Lifting tool for maintaining lifting cylinder of spent fuel charging device of high-temperature gas cooled reactor

Abstract

The invention discloses a lifting tool for maintenance of a lifting air cylinder of a high-temperature gas cooled reactor spent fuel charging device, and relates to the technical field of maintenance of the high-temperature gas cooled reactor spent fuel charging device. The air cylinder piston rod is located at the upper end of the lifting air cylinder. Wherein the lifting ring assembly is connected to the upper end of the outer cylinder through threads, the lifting handle is used for being connected with the core rod body, the core rod body and the clamping jaw sliding block are connected into a whole through the core rod lower connector and the core rod connecting nut, and the clamping jaw base is connected with the outer cylinder through a stainless steel screw. And the guide wheel and the clamping jaw body are both mounted on the outer barrel. The invention provides an effective solution to deal with the maintenance problem of the lifting cylinder in the spent fuel charging device; a matching mechanism of the clamping jaw and the clamping jaw opening sliding block is specially designed, and accurate grabbing of the piston rod of the air cylinder is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of maintenance of a spent fuel charging device of a high temperature gas-cooled reactor, in particular to a lifting tool for maintenance of a lifting cylinder of a spent fuel charging device of a high temperature gas-cooled reactor. Background Art

[0002] Most of the equipment in the high-temperature gas-cooled reactor spent fuel storage system is used for the first time in domestic nuclear power plants. The equipment related to the spent fuel storage system is in a strong radioactive environment and there is no mature maintenance experience to learn from. Therefore, it is extremely important to design and manufacture supporting special maintenance tools to improve maintenance skills and fault diagnosis capabilities. This is of great significance to ensure the safe and stable operation of the system, reduce the probability of unplanned shutdown of the unit and improve the economic efficiency of the power plant.

[0003] The claw opening and closing device in the lifting cylinder of the spent fuel loading device moves up and down along the cylinder body to complete the placement operation of the spent fuel tank cover. When the lifting cylinder or the claw opening and closing device fails, the predetermined tank cover placement operation is blocked, and the storage tank filled with spent fuel balls makes the entire environment highly radioactive, and personnel cannot enter the environment for maintenance operations.

[0004] In the case of a failure of the lifting cylinder or the claw opening and closing device, the lifting cylinder needs to be dismantled online. The prior art does not have special tools for rapid maintenance, and maintenance personnel need to bear a large radiation dose. Summary of the invention

[0005] In view of the problem that the above-mentioned existing technologies have no special tools for rapid maintenance and the maintenance personnel need to bear a large radioactive dose, a lifting tool for repairing the lifting cylinder of a high-temperature gas-cooled reactor spent fuel loading device is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising: the main body component comprises a lifting cylinder and a cylinder piston rod;

[0007] Wherein, the cylinder piston rod is located at the upper end of the lifting cylinder;

[0008] The lifting component includes a lifting ring assembly, an outer cylinder, a core rod body, a lifting handle, a core rod lower joint, a core rod connecting nut, a clamping jaw opening slide block, a clamping jaw base, a clamping jaw body and a guide wheel;

[0009] Among them, the lifting ring assembly is connected to the upper end of the outer cylinder through a thread, the lifting handle is used to connect the core rod body, the core rod lower joint and the core rod connecting nut connect the core rod body and the clamping slider to form a whole, the clamping jaw base and the outer cylinder are connected by stainless steel screws, and the guide wheel and the clamping jaw body are both installed on the outer cylinder.

[0010] As a preferred solution of the lifting tool for repairing the lifting cylinder of a high-temperature gas-cooled reactor spent fuel loading device described in the present invention, the lifting ring assembly is in a U-shaped structure and is installed at the uppermost end of the entire lifting device through threads.

[0011] As a preferred solution of the lifting tool for repairing the lifting cylinder of the high-temperature gas-cooled reactor spent fuel loading device described in the present invention, the outer cylinder is provided with equidistant annular holes on the cylinder wall, the lifting handle is adapted to the annular holes, the upper end of the outer cylinder is provided with an internal thread, and the lower end of the outer cylinder is connected to the clamping claw base by a flange.

[0012] As a preferred solution of the lifting tool for repairing the lifting cylinder of the high-temperature gas-cooled reactor spent fuel loading device described in the present invention, the core rod body is a cylindrical structure, the core rod body is located in the internal cavity of the outer cylinder, and the core rod body has three sections.

[0013] As a preferred solution of the lifting tool for repairing the lifting cylinder of the high-temperature gas-cooled reactor spent fuel loading device of the present invention, the lifting handle includes a handle outer cylinder, a handle core rod, a handle bracket, a spring and a nut;

[0014] The two ends of the handle bracket extend into the inner cavities of the two core rod bodies, the handle core rod passes through the handle bracket, and a spring is used to support the handle outer tube and the handle bracket.

[0015] As a preferred solution of the lifting tool for repairing the lifting cylinder of the spent fuel loading device of a high-temperature gas-cooled reactor described in the present invention, the uppermost end of the clamping jaw opening slider is a cylindrical structure, and an external thread is arranged inside the cylindrical structure; the lower end of the clamping jaw opening slider is a frustum structure, the inclined surface of the frustum cooperates with the clamping jaw body, and a nylon pad is arranged on the bottom surface of the frustum.

[0016] As a preferred solution of the lifting tool for repairing the lifting cylinder of the spent fuel loading device of a high-temperature gas-cooled reactor described in the present invention, the clamp base is a hollow cylindrical structure, the clamp opening slider and the core rod body are located in the cavity of the clamp base, and the upper part of the clamp base is connected to the bottom of the outer cylinder.

[0017] As a preferred solution of the lifting tool for repairing the lifting cylinder of the high-temperature gas-cooled reactor spent fuel loading device described in the present invention, there are two clamping jaw bodies, which are symmetrically arranged, and a truncated cone structure is arranged on the upper end of the cylinder piston rod.

[0018] As a preferred solution of the lifting tool for repairing the lifting cylinder of the spent fuel loading device of a high-temperature gas-cooled reactor described in the present invention, the guide wheel is installed on the clamp base through a pin shaft, and a copper sleeve is sleeved on the pin shaft; and the guide wheel is arranged longitudinally and is balanced with the busbar of the clamp base.

[0019] As a preferred solution of the lifting tool for repairing the lifting cylinder of the high-temperature gas-cooled reactor spent fuel loading device described in the present invention, there are six guide wheels in total, three of which form a group, and the maximum circumferential diameter of the guide wheels is 158 mm, which is smaller than the inner diameter of the lifting cylinder of 160 mm.

[0020] The beneficial effects of the present invention are as follows: the present invention provides an effective solution to the maintenance problem of the lifting cylinder in the spent fuel loading device; it specially designs the matching mechanism of the clamp and the clamp opening slider to achieve accurate grasping of the cylinder piston rod, while ensuring that all component sizes are adapted and will not interfere with the inner wall of the cylinder. The innovation of this tool lies in its compact design, which can not only operate in a small space, but also ensure efficient and safe maintenance of equipment in a radioactive environment. In addition, the overall structure of the tool is stable and reliable, and the various components are smoothly slidably connected to prevent loosening during operation, improve maintenance efficiency, and reduce the risk of radiation exposure of maintenance personnel, thereby ensuring the stable operation of the system and improving the safety and economic benefits of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the lifting tool in the present invention.

[0023] Figure 2 It is a schematic diagram of the use of the lifting tool in the present invention.

[0024] Figure 3 It is a partial schematic diagram of the lifting handle in the present invention.

[0025] Figure 4 This is a schematic diagram of the lifting handle opening in the present invention.

[0026] Figure 5 This is a schematic diagram of the lifting handle closing in the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide wheel in the present invention.

[0028] Figure 7 It is a bottom view of the guide wheel in the present invention.

[0029] Figure 8 It is an enlarged schematic diagram of the connection between the core rod body and the clamp opening slider of the present invention.

[0030] Fig. 9 This is a schematic diagram of the clamp body of the present invention being opened.

[0031] Fig.10 It is a schematic diagram of the gripping of the clamp body in the present invention.

[0032] : 100, main body; 101, lifting cylinder; 102, cylinder piston rod; 200, lifting component; 201, lifting ring assembly; 202, outer tube body; 203, core rod body; 204, lifting handle; 205, core rod lower joint; 206, core rod connecting nut; 207, clamping jaw opening slider; 208, clamping jaw base; 209, clamping jaw body; 210, guide wheel; 204a, handle outer tube; 204b, handle core rod; 204c, handle bracket; 204d, spring; 204e, nut one. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0037] Example 1, reference Figure 1 to Figure 4, which is the first embodiment of the present invention, and provides a lifting tool for repairing the lifting cylinder 101 of the spent fuel charging device of a high-temperature gas-cooled reactor, including: a main body component 100 includes a lifting cylinder 101 and a cylinder piston rod 102; wherein the cylinder piston rod 102 is located at the upper end of the lifting cylinder 101; a lifting component 200 includes a lifting ring assembly 201, an outer cylinder body 202, a core rod body 203, a lifting handle 204, a core rod lower joint 205, a core rod connecting nut 206, a clamping jaw opening slider 207, a clamping jaw base 208, and a clamping jaw body 209. and a guide wheel 210; wherein, the lifting ring assembly 201 is connected to the upper end of the outer cylinder body 202 through a thread, the lifting handle 204 is used to connect the core rod body 203, the core rod lower joint 205 and the core rod connecting nut 206 connect the core rod body 203 and the clamping jaw opening slider 207 to form a whole, the clamping jaw base 208 and the outer cylinder body 202 are connected by stainless steel screws, the guide wheel 210 and the clamping jaw body 209 are both installed on the outer cylinder body 202, and the main material thereof is 304L stainless steel, which is suitable for the corrosion resistance requirements in the high temperature gas-cooled reactor environment.

[0038] The lifting cylinder 101 is responsible for the up and down movement of the cylinder piston rod 102 . The cylinder piston rod 102 is located at the upper end of the lifting cylinder 101 and is the part that connects the opening and closing device of the clamp body 209 .

[0039] The lifting ring assembly 201 is in a U-shaped structure, and the lifting ring assembly 201 is installed at the uppermost end of the entire lifting device through threads; the lifting ring assembly 201 is installed at the uppermost end of the lifting tool through threads, so as to facilitate the overall lifting by a crane.

[0040] The outer cylinder body 202 is provided with equidistant annular holes on its wall, the lifting handle 204 is matched with the annular holes, the upper end of the outer cylinder body 202 is provided with an internal thread, and the lower end of the outer cylinder body 202 is connected to the clamping claw base 208 by a flange; the outer cylinder body 202 has only one section, and there are equidistant annular holes on its wall to facilitate the sliding or retraction of the lifting handle 204, the upper end has a special internal thread for installing the lifting ring assembly 201, and the lower end is a flange end face, which is connected to the clamping claw base 208 by a non-slip screw.

[0041] The core rod body 203 is a cylindrical structure, and the core rod body 203 is located in the internal cavity of the outer cylinder body 202. The core rod body 203 has three sections; the core rod body 203 is a three-section cylindrical structure, which is placed in the internal cavity of the outer cylinder body 202. Each section of the core rod body 203 is connected to the lifting handle 204 through a pin, and the lower end of the lower section of the long rod is connected to the core rod lower joint 205 through a pin.

[0042] The lifting handle 204 includes a handle outer tube 204a, a handle core rod 204b, a handle bracket 204c, a spring 204d and a nut 204e; both ends of the handle bracket 204c extend into the inner cavity of the two core rod bodies 203, the handle core rod 204b passes through the handle bracket 204c, and a spring 204d is used to support the handle outer tube 204a and the handle bracket 204c; wherein both ends of the handle bracket 204c extend into the inner cavity of the core rod body 203, and are connected by a pin shaft, the handle core rod 204b passes through the handle bracket 204c, and has threads at both ends and is supported by the spring 204d between the handle bracket 204c, and the handle outer tube 204a is installed on the core rod thread through a nut, and the special shape can be locked or slid in the annular hole of the outer tube body 202.

[0043] Operation process: When it is necessary to carry out a lifting task, install the lifting ring assembly 201 on the uppermost end of the outer cylinder body 202 through threads, connect the flange at the lower end of the outer cylinder body 202 with the clamping claw base 208, and fix it with a screw that does not come out. In turn, assemble three sections of the core rod body 203 inside the outer cylinder body 202, and each section of the core rod body 203 is connected to the lifting handle 204 through a pin shaft. Install the core rod lower joint 205 to the lowermost end of the core rod body 203 and fix it with the core rod connecting nut 206. Combine the handle outer cylinder 204a, handle core rod 204b, handle bracket 204c, spring 204d and nut 204e of the lifting handle 204 together, ensure that the two ends of the handle bracket 204c are connected to the core rod body 203 through the pin shaft, and the handle core rod 204b is inserted through the Through the handle bracket 204c, the spring 204d supports the gap between the handle outer tube 204a and the handle bracket 204c, and uses a crane to lift the entire lifting tool through the lifting ring assembly 201 and position it above the lifting cylinder 101 that needs maintenance, and slowly lower the lifting tool until the clamping claw body 209 contacts the truncated cone structure on the cylinder piston rod 102. After lifting the cylinder piston rod 102 to an appropriate height, start the maintenance work on the lifting cylinder 101. After the maintenance is completed, operate the lifting handle 204 in reverse, release the clamping claw body 209, and put the cylinder piston rod 102 back to its original position. Then use the crane to move the lifting tool away from above the lifting cylinder 101, complete a maintenance operation, perform necessary inspection and maintenance on the lifting tool, and prepare for the next use.

[0044] Example 2, reference Figures 5 to 10 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, and the difference is that the uppermost end of the clamping jaw opening slider 207 is a cylindrical structure, and an external thread is arranged inside the cylindrical structure. The lower end of the clamping jaw opening slider 207 is a truncated cone structure, and the inclined surface of the truncated cone cooperates with the clamping jaw body 209, and nylon is arranged on the bottom surface of the truncated cone.

[0045] The uppermost end of the jaw opening slider 207 is a cylindrical structure with an external thread inside for threaded connection with the core rod connecting nut 206, and the lower end is a truncated cone structure. The inclined surface design of the truncated cone cooperates with the jaw body 209, and a nylon pad is provided on the bottom. When the slider moves axially, its truncated cone structure will force the jaw body 209 to open or close, thereby grasping or releasing the cylinder piston rod 102. Considering the corrosive media that may exist in the working environment, the jaw slider is usually made of corrosion-resistant materials, such as 304 or 316L stainless steel, and the nylon pad on the bottom of the truncated cone can be made of engineering plastics with good wear-resistant and shock-absorbing properties, such as nylon 66 or polyoxymethylene (POM).

[0046] The clamping jaw base 208 is a hollow cylindrical structure. The clamping jaw opening slider 207 and the core rod body 203 are located in the cavity of the clamping jaw base 208 . The upper part of the clamping jaw base 208 is connected to the bottom of the outer cylinder body 202 .

[0047] The jaw base 208 is a hollow cylindrical structure, and the internal space is used to accommodate the jaw opening slider 207 and the core rod body 203. The upper part is connected to the bottom of the outer cylinder body 202 by screws and other fixings. The jaw base 208 serves as a core supporting component to carry the guide wheel 210 and the jaw body 209, ensuring the relative position relationship of each component and transmitting the force to the outer cylinder body 202. For corrosion resistance and strength considerations, the jaw base 208 is often made of high-strength, corrosion-resistant metal materials, such as 304L stainless steel, to ensure long-term stable working performance.

[0048] There are two clamping jaw bodies 209 symmetrically arranged, and a truncated cone structure is arranged at the upper end of the cylinder piston rod 102 .

[0049] The jaw body 209 is composed of two symmetrically arranged parts, which match the truncated cone structure on the cylinder piston rod 102 and are designed to be able to move radially to achieve opening and closing movements. By cooperating with the truncated cone structure of the cylinder piston rod 102, the piston rod can be gripped and released to facilitate maintenance or replacement of the piston rod. In order to ensure sufficient strength and wear resistance, the jaw body 209 is often made of high-strength alloy steel and subjected to surface hardening treatment, such as carburizing and quenching, to improve wear resistance and impact resistance.

[0050] The rest of the structure is the same as that of Example 1.

[0051] Operation process: When using the device for gripping work, the operator uses the jaws to open the jaw slide by lifting the handle 204 and move the jaw slide downward. The inclined surface of the frustum structure forces the jaw body 209 to unfold until the jaw body 209 contacts the frustum-shaped structure on the cylinder piston rod 102. Continue to press the jaw slide downward so that the jaw body 209 completely embraces the cylinder piston rod 102, rotate the lifting handle 204, and use the external thread on the jaw slide to cooperate with the core rod connecting nut 206 to lock the position of the jaw slide to ensure that the jaw body 209 firmly grasps the cylinder piston rod 102.

[0052] Example 3, reference Figure 6 and Figure 7 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the guide wheel 210 is installed on the clamping jaw base 208 through a pin shaft, and a copper sleeve is sleeved on the pin shaft; and the guide wheel 210 is arranged longitudinally and is balanced with the busbar of the clamping jaw base 208.

[0053] There are six guide wheels 210 , three of which form a group, and the maximum circumferential diameter of the guide wheels 210 is 158 mm, which is smaller than the inner diameter of the lifting cylinder 101 , which is 160 mm.

[0054] Among them, the guide wheel 210 is installed on the clamp base 208 through a pin shaft, and a copper sleeve is provided on the pin shaft. The guide wheel 210 is arranged longitudinally and is consistent with the generatrix direction of the clamp base 208, that is, it is parallel to the central axial line of the clamp base 208. This arrangement helps to reduce the vertical resistance of the guide wheel 210 and ensure the linear movement of the lifting tool in the lifting cylinder 101.

[0055] The rest of the structure is the same as that of Example 2.

[0056] Operation process: The main function of the guide wheel 210 is to guide the vertical movement of the lifting tool in the lifting cylinder 101 to prevent the tool from lateral displacement or jamming during movement. Since the maximum circumferential diameter of the guide wheel 210 is 158mm, which is smaller than the inner diameter of the lifting cylinder 101 of 160mm, it will not interfere with the inner wall of the lifting cylinder 101 during the tool placement and lifting operation, ensuring that the tool can move up and down smoothly. The cross-section of the guide wheel 210 is circular with a diameter of 158mm, and there are six of them, divided into two groups, three in each group. Such a number and layout design can evenly distribute the contact pressure and ensure the stability of the tool in the lifting cylinder 101. Each guide wheel 210 is arranged longitudinally, which means that they are arranged along the height direction of the lifting cylinder 101.

[0057] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0058] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device, characterized in that: The main body component (100) includes a lifting cylinder (101) and a cylinder piston rod (102); Wherein, the cylinder piston rod (102) is located at the upper end of the lifting cylinder (101); The lifting component (200) comprises a lifting ring assembly (201), an outer cylinder body (202), a core rod body (203), a lifting handle (204), a core rod lower joint (205), a core rod connecting nut (206), a clamping jaw opening slider (207), a clamping jaw base (208), a clamping jaw body (209) and a guide wheel (210); The lifting ring assembly (201) is connected to the upper end of the outer cylinder body (202) by threads, the lifting handle (204) is used to connect the core rod body (203), the core rod lower joint (205) and the core rod connecting nut (206) connect the core rod body (203) and the clamping claw sliding block to form a whole, the clamping claw base (208) and the outer cylinder body (202) are connected by stainless steel screws, and the guide wheel (210) and the clamping claw body (209) are both installed on the outer cylinder body (202).

2. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 1, characterized in that: The lifting ring assembly (201) is in a U-shaped structure and is installed at the uppermost end of the entire lifting device via threads.

3. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 1, characterized in that: The outer cylinder body (202) is provided with equidistant annular holes on its wall, the lifting handle (204) is matched with the annular holes, the upper end of the outer cylinder body (202) is provided with an internal thread, and the lower end of the outer cylinder body (202) is connected to the clamping claw base (208) by a flange.

4. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 1 or 2, characterized in that: The core rod body (203) is a cylindrical structure. The core rod body (203) is located in the inner cavity of the outer cylinder body (202). The core rod body (203) has three sections.

5. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 4, characterized in that: The lifting handle (204) comprises a handle outer tube (204a), a handle core rod (204b), a handle bracket (204c), a spring (204d) and a nut (204e); Both ends of the handle bracket (204c) extend into the inner cavities of the two core rod bodies (203), the handle core rod (204b) passes through the handle bracket (204c), and a spring (204d) is used to support the handle outer tube (204a) and the handle bracket (204c).

6. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 5, characterized in that: The uppermost end of the clamping jaw opening slider (207) is a cylindrical structure, and an external thread is arranged inside the cylindrical structure. The lower end of the clamping jaw opening slider (207) is a truncated cone structure, and the inclined surface of the truncated cone cooperates with the clamping jaw body (209), and a nylon pad is arranged on the bottom surface of the truncated cone.

7. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 1, characterized in that: The clamping jaw base (208) is a hollow cylindrical structure, the clamping jaw opening slider (207) and the core rod body (203) are located in the cavity of the clamping jaw base (208), and the upper part of the clamping jaw base (208) is connected to the bottom of the outer cylinder body (202).

8. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 1 or 7, characterized in that: There are two clamping jaw bodies (209) in total, which are symmetrically arranged. The upper end of the cylinder piston rod (102) is provided with a truncated cone structure.

9. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 8, characterized in that: The guide wheel (210) is installed on the clamping jaw base (208) through a pin shaft, and a copper sleeve is sleeved on the pin shaft; and the guide wheel (210) is arranged longitudinally and is balanced with the busbar of the clamping jaw base (208).

10. A lifting tool for repairing a lifting cylinder (101) of a high temperature gas-cooled reactor spent fuel loading device according to claim 9, characterized in that: There are six guide wheels (210) in total, three of which form a group, and the maximum circumferential diameter of the guide wheels (210) is 158 mm, which is smaller than the inner diameter of the lifting cylinder (101) of 160 mm.

Images