A double-pipe hoisting device for irradiation device loading and unloading and a method of using the same

Abstract

The application belongs to the technical field of loading and unloading of pool type reactor irradiation devices, and particularly relates to a use method of a double-layer pipe type hoisting device for loading and unloading of irradiation devices, which comprises an inner layer pipe and an outer layer pipe, the inner layer pipe is arranged inside the outer layer pipe, the upper end of the inner layer pipe is clamped with the upper end of the outer layer pipe, the lower end of the inner layer pipe is clamped with the lower end of the outer layer pipe, the lower end of the inner layer pipe is connected with a grabbing head, and the hoisting head is used for detachable connection with the irradiation device. The double-layer pipe design can make the inner and outer layer pipes work cooperatively, effectively improve the rigidity and stability of the device, reduce the deformation and errors generated in the hoisting process, the torsion plate additionally arranged can not only transmit greater torque, but also provide axial limiting function for the inner layer pipe and the grabbing head, prevent the grabbing head from accidentally falling, and enhance the safety of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pool type reactor irradiation device loading and unloading, in particular to a method for using a double-layer pipe type hoisting device for irradiation device loading and unloading. BACKGROUND

[0002] With the rapid development of nuclear industry technology, the application of irradiation devices in nuclear reactors becomes more and more common. However, the loading and unloading operation of irradiation devices in small-diameter and deep-well type pipelines is a task with high technical requirements. Such operation usually requires equipment with high precision and high stability, while the safety of the operator and the reliability of the device need to be considered. In general, the assembly of the irradiation device is a high-precision, difficult-to-operate and low-fault-tolerant engineering. During the trial assembly, installation, disassembly and reassembly of the irradiation device, the traditional steel wire rope suspension is usually used. During the loading and unloading process, the rigidity is poor and the precision is low, and the irradiation device often needs to be repeatedly centered to be installed at the designated position. Moreover, the steel wire rope cannot be disassembled and needs to be hoisted out again after the irradiation test is completed. Due to the poor controllability of the steel wire rope itself, the lack of fixed binding standards and the large anisotropy of the steel wire material after irradiation, the risk is multiplied during the use of the steel wire rope hoisting process, and it is impossible to stably and reliably ensure the safety and reliability of the irradiation device during the loading and unloading process. SUMMARY

[0003] The technical problem to be solved by the present application is that the loading and unloading of irradiation devices in small-diameter and deep-well type pipelines is difficult, and the purpose is to provide a method for using a double-layer pipe type hoisting device for irradiation device loading and unloading, which realizes the stable loading and unloading of the irradiation device.

[0004] The present application is implemented by the following technical solutions:

[0005] A double-layer pipe type hoisting device for irradiation device loading and unloading, comprising: an inner layer pipe and an outer layer pipe, the inner layer pipe is arranged inside the outer layer pipe, the upper end of the inner layer pipe is clamped with the upper end of the outer layer pipe, the lower end of the inner layer pipe is clamped with the lower end of the outer layer pipe, the lower end of the inner layer pipe is connected with a grabbing head, and the hoisting head is used for detachable connection with the irradiation device.

[0006] Optionally, the inner layer pipe comprises: an inner grabbing head, an inner grabbing head handle, an inner connecting pipe and the grabbing head, the lower end of the inner grabbing head is connected with the upper end of the inner connecting pipe, the lower end of the inner connecting pipe is connected with the grabbing head, and the inner grabbing head handle is connected with the outer side surface of the inner grabbing head.

[0007] Optionally, the inner grabbing head, the inner connecting pipe and the grabbing head are coaxially arranged, and the inner grabbing head handle is arranged along the radius extension line of the inner grabbing head.

[0008] Optionally, the grabbing head comprises a rod body and a claw body, the upper end of the rod body is coaxially fixedly connected with the lower end of the inner connecting pipe, the claw body is fixedly connected with the side surface of the rod body, and the central axis of the claw body is arranged perpendicularly to the central axis of the rod body.

[0009] Specifically, the outer layer pipe comprises an outer grabbing head, an outer grabbing head handle, an outer connecting pipe, a lower connector and a torsion plate, the lower end of the outer grabbing head is connected with the upper end of the outer connecting pipe, the torsion plate is connected with the lower end of the outer connecting pipe through the lower connector, the inner grabbing head is arranged in the outer grabbing head, the inner connecting pipe is arranged in the inner connecting pipe, and a through hole is arranged on the outer grabbing head for the inner grabbing head handle to pass through.

[0010] The rod body is provided with a through groove, and the torsion plate is arranged in the through groove.

[0011] Optionally, the lower end of the lifting head is connected with an irradiation device, the upper end of the lifting head is provided with a lifting groove matched with the claw body, the lifting groove comprises a vertical groove and a horizontal groove, the upper end of the vertical groove is in communication with the upper end face of the lifting sleeve, the horizontal groove is arranged on the side surface of the lifting head, and the lower end of the vertical groove is in communication with the first end of the horizontal groove.

[0012] Optionally, the through groove coincides with the diameter of the rod body, the torsion plate passes through the through groove, the lower end of the lower connector is provided with a clamping groove matched with the torsion plate, and the upper end of the torsion plate is clamped in the clamping groove.

[0013] Further, the lifting device further comprises an operation table for fixing the lifting device at the mouth of the irradiation pipeline, the operation table comprises an operation support, an operation support plate and a positioning column, the lower end of the operation support is fixedly connected with the upper side surface of the operation support plate, the upper end of the positioning column is fixedly connected with the lower side surface of the operation support plate, the outer grabbing head is arranged in the operation support, and the operation support provides upward supporting force for the outer grabbing head handle.

[0014] Specifically, the upper end of the operation support is provided with a recess, the outer grabbing head handle is placed in the recess, the recess is provided with a first placing groove and a second placing groove in the circumferential direction, and the length of the horizontal groove is equal to the distance between the first placing groove and the second placing groove.

[0015] A use method of a double-layer pipe type lifting device for loading and unloading an irradiation device, which is based on the double-layer pipe type lifting device for loading and unloading an irradiation device as described above, the use method comprises the following steps:

[0016] Lowering the lifting device so that the claw body moves downward from the upper end of the vertical groove to the lower end of the vertical groove.

[0017] Torque is applied to the outer and inner grab head handles, causing the claw body to move from the first end of the transverse slot to the second end of the transverse slot.

[0018] The lifting device moves the lifting head upward by the claw body.

[0019] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0020] The inner layer pipe is provided with an inner grab head, an inner grab head handle, an inner connector pipe and a grabbing head, and the inner grab head and the grabbing head are used for grabbing, installing and dismounting the irradiation device; the outer layer pipe includes an outer grab head, an outer grab head handle, an outer connector pipe, a lower connector and a torsion plate, the outer grab head drives the inner layer pipe to rotate and lift through the outer grab head handle, and the torsion plate is used for transmitting torque and axially limiting the grabbing head.

[0021] The double-layer pipe design can make the inner and outer layer pipes work cooperatively, effectively improve the rigidity and stability of the device, reduce the deformation and error generated in the lifting process, and the torsion plate not only can transmit greater torque, but also provides axial limiting function for the inner layer pipe and the grabbing head, prevents the grabbing head from accidentally falling, and enhances the safety of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the present application. These drawings should not be considered limiting in scope of the present application, but provide what is believed to be the most useful and readily understood description of the embodiments of the application.

[0023] Figure 1 is a structural schematic diagram of a double-layer pipe lifting device for irradiation device mounting and dismounting according to the present application.

[0024] Figure 2 is a structural schematic diagram of an inner layer pipe according to the present application.

[0025] Figure 3 is a structural schematic diagram of an outer layer pipe according to the present application.

[0026] Figure 4 is a structural schematic diagram of an operation table according to the present application.

[0027] Figure 5 is an operation schematic diagram of a lifting device according to the present application.

[0028] Figure 6 is a principle schematic diagram of a lifting device according to the present application.

[0029] Figure 7 is a structural schematic diagram of a grabbing head according to the present application.

[0030] Figure 8 is a schematic diagram of the method for using the hoisting device according to the present application.

[0031] Figure 9 is a schematic diagram of the method for using the hoisting device according to the present application.

[0032] Fig. 1 is a schematic diagram of the method for using the hoisting device according to the present application. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, and are not a limitation to the present application.

[0034] It should be further noted that, for the convenience of description, only the parts related to the present application are shown in the drawings.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “fixing” and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise explicitly specified and limited, the first feature “on” or “under” the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature “on”, “above” and “on the surface of” the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature “under”, “below” and “under” the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] 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 the embodiments.

[0038] Embodiment One

[0039] As shown in Figure 1 , Figure 5 , Figure 6 and Figure 9 , a double-layer tube type lifting device for irradiation device loading and unloading is provided, comprising: an inner layer tube 1 and an outer layer tube 2, the inner layer tube 1 is arranged inside the outer layer tube 2, the upper end of the inner layer tube 1 is clamped with the upper end of the outer layer tube 2, the lower end of the inner layer tube 1 is clamped with the lower end of the outer layer tube 2, the lower end of the inner layer tube 1 is connected with a grabbing head 14, and a lifting head 4 is used for detachable connection with the irradiation device.

[0040] The inner layer tube 1 is arranged inside the outer layer tube 2, and the two are clamped and fixed at the upper end and the lower end respectively, ensuring that the relative positions of the two layers of tubes remain stable during use. The grabbing head 14 at the lower end of the inner layer tube 1 is used to grab and fix the irradiation device, and the lifting head 4 is adapted to the grabbing head 14, and the detachable connection of the irradiation device is realized by the connection and separation of the grabbing head 14 and the lifting head 4.

[0041] The traditional single-layer tube structure is prone to twisting and bending deformation during lifting, resulting in reduced operation precision. The double-layer tube structure adopted in this embodiment can significantly improve the torsional and bending resistance of the inner layer tube 1 through the support of the outer layer tube 2.

[0042] That is, the design principle of the double-layer tube is to utilize the synergistic effect of the inner layer tube 1 and the outer layer tube 2 to improve the overall rigidity and stability of the lifting device. The inner layer tube 1 is located inside the outer layer tube 2 and is connected by clamping to form a whole structure system. The two ends of the inner layer tube 1 and the two ends of the outer layer tube 2 are clamped, which can effectively enhance the rigidity of the device, reduce the deformation and errors that may occur during lifting, and improve the operation precision and safety of the device.

[0043] At the same time, the outer layer tube 2 can also provide additional support and protection to the inner layer tube 1, avoid damaging the inner layer tube 1, protect the inner layer tube 1 from the influence of the external environment, and prolong the service life of the device.

[0044] Embodiment Two

[0045] A double-layer tube type lifting device for irradiation device loading and unloading is provided, comprising: an inner layer tube 1 and an outer layer tube 2, the inner layer tube 1 is arranged inside the outer layer tube 2, the upper end of the inner layer tube 1 is clamped with the upper end of the outer layer tube 2, the lower end of the inner layer tube 1 is clamped with the lower end of the outer layer tube 2, the lower end of the inner layer tube 1 is connected with a grabbing head 14, and a lifting head 4 is used for detachable connection with the irradiation device.

[0046] As shown in Figure 2 , Figure 5 , Figure 7 , the structure of the inner layer tube 1 is provided in this embodiment.

[0047] The inner layer pipe 1 comprises an inner grab head 11, an inner grab head handle 12, an inner adapter pipe 13 and a grab head 14, the lower end of the inner grab head 11 is connected with the upper end of the inner adapter pipe 13, the lower end of the inner adapter pipe 13 is connected with the grab head 14, and the inner grab head handle 12 is connected with the outer side of the inner grab head 11.

[0048] The inner grab head 11, the inner adapter pipe 13 and the grab head 14 are coaxially arranged, and the inner grab head handle 12 is arranged along the radius extension line of the inner grab head 11.

[0049] The grab head 14 comprises a rod body 141 and a claw body 142, the upper end of the rod body 141 is fixedly connected with the lower end of the inner adapter pipe 13 coaxially, the claw body 142 is fixedly connected with the side of the rod body 141, and the central axis of the claw body 142 is arranged perpendicularly to the central axis of the rod body 141.

[0050] The lower end of the inner grab head 11 is connected with the upper end of the inner adapter pipe 13, usually by welding or other firm connection mode, to ensure that it will not be loose during use. The inner grab head handle 12 is connected to the outer side of the inner grab head 11 and arranged along the radius extension line of the inner grab head 11, so as to facilitate the operator to apply torque and control the rotation of the inner grab head 11. The length of the inner adapter pipe 13 is customized according to specific conditions, which can realize the loading and unloading of the 5-20m deep irradiation device.

[0051] The claw body 142 on the grab head 14 can cooperate with the lifting head 4 to realize lifting, and the specific structure of the lifting head 4 is described in the following embodiment.

[0052] Embodiment three

[0053] A double-layer pipe type lifting device for loading and unloading of an irradiation device, comprising an inner layer pipe 1 and an outer layer pipe 2, the inner layer pipe 1 is arranged inside the outer layer pipe 2, the upper end of the inner layer pipe 1 is clamped with the upper end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is clamped with the lower end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is connected with a grab head 14, and a lifting head 4 is used for detachable connection with the irradiation device.

[0054] As shown in Figure 3 , Figure 5 , Figure 9 The outer layer pipe 2 comprises an outer grab head 21, an outer grab head handle 22, an outer adapter pipe 23, a lower adapter 24 and a torsion plate 25, the lower end of the outer grab head 21 is connected with the upper end of the outer adapter pipe 23, the torsion plate 25 is connected with the lower end of the outer adapter pipe 23 through the lower adapter 24, the inner grab head 11 is arranged in the outer grab head 21, the inner adapter pipe 13 is arranged in the inner adapter pipe 13, and a through hole is arranged on the outer grab head 21 for the inner grab head handle 12 to pass through; a through slot is arranged on the rod body 141, and the torsion plate 25 is arranged in the through slot.

[0055] The through slot coincides with the diameter of the rod body 141, the torsion plate 25 passes through the through slot, and the lower end of the lower joint 24 is provided with a clamping groove matched with the torsion plate 25, and the upper end of the torsion plate 25 is clamped in the clamping groove.

[0056] The lower end of the outer grab head 21 is connected with the upper end of the outer connecting pipe 23, and welding or other firm connection mode is used to ensure that the outer grab head 21 and the outer connecting pipe 23 will not be loose during use. The outer grab head 21 is provided with a through hole for the inner grab head handle 12 to pass through, thereby fixing the inner grab head 11 and the outer grab head 21, and at the same time, the outer grab head handle 22 is connected to the outer side of the outer grab head 21, so that the operator can apply torque to the inner grab head 11 through the inner grab head handle 12, and at the same time, the operator can also apply torque to the outer grab head 21 through the outer grab head handle 22. The outer connecting pipe 23 provides structural support and transmits torque through the lower joint 24 and the torsion plate 25, and can also be customized according to the length of the inner connecting pipe 13.

[0057] The lower joint 24 connects the lower end of the outer connecting pipe 23 with the torsion plate 25 to ensure the stability of torque transmission, and the torsion plate 25 is connected with the lower end of the outer connecting pipe 23 through the lower joint 24 and is arranged in the through slot of the inner layer pipe 1. The torque is transmitted to the inner layer pipe 1 through the through slot, and the inner layer pipe 1 is axially limited to prevent the inner layer pipe 1 from accidentally falling off during operation.

[0058] The outer grab head 21 and the outer connecting pipe 23 can ensure the stable position of the inner layer pipe 1 in the outer layer pipe 2. The through hole on the outer grab head 21 allows the inner grab head handle 12 to pass through, thereby realizing direct operation of the inner layer pipe 1.

[0059] The operator applies torque through the outer grab head handle 22, and the outer grab head 21 drives the outer connecting pipe 23 to rotate. The rotating torque is transmitted to the torsion plate 25 through the lower joint 24, and the torsion plate 25 transmits the torque to the inner layer pipe 1 through the through slot. At the same time, the operator also applies torque through the inner grab head handle 12, and the inner grab head 11 drives the inner connecting pipe 13 to rotate. The outer layer pipe 2 and the inner layer pipe 1 realize torque transmission through the upper and lower ends, which reduces the possible deformation of the inner layer pipe 1 and increases the accuracy.

[0060] Finally, the torsion plate 25 is arranged in the through slot of the inner layer pipe 1, and through mechanical cooperation, not only the torque is transmitted, but also the axial limiting function is provided to prevent the inner layer pipe 1 from accidentally falling off during operation, thereby enhancing the safety of the device.

[0061] Example Four

[0062] A double-layer pipe hoisting device for loading and unloading irradiation devices, comprising: an inner layer pipe 1 and an outer layer pipe 2, the inner layer pipe 1 is arranged inside the outer layer pipe 2, the upper end of the inner layer pipe 1 is clamped with the upper end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is clamped with the lower end of the outer layer pipe 2, and the lower end of the inner layer pipe 1 is connected with a grab head 14, and a hoisting head 4 is used for detachable connection with the irradiation device.

[0063] The inner layer pipe 1 comprises an inner grab head 11, an inner grab head handle 12, an inner adapter pipe 13 and a grab head 14, the lower end of the inner grab head 11 is connected with the upper end of the inner adapter pipe 13, the lower end of the inner adapter pipe 13 is connected with the grab head 14, and the inner grab head handle 12 is connected with the outer side of the inner grab head 11.

[0064] The inner grab head 11, the inner adapter pipe 13 and the grab head 14 are coaxially arranged, and the inner grab head handle 12 is arranged along the radius extension line of the inner grab head 11.

[0065] The grab head 14 comprises a rod body 141 and a claw body 142, the upper end of the rod body 141 is fixedly connected with the lower end of the inner adapter pipe 13, the claw body 142 is fixedly connected with the side of the rod body 141, and the central axis of the claw body 142 is arranged perpendicularly to the central axis of the rod body 141.

[0066] As shown in Figure 8 , the hoisting head 4 is a component for connecting the hoisting device and the irradiation device, so the lower end of the hoisting head 4 is connected with the irradiation device, and the upper end of the hoisting head 4 is provided with a hoisting groove matched with the claw body 142, the hoisting groove comprises a vertical groove and a horizontal groove, the upper end of the vertical groove is in communication with the upper end face of the hoisting sleeve, the horizontal groove is arranged on the side of the hoisting head 4, and the lower end of the vertical groove is in communication with the first end of the horizontal groove.

[0067] The upper end of the vertical groove is in communication with the upper end face of the hoisting head 4, for guiding the claw body 142 to enter the hoisting groove from the upper end. The groove is arranged on the side of the hoisting head 4, the lower end of the vertical groove is in communication with the first end of the horizontal groove, the claw body 142 moves from the vertical groove to the first end of the horizontal groove, and then is locked by moving horizontally to the second end of the horizontal groove.

[0068] Then the irradiation device can be lifted by moving the entire hoisting device upward.

[0069] In addition, in order to increase the stability between the claw body 142 and the hoisting groove, a short vertical groove can be arranged at the second end of the horizontal groove, and after the claw body 142 moves to the second end of the horizontal groove, it can be slightly moved upward to clamp the claw body 142.

[0070] As shown in Figure 8 , the number of claw bodies 142 is four, which is a cross head structure. In practice, the grab head 14 can be replaced by two-claw type, three-claw type, six-claw type and other different forms to be suitable for more test working conditions.

[0071] Example Five

[0072] A double-layer pipe hoisting device for irradiation device loading and unloading, comprising: an inner layer pipe 1 and an outer layer pipe 2, the inner layer pipe 1 is arranged inside the outer layer pipe 2, the upper end of the inner layer pipe 1 is clamped with the upper end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is clamped with the lower end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is connected with a grabbing head 14, and a hoisting head 4 is used for detachable connection with the irradiation device.

[0073] The outer layer pipe 2 comprises: an outer grabbing head 21, an outer grabbing head handle 22, an outer connecting pipe 23, a lower connector 24 and a torsion plate 25, the lower end of the outer grabbing head 21 is connected with the upper end of the outer connecting pipe 23, the torsion plate 25 is connected with the lower end of the outer connecting pipe 23 through the lower connector 24, the inner grabbing head 11 is arranged inside the outer grabbing head 21, the inner connecting pipe 13 is arranged inside the inner connecting pipe 13, and a through hole is arranged on the outer grabbing head 21 for the inner grabbing head handle 12 to pass through; a through slot is arranged on the rod body 141, and the torsion plate 25 is arranged in the through slot.

[0074] The through slot coincides with the diameter of the rod body 141, the torsion plate 25 passes through the through slot, the lower end of the lower connector 24 is provided with a clamping groove matched with the torsion plate 25, and the upper end of the torsion plate 25 is clamped in the clamping groove.

[0075] As shown in Figure 1 , Figure 4 , Figure 5 The hoisting device further comprises an operating table 3 for fixing the hoisting device at the irradiation pipe opening, the operating table 3 comprises: an operating support 31, an operating support plate 32 and a positioning column 33, the lower end of the operating support 31 is fixedly connected with the upper side of the operating support plate 32, the upper end of the positioning column 33 is fixedly connected with the lower side of the operating support plate 32, the outer grabbing head 21 is arranged in the operating support 31, and the operating support 31 provides upward supporting force for the outer grabbing head handle 22.

[0076] The operating table 3 is an important component of the hoisting device, mainly used for fixing the hoisting device and providing supporting and positioning functions. The operating support 31 is a structural component for supporting the outer grabbing head 21, and the lower end of the operating support 31 is fixedly connected with the upper side of the operating support plate 32, so as to ensure the stability of the operating support 31 during use.

[0077] The operating support plate 32 is the basic structure of the operating table 3, used for supporting and connecting the operating support 31 and the positioning column 33. The positioning column 33 ensures the accurate positioning and fixing of the operating table 3 at the irradiation pipe opening, preventing the operating table 3 from deviating during use.

[0078] The positioning column 33 can be a cylindrical positioning column 33 or a conical positioning column 33 in practice, or can be of other shapes, which can be suitable for more test occasions. The positioning column 33 is matched with the connecting flange of the irradiation passage opening, so as to fix the entire operating table 3. The positioning column 33 or the pin can also be replaced with a cylindrical positioning column 33 to realize the positioning and supporting of the operating table 3.

[0079] In order to limit the rotation angle, a recess is arranged at the upper end of the operating support 31, and the outer claw handle 22 is placed in the recess. The recess is provided with a first placement groove and a second placement groove in the circumferential direction, and the length of the horizontal groove is equal to the distance between the first placement groove and the second placement groove.

[0080] That is, when the claw body 142 is located in the vertical groove, the outer claw handle 22 is located above the first placement groove, and when the claw body 142 is located at the second end of the horizontal groove, the outer claw handle 22 is located above the second placement groove. The outer claw handle 22 is placed in the recess, and through the cooperation of the first placement groove and the second placement groove, the outer claw handle 22 is ensured not to be displaced during operation, thereby improving the accuracy and safety of operation.

[0081] The operating table 3 not only provides the functions of fixation and support, but also ensures the positioning and stability of the outer claw handle 22 through the structural design of the recess and the placement groove. This multi-level fixation and support design makes the lifting device more safe and efficient during the loading and unloading of the irradiation device.

[0082] Embodiment six

[0083] A double-layer pipe lifting device for loading and unloading an irradiation device, comprising: an inner layer pipe 1 and an outer layer pipe 2, the inner layer pipe 1 is arranged inside the outer layer pipe 2, the upper end of the inner layer pipe 1 is clamped with the upper end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is clamped with the lower end of the outer layer pipe 2, the lower end of the inner layer pipe 1 is connected with a grabbing head 14, and a lifting head 4 is used for detachable connection with the irradiation device.

[0084] The inner layer pipe 1 comprises: an inner claw 11, an inner claw handle 12, an inner connector pipe 13 and a grabbing head 14, the lower end of the inner claw 11 is connected with the upper end of the inner connector pipe 13, the lower end of the inner connector pipe 13 is connected with the grabbing head 14, and the inner claw handle 12 is connected with the outer side of the inner claw 11.

[0085] The grabbing head 14 comprises: a rod body 141 and a claw body 142, the upper end of the rod body 141 is fixedly connected with the lower end of the inner connector pipe 13 coaxially, the claw body 142 is fixedly connected with the side of the rod body 141, and the central axis of the claw body 142 is arranged perpendicularly to the central axis of the rod body 141.

[0086] The outer layer pipe 2 comprises: an outer claw 21, an outer claw handle 22, an outer connector pipe 23, a lower connector 24 and a torsion plate 25, the lower end of the outer claw 21 is connected with the upper end of the outer connector pipe 23, the torsion plate 25 is connected with the lower end of the outer connector pipe 23 through the lower connector 24, the inner claw 11 is arranged in the outer claw 21, the inner connector pipe 13 is arranged in the inner connector pipe 13, and a through hole is arranged on the outer claw 21 for the inner claw handle 12 to pass through; a through slot is arranged on the rod body 141, and the torsion plate 25 is arranged in the through slot.

[0087] The lifting head 4 is a component for connecting the lifting device and the irradiation device, so the lower end of the lifting head 4 is connected to the irradiation device, and the upper end of the lifting head 4 is provided with a lifting groove matched with the claw body 142, which includes a vertical groove and a horizontal groove, the upper end of the vertical groove is in communication with the upper end face of the lifting sleeve, and the horizontal groove is arranged on the side surface of the lifting head 4, and the lower end of the vertical groove is in communication with the first end of the horizontal groove.

[0088] The upper end of the vertical groove is in communication with the upper end face of the lifting head 4, and is used to guide the claw body 142 to enter the lifting groove from the upper end. The groove is arranged on the side surface of the lifting head 4, and the lower end of the vertical groove is in communication with the first end of the horizontal groove, and the claw body 142 moves from the lower end of the vertical groove to the first end of the horizontal groove, and then moves horizontally to the second end of the horizontal groove to complete the locking.

[0089] A method for using a double-layer pipe type lifting device for loading and unloading an irradiation device, which is based on the double-layer pipe type lifting device for loading and unloading an irradiation device as described above, and the method comprises the following steps:

[0090] Lowering the lifting device, so that the claw body 142 moves from the upper end of the vertical groove to the lower end of the vertical groove; the vertical groove is designed to guide the vertical movement of the claw body 142, and through this process, the claw body 142 can accurately enter the predetermined position of the lifting head 4.

[0091] Applying torque to the outer claw head handle 22 and the inner claw head handle 12, so that the claw body 142 moves from the first end of the horizontal groove to the second end of the horizontal groove; the horizontal groove is arranged on the side surface of the lifting head 4 and is connected to the lower end of the vertical groove. By applying torque, the claw body 142 moves horizontally from the lower end of the vertical groove to the second end of the horizontal groove, which ensures that the claw body 142 is firmly locked in the lifting head 4, thereby ensuring the stability of the gripping.

[0092] After the locking of the claw body 142 is completed, the claw body 142 of the inner layer pipe 1 has firmly gripped the lifting head 4, and the lifting device is raised at this time, so that the claw body 142 can be clamped into the short vertical groove, and the lifting head 4 is moved upward by the claw body 142, thereby completing the lifting of the irradiation device.

[0093] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the skilled person in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.

[0094] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly pointing to the number of technical features indicated. Thus, features defined with "first", "second" etc. can include at least one of such features, either explicitly or implicitly. In the description of the application, the meaning of "plurality" is at least two, e.g. two, three, etc., unless explicitly specified otherwise.

[0095] Those skilled in the art will understand that the above described embodiments are merely intended to clarify the present application, and are not intended to limit the scope of the present application. Other changes or modifications can be made by those skilled in the art based on the above described application, and such changes or modifications are still within the scope of the present application.

Claims

1. A double-layer tubular hoisting device for loading and unloading irradiation equipment, characterized in that, include: The inner tube (1) and the outer tube (2) are arranged inside the outer tube (2). The upper end of the inner tube (1) is snapped with the upper end of the outer tube (2), and the lower end of the inner tube (1) is snapped with the lower end of the outer tube (2). The lower end of the inner tube (1) is connected to a gripping head (14). The lifting head (4) is used for detachable connection with the irradiation device. The inner tube (1) includes: an inner gripper (11), an inner gripper handle (12), an inner tube (13), and a gripping head (14). The lower end of the inner gripper (11) is connected to the upper end of the inner tube (13), and the lower end of the inner tube (13) is connected to the gripping head (14). The inner gripper handle (12) is connected to the outer side of the inner gripper (11). The gripping head (14) includes: a rod (141) and a claw (142). The upper end of the rod (141) is coaxially fixedly connected to the lower end of the inner tube (13). The claw (142) is fixedly connected to the side of the rod (141), and the central axis of the claw (142) is perpendicular to the central axis of the rod (141). The outer tube (2) includes: an outer gripper (21), an outer gripper handle (22), an outer tube (23), a lower connector (24), and a torsion plate (25). The lower end of the outer gripper (21) is connected to the upper end of the outer tube (23). The torsion plate (25) is connected to the lower end of the outer tube (23) through the lower connector (24). The inner gripper (11) is disposed inside the outer gripper (21). The inner tube (13) is disposed inside the outer tube (23). The outer gripper (21) is provided with a through hole for the inner gripper handle (12) to pass through. The rod body (141) is provided with a through groove, and the torsion plate (25) is disposed in the through groove. It also includes an operating table (3), which is used to fix the hoisting device at the irradiation pipe opening. The operating table (3) includes an operating bracket (31), an operating support plate (32), and a positioning column (33). The lower end of the operating bracket (31) is fixedly connected to the upper side of the operating support plate (32), and the upper end of the positioning column (33) is fixedly connected to the lower side of the operating support plate (32). The external gripper (21) is disposed inside the operating bracket (31), and the operating bracket (31) provides an upward supporting force to the handle (22) of the external gripper.

2. The double-layer tubular hoisting device for loading and unloading irradiation equipment according to claim 1, characterized in that, The inner gripper (11), the inner tube (13), and the gripping head (14) are coaxially arranged, and the inner gripper handle (12) is arranged along the radius extension line of the inner gripper (11).

3. A double-layer tubular hoisting device for loading and unloading irradiation equipment according to claim 1, characterized in that, The lower end of the lifting head (4) is connected to the irradiation device, and the upper end of the lifting head (4) is provided with a lifting groove adapted to the claw body (142). The lifting groove includes a vertical groove and a horizontal groove. The upper end of the vertical groove is connected to the upper end face of the lifting sleeve. The horizontal groove is provided on the side of the lifting head (4), and the lower end of the vertical groove is connected to the first end of the horizontal groove.

4. A double-layer tubular hoisting device for loading and unloading irradiation equipment according to claim 3, characterized in that, The diameter of the through groove coincides with that of the rod (141), the torsion plate (25) passes through the through groove, the lower end of the lower connector (24) is provided with a slot adapted to the torsion plate (25), and the upper end of the torsion plate (25) is engaged in the slot.

5. A double-layer tubular hoisting device for loading and unloading irradiation equipment according to claim 3, characterized in that, The upper end of the operating bracket (31) is provided with a groove, and the outer gripper handle (22) is placed in the groove. The groove is provided with a first placement groove and a second placement groove in the circumferential direction. The length of the horizontal groove is equal to the distance between the first placement groove and the second placement groove.

6. A method of using a double-layer tubular hoisting device for loading and unloading irradiation equipment, characterized in that, Based on the double-layer tubular hoisting device for loading and unloading irradiation devices as described in any one of claims 1-5, the method of use includes: The hoisting device is lowered so that the claw (142) moves from the upper end of the vertical groove to the lower end of the vertical groove; Torque is applied to the outer gripper handle (22) and the inner gripper handle (12) to move the claw body (142) from the first end of the transverse groove to the second end of the transverse groove; The lifting device moves the lifting head (4) upward through the claw body (142).

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