Heavy water reactor push rod maintenance bench

Abstract

The present application belongs to the technical field of heavy water reactor push rod maintenance, and aims to solve the problems of low maintenance efficiency, low integration, and low maintenance quality of existing maintenance benches. A heavy water reactor push rod maintenance bench is disclosed, including a maintenance platform, a slide rail, a support frame, and a support end head assembly. The support end head assembly has an upper end adapter clamp, a plate set, a turntable fine-tuning bracket, and a guide rail assembly, which can achieve multi-angle adjustment. The heavy water reactor push rod maintenance bench of the present application is suitable for the maintenance of the push rod assembly of the heavy water reactor assembly and unloading machine. The functional areas of the heavy water reactor push rod maintenance bench are newly arranged, with more comprehensive functions, improved operational convenience, improved maintenance efficiency and maintenance quality of the maintenance bench, and improved integration.

Description

Technical Field

[0001] The present application belongs to the technical field of heavy water reactor push rod maintenance, and in particular relates to a heavy water reactor push rod maintenance bench. Background Art

[0002] When the heavy water reactor is in operation, two loading and unloading machines are connected to both ends of the fuel channel to cooperate with each other to complete the continuous stacking and refueling. The push rod components of the loading and unloading machines are important components for completing the loading and unloading. After completing a cycle of refueling, the push rods need to be dismantled and repaired. Due to the long size, large volume, heavy weight and many parts of the push rods, their maintenance needs to be carried out on a special maintenance stand.

[0003] The maintenance bench currently used is provided by foreign manufacturers. It has a simple structure and only includes simple metal parts such as maintenance plane, slide rails, and support frames. The relevant disassembly and assembly work is completed by manpower during use. The maintenance bench can only meet the basic maintenance function and cannot provide integrated and simplified auxiliary functions for the staff. When the technicians use the maintenance bench to work, they encounter problems such as low maintenance efficiency, low maintenance quality, and high maintenance intensity. It cannot meet the requirements of simple operation, reasonable space layout, and complete functions. Summary of the invention

[0004] The purpose of the present application is to provide a heavy water reactor push rod maintenance bench to solve the problems of low maintenance efficiency, low integration and low maintenance quality of the existing maintenance benches.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A heavy water reactor push rod maintenance bench comprises a maintenance platform, a slide rail is provided on the maintenance platform, a slidable support frame is provided on the slide rail, and a support end head assembly is provided on one side of the maintenance platform for multi-angle adjustment; the support end head assembly comprises an upper end adapter fixture, a plate set, a turntable fine-tuning bracket and a guide rail assembly; the plate set has a flap, a front slide plate, a rear slide plate, a bottom plate and a flat rotating disk, and the flat rotating disk is clamped on the flap through the turntable fine-tuning bracket; the guide rail assembly comprises a horizontal guide rail and a vertical guide rail, a horizontal slide block is provided on the horizontal guide rail, and a vertical slide block is provided on the vertical guide rail; the vertical guide rail is installed on the bottom plate, the vertical slide block is connected to the back side of the rear slide plate, the horizontal guide rail is installed on the front side of the rear slide plate, and the horizontal slide block is connected to the front slide plate.

[0007] In some embodiments, the rear slide plate has a rear slide plate groove, the transverse guide rail is installed in the rear slide plate groove, the bottom plate has a bottom plate groove, and the vertical guide rail is installed in the bottom plate groove.

[0008] In some embodiments, the support end head assembly also includes a box assembly, which has a box, a large round handwheel and a spiral screw lifting shaft. The large round handwheel is arranged horizontally through the box, and the spiral screw lifting shaft is arranged vertically through the box.

[0009] In some embodiments, the supporting end head assembly also includes a slider assembly, the slider assembly having a lower small slider, a medium and small slider and a fine-tuning slider, the lower small slider is installed on the rear skateboard, the medium and small sliders are installed on the lower small slider, and the fine-tuning slider is installed on the groove of the front skateboard, and the connecting screw assembly includes a small round handwheel, a screw right support, a screw left support and a small handwheel screw, and the small handwheel screw passes through the screw left support and the screw right support and is connected to the small round handwheel.

[0010] In some embodiments, the support frame includes a skateboard base, which has an upper skateboard, a lower support plate, a V-shaped roller and a hand-tightened screw rod. The upper skateboard is installed on the lower support plate. The lower front end and the lower rear end of the lower support plate are both provided with lower support plate grooves, the V-shaped roller is installed in the lower support plate groove, and the hand-tightened screw rod is installed on the outside of the lower support plate groove.

[0011] In some embodiments, a threaded lifting shaft is installed on the skateboard base, a fixing nut is screwed on the threaded lifting shaft, and a V-shaped clamping block is movably installed on the threaded lifting shaft.

[0012] In some embodiments, a long thread lifting shaft is installed on the skateboard base, a fixing nut is screwed on the long thread lifting shaft, and a screw rod block is movably installed on the long thread lifting shaft.

[0013] In some embodiments, the maintenance platform is disposed on a main storage cabinet, and the main storage cabinet includes a double-opening cabinet door and a drawer, and the drawer is provided with a drawer lock.

[0014] In some embodiments, a screw hanger and an accordion protective cover are provided on the back of the main storage cabinet, and the accordion protective cover is fixed by a guide rail shaft.

[0015] Compared with the prior art, the heavy water reactor push rod maintenance stand provided by the present application has the following beneficial effects:

[0016] This application designs a support end head assembly to achieve multi-angle adjustment, and combines the support end head assembly with maintenance platforms, slide rails, support frames and other structures to improve the maintenance efficiency and quality of the maintenance bench and enhance the degree of integration.

[0017] The heavy water reactor push rod maintenance bench proposed in this application is suitable for the maintenance work of the push rod assembly of the heavy water reactor assembly and unloading machine. A new layout of the functional areas of the heavy water reactor special push rod maintenance bench has been made, with more comprehensive functions and improved operational convenience.

[0018] This application can simultaneously realize functions such as vertical height adjustment of the screw rod and the pipe, storage of parts, multi-angle adjustment of the support end, and dust prevention of the screw rod.

[0019] Furthermore, the support end head assembly designed in the present application has a guide rail assembly therein, and while fixing, the guide rail assembly can be adjusted to easily adjust the fixing tightness and the total height of the support end head assembly by rotating the large and small circular hand wheels, and the tape measure mechanism can be conveniently rotated.

[0020] Furthermore, the push rod support frame and the screw rod support frame designed in the present application can achieve height adjustment and are easy to operate.

[0021] Furthermore, the present application combines the slide rail, the support frame, and the support end head assembly so that the support frame can be fixed in position by adjusting the screw by hand and can be disassembled. The threaded lifting shaft of the support frame can adjust the vertical position of the push rod and the screw rod for calibration and alignment, which is intuitive and convenient.

[0022] Furthermore, the accordion protective cover behind the main storage cabinet can be easily folded and can be stored in the middle of the cabinet when not in use. When there is no need to inspect the push rod parts, hang the lead screw to be inspected on the lead screw hanger, pull open the accordion cover, and cover the lead screw inside the accordion cover to prevent dust from falling on the surface of the lead screw to be inspected and increasing the workload of subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for the technical description.

[0024] Figure 1 A left side view of the heavy water reactor push rod maintenance stand provided for this application;

[0025] Figure 2 An axonometric view of the overall structure of the heavy water reactor push rod maintenance stand provided for this application;

[0026] Figure 3 A rear view of the heavy water reactor push rod maintenance stand provided for this application;

[0027] Figure 4 A schematic diagram of the structure of the push rod support frame provided for this application;

[0028] Figure 5 A schematic diagram of the structure of the screw support frame provided in this application;

[0029] Figure 6 A schematic diagram of the structure of the skateboard base provided for this application;

[0030] Figure 7 A schematic diagram of the structure of the support end assembly provided for this application;

[0031] Figure 8 A schematic diagram of the structure of the panel set provided for this application;

[0032] Fig. 9 A schematic diagram of the structure of the guide rail assembly provided for this application;

[0033] Fig.10 A schematic diagram of the structure of the box assembly provided for this application;

[0034] Fig.11 A schematic diagram of the structure of the slider assembly provided for this application;

[0035] Fig.12 A disassembled schematic diagram of the location of the connecting screw assembly provided for this application.

[0036] Description of reference numerals:

[0037] 1. Main storage cabinet; 2. Maintenance platform; 3. Slide rail; 4. Support frame; 5. Support end assembly; 6. Screw hanger; 7. Organ protective cover; 8. Guide rail shaft;

[0038] 11. Double-opening cabinet door; 12. Drawer; 13. Drawer lock; 14. Fixed plate; 15. Fuma caster; 16. Connecting plate;

[0039] 41. V-shaped clamp block; 42. Screw clamp block; 43. Fixing nut; 44. Threaded lifting shaft; 45. Long threaded lifting shaft; 46. Slide plate base;

[0040] 461, upper slide plate; 462, lower support plate; 463, V-shaped roller; 464, nut; 465, hand screw rod; 466, pin shaft;

[0041] 4621, lower support plate slot;

[0042] 51. Upper end transfer fixture; 52. Plate set; 53. Turntable fine-tuning bracket; 54. Guide rail assembly; 55. Box assembly; 56. Slider assembly; 57. Connecting screw assembly;

[0043] 521, flap; 522, front slide; 523, rear slide; 524, bottom plate; 525, flat rotating disk;

[0044] 541, slider; 542, horizontal guide rail; 543, vertical guide rail;

[0045] 551, box body; 552, large round hand wheel; 553, screw rod lifting shaft;

[0046] 561, lower small slider; 562, medium and small slider; 563, fine-tuning slider;

[0047] 571, small round hand wheel; 572, right side support of screw rod; 573, left side support of screw rod; 574, small hand wheel screw rod;

[0048] 5221, front slide groove; 5231, rear slide groove; 5241, bottom plate groove; 5242, bottom plate protruding platform; 5251, turntable groove. DETAILED DESCRIPTION

[0049] The following is further explained in detail through specific implementation methods.

[0050] like Figures 1 to 12 As shown, an embodiment of the present application provides a heavy water reactor push rod maintenance stand, including a main storage cabinet 1, a maintenance platform 2, a slide rail 3, a support frame 4, and a support end head assembly 5.

[0051] The edge of the inspection platform 2 is provided with two slide rails 3 fixedly connected to the main storage cabinet 1. Eight support frames 4 are slidably connected to the slide rails 3, of which four support frames 4 are used to support the pipes, and the other four support frames 4 are used to support the lead screws. Figure 2 As shown, the four support frames 4 on the left are pipe support frames, and the four support frames 4 on the right are screw support frames. Figure 2 The stand arrangement position in the drawing is the reference position, the fixed plate 14 is located on the left, and the other side is located on the right; the double-opening cabinet door 11 is located on the front, and the other side is located on the back.

[0052] The main body storage cabinet 1 on the left side of the platform body is provided with a fixed plate 14, and the right side is not provided with a fixed plate 14, that is, the fixed plate 14 is arranged on one side, and the fixed plate 14 is used to install the support end head assembly 5. Two slide rails 3 are fixed to the edge of the maintenance platform 2, and two separate main body storage cabinets 1 are connected by a connecting plate 16.

[0053] like Figures 4 to 6 As shown, the support frame 4 includes a slide base 46, which is a bilaterally symmetrical structure, and a V-shaped block 41 or a screw block 42 is installed on the slide base 46. The slide base 46 includes an upper slide 461, a lower support plate 462, a V-shaped roller 463, a nut 464, a hand screw 465, and a pin 466. It should be noted that, referring to Figure 2 The direction, such as Figures 4 to 6 The position of the hand screw rod 465 in the middle is the front.

[0054] The upper slide plate 461 is arranged at the upper part and mounted on the lower support plate 462. The upper slide plate 461 is, for example, a rectangular plate structure. The lower support plate 462 is, for example, an I-shaped structure as a whole. The lower front and rear parts of the lower end of the lower support plate 462 both extend downward with a slide rail docking portion. A lower support plate groove 4621 is provided below each slide rail docking portion. The two lower support plate grooves 4621 are symmetrically arranged, and the support frame 4 is clamped into the slide rail 3 through the lower support plate grooves 4621.

[0055] The two lower support plate grooves 4621 are respectively slidably connected to the two slide rails 3, and the position of the slide plate base 46 on the slide rail 3 can be adjusted. The slide plate base 46 is installed with a threaded lifting shaft 44 or a long threaded lifting shaft 45, which can adjust the vertical height of the top V-shaped block 41 or the screw block 42, and then adjust the height of the push rod and the screw supported by it.

[0056] Each lower support plate groove 4621 is equipped with a V-shaped roller 463, which contacts the slide rail 3 and slides on the slide rail 3. The position is adjusted by the bottom V-shaped roller 463, and then the fixed position of the support frame 4 is adjusted. For example, the pipe support frame is adjusted according to the length of the pipe to be equidistantly distributed and not in contact with each other, and the screw support frame is adjusted according to the length of the screw to be equidistantly distributed and not in contact with each other. After the position is adjusted, the hand screw 465 is buckled in to fix the position of each support frame 4. The hand screw 465 is installed on the outside of the lower support plate groove 4621. By rotating the hand screw 465, the upper slide plate 461 can move in the axial direction relative to the lower support plate 462. The V-shaped roller 463 is installed by the nut 464 and the pin 466. 463 is fixed by the pin 466, so that 463 can slide on the slide rail 3. The nut 464 is installed on the inner side of the hand screw rod 465 , the pin shaft 466 is arranged through both sides of the lower support plate groove 4621 and is fixed after being tightened by the nut 464 , and the V-shaped roller 463 is installed on the pin shaft 466 and can rotate around the pin shaft 466 .

[0057] like Figure 4 As shown, a V-shaped block 41 is installed on a slide base 46 to form a pipeline support frame. Two threaded lifting shafts 44 are installed on the slide base 46, and a fixing nut 43 is screwed on the threaded lifting shaft 44. A through hole adapted to the two threaded lifting shafts 44 is opened on the V-shaped block 41. The V-shaped block 41 is sleeved on the upper part of the two threaded lifting shafts 44 through the two through holes. The pipeline support frame adjusts the horizontal height of the V-shaped block 41 through the threaded lifting shaft 44, that is, the V-shaped block 41 moves up and down by rotating the fixing nut 43.

[0058] In one embodiment, the fixing nut 43 used on the pipeline support frame is arranged below the V-shaped block 41 .

[0059] The screw support frame is similar to the pipe support frame, such as Figure 5As shown, a screw block 42 is installed on a slide base 46 to form a screw support frame. Two long thread lifting shafts 45 are installed on the slide base 46, and a fixing nut 43 is screwed on the long thread lifting shaft 45. A through hole adapted to the two long thread lifting shafts 45 is opened on the screw block 42, and the screw block 42 is sleeved on the upper part of the two long thread lifting shafts 45 through the two through holes. The screw support frame adjusts the horizontal height of the screw block 42 through the long thread lifting shaft 45, that is, the screw block 42 moves up and down by rotating the fixing nut 43.

[0060] In one embodiment, the fixing nut 43 used on the screw support frame is arranged in the middle of the screw block 42, that is, a groove is opened in the middle of the screw block 42, and the fixing nut 43 can be installed in the groove.

[0061] like Figure 1 , Figure 2 , Figures 7 to 12 As shown, the support end assembly 5 is installed on the left side of the main storage cabinet 1, and the support end assembly 5 can achieve multi-angle adjustment. The support end assembly 5 includes an upper end transfer fixture 51, a plate set 52, a turntable fine-tuning bracket 53, a guide rail assembly 54, a box assembly 55, a slider assembly 56, and a connecting screw assembly 57. The upper end transfer fixture 51 is installed above the plate set 52, and the function of the upper end transfer fixture 51 is to support the push rod end. The plate set 52 is installed on the turntable fine-tuning bracket 53. The left end of the main storage cabinet 1 is connected with a support end assembly 5 to support the push rod end, and the upper end transfer fixture 51 is placed in the turntable groove 5251, and the turntable fine-tuning bracket 53 clamps the flat turntable 525 and the flap 521, which can fine-tune its tightness and spacing to achieve the effect of slight distance adjustment, so as to realize the alignment of the push rod end on the upper end transfer fixture 51 and the pipe end on the pipe support frame.

[0062] like Figure 8 As shown, the panel set 52 includes a flap 521, a front slide 522, a rear slide 523, a bottom plate 524, and a flat rotating disk 525. The upper end adapter fixture 51 is placed in the rotating disk groove 5251 of the flat rotating disk 525, and the flat rotating disk 525 is clamped on the flap 521 of the lower panel set 52 by a turntable fine-tuning bracket 53, and the bottom plate 524 is fixed on the fixed plate 14 of the main storage cabinet 1.

[0063] The front slide plate 522 has a front slide plate groove 5221, and the effect of the front slide plate groove 5221 is to install the small and medium sliders 562 and the fine adjustment slider 563. The rear slide plate 523 has a rear slide plate groove 5231, and the effect of the rear slide plate groove 5231 is to install the cross guide rail 542.

[0064] The bottom plate 524 includes a bottom plate groove 5241 and a bottom plate protruding platform 5242. The number of the bottom plate grooves 5241 is 2, and the two bottom plate grooves 5241 are arranged in parallel longitudinally, and the bottom plate grooves 5241 are used to install the vertical guide rails 543. The bottom plate protruding platform 5242 is located at the lower part of the bottom plate 524 and is used to install the box assembly 55.

[0065] Two (front and rear position) adjusting screws are installed on the right side of the turntable fine-tuning bracket 53. The cooperation of the two adjusting screws can realize the rotation of the flat rotating disk 525. For example, by loosening the rear screw and tightening the front screw, the right side of the flat rotating disk 525 is pushed back. Since the left side has no adjustment function, 525 will rotate around at this time, thereby driving the rotation of the upper end adapter clamp 51.

[0066] like Fig. 9 As shown, the guide rail assembly 54 includes a slider 541, a horizontal guide rail 542, and a vertical guide rail 543. The function of the guide rail assembly 54 is to realize the up and down movement of the upper end transfer fixture 51. The vertical guide rail 543 is installed behind the rear slide plate 523, and the horizontal guide rail 542 is installed in front of the rear slide plate 523. That is, the horizontal guide rail 542 and the vertical guide rail 543 are not directly connected, and the rear slide plate 523 is arranged in the middle.

[0067] A sliding block 541 (i.e., a vertical block) is provided on the vertical guide rail 543, and a sliding block 541 (i.e., a horizontal block) is also provided on the horizontal guide rail 542. There are two vertical guide rails 543 arranged in parallel, and two horizontal guide rails 542 arranged in parallel. Three blocks 541 are provided on each vertical guide rail 543 or horizontal guide rail 542.

[0068] The vertical guide rail 543 is clamped on the bottom plate groove 5241, and the rear slide plate 523 is installed on the slider 541 of the vertical guide rail 543, that is, the vertical guide rail 543 is installed on the back of the rear slide plate 523. The front of the rear slide plate 523 is installed with a horizontal guide rail 542, and the horizontal guide rail 542 is also provided with a sliding slider 541; Fig.12 As shown, a connecting screw assembly 57 is also installed on the front of the rear slide plate 523, and the connecting screw assembly 57 includes a small round wheel hand wheel 571, a screw right support 572, a screw left support 573, and a small hand wheel screw 574. The small hand wheel screw 574 passes through the screw left support 573 and the screw right support 572, and its right end is connected to the small round wheel hand wheel 571, and the left side is connected to the left support 573 by a thread, and the screw left support 573 and the screw right support 572 are arranged at intervals. The front slide plate 522 is installed on the slider 541, and a fixed connection is adopted.

[0069] The box assembly 55 includes a box 551, a large round wheel hand wheel 552, and a screw lifting shaft 553. The large round wheel hand wheel 552 is arranged across the box 551, and the screw lifting shaft 553 is arranged vertically through the box 551. After the box assembly 55 is assembled, the platform 5242 protruding from the bottom plate of the bottom plate 524 passes through and abuts against the bottom of the rear slide 523 and the front slide 522. The top of the box assembly 55 is stuck in the groove 5221 of the front slide and is supported in front of the flap 521. The box assembly 55 can realize the up and down movement of the rear slide 523, and the implementation method is: by rotating the box large round wheel hand wheel 552, the up and down movement of the screw lifting shaft 553 can be realized, and the screw lifting shaft 553 is supported on the lower part of the rear slide 523. After the screw lifting shaft 553 moves up and down, it can drive the up and down movement of the rear slide 523.

[0070] like Fig.11 As shown, the slider assembly 56 includes a lower small slider 561, a medium and small slider 562, and a fine-tuning slider 563. The lower small slider 561 is installed on the rear skateboard 523, the medium and small slider 562 is installed on the lower small slider 561, and the fine-tuning slider 563 is installed in the groove of the front skateboard groove 5221. The main function of the slider assembly 56 is to realize the rotation of the slider assembly 56 relative to the plate set 52 or the upper end adapter clamp 51.

[0071] like Figures 7 to 12 As shown, the connecting screw assembly 57 and the guide rail assembly 54 are connected together to connect the front slide 522 and the rear slide 523, and the sliders 541 on the guide rail assembly 54 are evenly spaced on the transverse guide rail 542 to achieve the fixation and positioning of the guide rail assembly 54, and the connecting screw assembly 57 is further connected and fixed, and the small round wheel handwheel 571 of the connecting screw assembly 57 can adjust the fixing tightness by rotating, which is easy to adjust.

[0072] The three sliders 541 on the guide rail assembly 54 are evenly spaced on the transverse guide rail 542, so that the guide rail assembly 54 can complete the fixation and clamping of the front slide 522 and the rear slide 523, and the screw rod assembly 57 is connected for further connection and fixation. The small round wheel handwheel 571 connecting the screw rod assembly 57 can change the fixing tightness by rotating, which is easy to adjust.

[0073] The box assembly 55 and the guide rail assembly 54 are connected together to the front slide 522 and the rear slide 523. The three sliders 541 on the guide rail assembly 54 (the horizontal guide rail 542) are evenly spaced between the two vertical guide rails 543, so that the guide rail assembly 54 can complete the fixation and clamping of the rear slide 523 and the bottom plate 524. The box assembly 55 is fixed through the bottom plate protruding platform 5242 of the bottom plate 524. The large round handwheel 552 of the box assembly 55 can change the fixing tightness by rotating, which is easy to adjust.

[0074] In one embodiment, Figure 1 and Figure 3As shown, the maintenance stand of the present application also includes a screw hanger 6, an organ protective cover 7, and a guide shaft 8. The guide shaft 8 is used to fix the organ protective cover 7. The five screw hangers 6 and the guide shaft 8 are installed behind the side (right end storage cabinet) where the screw is placed. The five screw hangers 6 are distributed at equal distances and do not touch each other. The organ protective cover 7 is placed in the middle of the rear end of the main storage cabinet 1. The organ protective cover 7 behind the main storage cabinet 1 can be easily folded and can be stored in the middle of the cabinet when not in use. When the push rod parts do not need to be inspected, the screw to be inspected is hung on the screw hanger 6, the organ protective cover 7 is pulled open, and the screw is covered inside the organ protective cover 7 to prevent dust from falling on the surface of the screw to be inspected and increasing the workload for subsequent work.

[0075] In one embodiment, Figure 2 As shown, the main body of the stand is composed of two identical separate main storage cabinets 1 spliced ​​together on the left and right. Each main storage cabinet 1 is provided with two double-opening doors 11 and six drawers 12 at the front end. The two double-opening doors 11 are arranged on both sides, and the six drawers 12 are arranged between the two double-opening doors 11, arranged in two rows, with three drawers 12 in each row. All the double-opening doors 11 and drawers 12 of the main storage cabinet 1 do not touch each other and are used to store practical maintenance tools. A drawer lock 13 is provided in the middle of the drawer 12.

[0076] In one embodiment, the double doors 11 do not touch each other, are opened and closed by springs, and can hold slightly larger tools. The drawers 12 do not touch each other, and small parts such as wrenches, screws, and nuts can be placed in the drawers 12. A drawer lock 13 is provided to lock the drawer 12.

[0077] In one embodiment, twelve Forma casters 15 are connected to the lower part of the stand body, and each main storage cabinet 1 is provided with six Forma casters 15 .

[0078] The use process of the maintenance bench in this application is as follows:

[0079] The four support frames 4 on the left side of the maintenance stand are used to support the push rod, and the four support frames 4 on the right side are used to support the screw rod. During use, the eight support frames 4 are first adjusted to the right position, and the push rod to be repaired is placed. The heavier end of the push rod is the push rod head, which should be placed on the upper end adapter clamp 51 of the support end assembly 5, and the main body is supported by the four support frames 4 on the left side. The support end assembly 5 adjusts the position of the push rod head by twisting the large round wheel hand wheel 552. The slide base 46 contained in the support frame 4 is connected to the threaded lifting shaft 44 and connected to the V-shaped block 41, and the height can be adjusted according to the actual maintenance requirements of the push rod. At the same time, the slide base 46 contained in the four support frames 4 on the right side is connected to the long threaded lifting shaft 45, and the height can also be adjusted according to the actual maintenance requirements of the push rod, and the screw rod can be placed on the gap of the screw rod block 42. After the position is adjusted, the screw is pulled out through the power system and device inside the equipment and placed on the gap of the screw rod block 42.

[0080] During maintenance, the right support frame 4 can place four screws at a time, and the remaining screws to be repaired can be placed on the screw hanger 6 set at the right part of the rear end of the main storage cabinet 1, and then the accordion protective cover 7 can be pulled open to cover the screws to be repaired in the accordion protective cover 7 to prevent dust from falling on the surface of the screws to be repaired.

[0081] After the inspection, the height of all the support frames 4 can be adjusted according to the support end assembly 5 to ensure that the push rod and the lead screw are on the same horizontal plane, and then the lead screw can be pushed back into the push rod through the power system and device inside the equipment. The operation is very convenient.

[0082] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A heavy water reactor push rod maintenance stand, characterized in that: It comprises an inspection platform (2), wherein a slide rail (3) is provided on the inspection platform (2), a slidable support frame (4) is provided on the slide rail (3), and a support end head assembly (5) is provided on one side of the inspection platform (2) for multi-angle adjustment; The support end head assembly (5) comprises an upper end transfer fixture (51), a plate set (52), a turntable fine-tuning bracket (53) and a guide rail assembly (54); the plate set (52) comprises a flap (521), a front slide plate (522), a rear slide plate (523), a bottom plate (524) and a horizontal rotating disk (525); the horizontal rotating disk (525) is clamped on the flap (521) through the turntable fine-tuning bracket (53); the guide rail assembly (54) comprises a horizontal guide rail (542) and a vertical guide rail (543); the horizontal guide rail (542) is provided with a horizontal slider, and the vertical guide rail (543) is provided with a vertical slider; the vertical guide rail (543) is mounted on the bottom plate (524), the vertical slider is connected to the back of the rear slide plate (523), the horizontal guide rail (542) is mounted on the front of the rear slide plate (523), and the horizontal slider is connected to the front slide plate (522).

2. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: The rear slide plate (523) has a rear slide plate groove (5231), the horizontal guide rail (542) is installed in the rear slide plate groove (5231), the bottom plate (524) has a bottom plate groove (5241), and the vertical guide rail (543) is installed in the bottom plate groove (5241).

3. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: The support end head assembly (5) further comprises a box assembly (55), wherein the box assembly (55) comprises a box (551), a large round hand wheel (552) and a screw rod lifting shaft (553), wherein the large round hand wheel (552) is arranged transversely through the box (551), and the screw rod lifting shaft (553) is arranged longitudinally through the box (551).

4. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: The support end head assembly (5) further comprises a slider assembly (56), the slider assembly (56) comprising a lower small slider (561), a small and medium slider (562) and a fine-tuning slider (563), the lower small slider (561) being mounted on the rear slide plate (523), the small and medium slider (562) being mounted on the lower small slider (561), and the fine-tuning slider (563) being mounted in a groove of the front slide plate groove (5221).

5. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: A connecting screw assembly (57) is mounted on the front of the rear slide plate (523). The connecting screw assembly (57) comprises a small round handwheel (571), a screw right support (572), a screw left support (573) and a small handwheel screw (574). The small handwheel screw (574) passes through the screw left support (573) and the screw right support (572) to be connected to the small round handwheel (571).

6. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: The support frame (4) comprises a slide base (46), the slide base (46) having an upper slide (461), a lower support plate (462), a V-shaped roller (463) and a hand screw (465), the upper slide (461) being mounted on the lower support plate (462), a lower support plate groove (4621) being provided at the lower front end and the lower rear end of the lower support plate (462), the V-shaped roller (463) being mounted in the lower support plate groove (4621), and the hand screw (465) being mounted on the outer side of the lower support plate groove (4621).

7. The heavy water reactor push rod maintenance stand according to claim 6, characterized in that: A threaded lifting shaft (44) is mounted on the slide base (46), a fixing nut (43) is screwed onto the threaded lifting shaft (44), and a V-shaped clamping block (41) is movably mounted on the threaded lifting shaft (44).

8. The heavy water reactor push rod maintenance stand according to claim 6, characterized in that: A long thread lifting shaft (45) is mounted on the slide base (46), a fixing nut (43) is screwed onto the long thread lifting shaft (45), and a screw rod clamping block (42) is movably mounted on the long thread lifting shaft (45).

9. The heavy water reactor push rod maintenance stand according to claim 1, characterized in that: The inspection platform (2) is arranged on a main storage cabinet (1); the main storage cabinet (1) comprises a double-opening cabinet door (11) and a drawer (12); and the drawer (12) is provided with a drawer lock (13).

10. The heavy water reactor push rod maintenance stand according to claim 9, characterized in that: A screw rod hanger (6) and an organ protection cover (7) are provided on the back of the main storage cabinet (1); the organ protection cover (7) is fixed by a guide rail shaft (8).

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