Vertical grinding machine

Abstract

This application provides a vertical grinder, which includes a grinding cylinder, a cover plate, and a stirring device. The grinding cylinder has a receiving cavity with a top opening for containing materials and grinding media. The cover plate is disposed on the grinding cylinder to cover and seal the opening of the receiving cavity, and the cover plate has a first through hole. The stirring device includes a stirring shaft that extends into the receiving cavity through the first through hole and is sealed to the cover plate. In the vertical grinder provided by this application, the cover plate covers and seals the opening of the receiving cavity to prevent materials and grinding media from escaping from the gap between the cover plate and the grinding cylinder. The stirring shaft is sealed to the cover plate to prevent materials and grinding media from escaping from the gap between the cover plate and the stirring shaft.

Description

Technical Field

[0001] This application relates to the field of material grinding technology, and in particular to a vertical grinding mill. Background Technology

[0002] Natural asphalt, also known as geoasphalt or mineral asphalt, is formed when its lightweight components evaporate and, under sunlight, are reacted with oxygen in the air to polymerize into mineral asphalt. It is primarily composed of asphaltenes, resins, gums, and small amounts of other inorganic substances such as metals and non-metals. Raw natural asphalt ore is processed into asphalt powder, and processing fluid is added to this powder to form a natural asphalt mixture slurry. A vertical grinder is used to grind this natural asphalt mixture slurry to the target size. Typically, a vertical grinder includes a grinding cylinder and a cover plate. The grinding cylinder forms a cavity with an open top, which holds the natural asphalt mixture slurry and grinding media. Since the cover plate merely covers the opening of the cavity, the natural asphalt mixture slurry and grinding media can easily escape from the gap between the cover plate and the grinding cylinder. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to provide a vertical grinding mill that can prevent natural asphalt mixture and grinding media from leaking out from the gap between the cover plate and the grinding cylinder. To achieve the above objective, the technical solution of this application is implemented as follows:

[0004] This application provides a vertical grinding machine, including:

[0005] A grinding cylinder having a receiving cavity with a top opening for containing materials and grinding media;

[0006] A cover plate, disposed on the grinding cylinder, for covering and sealing the opening of the receiving cavity, the cover plate having a first through hole; and

[0007] A stirring device includes a stirring shaft that extends into the receiving cavity through the first through hole and is sealed to the cover plate.

[0008] Furthermore, the vertical grinding machine includes a mechanical seal structure or a packing seal structure disposed on the first through hole, and the stirring shaft is sealed to the cover plate through the mechanical seal structure or the packing seal structure;

[0009] And / or, the vertical grinder includes a sealing gasket disposed between the cover plate and the grinding cylinder.

[0010] Furthermore, the vertical grinding machine includes an electrical control cabinet frame spaced apart from the grinding cylinder, and the stirring device includes a drive source for driving the stirring shaft to rotate, the drive source being mounted on the electrical control cabinet frame.

[0011] Furthermore, the grinding cylinder includes a cylinder having the receiving cavity and a partition wall disposed within the cylinder, the partition wall dividing the receiving cavity into a grinding cavity and a flow guiding cavity that communicate with each other, the flow guiding cavity being disposed around the upper part of the grinding cavity;

[0012] The cover plate includes a central sub-plate and an annular sub-plate. The annular sub-plate surrounds the outer periphery of the central sub-plate. The central sub-plate is disposed on the partition wall to cover the grinding chamber. The annular sub-plate is disposed on the cylinder and the central sub-plate to cover the flow guide cavity. The first through hole is formed on the central sub-plate. The stirring shaft extends into the grinding chamber. The central sub-plate and the annular sub-plate are detachably connected.

[0013] Furthermore, the annular sub-plate includes multiple sector plates, which are sequentially spliced ​​end to end to form the annular sub-plate.

[0014] Furthermore, the vertical grinder includes a screen disposed within the receiving cavity, and a second through hole is formed on the partition wall to connect the flow guiding cavity and the grinding cavity, and the screen is disposed on the partition wall to cover the second through hole.

[0015] Furthermore, the side wall of the cylinder is formed with at least one inspection port communicating with the flow guiding cavity;

[0016] And / or, the sidewall of the cylinder is formed with at least one inspection port communicating with the grinding chamber.

[0017] Furthermore, the vertical grinding machine includes a feeding hopper and a switching valve. The feeding hopper is located on the central sub-plate and is connected to the grinding chamber. The feeding hopper is used to input the grinding medium into the grinding chamber, and the switching valve is used to control the feeding hopper.

[0018] Furthermore, the vertical grinding machine includes a pressure gauge disposed on the central sub-plate, the pressure gauge being used to detect the pressure within the grinding chamber; and / or,

[0019] The vertical grinding machine includes a temperature gauge mounted on the central subplate, which is used to detect the temperature inside the grinding chamber.

[0020] Furthermore, the cylinder has a feed inlet, a discharge outlet, and a discharge port. The feed inlet is located at the lower part of the cylinder and communicates with the grinding chamber. The discharge outlet is located at the upper part of the cylinder and communicates with the guide chamber. The discharge port is located at the bottom of the cylinder and communicates with the grinding chamber. The discharge port is used to discharge the grinding media.

[0021] The vertical grinder provided in this application embodiment has a cover plate that seals the opening of the receiving cavity to prevent materials and grinding media from escaping from the gap between the cover plate and the grinding cylinder; the stirring shaft is sealed to the cover plate to prevent materials and grinding media from escaping from the gap between the cover plate and the stirring shaft. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a vertical grinding machine according to an embodiment of this application;

[0023] Figure 2 for Figure 1 A partial sectional view of the structure shown;

[0024] Figure 3 This is a schematic diagram of the structure of a cover plate in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures

[0026] Grinding cylinder 100; receiving cavity 100a; grinding cavity 100a'; guide cavity 100a”; cylinder body 110; inspection port 110a; maintenance port 110b; feed inlet 110c; discharge port 110d; discharge outlet 110e; cover plate 200; first through hole 200a; center sub-plate 210; annular sub-plate 220; fan-shaped plate 221; stirring device 300; stirring shaft 310; drive source 320; packing seal structure 400; electrical control cabinet frame 500; screen 600; switch valve 700; feeding hopper 800; pressure gauge 900; temperature gauge 1000; discharge valve 1100. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0028] In the description of this application, it should be understood that these directional terms are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Please see Figures 1-3This application provides a vertical grinding machine, which includes a grinding cylinder 100, a cover plate 200, and a stirring device 300. The grinding cylinder 100 has a receiving cavity 100a with a top opening, which is used to contain materials and grinding media. The cover plate 200 is disposed on the grinding cylinder 100 to cover and seal the opening of the receiving cavity 100a. The cover plate 200 has a first through hole 200a. The stirring device 300 includes a stirring shaft 310, which extends into the receiving cavity 100a through the first through hole 200a. The stirring shaft 310 is sealed to the cover plate 200.

[0030] Because materials overflow from the gaps between the cover plate 200 and the grinding cylinder 100, as well as the gaps between the cover plate 200 and the stirring shaft 310, it is not only environmentally unfriendly, but also requires a reduction in the amount of material input when the overflow is severe, thus reducing production efficiency. The vertical grinder provided in this application embodiment has the cover plate 200 covering and sealing the opening of the receiving cavity 100a to prevent materials and grinding media from overflowing from the gaps between the cover plate 200 and the grinding cylinder 100; the stirring shaft 310 is sealed to the cover plate 200 to prevent materials and grinding media from overflowing from the gaps between the cover plate 200 and the stirring shaft 310.

[0031] Please see Figure 2 The vertical grinding mill includes a mechanical seal structure or a packing seal structure 400 disposed on the first through hole 200a, and the stirring shaft 310 is sealed to the cover plate 200 through the mechanical seal structure or the packing seal structure 400. That is, in one embodiment, the vertical grinding mill includes a mechanical seal structure disposed on the first through hole 200a, and the stirring shaft 310 is sealed to the cover plate 200 through the mechanical seal structure. In another embodiment, the vertical grinding mill includes a packing seal structure 400 disposed on the first through hole 200a, and the stirring shaft 310 is sealed to the cover plate 200 through the packing seal structure 400.

[0032] A mechanical seal structure relies on one or more pairs of end faces perpendicular to the stirring shaft 310 that slide relative to each other, maintaining contact under material pressure and the elastic force (or magnetic force) of the compensation mechanism, combined with an auxiliary sealing structure to achieve leakage prevention. The mechanical seal structure includes components such as a stationary ring, a rotating ring, an elastic element spring seat, a set screw, a rotating ring auxiliary sealing ring, and a stationary ring auxiliary sealing ring. The cooperation between these components seals the gap between the stirring shaft 310 and the cover plate 200, thus achieving leakage prevention.

[0033] The packing seal structure 400 refers to a structure that generates a clamping force between the packing, the stirring shaft 310, and the cover plate 200 through pre-tightening or self-tightening under medium pressure. The packing seal structure 400 includes components such as packing, a packing box, and packing fasteners. The cooperation between these components seals the gap between the stirring shaft 310 and the cover plate 200 to prevent leakage. The packing includes, but is not limited to, asbestos fabric, carbon fiber, rubber, flexible graphite, and engineering plastics. The packing is pre-formed into rings or strips (some packings require pre-impregnation for lubrication) and employs a multi-ring or spiral multi-layer structure. The packing box is used to house the packing. The packing fasteners include glands, bolts, and springs, used to pre-tighten the packing and prevent material leakage during operation; the springs also provide compensation.

[0034] In one embodiment, the vertical grinding machine includes a sealing gasket disposed between the cover plate 200 and the grinding cylinder 100. The sealing gasket is used to seal the gap between the cover plate 200 and the grinding cylinder 100.

[0035] The material of the sealing gasket is not limited, as long as it can seal the gap between the cover plate 200 and the grinding cylinder 100 and withstand a certain temperature. For example, the sealing gasket can be made of rubber.

[0036] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinder includes an electrical control cabinet frame 500 spaced apart from the grinding cylinder 100, and a stirring device 300 includes a drive source 320 for driving the stirring shaft 310 to rotate, the drive source 320 being mounted on the electrical control cabinet frame 500.

[0037] In the prior art, the drive source 320 is usually located on the cover plate 200. Since the drive source 320 is usually heavy, not only is the cover plate 200 subjected to greater stress, but it is also inconvenient to open the cover plate 200 to inspect the structure inside the grinding cylinder 100 during subsequent maintenance of the vertical grinder. For example, it is inconvenient to open the cover plate 200 to inspect the wear-resistant lining inside the grinding cylinder 100, the agitator of the stirring device 300, etc. In addition, in the prior art, materials and grinding media can easily escape from the gap between the cover plate 200 and the grinding cylinder 100, as well as the gap between the cover plate 200 and the stirring shaft 310, and the materials will contaminate the drive source 320.

[0038] In this embodiment, the electrical control cabinet frame 500 and the grinding cylinder 100 are spaced apart. The drive source 320 is set on the electrical control cabinet frame 500, avoiding setting the drive source 320 on the cover plate 200. This not only effectively reduces the pressure on the cover plate 200 and makes it easier to open the cover plate 200 to inspect the structure inside the grinding cylinder 100, but also prevents the drive source 320 from being contaminated by materials.

[0039] For example, the drive source 320 can be a motor.

[0040] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinder includes an electrical control device for controlling the drive source 320, and an electrical control cabinet 500 has space for accommodating the electrical control device. The electrical control cabinet 500 is mounted on a support surface, for example, on the ground. The height of the electrical control cabinet 500 is approximately the same as that of the grinding cylinder 100, and the drive source 320 is located at the top of the electrical control cabinet 500. The drive source 320 is connected to the stirring shaft 310 via a belt. Thus, the drive source 320 drives the stirring shaft 310 to rotate via the belt.

[0041] Understandably, the supporting surface can also be the top surface of other structures.

[0042] In one embodiment, please refer to Figure 2 and Figure 3 The grinding cylinder 100 includes a cylinder 110 with a receiving cavity 100a and a partition wall disposed within the cylinder 110. The partition wall divides the receiving cavity 100a into a grinding cavity 100a' and a flow guiding cavity 100a' that are in communication with each other. The flow guiding cavity 100a' is disposed around the upper part of the grinding cavity 100a'. Specifically, the flow guiding cavity 100a' is used to contain the ground material, and the grinding cavity 100a' is used to contain the grinding media and the material to be ground. The flow guiding cavity 100a' and the grinding cavity 100a' are generally T-shaped. The cover plate 200 includes a central sub-plate 210 and an annular sub-plate 220. The annular sub-plate 220 surrounds the outer periphery of the central sub-plate 210. The central sub-plate 210 is disposed on the partition wall to cover the grinding chamber 100a'. The annular sub-plate 220 is disposed on the cylinder 110 and the central sub-plate 210 to cover the guide chamber 100a'. A first through hole 200a is formed on the central sub-plate 210. The stirring shaft 310 extends into the grinding chamber 100a'. The central sub-plate 210 and the annular sub-plate 220 are detachably connected.

[0043] Since vertical grinders are typically several meters, tens of meters, or even taller, the grinding cylinder 100 and cover plate 200 are usually made of hard metal materials such as steel. The grinding cylinder 100 and cover plate 200 are generally heavy. Therefore, the cover plate 200 is designed with a detachable central sub-plate 210 and annular sub-plate 220. This means that the central sub-plate 210 and annular sub-plate 220 are separate structures, allowing for lighter weights. The central sub-plate 210 can serve as the main load-bearing structure, with the stirring shaft 310 mounted on it. The stirring shaft 310 is sealed to the central sub-plate 210. When maintenance is required on the internal structure of the grinding cylinder 100, the central sub-plate 210 can be removed without disassembling it to avoid affecting the sealing connection between the central sub-plate 210 and the stirring shaft 310. The annular sub-plate 220 can then be removed to maintain the internal structure of the grinding cylinder 100, thus avoiding the need to disassemble the entire cover plate 200.

[0044] Specifically, the center subplate 210 and the annular subplate 220 are detachably connected, including but not limited to bolt connections.

[0045] In one embodiment, please refer to Figure 2 The vertical grinder includes a screen 600 disposed within a receiving cavity 100a. A second through hole is formed on the partition wall, connecting the guide cavity 100a” and the grinding cavity 100a'. The screen 600 is disposed on the partition wall to cover the second through hole. Specifically, the screen 600 is located at the upper part of the cylinder 110 and is used to filter materials. The material to be ground and the grinding media are contained in the grinding cavity 100a'. The ground material passes through the screen 600 and enters the guide cavity 100a”. Since the material and a very small amount of grinding media may cause some wear and compression to the screen 600, the screen 600 may become ineffective and require maintenance or replacement. Therefore, when maintaining or replacing the screen 600, the annular sub-plate 220 can be disassembled to remove or insert the screen 600.

[0046] In one embodiment, please refer to Figure 3 The annular subplate 220 includes multiple sector plates 221, which are sequentially spliced ​​end to end to form the annular subplate 220. Each sector plate 221 is lighter, making it easier to manufacture, handle, and load / unload.

[0047] It should be noted that the cross-sectional shape of the grinding cylinder 100 is usually circular or elliptical. Therefore, the opening of the receiving cavity 100a is also circular or elliptical, and the cover plate 200 is correspondingly circular or elliptical to seal and cover the opening of the receiving cavity 100a. This also makes the central sub-plate 210 usually circular or elliptical, while the annular sub-plate 220 is annular or elliptical.

[0048] It is understood that in some embodiments, the cross-sectional shape of the grinding cylinder 100 may also be polygonal, such as quadrilateral, pentagon, etc., and the opening of the receiving cavity 100a may also be polygonal. Therefore, the cover plate 200 may be a corresponding polygon, which also means that the central sub-plate 210 may be polygonal, circular, or elliptical, and the annular sub-plate 220 may be a corresponding polygon with a missing central area. For example, if the cross-sectional shape of the grinding cylinder 100 is quadrilateral, and the opening of the receiving cavity 100a is also quadrilateral, then the cover plate 200 may be a corresponding quadrilateral. This also means that the central sub-plate 210 may be polygonal, circular, or elliptical, and the annular sub-plate 220 may be a corresponding quadrilateral with a missing central area. The shapes of the grinding cylinder 100, cover plate 200, etc., are not limited in the embodiments of this application.

[0049] In one embodiment, please refer to Figure 2 and Figure 3The stirring device 300 includes multiple stirrers. One end of the stirring shaft 310 is connected to the drive source 320, and the other end of the stirring shaft 310 extends into the grinding chamber 100a' through the first through hole 200a. The stirrers are mounted on the stirring shaft 310 and located within the grinding chamber 100a'. The drive source 320 drives the stirring shaft 310 to rotate, which in turn drives the stirrers to move. The stirrers agitate the material and grinding media within the grinding chamber 100a', resulting in a more uniform mixture and higher frequency of contact between the material and the grinding media. This allows for more thorough grinding of the material by the grinding media, leading to a better grinding effect.

[0050] In one embodiment, please refer to Figure 1 The side wall of the cylinder 110 has at least one inspection port 110a communicating with the guide cavity 100a”. The operator can inspect the material and / or other structures in the guide cavity 100a” through the inspection port 110a. For example, when a screen 600 is provided in the receiving cavity 100a, the operator can inspect and clean the screen 600 through the inspection port 110a so as to repair or replace the screen 600 in a timely manner.

[0051] In one embodiment, please refer to Figure 1 The side wall of the cylinder 110 has at least one inspection port 110b communicating with the grinding chamber 100a'. The inspection port 110b is also called a manhole, through which workers inspect and clean the stirring device 300, such as the stirring shaft 310, the agitator, etc.

[0052] To facilitate the inspection and cleaning of agitators at different heights, in one embodiment, please refer to [reference needed]. Figure 1 The number of inspection ports 110b is multiple, and the multiple inspection ports 110b are arranged at intervals along the height direction of the cylinder 110. For example, the number of inspection ports 110b is two, and the two inspection ports 110b are arranged at intervals along the height direction of the cylinder 110.

[0053] It should be noted that in the embodiments of this application, "multiple" refers to two or more.

[0054] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinding mill includes a feeding hopper 800 and a switching valve 700. The feeding hopper 800 is located on the central sub-plate 210 and is connected to the grinding chamber 100a'. The feeding hopper 800 is used to input grinding media into the grinding chamber 100a', and the switching valve 700 is used to control the feeding hopper 800. The input of grinding media into the grinding chamber 100a' is controlled by opening and closing the switching valve 700. When the vertical grinding mill is performing grinding operations, the switching valve 700 is closed to prevent material and grinding media from overflowing from the feeding hopper 800.

[0055] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinding machine includes a pressure gauge 900 mounted on a central subplate 210, which is used to detect the pressure inside the grinding chamber 100a'.

[0056] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinding machine includes a temperature gauge 1000 mounted on a central subplate 210, which is used to detect the temperature inside the grinding chamber 100a'.

[0057] For example, the vertical grinding mill of this application embodiment is used to grind natural asphalt mixture slurry, that is, the material is natural asphalt mixture slurry. When the above-mentioned vertical grinding mill is used to grind natural asphalt mixture slurry, it is necessary to heat the natural asphalt mixture slurry inside the cylinder 110 so that the natural asphalt mixture slurry remains a liquid with good fluidity at a certain temperature. Therefore, the vertical grinding mill may also include a heat-conducting device for heating the natural asphalt mixture slurry inside the cylinder 110. The heat-conducting device is configured to transfer heat to the natural asphalt mixture slurry inside the cylinder 110. The heat-conducting device may include a heat-conducting pipe wound around the outside of the cylinder 110, and a high-temperature heat-conducting substance flows inside the heat-conducting pipe; or, the cylinder 110 includes an inner cylinder and an outer cylinder sleeved outside the inner cylinder, with a gap between the inner cylinder and the outer cylinder. The heat-conducting device may include a heat-conducting cavity located between the inner cylinder and the outer cylinder, and a high-temperature heat-conducting substance can flow inside the heat-conducting cavity. The high-temperature heat-conducting substance transfers heat to the natural asphalt mixture slurry, keeping it in a liquid state. Since the material inside the grinding chamber 100a' has a certain pressure and temperature, the pressure inside the grinding chamber 100a' can be monitored by the pressure gauge 900 to avoid excessive pressure inside the grinding chamber 100a'; the pressure inside the grinding chamber 100a' can be monitored by the temperature gauge 1000 to avoid excessively high or low temperature inside the grinding chamber 100a'.

[0058] It should be noted that the heat-conducting material is a high-temperature liquid that can transfer heat to the material, such as heat-conducting oil, or other liquids used for heat conduction. As long as the heat-conducting material in the spacer channel can transfer heat to the natural asphalt mixture and maintain the temperature of the natural asphalt mixture, it is sufficient.

[0059] In one embodiment, please refer to Figure 1 and Figure 2The cylinder 110 has an inlet 110c, an outlet 110d, and a discharge port 110e. The inlet 110c is located at the lower part of the cylinder 110 and communicates with the grinding chamber 100a'. The outlet 110d is located at the upper part of the cylinder 110 and communicates with the guide chamber 100a'. The discharge port 110e is located at the bottom of the cylinder 110 and communicates with the grinding chamber 100a'. The discharge port 110e is used to discharge grinding media. Specifically, the inlet 110c is used to input the material to be ground into the grinding chamber 100a'; the outlet 110d is used to discharge the ground material from the guide chamber 100a'.

[0060] Under pressure, the material enters the grinding chamber 100a' through the feed inlet 110c located at the bottom of the cylinder 110 and mixes with the grinding media inside the grinding chamber 100a'. Under pressure, the material moves from bottom to top within the grinding chamber 100a'. The material at the bottom of the grinding chamber 100a' consists of larger particles to be ground, while the material at the top consists of smaller particles after grinding. The upward movement of the material within the cylinder 110, coupled with the downward movement of the grinding media under its own gravity, creates opposite directions of motion. Simultaneously, the stirring device 300 agitates the material and grinding media within the grinding chamber 100a'. Therefore, most of the grinding media is uniformly mixed with the material under the combined effects of pressure, gravity, and the stirring action of the stirring device 300. This high-frequency contact between the material and the grinding media ensures more thorough grinding and a better grinding effect. A small portion of the grinding media gradually deposits at the bottom of the cylinder 110 under gravity, resulting in a higher density of grinding media in the lower part of the cylinder 110. The discharge port 110e is located at the bottom of the cylinder 110, which not only facilitates the complete discharge of grinding media deposited in the lower part of the cylinder 110, but also allows for pressure release in case of abnormal pressure in the grinding chamber 100a', preventing excessive pressure in the grinding chamber 100a'. A small portion of the grinding media, mixed with the material, is carried upwards to the upper part of the cylinder 110. The grinding media moving upwards under its own gravity moves at a slower speed, resulting in less pressure on the screen 600 and preventing wear on the screen 600. Under gravity, the grinding media gradually moves downwards. Therefore, the amount of grinding media in the upper part of the cylinder 110 is less and has a lower density, preventing clogging of the screen 600. Furthermore, since the discharge port 110d is located in the upper part of the cylinder 110, the grinding media deposited in the lower part of the cylinder 110 will not cause wear or clogging to the screen 600. After grinding, the material enters the guide cavity 100a through the screen 600. The guide cavity 100a can hold a certain volume of material, so that the material entering the guide cavity 100a has a buffer space, which prevents the ground material from directly entering the discharge port 110d through the screen 600, and avoids the material from causing excessive compression of the screen 600 and damaging the screen 600.

[0061] In one embodiment, please refer to Figure 1 and Figure 2 The vertical grinding mill includes a heated discharge valve 1100, which is located at the discharge port 110e. Since natural asphalt mixture slurry easily solidifies at low temperatures at the discharge port 110e, making it inconvenient to discharge the grinding media, the discharge valve 1100 has a heating function to prevent the natural asphalt mixture slurry from solidifying at low temperatures at the discharge port 110e. Specifically, the discharge valve 1100 can be a ball valve.

[0062] It should be noted that the vertical grinding mill provided in this application embodiment can be used not only for grinding natural asphalt mixtures, but also for grinding other substances.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vertical grinding machine, characterized in that, include: A grinding cylinder having a receiving cavity with a top opening for containing materials and grinding media; A cover plate, disposed on the grinding cylinder, for covering and sealing the opening of the receiving cavity, the cover plate having a first through hole; and A stirring device includes a stirring shaft that extends into the receiving cavity through the first through hole and is sealed to the cover plate; The grinding cylinder includes a cylinder having the receiving cavity and a partition wall disposed within the cylinder. The partition wall divides the receiving cavity into a grinding cavity and a flow guiding cavity that are in communication with each other. The flow guiding cavity is disposed around the upper part of the grinding cavity. The cover plate includes a central sub-plate and an annular sub-plate. The annular sub-plate surrounds the outer periphery of the central sub-plate. The central sub-plate is disposed on the partition wall to cover the grinding chamber. The annular sub-plate is disposed on the cylinder and the central sub-plate to cover the flow guide chamber. The first through hole is formed on the central sub-plate. The stirring shaft extends into the grinding chamber. The central sub-plate and the annular sub-plate are detachably connected. The vertical grinding mill includes a heat-conducting device for heating the material inside the cylinder.

2. The vertical grinding machine according to claim 1, characterized in that, The vertical grinding machine includes a mechanical seal structure or a packing seal structure disposed on the first through hole, and the stirring shaft is sealed to the cover plate through the mechanical seal structure or the packing seal structure; And / or, the vertical grinder includes a sealing gasket disposed between the cover plate and the grinding cylinder.

3. The vertical grinding machine according to claim 1, characterized in that, The vertical grinder includes an electrical control cabinet frame spaced apart from the grinding cylinder, and the stirring device includes a drive source for driving the stirring shaft to rotate, the drive source being mounted on the electrical control cabinet frame.

4. The vertical grinding machine according to claim 1, characterized in that, The annular sub-plate includes multiple sector plates, which are sequentially spliced ​​together end to end to form the annular sub-plate.

5. The vertical grinding machine according to claim 1, characterized in that, The vertical grinder includes a screen disposed in the receiving cavity, and a second through hole is formed on the partition wall to connect the flow guiding cavity and the grinding cavity. The screen is disposed on the partition wall to cover the second through hole.

6. The vertical grinding machine according to claim 1, characterized in that, The side wall of the cylinder is formed with at least one inspection port that communicates with the flow guiding cavity; And / or, the sidewall of the cylinder is formed with at least one inspection port communicating with the grinding chamber.

7. The vertical grinding machine according to claim 1, characterized in that, The vertical grinding machine includes a feeding hopper and a switching valve. The feeding hopper is located on the central sub-plate and is connected to the grinding chamber. The feeding hopper is used to input the grinding medium into the grinding chamber, and the switching valve is used to control the feeding hopper.

8. The vertical grinding machine according to claim 1, characterized in that, The vertical grinding machine includes a pressure gauge mounted on the central subplate, the pressure gauge being used to detect the pressure inside the grinding chamber; And / or, The vertical grinding machine includes a temperature gauge mounted on the central subplate, which is used to detect the temperature inside the grinding chamber.

9. The vertical grinding machine according to claim 1, characterized in that, The cylinder has a feed inlet, a discharge outlet, and a discharge port. The feed inlet is located at the lower part of the cylinder and is connected to the grinding chamber. The discharge outlet is located at the upper part of the cylinder and is connected to the guide chamber. The discharge port is located at the bottom of the cylinder and is connected to the grinding chamber. The discharge port is used to discharge the grinding media.

Images