Low-temperature-resistant and high-toughness PVC (polyvinyl chloride) hose

Abstract

The invention relates to the technical field of PVC hose structures, in particular to a low-temperature-resistant and high-toughness PVC hose which comprises a pipe fitting, the pipe fitting comprises a butadiene styrene rubber pipe, net-shaped steel wires are arranged on the outer side of the butadiene styrene rubber pipe, an inner rubber pipe is arranged on the outer side of the net-shaped steel wires, a corrugated outer pipe is arranged on the outer side of the inner rubber pipe, and an inner rubber barrel is arranged on the inner side of the butadiene styrene rubber pipe. The inner rubber barrel comprises a PVC inner container pipe, an anti-reversing accessory is movably installed on one end face of the inner wall of the PVC inner container pipe, and an annular cutting component is installed at the position, close to the anti-reversing accessory, of the inner wall of the PVC inner container pipe. By arranging the anti-reverse accessory, insect prevention, odor prevention and water return prevention of the pipe fitting are achieved, compared with a traditional structure, in a normal state, the inner wall of the silica gel core sleeve is attached to be closed, the movable baffle is attached to the inner wall of the PVC liner pipe to be closed, reverse reverse flapping of peculiar smell, insects and water in the PVC liner pipe can be effectively prevented, and the probability of threatening the health of a user is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of PVC hose structures, in particular to a low-temperature-resistant and high-toughness PVC hose. Background Art

[0002] PVC (polyvinyl chloride) hose is a plastic pipe made of polyvinyl chloride. Due to its advantages such as lightness, durability, non-flammability and low price, it has become a widely used daily necessity.

[0003] As people's living standards improve, the requirements for home environment are getting higher and higher. PVC (polyvinyl chloride) hoses are widely used in household drainage systems because of their low price, chemical corrosion resistance, and good mechanical properties. However, traditional PVC hoses are prone to odor during use, and water rebound may occur during drainage, which brings inconvenience and trouble to users. The odor is mainly caused by the fermentation and corruption of sewage and dirt remaining in the drainage pipe under high temperature and humid environment, while the water rebound phenomenon is caused by the imbalance of air pressure in the drainage pipe, which causes water backflow, thereby causing water rebound. The pressure resistance of PVC hoses is limited, and the wall of PVC hoses is thin, especially the bending parts are prone to stretching in water pressure, falling pressure and collision with foreign objects. At low temperatures, the bending parts are brittle and thin, and are extremely prone to damage, resulting in water leakage. These problems not only affect the user experience, but also may threaten the user's health. Therefore, low-temperature resistant and high-toughness PVC hoses are needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A low-temperature-resistant, high-toughness PVC hose, including a pipe fitting, the pipe fitting includes a styrene-butadiene rubber tube, a mesh steel wire is arranged on the outside of the styrene-butadiene rubber tube, an inner rubber tube is arranged on the outside of the mesh steel wire, a corrugated outer tube is arranged on the outside of the inner rubber tube, an inner rubber tube is arranged on the inside of the styrene-butadiene rubber tube, the inner rubber tube includes a PVC inner tube, and an anti-reverse fitting is movably installed on one end surface of the inner wall of the PVC inner tube; A circular cutting component is installed at a position near the anti-reverse accessory on the inner wall of the PVC inner tube. The circular cutting component includes two brackets symmetrically fixed on the inner wall of the PVC inner tube. The top ends of the two brackets are connected to guide plates, and cutting blades are arranged around the outer side of the guide plates. A movable accessory is movably installed at a position near the guide plate on the inner wall of the PVC inner tube. The guide plate can be supported by the bracket to facilitate the suspension of the cutting blade inside the PVC inner tube. The cutting blade can cooperate with the cutting blade to move in an offset manner to cut the silk thread foreign matter.

[0006] Preferably, a straight steel wire is installed between the corrugated protrusions of the corrugated outer tube, and a PVC sleeve end is wrapped on the outside of the straight steel wire. The straight steel wire can enhance the toughness of the corrugated outer tube, making it convenient to quickly reset the corrugated outer tube after twisting.

[0007] Preferably, grooves are provided at both ends of the inner wall of the styrene-butadiene rubber tube, the cross-section of the groove of the styrene-butadiene rubber tube is in a stem-shaped structure, and a sealing ring is embedded in the groove, and the outer side of the sealing ring is attached to the inner wall of the inner rubber tube. Due to the elastic properties of the styrene-butadiene rubber material, it can form elastomeric micro-regions in the PVC matrix, and these micro-regions can absorb and disperse external forces, thereby improving the toughness and impact resistance of the material. The design of the sealing ring can ensure the sealing effect when the pipelines are connected. The sealing ring is installed in a snap-on manner, and the sealing ring can be replaced quickly and conveniently. At the same time, an annular protrusion structure is arranged in the sealing ring, which can facilitate the snap-on connection of the annular protrusion with the groove of the styrene-butadiene rubber tube.

[0008] Preferably, a spiral steel wire is installed inside the PVC inner tube through a spiral hole, and the wire ends of the mesh steel wire are cross-wrapped in a V-shape. The V-shaped mesh-distributed wire ends can provide higher strength and stability. This distribution method makes the pipe have strong tensile and compressive resistance in all directions and is not easy to deform. The spirally distributed steel wire can provide good flexibility and compressive resistance, and can withstand higher internal pressure.

[0009] Preferably, the anti-rebound accessory includes a side panel fixed to the inner wall of the rigid straight tube end of the PVC inner tube, and a movable baffle is movably installed on the surface of the side panel, a return spring is obliquely arranged between the inner wall of the side panel and the movable baffle, and a rectangular block is arranged at the top of the side panel to constrain the movable baffle from lifting up, so as to prevent the movable baffle from lifting up during water reversal.

[0010] Preferably, a rubber ring is installed on the side of the movable baffle through a slot, and the rubber ring fits on the inner wall of the PVC inner tube. A dividing guide plate is connected at the center of the movable baffle, and the rubber ring on the side of the movable baffle can fit on the inner wall of the PVC inner tube to ensure the sealing effect when the movable baffle is built-in. The slot of the movable baffle can facilitate the embedded installation of the rubber ring.

[0011] Preferably, a drainage outlet is provided on the side of the movable baffle away from the side plate, a through groove is provided on the surface of the movable baffle, and a silicone core sleeve is connected to the bottom end of the through groove. When water flows into the silicone core sleeve through the through groove of the movable baffle, the water flow can expand the inside of the silicone core sleeve, thereby facilitating the flow of water.

[0012] Preferably, the movable accessory includes a ring frame, a guide arc plate is arranged around the inner wall of the ring frame, and a cutting blade is connected to the center of the guide arc plate. The cutting blade and the cutting blade are staggered, and the pressure impact area is increased by the guide arc plate. When water flows through, the pushing pressure on the ring frame can be increased.

[0013] Preferably, a slider is symmetrically connected to the outside of the ring frame, and the slider is movably installed on the inner wall of the PVC inner tube through a guide groove. A supporting spring is arranged between the bottom end surface of the slider and the inner wall of the guide groove of the PVC inner tube. The slider can be guided by the guide groove of the PVC inner tube to ensure the stability of the ring frame moving in the PVC inner tube.

[0014] The present invention has at least the following beneficial effects: 1. By setting anti-reverse accessories, the pipe fittings can be made insect-proof, odor-proof and water-proof. Compared with the traditional structure, under normal circumstances, the inner wall of the silicone core sleeve is fitted and closed, and the movable baffle is fitted and closed with the inner wall of the PVC inner tube, which can effectively prevent the reverse rebound of odor, insects and water inside the PVC inner tube, and reduce the chance of threat to user health.

[0015] 2. By setting up pipe fittings, the toughness and crack resistance of the pipe fittings are ensured. The device has a multi-layer structure in the pipe fittings. The multi-layer structure can significantly improve the mechanical strength, low temperature resistance and pressure resistance of the PVC hose. Each layer can share the pressure, thereby preventing the hose from breaking or deforming under high pressure conditions. At the same time, a spiral steel wire is arranged in the PVC inner tube to increase the flexibility of the inner layer. A straight steel wire is arranged around the corrugated outer tube, and a mesh steel wire is arranged in the corrugated outer tube. The outer layer can provide support, so that the pipe fittings can quickly return to their original state after bending and stretching, avoiding the situation where the bending parts of traditional pipes are brittle and thin at low temperatures, which is extremely easy to be damaged, and effectively reducing the chance of water leakage.

[0016] 3. By setting up a circular cutting component, the separation and cutting of linear foreign bodies can be achieved. The device suspends and fixes the cutting blade through the support and the guide plate, and increases the impact force of the ring frame when it is compressed through the guide arc plate, so that the cutting blade cooperates with the cutting knife to perform dislocation cutting on the linear filaments during movement, thereby reducing the probability of linear filaments blocking the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1Schematic diagram of the external structure of the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 2 Schematic diagram of the internal sectional structure of the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 3 Schematic diagram of the partial disassembled structure of the mesh wire and the inner rubber tube in the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 4 Schematic diagram of the connection structure between the inner rubber cylinder and the pipe fitting in the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 5 Schematic diagram of the three-dimensional disassembled structure of the anti-reverse fitting in the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 6 Schematic diagram of the three-dimensional side view disassembled structure of the anti-reverse fitting in the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 7 Schematic diagram of the three-dimensional disassembled structure of the circumferential cutting component in the low-temperature resistant and high-toughness PVC hose proposed by the present invention; Figure 8 Schematic diagram of the side view structure of the circumferential cutting component in the low-temperature resistant and high-toughness PVC hose proposed by the present invention.

[0019] In the figure: 1. Pipe fitting; 11. Styrene-butadiene rubber tube; 12. Inner rubber tube; 13. Mesh wire; 14. Corrugated outer tube; 15. Sealing ring; 16. Straight wire; 2. Inner rubber cylinder; 21. PVC inner bile duct; 22. Helical wire; 3. Circumferential cutting component; 31. Bracket; 32. Guide plate; 33. Cutting blade; 34. Movable fitting; 341. Ring frame; 342. Slide block; 343. Support spring; 344. Cutting edge blade; 345. Guide arc plate; 4. Anti-reverse fitting; 41. Movable baffle; 42. Silicone core sleeve; 43. Split guide plate; 44. Side plate; 45. Rubber ring; 46. Return spring. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Refer to Figure 1-8 , for the low-temperature resistant and high-toughness PVC hose, it includes a pipe fitting 1. The pipe fitting 1 includes a styrene-butadiene rubber tube 11. A mesh wire 13 is arranged outside the styrene-butadiene rubber tube 11. An inner rubber tube 12 is arranged outside the mesh wire 13. A corrugated outer tube 14 is arranged outside the inner rubber tube 12. An inner rubber cylinder 2 is arranged inside the styrene-butadiene rubber tube 11. The inner rubber cylinder 2 includes a PVC inner bile duct 21. An anti-reverse fitting 4 is movably installed on one end face of the inner wall of the PVC inner bile duct 21; A circumcision component 3 is installed at a position on the inner wall of the PVC inner bile duct 21 close to the anti-backflow fitting 4. The circumcision component 3 includes two brackets 31 symmetrically fixed on the inner wall of the PVC inner bile duct 21. A guiding disk 32 is connected to the tops of the two brackets 31, and cutting blades 33 are arranged around the outer side of the guiding disk 32. An active fitting 34 is movably installed at a position on the inner wall of the PVC inner bile duct 21 close to the guiding disk 32.

[0022] Straight steel wires 16 are installed between the corrugated protrusions of the corrugated outer tube 14, and a PVC sleeve end is wrapped around the outer side of the straight steel wires 16.

[0023] Card slots are opened at both ends of the inner wall of the styrene-butadiene rubber tube 11. The cross-section of the card slot of the styrene-butadiene rubber tube 11 is in a dry-shaped structure, and a sealing ring 15 is embedded in the card slot. The outer side of the sealing ring 15 is attached to the inner wall of the inner rubber tube 12.

[0024] A spiral steel wire 22 is installed inside the PVC inner bile duct 21 through a spiral hole, and the wire ends of the mesh steel wire 13 are cross-wound in a V shape.

[0025] The anti-backflow fitting 4 includes a side plate 44 fixed on the inner wall of the hard straight pipe end of the PVC inner bile duct 21. An active baffle 41 is movably installed on the surface of the side plate 44, and a return spring 46 is inclined between the inner wall of the side plate 44 and the active baffle 41.

[0026] A rubber ring 45 is installed on the side of the active baffle 41 through a card slot, and the rubber ring 45 is attached to the inner wall of the PVC inner bile duct 21. A dividing guide plate 43 is connected to the center position of the active baffle 41.

[0027] A drain port is opened on the side of the active baffle 41 away from the side plate 44. A through groove is opened on the surface of the active baffle 41, and a silica gel core sleeve 42 is butted against the bottom side of the through groove.

[0028] The active fitting 34 includes a ring frame 341. Guiding arc plates 345 are arranged around the inner wall of the ring frame 341, and a cutting blade 344 is connected to the center position of the guiding arc plates 345. The cutting blade 344 is designed with a dislocation from the cutting blades 33.

[0029] Sliders 342 are symmetrically connected to the outer side of the ring frame 341, and the sliders 342 are movably installed on the inner wall of the PVC inner bile duct 21 through guide grooves. A support spring 343 is arranged between the bottom end surface of the slider 342 and the inner wall of the guide groove of the PVC inner bile duct 21.

[0030] The guiding disc 32 can be supported by the bracket 31, which facilitates suspending the cutting blade 33 inside the PVC inner bile duct 21. The cutting blade 33 can cooperate with the cutting edge blade 344 for offset movement to divide the silk foreign body. The guiding disc 32 protrudes in a conical shape towards the side of the movable fitting 34, which is convenient for the dispersed flow of water. The toughness of the corrugated outer tube 14 can be enhanced by the straight wire 16, which facilitates the rapid reset after the corrugated outer tube 14 is twisted and bent. The PVC sleeve end design outside the straight wire 16 can integrate the straight wire 16 with the corrugated outer tube 14, improving the integrity and aesthetics.

[0031] The material of the styrene-butadiene rubber tube 11 is a synthetic rubber, mainly copolymerized from butadiene and styrene. It has good wear resistance, elasticity and aging resistance. Polyvinyl chloride (PVC) is a thermoplastic with good chemical corrosion resistance and mechanical properties. Blending styrene-butadiene rubber with PVC can form a special "sea-island" structure. During the blending process, one PVC material serves as the continuous phase, while the other styrene-butadiene rubber material serves as the dispersed phase, dispersed in the continuous phase. This dispersed morphology is similar to small islands dispersed in the ocean, so it is called the "sea-island" structure. This structure helps to improve the overall performance of the material. The molecular structures and performance characteristics of styrene-butadiene rubber and PVC are different, resulting in poor compatibility when they are blended. This incompatibility makes the blended material form a heterogeneous system microscopically. Due to the elastic characteristics of the styrene-butadiene rubber material, it can form elastomeric microdomains in the PVC matrix. These microdomains can absorb and disperse external forces, thereby improving the toughness and impact resistance of the material. At the same time, the chemical corrosion resistance and mechanical properties of PVC can also be retained. The sealing rings 15 installed on the inner side surfaces at both ends of the styrene-butadiene rubber tube 11 can ensure the tightness effect during pipeline docking.

[0032] The wire ends distributed in a V-shaped network can provide higher strength and stability. This distribution method enables the pipe fitting 1 to have strong tensile and compressive capabilities in all directions and is not easily deformed. Adopting a network distribution on the outer layer can make the pipe fitting 1 achieve the best flexibility and strength. The helically distributed wires can provide good flexibility and compressive capacity. This distribution method makes the hose not easily deformed or broken when bent and can withstand a relatively high internal pressure at the same time. A rectangular block for restricting the upward lifting of the movable baffle 41 is provided at the top of the side plate 44. The movable baffle 41 can be supported by the elastic force of the return spring 46 to ensure the balance effect of the movable baffle 41 under normal conditions.

[0033] When the movable baffle 41 is built into the PVC inner bile duct 21, the side rubber ring 45 of the movable baffle 41 can fit on the inner wall of the PVC inner bile duct 21 to ensure the sealing effect when the movable baffle 41 is built in. After the water flow enters the silica gel core sleeve 42 through the through groove of the movable baffle 41, the water flow can expand the inside of the silica gel core sleeve 42, thus facilitating the water flow. After the drainage is completed, the inner wall of the silica gel core sleeve 42 shrinks and fits, thus closing the through groove of the movable baffle 41 again to avoid the situation of water flow backwash and insects crawling out.

[0034] By guiding the arc plate 345 to increase the pressure-bearing impact area, when the water flow passes through, the pushing pressure on the ring frame 341 can be increased. When the ring frame 341 is pressurized, it can drive the cutting blade 344 to move and cooperate with the cutting blade 33 to realize the cutting of linear and filamentous foreign objects, preventing the winding and blocking of filamentous foreign objects. The slider 342 can be guided through the guide groove of the PVC inner bile duct 21 to ensure the stability of the movement of the ring frame 341 in the PVC inner bile duct 21. The elastic force of the support spring 343 is used to assist in supporting the slider 342 to ensure the distance between the cutting blade 344 and the cutting blade 33.

[0035] The support spring 343 in this application can be made of materials such as rubber springs, plastic springs or coated protection springs. Among them, the elastic effects of the support spring 343 and the return spring 46 are both relatively low, and such corrosion-resistant materials can be applied to the product.

[0036] Working principle: According to the attached Figure 7 And the attached Figure 8 As shown, during the use process, when the water flow is large, during the water flow discharge process, the water flow impacts on the surface of the guiding arc plate 345. The guiding arc plate 345 is impacted to provide a greater displacement force. During the pressurization process of the guiding arc plate 345, it can drive the ring frame 341 to move. The ring frame 341 can drive the slider 342 to move in the guide groove on the inner wall of the PVC inner bile duct 21. The installation position here is the hard pipe section in the PVC inner bile duct 21. The ring frame 341 can drive the cutting blade 344 to move and be misaligned with the cutting blade 33. During the movement of the cutting blade 344, the filamentous objects that are misaligned and wound around the surfaces of the cutting blade 344 and the cutting blade 33 are cut off to avoid multiple cumulative winding and blockage of the pipeline interior; Secondly, according to the attached Figure 5 And the attached Figure 6As shown, when the water flow rate is small, the water flow is diverted and guided by the dividing guide plate 43, so that the water flow enters the silica gel core sleeve 42. After the water flow expands the silica gel core sleeve 42, it enters the PVC inner bile duct 21. When the water flow is almost cut off, the inner wall of the silica gel core sleeve 42 fits and closes again. When the water flow rate is large, the water flow directly impacts the movable baffle 41. After being stressed, the movable baffle 41 rotates with the shaft end of the side plate 44 as the fulcrum, causing the movable baffle 41 to turn over and open. At this time, the rotation of the movable baffle 41 can compress the return spring 46. The water flow is guided along the slots on the side of the movable baffle 41, facilitating entry from the opening between the PVC inner bile duct 21 and the movable baffle 41. When the water flow decreases with the drainage volume, under the action of the resilience of the return spring 46, the movable baffle 41 gradually rotates to close the opening of the PVC inner bile duct 21. The remaining small-flow water flows through the silica gel core sleeve 42. When the water flow impact is so small that it can be ignored, the silica gel core sleeve 42 closes again to prevent peculiar smell and water backflow, and avoid bugs crawling through.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature resistant and high-toughness PVC hose, characterized in that, It includes a pipe fitting (1), the pipe fitting (1) includes a styrene-butadiene rubber tube (11), a mesh steel wire (13) is arranged outside the styrene-butadiene rubber tube (11), an inner rubber tube (12) is arranged outside the mesh steel wire (13), a corrugated outer tube (14) is arranged outside the inner rubber tube (12), an inner rubber cylinder (2) is arranged inside the styrene-butadiene rubber tube (11), the inner rubber cylinder (2) includes a PVC inner bile duct (21), and an anti-reverse fitting (4) is movably installed on one end face of the inner wall of the PVC inner bile duct (21); A circumcision component (3) is installed at a position on the inner wall of the PVC inner bile duct (21) close to the anti-reverse fitting (4). The circumcision component (3) includes two brackets (31) symmetrically fixed on the inner wall of the PVC inner bile duct (21). A guiding disc (32) is connected to the tops of the two brackets (31), and cutting blades (33) are arranged around the outside of the guiding disc (32). An active fitting (34) is movably installed at a position on the inner wall of the PVC inner bile duct (21) close to the guiding disc (32).

2. The low-temperature resistant and high-toughness PVC hose according to claim 1, characterized in that, A straight steel wire (16) is installed between the corrugated protrusions of the corrugated outer tube (14), and a PVC sleeve end is wrapped outside the straight steel wire (16).

3. The low-temperature resistant and high-toughness PVC hose according to claim 2, wherein Card slots are opened at both ends of the inner wall of the styrene-butadiene rubber tube (11). The cross-section of the card slot of the styrene-butadiene rubber tube (11) is in a dry-shaped structure, and a sealing ring (15) is embedded in the card slot. The outside of the sealing ring (15) is attached to the inner wall of the inner rubber tube (12).

4. The low-temperature resistant and high-toughness PVC hose according to claim 1, characterized in that, A spiral steel wire (22) is installed inside the PVC inner bile duct (21) through a spiral hole, and the wire ends of the mesh steel wire (13) are cross-wound in a V shape.

5. The low-temperature resistant and high-toughness PVC hose according to claim 1, characterized in that, The anti-reverse fitting (4) includes a side plate (44) fixed on the inner wall of the hard straight tube end of the PVC inner bile duct (21), and an active baffle (41) is movably installed on the surface of the side plate (44). A return spring (46) is inclined between the inner wall of the side plate (44) and the active baffle (41).

6. The low-temperature resistant and high-toughness PVC hose according to claim 5, characterized in that, A rubber ring (45) is installed on the side of the active baffle (41) through a card slot, and the rubber ring (45) is attached to the inner wall of the PVC inner bile duct (21). A dividing guide plate (43) is connected to the center position of the active baffle (41).

7. The low-temperature resistant and high-toughness PVC hose according to claim 6, characterized in that, A drain port is opened on the side of the active baffle (41) away from the side plate (44). A through groove is opened on the surface of the active baffle (41), and a silica gel core sleeve (42) is butted against the bottom side of the through groove.

8. The low-temperature resistant and high-toughness PVC hose according to claim 1, characterized in that The active fitting (34) includes a ring frame (341). Guiding arc plates (345) are arranged around the inner wall of the ring frame (341), and a cutting blade (344) is connected to the center position of the guiding arc plates (345). The cutting blade (344) is designed in a staggered manner with the cutting blades (33).

9. The low-temperature resistant and high-toughness PVC hose according to claim 8, wherein Sliders (342) are symmetrically connected to the outside of the ring frame (341), and the sliders (342) are movably installed on the inner wall of the PVC inner bile duct (21) through guide grooves. A support spring (343) is arranged between the bottom end surface of the slider (342) and the inner wall of the guide groove of the PVC inner bile duct (21).

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