Nuclear power fastener with unscrewing device

Abstract

The utility model belongs to the technical field of nuclear power fasteners, and particularly relates to a nuclear power fastener with an unscrewing device, which comprises a fixed base, a fixed part arranged above the fixed base, and a plurality of groups of fastening bolts which are in threaded connection with the joint of the fixed base and the fixed part and are arranged in an annular array, according to the fastening bolt unscrewing device, through the arranged unscrewing assembly, unscrewing operation of a fastening bolt can be automatically completed, manual intervention is not needed in the whole process, the reliability and stability of the whole unscrewing operation are greatly improved, and the unscrewing efficiency is improved. The problems of bolt damage, thread slipping and the like caused by non-uniform or unstable manual force application are avoided, the quality and safety of nuclear power equipment maintenance operation are improved, an operator can perform remote control or monitoring in a safety area far away from radiation and high temperature, life health and safety of the operator are practically guaranteed, and the working efficiency is improved. And casualties and long-term health hidden dangers caused by occupational injuries are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nuclear power fastener technical field, concretely relates to a nuclear power fastener with loosening device. BACKGROUND

[0002] In the nuclear power field, the normal operation and regular maintenance of nuclear reactors and related equipment play a crucial role in the safety and stability of the entire nuclear power system. Among them, the fasteners used extensively on nuclear power equipment need to be loosened and tightened during installation, maintenance, and component replacement operations;

[0003] Traditional nuclear power fastener loosening operations are mainly completed manually by human labor. However, the nuclear power working environment is extremely special, with high-intensity radiation and high-temperature extreme danger factors. When manually loosening the bolts, the operators must be in close contact with these dangerous sources, and long-term exposure to the radiation environment can cause radiation damage, greatly increasing the risk of serious diseases such as cancer. At the same time, the high-temperature environment can easily cause the operators to suffer from heatstroke, burns, and other heat injuries, not only causing immediate pain and damage to the operators' bodies, but also making it difficult to ensure the uniformity and stability of the manual loosening operation. In the process of loosening the bolts, it is easy to cause uneven or unstable force, which may cause the bolts to be subjected to abnormal stress, and further cause problems such as bolt damage and thread slippage.

[0004] To solve the above problems, the present application proposes a nuclear power fastener with a loosening device. INVENTION CONTENTS

[0005] To solve the problems raised in the background art, the present application provides a nuclear power fastener with a loosening device, which automatically completes the loosening operation of the fastening bolts, does not require manual intervention throughout the process, and effectively ensures the life and health safety of the operators and improves the quality of nuclear power equipment maintenance operations.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a nuclear power fastener with a loosening device, comprising a fixed base, a fixed part arranged above the fixed base, and a plurality of groups of fastening bolts arranged in a ring array at the connection between the fixed base and the fixed part, further comprising a loosening assembly arranged above the fixed base, the loosening assembly comprising a fixed frame arranged above the base, a loosening motor and a driving gear for loosening the fastening bolts, a driven gear, a spline shaft, and a loosening bolt sleeve connected to the inside of the fixed frame by screws;

[0007] Further comprising a rotating assembly installed on the surface of the fixing member, the rotating assembly comprising a rotating frame fixed on the surface of the fixing member, a rotating gear ring and a rotating gear for adjusting the position of the loosening bolt sleeve, a support frame and a rotating motor rotatably connected on the surface of the rotating frame.

[0008] Preferably, the output end of the loosening motor is fixed with a driving gear, the surface of the driving gear is meshingly connected with a driven gear, the driven gear is rotatably connected in the interior of the fixed frame through a bearing, the interior of the driven gear is spline-connected with a spline shaft, the spline shaft is slidably connected in a moving slot formed in the interior of the fixed frame, and the bottom end of the spline shaft is fixed with the loosening bolt sleeve.

[0009] Preferably, the interior of the loosening bolt sleeve is fixed with a press switch, the press end of the press switch is fixed with a spring, the bottom end of the spring is fixed with a pressure plate, and the interior of the pressure plate is fixed with a plurality of groups of position sensors arranged in a ring array.

[0010] Preferably, the surface of the spline shaft is rotatably connected with a lifting plate, the lifting plate is slidably connected in a lifting slot formed in the interior of the fixed frame, and the lifting plate and the fixed frame are fixed with an electric telescopic rod.

[0011] Preferably, the surface of the rotating gear ring is meshingly connected with a rotating gear, the surface of the rotating frame is fixed with a support frame, and the surface of the support frame is screw-connected with a rotating motor.

[0012] Preferably, the interior of the rotating gear is fixed with a transmission shaft, the transmission shaft is rotatably connected in the interior of the support frame, the output end of the rotating motor is fixed with a bevel gear pair, and the bevel gear of the bevel gear pair is coaxially fixed with the transmission shaft.

[0013] Preferably, the bottom side surface of the rotating gear ring is fixed with a rotating frame, and the rotating frame and the fixed frame are fixedly connected.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] 1、Through the setting of the loosening assembly, the loosening operation of the fastening bolt can be automatically completed, and manual intervention is not required throughout, which not only greatly improves the reliability and stability of the whole loosening operation, avoids problems such as bolt damage, thread slippage and the like caused by uneven or unstable manual force, but also improves the quality and safety of nuclear power equipment maintenance operation, so that the operator can perform remote control or monitoring in a safe area away from radiation and high temperature, greatly reduces the risk of cell mutation, cancer and other diseases caused by radiation exposure, and the possibility of heat injury such as high-temperature scalding and heat stroke, and effectively protects the life and health safety of the operator, reduces personnel casualties and long-term health hazards caused by occupational injuries.

[0016] 2、Through the setting of the rotating assembly, the position of the loosening sleeve can be adjusted, so that the fastening bolts at different positions can be loosened, the working flexibility and comprehensiveness of the loosening device are improved, and the situation that the loosening sleeve and the fastening bolt cannot be accurately connected due to inaccurate positioning is effectively avoided, so that it is ensured that each loosening operation can accurately act on the corresponding fastening bolt, the accuracy of the loosening operation is greatly improved, the whole loosening device can cover all fastening bolts at different positions around the fixing member, and the situation that some bolts are not loosened will not occur, so that it is ensured that all bolts that need to be loosened on the whole nuclear power fastener can be operated, and the loosening task is completed comprehensively. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used together with embodiments of the present application to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic view of the whole present application;

[0019] Figure 2 It is a structural schematic view of the loosening assembly in the present application;

[0020] Figure 3 It is a sectional view of the loosening sleeve in the present application;

[0021] Figure 4 It is a sectional view of the pressure plate in the present application;

[0022] Figure 5 It is a structural schematic view of the fixing member and the rotating assembly in the present application.

[0023] In the figure: 1, fixed base; 2, fixed part; 3, fastening bolt; 4, loosening assembly; 41, fixed frame; 42, loosening motor; 43, driving gear; 44, driven gear; 45, spline shaft; 46, loosening bolt sleeve; 47, press switch; 48, spring; 49, pressure plate; 410, position sensor; 411, pull plate; 412, electric telescopic rod; 5, rotating assembly; 51, rotating frame; 52, rotating gear ring; 53, rotating gear; 54, transmission shaft; 55, support frame; 56, rotating motor; 57, bevel gear pair; 58, rotating frame. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] As shown in the figure: Figure 1

[0026] A nuclear power fastener with loosening device comprises a fixed base 1 and a fixed part 2 and a plurality of fastening bolts 3 arranged in a ring array at the connection between the fixed base 1 and the fixed part 2.

[0027] As shown in the figure: Figures 1-5

[0028] In combination with the above, in order to automatically complete the loosening operation of the fastening bolts 3, a loosening assembly 4 is arranged above the fixed base 1, which comprises a fixed frame 41, a loosening motor 42, a driving gear 43, a driven gear 44, a spline shaft 45, a loosening bolt sleeve 46, a press switch 47, a spring 48, a pressure plate 49, a position sensor 410, a pull plate 411 and an electric telescopic rod 412.

[0029] ​​The upper portion of the fixed base 1 is provided with a fixing frame 41, a loosening motor 42 is screw connected in the inside of the fixing frame 41, a driving gear 43 is fixed to the output end of the loosening motor 42, a driven gear 44 is meshing connected on the surface of the driving gear 43, the driven gear 44 is rotatably connected in the inside of the fixing frame 41 through a bearing, a spline shaft 45 is spline connected in the inside of the driven gear 44, the spline shaft 45 is slidingly connected in the moving groove in the inside of the fixing frame 41, a loosening bolt sleeve 46 is fixed to the bottom end of the spline shaft 45, a press switch 47 is fixed in the inside of the loosening bolt sleeve 46, a spring 48 is fixed to the press end of the press switch 47, a pressure plate 49 is fixed to the bottom end of the spring 48, a plurality of groups of position sensors 410 in annular array are fixed in the inside of the pressure plate 49, a lifting plate 411 is rotatably connected on the surface of the spline shaft 45, the lifting plate 411 is slidingly connected in the lifting groove in the inside of the fixing frame 41, and a motor telescopic rod 412 is fixed between the lifting plate 411 and the fixing frame 41.

[0030] In combination with the above, in order to loosen the fastening bolt 3 at different positions, a rotating assembly 5 is installed on the surface of the fixing part 2, the rotating assembly 5 includes a rotating frame 51, a rotating gear ring 52, a rotating gear 53, a transmission shaft 54, a support frame 55, a rotating motor 56, a bevel gear pair 57 and a rotating frame 58.

[0031] The surface of the fixing part 2 is fixed with the rotating frame 51, the surface of the rotating frame 51 is rotatably connected with the rotating gear ring 52, the surface of the rotating gear ring 52 is meshing connected with the rotating gear 53, the inside of the rotating gear 53 is fixed with the transmission shaft 54, the surface of the rotating frame 51 is fixed with the support frame 55, and the transmission shaft 54 is rotatably connected in the inside of the support frame 55, the surface of the support frame 55 is screw connected with the rotating motor 56, the output end of the rotating motor 56 is fixed with the bevel gear pair 57, and the bevel gears of the bevel gear pair 57 are coaxially fixed with the transmission shaft 54, the bottom side surface of the rotating gear ring 52 is fixed with the rotating frame 58, and the rotating frame 58 is fixedly connected with the fixing frame 41.

[0032] The working principle and use process of the utility model: when need to unscrew fastening bolt 3, first start rotating motor 56, drive bevel gear pair 57 to rotate by rotating motor 56, and then drive transmission shaft 54 to rotate in the inside of support frame 55, to drive rotary gear 53 to rotate in turn, rotary gear 53 is connected with rotary gear ring 52, the rotation of rotary gear 53 will make rotary gear ring 52 rotate on rotating frame 51, can drive rotating frame 58 synchronous rotation, through the rotation of rotating frame 58, can drive fixed frame 41 and unscrew bolt sleeve 46 whole surface rotation of fixed part 2 a certain angle, during position sensor 410 will detect the position of fastening bolt 3, once position sensor 410 detects that unscrew bolt sleeve 46 reaches the position of fastening bolt 3, rotating motor 56 will immediately close, to make unscrew bolt sleeve 46 hover in the position above fastening bolt 3, to facilitate the unscrewing operation of fastening bolt 3 in different positions, improve the working flexibility and comprehensiveness of the unscrewing device, effectively avoid the situation that unscrew bolt sleeve 46 and fastening bolt 3 cannot accurately butt joint due to inaccurate positioning, to ensure that every time unscrewing operation can accurately act on corresponding fastening bolt 3, greatly improve the accuracy of unscrewing operation, make the whole unscrewing device can cover all fastening bolt 3 in different positions around fixed part 2, will not appear some bolts are not unscrewed, ensure that all bolts that need to be unscrewed on the whole nuclear power fastener can be operated, complete the unscrewing task comprehensively.

[0033] Further, when the rotating motor 56 is turned off, the electric telescopic rod 412 will automatically start, thereby pulling the pull plate 411 to slide downward along the pull slot inside the fixed frame 41, so as to drive the spline shaft 45 to move downward inside the fixed frame 41, and drive the loosening bolt sleeve 46 to move downward synchronously to approach the surface of the fastening bolt 3. With the continuous downward movement of the loosening bolt sleeve 46, when the loosening bolt sleeve 46 contacts the fastening bolt 3, the pressure plate 49 will be extruded by the head of the fastening bolt 3, thereby compressing the spring 48 to extrude and press the press switch 47 and trigger. When the press switch 47 is triggered by the pressure, it indicates that the loosening bolt sleeve 46 has been completely sleeved on the fastening bolt 3 and tightly clamped on the fastening bolt 3. Then, the electric telescopic rod 412 is immediately controlled to stop working, and the loosening motor 42 is started. The output end of the loosening motor 42 drives the driving gear 43 to rotate, thereby driving the driven gear 44 to rotate inside the fixed frame 41. Since the driven gear 44 is in spline connection with the spline shaft 45, the rotation of the driven gear 44 will drive the spline shaft 45 to rotate synchronously, thereby driving the loosening bolt sleeve 46 sleeved on the fastening bolt 3 to rotate synchronously. With the continuous rotation of the loosening motor 42, the loosening bolt sleeve 46 drives the fastening bolt 3 to loosen, that is, the loosening operation of the fastening bolt 3 is automatically completed. The whole process does not need manual intervention, which not only greatly improves the reliability and stability of the loosening operation, avoids problems such as bolt damage, thread galling caused by uneven or unstable manual force, but also improves the quality and safety of nuclear power equipment maintenance operation, so that the operator can remotely control or monitor in a safe area away from radiation and high temperature, greatly reducing the risk of cell mutation, cancer and other diseases caused by radiation exposure, and the possibility of heat injury such as high temperature scald and heat stroke, thereby effectively protecting the life and health safety of the operator, reducing personnel casualties and long-term health hazards caused by occupational injuries.

[0034] It is worth noting that after the loosening operation of one fastening bolt 3 is completed, the electric telescopic rod 412 is controlled to reset, and then the rotating motor 56 is started again to drive the loosening bolt sleeve 46 and the position sensor 410 to rotate. When the position sensor 410 detects the position of the subsequent fastening bolt 3 again, the above operation can be repeated for loosening operation without manual intervention for switching operation. This efficient and smooth operation mode significantly shortens the loosening time of the fastening bolt 3, especially when a large number of fastening bolts 3 need to be loosened, which can greatly improve the overall work efficiency.

[0035] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A nuclear fastener with a loosening device, comprising a fixed base (1) and a fixed part (2) arranged above the fixed base (1) and a number of sets of fastening bolts (3) threaded at the connection of the fixed base (1) and the fixed part (2) in a ring array, characterized in that: The loosening assembly (4) is arranged above the fixed base (1), and comprises a fixing frame (41) arranged above the fixed base (1), a loosening motor (42) and a driving gear (43) for loosening the fastening bolt (3) which are screw-connected in the fixing frame (41), a driven gear (44), a spline shaft (45) and a loosening bolt sleeve (46); The rotating assembly (5) is arranged on the surface of the fixing part (2), and comprises a rotating frame (51) fixed on the surface of the fixing part (2), a rotating gear ring (52) rotatably connected to the surface of the rotating frame (51), and a rotating gear (53), a support frame (55) and a rotating motor (56) for adjusting the position of the loosening bolt sleeve (46).

2. The nuclear fastener with a spin-out device of claim 1, wherein: The output end of the loosening motor (42) is fixedly connected with the driving gear (43), the surface of the driving gear (43) is engagedly connected with the driven gear (44), the driven gear (44) is rotatably connected in the fixing frame (41) through a bearing, the inside of the driven gear (44) is spline-connected with the spline shaft (45), the spline shaft (45) is slidably connected in the moving groove in the fixing frame (41), and the bottom end of the spline shaft (45) is fixedly connected with the loosening bolt sleeve (46).

3. The nuclear fastener with a spin-out device of claim 1, wherein: The inside of the loosening bolt sleeve (46) is fixedly connected with the pressing switch (47), the pressing end of the pressing switch (47) is fixedly connected with the spring (48), the bottom end of the spring (48) is fixedly connected with the pressure plate (49), and the inside of the pressure plate (49) is fixedly connected with a plurality of groups of position sensors (410) arranged in a ring array.

4. The nuclear fastener with a spin-out device of claim 1, wherein: The surface of the spline shaft (45) is rotatably connected with the lifting plate (411), the lifting plate (411) is slidably connected in the lifting groove in the fixing frame (41), and the electric telescopic rod (412) is fixed between the lifting plate (411) and the fixing frame (41).

5. The nuclear fastener with a spin-out device of claim 1, wherein: The surface of the rotating gear ring (52) is engagedly connected with the rotating gear (53), the surface of the rotating frame (51) is fixedly connected with the support frame (55), and the surface of the support frame (55) is screw-connected with the rotating motor (56).

6. The nuclear fastener with a spin-out device of claim 5, wherein: The inside of the rotating gear (53) is fixedly connected with the transmission shaft (54), and the transmission shaft (54) is rotatably connected in the support frame (55), the output end of the rotating motor (56) is fixedly connected with the bevel gear pair (57), and the bevel gear in the bevel gear pair (57) is fixedly connected with the transmission shaft (54) coaxially.

7. The nuclear fastener with a spin-out device of claim 1, wherein: The bottom side surface of the rotating gear ring (52) is fixedly connected with the rotating frame (58), and the rotating frame (58) and the fixing frame (41) are fixedly connected.

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