An explosion-proof and freeze-proof all-plastic water hose

Abstract

This utility model relates to the field of water hose technology, and in particular to an explosion-proof and antifreeze all-plastic water hose, comprising a tube body consisting of an inner lining layer, a fiber reinforcement layer, an antifreeze layer, and an outer layer, which are co-extruded sequentially from the inside to the outside. The antifreeze layer is made of elastic microporous foam material. By setting a special antifreeze layer made of elastic microporous foam material, this utility model can actively absorb and buffer the huge internal stress generated by ice expansion when the residual water inside freezes due to low external temperatures. This prevents the tube body from bulging, delamination, or bursting due to stress concentration.

Description

Technical Field

[0001] This utility model relates to the field of water hose technology, specifically to an explosion-proof and freeze-proof all-plastic water hose. Background Technology

[0002] In fields such as firefighting, agricultural irrigation, industrial liquid transportation, and emergency drainage, water hoses are indispensable basic equipment, and their performance directly affects operational efficiency and the safety of personnel and equipment. Traditional water hoses are mostly made of rubber, polyurethane, or fiber-reinforced composite materials. These materials perform well under normal conditions, but their inherent defects become apparent under extreme working conditions, such as in frigid environments or locations with explosion risks.

[0003] In cold environments, if residual water is not drained promptly after use, the water inside traditional fiber-reinforced hoses will freeze. The expansion of ice will generate extremely high internal stress. Due to the high rigidity and limited ductility of the fiber braided layer and adhesive layer, they cannot effectively absorb this stress, which can easily lead to bulging, delamination, or even longitudinal bursting of the hose, causing permanent damage, huge economic losses, and safety hazards.

[0004] Therefore, an explosion-proof and freeze-proof all-plastic water hose is needed to improve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof and freeze-proof all-plastic water hose to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An explosion-proof and freeze-proof all-plastic water hose, comprising: A tube consisting of an inner lining, a fiber reinforcement layer, an antifreeze layer, and an outer layer, which are co-extruded sequentially from the inside out; The antifreeze layer is made of an elastic microporous foam material.

[0007] As a preferred embodiment of this utility model, the fiber reinforcement layer is made of high-strength synthetic fiber filaments embedded between the interface of the inner lining layer and the outer layer by means of weaving or winding.

[0008] As a preferred embodiment of this utility model, the high-strength synthetic fiber is one of polyester, aramid, or ultra-high molecular weight polyethylene fiber.

[0009] As a preferred embodiment of this utility model, the outer side of the outer layer is provided with spirally wound reinforcing ribs.

[0010] As a preferred embodiment of this utility model, the outer contour of the cross-section of the reinforcing rib is arc-shaped.

[0011] As a preferred embodiment of this utility model, the reinforcing rib is made of the same material as the outer layer and is integrally extruded.

[0012] As a preferred embodiment of this utility model, a set of grooves are symmetrically provided on the side of the outer layer to improve the bending flexibility of the water hose.

[0013] As a preferred embodiment of this utility model, the material of the inner lining layer and / or the outer layer contains an antistatic agent.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention features a special antifreeze layer made of elastic microporous foam material. When the residual water inside freezes due to low external temperatures, the structure undergoes elastic deformation through its compressible microporous structure, actively absorbing and buffering the enormous internal stress generated by the ice expansion. This prevents the pipe from bulging, delamination, or bursting due to stress concentration. The all-plastic co-extrusion integrated molding process ensures a strong bond between the functional layers, eliminating leakage and structural damage caused by interlayer peeling. This greatly improves the reliability and service life of the hose under extreme climatic conditions and effectively avoids economic losses and operational interruptions caused by hose freezing and cracking. This invention incorporates antistatic agents into the inner and outer lining materials, giving the hose a long-lasting static dissipation capability. This fundamentally eliminates the potential risk of spark explosions caused by static accumulation, enabling its safe application in explosion-proof environments such as chemical plants and mines. The spirally wound wear-resistant reinforcing ribs on the outer layer significantly enhance the hose's resistance to physical scratches and wear, while the symmetrically designed grooves optimize the hose's bending flexibility while ensuring pressure resistance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a side view of the present invention.

[0016] In the diagram: 1. Pipe body; 2. Groove; 3. Inner lining; 4. Fiber reinforcement layer; 5. Antifreeze layer; 6. Outer layer; 7. Reinforcing rib. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1-3 This utility model provides a technical solution: Example 1, please refer to Figure 1 , 2 3. An explosion-proof and antifreeze all-plastic water hose, the pipe body 1 is integrally formed from the inside to the outside through a co-extrusion process, which ensures that there is no gap between the layers and avoids the peeling and delamination problems that may occur between the layers of traditional composite water hoses. From the inside to the outside, it includes: inner lining layer 3, fiber reinforcement layer 4, antifreeze layer 5 and outer layer 6.

[0022] The inner lining 3 is the innermost layer of the pipe body 1 and is in direct contact with the fluid being transported. Therefore, it is preferably made of materials such as thermoplastic polyurethane or high-density polyethylene. These materials have the characteristics of smooth surface, low coefficient of friction, and good chemical corrosion resistance. The smooth inner wall 3 can effectively reduce fluid transport resistance and improve efficiency. At the same time, its chemical inertness ensures safety and durability when transporting a variety of liquids.

[0023] Tightly wrapped around the outside of the inner lining layer 3 is the fiber reinforcement layer 4. During the co-extrusion molding process, high-strength synthetic fiber filaments, such as polyester, aramid, or ultra-high molecular weight polyethylene fibers, are directly embedded into the outer surface of the inner lining layer 3, which has not yet been completely cooled and cured, by weaving or winding. The fiber reinforcement layer 4 bears most of the circumferential stress and axial tensile force borne by the pipe body 1 during operation, which greatly enhances the burst pressure and pressure bearing capacity of the water hose, enabling it to adapt to high-pressure fire fighting and other application scenarios.

[0024] Located outside the fiber reinforcement layer 4 is the antifreeze layer 5, which is made of an elastic microporous foam material, such as foamed thermoplastic polyurethane or foamed polyethylene. When residual water inside the hose freezes, its volume expands, generating huge internal stress. At this time, the elastic microporous foam layer 5 acts as a compressible buffer zone, effectively absorbing and dissipating the ice expansion stress through its own dynamic compression and elastic deformation. This prevents the hose body 1 from bulging or bursting due to stress concentration. At the same time, this foam structure also gives the hose better flexibility and heat insulation performance.

[0025] The outermost layer of the hose is the outer layer 6, which serves as a protective layer and is in direct contact with the external environment. The outer layer 6 is usually made of materials with excellent wear resistance, such as wear-resistant polyurethane or polyvinyl chloride. The tough outer layer 6 can effectively resist the physical damage to the hose 1 caused by dragging and friction during use, and protect the internal functional layers, especially the fragile fiber reinforcement layer 4, from being exposed and damaged, thereby extending the overall service life of the hose.

[0026] Example 2: In order to further enhance the wear resistance of the water hose, especially its durability on rough ground, a reinforcing rib 7 is added to the outer side of the outer layer 6.

[0027] The reinforcing rib 7 is preferably made of the same material as the outer layer 6 and is integrally formed by co-extrusion process, which ensures a firm bond between the two and eliminates the risk of detachment. The reinforcing rib 7 is spirally wrapped around the surface of the outer layer 6. When the water hose is dragged on the ground, the raised reinforcing rib 7 contacts the ground first, changing the surface contact to line contact, which greatly reduces the friction area and thus significantly improves the wear resistance of the water hose. Furthermore, the outer contour of the cross-section of the reinforcing rib 7 is designed to be arc-shaped. The smooth contour avoids sharp edges, which makes the water hose smoother when coiling and bending, and less prone to sharp bends or snagging. It also avoids cracking at the root of the reinforcing rib 7 due to stress concentration.

[0028] Example 3: Based on any of the above embodiments, in order to improve the operational flexibility of the water hose in specific usage scenarios, a set of grooves 2 can be symmetrically opened on the side of the outer layer 6. These grooves form structural weak points in the wall thickness of the outer layer 6. When the water hose needs to be bent, the stress will be concentrated in these grooves 2 first, making the bending action more effortless and flexible. It is especially suitable for use in working environments with limited space or frequent turning.

[0029] During the mixing process of the inner lining layer 3 and the outer layer 6, a permanent antistatic agent is uniformly incorporated. The antistatic agent can effectively reduce the surface resistance of the polymer material, so that when the water hose is transporting fluid at high speed or when static electricity is generated due to friction, the charge can be quickly dissipated along the pipe wall. This eliminates the risk of static discharge sparks igniting surrounding flammable gases or dust from the source, making this water hose safe to use in places with explosion-proof requirements such as petroleum, chemical, and mining industries.

[0030] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof and freeze-proof all-plastic water hose, characterized in that, include: A tube (1) is formed by co-extruding an inner lining (3), a fiber reinforcement layer (4), an antifreeze layer (5), and an outer layer (6) from the inside out. The antifreeze layer (5) is made of elastic microporous foam material.

2. The explosion-proof and antifreeze all-plastic water hose according to claim 1, characterized in that: The fiber reinforcement layer (4) is made of high-strength synthetic fiber filaments embedded between the interface of the inner lining layer (3) and the outer layer (6) by weaving or winding.

3. The explosion-proof and antifreeze all-plastic water hose according to claim 2, characterized in that: The high-strength synthetic fiber is one of polyester, aramid, or ultra-high molecular weight polyethylene fiber.

4. The explosion-proof and antifreeze all-plastic water hose according to claim 1, characterized in that: The outer layer (6) is provided with a spirally wound reinforcing rib (7) on its outer side.

5. The explosion-proof and antifreeze all-plastic water hose according to claim 4, characterized in that: The cross-sectional outer contour of the reinforcing rib (7) is arc-shaped.

6. The explosion-proof and antifreeze all-plastic water hose according to claim 4 or 5, characterized in that: The reinforcing rib (7) is made of the same material as the outer layer (6) and is integrally extruded.

7. The explosion-proof and antifreeze all-plastic water hose according to claim 1, characterized in that: The outer layer (6) has a set of grooves (2) symmetrically formed on its side to improve the flexibility of the hose bending.

8. The explosion-proof and antifreeze all-plastic water hose according to claim 1, characterized in that: The materials of the inner lining (3) and / or outer layer (6) contain an antistatic agent.

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