CN115350826A - Rotary spraying device - Google Patents
Rotary spraying device Download PDFInfo
- Publication number
- CN115350826A CN115350826A CN202211008817.4A CN202211008817A CN115350826A CN 115350826 A CN115350826 A CN 115350826A CN 202211008817 A CN202211008817 A CN 202211008817A CN 115350826 A CN115350826 A CN 115350826A
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- CN
- China
- Prior art keywords
- cylinder body
- air inlet
- rotary spraying
- concrete
- spraying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 42
- 239000004567 concrete Substances 0.000 claims abstract description 46
- 238000000889 atomisation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 4
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
-
- 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
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention provides a rotary spraying device which comprises a mixing cylinder body, a taper cylinder body and a rotary spraying cylinder body which are sequentially connected, wherein the inner walls of the mixing cylinder body and the taper cylinder body are provided with rotating structures, the side wall of the mixing cylinder body is also circumferentially provided with a plurality of first air inlet holes and a plurality of second air inlet holes, and the first air inlet holes and the second air inlet holes are arranged at intervals in the axial direction; the rotating structure consists of a plurality of twisted curved surfaces; be provided with a plurality of rifles on the inner wall of rotary spraying cylinder body, the rifling is in the same direction as being connected with the curved surface of turning round, the rifling is realized coming with the two cooperation of curved surface of turning round the compressed gas that the second inlet port was come from first inlet port is to coming from the concrete of mixing cylinder body accelerates to produce the axial rotation, thereby make the concrete follow the spout is even to spout in succession. The invention can solve the problems of poor concrete rotation characteristic, easy abrasion, short service life and high concrete rebound rate of the conventional rotary spraying device.
Description
Technical Field
The invention relates to the technical field of rotary spraying, in particular to a rotary spraying device, and more particularly relates to a rotary spraying device for a concrete wet spraying machine.
Background
The concrete wet spraying machine is used as important equipment for tunnel drilling and blasting construction, is widely applied to middle and large section supporting operation of construction of various tunnels, roadways, culverts and the like in the fields of railways, highways, water conservancy, national defense, metallurgy and the like, and has the working principle that premixed concrete is conveyed through a pipeline and sprayed on a sprayed surface at a high speed by utilizing fluid power, and a concrete layer is formed by means of continuous impact and compaction of the concrete in the spraying process. The nozzle is used as the last part through which concrete flows in the spraying process of the concrete wet sprayer, is an important part for regulating the outlet characteristic of the concrete wire harness, and is a key part for ensuring that the sprayed concrete wire harness is not decompressed and dispersed and has adhesion force without rebound.
In the existing rotary spraying device, the nozzles can be divided into the following three types according to the cavity design of the nozzles:
the first type, the linear cavity type. The linear cavity type nozzle cavity has no reducing diameter, and atomized concrete has no secondary pressurization in the nozzle, so that the atomized concrete can be decompressed and dispersed when being sprayed out, and the pressure maintaining effect is not realized; therefore, the linear cavity type nozzle has poor construction quality and high concrete rebound rate;
the second type, stepped cavity type. The stepped cavity is designed to be stepped in order to solve the problem that the atomized concrete can be decompressed and dispersed when being sprayed out; namely, a step-shaped transition surface is designed at a certain part of the nozzle cavity, so that the aperture of the concrete inlet of the nozzle is larger than that of the concrete outlet of the nozzle; but the biggest defect of the stepped cavity is that the diameter of the cavity is suddenly changed, so that a nozzle is easily blocked and exploded;
and the third type is a frustum cavity type. The frustum-shaped cavity is provided with a transition taper which is reasonable in design, so that the nozzle cavity is in smooth transition, the problems in the construction of the two types of cavity can be effectively solved, and the frustum-shaped cavity is the most widely applied nozzle cavity at present.
On the basis of the third type of frustum-shaped cavity, the concrete wet spraying construction requirement is continuously improved along with the gradual maturity of the concrete wet spraying process, and the nozzle with high construction quality, long service life and low resilience rate becomes a further important research point. The continuous exploration of researchers discovers that the atomized concrete can be tightly adhered to a sprayed surface after having rotary adhesion and is not easy to rebound; based on the above, how to rotate the atomized concrete becomes a new topic, and further, design concepts such as adding a heterofacial air hole, adding a spiral line and adding a rifling groove on a frustum-shaped cavity nozzle appear in succession; but only the addition of the different-surface air holes is not enough to keep the atomized concrete to rotate all the time, and the concrete still takes the shape of a wire harness without rotary adhesive force when being sprayed out, so that the actual use effect is not ideal; the spiral line is additionally arranged, so that the atomized concrete has certain rotary adhesion, but the rotary effect is poor, and the spiral line is easy to wear; the addition of rifling grooves can also enable the atomized concrete to have certain rotary adhesion, but the dense concrete and doped sand easily block and grind the grooves flat, so that the rotary characteristic is lost.
In view of the above, there is a need for a rotary spraying device that can effectively ensure the rotation characteristics of concrete, has a long service life, is not easy to wear, and has a low rebound rate of concrete, so as to solve the problems existing in the prior art.
Disclosure of Invention
The invention aims to provide a rotary spraying device which can effectively ensure the rotation characteristic of concrete, has long service life, is not easy to wear and has low concrete rebound rate, and aims to solve the problems of poor rotation characteristic, easy wear, short service life and high concrete rebound rate of the conventional rotary spraying device, wherein the concrete technical scheme is as follows:
a rotary spraying device comprises a mixing cylinder body, a taper cylinder body and a rotary spraying cylinder body, wherein the large end of the taper cylinder body is connected with the mixing cylinder body, the small end of the taper cylinder body is connected with the rotary spraying cylinder body, the inner walls of the mixing cylinder body and the taper cylinder body are provided with rotating structures, the side wall of the mixing cylinder body is also circumferentially provided with a plurality of first air inlet holes and a plurality of second air inlet holes, and the first air inlet holes and the second air inlet holes are arranged at intervals in the axial direction;
the rotating structure consists of a plurality of twisted curved surfaces;
be provided with a plurality of rifles on the inner wall of rotary spraying cylinder body, the rifling is in the same direction as being connected with the curved surface of turning round, the rifling is realized coming with the two cooperation of curved surface of turning round the compressed gas that the second inlet port was come from first inlet port is to coming from the concrete of mixing cylinder body accelerates to produce the axial rotation, thereby make the concrete follow the spout is even to spout in succession.
Preferably, the torsion angle between the two ends of the twisted surface is 20-30 °.
Preferably, the torsion angle between both ends of the twisted surface is 22.5 °.
Preferably, the inner contour of the cross section of the rotary spraying structure along the direction of the central axis thereof is a regular polygon.
Preferably, the number of the rifling lines is the same as the number of the sides of the regular polygon, and an end point of one end of the rifling line coincides with a midpoint of one side of the regular polygon.
Preferably, the outer wall of mixed cylinder body has set gradually first seal groove, mixed flow ware mount pad and second seal groove along concrete feeding direction, first inlet port and second inlet port are located the mixed flow ware mount pad, first seal groove and second seal groove be used for with the mixed flow ware cooperation, prevent that compressed gas and accelerator from leaking.
Preferably, the taper cylinder body has an outer diameter of 72-112mm and an inner diameter of 56-96mm.
Preferably, the thread pitch of the rifling is 750-1000mm.
Preferably, the first air inlet hole is a high-pressure atomization air hole, and the second air inlet hole is a high-pressure rotation air hole.
Preferably, the central axes of the first air inlet hole and the second air inlet hole are both arranged at an angle of 30-60 degrees with the central axis of the mixing cylinder body.
The technical scheme of the invention has the following beneficial effects:
according to the invention, the rotating structures arranged on the mixing cylinder body and the taper cylinder body and the rifling arranged on the rotary spraying cylinder body are matched, and under the action of compressed gas in the first air inlet hole and the second air inlet hole, the concrete from the mixing cylinder body is accelerated and axially rotated, so that the concrete is uniformly and continuously sprayed out from the nozzle.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view showing the construction of a rotary spray apparatus according to a preferred embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of the mixing cylinder of FIG. 1 (without illustrating the rotary structure);
FIG. 3 is a schematic cross-sectional view of the mixing cylinder and the taper cylinder of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the mixing cylinder and the taper cylinder of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the rotary sprayer block of FIG. 1;
FIG. 6 is a schematic cross-sectional view of the rotary sprayer block of FIG. 1;
FIG. 7 is a perspective view of the rotary jetting apparatus of FIG. 1;
wherein, 1-mixing cylinder body, 1.1-first air inlet, 1.2-second air inlet, 2-taper cylinder body, 3-rotary spraying cylinder body, 3.1-rifling line and 4-twisted surface.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1:
referring to fig. 1 and 7, a rotary spraying device includes a mixing cylinder body 1 (see fig. 2), a taper cylinder body 2 and a rotary spraying cylinder body 3, wherein a large end (i.e., an end with a larger diameter) of the taper cylinder body 2 is connected with the mixing cylinder body 1, a small end (i.e., an end with a smaller diameter) of the taper cylinder body is connected with the rotary spraying cylinder body 3, the inner walls of the mixing cylinder body 1 and the taper cylinder body 2 are provided with a rotary structure, the side wall of the mixing cylinder body 1 is further provided with four first air inlet holes 1.1 and sixteen second air inlet holes 1.2 in the circumferential direction, and the first air inlet holes 1.1 and the second air inlet holes 1.2 are arranged at intervals in the axial direction;
referring to fig. 3 and 4, the rotating structure is composed of eight twisted surfaces 4 (in this embodiment, the twisted surfaces 4 are twisted fan-shaped surfaces), and the twisted surfaces 4 are used for enabling compressed gas to move along the twisted surfaces 4 all the time so as to form a thin gas protective layer, so that the high-speed rotating atomized concrete moves spirally, and the inner wall abrasion and the injection resistance are reduced;
referring to fig. 5 and 6, eight rifling lines 3.1 are arranged on the inner wall of the rotary spraying cylinder body 3, the rifling lines 3.1 are smoothly connected with the twisted surface 4, and the rifling lines 3.1 and the twisted surface 4 are matched to accelerate the concrete from the mixing cylinder body 1 by the compressed gas from the first air inlet holes 1.1 and the second air inlet holes 1.2 and generate axial rotation, so that the concrete is uniformly and continuously sprayed out from the nozzle.
In this embodiment, the torsion angle between the two ends of the twisted surface 4 is 22.5 °.
In this embodiment, the cross section of the rotary spraying structure along the central axis thereof is a regular octagon, the diameter of the circumscribed circle of the octagon at the maximum cross section inner contour is 96mm, the diameter of the circumscribed circle of the octagon at the minimum cross section inner contour is 56mm, and the radius of the fillet at each vertex of the inner contour is 5mm.
In this embodiment, the end point of one end of the rifling 3.1 coincides with the middle point of one side of the regular polygon.
In this embodiment, the outer wall of the mixing cylinder body 1 has set gradually first seal groove, mixed flow ware mount pad and second seal groove along the concrete feeding direction, first seal groove is the same with the second seal groove structure, first inlet port 1.1 and second inlet port 1.2 are located the mixed flow ware mount pad, first seal groove and second seal groove be used for cooperating with the mixed flow ware, prevent that compressed gas and accelerating agent from leaking, the mixed flow ware mount pad is used for installing the mixed flow ware, the mixed flow ware is prior art.
In the embodiment, the outer diameter of the taper cylinder body 2 is 72-112mm, and the inner diameter thereof is 56-96mm; the shape of the taper cylinder body 2 is a taper.
In this embodiment, the pitch of the rifling 3.1 is 750-1000mm (800 mm in this embodiment).
In this embodiment, the first air inlet hole 1.1 is a high pressure atomization air hole (the inner diameter is 6mm in this embodiment), and the second air inlet hole 1.2 is a high pressure rotation air hole (the inner diameter is 5mm in this embodiment).
In the present embodiment, the central axes of the first and second intake ports 1.1 and 1.2 are both disposed at 30 to 60 ° (45 ° in the present embodiment) from the central axis of the mixing cylinder 1.
The technical scheme of the embodiment is specifically as follows: and (3) mounting the mixer on the mixing cylinder body 1, and connecting the concrete conveying pipe into the mixing cylinder body 1 to finish the mounting.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rotary spraying device is characterized by comprising a mixing cylinder body (1), a taper cylinder body (2) and a rotary spraying cylinder body (3), wherein the large end of the taper cylinder body (2) is connected with the mixing cylinder body (1), the small end of the taper cylinder body is connected with the rotary spraying cylinder body (3), the inner walls of the mixing cylinder body (1) and the taper cylinder body (2) are provided with rotating structures, the side wall of the mixing cylinder body (1) is also circumferentially provided with a plurality of first air inlet holes (1.1) and a plurality of second air inlet holes (1.2), and the first air inlet holes (1.1) and the second air inlet holes (1.2) are axially arranged at intervals;
the rotating structure consists of a plurality of twisted surfaces (4);
be provided with a plurality of rifling (3.1) on the inner wall of whirl spraying cylinder body (3), rifling (3.1) is connected with the smooth of torsional curved surface (4), rifling (3.1) and the two cooperation realization of torsional curved surface (4) make and come from first inlet port (1.1) and the compressed gas of second inlet port (1.2) is to coming from the concrete of hybrid cylinder body (1) accelerates to produce the axial rotation, thereby make the concrete follow the spout is even to spout in succession.
2. The rotary spraying device according to claim 1, characterized in that the twist angle between the two ends of the twisted surface (4) is 20-30 °.
3. The rotary spraying device according to claim 2, characterized in that the twist angle between the two ends of the twisted surface (4) is 22.5 °.
4. The rotary jetting apparatus of claim 1, wherein an inner profile of a cross-section of the rotary jetting structure along a central axis thereof is a regular polygon.
5. The rotary spraying device according to claim 4, characterized in that the number of the rifling lines (3.1) is the same as the number of sides of the regular polygon, and the end point of one end of the rifling line (3.1) coincides with the midpoint of one side of the regular polygon.
6. The rotary spraying device of claim 1, characterized in that a first sealing groove, a mixer mounting seat and a second sealing groove are sequentially arranged on the outer wall of the mixing cylinder body (1) along the concrete conveying direction, the first air inlet hole (1.1) and the second air inlet hole (1.2) are positioned on the mixer mounting seat, and the first sealing groove and the second sealing groove are used for being matched with the mixer to prevent compressed air and an accelerating agent from leaking.
7. The rotary spraying device according to claim 1, characterized in that the tapered cylinder (2) has an outer diameter of 72-112mm and an inner diameter of 56-96mm.
8. The rotary spraying device according to claim 1, characterized in that the pitch of the rifling (3.1) is 750-1000mm.
9. The rotary spraying device according to claim 1, characterized in that the first air inlet holes (1.1) are high pressure atomization air holes and the second air inlet holes (1.2) are high pressure rotation air holes.
10. The rotary jetting device according to claim 9, characterized in that the central axes of the first (1.1) and second (1.2) inlet ports are both arranged at 30-60 ° to the central axis of the mixing cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008817.4A CN115350826A (en) | 2022-08-22 | 2022-08-22 | Rotary spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008817.4A CN115350826A (en) | 2022-08-22 | 2022-08-22 | Rotary spraying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115350826A true CN115350826A (en) | 2022-11-18 |
Family
ID=84003430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211008817.4A Pending CN115350826A (en) | 2022-08-22 | 2022-08-22 | Rotary spraying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115350826A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1340357A (en) * | 1970-04-08 | 1973-12-12 | Knapp Alfons | Flow mixing fitting and a method for the manufacture |
| JPH03257259A (en) * | 1990-03-08 | 1991-11-15 | Sugiue Eng Kk | Addition agent spray nozzle for ready-mixed concrete or the like |
| JP2001248164A (en) * | 2000-03-03 | 2001-09-14 | Nisshoku Corp | Construction method for spraying mixture and apparatus therefor |
| CN203508236U (en) * | 2013-07-09 | 2014-04-02 | 王浦勋 | Pre-rotation cavitation jet flow nozzle |
| CN104549816A (en) * | 2014-11-28 | 2015-04-29 | 山东科技大学 | Low-rebound rate and low-dust concrete nozzle device in anchor spray shoring engineering |
| CN106225058A (en) * | 2016-07-29 | 2016-12-14 | 青岛海尔空调器有限总公司 | Drainage type vertical air conditioner and mixed wind method |
| CN207515574U (en) * | 2017-10-30 | 2018-06-19 | 清华大学 | Casing enhanced heat exchange unit block and vortex type high-efficient double pipe heat exchanger |
| CN108554664A (en) * | 2018-06-22 | 2018-09-21 | 衡阳泰源商砼有限公司 | A kind of nozzle arrangements of gunite concrete |
| CN109881893A (en) * | 2019-03-08 | 2019-06-14 | 中国铁建重工集团有限公司 | A kind of nozzle for wet shot trolley |
| CN209263294U (en) * | 2018-11-08 | 2019-08-16 | 武城县冠智信息产业技术有限公司 | A kind of binary channels diffuser design |
| CN110805511A (en) * | 2018-08-05 | 2020-02-18 | 大连理工大学 | Nozzle with partially twisted elliptical spray holes |
| CN110801948A (en) * | 2018-08-05 | 2020-02-18 | 大连理工大学 | Nozzle with torsional 8-shaped spray hole |
| CN112413580A (en) * | 2020-11-27 | 2021-02-26 | 扬州大学 | Heavy oil burner using bubble atomizing nozzle and operation method thereof |
| CN112855222A (en) * | 2021-04-02 | 2021-05-28 | 中国铁建重工集团股份有限公司 | A mould spouts device for concrete sprays |
| KR20210081476A (en) * | 2019-12-23 | 2021-07-02 | 중앙대학교 산학협력단 | Mortar Shotcrete Spraying apparatus having improved adhesive performance |
| CN215917972U (en) * | 2021-07-09 | 2022-03-01 | 云南精石新型建材科技有限公司 | Liquid accelerator atomizing device |
-
2022
- 2022-08-22 CN CN202211008817.4A patent/CN115350826A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1340357A (en) * | 1970-04-08 | 1973-12-12 | Knapp Alfons | Flow mixing fitting and a method for the manufacture |
| JPH03257259A (en) * | 1990-03-08 | 1991-11-15 | Sugiue Eng Kk | Addition agent spray nozzle for ready-mixed concrete or the like |
| JP2001248164A (en) * | 2000-03-03 | 2001-09-14 | Nisshoku Corp | Construction method for spraying mixture and apparatus therefor |
| CN203508236U (en) * | 2013-07-09 | 2014-04-02 | 王浦勋 | Pre-rotation cavitation jet flow nozzle |
| CN104549816A (en) * | 2014-11-28 | 2015-04-29 | 山东科技大学 | Low-rebound rate and low-dust concrete nozzle device in anchor spray shoring engineering |
| CN106225058A (en) * | 2016-07-29 | 2016-12-14 | 青岛海尔空调器有限总公司 | Drainage type vertical air conditioner and mixed wind method |
| CN207515574U (en) * | 2017-10-30 | 2018-06-19 | 清华大学 | Casing enhanced heat exchange unit block and vortex type high-efficient double pipe heat exchanger |
| CN108554664A (en) * | 2018-06-22 | 2018-09-21 | 衡阳泰源商砼有限公司 | A kind of nozzle arrangements of gunite concrete |
| CN110801948A (en) * | 2018-08-05 | 2020-02-18 | 大连理工大学 | Nozzle with torsional 8-shaped spray hole |
| CN110805511A (en) * | 2018-08-05 | 2020-02-18 | 大连理工大学 | Nozzle with partially twisted elliptical spray holes |
| CN209263294U (en) * | 2018-11-08 | 2019-08-16 | 武城县冠智信息产业技术有限公司 | A kind of binary channels diffuser design |
| CN109881893A (en) * | 2019-03-08 | 2019-06-14 | 中国铁建重工集团有限公司 | A kind of nozzle for wet shot trolley |
| KR20210081476A (en) * | 2019-12-23 | 2021-07-02 | 중앙대학교 산학협력단 | Mortar Shotcrete Spraying apparatus having improved adhesive performance |
| CN112413580A (en) * | 2020-11-27 | 2021-02-26 | 扬州大学 | Heavy oil burner using bubble atomizing nozzle and operation method thereof |
| CN112855222A (en) * | 2021-04-02 | 2021-05-28 | 中国铁建重工集团股份有限公司 | A mould spouts device for concrete sprays |
| CN215917972U (en) * | 2021-07-09 | 2022-03-01 | 云南精石新型建材科技有限公司 | Liquid accelerator atomizing device |
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