Screening device for calcium carbonate production

Abstract

The utility model relates to the technical field of calcium carbonate production, and discloses a screening device for calcium carbonate production, which comprises a screening platform, a feeding cylinder, a discharging cylinder, an outer screening cylinder and an inner screening cylinder, the discharging cylinder is provided with an outer discharging cavity and an inner discharging cavity, both the outer screening cylinder and the inner screening cylinder are provided with screening holes, and the aperture of the screening holes of the outer screening cylinder is smaller than that of the screening holes of the inner screening cylinder. The feeding end of the inner screen drum is rotationally and hermetically connected with the feeding drum, the discharging end of the outer screen drum and the discharging end of the inner screen drum are rotationally and hermetically connected with the discharging drum, and a material receiving groove corresponding to the outer screen drum is formed in the screening platform. By arranging the inner screen drum and the outer screen drum which are coaxial, multi-stage screening of materials is achieved, the equipment length is shortened, therefore, the occupied space is reduced, the requirement for use places is lowered, in addition, online cleaning of screen holes can be achieved, screen hole blocking is avoided, and normal screening is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium carbonate production, in particular to a screening device for calcium carbonate production. Background Art

[0002] Calcium carbonate is one of the important inorganic powder fillers and is widely used in plastics, rubber, papermaking, medicine, food and other industries. The main production process includes calcination, precipitation, cooling, carbonization, concentration, drying, etc. In the production of calcium carbide, screening equipment is required for screening.

[0003] The drum screen is a commonly used screening device that can screen materials of different particle sizes. The drum screen is generally tilted and divided into multiple screen sections. The sieve holes on the same screen section have the same aperture, while the sieve holes of different screen sections have different apertures and are arranged in order from small to large. In the prior art, the length of the screening drum is generally long, which will take up a lot of space, and has high space requirements for the place of use. In addition, the material stuck in the sieve holes cannot be cleaned online. Long-term use can easily cause the sieve holes to be blocked, affecting the screening effect. Therefore, based on the above technical problems, improvements are needed. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model provides a screening device for calcium carbonate production.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a screening device for calcium carbonate production, comprising a screening platform, a feed cylinder, a discharge cylinder, an outer screen cylinder and an inner screen cylinder which are coaxially and obliquely arranged, wherein the feed cylinder and the discharge cylinder are both fixed on the screening platform, a feed hopper is provided on the feed cylinder, an outer feeding cavity and an inner discharging cavity are respectively provided on the discharge cylinder corresponding to the outer screen cylinder and the inner screen cylinder, the outer screen cylinder and the inner screen cylinder are both provided with screen holes, wherein the screen hole diameter of the outer screen cylinder is smaller than the screen hole diameter of the inner screen cylinder, the outer screen cylinder and the inner screen cylinder are connected with a rotating drive assembly, the feed end of the inner screen cylinder is rotatably sealed and connected to the feed cylinder, the discharge end of the outer screen cylinder and the discharge end of the inner screen cylinder are both rotatably sealed and connected to the discharge cylinder, a support assembly is correspondingly provided on the outer screen cylinder, and a material receiving trough is opened on the screening platform corresponding to the outer screen cylinder.

[0006] When in use, the inner screen drum and the outer screen drum rotate driven by the rotating drive assembly, the feed drum and the discharge drum are fixed, and the material to be screened is added into the inner screen drum through the feed hopper. The material moves down along the inner screen drum under the action of gravity and is screened under the action of centrifugation. The small particle material passes through the sieve holes of the inner screen drum and the sieve holes of the outer screen drum in turn and falls into the collecting trough below, the medium particle material passes through the sieve holes of the inner screen drum and is intercepted by the outer screen drum, and finally falls into the outer material cavity of the discharge drum, and the large particle material is intercepted by the inner screen drum and falls into the inner discharge cavity of the discharge drum, thereby realizing the screening of materials with different particle sizes.

[0007] Preferably, the rotating drive assembly includes a driving shaft rotatably connected to the screening platform, the driving shaft is connected to a driving motor, the driving shaft is connected to driving pulleys corresponding to the outer sieve drum and the inner sieve drum respectively, the outer sieve drum and the inner sieve drum are connected to driven pulleys corresponding to the driving pulleys respectively, and a transmission belt is arranged around the driving pulley and the corresponding driven pulley.

[0008] The driving motor drives the driving shaft to rotate, and drives the outer screen drum and the inner screen drum to rotate through the transmission belt.

[0009] Preferably, both the outer discharge cavity and the inner discharge cavity are provided with discharge pipes.

[0010] The materials in the outer material cavity and the materials in the inner material cavity are discharged through the discharge pipe.

[0011] Preferably, the support assembly includes rollers arranged on both sides of the outer screen drum, the rollers are rotatably connected to the screening platform, and the outer screen drum is connected to support rollers tangential to the rollers.

[0012] The support assembly is arranged at the end of the outer screen cylinder close to the feed cylinder, and is used for supporting the end of the outer screen cylinder to keep the outer screen cylinder balanced.

[0013] Preferably, both sides of the support roller are provided with limit stop edges for axially limiting the support roller.

[0014] The two limit stops and the support rollers form a U-shaped groove for accommodating the support rollers, which can limit the outer screen drum and prevent the outer screen drum from axial movement, thereby achieving stable support for the outer screen drum.

[0015] Preferably, cleaning rollers are provided above the outer screen drum and above the inner screen drum, respectively. Cleaning brushes are provided on the cleaning rollers. The cleaning rollers are rotatably connected to the screening platform and are connected to a cleaning motor.

[0016] The cleaning roller can completely clean the rotating outer screen drum and the inner screen drum, so as to separate the materials stuck in the screen holes, avoid the blockage of the screen holes and ensure the normal screening. In addition, since the cleaning roller is arranged above the outer screen drum and the inner screen drum, it will not affect the screening.

[0017] The utility model also includes other components that can make the screening device for calcium carbonate production normally used, which are conventional technical means in this area. In addition, the devices or components not limited in the utility model all adopt conventional technical means in this area.

[0018] The utility model realizes multi-stage screening of materials by arranging coaxial inner and outer sieve cylinders, and shortens the length of the equipment, thereby reducing the occupied space and lowering the requirements for the use place. In addition, the sieve holes can be cleaned online to avoid clogging of the sieve holes and ensure normal screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of this embodiment.

[0020] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0021] Figure 3 yes Figure 1 BB section view of the inner and outer screen cylinders.

[0022] Figure 4 It is an axial cross-sectional view of the feed cylinder, outer screen cylinder, inner screen cylinder, and discharge cylinder in this embodiment.

[0023] Figure 5 is a side view of the support assembly in this embodiment.

[0024] In the figure: 1. screening platform; 2. feed cylinder; 3. discharge cylinder; 4. outer screen cylinder; 5. inner screen cylinder; 6. feed hopper; 7. outer material cavity; 8. inner discharge cavity; 9. receiving trough; 10. driving shaft; 11. transmission belt; 12. roller; 13. support roller; 14. limit stop edge; 15. cleaning roller. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example

[0029] See also Figure 1-5 The screening device for calcium carbonate production comprises a screening platform 1, a feed cylinder 2, a discharge cylinder 3, an outer sieve cylinder 4 and an inner sieve cylinder 5 which are coaxially and obliquely arranged, wherein the feed cylinder 2 and the discharge cylinder 3 are both fixed on the screening platform 1, a feed hopper 6 is arranged on the feed cylinder 2, an outer feeding cavity 7 and an inner discharging cavity 8 are respectively arranged on the discharge cylinder 3 corresponding to the outer sieve cylinder 4 and the inner sieve cylinder 5, the outer sieve cylinder 4 and the inner sieve cylinder 5 are both provided with sieve holes, wherein the sieve hole diameter of the outer sieve cylinder 4 is smaller than the sieve hole diameter of the inner sieve cylinder 5, the outer sieve cylinder 4 and the inner sieve cylinder 5 are connected with a rotating drive assembly, the feed end of the inner sieve cylinder 5 is rotatably sealed and connected to the feed cylinder 2, the discharge end of the outer sieve cylinder 4 and the discharge end of the inner sieve cylinder 5 are both rotatably sealed and connected to the discharge cylinder 3, the outer sieve cylinder 4 is correspondingly provided with a supporting assembly, and a material receiving trough 9 is opened on the screening platform 1 corresponding to the outer sieve cylinder 4.

[0030] In this embodiment, the feed hopper is connected with the inner sieve drum 5 through a feed pipe extending into the inner sieve drum 5; the higher end of the inner sieve drum 5 is the feed end, the lower end of the inner sieve drum 5 and the lower end of the outer sieve drum 4 are the discharge ends, and the feed end of the inner sieve drum 5 extends out of the outer sieve drum; a primary screening space is formed inside the inner sieve drum, and a secondary screening space is formed between the inner sieve drum 5 and the outer sieve drum 4; the discharge drum 3 includes an outer ring plate, an inner ring plate and a side plate, and the outer ring plate and the inner ring plate are respectively arranged corresponding to the outer sieve drum 4 and the inner sieve drum 5, the side plate is connected to one side of the outer ring plate and the inner ring plate and seals them, the outer sieve drum 4 is rotatably sealed and connected to the outer ring plate, the inner sieve drum 5 is rotatably sealed and connected to the inner ring plate, the annular space between the outer ring plate and the inner ring plate is an external material cavity connected to the secondary screening space, and the circular space in the inner ring plate is an internal discharge cavity connected to the discharge end of the inner sieve drum 5.

[0031] The inner sieve drum 5 is supported by the feed drum 2 and the discharge drum 3 on both sides thereof, while the outer sieve drum 4 is supported by the support assembly and the discharge drum 3 .

[0032] When in use, the inner sieve drum 5 and the outer sieve drum 4 rotate driven by the rotating drive assembly, the feed drum 2 and the discharge drum 3 are fixed, and the material to be screened is added into the inner sieve drum 5 through the feed hopper. The material moves down along the inner sieve drum 5 under the action of gravity and is screened under the action of centrifugation. The small particles pass through the sieve holes of the inner sieve drum 5 and the sieve holes of the outer sieve drum 4 in turn and fall into the collecting trough below, the medium particles pass through the sieve holes of the inner sieve drum 5 and are intercepted by the outer sieve drum 4, and finally fall into the outer material cavity of the discharge drum 3, the large particles are intercepted by the inner sieve drum 5 and fall into the inner discharge cavity of the discharge drum 3, thereby realizing the screening of materials with different particle sizes.

[0033] By providing the feed cylinder 2 and the discharge cylinder 3 , normal feeding and discharging of the rotating inner sieve cylinder 5 and the outer sieve cylinder 4 can be achieved.

[0034] The rotating drive assembly includes a driving shaft 10 rotatably connected to the screening platform 1, the driving shaft 10 is connected to a driving motor, the driving shaft 10 is connected to driving pulleys corresponding to the outer sieve drum 4 and the inner sieve drum 5, respectively, the outer sieve drum 4 and the inner sieve drum 5 are connected to driven pulleys corresponding to the driving pulleys, respectively, and a transmission belt 11 is arranged around the driving pulley and the corresponding driven pulley.

[0035] The driving motor drives the driving shaft 10 to rotate, and drives the outer sieve drum 4 and the inner sieve drum 5 to rotate through the transmission belt 11. In actual use, driving shafts can also be respectively set corresponding to the inner sieve drum and the outer sieve drum, so as to control the rotation speed and direction of the inner sieve drum 5 and the outer sieve drum 4 respectively.

[0036] The outer material cavity and the inner material cavity are both provided with a material discharge pipe.

[0037] The materials in the outer material cavity and the materials in the inner material cavity are discharged through the discharge pipe.

[0038] The support assembly includes rollers 12 arranged on both sides of the outer screen drum. The rollers 12 are rotatably connected to the screening platform 1 . The outer screen drum 4 is connected to support rollers 13 tangential to the rollers 12 .

[0039] In this embodiment, the support assembly is disposed at the end of the outer sieve drum 4 close to the feed drum, and is used to support the end of the outer sieve drum 4 so as to keep the outer sieve drum 4 balanced.

[0040] The two sides of the support roller 12 are provided with limiting stop edges 14 for axially limiting the supporting roller 13 .

[0041] The two limit stops 14 and the support rollers form a U-shaped groove for accommodating the rollers, which can limit the outer screen drum 4 and prevent the outer screen drum from axial movement, thereby achieving stable support for the outer screen drum 4.

[0042] A cleaning roller 15 is provided above the outer sieve drum 4 and above the inner sieve drum 5, respectively. The cleaning roller is provided with cleaning bristles. The cleaning roller 15 is rotatably connected to the screening platform 1 and is connected to a cleaning motor.

[0043] In this embodiment, the feed cylinder 2 and the discharge cylinder 3 are respectively connected with fixed plates, both ends of the cleaning roller 15 are rotatably connected to the fixed plates through a rotating shaft, and the cleaning motor is fixed to one of the fixed plates.

[0044] The cleaning roller 15 can completely clean the rotating outer sieve drum 4 and the inner sieve drum 5, so as to separate the materials stuck in the sieve holes, avoid clogging of the sieve holes, and ensure the normal screening. In addition, since the cleaning roller 15 is arranged above the outer sieve drum 4 and the inner sieve drum 5, it will not affect the screening.

[0045] During the cleaning process, the cleaning motor drives the cleaning roller 15 to rotate in the opposite direction to the inner screen drum (or outer screen drum) to increase the relative angular velocity of the cleaning roller and enhance the cleaning effect. In actual use, the cleaning motor may not be provided, and the friction between the inner screen drum (or outer screen drum) and the cleaning roller may be used to drive the cleaning roller to rotate to achieve cleaning.

[0046] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A screening device for calcium carbonate production, comprising a screening platform, characterized in that: It also includes a feed cylinder, a discharge cylinder, an outer sieve cylinder and an inner sieve cylinder which are coaxially and obliquely arranged, wherein the feed cylinder and the discharge cylinder are both fixed on the screening platform, the feed cylinder is provided with a feed hopper, the discharge cylinder is provided with an outer feeding cavity and an inner discharging cavity corresponding to the outer sieve cylinder and the inner sieve cylinder respectively, the outer sieve cylinder and the inner sieve cylinder are both provided with sieve holes, wherein the sieve hole diameter of the outer sieve cylinder is smaller than the sieve hole diameter of the inner sieve cylinder, the outer sieve cylinder and the inner sieve cylinder are connected with a rotating drive assembly, the feed end of the inner sieve cylinder is rotatably sealed and connected to the feed cylinder, the discharge end of the outer sieve cylinder and the discharge end of the inner sieve cylinder are both rotatably sealed and connected to the discharge cylinder, the outer sieve cylinder is correspondingly provided with a supporting assembly, and a material receiving trough is provided on the screening platform corresponding to the outer sieve cylinder.

2. The calcium carbonate production screening device according to claim 1, characterized in that: The rotating drive assembly includes a driving shaft rotatably connected to the screening platform, the driving shaft is connected to a driving motor, the driving shaft is connected to driving pulleys corresponding to the outer screen drum and the inner screen drum respectively, the outer screen drum and the inner screen drum are connected to driven pulleys corresponding to the driving pulleys respectively, and a transmission belt is arranged around the driving pulley and the corresponding driven pulley.

3. The calcium carbonate production screening device according to claim 1, characterized in that: The outer material cavity and the inner material cavity are both provided with a material discharge pipe.

4. The calcium carbonate production screening device according to claim 1, characterized in that: The support assembly comprises rollers arranged on two sides of the outer screen drum, the rollers are rotatably connected to the screening platform, and the outer screen drum is connected with support rollers tangent to the rollers.

5. The calcium carbonate production screening device according to claim 4, characterized in that: The two sides of the supporting roller are provided with limit stop edges for axially limiting the supporting roller.

6. The calcium carbonate production screening device according to claim 1, characterized in that: Cleaning rollers are respectively arranged above the outer screen cylinder and above the inner screen cylinder. Cleaning brushes are arranged on the cleaning rollers. The cleaning rollers are rotatably connected to the screening platform and are connected to a cleaning motor.

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