Heat-resistant air hose with good interlayer adhesion

Abstract

The utility model relates to the technical field of rubber tubes, and discloses a heat-resistant air rubber tube with better interlayer adhesion, which comprises a rubber tube body, an inner rubber layer made of rubber is arranged on the innermost layer of the rubber tube body, a reinforcing layer is coated on the outer side of the inner rubber layer, an outer rubber layer is adhered on the outermost layer of the rubber tube body, and the outer rubber layer is coated on the outer rubber layer. A connecting piece with a tubular structure is connected between the rubber pipe bodies; the ventilation cavity is formed in the middle of the connecting piece, annular clamping grooves are formed in the outer walls of the two ends of the connecting piece, and the rubber pipe body is inserted into the two ends of the connecting piece through the clamping grooves. According to the heat-resistant air rubber pipe with the good interlayer adhesion, the connecting pieces are arranged, it is guaranteed that the multiple rubber pipe bodies can be stably connected through constraint of the clamping grooves and the bridles, more stability is achieved compared with hot melting connection or sleeve thermoplastic connection, and the situation that cracks appear at the connecting positions of the multiple rubber pipes due to medium temperature changes and external temperature and air pressure changes is avoided; and the normal stability of medium conveying is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber hoses, in particular to a heat-resistant air rubber hose with good interlayer adhesion. Background Art

[0002] A hose is a tubular rubber product used to transport gases, liquids, slurries, or granular materials. Compared to flexible pipes, hoses are primarily extruded from polymeric chemical raw materials through processes such as vulcanization. There are many different types of hoses, and their names are generally based on their material, structure, and intended use. Hoses used for air transport often incorporate braided steel wire or cord into their skeleton to enhance heat resistance.

[0003] After searching, we found a publication number CN213299118U for a flexible, flex-resistant steel wire braided hose, which includes a hose body. Both ends of the hose body are fixedly connected to connecting pipes by adhesive. The hose is used to solve the problem that existing hoses do not have good performance. In this practice, when connecting multiple hoses, due to the lack of a connecting structure, the multiple hose bodies need to be connected by end melting or connected through thermoplastic parts. The connection effect is unstable and cracks may easily appear at the connection due to changes in pressure and temperature of the transmission medium, affecting the transmission stability. For this reason, we propose a heat-resistant air hose with better interlayer bonding. Utility Model Content

[0004] The purpose of the utility model is to provide a heat-resistant air hose with better interlayer adhesion, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a heat-resistant air hose with good interlayer adhesion, comprising:

[0006] The hose body, wherein the innermost layer of the hose body is provided with an inner rubber layer, the outer side of the inner rubber layer is covered with a reinforcement layer, the outermost layer of the hose body is adhered with an outer rubber layer, and the hose bodies are connected with a tubular structure connector;

[0007] A ventilation cavity is provided in the middle of the connecting piece, annular clamping grooves are provided on the outer walls at both ends of the connecting piece, and the hose body is inserted into the two ends of the connecting piece through the clamping grooves, and the outer walls at both ends of the connecting piece are sleeved with hoop-shaped hard straps, and square connecting blocks are fixed at both ends of the straps, and screw holes are provided on the outer walls at both ends of the connecting block, and connecting bolts are passed through the inner sides of the screw holes.

[0008] Furthermore, the central axes of the inner rubber layer, the reinforcement layer and the outer rubber layer coincide with each other, and the hose bodies are connected via the ventilation cavity and the connector.

[0009] Furthermore, the hose body is snap-fitted to the connector via the clamping groove, the strap is symmetrically positioned about the center axis of the connector, and the strap is snap-fitted to the connector via the connecting block and the connecting bolt.

[0010] Furthermore, a shear-resistant steel wire is passed through the interior of the reinforcement layer along the air guiding direction of the hose body, and a hoop rope made of steel wire is connected between the outer walls of the shear-resistant steel wire.

[0011] Furthermore, the shear-resistant steel wires are distributed in a circular array about the central axis of the reinforcement layer, and the hoop ropes are evenly distributed at equal distances along the outer wall of the shear-resistant steel wires.

[0012] Furthermore, the inner surface and the outer surface of the reinforcement layer are coated with a rubber coating layer, and the inner rubber layer and the outer rubber layer are bonded to the reinforcement layer through the rubber coating layer.

[0013] Furthermore, the coating layer is made of NBR / PVC blended rubber material, and the coating layer is prepared by co-precipitation and coagulation of NBR latex with an acrylonitrile content of 28% and PVC latex in a ratio of 7:3.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The heat-resistant air hose with good interlayer adhesion is provided with a connector, which ensures that multiple hose bodies can be stably connected through the clamping groove and the restraint of the strap. It is more stable than the hot melt connection or the sleeve thermoplastic connection, and avoids the occurrence of cracks at the connection of multiple hoses due to changes in medium temperature and external temperature and air pressure, which affects the normal stability of medium transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model in the combined working state;

[0017] Figure 2 This is a schematic diagram of the main structure of the connector of the utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of the harness portion of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the skeleton layer of the present invention.

[0020] In the figure: 1. Hose body; 2. Inner rubber layer; 3. Reinforcement layer; 4. Outer rubber layer; 5. Connector; 6. Ventilation cavity; 7. Clamping groove; 8. Strap; 9. Connecting block; 10. Screw hole; 11. Connecting bolt; 12. Shear-resistant steel wire; 13. Hoop rope; 14. Rubber coating layer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] This utility model provides a heat-resistant air hose with better interlayer bonding through improvement. Figure 1-Figure 3 , including: a hose body 1, the innermost layer of the hose body 1 is provided with an inner rubber layer 2 of rubber material, the outer side of the inner rubber layer 2 is covered with a reinforcement layer 3, the outermost layer of the hose body 1 is adhered with an outer rubber layer 4, the central axis positions of the inner rubber layer 2, the reinforcement layer 3 and the outer rubber layer 4 coincide, the inner rubber layer 2, the reinforcement layer 3 and the outer rubber layer 4 are coaxial and stable, ensuring uniform and smooth medium transportation; a tubular connector 5 is connected between the hose bodies 1, a ventilation cavity 6 is opened in the middle of the connector 5, and the hose bodies 1 are connected through the ventilation cavity 6 and the connector 5, and the ventilation cavity 6 is used to connect the connector 5 to multiple hose bodies 1; an annular clamping groove 7 is opened on the outer wall of both ends of the connector 5, and the hose body 1 is inserted at both ends of the connector 5 through the clamping groove 7. The body 1 is snap-fitted to the connector 5 through the clamping groove 7. The outer walls of both ends of the connector 5 are sleeved with hoop-shaped hard straps 8, and the straps 8 are symmetrically arranged about the central axis of the connector 5. Square connecting blocks 9 are fixed at both ends of the strap 8. Screw holes 10 are provided on the outer walls of both ends of the connecting block 9. Connecting bolts 11 are passed through the inner side of the screw hole 10, and the strap 8 is snap-fitted to the connector 5 through the connecting block 9 and the connecting bolt 11. The set connector 5 is constrained by the clamping groove 7 and the strap 8 to ensure that multiple hose bodies 1 can be stably connected, which is more stable than hot-melt connection or sleeve thermoplastic connection, and avoids cracks at the connections of multiple hoses due to changes in medium temperature and external temperature and air pressure, affecting the normal stability of medium transportation.

[0023] See also Figure 4 , a heat-resistant air hose with good interlayer bonding, comprising: an anti-shear steel wire 12 is passed through the interior of the reinforcement layer 3 along the air guiding direction of the hose body 1, and the anti-shear steel wire 12 is distributed in a ring array about the central axis of the reinforcement layer 3, and the anti-shear steel wire 12 is used to enhance the tensile and shear resistance of the hose body 1, and prevent the hose body 1 from being stretched and broken when conveying the medium; a steel wire hoop 13 is connected between the outer walls of the shear steel wire 12, and the hoop 13 is evenly distributed at equal distances along the outer wall of the shear steel wire 12, and the shear steel wire 12 and the ring-shaped hoop 13 are used to enhance the structural strength of the hose body 1, improve the applicability and durability of the hose body 1 during operation, and enable the hose body 1 to maintain a stable shape when conveying media of different pressures.

[0024] See also Figure 1 and Figure 4 A heat-resistant air hose with good interlayer adhesion comprises: a reinforcement layer 3 having an inner and outer surfaces coated with a rubber coating layer 14, and an inner rubber layer 2 and an outer rubber layer 4 being bonded to the reinforcement layer 3 through the rubber coating layer 14, the rubber coating layer 14 being made of an NBR / PVC blended rubber material, and being prepared by co-precipitation and coagulation of NBR latex having an acrylonitrile content of 28% and PVC latex in a ratio of 7:3. The rubber coating layer 14 is an NBR / PVC blended rubber produced by an emulsion co-precipitation method, which combines the weather and aging resistance of NBR with the ozone and heat resistance of modified PVC, and enhances the self-adhesive properties of the rubber coating layer 14, so that the inner rubber layer 2 and the outer rubber layer 4 bonded to the reinforcement layer 3 through the rubber coating layer 14 remain stable and are not easily detached to affect medium transportation.

[0025] Working principle: For this type of heat-resistant air hose with good interlayer adhesion, first, the hose body 1 is composed of the innermost inner rubber layer 2, the middle reinforcement layer 3 and the outermost outer rubber layer 4. The inner and outer surfaces of the reinforcement layer 3 are coated with NBR / PVC blended rubber produced by emulsion co-precipitation method. The coating layer 14 composed of the blended rubber has good adhesion and anti-aging, ozone resistance and heat resistance, so that the bonded inner rubber layer 2 and outer rubber layer 4 are not easy to fall off from the reinforcement layer 3, and prevent the hose body 1 from being damaged due to excessive temperature or other excessive temperatures when transporting transmission media of different temperature and pressure. Subsequently, when multiple hose bodies 1 are connected, the staff will insert the two connected hose bodies 1 into the connector 5, the inner side support of the clamping groove 7 is a hard structure, which plays the role of supporting and clamping. Then the staff will put the strap 8 on the connection between the hose body 1 and the connector 5, and use the connecting bolt 11 to pass through the screw hole 10 on the connecting block 9 on the strap 8. After tightening and fixing, the connector 5 will tie and fix the two connected hose bodies 1, so that multiple hose bodies 1 can be transported through the ventilation cavity 6 of the connector 5, and prevent cracks from occurring at the connection due to pressure and temperature changes during the medium transmission process. Finally, the reinforcing layer 3 of the hose body 1 is penetrated with a shear wire 12 and a hoop 13 to strengthen the structural strength. Its good shear and tensile resistance ensures that the hose body 1 is not easy to break when dragged and pulled.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat-resistant air hose with good interlayer bonding, characterized in that: include: A hose body (1), wherein the innermost layer of the hose body (1) is provided with an inner rubber layer (2) made of rubber material, the outer side of the inner rubber layer (2) is coated with a reinforcing layer (3), the outermost layer of the hose body (1) is bonded with an outer rubber layer (4), and a connecting piece (5) of a tubular structure is connected between the hose bodies (1); A vent cavity (6) is provided in the middle of the connecting piece (5), an annular clamping groove (7) is provided on the outer walls at both ends of the connecting piece (5), and the hose body (1) is inserted at both ends of the connecting piece (5) through the clamping groove (7), and the outer walls at both ends of the connecting piece (5) are sleeved with hoop-shaped hard straps (8), and both ends of the straps (8) are fixed with square connecting blocks (9), and the outer walls at both ends of the connecting block (9) are provided with screw holes (10), and the inner sides of the screw holes (10) are penetrated with connecting bolts (11).

2. A heat-resistant air hose with good interlayer adhesion according to claim 1, characterized in that: The central axes of the inner rubber layer (2), the reinforcement layer (3) and the outer rubber layer (4) coincide with each other, and the hose bodies (1) are connected to each other via the ventilation cavity (6) and the connecting piece (5).

3. A heat-resistant air hose with good interlayer adhesion according to claim 1, characterized in that: The hose body (1) is snap-fitted to the connecting piece (5) via the clamping groove (7), the strap (8) is symmetrically arranged about the central axis of the connecting piece (5), and the strap (8) is snap-fitted to the connecting piece (5) via the connecting block (9) and the connecting bolt (11).

4. A heat-resistant air hose with good interlayer adhesion according to claim 1, characterized in that: The interior of the reinforcement layer (3) is provided with a shear-resistant steel wire (12) along the air guiding direction of the hose body (1), and a hoop rope (13) made of steel wire material is connected between the outer walls of the shear-resistant steel wire (12).

5. A heat-resistant air hose with good interlayer adhesion according to claim 4, characterized in that: The shear-resistant steel wires (12) are distributed in a ring array about the central axis of the reinforcement layer (3), and the hoop ropes (13) are evenly distributed at equal distances along the outer wall of the shear-resistant steel wires (12).

6. A heat-resistant air hose with good interlayer adhesion according to claim 1, characterized in that: The inner surface and the outer surface of the reinforcing layer (3) are both coated with a rubber coating layer (14), and the inner rubber layer (2) and the outer rubber layer (4) are bonded to the reinforcing layer (3) via the rubber coating layer (14).

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