Anti-blocking wear-resistant feeding chute

Abstract

The invention relates to the technical field of vertical mill material feeding, in particular to an anti-blocking wear-resistant feeding chute which comprises a vertical mill and a material chute body installed on the vertical mill, the material chute body comprises a chute bottom plate, two symmetrical chute side plates installed on the chute bottom plate and a pneumatic assembly, and the pneumatic assembly is arranged on the chute bottom plate. The chute bottom plate is installed on the material chute and used for shaking the chute bottom plate, a sealing assembly is arranged on the chute bottom plate, and the pneumatic assembly is installed on the sealing assembly; the exhaust assembly is mounted on the sealing assembly and used for exhausting gas in the sealing assembly; the protection assembly is mounted on the material chute and is used for preventing materials from the vertical mill from falling into the material chute; and the matching assembly is installed in the material chute and used for being matched with the pneumatic assembly for use, and the materials on the bottom plate of the chute can be more quickly disengaged through the use of the matching assembly and the pneumatic assembly.

Description

Technical Field

[0001] The invention relates to the technical field of vertical mill material feeding, in particular to an anti-blocking and wear-resistant feeding chute. Background Art

[0002] Vertical mill is also called vertical grinding machine. Its principle is that the motor drives the grinding disc to rotate through the reducer, and hot air enters the vertical mill body from the bottom air inlet. The material falls into the center of the grinding disc through the feed chute from the feed port. Under the action of centrifugal force, the material moves evenly from the center of the grinding disc to the edge. When passing through the grinding roller area on the grinding disc, it is crushed by the grinding roller. Large pieces of material are directly crushed, and fine particles are squeezed to form a material bed for inter-particle crushing. The crushed material continues to move to the edge of the grinding disc until it is taken away by the strong airflow at the wind ring, and the larger particles fall back onto the grinding disc to continue to be crushed. When the material in the airflow passes through the upper separator, the rotor rotates at high speed, the rotor blades collide with the particles, and give the material a larger circumferential speed, generating a larger centrifugal force, so that large and small particles are separated. Fine particles can pass through the rotor to go out of the mill and be collected by the dust collector, and large particles fall into the grinding disc for re-grinding.

[0003] The traditional feed chute is a U-shaped chute with no cover on the top and a flat bottom plate at the bottom. The material flows from the feed port through the chute into the mill depending on the installation angle of the chute. For non-sticky materials, most traditional feed chutes are used because of their simple structure and convenient installation. They are currently the main form of use on vertical mills. However, when the material entering the mill is sticky or has a certain viscosity due to humidity and other reasons, the disadvantages of the traditional feeding chute will appear. The first disadvantage is that the material forms an adhesion layer in the chute. When the adhesion layer is in an accumulated state, the amount of material entering the mill becomes less, resulting in a decrease in the milling efficiency. When the adhesion layer accumulates to a certain extent, it suddenly breaks and falls into the mill. The amount of material entering the mill suddenly increases, exceeding the normal grinding capacity of the mill itself, causing a large amount of unground material to circulate repeatedly in the mill, thereby reducing the stability of the mill. In a short period of time, the mill will produce abnormal noise due to overload operation, and at the same time, it will aggravate the wear of the inner wall of the mill and reduce the service life of related parts. The second disadvantage is even worse. The material adhesion layer will accumulate more and more at the feed inlet, blocking the feed inlet, causing the material to accumulate at the feed inlet and the upper part in a short period of time, forcing the production system to shut down. In severe cases, it will also cause damage to the feeding equipment at the front end of the feed inlet. Once the blockage occurs, it is a large consumption of manpower and material resources, and the overall production efficiency will be seriously affected. At the same time, the bottom plate of this chute is in direct contact and friction with the material, and does not have good wear resistance (compared with the same bottom plate material), and the service life of the chute is short.

[0004] At this time, a new device was invented to solve the above-mentioned problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an anti-blocking and wear-resistant feed chute.

[0006] The present invention provides an anti-blocking and wear-resistant feed chute, comprising: a vertical mill and a material chute installed on the vertical mill, the material chute comprising a chute bottom plate, two symmetrical chute side plates installed on the chute bottom plate, a pneumatic component, which is installed on the material chute and used to shake the chute bottom plate, a closing component is provided on the chute bottom plate, the pneumatic component is installed on the closing component; an exhaust component, which is installed on the closing component and used to discharge the gas in the closing component; a protective component, which is installed on the material chute and used to prevent the material from the vertical mill from falling into the material chute; a matching component, which is installed in the material chute and used to cooperate with the pneumatic component, and the use of the matching component and the pneumatic component can make the material on the chute bottom plate fall off more quickly.

[0007] Preferably, the closing component includes two symmetrical baffles installed on the chute bottom plate and a bottom plate installed on the baffles, the chute bottom plate, the baffles and the bottom plate form an inflation space, one end of the inflation space is sealed by a connecting flange, and a closing plate is installed on the other end of the inflation space, and the closing plate is installed on the baffle plate or the bottom plate or the material chute by bolts, the pneumatic component includes an air intake pipe arranged on the baffle plate or the bottom plate, a pulse valve is arranged on the pulse valve, an air cannon is arranged on the pulse valve, and a branch check valve is arranged on the other end of the air cannon, and the exhaust component consists of a first exhaust hole opened on the baffle and a second exhaust hole opened on the closing plate.

[0008] Preferably, the protective assembly includes a top plate installed on the chute side plate and an inspection cover installed on the top plate, the top plate is at least one in number and is plugged into the chute side plate, the inspection cover is fixed to the top plate by bolts, and a handle is provided on the top plate, the handle is at least one in number.

[0009] Preferably, the mating component is a vertical plate installed on the side plate of the chute, there is at least one vertical plate and the vertical plate is arranged at intervals on the inner wall of the side plate of the chute, the vertical plate is close to the bottom plate of the chute, and the distance between the vertical plate and the bottom plate of the chute is the material collision space.

[0010] Preferably, the material chute is provided with an inner chute flange and an outer chute flange fixed to the vertical mill.

[0011] Compared with the related art, the anti-blocking and wear-resistant feeding chute provided by the present invention has the following beneficial effects: the chute bottom plate can be impacted periodically through the air intake pipe and the external device, and the chute bottom plate will vibrate at this time, which will destroy the sticky material on the chute bottom plate, thereby helping the material to enter the vertical mill smoothly. At the same time, taking advantage of the easy adhesion of sticky materials, vertical plates are arranged on the side plates of the chute, and the material is easy to form a material layer between the chute bottom plate and the vertical plates. Most of the material falls into the machine body through the material layer and does not directly contact the chute bottom plate. This method will form the material on the vertical plate It forms a counteraction with the material on the chute bottom plate. As long as the chute bottom plate vibrates, it will form a counteraction between material and material. When there is no vibration, the vertical plate can also bear part of the pressure, which also reduces the pressure on the chute bottom plate and improves the wear resistance and service life of the chute bottom plate. The chute bottom plate is impacted at a certain frequency to vibrate the chute bottom plate, and the material will not form a material layer due to the vertical plate, which will cause accumulation and blockage. The combination of the two can achieve the effect of anti-wear. At the same time, there is a certain distance between the vertical plate and the chute bottom plate, so that when the chute bottom plate vibrates and deforms, the vertical plate will not be deformed.

[0012] In the above-described use, the chute bottom plate is impacted by the vertical plate and the air inlet pipe, and the chute bottom plate will shake, so that the sticky materials attached to the chute bottom plate can be vibrated off. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the original material chute structure; Figure 2 A three-dimensional schematic diagram of the present invention Figure 1 ; Figure 3 A three-dimensional schematic diagram of the present invention Figure 2 ; Figure 4 is a side view of the present invention; Figure 5 is a side cross-sectional view of the present invention; Figure 6 A top view of the present invention; Figure 7 It is a schematic diagram of the top plate structure of the present invention; Figure 8 It is a schematic diagram of the closing plate structure of the present invention; Fig. 9 It is the flow chart of the air flow process of the present invention.

[0014] Numbers in the figure: 1. Chute side panel; 2. Inspection cover; 3. Handle; 4. Vertical panel; 5. First exhaust hole; 6. Chute bottom plate; 7. Bottom plate; 8. Air inlet pipe; 9. Closing plate; 10. Top plate; 11. Chute outer flange; 12. Chute inner flange; 13. Second exhaust hole; 14. Branch check valve; 15. Air cannon; 16. Pulse valve. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0017] See also Figures 1 to 9 An anti-blocking and wear-resistant feed chute provided by an embodiment of the present invention includes: a vertical mill and a material chute installed on the vertical mill, the material chute includes a chute bottom plate 6, two symmetrical chute side plates 1 installed on the chute bottom plate 6, a pneumatic component, which is installed on the material chute and used to shake the chute bottom plate 6, a closing component is provided on the chute bottom plate 6, and a pneumatic component is installed on the closing component; an exhaust component is installed on the closing component and used to discharge the gas in the closing component; a protective component is installed on the material chute and used to prevent the material from the vertical mill from falling into the material chute; a matching component is installed in the material chute and used to cooperate with the pneumatic component. The use of the matching component and the pneumatic component can make the material on the chute bottom plate 6 fall off more quickly.

[0018] In this embodiment, the chute bottom plate 6 can be impacted periodically through the air intake pipe 8 and the external device, and the chute bottom plate 6 will vibrate at this time, which will destroy the sticky material on the chute bottom plate 6, thereby helping the material to smoothly enter the vertical mill. At the same time, taking advantage of the fact that sticky materials are easy to adhere, a vertical plate 4 is provided on the chute side plate 1, and the material is easy to form a material layer between the chute bottom plate 6 and the vertical plate 4. Most of the material falls into the machine body through the material layer and does not directly contact the chute bottom plate 6. In this way, the material on the vertical plate 4 will form a confrontation with the material on the chute bottom plate 6. As long as the chute bottom plate 6 vibrates, a material-to-material confrontation will be formed. When no vibration is performed, the vertical plate 4 can also To bear part of the pressure, this also reduces the pressure on the chute bottom plate 6, improves the wear resistance and service life of the chute bottom plate 6, and impacts the chute bottom plate 6 at a certain frequency, which causes vibration to the chute bottom plate 6, and prevents the material from easily forming a material layer due to the vertical plate 4, thereby causing accumulation and blockage. The combination of the two can simultaneously achieve the effect of anti-wear. At the same time, there is a certain distance between the vertical plate 4 and the chute bottom plate 6, so that when the chute bottom plate 6 vibrates and deforms, the vertical plate 4 will not be deformed. The above-described use, through the vertical plate 4 and the air intake pipe 8 to impact the chute bottom plate 6, the chute bottom plate 6 will shake, so that the sticky material attached to the chute bottom plate 6 can be vibrated off.

[0019] The closing component includes two symmetrical baffles installed on the chute bottom plate 6 and a bottom plate 7 installed on the baffles. The chute bottom plate 6, the baffles and the bottom plate 7 form an inflation space. One end of the inflation space is blocked by a connecting flange, and a closing plate 9 is installed on the other end of the inflation space. The closing plate 9 is installed on the baffle or the bottom plate 7 or the material chute by bolts. The pneumatic component includes an air intake pipe 8 arranged on the baffle or the bottom plate 7, and a pulse valve 16 is arranged on the other end of the air intake pipe 8. An air cannon 15 is arranged on the pulse valve 16, and a branch check valve 14 is arranged on the other end of the air cannon 15. The exhaust component is a first exhaust hole 5 opened on the baffle and a second exhaust hole 13 opened on the closing plate 9.

[0020] In this embodiment, the reason for adopting the design of the air leakage hole is that when the compressed gas comes into the inflation space, in order to achieve a better impact and vibration effect on the chute bottom plate 6, the air leakage hole is slowly released. At this time, the chute bottom plate 6 can be impacted instantly, which can achieve a better vibration effect of the entire chute bottom plate 6 than the design of the opening.

[0021] Subsequent designs can design the air intake pipe 8 to be at different angles, so that different impact effects can be achieved.

[0022] The protective assembly includes a top plate 10 installed on the chute side plate 1 and an inspection cover 2 installed on the top plate 10. There is at least one top plate 10 and it is plugged into the chute side plate 1. The inspection cover 2 is fixed to the top plate 10 by bolts. A handle 3 is provided on the top plate 10, and there is at least one handle 3.

[0023] In this embodiment, in order to prevent materials that have not been selected by the vertical mill from falling from the top and entering the device, thereby reducing the entire internal volume, a top plate 10 and an inspection cover 2 are installed on the chute side plate 1. The inspection cover 2 is installed in a detachable manner, which can effectively achieve convenient and quick disassembly and assembly, saving time and effort.

[0024] The matching component is a vertical plate 4 installed on the chute side plate 1. There is at least one vertical plate 4 and they are arranged at intervals on the inner wall of the chute side plate 1. The vertical plate 4 is close to the chute bottom plate 6, and the distance between the vertical plate 4 and the chute bottom plate 6 is the material collision space.

[0025] In this embodiment, a vertical plate 4 is provided on the chute side plate 1, and the material is easy to form a material layer between the chute bottom plate 6 and the vertical plate 4. Most of the materials fall into the machine body through the material layer and do not directly contact the chute bottom plate 6. In this way, the materials on the vertical plate 4 will form a confrontation with the materials on the chute bottom plate 6. As long as the chute bottom plate 6 vibrates, the material will resist the material. When there is no vibration, the vertical plate 4 can also withstand part of the pressure, which also reduces the pressure on the chute bottom plate 6 and improves the wear resistance and service life of the chute bottom plate 6.

[0026] At the same time, the vertical plate 4 cannot be fixed to the chute bottom plate 6, which will increase the rigidity of the chute bottom plate 6 and make the elastic deformation and impact vibration effects of the chute bottom plate 6 worse.

[0027] The material chute is provided with an inner chute flange 12 and an outer chute flange 11 fixed to the vertical mill.

[0028] In this embodiment, the design of the inner flange 12 and the outer flange 11 of the chute can effectively fix the entire material chute on the vertical mill. The two designs are more stable than a single design, avoiding the problem of the entire material chute falling off due to loose installation when impacting the chute bottom plate 6.

[0029] The specific usage of this device is that the qualified compressed air source generated by the air source device of the external system passes through the branch one-way valve 14, and the branch one-way valve 14 stores a certain amount of compressed gas in the air cannon 15. A pulse valve 16 is installed on the air cannon 15, and the pulse valve 16 is connected to the air inlet pipe 8. The branch one-way valve 14 only allows gas to flow in one direction, which can prevent gas backflow or mixing, and can effectively ensure the stability of the gas pressure in the air cannon 15; the air cannon 15 is also called an air flow aid, and its body can store a certain amount of compressed gas. Due to the gas pressure difference, it can be used with the pulse valve 16 to suddenly spray out a strong compressed airflow, and the high pressure and high speed can generate a strong impact force; the pulse valve 16 is a diaphragm valve that can open and close the high-pressure air source to generate pulses in an instant, and the on and off of the pulse valve 16 can be controlled by the program. The pulse valve 16 is close to the air inlet pipe 8, so that the impact effect is better; It is specially pointed out again that most of the supporting production systems of vertical mills are equipped with air source devices. In most cases, this solution only requires the additional addition of branch check valves 14, air cannons 15, pulse valves 16 and branch pipelines. The economic cost of this part is negligible compared to the vertical mill equipment itself, so this solution meets the economic requirements in most cases.

[0030] In this way, the air inlet pipe 8 and the external device can periodically impact the chute bottom plate 6, and the chute bottom plate 6 will vibrate. At the same time, the design of the vertical plate 4 can achieve the effect of material resisting material. The vertical plate 4 and the air inlet pipe 8 impact the chute bottom plate 6, and the chute bottom plate 6 will shake, so that the sticky material attached to the chute bottom plate 6 can be vibrated off.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plug-proof and wear-resistant feed chute, comprising: A vertical mill and a material chute mounted on the vertical mill, wherein the material chute comprises a chute bottom plate (6) and two symmetrical chute side plates (1) mounted on the chute bottom plate (6), characterized in that: A pneumatic component is mounted on the material chute and is used to cause the chute bottom plate (6) to shake. A sealing component is provided on the chute bottom plate (6), and the pneumatic component is mounted on the sealing component; An exhaust assembly, which is mounted on the closed assembly and is used to exhaust the gas in the closed assembly; A protection assembly, which is installed on the material chute and is used to prevent the material from the vertical mill from falling into the material chute; A matching component is installed in the material chute and is used in conjunction with the pneumatic component. The use of the matching component and the pneumatic component can more quickly remove the material on the chute bottom plate (6).

2. The anti-blocking and wear-resistant feed chute according to claim 1, characterized in that: The sealing assembly comprises two symmetrical shielding plates mounted on a chute bottom plate (6) and a bottom plate (7) mounted on the shielding plates. The chute bottom plate (6), the shielding plates and the bottom plate (7) form an inflation space. One end of the inflation space is sealed by a connecting flange. A sealing plate (9) is mounted on the other end of the inflation space. The sealing plate (9) is mounted on the shielding plate or the bottom plate (7) or the material chute by bolts.

3. The anti-blocking and wear-resistant feed chute according to claim 2, characterized in that: The pneumatic assembly comprises an air intake pipe (8) arranged on a baffle plate or a bottom plate (7), a pulse valve (16) being arranged at the other end of the air intake pipe (8), an air cannon (15) being arranged on the pulse valve (16), and a branch check valve (14) being arranged at the other end of the air cannon (15).

4. The anti-blocking and wear-resistant feed chute according to claim 3, characterized in that: The exhaust assembly comprises a first exhaust hole (5) opened on the shielding plate and a second exhaust hole (13) opened on the closing plate (9).

5. The anti-blocking and wear-resistant feed chute according to claim 1, characterized in that: The protection assembly comprises a top plate (10) mounted on a chute side plate (1) and an inspection cover (2) mounted on the top plate (10); the top plate (10) is at least one and is plugged into the chute side plate (1); and the inspection cover (2) is fixed to the top plate (10) by bolts.

6. The anti-blocking and wear-resistant feed chute according to claim 5, characterized in that: The top plate (10) is provided with a handle (3), and there is at least one handle (3).

7. The anti-blocking and wear-resistant feed chute according to any one of claims 1 to 3, characterized in that: The matching component is a vertical plate (4) mounted on the chute side plate (1), and the number of the vertical plate (4) is at least one and is arranged at intervals on the inner wall of the chute side plate (1).

8. The anti-blocking and wear-resistant feed chute according to claim 7, characterized in that: The vertical plate (4) is close to the chute bottom plate (6), and the distance between the vertical plate (4) and the chute bottom plate (6) is a material collision space.

9. The anti-blocking and wear-resistant feed chute according to claim 1, characterized in that: The material chute is provided with an inner chute flange (12) and an outer chute flange (11) fixed to the vertical mill.

Images