Spraying processing device for frosted coated steel bar

Abstract

The utility model provides a spraying processing device for frosted coating reinforcing steel bar, including heating equipment, electrostatic spraying equipment and spraying cooling equipment, a roller way includes a rack and a roller wheel, the inlet end of the heating equipment is provided with an aligning assembly, the aligning assembly includes an aligning member and an aligning driving member, the aligning member is opposite to the inlet end of the heating equipment, and the aligning driving member is connected with the aligning member. The alignment driving part is connected with the alignment part and is used for driving the alignment part to movably block the inlet end of the heating equipment or avoid the inlet end; a water tank is arranged on a rack of a roller way at an output port of the electrostatic spraying equipment, the water tank is filled with water, a water absorption layer is wound on a roller on the water tank of the rack, and the water absorption layer can be partially immersed in the water of the water tank. Steel bars can be synchronously input into the heating holes of the heating equipment, current fluctuation of a heating coil is avoided, the steel bar machining temperature consistency is guaranteed, and therefore the product quality consistency is guaranteed. And the water absorption layer can absorb more steam layers formed by water seals for a longer time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating steel bar production equipment, especially a spraying processing device for frosted coating steel bars. BACKGROUND

[0002] Epoxy coating steel bars are produced by spraying epoxy resin powder on the surface of ordinary ribbed steel bars and ordinary plain round steel bars under factory production conditions using electrostatic spraying. Epoxy coating steel bars have good corrosion resistance, but the bonding strength with concrete is significantly reduced, so they are suitable for use in the reinforced concrete structures of industrial and civil buildings, general structures, roads, bridges, ports, wharfs, etc. in humid environments or in corrosive media.

[0003] In the prior art, the epoxy coating steel bars are cooled by spraying after electrostatic spraying, and the steel bars after spraying are sent to the spraying section for cooling by a roller table. Since the just-sprayed steel bars have a high temperature, the epoxy resin has not completely solidified and adsorbed on the steel bars, and if the cooling is too fast, the epoxy resin cannot be fully adsorbed on the surface of the steel bars, and it is easy to peel off in subsequent use. Therefore, the traditional production line needs to transport the steel bars on the roller table for a distance for natural cooling, but the natural cooling speed is relatively slow, and the steel bars sprayed with epoxy resin directly contact the roller at this time, and a small part of the epoxy coating on the surface of the steel bars will peel off and stick to the roller, so that the steel bars need to be reworked to fill the peeled part to meet the requirements in subsequent use, and the high temperature of the steel bars will be transferred to the roller, affecting the service life of the roller. Although the existing equipment immerses the roller in a water tank and is provided with a spray head to spray water on the groove for cooling (the water does not directly contact the steel bars), the water quickly falls back to the water tank due to gravity, only a small amount of water droplets are left in the groove, the water droplets evaporate quickly due to the high initial temperature of the steel bars, and the roller conveying speed cannot be too fast, so the steel bars still contact the roller at this position for a short time, and therefore the problem of epoxy coating sticking to the groove of the roller still exists.

[0004] In addition, the existing production line does not provide a blocking device at the connection between the conveying roller and the intermediate frequency heating equipment. Although the steel bars are aligned when being fed, there is a slight difference in friction between the steel bars and the roller during conveying due to the texture on the surface of the steel bars, and the conveying speed also has a slight difference. As the conveying distance increases, the difference in the moving distance of the steel bars becomes more and more obvious, a part of the steel bars enters the heating hole of the heating equipment for heating first, and the other part of the steel bars enters the heating hole later, so that the heating coil of the heating hole cannot be started and stopped synchronously, the current and voltage of the coil fluctuate, the heating rate of each heating hole fluctuates, the consistency of the product processing conditions is destroyed, and the consistency of the product quality is affected. As shown in the patent document with the announcement number CN201543577U. UTILITY MODEL CONTENTS

[0005] The utility model discloses a spraying processing device for sanding coating steel bars.

[0006] The utility model discloses the following method is adopted to realize: a kind of spraying processing device for sanding coating steel bars, including heating equipment, electrostatic spraying equipment and spray cooling equipment, the outlet end of the electrostatic spraying equipment and the spray cooling equipment are connected between the roller way of conveying steel bar, the import end of the heating equipment is connected with roller way, and roller way includes rack and roller, the import end of the heating equipment is installed with alignment component, and the alignment component includes alignment piece and alignment drive part, the alignment piece is opposite with the import end of the heating equipment, the alignment drive part is connected with the alignment piece, for driving the alignment piece movablely blocks the import end of the heating equipment or avoids import end;The rack of the roller way between the output port of the electrostatic spraying equipment and the spray cooling equipment inlet end is equipped with water tank, the water tank is filled with water, and the roller above the water tank of the rack is wound with water absorption layer, and the water absorption layer can be partially immersed in the water of water tank.

[0007] Preferably, the alignment drive part includes a shaft and a telescopic rod, the shaft is rotatably installed on the roller connected to the import end of the heating equipment, the alignment piece is an alignment plate, the alignment plate is fixed to the outer surface of the shaft, and the side of the alignment plate facing the heating equipment in the alignment blocking state is provided with a connecting rod, the connecting rod is movably connected with the telescopic rod to drive the shaft to rotate and in turn drive the alignment plate to move to the blocking position and the avoiding position.

[0008] Preferably, the cylinder of the telescopic rod is hinged to the ground, and the elongated end of the telescopic rod is hinged to the connecting rod.

[0009] Preferably, the roller connected to the import end of the heating equipment is provided with a bearing seat on both sides in the product advancing direction, and the two ends of the shaft are connected with the corresponding bearing seats through a bearing.

[0010] Preferably, the axis of the shaft is at the same height as the axis of the roller.

[0011] Preferably, the diameter of the shaft is less than or equal to the minimum diameter of the groove of the roller.

[0012] Preferably, the water surface in the water tank is higher than the bottom end of the circumferential surface on which the roller is installed.

[0013] Preferably, the electrostatic spraying equipment is provided with a spraying cavity, and a row of spray heads is arranged in the upper part and the bottom part of the spraying cavity, respectively, and the product passes between the spray heads of the upper part and the bottom part.

[0014] Preferably, the spray heads of the upper part and the bottom part are symmetrically arranged.

[0015] Preferably, the water-absorbing layer is cloth or sponge.

[0016] The utility model discloses a spraying processing device for sanding coating steel bars, compared with prior art, the utility model discloses at least have following technical effect: 1. the alignment component that heating equipment import end is provided, through the alignment drive part drive alignment piece activity block or avoid heating equipment import end, can make all steel bars all bear alignment component again and then release, ensure that heating equipment each heating hole can synchronous input steel bar, avoid heating coil current fluctuation, guarantee steel bar processing temperature consistent, thereby guarantee the consistency of product quality, between electrostatic spraying equipment and spray cooling equipment the water tank that setting of roll way frame supplies its upper roller winding water-absorbing layer absorbs moisture, can make water stay on the roller longer, have more moisture and steel bar contact, avoid moisture evaporate completely too fast, make the steam layer formed a little more durable, can avoid the steel bar that direct spray on causes too much water too fast cooling, can reach the protection of epoxy coating that avoids epoxy coating to be adhered to the roll wheel, also protects the rubber roller. 2. the structure of pivot and telescopic link is used to the alignment drive part, and the structure is simple, and the driving is stable, and the switching of alignment plate between the blocking position and the avoiding position is convenient. 3. the axis of pivot and the axis of roller are at the same height, and the diameter of pivot is less than or equal to the minimum diameter of roller groove, and when being in the avoiding state, avoid the moving path of steel bar being blocked by pivot. 4. the water surface in the water tank is higher than the bottom end of roller circumference, and its beneficial effect is that the water-absorbing layer can be fully immersed in water, and the water-absorbing layer can absorb water and cool the roller. 5. a row of spray heads are arranged in the upper part and the bottom part of the spraying cavity of electrostatic spraying equipment respectively, and the spray heads are symmetrically arranged, which can spray the upper and lower sides of the steel bar simultaneously, so that the steel bar is evenly covered with epoxy resin powder during the spraying process, the uniformity and quality of the coating are improved, and the rework and defective rate caused by uneven spraying are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a state schematic view of the spraying processing device for sanding coating steel bars of the utility model in conveying steel bars.

[0018] Figure 2 It is the schematic of the alignment component of the utility model in the blocking state.

[0019] Figure 3 It is another visual angle schematic of the alignment component of the utility model in the blocking state.

[0020] Figure 4 It is the schematic of the alignment component of the utility model in the avoiding state.

[0021] Figure 5 It is the cross section structure schematic of the utility model at the roller.

[0022] Figure 6 is a sectional structure schematic view of the utility model at electrostatic spraying equipment.

[0023] Explanation of reference numerals: 1, heating equipment; 2, electrostatic spraying equipment; 21, spraying cavity; 22, spray head; 3, spray cooling equipment; 4, roller table; 41, rack; 42, roller; 5, alignment assembly; 51, alignment piece; 52, alignment driving piece; 521, pivot; 522, telescopic rod; 6, water tank; 7, water absorption layer. DETAILED DESCRIPTION

[0024] The utility model will be further explained in connection with the drawings and specific embodiments.

[0025] Please refer to Figures 1 to 6A spraying processing device for sanding coating steel bars, comprising a heating device 1, an electrostatic spraying device 2 and a spraying cooling device 3, a roller 4 for conveying steel bars is connected between the electrostatic spraying device 2 and the spraying cooling device 3, and a roller is also connected at the inlet end of the heating device 1; the roller 4 comprises a frame 41 and a roller 42, an alignment assembly 5 is installed at the inlet end of the heating device 1, the alignment assembly 5 comprises an alignment piece 51 and an alignment driving piece 52, the alignment piece 51 is opposite to the inlet end of the heating device 1, and the alignment driving piece 52 is connected with the alignment piece 51 and used for driving the alignment piece 51 to move to block or avoid the inlet end of the heating device 1; a water tank 6 is arranged on the frame 41 of the roller 4 between the outlet port of the electrostatic spraying device 2 and the inlet end of the spraying cooling device 3, the water tank 6 is filled with water, a water absorption layer 7 is wound on the roller 42 above the water tank 6, and the water absorption layer 7 can be partially immersed in the water in the water tank 6. The alignment assembly 5 arranged at the inlet end of the heating device 1 can make all the steel bars resist against the alignment assembly 5 and then be released, so that the heating holes of the heating device 1 can input the steel bars synchronously, the current fluctuation of the heating coil is avoided, the processing temperature of the steel bars is uniform, and the consistency of product quality is ensured; the water tank 6 arranged on the frame 41 of the roller 4 between the electrostatic spraying device 2 and the spraying cooling device 3 is used for absorbing water by the water absorption layer 7 wound on the roller 42, so that the water can stay on the roller 42 for a longer time, more water can contact the steel bars, the water evaporation is avoided to be too fast, the steam layer formed is more persistent, the direct spraying on the steel bars is avoided to cause the steel bars to contact too much water and be cooled too fast, the epoxy coating on the roller 42 is protected, and the rubber roller is also protected. Preferably, the alignment piece 51 is made of a plate-shaped material, the heating device 1, the electrostatic spraying device 2 and the spraying cooling device 3 are all existing devices, and no specific protection requirement is made. The water absorbed by the water absorption layer is not too much, so the water absorption of the heat of the steel bars is not too much, and the full contact and adhesion of the epoxy coating and the steel bars are not affected.

[0026] Please refer to Figures 1 to 4Preferably, the alignment driving member 52 comprises a rotating shaft 521 and an extension rod 522, the rotating shaft 521 is rotatably installed on the roller 4 which is butted to the inlet end of the heating device 1, the alignment member 51 is an alignment plate which is fixed to the outer circumferential surface of the rotating shaft 521, and a connecting rod is arranged on the side of the alignment plate which faces the heating device 1 when the alignment plate is in the alignment blocking state, the connecting rod is movably connected with the extension rod 522 to drive the rotating shaft 521 to rotate and further drive the alignment plate to move to the blocking position and the avoiding position. The alignment driving member 52 adopts the structure of the rotating shaft 521 and the extension rod 522, which is simple in structure, stable in driving and convenient for switching the alignment plate between the blocking position and the avoiding position. The first extension rod can be an electric extension rod 522, a pneumatic cylinder or a hydraulic cylinder, and is not limited thereto. A motor driven mode can also be adopted. The fixing mode of the rotating shaft 521 and the alignment plate can adopt various modes such as welding and bolt connection to enhance the firmness of the connection.

[0027] Please refer to Figures 1 to 4 Preferably, the cylinder body of the extension rod 522 is hinged to the ground, and the elongated end of the extension rod 522 is hinged to the connecting rod. Different types of hinges such as joint bearings and hinges can be arranged at the hinge positions to improve the flexibility and reliability of the hinges. The positions and angles of the hinge points can also be adjusted according to the actual installation space and stress conditions.

[0028] Please refer to Figures 1 to 4 Preferably, bearing seats are arranged on both sides of the roller 4 which is butted to the inlet end of the heating device 1 in the product running direction, and the two ends of the rotating shaft 521 are connected with the corresponding bearing seats through bearings. This can reduce the friction resistance when the rotating shaft 521 rotates, and improve the rotating flexibility and service life of the rotating shaft 521.

[0029] Please refer to Figures 1 to 4 Preferably, the axis of the rotating shaft 521 is at the same height as the axis of the roller 42. The diameter of the rotating shaft 521 is less than or equal to the minimum diameter of the groove of the roller 42. The axis of the rotating shaft 521 is at the same height as the axis of the roller 42, and the diameter of the rotating shaft 521 is less than or equal to the minimum diameter of the groove of the roller 42, which can avoid the rotating shaft 521 blocking the moving path of the reinforcing steel bars when the rotating shaft 521 is in the avoiding position.

[0030] Please refer to Figures 1 to 3 , Figure 5 Preferably, the water surface in the water tank 6 is higher than the lowest end of the circumferential surface of the roller 42 which is installed thereon. The water surface in the water tank 6 is higher than the lowest end of the circumferential surface of the roller 42, which has the beneficial effect of ensuring that the water absorption layer 7 is fully immersed in water, ensuring that the water absorption layer 7 can absorb water and cool the roller 42.

[0031] Please refer to Figure 6Preferably, the electrostatic spraying device 2 is provided with a spraying cavity 21, and an upper portion and a bottom portion of the spraying cavity 21 are respectively provided with a row of spraying heads 22, and the product passes between the spraying heads 22 of the upper portion and the bottom portion. The electrostatic spraying device 2 is provided with a row of spraying heads 22 in the upper portion and the bottom portion of the spraying cavity 21, and the spraying heads 22 are symmetrically arranged, so that the upper side and the lower side of the reinforcing steel bar can be sprayed at the same time, the reinforcing steel bar is uniformly covered with epoxy resin powder during the spraying process, the uniformity and the quality of the coating are improved, and the rework and the defective rate caused by uneven spraying are reduced. The electrostatic spraying device 2 of the utility model has the two rows of spraying heads 22 which are symmetrically arranged on the upper portion and the bottom portion, and the remaining structure and the principle of realizing spraying are the same as those of the existing electrostatic spraying device 2, and detailed description is not made.

[0032] Please refer to Figure 6 Preferably, the spraying heads 22 of the upper portion and the bottom portion are symmetrically arranged. The uniformity of spraying is ensured.

[0033] Preferably, the water absorption layer 7 is cloth or sponge. The performance requirements of the device on the water absorption layer 7 can be effectively met. In actual application, the cloth can be cloth of different materials and weaving methods, such as cotton cloth, non-woven fabric and the like; and the sponge can be sponge with high density and few pores, so as to avoid absorbing too much water, and to adapt to different use scenes and water absorption requirements.

[0034] The utility model has the following working principle:

[0035] Firstly, the reinforcing steel bar is conveyed to the roller bed 4 through the feeding device, the roller 42 of the roller bed 4 rotates to drive the reinforcing steel bar to be conveyed forward. When the reinforcing steel bar is conveyed to the inlet end of the heating device 1, the alignment driving member 52 drives the alignment member 51 to block the inlet end of the heating device 1, so that the front end of the reinforcing steel bar abuts against the alignment member 51, at this time, the subsequent reinforcing steel bar continues to be conveyed, until all the reinforcing steel bars abut against the alignment member 51. Then, the alignment driving member 52 drives the rotating shaft 521 to rotate reversely to make the alignment member 51 swing downward to avoid the inlet end of the heating device 1, and the reinforcing steel bar is synchronously conveyed into the heating device 1 to be heated.

[0036] The heated steel bars are conveyed to the electrostatic spraying device 2 through the roller 4, enter the spraying cavity 21 of the electrostatic spraying device 2 (the electrostatic spraying device 2 has two electrostatic spraying machines arranged in sequence, and the steel bars are sprayed twice in sequence, first with smooth powder, and then with matte powder), and the upper and bottom symmetrical nozzles 22 in the spraying cavity 21 spray the epoxy resin powder to the steel bars, so that the surface of the steel bars is uniformly covered with a coating. After spraying is completed, the steel bars continue to be conveyed to the area provided with the water tank 6 through the roller 4. Since the water surface in the water tank 6 is higher than the bottom end of the peripheral surface of the roller 42, the water absorption layer 7 wound on the roller 42 is partially immersed in water, and the water absorption layer 7 absorbs water. When the steel bars pass through the area, the water on the water absorption layer 7 contacts the steel bars, and a water vapor layer is generated, which effectively prevents the water absorption material from contacting the coating on the surface of the steel bars, avoids rapid cooling of the steel bars, and effectively prevents the epoxy coating from adhering to the roller 42. Finally, the steel bars continue to be conveyed to the spraying cooling device 3 through the roller 4 for further cooling, and the spraying and processing of the steel bars with matte coating are completed.

[0037] It should be noted that, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may change.

[0038] Secondly: the utility model discloses the embodiment of the drawings only relates to the structure involved in the embodiment of the present disclosure, and other structures can refer to the usual design, and under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0039] Finally, the preferred embodiments of the utility model are described above, and the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the utility model belongs to the protection scope of the utility model.

[0040] It should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A spraying processing apparatus for frosted coated steel bars, comprising a heating device, an electrostatic spraying device, and a spray cooling device, wherein a roller conveyor for conveying steel bars is connected between the outlet end of the electrostatic spraying device and the spray cooling device, and a roller conveyor is connected to the inlet end of the heating device, the roller conveyor comprising a frame and rollers, characterized in that: An alignment assembly is installed at the inlet end of the heating equipment. The alignment assembly includes an alignment member and an alignment drive member. The alignment member is opposite to the inlet end of the heating equipment, and the alignment drive member is connected to the alignment member to drive the alignment member to move and block or avoid the inlet end of the heating equipment. A water tank is provided on the frame of the roller conveyor between the output port of the electrostatic spraying equipment and the inlet end of the spray cooling equipment. The water tank is filled with water, and a water-absorbing layer is wound on the roller located above the water tank on the frame. The water-absorbing layer can be partially immersed in the water in the water tank.

2. The spraying device for frosted coated steel bars according to claim 1, characterized in that: The alignment drive includes a rotating shaft and a telescopic rod. The rotating shaft is rotatably mounted on the roller conveyor connected to the inlet end of the heating equipment. The alignment component is an alignment plate, which is fixed to the outer circumferential surface of the rotating shaft. When the alignment plate is in the alignment blocking state, a connecting rod is provided on the side facing the heating equipment. The connecting rod is movably connected to the telescopic rod to drive the rotating shaft to rotate and thus move the alignment plate to the blocking position and the avoidance position.

3. The spraying device for frosted coated steel bars according to claim 2, characterized in that: The cylinder of the telescopic rod is hinged to the ground, and the extended end of the telescopic rod is hinged to the connecting rod.

4. The spraying device for frosted coated steel bars according to claim 2, characterized in that: The roller conveyor connected to the inlet end of the heating equipment is provided with bearing seats on both sides in the product travel direction, and the two ends of the rotating shaft are respectively connected to the corresponding bearing seats through a bearing.

5. A spraying device for frosted coated steel bars according to claim 2, characterized in that: The axis of the rotating shaft is at the same height as the axis of the roller.

6. The spraying device for frosted coated steel bars according to claim 5, characterized in that: The diameter of the rotating shaft is less than or equal to the minimum diameter of the groove of the roller.

7. The spraying device for frosted coated steel bars according to claim 1, characterized in that: The water level in the tank is higher than the bottom of the circumference on which the roller is mounted.

8. The spraying device for frosted coated steel bars according to claim 1, characterized in that: The electrostatic spraying equipment is provided with a spraying chamber, and a row of spray nozzles is provided at the top and bottom of the spraying chamber, and the product passes through the spray nozzles at the top and bottom.

9. A spraying device for frosted coated steel bars according to claim 8, characterized in that: The nozzles at the top and bottom are arranged symmetrically.

10. A spraying device for frosted coated steel bars according to claim 1, characterized in that: The absorbent layer is made of fabric or sponge.

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