Pipe connection device

Abstract

The present invention provides a pipeline connection device, including a connecting sleeve and a pressing sleeve which are sleeved on the pipeline to be connected, the connecting sleeve and the pressing sleeve constitute a connection fit that limits the axial separation of the two, an elastic sealing ring is sleeved on the pipeline to be connected at the connection between the pressing sleeve and the connecting sleeve, the inner ring of the elastic sealing ring is embedded with locking teeth at uniform intervals in the circumferential direction, the inner ring of the elastic sealing ring has a complete sealing ring surface, the elastic sealing ring is radially deformed when the pressing sleeve and the connecting sleeve are close to each other, and the end of the connecting sleeve away from the pressing sleeve is connected to the pipeline connector or pipeline parts. In the above scheme, the radial contraction of the elastic sealing ring is achieved by bringing the connecting sleeve and the pressing sleeve close to each other, locking and fixing are achieved by the locking teeth, and sealing is achieved by the complete sealing ring surface, thereby ensuring the anti-slip ability and sealing ability of the pipeline connection device.

Description

Technical Field

[0001] The invention relates to pipeline maintenance and connection, in particular to a pipeline connecting device. Background Art

[0002] During pipeline laying or maintenance, it is usually necessary to connect the pipelines. The connection is usually made through flanges. For pipelines that cannot have flanges at the connection ends, flanges are generally welded. For pipelines that do not have the conditions for welding flanges, flanges are added through pipeline connection devices or directly connected to pipeline components such as tees, valves, and elbows.

[0003] Prior art, such as Chinese patent application number 201821094748.2, discloses an anti-slip pipe connection device, whose technical solution comprises a sealing ring, a pressing sleeve at one end of the sealing ring and a connecting sleeve at the other end of the sealing ring; a flange for pipe connection is arranged on the connecting sleeve, wherein the sealing ring comprises an elastic sealing ring and a plurality of metal teeth, each of which is fixed on the inner periphery of the elastic sealing ring and arranged evenly spaced along the circumferential direction; wherein the pressing sleeve and the connecting sleeve are connected to each other by a group of bolts, and under the tightening action of a group of bolts, the first ends of the pressing sleeve and the connecting sleeve respectively press against one end of the elastic sealing ring, causing the elastic sealing ring to deform, so that the elastic sealing ring is tightened radially inward to achieve the effect of locking and fixing. However, the metal teeth in the above scheme are integrated with the elastic sealing ring, and the length direction of the metal part is consistent with the radial size of the sealing ring. The elastic sealing ring cannot be tightened to fit the outer wall of the pipe at the position with the metal teeth, and the elastic sealing ring cannot form a complete sealing ring. In this way, it has good locking and fixing ability but poor sealing effect, and is prone to water leakage. The elastic sealing ring has less radial constraints and is prone to arching in the middle, which affects the sealing effect. In addition, the elastic sealing ring is generally exposed to the outside and is prone to aging and failure. Summary of the invention

[0004] The object of the present invention is to provide a pipeline connection device which ensures locking and fixing capability and has good sealing effect.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pipeline connecting device, including a connecting sleeve and a pressing sleeve which are sleeved on the pipeline to be connected, the connecting sleeve and the pressing sleeve constitute a connection fit that limits the axial separation of the two, an elastic sealing ring is sleeved on the pipeline to be connected at the connection between the pressing sleeve and the connecting sleeve, the inner ring of the elastic sealing ring is embedded with locking teeth at uniform intervals in the circumferential direction, the inner ring of the elastic sealing ring has a complete sealing ring surface, the elastic sealing ring is radially deformed when the pressing sleeve and the connecting sleeve are close to each other, and the end of the connecting sleeve away from the pressing sleeve is connected to the pipeline connector or pipeline component.

[0006] In the above scheme, the connecting sleeve and the pressing sleeve are brought close to each other to achieve radial contraction of the elastic sealing ring, locking and fixing are achieved through the locking teeth, and sealing is achieved through the complete sealing ring surface, thereby ensuring the anti-dropping ability and sealing ability of the pipeline connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 , 8 , 9, 10, 11, 12, and 13 are schematic diagrams of installation structures of various embodiments of the present invention;

[0008] Figure 2 , 3 , 4, and 5 are cross-sectional views of four embodiments of the present invention;

[0009] Figure 6 , 7 Schematic diagram of the three-dimensional structure of the elastic sealing ring of two embodiments of the present invention;

[0010] Fig.14 yes Fig.13 sectional view of . DETAILED DESCRIPTION

[0011] A pipe connection device comprises a connecting sleeve 10 and a pressing sleeve 20 which are sleeved on the pipe 1 to be connected. The connecting sleeve 10 and the pressing sleeve 20 constitute a connection fit which limits the axial separation of the two. An elastic sealing ring 30 is sleeved on the pipe 1 to be connected at the connection between the pressing sleeve 20 and the connecting sleeve 10. Locking teeth 31 are embedded in the inner ring of the elastic sealing ring 30 at uniform intervals in the circumferential direction. The inner ring of the elastic sealing ring 30 has a complete sealing annular surface. When the pressing sleeve 20 and the connecting sleeve 10 are close to each other, the elastic sealing ring 30 is radially deformed. The end of the connecting sleeve 10 away from the pressing sleeve 20 is connected to a pipe connector or a pipe component.

[0012] In the above scheme, the radial contraction of the elastic sealing ring 30 is achieved by bringing the connecting sleeve 10 and the pressing sleeve 20 close to each other, locking and fixing are achieved through the locking teeth 31, and the sealing effect is achieved through the complete sealing ring surface, thereby ensuring the anti-dropping ability and sealing ability of the pipeline connection device. The pipeline connecting piece is generally a connecting flange. The connector can be set on the end faces of the two pipelines 1 to be connected and then connected to each other through the connecting flange. The connecting sleeve 10 in the present application can also be directly set on pipeline parts such as elbows, tees, valves, half joints, and pipe clamps to reduce the number of connecting pieces. Figure 8 As shown, the connecting sleeve 10 itself can be a reducer for connecting two pipes with different diameters.

[0013] The inner rings of the adjacent sides of the compression sleeve 20 and the connection sleeve 10 and the outer wall of the pipe 1 to be connected respectively form an annular cavity for accommodating the two ends of the elastic sealing ring 30. The annular cavity is provided to radially position the two ends of the elastic sealing ring 30 to prevent the elastic sealing ring 30 from expanding too much and collapsing during the extrusion process. At the same time, the closed environment is conducive to improving the extrusion force and strengthening the sealing and locking effects. In addition, the two ends of the elastic sealing ring 30 are located in the annular cavity to prevent it from aging and rusting, thereby increasing its service life.

[0014] The inner rings of the adjacent sides of the pressing sleeve 20 and the connecting sleeve 10 are in a trumpet shape with a larger adjacent end and a smaller diverging end. The outer ring contour of the elastic sealing ring 30 near the pressing sleeve 20 is consistent with the inner ring contour of the pressing sleeve 20, and the outer ring contour of the elastic sealing ring 30 near the connecting sleeve 10 is consistent with the inner ring contour of the pressing sleeve 20. The trumpet shape substantially forms a guide step to convert part of the axial extrusion force caused by the pressing sleeve 20 and the connecting sleeve 10 approaching each other on both ends of the elastic sealing ring 30 into a radial extrusion force, so as to drive the elastic sealing ring 30 to deform radially.

[0015] The inner rings at both ends of the elastic sealing ring 30 are in a closed trumpet shape. After assembly, there is a certain gap between the inner rings at both ends of the elastic sealing ring 30 and the pipe to be connected, and compression space is reserved in the gap to facilitate radial contraction of the two ends of the elastic sealing ring 30 when the connecting sleeve 10 and the pressing sleeve 20 are close to each other, thereby enhancing the sealing effect.

[0016] Embodiment 1: Figure 2 As shown, the locking teeth 31 are arranged in the middle of the elastic sealing ring 30, the spacing between the connecting sleeve 10 and the pressing sleeve 20 is less than the axial dimension of the outer ring of the locking teeth 31, and the axial dimension of the inner ring of the locking teeth 31 is less than the inner ring width of the elastic sealing ring 30. Since the locking teeth 31 made of rigid material are blocked at the gap between the connecting sleeve 10 and the pressing sleeve 20, the elastic bulging of the elastic sealing ring 30 at the gap is effectively avoided during compression.

[0017] Embodiment 2: Figure 3 As shown, the locking teeth 31 are arranged at the half of the elastic sealing ring 30 close to the compression sleeve, and the axial dimension of the locking teeth 31 is smaller than the inner ring width of the elastic sealing ring 30. This further increases the width of the sealing surface and improves the sealing effect.

[0018] Embodiment 3: Figure 4 As shown, the cross section of the locking tooth 31 is in the shape of an I, and the outer ring of the I is embedded in the outer ring of the elastic sealing ring 30. The I shape effectively ensures its structural strength and the exposed outer ring of the I shape can more effectively resist the gap between the connecting sleeve 10 and the pressing sleeve 20.

[0019] Embodiment 4: Figure 5As shown, the cross section of the locking tooth 31 is in a “]” shape, and the outer ring of the “]” shape is embedded in the outer ring of the elastic sealing ring 30. The “]”-shaped metal structure still has a certain compression bending ability, which improves the bite force of the locking tooth 31.

[0020] The axial dimension of the locking tooth 31 / the inner ring width of the elastic sealing ring 30 = 1 / 3 to 1 / 2. In this way, the sealing surface of the elastic sealing ring 30 is wider and the sealing effect is better.

[0021] The sealing ring surface is provided with an annular sealing tooth 32, and the locking tooth 31 is made of a rigid metal material, so as to enhance the sealing effect and the locking effect.

[0022] The connecting sleeve 10 and the pressing sleeve 20 are connected by a square neck bolt 40. The connecting sleeve 10 and the pressing sleeve 20 are provided with square holes corresponding to the square neck bolts 40. The locking nut 41 of the square neck bolt 40 is located on the side away from the connecting sleeve 10. Since there are generally flanges, valves and other components on one side of the connecting sleeve 10, the space is small and it is not convenient to operate with a wrench. Therefore, the locking nut 41 is placed on the side of the pressing sleeve 20 so that the bolt can be locked in a larger space.

[0023] like Fig.12 , 13 As shown, the internal thread of the inner ring of the pressing sleeve 20 is threadedly connected with the external thread of the outer ring of one end of the connecting sleeve 10. In this way, the internal parts can be completely wrapped to prevent them from rusting or aging.

[0024] The outer ring of the pressing sleeve 20 is a regular polygonal structure, which is convenient for applying torque to rotate the pressing sleeve 20.

Claims

1. A pipe connection device, comprising a connection sleeve (10) and a pressing sleeve (20) sleeved on a pipe to be connected (1), the connection sleeve (10) and the pressing sleeve (20) forming a connection fit that limits axial separation of the two, characterized in that: The elastic sealing ring (30) is sleeved on the pipe (1) to be connected at the connection between the pressing sleeve (20) and the connecting sleeve (10), the inner ring of the elastic sealing ring (30) is embedded with locking teeth (31) at even intervals in the circumferential direction, the inner ring of the elastic sealing ring (30) has a complete sealing annular surface, the elastic sealing ring (30) is radially deformed when the pressing sleeve (20) and the connecting sleeve (10) are close to each other, and the end of the connecting sleeve (10) away from the pressing sleeve (20) is connected to the pipe connector or pipe component; The axial dimension of the locking tooth (31) / the inner ring width of the elastic sealing ring (30)=1 / 3 to 1 / 2, an annular sealing tooth (32) is provided on the sealing ring surface, and the locking tooth (31) is made of a rigid metal material.

2. The pipe connection device according to claim 1, characterized in that: An annular cavity for accommodating the two ends of the elastic sealing ring (30) is formed between the inner circles of the adjacent sides of the compression sleeve (20) and the connection sleeve (10) and the outer wall of the pipe (1) to be connected.

3. The pipe connection device according to claim 1 or 2, characterized in that: The inner rings of the adjacent sides of the pressing sleeve (20) and the connecting sleeve (10) are in a trumpet shape with a larger adjacent end and a smaller separated end; the outer ring profile of the elastic sealing ring (30) on the side close to the pressing sleeve (20) matches the inner ring profile of the pressing sleeve (20); and the outer ring profile of the elastic sealing ring (30) on the side close to the connecting sleeve (10) matches the inner ring profile of the pressing sleeve (20).

4. The pipe connection device according to claim 3, characterized in that: The inner rings at both ends of the elastic sealing ring (30) are in a closed trumpet shape.

5. The pipe connection device according to claim 2, characterized in that: The locking teeth (31) are arranged in the middle of the elastic sealing ring (30), the spacing between the connecting sleeve (10) and the pressing sleeve (20) is smaller than the axial dimension of the outer ring of the locking teeth (31), and the axial dimension of the inner ring of the locking teeth (31) is smaller than the width of the inner ring of the elastic sealing ring (30).

6. The pipe connection device according to claim 1, characterized in that: The locking teeth (31) are arranged at the half of the elastic sealing ring (30) close to the pressing sleeve, and the axial dimension of the locking teeth (31) is smaller than the inner ring width of the elastic sealing ring (30).

7. The pipe connection device according to claim 5 or 6, characterized in that: The cross section of the locking tooth (31) is in the shape of an I, and the outer ring of the I-shape is embedded in the outer ring of the elastic sealing ring (30).

8. The pipe connection device according to claim 5 or 6, characterized in that: The cross section of the locking tooth (31) is in the shape of a "]", and the outer ring of the "]" shape is embedded in the outer ring of the elastic sealing ring (30).

9. The pipe connection device according to claim 1, characterized in that: The connecting sleeve (10) and the pressing sleeve (20) are connected via a square neck bolt (40), and square holes corresponding to the square neck bolts (40) are provided on the connecting sleeve (10) and the pressing sleeve (20), and a locking nut (41) of the square neck bolt (40) is located on a side away from the connecting sleeve (10).

10. The pipe connection device according to claim 1, characterized in that: The internal thread arranged on the inner ring of the pressing sleeve (20) and the external thread arranged on the outer ring of one end of the connecting sleeve (10) form a threaded connection.

11. The pipeline connecting device according to claim 10, characterized in that: The outer ring of the pressing sleeve (20) is a regular polygonal structure.

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