An oil leakage-proof rolling mill nozzle

Abstract

The present application relates to rolling mill nozzle technical field, especially point to a kind of anti-leakage rolling mill nozzle, including alloy pipe, the middle part of the alloy pipe rear end is connected with solenoid valve, the inside of the alloy pipe front end is connected with the filter screen for filtering liquid, the outside of the alloy pipe front end is fixedly connected with connecting seat, both ends of the connecting seat are all set with bolt hole, the outside of the alloy pipe front end is fixedly connected with inner collection cover, by the setting of inner collection cover, when nozzle injection ends, solenoid valve is closed first, starts to unfold assembly and is unfolded to the multiple unfolded pads that inner collection cover is collected in outside, multiple unfolded pads are wrapped in the outside of nozzle, so that the solution remaining in alloy pipe will drop on unfolded pad, cannot drop to outside, and in normal nozzle injection, unfolded pad can be in half unfolded state, so the outside of injection site can also be surrounded by unfolded pad, do this can prevent nozzle from falling in the process of injection, the problem that too much solution is gathered at spout.

Description

Technical Field

[0001] This invention relates to the field of rolling mill nozzle technology, and in particular to a rolling mill nozzle that prevents oil leakage. Background Technology

[0002] A rolling mill is a piece of equipment that realizes the metal rolling process. It generally refers to the equipment that completes the entire process of rolling material production. During the operation of the rolling mill, the rolled workpiece needs to be cooled and lubricated. This is done by spraying cooling water and lubricating oil from nozzles to process the rolled workpiece.

[0003] Nozzles are a crucial component in many spraying, misting, oil spraying, sandblasting, and coating equipment. They are widely used in various industries, with materials ranging from stainless steel and plastic to silicon carbide, polytetrafluoroethylene, PP, aluminum alloy, and tungsten steel. They are commonly used in industries such as automotive, electroplating, surface treatment, high-pressure cleaning, dust removal, cooling, desulfurization, humidification, mixing, and landscaping.

[0004] Nozzles in rolling mills are generally used to cool and lubricate rolled workpieces. They need to spray liquids such as cooling water and lubricating oil. Some of these liquids cannot drip onto parts of the rolling mill. Therefore, it is necessary to prevent the remaining liquid from dripping after spraying. However, traditional nozzles often lack anti-drip function. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that some liquid from the nozzle cannot drip onto some parts in the rolling mill, while traditional nozzles often lack anti-drip function.

[0006] To solve the above-mentioned technical problems, the present invention provides a leak-proof rolling mill nozzle, comprising an alloy tube, a solenoid valve connected to the rear end of the middle of the alloy tube, a filter screen for filtering liquid connected to the front end of the alloy tube, a connecting seat fixed to the front end of the outer side of the alloy tube, bolt holes being provided at both ends of the connecting seat, an inner cover fixed to the front end of the outer side of the alloy tube, the inner cover being annularly arranged, a plurality of unfolding pads connected to the front end of the inner cover, and a plurality of unfolding components provided at the front end of the inner cover, the unfolding components being used to unfold the unfolding pads outward and wrap them around the front end of the alloy tube;

[0007] By using the inner cover, after the nozzle finishes spraying, the solenoid valve closes first, and the unfolding assembly is activated to unfold multiple unfolding pads that were gathered in the inner cover outward. The multiple unfolding pads wrap around the outside of the nozzle, so that the remaining solution in the alloy tube will drip onto the unfolding pads and not drip into the outside. When the nozzle is spraying normally, the unfolding pads can be in a semi-unfolded state, so that the outside of the spraying part can also be surrounded by the unfolding pads. This can prevent the nozzle from dripping due to too much solution accumulating at the nozzle nozzle during spraying. Through this setting, not only is the nozzle anti-drip effect achieved, but also because the unfolding pads are adjustable, the unfolding pads can be retracted to a smaller size during installation or maintenance, resulting in a smaller overall volume and not affecting other work.

[0008] In one embodiment of the present invention, two symmetrically arranged movable blocks are provided at the front end of the alloy tube. The movable blocks are semi-circular in shape, and a locking block is fixedly connected to one end of the movable block near the alloy tube. The locking block is slidably engaged with the front end of the alloy tube. Two springs are fixedly connected between the locking block and the alloy tube. A movable component is provided on the outside of the locking block. The movable component is used to drive the locking block to move. When the nozzle is in a horizontal or tilted state, some solution generally remains inside the alloy tube after spraying. If the front end of the alloy tube is normally open, a lot of liquid will leak out. By setting the movable blocks, after spraying, the movable component will drive the locking block and the movable blocks to move, so that the two movable blocks move towards the center. The movable blocks will partially block the output end of the alloy tube, so that the solution remaining in the alloy tube will not overflow and reduce the dripping of excess solution.

[0009] In one embodiment of the present invention, the unfolding assembly includes multiple supply tubes, which are circumferentially and equidistantly fixed to the surface of the inner cover. A variable tube is fixed to the end of the inner cover. Multiple unfolding pads are connected between adjacent variable tubes. The variable tube is a hollow tube made of flexible material, and multiple metal sheets are attached to its outer surface. Under normal conditions, the metal sheets are spirally coiled. Two micro air pumps are fixed to the outside of the inner cover. During normal nozzle spraying, to prevent solution from accumulating and dripping at the nozzle, the micro air pumps are activated to inject air into the supply tubes, causing the spirally coiled metal sheets and variable tubes to extend outwards a certain distance. This extension of the variable tubes causes the unfolding pads to spread outwards. During the unfolding process, it is important to ensure that the inner wall of the unfolding pads is within the alloy... The extension stops below the tube, not at the curled part, once it reaches below the alloy tube. Since some nozzles are angled, the vertically dripping liquid may extend far beyond the output end. In this case, the output effect of the micro air pump can be increased to allow the unfolding pad to unfold below the liquid dripping. If the nozzle is vertically set, it is only necessary to prevent the nozzle from continuing to drip liquid when the rolled piece is removed after spraying. In this case, one of the variable tubes needs to be replaced with a longer model, and the adjacent unfolding pad should also be a longer model. After spraying, with the maximum injection pressure of the micro air pump, all the variable tubes can be lengthened. Because one of the variable tubes is the longest, the original frustum-shaped wrapping will shift to one side, thus accepting and blocking the dripping liquid.

[0010] In one embodiment of the present invention, the front end of the inner cover is arranged in an inward buckle shape, and multiple unfolding pads are unfolded to form a frustum shape. The end of the variable tube is fixedly connected to a connecting block, and an annular surrounding tube is connected between the multiple connecting blocks. The surrounding tube is made of elastic material, and one end of the metal sheet is fixedly connected to the inner cover. The surrounding tube is designed so that when the multiple variable tubes extend outward, they are all constrained and converge toward the center instead of scattering. At the same time, when the multiple variable tubes retract, the surrounding tube can also constrain the multiple rolled-up variable tubes.

[0011] In one embodiment of the present invention, the moving component includes two symmetrically arranged rotating shafts, which are parallel to the moving block. The rotating shafts are rotatably connected to the inner wall of the alloy tube and are located between the solenoid valve and the moving block. A swing plate is fixedly connected to the outer side of the rotating shaft and is located inside the alloy tube. A steel cable is fixedly connected between the outer side of the rotating shaft and the locking block, and a torsion spring is fixedly connected between the rotating shaft and the alloy tube. When the solenoid valve is opened, the liquid flows in the alloy tube, thereby squeezing the swing plate towards the front end of the alloy tube, causing the rotating shaft to rotate and pull the steel cable, causing the locking block and the moving block to open outward. At this time, the sprayed liquid can be sprayed outward in a cone shape normally. When the solenoid valve is closed, the swing plate and the rotating shaft return to their original positions under the action of the torsion spring, while the moving block and the locking block return to their original positions under the action of the spring. This partially seals the nozzle, preventing the liquid remaining inside from overflowing excessively.

[0012] In one embodiment of the present invention, the swing plate is arranged in a semi-circular shape, and the area of ​​the two swing plates is smaller than the internal vertical cross section of the alloy tube. The swing plate is tilted towards the solenoid valve under the action of the torsion spring. The gap between the swing plate and the alloy tube allows the injection pressure to be correctly squeezed onto the swing plate, ensuring that the swing plate can move. The tilting of the swing plate allows the steel cable to be pulled more significantly when the swing plate rotates, allowing the locking block to move a larger distance.

[0013] In one embodiment of the present invention, connecting pipes are fixedly connected to the top and bottom of the inner cover. The other end of the connecting pipe passes through the connecting seat and is fixedly connected to a docking valve. The output end of the upper connecting pipe is horizontally set. After the unfolding pad receives a drop of liquid, the docking valve is opened. One docking valve is connected to an external water source, and the other is connected to an external sewage pipe. As the docking valve is opened, clean water is sprayed into the moving block through the connecting pipe. Since multiple unfolding pads are in an unfolded state at this time and form a frustum shape, the clean water at the output end of the connecting pipe will move in a circular motion along the inner wall of the inner cover and the unfolding pad, thereby rinsing the dripping solution and discharging it into the sewage pipe through the other connecting pipe and the docking valve. After rinsing, since the shrinking process of the shrinking pipe is a spiral shrinking, the residual water will only be collected inside and there will be no dripping problem.

[0014] In one embodiment of the present invention, the inner side of the surrounding tube is hollow, an offset rope is disposed inside the surrounding tube, and a tightening assembly is disposed outside the offset rope. The tightening assembly is used to pull multiple outer edges of the offset rope. In order to ensure the rinsing process is thorough and leak-free, when rinsing and wrapping the nozzle, the tightening assembly can pull the offset rope to tighten and seal the heads of multiple variable tubes. As the offset rope is pulled shorter, the surrounding tube will also tighten, so that the unfolded variable tube and the unfolded pad form a closed cone shape. In this way, no matter how much dripping and rinsing occurs, the liquid will not leak to the outside.

[0015] In one embodiment of the present invention, the convergence assembly includes a compression tube, both ends of which are fixedly connected to the change tube. The end of the compression tube near the connecting block communicates with the interior of the change tube. A smooth-surfaced movable ball is provided on the inner side of the compression tube. A tension rope is connected between the movable ball and the offset rope. To converge the offset rope, after the change tube is fully taut, the output of the micro air pump is increased to allow air pressure to enter the compression tube, thereby pushing the movable ball in the compression tube in the opposite direction, thus pulling the tension rope backward, and pulling the unstable offset rope portion into the change tube and the compression tube. This shortens the offset rope located in the surrounding tube, thereby pulling the surrounding tube shorter, thus achieving the effect of multiple change tubes merging towards the center. After cleaning, as the micro air pump is turned off, the metal sheet deforms and rolls up, squeezing out the air pressure in the change tube and the compression tube. At the same time, due to the return and unfolding of the change tube, the surrounding tube will be stretched and lengthened, thus returning to its original state. The above process can be repeated continuously.

[0016] In one embodiment of the present invention, the extrusion tube is made of an elastic material, the offset rope and the pulling rope both pass through the inner side of the connecting block, and elastic rings are connected between the two ends of the connecting block and the offset rope. The elastic rings are used for sealing to prevent water in the changing tube from entering the surrounding tube. The elastic material of the extrusion tube allows the inner wall of the extrusion tube to continuously squeeze the moving ball, and a certain pressure is required for the moving ball to move forward.

[0017] The technical solution of the present invention has the following advantages compared with the prior art:

[0018] The present invention discloses a leak-proof rolling mill nozzle. Through the design of an inner cover, after the nozzle finishes spraying, the solenoid valve closes first, and the unfolding assembly is activated to unfold multiple unfolding pads that were gathered in the inner cover outwards. These unfolding pads wrap around the outside of the nozzle, so that any remaining solution in the alloy tube drips onto the unfolding pads and does not drip to the outside. During normal spraying, the unfolding pads can be in a semi-unfolded state, so the outside of the spraying area is also surrounded by the unfolding pads. This prevents the nozzle from dripping due to excessive solution accumulation at the nozzle nozzle during spraying. This design not only achieves a leak-proof effect for the nozzle, but also, because the unfolding pads are adjustable, the overall size is small during installation or maintenance, as the unfolding pads are retracted and reduced in size, without affecting other operations.

[0019] By setting up the moving blocks, after the spraying is finished, the moving component will drive the card block and the moving blocks to move towards the center. The moving blocks will partially block the output end of the alloy tube, preventing the solution remaining in the alloy tube from overflowing and reducing the dripping of excess solution. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a cross-sectional view of the present invention;

[0023] Figure 3 This is a cross-sectional view of the front end of the alloy tube of the present invention;

[0024] Figure 4 This is a perspective view of the connecting seat and the inner cover of the present invention;

[0025] Figure 5 This is a development diagram of the development pad of the present invention;

[0026] Figure 6 This is a three-dimensional view of the arrangement plate of the present invention;

[0027] Figure 7 This is a perspective view of the variable tube and the surrounding tube of the present invention;

[0028] Figure 8 This is a cross-sectional view of the variable tube of the present invention;

[0029] Explanation of reference numerals in the instruction manual's attached drawings: 1. Alloy tube; 2. Solenoid valve; 3. Connecting seat; 4. Inner cover; 5. Deployment pad; 6. Moving block; 7. Variation tube; 8. Filter screen; 9. Rotating shaft; 10. Swing plate; 11. Connecting tube; 12. Docking valve; 13. Supply tube; 14. Miniature air pump; 16. Circulating tube; 17. Steel cable; 19. Clamping block; 20. Metal sheet; 21. Extrusion tube; 22. Offset rope; 23. Connecting block; 24. Moving ball; 25. Pulling rope. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] Reference Figures 1 to 3As shown, a leak-proof rolling mill nozzle of the present invention includes an alloy tube 1. A solenoid valve 2 is connected to the rear end of the middle of the alloy tube 1. A filter screen 8 for filtering liquid is connected to the front end of the alloy tube 1. A connecting seat 3 is fixed to the front end of the outer side of the alloy tube 1. Bolt holes are provided at both ends of the connecting seat 3. An inner cover 4 is fixed to the front end of the outer side of the alloy tube 1. The inner cover 4 is arranged in a ring shape. A plurality of unfolding pads 5 are connected to the front end of the inner cover 4. A plurality of unfolding components are provided at the front end of the inner cover 4. The unfolding components are used to unfold the unfolding pads 5 outward and wrap them around the front end of the alloy tube 1.

[0032] During operation, nozzles in the rolling mill are generally used to cool and lubricate the rolled workpiece. They need to spray liquids such as cooling water and lubricating oil. Some of these liquids cannot drip onto parts of the rolling mill. Therefore, it is necessary to prevent the remaining liquid from dripping after spraying. However, traditional nozzles often lack anti-drip function.

[0033] With the inner cover 4 in place, after the nozzle finishes spraying, the solenoid valve 2 closes first, and the unfolding assembly is activated to unfold the multiple unfolding pads 5 that were gathered in the inner cover 4 outward. The multiple unfolding pads 5 wrap around the outside of the nozzle, so that the remaining solution in the alloy tube 1 will drip onto the unfolding pads 5 and will not drip to the outside. When the nozzle is spraying normally, the unfolding pads 5 can be in a semi-unfolded state, so that the outside of the spraying part can also be surrounded by the unfolding pads 5. This can prevent the nozzle from dripping due to too much solution accumulating at the nozzle opening during spraying. Through this setting, not only is the anti-drip effect of the nozzle achieved, but also because the unfolding pads 5 have an adjustable unfolding function, the unfolding pads 5 can be retracted and reduced in size during installation or maintenance, resulting in a smaller overall volume and not affecting other work.

[0034] Reference Figures 1 to 6 As shown, the front end of the alloy tube 1 is provided with two symmetrically arranged movable blocks 6. The movable blocks 6 are semi-circular in shape. A locking block 19 is fixedly connected to one end of the movable block 6 near the alloy tube 1. The locking block 19 is slidably engaged with the front end of the alloy tube 1. Two springs are fixedly connected between the locking block 19 and the alloy tube 1. A moving component is provided on the outside of the locking block 19. The moving component is used to drive the locking block 19 to move.

[0035] During operation, when the nozzle is in a horizontal or tilted state, after spraying, there is usually some solution remaining inside the alloy tube 1. If the front end of the alloy tube 1 is normally open, a lot of liquid will leak out. With the setting of the moving block 6, after spraying, the moving component will drive the locking block 19 and the moving block 6 to move, so that the two moving blocks 6 move towards the center. The moving block 6 will partially block the output end of the alloy tube 1, so that the solution remaining in the alloy tube 1 will not overflow and reduce the dripping of excess solution.

[0036] Reference Figures 3 to 7 As shown, the unfolding assembly includes multiple supply tubes 13, which are circumferentially and equidistantly fixed to the surface of the inner cover 4. A variable tube 7 is fixed to the end of the inner cover 4, and multiple unfolding pads 5 are connected between adjacent variable tubes 7. The variable tube 7 is a hollow tube made of flexible material, and multiple metal sheets 20 are attached to the outer surface of the variable tube 7. The metal sheets 20 are spirally coiled in the normal state. Two miniature air pumps 14 are fixed to the outside of the inner cover 4.

[0037] During operation, to prevent solution from accumulating and dripping at the nozzle during normal spraying, the micro air pump 14 is activated to inject air into the supply pipe 13. This causes the spirally wound metal sheet 20 and the variable tube 7 to extend outwards a certain distance. The extension of the variable tube 7 will spread the unfolding pad 5 outwards. It is important to ensure that the inner wall of the unfolding pad 5 is below the alloy tube 1 during the unfolding process, rather than stopping the extension once the curled part reaches below the alloy tube 1. Since some nozzles are angled, the vertically dripping liquid may extend far beyond the output end. In this case, the micro air pump 14 can be increased. The output effect is such that the unfolding pad 5 unfolds below the liquid droplet. If the nozzle is set vertically, it is only necessary to prevent the nozzle from continuing to drip liquid when the rolled piece is removed after the spraying is finished. In this case, one of the variable tubes 7 needs to be replaced with a longer model, and the adjacent unfolding pad 5 also needs to be a longer model. In this way, after the spraying is finished, with the maximum injection pressure of the micro air pump 14, all the variable tubes 7 can be lengthened. Since one of the variable tubes 7 is the longest, the original frustum-shaped wrapping will be biased to one side, so that it can accept and block the dripping liquid.

[0038] Reference Figures 6 to 7 As shown, the front end of the inner cover 4 is set in an inward buckle shape, and the multiple unfolding pads 5 are unfolded to form a frustum shape. The end of the variable tube 7 is fixedly connected to a connecting block 23, and an annular surrounding tube 16 is connected between the multiple connecting blocks 23. The surrounding tube 16 is made of elastic material, and one end of the metal sheet 20 is fixedly connected to the inner cover 4.

[0039] During operation, the surrounding tube 16 is designed to ensure that when multiple variable tubes 7 extend outward, they are restrained and converge toward the center instead of scattering. At the same time, when multiple variable tubes 7 retract, the surrounding tube 16 can also restrain the multiple wound-up variable tubes 7.

[0040] Reference Figure 6As shown, the moving component includes two symmetrically arranged rotating shafts 9, and the rotating shafts 9 are parallel to the moving block 6. The rotating shafts 9 are rotatably connected to the inner wall of the alloy tube 1. The rotating shafts 9 are located between the solenoid valve 2 and the moving block 6. A swing plate 10 is fixedly connected to the outer side of the rotating shaft 9. The swing plate 10 is located on the inner side of the alloy tube 1. A steel cable 17 is fixedly connected between the outer side of the rotating shaft 9 and the locking block 19. A torsion spring is fixedly connected between the rotating shaft 9 and the alloy tube 1.

[0041] When the solenoid valve 2 is opened, the liquid flows in the alloy tube 1, which squeezes the swing plate 10 towards the front end of the alloy tube 1, causing the rotating shaft 9 to rotate and pull the steel cable 17, causing the locking block 19 and the moving block 6 to open outward. At this time, the liquid can be sprayed outward in a cone shape normally. When the solenoid valve 2 is closed, the swing plate 10 and the rotating shaft 9 return to their positions under the action of the torsion spring, while the moving block 6 and the locking block 19 return to their positions under the action of the spring. This can partially block the nozzle, preventing the liquid inside from overflowing excessively.

[0042] Reference Figure 6 As shown, the swing plate 10 is arranged in a semi-circular shape, and the area formed by the two swing plates 10 is smaller than the internal vertical cross section of the alloy tube 1. The swing plate 10 is inclined towards the solenoid valve 2 under the action of the torsion spring.

[0043] During operation, the gap between the swing plate 10 and the alloy tube 1 allows the spray pressure to be correctly squeezed onto the swing plate 10, ensuring that the swing plate 10 can move. The tilting setting of the swing plate 10 allows the steel cable 17 to be pulled more significantly when the swing plate 10 rotates, allowing the locking block 19 to move a larger distance.

[0044] Reference Figures 1 to 5 As shown, the top and bottom of the inner cover 4 are both fixed with connecting pipes 11. The other end of the connecting pipe 11 passes through the connecting seat 3 and is fixed with a docking valve 12. The output end of the connecting pipe 11 located above is horizontally set.

[0045] During operation, after the unfolding pad 5 receives one drip of liquid, the docking valve 12 is opened. One docking valve 12 is connected to an external water source, and the other is connected to an external drain pipe. As the docking valve 12 is opened, clean water is sprayed into the moving block 6 through the connecting pipe 11. Since the multiple unfolding pads 5 are in the unfolded state and form a frustum shape, the clean water at the output end of the connecting pipe 11 will move in a circular motion along the inner wall of the inner cover 4 and the unfolding pad 5, thereby rinsing off the dripping solution. The solution is then discharged into the drain pipe through the other connecting pipe 11 and the docking valve 12. After rinsing, since the shrinking process of the changing pipe 7 is a spiral shrinking, the residual water will only be collected inside and there will be no dripping problem.

[0046] Reference Figures 5 to 8As shown, the inner side of the surrounding tube 16 is hollow, the inside of the surrounding tube 16 is provided with an offset rope 22, and the outside of the offset rope 22 is provided with a gathering component, which is used to pull multiple outer edges of the offset rope 22.

[0047] During operation, in order to ensure a thorough and leak-free rinsing process, the head of multiple variable tubes 7 can be tightened and sealed by pulling the offset rope 22 during rinsing and wrapping the nozzle. As the offset rope 22 is pulled shorter, the surrounding tube 16 will also tighten, so that the unfolded variable tube 7 and the unfolding pad 5 form a closed cone shape. In this way, no matter how much it drips and rinses, the liquid will not leak to the outside.

[0048] Reference Figures 5 to 8 As shown, the convergence assembly includes a compression tube 21, both ends of which are fixed to the variable tube 7. One end of the compression tube 21 near the connecting block 23 is connected to the interior of the variable tube 7. A smooth-surfaced movable ball 24 is provided on the inner side of the compression tube 21. A pulling rope 25 is connected between the movable ball 24 and the offset rope 22.

[0049] During operation, to tighten the offset rope 22, after the change tube 7 is fully taut, the output of the micro air pump 14 is increased to allow air pressure to enter the extrusion tube 21. This pushes the moving ball 24 in the extrusion tube 21 in the opposite direction, thereby pulling the pulling rope 25 backward. This pulls the unstable offset rope 22 into the change tube 7 and the extrusion tube 21, thus shortening the offset rope 22 located in the encircling tube 16, thereby shortening the encircling tube 16 and achieving the effect of merging multiple change tubes 7 towards the center. After cleaning, as the micro air pump 14 is turned off, the metal sheet 20 deforms and retracts, squeezing out the air pressure in the change tube 7 and the extrusion tube 21. At the same time, due to the return and unfolding of the change tube 7, the encircling tube 16 is stretched and lengthened, thus returning to its original state. The above process can be repeated continuously.

[0050] Reference Figures 5 to 8 As shown, the extrusion tube 21 is made of elastic material. The offset rope 22 and the pulling rope 25 both pass through the inner side of the connecting block 23. The two ends of the connecting block 23 are connected to the offset rope 22 by elastic rings. During operation, the elastic rings are used for sealing to prevent water in the change tube 7 from entering the surrounding tube 16. The elastic material of the extrusion tube 21 allows the inner wall of the extrusion tube 21 to continuously squeeze the moving ball 24. A certain pressure is required for the moving ball 24 to move forward.

[0051] During operation, thanks to the inner cover 4, after the nozzle finishes spraying, the solenoid valve 2 closes first, and the unfolding assembly is activated to unfold the multiple unfolding pads 5 that were gathered in the inner cover 4 outward. The multiple unfolding pads 5 wrap around the outside of the nozzle, so that the remaining solution in the alloy tube 1 will drip onto the unfolding pads 5 and will not drip to the outside. When the nozzle is spraying normally, the unfolding pads 5 can be in a semi-unfolded state, so that the outside of the spraying part can also be surrounded by the unfolding pads 5. This can prevent the nozzle from dripping due to too much solution accumulating at the nozzle during spraying. Through this setting, not only is the anti-drip effect of the nozzle achieved, but also because of the adjustable unfolding function of the unfolding pads 5, the unfolding pads 5 can be retracted to a smaller size during installation or maintenance, resulting in a smaller overall volume and not affecting other work.

[0052] When the nozzle is in a horizontal or tilted state, after spraying, there is usually some solution inside the alloy tube 1. If the front end of the alloy tube 1 is normally open, a lot of liquid will leak out. With the setting of the moving block 6, after spraying, the moving component will drive the locking block 19 and the moving block 6 to move, so that the two moving blocks 6 move towards the center. The moving block 6 will partially block the output end of the alloy tube 1, so that the solution remaining in the alloy tube 1 will not overflow and reduce the dripping of excess solution.

[0053] During normal nozzle spraying, to prevent solution from accumulating and dripping at the nozzle, the micro air pump 14 is activated to inject air into the supply pipe 13, causing the originally spirally wound metal sheet 20 and the variable tube 7 to extend outward a certain distance. The extension of the variable tube 7 will spread the unfolding pad 5 outward. During the unfolding process, it is important to ensure that the inner wall of the unfolding pad 5 is below the alloy tube 1, rather than stopping the extension once the curled part reaches below the alloy tube 1. Since some nozzles are angled, the vertically dripping liquid may extend far beyond the output end. In this case, the output of the micro air pump 14 can be increased. To achieve the desired effect, the unfolding pad 5 should be unfolded to the point where the liquid drips. If the nozzle is set vertically, it is only necessary to prevent the nozzle from continuing to drip liquid when the rolled piece is removed after the spraying is finished. In this case, one of the variable tubes 7 needs to be replaced with a longer model, and the adjacent unfolding pad 5 should also be a longer model. After the spraying is finished, with the maximum injection pressure of the micro air pump 14, all the variable tubes 7 can be lengthened. Since one of the variable tubes 7 is the longest, the original frustum-shaped wrapping will be biased to one side, thus accepting and blocking the dripping liquid.

[0054] The purpose of the surrounding tube 16 is to ensure that when the multiple variable tubes 7 extend outward, they are bound together and converge towards the center instead of scattering. At the same time, when the multiple variable tubes 7 retract, the surrounding tube 16 can also bind the multiple wound-up variable tubes 7.

[0055] When the solenoid valve 2 is opened, the liquid will flow in the alloy tube 1, thereby squeezing the swing plate 10 towards the front end of the alloy tube 1, causing the rotating shaft 9 to rotate and pull the steel cable 17, causing the locking block 19 and the moving block 6 to open outward. At this time, the sprayed liquid can be sprayed outward in a cone shape normally. When the solenoid valve 2 is closed, the swing plate 10 and the rotating shaft 9 return to their positions under the action of the torsion spring, while the moving block 6 and the locking block 19 return to their positions under the action of the spring. This can partially block the nozzle, preventing the liquid inside from overflowing excessively.

[0056] The gap between the swing plate 10 and the alloy tube 1 allows the injection pressure to be correctly squeezed onto the swing plate 10, ensuring that the swing plate 10 can move. The tilting setting of the swing plate 10 allows the steel cable 17 to be pulled more significantly when the swing plate 10 rotates, allowing the locking block 19 to move a larger distance.

[0057] After the unfolding pad 5 receives a drop of liquid, the docking valve 12 is opened. One docking valve 12 is connected to an external water source, and the other is connected to an external drain pipe. As the docking valve 12 is opened, clean water is sprayed into the moving block 6 through the connecting pipe 11. Since the multiple unfolding pads 5 are in the unfolded state and form a frustum, the clean water at the output end of the connecting pipe 11 will move in a circular motion along the inner wall of the inner cover 4 and the unfolding pad 5, thereby rinsing the dripping solution. The solution is then discharged into the drain pipe through the other connecting pipe 11 and the docking valve 12. After rinsing, since the shrinking process of the changing pipe 7 is a spiral shrinking, the residual water will only be collected inside and there will be no dripping problem.

[0058] To ensure a thorough and leak-free rinsing process, the head of multiple variable tubes 7 can be tightened and sealed by pulling the offset rope 22 during rinsing and wrapping the nozzle. As the offset rope 22 is pulled shorter, the surrounding tube 16 will also tighten, so that the unfolded variable tube 7 and the unfolding pad 5 form a closed cone shape. In this way, no matter how much it drips and rinses, the liquid will not leak to the outside.

[0059] To tighten the offset rope 22, after the change tube 7 is fully taut, the output of the micro air pump 14 is increased to allow air pressure to enter the extrusion tube 21. This pushes the moving ball 24 in the extrusion tube 21 in the opposite direction, pulling the pulling rope 25 backward. This pulls the unstable offset rope 22 into the change tube 7 and the extrusion tube 21, shortening the offset rope 22 in the encircling tube 16. This shortens the encircling tube 16, thus merging multiple change tubes 7 towards the center. After cleaning, as the micro air pump 14 is turned off, the metal sheet 20 deforms and retracts, squeezing out the air pressure in the change tube 7 and the extrusion tube 21. At the same time, as the change tube 7 unfolds, the encircling tube 16 is stretched and lengthened, returning to its original state. This process can be repeated continuously.

[0060] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A leak-proof rolling mill nozzle, characterized in that: The system includes an alloy tube (1), a solenoid valve (2) connected to the rear end of the middle part of the alloy tube (1), a filter screen (8) for filtering liquid connected to the front end of the interior of the alloy tube (1), a connecting seat (3) fixed to the front end of the outer side of the alloy tube (1), bolt holes being provided at both ends of the connecting seat (3), an inner cover (4) fixed to the front end of the outer side of the alloy tube (1), the inner cover (4) being arranged in a ring shape, a plurality of unfolding pads (5) connected to the front end of the inner cover (4), a plurality of unfolding components being provided at the front end of the inner cover (4), the unfolding components being used to unfold the unfolding pads (5) outward and wrap them around the front end of the alloy tube (1); The unfolding assembly includes multiple supply tubes (13), which are circumferentially and equidistantly fixed to the surface of the inner cover (4). The end of the inner cover (4) is fixed with a variable tube (7), and multiple unfolding pads (5) are connected between adjacent variable tubes (7). The variable tube (7) is a hollow tube made of flexible material. Multiple metal sheets (20) are attached to the outer surface of the variable tube (7). The metal sheets (20) are spirally coiled in the normal state. Two miniature air pumps (14) are fixed to the outside of the inner cover (4). The inner cover (4) is set in an inward buckle shape at the front end. Multiple unfolding pads (5) are unfolded to form a frustum shape. The end of the variable tube (7) is fixed with a connecting block (23). A ring-shaped surrounding tube (16) is connected between the multiple connecting blocks (23). The surrounding tube (16) is made of elastic material. One end of the metal sheet (20) is fixed with the inner cover (4).

2. The oil-leakage-proof rolling mill nozzle according to claim 1, characterized in that: The front end of the alloy tube (1) is provided with two symmetrically arranged movable blocks (6). The movable blocks (6) are semi-circular in shape. A locking block (19) is fixed to one end of the movable block (6) near the alloy tube (1). The locking block (19) is slidably locked to the front end of the alloy tube (1). Two springs are fixed between the locking block (19) and the alloy tube (1). A moving component is provided on the outside of the locking block (19). The moving component is used to drive the locking block (19) to move.

3. A leak-proof rolling mill nozzle according to claim 2, characterized in that: The moving component includes two symmetrically arranged rotating shafts (9), and the rotating shafts (9) are arranged parallel to the moving block (6). The rotating shafts (9) are rotatably connected to the inner wall of the alloy tube (1). The rotating shafts (9) are located between the solenoid valve (2) and the moving block (6). A swing plate (10) is fixedly connected to the outer side of the rotating shafts (9). The swing plate (10) is located on the inner side of the alloy tube (1). A steel cable (17) is fixedly connected between the outer side of the rotating shafts (9) and the locking block (19). A torsion spring is fixedly connected between the rotating shafts (9) and the alloy tube (1).

4. A leak-proof rolling mill nozzle according to claim 3, characterized in that: The swing plate (10) is arranged in a semi-circular shape. The area formed by the two swing plates (10) is smaller than the internal vertical cross section of the alloy tube (1). The swing plate (10) is inclined towards the solenoid valve (2) under the action of the torsion spring.

5. A leak-proof rolling mill nozzle according to claim 4, characterized in that: The top and bottom of the inner cover (4) are both fixed with connecting pipes (11). The other end of the connecting pipe (11) passes through the connecting seat (3) and is fixed with a docking valve (12). The output end of the upper connecting pipe (11) is set horizontally.

6. A leak-proof rolling mill nozzle according to claim 5, characterized in that: The inner side of the surrounding tube (16) is hollow, and an offset rope (22) is provided inside the surrounding tube (16). A gathering component is provided on the outer side of the offset rope (22), and the gathering component is used to pull multiple outer edges of the offset rope (22).

7. A leak-proof rolling mill nozzle according to claim 6, characterized in that: The convergence assembly includes a compression tube (21), both ends of which are fixed to the variable tube (7). One end of the compression tube (21) near the connecting block (23) is connected to the interior of the variable tube (7). A smooth-surfaced moving ball (24) is provided on the inner side of the compression tube (21). A pulling rope (25) is connected between the moving ball (24) and the offset rope (22).

8. A leak-proof rolling mill nozzle according to claim 7, characterized in that: The extrusion tube (21) is made of elastic material. The offset rope (22) and the pulling rope (25) both pass through the inside of the connecting block (23). The two ends of the connecting block (23) are connected to the offset rope (22) by elastic rings.

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