CN108397212A - A kind of concrete spray head and application method - Google Patents
A kind of concrete spray head and application method Download PDFInfo
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- CN108397212A CN108397212A CN201810136102.4A CN201810136102A CN108397212A CN 108397212 A CN108397212 A CN 108397212A CN 201810136102 A CN201810136102 A CN 201810136102A CN 108397212 A CN108397212 A CN 108397212A
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- 239000004567 concrete Substances 0.000 title claims abstract description 79
- 239000007921 spray Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 239000007924 injection Substances 0.000 abstract description 18
- 238000002347 injection Methods 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004568 cement Substances 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract description 4
- 229920002994 synthetic fiber Polymers 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 239000011378 shotcrete Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention provides a kind of concrete spray head, including double swivel nozzle, accelerator regulation ring, derailing switch, the accelerator regulation ring, derailing switch are located at double swivel nozzle front end, it is respectively used to adjust the mixing of material spray and water and controls the switch of double swivel nozzle, double swivel nozzle includes feed inlet respectively independence but the first nozzle and the second nozzle of discharge port connection.The injection that the concrete spray head passes through double swivel nozzle, and the method for regulation ring is arranged in the use in conjunction with accelerator regulation ring and the presetting period according to accelerator, environmental benefit is notable, under the premise of without upgrading capital equipment, the effect for saving cement, sand material, water can be met by only increasing a patent equipment, from the injection environment for realizing dust-free operation.Meanwhile nozzle inner walls increase a kind of synthetic material, can prevent plug nozzle.In addition, the synthetic material is arranged in conveyance conduit according to fed distance, can play the role of preventing plugging.It avoids personal injury and clears up the time of pipeline, substantially increase the construction efficiency of the technique and the green section material effect of operation.
Description
Technical field
The present invention relates to a kind of concrete injection devices, more particularly, to a kind of concrete spray head and application method.
Background technology
Gunite concrete is both a kind of novel supporting construction and a kind of new construction technology.It is to use concrete
Spraying machine is ejected on palisades surface, and consolidate rapidly by certain combination process by mixed with the pea gravel concreten of accelerator
At one layer of supporting construction, to play support action to country rock.
Compared with traditional cast-in-place concrete, gunite concrete does not need formwork erection and vibrates, but at a high speed, even by mixture
It is sprayed onto continuously by spray plane, impact, extruding form closely knit concrete.Gunite concrete is on physics composition and structure and common
Concrete is almost the same, but it has many advantages, such as that convenient, fast for construction, overall cost is cheap, is widely used to build at present
Object repairing, lining cutting and reinforcement, in the engineerings such as side slope and surface gib, especially section is relatively thin, the prodigious place of area,
It can be effectively saved the construction time using gunite concrete.
Concrete ejection technology is to provide kinetic energy by concrete sprayer using compressed air and pass through spray through piping
Concrete ejection on by spray plane, is made concrete condense a kind of technology of hardening rapidly by mouth.
Existing concrete spray head, the aperture of nozzle are single hole, inside there is no mixed flow function.In addition, hole for water spraying exists
It is inadequate for the time of fusion of accelerator and water near nozzle and shorter with the reaction time of cement.Accelerator cannot be met
Requirement.
Invention content
The present invention provides a kind of concrete spray head and application methods, solve concrete spray head and carry out mixed flow to material spray
Problem, it is described that its technical solution is as follows：
A kind of concrete spray head, including double swivel nozzle, accelerator regulation ring, derailing switch, the accelerator regulation ring, switch
Device is located at double swivel nozzle front end, is respectively used to adjust the mixing of material spray and water and controls the switch of double swivel nozzle, double swivel nozzle
Including feed inlet the first nozzle and the second nozzle that respectively independence but discharge port are connected to.
First nozzle and the second nozzle all include inlet port and outlet port, and the waist between inlet port and outlet port
Portion is connected to, and connected surface is formed, until discharge port one end.
The shape size of first nozzle and the second nozzle is identical, and two nozzles use sandwich.
A diameter of 40mm of the feed inlet of first nozzle and the second nozzle, a diameter of 150mm of discharge port, feed inlet
To the long 400mm of waist of discharge port, the distance of center circle of the discharge port of the first nozzle and the second nozzle is 90mm.
Double swivel nozzle front end is provided with group switch, and a feed inlet is divided into two dischargings for being connected to double swivel nozzle
Mouthful, and the control terminal of unlatching or stopping is provided with to each discharge port；It is additionally provided with multiple control handles on group switch, uses
In remote control wind pressure respectively, the metering of accelerator and water.
Installation accelerator regulation ring, derailing switch in the front of double swivel nozzle to spraying machine；In liquid accelerating agent to high pressure water
Liquid accelerating agent feedway, the volume for controlling liquid accelerating agent are installed between pipe；Air enters spraying machine by air hose,
Compressed air is formed in spraying machine, concrete mix is transported to concrete spray head by spraying machine by wind pressure by conveying hose
Place, liquid accelerating agent supply machine by liquid accelerating agent by being mixed with water in accelerator mixing tube force feed to high-pressure water pipe, and then one
It is transported to concrete spray head with by high-pressure water pipe, is sprayed after being mixed with concrete mix.
Distance of the accelerator regulation ring away from double swivel nozzle is adjusted according to the presetting period of accelerator.
Accelerator regulation ring is used to adjust the proportionate relationship of concrete mix, accelerator and water.
The volume of accelerator is the 1%-3% of concrete mix quality.
Further, when spraying tunnel side wall, volume 1%；When spraying vault, volume 2%.
The concrete spray head combines the use of accelerator regulation ring by the injection of double swivel nozzle, and environmental benefit is aobvious
It writes, under the premise of without upgrading capital equipment, saving cement, sand material, water can be met by only increasing a patent equipment
Effect, from realize dust-free operation injection environment.
Speed by comparing single nozzle can be seen that jet velocity distribution is similar with pressure-plotting, go out in jet stream
Two strands of jet streams gradually merge at mouthful, since the fusion of two strands of jet streams and interference effect, maximum jet impact force are small at the scope of attack
In single nozzle, hitting power constantly reduces with jet diameter, and hitting power distribution gradient reduces, and hitting power more uniformly spreads and beats
It hits face and is much larger than single nozzle.
Description of the drawings
Fig. 1 is the use schematic diagram that concrete spray head is sprayed in the present invention；
Fig. 2 is the structural schematic diagram of the double swivel nozzle in concrete spray head in the present invention；
Fig. 3 is double swivel nozzle VELOCITY DISTRIBUTION cloud atlas；
Fig. 4 is double swivel nozzle VELOCITY DISTRIBUTION polar plot；
Fig. 5 is double swivel nozzle strike surface pressure cloud charts；
Fig. 6 is the schematic diagram of double swivel nozzle；
Fig. 7 is the schematic diagram of double swivel nozzle embodiment.
Specific implementation mode
The present invention includes double swivel nozzle, accelerator regulation ring, derailing switch, and accelerator regulation ring is referred to as connector.
The accelerator regulation ring, derailing switch are located at double swivel nozzle front end, are respectively used to adjust the mixing of material spray and water and control is double
The switch of head nozzle, double swivel nozzle include feed inlet respectively independence but the first nozzle and the second nozzle of discharge port connection.
In use, as shown in Figure 1, in the front of double swivel nozzle to spraying machine installation accelerator regulation ring, derailing switch；In liquid
State accelerator between high-pressure water pipe install liquid accelerating agent feedway, the volume for controlling liquid accelerating agent；Air is logical
It crosses air hose and enters spraying machine, adjuster is set in front of spraying machine, form compressed air in spraying machine, spraying machine will by wind pressure
Concrete mix is transported to concrete spray head by conveying hose, and liquid accelerating agent supplies machine by liquid accelerating agent by accelerator
It is mixed with water in mixing tube force feed to high-pressure water pipe, concrete spray head is then transported to by high-pressure water pipe together, with concrete
It is sprayed after mix mixing.
As shown in Figure 2 and Figure 6, first nozzle 1 is identical with the shape size of the second nozzle 2.First nozzle and
Second nozzle all includes feed inlet 3 and discharge port 4, and 5, the waist between feed inlet 3 and discharge port 4 is connected to, the company of being formed
Logical face, until discharge port one end.A diameter of 40mm of the feed inlet 3 of first nozzle, 1 and second nozzle 2, discharge port 4 it is straight
Diameter is 150mm, the 5 long 400mm of waist of feed inlet to discharge port, and the distance of center circle of the discharge port of the first nozzle and the second nozzle is
90mm。
As the design of Fig. 3 to Fig. 5 double swivel nozzles can improve effluxvelocity 1.5m/S.Surface pressure maximum is hit to improve
0.5atm.Core strike area doubles.To effectively raise the ejection efficiency of gunite concrete.Simultaneously further
Improve the effect of tunnel support.
It is efficient using having in order to make double swivel nozzle play the role of, it changes and the practical presetting period according to accelerator is needed to be arranged
Regulation ring (connector).Regulation ring (connector) needs be adjusted according to the presetting period of accelerator, by the presetting period come
The distance of regulation ring (connector) away from double swivel nozzle is set.Adjuster plays the role of accurately playing accelerator function.
Setting can make liquid accelerating agent be not in anxious coagulation phenomena in this way, mix in concrete, concrete can be made to have viscous
Property, pulp, such coarse aggregate can be squeezed into course of injection in mortar, and the rebound of coarse aggregate is reduced.After reducing concrete
The loss of phase intensity.
The good rapid hardening effect of liquid accelerating agent can be played after operating in this way, can accomplish that volume is concrete quality
1%-3%, presetting period are in 2min or so, and final setting time loses within 10% in 4min or so, later strength, has good
Good rapid hardening effect.When spraying tunnel side wall, volume is 1%, when spraying vault, generally 2%, and 3% is not exceeded,
Because accelerator volume is bigger, late strength of concrete decaying is more serious.
As shown in fig. 7, in embodiment, the improvement in structure is carried out to nozzle according to actual conditions, increases synthesis first
Switch 7, import are attached with expects pipe 6, and outlet is connected by connecting tube with double swivel nozzle, and the group switch 7 will be whole
Charging be divided into two dischargings, and two dischargings are controlled, are provided with control terminal 71 and control terminal 72, the control terminal
71 and control terminal 72 be both provided with one rotation catch, rotation catch include the rotating part of upper end and the catch of lower end, the gear
The shape of piece and discharge port is coincide, and the corresponding rotation catch of swivel nozzle can block the circulation of material spray.
When the corresponding nozzle of control is no longer sprayed, corresponding rotation catch only need to be rotated, blocks the entrance of material spray
, and rotate catch upper end and be provided with stuck structure, rotation catch upper end is blocked when stopping injection so that it cannot be moved
It is dynamic, to fix.Folding card rod may be used in the stuck structure, is lied down after folding in the top of group switch, is erected
It erects and to prevent rotation catch from being rotated.It is usually folded in the top of group switch 7 in this way, needs fixed rotation catch
When, then it erects, prevents from rotation catch and rotated.Combination dismounting may be implemented in the present invention in this way, realizes single injector
With being switched fast for twin-jet nozzle, meet the fining construction of construction operating mode；When being used alone：Close a spray in twin-jet nozzle
Mouthful.When needing double sprays, open simultaneously.
Further, it is also possible to which multiple control handles 73 are arranged on group switch 7, control handle 73 can control remote control
Wind pressure, the metering of accelerator and water may be used wireless or electrical connection and controlled.
On the first nozzle 1 and the second nozzle 2, using sandwich, it is provided with nozzle interlayer 8, the interlayer is by turning
Ring 9 is fixed on double swivel nozzle, once nozzle blocks, then by rotating change 9, is unclamped interlayer 8, can be dredged, be played
Prevent the effect of plug nozzle.
Meanwhile nozzle inner walls increase a kind of synthetic material, can prevent plug nozzle.In addition, being set according to fed distance
The synthetic material is set in conveyance conduit, can play the role of preventing plugging.Avoid personal injury and clear up pipeline when
Between, substantially increase the construction efficiency of the technique and the green section material effect of operation.
It is carried out in such a way that segmentation, fragment, layering progress are bottom-up when injection, section length is not preferably greater than 6m.Spray
First low-lying place is substantially sprayed when penetrating and is put down, then sequence from low to uper part layering, reciprocal injection.
When sectional ejecting, last time should reserve inclined-plane when spraying, surface width, which is 250mm or so, to be advisable, and be answered before injection next time
Sand, stone are floated with cleaning and are moistening not ponding state.
Fragment injection simultaneously will first be sprayed concrete between steelframe and wall surface from bottom to top, then spray concrete between two steelframes.
Abutment wall pneumatically placed concrete should upwards be sprayed since foundation, make rebound that will not entrain into last spray-up.
When layering injection, later layer should carry out before preceding layer condenses, and be carried out with reference to the method for construction joint after final set, if eventually
When being sprayed again after solidifying 1h, first spray-up surface should be cleaned with geomantic omen.The thickness of pneumatically placed concrete is not slid with pneumatically placed concrete
Do not fall for degree, the cohesive force and cohesiveness of pneumatically placed concrete can neither be influenced because thickness is too big, can not be too thin and increase back
Bullet amount.In 7~10cm, arch is controlled in 5~6cm gunite concrete thickness control of abutment wall, and keeps jetting thickness uniform.
When top jet concrete, to avoid generating degeneration phenomenon, interval time is preferably 2~4h twice.Jet thickness is to spray coagulation
Soil does not slide not fall and is advisable, i.e., cannot answer the excessive influence cohesive force of thickness, can not be too thin and cause rebound amount big.
Jet velocity is appropriate, ensures the closely knit performance of concrete.Wind pressure is excessive, and jet velocity is also excessive, springback capacity
It is bigger；
Jet velocity is appropriate, in favor of coagulation soil compaction.Wind pressure is excessive, and jet velocity increases, and rebound increases；Wind pressure
Too small, speed is also just small, and pressure is small to be unfavorable for concrete compaction, to influence the intensity and anti-permeability performance of concrete.Therefore exist
It is noted that observation wind pressure could start to operate after starting wind pressure reaches 0.5MPa after booting, and wind is adjusted according to nozzle discharging situation
Pressure.General work wind pressure：0.3~0.5MPa of abutment wall, 0.4~0.65MPa of arch.
Nozzle and suitable distance is kept between by spray plane.1.2m or so is advisable, and spray angle is as close possible to 90 degree, so as to obtain
Obtain maximum compacting and minimum rebound.Nozzle with by spray plane spacing be preferably 1.5~2.0m；Nozzle should continuously, slowly be made laterally to go in ring
Mobile, a circle pressure half-turn sprays the annular ring drawn by hand, laterally 40~60cm, high 15~20cm；If by spray plane by steelframe, steel
, can be by nozzle slightly deflection when muscle net covers, but it is not preferably less than 70 °.If nozzle and the angular dimension by spray plane, can form mixed
Solidifying local product material produces rough waveform spray plane, increases springback capacity, influence the matter of pneumatically placed concrete by the rolling on spray plane
Amount.
Nozzle should continuously, slowly make transverse annular movement, and nozzle is spinned shape movement perpendicular to spray plane, and rotation is directly about
300mm or so.When such as being there is reinforcing bar covering to block by spray plane, nozzle can suitably be tilted, sprayed not less than 70 degree.Construction
Well-ventilated is wanted in region, and lighting apparatus is perfect, without supernumerary and equipment.
Running check spraying machine discharging elbow, delivery pipe and pipe joint, problematic timely processing are wanted when injection.Pipeline is stifled
Host must be first closed when plug, then is solved the problems, such as.
Host should be first closed after the completion of injection, then and is closed in metering pump, vibrating head, air-valve, then cleaning machine, pipeline residual
Object.
According to the accelerator presetting period that producer provides, the installation site of mixer is determined.It is ready for once being sprayed
Enter water and dedicated liquid accelerator, is mixed with concrete.
It needs to carry out surface evening after injection, gunite concrete surface be modified, it is ensured that concrete structure is strong
Degree and durability, but while constructing must not pay attention to and influence between gunite concrete and reinforcing bar or between gunite concrete and base material
Bonding, make to generate crack in concrete.(15~20min after general injection) will be outer extra with floating rule after concrete initial set
Material is cleared up, then levelling with whitewashing or plastering slurry again.
The sand factor of gunite concrete is high, and cement consumption is also relatively more and mixed with accelerator, and contraction distortion must
Concrete perfusion is big.Should be to carry out injection water curing after gunite concrete final set 2h, curing time must not be less than 14d.Teletostage
The temperature in construction injection concrete work area must not be less than+5 DEG C, and temperature when mix carries out spraying machine cannot be below+5 DEG C,
Temperature is less than+5 DEG C of maintenances that must not sprinkle water.
Speed by comparing single nozzle can be seen that jet velocity distribution is similar with pressure-plotting, go out in jet stream
Two strands of jet streams gradually merge at mouthful, since the fusion of two strands of jet streams and interference effect, maximum jet impact force are small at the scope of attack
In single nozzle, hitting power constantly reduces with jet diameter, and hitting power distribution gradient reduces, and hitting power more uniformly spreads and beats
It hits face and is much larger than single nozzle.
Claims (10)
1. a kind of concrete spray head, it is characterised in that：Including double swivel nozzle, accelerator regulation ring, derailing switch, the accelerator tune
Section ring, derailing switch are located at double swivel nozzle front end, are respectively used to adjust the mixing of material spray and water and control the switch of double swivel nozzle,
Double swivel nozzle includes feed inlet respectively independence but the first nozzle and the second nozzle of discharge port connection.
2. concrete spray head according to claim 1, it is characterised in that：First nozzle and the second nozzle all include into
Material mouth and discharge port, and the waist between inlet port and outlet port is connected to, and connected surface is formed, until discharge port one end.
3. concrete spray head according to claim 2, it is characterised in that：The shape of first nozzle and the second nozzle is big
Small identical, two nozzles use sandwich.
4. concrete spray head according to claim 3, it is characterised in that：The feed inlet of first nozzle and the second nozzle
A diameter of 40mm, a diameter of 150mm of discharge port, the long 400mm of waist of feed inlet to discharge port, the first nozzle and the second nozzle
Discharge port distance of center circle be 90mm.
5. concrete spray head according to claim 1, it is characterised in that：Double swivel nozzle front end is provided with group switch, will
One feed inlet is divided into two discharge ports for being connected to double swivel nozzle, and the control of unlatching or stopping is provided with to each discharge port
End processed；Multiple control handles are additionally provided on group switch, the metering for distinguishing remote control wind pressure, accelerator and water.
6. the application method of concrete spray head according to claim 1, it is characterised in that：Spraying machine is arrived in double swivel nozzle
Front is installed by accelerator regulation ring, derailing switch；Liquid accelerating agent between high-pressure water pipe install liquid accelerating agent feedway,
Volume for controlling liquid accelerating agent；Air enters spraying machine by air hose, and compressed air, spraying machine are formed in spraying machine
Concrete mix is transported to concrete spray head by conveying hose by wind pressure, liquid accelerating agent supplies machine by liquid rapid hardening
Then agent is transported to concrete spray head by high-pressure water pipe together by being mixed with water in accelerator mixing tube force feed to high-pressure water pipe
Place, sprays after being mixed with concrete mix.
7. the application method of concrete spray head according to claim 6, it is characterised in that：According to the presetting period of accelerator
Adjust distance of the accelerator regulation ring away from double swivel nozzle.
8. the application method of concrete spray head according to claim 6, it is characterised in that：Accelerator regulation ring is for adjusting
The proportionate relationship of concrete mix, accelerator and water.
9. the application method of concrete spray head according to claim 7, it is characterised in that：The volume of accelerator is concrete
The 1%-3% of mix quality.
10. the application method of concrete spray head according to claim 9, it is characterised in that：When spraying tunnel side wall, mix
Amount is 1%；When spraying vault, volume 2%.
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| CN201810136102.4A CN108397212A (en) | 2018-02-09 | 2018-02-09 | A kind of concrete spray head and application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441117A (en) * | 2018-08-29 | 2019-03-08 | 新昌县天姥园艺发展有限公司 | A kind of concrete sprayer easy to remove |
| CN111021334A (en) * | 2019-12-28 | 2020-04-17 | 甘肃众联建设工程科技有限公司 | Underground space jet backfill process |
| CN111828045A (en) * | 2020-07-10 | 2020-10-27 | 哈尔滨工业大学 | Four-layer multi-block tunnel guniting operation planning method for automatic wet spraying machine |
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| US3840179A (en) * | 1973-06-04 | 1974-10-08 | Binks Mfg Co | Spray apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109441117A (en) * | 2018-08-29 | 2019-03-08 | 新昌县天姥园艺发展有限公司 | A kind of concrete sprayer easy to remove |
| CN111021334A (en) * | 2019-12-28 | 2020-04-17 | 甘肃众联建设工程科技有限公司 | Underground space jet backfill process |
| CN111828045A (en) * | 2020-07-10 | 2020-10-27 | 哈尔滨工业大学 | Four-layer multi-block tunnel guniting operation planning method for automatic wet spraying machine |
| CN111828045B (en) * | 2020-07-10 | 2022-07-08 | 哈尔滨工业大学 | Four-layer multi-block tunnel guniting operation planning method for automatic wet spraying machine |
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