A hydraulic pipeline joint with dislocation buffering function

Abstract

The invention relates to a water conservancy pipeline joint with a dislocation buffering function, which effectively solves the problem of poor earthquake resistance at the pipeline interface; the technical solution includes two groups of connection units, each group of connection units includes a connection pipe, and an outer wall of one end of the connection pipe is provided with a connection plate, and the connection unit also includes an annular pressure plate, and the two pressure plates are connected and pressed by flange bolts, and the annular hole of the pressure plate is larger than the outer diameter of the connection pipe, so that the connection pipe and the connection plate have a margin for radial relative movement with the pressure plate, each connection plate is provided with a groove, and the pressure plate is provided with a mound-shaped protrusion, and the mound-shaped protrusion corresponds to the groove one by one, and compression springs are installed on the flange bolts of the two pressure plates, so that the two pressure plates have an elastic margin for axial movement while being pressed; the invention enables the connected pipeline to have an active margin for rotation around the axis and radial displacement, and can effectively buffer the vibration transmitted to the pipeline itself, and avoid leakage at the pipeline interface due to displacement.

Description

Technical Field

[0001] The invention relates to the field of water conservancy pipelines, in particular to a water conservancy pipeline joint with a dislocation buffering function. Background Art

[0002] Most water conservancy pipelines are buried underground and are connected by a large number of pipe sections. Since the pipelines are buried in the soil, the soil vibration caused by vehicles, large-scale water conservancy or mechanical equipment, earthquakes, etc. will be transmitted to the pipelines, causing them to vibrate. The interfaces of the pipelines generally adopt rigid fixed connections without relative activity margins. Therefore, the interfaces are prone to dislocation, fracture, cracks, etc., leading to leakage. In order to reduce the interference of soil vibration on the pipelines, some seismic bearings or seismic brackets will be set up. After the pipelines are connected, they will be supported at the interfaces of the pipelines to buffer the transmission of soil vibration to the pipelines. For example, the invention patent with application number 202011289727.8 sets the pipeline on a buffer bracket and uses the relative movement between the pipeline and the buffer bracket for buffering. The idea of ​​this external buffer bracket is to cut off the transmission of soil vibration to the pipeline as much as possible, but it cannot completely prevent soil vibration from interfering with the pipeline. Since the pipelines are rigidly connected, when the vibrations of the two sections of the pipelines are inconsistent, the interfaces will be sheared and torsion, resulting in dislocation, fracture, cracks, etc., leading to leakage. Summary of the invention

[0003] In order to improve the seismic resistance of a pipeline interface, the present invention provides a hydraulic pipeline joint with a dislocation buffering function.

[0004] The technical solution includes two groups of connection units, each of which includes a connection pipe, and an outer wall of one end of the connection pipe is coaxially provided with an annular connection disk extending outward, the end of the pipe to be connected is inserted into the connection pipe and fixed, and then the connection disks on the connection pipes of the two groups of connection units are coaxially matched to achieve the connection of the pipes. The connection unit also includes an annular pressure plate, which is sleeved outside the connection pipe, and the two pressure plates of the two groups of connection units clamp the two connection disks in the middle, and the two pressure plates are connected and compressed by flange bolts; the annular hole of the pressure plate is larger than the outer diameter of the connection pipe, so that the connection pipe and the connection disk have a margin for radial relative movement with the pressure plate; a plurality of arc-shaped grooves are uniformly distributed on the circumference of the outer side surface of each connection disk, and a plurality of mound-shaped protrusions of the same shape and size as the grooves are uniformly distributed on the inner side surface of each pressure plate, and the mound-shaped protrusions on the pressure plate correspond one by one to the grooves on the same side connection plate, and compression springs are installed on the flange bolts of the two pressure plates, and the compression springs are located between the nuts and the pressure plates, so that the two pressure plates have an elastic margin for axial movement while being compressed.

[0005] Each group of connection units also includes a clamp, which is clamped tightly on the outer wall of the pipe. A plurality of connection blocks are fixed to the outer wall of the clamp, and the connection blocks are connected to the tail of the connection pipe via connection bolts.

[0006] The device also comprises a first sealing ring, which is installed in two mating connecting pipes and is axially pressed by the ends of the two pipes.

[0007] The inner side surface of each connecting disk is provided with a second sealing ring, and after the two connecting disks are aligned and pressed, the second sealing ring is pressed tightly.

[0008] The inner wall of each connecting pipe is provided with a third sealing ring.

[0009] The compressible length of the compression spring is smaller than the depth of the groove.

[0010] A layer of polytetrafluoroethylene plate is attached to the inner side surface of the connection plate, the inside of the groove and the hill-shaped protrusion.

[0011] The invention enables the connected pipeline to have an activity margin for rotation around the axis and radial displacement, and can effectively buffer the vibration transmitted to the pipeline itself, thereby avoiding leakage at the pipeline interface due to displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the present invention.

[0013] Figure 2 It is a front cross-sectional view of the present invention when the pipeline is aligned.

[0014] Figure 3 It is a front cross-sectional view of the present invention when the pipeline is misaligned.

[0015] Figure 4 for Figure 2 Enlarged view of position A in the middle.

[0016] Figure 5 for Figure 3 Enlarged view of position B in the middle. DETAILED DESCRIPTION

[0017] In conjunction with the accompanying drawings, the present invention includes two groups of connection units, which are respectively installed at the ends of two pipes to be connected, and then the two groups of connection units are connected to achieve the connection of the pipe ends; each group of connection units includes a connection pipe 1, and the outer wall of one end of the connection pipe 1 is coaxially provided with an annular connection disk 2 extending outward, the connection pipe 1 and the connection disk 2 are integrally formed, the end of the pipe to be connected is inserted into the connection pipe 1 and fixed, the outer wall of the pipe is sealed with the inner wall of the connection pipe 1, and then the connection disks 2 on the connection pipes 1 of the two groups of connection units are coaxially matched to achieve the connection of the pipes, the connection unit also includes an annular pressure plate 3, the pressure plate 3 is sleeved on the outside of the connection pipe 1, the two pressure plates 3 of the two groups of connection units clamp the two connection disks 2 in the middle, the two pressure plates 3 are connected and pressed by flange bolts 4, so that the two connection disks 2 are pressed; the annular hole of the pressure plate 3 is larger than the outer diameter of the connection pipe 1, so that the connection pipe 1 and The connecting disc 2 has a margin for radial relative movement with the pressure plate 3, thereby providing a margin for radial displacement of the pipeline port; a plurality of arc-shaped grooves 5 are evenly distributed on the circumference of the outer surface of each connecting disc 2, and a plurality of mound-like protrusions 6 of the same shape and size as the grooves 5 are evenly distributed on the circumference of the inner surface of each pressure plate 3. The mound-like protrusions 6 on the pressure plate 3 correspond one-to-one with the grooves 5 on the connecting disc 2 on the same side. When the pressure plate 3 is tightened, the mound-like protrusions 6 are pressed into the grooves 5. Compression springs 7 are installed on the flange bolts 4 of the two pressure plates 3. The compression springs 7 are located between the nuts and the pressure plates 3, so that the two pressure plates 3 have elastic margin for axial movement while being tightened. When the two connecting discs 2 are radially displaced or rotated around the axis, the mound-like protrusions 6 are misaligned with the grooves 5, which will push the two pressure plates 3 outward. In this case, the pressure of the compression springs 7 will prompt the mound-like protrusions 6 to realign with the grooves 5, thereby applying a restoring force to the misaligned connecting discs 2.

[0018] Each group of connection units also includes a clamp 8, which is clamped on the outer wall of the pipeline. A plurality of connection blocks 9 are fixed to the outer wall of the clamp 8. The connection blocks 9 are connected to the tail of the connection pipe 1 via connection bolts 10, thereby axially fixing the connection pipe 1 to the pipeline.

[0019] It also includes a first sealing ring 11, which is installed in the two matching connecting pipes 1 and is axially squeezed by the ends of the two pipes. The first sealing ring 11 is pressed tightly against the pipe ports and expands under the action of pressure to press against the inner wall of the connecting pipe 1 to form a primary seal.

[0020] The inner side surface of each of the connection disks 2 is provided with a second sealing ring 12 . After the two connection disks 2 are aligned and pressed, the second sealing ring 12 is pressed to form a secondary seal at the two connection disks 2 .

[0021] The inner wall of each connecting pipe 1 is provided with a third sealing ring 13 to form a secondary seal between the inner wall of the connecting pipe 1 and the outer wall of the pipeline.

[0022] The compressible length of the compression spring 7 is smaller than the depth of the groove 5 , so that the hillock 6 cannot be completely moved out of the groove 5 , thereby limiting the radial displacement and axial rotation of the two pressure plates 3 .

[0023] A layer of polytetrafluoroethylene plate 14 is mounted on the inner side surface of the connection plate 2, i.e., the mating side, the inside of the groove 5, and the hill-like protrusion 6, which has the characteristics of wear resistance, corrosion resistance and low friction.

[0024] When the present invention is used to connect pipes, the first sealing ring 11 is first installed at the pipe mouth of the connecting pipe 1. An annular groove is provided at the pipe mouth of the connecting pipe 1 for installing the first sealing ring 11, so that the first sealing ring 11 cannot be axially displaced, and the first sealing ring 11 is ensured to be located at the interface after the two connecting pipes 1 are connected. Similarly, the second sealing ring 12 and the third sealing ring are installed in place one by one, and then the two connecting plates 2 are matched, and the two pressure plates 3 are sleeved on the connecting pipe 1, so that the hillock protrusions 6 correspond to the grooves 5 one by one, and then the flange bolts 4 are used to tighten the two pressure plates 3. Connect and tighten so that the compression spring 7 has a pre-compression amount to apply sufficient pressure to the pressure plate 3. At the same time, the compression spring 7 cannot be compressed to the limit, so that the compression spring 7 has a margin for further compression; then fasten the clamp 8 to the pipe so that the two clamps 8 are at an equal distance from the pipe port, and finally insert the pipe end into the connecting pipe 1, and use the connecting bolt 10 to connect the clamp 8 to the tail of the connecting pipe 1 at the same end and tighten it. When tightening, the pipe pair continues to be inserted into the connecting pipe 1 until the ends of the two pipes are pressed against the first sealing ring 11, and the pipe connection is completed.

[0025] When the two pipes are aligned, the two connecting pipes 1 are coaxially aligned, and the mound-like protrusions 6 on the two pressure plates 3 are pressed into the grooves 5 one by one. When the pipes are vibrated and the two pipes rotate relative to each other around the axis or shift radially, the grooves 5 and the mound-like protrusions 6 are misaligned, thereby pushing the two pressure plates 3 outward to increase the distance between the two pressure plates 3, and the compression springs 7 are compressed to buffer and absorb energy, so that the connected pipes have a buffer margin for rotation and radial shift. After the grooves 5 and the mound-like protrusions 6 are misaligned, under the action of the pressure of the compression springs 7, the grooves 5 and the mound-like protrusions 6 have a tendency to realign, thereby returning the pipes after rotation or shift.

[0026] The present invention adopts two pairs of pressure plates 3 to connect the pipelines by combining and pressing them together. While ensuring the connection and sealing, the connected pipelines have a movable margin for rotation around the axis and radial displacement, thereby effectively buffering the vibration transmitted to the pipeline itself and avoiding leakage at the pipeline interface due to displacement. Moreover, through the cooperation between the hill-like protrusion 6 and the groove 5, the dislocated pipeline automatically returns to its original position, forming a durable and effective universal vibration buffering structure.

[0027] The present invention can also be used in conjunction with a conventional external buffer device to minimize the transmission of external vibrations to the pipeline itself.

Claims

1. A hydraulic pipeline joint with a dislocation buffering function, comprising two sets of connection units, characterized in that: Each group of connection units comprises a connection pipe (1), the outer wall of one end of the connection pipe (1) is coaxially provided with an annular connection plate (2) extending outward, the connection pipe (1) and the connection plate (2) are integrally formed, the end of the pipeline to be connected is inserted into the connection pipe (1) and fixed, and then the connection plates (2) on the connection pipes (1) of the two groups of connection units are coaxially matched to achieve the connection of the pipelines, and the connection unit also comprises an annular pressure plate (3), the pressure plate (3) is sleeved outside the connection pipe (1), the two pressure plates (3) of the two groups of connection units sandwich the two connection plates (2), and the two pressure plates (3) are connected and pressed via flange bolts (4); the annular hole of the pressure plate (3) is larger than the outer diameter of the connection pipe (1), so that The connecting pipe (1) and the connecting plate (2) have a margin for radial relative movement with the pressure plate (3); a plurality of arc-shaped grooves (5) are evenly distributed on the circumference of the outer surface of each connecting plate (2); a plurality of hillock-shaped protrusions (6) of the same shape and size as the grooves (5) are evenly distributed on the circumference of the inner surface of each pressure plate (3); the hillock-shaped protrusions (6) on the pressure plate (3) correspond one-to-one with the grooves (5) on the connecting plate (2) on the same side; a compression spring (7) is installed on the flange bolts (4) of the two pressure plates (3); the compression spring (7) is located between the nut and the pressure plate (3), so that the two pressure plates (3) have an elastic margin for axial movement when being compressed; the compressible length of the compression spring (7) is less than the depth of the groove (5); and a first sealing ring (11) is also included, which is installed in the two matching connecting pipes (1) and is axially squeezed by the ends of the two pipes; The two pressure plates are combined and pressed together to connect the pipelines. While ensuring connectivity and sealing, the connected pipelines have room for rotation around the axis and radial displacement, thereby effectively buffering the vibration transmitted to the pipeline itself and avoiding leakage at the pipeline interface due to displacement. The misaligned pipelines automatically return to their original positions through the cooperation of the mound-like protrusions and grooves, forming a long-lasting and effective universal vibration buffering structure.

2. A hydraulic pipe joint with misalignment buffering function according to claim 1, characterized in that: Each group of connection units also includes a clamp (8), the clamp (8) is clamped on the outer wall of the pipe, a plurality of connection blocks (9) are fixed to the outer wall of the clamp (8), and the connection blocks (9) are connected to the rear end of the connection pipe (1) via connection bolts (10).

3. The hydraulic pipe joint with misalignment buffering function according to claim 1, characterized in that: A second sealing ring (12) is mounted on the inner side of each connecting disk (2), and after the two connecting disks (2) are aligned and pressed, the second sealing ring (12) is pressed.

4. The hydraulic pipe joint with misalignment buffering function according to claim 1, characterized in that: The inner wall of each connecting pipe (1) is provided with a third sealing ring (13).

5. The hydraulic pipe joint with misalignment buffering function according to claim 1, characterized in that: A layer of polytetrafluoroethylene plate (14) is attached to the inner side surface of the connection plate (2), the inside of the groove (5) and the hill-shaped protrusion (6).

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