Fineness modulus detection equipment

Abstract

The utility model belongs to the technical field of material granularity detection, and provides fineness modulus detection equipment which comprises a grading unit, a weighing unit and a control unit, the grading unit comprises a plurality of screening machines which are sequentially connected, each screening machine comprises a machine body and a screen arranged in the machine body, and each screening machine is provided with a feeding port and a first discharging port; the weighing unit comprises a first weighing assembly and a second weighing assembly, and the second weighing assembly is connected to a first discharging opening of the screening machine on the rearmost side and used for weighing the weight value of materials discharged by the screening machine; the number of the first weighing assemblies corresponds to the number of the screens, and the first weighing assemblies weigh the weight value of materials on the screen corresponding to the screen; the control unit is connected with the second weighing assembly and the first weighing assembly and obtains the fineness modulus based on the weight value. After screening is completed, the weight of the oversize material and the weight of the final undersize material on the screen can be weighed through the weighing unit, the materials do not need to be guided out and weighed after screening is completed, and therefore the weighing step is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material particle size detection, and particularly relates to a fineness modulus detection device. Background Art

[0002] With the rapid development of the times, the infrastructure industry has developed rapidly, and the demand for sand resources has gradually increased. During the mining process of mineral resources, a large amount of tailings will be produced. If tailings can be used to prepare machine-made sand during the mining and beneficiation process, it can not only reduce the consumption of natural resources but also improve economic benefits. The fineness modulus is an index characterizing the fineness degree and category of the particle size of natural sand. The larger the fineness modulus, the coarser the sand. Therefore, the fineness modulus is an important parameter for measuring the particle size distribution of construction sand and is of great significance for the engineering application of construction sand. The fineness modulus is related to the sieve residue percentage of each grading of sand, that is, related to the mass ratio of each grading of sand.

[0003] In the prior art, the fineness modulus is detected by manually sampling in a silo. After sampling, multi-stage sieving is carried out in sequence, and the operator manually exports and weighs each sieve material after sieving. The manual operation is relatively cumbersome and the detection efficiency is low. Summary of the Utility Model

[0004] The utility model provides a fineness modulus detection device to solve the defect of low detection efficiency in the prior art, realize the detection of the fineness modulus during the preparation process of construction sand, and improve the detection efficiency.

[0005] The utility model provides a fineness modulus detection device, comprising:

[0006] A grading unit, including a plurality of screening machines connected in sequence. The screening machine includes a machine body and at least one layer of sieve mesh arranged in the machine body. The screening machine has a feed inlet and a first discharge outlet. Along the material screening direction, the first discharge outlet of the screening machine located on the front side is connected to the feed inlet of the screening machine located on the adjacent rear side; the sieve hole size of the sieve mesh near the first discharge outlet of the screening machine on the front side is larger than the sieve hole size of the sieve mesh near the feed inlet of the screening machine on the adjacent rear side; when there are multiple layers of sieve meshes arranged in the machine body, the multiple layers of sieve meshes are arranged in sequence from the feed inlet to the first discharge outlet and the sieve hole sizes gradually decrease;

[0007] A weighing unit, including a first weighing component and a second weighing component. The second weighing component is connected to the first discharge outlet of the last screening machine, and the second weighing component is used to weigh the weight value of the sieved material; the number of the first weighing components corresponds to the number of the sieve meshes, the first weighing components are connected to the corresponding sieve meshes, and the first weighing components are used to weigh the weight value of the oversize material on the corresponding sieve meshes;

[0008] A control unit, which is respectively connected to the second weighing component and the first weighing component, and is configured to obtain the fineness modulus based on the weight value.

[0009] According to a fineness modulus detection device provided by the present invention, the sieve mesh has a second discharge port, the second discharge port is communicated with the corresponding first weighing component, and a discharge valve is arranged at the second discharge port.

[0010] According to a fineness modulus detection device provided by the present invention, the first weighing component includes:

[0011] A first bin, the first bin is connected to the second discharge port through a feeding pipeline;

[0012] A first weighing sensor, which is arranged at the bottom of the first bin.

[0013] According to a fineness modulus detection device provided by the present invention, it further includes a conveying and transferring component. A discharge port is arranged at the bottom of the first bin, and a discharge valve is arranged at the discharge port;

[0014] The conveying and transferring component is configured to collect and transport the oversize materials discharged from the discharge port.

[0015] According to a fineness modulus detection device provided by the present invention, the screening machine is a vibratory screen, and the height of the first discharge port of the screening machine located at the front side is higher than the height of the feeding port of the screening machine located at the adjacent rear side.

[0016] According to a fineness modulus detection device provided by the present invention, each layer of sieve mesh is provided with an ultrasonic transducer.

[0017] According to a fineness modulus detection device provided by the present invention, the control unit is connected to the discharge valve, the discharge valve and the ultrasonic transducer.

[0018] According to a fineness modulus detection device provided by the present invention, the first weighing component is located below the classification unit, and the conveying and transferring component is located below the first weighing component.

[0019] According to a fineness modulus detection device provided by the present invention, adjacent two screening machines are connected through a vibrating feeder.

[0020] According to a fineness modulus detection device provided by the present invention, the number of sieve meshes is 6 layers. Along the material screening direction, the sieve hole sizes of the 6 layers of sieve meshes are 4 mm - 5 mm, 2 mm - 3 mm, 1 mm - 2 mm, 0.5 mm - 1 mm, 0.2 mm - 0.5 mm, 0.01 mm - 0.2 mm respectively.

[0021] The fineness modulus detection device provided by the utility model allows materials to enter through the feed inlet of the frontmost screening machine and be sequentially screened through the screening meshes of multiple screening machines to complete the screening of the materials. The weight values corresponding to the oversize materials on multiple layers of screening meshes are obtained through multiple first weighing components, and the weight value of the finally screened undersize materials is obtained by the second weighing component. The control unit can obtain the fineness modulus of the materials based on each weight value. In this way, automatic screening of the materials can be achieved, and after the screening is completed, the weight of the oversize materials on the screening mesh and the weight of the finally screened undersize materials can be weighed by the weighing unit, without the need to export the materials for weighing after screening, thus simplifying the weighing steps and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the fineness modulus detection device provided by the present utility model.

[0024] Figure 2 is Figure 1 A partial enlarged structural diagram at position A in

[0025] Reference numerals: 100, screening machine; 110, machine body; 111, feed inlet; 112, first discharge port; 120, screening mesh; 121, second discharge port; 130, ultrasonic transducer; 101, first screening machine; 102, second screening machine; 103, third screening machine; 200, first weighing component; 210, first bin; 220, first weighing sensor; 300, second weighing component; 400, conveying and transferring component; 500, conveying component; 600, fixing bracket; 700, vibrating feeder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will further describe in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0027] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0029] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] The following is combined with Figure 1 and Figure 2Describe the fineness modulus detection device according to the embodiments of the present invention.

[0032] An embodiment of the present invention provides a fineness modulus detection device, as Figure 1 and Figure 2 shown. The fineness modulus detection device includes a classification unit, a weighing unit, and a control unit.

[0033] The classification unit includes a plurality of screening machines 100 connected in sequence. The screening machine 100 includes a machine body 110 and at least one layer of sieve mesh 120 disposed in the machine body 110. The screening machine 100 has a feed inlet 111 and a first discharge outlet 112. Along the material screening direction, the first discharge outlet 112 of the front-side screening machine 100 is connected to the feed inlet 111 of the adjacent rear-side screening machine 100.

[0034] The weighing unit includes a first weighing assembly 200 and a second weighing assembly 300. The second weighing assembly 300 is connected to the first discharge outlet 112 of the last screening machine 100, and the second weighing assembly 300 is used to weigh the weight value of the screened material; the number of the first weighing assemblies 200 corresponds to the number of the sieve meshes 120, and the first weighing assembly 200 is connected to the corresponding sieve mesh 120. The first weighing assembly 200 is used to weigh the weight value of the oversize material on the corresponding sieve mesh 120.

[0035] The control unit (not shown in the figure) is respectively connected to the second weighing assembly 300 and the first weighing assembly 200, and the control unit is used to obtain the fineness modulus based on the weight value.

[0036] It can be understood that a plurality of screening machines 100 are connected in sequence along the material screening direction. The sieve mesh 120 in the screening machine 100 can be one layer or multiple layers. When the sieve mesh 120 in the screening machine 100 is one layer, the sieve hole sizes of the sieve meshes 120 in the adjacent two screening machines 100 gradually decrease along the material screening direction; when there are multiple layers of sieve meshes 120 in the machine body 110, the multiple layers of sieve meshes 120 in each screening machine 100 are arranged in sequence from the feed inlet 111 to the first discharge outlet 112 and the sieve hole sizes gradually decrease. Among the adjacent two screening machines 100, the sieve hole size of the sieve mesh 120 near the first discharge outlet 112 of the front-side screening machine 100 is larger than the sieve hole size of the sieve mesh 120 near the feed inlet 111 of the adjacent rear-side screening machine 100.

[0037] The material enters through the feed inlet 111 of the foremost screening machine 100, is screened by the sieve mesh 120 in the foremost screening machine 100, and then enters the next screening machine 100. In this way, the material is sequentially screened by the sieve meshes 120 of multiple screening machines 100, and the screened material after being screened by the last screening machine 100 is output to the first discharge outlet 112 of the last screening machine 100.

[0038] Each layer of the sieve mesh 120 is connected with a first weighing component 200. The oversize materials on multiple layers of sieve meshes 120 are weighed respectively through multiple first weighing components 200 to obtain the weight values corresponding to the oversize materials on the multiple layers of sieve meshes 120. And the second weighing component 300 is connected to the first discharge port 112 of the rearmost screening machine 100 to weigh the undersize materials and obtain the weight value of the undersize materials.

[0039] The control unit obtains the weight value of the second weighing component 300 and the weight values corresponding to multiple first weighing components 200, and analyzes and calculates all the weight values to obtain the fineness modulus of the material.

[0040] For the fineness modulus detection device provided by the embodiment of the present utility model, the material enters through the feed port 111 of the foremost screening machine 100, and is sequentially screened by the sieve meshes 120 of multiple screening machines 100 to complete the screening of the material. The weight values corresponding to the oversize materials on multiple layers of sieve meshes 120 are obtained through multiple first weighing components 200, and the weight value of the finally obtained undersize materials is obtained by the second weighing component 300. The control unit can obtain the fineness modulus of the material based on each weight value. In this way, the automatic screening of the material can be realized, and after the screening is completed, the weight of the oversize materials on the sieve mesh 120 and the weight of the finally obtained undersize materials can be weighed by the weighing unit, without exporting and weighing the material after the screening is completed, thereby simplifying the weighing steps and improving the detection efficiency.

[0041] In an embodiment of the present utility model, the screening machine 100 adopts a vibrating screen. The height of the foremost screening machine 100 is higher than that of the adjacent rear screening machine 100. Then the grading unit is composed of vibrating screens distributed in a ladder shape, and the material is graded by a physical screening method.

[0042] Specifically, along the material screening direction, the height of the first discharge port 112 of the foremost screening machine 100 is higher than the height of the feed port 111 of the adjacent rear screening machine 100.

[0043] Exemplarily, as Figure 1 shown, the grading unit includes three screening machines 100 which are sequentially connected and distributed in a ladder shape. The three screening machines 100 are denoted as the first screening machine 101, the second screening machine 102 and the third screening machine 103 which are arranged in sequence along the material screening direction. The first discharge port 112 of the first screening machine 101 is connected to the feed port 111 of the second screening machine 102, and the first discharge port 112 of the second screening machine 102 is connected to the feed port 111 of the third screening machine 103.

[0044] The material enters the first screening machine 101 through the feed inlet 111 of the first screening machine 101, is screened by the screen mesh 120 inside the first screening machine 101, then exits through the first discharge outlet 112 of the first screening machine 101, and enters the second screening machine 102 from the feed inlet 111 of the second screening machine 102. After being screened by the screen mesh 120 inside the second screening machine 102, it exits through the first discharge outlet 112 of the second screening machine 102, and enters the third screening machine 103 from the feed inlet 111 of the third screening machine 103. The screened material after being screened by the screen mesh 120 inside the third screening machine 103 exits through the first discharge outlet 112 of the third screening machine 103 and enters the second weighing component 300 for weighing.

[0045] In an embodiment of the present utility model, there is a material transportation component between two adjacent screening machines 100. Along the material screening direction, the material transportation component transports the screened material from the first discharge outlet 112 of the previous screening machine 100 to the feed inlet 111 of the next screening machine 100, and the material transportation component uses a vibrating feeding method for transportation.

[0046] Optionally, two adjacent screening machines 100 are connected by a vibrating feeder 700.

[0047] For example, taking the first screening machine 101 and the second screening machine 102 as an example, the screened material from the first discharge outlet 112 of the first screening machine 101 is transported to the feed inlet 111 of the second screening machine 102 through the vibrating feeder 700. The inlet of the vibrating feeder 700 is connected to the first discharge outlet 112 of the first screening machine 101, and the outlet of the vibrating feeder 700 is connected to the feed inlet 111 of the second screening machine 102.

[0048] In an alternative embodiment of the present utility model, as Figure 1 and Figure 2 shown, each layer of the screen mesh 120 is provided with an ultrasonic transducer 130. The ultrasonic transducer 130 can convert other forms of energy into ultrasonic energy and transmit it to the single-layer screen mesh 120 of the rotary vibrating screen to improve the screening efficiency.

[0049] It can be understood that the ultrasonic transducer 130 is an important device for improving the screening efficiency. The frequency of the ultrasonic transducer 130 is adjustable, and different intensities of ultrasonic excitation can be adjusted for screen meshes 120 with different screen hole sizes.

[0050] Optionally, the control unit is electrically connected to the ultrasonic transducer 130, and the frequency of the ultrasonic transducer 130 is adjusted through the control unit.

[0051] In an embodiment of the present utility model, the sieve mesh 120 has a second discharge port 121, and the second discharge port 121 communicates with the corresponding first weighing assembly 200. A discharge valve is provided at the second discharge port 121. Preferably, the discharge valve is a pneumatic inward-opening valve, and a design for preventing material leakage such as leather and rubber is provided inside the valve.

[0052] It can be understood that each layer of sieve mesh 120 is equipped with a second discharge port 121 and a discharge valve. When the sieve mesh 120 is performing the screening operation, the discharge valve can be in a closed state; after the sieve mesh 120 finishes screening, the discharge valve is opened to discharge the oversize material on the sieve mesh 120 through the second discharge port 121 to the first weighing assembly 200 for weighing the oversize material of the corresponding sieve mesh 120.

[0053] Optionally, the first weighing assembly 200 includes a first bin 210 and a first weighing sensor 220. The first bin 210 is connected to the second discharge port 121 through a feeding pipeline; the first weighing sensor 220 is disposed at the bottom of the first bin 210, and the accuracy of the first weighing sensor 220 can be adjusted according to the application scenario.

[0054] Among them, the feeding pipeline is a conveying hose. The first bin 210 collects the oversize material on the corresponding sieve mesh 120, and weighs the oversize material collected by the first bin 210 through the first weighing sensor 220 to obtain the weight value of the oversize material on the corresponding sieve mesh 120.

[0055] It can be understood that the first bin 210 is connected to the second discharge port 121 of the sieve mesh 120 through a feeding pipeline to weigh the weight of the oversize material discharged from a single layer of sieve mesh 120 online, so as to realize the online real-time weighing of the oversize material, without manual export for weighing, thereby realizing the online rapid detection of the fineness modulus and avoiding the detection error caused by the existing export.

[0056] Furthermore, the control unit is electrically connected to the discharge valves of each sieve mesh 120 to realize the automatic control of closing the second discharge ports 121 of each sieve mesh 120, and further realize the automatic control of collecting the oversize material on the sieve mesh 120.

[0057] In an embodiment of the present utility model, a discharge port is provided at the bottom of the first bin 210, and a discharge valve is provided at the discharge port.

[0058] It can be understood that when the first bin 210 collects the oversize materials on the screen, the discharge valve is closed and the outlet valve is opened. The oversize materials on the screen 120 are collected into the first bin 210 through the second outlet 121, and the first weighing sensor 220 at the bottom of the first bin 210 weighs the oversize materials in real time. After weighing is completed, the discharge valve is opened to discharge the oversize materials in the first bin 210. After the oversize materials in the first bin 210 are discharged, the discharge valve is closed to facilitate the next weighing. It should be noted here that after weighing or after the oversize materials are completely discharged, the outlet valve resets to the closed state to facilitate the next operation.

[0059] Optionally, the control unit is electrically connected to each discharge valve to achieve automatic control. For example, the discharge valve adopts a butterfly valve and is pneumatically controlled, which is convenient for discharging the oversize materials after weighing is completed.

[0060] Exemplarily, the control unit is set as a PLC control system, which cooperates with the first weighing sensor 220 and pneumatic valves to control the orderly operation of the entire device, and analyzes and calculates the weighing values to obtain the fineness modulus of the material. Specifically, the PLC control system controls the opening and closing of the ultrasonic waves corresponding to each layer of screen 120, the opening and closing of the outlet valves corresponding to each layer of screen 120, and the opening and closing of the butterfly valves at the bottom of the bins.

[0061] It should be noted that the second weighing assembly 300 adopts the same structure as the first weighing assembly 200. Of course, in other embodiments, the first outlet 112 of the rearmost screening machine 100 is provided on the side wall of the machine body 110, and the second weighing assembly 300 is provided below the first outlet 112. The undersize materials discharged from the first outlet 112 can be directly collected by the second weighing assembly 300, and the conveying pipeline can be omitted. A butterfly valve is also provided at the bottom of the bin of the second weighing assembly 300 and is pneumatically controlled by the control unit. After the weighing of the second weighing assembly 300 is completed, the butterfly valve of the second weighing assembly 300 is opened, and the materials are collected and transported through the conveying assembly 500. The conveying assembly 500 can adopt a discharge belt.

[0062] In an alternative embodiment of the present utility model, as Figure 1 shown, the detection device of this embodiment further includes a conveying and transferring assembly 400, which is used to collect the oversize materials discharged from the discharge port.

[0063] It can be understood that after the first weighing sensor 220 completes the weighing of the oversize materials in the first bin 210, the discharge port is opened, and the conveying and transferring assembly 400 collects the oversize materials discharged from the discharge port and transports the oversize materials.

[0064] Optionally, the first weighing assembly 200 is located below the grading unit, and the conveying and transferring assembly 400 is located below the first weighing assembly 200. The conveying and transferring assembly 400 collects the oversize materials after screening by different screen meshes 120 and stably transports all the oversize materials for recycling and transfer.

[0065] Exemplarily, the grading unit includes three screening machines 100. The three screening machines 100 are arranged on a fixed support 600. The three screening machines 100 are denoted as the first screening machine 101, the second screening machine 102, and the third screening machine 103 arranged in sequence from left to right along the material screening direction. The heights of the first screening machine 101, the second screening machine 102, and the third screening machine 103 decrease in sequence.

[0066] Two layers of screen meshes 120 are arranged in each screening machine 100, and two corresponding first weighing assemblies 200 are arranged on the lower side of each screening machine 100. The two first weighing assemblies 200 are respectively connected to the second discharge ports 121 of the two layers of screen meshes 120. Preferably, the second discharge ports 121 of the two layers of screen meshes 120 are arranged in a horizontal offset manner.

[0067] A total of 6 first weighing assemblies 200 are arranged on the lower side of the three screening machines 100. The first weighing assemblies 200 are located below the fixed support 600. The conveying and transferring assembly 400 includes a transfer belt arranged on the lower side of the 6 first weighing assemblies 200. After the first weighing sensor 220 completes weighing the oversize materials in the first bin 210, the discharge port is opened, and the oversize materials in the first bin 210 fall to the transfer belt through the discharge port. By driving the transfer belt to rotate, the oversize materials on the 6 layers of screen meshes 120 corresponding to the 6 first weighing assemblies 200 are transported to discharge from the detection device.

[0068] In an embodiment of the present utility model, the grading unit includes three screening machines 100. The three screening machines 100 are denoted as the first screening machine 101, the second screening machine 102, and the third screening machine 103 arranged in sequence along the material screening direction. Two layers of screen meshes 120 are arranged in each screening machine 100. Then, the detection device of this embodiment has a total of 6 layers of screen meshes 120. Along the material screening direction, the screen hole sizes of the 6 layers of screen meshes 120 are 4 mm - 5 mm, 2 mm - 3 mm, 1 mm - 2 mm, 0.5 mm - 1 mm, 0.2 mm - 0.5 mm, and 0.01 mm - 0.2 mm respectively.

[0069] Specifically, the screen mesh 120 is set as a square hole woven screen mesh 120, and a dust cover is arranged on each layer of screen mesh 120. Along the material screening direction, the screen hole sizes of the 6 layers of screen meshes 120 are 4.75 mm, 2.36 mm, 1.18 mm, 0.6 mm, 0.3 mm, and 0.15 mm respectively.

[0070] An example working process of the fineness modulus detection device of the present utility model:

[0071] After the equipment is debugged, set the operating parameters according to the material particle size. The specific setting method of the operating parameters can refer to Table 1 below.

[0072] Table 1

[0073]

[0074] Take about 1 kg of material and feed it into the first screening machine from the feed inlet. The material can be obtained by automatic sampling on the production line through an on-line belt sampler or by manual sampling.

[0075] Click to run the equipment on the equipment operation interface. During the operation of the equipment, through the central control system screen, observe the quality changes of the screened material in the bin of the second weighing component and the oversize material in the first bin of each first weighing component at any time. After the operation is completed, the central control system will record the weighing values after the bins are stabilized. Click the analysis and calculation button to calculate the fineness modulus, and the fineness modulus of the material can be obtained. In this embodiment, three groups of fineness modulus data are given, and the specific fineness modulus detection results are shown in Table 2 below.

[0076] Table 2

[0077] 。

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A fineness modulus detection device, characterized in that, Including: A grading unit, including a plurality of screening machines (100) connected in sequence. The screening machine (100) includes a machine body (110) and at least one layer of screen mesh (120) disposed within the machine body (110). The screening machine (100) has a feed inlet (111) and a first discharge outlet (112). Along the material screening direction, the first discharge outlet (112) of the screening machine (100) located on the front side is connected to the feed inlet (111) of the screening machine (100) located on the adjacent rear side. The screen hole size of the screen mesh (120) of the screening machine (100) on the front side near the first discharge outlet (112) is larger than the screen hole size of the screen mesh (120) of the screening machine (100) on the adjacent rear side near the feed inlet (111). When there are multiple layers of the screen mesh (120) disposed within the machine body (110), the multiple layers of the screen mesh (120) are arranged in sequence from the feed inlet (111) to the first discharge outlet (112) and the screen hole sizes gradually decrease; A weighing unit, including a first weighing component (200) and a second weighing component (300). The second weighing component (300) is connected to the first discharge outlet (112) of the last screening machine (100). The second weighing component (300) is used to weigh the weight value of the screenings. The number of the first weighing components (200) corresponds to the number of the screen meshes (120). The first weighing component (200) is connected to the corresponding screen mesh (120). The first weighing component (200) is used to weigh the weight value of the oversize material on the corresponding screen mesh (120); A control unit, respectively connected to the second weighing component (300) and the first weighing component (200). The control unit is used to obtain the fineness modulus based on the weight value.

2. The fineness modulus detection device according to claim 1, characterized in that, The screen mesh (120) has a second discharge outlet (121). The second discharge outlet (121) communicates with the corresponding first weighing component (200). The second discharge outlet (121) is provided with a discharge valve.

3. The fineness modulus detection device according to claim 2, characterized in that The first weighing component (200) includes: A first bin (210), which is connected to the second discharge outlet (121) through a material conveying pipeline; A first weighing sensor (220), disposed at the bottom of the first bin (210).

4. The fineness modulus detection device according to claim 3, characterized in that, It further includes a conveying and transferring component (400). A discharge port is provided at the bottom of the first bin (210). The discharge port is provided with a discharge valve; The conveying and transferring component (400) is used to collect and transport the oversize material discharged from the discharge port.

5. The fineness modulus detection device according to claim 4, characterized in that, The screening machine (100) is a vibratory screen. The height of the first discharge outlet (112) of the screening machine (100) located on the front side is higher than the height of the feed inlet (111) of the screening machine (100) located on the adjacent rear side.

6. The fineness modulus detection device according to claim 5, characterized in that, Each layer of the screen mesh (120) has an ultrasonic transducer (130).

7. The fineness modulus detection device according to claim 6, characterized in that, The control unit is connected to the discharge valve, the discharge valve and the ultrasonic transducer (130).

8. The fineness modulus detection device according to claim 4, wherein, The first weighing assembly (200) is located below the grading unit, and the conveying and transferring assembly (400) is located below the first weighing assembly (200).

9. The fineness modulus detection device according to any one of claims 1 to 8, characterized in that, Adjacent two screening machines (100) are connected by a vibrating feeder (700).

10. The fineness modulus detection device according to any one of claims 1 to 8, characterized in that, The number of the sieve meshes (120) is six layers. Along the material screening direction, the sieve hole sizes of the six layers of sieve meshes (120) are 4 mm - 5 mm, 2 mm - 3 mm, 1 mm - 2 mm, 0.5 mm - 1 mm, 0.2 mm - 0.5 mm, and 0.01 mm - 0.2 mm respectively.

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