Automatic plug clamping device and pipe plugging device

Abstract

The present disclosure belongs to the technical field of nuclear power and particularly relates to a plug automatic clamping device and a pipe plugging device. The present disclosure can carry a certain number of plugs through the mutual cooperation between the support, the air cylinder, the pneumatic clamp, the plurality of clamping claws, the plurality of plugs and the storage pipe. After the installation of one plug, the plug can be automatically clamped in situ, so that the next pipe plugging operation can be carried out nearby, the lifting vehicle is prevented from repeatedly moving between the pipe plugging position and the manifold opening due to the replacement of the plug, and the pipe plugging operation efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power technology, specifically relating to an automatic plug clamping device and a plugging device. Background Technology

[0002] The steam generator (SG), serving as the pressure boundary between the primary and secondary loops of a nuclear power plant, is a core component for heat exchange between the primary loop's radioactive coolant and the secondary loop's non-radioactive feedwater. It also acts as a radioactive shield for the secondary loop, preventing contamination. Domestic and international experience in nuclear power plant operation shows that the degradation of heat transfer tubes cannot be completely eliminated. Therefore, in addition to regularly inspecting the integrity of the heat transfer tubes, it is necessary to perform rapid and reliable plugging operations on damaged or defective tubes to decommission them, thereby ensuring the safe and reliable operation of the SG.

[0003] Currently, for the plugging operation of heat transfer tubes in horizontal steam generators, after each plug is installed, the lifting vehicle needs to rise to the inlet of the manifold, manually install the plug onto the roller expansion robot, and then descend to the target position for the plug installation operation, which greatly reduces the plugging efficiency. Therefore, how to improve the efficiency of the plugging operation is an urgent problem to be solved. Summary of the Invention

[0004] To overcome the problems existing in related technologies, an automatic plug clamping device and a pipe plugging device are provided.

[0005] According to one aspect of the present disclosure, an automatic plug clamping device is provided, the automatic plug clamping device comprising: a bracket, a cylinder, a pneumatic clamp, multiple jaws, multiple plugs, and a storage tube;

[0006] The bracket includes a top plate and a bottom plate that are parallel to each other, and a support plate is vertically connected between the top plate and the bottom plate;

[0007] The cylinder is fixedly connected to the base plate, the pneumatic clamp is fixedly connected to the base plate, and the plurality of grippers are mounted on the drive end of the pneumatic clamp.

[0008] The lower end of the storage tube is fixedly connected to the top plate. The storage tube is used to accommodate a plurality of plugs arranged from top to bottom. The pneumatic clamp drives the plurality of jaws to grasp the bottommost plug among the plurality of plugs. The bottommost plug is located outside the storage tube.

[0009] When the bottommost plug is gripped by the plugging device, the pneumatic clamp is controlled to drive the multiple jaws to release the bottommost plug, and the cylinder is controlled to drive the pneumatic clamp to rise from the current first position to the second position. The pneumatic clamp is then controlled to drive the multiple jaws to grip the part of the bottommost plug that protrudes from the storage tube. Then, the cylinder is controlled to drive the pneumatic clamp to descend from the second position to the first position, and the previous plug and all the plugs above it move down together with the pneumatic clamp.

[0010] In one possible implementation, the automatic plug clamping device includes a guide rod;

[0011] The guide rod is connected between the top plate and the bottom plate, and the pneumatic clamp has a guide hole along the axial direction, through which the guide rod passes.

[0012] In one possible implementation, the automatic plug clamping device includes multiple guide rods.

[0013] According to another aspect of the present disclosure, a pipe-blocking device is provided, the pipe-blocking device comprising: a lifting vehicle, a telescopic module, a pipe-blocking assembly, and the aforementioned automatic plug clamping device;

[0014] The automatic plug clamping device is connected to the lifting vehicle via a bracket, the telescopic module is connected to the lifting vehicle, and the plugging assembly is connected to the drive end of the telescopic module.

[0015] The beneficial effects of this disclosure are as follows: In order to improve the efficiency of pipe plugging operations, an automatic plug clamping device is proposed. It is installed on the lifting vehicle of the positioning device and can carry a certain number of plugs. After a plug is installed, it can automatically clamp the plug on the spot so that the next pipe plugging operation can be carried out nearby. This reduces the number of times the lifting vehicle has to move back and forth between the pipe plugging position and the manifold opening due to plug replacement, thereby improving the efficiency of pipe plugging operations. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of an automatic plug clamping device according to an exemplary embodiment.

[0017] Figure 2 This is a top view of an automatic plug clamping device according to an exemplary embodiment.

[0018] Figure 3 This is a schematic diagram of a plug device according to an exemplary embodiment. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a cross-sectional view of an automatic plug clamping device according to an exemplary embodiment. Figure 2 This is a top view of an automatic plug clamping device according to an exemplary embodiment. Figure 1 and Figure 2 As shown, the automatic plug clamping device includes: a bracket, a cylinder 4, a pneumatic clamp 7, multiple jaws 5, multiple plugs 6, and a storage tube 10;

[0021] The bracket includes a top plate and a bottom plate that are parallel to each other, and a support plate is vertically connected between the top plate and the bottom plate;

[0022] The cylinder 4 is fixedly connected to the base plate, the pneumatic clamp 7 is fixedly connected to the base plate, and the plurality of grippers 5 are installed on the drive end of the pneumatic clamp 7.

[0023] The lower end of the storage tube 10 is fixedly connected to the top plate. The storage tube 10 is used to accommodate a plurality of plugs 6 arranged from top to bottom. The pneumatic clamp 7 drives the plurality of jaws 5 to grasp the bottommost plug 6 among the plurality of plugs 6. The bottommost plug 6 is located outside the storage tube 10.

[0024] When the bottommost plug 6 is gripped by the pipe-blocking device, the pneumatic clamp 7 is controlled to drive the multiple grippers 5 to release the bottommost plug 6, and the cylinder 4 is controlled to drive the pneumatic clamp 7 to rise from the current first position to the second position. The pneumatic clamp 7 is then controlled to drive the multiple grippers 5 to grip the part of the plug 6 above the bottommost plug 6 that protrudes from the storage tube 10. Then, the cylinder 4 is controlled to drive the pneumatic clamp 7 to descend from the second position to the first position. The previous plug 6 and all the plugs 6 above it move down together with the pneumatic clamp 7.

[0025] In one possible implementation, the automatic clamping device for the plug 6 includes a plurality of guide rods 3;

[0026] Each guide rod 3 is connected between the top plate and the bottom plate, and the pneumatic clamp 7 has multiple guide holes along the axial direction, with each guide rod 3 passing through one guide hole.

[0027] Figure 3 This is a schematic diagram illustrating a plug device according to an exemplary embodiment. (Refer to...) Figures 1 to 3 In one application example, the following operations can be performed.

[0028] Step 1: Control the lifting vehicle a to lift and lower the automatic plug clamping device b to the manifold inlet, and store a certain number of plugs 6 in the plug storage tube 10. Clamp the bottommost plug 6 in the gripper 5, and the pneumatic clamp 7 is in the clamping state; that is, the bottommost plug 6, the second to last plug 6, and the third to last plug 6; at this time, the bottommost plug 6 is clamped by the gripper 5, and the second to last plug 6 and the third to last plug 6 fall on the bottommost plug 6, as shown. Figure 2 As shown;

[0029] Step 2: Control the telescopic module c to carry the pipe-blocking assembly d to rise and drive the core rod to rotate, so that the core rod of the pipe-blocking assembly is screwed into the thread of the expansion block inside the bottom plug 6;

[0030] Step 3: Control the pneumatic clamp 7 to open, drive the gripper 5 to separate from the bottommost plug 6; extend the cylinder 4, drive the pneumatic clamp 7 to rise along the guide rod 3; then close the pneumatic clamp 7, drive the gripper 5 to clamp the second to last plug 6;

[0031] Step 4: Control the telescopic module c to carry the pipe-blocking component d down. The bottommost plug 6 descends to the bottom along with the core rod of the pipe-blocking component, ready to carry out the plug installation operation. At this time, the second to last plug 6 is clamped by the gripper 5, and the third to last plug 6 falls on the second to last plug 6.

[0032] Step 5: Control cylinder 4 to retract, drive pneumatic clamp 7 to descend along guide rod 3; the third-to-last plug 6 descends with the second-to-last plug 6, but will not fall completely out of storage tube 10;

[0033] Step 6: After the bottom plug 6 of the pipe-blocking assembly d is installed, repeat steps 2 to 5 above to complete the clamping and installation of the second-to-last plug 6 and the third-to-last plug 6.

[0034] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An automatic plug clamping device, characterized in that, The automatic plug clamping device includes: a bracket, a cylinder, a pneumatic clamp, multiple jaws, multiple plugs, and a storage tube; The bracket includes a top plate and a bottom plate that are parallel to each other, and a support plate is vertically connected between the top plate and the bottom plate; The cylinder is fixedly connected to the base plate, the pneumatic clamp is fixedly connected to the base plate, and the plurality of grippers are mounted on the drive end of the pneumatic clamp. The lower end of the storage tube is fixedly connected to the top plate. The storage tube is used to accommodate a plurality of plugs arranged from top to bottom. The pneumatic clamp drives the plurality of jaws to grasp the bottommost plug among the plurality of plugs. The bottommost plug is located outside the storage tube. When the bottommost plug is gripped by the plugging device, the pneumatic clamp is controlled to drive the multiple jaws to release the bottommost plug, and the cylinder is controlled to drive the pneumatic clamp to rise from the current first position to the second position. The pneumatic clamp is then controlled to drive the multiple jaws to grip the part of the bottommost plug that protrudes from the storage tube. Then, the cylinder is controlled to drive the pneumatic clamp to descend from the second position to the first position, and the previous plug and all the plugs above it move down together with the pneumatic clamp.

2. The automatic plug clamping device according to claim 1, characterized in that, The automatic plug clamping device includes a guide rod; The guide rod is connected between the top plate and the bottom plate, and the pneumatic clamp has a guide hole along the axial direction, through which the guide rod passes.

3. The automatic plug clamping device according to claim 2, characterized in that, The automatic plug clamping device includes multiple guide rods.

4. A pipe-blocking device, characterized in that, The pipe-blocking device includes: a lifting vehicle, a telescopic module, a pipe-blocking assembly, and an automatic plug clamping device as described in any one of claims 1 to 3; The automatic plug clamping device is connected to the lifting vehicle via a bracket, the telescopic module is connected to the lifting vehicle, and the plugging assembly is connected to the drive end of the telescopic module.

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