CN2084981U

CN2084981U - Pi-shaped trapezoidal supporter telescopic in two way

Info

Publication number: CN2084981U
Application number: CN 91204791
Authority: CN
Inventors: 刘英华
Original assignee: HENAN INST OF COAL SCIENCE
Current assignee: HENAN INST OF COAL SCIENCE
Priority date: 1991-03-30
Filing date: 1991-03-30
Publication date: 1991-09-18

Abstract

The utility model discloses a Pi-shaped retractive piece I-steel trapezoidal support retractive in double directions, which belongs to the mine support device, being characterized in that the Pi-shaped retractive piece is symmetrically embedded through the both sides of the I-steel for mine in the support; a positioning I-steel is clamped between the two Pi-shaped steels on the top of the support leg; a positioning groove is arranged in the contacting place between the two Pi-shaped steels and a clamp cable and a wedge block. The utility model can be used for the preparatory lanes of mine or other underground engineering lanes restractive to press and has the advantages of homogeneous stress, good guidance quality, strong working resistance, high bending-resistant and torsional strength, etc.

Description

Pi-shaped trapezoidal supporter telescopic in two way

Belong to mine support equipment

Known two-way collapsible timbering is because the gap that inevitable mismachining tolerance causes between the external member of its member that can contract and the internal member is bigger, guidance quality was poor when pressurized shrank, two axis is not parallel, produce the phenomenon or change the size of sliding-frictional resistance at random of refusing to contract when shrink sliding, influence the mechanical property of support, its bending resistance torsional strength is lower, and it is big also to exist weight, the processing technology complexity, the more high shortcoming of manufacturing cost.

The purpose of this utility model, then be in order to overcome the above-mentioned weak point of known technology, design a kind of trapezoidal two-way collapsible timbering of π shape telescopic piece i iron that has constant-resistance, no gap, allows the pressure shrinkage, to improve the mechanical property of the trapezoidal two-way collapsible timbering of i iron, improve mine development heading supporting effect, reduce supporting consumption, guarantee supporting safety.

The two-way collapsible timbering of π shape telescopic piece I-shaped described in the utility model is by two frame legs 1 and three π shape telescopic pieces 2, set a roof beam in place 3 and location i iron 4 grades partly constitute, it is characterized in that support can contract assembly 2 by location i iron 4, members such as π shape shaped steel 5 card cables 7 and voussoir 9 are formed, and the outside at π shape shaped steel is processed with groove 8, can guarantee does not have relative displacement between π shape steel and card cable, in frame leg and back timber contact position, the outline of π shape shaped steel is flush 10, arc all is processed into together with location i iron 4 in π shape shaped steel inboard, and with bolt assembly 6 with π shape shaped steel with the location i iron be connected as a single entity, thereby make the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron obtain best mechanical property.

Advantage of the present utility model is the bilateral symmetry embedding of the π shape shaped steel 5 of π shape telescopic piece 2 from location i iron 4, by 7 lockings of card cable, have the relative position that groove 8 can guarantee card cable 7 and π shape telescopic piece in card cable 7 and π shape steel contact position, when allowing pressure shrink, there is not the gap of moving about, guidance quality is good, and is symmetrically and evenly stressed, do not have and refuses to hinder phenomenon, has bending resistance preferably, torsional strength.In the frame leg and the contact position of setting a roof beam in place, the outline of π shape shaped steel is flush, and π shape shaped steel inboard and location i iron all are processed into arc, and the both sides wall thickness is symmetry equivalent, the lateral displacement of setting a roof beam in place on the frame leg be can limit, thereby the resistance to overturning and the mechanical property of support improved.

Description of drawings:

Accompanying drawing 1 is the assembled front view of the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron, in Fig. 1, and 1, the frame leg; 2, the π shape assembly that can contract; 3, set a roof beam in place.Fig. 2 is the partial enlarged drawing of trapezoidal two-way collapsible timbering beam of π shape telescopic piece i iron and frame leg connection place, in Fig. 24, the i iron of location; 5, π shape shaped steel; 6, bolt assembly; 10, π shape steel is flush.Fig. 3 is that the B of Fig. 2 is to view, in Fig. 33, set a roof beam in place; 4, location i iron; 5, π shape shaped steel; 6, bolt assembly.Fig. 4 is the A-A sectional view of π shape telescopic piece 2, in Fig. 4,4, the location i iron; 5, π shape shaped steel; 7, card cable; 8, groove; 9, voussoir.Fig. 5 is the C-C sectional view of Fig. 4, in the drawings, and 4, the location i iron, 5, π shape shaped steel; 8, groove; 9, voussoir.

Implement the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron described in the utility model, two mining i beams (also available common i iron) frame leg 1 of processing in advance and two are set a roof beam in place 3 to be ready to, but not isometric yet not isometric of two length of 3 of setting a roof beam in place.The outside on frame leg π shape telescopic piece top is processed into flush, arc is processed on π shape steel inboard and i iron top, location, and assemble with the location i iron of bolt assembly with π shape steel and the folded spy of π shape steel, π shape telescopic piece is embedded in the I-shaped steel tank of frame leg with card cable 7 and voussoir 9 then, form two frame legs, again with card cable 7, voussoir 9 and π shape telescopic piece are combined into a back timber frame on two frame legs with the two-section i iron, the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron by the above-mentioned requirements assembling, be used for mine working or other underground engineering support, can obtain best supporting effect.

Claims

1, by two frame legs 1 and three groups of π shape telescopic piece (2), set a roof beam in place (3) and locate the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron that part such as i iron (4) constitutes, it is characterized in that π shape telescopic piece embeds from the bilateral symmetry of support mining i beam, clamping one location i iron 4 also tightly locks together two π shape steel and a location i iron with bolt assembly (6) between the two π shape steel of frame leg upper end, and all has positioning groove (8) in the contact position of two π shape steel and card cable and voussoir.

2, the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron as claimed in claim 1 is characterized in that frame leg upper end, and the outline of two π shape telescopic pieces is flush (10), and wall thickness is symmetry equivalent; Arc all is processed in the inboard in the scope corresponding to the i iron width of setting a roof beam in place.

3, the trapezoidal two-way collapsible timbering of π shape telescopic piece i iron as claimed in claim 1, the bolt locking end of assembly (2) of can contracting that it is characterized in that setting a roof beam in place has replaced location i iron (4) with h beam cap (3).