Low-pressure conveying spraying device

Abstract

The invention discloses a low-pressure conveying spraying device. The low-pressure conveying spraying device comprises a first set of pressure conveying system, a second set of pressure conveying system, a third set of pressure conveying system, a first valve, a second valve, a third valve, a static mixer and a spray nozzle. The static mixer is provided with an A component feed inlet and a B component feed inlet on a main mixing pipe. A feeding opening is formed in one end of the main mixing pipe, and a discharge hole is formed in the other end of the main mixing pipe. The output end of the first set of pressure conveying system is connected to the first valve, and the other end of the first valve is connected to the A component feed inlet on the static mixer. The output end of the secondset of pressure conveying system is connected to the second valve, and the other end of the second valve is connected to the feeding opening on the static mixer. The output end of the third set of pressure conveying system is connected to the third valve, and the other end of the third valve is connected to the B component feed inlet on the static mixer. The discharge hole on the static mixer is connected to the spray nozzle. The low-pressure conveying spraying device can effectively and fully mix fluid base stock with two or more components in real time, thereby achieving one-time continuoushigh-quality and high-efficiency rapid spraying operation.

Description

technical field [0001] The invention discloses a low-pressure conveying and spraying device, which belongs to the field of road surface, bridge, ground road construction equipment and the field of wall surface, waterproof and other building construction equipment. It is suitable for spraying fluids with two or more components, especially It is used to spray two-component methyl methacrylate (MMA) high-strength polymer. Background technique [0002] The two-component material with methyl methacrylate as the main component is the best pavement material in the world today. It is safe and environmentally friendly, fast curing, strong adhesion, durable, strong warning, good economy, good toughness, and durability. Acid-base, anti-aging, anti-ultraviolet and other characteristics, and can be quickly cured at low temperature (below zero), suitable for all roads, expressways, express motorways, urban roads, vibration markings, rain lines, etc. Plays an important role in road traffi...

AI Technical Summary

Problems solved by technology

[0003] However, because of the particularity of the two-component material itself, as far as the construction of the two-component material (or multi-component material) is concerned, there has been no equipment and device that can complete the construction of the two-component material for a long time.

[0004] At present, the spraying equipment for road construction of methyl methacrylate high-strength polymers is two spraying machines, one spraying machine is connected with A-component base material (such as Degu 660A marking paint currently sold in the market), and the other is spraying Machine-connected component B base material (such as Degu 660B marking paint currently sold in the market), one sprayer sprays component A base material, and the other sprayer immediately sprays component B base material (that is, sprays first Component A base material, and then spray component B base material on the coating of component A base material), the problems of this kind of road spraying equipment are: 1. The construction is difficult (in the case that component A cannot be dried, it must Immediately spray component B again); 2. It is difficult to achieve complete equal coverage and superposition of the sprayed component A base material and component B base material; the coverage and superposition of the two components are not uniform, and the cured coating will be uneven , Uneven curing means that there will be uneven coating strength in future use, reflecting that some places on the road surface are well maintained and others are easily damaged; 3. Part A base material and B component are prone to appear The base material does not overlap (because the base material of component A and the base material of component B are sprayed on the ground separately before and after, and the two components cannot be completely mixed evenly); Two-component crosslinking reaction, that is, the coating on the unsuperimposed part is always in the state of one-component base material, and the one-component base material coating does not have the basic functions of two-component pavement coatings such as strong adhesion and good wear resistance; 4. Construction personnel need to stop regularly to add base material to the sprayer; the existence of the above problems has led to the inability to achieve a continuous, high-efficiency, high-quality and rapid spraying of methyl methacrylate (MMA) high-strength polymers in road construction for a long time Operation;

[0005] The spraying equipment for road construction of methyl methacrylate high-strength polymer can also be a spraying machine. At this time, component A base material and B component base material (or multi-component base material) are directly added to the paint bucket Stir and mix evenly and then connect to the spraying machine. The problem with this kind of road spraying equipment is: the mixture of component A base material and component B base material must be sprayed immediately, otherwise, once the mixture in the paint bucket reacts, the spraying It will become more and more difficult, because once the mixture enters the reaction state, the viscosity will increase with time, the mixture will solidify in the spraying equipment, and eventually cause the spraying equipment to fail to work. At this time, the equipment must be cleaned and replaced. Only the remixed mixture can continue to work. The problem of frequent solidification or frequent addition of base materials has also caused road construction to be unable to achieve a continuous high-efficiency, high-quality, and rapid production of methyl methacrylate (MMA) two-component high-strength polymers for a long time. spraying operations;

This kind of mixing method has strict requirements on the position setting of the two spray guns. If there is a slight misalignment, the full and proportional mixing of the base materials cannot be achieved, so that the sprayed line cannot meet the construction requirements; and in actual construction, due to wind speed, Influenced by airflow and other factors, the two-gun spray paint in the state of external spraying and external mixing cannot be fully and uniformly mixed, that is, the two-component base material mixing equipment of this structure cannot really realize the two-component base material in space or on the ground. The sufficient and uniform mixing of the above-mentioned first case will occur, and a continuous high-efficiency, high-quality and fast spraying operation of methyl methacrylate (MMA) high-strength polymers cannot be realized;

[0008] The other is Chinese patent application CN103526683, which discloses a self-propelled two-component external mixing labeling line equipment, including two base material boxes, respectively put the A component base material and the B component base material into the corresponding base material. In the material box, open the discharge port, the base materials of components A and B flow out at the same time, and flow to the stirring blade of the hopper, and the stirring blade rotates at a high speed, so that the base materials of components A and B are fully mixed before scraping or coating. Spin coating; the problems of this kind of mixing equipment are: the pressure and discharge volume of the two base material boxes need to be strictly controlled at any time, construction personnel are required to continuously supply materials to the two base material boxes, and the mixing volume and output of the materials in the hopper need to be monitored from time to time. Consumption, only when the two base material boxes are accurately discharged and the material in the hopper is evenly mixed, can the base material be fully and proportionally mixed, and the mixed material in the hopper should not be hoarded or used for a long time. If the material in the hopper If the material is stored too much or is not used up for a long time, the mixture will react and solidify in the hopper, and the problem of the second situation mentioned above will appear. In addition, frequent manual feeding and constant monitoring of complex ingredients and materials cannot be realized. A continuous high-efficiency high-quality rapid scraping or spin coating of methyl methacrylate (MMA) high-strength polymer, and it is even more impossible to realize a continuous high-efficiency high-quality rapid spraying operation of methyl methacrylate high-strength polymer;

[0009] Due to the two-component (or multi-component) material spraying or brushing after the polymerization reaction with the construction subject, it can well protect the construction subject, greatly prolong the service life of the construction subject, and greatly improve the quality of the construction subject. The construction period is short, and it can be constructed in various harsh environments. The demand for construction with two-component (or multi-component) materials is growing stronger and stronger. However, because there is no construction equipment that can well complete the construction of two-component materials , forcing people to urgently need to find a kind of construction equipment, on the basis of fully considering the chemical characteristics of two-component (or multi-component) to solve the problem that two-component (or multi-component) materials have not been able to be high-quality, efficient and long-lasting for a long time. The technical problem of construction in time is to ensure that the two-component (or multi-component) fluid can not only ensure that the components can be fully mixed, but also ensure that no chemical reaction has occurred between the components. During this extremely short reaction period, Quickly complete spraying or brushing operations to meet the construction needs of modern roads, bridges, grounds, roads and other two-component (or multi-component) materials, and truly realize continuous high-quality and high-efficiency two-component (or multi-component) materials at one time Fast construction work, solving long-standing problems with existing spraying installations

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