Nuclear power plant pressure vessel flange screw hole cleaning device and nuclear power plant cleaning mechanism thereof

Abstract

The utility model discloses a nuclear power plant pressure vessel flange screw hole cleaning device and a nuclear power plant cleaning mechanism thereof. The nuclear power plant cleaning mechanism comprises a support, a water chamber cavity, a flushing pipe, a first suction pipe, a second suction pipe and a driving assembly. The water chamber cavity is provided with a water cavity; the upper end of the flushing pipe is connected with the water chamber cavity and communicated with the water cavity, an inner cavity of the flushing pipe is provided with a medium channel, and the lower end of the flushing pipe is provided with a nozzle and a suction part; a dynamic seal mounting seat is arranged in the water chamber cavity, the upper end of the first suction pipe is connected with the dynamic seal mounting seat, and the lower end of the first suction pipe is connected with the suction part; the driving assembly comprises a driving motor, a first gear and a second gear, the driving end of the driving motor is fixedly connected with the first gear, and the second gear is fixedly installed on the flushing pipe and engaged with the first gear. By applying the nuclear power plant cleaning mechanism, workers do not need to conduct manual cleaning, the cleaning efficiency of the flange screw holes of the nuclear power plant pressure vessel can be better improved, and the health and safety of the workers are effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a device for cleaning screw holes of flanges of pressure vessels of nuclear power plants and a cleaning mechanism of the nuclear power plants. Background Art

[0002] The flange of a nuclear power plant pressure vessel has about 58 screw holes. When the screw holes need to be inspected and maintained, the inspection and maintenance method is usually for the staff to flush them with a handheld spray gun, and then use a handheld suction device to suck out the cleaning medium, and then perform subsequent drying and polishing operations. The operation is cumbersome, the labor cost is high, and there are radiation safety issues for the staff. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a device for cleaning screw holes of flanges of pressure vessels of nuclear power plants and a cleaning mechanism of the nuclear power plants.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a nuclear power plant cleaning mechanism, including a bracket, a water chamber cavity, a flushing pipe, a first suction pipe, a second suction pipe, and a driving component;

[0005] The bracket includes a mounting plate, the mounting plate has a first surface and a second surface relative to each other, the mounting plate is provided with a first through hole penetrating the first surface and the second surface; the water chamber cavity is mounted on the first surface, the water chamber cavity has a water cavity, the bottom surface of the water chamber cavity is provided with a second through hole, the second through hole is arranged opposite to the first through hole; the flushing pipe is passed through the first through hole and the second through hole, the upper end of the flushing pipe is connected to the water chamber cavity and the flushing pipe is in communication with the water cavity, the inner cavity of the flushing pipe is provided with a medium channel, the circumferential side surface of the lower end of the flushing pipe is provided with a plurality of nozzles, and the end of the lower end of the flushing pipe is provided with a suction portion;

[0006] A first mounting hole and a second mounting hole are also provided at the upper end of the water chamber cavity, the first mounting hole is communicated with the water chamber, and the first mounting hole is used to connect with a medium source; a mounting groove is provided in the water chamber cavity, the mounting groove and the second mounting hole are arranged opposite to each other and are communicated with each other; a dynamic seal mounting seat is provided in the mounting groove, the first suction pipe is located in the inner cavity of the flushing pipe, and the outer peripheral wall surface of the first suction pipe and the inner peripheral wall surface of the flushing pipe define the medium channel; the upper end of the first suction pipe is connected to the dynamic seal mounting seat, and the lower end of the first suction pipe is connected to the suction part; one end of the second suction pipe is installed on the second mounting hole, and the second suction pipe is communicated with the first suction pipe;

[0007] The driving assembly includes a driving motor, a first gear and a second gear. The driving motor is installed on the first surface. The first gear is located on one side of the second surface. The driving end of the driving motor is fixedly connected to the first gear. The second gear is fixedly installed on the part of the flushing pipe protruding from the second surface, and the second gear is meshed with the first gear.

[0008] In some embodiments, a bearing groove is further provided in the first through hole;

[0009] The nuclear power plant cleaning mechanism also includes a deep groove ball bearing, which is installed in the bearing groove and sleeved on a portion of the outer circumference of the flushing pipe.

[0010] In some embodiments, a plurality of first sealing rings are provided between the circumferential wall surface of the upper end of the flushing tube and the circumferential inner wall surface of the second through hole.

[0011] In some embodiments, the nuclear power plant cleaning mechanism also includes a plurality of connecting shafts, which are arranged at intervals, and the upper ends of the connecting shafts are connected to the lower ends of the dynamic seal mounting seats, and the lower ends of the connecting shafts are connected to the upper ends of the flushing pipes.

[0012] In some embodiments, a plurality of second sealing rings are further provided between the circumferential wall surface of the dynamic seal mounting seat and the circumferential inner wall surface of the mounting groove.

[0013] In some embodiments, the nuclear power plant cleaning mechanism further includes a bearing, the bearing is located in the mounting groove, and the bearing is sleeved on the circumferential wall surface of the upper end of the dynamic seal mounting seat.

[0014] In some embodiments, the first mounting hole is provided with a first connector, and the first connector is used to connect to a medium source.

[0015] In some embodiments, a second joint is provided on the dynamic seal mounting seat, and the second joint is connected to the upper end of the first suction pipe.

[0016] In some embodiments, the second mounting hole is provided with a third joint, and the third joint is connected to one end of the second suction pipe.

[0017] In some embodiments, the water chamber cavity includes a first cavity and a second cavity connected to each other; the first mounting hole, the second mounting hole and the mounting groove are formed on the first cavity;

[0018] The second cavity includes a bottom wall and a peripheral wall extending from the bottom wall, the upper surface of the bottom wall and the inner surface of the peripheral wall define the water cavity, and the bottom wall is provided with the second through hole.

[0019] In some embodiments, a third sealing ring is further provided between the upper surface of the peripheral wall and the lower surface of the first cavity.

[0020] In some embodiments, the irrigation tube is a metal tube.

[0021] In some embodiments, the number of the nozzles is at least four, and the at least four nozzles are spaced apart along the circumference of the flushing pipe.

[0022] In some embodiments, the nuclear power plant cleaning mechanism further includes a lifting assembly;

[0023] The bracket also includes a connecting plate vertically connected to the mounting plate, and the lifting assembly is connected to the connecting plate to drive the connecting plate to move back and forth along the height direction.

[0024] The utility model also discloses a nuclear power plant pressure vessel flange screw hole cleaning device, comprising a vehicle body and a nuclear power plant cleaning mechanism as described in any of the above embodiments and arranged on the vehicle body.

[0025] The implementation of the utility model has the following beneficial effects: by using the nuclear power plant cleaning mechanism, there is no need for manual cleaning by staff, which can better improve the cleaning efficiency of the flange screw holes of the nuclear power plant pressure vessel, and can prevent staff from being exposed to radiation during the cleaning process, which can effectively protect the health and safety of staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 It is a schematic diagram of the application of the screw hole cleaning device for flange of a nuclear power plant pressure vessel in some embodiments of the utility model;

[0028] Figure 2 It is a schematic diagram of the structure of a nuclear power plant cleaning mechanism in some embodiments of the utility model;

[0029] Figure 3 It is one of the partial structural schematic diagrams of the nuclear power plant cleaning mechanism in some embodiments of the utility model;

[0030] Figure 4 This is the second partial structural schematic diagram of the nuclear power plant cleaning mechanism in some embodiments of the utility model;

[0031] Figure 5It is a cross-sectional view of a part of the structure of a nuclear power plant cleaning mechanism in some embodiments of the utility model;

[0032] Figure 6 yes Figure 5 A detailed view of a cross-sectional view of a portion of the structure of a nuclear power plant cleaning mechanism is shown. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0034] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical 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. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0035] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0036] See also Figure 1The utility model shows a nuclear power plant pressure vessel flange screw hole cleaning device, including a vehicle body 100 and a nuclear power plant cleaning mechanism arranged on the vehicle body 100. The vehicle body 100 can move on the end surface of the nuclear power plant pressure vessel flange 200 to inspect and maintain the screw holes 201 of the nuclear power plant pressure vessel flange 200, such as cleaning, drying and polishing.

[0037] Among them, the nuclear power plant cleaning mechanism can clean the screw hole 201 and suck out the cleaning medium (or flushing medium or cleaning medium). The cleaning medium here can be a high-pressure cleaning medium, and the cleaning medium can include but is not limited to pure water, deoxygenated water, desalted water or other solutions containing cleaning agents.

[0038] See also Figures 2 to 6 For details, please refer to Figure 5 and Figure 6 In some embodiments, the nuclear power plant cleaning mechanism includes a bracket 10, a water chamber cavity 20, a flushing pipe 30, a first suction pipe 40, a second suction pipe 50, and a driving assembly 60.

[0039] The bracket 10 may include a mounting plate 11 . The mounting plate 11 has a first surface and a second surface opposite to each other. The mounting plate 11 is provided with a first through hole 111 penetrating the first surface and the second surface.

[0040] The water chamber cavity 20 is roughly a square structure, and the water chamber cavity 20 can be installed on the first surface of the mounting plate 11. The water chamber cavity 20 has a water cavity A. The bottom surface of the water chamber cavity 20 is provided with a second through hole 20a, and the second through hole 20a is arranged opposite to the first through hole 111; the flushing pipe 30 is penetrated by the first through hole 111 and the second through hole 20a, the upper end of the flushing pipe 30 is connected to the water chamber cavity 20 and the flushing pipe 30 is connected to the water cavity A, the inner cavity of the flushing pipe 30 is provided with a medium channel B, and the circumferential side of the lower end of the flushing pipe 30 is provided with a plurality of nozzles 31, and the end of the lower end of the flushing pipe 30 is provided with a suction part 32, which can be a suction joint.

[0041] The upper end of the water chamber cavity 20 is also provided with a first mounting hole 20b and a second mounting hole 20c, and the first mounting hole 20b and the second mounting hole 20c are arranged at intervals. The first mounting hole 20b is connected to the water cavity A. The first mounting hole 20b is used to connect to the medium source, which can be connected to the medium source through a connecting pipe. The medium source can include a liquid storage container, and the liquid storage container stores a cleaning medium. The cleaning medium can be pure water, deoxygenated water, desalted water or other solutions containing cleaning agents. The connecting pipe can be connected to a water pump to transport the cleaning medium under high pressure.

[0042] A mounting groove 20d is provided in the water chamber cavity 20, and the mounting groove 20d is arranged opposite to the second mounting hole 20c and the two are connected; a dynamic seal mounting seat 70 is provided in the mounting groove 20d, and the first suction pipe 40 is located in the inner cavity of the flushing pipe 30, and the outer peripheral wall of the first suction pipe 40 and the inner peripheral wall of the flushing pipe 30 define a medium channel B; the upper end of the first suction pipe 40 is connected to the dynamic seal mounting seat 70, and the lower end of the first suction pipe 40 is connected to the suction part 32, and the first suction pipe 40 can be coaxially arranged with the flushing pipe 30; one end of the second suction pipe 50 is installed on the second mounting hole 20c, and the second suction pipe 50 is connected to the first suction pipe 40, and the other end of the second suction pipe 50 can be connected to a liquid recovery container, such as a waste liquid container, etc. The second suction pipe 50 can be connected to a suction pump, or a negative pressure generator, to suck and recover the liquid in the screw hole 201.

[0043] The driving assembly 60 may include a driving motor 61, a first gear 62 and a second gear 63. The driving motor 61 is mounted on the first surface, the first gear 62 is located on one side of the second surface, the driving end of the driving motor 61 is fixedly connected to the first gear 62, the second gear 63 is fixedly mounted on the portion of the flushing tube 30 protruding from the second surface, and the second gear 63 is meshed with the first gear 62. The driving motor 61 can drive the first gear 62 to rotate, the first gear 62 drives the second gear 63 to rotate, and then drives the flushing tube 30 to rotate. The driving motor 61 may be a servo motor, which has high precision and forward and reverse functions.

[0044] Among them, the cleaning medium enters the water chamber A and the medium channel B in turn and then flushes the inner wall surface of the screw hole 21 through the nozzle 31. The driving motor 61 can drive the first gear 62 to rotate, and the first gear 62 drives the second gear 63 to rotate, and then drives the flushing pipe 30 to rotate, so that the water flow ejected by the nozzle 31 can achieve flushing and cleaning in the circumferential direction.

[0045] After the flushing and cleaning is completed, the suction part 32 can suck the cleaning medium in the screw hole 201 and draw it out of the screw hole 201 through the first suction pipe 40 and the second suction pipe 50 for subsequent drying and polishing operations.

[0046] Understandably, the application of the nuclear power plant cleaning mechanism eliminates the need for manual cleaning by staff, can better improve the cleaning efficiency of the screw holes of the flange of the nuclear power plant pressure vessel, can prevent staff from being exposed to radiation during the cleaning process, and can effectively protect the health and safety of staff.

[0047] Continue reading Figure 5 and Figure 6In some embodiments, a bearing groove 112 is further provided in the first through hole 111 , and the nuclear power plant cleaning mechanism also includes a deep groove ball bearing 113 , which is installed in the bearing groove 112 , and the deep groove ball bearing 113 is sleeved on a portion of the outer periphery of the flushing pipe 30 .

[0048] In some embodiments, a plurality of first sealing rings 33 are provided between the circumferential wall surface of the upper end of the flushing tube 30 and the circumferential inner wall surface of the second through hole 20a. The first sealing rings 33 may be provided with two, and the two first sealing rings 33 are provided at intervals along the axial direction of the flushing tube 30. The first sealing rings 33 can improve the sealing performance. Further, the circumferential wall surface of the upper end of the flushing tube 30 may be provided with a first sealing groove for accommodating the first sealing ring 33. The setting position and setting number of the first sealing groove may be selected and set according to actual needs, and are not specifically limited here. The first sealing ring 33 may be a silicone sealing ring.

[0049] Continue reading Figure 5 and Figure 6 In some embodiments, the nuclear power plant cleaning mechanism further includes a plurality of connecting shafts 80, which are arranged at intervals, and the upper end of the connecting shaft 80 is connected to the lower end of the dynamic seal mounting seat 70, and the lower end of the connecting shaft 80 is connected to the upper end of the flushing pipe 30. The connecting shafts 80 may be three, and the three connecting shafts 80 are arranged at intervals, or the connecting shafts 80 may be two, four or any other number. The connecting shaft 80 plays a connecting and supporting role, and the part of the connecting shaft 80 located between the flushing pipe 30 and the dynamic seal mounting seat 70 is located in the water chamber A, and will not interfere with the cleaning medium.

[0050] Continue reading Figure 5 and Figure 6 In some embodiments, a plurality of second sealing rings 71 are provided between the circumferential wall surface of the dynamic seal mounting seat 70 and the circumferential inner wall surface of the mounting groove 20d. Two second sealing rings 71 may be provided, and the two second sealing rings 71 may be provided at intervals along the axial direction of the dynamic seal mounting seat 70. The second sealing ring 71 may improve the sealing performance. Furthermore, the circumferential wall surface of the dynamic seal mounting seat 70 may be provided with a second sealing groove for accommodating the second sealing ring 71. The setting position and setting number of the second sealing groove may be selected and set according to actual needs, and are not specifically limited here. The second sealing ring 71 may be a silicone sealing ring.

[0051] Continue reading Figure 6 In some embodiments, the nuclear power plant cleaning mechanism further includes a bearing 72, which is located in the mounting groove 20d and sleeved on the circumferential wall surface of the upper end of the dynamic seal mounting seat 70. The bearing 72 can make the dynamic seal mounting seat 70 rotate more smoothly.

[0052] Continue reading Figure 6 In some embodiments, the first mounting hole 20b is provided with a first connector 23, and the first connector 23 is used to connect to a medium source. The first connector 23 may be a quick connector.

[0053] Continue reading Figure 6 In some embodiments, the dynamic seal mounting seat 70 is provided with a second joint 24, and the second joint 24 is connected to the upper end of the first suction pipe 40. The second joint 24 can be a quick joint.

[0054] Continue reading Figure 6 In some embodiments, the second mounting hole 20c is provided with a third joint 25, and the third joint 25 is connected to one end of the second suction pipe 50. The third joint 25 can be a quick joint.

[0055] Continue reading Figure 6 In some embodiments, the water chamber cavity 20 includes a first cavity 21 and a second cavity 22 connected to each other, and the first cavity 21 and the second cavity 22 can be fixed by threaded connection or welding; the first cavity 21 can be roughly a square columnar structure, and a first mounting hole 20b, a second mounting hole 20c and a mounting groove 20d are formed on the first cavity 21.

[0056] The second cavity 22 may be substantially in the shape of a square column. The second cavity 22 may include a bottom wall and a peripheral wall extending from the bottom wall. The upper surface of the bottom wall and the inner surface of the peripheral wall define a water cavity A. The bottom wall is provided with a second through hole 20a.

[0057] Furthermore, a third sealing ring 211 is provided between the upper surface of the peripheral wall and the lower surface of the first cavity 21 to improve the sealing performance of the water chamber cavity 20 .

[0058] In some embodiments, the flushing tube 30 is a metal tube, for example, a stainless steel tube, such as a 316L stainless steel tube.

[0059] In some embodiments, the number of the nozzles 31 is at least four, and the at least four nozzles 31 are arranged at intervals along the circumference of the flushing pipe 30 .

[0060] For example Figure 2 As shown, in some embodiments, the nuclear power plant cleaning mechanism also includes a lifting assembly 90, the bracket 10 is roughly L-shaped, and the bracket 10 also includes a connecting plate 12 vertically connected to the mounting plate 11. The lifting assembly 90 is connected to the connecting plate 12 to drive the connecting plate 12 to move back and forth in the height direction.

[0061] The lifting assembly 90 may include but is not limited to a linear module, or a screw lifting assembly, or a motor guide lifting assembly, or a pneumatic cylinder lifting assembly, or a hydraulic cylinder lifting assembly.

[0062] During the cleaning process of the nuclear power plant cleaning mechanism, the driving assembly 60 can drive the flushing pipe 30 to rotate circumferentially along its axis, and the lifting assembly 90 can drive the flushing pipe 30 to move back and forth in the height direction / longitudinal direction to comprehensively clean the screw hole 201.

[0063] For example Figure 2 As shown, in some embodiments, the portion of the flushing tube 30 protruding from the water chamber cavity 20 may also be provided with a negative pressure component, etc. The negative pressure component may include a negative pressure cover, which may be provided on the screw hole 201 to prevent the cleaning medium from spraying out of the screw hole 201 during the flushing process.

[0064] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A cleaning mechanism for a nuclear power plant, characterized in that: It comprises a bracket (10), a water chamber cavity (20), a flushing pipe (30), a first suction pipe (40), a second suction pipe (50), and a driving assembly (60); The bracket (10) comprises a mounting plate (11), the mounting plate (11) having a first surface and a second surface opposite to each other, the mounting plate (11) being provided with a first through hole (111) penetrating the first surface and the second surface; the water chamber cavity (20) being mounted on the first surface, the water chamber cavity (20) having a water cavity (A), the bottom surface of the water chamber cavity (20) being provided with a second through hole (20a), the second through hole (20a) and the first through hole (111) being connected to each other. 1) are arranged relative to each other; the flushing pipe (30) is inserted into the first through hole (111) and the second through hole (20a); the upper end of the flushing pipe (30) is connected to the water chamber cavity (20) and the flushing pipe (30) is communicated with the water cavity (A); the inner cavity of the flushing pipe (30) is provided with a medium channel (B); the circumferential side surface of the lower end of the flushing pipe (30) is provided with a plurality of nozzles (31); and the end of the lower end of the flushing pipe (30) is provided with a suction portion (32); The water chamber body (20) is also provided with a first mounting hole (20b) and a second mounting hole (20c) at the upper end thereof, wherein the first mounting hole (20b) is in communication with the water chamber (A), and the first mounting hole (20b) is used to connect with a medium source; a mounting groove (20d) is provided in the water chamber body (20), wherein the mounting groove (20d) and the second mounting hole (20c) are arranged opposite to each other and are in communication with each other; a dynamic seal mounting seat (70) is provided in the mounting groove (20d), and the first suction pipe (40) is located in the water chamber body (20). The inner cavity of the flushing tube (30), the outer peripheral wall surface of the first suction tube (40) and the inner peripheral wall surface of the flushing tube (30) define the medium channel (B); the upper end of the first suction tube (40) is connected to the dynamic seal mounting seat (70), and the lower end of the first suction tube (40) is connected to the suction portion (32); one end of the second suction tube (50) is installed on the second mounting hole (20c), and the second suction tube (50) is connected to the first suction tube (40); The driving assembly (60) comprises a driving motor (61), a first gear (62) and a second gear (63); the driving motor (61) is mounted on the first surface; the first gear (62) is located on one side of the second surface; the driving end of the driving motor (61) is fixedly connected to the first gear (62); the second gear (63) is fixedly mounted on a portion of the flushing pipe (30) protruding from the second surface; and the second gear (63) is meshed with the first gear (62).

2. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: A bearing groove (112) is also provided in the first through hole (111); The nuclear power plant cleaning mechanism also includes a deep groove ball bearing (113), the deep groove ball bearing (113) is installed in the bearing groove (112), and the deep groove ball bearing (113) is sleeved on a portion of the outer circumference of the flushing pipe (30).

3. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: A plurality of first sealing rings (33) are provided between the circumferential wall surface of the upper end of the flushing pipe (30) and the circumferential inner wall surface of the second through hole (20a).

4. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The nuclear power plant cleaning mechanism further comprises a plurality of connecting shafts (80), wherein the plurality of connecting shafts (80) are arranged at intervals, and the upper ends of the connecting shafts (80) are connected to the lower ends of the dynamic seal mounting seats (70), and the lower ends of the connecting shafts (80) are connected to the upper ends of the flushing pipes (30).

5. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: A plurality of second sealing rings (71) are also provided between the circumferential wall surface of the dynamic seal mounting seat (70) and the circumferential inner wall surface of the mounting groove (20d).

6. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The nuclear power plant cleaning mechanism also includes a bearing (72), the bearing (72) is located in the mounting groove (20d), and the bearing (72) is sleeved on the circumferential wall surface of the upper end of the dynamic seal mounting seat (70).

7. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The first mounting hole (20b) is provided with a first joint (23), and the first joint (23) is used to be connected to a medium source.

8. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The dynamic seal mounting seat (70) is provided with a second joint (24), and the second joint (24) is connected to the upper end of the first suction pipe (40).

9. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The second mounting hole (20c) is provided with a third joint (25), and the third joint (25) is connected to one end of the second suction pipe (50).

10. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The water chamber cavity (20) comprises a first cavity (21) and a second cavity (22) connected to each other; the first mounting hole (20b), the second mounting hole (20c) and the mounting groove (20d) are formed on the first cavity (21); The second cavity (22) comprises a bottom wall and a peripheral wall extending from the bottom wall, the upper surface of the bottom wall and the inner surface of the peripheral wall define the water cavity (A), and the bottom wall is provided with the second through hole (20a).

11. The nuclear power plant cleaning mechanism according to claim 10, characterized in that: A third sealing ring (211) is also provided between the upper surface of the peripheral wall and the lower surface of the first cavity (21).

12. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The flushing pipe (30) is a metal pipe.

13. The nuclear power plant cleaning mechanism according to claim 1, characterized in that: The number of the nozzles (31) is at least four, and the at least four nozzles (31) are arranged at intervals along the circumference of the flushing pipe (30).

14. The nuclear power plant cleaning mechanism according to any one of claims 1 to 13, characterized in that: The nuclear power plant cleaning mechanism further comprises a lifting assembly (90); The bracket (10) further comprises a connecting plate (12) vertically connected to the mounting plate (11), and the lifting assembly (90) is connected to the connecting plate (12) for driving the connecting plate (12) to move back and forth in a height direction.

15. A device for cleaning screw holes of flanges of pressure vessels in nuclear power plants, characterized in that: It comprises a vehicle body, and a nuclear power plant cleaning mechanism as claimed in any one of claims 1 to 14 arranged on the vehicle body.

Images