Flexible metal hose protection device

Abstract

The utility model relates to a deflection-resistant metal hose protection device which comprises a hose end, a fixing ring and a curved surface protection sleeve. The fixing ring is matched with a hard pipe outside the end of the hose, the curved-surface protecting sleeve is formed by splicing two half symmetrical structures, the curvature radius R of an inner cavity of the curved-surface protecting sleeve meets the formula of 0.2, D is the nominal diameter of the metal hose, K is the material bending coefficient and K is larger than or equal to 5 and smaller than or equal to 10, the deflection resistance of the metal hose can be improved, and bending damage can be relieved.

Description

Technical Field

[0001] This utility model relates to a flexible metal hose protective device, belonging to the field of non-ferrous metallurgical technology. Background Technology

[0002] For metal hoses used for cooling water in rotating metallurgical furnaces, since the furnace is a rotating device at one end of the hose and the medium in the metal hose is cooling water, the hose connection end is subjected to the combined effects of the water's own weight and the equipment's rotation during the furnace's large-angle rotation. This causes the hose connection section to bend, and the curved surfaces of the hose are very prone to damage and leakage. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the present invention provides a flexural resistance metal hose protection device, which can improve the flexural resistance of metal hoses and reduce bending damage.

[0004] The technical solution of this utility model is as follows:

[0005] A flexible metal hose protective device includes a hose end, a fixing ring, and a curved protective sleeve. The fixing ring is fitted with an external rigid tube of the hose end. The curved protective sleeve is formed by splicing two symmetrical halves. The inner radius of curvature R of the curved protective sleeve satisfies: R≥K*D*0.2, where D is the nominal diameter of the metal hose, K is the bending coefficient of the material, and 5≤K≤10.

[0006] The effective length L of the curved protective sleeve satisfies: L=2πR×0.25, covering the entire range of motion of the curved section of the hose.

[0007] The fixing ring and the curved protective sleeve are connected by two bolt holes, and the fixing ring and the curved protective sleeve are fastened by bolts.

[0008] The two semi-rings of the curved protective sleeve are fastened together by connecting lugs and bolts on the side.

[0009] The curved protective sleeve adopts a segmented stainless steel corrugated plate structure, and adjacent stainless steel corrugated plates are connected by a hinge shaft to form a continuous curved guide surface.

[0010] This utility model has the following beneficial effects:

[0011] This utility model effectively limits the bending range of the metal hose by setting a fixing ring and a split curved protective sleeve that match the metal hose, combined with the precise design of the inner cavity curvature radius; it adopts a segmented corrugated plate and hinge shaft structure to form a continuous guide surface to disperse local stress; and it uses a multi-stage detachable structure with bolted connection to ensure installation stability and facilitate maintenance and repair, thereby achieving anti-bending protection for the metal hose under dynamic working conditions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] The reference numerals in the figure are as follows:

[0014] 1. Hose tip; 2. Retaining ring; 3. Curved protective sleeve. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figure 1 The utility model provides a technical solution:

[0017] A flexible metal hose protection device includes a hose end 1, a fixing ring 2, and a curved protective sleeve 3. The fixing ring 2 is fitted with an external rigid tube for the hose end 1. The curved protective sleeve 3 is formed by splicing two symmetrical halves. The radius of curvature R of the inner cavity of the curved protective sleeve 3, i.e., the bending limit of the metal hose, usually refers to its minimum allowable bending radius. The minimum radius that the hose can bend without permanent deformation or damage satisfies: R≥K*D*0.2, where D is the nominal diameter of the metal hose, K is the material bending coefficient and 5≤K≤10, and 0.2 is a safety margin. The fixing ring 2 is designed for metal hoses of different nominal diameters. The bending channel of the curved protective sleeve 3 is designed according to the bending limit of metal hoses of different nominal diameters. The hose bends evenly and gently along the curved protective sleeve 3 within the bending channel, which can effectively limit the occurrence of extreme bending and effectively reduce the occurrence of extreme bending of metal hoses used in the connection of rotating equipment, thereby improving the service life of the metal hose.

[0018] The effective length L of the curved protective sleeve 3 satisfies: L=2πR×0.25, covering the entire range of motion of the bending section of the hose. The effective length of the curved protective sleeve 3 is dynamically correlated with the radius of curvature, realizing the precise matching between the bending trajectory of the metal hose and the guide surface of the curved protective sleeve 3, ensuring that the metal hose can still be completely within the constraint range of the protective sleeve when rotating at the maximum tilt angle.

[0019] There are two bolt holes at the connection between the fixing ring 2 and the curved protective sleeve 3, and the fixing ring 2 and the curved protective sleeve 3 are fastened by bolts.

[0020] The two semi-rings of the curved protective sleeve 3 are fastened together by connecting ear plates and bolts set on the side.

[0021] The curved protective sleeve 3 adopts a segmented stainless steel corrugated plate structure. Adjacent stainless steel corrugated plates are connected by a hinge shaft to form a continuous bending guide surface. This forms a multi-degree-of-freedom bending guide surface, realizing synchronous deformation of the curved protective sleeve 3 and the hose dynamic bending, dispersing concentrated stress to each corrugated plate unit, and reducing the risk of fatigue cracking of the curved protective sleeve 3 itself.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flexible metal hose protective device, comprising a hose end (1), characterized in that: It also includes a fixing ring (2) and a curved protective sleeve (3); the fixing ring (2) is matched with the outer rigid tube of the hose end (1), and the curved protective sleeve (3) is formed by splicing two symmetrical structures. The inner radius of curvature R of the curved protective sleeve (3) satisfies: R≥K*D*0.2, where D is the nominal diameter of the metal hose, K is the material bending coefficient and 5≤K≤10.

2. The flexible metal hose protective device as described in claim 1, characterized in that: The effective length L of the curved protective sleeve (3) satisfies: L=2πR×0.25, covering the entire range of motion of the curved section of the hose.

3. The flexible metal hose protective device as described in claim 1, characterized in that: There are two bolt holes at the connection between the fixing ring (2) and the curved protective sleeve (3), and the fixing ring (2) and the curved protective sleeve (3) are fastened by bolts.

4. The flexible metal hose protective device as described in claim 1, characterized in that: The two semi-rings of the curved protective sleeve (3) are fastened together by connecting ear plates and bolts set on the side.

5. The flexible metal hose protective device as described in claim 1, characterized in that: The curved protective sleeve (3) adopts a segmented stainless steel corrugated plate structure, and adjacent stainless steel corrugated plates are connected by a hinge shaft to form a continuous curved guide surface.

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