CN102418818B - High-pressure flexible rubber hose assembly and manufacturing process thereof - Google Patents

Abstract

The invention discloses a high-pressure flexible rubber hose assembly and a manufacturing process thereof. The high-pressure flexible rubber hose assembly comprises a pipe body, a B-shaped inner bush, a compressive sleeve B, an A-shaped inner bush and a compressive sleeve A, wherein the pipe body comprises an inner adhesive layer, an inner adhesive tape layer, a middle adhesive layer, a steel wire cord layer or a steel wire rope layer, an outer adhesive tape layer and an outer adhesive layer; when the pipe body is vulcanized, the layers are vulcanized and crosslinked to form an integral structure; and two ends of the pipe body are locked and buckled with the B-shaped inner bush, the compressive sleeve B, the A-shaped inner bush and the compressive sleeve A. The high-pressure flexible rubber hose assembly has the advantages of light weight of the pipe body, convenience for carrying, quick installation, high work efficiency, high loading capacity, high bending flexility, weather and aging resistance, high medium-resistant performance, long service life, safety, reliability, pull-out resistance and high sealing performance, can convey a fuel oil medium under high pressure in a large-flow mode and is suitable for work environment of high pressure, unevenness and small bending radius, and the pipe body and a joint are easy to assemble and are firm and stable in combination during operation.

Description

High-pressure flexible rubber hose assembly and its manufacturing process

technical field

The invention relates to the technical field of oil pipelines, in particular to a high-pressure flexible rubber hose assembly used for high-pressure fuel transportation and flexible connection of temporary high-pressure pipelines and its manufacturing process.

Background technique

At present, most of the rubber hoses in large-diameter oil pipelines adopt a sandwich structure, and its skeleton layer is made of cord winding or canvas covering; in production design, in order to improve its pressure bearing capacity, it is necessary to increase the number of layers of the skeleton layer and the wall The increase in the number of layers will lead to unbalanced tension between layers, and the reduction of the comprehensive correction coefficient will reduce the ability to resist internal pressure and become an insurmountable obstacle. At the same time, the increase in wall thickness also increases the weight and volume of the pipe body, reduces the bending flexibility, and increases the difficulty of handling. The inter-layer imbalance and material elongation of the sandwich structure will also cause deformation of the pipe body and high elongation of the pipe body, which brings a lot of inconvenience to the use site. Due to its low pressure bearing capacity and bulky pipe body, it can only be used for low-pressure fuel transportation, and is not suitable for high-pressure transportation of oil and rapid laying of oil pipelines.

The pre-embedded structure is used between the existing pipe body and the joint. Due to the multi-layer binding, the joint volume is large, the pipe body is thick, and the construction is cumbersome, which is not conducive to rapid handling and installation.

The existing two rubber hoses are connected by flanges, and assembled and connected to form a large-length oil pipeline; the two are rigidly connected, which leads to slow connection speed, low work efficiency, difficulty in bending and changing angles, and inability to adapt to heights Uneven working environment with small bending radius. In addition, when the oil is delivered, the sealing performance is poor, and leakage is easy to occur, which increases its danger.

So far, there is no high-pressure flexible rubber hose assembly and its manufacturing process for large-caliber high-pressure delivery of fuel and flexible connection of temporary high-pressure pipelines on the market.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-pressure flexible rubber hose assembly and its manufacturing process suitable for large-diameter high-pressure delivery of fuel, flexible connection of temporary high-pressure pipelines, and working environments with unevenness and small bending radius. Light weight, easy handling, quick installation, high work efficiency, high pressure bearing capacity, excellent bending flexibility, good weather resistance and medium resistance, long service life, the combination between the pipe body and the joint is easy to assemble, and it is firm in work Stable, safe and reliable, anti-pull off, good sealing performance.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a high-pressure flexible rubber hose assembly, including a pipe body, a B-type inner bush and a compression sleeve B, and an A-type inner bush and a compression sleeve A; Wherein: the pipe body includes an inner rubber layer, an inner rubber cloth layer, a middle rubber layer, a steel cord layer or a steel wire rope layer, an outer rubber cloth layer, and an outer rubber layer from the inside to the outside; the middle rubber layer is located on the innermost steel cord layer or the inner surface of the steel cord layer, the outer surface of the outermost steel cord layer or steel cord layer, and between two adjacent layers of steel cord layers or steel cord layers; Integral structure; one end of the pipe body is locked and buckled on the B-type inner bushing through the compression sleeve B, and the other end is locked and pressed on the A-type inner bushing through the compression sleeve A.

The inner rubber layer is high-quality synthetic rubber of 2 mm to 5 mm; the inner rubber cloth layer is 2 to 4 layers of rubberized canvas; the steel cord layer or steel wire rope layer is 2 to 6 layers, which adopts Φ1 mm to Φ5mm steel cord or steel wire rope, made by cross-winding each layer; the middle rubber layer is 3-7 layers of natural rubber or high-quality synthetic rubber, and the thickness of each layer is 1mm-3mm; the outer rubber cloth The layer is 1-2 layers of rubberized canvas; the outer rubber layer is high-quality synthetic rubber of 1.5mm-4mm.

The A-type inner bushing includes an outer connection part, an anti-pull-off connection part and a sealing part, wherein: the outer connection part is located at the head, and the end of its outer peripheral surface is an inverted cone, and the end with a larger diameter There is an arc-shaped surface, and a positioning boss is arranged on its outer peripheral surface; its inner cavity is a cylindrical inner hole; the anti-pull-off connection part is located in the middle, its inner cavity is a stepped hole, and its shape is composed of external thread, It is composed of a plurality of annular bosses; the external thread is arranged close to the external connection part, and the plurality of annular bosses are arranged near the sealing part; the sealing part is located at the tail part, and a plurality of inverted holes with the same outer diameter are continuously arranged on the outer peripheral surface of the sealing part along the axial direction. Conical body, the inner cavity of which is a cylindrical inner hole.

The B-type inner bushing includes an outer connection part, an anti-pull-off connection part and a sealing part, wherein: the outer connection part is located at the head, and its end is provided with a trumpet hole, and an arc-shaped groove is provided inwardly in turn , and two annular grooves for installing elastic lock rings and U-shaped sealing rings; positioning bosses are provided on the outer peripheral surface; the anti-pull-off connection part is located in the middle, and its inner cavity is a stepped hole. It is composed of external thread and multiple annular bosses; the external thread is set close to the external connection part, and multiple annular bosses are set close to the sealing part; the sealing part is located at the tail, and the outer peripheral surface is continuously arranged in the axial direction with the same outer diameter. A plurality of inverted cones, the inner cavity of which is a cylindrical inner hole.

The inner cavity structure of the compression sleeve B includes an anti-pull-off connection part and a sealing part, which are respectively arranged corresponding to the anti-pull-off connection part and the sealing part on the B-type inner bushing; wherein: the anti-pull-off connection part is located at The inner threaded hole at the end is composed of a plurality of annular grooves, and the sealing part is composed of a plurality of annular inverted taper grooves.

The inner cavity structure of the compression sleeve A includes an anti-pull-off connection part and a sealing part, which are respectively arranged corresponding to the anti-pull-off connection part and the sealing part on the A-type inner bush; wherein: the anti-pull-off connection part is located at The inner threaded hole at the end is composed of a plurality of annular grooves, and the sealing part is composed of a plurality of annular inverted taper grooves.

In the inner cavity of the outer connection part of the B-type inner bushing on the pipe body, the outer connection part of the A-type inner bush I on the other pipe body I is inserted and connected, and an elastic lock ring is arranged between the two And U-shaped sealing ring, thus forming a quick connection structure between the pipe body and the pipe body I.

A manufacturing process of a high-pressure flexible rubber hose assembly, the process steps comprising:

The first step is to prepare materials: inner film, outer film, rubber cloth, steel cord or steel wire rope, medium film, water cloth; choose steel cord when the pressure is low, and choose steel wire rope when the pressure is high;

The second step, internal molding: on the molding machine, an inner rubber layer of 2mm to 5mm, an inner rubber layer of 2 to 4 layers, and a middle rubber layer with a thickness of 1mm to 3mm are sequentially formed on the surface of the mandrel to form a semi-finished product;

The third step is the formation of the pressure-bearing skeleton layer: on the basis of the semi-finished product formed in the second step, the steel cord or steel wire rope and the intermediate film are wound layer by layer through the winding machine, and a total of 2 to 6 layers of steel wire rope layers, 3 to 7 layers are wound. The rubber layer in the middle layer forms the pressure-bearing skeleton layer; the middle rubber layer is located on the inner surface of the innermost steel cord layer or steel wire rope layer, the outer surface of the outermost steel cord layer or steel wire rope layer, and the adjacent two layers of steel wire Between cord layers or wire rope layers, the thickness of each layer is 1mm to 3mm;

The fourth step, external molding: on the basis of the semi-finished product formed in step 3, 1-2 layers of outer rubber cloth layer and 1.5mm-4mm outer rubber layer are formed by a molding machine; water cloth is wound on the outer surface of the outer rubber layer layer;

The fifth step, rubber hose vulcanization: in the vulcanization tank, the semi-finished product formed in step four is vulcanized as a whole, so that each component of the pipe body is the inner rubber layer, inner rubber cloth layer, steel cord layer or steel wire rope layer, middle rubber layer , The outer rubber cloth layer and the outer rubber layer are vulcanized and cross-linked into an integrated structure, the temperature is 130°C-150°C, the pressure is 0.3MPa-0.4MPa, and the time is 40-80 minutes;

The sixth step is to remove the core of the water cloth: remove the water cloth wrapped on the outer rubber layer of the vulcanized rubber hose semi-finished product in step 5, and pull out the mandrel to form a rubber hose semi-finished product;

The seventh step, the fixed-length cutting of the rubber hose: according to the required length of the rubber hose, the fixed-length cutting of the rubber hose is completed on the cutting machine to form the finished product of the rubber hose body;

The eighth step, joint assembly: install the A-type inner bushing and shrinking sleeve A, and the B-type inner bushing and shrinking sleeve B on both ends of the rubber hose in step 7, and crimp it through the crimping machine, and then use the tightening The extrusion of sleeve A and shrink sleeve B buckles the joints at both ends on the pipe body, and finally forms the finished rubber hose assembly.

The adhesive cloth in the step 1 is a rubberized canvas for forming the inner adhesive layer and the outer adhesive layer, and the rubberized canvas is a chemical fiber fabric.

The inner film, the outer film and the middle film in the steps 1 to 4 are all rolled semi-finished products with a certain width and thickness; the inner film, the outer film and the middle film are respectively wound and formed into inner rubber layers, The outer rubber layer and the middle rubber layer; the inner rubber sheet and the outer rubber sheet are made of high-quality synthetic rubber; the middle rubber sheet is made of natural rubber or high-quality synthetic rubber.

The steel cord layer or steel wire rope layer in the third step is made of steel cord or steel wire rope of Φ1mm-Φ5mm respectively, and each layer is cross-wound.

The cross-winding method of each layer of the steel cord or steel wire rope means that the winding direction and winding angle of the steel cord or steel wire rope on the odd-numbered layers are the same, while the winding direction of the steel cord or steel wire rope on the even-numbered layers is the same. And the winding angle is also the same; however, the winding direction of the steel cord or steel wire rope on an adjacent odd-numbered layer and an even-numbered layer is crossed, and the angle between the two is 50° to 60°.

Compared with the prior art, the present invention has the following advantages and positive effects:

(1) The inner diameter of the high-pressure flexible rubber hose assembly of the present invention is 51 mm to 450 mm, the working pressure is 6 MPa to 30 MPa, and the burst pressure is 3 times greater than the working pressure; Working under the ground, it can be used to transport petroleum-based and water-based fluids; it has the advantages of large diameter, light weight, high pressure bearing capacity, good safety performance, and small bending radius.

(2) The present invention adopts high-quality rubber new technology formula and process to manufacture, and the inner rubber cloth layer adopts rubberized canvas, and this rubberized canvas is a chemical fiber fabric; the inner rubber layer adopts high-quality synthetic rubber, so that the inner rubber layer has light oil resistance, Good sealing and other advantages can ensure the corrosion resistance and medium resistance of the rubber hose, so that the rubber hose will not leak the conveying medium under high-pressure working conditions.

(3) Using high-strength steel cords or steel wire ropes as the pressure-bearing skeleton material instead of canvas or cord structures reduces the thickness and weight of the pipe body, improves the pressure-bearing capacity, and greatly reduces the deformation of the pipe body under pressure. In the production, each layer is cross-wound, and a chemical fiber fabric layer is added on the inside and outside of the steel cord or steel wire rope; it not only gives the hose good flexibility, but also improves the tensile strength; ensures that the high-pressure flexible rubber hose Pressure bearing capacity in high pressure environment, its comprehensive performance coefficient is high, and its bending flexibility is excellent. The middle rubber layer is made of natural rubber or high-quality synthetic rubber material, which mainly bonds the layers of steel cords or steel wire ropes together and acts as a cushion between the layers of steel cords or steel wire ropes.

(4) The outer protective layer is composed of an outer rubber cloth layer and an outer rubber layer, wherein the outer rubber cloth layer is made of rubberized canvas, which is a chemical fiber fabric; the outer rubber layer is made of high-quality synthetic rubber material, thus endowing the hose with excellent oil resistance, Abrasion-resistant and weather-resistant performance.

(5) The compression type joint is used instead of the bundled connection form, which reduces the diameter and weight of the hose end, improves the connection capacity and sealing performance, and has good pull-off resistance, firm and stable combination, and safe and reliable use. , Good sealing performance and so on.

(6) The flange connection is replaced by a novel quick connection method, which not only reduces the weight of the joint, but also greatly saves the time of the connection operation; that is, it can be completed within 0.5 to 1.0 minutes, and is suitable for oil pipelines. On-site fast connection, quick and easy assembly, high work efficiency, firm, stable and reliable combination, and good sealing performance.

(7) In a word, the present invention has the advantages of light weight, easy handling, quick installation, high working efficiency, high pressure bearing capacity, excellent bending flexibility, good weather resistance and medium resistance, long service life, and the connection between the pipe body and the metal joint. The combination between them is easy to assemble, the connection speed is fast, the work is firm and stable, safe and reliable, anti-pull off, good sealing performance, long service life, can realize large flow and high pressure fuel oil medium transportation, suitable for high pressure, uneven and curved Small radius working environment and other advantages.

Description of drawings

Figure 1 is an axial sectional view of a high-pressure flexible rubber hose assembly;

Fig. 2 is the axial sectional view of pipe body in Fig. 1;

Fig. 3 is an axial sectional view of the A-type inner bushing in Fig. 1;

Fig. 4 is an axial sectional view of the B-type inner bushing in Fig. 1;

Fig. 5 is an axial sectional view of the compression sleeve B in Fig. 1;

Fig. 6 is a quick connection structure diagram between two high-pressure flexible rubber hose assemblies in use.

In Figure 1: 1. B-type inner bushing; 2. Elastic locking ring; 3. U-shaped sealing ring; 4. Compression sleeve B; 5. Pipe body; 6. Compression sleeve A; 7. A-type lining set.

In Fig. 2: 5, pipe body; 51, inner rubber layer; 52, inner rubber cloth layer; 53, middle rubber layer; 54, steel cord layer or steel cord layer; 55, outer rubber cloth layer; 56, outer rubber layer.

In Fig. 3: 7, A-type inner bushing; 71, multiple inverted cones; 72, external thread; 73, multiple annular bosses; 74, inverted cones; 75, arc-shaped surface; 76, positioning convex tower.

In Fig. 4: 1, B-type inner bushing; 11, horn hole; 12, arc-shaped groove; 13, 14, annular groove; 15, positioning boss; 16, external thread; 17, multiple annular convex platform; 18, multiple inverted cones.

In Fig. 5: 4, compression sleeve B; 41, internally threaded hole; 42, multiple annular grooves; 43, annular inverted taper groove.

In Figure 6: 8. Compression sleeve I; 9. A-type inner bushing I; 10. Pipe body I; 2. Elastic locking ring; 3. U-shaped sealing ring; 1. B-type inner bushing; 4. Shrinkage Compression sleeve B; 5. Pipe body.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

It can be seen from Fig. 1 that the high-pressure flexible rubber hose assembly of the present invention includes a pipe body 5 and two joints; Assembled by pressing sleeve A6; where:

(1) Refer to Figure 2 for the structure of the tube body.

The structure of the pipe body 5 sequentially includes a medium-resistant layer, a stress dispersion layer, a pressure-bearing skeleton layer and an outer protective layer from the inside to the outside, and the above-mentioned layers are cross-linked into an integrated structure during vulcanization; wherein:

The innermost part of the pipe body is a medium-resistant layer, the medium-resistant layer is an inner rubber layer 51, and the stress dispersion layer is an inner rubber cloth layer 52; the outer surface of the inner rubber layer 51 is provided with an inner rubber cloth layer 52. The inner rubber cloth layer is 2 to 4 layers, using rubberized canvas, and the inner rubber cloth layer plays the role of stress dispersion and no-load bearing. The inner rubber layer 51 is 2mm to 5mm. The inner rubber layer is made of high-quality synthetic rubber material as the main formula. It will not be swollen, eroded and abrasive by the medium under the condition of high-pressure oil delivery, which meets the requirements of wear resistance and medium resistance, and prolongs the service life. .

A pressure-bearing skeleton layer is arranged on the outer surface of the stress dispersion layer. The pressure-bearing skeleton layer includes a steel cord layer or a steel cord layer 54 and an intermediate rubber layer 53; on the inner surface of the innermost steel cord layer or steel cord layer, on the outer surface of the outermost steel cord layer or steel cord layer, and Intermediate rubber layers 53 are provided between adjacent two steel cord layers or steel cord layers.

The steel cord layer or the steel cord layer 54 is 2 to 6 layers, and the steel cord layer is used for low pressure, and the steel cord layer is used for high pressure. The pressure-bearing skeleton layer uses steel cords or steel wire ropes with a diameter of Φ1mm to Φ5mm as the pressure-bearing skeleton material, and adopts the cross-winding method of each layer to form the skeleton of the pipe body, thereby endowing the pipe body with high strength and good flexibility. performance. The above-mentioned cross-winding method of each layer specifically means that the winding direction and winding angle of the steel cord or steel wire rope on the odd-numbered layers are the same, and the winding direction and winding angle of the steel cord or steel wire rope on the even-numbered layers are also the same. However, the winding directions of the steel cords or steel wire ropes on an adjacent odd-numbered layer and an even-numbered layer are intersecting, and the angle between them is 50°-60°.

The middle rubber layer 53 has 3 to 7 layers and is made of natural rubber or high-quality synthetic rubber materials. It mainly bonds the steel cords or wire ropes of each layer together and acts as a lining between the steel cord layers or steel wire rope layers. Pad effect.

An outer protective layer is arranged on the outer surface of the pressure-bearing skeleton layer. The outer protective layer includes an outer adhesive cloth layer 55 and an outer adhesive layer 56 . The outer adhesive plaster layer 55 is 1-2 layers, and adopts rubberized canvas, and the outer adhesive plaster layer has the effect of protecting the pipe body. The outer rubber layer 56 is 1.5mm to 4mm, and is made of high-quality synthetic rubber material. The outer rubber layer greatly improves the oil resistance, wear resistance, and weather aging resistance of the high-pressure flexible rubber hose assembly in the use environment, and prolongs the life of the flexible rubber hose assembly. service life.

After the winding and combination of each layer of the pipe body, through the overall vulcanization process, the overall vulcanization and cross-linking are integrated into an integrated structure to form a semi-finished pipe body. The above-mentioned inner and outer rubber cloth layers are all made of rubber-rubbing canvas, which is a chemical fiber fabric, so that each layer of the pipe body can be vulcanized and cross-linked into one body.

For working environments with different pressures, the thickness and number of layers in the pipe body should also be adjusted accordingly; when the working pressure increases, not only the diameter and number of layers of the steel cord or steel wire rope will increase, but also the inner and outer tape layers The number of layers should also be increased.

(2) The structure of B-type inner bushing and compression sleeve B: refer to Figure 1, Figure 4, and Figure 5.

As shown in Figure 4, the B-type inner bushing 1 includes an outer connection part, an anti-pull-off connection part and a sealing part, which is based on when the B-type inner bushing 1 and the compression sleeve B4 are mated with one end of the pipe body 5 , divided by the different roles played by each part along the axis. in:

The outer connection part of the B-type inner bushing 1 is located at the head, and a positioning boss 15 for installation and positioning is provided on its outer peripheral surface. A horn hole 11 is provided at the outer end of the inner cavity, and an arc-shaped groove 12 in a circular structure and two U-shaped annular grooves 13 and 14 are arranged in turn inward; the inner cavity is cylindrical Bore. Elastic locking rings 2 and U-shaped sealing rings 3 are respectively arranged in the above-mentioned annular grooves 13 and 14 .

The anti-pull-off connection part of the B-type inner bush 1 is located in the middle, and its inner cavity is a cylindrical hole, and its outer shape is composed of an external thread 16 and a plurality of annular bosses 17 arranged at intervals; wherein the external thread 16 is close to the external connection Partially disposed, a plurality of annular bosses 17 are disposed adjacent to the sealing portion.

The sealing part of the B-type inner bushing 1 is located at the tail, and a plurality of inverted cones 18 with the same outer diameter are continuously arranged axially on its outer peripheral surface; its inner cavity is a cylindrical inner hole.

As shown in Figure 5, the inner cavity structure of the compression sleeve B4 includes an anti-pull-off connection part and a sealing part, which are respectively arranged correspondingly to the anti-pull-off connection part and the sealing part on the B-type inner bushing 1. , The corresponding parts of the two are combined into a connection structure; wherein the anti-pull-off connection part is composed of an internal threaded hole 41 at one end and a plurality of annular grooves 42 . The sealing portion is composed of a plurality of annular inverted tapered grooves 43 at the other end.

(3) Structure of A-type inner bushing and compression sleeve A: refer to Figure 1, Figure 3, and Figure 5.

As shown in Figure 3, the A-type inner bushing 7 includes an outer connection part, an anti-pull-off connection part and a sealing part, which is based on the mating connection between the A-type inner bushing 7 and the compression sleeve A6 and the other end of the pipe body 5 , divided by the different roles played by each part along the axial direction. in:

The outer connection part of the A-type inner bushing 7 is located at the head, and the end of its outer peripheral surface is an inverted cone 74, and an arc-shaped surface 75 in a ring structure is provided at the end with a larger diameter; its inner cavity is Cylindrical bore.

The anti-pull-off connection part of the A-type inner bushing 7 is located in the middle, and its inner cavity is a stepped hole, and its external shape is composed of an external thread 72 and a plurality of annular bosses 73 arranged at intervals; wherein the external thread 72 is close to the external connection part Set, a plurality of annular bosses 73 are set close to the sealing part.

The sealing part of the A-type inner bushing 7 is located at the tail, and a plurality of inverted cones 71 with the same outer diameter are continuously arranged axially on its outer peripheral surface; its inner cavity is a cylindrical inner hole.

It can be seen from Fig. 1 that the inner cavity structure of the compression sleeve A6 includes the anti-pull-off connection part and the sealing part, which are respectively arranged corresponding to the anti-pull-off connection part and the sealing part on the A-type inner bushing 7, and when connected to the pipe body 5 , the corresponding parts of the two are combined into a connection structure; the anti-pull-off connection part is composed of an internal threaded hole at one end and a plurality of annular grooves. The sealing part consists of a plurality of annular inverted tapered grooves at the other end.

To sum up, the structures of the A-type inner bush 7 and the B-type inner bush 1 are the same except for the structure of the outer connection part, that is, the anti-pull-off connection part and the sealing part. In addition, the structures of the compression sleeve A6 and the compression sleeve B4 are also the same. The assembly principle and assembly structure of the A-type inner liner 7 and the compression sleeve A6, and the B-type inner liner and the compression sleeve B4 are also the same.

(4) The assembly process between the two ends of the pipe body and the two joints: refer to Figure 1.

The two joints are composed of A-type inner bushing and compression sleeve A, B-type inner bushing and compression sleeve B; The buckle is tightly pressed on the A-type inner bushing and the B-type inner bushing.

It can be seen from Figure 1 that when assembling, the compression sleeve B4 is first set on the B-type inner bushing 1, and the internal thread hole 41 on the compression sleeve B4 is threadedly matched with the external thread 16 on the B-type inner bushing connection; at the same time, a plurality of annular inverted taper grooves 43 on the compression sleeve B4 form a concave-convex fit with a plurality of inverted cones 18 on the B-type inner bushing, so that the compression sleeve B4 and the B-type inner bushing A cavity is formed; then, one end of the tube body 5 is inserted into the cavity; finally, one end of the tube body 5 is fastened and buckled on the B-type inner bushing 1 through the compression sleeve B4.

Similarly, when assembling, the compression sleeve A6 is first set on the A-type inner bushing 7, and the internal thread hole on the compression sleeve A6 is threadedly connected with the external thread on the A-type inner bushing 7; at the same time , a plurality of annular inverted taper grooves on the compression sleeve A6 form a concave-convex fit with a plurality of inverted cones on the A-type inner bushing 7, thereby forming a cavity between the compression sleeve A6 and the A-type inner bushing 7 ; Then, insert the other end of the tube body 5 into the above-mentioned cavity, and finally, lock and buckle the other end of the tube body 5 on the A-type inner bushing 7 through the compression sleeve A6.

(5) Quick connection structure between two high-pressure flexible rubber hose assemblies: refer to Figure 6.

When the pipeline is connected, the on-site quick connection between two high-pressure flexible rubber hose assemblies is actually the outer connection part of the A-type inner bushing or B-type inner bushing in a high-pressure flexible rubber hose assembly, The assembly connection with the outer connection part of the B-type inner bushing or the A-type inner bushing in another high-pressure flexible rubber hose assembly, so as to realize the purpose of quick connection of the pipeline on site and meet the requirements of large length of the pipeline.

The quick connection structure between the pipe body 5 and the pipe body I10 will be described in detail below, as shown in FIG. 6 .

The compression sleeve I8 locks and buckles one end of the pipe body I10 on the A-type inner bushing I9. The outer connection part of the A-type inner bush I9 is an inverted cone, and an annular arc-shaped surface is provided at the larger diameter end of the above-mentioned inverted cone, and the inverted cone is inserted into the B-type inner bush 1. In the inner cavity of the outer connection part, an elastic locking ring 2 and a U-shaped sealing ring 3 respectively located in annular grooves 13 and 14 are arranged between the two. After the assembly and connection are completed, the elastic lock ring 2 comes out from the above-mentioned annular groove 13 and enters into the arc-shaped surface on the A-type inner bush I9; The arc-shaped groove 12 on the A-type inner bush Ⅰ9 is matched with the arc-shaped surface on the A-type inner bush Ⅰ9 to achieve the purpose of locking the A-type inner bush Ⅰ9 and preventing it from detaching from the B-type inner bush. Realize the quick connection between the pipe body 5 and the pipe body I10.

The elastic locking ring 2 is in the form of an annular structure, and its cross section is circular. In addition, in order to have the elastic effect of expansion and contraction during installation, a notch of 8 mm to 12 mm is provided on the elastic locking ring 2 . Before locking and using, the elastic locking ring 2 is located in the annular groove 13 on the B-type inner bushing 1, and is in a neutral state at this time. When the outer connection part of the A-type inner bush I9 is an inverted cone, it is inserted into the inner cavity of the outer connection part through the horn hole 11 at the end of the B-type inner bush 1, and at the same time, it is also inserted from the inner hole of the elastic lock ring 2 through and expand its diameter. However, during locking, the elastic lock ring 2 is in a tightened state with a reduced diameter; it is in contact with the arc-shaped surface on the A-type inner bush I9 and the arc-shaped groove 12 on the B-type inner bush 1 Cooperate to achieve the purpose of locking the A-type inner bushing I9 and preventing it from coming out of the inner cavity of the B-type inner bushing 1.

The U-shaped sealing ring 3 has an annular structure, and its cross section is U-shaped, which acts as a seal.

(6) Manufacturing process of high-pressure flexible rubber hose assembly:

Its process steps include:

The first step is to prepare materials: inner film, outer film, rubber cloth, steel cord or steel wire rope, medium film, water cloth; steel cord is selected for low pressure, and steel wire rope is selected for high pressure; among them: the inner film, outer film and The middle film is a semi-finished product after calendering, and has a certain width and thickness. The inner film and the outer film are made of high-quality synthetic rubber, and the middle film is made of natural rubber or high-quality synthetic rubber; The adhesive cloth is a rubberized canvas for forming the inner adhesive layer and the outer adhesive layer, and the adhesive canvas is a chemical fiber fabric;

The second step, internal molding: on the molding machine, an inner rubber layer of 2mm to 5mm, an inner rubber layer of 2 to 4 layers, and a middle rubber layer with a thickness of 1mm to 3mm are sequentially formed on the surface of the mandrel to form a semi-finished product; The inner rubber layer and the middle rubber layer are formed by winding the inner film and the middle film respectively;

The third step is the formation of the pressure-bearing skeleton layer: on the basis of the semi-finished product formed in the second step, the steel cord or steel wire rope and the intermediate film are wound layer by layer through the winding machine, and a total of 2 to 6 layers of steel wire rope layers, 3 to 7 layers are wound. The rubber layer in the middle layer forms the pressure-bearing skeleton layer; the middle rubber layer is located on the inner surface of the innermost steel cord layer or steel wire rope layer, the outer surface of the outermost steel cord layer or steel wire rope layer, and the adjacent two layers of steel wire Between the cord layer or the steel wire rope layer, the thickness of each layer is 1mm ~ 3mm; the intermediate rubber layer is formed by winding the intermediate film; the steel cord layer or steel wire rope layer is made of Φ1mm ~ Φ5mm steel cord or steel wire rope The above-mentioned cross-winding method of each layer specifically refers to: the winding direction and winding angle of the steel cord or steel wire rope on the odd-numbered layer are the same, and the steel cord or steel wire rope on the even-numbered layer The winding direction and winding angle are also the same; however, the winding direction of the steel cord or steel wire rope on an adjacent odd-numbered layer and an even-numbered layer is crossed, and the angle between the two is 50°～60°;

The fourth step, external molding: on the basis of the semi-finished product formed in step three, 1-2 layers of outer rubber cloth layer and 1.5mm-4mm outer rubber layer are formed by the molding machine, and water cloth is wound on the outer surface of the outer rubber layer layer; the outer rubber layer is formed by winding the outer film;

The fifth step, rubber hose vulcanization: in the vulcanization tank, the semi-finished product formed in step four is vulcanized as a whole, so that each component of the pipe body is the inner rubber layer, inner rubber cloth layer, steel cord layer or steel wire rope layer, middle rubber layer , The outer rubber cloth layer and the outer rubber layer are vulcanized and cross-linked into an integrated structure, the temperature is 130°C-150°C, the pressure is 0.3MPa-0.4MPa, and the time is 40-80 minutes;

The sixth step is to remove the core of the water cloth: remove the water cloth on the semi-finished rubber hose vulcanized in step five, and take out the mandrel to form a semi-finished rubber hose;

The seventh step, the fixed-length cutting of the rubber hose: according to the required length of the rubber hose, the fixed-length cutting of the rubber hose is completed on the cutting machine to form the finished product of the rubber hose body;

The eighth step, joint assembly: install the A-type inner bushing and shrinking sleeve A, and the B-type inner bushing and shrinking sleeve B on both ends of the rubber hose body in step 7, and crimp it with a crimping machine. Compression sleeve A and compression sleeve B are squeezed to buckle and press the metal joints at both ends on the pipe body, and finally form the finished rubber hose assembly;

The ninth step is packing and storage.

Embodiment one:

The process steps used to manufacture the lower pressure hose in the high pressure flexible rubber hose assembly include:

The first step, material preparation: inner film, outer film, rubber cloth, steel cord, middle film, water cloth; among them: the inner film, outer film and middle film are semi-finished products after calendering, and have a certain width and thickness The film, the inner film and the outer film are made of high-quality synthetic rubber, the middle film is made of natural rubber or high-quality synthetic rubber; , the rubberized canvas is a chemical fiber fabric;

The second step, internal molding: on the molding machine, a 2mm inner rubber layer, 2 inner rubber cloth layers, and a 1mm middle rubber layer are sequentially formed on the surface of the mandrel to form a semi-finished product; the inner rubber layer and the middle rubber layer are respectively formed by the inner Film, medium film winding molding;

The third step is the formation of the pressure-bearing skeleton layer: on the basis of the semi-finished product formed in step 2, the steel cord and the intermediate film are wound layer by layer through the winding machine, and there are 2 layers of steel cord and 3 layers of intermediate film. , forming a pressure-bearing skeleton layer; the middle rubber layer is located on the inner surface of the innermost steel cord layer, the outer surface of the outermost steel cord layer, and between two adjacent layers of steel cord layers, each of which The thickness is 1mm; the middle rubber layer is formed by winding the middle rubber sheet; the steel cord layer is made of Φ1mm steel cord by cross-winding of each layer; the above-mentioned cross-winding of each layer specifically refers to: The winding direction and winding angle of the steel cord or steel wire rope on the upper layer are the same, and the winding direction and winding angle of the steel cord or steel wire rope on the even-numbered layer are also the same; however, an adjacent odd-numbered layer and an even-numbered layer The winding directions of the steel cords or steel wire ropes are crossed, and the angle between them is 50°～60°;

The fourth step, external molding: on the basis of the semi-finished product formed in step three, a layer of outer rubber cloth layer and a 1mm outer rubber layer are formed by a molding machine, and a water cloth layer is wound on the outer surface of the outer rubber layer; the outer rubber layer Wound by the outer film;

The fifth step, rubber hose vulcanization: in the vulcanization tank, the semi-finished product formed in step four is vulcanized as a whole, so that the components of the pipe body are cross-linked into an integrated structure, the temperature is 150 ° C, the pressure is 0.4 MPa, and the time is 60 minutes;

The sixth step is to remove the core of the water cloth: remove the water cloth on the semi-finished rubber hose vulcanized in step five, and take out the mandrel to form a semi-finished rubber hose;

The seventh step, the fixed-length cutting of the rubber hose: according to the required length of the rubber hose, the fixed-length cutting of the rubber hose is completed on the cutting machine to form the finished product of the rubber hose body;

The eighth step, joint assembly: install the A-type inner bushing and shrinking sleeve A, and the B-type inner bushing and shrinking sleeve B on both ends of the rubber hose body in step 7, and crimp it with a crimping machine. Compression sleeve A and compression sleeve B are squeezed to buckle the joints at both ends on the pipe body, and finally form the finished rubber hose assembly;

The ninth step is packing and storage.

Embodiment two:

The process steps used to manufacture the higher pressure hose in the high pressure flexible rubber hose assembly include:

The first step, material preparation: inner film, outer film, tape, steel wire rope, middle film, water cloth; among them: the inner film, outer film and middle film are semi-finished products after calendering, and have a certain width and thickness of the film , the inner film and the outer film are made of high-quality synthetic rubber, the middle film is made of natural rubber or high-quality synthetic rubber; Rubberized canvas is chemical fiber fabric;

The second step, internal molding: on the molding machine, a 5mm inner rubber layer, 4 layers of inner cloth layer, and 1 middle rubber layer with a thickness of 3mm are sequentially formed on the surface of the mandrel to form a semi-finished product; the inner rubber layer, the middle rubber layer The layers are respectively formed by winding the inner film and the middle film;

The third step is the formation of the pressure-bearing skeleton layer: on the basis of the semi-finished product formed in step 2, the steel wire rope and the intermediate film are wound layer by layer by a winding machine, and a total of 6 layers of steel wire layers and 7 layers of intermediate rubber are wound to form a pressure-bearing Skeleton layer; the middle rubber layer is located between the inner surface of the innermost steel wire rope layer, the outer surface of the outermost steel wire rope layer, and the two adjacent steel wire rope layers, and the thickness of each layer is 3mm; the middle rubber layer consists of The film is wound and formed; the steel wire rope layer is made of Φ5mm steel wire ropes by cross-winding each layer; the above-mentioned cross-winding method of each layer specifically refers to: the winding direction and winding angle of the steel cords or steel wire ropes on the odd-numbered layers are The same, and the winding direction and winding angle of the steel cord or steel wire rope on the even-numbered layer are also the same; however, the winding direction of the steel cord or steel wire rope on an adjacent odd-numbered layer and an even-numbered layer is crossed, The angle between them is 50°～60°;

The fourth step, external molding: on the basis of the semi-finished product formed in step three, a 2-layer outer rubber cloth layer and a 4mm outer rubber layer are formed by a molding machine, and a water cloth layer is wound on the outer surface of the outer rubber layer; the outer rubber layer Wound by the outer film;

The fifth step, rubber hose vulcanization: in the vulcanization tank, the semi-finished product formed in step four is vulcanized as a whole, so that the components of the pipe body are vulcanized and cross-linked into an integrated structure, the temperature is 150 ° C, the pressure is 0.4 MPa, and the time is 80 minutes ;

The sixth step is to remove the core of the water cloth: remove the water cloth on the semi-finished rubber hose vulcanized in step five, and take out the mandrel to form a semi-finished rubber hose;

The seventh step, the fixed-length cutting of the rubber hose: according to the required length of the rubber hose, the fixed-length cutting of the rubber hose is completed on the cutting machine to form the finished product of the rubber hose body;

The eighth step, joint assembly: Install the A-type inner bushing and shrinking sleeve A and the B-type inner bushing and shrinking sleeve B on both ends of the rubber hose body in step 7, and crimp it with a crimping machine. Extrusion of tight sleeve A and compression sleeve B buckles the joints at both ends on the pipe body, and finally forms the finished rubber hose assembly;

The ninth step is to pack and store.

Claims (7)

1. high-pressure flexible rubber hose assembly is characterized in that:

A, comprise body (5) and Type B neck bush (1) and contractive pressure cover B (4), A type neck bush (7) and contractive pressure cover A (6); Wherein:

B, described body (5) comprise inner glue layer (51), interior carcass (52), mesoglea (53), steel-cord ply or wire rope layer (54), outer carcass (55), outer glue-line (56) from inside to outside successively; This mesoglea (53) is between the outer surface of the steel-cord ply of the internal surface of interior steel-cord ply or wire rope layer, outermost or wire rope layer and adjacent two-layer steel-cord ply or wire rope layer;

Described inner glue layer (51) is the high-quality synthetic rubber of 2mm～5mm; Described interior carcass (52) is 2 layers～4 layers rubber canvas; Described steel-cord ply or wire rope layer (54) are 2 layers～6 layers, and it adopts Steel cord or the wire rope of Φ 1mm～Φ 5mm, and adopt each layer cross winding mode to make; Described mesoglea (53) is 3 layers～7 layers natural rubber or high-quality synthetic rubber, and every layer thickness is 1mm～3mm; Described outer carcass (55) is 1 layer～2 layers rubber canvas; Described outer glue-line (56) is the high-quality synthetic rubber of 1.5mm～4mm;

When body vulcanized, above-mentioned each layer vulcanization crosslinking was into a single integrated structure; Sulfurize temperature is 130 ℃～150 ℃;

One end of c, described body (5) overlaps B (4) tight locking button by contractive pressure and is pressed on the Type B neck bush (1), and its other end overlaps A (6) tight locking button by contractive pressure and is pressed on the A type neck bush (7);

Described A type neck bush (7) comprises that outer connection part, resistance to plucking take off attachment portion and hermetic unit, wherein: this outer connection part is positioned at head, the end of its outer peripheral surface is back taper body (74), be provided with arc-shaped surface (75) in the larger end of diameter, its outer peripheral surface is provided with positioning boss (76); Its inner chamber is the cylindricality endoporus; This resistance to plucking takes off the attachment portion and is positioned at the middle part, and its inner chamber is step hole, and its external form is comprised of outside thread (72), a plurality of annular boss (73); Wherein outside thread (72) is near the outer connection part setting, and a plurality of annular boss (73) are near the hermetic unit setting; Sealing partly is positioned at afterbody, on its outer peripheral surface vertically continuous arrangement the identical a plurality of back taper bodies (71) of external diameter are arranged, its inner chamber is the cylindricality endoporus;

Described Type B neck bush (1) comprises that outer connection part, resistance to plucking take off attachment portion and hermetic unit, wherein: this outer connection part is positioned at head, its end is provided with bellmouth orifice (11), two annular grooves (13,14) that inwardly also are provided with successively a circular groove (12) and are respectively arranged with elastic lock ring (2), U-shaped seal ring (3); Its outer peripheral surface is provided with positioning boss (15); This resistance to plucking takes off the attachment portion and is positioned at the middle part, and its inner chamber is step hole, and its external form is comprised of outside thread (16), a plurality of annular boss (17); Wherein outside thread (16) is near the outer connection part setting, and a plurality of annular boss (17) are near the hermetic unit setting; Sealing partly is positioned at afterbody, on its outer peripheral surface vertically continuous arrangement the identical a plurality of back taper bodies (18) of external diameter are arranged, its inner chamber is the cylindricality endoporus;

The inner-cavity structure of described contractive pressure cover B (4) comprises that resistance to plucking takes off attachment portion, hermetic unit, respectively with Type B neck bush (1) on resistance to plucking take off attachment portion, the corresponding setting of hermetic unit; Wherein: this resistance to plucking takes off the attachment portion and is comprised of the interior threaded hole that is positioned at the end (41), a plurality of annular groove (42), and the sealing part is comprised of a plurality of annular back taper grooves (43);

The inner-cavity structure of described contractive pressure cover A (6) comprises that resistance to plucking takes off attachment portion, hermetic unit, respectively with A type neck bush (7) on resistance to plucking take off attachment portion, the corresponding setting of hermetic unit; Wherein: this resistance to plucking takes off the attachment portion and is comprised of the interior threaded hole that is positioned at the end, a plurality of annular groove, and the sealing part is comprised of a plurality of annular back taper grooves;

The internal diameter of d, high-pressure flexible rubber hose assembly is 51mm～450mm, and working pressure is 6MPa～30MPa, and bursting pressure is greater than 3 times of working pressures, and operating temperature is-40 ℃～100 ℃.

2. high-pressure flexible rubber hose assembly according to claim 1, it is characterized in that: in the inner chamber of the outer connection part of the Type B neck bush (1) on the described body (5), insertion is connected with the outer connection part of the A type neck bush I (9) on another body I (10), be provided with U-shaped seal ring (3) and elastic lock ring (2) between the two, thereby between body (5) and body I (10), form a fast joint structure.

3. the manufacturing process of high-pressure flexible rubber hose assembly claimed in claim 1, it is characterized in that: its process step comprises:

The first step is got the raw materials ready: interior film, outer film, adhesive plaster, Steel cord or wire rope, middle film, water cloth; When low-pressure, select Steel cord, when high pressure, select wire rope;

Second step, inner moulding: on forming machine, be the mesoglea of 1mm～3mm at the inner glue layer of mandrel surface successively moulding 2mm～5mm, 2 layers～4 layers interior carcass, 1 layer thickness, form semi-finished product;

The 3rd step, the moulding of pressure-bearing framework layer: on the semi-finished product basis that in step 2, forms, by Stetch Wrapping Machine successively winding steel wire cord or wire rope and middle film, be wound with altogether 2～6 layers of steel-cord ply or wire rope layer, 3～7 layers of mesoglea, form the pressure-bearing framework layer; This mesoglea is between the outer surface of the steel-cord ply of the internal surface of interior steel-cord ply or wire rope layer, outermost or wire rope layer and adjacent two-layer steel-cord ply or wire rope layer, and its thickness of every layer is 1mm～3mm;

The 4th step, outside moulding: on the semi-finished product basis that step 3 forms, by the outer carcass of 1 layer～2 layers of forming machine moulding, the outer glue-line of 1.5mm～4mm; Be wound with the water layer of cloth on the outer surface of glue-line outside;

The 5th step, sebific duct sulfuration: the semi-finished product to forming in the step 4 in sulfurizing pot, carry out the integral body sulfuration, each constituent element that makes body is that inner glue layer, interior carcass, steel-cord ply or wire rope layer, mesoglea, outer carcass, outer glue-line vulcanization crosslinking are into a single integrated structure, temperature is 130 ℃～150 ℃, pressure is 0.3MPa～0.4MPa, 40～80 minutes time;

In the 6th step, separate the depoling of water cloth: the sebific duct semi-finished product bag after the sulfuration in the step 5 is tied up the outside water cloth releasing of glue-line outside, and with rod slipping off, form the sebific duct semi-finished product;

The 7th step, sebific duct fixed length cutting: according to required sebific duct length, finish fixed length cutting to sebific duct at cutting machine, form the finished product of rubber tube body;

The 8th step, the joint assembling: the two ends of rubber tube body are loaded onto respectively A type neck bush and are tightened cover A and Type B neck bush and tighten cover B in step 7, withhold through buckle machine, by overlapping A with tightening, tightening the extruding of overlapping B, the joint buckle at two ends is pressed on the body, forms at last the hose assembly finished product.

4. the manufacturing process of high-pressure flexible rubber hose assembly according to claim 3 is characterized in that: the adhesive plaster in the described step 1 is for being used for the rubber canvas of carcass, outer carcass in the moulding, and this rubber canvas is chemical ﹠ blended fabric.

5. the manufacturing process of high-pressure flexible rubber hose assembly according to claim 3, it is characterized in that: described step 1 to interior film, outer film and middle film in the step 4 is the semi-finished product that form through calendering and has one fixed width and the film of thickness; Being somebody's turn to do interior film, outer film and middle film Wrapping formed respectively is inner glue layer, outer glue-line and mesoglea; Described interior film, outer film are made by the high-quality synthetic rubber; Described middle film is made by natural rubber or high-quality synthetic rubber.

6. the manufacturing process of high-pressure flexible rubber hose assembly according to claim 3, it is characterized in that: the steel-cord ply in the described step 3 or wire rope layer are respectively Steel cord or the wire rope by Φ 1mm～Φ 5mm, and adopt each layer cross winding mode to make.

7. the manufacturing process of high-pressure flexible rubber hose assembly according to claim 6, it is characterized in that: each layer cross winding mode of described Steel cord or wire rope, referring to be positioned at Steel cord on the odd-level or the winding direction of wire rope is identical with winding angle, and is positioned at Steel cord on the even level or the winding direction of wire rope also is identical with winding angle; But the Steel cord on an adjacent odd-level and the even level or the winding direction of wire rope are what to be intersected, and the angle between the two is 50 °～60 °.

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