Efficient water leakage prevention internal thread elbow

Abstract

The utility model relates to the technical field of pipeline connection, in particular to an efficient water leakage prevention internal thread elbow which comprises an elbow body, the two connecting ends of the elbow body are the same in structure and internally provided with internal thread sections, the tail ends of the internal thread sections are provided with conical sealing faces, the outer walls of the conical sealing faces are coaxially provided with annular sealing grooves, and the annular sealing grooves are communicated with the internal thread sections. During installation, the elastic sealing ring is firstly pressed into the sealing groove, an external pipeline is guided to be screwed in through the guiding inclined face, the conical sealing face is in interference fit with the end face of the pipeline after screwing is conducted, and the elastic sealing ring is pressed into the sealing groove through the guiding inclined face. Meanwhile, the elastic sealing ring generates radial deformation to form secondary sealing, the conical sealing face mechanical sealing and the elastic sealing ring form double guarantees, the flow guide groove reduces the impact force of water flow, the direct action on the sealing structure is reduced, installation is convenient, the guide inclined face assists alignment, and the leakage risk caused by installation errors is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, specifically to an efficient internal thread elbow that prevents water leakage. Background Technology

[0002] An internal threaded elbow is a component used for pipe connections, primarily to change the flow direction and angle of pipelines. Made of high-quality materials, it possesses excellent corrosion resistance and high-pressure resistance, and is widely used in industries such as petrochemicals, aerospace, shipbuilding, and power generation. Internal threaded elbows are characterized by their compact structure, light weight, and easy installation. They help piping systems achieve fluid bending and diversion, and are suitable for various working environments and media.

[0003] Existing internal thread elbows generally use a single thread sealing structure, which has the following drawbacks:

[0004] Insufficient sealing can easily lead to leakage due to thermal expansion and contraction or vibration after long-term use.

[0005] The thread machining requires high precision, and in actual installation, misalignment can easily lead to seal failure.

[0006] The lack of pressure buffer design makes the sealing ring prone to displacement due to water flow impact. Utility Model Content

[0007] The purpose of this utility model is to provide a highly efficient leak-proof internal thread elbow with a double sealing structure, good sealing effect, reduced water flow impact force, reduced direct impact on the sealing structure, convenient installation, and reduced risk of leakage caused by installation errors.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a highly efficient leak-proof internal thread elbow, comprising an elbow body, wherein the two connecting ends of the elbow body have the same structure and both are provided with internal thread sections, the end of the internal thread section is provided with a conical sealing surface, the outer wall of the conical sealing surface is coaxially provided with an annular sealing groove, an elastic sealing ring is embedded in the annular sealing groove, a guide groove is provided on the inner side of the bent part of the elbow body, and a guide slope is provided at the inlet of the internal thread section.

[0009] To reduce the impact force of water flow, the preferred type of internal threaded elbow for efficient water leakage prevention according to this utility model has a spiral involute structure with a spiral angle of 15-25° and a depth of 0.8-1.2mm.

[0010] In order to generate radial deformation and form a secondary seal, as a preferred embodiment of this utility model of an efficient leak-proof internal threaded elbow, the cross-section of the elastic sealing ring is Y-shaped, and the material is hydrogenated nitrile rubber or fluororubber.

[0011] To reduce installation difficulty, as a preferred embodiment of this utility model of an efficient leak-proof internal thread elbow, the width of the guide slope is 1.2-1.5 times the thread height of the internal thread section.

[0012] To improve the sealing effect, as a preferred embodiment of this utility model of a highly efficient leak-proof internal threaded elbow, the surface of the conical sealing surface is provided with a nano-level concave-convex texture.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] During installation, the elastic sealing ring is first pressed into the sealing groove, and the external pipe is guided into the groove by the guide bevel. After tightening, the conical sealing surface is interference-fitted with the pipe end face. At the same time, the elastic sealing ring undergoes radial deformation to form a secondary seal. The mechanical seal of the conical sealing surface plus the elastic sealing ring form a double guarantee. The guide groove reduces the impact force of water flow and reduces the direct effect on the sealing structure. It is also easy to install. The guide bevel assists in alignment and reduces the risk of leakage caused by installation errors. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 2 This is an enlarged structural diagram of part a of this utility model;

[0017] Figure 3 This is a cross-sectional view of the elastic sealing ring of this utility model;

[0018] Figure 4 This is a side view of the flow channel structure of this utility model.

[0019] In the diagram: 1. Elbow body; 2. Internal thread section; 3. Conical sealing surface; 4. Sealing groove; 5. Elastic sealing ring; 6. Guide groove; 7. Guide slope. Detailed Implementation

[0020] Please see Figures 1 to 4 A highly efficient leak-proof internal threaded elbow includes an elbow body 1. The two connecting ends of the elbow body 1 have the same structure and are both provided with internal thread sections 2. The end of the internal thread section 2 is provided with a conical sealing surface 3. The outer wall of the conical sealing surface 3 is coaxially provided with an annular sealing groove 4. An elastic sealing ring 5 is embedded in the annular sealing groove 4. A guide groove 6 is provided on the inner side of the bent part of the elbow body 1. A guide slope 7 is provided at the inlet of the internal thread section 2.

[0021] In this embodiment: During installation, the elastic sealing ring 5 is first pressed into the sealing groove 4, and the external pipe is guided into the groove by the guide slope 7. After tightening, the conical sealing surface 3 is pressurized with the pipe end face. At the same time, the elastic sealing ring 5 undergoes radial deformation to form a secondary seal. The mechanical seal of the conical sealing surface 3 plus the elastic sealing ring 5 form a double guarantee. The guide groove 6 reduces the impact force of water flow and reduces the direct effect on the sealing structure. It is also easy to install. The guide slope 7 assists in alignment and reduces the risk of leakage caused by installation errors.

[0022] As a technical optimization of this utility model, the guide groove 6 has a spiral involute structure with a spiral angle of 15-25° and a depth of 0.8-1.2mm.

[0023] In this embodiment, the guide groove 6 has a spiral involute structure with a spiral angle of 15-25° and a depth of 0.8-1.2mm, which reduces the impact force of water flow and reduces the direct effect on the sealing structure.

[0024] As a technical optimization of this utility model, the cross-section of the elastic sealing ring 5 is Y-shaped, and the material is hydrogenated nitrile rubber or fluororubber.

[0025] In this embodiment: the cross-section of the elastic sealing ring 5 is Y-shaped, and the material is hydrogenated nitrile rubber or fluororubber. When compressed, it undergoes radial deformation to form a seal.

[0026] As a technical optimization of this utility model, the width of the guide slope 7 is 1.2-1.5 times the thread height of the internal thread segment 2.

[0027] In this embodiment, the width of the guide slope 7 is 1.2-1.5 times the thread height of the internal thread section 2. The guide slope 7 guides the external pipe to screw in. After tightening, the conical sealing surface 3 is interference-fitted with the pipe end face to assist in alignment and reduce the risk of leakage caused by installation errors.

[0028] As a technical optimization of this utility model, the surface of the conical sealing surface 3 is provided with a nano-level concave-convex texture.

[0029] In this embodiment, the surface of the conical sealing surface 3 is provided with a nano-level textured surface to improve the fit with the pipe end face and enhance the sealing performance.

[0030] Working principle: During installation, the elastic sealing ring 5 is first pressed into the sealing groove 4, and the external pipe is guided into the groove by the guide slope 7. After tightening, the conical sealing surface 3 is interference-fitted with the end face of the pipe. At the same time, the elastic sealing ring 5 undergoes radial deformation to form a secondary seal. The mechanical seal of the conical sealing surface 3 plus the elastic sealing ring 5 form a double guarantee. The guide groove 6 reduces the impact force of water flow and reduces the direct effect on the sealing structure. It is also easy to install. The guide slope 7 assists in alignment and reduces the risk of leakage caused by installation errors.

[0031] 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 highly efficient leak-proof internal threaded elbow, comprising an elbow body (1), characterized in that: The two connecting ends of the elbow body (1) have the same structure and are both provided with internal thread sections (2). The end of the internal thread section (2) is provided with a conical sealing surface (3). The outer wall of the conical sealing surface (3) is coaxially provided with an annular sealing groove (4). An elastic sealing ring (5) is embedded in the annular sealing groove (4). A guide groove (6) is provided on the inner side of the bent part of the elbow body (1). A guide slope (7) is provided at the entrance of the internal thread section (2).

2. The highly efficient leak-proof internal threaded elbow according to claim 1, characterized in that: The guide groove (6) has a spiral involute structure with a spiral angle of 15-25° and a depth of 0.8-1.2 mm.

3. The highly efficient leak-proof internal threaded elbow according to claim 1, characterized in that: The cross-section of the elastic sealing ring (5) is Y-shaped, and the material is hydrogenated nitrile rubber or fluororubber.

4. The highly efficient leak-proof internal threaded elbow according to claim 1, characterized in that: The width of the guide slope (7) is 1.2-1.5 times the thread height of the internal thread section (2).

5. The highly efficient leak-proof internal threaded elbow according to claim 1, characterized in that: The surface of the conical sealing surface (3) is provided with a nanoscale texture.

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