High-strength hydraulic rubber hose assembly component

Abstract

The utility model relates to a high-strength hydraulic rubber hose assembly component which is characterized in that a pipe core of a high-pressure rubber pipe sequentially comprises an inner rubber layer, an inner steel wire winding layer, a plurality of metal pipe cores and a first rubber interlayer outwards, a joint inner sleeve is sleeved outside the end part of the first rubber interlayer, and middle composite layers are outwards arranged on the joint inner sleeve layer by layer; the middle composite layer comprises an adhesive layer and a steel wire winding interlayer, the joint middle layer is fixed and then coated with a rubber interlayer, the steel wire winding interlayer of the outermost middle layer is coated with a rubber outer layer, and the rubber outer layer is sleeved with a joint outer layer sleeve after being coated with the adhesive layer; the joint inner layer sleeve and the joint middle layer of the middle composite layer are multi-petal type combined sleeves, and inverted teeth are arranged on the inner side and the outer side of a single-petal sleeve piece.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic connection accessories, in particular to a high-strength hydraulic rubber hose assembly component. 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 utility model provides a high-strength hydraulic rubber hose assembly component, whose joint is a multi-layer sleeve structure with threaded connection, and each middle layer structure is a sleeve overall structure composed of multiple part split structures. Each middle layer sleeve mechanism is provided with staged anti-retraction teeth. When the multi-part middle layer sleeve structure is combined into a whole sleeve, the anti-retraction teeth are tightly fastened to the outer layer of the winding or braided tube, and a surface treatment agent or a curing agent is added to make the connection between the hose and the joint tightly fastened, thereby achieving an anti-pull-out effect.

[0004] A high-strength hydraulic rubber hose assembly component, wherein:

[0005] The tube core of the high-pressure rubber tube is composed of an inner rubber layer, an inner steel wire winding layer, multiple metal tube cores and a first rubber interlayer in sequence. The end of the first rubber interlayer is fitted with an inner sleeve of the joint. The inner sleeve of the joint is provided with intermediate composite layers outward layer by layer. The intermediate composite layers include an adhesive layer and a steel wire winding interlayer. After the intermediate layer of the joint is fixed, the rubber interlayer is coated on the outside. The steel wire winding interlayer of the outermost intermediate layer is coated with a rubber outer layer. After the rubber outer layer is coated with an adhesive layer, the outer sleeve of the joint is fitted with an outer sleeve of the joint. The intermediate layer of the joint inner sleeve and the intermediate composite layer is a multi-petal combined sleeve, and inverted teeth are provided on the inner and outer sides of the single-petal sleeve.

[0006] Preferably, the outer sleeve of the joint is an integral sleeve, with teeth arranged on the inner side, a smooth outer side, and an outward-turned bell mouth edge arranged on the wide-mouth end.

[0007] Preferably, the middle composite layer is 2 to 7 layers, the tube core is a polytetrafluoroethylene anti-corrosion layer; the inner rubber layer is hydrogenated nitrile rubber; and the adhesive layer is a curing agent with Chemlock or epoxy resin as the base.

[0008] Beneficial technical effects achieved by the utility model:

[0009] The joint of the utility model can be made of 2 to 7 layers of intermediate composite layers according to the purpose of using the high-pressure hose. The inside and outside of the joint are tightly covered with the high-pressure hose material layer, which is tightly engaged with the material layer. Each layer of the joint sleeve is fixed with the hexagonal flat head screw with the tube core as the base to form a whole, and finally an alloy steel flange is welded on the end of the tube core. This kind of joint is closely connected with the high-pressure hose body in the connection mode, which effectively plays a tightening role. Moreover, as the pressure in the pipe increases, the pipe joint connection becomes tighter and more reliable. This joint fundamentally solves the problem of the high-pressure hose joint being pulled out due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional schematic diagram of the end (joint portion) of a high-strength hydraulic rubber hose assembly component;

[0011] Figure 2 It is a cross-sectional schematic diagram without pipe joints;

[0012] Figure 3 It is a schematic diagram of a single-layer three-petal combination sleeve;

[0013] Figure 4 is a schematic diagram of a single-valve sleeve member;

[0014] Figure 5 It is a schematic diagram of the disassembly of the joint components;

[0015] Figure 6 It is a schematic diagram of the assembly of the joint components;

[0016] Figure 7 is a first-view diagram of the outer sleeve of the joint;

[0017] Figure 8 is a second perspective view of the outer sleeve of the joint;

[0018] Fig. 9 It is a schematic diagram of the metal tube core welded with the flange;

[0019] Fig.10 It is an overall schematic diagram of the high-strength hydraulic rubber hose assembly components.

[0020] Reference numerals:

[0021] Inner rubber layer 1, inner steel wire winding layer 2, first rubber interlayer 3, first steel wire winding interlayer 4, second rubber interlayer 5, second steel wire winding interlayer 6, third rubber interlayer 7, third steel wire winding interlayer 8, rubber outer layer 9, tube core 10, joint inner sleeve 11, first joint middle layer 12, second joint middle layer 13, joint outer sleeve 14, metal tube core 15, welding flange 16. DETAILED DESCRIPTION

[0022] The following is a further detailed description of a high-strength hydraulic rubber hose assembly component of the utility model in conjunction with the accompanying drawings and specific embodiments: Example 1

[0023] like Figure 1 As shown, a high-strength hydraulic rubber hose assembly component, wherein:

[0024] The tube core 10 of the high-pressure rubber tube is sequentially provided with an inner rubber layer 1, an inner steel wire winding layer 2, 15 metal tube cores and a first rubber interlayer 3 outwardly. The end of the first rubber interlayer 3 is covered with a joint inner sleeve 11. The joint inner sleeve 11 is sequentially provided with a first adhesive layer and a first steel wire winding interlayer 4 outwardly to fix the first joint intermediate layer 12 and then covered with a second rubber interlayer 5. The second rubber interlayer 5 is sequentially provided with a second adhesive layer and a second steel wire winding interlayer 6 outwardly, and the outer side is covered with a second joint intermediate layer 13 and then covered with a third rubber interlayer 7. The third rubber interlayer 7 is sequentially provided with a third adhesive layer and a third steel wire winding interlayer 8 outwardly and then covered with a rubber outer layer 9. A fourth adhesive layer is provided outside the rubber outer layer and the joint outer sleeve 14 is fitted.

[0025] The middle layer of the joint inner sleeve and the middle composite layer is a multi-petal combined sleeve, made of 40Cr steel, and the inner and outer sides of the single-petal sleeve are both provided with inverted teeth. Figure 2 As shown, three intermediate composite layers are provided, the multi-petal combination sleeve is a three-petal type, and the single-petal sleeve member is formed by longitudinal division at 120° along the central axis of the sleeve. Figure 3 and 5 As shown, the single-flap sleeve member is as Figure 4 The middle composite layer can be set to 2 to 7 layers, the sleeve base of each layer is controlled to be 4-6mm, and the inverted teeth processed inside and outside are controlled to be 2-3mm.

[0026] like Figure 7 and 8 As shown, the outer sleeve 14 of the joint is an integral sleeve, made of 45# steel, with teeth arranged on the inner side, a smooth surface on the outer side, and an outward-turned bell mouth edge arranged on the wide-mouth end.

[0027] When wrapping the steel wire layer of the hose, the tension of the wrapped steel wire must be strictly controlled. Generally, as the thickness of the pipe wall increases, the tension of the outer layer of the wrapped steel wire gradually decreases. The pitch of the steel wire wrapped at the pipe joint should be slightly larger by 0.2-0.5mm than the pitch of the pipe body, so as to facilitate uniform penetration of the adhesive during bonding or vulcanization.

[0028] The tube core is a polytetrafluoroethylene anti-corrosion layer; the inner rubber layer is hydrogenated nitrile rubber; the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer are curing agents based on Chemlock or epoxy resin. Example 2

[0029] A method for manufacturing a high-strength hydraulic rubber hose assembly component, wherein:

[0030] The inner rubber outside the tube core of the high-pressure rubber tube is wrapped with steel wire. At the same time, 15 metal tube cores are wrapped tightly and fixed, and then the outer side is covered with rubber. The outer side is covered with the inner sleeve of the joint and then coated with adhesive. The middle layer of the joint is wrapped with steel wire and then covered with rubber interlayer. The middle composite layer is obtained by repeating the production of multiple middle composite layers. The outermost middle layer of the steel wire wrapped interlayer is covered with the rubber outer layer. The outer rubber outer layer is coated with adhesive and then the outer sleeve of the joint is put on. Finally, the entire pipe and the joint are placed in a vulcanizer for high-temperature vulcanization to form a whole.

[0031] The joint middle layer of the joint inner sleeve and the middle composite layer is a multi-petal combined sleeve, and the inner and outer sides of the single-petal sleeve are both provided with inverted teeth. Figure 2 As shown, three intermediate composite layers are provided, the multi-petal combination sleeve is a three-petal type, and the single-petal sleeve member is formed by longitudinal division at 120° along the central axis of the sleeve. Figure 3 and 5 As shown, the single-flap sleeve member is as Figure 4 As shown. The middle composite layer can be set to 2 to 7 layers, and the base of each sleeve layer is controlled at 4-6mm, and the inverted teeth processed inside and outside are controlled at 2-3mm. The high-pressure hose material layer is tightly coated on the inside and outside of the joint, and it is tightly engaged with the material layer. Each layer of the joint sleeve is fixed with the tube core as the base with hexagonal flat head screws to form a whole (each layer from the inside to the outside is fastened by hexagonal flat head screws to prevent the sleeve from rotating when fixed), and finally an alloy steel flange is welded on the end of the tube core. This type of joint is closely connected to the high-pressure hose body in terms of connection, and it really plays a tightening role. Moreover, as the pressure in the pipe increases, the pipe joint connection becomes tighter and more reliable. This joint fundamentally solves the problem of high-pressure hose joints being pulled out due to excessive pressure.

[0032] like Figure 7 and 8As shown, the outer sleeve 14 of the joint is an integral sleeve, with teeth arranged on the inner side and a smooth outer side, and an outward-turned bell mouth edge arranged on the wide-mouth end to facilitate the bending of the connecting pipe and limit the bending angle.

[0033] The inner interlayer of the joint is made of 40Cr steel, and the outermost sleeve is made of 45# steel. The inner and outer stage tooth structures are processed by lathe, and the inner layer is cut by wire cutting after processing. The outermost sleeve is directly processed by lathe, and the surface is galvanized after processing.

[0034] When wrapping the steel wire layer of the hose, the tension of the wrapped steel wire must be strictly controlled. Generally, as the thickness of the pipe wall increases, the tension of the outer layer of the wrapped steel wire gradually decreases. The pitch of the steel wire wrapped at the pipe joint should be slightly larger by 0.2-0.5mm than the pitch of the pipe body, so as to facilitate uniform penetration of the adhesive during bonding or vulcanization.

[0035] The tube core is a polytetrafluoroethylene anti-corrosion layer; the inner rubber layer is hydrogenated nitrile rubber; the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer are curing agents based on Chemlock or epoxy resin.

[0036] like Fig. 9 As shown, the joint tube core 15 provides a supporting foundation for the outer layer of the rubber hose. The tube core material is a seamless steel tube of alloy structural steel (35CrMo). The alloy steel flanges are welded at the tube core end and the tube core limit end for installing the joint and other hydraulic components or pipelines.

[0037] The performance of the high-strength hydraulic rubber hose assembly components mentioned above was verified. A series of the hose assemblies were tested with a total length of 5m. The pressure test equipment was a hydraulic servo pulse test bench with a test time of 30 hours. The joints were tested using a salt spray test machine with a test time of 100 hours. The hose diameter deformation and hose expansion and contraction deformation are the deformation variables of the hose before and after the experiment (the maximum pressure of hoses with a diameter of less than 100mm is controlled below 50Mpa, and the maximum pressure of hoses with a diameter of 150mm-250mm is controlled below 150Mpa). They can be understood as the dimensional changes of the hose before and after pressure is applied, and the service life can be reflected based on the permanent deformation of the hose. The following are the average numerical results of the experiment.

[0038]

[0039] Through experimental testing, the high-strength hydraulic rubber hose with tensile strength has high pressure resistance, low deformation and strong corrosion resistance, and is suitable for high-pressure equipment in harsh environments.

[0040] The examples of the utility model are described in detail above in conjunction with the embodiments, but the utility model 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 utility model, and should also be regarded as the protection scope of the utility model.

Claims

1. A high-strength hydraulic rubber hose assembly component, characterized in that : The tube core of the high-pressure rubber tube is sequentially composed of an inner rubber layer, an inner steel wire winding layer, a plurality of metal tube cores and a first rubber interlayer outwardly, the end of the first rubber interlayer is covered with an inner sleeve of the joint, and the inner sleeve of the joint is provided with intermediate composite layers outwardly, the intermediate composite layers include an adhesive layer and a steel wire winding interlayer, the rubber interlayer is coated on the outside after the intermediate layer of the joint is fixed, the steel wire winding interlayer of the outermost intermediate layer is coated with a rubber outer layer, and the rubber outer layer is coated with an adhesive layer and then covered with an outer sleeve of the joint; The middle layer of the joint inner sleeve and the middle composite layer is a multi-petal combined sleeve, and inverted teeth are arranged on the inner and outer sides of the single-petal sleeve.

2. The high-strength hydraulic rubber hose assembly component according to claim 1 is characterized in that : The outer sleeve of the joint is an integral sleeve, with teeth arranged on the inner side, a smooth surface on the outer side, and an outward-turned bell mouth edge arranged on the wide-mouth end.

3. The high-strength hydraulic rubber hose assembly component according to claim 1, characterized in that : The middle composite layer has 2 to 7 layers, the tube core is a polytetrafluoroethylene anti-corrosion layer; the inner rubber layer is hydrogenated nitrile rubber; the adhesive layer is a curing agent based on Chemlock or epoxy resin.

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