CN114653487A - Centrifugal indoor multistage screening instrument suitable for fine-grained materials - Google Patents

Abstract

The invention discloses a centrifugal indoor multi-stage screening instrument suitable for fine-grained materials, which comprises a sealed screen body, wherein a multi-stage screening system is adopted on the sealed screen body, and comprises a centrifugal variable-aperture roller arranged in the sealed screen body and driven to rotate by a rotating motor arranged at the top of the sealed screen body, so that a centrifugal screening process of the materials is carried out; the wall surface of the variable-aperture roller is provided with sieve pores distributed in a regular matrix, and the sieve pores adopt a combined structure to control and change the aperture. The invention adopts a variable-aperture screening system to realize the multi-aperture continuous screening function and greatly reduce the volume of equipment; the centrifugal roller is used for increasing the material screening efficiency; the design that combines two vibration driving motor, one-way pnematic system and nanometer composite ceramic coating, greatly reduce the screening result error that the microparticle adsorbs the cause, and centrifugal multistage screening system has simple structure, screening efficiency height, a great deal of advantage such as clean environmental protection, greatly satisfies the screening demand of indoor fine grit material.

Description

A centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials

technical field

The invention relates to the technical field of screening equipment, in particular to a centrifugal indoor multistage screening apparatus suitable for fine-grained materials.

Background technique

In the scientific research and production, laboratory and quality inspection room of chemical, pharmaceutical, geological, building materials, national defense and other departments, it is very important to accurately screen, filter and detect the particle size structure of granular and powdery materials.

In the screening, filtration and detection of fine-grained materials, sieve surfaces with different apertures are mainly used for sieving. The material with the pore size of the sieve surface is screened layer by layer, and finally the separation of different particle sizes is achieved and the particle size composition of the material is determined. However, the traditional indoor test screening device has the following problems: (1) The equipment is listed in space through multi-layer screen surfaces, which inevitably increases the size of the screening device, which is contrary to the principle of small and practical indoor test equipment. ② The disassembly, assembly, and weighing of the sieve surface at all levels are cumbersome, and it is extremely easy to cause confusion in the results of particle sieving. ③During the screening process, the large particle materials and the screen structure inevitably have the adsorption function for the micro-particles and powdery materials, resulting in the extension of the required screening time and the deviation of the quality of the material on the screen, which will eventually reduce the amount of material on the screen. Screening, filtration and detection accuracy of work. Therefore, how to sieve high-efficiency, fast and accurate fine-grained materials has become a problem to be solved by those skilled in the art.

In order to solve the above problems, this case was born.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials, which solves the problems raised in the above-mentioned background technology.

(2) Technical solutions

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a centrifugal indoor multi-stage screening apparatus suitable for fine-grained materials, comprising a sealed screen body, and a multi-stage screening system is installed on the sealed screen body, 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. The wall surface of the variable aperture drum is provided with screen holes distributed in a regular matrix. The variable aperture combined structure is used to control the change of aperture. The variable aperture combined structure has a vertical single row as the basic unit and is evenly distributed around the circumference of the sealed screen body. The variable aperture combined structure of each row is connected in series, and the sieve holes of all rows are changed simultaneously The linkage rod is used to realize the uniform adjustment of the pore size of the sieve holes.

Preferably, the variable aperture combined structure is placed inside the wall of the variable aperture drum, and each variable aperture combined structure includes a control panel, a movable cover, and a limit base, wherein each limit base corresponds to a sieve hole, and the The movable cover plate is circumferentially arranged 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 closed on one side of the limit base, and both The axis lines of the panels are coincident; the outer ends of the movable cover are connected with cylindrical transmission rods; the control panel is correspondingly provided with strip grooves for embedding the cylindrical transmission rods, so that the movement of the control panel is indirectly driven during the rotation of the control panel. The cover plate turns.

Preferably, an adjustment rod is connected to the outside of the control panel, the direction of the adjustment rods on each row of variable aperture composite structures is the same, and a plurality of adjustment rods in each row are connected to a linkage rod, wherein each adjustment rod is connected to The connection of the corresponding connecting rod adopts a hinged connection mode, and the linkage rods are all fixedly connected with the upper lifting adjustment ring. By adjusting the height of the lifting adjustment ring, all the adjustment rods are synchronously driven to move upward, thereby driving the control panel to rotate. The synchronous change of the diameter of the outer peripheral surface of the variable-aperture drum is realized.

The aperture of the sieve can be continuously changed in the range of Φ0.85～4.75mm.

The driving lift adjusting ring adopts a conventional electric driving method, which can realize up and down movement. It should be noted that the change size of the aperture of this solution is small, and the upward and downward movement of the linkage rod drives the deflection (rotation) of the adjustment rod to be extremely small.

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 inserted into the upper screen body, and the storage box is connected to the lower screen body. The bottom of the storage box is provided with a filter screen; 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.

Preferably, the multi-stage screening system includes a rotating motor, wherein a drum sealing cover is snap-connected to the centrifugal variable aperture drum; the rotating motor is placed on the upper side of the screen cover, and the output end of the rotating motor is connected to the drum sealing cover, and In this way, the centrifugal variable-aperture drum is driven to rotate around its axis.

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

Preferably, the upper end of the sealed screen body is provided with a one-way wind system, which includes an air intake fan and a one-way air guide groove, and the air intake fans are evenly distributed on the outer side of the sealed screen body at intervals of 120° in the circumferential direction. The air guide groove surrounds the top of the sealing screen at 360° and is spatially consistent with the intake fan. The intake fan provides unidirectional airflow of different intensities inside the equipment through the one-way air guide groove.

Preferably, the one-way air guide groove has a narrow cavity with a retracted middle, the upper and lower ends of the narrow cavity are in contact with the inner wall of the sealing screen body, and the upper end of the narrow cavity is provided with an annular horizontal opening, and the horizontal opening communicates with the interior, Matching with the upper and lower ends of the narrow cavity, the air flows through the narrow wall and is led downward from the horizontal port.

Preferably, the lower side of the sealing screen body is connected with a base, the base includes a support spring and a base, the support spring connects the base with 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.

(3) Beneficial effects

After adopting the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention adopts the variable aperture screening system to realize the multi-particle size continuous screening function and greatly reduces the equipment volume; the centrifugal drum is used to increase the screening of materials Efficiency; combined with the design of dual-vibration drive motor, one-way wind system and nano-composite ceramic coating, it greatly reduces the screening result error caused by the adsorption of micro-particles; the closed structure is adopted, the dust escapes less, and the response is green, clean and environmentally friendly Civilized construction requirements. The centrifugal multi-stage screening system has many advantages such as simple structure, high screening efficiency, cleanliness and environmental protection, and greatly meets the screening needs of indoor fine-grained materials.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the schematic diagram of opening/opening door of the present invention;

Fig. 3 is the sectional view of the sealing screen body of the present invention;

Fig. 4 is the structure schematic diagram of the variable aperture drum of the present invention;

Fig. 5 is the schematic diagram of the variable aperture drum screen surface of the present invention;

Fig. 6 is the dismantling schematic diagram of the variable aperture drum screen surface of the present invention;

7 is a schematic diagram of the variable aperture composite structure of the present invention;

Fig. 8 is the internal schematic diagram of the variable aperture composite structure of the present invention;

Fig. 9 is the dismantling schematic diagram of the variable aperture composite structure of the present invention;

Figure 10 is a schematic cross-sectional view of the one-way wind power system of the present invention;

FIG. 11 is a schematic diagram of the one-way pneumatic system of the present invention.

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

Detailed ways

The present invention will be described in further detail below through the accompanying drawings and embodiments.

As shown in Figure 1-11: a centrifugal indoor multi-stage sieving device suitable for fine-grained materials, mainly including a sealed sieve body 100, a one-way pneumatic system 200, a multi-stage screening system 300, and a base 400 in total 4 parts, as shown in Figure 1, complete the efficient, fast and precise screening of fine-grained materials through the cooperation of each system.

According to the above scheme, the sealed screen body 100 includes a detachable screen cover 101, an open-door upper screen body 102, a funnel-shaped lower screen body 103, and a storage box 104 as shown in Figure 1. The inside of the sealed screen body 100 is coated with a nanocomposite ceramic coating, The coating has the characteristics of anti-adsorption and ultra-low friction, preventing material particles from being adsorbed or remaining on the inner surface of the sealing screen body 100 . The detachable screen cover 101 is convenient for the disassembly and installation of the centrifugal detachable variable-aperture drum 303, and controls the feeding and discharging; Cleaning and maintenance; the storage box 104 and the funnel-shaped lower screen body 103 are snap-connected, and the bottom of the storage box adopts a filter screen with high air permeability and strong adsorption, which has a good function of collecting fine particles of materials.

According to the above scheme, the one-way wind system 200 is shown in Fig. 2, including an intake fan 201 and a one-way air guide groove 202. The intake fans 201 are evenly distributed on the outside of the upper screen body 102 with an interval of 120° to provide different strengths for the inside of the equipment. The one-way driving airflow; the one-way air guide groove 202 surrounds the top of the sealing screen body 100 at 360°, and the spatial consistency with the intake fan 201 is mainly reflected in the horizontal height. The intake fan 201 is controlled by different gears to form different Strong airflow, the narrow cavity at the front end of the unidirectional air guide groove 202 forces the high-pressure airflow to form a unidirectional airflow downward from the top of the device, ensuring that the material particles enter the storage box 104 quickly and efficiently.

The one-way air guide groove 202 has a narrow cavity with an inwardly retracted middle. The upper and lower ends of the narrow cavity are fitted to the inner wall of the sealing screen body 100, and the upper end of the narrow cavity is provided with an annular horizontal opening 203, which communicates with the interior and cooperates with the interior. The upper and lower ends of the narrow cavity fit against the inner wall of the sealing screen, so that after the air flow is temporarily retained in the narrow cavity, it can quickly flow through the horizontal port and be led downward to form a one-way air flow.

According to the above scheme, the multi-stage screening system 300, as shown in FIG. 2, includes a rotating motor 301, a drum sealing cover 302, a centrifugal variable aperture drum 303, a support rod 304, a vibration motor 305, a control knob 306, and a drum sealing cover 302 The centrifugal variable aperture drum 303 is snap-connected, and the rotating motor 301 can provide different rotational speed power for the centrifugal variable aperture drum 303;

The wall surface of the centrifugal variable aperture drum 303 is provided with sieve holes 307 distributed in a regular matrix, and the sieve holes 307 adopt a variable aperture combined structure, which is adjusted in series by transmission, and can be continuously changed in the range of Φ0.85-4.75mm through the control knob 306; The vibration motor 305 is fixed on the outside of the funnel-shaped lower screen body 103 and is distributed symmetrically in space, providing the instrument with vibration loads of different amplitudes and frequencies, so as to reduce the error caused by the residual material particles on the wall to the screening and improve the screening work efficiency.

According to the above solution, the centrifugal variable aperture roller 303 is implemented as shown in FIG. 3 as follows: the variable aperture member includes an adjustment rod 3031, a control panel 3032, a movable cover 3033, and a limit base 3034, and the control panel 3032 has a strip-shaped groove. The structure fits with the upper column-shaped transmission rod of the movable cover 3033, and the control panel 3032 is controlled to rotate through the adjustment rod 3031; The movable cover plate 3033 moves regularly to realize the aperture change. More preferably, by increasing the number of movable cover plates 3033, a sieve hole with a more circular structure can be formed.

Specifically, an adjustment rod 3031 is connected to the outer side of the control panel 3032, and the direction of the adjustment rods on each row of variable aperture composite structures is the same, and a plurality of adjustment rods in each row are connected to a linkage rod 3037. On the upper side is a lift adjusting ring 3038. By adjusting the height of the lift adjusting ring 3038, all the adjusting rods 3031 are moved up and down synchronously, and then the control panel 3032 is driven to rotate, so as to realize the synchronous change of the diameter of the wall of the variable-aperture drum.

According to the above scheme, the base 400 includes a support spring 401 and a base 402. The support spring connects the base 402 with the upper multi-stage screening system 300; The bottom is made of high-friction plastic material to prevent the instrument from shifting during operation.

A method for using a centrifugal multi-stage indoor sieving apparatus suitable for fine-grained minerals, comprising the following steps:

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 drum 303 to a minimum value of 0.85mm;

Step 2, remove the detachable screen cover 101 and pour the fine stones 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;

Step 3: Remove the removable storage box 104 to collect the undersize, reinstall the removable storage box 104 after the collection is completed, rotate the control knob 306 to the next set value and start the rotating motor 301 again;

Step 4. Repeat Step 3 to continuously adjust the aperture size of the centrifugal variable aperture drum 303 to the set maximum value;

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

The above-mentioned embodiments are enlightened, and through the above-mentioned descriptions, relevant personnel can make various changes and modifications without departing from the idea of the present invention. The technical scope of the utility model is not limited to the content in the description, and the scope of its protection must be determined according to the scope of the claims.

Claims (10)

1. A centrifugal indoor multistage screening apparatus suitable for fine-grained materials, comprising a sealed screen body, characterized in that: a multistage screening system is installed on the sealed screen body, and the multistage screening system includes a The centrifugal variable aperture drum in the sealed screen body is driven to rotate by a rotating motor placed on the top of the sealed screen body to carry out the centrifugal screening process of materials; the wall surface of the variable aperture drum is provided with screen holes distributed in a regular matrix. The hole adopts a variable-aperture composite structure to change the diameter of the hole, wherein the variable-aperture composite structure is a vertical single column as the basic unit, and is evenly distributed around the circumference of the sealed screen body. The linkage rod is used to realize the uniform adjustment of the sieve aperture. 2. A centrifugal indoor multistage sieving apparatus suitable for fine-grained materials according to claim 1, characterized in that: the variable aperture combined structure is placed on the inner side of the variable aperture drum wall surface, and each variable aperture combined structure It includes a control panel, a movable cover, and a limit base, wherein each limit base corresponds to a sieve hole; the movable cover is circumferentially arranged around the center of the limit base, and one end is pivotally connected to the corresponding The control panel is rotatably covered on one side of the limit base, and the axis lines of the two are overlapped; the outer ends of the movable cover are connected with cylindrical transmission rods; the The control panel is correspondingly provided with a strip-shaped groove for embedding the column-shaped transmission rod, so that the movable cover plate is indirectly driven to rotate during the rotation of the control panel. 3. A centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials according to claim 2, characterized in that: an adjustment rod is connected to the outside of the control panel, and each row of variable aperture composite structures is provided with an adjusting rod. The direction of the adjusting rods is the same, and a plurality of adjusting rods in each row are connected to a linking rod, wherein the connection between each adjusting rod and the corresponding connecting rod adopts a hinged connection mode, and each of the linking rods arranged in the circumferential direction is connected The upper side is fixedly connected with the lifting adjusting ring. 4 . The centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials according to claim 1 , wherein the pore diameter of the sieve holes is continuously changed in the range of Φ0.85-4.75 mm. 5 . 5. A centrifugal indoor multistage sieving apparatus suitable for fine-grained materials according to claim 1, wherein the sealed sieve body comprises a detachable sieve cover, an open-door upper sieve body, and a funnel. A lower sieve body and a storage box in the shape of a sieve, wherein the sieve cover is inserted on the upper sieve body, the storage box is connected with the lower sieve body in a snap-type connection, and a filter screen is arranged at the bottom of the storage box; The lower sieve body is connected and communicated with the upper and lower parts. 6. A centrifugal indoor multi-stage screening apparatus suitable for fine-grained materials according to claim 5, characterized in that: the multi-stage screening system comprises a rotating motor, wherein the centrifugal variable aperture drum is buckled The rotary motor is placed on the upper side of the screen cover, and its output end is connected with the drum sealing cover, thereby driving the centrifugal variable-aperture drum to rotate around its axis. 7. A centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials according to claim 6, characterized in that: the centrifugal variable aperture drum is fixedly connected to the funnel-shaped lower screen body through a support rod; The outer space of the funnel-shaped lower screen body is symmetrically distributed with vibration motors, which provide vibration loads of different amplitudes and frequencies for the instrument. 8. A centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials according to claim 1, characterized in that: the upper end of the sealed sieve body is provided with a one-way pneumatic system, which comprises an air intake fan, One-way air guide groove, the air inlet fan is evenly distributed on the outer side of the sealing screen body at 120° circumferential direction; the one-way air guide groove is surrounded by 360° on the top of the sealing screen body, and is consistent with the air inlet fan in space, The intake fan provides unidirectional airflow with different intensities inside the device through the unidirectional air guide groove. 9 . A centrifugal indoor multi-stage sieving apparatus suitable for fine-grained materials according to claim 8 , wherein the unidirectional air guide groove has a narrow cavity with an inward shrinkage in the middle, and the upper part of the narrow cavity has a narrow cavity. 10 . , The lower end is fitted with the inner wall of the sealing screen body, and the upper end is provided with an annular horizontal opening, and the horizontal opening communicates with the interior. 10. A centrifugal indoor multistage sieving apparatus suitable for fine-grained materials according to claim 1, characterized in that: the lower side of the sealed sieve body is connected with a base, and the base comprises a support spring, a base , the support spring connects the base with the sealing screen body, and the side of the base has a square hollow structure.

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