CN220835986U - Preparation system of multistage ultra-fine machine-made sand - Google Patents

Abstract

The utility model belongs to the technical field of sand making by a vertical mill, and particularly relates to a preparation system of multistage-matched superfine machine-made sand. The preparation system comprises a raw material bin, a vibrating feeder I, a belt conveyor I and a lifter I which are sequentially connected, wherein an outlet of the lifter I is connected with an inlet of a vertical mill, and an outlet of the vertical mill is connected with an inlet of a probability screen; the outlet of the probability screen is respectively connected with the inlet of the vertical mill and the inlet of the primary powder concentrator; the powder outlet of the primary powder concentrator is connected with the inlet of the secondary powder concentrator, and the sand outlet of the primary powder concentrator is connected with the inlet of the swing screen; each layer of screening mechanism of the swing screen is respectively connected with a corresponding finished product bin I; and the powder outlet and the sand outlet of the secondary powder concentrator are respectively connected with the inlet of the finished product bin II and the inlet of the finished product bin III. The utility model adopts the vertical mill to prepare the machine-made sand, has high sand yield, low system circulation quantity and low system energy consumption, and the grading of the finished product can be adjusted in multiple stages through multiple stages of screening and multiple stages of powder selection.

Description

Preparation system of multistage ultra-fine machine-made sand

Technical Field

The utility model belongs to the technical field of sand making by a vertical mill, and particularly relates to a preparation system of multistage-matched superfine machine-made sand.

Background

The existing machine-made sand production equipment generally produces common building sand with the thickness of 0-4.75mm, and mainly adopts the process scheme of conventional machine-made sand, namely raw material-feeding device-sand production equipment such as ball mill/impact crusher/hammer crusher, screening/powder selecting and finished product, aiming at producing superfine special sand with the thickness of less than 1mm. The utility model patent in China with the application number 202120265241.4 discloses a machine-made sand production system for road and bridge construction, which comprises a machine-made sand production device main body, wherein a feeding machine, a sand making crusher, a vibrating screen, a sand stone powder selecting machine and a superfine powder selecting machine are arranged on the machine-made sand production device main body, a vibrating feeder is arranged at the lower end of the feeding machine, a vibrating feeding plate is arranged in the vibrating feeder, one side of the vibrating feeder is connected with a guide hopper, the lower end of the guide hopper is positioned above the sand making crusher, the lower end of the sand making crusher is provided with a second material conveying belt, a first dust collector is arranged on the second material conveying belt, the other end of the second material conveying belt is connected with the vibrating screen, and a distinguishing box is connected to one side of the vibrating screen.

In the crushing process, when equipment such as a jaw crusher, a cone crusher, a dual-rotor sand making machine, a vertical shaft type impact crusher and the like is adopted as main crushing equipment, the crushing principle is that the impact force of the jaw crusher and the cone crusher is utilized to crush particles, the acting force of the particles is small, the particles are selectively crushed, the produced machine-made sand particles are poor in circularity and are mostly in the shape of needles. In addition, the problems of low sand yield and large circulation amount exist, and the sand yield is generally 10-30%. The ball mill is adopted as crushing equipment, the produced machine-made sand has better particle circularity, but the main function of the ball mill is grinding, a large amount of fine powder (the fine powder refers to powdery particles below 0.075 mm) can be generated in the production process, the fine powder can cause the increase of water demand of concrete and the deterioration of durability, and the content of the fine powder needs to be strictly controlled in the machine-made sand. In addition, the production energy consumption of the ball mill is very high, which is unfavorable for large-scale and large-scale production.

In addition, the existing machine-made sand preparation system has low productivity of a single system and is not easy for large-scale industrialized production; the grading sand has low proportion, and the grading of the finished product cannot be adjusted in multiple stages, so that the problem of flexible production cannot be realized.

Disclosure of utility model

In order to solve at least one technical problem in the prior art, the application provides a preparation system for multistage-matched superfine machine-made sand, which adopts a vertical mill to prepare machine-made sand, has high sand yield, low system circulation quantity, high operation efficiency and low system energy consumption, and the finished product grading can realize flexible production by multistage screening and multistage powder selection.

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

The preparation system comprises a raw material bin, a vibrating feeder I, a belt conveyor I and a lifter I which are sequentially connected, wherein an outlet of the lifter I is connected with an inlet of a vertical mill, and an outlet of the vertical mill is connected with an inlet of a probability screen through a lifter II; the outlet of the probability screen is respectively connected with the inlet of the vertical mill and the inlet of the primary powder concentrator; the powder outlet of the primary powder concentrator is connected with the inlet of the secondary powder concentrator through a lifter III, and the sand outlet of the primary powder concentrator is connected with the inlet of the swing screen; the swing screen is of a multi-layer screening structure, and outlets of all layers of screening mechanisms are respectively connected with corresponding finished product bins I; the powder outlet of the secondary powder concentrator is connected with the inlet of the finished product bin II, and the sand outlet of the secondary powder concentrator is connected with the inlet of the finished product bin III.

Preferably, an outlet of the lifting machine I is connected with an inlet of the vertical mill through a buffer bin I, a vibration feeder II and a belt conveyor II which are sequentially connected, and a sand outlet of the primary powder selecting machine is connected with an inlet of the swing screen through the buffer bin II.

Preferably, the two groups of buffer bins I and the two groups of vibration feeders II are respectively and correspondingly arranged, the outlets of the lifting machine I are respectively connected with the inlets of the two groups of buffer bins I, and the two groups of vibration feeders II are respectively connected with the belt conveyor II.

Preferably, the finished product bin I is provided with three groups and is respectively used for storing 20-40 mesh sand stones, 40-70 mesh sand stones and 70-140 mesh sand stones screened by the swing screen, the finished product bin II is used for storing more than 200 mesh stone powder selected by the secondary powder selector, and the finished product bin III is used for storing 140-200 mesh sand stones selected by the secondary powder selector.

Preferably, the vertical mill comprises a bracket, a cylinder body arranged on the bracket, a grinding disc arranged in the cylinder body, a material blocking ring arranged on the grinding disc, a transmission device for driving the grinding disc to rotate, a rocker arm mechanism arranged on the bracket, a grinding roller arranged on the rocker arm mechanism, a feeding cylinder arranged on the cylinder body above the grinding disc and a discharging cylinder arranged at the lower part of the cylinder body.

Preferably, the edge of the upper end face of the grinding disc is fixedly connected with a plurality of sleeves, and the material blocking ring is fixedly connected with the upper end face of each sleeve.

Preferably, the fastening bolt penetrates through the retaining ring and is fixedly penetrated into the sleeve.

Preferably, the sleeve is detachably arranged on the grinding disc, a plurality of fixing holes are uniformly distributed at the edge of the upper end face of the grinding disc, and the fastening bolts penetrate through the material blocking ring and the sleeve and are in threaded connection with the fixing holes.

Preferably, the material blocking ring is of a split type structure.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the vertical mill is adopted for producing machine-made sand, and is a material bed crushing principle, and materials are ground and shaped in the crushing and sand-making process, so that the finished product grains are round and full; in addition, the particles are crushed by adopting the relative movement of the grinding roller and the grinding disc, the energy efficiency utilization rate is higher than that of the traditional crusher, the energy consumption can be saved by 15-45%, and the energy-saving effect is obvious;

2. By arranging the primary powder selecting machine and the secondary powder selecting machine, coarse powder after primary powder selecting is collected in a concentrated mode and then passes through a secondary powder selecting system, secondary recovery of finished product graded sand is achieved, and the yield is improved; the material after screening by the probability screen is conveyed in a two-way, so that the normal unqualified large-grain size graded sand is guaranteed to return, and meanwhile, 20-40 mesh, 40-70 mesh, 70-140 mesh, 140-200 mesh graded sand and more than 200 mesh stone powder are respectively collected, so that the grading adjustment of a finished product is more flexible, and meanwhile, the energy conservation and consumption reduction are realized due to low system circulation amount and high yield;

3. By arranging two groups of buffer bins I, the raw materials with two different tastes can be mixed, the application range of the system is improved, the quality of finished products is stable, the cost of processing raw materials is reduced, and the combined use of poor materials and good materials can be realized; and the product has flexibility with adjustable diversity, and the product can be adjusted on line during working condition production. In addition, the buffer bin I and the buffer bin II can buffer materials, and the feeding stability of the bin outlet process equipment is ensured

Drawings

FIG. 1 is a flow chart of a production process system of example 1 of the present utility model.

Fig. 2 is a flow chart of a production process system of embodiment 2 of the present utility model.

Fig. 3 is a schematic structural view of a vertical mill according to an embodiment of the present utility model.

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Fig. 5 is a schematic view of a part of connection structure of the grinding disc, the sleeve and the retaining ring.

In the figure: 11. raw material bin, 12, vibration feeder I,13, belt conveyor I,14, lifting machine I,15, vertical mill, 151, support, 152, barrel, 153, millstone, 1531, sleeve, 1532, fastening bolt, 1533, fixed hole, 154, retaining ring, 155, transmission, 156, rocker arm mechanism, 157, grinding roller, 158, feeding barrel, 159, discharging barrel, 16, lifting machine II,17, probability sieve, 18, primary powder selecting machine, 19, lifting machine III,110, secondary powder selecting machine, 111, swing sieve, 112, finished product bin I,113, finished product bin II,114, finished product bin III,115, buffer bin I,116, vibration feeder II,117, belt conveyor II,118, buffer bin II.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

Referring to fig. 1, a preparation system of multistage ultra-fine machine-made sand comprises a raw material bin 11, a vibration feeder I12, a belt conveyor I13 and a lifter I14 which are sequentially connected. The vibrating feeder I12 can quantitatively convey the raw materials in the raw material bin 11 to the belt conveyor I13, and the raw materials on the belt conveyor I13 enter the vertical mill 15 after being lifted by the lifter I14. The outlet of the elevator I14 is connected with the inlet of the vertical mill 15, and the raw materials in the elevator I14 enter the vertical mill 15 for grinding. The outlet of the vertical mill 15 is connected with the inlet of the probability screen 17 through the elevator II16, and the raw materials ground by the vertical mill 15 enter the inlet of the elevator II16 from the discharge port of the vertical mill 15 and enter the probability screen 17 after being lifted by the elevator II 16. The outlet of the probability screen 17 is respectively connected with the inlet of the vertical mill 15 and the inlet of the primary powder concentrator 18. The probability screen 17 is in the prior art, the materials screened by the probability screen 17 are divided into two types, one type is large particles which do not reach the grading standard of the machine-made sand, and the large particles enter the vertical mill 15 again through the conveying device to be crushed and ground; one type is particles that meet the machine-made sand grading criteria, entering the primary classifier 18. In this embodiment, the material with a particle size less than 20 mesh is returned to the vertical mill and the material with a particle size greater than 20 mesh is fed into the primary classifier 18.

The powder outlet of the primary powder concentrator 18 is connected with the inlet of a lifting machine III19, the outlet of the lifting machine III19 is connected with the inlet of a secondary powder concentrator 110, and the sand outlet of the primary powder concentrator 18 is connected with the inlet of a swinging screen 111. The primary powder concentrator 18 is a prior art, for example, a cage type powder concentrator, and the powder is collected by adjusting the wind power to enable the material with the specified particle size to enter the inlet of the lifting machine III19 from the powder outlet of the primary powder concentrator 18. Large-particle sand that cannot escape from the powder outlet of the primary classifier 18 enters the oscillating screen 111 from the sand outlet of the primary classifier 18.

In this embodiment, the oscillating screen 111 is a multi-layer screening structure, which is a prior art, such as a mesh screening structure, and the outlets of each layer of screening mechanism are respectively connected to the corresponding finished product bin I112. In this embodiment, the oscillating screen 111 may have a two-layer screening structure, and may sequentially screen out 20-40 mesh, 40-70 mesh, 70-140 mesh sand. The finished bin I112 is provided with three groups and is used for storing 20-40 mesh sand, 40-70 mesh sand and 70-140 mesh sand which are sieved by the swinging sieve 111.

The powder outlet of the secondary powder concentrator 110 is connected with the inlet of the finished product bin II113, and the sand outlet of the secondary powder concentrator 110 is connected with the inlet of the finished product bin III 114. The secondary powder concentrator 110 is a prior art, for example, a cage type powder concentrator, and the powder is collected by adjusting the wind power to enable the material with the specified particle size to enter the finished product bin II113 from the powder outlet of the secondary powder concentrator 110. Large-particle sand that fails to escape from the powder outlet of the secondary classifier 110 enters the finished bin III114 from the sand outlet of the secondary classifier 110. In this embodiment, the product bin II113 is used for storing the stone powder of 200 meshes or more selected by the secondary powder concentrator 110, and the product bin III114 is used for storing the sand of 140-200 meshes selected by the secondary powder concentrator 110.

Therefore, by the machine-made sand preparation system, machine-made sand can be prepared by utilizing the material bed crushing principle of the vertical mill, so that the machine-made sand finished product is round and full in grain shape; by arranging the primary powder concentrator and the secondary powder concentrator, the grading sand with 20-40 meshes, 40-70 meshes, 70-140 meshes, 140-200 meshes and stone powder with more than 200 meshes are respectively collected, so that the grading adjustment of a finished product is more flexible, and meanwhile, the energy conservation and consumption reduction are realized due to low system circulation quantity and high yield. In the embodiment, the raw material bin, the vibrating feeder, the belt conveyor, the elevator, the probability screen, the powder selecting machine and the swing screen are all in the prior art.

In this embodiment, the vertical mill 15 may be an existing cage type powder selecting vertical mill, but since the vertical mill does not select powder in the present preparation system, in order to reduce the system cost, in this embodiment, the vertical mill 15 has the following structure.

Referring to fig. 3 to 5, the vertical mill 15 includes a bracket 151, a cylinder 152 fixedly connected to the bracket 151 by bolts, a grinding disc 153 disposed in the cylinder 152, a retaining ring 154 disposed on the grinding disc 153, a transmission device 155 for driving the grinding disc 153 to rotate, a rocker mechanism 156 disposed on the bracket 151, a grinding roller 157 disposed on the rocker mechanism 156, a feeding cylinder 158 disposed on the cylinder 152 above the grinding disc 153, and a discharging cylinder 159 disposed at the lower portion of the cylinder 152. The structure and working principle of the transmission device 155, the grinding disc 153, the rocker arm mechanism 156, the grinding roller 157 and the discharging barrel 159 are all the prior art, and are not repeated here.

In order to facilitate the lower layer crushing and grinding materials on the grinding disc 153 to timely fall from the grinding disc 153 so as to improve the crushing efficiency, a plurality of sleeves 1531 are fixedly connected to the edge of the upper end face of the grinding disc 153, and a material blocking ring 154 is fixedly connected to the upper end face of each sleeve 1531. By this design, a gap is provided between the retaining ring 154 and the upper end surface of the grinding disc 153 to allow the ground material to be removed.

Further, the fastening bolts 1532 are inserted into the material blocking ring 154 and fixedly inserted into the sleeve 1531, so that the material blocking ring 154 is convenient to replace and disassemble.

Further, the sleeve 1531 is detachably disposed on the grinding disc 153, that is, the sleeve 1531 and the grinding disc 153 are of a split structure, a plurality of fixing holes 1533 are uniformly distributed at the edge of the upper end surface of the grinding disc 153, and fastening bolts 1532 are inserted into the retaining ring 154 and the sleeve 1531 and are screwed into the fixing holes 1533. Thereby, the sleeve 1531 with different heights can be conveniently replaced while the material blocking ring 154 is conveniently replaced and disassembled, and the gap between the material blocking ring 154 and the grinding disc 153 is adjusted.

In order to improve the utilization rate of the material blocking ring 154, the material blocking ring 154 is of a split structure formed by a plurality of parts, and the integral failure and replacement caused by local abrasion are avoided.

Example 2

Referring to fig. 2, this embodiment is a further improvement on the basis of embodiment 1, and mainly adds a surge bin structure.

The outlet of the lifting machine I14 is connected with the inlet of the vertical mill 15 through a buffer bin I115, a vibration feeder II116 and a belt conveyor II117 which are sequentially connected, and the sand outlet of the primary powder concentrator 18 is connected with the inlet of the swing screen 111 through a buffer bin II 118.

Further, two groups of buffer bins I115 and vibration feeders II116 are respectively and correspondingly arranged, the outlet of the lifting machine I14 is respectively connected with the inlets of the two groups of buffer bins I115, and the two groups of vibration feeders II116 are respectively connected with a belt conveyor II 117.

By arranging two groups of buffer bins I115, the raw materials with two different tastes can be mixed and combined, the application range of the system is improved, the quality of a finished product is stable, the cost of processing raw materials is reduced, and the combined use of poor materials and good materials can be realized; and the product has flexibility with adjustable diversity, and the product can be adjusted on line during working condition production. In addition, the buffer bin I115 and the buffer bin II118 can buffer materials, and the feeding stability of the bin outlet process equipment is guaranteed.

The main working process of the embodiment of the utility model is as follows:

1. The raw materials in the raw material bin 11 are quantitatively transmitted to a belt conveyor I13 through a vibrating feeder I12, lifted through a lifter I14 and then transmitted to a buffer bin I115, and raw materials in the buffer bin I115 enter a vertical mill 15 through a vibrating feeder II116 and a belt conveyor II 117;

2. The raw materials are crushed and ground by the vertical mill 15, enter the lifter II16 by the discharging cylinder 159, enter the probability screen 17 after being lifted, are screened by the probability screen 17, enter the vertical mill 15 again for crushing and grinding when the sand particles are smaller than 20 meshes, and enter the primary powder selector 18 when the sand particles are larger than 20 meshes;

3. Separating by a primary powder separator 18, enabling sand particles smaller than 140 meshes to enter a buffer bin II118 through a sand outlet of the primary powder separator 18, sequentially entering a swinging screen 111, screening sand particles by the swinging screen 111, screening out sand particles with 20-40 meshes, 40-70 meshes and 70-140 meshes, and storing the sand particles in a corresponding finished product bin I; the sand particles with the particle size larger than 140 meshes enter the secondary powder concentrator 110 through the lifter III19, the stone powder with the particle size larger than 200 meshes enters the finished product bin II113 through the powder outlet of the secondary powder concentrator 110 for storage, and the sand particles with the particle size of 140-200 meshes enter the finished product bin III114 through the sand outlet of the secondary powder concentrator 110 for storage.

The control process of the preparation system is in the prior art, and only the working process can be realized, and the description is omitted here.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a multistage preparation system who joins in marriage superfine mechanism sand, includes former feed bin (11), vibration feeder I (12), band conveyer I (13) and lifting machine I (14) that connect gradually, its characterized in that: the outlet of the elevator I (14) is connected with the inlet of the vertical mill (15), and the outlet of the vertical mill (15) is connected with the inlet of the probability screen (17) through the elevator II (16); the outlet of the probability screen (17) is respectively connected with the inlet of the vertical mill (15) and the inlet of the primary powder concentrator (18); the powder outlet of the primary powder concentrator (18) is connected with the inlet of the secondary powder concentrator (110) through a lifter III (19), and the sand outlet of the primary powder concentrator (18) is connected with the inlet of the swing screen (111); the swing screen (111) is of a multi-layer screening structure, and outlets of all layers of screening mechanisms are respectively connected with corresponding finished product bins I (112); the powder outlet of the secondary powder concentrator (110) is connected with the inlet of the finished product bin II (113), and the sand outlet of the secondary powder concentrator (110) is connected with the inlet of the finished product bin III (114).

2. The preparation system of multistage ultra-fine machine-made sand according to claim 1, wherein: the outlet of the lifting machine I (14) is connected with the inlet of the vertical mill (15) through a buffer bin I (115), a vibration feeder II (116) and a belt conveyor II (117) which are sequentially connected, and the sand outlet of the primary powder concentrator (18) is connected with the inlet of the swing screen (111) through a buffer bin II (118).

3. The preparation system of multistage-matched superfine machine-made sand according to claim 2, which is characterized in that: two groups of buffer bins I (115) and vibration feeders II (116) are respectively and correspondingly arranged, the outlets of the lifting machine I (14) are respectively connected with the inlets of the two groups of buffer bins I (115), and the two groups of vibration feeders II (116) are respectively connected with the belt conveyor II (117).

4. The preparation system of multistage ultra-fine machine-made sand according to claim 1, wherein: the finished product bin I (112) is provided with three groups and is used for storing 20-40 mesh sand stones, 40-70 mesh sand stones and 70-140 mesh sand stones which are screened out by the swing screen (111), the finished product bin II (113) is used for storing more than 200 mesh sand stones selected by the secondary powder selector (110), and the finished product bin III (114) is used for storing 140-200 mesh sand stones selected by the secondary powder selector (110).

5. The preparation system of multistage ultra-fine machine-made sand according to claim 1, wherein: the vertical mill (15) comprises a bracket (151), a cylinder body (152) arranged on the bracket (151), a grinding disc (153) arranged in the cylinder body (152), a material blocking ring (154) arranged on the grinding disc (153), a transmission device (155) for driving the grinding disc (153) to rotate, a rocker arm mechanism (156) arranged on the bracket (151) and a grinding roller (157) arranged on the rocker arm mechanism (156), a feeding cylinder (158) arranged on the cylinder body (152) above the grinding disc (153) and a discharging cylinder (159) arranged at the lower part of the cylinder body (152).

6. The preparation system of multistage ultra-fine machine-made sand according to claim 5, wherein: the edge of the upper end face of the grinding disc (153) is fixedly connected with a plurality of sleeves (1531), and the material blocking ring (154) is fixedly connected to the upper end face of each sleeve (1531).

7. The preparation system of multistage ultra-fine machine-made sand according to claim 6, wherein: the fastening bolt (1532) is penetrated in the material blocking ring (154) and fixedly penetrated in the sleeve (1531).

8. The preparation system of multistage ultra-fine machine-made sand according to claim 7, wherein: the sleeve (1531) is detachably arranged on the grinding disc (153), a plurality of fixing holes (1533) are uniformly distributed at the edge of the upper end face of the grinding disc (153), and the fastening bolts (1532) penetrate through the material blocking ring (154) and the sleeve (1531) and are in threaded connection with the fixing holes (1533).

9. The preparation system of multistage ultra-fine machine-made sand according to claim 6, wherein: the material blocking ring (154) is of a split type structure.