Raw material pool concrete structure anti-cracking raw material preparation equipment and method

Abstract

The invention discloses raw material pool concrete structure anti-cracking raw material preparation equipment and method.The raw material pool concrete structure anti-cracking raw material preparation equipment comprises a raw material smashing device, the raw material smashing device is a ball mill, the ball mill comprises a barrel and steel balls located in the barrel, and the middle of an inner cavity of the barrel is divided into a front cavity and a rear cavity through a partition plate; the steel balls in the front cavity are rough grinding steel balls, the steel balls in the rear cavity are fine grinding steel balls, the side wall of the rear cavity is communicated with a plurality of storage barrels in the circumferential direction, and the side wall of the front cavity is arranged on a guide pipe communicated with the side walls of the storage barrels. The material guide pipe and the material storage barrel which are communicated with the front cavity and the rear cavity are arranged on the barrel of the ball mill, so that raw material particles in the front cavity enter the rear cavity through the material guide pipe and the material storage barrel, raw materials are prevented from returning to the rough grinding section from the fine grinding section, and the speed of the raw materials entering the other grinding section from one grinding section is increased.

Description

Technical Field

[0001] The invention relates to the technical field of concrete, and in particular to equipment and a method for preparing anti-cracking raw materials for concrete structures in a raw material pool. Background Art

[0002] In the chemical and construction fields, concrete raw material pools are usually used to store and process raw materials in concrete production. In order to prevent cracks in concrete raw material pools, especially in ultra-long raw material pools used in chemical environments, it is crucial to take anti-crack measures. To this end, it is necessary to add a variety of admixtures to the concrete structure of the raw material pool. For this purpose, many raw materials need to be ground into powder. At present, ball mills are usually used to grind these raw materials. In order to improve the grinding efficiency, multiple grinding sections are usually set in the ball mill. Different grinding sections are separated by partitions with mesh holes. From front to back, the steel balls in each grinding section are reduced in sequence, so that the raw materials are gradually ground through each grinding section from front to back.

[0003] However, since the ball mill only rotates around the axis, the raw material needs to move axially from one grinding section to another, and there is no driving force for the raw material along the axial direction. The raw material can only rely on naturally passing through the mesh holes of the partition. Moreover, since there is only one partition between the front and rear grinding sections, the finer particles at the rear can also easily enter the front grinding section, that is, the particles return from the fine grinding section to the coarse grinding section. This not only slows down the speed at which the raw material enters from one coarse grinding section to another fine grinding section, but also affects the grinding efficiency of the coarse grinding section, thereby reducing the overall grinding efficiency. Summary of the invention

[0004] In order to solve the problem of raw materials returning from the fine grinding section to the coarse grinding section, the present invention proposes a raw material preparation device with a raw material pool concrete structure anti-cracking, which prevents the raw materials from returning from the fine grinding section to the coarse grinding section and increases the speed of the raw materials entering from one grinding section to another.

[0005] The technical solution adopted by the present invention is to design raw material preparation equipment for crack prevention of concrete structure in a raw material pool, including a raw material crushing device, wherein the raw material crushing device is a ball mill, wherein the ball mill includes a cylinder and steel balls located in the cylinder, wherein the middle part of the inner cavity of the cylinder is partitioned into a front chamber and a rear chamber by a partition, wherein the steel balls in the front chamber are coarse-grinding steel balls, and the steel balls in the rear chamber are fine-grinding steel balls, wherein the side wall of the rear chamber is circumferentially connected with a plurality of material storage barrels, wherein the side wall of the front chamber is arranged on a material guide pipe connected with the side wall of the material storage barrel, wherein the depth of the material storage barrel is along the radial direction of the rear chamber, wherein the material guide pipe is inclined relative to the material storage barrel, wherein a first filter plate is arranged between the inlet of the material guide pipe and the front chamber, and a second filter plate is arranged between the outlet of the material storage barrel and the rear chamber.

[0006] In some embodiments, a push plate is provided at the other end of the front chamber relative to the first mesh plate, and a first telescopic mechanism is provided between the push plate and the cylinder, and the first telescopic mechanism controls the push plate to move forward and backward in the front chamber.

[0007] In some embodiments, an electromagnet is disposed on the plate.

[0008] In certain embodiments, the material storage barrel has an arc-shaped tube extending into the rear chamber, the arc-shaped tube is connected to the middle portion of the second filter plate, and the filter plate is provided with a mesh hole communicating with the arc-shaped tube.

[0009] In some embodiments, a first baffle is provided at the outlet of the material storage barrel, one end of which is hinged to the edge of the outlet of the material storage barrel, a guide plate is provided in the middle of the second filter plate, and a mesh is provided on the second filter plate relative to the guide plate. When the material storage barrel rotates downward, the first baffle covers the outlet of the material storage barrel, and when the material storage barrel rotates upward, the first baffle overlaps the guide plate.

[0010] In certain embodiments, a second telescopic mechanism is connected between the second filter plate and the partition plate.

[0011] In some embodiments, the outlet of the material guide tube is provided with a second baffle, which is hinged to the outlet edge of the material guide tube. When the material storage barrel is rotated upward, the second baffle covers the outlet of the material guide tube, and when the material storage barrel is rotated downward, the second baffle opens the outlet of the material guide tube.

[0012] Preparation method of raw materials for anti-cracking of concrete structure in raw material pool: S1: Material selection: Prepare the materials needed for making concrete, including rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture; S2: Forming of anti-cracking composite admixture: Preparation of anti-cracking composite admixture, including sand fine aggregate, anti-caking solvent, fly ash, accelerator, expansion agent and polypropylene fiber; S3: Grinding: using the admixture preparation equipment to grind rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture, pre-homogenize the raw materials, and grind them into powder; S4: Mixing and stirring: Put various types of ground powders into a high-speed stirring container, add a certain amount of water, mix quickly, heat at the same time, and take out the mixture after mixing; S5: Calcination preheating: The mixed material is placed in a kiln and calcined into mature material. After calcination, preheating and decomposition operations are performed, and the preparation of large-volume crack-resistant concrete is completed.

[0013] In some embodiments, the share of the rock material is 20-30%, the share of the ceramsite aggregate is 10-15%, the share of the lime powder is 8-15%, the share of the calcium aluminate cement is 8-14%, the share of the perlite aggregate is 6-12%, the share of the cementitious material is 6-12%, the share of the ultrafine mineral powder is 6-12%, and the share of the crack-resistant composite admixture is 10-18%.

[0014] In some embodiments, the share of the rock material is 28%, the share of the expanded clay aggregate is 10%, the share of the lime powder is 10%, the share of the calcium aluminate cement is 9%, the share of the perlite aggregate is 6%, the share of the cementitious material is 11%, the share of the ultrafine mineral powder is 9%, and the share of the crack-resistant composite admixture is 17%.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention arranges a material guide pipe and a material storage barrel connecting the front and rear chambers on the cylinder of the ball mill, so that raw material particles in the front chamber enter the rear chamber through the material guide pipe and the material storage barrel, thereby preventing the raw material from returning from the fine grinding section to the coarse grinding section and increasing the speed of the raw material entering from one grinding section to another.

[0016] The invention is prepared by mixing rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture in a proportioned manner. The preparation is simple, the service strength of concrete is increased, and the occurrence of dry cracking and damage during use is reduced, the structure of concrete is improved, and the mechanical properties and durability of concrete are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described in detail below in conjunction with specific embodiments and drawings. In order to show details and facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them: Figure 1 It is a schematic diagram of embodiment 1.

[0018] Figure 2 It is a schematic diagram of Embodiment 5.

[0019] In the figure, 1, cylinder; 2, partition; 3, coarse grinding steel balls; 4, fine grinding steel balls; 5, storage barrel; 6, material guide pipe; 7, first filter plate; 8, second filter plate; 9, mesh; 10, push plate; 11, electromagnet; 12, arc tube; 13, first baffle; 14, guide plate; 15, second telescopic mechanism; 16, second baffle; 17, first telescopic mechanism. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention, and the technical solution of the present invention is further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required for the solution of the invention.

[0021] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments. Example

[0022] like Figure 1 As shown, the raw material preparation equipment for anti-cracking of concrete structure in the raw material pool includes a raw material crushing device, which is a ball mill. The ball mill includes a rotatable cylinder 1 and steel balls located in the cylinder 1. The steel balls rotate with the cylinder 1, thereby crushing the granular raw materials in the cylinder.

[0023] The middle part of the inner cavity of the cylinder 1 is separated into an adjacent front chamber and a rear chamber by a partition 2. The steel balls in the front chamber are coarse grinding steel balls 3, which are used for coarse grinding of raw materials. The front chamber is equivalent to the coarse grinding section. The steel balls in the rear chamber are fine grinding steel balls 4, which are used for further fine grinding of the raw materials crushed in the front chamber. The rear chamber is equivalent to the fine grinding section, that is, the steel balls in the front chamber are larger than the steel balls in the rear chamber. The raw material delivery port can be set on the side wall or end of the front chamber, and the finished product outlet after grinding can be set on the side wall or end of the rear chamber. These can be set according to actual needs and will not be repeated here.

[0024] The side wall of the rear chamber is circumferentially connected with a plurality of material storage barrels 5, the side wall of the front chamber is provided with a material guide pipe 6 connected with the side wall of the material storage barrel 5, the depth of the material storage barrel 5 is along the radial direction of the rear chamber, the material guide pipe 6 is inclined relative to the material storage barrel 5, and a first filter plate 7 is provided between the inlet of the material guide pipe 6 and the front chamber to block the coarsely ground steel balls 3 from entering the material guide pipe 6, and a second filter plate 8 is provided between the outlet of the material storage barrel 5 and the rear chamber to block the finely ground steel balls 4 from entering the storage barrel 5.

[0025] As the cylinder 1 rotates, when the storage barrel 5 rotates to the bottom of the cylinder 1, the raw material particles ground in the front chamber pass through the mesh 9 on the first filter plate 7 and enter the guide pipe 6, and then enter the storage barrel 5 along the guide pipe 6. When the storage barrel 5 rotates to the top of the cylinder 1, the raw materials in the storage barrel 5 fall downward into the rear chamber.

[0026] Relative to the first mesh plate 9, a push plate 10 is provided at the other end of the front chamber, and a first telescopic mechanism 17 is provided between the push plate 10 and the cylinder 1. The first telescopic mechanism 17 controls the push plate 10 to move forward and backward in the front chamber. The length of the first telescopic mechanism 17 is extended and retracted, so that the push plate 10 moves axially, thereby adjusting the size of the front chamber to be suitable for the use of different amounts of raw materials, and is also beneficial to push the raw material particles to the first filter plate 7, so that more raw material particles pass through the first filter plate 7.

[0027] An electromagnet 11 is provided on the plate body, and the electromagnet 11 generates a magnetic field to adsorb the steel ball onto the push plate 10, so that the raw material particles move to the direction of the first filter plate 7, and then the push plate 10 moves toward the first filter plate 7, so that more raw material particles pass through the first filter plate 7 and fall into the guide tube 6.

[0028] The storage barrel 5 has an arc-shaped tube 12 extending into the rear chamber, the arc-shaped tube 12 is connected to the middle of the second filter plate 8, and the second filter plate 8 is provided with a mesh 9 connected to the arc-shaped tube 12, and the raw material particles can enter the rear chamber after passing through the mesh 9 on the second filter plate 8 along the arc-shaped tube 12. The mesh 9 is located on the second filter plate 8, and the distance between the mesh 9 and the edge of the second filter plate 8 is greater than the stacking height of the fine grinding steel balls 4 in the rear chamber, so as to prevent the steel balls from affecting the raw materials passing through the mesh 9, and also prevent the raw material particles in the rear chamber from entering the arc-shaped tube 12 through the mesh 9.

[0029] The outlet of the material guide tube 6 is provided with a second baffle 16, and the second baffle 16 is hingedly connected to the outlet edge of the material guide tube 6. When the storage barrel 5 is rotated upward, the second baffle 16 covers the outlet of the material guide tube 6, so that the outlet of the material guide tube 6 is blocked, thereby preventing the raw material particles in the storage barrel 5 from entering the material guide tube 6.

[0030] When the material storage barrel 5 rotates downward, the second baffle 16 rotates downward, so that the outlet of the material guide pipe 6 is opened, thereby allowing the raw materials in the material guide pipe 6 to slide into the material storage barrel 5 .

[0031] The method for preparing raw materials for preventing cracking of concrete structure in raw material pool is as follows: S1: Material selection: Prepare the materials needed for making concrete, including rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture; S2: Forming of anti-cracking composite admixture: Preparation of anti-cracking composite admixture, including sand fine aggregate, anti-caking solvent, fly ash, accelerator, expansion agent and polypropylene fiber; S3: Grinding: Using the anti-cracking raw material preparation equipment, rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture are crushed, the raw materials are pre-homogenized, and ground into powder; S4: Mixing and stirring: Put various types of ground powders into a high-speed stirring container, add a certain amount of water, mix quickly, heat at the same time, and take out the mixture after mixing; S5: Calcination preheating: The mixed material is placed in a kiln and calcined into mature material. After calcination, preheating and decomposition operations are performed, and the preparation of large-volume crack-resistant concrete is completed.

[0032] Furthermore, the share of rock material is 24%, the share of expanded clay aggregate is 13%, the share of lime powder is 13%, the share of calcium aluminate cement is 10%, the share of perlite aggregate is 8%, the share of cementitious material is 10%, the share of ultrafine mineral powder is 9%, and the share of crack-resistant composite admixture is 13%.

[0033] Further, the share of sand fine aggregate is 25-40%, the share of anti-caking solvent is 15-25%, the share of fly ash is 10-20%, the share of accelerator is 10-18%, the share of expansion agent is 12-26% and the share of polypropylene fiber is 10-22%.

[0034] Further, the share of sand fine aggregate is 22%, the share of anti-caking solvent is 16%, the share of fly ash is 16%, the share of accelerator is 16%, the share of expansion agent is 15% and the share of polypropylene fiber is 15%.

[0035] At this time, the final large-volume crack-resistant concrete has an anti-cracking efficiency of 92%.

[0036] Embodiment 2 The share of rock material is 20-30%, the share of expanded clay aggregate is 10-15%, the share of lime powder is 8-15%, the share of calcium aluminate cement is 8-14%, the share of perlite aggregate is 6-12%, the share of cementitious material is 6-12%, the share of ultrafine mineral powder is 6-12%, and the share of anti-cracking composite admixture is 10-18%.

[0037] Further, the share of rock material is 28%, the share of expanded clay aggregate is 10%, the share of lime powder is 10%, the share of calcium aluminate cement is 9%, the share of perlite aggregate is 6%, the share of cementitious material is 11%, the share of ultrafine mineral powder is 9%, and the share of crack-resistant composite admixture is 17%.

[0038] Further, the share of sand fine aggregate is 25-40%, the share of anti-caking solvent is 15-25%, the share of fly ash is 10-20%, the share of accelerator is 10-18%, the share of expansion agent is 12-26% and the share of polypropylene fiber is 10-22%.

[0039] Further, the share of sand fine aggregate is 24%, the share of anti-caking solvent is 15%, the share of fly ash is 11%, the share of accelerator is 12%, the share of expansion agent is 18% and the share of polypropylene fiber is 20%.

[0040] At this time, the final large-volume crack-resistant concrete has an anti-cracking efficiency of 98%.

[0041] Embodiment 3 The share of rock material is 20-30%, the share of expanded clay aggregate is 10-15%, the share of lime powder is 8-15%, the share of calcium aluminate cement is 8-14%, the share of perlite aggregate is 6-12%, the share of cementitious material is 6-12%, the share of ultrafine mineral powder is 6-12%, and the share of anti-cracking composite admixture is 10-18%.

[0042] Furthermore, the share of rock material is 24%, the share of expanded clay aggregate is 13%, the share of lime powder is 13%, the share of calcium aluminate cement is 10%, the share of perlite aggregate is 8%, the share of cementitious material is 10%, the share of ultrafine mineral powder is 9%, and the share of crack-resistant composite admixture is 13%.

[0043] Further, the share of sand fine aggregate is 25-40%, the share of anti-caking solvent is 15-25%, the share of fly ash is 10-20%, the share of accelerator is 10-18%, the share of expansion agent is 12-26% and the share of polypropylene fiber is 10-22%.

[0044] Further, the share of sand fine aggregate is 24%, the share of anti-caking solvent is 15%, the share of fly ash is 11%, the share of accelerator is 12%, the share of expansion agent is 18% and the share of polypropylene fiber is 20%.

[0045] At this time, the final large-volume crack-resistant concrete has an anti-cracking efficiency of 96%.

[0046] Embodiment 4 The share of rock material is 20-30%, the share of expanded clay aggregate is 10-15%, the share of lime powder is 8-15%, the share of calcium aluminate cement is 8-14%, the share of perlite aggregate is 6-12%, the share of cementitious material is 6-12%, the share of ultrafine mineral powder is 6-12%, and the share of anti-cracking composite admixture is 10-18%.

[0047] Further, the share of rock material is 28%, the share of expanded clay aggregate is 10%, the share of lime powder is 10%, the share of calcium aluminate cement is 9%, the share of perlite aggregate is 6%, the share of cementitious material is 11%, the share of ultrafine mineral powder is 9%, and the share of crack-resistant composite admixture is 17%.

[0048] Further, the share of sand fine aggregate is 25-40%, the share of anti-caking solvent is 15-25%, the share of fly ash is 10-20%, the share of accelerator is 10-18%, the share of expansion agent is 12-26% and the share of polypropylene fiber is 10-22%.

[0049] Further, the share of sand fine aggregate is 22%, the share of anti-caking solvent is 16%, the share of fly ash is 16%, the share of accelerator is 16%, the share of expansion agent is 15% and the share of polypropylene fiber is 15%.

[0050] During the production, first prepare the materials needed for preparing concrete, including rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture; molding of anti-cracking composite admixture: preparing anti-cracking composite admixture, including fine sand aggregate, anti-caking solvent, fly ash, accelerator, expansion agent and polypropylene fiber; crushing rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture, pre-homogenizing the raw materials, grinding them into powder; putting the ground various powdered materials into a high-speed mixing A certain amount of water is added to the mixing container for rapid mixing. The heating operation is performed while the high-speed mixing is performed. After the mixing is completed, the mixture is taken out; the mixture is put into the kiln and calcined into mature material. After the calcination is completed, preheating and decomposition operations are performed, and the large-volume crack-resistant concrete is prepared. It is prepared by proportioning and mixing rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and crack-resistant composite admixture. The preparation is simple, the service strength of the concrete is increased, and the occurrence of dry cracking and damage during use is reduced, the structure of the concrete is improved, and the mechanical properties and durability of the concrete are improved.

[0051] Embodiment 5 like Figure 2As shown, different from the above-mentioned embodiment, the outlet of the material storage barrel 5 has an inwardly inclined edge relative to the side wall of the cylinder 1, so that the edge is inclined toward the rear in the axial direction, and a first baffle 13 is provided at the outlet of the material storage barrel 5, one end of the first baffle 13 is hingedly connected to the edge of the outlet of the material storage barrel 5, a guide plate 14 is provided in the middle of the second filter plate 8, and a mesh 9 is provided on the second filter plate 8 relative to the guide plate 14, when the material storage barrel 5 is rotated to the bottom, the first baffle 13 covers the outlet of the material storage barrel 5, and the first baffle 13 is tilted downward under the action of the inclined edge, thereby preventing the raw material particles in the rear chamber from entering the material storage barrel 5.

[0052] When the storage barrel 5 rotates upward, the first baffle 13 overlaps the guide plate 14, so that the material falling from the storage barrel 5 flows along the first baffle 13 and the guide plate 14 toward the mesh 9, and then enters the chamber behind the second filter plate 8 from the mesh 9. The first baffle 13 and the guide plate 14 form a guiding slope to guide the raw material particles to the mesh 9.

[0053] A second telescopic mechanism 15 is connected between the second filter plate 8 and the partition plate 2, so that the size of the space where the fine grinding steel beads are located can be adjusted by moving the second filter plate 8 axially, so as to be suitable for grinding different amounts of raw materials.

[0054] The outlet of the material guide tube 6 is provided with a second baffle 16, and the second baffle 16 is hingedly connected to the outlet edge of the material guide tube 6. When the storage barrel 5 is rotated upward, the second baffle 16 covers the outlet of the material guide tube 6, so that the outlet of the material guide tube 6 is blocked, thereby preventing the raw material particles in the storage barrel 5 from entering the material guide tube 6.

[0055] When the material storage barrel 5 rotates downward, the second baffle 16 rotates downward, so that the outlet of the material guide pipe 6 is opened, thereby allowing the raw materials in the material guide pipe 6 to slide into the material storage barrel 5 .

[0056] The first telescopic mechanism and the second telescopic mechanism may be, for example, various telescopic control mechanisms capable of achieving length adjustment, such as a pneumatic cylinder and an electric cylinder.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0058] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention. The execution order of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms (for example, "first", "next", "secondly", "again", "then", etc.) used for the convenience of description do not mean that they must be implemented in such an order.

[0059] It should be understood by those skilled in the art that all directional references (e.g., above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to facilitate the reader's understanding, and do not represent limitations (e.g., on position, orientation or use, etc.) on the scope of the invention as defined by the appended claims. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or slight deviations of conditions, quantities, values, or dimensions, some of which are within the manufacturing deviation or tolerance range. It should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of this application.

Claims

1. Raw material preparation equipment for anti-cracking of concrete structure in raw material pool, including raw material crushing device, characterized in that: The raw material crushing device is a ball mill, which includes a cylinder and steel balls located in the cylinder. The middle part of the cylinder inner cavity is divided into a front chamber and a rear chamber by a partition. The steel balls in the front chamber are coarse-grinding steel balls, and the steel balls in the rear chamber are fine-grinding steel balls. The side wall of the rear chamber is circumferentially connected with a plurality of storage barrels. The side wall of the front chamber is arranged on a material guide pipe connected with the side wall of the storage barrel. The depth of the storage barrel is along the radial direction of the rear chamber. The material guide pipe is inclined relative to the storage barrel. A first filter plate is arranged between the inlet of the material guide pipe and the front chamber, and a second filter plate is arranged between the outlet of the storage barrel and the rear chamber.

2. The equipment for preparing raw materials for preventing cracking of concrete structures in a raw material pool according to claim 1, characterized in that: Relative to the first mesh plate, a push plate is provided at the other end of the front chamber, and a first telescopic mechanism is provided between the push plate and the cylinder, and the first telescopic mechanism controls the push plate to move forward and backward in the front chamber.

3. The equipment for preparing raw materials for preventing cracking of concrete structure in raw material pool according to claim 2, characterized in that: An electromagnet is arranged on the plate body.

4. The equipment for preparing raw materials for preventing cracking of concrete structures in a raw material pool according to claim 1, characterized in that: The material storage barrel has an arc-shaped tube extending into the rear chamber, the arc-shaped tube is connected to the middle part of the second filter plate, and the filter plate is provided with a mesh hole connected to the arc-shaped tube.

5. The equipment for preparing raw materials for preventing cracking of concrete structure in raw material pool according to claim 1, characterized in that: The storage barrel outlet is provided with a first baffle, one end of which is hinged to the edge of the storage barrel outlet, a guide plate is provided in the middle of the second filter plate, and a mesh is provided on the second filter plate relative to the guide plate. When the storage barrel rotates downward, the first baffle covers the storage barrel outlet, and when the storage barrel rotates upward, the first baffle overlaps the guide plate.

6. The equipment for preparing raw materials for preventing cracking of concrete structures in a raw material pool according to claim 5, characterized in that: A second telescopic mechanism is connected between the second filter plate and the partition plate.

7. The equipment for preparing raw materials for preventing cracking of concrete structures in a raw material pool according to claim 1, characterized in that: The outlet of the material guide tube is provided with a second baffle, which is hinged to the outlet edge of the material guide tube. When the material storage barrel is rotated upward, the second baffle covers the outlet of the material guide tube, and when the material storage barrel is rotated downward, the second baffle opens the outlet of the material guide tube.

8. A method for preparing raw materials for crack prevention of concrete structure in a raw material pool, characterized in that: S1: Material selection: Prepare the materials needed for making concrete, including rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture; S2: Forming of anti-cracking composite admixture: Preparation of anti-cracking composite admixture, including sand fine aggregate, anti-caking solvent, fly ash, accelerator, expansion agent and polypropylene fiber; S3: Grinding: Using the anti-cracking raw material preparation equipment as described in any one of claims 1 to 7, the rock material, ceramsite aggregate, lime powder, calcium aluminate cement, perlite aggregate, cementitious material, ultrafine mineral powder and anti-cracking composite admixture are crushed, the raw materials are pre-homogenized, and ground into powder; S4: Mixing and stirring: Put various types of ground powders into a high-speed stirring container, add a certain amount of water, mix quickly, heat at the same time, and take out the mixture after mixing; S5: Calcination preheating: The mixed material is placed in a kiln and calcined into mature material. After calcination, preheating and decomposition operations are performed, and the preparation of large-volume crack-resistant concrete is completed.

9. The method for preparing anti-cracking raw materials for raw material pool concrete structure according to claim 8, characterized in that: The share of the rock material is 20-30%, the share of the ceramsite aggregate is 10-15%, the share of the lime powder is 8-15%, the share of the calcium aluminate cement is 8-14%, the share of the perlite aggregate is 6-12%, the share of the cementitious material is 6-12%, the share of the ultrafine mineral powder is 6-12%, and the share of the anti-cracking composite admixture is 10-18%.

10. The method for preparing anti-cracking raw materials for raw material pool concrete structure according to claim 9, characterized in that: The share of the rock material is 28%, the share of the expanded clay aggregate is 10%, the share of the lime powder is 10%, the share of the calcium aluminate cement is 9%, the share of the perlite aggregate is 6%, the share of the cementitious material is 11%, the share of the ultrafine mineral powder is 9%, and the share of the anti-cracking composite admixture is 17%.

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