CN219408839U - Lifting appliance for mid-span starting method of arched grid - Google Patents

Abstract

The utility model discloses a lifting appliance for an arch grid midspan starting method, which comprises steel lifting plates and lug plates, wherein the lug plates are symmetrically arranged on two sides of the steel lifting plates, lifting holes matched with lifting hooks are formed in the upper parts of the steel lifting plates, connecting pins connected with the lug plates are arranged on the lower parts of the steel lifting plates, and the lug plates are welded on bolt balls of a grid structure. The sling does not need to bind and connect the sling with the bolt ball joint, does not squeeze the high-strength bolt of the lower joint, can directly adopt the lifting hook for lifting, and has safe and efficient lifting; the utility model can be used for starting and hoisting the arch steel net frame with rated load of 9800-13950kg by selecting steel wire ropes with phi 28 mm-phi 52mm, namely under the safety factor of 10 times.

Description

Lifting appliance for mid-span starting method of arched grid

Technical Field

The utility model relates to the technical field of sling tools, in particular to a sling for an arch grid midspan starting method.

Background

The project is a coal-base coal piling awning, which is a bolt sphere arch net rack, the structural form is a quadrangular pyramid upper and lower chord structure, and the installation method adopts a starting method such as gable starting and middle section starting. The midspan lifting method is selected as a middle section starting construction method, and the midspan lifting method can be simultaneously installed on two sides of the gable after starting, so that the installation efficiency is improved, and the application of the method is wider and wider. The midspan lifting method is that a designer selects a section of net frame in the midspan, assembles the net frame on the ground, lifts the net frame by using a crane, simultaneously assembles the net frame from the midspan to two ends, extends the net frame to supports at the two ends to form a stable arch structure, and the subsequent net frame takes the unit as a construction platform and is installed by adopting a high-altitude bulk method. The construction method has the advantages of high construction speed, low safety risk, low cost, high construction quality and the like.

The mode of steel wire rope bundling and hoisting is generally adopted when the grid structure starts and hoisted, under the safety factor of 10 times, a phi 52mm steel wire rope is adopted as the hoisting source, but the hoisting capacity is larger, the steel wire rope is thicker, the steel wire rope and the bolt ball are considered to be bound and connected, and because the size of the bolt ball at the hoisting point is smaller, the steel wire rope cannot meet the bending radius of the steel wire rope once the steel wire rope is larger than phi 28mm during binding and hoisting, and the web member high-strength bolt at the lower part of the grid can be extruded. Because the grid structure is heavy and has large span, positioning adjustment cannot be performed in the grid starting process.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the lifting appliance for the arch grid mid-span starting method, which has reasonable design, and can be used for lifting, dismantling and improving the construction efficiency.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the lifting appliance for the mid-span starting method of the arch-shaped net rack is characterized by comprising steel lifting plates and lug plates, wherein the lug plates are symmetrically arranged on two sides of the steel lifting plates, lifting holes matched with lifting hooks are formed in the upper parts of the steel lifting plates, connecting pins connected with the lug plates are arranged on the lower parts of the steel lifting plates, and the lug plates are welded on bolt balls of the net rack structure.

The technical problem to be solved by the utility model can be further solved by the following technical scheme that a secondary welding seam adopting E50 series welding rods is arranged at the welding position of the lug plate and the bolt ball.

The technical problem to be solved by the utility model can be further solved by the following technical scheme that a reinforcing plate for reinforcing the connection between the lug plate and the bolt ball is welded on the outer side of the lug plate.

The technical problem to be solved by the utility model can also be realized by the following technical scheme that two sides of the steel hanging plate above the hanging hole are symmetrically welded with two limiting plate groups, each group is provided with two limiting plates, and the two limiting plates of each group are symmetrically arranged at two sides of the hanging hole.

The technical problem to be solved by the utility model can be further solved by the following technical scheme that the thickness of the steel hanger plate is 35-45mm, and more preferably 40mm.

The technical problem to be solved by the utility model can be also realized by the following technical scheme that the thickness of the ear plate is 20-30mm, and more preferably 25mm.

The technical problem to be solved by the utility model can also be achieved by the following technical scheme that the diameter of the connecting pin is 50-70mm, and more preferably 60mm.

Compared with the prior art, the sling provided by the utility model does not need to bind and connect the sling with the bolt ball node, does not squeeze the high-strength bolt of the lower node, can directly adopt the lifting hook for lifting, and is safe and efficient in lifting; the utility model can be used for starting and hoisting the arch steel net frame with rated load of 9800-13950kg by selecting steel wire ropes with phi 28 mm-phi 52mm, namely under the safety factor of 10 times.

Drawings

FIG. 1 is a block diagram of a pre-bending die in a lifting appliance for an arch grid midspan starting method according to the utility model;

fig. 2 is a side view of fig. 1.

In the figure: 1-bolt ball, 2-lug plate, 3-connecting pin, 4-steel hanging plate, 5-hanging hole, 6-limiting plate and 7-reinforcing plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 and 2, an arch grid is spanned and is started method hoist, this hoist includes steel hanger plate 4 and otic placode 2, and otic placode 2 symmetry is established in steel hanger plate 4 both sides, and steel hanger plate 4 upper portion is equipped with and hangs hook complex lifting hole 5, and steel hanger plate 4 lower part is equipped with the connecting pin 3 that meets with otic placode 2, and the cover has the round pin cover on connecting pin 3, and the round pin cover both ends pass steel hanger plate welding on the otic placode of steel hanger plate both sides, strengthen the connection of steel hanger plate and otic placode, and otic placode 2 welding has the stud ball 1 at grid structure the otic placode 2 outside welding has the reinforcing plate 7 that is used for strengthening the connection between otic placode and the stud ball the steel hanger plate both sides symmetry above hanging hole 5 have welded limiting plate group, and two limiting plate 6 symmetry of every group are established in the lifting hole both sides.

According to the utility model, a special lifting appliance is welded on a lifting point bolt ball, the lifting appliance is made of Q355B, a welding seam between an ear plate and the bolt ball is a secondary welding seam, E50 series welding rods are adopted for welding, the bolt ball is preheated to 150-200 ℃ for welding, the ear plate and a lifting hook are connected with the ear plate by adopting a steel lifting plate with the thickness of 40mm, and the connection part of the ear plate and the ear plate is connected by adopting a pin connection mode, so that the connection mode meets the requirements.

Calculating a lifting point lifting appliance:

lifting point weight standard value 300000 (N)

Lifting point weight design value 300000 (N) 1.3×1.5/0.75= 780000 (N)

Wherein 1.3 is dynamic load coefficient, 1.5 is subentry coefficient, and 0.75 is crane non-uniformity coefficient.

(1) Pin shaft calculation

The diameter of the pin shaft is 60mm, the material Q355B,

pin compressive stress 60 x 40 x 400 (N/mm 2) = 960000 (N) >780000 (N) (design value for weight of lifting point)

Pin shear 30 ζ2×3.1416×2×170 (N/mm 2) = 961330 (N) >780000 (N)

(design value of weight of hanging point)

(2) Ear plate calculation

The thickness of the lug plate is 25mm, the material Q355B,

effective weld length 207-20-10=178 (mm)

Weld tension = 178 x 25 x 2 x 290 (N/mm 2) = 2581000>780000 (N) (design point weight)

Ear plate shear stress 25 x 2 (110-33) x 2 x 170 (N/mm 2) = 1309000 (N) >780000 (N)

(design value of weight of hanging point)

Ear plate compressive stress 25 x 2 x 60 x 400 (N/mm 2) =1200000 >780000 (N) (design point weight)

(3) Hanger plate calculation

Hanger plate thickness 40mm, material Q355B, round pin axle department hanger plate shear stress

40.2.110-33.170 (N/mm 2) = 1047200 (N) >780000 (N) (design value of weight of suspension point)

Shear stress of hanging plate at hanging hook place:

40×2×105×170 (N/mm 2) = 1428000 (N) >780000 (N) (lifting point weight design value)

The suspension board compressive stress at the pin shaft: 40×60×400 (N/mm 2) = 960000 (N) >780000 (N) (hanging point weight design value)

The calculation determines that the lifting point lifting appliance meets the lifting requirement.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. The lifting appliance for the mid-span starting method of the arch-shaped net rack is characterized by comprising steel lifting plates and lug plates, wherein the lug plates are symmetrically arranged on two sides of the steel lifting plates, lifting holes matched with lifting hooks are formed in the upper parts of the steel lifting plates, connecting pins connected with the lug plates are arranged on the lower parts of the steel lifting plates, and the lug plates are welded on bolt balls of the net rack structure.

2. The lifting appliance for mid-span starting method of arched grid according to claim 1, wherein the welding position of the lug plate and the bolt ball is provided with a secondary welding seam adopting E50 series welding rods.

3. The hanger for mid-span starting of an arched grid according to claim 1, wherein a reinforcing plate for reinforcing the connection between the lug plate and the bolt ball is welded on the outer side of the lug plate.

4. The lifting appliance for the mid-span starting method of the arched grid frame according to claim 1, wherein two limiting plate groups are symmetrically welded on two sides of the steel lifting plate above the lifting hole, each group comprises two limiting plates, and the two limiting plates of each group are symmetrically arranged on two sides of the lifting hole.

5. The lifting appliance for mid-span starting method of arched grid according to claim 1, wherein the thickness of the steel lifting plate is 35-45mm.

6. The lifting appliance for mid-span starting method of arched grid frames according to claim 5, wherein the thickness of the steel lifting plate is 40mm.

7. The lifting appliance for mid-span starting method of arched grid according to claim 1, wherein the thickness of the ear plate is 20-30mm.

8. The hanger for mid-span launch of an arched grid of claim 7, wherein said ear panels have a thickness of 25mm.

9. The hanger for mid-span launch of an arched grid according to claim 1, wherein the diameter of the connecting pins is 50-70mm.

10. The spreader for mid-span launch of an arched grid as recited in claim 9, wherein said connecting pins have a diameter of 60mm.