CN222551400U - A control system for multi-stage screening of machine-made sand - Google Patents
A control system for multi-stage screening of machine-made sand Download PDFInfo
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- CN222551400U CN222551400U CN202421281281.8U CN202421281281U CN222551400U CN 222551400 U CN222551400 U CN 222551400U CN 202421281281 U CN202421281281 U CN 202421281281U CN 222551400 U CN222551400 U CN 222551400U
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Abstract
本申请涉及机制砂加工技术领域，具体公开了一种用于机制砂多级筛分的控制系统，其包括分别设有进风口、出风口、入料口、出料口的壳体，入料口设置在壳体的上部，出料口设置在壳体的下部，其特征在于：还包括控制器、风速传感器、调节风门、风机、若干导流板；风速传感器用于测量进风口的气流风速，风速传感器安装在进风口上，风速传感器的输出端连接控制器的输入端；导流板用于分散进风口竖直方向上的气流，多个导流板沿进风口的高度横向安装，且多个导流板与进风口形成的间隙宽度从上至下逐渐增大，导流板通过导流板驱动机构可在竖直方向上转动，导流板驱动机构的输入端连接控制器的输出端；调节风门用于开闭出风口，调节风门安装在出风口上，调节风门的输入端连接控制器的输出端；风机用于在壳体内形成从进风口向出风口流动的气流，风机的输入端连接控制器的输出端；控制器用于根据气流风速控制导流板驱动机构的开闭，以及控制风机的开闭，以及控制调节风门的开闭。本方案可解决现有机制砂在多级筛分时气流控制不够精准导致砂的多级别区分效果不好的问题。
The present application relates to the technical field of machine-made sand processing, and specifically discloses a control system for multi-stage screening of machine-made sand, which comprises a shell body respectively provided with an air inlet, an air outlet, a material feed port, and a material discharge port, wherein the material feed port is arranged at the upper part of the shell body, and the material discharge port is arranged at the lower part of the shell body, and is characterized in that: it also comprises a controller, a wind speed sensor, an adjusting damper, a fan, and a plurality of guide plates; the wind speed sensor is used to measure the air flow speed at the air inlet, the wind speed sensor is installed on the air inlet, and the output end of the wind speed sensor is connected to the input end of the controller; the guide plate is used to disperse the air flow in the vertical direction of the air inlet, and a plurality of guide plates are arranged along the height of the air inlet It is installed horizontally, and the gap width formed by multiple guide plates and the air inlet gradually increases from top to bottom. The guide plate can be rotated in the vertical direction through the guide plate driving mechanism, and the input end of the guide plate driving mechanism is connected to the output end of the controller; the regulating damper is used to open and close the air outlet, the regulating damper is installed on the air outlet, and the input end of the regulating damper is connected to the output end of the controller; the fan is used to form an airflow from the air inlet to the air outlet in the shell, and the input end of the fan is connected to the output end of the controller; the controller is used to control the opening and closing of the guide plate driving mechanism according to the airflow speed, control the opening and closing of the fan, and control the opening and closing of the regulating damper. This solution can solve the problem that the airflow control of the existing machine-made sand is not accurate enough during multi-stage screening, resulting in poor multi-level sand differentiation effect.
Description
Technical Field
The utility model relates to the technical field of machine-made sand processing, in particular to a control system for machine-made sand multistage screening.
Background
At present, the basic process of sand aggregate production is to purchase ore, perform vibration cleaning on the ore to clean out mud on stones, select classification, crush, vibration classification, dust removal, crush and classification, and obtain machine-made sand with the particle size reaching the standard. The particle shape and size distribution of the machine-made sand directly affect the production quality of the concrete. The screening device of the machine-made sand is a key device special for grading the granularity of the machine-made sand, and is widely applied to modern sand aggregate production lines.
The practical screening equipment in the existing sand aggregate production line is mainly a vibrating screen, and a few screening equipment is used for screening, but the existing winnowing sorting mechanism is mainly used for separating stone powder from fine sand screens, so that the main purpose is to remove the stone powder in the fine sand, and generally, only 2-3 kinds of screening can be realized, and multistage sorting of sand cannot be realized.
In order to meet different purchasing demands of customers on sand grain sizes, a new winnowing mechanism is provided for researching a fine sorting technology of sand, in the winnowing process, the falling sand is blown by utilizing transverse airflow, when the weight of the sand is light, the falling distance of the sand in the horizontal direction is far, when the weight of the sand is heavy, the falling distance of the sand in the horizontal direction is near, an air inlet of a common winnowing mechanism is of a channel structure, the air speed can be controlled to be a fixed value only by controlling the rotating speed of a fan, the control means is single, because the sand grain size is distributed within a range of 0 mm-5 mm, the sand dead weight is small, the sand cannot be completely dispersed by means of single-beam constant airflow, multiple levels of distinguishing and removing are completed, the winnowing result is not fine enough, the unqualified sand with small grain size easily falls into a qualified discharge hole, and the grain size distribution range is disordered, so that the control system for machine-made sand multistage screening is provided.
Disclosure of utility model
The utility model provides a control system for multistage screening of machine-made sand, which aims to solve the problem that the multistage-level distinguishing effect of sand is poor due to insufficient air flow control in multistage screening of the existing machine-made sand.
The air inlet is arranged at the upper part of the shell, the discharging hole is arranged at the lower part of the shell, the air inlet is used for measuring the air flow speed of the air inlet, the air speed sensor is arranged on the air inlet, the output end of the air speed sensor is connected with the input end of the controller, the guide plates are used for dispersing the air flow in the vertical direction of the air inlet, the guide plates are transversely arranged along the height of the air inlet, the guide plates can rotate in the vertical direction through a guide plate driving mechanism, the input end of the guide plate driving mechanism is connected with the output end of the controller, the air damper is used for opening and closing the air outlet, the air damper is arranged on the air outlet, the input end of the air damper is connected with the output end of the controller, the air blower is used for forming the air flow from the air inlet to the air outlet in the shell, the input end of the air blower is connected with the output end of the controller, and the controller is used for controlling the guide plates according to the air speed and the driving mechanism and controlling the opening and closing of the air blower.
The basic principle of the scheme is that the wind speed in the shell is measured through the wind speed sensor, when the air flow passes through the guide plate of the air inlet, the guide plate disperses the air flow into a plurality of beams, the flow direction of the air flow is regulated through controlling the rotation angle of the guide plate, and the air flow speed of the air inlet is controlled to be gradually increased from bottom to top due to the gradual increase of the gap between the guide plate and the air inlet from top to bottom according to the Bernoulli principle when the air inlet is narrowed, so that the wind speed of the air inlet is controlled to be gradually increased from bottom to top, and the sand is screened through a plurality of sections of wind speeds in the falling process, thereby being beneficial to the differentiation of particle sizes.
The wind power is regulated and controlled only through the fan in the existing winnowing structure, the air flow control is not accurate enough, the multistage distinguishing effect of sand is poor, the working state control of the fan is achieved through the fact that the air speed sensor measures the air speed in real time, the air speed is longitudinally distributed step by step through the fact that a plurality of guide plates are arranged at intervals, the air direction is controlled through rotation of the guide plates, the air speed is regulated and controlled through controlling the opening and closing degree of the air damper, and when the multiple air-conditioner shells are arranged, air flow can be prevented from flowing backwards into the upper-stage air-conditioner shells through the opening and closing states of the air damper of the air outlet.
Further, the below of discharge gate is equipped with conveyer, be equipped with flow sensor in the discharge gate, flow sensor is used for measuring the sand volume that the discharge gate flows, and flow sensor's output is connected the input of controller, and the output of controller is connected to conveyer's input, and the controller still is used for controlling conveyer's transmission rate according to the sand volume of discharge gate. Because the sand amount of the discharged material after screening fluctuates, the speed of the material transmitted to the rear part can be regulated according to different weights, and the energy is saved.
Further, the guide plate driving structure comprises a rotating shaft, the rotating shaft is mounted to the middle of the guide plate, the rotating shaft is arranged along the length of the guide plate, and the guide plate can be rotationally connected to the inner wall of the air inlet through the rotating shaft.
Further, a pressure sensor is arranged in the feeding hole and used for detecting the sand amount in the feeding hole, the output end of the pressure sensor is connected with the input end of the controller, and the controller is further used for controlling the opening and closing of the feeding hole according to the sand amount in the feeding hole. Because the flow of the sand inlet is used for regulating and controlling the wind speed according to the quantity of the sand to be distinguished.
Further, the number of the shells is two, namely a primary shell and a secondary shell, a discharge hole of the primary shell is connected with a feed inlet of the secondary shell, the number of guide plates in an air inlet of the primary shell is 3, and the number of guide plates in the air inlet of the secondary shell is 2.
Further, 4 gaps are formed between the 3 guide plates of the primary shell and the air inlet, and the ratio of the 4 gaps to the total gaps is 15-18%, 18-22%, 22-28% and 28-32% in sequence from top to bottom. The sand can be blown away from the upper part inside the shell at a higher wind speed, so that the sand with small particle size can fly to a discharge hole close to the air outlet under the action of wind power.
Further, one end of the guide plate, which is far away from the inside of the shell, is an inclined surface which is gradually widened along the wind direction. The front end is arranged in a triangle slope shape, so that the flow is convenient to guide.
Drawings
FIG. 1 is a schematic diagram of a frame according to an embodiment of the present utility model;
FIG. 2 is a schematic side view of an embodiment of the present utility model;
fig. 3 is a schematic front view of the structure of the embodiment of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
The reference numerals in the drawings of the specification comprise a primary sorting mechanism 1, a primary feed inlet 11, a discharge outlet 13, an air inlet 2, a deflector 21, an air door 3, an air outlet pipe 4, a fan 42, a secondary sorting mechanism 5, a secondary feed inlet 51 and an air outlet 6.
An embodiment is substantially as shown in fig. 1 to 3:
As shown in fig. 2 and 3, the multi-stage continuous screening device for machine-made sand has two stages of multi-stage screening sorting mechanisms in the embodiment, and comprises a primary sorting mechanism 1 and a secondary sorting mechanism 5, wherein the shell of the primary sorting mechanism 1 is a primary shell, and the shell of the secondary sorting mechanism 5 is a secondary shell. The two shells are respectively provided with a feed inlet, a discharge hole 13, an air inlet 2 and an air outlet 6, wherein the upper end of the shell of the primary sorting mechanism 1 is provided with a primary feed inlet 11 close to the air inlet 2, the lower end of the shell is provided with a plurality of primary discharge holes 13, the primary discharge holes 13 comprise unqualified discharge holes 13 and qualified discharge holes 13 which are sequentially arranged along the air inlet direction, the upper end of the shell of the secondary sorting mechanism 5 is provided with a secondary feed inlet 51 close to the air inlet 2, the unqualified discharge holes 13 are communicated with the secondary feed inlet 51 of the secondary sorting mechanism 5, and in the embodiment, three secondary sorting mechanisms 5 are arranged, namely a 2-1# machine, a 2-2# machine and a 2-3# machine, so that sand flowing out of the three unqualified discharge holes 13 is secondarily screened.
The outside at the casing is equipped with the controller, and the air intake 2 of primary sorting mechanism 1, secondary sorting mechanism 5 all sets up guide plate 21, and guide plate 21 passes through guide plate 21 actuating mechanism and rotates to be connected in air intake 2, and in this embodiment, guide plate 21 actuating mechanism includes the pivot, and the pivot setting is at the middle part of guide plate 21, makes guide plate 21 can vertically rotate in air intake 2 through the pivot. The input end of the driving mechanism of the deflector 21 is connected with the output end of the controller. The secondary sorting mechanism 5 and the air outlet 6 of the primary sorting mechanism 1 are respectively provided with a regulating air door 3, the input end of the regulating air door 3 is connected with the output end of the controller, and the air quantity in different sorting mechanisms can be controlled through the opening and closing degree of the regulating air door 3. The air outlet 6 is connected with the fan 42 through a pipeline, the fan 42 is used for forming air flow flowing from the air inlet 2 to the air outlet 6 in the shell, the input end of the fan 42 is connected with the output end of the controller, the fan 42 in the embodiment is a variable frequency fan 42, and therefore synchronous adjustment can be carried out according to the sand amount required to be processed.
The wind inlet 2 is provided with a wind speed sensor for measuring the wind speed of the air flow of the air inlet 2, the output end of the wind speed sensor is connected with the input end of a controller, and the controller is used for controlling the frequency of the fan 42, the opening and closing of the air door 3 and the rotation and stopping of a driving mechanism of the guide plate 21 through the wind speed of the air flow.
The pressure sensor is arranged in the feeding hole and is used for detecting the sand amount in the feeding hole, the output end of the pressure sensor is connected with the input end of the controller, and the controller is also used for controlling the opening and closing of the feeding hole according to the sand amount in the feeding hole. The conveyer is equipped with in the below of discharge gate 13, and conveyer in this embodiment is the conveyer belt, is equipped with flow sensor in the discharge gate 13, and flow sensor is used for measuring the sand volume that discharge gate 13 flowed out, and flow sensor's output is connected the input of controller, and the output of controller is connected to conveyer's input, and the controller still is used for controlling conveyer's transmission rate according to the sand volume of discharge gate 13.
In order to further improve the distinguishing precision of sand, the number of the guide plates 21 at the air inlet 2 of the primary shell of the embodiment is 3, 4 gaps are formed between the 3 guide plates 21 and the air inlet 2, and the ratio of the 4 gaps to the total gaps is 15-18%, 18-22%, 22-28% and 28-32% in sequence from top to bottom. By controlling the gap of the deflector 21 from top to bottom so that the gap from top to bottom increases gradually, the flow velocity increases when the air inlet 2 narrows according to Bernoulli's principle, thereby controlling the air velocity of the air inlet 2 so that the air velocity of the air inlet increases gradually from bottom to top, thereby blowing off the sand at a higher air velocity above the inside of the housing, so that the small-sized sand can fly to the discharge port 13 near the air outlet 6 under the action of wind force. Further, one end of the deflector 21 far away from the inside of the housing is an inclined surface gradually widened along the wind direction, as shown in the figure, the front end of the deflector 21 is triangular, the rear end is rectangular, and the tip of the triangle is used for guiding the airflow.
The specific implementation process is as follows:
The wind speed in the shell is measured through the wind speed sensor, when the air flow passes through the guide plate 21 of the air inlet, the guide plate 21 disperses the air flow into a plurality of beams, the flow direction of the air flow is regulated by controlling the rotation angle of the guide plate 21, and as the gap of the guide plate 21 from top to bottom is gradually increased, according to Bernoulli principle, when the air inlet 2 is narrowed, the flow speed is increased, thereby controlling the wind speed of the air inlet 2, so that the wind speed of the air inlet is gradually increased from bottom to top, and the sand is screened by a plurality of sections of wind speeds in the falling process, thereby being beneficial to the differentiation of particle sizes.
The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. The control system for the multistage screening of the machine-made sand comprises a shell provided with an air inlet, an air outlet, a feed inlet and a discharge outlet, wherein the feed inlet is arranged at the upper part of the shell, and the discharge outlet is arranged at the lower part of the shell;
The wind speed sensor is used for measuring the air speed of the air flow at the air inlet, and is arranged on the air inlet, and the output end of the wind speed sensor is connected with the input end of the controller;
The guide plates are used for dispersing the air flow in the vertical direction of the air inlet, the guide plates are transversely arranged along the height of the air inlet, the gap width formed by the guide plates and the air inlet is gradually increased from top to bottom, the guide plate can rotate in the vertical direction through a guide plate driving mechanism, and the input end of the guide plate driving mechanism is connected with the output end of the controller;
The air inlet is connected with the air inlet of the controller, and the air inlet is connected with the air inlet of the controller;
The fan is used for forming air flow flowing from the air inlet to the air outlet in the shell, and the input end of the fan is connected with the output end of the controller;
The controller is used for controlling the opening and closing of the guide plate driving mechanism, the opening and closing of the fan and the opening and closing of the air door according to the air speed of the air flow.
2. The control system for multistage screening of machine-made sand according to claim 1, wherein a conveying device is arranged below the discharge port, a flow sensor is arranged in the discharge port and used for measuring the sand amount flowing out of the discharge port, the output end of the flow sensor is connected with the input end of the controller, the input end of the conveying device is connected with the output end of the controller, and the controller is further used for controlling the conveying speed of the conveying device according to the sand amount of the discharge port.
3. A control system for multistage screening of machine-made sand according to claim 2, wherein the deflector driving structure comprises a rotating shaft, the rotating shaft is mounted at the middle part of the deflector, the rotating shaft is arranged along the length of the deflector, and the deflector can be rotatably connected to the inner wall of the air inlet through the rotating shaft.
4. The control system for machine-made sand multistage screening according to claim 3, wherein a pressure sensor is installed in the feed inlet, the pressure sensor is used for detecting sand amount in the feed inlet, the output end of the pressure sensor is connected with the input end of the controller, and the controller is further used for controlling opening and closing of the feed inlet according to the sand amount in the feed inlet.
5. The control system for multistage screening of machine-made sand according to claim 4, wherein the number of the shells is two, namely a first-stage shell and a second-stage shell, a discharge hole of the first-stage shell is connected with a feed hole of the second-stage shell, the number of guide plates in an air inlet of the first-stage shell is 3, and the number of guide plates in the air inlet of the second-stage shell is 2.
6. The control system for multistage screening of machine-made sand according to claim 5, wherein 4 gaps are formed between the 3 guide plates and the air inlet of the primary shell, and the ratio of the 4 gaps to the total gaps is 15-18%, 18-22%, 22-28% and 28-32% in sequence from top to bottom.
7. The control system for multistage screening of machine-made sand according to claim 6, wherein the end of the guide plate far away from the inside of the shell is an inclined surface which gradually increases in width along the wind direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421281281.8U CN222551400U (en) | 2024-06-05 | 2024-06-05 | A control system for multi-stage screening of machine-made sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202421281281.8U CN222551400U (en) | 2024-06-05 | 2024-06-05 | A control system for multi-stage screening of machine-made sand |
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| CN222551400U true CN222551400U (en) | 2025-03-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118321162A (en) * | 2024-06-07 | 2024-07-12 | 贵州铁建科技发展有限公司 | A multi-stage continuous screening device for machine-made sand |
-
2024
- 2024-06-05 CN CN202421281281.8U patent/CN222551400U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118321162A (en) * | 2024-06-07 | 2024-07-12 | 贵州铁建科技发展有限公司 | A multi-stage continuous screening device for machine-made sand |
| CN118321162B (en) * | 2024-06-07 | 2026-02-27 | 贵州铁建科技发展有限公司 | A multi-stage continuous screening device for manufactured sand |
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