A mechanism sandstone powder content automatic measuring device

Abstract

The application provides a mechanism sandstone powder content automatic measuring device, which comprises a first screening mechanism, a second screening mechanism, a vibrating mechanism connected to the first screening mechanism, support frames installed on both sides of the second screening mechanism, and a control system; the first screening mechanism comprises a feeding port opened at the top, a screen mesh arranged below the feeding port, a screen mesh support connected below the screen mesh, and a first weighing sensor installed on the end face of the screen mesh support, and the lower end of the screen mesh support is provided with a first discharge port; the second screening mechanism comprises multiple sections of landslides staggered in a ladder shape below the first discharge port and a collector arranged at the bottom of the landslides, one end of the landslide is inclined downward, and the upper end of the landslide is provided with a fan system consistent with the inclination direction of the landslide; the collector is connected with a second weighing sensor. The filtering device for the heat supply conveying system can realize automatic measurement of the mechanism sandstone powder content through two-stage screening mechanisms, reduces manual intervention, and improves the measurement efficiency.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, specifically to an automatic device for determining the content of manufactured sand and gravel powder. Background Technology

[0002] Manufactured sand is a granular material with a particle size of less than 4.75 mm, produced by crushing and screening natural rocks, ores, or industrial waste using equipment such as crushers. As an important building material, manufactured sand is widely used in engineering construction. Stone powder content is one of the key indicators for evaluating the quality of manufactured sand. Stone powder refers to particles with a particle size of less than 0.075 mm. Excessive stone powder content can lead to increased water demand, reduced workability, decreased strength, and even cracking in building materials. Therefore, accurate and rapid determination of the stone powder content in manufactured sand is crucial.

[0003] Currently, the determination of the stone powder content in manufactured sand mainly relies on traditional laboratory testing methods, using methylene blue reagent. However, this method is complex and subject to many environmental restrictions. To improve the efficiency of determining the stone powder content in manufactured sand, some rapid stone powder content determination devices have emerged on the market. For example, utility model patent CN211179400U discloses a rapid stone powder content determination device for manufactured sand. Based on the differences in stone powder density, particle morphology, and fine particles in manufactured sand, an air-separation method is used to retain stone powder in the fine manufactured sand powder on a slipper within the base to remove the stone powder, thereby roughly estimating the stone powder content in the manufactured sand and achieving rapid determination. However, the operation process of this device is relatively complex, with many manual intervention steps, which not only reduces the determination efficiency but also makes it difficult to ensure the consistency of multiple tests. Utility Model Content

[0004] The purpose of this invention is to provide an automatic device for determining the stone powder content of manufactured sand, which can realize the automatic determination of the stone powder content of manufactured sand, reduce manual intervention, improve the determination efficiency, and thus more accurately and quickly determine the stone powder content in manufactured sand, providing more reliable data for evaluating the quality of manufactured sand.

[0005] This application is achieved through the following technical solution, specifically:

[0006] An automatic device for determining the content of manufactured sand and gravel powder includes: a first screening mechanism, a second screening mechanism disposed below the first screening mechanism, a vibration mechanism connected to the first screening mechanism, support frames installed on both sides of the second screening mechanism, and a control system; the first screening mechanism includes a feed inlet at the top, a screen disposed below the feed inlet, a screen support connected below the screen, and a first weighing sensor installed on the end face of the screen support, and a first discharge outlet at the lower end of the screen support; the second screening mechanism includes multiple slopes arranged in a stepped, staggered manner below the first discharge outlet and a collector disposed at the bottom of the slopes, one end of the slopes tilting downwards and a fan system disposed at the upper end of the slopes in the same direction as the slope; the collector is connected to a second weighing sensor, and the control system is electrically connected to the first weighing sensor, the second weighing sensor, and the vibration mechanism respectively.

[0007] In this scheme, the manufactured sand is initially screened by a first screening mechanism. A vibration mechanism assists in retaining particles larger than the screen mesh size on the screen, and the weight of the residue on the screen is measured by a first weighing sensor. The material smaller than the screen mesh size after screening enters a second screening mechanism. Through a multi-stage landslide and fan system, the difference in density and particle morphology between stone powder and fine manufactured sand particles is used to blow the fine manufactured sand particles to a collector at the bottom of the landslide. The weight of the material in the collector is measured by a second weighing sensor. The control system is electrically connected to the two weighing sensors and the vibration mechanism, enabling automatic control of the vibration mechanism's operation and real-time reading and processing of data from the two weighing sensors, thereby automatically calculating the stone powder content in the manufactured sand. This application enables automatic determination of the stone powder content in manufactured sand, reducing manual intervention and improving measurement efficiency. This allows for more accurate and rapid determination of the stone powder content in manufactured sand, providing more reliable data for evaluating its quality.

[0008] As an improvement to the screen support in this application, the screen support includes a first support and a support body connected between the first support and the screen, and the first weighing sensor is installed at the bottom of the support body.

[0009] Furthermore, the first support is funnel-shaped, and the first discharge port is located at the opening at the bottom of the first support; the screen support also includes a set of second supports symmetrically connected to the inner wall of the first screening mechanism, and the support body is connected between the end face of the second support and the inclined surface of the first support.

[0010] Furthermore, the bottom of the support body is provided with a shock-absorbing mechanism, which includes at least one of an air spring or an elastic shock-absorbing pad.

[0011] As an improvement to the fan system in this application, the fan system includes a plurality of centrifugal nozzles spaced apart along the height direction of the landslide, a vertical air duct connected to the centrifugal nozzles, and a fan, wherein the outlet direction of the centrifugal nozzles is consistent with the tilt direction of the landslide.

[0012] Furthermore, the fan speed is adjustable, and the fan is electrically connected to the control system.

[0013] As an improvement to the screen in this application, the screen includes at least two layers of screens, and the aperture of the lower screen is smaller than that of the upper screen.

[0014] The beneficial effects of this application are as follows:

[0015] The present application's solution involves preliminary screening of manufactured sand using a first screening mechanism. A vibration mechanism assists in retaining particles larger than the screen mesh size on the screen, and the weight of the residue on the screen is measured by a first weighing sensor. Material smaller than the screen mesh size enters a second screening mechanism. Through a multi-stage landslide and blower system, the difference in density and particle morphology between stone powder and fine manufactured sand particles is used to blow the fine manufactured sand particles to a collector at the bottom of the landslide. The weight of the material in the collector is measured by a second weighing sensor. The control system is electrically connected to the two weighing sensors and the vibration mechanism, enabling automatic control of the vibration mechanism's operation and real-time reading and processing of data from the two weighing sensors, thereby automatically calculating the stone powder content in the manufactured sand. This application enables automatic determination of the stone powder content in manufactured sand, reducing manual intervention and improving measurement efficiency. This allows for more accurate and rapid determination of the stone powder content in manufactured sand, providing more reliable data for evaluating its quality.

[0016] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automatic device for determining the content of manufactured sand and gravel powder in an embodiment of this application;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of an automatic device for determining the content of manufactured sand and gravel powder according to an embodiment of this application;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of an automatic measuring device for the content of manufactured sand and gravel powder according to another embodiment of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. First screening mechanism; 2. Second screening mechanism; 11. Feed inlet; 12. Screen; 13. Screen support; 14. First weighing sensor; 15. First discharge outlet; 21. Slide; 22. Collector; 23. Fan system; 24. Second weighing sensor; 131. First support; 132. Support body; 133. Second support; 231. Centrifugal nozzle; 232. Vertical air duct; 233. Fan. Detailed Implementation

[0022] The following will be combined with the appendix Figures 1-3 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] In view of the problems existing in the background technology or products, Figure 1 This invention provides a schematic diagram of the structure of an automatic device for determining the content of manufactured sand and gravel powder according to an embodiment of this application. Figure 2 A cross-sectional structural schematic diagram of an automatic device for determining the content of manufactured sand and gravel powder according to an embodiment of this application is shown. Figure 1 and 2 As shown in the figure, this application provides an automatic device for determining the content of manufactured sand and gravel powder, including: a first screening mechanism 1, a second screening mechanism 2 disposed below the first screening mechanism 1, a vibration mechanism connected to the first screening mechanism 1, a support frame 3 installed on both sides of the second screening mechanism, and a control system; the first screening mechanism 1 includes a feed inlet 11 opened at the top, a screen 12 disposed below the feed inlet 11, a screen support 13 connected below the screen 12, and a first weighing sensor 14 installed on the end face of the screen support 13. The lower end of the screen support 13 is provided with a first discharge port 15; the second screening mechanism 2 includes multiple sections of landslides 21 arranged in a stepped and staggered manner below the first discharge port 15 and a collector 22 disposed at the bottom of the landslides 21. One end of the landslides 21 is inclined downward and the upper end of the landslides 21 is provided with a fan system 23 that is consistent with the inclination direction of the landslides 21; the collector 22 is connected to a second weighing sensor 24, and the control system is electrically connected to the first weighing sensor 14, the second weighing sensor 24 and the vibration mechanism respectively.

[0024] Specifically, the feed inlet 11 is located at the top of the first screening mechanism 1 and is used to receive the manufactured sand material to be tested. A screen 12 is installed below the feed inlet 11. The aperture of the screen 12 is set according to the manufactured sand standard (such as GB / T 14684), for example, a standard screen of 75μm or 150μm can be selected. Preferably, the screen 12 includes at least two layers of screens, and the aperture of the lower screen is smaller than that of the upper screen. A screen support 13 is fixed below the screen 12 to support the screen 12 and transmit vibration. A first weighing sensor 14 is installed on the end face of the screen support 13 to measure the weight of the coarse particles (material larger than the screen aperture) remaining on the screen 12 in real time. A first discharge port 15 is provided at the lower end of the screen support 13, through which the undersized material (fine particles smaller than the screen aperture and stone powder) enters the second screening mechanism 2. In the second screening mechanism 2, multiple landslides 21 are arranged in a stepped and staggered manner, with the end of the upper landslide located directly above the beginning of the lower landslide, forming a continuous material feeding path.

[0025] The control system is electrically connected to the first weighing sensor 14, the second weighing sensor 24, and the vibration mechanism. It is used to control the start and stop of the vibration mechanism and the vibration intensity. By reading the data of the two weighing sensors in real time, it can determine the screening status and calculate the stone powder content. When the values ​​of the weighing sensors are stable, it determines that the screening process has ended, thus avoiding the impact of excessively long or short screening time on screening efficiency and accuracy.

[0026] The vibration mechanism is connected to the screen support 13 and assists in screening through high-frequency vibration to prevent screen clogging and ensure that coarse particles are completely retained on the screen 12. The vibration mechanism can be a conventional vibration device in the art, such as a vibration motor or an ultrasonic transmitter, and this application does not limit it.

[0027] In one implementation, the screen support 13 includes a first support 131 and a support body 132 connected between the first support 131 and the screen 12, wherein the first weighing sensor 14 is installed at the bottom of the support body 132.

[0028] Specifically, to avoid affecting material screening, the first support 131 is a frame structure with its frame connected to the inner wall of the first screening mechanism 1, providing sufficient strength and rigidity to bear the weight of the screen 12 and the material above it. The support body 132 connects the first support 131 and the screen 12, its main function being to transfer the weight of the screen 12 to the first weighing sensor 14 and to ensure the flatness and stability of the screen 12. The shape of the support body 132 can be designed according to the actual application; for example, it can take the form of multiple support rods or support plates. Figure 2The form of the support rod is illustrated. This installation method in this embodiment allows the first weighing sensor 14 to directly bear the weight of the screen 12 and the material above it transmitted by the support 132, enabling more accurate measurement of the weight of the residue on the screen 12.

[0029] Figure 3 A cross-sectional structural schematic diagram of an automatic device for determining the content of manufactured sand and gravel powder according to another embodiment of this application is shown. Figure 3 As shown, in one implementation, the first support 131 is funnel-shaped, and the first discharge port 15 is located at the opening at the lower part of the first support 131; the screen support 13 also includes a set of second supports 133 symmetrically connected to the inner wall of the first screening mechanism 1, and the support body 132 is connected between the end face of the second support 133 and the inclined surface of the first support 131.

[0030] Specifically, the funnel-shaped design of the first support 131 is intended to guide the material passing through the screen 12 to discharge quickly and smoothly, preventing material accumulation inside the first support 131 and facilitating subsequent processing by the second screening mechanism 2. The symmetrically distributed second supports 133 can effectively distribute the weight of the screen 12 and the material above it, reducing the stress concentration on the first support 131 and improving the load-bearing capacity of the entire structure.

[0031] To further improve weighing accuracy, preferably, the bottom of the support 132 is provided with a shock-absorbing mechanism, which includes at least one of an air spring or an elastic shock-absorbing pad. This embodiment further isolates the influence of vibration on the weighing results through the shock-absorbing mechanism, thereby improving weighing stability.

[0032] In one implementation, the fan system 23 includes a plurality of centrifugal nozzles 231 spaced apart along the height direction of the landslide 21, a vertical air duct 232 connected to the centrifugal nozzles 231, and a fan 233, wherein the outlet direction of the centrifugal nozzles 231 is consistent with the tilt direction of the landslide 21.

[0033] Specifically, as the mixture of fine manufactured sand particles and stone powder falls from the first discharge port 15 and slides down multiple sections of landslide 21, the directional airflow generated by the centrifugal nozzles 231 at corresponding positions on each section of landslide 21 acts on the falling material because the outlet direction of the centrifugal nozzles 231 is consistent with the inclination direction of the landslide 21. Under the combined action of gravity and wind force, the fine manufactured sand particles are more likely to move towards the inclined end of the landslide 21, and finally fall into the collector 22 set at the bottom of the landslide 21, leaving the stone powder on the landslide 21. Preferably, the wind speed of the blower 233 is adjustable, and the blower 233 is electrically connected to the control system. Adjustable wind speed of the blower 233 is the key to achieving precise separation control. Stone powder and fine particles of different particle sizes and densities require different airflow velocities to be effectively separated. By adjusting the wind speed of the blower 233, the optimal separation parameters can be selected according to the characteristics of the manufactured sand to be tested, thereby improving separation efficiency and accuracy.

[0034] The following are the test methods for this automatic device for determining the content of manufactured sand and gravel:

[0035] Step 1: Pour the manufactured sand material to be tested into the first screening mechanism 1 through the feed inlet 11.

[0036] Step 2: Start the vibration mechanism and control its vibration intensity and start / stop via the control system. Under vibration, screen 12 sieves the material. Coarse particles larger than the screen aperture remain on screen 12, while fine particles smaller than the screen aperture and stone powder fall into the second screening mechanism 2 through the first discharge port 15. The first weighing sensor 14 measures the weight of the remaining coarse particles on screen 12 in real time, and the control system reads this data in real time.

[0037] Step 3: The mixture of fine manufactured sand particles and stone powder falling from the first discharge port 15 slides down the multi-stage landslide 21 in stages. The centrifugal nozzles 231 of the blower system 23 generate a directional airflow that acts on the sliding material. Under the combined action of gravity and wind force, the fine manufactured sand particles move towards the inclined end of the landslide 21 and eventually fall into the collector 22; the stone powder remains on the landslide 21. The second weighing sensor 24 measures the weight of the fine manufactured sand particles in the collector 22 in real time, and the control system reads this data in real time.

[0038] Determining the end of screening: The control system continuously monitors the data of the first weighing sensor 14 and the second weighing sensor 24. When the values ​​of the two sensors are stable, the screening process is determined to be over, and the vibration mechanism and the fan 233 are stopped.

[0039] Stone powder content calculation:

[0040] 1) Record the weight m1 of the coarse particles remaining on the screen 12 as measured by the first weighing sensor 14;

[0041] 2) Record the weight m2 of the fine particles of manufactured sand in collector 22 as measured by the second weighing sensor 24;

[0042] 3) Calculate the mass m3 of the remaining material (stone powder) on landslide 21. Based on the fact that the total material mass is equal to the sum of the mass of coarse particles, the mass of fine particles and the mass of stone powder, calculate it using m3 = m - m1 - m2.

[0043] 4) Calculate the stone powder content C according to the following formula (1).

[0044] (1)

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic device for determining the content of manufactured sand and gravel powder, characterized in that, include: A first screening mechanism (1), a second screening mechanism (2) disposed below the first screening mechanism (1), a vibration mechanism connected to the first screening mechanism (1), a support frame (3) installed on both sides of the second screening mechanism (2), and a control system; The first screening mechanism (1) includes a feed inlet (11) opened at the top, a screen (12) disposed below the feed inlet (11), a screen support (13) connected to the screen (12) and a first weighing sensor (14) installed on the end face of the screen support (13). The lower end of the screen support (13) is provided with a first discharge port (15). The second screening mechanism (2) includes multiple landslides (21) arranged in a stepped and staggered manner below the first discharge port (15) and a collector (22) set at the bottom of the landslides (21). One end of the landslides (21) is inclined downward and the upper end of the landslides (21) is provided with a fan system (23) that is consistent with the inclination direction of the landslides (21). The collector (22) is connected to a second weighing sensor (24). The control system is electrically connected to the first weighing sensor (14), the second weighing sensor (24) and the vibration mechanism respectively.

2. The automatic device for determining the content of manufactured sand and gravel powder as described in claim 1, characterized in that, The screen support (13) includes a first support (131) and a support (132) connected between the first support (131) and the screen (12), and the first weighing sensor (14) is installed at the bottom of the support (132).

3. The automatic device for determining the content of manufactured sand and gravel powder as described in claim 2, characterized in that, The first support (131) is funnel-shaped, and the first discharge port (15) is located at the opening at the bottom of the first support (131); The screen support (13) further includes a set of second supports (133) symmetrically connected to the inner wall of the first screening mechanism (1), and the support body (132) is connected between the end face of the second support (133) and the inclined surface of the first support (131).

4. An automatic device for determining the content of manufactured sand and gravel powder as described in claim 2 or 3, characterized in that, The bottom of the support (132) is provided with a shock-absorbing mechanism, which includes at least one of an air spring or an elastic shock-absorbing pad.

5. The automatic device for determining the content of manufactured sand and gravel powder as described in claim 1, characterized in that, The fan system (23) includes a plurality of centrifugal nozzles (231) spaced apart along the height direction of the landslide (21), a vertical air duct (232) connected to the centrifugal nozzles (231) and a fan (233), wherein the air outlet direction of the centrifugal nozzles (231) is consistent with the tilt direction of the landslide (21).

6. The automatic device for determining the content of manufactured sand and gravel powder as described in claim 5, characterized in that, The fan (233) has an adjustable wind speed and is electrically connected to the control system.

7. The automatic device for determining the content of manufactured sand and gravel powder as described in claim 1, characterized in that, The screen (12) comprises at least two layers of screens, wherein the aperture of the lower screen is smaller than that of the upper screen.

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