Telescopic airtight hose for large diesel engine of nuclear power plant

Abstract

The invention belongs to the technical field of ventilation hoses, and particularly relates to a telescopic airtight hose for a large diesel engine of a nuclear power plant. The outer steel wire rings are sequentially and alternately arranged in the axial direction of the hose body to enable the hose body to be corrugated and wrap the outer surface of the hose body, the inner steel wire rings are supported on the inner wall of the hose body, and the radial size of the inner steel wire rings is larger than that of the outer steel wire rings. Turnups which extend and turn over in the radial direction of the hose body are arranged at the two ends of the hose body, and the steel wire rings on the adjacent sides of the turnups on the hose body are outer steel wire rings. And a flange connecting hole is formed in the turned-over edge. The problem of connection stability between the steel wire and the hose in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation hoses, and in particular relates to a telescopic airtight hose for a large diesel engine in a nuclear power plant. Background Art

[0002] The emergency diesel unit is the ultimate guarantee for the availability of the dynamic safety equipment of the nuclear power plant. During the use of the rubber hose ventilation and exhaust system of the emergency diesel unit, although the technologies in the design, construction, and replacement of special rubber hoses have become mature, after long-term use, the rubber hoses are very likely to age and fail, causing serious economic losses and immeasurable engineering hazards.

[0003] In ventilation and exhaust systems, retractable hoses are widely used due to their flexibility, bendability, retractability, and easy installation. If retractable hoses can be used instead of rubber hoses and applied to diesel units, the problems existing in traditional rubber hoses can be solved.

[0004] As for traditional telescopic hoses, flexible film materials are generally used, which are composited into double or multiple layers through gluing or hot-melt processes, with steel wires sandwiched in the middle. The disadvantages are: 1) The hose does not form corrugations; in order to achieve the flexibility and elasticity of the pipeline, a film material with good flexibility and small thickness (generally not more than 1mm) must be used; 2) The material used must be suitable for gluing or hot-melt composite processes; 3) In order to achieve a better composite effect, the diameter of the steel wire is generally less than 2.0mm. The steel wire is composited and fixed by two layers of film. If the diameter of the steel wire is too large, it will cause the steel wire and the hose to be difficult to bond and fix, and it is easy to open the glue, which cannot meet the use requirements.

[0005] Therefore, a retractable airtight hose for a large diesel engine in a nuclear power plant is needed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a retractable airtight hose for a large diesel engine in a nuclear power plant, so as to solve the problem of connection stability between a steel wire and a hose in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A telescopic airtight hose for a large diesel engine in a nuclear power plant comprises a hose body, an outer steel wire ring wrapped around the outer surface of the hose body and an inner steel wire ring supported on the inner wall of the hose body, which are alternately arranged in sequence along the axial direction of the hose body to form a corrugated shape of the hose body, and the radial size of the inner steel wire ring is larger than the radial size of the outer steel wire ring.

[0009] The compression amount of the hose body is adjusted by adjusting the diameter difference between the inner wire ring and the outer wire ring.

[0010] Both ends of the hose body are provided with flanges extending and turning along the radial direction of the hose body, and the wire rings on the sides adjacent to the flanges on the hose body are outer wire rings.

[0011] The flange is integrally arranged with the hose body.

[0012] A flange connection hole is provided on the flange.

[0013] The radial dimension of the flange is larger than the radial dimension of the inner wire ring.

[0014] The radial dimension of the flange is larger than the radial dimension of the outer wire ring.

[0015] The outer wire ring and the inner wire ring are made of carbon steel or stainless steel, and the wire diameter is 2-10mm.

[0016] The hose body is made of silicone cloth.

[0017] The thickness of the hose body is 0.3-5.0mm.

[0018] The beneficial effects achieved by the present invention are:

[0019] 1. By alternately arranging outer wire rings and inner wire rings on the hose body, and utilizing the radial difference formed between the outer wire rings and the inner wire rings, the hose body is formed into a pipe corrugation, thereby realizing the requirement that the hose body can be bent and stretched.

[0020] 2. By utilizing the radial difference between the outer wire ring and the inner wire ring, tension is formed on the hose body between the adjacent outer wire rings and the inner wire rings, so that the outer wire ring and the inner wire ring are stably supported in the hose body, and there are no requirements for the softness, thickness, stickiness or hot melt of the hose body material, thereby improving the stability of the hose body.

[0021] 3. The compression of the hose body can be adjusted by adjusting the diameter difference between the inner and outer wire rings. It is suitable for forming corrugations of the hose body with poor adhesiveness and materials that are not suitable for hot melting.

[0022] 4. By arranging outer wire rings on the hose body and adjacent to the flanges, the outer wire rings at both ends can be prevented from falling off, thereby ensuring the stability of the outer wire rings on the hose body. In addition, the flanges arranged at both ends of the hose body are integrated with the hose body, thereby ensuring the sealing performance of the hose body.

[0023] The present invention uses a combination of weather-resistant silicone cloth and internally and externally nested steel wire rings to make the airtight hose have the characteristics of high negative pressure resistance, not easy to age, good flexibility, easy to bend, easy to retract, and easy to install. It replaces the traditional rubber process hose and solves the problem of localization of imported spare parts through process improvement. At the same time, a new retractable airtight hose for large diesel engines in nuclear power plants is developed and designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a retractable airtight hose for a large diesel engine in a nuclear power plant;

[0025] Figure 2 This is a schematic diagram of the flange structure of a retractable airtight hose for a large diesel engine in a nuclear power plant;

[0026] Figure 3 This is a schematic diagram of the structure of the outer wire ring of a retractable airtight hose for a large diesel engine in a nuclear power plant;

[0027] In the figure, 1. Hose body; 2. Outer wire ring; 3. Inner wire ring; 4. Flanged edge; 5. Flange hole. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] See also Figures 1 to 3 The present invention provides a retractable airtight hose for a large diesel engine in a nuclear power plant, comprising a hose body 1, an outer steel wire ring 2 wrapped around the outer surface of the hose body 1 and an inner steel wire ring 3 supported on the inner wall of the hose body 1, which are alternately arranged on the hose body 1 and along the axial direction of the hose body 1 to form a corrugated shape of the hose body 1, the radial dimension of the inner steel wire ring 3 is larger than the radial dimension of the outer steel wire ring 2, and the outer steel wire ring 2 and the inner steel wire ring 3 are axially spaced.

[0030] By alternately arranging outer wire rings 2 and inner wire rings 3 on the hose body 1, the radial difference formed between the outer wire rings 2 and the inner wire rings 3 is utilized to form pipe corrugations on the hose body 1, thereby realizing the requirements of the hose body 1 being bendable and retractable. At the same time, the radial difference between the outer wire rings 2 and the inner wire rings 3 can be utilized to form tension on the hose body 1 between adjacent outer wire rings 2 and inner wire rings 3, so that the outer wire rings 2 and the inner wire rings 3 are stably supported in the hose body 1, and there are no requirements for the softness, thickness, easy adhesion or hot meltability of the material of the hose body 1, thereby improving the use stability of the hose body 1. The compression amount of the hose body 1 can be adjusted by adjusting the diameter difference between the inner and outer wire rings 2, and it is suitable for the hose body 1 with poor adhesion and not suitable for hot melting to cooperate with each other to form the corrugations of the hose body 1.

[0031] Both ends of the hose body 1 are provided with flanges 4 extending and flipped along the radial direction of the hose body 1, and the wire ring on the hose body 1 adjacent to the flange 4 is an outer wire ring 2. By arranging the outer wire ring 2 on the hose body 1 adjacent to the flange 4, it is possible to avoid the outer wire ring 2 at both ends from falling off, thereby ensuring the stability of the outer wire ring 2 on the hose body 1. In addition, the flanges 4 arranged at both ends of the hose body 1 are integrated with the hose body 1, which can ensure the sealing of the hose body 1 during use. Compared with the traditional external ring method, the sealing is better.

[0032] A flange connection hole 5 is provided on the flange 4, and the radial dimension of the flange 4 is larger than the radial dimension of the inner wire ring 3. The setting of the flange connection hole 5 can facilitate the installation of the flange 4 on the pipeline and match it with the pipeline flange. Setting the radial dimension of the flange 4 larger than the radial dimension of the inner wire ring 3 can increase the contact area between the flange 4 and the external flange seat, improve the adaptability of the flange 4 and the external parts, and improve the sealing performance of the flange 4.

[0033] A flange connection hole 5 is provided on the flanging 4, and the radial dimension of the flanging 4 is larger than the radial dimension of the outer wire ring 2, so as to prevent the outer wire ring 2 from falling off the hose body 1 and ensure the stability of the hose body 1. The outer wire ring 2 and the inner wire ring 3 are made of carbon steel or stainless steel, and the wire diameter is 2.0-10mm. The outer wire ring 2 and the inner wire ring 3 made of carbon steel or stainless steel can meet the use requirements of high-pressure occasions, and the material thickness and wire diameter can also be selected according to the strength requirements of the hose body 1. The hose body 1 is made of silicone cloth, and the thickness of the hose body 1 is 0.3-5.0mm, so as to ensure the stability of the hose body 1 itself.

[0034] Embodiment: The two ends of the hose body are provided with flanges extending and turning along the radial direction of the hose body, and the wire rings on the hose body and adjacent to the flanges are outer wire rings. By providing outer wire rings on the hose body and adjacent to the flanges, the outer wire rings at both ends can be prevented from falling off, and the stability of the outer wire rings on the hose body can be ensured. Moreover, the flanges provided at both ends of the hose body are integrated with the hose body, which can ensure the sealing of the hose body in use. Compared with the traditional external ring method, the sealing is better. The flange is provided with a flange connection hole, and the radial size of the flange is larger than the radial size of the inner wire ring. The setting of the flange connection hole can facilitate the flange to be installed on the pipeline and matched with the pipeline flange. The radial size of the flange is larger than the radial size of the inner wire ring, which can increase the contact area between the flange and the external flange seat, improve the adaptability of the flange and the external connection, and improve the sealing of the flange in use. The flange is provided with a flange connection hole, and the radial size of the flange is larger than the radial size of the outer wire ring. Avoid the situation where the outer wire ring falls off the hose body, and ensure the stability of the hose body. The outer wire ring and the inner wire ring are made of carbon steel or stainless steel. The outer wire ring and the inner wire ring made of carbon steel or stainless steel can meet the use requirements of high-pressure occasions, and the material thickness and wire diameter can also be selected according to the strength requirements of the hose body. The hose body is made of silicone cloth to ensure the stability of the hose body itself.

Claims

1. A retractable airtight hose for a large diesel engine in a nuclear power plant, characterized in that: It includes a hose body, an outer steel wire ring wrapped around the outer surface of the hose body and an inner steel wire ring supported on the inner wall of the hose body, which are alternately arranged along the axial direction of the hose body to form a corrugated shape, and the radial size of the inner steel wire ring is larger than the radial size of the outer steel wire ring.

2. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 1, characterized in that: The compression amount of the hose body is adjusted by adjusting the diameter difference between the inner wire ring and the outer wire ring.

3. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 1, characterized in that: Both ends of the hose body are provided with flanges extending and turning along the radial direction of the hose body, and the wire rings on the sides adjacent to the flanges on the hose body are outer wire rings.

4. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 3, characterized in that: The flange is integrally arranged with the hose body.

5. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 3 is characterized in that: A flange connection hole is provided on the flange.

6. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 3, characterized in that: The radial dimension of the flange is larger than the radial dimension of the inner wire ring.

7. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 3, characterized in that: The radial dimension of the flange is larger than the radial dimension of the outer wire ring.

8. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 1, characterized in that: The outer wire ring and the inner wire ring are made of carbon steel or stainless steel, and the wire diameter is 2-10mm.

9. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 1, characterized in that: The hose body is made of silicone cloth.

10. The retractable airtight hose for large diesel engines in nuclear power plants according to claim 1, characterized in that: The thickness of the hose body is 0.3-5.0mm.

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