Anti-pull-off high-pressure-resistant rubber hose structure

Abstract

The utility model relates to an anti-pull-off high-pressure-resistant rubber hose structure, a steel wire bundle winding interlayer is fixed at the joint part of a high-pressure rubber hose by adopting a tooth-shaped groove fixing lantern ring, the tooth number of the tooth-shaped groove fixing lantern ring is the same as the number of steel wire bundles of a steel wire bundle winding layer, and the tooth-shaped groove fixing lantern ring is used for fixing and tensioning the steel wire bundles; an upper guide block and a lower guide block are arranged on the inner side of the tooth-shaped groove fixing lantern ring, the guide blocks are screwed into the tube core from the outer side after the tube core is sleeved with the tooth-shaped groove fixing lantern ring, and the guide blocks are embedded into guide grooves in the outer side of the tube core to prevent the tooth-shaped groove fixing lantern ring from rotating. A spiral guide groove is milled in the outer side of the pipe core in advance, and the thread pitch and the spiral direction of the spiral guide groove are the same as those of the steel wire bundle winding layer. According to the anti-pull-off high-pressure-resistant rubber pipe structure, the stability of a hydraulic connector structure in the high-temperature and high-pressure environment can be improved, and particularly the safety problem caused by pull-off is prevented.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic connection accessories technology, specifically to a high-pressure resistant hose structure that is resistant to pull-out. Background Technology

[0002] High-pressure hoses are the most common connecting components in hydraulic systems. The hoses themselves are flexible, with diverse connector types, allowing them to connect to complex equipment in various harsh industrial environments to form hydraulic systems and provide power. Therefore, high-pressure hoses used in hydraulic systems must possess stability and high applicability. The key to high-pressure hoses lies in the connector. The technical challenge is that the high-pressure hose connector is a rigid metal component, while the hose itself is made of non-metallic rubber. Ensuring a tight bond between these two materials, avoiding safety hazards caused by connection problems, and guaranteeing good sealing, no leakage, and no deformation under high temperature and pressure conditions inside the hose, while preventing relative displacement between the two materials and preventing detachment due to excessive pressure, has always been a technical challenge in this field. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a high-pressure resistant hose structure that prevents pull-out, thereby improving the stability of hydraulic joint structures under high temperature and high pressure environments, and in particular, preventing pull-out and the resulting safety issues.

[0004] A high-pressure resistant hose structure with pull-out prevention features a toothed groove fixing collar at the hose joint to secure the wire bundle winding layer. The number of teeth on the toothed groove fixing collar is the same as the number of wire bundles in the wire bundle winding layer, used for fixing and tensioning the wire bundles. Two guide blocks are provided on the inner side of the toothed groove fixing collar. After the toothed groove fixing collar covers the hose core, the guide blocks are screwed in from the outside and embedded in the guide groove on the outside of the hose core to prevent rotation of the toothed groove fixing collar. A spiral guide groove is pre-milled on the outside of the hose core, with the pitch and spiral direction of the spiral guide groove being the same as that of the wire bundle winding layer.

[0005] Furthermore, the outer layer of the core is covered with a 2-4 mm thick layer of hydrogenated nitrile rubber.

[0006] Furthermore, the outer side of the wire bundle winding layer is covered with a hydrogenated nitrile rubber layer, which completely covers the wire bundle winding layer and the toothed groove fixing collar.

[0007] Furthermore, the ends are fitted with tubular joint protective sleeves and welded with any one of flanges, grout joints, or threaded pipe joints to form a high-pressure resistant hose structure that is resistant to pull-out. Attached Figure Description

[0008] Figure 1 This is an axial cross-sectional view of the three-layer process joint structure.

[0009] Figure 2 This is a schematic diagram of a toothed groove retaining collar.

[0010] Figure 3 This is a schematic diagram of the die.

[0011] Figure 4 This is a schematic diagram of assembling a toothed groove fixing collar with a rubber-coated tube core and winding a high-strength flexible steel wire bundle.

[0012] Figure 5 This is a schematic diagram of a steel wire bundle winding sandwich layer obtained by winding a high-strength flexible steel wire bundle.

[0013] Figure 6 This is a schematic diagram of the protective sleeve on the tubular connector.

[0014] Figure 7 This is a schematic diagram of welding the flange.

[0015] Figure 8 This is a schematic diagram of the complete connector tube.

[0016] Figure label:

[0017] 1. Flange; 2. Pipe core; 3. Outer toothed groove fixing collar; 4. Middle toothed groove fixing collar; 5. Inner toothed groove fixing collar; 6. Inner rubber layer; 7. Inner steel wire bundle winding layer; 8. First middle rubber interlayer; 9. Middle steel wire bundle winding layer; 10. Second middle rubber interlayer; 11. Outer steel wire bundle winding layer; 12. Outer rubber protective layer; 13. Pipe joint protective sleeve; 14. High-strength flexible steel wire bundle. Detailed Implementation

[0018] The following detailed description of a high-pressure resistant, pull-out-proof hose structure of this utility model, with reference to the accompanying drawings and specific embodiments, is provided in further detail: Example

[0019] A high-pressure resistant, pull-out-proof hose structure, the processing method of which is as follows:

[0020] The core 2, covered with the inner rubber layer 6, is fitted onto the outer side of the inner toothed groove fixing collar 5. A high-strength flexible steel wire bundle 14 is then wound around it to form an inner steel wire bundle winding layer 7. The high-strength flexible steel wire bundle 14 is embedded in the toothed groove of the inner toothed groove fixing collar 5. The inner toothed groove fixing collar 5 is rotated to tighten the steel wire bundle winding layer. The end of the tightened inner steel wire bundle winding layer 7 is welded and fixed to the toothed groove fixing collar. A hydrogenated nitrile first intermediate rubber interlayer 8 is then wrapped around the outer side of the inner steel wire bundle winding layer 7, completely enclosing both the inner steel wire bundle winding layer 7 and the inner toothed groove fixing collar 5. Similarly, a second intermediate rubber interlayer 10 is then wrapped around the end of the first intermediate rubber interlayer 8 after a middle toothed groove fixing collar 4 and a middle steel wire bundle winding layer 9 are installed. Similarly, an outer toothed groove fixing collar 3 and an outer steel wire bundle winding layer 11 are then installed at the end of the second middle rubber interlayer 10, and then an outer rubber protective layer 12 is wrapped around it. Adhesive is brushed onto the end, and a metal tubular joint protective sleeve 13 is put on. Then the entire hose is vulcanized to make the steel wire bundle winding layer and the tube body contact layer evenly bonded and fused. Finally, the flange 1 is welded to form a high-pressure hose assembly.

[0021] Furthermore, the number of teeth on the toothed groove fixing collar is the same as the number of steel wire bundles in the corresponding layer of the steel wire bundle winding layer.

[0022] Furthermore, two guide blocks are provided on the inner side of the toothed groove fixing collar. After the toothed groove fixing collar covers the tube core, the guide blocks are screwed in from the outside and embedded in the guide groove on the outside of the tube core to prevent the toothed groove fixing collar from rotating.

[0023] Furthermore, the outer surfaces of the core 2, the first middle rubber interlayer 8, and the second middle rubber interlayer 10 are all pre-milled with spiral guide grooves, and the pitch and spiral direction of the spiral guide grooves are the same as those of the wire bundle winding layer.

[0024] A series of hose assemblies with a total length of 4m were tested. The pressure testing equipment was a hydraulic servo pulse test bench, and the test time was 30 hours. The joint parts were tested using a salt spray tester for 100 hours. The hose diameter deformation and hose expansion / contraction deformation were measured before and after the experiment (the maximum pressure for hoses with a diameter of less than 100mm was controlled below 50MPa, and for hoses with a diameter of 150mm-250mm, the pressure was controlled below 150MPa). The results are shown in the table below:

[0025]

[0026] The embodiments of the present utility model have been described in detail above. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and should also be considered within the protection scope of the present utility model.

Claims

1. A high-pressure resistant, pull-out-proof hose structure, characterized in that, The high-pressure hose connector uses a toothed groove fixing collar to fix the steel wire bundle winding layer. The number of teeth on the toothed groove fixing collar is the same as the number of steel wire bundles in the steel wire bundle winding layer. It is used to fix and tension the steel wire bundle. There are two guide blocks on the inner side of the toothed groove fixing collar. After the toothed groove fixing collar fits the tube core, the guide blocks are screwed in from the outside and embedded in the guide groove on the outside of the tube core to prevent the toothed groove fixing collar from rotating. The outside of the tube core is pre-milled with a spiral guide groove. The pitch and spiral direction of the spiral guide groove are the same as those of the steel wire bundle winding layer.

2. The anti-pull-out high-pressure resistant hose structure according to claim 1, characterized in that, The outer layer of the core is covered with a 2-4 mm thick layer of hydrogenated nitrile rubber.

3. The anti-pull-out high-pressure resistant hose structure according to claim 2, characterized in that, The outer side of the wire bundle winding layer is covered with a hydrogenated nitrile rubber layer, which completely covers the wire bundle winding layer and the toothed groove fixing collar.

4. The anti-pull-out high-pressure resistant hose structure according to claim 3, characterized in that, The ends are fitted with tubular joint protective sleeves and welded with flanges, grout joints, or threaded pipe joints to form a high-pressure resistant hose structure that is resistant to pull-out.

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