Gluing and conveying device for pre-coating modified steel fiber or / and aggregate

Abstract

The invention discloses a gluing and conveying device for pre-coating modified steel fibers or / and aggregates. The gluing and conveying device is used for receiving the steel fibers conveyed by a dispersing and conveying device, spraying a glue layer and then conveying the steel fibers to a stirring device. Dispersed steel fibers are modified in a spray gluing mode, a glue layer is hardened to a set index by means of airflow blowing and then is directly conveyed to a concrete stirring procedure, the steel fibers are coated with a glue solution in a dispersed state, the glue solution is conveyed by means of airflow, and the steel fibers are uniformly dispersed. Qualified steel fibers modified by the epoxy glue can be produced and applied to production of the ultra-high performance concrete, the modified steel fibers are prevented from being bonded in the hardening process, and therefore application and popularization of the modified steel fiber ultra-high performance concrete are guaranteed.

Description

Technical Field

[0001] The invention relates to construction auxiliary equipment, in particular to a glue coating and conveying device for pre-coating modified steel fiber and / or aggregate. Background Art

[0002] Steel fiber concrete is a new type of building material. It is formed by adding steel fibers to ordinary concrete, which improves the tensile strength, toughness and durability of concrete. At the same time, it also has the advantages of light weight and easy construction. Therefore, steel fiber ultra-high performance concrete is widely used in bridges, highways, tunnels, subways, high-rise buildings, marine engineering, water conservancy and hydropower and other fields.

[0003] Steel fiber ultra-high performance concrete is formed by mixing steel fibers with concrete. Since the steel fibers used in ultra-high performance concrete are relatively fine, they are easily deformed into clumps and are difficult to disperse. Therefore, in the production process of ultra-high performance concrete, ensuring that all components are fully dispersed and evenly mixed is a process difficulty.

[0004] At the same time, steel fibers generally have smooth surfaces. After being mixed with concrete, they are not tightly bonded to concrete due to the contact angle at the microscopic level. Although they have many advantages over ordinary concrete, the advantages are still not fully utilized. In order to further improve the performance of ultra-high performance concrete, one of the inventors of this patent coated the surface of the steel fibers with a layer of epoxy glue and mixed it with concrete under appropriate hardness conditions, thereby increasing the contact area between the concrete and the steel fibers and increasing the adhesion between the two, thereby improving the performance of ultra-high performance concrete.

[0005] As mentioned above, for the production process of ultra-high performance concrete, steel fibers with smaller diameters are easy to agglomerate, which is already very difficult to disperse in the prior art. When adding epoxy adhesive coating and hardening process, steel fibers are more likely to adhere to each other, and dispersion and stirring are more difficult. Therefore, in order to avoid adhesion and inability to disperse during the production process, the method used more in the experiment is to stir the steel fibers in epoxy adhesive before hardening and add them to concrete for mixing. At this time, the adhesive layer is not hardened and is easily dissolved by the water in the concrete or rubbed off by the substances in the concrete. As a result, a large part of the steel fibers are not attached to the adhesive layer in the end, and thus ultimately fail to play an ideal role. Another situation is to completely cure the adhesive layer of the steel fiber. At this time, dispersion is relatively easy, but at this time, the surface of the epoxy adhesive layer is relatively smooth, and there is also a contact angle with the concrete, and there is the same problem of low adhesion only for steel fibers. Therefore, the ideal state is that the epoxy adhesive layer on the surface of the steel fiber is not completely cured but cured to a set hardness. During the mixing process with the concrete, the surface of the adhesive layer will undergo adaptive deformation, thereby eliminating the contact angle and increasing the adhesion. After curing, the advantages of steel fiber ultra-high performance concrete can be fully exerted. However, there is a strong bonding tendency between the adhesive layers that have not been fully cured, and they must be dispersed while waiting to cure to the set hardness, otherwise they will stick together and cannot be used for subsequent production; in the test, it can be handled by less efficient manual methods, but in the construction process, due to the large demand for concrete, it is impossible to achieve the purpose by manually applying the adhesive layer and dispersing the steel fibers, which affects the promotion and application of ultra-high performance concrete produced by modified steel fibers.

[0006] As for the aggregate of concrete, it also has better strength and the above advantages after spraying the glue layer. The same problem also exists in the spraying glue liquid. Although it does not have the clumping characteristics of steel fibers, similar problems still exist after coating.

[0007] Therefore, for the production of modified steel fibers and / or aggregates for use in concrete, a device is needed that can efficiently produce modified steel fibers and / or aggregate concrete suitable for addition to concrete, thereby avoiding bonding problems during the curing process of epoxy adhesive coating, thereby making the promotion and application of modified steel fibers and / or aggregate concrete a reality. Summary of the invention

[0008] In view of this, the purpose of the present invention is to provide a glue coating and conveying device for pre-coating modified steel fibers and / or aggregates, which can efficiently produce modified steel fibers and / or aggregate concrete suitable for adding to concrete, thereby avoiding the problem of bonding during the curing process of epoxy glue coating, thereby making the promotion and application of modified steel fibers and / or aggregate concrete a reality.

[0009] The glue coating and conveying device for pre-coating modified steel fibers and / or aggregates of the present invention comprises a conveying cylinder, a pneumatic conveying system and a glue spraying system, wherein the feeding port of the conveying cylinder is used to receive steel fibers and / or aggregates, and the discharging port of the conveying cylinder is used to output the steel fibers sprayed with the glue coating layer to the concrete mixing process; the pneumatic conveying system comprises a plurality of air flow nozzles, and the spraying direction of the air flow nozzles tends to be toward the discharging port of the conveying cylinder; the glue spraying system is provided with a plurality of glue atomizing nozzles, and the glue atomizing nozzles are used to atomize the glue and spray it toward the steel fibers and / or aggregates in the conveying cylinder.

[0010] Furthermore, the airflow nozzle comprises a front airflow nozzle and a barrel section airflow nozzle, and the airflow ejection direction of the front airflow nozzle is substantially consistent with the direction of the conveying barrel;

[0011] The air flow nozzle of the cylinder section is located at the bottom of the cylinder and the air flow ejection direction is inclined toward the outlet direction of the conveying cylinder and is tangent to the inner circle of the cylinder.

[0012] Furthermore, the glue atomizing nozzle includes a glue spray nozzle A located at the front section of the conveying cylinder and a glue spray nozzle B located at the rear section of the conveying cylinder.

[0013] Furthermore, each of the glue atomizing nozzles is correspondingly arranged at the front end of a glue pipe section, and a water spray pipe is connected to the glue pipe section, and the water spraying direction of the water spray pipe is inclined toward the spray outlet direction of the glue atomizing nozzle.

[0014] Furthermore, the glue coating conveying device also includes a drying system, which is used to input a hot air flow into the rear section of the conveying cylinder, and the position of inputting the hot air flow is located after the B glue liquid spray nozzle.

[0015] Furthermore, the cylinder section airflow nozzles are multiple and distributed from front to back at the bottom of the conveying cylinder, and the angle at which the airflow ejection directions of the multiple cylinder section airflow nozzles are inclined toward the outlet direction of the conveying cylinder gradually decreases from front to back.

[0016] Furthermore, there are multiple A glue spray nozzles and B glue spray nozzles, which are distributed in the upper and lower parts of the conveying cylinder, and the number of A glue spray nozzles and B glue spray nozzles distributed in the upper part is greater than that in the lower part.

[0017] Furthermore, part of the cylinder section air flow nozzles are cross-arranged with the A glue spray nozzle and the B glue spray nozzle.

[0018] Furthermore, the drying system comprises a plurality of hot air flow nozzles for ejecting hot air flow, wherein the hot air flow nozzles are located near the outlet of the conveying cylinder and the direction of ejecting the hot air flow is inclined toward the material incoming direction or perpendicular to the material flow direction.

[0019] Beneficial effects of the present invention: The glue coating and conveying device for pre-coating modified steel fibers and / or aggregates of the present invention uses a spray coating method to modify the dispersed steel fibers and / or aggregates, and uses airflow blowing to harden the glue layer to a set index and then directly convey it to a concrete mixing process. The glue liquid is applied to the steel fibers and / or aggregates in a dispersed state and conveyed by airflow, so that qualified steel fibers modified by epoxy glue can be produced and applied to the production of ultra-high performance concrete, avoiding bonding during the hardening process of the modified steel fibers and / or aggregates, thereby ensuring the promotion and application of modified steel fiber and / or aggregate concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention in concrete making equipment;

[0022] Figure 2 This is an axial cross-sectional view of a dispersion roller in a concrete making device;

[0023] Figure 3 It is a schematic diagram of the structure of the dispersion needle tip of the front dispersion roller;

[0024] Figure 4 It is a cross-sectional schematic diagram of the cylinder section airflow nozzle installed in the conveying cylinder;

[0025] Figure 5 It is an axial cross-sectional view of the airflow nozzle (including the front airflow nozzle and the barrel section airflow nozzle);

[0026] Figure 6 It is an axial cross-sectional view of the glue spray nozzle;

[0027] Figure 7 is an axial cross-sectional view of the hot gas flow nozzle;

[0028] Figure 8 Schematic diagram of the stirring assembly structure. DETAILED DESCRIPTION

[0029] like Figure 1-Figure 8 As shown: the glue coating and conveying device for pre-coated modified steel fiber and / or aggregate in this embodiment is mainly described by taking steel fiber as an example. The present invention is used for aggregate and also has similar technical effects.

[0030] The glue coating conveying device of the present invention comprises a conveying cylinder 201, a pneumatic conveying system and a glue liquid spraying system. The inlet of the conveying cylinder is used to receive Figure 1The steel fiber dispersing conveying device 1 shown in the figure has a discharge port of a conveying cylinder 201 used to convey the steel fiber sprayed with the glue layer to a stirring device 3 of a stirring process; the pneumatic conveying system includes a plurality of airflow nozzles, the spraying direction of the airflow nozzles tends to the discharge port of the conveying cylinder, and the airflow nozzles generally spray an airflow with a set speed. Since the spraying direction tends to the discharge port, a pneumatic thrust is formed on the steel fiber discharge, and at the same time, a pneumatic disturbance is formed on the steel fiber to keep it dispersed, which is beneficial to the subsequent glue coating process; the glue spraying system is provided with a plurality of glue atomizing nozzles, The glue liquid atomizing nozzle is used to atomize the glue liquid and spray it onto the steel fibers in the conveying cylinder; due to the effect of the airflow sprayed by the aforementioned airflow nozzle, the steel fibers are disturbed and flowed, and the atomized glue liquid sprayed by the glue liquid atomizing nozzle can be coated on the surface of the steel fibers; of course, the airflow volume of the airflow nozzle and the amount of glue sprayed by the glue liquid atomizing nozzle are adjusted according to the amount of steel fibers, so as to achieve the purpose of coating the glue layer on the surface of the steel fibers. At the same time, the airflow velocity of the airflow nozzle can accelerate the curing speed of the glue layer while driving the steel fibers to flow, thereby ensuring that the steel fibers at the discharge port of the conveying cylinder enter the stirring process.

[0031] When the present invention is used, it is generally necessary to combine a dispersing conveying device 1 for dispersing the steel fibers and a stirring device for uniformly mixing the steel fibers with the concrete, such as Figure 1-Figure 8 As shown, the stirring device 3 is used to receive the steel fibers sprayed with the glue layer and stir them with the concrete to form modified steel fiber concrete; the stirring device can be implemented by using existing concrete mixing equipment, such as a mixing truck, a mixing tank, etc., which will not be described in detail here;

[0032] The dispersing and conveying device 1 is used to receive the steel fibers and disperse and convey the steel fibers; the function of the dispersing and conveying device is to disperse the clumped steel fibers and try to form relatively uniform and independent steel fiber individuals. Generally, physical external forces are used for dispersion, such as vibration screening, pneumatic stirring, mechanical force separation, etc., all of which have the effect of dispersing the steel fibers;

[0033] In this embodiment, the air flow nozzle includes a front-end air flow nozzle 202 and a cylinder section air flow nozzle 203. The air flow ejection direction of the front-end air flow nozzle 202 is basically consistent with the direction of the conveying cylinder. Basically consistent means that the ejection direction of the air flow is basically along the direction from the cylinder inner cavity to the outlet, and there may be a small deviation angle, which will not be repeated here; the front-end air flow nozzle 202 is used to apply a primary flow direction driving force to the steel fibers entering the conveying cylinder, so as to ensure that the steel fibers have a driving force to flow along the conveying cylinder; as shown in the figure, the dispersion conveying device is located at the upper part of the glue coating conveying device, and directly uses gravity to successively convey the dispersed steel fibers to the conveying cylinder. The front-end air flow nozzle is located at one end of the conveying cylinder, located at the position where the steel fibers fall from the dispersion conveying device (generally using gravity) and directly blows the fallen steel fibers to pneumatically drive the steel fibers to flow; there may be multiple front-end air flow nozzles, and the ejection direction of the air flow is basically in accordance with the direction of the cylinder, and there may be a small distribution angle between each of them, which will not be repeated here;

[0034] The cylinder section airflow nozzle 203 is located at the bottom of the conveying cylinder 201 and the airflow ejection direction is inclined toward the outlet direction of the conveying cylinder 201 and is tangent to the inner circle of the conveying cylinder; Figure 4 As shown, the airflow is ejected tangentially to the inner circle of the conveying cylinder 201, which can prevent the steel fibers from sinking to the bottom and further disturb the steel fibers in the cylinder. At the same time, the ejection direction is inclined toward the outlet direction of the conveying cylinder, so that the steel fibers are driven to move forward and disturbed by the spiral without agglomeration and remain dispersed, ensuring that the subsequent glue spraying process proceeds normally.

[0035] like Figure 5 As shown, the airflow channel of the airflow nozzle (including the front airflow nozzle 202 and the cylinder section airflow nozzle 203) is a Venturi structure 2021, 2031, which is conducive to increasing the flow rate and also has a larger ejection cross-section. Under the joint action of multiple nozzles, it is conducive to covering the path through which the steel fibers pass, thereby avoiding the problem of steel fiber agglomeration and passing through the conveying cylinder in an orderly manner;

[0036] In the present invention, the injection power of the airflow nozzle (including the barrel section airflow nozzle and the front end airflow nozzle) can be achieved by using a compressor or a high-pressure container in the prior art, and each airflow nozzle is provided with a regulating valve that can adjust the flow rate and pressure, so that the injection parameters of each nozzle can be adjusted in a targeted manner to achieve targeted control during disturbance and transportation.

[0037] In this embodiment, the glue atomizing nozzle includes an A glue spray nozzle 204 located at the front section of the conveying cylinder and a B glue spray nozzle 205 located at the rear section of the conveying cylinder 201; as shown in the figure, this structure is suitable for glue materials with a base glue plus a curing agent, and can effectively control the curing time and curing timing; the A glue spray nozzle is located at the front section of the conveying cylinder and is generally used for spraying the base glue, and the B glue spray nozzle 205 is located at the rear section of the conveying cylinder and is used to spray the curing agent for curing the base glue; according to the degree of atomization and the curing properties, the A glue spray The nozzle 204 and the B glue spray nozzle 205 should be arranged adjacent to each other, or, although they are located at the front section and the rear section of the cylinder respectively, the description of the front section and the rear section of the cylinder does not have a strict boundary in this patent, and the two may be crossed, which is only used to describe the relative front and rear of the group of A glue spray nozzles 204 and the group of B glue spray nozzles 205, that is, when there are multiple A glue spray nozzles and B glue spray nozzles, the two may be arranged crosswise to ensure that the base glue and the curing agent can be mixed in time and fully;

[0038] The glue coating conveying device also includes a drying system, which is used to input a hot air flow into the rear section of the conveying cylinder, and the position of inputting the hot air flow is located after the B glue spray nozzle 205; the drying system uses a hot air flow, which can be conveniently heated by the heating device at the construction site and the exhaust system of the engine, and can adapt to the glue environment of the spray; the position of the hot air flow can ensure the curing control of the steel fiber coated with the base glue and the curing agent; the outflow volume, flow rate and temperature of the hot air flow are adjusted according to the number of steel fibers and the spray volume of the glue and the curing agent, which will not be repeated here; of course, in addition to the conveying and disturbing effects, the air flow of the air flow nozzle can also play a certain drying role. Combined with the drying system, the degree of drying can be reasonably determined to achieve the hardness required for entering the concrete mixing.

[0039] In this embodiment, each of the glue atomizing nozzles (including glue spray nozzle A and glue spray nozzle B) is correspondingly arranged at the front end of a glue pipe section, and a water spraying pipe 2042, 2052 is connected to the glue pipe section, and the water spraying direction of the water spraying pipe is inclined toward the spraying direction of the glue atomizing nozzle; the water spraying pipe sprays dilution water into the glue pipe section to disperse the colloid to form a sprayable glue and spray it; of course, the amount of water sprayed and the flow rate, etc. need to be adjusted according to the amount of colloid, which will not be repeated here;

[0040] like Figure 6 As shown, the spray channels of the glue atomizing nozzles (including glue spray nozzle A and glue spray nozzle B) are both venturi structures 2041, 2051, and the outlets are divided into small holes 2043, 2053 that allow the glue to be fully atomized, which will not be described in detail here;

[0041] In the present invention, the injection power of the glue and water in the glue atomizing nozzle can be achieved by using a machine pump or a high-pressure container in the prior art, and each glue atomizing nozzle is provided with a regulating valve that can adjust the flow rate and pressure, so that the injection parameters of each nozzle can be adjusted in a targeted manner, thereby achieving targeted control during the glue spraying process.

[0042] As shown in the figure, the dispersing conveying device 1 is located above the conveying cylinder 201 and includes a dispersing housing 104 and dispersing rollers 102 and 103. The dispersing housing 104 is provided with a dispersing housing inlet for receiving steel fibers and a dispersing housing outlet connected to the feeding port of the conveying cylinder 201; Figure 1 As shown, the outlet of the dispersion part housing 104 is located at the upper part of the feeding port of the conveying cylinder, forming a connection; the feeding port of the conveying cylinder 201 is formed with a constriction relative to the conveying cylinder itself, which is conducive to forming a larger disturbance space and a smaller feeding port is more conducive to the airflow nozzle to exert airflow disturbance force on the incoming material in a targeted manner;

[0043] The description of the dispersion roller of this embodiment takes the dispersion roller 102 as an example. The dispersion rollers 102 and 103 are completely identical in structure principle. The dispersion roller 102 includes a central roller shaft 1021 and dispersion needles 1022. The dispersion needles 1022 are distributed on the outer surface of the roller shaft and extend radially. The central roller shaft 1021 can be driven to rotate and use the dispersion needles to evacuate and transport the steel fibers entering the dispersion part shell. In this structure, the central roller shaft is a sleeve structure, and the two ends are respectively matched with the support shaft 1023. The support shaft 1023 is rotatably matched with the bearing seat formed by the dispersion shell through the bearing. Of course, it is also A replaceable driving structure such as a driving motor should be provided, which belongs to the driving and rotating support structure commonly used in the mechanical field of the prior art and will not be described in detail here. The clumped steel fibers are loosened by the dispersion needles arranged on the dispersion shaft. The distribution density and arrangement of the dispersion needles, combined with the rotation speed of the central roller, can make the clumped steel fibers loose and also enable the steel fibers to be transported backward without being missed too much. The cross-sectional size of the dispersion needle should not be too thick and should not be deformed when loosening the steel fibers. In order to fully loosen the clumped steel fibers, the dispersion needle should have a pointed portion, which will not be described in detail here.

[0044] In this embodiment, there are multiple cylinder section airflow nozzles 203 distributed from front to back at the bottom of the conveying cylinder, and the angle of the airflow ejection direction of the multiple cylinder section airflow nozzles toward the outlet direction of the conveying cylinder gradually decreases from front to back; the arrangement of multiple cylinder section airflow nozzles can keep the steel fibers in the entire cylinder body disturbed during the flow process. Of course, the flow rate and pressure of each front end airflow nozzle and each cylinder section airflow nozzle can be adjusted according to the flow rate of the steel fibers in the cylinder, the degree of disturbance, the thickness of the glue covering the steel fibers, and the curing effect, so as to ensure the final gluing effect.

[0045] In this embodiment, the A glue spray nozzle 204 and the B glue spray nozzle 205 are both multiple and distributed at the upper and lower parts of the conveying cylinder, and the number of the A glue spray nozzle and the B glue spray nozzle distributed at the upper part is greater than that at the lower part; it is ensured that the steel fibers are sprayed in all directions. Since the upper part faces the disturbed steel fibers, it is conducive to full contact spraying, so the number of the upper part is greater than that of the lower part; in this structure, the flow rate and pressure of the glue spray can be adjusted. Generally, the glue nozzle at the lower part is larger than the glue nozzle at the upper part, and the steel fibers are disturbed while spraying.

[0046] Part of the cylinder section air flow nozzle 203 is cross-set with the A glue spray nozzle 204 and the B glue spray nozzle 205 to ensure that the glue and curing agent outside the steel fiber form a cross spray and are fully mixed to ensure the final curing effect.

[0047] The drying system includes a plurality of hot air flow nozzles 206 for ejecting hot air flow, and the hot air flow nozzles 206 are located near the outlet of the conveying cylinder and the direction of ejecting the hot air flow is inclined to the incoming direction of the material or perpendicular to the material flow direction; the steel fiber sprayed with the glue is dried by the hot air flow, and combined with the air flow drying of the air flow nozzle, qualified modified steel fiber is formed at the outlet of the cylinder; the hot air flow can be formed by other equipment on the construction site and directly connected to the hot air flow nozzle, such as equipment for heating asphalt or heating the road surface, which can be realized by transmission using general equipment such as compressors, which will not be repeated here; the air flow outflow direction of the hot air flow nozzle 206 is generally inclined or perpendicular to the incoming direction to ensure that the hot air flow can be fully utilized, which will not be repeated here; the temperature and flow rate of the hot air flow can be adjusted to meet the needs of drying; such as Figure 7 As shown, the outlet portion 2061 of the hot air flow nozzle is a flared structure to ensure the dispersion of the hot air flow and thus improve the heating efficiency. The outlet of the hot air flow nozzle is divided into a plurality of hot air flow holes 2062 to further ensure the dispersion of the hot air flow and improve the flow rate.

[0048] When the present invention is used, it is located before the stirring device. The stirring device 3 includes a stirring shell 302 and a stirring assembly 301. The stirring assembly 301 includes a stirring shaft 3012 and a spiral blade 3011 arranged on the stirring shaft 3012. The stirring shaft 3012 can be driven (the driving power can be achieved by the power machinery of the prior art, which will not be repeated here) to rotate and drive the spiral blade 3011 to stir the material and drive the material to flow along the axial direction; Figure 8As shown, spiral blades are used for stirring, so that the material can flow along the axial direction of the stirring shaft, avoiding the modified steel fiber staying in one place and causing re-agglomeration, so as to ensure the uniform distribution of the modified steel fiber in the product; the stirring components can be two or more groups, forming a circulating stirring in the stirring shell, that is, during stirring, the concrete is in a circulating flow state, thereby further improving efficiency and quality; Figure 8 As shown, the stirring shell is semicircular and mostly enclosed in the stirring assembly 301 from bottom to top, and is supported by a bracket 303. The bracket 303 also supports the conveying cylinder, and the dispersion shell is only attached to the conveying cylinder. The whole is a complete integrated structure. The corresponding bracket structure can be set by existing mechanical means. The whole is complete and compact, can be installed on a traveling vehicle, and is convenient and flexible to use.

[0049] In the dispersing conveying device 1, the dispersing rollers include a front dispersing roller 102 and a rear dispersing roller 103 arranged according to the flow direction of the steel fibers, and a front dispersing roller cavity and a rear dispersing roller cavity interconnected with each other are formed inside the shell of the dispersing part, and the front dispersing roller cavity and the rear dispersing roller cavity respectively form conformal containment for the front dispersing roller and the rear dispersing roller in the directions other than the positions of the inlet and outlet materials, such as Figure 1 As shown, the front dispersion roller chamber feed, the front dispersion roller chamber discharge, the rear dispersion roller chamber feed, and the rear dispersion roller chamber discharge are all arranged according to the steel fiber process, and the front dispersion roller chamber discharge is connected with the rear dispersion roller chamber feed; the rearward inclusion position of the front dispersion roller chamber bottom to the front dispersion roller does not exceed the maximum horizontal diameter of the front dispersion roller, and when the steel fiber is rotated, conveyed, and dispersed, the steel fiber is prevented from falling back to the front dispersion roller chamber, and because the connection between the front dispersion roller chamber and the bottom of the rear dispersion roller chamber protrudes upward, the material will fall into the rear dispersion roller chamber, ensuring smooth material transportation while dispersing;

[0050] Since steel fibers have very poor dispersibility, the main function of the front dispersing roller is to first convey the material to the dispersing shell and perform preliminary dispersion at the same time, while the rear dispersing roller further disperses and conveys downward. The two-stage dispersing and conveying structure allows the clumped steel fibers to be fully dispersed; Figure 1 As shown, the rotation direction of the front dispersing roller is counterclockwise, and the feeding direction is on the upper right side. The rotation direction of the rear dispersing roller is also counterclockwise, which lengthens the movement process of the steel fiber and ensures a higher dispersing efficiency.

[0051] In the present invention, the driving power of the dispersion roller can adopt conventional driving power, such as the rotation driving power of the vehicle at the construction site, or external electric drive, engine driving power, etc., which belongs to conventional mechanical power drive and will not be described in detail here;

[0052] In this embodiment, the steel fiber adding device further comprises a hopper 101, wherein the hopper 101 has a hopper outlet 1011 connected to the inlet of the dispersion part shell, and the feeding area of ​​the inlet of the dispersion part shell covers the front dispersion roller 102 in the axial direction of the front dispersion roller, and is located in the middle and upper part of the front dispersion roller, and the steel fiber is transported to the front dispersion roller approximately in the radial direction; approximately in the meridian direction means that the feeding direction enters the front dispersion roller in the radial direction and a smaller angle is allowed, which will not be repeated here;

[0053] The dispersion needles of the front dispersion roller 102 and the rear dispersion roller 103 are both pointed, and the tip of the dispersion needle 1022 of the front dispersion roller 102 is bent along the rotation direction to set an angle. As shown in the figure, since the rotation direction of the front dispersion roller in this embodiment is counterclockwise, the bent needle tip is conducive to picking up the steel fiber and the agglomerated steel fiber to ensure the conveying effect. Therefore, the bending angle is based on the ability to pick up the steel fiber; and the rotation direction of the front dispersion roller makes the dispersion needle of the front dispersion roller move upward relative to the inlet of the dispersion part shell, as shown in FIG. Figure 1 As shown, the bent tip moves upward at the entrance position, which is conducive to picking up the steel fiber. At the same time, it is also conducive to the release and fall of the steel fiber in the opposite direction, ensuring dispersion and facilitating smooth transportation.

[0054] As for the conveying cylinder (glue conveying device part) of this equipment, the inventor conducted a simple experiment: the air flow conveying, disturbance and glue spraying in the cylinder are similar to those in this patent, and the heating is achieved by installing a resistance wire near the cylinder outlet. After many tests, the modified steel fiber with suitable surface hardness was finally obtained; but after research and analysis, it was found that the heating of the resistance wire was not uniform enough. After theoretical analysis, the use of hot air flow with a set pressure for heating, combined with the aforementioned wind drying, has a better technical effect.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A glue coating and conveying device for pre-coating modified steel fiber and / or aggregate, characterized in that: It comprises a conveying cylinder, a pneumatic conveying system and a glue spraying system, wherein the feeding port of the conveying cylinder is used to receive steel fibers and / or aggregates, and the discharging port of the conveying cylinder is used to output the steel fibers and / or aggregates sprayed with the glue layer to the concrete mixing process; the pneumatic conveying system comprises a plurality of air flow nozzles, and the spraying direction of the air flow nozzles tends to the discharging port of the conveying cylinder; the glue spraying system is provided with a plurality of glue atomizing nozzles, and the glue atomizing nozzles are used to atomize the glue and spray it onto the steel fibers and / or aggregates in the conveying cylinder.

2. The glue coating and conveying device for pre-coated modified steel fibers and / or aggregates according to claim 1 is characterized in that: The airflow nozzle comprises a front airflow nozzle and a barrel section airflow nozzle, and the airflow ejection direction of the front airflow nozzle is substantially consistent with the direction of the conveying barrel; The air flow nozzle of the cylinder section is located at the bottom of the cylinder and the air flow ejection direction is inclined toward the outlet direction of the conveying cylinder and is tangent to the inner circle of the cylinder.

3. The glue coating and conveying device for pre-coated modified steel fibers and / or aggregates according to claim 2 is characterized in that: The glue liquid atomizing nozzle comprises a glue liquid spray nozzle A located at the front section of the conveying cylinder and a glue liquid spray nozzle B located at the rear section of the conveying cylinder.

4. The glue coating and conveying device for pre-coated modified steel fiber and / or aggregate according to claim 1 is characterized in that: Each of the glue atomizing nozzles is correspondingly arranged at the front end of a glue pipe section, and a water spray pipe is connected to the glue pipe section. The water spraying direction of the water spray pipe is inclined toward the spray outlet direction of the glue atomizing nozzle.

5. The glue coating and conveying device for pre-coated modified steel fiber and / or aggregate according to claim 3 is characterized in that: The glue coating conveying device also includes a drying system, which is used to input a hot air flow into the rear section of the conveying cylinder, and the position of inputting the hot air flow is located after the B glue liquid spray nozzle.

6. The glue coating and conveying device for pre-coating modified steel fiber and / or aggregate according to claim 3 is characterized in that: There are multiple cylinder section airflow nozzles distributed from front to back at the bottom of the conveying cylinder, and the angles of the airflow ejection directions of the multiple cylinder section airflow nozzles inclined toward the outlet direction of the conveying cylinder gradually decrease from front to back.

7. The glue coating and conveying device for pre-coated modified steel fibers and / or aggregates according to claim 6 is characterized in that: There are multiple A glue spray nozzles and B glue spray nozzles, which are distributed in the upper and lower parts of the conveying cylinder, and the number of A glue spray nozzles and B glue spray nozzles distributed in the upper part is greater than that in the lower part.

8. The glue coating and conveying device for pre-coated modified steel fibers and / or aggregates according to claim 7 is characterized in that: Part of the cylinder section air flow nozzles are cross-arranged with the A glue spray nozzle and the B glue spray nozzle.

9. The glue coating and conveying device for pre-coated modified steel fibers and / or aggregates according to claim 4, characterized in that: The drying system comprises a plurality of hot air flow nozzles for ejecting hot air flow, wherein the hot air flow nozzles are located near the outlet of the conveying cylinder and the direction of ejecting the hot air flow is inclined toward the material incoming direction or perpendicular to the material flow direction.

Images