Nuclear power plant pressure vessel flange screw hole cleaning equipment and positioning drying device thereof

Abstract

The utility model discloses nuclear power plant pressure vessel flange screw hole cleaning equipment and a positioning and drying device thereof. The positioning and drying device comprises a positioning and drying mechanism and a lifting mechanism. The positioning drying mechanism comprises a first sleeve, a second sleeve, an air guide pipe, a suction pipe and an air conveying pipe; the second sleeve is mounted in the first sleeve; an air guide hole is formed in the side wall of the first sleeve; the air guide pipe is connected with the first sleeve; a suction opening of the suction pipe is formed in the bottom of the first sleeve; the first sleeve is provided with a first through hole, the second sleeve is provided with a second through hole, the first through hole and the second through hole are oppositely arranged to form limiting channels, each limiting channel is provided with a positioning and fixing block, and the air conveying pipe is used for driving the positioning and fixing blocks to be tensioned outwards or shrunk inwards. The positioning drying device is applied, manual drying by workers is not needed, the drying operation efficiency of the flange screw holes of the pressure vessel of the nuclear power plant can be better improved, the workers can be prevented from being radiated in the drying operation process, and the health and safety of the workers can be effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a nuclear power plant pressure vessel flange screw hole cleaning device and a positioning drying device thereof. Background Art

[0002] The flange of the pressure vessel of a nuclear power plant has about 58 screw holes. When the screw holes need to be inspected and maintained, the inspection and maintenance method is usually to clean the screw holes first, and then dry them after cleaning. When entering the drying operation, the workers usually use a hand-held drying gun to dry the screw holes. The operation is cumbersome, the labor cost is high, and there are radiation safety issues for the workers. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a nuclear power plant pressure vessel flange screw hole cleaning device and a positioning drying device thereof.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a positioning drying device, including a positioning drying mechanism and a lifting mechanism connected to the positioning drying mechanism to drive the positioning drying mechanism to move in the height direction;

[0005] The positioning and drying mechanism comprises a first sleeve, a second sleeve, an air guide pipe, a suction pipe and an air delivery pipe; the second sleeve is installed in the first sleeve, and the outer side surface of the second sleeve and the inner side surface of the first sleeve form an air flow space; the inner cavity of the second sleeve forms a driving space; the side wall of the first sleeve is provided with a plurality of air guide holes, the air guide pipe is connected to the first sleeve and the air guide pipe is connected to the air flow space to introduce drying gas into the air flow space; the suction pipe is passed through the first sleeve, and the suction port of the suction pipe is provided at the bottom of the first sleeve;

[0006] The circumferential side wall of the first sleeve is provided with a plurality of first through holes, and the circumferential side wall of the second sleeve is provided with a plurality of second through holes. The first through holes and the second through holes are arranged opposite to each other one by one to form a limiting channel. Each of the limiting channels is provided with a positioning and fixing block. The air supply pipe is passed through the first sleeve and connected to the second sleeve, and the air supply pipe is connected to the driving space. The air supply pipe is used to supply or exhaust air to the driving space to drive the positioning and fixing block to be tensioned outward or contracted inward.

[0007] In some embodiments, the first sleeve is coaxially disposed with the second sleeve.

[0008] In some embodiments, an axial dimension of the second sleeve is less than or equal to one-half of an axial dimension of the first sleeve.

[0009] In some embodiments, the air guide holes are arranged at intervals along the axial direction and the circumferential direction of the first sleeve.

[0010] In some embodiments, the air guide holes are at least one of round holes and elongated holes.

[0011] In some embodiments, the suction tube is inserted into the first sleeve and the second sleeve.

[0012] In some embodiments, there are multiple positioning and fixing blocks, and the multiple positioning and fixing blocks are arranged at intervals along the circumference of the first sleeve on the same plane.

[0013] In some embodiments, the plurality of positioning and fixing blocks form a positioning and fixing block group;

[0014] The number of the positioning and fixing block groups is at least two.

[0015] In some embodiments, the outer side surface of the positioning and fixing block is a plane.

[0016] In some embodiments, the first sleeve and / or the second sleeve are both metal parts.

[0017] In some embodiments, the lifting mechanism includes a mounting frame, a motor, a first gear, a second gear, a screw rod, and a connecting plate;

[0018] The mounting frame includes a bottom plate, a top plate and a support plate, the bottom plate and the top plate are arranged in parallel and spaced apart, the support plate connects the bottom plate and the top plate, the motor is mounted on the lower surface of the top plate, the first gear and the second gear are mounted on one side of the upper surface of the top plate, and the first gear and the second gear are meshed with each other, the output end of the motor is fixedly connected to the first gear, the two ends of the screw rod are respectively mounted on the bottom plate and the top plate, and the upper end of the screw rod is penetrated through the top plate to be connected with the second gear;

[0019] The connecting plate is connected to the first sleeve, and a threaded portion connected to the screw rod is provided on the connecting plate.

[0020] In some embodiments, the lifting mechanism includes a guide rail, the guide rail is mounted on the support plate, and the guide rail is extended along the height direction of the support plate;

[0021] One end of the connecting plate is provided with a guide groove connected with the guide rail.

[0022] In some embodiments, the bottom plate is provided with a first bearing sleeved on the lower end of the screw rod, and the top plate is provided with a second bearing sleeved on the upper end of the screw rod.

[0023] The utility model also discloses a device for cleaning screw holes of flanges of pressure vessels in nuclear power plants, comprising a frame and a positioning and drying device as described in any of the above embodiments and mounted on the frame.

[0024] The implementation of the utility model has the following beneficial effects: by using the positioning drying device, there is no need for workers to perform manual drying, which can better improve the drying efficiency of the flange screw holes of the pressure vessel in the nuclear power plant, and can prevent workers from being exposed to radiation during the drying operation, which can effectively protect the health and safety of the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

[0026] Figure 1 It is an application schematic diagram of a nuclear power plant pressure vessel flange screw hole cleaning device in some embodiments of the utility model;

[0027] Figure 2 It is one of the structural schematic diagrams of the positioning and drying device in some embodiments of the utility model;

[0028] Figure 3 This is the second structural schematic diagram of the positioning and drying device in some embodiments of the utility model;

[0029] Figure 4 It is a cross-sectional view of a positioning and drying device in some embodiments of the utility model. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] like Figure 1 As shown, the utility model shows a nuclear power plant pressure vessel flange screw hole cleaning device, including a frame 30 and a positioning drying device installed on the frame 30.

[0034] The carriage 30 can travel on the end surface of the nuclear power plant pressure vessel flange 100 to inspect and maintain the screw holes 101 of the nuclear power plant pressure vessel flange 100, such as cleaning, drying, polishing and the like.

[0035] See also Figures 1 to 4 The positioning and drying device includes a positioning and drying mechanism 10 and a lifting mechanism 20 connected to the positioning and drying mechanism 10 to drive the positioning and drying mechanism 10 to move in a height direction.

[0036] The positioning and drying mechanism 10 includes a first sleeve 11 , a second sleeve 12 , an air guide pipe 13 , a suction pipe 14 and an air delivery pipe 15 .

[0037] The first sleeve 11 and the second sleeve 12 are roughly cylindrical, and the volume of the first sleeve 11 is larger than that of the second sleeve 12. The second sleeve 12 is installed in the first sleeve 11, and the outer side surface of the second sleeve 12 and the inner side surface of the first sleeve 11 form an airflow space A, and the inner cavity of the second sleeve 12 forms a driving space B; the side wall of the first sleeve 11 is provided with a plurality of air guide holes 111, the air guide pipe 13 is connected to the first sleeve 11 and the air guide pipe 13 is connected to the airflow space A to introduce drying gas into the airflow space A, the air guide pipe 13 can be connected to a drying gas source, and the temperature of the drying gas can be greater than 50°C; the suction pipe 14 is penetrated by the first sleeve 11, and the suction port 141 of the suction pipe 14 is provided at the bottom of the first sleeve 11, and the other end of the suction pipe 14 can be connected to a vacuum generator or other exhaust equipment, which is used to form a circulation with the drying gas and take away the moisture in the screw hole 101.

[0038] Furthermore, the circumferential side wall of the first sleeve 11 is provided with a plurality of first through holes 112, and the circumferential side wall of the second sleeve 12 is provided with a plurality of second through holes 121. The first through holes 112 and the second through holes 121 are arranged opposite to each other to form a limiting channel. Each limiting channel is provided with a positioning and fixing block 16. The air supply pipe 15 is passed through the first sleeve 11 and connected to the second sleeve 12, and the air supply pipe 15 is connected to the driving space B. The air supply pipe 15 is used to supply or exhaust air to the driving space B. One end of the air supply pipe 15 can be connected to an air source to drive the positioning and fixing block 16 to be tensioned outward or contracted inward, so as to realize the positioning of the entire frame 30. In this embodiment, the positioning and fixing can be realized first, and then the drying operation can be started.

[0039] See also Figure 4 In some embodiments, the first sleeve 11 and the second sleeve 12 are coaxially arranged.

[0040] See also Figure 4 In some embodiments, the axial dimension of the second sleeve 12 is less than or equal to half of the axial dimension of the first sleeve 11. Of course, the dimensions of the first sleeve 11 and the second sleeve 12 can be selected and set according to actual needs, and are not specifically limited here.

[0041] See also Figure 4 In some embodiments, the air guide holes 111 are arranged at intervals along the axial direction and the circumferential direction of the first sleeve 11 .

[0042] See also Figure 4 In some embodiments, the air guide hole 111 is at least one of a round hole and an elongated hole. Of course, the shape and size of the air guide hole 111 can be selected and set according to actual needs, and are not specifically limited here.

[0043] See also Figure 4The suction pipe 14 is inserted through the first sleeve 11 and the second sleeve 12, or the suction pipe 14 is inserted through the first sleeve 11. The installation method of the suction pipe 14 can be selected and set according to actual needs, and is not specifically limited here.

[0044] In some embodiments, there are multiple positioning and fixing blocks 16 , and the multiple positioning and fixing blocks 16 are arranged at intervals along the circumference of the first sleeve 11 on the same plane.

[0045] Furthermore, the plurality of positioning and fixing blocks 16 constitute a positioning and fixing block group; and the number of the positioning and fixing block groups is at least two.

[0046] In some embodiments, the outer side surface of the positioning and fixing block 16 is a plane, and the outer side surface of the positioning and fixing block 16 here refers to the side surface that contacts the inner wall surface of the screw hole 101.

[0047] In some embodiments, the first sleeve 11 and / or the second sleeve 12 are both metal parts. For example, the first sleeve 11 and / or the second sleeve 12 can be made of stainless steel, such as 316L stainless steel.

[0048] See also Figures 2 to 3 In some embodiments, the lifting mechanism 20 includes a mounting frame 21, a motor 22, a first gear 23, a second gear 24, a screw rod 25, and a connecting plate 26.

[0049] The mounting frame 21 includes a bottom plate 211, a top plate 212 and a support plate 213. The bottom plate 211 and the top plate 212 are arranged in parallel and spaced apart. The support plate 213 connects the bottom plate 211 and the top plate 212. The motor 22 is installed on the lower surface of the top plate 212. The first gear 23 and the second gear 24 are installed on one side of the upper surface of the top plate 212, and the first gear 23 and the second gear 24 are meshed with each other. The output end of the motor 22 is fixedly connected to the first gear 23. The two ends of the screw rod 25 are respectively installed on the bottom plate 211 and the top plate 212, and the upper end of the screw rod 25 is penetrated through the top plate 212 to be connected with the second gear 24.

[0050] The connecting plate 26 is connected to the first sleeve 11, and a threaded portion 261 connected to the screw rod 25 is provided on the connecting plate 26. The connecting plate 26 can be connected to the top of the first sleeve 11.

[0051] The motor 22 drives the first gear 23 to rotate, the first gear 23 drives the second gear 24 to rotate, the second gear 24 drives the screw rod 25 to transmit, and then the screw rod 25 drives the connecting plate 26 to move back and forth along the height direction, and then the positioning drying mechanism 10 moves back and forth along the height direction. The motor 22 can be a servo motor, which has forward and reverse functions and high driving accuracy.

[0052] Furthermore, the lifting mechanism 20 includes a guide rail 27, which is mounted on the support plate 213 and extends along the height direction of the support plate 213. A guide groove 262 connected to the guide rail 27 is provided at one end of the connecting plate 26.

[0053] Furthermore, the bottom plate 211 is provided with a first bearing 28 sleeved on the lower end of the screw rod 25, and the top plate 212 is provided with a second bearing 29 sleeved on the upper end of the screw rod 25, so that the transmission of the screw rod 25 is smoother.

[0054] It can be understood that the application of this positioning and drying device eliminates the need for manual drying by workers, which can better improve the drying efficiency of the flange screw holes of the pressure vessel of the nuclear power plant, and can prevent workers from being exposed to radiation during the drying operation, thereby effectively protecting the health and safety of workers.

[0055] 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 positioning drying device, characterized in that: It comprises a positioning and drying mechanism (10) and a lifting mechanism (20) connected to the positioning and drying mechanism (10) to drive the positioning and drying mechanism (10) to move in a height direction; The positioning and drying mechanism (10) comprises a first sleeve (11), a second sleeve (12), an air guide pipe (13), a suction pipe (14) and an air delivery pipe (15); the second sleeve (12) is installed in the first sleeve (11), and the outer side surface of the second sleeve (12) and the inner side surface of the first sleeve (11) form an air flow space (A); the inner cavity of the second sleeve (12) forms a driving space (B); the side wall of the first sleeve (11) is provided with a plurality of air guide holes (111), the air guide pipe (13) is connected to the first sleeve (11), and the air guide pipe (13) is connected to the air flow space (A) so as to introduce drying gas into the air flow space (A); the suction pipe (14) is inserted into the first sleeve (11), and the suction port (141) of the suction pipe (14) is provided at the bottom of the first sleeve (11); The circumferential side wall of the first sleeve (11) is provided with a plurality of first through holes (112), and the circumferential side wall of the second sleeve (12) is provided with a plurality of second through holes (121). The first through holes (112) and the second through holes (121) are arranged opposite to each other to form a limiting channel. Each limiting channel is provided with a positioning and fixing block (16). The air supply pipe (15) is passed through the first sleeve (11) and connected to the second sleeve (12). The air supply pipe (15) is connected to the driving space (B). The air supply pipe (15) is used to supply air or exhaust air to the driving space (B) to drive the positioning and fixing block (16) to be stretched outward or contracted inward.

2. The positioning and drying device according to claim 1, characterized in that: The first sleeve (11) and the second sleeve (12) are coaxially arranged.

3. The positioning and drying device according to claim 1, characterized in that: The axial dimension of the second sleeve (12) is less than or equal to one half of the axial dimension of the first sleeve (11).

4. The positioning and drying device according to claim 1, characterized in that: The air guide holes (111) are arranged at intervals along the axial direction and the circumferential direction of the first sleeve (11).

5. The positioning and drying device according to claim 1, characterized in that: The air guide hole (111) is at least one of a round hole and an elongated hole.

6. The positioning and drying device according to claim 1, characterized in that: The suction pipe (14) is inserted through the first sleeve (11) and the second sleeve (12).

7. The positioning and drying device according to claim 1, characterized in that: There are a plurality of positioning and fixing blocks (16), and the plurality of positioning and fixing blocks (16) are arranged at intervals along the circumference of the first sleeve (11) on the same plane.

8. The positioning and drying device according to claim 1, characterized in that: A plurality of the positioning and fixing blocks (16) form a positioning and fixing block group; The number of the positioning and fixing block groups is at least two.

9. The positioning and drying device according to claim 1, characterized in that: The outer side surface of the positioning and fixing block (16) is a plane.

10. The positioning and drying device according to claim 1, characterized in that: The first sleeve (11) and / or the second sleeve (12) are both metal parts.

11. The positioning and drying device according to claim 1, characterized in that: The lifting mechanism (20) comprises a mounting frame (21), a motor (22), a first gear (23), a second gear (24), a screw rod (25), and a connecting plate (26); The mounting frame (21) comprises a bottom plate (211), a top plate (212) and a support plate (213); the bottom plate (211) and the top plate (212) are arranged in parallel and spaced apart; the support plate (213) connects the bottom plate (211) and the top plate (212); the motor (22) is mounted on the lower surface of the top plate (212); the first gear (23) and the second gear (24) are mounted on one side of the upper surface of the top plate (212); the first gear (23) and the second gear (24) are meshed with each other; the output end of the motor (22) is fixedly connected to the first gear (23); the two ends of the screw rod (25) are respectively mounted on the bottom plate (211) and the top plate (212); and the upper end of the screw rod (25) is passed through the top plate (212) to be connected to the second gear (24); The connecting plate (26) is connected to the first sleeve (11), and a threaded portion (261) connected to the screw rod (25) is provided on the connecting plate (26).

12. The positioning and drying device according to claim 11, characterized in that: The lifting mechanism (20) comprises a guide rail (27), the guide rail (27) is installed on the support plate (213), and the guide rail (27) is extended along the height direction of the support plate (213); One end of the connecting plate (26) is provided with a guide groove (262) connected to the guide rail (27).

13. The positioning and drying device according to claim 11, characterized in that: The bottom plate (211) is provided with a first bearing (28) sleeved on the lower end of the screw rod (25), and the top plate (212) is provided with a second bearing (29) sleeved on the upper end of the screw rod (25).

14. A nuclear power plant pressure vessel flange screw hole cleaning device, characterized in that: It comprises a frame, and a positioning and drying device as claimed in any one of claims 1 to 13 installed on the frame.

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