A centrifugal indoor multi-stage screening device suitable for fine-grained materials

Abstract

The present invention discloses a centrifugal indoor multi-stage screening instrument suitable for fine-grained materials, comprising a sealed screen body, on which a multi-stage screening system is adopted, the multi-stage screening system comprising a centrifugal variable-aperture drum installed in the sealed screen body, which is driven to rotate by a rotating motor placed on the top of the sealed screen body to perform a centrifugal screening process of the material; the wall surface of the variable-aperture drum is provided with sieve holes distributed in a regular matrix, and the sieve holes adopt a combined structure to control the change of aperture. The present invention adopts a variable-aperture screening system to achieve a multi-particle continuous screening function and greatly reduce the volume of the equipment; utilizes a centrifugal drum to increase the material screening efficiency; combines the design of a dual-vibration drive motor, a unidirectional pneumatic system and a nano-composite ceramic coating to greatly reduce the error of the screening result caused by the adsorption of microparticles, and the centrifugal multi-stage screening system has many advantages such as simple structure, high screening efficiency, clean and environmental protection, etc., which greatly meets the screening needs of indoor fine-grained materials.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, in particular to a centrifugal indoor multi-stage screening device suitable for fine-grained materials. Background Art

[0002] In the scientific research, production, laboratories and quality inspection rooms of chemical, pharmaceutical, geological and building materials departments, the precise screening, filtration and detection of the particle size structure of granular and powdery materials are of vital importance.

[0003] Screening, filtering, and testing of fine-grained materials primarily utilizes sieves with varying apertures. Particles smaller than the test sieve mesh are screened into the lower test sieve, leaving only particles larger than the mesh size within each test sieve. This layer-by-layer screening process ultimately achieves separation of different particle sizes and determines the particle size composition of the material. However, conventional indoor test screening devices present the following challenges: ① The multiple layers of screens arranged spatially inevitably increase the device's size, contradicting the principle of compactness and practicality for indoor testing equipment. ② The disassembly, assembly, and weighing of the screened material at each level are cumbersome and can easily lead to confusion in particle screening results. ③ During the screening process, large particles and the screen mesh structure inevitably adsorb microparticles and powdered materials, prolonging screening time and causing variations in the quality of the screened material, ultimately reducing the accuracy of screening, filtration, and testing. Therefore, efficient, rapid, and accurate screening of fine-grained materials has become a pressing challenge for those skilled in the art.

[0004] This case was created to solve the above problems. Summary of the Invention

[0005] Technical problems solved

[0006] In view of the shortcomings of the prior art, the present invention provides a centrifugal indoor multi-stage screening device suitable for fine-grained materials, which solves the problems raised in the above-mentioned background technology.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a centrifugal indoor multi-stage screening instrument suitable for fine-grained materials, including a sealed screen body, on which a multi-stage screening system is installed, the multi-stage screening system including a centrifugal variable-aperture drum installed in the sealed screen body, which is driven to rotate by a rotating motor placed on the top of the sealed screen body, the wall surface of the variable-aperture drum is provided with sieve holes distributed in a regular matrix, and the sieve holes adopt a variable-aperture combination structure to control the change of aperture, wherein the variable-aperture combination structure uses a vertical single column as the basic unit and is evenly distributed around the circumference of the sealed screen body, the variable-aperture combination structures of each column are connected in series, and the aperture of the sieve holes is uniformly adjusted by synchronously changing the sieve hole linkage rods of all columns.

[0009] Preferably, the variable aperture combination structure is placed on the inner side of the variable aperture drum wall, and each variable aperture combination structure includes a control panel, a movable cover plate, and a limiting base, wherein each limiting base corresponds to a sieve hole, and the movable cover plate is arranged in a plurality of circumferential directions around the center of the limiting base, and one end is pivotally connected to the limiting base at the corresponding position; the control panel is rotatably covered on one side of the limiting base, and the axial center lines of the two coincide; the outer ends of the movable cover plates are connected to a cylindrical transmission rod; a strip groove for embedding the cylindrical transmission rod is correspondingly opened on the control panel, so that the movable cover plate is indirectly driven to rotate during the rotation of the control panel.

[0010] Preferably, an adjusting rod is connected to the outside of the control panel, the directions of the adjusting rods on each column of variable aperture combination structures are consistent, and multiple adjusting rods in each column are connected to a connecting rod, wherein the connection between each adjusting rod and the corresponding connecting rod adopts a hinged connection method, and the connecting rods are fixedly connected to the upper lifting adjustment ring. By adjusting the height of the lifting adjustment ring to synchronously drive all the adjusting rods to move upward, and then drive the control panel to rotate, the synchronous change of the diameter of the outer peripheral surface of the variable aperture roller is achieved.

[0011] The aperture of the sieve can be continuously changed within the range of Φ0.85~4.75mm.

[0012] The lifting and lowering adjustment ring is driven by conventional electric drive, which can achieve up and down movement. It should be noted that the aperture change size of this solution is small, and the deflection (rotation) of the adjustment rod driven by the up and down movement of the connecting rod is extremely small.

[0013] Preferably, the sealed screen body includes a detachable screen cover, an open-door upper screen body, a funnel-shaped lower screen body, and a storage box, wherein the screen cover is plugged into the upper screen body, the storage box is snap-connected to the lower screen body, and a filter is provided at the bottom of the storage box; the lower end of the open-door upper screen body is open, and the funnel-shaped lower screen body is connected and communicated with the upper and lower parts.

[0014] Preferably, the multi-stage screening system includes a rotating motor, wherein a roller sealing cover is snap-connected to the centrifugal variable aperture roller; the rotating motor is placed on the upper side of the screen cover, and its output end is connected to the roller sealing cover, thereby driving the centrifugal variable aperture roller to rotate around its axis.

[0015] Preferably, the centrifugal variable aperture drum is fixedly connected to the funnel-shaped lower screen body through a support rod, and vibration motors are symmetrically distributed in the outer space of the funnel-shaped lower screen body to provide vibration loads of different amplitudes and frequencies for the instrument.

[0016] Preferably, a one-way pneumatic system is provided at the upper end of the sealed screen body, which includes an air intake fan and a one-way air guide groove. The air intake fans are evenly distributed on the outside of the sealed screen body at intervals of 120°. The one-way air guide groove surrounds the top of the sealed screen body 360° and is spatially consistent with the air intake fan. The air intake fan provides one-way airflow of different intensities to the inside of the equipment through the one-way air guide groove.

[0017] Preferably, the one-way air guide groove has a narrow cavity with a concave middle part, and the upper and lower ends of the narrow cavity are in contact with the inner wall of the sealing screen body. An annular horizontal opening is opened at the upper end, and the horizontal opening is connected to the interior, cooperating with the upper and lower ends of the narrow cavity, so that the airflow passes through the narrow wall and is guided downward by the horizontal opening.

[0018] Preferably, the bottom side of the sealing screen body is connected to a base, which includes a support spring and a base. The support spring connects the base to the sealing screen body, and the side of the base has a square hollow structure. The bottom of the base is made of high-friction plastic material to prevent the instrument from shifting during operation.

[0019] Beneficial effects

[0020] By adopting the above technical solution, the present invention offers the following advantages over existing technologies: It utilizes a variable aperture screening system to achieve continuous multi-particle screening and significantly reduces equipment volume; utilizes a centrifugal drum to increase material screening efficiency; and, incorporating a dual-vibration drive motor, a unidirectional pneumatic system, and a nano-composite ceramic coating, significantly reduces screening error caused by microparticle adsorption. Its enclosed structure minimizes dust emission, meeting the requirements of green, clean, and environmentally friendly construction. This centrifugal multi-stage screening system offers numerous advantages, including a simple structure, high screening efficiency, and a clean, environmentally friendly design, making it a highly suitable solution for indoor screening of fine-grained materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the present invention opening / door opening;

[0023] Figure 3This is a cross-sectional view of the sealing screen body of the present invention;

[0024] Figure 4 This is a schematic diagram of the variable aperture roller structure of the present invention;

[0025] Figure 5 Schematic diagram of the variable aperture drum screen surface of the present invention;

[0026] Figure 6 This is a disassembled schematic diagram of the variable aperture drum screen surface of the present invention;

[0027] Figure 7 Schematic diagram of the variable aperture combination structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the interior of the variable aperture combination structure of the present invention;

[0029] Figure 9 This is a disassembled schematic diagram of the variable aperture combination structure of the present invention;

[0030] Figure 10 Schematic cross-sectional view of the one-way pneumatic system of the present invention;

[0031] Figure 11 It is a schematic diagram of the one-way pneumatic system of the present invention.

[0032] In the figure: 100, sealed screen body; 101, screen cover; 102, upper screen body; 103, lower screen body; 104, storage box; 200, one-way pneumatic system; 201, air intake fan; 202, one-way air guide trough; 203, horizontal opening; 300, multi-stage screening system; 301, rotating motor; 302, drum sealing cover; 303, variable aperture drum; 304, support rod; 305, vibration motor; 306, control knob; 307, sieve hole; 3031, adjustment rod; 3032, control panel; 3033, movable cover; 3034, limit base; 3035, columnar transmission rod; 3036, strip groove; 3037, connecting rod; 3038, lifting adjustment ring; 400, base; 401, support spring; 402, base. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0034] like Figure 1-11 As shown: A centrifugal indoor multi-stage screening device suitable for fine-grained materials mainly includes a sealed screen body 100, a one-way pneumatic system 200, a multi-stage screening system 300, and a base 400, a total of four parts, as shown in FIG. Figure 1 As shown, the various systems work together to complete the efficient, fast and precise screening of fine-grained materials.

[0035] According to the above scheme, the sealing screen body 100 is as follows Figure 1 The device comprises a removable screen cover 101, an open-door upper screen body 102, a funnel-shaped lower screen body 103, and a storage box 104. The interior of the sealed screen body 100 is coated with a nano-composite ceramic coating, which has anti-adsorption and ultra-low friction properties, preventing material particles from adsorbing or remaining on the inner surface of the sealed screen body 100. The removable screen cover 101 facilitates the removal and installation of the centrifugal removable variable-aperture drum 303, allowing for material inlet and outlet control. The open-door upper screen body 102 is connected to the door structure, which is 1 / 3 of the total circumference, via a hinge, facilitating internal cleaning and maintenance. The storage box 104 is connected to the funnel-shaped lower screen body 103 by a snap-on connection. The bottom of the storage box uses a highly breathable, highly adsorbent filter screen, which has an excellent collection function for fine material particles.

[0036] According to the above solution, the one-way pneumatic system 200 is as follows: Figure 2 , including an air intake fan 201 and a one-way air guide groove 202. The air intake fan 201 is evenly distributed at an interval of 120° on the outside of the open upper screen body 102, providing unidirectional driven airflow of different intensities for the inside of the equipment; the one-way air guide groove 202 surrounds the top of the sealed screen body 100 at 360°, and is consistent with the air intake fan 201 in space, mainly in terms of horizontal height. The air intake fan 201 is controlled by different gears to form airflows of different intensities. The narrow cavity at the front end of the one-way air guide groove 202 forces the high-pressure airflow to form a one-way airflow from the top of the equipment downward, ensuring that the material particles enter the storage box 104 quickly and efficiently.

[0037] The one-way air guide groove 202 has a narrow cavity with a concave middle part. The upper and lower ends of the narrow cavity fit into the inner wall of the sealed screen body 100. The upper end is provided with a circular horizontal opening 203, which is connected to the interior. The upper and lower ends of the narrow cavity fit into the inner wall of the sealed screen body, so that the airflow can quickly flow through the horizontal opening and be guided downward to form a one-way airflow after a short stay in the narrow cavity.

[0038] According to the above scheme, the multi-stage screening system 300 is as follows Figure 2 As shown, it includes a rotating motor 301, a roller sealing cover 302, a centrifugal variable aperture roller 303, a support rod 304, a vibration motor 305, and a control knob 306. The roller sealing cover 302 is snap-connected to the centrifugal variable aperture roller 303. The rotating motor 301 can provide different speed power to the centrifugal variable aperture roller 303; the centrifugal variable aperture roller 303 is fixedly connected to the funnel-shaped lower screen body 103 through the support rod 304.

[0039] The wall of the centrifugal variable-aperture drum 303 is provided with sieve holes 307 distributed in a regular matrix. The sieve holes 307 adopt a variable aperture combination structure and are adjusted in series by a transmission. The control knob 306 can continuously change the range of Φ0.85~4.75mm; the vibration motor 305 is fixed to the outside of the funnel-shaped lower screen body 103 and is spatially symmetrically distributed, providing the instrument with vibration loads of different amplitudes and frequencies to reduce the error caused by residual material particles on the wall and improve screening efficiency.

[0040] According to the above scheme, the centrifugal variable aperture roller 303 is as follows Figure 3 The implementation method is as follows: the variable aperture component includes an adjustment rod 3031, a control panel 3032, a movable cover plate 3033, and a limiting base 3034. A strip-shaped groove structure on the control panel 3032 mates with a cylindrical transmission rod on the upper portion of the movable cover plate 3033. The adjustment rod 3031 controls the rotation of the control panel 3032. A cylindrical structure on the lower portion of the movable cover plate 3033 mates with a groove on the limiting base 3034. The control panel 3032 causes the movable cover plate 3033 to move regularly, achieving aperture variation. More optimally, by increasing the number of movable cover plates 3033, a sieve aperture with a more circular structure can be formed.

[0041] Specifically, an adjustment rod 3031 is connected to the outside of the control panel 3032. The directions of the adjustment rods on each column of the variable aperture combination structure are consistent, and multiple adjustment rods in each column are connected to a connecting rod 3037. The upper side of the connecting rod 3037 is a lifting adjustment ring 3038. By adjusting the height of the lifting adjustment ring 3038, all the adjustment rods 3031 can be synchronously driven to move up and down, thereby driving the control panel 3032 to rotate, thereby realizing the synchronous change of the hole diameter of the variable aperture drum wall.

[0042] According to the above scheme, the base 400 includes a support spring 401 and a base 402. The support spring connects the base 402 to the upper multi-stage screening system 300; the side of the base 402 has a square hollow structure to facilitate the installation and disassembly of the storage box 104. The bottom of the base 402 is made of high-friction plastic material to prevent the instrument from shifting during operation.

[0043] A method for using a centrifugal multi-stage indoor screening device suitable for fine-grained minerals comprises the following steps:

[0044] Step 1: Place the instrument on a stable platform and debug the equipment. Adjust the control knob 306 to adjust the centrifugal detachable variable aperture roller 303 to the minimum value of 0.85 mm;

[0045] Step 2: Remove the detachable screen cover 101 and pour the fine stone into the centrifugal detachable variable aperture drum 303. After installing the detachable screen cover 101, start the one-way pneumatic system 200 and turn on the rotating motor 301 until the set target time ends;

[0046] Step 3: Remove the detachable storage box 104 to collect the sieve material. After the collection is completed, reinstall the detachable storage box 104, rotate the control knob 306 to the next set value and start the rotating motor 301 again;

[0047] Step 4: Repeat step 3 to continuously adjust the aperture size of the centrifugal variable aperture roller 303 to the set maximum value;

[0048] Step 5: After the screening work is completed, remove the detachable screen cover 101 and remove the drum to complete the collection of large particles of abnormal materials; open the door-type upper screen body 102 to clean and maintain the instrument, and reset the instrument.

[0049] The above description is based on the embodiments for inspiration. Through the above description, relevant personnel can make various changes and modifications without departing from the scope of the invention. The technical scope of this new type of use is not limited to the content of the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A centrifugal indoor multi-stage screening device suitable for fine-grained materials, characterized by: It includes a sealed screen body, on which a multi-stage screening system is installed. The multi-stage screening system includes a centrifugal variable aperture drum installed in the sealed screen body, which is driven to rotate by a rotating motor placed on the top of the sealed screen body to perform a centrifugal screening process of the material; the wall surface of the variable aperture drum is provided with sieve holes distributed in a regular matrix, and the sieve holes adopt a variable aperture combination structure to change the aperture, wherein the variable aperture combination structure uses a vertical single row as the basic unit and is evenly distributed around the circumference of the sealed screen body, and the variable aperture combination structures of each row are connected in series, through the same Step by step, the sieve hole linkage rods of all rows are changed to achieve uniform adjustment of the sieve hole diameter; the variable aperture combination structure is placed on the inner side of the variable aperture drum wall, and each variable aperture combination structure includes a control panel, a movable cover plate, and a limit base, wherein each limit base corresponds to a sieve hole; the movable cover plate is arranged in a plurality of pieces circumferentially around the center of the limit base, and one end is pivotally connected to the limit base at the corresponding position; the control panel is rotatably covered on one side of the limit base, and the axis lines of the two coincide; the outer ends of the movable cover plates are connected to a columnar transmission rod; the control panel is provided with a strip groove for embedding the columnar transmission rod, so that the movable cover plate is indirectly driven to rotate during the rotation of the control panel; the outer side of the control panel is connected to an adjustment rod, the direction of the adjustment rods on each row of variable aperture combination structures is consistent, and multiple adjustment rods in each row are connected to a linkage rod, wherein the connection between each adjustment rod and the corresponding connecting rod adopts a hinged connection method, and the upper side of each of the circumferentially arranged linkage rods is fixedly connected to the lifting adjustment ring; the sealing screen body includes a disassembly a screen cover, an open-door upper screen body, a funnel-shaped lower screen body, and a storage box, wherein the screen cover is plugged into the upper screen body, the storage box is snap-connected to the lower screen body, and a filter screen is provided at the bottom of the storage box; the lower end of the open-door upper screen body is open, and the funnel-shaped lower screen body is connected to and communicates with the upper and lower parts; the multi-stage screening system includes a rotating motor, wherein a centrifugal variable aperture drum is snap-connected to a drum sealing cover; the rotating motor is placed on the upper side of the screen cover, and its output end is connected to the drum sealing cover, thereby driving the centrifugal variable aperture drum to rotate around its axis; The upper end of the sealed screen body is provided with a one-way pneumatic system, which includes an air intake fan and a one-way air guide groove. The air intake fan is evenly distributed on the outside of the sealed screen body at intervals of 120°; the one-way air guide groove surrounds the top of the sealed screen body 360° and is spatially consistent with the air intake fan. The air intake fan provides one-way airflow of different intensities to the inside of the equipment through the one-way air guide groove; the one-way air guide groove has a narrow cavity with a concave middle part, and the upper and lower ends of the narrow cavity are in contact with the inner wall of the sealed screen body. A circular horizontal opening is opened at its upper end, and the horizontal opening is connected to the interior.

2. A centrifugal indoor multi-stage screening device suitable for fine-grained materials according to claim 1, characterized in that: The aperture of the sieve holes is continuously changed within the range of Φ0.85-4.75 mm.

3. The centrifugal indoor multi-stage screening device for fine-grained materials according to claim 1, characterized in that: The centrifugal variable aperture drum is fixedly connected to the funnel-shaped lower screen body through a support rod; vibration motors are symmetrically distributed in the outer space of the funnel-shaped lower screen body to provide vibration loads of different amplitudes and frequencies for the instrument.

4. A centrifugal indoor centrifugal pump suitable for fine-grained materials according to claim 1 Multi-stage screening device, characterized by: The lower side of the sealing screen body is connected to a base, which includes a supporting spring and a base. The supporting spring connects the base to the sealing screen body, and the side of the base has a square hollow structure.

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