CN1194888A

CN1194888A - Concrete spraying equipment

Info

Publication number: CN1194888A
Application number: CN97101700A
Authority: CN
Inventors: 颜曙光
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-31
Filing date: 1997-03-31
Publication date: 1998-10-07

Abstract

A spray apparatus of concrete for engineering construction is composed of proportioning unit, stirrer, delivering unit, stationary discharge tube, pneumatic sprayer, pneumatic channel system and walking unit, and features use of pneumatic delivering. Before gas and solid are mixed, the material is acted by gravity and attraction of air jet to pass through throat at high speed and increased two-phase flow momentum transform. In the stationary discharge tube screw delivery is used to reduce friction and energy consumption. Its advantages are low abrasion and energy consumption, no blocking and reverse spray, and long service life.

Description

Concrete spraying equipment

The invention belongs to a kind of concrete spraying equipment that is applied to engineering construction fields such as colliery, railway, tunnel, building.

The rotator type concrete sprayer of extensive use all exists rotor part in present concrete engineering construction.These parts itself are heavier, carrying a plurality of material bodies to be sprayed again, rotate under the state that is rubbed in many places, and it only can feed, and energy consumption can not done any contribution to the acceleration and the spray feed of material.

The concrete sprayer of no rotor is all made great efforts to develop in the home and abroad, does many work.Assimilate the PX-4 type screw spraying machine developed on the basis of external achievement (Chinese patent application numbers 87 as domestic representative coal research place, Henan Province, 210,829, the applying date 87,07,21), the principle that is adopted all is that malleation is pushed injection, send in the taper gas-mixing chamber of convergent Gu be about to compressed air, re-use spiral and force to push, the interior material of cavity is squeezed from cone head part spray into feeding pipe.Because it is very low that the flow velocity of pipeline opening is clamp-oned in the material spray, easily stops up at mouth of pipe place, cause contrary spray.In addition, forced to push feeding to pressure chamber by spiral, the helical duct abrasion is serious, and energy consumption is big.So this equipment power consumption, gas consumption are all bigger, lack application prospect.

Domestic nearest appearance a kind of supporting with the rotator type concrete sprayer, function ratio is more complete can be described as the concrete spraying equipment of " Set Type ", its ejection function is still born by rotor spraying machine, is equipped with screw mixer feed for it, forms to stir and sprays unit.For accurately controlling the material match ratio, it adopts several component hoppers to lay along the axis span of tilting screw, and it is illustrated as Fig. 5.Because this kind laid the mixing mixing time difference of its material, is difficult to mix, and will have influence on construction quality, in addition in abominable job site, material to be packed in the quite high-order feeding mouth by manpower, its labour intensity is also very big.

The objective of the invention is to overcome and solve the above problem that exists in the prior art, provide a kind of and have designs simplification, the abrasion part is few, is convenient to operating maintenance, long service life and efficient, energy-conservation concrete spraying equipment.

This equipment is by proportioner, mixed stirring device, device for transporting objects, gas jet device, static material blanking tube, air path system and running part basic composition.After realizing that Gu the key of above-mentioned purpose is to abandon present first gas-mixing, rely on the operation principle of screw extrusion material spray again, and take the gas jet principle, rely on the effect of entrainmenting of jet, solid-phase material brought in diffusion pipeline section and the conveying pipeline carry out momentum-exchange, Gu realize gas-mixing.In order to improve the speed of material, be provided with static blanking pipeline vertical or that tilt in addition by throat.The upper end of this pipeline is provided with feeding device, the lower end is provided with gas and penetrates spout.Material falls in static material blanking tube or landing and mixing with Gas Jet by throat at a high speed under the double action of gravity that natural drop brings and jet entrainment.Like this, increase by throat unit interval logistics capacity, solid make bring about the desired sensation-the momentum conversion of two-phase flow strengthens, and improved ejection efficiency, also is difficult for generation and propels at present because of the spout part logistics speed is too low, results in blockage, and leads to contrary phenomenon of spraying.

Application gas is penetrated and is entrainmented, static material blanking tube internal pressure is a little less than atmospheric pressure, at this moment, conveying worm does not need " pressure is pushed ", only play to mix and stir and control logistics rate action, therefore, the helical duct friction reduces, energy consumption reduces, and the present invention adds that with the pipe that falls the gas injection device has substituted rotor spraying machine in fact.

The speed that material obtains in static material blanking tube is relevant with natural drop H, so generally by vertically being set to.For the minority particular design, also tiltable, the inclination angle is big as far as possible, to reduce the gas consumption amount, generally answers θ＞20 ° to see Fig. 1.

Gas is penetrated shower nozzle except being arranged on the larynx center as taking central-injection among Fig. 1, also available annular nozzle takes Zhou Bianhuan to penetrate, and so both can avoid central gas to penetrate the abrasion that brings because of the jet wall attachment effect, also increase the flow section of throat, reduced the possibility of stopping up.

The component hopper of equipment can be concentrated the low order end that is located at the tilting screw passage, both can guarantee that each component material incorporation time is basic identical, and it is mixed, and can reduce working strength of workers again.Can form kind according to material, quantity is required, adopt a plurality of can be even solid or dismountable lattice or split size hopper, section configuration can be varied as

Or or floral leaf shape or the like, each disjunctor divide bucket own together bucket at the bottom of, again by end bucket to the low level feeding mouth of helical duct by the adding batch that shakes.

The job site does not wish that because of containing the explosive methane gas power delivery arrives working face under the coal mine, so power can be provided to lower danger by wind motor or hydraulic motor.

The helical feed mode that tilts, if long, the too high meeting of helical duct brings transportation and maintenance inconvenient, if a hinge supporting-point that multi pack is put and suitable position is provided with the adjustable tilt angle in the middle is set between its low level portion and plant bottom case, so that can be, the high-order bit be fallen be convenient to the correct position that transports and overhaul as common stapler.

Construction environment for " going up a hill " or " going down the hill ", in order to keep the vertical of static material blanking tube, the big as far as possible gravitation energy that utilizes, static material blanking tube and connecting of conveyer can be taked the continuously adjustable mode of angle on the one hand, as cut with scissors connection, and, guarantee the sealing that pipe can turn to the upright position and keeps the logistics corridor appropriateness with this with the flexible steel in flat section tubing sealing-in; If divide the pipeline section combination to connect, the length of static material blanking tube can be regulated according to on-the-spot needs, also is convenient to pull down maintenance on the other hand.Consider that the helical feed discharge gate is advisable with rectangle, and gas is penetrated aditus laryngis and is advisable with circle, so divide in the pipeline section square one circular section transforming section is arranged.Consider the eliminating of obstruction, the following discharge gate that divides pipeline section can be provided with closure.

Below in conjunction with accompanying drawing the present invention and several embodiment, prior art being done one describes.

Fig. 1 is the schematic diagram at gas jet position, and θ is the minimum angle of static material blanking tube center line and horizontal plane, and H is the natural drop between static material blanking tube upper end and the throat's horizontal plane.

Fig. 2 is one of embodiment of the invention, the Set Type concrete spraying equipment

Fig. 3 is two of the embodiment of the invention, the small-size concrete spraying machine

Fig. 4 is three of the embodiment of the invention, another kind of small-size concrete spraying machine

Fig. 5 is the spiral concrete sprayer of PX-4 type

Fig. 6 is a HPJ type concrete sprayer group schematic diagram

Among the above-mentioned figure, 1 gas injection device, 2 static blanking pipeline sections, 3 static material blanking tube variable cross-section sections, 4 static material blanking tube undergauge sections, 5 motor, 6 decelerators, 7 agitating augers, 8 are threaded into hopper, 9 component hoppers, 10 flexible tube segment, 11 articulated mountings, 12 adjustable supports, 13 hold together to expect agitator, 14 conveying pipelines, 15 stock column annular seal spaces, 16 eddy flow accelerators, 17 thrust spirals, 18, frame, 19 rotator type concrete sprayers

Claims

1. a concrete spraying equipment of being made up of batching, mixing, conveying, injection apparatus, air path system and running part is characterized in that injection apparatus application gas jet current principle, Gu the effect of entrainmenting of being penetrated by gas mixes gas-two-phase.

2. concrete spraying equipment according to claim 1 is characterized in that carrying and adopts spiral feeding device and be provided with static blanking pipeline below discharge gate.

3. concrete spraying equipment according to claim 1 is characterized in that batching adopts a plurality of component hoppers, and each component hopper all places on the end bucket, leaks material by end bucket to conveying device.

4. concrete spraying equipment according to claim 1 is characterized in that its gas penetrates shower nozzle and adopt annular nozzle or center shower nozzle.

5. concrete spraying equipment according to claim 1 is characterized in that its conveying device takes to be obliquely installed, and is provided with and makes its angle of inclination adjustable continuously and keep stable hinge connection and supporting arrangement.

6. concrete spraying equipment according to claim 2 is characterized in that the power of conveying worm is provided by pneumatic or fluid motor.

7. concrete spraying equipment according to claim 2 is characterized in that connecting for the continuously adjustable hinge of the two angle between static material blanking tube and conveying device connects.

8. concrete spraying equipment according to claim 2 is characterized in that static material blanking tube is connected by the transformable minute pipeline section in detachable and cross section to form.

9. concrete spraying equipment according to claim 2 is characterized in that the bottom of static material blanking tube is provided with the discharge gate of with closure.

10. concrete spraying equipment according to claim 2, the feeding end that it is characterized in that conveying worm are provided with the coaxial agitating device that radially holds together to expect.