Method for automatic screening of test sand and dust

Abstract

The present application relates to a method for automatically screening test sand and dust. The device used in the method for automatically screening test sand and dust described in the present application includes a feeding mechanism, a screening mechanism and a sealed cavity. The feeding mechanism includes a feeding container and a feeding control valve. The feeding container is provided with a discharge port, and the feeding control valve is arranged at the discharge port. The screening mechanism includes a driving unit, a transmission member, a material receiving assembly and a plurality of screening assemblies with different screening specifications. The plurality of screening assemblies are sequentially arranged at intervals below the discharge port, and the screening assemblies are arranged from top to bottom in the order of screening large-sized sand and dust to small-sized sand and dust. The output end of the driving unit is connected to each screening assembly through a transmission member, and the material receiving assembly is arranged below the lowest screening assembly. The feeding mechanism and the screening mechanism are arranged inside the sealed cavity. The method for automatically screening test sand and dust described in the present application has the advantages of low labor cost and high efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of sand and dust screening equipment, and in particular to a method for automatically screening test sand and dust. Background Art

[0002] The sand and dust test is a method for testing products or materials under simulated harsh environmental conditions. Its purpose is to determine the suitability of various products such as military and civilian equipment, electronic products, automotive parts, and building materials for flying sand and dust environments, and to evaluate their wear resistance, corrosion resistance, and sealing performance, etc., providing an important reference for product design, material selection, and quality control. In order to meet the requirements of the test standards, the sand and dust used in the sand and dust test must be screened.

[0003] At present, the screening of sand and dust is done manually by testers, which requires a large workload, takes a long time to screen, and has high labor costs, greatly reducing the test efficiency. Moreover, the manual screening of sand and dust will generate a large amount of dust, which will have a certain impact on the respiratory system and is not conducive to the health of testers. Summary of the invention

[0004] Based on this, it is necessary to provide a method for automatic screening of test sand and dust to address the problems of low efficiency, high cost and harm to workers' health in manual screening of sand and dust.

[0005] In a first aspect, an automatic screening test sand and dust device is provided, comprising:

[0006] A feeding mechanism, the feeding mechanism comprising a feeding container and a feeding control valve, the feeding container is provided with a discharge port, and the feeding control valve is arranged at the discharge port;

[0007] A screening mechanism, the screening mechanism comprising a driving unit, a transmission member, a material receiving assembly and a plurality of screening assemblies with different screening specifications, the plurality of screening assemblies are sequentially arranged at intervals below the material outlet, and the screening assemblies are arranged from top to bottom in the order of screening large-sized sand and dust to small-sized sand and dust, the output end of the driving unit is connected to each of the screening assemblies through the transmission member, and the material receiving assembly is arranged below the lowest screening assembly; and,

[0008] A sealed cavity, wherein the feeding mechanism and the screening mechanism are arranged inside the sealed cavity.

[0009] In one embodiment, the screening assembly includes a screen, a first demand container, a first storage container, a first control valve and a second control valve. The sealed cavity is provided with a mounting groove, and the screen is detachably installed in the mounting groove. The two ends of the screen are respectively provided with a first output port and a second output port. The first control valve is installed at the first output port, and the second control valve is installed at the second output port. The first demand container is arranged at a vertical projection position corresponding to the first output port, and the first storage container is arranged at a vertical projection position corresponding to the second output port.

[0010] In one embodiment, the material receiving assembly includes a transition material receiving container, a second demand container, a second storage container, a third control valve and a fourth control valve. The transition material receiving container is arranged below the lowest screen, the transition material receiving container is provided with a third output port and a fourth output port, the third control valve is installed at the third output port, the fourth control valve is installed at the fourth output port, the second demand container is arranged at a vertical projection position corresponding to the third output port, and the second storage container is arranged at a vertical projection position corresponding to the fourth output port.

[0011] In one of the embodiments, connecting parts are provided at the centers of two opposite sides of the screen, and the connecting parts are rotatably mounted in the mounting grooves. The driving unit drives the screen to rotate with the connecting parts as the rotation center.

[0012] In one embodiment, the driving unit includes a first motor and a second motor, and the transmission member includes a first pulling wire and a second pulling wire, one end of the first pulling wire is connected to the first motor, and the other end of the first pulling wire is connected to one end of the screen, one end of the second pulling wire is connected to the second motor, and the other end of the second pulling wire is connected to the other end of the screen.

[0013] In one of the embodiments, the feeding mechanism further includes a sand and dust quantity monitor, which is disposed in the feeding container and is used to monitor the remaining amount of sand and dust in the feeding container.

[0014] In one embodiment, the screening assembly further comprises a first weight monitor and a second weight monitor, wherein the first weight monitor is disposed in the first demand container and the second weight monitor is disposed in the first storage container;

[0015] The material receiving assembly further includes a third weight monitor and a fourth weight monitor, wherein the third weight monitor is disposed at the second demand container, and the fourth weight monitor is disposed at the second storage container.

[0016] In one embodiment, the automatic screening test sand and dust device also includes a controller, and the feeding control valve, the first control valve, the second control valve, the third control valve, the fourth control valve, the first weight monitor, the second weight monitor, the third weight monitor, the fourth weight monitor, the sand and dust amount monitor and the drive unit are all electrically connected to the controller.

[0017] In a second aspect, the present application further provides a method for automatically screening test sand and dust, which is applicable to the automatic screening test sand and dust device described in any of the above embodiments, and comprises the following steps:

[0018] Install the screens into the installation slot from top to bottom according to the screening diameter from large to small;

[0019] Pour the sand and dust to be screened into the feeding container;

[0020] Setting the screening frequency and time of the screen, and the weight of sand and dust that the first demand container and the second demand container need to load;

[0021] Start the driving unit to drive the screen to perform automatic screening;

[0022] If the amount of sand and dust in the feeding container is insufficient during the screening process, add sand and dust to the feeding container;

[0023] If the first storage container or the second storage container is prompted to reach the upper weight limit during the screening process, the sand and dust in the first storage container or the second storage container that has reached the upper weight limit will be emptied;

[0024] When it is prompted that both the first demand container and the second demand container meet the set weight, the screening is completed.

[0025] In one embodiment, the automatic screening further includes the following steps:

[0026] The feeding control valve automatically adjusts the opening and closing time and frequency according to the set screening frequency and time. When the feeding control valve is opened, part of the sand and dust falls onto the first layer of screen;

[0027] The screen shakes according to the set screening frequency and time, and the driving unit lifts one end of the screen through the transmission part to shake;

[0028] Open the first control valve to pour the sand and dust that cannot pass through the screen layer into the first demand container of the layer. When the sand and dust weight in the first demand container of the layer reaches the set weight, the first control valve of the layer is closed, and then the second control valve of the layer is opened to pour the sand and dust that cannot pass through the screen layer into the first storage container of the layer for storage, and the sand and dust that passes through the screen layer falls into the next screen layer.

[0029] If the screening assembly is not equipped with a screen, the first control valve, the second control valve, the first weight monitor and the second weight monitor of the screening assembly will be in a closed state;

[0030] Until the sand and dust that can pass through all the screens enters the transition material receiving container, the third control valve is opened, and the transition material receiving container preferentially transports the sand and dust to the second demand container. When the sand and dust weight in the second demand container reaches the set weight, the third control valve is closed, and then the fourth control valve is opened, and the sand and dust that passes through all the screens will be transported to the second storage container for storage;

[0031] The automatic screening is completed until it is prompted that both the first demand container and the second demand container meet the set weight.

[0032] The above-mentioned method for automatically screening test sand and dust is to place the sand and dust to be screened in the feeding container by setting a feeding mechanism and a screening mechanism. The feeding control valve can control the switch of the discharge port, thereby controlling the amount of sand and dust added to the screening component. Multiple screening components are arranged from top to bottom in the order of screening large-sized sand and dust to small-sized sand and dust, that is, the screening components of each layer leave the sand and dust that cannot pass through the layer, and the sand and dust that pass through automatically fall to the next layer for screening of smaller sizes, so that each layer of automatic screening components can screen out sand and dust of different sizes, and finally all the sand and dust that pass through falls into the receiving component, and sand and dust of different sizes for the experiment can be obtained. The test personnel do not need to manually screen the sand and dust, and the screening time is fast, which has the advantages of low labor cost and high efficiency. Moreover, the feeding mechanism and the screening mechanism are arranged in a sealed cavity, and the dust raised during the screening of sand and dust will not affect the environment, thereby ensuring the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic structural diagram of an automatic screening test sand and dust device according to an embodiment of the present application.

[0034] FIG2 is a schematic structural diagram of a screening component of an automatic screening test sand and dust device according to an embodiment of the present application.

[0035] FIG3 is a schematic structural diagram of a material receiving assembly of an automatic screening test sand and dust device according to an embodiment of the present application.

[0036] Figure Number:

[0037] 100, feeding mechanism; 110, feeding container; 111, feeding pipeline; 110A, discharge port; 120, feeding control valve; 130, sand and dust amount monitor;

[0038] 200, screening mechanism; 210, driving unit; 211, first motor; 212, second motor; 220, transmission member; 221, first lifting wire; 222, second lifting wire; 230, screening assembly; 231, screen; 231A, first output port; 231B, second output port; 2311, connecting part; 2312, first output pipe; 2313, second output pipe; 232, first demand container; 233, first storage container; 234 , first control valve; 235, second control valve; 236, first weight monitor; 237, second weight monitor; 240, material receiving assembly; 241, transition material receiving container; 241A, third output port; 241B, fourth output port; 2411, third output pipeline; 242, second demand container; 243, second storage container; 244, third control valve; 245, fourth control valve; 246, third weight monitor; 247, fourth weight monitor;

[0039] 300, sealing cavity; 300A, mounting groove;

[0040] 400, controller; 410, signal control line. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0047] Referring to FIG. 1 , FIG. 1 shows a schematic diagram of the structure of an automatic screening test sand and dust device in an embodiment of the present application. The automatic screening test sand and dust device includes a feeding mechanism 100, a screening mechanism 200 and a sealed cavity 300. The feeding mechanism 100 includes a feeding container 110 and a feeding control valve 120. The feeding container 110 is provided with a discharge port 110A, and the feeding control valve 120 is arranged at the discharge port 110A. The screening mechanism 200 includes a driving unit 210, a transmission member 220, a material receiving assembly 240 and a plurality of screening assemblies 230 with different screening specifications. The plurality of screening assemblies 230 are sequentially arranged at intervals below the discharge port 110A, and the screening assemblies 230 are arranged from top to bottom in the order of screening large-sized sand and dust to small-sized sand and dust. The output end of the driving unit 210 is connected to each screening assembly 230 through the transmission member 220, and the material receiving assembly 240 is arranged below the lowest screening assembly 230. The feeding mechanism 100 and the screening mechanism 200 are arranged inside the sealed cavity 300. Specifically, the feeding container 110 is an inverted cone-shaped funnel with a smooth inner wall, and the discharge port 110A is arranged at the bottom of the funnel. When sand and dust are placed in the feeding container 110, they can easily slide to the bottom to avoid blockage by sand and dust.

[0048] The automatic screening test dust device described in the embodiment of the present application places the dust to be screened in the feeding container 110 by setting a feeding mechanism 100 and a screening mechanism 200. The feeding control valve 120 can control the switch of the discharge port 110A, thereby controlling the amount of dust poured into the screening component 230. Multiple screening components 230 are arranged from top to bottom in the order of screening large-sized dust to small-sized dust. Then the driving unit 210 vibrates each layer of the screening components 230 through the transmission member 220. That is, the screening components 230 of each layer retain the dust that cannot pass through the layer, and the dust that passes through automatically falls to the screening components 230 of the next layer for screening of a smaller size, so that each layer of the screening components 230 automatically screens out dust of different sizes. Finally, the dust that passes through all the screening components 230 falls into the receiving component 240, and dust of different sizes for experiments can be obtained.

[0049] The automatic screening test dust device described in the embodiment of the present application automatically screens out dust of different sizes by setting the screening components 230 of different screening sizes to shake, so that the test personnel do not need to manually screen the dust, the screening time is fast, and it has the advantages of low labor cost and high efficiency. Moreover, the feeding mechanism 100 and the screening mechanism 200 are arranged in the sealed cavity 300, and the dust generated during the screening of dust will not affect the environment, thereby protecting the health of the staff.

[0050] In combination with Figure 2, Figure 2 shows a structural schematic diagram of the screening component 230 of the automatic screening test sand and dust device in an embodiment of the present application. In some embodiments, the screening component 230 includes a screen 231, a first demand container 232, a first storage container 233, a first control valve 234 and a second control valve 235. The sealed cavity 300 is provided with a mounting groove 300A, and the screen 231 is detachably installed in the mounting groove 300A. The two ends of the screen 231 are respectively provided with a first output port 231A and a second output port 231B. The first control valve 234 is installed at the first output port 231A, and the second control valve 235 is installed at the second output port 231B. The first demand container 232 is set at a vertical projection position corresponding to the first output port 231A, and the first storage container 233 is set at a vertical projection position corresponding to the second output port 231B. By installing the screen 231 detachably, it is convenient to replace the screens 231 of different sizes. When the screen 231 shakes and screens out the sand dust larger than the hole, the first control valve 234 opens the first output port 231A to pour the screened sand dust into the first demand container 232. Since the test sand dust is sand dust of different sizes modulated in a certain proportion, the demand for each size of sand dust is different. The first demand container 232 is used to install the sand dust screened by the corresponding screen 231. When the screened sand dust reaches the required weight, the first output port 231A is closed, but at this time, the sand dust of other sizes may not reach the required weight, so it is necessary to continue screening, and the second output port 231B is opened by the second control valve 235, so that the extra sand dust that continues to be screened is poured into the first storage container 233, so that the sand dust of this size is stored. The sand dust used for the test and the excess sand dust are installed respectively by the first demand container 232 and the first storage container 233, and the test sand dust is quickly screened, which has the advantages of convenience and speed.

[0051] In an optional embodiment, as shown in FIG2 , connecting parts 2311 are provided at the centers of the two opposite sides of the screen 231, and the connecting parts 2311 are rotatably mounted in the mounting groove 300A, and the driving unit 210 drives the screen 231 to rotate with the connecting parts 2311 as the rotation center. By mounting the connecting parts 2311 on the two side edges in the mounting groove 300A, the two ends of the screen 231 can reciprocate, and a vibration effect is formed under the high-frequency reciprocating drive of the driving unit 210, so that sand and dust can quickly pass through the screen 231, thereby improving the screening efficiency.

[0052] In an optional embodiment, as shown in FIG1 , the driving unit 210 includes a first motor 211 and a second motor 212, and the transmission member 220 includes a first lifting wire 221 and a second lifting wire 222, one end of the first lifting wire 221 is connected to the first motor 211, the other end of the first lifting wire 221 is connected to one end of the screen 231, one end of the second lifting wire 222 is connected to the second motor 212, and the other end of the second lifting wire 222 is connected to the other end of the screen 231. The first motor 211 and the second motor 212 are respectively and rapidly alternately pulled to pull the first lifting wire 221 and the second lifting wire 222, so that the two ends of the screen 231 connected to the first lifting wire 221 and the second lifting wire 222 are rapidly and slightly reciprocated to form a vibration effect.

[0053] In an optional embodiment, as shown in FIG2 , the screening component 230 further includes a first weight monitor 236 and a second weight monitor 237, wherein the first weight monitor 236 is disposed in the first demand container 232, and the second weight monitor 237 is disposed in the first storage container 233. The first weight monitor 236 can monitor the carrying weight of the first demand container 232, and when it is detected that the first demand container 232 has reached the required amount, the first control valve 234 can be immediately closed in linkage, while the second weight monitor 237 monitors the carrying weight of the first storage container 233, obtains the carrying condition of the first storage container 233 in real time, and avoids overflow due to exceeding the maximum carrying capacity of the first storage container 233, which has the advantage of high degree of automation.

[0054] In an optional embodiment, as shown in Figure 3, the material receiving component 240 includes a transition material receiving container 241, a second demand container 242, a second storage container 243, a third control valve 244 and a fourth control valve 245. The transition material receiving container 241 is arranged below the lowermost screen 231, and the transition material receiving container 241 is provided with a third output port 241A and a fourth output port 241B. The third control valve 244 is installed at the third output port 241A, and the fourth control valve 245 is installed at the fourth output port 241B. The second demand container 242 is arranged at a vertical projection position corresponding to the third output port 241A, and the second storage container 243 is arranged at a vertical projection position corresponding to the fourth output port 241B. After the sand and dust pass through all the screening components 230, they will finally fall into the transition material receiving container 241. The third output port 241A is opened through the third control valve 244 to allow the sand and dust finally screened out to enter the second demand container 242 first. When the sand and dust in the second demand container 242 reaches the required amount of test sand and dust, the third control valve 244 is closed, and then the fourth control valve 245 is opened to allow the excess sand and dust generated to be output to the second storage container 243 through the fourth output port 241B, so as to conveniently separate the sand and dust required for the test from the excess sand and dust, thereby improving the experimental efficiency.

[0055] In an optional embodiment, as shown in FIG3 , the material receiving assembly 240 further includes a third weight monitor 246 and a fourth weight monitor 247, wherein the third weight monitor 246 is disposed at the second demand container 242, and the fourth weight monitor 247 is disposed at the second storage container 243. Similarly, the third weight monitor 246 can monitor the carrying weight of the second demand container 242, and when it is detected that the second demand container 242 has reached the required amount, the third control valve 244 can be immediately closed in linkage, while the fourth weight monitor 247 monitors the carrying weight of the second storage container 243, obtains the carrying condition of the second storage container 243 in real time, and avoids overflow due to exceeding the maximum carrying capacity of the second storage container 243, which has the advantage of high degree of automation.

[0056] In an optional embodiment, as shown in Fig. 1, the feeding container 110 includes a feeding pipe 111, which is disposed at the bottom of the feeding container 110 and is connected to the discharge port 110A. By disposing the feeding pipe 111, the feeding pipe 111 can be aligned with the screen 231 below, thereby reducing the probability of sand and dust being spilled during feeding.

[0057] Further, as shown in Fig. 2 and Fig. 3, the screen 231 also includes a first output pipe 2312 and a second output pipe 2313, which are respectively arranged at the two ends of the screen 231, and the first output pipe 2312 is connected to the first output port 231A, and the second output pipe 2313 is connected to the second output port 231B. The transition receiving container 241 includes a third output pipe 2411, and the third output port 241A and the fourth output port 241B are arranged in the third output pipe 2411. By arranging the first output pipe 2312, the second output pipe 2313 and the third output pipe 2411, the screened sand and dust can be more accurately transferred to the first demand container 232, the first storage container 233, the second demand container 242 and the second storage container 243, so as to avoid the sand and dust of different sizes from being mixed together.

[0058] In an optional embodiment, as shown in FIG1 , the feeding mechanism 100 further includes a sand and dust amount monitor 130, which is disposed in the feeding container 110 and is used to monitor the remaining amount of sand and dust in the feeding container 110. By arranging the sand and dust amount monitor 130 in the feeding container 110, when the sand and dust in the feeding container 110 is almost consumed, the sand and dust amount monitor 130 will issue a reminder, so that the staff can replenish the sand and dust.

[0059] In an optional embodiment, as shown in FIG1 , the automatic screening test sand and dust device further includes a controller 400, and the feeding control valve 120, the first control valve 234, the second control valve 235, the third control valve 244, the fourth control valve 245, the first weight monitor 236, the second weight monitor 237, the third weight monitor 246, the fourth weight monitor 247, the sand and dust amount monitor 130 and the drive unit 210 are all electrically connected to the controller 400. Specifically, the controller 400 is electrically connected to each component via a signal control line 410. By setting the controller 400 to control each process of feeding, screening and collecting sand and dust, the automatic screening test sand and dust device can automatically complete the screening work, greatly improving the test efficiency.

[0060] On the other hand, the present application also provides a method for automatically screening test sand and dust, which is applicable to the automatic screening test sand and dust device described in any of the above embodiments, comprising the following steps:

[0061] Install the screen 231 from top to bottom into the installation slot 300A according to the screening diameter from large to small;

[0062] Pour the sand and dust to be screened into a feeding container 110;

[0063] Setting the screening frequency and time of the screen 231, and the weight of sand and dust that the first demand container 232 and the second demand container 242 need to load;

[0064] Start the driving unit 210 to drive the screen 231 to perform automatic screening;

[0065] If it is indicated during the screening process that the amount of sand and dust in the feeding container 110 is insufficient, add sand and dust to the feeding container 110;

[0066] If the first storage container 233 or the second storage container 243 reaches the upper weight limit during the screening process, the sand and dust in the first storage container 233 or the second storage container 243 that has reached the upper weight limit will be emptied;

[0067] When it is indicated that both the first demand container 232 and the second demand container 242 meet the set weight, the screening is completed.

[0068] The method for automatically screening test sand and dust described in the embodiment of the present application is to install a screen 231 according to the size requirements of the screening, and to feed sand and dust through the feeding container 110. Different parameters can be set according to the screening requirements. The driving unit 210 drives the screening components 230 of different screening sizes to shake, thereby automatically screening out sand and dust of different sizes. If there is a lack of sand and dust, a prompt will be issued to add it. When the sand and dust of each size reaches the test amount, the screening can be completed. The test personnel do not need to manually screen the sand and dust, the screening time is fast, and it has the advantages of low labor cost and high efficiency. Moreover, the feeding mechanism 100 and the screening mechanism 200 are arranged in the sealed cavity 300, and the dust generated when screening the sand and dust will not affect the environment, thereby protecting the health of the staff.

[0069] In an optional embodiment, the method for automatically screening test sand dust further comprises the following steps during the automatic screening:

[0070] The feeding control valve 120 automatically adjusts the opening and closing time and frequency according to the set screening frequency and time. When the feeding control valve 120 is opened, part of the sand and dust falls onto the first layer of screen 231;

[0071] The screen 231 is shaken according to the set screening frequency and time, and the driving unit 210 lifts one end of the screen 231 through the transmission member 220 to shake;

[0072] Open the first control valve 234 to pour the sand and dust that cannot pass through the screen 231 of this layer into the first demand container 232 of this layer. When the sand and dust in the first demand container 232 of this layer reaches the set weight, the first control valve 234 of this layer is closed, and then open the second control valve 235 of this layer to pour the sand and dust that cannot pass through the screen 231 of this layer into the first storage container 233 of this layer for storage, and the sand and dust that passes through the screen 231 of this layer falls into the screen 231 of the next layer.

[0073] If the screen assembly 230 is not equipped with the screen 231, the first control valve 234, the second control valve 235, the first weight monitor 236 and the second weight monitor 237 of the screen assembly 230 will be in a closed state;

[0074] Until the sand and dust that can pass through all the screens 231 enter the transition material receiving container 241, the third control valve 244 is opened, and the transition material receiving container 241 preferentially transports the sand and dust to the second demand container 242. When the sand and dust in the second demand container 242 reaches the set weight, the third control valve 244 is closed, and then the fourth control valve 245 is opened, and the sand and dust that pass through all the screens 231 will be transported to the second storage container 243 for storage;

[0075] The automatic screening is completed until it is prompted that both the first demand container 232 and the second demand container 242 meet the set weight.

[0076] The method for automatically screening test sand and dust described in this embodiment controls the first control valve 234, the second control valve 235, the third control valve 244 and the fourth control valve 245 to separately store the test amount of sand and dust of each size and the excess screening amount, so that the screened sand and dust can be directly used for the test, thereby improving the efficiency of the test.

[0077] The device and method for automatically screening test sand and dust described in the embodiments of the present application have the following beneficial effects:

[0078] 1. By setting the screening components 230 of different screening sizes to shake, sand and dust of different sizes can be automatically screened out, and the test personnel do not need to manually screen the sand and dust, and the screening time is fast, which has the advantages of low labor cost and high efficiency. In addition, the feeding mechanism 100 and the screening mechanism 200 are arranged in the sealed cavity 300, and the dust generated when screening the sand and dust will not affect the environment, thereby protecting the health of the staff.

[0079] 2. The sand and dust used for the test and the excess sand and dust are installed separately through the first demand container 232 and the first storage container 233, so that the test sand and dust can be quickly screened, which has the advantages of convenience and speed.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for automatically screening test sand and dust, characterized in that: The steps include: Install the screens (231) from top to bottom in the installation groove (300A) according to the screening diameter from large to small; Pour the sand and dust to be screened into a feeding container (110); Setting the screening frequency and time of the screen (231), and the weight of sand and dust to be loaded in the first demand container (232) and the second demand container (242); Starting the driving unit (210) to drive the screen (231) to perform automatic screening; If it is indicated during the screening process that the amount of sand and dust in the feeding container (110) is insufficient, adding sand and dust to the feeding container (110); If it is indicated during the screening process that the first storage container (233) or the second storage container (243) has reached the upper weight limit, the sand and dust in the first storage container (233) or the second storage container (243) that has reached the upper weight limit is emptied; When it is indicated that both the first demand container (232) and the second demand container (242) meet the set weight, the screening is completed; The method further comprises the following steps during automatic screening: The feeding control valve (120) automatically adjusts the opening and closing time and frequency according to the set screening frequency and time. When the feeding control valve (120) is opened, part of the sand and dust falls onto the first layer of screen (231); The screen (231) is shaken according to a set screening frequency and time, and the driving unit (210) lifts one end of the screen (231) through the transmission member (220) to shake; The first control valve (234) is opened to pour the sand and dust that cannot pass through the screen (231) of this layer into the first demand container (232) of this layer. When the sand and dust in the first demand container (232) of this layer reaches a set weight, the first control valve (234) of this layer is closed, and then the second control valve (235) of this layer is opened to pour the sand and dust that cannot pass through the screen (231) of this layer into the first storage container (233) of this layer for storage, and the sand and dust that passes through the screen (231) of this layer falls into the screen (231) of the next layer. If the screening assembly (230) is not equipped with the screen (231), the first control valve (234), the second control valve (235), the first weight monitor (236) and the second weight monitor (237) of the screening assembly (230) will be in a closed state; Until the sand and dust that can pass through all the screens (231) enter the transition material receiving container (241), the third control valve (244) is opened, and the transition material receiving container (241) preferentially transports the sand and dust to the second demand container (242); when the sand and dust in the second demand container (242) reaches a set weight, the third control valve (244) is closed, and then the fourth control valve (245) is opened, and the sand and dust that can pass through all the screens (231) is transported to the second storage container (243) for storage; Automatic screening is completed until it is prompted that both the first demand container (232) and the second demand container (242) meet the set weight; Wherein, the device used in the method includes: A feeding mechanism (100), the feeding mechanism (100) comprising a feeding container (110) and a feeding control valve (120), the feeding container (110) being provided with a discharge port (110A), and the feeding control valve (120) being arranged at the discharge port (110A); A screening mechanism (200), the screening mechanism (200) comprising a driving unit (210), a transmission member (220), a material receiving assembly (240), and a plurality of screening assemblies (230) of different screening specifications, the plurality of screening assemblies (230) being sequentially arranged at intervals below the material outlet (110A), and the screening assemblies (230) being arranged from top to bottom in the order of screening large-sized sand and dust to small-sized sand and dust, the output end of the driving unit (210) being connected to each of the screening assemblies (230) via the transmission member (220), and the material receiving assembly (240) being arranged below the lowest screening assembly (230); and A sealed cavity (300), wherein the feeding mechanism (100) and the screening mechanism (200) are arranged inside the sealed cavity (300); The screening assembly (230) comprises a screen (231), a first demand container (232), a first storage container (233), a first control valve (234) and a second control valve (235); the sealed cavity (300) is provided with a mounting groove (300A); the screen (231) is detachably mounted in the mounting groove (300A); two ends of the screen (231) are respectively provided with a first output port (231A) and a second output port (231B); the first control valve (234) is mounted at the first output port (231A); the second control valve (235) is mounted at the second output port (231B); the first demand container (232) is arranged at a projection position corresponding to the first output port (231A) in a vertical direction; and the first storage container (233) is arranged at a projection position corresponding to the second output port (231B) in a vertical direction; The material receiving assembly (240) comprises a transition material receiving container (241), a second demand container (242), a second storage container (243), a third control valve (244) and a fourth control valve (245); the transition material receiving container (241) is arranged below the lowest screen (231); the transition material receiving container (241) is provided with a third output port (241A) and a fourth output port (241B); the third control valve (244) is installed at the third output port (241A); the fourth control valve (245) is installed at the fourth output port (241B); the second demand container (242) is arranged at a position corresponding to the projection of the third output port (241A) in a vertical direction; and the second storage container (243) is arranged at a position corresponding to the projection of the fourth output port (241B) in a vertical direction; The screening assembly (230) further comprises a first weight monitor (236) and a second weight monitor (237), wherein the first weight monitor (236) is arranged in the first demand container (232), and the second weight monitor (237) is arranged in the first storage container (233); The material receiving assembly (240) further comprises a third weight monitor (246) and a fourth weight monitor (247), wherein the third weight monitor (246) is arranged on the second demand container (242), and the fourth weight monitor (247) is arranged on the second storage container (243); The device further comprises a controller (400), and the feeding control valve (120), the first control valve (234), the second control valve (235), the third control valve (244), the fourth control valve (245), the first weight monitor (236), the second weight monitor (237), the third weight monitor (246), the fourth weight monitor (247) and the driving unit (210) are all electrically connected to the controller (400).

2. The method for automatically screening test sand and dust according to claim 1, characterized in that: The feeding container (110) is an inverted cone-shaped funnel, and the inner wall of the feeding container (110) is smooth, and the discharge port (110A) is arranged at the bottom of the funnel.

3. The method for automatically screening test sand and dust according to claim 1, characterized in that: Connecting parts (2311) are provided at the centres of two opposite sides of the screen (231); the connecting parts (2311) are rotatably mounted on the mounting groove (300A); and the driving unit (210) drives the screen (231) to rotate with the connecting parts (2311) as the rotation centre.

4. The method for automatically screening test sand and dust according to claim 3, characterized in that: The driving unit (210) includes a first motor (211) and a second motor (212); the transmission member (220) includes a first lifting wire (221) and a second lifting wire (222); one end of the first lifting wire (221) is connected to the first motor (211), and the other end of the first lifting wire (221) is connected to one end of the screen (231); one end of the second lifting wire (222) is connected to the second motor (212), and the other end of the second lifting wire (222) is connected to the other end of the screen (231).

5. The method for automatically screening test sand and dust according to claim 1, characterized in that: The feeding mechanism (100) further comprises a sand and dust quantity monitor (130), wherein the sand and dust quantity monitor (130) is arranged on the feeding container (110), and the sand and dust quantity monitor (130) is used to monitor the remaining amount of sand and dust in the feeding container (110).

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