Ceramic valve high-precision thermal matching device and process

Abstract

The application discloses a kind of high-precision thermal matching device and process of ceramic valve, it is related to ceramic valve production technical field, including heat preservation box and cooling box, heat preservation box inside is provided for carrying valve body and the rotary table of valve body lining, for the partition heating device of partition heating to valve body, two for driving partition heating device lifting cylinder and for detecting the 3D camera of valve body heating state, cooling control device is set in cooling box, still be provided with for driving rotary table lifting and entering cooling box through through-hole into driving mechanism.The application is adjusted heating temperature of each position according to each point temperature real-time monitoring result by partition heating device, and is set cooling control device, make up the cooling rate difference of different thickness of part, realize the consistency of part overall temperature drop, reduce the micro deformation of metal part caused by temperature difference thermal stress, improve the consistency of size after metal piece cooling contraction, further improve thermal matching precision and strength.

Description

Technical Field

[0001] This invention relates to the field of ceramic valve manufacturing technology, specifically to a high-precision hot-dispensing device and process for ceramic valves. Background Technology

[0002] With the rapid development of industries such as power, chemical, metallurgy, and oil and gas, extreme working conditions such as high temperature, high pressure, strong corrosion, and high wear have placed higher demands on valve performance. Traditional metal valves are prone to corrosion, erosion, and sealing failure in harsh environments, while high-performance ceramic valves, with their superior wear resistance and corrosion resistance, are gradually becoming the preferred choice for critical equipment.

[0003] The existing technology for hot-fitting ceramic liners in valves involves heating the metal outer shell to expand the valve, then embedding the ceramic liner, which forms an interference fit after cooling. While this method achieves a certain degree of bonding between ceramic and metal, ensuring uniform heating is difficult in practice. Even with an oven, it's challenging to guarantee that all expansion parts of large or multi-chamber valves with complex structures and uneven wall thicknesses reach the same temperature. Localized temperature differences cause uneven expansion, leading to unpredictable internal stresses during cooling. These internal stresses are "invisible," potentially undetectable during assembly, but can become a cause of ceramic component breakage when the valve is subjected to operating pressure or temperature cycling. Therefore, precise calculation and control of the heating temperature are crucial. Insufficient temperature and expansion can cause the ceramic component to "jam" during assembly, creating a difficult situation and easily damaging the part. Excessive temperature may exceed the tempering temperature of the metal material, reducing its hardness and strength, or causing permanent damage to non-metallic components within the valve body (such as sealing rings). Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision hot-dispensing device and process for ceramic valves to solve the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A high-precision heat-dispensing device for ceramic valves includes an insulation box and a cooling box. The insulation box is fixedly installed at the center of the top of the cooling box. A through hole communicating with the cooling box is opened at the bottom of the insulation box. Inside the insulation box, there is a turntable for supporting the valve body and valve liner, a partition heating device for partition heating of the valve body, two cylinders for driving the partition heating device to rise and fall, and a 3D camera for detecting the heating status of the valve body. The turntable is set in the through hole, and the valve body is set on the turntable. The 3D camera is fixed to the top wall of the insulation box by a bracket and is located directly above the valve body. The partition heating device is sleeved on the outside of the turntable and is coaxial with the turntable. The two cylinders are symmetrically arranged on the top wall of the insulation box, and the driving ends of the two cylinders are fixedly connected to the top of the partition heating device. The cooling box is equipped with a cooling control device and a driving mechanism for driving the turntable to rise and fall and enter the cooling box through the through hole.

[0007] In a preferred embodiment of the present invention, the partitioned heating device includes a fixed plate, multiple heating elements, heating element supports, multiple infrared temperature sensors, and multiple sensor supports. The fixed plate is located above the through hole and is fixedly connected to the drive shafts of the two cylinders. The outer dimensions of the fixed plate are adapted to the outer dimensions of the valve body. The multiple heating elements are evenly arranged along the outer dimensions of the fixed plate. The multiple infrared temperature sensors are respectively arranged between two adjacent heating elements. All the heating elements are fixedly installed at the bottom of the fixed plate by multiple heating element supports, and all the infrared temperature sensors are fixedly installed at the bottom of the fixed plate by multiple sensor supports.

[0008] In a preferred embodiment of the present invention, a partition plate is horizontally arranged inside the cooling box, which divides the interior of the cooling box into a buffer zone and a cooling zone. A through hole communicating with a through hole is provided on the top of the cooling box. An entry hole for connecting the buffer zone and the cooling zone is provided on the partition plate. The through hole, the through hole and the entry hole are coaxial. The buffer zone is also provided with two sets of sealing doors for closing the through hole and the entry hole, as well as a plurality of control components for controlling the opening and closing of the two sets of sealing doors.

[0009] In a preferred embodiment of the present invention, the cooling control device is disposed within the cooling zone. The cooling control device includes a chassis, multiple support legs, an infrared temperature measuring camera, a nozzle, a camera bracket for fixing the infrared temperature measuring camera, and an adjustment component for adjusting the moving position of the nozzle. The chassis is fixed to the inner bottom of the cooling box by the multiple support legs. The chassis is a hollow ring shape and is located directly below the inlet hole and coaxial with the inlet hole. The infrared temperature measuring camera is fixed to one side of the top of the chassis by the camera bracket. The adjustment component is installed on the top of the chassis near the infrared temperature measuring camera. The nozzle is installed on the adjustment component.

[0010] In a preferred embodiment of the present invention, the adjustment assembly includes a vertical electric slide, a horizontal electric slide, a slide bracket, a transition plate, and a nozzle bracket. The vertical electric slide is fixed to the upper surface of the chassis via the slide bracket. The transition plate is fixed to the sliding surface of the vertical electric slide. The horizontal electric slide is mounted on the transition plate. The nozzle bracket is mounted on the slide surface of the horizontal electric slide. The nozzle is fixed to the nozzle bracket and faces the rotation center of the turntable. The nozzle can be translated in both vertical and horizontal directions.

[0011] In a preferred embodiment of the present invention, the driving mechanism includes a base, a fixed cylinder, a sliding cylinder, a rotating cylinder, an air pump, and a gear transmission assembly for driving the rotating cylinder to rotate. The base is fixedly mounted on the inner bottom wall of the cooling box. The fixed cylinder is fixedly mounted at the axial center of the base and is coaxial with the turntable. The sliding cylinder is axially sealed and slidably mounted inside the fixed cylinder and extends to the outside of the fixed cylinder. One end of the rotating cylinder is fixed to the bottom of the turntable, and the other end of the rotating cylinder extends into the sliding cylinder and is axially sealed and slidably connected to the sliding cylinder. The fixed cylinder, the sliding cylinder, and the rotating cylinder are sequentially connected. The air pump is mounted on the base, and the output end of the air pump extends into the fixed cylinder and delivers gas into the fixed cylinder. A motor is mounted on one side of the bottom of the turntable, and the output end of the motor is connected to the gear transmission assembly. The gear transmission assembly is rotatably mounted at the bottom of the turntable and is connected to the rotating cylinder through a gear ring drive.

[0012] As a preferred embodiment of the present invention, an mounting plate is fixedly connected to the partition plate, and multiple control components are provided, which are symmetrically arranged on the mounting plate and are respectively connected to each sealing door. An inductive position sensor is installed on the side of the mounting plate near the entry hole, and the inductive position sensor is electrically connected to the multiple control components.

[0013] As a preferred embodiment of the present invention, a set of sealing doors for sealing the inlet hole are symmetrically provided with two receiving grooves for the rotating cylinder to pass through. The two receiving grooves are combined to form a circular groove. A support rod is fixedly connected to the middle position of the top of the turntable, and a disc is fixedly connected to the top of the support rod. The disc is adapted to the circular groove.

[0014] When the turntable descends onto the chassis, the set of sealing doors closes the entry hole, and the disc closes the circular groove on the set of sealing doors.

[0015] As a preferred embodiment of the present invention, fans are installed on both sides of the outer wall of the cooling box. The input end of the fan is connected to an air inlet pipe, and the output end of the fan is connected to an exhaust pipe. The air inlet pipe passes through the cooling box and extends to the buffer zone. The exhaust pipe passes through the insulation box and extends to the inner wall of the insulation box. The exhaust pipe faces the 3D camera.

[0016] A heat-dispensing process for a high-precision heat-dispensing device for ceramic valves includes the following steps:

[0017] S1. The inner bore of the valve body is slightly smaller than the outer circle of the valve body liner. Place the valve body on the turntable and start the cylinder to move the partition heating device down and fit it on the outside of the valve body.

[0018] S2. Start the zone heating device to control the heating temperature and speed of heating elements in different positions. Infrared temperature sensors are equipped at different positions to monitor the temperature difference of each point on the valve body or flange in real time.

[0019] S3. After the valve body is heated to the set temperature in the heat preservation box, the inner hole of the valve body expands. The turntable is driven to descend by the drive mechanism. When the turntable descends and drives the valve body to descend into the buffer zone, the inductive position sensor senses the descending position of the turntable and transmits the signal to the control component. A set of control components drives the set of sealing doors connected to it to close the through hole. Then, another set of control components drives the set of sealing doors connected to it to open. The turntable continues to descend into the cooling zone and is located on the chassis.

[0020] S4. Place the valve body liner at room temperature inside the expanded valve body. Cool the valve body using a cooling control device to achieve uniform cooling. Once the valve body cools to room temperature, the valve body shrinks and forms a tight interference fit with the valve body liner.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. This invention uses a zoned heating device to set gradient temperatures according to different wall thicknesses, which can reduce thermal differences during the heating process of metal parts. The heating temperature at each location is adjusted based on the real-time temperature monitoring results. At the same time, a 3D camera monitors the heating status of the valve body in real time so as to adjust the heating parameters in a timely manner. This enables the scanning detection and recording of thermal deformation dimensions at different stages of temperature. Through a large amount of thermal data, the relationship between temperature and thermal deformation dimensions is generated and continuously optimized, providing data support for the continuous parameter optimization of the thermal process.

[0023] 2. By setting up a cooling control device, the present invention compensates for the difference in cooling rate of parts with different thicknesses, realizes the consistency of the overall temperature drop of the parts, reduces the micro-deformation of metal parts caused by thermal stress due to temperature difference, improves the consistency of the size of metal parts after cooling and shrinkage, and further improves the accuracy and strength of heat fitting. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] Figure 1 This invention provides an overall structural schematic diagram of a high-precision heat-dispensing device for ceramic valves;

[0026] Figure 2 This invention provides a front view of the high-precision heat-dispensing device for ceramic valves;

[0027] Figure 3 This invention provides a front structural sectional view of the insulated box;

[0028] Figure 4 A schematic diagram of the cooling control device is provided for this invention;

[0029] Figure 5 A schematic diagram of the partitioned heating device is provided for this invention.

[0030] The labels in the diagram represent the following:

[0031] 1. Insulation box; 2. Cooling box; 3. Through hole; 4. Turntable; 5. Zoned heating device; 6. Cylinder; 7. 3D camera; 8. Cooling control device; 9. Drive mechanism; 10. Divider plate; 11. Buffer zone; 12. Cooling zone; 13. Through hole; 14. Entry hole; 15. Sealing door; 16. Control components; 17. Mounting plate; 18. Inductive position sensor; 19. Circular slot; 20. Support rod; 21. Disc; 22. Fan; 23. Inlet pipe; 24. Exhaust pipe;

[0032] 41. Valve body; 42. Valve body liner; 51. Fixing plate; 52. Heating element; 53. Heating element bracket; 54. Infrared temperature sensor; 55. Sensor bracket; 81. Chassis; 82. Support leg; 83. Infrared temperature camera; 84. Nozzle; 85. Camera bracket; 86. Vertical electric slide; 87. Horizontal electric slide; 88. Slide bracket; 89. Transition plate; 90. Nozzle bracket; 91. Base; 92. Fixing cylinder; 93. Sliding cylinder; 94. Rotating cylinder; 95. Air pump. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1 - Figure 5 As shown, the present invention provides a high-precision heat-dispensing device for ceramic valves, including an insulation box 1 and a cooling box 2. The insulation box 1 is fixedly installed at the top center of the cooling box 2. The bottom of the insulation box 1 has a through hole 3 communicating with the cooling box 2. The insulation box 1 is equipped with a turntable 4 for supporting the valve body 41, a partition heating device 5 for partition heating of the valve body 41, two cylinders 6 for driving the partition heating device 5 to rise and fall, and a 3D camera 7 for detecting the heating status of the valve body 41. The turntable 4 is installed in the through hole 3, and the valve body 41 is installed on the turntable 4. The 3D camera 7 is fixed to the inner top wall of the insulation box 1 by a bracket and is located directly above the valve body 41. The partition heating device 5 is sleeved on the outside of the turntable 4 and is coaxial with the turntable 4. The two cylinders 6 are symmetrically arranged on the inner top wall of the insulation box 1, and the driving ends of the two cylinders 6 are fixedly connected to the top of the partition heating device 5. The cooling box 2 is equipped with a cooling control device 8 and a driving mechanism 9 for driving the turntable 4 to rise and fall and pass through the through hole 3 into the cooling box 2.

[0035] In the specific implementation process, the working process of the device is as follows: First, the valve body 41 to be processed is placed on the turntable 4. Then, two cylinders 6 are started to drive the partition heating device 5 to descend, so that the partition heating device 5 is fitted on the outside of the valve body 41. Specifically, the partition heating device 5 includes a fixed plate 51, multiple heating elements 52, heating element brackets 53, multiple infrared temperature sensors 54, and multiple sensor brackets 55. The fixed plate 51 is located above the through hole 3 and is fixedly connected to the drive shaft of the two cylinders 6. The outer dimensions of the fixed plate 51 are adapted to the outer dimensions of the valve body 41. Multiple heating elements 52 are evenly arranged along the outer dimensions of the fixed plate 51. Multiple infrared temperature sensors 54 are respectively arranged between two adjacent heating elements 52. All heating elements 52 are fixedly installed at the bottom of the fixed plate 51 through multiple heating element brackets 53, and all infrared temperature sensors 54 are fixedly installed at the bottom of the fixed plate 51 through multiple sensor brackets 55.

[0036] The zoned heating device 5 distributes heating elements 52 according to the structure of the valve body 41. The built-in algorithm controls the heating temperature and rate of heating elements 52 at different positions. Infrared temperature sensors 54 are equipped at different positions to monitor the temperature difference at various points of the valve body 41 or flange in real time. The temperature difference of the heating elements 52 is used to adjust the temperature rise rate at various points of the valve body 41, so as to achieve uniform heating of the valve body 41 as a whole.

[0037] In this invention, the zoned heating device 5 can set gradient temperatures according to different wall thicknesses, reducing thermal differences during the heating process of metal parts. The heating temperature at each location is adjusted based on real-time temperature monitoring results. Simultaneously, the 3D camera 7 monitors the heating status of the valve body 41 in real time and feeds the data back to the control system for timely adjustment of heating parameters. This enables the scanning, detection, and recording of thermal deformation dimensions at different stages. Through extensive thermal integration data, the relationship between temperature and thermal deformation dimensions is generated and continuously optimized, providing data support for continuous parameter optimization of the thermal integration process.

[0038] When the valve body 41 is heated to the set temperature, the drive mechanism 9 is activated, and the drive turntable 4 descends together with the valve body 41, passing through the through hole 3 and entering the cooling box 2.

[0039] At this time, the cooling control device 8 rapidly cools the valve body 41 according to the preset cooling program in order to fix its shape and size after heat matching.

[0040] Specifically, a partition plate 10 is horizontally arranged inside the cooling box 2, which divides the interior of the cooling box 2 into a buffer zone 11 and a cooling zone 12. A through hole 13 communicating with the through hole 3 is opened on the top of the cooling box 2. An inlet hole 14 for connecting the buffer zone 11 and the cooling zone 12 is opened on the partition plate 10. The through hole 3, the through hole 13 and the inlet hole 14 are coaxial. The buffer zone 11 is also provided with two sets of sealing doors 15 for closing the through hole 13 and the inlet hole 14, as well as multiple control components 16 for controlling the opening and closing of the two sets of sealing doors 15.

[0041] The cooling control device 8 is located in the cooling zone 12. The cooling control device 8 includes a chassis 81, multiple support legs 82, an infrared temperature measuring camera 83, a nozzle 84, a camera bracket 85 for fixing the infrared temperature measuring camera 83, and an adjustment component for adjusting the moving position of the nozzle 84. The chassis 81 is fixed to the bottom of the cooling box 2 by multiple support legs 82. The chassis 81 is a hollow ring and is located directly below the inlet hole 14 and coaxial with the inlet hole 14. The infrared temperature measuring camera 83 is fixed to one side of the top of the chassis 81 by the camera bracket 85. The adjustment component is installed on the top of the chassis 81 near the infrared temperature measuring camera 83. The nozzle 84 is installed on the adjustment component.

[0042] The adjustment assembly includes a vertical electric slide 86, a horizontal electric slide 87, a slide bracket 88, a transition plate 89, and a nozzle bracket 90. The vertical electric slide 86 is fixed to the upper surface of the chassis 81 by the slide bracket 88. The transition plate 89 is fixed to the sliding surface of the vertical electric slide 86. The horizontal electric slide 87 is mounted on the transition plate 89. The nozzle bracket 90 is mounted on the slide surface of the horizontal electric slide 87. The nozzle 84 is fixed to the nozzle bracket 90. The nozzle 84 faces the rotation center of the turntable 4 and can be translated in both vertical and horizontal directions.

[0043] When the valve body 41 enters the cooling box 2 after being heated, it will first enter the buffer zone 11. Specifically, a mounting plate 17 is fixedly connected to the partition plate 10. Multiple control components 16 are provided, and the multiple control components 16 are symmetrically arranged on the mounting plate 17 and are respectively connected to each sealing door 15. An inductive position sensor 18 is installed on the side of the mounting plate 17 near the inlet hole 14, and the inductive position sensor 18 is electrically connected to the multiple control components 16.

[0044] When the valve body 41 enters the buffer zone 11, the inductive position sensor 18 quickly senses the position of the valve body 41 and transmits this signal to multiple control components 16. Upon receiving the signal, the control components 16 precisely control the opening of the corresponding sealing door 15 according to a preset program. By controlling the sealing door 15 to close the through hole 13, the valve body 41 temporarily remains in the buffer zone 11, preventing it from experiencing excessive thermal shock due to sudden entry into the cooling zone 12. After initial stabilization, the control components 16 control another set of sealing doors 15 to open the inlet hole 14, through which the valve body 41 enters the cooling zone 12. During this process, the precise transmission of the control components 16 ensures that the timing and extent of the opening of the sealing door 15 are just right, neither causing excessive temperature fluctuations in the cooling box 2 due to opening too early or too wide, nor hindering the entry of the valve body 41 due to opening too late or too small.

[0045] After the valve body 41 enters the cooling zone 12, the turntable 4 slowly rotates the valve body 41 and the valve body liner 42 together. The infrared temperature measuring camera 83 can scan and detect the overall temperature difference of the valve body 41 and identify the angle and height of the high-temperature point. The turntable 4 rotates to a set angle so that the high-temperature point is on the vertical line where the nozzle 84 is located. The vertical electric slide 86 and the horizontal electric slide 87 drive the nozzle 84 to move back and forth and up and down, approaching the high-temperature point. Compressed air is introduced into the nozzle 84, and the system controls the start and stop. After the compressed air is turned on, the air circulation is accelerated to help the high-temperature point cool down quickly. After the cooling of one high-temperature point is completed, the turntable 4 continues to rotate, and the infrared temperature measuring camera 83 scans the valve body 41 again to check for other high-temperature points. If other high-temperature points are found, the above operation process is repeated until the temperature of all parts of the valve body 41 is uniform.

[0046] By setting up a cooling control device 8, the airflow is precisely cooled through nozzles 84, which effectively solves the problem of inconsistent cooling rates caused by different thicknesses of parts. This greatly reduces the impact of thermal stress caused by temperature differences on metal parts and avoids the impact of micro-deformation on the accuracy and strength of heat fitting of metal parts, thus providing a reliable guarantee for the high-precision heat fitting of ceramic valves.

[0047] In actual operation, the drive mechanism 9 drives the turntable 4 to rise and fall. Specifically, the drive mechanism 9 includes a base 91, a fixed cylinder 92, a sliding cylinder 93, a rotating cylinder 94, an air pump 95, and a gear transmission assembly for driving the rotating cylinder 94 to rotate. The base 91 is fixedly installed on the inner bottom wall of the cooling box 2. The fixed cylinder 92 is fixedly installed at the axial position of the base 91 and is coaxial with the turntable 4. The sliding cylinder 93 is axially sealed and slidably installed inside the fixed cylinder 92 and extends to the outside of the fixed cylinder 92. One end of the rotating cylinder 94 is fixed... The rotating cylinder 94 is fixed at the bottom of the turntable 4, and the other end of the rotating cylinder 94 extends into the interior of the sliding cylinder 93 and is axially and slidably connected to the sliding cylinder 93. The fixed cylinder 92, the sliding cylinder 93 and the rotating cylinder 94 are connected in sequence. The air pump 95 is installed on the base 91, and the output end of the air pump 95 extends into the fixed cylinder 92 and delivers gas into the fixed cylinder 92. A motor is installed on one side of the bottom of the turntable 4, and the output end of the motor is connected to the gear transmission assembly. The gear transmission assembly is rotatably set at the bottom of the turntable 4 and is connected to the rotating cylinder 94 through a gear ring drive.

[0048] When the turntable 4 needs to be raised or lowered, the air pump 95 is activated to supply gas into the fixed cylinder 92. The gas then enters the sliding cylinder 93 and the rotating cylinder 94 in sequence. Since the fixed cylinder 92, the sliding cylinder 93, and the rotating cylinder 94 are interconnected and axially sealed, under the action of gas pressure, the sliding cylinder 93 and the rotating cylinder 94 will drive the turntable 4 to move axially, thereby realizing the raising and lowering operation of the turntable 4. In addition, sealing rings are provided at the connection points between the sliding cylinder 93 and the rotating cylinder 94, as well as between the sliding cylinder 93 and the fixed cylinder 92, to ensure that gas does not leak during sliding or rotation, thus ensuring the stability and reliability of the drive mechanism 9.

[0049] Simultaneously, the motor drives the gear transmission assembly to rotate, which in turn drives the rotating cylinder 94 to rotate, thereby enabling the turntable 4 to rotate so that the cooling control device 8 can perform all-round cooling of the valve body 41. Specifically, the gear transmission assembly includes a gear ring and a gear. The gear ring is fixedly sleeved on the outer wall of the rotating cylinder 94, and the gear is rotatably mounted on one side of the bottom of the turntable 4 via a rotating shaft, with the gear meshing with the gear ring. The motor is mounted on one side of the bottom of the turntable 4 via a bracket, and the output end of the motor is coaxially connected to the gear. This gear transmission assembly is existing technology, and any existing device or mechanism that can drive the rotating cylinder 94 to rotate can be used for the motor and gear transmission assembly. Therefore, no reference numerals are provided in the figure.

[0050] Two symmetrically arranged receiving grooves for the rotating cylinder 94 to pass through are provided on a set of sealing doors 15 used to close the entry hole 14. The two receiving grooves are combined to form a circular groove 19. A support rod 20 is fixedly connected at the middle position of the top of the turntable 4. A disc 21 is fixedly connected to the top of the support rod 20. The disc 21 is adapted to the circular groove 19.

[0051] When the turntable 4 descends onto the chassis 81, the set of sealing doors 15 closes the inlet hole 14, and the disc 21 closes the circular groove 19 on the set of sealing doors 15.

[0052] When the turntable 4 needs to rise for operation, the sealing door 15 is open. The drive mechanism 9 drives the turntable 4 upward into the buffer zone 11, causing the turntable 4 to move above the sealing door 15. The rotating cylinder 94 passes through the inlet hole 14, at which point the sealing door 15 is closed. When the sealing door 15 is closed, the circular groove 19 fits tightly with the rotating cylinder 94, effectively preventing gas flow. When the turntable 4 needs to descend into the cooling zone 12, the circular groove 19 is in a hollow state. By setting the support rod 20 and the disc 21, when the turntable 4 descends onto the chassis 81, the disc 21 fits with the circular groove 19, which can seal the circular groove 19. This satisfies the driving and rotation requirements of the turntable 4, and through the cooperation of the sealing door 15 and the disc 21, the inlet hole 14 is effectively sealed when the turntable 4 descends, improving the sealing performance and stability of the device.

[0053] Fans 22 are installed on both sides of the outer wall of the cooling box 2. The input end of the fan 22 is connected to the air inlet pipe 23, and the output end of the fan 22 is connected to the exhaust pipe 24. The air inlet pipe 23 passes through the cooling box 2 and extends to the buffer zone 11. The exhaust pipe 24 passes through the insulation box 1 and extends to the inner wall of the insulation box 1. The exhaust pipe 24 is directed towards the 3D camera 7.

[0054] During the lifting and lowering of the turntable 4, as the sealing door 15 opens and closes, the gas in the insulation box 1 and cooling box 2 enters the buffer zone 11 through the through hole 3, the through hole 13 and the inlet hole 14. Therefore, by setting up the fan 22, the fan 22 draws relatively low-temperature air from the buffer zone 11 through the air inlet pipe 23. After being accelerated by the fan 22, this air is transported to the inner wall of the insulation box 1 through the exhaust pipe 24. Since the exhaust pipe 24 faces the 3D camera 7, it can directly regulate the air environment around the 3D camera 7, which helps to maintain the appropriate temperature required for the operation of the 3D camera 7, ensures that the 3D camera 7 works normally under stable temperature conditions, and avoids the performance and shooting quality of the 3D camera 7 due to excessively high or low temperatures. This, in turn, ensures the accuracy and reliability of the entire ceramic valve high-precision heat distribution device in monitoring and other aspects.

[0055] A heat-dispensing process for a high-precision heat-dispensing device for ceramic valves includes the following steps:

[0056] S1. The inner diameter of the valve body 41 is slightly smaller than the outer diameter of the valve body liner 42. Place the valve body 41 on the turntable 4 and start the cylinder 6 to move the partition heating device 5 down and sleeve it on the outside of the valve body 41.

[0057] S2. Start the zone heating device 5. Control the heating temperature and speed of heating elements 52 at different positions through the zone heating device 5. Equip infrared temperature sensors 54 at different positions to monitor the temperature difference at various points of valve body 41 or flange in real time.

[0058] S3. After the valve body 41 is heated to the set temperature in the heat preservation box 1, the inner hole of the valve body 41 expands and drives the turntable 4 to descend through the drive mechanism 9. When the turntable 4 descends and drives the valve body 41 to descend into the buffer zone 11, the inductive position sensor 18 senses the descending position of the turntable 4 and transmits the signal to the control component 16. The control component 16 drives the set of sealing doors 15 connected to it to close the through hole 13. Then, another set of control components 16 drives the set of sealing doors 15 connected to it to open. The turntable 4 continues to descend into the cooling zone 12 and is located on the chassis 81.

[0059] S4. Place the valve body liner 42 at room temperature inside the expanded valve body 41. Cool the valve body 41 by using the cooling control device 8 to achieve uniform cooling of the valve body 41. Once the valve body 41 has cooled to room temperature, its size shrinks and forms a tight interference fit with the valve body liner 42.

[0060] This invention utilizes a zoned heating device 5 to adjust the heating temperature at each location based on real-time temperature monitoring results. Simultaneously, a 3D camera 7 scans and records the thermal deformation dimensions at different stages. Through extensive thermal integration data, the relationship between temperature and thermal deformation dimensions is generated and continuously optimized, providing data support for continuous parameter optimization of the thermal integration process. By setting airflow nozzles 84, the differences in cooling rates for parts of varying thicknesses are compensated for, achieving consistent overall temperature drop across the parts. This reduces micro-deformation of metal parts caused by thermal stress due to temperature differences, improves dimensional consistency after cooling and shrinkage, and further enhances the accuracy and strength of the thermal integration process.

[0061] Specifically, due to the same size but different materials, parts under the same temperature difference... The expansion amounts (e.g., when both are heated to 100℃) are different, meaning their coefficients of linear expansion are different. Therefore, the required micro-deformation of the metal part can be calculated based on the preload force required for the metal part to hold the ceramic part, using the following thermal distribution data. The thermal distribution data is shown in the table below:

[0062]

[0063] In the data in the table above, "~" indicates an approximate value. Represents Poisson's ratio. Indicates the elastic modulus. This represents the coefficient of linear expansion; "*" indicates a multiplication operation. Indicates the minimum heating temperature. Actual heating temperature This indicates the final pressure of combination. Indicates ambient temperature. Indicates the outer diameter of the ceramic part. This represents the coefficient of linear expansion of stainless steel. This indicates the design interference.

[0064] It is worth noting that the following three steps should be followed when performing thermal design:

[0065] 1. Determine the parameters:

[0066] This includes: the coefficient of linear expansion of metal parts, the coefficient of linear expansion of ceramic parts, and the outer diameter of ceramic parts. Design interference Ambient temperature ;

[0067] 2. Calculate the minimum heating temperature :

[0068] The purpose of heating the metal part is to ensure that its inner diameter expands by at least equal to the design interference. Assumption: Outer diameter of ceramic part Design interference ,but:

[0069] ,

[0070] in addition If we set it to 20℃, then the minimum heating temperature is... ;

[0071] 3. Determine the actual heating temperature:

[0072] Considering the heat loss during the heating process, the final actual heating temperature is generally 30℃~50℃ higher than the minimum heating temperature.

[0073] The above heat-fitting data and calculation formulas are provided as an example. Following these three steps, the preload force for the metal part (valve body 41) to press against the ceramic part (valve body liner 42) after heat-fitting can be accurately designed. According to the formula... Based on the required pressure value, derive the design interference. The outer diameter of the ceramic part (valve body liner 42) is D, and the inner diameter of the metal part (valve body 41) is... .

[0074] At room temperature, the 3D camera 7 captures a size, and then at 200℃, the 3D camera 7 captures another size. The expansion rate is then calculated according to the formula, which is the coefficient of linear expansion.

[0075] The coefficient of linear expansion refers to the coefficient by which a solid expands along its length when the temperature increases. It is defined as the ratio of the relative elongation of the solid caused by a temperature change to the initial length and the amount of temperature change. The formula is: ;

[0076] The length change of a solid when heated follows ,in Elongation For the initial length, and , where represents the temperature before and after the change, respectively.

[0077] Compared to existing technologies, traditional heat fitting processes simply involve setting a temperature value, placing the valve body 41 in a container for heating, and then removing it for cooling, lacking precise calculations. This application, through precise calculation of the aforementioned heat fitting data, can accurately determine the coefficient of thermal expansion and precisely control the expansion of the part based on this. Furthermore, combined with real-time feedback from the 3D camera 7 on the dimensions of the valve body 41, the control process is more precise and stable, thereby achieving stable control of the ceramic clamping force.

[0078] The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A high-precision thermal matching device for ceramic valves, comprising a heat preservation box (1) and a cooling box (2), wherein the heat preservation box (1) is fixedly arranged at the top center of the cooling box (2), characterized in that, The heat preservation box (1) is provided with a through hole (3) communicated with the cooling box (2) at the bottom, and is internally provided with a rotary table (4) for bearing a valve body (41) and a valve body lining (42), a partition heating device (5) for partition heating of the valve body (41), two air cylinders (6) for driving the partition heating device (5) to lift and fall, and a 3D camera (7) for detecting the heating state of the valve body (41), the rotary table (4) is arranged in the through hole (3), the valve body (41) is arranged on the rotary table (4), the 3D camera (7) is fixed on the inner top wall of the heat preservation box (1) through a support and is located directly above the valve body (41), the partition heating device (5) is sleeved outside the rotary table (4) and is coaxial with the rotary table (4), the two air cylinders (6) are symmetrically arranged on the inner top wall of the heat preservation box (1) and the driving ends of the two air cylinders (6) are fixedly connected with the top of the partition heating device (5), and the cooling box (2) is internally provided with a cooling control device (8) and a driving mechanism (9) for driving the rotary table (4) to lift and fall and pass through the through hole (3) into the cooling box (2). The partition heating device (5) comprises a fixed plate (51), a plurality of heating fins (52), a heating fin support (53), a plurality of infrared temperature sensors (54) and a plurality of sensor supports (55), the fixed plate (51) is located above the through hole (3) and is fixedly connected with the driving shafts of the two air cylinders (6), the outer dimension of the fixed plate (51) is matched with the outer dimension of the valve body (41), the plurality of heating fins (52) are uniformly arranged along the outer dimension of the fixed plate (51), the plurality of infrared temperature sensors (54) are respectively arranged between adjacent two heating fins (52), all the heating fins (52) are fixedly installed on the bottom of the fixed plate (51) through the plurality of heating fin supports (53), and all the infrared temperature sensors (54) are fixedly installed on the bottom of the fixed plate (51) through the plurality of sensor supports (55).

2. The high-precision thermal matching device for ceramic valves according to claim 1, characterized in that: The cooling box (2) is internally horizontally provided with a partition plate (10), the partition plate (10) divides the cooling box (2) into a buffer area (11) and a cooling area (12), the cooling box (2) is provided with a through hole (13) communicated with the through hole (3) at the top, the partition plate (10) is provided with an access hole (14) for communicating the buffer area (11) and the cooling area (12), the through hole (3), the through hole (13) and the access hole (14) are coaxial, and the buffer area (11) is further provided with two groups of sealing doors (15) for closing the through hole (13) and the access hole (14) and a plurality of control assemblies (16) for controlling the opening and closing of the two groups of sealing doors (15).

3. The high-precision thermal matching device for ceramic valves according to claim 2, characterized in that: The cooling control device (8) is arranged in the cooling area (12), and the cooling control device (8) comprises a base plate (81), a plurality of supporting legs (82), an infrared temperature measurement camera (83), a nozzle (84), a camera support (85) for fixing the infrared temperature measurement camera (83), and an adjusting assembly for adjusting the moving position of the nozzle (84). The base plate (81) is fixed on the inner bottom of the cooling box (2) through the plurality of supporting legs (82). The base plate (81) is a hollow circular ring, and the base plate (81) is located directly below and coaxial with the entrance hole (14). The infrared temperature measurement camera (83) is fixed on one side of the top of the base plate (81) through the camera support (85). The adjusting assembly is installed on one side of the top of the base plate (81) close to the infrared temperature measurement camera (83). The nozzle (84) is installed on the adjusting assembly.

4. The high-precision thermal matching device for ceramic valves according to claim 3, characterized in that: The adjusting assembly comprises a vertical electric sliding table (86), a horizontal electric sliding table (87), a sliding table support (88), a transition plate (89), and a nozzle support (90). The vertical electric sliding table (86) is fixed on the upper surface of the base plate (81) through the sliding table support (88). The transition plate (89) is fixed on the sliding surface of the vertical electric sliding table (86). The horizontal electric sliding table (87) is installed on the transition plate (89). The nozzle support (90) is installed on the sliding table surface of the horizontal electric sliding table (87). The nozzle (84) is fixed on the nozzle support (90). The nozzle (84) faces the rotation center of the turntable (4), and the nozzle (84) can be translated in the vertical and horizontal directions.

5. The ceramic valve high-precision thermal matching device according to claim 3, characterized in that: The driving mechanism (9) comprises a base (91), a fixed cylinder (92), a sliding cylinder (93), a rotating cylinder (94), a gas pump (95), and a gear transmission assembly for driving the rotating cylinder (94) to rotate. The base (91) is fixedly arranged on the inner bottom wall of the cooling box (2). The fixed cylinder (92) is fixedly arranged at the axial position of the base (91) and coaxial with the turntable (4). The sliding cylinder (93) is axially and sealingly arranged in the fixed cylinder (92) and extends to the outside of the fixed cylinder (92). One end of the rotating cylinder (94) is fixed to the bottom of the turntable (4), and the other end of the rotating cylinder (94) extends into the sliding cylinder (93) and is axially and sealingly connected with the sliding cylinder (93). The fixed cylinder (92), the sliding cylinder (93), and the rotating cylinder (94) are sequentially communicated. The gas pump (95) is installed on the base (91), and the output end of the gas pump (95) extends into the fixed cylinder (92) and delivers gas into the fixed cylinder (92). A motor is installed on one side of the bottom of the turntable (4). The output end of the motor is connected with the gear transmission assembly. The gear transmission assembly is rotationally arranged at the bottom of the turntable (4) and is drivingly connected with the rotating cylinder (94) through a gear ring.

6. The ceramic valve high-precision thermal matching device according to claim 2, characterized in that: The partition plate (10) is fixedly connected with a mounting plate (17), the control assembly (16) is provided with a plurality of control assemblies (16) which are symmetrically arranged on the mounting plate (17) and are respectively in transmission connection with each sealing door (15), and an inductive position sensor (18) is arranged on one side of the mounting plate (17) close to the access hole (14) and is electrically connected with the plurality of control assemblies (16).

7. The ceramic valve high-precision thermal matching device according to claim 5, characterized in that: A group of sealing doors (15) for closing the access hole (14) are symmetrically provided with two accommodating grooves for the rotating cylinder (94) to pass through, and the two accommodating grooves are combined into a circular groove (19), a supporting rod (20) is fixedly connected to the middle position of the top of the rotating table (4), and a disc (21) is fixedly connected to the top of the supporting rod (20) and is matched with the circular groove (19). When the rotating table (4) is lowered onto the bottom disc (81), the group of sealing doors (15) close the access hole (14), and the disc (21) closes the circular groove (19) on the group of sealing doors (15).

8. The ceramic valve high-precision thermal matching device according to claim 5, characterized in that: Fan (22) is installed on both sides of the outer wall of the cooling box (2), the input end of the fan (22) is connected with the air inlet pipe (23), the output end of the fan (22) is connected with the air outlet pipe (24), the air inlet pipe (23) extends through the cooling box (2) to the buffer area (11), the air outlet pipe (24) extends through the inner wall of the heat preservation box (1) to the heat preservation box (1), and the air outlet pipe (24) faces the 3D camera (7).

9. A thermal matching process applied to the high-precision thermal matching device of the ceramic valve according to claim 6, characterized in that: The method comprises the following steps: S1, the inner hole of the valve body (41) is slightly smaller than the outer circle of the valve body lining (42), the valve body (41) is placed on the rotating table (4), and the air cylinder (6) is started to lower the partition heating device (5) and set it outside the valve body (41); S2, start the partition heating device (5), control the temperature and speed of the heating pieces (52) at different positions through the partition heating device (5), and equip infrared temperature sensors (54) at different positions to monitor the temperature difference of each point of the valve body (41) in real time; S3, after the valve body (41) is heated to the set temperature in the heat preservation box (1), the inner hole of the valve body (41) expands, the rotating table (4) is driven to descend by the driving mechanism (9), when the rotating table (4) descends and drives the valve body (41) to descend into the buffer area (11), the inductive position sensor (18) senses the descending position of the rotating table (4), transmits a signal to the control assembly (16), and drives a group of sealing doors (15) connected with the control assembly (16) to close the through hole (13) through a group of control assemblies (16), then drives another group of control assemblies (16) to open a group of sealing doors (15) connected with the control assembly (16), and the rotating table (4) continues to descend into the cooling area (12) and is located on the bottom disc (81). S4, the valve body lining (42) at room temperature is placed in the expanded valve body (41), the valve body (41) is cooled by the cooling control device (8), the uniform cooling of the valve body (41) is realized, the valve body (41) is cooled to room temperature, and the valve body (41) size contraction forms the interference fit of the close covering with the valve body lining (42).

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