Water return device capable of preventing steam from being directly injected
By installing structures such as guide shrouds, discs, sleeves, and shroud edges on the exhaust pipe of the lead powder mill, efficient steam liquefaction and cooling are achieved, solving the problem of high cooling water consumption and reducing costs and maintenance expenses.
Patent Information
- Application Number
- CN202511490062.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-01-23
AI Technical Summary
Existing lead powder machines consume a lot of cooling water during operation, resulting in high costs.
Structures such as a flow guide, disc, sleeve, and rim are installed on the exhaust pipe to liquefy and collect the steam through heat exchange, thereby reducing the consumption of cooling water.
It improves steam liquefaction efficiency, reduces cooling water consumption, lowers maintenance costs, and prevents roof damage and corrosion.
Smart Images
Figure CN121371885A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of exhaust pipes for lead powder machines, and particularly to a device for preventing direct steam injection and water return. Background Technology
[0002] Lead powder mills are the core equipment for producing lead powder, and there are two main types: the Tsushima type and the Patton type. The former produces lead powder by oxidizing it through the collision of lead balls, and is suitable for electric bicycle batteries; the latter uses molten lead droplets to react with air, and is mostly used in large batteries. Both types achieve lead oxidation and powder production through mechanical or gas-phase action.
[0003] When the lead powder mill is running, the temperature of its inner cylinder can reach over 150℃. To effectively control the temperature, cooling water from the powder-making workshop needs to be sprayed onto the lead powder mill. After the water is sprayed to the top, it forms an atomized state, and the resulting mist-like steam is guided through the exhaust pipe and finally discharged to the top of the workshop, thus ensuring the stable operation of the equipment.
[0004] The shortcomings of the above-mentioned existing technical solutions are: when the lead powder machine is running, the cooling water is sprayed to the top to form an atomized state and sprayed directly away from the exhaust pipe. Therefore, a lot of cooling water needs to be consumed every day, resulting in relatively high investment costs. Summary of the Invention
[0005] This invention provides a steam direct injection return water device, which can solve the problem of excessive cooling water consumption in the operation of existing lead powder machines.
[0006] A steam direct injection return water device includes a guide shroud installed at the upper end of an exhaust pipe. The inner wall of the guide shroud has an outwardly extending guide slope. A gap is provided between the guide shroud and the end of the exhaust pipe. Steam is output from the exhaust pipe and overflows from the gap along the inner wall of the guide shroud. Some of the steam liquefies after contacting the guide shroud. A disc is fixedly installed on the side of the exhaust pipe. The guide edge at the lower end of the guide shroud is located above the disc. The interior of the disc is connected to the interior of the exhaust pipe. The liquefied water falling from the guide shroud will be collected in the disc and then enter the exhaust pipe to cool the steam in the exhaust pipe.
[0007] As a further aspect of the present invention: a first shroud is fixedly provided on the outer side of the lower edge of the flow guide shroud, the first shroud protrudes below and extends obliquely upward on the outer side, the protrusion is located above the disk, and steam overflows from the gap and spills out along the first shroud, further cooling some of the steam.
[0008] As a further embodiment of the present invention: a sleeve is provided at the lower end of the outer edge of the flow guide, the sleeve is arranged around the outside of the exhaust pipe, the disc is located below the sleeve, and the steam overflows from the gap and moves downward along the sleeve to further cool some of the steam.
[0009] As a further embodiment of the present invention: a second cover edge is fixedly provided on the lower outer edge of the sleeve, the second cover edge protrudes below and extends obliquely upward on the outside, the protrusion is located above the disk, steam overflows from the gap and finally overflows along the second cover edge, further cooling some of the steam.
[0010] As a further aspect of the present invention: a water leakage pipe is fixedly provided on the disc, and the other end of the water leakage pipe is connected to the exhaust pipe.
[0011] As a further aspect of the present invention: the disc has an inward flow guiding structure with a higher outer surface and a lower inner surface, and the drain pipe is fixedly installed on the inner side of the disc.
[0012] As a further embodiment of the present invention: an angle iron is fixedly provided at the upper end of the exhaust pipe, and the angle iron is detachably connected to the bottom of the inner side of the guide shield.
[0013] As a further embodiment of the present invention: a mounting base is fixedly provided on the top of the angle iron, and a docking seat that is compatible with the mounting base is fixedly provided at the bottom of the inner side of the flow guide.
[0014] As a further aspect of the present invention, the sleeve and the flow guide can be detachably connected.
[0015] As a further aspect of the present invention: the upper end of the sleeve is provided with an inwardly extending hook plate, which is fastened to the outside of the flow guide.
[0016] The beneficial effects of this invention are: 1. In this invention, the guide shroud adopts an inverted conical structure with a large contact area on the upper side, allowing for sufficient heat exchange with the air above. When the lead powder machine is running, as steam flows out from the exhaust pipe and overflows along its inner wall into the gap, some of the steam comes into contact with the guide shroud and quickly liquefies. The guide slope on the inner wall of the guide shroud guides the liquefied water to flow precisely to the guide edge, causing it to fall into the lower disc. The liquefied water falling from the guide shroud is collected in the disc and then enters the exhaust pipe to cool the steam inside, thereby improving the steam liquefaction effect and reducing cooling water consumption.
[0017] 2. In this invention, steam overflows from the gap and moves downwards along the sleeve. The large contact area of the sleeve with the outside allows for sufficient heat exchange with the ambient air, greatly improving cooling efficiency. During the steam's movement along the sleeve, more steam liquefies. The cooled liquefied water adheres to the inner wall of the sleeve and eventually falls into the lower disc under gravity, then is guided through the disc into the exhaust pipe for further cooling. The sleeve provides further cooling of the steam, enhancing the overall cooling capacity of the device.
[0018] 3. In this invention, the second cover has a lower protrusion and extends obliquely upwards on the outer side. When steam overflows from the gap, it can fully exchange heat with the outside air, cooling the steam and promoting its liquefaction. Simultaneously, the second cover guides the steam away from the tube sleeve, allowing the tube sleeve to better contact the outside airflow, ensuring the tube sleeve's thermal conductivity and further improving the cooling effect. Furthermore, the lower protrusion of the second cover is located above the disc, facilitating the collection of liquefied water.
[0019] 4. In actual use, the entire lead powder machine line and exhaust pipe are generally located inside the plant. The steam is formed by the vaporization of the surface of the inner cylinder due to the high temperature. The existing steam exhaust pipe is a direct injection type, which causes serious damage and corrosion to the roof. By installing a guide hood on the top of the exhaust pipe, the direct injection of steam into the roof of the plant can be avoided, reducing maintenance costs. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the first embodiment of the anti-steam direct injection return water device provided by the present invention; Figure 2 This is a schematic diagram of the second embodiment of the anti-steam direct injection return water device provided by the present invention; Figure 3 This is a schematic diagram of the third embodiment of the anti-steam direct injection return water device provided by the present invention; Figure 4 This is a schematic diagram of the fourth embodiment of the anti-steam direct injection return water device provided by the present invention.
[0021] Explanation of reference numerals in the attached figures: 1. Exhaust pipe; 2. Angle iron; 201. Mounting base; 3. Draft shield; 301. First shield edge; 302. Pipe sleeve; 303. Second shield edge; 304. Connecting seat; 4. Disc; 5. Drain pipe. Detailed Implementation
[0022] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.
[0023] like Figures 1 to 4As shown in the figure, an embodiment of the present invention provides a steam direct injection return water device, including a guide shroud 3 and an angle iron 2 disposed at the upper end of an exhaust pipe 1. A mounting base 201 is fixedly disposed on the top of the angle iron 2, and a mating seat 304 adapted to the mounting base 201 is fixedly disposed on the bottom inner side of the guide shroud 3. This structure achieves a stable connection between the guide shroud 3 and the angle iron 2. The guide shroud 3 adopts an inverted conical structure, with a large contact area on its upper side, which is conducive to sufficient heat exchange with the air above. The inner wall of the guide shroud 3 is provided with an outwardly extending guide slope, and a gap is provided between the guide shroud 3 and the end of the exhaust pipe 1. When the lead powder machine is running, steam is output from the exhaust pipe 1 and overflows from the gap along the inner wall of the guide shroud 3. During this process, some steam liquefies upon contact with the guide shroud 3, and the liquefied water flows along the guide slope. A disc 4 is fixedly installed on the side of the exhaust pipe 1, and the guide edge of the lower end of the guide shroud 3 is located above the disc 4, so that the liquefied water flowing down from the guide shroud 3 can be caught by the disc 4. The interior of the disc 4 is connected to the interior of the exhaust pipe 1. The liquefied water falling from the guide shroud 3 will be collected in the disc 4 and then enter the exhaust pipe 1 to cool the steam in the exhaust pipe 1, thereby improving the liquefaction effect of the steam and reducing the consumption of cooling water.
[0024] In the second specific embodiment, such as Figure 2 As shown, a first rim 301 is fixedly installed on the outer side of the lower edge of the flow guide shroud 3. The first rim 301 protrudes below and extends obliquely upward on the outer side, with the protrusion located above the disc 4. When steam overflows from the gap, it will overflow along the first rim 301. In this process, the first rim 301 further cools part of the steam. The liquefied water on the first rim 301 flows along the bottom of the first rim 301 and drips from the protrusion into the interior of the disc 4, where it is collected by the disc 4. The first rim 301 can serve as a cooling plate for further cooling, enhancing the cooling effect on the steam, and also as a protective cover for the disc 4, preventing external debris from falling into the disc 4 and causing blockage.
[0025] In the third specific embodiment, such as Figure 3 As shown, a sleeve 302 is fitted around the lower edge of the outer edge of the guide shroud 3, surrounding the outside of the exhaust pipe 1. A disc 4 is located below the sleeve 302. Steam overflows from the gap and moves downwards along the sleeve 302. During this process, the large contact area between the sleeve 302 and the outside environment further improves the cooling efficiency, thus achieving further cooling of some of the steam. The cooled liquefied water adheres to the inner wall of the sleeve 302 and finally falls into the disc 4 under gravity. The disc 4 then guides the liquefied water into the exhaust pipe 1, achieving water recycling.
[0026] In the fourth specific embodiment, a second shroud 303 is fixedly provided on the lower outer edge of the sleeve 302. The second shroud 303 protrudes below and extends obliquely upward on the outer side, with the protrusion located above the disk 4. After steam overflows from the gap, it finally overflows along the second shroud 303. As a cooling structure, the effect of the second shroud 303 is similar to that of the first shroud 301, both of which can cool the steam and liquefy it. At the same time, the second shroud 303 can guide the steam away from the sleeve 302, thereby allowing the sleeve 302 to better contact the external airflow, ensuring its heat conduction capacity and further improving the cooling effect. In addition, an inwardly extending hook plate is provided at the upper end of the sleeve 302. The hook plate is fastened to the outside of the guide shroud 3, realizing the detachable setting of the sleeve 302 and the guide shroud 3, which facilitates later maintenance and replacement. When the device malfunctions or needs cleaning, the sleeve 302 can be easily disassembled for operation.
[0027] Furthermore, a drain pipe 5 is fixedly installed on the disc 4, with the other end of the drain pipe 5 connected to the exhaust pipe 1. Water collected in the disc 4 can be discharged into the exhaust pipe 1 through the drain pipe 5. Alternatively, a hole can be opened on the side of the exhaust pipe 1 to allow water to drain. The disc 4 has an inward-flowing structure with a higher outer surface and a lower inner surface. The drain pipe 5 is fixedly installed on the inner side of the disc 4. This structure facilitates water collection and discharge, ensuring that liquefied water can smoothly enter the exhaust pipe 1 and participate in the steam cooling process.
[0028] In practical use, exhaust pipe 1 is 3.5m long and 500mm in diameter, with three additional pipes at the top, each 300mm and 3mm in length. 3mm angle iron 2, with a 500mm wide inverted cone welded to the top. A 900mm disc 4 is welded 100mm below the top of the pipe. Three 10mm drain pipes 5 are installed on the disc 4. The steam inside the pipe is sprayed to the top and its impact force is reduced by the upper inverted cone device. The steam condenses and drips into the water receiving tray along the inverted cone device, and then falls into the inner cylinder of the lead powder machine through the water receiving tray, achieving a secondary cooling state and reducing water waste.
[0029] In industrial production settings, the entire lead powder mill production line and exhaust pipe 1 are typically located inside the plant. Due to the high temperature of the inner cylinder, vaporization occurs on the surface, resulting in steam spray. However, existing steam exhaust pipes employ a direct injection design, causing a large amount of steam to directly spray onto the plant roof, resulting in severe damage and significant corrosion, greatly increasing the plant's maintenance costs.
[0030] To address this issue, a deflector 3 can be installed on top of the exhaust pipe 1. The deflector 3 effectively changes the direction of steam discharge, preventing steam from directly impacting the roof of the plant, thereby reducing the degree of damage and corrosion risk to the roof and lowering maintenance costs.
[0031] Furthermore, as a further improvement to the operating environment, the exhaust outlet can be connected to the roof, allowing steam to be directly discharged to the outside of the workshop. Due to the high temperature inside the pipes and the low temperature outside the workshop, condensation occurs when the cold air meets the hot pipes, forming a small amount of water. This water collects on the receiving disc 4 and then drips onto the exhaust pipe 1, helping to lower its temperature. Simultaneously, to prevent rainwater from seeping into the workshop, waterproofing treatment must be applied at the connection between the exhaust pipe 1 and the roof. Additionally, applying rust-preventive paint to the roof can effectively prevent some moisture from corroding it, extending its service life and ensuring normal production operations within the plant.
[0032] Working Principle: When the lead powder machine is running, steam is output from exhaust pipe 1. The steam flows along the inner wall of the guide shroud 3 to the gap between the guide shroud 3 and the end of exhaust pipe 1 and overflows. During this process, because the upper side of the guide shroud 3 has a large contact area, it can fully exchange heat with the air above. Furthermore, the inner wall of the guide shroud 3 has a guide slope extending outwards. Some of the steam liquefies upon contact with the guide shroud 3, and the liquefied water flows along the guide slope to the lower end of the guide shroud 3. The guide edge at the lower end of the guide shroud 3 is located above the disc 4, and the liquefied water falls into the disc 4. The interior of the disc 4 is connected to the interior of the exhaust pipe 1. The liquefied water falling into the disc 4 enters the exhaust pipe 1, cooling the steam inside the exhaust pipe 1, thereby improving the steam liquefaction effect and reducing cooling water consumption.
[0033] In the second specific embodiment, the lead powder machine generates steam during operation. The steam overflows from the gap between the exhaust pipe 1 and the guide shroud 3, and then spills out along the first shroud edge 301 on the outer side of the lower edge of the guide shroud 3. The first shroud edge 301 bulges downwards and extends obliquely upwards outwards. During this process, the first shroud edge 301 exchanges heat with the outside air, further cooling part of the steam and liquefying it. The liquefied water on the first shroud edge 301 flows along its bottom and drips from the bulge into the interior of the lower disc 4. The disc 4 collects the liquefied water for subsequent introduction into the exhaust pipe 1 to participate in steam cooling. Simultaneously, the first shroud edge 301 also prevents external debris from falling into the disc 4 and causing blockages.
[0034] In the third specific embodiment, when the lead powder machine is working, steam overflows from the gap between the exhaust pipe 1 and the guide shroud 3, and then moves downward along the sleeve 302 surrounding the outside of the exhaust pipe 1. Because the sleeve 302 has a large contact area with the outside, the steam can fully exchange heat with the outside air as it moves downward along the sleeve 302, further improving the cooling efficiency and thus achieving further cooling of some of the steam, allowing more steam to liquefy. The cooled liquefied water adheres to the inner wall of the sleeve 302 and finally falls into the lower disc 4 under gravity. The disc 4 then guides the liquefied water into the exhaust pipe 1, realizing water recycling and participating in the cooling of the steam inside the exhaust pipe 1.
[0035] In the fourth specific embodiment, the lead powder machine generates steam during operation. The steam overflows from the gap between the exhaust pipe 1 and the guide shroud 3, and finally spills out along the second shroud edge 303 at the lower outer edge of the sleeve 302. The second shroud edge 303 protrudes downwards and extends obliquely upwards outwards. Similar to the first shroud edge 301, it serves as a cooling structure. During the steam spillage along it, it exchanges heat with the outside air, cooling the steam and causing it to liquefy. Simultaneously, the second shroud edge 303 guides the steam away from the sleeve 302, allowing the sleeve 302 to better contact the outside airflow, ensuring its thermal conductivity and further improving the cooling effect. The liquefied water also falls into the lower disc 4 and then enters the exhaust pipe 1 to participate in cooling. When the device malfunctions or needs cleaning, the sleeve 302 is removable because of the inwardly extending hook plate at the upper end that engages with the outside of the guide shroud 3, allowing for easy disassembly and operation.
[0036] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A steam-proof direct-spray water return device, characterized by, The exhaust pipe (1) is provided with a fairing (3) at the upper end of the exhaust pipe (1), the inner wall of the fairing (3) is provided with a fairing slope extending outward, and a gap is formed between the fairing (3) and the end of the exhaust pipe (1). Steam is output from the exhaust pipe (1) and overflows from the gap position along the inner wall of the fairing (3), and part of the steam is liquefied after contacting the fairing (3); The side of the exhaust pipe (1) is fixedly provided with a disc (4), and the fairing edge of the lower end of the fairing (3) is located above the disc (4). The inside of the disc (4) is in communication with the inside of the exhaust pipe (1), and the liquefied water falling from the fairing (3) is concentrated in the disc (4) and then enters the exhaust pipe (1) to cool the steam in the exhaust pipe (1).
2. A steam-proof direct-spray water return device according to claim 1, wherein The outer side of the lower edge of the fairing (3) is fixedly provided with a first cover edge (301), the lower side of the first cover edge (301) is protruding, and the outer side extends upward obliquely. The protrusion is located above the disc (4). After the steam overflows from the gap, it further cools part of the steam by overflowing along the first cover edge (301).
3. A steam-proof direct-spray water return device according to claim 1, wherein The outer edge of the lower end of the fairing (3) is provided with a pipe sleeve (302), which is arranged around the outer side of the exhaust pipe (1). The disc (4) is located below the pipe sleeve (302). After the steam overflows from the gap, it further cools part of the steam by moving downward along the pipe sleeve (302).
4. A vapour-proof direct-spray return water device according to claim 3, characterised in that The outer edge of the lower end of the fairing (3) is provided with a second cover edge (303), which is protruding below and extends outward obliquely. The protrusion is located above the disc (4). After the steam overflows from the gap, it further cools part of the steam by overflowing along the second cover edge (303).
5. A vapour-proof direct-spray water return device as claimed in claim 2 or 3 or 4, characterised in that, The disc (4) is fixedly provided with a water leakage pipe (5), and the other end of the water leakage pipe (5) is in communication with the exhaust pipe (1).
6. A vapour-proof direct-spray water return device as claimed in claim 5, characterised in that, The disc (4) is a inwardly guiding structure with high outside and low inside. The water leakage pipe (5) is fixedly arranged on the inner side of the disc (4).
7. A vapour-proof direct-spray water return device as claimed in claim 6, characterised in that, The upper end of the exhaust pipe (1) is fixedly provided with an angle iron (2), and the angle iron (2) is detachably connected with the inner bottom of the fairing (3).
8. A vapour-proof direct-spray water return device as claimed in claim 7, characterised in that, The top of the angle iron (2) is fixedly provided with a mounting seat (201), and the inner bottom of the fairing (3) is fixedly provided with a butt joint seat (304) matched with the mounting seat (201).
9. A vapour-proof direct-spray water return device as claimed in claim 4, characterised in that, The pipe sleeve (302) is detachably connected with the fairing (3).
10. A vapour-proof direct-spray water return device as claimed in claim 9, characterised in that, The upper end of the pipe sleeve (302) is provided with an inwardly extending hook plate, which is buckled on the outer side of the fairing (3).