Lifting appliance suitable for lifting concrete products with holes

Abstract

The utility model discloses a lifting appliance suitable for lifting concrete products with holes. The lifting appliance comprises a clamp arm, a clamp tooth, a pin shaft, an anti-falling rod and a lifting hook hole. According to the lifting appliance, the component is lifted in the mode that the clamp teeth stretch into the preformed holes to be tightly attached to the inner surface of the component, and compared with the lifting mode that a traditional lifting appliance clamps the two ends of the whole component for lifting, on one hand, the shaking phenomenon of the component in the lifting process can be effectively reduced due to the fact that the contact area of the clamp teeth and the component is increased; on the other hand, due to the fact that the lifting appliance extends into the component, the phenomenon that the component turns over, overturns and even falls off in the lifting process can be avoided, and the safety of lifting operation is greatly improved; according to the lifting appliance, the concrete product with the holes can be lifted only through one reserved hole site, and compared with a traditional lifting appliance which at least needs two clamping points, the operation procedure can be simplified, and the construction efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hoisting construction equipment technical field, concretely relates to a kind of lifting appliance suitable for hoisting of concrete product with hole. BACKGROUND

[0002] Fabricated concrete structure has become one of the important development directions in modern engineering construction field, compared with traditional cast-in-place construction method, fabricated structure uses prefabricated component in factory to be transported to site and then assembled.The prefabricated component is standardized and mass-produced, and fabricated structure has many advantages, such as stable engineering quality, full recycling, wide application range of special-shaped structure, etc.In addition to the above characteristics of appearance, structure and environment, fabricated structure has more outstanding advantages in construction direction: on the one hand, it can shorten the construction period and save labor, which helps to further reduce the cost of engineering construction;on the other hand, due to the simple and fast construction process, it can reduce the negative impact on the environment caused by construction, and the construction is less affected by weather factors, which has significant technical advantages and follows the principle of sustainable development, and can better respond to the "green construction" strategic planning advocated by the state, so the overall development and application prospect is broad.

[0003] At present, the prefabricated component of fabricated structure is mainly concrete product, and on-site hoisting is one of the important links in the construction method of the structure, and the selection of hoisting tool is mainly the use of clamp type fixture, the main principle of which is to adjust the clamping jaw through the clamping arm to clamp and fasten the two ends of the whole component inward, so as to improve the hoisting of the component, but when the overall volume or single area of the component is large, it is not only difficult to clamp and fix, but also there are serious safety hazards such as component overturning and turning over, which greatly increases the hoisting difficulty and complexity, and simply increasing the clamping force of the clamping arm and the contact area between the clamping jaw and the component cannot fundamentally solve the above problems.The shape of fabricated component usually needs to consider the design requirements of construction project, so it is inevitable that a part of concrete products need to reserve intermediate holes during prefabrication, and hoisting by means of prefabricated component reserved hole can effectively improve the simplicity and safety of hoisting operation. CONTENT OF UTILITY MODEL

[0004] In view of the above problems, the utility model provides a lifting appliance suitable for hoisting of concrete product with hole, which improves the simplicity and safety of hoisting operation by means of component reserved hole.

[0005] The lifting appliance suitable for hoisting of concrete product with hole comprises clamping arm, clamping jaw, pin shaft, anti-falling rod and lifting hook hole.

[0006] The clamping arm comprises left clamping arm and right clamping arm, and the monomer structure is V-shaped sheet type, which is cut from integral steel;

[0007] The jaw comprises a left jaw and a right jaw, and the monolithic structure is in a rectangular sheet shape, rigidly connected with the left jaw arm and the right jaw arm respectively, the surfaces of the jaw arms and the surfaces of the jaw are perpendicular to each other, and the size and angle of the jaw are controlled by rotating the jaw arm;

[0008] The pin shaft comprises a rotating rod and a bolt, the rotating rod is a connecting structure of the left jaw arm and the right jaw arm, the rotating rod is arranged at the overlapping part of the V-shaped structure inflection point of the left jaw arm and the right jaw arm, the two jaw arms are rotated around the rotating rod as the rotating shaft to realize the opening and closing operation, and the bolt is screwed on the rotating rod as a fixing device of the rotating rod;

[0009] The anti-falling rod comprises a left anti-falling rod and a right anti-falling rod, which are welded on the outer side surfaces of the left jaw arm and the right jaw arm respectively and are perpendicular to the surfaces of the jaw arms, and are used for positioning the depth of the jaw penetrating through the component reserved hole and preventing the lifting appliance from falling into the component interior through the component reserved hole during lifting;

[0010] The lifting hook hole comprises a left lifting hook hole and a right lifting hook hole, which are arranged at the tail ends of the V-shaped structures of the left jaw arm and the right jaw arm respectively, the left lifting hook hole and the right lifting hook hole are coincided with each other after the left jaw arm and the right jaw arm are closed, then the lifting hook or the lifting cable is inserted to fix the opening and closing angle of the two jaw arms, and the clamping and fastening of the component are realized.

[0011] Compared with the existing conventional lifting appliance, the lifting appliance has the following advantages:

[0012] 1) High safety: the lifting appliance is used for lifting the component by the way that the jaw extends into the reserved hole and is close to the inner surface of the component, compared with the lifting way that the conventional lifting appliance clamps the whole component and lifts the two ends, on the one hand, the contact area between the jaw and the component is increased, which can effectively reduce the shaking phenomenon of the component during lifting; on the other hand, the lifting appliance extends into the component, so that the component can be prevented from turning over, overturning or even falling off during lifting, and the safety of the lifting operation is greatly improved;

[0013] 2) High efficiency: the lifting appliance only needs one reserved hole to complete the lifting of the concrete product with holes, compared with the conventional lifting appliance which needs at least two clamping points, the operation process is simplified, and the construction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a front view structural schematic diagram of the lifting appliance suitable for lifting the concrete product with holes;

[0015] Figure 2 is a side view structural schematic diagram of the lifting appliance;

[0016] Figure 3 is a top view structural schematic diagram of the lifting appliance;

[0017] Figure 4 is a front view structural schematic diagram of the concrete component with holes;

[0018] Figure 5 is a top view structural schematic diagram of the component;

[0019] Figure 6 is a side view structural schematic diagram of the component;

[0020] Figure 7 is a front view structural schematic diagram of the hook and fixing device;

[0021] Figure 8 is a side view structural schematic diagram of the hook and fixing device;

[0022] Figure 9 is a structural schematic diagram of the tongs in a closed state when the lifting appliance extends into the component reserved hole;

[0023] Figure 10 is a structural schematic diagram of the tongs in an open state when the lifting appliance clamps the component.

[0024] Reference numerals in the drawings: 1, left tong arm; 2, right tong arm; 3, left tong tooth; 4, right tong tooth; 5, pin shaft; 6, left anti-falling rod; 7, right anti-falling rod; 8, left hook hole; 9, right hook hole; 10, bolt; 11, rotating rod; 12, component reserved hole; 13, fork arm opening; 14, hook; 15, sling. DETAILED DESCRIPTION

[0025] Example 1:

[0026] In combination Figures 1 to 3 as shown, the lifting appliance suitable for hoisting concrete products with holes includes a tong arm, a tong tooth, a pin shaft, an anti-falling rod, and a hook hole;

[0027] The tong arm includes a left tong arm and a right tong arm, and the monomer structure is in the shape of a V-shaped sheet, which is cut from an integral steel;

[0028] The tong tooth includes a left tong tooth and a right tong tooth, and the monomer structure is in the shape of a rectangular sheet, which is rigidly connected to the left tong arm and the right tong arm, respectively. The surface of the tong arm is perpendicular to the surface of the tong tooth, and the size and angle of the tong tooth are controlled by the rotation of the tong arm;

[0029] The pin shaft includes a rotating rod and a bolt. The rotating rod is a connecting structure of the left tong arm and the right tong arm, and is arranged at the overlapping part of the inflection point of the V-shaped structure of the left tong arm and the right tong arm. The two tong arms realize opening and closing operation with the rotating rod as the pivot, and the bolt is screwed on the rotating rod as the fixing device of the rotating rod;

[0030] The anti-falling rod includes a left anti-falling rod and a right anti-falling rod, which are respectively welded on the outer side surfaces of the left tong arm and the right tong arm, and are perpendicular to the surface of the tong arm. The anti-falling rod is used to position the depth of the tong tooth passing through the component reserved hole, and prevent the lifting appliance from falling into the inside of the component through the component reserved hole during hoisting.

[0031] The hook holes include left and right hook holes, which are respectively arranged at the tail ends of the V-shaped structures of the left and right jaw arms. When the left and right jaw arms are closed, the left and right hook holes coincide with each other, and then a hook or a sling is inserted to fix the opening angle of the two jaw arms, so as to realize clamping and fastening of the component.

[0032] The operation method of the lifting appliance is as follows: the left and right jaw arms are rotated around the pin shaft, so that the two hook holes are opened to the left and right ends, so that the left and right jaw teeth are closed, and then the jaw teeth in the closed state are inserted into the component reserved hole until the anti-falling rod reaches the outer surface of the two sides of the component reserved hole; at this time, the left and right jaw arms are rotated in opposite directions around the pin shaft, so that the two hook holes coincide, so that the left and right jaw teeth are expanded outward, the outer vertical surface of the jaw teeth is tightly attached to the inner surface of the two sides of the component reserved hole, and clamping and fastening of the component are realized; the hook or the sling is passed through the coincident hook hole to fix the opening angle of the jaw teeth, and the lifting equipment is used to lift the hook or the sling to complete the hoisting of the component.

[0033] If the plane where the concrete product reserved hole is located is not horizontal, resulting in that the jaw teeth are tightly attached to the lower surface, the left and right hook holes cannot coincide, at this time, a double-chain hook or a sling can be used to hang into the hook hole, and the clamping and fastening of the component are realized by the weight of the component during the lifting of the lifting equipment.

[0034] If the volume and weight of the concrete product are large, and the reserved hole is too small, at this time, the length of the jaw arm and the jaw tooth can be extended, and a hydraulic device can be added at the position of the jaw arm to realize the normal opening and closing of the lifting appliance.

Claims

1. A lifting tool suitable for hoisting perforated concrete products, characterized in that, The lifting device includes a clamp arm, clamp teeth, pin shaft, anti-drop rod, and hook hole; The clamp arm includes a left clamp arm and a right clamp arm. The single unit structure is a V-shaped sheet and is cut from a single piece of steel. The jaws include a left jaw and a right jaw, each with a rectangular plate-like structure. They are rigidly connected to the left and right jaw arms, respectively. The surfaces of the jaw arms and the jaws are perpendicular to each other. The size and angle of the jaws opening and closing are controlled by rotating the jaw arms. The pin includes a rotating rod and a bolt. The rotating rod is the connecting structure between the left and right clamp arms. The rotating rod is located at the overlapping part of the V-shaped structure inflection point of the left and right clamp arms. The two clamp arms open and close by rotating the rotating rod as the pivot. The bolt is tightened on the rotating rod as a fixing device for the rotating rod. The anti-falling rod includes a left anti-falling rod and a right anti-falling rod, which are respectively welded to the outer side of the left clamp arm and the right clamp arm and are perpendicular to the surface of the clamp arm. They are used to position the depth of the clamp teeth through the reserved hole of the component and to prevent the lifting tool from falling into the component through the reserved hole during hoisting. The hook holes include a left hook hole and a right hook hole, which are respectively located at the tail end of the V-shaped structure of the left and right clamp arms. When the left and right clamp arms are closed, the left hook hole and the right hook hole overlap each other. Then, a hook or sling is inserted to fix the opening and closing angle of the two clamp arms, thereby achieving clamping and fastening of the component.

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