CN1118034A - Method for dry spraying concrete and spraying gun for it - Google Patents
Method for dry spraying concrete and spraying gun for it Download PDFInfo
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- CN1118034A CN1118034A CN 95108248 CN95108248A CN1118034A CN 1118034 A CN1118034 A CN 1118034A CN 95108248 CN95108248 CN 95108248 CN 95108248 A CN95108248 A CN 95108248A CN 1118034 A CN1118034 A CN 1118034A
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Abstract
The characteristic of the invented method lies in that the water is firstly treated by atomizing then mixed with the dry stock of the concrete. For this reason, at least one set of water atomizing device and large volume mixing chamber are added to the spray gun and the nozzle is improved. By using said method and spray gun in construction, not only the high quality coating approaching that of by using wet method can be obtained, but also the rebound degree of the stock is decreased from orginally 60% to near zero, and the dust pollution is greatly lowered and all problems in the by using dry spray method are solved, besides it also features simple structure, convenient for operation and maintenance and low cost.
Description
The present invention relates to a kind of method and spray gun of sprayed mortar, especially for the method and the employed spray gun of dry method sprayed mortar coating.
In the available coagulation soil sprayed construction, two kinds of dry method and wet methods are arranged.Wet method is that concrete drier, bonding agent, the prior water mixing of coagulating agent are stirred behind the pulping, delivers to spray gun with grout pump.The apparatus expensive that its shortcoming is to use, and in order to prevent that slip from solidifying in feed mechanism, operation is all very complicated with plant maintenance.Dry method is to deliver to spray gun with pneumatic means after concrete drier is added bonding agent, coagulating agent, contacts with the water under high pressure that injects spray gun to mix to be sprayed onto the construction surface.Dry method compare with wet method have that construction equipment is simple, good reliability, advantage such as easy to maintenance, also be the most frequently used injection method therefore.Spray the coating obtain often the quality not as wet method is good but be used for method, this mainly is because water is short time of contact in spray gun with concrete drier, can not get full and uniform mixing extremely.The design of the water system of spray gun also just has one to two group of water injection hole or circumferential weld on the tube wall of siccative carrier pipe in the prior art in rifle, High-Pressure Water directly is pressed in the pipeline mixes with siccative.In order to obtain blending effect preferably, hole and seam all should be opened as far as possible for a short time, generally about 2mm.Because this way of supplying water and method for designing, make water injection hole be easy to be stopped up by material, siccative and water incomplete mixing appear, even water, the material phenomenon of separating, especially when siccative carefully when (is rafractory concrete as siccative), the siccative fine powder also can wrap up water droplet, make the siccative can not be moistening, cause the material rebound degree to be higher than 60%, not only waste raw material, produce a large amount of dust simultaneously; If oversupplied water though reduced dust, can cause coating to flow again.These all are the problems that exists and fail to be solved always at all in the existing dry method sprayed construction.
The purpose of this invention is to provide a kind of method and employed spray gun that can fundamentally solve the variety of issue of meeting in the concrete dry method sprayed construction.
For finishing the foregoing invention purpose, the present invention has adopted with the water after the atomizing and has substituted the method that High-Pressure Water mixes with siccative.This method may further comprise the steps:
1) water and compressed air are made water fogging by a cover water atomization plant;
2) water and the concrete drier after will atomizing carries out blending by nozzle in spray gun;
3) mixture of siccative and water smoke sprays from spray gun after by one or more hybrid chambers.
The invention still further relates to and adopt the employed spray gun of said method, it comprises charging aperture, shell, water inlet, prolongation pipe and lance head, it is characterized in that it has set up the water atomization plant that at least one cover is made up of air inlet port, (operating) water nozzle, gas jets, water atomizing nozzle, water atomization chamber, and siccative nozzle, hydraulic spray nozzle, material-atomizing nozzle and hybrid chamber.The siccative nozzle places the front end of charging aperture, and suit rear end in the enclosure, the front end of siccative nozzle places a chamber in the shell and forms the water atomization chamber, the inwall in water atomization chamber is provided with water atomizing nozzle, on shell, have a chamber with exterior with hydraulic spray nozzle is coaxial, be used to connect water inlet and settle (operating) water nozzle, opposite side at shell has and the vertical hole that communicates of chamber, in order to connect air inlet port, be provided with gas jets and (operating) water nozzle between chamber and water atomizing nozzle, the front end in water atomization chamber is provided with hydraulic spray nozzle, its front end is connected to material-atomizing nozzle, the front end of material-atomizing nozzle can connect the hybrid chamber of one or more large volumes, also can directly join with the prolongation pipe, and the final outlet of spray gun is provided with the lance head with an above spout.
Because the present invention has adopted the way of supplying water of atomized water, it is full and uniform moistening that siccative can be obtained, not only can obtain high-quality coating near wet spraying, material rebound degree in the spraying process is dropped near zero by original 60%, thereby saved big content of starting materials, simultaneously also greatly reduce dust pollution, fundamentally solved the variety of issue in the existing dry construction.Simple in structure in addition in addition, operation, easy to maintenance, characteristics such as cost is low.
The present invention has following accompanying drawing:
Fig. 1 is a spray gun structure schematic diagram of the present invention.
Fig. 2 is that A-A of Fig. 1 is to cut-away view.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Subject matter in the existing dry construction mostly is because due to the granularity of water is difficult for too greatly being absorbed well by siccative, and the best method that addresses this problem is exactly that water droplet further is broken into thinner particle.The present invention has adopted the water atomization processing method for this reason, mixes with siccative after earlier water being handled with the compressed air atomizing again.Because it is minimum that water is atomized back gained particle, solid being difficult for wrapped up by the siccative fine powder, and with the contact area increasing of siccative, easilier absorbed by siccative.For realizing this method, the present invention also according to the Hydrodynamics Theory specialized designs new spray gun.
As shown in Figure 1, concrete drier import 17 is connected in by flange seal on the shell 1 at spray gun rear portion, and its front end is provided with a siccative nozzle 2, and the front end of nozzle 2 places a cylinder chamber in the shell 1 and forms annular water atomization chamber 9.On the inwall in water atomization chamber 9, have a hole and make water atomizing nozzle 8 (as shown in Figure 2), the other end of nozzle 8 is by communicating with the external world with its coaxial chamber 6, be used to connect water inlet 3, front end at water inlet 3 is equipped with (operating) water nozzle 4, the fore-end of (operating) water nozzle 4 places in the water atomizing nozzle 8 than its slightly larger in diameter, and forms the gas jets 7 of an annular thus.Opposite side at shell 1 has and the chamber 6 vertical holes that communicate, and is used to connect air inlet port 5.Compressed air is pressed into the gas jets 7 of annular by air inlet port 5 and chamber 6.In water atomizing nozzle 8, compressed air meets with the current of ejection in (operating) water nozzle 4 and has finished the preliminary atomizing of water, is sprayed into then and strengthens atomizing in the water atomization chamber 9.In order to obtain better atomizing effect, make entering the water smoke generation eddy flow of atomization chamber 9, the axis normal of the nozzle 8 that makes water fogging during design is offset to axis one side in water atomization chamber 9, allows water-gas mixture enter along the tangential direction in water atomization chamber 9.
Front end in water atomization chamber 9 has a taper hole along the direction of advance contraction, and the bus of taper hole and the angle of its axis are between 30 °～60 °, and the outlet of this hole and siccative nozzle 2 is the hydraulic spray nozzle 10 of a circular seam type of intermarginal formation outward.This method for designing can force from the water smoke of hydraulic spray nozzle 10 ejections and meet with the concrete drier that sprays from siccative nozzle 2 with 30 °～60 ° angle.Front end at hydraulic spray nozzle 10 is connected to a material-atomizing nozzle 11, is convenient design, and material-atomizing nozzle 11 can be a hole coaxial with siccative nozzle 2 in shell 1, also can be one and be sleeved on the interior independently nozzle of shell 1.Siccative has been finished for the first time from 11 ejections of material-atomizing nozzle simultaneously with water smoke and has been mixed.
For the further blending of aggravation material and water smoke, it is more even thorough moistening that siccative is obtained, outlet at material-atomizing nozzle 11 connects at least one large volume hybrid chamber 12 coaxial with it, this hybrid chamber 12 can simple designs become the cylinder cavity of a diameter greater than material-atomizing nozzle 11, also can adopt the hybrid chamber of the expansion-contraction type in the embodiment of the invention, promptly chamber has one successively along the conical surface of direction of advance expansion and the conical surface of a contraction.For ease of processing, the transformation segment of a cylinder is arranged between two conical surfaces.This hybrid chamber is based on Hydrodynamics Theory and designs, and can make material, mist produce vortex therein, aggravates their mixing.The optimum design of this hybrid chamber is of a size of: its length is 3～8 times of material-atomizing nozzle 11 diameters; Its expansion-contraction transformation segment appears within 1/3rd on the hybrid chamber length direction; The area of the expansion cross section of its maximum and the contracted section of minimum is than between 2～10.
Be the on-the-spot remote-controlled operation of convenient construction, can prolong in thread seal between lance head 15 and hybrid chamber 12 outlets or welding and manage 13 that its length can determine according to field condition.
Lance head 15 only is provided with an axial spout 18 in the prior art, and is provided with the screw thread that is used for installing nozzle 16.The present invention has set up one in a side of lance head 15 axial jet pipes has the branch road spout 19 of 15 °～60 ° of angles with its axis, and this spout also is provided with the screw thread that nozzle 16 is installed.During use, can select spout 18 to do straight spray or spout 19 is done tiltedly spray according to the condition of job site, and with another with screw thread or welded seal.This design has brought an advantage, especially when using branch road spout 19 to make the final spout of slip, because spout 18 is sealed, has formed a flow-disturbing chamber 14 naturally, and slip produces disturbance because of be compelled to turn head at this, has strengthened the mixing of material-mist again.In order to reach similar effects, also can be directly with curved 15 °～60 ° in the wrong of the lance head front end with an axial spout.
In actual design, in order to obtain better coating quality and reduction dust pollution, the hybrid chamber of a cover or more atomized water injection device and large volume can be set up in any position on spray gun.This rifle is applicable to various concrete dry method sprayed constructions, is particularly useful for the spraying of rafractory concrete.
Claims (9)
1. the method for a dry method sprayed mortar, it is water and concrete drier to be mixed the back mutually spray from spray gun, it is characterized in that it may further comprise the steps:
1) water and compressed air are made water fogging by a cover water atomization plant;
2) water and the concrete drier after will atomizing carries out blending by nozzle in spray gun;
3) mixture of siccative and water smoke sprays from spray gun after by one or more hybrid chambers.
2. spray gun for realizing that concrete injection method as claimed in claim 1 designs, it comprises charging aperture (17), shell (1), water inlet (3), prolong pipe (13), lance head (15) and nozzle (16), it is characterized in that it has set up at least one cover by air inlet port (5), (operating) water nozzle (4), gas jets (7), water atomizing nozzle (8), the water atomization plant that water atomization chamber (9) is formed, and siccative nozzle (2), hydraulic spray nozzle (10), material-atomizing nozzle (11) and hybrid chamber (12), siccative nozzle (2) places the front end of charging aperture (17), and be sleeved on the rear end of shell (1), the front end of siccative nozzle (2) places a chamber in the shell (1) and forms water atomization chamber (9), the inwall in water atomization chamber (9) is provided with water atomizing nozzle (8), on shell (1), have a chamber (6) with exterior with water atomizing nozzle (8) is coaxial, be used to connect water inlet (3) and settle (operating) water nozzle (4), opposite side at shell (1) has and the vertical hole that communicates of chamber (6), in order to connect air inlet port (5), be provided with gas jets (7) and (operating) water nozzle (4) between chamber (6) and water atomizing nozzle (8), the front end in water atomization chamber (9) is provided with hydraulic spray nozzle (10), its front end is connected to material-atomizing nozzle (11), the front end of material-atomizing nozzle (11) can connect the hybrid chamber (12) of one or more large volumes, also can directly join with prolongation pipe (13), the final outlet of spray gun is provided with the lance head of an above spout (15).
3. concrete gun as claimed in claim 2, it is characterized in that said hydraulic spray nozzle (10) is the nozzle of a circular seam type, promptly have a contraction taper hole, an outer intermarginal circumferential weld and the common formation hydraulic spray nozzle (10) of having formed of this hole and siccative nozzle (2) outlet in the exit of water atomization chamber (9).
4. concrete gun as claimed in claim 3, the angle that it is characterized in that the contraction taper hole bus of said circular seam type water atomizing nozzle (10) and axis is between 30 °～60 °.
5. concrete gun as claimed in claim 4 is characterized in that the axis normal of said water atomizing nozzle (8) is offset to a side of water atomization chamber (9) axis, makes water-gas mixture inject water atomization chamber (9) along eccentric direction.
6. as claim 2 or 5 described concrete guns, it is characterized in that said large volume hybrid chamber (12) is an expansion-contraction hybrid chamber, promptly this hybrid chamber has the expansion conical surface and the contraction conical surface along the slip direction of advance at least, can have a cylinder transformation segment between two conical surfaces.
7. concrete gun as claimed in claim 6, the optimum design that it is characterized in that said expansion-contraction hybrid chamber (12) is of a size of: its length is 3～8 times of material-atomizing nozzle (11) diameter, its expansion-contraction transformation segment appears within 1/3rd on the hybrid chamber length direction, and the ratio of the expansion cross section of its maximum and the contracted section of minimum is between 2～10.
8. concrete gun as claimed in claim 2 is characterized in that said lance head (15) only has one and with its axis the spout of 15 °～60 ° of angles arranged, and is provided with the screw thread that is used to install nozzle (16) at the spout place.
9. concrete gun as claimed in claim 2, it is characterized in that said lance head (15) has the branch road spout (19) that an axial spout (18) and and its axis have 15 °～60 ° of angles, nozzle (16) can be installed in spout (18), (19) both one of on, another is with screw thread or welded seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108248 CN1118034A (en) | 1995-07-25 | 1995-07-25 | Method for dry spraying concrete and spraying gun for it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108248 CN1118034A (en) | 1995-07-25 | 1995-07-25 | Method for dry spraying concrete and spraying gun for it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1118034A true CN1118034A (en) | 1996-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95108248 Pending CN1118034A (en) | 1995-07-25 | 1995-07-25 | Method for dry spraying concrete and spraying gun for it |
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| CN (1) | CN1118034A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103382763A (en) * | 2013-08-15 | 2013-11-06 | 李正杰 | Wall surface powder spraying machine set |
| CN103741957A (en) * | 2013-12-27 | 2014-04-23 | 深圳市富诚幕墙装饰工程有限公司 | Integrated type high-pressure spray gun |
| CN105019921A (en) * | 2015-08-18 | 2015-11-04 | 淮南久辉工贸有限责任公司 | Mining rotor type variable shotcrete machine |
| CN105863269A (en) * | 2016-05-23 | 2016-08-17 | 安徽理工大学 | Dust-reducing dry type mortar spraying machine spray gun and use method thereof |
| CN110944961A (en) * | 2017-06-13 | 2020-03-31 | Gcp应用技术有限公司 | Method for making concrete products and structures |
| CN113266398A (en) * | 2021-06-18 | 2021-08-17 | 中煤科工集团重庆研究院有限公司 | Spray gun and method for reducing rebound rate of wet sprayed concrete |
-
1995
- 1995-07-25 CN CN 95108248 patent/CN1118034A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103382763A (en) * | 2013-08-15 | 2013-11-06 | 李正杰 | Wall surface powder spraying machine set |
| CN103741957A (en) * | 2013-12-27 | 2014-04-23 | 深圳市富诚幕墙装饰工程有限公司 | Integrated type high-pressure spray gun |
| CN105019921A (en) * | 2015-08-18 | 2015-11-04 | 淮南久辉工贸有限责任公司 | Mining rotor type variable shotcrete machine |
| CN105863269A (en) * | 2016-05-23 | 2016-08-17 | 安徽理工大学 | Dust-reducing dry type mortar spraying machine spray gun and use method thereof |
| CN110944961A (en) * | 2017-06-13 | 2020-03-31 | Gcp应用技术有限公司 | Method for making concrete products and structures |
| CN113266398A (en) * | 2021-06-18 | 2021-08-17 | 中煤科工集团重庆研究院有限公司 | Spray gun and method for reducing rebound rate of wet sprayed concrete |
| CN113266398B (en) * | 2021-06-18 | 2023-11-07 | 中煤科工集团重庆研究院有限公司 | Spray gun and method for reducing rebound rate of wet sprayed concrete |
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