An emergency uncovering device for the underwater sleeve of an off-line leak test equipment

Abstract

The utility model provides a kind of emergency uncovering device for offline leak test equipment underwater sleeve, comprising: drive part, drive part is configured as can be fixed in the shore of pool, and there is power output end;Flexible connecting piece, flexible connecting piece one end is connected with power output end, other end is connected with the cylinder cover of underwater sleeve;Wherein, drive part drives power output end rotation, power output end drives flexible connecting piece to pull cylinder cover to move.The emergency uncovering device is driven by shore drive part to pull flexible connecting piece to pull cylinder cover to move, opens the cylinder mouth of underwater sleeve, realizes the effect of emergency uncovering;And the emergency uncovering device drive part is arranged in the shore, only the end of flexible connecting piece connected on cylinder cover is located underwater, reduce the corrosion effect of emergency uncovering device whole, improve the environment that emergency uncovering device is immersed in water for a long time, when maintaining, only need to repair or replace flexible connecting piece, greatly reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of offline leak testing equipment for nuclear power plant fuel assemblies, and in particular to an emergency opening device for an underwater sleeve of an offline leak testing equipment. Background Technology

[0002] Offline leak detection equipment for nuclear power plant fuel assemblies is a key piece of equipment in the nuclear power plant fuel cycle system. Its main function is to perform leak tests on fuel assemblies in the spent fuel pool. The equipment is completely submerged in the spent fuel pool during operation. By placing the fuel assembly to be tested in a specially designed underwater testing sleeve, a closed testing environment is established to conduct leak tests. The fuel assembly to be tested is placed in the underwater sleeve for inspection. Currently, conventional sleeve cover opening and closing mechanisms mostly adopt pneumatic drive, mainly using compressed air to drive the cylinder to realize the opening and closing action of the sleeve cover.

[0003] The existing lid opening device has the following defects: when the power supply to the equipment is interrupted or the pneumatic system fails, the conventional lid opening device completely loses its function; when the pneumatic circuit leaks, it cannot maintain the normal working pressure, and the lid cannot be opened in time. Utility Model Content

[0004] This utility model provides an emergency opening device for an underwater sleeve of an offline leak test equipment, in order to solve the technical problem that the normal working pressure cannot be maintained when the pneumatic circuit leaks, and the sleeve cover cannot be opened in time.

[0005] This utility model provides an emergency opening device for an underwater sleeve of an offline leak test equipment, comprising: a drive unit configured to be fixed to the bank of a wastewater pond and having a power output end; and a flexible connector, one end of which is connected to the power output end and the other end of which is connected to the sleeve cap of the underwater sleeve. The drive unit drives the power output end to rotate, and the power output end drives the flexible connector to pull the sleeve cap to move. When a conventional opening device is used, the flexible connector will not obstruct the movement of the sleeve cap on one side during the movement process, ensuring smooth movement of the sleeve cap to one side.

[0006] In one embodiment of this utility model, the driving unit includes a winding reel and a bracket. The bracket is installed on the ground and is firmly fixed to the ground by anchor bolts, allowing the device to be disassembled and moved. The position of the device can be arranged according to the actual site conditions. The winding reel is rotatably mounted on the bracket and is mounted on the bracket by a high-load bearing. This rigid connection structure can stably withstand the working load of the cylinder cover and the dynamic impact force during operation. The flexible connector is a slender piece, with one end wound on the winding reel and the other end connected to the cylinder cover.

[0007] In one embodiment of this utility model, the flexible connector is one of a rope, a chain, or a stainless steel chain.

[0008] In one embodiment of this utility model, the bracket is further provided with a guide wheel, which is located below the flexible connector and presses upward against the flexible connector. This not only reduces the direct friction between the flexible connector and the bracket, extending its service life, but also ensures that the stainless steel chain remains neatly arranged during winding, avoiding tangling or jamming.

[0009] In one embodiment of this utility model, waterproof sealing rings are provided on the bearings at both ends of the guide wheel, which effectively isolates the corrosion of pool water or humid environment, significantly improves the durability of the bearings, and reduces the maintenance frequency.

[0010] In one embodiment of this utility model, the reel is provided with a rocker arm for driving the reel to rotate, which conforms to ergonomic design and facilitates the operator's application of force. A three-stage gear reduction mechanism can also be used between the reel and the rocker arm to increase the transmission ratio, which greatly reduces the operating force compared to the traditional direct connection structure, allowing the operator to easily operate with one hand.

[0011] In one embodiment of this utility model, the reel is provided with a self-locking structure. When the operator loses control of the reel due to slippage or other factors, the self-locking structure prevents the reel from reversing, thereby holding the flexible connector in place and preventing the cap from moving back, thus ensuring its opening effect. The self-locking structure includes a slide rail and a slider. The slider is slidably disposed on the slide rail, which is located on the side of the reel below that rotates upward from the lowest point, and its length direction is along the circumference of the reel. This allows the slider to be pushed upward on the slide rail when the reel rotates forward to take in the yarn, without obstructing the rotation of the reel. The linear distance between the slide rail and the reel gradually increases from bottom to top. When the reel is subjected to tension and begins to rotate in the opposite direction, the slider moves downward on the slide rail, causing the upper surface of the slider to gradually contact the surface of the outer edge plate. When the slider is located at the lower end of the slide rail, its upper surface is pressed against the outer edge plate of the reel. Both the upper surface of the slider and the outer edge plate of the winding reel are toothed, meshing together. As the slider slides down under gravity and tension, the teeth gradually engage, preventing instantaneous jamming, reducing mechanical impact, and extending service life. The slider's limiting action locks the winding reel in place, achieving a self-locking effect. The mechanical self-locking mechanism between the slider and the outer edge plate requires no electric or hydraulic assistance, resulting in a simple structure that is less prone to failure and suitable for harsh environments. Furthermore, by adjusting the tilt angle of the slide rail or the weight of the slider, the self-locking response speed and locking force can be optimized to adapt to different load requirements.

[0012] In one embodiment of this utility model, the upper surface of the slider and the outer edge plate of the winding reel are both provided with teeth, and the teeth on the two surfaces mesh with each other. A pressure rod is provided below the winding reel. One end of the pressure rod is rotatably connected to one end of a connecting rod, and the other end extends outward. The other end of the connecting rod is rotatably connected to the slider. A fulcrum is provided on the pressure rod. When the cylinder cover is subjected to underwater pressure and is in an initially fully closed position, the force required to pull the cylinder cover will be relatively large. The operator may not be able to exert enough force by simply turning the rocker arm by hand. Therefore, the operator can step on the extended end of the pressure rod with their foot at the same time, using the lever principle to lift the other end. This will cause the slider to move upward through the connecting rod, and the meshing teeth will apply a pushing force to the winding reel. Combined with the force of the operator turning the rocker arm by hand, the cylinder cover can be pushed.

[0013] In one embodiment of the present invention, one end of the flexible connector is connected to the middle of one side of the cylinder cover, which can effectively ensure that the cylinder cover achieves a smooth translational movement during the opening process, avoid generating unnecessary rotational torque, and pull the cylinder cover out.

[0014] In one embodiment of this utility model, the bottom of the bracket is connected to the ground by bolts, thereby enabling quick installation and flexible movement.

[0015] The beneficial effects of this utility model are as follows: This utility model proposes an emergency opening device for an underwater sleeve of an offline leak test equipment. When the equipment power supply is interrupted or the pneumatic system fails, preventing the sleeve cover from being opened in time, the operator first manually opens the solenoid valve of the original pneumatic circuit to release pressure. The flexible connector is then pulled by the shore-side drive unit to move the sleeve cover, opening the sleeve opening and achieving the effect of emergency opening. Furthermore, the drive unit of this emergency opening device is located on the shore, with only the end of the flexible connector connected to the sleeve cover underwater. This reduces the corrosion effect on the entire emergency opening device, improves the environment of the device being immersed in water for a long time, and only requires repair or replacement of the flexible connector during maintenance, greatly reducing maintenance costs.

[0016] The function of the flexible connector: When the conventional lid opening device is in use, the flexible connector will not block one side and hinder its movement during the process of pushing the lid to move, which can ensure that the lid moves smoothly to one side.

[0017] The underwater sleeves at different heights have different cap heights from the ground. This device can be disassembled and moved. The position of the device can be arranged according to the actual site conditions to make the angle of the flexible connector relative to the cap more suitable, ensuring that the flexible connector and the cap maintain the best traction angle. At the same time, connecting one end of the flexible connector to the middle of one side of the cap can effectively ensure that the cap can achieve smooth translation during opening, avoid generating unnecessary rotational torque, and facilitate the translation and pulling out of the cap. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of an emergency lid-opening device provided in an embodiment of the present invention;

[0021] Figure 2 This is a top view of a winding reel provided in one embodiment of the present invention;

[0022] Figure 3 This is a side view of a winding reel provided in one embodiment of the present invention.

[0023] The attached figures are labeled as follows:

[0024] 100. Underwater sleeve; 110. Sleeve cap;

[0025] 200. Drive unit; 210. Winding reel; 211. Outer edge plate; 220. Bracket; 230. Guide wheel; 240. Rocker arm;

[0026] 300. Flexible connectors;

[0027] 400. Self-locking structure; 410. Slide rail; 420. Slider; 430. Pressure rod; 440. Connecting rod. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0031] Please see Figures 1 to 3 This utility model provides an emergency opening device for an underwater sleeve of an offline leak test equipment. When the equipment power supply is interrupted or the pneumatic system fails, making it impossible to open the sleeve cover 110 in time, the shore-side drive unit 200 pulls the flexible connector 300 to move the sleeve cover 110, thereby opening the opening of the underwater sleeve 100 and achieving the effect of emergency opening.

[0032] Please see Figure 1 In one example of the present invention, the emergency cover opening device includes: a drive unit 200, which is configured to be fixed to the bank of the wastewater pool and has a power output end; a flexible connector 300, one end of which is connected to the power output end and the other end of which is connected to the cover 110 of the underwater sleeve 100; wherein, the drive unit 200 drives the power output end to rotate, and the power output end drives the flexible connector 300 to pull the cover 110 to move. When the power supply to the equipment is interrupted or the pneumatic system fails, the pneumatic circuit leaks and cannot maintain the normal working pressure. The conventional opening device becomes completely ineffective, preventing the cylinder cover 110 from opening in time. In this case, the staff first manually opens the solenoid valve of the original pneumatic circuit to release pressure, and then drives the flexible connector 300 through the drive unit 200 to pull the cylinder cover 110 to move, thus realizing the function of emergency opening. Moreover, the drive unit 200 of this emergency opening device is located on the shore, and only the end of the flexible connector 300 connected to the cylinder cover 110 is underwater, which reduces the corrosion effect on the overall emergency opening device and improves the environment of the emergency opening device being immersed in water for a long time. During maintenance, only the flexible connector 300 needs to be repaired or replaced, which greatly reduces maintenance costs.

[0033] Furthermore, the present invention uses a flexible connector 300 to transmit force. When a conventional lid opening device can be used, during the process of pushing the lid 110 to move, the flexible connector 300 will not block one side and hinder its movement, thus ensuring that the lid 110 can move smoothly to one side.

[0034] Please see Figure 1In one example of the present invention, the underwater sleeves 100 at different heights have different caps 110 heights from the ground. The bottom of the bracket 220 is connected to the ground by bolts to achieve quick installation and flexible movement. The device can be disassembled and moved. The position of the device can be arranged according to the actual site conditions so that the angle of the flexible connector 300 relative to the cap 110 is more suitable, ensuring that the flexible connector 300 and the cap 110 maintain the best traction angle. At the same time, connecting one end of the flexible connector 300 to the middle of one side of the cap 110 can effectively ensure that the cap 110 achieves a smooth translational movement during the opening process, avoiding unnecessary rotational torque, and making it easy to pull out the cap 110.

[0035] Please see Figure 1 and Figure 2 In one example of the present invention, the drive unit 200 includes a reel 210 and a bracket 220. The bracket 220 is firmly fixed to the ground by anchor bolts, and the reel 210 is mounted on the bracket 220 by a high-load bearing. This rigid connection structure can stably withstand the working load of the cylinder cover 110 and the dynamic impact force during operation. This design ensures the stability of the overall structure and can withstand the load of the cylinder cover 110 and the dynamic force during operation. The reel 210 is provided with a rocker arm 240 for driving the reel 210 to rotate, which is ergonomically designed and convenient for operators to apply force. The flexible connector 300 is a stainless steel chain, one end of which is wound on the reel 210, and the other end is connected to the cylinder cover 110. The operator manually rotates the rocker arm 240, which drives the reel 210 to rotate, and rewinds the stainless steel chain back onto the reel 210, thereby pulling the cylinder cover 110 through the stainless steel chain. The stainless steel chain is simple to manufacture, low in cost, and convenient to use and maintain.

[0036] The flexible connector 300 can also be made of stainless steel chains (with stronger corrosion resistance) or high-strength synthetic fiber ropes (lightweight and rust-free), or other flexible and slender structures. Similarly, a layer of anti-corrosion and anti-rust coating (such as galvanizing or epoxy resin) can be applied to the surface to reduce the corrosive effect of pool water.

[0037] Furthermore, a three-stage gear reduction mechanism can be used between the reel 210 and the rocker arm 240 to increase the transmission ratio, which greatly reduces the operating force compared to the traditional direct connection structure, allowing the operator to easily operate with one hand.

[0038] Please see Figure 1 In one example of the present invention, the bracket 220 is also provided with a guide wheel 230. The guide wheel 230 is located below the flexible connector 300 and pushes upward against the flexible connector 300, supporting the flexible connector 300. This not only reduces the direct friction between the flexible connector 300 (such as a stainless steel chain) and the bracket 220, extending its service life, but also ensures that the stainless steel chain remains neatly arranged during the winding process, avoiding tangling or jamming.

[0039] Waterproof seals are provided on the bearings at both ends of the guide wheel 230, which effectively isolates the corrosion of pool water or humid environment, significantly improves the durability of the bearings, and reduces the maintenance frequency.

[0040] Please see Figure 3 In one example of the present invention, the reel 210 is provided with a self-locking structure 400. When the operator rotates the rocker arm 240 to control the reel 210 to take in the flexible connector 300 (such as a stainless steel chain), the self-locking structure 400 controls the reel 210 to rotate only in the direction of take-up. When the operator loses control of the reel 210 due to slippage or other factors, the self-locking structure 400 prevents the reel 210 from reversing, thereby pulling the flexible connector 300 (such as a stainless steel chain) to prevent the sleeve cover 110 from moving back and ensuring the opening effect of its underwater sleeve 100.

[0041] The self-locking structure 400 includes a slide rail 410 and a slider 420. The slider 420 is slidably mounted on the slide rail 410, which is located on the side of the reel 210 that rotates upwards from its lowest point, with its length along the circumference of the reel 210. This allows the slider 420 to be pushed upwards on the slide rail 410 when the reel 210 is rotating in the forward direction to reel in the cable, without obstructing the rotation of the reel 210. When the operator loses control of the reel 210 due to slippage or other factors, the reel 210 is pulled by the flexible connector 300 (such as a stainless steel chain) and the cap 110, causing it to rotate in the reverse direction. At this time, the slider 420 moves downwards on the slide rail 410. Because the slide rail 410 rotates upwards from bottom to top, it is in contact with the reel 210. The linear distance between the slider 420 and the outer edge plate 211 of the reel 210 gradually increases, while the distance between the slider 420 and the outer edge plate 211 of the reel 210 decreases as the slider descends. This allows the upper surface of the slider 420 to gradually contact the surface of the outer edge plate 211. Both the upper surface of the slider 420 and the surface of the outer edge plate 211 of the reel 210 are provided with teeth that mesh with each other. When the slider 420 slides down to the lower end of the slide rail 410, its upper surface presses against the outer edge plate 211 of the reel 210, and the slider 420 is simultaneously squeezed between the surface of the outer edge plate 211 and the slide rail 410. The slider 420 slides down under the action of gravity and tension, and the teeth gradually mesh without jamming instantly, reducing mechanical impact and extending service life. By limiting the slider 420, the reel 210 is locked, achieving a self-locking effect.

[0042] Meanwhile, the slider 420 engages with the outer edge plate 211 using a mechanical self-locking mechanism, requiring no electric or hydraulic assistance. Its simple structure and resistance to failure make it suitable for harsh environments (such as humid or corrosive conditions). Furthermore, by adjusting the tilt angle of the slide rail 410 or the weight of the slider 420, the self-locking response speed and locking force can be optimized to adapt to different load requirements.

[0043] A pressure rod 430 is located below the reel 210. One end of the pressure rod 430 is rotatably connected to one end of the connecting rod 440, and the other end extends outward. The other end of the connecting rod 440 is rotatably connected to the slider 420. A fulcrum is provided on the pressure rod 430. When the power supply to the equipment is interrupted or the pneumatic system fails, preventing the drum cover 110 from opening in time, the operator needs to rotate the rocker arm 240 to control the reel 210 to retract the flexible connector 300. However, the drum cover 110 is under underwater pressure and is in an initially fully closed position. If the operator needs to rotate the rocker arm 240 to control the reel 210 to retract the flexible connector 300 at this time, the force required to pull the drum cover 110 will be relatively large. Correspondingly, the torque applied by the operator through the rocker arm 240 on the reel 210 will also be relatively large. However, if the operator only manually rotates the rocker arm 240... If the force is insufficient, you can step on the extended end of the pressure rod 430 with your foot (this end can be equipped with a pedal for easy foot use). Using the lever principle, the other end will be lifted, and the slider 420 will be moved upward through the connecting rod 440. Although it will gradually disengage from the outer edge plate 211 during the upward movement, at the beginning, a pushing force can be applied to the winding reel 210 through the meshing teeth. Combined with the force of the operator turning the rocker arm 240, the problem of the cylinder cover 110 being in the initially fully closed position and requiring a large enough force to push can be overcome.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An emergency opening device for an underwater sleeve of an offline leak testing equipment, characterized in that, include: A drive unit, which is configured to be fixed to the bank of the wastewater pond and has a power output end; A flexible connector, one end of which is connected to the power output end and the other end of which is connected to the cap of the underwater sleeve; The drive unit drives the power output end to rotate, and the power output end drives the flexible connector to pull the cylinder cover to move.

2. The emergency lid-opening device according to claim 1, characterized in that, The drive unit includes a reel and a bracket, the bracket is mounted on the ground, and the reel is rotatably mounted on the bracket; The flexible connector is a long and slender piece, with one end wound around the winding spool and the other end connected to the cylinder cover.

3. The emergency lid-opening device according to claim 2, characterized in that, The flexible connector is one of the following: rope, chain, or stainless steel chain.

4. The emergency lid-opening device according to claim 2, characterized in that, The bracket is also equipped with guide wheels, which are located below the flexible connector and press upward against the flexible connector.

5. The emergency lid-opening device according to claim 4, characterized in that, Waterproof sealing rings are provided on the bearings at both ends of the guide wheel.

6. The emergency lid-opening device according to claim 2, characterized in that, The reel is equipped with a rocker arm for driving the reel to rotate.

7. The emergency lid-opening device according to claim 2, characterized in that, The winding reel is equipped with a self-locking structure; The self-locking structure includes a slide rail and a slider. The slider is slidably mounted on the slide rail, which is located on the side below the winding reel that rotates upward from the lowest point, and its length direction is along the circumference of the winding reel. The straight-line distance between the slide rail and the winding reel gradually increases from bottom to top. When the slider is located at the lower end of the slide rail, its upper surface is pressed against the outer edge plate of the winding reel.

8. The emergency lid-opening device according to claim 7, characterized in that, The upper surface of the slider and the outer edge plate of the winding reel are both provided with teeth, and the teeth on the two surfaces mesh with each other. A pressure rod is provided below the winding reel. One end of the pressure rod is rotatably connected to one end of the connecting rod, and the other end extends outward. The other end of the connecting rod is rotatably connected to the slider. A fulcrum is provided on the pressure rod.

9. The emergency lid-opening device according to claim 1, characterized in that, One end of the flexible connector is connected to the middle of one side of the cylinder cover, which allows the cylinder cover to be pulled out horizontally.

10. The emergency lid-opening device according to claim 2, characterized in that, The bottom of the bracket is connected to the ground by bolts.

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