Video inspection guiding device for narrow space
By using a video inspection guide device with a two-way hook-head structure, wire rope, spring tube, snake bone and internal guide spring in a narrow space, the problem of low efficiency in video inspection and foreign object grabbing operations in a narrow space is solved, and efficient and accurate video inspection and foreign object grabbing are achieved.
Patent Information
- Application Number
- CN202510225114.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-06-06
AI Technical Summary
In a narrow space, video inspection and foreign object grabbing operations take a long time, tools are prone to wrap around, resulting in low operating efficiency and increased radiation dose.
A video inspection guide device including a two-way hook structure, a wire rope, a spring tube, a snake bone and an internal guide spring are designed. Through the structural cooperation of these components, the bending flexibility and precise positioning of the guide device are achieved.
This device can greatly reduce the inspection blind spots, improve the efficiency and quality of video inspection in small spaces, avoid the knotting of probe coils, increase the protection of video probes, extend its service life and reduce work costs.
Smart Images
Figure CN120101009A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a video inspection guide device used in a narrow space. Background Art
[0002] The SG (Steam Generator) of a nuclear power plant is a key device for heat exchange between the primary and secondary circuits. With the increase of operating time, foreign objects may be deposited or adhered to the secondary tube sheet from other pipelines or SG maintenance work. Through video inspection of the SG secondary tube sheet, not only can the operating status of the steam generator be clearly understood, but foreign objects can also be discovered and captured in time, effectively ensuring the subsequent stable operation of the unit.
[0003] In the related art, video inspection and foreign object grabbing of the secondary side of the steam generator are usually carried out manually. Due to the size limitations of the hands and eyelets on the secondary side of the steam generator and the dense arrangement of the heat transfer tubes inside, the operating space is narrow and the guide tool is difficult to adjust, resulting in a long time for the video inspection. In particular, when foreign objects are found on the secondary side of the steam generator, when the foreign object grabbing tool enters the designated tube room, the deflection of the tool itself and the traditional guide tube interact with each other, causing the foreign object grabbing tool to become entangled and unable to be quickly and accurately delivered to the designated foreign object grabbing position, which greatly increases the radiation dose of the video inspection and foreign object grabbing operators. Therefore, there is an urgent need to improve the inspection efficiency and convenience. Summary of the invention
[0004] In order to overcome the problems existing in the related art, a video inspection guide device for narrow space is provided.
[0005] According to one aspect of an embodiment of the present disclosure, there is provided a video inspection guide device for use in a narrow space, the device comprising: a two-way hook structure, two steel wire ropes, a propulsion tube armor layer, a propulsion tube outer jacket, a connecting tube, an internal guide spring, a steel wire fixing ring, a front end protection, a spring tube guide support block, and a guide tube;
[0006] The guide tube includes a spring tube, a tubular snake bone and an internal guide spring. The two-way hook structure is installed inside the handle housing. The handle housing is fixedly connected to the front end of the spring tube through a connecting structure. The rear end of the spring tube is fixedly connected to the front end of the snake bone through a connecting tube. The rear end of the snake bone is fixedly connected to the front end of the internal guide spring. The rear end of the internal guide spring is fixedly connected to a wire fixing ring. The connecting structure also includes a spring tube guide support block. The spring tube guide support block is an upwardly inclined structure, so that the front end of the spring tube is tilted upward at a preset angle.
[0007] The two steel wire ropes are relatively fixedly connected to the outside of the guide tube and are parallel to the axis of the guide tube. The front end of each steel wire rope is connected to the two-way hook structure, and the rear end is fixedly connected to the steel wire fixing ring.
[0008] In a possible implementation, the outer side of the spring tube is covered with a propulsion tube armor layer and a propulsion tube outer sheath in sequence from the inside to the outside, and the propulsion tube outer sheath has a wear-resistant and smooth surface.
[0009] In a possible implementation, the material of the outer sheath of the propulsion tube is nylon.
[0010] In a possible implementation, the propulsion tube is coated on the outside of the propulsion tube armor layer by thermoplastic.
[0011] In a possible implementation, a front end protection is installed at the rear end of the inner guide spring.
[0012] In a possible implementation, a plurality of bone joints are evenly laid on the outer surface of the inner guide spring.
[0013] In a possible implementation, the inner diameter of the guide tube is between 6 and 15 mm.
[0014] In one possible implementation, when conducting video inspection in a narrow space, the guide channel of the device is pushed inward along the gap of the video inspection container. After reaching the preset position, the video probe is sent along the guide tube from the video probe channel opening of the guide support block to the front end protection. The internal guide spring is then positioned at the specific inspection gap opening by rotating the two-way hook structure, the two-way hook structure is locked, and the probe is continued to be pushed into the gap to achieve the purpose of video inspection.
[0015] The beneficial effects of the present disclosure are as follows: the video inspection guide device for narrow spaces provided by the present disclosure is flexible in bending through the structural coordination between the steel wire rope, the spring tube, the snake bone and the internal guide spring, which can greatly reduce the inspection blind area and effectively improve the efficiency and quality of video inspection in narrow spaces; the video inspection probe is pushed to the specified position to avoid problems such as coiling and knotting of the probe when working alone in a narrow space, while increasing the protection of the video probe, increasing the service life of the video probe and reducing the working cost. The device can realize the rapid positioning inspection of the video inspection probe in a narrow space, and can transmit the foreign body grasping tool to accurately grasp the foreign body. The rapid positioning inspection of the video inspection probe in a narrow space and the change of the push direction of the probe increase the internal inspection range of the narrow space. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a cross-sectional view of a video inspection guide device for narrow spaces shown in an embodiment of the present disclosure.
[0017] Figure 2 is another cross-sectional view of a video inspection guide device for narrow spaces according to an embodiment of the present disclosure.
[0018] In the figure:
[0019] 1. Two-way hook structure, 2. Steel wire rope, 3. Spring tube, 4. Propulsion tube armor layer, 5. Propulsion tube outer layer,
[0020] 6. Connecting tube, 7. Lower end of snake bone, 8. Bone joint, 9. Internal guide spring, 10. Steel wire fixing ring,
[0021] 11. Front end protection, 12. Guide support block, 13. Guide tube. DETAILED DESCRIPTION
[0022] The present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.
[0024] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0025] Figure 1 is a cross-sectional view of a video inspection guide device for a narrow space shown in an embodiment of the present disclosure, Figure 2 is another cross-sectional view of a video inspection guide device for a narrow space shown in an embodiment of the present disclosure, such as Figure 1 and Figure 2 As shown, the device includes a two-way hook structure 1, two steel wire ropes 2, a propulsion tube armor layer 4, a propulsion tube outer jacket 5, a connecting tube 6, a bone joint 8, an internal guide spring 9, a steel wire fixing ring 10, a front end protection 11, a spring tube guide support block 12, and a guide tube 13.
[0026] The guide tube 13 includes a spring tube 3 and a tubular snake bone 7. The two-way hook structure 1 is installed inside the handle housing. The handle housing is connected to the front end of the spring tube 3 through a connecting structure. The rear end of the spring tube 3 is fixedly connected to the front end of the snake bone 7 through a connecting tube 6. The rear end of the snake bone 7 is fixedly connected to the front end of the internal guide spring 9. A plurality of bone nodes 8 are evenly laid on the outer surface of the internal guide spring 9. The rear end of the internal guide spring 9 is fixedly connected to a wire fixing ring 10. Figure 2 The connection structure also includes a spring tube guide support block 12, which is an upwardly inclined structure, so that the front end of the spring tube 13 is tilted upward at a preset angle. The tilt angle design can ensure that the probe or foreign body grabbing tool is smoothly inserted into the spring tube, and can also be used as a reference point when the guide device is rotated to be inserted into a three-dimensional narrow space such as a steam generator, so that the guide spring 9 at the front end of the guide device can be operated in the designed 180° mechanical rotation direction when it contacts the inner surface of the container, avoiding the rotation direction of the internal guide spring 9 being perpendicular to the inner surface of the container, causing the guide device to be unable to operate or damaged.
[0027] Two steel wire ropes 2 are relatively fixedly connected to the outside of the guide tube 13 and are parallel to the axis of the guide tube 13. The front end of each steel wire rope 2 is connected to the rotating component structure in the two-way hook structure 1, ensuring that when the two-way hook handle is rotated by external force, the front end internal guide spring 9 can be normally controlled to turn left and right within a positive and negative 90° angle. The rear end of the steel wire rope 2 is fixedly connected to the steel wire fixing ring 10. The steel wire fixing ring 10 can ensure that the steel wire rope 2 drawn from the two-way hook structure 1 at the handle control end and embedded in the propulsion tube armor layer 4 is stable and reliable, so that the handle can be controlled accurately.
[0028] The two-way hook structure 1, the wire rope 2, the propulsion tube armor layer 4 and the wire fixing ring 10 are fixedly connected in a special way. By operating the two-way hook structure 1 with a handle, the internal guide spring 9 can be controlled to perform traction and guidance within an angle range of 0° to 180°. When the guide device is in a completely natural state, the guide support block 12 with an inclined angle is used as a reference point to rotate the guide spring 9 in a direction parallel to the inner surface of the container and send the guide device to the inside of the container. The endoscope is sent into the guide tube 13 until the endoscope head extends out of the internal guide spring 9. The endoscope transmits the three-dimensional space image back in real time. By operating the two-way hook handle, the front internal guide spring 9 rotates with the inserted endoscope in the positive and negative directions of 90° to accurately locate the internal gap of the container. The endoscope extends from the internal guide spring 9 with a fixed angle, and the sent probe moves straight forward. The narrow gap and the spring tube 3 and the internal guide spring 9 limit the moving path of the endoscope probe or the foreign body grasping tool to avoid winding and knotting of the endoscope probe and loss of pushing force. It can not only fix the extension direction of the video inspection probe in the channel, but also adjust the angle so that the internal guide spring 9 is close to the internal gap inspection port. The combination of the two solves the problem of blind spots in probe inspection and can effectively improve the efficiency and quality of video inspection in narrow spaces.
[0029] The outer side of the spring tube 3 is covered with the propulsion tube armor layer 4 and the propulsion tube outer sheath 5 from the inside to the outside, and the two steel wire ropes 2 are embedded in the propulsion tube armor layer 4. The propulsion tube outer sheath 5 has a wear-resistant and smooth appearance. The guide tube 13, the propulsion tube armor layer 4, the propulsion tube outer sheath 5 and the connecting tube 6 form a video inspection probe channel. The guide tube 13, the propulsion tube armor layer 4 and the propulsion tube outer sheath 5 can ensure that the tool can be pushed forward in a narrow space while maintaining sufficient hardness and having good toughness. The propulsion tube outer sheath 5 reduces the tool's propulsion resistance and the propulsion force loss, and can realize long and deep distance internal inspection work. In a possible implementation, the material of the propulsion tube outer sheath is nylon, and it can be thermoplastically coated on the outside of the propulsion tube armor layer.
[0030] The rear end of the internal guide spring 9 is equipped with a front end protection 11, which is used to protect the internally pushed video probe from contact wear and surface contact without damage during inspection of the internal structure in a narrow space. The design of the joint 8 can offset the material deformation of the internal guide spring 9 during the direction adjustment process, so that the entire tool can be used repeatedly, improving the efficiency of tool use and reducing equipment costs. The snake bone 7 can make the front and rear two parts of the structure transition smoothly and connect firmly, which is conducive to improving the sensitivity of the operation of the two-way hook structure 1. The guide support block 12 is the entrance of the video inspection probe. The protruding structure of the guide support block 12 increases the contact area of the endoscope probe or the foreign body grasping tool, and balances the force at the contact point. The operation process can not only avoid the interaction between the guide port and the endoscope or the foreign body grasping tool to cause damage, but also reduce the operator's head control force to reduce the endoscope or foreign body grasping tool from sliding out, ensuring that the inspection video is clearer and more stable.
[0031] In one possible implementation, the inner diameter of the guide tube is between 6 and 15 mm, and the guide channel material of the spring tube inside the guide tube has moderate elasticity and hardness, which not only limits the problems of winding and knotting of the endoscope or foreign body grasping tool in the guide channel and loss of pushing force, but also increases the protection of the video probe and foreign body grasping tool, improves the service life of the video probe and foreign body grasping tool and reduces working costs.
[0032] When conducting video inspection in a narrow space, the operator can push the guide channel composed of the wire rope 2, spring tube 3, propulsion tube armor layer 4, propulsion tube outer jacket 5, connecting tube 6, snake bone 7, bone joint 8, internal guide spring 9, wire fixing ring 10, and front end protection 11 inward along the video inspection container gap. After reaching a certain position, the video probe is sent from the video probe channel opening of the guide support block 12 along the guide tube 13 to the front end protection 11. At this time, the probe can clearly see the internal situation of the container, and then the internal guide spring 9 is positioned at the specific inspection gap opening by rotating the two-way hook structure 1, the two-way hook structure 1 is locked, and the probe is continued to be pushed into the gap to achieve the purpose of video inspection.
[0033] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A video inspection guide device for narrow spaces, characterized in that: The device comprises: a two-way hook structure, two steel wire ropes, a propulsion tube armor layer, a propulsion tube outer jacket, a connecting tube, an internal guide spring, a steel wire fixing ring, a front end protection, a spring tube guide support block, and a guide tube; The guide tube includes a spring tube, a tubular snake bone and an internal guide spring. The two-way hook structure is installed inside the handle housing. The handle housing is fixedly connected to the front end of the spring tube through a connecting structure. The rear end of the spring tube is fixedly connected to the front end of the snake bone through a connecting tube. The rear end of the snake bone is fixedly connected to the front end of the internal guide spring. The rear end of the internal guide spring is fixedly connected to a wire fixing ring. The connecting structure also includes a spring tube guide support block. The spring tube guide support block is an upwardly inclined structure, so that the front end of the spring tube is tilted upward at a preset angle. The two steel wire ropes are relatively fixedly connected to the outside of the guide tube and are parallel to the axis of the guide tube. The front end of each steel wire rope is connected to the two-way hook structure, and the rear end is fixedly connected to the steel wire fixing ring.
2. The device according to claim 1, characterized in that The outer side of the spring tube is covered with a propulsion tube armor layer and a propulsion tube outer sheath from the inside to the outside, and the propulsion tube outer sheath has a wear-resistant and smooth surface.
3. The device according to claim 2, characterized in that The outer jacket of the propulsion tube is made of nylon.
4. The device according to claim 2, characterized in that The outer quill of the propulsion tube is thermoplastically coated on the outer side of the propulsion tube armor layer.
5. The device according to claim 1, characterized in that A front end guard is mounted on the rear end of the inner guide spring.
6. The device according to claim 1, characterized in that A plurality of bone joints are evenly laid on the outer surface of the inner guide spring.
7. The device according to claim 1, characterized in that When conducting video inspection in a narrow space, push the guide channel of the device inward along the gap of the video inspection container. After reaching the preset position, send the video probe along the guide tube from the video probe channel opening of the guide support block to the front end protection. Then, rotate the two-way hook structure to position the internal guide spring to the specific inspection gap opening, lock the two-way hook structure, and continue to push the probe into the gap to achieve the purpose of video inspection.