Blocking sleeve for beam type sealing hydraulic guide pipe connection

Abstract

The utility model provides a blocking sleeve for connection of a beam sealing hydraulic guide pipe, which relates to the technical field of hydraulic system pipeline connection and comprises a nut, a blocking cap and a retainer ring. A through hole structure is arranged in the nut, the plug cap comprises a self-sealing structure, the self-sealing structure comprises a double-taper slope structure, the double-taper slope structure is connected with elastic teeth, and the elastic teeth are connected with the annular groove. The self-sealing structure is connected with the outer diameter, the outer diameter is connected with the third inclined face, and the check ring is connected with the plug cap. According to the utility model, the reliability is high, and a fixed adapter is not required to be connected with a plug sleeve with other structural forms, so that the sealing times among parts are reduced; meanwhile, the sealing performance is excellent, the end face of the plug cap makes contact with the end face of the pipe connecting joint component to form a sealing contact pair, the groove in the front end of the plug cap is filled with high-pressure liquid to enable the sealing teeth to generate elastic deformation, high contact pressure is formed on the surface of the sealing contact pair, and the excellent sealing performance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic system pipeline connection, in particular to a plug sleeve for connecting a beam-type sealed hydraulic conduit. Background Art

[0002] With the rapid development of the national air transportation industry, higher requirements are put forward for the safety performance of aircraft operation. Among them, the safety and reliability of the aircraft pipeline system are extremely important. The hydraulic system on an aircraft is an important part of the pipeline system, and the hydraulic pipe joint is an important component of the aircraft hydraulic system.

[0003] The beam-type sealed pipe joint has the advantages of high reliability, simple structure, light weight, and the ability to withstand severe vibration and high-pressure pulses. However, at present, the plugging components of the beam-type sealed pipe joint still need to borrow plug sleeves of other structural forms and are connected through fixed adapters, which have problems such as many structural components, many sealing times, and low reliability. Summary of the Utility Model

[0004] The utility model provides a plug sleeve for connecting a beam-type sealed hydraulic conduit, which solves the problem that the existing plug sleeve for connecting a beam-type sealed hydraulic conduit needs to be connected through other fixed adapters.

[0005] To achieve the above object, the technical solution adopted by the utility model is:

[0006] A plug sleeve for connecting a beam-type sealed hydraulic conduit includes a nut, a plug cap, and a retaining ring; the inside of the nut is arranged as a through-hole structure, the plug cap includes a self-sealing structure, the self-sealing structure includes a double-tapered inclined surface structure, the double-tapered inclined surface structure is connected to elastic teeth, and the elastic teeth are connected to an annular groove; the self-sealing structure is connected to the outer diameter, the outer diameter is connected to a third inclined surface, and the retaining ring is connected to the plug cap.

[0007] Further, an internal thread is machined at the front end inside the nut, and a hexagonal flange structure is arranged at the bottom of the nut.

[0008] Further, the double-tapered inclined surface structure includes a first inclined surface and a second inclined surface, and there is an angle difference between the first inclined surface and the second inclined surface.

[0009] Further, a small hole structure is arranged at the tail of the plug cap.

[0010] Further, the retaining ring is arranged in the small hole structure and connected to the plug cap.

[0011] Further, the plug cap and the retaining ring are symmetrically structured up and down.

[0012] The beneficial effect of the utility model lies in:

[0013] 1. High reliability: There is no need to borrow a fixed adapter to connect with a plug sleeve of other structural forms, reducing the number of seals between parts and the possibility of oil leakage, thus increasing reliability.

[0014] 2. Good anti-loosening property: The inclined plane feature of the plug cap can better position the nut, ensuring that the nut component and the pipe connection joint component are closely connected by threads. Under a certain thread pre-tightening force, the reliability of the assembly connection can be guaranteed, and it has good anti-loosening property.

[0015] 3. Excellent sealing performance: The front end face of the plug cap is provided with a self-sealing structure, which forms a pair of sealing contact pairs when contacting the end face of the pipe connection joint component, ensuring the sealing performance after assembly; the front end annular groove of the plug cap extrudes the elastic teeth after filling with high-pressure liquid, causing the elastic teeth to elastically deform and forming a high contact pressure on the surface of the sealing contact pair, ensuring excellent sealing performance. Brief Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall device of the present invention.

[0018] Figure 2 Schematic diagram of the nut structure in the present invention.

[0019] Figure 3 Schematic diagram of the plug block structure in the present invention.

[0020] Figure 4 For Figure 3 The enlarged structure diagram.

[0021] Figure 5 Schematic diagram of the retaining ring structure in the present invention.

[0022] Explanation of the reference numerals in the drawings:

[0023] 1. Nut; 11. Through-hole structure; 12. Internal thread; 13. Hexagonal flange structure; 2. Plug cap; 21. Self-sealing structure; 22. First inclined plane; 23. Second inclined plane; 24. Elastic teeth; 25. Annular groove; 26. Outer diameter; 27. Third inclined plane; 28. Small hole structure; 3. Retaining ring. Detailed Embodiment

[0024] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0027] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0029] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0030] In addition, it should be noted that using words such as "first", "second" etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model.

[0031] The present utility model provides a technical solution: a plug sleeve for connecting a beam-type sealed hydraulic conduit, as Figure 1 shown, which includes a nut 1, a plug cap 2 and a retaining ring 3.

[0032] The nut 1 has a rotary body feature, as Figure 2 shown. The inside of the nut 1 is a through-hole structure 11, and its front end is machined with an internal thread 12, which can be assembled and connected with the external thread of other pipe connection joint components. The tail end of the nut 1 is provided with a hexagonal flange structure 13, which is convenient for cooperating with an installation wrench to provide support strength.

[0033] The plug cap 2 has a rotary body feature, and the leftmost side is a self-sealing structure 21, as Figure 3-4As shown in the figure; the left end face of the self-sealing structure 21 is a double-tapered inclined plane structure, which includes a first inclined plane 22 and a third inclined plane 23. There is a certain angular difference between the first inclined plane 22 and the second inclined plane 23, so as to ensure that when the first inclined plane 22 and the second inclined plane 23 contact the outer inclined plane of the pipe joint, they jointly form a sealing contact pair to ensure the sealing performance after assembly; adjacent to the second inclined plane 23 is an elastic tooth 24 with a certain thickness to ensure a certain rigidity, and adjacent to the elastic tooth 24 is an annular groove 25. In a fluid environment, after the annular groove 25 is filled with high-pressure fluid, it squeezes the elastic tooth 24, causing the elastic tooth 24 to undergo elastic deformation, thereby driving the second inclined plane 23 to squeeze the outer inclined plane of the pipe connection joint component, forming a high contact pressure on the surface of the sealing contact pair and improving the sealing performance.

[0034] Adjacent to the self-sealing structure 21 is an outer diameter 26, and the outer diameter 26 has a clearance fit with the through-hole structure 11 of the nut 1, thus ensuring the smooth installation of the nut 1. Adjacent to the outer diameter 26 is a third inclined plane 27. Under the action of the tightening force, the third inclined plane 27 can better position the nut 1, ensuring the close connection between the internal thread 12 of the nut 1 and the pipe joint, thereby improving the sealing performance. The tail of the plug cap 2 has a small hole structure 28, which is convenient for installing the retaining ring 3.

[0035] The retaining ring 3 is a symmetric structure, as Figure 5 shown. The retaining ring 3 can ensure that the nut 1 can rotate on the plug cap 2 without falling off; the size of the retaining ring 3 is made according to the small hole structure 28 at the tail of the plug cap 2.

[0036] During use, first put the nut 1 on the plug cap 2, and then install the retaining ring 3 in the small hole structure 28 on the plug cap 2; when connecting with the pipe connection joint component through the internal thread 12, the second inclined plane 27 of the plug cap 2 can better position the nut 1, ensuring the close connection between the internal thread 12 of the nut 1 and the pipe connection joint component. At this time, the first inclined plane 22 and the second inclined plane 23 in the self-sealing structure 21 of the plug cap 2 contact the outer inclined plane of the pipe joint. Under a certain thread pre-tightening force, they jointly form a sealing contact pair to ensure the sealing performance after assembly; at the same time, after the annular groove 25 at the front end of the plug cap 2 is filled with high-pressure fluid, it squeezes the elastic tooth, thereby driving the second inclined plane 23 to squeeze the outer inclined plane of the pipeline connecting component, further increasing the contact stress of the sealing contact surface, forming a high contact pressure on the surface of the sealing contact pair, ensuring excellent sealing performance, and there is no leakage under a working pressure of up to 28 MPa.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A beam-type sealing plugging sleeve for connecting a hydraulic conduit, characterized in that: The invention comprises a nut (1), a plugging cap (2) and a retaining ring (3); the interior of the nut (1) is provided with a through hole structure (11); the plugging cap (2) comprises a self-sealing structure (21); the self-sealing structure (21) comprises a double-tapered inclined surface structure; the double-tapered inclined surface structure is connected to an elastic tooth (24); the elastic tooth (24) is connected to an annular groove (25); the self-sealing structure (21) is connected to an outer diameter (26); the outer diameter (26) is connected to a third inclined surface (27); and the retaining ring (3) is connected to the plugging cap (2).

2. The beam-type sealing plugging sleeve for connecting a hydraulic conduit according to claim 1 is characterized in that: The inner front end of the nut (1) is processed with an internal thread (12), and the bottom of the nut (1) is provided with a hexagonal flange structure (13).

3. The beam-type sealing plugging sleeve for connecting a hydraulic conduit according to claim 1 is characterized in that: The double-tapered inclined surface structure comprises a first inclined surface (22) and a second inclined surface (23), and there is an angle difference between the first inclined surface (22) and the second inclined surface (23).

4. The beam-type sealing plugging sleeve for connecting a hydraulic conduit according to claim 1, characterized in that: The tail of the plugging cap (2) is provided with a small hole structure (28).

5. The beam-type sealing plugging sleeve for connecting a hydraulic conduit according to claim 4 is characterized in that: The retaining ring (3) is arranged in the small hole structure (28) and is connected to the blocking cap (2).

6. The beam-type sealing plugging sleeve for connecting a hydraulic conduit according to claim 5, characterized in that: The blocking cap (2) and the retaining ring (3) are of vertically symmetrical structures.

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