Automatic extraction device for graphite furnace tube in vertical deposition furnace

Abstract

The invention provides an automatic extraction device for a graphite furnace tube in a vertical deposition furnace. The automatic extraction device comprises a rack, a lifting frame, a three-stage telescopic arm, a pneumatic expansion claw and a three-stage telescopic arm driving assembly. And the lifting frame is connected above the supporting surface of the rack. The upper end of the third-level telescopic arm is connected with the lifting frame, the lower end of the third-level telescopic arm is connected with the pneumatic expansion claw, and the third-level telescopic arm is located on the side edge of the machine frame. And the third-stage telescopic arm driving assembly is connected with the third-stage telescopic arm. And the pneumatic expansion claws are controlled by compressed air. And the third-stage telescopic arm is configured to be adjustable in length and is used for moving the pneumatic expansion claw onto the graphite furnace tube. And the pneumatic expansion claw is used for grabbing the graphite furnace tube. According to the automatic extraction device, the lifting frame, the three-stage telescopic arm, the pneumatic expansion claw and the three-stage telescopic arm driving assembly in the automatic extraction device are mutually matched for operation, so that the problems that the labor intensity is high, dust pollution is large, and the graphite furnace tube is prone to being squeezed, collided and damaged when the graphite furnace tube in the deposition furnace is manually extracted are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of high-temperature gas-cooled reactors, and in particular relates to an automated extraction device for graphite furnace tubes in a vertical deposition furnace. Background Art

[0002] The outstanding feature of the high-temperature gas-cooled reactor is its inherent safety characteristics. The all-ceramic TRISO coated fuel particles it uses are the first barrier to its inherent safety characteristics. The preparation of coated fuel particles requires the use of chemical vapor deposition technology, involving vertical deposition furnace equipment.

[0003] In the process of producing coated fuel particles in the deposition furnace, the graphite furnace tube in the furnace will also be affected by chemical vapor deposition and deposits will be attached. As the number of coatings increases, the deposits on the graphite furnace tube wall gradually become thicker, affecting the quality and efficiency of the coated particle preparation. Therefore, the deposits on the graphite furnace tube need to be cleaned.

[0004] At present, the cleaning of graphite furnace tubes in deposition furnaces is mainly done manually, that is, the graphite furnace tubes are manually moved out of the deposition furnace, and the furnace wall is cleaned by blowing with a vacuum cleaner and a scraper. Manual cleaning has the following problems: 1. In the process of moving the graphite furnace tubes out of the deposition furnace, the space is limited, and it is easy to squeeze and collide, causing damage to the furnace tube; 2. Sediments adhere to the furnace wall, causing dust pollution when moving out. Summary of the invention

[0005] In view of this, the embodiment of the present application is dedicated to providing an automated extraction device for graphite furnace tubes in a vertical deposition furnace. By utilizing the coordinated operation of a lifting frame, a three-stage telescopic arm, a pneumatic expansion claw and a three-stage telescopic arm drive assembly in the automated extraction device, the problems of high labor intensity, high dust pollution and easy squeezing, collision and damage of graphite furnace tubes in manual extraction of graphite furnace tubes in a deposition furnace can be solved.

[0006] The present application provides an automated extraction device for a graphite furnace tube in a vertical deposition furnace, wherein the vertical deposition furnace includes a graphite furnace tube, and the automated extraction device for a graphite furnace tube in a vertical deposition furnace includes a frame, a lifting frame, a three-stage telescopic arm, a pneumatic expansion claw, and a three-stage telescopic arm drive assembly. The lifting frame is connected above the support surface of the frame and is used to lift or lower the three-stage telescopic arm. The upper end of the three-stage telescopic arm is connected to the lifting frame, the lower end of the three-stage telescopic arm is connected to the pneumatic expansion claw, and the three-stage telescopic arm is located on the side of the frame. The three-stage telescopic arm drive assembly is connected to the three-stage telescopic arm and is used to drive the three-stage telescopic arm to move up and down. The pneumatic expansion claw is controlled by compressed air. The three-stage telescopic arm is configured to be adjustable in length and is used to move the pneumatic expansion claw onto the graphite furnace tube. The pneumatic expansion claw is used to grab the graphite furnace tube.

[0007] In a specific embodiment of the present application, the automatic extraction device for graphite furnace tubes in a vertical deposition furnace also includes a temporary storage seat for graphite furnace tubes. The temporary storage seat for graphite furnace tubes is connected below the support surface of the frame. The lifting frame includes a positioning sensor. The positioning sensor is used to locate the docking of the graphite furnace tube and the temporary storage seat for graphite furnace tubes. The three-stage telescopic arm is movably connected to the lifting frame.

[0008] In a specific embodiment of the present application, the vertical deposition furnace further includes a gas distributor connected to the graphite furnace tube. The automated extraction device for the graphite furnace tube in the vertical deposition furnace further includes a vacuum adsorption plate. The vacuum adsorption plate is connected to the pneumatic expansion claw and is controlled by compressed air. The three-stage telescopic arm is also used to move the vacuum adsorption plate onto the graphite furnace tube.

[0009] In a specific embodiment of the present application, the three-stage telescopic arm includes a basic arm, a first-stage telescopic arm and a second-stage telescopic arm. The first-stage telescopic arm is slidably nested in the basic arm, and the second-stage telescopic arm is slidably nested in the first-stage telescopic arm.

[0010] In a specific embodiment of the present application, the pneumatic expansion claw includes a pneumatic cylinder, a piston rod, a transmission mechanism, a control valve and a clamping claw. The pneumatic cylinder is connected to the piston rod, and the piston rod is connected to the clamping claw. The transmission mechanism is used to convert the movement of the piston rod into a clamping or releasing action of the clamping claw. The piston rod is used to drive the clamping claw to move when moving in the pneumatic cylinder. The control valve is connected to the pneumatic cylinder and is used to adjust the air pressure and flow rate in the pneumatic cylinder.

[0011] In a specific embodiment of the present application, the vacuum adsorption cup includes a suction cup, a suction cup frame and a sealing ring. A plurality of small holes are distributed under the suction cup and connected to a pipe of the suction cup frame to achieve the transmission of vacuum suction. The sealing ring is used to ensure the sealing between the suction cup and the object to be lifted.

[0012] In a specific embodiment of the present application, the lifting frame includes a motor, a shaft and a reducer. The motor is connected to the reducer through the shaft. The reducer is transmitted to the lifting frame through a gear or a chain.

[0013] The beneficial effect of the technical solution of the present application is that by adjusting the length of the three-stage telescopic arm, the pneumatic expansion claw can be moved and tightly attached to the appropriate position on the graphite furnace tube. The pneumatic expansion claw can be used to effectively grasp the graphite furnace tube, thereby realizing automatic extraction of the graphite furnace tube in the vertical deposition furnace, reducing the collision of the graphite furnace tube and the gas distributor on the deposition furnace, reducing the breakage rate, and also improving the grasping efficiency and the long-term use stability of the furnace tube, and can reduce dust pollution, improve the efficiency of subsequent transportation and cleaning, and at the same time reduce manual labor intensity and save labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1Shown is a schematic structural diagram corresponding to an automated extraction device for graphite furnace tubes in a vertical deposition furnace provided by an embodiment of the present application when extracting graphite furnace tubes.

[0015] Figure 2 Shown is a partially enlarged structural schematic diagram of an automated extraction device for a graphite furnace tube in a vertical deposition furnace provided in one embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] At least one embodiment of the present application provides an automated extraction device for a graphite furnace tube in a vertical deposition furnace. Figure 1 and Figure 2 , a vertical deposition furnace 10 includes a graphite furnace tube 9. The automated extraction device for the graphite furnace tube in the vertical deposition furnace includes a frame 1, a lifting frame 3, a three-stage telescopic arm 4, a pneumatic expansion claw 5 and a three-stage telescopic arm drive assembly 8. The lifting frame 3 is connected above the support surface of the frame 1, and is used to lift or lower the three-stage telescopic arm 4. The upper end of the three-stage telescopic arm 4 is connected to the lifting frame 3, and the lower end of the three-stage telescopic arm 4 is connected to the pneumatic expansion claw 5, and the three-stage telescopic arm 4 is located on the side of the frame 1. The three-stage telescopic arm drive assembly 8 is connected to the three-stage telescopic arm 4, and is used to drive the three-stage telescopic arm 4 to move up and down. The pneumatic expansion claw 5 is controlled by compressed air. The three-stage telescopic arm 4 is configured to be adjustable in length, and is used to move the pneumatic expansion claw 5 onto the graphite furnace tube 9. The pneumatic expansion claw 5 is used to grab the graphite furnace tube 9.

[0018] For example, in some embodiments, the lifting frame 3 is fixed to the frame 1 via a tripod support, and the frame 1 is fixed to the platform via bolts.

[0019] The automated extraction device for graphite furnace tubes in a vertical deposition furnace provided in the embodiment of the present application can move the pneumatic expansion claw 5 and fit it tightly to a suitable position on the graphite furnace tube by adjusting the length of the three-stage telescopic arm 4. The pneumatic expansion claw 5 can be used to effectively grasp the graphite furnace tube 9, thereby realizing automatic extraction of the graphite furnace tube in the vertical deposition furnace, reducing the collision of the graphite furnace tube and the gas distributor on the deposition furnace, reducing the breakage rate, and also improving the grasping efficiency and the long-term stability of the furnace tube, and can reduce dust pollution, thereby improving the efficiency of subsequent transportation and cleaning, and at the same time reducing the intensity of manual labor and saving labor costs.

[0020] In at least one embodiment of the present application, the automated extraction device for graphite furnace tubes in a vertical deposition furnace also includes a graphite furnace tube temporary storage seat 2. The graphite furnace tube temporary storage seat 2 is connected below the support surface of the frame 1. The lifting frame 3 includes a positioning sensor. The positioning sensor is used to locate the docking of the graphite furnace tube and the graphite furnace tube temporary storage seat. The three-stage telescopic arm 4 is movably connected to the lifting frame 3. In this way, by adding a graphite furnace tube temporary storage seat 2 and a positioning sensor, and setting a three-stage telescopic arm 4 to be movably connected to the lifting frame 3, the three-stage telescopic arm 4 can be moved up and down relative to the lifting frame 3 to achieve rotational movement, and the graphite furnace tube 9 is transferred to the graphite furnace tube temporary storage seat 2. The positioning sensor can be used to accurately locate the docking of the graphite furnace tube and the graphite furnace tube temporary storage seat, so that the graphite furnace tube 9 can be accurately positioned on the graphite furnace tube temporary storage seat 2 after being extracted, thereby reducing the probability of the graphite furnace tube 9 colliding with the vertical deposition furnace 10 and reducing the breakage rate.

[0021] For example, in some embodiments, the frame 1 and the graphite furnace tube temporary storage seat 2 are fixed by bolts.

[0022] In at least one embodiment of the present application, the vertical deposition furnace 10 also includes a gas distributor 7 connected to the graphite furnace tube 9. The automated extraction device for the graphite furnace tube in the vertical deposition furnace also includes a vacuum adsorption plate 6. The vacuum adsorption plate 6 is connected to the pneumatic expansion claw 5 and is controlled by compressed air. The three-stage telescopic arm 4 is also used to move the vacuum adsorption plate 6 to the graphite furnace tube. In this way, by adding the vacuum adsorption plate 6, the vacuum adsorption plate 6 can effectively adsorb the gas distributor 7, thereby realizing the extraction of the gas distributor 7 using the vacuum adsorption plate 6, and avoiding the gas distributor 7 from falling and being damaged during the extraction of the graphite furnace tube 9.

[0023] For example, the end of the three-stage telescopic arm 4 is equipped with a pneumatic expansion claw 5 and a vacuum adsorption plate 6 for closely extracting the graphite furnace tube 9 and the gas distributor 7.

[0024] In at least one embodiment of the present application, the three-stage telescopic arm 4 includes a basic arm, a first-stage telescopic arm and a second-stage telescopic arm. The first-stage telescopic arm is slidably nested in the basic arm, and the second-stage telescopic arm is slidably nested in the first-stage telescopic arm. In this way, the three-stage telescopic arm 4 is composed of a plurality of nested structures, each of which is composed of an inner sleeve and an outer sleeve, and telescopic movement is achieved through hydraulic or spiral or pulley mechanical actions. The inner sleeve is connected to the outer sleeve through a spiral screw or pulley device of the outer sleeve, and the length of the telescopic arm is changed by rotating or pulling the inner sleeve.

[0025] In at least one embodiment of the present application, the pneumatic expansion claw 5 includes a pneumatic cylinder, a piston rod, a transmission mechanism, a control valve and a clamping claw. The pneumatic cylinder is connected to the piston rod, and the piston rod is connected to the clamping claw. The transmission mechanism is used to convert the movement of the piston rod into a clamping or releasing action of the clamping claw. The piston rod is used to drive the clamping claw to move when moving in the pneumatic cylinder. The control valve is connected to the pneumatic cylinder and is used to adjust the air pressure and flow rate in the pneumatic cylinder. In this way, the opening and closing of the clamping claw is achieved by driving the pneumatic cylinder, the piston rod, the transmission mechanism and the control valve, and the air pressure and flow rate in the pneumatic cylinder are adjusted by the control valve to achieve precise control of the clamping force of the clamping claw.

[0026] In at least one embodiment of the present application, the vacuum adsorption plate 6 includes a suction cup, a suction cup frame and a sealing ring. A certain number of small holes are distributed under the suction cup and connected to the pipe of the suction cup frame to achieve the transmission of vacuum suction. The sealing ring is used to ensure the sealing between the suction cup and the object to be lifted.

[0027] The working principle of the vacuum suction cup is based on vacuum technology. When the vacuum suction cup contacts the object to be lifted, it is connected to the vacuum equipment through the pipe, and the vacuum equipment is started to suck, so that negative air pressure is generated in the suction cup. Due to the pressure difference between the inside and outside of the suction cup, the suction cup can firmly suck the object to be lifted, so as to carry or move it. When the object to be lifted reaches the designated position, the vacuum suction cup is steadily inflated, so that the air pressure in the suction cup gradually increases to zero pressure or slightly positive pressure. At this time, the vacuum suction cup can easily detach from the object to be lifted and complete the handling task.

[0028] It should be noted that the sealing ring not only ensures the sealing between the suction cup and the object to be lifted, but also prevents air leakage from causing a decrease in adsorption force.

[0029] In at least one embodiment of the present application, the lifting frame 3 includes a motor, a shaft and a reducer. The motor is connected to the reducer through the shaft. The reducer is transmitted to the lifting frame 3 through a gear or a chain. In this way, by using the motor to drive the reducer, and the reducer is then transmitted to the lifting frame 3 through a gear or a chain, the lifting and lowering movement of the object to be lifted is realized.

[0030] The following is a detailed description of the operation of the automatic extraction device for graphite furnace tubes in a vertical deposition furnace in conjunction with a specific implementation manner.

[0031] Embodiment 1: Automatically extracting the graphite furnace tube 9 using an automated extraction device for the graphite furnace tube in a vertical deposition furnace may specifically include the following steps.

[0032] First, the three-stage telescopic arm 4 goes deep into the furnace, and the pneumatic expansion claw 5 and the vacuum adsorption plate 6 of the gas distributor 7 firmly grasp the graphite furnace tube 9 and the gas distributor 7. Then, the lifting frame 3 extracts the graphite furnace tube 9 out of the furnace. After that, the lifting frame 3 transfers the graphite furnace tube 9 to the temporary storage position above the graphite furnace tube temporary storage seat 2 to facilitate equipment transportation. Further, the lifting frame 3 transfers the graphite furnace tube 9 to the graphite furnace tube temporary storage seat 2, and can also transfer the graphite furnace tube to the cleaning device for centralized cleaning.

[0033] Embodiment 2: Automatically extracting the graphite furnace tube 9 and the gas distributor 7 using an automated extraction device for the graphite furnace tube in a vertical deposition furnace may specifically include the following steps.

[0034] When the three-stage telescopic arm 4 goes deep into the graphite furnace tube 9, the pneumatic expansion claw 5 is pressed against the appropriate position of the graphite furnace tube 9 by the three-stage telescopic arm 4 to effectively grab the graphite furnace tube 9, and the gas distributor 7 is effectively adsorbed by the vacuum adsorption plate 6 to prevent the gas distributor 7 from falling, and then the lifting frame 3 extracts the graphite furnace tube. Finally, the lifting frame 3 transfers the graphite furnace tube to the top of the graphite furnace tube temporary storage seat 2 for easy transportation and cleaning.

[0035] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0036] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0038] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic extraction device for graphite furnace tubes in a vertical deposition furnace, characterized in that: The vertical deposition furnace includes a graphite furnace tube. The automatic extraction device for the graphite furnace tube in the vertical deposition furnace includes a frame, a lifting frame, a three-stage telescopic arm, a pneumatic expansion claw and a three-stage telescopic arm drive assembly. Among them, the lifting frame is connected above the supporting surface of the frame, and is used to lift or lower the three-stage telescopic arm; the upper end of the three-stage telescopic arm is connected to the lifting frame, and the lower end of the three-stage telescopic arm is connected to the pneumatic expansion claw, and the three-stage telescopic arm is located on the side of the frame; the three-stage telescopic arm driving assembly is connected to the three-stage telescopic arm, and is used to drive the three-stage telescopic arm to move up and down; the pneumatic expansion claw is controlled by compressed air; the three-stage telescopic arm is configured to be adjustable in length, and is used to move the pneumatic expansion claw onto the graphite furnace tube; the pneumatic expansion claw is used to grab the graphite furnace tube.

2. The automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to claim 1, characterized in that: It also includes a graphite furnace tube temporary storage seat, Among them, the graphite furnace tube temporary storage seat is connected below the support surface of the frame; the lifting frame includes a positioning sensor, and the positioning sensor is used to locate the docking of the graphite furnace tube and the graphite furnace tube temporary storage seat; the three-stage telescopic arm is movably connected to the lifting frame.

3. The automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to claim 1, characterized in that: The vertical deposition furnace further comprises a gas distributor connected to the graphite furnace tube, and the automatic extraction device for the graphite furnace tube in the vertical deposition furnace further comprises a vacuum adsorption plate. Among them, the vacuum adsorption plate is connected to the pneumatic expansion claw and is controlled by compressed air; the three-stage telescopic arm is also used to move the vacuum adsorption plate to the graphite furnace tube.

4. The automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to claim 1, characterized in that: The three-stage telescopic arm comprises a basic arm, a first-stage telescopic arm and a second-stage telescopic arm, wherein the first-stage telescopic arm is slidably nested in the basic arm, and the second-stage telescopic arm is slidably nested in the first-stage telescopic arm.

5. The automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to claim 1, characterized in that: The pneumatic expansion claw includes a pneumatic cylinder, a piston rod, a transmission mechanism, a control valve and a clamping claw, wherein the pneumatic cylinder is connected to the piston rod, the piston rod is connected to the clamping claw, the transmission mechanism is used to convert the movement of the piston rod into a clamping or releasing action of the clamping claw, and the piston rod is used to drive the clamping claw to move when moving in the pneumatic cylinder; the control valve is connected to the pneumatic cylinder and is used to adjust the air pressure and flow rate in the pneumatic cylinder.

6. The automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to claim 1, characterized in that: The vacuum adsorption cup includes a suction cup, a suction cup frame and a sealing ring, wherein a plurality of small holes are distributed under the suction cup and connected to the pipe of the suction cup frame to realize the transmission of vacuum suction force; the sealing ring is used to ensure the sealing between the suction cup and the object to be lifted.

7. An automatic extraction device for graphite furnace tubes in a vertical deposition furnace according to any one of claims 1 to 6, characterized in that: The lifting frame comprises a motor, a shaft and a reducer, wherein the motor is connected to the reducer through the shaft, and the reducer is transmitted to the lifting frame through gears or chains.

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