Filter element grabbing tool

Abstract

The present invention discloses a filter element grabbing tool, which belongs to the field of special auxiliary equipment. It comprises an upper base, a lower base, a combined hook, a group of symmetrically arranged connecting rods, a group of symmetrically arranged connecting plates, and a hook opening and closing adjustment mechanism; the hook opening and closing adjustment mechanism is fixedly connected to the upper base, and the lower part of the hook opening and closing adjustment mechanism can be inserted into the lower base and limited; when the lower part of the hook opening and closing adjustment mechanism is inserted into the lower base and limited, the combined hook is closed; when the lower part of the hook opening and closing adjustment mechanism is separated from the lower base, the combined hook is opened. The entire operation process of the filter element grabbing tool is convenient and flexible, does not require the operator to apply force and clamp separately, and is safe; during operation and use, the entire filter element grabbing tool and the filter element are always in the same straight line, stable and reliable.

Description

Technical Field

[0001] The invention relates to a filter element replacement tool, in particular to a filter element grabbing tool, belonging to the field of special auxiliary equipment. Background Art

[0002] In nuclear power plant radioactive water treatment systems, water filter cartridges are primarily used to remove colloid-based corrosion products and suspended solid particles from the water. They are crucial for ensuring stable plant operation. Filter cartridges are subject to service life limitations and require regular replacement. When replacing a filter cartridge, the one that has reached the end of its service life must be removed and replaced with a new one. Because filter cartridges contain significant amounts of radioactive components during use, exposure time and distance between operators and the filter should be minimized during replacement to ensure safety.

[0003] On April 13, 2011, Chinese invention patent application CN2010105586567 disclosed a tool for quickly replacing filter cartridges. The tool comprises a hook gripper, a gripper locking hinge, a handle, and a pull rod. A connecting rod is connected to the lower end of the pull rod. A gripper locking hinge is provided at the lower end of the connecting rod. The upper end of the gripper locking hinge is movably connected to the connecting rod. The middle portion of the gripper locking hinge is hinged to the connecting rod. The hook gripper is fixedly connected to the lower end of the gripper locking hinge. The handle is mounted on the connecting rod and moves up and down along the connecting rod. A transmission shaft is fixedly connected to the handle, acting on the hook gripper. A protrusion is provided on the transmission shaft at a position corresponding to the upper end of the gripper locking hinge. This protrusion acts on the upper end of the gripper locking hinge, causing the gripper locking hinge to rotate along the hinged position at the middle of the gripper locking hinge. The tool is quick, easy, and labor-saving to operate, thereby improving work efficiency and reducing operator exposure to harsh environments. However, during use, the tool requires manual force applied to the handle to pull the lever for grabbing and lifting. When the operator is far from the filter element, the lever needs to be long enough. This increased length also increases the tool's weight, undoubtedly increasing the operator's burden. Furthermore, the extended lever makes it difficult for the operator to quickly connect the tool to the filter element interface for grabbing, prolonging the exposure time of the discarded filter element. Furthermore, when operating the tool, the operator cannot ensure that the tool and the filter element interface are aligned, resulting in severe wear on the gripper, which significantly reduces the reliability and stability of the grab. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a filter element replacement tool that is flexible and convenient to operate and has stable and reliable gripping.

[0005] In order to solve the above technical problems, the present invention provides a filter element grabbing tool, which includes an upper base, a lower base, a combined hook, a group of symmetrically arranged connecting rods, a group of symmetrically arranged connecting plates and a hook opening and closing adjustment mechanism;

[0006] The middle part of the combined hook is hinged to the lower base, the upper part of the combined hook is hinged to the lower part of the connecting rod, and the upper part of the connecting rod is movably connected to the upper base;

[0007] The lower part of the connecting plate is fixedly connected to the lower base, and the upper part of the connecting plate is movably connected to the upper base;

[0008] The upper part of the connecting rod and the upper part of the connecting plate are both provided with openings for the upper base to slide up and down;

[0009] The hook opening and closing adjustment mechanism is fixedly connected to the upper base, and the lower part of the hook opening and closing adjustment mechanism can be inserted into the lower base and limited;

[0010] When the lower part of the hook opening and closing adjustment mechanism is inserted into the lower base and limited, the combined hook is closed;

[0011] When the lower portion of the hook opening and closing adjustment mechanism is separated from the lower base, the combined hook is opened.

[0012] In the present invention, the hook opening and closing adjustment mechanism includes a center positioning guide rod and a guide rod rotating mechanism, wherein the center positioning guide rod is connected to the guide rod rotating mechanism, and the guide rod rotating mechanism is connected to the upper base;

[0013] The guide rod rotating mechanism can drive the central positioning guide rod to rotate 90 degrees and position it every time it goes down and returns to its original position;

[0014] The lower part of the center positioning guide rod is provided with a limit block which can be inserted into the lower base and limit the position;

[0015] When the guide rod rotating mechanism moves downward, the limit block enters the lower base, and the guide rod of the upward center positioning guide rod rotates 90 degrees and the limit block is stuck in the lower base;

[0016] When the guide rod rotating mechanism moves downward again, the guide rod rotating mechanism drives the center positioning guide rod to rotate 90 degrees, and the guide rod rotating mechanism moves upward to drive the limit block to separate from the lower base.

[0017] In the present invention, the guide rod rotating mechanism includes an upper clutch gear and a lower clutch gear, and the upper clutch gear and the lower clutch gear are respectively provided with four ratchet teeth, and the tooth tips thereof are opposite to each other;

[0018] The positions of the upper clutch gear and the lower clutch gear are relatively fixed;

[0019] The lower portion of the center positioning guide rod passes through the lower clutch gear, and the upper portion is located between the upper clutch gear and the lower clutch gear;

[0020] The central positioning guide rod between the upper clutch gear and the lower clutch gear is provided with four guide limit teeth adapted to the ratchet teeth on the upper clutch gear and the lower clutch gear;

[0021] When the guide limit tooth contacts the ratchet on the upper clutch gear, the guide limit tooth gradually slides into the teeth of the upper clutch gear, and the center positioning guide rod rotates 90°;

[0022] When the guide limiting teeth come into contact with the ratchet teeth on the lower clutch gear, the guide limiting teeth gradually slide into the teeth space of the lower clutch gear, and the center positioning guide rod is positioned.

[0023] In the present invention, the guide rod rotating mechanism further comprises a guide cylinder, the upper clutch gear and the lower clutch gear are both mounted in the guide cylinder, and the position of the lower clutch gear can be adjusted and positioned.

[0024] In the present invention, a thread groove is provided in the guide cylinder, and the outer peripheries of the upper clutch gear and the lower clutch gear are provided with threads adapted to the thread groove in the guide cylinder;

[0025] Slots are formed between the threads, and limiting screw holes are provided at the positions corresponding to the slots.

[0026] In the present invention, there are multiple slots, which are evenly distributed along the circumference of the lower clutch gear.

[0027] In the present invention, a guide and positioning sleeve is provided on the outer side of the hook opening and closing adjustment mechanism, and the guide and positioning sleeve is fixedly connected to the connecting plate.

[0028] In the present invention, a flat adjustment plate is provided at the bottom of the lower base.

[0029] In the present invention, the combined hook comprises a first hook and a second hook of an "L"-shaped structure, which are arranged in opposite directions and hinged in the middle.

[0030] In the present invention, the first hook includes two hook teeth, a gap for accommodating the second hook is formed between the two hook teeth, and the second hook is arranged in the gap and is hinged to the first hook.

[0031] The beneficial effects of the present invention are as follows: (1) after the combined hook in a closed state is fully inserted into the opening on the filter element, the hook opening and closing adjustment mechanism is lifted upward, so that the lower part of the hook opening and closing adjustment mechanism is separated from the lower base; the hook opening and closing adjustment mechanism simultaneously drives the upper part of the combined hook to move upward synchronously through the connecting rod, opens the combined hook and grabs the filter element; when the filter element reaches the specified position, the hook opening and closing adjustment mechanism moves downward under the action of its own weight, and its lower part is inserted into the lower base and limited, while the connecting rod moves downward to drive the combined hook to close, and when the hook opening and closing adjustment mechanism is lifted again, since the hook is open at this time The lower part of the closing adjustment mechanism is limited in the lower base, and the hook opening and closing adjustment mechanism cannot move upward alone and drive the connecting rod. The combined hook remains in a closed state. The entire operation process is convenient and flexible, safe and reliable, and does not require the operator to apply force to clamp it separately; during operation, the entire filter element grabbing tool and the filter element are always in the same straight line, which is stable and reliable; (2) The control center positioning guide rod of the guide rod rotating mechanism is rotated 90 degrees alternately to achieve the separation of the center positioning guide rod and the lower base, thereby controlling the opening and closing of the combined hook, which is simple, reliable and stable; (3) The guide rod rotating mechanism The upper guide limit teeth cooperate with the upper clutch gear and the lower clutch gear to realize the rotation of the center positioning guide rod at a fixed angle in a cyclic and alternating manner without other power assistance, which is simple and efficient; (4) By adjusting and positioning the position of the lower clutch gear, the matching position between the center positioning guide rod and the lower base can be quickly adjusted, making assembly more convenient and quick; (5) Through the slots and threads, while realizing the free rotation of the lower clutch gear on the guide cylinder, the accurate positioning of the lower clutch gear can also be guaranteed; (6) There are multiple slots and they are evenly distributed along the circumference of the lower clutch gear, which can be The reliability and stability of the positioning of the lower clutch gear on the guide cylinder are ensured in one step; (7) The setting of the guide positioning sleeve can ensure that the operation of the hook opening and closing adjustment mechanism is more stable, and the overall strength of the filter element grabbing tool is improved; (8) The flat adjustment plate not only ensures the stability of the filter element grabbing tool after the combined hook is inserted into the filter element, but also can control the opening range of the combined hook by selecting the size of the flat adjustment plate to adapt to filter elements of different specifications; (9) The second hook adopts a double hook design and is hinged to the first hook, so that a three-claw grabbing of the filter element can be formed, ensuring a more stable and reliable grabbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a schematic diagram of the filter element grabbing tool structure;

[0034] Figure 2 This is a front view of the filter element grabbing tool structure;

[0035] Figure 3 Schematic diagram of the upper base structure;

[0036] Figure 4 Schematic diagram of the lower base structure, (a) Figure 1 , (b) schematic Figure 2 ;

[0037] Figure 5 Schematic diagram of the guide tube structure, (a) Figure 1 , (b) schematic Figure 2 ;

[0038] Figure 6 Schematic diagram of the upper clutch gear structure, (a) Figure 1 , (b) schematic Figure 2 ;

[0039] Figure 7 Schematic diagram of the lower clutch gear structure, (a) Figure 1 , (b) schematic Figure 2 ;

[0040] Figure 8 Schematic diagram of the center positioning guide rod structure, (a) connection state diagram, (b) explosion diagram;

[0041] Figure 9 Schematic diagram of the combined hook structure, (a) schematic diagram of the first hook structure, (b) schematic diagram of the second hook structure, (c) combined state diagram;

[0042] Figure 10 This is a schematic diagram of the assembly of the center positioning guide rod, upper clutch gear and lower clutch gear;

[0043] Figure 11 This is a schematic diagram of the coordination between the center positioning guide rod, upper clutch gear, lower clutch gear and lower base;

[0044] Figure 12 Schematic diagram of the plane adjustment plate structure;

[0045] Figure 13 This is a schematic structural diagram of a filter element grabbing tool according to another embodiment;

[0046] Figure 14 This is a front view of the filter element grabbing tool structure of another embodiment;

[0047] Figure 15 Schematic diagram of the filter element grabbing tool and the filter element grabbing.

[0048] In the figure: upper base 1, lower base 2, first hook 3, second hook 4, connecting rod 5, connecting plate 6, center positioning guide rod 7, upper clutch gear 8, lower clutch gear 9, guide cylinder 10, guide positioning sleeve 11, connecting block 12, slot 13, adjustment hole 14, ratchet 15, waist hole 16, plane adjustment plate 17, through hole 18, connecting rod connecting part 19, connecting plate connecting part 20, first through slot 2-1, second through slot 2-2, upper guide rod 7-1, lower guide rod 7-2, guide limit tooth 7-3, limit block 7-4, protrusion 7-5. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0052] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0054] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0055] like Figure 1 and 2 As shown, the filter element grabbing tool of this embodiment includes an upper base 1, a lower base 2, a first hook 3, a second hook 4, a connecting rod 5, a connecting plate 6, a center positioning guide rod 7, an upper clutch gear 8, a lower clutch gear 9, a guide cylinder 10 and a guide positioning sleeve 11.

[0056] like Figure 3 As shown, the upper base 1 is a square structure, and a connecting block 12 with an opening is provided on the top of the upper base 1. The connecting block 12 can be connected to other connecting components such as wire ropes, U-shaped hooks, etc. A threaded groove is provided at the bottom of the upper base 1 for connecting to the guide cylinder 10.

[0057] like Figure 5 As shown, the outer periphery of the guide cylinder 10 is provided with threads that connect to the bottom of the upper base 1. The inner periphery of the guide cylinder 10 is provided with upper and lower threaded grooves for connecting to the upper clutch gear 8 and the lower clutch gear 9. The upper clutch gear 8 is disposed and fixed to the upper portion of the guide cylinder 10, while the lower clutch gear 9 is disposed within the guide cylinder 10 and can be adjusted and positioned along the guide cylinder 10.

[0058] like Figure 6 As shown, the upper clutch gear 8 is a hollow ring structure. The outer periphery of the upper clutch gear 8 is provided with threads that mate with the internal thread grooves of the guide cylinder 10. A symmetrical slot 13 is provided in the threads of the upper clutch gear 8. A threaded hole is provided at the top of the upper clutch gear 8 corresponding to the slot 13. After adjusting the upper clutch gear 8 to the appropriate position, a screw is screwed into the threaded hole to secure the upper clutch gear 8, preventing it from rotating within the guide cylinder 10 during use.

[0059] Two adjustment holes 14 are symmetrically provided on the top of the upper clutch gear 8 . The adjustment holes 14 are used to insert a suitable tool to rotate and adjust the specific position of the upper clutch gear 8 in the guide cylinder 10 .

[0060] Four ratchet teeth 15 are provided along the circumferential direction at the lower portion of the upper clutch gear 8 , and spaces between adjacent ratchet teeth 15 are formed.

[0061] like Figure 7 As shown, the structure of the lower clutch gear 9 is similar to that of the upper clutch gear 8. The outer periphery of the lower clutch gear 9 is also provided with threads that mate with the internal thread grooves of the guide cylinder 10. A symmetrical slot 13 is also defined within the threads of the lower clutch gear 9. A threaded hole is also located at the bottom of the lower clutch gear 9, corresponding to slot 13. The functions of the threaded hole and slot 13 are similar to those of the upper clutch gear 8.

[0062] Two adjustment holes 14 are symmetrically provided at the bottom of the lower clutch gear 9 . The adjustment holes 14 are used to insert a suitable tool to rotate and adjust the specific position of the lower clutch gear 9 in the guide cylinder 10 .

[0063] Four ratchet teeth 15 are circumferentially arranged on the upper portion of the lower clutch gear 9, with spaces between adjacent ratchet teeth 15. The structure of the ratchet teeth 15 on the lower clutch gear 9 is slightly different from that on the upper clutch gear 8, and the ratchet teeth 15 on the lower clutch gear 9 are relatively shorter.

[0064] When the assembly is completed, the top of the ratchet teeth 15 of the lower clutch gear 9 and the bottom of the ratchet teeth 15 of the upper clutch gear 8 are aligned in sequence.

[0065] The center positioning guide rod 7 is in the shape of a circular long strip as a whole. The diameter of the center positioning guide rod 7 is slightly smaller than the inner diameter of the upper clutch gear 8 and the hollow portion of the upper clutch gear 8 to ensure that the center positioning guide rod 7 can slide freely up and down.

[0066] like Figure 8 As shown, in this embodiment, the center positioning guide rod 7 is divided into two parts, namely, an upper guide rod 7-1 and a lower guide rod 7-2. The bottom of the upper guide rod 7-1 is provided with a threaded hole, and the top of the lower guide rod 7-2 is provided with a thread that matches the threaded hole at the bottom of the upper guide rod 7-1. The upper guide rod 7-1 and the lower guide rod 7-2 are fixedly connected by a threaded pair.

[0067] The middle part of the upper guide rod 7-1 is provided with four guide limit teeth 7-3 along the circumferential direction. The structure of the guide limit teeth 7-3 is adapted to the tooth structure between the upper clutch gear 8 and the lower clutch gear 9. The guide limit teeth 7-3 are located between the upper clutch gear 8 and the lower clutch gear 9. Figure 10 shown.

[0068] When the center positioning guide rod 7 moves upward, after the top of the guide limiting tooth 7-3 contacts the lower end of the ratchet 15 on the upper clutch gear 8, the guide limiting tooth 7-3 gradually slides into the teeth space of the ratchet 15 on the upper clutch gear 8, and the center positioning guide rod 7 itself rotates 90 degrees. When the center positioning guide rod 7 moves downward, the lower part of the guide limiting tooth 7-3 automatically slides into the teeth space of the ratchet 15 on the lower clutch gear 9 under the action of its own weight. The lower clutch gear 9 limits the rotation of the center positioning guide rod 7, thereby achieving the positioning of the center positioning guide rod 7.

[0069] A stop block 7-4 is provided at the bottom of the lower guide rod 7-2, and a protrusion 7-5 is provided at the bottom of the stop block 7-4. Both the stop block 7-4 and the protrusion 7-5 are rounded. The protrusion 7-5 is used to facilitate lifting the entire center positioning guide rod 7.

[0070] like Figure 4 As shown, the upper half of the lower base 2 is a square structure, while the lower half is an inverted trapezoidal structure. A first through slot 2-1 is defined within the square structure. The top of the first through slot 2-1 is open, with two inwardly extending, facing steps formed on either side. The gap between the two steps is slightly larger than the width of the upper limit block 7-4 on the central positioning guide rod 7 to ensure proper entry and exit of the limit block 7-4.

[0071] The width and length of the first through slot 2-1 are both greater than the length of the stopper 7-4 to ensure that the stopper 7-4 can rotate freely in the first through slot 2-1. The height of the first through slot 2-1 is slightly greater than the distance between the top surface of the stopper 7-4 and the bottom surface of the protrusion 7-5.

[0072] The bottom of the inverted trapezoidal structure in the lower half of the lower base 2 is provided with a second through-slot 2-2, which intersects the first through-slot 2-1 at a 90-degree angle. The bottom of the second through-slot 2-2 is open, and the width of the second through-slot 2-2 is slightly larger than the thickness of the first hook 3 and the second hook 4. Holes are opened on the base on both sides of the second through-slot 2-2 for hinged connection between the lower base 2 and the first hook 3 and the second hook 4.

[0073] like Figure 9 As shown, the first hook 3 is similar to an "L"-shaped structure, with a bent hook at one end and holes at the other end and the middle bend.

[0074] The second hook 4 is also similar to an L-shaped structure, with a hook at one end and holes at the other end and the middle bend. The second hook 4 has two hook parts, and the gap between the two hook parts is slightly larger than the thickness of the first hook 3.

[0075] During assembly, the first hook 3 and the second hook 4 are positioned in opposite directions, with their midsections hinged to the lower base 2 via a pivot. The first and second hooks 3 and 4 can rotate relative to the lower base 2 along the axis of the second through-slot 2-2, ensuring stability during use. When the first and second hooks 3 and 4 are extended outward, they form a three-claw structure and can be closed inward to form a single unit.

[0076] like Figure 1 and 9 As shown, the openings at the distal ends of the first and second hooks 3 and 4 are hinged to the lower portions of two symmetrical connecting rods 5 via respective rotating shafts. The upper portions of the connecting rods 5 are provided with elongated waist holes 16 along their lengths. The waist holes 16 at the upper portions of the two connecting rods 5 are hinged to connecting rod connecting portions 19 on opposite sides of the upper base 1 via respective rotating shafts, which are capable of sliding relative to the waist holes 16.

[0077] like Figure 1 and 12 As shown, a flat adjustment plate 17 is fixedly connected to the bottom of the lower base 2, and a square through-hole 18 is formed in the flat adjustment plate 17. The curved hooks of the first and second hooks 3 and 4 extend through the flat adjustment plate 17. By adjusting the size of the through-hole 18, the maximum opening range of the first and second hooks 3 and 4 can be controlled to accommodate filter cartridges of different sizes. Furthermore, when the first and second hooks 3 and 4 are inserted into the filter cartridge, the flat adjustment plate 17 ensures more stable contact between the entire filter cartridge gripping tool and the filter cartridge to be gripped.

[0078] Connecting plates 6 are connected to the two opposite sides of the upper half of the lower base 2 (the two end faces of the first through groove 2-1), and the two connecting plates 6 are symmetrically arranged. Like the aforementioned connecting rod 5, the upper parts of the two connecting plates 6 are both provided with long strip-shaped waist holes 16 along the length direction. Connecting plate connecting parts 20 are respectively provided on the opposite sides of the upper base 1. The two connecting plate connecting parts 20 and the two connecting rod connecting parts 19 are symmetrically arranged on the four side faces of the upper base 1. Among them, the connecting plate connecting part 20 is connected to the upper base 1 through a threaded pair, and the two connecting rod connecting parts 19 are welded to the upper base 1. The connecting plate connecting part 20 is inserted into the waist hole 16 on the upper part of the connecting plate 6 and fixed by a gasket and a pin. In this way, the upper base 1 can slide up and down along the waist hole 16 on the upper part of the connecting rod 5 and the waist hole 16 on the upper part of the connecting plate 6.

[0079] like Figure 1 As shown, a guide sleeve 11 is mounted on the outer surface of the guide cylinder 10. The two sides of the guide sleeve 11 are connected to the two connecting plates 6. The guide cylinder 10 can slide up and down along the guide sleeve 11. The guide sleeve 11 not only improves the strength of the entire filter element gripping tool, but also ensures the stability of the upward and downward movement of the center positioning guide rod 7.

[0080] The assembly process of this embodiment is as follows:

[0081] Connect the upper guide rod 7-1 of the center positioning guide rod 7 through the lower clutch gear 9 and connect it to the lower guide rod 7-2;

[0082] Insert the center positioning guide rod 7 into the guide cylinder 10, then rotate the upper clutch gear 8 to a suitable position in the guide cylinder 10 and screw the screws into the threaded holes to fix it, and then connect the guide cylinder 10 to the upper base 1 through the threaded pair;

[0083] After rotating the lower clutch gear 9 to a suitable position in the guide cylinder 10, screw the screw into the threaded hole to fix it;

[0084] Put the guide sleeve 11 on the guide cylinder 10;

[0085] The first hook 3 and the second hook 4 are arranged in opposite directions at the second through groove 2-2 and connected to the lower base 2 through the rotating shaft. The lower parts of the first hook 3 and the second hook 4 pass through the through hole 18 on the plane adjustment plate.

[0086] Insert the lower portion of the center positioning guide rod 7 into the first through slot 2-1 on the lower base 2. After insertion, the stopper on the center positioning guide rod 7 is located in the first through slot 2-1.

[0087] Connect the lower parts of the two connecting rods 5 to the openings at the distal ends of the first hook 3 and the second hook 4 respectively through the rotating shaft, and use gaskets and latches for auxiliary purposes; insert the upper waist holes 16 of the two connecting rods 5 into the connecting rod connecting parts 19 on the opposite sides of the upper base 1, insert the rotating shaft, and use gaskets and latches to achieve connection;

[0088] The bottoms of the two connecting plates 6 are fixedly connected to the lower base 2 by screws respectively, the upper waist holes 16 of the two connecting plates 6 are inserted into the connecting plate connecting parts 20 on the opposite sides of the upper base 1, and then the gaskets are inserted into the connecting plate connecting parts 20 and connected with the pins; the middle parts of the two connecting plates 6 are fixedly connected here by screws and the guide positioning sleeves 11 to complete the assembly.

[0089] After assembly is complete, it is necessary to ensure that after each 90° rotation of the center positioning guide rod 7, the first through slot 2-1 on the lower base 2 can alternately limit / release the limit block on the center positioning guide rod 7. If this cannot be achieved, the position of the lower clutch gear 9 in the guide cylinder 10 needs to be adjusted until the above conditions are met.

[0090] The assembly process disclosed in this embodiment has no specific order. As long as the assembly can be completed, those skilled in the art should know that they can adjust the assembly steps on their own.

[0091] The assembly process of this embodiment is as follows: the center positioning guide rod 7 is passed through the bottom of the lower clutch gear 9, and then the guide limit teeth 7-3 are fixedly set on the upper part of the center positioning guide rod 7. The other steps are the same as the previous embodiment.

[0092] The working process of the technical solution of the present invention is as follows: the combined hook consisting of the first hook 3 and the second hook 4 of the filter element grabbing tool is inserted into the opening on the filter element to be grabbed in the closed state. Under the action of its own weight, the upper base 1, the center positioning guide rod 7, the upper clutch gear 8, the lower clutch gear 9, and the guide cylinder 10 of the filter element grabbing tool all move downward. At this time, after the guide limit tooth 7-3 on the center positioning guide rod 7 contacts the ratchet 15 on the upper clutch gear 8, the guide limit tooth 7-3 gradually slides into the teeth of the upper clutch gear 8. After the center positioning guide rod 7 rotates 90°, the lower clutch The ratchet 15 on the gear 9 is limited. At this time, the length direction of the limit block 7-4 at the bottom of the center positioning guide rod 7 is parallel to the gap between the two steps on the lower base 2. After the filter element grabbing tool is pulled upward as a whole, the limit block at the bottom of the center positioning guide rod 7 is separated from the lower base 2, and the upper base 1 drives the distal ends of the first hook 3 and the second hook 4 upward through the two connecting rods 5, thereby moving the first hook 3 and the second hook 4 to rotate outward at the lower end and then open to form a three-claw structure, hooking the opening on the filter element, and then the filter element grabbing tool can be continued to be lifted to remove the filter element. Figure 15 As shown (the dotted part in the figure is the filter element).

[0093] When the filter element moves to a suitable position, put down the filter element grabbing tool. Under the action of its own weight, the upper base 1, the center positioning guide rod 7, the upper clutch gear 8, the lower clutch gear 9, and the guide cylinder 10 all move downward. At this time, the guide limit tooth 7-3 on the center positioning guide rod 7 is connected with the ratchet 15 on the upper clutch gear 8 again, and the guide limit tooth 7-3 gradually slides into the teeth space of the upper clutch gear 8. The center positioning guide rod 7 rotates 90° and is limited by the ratchet 15 on the lower clutch gear 9. At this time, the length direction of the limit block 7-4 at the bottom of the center positioning guide rod 7 is 90° cross-shaped with the gap between the two steps on the lower base 2. The two steps limit the upward movement of the limit block 7-4. Figure 11 As shown; then pull the filter element grabbing tool upward as a whole. At this time, the limit block at the bottom of the central positioning guide rod 7 drives the lower base 2 upward. While the lower base 2 moves upward, it also drives the middle part of the first hook 3 and the second hook 4 upward. The distal ends of the first hook 3 and the second hook 4 are automatically pressed down under the action of their own weight and the weight of the connecting rod 5, so that the first hook 3 and the second hook 4 are rotated inward at the lower end and then closed. Then, the filter element grabbing tool is extracted to realize the separation between the filter element grabbing tool and the filter element.

[0094] like Figure 13 and 14 As shown, in another embodiment, a connection block 12 with an opening is provided on the top of the upper base 1, and the connection block 12 can be connected to other components such as a wire rope.

[0095] The center positioning guide rod 7 of this embodiment is an integrated structure. Four guide limit teeth are provided on the upper part of the center positioning guide rod 7 along the circumferential direction. The structure of the guide limit teeth is adapted to the inter-tooth structure of the upper clutch gear and the lower clutch gear. The guide limit teeth are located between the upper clutch gear and the lower clutch gear.

[0096] A square stopper is provided at the bottom of the center positioning guide rod 7, and a protrusion is provided at the bottom of the stopper. Both the stopper and the protrusion are rounded. The structure of other parts is the same as that of the previous embodiment.

[0097] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

[0098] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such herein, will not be interpreted in an idealized or overly formal sense.

[0099] Based on the above-described preferred embodiments of the present invention and the above-described inventive content, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of the present invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A filter element grabbing tool, characterized by: It includes an upper base, a lower base, a combined hook, a group of symmetrically arranged connecting rods, a group of symmetrically arranged connecting plates and a hook opening and closing adjustment mechanism; The middle part of the combined hook is hinged to the lower base, the upper part of the combined hook is hinged to the lower part of the connecting rod, and the upper part of the connecting rod is movably connected to the upper base; The lower part of the connecting plate is fixedly connected to the lower base, and the upper part of the connecting plate is movably connected to the upper base; The upper part of the connecting rod and the upper part of the connecting plate are both provided with openings for the upper base to slide up and down; The hook opening and closing adjustment mechanism is fixedly connected to the upper base, and the lower part of the hook opening and closing adjustment mechanism can be inserted into the lower base and limited; When the lower part of the hook opening and closing adjustment mechanism is inserted into the lower base and limited, the combined hook is closed; When the lower portion of the hook opening and closing adjustment mechanism is separated from the lower base, the combined hook is opened; The hook opening and closing adjustment mechanism includes a center positioning guide rod and a guide rod rotating mechanism, wherein the center positioning guide rod is connected to the guide rod rotating mechanism, and the guide rod rotating mechanism is connected to the upper base; The guide rod rotating mechanism can drive the central positioning guide rod to rotate 90 degrees and position it every time it goes down and returns to its original position; The lower part of the center positioning guide rod is provided with a limit block which can be inserted into the lower base and limit the position; When the guide rod rotating mechanism moves downward, the limit block enters the lower base, and the guide rod of the upward center positioning guide rod rotates 90 degrees and the limit block is stuck in the lower base; When the guide rod rotating mechanism moves downward again, the guide rod rotating mechanism drives the center positioning guide rod to rotate 90 degrees, and the guide rod rotating mechanism moves upward to drive the limit block to separate from the lower base; A guide sleeve is provided on the outside of the hook opening and closing adjustment mechanism, and the guide sleeve is fixedly connected to the connecting plate; A flat adjustment plate is provided at the bottom of the lower base.

2. The filter element grabbing tool according to claim 1, characterized in that: The guide rod rotating mechanism includes an upper clutch gear and a lower clutch gear, and the upper clutch gear and the lower clutch gear are respectively provided with four ratchet teeth, and the tooth tips thereof are opposite to each other; The positions of the upper clutch gear and the lower clutch gear are relatively fixed; The lower portion of the center positioning guide rod passes through the lower clutch gear, and the upper portion is located between the upper clutch gear and the lower clutch gear; The central positioning guide rod between the upper clutch gear and the lower clutch gear is provided with four guide limit teeth adapted to the ratchet teeth on the upper clutch gear and the lower clutch gear; When the guide limit tooth contacts the ratchet on the upper clutch gear, the guide limit tooth gradually slides into the teeth of the upper clutch gear, and the center positioning guide rod rotates 90°; When the guide limiting teeth come into contact with the ratchet teeth on the lower clutch gear, the guide limiting teeth gradually slide into the teeth space of the lower clutch gear, and the center positioning guide rod is positioned.

3. The filter element grabbing tool according to claim 2, characterized in that: The guide rod rotating mechanism further comprises a guide cylinder, in which the upper clutch gear and the lower clutch gear are both mounted, and the position of the lower clutch gear can be adjusted and positioned.

4. The filter element grabbing tool according to claim 3, characterized in that: The guide cylinder is provided with a thread groove, and the outer peripheries of the upper clutch gear and the lower clutch gear are both provided with threads adapted to the thread groove in the guide cylinder; Slots are provided between some of the threads, and limiting screw holes are provided at the positions corresponding to the slots.

5. The filter element grabbing tool according to claim 4, characterized in that: There are multiple slots, which are evenly distributed along the circumference of the lower clutch gear.

6. The filter element grabbing tool according to any one of claims 1 to 5, characterized in that: The combined hook comprises a first hook and a second hook of an "L"-shaped structure, which are arranged in opposite directions and hinged in the middle.

7. The filter element grabbing tool according to claim 6, characterized in that: The first hook includes two hook teeth, and a gap for accommodating the second hook is formed between the two hook teeth. The second hook is arranged in the gap and is hinged to the first hook.

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