High strength rubber hose

Abstract

The utility model discloses a high strength rubber hose relates to the field of rubber hose, and the utility model discloses a hose body, and one end is equipped with quick change connection structure. The structure is constituted by male head subassembly and female head subassembly, and male head subassembly contains male head core, steel ball locking sleeve, locking steel ball and return spring, and female head subassembly contains female head body with guiding bevel and locking groove. When connecting, return spring pushes steel ball locking sleeve and compresses locking steel ball, makes it card into male head core recess and female head body locking groove and realizes mechanical interlock simultaneously. The leakage prevention structure contains the main sealing ring and the standby sealing ring of male head core and the check valve in female head body, ensures that there is no leakage when connecting and disconnecting. The hose adopts multilayer structure, and the outer layer is equipped with embedded armor belt and spring sheath and enhances wear resistance and bending resistance. The utility model realizes quick and reliable connection and disconnection, has excellent sealing property, tensile strength and environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of rubber hoses, and in particular to a high-strength rubber hose. Background Technology

[0002] Rubber hoses are a common liquid transfer device that can be used to transfer various conventional liquids. In special applications such as high-pressure jetting, in order to prevent the hose from breaking, high-strength hoses that are thicker and stronger than ordinary hoses are usually required. Because the hoses themselves are relatively strong, it is more difficult to connect two sets of high-strength hoses, and some connecting tools are also required, making the connection process more troublesome.

[0003] In the utility model "A High-Strength Rubber Hose" with patent number CN 222503076 U, there are two hoses: hose one and hose two. A fixing component is installed at the right end of hose one, and a connecting component is installed at the right end of the fixing component. The right end of the connecting component is fixedly connected to the left end of hose two. The fixing component includes a fixing sleeve inserted into the right end of hose one. A nut is fitted onto the outer wall of the fixing sleeve, and a fixing spring plate is provided on the outer wall of the fixing sleeve. External threads are provided on the fixing spring plate and the outer wall of the fixing sleeve, and the nut is adapted to the external threads. The connecting component includes a screw block. In this utility model, by setting the fixing component as a sleeve type, when the length of hose one needs to be adjusted, the operator can directly adjust it by cutting hose one, and then simply sleeve the fixing component onto the right end of hose one to complete the installation of the fixing component, making it highly applicable.

[0004] The rubber hoses under this technology rely on the frictional force generated by the tightening of the threads for fixation, lacking a reliable mechanical interlocking structure. Under vibration and pulse pressure, the threads are prone to loosening, leading to disconnection. At the same time, there is no independent sealing ring design, and the seal is only achieved by the interference fit between the hose wall and the metal parts. This structure has high requirements for processing accuracy and hose deformation, the seal is unreliable, and leakage is prone to occur under pressure fluctuations. Therefore, we propose a high-strength rubber hose. Utility Model Content

[0005] The main objective of this invention is to provide a high-strength rubber hose that can effectively solve the problems of rubber hoses in the prior art that rely on the friction force generated by tightening the threads for fixation, lack a reliable mechanical interlocking structure, and are prone to loosening of the threads and disconnection under vibration and pulse pressure. In addition, there is no independent sealing ring design, and the sealing relies solely on the interference fit between the hose wall and the metal parts. This structure has high requirements for processing accuracy and hose deformation, unreliable sealing, and is prone to leakage under pressure fluctuations.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a high-strength rubber hose, comprising a hose structure, wherein the hose structure includes a hose body, characterized in that: at least one end of the hose body is provided with a quick-connect structure; the quick-connect structure includes a male connector assembly and a female connector assembly that are mutually inserted and mated; the male connector assembly includes a male connector core and a steel ball locking sleeve sleeved thereon, and the female connector assembly includes a female connector body; a leak-proof structure is provided between the male connector core and the female connector body; and a guide bevel is provided at the inlet end of the female connector body.

[0007] Preferably, the male connector assembly further includes a locking steel ball and a return spring; the steel ball locking sleeve is axially slidably fitted onto the outside of the male connector core, and the return spring acts on the steel ball locking sleeve to give it a forward tendency; the inner wall of the female connector body has a locking groove; when the male connector assembly is inserted into the female connector assembly, under the push of the return spring, the steel ball locking sleeve constrains the locking steel ball inside inward, so that part of the locking steel ball is engaged with the corresponding groove of the male connector core, and part of it is engaged with the locking groove, forming a mechanical interlock. This structure achieves fast and reliable connection, and can effectively resist vibration and axial tension, preventing accidental loosening.

[0008] Preferably, the male connector assembly is further equipped with a dust cap that detachably covers the end of the male connector core. This design protects the male connector core and sealing ring from contamination and damage when not in use, extending the connector's service life.

[0009] Preferably, the leak-proof structure includes an O-ring seal disposed on the male connector core and a backup seal located thereafter; when the male connector assembly and the female connector assembly are locked together, the O-ring seal is compressed between the outer wall of the male connector core and the inner wall of the female connector body to form a primary seal, and the backup seal constitutes a secondary sealing barrier. This multi-seal design greatly improves sealing reliability, ensuring no leakage even in the event of a slight failure of the primary seal.

[0010] Preferably, the leak-proof structure further includes a one-way valve structure disposed inside the female connector body; the one-way valve structure includes a one-way valve core, a valve core spring, and a valve seat sealing surface; when the male connector assembly is not inserted, the valve core spring drives the one-way valve core to press against the valve seat sealing surface, achieving automatic sealing in the disconnected state. This function ensures that the medium will not leak from the female connector end when the hose is disconnected, improving operational safety and environmental friendliness.

[0011] Preferably, the hose body comprises an inner rubber layer, a reinforcing layer, and an outer rubber layer from the inside out; the female connector and male connector are permanently fixedly connected to the reinforcing layer of the hose body by a crimping method. This connection method directly transmits the force to the reinforcing layer, avoiding damage to the hose structure caused by traditional methods and ensuring that the connection part has a strength similar to that of the hose body.

[0012] Preferably, the hose structure further includes a shell reinforcement structure; the shell reinforcement structure includes at least one spirally wound embedded armor strip embedded in the outer adhesive layer, the embedded armor strip having outwardly molded abrasion-resistant protrusions. This design significantly enhances the abrasion resistance, impact resistance, and torsional resistance of the hose shell, extending its service life under harsh working conditions.

[0013] Preferably, the outer shell reinforcement structure further includes a spring sleeve fitted at the connection between the hose body and the quick-connect structure. The two ends of the spring sleeve are respectively fixed to the outer rubber layer and the outer shell of the quick-connect structure via sleeve retaining rings. This structure effectively protects the most vulnerable joint root of the hose from excessive bending, friction, and impact, preventing premature damage at this location.

[0014] This utility model has the following beneficial effects:

[0015] 1. The core of this utility model's quick-connect structure lies in the sliding engagement of the steel ball locking sleeve and the return spring, which transforms the axial spring force into a radial constraint force on the locking steel ball. This forces the steel ball to simultaneously embed into the male core groove and the female body locking groove, forming a rigid connection with three-point engagement. This purely mechanical structure provides extremely high tensile strength and vibration resistance, eliminating the possibility of accidental loosening from a structural principle perspective. The guide bevel design ensures automatic alignment and smoothness during insertion, making the connection operation simple and reliable.

[0016] 2. The leak-proof structure of this utility model adopts a double sealing ring structure arranged front and rear, forming an independent secondary sealing barrier behind the main sealing ring. This series sealing structure provides double insurance. At the same time, a one-way valve structure pre-tightened by a valve core spring is integrated into the female head body. Utilizing the synergistic effect of spring force and fluid pressure, a tight fit between the valve core and the valve seat sealing surface can be instantly achieved when the connection is disconnected.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a high-strength rubber hose according to the present invention;

[0020] Figure 2This is a schematic diagram of the hose structure of a high-strength rubber hose according to the present invention;

[0021] Figure 3 This is a schematic diagram of a quick-connect structure for a high-strength rubber hose according to the present invention.

[0022] Figure 4 This is a schematic diagram of the leak-proof structure of a high-strength rubber hose according to this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 100. Hose structure; 101. Hose body; 102. Inner rubber layer; 103. Reinforcing layer; 104. Outer rubber layer; 200. Quick-connect structure; 201. Male core; 202. Steel ball locking sleeve; 203. Locking steel ball; 204. Return spring; 205. Dust cap; 300. Leak-proof structure; 301. O-ring seal; 302. Spare sealing ring; 303. One-way valve core; 304. Valve core spring; 305. Valve seat sealing surface; 306. Female body; 307. Locking groove; 308. Guide bevel; 400. Outer shell reinforcement structure; 401. Embedded armor strip; 402. Wear-resistant protrusion; 403. Spring sleeve; 404. Sleeve retaining ring. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] See Figure 1-4 This utility model relates to a high-strength rubber hose, comprising a hose structure 100, which includes a hose body 101. The hose body 101 has at least one end equipped with a quick-connect structure 200. The quick-connect structure 200 includes a male connector assembly and a female connector assembly that interlock. The male connector assembly includes a male core 201 and a steel ball locking sleeve 202 fitted over it. The female connector assembly includes a female body 306. A leak-proof structure 300 is provided between the male core 201 and the female body 306. The inlet end of the female body 306 has a guide bevel 308. This integrated design enables quick connection and separation of the hose and connector, while the guide bevel 308 ensures smooth alignment and insertion, laying the foundation for reliable sealing and locking.

[0029] Please see Figure 3 The male connector assembly also includes a locking steel ball 203 and a return spring 204. The steel ball locking sleeve 202 is axially slidably fitted around the male connector core 201. The return spring 204 acts on the steel ball locking sleeve 202, giving it a forward tendency. A locking groove 307 is formed on the inner wall of the female connector body 306. When the male connector assembly is inserted into the female connector assembly, under the push of the return spring 204, the steel ball locking sleeve 202 restrains the locking steel ball 203 inside, causing part of the locking steel ball 203 to engage with the corresponding groove in the male connector core 201 and part to engage with the locking groove 307, forming a mechanical interlock. This structure achieves quick and reliable connection and effectively resists vibration and axial tension, preventing accidental loosening.

[0030] Please see Figure 3 The male connector assembly is also equipped with a dust cap 205, which detachably covers the end of the male connector core 201. This design protects the male connector core 201 and the sealing ring from contamination and damage when not in use, extending the connector's service life.

[0031] Please see Figure 3 The leak-proof structure 300 includes an O-ring 301 disposed on the male connector core 201 and a backup O-ring 302 located thereafter. When the male connector assembly and the female connector assembly are locked together, the O-ring 301 is compressed between the outer wall of the male connector core 201 and the inner wall of the female connector body 306 to form a primary seal, while the backup O-ring 302 constitutes a secondary sealing barrier. This multi-seal design greatly improves sealing reliability, ensuring no leakage even in the event of a slight failure of the primary seal.

[0032] Please see Figure 4The leak-proof structure 300 also includes a one-way valve structure located inside the female connector body 306. The one-way valve structure includes a one-way valve core 303, a valve core spring 304, and a valve seat sealing surface 305. When the male connector assembly is not inserted, the valve core spring 304 drives the one-way valve core 303 to press against the valve seat sealing surface 305, achieving automatic sealing in the disconnected state. This function ensures that the medium will not leak from the female connector end when the hose is disconnected, improving operational safety and environmental friendliness.

[0033] Please see Figure 2 The hose body 101 comprises, from the inside out, an inner rubber layer 102, a reinforcing layer 103, and an outer rubber layer 104. The female connector 306 and the male connector core 201 are permanently fixedly connected to the reinforcing layer 103 of the hose body 101 by a crimping method. This connection method directly transmits the force to the reinforcing layer 103, avoiding damage to the hose structure 100 caused by traditional methods and ensuring that the connection part has a strength similar to that of the hose body 101.

[0034] Please see Figure 2 The hose structure 100 also includes a shell reinforcement structure 400; the shell reinforcement structure 400 includes at least one spirally wound embedded armor strip 401 embedded in the outer adhesive layer 104, with outwardly molded abrasion-resistant protrusions 402 on the embedded armor strip 401. This design significantly enhances the abrasion resistance, impact resistance, and torsional resistance of the hose shell, extending its service life under harsh working conditions. The embedded armor strip 401 is made of high-strength abrasion-resistant composite material. The matrix is ​​engineering-grade thermoplastic polyurethane, ensuring the strip is flexible and durable. The reinforcing skeleton is made of high-modulus synthetic fiber, significantly improving tensile strength and tear resistance. The abrasion-resistant protrusions 402 are treated with a special modification process, possessing superior abrasion resistance. The armor strip 401 has an overall uniform cross-section strip structure. Geometric abrasion-resistant protrusions 402 are regularly distributed on the surface of the strip, with the protrusions adopting a frustum shape and being reinforced. An anchoring groove is designed at the bottom of the strip, and the edges adopt a gradually thinning transition structure. During installation, the tape is spirally wound around the outer rubber layer 104 of the hose at a specific angle, with adjacent tapes maintaining precise spacing and using an alternating arrangement.

[0035] Please see Figure 2 The outer shell reinforcement structure 400 also includes a spring sleeve 403 fitted at the connection between the hose body 101 and the quick-connect structure 200. The two ends of the spring sleeve 403 are respectively fixed to the outer rubber layer 104 and the outer shell of the quick-connect structure 200 via sleeve retaining rings 404. This structure effectively protects the most vulnerable joint root of the hose from excessive bending, friction, and impact, preventing premature damage at this location.

[0036] Working principle of quick-change connection structure 200: The core of this structure is a steel ball mechanical interlock, enabling one-button operation. During connection, the male connector core 201 is inserted into the female connector body 306, opening the internal valve core. Driven by the return spring 204, the steel ball locking sleeve 202 moves forward, squeezing the locking steel ball 203 inside inward, causing it to simultaneously engage with the groove in the male connector core 201 and the locking groove 307 in the female connector body 306, forming a secure mechanical interlock, accompanied by a "click" sound feedback. During disconnection, pulling the steel ball locking sleeve 202 backward compresses the return spring 204, whose internal release area provides space for the locking steel ball 203 to move outward. A slight pull on the male connector assembly allows the steel ball to disengage from the locking groove 307, achieving separation.

[0037] Working principle of the leak-proof structure 300: This structure ensures no leakage under any conditions through multiple sealing schemes. Sealing during connection: After the male and female connectors are locked, the O-ring 301 on the male connector core 201 is compressed to form the primary seal; the subsequent backup sealing ring 302 provides a secondary seal, constituting double protection. Sealing during disconnection: After the male connector is pulled out, the valve core spring 304 inside the female connector body 306 immediately pushes the one-way valve core 303 to reset, pressing tightly against the valve seat sealing surface 305, automatically cutting off the flow path and preventing media leakage from the female connector end.

[0038] Before use, check that the hose body 101 and all connecting parts are intact. Confirm that the dust cap 205 at the male connector end has been removed and that the male connector core 201 and O-ring seal 301 are clean and undamaged. Confirm that the guide bevel 308 at the inlet of the female connector 306 is free of foreign objects.

[0039] Align the male connector assembly with the inlet of the female connector body 306, and with the guidance of the guide bevel 308, smoothly insert the male connector core 201 into the female connector body 306. During insertion, the male connector core 201 will push open the one-way valve core 303. When a clear "click" sound is heard, it indicates that the locking steel ball 203 has been engaged in the locking groove 307 under the action of the return spring 204, forming a mechanical interlock, and the connection is complete. At this time, the O-ring seal 301 and the spare seal 302 form the main seal and secondary seal, respectively.

[0040] After connection, fluid can flow smoothly through the groove inside the male connector 201. When the hose is in operation:

[0041] The reinforcing layer 103 withstands internal pressure, the embedded armor strip 401 and the wear-resistant protrusion 402 protect the outer adhesive layer 104 from external wear, the spring sleeve 403 protects the root of the joint from excessive bending, and the leak-proof structure 300 ensures that there is no leakage at the connection.

[0042] When disconnection is required, pull the steel ball locking sleeve 202 backward to disengage the locking steel ball 203 from the locking groove 307, and the male connector assembly can be easily pulled out. After disconnection, the valve core spring 304 will immediately push the one-way valve core 303 to press against the valve seat sealing surface 305, achieving automatic sealing and preventing media leakage.

[0043] After disconnecting, promptly cover with the dust cap 205 to protect the male connector core 201 and the sealing ring. Regularly inspect the wear of the armor belt 401 and the spring sleeve 403, and replace them as necessary.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-strength rubber hose, comprising a hose structure (100), said hose structure (100) comprising a hose body (101), characterized in that: At least one end of the hose body (101) is provided with a quick-connect structure (200); the quick-connect structure (200) includes a male connector assembly and a female connector assembly that are plugged into each other; the male connector assembly includes a male connector core (201) and a steel ball locking sleeve (202) sleeved thereon, and the female connector assembly includes a female connector body (306); a leak-proof structure (300) is provided between the male connector core (201) and the female connector body (306); the inlet end of the female connector body (306) is provided with a guide bevel (308).

2. A high strength rubber hose according to claim 1, characterized in that: The male connector assembly also includes a locking steel ball (203) and a return spring (204); the steel ball locking sleeve (202) is axially slidably sleeved on the outside of the male connector core (201), and the return spring (204) acts on the steel ball locking sleeve (202) to make it have a forward tendency; the inner wall of the female connector body (306) is provided with a locking groove (307); when the male connector assembly is inserted into the female connector assembly, under the push of the return spring (204), the steel ball locking sleeve (202) constrains the locking steel ball (203) inside it inward, so that the locking steel ball (203) is partially stuck into the corresponding groove of the male connector core (201) and partially stuck into the locking groove (307), forming a mechanical interlock.

3. A high strength rubber hose according to claim 2, characterised in that: The male connector assembly is also equipped with a dust cap (205) which is detachably fitted onto the end of the male connector core (201).

4. A high strength rubber hose according to claim 2, characterized in that: The leak-proof structure (300) includes an O-ring (301) disposed on the male core (201) and a spare sealing ring (302) located thereafter; when the male assembly and the female assembly are locked together, the O-ring (301) is compressed between the outer wall of the male core (201) and the inner wall of the female body (306) to form a primary seal, and the spare sealing ring (302) constitutes a secondary sealing barrier.

5. A high-strength rubber hose according to claim 4, characterized in that: The leak-proof structure (300) also includes a one-way valve structure disposed inside the female head body (306); the one-way valve structure includes a one-way valve core (303), a valve core spring (304), and a valve seat sealing surface (305); when the male head assembly is not inserted, the valve core spring (304) drives the one-way valve core (303) to press against the valve seat sealing surface (305) to achieve automatic sealing in the disconnected state.

6. A high strength rubber hose according to claim 1, characterized in that: The hose body (101) includes an inner rubber layer (102), a reinforcing layer (103) and an outer rubber layer (104) from the inside to the outside; the female head (306) and the male head core (201) are permanently fixedly connected to the reinforcing layer (103) of the hose body (101) by a crimping method.

7. A high strength rubber hose according to claim 6, characterised in that: The hose structure (100) also includes a shell reinforcement structure (400); the shell reinforcement structure (400) includes at least one spirally wound embedded armor strip (401) embedded in the outer adhesive layer (104), the embedded armor strip (401) having outward wear-resistant protrusions (402) molded on it.

8. A high strength rubber hose according to claim 7, characterized in that: The outer shell reinforcement structure (400) also includes a spring sleeve (403) sleeved at the connection between the hose body (101) and the quick-change connection structure (200). The two ends of the spring sleeve (403) are respectively fixed to the outer rubber layer (104) and the outer shell of the quick-change connection structure (200) by sleeve fixing rings (404).

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