CN112387590A

CN112387590A - Mould control sieve

Info

Publication number: CN112387590A
Application number: CN202011209846.8A
Authority: CN
Inventors: 赵大力; 林辉; 王赞斌; 王伟; 韩飞; 吉宏志; 王朝华; 马斌斌
Original assignee: Henan Liming Heavy Industry Technology Co Ltd
Current assignee: Henan Liming Heavy Industry Technology Co Ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-02-23
Anticipated expiration: 2040-11-03
Also published as: CN112387590B

Abstract

The invention belongs to the technical field of sand screening, and particularly relates to a grading-adjustable mold control screen which comprises an air blower, a winnowing chamber, a screening chamber, a material collecting bin and a control system, wherein a main air duct on the air blower is connected with the winnowing chamber, the screening chamber is connected below the winnowing chamber, a screen I, a screen II and a screen III are arranged in the screening chamber, a material separating plate is arranged above the spacing position of the screen I and the screen II, the tail ends of the screen II and the screen III are provided with a material returning opening, the lower part of the screening chamber is connected with the material collecting bin, the winnowing chamber and the side wall of the screening chamber on the same side of the air outlet are hermetically connected with an air return pipe, the upper end of the air return pipe is communicated with an air outlet, the lower end of the air return pipe is communicated with the material collecting bin. The mold control screen has the advantages that the mold control screen is uniformly allocated through the control system, the automatic adjustment of the machine-made sand gradation and the micro powder content of the finished material product is realized, and the finished product production efficiency of the whole sand making system is improved.

Description

Mould control sieve

Technical Field

The invention belongs to the technical field of sand screening, and particularly relates to a grading-adjustable modular control screen.

Background

At present, materials crushed by a VU sand making system sand making machine have different particle sizes, namely, sand with over 5mm particle size and micro powder with less than 0.075mm harmful to machine-made sand grading. In order to meet the use requirements of infrastructure, coarse sand with the size of more than 5mm and micro powder with the size of less than 0.075mm need to be screened out through a mold control screen, and useful sand with the size of 5-0.075 mm is obtained. The existing mold control sieve mainly carries out wind power separation and powder removal on input materials through a wind separation chamber arranged in the mold control sieve, but the screening efficiency and the powder removal effect are influenced due to limited wind power separation and accumulation of a large amount of micro powder, and meanwhile, along with the development of production technology in the building industry, higher requirements are also provided for machine-made sand grading, but the traditional mold control sieve can only complete the screening effect, the machine-made sand grading of finished products is uncontrollable, and the stone production development requirements are influenced. The patent document of chinese patent application No. 202010477086.2 of kokai 2020.08.11 discloses a modular control sieve with adjustable gradation, which is used for fine screening of materials through an air separation chamber and a screening chamber, but does not effectively collect and treat screened micro-powder, and meanwhile, because the mesh on the screen is small, the micro-powder and small sand particles are easy to block, and the screening efficiency is reduced.

Disclosure of Invention

In order to solve the problems, the invention provides the mould control sieve which improves the sieving efficiency, reduces the micro powder content and can adjust the grading, and the mould control sieve is suitable for the use requirements of different finished product machine-made sand grading.

The technical scheme of the invention is realized as follows:

the utility model provides a mould accuse sieve, includes air-blower, selection by winnowing room, screening room, aggregate bin, control system, its characterized in that: the main air duct on the blower is connected with the winnowing chamber and is positioned at the side of the material inlet, the lower end of the material inlet is provided with a baffle plate, the upper part of the other end of the winnowing chamber is provided with an air outlet, the lower part of the winnowing chamber is connected with a screening chamber, a screen I, a screen II and a screen III are arranged in the screening chamber, the position of the screen II is higher than that of the screen I, the screen III is positioned below the screen I and the screen II, the meshes of the screen I, the screen II and the screen III are sequentially reduced, a material separating plate is arranged above the spacing position of the screen I and the screen II, the tail ends of the screen II and the screen III are provided with a return port, the lower part of the screening chamber is connected with a material collecting bin, the winnowing chamber at the same side as the air outlet and the side wall of the screening chamber are hermetically connected with a return air pipe, the upper end of the return, the air adjusting pipe is arranged to be of a half-U-shaped structure, the U-shaped end of the air adjusting pipe is connected with the side wall of the material collecting bin, at least one air supplementing opening is formed in the other three side walls of the material collecting bin, an air supplementing adjusting valve is arranged at the air supplementing opening respectively, the air outlet is connected with an external dust removing pipeline, and the air draft in the dust removing pipeline is larger than the air blast quantity of the air blower.

Furthermore, the air inlet adjusting valve comprises an air inlet air door and an air inlet actuator, the air inlet air door is externally connected with the air inlet actuator, the air inlet actuator is connected and controlled by the control system, and the air inlet adjusting valve is arranged at the joint of the air adjusting pipe and the main air duct; the air supply adjusting valve comprises an air supply air door and an air supply actuator, the air supply air door is externally connected with the air supply actuator, the air supply actuator is connected and controlled by the control system, and the air supply air door is arranged at an air supply port of the material collecting bin.

Furthermore, the material distributing plate is connected with a control system for control, one end of the material distributing plate is fixed at the other end, the other end of the material distributing plate freely rotates to adjust the position, and the included angle between the angle adjusted by the material distributing plate and the horizontal direction ranges from 0 degree to 90 degrees.

Further, the adjusting angle range of the material distributing plate is preferably 30-70 degrees.

Furthermore, the meshes of the screen II and the screen III are the same, the mesh is 4.75mm, and the mesh of the screen I is 2.36 mm.

Furthermore, the position of the outlet of the air adjusting pipe in the material collecting bin is higher than the positions of the air supplementing ports on the other three sides, the air supplementing ports on the other three sides are on the same horizontal position, the air adjusting pipe and the air supplementing adjusting valve are arranged at the tail ends of the air adjusting pipe and the air supplementing adjusting valve, the end of the air adjusting pipe is arranged inside the material collecting bin, the inclined opening is arranged at the port, the inclined direction is perpendicular to the inclined direction of the side wall of the material collecting bin, and the air adjusting pipe.

Furthermore, the material baffle plate is connected with a control system, so that one end of the material baffle plate is fixed, and the other end of the material baffle plate can freely rotate to adjust an included angle between the material baffle plate and the vertical direction.

The invention has the beneficial effects that:

the first layer of screen is set into two sections of screens with different mesh sizes, an angle-adjustable material distribution plate is arranged above the screens, an air adjusting pipe and a matched air inlet adjusting valve and air supply adjusting valve are arranged, and the angle of the material distribution plate and the size of working air flow are uniformly distributed by an intelligent control system.

The invention can realize the automatic adjustment of the sand grading of the finished product machine and the automatic adjustment of the micro powder content by arranging the angle-adjustable material distributing plate, the air adjusting pipe, the matched air inlet adjusting valve and the air supplementing adjusting valve and uniformly allocating through the control system. Meanwhile, the screening efficiency of the mold control screen can be improved, and the accumulation of materials on the screen is avoided, so that the production efficiency of finished products of the whole sand making system is improved, and the energy consumption is not increased.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a bin portion in the present invention.

In the figure: 1. a blower; 2. an air separation chamber; 3. a screening chamber; 4. a material collecting bin; 5. a control system; 6. a main air duct; 7. a feeding port; 8. a striker plate; 9. an air outlet; 10. a material distributing plate; 11. returning the material port; 12. a return air duct; 13. an air inlet regulating valve; 14. an air supply opening; 15. air supply regulating valve; 16. adjusting an air pipe; 31. a screen I; 32. a screen II; 33. a screen III; 13-1, an air inlet air door; 13-2, an air inlet actuator; 15-1, air supply damper; 15-2, and an air replenishing actuator.

Detailed Description

The core of the invention is to provide a mould control screen.

The following will further describe the contents of the technical solutions adopted by the present invention to solve the technical problems in the background art with reference to the accompanying drawings:

the air outlet 9 is connected to an external dust removal pipeline of the VU sand making system air system, the air draft in the dust removal pipeline connected with the air outlet 9 is larger than the air blowing amount of the air blower 1, and the air blown out of the air blower 1 is divided into two air flows through the main air duct 6 and the air adjusting pipe 16, so that the VU sand making system air supply device is always in a negative pressure state under the action of the VU sand making system, and the air supplementing opening 14 and the air adjusting pipe 16 on the material collecting bin 4 compensate the air blowing amount to a certain extent and form air flows from bottom to top.

As shown in fig. 1 and 2, the machine-made sand to be screened is fed from the feeding port 7, and is separated by the wind power of the air separation chamber 2, and most of the micro powder with the particle size of less than 0.075mm is discharged from the air outlet 9 along with the air flow. The materials separated by wind power are transversely dispersed and horizontally thrown under the action of transverse air flow and gravity, the materials with large particle size float close to each other, the materials with small particle size float far away, the materials with large particle size fall to the material returning opening 11 under the blocking of the material baffle plate 8 and are prevented from falling on the screen II 32 under the action of the wind power to influence the screening efficiency, the rest materials are sorted by the material separating plate 10, the materials with small particle size fall on the screen I31, the materials with particle size smaller than 2.36mm fall on the screen III 33 through the screen I31, the materials with larger particle size fall on the screen II 32, the materials with particle size smaller than 4.75mm fall on the screen III 33 through the screen II 32 after the screening of the screen II 32, the materials falling on the screen III 33 are finally screened, the materials with particle size smaller than 4.75mm pass through the screen III 33 and fall on the material collecting bin 4, and the air flow formed at the air adjusting pipe 16 and the air supplementing opening 14 carries out secondary screening on the materials falling on the material collecting bin 4, and blowing out part of micro powder and fine sand with fine granularity contained in the sand, discharging the micro powder and the fine sand from the air outlet 9 through the air return pipe 12, and finally dropping the material subjected to secondary air separation into the aggregate bin 4 to obtain the finished product machine-made sand meeting the grading requirement.

Through grading detection of collected finished product machine-made sand, when the proportion of fine sand with the granularity of less than 2.36mm is less than the grading requirement, the control system 5 is required to adjust the angle of the material distribution plate 10 to increase the proportion of the material entering the screen I31, and when the proportion of fine sand with the granularity of less than 2.36mm is more than the grading requirement, the control system 5 is required to adjust the material distribution plate 10 to the opposite direction to reduce the proportion of the material entering the screen I31.

The material is divided into two parts for screening by arranging the material dividing plate 10, so that the screening efficiency of the screen is improved, and meanwhile, the materials with different granularities can be controlled to enter different screens through the material dividing plate 10, so that finished product machine-made sand with different grading requirements can be obtained.

When the content of the micro powder of the finished material collected in the material collecting bin 4 exceeds the grading requirement, the control system 5 is required to adjust the air inlet adjusting valve 13 and increase the opening of the air inlet air door 13-1, so that the air quantity entering the air adjusting pipe 16 is increased, the air flow from bottom to top is enhanced, the micro powder with smaller granularity in the material falling into the material collecting bin 4 is blown out to form secondary air separation, and the micro powder is discharged through the air return pipe 12 and the air outlet 9. The air supply adjusting valve 15 is adjusted by the control system 5 while the air inlet adjusting valve 13 is adjusted, the opening degree of the air supply air door 15-1 at the corresponding position is increased, and the inside of the air screen is in a negative pressure state, so that air flow from outside to inside is formed at the air supply opening 14, and air flow in a large range is formed in the material collecting bin 4, so that places with micro powder in the air screen can be driven by the air flow and discharged through the air outlet 9.

The control system 5 is electrically connected with the material distributing plate 10, the material blocking plate 8, the air inlet regulating valve 13 and the air supplementing regulating valve 15, the control system 5 adopts a conventional electrical cabinet or control cabinet, power is supplied through a built-in power supply, a control center receives and sends signals, and the corresponding position is regulated; the air port of the air adjusting pipe 16 arranged in the material collecting bin 4 is higher than the air supplementing ports 14 at the other three positions, so that the air in the air adjusting pipe 16 is prevented from directly blowing to the air supplementing ports 14, the air in the air adjusting pipe 16 is blown upwards, and the end part of the air adjusting pipe is obliquely opened, so that the finished product materials are prevented from falling into the air adjusting pipe 16 and the collection of the finished product materials is prevented from being influenced.

According to the specific embodiment, the mold control sieve provided by the invention has the advantages that the control system 5 is used for uniformly blending, the automatic adjustment of the sand grading and the micro powder content of the finished material machine is realized, the finished product production efficiency of the whole sand making system is improved, and the energy consumption is not increased.

Claims

1. The utility model provides a mould accuse sieve, includes air-blower (1), selection by winnowing room (2), screening room (3), aggregate bin (4), control system (5), its characterized in that: a main air duct (6) on the air blower (1) is connected with the winnowing chamber (2) and is positioned at the side of the feeding port (7), the lower end of the feeding port (7) is provided with a material baffle (8), the upper part of the other end of the winnowing chamber (2) is provided with an air outlet (9), the lower part of the winnowing chamber (2) is connected with a screening chamber (3), a screen I (31), a screen II (32) and a screen III (33) are arranged in the screening chamber (3), the position of the screen II (32) is higher than that of the screen I (31), the screen III (33) is positioned below the screen I (31) and the screen II (32), meshes of the screen I (31), the screen II (32) and the screen III (33) are sequentially decreased, a material separating plate (10) is arranged above the spacing position of the screen I (31) and the screen II (32), the tail ends of the screen II (32) and the screen III (33) are provided with a material return port (11), the lower, air return pipe (12) are connected to the side wall of air separation chamber (2) and screening chamber (3) of air outlet (9) homonymy in a sealing manner, air outlet (9) is communicated to air return pipe (12) upper end, lower extreme intercommunication collection storehouse (4), collection storehouse (4) and main wind channel (6) are middle to be connected through adjusting tuber pipe (16), it is provided with air inlet regulating valve (13) to transfer tuber pipe (16) and main wind channel (6) hookup location department, it sets up half U type structure to transfer tuber pipe (16), the U-shaped end of transferring tuber pipe (16) links to each other with the lateral wall of collection storehouse (4), set up one at least on three other lateral walls of collection storehouse (4) and mend wind gap (14), mend wind gap (14) punishment is provided with tonifying qi governing valve (15) respectively, outside dust removal pipeline is connected in air outlet (9), the convulsions volume in the dust removal.

2. The mold controlled screen of claim 1, wherein: the air inlet adjusting valve (13) comprises an air inlet air door (13-1) and an air inlet actuator (13-2), the air inlet air door (13-1) is externally connected with the air inlet actuator (13-2), the air inlet actuator (13-2) is connected and controlled by the control system (5), and the air inlet adjusting valve (13) is arranged at the joint of the air adjusting pipe (16) and the main air duct (6); the air supply adjusting valve (15) comprises an air supply air door (15-1) and an air supply actuator (15-2), the air supply actuator (15-2) is connected to the outside of the air supply air door (15-1), the air supply actuator (15-2) is connected and controlled by the control system (5), and the air supply air door (15-1) is arranged at an air supply port (14) of the material collecting bin (4).

3. The mold controlled screen of claim 2, wherein: the material distributing plate (10) is connected with the control system (5) for control, one end of the material distributing plate (10) is fixed, the other end of the material distributing plate is freely rotated to adjust the position, and the included angle between the angle adjusted by the material distributing plate (10) and the horizontal direction ranges from 0 degree to 90 degrees.

4. A modular screen as claimed in claim 3, wherein: the adjusting angle range of the material distributing plate (10) is preferably 30-70 degrees.

5. The mold controlled screen of claim 1, wherein: the meshes of the screen II (32) and the screen III (33) are the same, the mesh is 4.75mm, and the mesh of the screen I (31) is 2.36 mm.

6. The mold controlled screen of claim 1, wherein: the position of the outlet of the air adjusting pipe (16) in the material collecting bin (4) is higher than the positions of air supplementing ports on the other three sides, the air supplementing ports on the other three sides are on the same horizontal position, the air adjusting pipe (16) and the air supplementing adjusting valve (15) are arranged at the tail ends of the air adjusting pipe and enter the material collecting bin (4), the port is obliquely opened, the oblique direction is perpendicular to the oblique direction of the side wall of the material collecting bin (4), and the air adjusting pipe (16) is integrally bent obliquely upwards after entering the material collecting bin (4).

7. The mold controlled screen of claim 1, wherein: the material baffle plate (8) is connected with the control system (5), so that one end of the material baffle plate is fixed, and the other end of the material baffle plate can freely rotate to adjust an included angle with the vertical direction.