Reducing welded pipe for valve

Abstract

The utility model discloses a reducing welding pipe for a valve, which comprises a first pipe body and a second pipe body, and a convex welding part is formed on the butt joint end face of the first pipe body; the butt joint end face of the second pipe body is provided with a groove corresponding to the welding part, and when the first pipe body and the second pipe body are in butt joint, at least one part of the welding part is embedded into the groove. The first pipe body and the second pipe body are in butt joint, the welding part is embedded into the groove, and then the first pipe body and the second pipe body are welded, so that the contact area between the first pipe body and the second pipe body after welding is larger, the overall welding strength is improved, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of welded pipes, in particular to a variable-diameter welded pipe used for valves. Background Art

[0002] Welded pipes are mainly used to connect with opening and closing devices such as valves to transport fluids. With the development of various welded pipes, the shapes of welded pipes used in different areas are becoming more and more complex. In related technologies, existing variable-diameter welded pipes usually need to be welded by pipes of different calibers. However, due to the different calibers, the overall strength after welding is not high, which affects the service life. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a variable diameter welded pipe for a valve, comprising:

[0004] A first tube body, wherein a protruding welding portion is formed on a butt end surface of the first tube body;

[0005] The second tube body has a groove on its butt joint end surface corresponding to the welding portion, and when the first tube body and the second tube body are butt jointed, at least a portion of the welding portion is embedded in the groove.

[0006] Preferably, at least two welding gaps are formed between the first tube body and the second tube body, and the at least two welding gaps are located on both sides of the welding portion along the radial direction.

[0007] Preferably, the edge of the groove is formed as an inclined surface and is opposite to two sides of the welding portion.

[0008] Preferably, the cross section of the welding portion is formed into a triangle.

[0009] Preferably, the height of the welding portion is 4.6-6.2 mm.

[0010] Preferably, the spacing of the welding gaps is 2.3 mm-4.7 mm.

[0011] Preferably, the first tube body has a first transition arc segment, the second tube body has a second transition arc segment, the first transition arc segment and the second transition arc segment are welded through the welding gap, and the diameter gradually decreases from the first transition arc segment to the second transition arc segment.

[0012] Preferably, the end of the first tube body away from the first transition arc segment has a flange, and the flange is used to be connected to a valve.

[0013] The above solution of the utility model includes at least the following beneficial effects:

[0014] The variable diameter welded pipe for a valve provided by the utility model connects a first pipe body and a second pipe body, embeds a welding portion into a groove, and then welds the first pipe body and the second pipe body, so that the contact area between the first pipe body and the second pipe body is larger after welding, the overall welding strength is improved, and the service life is longer.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a variable diameter welded pipe for a valve provided in an embodiment of the utility model;

[0018] Figure 2 It is a partial cross-sectional view of a variable diameter welded pipe for a valve provided in an embodiment of the utility model;

[0019] Figure 3 yes Figure 2 An enlarged view of section A is shown;

[0020] Figure 4 It is a structural schematic diagram of the first tube body provided in an embodiment of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the second tube body provided in an embodiment of the utility model;

[0022] Description of Figure Numbers:

[0023] 10. First tube body; 101. Welding portion; 102. First transition arc segment; 103. Flange; 20. Second tube body; 201. Groove; 202. Inclined surface; 203. Second transition arc segment; P10. Welding gap.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The variable diameter welded pipe for valves according to the embodiment of the utility model will be described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1 to 5 As shown, the reducer welded pipe for a valve provided in the embodiment of the utility model comprises: a first pipe body 10 and a second pipe body 20, wherein a protruding welding portion 101 is formed on the butt joint end surface of the first pipe body 10; a groove 201 corresponding to the welding portion 101 is provided on the butt joint end surface of the second pipe body 20, and when the first pipe body 10 and the second pipe body 20 are butt jointed, at least a portion of the welding portion 101 is embedded in the groove 201.

[0032] The reducer welded pipe for a valve provided by the utility model is achieved by butting the first pipe body 10 and the second pipe body 20, embedding the welding portion 101 into the groove 201, and then welding the first pipe body 10 and the second pipe body 20. This makes the contact area between the first pipe body 10 and the second pipe body 20 larger after welding, thereby improving the overall welding strength and extending the service life.

[0033] Specifically, at least two welding gaps P10 are formed between the first tube body 10 and the second tube body 20 , and the at least two welding gaps P10 are located on both sides of the welding portion 101 along the radial direction.

[0034] In this embodiment, when welding is performed between the first tube body 10 and the second tube body 20, since the welding portion 101 is embedded in the groove 201, a welding gap P10 is formed between the first tube body 10 and the second tube body 20, and then the welding gaps P10 on both sides of the welding portion 101 can be welded, so that the welding rod can be melted into the welding gap P10 and wrap the welding portion 101 inside, so that the welding area between the first tube body 10 and the second tube body 20 is larger and the welding strength is higher.

[0035] Reference Figure 3As shown, the edge of the groove 201 is formed as an inclined surface 202, which is opposite to the two sides of the welding part 101. During welding, the inclined surface 202 allows the partially melted welding rod to be welded into the groove 201, so that the groove 201 and the welding part 101 can be welded and fixed more stably, with better wrapping and higher welding strength.

[0036] It can be understood that the cross section of the welding part 101 is formed into a triangle. Among them, the groove 201 can be set corresponding to the welding part 101, and the depth of the groove 201 is less than the height of the welding part 101. Therefore, the height of the welding part 101 is 4.6-6.2mm. After the first tube body 10 and the second tube body 20 are butt-jointed, part of the welding part 101 is located outside the groove 201, so that the above-mentioned welding gap P10 can be formed on the inner side and the outer side of the welded pipe respectively. During welding, the inner side and the outer side can be welded simultaneously by the welding equipment, ensuring a better welding effect and improving the welding strength.

[0037] Optionally, the spacing of the welding gap P10 is 2.3 mm-4.7 mm.

[0038] Furthermore, the first tube body 10 has a first transition arc segment 102, the second tube body 20 has a second transition arc segment 203, the first transition arc segment 102 and the second transition arc segment 203 are welded through a welding gap P10, and the diameter gradually decreases from the first transition arc segment to the second transition arc segment 203. Among them, the first transition arc segment 102 and the second transition arc segment 203 are connected, so that the first tube body 10 and the second tube body 20 can be welded to form a welded pipe with a reduced diameter, thereby ensuring that the pressure of the pipeline branch is more stable when conveying fluid or gas.

[0039] Optionally, the end of the first pipe body 10 away from the first transition arc section 102 has a flange 103, and the flange 103 is used to connect with the valve. The valve can be fixed to the flange 103 by bolts or the like, so that the entire welded pipe can be connected to the valve, and the overall sealing effect is better.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A variable diameter welded pipe for a valve, characterized in that: include: A first tube body, wherein a protruding welding portion is formed on a butt end surface of the first tube body; The second tube body has a groove on its butt joint end surface corresponding to the welding portion, and when the first tube body and the second tube body are butt jointed, at least a portion of the welding portion is embedded in the groove.

2. The reducer welded pipe for valves according to claim 1, characterized in that: At least two sections of welding gaps are formed between the first tube body and the second tube body, and the at least two sections of the welding gaps are located on both sides of the welding portion along the radial direction.

3. The reducer welded pipe for valves according to claim 1, characterized in that: The edge of the groove is formed as an inclined surface and is opposite to two sides of the welding portion.

4. The reducer welded pipe for valves according to claim 1, characterized in that: The cross section of the welding portion is formed in a triangular shape.

5. The reducer welded pipe for valves according to claim 1, characterized in that: The height of the welding portion is 4.6-6.2 mm.

6. The reducer welded pipe for valves according to claim 2, characterized in that: The spacing of the welding gap is 2.3mm-4.7mm.

7. The reducer welded pipe for valves according to claim 6, characterized in that: The first tube body has a first transition arc segment, the second tube body has a second transition arc segment, the first transition arc segment and the second transition arc segment are welded through the welding gap, and the diameter gradually decreases from the first transition arc segment to the second transition arc segment.

8. The reducer welded pipe for valves according to claim 7, characterized in that: The end of the first tube body away from the first transition arc segment has a flange, and the flange is used to be connected to a valve.

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