Raw material screening device for heavy calcium carbonate production

Abstract

The utility model discloses a raw material screening device for heavy calcium carbonate production, which comprises a machine frame, a screening assembly is installed on the machine frame, a feeding assembly is fixed on the machine frame above the screening assembly, the screening assembly comprises a screen with an inclined slope and spikes fixed on the surface of the screen, and the spikes are fixed on the surface of the screen. Compared with the prior art, the utility model has the following beneficial effects: 1) the spines are arranged on the surface of the screen mesh, so that calcium carbonate raw materials are in contact with the spines firstly when falling onto the surface of the screen mesh, and caked calcium carbonate is punctured by the spines, so that the calcium carbonate can be automatically dispersed; the problem that in the prior art, calcium carbonate is prone to falling to a certain point of a screen in a concentrated mode during screening is solved. And (2) in addition, through the arrangement of a passing limiting mechanism and a vibration exciter, the thickness of calcium carbonate rolling on the surface of the screen is conveniently controlled, and the problem that due to the large thickness, part of materials are insufficiently screened is solved.

Description

Technical Field

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

[0002] Raw material screening is a routine step in the production of heavy calcium carbonate. During screening, the material falls onto the screen. When the screen vibrates, the material rolls downward along the inclined surface of the screen. Small particles that meet the particle size can pass through the mesh and fall to the bottom of the screen, while large particles that do not meet the particle size will roll to the bottom along the inclined surface of the screen.

[0003] However, there is a common problem with existing calcium carbonate screening devices. That is, during screening, the material usually falls on a certain point of the screen. Especially when the material thickness is relatively large, it will take a long time for the material above to come into contact with the surface of the screen. As a result, some of the material may roll directly to the bottom of the screen before it has time to contact the screen, causing waste.

[0004] For example, the Chinese utility model patent with application number 202122247283.8 is a screening device for calcium carbonate production, whose discharge hopper is arranged above the screening plate. The above-mentioned problems are likely to occur when the material is dropped. Therefore, this application proposes a raw material screening device for heavy calcium carbonate production to solve the above-mentioned problems. This application was created in such a context. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a raw material screening device for heavy calcium carbonate production to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model provides a raw material screening device for the production of heavy calcium carbonate, comprising a frame, on which a screening assembly is installed, and a feeding assembly is fixed on the frame above the screening assembly, the screening assembly comprising a screen with an inclined slope and spikes fixed on the surface of the screen, the spikes being located directly below the feeding assembly and close to the highest point of the screen, the surface of the screen being provided with a passage limiting mechanism, the passage limiting mechanism comprising a baffle, the height of the baffle being lower than the height of the spikes, the baffle being able to adjust its height in the vertical direction, and a gap for material to pass through being provided between the lower end of the baffle and the surface of the screen.

[0007] Preferably, the feeding assembly includes a hopper fixed above the frame and a star-shaped feeding valve installed below the hopper.

[0008] Preferably, the screen is installed with a vibration exciter, and the screen is connected to the frame through a plurality of rubber blocks.

[0009] Preferably, a slide rail is fixed on the surface of the screen, the baffle is slidably connected to the slide rail, and bolts are connected between the baffle and the slide rail.

[0010] Preferably, the screen is a conical structure buckled on the frame, the baffle is a circular ring structure, and the baffle and the screen are arranged concentrically.

[0011] Preferably, the screen is an inclined plate-shaped structure, the baffle is a flat plate structure, and the spikes are triangular block structures.

[0012] Preferably, the frame is provided with a collecting trough below the screen.

[0013] Compared with the prior art, the present invention has the following advantages: 1) by arranging spikes on the surface of the screen, the calcium carbonate raw material will first come into contact with the spikes when it falls onto the screen surface, and the spikes pierce the agglomerated calcium carbonate, so that the calcium carbonate can automatically disperse, thereby solving the problem in the prior art that calcium carbonate is easily concentrated and falls on a certain point of the screen during screening; 2) in addition, by setting the limiting mechanism and the exciter, it is convenient to control the thickness of the calcium carbonate when it rolls on the screen surface, thereby preventing the problem of insufficient screening of some materials due to the large thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of a three-dimensional structure of the first embodiment of the present utility model.

[0016] Figure 2 This is another schematic diagram of the three-dimensional structure of the first embodiment of the present invention.

[0017] Figure 3 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This is a structural diagram of the second embodiment of the present utility model.

[0019] In the figure: 10, frame; 11, collecting trough; 20, screening assembly; 21, screen; 22, spikes; 23, vibrator; 24, rubber block; 25, slide rail; 30, feeding assembly; 31, hopper; 32, star-shaped discharge valve; 40, passage restriction mechanism; 41, baffle; 42, bolt. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-4 The specific implementation methods of the present utility model are further described in detail.

[0021] Example 1

[0022] A raw material screening device for heavy calcium carbonate production includes a frame 10, on which a screening assembly 20 is installed, and a feeding assembly 30 is fixed above the frame 10. The screening assembly 20 includes a screen 21 with an inclined slope and spikes 22 fixed to the surface of the screen 21. The spikes 22 are located directly below the feeding assembly and close to the highest point of the screen 21. The purpose is that when calcium carbonate falls onto the surface of the screen 21, it will first come into contact with the spikes 22. Under the action of the spikes 22, the agglomerated calcium carbonate material is quickly dispersed and then rolls downward along the slope of the screen 21 and disperses. In this way, the problem of insufficient screening caused by the calcium carbonate material being concentrated on the surface of the screen 21 in the prior art is solved.

[0023] Furthermore, a passage-restricting mechanism 40 is provided on the surface of the screen 21, and the passage-restricting mechanism 40 includes a baffle 41. The height of the baffle 41 is lower than the height of the spike 22. That is, after calcium carbonate falls on the spike 22, it will definitely pass through the baffle 41. The baffle 41 can adjust its height in the vertical direction, and a gap is provided between the lower end of the baffle 41 and the surface of the screen 21 for material to pass through. When in use, the height of the gap can be adjusted to control the thickness of the calcium carbonate when it moves on the surface of the screen 21. For example, the larger the gap, the greater the thickness of the calcium carbonate that can pass through the gap. The smaller the gap, the smaller the thickness of the calcium carbonate that can pass through the gap. In actual use, the size of the gap can be adjusted according to the screening situation. For example, if the calcium carbonate screening situation is good, the gap between the baffle 41 and the screen 21 can be appropriately increased. If the calcium carbonate screening situation is poor, it means that some calcium carbonate has not been fully contacted with the screen 21, which may be caused by the thickness being too large. At this time, the gap between the baffle 41 and the screen 21 can be appropriately reduced.

[0024] The feeding assembly 30 includes a hopper 31 fixed above the frame 10 and a star-shaped discharge valve 32 installed below the hopper 31. The setting of the star-shaped discharge valve 32 enables the discharge speed to be well controlled.

[0025] The screen 21 is installed with a vibrator 23, and the screen 21 is connected to the frame 10 via a plurality of rubber blocks 24. The setting of the vibrator 23 can make the screen 21 vibrate, thereby improving the screening effect.

[0026] Specifically, a slide rail 25 is fixed to the surface of the screen 21, the baffle 41 is slidably connected to the slide rail 25, and a bolt 42 is connected between the baffle 41 and the slide rail 25. When adjusting the baffle 41, the baffle 41 can be slid in the slide rail 25 and locked by the bolt 42, which is easy to operate.

[0027] In this embodiment, the screen 21 is a conical structure buckled on the frame 10, and the baffle 41 is a circular ring structure arranged concentrically with the screen 21. The spikes 22 can be set at the center of the conical structure or distributed around the center, and the lower ends of the spikes 22 and the screen 21 can be welded or threaded. The calcium carbonate falling from the feeding assembly 30 will just fall on the spikes 22, and the agglomerated calcium carbonate can be pierced by the spikes 22, so that the calcium carbonate material can be quickly dispersed and then spread around along the conical surface, thereby getting good contact with the screen 21.

[0028] The frame 10 is provided with a collecting trough 11 below the screen 21 for receiving qualified calcium carbonate raw materials.

[0029] In order to receive unqualified calcium carbonate raw materials filtered out from the screen 21, an annular groove (not shown in the figure) concentric with the screen 21 can be provided on the surface of the frame 10. In this way, the calcium carbonate raw materials rolling down from the screen 21 will fall directly into the annular groove.

[0030] Example 2

[0031] Please refer to Figure 4 The structure of the second embodiment is roughly the same as that of the first embodiment, except that the screen 21 is an inclined plate structure and the baffle 41 is a flat plate structure. When in use, the calcium carbonate material first contacts the spikes 22 when it falls on the surface of the baffle 41. When it contacts the spikes 22, the agglomerated calcium carbonate material will automatically disperse and then roll downward along the slope of the screen 21. Qualified calcium carbonate raw materials that meet the size will fall into the collection tank 11 below for collection.

[0032] In this embodiment, in order to better disperse the calcium carbonate raw material after contact with the spikes 22 , the spikes 22 are preferably triangular block structures, and the opposite slopes of the triangular blocks face the two sides of the screen 21 .

[0033] In order to prevent the calcium carbonate raw material from leaking out of the screen 21 from both sides of the triangular block, limiting plates (not shown in the figure) can be fixedly provided on both sides of the screen 21.

[0034] A raw material screening device for heavy calcium carbonate production, the working principle is as follows:

[0035] During use, the calcium carbonate raw material is added into the hopper 31, and the star-shaped discharge valve 32 is started to discharge the material at a uniform speed. The falling calcium carbonate raw material comes into contact with the spikes 22. Under the action of the spikes 22, the agglomerated calcium carbonate raw material is punctured and quickly dispersed along the slope of the screen 21, thereby solving the problem that the calcium carbonate raw material is easily concentrated and falls on a certain point of the screen 21 during screening. When the calcium carbonate raw material rolls downward along the slope of the screen 21, it will pass through the limiting mechanism 40. The setting of the limiting mechanism 40 can prevent the calcium carbonate raw material from being too thick when passing through at one time, thereby ensuring sufficient contact between the calcium carbonate raw material and the screen 21.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A raw material screening device for heavy calcium carbonate production, characterized in that: The invention comprises a frame (10), wherein a screening assembly (20) is installed on the frame (10), and a feeding assembly (30) is fixed on the frame (10) above the screening assembly (20), wherein the screening assembly (20) comprises a screen (21) with an inclined slope and spikes (22) fixed on the surface of the screen (21), wherein the spikes (22) are located directly below the feeding assembly and close to the highest point of the screen (21), and a passage limiting mechanism (40) is provided on the surface of the screen (21), wherein the passage limiting mechanism (40) comprises a baffle (41), wherein the height of the baffle (41) is lower than the height of the spikes (22), and the baffle (41) can be adjusted in height in the vertical direction, and a gap for material to pass through is provided between the lower end of the baffle (41) and the surface of the screen (21).

2. A raw material screening device for heavy calcium carbonate production according to claim 1, characterized in that, The feeding assembly (30) comprises a hopper (31) fixed above the frame (10) and a star-shaped discharge valve (32) installed below the hopper (31).

3. A raw material screening device for heavy calcium carbonate production according to claim 1, characterized in that, The screen (21) is equipped with a vibration exciter (23), and the screen (21) is connected to the frame (10) via a plurality of rubber blocks (24).

4. A raw material screening device for heavy calcium carbonate production according to claim 3, characterized in that, A slide rail (25) is fixed on the surface of the screen (21), the baffle (41) is slidably connected to the slide rail (25), and a bolt (42) is connected between the baffle (41) and the slide rail (25).

5. A raw material screening device for heavy calcium carbonate production according to claim 4, characterized in that, The screen (21) is a conical structure buckled on the frame (10), the baffle (41) is a circular ring structure, and the baffle (41) and the screen (21) are arranged concentrically.

6. A raw material screening device for heavy calcium carbonate production according to claim 4, characterized in that: The screen (21) is an inclined plate-shaped structure, the baffle (41) is a flat plate structure, and the spikes (22) are triangular block structures.

7. A raw material screening device for heavy calcium carbonate production according to any one of claims 5 or 6, characterized in that: The frame (10) is provided with a collecting trough (11) below the screen (21).

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