Tread breaking mechanism and method

Abstract

The application discloses a kind of tread breaking mechanism and tread breaking method, for improving the efficiency of broken tire.The tread breaking mechanism of the embodiment of the application includes frame, tire breaking area and at least two water knives, wherein the water knife is arranged on the frame, and the water knife includes water jet port.Different water knives are arranged at intervals, and the water knives are arranged around the tire breaking area.In this way, different water knives do not affect each other.The tire breaking area is used to accommodate the tire to be broken, and the water knife is used to spray water flow to the target tread area on the rotating tire through the water jet port to break the tire.The target tread area is the tread area obtained by dividing the tread of the tire in the longitudinal direction, and different water knives are used to break different target tread areas, so that each water knife has a corresponding target tread area.Different water knives break different target tread areas, and the cooperation of at least two water knives improves the efficiency of breaking the tire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire processing, in particular to a tread breaking mechanism and a tread breaking method. BACKGROUND

[0002] In order to facilitate the recycling of tires, it is necessary to break the tires. With the development of industry, a large number of waste tires are produced. The increasing waste tires not only occupy space resources, but also easily cause environmental pollution. Therefore, the recycling of waste tires has very important significance for the sustainable development of industry. In order to recycle tires, the tires need to be broken into rubber powder. The existing methods for breaking tires mainly include chemical method, mechanical method and water jet method.

[0003] In the water jet method, the tread of the tire is impacted by the water flow, so that the tire becomes rubber powder, so as to realize the breaking of the tire. The existing method is to spray water flow to the tire by a water jet cutter, so as to realize the breaking of the tire. Such a method often has low efficiency, resulting in a long time for breaking the tire. SUMMARY

[0004] The purpose of the present application is to provide a tread breaking mechanism and a tread breaking method for improving the efficiency of breaking tires.

[0005] To achieve this purpose, the embodiments of the present application adopt the following technical solutions:

[0006] A tread breaking mechanism, comprising a rack, a tire breaking area, and at least two water jet cutters;

[0007] The water jet cutter is arranged on the rack, and the water jet cutter comprises a water jet nozzle;

[0008] Different water jet cutters are arranged at intervals, and the water jet cutters are arranged around the tire breaking area, and the tire breaking area is used for accommodating the tire to be broken;

[0009] The water jet cutter is used for spraying water flow to the target tread area on the rotating tire through the water jet nozzle, so as to break the tire;

[0010] The target tread area is a tread area obtained by dividing the tread of the tire in the longitudinal direction, and different water jet cutters are used to break different target tread areas.

[0011] Optionally, the water flow sprayed by the water jet cutter and the tread broken by the water flow form a preset included angle;

[0012] The distance between the water jet nozzle of the water jet cutter and the tread broken by the water flow is a preset distance.

[0013] Optionally, the preset included angle is 90 degrees;

[0014] The preset interval is 3.5 mm.

[0015] Optionally, the width of the target tread area and the thickness of the target tread area are in inverse proportion.

[0016] Optionally, the water knives are opposite to the tread of the upper half of the tire.

[0017] Optionally, the number of the water knives is five.

[0018] The five water knives are arranged equidistantly around the tread of the tire within a range of 180 degrees.

[0019] Optionally, from one side of the tire to the other side, the tread of the tire is divided into a first target tread area, a second target tread area, a third target tread area, a fourth target tread area and a fifth target tread area.

[0020] The width of the first target tread area and the width of the fifth target tread area are smaller than the width of the second target tread area, the width of the third target tread area and the width of the fourth target tread area.

[0021] The width of the first target tread area and the width of the fifth target tread area are equal.

[0022] The width of the second target tread area, the width of the third target tread area and the width of the fourth target tread area are equal.

[0023] The tire is a waste tire.

[0024] Optionally, the tread breaking mechanism further comprises a clamp device and a water knife mounting rack.

[0025] The clamp device is used to support the inner ring of the tire and rotate the tire.

[0026] The water knives are mounted on the water knife mounting rack, and the water knife mounting rack is arranged on the rack.

[0027] The water knife mounting rack is used to control the movement of the water knives along the width direction of the target tread area.

[0028] To achieve this purpose, the embodiments of the present application also adopt the following technical solutions:

[0029] A tread breaking method is applied to the above-mentioned tread breaking mechanism.

[0030] The tread breaking method comprises:

[0031] Rotating the tire.

[0032] spraying water flow through the water jet of the water cutter to the target tread area on the rotating tire to break the tire.

[0033] Optionally, the tread breaking mechanism further comprises a clamp device and a water cutter mounting rack;

[0034] The clamp device is used to support the inner ring of the tire, and the water cutter is mounted on the water cutter mounting rack, and the water cutter mounting rack is arranged on the rack;

[0035] The rotating tire comprises:

[0036] Rotating the tire through the clamp device;

[0037] The spraying water flow through the water jet of the water cutter to the target tread area on the rotating tire comprises:

[0038] Spraying water flow through the water jet of the water cutter located at the first position to the target tread area on the rotating tire;

[0039] When the tire rotates one circle, the water cutter is controlled to move to the second position along the width direction of the target tread area through the water cutter mounting rack.

[0040] The beneficial effects of the present application are:

[0041] The tread breaking mechanism of the embodiment of the present application comprises a rack, a tire breaking area, and at least two water cutters. The water cutter is arranged on the rack, and the water cutter comprises a water jet. Different water cutters are arranged at intervals, and the water cutters are arranged around the tire breaking area. In this way, different water cutters do not affect each other. The tire breaking area is used to accommodate the tire to be broken, and the water cutter is used to spray water flow through the water jet to the target tread area on the rotating tire to break the tire. Since the target tread area is a tread area obtained by dividing the tread of the tire in the longitudinal direction, different water cutters are used to break different target tread areas, so that each water cutter has a corresponding target tread area, different water cutters break different target tread areas, and the cooperation of at least two water cutters improves the efficiency of breaking the tire. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0043] Figure 1 A structure schematic view of a tread breaking mechanism provided by the embodiment of the present application;

[0044] Figure 2 A schematic diagram of the water jet arrangement provided by an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the division of the tread of a tire provided by an embodiment of the present application;

[0046] Figure 4 A flow chart of a tread breaking method provided by an embodiment of the present application.

[0047] In the drawings:

[0048] 1. frame; 2. tire breaking area; 3. water jet; 4. water jet outlet; 5. clamp device; 6. water jet mounting frame; 7. tire; 8. first target tread area; 9. second target tread area; 10. third target tread area; 11. fourth target tread area; 12. fifth target tread area. DETAILED DESCRIPTION

[0049] An embodiment of the present application provides a tread breaking mechanism and a tread breaking method for improving the efficiency of breaking tires.

[0050] To make the inventive objects, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0051] The technical solutions of the present application will be further described below by specific embodiments with reference to the drawings.

[0052] Figure 1 A structural schematic diagram of a tread breaking mechanism provided by an embodiment of the present application, Figure 2 A schematic diagram of the water jet 3 arrangement provided by an embodiment of the present application. Among them, Figure 1 The water jet arrangement in Figure 2 is different from the water jet arrangement in

[0053] Referring to Figure 1 and Figure 2 , the tread breaking mechanism of the embodiment of the present application comprises a frame 1, a tire breaking area 2, and at least two water jets 3.

[0054] Among them, the water jet 3 is arranged on the frame 1, and the water jet 3 comprises a water jet outlet 4. The water jet outlet 4 of the water jet 3 can spray water flow.

[0055] The different water knives 3 are arranged at intervals, and the water knives 3 are arranged around the tire breaking area 2. Specifically, each water knife 3 of the tread breaking mechanism is arranged around the outside of the tire breaking area 2 in sequence. In this way, the different water knives 3 do not affect each other and can work independently.

[0056] In the embodiment of the present application, the rack 1 can be a box structure or a frame structure, and the present application does not make specific limitations on this. For example, in the example shown in the figure, the rack 1 is a box structure, and the water knives 3 and the tire breaking area 2 are located in the cavity of the rack 1. Figure 1

[0057] The tire breaking area 2 is used to accommodate the tire 7 to be broken. In other words, the tire breaking area 2 is a space area, and after the tire 7 is placed in the space area, the tire 7 can be broken.

[0058] The water knife 3 is used to spray water flow to the target tread area on the rotating tire 7 through the water jet 4 to break the tire 7.

[0059] The breaking principle of the water knife 3 of the embodiment of the present application is that the water jet 4 of the water knife 3 sprays water flow, which can be super-high pressure water flow. The impact kinetic energy of the water flow cuts the rubber part of the tire 7, and by adjusting the pressure of the water, the cutting energy of the water flow can only break the rubber on the tire 7, so that the rubber becomes fine rubber powder, without damaging the steel wire in the tire 7. This process cuts the rubber part of the tire 7 into rubber powder by the water jet, and the steel wire of the tire 7 is kept intact, so that the rubber and the steel wire of the tire 7 are separated at high speed with minimum energy, and the separated rubber generates industrial rubber powder that can be recycled and reused.

[0060] As shown in the figure, the target tread area is a tread area obtained by dividing the tread of the tire 7 in the longitudinal direction. The longitudinal direction is the direction around the tread of the tire 7. Different water knives 3 are used to break different target tread areas. Since the tread breaking mechanism includes at least two water knives 3, the number of target tread areas is at least two, and one water knife 3 breaks one target tread area. When breaking the tire 7, multiple water knives 3 work simultaneously to break the tread of the tire 7, which can improve the efficiency of breaking the tire 7. Figure 3 Since the target tread area is a tread area obtained by dividing the tread of the tire 7 in the longitudinal direction, the target tread area extends in the longitudinal direction of the tread of the tire 7. When breaking the tire 7, the tire 7 is rotated, so that the water knife 3 can gradually break the area of the target tread area, which facilitates the breaking operation of the water knife 3.

[0061] In the embodiment of the present application, the two side edges of each target tread area can be non-parallel or parallel. In the example shown in the figure, the two side edges of each target tread area are non-parallel.

[0062] Figure 3 ​​In the shown example, the two side edges of the target tread area extend in parallel, so that the interface between different target tread areas is more regular, and the edge area of the target tread area can be broken by the water jet 3.

[0063] When breaking the tire 7, the tire 7 needs to be rotated to break the tire 7 completely. The tire 7 is rotated around the center. The tire 7 can be rotated in various ways, for example, the tire 7 is clamped by a mechanism on both sides, and then the tire 7 is driven to rotate by the mechanism.

[0064] In a specific implementation, as shown in the figure, Figure 2 The tire breaking mechanism further comprises a clamp device 5. The clamp device 5 is used to support the inner ring of the tire 7 and rotate the tire 7. Specifically, the clamp device 5 is a rotatable structure, and one end of the clamp device 5 can be sleeved into the inner ring of the tire 7. When the one end of the clamp device 5 supports the inner ring of the tire 7, the rotation of the clamp device 5 can drive the tire 7 to rotate. For example, the clamp device 5 comprises a motor and a rotating shaft, the output shaft of the motor is fixedly connected with one end of the rotating shaft, and the other end of the rotating shaft is used to sleeve with the inner ring of the tire 7. The end of the rotating shaft used to sleeve with the inner ring of the tire 7 can be provided with a telescopic part, which can be clamped with the inner ring of the tire 7, so as to stably fix the tire 7.

[0065] In the embodiment of the present application, the water jet 3 is arranged on the rack 1. For example, the water jet 3 is directly mounted on the rack 1.

[0066] In a specific implementation, as shown in the figure, Figure 1 The tire breaking mechanism further comprises a water jet mounting rack 6. The water jet 3 is mounted on the water jet mounting rack 6, and the water jet mounting rack 6 is arranged on the rack 1. In this way, the water jet 3 is arranged on the rack 1 through the water jet mounting rack 6, so as to facilitate the disassembly and assembly of the water jet 3.

[0067] The water jet mounting rack 6 is used to control the movement of the water jet 3 along the width direction of the target tread area. In this way, when the target tread area is wide, the area in the width direction of the target tread area cannot be broken by the water jet 3 at one time, and the water jet 3 can be controlled to move along the width direction of the target tread area by the water jet mounting rack 6, so as to gradually break the target tread area.

[0068] For example, when the water jet 3 breaks the tire 7, after the tire 7 is rotated for one turn, the water jet 3 breaks part of the target tread area, and then the water jet mounting rack 6 controls the water jet 3 to move a preset breaking distance along the width direction of the target tread area, and continues to break the target tread area.

[0069] Optionally, as shown in the figure, Figure 1As shown, the water jet 3 and the upper half of the tire 7 are opposite each other on the tread. This arrangement places the water jet 3 in the upper half of the tire 7. The tire 7 is broken up by the water jet 3's nozzle 4 spraying water onto the tire 7, and the impact of the water jet breaks the tire 7 into rubber powder. The fact that the water jet 3 and the upper half of the tire 7 are opposite each other prevents the water jet 3 from obstructing the fall of the water and rubber powder after breaking the tire 7, allowing the rubber powder and water to fall smoothly down in the tread breaking mechanism, thus facilitating the collection of the water and rubber powder after breaking the tire 7.

[0070] To stably crush the tire 7, optionally, the water jet 3 sprays water at a preset angle to the tire tread at the point where the water jet is crushing, and the distance between the water jet nozzle 4 of the water jet 3 and the tire tread at the point where the water jet is crushing is a preset distance. For example, the preset angle is 90 degrees and the preset distance is 3.5 mm. Each water jet 3 has the same preset angle and preset distance relative to the tire 7. In practice, when the preset angle is 90 degrees and the preset distance is 3.5 mm, the water jet 3 has a higher crushing efficiency on the tire 7.

[0071] To ensure that different water jets 3 have the same or similar breaking time for the target tread area, optionally, the width and thickness of the target tread area are inversely proportional.

[0072] The wider the target tread area, the longer the required crushing time; the thicker the target tread area, the longer the required crushing time. Therefore, the width and thickness of the target tread area are inversely proportional. This balances the impact of the target tread area's width and thickness on the crushing time, balancing the crushing time required by the water jet 3 for different target tread areas. This ensures that different water jets 3 have similar or identical crushing times for the target tread areas, thereby improving the overall crushing efficiency of the tire 7 and reducing the time required to crush the entire tire 7.

[0073] In this embodiment of the invention, the number of water jets 3 is at least two, such as two, three, four, etc., and this embodiment of the invention does not make a specific limitation.

[0074] For example, such as Figure 2 As shown, there are five water jets 3. In the specific implementation, the five water jets 3 are arranged at equal intervals within a 180-degree range around the tread of the tire 7. At this time, the water jets 3 and the upper half of the tire tread are facing each other. This arrangement can minimize the mutual interference between different water jets 3 and facilitate the installation of the water jets 3.

[0075] Since different water knives 3 are used to break different target tread areas, when the number of water knives 3 is five, the number of target tread areas is five. In a specific example, from one side of the tire 7 to the other side, the tread of the tire 7 is divided into a first target tread area 8, a second target tread area 9, a third target tread area 10, a fourth target tread area 11, and a fifth target tread area 12.

[0076] The width of the first target tread area 8 and the width of the fifth target tread area 12 are less than the width of the second target tread area 9, the width of the third target tread area 10, and the width of the fourth target tread area 11. The width of the first target tread area 8 and the width of the fifth target tread area 12 are equal. The width of the second target tread area 9, the width of the third target tread area 10, and the width of the fourth target tread area 11 are equal. For example, the proportions of the first target tread area 8, the second target tread area 9, the third target tread area 10, the fourth target tread area 11, and the fifth target tread area 12 are 7:12:12:12:7 in turn.

[0077] Wherein the tire 7 is a waste tire. A common feature of waste tires is that the middle region of the tread is thinner, and the two end regions are thicker. Therefore, the breaking time required for the two end regions is greater than that required for the middle region. In this example, the adjustment of the breaking time required for the target tread area can be achieved by changing the width of the target tread area.

[0078] The first target tread area 8 and the fifth target tread area 12 are in the two end regions of the tread of the tire 7, and the second target tread area 9, the third target tread area 10, and the fourth target tread area 11 are in the middle region of the tread of the tire 7. By setting the width of the first target tread area 8 and the width of the fifth target tread area 12 to be less than the width of the second target tread area 9, the width of the third target tread area 10, and the width of the fourth target tread area 11, the breaking time of each target tread area by the five water knives 3 can be the same or close, thereby improving the breaking efficiency of the entire tire 7.

[0079] In summary, the tire breaking mechanism of the embodiment of the present application comprises a rack 1, a tire breaking area 2, and at least two water jets 3. The water jets 3 are arranged on the rack 1, and each water jet 3 comprises a water jet nozzle 4. The different water jets 3 are arranged at intervals, and the water jets 3 are arranged around the tire breaking area 2. In this way, the different water jets 3 do not affect each other. The tire breaking area 2 is used to accommodate the tire 7 to be broken, and the water jets 3 are used to spray water flow to the target tire surface area on the rotating tire 7 through the water jet nozzles 4 to break the tire 7. Since the target tire surface area is a tire surface area divided along the longitudinal direction of the tire 7, the different water jets 3 are used to break different target tire surface areas, so that each water jet 3 has a corresponding target tire surface area, and the different water jets 3 break different target tire surface areas. Through the cooperation of the at least two water jets 3, the efficiency of breaking the tire 7 is improved.

[0080] Figure 4 A flowchart of a tire breaking method provided by the embodiment of the present application is shown. Figure 4 The tire breaking method shown can be applied to the tire breaking mechanism of the above-mentioned embodiment.

[0081] Referring to Figure 4 The tire breaking method of the embodiment of the present application is applied to the tire breaking mechanism described in the above-mentioned embodiment.

[0082] The tire breaking method of the embodiment of the present application comprises:

[0083] Step 401: rotating the tire.

[0084] The tire 7 is a tire to be broken and is placed in the tire breaking area 2. The tire breaking area 2 is used to accommodate the tire 7 to be broken.

[0085] For example, the tire 7 is moved to a breaking station so that the tire 7 is placed in the tire breaking area 2. Then, the tire 7 is rotated so that the tire 7 rotates around its central axis.

[0086] The tire 7 is rotated, i.e., the tire 7 is caused to rotate around its central axis.

[0087] Step 402: spraying water flow to the target tire surface area on the rotating tire through the water jet nozzle of the water jet to break the tire.

[0088] The water jets 3 are arranged on the rack 1, and each water jet 3 comprises a water jet nozzle 4. The different water jets 3 are arranged at intervals, and the water jets 3 are arranged around the tire breaking area 2. Specifically, the water jets 3 of the tire breaking mechanism are arranged around the outside of the tire breaking area 2 in sequence.

[0089] The water jet 4 of the water jet 3 sprays the water flow to the rotating tire 7 on the tire breaking area 2, and specifically, the water jet 3 sprays the water flow to the target tread area on the tire 7. Different water jets 3 break different target tread areas. Since the target tread area is the tread area divided along the longitudinal direction of the tire 7, multiple water jets 3 break different areas of the tread of the tire 7, thereby improving the breaking efficiency.

[0090] Optionally, the tread breaking mechanism further comprises a clamp device 5 and a water jet mounting rack 6. The clamp device 5 is used to support the inner ring of the tire 7, and the water jet 3 is mounted on the water jet mounting rack 6, which is arranged on the rack 1. For specific implementation, please refer to the detailed description above.

[0091] The step 401 specifically comprises: rotating the tire 7 by the clamp device 5.

[0092] The step 402 specifically comprises: spraying the water flow to the target tread area on the rotating tire 7 by the water jet 4 of the water jet 3 at the first position. After the tire 7 rotates one circle, the water jet 3 is controlled by the water jet mounting rack 6 to move to the second position along the width direction of the target tread area. In this way, each water jet 3 can gradually break the target tread area, thereby breaking the target tread area with a larger width.

[0093] The clamp device 5 supports the inner ring of the tire 7, so that the rotation of the clamp device 5 can drive the rotation of the tire 7.

[0094] In the specific breaking process, the water jet 3 is at a position to spray the water flow to the target tread area for breaking, and at this time, the tire 7 is maintained to rotate. After the tire 7 rotates one circle, a part of the target tread area is broken, the water jet mounting rack 6 controls the water jet 3 to move a preset breaking distance along the width direction of the target tread area, so that the water jet 3 is located at another position, and the breaking of the remaining area of the target tread area is continued, thereby gradually completing the breaking process of the target tread area.

[0095] In the embodiment of the present application, by reasonably dividing the tread of the tire 7 and designing the preset angle and the preset distance of the water jet 3 relative to the tread of the tire 7, the best efficiency of the water jet 3 in cracking the tire 7 can be achieved, and the production efficiency is improved. At the same time, such a layout is conducive to the subsequent realization of the automatic operation of the overall equipment.

[0096] In summary, the tire breaking method is applied to the tire breaking mechanism in the above embodiment. The tire breaking method comprises: rotating the tire 7; and spraying water flow to a target tire area on the rotating tire 7 through the water jet 4 of the water jet 3 to break the tire 7. Since the target tire area is a tire area divided along the longitudinal direction of the tire 7, different water jets 3 are used to break different target tire areas, so that each water jet 3 has a corresponding target tire area, different water jets 3 break different target tire areas, and the cooperation of at least two water jets 3 improves the efficiency of breaking the tire 7.

[0097] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features. The modifications or replacements do not change the essence of the corresponding technical solutions, and are within the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tread breaking mechanism characterized by, The tire breaking mechanism comprises a rack, a tire breaking area, a clamp device, a water jet installation rack and at least two water jets. The clamp device is used to support the inner ring of the tire and rotate the tire. The water jet is installed on the water jet installation rack, and the water jet comprises a water jet nozzle. The water jet installation rack is arranged on the rack, and the water jet installation rack is used to control the water jet to move along the width direction of the target tread area. Different water jets are arranged at intervals, and the water jets are arranged around the tire breaking area for accommodating the tire to be broken. The water jet is used to spray water flow to the target tread area on the rotating tire through the water jet nozzle to break the tire. The target tread area is a tread area divided along the longitudinal direction of the tire, and the width of the target tread area and the thickness of the target tread area are in inverse proportion. The water jets correspond to the target tread areas respectively, and different water jets are used to break different target tread areas. The number of water jets is five. The five water jets are arranged around the tread of the tire at equal intervals within a range of 180 degrees. From one side of the tire to the other side, the tread of the tire is divided into a first target tread area, a second target tread area, a third target tread area, a fourth target tread area and a fifth target tread area. The width of the first target tread area and the width of the fifth target tread area are smaller than the width of the second target tread area, the width of the third target tread area and the width of the fourth target tread area. The width of the first target tread area and the width of the fifth target tread area are equal. The width of the second target tread area, the width of the third target tread area and the width of the fourth target tread area are equal. The tire is a waste tire.

2. The tread breaking mechanism according to claim 1, wherein The water flow sprayed by the water jet and the tread broken by the water flow form a preset included angle. The distance between the water jet nozzle of the water jet and the tread broken by the water flow is a preset distance.

3. The tread breaking mechanism according to claim 2, wherein The preset included angle is 90 degrees. The preset distance is 3.5 mm.

4. The tread breaking mechanism according to claim 1, wherein The water jet is opposite to the upper half of the tread of the tire.

5. A method of tread breaking, characterized by, The tread breaking method is applied to the tread breaking mechanism of any one of claims 1-4. The tread breaking method comprises: Rotating the tire; Spraying water flow to the target tread area on the rotating tire through the water jet nozzle of the water jet to break the tire.

6. The tread breaking method according to claim 5, wherein The clamp device is used to support the inner ring of the tire, the water jet is installed on the water jet installation rack, and the water jet installation rack is arranged on the rack; The rotating of the tire comprises: Rotating the tire by the clamp device; The spraying of water flow to the target tread area on the rotating tire by the water jet nozzle of the water jet comprises: spraying a water flow to a target tread area on the rotating tire through a water outlet of the water jet located at a first position; controlling the water jet to move to a second position along a width direction of the target tread area through the water jet mounting frame after the tire rotates one round.

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