CN112657698A - Pneumatic spray gun and method for spraying solid waste cementing material - Google Patents
Pneumatic spray gun and method for spraying solid waste cementing material Download PDFInfo
- Publication number
- CN112657698A CN112657698A CN202011536980.9A CN202011536980A CN112657698A CN 112657698 A CN112657698 A CN 112657698A CN 202011536980 A CN202011536980 A CN 202011536980A CN 112657698 A CN112657698 A CN 112657698A
- Authority
- CN
- China
- Prior art keywords
- pipe body
- pipe
- spray gun
- axis
- compressed air
- 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.)
- Granted
Links
Images
Landscapes
- Nozzles (AREA)
Abstract
The invention relates to a pneumatic spray gun and a method for spraying solid waste cementing materials. The pneumatic spray gun comprises a first pipe body, wherein one end of the first pipe body is provided with a first inlet; the second pipe body is connected with the other end of the first pipe body; the included angle formed by the axis of the second pipe body and the axis of the first pipe body is 110-150 degrees; the third pipe body is connected with the second pipe body; the axis of the third pipe body is parallel to the axis of the first pipe body; the fourth pipe body is connected with the third pipe body; a material outlet is arranged at one end of the fourth pipe body; the method comprises the following steps: the solid waste gel material enters the spray gun and is conveyed to the second pipe body; and the additive and the compressed air enter the second pipe body, are stirred and mixed with the solid waste gel material, and are sprayed through the material outlet. The technical problem to be solved is to realize the construction of spraying the solid waste cementing material by a wet mixing method under the stirring of compressed air, so that the admixture and the spraying material can be fully mixed in a spray gun in the spraying process, and simultaneously, the high-speed spraying requirement of the solid waste cementing material can be met, thereby being more suitable for practicality.
Description
Technical Field
The invention belongs to the technical field of solid waste cementing material equipment manufacturing, and particularly relates to a pneumatic spray gun and a solid waste cementing material spraying method.
Background
The high-speed injection solid waste cementing material is mainly used in the fields of tunnel support, foundation pit support, high-temperature kiln maintenance and the like. The traditional high-speed sprayed solid waste cementing material is constructed by adopting a dry mixing method, but a large amount of dust is easily generated on a construction site, so that the construction environment is greatly polluted, and the health of construction personnel is seriously influenced.
At present, the construction process of the solid waste cementing material sprayed at high speed is more and more replaced by the construction of a wet mixing method. However, since the solid waste cementing material needs to be quickly coagulated by high-speed spraying, the admixture needed for quickly coagulating the solid waste cementing material cannot be added in advance in the wet-mixing construction, so that the corresponding admixture needs to be added along with the wet solid waste cementing material in the wet-mixing construction to realize the quick coagulation of the solid waste cementing material. However, the existing wet mixing method for on-site mixing construction has the disadvantages of insufficient mixing of the solid waste cementing material and the additive, segregation and layering, low spraying speed and the like.
Disclosure of Invention
The invention mainly aims to provide a pneumatic spray gun and a method for spraying solid waste cementing materials, and aims to solve the technical problem of realizing the spraying of the solid waste cementing materials by wet mixing construction under the stirring of compressed air, so that an additive and the spraying materials can be fully mixed in the spray gun in the spraying process, and simultaneously the high-speed spraying requirement of the solid waste cementing materials can be met, and the pneumatic spray gun and the method are more practical.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, there is provided a pneumatic spray gun comprising:
a first pipe body, one end of which is a first inlet;
a second pipe body connected to the other end of the first pipe body; the included angle formed by the axis of the second pipe body and the axis of the first pipe body is 110-150 degrees;
a third pipe connected to the second pipe; the axis of the third pipe body is parallel to the axis of the first pipe body;
a fourth tube connected to the third tube; and a material outlet is arranged at one end of the fourth pipe body.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the pneumatic spray gun is provided with rifling lines on the inner wall of the second pipe and the inner wall of the third pipe.
Preferably, in the pneumatic spray gun, axes of the first pipe, the second pipe, the third pipe and the fourth pipe are all in the same plane.
Preferably, the pneumatic spray gun is provided with a second inlet on the pipe wall of the second pipe body; the spray gun further comprises:
the additive adding pipe is connected with the second pipe body through the second inlet;
and the compressed air inlet pipe is connected with the second pipe body through the second inlet.
Preferably, in the pneumatic spray gun, an axis of the additive adding pipe and an axis of the second pipe body are located in the same plane, and an included angle of 30-35 degrees is formed between the axes.
Preferably, in the pneumatic spray gun, an axis of the compressed air inlet pipe and an axis of the second pipe body are arranged at an angle of 30-35 degrees; and the axis of the compressed air inlet pipe and the axis of the additive adding pipe form an included angle of 30-35 degrees.
Preferably, in the pneumatic spray gun, an included angle formed between the axis of the second pipe and the axis of the first pipe is 120 ° to 125 °.
Preferably, the first pipe, the second pipe, the third pipe and the fourth pipe are detachably connected to each other by a screw thread.
Preferably, the first pipe, the second pipe and the third pipe are connected by welding; the fourth body with the third body passes through the screw thread and can dismantle the connection.
Preferably, in the pneumatic spray gun, the first pipe body, the second pipe body, the third pipe body, the additive adding pipe and the compressed air inlet pipe are all cylindrical structures;
the fourth pipe body is of a conical structure, one end of the fourth pipe body, which is connected with the third pipe body, is a large end, and the end provided with the material outlet is a small end; the diameter of the small end is smaller than that of the large end.
Preferably, in the pneumatic spray gun, the size difference of the diameters of the first pipe body, the second pipe body and the third pipe body is less than or equal to 1%; the ratio of the small end diameter to the large end diameter of the fourth pipe body is 1: 1.98-2.02; the ratio of the diameter of the additive adding pipe to the diameter of the first pipe body is 1: 4.95-5.05; the ratio of the diameter of the compressed air inlet pipe to the diameter of the second pipe body is 3: 99-101.
The object of the present invention and the technical problem to be solved are also achieved by the following technical means. According to the invention, the injection method of the solid waste cementing material is applied to the pneumatic spray gun, and comprises the following steps:
the solid waste gel material without the additive enters the spray gun through the first inlet, passes through the first pipe body and is conveyed to the second pipe body;
the additive enters the second pipe body through the second inlet;
compressed air enters the second pipe body through the second inlet; the compressed air carries the admixture to be sequentially stirred and mixed with the solid waste gel material in the second pipe body and the third pipe body, and the mixed material enters the fourth pipe body and is sprayed through the material outlet.
By the technical scheme, the pneumatic spray gun and the injection method of the solid waste cementing material provided by the invention at least have the following advantages:
1. the invention provides a pneumatic spray gun and a spraying method of solid waste cementing materials, wherein the key point is that a gun body of the spray gun is designed in a segmented mode, an inclined second pipe body is arranged between a first pipe body and a third pipe body, the inclined second pipe body enables the sprayed materials to be stirred and mixed in the gun body and not directly conveyed to an outlet of a nozzle to be sprayed out, so that the solid waste cementing materials and additives are firstly mixed once through the second pipe body under the stirring of compressed air, then enter the third pipe body to be mixed twice, and finally accelerated spraying is achieved through an outlet of a conical spray gun, so that the additives and the sprayed materials do not need to be mixed in advance, the problems of dust pollution and harm to the health of construction personnel in a dry mixing method do not exist, the construction time for mixing additives in advance in a traditional wet mixing method is limited, the solid waste cementing materials and the additives are not fully mixed, and the spraying method of the solid waste cementing materials and the additives is not fully mixed, The defects of segregation and layering, low spraying speed and the like are overcome, the wet mixing process that the admixture and the spraying material can be fully mixed in the spray gun in the spraying process is realized, and meanwhile, the high-speed spraying requirement of the solid waste cementing material can be met;
2. according to the pneumatic spray gun and the injection method of the solid waste cementing material, the additive adding pipe and the compressed air inlet pipe enter the gun body through the shared second inlet, so that the additive can move along with the carrying of compressed air all the time, and the stirring and mixing of the additive and the injection material are realized; meanwhile, rifling is arranged in the second pipe body and the third pipe body, so that the movement tracks of the materials in the gun body do not move linearly, and the compressed air carries mixed materials to rotate at high speed in the second pipe body and the third pipe body in a spiral manner, so that the retention time of the materials in the gun body is prolonged, the mixed materials can rotate at high speed and are fully stirred, the full mixing between the additive and the solid waste gel material is realized, the stirring and mixing effects are good, the additive is uniformly distributed, and the quality of the sprayed material is improved;
3. the pneumatic spray gun and the injection method of the solid waste cementing material have simple structures, and the size difference of the diameters of the first pipe body, the second pipe body and the third pipe body is limited to be less than or equal to 1 percent by only limiting the size proportional relation among the pipe bodies and the relative position relation among the pipelines, and by limiting the angle between the second pipe body and the first pipe body and the third pipe body, the included angle between the additive adding pipe and the second pipe body, the included angle between the compressed air inlet pipe and the additive adding pipe and the second pipe body, and the size difference of the diameters of the first pipe body, the second pipe body and the third pipe body; the ratio of the small end diameter to the large end diameter of the fourth pipe body is 1: 1.98-2.02; the ratio of the diameter of the additive adding pipe to the diameter of the first pipe body is 1: 4.95-5.05; the ratio of the diameter of the compressed air inlet pipe to the diameter of the second pipe body is 3: 99-101, the motor drive is not needed, the compressed air is only used for carrying materials, the full mixing and the high-speed injection of solid waste gel materials can be realized through the movement in the gun body, meanwhile, the pipes at all sections are detachably connected, the cleaning and the maintenance are convenient, the disassembly and the assembly are convenient during site construction, and the practicability is high.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic front view of a pneumatic lance in accordance with the present invention;
FIG. 2 is a schematic top view of the pneumatic lance of the present invention;
FIG. 3 is a schematic left-side view of the pneumatic lance of the present invention;
FIG. 4 is a schematic structural view of a fourth tubular body of the pneumatic lance of the present invention;
fig. 5 is a schematic structural view of a third pipe body of the pneumatic spray gun according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on the specific implementation, structure, features and effects of a pneumatic spray gun and a method for spraying solid waste cementing material according to the present invention with reference to the accompanying drawings and preferred embodiments.
The present invention provides a pneumatic spray gun, as shown in fig. 1 to 5, comprising:
a first pipe body 1, one end of which is a first inlet; one end provided with the first inlet is provided with threads for connecting a spraying material input pipeline;
a second pipe body 6 connected to the other end of the first pipe body 1; the included angle formed by the axis of the second pipe body 6 and the axis of the first pipe body 1 is 110-150 degrees;
a third pipe 5 connected to the second pipe 6; the axis of the third tube 5 is parallel to the axis of the first tube 1;
a fourth tube 4 connected to the third tube 5; and a material outlet is arranged at one end of the fourth pipe body 4 and is used for spraying the spraying material.
The first inlet is for solid waste gel material to enter the lance and is therefore also referred to as the injection material inlet. The first pipe body 1, the third pipe body 5 and the fourth pipe body 4 are arranged in parallel, and the second pipe body 6 is arranged in an inclined mode.
In a preferred embodiment of the invention, the inner wall of said second tubular body 6 and the inner wall of said third tubular body 5 are provided with rifling.
The rifling is a spiral concave-convex line arranged in the tube body. According to the spray gun, the rifling lines are arranged on the inner walls of the second pipe body and the third pipe body, so that the pneumatic spray gun is not required to be driven by a motor, the high-speed rotation of the sprayed material in the gun barrel body can be realized under the driving of compressed air only through the inclined arrangement of the second pipe body 6 and the rifling line diversion in the pipe bodies, the materials in the pipe bodies can be uniformly stirred, the spraying speed of the sprayed material can be effectively improved, and the construction efficiency is improved. The rifling arrangement in the pneumatic lance may be of conventional design in the art and is not specifically limited in this disclosure.
In a preferred embodiment of the present invention, the axes of the first tube 1, the second tube 6, the third tube 5 and the fourth tube 4 are all in the same plane.
The four sections of pipe bodies are connected in sequence and all located in the same plane, and when the four sections of pipe bodies are projected from the plane, the axes of the four sections of pipe bodies are overlapped, as shown in the attached figure 2. The reason for this kind of structure is mainly based on two aspects, on one hand, the second tube 6 is set as an inclined tube, so that the second tube 6 and other tubes are set at a certain angle, this is to make the non-linear design to make proper resistance for the spraying material when the additive enters into the tube along with the compressed air, so that the additive and the spraying material will not be transported to the material outlet without sufficient agitation and the spraying material will not be uneven; on the other hand, the inclination angle of the second pipe body 6 is limited, so that the included angle formed by the second pipe body is not too large in bending, and the axial projections of the four sections of pipe bodies are overlapped, so that the resistance of the material in the spray gun is reduced, and the material is easy to spray.
In a preferred embodiment of the present invention, a second inlet is provided on the pipe wall of the second pipe body 6; the spray gun further comprises: the additive adding pipe 2 is connected with the second pipe body 6 through the second inlet; and the compressed air inlet pipe 3 is connected with the second pipe body 6 through the second inlet.
The admixture is not required to be added in advance in the wet mixing material, so that the problem that the material cannot be constructed due to quick setting of the admixture is avoided; the additive is added into the spray gun along with compressed air in the process of material injection, and through the pressure control of the compressed air and the structural arrangement of the spray gun, the additive and the injection material are rotationally stirred at a high speed along the angle of rifling in the second pipe body 6 and the third pipe body 5, are uniformly mixed, enter the fourth pipe body 4 and are injected out from a material outlet arranged at one end of the fourth pipe body 4.
The admixture adds the pipe 2 with the compressed air intake pipe 3 all pass through the second entry with the second body 6 is connected, the purpose of the entry is shared to the two can be in the admixture adds the very first time can carry the rotatory stirring of admixture, improves the mixed effect.
In a preferred embodiment of the present invention, the axis of the additive adding pipe 2 and the axis of the second pipe body 6 are located in the same plane, and form an included angle of 30 to 35 °.
The direction of the additive adding pipe 2 is set in order to allow the additive to be easily mixed with a spraying material when being added, and therefore, the included angle formed by the additive adding pipe is made to be smaller as much as possible so as to be well mixed; however, considering the operation convenience between the additive adding pipe 2 and the second pipe body 6 when the additive adding pipe is arranged, the included angle between the additive adding pipe and the second pipe body is preferably 30-35 degrees.
In a preferred embodiment of the present invention, the axis of the compressed air inlet pipe 3 and the axis of the second pipe 6 are arranged at an angle of 30-35 °, as shown in fig. 2; the axis of the compressed air inlet pipe 3 and the axis of the additive adding pipe 2 form an included angle of 30-35 degrees, as shown in the attached drawing 3.
The setting direction of the compressed air inlet pipe 3 is mainly used for controlling the wind direction. The angle of the included angle formed by the axis of the compressed air inlet pipe 3 and the axis of the second pipe body 6 is very critical. The smaller the included angle between the two is, the smaller the resistance when the compressed air enters the second pipe body is, and the more convenient the air inlet pipe is; however, if the included angle between the two is too small, on one hand, the arrangement of the pipeline is difficult, and on the other hand, the retention time of the compressed air at the elbow is too short, so that the compressed air may directly flow to the downstream along the rifling of the inner wall of the second pipe body, the effect of the compressed air on the rotating stirring of the additive is reduced, and the mixing effect of the additive is poor. According to the technical scheme, an included angle of 30-35 degrees is preferably formed between the two.
In a preferred embodiment of the present invention, the included angle formed by the axis of the second tube 6 and the axis of the first tube 1 is 120 ° to 125 °.
According to the technical scheme, the included angle formed by the second pipe body 6, the first pipe body 1 and the third pipe body 5 is controlled, meanwhile, the relative position relation among the additive adding pipe 2, the compressed air inlet pipe 3 and the second pipe body 6 is strictly limited, and a certain resistance is artificially arranged in the spray gun, so that the cementing material can be fully stopped in the spray gun, the materials are fully mixed, and the cementing material can be sprayed out before being coagulated. The spray gun can be used for fully mixing materials and well spraying solid waste gel materials.
In a preferred embodiment of the present invention, the first tube 1, the second tube 6, the third tube 5 and the fourth tube 4 are detachably connected to each other by screw threads, as shown in fig. 4 and 5.
The sections of the pipe bodies are detachably connected, so that the spray gun is convenient to clean and store; meanwhile, the connection adopts threaded connection, so that the quick connection can be conveniently realized on the construction site during construction.
In a preferred embodiment of the present invention, the first pipe 1, the second pipe 6 and the third pipe 5 are connected by welding; the fourth pipe 4 is detachably connected with the third pipe 5 through threads, as shown in fig. 4 and 5.
First body 1 second body 6 with third body 5 adopts the welded mode to connect, aims at reducing operating personnel's equipment operation at the job site, and it is more convenient and swift to operate. And adopt threaded connection between the fourth body 4 with the third body 5, it is more convenient to aim at considering the change of nozzle, makes the spray gun can be applicable to multiple different nozzles, conveniently sprays multiple different injection material.
In a preferred embodiment of the present invention, the first pipe body 1, the second pipe body 6, the third pipe body 5, the admixture adding pipe 2 and the compressed air inlet pipe 3 are all cylindrical structures; the fourth pipe body 4 is of a conical structure, one end of the fourth pipe body connected with the third pipe body 5 is a large end, and the end provided with the material outlet is a small end; the diameter of the small end is smaller than that of the large end.
The conical structure is arranged to increase the spraying speed of the spray gun to the solid waste cementing material.
In a preferred embodiment of the present invention, the size difference of the diameters of the first tube 1, the second tube 6 and the third tube 5 is less than or equal to 1%; the ratio of the small end diameter to the large end diameter of the fourth tube 4 is 1: 1.98-2.02; the ratio of the diameter of the additive adding pipe 2 to the diameter of the first pipe body 1 is 1: 4.95-5.05; the ratio of the diameter of the compressed air inlet pipe 3 to the diameter of the second pipe body 6 is 3: 99-101.
The diameters of the first pipe body 1, the second pipe body 6 and the third pipe body 5 and the diameter of the large end of the fourth pipe body 4 are required to be equal, so that the first pipe body, the second pipe body and the third pipe body can be well matched when being connected with each other. The ratio of the small end to the large end of the fourth pipe body 4 is about 1:2, so that the material outlet end of the fourth pipe body 4 is smaller, and the material spraying speed is increased. The additive adding pipe 2 is thin, and the diameter ratio of the additive adding pipe to the second pipe body 6 is about 1: 5; after the pipe diameter proportion and the flow rate of the material are matched, the proportion relation between the additive and the solid waste gel material in the optimum spraying material can be obtained. The compressed air conduit is the thinnest, has a diameter of only about three percent of the diameter of the second tube, and is preferably set based on the air supply and pressure levels of the injected material and the ability to thoroughly mix the material and inject the material at a high rate.
The pipe diameters of the first pipe body 1, the second pipe body 6, the third pipe body 5, the fourth pipe body 4, the additive adding pipe 2 and the compressed air inlet pipe 3 can be adjusted along with the yield design in unit time, and the sizes of the additive adding pipe and the compressed air inlet pipe can be scaled according to sectional areas in an equal proportion.
The invention also provides a spraying method of the solid waste cementing material, which applies the pneumatic spray gun in the previous embodiments and comprises the following steps: the solid waste gel material without the additive enters the spray gun through the first inlet, passes through the first pipe body and is conveyed to the second pipe body; the additive enters the second pipe body through the second inlet; compressed air enters the second pipe body through the second inlet; the compressed air carries the admixture to be sequentially stirred and mixed with the solid waste gel material in the second pipe body and the third pipe body, and the mixed material enters the fourth pipe body and is sprayed through the material outlet.
The features of the invention claimed and/or described in the specification may be combined, and are not limited to the combinations set forth in the claims by the recitations therein. The technical solutions obtained by combining the technical features in the claims and/or the specification also belong to the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536980.9A CN112657698B (en) | 2020-12-23 | 2020-12-23 | Pneumatic spray gun and method for spraying solid waste cementing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536980.9A CN112657698B (en) | 2020-12-23 | 2020-12-23 | Pneumatic spray gun and method for spraying solid waste cementing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112657698A true CN112657698A (en) | 2021-04-16 |
| CN112657698B CN112657698B (en) | 2025-08-01 |
Family
ID=75408084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011536980.9A Active CN112657698B (en) | 2020-12-23 | 2020-12-23 | Pneumatic spray gun and method for spraying solid waste cementing material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112657698B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978073A (en) * | 1985-06-28 | 1990-12-18 | Friedrich Wilh. Schwing Gmbh | Apparatus for pneumatically discharging liquified building material containing a hardener |
| JPH0320652U (en) * | 1989-07-06 | 1991-02-28 | ||
| JPH04357299A (en) * | 1991-06-03 | 1992-12-10 | Denki Kagaku Kogyo Kk | Dust eliminating pipe for spraying method |
| JPH0523562A (en) * | 1991-07-17 | 1993-02-02 | Denki Kagaku Kogyo Kk | Mixing pipe for spraying method |
| KR101216593B1 (en) * | 2012-10-29 | 2012-12-31 | (주)대우건설 | Mixed branch pipe for shotcrete construction equipment |
| CN106541496A (en) * | 2016-11-24 | 2017-03-29 | 陕西金石混凝土科技发展有限公司 | A kind of pneumatic aquation of dry concrete and accelerator mixed method and injection shower nozzle |
| CN111515043A (en) * | 2020-04-01 | 2020-08-11 | 山东柯信新材料有限公司 | Spray gun for wet spraying by utilizing supersonic airflow |
| CN112058525A (en) * | 2020-08-31 | 2020-12-11 | 山东大学 | Nozzle with built-in rifling, ejector and fuel cell hydrogen circulation system |
| CN214416733U (en) * | 2020-12-23 | 2021-10-19 | 中建材科创新技术研究院(山东)有限公司 | Pneumatic spray gun |
-
2020
- 2020-12-23 CN CN202011536980.9A patent/CN112657698B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978073A (en) * | 1985-06-28 | 1990-12-18 | Friedrich Wilh. Schwing Gmbh | Apparatus for pneumatically discharging liquified building material containing a hardener |
| JPH0320652U (en) * | 1989-07-06 | 1991-02-28 | ||
| JPH04357299A (en) * | 1991-06-03 | 1992-12-10 | Denki Kagaku Kogyo Kk | Dust eliminating pipe for spraying method |
| JPH0523562A (en) * | 1991-07-17 | 1993-02-02 | Denki Kagaku Kogyo Kk | Mixing pipe for spraying method |
| KR101216593B1 (en) * | 2012-10-29 | 2012-12-31 | (주)대우건설 | Mixed branch pipe for shotcrete construction equipment |
| CN106541496A (en) * | 2016-11-24 | 2017-03-29 | 陕西金石混凝土科技发展有限公司 | A kind of pneumatic aquation of dry concrete and accelerator mixed method and injection shower nozzle |
| CN111515043A (en) * | 2020-04-01 | 2020-08-11 | 山东柯信新材料有限公司 | Spray gun for wet spraying by utilizing supersonic airflow |
| CN112058525A (en) * | 2020-08-31 | 2020-12-11 | 山东大学 | Nozzle with built-in rifling, ejector and fuel cell hydrogen circulation system |
| CN214416733U (en) * | 2020-12-23 | 2021-10-19 | 中建材科创新技术研究院(山东)有限公司 | Pneumatic spray gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112657698B (en) | 2025-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110822424B (en) | Static air mixer | |
| CN214416733U (en) | Pneumatic spray gun | |
| CN102817622A (en) | Negative pressure type concrete wet-spray machine set | |
| CN206199545U (en) | A kind of concrete ejection shower nozzle | |
| KR100989428B1 (en) | The structure repair method of construction for which mortar, this injection equipment and this were used | |
| CN112657698A (en) | Pneumatic spray gun and method for spraying solid waste cementing material | |
| CN212508341U (en) | Pressurizing spray head for fully mixing additives | |
| CN103741938B (en) | The method of the quick wet shot of a kind of dry powder | |
| CN113663546A (en) | Multistage static mixer and use method thereof | |
| CN115350826A (en) | A rotary spray device | |
| CN206897686U (en) | A kind of eddy flow wind system for rotor-piston type concrete injection machine | |
| CN108661673A (en) | A kind of the concrete spraying machinery and gunnite method of joint pumping and whirlwind conveying | |
| CN214786066U (en) | A shotcrete sprinkler | |
| CN1781586A (en) | Single tube multiple swirler mixing device and its mixing operation method | |
| CN117549397A (en) | Rotatable multi-filament continuous fiber reinforced concrete 3D printing nozzle | |
| CN217416824U (en) | Novel clear stifled device of aggregate storehouse rod-type | |
| CN211936471U (en) | Double-shaft stirrer for treating electroplating sludge | |
| CN205277437U (en) | Rotatory wet blasting of dry shotcreting adds water installation | |
| CN104404961B (en) | Sprayed mortar water and accelerating admixture are automatically surely than induction system | |
| CN224024745U (en) | A conveying pipeline for lubricating oil production | |
| CN201560770U (en) | Guniting equipment | |
| CN213999970U (en) | Energy-conserving concrete water-reducing agent's of excelling in blending device | |
| CN207856700U (en) | Ammonia and air very-short-reach mixing apparatus | |
| CN223430183U (en) | A self-rotating stirring device for a material tray | |
| CN220696389U (en) | Quick detach formula venturi accelerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |