CN205445636U - U shaped steel support with strutting arrangement is surely tied to flexibility - Google Patents

Abstract

The utility model discloses a U-shaped steel bracket with a flexible and stable support device, which comprises a top beam (1), a column leg (2), a connecting piece (3) and an arched inner support part (4); the arched inner support The components are installed on the top beam or the outrigger, including the bracket connector (41), the support rod (43) and the support rod connector (44); the bracket connector is at least two pieces, including the cable clamping plate (411), clamping Cable seat II (412) and cable bolts; the outer side of the cable seat II (412) facing the inner side of the arch structure is provided with a hinged seat fixedly connected to it; the support rod is at least two pieces, one end of which is connected to the The cable holder II is hingedly connected, and the other end is fixedly connected by lap joint clamping of the support rod connector. The U-shaped steel support with a flexible and stable support device has a simple structure and high support strength, and can effectively support a small-area local pressure at a certain position of the roadway, thereby realizing safe support.

Description

U-shaped steel bracket with flexible and stable support device

technical field

The utility model relates to a U-shaped steel bracket, in particular to a U-shaped steel bracket with a flexible and stable support device which can give way to local pressure on the surrounding rock of a roadway, and belongs to the technical field of underground support equipment for coal mines.

Background technique

U-shaped steel bracket is a passive support with high tensile strength and compressive strength, good toughness, high support force, high support strength, and can be used many times. It is widely used in mine roadways. Especially in deep complex roadways and soft coal seam roadways, it is usually mainly used for secondary support of mine roadways and mine roadways of tunnels through mountains.

The best stress state of the U-shaped steel bracket is that the back of the wall is filled and compacted to make it evenly compressed. When the surrounding rock pressure value acting on the U-shaped steel bracket reaches a certain value, the bracket will be compressed, so that the surrounding rock acts on the U-shaped steel bracket. The pressure on the support drops, thereby avoiding the surrounding rock pressure being greater than the bearing capacity of the U-shaped steel support and causing the support to be damaged.

Existing U-shaped steel brackets usually include top beams, column legs and connectors. The top beams and column legs are overlapped and connected through connectors. Multiple U-shaped steel brackets can usually be connected as a whole through inter-frame tie rods. This traditional The U-shaped steel bracket of the structure can effectively support the large-area stable pressure of the roadway through deformation and contraction to absorb energy, but the pressure change inside the roadway cannot be completely predicted accurately. The ability of the traditional U-shaped steel bracket to withstand lateral pressure It is weaker than the ability to bear the top pressure, especially for a small area of a certain position on the roof of the roadway, which will usually cause the top beam of the U-shaped steel bracket at the corresponding position to be affected by the lateral pressure, resulting in uneven force around the bracket, which is easy to Local overload and eccentric loading of the bracket will result in a decrease in the bearing capacity and stability of the bracket, and even damage due to excessive force beyond its bearing capacity; at the same time, the stability of the bracket will further decline after contraction and slippage, which will easily cause the bracket to become unstable Or the support fails, which affects the roadway support effect and brings greater safety hazards. Not only is it difficult to replace, but the replacement is usually very dangerous.

Contents of the invention

In view of the above problems, the utility model provides a U-shaped steel bracket with a flexible and stable support device with a simple structure, which has high lateral support strength, and can carry out lateral transfer for a small area of local high-stress pressure at a certain position of the roadway And energy absorption, thereby reducing local deformation, and enhancing the supporting capacity and stability of the overall structure, so as to achieve safe support.

In order to achieve the above purpose, the U-shaped steel bracket with a flexible and stable support device includes a top beam, column legs and connectors. The top beam and the legs are made of U-shaped steel, and the top beam and the legs are equipped with mutual matching Bending curvature, two pieces of outriggers and at least one top beam are lapped and connected together to form an arched structure on the inner wall of the roadway; A U-shaped structure that matches the shape of the U-shaped steel, and cable bolt mounting holes are provided on the cable seat I;

The U-shaped steel bracket with a flexible and stable support device also includes an arched internal support part, and the arched internal support part is installed on the top beam or the outrigger, including bracket connectors, support rods and support rod connectors;

There are at least two bracket connectors, including cable clamping plate, cable clamping seat II and cable clamping bolts; the cable clamping plate is arranged on the outside of the arched structure, and the cable clamping plate is provided with mounting holes for cable clamping bolts; cable clamping base II The inner surface of the cable is set as a U-shaped structure that matches the shape of the U-shaped steel. The corresponding cable plate on the cable holder II is also provided with cable bolt installation holes. The outer surface of the cable holder II facing the inner side of the arch structure is provided with a A hinged seat fixedly connected to it;

There are at least two support rods, one end of the support rod is hingedly connected with the hinge seat of the cable holder II through a hinge pin, and the other end is fixedly connected by lap joint clamping of the support rod connector;

The supporting rod connecting piece comprises an upper splint, a lower splint and splint connecting bolts.

As a further improvement of the utility model, the arched internal support part also includes a moving device for the bracket connector, which is installed on the top beam or the leg, and the moving device for the bracket connector is connected to the cable board .

As an embodiment of the present utility model, the moving device of the support connector is a winch structure, including a plurality of winches and wire ropes wound on the winches, and the position of the winch corresponding to the support connector is fixedly installed above and below the support connector On the top beam or outrigger of the arched structure, the position corresponding to the capstan on the top beam or outrigger is provided with a piercing hole, and one end of the wire rope passes through the piercing hole and is arranged inside the U-shape of the U-shaped steel and connected with the clamping cable. One end of the plate is connected and the other end is wound around and connected to the capstan.

As a further improvement of the utility model, the piercing hole and the U-shaped inner surface of the U-shaped steel are provided with wire rope guide wheels or wire rope guide rollers along the pulling direction of the wire rope.

As a preferred solution of the present utility model, the moving device for the bracket connector further includes a crank, one end of which is connected to the axis of the winch through a quick connection structure.

As a further improvement of the utility model, the support rod is suspended and connected under the top beam through a connecting mechanism.

As a preferred solution of the present utility model, the connecting mechanism is a steel wire rope or a chain.

As a further improvement of the present utility model, the arched inner supporting parts are arranged in multiples up and down along the arched structure.

As a further improvement of the utility model, the support rod also adopts a U-shaped steel structure.

As a further improvement of the utility model, the support rod connectors are arranged in multiple pieces along the length direction of the support rod.

Compared with the prior art, the U-shaped steel bracket with a flexible and stable support device is provided with arched internal support parts arranged left and right under the top beam, and the cable plate of the bracket connector faces the top beam and the outrigger overlaps. After the connection, one side of the arched structure that together forms the inner wall of the roadway is provided with a hinge seat fixedly connected with it, one end of the support rod is hingedly connected with the hinge seat of the bracket connector through a hinge pin, and the other end of the support rod is lapped by a support rod connector Clamping and fixed connection, so when a small area of a certain position on the roof of the roadway is locally pressed, the support rod in the overlapping clamping state of the arched inner support part at this position has a certain frictional working resistance and a certain shrinkage. When the force is too large, the support rod can overcome the friction force and slide inward until it reaches a new balance point, thereby protecting the top beam and outriggers forming the arch structure and avoiding the top beam or The support leg exceeds its bearing capacity and is destroyed, thereby realizing effective support and improving the support strength of the U-shaped steel bracket with a flexible and stable support device; the U-shaped steel bracket with a flexible and stable support device has a simple structure and is easy to process and manufacture. Installation, especially suitable for support in deep complex roadways and soft coal seam roadways.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is a front view of the utility model;

Fig. 3 is a three-dimensional structural schematic diagram of the utility model adopting multiple arched internal support components.

In the figure: 1. Top beam, 2. Column leg, 3. Connecting piece, 4. Arched internal support part, 41. Bracket connecting piece, 411. Cable clamping plate, 412. Cable clamping seat II, 42. Bracket connecting piece Mobile device, 43, support rod, 44, support rod connector.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in FIG. 1 , the U-shaped steel bracket with a flexible and stable support device includes a top beam 1 , a column leg 2 , a connector 3 and an arched inner support member 4 .

Both the top beam 1 and the supporting leg 2 are made of U-shaped steel, and the top beam 1 and the supporting leg 2 are provided with mutually matching bending curvatures, and the two supporting legs 2 and at least one top beam 1 pass through the connecting piece 3 After lap connection, they together form an arched structure on the inner wall of the roadway, and multiple arched structures are connected by inter-frame tie rods to form a whole.

The connector 3 includes a cable clamp I and a cable bolt, the inner surface of the cable clamp I is set to a U-shaped structure that matches the shape of the U-shaped steel, and the cable clamp I is provided with a clip for installing the cable bolt. Cable bolt installation holes, by fastening the cable bolts on the cable seat I to realize the overlapping fastening connection of the top beam 1 and the outrigger 2.

The arched internal support part 4 is installed on the top beam 1 or the leg 2, and includes a bracket connector 41, a support rod 43 and a support rod connector 44;

The bracket connector 41 is set at least in two pieces, including a cable clamping plate 411, a cable clamping seat II 412 and a clamping cable bolt; the clamping cable plate 411 is arranged on the outside of the arched structure, and the cable clamping plate 411 is provided with holes for installing the cable clamping bolts. Mounting holes for cable bolts; the inner surface of the cable seat II 412 is set to a U-shaped structure that matches the shape of the U-shaped steel. Corresponding cable plate 411 on the cable seat II 412 is also provided with cable bolt mounting holes. The cable seat II 412 faces The outer side of the inner side of the arched structure is provided with a hinged seat fixedly connected to it, and the bracket connecting piece 41 and the top beam 1 or the outrigger are realized by connecting the cable bolts on the cable plate 411 and the cable seat II 412 and fastening them. 2 fastening connection;

The support rod 43 is arranged in at least two pieces, one end of the support rod 43 is hingedly connected to the hinge seat of the cable seat II 412 through a hinge pin, and the other end is fixedly connected through the lap clamping of the support rod connector 44;

The support bar connector 44 includes an upper splint, a lower splint and a splint connecting bolt, and the lap connection of two supporting rods 43 is realized by passing through the splint connecting bolts on the upper splint and the lower splint and fastening them.

When the U-shaped steel bracket with a flexible and stable support device is in use, the bracket connector moving device 42 is first installed on the top beam 1 or the outrigger 2, and then the top beam 1 and the outrigger 2 are lapped and connected by the connector 3 After being supported on the roadway roof and floor, fasten the cable bolts of the connecting piece 3 at the overlapping position of the top beam 1 and the outrigger 2, and then connect the multiple arch structures into a whole through the tie rods between the frames, and then according to the expected The calculation data of the incoming pressure of the roadway Insert the cable plate 411 into the gap between the outer side of the arched structure and the wall of the roadway at the expected incoming pressure position of the arch structure, and then pass the cable seat II 412 and the cable plate 411 through the cable The bolts are fastened and connected, and then the hinge pin is penetrated on the cable seat II 412 to hinge the support rod 43, and the two support rods 43 are overlapped and fixedly connected through the support rod connector 44. The arched internal support part 4 That is, an effective support is formed inside the arch structure.

When the roadway is pressed or partially pressed, there is friction between the top beam 1 and the outrigger 2, so as to ensure that the arched structure has a certain working resistance and a certain amount of shrinkage. /or the top beam 1 produces a certain supporting force, and the direction of the supporting force is along the axis direction of the supporting rod 43. When the supporting force gradually increases to the maximum clamping friction working resistance of the supporting rod connector 44, the supporting rod 43 can overcome the friction The power slides inward until a new equilibrium point is reached, thereby protecting the supporting legs 2 and/or the top beam 1 forming the arched structure, preventing the supporting legs 2 or the top beam 1 from exceeding their bearing capacity and being damaged, while the support rod 43 can The high stress on one side is transferred to balance the force on both sides of the arch mechanism, which not only realizes effective support, improves the support strength of the entire U-shaped steel bracket, but also improves the overall stability of the bracket.

Because the roadway pressure or local pressure position is usually only based on the calculated expected position, which is usually an inaccurate variable value, in order to enable the arched inner support member 4 to achieve effective support according to the variability of the expected position, as the utility model As a further improvement, the arched internal support part 4 also includes a bracket connector moving device 42, the bracket connector moving device 42 is installed on the top beam 1 or the leg 2, and the bracket connector moving device 42 is connected with the card cable The plate 411 is connected, and the bracket connector moving device 42 can drive the cable plate 411 to drive the bracket connector 41 to move within a certain range on the arched structure as a whole under the premise of loosening the cable bolts of the bracket connector 41 for position adjustment. First loosen the cable bolts and splint connecting bolts on the arched internal support part 4, and then tighten the cable bolts and splint connecting bolts after the position is adjusted, so as to realize effective support.

Since the U-shaped internal space of the U-shaped steel is relatively small, in order to make full use of this narrow space to realize the movement control of the cable clamping plate 411, as an embodiment of the present invention, the moving device 42 of the bracket connector is a winch structure , including a plurality of winches and wire ropes wound on the winches, the position of the corresponding bracket connector 41 of the winch is fixedly installed on the top beam 1 or the leg 2 of the arched structure above and below the bracket connector 41, the top beam 1 or leg 2 is provided with a piercing hole at the position corresponding to the winch, and one end of the wire rope passes through the piercing hole and is arranged inside the U-shape of the U-shaped steel and connected with one end of the cable clamping plate 411, and the other end is wound on the winch and connected with the winch The connection is to realize the wire rope pulling the cable plate 411 by driving and rotating the winches at different positions, and then realize the movement of the pulling bracket connecting part 41 on the arched structure.

In order to prevent wear caused by friction with the piercing hole and the U-shaped inner surface of the U-shaped steel during the pulling process of the wire rope, as a further improvement of the utility model, the piercing hole and the U-shaped inner surface of the U-shaped steel are provided with an edge The wire rope guide wheel or the wire rope guide roller of the wire rope pulling direction.

The winch can be rotated by hydraulic or electric drive, and can also be driven by a crank. Due to the complex working conditions and environment in the mine, the former has a more complicated structure and higher cost, while the latter has a simpler structure and operation and lower cost. Low, so the latter is preferred, that is, as a preferred solution of the present invention, the bracket connector moving device 42 also includes a crank, and one end of the crank is connected to the axis of the winch through a quick connection structure, and the operator can pass Shake the crank to drive the winch to rotate. Because the gap between the outer side of the arch structure and the roadway wall is usually small or even no gap, it is relatively difficult to move the cable clamping plate 411, so the radius of rotation of the crank can be set large enough to further achieve better The purpose of the big drive.

In order to ensure that the support rod 43 of the arched inner support part 4 is evenly stressed and slides in the horizontal direction, and prevent the downward shear force due to the influence of its own gravity, thereby affecting the support effect, as a further improvement of the utility model, the The above-mentioned support rod 43 is suspended and connected below the top beam 1 through a connecting mechanism.

The connection mechanism can adopt a rigid connection structure such as direct connection of steel plates, or a flexible connection structure such as steel wire rope or chain connection, because the latter is easier to press and change the arched internal support according to the small area at different positions of the roadway roof The position of the component 4 is therefore preferably the latter, that is, as a preferred solution of the present utility model, as shown in FIG. 1 , the connecting mechanism is a wire rope or a chain.

In order to further enhance the compressive strength of the arched structure, as a further improvement of the present invention, the arched inner support member 4 is provided in multiples up and down along the arched structure.

In order to increase the pre-tightening force of the support rod 43 when the support rod connector 44 is clamped, as a further improvement of the present invention, the support rod 43 also adopts a U-shaped steel structure.

In order to further increase the pre-tightening force of the support rod 43 in the clamped state of the support rod connector 44, as a further improvement of the utility model, the support rod connector 44 is arranged in multiple pieces in the length direction of the support rod 43 .

The U-shaped steel bracket with a flexible and stable support device is provided with an arched internal support part 4 arranged left and right under the roof beam 1, and the cable plate of the bracket connector 41 faces the roof beam 1 and the legs 2 after lap connection. One side of the arched structure of the inner wall of the roadway is provided with a hinge seat fixedly connected to it, one end of the support rod 43 is hingedly connected with the hinge seat of the bracket connector 41 through a hinge pin, and the other end of the support rod 43 is connected through a support rod connector 44 The overlapping clamping is fixedly connected, so when a small area of a certain position of the roof of the roadway is pressed locally, the support rod 43 in the overlapping clamping state of the arched inner support part 4 at this position has a certain frictional working resistance and A certain shrinkable amount can support the arched structure. When the force is too large, the support rod 43 can overcome the frictional force and slide inward until a new equilibrium point is reached, thereby protecting the top beam 1 and the support that form the arched structure. Leg 2, to prevent the top beam 1 or support leg 2 from being damaged beyond its bearing capacity, thereby realizing effective support and improving the support strength of the U-shaped steel bracket with a flexible and stable support device; this U-shaped steel bracket with a flexible and stable support device The profiled steel support has a simple structure and is easy to manufacture and install, and is especially suitable for support in deep complex roadways and soft coal seam roadways.

Claims (10)

1. a U-shaped steel bracket with flexible steady knot support, including back timber (1), post lower limb (2) and connector (3), back timber (1) and supporting leg (2) all use and are equipped with the bending curvature worked in coordination on U-shaped steel work and back timber (1) and supporting leg (2), and two pieces supporting leg (2) and at least one back timber (1) surround the domes of tunnel inwall jointly by connector (3) overlap joint after being connected；Connector (3) includes that card cable seat I and card cable bolt, card cable seat I inner surface are arranged to the U-shaped structure of the form fit with U-shaped steel, and card cable seat I is provided with card cable bolt installing hole；It is characterized in that,

The U-shaped steel bracket originally with flexible steady knot support also includes inner arched support member (4), inner arched support member (4) is arranged on back timber (1) or supporting leg (2), including stand connection (41), support bar (43) and supporting bar connector (44)；

Stand connection (41) sets at least to two pieces, including card cable plate (411), card cable seat II (412) and card cable bolt；Card cable plate (411) is arranged on the outside of domes, and card cable plate (411) is provided with card cable bolt installing hole；The medial surface of card cable seat II (412) is arranged to the U-shaped structure of the form fit with U-shaped steel, upper corresponding card cable plate (411) of card cable seat II (412) also is provided with card cable bolt installing hole, and card cable seat II (412) is provided with the hinged seat being secured to connect towards the lateral surface position inside domes；

Support bar (43) sets at least to two pieces, and support bar (43) one end is articulated and connected by the hinged seat of swivel pin with card cable seat II (412), the other end is fixedly clamped by supporting bar connector (44) overlap joint is connected；

Supporting bar connector (44) includes train wheel bridge, lower plate and clamping plate connecting bolt.

The U-shaped steel bracket with flexible steady knot support the most according to claim 1, it is characterized in that, described inner arched support member (4) also includes that stand connection mobile device (42), stand connection mobile device (42) are arranged on back timber (1) or supporting leg (2) is upper and stand connection mobile device (42) is connected with card cable plate (411).

The U-shaped steel bracket with flexible steady knot support the most according to claim 2, it is characterized in that, described stand connection mobile device (42) is winch configurations, including multiple capstan winches and the steel wire rope being wrapped on capstan winch, the position of capstan winch correspondence stand connection (41) is fixedly mounted on back timber (1) or the supporting leg (2) of the domes above and below stand connection (41), the position of described back timber (1) or the upper corresponding capstan winch of supporting leg (2) is provided with jack hole, steel wire rope one end is arranged on the U-shaped inside of U-shaped steel through jack hole and is connected with one end of card cable plate (411), the other end is wrapped on capstan winch and is connected with capstan winch.

The U-shaped steel bracket with flexible steady knot support the most according to claim 3, it is characterised in that the U-shaped inner surface of described jack hole and U-shaped steel is provided with the guide wheel for steel wire along steel wire rope tractive trend or steel wire rope guide roller.

5. according to the U-shaped steel bracket with flexible steady knot support described in claim 3 or 4, it is characterised in that described stand connection mobile device (42) also includes crank, and one end of crank is connected with the axis of described capstan winch by fast joint structure.

6. according to the U-shaped steel bracket with flexible steady knot support described in Claims 1-4 any claim, it is characterised in that described support bar (43) is hung by bindiny mechanism and is connected to back timber (1) lower section.

The U-shaped steel bracket with flexible steady knot support the most according to claim 6, it is characterised in that described bindiny mechanism is steel wire rope or chain.

8. according to the U-shaped steel bracket with flexible steady knot support described in Claims 1-4 any claim, it is characterised in that described inner arched support member (4) is setting up and down for multiple along domes.

9. according to the U-shaped steel bracket with flexible steady knot support described in Claims 1-4 any claim, it is characterised in that described support bar (43) is also adopted by U-shaped steel construction.

10. according to the U-shaped steel bracket with flexible steady knot support described in Claims 1-4 any claim, it is characterised in that described supporting bar connector (44) is set to more than one piece on support bar (43) length direction.