Double-layer tubular hoisting device for loading and unloading irradiation device and use method of double-layer tubular hoisting device

Abstract

The invention relates to the technical field of loading and unloading of a swimming pool type reactor irradiation device, in particular to a using method of a double-layer tubular hoisting device for loading and unloading of an irradiation device, the hoisting device comprises an inner-layer tube and an outer-layer tube, the inner-layer tube is arranged in the outer-layer tube, the upper end of the inner-layer tube is connected with the upper end of the outer-layer tube in a clamped mode, and the outer-layer tube is connected with the inner-layer tube in a clamped mode. 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 being detachably connected with an irradiation device; by means of the double-layer pipe design, the inner-layer pipe and the outer-layer pipe can work cooperatively, the rigidity and stability of the device are effectively improved, deformation and errors generated in the hoisting process are reduced, in addition, the arranged torsion plate can transmit larger torque, the axial limiting function is provided for the inner-layer pipe and the grabbing head, the grabbing head is prevented from falling off accidentally, and the safety of the device is improved. And the safety of the device is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of loading and unloading a swimming pool type reactor irradiation device, and in particular to a method for using a double-layer tube type hoisting device for loading and unloading an irradiation device. Background Art

[0002] With the rapid development of nuclear industry technology, the application of irradiation devices in nuclear reactors has become more and more common. However, loading and unloading irradiation devices in small-diameter, deep-well pipelines is a task with high technical requirements. This type of operation usually requires the equipment to have high precision and high stability, and at the same time, it is necessary to consider the safety of the operator and the reliability of the device. In short, the assembly of irradiation devices is a project with high precision requirements, high difficulty in operation, and low fault tolerance. In the process of trial installation, installation, disassembly and reinstallation of irradiation devices, traditional wire rope suspension is usually used. During the loading and unloading process, the rigidity is poor and the precision is low. It is often necessary to repeatedly align the irradiation device to install it in the specified position, and the wire rope cannot be disassembled. The device needs to be hoisted out again after the irradiation test is completed. In addition, due to the poor controllability of the wire rope itself, the lack of fixed binding standards, and the large anisotropy of the wire material after irradiation, the risk is doubled in the process of using wire rope hoisting, and the safety and reliability of the loading and unloading process of the irradiation device cannot be stably and reliably guaranteed. Summary of the invention

[0003] The technical problem to be solved by the present invention is that it is difficult to load and unload an irradiation device in a small-diameter, deep-well pipeline. The purpose is to provide a method for using a double-layer pipe lifting device for loading and unloading an irradiation device, thereby achieving stable loading and unloading of the irradiation device.

[0004] The present invention is achieved through the following technical solutions:

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

[0006] Optionally, the inner layer tube includes: an inner gripping head, an inner gripping head handle, an inner tube and the grabbing head, the lower end of the inner gripping head is connected to the upper end of the inner tube, the lower end of the inner tube is connected to the grabbing head, and the inner gripping head handle is connected to the outer side surface of the inner gripping head.

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

[0008] Optionally, the grabbing head includes: a rod body and a claw body, the upper end of the rod body is coaxially fixedly connected to the lower end of the inner tube, the claw body is fixedly connected to the side of the rod body, and the central axis of the claw body is perpendicular to the central axis of the rod body.

[0009] Specifically, the outer tube includes: an outer gripping head, an outer gripping head handle, an outer tube, a lower joint and a torque plate, the lower end of the outer gripping head is connected to the upper end of the outer tube, the torque plate is connected to the lower end of the outer tube through the lower joint, the inner gripping head is arranged in the outer gripping head, the inner tube is arranged in the inner tube, and a through hole is arranged on the outer gripping head for the inner gripping head handle to pass through;

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

[0011] Optionally, the lower end of the lifting head is connected to the irradiation device, and the upper end of the lifting head is provided with a lifting groove adapted to the claw body, and 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 arranged on the side of the lifting head, and the lower end of the vertical groove is connected to the first end of the horizontal groove.

[0012] Optionally, the through slot coincides with the diameter of the rod body, the torsion plate passes through the through slot, the lower end of the lower joint is provided with a slot adapted to the torsion plate, and the upper end of the torsion plate is engaged in the slot.

[0013] Furthermore, the lifting device also includes an operating table for fixing the lifting device at the irradiation pipe mouth, and the operating table includes: an operating bracket, an operating support plate and a positioning column, the lower end of the operating bracket is fixedly connected to the upper side of the operating support plate, the upper end of the positioning column is fixedly connected to the lower side of the operating support plate, the external gripping head is arranged in the operating bracket, and the operating bracket provides an upward supporting force for the external gripping head handle.

[0014] Specifically, a groove is provided at the upper end of the operating bracket, the outer grip handle is placed in the groove, the groove is provided with a first placement groove and a second placement groove in the circumferential direction, and the length of the transverse groove is equal to the distance between the first placement groove and the second placement groove.

[0015] A method for using a double-layer tube type lifting device for loading and unloading an irradiation device, based on the double-layer tube type lifting device for loading and unloading an irradiation device as described above, the method for using the device comprises:

[0016] Lower the lifting device to move the claw body from the upper end of the vertical slot to the lower end of the vertical slot;

[0017] Apply torque to the outer grip handle and the inner grip handle to move the claw body from the first end of the transverse groove to the second end of the transverse groove;

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

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

[0020] The present invention arranges an inner tube and an outer tube. The inner tube is provided with an inner gripping head, an inner gripping head handle, an inner tube and a grabbing head. The inner gripping head and the grabbing head are used to realize the grabbing, installation and disassembly of the irradiation device. The outer tube includes an outer gripping head, an outer gripping head handle, an outer tube, a lower joint and a torque plate. The outer gripping head drives the inner tube to rotate and lift through the outer gripping head handle. The torque plate is used to transmit torque and axially limit the grabbing head.

[0021] The double-layer tube design of the present invention enables the inner and outer layers of the tube to work together, effectively improving the rigidity and stability of the device and reducing deformation and errors generated during the lifting process. In addition, the torsion plate can not only transmit greater torque, but also provide an axial limiting function for the inner tube and the grabbing head, preventing the grabbing head from accidentally falling, thereby enhancing the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0023] Figure 1 It is a structural schematic diagram of a double-layer tube type lifting device for loading and unloading an irradiation device according to the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the inner layer tube according to the present invention.

[0025] Figure 3 Schematic diagram of the structure of the outer tube according to the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the operating table according to the present invention.

[0027] Figure 5 Schematic diagram of the operation of the lifting device according to the present invention.

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

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

[0030] Figure 8 It is a schematic diagram of the method for using the lifting device according to the present invention.

[0031] Fig. 9 It is a schematic diagram of the use of the lifting device according to the present invention.

[0032] Figure numbers: 1-inner tube, 2-outer tube, 3-operating table, 4-lifting head, 11-inner gripping head, 12-inner gripping head handle, 13-inner pipe, 14-grabbing head, 141-rod body, 142-claw body, 21-outer gripping head, 22-outer gripping head handle, 23-outer pipe, 24-lower joint, 25-torque plate, 31-operating bracket, 32-operating support plate, 33-positioning column. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention.

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

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Embodiment 1

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

[0040] The inner tube 1 is arranged inside the outer tube 2, and the two are fixed by clamping at the upper and lower ends respectively, so as to ensure that the two tubes maintain a stable relative position during use. The grabbing head 14 at the lower end of the inner 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 connecting and separating the grabbing head 14 and the lifting head 4.

[0041] The traditional single-layer pipe structure is prone to twisting and bending deformation during the hoisting process, resulting in reduced operation accuracy. However, the double-layer pipe structure adopted in this embodiment can significantly improve the torsion and bending resistance of the inner pipe 1 through the support of the outer pipe 2.

[0042] That is, the design principle of the double-layer tube is to utilize the synergistic effect of the inner tube 1 and the outer tube 2 to improve the overall rigidity and stability of the hoisting device. The inner tube 1 is located inside the outer tube 2 and is connected by snap-fitting to form an integral structural system. The two ends of the inner tube 1 and the two ends of the outer tube 2 are snap-fitted, which can effectively enhance the rigidity of the device, reduce the deformation and error that may occur during the hoisting process, and improve the operating accuracy and safety of the device.

[0043] At the same time, the outer tube 2 can also provide additional support and protection for the inner tube 1, thereby preventing the inner tube 1 from being damaged, protecting the inner tube 1 from the influence of the external environment, and extending the service life of the device.

[0044] Embodiment 2

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

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

[0047] The inner layer tube 1 includes: an inner gripping head 11, an inner gripping head handle 12, an inner tube 13 and a grabbing head 14. The lower end of the inner gripping head 11 is connected to the upper end of the inner tube 13, the lower end of the inner tube 13 is connected to the grabbing head 14, and the inner gripping head handle 12 is connected to the outer side surface of the inner gripping head 11.

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

[0049] The grab head 14 includes: a rod body 141 and a claw body 142. The upper end of the rod body 141 is coaxially fixedly connected to the lower end of the inner tube 13. The claw body 142 is fixedly connected to the side of the rod body 141, and the central axis of the claw body 142 is perpendicular to the central axis of the rod body 141.

[0050] The lower end of the inner grip 11 is connected to the upper end of the inner pipe 13, usually by welding or other firm connection methods to ensure that it will not loosen during use. The inner grip handle 12 is connected to the outer side of the inner grip 11 and is arranged along the radius extension line of the inner grip 11, so that it is convenient for the operator to apply torque and control the rotation of the inner grip 11. The length of the inner pipe 13 is customized according to the specific situation, and can realize the loading and unloading of 5-20m deep irradiation devices.

[0051] The claw body 142 on the grabbing head 14 can cooperate with the lifting head 4 to achieve lifting. The specific structure of the lifting head 4 will be described in the following embodiments.

[0052] Embodiment 3

[0053] A double-tube lifting device for loading and unloading an irradiation device comprises: an inner tube 1 and an outer tube 2, wherein the inner tube 1 is arranged inside the outer tube 2, the upper end of the inner tube 1 is clamped with the upper end of the outer tube 2, the lower end of the inner tube 1 is clamped with the lower end of the outer tube 2, the lower end of the inner tube 1 is connected with a grabbing head 14, and the lifting head 4 is used for detachable connection with the irradiation device.

[0054] like Figure 3 , Figure 5 , Fig. 9 As shown, the outer tube 2 includes: an outer gripping head 21, an outer gripping head handle 22, an outer tube 23, a lower joint 24 and a torque plate 25. The lower end of the outer gripping head 21 is connected to the upper end of the outer tube 23, and the torque plate 25 is connected to the lower end of the outer tube 23 through the lower joint 24. The inner gripping head 11 is arranged in the outer gripping head 21, and the inner tube 13 is arranged in the inner tube 13. A through hole is arranged on the outer gripping head 21 for the inner gripping head handle 12 to pass through; a through groove is arranged on the rod body 141, and the torque plate 25 is arranged in the through groove.

[0055] The diameter of the through slot coincides with that of the rod body 141 , the torsion plate 25 passes through the through slot, the lower end of the lower joint 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.

[0056] The lower end of the outer gripping head 21 is connected to the upper end of the outer tube 23 by welding or other firm connection methods to ensure that it will not loosen during use. The outer gripping head 21 is provided with a through hole for the inner gripping head handle 12 to pass through, so as to achieve the fixation between the inner gripping head 11 and the outer gripping head 21. At the same time, the outer gripping head handle 22 is connected to the outer side of the outer gripping head 21, so that the operator can apply torque to the inner gripping head 11 through the inner gripping head handle 12, and at the same time, the outer gripping head handle 22 can also be used to apply torque to the outer gripping head 21. The outer tube 23 provides structural support and transmits torque through the lower joint 24 and the torque plate 25. It can also be customized according to the length of the inner tube 13.

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

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

[0059] The operator applies torque through the outer grip handle 22, and the outer grip 21 drives the outer tube 23 to rotate. The torque of the rotation is transmitted to the torque plate 25 through the lower joint 24, and the torque plate 25 then transmits the torque to the inner tube 1 through the through groove. At the same time, the operator also applies torque through the inner grip handle 12, and the inner grip 11 drives the inner tube 13 to rotate. The outer tube 2 and the inner tube 1 are transmitted through the upper and lower ends, which reduces the deformation of the inner tube 1 and increases the accuracy.

[0060] Finally, the torsion plate 25 is arranged in the through groove of the inner tube 1, which not only transmits torque through mechanical cooperation, but also provides an axial limiting function to prevent the inner tube 1 from accidentally falling off during operation, thereby enhancing the safety of the device.

[0061] Embodiment 4

[0062] A double-tube lifting device for loading and unloading an irradiation device comprises: an inner tube 1 and an outer tube 2, wherein the inner tube 1 is arranged inside the outer tube 2, the upper end of the inner tube 1 is clamped with the upper end of the outer tube 2, the lower end of the inner tube 1 is clamped with the lower end of the outer tube 2, the lower end of the inner tube 1 is connected with a grabbing head 14, and the lifting head 4 is used for detachable connection with the irradiation device.

[0063] The inner layer tube 1 includes: an inner gripping head 11, an inner gripping head handle 12, an inner tube 13 and a grabbing head 14. The lower end of the inner gripping head 11 is connected to the upper end of the inner tube 13, the lower end of the inner tube 13 is connected to the grabbing head 14, and the inner gripping head handle 12 is connected to the outer side surface of the inner gripping head 11.

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

[0065] The grab head 14 includes: a rod body 141 and a claw body 142. The upper end of the rod body 141 is coaxially fixedly connected to the lower end of the inner tube 13. The claw body 142 is fixedly connected to the side of the rod body 141, and the central axis of the claw body 142 is perpendicular to the central axis of the rod body 141.

[0066] like Figure 8 As shown, the lifting head 4 is a component used to connect 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 adapted to the claw body 142, and 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, and 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.

[0067] The upper end of the vertical slot is connected to the upper end face of the lifting head 4, and is used to guide the claw body 142 to enter the lifting slot from the upper end. The slot is set on the side of the lifting head 4, and the lower end of the vertical slot is connected to the first end of the horizontal slot. The claw body 142 moves down from the vertical slot to the first end of the horizontal slot, and then moves horizontally to the second end of the horizontal slot to complete the locking.

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

[0069] In addition, in order to increase the stability between the claw body 142 and the lifting slot, a short vertical slot can be provided at the second end of the transverse slot. After the claw body 142 moves to the second end of the transverse slot, it can move upward slightly, thereby locking the claw body 142.

[0070] like Figure 8 As shown, the number of claw bodies 142 is four, which is a cross head structure. In practice, it can be replaced with a gripping head 14 of different forms such as two-claw type, three-claw type, six-claw type, etc., to be suitable for more test conditions.

[0071] Embodiment 5

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

[0073] The outer tube 2 includes: an outer gripping head 21, an outer gripping head handle 22, an outer tube 23, a lower joint 24 and a torque plate 25. The lower end of the outer gripping head 21 is connected to the upper end of the outer tube 23, and the torque plate 25 is connected to the lower end of the outer tube 23 through the lower joint 24. The inner gripping head 11 is arranged in the outer gripping head 21, and the inner tube 13 is arranged in the inner tube 13. A through hole is arranged on the outer gripping head 21 for the inner gripping head handle 12 to pass through; a through groove is arranged on the rod body 141, and the torque plate 25 is arranged in the through groove.

[0074] The diameter of the through slot coincides with that of the rod body 141 , the torsion plate 25 passes through the through slot, the lower end of the lower joint 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.

[0075] like Figure 1 , Figure 4 , Figure 5 As shown, the lifting device also includes an operating table 3 for fixing the lifting device at the irradiation pipe port, 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, the upper end of the positioning column 33 is fixedly connected to the lower side of the operating support plate 32, the outer gripping head 21 is arranged in the operating bracket 31, and the operating bracket 31 provides an upward supporting force for the outer gripping head handle 22.

[0076] The operating platform 3 is an important part of the lifting device, which is mainly used to fix the lifting device and provide support and positioning functions. The operating bracket 31 is a structural component used to support the outer gripping head 21. The lower end of the operating bracket 31 is fixedly connected to the upper side of the operating support plate 32 to ensure the stability of the operating bracket 31 during use.

[0077] The operating support plate 32 is the basic structure of the operating platform 3, which is used to support and connect the operating bracket 31 and the positioning column 33. The positioning column 33 ensures the precise positioning and fixation of the operating platform 3 at the irradiation pipe opening to prevent the operating platform 3 from being displaced 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 other shapes, which can be applicable to more test occasions. The positioning column 33 is adapted to the connection flange of the irradiation channel port to fix the entire operating table 3. The positioning column 33 or the pin can also be replaced to use a cylindrical positioning column 33 to achieve positioning and support of the operating table 3.

[0079] In order to limit the rotation angle, a groove is set at the upper end of the operating bracket 31, and the outer grip 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, and the length of the transverse 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 grip 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 grip handle 22 is located above the second placement groove. The outer grip handle 22 is placed in the groove, and the first placement groove and the second placement groove cooperate to ensure that the outer grip handle 22 does not move during operation, thereby improving the accuracy and safety of the operation.

[0081] The operating table 3 not only provides the functions of fixing and supporting, but also ensures the positioning and stability of the outer gripper handle 22 through the structural design of the groove and placement slot. This multi-level fixing and supporting design makes the hoisting device safer and more efficient during the loading and unloading process of the irradiation device.

[0082] Embodiment 6

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

[0084] The inner layer tube 1 includes: an inner gripping head 11, an inner gripping head handle 12, an inner tube 13 and a grabbing head 14. The lower end of the inner gripping head 11 is connected to the upper end of the inner tube 13, the lower end of the inner tube 13 is connected to the grabbing head 14, and the inner gripping head handle 12 is connected to the outer side surface of the inner gripping head 11.

[0085] The grab head 14 includes: a rod body 141 and a claw body 142. The upper end of the rod body 141 is coaxially fixedly connected to the lower end of the inner tube 13. The claw body 142 is fixedly connected to the side of the rod body 141, and the central axis of the claw body 142 is perpendicular to the central axis of the rod body 141.

[0086] The outer tube 2 includes: an outer gripping head 21, an outer gripping head handle 22, an outer tube 23, a lower joint 24 and a torque plate 25. The lower end of the outer gripping head 21 is connected to the upper end of the outer tube 23, and the torque plate 25 is connected to the lower end of the outer tube 23 through the lower joint 24. The inner gripping head 11 is arranged in the outer gripping head 21, and the inner tube 13 is arranged in the inner tube 13. A through hole is arranged on the outer gripping head 21 for the inner gripping head handle 12 to pass through; a through groove is arranged on the rod body 141, and the torque plate 25 is arranged in the through groove.

[0087] The lifting head 4 is a component used to connect 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 adapted to the claw body 142, and 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, and the horizontal groove is arranged 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.

[0088] The upper end of the vertical slot is connected to the upper end face of the lifting head 4, and is used to guide the claw body 142 to enter the lifting slot from the upper end. The slot is set on the side of the lifting head 4, and the lower end of the vertical slot is connected to the first end of the horizontal slot. The claw body 142 moves down from the vertical slot to the first end of the horizontal slot, and then moves horizontally to the second end of the horizontal slot to complete the locking.

[0089] A method for using a double-layer tube type lifting device for loading and unloading an irradiation device, which is based on the above double-layer tube type lifting device for loading and unloading an irradiation device, and the method for using includes:

[0090] The lifting device is lowered to move the claw body 142 from the upper end of the vertical slot to the lower end of the vertical slot; the vertical slot is designed to guide the vertical movement of the claw body 142. Through this process, the claw body 142 can accurately enter the predetermined position of the lifting head 4.

[0091] Applying torque to the outer grip handle 22 and the inner grip handle 12 causes the claw body 142 to move from the first end of the transverse groove to the second end of the transverse groove; the transverse groove is provided on the side of the lifting head 4 and connects 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 transverse groove, ensuring that the claw body 142 is firmly locked in the lifting head 4, thereby ensuring the stability of the grasping.

[0092] After the claw body 142 is locked, the claw body 142 of the inner tube 1 has firmly grasped the lifting head 4, and the lifting device is raised. At this time, the claw body 142 can be stuck in the short vertical groove, and the lifting head 4 is moved upward through the claw body 142 to complete the lifting of the irradiation device.

[0093] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0094] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0095] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A double-layer tube type lifting device for loading and unloading an irradiation device, characterized in that: include: An inner tube (1) and an outer tube (2), wherein the inner tube (1) is arranged inside the outer tube (2), the upper end of the inner tube (1) is clamped with the upper end of the outer tube (2), the lower end of the inner tube (1) is clamped with the lower end of the outer tube (2), the lower end of the inner tube (1) is connected to a grabbing head (14), and the lifting head (4) is used for detachable connection with an irradiation device.

2. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 1, characterized in that: The inner layer tube (1) comprises: an inner gripping head (11), an inner gripping head handle (12), an inner tube (13) and the grabbing head (14); the lower end of the inner gripping head (11) is connected to the upper end of the inner tube (13); the lower end of the inner tube (13) is connected to the grabbing head (14); and the inner gripping head handle (12) is connected to the outer side surface of the inner gripping head (11).

3. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 2, characterized in that: The inner gripping head (11), the inner pipe (13) and the grabbing head (14) are coaxially arranged, and the inner gripping head handle (12) is arranged along the extension line of the radius of the inner gripping head (11).

4. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 2, characterized in that: The grabbing head (14) comprises a rod body (141) and a claw body (142), wherein the upper end of the rod body (141) is coaxially fixedly connected to the lower end of the inner pipe (13), the claw body (142) is fixedly connected to the side of the rod body (141), and the central axis of the claw body (142) is arranged perpendicular to the central axis of the rod body (141).

5. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 4, characterized in that: The outer layer tube (2) comprises: an outer gripping head (21), an outer gripping head handle (22), an outer tube (23), a lower joint (24) and a torque plate (25); the lower end of the outer gripping head (21) is connected to the upper end of the outer tube (23); the torque plate (25) is connected to the lower end of the outer tube (23) via the lower joint (24); the inner gripping head (11) is arranged inside the outer gripping head (21); the inner tube (13) is arranged inside the inner tube (13); and a through hole is arranged on the outer gripping head (21) for the inner gripping head handle (12) to pass through. The rod body (141) is provided with a through slot, and the torsion plate (25) is arranged in the through slot.

6. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 5, 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 comprising: a vertical groove and a horizontal groove, the upper end of the vertical groove is connected to the upper end surface 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.

7. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 6, characterized in that: 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 joint (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.

8. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 6, characterized in that: It also includes an operating table (3) for fixing the hoisting device at the irradiation pipe opening, the operating table (3) including: 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), the upper end of the positioning column (33) is fixedly connected to the lower side of the operating support plate (32), the outer gripping head (21) is arranged in the operating bracket (31), and the operating bracket (31) provides an upward supporting force for the outer gripping head handle (22).

9. A double-layer tube type lifting device for loading and unloading an irradiation device according to claim 8, characterized in that: The upper end of the operating bracket (31) is provided with a groove, 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, and the length of the transverse groove is equal to the distance between the first placement groove and the second placement groove.

10. A method for using a double-layer tube type lifting device for loading and unloading an irradiation device, characterized in that: Based on a double-layer tubular lifting device for loading and unloading an irradiation device as described in any one of claims 6 to 9, the method of use includes: Lowering the lifting device to move the claw body (142) from the upper end of the vertical slot to the lower end of the vertical slot; Applying torque to the outer grip handle (22) and the inner grip 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 is raised to move the lifting head (4) upwards through the claw body (142).

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