a schematic view of the local part in the present application Figure 11 a schematic view of the local part in the present application

[0036] Figure 13 a schematic view of the local part in the present application Figure 2 a schematic view of the local part in the present application

[0037] Figure 14 a schematic view of the local part in the present application Figure 13 a schematic view of the local part in the present application

[0038] Figure 15 a schematic view of the local part in the present application

[0039] BRIEF DESCRIPTION OF DRAWINGS 1, lower pressing rod connecting hollow column; 2, bottom support; 3, bottom heat insulation layer; 4, temperature measuring thermocouple measuring head; 5, insulating heat insulation block; 6, temperature measuring head bracket; 7, spiral compression spring; 8, temperature measuring pressure rod; 9, temperature measuring line fixed clamp; 10, pressure rod outer heat insulation layer; 11, threading support pipe; 12, roller sleeve inner hole bottom surface temperature measuring cable; 13, roller sleeve inner wall top surface temperature measuring cable; 14, mounting frame; 15, upper support frame; 16, hollow column height scale; 17, temperature display instrument; 18, thrust bearing; 19, internal thread hole transmission gear; 20, roller sleeve inner hole diameter scale positioning pointer disc; 21, countersunk screw; 22, shaft end block; 23, roller sleeve inner diameter display scale; 24, motor; 25, internal thread ball head compression sleeve; 26, ball head connecting rod; 27, half ball hole base; 28, inner hole top temperature measuring thermocouple installation pressure rod; 29, upper pressing rod connecting hollow column; 30, middle pressing rod connecting hollow column; 31, torsion spring; 32, pin shaft; 33, inner hole surface measuring pressure head; 34, inner diameter measuring pressure rod; 35, threading hole; 36, polygonal connecting rib plate; 37, annular tubular rib plate; 38, lifting hook; 39, heat insulation protective cover; 40, shaft coupling; 41, roller sleeve; 42, heat insulation protective layer; 43, outer heat insulation layer. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of one example embodiment below is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0041] As shown in Figure 1 , Figure 10 The disclosed hot-mounted roller sleeve inner hole temperature and inner diameter synchronous measurement device comprises an upper support frame 15, a bottom support 2 and a hollow column assembly. The upper support frame 15 and the bottom support 2 are respectively arranged at the upper and lower ends of the hollow column assembly.

[0042] As shown in Figure 2 , Figure 3 The upper support frame 15 is provided with a temperature display instrument 17 and a hollow column height scale 16 arranged along the axial direction of the hollow column assembly. The upper support frame 15 is provided with a mounting bracket 14. The temperature display instrument 17 and the hollow column height scale 16 are arranged on the mounting bracket 14. The upper support frame 15 is provided with a motor 24 (a servo motor). The motor 24 is in transmission connection with a thrust bearing 18 on the hollow column assembly to drive the movement of the hollow column assembly. The outer side of the upper support frame 15 is coated with a heat insulation layer 42. The outer side of the motor 24 is provided with a heat insulation protective cover 39.

[0043] The upper end of the hollow column assembly is provided with a roller sleeve inner hole diameter scale positioning pointer disc 20 for displaying the inner diameter of the roller sleeve 41 after heating. A plurality of layers of measurement mechanisms are movably arranged on the outer peripheral wall of the hollow column assembly along the axial direction. The measurement mechanisms comprise inner diameter measurement units and temperature measurement units. The inner diameter measurement units in adjacent two layers of measurement mechanisms are arranged in a staggered manner.

[0044] The plurality of layers of measurement mechanisms are connected with a threading support pipe 11. The outer side of the threading support pipe 11 is coated with an outer heat insulation layer 43. The two ends of the threading support pipe 11 are respectively connected with the upper support frame 15 and the bottom support 2. The threading support pipe 11 and the upper support frame 15 are provided with temperature measurement cables. The upper support frame 15 is provided with a threading hole 35. The temperature measurement cables are arranged in the threading support pipe 11 and the threading hole 35 to connect the temperature measurement units and the temperature display instrument 17.

[0045] As shown in Figure 4 , Figure 5As shown, the temperature measuring unit comprises a temperature measuring pressure rod 8 hinged to the hollow column assembly at one end, the other end of the temperature measuring pressure rod 8 movably connected with a temperature measuring thermocouple head 4, the temperature measuring thermocouple head 4 electrically connected with a temperature display instrument 17 through a temperature measuring cable. The other end of the temperature measuring pressure rod 8 is internally provided with a spiral compression spring 7 and a temperature head bracket 6, the spiral compression spring 7 is arranged at one side of the temperature head bracket 6, the temperature measuring thermocouple head 4 is arranged at the other side of the temperature head bracket 6, and the end of the other end of the temperature measuring pressure rod 8 is provided with an insulating and heat insulating blocking ring 5 for preventing the temperature head bracket 6 from being separated from the temperature measuring pressure rod 8.

[0046] The hollow column assembly comprises an upper pressure rod connecting hollow column 29, an intermediate pressure rod connecting hollow column 30 and a lower pressure rod connecting hollow column 1 connected in sequence from top to bottom, and at least one layer of measuring mechanism is arranged on the outer peripheral wall of the upper pressure rod connecting hollow column 29, the intermediate pressure rod connecting hollow column 30 and the lower pressure rod connecting hollow column 1. The large roller sleeve has a large inner hole diameter and a large axial length, so in order to accurately detect the temperature and the inner hole diameter size of the roller sleeve 41 at different positions in the heating process, if the length size of the roller sleeve 41 is very large or the measurement requirement is high, the number of intermediate hollow columns and temperature measuring pressure rods 8 can be increased according to the size of the roller sleeve 41 and the detection requirement.

[0047] In the embodiment, one layer of measuring mechanism is arranged on the outer peripheral wall of the upper pressure rod connecting hollow column 29, the intermediate pressure rod connecting hollow column 30 and the lower pressure rod connecting hollow column 1, each layer of measuring mechanism comprises an inner diameter measuring unit and two temperature measuring units, a temperature measuring thermocouple, an inner diameter measuring pressure head or both a temperature measuring thermocouple and an inner diameter measuring pressure head can be installed according to the detection requirement (the inner hole of the roller sleeve 41 can be separately measured for temperature, inner diameter or both temperature and inner diameter), the circumferential contact position of the temperature measuring pressure rod and the inner diameter measuring pressure head at different height positions with the inner wall can be adjusted by adjusting the screwing position of the inner and outer threads of the three hollow columns, the temperature and the inner diameter size at any circumferential position of the inner wall can be realized, and the randomness and contingency of the inner wall temperature and inner diameter measurement can be avoided to a certain extent.

[0048] As shown in Figure 6 , Figure 7 As shown, the inner diameter measuring unit comprises an inner diameter measuring pressure rod 34 hinged to the hollow column assembly at one end, the other end of the inner diameter measuring pressure rod 34 movably connected with an inner hole surface measuring pressure head 33. The other end of the inner diameter measuring pressure rod 34 is provided with a pin shaft 32, the axis of the pin shaft 32 is perpendicular to the axis of the inner diameter measuring pressure rod 34, the inner hole surface measuring pressure head 33 is rotatably connected to the pin shaft 32, and the pin shaft is provided with a torsional spring 31 elastically connecting the inner hole surface measuring pressure head 33 and the other end of the inner diameter measuring pressure rod 34.

[0049] As shown in Figure 8As shown, a hemispherical hole base 27 is provided on the outer peripheral wall of the hollow column assembly. A ball head connecting rod 26 is movably installed on the hemispherical hole base 27 through an internally threaded ball head clamping sleeve 25. The connecting rod section of the ball head connecting rod 26 is fixedly connected to the inner diameter measuring unit or the temperature measuring unit.

[0050] One end of the umbrella-shaped measuring mechanism is connected to the middle hollow column assembly via the ball joint 26, ensuring that the measuring mechanism can be automatically positioned according to the height position of the middle hollow column assembly and the inner wall position of the roller sleeve 41. The other end of the measuring mechanism passes through the inner hole of the outer hollow tube and is supported by it along the height and circumferential directions. By adjusting the vertical height position of the hollow column assembly, the outer end of the measuring mechanism expands outward. At the same time, the temperature measuring thermocouple head 4, the spiral compression spring 7, and the torsion spring 31 can make the temperature measuring thermocouple head 4 and the inner hole surface measuring pressure head 33 fit tightly against the inner hole of the roller sleeve 41. During the process of the temperature measuring thermocouple head 4 and the inner hole surface measuring pressure head 33 of the same layer fitting tightly against the inner wall, the axis position of the measuring device can be automatically adjusted to achieve the centering function.

[0051] like Figure 9 As shown, the side wall of the temperature measuring rod 8 is provided with a temperature measuring wire hole that connects the inner cavity of the wire support tube 11 and the inner cavity of the temperature measuring rod 8. A fixing clip 9 for holding the temperature measuring cable is provided at the temperature measuring wire hole.

[0052] like Figure 11 , Figure 12 The measuring device shown has a bottom connecting bracket 2. Three square hollow tubes are uniformly welded to the circumference of the outer cylindrical surface of a hollow column. These three hollow tubes pass through the square holes of the annular tubular rib plate 37 and are welded together. A lower pressure rod connecting to the hollow column 1 passes through the central hole of the bracket. The outer ends of the hollow square tubes are welded to the outer surfaces of the three hollow round tubes (thread support tube 11). The lower pressure rod connecting to the hollow column 1 passes through the central hole of the connecting bracket 2, with a gap maintained between their cylindrical surfaces to ensure that the lower pressure rod connecting to the hollow column 1 can move axially up and down.

[0053] like Figure 13 , Figure 14As shown, the upper support frame 15 consists of six evenly distributed square hollow tubes (three long and three short) welded to the outer surface of an outer square and inner circular hollow column. During measurement, the measuring device is hoisted into the roller sleeve 41 by three hooks 38 on the upper surface of the three longer square hollow tubes, so that the bottom plane of the square hollow tubes is placed on the upper end face of the roller sleeve 41. After machining round holes at the bottom of the three shorter square hollow tubes, a wire-passing support tube 11 is welded to its bottom plane and a wire-passing hole is machined on its upper surface, so that the hollow area of ​​the circular tube is connected to the hollow area of ​​the square tubes, so that the temperature measuring cable can be passed through the internal cavity and connected to the temperature display instrument 17. A mounting frame 14 is provided on the upper support frame 15, and the temperature display instrument 17 is fixed to the outer surface of the mounting frame 14. To ensure the stability of the test support structure, a polygonal connecting rib plate 36 is provided on the upper support frame 15. In this embodiment, six rib plates are used to weld the six hollow square tubes together to form a regular hexagon.

[0054] Based on the relationship between the structural dimensions of the measuring device, the height adjustment value, and the inner diameter of the roller sleeve, this invention provides an inner diameter calculation model and determines the inner diameter display scale based on this model:

[0055] like Figure 15 As shown, when the temperature measuring rod 8 is in the initial position, the connection position between the temperature measuring rod 8 and the middle hollow column assembly is point 1, and the angle between it and the hollow column assembly is α. At this time, the distance between the outermost end of the temperature measuring rod 8 and the axis of the middle hollow column assembly is R0, which means that the minimum diameter of the inner hole of the roller sleeve 41 that can be detected by this detection device cannot be less than R0.

[0056] When the vertical direction of the intermediate hollow column assembly moves downward until the temperature measuring thermocouple head 4 and the inner hole surface measuring pressure head 33 are pressed against the inner hole of the roller sleeve 41, if the height of the intermediate hollow column assembly decreases by Δh, the connection position between the temperature measuring pressure rod 8 and the hollow column assembly moves from point 1 to point 2, and the vertical angle between the temperature measuring pressure rod 8 and the intermediate hollow column assembly increases from α to β, while the support position of the temperature measuring pressure rod 8 remains unchanged. Therefore, the distance between the outermost end of the temperature measuring pressure rod 8 and the axis of the intermediate hollow column assembly increases from R0 to R.

[0057] R0=L0·sinα

[0058] D0=2R0=2L0·sinα

[0059]

[0060] R0=L0·sinα

[0061]

[0062] in:

[0063] L0 represents the sum of the length of the temperature measuring pressure rod 8 and the length of the temperature measuring thermocouple head 4 or the length of the inner hole surface measuring pressure head 33;

[0064] r0 represents the radial distance between the axis of the hollow cylinder assembly and the ball center of the ball head connecting rod 26;

[0065] R0 and D0 are the minimum radius and the minimum diameter of the measuring device measurable sleeve 41 respectively (at this time, the upper pressure rod connected to the top of the upper hollow cylinder 29 is at the highest position, and the inner hole diameter scale positioning pointer plate 20 is aligned with the 0 value of the hollow cylinder height scale 16);

[0066] Δh is the height adjustment value;

[0067] R and D are the inner hole radius and inner hole diameter measurement display values of the sleeve 41 respectively.

[0068] The above-mentioned hollow cylinder height scale 16 displays the intermediate hollow cylinder height position, and the height change range Δh can be obtained by the change of the height coordinate value of the pressure rod after the inner diameter measuring pressure head is pressed against the inner wall of the sleeve 41 before and after heating the sleeve 41, and the inner hole diameter of the sleeve 41 after heating can be displayed by the inner hole diameter scale positioning pointer plate 20, and the inner hole diameter of the sleeve 41 after heating can be obtained by the relationship between Δh and R after the inner diameter measuring pressure head is pressed against the inner wall of the sleeve 41.

[0069] When adjusting the height of the central hollow cylinder assembly, the motor 24 drives the pinion through the shaft coupling 40, the pinion drives the internally threaded gear, the gear hole is machined with a transmission thread, and the upper pressure rod connecting hollow cylinder 29 is circumferentially connected to three pressure rods passing through the outer hollow pipe (three vertical hollow pipes passing through the support pipe 11 for the arrangement of the temperature measuring thermocouple wire and the support of the inner diameter measuring pressure rod 34), so that the upper pressure rod connecting hollow cylinder 29 cannot rotate, and the hollow cylinder assembly moves axially during gear rotation to change the height, and the angle between the measuring mechanism and the axis of the hollow cylinder assembly changes (the angle becomes larger when moving downward, and the angle becomes smaller when moving upward), which can adapt to different diameters of the sleeve 41, and the temperature measuring thermocouple head 4 and the inner hole surface measuring pressure head 33 installed with the circumferential measuring mechanism are closely attached to the inner hole surface of the sleeve 41 at different positions in the axial and circumferential directions, which ensures that the temperature measuring thermocouple head 4 and the inner hole surface measuring pressure head 33 are closely attached to the inner hole surface to realize accurate temperature and inner diameter measurement.

[0070] The temperature measuring thermocouple wire is connected with the temperature display instrument 17 through three axis vertical hollow tubes covered with thermal insulation layer (the three hollow tubes are welded together with the outer ends of the three hollow square tubes of the bottom support 2 at the bottom, the three hollow square tubes are connected together through the annular tubular rib plate 37, the thermal insulation plate covers the web, the upper parts of the three hollow round tubes are connected to the upper hollow column through the square hollow steel), the position of the pull rod can be automatically adjusted through the motor 24 so as to press the temperature measuring head 4 of the temperature measuring thermocouple and the inner hole surface measuring pressure head 33 on the umbrella rib support rod to the inner hole surface, and the temperature and the inner hole diameter at different positions of the roll sleeve 41 in the heating process are displayed in real time through the temperature display instrument 17 and the inner diameter size display ruler, and measures can be taken for the inconsistent inner diameters of the middle and both sides of the roll sleeve 41 inner hole caused by the uneven heating of the roll sleeve 41, so as to avoid the irreversible huge economic loss caused by the early locking of the roll shaft and the heating roll sleeve 41 when they are hot-mounted.

[0071] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for simultaneously measuring the inner temperature and inner diameter of a heat-fitting roller sleeve, characterized in that, The assembly includes an upper support frame (15), a bottom support frame (2), and a hollow column assembly. The upper support frame (15) and the bottom support frame (2) are respectively located at the upper and lower ends of the hollow column assembly. The upper support frame (15) is equipped with a temperature display (17) and a hollow column height scale (16) arranged along the axial direction of the hollow column assembly. The upper support frame (15) is equipped with a motor (24), which is connected to a bearing (18) on the hollow column assembly to drive the hollow column assembly to move. The upper end of the hollow column assembly is provided with a roller sleeve inner hole diameter scale positioning pointer disk (20). The outer peripheral wall of the hollow column assembly is provided with a multi-layer measuring mechanism along the axial direction. The measuring mechanism includes an inner diameter measuring unit and a temperature measuring unit. The inner diameter measuring units in two adjacent measuring mechanisms are staggered. The multi-layer measuring mechanism is connected by a wire support tube (11). The two ends of the wire support tube (11) are connected to the upper support frame (15) and the bottom bracket (2) respectively. Temperature measuring cables are installed in the wire support tube (11) and the upper support frame (15). The upper support frame (15) is provided with a wire hole (35). The temperature measuring cable is passed through the wire support tube (11) and the wire hole (35) to connect the temperature measuring unit and the temperature display instrument (17).

2. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The hollow column assembly includes an upper pressure rod connecting hollow column (29), an intermediate pressure rod connecting hollow column (30), and a lower pressure rod connecting hollow column (1) connected sequentially from top to bottom. Each of the upper pressure rod connecting hollow column (29), the intermediate pressure rod connecting hollow column (30), and the lower pressure rod connecting hollow column (1) has at least one layer of measuring mechanism on its outer peripheral wall.

3. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The inner diameter measuring unit includes an inner diameter measuring pressure rod (34) with one end hinged to the hollow column assembly, and an inner hole surface measuring pressure head (33) movably connected to the other end of the inner diameter measuring pressure rod (34).

4. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 3, characterized in that, The other end of the inner diameter measuring pressure rod (34) is provided with a pin (32), the axis of the pin (32) is perpendicular to the axis of the inner diameter measuring pressure rod (34), the inner hole surface measuring pressure head (33) is rotatably connected to the pin (32), and a torsion spring (31) is provided on the pin (32) to elastically connect the inner hole surface measuring pressure head (33) and the other end of the inner diameter measuring pressure rod (34).

5. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The temperature measuring unit includes a temperature measuring rod (8) with one end hinged to the hollow column assembly, and a thermocouple measuring head (4) movably connected to the other end of the temperature measuring rod (8). The thermocouple measuring head (4) is electrically connected to the temperature display instrument (17) through a temperature measuring cable.

6. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 5, characterized in that, The other end of the temperature measuring rod (8) is provided with a helical compression spring (7) and a temperature measuring head bracket (6). The helical compression spring (7) is located on one side of the temperature measuring head bracket (6), and the temperature measuring thermocouple (4) is located on the other side of the temperature measuring head bracket (6). The other end of the temperature measuring rod (8) is provided with an insulating heat-insulating ring (5) to prevent the temperature measuring head bracket (6) from detaching from the temperature measuring rod (8).

7. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 5, characterized in that, The side wall of the temperature measuring rod (8) is provided with a temperature measuring wire hole that connects the inner cavity of the wire support tube (11) and the inner cavity of the temperature measuring rod (8). A fixing clip (9) for holding the temperature measuring cable is provided at the temperature measuring wire hole.

8. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The hollow column assembly has a hemispherical hole base (27) on its outer peripheral wall. A ball head connecting rod (26) is movably installed on the hemispherical hole base (27) through an internal thread ball head clamping sleeve (25). The connecting rod section of the ball head connecting rod (26) is fixedly connected to the inner diameter measuring unit or the temperature measuring unit.

9. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The upper support frame (15) is provided with a mounting frame (14), and the temperature display (17) and the hollow column height scale (16) are provided on the mounting frame (14).

10. The device for synchronously measuring the inner temperature and inner diameter of the hot-fitting roller sleeve according to claim 1, characterized in that, The upper support frame (15) is provided with a polygonal connecting rib plate (36), and the bottom support (2) is provided with an annular tubular rib plate (37).

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