A welding device for a radioactive environment

Abstract

The application discloses a welding device for a radioactive environment, which comprises a welding unit, a shielding unit, a maintenance unit and a channel. The welding unit is used for welding of parts in the radioactive environment. The shielding unit is installed outside the radioactive environment to shield the radiation of the radioactive environment. The maintenance unit is arranged outside the radioactive environment to maintain the welding unit. The channel passes through the shielding unit to connect the welding unit and the maintenance unit, so that the welding unit moves between the radioactive environment and the maintenance unit to connect the welding station and the maintenance station together. The welding device simplifies the remote indirect welding and maintenance operation, and can realize the maintenance and repair of the welding device by the operator outside the hot chamber, thereby ensuring the accuracy and safety of the operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding, in particular, to a welding device and welding unit capable of remotely welding a waste barrel in a hot cell and facilitating personnel inspection and maintenance. BACKGROUND

[0002] In the field of nuclear chemical engineering, solid waste treated in a hot cell often has radioactivity. In order to prevent radioactive leakage, radioactive solid waste needs to be stored in a corresponding waste barrel. In order to prevent the leakage of radioactive nuclides, the barrel body and the barrel cover of the waste barrel should be connected by welding measures to form a sealed container. Due to strong radioactivity, the operator cannot directly approach the waste barrel for welding operation. The above welding process needs to be carried out in the hot cell, and the personnel should operate remotely outside the hot cell, which can only be indirectly operated through a mechanical hand or a special tool.

[0003] During inspection and maintenance, since the existing welding device and related matching motors, sensors, etc. are fixed in the hot cell, when the above components fail or need to be maintained, the operator needs to repair the welding device in the hot cell through a gas suit. For the characteristics of the hot cell having strong radioactivity and small operating space, it is not conducive to the safety and operability of the operator.

[0004] The prior art CN114310055A discloses a waste barrel transfer and welding sealing unit. The welding device is used for welding and sealing the waste barrel transported on the barrel feeding roller. The welding device can be arranged on one side of the barrel feeding roller. The unit also includes a positioning device, which is a type of device for positioning the waste barrel transported on the barrel feeding roller. The positioning device is arranged below the barrel feeding roller and corresponds to the position of the welding device, and is used for positioning the waste barrel on the barrel feeding roller to cooperate with the welding device to weld and seal the waste barrel. The welding device includes a welding gun, a robot, etc. The prior art provides the working efficiency of waste barrel transfer and welding sealing, and to some extent reduces the radiation risk of the operator, but it is not convenient to inspect and maintain the remotely welded device.

[0005] In view of the above technical problems, the present application is proposed. SUMMARY

[0006] The main purpose of the present application is to provide a waste barrel automatic welding device convenient to maintain, which connects the welding station and the maintenance station together, simplifying the remote indirect welding and maintenance operation. In order to achieve the above purpose, the present application provides a welding device for radioactive environment, which comprises: a welding sealing unit for welding parts in the radioactive environment; a shielding unit installed outside the radioactive environment to shield the radiation of the radioactive environment; a maintenance unit arranged outside the radioactive environment to maintain the welding sealing unit; a channel passing through the shielding unit to connect the welding sealing unit and the maintenance unit, so that the welding sealing unit moves between the radioactive environment and the maintenance unit, so that the welding station and the maintenance station are connected together. When welding parts in the radioactive environment is needed, the trolley is opened to the welding station in the radioactive environment; when maintenance is needed, the trolley is opened to the maintenance unit, i.e. the trolley is opened to the maintenance station. The welding device connects the welding station and the maintenance station together, simplifying the remote indirect welding and maintenance operation, and realizing the maintenance and repair of the welding device outside the hot chamber, ensuring the accuracy and safety of the operation.

[0007] The following is the further optimization of the present application to the above scheme:

[0008] Further, the radioactive environment is a hot chamber, which comprises a containing space and a wall body, the containing space is used for containing parts; the wall body can be installed with a channel, so that the channel connects the hot chamber and the maintenance unit.

[0009] Further, the welding sealing unit comprises a trolley unit and an automatic welding machine unit, the trolley unit and the automatic welding machine unit are connected to drive the automatic welding machine unit to move between the hot chamber and the maintenance unit.

[0010] Further, the trolley unit comprises a trolley body and a track, the track is laid in the channel, the track comprises a hot chamber end and a maintenance end, and the trolley body can move along the track from the hot chamber end to the maintenance end.

[0011] Further, the trolley unit further comprises an emergency recovery mechanism, which is arranged at the hot chamber end of the track to recover the trolley body in case of failure.

[0012] Further, the automatic welding machine unit comprises a welding gun assembly, a motion turntable, a turntable driving mechanism and a rotary motor, the welding gun assembly is connected with the motion turntable, and the turntable driving mechanism is connected with the rotary motor and the motion turntable respectively to transmit the power of the rotary motor to the motion turntable.

[0013] Further, the shielding unit comprises: a shielding lifting door, the shielding lifting door comprises a hot chamber end shielding lifting door and an inspection end shielding lifting door, the hot chamber end shielding lifting door is located at the hot chamber end of the channel, and the inspection end shielding lifting door is located at the inspection end of the channel; and shielding blocks, a plurality of shielding blocks are located between the hot chamber end shielding lifting door and the inspection end shielding lifting door and are arranged inside the two sides of the wall.

[0014] Further, the hot chamber end shielding lifting door comprises an inner door plate and an inner guide rail, the inner door plate moves along the inner guide rail; and the inspection end shielding lifting door comprises an outer door plate and an outer guide rail, the outer door plate moves along the outer guide rail.

[0015] Further, the hot chamber end shielding lifting door and the inspection end shielding lifting door further comprise a power unit and a first wall-penetrating member, the power unit is arranged outside the hot chamber, and the power unit drives the inner door plate and the outer door plate to move along the outer guide rail through the first wall-penetrating member, so as to close and open the hot chamber end of the channel or close and open the inspection end of the channel.

[0016] Further, the first wall-penetrating member is fixed in the wall of the hot chamber.

[0017] Further, the inspection unit comprises an inspection glove box and a test unit, and the inspection glove box is communicated with the hot chamber through the channel.

[0018] Further, the inspection glove box comprises a plurality of sealing gloves arranged in length and height positions.

[0019] Further, the inspection unit further comprises a test unit, and the test unit is arranged in the inspection glove box. Maintenance personnel can maintain the maintenance parts from multiple angles, and the efficiency and operability of the maintenance process are improved.

[0020] Further, the welding device further comprises a lifting unit, the lifting unit comprises a jacking driving mechanism, a lifting platform and a support, the jacking driving mechanism is fixed at the bottom of the hot chamber, the lifting platform is connected with the jacking driving mechanism and the support, and the support can fix the parts.

[0021] Further, the welding device further comprises a control unit, and the control unit is used for controlling the movement of one or more of the trolley unit, the automatic welding machine unit, the lifting unit, the hot chamber end shielding lifting door and the inspection end shielding lifting door.

[0022] The technical scheme of the present application at least has the following beneficial effects:

[0023] 1) The channel passing through the wall of the hot chamber enables the welding unit to move between the radiation environment and the inspection unit, so that the welding station and the inspection station are connected together, the remote indirect welding and the inspection operation are simplified, the operator can maintain and repair the welding device outside the hot chamber, and the accuracy and safety of the operation are ensured;

[0024] 2) The automatic welding device adopts a waste barrel fixed and a welding gun rotated to realize automatic welding of the weld, the waste barrel and the welding gun are respectively provided with position and direction adjusting functions through the lifting unit and the welding sealing unit, so that the positioning between the welding gun and the welding sealing is facilitated, and the reliability of the weld and the stability of the welding are improved, and the welding device is provided with a camera, so that the molten pool in the welding process can be monitored in real time, and the welding quality is improved;

[0025] 3) The automatic welding device can be moved to the maintenance glove box outside the hot chamber for maintenance under the condition of meeting the sealing and radiation safety through simple remote operation, so that the radiation damage of radioactive materials to the human body is effectively reduced;

[0026] 4) The automatic welding device adopts an external power form, that is, the driving motor is installed outside the hot chamber, and the power is transmitted to the hot chamber through the second wall-penetrating piece, so that the personnel can conveniently maintain the parts, the number and time of personnel entering the hot chamber are reduced, and the safety of personnel is improved;

[0027] 5) The maintenance glove box of the automatic welding device is provided with a plurality of sealing gloves at different positions in the height and length directions, so that the maintenance personnel can maintain the maintenance parts from multiple angles, and the efficiency and operability of the maintenance process are improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings accompanying the specification of the present application form a part of the present application and serve to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0029] Figure 1 a structure schematic view of a waste barrel to be welded is shown; and

[0030] Figure 2 a structure sectional view of the welding device provided by the present application is shown; and

[0031] Figure 3 a top view of Figure 2 is shown; and

[0032] Figure 4 a K view of Figure 2 is shown; and

[0033] Figure 5 an isometric view of the welding device provided by the present application is shown; and

[0034] Figure 6 a lifting unit schematic view of the welding device provided by the present application is shown; and

[0035] Figure 7A schematic diagram of a shielding unit of the welding device provided by the present application; and

[0036] Figure 8 A schematic diagram of a welding unit of the welding device provided by the present application.

[0037] Among them, the above-mentioned drawings include the following reference signs:

[0038] 1, waste bucket body; 2, waste bucket cover; 3, lifting platform; 4, support; 5, vehicle body; 6, welding gun assembly; 7, camera; 8, motion turntable; 9, turntable driving mechanism; 10, slewing motor; 11, shielding block; 12, inner door plate; 13, inner guide rail; 14, lifting mechanism; 15, first wall-penetrating through member; 16, speed reducer; 17, maintenance glove box; 18, glove assembly; 19, lifting motor; 20, passage; 21, rail; 22, second wall-penetrating through member; 23, trolley motor; 24, jacking driving mechanism; 25, air inlet filter; 26, air outlet filter; 27, wheel; 28, outer guide rail; 29, drag chain; 30, emergency recovery mechanism; 31, outer door plate; 32, tungsten electrode automatic replacement device; 33, test unit; 34, clamping wheel; 35, clamping wheel adjusting device;

[0039] A, outside the hot cell; B, inside the hot cell. DETAILED DESCRIPTION

[0040] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0041] The present application will be further described in detail below in combination with specific embodiments, which cannot be understood as limiting the scope of the present application. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the field of nuclear chemical industry, in order to weld parts for storing nuclear waste, such as waste barrels and the like as shown in Figure 1 , the operator should be away from the radioactive environment for indirect operation, in order to facilitate the maintenance of the welding device, the present application provides an automatic welding device in a radioactive environment which is convenient to maintain.

[0044] As shown in Figure 2 , the welding device comprises a welding unit, a shielding unit, a maintenance unit and a passage 20. The welding unit is used for welding parts in the radioactive environment. The shielding unit is installed outside the radioactive environment to shield the radiation of the radioactive environment. The maintenance unit is arranged outside the radioactive environment to safely maintain the welding unit. The passage 20 passes through the shielding unit to connect the welding unit and the maintenance unit, so that the welding unit moves between the radioactive environment and the maintenance unit, so that the welding station and the maintenance station are connected together. When it is necessary to weld parts in the radioactive environment, such as waste barrels, the trolley is opened to the welding station in the radioactive environment, that is, the trolley is opened to the welding station; when maintenance is needed, the trolley is opened to the maintenance unit, that is, the trolley is opened to the maintenance station. The welding device connects the welding station and the maintenance station together, simplifies the remote indirect welding and maintenance operation, and can realize the maintenance and repair of the welding device by the operator A outside the hot chamber, ensuring the accuracy and safety of the operation.

[0045] The automatic welding device can move the welding unit to the maintenance glove box 17 outside the hot chamber A for maintenance and repair under the condition of meeting the sealing and radiation safety, effectively reducing the radiation damage of radioactive materials to the human body.

[0046] The radioactive environment can be a hot chamber, which comprises a containing space and a wall body. The containing space is used for containing waste barrels; the wall body can be provided with a passage 20, so that the passage 20 connects the hot chamber and the maintenance unit. The welding unit can move between the hot chamber and the maintenance unit, realizing the welding of the waste barrels in the hot chamber B and the workpiece welding test in the maintenance unit or the maintenance and repair of the welding unit in the maintenance unit.

[0047] The welding unit comprises a trolley unit and an automatic welding machine unit, the trolley unit and the automatic welding machine unit are connected to drive the automatic welding machine unit to move between the hot chamber and the maintenance unit. The automatic welding machine unit can rotate around the waste barrel cylinder and the barrel cover to be welded to complete the sealing between the barrel body 1 and the barrel cover.

[0048] The trolley unit, as shown in Figure 5 、 Figure 8 , comprises a trolley body 5 and a track 21, the track 21 is laid in the passage 20, the track 21 comprises a hot chamber end and a maintenance end, the trolley body 5 moves along the track 21 from the hot chamber end to the maintenance end through the wheels 27. The trolley unit further comprises a trolley motor 23, sensors and a drag chain 29, wherein the trolley motor 23, sensors and the drag chain 29 are fixed on the trolley body 5, the drag chain 29 is connected with the trolley body 5 to realize the reciprocating movement of the trolley unit cable with the trolley body 5. Further, the trolley unit further comprises an emergency recovery mechanism 30, which is arranged at the hot chamber end of the track 21 to recover the trolley body 5 in case of failure.

[0049] The automatic welding machine unit, as shown in Figure 2 、 Figure 3 , comprises a welding gun assembly 6, a moving turntable 8, a turntable driving mechanism 9 and a slewing motor 10, the welding gun assembly 6 is connected with the moving turntable 8. The turntable driving mechanism 9 is connected with the slewing motor 10 and the moving turntable 8 respectively to transmit the power of the slewing motor 10 to the moving turntable 8. The automatic welding machine unit further comprises a camera 7, a tungsten electrode automatic replacement device 32, a clamping wheel 34 and a clamping wheel adjusting device 35. The moving turntable 8 serves as a carrier and is connected with the welding gun assembly 6, the tungsten electrode automatic replacement device 32 and the camera 7, the clamping wheel 34 and the clamping wheel adjusting device 35 to realize the positioning, clamping and rotating welding work of the automatic welding machine unit around the waste barrel.

[0050] The automatic welding device adopts the mode of fixing the waste barrel and rotating the welding gun to realize automatic welding of the weld. The waste barrel and the welding gun have position and direction adjusting functions through the lifting unit and the welding unit respectively, which facilitates the positioning between the welding gun and the welding unit, and further improves the reliability of the weld and the stability of the welding. At the same time, the welding device is provided with a camera 7, which can monitor the molten pool in real time during the welding process to improve the welding quality.

[0051] Shielding units are installed and fixed on the inner side and the outer side of the wall of the hot chamber for realizing the radiation protection of the personnel during the use and the maintenance of the welding device. The shielding units include shielding lifting doors and shielding blocks 11. The shielding lifting doors include hot chamber end shielding lifting doors and maintenance end shielding lifting doors, the hot chamber end shielding lifting doors are located at the hot chamber end of the passage 20, and the maintenance end shielding lifting doors are located at the maintenance end of the passage 20. A plurality of shielding blocks 11 are located between the hot chamber end shielding lifting doors and the maintenance end shielding lifting doors and are arranged on the inside of the wall. The hot chamber end shielding lifting doors include inner door plates 12 and inner guide rails 13, and the maintenance end shielding lifting doors include outer door plates 31 and outer guide rails 28.

[0052] The hot chamber end shielding lifting doors and the maintenance end shielding lifting doors further include a power unit and a first wall-through penetrating part 15, the power unit is arranged outside the hot chamber A, and the power unit operates the inner door plates 12 and the outer door plates 31 to move along the inner guide rails 13 and the outer guide rails 28 respectively through the first wall-through penetrating part 15, so as to drive the inner door plates 12 or the outer door plates 31 to close or open the hot chamber end of the passage 20 or the maintenance end of the passage 20. The first wall-through penetrating part 15 is fixed in the wall of the hot chamber. The power unit includes a speed reducer 16, a lifting mechanism 14, the inner guide rails 13, the outer guide rails 28 and a sensor. The inner door plates 12 and the outer door plates 31 are connected with the lifting mechanism 14, the speed reducer 16 and the sensor are located outside the hot chamber A, the power of the speed reducer 16 is transmitted to the lifting mechanism 14 inside the hot chamber B through the first wall-through penetrating part 15, and the lifting mechanism 14 drives the door plates to move up and down.

[0053] The automatic welding device adopts the form of external power, that is, the driving motor is installed outside the hot chamber A, and the power is transmitted to the inside of the hot chamber B through a second wall-through penetrating part 22, so that it is more convenient for personnel to maintain the parts, the number and time of personnel entering the hot chamber are reduced, and the safety of personnel is improved.

[0054] The maintenance unit is installed and fixed outside the hot chamber A, and is used for the maintenance and repair of the welding sealing unit, the replacement of the vulnerable parts and the welding test of the welding test parts. The maintenance unit includes a maintenance glove box 17 and a test unit 33. The maintenance glove box 17 is communicated with the hot chamber through the passage 20 and includes a plurality of glove assemblies 18 arranged in length and height positions. The maintenance unit further includes the test unit 33, the test unit 33 is arranged in the maintenance glove box 17 and includes welding test workpieces and test devices, the test devices include a support 4 for fixing the welding test workpieces during welding, kerosene, white powder paste, brushes and other test tools and containers of raw materials.

[0055] As shown in FIG. 1, the automatic welding device includes a hot chamber 1, a welding sealing unit 2 and a maintenance unit 3. Figure 4As shown, the maintenance glove box 17 is connected to the hot cell through the channel 20, including the ventilation unit, the glove assembly 18 and the observation panel. The ventilation unit includes the air inlet and outlet filters 26 installed on the top of the maintenance glove box 17, the glove assembly is connected to the observation panel, and the glove assembly 18 includes a plurality of sealing gloves installed at multiple levels on both sides and ends of the maintenance glove box 17. The maintenance glove box 17 of the automatic welding device is provided with sealing gloves at different positions in the height and length directions, and the maintenance personnel can maintain the maintenance parts from multiple angles, thereby improving the efficiency and operability of the maintenance process.

[0056] The welding device also includes a lifting unit, as shown in Figure 2 、 Figure 5 、 Figure 7 The lifting unit is fixedly installed in the hot cell for fixing, rough positioning, lifting and rotating orientation adjustment of the waste barrel, so that the waste barrel reaches a suitable position for welding by the welding unit. The lifting unit includes a jacking drive mechanism 24, a lifting platform 3 and a support 4. The jacking drive mechanism 24 is fixed at the bottom of the hot cell, the lifting platform 3 is connected with the jacking drive mechanism 24 and the support 4, and the support 4 can fix the waste barrel and other parts. The waste barrel can be fixed in the waste barrel support 4, and the second wall-penetrating member 22 is fixed in the wall of the hot cell, one end of which is connected with the jacking drive mechanism 24 and the other end is connected with the lifting motor 19.

[0057] The lifting motor 19 is fixed outside the hot cell A, and the power is transmitted to the jacking drive mechanism 24 inside the hot cell B through the second wall-penetrating member 22, so that the jacking drive mechanism 24 drives the lifting platform 3 to further drive the waste barrel in the support 4 to move up and down.

[0058] The welding device also includes a control unit. The control unit is fixedly installed outside the hot cell A, and is used to control the movement of the trolley unit and the automatic welding machine unit, the movement of the lifting unit, the up-down movement of the shielding lifting door, and is used to control the on-off of the welding power supply and the welding gas source, to adjust the welding parameters, and to record the welding process parameters.

[0059] In the working mode, the lifting unit is as shown in Figure 6As shown, the waste barrel to be welded is transported to the waste barrel support 4 of the lifting unit by the B hoisting equipment in the hot chamber, the waste barrel support 4 is provided with a guide mechanism, which can realize the centering and positioning of the waste barrel and the support 4, and the waste barrel support 4 is connected with the lifting platform 3. The welding sealing unit is moved to above the waste barrel by the trolley motor 23, and the lifting platform 3 is connected with the jacking drive mechanism 24. The second wall-through penetrating member 22 is fixed in the wall of the hot chamber, and the second wall-through penetrating member 22 is provided with a lifting motor 19 at one end outside the hot chamber A and is connected with the jacking drive mechanism 24 at the other end inside the hot chamber B. The lifting motor 19 drives the jacking drive mechanism 24 through the second wall-through penetrating member 22, and then transmits power to the lifting platform 3, so as to finally realize the position adjustment of the waste barrel support 4 in height and angle. All electrical components of the lifting unit are arranged outside the hot chamber A, and the hot chamber B is a mechanical transmission component not affected by radiation.

[0060] The working mode of the welding sealing unit is as shown in Figure 8 As shown, the initial state of the welding sealing unit is in the channel 20, the trolley body 5 in the welding sealing unit is connected with the wheels 27, the trolley body 5 is driven to move on the track 21 laid between the hot chamber and the maintenance unit by the trolley motor 23, the rotary drive mechanism 9 is installed on the trolley body 5 and connected with the rotary motor 10 and the moving turntable 8, the rotary motor 10 transmits power to the moving turntable 8 through the rotary drive mechanism 9 to drive it to make multi-directional adjustment movement according to the position of the waste barrel body 1 to be welded, and the moving turntable 8 is installed with the clamping wheel 34, the clamping wheel adjusting device 35, the welding gun assembly 6, the camera 7 and the tungsten electrode automatic replacement device 32.

[0061] The clamping wheel 34 is centered on the axis of the moving turntable 8, and the three clamping wheels 34 are evenly installed on the moving turntable 8, and the adjustment of the inside cutting circle diameter of the wheel is realized by the clamping wheel adjusting device 35, so as to realize the clamping and positioning of the moving turntable 8 and the waste barrel body 1. Among them, the tungsten electrode automatic replacement device 32 can realize the automatic replacement of the welding gun tungsten electrode, the above-mentioned welding gun assembly 6 can realize the position adjustment and welding work of the welding gun, and the camera 7 can realize the observation of the welding process of the waste barrel body 1 and the waste barrel cover 2;

[0062] After the waste barrel is adjusted to the appropriate position, the adjustment of the relative position of the welding gun assembly 6 and the weld is completed by adjusting the rotating disc driving mechanism 9 of the welding sealing unit. The operation control unit starts the welding device, and the A operator outside the hot chamber can observe the welding condition through the camera 7. After welding is completed, the lifting motor 19 of the lifting unit drives the lifting platform 3 to lower the waste barrel, the trolley motor 23 of the welding sealing unit drives the trolley body 5 to move the rotating disc 8 back to the channel 20, and the hoisting equipment in the hot chamber B transfers the welded waste barrel from the lifting platform 3. In the above working mode, the inner door plate 12 of the hot chamber side shielding lifting door is lifted along the inner guide rail 13 under the power of the speed reducer 16, and the hot chamber side shielding lifting door is in the open state, and the outer door plate 31 of the shielding lifting door in the maintenance unit is in the closed state.

[0063] In the maintenance mode, when the welding sealing unit needs to be maintained, maintained or tested, first, the trolley motor 23 is started to move the welding sealing unit into the channel 20, at this time, the second through-wall penetrating part 22 and the lifting mechanism 14 are driven by controlling the speed reducer 16 to make the inner door plate 12 of the hot chamber side shielding door move vertically along the inner guide rail 13, after the inner door plate 12 of the hot chamber side shielding door is completely lowered, the shielding lifting door in the maintenance unit is opened. The outer door plate 31 is lifted along the outer guide rail 28, at this time, the trolley motor 23 is controlled to move the welding sealing unit into the maintenance glove box 17, and after being moved to the position, the shielding lifting door in the maintenance unit is closed.

[0064] The maintenance of the welding sealing unit and other components is carried out in the maintenance glove box 17, and the operator operates through the glove assembly 18 and the observation panel. The top of the maintenance glove box 17 is provided with an air inlet filter 25 and an air outlet filter 26, so that independent air inlet and outlet work of the glove box can be carried out.

[0065] When the welding sealing unit cannot be moved to the maintenance unit due to failure in the hot chamber B, the trolley emergency recovery mechanism 30 at one end of the track 21 can be started. The trolley body 5 is driven by the trolley emergency recovery mechanism 30 to move from the hot chamber to the maintenance unit for maintenance.

[0066] After the maintenance process is completed, the welding sealing unit returns to the channel 20 along the track 21, the outer door plate 31 is lowered along the outer guide rail 28 by relying on the driving of the lifting mechanism 14 under the power of the speed reducer 16, and the shielding lifting door in the maintenance unit is in the closed state.

[0067] The specific operation sequence of the present application is as follows:

[0068] Working mode:

[0069] 1) The hoisting equipment in the hot chamber B transports the waste barrel to be welded to the waste barrel support 4 of the lifting unit and fixes it;

[0070] 2) Start the deceleration motor 16, and raise the inner door plate 12 of the shield door on the hot chamber side along the inner guide rail 13 to the open state through the second wall-through penetrating member 22 and the lifting mechanism 14;

[0071] 3) Start the trolley motor 23, and drive the trolley body 5 to move along the rail 21 from the passage 20 to above the waste barrel support 4 in the hot chamber B;

[0072] 4) Control the lifting motor 19 of the lifting unit to drive the lifting platform 3 to adjust the waste barrel to the welding position;

[0073] 5) Adjust the clamping wheel adjusting device 35 to clamp the waste barrel body 1 by the clamping wheel 34, start the moving turntable 8 and the welding gun assembly 6 to start welding;

[0074] 6) After the welding is completed, control the lifting motor 19 of the lifting unit to drive the lifting platform 3 to lower the waste barrel;

[0075] 7) Start the trolley motor 23, and drive the trolley body 5 to move from above the waste barrel support 4 in the hot chamber B to the passage 20 in the hot chamber wall.

[0076] Inspection and maintenance mode:

[0077] 1) Start the deceleration motor 16, and lower the inner door plate 12 of the shield door on the hot chamber side along the inner guide rail 13 to the closed state through the second wall-through penetrating member 22 and the lifting mechanism 14, and raise the outer door plate 31 of the shield lifting door in the inspection unit along the outer guide rail 28 to the open state;

[0078] 2) Start the trolley motor 23, and drive the trolley body 5 to move along the rail 21 from the passage 20 to the inspection work station in the inspection glove box 17;

[0079] 3) The operator performs maintenance and maintenance work on the welding sealing unit or performs related test work on the test unit 33 through the glove assembly 18 and the observation panel;

[0080] 4) After the inspection and maintenance work is completed, start the trolley motor 23, and drive the trolley body 5 to move along the rail 21 from the inspection work station in the inspection glove box 17 to the passage 20;

[0081] 5) Start the deceleration motor 16, and lower the outer door plate 31 of the shield lifting door in the inspection unit along the outer guide rail 28 to the closed state.

[0082] In summary, from the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0083] 1) The passage 20 through the wall of the hot cell makes the welding unit move between the radiation environment and the maintenance unit, so as to connect the welding station and the maintenance station together, simplifies the remote indirect welding and maintenance operation, realizes the maintenance and repair of the welding device by the operator outside the hot cell A, and guarantees the accuracy and safety of the operation;

[0084] 2) The automatic welding device adopts the mode of waste barrel fixation and welding gun rotation to realize automatic welding of the weld, the waste barrel and the welding gun are respectively adjusted in position and direction by the lifting unit and the welding unit, the positioning between the welding gun and the welding unit is facilitated, the reliability of the weld and the stability of the welding are improved, the welding device is provided with a camera 7, the molten pool during the welding process can be monitored in real time, and the welding quality is improved;

[0085] 3) The automatic welding device can be moved to the maintenance glove box 17 outside the hot cell A for maintenance and repair under the condition of meeting the sealing and radiation safety, and the radiation damage of radioactive materials to the human body is effectively reduced;

[0086] 4) The automatic welding device adopts the form of external power, that is, the driving motor is installed outside the hot cell A, and the power is transmitted to the inside B of the hot cell through the second wall-penetrating part 22, so that the personnel can conveniently maintain the parts, the number and time of personnel entering the hot cell are reduced, and the safety of personnel is improved;

[0087] 5) The maintenance glove box 17 of the automatic welding device is provided with a plurality of sealing gloves at different positions in the height and length directions, the maintenance personnel can maintain the maintenance parts from multiple angles, and the efficiency and operability of the maintenance process are improved.

[0088] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding apparatus for a radioactive environment, characterized by, The welding device comprises a welding unit for welding parts in the radiation environment, the welding unit comprises a trolley unit and an automatic welding machine unit, the trolley unit and the automatic welding machine unit are connected; a shielding unit is installed outside the radiation environment to shield the radiation of the radiation environment; a maintenance unit is arranged outside the radiation environment to maintain the welding unit; a channel (20) passes through the shielding unit to connect the welding unit and the maintenance unit, so that the welding unit moves between the radiation environment and the maintenance unit, when the parts in the radiation environment need to be welded, the trolley is opened into the radiation environment, when maintenance is needed, the trolley is opened into the maintenance unit, so that the welding station and the maintenance station are connected together, simplifying the remote indirect welding and maintenance operation; the shielding unit comprises a shielding lifting door, the shielding lifting door comprises a hot chamber end shielding lifting door and a maintenance end shielding lifting door, the hot chamber end shielding lifting door is located at the hot chamber end of the channel (20), and the maintenance end shielding lifting door is located at the maintenance end of the channel (20); a working mode, after welding is completed, the trolley motor (23) is started to drive the trolley body (5) to move from above the support (4) of the waste barrel in the hot chamber to the channel (20) in the hot chamber wall; a maintenance mode, after the maintenance work is completed, the trolley motor (23) is started to drive the trolley body (5) to move from the maintenance station in the maintenance glove box (17) along the track (21) to the channel (20).

2. The welding device of claim 1, wherein, The radiation environment is a hot chamber, the hot chamber comprises a containing space and a wall body, the containing space is used for containing the parts; the wall body can be installed with the channel (20), so that the channel (20) connects the hot chamber and the maintenance unit.

3. The welding device of claim 2, wherein, The trolley unit comprises the trolley body (5) and the track (21), the track (21) is laid in the channel (20), the track (21) comprises a hot chamber end and a maintenance end, and the trolley body (5) can move along the track (21) from the hot chamber end to the maintenance end.

4. The welding device of claim 3, wherein, The trolley unit further comprises an emergency recovery mechanism (30), which is arranged at the hot chamber end of the track (21) to recover the trolley body (5) in an emergency in case of failure of the trolley body (5).

5. The welding device of claim 4, wherein, The automatic welding machine unit comprises a welding gun assembly, a motion turntable (8), a turntable driving mechanism (9) and a rotary motor (10), the welding gun assembly is connected with the motion turntable (8), the turntable driving mechanism (9) is connected with the rotary motor (10) and the motion turntable (8) respectively, so as to transmit the power of the rotary motor (10) to the motion turntable (8).

6. The welding device of claim 5, wherein, The hot cell end shield lifting door comprises an inner door plate (12) and an inner guide rail (13), the inner door plate (12) moves along the inner guide rail (13); the maintenance end shield lifting door comprises an outer door plate (31) and an outer guide rail (28), the outer door plate (31) moves along the outer guide rail (28).

7. The welding device of claim 6, wherein, The hot cell end shield lifting door and the maintenance end shield lifting door further comprise a power unit and a first through-wall penetrating member (15), the power unit is arranged outside the hot cell, the power unit operates the inner door plate (12) and the outer door plate (31) to move along the inner guide rail (13) and the outer guide rail (28) respectively through the first through-wall penetrating member (15), so as to drive the inner door plate (12) to close and open the hot cell end of the passage (20); or to close and open the maintenance end of the passage (20).

8. The welding device of claim 7, wherein, The first through-wall penetrating member (15) is fixed in the wall of the hot cell.

9. The welding device of claim 8, wherein, The maintenance unit comprises a maintenance glove box (17) and a test unit (33), the maintenance glove box (17) communicates with the hot cell through the passage (20).

10. The welding device of claim 9, wherein, The maintenance glove box (17) comprises a plurality of sealing gloves arranged in length and height positions.

11. The welding device of claim 10, wherein, The test unit (33) is arranged in the maintenance glove box (17).

12. The welding device of claim 11, wherein, The welding device further comprises a lifting unit, the lifting unit comprises a jacking drive mechanism (24), a lifting platform (3) and a support (4), the jacking drive mechanism (24) is fixed at the bottom of the hot cell, the lifting platform (3) is connected with the jacking drive mechanism (24) and the support (4), and the support (4) can fix the part.

13. The welding device of claim 12, wherein, The welding device further comprises a control unit, the control unit is used for controlling the movement of one or more of the trolley unit, the automatic welding machine unit, the lifting unit, the hot cell end shield lifting door and the maintenance end shield lifting door.

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