Rigid rotatable pipeline connecting device

Abstract

The invention provides a rigid rotatable pipeline connecting device, and belongs to the technical field of hydraulic system pipeline connection. The problem that high-pressure sealing performance, low swing torque, long service life and high reliability cannot be met at the same time in the prior art is solved. The device comprises a fixed sleeve, a rotary core shaft, an anti-falling pressing plate, a first pipeline and a second pipeline, a first inner hole and a pipe hole are formed in the fixed sleeve, the first inner hole is communicated with the pipe hole, the rotary core shaft is installed in the first inner hole, and the first pipeline is installed in the pipe hole and fixed through a third bolt; the rotating core shaft is of a hollow tubular structure, and a second inner hole, a flange and a sealing assembly are arranged on the rotating core shaft; the inner edge of the anti-disengaging pressing plate is pressed and covered on the flange, the anti-disengaging pressing plate is fixed on the fixing sleeve through a second bolt, the second pipeline is fixed in the second inner hole, and the part, inserted into the first inner hole, of the rotating mandrel is provided with a sealing assembly. The problems that high-pressure sealing performance, low swing torque, long service life and high reliability cannot be met at the same time are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system pipeline connection technology, and in particular to a rigid rotatable pipeline connection device. Background Technology

[0002] In hydraulic transmission and control systems, the oscillating actuator is a common actuator, widely used in applications such as turbine guide vane control, inlet valve switching control, and various oscillating cylinder drives. This type of device oscillates back and forth around a central axis during operation.

[0003] Currently, high-pressure steel wire reinforced hoses are commonly used for pipeline connections between such equipment and hydraulic systems. The hoses rely on their inherent flexibility to accommodate the equipment's oscillating displacement. However, as system operating pressures continue to increase, to ensure safety, the hoses must have multiple layers of steel wire braiding added to enhance their pressure-bearing capacity. This directly leads to an increase in hose rigidity and a significant decrease in flexibility. This "rigidified" high-pressure hose has several inherent drawbacks under reciprocating oscillating conditions:

[0004] First, when a rigid hose repeatedly swings with the relay, its bending stiffness resists displacement, requiring not only a larger swing torque but also generating enormous alternating stress inside the hose. This stress easily concentrates at the joint crimping points or the points where the hose repeatedly bends, causing the steel wire layer to gradually break due to metal fatigue, ultimately leading to serious failures such as hose bulging and bursting, significantly reducing reliability.

[0005] Secondly, rigid high-pressure hoses require a larger bending radius to operate safely. In compact equipment layouts, this may not provide sufficient space for movement, easily leading to friction or interference between the hose and surrounding components, accelerating outer wear, and posing safety hazards. Furthermore, the rigid hose may not achieve an ideal bending shape, thus generating undue additional torque on the actuator, affecting the smoothness and accuracy of equipment movement.

[0006] Furthermore, under the combined harsh conditions of high pressure and continuous oscillation, the service life of high-pressure hoses is difficult to predict, thus requiring frequent inspections and replacements. This not only increases the cost of spare parts but also reduces equipment availability due to downtime for hose replacement, resulting in high overall maintenance costs.

[0007] To address the aforementioned issues, existing technologies have employed rigid pipes in conjunction with rotary joints. However, traditional rotary joints suffer from problems such as complex sealing structures, a trade-off between pressure-bearing capacity and rotational flexibility, high costs, and insufficient adaptability during multi-degree-of-freedom oscillations.

[0008] In summary, there is an urgent need to propose a rigid rotatable pipeline connection device to solve the problem that existing technologies cannot simultaneously meet the requirements of high-pressure sealing performance, low swing torque, long service life, and high reliability. Summary of the Invention

[0009] A brief overview of the invention is given below to provide a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0010] In view of this, in order to solve the problem that the existing technology cannot simultaneously meet the requirements of high pressure sealing performance, low swing torque, long life and high reliability, the present invention provides a rigid rotatable pipeline connection device.

[0011] A rigid rotatable pipeline connection device includes a fixed sleeve, a rotating mandrel, an anti-detachment pressure plate, a first pipeline, and a second pipeline.

[0012] The fixed sleeve is provided with a first inner hole and a pipe hole, which are connected. The rotating mandrel is installed in the first inner hole, and the first pipe is installed in the pipe hole and fixed by a third bolt.

[0013] The rotating mandrel is a hollow tubular structure, and has a second inner hole, a flange and a sealing assembly. The inner edge of the anti-detachment pressure plate presses against the flange and is fixed to the fixing sleeve by the second bolt. The second pipeline is fixed in the second inner hole, and the part of the rotating mandrel inserted into the first inner hole is provided with a sealing assembly.

[0014] Furthermore, the sealing assembly includes support bearings and sealing rings. Two support bearings are provided on a portion of the outer diameter of the rotating spindle within the first inner hole, and two sealing rings are provided between the two support bearings.

[0015] Furthermore, the fixing sleeve is mounted on the external device by the first bolt.

[0016] Furthermore, the anti-detachment pressure plate has a segmented structure.

[0017] Furthermore, the supporting bearing is a sliding bearing or a rolling bearing.

[0018] The present invention has the following advantages over the prior art:

[0019] 1. This invention replaces the flexible bending of the hose with a rigid rotating structure, eliminating the risk of fatigue-induced pipe bursts caused by the metal wire layer; combined with dynamic sealing technology, it achieves a balance between high pressure tolerance and low torque flexible swing, adapting to the highest system pressure without generating additional load on the equipment, thus significantly improving service life and operational reliability.

[0020] 2. The rigid connection design of this invention makes the pipeline layout simpler and more compact, eliminating the need for a large bending radius and effectively avoiding the risk of interference with surrounding components; at the same time, it can withstand radial loads and adapt to a certain sway angle, with better adaptability than traditional single-free rotary joints.

[0021] 3. Because the lifespan of this invention far exceeds that of traditional high-pressure hoses, it significantly reduces the frequency of preventative maintenance and replacement, directly lowering the overall maintenance cost. At the same time, it reduces equipment downtime and improves operating efficiency. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a structural schematic diagram of a rigid rotatable pipe connection device;

[0024] Figure 2 for Figure 1 Exploded view of the structure;

[0025] Figure 3 This is a schematic diagram of the fixed sleeve structure;

[0026] Figure 4 A diagram showing the positional relationship between the rotating mandrel and the second pipeline;

[0027] Figure 5 This is a diagram showing the location relationships of devices installed on external equipment.

[0028] In the diagram: 1-fixed sleeve, 2-rotating mandrel, 3-anti-detachment pressure plate, 4-second bolt, 5-first pipeline, 6-second pipeline, 7-third bolt, 8-first bolt, 9-external equipment, 101-first inner hole, 102-pipe hole, 201-second inner hole, 202-flange, 203-support bearing, 204-sealing ring. Detailed Implementation

[0029] To make the technical solutions and advantages of the embodiments of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0030] Examples, References Figure 1-5 This embodiment describes a rigid rotatable pipe connection device, which includes a fixed sleeve 1, a rotating mandrel 2, an anti-detachment pressure plate 3, a first pipe 5, and a second pipe 6.

[0031] The fixed sleeve 1 is provided with a first inner hole 101 and a pipe hole 102, which are connected. The rotating spindle 2 is installed in the first inner hole 101, and the first pipe 5 is installed in the pipe hole 102 and fixed by the third bolt 7.

[0032] The rotating mandrel 2 is a hollow tubular structure. The rotating mandrel 2 is provided with a second inner hole 201, a flange 202 and a sealing assembly. The inner edge of the anti-detachment pressure plate 3 presses against the flange 202 and the anti-detachment pressure plate 3 is fixed to the fixing sleeve 1 by the second bolt 4. The second pipeline 6 is fixed in the second inner hole 201. The part of the rotating mandrel 2 inserted into the first inner hole 101 is provided with a sealing assembly.

[0033] Furthermore, the sealing assembly includes a support bearing 203 and a sealing ring 204. The rotating spindle 2 has two support bearings 203 on a portion of its outer diameter inside the first inner hole 101, and two sealing rings 204 are provided between the two support bearings 203.

[0034] Furthermore, the fixing sleeve 1 is mounted on the external device 9 by the first bolt 8.

[0035] Furthermore, the anti-detachment pressure plate 3 has a segmented structure.

[0036] Furthermore, the support bearing 203 is a sliding bearing or a rolling bearing.

[0037] Furthermore, the sealing ring 204 is made of a low-friction, high-wear-resistant sealing material.

[0038] The working principle of this invention is as follows:

[0039] The fixed sleeve 1 is installed on the external equipment 9 by the first bolt 8. The first pipeline 5, as the inlet or outlet of the pressure medium, is fixed in the pipe hole 102 by the third bolt 7. The second pipeline 6 is fixed in the second inner hole 201 and connected to the equipment that needs to swing. When the equipment swings, the equipment drives the second pipeline 6 and the rotating spindle 2 to rotate around the axis, while the fixed sleeve 1 and the first pipeline 5 remain stationary.

[0040] The relative rotation between the rotating mandrel 2 and the fixed sleeve 1 is supported by the support bearing 203, ensuring flexible rotation; the high-pressure seal between the two is achieved by the sealing ring 204 to prevent leakage of the pressure medium. The anti-detachment pressure plate 3 effectively prevents the rotating mandrel 2 from detaching from the fixed sleeve 1 under pressure.

[0041] By replacing the flexible bending of the hose with a rigid rotating structure in this invention, the risk of pipe rupture due to fatigue is eliminated at the source. Combined with dynamic sealing technology, it achieves a balance between high pressure resistance and low torque flexible swing, adapting to the highest system pressure without imposing additional loads on the equipment, thus significantly improving service life and operational reliability. At the same time, the rigid connection design makes the pipeline layout simpler and more compact, eliminating the need for a large bending radius and effectively avoiding the risk of interference with surrounding components. It can also withstand radial loads and adapt to a certain sway angle, with adaptability superior to traditional single-free rotary joints.

[0042] This invention significantly reduces the frequency of preventative maintenance and replacement, directly lowering overall maintenance costs, while also reducing equipment downtime and improving operational efficiency.

[0043] Although the invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A rigid rotatable pipe connection device, characterized in that, It includes a fixed sleeve (1), a rotating mandrel (2), an anti-detachment pressure plate (3), a first pipeline (5), and a second pipeline (6); The fixed sleeve (1) is provided with a first inner hole (101) and a pipe hole (102), which are connected. The rotating spindle (2) is installed in the first inner hole (101), and the first pipe (5) is installed in the pipe hole (102) and fixed by the third bolt (7). The rotating mandrel (2) is a hollow tubular structure. The rotating mandrel (2) is provided with a second inner hole (201), a flange (202) and a sealing assembly. The inner edge of the anti-detachment pressure plate (3) presses against the flange (202) and the anti-detachment pressure plate (3) is fixed to the fixed sleeve (1) by the second bolt (4). The second pipeline (6) is fixed in the second inner hole (201). The part of the rotating mandrel (2) inserted into the first inner hole (101) is provided with a sealing assembly.

2. The rigid rotatable pipe connection device according to claim 1, characterized in that, The sealing assembly includes a support bearing (203) and a sealing ring (204). The rotating spindle (2) has two support bearings (203) on a portion of its outer diameter inside the first inner hole (101), and two sealing rings (204) are provided between the two support bearings (203).

3. The rigid rotatable pipe connection device according to claim 1, characterized in that, The fixed sleeve (1) is mounted on the external device (9) by the first bolt (8).

4. The rigid rotatable pipe connection device according to claim 1, characterized in that, The anti-detachment pressure plate (3) has a segmented structure.

5. The rigid rotatable pipe connection device according to claim 2, characterized in that, The support bearing (203) is a sliding bearing or a rolling bearing.

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