Water sprinkling system and road milling machine

Abstract

The application provides a watering system and a road milling machine. The watering system comprises a water supply part, a conveying part, a watering part, a pressure regulating valve and a liquid supply part. The pressure regulating valve has an inlet, an outlet and an overflow port. The pressure regulating valve is connected to a water supply pipeline through the inlet and the outlet. The overflow port is connected to the water supply part through an overflow pipeline. The pressure regulating valve is used to adjust the water pressure of the water supply pipeline by causing water to overflow to the water supply part through the overflow pipeline. The liquid supply part is connected to the water supply pipeline through an anti-freezing pipeline. The liquid supply part is used to discharge water in the water supply pipeline and the overflow pipeline by using anti-freezing liquid and to fill the water supply pipeline and the overflow pipeline with the anti-freezing liquid. The watering system of the application uses the anti-freezing liquid to replace the water in the water supply pipeline and the system components. Before the next operation, the conveying part can be started without water injection and emptying, which reduces the preparation procedure during operation, is simple and convenient, and is beneficial to improving work efficiency.

Description

Technical Field

[0001] This application relates to the field of engineering machinery, and more particularly to a water spraying system and a road milling machine. Background Technology

[0002] Some construction machinery (such as road milling machines) is equipped with a water sprinkler system. During winter construction, the water in the water sprinkler system is prone to freezing. Once frozen, it may damage system components such as water pumps, water filters, regulating valves, hoses, and hose reels.

[0003] Existing technologies include sprinkler systems that use compressed air to drain water after winter operations to prevent water from freezing.

[0004] However, this solution also has some drawbacks. Since sprinkler systems are usually equipped with water pumps, which need to be filled and emptied when started, this solution uses compressed air to empty the water in the system after the operation, and then needs to be filled and emptied again before the next use, which increases the complexity of the operation. Therefore, further improvements are necessary. Utility Model Content

[0005] This application provides a water spraying system and a road milling machine. The water spraying system uses antifreeze to replace the water in the water supply pipeline and various system components. Before the next operation, there is no need to refill or drain the water before starting the conveying unit, which reduces the preparation procedures during operation, is simple and convenient, and helps to improve work efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a sprinkler system, comprising: a water supply section, a conveying section, and a sprinkler section connected sequentially in a water supply pipeline, wherein the water supply section is used for storing water, the sprinkler section is used for sprinkling water to the outside, and the conveying section is used for causing water in the water supply section to flow to the sprinkler section; and a pressure regulating valve having an inlet, an outlet, and an overflow port, wherein the pressure regulating valve is connected to the water supply pipeline through the inlet and the outlet, and the overflow port is connected to the water supply section through an overflow pipeline, and the pressure regulating valve is used to regulate the water pressure of the water supply pipeline by causing water to overflow to the water supply section through the overflow pipeline;

[0008] The antifreeze supply section is used to store antifreeze. It is connected to the water supply line via antifreeze piping and is used to drain water from the water supply line and overflow line using antifreeze, and to fill the water supply line and overflow line with antifreeze.

[0009] As an optional implementation, the water supply pipeline includes an inlet pipe and a manifold. The first end of the inlet pipe is connected to the water supply unit, the second end of the inlet pipe is connected to the first end of the manifold, and the second end of the manifold is connected to the delivery unit. The first end of the antifreeze pipeline is connected to the liquid supply unit, and the second end of the antifreeze pipeline is connected to the first end of the manifold.

[0010] As an optional implementation, a first shut-off valve is installed on the water inlet pipe; a second shut-off valve is installed on the antifreeze pipe.

[0011] As an optional implementation, the sprinkler system also includes a filter unit disposed in the manifold for filtering impurities in the water or antifreeze.

[0012] As an optional implementation, the sprinkler unit includes a sprinkler assembly, which includes multiple sprinkler heads and multiple third shut-off valves. The multiple sprinkler heads are connected in parallel, and the multiple third shut-off valves are correspondingly installed in the pipelines where the multiple sprinkler heads are located, for individually controlling the opening and closing of each sprinkler head.

[0013] As an optional implementation, the sprinkler unit also includes a high-pressure nozzle and a fourth shut-off valve. The high-pressure nozzle is connected in parallel with the sprinkler assembly, and the fourth shut-off valve is located in the pipeline where the high-pressure nozzle is located to control the opening and closing of the high-pressure nozzle.

[0014] As an alternative implementation, the inlet of the pressure regulating valve is connected to the outlet of the conveying section, and the outlet of the pressure regulating valve is connected to the inlet of the sprinkler section.

[0015] As an optional implementation, the water supply section is equipped with a first liquid level sensor for monitoring the water level in the water supply section; the liquid supply section is equipped with a second liquid level sensor for monitoring the antifreeze level in the liquid supply section.

[0016] As an optional implementation, the volume of the liquid supply unit is set to be greater than or equal to 10L and less than or equal to 50L.

[0017] Secondly, this application provides a road milling machine that includes the water spraying system described above.

[0018] The sprinkler system of this application uses antifreeze to replace the water in the water supply pipeline and various system components. In other words, the sprinkler system is always filled with liquid. Therefore, the delivery unit can be started without water filling and emptying before the next operation, which reduces the preparation procedures during operation, is simple and convenient, and helps to improve work efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a sprinkler system provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Sprinkler system; 110. Water supply unit; 112. Water inlet; 114. First liquid level sensor; 120. Conveying unit; 130. Sprinkler unit; 132. Sprinkler assembly; 132a. Sprinkler nozzle; 132b. Third shut-off valve; 134. High-pressure nozzle; 136. Fourth shut-off valve; 140. Pressure regulating valve; 142. Inlet; 144. Outlet; 146. Overflow port; 150. Overflow pipeline; 160. Liquid supply unit; 162. Second liquid level sensor; 170. Antifreeze pipeline; 172. Second shut-off valve; 180. Water supply pipeline; 182. Inlet pipe; 182a. First shut-off valve; 184. Manifold; 190. Filter unit. Detailed Implementation

[0023] Existing technologies include sprinkler systems that use compressed air to drain the system after winter operations to prevent water from freezing. However, this approach has some drawbacks. Since sprinkler systems typically include a water pump, which requires filling and emptying during startup, this method requires repeated filling and emptying operations before the next use, increasing the complexity of the process.

[0024] To overcome the shortcomings of the prior art, this application provides a sprinkler system that uses antifreeze to replace the water in the water supply pipeline and various system components. In other words, the sprinkler system is always filled with liquid. Thus, the delivery unit can be started without water filling and emptying before the next operation, reducing the preparation procedures during operation, making it simple and convenient, and improving work efficiency.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] See Figure 1 This application provides a water spraying system 100, which includes a water supply unit 110, a conveying unit 120, a spraying unit 130, a pressure regulating valve 140, an overflow pipe 150, a liquid supply unit 160, and an antifreeze pipe 170.

[0027] The water supply section 110, the conveying section 120, and the sprinkling section 130 are sequentially connected to the water supply pipeline 180. The water supply section 110 is used for water storage, the sprinkling section 130 is used for sprinkling water to the outside, and the conveying section 120 is used to cause the water in the water supply section 110 to flow to the sprinkling section 130. The pressure regulating valve 140 has an inlet 142, an outlet 144, and an overflow port 146. The pressure regulating valve 140 is connected to the water supply pipeline 180 through the inlet 142 and the outlet 144, and the overflow port 146 is connected to the water supply section 110 through the overflow pipeline 150. The pressure regulating valve 140 is used to regulate the water pressure of the water supply pipeline 180 by allowing water to overflow to the water supply section 110 through the overflow pipeline 150. The liquid supply unit 160 is used to store antifreeze. The liquid supply unit 160 is connected to the water supply pipe 180 through the antifreeze pipe 170. It is used to drain the water in the water supply pipe 180 and the overflow pipe 150 using antifreeze, and to fill the water supply pipe 180 and the overflow pipe 150 with antifreeze.

[0028] The water supply unit 110 can be a water tank for storing working water. It has a water inlet 112 on the top and a water outlet at the bottom, which is connected to the water supply pipeline 180.

[0029] The conveying unit 120 is a water pump used to provide water flow power to transport water from the water supply unit 110 to the sprinkler unit 130. The water pump inlet is connected to the water supply unit 110 through the water supply pipeline 180, and the water pump outlet is connected to the sprinkler unit 130.

[0030] The pressure regulating valve 140 has an inlet 142, an outlet 144, and an overflow port 146. The inlet 142 and the outlet 144 are connected to the water supply pipeline 180, and the overflow port 146 is connected to the water supply unit 110 through the overflow pipeline 150. When the water pressure in the water supply pipeline 180 exceeds the set value, the pressure regulating valve 140 opens the overflow port 146, allowing some water to flow back to the water supply unit 110 through the overflow pipeline 150, thereby regulating the water pressure in the water supply pipeline 180 and ensuring the safe operation of the system.

[0031] The liquid supply section 160 is an antifreeze tank used to store antifreeze. Antifreeze has a lower freezing point than water, and its freezing point can be below -45°C, making it more resistant to freezing than water in cold weather.

[0032] The liquid supply unit 160 is connected to the water supply pipe 180 via the antifreeze pipe 170, so that the antifreeze performance of the water supply pipe 180 can be improved by filling the water supply pipe 180 with antifreeze.

[0033] Specifically, after the watering operation is completed, the outlet of the water supply unit 110 is closed, the outlet of the liquid supply unit 160 is opened, and the antifreeze is introduced into various positions of the watering system 100 through the delivery unit 120. The antifreeze replaces the water in the water supply pipe 180 and various system components, thereby improving the waterproof performance of the system.

[0034] For example, when replacing the antifreeze, the pipeline of the sprinkler unit 130 is opened, so that the antifreeze can flow to the sprinkler unit 130. When the antifreeze flows out of the sprinkler nozzle of the sprinkler unit 130, the sprinkler unit 130 completes the antifreeze replacement.

[0035] For example, when replacing antifreeze, by setting a preset pressure on the pressure regulating valve 140, the overflow port 146 of the pressure regulating valve 140 is opened, so that antifreeze can flow from the overflow port 146 of the pressure regulating valve 140 and return to the water supply section 110 through the overflow pipe 150. When antifreeze appears in the water supply section 110, the pressure regulating valve 140 and the overflow pipe 150 complete the antifreeze replacement.

[0036] In addition, when the pressure regulating valve 140 and the overflow pipe 150 replace the antifreeze, a portion of the antifreeze is discharged into the water supply section 110. This also lowers the freezing point of the water in the water supply section 110, eliminating the need to drain the water supply section 110 after the operation is completed, reducing the frequency of water addition and improving work efficiency.

[0037] It should be noted that since adding some antifreeze to the water can achieve the antifreeze effect, it is not necessary to completely drain the water in the system when replacing the antifreeze.

[0038] Compared to the method of draining water using compressed air, the water spraying system 100 of this application uses antifreeze to replace the water in the water supply pipe 180 and the water in each system component. In other words, the water spraying system 100 is always filled with liquid. Thus, before the next operation, there is no need to refill and drain the water before starting the delivery unit 120, which reduces the preparation procedures during operation, is simple and convenient, and helps to improve work efficiency.

[0039] In some embodiments, the water supply line 180 may further include an inlet pipe 182 and a manifold 184. The first end of the inlet pipe 182 is connected to the water supply unit 110, and the second end of the inlet pipe 182 is connected to the first end of the manifold 184. The second end of the manifold 184 is connected to the delivery unit 120. The first end of the antifreeze line 170 is connected to the liquid supply unit 160, and the second end of the antifreeze line 170 is connected to the first end of the manifold 184.

[0040] The first end of the water inlet pipe 182 is connected to the water supply unit 110, the first end of the antifreeze pipe 170 is connected to the liquid supply pipe, the second end of the water inlet pipe 182 and the second end of the antifreeze pipe 170 are connected to the first end of the manifold 184, the second end of the manifold 184 can also be connected to the inlet of the conveying unit 120, and the outlet 144 of the conveying unit 120 can also be connected to the sprinkler unit 130.

[0041] When watering is being carried out, the inlet pipe 182 is connected to the manifold 184, and the water in the water supply section 110 can be transported to the conveying section 120 through the inlet pipe 182 and the manifold 184, and then the water pressure is increased and transported to the watering section 130.

[0042] When the antifreeze is replaced, the antifreeze line 170 is connected to the manifold 184. The water in the supply section 160 can be transported to the delivery section 120 through the antifreeze line 170 and the manifold 184, thereby increasing the pressure of the antifreeze and delivering it to the spray section 130.

[0043] See Figure 1 Furthermore, a first shut-off valve 182a is installed on the water inlet pipe 182. A second shut-off valve 172 is installed on the antifreeze pipe 170.

[0044] The first shut-off valve 182a is installed on the water inlet pipe 182, and the second shut-off valve 172 is installed on the antifreeze pipe 170. These two valves work together to flexibly switch between water and antifreeze, enabling precise switching between normal operation and antifreeze modes for the sprinkler system 100. During normal sprinkler operation, the first shut-off valve 182a is opened and the second shut-off valve 172 is closed, allowing water from the water supply unit 110 to flow smoothly through the water inlet pipe 182 into the conveying unit 120, and then be sprayed onto the outside via the sprinkler unit 130. When drainage and antifreeze operation is required, the first shut-off valve 182a is closed, blocking the water flow to the water supply unit 110, while the second shut-off valve 172 is opened, allowing antifreeze from the liquid supply unit 160 to enter the water supply pipe 180 along the antifreeze pipe 170, replacing any accumulated water and preventing the mixing of the two liquids from interfering with the operation process. This ensures the stability and reliability of the system operation in each mode.

[0045] Furthermore, the sprinkler system 100 may also include a filter section 190, which is disposed in the manifold 184 and is used to filter impurities in the water or antifreeze.

[0046] The filter section 190 is located in the manifold 184. It effectively intercepts sediment, rust, scale fragments, and any additive crystals or impurities that may be present in the antifreeze as water or antifreeze flows through it. During normal watering operations, the filtered water enters the delivery section 120 and the spraying section 130, preventing nozzle clogging and pump impeller wear, ensuring stable water output, and maintaining the continuity and uniformity of the watering operation. During antifreeze operations, clean antifreeze circulates more smoothly in the pipeline, preventing impurities from accumulating in valves, filters, and other critical components. This ensures efficient antifreeze replacement and avoids incomplete antifreeze treatment due to impurities.

[0047] Furthermore, during the drainage and antifreeze process, if the antifreeze contains impurities, these impurities may accumulate in pipe bends and narrow sections, obstructing the flow of antifreeze and preventing some pipes or components from being fully filled with antifreeze, creating antifreeze blind spots. The filter unit 190 ensures that the antifreeze entering the system is clean, enabling it to uniformly and efficiently displace water accumulated in the pipes and form a complete antifreeze protective layer on the surface of each component. This improves the system's antifreeze success rate in cold environments and avoids the risk of equipment damage due to impurities.

[0048] See Figure 1 In some embodiments, the sprinkler unit 130 includes a sprinkler assembly 132, which includes multiple sprinkler heads 132a and multiple third shut-off valves 132b. The multiple sprinkler heads 132a are arranged in parallel, and the multiple third shut-off valves 132b are arranged one-to-one in the pipeline where the multiple sprinkler heads 132a are located, for individually controlling the opening and closing of each sprinkler head 132a.

[0049] Multiple low-pressure sprinkler heads 132a are connected in parallel, and each nozzle is equipped with an independent third shut-off valve 132b. Operators can freely choose to open or close any nozzle according to actual operational needs, achieving precise water spraying. When the road milling machine is operating, if only local dust suppression is required, only the nozzles in the corresponding area can be turned on to avoid water waste while ensuring dust suppression effectiveness. When operating on narrow roads or complex terrain, the nozzle combination can be flexibly adjusted to make the water spraying coverage more suitable for the actual working conditions, improving the flexibility and targeting of the operation.

[0050] See Figure 1 Furthermore, the sprinkler unit 130 also includes a high-pressure nozzle 134 and a fourth shut-off valve 136. The high-pressure nozzle 134 is connected in parallel with the sprinkler assembly 132, and the fourth shut-off valve 136 is located in the pipeline where the high-pressure nozzle 134 is located, and is used to control the opening and closing of the high-pressure nozzle 134.

[0051] The parallel connection of the high-pressure nozzle 134 and the water spray assembly 132 enables the water spray system 100 to output high-pressure water flow, making it particularly suitable for deep cleaning scenarios after road milling operations. For example, stubborn asphalt debris and adhering mud remaining on the road surface after milling operations are difficult to remove with low-pressure water spray nozzles 132a, while the powerful water flow from the high-pressure nozzle 134 can quickly wash away these attachments, significantly improving cleaning efficiency. In road washing operations after municipal construction, the high-pressure nozzle 134 can also efficiently wash away road surface oil stains and accumulated dust, meeting high cleaning standards and allowing the water spray system 100 to efficiently complete tasks even under complex working conditions.

[0052] See Figure 1 Furthermore, the inlet 142 of the pressure regulating valve 140 is connected to the outlet of the conveying section 120, and the outlet of the pressure regulating valve 140 is connected to the inlet of the sprinkling section 130.

[0053] The pressure regulating valve 140 automatically adjusts the water flow path and flow rate according to the changes in water pressure in the pipeline, so as to achieve precise control of the working pressure of the sprinkler group 132 and the high-pressure nozzle 134.

[0054] When the water pressure in the pipeline where the sprinkler assembly 132 or the high-pressure nozzle 134 is located exceeds the preset value, the overflow port 146 of the pressure regulating valve 140 opens, and part of the water flows back to the water supply section 110 through the overflow pipeline 150, reducing the pipeline pressure; when the water pressure is lower than the preset value, the pressure regulating valve 140 automatically adjusts the valve opening to reduce the amount of backflow water and maintain stable pipeline pressure.

[0055] When replacing the antifreeze, the preset pressure of the pressure regulating valve 140 can be set to a lower value. As the antifreeze is injected, the water pressure in the entire water supply pipeline 180 system increases. When the pressure exceeds the preset pressure of the pressure regulating valve 140, the overflow port 146 of the pressure regulating valve 140 opens. At this time, some antifreeze will flow back to the water supply section 110 through the overflow pipe 150, thereby reducing the pressure in the pipeline and preventing damage to components such as the water pump, pipe joints, and nozzles due to excessive pressure. Simultaneously, the overflow pipe 150 is used to replace the antifreeze, and antifreeze is added to the water supply section 110.

[0056] See Figure 1 In some embodiments, the water supply unit 110 is provided with a first liquid level sensor 114, which is used to monitor the water level in the water supply unit 110. The liquid supply unit 160 is provided with a second liquid level sensor 162, which is used to monitor the antifreeze level in the liquid supply unit 160.

[0057] The first liquid level sensor 114 monitors the water level of the water supply unit 110 in real time. When the water level drops to a preset threshold, the system can automatically trigger an alarm or link with external water supply equipment to replenish water, avoiding interruption of watering operations due to water shortage. For example, during long-term operation of a road milling machine, it can ensure the continuous and stable operation of dust suppression, cooling and other functions, improving construction efficiency.

[0058] The second liquid level sensor 162 monitors the antifreeze level in the liquid supply unit 160. Before antifreeze operation, it can confirm whether the antifreeze storage is sufficient. If the liquid level is insufficient, it will remind you to add more in time to prevent incomplete antifreeze treatment due to antifreeze shortage. This ensures the reliable operation of the system in cold environments and reduces the impact of equipment freezing damage on the operation progress.

[0059] In some embodiments, the volume of the liquid supply unit 160 is set to be greater than or equal to 10L and less than or equal to 50L, such as 10L, 20L, 30L, 40L, 50L, etc.

[0060] The aforementioned volume range ensures that the fluid supply unit 160 stores sufficient antifreeze to meet the drainage and antifreeze requirements of the road milling machine's water system. Generally, the total volume of the milling machine's water system components, including pipes, pumps, and nozzles, is limited. Antifreeze within this volume range can fully replace water in the system and form an effective antifreeze layer on the pipes and components. If the volume is too small, the antifreeze may not be sufficient for complete replacement, resulting in incomplete antifreeze treatment. If the volume is too large, it will not only waste antifreeze but also increase circulation time and reduce antifreeze efficiency. A volume range of 10L-50L ensures efficient replacement while maintaining antifreeze effectiveness.

[0061] This application also provides a road milling machine, which is equipped with the water spraying system 100 in any of the above embodiments.

[0062] In the water spraying system 100 of the road milling machine of this application, the conveying unit 120 can draw water from the water supply unit 110 and discharge it to the spraying unit 130 to realize the water spraying function or the car washing function during operation.

[0063] Furthermore, the conveying unit 120 can also extract antifreeze from the liquid section to replace the antifreeze in the water supply pipeline 180 and auxiliary equipment, preventing the sprinkler system 100 from freezing in cold winter weather. Compared to using compressed air for drainage, the sprinkler system 100 of this application is always filled with liquid. Thus, before the next operation, there is no need to refill and drain the water before starting the conveying unit 120, reducing the preparation procedures during operation, making it simple and convenient, and improving work efficiency.

[0064] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0065] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0066] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0067] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of devices in use or operation other than those shown in the figures. Devices may have other orientations, and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sprinkler system, characterized in that, include: A water supply section, a conveying section, and a sprinkling section are sequentially connected in a water supply pipeline. The water supply section is used for storing water, the sprinkling section is used for sprinkling water to the outside, and the conveying section is used to facilitate the flow of water in the water supply section to the sprinkling section. A pressure regulating valve has an inlet, an outlet, and an overflow port. The pressure regulating valve is connected to the water supply pipeline through the inlet and the outlet, and the overflow port is connected to the water supply unit through an overflow pipeline. The pressure regulating valve is used to regulate the water pressure of the water supply pipeline by allowing water to overflow to the water supply unit through the overflow pipeline. The liquid supply unit is used to store antifreeze. The liquid supply unit is connected to the water supply pipe through the antifreeze pipe. It is used to drain the water in the water supply pipe and the overflow pipe using antifreeze, and to fill the water supply pipe and the overflow pipe with antifreeze.

2. The sprinkler system according to claim 1, characterized in that, The water supply pipeline includes an inlet pipe and a manifold. The first end of the inlet pipe is connected to the water supply unit, the second end of the inlet pipe is connected to the first end of the manifold, and the second end of the manifold is connected to the conveying unit. The first end of the antifreeze pipe is connected to the liquid supply unit, and the second end of the antifreeze pipe is connected to the first end of the manifold.

3. The sprinkler system according to claim 2, characterized in that, A first shut-off valve is installed on the water inlet pipe; A second shut-off valve is installed on the antifreeze pipeline.

4. The sprinkler system according to claim 2, characterized in that, Also includes: A filtration section is provided in the manifold and is used to filter impurities in water or antifreeze.

5. The sprinkler system according to any one of claims 1 to 4, characterized in that, The sprinkler unit includes a sprinkler assembly, which includes multiple sprinkler heads and multiple third shut-off valves. The multiple sprinkler heads are connected in parallel, and the multiple third shut-off valves are correspondingly installed in the pipelines where the multiple sprinkler heads are located, for individually controlling the opening and closing of each sprinkler head.

6. The sprinkler system according to claim 5, characterized in that, The sprinkler unit also includes a high-pressure nozzle and a fourth shut-off valve. The high-pressure nozzle is connected in parallel with the sprinkler assembly, and the fourth shut-off valve is located in the pipeline where the high-pressure nozzle is located to control the opening and closing of the high-pressure nozzle.

7. The sprinkler system according to any one of claims 1 to 4, characterized in that, The inlet of the pressure regulating valve is connected to the outlet of the conveying unit, and the outlet of the pressure regulating valve is connected to the inlet of the sprinkler unit.

8. The sprinkler system according to any one of claims 1 to 4, characterized in that, The water supply unit is equipped with a first liquid level sensor, which is used to monitor the water level in the water supply unit. The liquid supply section is equipped with a second liquid level sensor, which is used to monitor the antifreeze liquid level in the liquid supply section.

9. The sprinkler system according to any one of claims 1 to 4, characterized in that, The volume of the liquid supply unit is set to be greater than or equal to 10L and less than or equal to 50L.

10. A road milling machine, characterized in that, Includes the sprinkler system according to any one of claims 1 to 9.

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