Aggregate air cooling and accurate batching integrated device for concrete mixing plant

Abstract

The utility model belongs to the technical field of water conservancy and hydropower engineering and water transportation construction auxiliary enterprises, and particularly relates to a device for integrating air cooling and accurate batching of aggregate in a concrete mixing plant. The device at least comprises a mixing plant weighing system, a closed steel structure stock bin mechanism, an air cooling system and a discharging sealing-tape machine, the closed steel structure stock bin mechanism comprises a plurality of aggregate stock bins and sand stock bins; the closed steel structure stock bin is connected to a weighing system of the mixing plant; the air cooling system is arranged outside the aggregate storage bin, communicates with the aggregate storage bin and is used for cooling the aggregate in the aggregate storage bin; and the discharging sealing-tape machine is arranged right below the weighing system of the mixing plant. The utility model can effectively solve the problem that the conventional mixing plant cannot produce precooled concrete, and reduces the link of unloading coarse aggregate. The unit energy consumption is low, the equipment integration degree and the automation degree are high, the construction land can be greatly reduced, and the production and operation cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering and water transport construction auxiliary enterprises, and specifically relates to a device for integrating aggregate air cooling and precise batching in a concrete mixing station. Background Art

[0002] In large-volume concrete construction, concrete temperature cracks are caused by factors such as concrete pouring area, volume, concrete hydration heat, external constraints and concrete physical properties, among which temperature change is the main factor. Pre-cooling concrete pouring and lowering the pouring temperature can achieve good results in reducing temperature stress, reducing cracks and enhancing later strength.

[0003] The existing concrete pre-cooling measures include coarse aggregate air cooling, flake ice, cold water mixing, etc. Among them, coarse aggregate air cooling is one of the main measures to reduce the temperature of concrete outlet. The weighing system of the conventional mixing station is an open hopper, with a weighing device under the hopper for batching, and a loader is used to feed the hopper. The production efficiency is low and the coarse aggregate cannot be cooled, thus failing to meet the production needs of pre-cooled concrete.

[0004] At present, the main means of air cooling of coarse aggregate is to set up a primary air cooling silo on the ground (the role of the transfer silo), and to achieve temperature control of coarse aggregate by setting up an air cooling circulation device outside the silo; air cooling measures can also be taken for coarse aggregate in the supporting silo on the mixing building. The above two methods are mainly used in the pre-cooling concrete system of the mixing building; how to apply pre-cooling concrete production to the mixing plant requires solving the cooling problem of coarse aggregate in the production system of the mixing plant. Utility Model Content

[0005] The utility model provides a device for integrating air cooling and precise batching of aggregates in a concrete mixing station, and its purpose is to provide a device that can effectively solve the problem that conventional mixing stations cannot produce pre-cooled concrete, reduce the coarse aggregate transfer link, reduce unit energy consumption, have high equipment integration and automation, and can greatly reduce construction land and reduce production and operation costs.

[0006] The technical solution adopted by the utility model is:

[0007] A device for integrating air cooling and precise batching of aggregates in a concrete mixing station comprises at least a mixing station weighing system, and also comprises a closed steel structure silo mechanism, an air cooling system and a discharging belt conveyor; the closed steel structure silo mechanism comprises a plurality of aggregate silos and a sand silo; the closed steel structure silo is connected to the mixing station weighing system; the air cooling system is arranged outside the aggregate silo and communicated with the aggregate silo for cooling the aggregates in the aggregate silo; the discharging belt conveyor is placed directly below the mixing station weighing system.

[0008] The closed steel structure silo mechanism is arranged horizontally, and its lower part is a funnel-shaped rectangular cross-section steel structure, and its inner cavity is divided into a plurality of aggregate silos and sand silos by vertically arranged partitions.

[0009] The main beam of the closed steel structure silo mechanism is an I-beam, the upper part of which is a rectangular steel structure and the lower part is a frustoconical steel structure; connection holes for connecting to the air cooling system are respectively opened above and below the side where the aggregate silo is connected to the air cooling system; the top surface of the closed steel structure silo mechanism is a steel plate, and stiffening ribs are arranged on both sides of the steel plate, and the stiffening ribs are made of angle steel; a drop hole is reserved in the middle of the top steel plate corresponding to each aggregate silo and sand silo; the frustoconical steel structure at the bottom is composed of a trapezoidal steel plate, and angle steel ribs are connected to the steel plate, and the bottom surface of the steel structure silo mechanism is connected to the weighing system of the mixing station.

[0010] The air cooling system comprises a refrigeration container and a plurality of air supply and return mechanisms; the number of the air supply and return mechanisms matches the number of aggregate silos; and each air supply and return mechanism is respectively connected to the refrigeration container.

[0011] The air supply and return mechanism includes a cold air part and a return air part; the air outlet end of the cold air part is connected to the lower part of the aggregate silo side wall, the air inlet end of the cold air part is connected to the air outlet end of the return air part, and the air inlet end of the return air part is connected to the upper part of the aggregate silo side wall.

[0012] The cold air unit includes a refrigeration container, an air inlet pipe, an air cooler, a motor and an air inlet duct; the motor is electrically connected to the air cooler to power the air cooler; the air cooler is connected to the aggregate silo through the air inlet pipe; the refrigeration container is connected to the air cooler to supply liquid to the air cooler and produce cold air; the air inlet duct is horizontally arranged in a closed steel structure silo mechanism and is connected to the air inlet pipe.

[0013] The refrigeration container at least comprises a shell, a refrigeration compressor and supporting auxiliary equipment; the refrigeration compressor and supporting auxiliary equipment are connected in the shell; and the refrigeration compressor is connected to the air cooler.

[0014] The return air part includes a return air duct, an air cooler and a return air duct; the air cooler is connected to the aggregate bin through the return air duct, and is connected to the cold air part through the air cooler; the return air duct is horizontally arranged in the closed steel structure bin mechanism and is connected to the return air duct.

[0015] Three aggregate bins are provided; two sand bins are provided; the three aggregate bins are adjacently arranged in a straight line; and two sand bins are adjacently arranged on the left and right sides of the aggregate bin.

[0016] Beneficial effects:

[0017] (1) The utility model organically combines a steel structure aggregate silo with a weighing system, an air cooling system, and a discharging belt conveyor, thereby realizing an integrated device for belt conveyor mechanical feeding, air cooling of coarse aggregate, and precise batching.

[0018] (2) The utility model can effectively solve the problem that conventional mixing plants cannot produce pre-cooled concrete, and reduces the coarse aggregate transfer link.

[0019] (3) The utility model has low unit energy consumption, high equipment integration and automation, which can significantly reduce construction land and reduce production and operation costs.

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is the plan layout diagram of the utility model.

[0023] Figure 2 for Figure 1 Middle AA section view.

[0024] Figure 3 for Figure 1 Middle BB section view.

[0025] In the figure: 1. Aggregate silo; 2. Gate valve; 3. Pneumatic arc gate; 4. Weighing device; 5. Weighing bucket; 6. Discharging arc gate; 7. Discharging belt conveyor; 8. Air inlet duct; 9. Air cooler; 10. Motor; 11. Return air duct; 12. Air cooler; 13. Air inlet duct; 14. Return air duct; 15. Refrigeration container; 16. Sand silo; 17. Feeding area; 18. Cooling area; 19. Storage area. DETAILED DESCRIPTION

[0026] 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.

[0027] Embodiment 1:

[0028] according to Figure 1-Figure 3 The device shown is used for integrating air cooling and precise batching of aggregates in a concrete mixing station, which includes at least a mixing station weighing system, and also includes a closed steel structure silo mechanism, an air cooling system and a discharging belt conveyor 7; the closed steel structure silo mechanism includes a plurality of aggregate silos 1 and a sand silo 16; the closed steel structure silo is connected to the mixing station weighing system; the air cooling system is arranged outside the aggregate silo 1 and is connected to the aggregate silo 1, and is used to cool the aggregate in the aggregate silo 1; the discharging belt conveyor 7 is placed directly below the mixing station weighing system.

[0029] In actual use, the mixing station weighing system in this embodiment adopts the existing technology, which at least includes a gate valve 2, a pneumatic arc gate 3, a weighing device 4, a weighing bucket 5 and a discharge arc gate 6; the reception, weighing and discharge of the cooled coarse aggregate are realized through the cooperation of the gate valve 2, the pneumatic arc gate 3, the weighing device 4, the weighing bucket 5 and the discharge arc gate 6.

[0030] In this embodiment, an air cooling system is arranged outside the aggregate bin 1 , and a continuous air cooling circulation system is formed between the air cooling system and the aggregate bin 1 .

[0031] In specific application, the cold air from the air cooling system is fed into the bottom of the aggregate bin 1, flows in the direction of the aggregate, passes through the aggregate layer in the area, absorbs heat and heats up, and then returns to the air cooling system from the upper part of the aggregate bin 1 for cooling. The cooled cold air returns to the aggregate bin 1 for the next cooling cycle. The coarse aggregate is cooled under the continuous circulation of the cold air, and enters the storage area 19 after the temperature drops to the required final temperature. The aggregate flows from top to bottom in the bin 1, and the cold air flows from bottom to top in the aggregate bin 1, and performs countercurrent heat exchange with the aggregate. The cooling of the aggregate is continuous air cooling, and the cold air is a closed-loop cycle.

[0032] The utility model combines a steel structure aggregate bin with a weighing system and an air cooling system to realize an integrated device of belt conveyor mechanical feeding, air cooling of coarse aggregate and precise batching.

[0033] The utility model can effectively solve the problem that conventional mixing stations cannot produce pre-cooled concrete, and reduces the coarse aggregate transfer link.

[0034] The utility model has low unit energy consumption, high equipment integration and automation, can greatly reduce construction land, and reduce production and operation costs.

[0035] Embodiment 2:

[0036] according to Figure 1-Figure 3 The device shown is used for integrating air cooling and precise batching of aggregates in a concrete mixing station. It is different from the first embodiment in that the closed steel structure silo mechanism is arranged horizontally, and its lower part is a funnel-shaped rectangular cross-section steel structure, and its inner cavity is divided into multiple aggregate silos 1 and sand silos 16 by vertically arranged partitions.

[0037] Furthermore, the main beam of the closed steel structure silo mechanism is an I-beam, the upper part of which is a rectangular steel structure and the lower part is a conical steel structure; connection holes for connecting to the air cooling system are respectively opened on the upper and lower sides of the side where the aggregate silo 1 is connected to the air cooling system; the top surface of the closed steel structure silo mechanism is a steel plate, and stiffening ribs are arranged on both sides of the steel plate, and the stiffening ribs are made of angle steel; a drop hole is reserved in the middle of the top steel plate corresponding to each aggregate silo 1 and sand silo 16; the lower conical steel structure is composed of a trapezoidal steel plate, and angle steel ribs are connected to the steel plate, and the bottom surface of the steel structure silo mechanism is connected to the mixing station weighing system.

[0038] In actual use, the closed steel structure silo mechanism adopts the above technical solution, which can not only reasonably divide the aggregate silo 1 and the sand silo 16, but also can be conveniently connected to the air cooling system, so as to cool and reduce the temperature of the coarse aggregate entering the aggregate silo 1 to reach the expected temperature and meet the construction requirements.

[0039] Embodiment three:

[0040] according to Figure 1-Figure 3 The device shown is used for integrating air cooling and precise batching of aggregates in a concrete mixing station. The difference from the first embodiment is that: the air cooling system includes a refrigeration container 15 and a plurality of supply and return air mechanisms; the number of the supply and return air mechanisms matches the number of aggregate silos 1; and each supply and return air mechanism is respectively connected to the refrigeration container 15.

[0041] Furthermore, the air supply and return mechanism includes a cold air part and a return air part; the air outlet end of the cold air part is connected to the lower part of the side wall of the aggregate silo 1, the air inlet end of the cold air part is connected to the air outlet end of the return air part, and the air inlet end of the return air part is connected to the upper part of the side wall of the aggregate silo 1.

[0042] Furthermore, the cold air unit includes a refrigeration container 15, an air inlet pipe 8, an air cooler 9, a motor 10 and an air inlet duct 13; the motor 10 is electrically connected to the air cooler 9 for supplying power to the air cooler 9; the air cooler 9 is connected to the aggregate silo 1 through the air inlet pipe 8; the refrigeration container 15 is connected to the air cooler 9 to supply liquid to the air cooler 9 and produce cold air; the air inlet duct 13 is horizontally arranged in the closed steel structure silo mechanism and is connected to the air inlet pipe 8.

[0043] Furthermore, the refrigeration container 15 at least includes a shell, a refrigeration compressor and supporting auxiliary equipment; the refrigeration compressor and the supporting auxiliary equipment are connected in the shell; and the refrigeration compressor is connected to the air cooler 9.

[0044] Furthermore, the return air part includes a return air duct 11, an air cooler 12 and a return air duct 14; the air cooler 12 is connected to the aggregate silo 1 through the return air duct 11, and is connected to the cold air part through the air cooler 12; the return air duct 14 is horizontally arranged in the closed steel structure silo mechanism, and is connected to the return air duct 11.

[0045] In actual use, the return air duct 14 and the air inlet duct 13 are horizontally arranged in the closed steel structure silo mechanism, and the inner cavity of the closed steel structure silo mechanism is divided from top to bottom into a feeding area 17, a cold air cooling area 18 and a storage area 19. The cold air is sent in from the bottom of the closed steel structure silo mechanism, that is, the air inlet on the air inlet duct 13, and passes through the coarse aggregate layer in the cooling area 18 against the coarse aggregate flow direction to absorb heat and heat up. Then, it enters the air cooler 12 through the return air duct 11 from the air outlet on the return air duct 14 at the upper part of the cooling area 18 for cooling. The cooled cold air is pressed into the aggregate silo 1 through the air inlet duct 8 by the air cooler 9 for the next cooling cycle. The coarse aggregate is continuously circulated and cooled by the cold air, and enters the storage area 19 after the temperature drops to the required final temperature. The coarse aggregate flows from top to bottom in the aggregate bin 1, and the cold air flows from bottom to top in the aggregate bin 1 to perform countercurrent heat exchange with the coarse aggregate. The cooling of the coarse aggregate is continuous air cooling, and the cold air is a closed-loop circulation.

[0046] In specific applications, the volume of the sand silo 16 is combined with the plane size of the mixing station weighing system, and the total height is determined according to the sand storage. It can be set at the same height as the aggregate silo 1. The volume of the aggregate silo 1 is combined with the plane size of the mixing station weighing system. The height of the silo takes into account the heights of the feeding area 17, cooling area 18, and storage area 19 to determine the total height of the aggregate silo 1. The general straight section height is 10 to 12 meters. The feeding area 17 should ensure that the air inlet duct 13 is not exposed during the descent and replenishment of coarse aggregate to avoid air volume loss; the volume of the cooling area 18 should meet the storage time required for the cooling of coarse aggregate; the storage area 19 is to avoid the loss of cold air from the discharge port. The cross-sectional dimensions of the air inlet duct 13 and the return air duct 14 are determined according to the air volume and economic wind speed.

[0047] Embodiment 4:

[0048] according to Figure 1-Figure 3 The device shown is used for integrating air cooling and precise batching of aggregates in a concrete mixing station, which is different from the first embodiment in that: three aggregate bins 1 are provided; two sand bins 16 are provided; the three aggregate bins 1 are arranged adjacent to each other in a straight line; two sand bins 16 are arranged adjacent to each other on the left and right sides of the aggregate bin 1, so that the three aggregate bins 1 and the two sand bins 16 are arranged in a straight line.

[0049] In actual use, the number of aggregate bins 1 and sand bins 16 can be set according to actual needs.

[0050] The design of three aggregate silos 1 and two sand silos 16 can basically meet the requirements of aggregate air cooling and precise batching in a concrete mixing station.

[0051] In summary, the utility model organically combines the steel structure aggregate silo with the weighing system, air cooling system, and discharging belt conveyor, realizing an integrated device of belt conveyor mechanical feeding, air cooling of coarse aggregate, and precise batching. The utility model can effectively solve the problem that conventional mixing stations cannot produce pre-cooled concrete, and reduces the coarse aggregate transfer link. The utility model has low unit energy consumption, high equipment integration and automation, can greatly reduce construction land, and reduce production and operation costs.

[0052] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0055] The above is only a preferred embodiment of the utility model. The utility model will not be limited to these embodiments shown in this article, but should conform to the widest range consistent with the principles and novel features disclosed in this article. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. A device for integrating air cooling and precise batching of aggregates in a concrete mixing station, comprising at least a mixing station weighing system, characterized in that: It also comprises a closed steel structure silo mechanism, an air cooling system and a discharging belt conveyor (7); the closed steel structure silo mechanism comprises a plurality of aggregate silos (1) and a sand silo (16); the closed steel structure silo is connected to a mixing station weighing system; the air cooling system is arranged outside the aggregate silo (1) and is in communication with the aggregate silo (1) for cooling the aggregate in the aggregate silo (1); and the discharging belt conveyor (7) is placed directly below the mixing station weighing system.

2. A device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 1, characterized in that: The closed steel structure silo mechanism is arranged horizontally, and its lower part is a funnel-shaped rectangular cross-section steel structure, the inner cavity of which is divided into a plurality of aggregate silos (1) and sand silos (16) by vertically arranged partitions.

3. A device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 2, characterized in that: The main beam of the closed steel structure silo mechanism is an I-beam, the upper part of which is a rectangular steel structure and the lower part is a frustoconical steel structure; connection holes for connecting to the air cooling system are respectively provided at the upper and lower sides of the side where the aggregate silo (1) is connected to the air cooling system; the top surface of the closed steel structure silo mechanism is a steel plate, and ribs are provided on both sides of the steel plate, and the ribs are made of angle steel; a drop hole is reserved in the middle of the top steel plate corresponding to each aggregate silo (1) and sand silo (16); the frustoconical steel structure at the lower part is composed of a trapezoidal steel plate, and angle steel ribs are connected to the steel plate, and the bottom surface of the steel structure silo mechanism is connected to the mixing station weighing system.

4. The device for integrating air cooling and precise batching of aggregates in a concrete mixing station according to claim 1, characterized in that: The air cooling system comprises a refrigeration container (15) and a plurality of air supply and return mechanisms; the number of the air supply and return mechanisms matches the number of aggregate silos (1); and each air supply and return mechanism is connected to the refrigeration container (15) respectively.

5. The device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 4, characterized in that: The air supply and return mechanism comprises a cold air section and a return air section; the air outlet end of the cold air section is connected to the lower part of the side wall of the aggregate bin (1), the air inlet end of the cold air section is connected to the air outlet end of the return air section, and the air inlet end of the return air section is connected to the upper part of the side wall of the aggregate bin (1).

6. The device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 5, characterized in that: The cold air unit comprises a refrigeration container (15), an air inlet pipe (8), an air cooler (9), a motor (10) and an air inlet duct (13); the motor (10) is electrically connected to the air cooler (9) for supplying power to the air cooler (9); the air cooler (9) is connected to the aggregate silo (1) via the air inlet pipe (8); the refrigeration container (15) is connected to the air cooler (9) for supplying liquid to the air cooler (9) to produce cold air; the air inlet duct (13) is horizontally arranged in a closed steel structure silo mechanism and is connected to the air inlet pipe (8).

7. The device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 6, characterized in that: The refrigeration container (15) comprises at least a shell, a refrigeration compressor and supporting auxiliary equipment; the refrigeration compressor and supporting auxiliary equipment are connected inside the shell; and the refrigeration compressor is connected to a cooling fan (9).

8. The device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 5, characterized in that: The return air section comprises a return air pipe (11), an air cooler (12) and a return air duct (14); the air cooler (12) is connected to the aggregate bin (1) via the return air pipe (11), and is connected to the cold air section via the air cooler (12); the return air duct (14) is horizontally arranged in the closed steel structure bin mechanism, and is connected to the return air pipe (11).

9. A device for integrating air cooling and precise batching of aggregates in a concrete mixing station as claimed in claim 1 or 2, characterized in that: Three aggregate bins (1) are provided; two sand bins (16) are provided; the three aggregate bins (1) are arranged adjacent to each other in a straight line; and two sand bins (16) are arranged adjacent to each other on the left and right sides of the aggregate bin (1).

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