CN203834482U - Closed continuous secondary watering wet shotcreting system - Google Patents
Closed continuous secondary watering wet shotcreting system Download PDFInfo
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- CN203834482U CN203834482U CN201420080903.0U CN201420080903U CN203834482U CN 203834482 U CN203834482 U CN 203834482U CN 201420080903 U CN201420080903 U CN 201420080903U CN 203834482 U CN203834482 U CN 203834482U
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- water
- accelerating agent
- liquid accelerating
- closed continuous
- screw rod
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Abstract
The utility model discloses a closed continuous secondary watering wet shotcreting system which comprises a spraying device, a screw feeding device, a liquid state accelerator supplying device, a sprayer mixing device and a simple mechanical arm. A feeding port of the spraying device is communicated with an outlet of the screw feeding device, the spraying device is further connected with an outlet of the sprayer mixing device, and an inlet of the spray mixing device is connected with the mixture of water and a liquid state accelerator. The liquid state accelerator is supplied by the liquid state accelerator supplying device, an output end of the liquid state accelerator supplying device is connected with one input end of a tee joint device, the other input end of the tee joint device is connected to high-pressure water, an output end of the tee joint device is connected to an input end of the sprayer mixing device, and water valves are arranged on connecting pipelines of the tee joint device. Due to the fact that applicability of an existing wet spraying technology is lacking, the closed continuous secondary watering wet shotcreting system is provided, the wet spraying effect is achieved on the basis of original tide spraying, and the closed continuous secondary watering wet shotcreting system is controllable and adjustable, and reduces rebounding amount and dust amount in spraying construction.
Description
Technical field
The utility model relates to a kind of shotcrete technology system, is specifically related to a kind of novel closed continuous quadratic wet shotcreting system that adds water, and is mainly used in the sprayed mortar in geotechnical engineering, slope project and underground construction.
Background technology
Concrete-spraying technology is widely used in the support reinforcement of various country rocks tunnel and side slope.At present, mainly contain two kinds of methods of preparing sprayed mortar, i.e. dry shotcreting and wet shotcreting.Dry shotcreting is that dry mix (cement, aggregate and powder accelerator) is delivered to nozzle place by spraying machine under compressed air drives, and after adding water, is injected into and is subject to spray plane.Wet shotcreting is by wet mix (cement, aggregate and water), and the mode of being sent by pumping or wind by spraying machine is delivered to after nozzle place is mixed with liquid accelerating agent and is ejected into and is subject to spray plane.
Dry shotcreting is applied comparatively extensive at home and abroad.Its major advantage is that equipment is simple, and type is small and exquisite, transport and conveniently moving, and compound fed distance is long, and powder accelerator can add entering before spraying machine.But also have many intrinsic defects: 1. its work plane Dust Capacity and springback capacity are all larger, work under bad environment, has pulse phenomenon and the uniformity poor when material spray; 2. actual water ash mass ratio is difficult for accurately controlling, and affects the quality of sprayed mortar; 3. production efficiency is low.
Wet shotcreting major advantage is that springback capacity is low, and efficiency of construction is high, and inlet zone Dust Capacity is little, and homogeneity is good.Equally, it also has many weak points: 1. wet shotcreting construction technology is than dry shotcreting complex process, and material require is with following use, and match ratio, workability and pumping to material requires very high; 2. for the bad adaptability of humidity or water bearing ground; 3. to being difficult to the region construction of turnover, because machinery is huger, use very inconvenient, less to use amount engineering shortcoming flexibility; 4. the easy plugging of wet shotcreting, clear very inconvenient.
In practice of construction operation, require water and mix independent delivery owing to spraying spraying machine itself, mix at shower nozzle place, then eject, in high-speed motion, common dry spraying machine sprinkler design is simple, cannot ensure the abundant mixing of water material, cause dust large, the poor jeting effects such as resilience height, and severe contamination constructor's operating environment.
The mixing of water and mix whether fully, directly the jeting effect of the dry spray of impact, has determined the size of Dust Capacity and the height of springback capacity.In existing dry spraying machine facility, too simple for the design of shower nozzle, cannot meet the well-mixed requirement of water material.
Utility model content
For above prior art, for overcoming the deficiency of above-mentioned technology, the utility model provides a kind of closed continuous quadratic wet shotcreting system that adds water, can realize secondary adds water, on the basis of original tide spray, reach the effect of wet shot, effectively reduce springback capacity and the Dust Capacity of sprayed mortar, improve operating environment, reduce engineering time and cost, equipment is flexible simultaneously, easy construction, easy operating, is mainly applicable to the sprayed mortar in all kinds of chambers such as traffic tunnel, water conservancy tunnel, civil air defense constructions and installations, mine working and underground construction.
The utility model is achieved through the following technical solutions:
A kind of closed continuous quadratic wet shotcreting system that adds water, comprise injection apparatus, screw rod feeding device, shower nozzle mixing arrangement, the feeding mouth of described injection apparatus is communicated with the outlet of screw rod feeding device, the outlet of described injection apparatus is connected with shower nozzle mixing arrangement entrance, and the entrance of described shower nozzle mixing arrangement is for inputting the mixture of water and liquid accelerating agent.
Described liquid accelerating agent is supplied with by liquid accelerating agent feed system, and the output of liquid accelerating agent feed system connects an input of a three-way device, another input connection water under high pressure of three-way device; The output of three-way device connects the input of shower nozzle mixing arrangement, and is provided with water valve on its connecting line.
Described water under high pressure is communicated to screw rod feeding device by a water pump.
The shower nozzle of described shower nozzle mixing arrangement is by a robot support.
Described injection apparatus adopts sprayed mortar watering jet eductor, and it is carried out to encapsulation process, the other dust of reduction machine.
Described screw rod feeding device, its screw rod is total closed type, in screw rod feeding process, adds in advance part water, and concrete tide material is added water for the first time, concrete water content reaches 40% ~ 60%, and mix is better mixed with water, reduces dust.
Described liquid accelerating agent feed system, can add liquid accelerating agent in high-pressure water pipe, and accurately controls the addition of liquid accelerating agent, improves the performance of sprayed mortar each side.
Described shower nozzle mixing arrangement, comprises the water material mixing portion, two chambers mixing portion and the nozzle segment that are communicated with successively.
Described water material mixing portion comprises that two pipelines, water ring, water cavity, rubber pad, two hold formula scale valve, hold formula scale valve and be located at separately respectively on a pipeline for described two, the outlet of two pipelines is all communicated with same water cavity, and be provided with a water ring with the Exit Road of the logical pipeline of water, rubber pad is positioned at water cavity wall, play the effect of buffering, avoid concrete mixture to cause too large wearing and tearing to water cavity wall.
Hold formula scale valve for controlling accurately inflow, thereby reach the effect of controlling water/binder ratio, and by water ring, current can separate type mix in water cavity with mix, thereby reach good water material mixed effect;
Described two chambers mixing portion comprises two chambers rubber tube, forms two chambers hybrid chamber in the rubber tube of two chambers, and described two chambers rubber tube inwall is irregularly shaped.
Described irregularly shaped be zigzag, it causes cavity internal pressure to change by unexpected reducing effect, thereby water material is further fully mixed;
Described nozzle segment is the jet pipe of a lengthening, extends the water of high-speed motion and the time of contact of mix, ensures the full and uniform mixing of water material.
Described water material mixing portion, two chambers hybrid chamber part and nozzle segment, be all connected by standard thread interface, is convenient to maintenance and accessory.
The water ring interface of described water material mixing portion is that surrounding is stayed round-meshed metal ring, and current enter in water cavity by circular hole.
The rubber pad of described water material mixing portion is the sealing in order to ensure water cavity, prevents High-Pressure Water leakage.
Described water material mixing portion and nozzle segment are lightweight magnadure material, light and durable.
The design that is formed in one of described pair of chamber rubber tube structure, ensures the sealing of two chambers hybrid chamber, and ensures passing through smoothly of water material, avoids producing plugging.
Described nozzle segment comprises a hybrid chamber, ensures further fully mixing of water material.
Described manipulator, is a kind of movable supporting frame, can be by shower nozzle pillar, and flexible rotating, reduces labour.
Described liquid accelerating agent feedway, comprises liquid accelerating agent charging basket, trolley and screw type quantitative pump, and wherein, trolley top is provided with the support that can hold liquid accelerating agent charging basket, and liquid accelerating agent charging basket is shelved on support; Screw type quantitative pump is fixed on trolley, is positioned at liquid accelerating agent charging basket below, screw type quantitative pump by motor, be located at the manual frequency modulator on motor and the screw rod that is connected with motor forms, screw rod end is provided with discharging opening, is provided with charging aperture in the middle part of screw rod; Liquid accelerating agent charging basket bottom is provided with conveying pipeline, and the conveying pipeline other end is connected with charging aperture, and conveying pipeline is provided with the control valve that can control liquid accelerating agent flow.
Described liquid accelerating agent charging basket is marked with scale, can clearly see the reserves of liquid accelerating agent; A conveying pipeline is drawn in its bottom, and is installed on control valve, to control the flow of liquid accelerating agent, liquid accelerating agent is flowed in screw pump uniformly.Liquid accelerating agent charging basket can be designed as uncovered, is furnished with bung, to can repeat to add liquid accelerating agent, in construction, bung can prevent that accelerating admixture is contaminated.
Described trolley is a kind of running gear, is device conventional in prior art, and it is effectively combined as a whole liquid accelerating agent charging basket and screw type quantitative pump, and can promote walking, makes the supply of liquid accelerating agent become an independently structure.
Described screw type quantitative pump is a kind of weigh feeder, for device conventional in prior art, it can accurately control the addition of liquid accelerating agent: be always divided into ten apertures, under ten apertures, there are 20 revolutions, the flow often turning is fixed, by regulating its revolution, can effectively control the addition of liquid accelerating agent.
Liquid accelerating agent feedway of the present utility model, when use, discharging opening is connected with high-pressure water pipe, operating principle is: liquid accelerating agent flows out from liquid accelerating agent charging basket, regulate its flow through control valve, enter the charging aperture of screw type quantitative pump, provide pumping pressure by motor, through screw rod, by discharging opening force feed to high-pressure water pipe, thereby complete the supply of liquid accelerating agent.
The course of work of the present utility model is as follows:
Tide spice, by screw rod feeding device, in feeding process, stirs and adds water in advance, is delivered in spraying machine.Liquid accelerating agent joins in high-pressure water pipe by feed system, and mix and water, liquid accelerating agent converge in shower nozzle mixing arrangement, are together injected into and are subject to spray plane.
The utility model compared with prior art, has following outstanding advantages:
(1) the closed continuous quadratic of the present utility model wet shotcreting system that adds water, liquid accelerating agent is applied in damp spray technique, and can carries out adding water for twice, effectively reduce springback capacity and the Dust Capacity of sprayed mortar in construction, improve sprayed mortar quality, reduce labour hour and cost.
(2) screw rod feeding device, adopts total sealing device, in concrete feeding process, compound is carried out to prehydration, and concrete is fully mixed with water, avoids the generation of dust.
(3) liquid accelerating agent feed system, can accurately control the addition of liquid accelerating agent, has ensured the performance of sprayed mortar, as time of setting, intensity, durability etc.
(4) shower nozzle mixing arrangement adopts vortex principle, and concrete mix is fully mixed with water, liquid accelerating agent, improves sprayed mortar quality, reduces dust and resilience while injection.When use, current are by holding the accurate control of formula scale valve, and via the water pipe of both sides, under the effect of porous water ring, discrete type enters in water cavity, and mix tentatively mixes; And then enter two chambers hybrid chamber, by the reducing effectiveness of sudden change, change cavity internal pressure, thereby water material is further mixed; Complete last mixing via the hybrid chamber at nozzle place again, and by lengthening jet pipe, extend the time of contact of water material, ensure the full and uniform mixing of water material, thereby greatly reduce dust, reduce springback capacity, thereby improve ejection efficiency and jeting effect, ensured that construction operation personnel's is healthy.
(5) liquid accelerating agent feedway of the present utility model, is successfully applied in techmque liquid accelerating agent, and the use of liquid accelerating agent greatly reduces springback capacity and Dust Capacity, has improved working environment, has reduced construction cost.The use of screw type quantitative pump, can effectively control the addition of liquid accelerating agent: the addition of accelerating admixture has larger impact to the performance of sprayed mortar each side, as before final setting time, front later strength, adhesion strength, creeping property etc.This device makes the independently system that is added to of liquid accelerating agent, and can conveniently transport; Meanwhile, volume is little, does not take too many space.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the longitudinal plane structure schematic diagram of the utility model new type nozzle;
Fig. 3 is liquid accelerating agent feed system schematic diagram.
In figure, 1, damp spice; 2, screw rod feeding device; 3, spraying machine; 4, water under high pressure; 5, quantity of water metering meter; 6, liquid accelerating agent feedway; 7, three-way device; 8, concrete mix; 9, the mixture of water and liquid accelerating agent; 10, shower nozzle mixing arrangement; 11, water valve; 10-1. holds formula scale valve, 10-2. water pipe, 10-3. water ring, the two chambers of 10-4. hybrid chamber, the two chambers of 10-5. rubber tube, 10-6. jet pipe; 6-1. liquid accelerating agent charging basket, 6-2. small handcart, 6-3. screw type quantitative pump, 6-4. control valve, 6-5. conveying pipeline.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of closed continuous quadratic wet shotcreting system that adds water, comprises injection apparatus, screw rod feeding device 2, liquid accelerating agent feed system, shower nozzle mixing arrangement 10 and skeleton symbol manipulator.The feeding mouth of described injection apparatus is communicated with the outlet of screw rod feeding device, and described injection apparatus is also connected with the outlet of shower nozzle mixing arrangement, and the entrance of described shower nozzle mixing arrangement connects the mixture of water and liquid accelerating agent.
Liquid accelerating agent is supplied with by liquid accelerating agent feed system, and the output of liquid accelerating agent feed system connects an input of a three-way device 7, another input connection water under high pressure of three-way device 7; The output of three-way device connects the input of shower nozzle mixing arrangement, and on its connecting line, is provided with water valve 11.
Water under high pressure 4 is communicated to screw rod feeding device by a quantity of water metering meter 5.
The shower nozzle of shower nozzle mixing arrangement 10 is by a robot support.
Injection apparatus adopts sprayed mortar watering jet eductor, and it is carried out to encapsulation process, the other dust of reduction machine.
Described screw rod feeding device, its screw rod is total closed type, in screw rod feeding process, adds in advance part water, and concrete tide material is added water for the first time, concrete water content reaches 40% ~ 60%, and mix is better mixed with water, reduces dust.
This technique is used damp spice 1, and damp spice 1 is added in screw rod feeding device, enters in spraying machine along with screw rod stirs, and is delivered in shower nozzle mixing arrangement via pressure-air.High-pressure water pipe is divided into two-way, and a road supply screw rod carries out concrete mix and adds water for the first time, and another road adds at shower nozzle place, by manipulator control; Liquid accelerating agent feed system, the addition of energy accurate quantification accelerating admixture, by the pumping installations of self, liquid accelerating agent is pressed in the high-pressure water pipe at shower nozzle place, after liquid accelerating agent and water mix, one coexists in shower nozzle mixing arrangement mixes with mix, via skeleton symbol manipulator, is injected into and is subject to spray plane.
Tide spice 1, via the screw rod feeder 2 that adds water, stirs and adds water for the first time in feeding process, and amount of water is 40% ~ 60% of whole concrete water requirement, whole screw rod feeding device, for sealed, does not produce dust, then be transported in spraying machine 3, spraying machine is vacuum tightness pumped type.Water under high pressure 4 is divided into two-way, and the first via is integrated together via quantity of water metering meter 5 and the screw rod feeder 2 that adds water, and the second tunnel is directly connected with shower nozzle mixing arrangement 10, regulates amount of water by water valve 11.Liquid accelerating agent feedway 6 is connected with high-pressure water pipe by three-way device 7, liquid accelerating agent is pumped in water under high pressure 4, form the mixture 9 of liquid accelerating agent and water, the concrete mix 8 that contains 40% ~ 60% water together enters in shower nozzle mixing arrangement 10 with the mixture 9 of liquid accelerating agent and water, is together injected into and is subject to spray plane.
As shown in Figure 2, a kind of multiple mixing cavate of Novel dry spraying machine ejecting device for dry sprayed concrete construction operation, comprises water material mixing portion I, two chambers mixing portion II and nozzle segment III.
Wherein, water material mixing portion I comprises water pipe 10-2, water ring 10-3, water cavity, rubber pad, holds formula scale valve 10-1, hold formula scale valve and be located at separately respectively on a pipeline for described two, the outlet of two pipelines is all communicated with same water cavity, and be provided with a water ring with the Exit Road of the logical pipeline of water, rubber pad is positioned at water cavity wall, plays the effect of buffering, avoids concrete mixture to cause too large wearing and tearing to water cavity wall.Hold formula scale valve 10-1 for controlling accurately inflow, thereby reach the effect of controlling water/binder ratio, and by water ring, current can separate type mix in water cavity with mix, thereby reach good water material mixed effect.
Two chambers mixing portion II comprises two chamber rubber tube 10-5 and two chamber hybrid chamber 10-4, by dual unexpected reducing effect, causes cavity internal pressure to change, thereby water material is further fully mixed.
Nozzle segment III comprises the jet pipe 10-6 of lengthening, extends the water of high-speed motion and the time of contact of mix, ensures the full and uniform mixing of water material.
Water material mixing portion, two chambers hybrid chamber part and nozzle segment, be all connected by standard thread interface, is convenient to maintenance and accessory.
The water ring interface of water material mixing portion is that surrounding is stayed round-meshed metal ring, and current enter in water cavity by circular hole.The rubber pad of water material mixing portion is the sealing in order to ensure water cavity, prevents High-Pressure Water leakage.
Water material mixing portion and nozzle segment are lightweight magnadure material, light and durable.
The design that is formed in one of two chambers rubber tube structure, ensures the sealing of two chambers hybrid chamber, and ensures passing through smoothly of water material, avoids producing plugging.Nozzle segment comprises a hybrid chamber, ensures further fully mixing of water material.
As shown in Figure 3, liquid accelerating agent feedway, comprises liquid accelerating agent charging basket 6-1, trolley 6-2 and screw type quantitative pump 6-3, and wherein, trolley top is provided with the support that can hold liquid accelerating agent charging basket, and liquid accelerating agent charging basket is shelved on support; Screw type quantitative pump is fixed on trolley, is positioned at liquid accelerating agent charging basket below, screw type quantitative pump by motor, be located at the manual frequency modulator on motor and the screw rod that is connected with motor forms, screw rod end is provided with discharging opening, is provided with charging aperture in the middle part of screw rod; Liquid accelerating agent charging basket bottom is provided with conveying pipeline 6-4, and the conveying pipeline 6-4 other end is connected with charging aperture, and conveying pipeline is provided with the control valve 6-5 that can control liquid accelerating agent flow.
Liquid accelerating agent charging basket is marked with scale, can clearly see the reserves of liquid accelerating agent; A conveying pipeline is drawn in its bottom, and is installed on control valve, to control the flow of liquid accelerating agent, liquid accelerating agent is flowed in screw pump uniformly.Liquid accelerating agent charging basket can be designed as uncovered, is furnished with bung, to can repeat to add liquid accelerating agent, in construction, bung can prevent that accelerating admixture is contaminated.
Trolley is a kind of running gear, is device conventional in prior art, and it is effectively combined as a whole liquid accelerating agent charging basket and screw type quantitative pump, and can promote walking, makes the supply of liquid accelerating agent become an independently structure.
Screw type quantitative pump is a kind of weigh feeder, for device conventional in prior art, it can accurately control the addition of liquid accelerating agent: be always divided into ten apertures, under ten apertures, there are 20 revolutions, the flow often turning is fixed, by regulating its revolution, can effectively control the addition of liquid accelerating agent.
Liquid accelerating agent feedway, when use, discharging opening is connected with high-pressure water pipe, operating principle is: liquid accelerating agent flows out from liquid accelerating agent charging basket, regulate its flow through control valve, enter the charging aperture of screw type quantitative pump, provide pumping pressure by motor, through screw rod, by discharging opening force feed to high-pressure water pipe, thereby complete the supply of liquid accelerating agent.
Claims (10)
1. the closed continuous quadratic wet shotcreting system that adds water, it is characterized in that: comprise injection apparatus, screw rod feeding device, shower nozzle mixing arrangement, the feeding mouth of described injection apparatus is communicated with the outlet of screw rod feeding device, the outlet of described injection apparatus is connected with shower nozzle mixing arrangement entrance, and the entrance of described shower nozzle mixing arrangement is for inputting the mixture of water and liquid accelerating agent.
2. the closed continuous quadratic as claimed in claim 1 wet shotcreting system that adds water, it is characterized in that: described liquid accelerating agent is supplied with by liquid accelerating agent feedway, and the output of liquid accelerating agent feedway connects an input of a three-way device, another input of three-way device connects water under high pressure; The output of three-way device connects the input of shower nozzle mixing arrangement, and is provided with water valve on its connecting line.
3. the closed continuous quadratic as claimed in claim 2 wet shotcreting system that adds water, it is characterized in that: described liquid accelerating agent feedway, comprise liquid accelerating agent charging basket, trolley and screw type quantitative pump, wherein, trolley top is provided with the support that can hold liquid accelerating agent charging basket, and liquid accelerating agent charging basket is shelved on support; Screw type quantitative pump is fixed on trolley, is positioned at liquid accelerating agent charging basket below, screw type quantitative pump by motor, be located at the manual frequency modulator on motor and the screw rod that is connected with motor forms, screw rod end is provided with discharging opening, is provided with charging aperture in the middle part of screw rod; Liquid accelerating agent charging basket bottom is provided with conveying pipeline, and the conveying pipeline other end is connected with charging aperture, and conveying pipeline is provided with the control valve that can control liquid accelerating agent flow.
4. the closed continuous quadratic as claimed in claim 2 wet shotcreting system that adds water, is characterized in that: described water under high pressure is communicated to screw rod feeding device by a water pump.
5. the closed continuous quadratic as claimed in claim 1 wet shotcreting system that adds water, is characterized in that: described screw rod feeding device, its screw rod is total closed type.
6. the closed continuous quadratic as claimed in claim 1 wet shotcreting system that adds water, is characterized in that: the shower nozzle of described shower nozzle mixing arrangement is by a robot support, and described manipulator, is a kind of traversing carriage.
7. the closed continuous quadratic as claimed in claim 1 wet shotcreting system that adds water, is characterized in that: described shower nozzle mixing arrangement, comprises the water material mixing portion, two chambers mixing portion and the nozzle segment that are communicated with successively.
8. the closed continuous quadratic as claimed in claim 7 wet shotcreting system that adds water, it is characterized in that: described water material mixing portion comprises that two pipelines, water ring, water cavity, two hold formula scale valve, hold formula scale valve and be located at separately respectively on a pipeline for described two, the outlet of two pipelines is all communicated with same water cavity, and is being provided with a water ring with the Exit Road of the logical pipeline of water.
9. the closed continuous quadratic as claimed in claim 7 wet shotcreting system that adds water, it is characterized in that: described two chambers mixing portion comprises two chambers rubber tube, in the rubber tube of two chambers, form two chambers hybrid chamber, described two chambers rubber tube inwall is irregularly shaped.
10. the closed continuous quadratic as claimed in claim 7 wet shotcreting system that adds water, is characterized in that: described nozzle segment is the jet pipe of a lengthening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080903.0U CN203834482U (en) | 2014-02-25 | 2014-02-25 | Closed continuous secondary watering wet shotcreting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080903.0U CN203834482U (en) | 2014-02-25 | 2014-02-25 | Closed continuous secondary watering wet shotcreting system |
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| Publication Number | Publication Date |
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| CN203834482U true CN203834482U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080903.0U Expired - Fee Related CN203834482U (en) | 2014-02-25 | 2014-02-25 | Closed continuous secondary watering wet shotcreting system |
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| CN (1) | CN203834482U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821148A (en) * | 2014-02-25 | 2014-05-28 | 山东大学 | Sealed type continuous double water adding wet shotcreting system |
| CN104747212A (en) * | 2015-04-10 | 2015-07-01 | 成都力比特工程机械有限公司 | Novel concrete wet spraying machine |
-
2014
- 2014-02-25 CN CN201420080903.0U patent/CN203834482U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821148A (en) * | 2014-02-25 | 2014-05-28 | 山东大学 | Sealed type continuous double water adding wet shotcreting system |
| CN104747212A (en) * | 2015-04-10 | 2015-07-01 | 成都力比特工程机械有限公司 | Novel concrete wet spraying machine |
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Granted publication date: 20140917 Termination date: 20150225 |
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