Automatic suction grouting vehicle

Abstract

The application discloses an automatic material suction and grouting vehicle, which comprises a chassis, a walking assembly, a material suction assembly, a stirring assembly and a grouting assembly, the walking assembly is used for driving the chassis to move, the material suction assembly is used for sucking dry powder slurry into the storage barrel by using negative pressure, the stirring assembly is used for receiving the dry powder slurry discharged from the storage barrel and stirring and mixing with water to form slurry, and the grouting assembly is used for grouting the qualified slurry prepared by the stirring assembly. The automatic material suction and grouting vehicle can greatly reduce the work burden of manual carrying, feeding and stirring through automatic material suction, stirring and grouting. The automatic material suction and grouting vehicle has high automation degree, reduces the manual operation time, improves the efficiency and continuity of grouting operation, makes the grouting reinforcement effect more reliable through accurate control of the proportioning and uniformity of the slurry, reduces the manual operation, reduces the dust and noise pollution on site, and improves the working environment.

Description

Technical Field

[0001] The invention relates to the technical field of grouting equipment, in particular to an automatic material suction grouting vehicle. Background Art

[0002] Grouting is a common reinforcement method in the coal industry. Currently, the primary grouting equipment in this industry consists of grouting pumps and mixing drums. Grouting equipment has a low level of integration, and transportation relies primarily on manual lifting, carrying, and dragging. Furthermore, manual loading is extremely labor-intensive. Furthermore, the grouting equipment lacks intelligent control, and manual loading makes it difficult to control the water-cement ratio, hindering the grouting material's performance and compromising its effectiveness. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an automatic material suction grouting vehicle.

[0005] The automatic suction grouting vehicle of an embodiment of the present invention includes a chassis, a walking assembly, a suction assembly, a stirring assembly and a grouting assembly. The chassis is arranged on the walking assembly, and the walking assembly is used to drive the chassis to move; the suction assembly is arranged on the chassis, and the suction assembly includes a vacuum generator, a storage barrel and a suction pipe. The vacuum generator is connected to the storage barrel and is used to extract air in the storage barrel to form a negative pressure in the storage barrel. The suction pipe is arranged on the storage barrel and is used to use the negative pressure in the storage barrel to suck the dry powder slurry into the storage barrel; the stirring assembly is arranged on the chassis and is connected to the storage barrel, and is used to receive the dry powder slurry discharged from the storage barrel and stir and mix it with water to form a slurry; the grouting assembly is arranged on the chassis and is connected to the stirring assembly, and is used to prepare qualified slurry by the stirring assembly for grouting.

[0006] In some embodiments, the suction assembly further includes a filter cartridge, the vacuum generator is connected to the storage barrel through the filter cartridge, and the filter cartridge is used to filter the dry powder slurry.

[0007] In some embodiments, the filter cartridge includes a cartridge body, a plurality of filter cores, and a valve. The plurality of filter cores are arranged in the cartridge body at intervals along the axial direction of the cartridge body. The valve is arranged at the bottom of the cartridge body to open the cartridge body.

[0008] In some embodiments, a first air pipe is provided between the top of the cylinder and the vacuum generator, a second air pipe is provided between the bottom of the cylinder and the top of the storage barrel, and the first air pipe is provided away from the suction pipe.

[0009] In some embodiments, the suction assembly further includes a reversing valve, which is disposed between the first air pipe and the vacuum generator. When the weight of the dry powder slurry in the storage barrel exceeds a preset value, the reversing valve is reversed to allow the vacuum generator to blow air into the storage barrel.

[0010] In some embodiments, the automatic suction grouting vehicle of the embodiment of the present invention further includes a plurality of support ears and a plurality of support columns, and the plurality of support ears correspond one to one to the plurality of support columns, and the plurality of support ears are arranged at intervals along the circumference of the storage barrel, and the support ears are downwardly stopped on the top end surface of the support column, and the bottom of the storage barrel is spaced apart from the chassis, and a pressure sensor is provided between the support ears and the support columns, and the pressure sensor is used to detect the weight of the dry powder slurry in the storage barrel.

[0011] In some embodiments, a discharge port is provided at the bottom of the storage barrel, and a discharge valve is provided on the discharge port. The automatic suction grouting vehicle also includes a screw loader, and the stirring assembly includes a stirring barrel. The feed port of the screw loader is connected to the discharge port of the storage barrel, and the discharge port of the screw loader is connected to the stirring barrel.

[0012] In some embodiments, the number of the mixing barrels and the discharge ports are both multiple and one-to-one corresponding, and each of the discharge ports is provided with a discharge valve.

[0013] In some embodiments, the stirring assembly further includes a horizontal stirrer, which is disposed on the stirring barrel and is used to stir the water and dry powder slurry in the stirring barrel.

[0014] In some embodiments, a water inlet is provided on the mixing barrel, and a flow meter is provided at the water inlet.

[0015] The automatic suction grouting vehicle of the embodiment of the present invention significantly reduces the workload of manual handling, loading, and mixing by automatically sucking, stirring, and grouting. Its high degree of automation reduces manual operation time and improves the efficiency and continuity of grouting operations. The machine automatically controls the water-cement ratio, avoiding the instability of the water-cement ratio during manual loading and ensuring that the performance of the grouting material is fully utilized. By precisely controlling the proportion and uniformity of the slurry, the grouting reinforcement effect is more reliable, contributing to improved production safety in the coal industry. The reduction in manual operation reduces on-site dust and noise pollution, improving the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an automatic material suction grouting vehicle according to an embodiment of the present invention.

[0017] Figure 22. It is a top view of the automatic material suction grouting vehicle according to an embodiment of the present invention.

[0018] Figure 3 It is a partially enlarged view of the automatic material suction grouting vehicle according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 100. Automatic suction grouting vehicle; 1. Chassis; 2. Travel assembly; 3. Suction assembly; 301. Vacuum generator; 302. Storage barrel; 303. Suction pipe; 304. Filter cartridge; 305. First air pipe; 306. Second air pipe; 307. Reversing valve; 4. Stirring assembly; 401. Stirring barrel; 402. Horizontal agitator; 5. Grouting assembly; 6. Support ears; 7. Support columns; 8. Pressure sensor; 9. Discharge valve; 10. Screw loader; 11. Discharge valve; 12. Flow meter. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] like Figures 1 to 3 As shown, the automatic suction grouting vehicle 100 of the embodiment of the present invention includes a chassis 1, a traveling assembly 2, a suction assembly 3, a stirring assembly 4, and a grouting assembly 5. The chassis 1 is arranged on the traveling assembly 2, and the traveling assembly 2 is used to drive the chassis 1 to move. The suction assembly 3 is arranged on the chassis 1, and the suction assembly 3 includes a vacuum generator 301, a storage barrel 302, and a suction pipe 303. The vacuum generator 301 is connected to the storage barrel 302 and is used to extract air from the storage barrel 302 to form a negative pressure in the storage barrel 302. The suction pipe 303 is arranged on the storage barrel 302 and is used to use the negative pressure in the storage barrel 302 to suck the dry powder slurry into the storage barrel 302. The stirring assembly 4 is arranged on the chassis 1 and is connected to the storage barrel 302. It is used to receive the dry powder slurry discharged from the storage barrel 302 and stir and mix it with water to form a slurry. The grouting assembly 5 is arranged on the chassis 1 and is connected to the stirring assembly 4, and is used to prepare qualified slurry by the stirring assembly 4 for grouting.

[0023] When the automatic suction grouting vehicle 100 of the embodiment of the present invention is in use, the chassis 1 is installed on the walking assembly 2, and the automatic suction grouting vehicle 100 is driven by the walking assembly 2 to be able to move flexibly on site in the coal industry. The vacuum generator 301 is started and connected to the storage barrel 302 to extract the air in the storage barrel 302 to form a negative pressure. The dry powder slurry is sucked into the storage barrel 302 by the negative pressure through the suction pipe 303. The dry powder slurry in the storage barrel 302 is stirred and mixed with water by the stirring assembly 4. The stirring assembly 4 ensures that the ratio of dry powder to water is uniform, forming a slurry suitable for grouting. The prepared slurry is grouting through the grouting assembly 5. The grouting assembly 5 ensures the uniform injection of the slurry to achieve the purpose of reinforcement.

[0024] The automatic suction grouting vehicle 100 of the embodiment of the present invention significantly reduces the workload of manual handling, loading, and mixing by automatically sucking, stirring, and grouting. Its high degree of automation reduces manual operation time and improves the efficiency and continuity of grouting operations. The machine automatically controls the water-cement ratio, avoiding the instability of the water-cement ratio during manual loading and ensuring that the performance of the grouting material is fully utilized. By precisely controlling the proportion and uniformity of the slurry, the grouting reinforcement effect is more reliable, contributing to improved safety production levels in the coal industry. The reduction in manual operation reduces on-site dust and noise pollution, improving the working environment.

[0025] In some embodiments, the suction assembly 3 further includes a filter cartridge 304, through which the vacuum generator 301 communicates with the storage barrel 302. The filter cartridge 304 is used to filter the dry powder slurry. The filter cartridge 304 is located between the vacuum generator 301 and the storage barrel 302. During operation, the filter cartridge 304 filters the dry powder slurry to prevent it from being sucked into the vacuum generator 301.

[0026] In some embodiments, the filter cartridge 304 includes a cartridge body, a plurality of filter cores, and a valve. The plurality of filter cores are arranged in the cartridge body at intervals along the axial direction of the cartridge body, and the valve is arranged at the bottom of the cartridge body to open the cartridge body.

[0027] Multiple filter elements can achieve multi-stage filtration, which is beneficial to improving the working reliability of the filter cartridge 304. In addition, after the filter cartridge 304 has been working for a certain period of time, the dry powder slurry filtered in the cartridge is cleared by opening the valve to ensure the filtering effect of the filter cartridge 304.

[0028] In some embodiments, a first air pipe 305 is provided between the top of the cylinder and the vacuum generator 301 , a second air pipe 306 is provided between the bottom of the cylinder and the top of the storage barrel 302 , and the first air pipe 305 is provided away from the suction pipe 303 .

[0029] The first air pipe 305 is connected between the top of the filter cartridge 304 and the vacuum generator 301, and is used to transmit the negative pressure generated by the vacuum generator 301 to draw the dry powder slurry into the filter cartridge 304. The second air pipe 306 is connected between the bottom of the filter cartridge 304 and the top of the storage tank 302, and is used to transfer the filtered dry powder slurry. The first air pipe 305 is positioned away from the suction pipe 303 to avoid interference between the suction pipe 303 and the first air pipe 305, ensuring a smooth suction process.

[0030] In some embodiments, the suction assembly 3 also includes a reversing valve 307, which is arranged between the first air pipe 305 and the vacuum generator 301. When the weight of the dry powder slurry in the storage barrel 302 exceeds a preset value, the reversing valve 307 is reversed to allow the vacuum generator 301 to blow air into the storage barrel 302.

[0031] When the weight of the dry powder slurry in storage barrel 302 reaches a preset value, the weight detection device sends a signal. Based on the signal from the weight detection device, reversing valve 307 reverses the direction of the airflow generated by vacuum generator 301, blowing air into storage barrel 302. The air blown in by vacuum generator 301 helps loosen the dry powder slurry in storage barrel 302, preventing it from clumping and ensuring even distribution within storage barrel 302. When the weight of the slurry in storage barrel 302 falls below the preset value, reversing valve 307 reverses again, resuming the suction mode.

[0032] The combination of the reversing valve 307 and the weight detection device automatically controls the weight of the dry powder slurry in the storage tank 302, preventing overloading. Automatically controlling the slurry weight reduces safety risks associated with overloading the storage tank 302. Blowing air into the storage tank 302 prevents slurry from clumping and maintains good fluidity and uniformity. Automatic reversal reduces the frequency of manual intervention and improves grouting efficiency.

[0033] In some embodiments, the automatic suction grouting vehicle 100 of the present invention further includes a plurality of support ears 6 and a plurality of support columns 7, with the plurality of support ears 6 corresponding one-to-one to the plurality of support columns 7. The plurality of support ears 6 are arranged at intervals along the circumference of the storage barrel 302, with the support ears 6 resting downwardly on the top surfaces of the support columns 7. The bottom of the storage barrel 302 is spaced apart from the chassis 1. A pressure sensor 8 is provided between the support ears 6 and the support columns 7. The pressure sensor 8 is used to detect the weight of the dry powder slurry in the storage barrel 302.

[0034] When the weight of the dry powder slurry in the storage barrel 302 changes, the pressure on the support ears 6 also changes accordingly. The pressure sensor 8 converts the detected pressure value into an electrical signal and transmits it to the control system. The control system calculates the weight of the slurry in the storage barrel 302 based on the signal from the pressure sensor 8 and compares it with a preset value. If the weight of the slurry in the storage barrel 302 exceeds the preset value, the control system instructs the reversing valve 307 to reverse direction, and the vacuum generator 301 begins to blow air into the storage barrel 302, reducing the weight of the storage barrel 302. When the weight of the slurry in the storage barrel 302 falls below the preset value, the control system instructs the reversing valve 307 to resume the suction state.

[0035] The use of pressure sensor 8 provides precise weight detection, helping to ensure the accuracy and efficiency of grouting operations. The design of the support mechanism and pressure sensor 8 ensures that the storage barrel 302 remains stable during transportation and grouting, improving safety. The entire weight detection and direction control process is highly automated, reducing manual intervention and improving operational efficiency. By monitoring the weight of the storage barrel 302 in real time, operators can promptly understand the state of the slurry, facilitating the adjustment and optimization of grouting parameters. This eliminates the risk of equipment damage caused by excessive slurry in the storage barrel 302 and extends the equipment's service life.

[0036] In some embodiments, a discharge port is provided at the bottom of the storage barrel 302, and a discharge valve 9 is provided on the discharge port. The automatic suction grouting vehicle 100 of the embodiment of the present invention further includes a screw loader 10, and the stirring assembly 4 includes a stirring barrel 401. The feed port of the screw loader 10 is connected to the discharge port of the storage barrel 302, and the discharge port of the screw loader 10 is connected to the stirring barrel 401.

[0037] When the dry powder slurry in storage tank 302 reaches a certain amount, the control system instructs discharge valve 9 to open. The dry powder slurry is discharged through the discharge port and enters screw feeder 10. The dry powder slurry enters the feed port of screw feeder 10. The screw feeder 10 conveys the dry powder slurry to the discharge port through the rotation of the screw. From the discharge port of screw feeder 10, the dry powder slurry enters mixing tank 401. In mixing tank 401, the dry powder slurry mixes with water, and the stirring assembly 4 forms a uniform slurry.

[0038] The use of the screw feeder 10 makes the transportation of dry powder slurry more continuous and efficient. The cooperation between the mixing barrel 401 and the screw feeder 10 ensures the full mixing of the dry powder slurry and water, improving the uniformity of the slurry and the quality of grouting. The automation of the discharge, transportation and stirring processes reduces manual intervention and reduces labor intensity. The setting of the discharge valve 9 and the screw feeder 10 allows the system to flexibly adjust the discharge and transportation of materials as needed. The design of the screw feeder 10 reduces the wear of the material during the transportation process and improves the reliability and service life of the equipment. The design of the entire system can adapt to different working conditions and improve the scope of application of the automatic suction grouting vehicle 100.

[0039] In some embodiments, the number of the mixing barrels 401 and the discharge port are both multiple and one-to-one corresponding, and the design of each of the multiple mixing barrels 401 and the discharge port is:

[0040] There are multiple mixing barrels 401 and one-to-one correspondence between the discharge ports. This design allows for the preparation and output of a variety of different slurries. Each discharge port is provided with a discharge valve 11 for controlling the discharge of the slurry in the respective mixing barrel 401. Each mixing barrel 401 is provided with a stirring device to ensure that the dry powder slurry is fully mixed with water to form a uniform slurry. Multiple mixing barrels 401 and discharge ports allow for the simultaneous processing of multiple slurries, significantly improving production efficiency. Different mixing barrels 401 can be used for the preparation of slurries with different ratios, increasing the flexibility of the system. Each mixing barrel 401 is independently controlled for easy maintenance and cleaning.

[0041] In some embodiments, the stirring assembly 4 further includes a horizontal stirrer 402, which is mounted on the stirring barrel 401 and configured to stir the water and dry powder slurry within the stirring barrel 401. The horizontal stirrer 402 is mounted on the stirring barrel 401 and configured to stir the water and dry powder slurry within the stirring barrel 401, thereby reducing the overall height of the stirring assembly 4 to save space.

[0042] In some embodiments, a water inlet is provided on the mixing barrel 401 , and a flow meter 12 is provided at the water inlet.

[0043] The flow meter 12 is installed at the water inlet and is used to detect and monitor the flow of water entering the mixing barrel 401 in real time. When the stirring component 4 starts working, water flows into the mixing barrel 401 through the water inlet. The flow meter 12 will measure the flow of water flowing through the water inlet in real time and transmit the data to the control system. The control system automatically adjusts the opening degree of the water inlet according to the data provided by the flow meter 12 to control the flow of water entering the mixing barrel 401. After the dry powder slurry enters the mixing barrel 401 from the screw feeder 10, the control system controls the coordination of the stirring motor and the water inlet according to the preset ratio and the data of the flow meter 12 to ensure that the mixing ratio is accurate.

[0044] The use of flow meter 12 allows for precise control of water intake, ensuring the correct mixing ratio of dry powder slurry to water and improving slurry quality. By monitoring and adjusting the flow rate in real time, the mixing process can be optimized, improving mixing efficiency and slurry uniformity. Automated flow control reduces the need for manual intervention, reduces labor intensity, and improves production efficiency. Precise flow control helps reduce water waste and meets energy conservation and emission reduction requirements. The flow meter 12 can be adjusted based on different slurry characteristics and requirements, enhancing the mixing system. Precise control of water intake reduces the risk of slurry overflow or underproduction, improving operational safety.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An automatic suction grouting vehicle, characterized in that: include: A chassis (1) and a traveling assembly (2), wherein the chassis (1) is arranged on the traveling assembly (2), and the traveling assembly (2) is used to drive the chassis (1) to move; A material suction assembly (3), the material suction assembly (3) is arranged on the chassis (1), the material suction assembly (3) comprises a vacuum generator (301), a material storage barrel (302) and a material suction pipe (303), the vacuum generator (301) is in communication with the material storage barrel (302), and is used to extract air in the material storage barrel (302) to form a negative pressure in the material storage barrel (302), and the material suction pipe (303) is arranged on the material storage barrel (302), and is used to use the negative pressure in the material storage barrel (302) to suck the dry powder slurry into the material storage barrel (302); a stirring assembly (4), the stirring assembly (4) being arranged on the chassis (1) and being in communication with the storage barrel (302), and being used for receiving the dry powder slurry discharged from the storage barrel (302) and stirring and mixing it with water to form a slurry; A grouting assembly (5), the grouting assembly (5) being arranged on the chassis (1) and being in communication with the stirring assembly (4), and being used for grouting qualified slurry prepared by the stirring assembly (4); The material suction assembly (3) further comprises a filter cartridge (304), the vacuum generator (301) is connected to the material storage barrel (302) via the filter cartridge (304), and the filter cartridge (304) is used to filter the dry powder slurry; The filter cartridge (304) comprises a cartridge body, a plurality of filter cores, and a valve. The plurality of filter cores are arranged in the cartridge body at intervals along the axial direction of the cartridge body. The valve is arranged at the bottom of the cartridge body to open the cartridge body. A first air pipe (305) is provided between the top of the cylinder and the vacuum generator (301), a second air pipe (306) is provided between the bottom of the cylinder and the top of the storage barrel (302), and the first air pipe (305) is provided away from the suction pipe (303); The material suction assembly (3) further comprises a reversing valve (307), which is arranged between the first air pipe (305) and the vacuum generator (301). When the weight of the dry powder slurry in the storage barrel (302) exceeds a preset value, the reversing valve (307) is reversed to allow the vacuum generator (301) to blow air into the storage barrel (302).

2. The automatic suction grouting vehicle according to claim 1, characterized in that: It also includes a plurality of supporting ears (6) and a plurality of supporting columns (7), wherein the plurality of supporting ears (6) correspond to the plurality of supporting columns (7) in a one-to-one manner, and the plurality of supporting ears (6) are arranged at intervals along the circumference of the storage barrel (302), and the supporting ears (6) are downwardly abutted against the top end surface of the supporting columns (7), and the bottom of the storage barrel (302) is spaced apart from the chassis (1), and a pressure sensor (8) is provided between the supporting ears (6) and the supporting columns (7), and the pressure sensor (8) is used to detect the weight of the dry powder slurry in the storage barrel (302).

3. The automatic suction grouting vehicle according to claim 1, characterized in that: The bottom of the storage barrel (302) is provided with a discharge port, and the discharge port is provided with a discharge valve (9). The automatic suction grouting vehicle also includes a screw loader (10). The stirring assembly (4) includes a stirring barrel (401). The feed port of the screw loader (10) is connected to the discharge port of the storage barrel (302), and the discharge port of the screw loader (10) is connected to the stirring barrel (401).

4. The automatic suction grouting vehicle according to claim 3, characterized in that: The number of the mixing barrels (401) and the discharge ports are both multiple and one-to-one corresponding, and each of the discharge ports is provided with a discharge valve (11).

5. The automatic material suction grouting vehicle according to claim 4, characterized in that: The stirring assembly (4) further comprises a horizontal stirrer (402), and the horizontal stirrer (402) is arranged on the stirring barrel (401) and is used for stirring the water and dry powder slurry in the stirring barrel (401).

6. The automatic material suction grouting vehicle according to claim 5, characterized in that: The mixing barrel (401) is provided with a water inlet, and a flow meter (12) is provided at the water inlet.

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