CN206765103U - A kind of underground project dug underground concrete mixing plant - Google Patents

Abstract

The utility model discloses a concrete mixing station for underground excavation engineering, which belongs to the field of mixing stations and includes a storage device and a mixing main engine, both of which are arranged below the ground in a pit with a cover to form an underground sealed space; the utility model also includes The conveying device that transports the finished concrete directly to the construction site is arranged in the pit, with one end connected to the mixing main engine and the other end extending to the construction site. 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 conveying device is used to directly output the finished concrete, which has the characteristics of high timeliness and high efficiency, and effectively solves the problem of underground excavation during construction. The large amount of concrete urgently needed in the process provides guarantee for the quality and progress of the project.

Description

Concrete mixing plant for underground excavation engineering

technical field

The utility model belongs to the technical field of commercial concrete mixing stations, in particular to a concrete mixing station for underground excavation engineering.

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 the utility model is to overcome the defects of the existing ground-type mixing plant (building), thereby providing a concrete mixing plant for underground excavation engineering, to solve the demand for uninterrupted large-scale use of concrete in underground engineering.

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

A concrete mixing plant for underground excavation engineering, including a storage device for storing materials, and a mixing host connected to the storage device, the storage device and the mixing host are both arranged in a pit below the ground; the mixing station also It includes a conveying device for directly transporting the finished concrete to the construction site. The conveying device is arranged in the pit, one end is connected to the discharge port of the mixing main engine, and the other end extends to the construction site.

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

Furthermore, the mixing station also includes a discharge device arranged in the pit and corresponding to the discharge port of the mixing main engine up and down, for connecting with the construction site through the conveying device.

Further, the storage device includes a powder silo, an aggregate silo, a water storage silo and an admixture silo. There are several powder silos arranged horizontally on one side of the mixing main engine. The aggregate silo is at least Two, arranged horizontally 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, and the water storage The bin and the additive bin are arranged between the powder bin and the aggregate bin.

Further, the conveyor adopts a scraper conveyor or a belt conveyor.

Further, the arrangement structure of the conveyor is a straight type or a bent type with a small inclination angle at one end connected to the main mixer, and the angle of the small inclination angle is 12°-16° to the horizontal.

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.

Furthermore, the mixing station also includes an electric control system arranged on the ground, which is electrically connected with the storage device, the mixing host, the conveying device, the unloading device, the conveyor, the weighing system, and the 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 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, a concrete mixing station for underground excavation provided in this embodiment is composed of a storage device for storing materials and a mixing host 1 connected to the storage device, and the storage device and the mixing host 1 are arranged in In the pit 4 below the ground; this stirring main frame 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; This storage device can be selected closed or non-closed Storage tanks, pits, wherein the materials include aggregate and powder or other raw materials for obtaining concrete that can be applied to the utility model; the mixing station also includes a conveying device 2 for directly transporting the finished concrete to the construction site , the conveying device 2 is arranged in the pit 4, one end is connected to the discharge port of the mixing host 1, 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. 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 different embodiments, a delivery pipe with a concrete delivery pump can also be used. The concrete delivery pump can be an existing equipment, a mobile supporting pump, which is convenient for proper arrangement according to the progress of the project.

The mixing station in another embodiment also includes a discharge device 3 arranged in the pit 4 and corresponding to the discharge port of the mixing main engine 1 up and down, for connecting with the construction site through the conveying device 2 . In this way, the finished concrete from the mixing main engine is delivered to the conveying device by the unloading device, and then the finished concrete is directly conveyed to the construction site by the conveying device; at the same time, the finished concrete material can be temporarily stored within a certain period of time, and can be used in a certain period of time. To a certain extent, the continuous operation of the mixing host is guaranteed, and it plays a buffer role for the conveying device. 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 storage device in this embodiment includes a powder silo 5, an aggregate silo 6, a water storage silo 7 and an admixture silo 8. There are several powder hoppers 5 arranged horizontally on one side of the mixing machine 1, and the aggregate silo 6 There are at least two, 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 feed inlet of the mixing host 1, and the water storage bin 7 And the admixture bin 8 is set between the powder bin 5 and the aggregate bin 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.

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, which is electrically connected to the storage device, the mixing main machine 1, the conveying device 2, the unloading device 3, the conveyor 9, the weighing system, and the conveying device 10 . 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 (9)

1. A concrete mixing plant for underground excavation engineering, including a storage device for storing materials, and a mixing host connected to the storage device, characterized in that: the storage device and the mixing host are both arranged in a pit below the ground The mixing station also includes a transmission device for directly transporting the finished concrete to the construction site, the transmission device is arranged in the pit, one end is connected to the discharge port of the mixing main engine, and the other end extends to the Construction Site. 2. The concrete mixing plant for underground excavation according to claim 1, characterized in that: the conveying device is a conveying belt or a conveying pipe with a concrete conveying pump. 3. The concrete mixing plant for underground excavation according to claim 1 or 2, characterized in that: the mixing plant also includes a vertically corresponding setting in the pit and corresponding to the discharge port of the mixing main engine The unloading device is used to connect with the construction site through the conveying device. 4. The concrete mixing plant for underground excavation according to claim 3, characterized in that: the storage device includes a powder silo, an aggregate silo, a water storage silo and an admixture silo, and the powder silo is several one, arranged horizontally on one side of the mixing host, at least two aggregate bins, arranged horizontally on the other side of the mixing host next to the powder bin, the bottom of the aggregate bin A conveyor connected to the material inlet of the mixing main engine is provided, and the water storage bin and the additive bin are arranged between the powder bin and the aggregate bin. 5. The concrete mixing plant for underground excavation according to claim 4, characterized in that: the conveyor is a scraper conveyor or a belt conveyor. 6. The concrete mixing plant for underground excavation according to claim 5, characterized in that: the arrangement structure of the conveyor is a straight type or a bent type with a small inclination at one end connected to the mixing main engine, The angle of the small inclination angle is 12°-16° relative to the horizontal. 7. The concrete mixing plant for underground excavation according to claim 6, characterized in that: the powder silo includes a cement silo and a blending silo, a weighing system is arranged above the mixing host, and the cement The outlets of the silo and each blending silo are connected with the weighing system through the conveying device; the water storage bin and the additive bin are connected with the weighing system through the control pipeline. 8. The concrete mixing plant for underground excavation according to claim 7, characterized in that: the conveying device adopts a screw feeder or an air conveying chute. 9. The concrete mixing plant for underground excavation according to claim 8, characterized in that: the mixing plant also includes an electric control system arranged on the ground, which is connected with the storage device, the mixing host, the transmission device, the unloading Material device, conveyor, weighing system, and conveying device are electrically connected.