CN2177222Y

CN2177222Y - Blasting hole blocking plug

Info

Publication number: CN2177222Y
Application number: CN 93217189
Authority: CN
Inventors: 吴元明
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-30
Filing date: 1993-06-30
Publication date: 1994-09-14
Anticipated expiration: 2003-06-30

Abstract

The utility model relates to a blasting hole blocking plug, which is device which is suitable for mass production and has convenient operation, and is made from hard rigid materials such as ceramics, etc., for blocking powder loading mouth in blasting. The device is combined by a piston 1 whose diameter is in clearance fit with a powder loading hole, and a plurality of slips 2 which hold on the piston handle and is capable of axially moving definite distance; the piston 1 is provided with a handle; the longitudinal section of the slips 2 is in wedge-shaped. The device realizes the blocking function by the friction of the slips and the hole wall in the process of blasting in holes, and is capable of being used in series for enhancing reliability. Using the blocking plug is helpful to enhance the quality and the efficiency of blasting operation.

Description

Blasting hole blocking plug

The utility model relates to a kind of device that blasting engineering stops up medicine containing opening that is used for, especially for the blocking device of circular hole medicine containing opening in the blasting engineering.

Known is to smash with the system of manually mixing " stemming ", mortar, concrete or loess class bulk material to fill out in the on-the-spot method of stopping up medicine containing opening of explosion.Exist operating efficiency low in various degree, be difficult to strict controlled blasting quality, can't stop " chongtian mortar " and miso-fire takes place to be difficult to shortcomings such as eliminating.

That the purpose of this utility model is to provide is a kind of moulding, that be convenient to produce in batches, use blocking device comparatively easily.

The alleged blast hole plugging bolt of the utility model is to finish the task of being proposed in the following manner:

Diameter and powder charge hole be piston matched in clearance, that have handle and several fill the span of a man's arms on piston handle, along the handle face can move axially certain distance, the vertical section is the device that the slips of wedge type combines.This installs in its slips comparatively smooth with the piston handle contact-making surface, and slips is then comparatively coarse or be carved with trend and axial vertical bar shaped or spiral shell shape decorative pattern towards the outer surface of hole wall.Grasp in principle the slips outer surface with the issuable confficient of static friction of the hole wall of meeting be greater than the confficient of static friction of slips inner surface and piston handle, and satisfy slips outer surface and the institute angle of friction that converses of the issuable coefficient of friction of the hole wall of meeting greater than the slips surfaces externally and internally with angle α/2 of the conplane bus of piston center line, band handle piston and handle outer to enclose slips be basic composition of the present utility model.Said apparatus is positioned in the powder charge hole, blast process is initial, because of piston-top surface is subjected to the effect of blast impulse pressure piston is moved to slips one side, and slips self inertia power and with the effect of hole wall frictional force under only take place small or axial displacement do not take place, the relative displacement that produces because of blast between piston and handle and the slips, make slips to radially expansion, hole wall then limits this expansion, thereby the axial thrust that the hole implode acts on piston changes the radially normal pressure of slips to hole wall in the relative displacement trend of piston and handle and slips.When slips produces frictional force and is enough to resist the axial thrust that piston bears produces because of blast the pressure of hole wall (self-locking), along with the continuation of blast process when the hole wall that contacts with slips is subjected to displacement, this device has just been finished setting of task.

The utility model can accompanying drawing in listed four embodiment further specify.

Fig. 1 is the vertical profile schematic diagram that four embodiment had, can illustrate by axis along the A-A line the utility model design feature.

Fig. 2 is the generalized section of embodiment one at B-B place cross section.

Fig. 3 is the generalized section of embodiment two at B-B place cross section.

Fig. 4 is the generalized section of embodiment three at B-B place cross section.

Fig. 5 is the generalized section of embodiment four at B-B place cross section.

Fig. 6 is that embodiment four is near the piston handle afterbody cross-sectional profile schematic diagram parallel with cross section shown in Figure 5.

Fig. 7 is the schematic diagram of two plugging bolt tandem workings.

The represented embodiment one of Fig. 1 and Fig. 2 is that a body diameter is slightly less than the piston that can move freely 1 of powder charge hole, band handle and two cross sections and is ring and lacks shape in the powder charge hole, and the slips 2 that the longitudinal section is wedge shape constrains in together composite set by two or more cushion rubbers 3.Band handle piston 1 made by harder rigid material, and the center is provided with leads blast hole 5, and the piston body outer surface is the face of cylinder, and shank is cone shape, and the handle tail has boss and the more smooth global facility of the handle conical surface.Slips 2 is that coarse relatively and curvature of the outer surface made by harder rigid material and hole wall to be laid match, and corresponding curved surface matches on the smooth relatively and curvature of inner surface and the piston 1 vertebra handle, and afterbody is provided with watt shape parts of Bearing score breach 4.Two slips 2 are filled the span of a man's arms in opposite directions on the vertebra handle of piston 1, under the constraint of cushion rubber 3, and the certain axial distance of slippage relatively on the vertebra face of piston handle.Slips outer surface bus remains parallel with the piston body face of cylinder bus when mobile.Cushion rubber 3 be elasticity preferably, give in the groove that stays around the slips outer surface, piston 1 and slips 2 are strapped in together attachment, do not have practical function to realizing the task that the utility model is finished, but helpful to commercialization of the present utility model.

The embodiment two that Fig. 1 and Fig. 3 are represented, identical with the above embodiments one essential structure, difference only be the to fill the span of a man's arms slips 2 of vertebra handle is three.

The embodiment three that Fig. 1 and Fig. 4 are represented, close with the above embodiments one essential structure, the main distinction is that the handle of present embodiment piston 1 and the contact-making surface of slips 2 are plane and the variation that causes the member geometry thus.

The represented embodiment four of Fig. 1 and Fig. 5, Fig. 6 is similar to the foregoing description one essential structure, and its difference is to combine the main distinction of embodiment two, three and embodiment one.

More than the general character of listed four embodiment be that as shown in Figure 1 Fig. 1 is the schematic diagram that the utility model operation principle and design feature can be described.

The cone angle of the α of angle shown in Fig. 1 cone handle in embodiment one, two, the sliding-contact plane that is piston handle and slips in embodiment three, four is with respect to two times of the formed angle of piston axis.In other words, promptly on the piston handle part and the piston axis of outer surface or outer surface be certain angle [alpha]/2.For making slips outer surface bus and piston center line opposing parallel, same, the center line of slips inner surface and the center line of outer surface also are certain angle [alpha]/2.α angle span is advisable between 18 degree at 10 degree.

Among Fig. 1, when moving axially before and after in the powder charge hole for plugging bolt in the design, make piston 1 and slips 2 servo-actuateds mutually, piston 1 handle tail is provided with the boss of outstanding outer surface, and slips 2 inner surfaces that adapt therewith leave the groove that adapts with piston handle tail boss.

Among Fig. 1, slips 2 tail end outer surfaces leave Bearing score breach 4, are in order to get rid of miso-fire and to cancel explosion time, can relatively easily pulling out plugging bolt and the ad hoc breach that can plug in instrument from the powder charge hole.

Among Fig. 1, the piston center be provided with piston concentric, connect, what there was a chamfering at two ends leads blast hole 5.Diameter is generally got 6mm and can be satisfied and pass detonator, loading wire of electric detonator, and line styles such as fuse cord, primacord are ignited the needs of equipment.

Top land has the pit that can hold handle tail and boss and makes and stop up the post use of connect among Fig. 1, is not difficult to find out that in conjunction with Fig. 7 afterwards the bolt piston wants to withstand preceding bolt slips, and must stay this pit is that preceding bolt piston tail gives spacing.

Among Fig. 1, conveniently use and don't influence function for piston and some slips can be connected together, with elasticity preferably several cushion rubbers 3 piston and slips are strapped in together.

Fig. 7 is the schematic diagram of two plugging bolt tandem workings, be applicable to that single plugging bolt can not satisfy stemming length in the blasting engineering, hole wall is more smooth or influential frictional force precipitate so that hole wall and the less situation of slips coefficient of friction, tandem working also is applicable to make spacer in the hole during a plurality of cartridge bag layering explosion between cartridge bag.The reliability that can ensure fully that blast hole stops up is used in several plugging bolt series connection.

The harder rigid material of making the utility model piston 1 and slips 2 can be engineering plastics, pottery, glass, cast stone, cast iron, also can be that cement, resin etc. add breeze and mould system, and volume the greater can also be the clay burned product.Diameter commonly used is the following person of 100mm, and the designer recommends to use pottery or glassware.

Embodiment one, three is applicable to the obstruction in small-bore powder charge hole, implements two, four and is applicable to the powder charge hole that bore is big slightly.

Using the utility model, to have an operation than blast hole such as obstruction such as " stemming " the bulk cargo class of etc.ing easy, good reliability has than strong adaptability mechanical work, is convenient to improve bursting work quality and operating efficiency, cut the waste, and the advantages such as safety coefficient of cancelling bursting work after the raising powder charge.

Use the utility model and stop up the ignition failure phenomenon generation that the powder charge hole can also prevent effectively that misoperation common in the bulk cargo plug from causing.

Claims

1, a kind of blast hole plugging bolt is characterized in that: this plugging bolt be a diameter and powder charge hole be matched in clearance, have the piston of handle and several fill the span of a man's arms on piston handle, along the handle face can move axially certain distance, the vertical section is the device that the slips of wedge type combines.

2,, it is characterized in that a part and the piston axis of outer surface on the piston handle or outer surface is certain angle [alpha]/2 by the described blast hole plugging bolt of claim 1.

3, by the described blast hole plugging bolt of claim 1, it is characterized in that the center line of slips inner surface and the center line of outer surface are certain angle [alpha]/2.

4,, it is characterized in that α angle span is between 10 degree are spent to 18 by claim 2 or the described blast hole plugging bolt of claim 3.

5, stop up by the described blast hole of claim 1, it is characterized in that the piston handle afterbody has the boss of outstanding outer surface.

6, by claim 1 or the described blast hole plugging bolt of claim 5, it is characterized in that top land has the pit that can hold handle tail and boss, make the plugging bolt use of connecting.

7,, it is characterized in that the blast hole of leading that the piston center is provided with piston is concentric, that connect, there is chamfering at two ends by claim 1 or the described blast hole plugging bolt of claim 5.

8, by claim 1 or the described blast hole plugging bolt of claim 5, the tail end outer surface that it is characterized in that its slips leaves the Bearing score breach and inner surface leaves the groove that adapts with piston handle tail boss.

9, by the described blast hole plugging bolt of claim 1, it is characterized in that this device with elasticity preferably several cushion rubbers piston and slips are strapped in together.