CN216588668U

CN216588668U - Adjustable-center tray for supporting anchor rod

Info

Publication number: CN216588668U
Application number: CN202122755572.9U
Authority: CN
Inventors: 胡乃川; 何源; 徐东康; 肖金杰
Original assignee: Shandong Menglu Mining Engineering Co ltd
Current assignee: Shandong Menglu Mining Engineering Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-24
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a center-adjustable tray for supporting an anchor rod, which comprises a bottom disc, a cone and an anchor rod through hole, wherein the cone extends upwards from the upper surface of the bottom disc, the anchor rod through hole axially penetrates through the bottom disc and the cone, the outer diameter of the upper end of the cone is smaller than the inner diameter of the anchor rod hole of the anchor rod disc, the outer diameter of the lower end of the cone is larger than the inner diameter of the anchor rod hole of the anchor rod disc, and a limit table is formed between the lower end of the cone and the excircle of the bottom disc. The contact surface of the tray and the anchor rod disc is set to be the conical surface, and the centering is realized through the action of the conical surface, so that the stress effect of the anchor rod is provided; through setting up the shell fragment, when the tray installation, play the effect that prevents the tray and drop to through setting up the ball, make things convenient for the alignment of tray.

Description

Adjustable-center tray for supporting anchor rod

Technical Field

The utility model relates to the technical field of surrounding rock support, in particular to the field of anchor rod support, and specifically relates to a center-adjustable tray for supporting an anchor rod.

Background

Anchor bolt support is one of the common mode of underworkings support, uses anchor bolt support, exerts pressure to the stock dish through the nut on the stock, reaches the pretension of stock, in order to realize letting press, often sets up between nut and stock dish and lets the clamping ring. But the pressure ring aligning ability of using at present is relatively poor, when screwing up the nut, appears letting the pressure ring to the local application of force of stock dish easily, makes the pretension effect worsen, makes the stock receive bending stress moreover easily, influences stock life.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the center-adjustable tray for the support anchor rod, which is arranged between the pressure-relief ring and the anchor rod tray, realizes center adjustment when a nut is screwed down, and avoids local force transmission.

The utility model is realized by the following technical scheme, and provides a center-adjustable tray for supporting an anchor rod, which comprises a bottom disc, a cone and an anchor rod through hole, wherein the cone extends upwards from the upper surface of the bottom disc, the anchor rod through hole axially penetrates through the bottom disc and the cone, the outer diameter of the upper end of the cone is smaller than the inner diameter of the anchor rod hole of the anchor rod disc, the outer diameter of the lower end of the cone is larger than the inner diameter of the anchor rod hole of the anchor rod disc, and a limit table is formed between the lower end of the cone and the excircle of the bottom disc.

When the adjustable-center tray is used, the anchor rod penetrates through the hole to be sleeved on the anchor rod, the bottom disc is located between the anchor rod disc and the pressure relief ring, the upper end of the cone extends into the anchor rod hole of the anchor rod disc, the conical surface of the cone is in contact with the lower end of the anchor rod hole of the anchor rod disc, and the conical surface is in line contact with the lower end of the anchor rod hole; through the spacing platform that sets up, when the tray inclines to certain angle, spacing platform and stock dish contact prevent that the tray gradient from continuing to strengthen, have avoided the tray slope excessive.

As optimization, still include certainly the upper end of cone upwards extends the sleeve, telescopic external diameter is less than the anchor rod hole internal diameter of anchor rod dish, telescopic hole with the anchor rod passes the coaxial and equal that just passes the hole, the one end side that the cone was kept away from to the sleeve is equipped with a plurality of shell fragments along circumference evenly distributed, the upper end and the sleeve rigid coupling of shell fragment, each shell fragment is located same big end down's conical surface, and the lower extreme external diameter of each shell fragment place conical surface is greater than the anchor rod hole internal diameter of anchor rod dish, when the lower extreme of each shell fragment contacted with the sleeve, the diameter of the outside limit place circle of each shell fragment was less than the anchor rod hole internal diameter of anchor rod dish. According to the optimized scheme, the sleeve is arranged, so that the elastic sheet is convenient to arrange, and the function of improving the shearing resistance of the anchor rod at the position of the anchor rod hole is achieved; through the shell fragment that sets up, avoid the tray to drop downwards, easy to assemble to the alignment is realized to the tray to the convenience before screwing up the nut, has improved the installation effectiveness.

Preferably, the lower end of the elastic sheet is fixedly provided with a round ball which is in contact with the inner wall of the anchor rod disc, and the diameter of the round ball is larger than the thickness of the elastic sheet. This optimization scheme has reduced the frictional force between shell fragment and the stock dish inner wall through setting up the ball, has improved the alignment effect of tray.

As optimization, under the natural state, the axis included angle between the elastic sheet and the sleeve is 20-30 degrees. The angle setting of this optimization scheme plays at the shell fragment and prevents under the condition that the tray dropped, the deformation of shell fragment when having reduced the installation for it is more laborsaving to wear the sleeve to the stock downthehole time.

Preferably, the bottom disc, the cone and the sleeve are integrally formed, and the elastic sheet and the sleeve are fixed through welding. This optimization scheme's setting makes things convenient for the whole processing of tray, has guaranteed the holistic structural strength of tray moreover, with shell fragment and sleeve welding, makes the preparation more convenient.

The utility model has the beneficial effects that: the contact surface of the tray and the anchor rod disc is set to be a conical surface, and the centering is realized through the action of the conical surface, so that the stress effect of the anchor rod is provided; through setting up the shell fragment, when the tray installation, play the effect that prevents the tray and drop to through setting up the ball, make things convenient for the alignment of tray.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a state diagram of the present invention;

shown in the figure:

1. bottom disc, 2, stock pass the hole, 3, ball, 4, shell fragment, 5, cone, 6, spacing platform, 7, stock, 8, stock dish, 9, sleeve, 10, let the pressure ring, 11, nut.

Detailed Description

In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained by aiming at the supporting implementation mode of the top of the roadway.

An adjustable centre pallet for supporting a rock bolt as shown in figure 1 comprises a base disc 1, a cone 5 extending upwardly from the upper surface of the base disc, a sleeve 9 extending upwardly from the upper end of the cone, and a rock bolt passing hole 2 extending axially through the base disc and cone, the inner bore of the sleeve being coaxial and equal to the rock bolt passing hole.

The outer diameter of the upper end of the cone is smaller than the inner diameter of the anchor rod hole of the anchor rod disk, the outer diameter of the lower end of the cone is larger than the inner diameter of the anchor rod hole of the anchor rod disk, and a limiting table 6 is formed between the lower end of the cone and the excircle of the bottom disk. In actual installation, as shown in fig. 2, the upper end, i.e., the small diameter end, of the cone extends into the anchor rod hole of the anchor rod disk 8, and the lower end, i.e., the large diameter end, of the cone is located below the anchor rod hole of the anchor rod disk 8, so that the center adjustable tray is in line contact with the anchor rod disk.

Telescopic external diameter is less than the stock bore diameter of stock dish, and the one end side that the cone was kept away from to the sleeve is equipped with a plurality of shell fragments 4 along circumference evenly distributed, and the thickness of this embodiment shell fragment is 1~2mm, and the quantity of shell fragment is 3~ 6. The upper end and the sleeve rigid coupling of shell fragment, and the shell fragment downward sloping sets up, under natural state, shell fragment and telescopic axis contained angle are 20~30 degrees, each shell fragment is located same big-end-up's conical surface, and the lower extreme external diameter of each shell fragment place conical surface is greater than the stock hole internal diameter of stock dish, when the lower extreme of each shell fragment contacts with the sleeve, the diameter of the outside limit place circle of each shell fragment is less than the stock hole internal diameter of stock dish, conveniently pass the stock hole of stock dish after the shell fragment extrusion, the shell fragment passes behind the stock hole, resume deformation under self spring action.

As the optimization scheme, the lower extreme of this embodiment shell fragment sets firmly the ball 3 with the contact of stock dish inner wall, and the diameter of ball 3 is greater than the thickness of shell fragment 4, through setting up the ball, has reduced the area of contact with stock dish inner wall, makes things convenient for the alignment of tray, is convenient for simultaneously reduce the shell fragment pass through the stock dish when and the stock pore wall between the frictional resistance.

In order to reduce the processing degree of difficulty, improve the preparation efficiency, the bottom disc of this embodiment, cone and sleeve are integrated into one piece spare, through welded fastening between shell fragment and the sleeve.

During the installation of the adjustable center tray of this embodiment, as shown in fig. 2, be located anchor rod dish 8 and let between the clamping ring 10, it establishes on stock 7 to pass 2 covers of hole through the stock, the tray rebound in-process, each shell fragment progressively receives the pressure deformation under the guide effect of conical surface, in order to pass the anchor rod hole smoothly, the shell fragment is whole after passing through the anchor rod hole, resume deformation under self elastic action, the ball supports in anchor rod dish inner wall, the bottom disc is located the below of anchor rod dish, when screwing up nut 11, let the clamping ring progressively compress tightly with the tray, effect through the conical surface realizes the alignment.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a support adjustable center tray for stock which characterized in that: including bottom disc (1), upwards cone (5) that extend from the upper surface of bottom disc to and the stock that runs through bottom disc and cone along the axial passes hole (2), the upper end external diameter of cone is less than the stock downthehole diameter of stock dish, and the lower extreme external diameter of cone is greater than the stock downthehole diameter of stock dish, forms spacing platform (6) between the lower extreme of cone and the excircle of bottom disc.

2. The adjustable center pallet of claim 1, wherein: still include certainly sleeve (9) that the upper end of cone upwards extends, telescopic external diameter is less than the anchor rod hole internal diameter of anchor rod dish, telescopic hole with the stock passes the hole coaxial and equals, and the one end side that the cone was kept away from to the sleeve is equipped with a plurality of shell fragment (4) along circumference evenly distributed, the upper end and the sleeve rigid coupling of shell fragment, each shell fragment is located the conical surface big end down on same, and the lower extreme external diameter of each shell fragment place conical surface is greater than the anchor rod hole internal diameter of anchor rod dish, and when the lower extreme of each shell fragment contacted with the sleeve, the diameter of the outside limit place circle of each shell fragment was less than the anchor rod hole internal diameter of anchor rod dish.

3. The adjustable center pallet of claim 2, wherein: the lower end of the elastic sheet is fixedly provided with a round ball (3) which is contacted with the inner wall of the anchor rod disc, and the diameter of the round ball (3) is larger than the thickness of the elastic sheet (4).

4. The adjustable center pallet of claim 2, wherein: under the natural state, the axis included angle between the elastic sheet and the sleeve is 20-30 degrees.

5. The adjustable center pallet of claim 2, wherein: the bottom disc, the cone and the sleeve are integrally formed, and the elastic sheet is fixed with the sleeve through welding.