Processing method of anti-pull-off high-pressure-resistant rubber hose structure

Abstract

The invention relates to a processing method of an anti-pull-out high-pressure-resistant rubber hose structure, a steel wire bundle winding interlayer is fixed at a high-pressure rubber hose joint part 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-out high-pressure-resistant rubber hose structure obtained through the method, 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-out is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic connection accessories, and in particular to a method for processing a pull-out-proof high-pressure resistant hose structure. Background Art

[0002] The joint for hydraulic rubber hose is a connecting element that connects hydraulic pipelines with hydraulic pipelines, or between hydraulic pipelines and hydraulic components. The hydraulic joint includes hydraulic joints for hoses and hydraulic joints for hard pipes. One end of the hydraulic hose joint is connected to the hydraulic hose (called the tail end), and the other end is connected to other components (terminals). In order to ensure compatibility and leak-free sealing with other components, the terminal of the hydraulic hose joint needs to be designed in accordance with the general interface standard. The main function of the tail end is to ensure the long-term sealing of the connection between the joint and the hose. The hose itself is flexible and has a variety of joint forms. It can be connected with complex equipment in various harsh industrial environments to form a hydraulic system to provide power for hydraulic equipment. Therefore, the high-pressure hose used in the hydraulic system must have stability and high applicability. The key point of the high-pressure hose is the joint part. The technical difficulty is that the high-pressure hose joint is a rigid metal part, and the hose itself is a non-metallic rubber material. How to make the two materials tightly combined to avoid safety hazards caused by connection problems, and ensure good sealing, no leakage, no deformation under high temperature and high pressure conditions inside the high-pressure hose, no relative position offset between the two materials, and no pull-off due to excessive pressure, has always been a technical difficulty in this field. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for processing an anti-pull-out high-pressure resistant hose structure to improve the stability of the hydraulic joint structure under high temperature and high pressure environments, especially to prevent safety problems caused by pull-out.

[0004] A method for processing an anti-pull-out high-pressure resistant hose structure comprises the following steps: 1) Insert the toothed groove fixing ring on the outside of the tube core; 2) Winding a high-strength flexible steel wire bundle to form a steel wire bundle winding layer, the high-strength flexible steel wire bundle is embedded in the tooth groove of the tooth groove fixing ring, and the tooth groove fixing ring is rotated to tighten the steel wire bundle winding layer; 3) Weld and fix the end of the tensioned wire bundle winding layer to the toothed groove fixing ring.

[0005] Furthermore, the number of teeth of the toothed groove fixing collar is the same as the number of steel wire bundles in the steel wire bundle winding layer.

[0006] Furthermore, two upper and lower guide blocks are arranged on the inner side of the toothed groove fixing ring in step 1), and the guide blocks are screwed in from the outside after the toothed groove fixing ring covers the tube core, and the guide blocks are embedded in the guide groove on the outside of the tube core to prevent the toothed groove fixing ring from rotating.

[0007] Furthermore, a spiral guide groove is pre-milled on the outer side of the tube core in step 1), and the pitch and spiral direction of the spiral guide groove are the same as those of the steel wire bundle winding layer in step 2).

[0008] Furthermore, the outer layer of the tube core in step 1) is coated with a 2-4 mm thick hydrogenated nitrile rubber layer.

[0009] Furthermore, the method further comprises step 4) coating the outer side of the steel wire bundle winding layer with a hydrogenated nitrile rubber layer, and completely coating the steel wire bundle winding layer and the toothed groove fixing ring.

[0010] Furthermore, after the above process, a spiral guide groove can be milled on the outer hydrogenated nitrile rubber layer, and a toothed groove fixing ring can be set again at the end of the outer hydrogenated nitrile rubber layer to repeat the above steps 1) to 4).

[0011] Furthermore, it also includes step 5), brushing adhesive on the end, putting on a tubular joint protective cover, and then vulcanizing the entire hose to make the steel wire bundle winding layer and the pipe body contact layer evenly bonded and fused, and finally welding any one of the flange, oil-repellent joint or threaded pipe joint to form a high-pressure hose assembly.

[0012] The method provided by the present invention adopts a toothed groove fixing ring to fix the wire bundle winding interlayer at the joint of the high-pressure rubber hose, the number of teeth of the toothed groove fixing ring is the same as the number of wire bundles in the wire bundle winding layer, and is used for fixing and tensioning the wire bundle, and two upper and lower guide blocks are arranged on the inner side of the toothed groove fixing ring, and the guide blocks are screwed into from the outside after the toothed groove fixing ring is sleeved on the tube core, and the guide blocks are embedded in the guide groove on the outside of the tube core to prevent the toothed groove fixing ring from rotating; a spiral guide groove is pre-milled on the outside of the tube core, and the pitch and spiral direction of the spiral guide groove are the same as those of the wire bundle winding layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a flow chart of a method for processing a pull-out resistant high-pressure hose structure.

[0014] Figure 2 It is an axial cross-sectional view of a three-layer process joint structure obtained by implementing the method for processing the anti-pullout high-pressure resistant hose structure of the present invention.

[0015] Figure 3 It is a schematic diagram of the toothed groove fixing collar.

[0016] Figure 4 It is a schematic diagram of the tube core.

[0017] Figure 5 It is a schematic diagram of assembling a toothed groove fixing ring on a tube core covered with a rubber layer and winding a high-strength flexible steel wire bundle.

[0018] Figure 6It is a schematic diagram of winding a high-strength flexible steel wire bundle to obtain a steel wire bundle winding interlayer.

[0019] Figure 7 It is a schematic diagram of putting on the protective cover of the tubular joint.

[0020] Figure 8 This is a schematic diagram of the welding flange.

[0021] Fig. 9 is a schematic diagram of the complete joint pipe.

[0022] Reference numerals: Flange 1, pipe core 2, outer toothed groove fixing ring 3, middle toothed groove fixing ring 4, inner toothed groove fixing ring 5, inner rubber layer 6, inner steel wire bundle winding layer 7, first middle rubber interlayer 8, middle steel wire bundle winding layer 9, second middle rubber interlayer 10, outer steel wire bundle winding layer 11, outer rubber protective layer 12, tubular joint protective cover 13, high-strength flexible steel wire bundle 14. DETAILED DESCRIPTION

[0023] The following is a further detailed description of a method for processing an anti-pull-out high-pressure resistant hose structure of the present invention in conjunction with the accompanying drawings and specific embodiments: Example

[0024] A method for processing a pull-out resistant high-pressure hose structure is disclosed. The outer side of a tube core 2 coated with an inner rubber layer 6 is inserted into an inner toothed groove fixing collar 5, and a high-strength flexible steel wire bundle 14 is wound to form an inner steel wire bundle winding layer 7. The high-strength flexible steel wire bundle 14 is embedded in the tooth 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, and the end of the tightened inner steel wire bundle winding layer 7 is welded and fixed to the toothed groove fixing collar. The outer side of the inner steel wire bundle winding layer 7 is coated with a first middle rubber interlayer 8 of hydrogenated nitrile butadiene, and the inner steel wire bundle winding layer 7 and the inner toothed groove fixing collar 5 are completely coated therein. Similarly, the end of the first middle rubber interlayer 8 is provided with a middle toothed groove fixing collar 4 and a middle steel wire bundle winding layer 9, and then coated with a second middle rubber interlayer 10. Similarly, the end of the second middle rubber interlayer 10 is provided with an outer toothed groove fixing ring 3 and an outer steel wire bundle winding layer 11, and then covered with an outer rubber protective layer 12. Adhesive is applied to the end, and a metal pipe joint protective cover 13 is put on. After that, the hose is vulcanized as a whole to make the steel wire bundle winding layer and the pipe body contact layer evenly bonded and fused, and finally the flange 1 is welded to form a high-pressure hose assembly.

[0025] Furthermore, the number of teeth of the toothed groove fixing collar is the same as the number of steel wire bundles in the steel wire bundle winding layer.

[0026] Furthermore, two upper and lower guide blocks are arranged on the inner side of the toothed groove fixing ring. The guide blocks are screwed in from the outside after the toothed groove fixing ring covers the tube core. The guide blocks are embedded in the guide groove outside the tube core to prevent the toothed groove fixing ring from rotating.

[0027] Furthermore, spiral guide grooves are pre-milled on the outer surfaces of the tube core 2, the first middle rubber interlayer 8 and the second middle rubber interlayer 10, and the pitch and spiral direction of the spiral guide grooves are the same as those of the steel wire bundle winding layer.

[0028] A series of hose assemblies were tested, with a total length of 4m. The pressure test equipment was a hydraulic servo pulse test bench, the test time was 30 hours, and the joint part was a salt spray test machine with a test time of 100 hours. The hose diameter deformation and hose expansion and contraction deformation are the hose deformation variables before and after the experiment (the maximum pressure of hoses with a diameter of less than 100mm is controlled below 50Mpa, and the hoses with a diameter of 150mm-250mm are controlled below 150Mpa). The results are as follows:

[0029] The examples of the present invention are described in detail above in conjunction with the embodiments, but the present invention is not limited to the above examples. Various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention, and should also be regarded as the protection scope of the present invention.

Claims

1. A method for processing a pull-out resistant high-pressure hose structure, characterized in that: The following steps are involved: 1) Insert the toothed groove fixing ring on the outside of the tube core; 2) Winding a high-strength flexible steel wire bundle to form a steel wire bundle winding layer, the high-strength flexible steel wire bundle is embedded in the tooth groove of the tooth groove fixing ring, and the tooth groove fixing ring is rotated to tighten the steel wire bundle winding layer; 3) Weld and fix the end of the tensioned wire bundle winding layer to the toothed groove fixing ring.

2. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 1, characterized in that: The number of teeth of the toothed groove fixing collar is the same as the number of steel wire bundles in the steel wire bundle winding layer.

3. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 2, characterized in that: The inner side of the toothed groove fixing ring in step 1) is provided with two upper and lower guide blocks, which are screwed in from the outside after the toothed groove fixing ring covers the tube core, and the guide blocks are embedded in the guide groove outside the tube core to prevent the toothed groove fixing ring from rotating.

4. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 3, characterized in that: The outer side of the tube core in step 1) is pre-milled with a spiral guide groove, and the pitch and spiral direction of the spiral guide groove are the same as those of the steel wire bundle winding layer in step 2).

5. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 4, characterized in that: The outer layer of the tube core in the step 1) is coated with a 2-4 mm thick hydrogenated nitrile rubber layer.

6. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 5, characterized in that: Furthermore, the method further comprises step 4) coating the outer side of the steel wire bundle winding layer with a hydrogenated nitrile rubber layer, and completely coating the steel wire bundle winding layer and the toothed groove fixing ring.

7. The method for processing the anti-pull-out high-pressure resistant hose structure according to claim 6, characterized in that: After the above process, a spiral guide groove can be milled on the outer hydrogenated nitrile rubber layer, and a toothed groove fixing ring can be set again at the end of the outer hydrogenated nitrile rubber layer to repeat the above steps 1) to 4).

8. The method for processing a pull-out resistant high pressure hose structure according to any one of claims 1 to 7, characterized in that: It also includes step 5), brushing adhesive on the end, putting on a tubular joint protective cover, then vulcanizing the entire hose to make the steel wire bundle winding layer and the pipe body contact layer evenly bonded and fused, and finally welding any one of the flange, oil-repellent joint or threaded pipe joint to form a high-pressure hose assembly.

Images