Spiral winding welding type metal corrugated pipe with good compression resistance effect

Abstract

The utility model relates to the technical field of filling machines, and discloses a spiral winding welding type metal corrugated pipe with a good compression resistance effect, which comprises a corrugated pipe body and a corrugated pipe outer spiral groove, a compression resistance layer is arranged on the surface of the corrugated pipe body, and the compression resistance layer comprises an insulating layer, a protective layer, a buffer layer and a reinforcing layer. And the insulating layer is positioned on the outer surface of the compression-resistant layer. According to the utility model, the insulating layer is used for improving the wear resistance, water resistance and corrosion resistance, the protective layer is used for improving the compressive strength and the longitudinal tensile strength of the corrugated pipe body, and the buffer layer is used for absorbing the external pressure on the corrugated pipe body and diffusing the pressure, so that the pressure is prevented from directly acting on the corrugated pipe body; the corrugated pipe body is protected from being damaged by pressure, the reinforcing layer is used for improving the anti-pressure capability, so that the corrugated pipe body is further prevented from being extruded by external acting force, and the effects of improving the compressive strength and preventing corrosion are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal bellows, in particular to a spirally wound welded metal bellows with good pressure resistance. Background Art

[0002] Spiral wound welded metal bellows are made of cold rolled steel strip or galvanized steel strip which is corrugated on a pipe reel and then spirally interlocked. According to the cross-sectional shape, they are divided into round and flat shapes. The appearance is like a regular wave-like pipe. Commonly used metal bellows are made of carbon steel and stainless steel, as well as steel lined with plastic, aluminum, etc. They are mainly used for connecting pipes to pipes or equipment in situations where a very small bending radius non-concentric axial transmission is required, or irregular turning, expansion, or where it is not convenient to install with fixed elbows.

[0003] Since the existing spirally wound welded metal bellows are easily deformed after being squeezed, and their surfaces are easily corroded or broken after long-term use, which limits their service life, technical personnel in this field now propose a spirally wound welded metal bellows with good compression resistance to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a spirally wound welded metal bellows with good compression resistance, aiming to improve the problem that the spirally wound welded metal bellows in the prior art are easily deformed after being squeezed, and their surfaces are easily corroded or broken after long-term use.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a spirally wound welded metal bellows with good pressure resistance, comprising a bellows body and an outer spiral groove of the bellows, wherein a pressure-resistant layer is arranged on the surface of the bellows body, and the pressure-resistant layer comprises an insulating layer, a protective layer, a buffer layer and a reinforcing layer, wherein the insulating layer is located on the outer surface of the pressure-resistant layer, the buffer layer is located on the inner side of the protective layer, and the reinforcing layer is located on the inner side of the buffer layer.

[0006] As a further description of the above technical solution:

[0007] The insulating layer is made of polyethylene material, and the thickness of the insulating layer is 0.2 mm.

[0008] As a further description of the above technical solution:

[0009] The protective layer is a metal woven mesh layer, and the protective layer is embedded in the insulating layer.

[0010] As a further description of the above technical solution:

[0011] The buffer layer is a sponge-like strip made of semi-conductive polyester non-woven fiber cloth, and the thickness of the buffer layer is 0.2 mm.

[0012] As a further description of the above technical solution:

[0013] The reinforcement layer includes an inner spiral compression-resistant belt, an annular reinforcement rib, a plurality of metal braided belts and an annular compression-resistant belt. A plurality of the metal braided belts are sleeved on the surface of the annular reinforcement rib, and a plurality of the metal braided belts are distributed in an annular shape at equal distances. The annular compression-resistant belt is located on the outer surface of the annular reinforcement rib, and the annular reinforcement rib, the plurality of metal braided belts and the annular compression-resistant belt are all embedded in the inner spiral compression-resistant belt.

[0014] As a further description of the above technical solution:

[0015] The inner spiral anti-compression belt is made of rubber material, and both sides of the inner side of the inner spiral anti-compression belt are chamfered. The inner spiral anti-compression belt is sleeved inside the outer spiral groove of the corrugated pipe.

[0016] As a further description of the above technical solution:

[0017] The annular reinforcing ribs and the annular compression-resistant belt are both made of steel wire, and the diameter of the inner spiral compression-resistant belt is larger than the diameter of the corrugated pipe body.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, the insulating layer is used to improve the wear resistance, waterproofness and corrosion resistance, the protective layer is used to improve the compressive strength and longitudinal tensile strength of the bellows body, the buffer layer is used to absorb and diffuse the external pressure on the bellows body, thereby preventing the pressure from directly acting on the bellows body and protecting the bellows body from being damaged by pressure, and the reinforcing layer is used to improve the compressive resistance, thereby further preventing the external force from squeezing the bellows body, thereby achieving the effect of improving the compressive strength and preventing corrosion.

[0020] 2. In the utility model, the insulating layer is made of polyethylene material, which has light weight, good insulation performance and chemical resistance, and can effectively prevent the corrugated pipe body from corrosion, thereby greatly improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of a spirally wound welded metal bellows with good compression resistance proposed by the utility model;

[0022] Figure 2 A schematic diagram of a three-dimensional explosion structure of a spirally wound welded metal bellows with good compression resistance proposed by the utility model;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of a buffer layer and a reinforcement layer of a spirally wound welded metal bellows with good compression resistance proposed by the utility model;

[0024] Figure 4 The utility model is a schematic diagram of a three-dimensional partial cross-section of the reinforcing layer of a spirally wound welded metal bellows with good compression resistance.

[0025] Legend:

[0026] 1. Bellows body; 2. Outer spiral groove of bellows; 3. Pressure-resistant layer; 4. Insulation layer; 5. Protective layer; 6. Buffer layer; 7. Reinforcement layer; 8. Inner spiral pressure-resistant belt; 9. Annular reinforcement ribs; 10. Metal braided belt; 11. Annular pressure-resistant belt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-4 The utility model provides an embodiment: a spirally wound welded metal bellows with good pressure resistance, comprising a bellows body 1 and a bellows outer spiral groove 2, a pressure-resistant layer 3 is arranged on the surface of the bellows body 1, the pressure-resistant layer 3 comprises an insulating layer 4, a protective layer 5, a buffer layer 6 and a reinforcing layer 7, the insulating layer 4 is made of polyethylene material, the thickness of the insulating layer 4 is 0.2 mm, the protective layer 5 is a metal woven mesh layer, the protective layer 5 is embedded in the insulating layer 4, the buffer layer 6 is a sponge-like strip composed of semi-conductive polyester non-woven fiber cloth, the thickness of the buffer layer 6 is 0.2 mm, the reinforcing layer 7 comprises an inner spiral pressure-resistant belt 8, annular reinforcement ribs 9, a plurality of metal braided belts 10 and annular pressure-resistant belts 11, the plurality of metal braided belts 10 are sleeved on the surface of the annular reinforcement ribs 9, and the plurality of metal braided belts 10 are distributed in annular equidistant manner.

[0029] Specifically, the insulating layer 4 is made of polyethylene material, which has good wear resistance and corrosion resistance, can effectively prevent the corrugated pipe body 1 from corrosion and improve its service life. The protective layer 5 is made of a metal woven mesh layer, which can increase the lateral tension of the corrugated pipe body 1 and prevent the corrugated pipe body 1 from shrinking for a long time and causing breakage. At the same time, it can also withstand the external pressure on the corrugated pipe body 1. The buffer layer 6 is made of a sponge-like strip composed of semi-conductive polyester non-woven fiber cloth, which can absorb the external pressure on the corrugated pipe body 1 and prevent the pressure from directly acting on the surface of the corrugated pipe body 1. The reinforcing layer 7 composed of an inner spiral pressure-resistant belt 8, annular reinforcement ribs 9, a plurality of metal braided belts 10 and annular pressure-resistant belts 11 can greatly improve the pressure resistance of the corrugated pipe body 1.

[0030] Reference Figure 2-4 The inner spiral anti-compression belt 8 is made of rubber material, and both sides of the inner side of the inner spiral anti-compression belt 8 are chamfered. The inner spiral anti-compression belt 8 is sleeved inside the outer spiral groove 2 of the corrugated pipe. The annular reinforcement rib 9 and the annular anti-compression belt 11 are both made of steel wire material. The diameter of the inner spiral anti-compression belt 8 is larger than the diameter of the corrugated pipe body 1.

[0031] Specifically, the inner spiral compression-resistant belt 8 made of rubber material has good resilience and compression resistance, and can effectively prevent the bellows body 1 from being deformed by force. The chamfers on both sides of the inner side of the inner spiral compression-resistant belt 8 can effectively improve the bending flexibility of the bellows body 1. The annular reinforcement ribs 9 and the annular compression-resistant belt 11 made of steel wire can effectively improve the compression resistance of the inner spiral compression-resistant belt 8.

[0032] Reference Figure 2-4 The insulating layer 4 is located on the outer surface of the pressure-resistant layer 3, the buffer layer 6 is located on the inner side of the protective layer 5, the reinforcement layer 7 is located on the inner side of the buffer layer 6, the annular pressure-resistant belt 11 is located on the outer surface of the annular reinforcement rib 9, and the annular reinforcement rib 9, several metal braided belts 10 and the annular pressure-resistant belt 11 are all embedded in the inner spiral pressure-resistant belt 8.

[0033] Specifically, by positioning the insulating layer 4 on the outer surface of the pressure-resistant layer 3, the wear resistance and corrosion resistance of the bellows body 1 during use can be effectively improved, thereby greatly improving its service life. By positioning the buffer layer 6 on the inner side of the protective layer 5, it is used to absorb and buffer the external force acting on the bellows body 1, thereby preventing the bellows body 1 from being directly deformed by pressure. By embedding the annular reinforcement ribs 9, a plurality of metal braided belts 10 and an annular pressure-resistant belt 11 inside the inner spiral pressure-resistant belt 8, the bearing pressure can be greatly increased, thereby improving the safety of the use of the bellows body 1.

[0034] Working principle: When in use, the insulating layer 4 is made of polyethylene material to prevent the corrugated pipe body 1 from directly contacting the friction generated by the object. When the corrugated pipe body 1 is subjected to external force, the insulating layer 4 made of polyethylene material first bears the force, and then transmits it to the protective layer 5 made of the metal woven mesh layer. The protective layer 5 with good elasticity and strength reduces part of the force, and then the buffer layer 6 absorbs and disperses part of the external pressure. The reinforcement layer 7 absorbs and disperses the remaining external pressure through the inner spiral pressure-resistant belt 8, the annular reinforcement ribs 9, a number of metal braided belts 10 and the annular pressure-resistant belt 11, so that the corrugated pipe body 1 has a better pressure-resistant effect.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spirally wound welded metal bellows with good pressure resistance, comprising a bellows body (1) and a bellows outer spiral groove (2), characterized in that: The surface of the corrugated pipe body (1) is provided with a pressure-resistant layer (3), and the pressure-resistant layer (3) comprises an insulating layer (4), a protective layer (5), a buffer layer (6) and a reinforcing layer (7), wherein the insulating layer (4) is located on the outer surface of the pressure-resistant layer (3), the buffer layer (6) is located on the inner side of the protective layer (5), and the reinforcing layer (7) is located on the inner side of the buffer layer (6).

2. A spirally wound welded metal bellows with good compression resistance according to claim 1, characterized in that: The insulating layer (4) is made of polyethylene material, and the thickness of the insulating layer (4) is 0.2 mm.

3. The spirally wound welded metal bellows with good compression resistance according to claim 1, characterized in that: The protective layer (5) is a metal woven mesh layer, and the protective layer (5) is embedded in the interior of the insulating layer (4).

4. The spirally wound welded metal bellows with good compression resistance according to claim 1, characterized in that: The buffer layer (6) is a sponge-like strip made of semi-conductive polyester non-woven fiber cloth, and the thickness of the buffer layer (6) is 0.2 mm.

5. The spirally wound welded metal bellows with good compression resistance according to claim 1, characterized in that: The reinforcement layer (7) comprises an inner spiral anti-compression belt (8), an annular reinforcement rib (9), a plurality of metal braided belts (10) and an annular anti-compression belt (11); the plurality of metal braided belts (10) are sleeved on the surface of the annular reinforcement rib (9); the plurality of metal braided belts (10) are distributed in an annular shape at equal distances; the annular anti-compression belt (11) is located on the outer surface of the annular reinforcement rib (9); the annular reinforcement rib (9), the plurality of metal braided belts (10) and the annular anti-compression belt (11) are all embedded in the inner spiral anti-compression belt (8).

6. The spirally wound welded metal bellows with good compression resistance according to claim 5, characterized in that: The inner spiral anti-compression belt (8) is made of rubber material, and both sides of the inner side of the inner spiral anti-compression belt (8) are chamfered. The inner spiral anti-compression belt (8) is sleeved inside the outer spiral groove (2) of the corrugated pipe.

7. The spirally wound welded metal bellows with good compression resistance according to claim 5, characterized in that: The annular reinforcing rib (9) and the annular anti-pressure belt (11) are both made of steel wire, and the diameter of the inner spiral anti-pressure belt (8) is greater than the diameter of the corrugated pipe body (1).

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