Extraction device and extraction system for irradiation monitoring pipe

Abstract

The utility model relates to an extraction device and an extraction system of an irradiation monitoring pipe, and the extraction device comprises a supporting platform, a cross rod which is arranged on the supporting platform and is horizontally arranged, a power assembly which is connected with the cross rod and is used for driving the cross rod to do longitudinal reciprocating displacement, and a grabbing assembly which is linked with the cross rod. The grabbing assembly comprises a cavity used for stretching into the irradiation monitoring pipe, a hollow fixed cylinder, and a push rod and a movable part which are movably arranged in the fixed cylinder. The fixed cylinder is fixed on the supporting platform; the push rod is connected with the cross rod and moves along with the cross rod, so that a part of the structure of the movable part is pushed out of the fixed cylinder when the push rod moves downwards, the fixed cylinder is clamped in the cavity, the thrust action on the movable part is cancelled when the push rod moves upwards, and the fixed cylinder can retreat from the cavity. According to the extraction device, the irradiation monitoring pipe can be grabbed even in a place where the axial space of the irradiation monitoring pipe is narrow.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power overhauls and refueling operation technical field, especially a kind of extraction device and extraction system of irradiation supervision pipe. BACKGROUND

[0002] A certain number of irradiation supervision pipes are arranged inside reactor pressure vessel, by periodically refueling or overhauls to the irradiation supervision pipe extraction, analysis and test the mechanical sample performance in irradiation supervision pipe, then the material performance level of reactor pressure vessel after irradiation can be determined, to provide data for the mechanical analysis and safety analysis of in-service reactor pressure vessel.

[0003] The traditional extraction mode is to extract the irradiation supervision pipe from above by long rod tool. However, in some compactly arranged pressurized water reactors, the upper part of the irradiation supervision pipe is blocked by other equipment, so that the axial extraction space is narrow, and the traditional extraction mode cannot be used. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is that the traditional extraction mode is too strict for the axial space of irradiation supervision pipe, and based on this, an extraction device and extraction system of irradiation supervision pipe are provided.

[0005] The technical scheme adopted by the utility model to solve its technical problem is to construct an extraction device of irradiation supervision pipe, which comprises a supporting platform, a horizontal crossbar arranged on the supporting platform, a power assembly connected with the crossbar for driving the crossbar to move, and a grabbing assembly linked with the crossbar.

[0006] The grabbing assembly comprises a hollow fixing cylinder, a push rod and a movable piece movably arranged in the fixing cylinder.

[0007] The fixing cylinder is fixed at the supporting platform; the crossbar is connected with the push rod and drives the push rod to make longitudinal reciprocating displacement, so as to push a part of the movable piece out of the fixing cylinder when the push rod moves downward, make the fixing cylinder clamped in the cavity, and cancel the pushing force on the movable piece when the push rod moves upward, to provide a basis for the fixing cylinder to exit from the cavity.

[0008] In some embodiments, when the fixing cylinder is clamped in the cavity, the bottom of the crossbar is in contact with the supporting platform.

[0009] In some embodiments, the extraction device comprises a box body, and the supporting platform is arranged on the box body and extends outward along the horizontal side of the box body.

[0010] In some embodiments, the top end of the fixed cylinder is mounted at the end of the supporting platform away from the box, and the bottom end of the fixed cylinder extends longitudinally downward.

[0011] In some embodiments, the push rod is at least partially arranged in the fixed cylinder.

[0012] The push rod is arranged in the fixed cylinder, including a thick rod part with a larger diameter and a thin rod part with a smaller diameter, and the thick rod part is arranged above the thin rod part.

[0013] When the push rod moves downward, the thick rod part moves to a position opposite to the movable part in the radial direction of the fixed cylinder, and pushes a part of the movable part out of the fixed cylinder.

[0014] When the push rod moves upward, the thin rod part moves to a position opposite to the movable part in the radial direction of the fixed cylinder, and leaves a space for the movable part to retract.

[0015] In some embodiments, the circumferential outer wall of the fixed cylinder is provided with a mounting hole penetrating in the radial direction, and the hole diameter of the mounting hole decreases from the inward end to the outward end.

[0016] The movable part includes a ball, the ball is mounted in the mounting hole, and the diameter of the ball is between the hole diameter of the inward end of the mounting hole and the hole diameter of the outward end of the mounting hole.

[0017] In some embodiments, the power assembly includes a gas supply device, a cylinder, and an intake pipe and an exhaust pipe connecting the gas supply device and the cylinder; the cylinder is provided with a piston rod connected with the cross rod, and the intake and exhaust of the cylinder drives the reciprocating displacement of the cross rod in the longitudinal direction.

[0018] In some embodiments, a vacuum pressure switch for monitoring the gas pressure is arranged at the intake pipe to feedback the state of the grabbing assembly.

[0019] In some embodiments, a guide column longitudinally arranged is further arranged on the supporting platform, and the guide column is inserted into the cross rod to play a guiding role.

[0020] The utility model further constructs a kind of extraction system for irradiation supervision tube, including the extraction device described above, and mobile device;

[0021] The mobile device is connected with the extraction device, and drives the extraction device to move in longitudinal direction and horizontal direction.

[0022] The utility model discloses the following beneficial effects: the fixed cylinder of the present extraction device can extend into the chamber on the top of the irradiation supervision tube, under the driving of the power assembly, the push rod drives the horizontal rod to move downwards, pushes the part structure of the movable piece to the outside of the fixed cylinder, so that the movable piece can be clamped in the step position of the irradiation supervision tube, thereby clamping the irradiation supervision tube.

[0023] Since the present extraction device can be inserted into the chamber of the irradiation supervision tube from the horizontal side to realize grabbing, the requirement for the axial space of the irradiation supervision tube is greatly reduced, and even in the case of narrow axial space of the irradiation supervision tube, the irradiation supervision tube can also be grabbed. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0025] Figure 1 is the structure schematic diagram of the extraction device in some examples of the utility model in the clamping state;

[0026] Figure 2 is Figure 1 the enlarged schematic diagram of the structure framed by A frame in the figure.

[0027] Reference signs:

[0028] Extraction device 100;Box 1;Support platform 11;Guide column 12;Latch 13;Connection part 14;Horizontal rod 2;Gas supply equipment 31;Cylinder 32;Piston rod 321;Air inlet pipe 33;Air outlet pipe 34;Vacuum pressure switch 35;Grabbing assembly 4;Fixed cylinder 41;Mounting hole 411;Push rod 42;Coarse rod part 421;Thin rod part 422;Movable piece 43;

[0029] Irradiation supervision tube 200;Chamber 201;Step 202. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the present technical solution, and do not indicate that the indicated device or element must have a particular direction, so it cannot be understood as a limitation on the present application.

[0031] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like 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 indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Secondly, in the present application, the direction of the rotating core shaft of objects such as column, tube, rod and the like is defined as axial direction, the circumferential direction is the direction around the axis of the column, tube and the like (perpendicular to the axis and perpendicular to the cross-sectional radius), and the radial direction is the direction along the diameter or radius. It should be noted that no matter what "end" appears in the words "one end", "the other end", "first end", "second end", "initial end", "end", "two ends", "free end", "upper end", "lower end" and the like, it is not limited to the end, end point or end face, but also includes the part extending from the end, end point or end face on the element to which the end, end point or end face belongs. The above definition is only for the convenience of description, and cannot be understood as a limitation on the present application.

[0033] In the following description, for the purpose of explanation and not to limit, specific details are set forth, such as particular system structures, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it should be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0034] Before the extraction device 100 of the present application is described, the structure of the irradiation supervision tube 200 is introduced first. In the related art, reference can be made to Figure 1 The top of the irradiation supervision tube 200 is provided with an open chamber 201, and an annular step 202 is arranged on the inner wall of the chamber 201 (reference can be made to Figure 2 The extraction device 100 of the present application is designed according to the structure of the irradiation supervision tube 200.

[0035] In view of the problem that the traditional extraction method is too strict in the axial space requirement of the irradiation supervision tube 200, reference can be made to Figure 1 The present application constructs an extraction device 100 for the irradiation supervision tube 200, which mainly comprises a supporting platform 11, a horizontal crossbar 2 arranged on the supporting platform 11, a power assembly connected with the crossbar 2 and used for driving the crossbar 2 to make longitudinal reciprocating displacement on the supporting platform 11, and a grabbing assembly 4 linked with the crossbar 2.

[0036] As shown in Figure 1 The grabbing assembly 4 can include a hollow fixing cylinder 41, and a push rod 42 and a movable piece 43 movably arranged in the fixing cylinder 41; the fixing cylinder 41 is fixed at the supporting platform 11; the crossbar 2 is connected with the push rod 42 and drives the push rod 42 to make longitudinal reciprocating displacement, so as to push a part of the structure of the movable piece 43 out of the fixing cylinder 41 when the push rod 42 moves downward, to make the fixing cylinder 41 clamped in the chamber 201, and to cancel the pushing force on the movable piece 43 when the push rod 42 moves upward, to provide a basis for the fixing cylinder 41 to exit from the chamber 201.

[0037] In other words, the push rod 42 has an upper position and a lower position, and can reciprocate between the upper position and the lower position; at the lower position, the push rod 42 pushes a part of the structure of the movable piece 43 out of the fixing cylinder 41, so that the movable piece 43 is in an extended state; and at the upper position, the pushing force of the push rod 42 on the movable piece 43 is cancelled, and at this time the movable piece 43 can return from the extended state to the original state under the action of the side wall of the chamber 201 or gravity or a reset piece.

[0038] It can be understood that when the push rod 42 is located at the upper position, the fixed barrel 41 can freely enter and exit the chamber 201 at the top of the irradiation supervision tube 200. When the fixed barrel 41 enters the chamber 201 at the top of the irradiation supervision tube 200, under the driving action of the power assembly, the push rod 42 drives the horizontal rod 2 to move from the upper position to the lower position, and pushes a part of the structure of the movable piece 43 out of the fixed barrel 41, so that the movable piece 43 can be clamped at the step 202 position of the irradiation supervision tube 200, thereby clamping the irradiation supervision tube 200. Then, by moving the entire supporting platform 11, the irradiation supervision tube 200 can be extracted and moved to a suitable position. After the movement of the irradiation supervision tube 200 is completed, under the driving of the power assembly again, the push rod 42 drives the horizontal rod 2 to return to the upper position from the lower position, at this time the push rod 42 cancels the pushing force on the movable piece 43, and a part of the structure of the movable piece 43 can return to the fixed barrel 41, and the fixed barrel 41 can exit from the chamber 201 at the top of the irradiation supervision tube 200.

[0039] Therefore, the push rod 42 arranged horizontally is inserted into the chamber 201 of the irradiation supervision tube 200 from the horizontal side of the irradiation supervision tube 200 to realize grabbing, which greatly reduces the requirement for the axial space of the irradiation supervision tube 200. Even in a narrow axial space of the irradiation supervision tube 200, the irradiation supervision tube 200 can be grabbed.

[0040] In addition, it should be noted that the movable piece 43 extends a part of the structure in the extended state, and it is not limited that the movable piece 43 is completely accommodated in the fixed barrel 41 in the original state. As long as the movable piece 43 does not affect the entry and exit of the fixed barrel 41 into the chamber 201 of the irradiation supervision tube 200 in the original state, a small part of the structure can also be extended in the original state.

[0041] The specific structure of the extraction device 100 in some embodiments will be described below.

[0042] In some embodiments, referring to Figure 1 , the extraction device 100 can include a box body 1, and the supporting platform 11 is arranged on the box body 1 and extends outward along the horizontal side of the box body 1.

[0043] The horizontal rod 2 is arranged at the top of the supporting platform 11. The horizontal rod 2 can be surrounded by the side wall arranged around the horizontal four sides of the supporting platform 11, so as to protect the horizontal rod 2.

[0044] The horizontal rod 2 can be a long strip structure, one end of which is used for fixed connection with one end of the push rod 42 to drive the push rod 42 to move, and the other end of the horizontal rod 2 can be connected with the guide column 12 standing on the supporting platform 11. The guide column 12 can play a guiding role to ensure that the horizontal rod 2 can move along the longitudinal direction.

[0045] The fixed cylinder 41 can be installed at the end of the support platform 11 away from the box 1, wherein the top end of the fixed cylinder 41 can be fixed vertically on the support platform 11, and the bottom end is a free end, extending longitudinally downward.

[0046] The push rod 42 can be coaxially arranged in the fixed cylinder 41, and at least part of the structure of the push rod 42 is located in the fixed cylinder 41. Secondly, the top end of the push rod 42 can protrude out of the fixed cylinder 41 and be inserted into the crossbar 2, and the top end of the push rod 42 can be fixed on the crossbar 2 by the latch 13.

[0047] Please refer to Figure 2 , the structure of the push rod 42 in the fixed cylinder 41 can include a large-diameter thick rod part 421 and a small-diameter thin rod part 422, and the thick rod part 421 is located above the thin rod part 422. When the push rod 42 moves to the lower position, the thick rod part 421 moves to the position corresponding to the movable part 43, and the thick rod part 421 can push out the movable part 43, and when the push rod 42 moves to the upper position, the thin rod part 422 moves to the position corresponding to the movable part 43, and at this time the thin rod part 422 does not have the effect of pushing out the movable part 43, and the space for the retraction of the movable part 43 is released.

[0048] In the illustrated embodiment, the bottom end of the push rod 42 is a tapered head to form the thick rod part 421 and the thin rod part 422.

[0049] As Figure 2 shown, the movable part 43 can be a ball, such as a steel ball. The circumferential outer wall of the fixed cylinder 41 is provided with a radially penetrating mounting hole 411, the hole diameter of the mounting hole 411 decreases from the inward end to the outward end, and the diameter of the steel ball can be between the hole diameter of the inward end of the mounting hole 411 and the hole diameter of the outward end of the mounting hole 411. In the illustrated embodiment, each mounting hole 411 can be a circular truncated cone-shaped through hole, and the fixed cylinder 41 is provided with a plurality of mounting holes 411, which are uniformly distributed circumferentially on the fixed cylinder 41.

[0050] The steel ball can be installed in the mounting hole 411 from the inner circumference of the fixed cylinder 41, and because of the existence of the push rod 42 and the hole diameter of the outward end of the mounting hole 411 is smaller than the diameter of the steel ball, the steel ball will not be separated from the mounting hole 411. When the push rod 42 moves from the upper position to the lower position, part of the structure of the steel ball can protrude from the mounting hole 411 and be clamped at the step 202 position of the irradiation supervision tube 200, thereby achieving clamping. At the same time, because the hole diameter of the inward end of the mounting hole 411 is larger than the hole diameter of the outward end, the hole wall of the mounting hole 411 is inclined from top to bottom, so when the push rod 42 returns to the upper position, the steel ball can automatically return to the mounting hole 411 under the action of gravity.

[0051] In other embodiments, the steel ball may also retract into the mounting hole 411 as the fixed cylinder 41 rises, pushed by the side wall of the chamber 201. Alternatively, the steel ball may be pulled back from the extended state to its original state by a spring or other reset element.

[0052] Can be reviewed Figure 1 The power assembly may include an air supply device 31, a cylinder 32, and an air inlet pipe 33 and an air outlet pipe 34 connecting the air supply device 31 and the cylinder 32. The cylinder 32 is provided with a piston rod 321 connected to the crossbar 2. By the air inlet and outlet of the cylinder 32, the crossbar 2 can be driven to move back and forth longitudinally.

[0053] In the illustrated embodiment, the cylinder 32 can be fixed to the bottom of the support platform 11, and the piston rod 321 can pass through the support platform 11 and be fixedly connected to the bottom of the crossbar 2.

[0054] In some other embodiments, the power assembly may also include a motor, which drives the crossbar 2 to move via gears connected to the motor.

[0055] Furthermore, such as Figure 1 As shown, a connecting part 14 can be inserted into the crossbar 2 at the position corresponding to the piston rod 321, and the piston rod 321 can be fixedly connected to the crossbar 2 through the connecting part 14. For example, the connecting part 14 can be a bolt, and the piston rod 321 is fixedly connected to the bolt by screwing. Preferably, a pad can also be provided between the crossbar 2 and the support platform 11 to provide a buffering effect when the crossbar 2 descends.

[0056] In other embodiments, a connecting hole may be made at the position of the crossbar 2 corresponding to the piston rod 321, and one end of the piston rod 321 may be inserted and connected to the connecting hole by means of snap-fit, screw connection or other fixed connection.

[0057] Optionally, such as Figure 1 As shown, a vacuum pressure switch 35 can be installed at the air intake pipe 33 to provide feedback on the status of the gripping component 4. For example, when the pressure inside the air intake pipe 33 is relatively high, it can be determined that the gripping component 4 is in a clamping state, while when the pressure inside the air intake pipe 33 is relatively low (because the piston retracts), it can be determined that the gripping component 4 is in a released state.

[0058] In summary, the specific working process of this extraction device 100 can be simply understood as follows: when the pressure of cylinder 32 is low, piston rod 321 retracts (descends), push rod 42 descends, steel ball extends, and gripping component 4 clamps; when the pressure of cylinder 32 is high, piston rod 321 extends (ascends), push rod 42 rises, steel ball retracts, and gripping component 4 releases.

[0059] When the gripping assembly 4 is clamped, the bottom of the crossbar 2 can be attached to the supporting platform 11, and then the box 1 is lifted by remote control, the irradiation supervision tube 200 can be extracted and lifted.

[0060] Moreover, when an emergency situation such as interruption of air supply occurs, the crossbar 2 can still remain in the original position by the lifting force of the box 1, and since the steel ball is not retracted, the gripping assembly 4 can still firmly clamp the irradiation supervision tube 200, so the extraction device 100 also has a self-locking function, which can prevent the irradiation supervision tube 200 from accidentally falling off.

[0061] In addition, the extraction device 100 has a simple structure, and the axial size of the gripping assembly 4 is small, so the irradiation supervision tube 200 can be extracted even in a narrow axial space.

[0062] In addition, the utility model also constructs a kind of extraction system for irradiation supervision tube 200, it can include the above-mentioned extraction device 100, and mobile device;The mobile device is connected with extraction device 100, and is used to drive extraction device 100 moves in longitudinal direction and horizontally. In other words, after the extraction device 100 clamps the irradiation supervision tube 200, the irradiation supervision tube 200 can be lifted and translated by the mobile device.

[0063] The specific structure of the mobile device can refer to related technologies, which will not be repeated here.

[0064] It can be understood that the above embodiments only express the preferred embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent;It should be pointed out that for ordinary skilled person in the art, the above technical features can be freely combined without departing from the concept of the utility model, and some deformations and improvements can be made, which belong to the protection scope of the utility model;Therefore, any equivalent transformation and modification within the scope of the claims of the utility model should belong to the scope of the claims of the utility model.

Claims

1. An extraction device for an irradiation monitoring tube, characterized in that The device comprises a supporting platform (11), a horizontal crossbar (2) arranged on the supporting platform (11), a power assembly connected with the crossbar (2) for driving the crossbar (2) to move, and a grabbing assembly (4) connected with the crossbar (2); The grabbing assembly (4) comprises a hollow fixing cylinder (41) for extending into the cavity of the irradiation supervision tube, and a push rod (42) and a movable element (43) movably arranged in the fixing cylinder (41); The fixing cylinder (41) is fixed on the supporting platform (11); The crossbar (2) is connected with the push rod (42) and drives the push rod (42) to move longitudinally and reciprocally, so that when the push rod (42) moves downward, a part of the movable element (43) is pushed out of the fixing cylinder (41) to make the fixing cylinder (41) clamped in the cavity, and when the push rod (42) moves upward, the pushing force on the movable element (43) is removed to provide a basis for the fixing cylinder (41) to exit from the cavity.

2. The extraction device of the irradiation oversight tube according to claim 1, characterized in that When the fixing cylinder (41) is clamped in the cavity, the bottom of the crossbar (2) is in contact with the supporting platform (11).

3. The extraction device of the irradiation oversight tube according to claim 1, characterized in that The extraction device comprises a box (1), and the supporting platform (11) is arranged on the horizontal side of the box (1) and extends outward.

4. The extraction device of the irradiation oversight tube according to claim 3, characterized in that The top end of the fixing cylinder (41) is installed on the end of the supporting platform (11) away from the box (1), and the bottom end of the fixing cylinder (41) extends longitudinally downward.

5. The extraction device of the irradiation supervision tube according to any one of claims 1 to 4, characterized in that At least part of the structure of the push rod (42) is located in the fixing cylinder (41); The structure of the push rod (42) in the fixing cylinder (41) comprises a thick rod part (421) with a larger diameter and a thin rod part (422) with a smaller diameter, and the thick rod part (421) is arranged above the thin rod part (422); When the push rod (42) moves downward, the thick rod part (421) moves to a position opposite to the movable element (43) in the radial direction of the fixing cylinder (41) and pushes a part of the movable element (43) out of the fixing cylinder (41); When the push rod (42) moves upward, the thin rod part (422) moves to a position opposite to the movable element (43) in the radial direction of the fixing cylinder (41) to provide space for the movable element (43) to retract.

6. The extraction device of the irradiation oversight tube according to claim 5, characterized in that The circumferential outer wall of the fixing cylinder (41) is provided with a mounting hole (411) penetrating in the radial direction, and the diameter of the mounting hole (411) decreases from the inward end to the outward end; The movable element (43) comprises a ball, and the ball is installed in the mounting hole (411), and the diameter of the ball is between the diameters of the inward end and the outward end of the mounting hole (411).

7. The extraction device of the irradiation monitor tube according to claim 1, characterized in that The power assembly comprises a gas supply device (31), a cylinder (32), and an air inlet pipe (33) and an air outlet pipe (34) connecting the gas supply device (31) and the cylinder (32); the cylinder (32) is provided with a piston rod (321) connected with the cross rod (2), and the cylinder (32) drives the cross rod (2) to reciprocate in the longitudinal direction through air inlet and outlet.

8. The extraction device of the irradiation oversight tube according to claim 7, characterized in that A vacuum pressure switch (35) for monitoring air pressure is arranged on the air inlet pipe (33) to feedback the state of the grabbing assembly (4).

9. The extraction device of the irradiation monitor tube according to claim 1, characterized in that A guide column (12) arranged in the longitudinal direction is further arranged on the supporting platform (11), and the guide column (12) is inserted into the cross rod (2) to play a guiding role.

10. An extraction system for an irradiation oversight tube, characterized by, The mobile device is connected with the extraction device and drives the extraction device to move in the longitudinal direction and the horizontal direction. The mobile device is connected with the extraction device and drives the extraction device to move in the longitudinal direction and the horizontal direction.

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