Stainless steel corrugated hose with snap ring type threaded connector for connection of gas appliance

Abstract

The utility model discloses a stainless steel corrugated hose for connecting a snap ring type threaded connector gas appliance, which comprises a corrugated pipe and a nut, a convex ring is arranged at the rear end of the nut, a snap ring matched with the convex ring is sleeved at the front end of a corrugated pipe body, the stainless steel corrugated hose further comprises a flange steel sleeve, and the flange steel sleeve is sleeved outside a coating layer. The flange type steel sleeve, the coating layer and the corrugated pipe body are fixedly connected through buckling and pressing, the front end of the flange type steel sleeve is provided with a turned-over edge matched with the nut, and the turned-over edge is located between the clamping ring and the protruding ring. The flange and the steel sleeve are designed into the integrated flange steel sleeve, so that the bending performance of the root of the corrugated pipe is improved, and the situation that the corrugated pipe body is exposed when the root is bent is avoided; welding procedures are reduced, so that the risk of air leakage is reduced, and the sealing performance of the joint of the corrugated hose is improved; the flange and the clamping ring are both in axial limiting fit with the convex ring, so that the drawing force at the joint is enhanced, and the use safety is greatly improved; the number of parts is reduced, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a stainless steel corrugated hose for connecting gas appliances with a clamping ring type threaded interface. Background Art

[0002] Stainless steel corrugated hoses are used when connecting gas pipelines to gas valves or gas stoves. The existing stainless steel corrugated hoses are composite pipes with a stainless steel corrugated hose body inside and a flame-retardant PVC hose (coating) outside. The connection requires good sealing and firmness. Figure 1 Generally, the bellows body 1' is connected to one end of the flange 3' by welding, and the other end of the flange 3' is provided with a flange flange 31', and the flange flange 31' forms an axial limit fit with the convex ring 21' of the nut 2'. Since the bellows body 1' is welded to the flange 3', this connection method makes it inevitable that the bellows body 1' is exposed between the PVC hose (coating) 11' and the flange 3'. To avoid this situation, the industry generally uses a steel sleeve 4' to further protect the stainless steel corrugated hose to prevent oil, dust, etc. from entering the stainless steel corrugated hose, that is, a steel sleeve 4' is additionally provided at the end of the flange 3', and the two are split designs. However, the defects of the above-mentioned existing stainless steel corrugated hose connection structure are: 1. Since the bellows body 1' and the flange 3' are welded together, there is a risk of air leakage at the annular seam welding point between the two; 2. The axial pulling force is only provided by the flange flange 31' and the convex ring 21' of the nut 2', resulting in a low pulling force; 3. Since the flange 3' and the steel sleeve 4' need to be set separately, the number of required parts is large, the structure is complex, and the manufacturing cost is high.

[0003] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide a stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances in view of the defects and shortcomings of the prior art. The utility model combines the flange and the steel sleeve into an integrated flange-type steel sleeve, thereby improving the root bending performance of the bellows, avoiding the situation where the bellows body is exposed when the root is bent, improving the connection sealing at the bellows joint, enhancing the pulling force at the connection, greatly improving the safety of use, and at the same time, reducing the number of parts, making the structure simple and the manufacturing cost low.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A stainless steel corrugated hose for connecting gas appliances with a clamping ring threaded interface, comprising a bellows and a nut, wherein the bellows comprises a bellows body and a coating layer covering the outside of the bellows body, the nut is sleeved on the front end of the bellows body, the rear end of the nut is provided with a convex ring, the front end of the bellows body is sleeved with a clamping ring matching the convex ring, and also comprises a flange-type steel sleeve, the flange-type steel sleeve is sleeved on the outside of the coating layer, and the flange-type steel sleeve, the coating layer and the bellows body are fixedly connected by buckling, and the front end of the flange-type steel sleeve is provided with a flange matching the nut, and the flange is located between the clamping ring and the convex ring.

[0007] Furthermore, a flattened portion is provided at the end of the bellows body, and the clamping ring is axially limitedly matched with the flattened portion.

[0008] Furthermore, a sealing ring is arranged inside the nut and abuts against the front end of the bellows body.

[0009] Furthermore, the sealing ring is provided with an annular groove cooperating with the flattened portion.

[0010] Furthermore, circular chamfers are provided at both ends of the sealing ring.

[0011] Furthermore, the clamping ring is composed of two half clamping rings integrally connected at the two ends, and a V-shaped notch is provided at the connection between the two half clamping rings, so that the clamping ring is compressed to form a full circle during installation.

[0012] Furthermore, an annular groove for installing a sealing ring is provided inside the nut.

[0013] Furthermore, the clamping ring is made of metal.

[0014] Furthermore, the sealing ring is made of rubber material.

[0015] After adopting the above structure, the beneficial effects of the utility model are as follows: the utility model described in the utility model is a stainless steel corrugated hose for connecting gas appliances with a clamping ring type threaded interface, including a bellows and a nut, the bellows including a bellows body and a coating layer coated on the outside of the bellows body, the nut is sleeved on the front end of the bellows body, the rear end of the nut is provided with a convex ring, the front end of the bellows body is sleeved with a clamping ring that cooperates with the convex ring, and also includes a flange-type steel sleeve, the flange-type steel sleeve is sleeved on the outside of the coating layer, and the flange-type steel sleeve, the coating layer and the bellows body are fixedly connected by buckling, and the front end of the flange-type steel sleeve is provided with a flange that cooperates with the nut, and the flange is located between the clamping ring and the convex ring. The flange and the steel sleeve are designed as an integrated flange-type steel sleeve, which improves the bending performance of the root of the bellows and avoids the exposure of the bellows body when the root is bent; the integrated flange-type steel sleeve reduces the welding process, thereby reducing the risk of air leakage and improving the connection sealing at the joint of the stainless steel corrugated hose; the flange and the clamping ring both form an axial limit fit with the convex ring, which enhances the pulling force of the connection and greatly improves the safety of use; at the same time, the number of parts is reduced, making the structure simple and the manufacturing cost low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a stainless steel corrugated hose in the prior art;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 3 The utility model Figure 2 A schematic diagram of the structure at A;

[0020] Figure 4 It is a cross-sectional view of the steel sleeve of the utility model (before stamping);

[0021] Figure 5 It is a cross-sectional view of the steel sleeve of the utility model (after stamping);

[0022] Figure 6 It is a structural schematic diagram of the clamping ring of the utility model;

[0023] Figure 7 It is a cross-sectional view of the nut of the utility model;

[0024] Figure 8 It is a cross-sectional view of the sealing ring of the utility model.

[0025] Figures 1 to 8 The bid number is:

[0026] 1. Bellows; 11. Bellows body; 111. Flattened part; 12. Coating; 2. Nut; 21. Protruding ring; 22. Annular groove; 3. Snap ring; 31. Half snap ring; 32. V-shaped notch; 4. Flange steel sleeve; 41. Flanged edge; 42. Flared part; 5. Sealing ring; 51. Annular groove; 52. Circular chamfer; 1', Bellows body; 11', PVC hose (coating); 2', Nut; 21', Protruding ring; 3', Flange; 31', Flange flanging; 4', Steel sleeve. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly defined and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are only for illustrative purposes and do not represent the only implementation method.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] like Figures 1 to 8As shown, a stainless steel corrugated hose for connecting gas appliances with a clamping ring threaded interface includes a bellows 1 and a nut 2. The bellows 1 includes a bellows body 11 and a coating layer 12 coated on the outside of the bellows body 11. The nut 2 is sleeved on the front end of the bellows body 11. The rear end of the nut 2 is provided with a convex ring 21. The front end of the bellows body 11 is sleeved with a clamping ring 3 matched with the convex ring 21. The bellows body 11 also includes a flange steel sleeve 4. The flange steel sleeve 4 is sleeved on the outside of the coating layer 12, and the flange steel sleeve 4, the coating layer 12 and the bellows body 11 are fixedly connected by buckling. The front end of the flange steel sleeve 4 is provided with a flange 41 matched with the nut 2, and the flange 41 is located between the clamping ring 3 and the convex ring 21. The nut 2 is provided with an annular groove 22 for installing a sealing ring 5.

[0035] Based on the above embodiments, the utility model aims to solve the problem of providing a stainless steel corrugated hose for connecting gas appliances with a clamping ring type threaded interface, comprising a bellows 1 and a nut 2, wherein the bellows 1 comprises a bellows body 11 and a coating layer 12 coated on the outside of the bellows body 11, the nut 2 is sleeved on the front end of the bellows body 11, and the rear end of the nut 2 is provided with a convex ring 21, the front end of the bellows body 11 is sleeved with a clamping ring 3 that cooperates with the convex ring 21, and also comprises a flange-type steel sleeve 4, the flange-type steel sleeve 4 is sleeved on the outside of the coating layer 12, and the flange-type steel sleeve 4, the coating layer 12 and the bellows body 11 are fixedly connected by buckling, and the front end of the flange-type steel sleeve 4 is provided with a flange 41 that cooperates with the nut 2, and the flange 41 is located between the clamping ring 3 and the convex ring 21. The flange and the steel sleeve are designed as an integrated flange steel sleeve 4, which improves the root bending performance of the bellows 1 and avoids the exposure of the bellows body 11 when the root is bent; the integrated flange steel sleeve 4 reduces the welding process, thereby reducing the risk of air leakage and improving the connection sealing at the stainless steel corrugated hose joint; the flange 41 and the clamping ring 3 both form an axial limit fit with the convex ring 21, which enhances the pulling force at the connection and greatly improves the safety of use; at the same time, the number of parts is reduced, making the structure simple and the manufacturing cost low. In this embodiment, Figure 3 As shown, the annular groove 22 is designed to prevent the seal ring 5 from shifting or falling off. The convex ring 21 is designed to form a limited fit with the flange 41 and the clamping ring 3 to prevent the bellows body 11 from being pulled out. In a further embodiment, the rear end of the flange steel sleeve 4 is provided with a flared portion 42. In this embodiment, as shown in FIG. Figure 2 , Figure 4 , Figure 5As shown, the design of the flared portion 42 facilitates the insertion of the bellows body 11 into the flange steel sleeve 4, and after the insertion, the flared portion 42 is stamped and deformed, so that the flange steel sleeve 4 presses the coating layer 12 and the bellows body 11, thereby making the flange steel sleeve 4, the coating layer 12 and the bellows body 11 tightly matched. The design of the flared portion 42 makes the outer wall of the flange steel sleeve 4 after stamping and deformation be straight barrel-shaped without forming steps.

[0036] As another preferred solution of the utility model, the end of the bellows body 11 is provided with a flattened portion 111, and the clamping ring 3 is axially limitedly matched with the flattened portion 111. Figure 3 As shown, the flattened portion 111 effectively enlarges the flange surface, and the clamping ring 3 is clamped between the flattened portion 111 and the convex ring 21, thereby increasing the contact area between the bellows body 11 and the convex ring 21 of the nut 2, increasing the pull-out force at the connection between the bellows body 11 and the nut 2, and effectively preventing the bellows body 11 from coming out. In this embodiment, the flattened portion 111 includes at least one complete wave crest. In a further embodiment, the flattened portion 111 includes two complete wave crests, so that the rigidity of the flattened portion 111 is stronger, and the pull-out force at the connection between the bellows body 11 and the nut 2 is further increased.

[0037] As another preferred embodiment of the present invention, a sealing ring 5 is provided in the nut 2 to abut against the front end of the bellows body 11. The sealing ring 5 is provided with an annular groove 51 that matches the flattened portion 111. Both ends of the sealing ring 5 are provided with circular chamfers 52. The sealing ring 5 is made of rubber. In this embodiment, Figure 8 As shown, the sealing ring 5 is made of a long-life rubber material, which can make the sealing ring 5 have a long service life, and the rubber has a deformation property, which can better play a sealing role. The sealing ring 5 is provided with an annular groove 51 that cooperates with the flattened portion 111. The sealing ring 5 forms a close fit with the end surface of the flattened portion 111, which greatly improves the effectiveness of the seal. The two ends of the sealing ring 5 are provided with circular chamfers 52, and the design of the circular chamfers 52 facilitates the installation of the sealing ring 5 into the annular groove 22 of the nut 2.

[0038] It is another preferred embodiment of the present invention, wherein the clamping ring 3 is composed of two half-clamping rings 31 integrally connected at the two ends, and a V-shaped notch 32 is provided at the connection between the two half-clamping rings 31, and the clamping ring 3 is compressed to form a whole circle during installation. The clamping ring 3 is made of metal. The conventional clamping ring 3 in the prior art is generally composed of two split half-clamping rings 31 spliced ​​together. During assembly, the two need to be aligned and spliced, and clamped at the crest or trough. However, since the clamping ring 3 is usually designed to be relatively small, it is very inconvenient to operate, and it is also easy to cause the clamping ring 3 to be lost during the installation process, making it impossible to install and use the stainless steel corrugated hose normally. In this embodiment, if Figure 6 As shown, the snap ring 3 is composed of two half snap rings 31 integrally connected at the two ends. The integrated setting can effectively prevent the loss of the half snap ring 31, and also makes the installation operation more convenient. During installation, the two half snap rings 31 are pressed together and closed to form a full circle through the V-shaped notch 32 at the connection. After forming a full circle, the snap ring 3 is tightly clamped at the trough of the bellows body 11, increasing the pulling force at the connection between the bellows body 11 and the nut 2. The snap ring 3 is made of metal material, especially copper and stainless steel. Copper and stainless steel have the characteristics of strong corrosion resistance, and their hardness is higher than that of plastic materials, which can further increase the pulling force between the bellows body 11 and the nut 2.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A stainless steel corrugated hose for connecting gas appliances with a clamping ring threaded interface, comprising a bellows (1) and a nut (2), wherein the bellows (1) comprises a bellows body (11) and a coating layer (12) covering the outside of the bellows body (11), the nut (2) is sleeved on the front end of the bellows body (11), a convex ring (21) is provided at the rear end of the nut (2), and a clamping ring (3) matching the convex ring (21) is sleeved on the front end of the bellows body (11), characterized in that: It also comprises a flange-shaped steel sleeve (4), the flange-shaped steel sleeve (4) being sleeved on the outside of the coating layer (12), and the flange-shaped steel sleeve (4), the coating layer (12) and the bellows body (11) being fixedly connected by buckling, and the front end of the flange-shaped steel sleeve (4) is provided with a flange (41) cooperating with the nut (2), and the flange (41) is located between the clamping ring (3) and the convex ring (21).

2. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 1, characterized in that: A flattened portion (111) is provided at the end of the bellows body (11), and the clamping ring (3) is axially limitedly engaged with the flattened portion (111).

3. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 2, characterized in that: A sealing ring (5) is arranged inside the nut (2) and abuts against the front end of the bellows body (11).

4. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 3, characterized in that: The sealing ring (5) is provided with an annular groove (51) that cooperates with the flattened portion (111).

5. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 3 or 4, characterized in that: Circular chamfers (52) are provided at both ends of the sealing ring (5).

6. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 1, characterized in that: The clamping ring (3) is composed of two half clamping rings (31) whose ends are integrally connected, and a V-shaped notch (32) is provided at the connection between the two half clamping rings (31). When installed, the clamping ring (3) is compressed to form a full circle.

7. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 3 or 4, characterized in that: An annular groove (22) for mounting a sealing ring (5) is provided inside the nut (2).

8. The stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 1, characterized in that: The clamping ring (3) is made of metal material.

9. A stainless steel corrugated hose with a clamping ring type threaded interface for connecting gas appliances according to claim 3 or 4, characterized in that: The sealing ring (5) is made of rubber material.

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