High-temperature-resistant and tri-proof mechanical indicator

Abstract

The utility model belongs to the aircraft fuel system technical field, especially relates to a high temperature resistant and three-proof mechanical indicator, including indicator housing, piston subassembly, indicating assembly, indicating piece, umbrella cap, protective cover, spring, screw plug, gasket, sealing washer, the indicator housing is main body structure, and piston subassembly is fixed in the inner chamber of indicator housing through screw plug together with spring, and the protective cover is fixed through the indicator housing spinning, and the umbrella cap forms indicating assembly with indicating piece through flaring spinning, and is compressed in the protective cover and seals the internal structure through the magnetic force effect of indicating assembly and piston subassembly, when the indicator alarms, piston subassembly moves downward, when moving to certain position, two magnetic steel repel each other, indicating assembly pops up, and sends out visual mechanical alarm signal. The utility model not only guarantees the high temperature resistant ability of the indicator, but also guarantees the three-proof ability of the indicator, and greatly improves the environmental adaptability of mechanical indicator.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft fuel system technology, and specifically relates to a high-temperature resistant and tri-proof mechanical indicator. Background Technology

[0002] To monitor the contamination status of the oil filter element, mechanical indicators are usually installed on the filtration device or corresponding pipeline. When the oil filter element becomes contaminated to a certain extent, the mechanical indicator will issue a visual alarm signal to remind ground staff to clean or replace the filter element to ensure the cleanliness of the system oil and the flow resistance of the oil filter.

[0003] Currently, domestic oil filter mechanical indicators generally adopt a structure with the indicator rod directly exposed or a structure with a transparent polycarbonate protective cover. The structure with the indicator rod directly exposed has poor resistance to dust, moisture, and air pollution. In environments with humidity, heat, mold, salt spray, sand, dust, and rain, the indicator rod is very prone to jamming or corrosion, affecting the product's functionality. On the other hand, protective covers made of transparent materials such as polycarbonate usually cannot withstand high-temperature environments above 180°C, which limits the product's temperature resistance. Materials that meet the temperature resistance requirements are usually fragile or too expensive. Therefore, there is an urgent need to develop a new type of mechanical indicator protection structure that can simultaneously meet the requirements of high temperature resistance and resistance to dust, moisture, and air pollution, thereby expanding the application range of mechanical indicators. Utility Model Content

[0004] To address the aforementioned issues, a novel mechanical indicator is proposed that simultaneously improves the mechanical indicator's high-temperature resistance and its resistance to three-proof features (water, electricity, and gas).

[0005] The technical solution of this utility model is as follows: In order to achieve the above-mentioned utility model objectives, a novel mechanical indicator is provided, comprising an indicator housing, a piston assembly, an indicator component, an indicator element, an umbrella cap, a protective cover, a spring, and a screw plug; the indicator housing is the main structure, the piston assembly together with the spring is fixed to the inner cavity of the indicator housing by the screw plug, the protective cover is screwed and fixed to the indicator housing, the umbrella cap is flared and screwed together with the indicator element to form the indicator component, and the indicator component and the piston assembly are pressed together by the magnetic force to seal the internal structure; when the indicator alarms, the piston assembly moves downward, and when it moves to a certain position, the two magnets repel each other, the indicator component pops up, and emits a visual mechanical alarm signal.

[0006] Furthermore, the umbrella cap and indicator are fixed by interference fit and flaring; the protective cover can be fixed by screwing on the top edge of the indicator housing, which improves the reliability of the product. The protective structure of the indicator component is a pure metal structure, which greatly improves the product's high temperature resistance.

[0007] Furthermore, the indicator housing can preferably be made of titanium alloy material (TC4-R) with low thermal conductivity and high strength, which can alleviate the rapid transfer of heat while having high pressure resistance.

[0008] Furthermore, the indicator housing has stepped pressure-sensing holes on its side. During operation, the change in the diameter of the pressure-sensing holes can effectively reduce the impact of external high-pressure oil on the high-pressure chamber.

[0009] Furthermore, the magnet material for the piston assembly and the indicator assembly can preferably be rare earth cobalt NSC26G.

[0010] Furthermore, the umbrella cap material can preferably be aluminum alloy 2A70-T6.

[0011] Furthermore, the protective cover material can preferably be stainless steel 06Cr18Ni9.

[0012] Furthermore, the spring material can preferably be stainless steel spring wire 0Cr17Ni7Al passivated and aged at a high temperature of 320℃ for 12 hours.

[0013] Furthermore, the screw plug material can preferably be 2A70-T6 aluminum alloy.

[0014] Furthermore, the sealing ring material can preferably be FM1075 rubber compound, which can be used for a long time in an environment of 300℃. This ensures both the high-temperature resistance and the waterproof, dustproof, and shockproof capabilities of the mechanical indicator, greatly improving its environmental adaptability.

[0015] The technical advantages of this invention are as follows: The structure designed in this invention breaks through the limitations of traditional mechanical indicators that cannot simultaneously withstand high temperatures and be waterproof, dustproof, and shockproof. It proposes a novel pure metal protective cover structure, forming a double protective structure consisting of an airtight isolation cavity and a heat-insulating paint coating on the outer surface of the indicator housing. This effectively isolates external heat transfer and improves the product's temperature resistance. By improving upon traditional protective cover structures and adopting a pure metal protective structure, it ensures both the indicator's high-temperature resistance and its waterproof, dustproof, and shockproof capabilities, greatly enhancing the environmental adaptability of mechanical indicators. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a high-temperature resistant and three-proof mechanical indicator according to this utility model.

[0017] The components include: indicator housing 1, piston assembly 2, indicator assembly 3, indicator element 3a, umbrella cap 3b, protective cover 4, spring 5, screw plug 6, gasket 7, and sealing ring 8. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0020] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of a high-temperature resistant and three-proof mechanical indicator according to this utility model.

[0022] See Figure 1 A high-temperature resistant and three-proof mechanical indicator structure includes an indicator housing 1, a piston assembly 2, an indicator assembly 3, an indicator element 3a, an umbrella cap 3b, a protective cover 4, a spring 5, a screw plug 6, a gasket 7, and a sealing ring 8. The indicator housing 1 is the main structure. The piston assembly 2, together with the spring 5, is fixed to the inner cavity of the indicator housing 1 by the screw plug 6. The protective cover 4 is fixed by screwing the indicator housing 1. The umbrella cap 3b is flared and screwed together with the indicator element 3a to form the indicator assembly 3. Through the magnetic force between the indicator assembly 3 and the piston assembly 2, the piston assembly 2 is pressed against the protective cover 4 to seal the internal structure. When the indicator alarms, the piston assembly 2 moves downward as shown in the figure. When it moves to a certain position, the two magnets repel each other, and the indicator assembly 3 pops up, emitting a visual mechanical alarm signal.

[0023] The umbrella cap 3b and the indicator 3a are fixed by interference fit and flaring. The protective cover 4 is fixed by screwing the edge of the indicator housing 1, which improves the reliability of the product. The protective structure of the indicator component 3 is a pure metal structure, which greatly improves the product's high temperature resistance.

[0024] The indicator housing 1 is preferably made of titanium alloy material (TC4-R) with low thermal conductivity and high strength, which can alleviate the rapid heat transfer while having high pressure resistance. The indicator housing 1 has stepped pressure-sensing holes on its side. During operation, the change in the diameter of the pressure-sensing holes can effectively reduce the impact of external high-pressure oil on the high-pressure chamber.

[0025] The magnets of piston assembly 2 and indicator assembly 3 are preferably made of rare earth cobalt NSC26G.

[0026] For the umbrella cap 3b material, aluminum alloy 2A70-T6 is preferred.

[0027] The protective cover 4 should preferably be made of stainless steel 06Cr18Ni9.

[0028] For spring 5, stainless steel spring wire 0Cr17Ni7Al is preferred. After passivation treatment, it is aged at a high temperature of 320℃ for 12 hours. For the screw plug 6, 2A70-T6 aluminum alloy is the preferred material. For sealing ring 8, the preferred material is FM1075 rubber, which can be used for a long time in an environment of 300℃.

[0029] The working principle of this utility model is as follows: When the oil filter is working normally, the mechanical indicator is in a non-indicating state. The umbrella cap 3b of the indicator component 3 is pressed onto the protective cover 4 by magnetic force, which plays a role in protecting the indicator component 3 and its internal structure. When the indicator alarms, the piston component 2 moves downward as shown in the figure. When it moves to a certain position, the two magnets repel each other, and the indicator component 3 pops up. At this time, the upper end face of the indicator component 3 contacts the inner wall of the protective cover 4 and emits a visual mechanical alarm signal.

[0030] In the non-operating state, the umbrella cap 3b of the indicator component 3 is magnetically pressed onto the protective cover 4, and the two are fitted together by a conical surface structure, which can achieve a good hard seal. This effectively ensures that the indicator has excellent sealing performance in both operating and non-operating states.

[0031] This utility model designs a high-temperature resistant and three-proof protective cover. The umbrella cap 3 is made of colorless anodized material and is in direct contact with the external environment, which meets the requirements. The umbrella cap 3b and the indicator 3a are fixed by interference fit and flaring. A metal mechanical fixing structure is adopted, and the protective cover 4 is fixed by screwing the edge of the indicator housing 1. This structure is suitable for protecting the indicating components of mechanical indicators in confined spaces, achieving protection of the indicating components and internal parts with minimal protective space, while ensuring reliable connection and effectively preventing the protective cover 4 from loosening. While possessing high temperature resistance and three-proof performance, it also has high stability and reliability, ensuring that the protective cover 4 will not fall off. The indicator housing 1 of the product is made of titanium alloy with low thermal conductivity and high strength, which alleviates the rapid heat transfer while having high pressure resistance. 4 and the indicator component 3 form an airtight cavity, effectively isolating the internal heat from external influences; a magnetic transmission structure with co-positioned ring-column magnets is adopted, and the movement of the indicator component 3 is controlled by the movement of the magnets. The magnetic force source is a permanent magnet, and the material is cobalt, which can withstand temperatures up to 300℃. It does not directly contact the external environment, which meets the requirements; the sealing material is FM1075, which can be used for a long time in an environment of 300℃ and for a short time (not exceeding 15min / h) in a high temperature environment of 300~350℃, which meets the requirements; heat-insulating paint is sprayed on the surface of the indicator housing 1 to improve the temperature resistance.

[0032] The above specific embodiments or examples are only used to explain the technical solutions of this utility model and are not intended to limit this application. Parts not described in detail are considered to be conventional technical means or common knowledge in the field. It can be understood by those skilled in the art that, based on the design concept of this application, adaptive modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications, equivalent substitutions, and adaptive improvements do not depart from the technical essence of this utility model and should all be covered within the protection scope of this application.

Claims

1. A mechanical indicator, characterized in that, The device includes an indicator housing (1), a piston assembly (2), an indicator assembly (3), an indicator (3a), an umbrella cap (3b), a protective cover (4), a spring (5), and a screw plug (6). The indicator housing (1) is the main structure. The piston assembly (2) together with the spring (5) is fixed to the inner cavity of the indicator housing (1) by the screw plug (6). The protective cover (4) is screwed and fixed to the top of the indicator housing (1). The umbrella cap (3b) is spun and formed with the indicator (3a) by flaring and screwing. The indicator assembly (3) is pressed into the protective cover (4) to seal the internal structure by the magnetic force between the indicator assembly (3) and the piston assembly (2). When the indicator alarms, the piston assembly (2) moves downward. When it moves to a certain position, the two magnets repel each other, and the indicator assembly pops up and emits a visual mechanical alarm signal.

2. A mechanical indicator as described in claim 1, characterized in that, The umbrella cap (3b) and the indicator (3a) are fixed by interference fit and flaring.

3. A mechanical indicator as described in claim 2, characterized in that, The indicator housing (1) is made of titanium alloy.

4. A mechanical indicator as described in claim 3, characterized in that, The indicator housing (1) has stepped pressure-sensing holes on its side.

5. A mechanical indicator as described in claim 1, characterized in that, The magnets of the piston assembly (2) and the indicator assembly (3) are made of rare earth cobalt NSC26G.

6. A mechanical indicator as described in claim 1, characterized in that, The umbrella cap (3b) is made of aluminum alloy 2A70-T6.

7. A mechanical indicator as described in claim 1, characterized in that, The protective cover (4) is made of stainless steel 06Cr18Ni9.

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