CN202500589U - Ladder beam for anchor rod support - Google Patents

Abstract

The utility model relates to a ladder beam for anchor rod support. The ladder beam is formed through welding reinforcement of two paratactic beam racks and a plurality of connecting pieces which are sleeved on the beam racks and in annular contact with the beam racks. Each connecting piece is an integral structure which has a straight middle part and two rings arranged at two ends of the straight middle part. A plurality of anchor rod holes constituted by the beam racks and the connecting pieces together are arranged in the middle of the beam racks. By improving the shape of the connecting pieces and the contacting mode of the connecting pieces and the beam racks, defects that conventional ladder beam structures are easy to crack at welds and that the welding operation is inconvenient are overcome. The improved ladder beam is good in overall performance and high in tensile strength and anti-deformability. The improved ladder beam is uneasy to crack at welds and convenient for the welding operation. The improved ladder beam can be widely applied to the mine working surrounding rock control.

Description

Ladder beam for bolt support

technical field

The utility model relates to the field of mine roadway support materials, in particular to a welded ladder beam for bolt support. the

Background technique

Bolt support is widely used in geotechnical and mining engineering because of its remarkable technical and economic effects. In projects using bolt support, most ladder beams are used as auxiliary components to restrain the surrounding rock between the bolts and improve the bearing capacity of the surrounding rock itself. However, the existing ladder girders are generally welded by the girder frame and several linear connectors on the inside of the girder frame. The tensile strength and deformation resistance are low. When the ladder beam is subjected to a large force, the welding point is easy to crack, which affects the overall effect of the bolt support. the

Contents of the invention

The purpose of this utility model is to solve the deficiency of the contact form between the current ladder beam beam frame and the connecting bar, and provide a new type of ladder beam for bolt support by improving the shape of the connecting bar and its contact form with the beam frame , to enhance the tensile strength and deformation resistance of the ladder beam structure, while reducing the difficulty of operation during welding. the

The utility model is realized through the following technical solutions: a ladder beam supported by bolts for mining is composed of two parallel beam frames (1) and several connectors (2) through welding, and the connectors (2) are made into It has a linear shape in the middle and a ring at both ends. The section of the ring hole matches the section of the beam frame and is slightly larger than the section of the beam frame. The connecting piece (2) is sleeved on the beam frame (1) through the ring holes at both ends. , the beam frame and the connecting piece form an annular contact and are welded and reinforced to form a welding line (3), and two adjacent connecting pieces and the beam frame jointly form an anchor hole (4). The section of beam frame (1) described in the utility model can be circular, also can be rectangle; Part (2) is made of steel. the

The utility model improves the form of the connecting piece so that the connecting piece and the beam frame form a circular contact and are welded and reinforced, which overcomes the deficiency of point contact welding between the existing ladder beam frame and the connecting piece. The improved ladder beam has the following characteristics: the connector is an integral structure, welded with the beam frame in a circular contact form, the welding area is large; the tensile strength and deformation resistance are large, it is not easy to crack at the weld, and the overall performance is good; the connector set On the beam frame, the welding operation is convenient. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Fig. 2 is a schematic cross-sectional structure diagram of the connector of the present invention. the

Fig. 3 is a schematic cross-sectional structure diagram of the utility model. the

Detailed ways

The embodiment shown in Figures 1 to 3 is a ladder beam for bolt support, the connecting piece (2) is sleeved on the beam frame (1), and the cross section of the ring holes at both ends of the connecting piece (2) is larger than the cross section of the beam frame Slightly larger to ensure tight contact between the beam frame and the connector, the beam frame and the connector form a circular contact, and form a welding line (3) by welding, the beam frame (1) and the connector (2) together form the anchor hole (4) . When bolt support is adopted, the bolt is anchored into the surrounding rock through the bolt hole (4), and the bolt and the ladder beam jointly support the surrounding rock. the

Claims (5)

1. A bolt support ladder beam is characterized in that: said ladder beam is formed by welding by two parallel beam frames (1) and some connectors (2). 2. The ladder beam according to claim 1, characterized in that: the cross section of the beam frame (1) can be circular or rectangular. 3. The ladder beam according to claim 1, characterized in that: the connector (2) is an integral structure with a straight line in the middle and rings at both ends. 4. The ladder beam according to claim 1, characterized in that: the connecting piece (2) is sleeved on the beam frame (1) through the annular holes at both ends. 5. The ladder beam according to claim 1, characterized in that: the material of the ladder beam frame (1) and the connecting piece (2) is steel. the

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