Ultrahigh-pressure rubber hose joint structure

Abstract

The utility model relates to an ultrahigh-pressure rubber hose joint structure, which is characterized in that a rubber hose joint is firmly connected with a rubber hose through curing glue, a steel wire winding rubber hose and a lining steel ring, so that the purpose of drawing resistance and pulling-out resistance of the joint is achieved. In the joint structure, the outer side of an inner-layer rubber pipe of a rubber interlayer is sleeved with a spiral conical surface protective sleeve which is gradually closed up from the outer end to the inner end to lock the rubber interlayer, and a high-pressure-resistant pipe wall is arranged on the outer side of the spiral conical surface protective sleeve; the inner side of the connector body is in a step-shaped sleeve shape, an anti-retreat tooth-shaped groove is machined in the inner wall of each layer of step sleeve, the inner side wall of each anti-retreat tooth-shaped groove is sleeved with the high-pressure-resistant pipe wall, curing glue is injected into a cavity between the inner wall of the connector body and the high-pressure-resistant pipe wall after sleeving, and an anti-retreat groove is formed in the outer side of the connector body, and the distance between the anti-retreat groove and the inner side of the connector body is equal to that between the inner side of the connector body and the high-pressure-resistant pipe wall.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic connection accessories, in particular to an ultra-high pressure hose joint structure. Background Art

[0002] High-pressure hoses are the most common hydraulic equipment connection components in hydraulic systems. The hoses themselves are flexible and have a variety of joints. They can be connected to complex equipment in various harsh industrial environments to form hydraulic systems to provide power for hydraulic equipment. Therefore, high-pressure hoses used in hydraulic systems must be stable and highly applicable. The key point of high-pressure hoses is the joints. The technical difficulty is that the high-pressure hose joints are rigid metal parts, and the hose itself is made of non-metallic rubber. How to make these two materials tightly combined to avoid safety hazards caused by connection problems, and ensure that the high-pressure hose has good sealing, no leakage, and no deformation under high temperature and high pressure conditions inside the high-pressure hose, and that there is no relative position shift between the two materials and that they will not be pulled out 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 an ultra-high pressure hose joint structure, which firmly connects the hose joint to the hose by curing glue and steel wire wrapped around the hose and the inner lining steel ring, thereby achieving the purpose of resisting pulling and pulling out of the joint.

[0004] An ultra-high pressure hose joint structure, wherein:

[0005] The outer side of the inner layer rubber hose of the rubber interlayer is sheathed with a spiral cone surface protective sleeve which gradually closes from the outer end to the inner end to lock the rubber interlayer, and the outer side of the spiral cone surface protective sleeve is provided with a high pressure resistant pipe wall;

[0006] The inner side of the joint body has a stepped sleeve shape, and the inner wall of each layer of the stepped sleeve is processed with an anti-backward tooth groove. The inner wall of the anti-backward tooth groove is fitted with the high-pressure resistant pipe wall. After fitting, the cavity between the inner wall of the joint body and the high-pressure resistant pipe wall is filled with curing glue, and the outer side of the joint body is provided with an anti-backward groove with a spacing equal to that of the inner side;

[0007] The tube body of the spiral cone protective sleeve is provided with evenly arranged through holes.

[0008] Furthermore, the high-pressure resistant pipe wall is a winding layer formed by high-strength steel wire rope or carbon fiber bundle braided rope.

[0009] Furthermore, the inner layer rubber hose comprises an inner hydrogenated nitrile rubber layer and an outer high-strength reinforced fabric layer, and a rigid sealing liner ring is provided for locking the end of the rubber hose.

[0010] Furthermore, two threaded holes are evenly reserved at the top and tail of the joint body for injecting curing glue based on epoxy resin.

[0011] Beneficial technical effects obtained by the utility model:

[0012] 1) The inner layer of the hose is a hydrogenated nitrile rubber layer, and the outer layer is a high-strength fabric layer. The inner side is locked with a rigid liner sealing ring and vulcanized. One is to limit and lock the rubber tube, and the other is to seal and prevent leakage when injecting curing rubber filler.

[0013] 2) A spiral cone protective sleeve is applied to the outside of the inner rubber hose, which gradually closes from the outer end to the inner end to lock the rubber interlayer in preparation for the subsequent rubber vulcanization process. After vulcanization, this part plays three roles. One is to protect the rubber layer at the joint from being torn and torn by the internal high pressure; the second is to prevent deformation caused by high pressure in the longitudinal direction of the pipe and act as a compensator inside the pipe; the third is that the sleeve body is evenly distributed with through holes, and the inner and outer materials of the spiral sleeve are fused and tightened when the curing glue and rubber vulcanization are injected, further curing the joint.

[0014] 3) The inside of the joint body is in the form of a stepped sleeve, and the inner wall of each layer of the stepped sleeve is processed with an anti-backward tooth-shaped groove. The outer side is also processed with anti-backward grooves at equal intervals to prevent the outer rubber protective cover from falling off. The inner wall of the inner side of the tooth profile and the steel wire winding layer or the carbon fiber layer are fitted after degreasing and pickling. After fitting, the inner wall of the main joint and the outer wall of the steel wire winding layer form a cavity, and a curing glue filler based on epoxy resin is injected into the cavity to cure the inner and outer layers to form a whole. This part is the key point for high pressure resistance and anti-pullout. The structure and process provided by the utility model facilitate the realization of precise processing and assembly processes, and the injected curing glue is uniform and free of pores. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the ultra-high pressure hose joint structure in an embodiment of the utility model.

[0016] Figure 2 is a cross-sectional view of the joint body;

[0017] Figure 3 It is a structural schematic diagram of a rigid sealing liner ring;

[0018] Figure 4 It is a schematic diagram of the structure of the compensating spiral liner pipe;

[0019] Figure 5 It is a schematic diagram of a compensating spiral liner pipe for setting the winding layer thickness;

[0020] Figure 6 is a schematic cross-sectional view of the outer sleeve;

[0021] Figure 7 It is a schematic diagram of the appearance of the joint after assembly;

[0022] Figure 8It is a schematic diagram of the joint appearance with a welded flange;

[0023] Fig. 9 This is a physical picture of the joint and hose assembly with a welded flange.

[0024] Reference numerals:

[0025] The joint body 1, the sealing liner ring 2, the inner rubber tube 3, the compensating spiral liner tube 4, the outer rubber tube 5, the curing agent filler 6, and the tempered material winding braided layer 7. DETAILED DESCRIPTION

[0026] The following is a further detailed description of an ultra-high pressure hose joint structure of the utility model in conjunction with the accompanying drawings and specific embodiments: Example

[0027] An ultra-high pressure hose joint structure, wherein the inner rubber tube 3 is a hydrogenated nitrile rubber layer, the outer layer is a high-strength cloth layer, and the outer layer is a compensating spiral liner tube 4 used as a spiral cone surface protective sleeve. The spiral cone surface protective sleeve gradually closes from the outer end to the inner end to lock the rubber interlayer for subsequent rubber vulcanization process. High-strength steel wire rope or carbon fiber bundle braided rope is wound around the outer side of the spiral cone surface protective sleeve, and multiple layers are wound to form a tempered material winding braided layer 7 as the main high-pressure resistant pipe wall structure.

[0028] The inner side of the joint body 1 is in the form of a stepped sleeve, and the inner wall of each layer of the stepped sleeve is processed with an anti-backward tooth groove. The outer side of the joint body is provided with an anti-backward groove with an equal spacing to the inner side. The inner wall of the inner side of the tooth profile and the steel wire winding layer are fitted after degreasing and pickling. After fitting, the inner wall of the main joint and the outer wall of the steel wire winding layer form a cavity, and a curing agent filler 6 based on epoxy resin is injected into the cavity to cure the inner and outer layers to form a whole, such as Figure 1 shown.

[0029] like Figure 2 As shown, the inner rubber tube 3 is a hydrogenated nitrile rubber layer, the outer side is a high-strength reinforced fabric layer, and the inner side is a rigid sealing liner ring 2 ( Figure 3 ) Lock the end of the hose and vulcanize it. This part plays two roles: one is to limit and lock the rubber hose, and the other is to seal and prevent leakage when injecting curing glue filler.

[0030] The outer side of the inner rubber hose is covered with a spiral cone protective sleeve, which gradually closes from the outer end to the inner end to lock the rubber interlayer in preparation for the subsequent rubber vulcanization process. After vulcanization, this part plays three roles: one is to protect the rubber layer at the joint position from being torn and torn by the internal high pressure; the second is to prevent the part from deforming in the longitudinal direction of the pipe due to high pressure and act as a compensator inside the pipe; the third is that the through holes are evenly distributed on the sleeve body (such as Figure 4As shown), curing glue and rubber vulcanization are injected to fuse and tighten the inner and outer layers of the spiral sleeve, further curing the joint.

[0031] like Figure 5 As shown, a high-strength steel wire rope or a carbon fiber bundle braided rope is wound around the outside of the spiral cone protective sleeve. The steel wire rope or the carbon fiber bundle braided rope can be wound in multiple layers to form the most important high-pressure resistant pipe wall structure of the joint.

[0032] The inside of the joint body is a stepped sleeve, and the inner wall of each stepped sleeve is machined with anti-backward tooth grooves. The outer side is also machined with anti-backward grooves at equal intervals to prevent the outer rubber protective cover from falling off. Figure 6 Two threaded holes are evenly reserved at the top and tail of the connector body. The threaded holes are used to inject curing glue filler into the assembled connector. When the curing glue filler fills the gap, the threaded holes are sealed with flat head screws and wait for further curing.

[0033] There are many ways to connect this joint end, such as welding flange, welding oil-retaining joint, threaded pipe joint, etc. The hose is fixed on the joint with threads on one side, and the thread and the hose are tightly combined by rotating the joint to achieve the purpose of connection. This connection method is more universal and suitable for fixed hose joints. It can withstand high pressure and high temperature and is suitable for many industrial applications.

[0034] The performance of the ultra-high pressure hose joint structure is verified. The experiment tests the hose assembly with an outer diameter of 250mm and a total length of 7m. The pressure test equipment is a hydraulic servo pulse test bench with a test time of 30 hours. The joint part is a salt spray tester 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 applied is 120Mpa. The dimensional changes before and after the pressure are reflected according to the permanent deformation of the hose. Table 1 is the average numerical results of the experiment.

[0035] Table 1

[0036]

[0037] Through experimental testing, it was found that this hose joint connection method has high pressure resistance, low deformation, and strong corrosion resistance, and is suitable for high-pressure equipment in harsh environments.

[0038] 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. An ultra-high pressure hose joint structure, characterized in that: The outer side of the inner layer rubber hose of the rubber interlayer is sheathed with a spiral cone surface protective sleeve which gradually closes from the outer end to the inner end to lock the rubber interlayer, and the outer side of the spiral cone surface protective sleeve is provided with a high pressure resistant pipe wall; The inner side of the joint body has a stepped sleeve shape, and the inner wall of each layer of the stepped sleeve is processed with an anti-backward tooth groove. The inner wall of the anti-backward tooth groove is fitted with the high-pressure resistant pipe wall. After fitting, the cavity between the inner wall of the joint body and the high-pressure resistant pipe wall is filled with curing glue, and the outer side of the joint body is provided with an anti-backward groove with a spacing equal to that of the inner side; The tube body of the spiral cone protective sleeve is provided with evenly arranged through holes.

2. The ultra-high pressure hose joint structure according to claim 1, characterized in that: The high-pressure resistant pipe wall is a winding layer formed by high-strength steel wire ropes or carbon fiber bundle braided ropes.

3. The ultra-high pressure hose joint structure according to claim 1, characterized in that: The inner layer rubber hose comprises an inner hydrogenated nitrile rubber layer and an outer high-strength reinforced fabric layer, and a rigid sealing liner ring is provided for locking the end of the rubber hose.

4. The ultra-high pressure hose joint structure according to claim 1, characterized in that: Two threaded holes are evenly reserved at the top and tail of the joint body for injecting curing glue based on epoxy resin.

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