Aggregate exhaust launching disc and pulverizer provided with the same

Abstract

The present application relates to the technical field of pulverizer, especially relates to a material collecting and discharging launching disc and a pulverizer provided with the launching disc, the material collecting and discharging launching disc comprises a bottom disc and a plurality of interval arranged launching flow channels arranged on the upper side edge of the bottom disc, and the plurality of launching flow channels are arranged along the circumference of the bottom disc; the bottom disc is a disc with a concave middle part and a high edge. The pulverizer comprises a pulverizing cavity, a gear ring is arranged on the inner wall of the lower part of the pulverizing cavity, a launching disc is arranged in the pulverizing cavity and arranged horizontally, the launching disc is the above-mentioned material collecting and discharging launching disc, and the launching disc and the gear ring form a pulverizing pair when the launching disc rotates; the material on the launching disc can be launched to the gear ring when the launching disc rotates. The material collecting and discharging launching disc and the pulverizer provided with the launching disc can weaken the weak pulverizing environment, reduce the generation of superfine powder, make the particle size of the material after pulverizing more concentrated, improve the product yield, greatly reduce the energy consumption, and have the advantages of simple structure, suitability for practical application and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulverizer, in particular to a kind of aggregate exhaust launch disc and the pulverizer with the launch disc. BACKGROUND

[0002] Impact crushing is a kind of crushing form widely used in crushing industry. Its crushing mechanism is that high-speed rotating crushing disc drives crushing hammer, forming collision, shearing and friction between material and crushing hammer head, toothed plate, and between materials, so as to achieve the purpose of material crushing.

[0003] The crushing process of impact crusher includes strong crushing and weak crushing. As shown in Figure 7 , Figure 8 and Figure 9 , strong crushing is to drive the material to move in the crushing area by high-speed rotation of the crushing disc, and to achieve the purpose of crushing by collision between the crushing vice (including hammer head 24 and second lining plate 25) and the material, and between the materials. Weak crushing is to drive the materials to rub and collide between the particles by vortex airflow, so as to achieve the process of crushing.

[0004] As shown in Figure 7 , Figure 8 and Figure 9 , in the prior art, the impact crusher usually adopts the way of putting airflow classification in the crushing chamber to separate the qualified material reaching a certain fineness in time during the crushing process. That is, gas is continuously introduced into the crushing chamber during the crushing process, and usually 1 cubic meter of about 1.2 kg of air carries 0.1-0.3 kg of material. Therefore, the gas participating in the crushing accounts for a very large proportion during the material crushing process. As shown in Figure 7 , Figure 8 and Figure 9 , the high-speed rotating hammer head drives the gas to generate radial vortex and tangential vortex under the action of centrifugal force, which are generated by the impact of the windward surface 26 of the hammer head on the gas and the negative pressure formed by the leeward surface 27 of the hammer head. The resistance and vortex generated by these gas accounting for a very large proportion consume a large amount of energy. The material being crushed also participates in the vortex and can achieve a certain crushing effect, but due to the relatively low speed, this crushing is weak crushing. In addition, the material participating in the vortex is usually fine powder or ultrafine powder, which causes over-crushing of the material.

[0005] In actual application, the crushed material requires a concentrated particle size, that is, there is no large particle, and there is also no ultrafine particle. In order to achieve this requirement, the over-fine ultrafine powder needs to be separated out, and the separated ultrafine powder has no application value or greatly reduced application value. As can be seen, in many crushing processes, it is not that the finer the material is the better, but the more concentrated the particle size of the material is the better.

[0006] This puts higher technical requirements on the crusher, one is to use an efficient classification system to separate the particles that meet the particle size requirements in time, and the other is to use a crusher without over crushing. To reduce over crushing of the crusher, strong crushing should be required in the crushing process, and weak crushing should be required less. Therefore, it is necessary to reduce the gas content of the material in the crushing process and the generation of vortex airflow as much as possible. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a material exhaust launching disc and a crusher provided with the launching disc, which can weaken the weak crushing environment, reduce the generation of superfine powder, make the particle size of the crushed material more concentrated, improve the product yield, and greatly reduce the energy consumption.

[0008] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0009] A material exhaust launching disc, comprising a bottom disc and a plurality of spaced launching channels arranged on the upper side edge of the bottom disc, the plurality of launching channels being arranged circumferentially along the bottom disc; the bottom disc is disc-shaped with a concave middle part and a high edge.

[0010] As an improvement, the launching channels are straight channels, and the plurality of launching channels are arranged radially on the bottom disc.

[0011] As an improvement, the launching channels are front-inclined channels with front-inclined tail ends and smooth transitions.

[0012] As an improvement, the launching channels are rear-inclined channels with rear-inclined tail ends and smooth transitions.

[0013] As an improvement, the upper side of the bottom disc is provided with an annular cover ring, a plurality of spaced ribs are arranged between the bottom disc and the cover ring, and the two adjacent ribs and the bottom disc and the cover ring form the launching channels.

[0014] As an improvement, a conical launching surface inclined upward externally is arranged on the bottom disc, and the conical launching surface extends from the concave part in the middle of the bottom disc to the launching channels.

[0015] A crusher, comprising a crushing cavity, a gear ring arranged on the inner wall of the lower part of the crushing cavity, a launching disc arranged horizontally and rotatably in the crushing cavity, the launching disc being the above-mentioned material exhaust launching disc, the launching disc and the gear ring forming a crushing pair when the launching disc rotates; the material on the launching disc can be launched to the gear ring when the launching disc rotates.

[0016] As an improvement, the gear ring comprises an annular mounting plate and a plurality of spaced first lining plates arranged on the mounting plate, the first lining plates are arranged vertically, and a gap is arranged between the first lining plates and the inner wall of the crushing cavity to form an exhaust area.

[0017] As an improvement, the crushing cavity is provided with a horizontal rotating classification impeller assembly, the classification impeller assembly is arranged at the top of the crushing cavity; the top of the crushing cavity is connected with a discharge port, the discharge port is connected with the inside of the crushing cavity through the classification impeller assembly; the sidewall of the crushing cavity is provided with an inlet, the inlet is located above the gear ring; the bottom of the crushing cavity is provided with an air inlet.

[0018] As an improvement, the crushing cavity is provided with a tapered tube with a large upper end and a small lower end, the tapered tube is located outside the classification impeller assembly, a gap is arranged between the upper end of the tapered tube and the top wall of the crushing cavity, and the lower end of the tapered tube is located above the launching disc.

[0019] The above technical scheme is adopted in the present application, and compared with the prior art, the present application has the following advantages:

[0020] In the crushing cavity of the present application, the launching disc forms a crushing pair with the gear ring when rotating, which can discharge the air contained in the material to the maximum extent, reduce the participation of air in the crushing process, avoid useless work on air during crushing, effectively reduce the vortex formed in the crushing area, avoid over-crushing of the material, enhance strong crushing and reduce weak crushing, reduce the generation of superfine powder, make the particle size of the product more concentrated, improve the crushing efficiency of the crusher and the product quality, improve the product yield, greatly reduce the energy consumption, and have the advantages of simple structure, suitability for practical use and the like.

[0021] The present application will be described in detail below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a structural schematic view of a crusher in an embodiment of the present application;

[0023] Figure 2 FIG. 2 is a structural schematic view of a gear ring in FIG. 1; Figure 1

[0024] Figure 3 FIG. 3 is a structural schematic view of A in FIG. 1; Figure 1

[0025] Figure 4 FIG. 4 is a structural schematic view of a material collecting and air exhausting launching disc in FIG. 1; Figure 1

[0026] FIG. 5 is a top view of the material collecting and air exhausting launching disc with radial launching flow channels in the embodiment of the present application; Figure 5

[0027] FIG. 6 is a top view of the material collecting and air exhausting launching disc with backwardly inclined launching flow channels in the embodiment of the present application; Figure 6

[0028] FIG. 7 is a partial top view of an impact crusher in the prior art; and Figure 7 ​​​

[0029] Figure 8 is Figure 7 a schematic view of the B-B section in FIG.

[0030] Figure 9 is Figure 7 a schematic view of vortex formation at the leeward side of the hammer head in FIG.

[0031] wherein: 1 - base plate, 2 - launching channel, 3 - cover ring, 4 - rib plate, 5 - connecting rib, 6 - conical launching surface, 7 - mounting hole, 8 - crushing chamber, 9 - launching plate, 10 - gear ring, 11 - mounting plate, 12 - first lining plate, 13 - exhaust area, 14 - grading impeller assembly, 15 - discharge port, 16 - feed port, 17 - air inlet, 18 - feeding screw, 19 - conical tube, 20 - upper chamber, 21 - impeller shaft, 22 - power shaft, 23 - distribution member, 24 - hammer head, 25 - second lining plate, 26 - windward side, 27 - leeward side. DETAILED DESCRIPTION

[0032] For the sake of illustration and not for limitation, the direction close to the center of the crusher is defined as inner, and the opposite direction is defined as outer.

[0033] EMBODIMENT

[0034] As shown in FIG. Figure 1 , a crusher comprises a crushing chamber 8, a feed port 16 is arranged on the side wall of the crushing chamber 8, and an air inlet 17 is arranged on the bottom of the crushing chamber 8. A grading impeller assembly 14 is arranged horizontally and rotatably in the crushing chamber 8, and the grading impeller assembly 14 is arranged at the top of the crushing chamber 8. A discharge port 15 is connected to the top of the crushing chamber 8 and communicates with the inside of the crushing chamber 8 through the grading impeller assembly 14. The grading impeller assembly 14 is a conventional component on the crusher and belongs to the prior art, which will not be described here. Specifically, the top of the crushing chamber 8 is provided with an upper chamber 20, which communicates with the inside of the crushing chamber 8. The discharge port 15 is arranged on the upper chamber 20. A rotatably arranged impeller shaft 21 is arranged in the upper chamber 20, the upper end of the impeller shaft 21 extends to the outside of the upper chamber 20 and is drivingly connected with a first power device. The lower end of the impeller shaft 21 extends into the crushing chamber 8, and the lower end of the impeller shaft 21 is provided with the grading impeller assembly 14. When the impeller shaft 21 rotates, the grading impeller assembly 14 is driven to rotate. The upper chamber 20 communicates with the inside of the crushing chamber 8 through the grading impeller assembly 14.

[0035] As shown in FIG. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figures, the inner wall of the lower part of the crushing cavity 8 is provided with a gear ring 10, and the crushing cavity 8 is provided with a horizontally rotating launching disc 9. The launching disc 9 is a material collecting and air exhausting launching disc, and the height of the launching disc 9 is adapted to the height of the gear ring 10. When the launching disc 9 rotates, the gear ring 10 and the launching disc 9 form a crushing pair. When the launching disc 9 rotates, the material accumulated on the launching disc 9 can be launched to the gear ring 10. In this embodiment, a power rotating shaft 22 is vertically arranged in the crushing cavity 8, and the upper end of the power rotating shaft 22 is fixedly installed with the launching disc 9. The lower end of the power rotating shaft 22 extends to the outside of the crushing cavity 8 and is drivingly connected with the second power device. When the power rotating shaft 22 rotates, the launching disc 9 rotates horizontally.

[0036] As shown in the figures, Figure 1 , Figure 2 and Figure 3 As shown in the figures, the gear ring 10 includes an annular mounting plate 11 and a plurality of first lining plates 12 arranged at intervals on the mounting plate 11. The first lining plates 12 are vertically arranged, and the first lining plates 12 and the inner wall of the crushing cavity 8 are provided with a gap to form an air exhaust area 13. In this embodiment, the number of the first lining plates 12 on the mounting plate 11 is one hundred. In actual application, the number of the first lining plates 12 can be adjusted according to the size of the gear ring 10 and the actual application requirements.

[0037] As shown in the figures, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figures, the material collecting and air exhausting launching disc includes a base disc 1 and a plurality of launching flow channels 2 arranged at intervals on the lateral edges of the upper side of the base disc 1. The plurality of launching flow channels 2 are circumferentially arranged along the base disc 1. The base disc 1 is a disc-shaped body with a concave middle part and high edges, which is beneficial to the accumulation of material flow and reduces the gas content in the material to be crushed. The center of the base disc 1 is provided with a mounting hole 7, which is adapted to the upper end of the power rotating shaft 22. Preferably, the mounting hole 7 is rectangular. The upper end of the power rotating shaft 22 penetrates the mounting hole 7, and the upper end of the power rotating shaft 22 is sleeved with a circular truncated cone-shaped material distributing member 23. The material distributing member 23 is fixed to the power rotating shaft 22 by fasteners. The material distributing member 23 and the material collecting and air exhausting launching disc are fixed to the power rotating shaft 22 by fasteners, and the fasteners are preferably screws.

[0038] In this embodiment, fifty-seven launching flow channels 2 are arranged on the base disc 1, and the number of the launching flow channels 2 can be adjusted according to the size of the base disc 1 in actual application. In this embodiment, the launching flow channels 2 are front-inclined flow channels with smooth transitions. That is, when the launching disc 9 is used, the rotating direction of the launching disc 9 is defined as the front direction, and the outer end of the launching flow channel 2 is inclined forward relative to the inner end.

[0039] A ring-shaped cover ring 3 is provided on the upper side of the chassis 1. Multiple spaced stiffeners 4 are provided between the chassis 1 and the cover ring 3. Two adjacent stiffeners 4, and the space between the chassis 1 and the cover ring 3, form the emission channel 2. The stiffeners 4 are provided on the cover ring 3 or the chassis 1. Preferably, in this embodiment, the extension path of the stiffeners 4 is a spiral. The stiffeners 4 are provided on the upper side of the chassis 1, and the chassis 1 has connecting ribs 5 for fixing the cover ring 3. The cover ring 3 is fixedly installed on the connecting ribs 5 of the chassis 1 by fasteners. In practical applications, the number of connecting ribs 5 can be set according to the size of the chassis 1. Preferably, in this embodiment, there are three connecting ribs 5, evenly distributed on the chassis 1. Each of the three connecting ribs 5 has a screw hole, and the cover ring 3 has a through hole corresponding to the screw hole position. The cover ring 3 is fixedly installed on the connecting ribs 5 of the chassis 1 by fastening screws.

[0040] In practical applications, the shape of the emission channel 2 can be changed according to the type of material to be pulverized and the pulverization requirements. For example... Figure 5 As shown, the emission channel 2 is a direct current channel, and multiple emission channels 2 are arranged radially on the chassis 1. Figure 6 As shown, the launching channel 2 is a rearward-sloping channel with a smooth transition. That is, when the launching disk 9 is in use, the rotation direction of the launching disk 9 is defined as forward, and the outer end of the launching channel 2 is inclined backward relative to its inner end; the extension path of the stiffener 4 is a spiral. By changing the shape and path of the launching channel 2, the requirements of different working conditions can be met.

[0041] The chassis 1 is provided with an annular, externally inclined, conical emission surface 6, which extends from the concave part in the middle of the chassis 1 to the emission channel 2.

[0042] like Figure 1 As shown, a tapered tube 19, wider at the top and narrower at the bottom, is provided inside the crushing chamber 8. The tapered tube 19 is located outside the classifying impeller assembly 14, with a gap between the upper end of the tapered tube 19 and the top wall of the crushing chamber 8, and the lower end of the tapered tube 19 is located above the launching disk 9. The feed inlet 16 is located above the gear ring 10. Preferably, in this embodiment, a feeding screw 18 is installed on the feed inlet 16, and the discharge end of the feeding screw 18 extends to the inner side of the tapered tube 19. The feeding screw 18 is used to transport the material to be crushed from the outside to the launching disk 9 inside the crushing chamber 8. The feeding screw 18 is a conventional component in the prior art and will not be described in detail here. Any feeding screw in the prior art that can transport materials can be used in the technical solution of this embodiment.

[0043] The disintegrator works, the discharge port 15 is in a negative pressure state all the time, gas is input into the disintegrating chamber 8 through the air inlet 17, and the gas flow will be formed in the disintegrating chamber 8 from the air inlet 17 to the discharge port 15. Since the conical tube 19 is arranged outside the grading impeller assembly 14, the gas flow entering the disintegrating chamber 8 at the air inlet 17 will rise through the gap between the launching disc 9 and the gear ring 10, and then rise to the upper part of the disintegrating chamber 8 outside the conical tube 19, and then enter the inside of the conical tube 19 along the upper end of the conical tube 19, and finally rise to the upper chamber 20 through the grading impeller assembly 14, and finally be discharged through the discharge port 15. The conical tube 19 divides the space outside the grading impeller assembly 14 in the disintegrating chamber 8 into two parts, the inside of the conical tube 19 and the outside of the conical tube 19, so that the cross-sectional area of the gas flow circulation channel in the disintegrating chamber 8 becomes smaller, the gas flow velocity becomes larger, which is beneficial to driving the disintegrated material to the grading impeller assembly 14 for sorting, and beneficial to timely sorting of qualified materials.

[0044] The first power device drives the grading impeller assembly 14 to rotate horizontally in the disintegrating chamber 8 through the impeller rotating shaft 21. The second power device drives the launching disc 9 to rotate horizontally in the disintegrating chamber 8 through the power rotating shaft 22.

[0045] Firstly, the material is conveyed to the disintegrating chamber 8 by the feeding screw 18 at the feeding port 16, and the material entering the disintegrating chamber 8 first falls on the high-speed rotating launching disc 9. The material falling on the launching disc 9 is tightly attached to the conical launching surface 6 of the launching disc 9 under the action of centrifugal force, and is impacted and collided with the first lining plate 12 of the gear ring 10 through the launching flow channel 2 and is disintegrated. In the process of entering the launching flow channel 2, the air contained in the material can be discharged to the maximum extent, and the useless work on air during disintegration can be effectively avoided. The rib plate 4 is distributed in a spiral line, and the launching flow channel 2 is front-inclined, which is beneficial to the impact of the material to be disintegrated on the first lining plate 12 at a higher linear velocity, and enhances the effect of strong disintegration. The launching flow channel 2 is closed, which reduces the vortex air flow formed on the back of the rib plate 4, obviously reduces the weak disintegration environment, and reduces weak disintegration. At the same time, when the material impacts the first lining plate 12, the air contained in the material can reach the air exhaust area 13 outside the first lining plate 12 through the gap between adjacent first lining plates 12, which can further enhance strong disintegration, reduce weak disintegration, and improve the disintegration efficiency of the disintegrator.

[0046] The disintegrated material moves upward along the gas flow under the action of the gas flow, and when the material passes through the grading impeller assembly 14, the qualified small particle material is sorted by the grading impeller assembly 14, enters the upper chamber 20, and is discharged from the discharge port 15 and collected. The unqualified large particle material falls on the launching disc 9 again under the action of gravity, and is launched to the first lining plate 12 again to be disintegrated.

[0047] In the crushing cavity 8 of the present application, the transmission disc 9 forms a crushing pair with the gear ring 10 when rotating, which can discharge the air contained in the material to the maximum, reduce the air participating in the crushing process, avoid useless work on the air during crushing, effectively reduce the vortex formed in the crushing area, avoid over-crushing of the material, enhance the strong crushing and reduce the weak crushing, make the particle size of the product more concentrated, and improve the crushing efficiency of the crusher and the product quality.

[0048] In summary, the crusher of the present application can weaken the weak crushing environment during the crushing process, reduce the generation of superfine powder, make the particle size of the crushed material more concentrated, improve the product yield, greatly reduce the energy consumption, and has the advantages of simple structure, suitability for practical use and the like.

[0049] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A shredder comprising a shredding chamber (8), characterised in that: The inner wall of the pulverizing cavity (8) is provided with a gear ring (10), and the pulverizing cavity (8) is provided with a horizontal rotating transmission disc (9), which forms a pulverizing pair with the gear ring (10) when rotating; the transmission disc (9) can transmit the material thereon to the gear ring (10) when rotating; The transmission disc (9) comprises a bottom disc (1) and a plurality of spaced transmission flow channels (2) arranged on the upper side edge of the bottom disc (1), and the plurality of transmission flow channels (2) are arranged along the circumference of the bottom disc (1); the bottom disc (1) is a disc-shaped structure with a concave middle portion and a high edge; The gear ring (10) comprises an annular mounting plate (11) and a plurality of spaced first lining plates (12) arranged on the mounting plate (11), and the first lining plates (12) are vertically arranged and are spaced from the inner wall of the pulverizing cavity (8) to form an exhaust area (13).

2. The comminutor of claim 1, wherein: The transmission flow channels (2) are straight channels, and the plurality of transmission flow channels (2) are arranged in a radial manner on the bottom disc (1).

3. The comminutor of claim 1, wherein: The transmission flow channels (2) are front-inclined flow channels with smooth transitions.

4. The comminutor of claim 1, wherein: The transmission flow channels (2) are rear-inclined flow channels with smooth transitions.

5. The comminutor of any one of claims 1 to 4, wherein: The upper side of the bottom disc (1) is provided with an annular cover ring (3), and a plurality of spaced rib plates (4) are arranged between the bottom disc (1) and the cover ring (3), and the two adjacent rib plates (4) and the bottom disc (1) and the cover ring (3) surround the transmission flow channels (2).

6. The comminutor of any one of claims 1 to 4, wherein: The bottom disc (1) is provided with a tapered transmission surface (6) inclined upward from outside, and the tapered transmission surface (6) extends from the concave portion in the middle of the bottom disc (1) to the transmission flow channels (2).

7. The comminutor of any one of claims 1 to 4, wherein: The pulverizing cavity (8) is provided with a horizontal rotating classification impeller assembly (14) arranged at the top of the pulverizing cavity (8); the top of the pulverizing cavity (8) is connected with a discharge port (15) which is in communication with the interior of the pulverizing cavity (8) through the classification impeller assembly (14); The side wall of the pulverizing cavity (8) is provided with a feeding port (16) located above the gear ring (10); and the bottom of the pulverizing cavity (8) is provided with an air inlet (17).

8. The comminutor of claim 7, wherein: The pulverizing cavity (8) is provided with a tapered tube (19) with a large upper end and a small lower end, which is located outside the classification impeller assembly (14), and a gap is formed between the upper end of the tapered tube (19) and the top wall of the pulverizing cavity (8), and the lower end of the tapered tube (19) is located above the transmission disc (9).

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