Vibrating type gravel aggregate screening equipment for commercial mixing station
By designing vibrating sand and gravel aggregate screening equipment in the commercial mixing station and using multi-stage vibrating screen components and sand-water separation mechanisms, the problem that existing equipment cannot recover fine sand in sewage is solved, and sand and gravel aggregates are realized Efficient recycling of materials and effective use of resources.
Patent Information
- Application Number
- CN202421143794.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The existing sand and gravel screening equipment cannot recycle the fine sand in the sewage, resulting in blockage of sewage discharge pipelines and waste of resources.
Design a vibrating sand and gravel aggregate screening equipment for a commercial mixing station. It uses a multi-stage vibrating screen assembly and a sand-water separation mechanism. The sand-water mixture in the sewage is pumped into the separation cylinder through a feed pump, and the sand-water separation assembly is used to separate the sand and gravel. Separate from water to realize sand recovery.
Effectively recycled sand and gravel aggregates, avoided clogging of sewage discharge pipelines, reduced waste of resources, and improved the economic benefits of the enterprise.
Smart Images
Figure CN222369595U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of screening equipment, and in particular relates to a vibrating sand and gravel aggregate screening equipment for a commercial mixing station. Background Art
[0002] Sand and gravel aggregates are the main building materials for structures such as concrete and masonry in civil engineering. Sand and gravel aggregates play a role of skeleton or filling in concrete, which can reduce the shrinkage of concrete. Aggregates with a particle size greater than 5 mm are called coarse aggregates, such as gravel and pebbles we often say, and aggregates with a particle size less than 5 mm are called fine aggregates, such as fine sand we often say. In concrete production, the role of fine sand is to fill the gaps between coarse aggregates such as gravel and pebbles to increase the strength of concrete. By selecting appropriate aggregate specifications and aggregate grading, concrete with special functions can be prepared. Good sand and gravel aggregate grading can also save the amount of cement in concrete.
[0003] The cleaning of commercial concrete tank trucks, the cleaning of commercial concrete mainframes, and the cleaning of on-site sites will all generate waste concrete aggregates. At the same time, the remaining and returned materials during the use of concrete will also generate a large amount of waste sand and gravel aggregates. These waste concrete sand and gravel aggregates cannot be used directly. If these waste materials are directly discarded, it will not only cause losses to the company, but also pollute the environment. However, through the sand and gravel aggregate cleaning and separation system, these waste sand and gravel aggregates can be recovered and reused in concrete production, thereby improving the economic benefits of the company.
[0004] Sand and gravel screening equipment is the core equipment of the concrete recycling system, and its role in green commercial concrete mixing plants is becoming more and more important. The sand and gravel separator can also be called a concrete sand and gravel separator. It can clean and separate the sewage used to clean the tank truck and the sand and gravel in the concrete, so as to achieve recycling. It is an essential equipment that meets the continuous production of modern large-scale green commercial mixing plants, which helps to save resources and protect the environment, and can also help enterprises achieve economic benefits. Existing sand and gravel screening equipment is generally divided into spiral type, drum type and vibration type screening equipment, which have different screening effects, but none of them can recycle the fine sand in the sewage after cleaning and screening of sand and gravel aggregates, nor can they screen and clean the raw materials of sand and gravel aggregates. If the fine sand in the sewage cannot be recycled, it will cause the sewage discharge pipeline to be blocked, resulting in a waste of resources.
[0005] Therefore, we propose a vibrating sand and gravel aggregate screening equipment for a commercial mixing station to solve the above technical problems. Utility Model Content
[0006] In order to solve the technical problem that the sand and gravel screening equipment in the above-mentioned prior art cannot recycle the sand in the sewage, which will cause the sewage discharge pipeline to be blocked and cause waste of resources, the utility model proposes a vibrating sand and gravel aggregate screening equipment for a commercial mixing station.
[0007] The technical solution adopted by the utility model is as follows:
[0008] A vibrating sand and gravel aggregate screening equipment for a commercial mixing station comprises an equipment support and a multi-stage vibrating screen assembly, wherein the multi-stage vibrating screen assembly is installed above the equipment support and can screen sand and gravel aggregates multiple times, a sewage collection box and a sand-water separation mechanism are arranged inside the equipment support, the sewage collection box is connected to a feed pump, the water outlet end of the feed pump extends into the equipment support, the sand-water separation mechanism comprises a separation cylinder and a sand-water separation assembly, the separation cylinder is obliquely installed in the equipment support and is located above the sewage collection box, a feed port and a slurry water outlet are respectively arranged at the upper and lower ends of the lower side of the separation cylinder, the feed port is located below the water outlet end of the feed pump, the slurry water outlet is located above the sewage collection box, a sand outlet is arranged below the higher side of the separation cylinder, the sand outlet is located outside the equipment support, the sand-water separation assembly is installed in the separation cylinder and can transport the screened material upward to the sand outlet.
[0009] By adopting the above technical scheme, the waste materials of the commercial concrete mixing station mainly include site flushing sewage, commercial concrete mixing station main machine cleaning sewage, tank truck cleaning sewage and concrete return waste. By installing the screening equipment in the appropriate work site of the commercial concrete mixing station, ensuring that the equipment support is installed firmly and horizontally, and then running the equipment, the waste materials of the commercial concrete mixing station are poured into the multi-stage vibrating screen assembly, and washed with clean water at the same time, the sand and gravel aggregates of different particle sizes are fully separated, and the water and smaller sand fall into the sewage collection box below, and then the sewage in the sewage collection box is pumped into the feed port of the separation cylinder through the feed pump. At this time, the sand and water mixture is transported upward under the propulsion of the sand and water separation component, and the water is retained at the slurry water outlet under the action of gravity, and then returns to the sewage collection box. The sand is transported to the sand outlet under the propulsion of the sand and water separation component, so that the sand is effectively recovered, and the blockage of the sewage discharge pipeline is also avoided. The utility model can efficiently process the waste materials of the commercial mixing station through the combination of the multi-stage vibrating screen component and the sand-water separation mechanism, realize the full recycling of the waste sand and gravel aggregates, reduce the waste of resources and improve the economic benefits of the enterprise.
[0010] In a further technical solution, the multi-stage vibrating screen assembly includes a screening hopper, a vibration motor and a buffer bracket. At least two screens are elastically connected in the screening hopper, and the screening particle size of the screens decreases from top to bottom. The screening hopper is provided with a discharge port on the lower side of the screen. The vibration motor is installed on the screening hopper, and the screening hopper is elastically connected to the equipment support through the buffer bracket.
[0011] By adopting the above technical scheme, through the sieves arranged up and down with the screening particle size decreasing successively, and the vibration motor directly installed on the screening hopper, it can ensure that sand and gravel aggregates of different particle sizes are fully separated, and the screening hopper is connected to the equipment support through a buffer bracket, which effectively reduces the impact of vibration on the equipment support and the surrounding environment, reduces the equipment operation noise, improves the stability and durability of the equipment, and extends the service life of the equipment.
[0012] In a further technical solution, buffer brackets are installed around the screening hopper, and the buffer brackets include an upper connecting plate, a lower connecting plate and a spring. The upper connecting plate is connected to the screening hopper, the lower connecting plate is connected to the equipment support, and the two ends of the spring are respectively connected to the upper connecting plate and the lower connecting plate.
[0013] By adopting the above technical solution, the buffer bracket is installed around the screening hopper through the cooperation of the upper connecting plate, the lower connecting plate and the spring, which can effectively absorb and buffer the vibration generated by the vibration motor during operation, reduce the impact of vibration on the equipment support and the overall structure, and improve the stability of the equipment.
[0014] In a further technical solution, the sand and water separation assembly includes a rotating shaft, a mounting plate and a servo motor. The rotating shaft can be rotatably installed in a separation cylinder. A spiral blade is provided on the outer wall of the rotating shaft. One end of the rotating shaft passes through the separation cylinder and is connected to the output shaft of the servo motor. The mounting plate is connected to the separation cylinder, and the servo motor is installed on the mounting plate.
[0015] By adopting the above technical solution, the sand-water separation component drives the shaft to rotate through the servo motor, and the spiral blades transport the sand-water mixture upward, thereby achieving effective separation of sand and water, ensuring high sand recovery efficiency and reducing resource waste.
[0016] In a further technical solution, the water outlet end of the feed pump is connected to a hydrocyclone, and the sand outlet of the hydrocyclone extends into the feed inlet.
[0017] By adopting the above technical scheme, the water outlet of the feed pump is connected to the hydrocyclone. The hydrocyclone uses the centrifugal force principle to separate water and sand. The separated fine sand flows from the outlet of the hydrocyclone into the feed port of the separation cylinder and is output by the sand-water separation component for recycling, which reduces the processing load in the separation cylinder, improves the processing efficiency of the overall equipment, enables the equipment to process more waste materials, and adapts to the high-intensity work requirements of commercial mixing stations.
[0018] In a further technical solution, a raw material cleaning mechanism is also included, which includes a storage bin and a belt conveyor. The loading end of the belt conveyor is arranged below the bin door of the storage bin, and the unloading end of the belt conveyor is located above the multi-stage vibrating screen assembly.
[0019] By adopting the above technical scheme, by setting up a raw material cleaning mechanism, when the raw materials of sand and gravel aggregate need to be cleaned and screened, the dump truck loaded with the raw materials of sand and gravel aggregate is reversed to the front of the storage bin, and the raw materials of sand and gravel aggregate are poured into the storage bin for temporary storage, and then the equipment is operated, the storage bin opens the bin door to transport the raw materials of sand and gravel aggregate to the belt conveyor, and the belt conveyor then transports the raw materials of sand and gravel aggregate to the multi-layer vibrating screen assembly for cleaning and screening, thereby improving the quality of sand and gravel aggregate required for concrete production and improving the market competitiveness and economic benefits of the products.
[0020] In a further technical solution, a vibrating feeder is provided between the silo door and the feeding end of the belt conveyor.
[0021] By adopting the above technical scheme, the release speed of the sand and gravel aggregate raw materials in the storage bin is controlled by the vibrating feeder, so that the sand and gravel aggregate raw materials can be more evenly distributed on the belt conveyor during the transportation process, ensuring the stable operation and uniform feeding of the belt conveyor.
[0022] In a further technical solution, the storage silo is installed in a pit below ground level.
[0023] By adopting the above technical solution, the storage bin is installed in a pit below the zero level of the ground, ensuring that the dump truck loaded with sand and gravel aggregate raw materials can complete unloading into the storage bin at zero level on the ground, which is convenient for use.
[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0025] 1. The utility model can efficiently process the waste materials of commercial mixing stations through the combination of multi-stage vibrating screen components and sand-water separation mechanisms, so that sand and gravel aggregates of different particle sizes can be fully separated, avoiding the blockage of sewage discharge pipelines, realizing the full recycling of waste sand and gravel aggregates, reducing resource waste, and improving the economic benefits of the enterprise.
[0026] 2. The utility model can reduce the processing load in the separation cylinder through the application of the hydrocyclone, improve the processing efficiency of the overall equipment, enable the equipment to process more waste materials, and adapt to the high-intensity work requirements of the commercial mixing station.
[0027] 3. The utility model is provided with a raw material cleaning mechanism and a vibrating feeder, which can realize uniform feeding and cleaning of sand and gravel aggregate raw materials, improve the quality of sand and gravel aggregate required for concrete production, and enhance the market competitiveness and economic benefits of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0029] Figure 1 It is a schematic diagram of the structure of the utility model;
[0030] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A;
[0031] Figure 3 It is a structural schematic diagram of another direction of the utility model;
[0032] Figure 4 It is a schematic diagram of the internal structure of the equipment support of the utility model;
[0033] Figure 5 It is a structural schematic diagram of the raw material cleaning mechanism of the utility model.
[0034] Figure markings: 1-equipment support, 2-wastewater collection box, 3-feed pump, 4-separation cylinder, 5-feed port, 6-slurry outlet, 7-sand outlet, 8-screening hopper, 9-vibration motor, 10-buffer bracket, 101-upper connecting plate, 102-lower connecting plate, 103-spring, 11-screen, 12-discharge port, 13-rotating shaft, 14-mounting plate, 15-servo motor, 16-spiral blade, 17-hydrocyclone, 18-storage silo, 19-belt conveyor, 20-vibrating feeder. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] Embodiment 1:
[0037] See also Figure 1 and Figure 4The present embodiment provides a vibrating sand and gravel aggregate screening equipment for a commercial mixing station, comprising an equipment support 1 and a multi-stage vibrating screen assembly, the multi-stage vibrating screen assembly is installed above the equipment support 1 and can screen the sand and gravel aggregate multiple times, a sewage collection box 2 and a sand-water separation mechanism are arranged inside the equipment support 1, the sewage collection box 2 is connected with a feed pump 3, the water outlet end of the feed pump 3 extends into the equipment support 1, the sand-water separation mechanism comprises a separation cylinder 4 and a sand-water separation assembly, the separation cylinder 4 is obliquely installed in the equipment support 1 and is located above the sewage collection box 2, a feed port 5 and a slurry outlet 6 are respectively arranged at the upper and lower ends of the lower side of the separation cylinder 4, the feed port 5 is located below the water outlet end of the feed pump 3, the slurry outlet 6 is located above the sewage collection box 2, a sand outlet 7 is arranged below the higher side of the separation cylinder 4, the sand outlet 7 is located outside the equipment support 1, the sand-water separation assembly is installed in the separation cylinder 4 and can transport the screened material upward to the sand outlet 7.
[0038] Specifically, the waste materials of the commercial concrete mixing station mainly include site flushing sewage, commercial concrete mixing station host cleaning sewage, tanker cleaning sewage and concrete return waste. By installing the screening equipment in an appropriate work site of the commercial concrete mixing station, ensuring that the equipment support 1 is installed firmly and horizontally, and then running the equipment, the waste materials of the commercial concrete mixing station are poured into the multi-stage vibrating screen assembly, and washed with clean water at the same time. Sand and gravel aggregates of different particle sizes are fully separated, and water and smaller sand fall into the sewage collection box 2 below, and then the sewage in the sewage collection box 2 is pumped into the feed port 5 of the separation cylinder 4 through the feed pump 3. At this time, the sand and water mixture is transported upward under the propulsion of the sand and water separation assembly, and the water is retained at the slurry water outlet 6 under the action of gravity, and then returns to the sewage collection box 2. The sand is transported to the sand outlet 7 under the propulsion of the sand and water separation assembly, so that the sand is effectively recovered, and the blockage of the sewage discharge pipeline is also avoided. The utility model can efficiently process the waste materials of the commercial mixing station through the combination of the multi-stage vibrating screen component and the sand-water separation mechanism, realize the full recycling of the waste sand and gravel aggregates, reduce the waste of resources and improve the economic benefits of the enterprise.
[0039] In this embodiment, see Figure 1 , Figure 2 and Figure 3 The multi-stage vibrating screen assembly includes a screening hopper 8, a vibration motor 9 and a buffer bracket 10. The screening hopper 8 is elastically connected inside. The screening hopper 8 is provided with a discharge port 12 on the lower side of the screen 11. The vibration motor 9 is installed on the screening hopper 8. The screening hopper 8 is elastically connected to the equipment support 1 through the buffer bracket 10.
[0040] Specifically, by arranging the sieves 11 up and down and with successively decreasing screening particle sizes, and cooperating with the vibration motor 9 directly installed on the screening hopper 8, it can be ensured that sand and gravel aggregates of different particle sizes are fully separated, and the screening hopper 8 is connected to the equipment support 1 through the buffer bracket 10, which effectively reduces the impact of vibration on the equipment support 1 and the surrounding environment, reduces the equipment operation noise, improves the stability and durability of the equipment, and extends the service life of the equipment.
[0041] In this embodiment, see Figure 2 and Figure 3 , buffer brackets 10 are installed around the screening hopper 8, and the buffer bracket 10 includes an upper connecting plate 101, a lower connecting plate 102 and a spring 103. The upper connecting plate 101 is connected to the screening hopper 8, the lower connecting plate 102 is connected to the equipment support 1, and the two ends of the spring 103 are respectively connected to the upper connecting plate 101 and the lower connecting plate 102.
[0042] Specifically, the buffer bracket 10 cooperates with the upper connecting plate 101, the lower connecting plate 102 and the spring 103, and the buffer bracket 10 is installed around the screening hopper 8. It can effectively absorb and buffer the vibration generated by the vibration motor 9 during operation, reduce the impact of the vibration on the equipment support 1 and the overall structure, and improve the stability of the equipment.
[0043] In this embodiment, see Figure 4 The sand-water separation assembly includes a rotating shaft 13, a mounting plate 14 and a servo motor 15. The rotating shaft 13 can be rotatably mounted in the separation cylinder 4. A spiral blade 16 is provided on the outer wall of the rotating shaft 13. One end of the rotating shaft 13 passes through the separation cylinder 4 and is connected to the output shaft of the servo motor 15. The mounting plate 14 is connected to the separation cylinder 4, and the servo motor 15 is mounted on the mounting plate 14.
[0044] Specifically, the sand-water separation component drives the rotating shaft 13 to rotate through the servo motor 15, and the spiral blades 16 transport the sand-water mixture upward, thereby achieving effective separation of sand and water, ensuring high sand recovery efficiency, and reducing resource waste.
[0045] Embodiment 2:
[0046] This embodiment is obtained by further optimizing the embodiment 1. Figure 3 and Figure 4 The water outlet end of the feed pump 3 is connected to a hydrocyclone 17 , and the sand outlet 7 of the hydrocyclone 17 extends into the feed inlet 5 .
[0047] Specifically, the water outlet of the feed pump 3 is connected to the hydrocyclone 17, and the hydrocyclone 17 uses the centrifugal force principle to separate water and sand. The separated fine sand flows into the feed port 5 of the separation drum 4 from the discharge port of the hydrocyclone 17, and is output by the sand-water separation component for recycling, thereby reducing the processing load in the separation drum 4, improving the processing efficiency of the overall equipment, and enabling the equipment to process more waste materials and meet the high-intensity work requirements of the commercial mixing station.
[0048] Embodiment 3:
[0049] This embodiment is obtained by further optimizing on the basis of Embodiment 1 or Embodiment 2. In this embodiment, refer to Figure 5 , and also includes a raw material cleaning mechanism, which includes a storage bin 18 and a belt conveyor 19, the loading end of the belt conveyor 19 is arranged below the bin door of the storage bin 18, and the unloading end of the belt conveyor 19 is located above the multi-stage vibrating screen assembly.
[0050] Specifically, by setting up a raw material cleaning mechanism, when the raw materials of sand and gravel aggregate need to be cleaned and screened, the dump truck loaded with the sand and gravel aggregate raw materials is reversed to the storage bin 18, and the sand and gravel aggregate raw materials are poured into the storage bin 18 for temporary storage, and then the equipment is operated, and the storage bin 18 opens the bin door to transport the sand and gravel aggregate raw materials to the belt conveyor 19, and the belt conveyor 19 then transports the sand and gravel aggregate raw materials to the multi-layer vibrating screen assembly for cleaning and screening, thereby improving the quality of sand and gravel aggregate required for concrete production, and improving the market competitiveness and economic benefits of the products.
[0051] In this embodiment, a vibrating feeder 20 is provided between the door of the storage bin 18 and the feeding end of the belt conveyor 19 .
[0052] Specifically, the release speed of the sand and gravel aggregate raw materials in the storage bin 18 is controlled by the vibrating feeder 20, so that the sand and gravel aggregate raw materials can be more evenly distributed on the belt conveyor 19 during the transportation process, ensuring the stable operation and uniform feeding of the belt conveyor 19.
[0053] In this embodiment, the storage bin 18 is installed in a pit below the ground level.
[0054] Specifically, by installing the storage bin 18 in a pit below the ground level zero, it is ensured that a dump truck loaded with sand and gravel aggregate raw materials can complete unloading into the storage bin 18 at zero ground level, which is convenient for use.
[0055] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A vibrating sand and gravel aggregate screening equipment for a commercial mixing station, characterized in that: The invention comprises an equipment support (1) and a multi-stage vibrating screen assembly, wherein the multi-stage vibrating screen assembly is installed above the equipment support (1) and can screen sand and gravel aggregates multiple times, wherein a sewage collection box (2) and a sand-water separation mechanism are provided inside the equipment support (1), wherein the sewage collection box (2) is connected to a feed pump (3), wherein the water outlet end of the feed pump (3) extends into the equipment support (1), and wherein the sand-water separation mechanism comprises a separation cylinder (4) and a sand-water separation assembly, wherein the separation cylinder (4) is installed obliquely in the equipment support (1) and is located Above the sewage collection box (2), a feed port (5) and a slurry water outlet (6) are respectively provided at the upper and lower ends of the lower side of the separation cylinder (4), the feed port (5) is located below the water outlet of the feed pump (3), the slurry water outlet (6) is located above the sewage collection box (2), and a sand outlet (7) is provided below the upper side of the separation cylinder (4), the sand outlet (7) is located outside the equipment support (1), and the sand and water separation component is installed in the separation cylinder (4) and can transport the screened material upward to the sand outlet (7).
2. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 1 is characterized in that: The multi-stage vibrating screen assembly comprises a screening hopper (8), a vibration motor (9) and a buffer bracket (10); at least two screens (11) are elastically connected in the screening hopper (8), and the screening particle size of the screens (11) decreases from top to bottom; the screening hopper (8) is provided with a discharge port (12) on the lower side of the screen (11); the vibration motor (9) is mounted on the screening hopper (8); and the screening hopper (8) is elastically connected to the equipment support (1) via the buffer bracket (10).
3. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 2, characterized in that: Buffer brackets (10) are installed around the screening hopper (8), and the buffer bracket (10) comprises an upper connecting plate (101), a lower connecting plate (102) and a spring (103). The upper connecting plate (101) is connected to the screening hopper (8), the lower connecting plate (102) is connected to the equipment support (1), and the two ends of the spring (103) are respectively connected to the upper connecting plate (101) and the lower connecting plate (102).
4. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 1, characterized in that: The sand-water separation assembly comprises a rotating shaft (13), a mounting plate (14) and a servo motor (15); the rotating shaft (13) is rotatably mounted in a separation cylinder (4); a spiral blade (16) is provided on the outer wall of the rotating shaft (13); one end of the rotating shaft (13) passes through the separation cylinder (4) and is connected to an output shaft of the servo motor (15); the mounting plate (14) is connected to the separation cylinder (4); and the servo motor (15) is mounted on the mounting plate (14).
5. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 1, characterized in that: The water outlet end of the feed pump (3) is connected to a hydrocyclone (17), and the outlet of the hydrocyclone (17) extends into the feed inlet (5).
6. A vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to any one of claims 1 to 5, characterized in that: The invention also comprises a raw material cleaning mechanism, which comprises a storage bin (18) and a belt conveyor (19), wherein the loading end of the belt conveyor (19) is arranged below the bin door of the storage bin (18), and the unloading end of the belt conveyor (19) is located above the multi-stage vibrating screen assembly.
7. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 6, characterized in that: A vibrating feeder (20) is provided between the door of the storage bin (18) and the feeding end of the belt conveyor (19).
8. The vibrating sand and gravel aggregate screening equipment for a commercial concrete mixing station according to claim 6, characterized in that: The storage bin (18) is installed in a pit below the ground level.