CN105344602A - Multi-stage microparticle vacuum screening device - Google Patents

Abstract

The invention provides a multi-stage microparticle vacuum screening device, which includes a horizontally arranged screen cylinder, a crushing unit, a stirring unit and a sorting unit; the crushing unit includes a crushing pipe, a motor A and a crushing roller group, and the crushing The discharge port of the material pipe is connected with the feed port of the sieve drum; the stirring unit includes a motor B, a blower and a stirring rod group, and the stirring rod group is arranged horizontally and is located below the feed port of the screen drum; the sorting unit includes a motor C , centrifugal fan, dust cover, horizontal shaft and more than 2 sets of sorting components fixed on the horizontal shaft. The centrifugal fan is installed at the right end inside the screen drum, and the dust removal cover is covered on the air outlet of the centrifugal fan. The horizontal shaft is along the axial direction of the screen drum. Installed horizontally, the right end is connected to the motor C, and the left end is fixed on the dust cover. The sorting component is composed of a screen and a material brush; the vacuum screening device uses pressure difference as the power for sorting, and can be used for particle Micro-particulate matter that is difficult to sort by gravity, the minimum sorting particle size can reach 2000 mesh.

Description

A multi-stage microparticle vacuum screening device

technical field

The invention relates to a screening device for microparticles, which belongs to the technical field of screening equipment.

Background technique

Artificial cores are the basic medium for physical simulation of reservoirs, and efficient and accurate separation of sand and mud materials with different particle sizes is the prerequisite for the preparation of artificial cores. In the preparation process of artificial cores, in order to make the physical and chemical characteristics of the cores closer to the real cores and satisfy the fine simulation and description of different lithologies, fine-grained materials with a particle size of less than 1000 mesh are often involved. The individual particles of this kind of material are small in size and mass, and the gravity has little effect on it. The main effect is the intermolecular force. The conventional sorting method based on gravity is obviously not suitable for this particle size. Sorting with water as the medium has certain effects, but the sorting efficiency is low, and multi-stage sorting cannot be carried out at the same time, and the solid-liquid separation effect in the later stage is difficult to guarantee.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a multi-stage microparticle vacuum screening device, the vacuum screening device is arranged horizontally, the dynamic vacuum in the device is maintained by a centrifugal fan, and the separation is carried out with the pressure difference in the device as the power , to avoid sorting failure caused by too fine material particles, and at the same time avoid the problem that the material is difficult to dry after being wet.

The technical solution adopted to realize the object of the present invention is a multi-stage microparticle vacuum screening device, including a screen cylinder with a feed inlet and a discharge outlet, a crushing unit, a lifting unit and a sorting unit, the screen cylinder Arranged horizontally, the stirring unit and the sorting unit are respectively installed on the right side and the left side of the inside of the screen cylinder, the discharge port of the screen cylinder is located under the sorting unit, and the crushed material unit is installed on the right end of the screen cylinder and enters with the screen cylinder. The feed port is connected; the crushing unit includes a crushing pipe, a motor A installed on the crushing pipe, and a crushing roller set driven by the motor A installed inside the crushing pipe, and the discharge port of the crushing pipe is connected to the The feeding port of the screen cylinder is connected; the stirring unit includes a motor B, a blower and a stirring rod group driven by the motor B, the stirring rod group is arranged horizontally and is located below the feeding port of the screen drum, and the stirring rod group is The ends of each stirring rod are fixedly connected and distributed radially; the sorting unit includes a motor C, a centrifugal fan, a dust cover, a horizontal shaft driven by the motor C, and more than 2 sets of sorting components fixed on the horizontal shaft. The fan is installed at the right end inside the screen cylinder, the dust removal cover is covered on the air outlet of the centrifugal fan, the horizontal axis is installed horizontally along the axial direction of the screen cylinder, the right end is connected with the motor C, and the left end is fixed on the dust removal cover. The assembly is composed of a screen and a material brush. The mesh size of the screen in each group of selection components decreases from right to left. The screen is installed vertically through the installation hole opened in the center and the bearing in the installation hole. On the horizontal axis, the side of the screen is in contact with the inner surface of the screen drum, the material brush is located on the side of the screen near the feed inlet of the screen drum and is in virtual contact with the screen, one end of the material brush is connected to the horizontal axis, The shaft drives the rotation.

The bottom of the discharge port of the sieve cylinder is provided with the same number of retrieving cabins as the number of sorting components, and the bulkhead of the retrieving cabin is provided with a hatch.

The wall of the sieve cylinder part where the sorting unit is located is composed of a conical tube with the same number as the sorting components and the pipe diameter decreases from right to left and is connected with a flange through a sealing ring. The discharge port, each discharge port is respectively installed in the lower part of each frustum-shaped tube.

The space between the screen installation hole and the horizontal shaft is sealed by a felt ring and an elastic retaining ring.

The air outlet of the fan is connected with a spiral jet air duct, the spiral jet air duct is in a spiral shape, and more than 2 air outlet holes are arranged at intervals on it, the spiral jet air duct is installed horizontally, and each air outlet is upward.

Below the stirring rod group, there is a horizontally placed stirring bottom plate. The edge of the stirring bottom plate is in virtual contact with the cylinder wall in the installation area of the stirring unit of the screen drum. The installation area of the stirring unit is divided into the stirring area and the In the installation area below it, the mixing bottom plate is a concave annular plate in the middle, and an annular filter with a mesh size of not less than 2500 mesh is provided in the middle hole. The motor B, the blower and the spiral jet air pipe are all located in the installation area. The spiral jet duct is located directly below the ring screen.

The stirring rod group is composed of a vertical shaft and 2 stirring rods. The stirring rod is inclined upward along the horizontal direction and is in virtual contact with the stirring bottom plate. The lower end of the stirring rod is connected with the vertical shaft through a key. Spiral center.

The blower is composed of a main air duct and an impeller installed in the main air duct. The helical jet air duct communicates with the main air duct, and the wheel shaft of the impeller is connected with the rotating shaft of the motor B through a belt.

There is a hole cover at the orifice of the feed port of the screen cylinder, and the hole cover is located inside the screen cylinder, and its upper end is hinged with the cylinder wall at the upper part of the orifice through a pin shaft.

The crushing roller group is composed of two crushing rollers installed in parallel, the two crushing rollers are driven through the tooth meshing on the surface, and the motor A drives the two crushing rollers to rotate through the gear set.

It can be seen from the above technical solution that the multi-stage microparticle vacuum screening device provided by the present invention adopts the principle of vacuum for screening, and the main body is arranged in a horizontal direction to avoid gravity factors from affecting the sorting quality of the device. The main body of the device is composed of three units, respectively It is: 1. Crushing unit, including crushing pipe, motor A and crushing roller group. The crushing roller group is installed inside the crushing pipe and driven by motor A to crush large-sized materials put into the crushing pipe. The discharge port of the broken material pipe is connected with the feed port of the screen drum, and the crushed material enters the screen drum through the feed port of the screen drum; , the stirring rod group is arranged horizontally and the whole is in a radial shape. The stirring rod group rotates under the drive of the motor B to stir the crushed material falling into the screen cylinder, and the blower blows to the stirred material at the same time, and the crushed material Under the action of wind and agitation, fine particles with a particle size of less than 1000 mesh form air suspension in the screen cylinder; 3. Sorting unit, including motor C, centrifugal fan, dust cover, horizontal shaft and more than 2 groups for screening The sorting component for air suspension, the centrifugal fan is installed at the right end inside the screen drum, used to vacuum the screen drum and maintain the dynamic vacuum in the screen drum, and form a pressure difference in the screen drum, in order to ensure the quality of the separation and the separation Efficiency, the pressure difference is preferably 800 ~ 2000pa, the air suspension is affected by the pressure difference and moves to the side of the centrifugal fan, and the separation is completed through the multi-stage sorting component. The remaining dust after screening by the multi-stage sorting component avoids polluting the external environment. The horizontal axis is driven by the motor C and runs through the inside of the screen cylinder in the horizontal direction. The sorting component is composed of a screen and a material brush, wherein the material brush and the horizontal axis Connected and rotated by the horizontal shaft, it is used to form a micro-movement airflow near the same group of screens, which is convenient for sorting. The screen is installed on the horizontal shaft along the vertical direction through the bearing, and is used to screen micro particles of different particle sizes. particles.

In the screen cylinder provided by the present invention, the part used for material sorting is designed as a conical shape with the cylinder diameter decreasing from right to left, that is, the closer to the centrifugal fan, the smaller the cylinder diameter. This structure can accelerate the air suspension in the separation component. The flow velocity between them can improve the separation rate; the wall of the truncated part of the screen cylinder is composed of the same number of truncated tubes as the number of sorting components connected to the flange through the sealing ring. When replacing the screen, only part of the truncated tubes needs to be removed. Yes, it is easy to replace the screen; in order to ensure the quality of the screening, the gap between the screen and the horizontal axis is sealed by a felt ring and an elastic retaining ring, and the screen is in close contact with the wall of the screen cylinder, which effectively prevents the larger particles from Particles enter the sorting area of smaller particles from the gap.

Below the stirring rod group, there is a horizontally placed stirring bottom plate. The edge of the stirring bottom plate is in virtual contact with the cylinder wall in the installation area of the stirring unit of the screen drum. The installation area of the stirring unit is divided into the stirring area and the In the installation area below it, the motor B, the blower and the spiral jet duct are all located in the installation area to prevent the fine particles stirred up from entering the motor B and the blower to damage the equipment. The air outlet of the fan is connected to the horizontally installed spiral jet duct , the spiral jet air pipe is in a spiral shape, and a plurality of air outlets with upward openings are set at intervals on it, and the flowing air flows out from each air outlet, forming turbulent flow in the stirring area to ensure the fine particles in the crushed material It is fully raised under the action of the fan; the rotation center of the stirring rod group, that is, the vertical axis, is located in the spiral center of the spiral jet duct, so that the stirring effect of the stirring rod group on the material and air suspension is optimal; the stirring bottom plate At the same time, it is used to accept materials that have not been fully stirred. The stirring bottom plate is a concave annular plate in the middle, and an annular filter with a mesh size of not less than 2500 mesh is installed in the middle hole, and the filter mesh can be initially removed. Micro-particles can reduce the dust removal capacity of the dust removal cover and avoid the blockage of the dust removal cover. The spiral jet air pipe is located directly under the filter screen to facilitate air supply; the wheel shaft of the blower impeller is connected to the rotating shaft of the motor B through a belt, that is, the motor B is the operation of the fan. Provide power and reduce the power consumption of the whole device.

There is a hole cover at the orifice of the feed port of the screen cylinder. The hole cover is located inside the screen cylinder, and its upper end is hinged with the cylinder wall above the hole through a pin shaft. When the feeding is completed, the hole cover automatically covers the hole to prevent the device from During the operation, the material is blown out of the screen drum from the feed port.

Compared with the prior art, the multi-stage microparticle vacuum screening device provided by the present invention has the advantages of:

1. The vacuum screening device provided by the present invention adopts the principle of vacuum for screening, uses pressure difference as the sorting power, breaks the form of conventional sorting instruments relying on gravity sorting, and fundamentally avoids the separation caused by gravity sorting due to too fine material particles. The failure of the separation and the difficulty of drying the water-wet materials of the hydraulic separation have filled the gaps in the prior art;

2. The vacuum screening device provided by the present invention can be used for microparticulate matter whose particle size is less than 1000 mesh and which is difficult to sort by gravity, and the minimum sorting particle size can reach 2000 mesh;

3. The vacuum screening device provided by the present invention has a simple structure. The device integrates crushed material, multi-stage sorting and collection, has high working efficiency, and ensures a clean environment.

4. In the vacuum screening device provided by the present invention, the sorting sieves at all levels can be disassembled and replaced separately, realizing multiple combinations of multi-stage sieves, and meeting the requirements of the test for combinations of different particle sizes.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-stage microparticle vacuum screening device provided by the present invention.

Figure 2 is a schematic diagram of the structure of the scrap unit.

Figure 3 is the second structural diagram of the crushing unit.

Figure 4 is a partial structural diagram of the stirring unit.

Fig. 5 is a structural schematic diagram of the spiral jet air duct.

Figure 6 is an installation structure diagram of the sorting assembly.

Among them, 1-centrifugal fan, 2-outlet of centrifugal fan, 3-dust cover, 4-horizontal shaft, 5-screen, 6-flange, 7-material brush, 8-round tube, 9-motor C, 10-screen cylinder, 11-crushed material pipe, 12-hole cover, 13-ventilation window, 14-spiral jet duct, 15-coupling, 16-motor B, 17-belt, 18-impeller, 19-total Air duct, 20-engine door, 21-stirrer rod group, 22-door, 23-outlet, 24-feeding cabin, 25-motor A, 26-bearing, 27-felt ring, 28-key, 29-retaining ring, 30-stirring rod, 31-vertical shaft, 32-stirring bottom plate, 33-baffle plate, 34-ring filter, 35-gear set, 36-crushing roller, 37-air outlet .

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

The multi-stage microparticle vacuum screening device provided by the present invention has a structure as shown in Figure 1, including a screen cylinder 10 with a feed port and a discharge port 23, a crushing unit, a stirring unit and a sorting unit. The cylinder is arranged horizontally. The stirring unit and the sorting unit are respectively installed on the right and left sides of the inside of the screen cylinder. Located below the sorting unit, there is a reclaiming cabin 24 with the same number as the outlets below it, a hatch 22 is provided on the bulkhead of the reclaiming cabin, and a hole cover 12 is provided at the orifice of the inlet of the sieve drum , the hole cover is located inside the screen cylinder, and its upper end is hinged with the cylinder wall at the upper part of the hole through a pin shaft;

Referring to Fig. 2 and Fig. 3, the crushing unit includes a crushing pipe 11, a motor A25 installed on the crushing pipe and a group of crushing rollers installed inside the crushing pipe driven by the motor A to rotate. The discharge port is connected with the feed port of the sieve cylinder. The crushing roller group is composed of two crushing rollers 36 installed in parallel. The two crushing rollers are driven by the meshing teeth on the surface. Crushing roller rotation;

Referring to Fig. 4, the stirring unit includes a motor B16, a blower, a spiral jet duct 14, a stirring rod group 21 and a stirring bottom plate 32 positioned below the stirring rod group, the stirring bottom plate 32, the edge of the stirring bottom plate and the screen cylinder The cylinder wall in the installation area of the stirring unit is in virtual contact. The installation area of the stirring unit is divided into the stirring area and the installation area below it by the stirring bottom plate. The motor B, the blower and the spiral jet air pipe are all located in the installation area. The mixing bottom plate is a concave annular plate in the middle, and an annular filter screen 34 with a mesh size of not less than 2500 meshes is arranged in the middle hole, and the spiral jet air pipe 14 is connected to the air outlet of the fan, as shown in Fig. 5. The spray air pipe 14 is spiral, and there are more than two air outlet holes 37 separated thereon. The spiral spray air pipe is installed horizontally directly below the annular filter screen with each air outlet facing upwards. The stirring rod group is arranged horizontally and located Below the feeding port of the barrel, the stirring rod group is composed of a vertical shaft 31 and two stirring rods 30, the vertical shaft 31 is driven by the motor B and is located at the spiral center of the spiral jet duct, each stirring rod 30 is horizontally The direction is inclined upward and radially distributed, the upper end is in virtual contact with the stirring bottom plate, and the lower end is connected with the vertical shaft 31 through the key 28. The blower is composed of the main air duct 19 and the impeller 18 installed in the main air duct. The pipe 14 communicates with the main air pipe 19, and the wheel shaft of the impeller 18 is connected with the rotating shaft of the motor B through the belt 17. The lower part of the installation area of the lifting unit, that is, the wall of the part where the installation area is located, is provided with ventilation windows 13 for ventilation and for replacement. The cabin door 20 of each component of the lifting unit;

The sorting unit includes a motor C9, a centrifugal fan 1, a dust cover 3, a horizontal shaft 4 driven by the motor C, and more than 2 groups of sorting components fixed on the horizontal shaft. The centrifugal fan is installed at the right end of the screen drum, and the dust cover Covered on the air outlet 2 of the centrifugal fan, the horizontal axis is installed horizontally along the axial direction of the screen cylinder, its right end is connected with the motor C, and the left end is fixed on the dust removal cover. The frustum-shaped tube 8 with the same number of components and decreasing pipe diameter from right to left is formed by connecting the flange 6 with the sealing ring. The lower part of the circular frustum-shaped tube, the sorting assembly is composed of a screen 5 and a material brush 7, and the mesh size of the screen in each group of sorting assemblies decreases from right to left in order, see Figure 6, the screen passes through its center The mounting hole opened and the bearing 26 located in the mounting hole are installed on the horizontal shaft 4 along the vertical direction. The screen mounting hole and the horizontal shaft are sealed by a felt ring 27 and a retaining ring 29. The side of the screen is in contact with the screen. The inner surface of the cylinder is in contact, and the material brush is located on the side of the screen near the feed inlet of the screen cylinder and is in virtual contact with the screen. One end of the material brush is connected to the horizontal shaft and driven to rotate by the horizontal shaft.

Claims (10)

1. a multistage microparticle vacuum screening plant, it is characterized in that: comprise screen drum, the particle unit of band charging aperture and discharging opening, raise and stir unit and separation unit, described screen drum is horizontally disposed, raise and stir right side and the left side that unit and separation unit are installed on screen drum inside respectively, the discharging opening of screen drum is positioned at below separation unit, and particle cellular installation is on screen drum right side and be communicated with screen drum charging aperture, described particle unit comprises particle pipe, be installed on the motor A on particle pipe and be installed on particle pipe inside drive the particle roller group of rotating by motor A, the discharging opening of particle pipe is communicated with screen drum charging aperture, describedly raise the stirring bar group of stirring unit and comprising motor B, air blast and being driven by motor B, described stirring bar group is horizontally disposed and be positioned at the below of screen drum charging aperture, and in stirring bar group, each stirring bar end is connected and radially distributes, described separation unit comprises motor C, centrifugal blower, dust excluding hood, the transverse axis driven by motor C and more than 2 groups are fixed on sorting component on transverse axis, centrifugal blower is installed on the right-hand member of screen drum inside, dust excluding hood covers on the air outlet of centrifugal blower, described transverse axis is installed along the axial level of screen drum, its right-hand member is connected with motor C, left end is fixed on dust excluding hood, described sorting component is made up of screen cloth and material brush, the mesh size of screen cloth order reduction from right to left in each group of sorting component, the installing hole that screen cloth is offered by its center is vertically installed on transverse axis with the bearing being arranged in installing hole, the side of screen cloth contacts with screen drum inner surface, material brush be positioned at screen cloth on the side of screen drum charging aperture and with screen cloth virtual connection touch, wherein one end of material brush is connected with transverse axis, driven by transverse axis and rotate.

2. multistage microparticle vacuum screening plant according to claim 1, is characterized in that: the below of screen drum discharging opening is provided with the feeding cabin identical with sorting component quantity, and the bulkhead in feeding cabin is provided with hatch door.

3. multistage microparticle vacuum screening plant according to claim 1, it is characterized in that: the barrel of the screen drum part at separation unit place is consisted of sealing ring and Flange joint identical with sorting component quantity and that caliber successively decreases from right to left round table-like pipe, screen drum is provided with the discharging opening identical with sorting component quantity, and each discharging opening is installed on the bottom of each round table-like pipe respectively.

4. multistage microparticle vacuum screening plant according to claim 1, be is characterized in that: sealed by felt collar and circlip between screen cloth installing hole and transverse axis.

5. multistage microparticle vacuum screening plant according to claim 1, it is characterized in that: the air outlet of blower fan is communicated with spiral spray airduct, described spiral spray airduct in the shape of a spiral, spaced apartly on it is provided with more than 2 exhaust vents, spiral spray airduct level is installed, and each air outlet all upward.

6. multistage microparticle vacuum screening plant according to claim 5, it is characterized in that: what the below of stirring bar group was provided with horizontal positioned stirs material base plate, the barrel virtual connection of stirring the material edge of base plate and the Yang Jiao cellular installation district of screen drum is touched, Yang Jiao cellular installation district is divided into Yang Jiao district by stirring material base plate and is positioned at the installing zone below it, stirring material base plate is the recessed annular slab in middle part, be provided with mesh size in its interstitial hole and be not less than 2500 object annular filter screens, motor B, air blast and spiral spray airduct are all arranged in installing zone, spiral spray airduct is positioned at immediately below annular filter screen.

7. multistage microparticle vacuum screening plant according to claim 6, it is characterized in that: described stirring bar group is made up of vertical pivot and 2 stirring bars, stirring bar tilt upward in the horizontal direction and with stir expect base plate virtual connection touch, its lower end is connected with vertical pivot by key, and vertical pivot is positioned at the spiral center of spiral spray airduct.

8. multistage microparticle vacuum screening plant according to claim 5, it is characterized in that: described air blast is made up of blast main and the impeller be installed in blast main, spiral spray airduct is communicated with blast main, and the wheel shaft of impeller is connected by the rotating shaft of belt with motor B.

9. multistage microparticle vacuum screening plant according to claim 1, it is characterized in that: the aperture place being positioned at screen drum charging aperture is provided with port lid, and port lid is positioned at screen drum inside, its upper end is hinged by the barrel on bearing pin and top, aperture.

10. multistage microparticle vacuum screening plant according to claim 1, it is characterized in that: described particle roller group is made up of the particle roller of two parallel installations, two particle rollers are by surperficial tooth engaged transmission, and motor A drives two particle rollers to rotate by gear train.