Water-cooled furnace cover assembly with uniform cooling function

Abstract

The water-cooled furnace cover assembly comprises a furnace cover body, the furnace cover body comprises a plurality of cooling coils, and the two ends of each cooling coil are the water inlet end and the water outlet end respectively; the two cold conveying assemblies are a cold inlet unit and a cold outlet unit respectively and each comprise a water pump, a main pipe and a branch pipe. The switching assembly comprises a driving unit and a switching piece, the switching piece is provided with two switching channels with the inner diameter being the same as that of the cooling coil pipe, and the cooling coil pipe and the two switching channels define a cooling pipeline; the cleaning balls are arranged in the cooling pipelines in a one-to-one correspondence mode and comprise ball bodies and cleaning pieces. According to the water-cooled furnace cover with the uniform cooling function, cooling water is driven to flow in the cooling coil through the two cold conveying assemblies, the cleaning ball moves along water flow along the cooling coil, a water film and scale on the inner wall of the cooling coil are damaged through the elastic cleaning piece, the flowability of water near the pipe wall is guaranteed, too large thermal resistance and local overheating are avoided, and cooling uniformity is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water-cooled furnace cover technology, and in particular to a water-cooled furnace cover assembly with uniform cooling. Background Technology

[0002] Water-cooled furnace covers are key components on the top of metallurgical furnaces, electric arc furnaces, and refining furnaces. Their main function is to cover the furnace opening and seal the high-temperature flue gas, while also forcibly cooling the furnace cover itself to ensure it is not burned out in high-temperature environments.

[0003] Most existing water-cooled furnace covers adopt a multi-layer concentric annular cooling coil structure, relying on cooling water to continuously cool the furnace cover in order to ensure stable operation of the furnace cover under high-temperature conditions. However, during long-term operation of water-cooled furnace covers, scale easily forms on the inner walls of the pipes, increasing heat transfer resistance, reducing heat exchange efficiency and cooling effect. In severe cases, it can even cause local pipe blockage and lead to overheating and deformation damage to the furnace cover. Furthermore, a stable water film easily forms on the pipe walls, affecting heat exchange and generating steam. Specifically, when cooling water flows inside the pipes, a slow-flowing, relatively still water film forms near the pipe wall. This water film has a low thermal conductivity, severely hindering heat transfer. Simultaneously, the water film is constantly exposed to the high-temperature radiation of the furnace cover, easily vaporizing to form water vapor, creating a steam insulation layer near the pipe wall, leading to localized overheating, affecting cooling uniformity and the safe operation of the furnace cover. In addition, to reduce scale formation, chemical scale inhibitors are usually added to the cooling water circulation system. However, it is difficult to ensure the uniformity of agent addition on the inner walls of the pipes, resulting in excessively high local agent concentrations that corrode the pipes, while insufficient local agent concentrations are ineffective in inhibiting scale. This leads to low agent utilization and increased long-term operating costs.

[0004] Therefore, it is necessary to improve the water-cooled furnace cover in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the prior art and provide a water-cooled furnace cover assembly that significantly reduces scale, improves cooling uniformity and efficiency, and prevents local overheating.

[0006] To achieve the above-mentioned technical effects, the technical solution of the present invention is: a water-cooled furnace cover assembly with uniform cooling, comprising: The furnace cover body is provided with a furnace door, a feeding port, a flue gas port and an electrode port. The electrode port is located at the top of the furnace cover body. The furnace cover body includes several cooling coils that are coaxially aligned and sequentially sealed and connected. The two ends of the cooling coils are adjacent to each other and are respectively the water inlet and the water outlet. The two cooling components are a cooling inlet unit and a cooling outlet unit, and each includes a water pump for connecting to a cooling water source, a main pipe connected to the end of the water pump away from the cooling water source, and a branch pipe connected to the main pipe and corresponding to the cooling coil. A switching component, corresponding one-to-one with the cooling coil, is disposed between the corresponding cooling coil and the two cooling supply components. It includes a drive unit and a switching element. The switching element is provided with two switching channels with the same inner diameter as the inner diameter of the cooling coil. The drive unit drives the switching element to move and switch the positions of the two switching channels. The branch pipe of the cooling inlet unit is connected to the water inlet of the corresponding cooling coil through one of the switching channels, and the branch pipe of the cooling outlet unit is connected to the water outlet of the corresponding cooling coil through the other switching channel, so that the cooling coil and the two switching channels enclose and form a cooling pipeline. Cleaning balls are installed one-to-one within the cooling pipes. Each ball has an outer diameter smaller than the inner diameter of the cooling coil and is rigid, and a cleaning element is installed outside the ball and is elastic. The cleaning element is bristles densely distributed on the ball or a cleaning layer installed on the ball. The cleaning element abuts against the inner wall of the cooling pipe.

[0007] Preferably, to enhance cooling uniformity and scale inhibition effect on the cooling coil, the cleaning ball further includes flow channels with a spiral trajectory extending to its outer surface at both ends.

[0008] Preferably, in order to prevent the cleaning ball from entering the cooling supply assembly, a water flow interceptor is provided at the end of the switching channel corresponding to the water outlet, away from the cooling coil. The water flow interceptor is used to prevent the cleaning ball from entering the branch pipe of the cooling unit and to allow water to flow through.

[0009] Preferably, in order to facilitate assembly and avoid errors during the assembly process, a water flow interceptor is provided at the end of each of the two switching channels away from the cooling coil.

[0010] Preferably, in order to achieve the position swapping of the two switching channels, the switching component includes a hollow outer shell and a switching disk that is sealed and fitted to the inner wall of the outer shell. The switching disk is a disc and has switching through holes arranged in a circular array around its own axis. The outer shell has two inlet and outlet through holes on each of its two facing sides. The driving unit drives the switching disk to rotate around its own axis, so that the switching through holes communicate with the inlet and outlet through holes on both sides of the outer shell to form a switching channel while adjusting the position of the switching through holes.

[0011] Preferably, in order to detect whether a cleaning ball passes through the outlet of the cooling coil, the switching assembly further includes a detection unit, which is used to detect whether the cleaning ball passes through the outlet.

[0012] Preferably, in order to detect whether the cleaning ball has entered the switching through hole, the side wall of the cooling coil is provided with an observation port that is coaxially aligned and adjacent to the water outlet. The observation port is provided with an observation window. The detection unit includes a light emitter and a light receiver that are both connected to and aligned with the outer shell. The light emitter, the two observation windows and the light receiver are sequentially distributed on the same straight line.

[0013] Preferably, in order to improve detection accuracy, the detection unit further includes a sealing cylinder, the sealing cylinder, the cooling coil and the outer shell forming a sealed cavity, and the emitting end of the light emitter and the receiving end of the light receiver are both located inside the sealed cavity.

[0014] Preferably, in order to facilitate the replacement and addition of cleaning balls and to facilitate maintenance, the outer shell is also provided with a disassembly port with an inner diameter larger than the outer diameter of the ball. The disassembly port is detachably connected to a sealing plug. The rotation path of the switching through hole includes a disassembly station. In the disassembly station, the switching through hole is directly connected to the disassembly port.

[0015] Preferably, in order to improve the scale inhibition effect, the outer shell is also provided with a filling port, and the rotation path of the switching through hole includes a filling station. At the filling station, the switching through hole is directly connected to the filling port. The filling port is connected to a filling unit, which is used to add scale inhibitor into the switching through hole through the filling port.

[0016] In summary, compared with the prior art, the water-cooled furnace cover assembly of the present invention, which provides uniform cooling, uses two cooling components to drive the cooling water to flow in the cooling coil. The cleaning ball moves along the cooling coil with the water flow and breaks the water film and scale on the inner wall of the cooling coil through the elastic cleaning component, ensuring the fluidity of the water near the pipe wall, avoiding excessive thermal resistance and local overheating, and ensuring uniform cooling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment; Figure 2 yes Figure 1 An explosion diagram;

[0018] Figure 3 yes Figure 2 Enlarged view of part A; Figure 4 This is a schematic diagram of the structure of the furnace cover body in the first embodiment; Figure 5 yes Figure 4 An explosion diagram; Figure 6 This is a schematic diagram of the switching component in the first embodiment; Figure 7 yes Figure 6Cross-sectional structural diagram; Figure 8 yes Figure 6 An explosion diagram; Figure 9 This is a schematic diagram of the cleaning ball in the first embodiment; Figure 10 This is a schematic diagram of the cleaning ball in the second embodiment; Figure 11 yes Figure 10 Cross-sectional structural diagram; Figure 12 This is a schematic diagram of the cleaning ball in the third embodiment; Figure 13 yes Figure 12 An explosion diagram; In the diagram: 1. Furnace cover body; 101. Furnace door; 102. Charging port; 103. Flue gas outlet; 104. Electrode outlet; 11. Cooling coil; 111. Water inlet; 112. Water outlet; 113. Observation window; 2. Cooling assembly; 21. Water pump; 22. Main pipe; 23. Branch pipe; 3. Switching assembly; 31. Drive unit; 32. Water flow interceptor; 33. Outer shell; 331. Inlet / outlet through hole; 332. Disassembly / assembly port; 333. Sealing plug; 334. Charging port; 34. Switching disc; 341. Switching through hole; 35. 351. Detection unit; 352. Light emitter; 353. Light receiver; 354. Sealing cylinder; 36. Feeding unit; 361. Hopper; 3611. Feeding pipe; 3612. Distance sensor; 362. Drop pipe; 363. Conveying pipe; 364. Transmission motor; 365. Transmission shaft; 366. Spiral blade; 4. Cleaning ball; 41. Ball; 411. Inner ball core; 412. Outer ball sleeve; 42. Cleaning component; 421. Cleaning pad; 43. Diversion channel; 431. Outer groove; 432. Inner groove; 433. Recess. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0020] First Embodiment

[0021] like Figures 1-9 As shown, a water-cooled furnace cover assembly with uniform cooling according to a first embodiment of the present invention includes: The furnace cover body 1 is provided with a furnace door 101, a feeding port 102, a flue gas port 103 and an electrode port 104. The electrode port 104 is located at the top of the furnace cover body 1. The furnace cover body 1 includes several cooling coils 11 that are coaxially connected and sealed in sequence. The two ends of the cooling coils 11 are adjacent to each other and are respectively the water inlet 111 and the water outlet 112. The two cooling components 2 are a cooling inlet unit and a cooling outlet unit, and each includes a water pump 21 for connecting to the cooling water source, a main pipe 22 at the end of the water pump 21 away from the cooling water source, and a branch pipe 23 connected to the main pipe 22 and corresponding to the cooling coil 11. The switching component 3 corresponds one-to-one with the cooling coil 11 and is set between the corresponding cooling coil 11 and the two cooling supply components 2. It includes a drive unit 31 and a switching element. The switching element is provided with two switching channels with the same inner diameter as the inner diameter of the cooling coil 11. The drive unit 31 drives the switching element to move to change the position of the two switching channels. The branch pipe 23 of the cooling inlet unit is connected to the water inlet 111 of the corresponding cooling coil 11 through one of the switching channels, and the branch pipe 23 of the cooling outlet unit is connected to the water outlet 112 of the corresponding cooling coil 11 through the other switching channel, so that the cooling coil 11 and the two switching channels enclose and form a cooling pipeline. The cleaning balls 4 are installed one-to-one in the cooling pipes. They include rigid balls 41 with an outer diameter smaller than the inner diameter of the cooling coil 11 and elastic cleaning elements 42 installed outside the balls 41. The cleaning elements 42 are bristles densely distributed on the balls 41 or cleaning layers installed on the balls 41. The cleaning elements 42 abut against the inner wall of the cooling pipes.

[0022] In the furnace cover body 1 of this embodiment, the furnace door 101 is used to connect the furnace door cover, which can open and close the furnace door to facilitate workers to observe the working conditions inside the furnace and perform maintenance operations such as temperature measurement, sampling, and inspection. It can also be temporarily opened for heat dissipation when necessary. The charging port 102 can add raw materials, alloy materials, auxiliary materials and other production materials into the furnace, thereby eliminating the need to frequently open the main furnace door, reducing heat loss and flue gas overflow. The exhaust port 103 is used to discharge high-temperature flue gas and dust from the furnace, connecting the flue and the dust removal system to ensure normal pressure inside the furnace and achieve environmentally friendly emissions. The electrode port 104 is used to install and pass through the electrode, which extends into the furnace through the electrode port 104 to generate an electric arc for heating.

[0023] Since the furnace cover body 1 includes multiple cooling coils 11 with a long tube length, two cooling conveying components 2 are set up to promote water flow, namely a cooling inlet unit and a cooling outlet unit. The cooling inlet unit draws cooling water from the cooling water source and delivers it to the main pipe 22. The cooling water in the main pipe 22 is divided into multiple branches 23 and delivered to each cooling coil 11. The cooling outlet unit draws cooling water from each cooling coil 11 through a water pump 21, and the water flows into the main pipe 22 through multiple branches 23. Then, the water flows along the main pipe 22 and enters the cooling water source through the water pump 21. In this way, the cooling water is circulated, reducing the waste of cooling water and lowering the cooling cost.

[0024] A switching assembly 3 is also provided between the two cooling components 2 and the inlet 111 and outlet 112 of the cooling coil 11. In the switching assembly 3, the position of the two switching channels on the switching element is controlled by the drive unit 31. The two switching channels form a cooling pipeline with the inlet 111 and outlet 112 respectively. Cleaning balls 4 flow in the cooling pipeline. Therefore, the cleaning balls 4 enter the cooling coil 11 through the switching channel at the starting position and flow through the cooling coil 11 into the switching channel at the end position. At this time, the position of the two switching channels is changed, thereby changing the position of the cleaning balls 4, so that the cleaning balls 4 again enter the switching channel at the end position from the switching channel at the starting position of the cooling pipeline, through the cooling coil 11, and then change the position of the two switching channels again, so that the cleaning balls 4 return to the switching channel at the starting position of the cooling pipeline. This cycle is repeated so that the cleaning balls 4 can pass through the switching channels repeatedly.

[0025] In this embodiment, the cleaning ball 4 includes a ball 41 and a cleaning element 42 disposed on the ball 41. The cleaning element 42 is bristles densely distributed on the ball 41. The outer diameter of the ball 41 is smaller than the inner diameter of the cooling pipe, thus creating a gap between the outer surface of the ball 41 and the inner wall of the cooling pipe for water flow. Furthermore, the bristles abut against the inner wall of the cooling pipe. As a result, the ball 41 is subjected to the impact force of the water flow within the cooling pipe. Under the action of the water flow, the cleaning ball 4 moves along the cooling pipe, utilizing the elastic bristles to act on the cooling pipe. The cleaning ball 4 can break the water film on the inner wall of the cooling coil 11, thereby enhancing the water flow near the inner wall of the cooling coil 11 and avoiding poor water flow in a single location and the generation of steam after long-term heating. In addition, by contacting the inner wall of the cooling coil 11 with the bristles, the scale adhering to the inner wall can be removed, avoiding scale buildup, which would increase thermal resistance and affect the cooling effect. Thus, by moving the cleaning ball 4 along the cooling coil 11, the water film and scale adhering to the inner wall of the cooling coil 11 are removed, ensuring the uniformity of cooling of the cooling coil 11.

[0026] A further improvement is that a water flow interceptor 32 is provided in the switching channel corresponding to the water outlet 112, at the end away from the cooling coil 11. The water flow interceptor 32 is used to prevent the cleaning ball 4 from entering the branch pipe 23 of the cooling unit and the water supply flow through it.

[0027] By setting up the water flow interceptor 32, cooling water can pass through on the one hand, and the cleaning ball 4 can be intercepted on the other hand to prevent the cleaning ball 4 from entering the branch pipe 23, ensuring that the cleaning ball 4 is always in the cooling pipe.

[0028] A further improvement is that water flow interceptors 32 are installed at the ends of the two switching channels that are away from the cooling coil 11.

[0029] This design avoids the situation where, during actual assembly and installation, the switching channel corresponding to the water outlet 112 is missing a water-blocking component 32 due to worker negligence, which could cause the cleaning ball 4 to detach from the cooling pipe during actual operation. By installing water-blocking components 32 in both switching channels, installation is facilitated.

[0030] A further improvement is that the switching component includes a hollow outer shell 33 and a switching disk 34 that is sealed and fitted to the inner wall of the outer shell 33. The switching disk 34 is a disc and has switching through holes 341 arranged in a ring array with its own axis as the center line. The outer shell 33 has two inlet and outlet through holes 331 on both sides facing each other. The driving unit 31 drives the switching disk 34 to rotate with its own axis as the center line, so that the switching through holes 341 are connected with the inlet and outlet through holes 331 on both sides of the outer shell 33 to form a switching channel while adjusting the position of the switching through holes 341.

[0031] Specifically, in this embodiment, both the inlet end 111 and the outlet end 112 of the cooling coil 11 are set to face upwards. Of course, depending on the actual situation, the opening direction can also be other angles.

[0032] Based on the opening directions of the inlet 111 and outlet 112 of the cooling coil 11, the outer casing 33 of the switching unit is fixed above the inlet 111 and outlet 112. Both the outer casing 33 and the switching disk 34 are horizontal discs. The outer circumferential edge of the switching disk 34 is sealed against the inner circumferential wall of the outer casing 33. The top and bottom surfaces of the switching disk 34 are sealed against the inner top and inner bottom walls of the outer casing 33, respectively. Four switching through holes 341 are arranged in a ring array on the switching disk 34. The center line of the ring array of the four switching through holes 341 coincides with the center line of the switching disk 34. The top and bottom surfaces of the outer casing 33 are each provided with two inlet and outlet through holes 331. The drive unit 31 The drive switching disk 34 rotates around its own axis inside the housing 33. Specifically, the drive unit 31 is a rotary motor, which is fixed at the bottom of the housing 33. Its output end is sealed upwards and passes through the top of the housing 33 and is fixedly connected to the switching disk 34 along the same axis. The movement trajectory of the switching through hole 341 includes the connecting station. At the connecting station, two of the switching through holes 341 are respectively connected to the two inlet and outlet through holes 331 on the top and bottom surfaces of the housing 33 along the same axis. At this time, the switching through hole 341 and the two inlet and outlet through holes 331 combine to form a switching channel. Two water interceptors 32 are provided, which are fixed one-to-one in the two inlet and outlet through holes 331 on the top of the housing 33.

[0033] With this design, the position of the switching disk 34 is adjusted by the drive unit 31, so that the two switching through holes 341 move to the connected position. At this time, the switching through hole 341 is connected to the two upper and lower inlet and outlet through holes 331 on the coaxial center line, forming a switching channel. This allows the cleaning ball 4 to move upward from the outlet end 112 of the cooling coil 11 and enter the upper switching through hole 341. After being blocked by the water interceptor 32 of the upper inlet and outlet through hole 331, the drive unit 31 adjusts the position of the switching disk 34 again. After rotating the switching disk 34 half-shaft, the switching through hole 341 containing the cleaning ball 4 rotates to another connected position. In this position, the coaxial center line of the switching through hole 341 is connected to the top of the water inlet end 111. When the cooling unit is running, the water flow generated flows out from the branch pipe 23 and acts downward on the cleaning ball 4, so that the cleaning ball 4 passes through the lower inlet and outlet through hole 331 and enters the corresponding cooling coil 11 from the water inlet end 111.

[0034] Thus, after the cleaning ball 4 enters one of the switching holes 341 of the switching disk 34 through the water outlet 112, the position of the switching disk 34 is changed by the drive unit 31, so that the switching hole 341 rotates to above the water inlet 111, so that the downward flowing water can drive the cleaning ball 4 to move downward and enter the cooling coil 11 from the water inlet 111. This allows the cleaning ball 4 to flow multiple times in the cooling coil 11, improving the cooling uniformity and efficiency of the water-cooled furnace cover and enhancing the cooling effect.

[0035] A further improvement is that the switching component 3 also includes a detection unit 35, which is used to detect whether the cleaning ball 4 passes through the water outlet 112.

[0036] The detection unit 35 facilitates the detection of whether a cleaning ball 4 passes through the outlet 112 of the cooling coil 11, so that after the cleaning ball 4 is detected to pass through the outlet 112, the position of the switching disk 34 can be adjusted by the drive unit 31.

[0037] A further improvement is that the side wall of the cooling coil 11 is provided with an observation port that is coaxially aligned and adjacent to the water outlet 112. An observation window 113 is provided inside the observation port. The detection unit 35 includes a light emitter 351 and a light receiver 352 that are both connected to and aligned with the outer casing 33. The light emitter 351, the two observation windows 113 and the light receiver 352 are distributed sequentially on the same straight line.

[0038] Light is emitted by the light emitter 351. After passing through the two observation windows 113 and the cooling water in the cooling coil 11, the light shines on the light receiver 352. The light receiver 352 receives the light intensity. When a cleaning ball 4 passes through the water outlet 112, the light is blocked by the cleaning ball 4. At this time, the amount of light that the light receiver 352 can receive is greatly reduced, so that it can be determined that a cleaning ball 4 is passing through the water outlet 112. This makes it convenient for the subsequent drive unit 31 to drive the switching disk 34 to rotate and adjust the position of the switching through hole 341.

[0039] A further improvement is that the detection unit 35 also includes a sealing cylinder 353, which, together with the cooling coil 11 and the outer shell 33, forms a sealed cavity, where the emitting end of the light emitter 351 and the receiving end of the light receiver 352 are both located within the sealed cavity.

[0040] By setting up the sealing cylinder 353, the detection environment can be surrounded, preventing the operating environment of the light emitter 351 and the light receiver 352 from being affected by external environmental interference, thus ensuring detection accuracy.

[0041] A further improvement is that the outer casing 33 is also provided with a disassembly port 332 with an inner diameter larger than the outer diameter of the ball 41. The disassembly port 332 is detachably connected to a sealing plug 333. The rotation path of the switching through hole 341 includes a disassembly station. In the disassembly station, the switching through hole 341 and the disassembly port 332 are directly connected. The outer casing 33 is also provided with a filling port 334. The rotation path of the switching through hole 341 includes a filling station. In the filling station, the switching through hole 341 and the filling port 334 are directly connected. The filling port 334 is connected to a filling unit 36. The filling unit 36 ​​is used to add scale inhibitor into the switching through hole 341 through the filling port 334.

[0042] Specifically, the disassembly / assembly port 332 is located on the top surface of the housing 33 and is threadedly connected to a sealing plug 333. Similarly, the filling port 334 is located on the top surface of the housing 33. The two inlet / outlet holes 331, the disassembly / assembly port 332, and the filling port 334 are arranged in a circular array on the top surface of the housing 33, with their distribution axis coinciding with the axis of the housing 33. The line connecting the centers of the disassembly / assembly port 332 and the filling port 334 intersects perpendicularly with the line connecting the centers of the two inlet / outlet holes 331, and the intersection point is the center of the circle on the top surface of the housing 33.

[0043] The drive unit 31 is a stepper motor with a step angle of 90°. In the initial state, two of the switching through holes 341 are coaxially connected to the two inlet and outlet through holes 331 on the top surface of the housing 33. The remaining two switching through holes 341 are coaxially connected to the disassembly port 332 and the filling port 334, respectively. Thus, each time the stepper motor runs, it can drive the switching disk 34 to rotate 90°, adjusting the position of the four switching through holes 341 so that the four switching through holes 341 are coaxially connected to the two inlet and outlet through holes 331, the disassembly port 332 and the filling port 334, respectively. This facilitates the addition or removal of the cleaning ball 4 from the switching through hole 341 through the disassembly port 332. At the same time, the scale inhibitor is added to the switching through hole 341 through the filling unit 36. After rotating again, the scale inhibitor can flow into the cooling coil 11 with the water flow.

[0044] Furthermore, when the cleaning ball 4 enters the cooling coil 11 through the switching hole 341 and the water inlet 111, the cleaning ball 4 moves along the cooling coil 11 with the water flow, which can also dissolve the scale inhibitor in the cooling coil 11 into the cooling water, so that the scale inhibitor is evenly distributed in the cooling coil 11. This avoids the scale inhibitor concentration in some areas of the cooling coil 11 being too high or too low. In this way, chemical descaling is achieved through uniform dissolution, which, together with the moving cleaning ball 4, performs physical descaling. The two work together to further prevent scale from forming on the inner wall of the cooling coil 11, which would increase thermal resistance and affect the heat exchange effect.

[0045] It should be noted that when the cleaning ball 4 enters one of the switching holes 341 through the water outlet 112, the drive unit 31 drives the switching disk 34 to rotate 90°, so that the switching hole 341 is connected to the feeding port 334. Then, the feeding unit 36 ​​can add solid powdered scale inhibitor to the switching hole 341, so that the scale inhibitor adheres to the cleaning ball 4. When the drive unit 31 drives the switching disk 34 to rotate 90° again, the cleaning ball 4 can also carry the scale inhibitor into the cooling coil 11. The scale inhibitor slowly circulates in the cooling coil 11. The release process ensures that the agent is evenly distributed within the cooling coil, achieving a combination of physical descaling and chemical scale inhibition. This maintains the cleanliness of the inner wall of the cooling coil 11 for a long time, inhibiting scale buildup at its source. The scale inhibitor can be quantitatively added into the switching through-hole 341 through the feeding unit 36. The cleaning ball 4 acts as a guide, allowing the scale inhibitor to move with the ball and gradually dissolve and release within the cooling coil 11. This avoids excessively high local agent concentrations that could corrode the pipes and prevents agent waste. It improves the utilization rate of the scale inhibitor, reduces the amount of agent used, and makes the device safer and more environmentally friendly.

[0046] In this embodiment, the feeding unit 36 ​​includes a horizontal feeding pipe 363. One end of the feeding pipe 363 is connected to the feeding port 334, and the other end is fixedly and sealed to a transmission motor 364. The transmission motor 364 is coaxially connected to a horizontal transmission shaft 365. The transmission shaft 365 is coaxially located inside the feeding pipe 363 and is fixedly connected to a spiral blade 366 that is clearance-fitted with the inner wall of the feeding pipe 363. A hopper 361 is provided directly above the feeding pipe 363. The bottom of the hopper 361 is fixedly connected to the feeding pipe 363 through a vertical dropping pipe 362.

[0047] With the above design, the solid scale inhibitor in the hopper 361 enters the conveying pipe 363 through the discharge pipe 362. The transmission motor 364 starts and drives the spiral blade 366 to rotate through the transmission shaft 365. The rotating spiral blade 366 pushes the scale inhibitor along the discharge pipe 362 and finally enters the switching through hole 341 from the filling port 334, thus completing the operation of adding scale inhibitor into the switching through hole 341.

[0048] The top of the silo 361 is fixedly connected to a feeding pipe 3611. A distance sensor 3612 is installed on the top of the silo 361. The feeding pipe 3611 is used to connect to the feeding device. The distance sensor 3612 detects the accumulation height of the scale inhibitor in the silo 361. After the height drops to the preset level, the feeding device adds scale inhibitor to the silo 361 through the feeding pipe 3611 to ensure that the device can continuously add scale inhibitor to the cooling coil 11 through the switching component 3.

[0049] It should be noted that the scale inhibitor stored in silo 361 is in solid powder or granular form, preferably organic phosphate, polycarboxylate, or inorganic phosphate.

[0050] Second Embodiment

[0051] like Figure 10 and Figure 11 As shown, the second embodiment of the present invention provides a water-cooled furnace cover assembly with uniform cooling. Based on the first embodiment, the difference is that the cleaning ball 4 further includes a diversion channel 43 with a spiral extension trajectory and both ends extending to its own outer surface.

[0052] Specifically, the extension trajectory of the diversion channel 43 is spiral, with its axis passing through the center of the sphere 41. With this design, the water flow within the cooling coil 11 splits into two paths as it flows from one side of the cleaning ball 4 to the other. One path passes through the gap between the sphere 41 and the inner wall of the cooling coil 11, while the other path passes through the spiral diversion channel 43. This second path flows along the spiral trajectory within the diversion channel 43, generating two forces on the sphere 41. One force pushes the sphere 41 along the cooling coil 11, while the other force pushes the sphere 41 to rotate around its own center, thereby moving the bristles outside the sphere 41. This disrupts the water film and scale on the inner wall of the cooling coil 11, enhances water flow, prevents the water film from adhering to the wall and continuously heating it, improves the cleaning effect on the cooling coil 11, ensures consistent thermal conductivity throughout the cooling coil 11, and enhances cooling uniformity.

[0053] Third Embodiment

[0054] like Figure 12 and Figure 13 As shown, a water-cooled furnace cover assembly with uniform cooling according to the third embodiment of the present invention is based on the second embodiment, except that the cleaning component 42 is a cleaning layer disposed on the sphere 41.

[0055] Specifically, the cleaning layer is a sponge layer covering the sphere 41. More specifically, the sphere 41 includes an inner core 411 and an outer sleeve 412 fixed to the inner core 411. The cleaning component 42 includes a hemispherical cleaning pad 421 facing each other. The cleaning pad 421 is a sponge pad and is fixed to the inner core 411 and the outer sleeve 412. The outer circumferential edge of the inner core 411 is provided with a spiral outer groove 431, and the inner circumferential wall of the outer sleeve 412 is provided with a spiral inner groove 432. Both cleaning pads 421 are provided with a recess 433. The outer groove 431, the inner groove 432 and the recess 433 are combined to form a spiral diversion channel 43, so that when the water flows through the diversion channel 43, it acts on the cleaning ball 4, generating a force in two directions. One direction of the force pushes the cleaning ball 4 to flow along the cooling coil 11, and the other direction drives the cleaning ball 4 to rotate.

[0056] Unlike the second embodiment, the cleaning component 42 in this embodiment is a sponge pad. Its elasticity and porous structure can increase the contact area between the cleaning ball 4 and the inner wall of the cooling coil 11. The sponge pad also facilitates water flow. This increases the cleaning area of ​​the cooling coil 11 and further improves the effect of destroying water film and scale on the inner wall of the cooling coil 11, thereby improving cooling uniformity and cooling efficiency, and ensuring the safe and stable operation of the water-cooled furnace cover assembly.

[0057] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A water-cooled furnace cover assembly with uniform cooling, characterized in that, include: The furnace cover body is provided with a furnace door, a feeding port, a flue gas port and an electrode port. The electrode port is located at the top of the furnace cover body. The furnace cover body includes several cooling coils that are coaxially aligned and sequentially sealed and connected. The two ends of the cooling coils are adjacent to each other and are respectively the water inlet and the water outlet. The two cooling components are a cooling inlet unit and a cooling outlet unit, and each includes a water pump for connecting to a cooling water source, a main pipe connected to the end of the water pump away from the cooling water source, and a branch pipe connected to the main pipe and corresponding to the cooling coil. A switching component, corresponding one-to-one with the cooling coil, is disposed between the corresponding cooling coil and the two cooling supply components. It includes a drive unit and a switching element. The switching element is provided with two switching channels with the same inner diameter as the inner diameter of the cooling coil. The drive unit drives the switching element to move and switch the positions of the two switching channels. The branch pipe of the cooling inlet unit is connected to the water inlet of the corresponding cooling coil through one of the switching channels, and the branch pipe of the cooling outlet unit is connected to the water outlet of the corresponding cooling coil through the other switching channel, so that the cooling coil and the two switching channels enclose and form a cooling pipeline. Cleaning balls are installed one-to-one within the cooling pipes. Each ball has an outer diameter smaller than the inner diameter of the cooling coil and is rigid, and a cleaning element is installed outside the ball and is elastic. The cleaning element is bristles densely distributed on the ball or a cleaning layer installed on the ball. The cleaning element abuts against the inner wall of the cooling pipe.

2. The water-cooled furnace cover assembly with uniform cooling according to claim 1, characterized in that: The cleaning ball also includes a diversion channel with a spiral trajectory extending to its own outer surface at both ends.

3. The water-cooled furnace cover assembly with uniform cooling according to claim 1, characterized in that: A water flow interceptor is provided at the end of the switching channel that is connected to the water outlet, away from the cooling coil. The water flow interceptor is used to prevent the cleaning ball from entering the branch pipe of the cooling unit and to allow water to flow through.

4. The water-cooled furnace cover assembly with uniform cooling according to claim 1, characterized in that: Both of the switching channels are equipped with water flow interceptors at the ends furthest from the cooling coil.

5. The water-cooled furnace cover assembly with uniform cooling according to any one of claims 1-3, characterized in that: The switching component includes a hollow outer shell and a switching disk that is sealed and fitted to the inner wall of the outer shell. The switching disk is a disc and has switching through holes arranged in a circular array around its own axis. The outer shell has two inlet and outlet through holes on each of its two facing sides. The driving unit drives the switching disk to rotate around its own axis, so that the switching through holes connect with the inlet and outlet through holes on both sides of the outer shell to form a switching channel while adjusting the position of the switching through holes.

6. The water-cooled furnace cover assembly with uniform cooling according to claim 5, characterized in that: The switching component also includes a detection unit, which is used to detect whether the cleaning ball passes through the water outlet.

7. The water-cooled furnace cover assembly with uniform cooling according to claim 6, characterized in that: The cooling coil has an observation port on its side wall that is coaxially aligned and adjacent to the water outlet. The observation port has an observation window. The detection unit includes a light emitter and a light receiver that are both connected to and aligned with the outer casing. The light emitter, the two observation windows, and the light receiver are arranged sequentially on the same straight line.

8. The water-cooled furnace cover assembly with uniform cooling according to claim 7, characterized in that: The detection unit also includes a sealing cylinder, which, together with the cooling coil and the outer shell, forms a sealed cavity. The emitting end of the light emitter and the receiving end of the light receiver are both located within the sealed cavity.

9. The water-cooled furnace cover assembly with uniform cooling according to claim 5, characterized in that: The outer shell is also provided with a disassembly port with an inner diameter larger than the outer diameter of the sphere. The disassembly port is detachably connected to a sealing plug. The rotation path of the switching through hole includes a disassembly station. In the disassembly station, the switching through hole is directly connected to the disassembly port.

10. The water-cooled furnace cover assembly with uniform cooling according to claim 5, characterized in that: The outer casing is also provided with a filling port. The rotation path of the switching through hole includes a filling station. At the filling station, the switching through hole is directly connected to the filling port. The filling port is connected to a filling unit, which is used to add scale inhibitor into the switching through hole through the filling port.

Images