Flexible wear-resistant metal hose

Abstract

The utility model relates to the technical field of metal hoses, in particular to a flexible wear-resistant metal hose which comprises a corrugated pipe, a wear-resistant layer arranged outside the corrugated pipe and a steel wire mesh sleeve arranged outside the wear-resistant layer. The end part of the steel wire mesh sleeve is fixedly connected with the sleeve; the wear-resistant layer is arranged between the corrugated pipe and the steel wire mesh sleeve, so that the wear between the corrugated pipe and the steel wire mesh sleeve caused by vibration can be greatly reduced, and the service life of the hose is prolonged; according to the utility model, the problem of mutual abrasion between the corrugated pipe and the steel wire mesh sleeve can be effectively prevented, and safe and stable operation of the nuclear power station is ensured.

Description

Technical Field

[0001] This utility model relates to the field of metal hose technology, specifically a flexible wear-resistant metal hose. Background Technology

[0002] Metal flexible hoses, with their advantages of high pressure resistance, corrosion resistance, and high flexibility, are widely used in pipeline systems. In nuclear power plants, metal flexible hoses are used in over 30 systems, with hundreds used in a single unit. Due to the paramount importance of safety and stable operation in nuclear power plants, high requirements are placed on the reliability and lifespan of metal flexible hoses. For example, Chinese patent application number 202020688196.9 discloses a wear-resistant composite metal flexible hose. This hose, from the inside out, comprises a corrugated pipe, a high-oxygen silica fiber sleeve, and a steel wire mesh sleeve. Connectors include a connecting pipe, a fixing ring, a welding flange, a loose flange, and a sealing seat. Connecting pipes are attached to both ends of the corrugated pipe, and rings are fitted to both ends of the steel wire mesh sleeve. The connecting pipe at one end of the corrugated pipe is fitted into the loose flange and connected to the sealing seat, while the connecting pipe at the other end of the corrugated pipe is welded to the welding flange. However, during long-term operation, the corrugated pipe and the steel wire mesh sleeve will experience mutual wear under vibration, posing a certain risk to the safe and stable operation of the nuclear power plant. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned shortcomings by providing a flexible, wear-resistant metal hose that effectively prevents the corrugated pipe from rubbing against the wire mesh sleeve, thus ensuring the safe and stable operation of the nuclear power plant.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A flexible wear-resistant metal hose includes a corrugated pipe, a wear-resistant layer disposed outside the corrugated pipe, a wire mesh sleeve disposed outside the wear-resistant layer, connecting pipes fixedly connected to both ends of the corrugated pipe, a sleeve fixedly sleeved on the connecting pipe, and the end of the wire mesh sleeve fixedly connected to the sleeve.

[0006] Furthermore, the wear-resistant layer includes an aramid 1414 thread sleeve fitted outside the corrugated pipe, and multiple aramid 1414 binding threads used to bind and fix the aramid 1414 thread sleeve in the trough of the corrugated pipe.

[0007] Furthermore, the aramid 1414 yarn sleeve is made of tightly woven aramid 1414 yarn.

[0008] Furthermore, starting from the trough of the first wave of the bellows, the bellows is tied every two waves. After tying it three times, the bellows near the middle of the bellows are tied every 7-10 troughs.

[0009] Furthermore, the end of the aramid 1414 thread sleeve extends into the space between the connector and the sleeve for fixation.

[0010] Furthermore, a flange is connected to the end of the connector away from the bellows.

[0011] The beneficial effects of this utility model are:

[0012] In practical applications, by setting a wear-resistant layer between the corrugated pipe and the wire mesh sleeve, the wear between the corrugated pipe and the wire mesh sleeve caused by vibration can be significantly reduced, extending the service life of the hose. This utility model can effectively prevent the problem of mutual wear between the corrugated pipe and the wire mesh sleeve, ensuring the safe and stable operation of the nuclear power plant.

[0013] The wear-resistant layer is made of aramid 1414 material, which has good wear resistance and will not produce environmentally polluting or human-harmful debris.

[0014] The wear-resistant layer is made of aramid 1414 yarn braided from aramid 1414 yarn. The elasticity of the yarn sleeve is significantly increased compared to aramid yarn, overcoming the problem that aramid 1414 yarn has low elongation and poor elasticity and cannot meet the large changes in yarn length caused by bending of the hose.

[0015] The aramid 1414 thread sheath is fixed by multiple bindings, which overcomes the problem that the aramid 1414 thread has a low coefficient of friction and is prone to detachment and displacement when the hose is bent.

[0016] The sleeves and binding threads are made of aramid 1414 thread, covering the entire surface of the corrugated pipe. They are lightweight and uniform in weight, which can effectively avoid the problem of uneven weight caused by the hose structure, resulting in localized vibration under vibration, leading to localized premature fatigue failure or accelerated localized wear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the corrugated pipe and the wear-resistant layer in this utility model;

[0019] Figure reference numerals: 1. Corrugated pipe; 2. Aramid 1414 wire sleeve; 3. Aramid 1414 binding wire; 4. Wire mesh sleeve; 5. Sleeve; 6. Connecting pipe; 7. Flange. Detailed Implementation

[0020] like Figure 1 and Figure 2As shown, a flexible wear-resistant metal hose includes a corrugated pipe 1, a wear-resistant layer disposed outside the corrugated pipe 1, a wire mesh sleeve 4 disposed outside the wear-resistant layer, connecting pipes 6 fixedly connected to both ends of the corrugated pipe 1, a sleeve 5 fixedly sleeved on the connecting pipe 6, and the end of the wire mesh sleeve 4 fixedly connected to the sleeve 5.

[0021] By setting a wear-resistant layer between the corrugated pipe 1 and the wire mesh sleeve 4, the wear between the corrugated pipe 1 and the wire mesh sleeve 4 caused by vibration can be significantly reduced, extending the service life of the hose. This utility model can effectively prevent the problem of mutual wear between the corrugated pipe 1 and the wire mesh sleeve 4, ensuring the safe and stable operation of the nuclear power plant.

[0022] like Figure 1 and Figure 2 As shown, the wear-resistant layer includes an aramid 1414 thread sleeve 2 sleeved outside the corrugated pipe 1, and multiple aramid 1414 binding threads 3 used to bind and fix the aramid 1414 thread sleeve 2 in the trough of the corrugated pipe 1. In this embodiment, by sandwiching the aramid 1414 thread sleeve 2 between the corrugated pipe 1 and the wire mesh sleeve 4, the aramid 1414 thread sleeve 2 is sleeved and covered on the outer surface of the corrugated pipe 1, and the aramid 1414 thread sleeve 2 is bound and fixed in the trough of the corrugated pipe 1 by multiple aramid 1414 binding threads 3, the high wear resistance of aramid is utilized to achieve the requirement of no wear for 10 years under long-term vibration and displacement superposition conditions.

[0023] like Figure 1 and Figure 2 As shown, the aramid 1414 thread sleeve 2 is made of tightly woven aramid 1414 thread; in this embodiment, the wear-resistant layer is made of several tightly woven aramid 1414 fiber threads, which can not only alleviate the problem of mutual wear between the corrugated pipe 1 and the wire mesh sleeve 4, but also has a certain degree of flexibility.

[0024] like Figure 1 and Figure 2 As shown, starting from the trough of the first wave of the corrugated pipe 1, it is bundled once every two waves. After bundling three times, the waves near the middle of the corrugated pipe 1 are bundled once every 7-10 troughs. In this embodiment, since the vibration and displacement near the end of the metal hose are more severe during use, bundling once every two waves near the trough of the end of the corrugated pipe 1 can effectively prevent the aramid 1414 thread sleeve 2 at the end of the metal hose from shifting. Since the vibration and displacement near the middle of the metal hose are less severe during use, bundling once every 7-10 troughs near the middle of the metal hose can effectively reduce the number of times the aramid 1414 binding thread 3 is bundled.

[0025] like Figure 1 and Figure 2As shown, the end of the aramid 1414 thread sleeve 2 extends into the space between the connector 6 and the sleeve 5 for fixation; in this embodiment, fixing the end of the aramid 1414 thread sleeve 2 by the connector 6 and the sleeve 5 can further prevent the aramid 1414 thread sleeve 2 from shifting during use.

[0026] like Figure 1 and Figure 2 As shown, the end of the connecting pipe 6 away from the corrugated pipe 1 is connected to a flange 7; in this embodiment, the metal hose can be connected through the flange 7.

[0027] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. A flexible, wear-resistant metal hose, characterized in that: It includes a corrugated pipe (1), a wear-resistant layer disposed outside the corrugated pipe (1), a wire mesh sleeve (4) disposed outside the wear-resistant layer, and pipes (6) are fixedly connected to both ends of the corrugated pipe (1). A sleeve (5) is fixedly sleeved on the pipe (6), and the end of the wire mesh sleeve (4) is fixedly connected to the sleeve (5).

2. The flexible wear-resistant metal hose according to claim 1, characterized in that, The wear-resistant layer includes an aramid 1414 thread sleeve (2) sleeved outside the corrugated pipe (1) and multiple aramid 1414 binding threads (3) used to bind and fix the aramid 1414 thread sleeve (2) in the trough of the corrugated pipe (1).

3. The flexible wear-resistant metal hose according to claim 2, characterized in that, The aramid 1414 yarn sleeve (2) is made of tightly woven aramid 1414 yarn.

4. The flexible wear-resistant metal hose according to claim 2, characterized in that, Starting from the trough of the first wave of the bellows (1), tie it once for every two waves. After tying it three times, tie it once for every 7-10 troughs of the waves near the middle of the bellows (1).

5. A flexible wear-resistant metal hose according to claim 2, characterized in that, The end of the aramid 1414 thread sleeve (2) extends into the space between the connector (6) and the sleeve (5) and is fixed.

6. The flexible wear-resistant metal hose according to claim 1, characterized in that, The end of the connecting pipe (6) away from the bellows (1) is connected to a flange (7).

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