Automatic cover opening and closing device of reaction kettle and reaction kettle system

Abstract

The invention discloses an automatic cover opening and closing device for a reaction kettle and a reaction kettle system. The device comprises an up-down moving assembly and a rotary driving assembly, the up-down moving assembly comprises a moving plate and a power part; the rotary driving assembly is installed on the moving plate, and the power part is connected with the moving plate so as to drive the moving plate and the power part to move up and down; the rotary driving assembly comprises a driving structure and a driving shaft; the driving structure is connected with the driving shaft so that the driving structure can drive the driving shaft to rotate in the forward direction and the reverse direction. According to the device and the system, automatic operation and control of cover opening and cover closing of the high-temperature and high-pressure reaction kettle in the hot chamber can be realized, and the operation convenience of loading and unloading nuclear fuel elements in the reaction kettle by a manipulator is improved.

Description

Technical Field

[0001] The invention relates to the technical field of performance inspection of nuclear fuel elements after irradiation, and in particular to an automatic opening and closing cover device for a reactor and a reactor system. Background Art

[0002] The performance of nuclear fuel elements is directly related to the safety and economy of reactor operation. Once a nuclear fuel element is damaged, the radioactive fission products in it will be released into the primary coolant, causing the system's radioactivity level to increase. The performance analysis test of nuclear fuel elements after irradiation is of great significance for the comprehensive evaluation of the safety of reactor operation, and can provide data support for the development and improvement of corresponding nuclear fuel elements.

[0003] When conducting research and testing on irradiated nuclear fuel elements, they need to be placed in a sealed high-temperature and high-pressure reactor. Since the samples of nuclear fuel elements are highly radioactive after irradiation, the high-temperature and high-pressure reactor needs to be placed in a hot room for operation, and operators cannot get close to it, so it can only be done by operating a manipulator. However, it is difficult for the current manipulator to complete the opening and closing of the reactor cover in the vertical direction, so it is necessary to design a set of devices that can automatically open and close the cover to facilitate the manipulator to load and unload the fuel elements. Summary of the invention

[0004] In view of this, the present invention provides a reactor automatic cover opening and closing device and a reactor system, the main purpose of which is to solve the problem of inconvenient operation in the hot chamber during the process of loading and unloading nuclear fuel elements in the reactor by a manipulator.

[0005] According to one aspect of the present invention, there is provided a device for automatically opening and closing a lid of a reactor, comprising:

[0006] Up and down moving components and rotation driving components;

[0007] The up-and-down moving assembly includes a moving plate and a power unit; the rotation driving assembly is mounted on the moving plate, and the power unit is connected to the moving plate to drive the moving plate and the power unit to move up and down;

[0008] The rotary drive assembly includes a drive structure and a drive shaft; the drive structure is connected to the drive shaft so that the drive structure drives the drive shaft to rotate forward and reverse.

[0009] Optionally, the device further comprises a support bracket for fixing the reaction kettle;

[0010] The up-and-down moving assembly also includes a guide rod connected to the supporting bracket;

[0011] A linear ball guide sleeve is arranged on the movable plate, and the guide rod passes through the linear ball guide sleeve, so that the movable plate moves up and down along the guide rod.

[0012] Optionally, the rotary drive assembly further comprises a cylinder and a connecting bracket;

[0013] One end of the connecting bracket is connected to the movable plate;

[0014] A connecting hole is provided on the output shaft of the power unit, and a connecting hole is provided at the other end of the connecting bracket. When the power is on, the cylinder shaft of the cylinder is inserted into the two connecting holes to fix the power unit and the connecting bracket; when the power is off, the cylinder shaft slips out of the two connecting holes to separate the power unit and the connecting bracket.

[0015] Optionally, the driving structure includes a pneumatic motor and a reducer;

[0016] The pneumatic motor is connected to the input end of the reducer, and the drive shaft is connected to the output end of the reducer, so that the pneumatic motor drives the drive shaft to rotate forward and reverse through the reducer.

[0017] Optionally, the device further comprises a baffle assembly disposed above the reaction kettle;

[0018] The baffle assembly comprises a limiting sliding groove and a stopper, wherein the limiting sliding groove is arranged on both sides of the stopper, so that the stopper slides in the limiting sliding groove.

[0019] According to another aspect of the present invention, a reactor system is provided, comprising: an automatic opening and closing cover device for a reactor, a reactor and a control cabinet;

[0020] The driving shaft in the automatic opening and closing cover device of the reactor is connected to the first end of the reactor cover of the reactor, so that the driving shaft drives the reactor cover to rotate forward and reverse;

[0021] The control cabinet is wirelessly connected to the power unit and the driving structure in the automatic opening and closing cover device of the reactor, so that the control cabinet controls the start and stop and driving direction of the power unit and the driving structure.

[0022] Optionally, the first end is provided with a square portion, and the square portion is inserted into the hollow square hole of the drive shaft; the second end of the kettle cover is provided with a hook, and a hanging basket for loading nuclear fuel elements is suspended by the hook.

[0023] Optionally, a kettle cover pin hole is provided on the square portion, and an axis waist-shaped groove is provided on the driving shaft, so that the kettle cover can be installed and removed by means of a positioning pin provided in the kettle cover pin hole and the axis waist-shaped groove.

[0024] Optionally, an elastic component is sleeved on the outer wall of the square portion.

[0025] Optionally, a heat insulation pad is provided on the fitting surface between the driving shaft and the kettle cover.

[0026] By means of the above technical solution, the technical solution provided by the embodiment of the present invention has at least the following advantages:

[0027] The present invention provides an automatic opening and closing device for a reactor cover and a reactor system. Compared with the prior art, the present invention provides a driving force for up and down movement through an up and down moving component, and a driving force for forward and reverse rotation through a rotating driving component, so as to realize the automatic operation and control of opening and closing the cover of a high-temperature and high-pressure reactor in a hot chamber. After the reactor cover is opened, the fuel element loading tool can be lifted to the manipulator operable area, so that the fuel element can be loaded and unloaded by the manipulator, and all manipulator operations in the hot chamber can be realized.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] Figure 1 The overall structure schematic diagram of an automatic opening and closing cover device for a reactor provided by an embodiment of the present invention is shown;

[0031] Figure 2 The overall structure front view of an automatic opening and closing cover device for a reactor provided by an embodiment of the present invention is shown;

[0032] Figure 3 A side view of the overall structure of an automatic opening and closing cover device for a reactor provided by an embodiment of the present invention is shown;

[0033] Figure 4 A top view of the overall structure of an automatic opening and closing cover device for a reactor provided by an embodiment of the present invention is shown;

[0034] Figure 5 A partial schematic diagram of a drive shaft provided by an embodiment of the present invention is shown;

[0035] Figure 6A partial schematic diagram of the connection between the drive shaft and the kettle cover provided by an embodiment of the present invention is shown;

[0036] Among them, 1-power unit; 2-moving plate; 3-guide rod; 4-linear ball guide sleeve; 5-cylinder; 6-connecting bracket; 7-pneumatic motor; 8-reducer; 9-driving shaft; 10-elastic component; 11-kettle cover; 12-hanging basket; 13-baffle assembly; 14-support bracket; 15-reactor; 16-rotating drive assembly; 17-hollow square hole in the driving shaft; 18-shaft waist groove; 19-locating pin; 20-hook; 21-thermal insulation pad. DETAILED DESCRIPTION

[0037] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0038] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0039] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0040] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0041] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0042] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0043] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0044] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0045] The embodiment of the present invention provides a device for automatically opening and closing the lid of a reactor, such as Figures 1 to 4 As shown, the device includes: an up and down moving component and a rotation driving component 16; the up and down moving component includes a moving plate 2 and a power unit 1; the rotation driving component 16 is installed on the moving plate 2, and the power unit 1 is connected to the moving plate 2 to drive the moving plate 2 and the power unit 1 to move up and down; the rotation driving component 16 includes a driving structure and a driving shaft 9; the driving structure is connected to the driving shaft 9 so that the driving structure drives the driving shaft 9 to rotate forward and reverse.

[0046] In an embodiment of the present invention, the up-and-down moving assembly of the automatic opening and closing cover device of the reactor provides power for the up-and-down movement of the rotary drive assembly 16, wherein the rotary drive assembly 16 is installed on the movable plate 2 of the up-and-down moving assembly, and the power unit 1 in the up-and-down moving assembly is connected to the movable plate 2. When the power unit 1 provides an upward pulling force, the movable plate 2 is pulled upward by the upward pulling force, so that the rotary drive assembly 16 installed thereon also moves upward; when the power unit 1 provides a downward force, the movable plate 2 moves downward under the action of the downward force, so that the rotary drive assembly 16 installed thereon also moves downward. In an embodiment of the present invention, the power unit 1 is preferably an electric servo cylinder. The driving structure in the rotary drive assembly 16 of the device provides a driving force for forward rotation and reverse rotation, and the driving force drives the driving shaft 9 connected thereto to rotate forward and reverse.

[0047] Based on the above embodiments, Figures 1 to 4 As shown, in order to enable the movable plate to move more accurately above the reactor, the device also includes a support bracket 14 for fixing the reactor 15; the up and down moving assembly also includes a guide rod 3 connected to the support bracket 14; a linear ball guide sleeve 4 is provided on the movable plate 2, and the guide rod 3 passes through the linear ball guide sleeve 4, so that the movable plate 2 moves up and down along the guide rod 3.

[0048] In the embodiment of the present invention, four linear ball guide sleeves 4 are arranged on the four corners of the movable plate 2, and four guide rods 3 connected to the support bracket 14 respectively pass through the linear ball guide sleeves 4 on the movable plate 2. There is rolling friction between the linear ball guide sleeves 4 and the guide rods 3, and the friction coefficient is small, about 0.004. When the power unit 1 in the up and down moving assembly provides an upward pulling force, the movable plate 2 moves upward in a straight line under the guidance of the four guide rods 3, thereby driving the rotation drive assembly 16 to move upward in a straight line; when the power unit 1 in the up and down moving assembly provides a downward force, the movable plate 2 moves downward in a straight line under the guidance of the four guide rods 3, thereby driving the rotation drive assembly 16 to move downward in a straight line.

[0049] In another embodiment, Figures 1 to 4 As shown, in order to activate the emergency plan and operate the reactor switch cover when the power unit fails, the rotation drive component 16 in the device also includes a cylinder 5 and a connecting bracket 6; one end of the connecting bracket 6 is connected to the movable plate 2; a connecting hole is provided on the output shaft of the power unit 1, and a connecting hole is provided on the other end of the connecting bracket 6. When the power is on, the cylinder shaft of the cylinder 5 is inserted into the two connecting holes to fix the power unit 1 and the connecting bracket 6; when the power is off, the cylinder shaft escapes from the two connecting holes to separate the power unit 1 from the connecting bracket 6.

[0050] In the embodiment of the present invention, under normal power-on working state, one end of the cylinder shaft of the cylinder 5 is inserted into the connecting hole on the output shaft of the power unit 1, and the other end is inserted into the connecting hole of the connecting bracket 6. At this time, the power unit 1 is fixedly connected to the connecting bracket 6. In addition, in order to facilitate maintenance after a fault, the rotary drive assembly 16 can also perform a fault power-off backup plan operation. The backup plan can also open the kettle cover and manually control the moving plate to facilitate the removal of radioactive fuel elements. The specific steps are: when the servo motor fails and loses power, the cylinder 5 can pneumatically retract the piston rod, and the cylinder shaft disengages from the two connecting holes on the power unit 1 and the connecting bracket 6, so that the power unit 1 is disconnected from the connecting bracket 6, and the moving plate 2 automatically descends under the action of gravity. At the same time, the pneumatic motor 7 can continue to perform the opening and closing operations of the kettle cover 11.

[0051] Based on the above embodiments, Figures 1 to 4 As shown, in order to make the emergency plan compatible with the original device, the driving structure in the device includes a pneumatic motor 7 and a reducer 8; the pneumatic motor 7 is connected to the input end of the reducer 8, and the drive shaft 9 is connected to the output end of the reducer 8, so that the pneumatic motor 7 drives the drive shaft 9 to rotate forward and reverse through the reducer 8.

[0052] In the embodiment of the present invention, the reducer 8 is an electric or pneumatic carrier. Under normal working conditions of the device, it is essentially driven by electricity. In the event of a fault, it is essentially driven by the pneumatic motor 7. In order to combine the two functions of electric and pneumatic, the reducer 8 is installed. From an intuitive point of view, the reducer 8 serves as a direct driving source. In the event of a power outage due to a fault, the start and stop are achieved by controlling the air flow out of the gas cylinder connected to the pneumatic motor 7.

[0053] In another embodiment, Figures 1 to 4 As shown, in order to prevent foreign matter from falling into the reactor and keep the reactor clean, the device also includes a baffle assembly 13 arranged above the reactor 15; the baffle assembly 13 includes a limiting slide groove and a block, and the limiting slide groove is arranged on both sides of the block so that the block slides in the limiting slide groove.

[0054] In the embodiment of the present invention, when the lid of the reactor is open, in order to prevent the fuel elements or other debris from falling into the reactor when the robot removes the fuel elements, the robot first pushes the block in the baffle assembly 13 to the top of the reactor mouth along the direction specified by the limiting slide groove before removing the fuel elements.

[0055] The embodiment of the present invention provides a reactor system, such as Figures 1 to 4 As shown, it includes an automatic opening and closing cover device for a reactor, a reactor 15 and a control cabinet; a driving shaft 9 in the automatic opening and closing cover device for the reactor is connected to a first end of a reactor cover 11 of the reactor 15, so that the driving shaft 9 drives the reactor cover 11 to rotate forward and reverse; the control cabinet is wirelessly controlled and connected with a power unit 1 and a driving structure in the automatic opening and closing cover device for the reactor, so that the control cabinet controls the start and stop and driving direction of the power unit 1 and the driving structure.

[0056] Based on the above embodiments, Figure 5 and Figure 6 As shown, in order to facilitate the transmission of torque and the installation and removal of fuel elements by the manipulator, a square portion is provided at the first end of the kettle cover 11 in the system, and the square portion is inserted into the hollow square hole 17 in the drive shaft; a hook 20 is provided at the second end of the kettle cover 11, and a hanging basket 12 for loading nuclear fuel elements is suspended by the hook 20.

[0057] Based on the above embodiments, Figure 5 and Figure 6 As shown, in order to enable the automatic opening and closing cover device of the reactor to be separated from the reactor during maintenance, a reactor cover pin hole is provided on the square portion provided at the first end of the reactor cover 11, and an axial waist-shaped groove 18 is provided on the driving shaft 9, so that the reactor cover 11 can be installed and disassembled through the positioning pin 19 provided in the reactor cover pin hole and the axial waist-shaped groove 18.

[0058] In other embodiments, Figure 6 As shown, in order to play a role of buffering and thread compression, an elastic component 10 is sleeved on the outer wall of the square part.

[0059] In other embodiments, Figure 6 As shown, in order to reduce the influence of high temperature on the reducer, a heat insulation pad 21 is provided on the contact surface between the driving shaft 9 and the kettle cover 11 .

[0060] In the embodiment of the present invention, the reactor system completes the automatic operation and control of opening and closing the reactor cover, as well as the loading and unloading of the fuel elements in the reactor through the following steps: the operating manipulator places the fuel elements in the hanging basket 12, and then hangs the hanging basket 12 loaded with the fuel elements on the hook at the lower end of the nut of the reactor cover 11. The operating manipulator pulls open the block of the baffle assembly 13, and controls the power unit 1 through the control cabinet to drive the rotary drive assembly 16 and the movable plate 2 to move downward along the smooth surface of the guide rod 3 as a whole, and at the same time drives the reactor cover 11 and the hanging basket 12 connected below the rotary drive assembly 16 to move downward. When the hanging basket 12 moves down to enter the reactor 15, the threaded end face of the reactor cover 11 contacts the end face of the screw hole of the reactor 15, and continues to move down, compressing the elastic component 10, playing a role of buffering and thread pressing, and under the action of the control cabinet, the rotary drive assembly 16 drives the thread of the reactor cover 11 to automatically screw in, until the torque monitored by the control cabinet reaches the set torque value, the automatic closing of the reactor cover is realized, and the loading and sealing of the fuel elements in the high-temperature and high-pressure reactor are completed. On the contrary, under the action of the control cabinet, the rotary drive assembly 16 drives the kettle cover 11 to rotate in the reverse direction, and the kettle cover thread is automatically screwed out, realizing the automatic opening of the kettle cover. Then, the power unit 1 provides an upward pulling force to lift the hanging basket 12 loaded with fuel elements to a height that the manipulator can operate. The manipulator pushes in the block of the baffle assembly 13 to cover the reactor to prevent the fuel elements or other debris from falling into the reactor, and the fuel elements are unloaded by the manipulator.

[0061] It should be noted that the maximum pressure in the reactor is 5 MPa and the maximum temperature is 250°C. The height of the reactor mouth from the ground can be preferably set to 905 mm, which can facilitate observation of the robot in the hot chamber loading and unloading workpieces into the reactor.

[0062] A reactor system provided by an embodiment of the present invention can realize automatic operation and control of opening and closing the lid of a high-temperature and high-pressure reactor in a hot chamber by providing a driving force for up and down movement through an up and down moving assembly and a driving force for forward and reverse rotation through a rotating driving assembly, compared with the prior art. After the reactor lid is opened, the fuel element loading tool can be lifted to the manipulator operable area, which is convenient for loading and unloading the fuel elements by the manipulator, and all manipulator operations in the hot chamber can be realized.

[0063] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for automatically opening and closing the lid of a reactor, characterized in that: include: Up and down moving components and rotation driving components; The up-and-down moving assembly includes a moving plate and a power unit; the rotation driving assembly is mounted on the moving plate, and the power unit is connected to the moving plate to drive the moving plate and the power unit to move up and down; The rotary drive assembly includes a drive structure and a drive shaft; the drive structure is connected to the drive shaft so that the drive structure drives the drive shaft to rotate forward and reverse.

2. The device according to claim 1, characterized in that The device also includes a support bracket for fixing the reaction kettle; The up-and-down moving assembly also includes a guide rod connected to the supporting bracket; A linear ball guide sleeve is arranged on the movable plate, and the guide rod passes through the linear ball guide sleeve, so that the movable plate moves up and down along the guide rod.

3. The device according to claim 1, characterized in that The rotary drive assembly also includes a cylinder and a connecting bracket; One end of the connecting bracket is connected to the movable plate; A connecting hole is provided on the output shaft of the power unit, and a connecting hole is provided at the other end of the connecting bracket. When the power is on, the cylinder shaft of the cylinder is inserted into the two connecting holes to fix the power unit and the connecting bracket; when the power is off, the cylinder shaft slips out of the two connecting holes to separate the power unit and the connecting bracket.

4. The device according to claim 1, characterized in that The driving structure includes a pneumatic motor and a reducer; The pneumatic motor is connected to the input end of the reducer, and the drive shaft is connected to the output end of the reducer, so that the pneumatic motor drives the drive shaft to rotate forward and reverse through the reducer.

5. The device according to claim 1, characterized in that The device also includes a baffle assembly disposed above the reaction kettle; The baffle assembly comprises a limiting sliding groove and a stopper, wherein the limiting sliding groove is arranged on both sides of the stopper, so that the stopper slides in the limiting sliding groove.

6. A reactor system, characterized in that: It includes an automatic opening and closing cover device for a reactor, a reactor and a control cabinet; The driving shaft in the automatic opening and closing cover device of the reactor is connected to the first end of the reactor cover of the reactor, so that the driving shaft drives the reactor cover to rotate forward and reverse; The control cabinet is wirelessly connected to the power unit and the driving structure in the automatic opening and closing cover device of the reactor, so that the control cabinet controls the start and stop and driving direction of the power unit and the driving structure.

7. The system according to claim 6, characterized in that The first end is provided with a square portion, and the square portion is inserted into the hollow square hole of the driving shaft; the second end of the kettle cover is provided with a hook, and a hanging basket for loading nuclear fuel elements is hung by the hook.

8. The system according to claim 7, characterized in that The square portion is provided with a kettle cover pin hole, and the drive shaft is provided with an axis waist-shaped groove, so that the kettle cover can be installed and removed through a positioning pin arranged in the kettle cover pin hole and the axis waist-shaped groove.

9. The system according to claim 7, characterized in that The outer wall of the square part is sleeved with an elastic component.

10. The system according to any one of claims 6 to 9, characterized in that: A heat insulation pad is provided on the fitting surface between the driving shaft and the kettle cover.

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