Fixed clamp for sand protector installation

Abstract

This utility model discloses a fixing clamp for installing a sand filter, aiming to solve the problem that traditional clamps used to connect helicopter engine air intake pipes and sand filters are prone to loosening under strong vibration environments. The fixing clamp for installing a sand filter disclosed in this utility model includes an annular clamp body and threaded locking parts at both ends of the body. An elastic anti-loosening strip is fixedly installed on the inner side of the annular clamp body. In use, by tightening the threaded locking parts, the annular clamp body fixes the air intake pipe to the connection port of the sand filter, while the inner anti-loosening strip is compressed. This anti-loosening strip acts as an elastic gasket, effectively absorbing and buffering the vibration generated by the engine, maintaining a continuous preload on the air intake pipe, thereby preventing the clamp from loosening due to vibration and effectively avoiding the risk of connection loosening. This utility model has a simple structure, significant anti-loosening effect, and significantly improves the reliability and safety of the connection.

Description

Technical Field

[0001] This utility model relates to the field of connection technology, and in particular to a fixing clamp for installing a sand guard. Background Technology

[0002] When helicopters operate in harsh environments such as deserts, coastal areas, or dusty environments, the air intake of their engines contains a large amount of sand or dust. Once these particles enter the engine, they can cause severe wear on delicate internal components (such as compressor blades), shorten engine life, and may even lead to flight accidents. Therefore, installing sand filters on helicopter engines is a necessary technical measure.

[0003] Sand filters are typically connected to the engine's air intake via an intake pipe. Currently, traditional clamps or similar fasteners are commonly used to secure the connection between the engine intake pipe and the sand filter. However, during helicopter flight, the engine itself generates high-frequency, intense vibrations. This continuous vibration is transmitted to the connection between the intake pipe and the sand filter, causing the locking force of traditional rigid clamps to gradually decrease and become prone to loosening. Over time, this not only reduces the seal at the connection, affecting the sand-filtering effect, but in more serious cases, it may lead to the intake pipe and sand filter connection becoming detached, posing a serious threat to flight safety. Therefore, ensuring the reliability and stability of the connection under such high vibration conditions is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0004] The purpose of this utility model is to provide a fixing clamp for installing a sand filter, which solves the technical problem that the locking force of traditional rigid clamps gradually decreases under continuous vibration, making them easy to loosen and causing the connection between the air intake pipe and the sand filter to become loose.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a fixing clamp for installing a sand filter, the fixing clamp for installing the sand filter comprising: The ring clamp body has mounting grooves at both ends; A threaded locking part is provided on the mounting groove of the annular clamp body; An anti-loosening strip is fixed to the inner side of the annular clamp body, and the anti-loosening strip has a certain degree of elasticity.

[0006] In one embodiment, the threaded locking portion includes: Two connecting blocks are respectively installed in the mounting grooves at both ends of the annular clamp body. One connecting block has a through hole, and the other connecting block has a threaded hole coaxial with the through hole. A fastening bolt passes through the through hole of the connecting block, and the threaded section of the fastening bolt is threadedly engaged with the threaded hole on the connecting block.

[0007] In one embodiment, the threaded locking part further includes a threaded reinforcing sleeve, which is fixed to the connecting block having a threaded hole, and the threaded reinforcing sleeve is threadedly engaged with the fastening bolt.

[0008] In one embodiment, the connecting block is hinged and fixed within the mounting groove of the annular clamp body.

[0009] In one embodiment, the anti-loosening strip has an M-shaped cross-section.

[0010] In one embodiment, the annular clamp body is made of a high-strength, high-toughness metal material.

[0011] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages: The sand trap mounting clamp provided in this embodiment of the invention features an elastic anti-loosening strip added to the inner side of the annular clamp body. When the clamp is used to lock the intake pipe, this anti-loosening strip is compressed and pressed tightly against the outer wall of the intake pipe. The anti-loosening strip acts like an elastic buffer pad, effectively absorbing and offsetting vibrations from the engine. When vibration occurs, the elastic deformation of the anti-loosening strip compensates for the instantaneous impact and gaps caused by the vibration, maintaining a constant pre-tightening pressure on the intake pipe. This significantly reduces the risk of the threaded locking part loosening due to vibration, ensuring a durable and stable connection.

[0012] Through the aforementioned anti-loosening design, this invention effectively avoids the potential risk of the air intake pipe becoming detached from the sand filter connection due to vibration. This not only ensures the integrity and effectiveness of the sand filter system but also improves the safety and reliability of the helicopter flying in harsh environments. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the structure of the fixing clamp for installing the sand guard provided in this embodiment of the utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3Exploded view of the fixing clamp for installing the sand guard provided in the embodiment of this utility model; Figure 4 A cross-sectional view of the fixing clamp for installing the sand guard provided in an embodiment of this utility model; Figure 5 A schematic diagram showing the installation of the sand filter using the fixing clamps before use; Figure 6 A schematic diagram showing the process of using a fixing clamp to secure the engine intake pipe to the connection port of the sand filter.

[0015] The labels for the various figures are as follows: 1. Ring clamp body; 2. Threaded locking part; 3. Anti-loosening strip; 4. Sand filter; 5. Engine intake pipe; 11. Mounting groove; 21. Connecting block; 22. Fastening bolt; 23. Threaded reinforcing sleeve; 41. Connection port. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figures 1 to 6 This utility model discloses a fixing clamp for installing a sand filter 4. This clamp is mainly used to reliably fix the helicopter engine air intake pipe 5 to the connection port 41 of the sand filter 4, so as to solve the problem that traditional clamps are prone to loosening under strong vibration environment.

[0021] like Figure 1 , Figure 3 and Figure 4 As shown, the fixing clamp includes three main parts: annular clamp body 1, threaded locking parts 2 set at both ends of the body, and anti-loosening strip 3 fixed inside the body.

[0022] The annular clamp body 1 is the basic structure of the clamp. It is made of high-strength, high-toughness metal material (specifically, high-strength alloy steel) to ensure sufficient fastening strength and durability. Mounting grooves 11 are provided at both ends of the annular clamp body 1 for mounting and fixing the threaded locking parts 2.

[0023] The threaded locking part 2 is used to tighten and lock the clamp. Please refer to... Figure 2 and Figure 3 The threaded locking part 2 includes two connecting blocks 21 and a fastening bolt 22. The two connecting blocks 21 are respectively installed in the mounting grooves 11 at both ends of the annular clamp body 1. Optionally, the connecting blocks 21 are fixed in the mounting grooves 11 by hinge, which makes the clamp more flexible and fit when tightened. One connecting block 21 has a through hole, while the other connecting block 21 has a threaded hole coaxial with the through hole. The bolt passes through the connecting block 21 with the through hole, and its threaded section forms a threaded engagement with the threaded hole on the other connecting block 21. By rotating the fastening bolt 22, the two connecting blocks 21 can be brought closer together, thereby tightening the entire annular clamp body 1 and thus clamping and fixing the engine intake pipe 5.

[0024] Optionally, to further increase the reliability of the threaded connection, a threaded reinforcing sleeve 23 can be fixed to the connecting block 21 with the threaded hole. The internal thread of the reinforcing sleeve mates with the fastening bolt 22, and by increasing the length and number of threads engaged, it effectively prevents thread slippage or damage that may occur under high preload.

[0025] The anti-loosening strip 3 is an elastic band that is securely fixed to the entire inner side of the annular clamp body 1. For example... Figure 4 As shown, in one specific embodiment, the cross-section of the anti-loosening strip 3 can be designed in an M-shape. This structural design provides better elasticity and support when subjected to radial compression.

[0026] The specific working principle is as follows: like Figure 5 and Figure 6 As shown, during installation, the fixing clamp of this utility model is first placed on the part of the engine intake pipe 5 that needs to be fixed to the connection port 41 of the sand filter 4. Then, the fastening bolt 22 is rotated. The screwing of the bolt causes the two connecting blocks 21 to be pulled closer to each other, and the diameter of the annular clamp body 1 is reduced accordingly, thereby tightly clamping the connection port 41 of the intake pipe and the sand filter 4.

[0027] During this process, the inner elastic anti-loosening strip 3 is compressed, tightly adhering to the outer wall of the air intake pipe, and generating continuous radial preload pressure. When the helicopter engine operates and generates strong vibrations, these vibrations are transmitted to the connection point. At this time, the compressed anti-loosening strip 3 acts as an elastic buffer pad, effectively absorbing and offsetting the impact of vibration. Its elastic deformation can compensate for any instantaneous small gaps that may occur due to vibration, maintaining the preload force on the air intake pipe at all times, thereby greatly reducing the risk of the threaded locking part 2 gradually loosening due to vibration.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing clamp for installing a sand filter, characterized in that, The fixing clamps for installing the sand filter include: The ring clamp body has mounting grooves at both ends; A threaded locking part is provided on the mounting groove of the annular clamp body; An anti-loosening strip is fixed to the inner side of the annular clamp body, and the anti-loosening strip has a certain degree of elasticity.

2. The fixing clamp for installing the sand filter according to claim 1, characterized in that, The threaded locking part includes: Two connecting blocks are respectively installed in the mounting grooves at both ends of the annular clamp body. One connecting block has a through hole, and the other connecting block has a threaded hole coaxial with the through hole. A fastening bolt passes through the through hole of the connecting block, and the threaded section of the fastening bolt is threadedly engaged with the threaded hole on the connecting block.

3. The fixing clamp for installing the sand filter according to claim 2, characterized in that: The threaded locking part also includes a threaded reinforcing sleeve, which is fixed to the connecting block having a threaded hole, and the threaded reinforcing sleeve is threadedly engaged with the fastening bolt.

4. The fixing clamp for installing the sand filter according to claim 2, characterized in that: The connecting block is hinged and fixed in the mounting groove of the annular clamp body.

5. The fixing clamp for installing the sand filter according to claim 1, characterized in that: The cross-section of the anti-loosening strip is M-shaped.

6. The fixing clamp for installing the sand filter according to claim 1, characterized in that: The ring clamp body is made of high-strength and high-toughness metal material.

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