CN111764406A - An adjustable cable - Google Patents

Abstract

The invention relates to the technical field of machining, in particular to an adjustable inhaul cable which comprises a fixed bolt, a first connecting piece, a second connecting piece, a chain block and a lifting lug, wherein the lifting lug is welded on a steel support; the invention provides a stay cable with adjustable length and angle and suitable for a horizontal steel support of foundation pit support.

Description

An adjustable cable

technical field

The invention relates to the technical field of machining, in particular to an adjustable cable.

Background technique

During the construction of the horizontal steel support for foundation pit support, the horizontal steel support is often easy to fall off, causing a lot of casualties. At present, steel wire ropes are generally used to fix the horizontal steel supports. The method is as follows: one end of the steel wire rope is fixed on the foundation pit wall by bolts, and the other end is fixed on the horizontal steel support.

The Chinese patent with publication number CN207176694U, a cantilever support structure for foundation pit steel support, discloses a cantilever support structure for foundation pit steel support, which includes: vertically arranged in the foundation pit and vertically Steel-supported column piles arranged side by side; steel connecting beams that pass through the column piles and are fixedly installed with the column piles in the middle, the two ends of which protrude from the column piles and form a cantilever structure, and the steel connecting beams It is arranged under each steel support and crosses with each steel support to support each steel support; and a plurality of stay cables, one end of each stay cable is fixedly connected with the part above the steel connecting beam on the column pile, and the other One end is respectively fixed at different positions on the two cantilever ends of the steel coupling beam, so as to form an oblique-stayed suspension cable with the steel coupling beam to realize the cantilever support for the steel coupling beam. The cantilever support structure of the utility model uses a plurality of zippers to connect and fix the steel connecting beam and the lattice columns on the column piles, which can realize a large-length cantilever without increasing the column piles, and form a large number of steel supports. Stable and reliable support.

However, after the axial prestressing of the horizontal steel support is applied, the initial length of the steel support increases; or due to the deformation of the foundation pit and the loss of the axial force, the length of the horizontal steel support will also change after the secondary axial force is applied. During this process, in the method provided by the prior art, the support structure is relatively fixed, which limits the elongation of the horizontal steel support, which brings inconvenience and safety hazards to the construction of the horizontal steel support.

SUMMARY OF THE INVENTION

In view of the above existing problems, the present invention discloses a horizontal steel support cable with adjustable length and angle suitable for foundation pit support. The cable includes a fixing bolt, a first connecting piece, a second connecting piece, a chain hoist and a lifting lug, the lifting lug is welded on the steel support, one end of the fixing bolt is fixed on the wall of the foundation pit, and the other end is connected to the The first connecting piece, the second connecting piece is connected to the lifting lug, and the chain hoist is connected between the first connecting piece and the second connecting piece.

The chain hoist of the present invention is a double hook inverted chain chain hoist commonly used in the prior art. The present invention adopts the hand chain hoist to realize the manual adjustment of the cable when the length of the steel support is changed. Pull the manual chain and hand chain wheel of the chain hoist clockwise to rotate, and the length of the cable decreases; when the length of the cable needs to be increased, pull the hand chain of the chain hoist counterclockwise, the brake seat is separated from the brake pad, and the ratchet is in the position of the pawl. Under the action of static, the five-tooth long shaft drives the hoisting sprocket to run in the opposite direction, and the length of the cable increases.

Preferably, the fixing bolt and the first connecting piece, the first connecting piece and the chain hoist, the hand chain hoist and the second connecting piece, and the second connecting piece and the The connection method of the lifting lugs is hook connection.

The invention cleverly utilizes the hook connection to realize the change of the angle of the stay cable after the length of the steel support changes. The specific explanation is that when the cable needs to be adjusted due to the change of the length of the steel support, in the process of adjusting the chain hoist, the angle between the cable and the horizontal plane can be adaptively changed by hooking up.

Preferably, the fixing bolt is "L" shaped, one side of the fixing bolt is fixed on the wall of the foundation pit, and the other side of the fixing bolt is provided with a through hole for connecting the first connecting piece .

形，两端分别为挂钩和挂环，第一连接件的所述挂钩勾连在所述固定栓的通孔上；第二连接件的所述挂钩勾连在所述吊耳上，所述手拉葫芦的上挂钩和下挂钩分别勾连在所述第一连接件和所述第二连接件的所述挂环上。Preferably, the first connector and the second connector are both

The two ends are hooks and hanging rings respectively. The hook of the first connector is hooked on the through hole of the fixing bolt; the hook of the second connector is hooked on the lifting lug, and the hand pull The upper hook and the lower hook of the hoist are respectively hooked on the hanging rings of the first connecting piece and the second connecting piece.

Preferably, a friction pad is also included, and the friction pad is arranged between the fixing bolt and the first connecting piece, and/or the first connecting piece and the chain hoist, and/or the hand the connection between the hoist and the second connecting piece, and/or the second connecting piece and the lifting lug.

The friction pad of the present invention can increase the frictional force of each connection part and avoid unnecessary sliding during the length adjustment process.

Preferably, the friction pad includes an alloy layer, a silica gel layer and a frosted layer from the inside to the outside.

By using the friction pad provided by the present invention, on the one hand, the friction force of each connecting part can be increased; on the other hand, the wear of the connecting parts can be avoided.

Preferably, the alloy of the alloy layer includes one or more of aluminum alloy, ferromanganese alloy, iron carbon alloy, and ferrosilicon alloy.

Preferably, the grit Ra of the frosted layer is 2.5-6.1 μm; if the grit of the frosted layer is too small, it is easy to slide when the cable is stretched;

Preferably, the steel corbel is also included, the steel corbel is connected to the wall of the foundation pit, and the steel support can be placed on the steel corbel.

Preferably, the steel purlin is also included, and the steel purlin is arranged on the steel corbel.

Compared with the prior art, the above invention has the following advantages or beneficial effects: the present invention provides an adjustable cable for horizontal steel support for foundation pit support, and the cable can change with the length of the steel support, It can also repeat construction, which is safe and economical.

Description of drawings

The present invention and its features, features, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like numbers refer to like parts throughout the drawings. The drawings may not be drawn to scale, emphasis instead being placed upon illustrating the subject matter of the present invention.

Fig. 1 is the structure schematic diagram of adjustable cable in the present invention;

Fig. 2 is the structure schematic diagram of the chain hoist of the adjustable cable in the present invention;

FIG. 3 is a schematic diagram of the installation of the adjustable cable according to the present invention.

Reference numerals: 1, bolt, 2, fixing bolt, 3, first connecting piece, 4, chain hoist, 5, second connecting piece, 6, lifting lug, 7, foundation pit wall, 8, steel support, 9 , Steel purlin, 10, steel corbel.

Detailed ways

It should be understood by those skilled in the art that those skilled in the art can implement variations in combination with the prior art and the above-mentioned embodiments, which will not be repeated here. Such variations do not affect the essential content of the present invention, and will not be repeated here.

In the description of this application, it should be understood that the terms "upper", "lower", "outer", "inner", "front", "rear", "vertical", "horizontal" are based on the The orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

In the description of this application, the terms "first", "second", "third", etc. are only used for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features .

As shown in Figure 1, an adjustable cable is shown, including bolts 1, fixing bolts 2, first connecting pieces 3, chain hoists 4, second connecting pieces 5, lifting lugs 6, foundation pit walls 7, Steel support 8, steel purlin 9, steel corbel 10. The lifting lug 6 is welded on the steel support 8, one end of the fixing bolt 2 is fixed on the foundation pit wall 7 by the bolt 1, the other end is connected to the first connecting piece 3, the second connecting piece 5 is connected to the lifting lug 6, and the chain hoist 4 is connected to the foundation pit wall 7. between the first connector 3 and the second connector 5 . The bolt 1 is an M20 expansion bolt, and the bolt 1 can be used to stably fix the fixing bolt 2 on the foundation pit wall 7 . The connection modes of the fixing bolt 2 and the first connecting piece 3, the first connecting piece 3 and the chain hoist 4, the hand chain hoist 4 and the second connecting piece 5, and the second connecting piece 5 and the lifting lug 6 are all hook connections. The steel corbel 10 is connected to the foundation pit wall 7 , and the steel support 8 can be placed on the steel corbel 10 . The steel purlin 9 is arranged on the steel corbel 10 .

In this embodiment, the fixing bolt 2 is an equilateral angle steel of L100×100×10 mm, and holes for connecting with the bolt 1 and the first connecting piece 3 are respectively provided on the two sides of the angle steel. The holes are symmetrically arranged, and are arranged on each side. At the geometric center, each side is set at one point, one side is connected with the bolt 1, and the other side is connected with the first connecting piece 3, and the hole at the connecting point is slightly larger than the outer diameter of the rod to be connected.

形，长度为700mm，一端弯曲成180°挂钩，弯曲直径为钢筋直径的5倍，弯钩平直段长度80mm，另一端弯曲后成挂环，与钢筋平直段焊接，挂环内径为80mm。In this embodiment, the first connecting piece 3 is made of grade 3 round steel with a diameter of 18 mm that has not been cold drawn, and has a shape of

The length of the hook is 700mm. One end is bent into a 180° hook. The bending diameter is 5 times the diameter of the steel bar. The length of the straight section of the hook is 80mm. .

形，长度为700mm，一端弯曲成180°挂钩，弯曲直径为钢筋直径的5倍，弯钩平直段长度80mm，另一端弯曲后成挂环，与钢筋平直段焊接，挂环内径为80mm。其一端与手拉葫芦4连接，另一端与吊耳6连接。In this embodiment, the second connecting piece 5 is made of grade 3 round steel with a diameter of 18 mm without cold drawing, and the shape is

The length of the hook is 700mm. One end is bent into a 180° hook. The bending diameter is 5 times the diameter of the steel bar. The length of the straight section of the hook is 80mm. . One end is connected with the chain hoist 4 , and the other end is connected with the lifting lug 6 .

In this embodiment, the lifting lugs 6 are made of Q235B steel plate, with a thickness of 8 mm, a length of 120 mm and a height of 120 mm.

In this embodiment, the adjustable cable further includes friction pads not shown in the drawings. The friction pads are arranged on the fixing bolt 2 and the first connecting piece 3 , the first connecting piece 3 and the chain hoist 4 , and the hand chain hoist. 4 is connected to the second connecting piece 5, and the second connecting piece 5 and the lifting lug 6. Specifically, the friction pad is sleeved on the fixing bolt 2 , the first connecting piece 3 , the chain hoist 4 , the second connecting piece 5 , and the lifting lug 6 . The friction pad includes aluminum alloy layer, silicone layer and frosted layer from the inside to the outside. The grit Ra of the frosted layer was 3.5 μm. The friction pad has the following advantages: 1. It can increase the friction of each connecting part to avoid unnecessary slippage in the process of adjusting the length; 2. It can avoid the wear of the connecting parts; 3. While ensuring the friction force, the retractable cable save energy.

As shown in Figure 2, it shows the chain hoist of the adjustable cable. The chain hoist 4 is a double-hook inverted chain circular chain hoist, and the two ends are connected with the first connecting piece 3 and the second connecting piece 5. Pull the chain hoist upside down to adjust the tension of the adjustable cable.

The present invention will be further described below in conjunction with the application of the adjustable cable of the present invention.

As shown in FIG. 3 , a schematic diagram of the installation of the adjustable stay cable is shown, and an adjustable stay cable provided by the present invention is installed on the left and right sides of the horizontal steel support.

When installing for the first time, pull the manual chain and hand chain wheel of the chain hoist clockwise to rotate, the cable is tightened, and the horizontal steel support is stable between the left and right cables. At the same time, since the connection methods of the fixing bolt and the first connecting piece, the first connecting piece and the chain hoist, the hand chain hoist and the second connecting piece, and the second connecting piece and the lifting lug are all hooked, when adjusting the chain hoist, each The connection part can also be fine-tuned for the angle, so that the entire cable is in a straight state. In addition, the friction pad can effectively avoid the adjustment range of the first connecting piece, the chain hoist and the second connecting piece, and increase the stability of the cable.

When the horizontal steel support is axially prestressed, the initial length of the steel support increases. The operator pulls the hand chain of the chain hoist counterclockwise, the brake seat is separated from the brake pad, the ratchet is stationary under the action of the pawl, and the five-tooth long shaft drives the hoisting sprocket to run in the opposite direction, and the length of the cable increases. At the same time, since the connection methods of the fixing bolt and the first connecting piece, the first connecting piece and the chain hoist, the hand chain hoist and the second connecting piece, and the second connecting piece and the lifting lug are all hooked, when adjusting the chain hoist, each The connection part can also be fine-tuned for the angle, so that the entire cable is in a straight state. In addition, the friction pad can effectively avoid the adjustment range of the first connecting piece, the chain hoist and the second connecting piece, and increase the stability of the cable.

The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in ordinary ways in the art; any person skilled in the art, without departing from the present invention Within the scope of the technical solution of the invention, many possible changes and modifications can be made to the technical solution of the present invention by using the methods and technical contents disclosed above, or modified into equivalent embodiments with equivalent changes, which does not affect the essence of the present invention. . Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the protection scope of the technical solutions of the present invention.

Claims (10)

1. An adjustable cable, suitable for the horizontal steel support of foundation pit support, is characterized in that, comprises a fixing bolt, a first connecting piece, a second connecting piece, a chain hoist and a lifting lug, and the lifting lug is welded On the steel support, one end of the fixing bolt is fixed on the wall of the foundation pit, the other end is connected to the first connecting piece, the second connecting piece is connected to the lifting lug, and the chain hoist is connected to the first connecting piece. between the connector and the second connector. 2 . The adjustable stay cable according to claim 1 , wherein the fixing bolt and the first connecting piece, the first connecting piece and the chain hoist, and the hand chain hoist and the The second connecting piece and the connecting manner of the second connecting piece and the lifting lug are all hook connections. 3 . The adjustable stay cable according to claim 1 , wherein the fixing bolt is in an “L” shape, one side of the fixing bolt is fixed on the wall of the foundation pit, and the other side of the fixing bolt is fixed on the wall of the foundation pit. 4 . There is a through hole for connecting the first connecting piece. 4 . The adjustable cable according to claim 3 , wherein the two ends of the first connecting piece and the second connecting piece are hooks and hanging rings, respectively, and the hooks of the first connecting piece are hooked on the hooks. 5 . on the through hole of the fixing bolt; the hook of the second connector is hooked on the lifting lug, and the upper hook and the lower hook of the chain hoist are hooked on the first connector and the second hook respectively on the hanging ring of the connector. 5. The adjustable cable according to any one of claims 2-4, further comprising a friction pad, the friction pad is provided on the fixing bolt and the first connecting member, and/ Or the connection between the first connection piece and the chain hoist, and/or the chain hoist and the second connection piece, and/or the connection between the second connection piece and the lifting lug. 6 . The adjustable cable according to claim 5 , wherein the friction pad comprises an alloy layer, a silica gel layer and a frosted layer from the inside to the outside. 7 . 7 . The adjustable cable according to claim 5 , wherein the alloy of the alloy layer comprises one or more of aluminum alloys, ferromanganese alloys, iron carbon alloys, and ferrosilicon alloys. 8 . 8 . The adjustable cable according to claim 5 , wherein the grit Ra of the frosted layer is 2.5-6.1 μm. 9 . 9 . The adjustable stay cable according to claim 1 , further comprising a steel corbel, the steel corbel is connected to the wall of the foundation pit, and a steel support can be placed on the steel corbel. 10 . 10 . The adjustable stay cable according to claim 9 , further comprising steel purlins, the steel purlins being arranged on the steel corbels. 11 .

Images