Galvanizing additive raw material preheater

Abstract

The utility model relates to the field of galvanization additive heating, and discloses a galvanization additive raw material preheater which comprises a heating tank, a uniform mixing assembly is arranged at the bottom of the heating tank, a feeding pipe is fixedly connected to the top of the heating tank, and a heat conduction plate is fixedly connected to the inner wall of the heating tank. An electric heating rod is fixedly connected to the inner wall of the heating tank, a mounting ring is fixedly connected to the top of the electric heating rod, an annular pipeline is arranged outside the feeding pipe, a valve is fixedly connected to the inner wall of the annular pipeline through a pipeline, an air injection pipe is fixedly connected to the output end of the valve, and an annular air bag is arranged at the top of the annular pipeline; and the inner surface of the annular air bag is fixedly connected with an occlusion ring, and an embedding groove is formed in the outer wall of the feeding pipe. According to the device, oxidation and volatilization of raw materials are reduced through the nitrogen injection system, the annular air bag and the occlusion ring seal the feeding pipe to prevent flying dust and explosion, and the heating efficiency, the safety and the product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of heating zinc plating additives, and in particular to a preheater for zinc plating additive raw materials. Background Technology

[0002] Zinc plating additives are a class of chemical auxiliaries used in the zinc plating process. Their main function is to improve the quality of the coating, making it brighter, finer, and more uniform, and to enhance the dispersion, deep-plating capability, and stability of the plating solution. Depending on the zinc plating system, additives can be classified into types for acidic zinc plating, alkaline zincate zinc plating, and chloride zinc plating. Heating is a necessary pretreatment step before using zinc plating additives. Many additives have low solubility at room temperature and are prone to precipitation or separation. Heating allows them to fully dissolve and disperse evenly, preventing spots or roughness in the coating.

[0003] A search revealed that Chinese Patent Publication No. CN218840509U discloses a preheating mechanism for galvanizing additive raw materials. By shaking and vibrating the raw materials, it prevents them from piling up, heats them evenly, improves heating efficiency, saves working time, and ensures the preheating quality of the raw materials.

[0004] In the above technical solution, the heating effect of the raw material is ensured by shaking the raw material. However, the raw material will fly around during the feeding and shaking stages, which may easily cause an explosion risk, thereby reducing the safety and stability of heating. Therefore, a preheater for galvanized additive raw materials is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a preheater for galvanizing additive raw materials, which aims to improve the existing technology of galvanizing additive raw material preheaters to avoid the risk of dust flying and causing explosions during feeding or heating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a preheater for galvanizing additive raw materials, comprising a heating tank, a mixing component at the bottom of the heating tank, a feed pipe fixedly connected to the top of the heating tank, a heat-conducting plate fixedly connected to the inner wall of the heating tank, a heating rod fixedly connected to the inner wall of the heating tank, an installation ring fixedly connected to the top of the heating rod, an annular pipe provided outside the feed pipe, a valve fixedly connected to the inner wall of the annular pipe via a pipe, an air injection pipe fixedly connected to the output end of the valve, and a... The device includes an annular airbag with an engagement ring fixedly connected to its inner surface. An embedding groove is formed on the outer wall of the feed pipe. An air pump is also fixedly connected to the inner wall of the annular pipe via a pipe. A nitrogen generator is fixedly connected to the input end of the air pump via a pipe. A control valve is also fixedly connected to the inner wall of the annular pipe via a pipe. A drain pipe is fixedly connected to the output end of the control valve. A support frame is fixedly connected to the outer wall of the feed pipe, and a limiting ring is fixedly connected to the outer wall of the support frame. An exhaust assembly is provided on the surface of the heating tank to discharge excess nitrogen from the heating tank.

[0007] As a further description of the above technical solution:

[0008] The annular pipe is sleeved on the outer wall of the feed pipe, the air injection pipe passes through the feed pipe and is fixedly connected to the inner wall of the feed pipe, and a collection hopper is fixedly connected to the top of the inner wall of the heating tank.

[0009] As a further description of the above technical solution:

[0010] The outer surface of the annular airbag is fixedly connected to the inner surface of the limiting ring, and the outer wall of the air pump is fixedly connected to the back of the nitrogen generator.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the engagement ring is adapted to the inner wall of the embedding groove, and the end of the drainage tube away from the control valve is fixedly connected to the inner wall of the annular airbag.

[0013] As a further description of the above technical solution:

[0014] The exhaust assembly includes an exhaust pipe, and the end of the exhaust pipe is also fixedly connected to a one-way valve via a pipe.

[0015] As a further description of the above technical solution:

[0016] The exhaust pipe passes through the heat-conducting plate and is fixedly connected to the inner wall of the heat-conducting plate. The exhaust pipe is configured as a rectangular pipe.

[0017] As a further description of the above technical solution:

[0018] The bottom of the inner wall of the exhaust pipe is provided with an inclined surface, and the top of the exhaust pipe is provided with a through groove. A mounting bracket is provided inside the through groove, and a filter screen is fixedly connected to the inner wall of the mounting bracket.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the mounting bracket is adapted to the outer wall of the through groove, and the inner wall of the mounting bracket is magnetically connected to the inner wall of the exhaust pipe by a magnet.

[0021] As a further description of the above technical solution:

[0022] The inner wall of the heating tank is fixedly connected to a transmission pipe, and the end of the transmission pipe is rotatably connected to a fixed sleeve. The inner wall of the fixed sleeve is threadedly connected to a threaded sleeve, and the end of the threaded sleeve is rotatably connected to a telescopic pipe.

[0023] As a further description of the above technical solution:

[0024] The end of the telescopic tube away from the threaded sleeve is fixedly connected to the end of the one-way valve through a rigid tube, and the transmission tube passes through the heat-conducting plate and is fixedly connected to the inner wall of the heat-conducting plate.

[0025] This utility model has the following beneficial effects:

[0026] 1. In this utility model, the nitrogen injection system reduces the oxidation and volatilization of raw materials, the annular airbag and the interlocking ring seal the feed pipe to prevent dust explosion, the heat-insulating tank and the heat-conducting plate combined with the electric heating rod achieve efficient and uniform heating, the mixing component gently stirs the raw materials, the exhaust component filters dust and safely discharges gas, and the collecting hopper concentrates the raw materials to prevent splashing, thereby improving heating efficiency, safety and product quality.

[0027] 2. In this utility model, a portion of nitrogen gas is introduced into the cavity formed by the heat-conducting plate and the tank wall through the transmission pipe, and comes into contact with the heating rod. The threaded connection between the threaded sleeve and the fixed sleeve, together with the telescopic tube, achieves an adjustable connection, thereby optimizing the heat exchange efficiency in the cavity, assisting the heating rod in heat dissipation, promoting uniform temperature distribution in the tank, and improving heating stability and energy utilization efficiency. Attached Figure Description

[0028] Figure 1 This is a front view of the main structure of a preheater for galvanizing additive raw materials proposed in this utility model.

[0029] Figure 2 This is a rear cross-sectional schematic diagram of the main structure of a preheater for galvanizing additive raw materials proposed in this utility model.

[0030] Figure 3This is a cross-sectional view of the main structure of a preheater for galvanizing additive raw materials, showing the removal of the heating rod and the collecting hopper.

[0031] Figure 4 This utility model proposes a preheater for zinc plating additive raw materials. Figure 3 Enlarged view of region A in the middle;

[0032] Figure 5 This utility model proposes a preheater for zinc plating additive raw materials. Figure 3 A magnified schematic diagram of region B in the middle.

[0033] Legend:

[0034] 1. Heating tank; 2. Feed pipe; 3. Heat-conducting plate; 4. Heating rod; 5. Mounting ring; 6. Annular pipe; 7. Mixing assembly; 8. Air injection pipe; 9. Valve; 10. Annular airbag; 11. Engaging ring; 12. Embedded groove; 13. Drain pipe; 14. Control valve; 15. Nitrogen generator; 16. Air pump; 17. Support frame; 18. Restriction ring; 19. Exhaust pipe; 20. Through groove; 21. Mounting frame; 22. Filter screen; 23. Inclined surface; 24. One-way valve; 25. Transfer pipe; 26. Telescopic pipe; 27. Fixed sleeve; 28. Collection hopper; 29. ​​Threaded sleeve. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figures 1-3This utility model provides an embodiment of a preheater for galvanizing additive raw materials, comprising a heating tank 1. A discharge pipe is provided at the bottom of the heating tank 1 for discharging the heated raw material, ensuring that the heated material can be discharged directionally from the equipment. A mixing assembly 7 is provided at the bottom of the heating tank 1, consisting of a motor, a rotating shaft, and stirring blades. The motor drives the rotating shaft to rotate slowly, causing the stirring blades to gently stir the raw material, ensuring uniform distribution of the material during heating and preventing localized overheating or insufficient heating. A feed pipe 2 is fixedly connected to the top of the heating tank 1. A heat-conducting plate 3 is fixedly connected to the inner wall of the heating tank 1, forming a cavity between the heat-conducting plate 3 and the tank wall for installing an electric heating rod 4, forming a heat conduction carrier and providing installation space for the electric heating rod 4. The heating tank 1 is made of heat-insulating material to prevent heat loss, reduce heat diffusion from the tank to the outside, and improve heating efficiency. The electric heating rod 4 is fixedly connected to the inner wall of the heating tank 1, and a mounting bracket is fixedly connected to the top of the electric heating rod 4. Ring 5 is fixedly connected to the inner wall of heating tank 1 and the outer wall of heat-conducting plate 3 on both sides, respectively, to support heating rod 4. Its surface has several sets of equidistantly distributed holes to allow nitrogen gas to flow, providing a channel for nitrogen gas to circulate within the cavity and ensuring smooth gas circulation. An annular pipe 6 is installed outside the feed pipe 2, fitted onto the outer wall of the feed pipe 2. A valve 9 is fixedly connected to the inner wall of the annular pipe 6 via a pipe. An injection pipe 8 is fixedly connected to the output end of valve 9. Several sets of gas pipes 8 and valves 9 are respectively arranged in a circular array around the center point of feed pipe 2, so that nitrogen can be sprayed evenly from the inner wall of feed pipe 2 in multiple directions, increasing the contact area with raw materials. Gas injection pipe 8 passes through feed pipe 2 and is fixedly connected to the inner wall of feed pipe 2. Gas injection pipe 8 enters the inside of feed pipe 2 to contact nitrogen with particles. By introducing inert gas to contact with raw materials, oxidation and volatilization are reduced. The inert gas is used to isolate raw materials from air, reducing the risk of raw materials being deteriorated by oxidation or lost due to volatilization.

[0037] Reference Figures 2-4An annular airbag 10 is installed at the top of the annular pipe 6. An engagement ring 11 is fixedly connected to the inner surface of the annular airbag 10. An embedding groove 12 is formed on the outer wall of the feed pipe 2. The outer wall of the engagement ring 11 matches the inner wall of the embedding groove 12, ensuring a tight fit between the annular airbag 10 and the outer wall of the feed pipe 2, thus initially improving the sealing at the connection. An air pump 16 is also fixedly connected to the inner wall of the annular pipe 6 via a pipe. A nitrogen generator 15 is also fixedly connected to the input end of the air pump 16 via a pipe. The outer wall of the air pump 16 is fixedly connected to the back of the nitrogen generator 15. A control valve 14 is also fixedly connected to the inner wall of the annular pipe 6 via a pipe, enabling precise control of the inflation volume of the annular airbag 10 and adjusting the sealing force. A drainage pipe 13 is fixedly connected to the output end of the control valve 14. The end of the drainage pipe 13 furthest from the control valve 14 is fixedly connected to the inner wall of the annular airbag 10. A support frame 17 is fixedly connected to the outer wall of the feed pipe 2. A limiting ring 18 is fixedly connected to the outer wall of the support frame 17. The limiting ring 18 prevents the axial displacement of the annular airbag 10, ensuring that the sealing surface does not separate under impact. The outer surface of the annular airbag 10 is fixedly connected to the inner surface of the limiting ring 18. The annular airbag 10 can cover the feed pipe 2 and the pipeline for transmitting raw materials. A portion of nitrogen is introduced through the drainage pipe 13 for expansion. The upper and lower sets of interlocking rings 11 contact the embedded groove 12 to increase the sealing performance and avoid the risk of dust explosion caused by feeding. The multiple sealing structure blocks the dust diffusion path and reduces the dust explosion hazard from the source. A collecting hopper 28 is fixedly connected to the top of the inner wall of the heating tank 1. The collecting hopper 28 gathers the raw materials at the center of the heating tank 1, preventing them from being sprayed onto the wall of the heat-conducting plate 3 and preventing the raw materials from directly impacting the heat-conducting plate 3, causing local material accumulation or obstruction of heat conduction.

[0038] Reference Figures 4-5The surface of the heating tank 1 is equipped with an exhaust assembly to discharge excess nitrogen gas, preventing excessive nitrogen from causing excessive pressure and ensuring safe operation of the equipment. The exhaust assembly includes an exhaust pipe 19, which penetrates the heat-conducting plate 3 and is fixedly connected to the inner wall of the heat-conducting plate 3. A one-way valve 24 is a rectangular tube, and the end of the exhaust pipe 19 is also fixedly connected to a one-way valve 24 through a pipe to prevent outside air from flowing back into the tank through the exhaust pipe 19. The bottom of the inner wall of the exhaust pipe 19 has an inclined surface 23, which slopes towards the inner wall of the heating tank 1, allowing it to be introduced into the heating tank 1 by gravity. The inclined surface 23 guides dust to slide into the tank. The top of the pipe 19 is provided with a through groove 20, and a mounting bracket 21 is provided inside the through groove 20. The inner wall of the mounting bracket 21 is adapted to the outer wall of the through groove 20. The inner wall of the mounting bracket 21 is magnetically connected to the inner wall of the exhaust pipe 19 by a magnet. Magnets are embedded in the inner walls of the mounting bracket 21 and the exhaust pipe 19, which can fix the mounting bracket 21 and realize quick disassembly and assembly, which facilitates the cleaning or replacement of the filter screen 22. The filter screen 22 is fixedly connected to the inner wall of the mounting bracket 21. The filter screen 22 is a stainless steel sintered filter element. The filter screen 22 blocks dust and prevents it from being discharged through the exhaust pipe 19, preventing raw material dust from being discharged from the equipment with nitrogen, reducing environmental pollution and raw material waste.

[0039] Reference Figure 5 A transmission pipe 25 is fixedly connected to the inner wall of the heating tank 1. The transmission pipe 25 passes through the heat-conducting plate 3 and is fixedly connected to the inner wall of the heat-conducting plate 3. A fixed sleeve 27 is rotatably connected to the end of the transmission pipe 25. A threaded sleeve 29 is threadedly connected to the inner wall of the fixed sleeve 27. A telescopic pipe 26 is rotatably connected to the end of the threaded sleeve 29. The end of the telescopic pipe 26 away from the threaded sleeve 29 is fixedly connected to the end of the one-way valve 24 through a rigid pipe. The transmission pipe 25 can introduce some nitrogen into the cavity and contact the heating rod 4 to increase the heat uniformity in the heating tank 1.

[0040] Working principle: When the external conveying pipe connects to the feed pipe 2, the annular airbag 10 introduces nitrogen through the drainage pipe 13 and begins to expand. The interlocking ring 11 on the inner surface is embedded in the groove 12 on the outer wall of the feed pipe 2, forming a double sealing structure with the fixing effect of the limiting ring 18. The upper and lower sets of interlocking rings 11 greatly improve the sealing performance at the connection, effectively avoiding the risk of explosion caused by dust during the feeding process. At the same time, the nitrogen generated by the nitrogen generator 15 is pressurized by the air pump 16, and part of it is distributed to each set of valves 9 through the annular pipe 6, and then injected. Gas 8 is injected into the feed pipe 2, making full contact with the falling raw material particles. Utilizing the properties of inert gas, it reduces oxidation and volatilization of the raw material during transport. After entering the heating tank 1, the raw material is collected in the central area of ​​the tank via the collecting hopper 28, avoiding direct spraying onto the surface of the heat-conducting plate 3 and affecting heating efficiency. When the heating system starts, the heating rod 4 is fixed in the cavity between the inner wall of the heating tank 1 and the heat-conducting plate 3 via the mounting ring 5. After being energized, it releases heat and is evenly transferred to the raw material through the heat-conducting plate 3. The heating tank 1 is made of heat-insulating material, in conjunction with… The cavity structure reduces heat loss and ensures stable temperature inside the tank. The mixing component 7 at the bottom, driven by a motor, rotates slowly through a shaft to gently stir the raw materials, making them heat more evenly. Regarding nitrogen circulation, the holes on the surface of the mounting ring 5 provide a channel for nitrogen flow. Some nitrogen enters the one-way valve 24 through the exhaust pipe 19, and then is introduced into the cavity containing the heating rod 4 through the telescopic pipe 26, threaded sleeve 29, and transmission pipe 25. After direct contact with the heating rod 4, a hot airflow is formed, further improving heat transfer efficiency. The inclined surface 23 on the inner wall of the exhaust pipe 19 guides the nitrogen back into the tank using gravity. The mounting bracket 21 at the top is fixed by magnets, and its built-in filter 22 intercepts raw material dust, preventing waste or pollution caused by nitrogen discharge. Throughout the process, the insulation material effectively locks in temperature, inert gas participates in raw material protection, the stirring mechanism ensures even heating, and multiple sealing and filtration devices ensure the safety and environmental friendliness of the equipment operation, achieving the goal of high efficiency, safety, and low loss of galvanized additive raw materials in preheating treatment.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preheater for galvanizing additive raw materials, comprising a heating tank (1), wherein a mixing assembly (7) is provided at the bottom of the heating tank (1), a feed pipe (2) is fixedly connected to the top of the heating tank (1), a heat-conducting plate (3) is fixedly connected to the inner wall of the heating tank (1), an electric heating rod (4) is fixedly connected to the inner wall of the heating tank (1), and an mounting ring (5) is fixedly connected to the top of the electric heating rod (4), characterized in that: An annular pipe (6) is provided on the outside of the feed pipe (2). A valve (9) is fixedly connected to the inner wall of the annular pipe (6) through a pipe. An air injection pipe (8) is fixedly connected to the output end of the valve (9). An annular air bladder (10) is provided at the top of the annular pipe (6). An engagement ring (11) is fixedly connected to the inner surface of the annular air bladder (10). An embedding groove (12) is opened on the outer wall of the feed pipe (2). An air pump (16) is also fixedly connected to the inner wall of the annular pipe (6) through a pipe. The input end of the air pump (16) is also fixedly connected to a nitrogen generator (15) via a pipe. The inner wall of the annular pipe (6) is also fixedly connected to a control valve (14) via a pipe. The output end of the control valve (14) is fixedly connected to a drain pipe (13). The outer wall of the feed pipe (2) is fixedly connected to a support frame (17). The outer wall of the support frame (17) is fixedly connected to a limiting ring (18). The surface of the heating tank (1) is provided with an exhaust assembly for discharging excess nitrogen from the heating tank (1).

2. The zinc plating additive raw material preheater according to claim 1, characterized in that: The annular pipe (6) is sleeved on the outer wall of the feed pipe (2), the air injection pipe (8) passes through the feed pipe (2) and is fixedly connected to the inner wall of the feed pipe (2), and the top of the inner wall of the heating tank (1) is fixedly connected to the collection hopper (28).

3. The zinc plating additive raw material preheater according to claim 1, characterized in that: The outer surface of the annular airbag (10) is fixedly connected to the inner surface of the limiting ring (18), and the outer wall of the air pump (16) is fixedly connected to the back of the nitrogen generator (15).

4. A preheater for galvanizing additive raw materials according to claim 1, characterized in that: The outer wall of the engagement ring (11) is adapted to the inner wall of the embedding groove (12), and the end of the drainage tube (13) away from the control valve (14) is fixedly connected to the inner wall of the annular airbag (10).

5. A preheater for galvanizing additive raw materials according to claim 1, characterized in that: The exhaust assembly includes an exhaust pipe (19), and the end of the exhaust pipe (19) is also fixedly connected to a one-way valve (24) via a pipe.

6. A preheater for galvanizing additive raw materials according to claim 5, characterized in that: The exhaust pipe (19) passes through the heat-conducting plate (3) and is fixedly connected to the inner wall of the heat-conducting plate (3). The exhaust pipe (19) is configured as a rectangular pipe.

7. A preheater for galvanizing additive raw materials according to claim 6, characterized in that: The bottom of the inner wall of the exhaust pipe (19) is provided with a slope (23), and the top of the exhaust pipe (19) is provided with a through groove (20). A mounting bracket (21) is provided inside the through groove (20), and a filter screen (22) is fixedly connected to the inner wall of the mounting bracket (21).

8. A preheater for galvanizing additive raw materials according to claim 7, characterized in that: The inner wall of the mounting bracket (21) is adapted to the outer wall of the through groove (20), and the inner wall of the mounting bracket (21) is magnetically connected to the inner wall of the exhaust pipe (19) by a magnet.

9. A preheater for galvanizing additive raw materials according to claim 1, characterized in that: The inner wall of the heating tank (1) is fixedly connected to a transmission pipe (25), and the end of the transmission pipe (25) is rotatably connected to a fixed sleeve (27). The inner wall of the fixed sleeve (27) is threadedly connected to a threaded sleeve (29), and the end of the threaded sleeve (29) is rotatably connected to a telescopic pipe (26).

10. A preheater for galvanizing additive raw materials according to claim 9, characterized in that: The end of the telescopic tube (26) away from the threaded sleeve (29) is fixedly connected to the end of the one-way valve (24) through a rigid tube, and the transmission tube (25) passes through the heat-conducting plate (3) and is fixedly connected to the inner wall of the heat-conducting plate (3).

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