A waste filter cartridge remote grab release tool

Abstract

This application relates to a remote gripping and releasing tool for waste filter cartridges, comprising a boom, a sliding seat on the boom, a slide rail within the sliding seat, a slide rod slidably connected within the slide rail via a connecting assembly, the slide rod being inserted into a filter cartridge mounting hole, a receiving groove within the slide rod, and two connecting frames hinged to the inner side wall of the receiving groove, each connecting frame having a gripping hook at its end, a counterweight flange and a drive assembly on the slide rod, the counterweight flange being fixedly sleeved on the outer periphery of the slide rod, and the drive assembly driving the two connecting frames to rotate. This application improves the safety and efficiency of filter cartridge replacement.

Description

Technical Field

[0001] This application relates to the field of gripping tools, and in particular to a remote gripping and releasing tool for waste filter cartridges. Background Technology

[0002] As a common filtration component in nuclear power facilities, the filter element inside the filter gradually accumulates pollutants due to the continuous performance of its filtration function during long-term use. When the amount of impurities and dirt filtered by the filter element reaches a certain level, in order to ensure the safety of drainage in the nuclear power environment, the filter element needs to be replaced and subjected to harmless treatment.

[0003] Currently, the replacement of waste filter cartridges in domestic nuclear power plants is still generally done manually. Specifically, during replacement, maintenance personnel must wear heavy protective suits and manually clean or replace the filter cartridges after tedious preparation steps such as sterilization and disinfection. However, during the entire operation, maintenance personnel have to be in close contact with radioactive filter cartridges, which makes them extremely vulnerable to radiation damage and seriously reduces the safety of filter cartridge replacement. At the same time, the cumbersome operation process reduces the efficiency of filter cartridge replacement and has obvious shortcomings. Utility Model Content

[0004] To improve the safety and efficiency of filter replacement, this application provides a tool for remotely grabbing and releasing waste filter elements.

[0005] The waste filter cartridge remote grabbing and releasing tool provided in this application adopts the following technical solution:

[0006] A remote gripping and releasing tool for waste filter cartridges includes a boom, a sliding seat on the boom, a slide rail inside the sliding seat, a slide rod slidably connected to the slide rail via a connecting assembly, the slide rod being inserted into a filter cartridge mounting hole, a receiving groove inside the slide rod, two connecting frames hinged to the inner side wall of the receiving groove, each connecting frame having a gripping hook at its end, a counterweight flange and a driving assembly on the slide rod, the counterweight flange being fixedly sleeved on the outer periphery of the slide rod, and the driving assembly driving the two connecting frames to rotate.

[0007] By adopting the above technical solution, the boom is mounted on a crane, the wire rope is released, and the boom drives the slide bar to insert into the filter element lifting hole. When the counterweight flange abuts against the outer end face of the filter element, the slide bar can no longer slide downwards. Under the action of gravity, the sliding seat moves upwards relative to the slide bar. The drive component drives the grab hook to open and hook the filter element. Finally, the crane lifts the wire rope to pull the boom to move. After the boom moves the filter element to the designated position, the wire rope is released again. Under the action of gravity, the sliding seat moves downwards relative to the slide bar. The drive component drives the grab hook to close and retract into the receiving groove. Finally, the wire rope is pulled up so that the boom drives the slide bar to disengage from the filter element lifting hole. In this way, the filter element can be replaced. The whole process is carried out with the help of a crane and grabbing and releasing tools, eliminating the need for maintenance personnel to have close contact with the radioactive filter element. The operation steps are simple, improving the safety and efficiency of the filter element replacement operation.

[0008] Optionally, the drive assembly includes a guide seat fixedly disposed at the bottom end of the sliding seat, the guide seat being slidably sleeved on the outer surface of the slide rod, and sliding pins being provided on opposite sides of the guide seat. Each connecting frame has a connecting rod hinged to its end away from the grab hook, and a sliding groove is provided on the connecting rod to slide and engage with the sliding pin. The sliding groove is inclined.

[0009] By adopting the above technical solution, when the sliding seat moves up and down relative to the sliding rod under the action of gravity, the sliding seat drives the two sliding pins on the guide seat to slide up and down in the sliding groove. Since the sliding groove is inclined, the sliding pins will push the connecting rod to swing left and right when they move. The swinging of the connecting rod will drive the connecting frame to rotate, thereby realizing the opening or closing of the grab hook. Moreover, the driving source of the drive component relies on the displacement of the sliding seat under the action of gravity, eliminating the need for a complex electrical drive system and reducing the manufacturing cost and maintenance difficulty of the tool.

[0010] Optionally, the connecting assembly includes a guide post slidably disposed inside the slide rail, a connecting seat being provided on the guide post, and the connecting seat and the slide rod being detachably connected by connecting bolts.

[0011] By adopting the above technical solution, when the tool needs maintenance or repair or the corresponding slide rod needs to be replaced to adapt to filter elements of different sizes and specifications, the connecting seat and slide rod can be separated simply by removing the connecting bolts. There is no need to disassemble the entire tool, which greatly simplifies the maintenance and replacement operation process and reduces the maintenance cost of the tool.

[0012] Optionally, the slide rail includes a first inclined groove and a second inclined groove that are interconnected. Two first inclined grooves and two second inclined grooves are symmetrically arranged. The first inclined grooves and the second inclined grooves are inclined from bottom to top along a direction away from the axis of the sliding seat. The ends of the two second inclined grooves are connected by a snap-fit ​​groove. Initially, the guide post is set in the connecting part of the two first inclined grooves and the two grabs are in a closed state. During operation, the guide post is set in the snap-fit ​​groove and the two grabs are in an open state.

[0013] By adopting the above technical solution, when the filter element is hooked, the slide bar cannot continue to slide downward. At this time, the sliding seat moves downward a certain distance under the action of gravity, and the guide post moves upward along the first inclined groove to the connection between the first inclined groove and the second inclined groove. Then, under the guidance of the second inclined groove, the sliding seat moves upward relative to the guide post, causing the guide post to transfer into the locking groove. The sliding seat drives the sliding pin to move to the top of the sliding groove, and the hook opens. When the filter element is released, the wire rope slackens, and the sliding seat moves downward relative to the guide post under its own gravity. The guide post moves along the second inclined groove to the connection between the two first inclined grooves. At the same time, the sliding pin moves downward along the sliding groove, and the two hooks close. The setting of the slide rail strictly limits the sliding trajectory of the guide rod in the sliding seat, ensuring that the two hooks open and close smoothly.

[0014] Optionally, a stop surface is provided on the snap-fit ​​groove, and a limiting component is provided in the slide rail. The limiting component and the stop surface limit the guide post from moving along the length trajectory of the slide rail in a single direction.

[0015] By adopting the above technical solution, when the guide column moves along the length trajectory of the slide, the stop surface and the limiting component work together to restrict the sliding direction of the guide column, reducing the possibility of jamming caused by the guide column moving in the opposite direction in the slide, thereby ensuring the smooth movement of the grab hook.

[0016] Optionally, the limiting component includes a first stop and a second stop. The first stop is rotatably disposed at the connection between the two first inclined slots, and the second stop is rotatably disposed inside the snap-fit ​​groove. A reset torsion spring is sleeved on the rotation shaft of both the first stop and the second stop. In its natural state, the protruding end of the second stop faces the stop surface, and the protruding end of the first stop faces the opposite direction to the second stop.

[0017] By adopting the above technical solution, when the guide column moves from the first inclined groove to the second inclined groove, the first stop restricts the guide column to enter the second inclined groove from only one direction. When the guide column moves from the snap-fit ​​groove into the second inclined groove, the stop surface and the second stop restrict the direction of movement of the guide column. By limiting the guide column to slide in the slide in only one direction through the two limiting points, the smooth movement of the grab hook is ensured.

[0018] Optionally, a protective sleeve is provided on the boom, and the protective sleeve covers the outer periphery of the sliding seat.

[0019] By adopting the above technical solution, the protective cylinder can reduce the impact of external collisions on components such as the sliding seat during the process of grabbing and releasing the filter element, thereby ensuring the stability of the movement of the sliding rod and the grab hook, reducing the situation where the grab hook does not firmly grab the filter element or releases it in time due to component shaking, and improving operational reliability.

[0020] Optionally, the bottom end of the slide bar is tapered.

[0021] By adopting the above technical solution, when the slide rod is inserted into the installation hole of the filter element, the conical structure uses its own guiding characteristics to reduce the difficulty of aligning the slide rod with the installation hole of the filter element and guide the slide rod to be smoothly inserted into the hole.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application utilizes a sliding rod, a grab hook, and a drive assembly to load a boom onto a crane. The wire rope is released, and the boom drives the sliding rod to insert into the filter element's lifting hole. When the counterweight flange abuts against the outer end face of the filter element, the sliding rod can no longer slide downwards. Under the influence of gravity, the sliding seat moves upwards relative to the sliding rod. The drive assembly then drives the grab hook to open and hook the filter element. Finally, the crane lifts the wire rope, pulling the boom to move. After the boom moves the filter element to the designated position, the wire rope is released again. Under the influence of gravity, the sliding seat moves downwards relative to the sliding rod, and the drive assembly drives the grab hook to close and retract into the receiving groove. Finally, the wire rope is pulled, causing the boom to lift the sliding rod out of the filter element's lifting hole. This achieves filter element replacement. The entire process, aided by a crane and grab / release tools, eliminates the need for maintenance personnel to have close contact with the radioactive filter element. The operation is simple, improving the safety and efficiency of waste filter element replacement.

[0024] 2. By setting up a slide rail and a slide rod, the gravity of the sliding seat drives the drive component to operate under the special structure of the slide rail, eliminating the need for a complex electrical drive system and reducing the manufacturing cost and maintenance difficulty of the tool. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this application.

[0026] Figure 2 This is a schematic diagram of the structure of the sliding seat in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the driving component and the connector in the embodiments of this application.

[0028] Figure 4 This is a schematic diagram of the structure when the grab hook is open in the embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the structure when the grab hook is closed in the embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the internal structure of the slide in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Lifting rod; 2. Sliding seat; 3. Protective cylinder; 4. Slide rail; 41. First inclined groove; 42. Second inclined groove; 43. Snap-fit ​​groove; 431. Stop surface; 5. Connecting assembly; 51. Guide column; 52. Connecting seat; 53. Connecting bolt; 6. Sliding rod; 61. Receiving groove; 62. Counterweight flange; 7. Connecting frame; 71. Grab hook; 8. Drive assembly; 81. Guide seat; 82. Sliding pin; 83. Connecting rod; 831. Sliding groove; 9. Limiting assembly; 91. First stop; 92. Second stop. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0033] This application discloses a tool for remotely grabbing and releasing waste filter cartridges.

[0034] Reference Figure 1 and Figure 2 A waste filter cartridge remote grabbing and release tool includes a boom 1, on which a lifting ring is integrally formed to hook and cooperate with a crane wire rope. A sliding seat 2 is fixedly connected to the end of the boom 1 away from the lifting ring. The sliding seat 2 is U-shaped. A protective cylinder 3 is fixedly connected to the outer surface of the boom 1. The protective cylinder 3 covers the outer periphery of the sliding seat 2, thereby ensuring the smooth movement of the internal components of the sliding seat 2.

[0035] Reference Figure 2 and Figure 3 The inner sidewalls of the sliding seat 2 are provided with slide rails 4. The two slide rails 4 are detachably connected to the slide rods 6 through the connecting assembly 5. Specifically, the connecting assembly 5 includes a guide post 51 slidably connected inside the two slide rails 4. A connecting seat 52 is fixedly connected to the guide post 51. In this embodiment, the connecting seat 52 is U-shaped. The end of the slide rod 6 is inserted into the connecting seat 52 and detachably connected to the connecting seat 52 through the connecting bolt 53.

[0036] When the tool needs maintenance or repair, or when the corresponding slide rod 6 needs to be replaced to adapt to filter elements of different sizes and specifications, the connecting seat 52 and slide rod 6 can be separated simply by removing the connecting bolt 53. There is no need to disassemble the entire tool, which greatly simplifies the maintenance and replacement process and reduces the maintenance cost of the tool.

[0037] Reference Figure 4The slide 4 includes two first inclined grooves 41, two second inclined grooves 42 and a snap-fit ​​groove 43. The two first inclined grooves 41 and the two second inclined grooves 42 are symmetrical about the center line of the sliding seat 2. The snap-fit ​​groove 43 is connected to the ends of the two second inclined grooves 42. The first inclined grooves 41 and the two inclined grooves 42 are both inclined from bottom to top along a direction away from the center line of the sliding seat 2.

[0038] Reference Figure 3 , Figure 4 and Figure 5 The end of the slide rod 6 away from the connecting seat 52 is tapered. The tapered structure guides the slide rod 6 to be inserted into the mounting hole of the filter element. The slide rod 6 is provided with a receiving groove 61. Two connecting frames 7 are hinged to the inner side wall of the receiving groove 61. In this embodiment, the connecting frames 7 are L-shaped. The same section of the connecting frames 7 is fixedly connected with a hook 71 for hooking the filter element. The slide rod 6 is provided with a drive assembly 8 that drives the two connecting frames 7 to rotate.

[0039] Reference Figure 3 , Figure 4 and Figure 5 A counterweight flange 62 is fixedly sleeved on the outer surface of the sliding rod. The diameter of the counterweight flange 62 is larger than the diameter of the filter element mounting hole. The drive assembly 8 includes a guide seat 81 fixedly connected to the bottom of the sliding seat 2 by multiple mounting bolts. The guide seat 81 is slidably sleeved on the outer surface of the sliding rod 6. Sliding pins 82 are installed at opposite ends of the guide seat 81. A connecting rod 83 is hinged to the end of each connecting frame 7 away from the grab hook 71. A sliding groove 831 is opened on the connecting rod 83 to slide with the sliding pin 82. The sliding groove 831 is inclined.

[0040] Reference Figure 4 and Figure 5 In the initial state, the two hooks 71 are closed and retracted inside the receiving groove 61, so as not to interfere with the normal insertion of the slide rod 6 into the mounting hole. The guide post 51 is stopped at the connection of the two first inclined grooves 41, and the two sliding pins 82 are stopped in the lower middle part of the sliding groove 831, with a gap between them and the bottom wall of the sliding groove 831. During operation, the two hooks 71 open to hook the filter element, the guide post 51 is stopped inside the snap-fit ​​groove 43, and the two sliding pins 82 are stopped on the top wall of the sliding groove 831.

[0041] Reference Figure 4 and Figure 5When replacing the filter element, the boom 1 is loaded onto the wire rope of the crane. When the crane moves the boom 1 to the top of the filter element to be replaced, the wire rope is released. Under the action of gravity, the boom 1 drives the slide rod 6 to insert into the filter element mounting hole. When the counterweight flange 62 abuts against the outer end face of the filter element, the slide rod 6 can no longer slide down. At this time, the sliding seat 2 moves down a certain distance under the action of gravity. The guide post 51 moves up along the first inclined groove 41 to the connection between the first inclined groove 41 and the second inclined groove 42. Then, under the guidance of the second inclined groove 42, the sliding seat 2 moves up relative to the guide post 51, causing the guide post 51 to transfer into the snap-fit ​​groove 43. The sliding seat 2 drives the sliding pin 82 to move to the top of the sliding groove 831. Since the sliding groove 831 is inclined, when the sliding pin 82 moves, it will drive the two connecting rods to rotate towards the direction close to the slide rod 6. The rotation of the connecting rods pulls the connecting frame 7 to rotate. The connecting frame 7 drives the two grab hooks 71 to open and hook the filter element.

[0042] After the fixing is completed, the crane lifts the wire rope and pulls the boom 1 upward. Since the sliding pin 82 abuts against the top of the sliding groove 831, the hook 71 keeps hooking the filter element. After the boom 1 moves the filter element to the designated position, the wire rope is released again to loosen it. At this time, the sliding seat 2 will move downward relative to the guide column 51 under its own gravity. The guide column 51 moves along the second inclined groove 42 to the connection of the two first inclined grooves 41. At the same time, the sliding pin 82 moves downward along the sliding groove 831. The sliding pin 82 pulls the two connecting rods 83 to rotate in the opposite direction. The connecting frame 7 drives the two hooks 71 to close and retract into the receiving groove 61. Finally, the wire rope is pulled up so that the boom 1 drives the sliding rod 6 to disengage from the filter element lifting hole. In this way, the filter element is replaced. The whole process is carried out with the help of the crane and the grabbing and releasing tools. There is no need for maintenance personnel to come into close contact with the radioactive filter element. The operation steps are simple and improve the safety and efficiency of the filter waste filter element replacement operation.

[0043] Reference Figure 6 To further limit the sliding trajectory of the guide post 51 within the slide rail 4, a stop surface 431 is provided on the inner side wall of the snap-fit ​​groove 43. The stop surface 431 is a vertical plane. Each slide rail 4 is provided with a limiting component 9. The limiting component 9 includes a first stop 91 and a second stop 92 rotatably connected inside the slide rail 4. The first stop 91 is located at the connection between the two inclined grooves, and the second stop 92 is located inside the snap-fit ​​groove 43. A return torsion spring (not shown in the figure) is sleeved on the rotation shaft of both the first stop 91 and the second stop 92. In the natural state of the return torsion spring, the protruding end of the second stop 92 faces the stop surface 431, and the protruding end of the first stop 91 faces the opposite direction to the second stop 92.

[0044] Reference Figure 6When the guide post 51 moves from the first inclined groove 41 to the second inclined groove 42, it can only enter the second inclined groove 42 counterclockwise due to the obstruction of the first stop 91. Then, the guide post 51 overcomes the elastic force of the reset torsion spring and pushes the second stop 92 to rotate into the locking groove 43, at which point the grab hook 71 opens. When the guide post 51 moves from the locking groove 43 to the second inclined groove 42, it can only enter the second inclined groove 42 clockwise due to the limitation of the second stop 92 and the stop surface 431. Then, the guide post 51 moves to the connection between the second inclined groove 42 and the first inclined groove 41, and overcomes the elastic force of the reset torsion spring to push the first stop 91 to rotate, thus successfully resetting to the connection between the two first inclined grooves 41. This restricts the sliding trajectory of the guide post 51 and ensures the smooth movement of the grab hook 71.

[0045] The implementation principle of the waste filter cartridge remote grabbing and releasing tool in this application embodiment is as follows: When replacing the filter cartridge, the lifting rod 1 is mounted on the steel wire rope of the crane. When the crane moves the lifting rod 1 above the filter cartridge to be replaced, the steel wire rope is released. Under the action of gravity, the lifting rod 1 drives the sliding rod 6 to insert into the filter cartridge mounting hole. When the counterweight flange 62 abuts against the outer end face of the filter cartridge, the sliding rod 6 can no longer slide downward. At this time, the sliding seat 2 moves downward a certain distance under the action of gravity, and the guide column 51 moves upward along the first inclined groove 41. The sliding seat 2 moves to the connection between the first inclined groove 41 and the second inclined groove 42. Then, guided by the second inclined groove 42, the sliding seat 2 moves upward relative to the guide post 51, causing the guide post 51 to transfer into the snap-fit ​​groove 43. The sliding seat 2 drives the sliding pin 82 to move to the top of the sliding groove 831. Since the sliding groove 831 is inclined, when the sliding pin 82 moves, it will drive the two connecting rods to rotate towards the direction close to the sliding rod 6. The rotation of the connecting rods pulls the connecting frame 7 to rotate. The connecting frame 7 drives the two hooks 71 to open and hook the filter element.

[0046] After the fixing is completed, the crane lifts the wire rope and pulls the boom 1 upward. Since the sliding pin 82 abuts against the top of the sliding groove 831, the hook 71 keeps hooking the filter element. After the boom 1 moves the filter element to the designated position, the wire rope is released again to loosen it. At this time, the sliding seat 2 will move downward relative to the guide column 51 under its own gravity. The guide column 51 moves along the second inclined groove 42 to the connection of the two first inclined grooves 41. At the same time, the sliding pin 82 moves downward along the sliding groove 831. The sliding pin 82 pulls the two connecting rods 83 to rotate in the opposite direction. The connecting frame 7 drives the two hooks 71 to close and retract into the receiving groove 61. Finally, the wire rope is pulled up so that the boom 1 drives the sliding rod 6 to disengage from the filter element lifting hole. In this way, the filter element is replaced. The whole process is carried out with the help of the crane and the grabbing and releasing tools. There is no need for maintenance personnel to come into close contact with the radioactive filter element. The operation steps are simple and improve the safety and efficiency of the filter waste filter element replacement operation.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A remote gripping and releasing tool for waste filter cartridges, characterized in that, The device includes a boom (1), a sliding seat (2) on the boom (1), a slide rail (4) inside the slide rail (2), a slide rod (6) slidably connected to the slide rail (4) via a connecting component (5), the slide rod (6) being inserted into the filter element mounting hole, a receiving groove (61) inside the slide rod (6), two connecting frames (7) hinged to the inner side wall of the receiving groove (61), and a grab hook (71) at the end of each of the two connecting frames (7). The slide rod (6) is provided with a counterweight flange (62) and a drive component (8). The counterweight flange (62) is fixedly sleeved on the outer periphery of the slide rod (6), and the drive component (8) drives the two connecting frames (7) to rotate.

2. The waste filter cartridge remote gripping and releasing tool according to claim 1, characterized in that, The drive assembly (8) includes a guide seat (81) fixedly disposed at the bottom end of the sliding seat (2). The guide seat (81) is slidably sleeved on the outer surface of the slide rod (6). Sliding pins (82) are provided on both sides of the guide seat (81). Each connecting frame (7) is hinged to a connecting rod (83) at the end away from the grab hook (71). A sliding groove (831) is provided on the connecting rod (83) to slide and cooperate with the sliding pin (82). The sliding groove (831) is inclined.

3. The waste filter cartridge remote gripping and releasing tool according to claim 1, characterized in that, The connecting assembly (5) includes a guide post (51) slidably disposed inside the slide rail (4), and a connecting seat (52) is provided on the guide post (51). The connecting seat (52) and the slide rod (6) are detachably connected by a connecting bolt (53).

4. The waste filter cartridge remote gripping and releasing tool according to claim 3, characterized in that, The slide (4) includes a first inclined groove (41) and a second inclined groove (42) that are interconnected. There are two symmetrically arranged first inclined grooves (41) and second inclined grooves (42). The first inclined grooves (41) and second inclined grooves (42) are inclined from bottom to top along the direction away from the axis of the sliding seat (2). The ends of the two second inclined grooves (42) are connected by a snap-fit ​​groove (43). Initially, the guide post (51) is set in the connecting part of the two first inclined grooves (41) and the two hooks (71) are in a closed state. During operation, the guide post (51) is set in the snap-fit ​​groove (43) and the two hooks (71) are in an open state.

5. The waste filter cartridge remote gripping and releasing tool according to claim 4, characterized in that, The snap-fit ​​groove (43) is provided with a stop surface (431), and the slide (4) is provided with a limiting component (9). The limiting component (9) and the stop surface (431) limit the guide post (51) from moving along the length trajectory of the slide (4) in a single direction.

6. The waste filter cartridge remote gripping and releasing tool according to claim 5, characterized in that, The limiting component (9) includes a first stop (91) and a second stop (92). The first stop (91) is rotatably disposed at the connection between the two first inclined grooves (41), and the second stop (92) is rotatably disposed inside the snap-fit ​​groove (43). A reset torsion spring is sleeved on the rotation shaft of both the first stop (91) and the second stop (92). In its natural state, the protruding end of the second stop (92) is disposed facing the stop surface (431), and the protruding end of the first stop (91) is disposed opposite to that of the second stop (92).

7. The waste filter cartridge remote gripping and releasing tool according to claim 1, characterized in that, A protective cylinder (3) is provided on the boom (1), and the protective cylinder (3) covers the outer periphery of the sliding seat (2).

8. The waste filter cartridge remote gripping and releasing tool according to claim 1, characterized in that, The bottom end of the slide bar (6) is tapered.

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