PE pipe connecting device

Abstract

The utility model discloses a PE pipe connecting device which comprises a main body, a first conical surface is arranged at the end of the main body, a fixing nut is arranged at the top end of the first conical surface, the fixing nut is provided with a second conical surface, a sealing gasket is arranged in the first conical surface, and a pressing ring is arranged at the joint of the first conical surface and the sealing gasket. A pipeline fixing device is arranged at the position, close to the pressing ring, of the fixing nut, and an O-shaped ring is arranged at the contact position of the end, away from the conical face, of the fixing nut and the pipeline fixing device. And under the action of repeated vibration or strong external force, the joints of the pipelines cannot fall off, and the sealing performance is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of PE pipe connecting device, especially to a PE pipe connecting device. BACKGROUND

[0002] PE pipeline as the core component of conveying water, oil liquid or gas fluid, usually need to manufacture according to standardization specification to meet the transportation and construction requirements. However, in practical application, it is often necessary to extend the pipeline length or adjust the pipeline direction through the connector or welding method. The traditional welding process has problems such as complex construction and poor flexibility, and although the conventional pipeline connector can simplify the installation, it is easy to cause sealing failure or even pipeline falling off due to loose connection under dynamic working conditions (such as temperature fluctuation, mechanical load or foundation settlement), which has significant safety hazards.

[0003] In summary, the existing pipeline connecting device has significant shortcomings in structural strength, construction convenience and universality, and an improved scheme that can adapt to PE pipe and various material pipelines and realize reliable connection and long-term sealing performance under low operating force is urgently needed. SUMMARY

[0004] The utility model discloses a PE pipe connecting device to solve the technical problems of prior art.

[0005] The utility model discloses the following technical scheme:

[0006] A PE pipe connecting device, comprising a main body, the main body end is equipped with a conical surface, the conical surface top is equipped with fixed nut, the fixed nut is equipped with the second conical surface, the conical surface is equipped with the gasket in, and the gasket is equipped with the compression ring, the fixed nut is equipped with the pipeline fixing device near the compression ring, the fixed nut is equipped with the O ring in the contact place of pipeline fixing device.

[0007] Preferably, the pipeline fixing device comprises a fixing ring and a plurality of fixing parts, the cross section of the fixing part is a straight circular cone, and one part of the fixing part is located on the outer surface of the fixing ring, and the other part is located on the inner surface of the fixing ring.

[0008] Preferably, the fixing ring is made of polyethylene (PE) material.

[0009] Preferably, the angle formed by the second conical surface of the fixed nut and the center line of the fixed nut, and the angle formed by the perpendicular line from the apex of the fixing ring to the second conical surface and the second conical surface, are both 5°~15°.

[0010] The main body, the first conical surface, the fixing nut, the sealing gasket, the compression ring, the pipeline fixing device, the second conical surface and the O-ring are concentrically arranged with the pipeline.

[0011] The utility model discloses the beneficial effect is:

[0012] Not only can be used for pe pipe, also can be used for stainless steel pipe, cast iron pipe, synthetic resin pipe and so on various material's pipeline connection, can with small force easily connect pipeline, and under repeated vibration or strong external force, pipeline connection place will not fall off, keep the leakproofness. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the sectional view of the utility model.

[0014] Figure 2 It is the enlarged view of A place of the utility model.

[0015] Figure 3 It is the schematic structural view of the pipeline fixing device of the utility model.

[0016] Figure 4 It is the cut surface view of the first conical surface of the utility model.

[0017] Figure 5 It is the cut surface view of the fixing nut of the utility model.

[0018] Figure 6 It is the cut surface view of the sealing gasket of the utility model. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor all belong to the range of protection of the utility model.

[0020] Please refer to Figures 1-6 The utility model provides a technical scheme:

[0021] A kind of PE pipe connecting device, including main body 1, the end of main body 1 is equipped with one conical surface 2, the surface of one conical surface 2 is equipped with external thread, the top of one conical surface 2 is equipped with fixed nut 3, the inner surface of fixed nut 3 is equipped with internal thread, both thread cooperation, fixed nut 3 is equipped with second conical surface 7, one conical surface 2 is equipped with sealing pad 4, the junction with sealing pad 4 is equipped with compression ring 5, fixed nut 3 is equipped with pipeline fixing device 6 at the place close to compression ring 5, fixed nut 3 is equipped with O ring 9 at the place of contact with pipeline fixing device 6 away from conical surface 2, wherein main body and fixed nut 3 can be made of metal or hard synthetic resin, preferably made of stainless steel.

[0022] As shown in Figure 1 The both ends of main body 1 are formed with conical surface to ensure sealing. The conical surface protrudes at the end portion of main body, when fixed nut 3 is fastened, the inserted sealing pad 4 of rubber material is compressed in transverse direction by the thrust of compression ring 5 of metal material, the inner diameter is reduced and the outer diameter is increased, so that the sealing pad is tightly fitted to the outer surface of pipeline and the inner surface of pipeline connecting device, and the sealing is maintained.

[0023] The both ends of main body 1 are threadedly connected with fixed nut 3, and pipeline fixing device 6 and compression ring 5 are installed inside fixed nut 3. In addition, in order to enhance the sealing, O ring 9 is installed between pipeline fixing device 6 and the pipeline insertion part of fixed nut.

[0024] Pipeline fixing device 6 includes fixed ring 61 and a plurality of fixing parts 62, the cross section of fixing part 62 is straight conical, and one part of fixing part 62 is located on the outer surface of fixed ring 61 and the other part is located on the inner surface of fixed ring 61.

[0025] Fixed nut 3 is threadedly connected with pipeline fixing device 6, supports the internally installed pipeline fixing device 6 and compression ring 5, and pushes compression ring 5 to sealing pad 4 when fixed nut 3 is fastened, so that the sealing pad plays a sealing role, and the plurality of fixing parts 62 of pipeline fixing device 6 are compressed to the outer surface of pipeline 8 by applying force.

[0026] Fixing part 62 is fixed on fixed ring 61 with equal central angle, the inclined surface of fixing part 62 is perpendicular to the center line of fixed ring 61 and faces main body 1. This design not only makes fixing part 62 easy to cut into the outer surface of pipeline, but also when the pipeline is subjected to external force, the inclined surface of fixing part 62 contacts with the groove part of pipeline, preventing the pipeline from falling off. Fixed ring 61 is made of polyethylene (PE) material, preferably using PERT (polyethylene high temperature reinforced) material for injection molding. When injection molding, the injection temperature of molten synthetic resin is 80~120℃.

[0027] The inner surface of the fixing nut 3 is formed with a taper surface in contact with the protruding part of the fixing part 62, which makes the fixing part 62 easily cut into the outer surface of the pipeline 8 when the fixing nut 3 is fastened.

[0028] When the fixing nut 3 is fastened, the outer side part of the fixing part 62 is in contact with the taper surface of the fixing nut 3, which makes the fixing part 62 contract towards the center line of the pipeline 8, the inclined edge of the fixing part 62 is in close contact with the outer surface of the pipeline 8, the outer surface of the pipeline 8 is compressed and a groove is formed, which prevents the pipeline from falling off.

[0029] The pipeline connecting device of the utility model does not need to form a groove in advance on the outer surface of the pipeline before connecting the pipeline.

[0030] The angle formed by the taper surface of the fixing nut 3 and the center line of the fixing nut 3 and the angle formed by the vertical line from the vertex of the fixing part 62 to the taper surface and the taper surface is 5-15 degrees. If the angle is less than 5 degrees, the depth of the fixing part 62 cut into the pipeline is too shallow, and the anti-falling function is insufficient; if the angle is greater than 15 degrees, the part of the fixing part 62 cut into the pipeline is too sharp, which may cause damage to the pipeline or the metal body itself.

[0031] The pipeline connecting device of the utility model can be used not only for PE pipes but also for pipeline connection of various materials such as stainless steel pipes, cast iron pipes and synthetic resin pipes, which can easily connect the pipeline with small force and will not fall off at the pipeline connection part under repeated vibration or strong external force, keeping the sealing property.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A PE pipe connection device comprising a body (1), characterized in that, The main body (1) is provided with a first conical surface (2) at one end, the surface of the first conical surface (2) is provided with external threads, the top end of the first conical surface (2) is provided with a fixing nut (3), the fixing nut (3) is provided with a second conical surface (7), the second conical surface (7) is provided with internal threads, the first conical surface (2) is internally provided with a sealing gasket (4), the connection part of the sealing gasket (4) is provided with a compression ring (5), the fixing nut (3) is provided with a pipeline fixing device (6) near the compression ring (5), and the end of the fixing nut (3) away from the conical surface (2) is provided with an O-ring (9) at the contact part with the pipeline fixing device (6).

2. A PE pipe jointing device according to claim 1, characterised in that: The pipeline fixing device (6) comprises a fixing ring (61) and a plurality of fixing parts (62), the cross section of the fixing part (62) is a straight conical shape, and one part of the fixing part (62) is located on the outer surface of the fixing ring (61), and the other part is located on the inner surface of the fixing ring (61).

3. A PE pipe jointing device according to claim 2, characterised in that: The fixing ring (61) is made of polyethylene (PE) material.

4. A PE pipe coupling device according to claim 2, characterised in that: The angle formed by the second conical surface (7) of the fixing nut (3) and the center line of the fixing nut (3), and the angle formed by the perpendicular line from the vertex of the fixing ring (61) to the second conical surface (7) and the second conical surface (7) are both 5°-15°.

5. A PE pipe coupling device according to claim 1, characterised in that: The main body (1), the first conical surface (2), the fixing nut (3), the sealing gasket (4), the compression ring (5), the pipeline fixing device (6), the second conical surface (7), the O-ring (9) and the pipeline (8) are coaxially arranged.

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