PVDF (Polyvinylidene Fluoride) corrosion-resistant ultrahigh pressure cleaning hose

Abstract

The utility model belongs to the technical field of hoses, and particularly relates to a PVDF (Polyvinylidene Fluoride) corrosion-resistant ultrahigh-pressure cleaning hose. The PVDF pipe comprises a pipe body and connectors, the connectors are arranged at the two ends of the pipe body, and the pipe body is sequentially provided with a PVDF pipe, an inner steel wire braid layer, a middle rubber layer, an outer steel wire braid layer and outer polyurethane from inside to outside. According to the utility model, the ultra-long length (200m-400m) and the safety requirement can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoses, and in particular relates to a PVDF corrosion-resistant ultra-high pressure cleaning hose. Background Art

[0002] PVDF hoses, due to their excellent corrosion resistance and high mechanical strength, are widely used in high-pressure cleaning operations to transport special media. However, existing corrosion-resistant PVDF high-pressure cleaning hoses are limited in length by their joint structure and inherent hose construction, typically exceeding 200 meters, making them difficult to meet customer demands for extra-long hoses. This length limitation has created numerous inconveniences in applications such as industrial cleaning and pipeline transportation. Summary of the Invention

[0003] The utility model aims to solve the above problems and provides a PVDF corrosion-resistant ultra-high pressure cleaning hose that can meet the requirements of ultra-long length (200m to 400m) and safety.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solution. The utility model includes a pipe body and a joint, and the joint is arranged at both ends of the pipe body. It is characterized in that: the pipe body is sequentially provided with PVDF pipe, inner steel wire braided layer, middle rubber layer, outer steel wire braided layer and outer polyurethane layer from inside to outside.

[0005] As a preferred solution of the present invention, the inner steel wire braided layer and the outer steel wire braided layer are woven from copper-plated steel wires.

[0006] As another preferred embodiment of the present invention, the joint includes a core tube and a sleeve, one end of the core tube is a threaded joint, and the other end is an insert joint; the outer surface of the insert joint is provided with an internal ratchet; a limiting platform is provided at the end where the insert joint is connected to the threaded joint, a clamping groove is provided between the limiting platform and the threaded joint, one end of the sleeve cooperates with the clamping groove through a clamping ring, and the inner surface of the sleeve is provided with an external ratchet; the ends of the PVDF pipe, inner steel wire braided layer, middle rubber layer and outer steel wire braided layer are in contact with the limiting platform; a gap is provided between the limiting platform and the inner wall of the sleeve, and the outer layer of polyurethane passes through the gap and contacts with the clamping ring of the sleeve.

[0007] Furthermore, a toothless plug is provided at the end of the insertion connector.

[0008] Furthermore, the inner ratchet includes a first ratchet arranged at the end of the insertion joint, and a second ratchet group inserted in the middle of the joint, the first ratchet and the second ratchet group are both ratchet teeth with triangular cross-sections; the length of the first ratchet is l, the length of the second ratchet group is L, l<L.

[0009] Furthermore, the cross section of the outer ratchet is trapezoidal, the tooth height of the outer ratchet is H, and the tooth height of the inner ratchet is h, where h<H.

[0010] As a third preferred solution of the present invention, the outer layer of polyurethane is made of wear-resistant polyurethane material.

[0011] The benefits of this utility model are as follows: 1. By adopting a multi-layer structure design consisting of PVDF tubing, an inner steel wire braid, a middle rubber layer, an outer steel wire braid, and an outer polyurethane layer, the hose has excellent corrosion resistance and high strength, capable of withstanding use under ultra-high pressure conditions. PVDF material provides excellent chemical stability and corrosion resistance. At the same time, PVDF's high strength provides a foundation for ultra-long hoses. The steel wire braid significantly increases the burst pressure and mechanical strength. The outer polyurethane layer enhances the hose's wear resistance, extending its service life and ensuring safety.

[0012] 2. By using copper-plated steel wire to braid the inner and outer steel wire layers, the hose's corrosion resistance and electrical conductivity are further improved, preventing the hose from failing due to corrosion in harsh environments, reducing the risk of static electricity accumulation, and improving overall safety.

[0013] 3. The connector design utilizes a core tube and sleeve combination, with the core tube featuring both a threaded and inserted connector. External ratchets and a stopper platform provide a secure secure connection. The meshing of the internal and external ratchets strengthens the connection between the hose and connector, effectively preventing the hose from falling off or leaking under high pressure, thereby enhancing connection stability and safety.

[0014] 4. The internal ratchet design includes two ratchets of different lengths. The length difference between the first ratchet and the second ratchet group makes the pipe body easier and more labor-saving to install. In addition, the multiple ratchet structures enable the hose to evenly disperse stress when subjected to high pressure, reduce local stress concentration, further improve the connection firmness between the hose and the connector, and extend the service life of the hose.

[0015] 5. The different cross-sectional designs of the outer and inner ratchets (trapezoidal and triangular), as well as the fact that the outer ratchet tooth height is greater than the inner ratchet tooth height, make the connection between the hose and the connector have better pull-out resistance and vibration resistance, especially under ultra-high pressure and dynamic load conditions, ensuring that the hose will not loosen or leak, thereby improving the overall reliability of use.

[0016] 6. The outer layer of polyurethane material is made of wear-resistant polyurethane, which further improves the hose's wear resistance, allowing it to be used for a long time under various harsh working conditions without being easily damaged, extending the service life of the hose and reducing maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a structural diagram of the present utility model.

[0018] Figure 2 yes Figure 1 A partial enlarged view of .

[0019] In the accompanying drawings, 1 is a joint, 2 is a pipe body, 21 is an outer layer of polyurethane, 22 is an outer steel wire braided layer, 23 is a middle rubber layer, 24 is an inner steel wire braided layer, 25 is a PVDF pipe, 3 is a sleeve, 31 is a clamping ring, 32 is an outer ratchet, 4 is a threaded joint, 41 is a limiting platform, 42 is an inner ratchet, 43 is a first ratchet, 44 is a second ratchet group, and 45 is a toothless plug. DETAILED DESCRIPTION

[0020] The utility model includes a pipe body 2 and a joint 1. The joint 1 is arranged at both ends of the pipe body 2. The pipe body 2 is sequentially provided with a PVDF pipe 25, an inner steel wire braided layer 24, a middle rubber layer 23, an outer steel wire braided layer 22 and an outer polyurethane layer 21 from the inside to the outside.

[0021] The PVDF pipe 25 provides a foundation and cooperates with the reinforcement layer composed of the inner steel wire braided layer 24, the middle rubber layer 23 and the outer steel wire braided layer 22 to meet the requirements of extra length and safety.

[0022] The inner steel wire braided layer 24 and the outer steel wire braided layer 22 are braided from copper-plated steel wires.

[0023] The steel wire provides strength, and the copper plating improves corrosion resistance.

[0024] The joint 1 includes a core tube and a sleeve 3, one end of the core tube is a threaded joint 4, and the other end is an insert joint 1; the outer surface of the insert joint 1 is provided with an internal ratchet 42; a limiting platform 41 is provided at the end where the insert joint 1 is connected to the threaded joint 4, a card groove is provided between the limiting platform 41 and the threaded joint 4, one end of the sleeve 3 cooperates with the card groove through a clamping ring 31, and an external ratchet 32 is provided on the inner surface of the sleeve 3; the ends of the PVDF pipe 25, the inner steel wire braided layer 24, the middle rubber layer 23 and the outer steel wire braided layer 22 are in contact with the limiting platform 41; a gap is provided between the limiting platform 41 and the inner wall of the sleeve 3, and the outer layer of polyurethane 21 passes through the gap and contacts with the clamping ring 31 of the sleeve 3.

[0025] The ratchet structure provides a reliable connection. Since PVDF is a hard material, in order to reduce the damage to the PVDF pipe 25 and the structural damage to the steel wire braided layer, the PVDF pipe 25, the inner steel wire braided layer 24 and the outer steel wire braided layer 22 are in contact with the limit platform 41 to reduce the deformation and ensure the service life, safety and stability of the pipe joint 1.

[0026] The end of the insertion connector 1 is provided with a toothless plug 45 .

[0027] The toothless plug 45 facilitates the connection between the plug and the pipe body 2 .

[0028] The inner ratchet 42 includes a first ratchet 43 arranged at the end of the inserted joint 1, and a second ratchet group 44 inserted in the middle of the joint 1. The first ratchet 43 and the second ratchet group 44 are both ratchet teeth with triangular cross-sections; the length of the first ratchet 43 is l, and the length of the second ratchet group 44 is L, l<L.

[0029] The cross section of the outer ratchet teeth 32 is trapezoidal, the tooth height of the outer ratchet teeth 32 is H, and the tooth height of the inner ratchet teeth 42 is h, where h<H.

[0030] The specific structural design of the ratchet further improves the connection stability between the connector 1 and the pipe body 2.

[0031] The outer layer of polyurethane 21 is made of wear-resistant polyurethane material, which improves the wear resistance of the hose, increases its service life, and adapts to harsh environments.

[0032] The structure of the PVDF corrosion-resistant ultra-high pressure cleaning hose of the present invention is as follows: 1. Hose structure: The hose includes an inner layer, a reinforcement layer, a middle rubber layer 23 and an outer layer from the inside to the outside.

[0033] 1.1. The inner layer is made of PVDF (polyvinylidene fluoride) material, which provides excellent corrosion resistance and is suitable for conveying various corrosive media.

[0034] 1.2. The reinforcement layer is woven from double-layer copper-plated steel wire, which significantly improves the mechanical strength and explosion resistance of the hose, and has good corrosion resistance and conductivity, preventing static electricity accumulation.

[0035] 1.3. The middle rubber layer 23 is made of synthetic rubber material, which has good flexibility and tear resistance, and provides buffering and pressure resistance support for the overall structure of the hose.

[0036] 1.4. The outer layer is made of wear-resistant polyurethane material, which greatly enhances the wear resistance of the hose, enabling it to be used for a long time in harsh environments and extending the service life of the hose.

[0037] 2. Minimum bending radius: This hose has good flexibility, with a minimum bending radius of 110mm. The bending performance meets the requirement of T / D>0.9, ensuring that it will not be easily broken or damaged under high-pressure conditions.

[0038] 3. Operating temperature: The operating temperature range of this hose is 0℃ to 65℃. Within this temperature range, the hose can maintain its excellent mechanical properties and chemical corrosion resistance, and is suitable for a variety of high-pressure cleaning application scenarios.

[0039] 3. Inner and outer diameter: The inner diameter of this hose is 16.3mm±0.5mm and the outer diameter is 23.3mm±0.4mm. It has high dimensional accuracy and is compatible with standard equipment and accessories, ensuring good sealing during high-pressure transmission.

[0040] 4. Unit weight: The unit weight of the hose is no more than 0.62 kg / m. The lightweight design makes it easy to carry and operate, and is particularly suitable for use in handheld or mobile high-pressure cleaning equipment.

[0041] 5. Working pressure: The working pressure of the hose is not more than 150 bar, which can withstand the pressure requirements of conventional high-pressure cleaning operations while ensuring safety.

[0042] 6. Burst pressure: The burst pressure of the hose is not less than 600 bar, which provides an extremely high safety margin to ensure that the hose can remain stable under sudden high-pressure shocks and avoid the risk of bursting.

[0043] This embodiment provides a PVDF corrosion-resistant ultra-high-pressure cleaning hose with excellent performance and a wide range of applications by optimizing the multi-layer structural design of the hose and strictly controlling various parameters. The hose is particularly suitable for industrial cleaning applications requiring ultra-long length (200m to 400m), high pressure, corrosion resistance, and wear resistance.

[0044] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. A PVDF corrosion-resistant ultra-high pressure cleaning hose, comprising a tube body (2) and a connector (1), wherein the connector (1) is provided at both ends of the tube body (2), and is characterized in that: The tube body (2) is provided with a PVDF tube (25), an inner steel wire braided layer (24), a middle rubber layer (23), an outer steel wire braided layer (22), and an outer polyurethane layer (21) in sequence from the inside to the outside.

2. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 1, characterized in that: The inner steel wire braided layer (24) and the outer steel wire braided layer (22) are braided from copper-plated steel wires.

3. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 1, characterized in that: The joint (1) comprises a core tube and a sleeve (3), one end of the core tube is a threaded joint (4), and the other end is an insert joint (1); an inner ratchet (42) is provided on the outer surface of the insert joint (1); a limiting platform (41) is provided on the end of the insert joint (1) connected to the threaded joint (4), a clamping groove is provided between the limiting platform (41) and the threaded joint (4), one end of the sleeve (3) cooperates with the clamping groove through a clamping ring (31), and an outer ratchet (32) is provided on the inner surface of the sleeve (3); the ends of the PVDF pipe (25), the inner steel wire braided layer (24), the middle rubber layer (23) and the outer steel wire braided layer (22) are in contact with the limiting platform (41); a gap is provided between the limiting platform (41) and the inner wall of the sleeve (3), and the outer layer of polyurethane (21) passes through the gap and contacts with the clamping ring (31) of the sleeve (3).

4. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 3, characterized in that: The end of the insertion joint (1) is provided with a toothless plug (45).

5. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 3, characterized in that: The inner ratchet (42) comprises a first ratchet (43) arranged at the end of the insertion joint (1), and a second ratchet group (44) inserted in the middle of the joint (1), wherein the first ratchet (43) and the second ratchet group (44) are both ratchet teeth with triangular cross-sections; the length of the first ratchet (43) is l, and the length of the second ratchet group (44) is L, where l<L.

6. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 5, characterized in that: The cross section of the outer ratchet (32) is trapezoidal, the tooth height of the outer ratchet (32) is H, and the tooth height of the inner ratchet (42) is h, where h<H.

7. The PVDF corrosion-resistant ultra-high pressure cleaning hose according to claim 1, characterized in that: The outer layer of polyurethane (21) is made of wear-resistant polyurethane material.

Images