Connecting gasket suitable for small-bottom large-top span welding

Abstract

The connecting gasket comprises a base body, the base body is provided with a pair of clamping parts which are arranged at an included angle of 30 degrees to 70 degrees, the upper ends of the two clamping parts are inclined and folded upwards and then bent in a round chamfering mode to form inner flow guide parts, the ends, away from the clamping parts, of the inner flow guide parts are folded outwards to form bearing parts, and the bearing parts are connected with the clamping parts. One end, far away from the clamping part, of the bearing part is obliquely folded downwards to form an outer flow guide part; the clamping part is arranged on the periphery of the small-diameter steel bar in a clamping mode, and the bearing part abuts against the surface of the lower end of the large-diameter steel bar.

Description

Technical Field

[0001] The utility model relates to the technical field of electroslag pressure welding span welding construction, in particular to a connecting gasket suitable for welding with a smaller bottom and a larger top span. Background Art

[0002] Traditional vertical rebar connections, based on the load-bearing characteristics of concrete components, typically use a smaller-diameter upper rebar connected to a larger-diameter lower rebar. This allows the lower rebar to provide support and support when the upper and lower rebars melt. However, some joints use a larger-diameter upper rebar connected to a smaller-diameter lower rebar, resulting in poor weld quality.

[0003] Especially in construction projects with demanding roofing requirements, high strength and stiffness are required for the roofing layer, resulting in a prevalence of connections with smaller bottom and larger top spans. This often involves welding across three diameters of rebar. When the smaller diameter rebar at the bottom transitions to a larger diameter, slag and liquid metal are squeezed out during electroslag welding and the final weld. When the weld bead is formed, the smaller diameter of the lower rebar causes significant downward flow of liquid metal, resulting in significant weld bead defects. The large cross-span rebar, when welded using traditional welding machines and fixtures, often results in eccentricity and misalignment. Utility Model Content

[0004] In order to solve the above technical problems, the present invention provides a connection gasket suitable for welding with a small bottom and a large upper span. The present invention is implemented as follows:

[0005] A connection gasket suitable for welding with a smaller bottom and a larger top span, comprising a base having a pair of clamping portions arranged at an angle of 30° to 70°, wherein the upper ends of the two clamping portions are first folded upward and then chamfered to form an inner guide portion, an end of the inner guide portion away from the clamping portion is folded outward to form a supporting portion, and an end of the supporting portion away from the clamping portion is folded downward to form an outer guide portion;

[0006] The clamping portion is clamped on the outer periphery of the small-diameter steel bar and the supporting portion abuts against the lower end surface of the large-diameter steel bar.

[0007] As a further improvement, drainage grooves are further provided on the upper end surfaces of the supporting portion and the inner guide portion.

[0008] As a further improvement, the drainage groove is formed in a trend of first gradually contracting and then gradually expanding from the supporting portion to the guide portion, and the groove depth of the drainage groove gradually becomes shallower.

[0009] The beneficial effects of the present invention are:

[0010] 1. By setting a connecting gasket with an angle, the connecting gasket is set at the welding node position of the small-diameter steel bar and the large-diameter steel bar, so that the steel bar is placed at the inner corner position of the connecting gasket to form a clamp, the upper and lower steel bars have a high concentric alignment, and the welding process is stable and does not shake.

[0011] 2. Inner and outer guide parts are provided on the connection gasket, so that the upper large-diameter steel bars can be melted and cover the connection gasket. At the same time, the inclined inner and outer guide parts can form excellent weld laps, reducing the impact of defects caused by such span connections.

[0012] 3. A supporting portion is provided on the connection gasket to support the upper large-diameter steel bars and avoid unstable contact caused by too small a contact area during the alignment process.

[0013] 4. By setting the clamping part to 30-70 degrees, a small-angle connection gasket can be used for the construction of span welding with a large diameter difference. The small-angle connection gasket can extend the clamping part after clamping the small-diameter steel bar, which can better support the upper large-diameter steel bar; accordingly, for the span welding construction with a small diameter difference, a large-angle connection gasket can be used to reduce the extension length of the connection gasket and avoid the welding weld being too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model.

[0015] Figure 2 This is a partial enlarged view of the drainage groove portion of one embodiment of the present utility model.

[0016] Figure 3 This is a partial enlarged view of the drainage groove portion of another embodiment of the present utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0018] A connection gasket suitable for welding with a smaller bottom and a larger top span, comprising a base having a pair of clamping portions 1 arranged at an angle of 30° to 70°. The upper ends of the two clamping portions 1 are first folded upward and then chamfered to form an inner guide portion 2. The end of the inner guide portion 2 away from the clamping portion 1 is folded outward to form a supporting portion 3. The end of the supporting portion 3 away from the clamping portion 1 is folded downward to form an outer guide portion 4.

[0019] The clamping portion 1 is clamped on the outer periphery of the small-diameter steel bar and the supporting portion 3 abuts against the lower end surface of the large-diameter steel bar.

[0020] As a further improvement, drainage grooves 5 are further provided on the upper end surfaces of the supporting portion 3 and the inner guide portion 2 .

[0021] As a further improvement, the drainage groove 5 is formed in a manner that gradually contracts and then expands from the supporting portion 3 to the drainage portion, and the groove depth of the drainage groove 5 gradually becomes shallower. In other words, the two ends of the drainage groove 5 form a bell mouth to guide the molten iron and avoid weld defects.

[0022] In order to avoid defects caused by deformation of the connection gasket during welding, in the present invention, the melting point of the manufacturing material of the connection gasket is higher than the melting point of the two interconnected span steel bars.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A connection gasket suitable for welding with a small bottom and a large top span, characterized in that: It comprises a base body, wherein the base body has a pair of clamping parts arranged at an angle of 30° to 70°, the upper ends of the two clamping parts are first folded upward obliquely and then folded with round chamfers to form an inner guide part, one end of the inner guide part away from the clamping part is folded outwardly to form a supporting part, and one end of the supporting part away from the clamping part is folded downward obliquely to form an outer guide part; The clamping portion is clamped on the outer periphery of the small-diameter steel bar and the supporting portion abuts against the lower end surface of the large-diameter steel bar.

2. A connection gasket suitable for welding with a small bottom and a large top span as claimed in claim 1, characterized in that: The upper end surfaces of the supporting portion and the inner guide portion are also provided with drainage grooves.

3. A connection gasket suitable for welding with a small bottom and a large top span as claimed in claim 2, characterized in that: The drainage groove is formed in a trend of gradually contracting and then gradually expanding from the supporting portion to the guide portion, and the groove depth of the drainage groove gradually becomes shallower.

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