CN206765093U - A kind of environmentally friendly underground project dug underground concrete mixing plant - Google Patents

Abstract

The utility model discloses a concrete mixing station for an environment-friendly underground excavation project, which belongs to the field of mixing stations and comprises a storage device, a mixing main machine, a transmission device and an unloading device arranged below the ground and in a pit that is covered with a cover to form an underground sealed space. The material device, the storage yard and the feeding device arranged on the ground, the unloading device is set under the mixing main engine, and the unloading device directly communicates with the construction site through the transmission device. The aggregate bins correspond to the feeding devices one by one. The main equipment of this mixing plant is moved underground, which reduces the footprint of the mixing plant and eliminates high-altitude buildings and operations on the ground; and changes the input and output of materials. On the one hand, it can realize the horizontal or downward transportation of the initial materials. The material conveying distance is shortened, which not only increases the operating speed of the mixing plant, but also reduces the number of workers. On the other hand, the feeding device is used to transport sand and gravel aggregates to the aggregate bin, which has the characteristics of high efficiency and environmental protection.

Description

A concrete mixing station for environmental protection underground excavation engineering

technical field

The utility model belongs to the technical field of commercial concrete mixing stations, and in particular relates to a concrete mixing station for an environment-friendly underground underground excavation project.

Background technique

Concrete mixing station (building) is a joint device used to centrally mix concrete, also known as concrete prefabrication field. Due to its high degree of mechanization and automation, its productivity is also high, and it can ensure the quality of concrete and save cement. It is often used in large and medium-sized water conservancy, electric power, bridges and other projects with large concrete engineering volume, long construction period, and concentrated construction sites.

In the prior art, large-scale equipment such as concrete mixing plants (buildings), material storage devices, and mixing devices are relatively high on the ground. Although the tank trucks can be loaded with material by dropping, the powder tanks are built at high places, requiring For lifting and loading, aggregates such as sand and gravel require additional conveying devices to lift the materials to the inlet of the mixing machine. The lifting height is large and the air transmission distance is long, which brings more problems, mainly in the following aspects :

(1) It is difficult to isolate dust, noise and vibration;

(2) The production efficiency is low. The actual performance of a 3-square unit with a nominal capacity of 180 cubic meters per hour is often around 50%, that is, the actual production capacity is only 90-100 cubic meters;

(3) It occupies a large area and the cost of land use is relatively high;

(4) High energy consumption, high cost, unavoidable spillage of materials during the lifting process, and the need to equip multiple people for cleaning and maintenance, which increases the labor cost of the enterprise;

(5) There are many and tall buildings on the ground, with obvious industrial pollution signs, which are not in harmony with the surrounding environment of urban and rural construction planning, and the site selection range is small, making it difficult to supply materials nearby.

In general, the existing equipment is not conducive to energy saving and emission reduction, reducing energy consumption of enterprises and improving production efficiency. At the same time, it is also necessary to consider the problems of earthquake resistance and wind speed caused by the high height of the equipment, which leads to the limited shape and volume of each device, which greatly restricts the production capacity, popularization rate and regionalization of concrete mixing plants (buildings). .

In addition, underground excavation projects, such as subway tunnels and platforms, use a large amount of concrete continuously during the construction process, but the transportation capacity of existing concrete tank trucks is limited, and long-distance transportation is required to reach the designated location. There are many uncertain problems in the transportation process, such as traffic jams, breakdowns, etc., which in turn affect the construction of the project and greatly extend the construction period.

Utility model content

In view of this, the purpose of this utility model is to overcome the defects of the existing ground-type mixing plant (building), thereby providing an environmentally friendly concrete mixing plant for underground excavation projects to solve the need for uninterrupted large-scale use of concrete in underground projects.

In order to achieve the above object, the utility model provides the following technical solutions:

An environmentally friendly concrete mixing plant for underground excavation projects, including a storage yard, a storage device for storing materials, a mixing host connected to the storage device, and a transmission device, a discharge device, and a feeding device. The storage device, The main mixing machine, the unloading device and the conveying device are all arranged in the pit below the ground, the storage yard and the feeding device are all arranged on the ground, and the unloading device is set under the discharge port of the main mixing main machine. And the unloading device directly communicates the finished concrete with the construction site through the conveying device, and the feeding device corresponding to the plurality of aggregate bins of the storage device is provided in the storage yard.

Further, the conveying device is a conveying belt or a conveying pipe with a concrete conveying pump.

Further, the feeding device installed on the fixed bracket is inclined, and the angle between it and the horizontal plane is 35°-60°. The dust removal pipes of the feeding devices are connected with each other.

Further, a flap sealing door is provided at the feeding port at the upper end of the feeding device.

Further, a vibrating feeding trough is provided at the feeding port at the upper end of the feeding device, and a vibrating device and a sliding sealing door are provided on the vibrating feeding trough.

Further, the storage device also includes a powder silo, a water storage silo, and an additive silo. There are several powder silos arranged horizontally on one side of the mixing machine, and there are at least two aggregate silos. It is horizontally arranged on the other side of the mixing main engine next to the powder silo, the bottom of the aggregate silo is provided with a conveyor connected to the inlet of the mixing main engine, the water storage silo and the external The agent bin is arranged between the powder bin and the aggregate bin.

Further, the conveyor adopts a scraper conveyor or a belt conveyor, and its arrangement structure is a straight type or a bent type with a small inclination angle at one end connected to the mixing host, and the angle of the small inclination angle is equal to the horizontal It is 12°～16°.

Further, the powder silo includes a cement silo and a blending silo, a weighing system is arranged above the mixing main machine, and the discharge ends of the cement silo and each blending silo are connected to the weighing system through a conveying device ; The water storage bin and the admixture bin are connected to the weighing system through the control pipeline.

Further, the conveying device adopts a screw feeder or an air conveying chute.

Further, the mixing station also includes an electric control system arranged on the ground, which is electrically connected with the storage device, mixing host, conveying device, unloading device, feeding device, conveyor, weighing system, and conveying device.

The beneficial effects of the utility model are:

1. The utility model adopts the conveying device to convey the finished concrete outward, which has the characteristics of high timeliness and high efficiency, and greatly meets the demand for uninterrupted large-scale use of concrete in underground excavation projects; at the same time, it can be used according to the terrain, landform, Address, mountain conditions and other conditions, the adaptive adjustment of the conveying position, direction, length, height, etc. of the conveying device is conducive to enhancing the applicability of the mixing station.

2. The utility model adopts a feeding device to transport sand and gravel aggregates to the aggregate bin, so that each aggregate bin has a corresponding feeding device, which can prevent the sand and gravel aggregates of different specifications from the aggregate bin from being connected to each other. It can ensure the preparation of the aggregate ratio, thereby ensuring the effectiveness of the concrete; at the same time, the sand and gravel aggregates are dropped in a relatively closed space, which effectively avoids the problem of dust in the storage yard and is conducive to environmental protection.

3. The utility model also improves the overall technical content, popularization rate and regionality of the mixing station, and its production capacity can be increased by 20%-30%.

3. The utility model moves the main equipment underground, so that the main equipment can help the pit to form a solid closed space, which is not only beneficial to dust collection, but also can eliminate low-frequency vibration, reduce noise pollution, and realize the protection of pollution sources such as dust and noise. centralized control.

4. The utility model can modularize the mixing station so that it can form a mobile structure, and it can be arranged at intervals following the engineering process so that it can cover the needs of a certain range.

In general, the utility model uses the sealed pit to completely seal the mixing main machine and material transmission, completely solving environmental problems such as dust, noise, vibration, etc.; the utility model uses the sinking of the mixing main machine to realize material level and downward feeding, shortening the material transmission distance, Reduce the cost of material transportation and increase the conveying speed; the reasonable collocation and use of buffer warehouse technology in the discharge link prevents the mixing unit from stopping, which solves the bottleneck of the output speed of finished materials; greatly reduces the occupied area, saves land use costs, and improves land use efficiency ;Significantly reduce the number and height of buildings on the ground, reduce the adverse impact on the environment, avoid conflicts with urban and rural construction planning, expand the scope of optional sites for building stations, shorten the distance from the construction site for materials, realize the construction of nearby stations and ensure the surrounding Timely supply of materials at the construction site.

Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Learn from the practice of the invention. The objects and other advantages of the invention may be realized and attained by the following specification.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the utility model clearer, the utility model provides the following drawings for illustration:

Fig. 1 is the schematic plan view of the mixing station of the present utility model;

Fig. 2 is the I-I sectional view of Fig. 1;

Fig. 3 is the II-II sectional view of Fig. 1;

Fig. 4 is a III-III sectional view of Fig. 1;

Fig. 5 is a IV-IV sectional view of Fig. 1 .

detailed description

The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in the figure, an environmentally friendly concrete mixing plant for underground excavation projects provided in this embodiment includes a storage device arranged in a pit below the ground, a mixing host 1, a conveying device 2 and a discharge device 3, and a storage device arranged on the ground The storage yard 12 and the feeding device 12 on the top, the unloading device 3 is arranged under the mixing host 1, and the unloading device 3 directly communicates the finished concrete with the construction site through the transmission device, and the storage yard 12 is equipped with a storage device A plurality of aggregate bins 6 are respectively one-to-one corresponding to the feeding device 13 . This stirring host 1 can be bought on the market, and those skilled in the art can understand that the corresponding equipment that is used as stirring function can be used here; Including aggregate and powder or other raw materials that can be applied to the utility model for obtaining concrete; the conveying device 2 is arranged in the pit 4, and one end is connected to the discharge device 3 below the discharge port of the mixing main engine 1 connected, and the other end extends to the construction site. In this way, based on the principle of the nearest arrangement, the mixing plant can be moved along with the underground works, eliminating the need for concrete tanker transportation between the mixing plant and the construction site, effectively improving the effectiveness and efficiency of the mixing plant, and reducing the Energy consumption, reducing the impact of a large number of concrete tank trucks on the road blockage and the surrounding environment.

With the above scheme, the storage device is used to store various materials, and it is located in the pit on the ground together with the mixing host, and the materials on the ground can be conveyed downward; that is, the materials are transported to the storage device, and the materials are transported to the In the storage bins in the storage device, the lifting process is omitted during the conveying process, which reduces the difficulty of feeding and the energy consumption of feeding; and by completing the mixing and stirring underground, the external noise pollution is reduced; in addition, due to the They are all underground operations, and the dust generated during the operation can be closed and recycled, further reducing the dust pollution of the outside world; and the conveying device can facilitate the transportation of finished concrete, and increase the discharge speed and capacity, thereby improving the working efficiency of the mixing plant. Use the unloading device to transport the product concrete from the mixing main engine to the concrete tank truck. At the same time, it can temporarily store the finished concrete materials within a certain period of time, which can ensure the continuous operation of the mixing main engine to a certain extent and play a buffer role for the concrete tank truck. effect. Preferably, a vibrator (not shown) is arranged on the outer wall of the unloading device. In this way, the concrete in the unloading device can be easily discharged and the solidification of the finished concrete can be delayed. The feeding device can facilitate the transportation of sand and gravel aggregates in the storage yard directly to the aggregate bin, which has the characteristics of high efficiency, accuracy and environmental protection, thereby improving the working efficiency and production capacity of the mixing plant. And each aggregate bin has a corresponding feeding device, which can prevent the aggregates of different specifications in the aggregate bin from being mixed with each other, and can ensure the preparation of the ratio of sand and gravel aggregates, thereby ensuring the production of concrete. Accuracy of Specifications. At the same time, for underground excavation projects, the finished concrete from the mixing main engine can also be transported horizontally, and the lifting link and tank truck transportation link are also missing, and it can meet the demand for large-scale use of concrete in underground projects in the first place; it can also be used The concrete mixing plant covers a certain area by the transmission device to meet the needs of all parties. For example, if the concrete mixing plant is built near a subway platform, it can at least radiate the concrete demand of the two platforms and the corresponding tunnels in between.

The conveying device 2 in this embodiment adopts a conveyer belt, which can expand the range of concrete conveying. Of course, in various exemplary embodiments, delivery pipes with concrete delivery pumps can also be used. The concrete delivery pump can adopt existing equipment, such as a mobile supporting pump, which is convenient for proper arrangement following the progress of the project.

In this embodiment, the feeding device 13 installed on the fixed bracket 14 is inclined, and the angle between it and the horizontal plane is 35°-60°. The outlet at the lower end is connected to the aggregate bin 6, and the dust removal pipe is provided at the upper end. 131, the dust removal pipes 131 of two adjacent feeding devices 13 communicate with each other. Because the material drop point depends on the position, height and inclination angle of the material, and the inclination angle of the feeding device 13 in this embodiment is relatively large, which is 35°-60°, the sand and gravel will be thrown along the slope, and the horizontal velocity and Under the action of inertia, the sand and gravel are thrown to the center of the aggregate bin 6 in a parabola, which greatly improves the problem of lateral stacking when feeding the side wall. On the other hand, the dust generated during the movement of sand and gravel in the feeding device or the dust in the aggregate bin 6 can be sucked away through the dust removal pipe and processed in a unified manner, which greatly solves the problem of dust generated during material blanking.

In the present embodiment, a flap sealing door 132 and a vibrating feeding tank 15 are provided at the feeding port at the upper end of the feeding device 13, and the vibrating feeding tank 15 is fixed on the fixed bracket 14, on which a vibrating device 151 and a vibrating feeding tank 15 are arranged. Sliding sealing door 152; the sand and gravel in the storage yard 12 are sent into the vibrating feeding tank 15 through the feeding conveying system 16, and under the vibration of the vibrating feeding tank 15, the sand and gravel are gradually added into the feeding device 13. The vibration feeding tank 15 can resist strong impact, thereby improving the reliability of the equipment. And the sliding sealing door 152 and the flap sealing door 132 seal the vibrating feeding tank 15 into an independent compartment, which realizes the fully enclosed feeding of the system and ensures that the dust in the dumping process will not escape.

Stockyard 12 among the present embodiment can be fully enclosed by wall skin. In this way, some fine grains or powders can be effectively stacked. Of course, in different embodiments, a windshield wall with openings, a windshield or a windproof net can also be used to close the

The storage device in this embodiment also includes a powder silo 5, a water storage silo 7 and an additive silo 8. There are several powder silos 5 arranged horizontally on one side of the mixing machine 1, and at least two aggregate silos 6. , arranged horizontally on the other side of the mixing host 1 adjacent to the powder silo 5, the bottom of the aggregate silo 5 is provided with a conveyor 9 connected to the inlet of the mixing host 1, a water storage bin 7 and an additive bin 8 is arranged between the powder silo 5 and the aggregate silo 6. Specifically, the aggregate bin 6 has a multi-level structure, which can realize sand and gravel batching, weighing and unloading. It quantitatively transports the aggregate to the mixing host 1 through the conveyor 9, and the inlet of the aggregate bin 6 is not high. On the ground, the material truck directly transports the aggregate to the material inlet of the aggregate bin 6 on the ground, and the aggregate can be added by dropping the material, which saves the lifting process of the aggregate, reduces energy consumption, and saves footprint. In this example, there are multiple aggregate bins, which are arranged along the longitudinal direction of the storage yard. In this way, the aggregate bins can have the function of one use and multiple backups, and avoid the problem of lack of aggregate transportation in production.

The conveying device 2 in this embodiment is arranged on one side of the stirring host 1 and corresponds to the conveyor 9 . The conveyor 9 can be a scraper conveyor or a belt conveyor, and its arrangement structure is straight, which can ensure the horizontal conveying of the aggregate. Of course, in different embodiments, the arrangement structure of the conveyor 9 can also adopt a bent type with a small inclination angle at one end connected to the mixing host 1, so that the conveyor can be It is designed to have a small section of inclined lifting, which is beneficial to reduce the height of the mixing main engine in the pit, that is, to reduce the depth of the pit. The angle of the small inclination angle is 12°-16° relative to the horizontal, preferably 15°, which can meet the service conditions.

The powder silo 5 in this embodiment includes a cement silo and a blending silo, and a weighing system is arranged above the mixing host 1, and the discharge ends of the cement silo and each blending silo are connected to the weighing silo through a conveying device 10. The weighing system is connected; the water storage bin 7 and the additive bin 8 are connected with the weighing system through control pipelines. The conveying device 10 can be a screw feeder or an air conveying chute.

The mixing station in another embodiment also includes a dust removal device 11 correspondingly arranged above the powder silo 5 and the mixing host 1 . The dust removal device 11 in this embodiment is a bag dust removal device, which can collect the dust generated by the mixing machine 1 during the mixing process, thereby reducing the dust concentration in the pit. Of course, a dust collection and filtering device can also be added on the upper part of the pit to reduce dust and purify the air in the entire pit.

In another embodiment, the top surface of the pit 4 is covered with a cover, and an inspection port, a ventilation port, and a sand and gravel input port are left on the cover, and the sand and gravel input port is connected with the aggregate bin 6. The material openings are connected, and the conveying device 2 extends out of the cover, and outputs the finished concrete that has been stirred outside the pit 4 . In this way, the underground sealed space is formed by adding a cover to the pit, and the main equipment is moved underground, so that the main equipment helps the pit to form a solid closed space, which is not only conducive to dust collection, but also can eliminate low-frequency vibration , reduce noise pollution, and realize centralized control of pollution sources such as dust and noise.

The mixing plant in another embodiment also includes an electric control system arranged on the ground, and storage device, mixing host 1, conveying device 2, unloading device 3, feeding device 13, conveyor 9, weighing system, The delivery device 10 is electrically connected. In this way, the electric control system may include components for controlling the start, stop, speed, etc. of the components in the mixing plant; by setting the electric control system on the ground, the operator does not need to enter the pit to The monitoring system installed in the pit and the electric control system on the ground jointly control the operation below, which improves the safety of operation.

Finally, it is noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in the form Various changes can be made to it in the aspects and details without departing from the scope defined by the claims of the present invention.

Claims (10)

1. a kind of environmentally friendly underground project dug underground concrete mixing plant, including yard, the storage device of storage material and the storage The connected stirring host of cryopreservation device, it is characterised in that：Also include conveyer, device for discharging and charging gear, the storage dress Put, stirring host, device for discharging, conveyer are arranged in the melt pit of below ground, the yard, charging gear are all provided with Put on the ground, described device for discharging is set below the discharging opening of the stirring host, and device for discharging passes through conveyer Directly finished product concrete is mutually linked up with construction site, is provided with the yard and multiple aggregate bins of the storage device point The not one-to-one charging gear.

2. environmentally friendly underground project dug underground concrete mixing plant according to claim 1, it is characterised in that：The transmission dress It is set to conveyer belt or the dispatch tube with concrete pump.

3. environmentally friendly underground project dug underground concrete mixing plant according to claim 1, it is characterised in that：In fixed support The charging gear of upper installation is inclined to set, and the angle between horizontal plane is 35 °~60 °, lower end outlet and aggregate bin phase Even, upper end is provided with dust removing tube, the mutual UNICOM of dust removing tube of adjacent two charging gears.

4. environmentally friendly underground project dug underground concrete mixing plant according to claim 3, it is characterised in that：In the feed Turnover panel hermatic door is provided with the upper end charge door of device.

5. environmentally friendly underground project dug underground concrete mixing plant according to claim 4, it is characterised in that：In the feed Vibration feed tank is provided with the upper end charge door of device, vibrating device is provided with the vibration feed tank and is slidingly sealed Door.

6. the environmentally friendly underground project dug underground concrete mixing plant according to claim any one of 1-5, it is characterised in that：Institute Stating storage device also includes filler bin, water storage warehouse and additive storehouse, and the filler bin is several, in horizontally arranged described Stirring host side, the aggregate bin is at least two, in horizontally arranged another in the stirring host close to the filler bin At side, the bottom of the aggregate bin is provided with the conveyer being connected with the stirring host feeding mouth, the water storage warehouse and Additive storehouse is arranged between the filler bin and the aggregate bin.

7. environmentally friendly underground project dug underground concrete mixing plant according to claim 6, it is characterised in that：The conveyer Using drag conveyor or ribbon conveyer, its arrangement is flat type or had with one end that the stirring host is connected small The bending type at inclination angle, the angle of the small inclination is in 12 °~16 ° with level.

8. environmentally friendly underground project dug underground concrete mixing plant according to claim 7, it is characterised in that：The filler bin Including cement bin and blending feed bin, Weighing system is provided with above the stirring host, the cement bin and respectively blending feed bin go out Material end is connected by conveying device with Weighing system；The water storage warehouse and additive storehouse pass through control piper and Weighing system It is connected.

9. environmentally friendly underground project dug underground concrete mixing plant according to claim 8, it is characterised in that：The conveying dress Put and use feed screw or air conveyer flume.

10. environmentally friendly underground project dug underground concrete mixing plant according to claim 9, it is characterised in that：The stirring Standing also includes the electric-control system of arrangement on the ground, with the storage device, stirring host, conveyer, device for discharging, feed Device, conveyer, Weighing system, conveying device electrical connection.