Stainless steel nut anti-drop cup

Abstract

The utility model discloses a stainless steel nut anti -drop cup for the maintenance of filter separator, which is internally provided with a plurality of filter cores, and the filter core is provided with a mounting pull rod and a mounting nut, comprising a top opening protective cover body; the bottom of the protective cover body is provided with a mounting hole matched with the outer diameter of the mounting nut; the utility model cooperates the mounting hole of device bottom and elastic card piece, makes the mounting nut and mounting pull rod pass, and then the elastic card piece rebounds and clamps in the mounting pull rod, and the operator uses the tool to unscrew and removes the mounting nut, in this process, even if the mounting nut is dropped due to any reason, the dropped mounting nut will directly contact the elastic card piece and the inner cavity of the protective cover body, the mounting nut will be completely blocked by the elastic card piece, and be safely received in the containing cavity of the protective cover body, thereby effectively avoiding the risk of falling into the filter bottom.

Description

Technical Field

[0001] This utility model belongs to the field of auxiliary technology for filter separator maintenance, and specifically relates to a stainless steel nut to prevent the cup from falling off. Background Technology

[0002] In industries such as petrochemicals and aviation fuel, filters are crucial equipment for ensuring fuel cleanliness and removing moisture and impurities. Taking aviation kerosene filtration systems as an example, to ensure fuel supply safety, aviation kerosene filters must be regularly disassembled, inspected, and maintained according to relevant operating procedures (such as MH6020) and internal management regulations. The core of this maintenance work includes checking the cleanliness of the filter housing, the integrity of the filter element surface, and whether the accessories are damaged, thereby determining whether the filter element needs to be replaced or cleaned.

[0003] When performing disassembly and inspection, it is usually necessary to first remove the mounting nuts used to fasten the filter element cap. However, the existing maintenance procedures have serious safety hazards and operational difficulties. First, many industrial filters, especially aviation kerosene filters, have a deep and narrow internal structure, which can be more than two meters deep, and the internal space is small. When removing the mounting nuts located deep inside, due to the limited operating space, the nuts can easily slip out of the operator's hands and fall to the bottom of the filter if the operator is not careful.

[0004] If a nut falls off, it will not only severely slow down the work progress and increase the difficulty of the work due to the difficulty of retrieval, but will also cause a series of serious consequences. If the fallen nut cannot be successfully retrieved, it will remain in the filter as a foreign object. During the subsequent transport of aviation kerosene, the high-speed flow of oil will cause the nut to roll and churn inside the filter. The moving nut will collide with and damage the delicate filter element, causing the filter to fail and affecting the quality of the oil. The collision between the metal nut and the metal inner wall of the filter can easily generate sparks. In the confined environment filled with aviation kerosene and gas, once a spark occurs, there is an extremely high risk of combustion or even explosion, posing a huge threat to personnel and equipment property.

[0005] Therefore, there is an urgent need in the existing technology for an auxiliary tool that can effectively solve the problem of nuts falling off during the disassembly, inspection and maintenance of filters, so as to improve work efficiency and convenience, and fundamentally eliminate the major safety hazards caused by fasteners falling off. Utility Model Content

[0006] The present invention aims to provide a stainless steel nut to prevent the cup from falling off, thereby solving the technical problem in the prior art that there is a lack of an effective auxiliary means to prevent the accidental falling of fasteners such as nuts when inspecting filters with narrow internal spaces.

[0007] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a stainless steel nut anti-drop cup, used to prevent the mounting nut from falling off when maintaining a filter element with a mounting rod and a mounting nut, including a protective cover with a top opening; the bottom of the protective cover has a mounting hole matching the outer diameter of the mounting nut; the bottom of the protective cover is provided with a wire hole cover structure, the wire hole cover structure includes an elastic clip, the elastic clip covers the mounting hole, and the elastic clip forms an elastic central hole at the center of the mounting hole; the diameter of the elastic central hole is smaller than the outer diameter of the mounting nut.

[0008] Furthermore, the wire hole cover structure also includes a mounting ring, and the elastic clip is disposed on the mounting ring.

[0009] Furthermore, the elastic clip is an integrally formed elastic diaphragm with multiple slits radially distributed from the center to the periphery to form multiple elastic parts.

[0010] Furthermore, the mounting ring is detachably fixed to the bottom of the protective cover by a fastening structure.

[0011] Furthermore, the fastening structure includes at least two locking bolts and locking nuts that cooperate with the locking bolts; the locking bolts are fixed on the mounting ring, and the bottom of the protective cover has through holes corresponding to the locking bolts; after the locking bolts pass through the corresponding through holes in sequence, the mounting ring is locked and fixed by the locking nuts from the inner cavity of the protective cover to the locking bolts.

[0012] Furthermore, the filter separator filter element specifically includes a pressure cap disposed on the filter element, the mounting rod and the mounting nut all disposed on the pressure cap, and a conical pad disposed on the pressure cap.

[0013] Furthermore, the bottom of the protective cover is cup-shaped.

[0014] Furthermore, the protective cover is made of stainless steel.

[0015] Furthermore, the top outer edge of the protective cover is folded outward to form a flange that is easy to hold.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model aligns the mounting hole at the bottom of the protective cover with the mounting nut located on the pressure cap. The operator applies downward force, causing the protective cover to be fitted over the mounting nut. During this process, the elastic center hole of the elastic clip deforms, allowing the mounting nut to pass smoothly through, and the mounting rod to pass through. Subsequently, the elastic clip uses its restoring force to tightly clamp the outer periphery of the mounting rod. The operator uses tools to loosen and remove the mounting nut. Even if the mounting nut falls out for any reason during this process, the fallen nut will directly contact the elastic clip below and the inner cavity of the protective cover, and the mounting nut will be held in place by the elastic clip. Completely blocked and safely contained within the protective enclosure, the risk of the nut falling into the bottom of the filter is effectively avoided. When maintenance is completed and the nut needs to be reinstalled, the operator can directly remove the nut from the enclosure. This reliably catches the nut that may accidentally fall during disassembly, preventing it from falling into the filter. It also avoids the safety risks associated with operators having to lean into narrow, dangerous spaces to retrieve foreign objects, and prevents the nut from damaging the filter element or even generating sparks during subsequent oil transportation, which could lead to an explosion in flammable and explosive environments such as aviation kerosene. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 A schematic diagram illustrating the application of a stainless steel nut anti-drop cup in the maintenance of a separator filter element; Figure 2 This is a schematic diagram of the structure of a separator filter element without the stainless steel nut to prevent the cup from falling off. Figure 3 A schematic diagram of a stainless steel nut designed to prevent the cup from falling off; Figure 4 A bottom view schematic diagram of a stainless steel nut structure designed to prevent the cup from falling off; Figure 5 A bottom view schematic diagram of a stainless steel nut structure designed to prevent the cup from falling off; Figure 6 This is a top view schematic diagram of the separator and its filter element; Figure 7 This is a schematic diagram of the separator filter cap in the locked state. Figure 8 This is a schematic diagram of the bottom and elastic central hole of a protective cover for preventing stainless steel nuts from falling off.

[0019] In the diagram: 1. Pressure cap; 2. Filter element; 3. Conical pad; 4. Mounting rod; 5. Mounting nut; 6. Protective cover; 7. Mounting hole; 8. Mounting ring; 9. Elastic clip; 10. Locking bolt; 11. Locking nut; 12. Elastic center hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The present invention will be further described in detail below with reference to the embodiments.

[0022] Please refer to the attached diagram in the instruction manual. Figures 1-8 This embodiment discloses a stainless steel nut to prevent the cup from falling off, used for the maintenance of a filter separator. The filter separator contains multiple filter elements 2, and each filter element 2 is equipped with a mounting rod 4 and a mounting nut 5. Figure 2 As shown, the separation filter to be maintained is a mature existing technology. The separation filter typically includes a filter element 2, with a pressure cap 1 on top of the filter element 2. The pressure cap 1 is equipped with a mounting rod 4 and a mounting nut 5 for fastening. The mounting nut 5 is threaded to the mounting rod 4. The pressure cap 1 is also equipped with a conical pad 3. In order to ensure the pressure cap 1 is locked, the mounting nut 5 needs to be turned so that it moves along the surface of the mounting rod 4 toward the conical pad 3 and contacts the surface of the conical pad 3. Before the mounting nut 5 needs to be removed, it needs to be turned in advance so that it moves away from the conical pad 3 and disengages from the conical pad 3.

[0023] As shown in the attached diagram of the instruction manual. Figure 1 and accompanying diagrams Figure 3As shown, a stainless steel nut anti-drop cup includes a protective cover 6 with a top opening. The protective cover 6 is a cup-shaped structure with a top opening, and its entire body is made of stainless steel, which has good durability and corrosion resistance. The protective cover 6 has a bottom and a side wall integrally extending upward from the bottom. The side wall and the bottom together form a receiving cavity for catching the nut 5 if it falls off. To facilitate handheld operation, the outer edge of the top of the protective cover 6 can be folded outward to form a flange. The bottom of the protective cover 6 has a mounting hole 7 that matches the outer diameter of the mounting nut 5, allowing the protective cover 6 to be fitted onto the mounting nut 5. This ensures that when installing the device, the entire protective cover 6 can be smoothly inserted from above the mounting nut 5 until the bottom of the cover is close to the surface of the pressure cap 1. The bottom of the protective cover 6 is provided with a wire hole cover structure, which includes an elastic clip 9, which is located at the bottom of the protective cover 6 to cover the mounting hole 7 and has an elastic central hole 12. The diameter of the elastic central hole 12 in its natural state is smaller than the outer diameter of the mounting nut 5. The material properties of the elastic clip 9 are suitable for elastic deformation under force, thereby allowing the slightly larger diameter mounting rod 4 to pass through, and after passing through, using its elastic restoring force to clamp the outer periphery of the mounting rod 4.

[0024] The diameter of the elastic center hole 12 is smaller than the outer diameter of the mounting nut 5, and it is suitable for the mounting rod 4 to pass through after elastic deformation. Thus, when the mounting nut 5 is detached from the mounting rod 4, the elastic clip 9 can block the mounting nut 5 and receive it in the inner cavity of the protective cover 6.

[0025] In a preferred embodiment, as shown in the accompanying drawings, Figure 4 As shown, the wire hole cover structure also includes a mounting ring 8 and an elastic clip 9 disposed on the mounting ring 8. The elastic clip 9 is an integrally formed elastic diaphragm. The elastic diaphragm has multiple slits radially distributed from the center to the periphery to form multiple elastic parts. The inner ends of the multiple elastic parts are in contact to avoid the diameter of the elastic center hole being too large. The multiple slits and materials ensure that the multiple elastic parts can elastically deform when subjected to force, thereby allowing the slightly larger diameter mounting rod 4 to pass through. After passing through, the elastic restoring force is used to clamp the outer periphery of the mounting rod 4.

[0026] In a preferred embodiment, to achieve the detachable installation of the wire hole cover structure, an installation ring 8 is detachably fixed to the bottom of the protective cover 6 by a fastening structure; the fastening structure includes at least two locking bolts 10 and a locking nut 11 that cooperates with the locking bolts 10; the locking bolts 10 are fixed on the installation ring 8, and the bottom of the protective cover 6 has through holes corresponding to the locking bolts 10; after the locking bolts 10 pass through the corresponding through holes in sequence, the installation ring 8 is locked and fixed by the locking nut 11 connecting to the locking bolts 10 from the inner cavity of the protective cover 6.

[0027] During installation, the locking bolt 10 is passed through the through hole and then locked in place using the locking nut 11 from inside the receiving cavity of the protective cover 6. This detachable design facilitates the replacement of the elastic clip 9 or the replacement of elastic clips 9 of different specifications, thereby making it convenient to replace and maintain the wire hole cover structure.

[0028] Working principle: Before removing the mounting nut 5 from the filter, the operator first holds the device and aligns the mounting hole 7 at the bottom of the device with the mounting nut 5 located on the pressure cap 1. The operator applies downward force, causing the protective cover 6 to fit over the mounting nut 5. During this process, the elastic center hole 12 of the elastic clip 9 deforms, allowing the mounting hole 7 to pass smoothly through the mounting nut 5. The elastic clip 9, located at the center, contacts the mounting pull rod 4, which passes through. Subsequently, the elastic clip 9 uses its restoring force to tightly clamp the outer periphery of the mounting pull rod 4. The operator then uses tools to loosen and remove the mounting nut 5. During this process, even if the mounting nut 5 is damaged due to... If it slips out of your hand for any reason, it will only fall downwards. The falling mounting nut 5 will directly contact the elastic clip 9 below and the inner cavity of the protective cover 6. Since the outer diameter of the mounting nut 5 is much larger than the diameter of the elastic center hole 12 of the elastic clip 9, the mounting nut 5 will be completely blocked by the elastic clip 9 and safely received in the receiving cavity of the protective cover 6, thus effectively avoiding the risk of it falling to the bottom of the filter. When the maintenance work is completed and the mounting nut 5 needs to be reinstalled, the operator can directly take the mounting nut 5 out of the receiving cavity and, guided by this device, conveniently align it with the mounting rod 4 for installation, which also improves work efficiency.

[0029] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel nut for preventing cup loss, used for the maintenance of a filter separator, wherein the filter separator has multiple filter elements (2) inside, and each filter element (2) is provided with a mounting rod (4) and a mounting nut (5), characterized in that: The protective cover (6) includes a top-opening protective cover body (6); the bottom of the protective cover body (6) is provided with a mounting hole (7) that matches the outer diameter of the mounting nut (5); the bottom of the protective cover body (6) is provided with a wire hole cover structure, the wire hole cover structure includes an elastic clip (9), the elastic clip (9) covers the mounting hole (7), and the elastic clip is located at the center of the mounting hole (7) to form an elastic center hole (12); the diameter of the elastic center hole (12) is smaller than the outer diameter of the mounting nut (5).

2. The stainless steel nut anti-drop cup according to claim 1, characterized in that: The wire hole cover structure also includes a mounting ring (8), and the elastic clip (9) is disposed on the mounting ring (8).

3. The stainless steel nut anti-drop cup according to claim 2, characterized in that, The elastic clip (9) is an integrally formed elastic diaphragm with multiple slits radiating outward from the center to form multiple elastic parts.

4. The stainless steel nut anti-drop cup according to claim 3, characterized in that: The mounting ring (8) is detachably fixed to the bottom of the protective cover (6) by a fastening structure.

5. A stainless steel nut with anti-drop cup according to claim 4, characterized in that: The fastening structure includes at least two locking bolts (10) and a locking nut (11) that cooperates with the locking bolts (10); the locking bolts (10) are fixed on the mounting ring (8), and the bottom of the protective cover (6) is provided with a through hole corresponding to the locking bolts (10); after the locking bolts (10) pass through the corresponding through holes in sequence, the mounting ring (8) is locked and fixed by the locking nut (11) from the inner cavity of the protective cover (6) to the locking bolts (10).

6. The stainless steel nut anti-drop cup according to claim 1, characterized in that: The filter separator filter element specifically includes a pressure cap (1) disposed on the filter element (2), the mounting rod (4) and the mounting nut (5) disposed on the pressure cap (1) and a conical pad (3) disposed on the pressure cap (1).

7. The stainless steel nut anti-drop cup according to claim 1, characterized in that: The bottom of the protective cover (6) is cup-shaped.

8. The stainless steel nut anti-drop cup according to claim 1, characterized in that: The protective cover (6) is made of stainless steel.

9. A stainless steel nut with anti-drop cup according to claim 1, characterized in that: The top outer edge of the protective cover (6) is folded outward to form a flange that is easy to hold.

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