CN115478539B - Device for spraying fiber concrete and construction method - Google Patents
Device for spraying fiber concrete and construction method Download PDFInfo
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- CN115478539B CN115478539B CN202210951562.9A CN202210951562A CN115478539B CN 115478539 B CN115478539 B CN 115478539B CN 202210951562 A CN202210951562 A CN 202210951562A CN 115478539 B CN115478539 B CN 115478539B
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- 239000000835 fiber Substances 0.000 title claims abstract description 126
- 239000004567 concrete Substances 0.000 title claims abstract description 125
- 238000005507 spraying Methods 0.000 title claims abstract description 64
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 305
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 128
- 238000002156 mixing Methods 0.000 claims abstract description 70
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000005086 pumping Methods 0.000 claims abstract description 43
- 238000007599 discharging Methods 0.000 claims abstract description 41
- 239000007921 spray Substances 0.000 claims abstract description 35
- 230000006835 compression Effects 0.000 claims abstract description 26
- 238000007906 compression Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims description 97
- 239000000203 mixture Substances 0.000 claims description 16
- 238000012806 monitoring device Methods 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 239000004568 cement Substances 0.000 description 9
- 239000004576 sand Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000011378 shotcrete Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007580 dry-mixing Methods 0.000 description 3
- 239000012615 aggregate Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007723 transport mechanism Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- 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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Architecture (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a device for spraying fiber concrete and a construction method, the device comprises a support frame and a grading material mixing and conveying system arranged in the support frame, the grading material mixing and conveying system is communicated with a dry material mixing and conveying system, a water supply system, a liquid accelerator conveying system, a concrete pumping device and an air compression device, and the grading material mixing and conveying system comprises: the wet material mixing and conveying device comprises a fiber discharging bin, a fiber feeding mechanism is arranged in the fiber discharging bin, a dry material conveying mechanism is arranged in a dry material mixing and conveying bin, a wet material conveying mechanism is arranged in a wet material mixing and conveying bin, a water supply mechanism is arranged at the top of the outer wall of the wet material mixing and conveying bin, the bottom of the wet material mixing and conveying bin is communicated with a concrete pumping device through a wet material discharging pipe, a concrete spray gun is arranged at the other end of the pressurizing mechanism in a communicating manner, and the concrete spray gun is communicated with a liquid accelerator conveying system. The invention not only can realize the long-distance conveying of materials, but also can spray high-quality fiber concrete with high efficiency and environmental protection.
Description
Technical Field
The invention relates to the technical field of concrete spraying equipment, in particular to a device for spraying fiber concrete and a construction method.
Background
The sprayed concrete has become a common support type in foundation pits, side slopes and underground engineering. At present, two methods of spraying concrete are mainly adopted, namely a dry spraying method and a wet spraying method. The dry spraying method is to mix the dry spraying slurry with the pressurized water in certain proportion and spray the mixture to the spray gun through pneumatic conveying. Although the dry spraying method has high spraying efficiency and can realize long-distance material conveying, as the concrete material synthesis in the dry spraying method is carried out at the spray gun of the conveying pipe in a short time, the materials are unevenly mixed, the rebound amount of the concrete sprayed on the construction surface is large, the dust is large, the health of constructors is threatened, and the construction quality cannot be effectively ensured. In view of the above problems with concrete dry spraying, wet spraying has been widely focused and employed in recent years. Wet spraying is to mix dry gunite and water into concrete in advance, then to convey the concrete to a spray gun by pumping mode to mix with liquid accelerator, and then to spray the concrete by wind pressure. Although the concrete wet spraying machine adopted in the current engineering can effectively solve the defects of uneven material mixing and large dust in a dry spraying method, the equipment generally has the problems of concrete blockage of a conveying pipe, unstable spraying quality, small spraying construction range, laborious construction operation and the like in use. The reason is that (1) the self-adhesive property of the concrete leads to the increase of pumping resistance when the slump of the concrete is smaller in construction, the failure of blocking a conveying pipe is easy to occur, and if the slump is larger, the sprayed concrete cannot be bonded on a sprayed surface in time, so that the construction quality is difficult to ensure; (2) The conveying distance of the concrete in the conveying pipe is too large, the pumping pressure loss is increased, the pipe blocking probability is obviously increased, and the material conveying distance can be reduced as much as possible during engineering application, so that the guniting construction range is limited; (3) The existing concrete wet spraying machine not only needs to moisten pipes before construction, but also needs to adopt a special device to clean a conveying pipeline after the spraying is finished, thereby being time-consuming and labor-consuming.
Compared with common concrete, the fiber concrete has better mechanical property, and the spray fiber concrete reinforcement technology is adopted in partial tunnel and slope engineering, so that better application effect is achieved. However, most of the current concrete spraying devices are designed and developed for common concrete, and have problems, so that the use effect of spraying fiber concrete is not ideal. The following problems can be summarized in general: (1) fiber in concrete is easy to agglomerate: the prior researches show that in order to ensure that the fibers are uniformly dispersed in the concrete and do not agglomerate, the thought that the fibers, the cement and the aggregate are firstly mixed in a dry mode and then added with water for wet mixing is preferably adopted, and if the prior concrete wet spraying machine is adopted, the process cannot be realized; (2) increased risk of pipe blockage: the working performance of the stirred fiber concrete is lower than that of common concrete, so that the pipe blockage risk of a conveying pipe of the existing wet spraying machine is greatly increased; (3) further narrowing the guniting range: because the risk of pipe blockage is increased, the material conveying distance is further shortened compared with the common concrete in construction, and the spraying range is further shortened synchronously; (4) If a dry spraying machine is adopted, the long-distance conveying of materials can be realized, the spraying range is enlarged, but the defects of large dust, uneven material mixing and the like cannot be avoided, and meanwhile, the risk of pipe blockage of a conveying pipe is increased due to the addition of fibers.
Accordingly, there is a need for an apparatus for spraying fiber concrete and a construction method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a device for spraying fiber concrete and a construction method thereof, which are used for solving the problems in the prior art, not only can realize the long-distance conveying of materials, but also can spray high-quality fiber concrete with high efficiency and environmental protection.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a device for spraying fiber concrete, which comprises a support frame and a graded material mixing and conveying system arranged in the support frame, wherein pulleys are fixedly connected to four corners of the bottom surface of the support frame respectively, the graded material mixing and conveying system is communicated with a dry material mixing and conveying system, a water supply system, a liquid accelerator conveying system, a concrete pumping device and an air compression device, and the graded material mixing and conveying system comprises:
the fiber conveying device comprises a fiber discharging bin, the top surface of the supporting frame is fixedly connected with the fiber discharging bin, a fiber feeding mechanism is arranged in the fiber discharging bin, and the bottom of the fiber discharging bin is communicated with one end provided with a fiber feeding pipe;
the dry material stirring and conveying device comprises a dry material stirring and conveying bin, the dry material stirring and conveying bin is fixedly connected to the middle of the supporting frame, the top of the dry material stirring and conveying bin is communicated with the other end of the fiber feeding pipe, a dry material conveying mechanism is arranged in the dry material stirring and conveying bin, the dry material stirring and conveying bin is communicated with the dry material mixing and conveying system through a feeding hole, and an air outlet is formed in the top surface of the dry material stirring and conveying bin;
the wet material stirring and conveying device comprises a wet material stirring and conveying bin, the wet material stirring and conveying bin is fixedly connected to the bottom of the supporting frame, the wet material stirring and conveying bin is communicated with the dry material stirring and conveying bin through a dry material discharging pipe, a wet material conveying mechanism is arranged in the wet material stirring and conveying bin, a water supply mechanism is arranged at the top of the outer wall of the wet material stirring and conveying bin, the water supply mechanism is communicated with the water supply system, and the bottom of the wet material stirring and conveying bin is communicated with the concrete pumping device through a wet material discharging pipe;
the pressurizing material conveying device comprises a wet material conveying pipe, one end of the wet material conveying pipe is communicated with the concrete pumping device, one end of a pressurizing mechanism is arranged at the other end of the wet material conveying pipe in a communicated mode, a concrete spray gun is arranged at the other end of the pressurizing mechanism in a communicated mode, and the concrete spray gun is communicated with the liquid accelerator conveying system.
Preferably, the fiber feeding mechanism comprises a feeding motor, the feeding motor is fixedly connected to the top surface of the fiber discharging bin, arc-shaped feeding openings are respectively formed in two sides of the top of the fiber discharging bin, an output end of the feeding motor penetrates through the top surface of the fiber discharging bin, a spiral conveying rod is fixedly connected to the top surface of the fiber discharging bin, the bottom of the spiral conveying rod is located in the fiber feeding pipe, a controller is fixedly connected to the top surface of the fiber discharging bin, and the controller is electrically connected with the feeding motor.
Preferably, the dry material transporting mechanism comprises a dry material motor fixedly connected to the side surface of the dry material stirring and delivering bin, the dry material motor penetrates through one end of a dry material main shaft fixedly connected to the side surface of the dry material stirring and delivering bin, the other end of the dry material main shaft is rotatably connected with the inner wall of the dry material stirring and delivering bin, and a dry material helical blade is fixedly connected to the outer wall of the dry material main shaft.
Preferably, the wet material transporting mechanism comprises a wet material motor, the wet material motor is fixedly connected to the side surface of the wet material stirring and conveying bin, the wet material motor penetrates through one end of a wet material main shaft fixedly connected to the side surface of the wet material stirring and conveying bin, the other end of the wet material main shaft is rotatably connected with the inner wall of the wet material stirring and conveying bin, and a wet material spiral blade is fixedly connected to the outer wall of the wet material main shaft.
Preferably, the water supply mechanism comprises a water bin, the water bin is arranged into an arc-shaped shell structure, the water bin is fixedly connected with the top of the outer wall of the wet material mixing and conveying bin, a plurality of water spraying holes are formed in the top of the inner cavity of the wet material mixing and conveying bin, a water outlet is formed in the bottom of the water bin, a plug is inserted into the water outlet, a water inlet is formed in the side face of the water bin, the water inlet is communicated with the water supply system through a pipeline, a flow monitoring device is arranged on the pipeline of the water supply system and communicated with the wet material mixing and conveying bin, and the bottom of the dry material discharging pipe penetrates through the water bin and the wet material mixing and conveying bin.
Preferably, at least one water spraying hole is arranged between any two adjacent blades of the wet material spiral blade.
Preferably, the pressurizing mechanism comprises a pressurizing pipe, two ends of the pressurizing pipe are respectively communicated with the wet conveying pipe and the conveying pipe through flanges, one end of the conveying pipe is communicated with the concrete spray gun, a plurality of air inlet pipes are circumferentially and equidistantly communicated on the wall of the pressurizing pipe, one end of each air inlet pipe penetrates through the wall of the pressurizing pipe and is provided with a strip-shaped inner groove, the strip-shaped inner groove is formed in the inner wall of the pressurizing pipe and circumferentially and equidistantly arranged, one end of the same pipe is communicated with the other end of each air inlet pipe, the other end of the pipe of each air inlet pipe is communicated with the air compression device and the air outlet through a three-way valve, and the air outlet and the high-pressure air pipe of the three-way valve are communicated with each other through a pressure measuring and stabilizing device.
Preferably, the air inlet pipe and the communicating position of the strip-shaped inner groove are obliquely arranged.
A construction method for spraying fiber concrete comprises the following steps:
s1, sequentially completing installation among a grading material mixing and conveying system, a dry material mixing and conveying system, a water supply system, a liquid accelerator conveying system, a concrete pumping device and an air compression device;
s2, starting a water supply system, a dry material stirring and conveying device, a wet material stirring and conveying device, a concrete pumping device and an air compression device, discharging clear water from the concrete pumping device into a wet material conveying pipe, and lubricating the whole wet material conveying pipe;
s3, starting a dry material mixing and conveying system and a fiber conveying device, closing an air compression device, conveying cement and sand and stone mixed materials uniformly in the dry material mixing and conveying system to a dry material stirring and conveying device through pneumatic conveying, dry-mixing the cement and sand and stone mixed materials with fibers added through the fiber conveying device, and conveying the fiber dry mixed materials to a wet material stirring and conveying device while stirring by a dry material main shaft and a dry material spiral blade driven by a dry material motor;
s4, adjusting a water supply system by utilizing a flow monitoring device according to the water consumption in the fiber concrete material mixing ratio set before construction, so that the water pressure at the water inlet is in a preset state; then water in the water bin is sprayed out from the water spraying hole, is stirred with the fiber dry mixed material in the wet material stirring bin, and is conveyed to the wet material discharging hole to enter the concrete pumping device;
s5, adjusting a pressure measuring and stabilizing device arranged on a high-pressure air pipe communicated with the air outlet hole and the three-way valve, so that the air pressure entering the pressurizing mechanism is kept constant, and conveying of the fiber concrete in the wet conveying pipe is realized by utilizing the dual functions of air flow and a concrete pumping device.
S6, starting a liquid accelerator conveying system and an air source externally connected with a concrete spray gun, and spraying out the fiber concrete and accelerator solution after uniformly mixing at the spray gun.
S7: judging the blockage situation of the wet material conveying pipe according to the pressure of a pressure measuring and stabilizing device arranged on the high-pressure air pipe; if the pipeline is blocked, closing the dry material mixing and conveying system and the fiber conveying device, and stopping the materials from entering the dry material stirring and conveying device; and opening a valve communicated with the air compression device by a three-way valve at the air inlet pipe, opening the air compression device, setting air pressure according to the pipeline blockage condition, increasing the water supply quantity of the water supply system, and finally realizing the relief of the pipeline blockage fault by stopping material input, increasing the water pressure and air pressure in a three-in-one dredging mode.
The invention discloses the following technical effects: the invention realizes the idea of mixing fiber, cement and aggregate uniformly by dry stirring and then adding water for wet stirring through the graded stirring conveying system, and the addition of fiber and water during stirring can be accurately controlled, and the fiber is prevented from agglomerating by stirring and conveying. According to the invention, a mode of combined dry mix wind pressure conveying and wet mix pumping pressurizing conveying is adopted, so that the material conveying distance is greatly increased on the premise that sprayed concrete does not generate dust, and the spraying working distance is obviously increased. The pumpability of the fiber concrete is reduced by adding the fiber into the concrete, and the resistance of the fiber concrete in a conveying pipe can be reduced and the pumping pressure can be increased by matching the concrete pumping device and the pressurizing material conveying device, so that the risk of pipe blockage of wet materials can be greatly reduced; in addition, through the cooperation of the dry mixing conveying system, the water supply system, the grading mixing conveying system, the concrete pumping device and the air compression device, the quick release of pipeline blockage faults can be realized. Before construction operation, only the water supply system and the concrete pumping device are used for lubricating the conveying pipe, and then the characteristics of independent work coordination and cooperation of all parts in the device are utilized to realize continuous supply and sustainable injection of fiber concrete; when the construction is finished, the whole device can be closed after the spray gun discharges clear water by stopping the feeding of the dry material mixing and conveying system, all materials are utilized without waste, and a special cleaning pipeline is not needed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing a structure of an apparatus for spraying fiber concrete according to the present invention;
FIG. 2 is a schematic diagram of a staged mixing delivery system in accordance with the present invention;
FIG. 3 is an axial view of the staged mixing conveyor system of the present invention;
FIG. 4 is an enlarged view of a portion of A1 of FIG. 2;
FIG. 5 is an enlarged view of a portion of A2 of FIG. 2;
FIG. 6 is an enlarged view of a portion of A3 of FIG. 3;
1, a supporting frame; 2. a pulley; 3. discharging the fibers into a bin; 4. a fiber feed tube; 5. dry material is mixed and sent to a bin; 6. a feed inlet; 7. an air outlet hole; 8. wet material is mixed and sent to a bin; 9. a dry material blanking pipe; 10. a wet material discharging pipe; 11. concrete pumping device; 12. a wet material conveying pipe; 13. a dry material mixing and conveying system; 14. a water supply system; 15. a liquid accelerator delivery system; 16. an air compression device; 17. a concrete spray gun; 18. a feed motor; 19. an arc-shaped charging port; 20. a screw conveyor rod; 21. a pressure measuring and stabilizing device; 22. a dry material motor; 23. a dry material main shaft; 24. dry material helical blades; 25. a wet material motor; 26. a wet material main shaft; 27. wet material helical blade; 28. a water bin; 29. a water spraying hole; 30. a water outlet; 31. a water inlet; 32. a flow monitoring device; 33. a pressurizing pipe; 34. a material conveying pipe; 35. an air inlet pipe; 36. a strip-shaped inner groove; 37. a three-way valve; 38. a high pressure gas pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1 to 6, the invention provides a device for spraying fiber concrete, which comprises a supporting frame 1 and a graded material mixing and conveying system arranged in the supporting frame 1, wherein pulleys 2 are fixedly connected to four corners of the bottom surface of the supporting frame 1 respectively, the graded material mixing and conveying system is communicated with a dry material mixing and conveying system 13, a water supply system 14, a liquid accelerator conveying system 15, a concrete pumping device 11 and an air compressing device 16, and the graded material mixing and conveying system comprises:
the fiber conveying device comprises a fiber discharging bin 3, the top surface of the supporting frame 1 is fixedly connected with the fiber discharging bin 3, a fiber feeding mechanism is arranged in the fiber discharging bin 3, and the bottom of the fiber discharging bin 3 is communicated with one end provided with a fiber feeding pipe 4;
the dry material stirring and conveying device comprises a dry material stirring and conveying bin 5, the dry material stirring and conveying bin 5 is fixedly connected to the middle of the support frame 1, the top of the dry material stirring and conveying bin 5 is communicated with the other end of the fiber feeding pipe 4, a dry material conveying mechanism is arranged in the dry material stirring and conveying bin 5, the dry material stirring and conveying bin 5 is communicated with a dry material mixing and conveying system 13 through a feeding hole 6, and an air outlet hole 7 is formed in the top surface of the dry material stirring and conveying bin 5;
the wet material stirring and conveying device comprises a wet material stirring and conveying bin 8, the wet material stirring and conveying bin 8 is fixedly connected to the bottom of the supporting frame 1, the wet material stirring and conveying bin 8 is communicated with the dry material stirring and conveying bin 5 through a dry material discharging pipe 9, a wet material conveying mechanism is arranged in the wet material stirring and conveying bin 8, a water supply mechanism is arranged at the top of the outer wall of the wet material stirring and conveying bin 8, the water supply mechanism is communicated with a water supply system 14, and the bottom of the wet material stirring and conveying bin 8 is communicated with a concrete pumping device 11 through a wet material discharging pipe 10;
the pressurizing material conveying device comprises a wet material conveying pipe 12, one end of the wet material conveying pipe 12 is communicated with the concrete pumping device 11, one end of the wet material conveying pipe 12 is communicated with a pressurizing mechanism, the other end of the pressurizing mechanism is communicated with a concrete spray gun 17, and the concrete spray gun 17 is communicated with the liquid accelerator conveying system 15.
The invention realizes the idea of mixing fiber, cement and aggregate uniformly by dry stirring and then adding water for wet stirring through the graded stirring conveying system, and the addition of fiber and water during stirring can be accurately controlled, and the fiber is prevented from agglomerating by stirring and conveying. According to the invention, a mode of combined dry mix wind pressure conveying and wet mix pumping pressurizing conveying is adopted, so that the material conveying distance is greatly increased on the premise that sprayed concrete does not generate dust, and the spraying working distance is obviously increased. The pumpability of the concrete is reduced by adding the fiber, the resistance of the fiber concrete in the conveying pipe 34 can be reduced and the pumping pressure can be increased by matching the concrete pumping device 11 with the pressurizing material conveying device, so that the risk of pipe blockage of wet materials can be greatly reduced; in addition, through the mutual cooperation of the dry mixed material conveying system, the water supply system 14, the grading mixed material conveying system, the concrete pumping device 11 and the air compression device 16, the quick release of the pipeline blockage faults can be realized. Before construction operation, only the water supply system 14 and the concrete pumping device 11 are used for lubricating the material conveying pipe 34, and then the continuous supply and sustainable injection of fiber concrete are realized by utilizing the characteristic that all parts in the device work independently and cooperatively; when the construction is finished, the whole device can be closed only by stopping feeding of the dry material mixing and conveying system 13 and discharging clear water from the spray gun, all materials are utilized without waste, and a special cleaning pipeline is not needed.
The dry material mixing and conveying system 13 is a material mixing and conveying device of a common concrete dry spraying machine, and quantitatively conveys cement and sand and stone dry mixed materials into the dry material mixing and conveying device through a dry material conveying pipe by means of wind pressure and a control valve; the water supply system 14 is a continuous high-pressure water supply device, and can acquire a feedback signal of the flow monitoring device to realize real-time adjustment of the water inflow and the water pressure in the wet material mixing and delivering bin 8; the air compression device 16 can realize remote control of the output air flow pressure; the liquid accelerator conveying system 15 provided in the technical scheme is a liquid accelerator conveying system of a concrete wet spraying machine in the prior art, and is used for mixing accelerator and fiber concrete at a concrete spray gun 17. The foregoing is prior art in the art, and thus will not be described in detail.
Further optimizing scheme, fiber feed mechanism includes feeding motor 18, and feeding motor 18 rigid coupling is at the top surface of feed bin 3 under the fiber, and arc charge door 19 has been seted up respectively to the top both sides of feed bin 3 under the fiber, and the output of feeding motor 18 runs through the top surface rigid coupling of feed bin 3 under the fiber and has screw conveyer pole 20, and screw conveyer pole 20's bottom is located fiber inlet pipe 4, and the top surface rigid coupling of feed bin 3 under the fiber has the controller, controller and feeding motor 18 electric connection.
The fiber conveying device is provided with a feeding motor 18 and a controller for controlling the conveying amount of the fibers, and the fibers in the fiber discharging bin 3 are uniformly conveyed into the dry material stirring and conveying device through a spiral conveying rod 20.
Further optimizing scheme, drier transport mechanism includes drier motor 22, and drier motor 22 rigid coupling is in the side of drier stirring send storehouse 5, and drier motor 22 runs through drier stirring send storehouse 5 side rigid coupling and has the one end of drier main shaft 23, and the other end of drier main shaft 23 is connected with drier stirring send storehouse 5 inner wall rotation, and the rigid coupling has drier helical blade 24 on the outer wall of drier main shaft 23.
The dry material motor 22 drives the dry material main shaft 23 and the dry material helical blade 24 to uniformly mix the cement, the dry sand and the fiber conveyed by the fiber conveying device and convey the mixture into the wet material mixing and conveying device.
Further optimizing scheme, wet material transport mechanism includes wet material motor 25, wet material motor 25 rigid coupling in wet material mix send the side of storehouse 8, and wet material motor 25 runs through wet material mix send the one end that storehouse 8 side rigid coupling had wet material main shaft 26, and wet material main shaft 26's the other end and wet material mix send the storehouse 8 inner wall rotation to be connected, and the rigid coupling has wet material helical blade 27 on the outer wall of wet material main shaft 26.
Further optimizing scheme, water supply mechanism includes water sump 28, water sump 28 sets up to arc shell structure, water sump 28 rigid coupling is at wet material stirring and is sent storehouse 8 outer wall top, a plurality of water spray holes 29 have been seted up at wet material stirring and send storehouse 8 inner chamber top, outlet 30 has been seted up to water sump 28 bottom, peg graft in the outlet 30 has the end cap, water inlet 31 has been seted up to water sump 28's side, water inlet 31 communicates with water supply 14 through the pipeline, be provided with flow monitoring device 32 on the pipeline that communicates water inlet 31 and water supply 14, the bottom of dry material unloading pipe 9 runs through water sump 28 and wet material stirring and send storehouse 8 intercommunication.
The water supply system 14 is connected with a water inlet 31 of the water bin 28, water flows out through a water spray hole 29, and the wet material motor 25 drives the wet material main shaft 26 and the wet material spiral blade 27 to be matched so as to realize uniform mixing of the fiber concrete.
Further preferably, at least one water spraying hole 29 is arranged between any two adjacent wet material spiral blades 27.
The water spraying holes 29 are uniformly distributed on the top of the inner wall of the wet material mixing and delivering bin 8, and the water spraying amount can be controlled by a flow monitoring device 32 between the water supply system 14 and the wet material mixing and delivering device so as to control the slump of the fiber concrete.
Further optimizing scheme, booster mechanism includes booster pipe 33, booster pipe 33's both ends are respectively through flange and wet material conveyer pipe 12 and conveying pipeline 34 intercommunication, conveying pipeline 34's one end and concrete spray gun 17 intercommunication, circumference equidistant intercommunication is provided with a plurality of intake pipes 35 on the booster pipe 33 pipe wall, booster pipe 33 pipe wall intercommunication is provided with bar inside groove 36 in one end of intake pipe 35, a plurality of bar inside groove 36 are offered on booster pipe 33 inner wall and circumference equidistant setting, the other end intercommunication of a plurality of intake pipes 35 has the one end of same pipeline, the other end of the pipeline of a plurality of intake pipes 35 of intercommunication is through high-pressure air pipe 38 and air compressor arrangement 16 and venthole 7 intercommunication respectively, be provided with pressure measurement pressure stabilizing device 21 on the high-pressure air pipe 38 of intercommunication venthole 7 and three-way valve 37.
One end of the concrete pumping device 11 is connected with a discharge hole of the wet material stirring and conveying device, the other end of the concrete pumping device is connected with the wet material conveying pipe 12, the wet material conveying pipe 12 is connected with a pressurizing and conveying device through a flange, a high-pressure air inlet pipe 35 on the pressurizing and conveying device is connected with an air outlet hole 7 and an air compressor on the dry material stirring and conveying device, and the high-pressure air inflow can be used for conveying fiber concrete materials in the wet material conveying pipe 12.
The pressure measuring and stabilizing device 21 is arranged on the gas pipe between the high-pressure gas inlet pipe 35 of the pressurizing material conveying device and the gas outlet hole 7 of the dry material mixing and conveying device, and is used for adding stable gas pressure into the pressurizing material conveying device and judging whether the wet material conveying pipe 12 is blocked or not through abnormal reaction of the pressure monitoring device.
The concrete spray gun 17 is a concrete wet spraying machine spray gun, and is the prior art, so redundant description will not be made.
In a further optimized scheme, the communicating position of the air inlet pipe 35 and the strip-shaped inner groove 36 is obliquely arranged.
A construction method for spraying fiber concrete comprises the following steps:
s1, sequentially completing the installation of a grading material mixing and conveying system, a dry material mixing and conveying system 13, a water supply system 14, a liquid accelerator conveying system 15, a concrete pumping device 11 and an air compression device 16;
the dry material mixing and conveying system 13 is communicated with a feed inlet 6 of the dry material mixing and conveying device, the water supply system 14 is connected with a water inlet 31 of the wet material mixing and conveying device, the concrete pumping device 11, the pressurizing and conveying device and the concrete spray gun 17 are sequentially connected, an air outlet 7 of the dry material mixing and conveying device is connected with one interface of a three-way valve 37 on an air inlet pipe 35 of the pressurizing and conveying device through a high-pressure air pipe 38, and the air compression device 16 is connected with the other interface of the three-way valve 37 at the air inlet pipe 35 of the pressurizing and conveying device through the high-pressure air pipe 38.
S2, starting a water supply system 14, a dry material stirring and conveying device, a wet material stirring and conveying device, a concrete pumping device 11 and an air compression device 16, discharging clear water from the concrete pumping device 11 into a wet material conveying pipe 12, and lubricating the whole wet material conveying pipe 12 by controlling the air compression device 16 to generate a driving effect of high-pressure air flow;
s3, starting the dry material mixing and conveying system 13 and the fiber conveying device, closing the air compression device 16, conveying the cement and sand stone mixture uniformly mixed in the dry material mixing and conveying system 13 to the dry material stirring and conveying device through pneumatic conveying, dry-mixing the cement and sand stone mixture with the fibers added through the fiber conveying device, and driving the dry material main shaft 23 and the dry material spiral blade 24 to convey the fiber dry material to the wet material stirring and conveying device through the dry material motor 22;
s4, according to the water consumption in the fiber concrete material mixing ratio set before construction, the water supply system 14 is regulated by the flow monitoring device 32, so that the water pressure at the water inlet 31 is in a preset state; then water with stable pressure and flow in the water bin 28 is sprayed out from the water spraying hole 29, is stirred with the fiber dry mixed material in the wet material stirring and delivering bin 8, and is delivered to a wet material discharging hole to enter the concrete pumping device 11;
s5, a pressure measuring and stabilizing device 21 is arranged on a high-pressure air pipe 38 which is used for adjusting and communicating the air outlet 7 and the three-way valve 37, so that the air pressure entering the pressurizing mechanism is kept constant, and the conveying of the fiber concrete in the wet conveying pipe 12 is realized by utilizing the dual functions of air flow and the concrete pumping device 11.
S6, starting an air source externally connected with the liquid accelerator conveying system 15 and the concrete spray gun 17, and spraying out the fiber concrete and accelerator solution after uniformly mixing at the spray gun.
S7: the blockage situation of the wet material conveying pipe 12 is judged by the pressure of the pressure measuring and stabilizing device 21 arranged on the high-pressure air pipe 38; if the pipeline is blocked, closing the dry material mixing and conveying system 13 and the fiber conveying device, and stopping the materials from entering the dry material mixing and conveying device; and opening a valve communicated with the air compression device 16 by a three-way valve 37 at the air inlet pipe 35, opening the air compression device 16, setting air pressure according to the pipeline blockage situation, increasing the water supply quantity of the water supply system 14, and finally realizing the relief of the pipeline blockage fault by stopping material input, increasing the water pressure and the air pressure in a three-in-one dredging mode.
It should be noted that, in combination with specific site conditions based on the basic principle of convenience during construction, the pressurizing and transporting device is flexibly added on the wet material conveying pipe 12, so that on one hand, the pressurizing and transporting device can be used for increasing the conveying distance of the wet material section, and on the other hand, when the pipeline is blocked, the pressure measuring and stabilizing devices 21 installed in front of the pressurizing and transporting device are utilized for judging the specific position of the blocked pipeline, so as to realize the purposes of grading and sectionally dredging the wet material conveying pipe 12.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (8)
1. The utility model provides a device for spraying fiber concrete, includes support frame (1) and sets up hierarchical mix material conveying system in support frame (1), hierarchical mix material conveying system intercommunication is provided with drier mixture conveying system (13), water supply system (14), liquid accelerator conveying system (15), concrete pumping device (11) and air compression device (16), its characterized in that, hierarchical mix material conveying system includes:
the fiber conveying device comprises a fiber discharging bin (3), the top surface of the supporting frame (1) is fixedly connected with the fiber discharging bin (3), a fiber feeding mechanism is arranged in the fiber discharging bin (3), and one end of a fiber feeding pipe (4) is arranged at the bottom of the fiber discharging bin (3) in a communicating manner;
the dry material stirring and conveying device comprises a dry material stirring and conveying bin (5), the dry material stirring and conveying bin (5) is fixedly connected to the middle of the supporting frame (1), the top of the dry material stirring and conveying bin (5) is communicated with the other end of the fiber feeding pipe (4), a dry material conveying mechanism is arranged in the dry material stirring and conveying bin (5), the dry material stirring and conveying bin (5) is communicated with the dry material mixing and conveying system (13) through a feeding hole (6), and an air outlet (7) is formed in the top surface of the dry material stirring and conveying bin (5);
the wet material stirring and conveying device comprises a wet material stirring and conveying bin (8), the wet material stirring and conveying bin (8) is fixedly connected to the bottom of the supporting frame (1), the wet material stirring and conveying bin (8) is communicated with the dry material stirring and conveying bin (5) through a dry material discharging pipe (9), a wet material conveying mechanism is arranged in the wet material stirring and conveying bin (8), a water supply mechanism is arranged at the top of the outer wall of the wet material stirring and conveying bin (8), the water supply mechanism is communicated with the water supply system (14), and the bottom of the wet material stirring and conveying bin (8) is communicated with the concrete pumping device (11) through a wet material discharging pipe (10);
the pressurizing material conveying device comprises a wet material conveying pipe (12), one end of the wet material conveying pipe (12) is communicated with the concrete pumping device (11), one end of the wet material conveying pipe (12) is communicated with one end provided with a pressurizing mechanism, the other end of the pressurizing mechanism is communicated with a concrete spray gun (17), and the concrete spray gun (17) is communicated with the liquid accelerator conveying system (15);
the utility model provides a wet material conveying device, including wet material conveying pipe (12) and conveying pipeline (34), including booster pipe (33), booster pipe (33) both ends respectively through the flange with wet material conveying pipe (12) and conveying pipeline (34) intercommunication, conveying pipeline (34) one end with concrete spray gun (17) intercommunication, circumference equidistant intercommunication is provided with a plurality of intake pipes (35) on booster pipe (33) pipe wall, the one end of intake pipe (35) runs through booster pipe (33) pipe wall intercommunication is provided with bar inside groove (36), a plurality of bar inside groove (36) are seted up on booster pipe (33) inner wall and circumference equidistant setting, a plurality of the other end intercommunication of intake pipe (35) has the one end of same pipeline, a plurality of the other end of pipeline of intake pipe (35) are through three-way valve (37) respectively through high-pressure air pipe (38) with air compression device (16) and hole (7) intercommunication, the intercommunication air outlet hole (7) with be provided with pressure measurement steady device (21) on high-pressure air pipe (38) of three-way valve (37).
2. An apparatus for spraying fiber concrete according to claim 1, wherein: the fiber feeding mechanism comprises a feeding motor (18), wherein the feeding motor (18) is fixedly connected to the top surface of a fiber discharging bin (3), arc-shaped charging openings (19) are respectively formed in two sides of the top of the fiber discharging bin (3), an output end of the feeding motor (18) penetrates through the top surface of the fiber discharging bin (3) and is fixedly connected with a spiral conveying rod (20), the bottom of the spiral conveying rod (20) is located in a fiber feeding pipe (4), and a controller is fixedly connected to the top surface of the fiber discharging bin (3) and is electrically connected with the feeding motor (18).
3. An apparatus for spraying fiber concrete according to claim 2, wherein: the dry material conveying mechanism comprises a dry material motor (22), the dry material motor (22) is fixedly connected to the side face of the dry material stirring and conveying bin (5), the dry material motor (22) penetrates through one end of a dry material main shaft (23) fixedly connected to the side face of the dry material stirring and conveying bin (5), the other end of the dry material main shaft (23) is rotatably connected with the inner wall of the dry material stirring and conveying bin (5), and a dry material helical blade (24) is fixedly connected to the outer wall of the dry material main shaft (23).
4. A device for spraying fiber concrete according to claim 3, wherein: the wet material conveying mechanism comprises a wet material motor (25), the wet material motor (25) is fixedly connected to the side face of the wet material stirring and conveying bin (8), the wet material motor (25) penetrates through one end of a wet material main shaft (26) fixedly connected to the side face of the wet material stirring and conveying bin (8), the other end of the wet material main shaft (26) is rotatably connected with the inner wall of the wet material stirring and conveying bin (8), and wet material spiral blades (27) are fixedly connected to the outer wall of the wet material main shaft (26).
5. An apparatus for spraying fiber concrete according to claim 4, wherein: the water supply mechanism comprises a water bin (28), the water bin (28) is arranged to be of an arc-shaped shell structure, the water bin (28) is fixedly connected to the top of the outer wall of the wet material stirring and conveying bin (8), a plurality of water spray holes (29) are formed in the top of the inner cavity of the wet material stirring and conveying bin (8), a water outlet (30) is formed in the bottom of the water bin (28), a plug is inserted into the water outlet (30), a water inlet (31) is formed in the side face of the water bin (28), the water inlet (31) is communicated with the water supply system (14) through a pipeline, a flow monitoring device (32) is arranged on the pipeline of the water supply system (14) and is communicated with the wet material stirring and conveying bin (8), and the bottom of the dry material discharging pipe (9) penetrates through the water bin (28).
6. An apparatus for spraying fiber concrete according to claim 5, wherein: at least one water spraying hole (29) is arranged between any two adjacent blades of the wet material spiral blade (27).
7. An apparatus for spraying fiber concrete according to claim 6, wherein: the air inlet pipe (35) is obliquely arranged at the communication position of the strip-shaped inner groove (36).
8. A construction method for spraying fiber concrete, an apparatus for spraying fiber concrete according to claim 7, comprising the steps of:
s1, sequentially completing the installation of a grading material mixing and conveying system, a dry material mixing and conveying system (13), a water supply system (14), a liquid accelerator conveying system (15), a concrete pumping device (11) and an air compression device (16);
s2, starting a water supply system (14), a dry material stirring and conveying device, a wet material stirring and conveying device, a concrete pumping device (11) and an air compression device (16), discharging clear water from the concrete pumping device (11) into a wet material conveying pipe (12), and lubricating the whole wet material conveying pipe (12);
s3, starting a dry material mixing and conveying system (13) and a fiber conveying device, closing an air compression device (16), and conveying the fiber dry material to a wet material mixing and conveying device through a dry material conveying mechanism while stirring;
s4, adjusting a water supply system (14) by utilizing a flow monitoring device (32), spraying water in a water bin (28) from a water spraying hole (29), stirring the water and the fiber dry mixed material in a wet material stirring and delivering bin (8), and delivering the water and the fiber dry mixed material to a concrete pumping device (11) through a wet material conveying mechanism;
s5, adjusting a pressure measuring and stabilizing device (21) to ensure that the air pressure entering the pressurizing mechanism is kept constant, and conveying the fiber concrete in the wet material conveying pipe (12) by utilizing the dual functions of air flow and the concrete pumping device (11);
s6, starting a liquid accelerator conveying system (15) and an air source externally connected with a concrete spray gun (17), and spraying out fiber concrete and accelerator solution after uniformly mixing at the concrete spray gun (17);
s7: if the pipeline is blocked, closing the dry material mixing and conveying system (13) and the fiber conveying device, and stopping the materials from entering the dry material stirring and conveying device; and opening a valve communicated with the air compression device (16) by the three-way valve (37), opening the air compression device (16), increasing the water supply amount of the water supply system (14), and finally realizing the release of the pipeline blockage fault by stopping material input, increasing the water pressure and the air pressure in a three-in-one dredging mode.
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| CN202210951562.9A CN115478539B (en) | 2022-08-09 | 2022-08-09 | Device for spraying fiber concrete and construction method |
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| CN202210951562.9A CN115478539B (en) | 2022-08-09 | 2022-08-09 | Device for spraying fiber concrete and construction method |
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