Low-pressure hose assembly

Abstract

The utility model discloses a low-pressure hose assembly, which belongs to the technical field of pipeline transportation, solves the problem that a joint is easy to fall off after the hose is used for a long time, and adopts the technical scheme that the low-pressure hose assembly mainly comprises a hose, a joint component and a fixed sleeve, positioning spines are arranged on the inner wall of the fixing sleeve, and the fixing sleeve penetrates into the outer wall of the hose through the positioning spines to be fixedly connected with the hose and buckles the connector assembly to prevent the connector assembly from being disengaged from the hose. The connecting assembly is mainly used for preventing the connecting assembly from being separated from the hose.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline transportation, in particular to a low-pressure hose assembly. Background Art

[0002] In the automotive field, fuel is mainly transported between the fuel injection device and the fuel pump through a metal oil pipe. The use of metal oil pipes to transport fuel is mainly to adapt to its harsh and high-pressure working environment. Traditional metal oil pipes have defects such as easy vibration and easy damage. At the same time, due to the problems of hard texture and difficulty in bending, it is inconvenient to install. In order to solve this technical problem, a hose is used to replace the metal oil pipe, and then the hose is connected to the pipe joint through a connector. The oil pipe assembly of this structure adopts a nut and a flared joint to clamp the hose and prevent the joint from falling out. For example, the patent with announcement number CN213332970U The invention discloses an automobile hose clamp, comprising a clamp band, a locking bolt and an elastic bridge. The clamp band is in a ring-shaped structure and its two ends are fastened and connected by locking bolts. The elastic bridge is in an arc shape and its two ends are movably mounted on the clamp band respectively. The elastic bridge and the clamp band are both provided with at least one positioning member, and the positioning member comprises a base plate and a positioning plate. The base plate is extended along the axial direction at any position of the side of the elastic bridge and the clamp band, and the two sides of the base plate are respectively provided with positioning plates extending vertically along the radial direction of the elastic bridge and the clamp band. An arrow-shaped structure is formed at the end of the positioning plate, and a hook portion with an angle α is formed between the side where the arrow-shaped structure is connected to the positioning plate and the two side edges of the positioning plate. The utility model provides a positioning component with a simple structure and optimizes the elastic bridge structure, so that the clamp can not only clamp the automobile hose, but also has the function of positioning and preventing the rubber shell of the automobile hose from slipping. However, during long-term use, the rubber shell of the hose will gradually lose its elasticity and deform, so that a gap will appear in the assembly between the clamp and the hose. Due to the appearance of the gap, the joint will come out of the hose, and the hose and the joint will be separated, resulting in oil leakage, liquid leakage, etc. Utility Model Content

[0003] The utility model aims to provide a low-pressure hose assembly to solve the problem that the hose joint is easy to fall off after long-term use.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a low-pressure hose assembly, including a hose, a joint assembly and a fixed sleeve, part of the structure of the joint assembly extends into the hose and abuts against the inner wall of the hose, the inner wall of the fixed sleeve is provided with a positioning spike, the fixed sleeve pierces the outer wall of the hose through the positioning spike and is fixedly connected to the hose and buckles the joint assembly to prevent the joint assembly from falling out of the hose.

[0005] After adopting the above technical scheme, the utility model has the following advantages: a part of the structure of the joint assembly is extended into the hose and clamped with the inner wall of the hose, so that the joint assembly is fixed inside the hose and forms a connected state with the hose, so that the hose can be connected with other parts through the joint assembly, so that the liquid can be transported through the hose; because the fixed sleeve is fixedly connected to the hose by piercing the outer wall of the hose through the positioning spike, and the joint assembly is buckled to prevent the joint assembly from falling out of the hose, the connection method of the fixed spike piercing the outer wall of the hose, the positioning spike and the outer wall of the hose cooperate to prevent the joint assembly from falling out of the hose, so that the connection between the fixed sleeve and the hose is more reliable, and the installation is simple, which reduces the difficulty of assembly and saves the time required for assembly.

[0006] Furthermore, the connector assembly includes a card joint and a connecting head, the connecting head is card-connected with the card joint, a partial structure of the card joint extends into the hose and abuts against the inner wall of the hose, the fixed sleeve is provided with positioning ribs, and the outer peripheral surface of the card joint is provided with a radially outwardly protruding positioning plate, and the positioning ribs of the fixed sleeve press the positioning plate of the card joint against the end face of the hose.

[0007] By adopting the above technical solution, when the fixing sleeve is fixed on the hose, the positioning ribs of the fixing sleeve abut against the positioning plate, so that the card connector is limited and fixed in the hose, preventing the card connector from falling out of the hose, thereby preventing the connector assembly from falling out of the hose.

[0008] Furthermore, a buffer pad is provided on the positioning rib, and the buffer pad abuts against the clamping joint.

[0009] By adopting the above-mentioned technical solution, the positioning rib abuts against the card joint through the buffer pad, which can prevent the positioning rib from making hard contact with the card joint and reduce the wear of the card joint caused by the positioning rib.

[0010] Furthermore, the outer peripheral surface of the clamping joint is also provided with a radially outwardly protruding limiting rib, the connecting head is a connecting nut, the inner hole wall of the connecting nut is provided with a skirt, and the skirt abuts against the limiting rib.

[0011] By adopting the above-mentioned technical solution, the skirt of the inner hole wall of the connecting nut is abutted against the limiting rib of the clamping joint, so that the connecting nut is limited on the clamping joint to prevent the connecting nut from falling off the clamping joint.

[0012] Furthermore, the hose comprises an inner rubber layer, a reinforcement layer and an outer rubber layer, the reinforcement layer is sleeved on the inner rubber layer, and the outer rubber layer is coated on the outer periphery of the reinforcement layer to protect the reinforcement layer.

[0013] By adopting the above-mentioned technical scheme, the inner rubber layer is the working layer of the hose in contact with the medium, which plays the role of sealing the medium and protecting the reinforcement layer. The reinforcement layer is the part of the hose that bears pressure, and at the same time gives the entire hose the necessary rigidity and strength. The outer rubber layer is the protective layer of the hose. The outer rubber layer protects the reinforcement layer to prevent foreign objects from corroding the reinforcement layer. At the same time, the outer rubber layer has a certain shock-absorbing effect, reducing the damage to the internal structure of the hose by external forces.

[0014] Furthermore, the positioning spike pierces the outer rubber layer, and the fixing sleeve is fixedly connected to the outer rubber layer.

[0015] By adopting the above technical solution, the outer rubber layer cooperates with the positioning spikes to fix the fixed sleeve to the outer rubber layer. At the same time, the outer rubber layer can fill the gaps between the positioning spikes on the inner wall of the fixed sleeve, thereby improving the matching strength and the sealing performance after the fixed connection.

[0016] Furthermore, the reinforcement layer is a steel wire braided layer.

[0017] By adopting the above-mentioned technical solution, due to the high strength of the steel wire, the tensile strength and load-bearing capacity of the hose can be effectively improved, so that the hose can withstand greater external loads and internal pressures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a partial structural schematic diagram of a low-pressure hose assembly of the utility model;

[0020] Figure 2 It is a schematic diagram of the fixed sleeve structure;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the hose;

[0022] Figure 4 Schematic diagram of the ball joint structure.

[0023] In the figure: hose 1, hose inner wall 11, hose outer wall 12, inner rubber layer 13, reinforcement layer 14, outer rubber layer 15, clamping joint 2, positioning plate 21, limiting rib 22, fixing sleeve 3, positioning spike 31, positioning rib 32, buffer pad 321, connector 4, connecting nut 41, ball joint 42, connecting hole 421, skirt 43. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0025] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0026] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0027] like Figures 1 to 4 As shown, the utility model provides a low-pressure hose assembly, including a hose 1, a joint assembly and a fixed sleeve 3, the joint assembly includes a clamping joint 2 and a connector 4, the connector 4 is clamped with the head end of the clamping joint 2, a part of the structure of the clamping joint 2 extends into the hose 1 and abuts against the inner wall 11 of the hose, the inner wall of the fixed sleeve 3 is provided with a positioning spike 31, the fixing sleeve 3 penetrates the outer wall 12 of the hose through the positioning spike 31 and is fixedly connected to the hose 1 and buckles the clamping joint 2 to prevent the clamping joint 2 from falling out of the hose 1.

[0028] The utility model extends a part of the structure of the joint assembly into the hose 1 and engages with the inner wall 11 of the hose, fixes the joint assembly inside the hose 1, forms a communicating state with the hose 1, and enables the hose 1 to be connected with other parts through the joint assembly, so that the liquid can be transported through the hose 1; since the fixed sleeve 3 is fixedly connected to the hose 1 by piercing the outer wall 12 of the hose through the positioning spike 31, and buckles the joint assembly to prevent the joint assembly from falling out of the hose 1, the positioning spike 31 penetrates the outer wall 12 of the hose, and the positioning spike 31 cooperates with the outer wall 12 of the hose to block the joint assembly from falling out of the hose, so that the connection between the fixed sleeve 3 and the hose 1 is more reliable, and the installation is simple, which reduces the difficulty of assembly and saves the time required for assembly.

[0029] In this embodiment, the connector assembly includes a card joint 2 and a connecting head 4, the connecting head 4 is card-connected with the card joint 2, a part of the structure of the card joint 2 extends into the hose 1 and abuts against the inner wall 11 of the hose, the fixed sleeve 3 is provided with a positioning rib 32, and the outer peripheral surface of the card joint 2 is provided with a radially outwardly protruding positioning plate 21, the positioning rib 32 of the fixed sleeve 3 presses the positioning plate 21 of the card joint 2 against the end face of the hose, when the card joint 2 extends into the hose 1, the positioning plate 21 abuts against the end face of the hose, at this time, the fixed sleeve 3 is fixed to the hose 1, and the positioning rib 32 of the fixed sleeve 3 can cooperate with the end face of the hose 1 to clamp the positioning plate 21, so that the tail end of the card joint 2 is limited and fixed in the hose 1, thereby further preventing the tail end of the card joint 2 from falling out of the hose 1.

[0030] In another embodiment, if Figure 4 As shown, the joint assembly includes a ball joint 42, part of the structure of the ball joint 42 extends into the interior of the hose 1, and the fixing sleeve 3 fixes the ball joint 42 to prevent the ball joint 42 from falling out of the hose 1; at the same time, a connecting hole 421 is also provided on the top of the ball joint 42, and the user connects the automobile fuel tank and other components through the connecting hole 421. Since the connecting hole 421 is located at the top of the ball joint, the hose 1 using the ball joint 42 can be used to connect scenes where the hose 1 needs to be bent, thereby reducing damage to the hose 1 caused by bending.

[0031] It can be understood that in one of the embodiments, the positioning plate 21 of the clamping joint 2 is replaced by a clamping groove, and a baffle is set at the front end of the positioning sleeve 3. The baffle extends into the clamping groove and cooperates with the clamping groove, so that the fixing sleeve 3 limits the clamping joint 2 to prevent it from falling out of the hose 1.

[0032] Specifically, a buffer pad 321 is provided on the positioning rib 32, and the buffer pad 321 abuts against the card joint 2. The positioning rib 32 abuts against the card joint 2 through the buffer pad 321, which can prevent the positioning rib 32 from making hard contact with the card joint 2 and reduce the wear of the positioning rib 32 on the card joint 2.

[0033] In this embodiment, the outer peripheral surface of the clamping joint 2 is also provided with a radially outwardly protruding limiting rib 22, the connecting head 4 is a connecting nut 41, and the inner hole wall of the connecting nut 41 is provided with a skirt 43, and the skirt 43 abuts against the limiting rib 22; the connecting nut 41 is limited on the clamping joint 2 by the abutment of the skirt 43 of the inner hole wall of the connecting nut 41 with the limiting rib 22 of the clamping joint, so as to prevent the connecting nut 41 from falling off from the clamping joint 2.

[0034] In this embodiment, if Figure 3As shown, the hose 1 includes an inner rubber layer 13, a reinforcement layer 14 and an outer rubber layer 15. The reinforcement layer 14 is sleeved on the inner rubber layer 13, and the outer rubber layer 15 is coated on the outer periphery of the reinforcement layer 14 to protect the reinforcement layer 14; the inner rubber layer 13 is the working layer of the hose 1 contacting the medium, and plays the role of sealing the medium and protecting the reinforcement layer 14. The reinforcement layer 14 is the part of the hose 1 that bears pressure, and also provides the necessary rigidity and strength to the entire hose 1. The outer rubber layer 15 is the protective layer of the hose 1. The outer rubber layer 15 protects the reinforcement layer 14 to prevent foreign objects from corroding the reinforcement layer 14. At the same time, the outer rubber layer 15 has a certain shock-absorbing effect, reducing the damage of external forces to the internal structure of the hose 1.

[0035] In other embodiments, the hose 1 further includes two additional layers, namely an inner rubber protective layer and an outer rubber protective layer; the inner rubber protective layer can prevent the inner rubber layer 13 from mechanical damage or chemical corrosion, while the outer rubber protective layer can protect the hose 1 from erosion and wear of the external environment.

[0036] In another embodiment, the hose 1 only includes an inner rubber layer 13 and an outer rubber layer 15 , and the outer rubber layer 15 is coated on the outer periphery of the inner rubber layer 13 to protect the inner rubber layer 13 .

[0037] Specifically, Figure 2 As shown, the positioning spikes 31 penetrate into the outer rubber layer 15, and the fixed sleeve 3 is fixedly connected to the outer rubber layer 15; the outer rubber layer 15 cooperates with the positioning spikes 31 to fix the fixed sleeve 3 to the surface of the outer rubber layer 15, and at the same time, the outer rubber layer 15 can fill the gap between the positioning spikes 31 on the inner wall of the fixed sleeve 3, thereby improving the matching strength and the sealing performance after the fixed connection.

[0038] In this embodiment, the reinforcement layer 14 is a steel wire braided layer. Due to the high strength of the steel wire, the tensile strength and load-bearing capacity of the hose 1 can be effectively improved, so that the hose 1 can withstand greater external loads and internal pressures.

[0039] In other embodiments, the reinforcing layer 14 may be woven from other fiber materials, such as polyester fiber, nylon fiber, etc. The fiber material has excellent strength and toughness, and can enhance the pressure bearing capacity and tensile strength of the hose 1.

[0040] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A low-pressure hose assembly, comprising a hose, a connector assembly and a fixing sleeve, characterized in that: The partial structure of the joint assembly extends into the hose and abuts against the inner wall of the hose. The inner wall of the fixed sleeve is provided with a positioning spike. The fixed sleeve penetrates into the outer wall of the hose through the positioning spike and is fixedly connected to the hose and buckles the joint assembly to prevent the joint assembly from falling out of the hose. The hose comprises an inner rubber layer, a reinforcement layer and an outer rubber layer. The reinforcement layer is sleeved on the inner rubber layer, and the outer rubber layer is coated on the outer periphery of the reinforcement layer to protect the reinforcement layer. The positioning spike penetrates into the outer rubber layer, and there is a gap between the positioning spike and the reinforcement layer. The joint assembly comprises a card joint and a connecting joint. The connector is clamped with the card connector, part of the structure of the card connector extends into the hose and abuts against the inner wall of the hose, the fixed sleeve is provided with positioning ribs, the outer peripheral surface of the card connector is provided with a radially outwardly protruding positioning plate, the positioning ribs of the fixed sleeve press the positioning plate of the card connector against the end face of the hose, the positioning ribs are provided with a buffer pad, the buffer pad abuts against the card connector, the outer peripheral surface of the card connector is also provided with a radially outwardly protruding limiting rib, the connector is a connecting nut, the inner hole wall of the connecting nut is provided with a skirt, and the skirt abuts against the limiting rib.

2. A low-pressure hose assembly according to claim 1, characterized in that: The fixing sleeve is fixedly connected to the outer rubber layer.

3. A low-pressure hose assembly according to claim 1, characterized in that: The reinforcement layer is a steel wire braided layer.

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