Novel assembly type composite rubber hose connector

Abstract

The utility model belongs to the technical field of hose joints, and particularly relates to a novel assembly type composite hose joint. The novel rubber pipe connector comprises a core pipe inserted into a rubber pipe opening and a sleeve locked with the core pipe, a liner pipe is arranged between the core pipe and the sleeve, the liner pipe and the front section of the core pipe are used for positioning an inner rubber layer and a reinforcing layer of the rubber pipe, the rear section of the core pipe is sleeved with a plurality of hoop rings, the hoop rings are used for positioning the reinforcing layer of the rubber pipe, and adhesive layers are arranged between the inner side of the sleeve and the core pipe and between the inner side of the sleeve and the liner pipe respectively. The adhesive layer comprises anaerobic adhesive, epoxy resin adhesive, acrylic structural adhesive and / or high-temperature-resistant inorganic adhesive; the novel rubber hose joint adopts an assembly mode of combining bonding and buckling and pressing, and has the characteristics of firm joint connection, stable sealing, economy and durability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hose joint, concretely relates to a novel assembly type composite rubber hose joint. BACKGROUND

[0002] The composite rubber hose is widely applied in the fields of oil delivery, hydraulic machinery and the like, and its structure is generally composed of an outer rubber tube, an intermediate steel wire reinforced tube and a delivery inner tube, and the pipe joint structure is formed by a core tube inserted into the inner tube and a hoop sleeve pressed and locked outside the reinforced layer and the outer tube. The hoop sleeve and the core tube are deformed to fasten the pipe joint by locking the hoop sleeve with the radial contraction force of a pressing machine.

[0003] The connection stability and sealing property of the composite hose and the joint have been a difficulty troubling the hose industry, and the traditional assembly method is circumferential pressing and locking, and the structure simply relying on mechanical pressing may have problems such as stress concentration and interface peeling, so that the technical details need to be particularly noticed during pressing, the pressing force is small and easy to loosen, the pressing force is large and the core tube of the joint is deformed, which is easy to cause problems such as sealing failure and leakage of the delivery medium. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an assembly type composite rubber hose joint adopting bonding + pressing combination, which has the characteristics of firm joint connection, stable sealing and economic durability.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A novel assembly type composite rubber hose joint, comprising a core tube inserted into the pipe joint of a rubber hose and a sleeve locked with the core tube, a liner tube is arranged between the core tube and the sleeve, the front section of the core tube is used for positioning the inner rubber layer and the reinforced layer of the rubber hose, and the rear section of the core tube is sleeved with a plurality of hoop rings for positioning the reinforced layer of the rubber hose, characterized in that: a glue layer is arranged between the inner side of the sleeve and the core tube and the liner tube respectively, and the glue layer comprises anaerobic glue, epoxy resin glue, acrylic structural glue and / or high-temperature-resistant inorganic glue.

[0007] The additional technical features of the above-mentioned novel assembly type composite rubber hose joint further comprise:

[0008] The metal contact surfaces on both sides of the glue layer are subjected to sand blasting treatment, and the roughness Ra is not less than 3 μm; or a plurality of microgrooves are arranged on the metal contact surfaces, the depth of the microgrooves is 0.1-0.3 mm, and the spacing is not more than 1 mm;

[0009] The glue layer between the hoop ring area on the core tube and the sleeve is acrylic structural glue, anaerobic glue or high-temperature-resistant inorganic glue, and carbon fiber cloth is wound between the hoop rings;

[0010] The adhesive layer between the sleeve and the liner is a two-component epoxy resin adhesive, and the inner surface of the sleeve is provided with a plurality of locking grooves;

[0011] The rear section of the sleeve has an extension section, and the extension section is connected with the liner through a spiral groove or is interlocked through an annular groove, and an epoxy resin adhesive coating, an anaerobic adhesive coating or a high-temperature-resistant inorganic adhesive coating is arranged in the spiral groove or the annular groove.

[0012] An adhesive layer is arranged between the front section of the core pipe and the inner adhesive layer of the rubber pipe and / or an adhesive layer is arranged between the rear end of the sleeve and the outer adhesive layer of the rubber pipe, and the adhesive layer comprises high-modulus epoxy resin adhesive close to the core pipe or the sleeve and flexible polyurethane adhesive close to the rubber pipe.

[0013] Compared with the prior art, the novel assembly type composite rubber pipe joint has the following advantages: the rubber pipe joint, based on the traditional sleeve locking buckle, is provided with an adhesive layer between the core pipe and the liner on the inner side of the sleeve, realizes the combination of internal adhesion and buckling, improves the stability of the joint and the rubber pipe, and improves the overall sealing effect; meanwhile, the adhesive layer comprises anaerobic adhesive, epoxy resin adhesive, acrylic structural adhesive and / or high-temperature-resistant inorganic adhesive, according to the different structural forms in the joint and the chemical properties of various adhesives, the compactness between the various components in the joint is improved, the force is balanced during buckling, the internal pipe structure form is protected, the combination of reliable connection and stable sealing is ensured, the service life of the joint is prolonged, and the joint has the advantages of compact structure, convenient installation, safety and durability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a structural schematic view of the novel assembly type composite rubber pipe joint. DETAILED DESCRIPTION

[0015] The structure and working principle of the novel assembly type composite rubber pipe joint provided by the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] In the description of the present application, unless otherwise specified, the orientation or positional relationship indicated by the terms "front / rear", "inner / outer" and the like is the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0017] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1 As shown, the structure of this novel assembled composite hose connector includes a core tube 1 inserted into the hose opening and a sleeve 2 that is locked to it. A liner 3 is provided between the core tube 1 and the sleeve 2. The liner 3 and the front section of the core tube 1 are used to position the inner rubber layer a and the reinforcing layer b of the hose. Several clamping rings 4 are fitted onto the rear section of the core tube 1 to position the reinforcing layer b of the hose. An adhesive layer 5 is provided on the inner side of the sleeve 2 (between the core tube 1 and the liner 3 respectively). The adhesive layer 5 includes anaerobic adhesive, epoxy resin adhesive, acrylic structural adhesive and / or high-temperature resistant inorganic adhesive.

[0019] Its working principle is as follows: First, the connecting port of the composite hose is peeled off in layers. The outer rubber layer c is removed, and part of the inner rubber layer a is retained. The front section of the core tube 1 is inserted into the inner rubber layer a of the composite hose. The outer liner 3 is fitted for positioning, that is, the inner surface of the liner 3 and the outer surface of the core tube 1 are pressed against each other to position the inner rubber layer a and the reinforcing layer b of the composite hose. The peeled reinforcing layer b is pressed and locked by the clamp 4 fitted on the rear section of the core tube 1. That is, after the core tube 1, the liner 3 and the clamp 4 are assembled into one unit, the outer sleeve 2 is used for locking. That is, the inner side of the sleeve 2 forms a cavity for bonding the adhesive layer 5. Anaerobic glue, epoxy resin glue, acrylic structural glue and / or high temperature resistant inorganic glue are injected to achieve a tight internal bond. When the external clamping machine is used for clamping, the force is evenly applied to ensure the internal pipe diameter structure, which not only ensures the clamping force but also enhances the sealing effect.

[0020] It should be noted that when injecting adhesive, the cavity formed inside the sleeve 2 can be entered from the rear end of the sleeve 2 (there is a gap or injection channel between the outer adhesive layer c of the composite tube and the sleeve 2), or from the front end of the sleeve 2 (near the rear section of the core tube 1, the front end of the sleeve 2 is engaged with the flange of the core tube 1 or threaded, and an injection hole d is provided therebetween).

[0021] In the structure constituting the above-mentioned novel assembled composite hose joint

[0022] —The metal contact surfaces on both sides of the adhesive layer 5 (i.e., the inner surface of the sleeve 2, the hoop 4, and the outer surface of the liner 3) are sandblasted to a roughness Ra of not less than 3μm. The purpose is to increase the surface area and improve the bonding strength. Alternatively, as an equivalent alternative, multiple microgrooves can be processed on the metal contact surfaces. The depth of the microgrooves is 0.1-0.3mm and the spacing is not more than 1mm.

[0023] Preferably, the adhesive layer 5 between the collar ring area 51 on the above-mentioned core pipe 1 and the sleeve pipe 2 is an acrylic structural adhesive, which can be quickly cured within 10-30 minutes, preferably Loctite AA 326, two-component, shear strength not less than 20 MP, resistant to high temperature above 120℃, excellent fatigue resistance, Permabond TA4610 can also be selected, resistant to oil, acid and alkali, suitable for chemical pipeline joints and vibration environment;

[0024] Or anaerobic glue is suitable for threaded sealing or flat bonding, preferably Loctite 545, resistant to high temperature and vibration, curing time 24 hours;

[0025] Or high-temperature-resistant inorganic glue, preferably silicate-based or ceramic-filled glue, resistant to high temperature above 1000℃, resistant to thermal shock, suitable for high-temperature conveying pipe joints,

[0026] Further, the above-mentioned carbon fiber cloth 41 is wound between the collar rings 4 to form a bonding reinforcement layer, which can reduce thermal stress and effectively improve the fatigue cycle number;

[0027] Preferably, the adhesive layer 5 between the sleeve pipe 2 and the liner pipe 3 in the area 52 is a two-component epoxy resin adhesive with high strength and chemical corrosion resistance, suitable for larger filling gap between the sleeve pipe 2 and the liner pipe 3, preferably 3M DP420 modified epoxy, shear strength more than 35 MPa, impact resistant, suitable for dynamic load conditions, the inner surface of the sleeve pipe 2 is provided with several locking grooves, which can increase the bonding area and the capacity of the adhesive, and when the joint is locked by pressing, the locking grooves can send radial shrinkage deformation, which can lock the composite pipe more firmly;

[0028] Further, the rear section of the sleeve pipe 2 has an extension section 53, which is connected to the liner pipe 3 through a spiral groove or interlocked through an annular groove, and the spiral groove or annular groove is provided with an epoxy resin adhesive coating, anaerobic adhesive coating, or high-temperature-resistant inorganic adhesive coating. The extension section 53 and the adhesive structure make the sleeve pipe 2 and the liner pipe 3 more integrated after locking, the structure connection is more compact, the adhesive fills the groove to form a mechanical anchoring effect, and the shear strength is improved, and the pull-out resistance can exceed 30 MPa;

[0029] Preferably, the adhesive layer 62 is provided between the front section of the core pipe 1 and the inner adhesive layer a of the rubber pipe, and / or the adhesive layer 61 is provided between the rear end of the sleeve pipe 2 and the outer adhesive layer c of the rubber pipe, in order to reduce stress concentration when the adhesive part is stressed, the adhesive layer (61, 62) includes high modulus epoxy resin adhesive (3-5 Gpa) near the core pipe 1 or the sleeve pipe 2 (metal material) side, and flexible polyurethane adhesive (0.1-0.5 Gpa) near the rubber pipe side;

[0030] That is, the adhesive layer (61, 62) adopts a modulus gradient distribution mode, and the adhesive layer (61, 62) serves as a modulus gradient layer between the low-modulus rubber and the high-modulus metal, which helps to gradually transfer and disperse stress, can effectively relieve stress concentration phenomenon at the interface, and thus improves the durability and reliability of the bonding member;

[0031] When the adhesive layer (61, 62) is designed, it should be ensured that the primer adhesive is crosslinked and co-crosslinked first, then adsorbed with the metal, and finally the adhesive and the rubber are co-crosslinked, which helps to ensure good bonding between the adhesive and the rubber and improve the stability of the bonding.

[0032] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not limiting conditions for the implementation of the present application, so any other modifications or equivalent replacements of the technical solutions of the present application, such as the modification of the configuration size, the internal structure, etc., as long as they do not deviate from the spirit and scope of the technical solutions of the present application, should be covered in the scope of the claims of the present application.

Claims

1. A novel assembled composite hose connector, comprising a core tube inserted into the hose inlet and a sleeve locking therewith, wherein a liner is provided between the core tube and the sleeve, the liner and the front section of the core tube are used to position the inner rubber layer and reinforcing layer of the hose, and the rear section of the core tube is fitted with several clamping rings for positioning the reinforcing layer of the hose, characterized in that: The adhesive layer between the sleeve and the core pipe and the liner pipe respectively comprises anaerobic glue, epoxy resin glue, acrylic structural glue and / or high-temperature-resistant inorganic glue.

2. A novel fabricated composite hose coupling joint as claimed in claim 1, wherein: The metal contact surfaces on both sides of the adhesive layer are subjected to sand blasting treatment, and the roughness Ra is not less than 3 μm; or the metal contact surfaces are provided with multiple micro-slots, the micro-slots have a depth of 0.1-0.3 mm and a spacing of not more than 1 mm.

3. A novel fabricated composite hose coupling joint as claimed in claim 1, wherein: The adhesive layer between the sleeve and the collar region of the core pipe is acrylic structural glue, anaerobic glue or high-temperature-resistant inorganic glue, and the collar regions are wound with impregnated carbon fiber cloth.

4. A novel fabricated composite hose coupling joint as claimed in claim 1, wherein: The adhesive layer between the sleeve and the liner pipe is two-component epoxy resin glue, and the inner surface of the sleeve is provided with multiple locking grooves.

5. A novel fabricated composite hose coupling joint as claimed in claim 1, wherein: The rear section of the sleeve has an extension section, the extension section is connected to the liner pipe through a spiral groove or is interlocked through an annular groove, and the spiral groove or the annular groove is provided with an epoxy resin glue coating, an anaerobic glue coating or a high-temperature-resistant inorganic glue coating.

6. A novel fabricated composite hose coupling joint as claimed in claim 1, wherein: An adhesive layer is arranged between the front section of the core pipe and the inner adhesive layer of the rubber tube and / or between the rear end of the sleeve and the outer adhesive layer of the rubber tube, and the adhesive layer comprises high-modulus epoxy resin glue close to the core pipe or the sleeve and flexible polyurethane glue close to the rubber tube.

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