Wear-resistant metal hose

Abstract

The utility model relates to metal hose related technical field discloses a kind of wear-resistant metal hoses, the utility model includes bellows body, spiral winding wear-resistant layer is present on the bellows body outer wall, wear-resistant layer outside cladding metal braiding net cover, heat insulating coating is equipped between wear-resistant layer and bellows body.The utility model can reach the purpose of dispersion wear stress by the setting of bellows body and spiral wear-resistant layer, and the setting cooperation of wear-resistant layer and metal braiding net cover can reach the purpose of double anti-abrasion, and the setting mode of wear-resistant layer spiral winding can form discontinuous protective zone in axial direction, both dispersion wear stress, and retain bellows bending freedom, to greatly improve the performance of metal hose, by the setting of clamping pressure type joint, it can be guaranteed to make trapezoidal shock-absorbing ring absorb vibration energy, and conical locking structure prevents braiding net cover end steel wire to scatter.

Description

Technical Field

[0001] This utility model relates to the technical field of metal hoses, and in particular to a wear-resistant metal hose. Background Technology

[0002] Metal flexible hoses are an important component in the connection pipelines of modern industrial equipment. They are used as protective conduits for wires and cables, signal wires and cables of automated instruments, and shower hoses in civilian applications.

[0003] From the perspective of the significant role of corrugated pipes as the body of metal flexible hoses, the development of metal corrugated pipes also signifies the development of metal flexible hoses. Subsequently, people have covered the outer surface of corrugated pipes with materials such as rubber, plastic, or nylon, armored them with a braided sleeve made of metal wires or metal strips, and changed various joint forms, creating a variety of forms of metal flexible hoses to meet different requirements under various usage conditions.

[0004] Most existing metal hoses are single-layer corrugated pipes, which makes the inner wall easily eroded and worn when conveying media containing solid particles, leading to leakage risks. Furthermore, after strengthening its structure, the connection between the braided mesh and the corrugated pipe is prone to friction due to vibration, which accelerates structural fatigue and results in excessive local stress concentration, causing the life of the metal hose to be greatly shortened. In order to solve these problems, a wear-resistant metal hose is proposed. Utility Model Content

[0005] This invention provides a wear-resistant metal hose, which solves the problems mentioned in the background art.

[0006] The technical problem solved by this utility model is achieved through the following technical solution:

[0007] A wear-resistant metal hose includes a corrugated pipe body, the outer wall of which is spirally wound with a wear-resistant layer, and the outer side of the wear-resistant layer is covered with a metal braided mesh sleeve. A heat-insulating coating is provided between the wear-resistant layer and the corrugated pipe body. The two ends of the metal braided mesh sleeve are fixedly connected to the corrugated pipe body through a press-fit connector, and a shock-absorbing ring is embedded inside the press-fit connector.

[0008] Preferably, the wear-resistant layer is formed by composite sintering of alumina ceramic particles and a metal substrate.

[0009] Preferably, the weaving angle of the metal woven mesh sleeve is 45° to 60°, and the material is 316L stainless steel wire.

[0010] Preferably, the press-fit connector includes an inner conical locking sleeve and an outer pressure ring, wherein the inner conical locking sleeve is interference-fitted with the end of the bellows body.

[0011] Preferably, the shock-absorbing ring is a silicone rubber ring with a trapezoidal cross-section.

[0012] Preferably, the heat-insulating coating is a nano-aerogel composite material.

[0013] The advantages and positive effects of this utility model are as follows: the corrugated pipe body and the spiral wear-resistant layer can achieve the purpose of dispersing wear stress, and the wear-resistant layer and the metal braided mesh sleeve can achieve the purpose of dual wear resistance. The spiral winding of the wear-resistant layer can form a discontinuous protective band in the axial direction, which can both disperse wear stress and retain the bending freedom of the corrugated pipe, thereby greatly improving the performance of the metal hose. The clamp-type joint can ensure that the trapezoidal shock-absorbing ring absorbs vibration energy, and the conical locking structure prevents the steel wires at the end of the braided mesh sleeve from unraveling. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] The markings in the attached diagram are described below:

[0017] Bellows body;

[0018] Wear-resistant layer;

[0019] Metal woven mesh sleeve;

[0020] Heat insulation coating;

[0021] Press-fit connector; 51. Inner tapered locking sleeve; 52. Outer pressure ring;

[0022] Shock-absorbing ring. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention. The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0024] Reference Figure 1As shown, metal flexible hoses are an important component in the connection pipelines of modern industrial equipment. They are used as protective conduits for wires and cables, signal cables for automated instruments, and shower hoses in civilian applications. The development of corrugated pipes as the body of the metal flexible hose is significant. The development of corrugated metal pipes also signifies the development of metal flexible hoses. Subsequently, materials such as rubber, plastic, or nylon were coated onto the outer surface of the corrugated pipe, and a braided sheath composed of metal wires or strips was added. Various joint forms were created to adapt to different requirements under various usage conditions. Most existing metal flexible hoses are single-layer corrugated pipes, which makes the inner wall easily eroded and worn when conveying media containing solid particles, leading to leakage risks. Furthermore, after strengthening the structure, the connection between the braided sheath and the corrugated pipe is prone to friction due to vibration, accelerating structural fatigue and resulting in excessive local stress concentration, significantly shortening the lifespan of the metal flexible hose. To solve these problems, a wear-resistant metal flexible hose is proposed, including a corrugated pipe body 1, the outer wall of which is spirally wound with a wear-resistant material. The wear-resistant layer 2 is covered with a metal braided mesh sleeve 3 on its outer side. A heat-insulating coating 4 is provided between the wear-resistant layer 2 and the corrugated pipe body 1. The two ends of the metal braided mesh sleeve 3 are fixedly connected to the corrugated pipe body 1 through a crimp-type connector 5. A shock-absorbing ring 6 is embedded in the inner side of the crimp-type connector 5. The corrugated pipe body and the spiral wear-resistant layer can achieve the purpose of dispersing wear stress. The combination of the wear-resistant layer and the metal braided mesh sleeve can achieve the purpose of dual wear resistance. The spiral winding method of the wear-resistant layer can form a discontinuous protective band in the axial direction, which can both disperse wear stress and retain the bending freedom of the corrugated pipe, thereby greatly improving the performance of the metal hose. The crimp-type connector can ensure that the trapezoidal shock-absorbing ring absorbs vibration energy, and the conical locking structure prevents the steel wires at the end of the braided mesh sleeve from unraveling.

[0025] It should be noted that the corrugated pipe body is made of 304 stainless steel with a 5mm corrugated pitch. This design is intended to provide basic flexibility and sufficient pressure resistance.

[0026] Furthermore, a nano-aerogel layer is sprayed onto the outer wall of the corrugated pipe to isolate the high-temperature medium from the heat radiation of the wear-resistant layer and prevent the ceramic layer from becoming brittle.

[0027] Additionally, the specific material composition of the spiral-wound wear-resistant layer 2 is as follows: alumina ceramic particles (particle size 80μm) are mixed with nickel-based alloy powder and then wound and sintered by plasma spraying with a pitch of 8mm. Of course, the specific dimensions, pitch and other specifications can be determined according to the actual situation and do not necessarily have to be implemented according to this embodiment. The effect of the above structure is that the ceramic layer can form a discontinuous protective band in the axial direction, which can both disperse wear stress and retain the bending freedom of the bellows.

[0028] It should also be noted that the specific structure of the metal woven mesh sleeve 3 is as follows: the mesh sleeve is woven with 316L stainless steel wire with a diameter of 0.15mm at a 55° angle, and 10mm connection ends are reserved at both ends after the sleeve is covered; the effect of this setting is that the 55° weaving angle allows the mesh sleeve to deform synchronously when worn axially / radially, avoiding local breakage.

[0029] Furthermore, the effect of assembling the press-fit connector 5 is as follows: the shock-absorbing ring 6 (made of silicone rubber, trapezoidal cross section) is embedded into the inner groove of the connector; and the outer pressure ring 52 is pressed with hydraulic clamps so that the inner conical locking sleeve 51 forms an interference fit with the end of the bellows; the effect achieved is that the trapezoidal shock-absorbing ring absorbs vibration energy, and the conical locking structure prevents the steel wires at the end of the woven mesh sleeve from unraveling.

[0030] In practical applications, such as when conveying slurry or other contaminants, the lifespan of traditional hoses is ≤3 months, while the lifespan of hoses in this solution is over 12 months, and wear only occurs on the replaceable wear-resistant layer surface.

[0031] It is worth mentioning that the effects of the above structures are as follows: the spiral wear-resistant layer 2 can disperse the wear path, and the overall sealing performance is not affected after local wear, thus reducing the replacement cost; the heat insulation coating 4 can reduce the damage of thermal stress to the ceramic layer, thus increasing the wear-resistant layer life by 2 times; the metal woven mesh sleeve can enhance the cooperative deformation ability and improve the fatigue strength; the press-fit joint + shock-absorbing ring can eliminate fretting wear at the connection and extend the life under vibration conditions.

[0032] It should be noted that the stability of the above components after assembly can be ensured by installing the crimp connector 5.

[0033] Furthermore, traditional hoses need to be replaced as a whole after they wear out, with the cost of a single hose exceeding 10,000 yuan. In reality, wear is concentrated in local sections of the hose where the medium flows, and scrapping the whole hose results in a waste of resources. The wear-resistant metal hose in this embodiment can greatly reduce the cost and time required for a better hose.

[0034] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A wear-resistant metal hose, comprising a corrugated hose body (1), characterized in that: The outer wall of the corrugated pipe body (1) is spirally wound with a wear-resistant layer (2), and the wear-resistant layer (2) is covered with a metal braided mesh sleeve (3). A heat insulation coating (4) is provided between the wear-resistant layer (2) and the corrugated pipe body (1). The two ends of the metal braided mesh sleeve (3) are fixedly connected to the corrugated pipe body (1) through a snap-fit ​​connector (5). A shock-absorbing ring (6) is embedded inside the snap-fit ​​connector (5).

2. The wear-resistant metal hose according to claim 1, characterized in that: The wear-resistant layer (2) is formed by composite sintering of alumina ceramic particles and metal substrate.

3. The wear-resistant metal hose according to claim 1, characterized in that: The metal woven mesh sleeve (3) has a weaving angle of 45° to 60° and is made of 316L stainless steel wire.

4. The wear-resistant metal hose according to claim 1, characterized in that: The press-fit connector (5) includes an inner conical locking sleeve (51) and an outer pressure ring (52), with the inner conical locking sleeve (51) having an interference fit with the end of the bellows body (1).

5. The wear-resistant metal hose according to claim 1, characterized in that: The shock-absorbing ring (6) is a silicone rubber ring with a trapezoidal cross-section.

6. The wear-resistant metal hose according to claim 1, characterized in that: The heat insulation coating (4) is a nano-aerogel composite material.

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