Rolling mechanism for potassium nitrate raw material grinding equipment

Abstract

The utility model relates to the technical field of potassium nitrate production, concretely is a kind of roller mechanism for potassium nitrate raw material grinding equipment, including pedestal and the side frame of being fixed in pedestal upper side, further include grinding jar body, column core, press roll, annular filter plate and first driving mechanism;Grinding jar body is fixed in the side of side frame by fixing member, and column core top end is rotatably installed on the inner top wall of grinding jar body, and bottom end extends to the below of grinding jar body;There are several vertical extension's protruding teeth on the inner wall of grinding jar body, and several press rolls are spaced apart embedded on the outer circumferential wall of column core;The grinding space is formed between column core outer wall and the inner wall of grinding jar body and between adjacent two press rolls respectively.The utility model adopts the combination structure of protruding teeth on the inner wall of grinding jar body and the press roll embedded on the outer circumferential of column core, forms multiple independent and evenly distributed grinding spaces in the rotation process, realizes the zoning synchronous comminution of raw material, reduces the local accumulation of raw material in the grinding process, improves the uniformity of comminution and equipment processing capacity.

Description

Technical Field

[0001] This utility model relates to the field of potassium nitrate production technology, specifically to a roller pressing mechanism for potassium nitrate raw material grinding equipment. Background Technology

[0002] Potassium nitrate is a colorless, transparent crystal or white powder inorganic compound that is easily soluble in water. It has strong oxidizing properties and decomposes easily when heated, releasing oxygen. In agriculture, it is commonly used as a compound fertilizer containing nitrogen and potassium. In industry, it is an important raw material for manufacturing black powder and can also be used in food processing. Due to its oxidizing properties, it should be kept away from flammable materials and protected from high temperatures or impacts to prevent danger.

[0003] In the production of potassium nitrate, the raw materials need to be pulverized to increase their surface area, accelerate their contact with other materials, promote more complete and faster dissolution and reaction processes, improve raw material utilization and production efficiency, and facilitate the smooth progress of subsequent mixing, filtration and other processes.

[0004] In the existing technology, roller crushing equipment is mainly used to crush potassium nitrate raw materials. Roller crushing equipment has low crushing efficiency for agglomerated materials. Agglomerated materials tend to concentrate on local areas of the roller surface during crushing, resulting in uneven particle size. In some cases, multiple cycles of crushing are required to meet the standard. Utility Model Content

[0005] The purpose of this utility model is to provide a roller pressing mechanism for a potassium nitrate raw material grinding equipment to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A roller pressing mechanism for a potassium nitrate raw material grinding equipment includes a base and a side frame fixed above one side of the base, as well as a grinding tank, a core, pressure rollers, an annular filter plate, and a first driving mechanism. The grinding tank is fixed to the side of the side frame by fasteners. The top of the core is rotatably mounted on the top wall of the grinding tank, and the bottom extends below the grinding tank. Several vertically extending protruding teeth are evenly distributed on the inner wall of the grinding tank, and several pressure rollers are intermittently embedded on the outer peripheral wall of the core. Grinding spaces are formed between the outer wall of the core and the inner wall of the grinding tank, as well as between two adjacent pressure rollers. The annular filter plate is installed at the bottom of the grinding tank and is rotatably connected to the outer wall of the core. The first driving mechanism is located on the side of the side frame and is used to drive the core to rotate.

[0008] Preferably, the outer peripheral wall of the column core is evenly distributed with several mounting grooves, and a mounting shaft is rotatably installed in each mounting groove; the pressure rollers are fixedly mounted on the mounting shafts one by one and are in movable contact with the inner wall of the mounting groove; the top of the column core and the top of the pressure roller are flush and in movable contact with the top wall of the grinding tank; the bottom of the pressure rollers are in movable contact with the upper surface of the annular filter plate.

[0009] Preferably, the first drive mechanism includes a drive motor A, a main gear, and a gear ring; the bottom end of the column core has a base, and the gear ring is fixedly fitted onto the outer wall of the base; a fixed seat is fixed on the side of the side frame, and the drive motor A is fixed on the fixed seat; the main gear is fixed on the output shaft of the drive motor A and meshes with the gear ring accordingly; a first linkage mechanism is provided inside the base, which is used to link the bases to rotate synchronously when the column core rotates.

[0010] Preferably, the first linkage mechanism includes a gear plate and driven gears; the base has an inner cavity, the bottom ends of the mounting shafts all extend into the inner cavity, and each is fixed with a driven gear; a central shaft is fixed at the top of the grinding tank, the central shaft passes through the core and extends into the inner cavity, and the central shaft is rotatably connected to the core; the gear plate is fixed on the end of the central shaft located in the inner cavity; the gear plate meshes with each driven gear.

[0011] Preferably, an L-shaped shell is fixed to the bottom of the grinding tank, and the shell is rotatably connected to the outer wall of the core. An annular collection cavity is formed between the shell, the lower surface of the annular filter plate, and the outer wall of the core. The discharge port on the shell, which communicates with the collection cavity, is connected to a negative pressure pneumatic conveying device.

[0012] Preferably, the top of the grinding tank has a feed inlet for raw materials to fall into the grinding space; a collection tank is fixed on the top of the grinding tank, and the collection tank is connected to the feed inlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] The grinding tank employs a combination structure with protruding teeth on the inner wall and pressure rollers embedded on the outer periphery of the core. During rotation, multiple independent and evenly distributed grinding spaces are formed, enabling synchronous pulverization of raw materials in different zones. This reduces local accumulation of raw materials during the grinding process, improves the uniformity of pulverization, and enhances the equipment's processing capacity.

[0015] Through the meshing transmission mechanism of the gear disc and the driven gear, the pressure roller can rotate on its own axis while revolving, which enhances the dynamic tumbling and multi-dimensional force of the raw material in the grinding space area, improves the shearing and crushing efficiency of agglomerated materials, and enhances the equipment's adaptability to materials and overall grinding efficiency.

[0016] By setting up a casing and negative pressure pneumatic conveying equipment, a negative pressure pneumatic conveying line can be established inside the equipment, realizing the continuous discharge and collection of powder. This not only suppresses dust dispersion and improves the operating environment, but also reduces the risk of explosion. Attached Figure Description

[0017] Figure 1 A three-dimensional schematic diagram of the overall structure of the roller pressing mechanism provided by this utility model; Figure 2 This is a schematic diagram of the overall structure of the grinding equipment in Example 1; Figure 3 for Figure 2 The diagram shows a partial cross-sectional view of the structure. Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the installation of the pressure roller structure in this utility model; Figure 6 This is a schematic diagram of the distribution of the pressure roller structure in this utility model; Figure 7 This is a schematic diagram of the first drive mechanism in this utility model; Figure 8 This is a schematic diagram of the first linkage mechanism in this utility model; Figure 9 This is a schematic diagram of the overall structure of the feeding mechanism; Figure 10 for Figure 9 A cross-sectional view of the structure shown, omitting the side frame; Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point B; Figure 12 This is a schematic diagram of a partial structure inside the feeding hopper and heating tank; Figure 13 This is a schematic diagram of the second linkage mechanism.

[0018] In the diagram: 1. Base; 2. Side frame; 21. Heating tank; 22. Feed hopper; 221. First guide plate; 222. Sealing plate; 23. Shaft; 231. Positioning key block; 24. Annular guide plate; 25. Second guide plate; 251. Guide bar; 3. Fixing component; 301. Feed inlet; 302. Collection tank; 31. Grinding tank body; 311. Protruding tooth; 32. Core; 321. Base; 322. Mounting groove; 323. Mounting shaft; 33. Pressure roller; 331. Grinding space; 34. Annular filter plate; 35. Shell; 351. Collection chamber; 36. Negative pressure pneumatic conveying equipment; 4. First drive mechanism; 41. Fixed base; 42. Drive motor A; 43. Main gear; 44. Gear ring; 5. First linkage mechanism; 501. Inner cavity; 51. Central shaft; 52. Gear disc; 53. Driven gear; 6. Jacket layer; 61. Annular mounting space; 62. Electric heating tube; 7. Second drive mechanism; 71. Support frame; 72. Drive motor B; 73. Rotating shaft; 731. Sliding hole; 732. Keyway; 8. Second linkage mechanism; 81. Bracket; 82. Extrusion wheel; 83. End plate; 84. Arc-shaped extrusion protrusion. Detailed Implementation

[0019] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0021] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0022] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Example 1

[0024] Please see Figures 1-13This embodiment provides a roller pressing raw material grinding equipment for potassium nitrate production, including a base 1 and a side frame 2 fixed on one side above the base 1. It also includes a feeding mechanism and a roller pressing mechanism arranged on the side of the side frame 2 and distributed vertically. The feeding mechanism is used to feed the dried raw material into the roller pressing mechanism, and the roller pressing mechanism can be used to grind and crush the dried raw material. Example 2

[0025] Please see Figures 2-8 This utility model provides a roller pressing mechanism for a potassium nitrate raw material grinding equipment, which is applied in the grinding equipment described in Embodiment 1. The roller pressing mechanism includes a grinding tank 31, a core 32, a pressure roller 33, an annular filter plate 34, and a first driving mechanism 4. The grinding tank 31 is fixed to the side of the side frame 2 by a fixing member 3. The core 32 is coaxially arranged inside the grinding tank 31, and the top end of the core 32 is rotatably connected to the top wall of the grinding tank 31, while the bottom end extends to the bottom of the grinding tank 31. The first driving mechanism 4 is located on the side of the side frame 2. Through the operation of the first driving mechanism 4, the core 32 can be driven to rotate, providing drive for the grinding action.

[0026] The outer peripheral wall of the core 32 has several mounting grooves 322 evenly distributed, and mounting shafts 323 are rotatably mounted in each mounting groove 322. Each mounting shaft 323 is fixedly fitted with a pressure roller 33, which is used to crush the raw materials. The inner wall of the grinding tank 31 has several protruding teeth 311 evenly distributed, and each protruding tooth 311 extends vertically for crushing the raw materials. Figure 6 As shown, grinding spaces 331 are formed between the outer wall of the core 32 and the inner wall of the grinding tank 31, as well as between two adjacent pressure rollers 33.

[0027] An annular filter plate 34 is installed at the bottom of the grinding tank 31 and is rotatably connected to the outer wall of the core 32. The first drive mechanism 4 is located on the side of the side frame 2 and is used to drive the core 32 to rotate. The top of the grinding tank 31 has a feed inlet 301. A collection tank 302 connected to the feed inlet 301 is fixed on the top of the grinding tank 31. The collection tank 302 is used to temporarily store the dried raw materials. In one rotation cycle of the core 32, the feed inlet 301 can be connected to each grinding space 331 in sequence to achieve uniform feeding of raw materials.

[0028] The top of the core 32 is flush with the top of the pressure roller 33 and is in contact with the inner top wall of the grinding tank 31 to prevent material jamming due to excessive gaps between the inner top wall of the grinding tank 31 and the top of the core 32 and the pressure roller 33. The bottom of the pressure roller 33 is in contact with the upper surface of the annular filter plate 34, and the bottom of each tooth 311 is fixed to the upper surface of the annular filter plate 34 to ensure that the raw materials in the grinding space 331 are thoroughly crushed and to prevent any omissions.

[0029] The specific working principle of this roller pressing mechanism for grinding raw materials is as follows: The raw materials are fed into the feeding mechanism, which heats them and then feeds them into the inlet 301. As the first driving mechanism 4 drives the column core 32 and drives the pressure roller 33 to rotate in the grinding tank 31, the position of the grinding space 331 changes continuously around the axis of the column core 32. During the rotation, the position of the inlet 301 corresponds to the position of each grinding space 331 in sequence, thereby ensuring that the raw materials can fall into each grinding space 331 in sequence, achieving uniform feeding of the raw materials. The grinding space 331 is used to store raw materials in sections. At the same time, as the core 32 rotates, the raw materials can move synchronously, which can prevent the raw materials from accumulating in one place and causing blockage. As the first drive mechanism 4 drives the core 32 to rotate, the raw material that enters the grinding space 331 is crushed by the pressure roller 33. While the pressure roller 33 crushes the raw material, it cooperates with the convex teeth 311 to achieve a crushing effect. The crushed raw material is reduced in volume to small powder particles and falls to the bottom of the grinding space 331 due to gravity. Finally, it is discharged through the filter holes on the annular filter plate 34. Particles that do not meet the discharge particle size are intercepted in the grinding space 331 and continue to be ground. The pressure roller 33 and the convex teeth 311 work together, combined with the rotational change of the position of the grinding space 331, to produce a pressure crushing effect on the raw material. This mechanism ensures more thorough crushing of the raw material and higher efficiency. Example 3

[0030] Please see Figure 2 , Figure 3 , Figure 7 and Figure 8 This embodiment is used to further explain the first driving mechanism 4 in embodiment 2, as follows: The first drive mechanism 4 includes a drive motor A42, a main gear 43, and a gear ring 44. The bottom end of the core 32 has a base 321, and the core 32 and the base 321 are integrally formed. The gear ring 44 is fixedly fitted on the outer wall of the base 321. The side frame 2 has a fixed seat 41 fixed on its side. The drive motor A42 is fixed on the fixed seat 41. The main gear 43 is fixed on the output shaft of the drive motor A42 and meshes with the gear ring 44. When the drive motor A42 works, its output shaft can drive the main gear 43 to rotate. The rotating main gear 43 can mesh with the drive gear ring 44 and drive the core 32 to rotate, providing effective drive for the rotary grinding action.

[0031] In addition, a first linkage mechanism 5 is provided in the inner cavity 501 opened in the base 321. The first linkage mechanism 5 is used to link each base 321 to rotate synchronously when the core 32 rotates. Specifically, the first linkage mechanism 5 includes a gear 52 and a driven gear 53. The bottom end of the mounting shaft 323 extends into the inner cavity 501 and is fixed with a driven gear 53. A central shaft 51 is fixed at the top of the grinding tank 31. The central shaft 51 passes through the core 32 and extends into the inner cavity 501. The central shaft 51 is rotatably connected to the core 32. The gear 52 is fixed on the end of the central shaft 51 located in the inner cavity 501. The gear 52 meshes with each driven gear 53.

[0032] When the core 32 and the pressure roller 33 rotate around the axis of the core 32, since the central shaft 51 and the gear disk 52 are fixed to the grinding tank 31, they can move relative to the driven gear 53. Under the meshing transmission action of the gear disk 52 and each driven gear 53, the gear disk 52 can drive the overall structure composed of the driven gear 53, the mounting shaft 323 and the pressure roller 33 to rotate in the opposite direction. This allows the pressure roller 33 to rotate on its own axis while revolving around the axis of the core 32.

[0033] The rotation mechanism of the pressure roller 33 is driven by the linkage of the first linkage mechanism 5 when the core 32 rotates, which eliminates the need for additional drive and reduces drive cost.

[0034] The self-rotation mechanism of the pressure roller 33, on the one hand, continuously forms a dynamic area on both sides of the grinding space 331, which moves in coordination with the outer wall of the core 32 and the protruding teeth 311, which can intensify the tumbling of the raw material in the grinding space 331, which is beneficial to dynamic grinding and can also reduce clogging. On the other hand, the self-rotation of the pressure roller 33 can apply a rotary cutting force to the raw material, further improving the grinding effect of the raw material.

[0035] In addition, such as Figure 5 and Figure 6 As shown, each pressure roller 33 fits snugly against the inner wall of the corresponding mounting groove 322. When the pressure roller 33 rotates, it ensures that the raw material adhering to the outer wall of the pressure roller 33 can be scraped off at the edge of the mounting groove 322, while also preventing the raw material from leaking into the mounting groove 322. Example 4

[0036] Please see Figure 3 and Figure 4As a preferred embodiment, an L-shaped shell 35 is fixed to the bottom of the grinding tank 31. The shell 35 is rotatably connected to the outer wall of the core 32. An annular collection cavity 351 is formed between the shell 35, the lower surface of the annular filter plate 34, and the outer wall of the core 32. The discharge port on the shell 35, which communicates with the collection cavity 351, is connected to the negative pressure pneumatic conveying device 36. The negative pressure pneumatic conveying device 36 adopts existing technology. Therefore, the negative pressure pneumatic conveying device 36 in the accompanying drawings of this application is a simplified representation. By setting the shell 35, the powder discharged from the filter holes on the annular filter plate 34 can be collected in the collection cavity 351. By operating the negative pressure pneumatic conveying device 36, the powder can be suctioned under negative pressure and conveyed to the downstream process. Example 5

[0037] Please see Figure 1 , Figure 3 and Figures 9-13 This embodiment is used to further explain the feeding mechanism in Embodiment 1, as follows: The feeding mechanism includes a heating tank 21, a shaft 23, an annular guide plate 24, and a second guide plate 25. The heating tank 21 is fixed to the side of the side frame 2 by a fixing member 3. The heating tank 21 is equipped with a feeding hopper 22 and a heating system, specifically including a jacket layer 6 and electric heating tubes 62. The jacket layer 6 is located on the outer wall of the heating tank 21 and forms an annular installation space 61 between it and the outer wall of the heating tank 21. Several electric heating tubes 62 are arranged in an array around the heating tank 21 in the annular installation space 61. Each electric heating tube 62 extends vertically. Raw materials are fed from the top of the feeding hopper 22 and fall into the heating tank 21. At the same time, the electric heating tubes 62 are powered on and generate heat, which is transferred to the heating tank 21 to heat and dry the raw materials in the heating tank 21, reduce the moisture content of the raw materials, and thus reduce the agglomeration and adhesion of the raw materials, further improving the raw material crushing effect.

[0038] The shaft 23 is vertically arranged inside the heating tank 21 and the feeding hopper 22, with its bottom end extending to the bottom of the heating tank 21. A second drive mechanism 7 is provided above the feeding hopper 22 to drive the shaft 23 to rotate. Several annular guide plates 24 are fixed at intervals from top to bottom on the inner wall of the heating tank 21. On the outer wall of the shaft 23, a second guide plate 25 is fixed below each annular guide plate 24. Both the annular guide plate 24 and the second guide plate 25 are concave discs. A material drop opening is formed between the outer wall of the shaft 23 and the inner edge wall of each annular guide plate 24. The maximum diameter of the second guide plate 25 is smaller than the inner diameter of the heating tank 21, so that there is a material drop gap between the outer edge of the second guide plate 25 and the inner wall of the heating tank 21.

[0039] like Figure 12As shown, the raw material first falls onto the uppermost annular guide plate 24, and then slides down the upper surface of the annular guide plate 24 towards the center, finally landing on the lower second guide plate 25. As the second drive mechanism 7 drives the shaft 23 and drives the second guide plate 25 to rotate, centrifugal force is generated, which can fling the raw material on the second guide plate 25 to the outside and impact it on the inner wall of the heating tank 21, breaking up any clumps of raw material, making it easier to crush later. The broken raw material falls onto the next annular guide plate 24, and so on, so that the raw material undergoes multiple flings and impacts in the heating tank 21. At the same time, the residence time of the raw material in the heating tank 21 is extended, ensuring more thorough drying.

[0040] The bottom of the heating tank 21 extends into the collection tank 302, and the two are sealed together. Finally, the dried raw material falls into the collection tank 302 through the bottom of the heating tank 21, and is then fed into the grinding space 331 through the feed inlet 301.

[0041] By sealing and connecting the bottom of the heating tank 21 and the feed inlet 301 through the collection tank 302, combined with the negative pressure suction effect of the negative pressure pneumatic conveying device 36, an airflow can be formed in the equipment, passing through the feeding hopper 22, heating tank 21, collection tank 302, feed inlet 301, grinding space 331 and shell 35. On the one hand, it can remove the dust generated in the equipment. On the other hand, when the raw materials are fed into the feeding hopper 22, it can prevent the dust from overflowing from the top port of the feeding hopper 22. This not only improves the collection effect of raw materials, but also reduces the risk of dust pollution and explosion, achieving two goals at once.

[0042] Secondly, a second linkage mechanism 8 is provided at the bottom of the heating tank 21 and inside the collection tank 302. This mechanism is used to push the shaft 23 upward when the shaft 23 rotates. When the shaft 23 moves upward, it can drive the annular guide plate 24 to move upward synchronously. At this time, the distance between the second guide plate 25 and the upper annular guide plate 24 gradually decreases. By utilizing the cooperation between the annular guide plate 24 and the second guide plate 25, the raw materials remaining on the second guide plate 25 can be pre-crushed, which further facilitates subsequent grinding and pulverization. Example 6

[0043] Please see Figure 10 This embodiment is used to further explain the second drive mechanism 7 in embodiment 5, as follows: Specifically, the second drive mechanism 7 includes a drive motor B72 and a rotating shaft 73. A support frame 71 is fixed on the outer wall of the jacket layer 6, extending above the feeding hopper 22. The drive motor B72 is installed at the top of the support frame 71. The top of the rotating shaft 73 is fixedly connected to the output shaft of the drive motor B72. The bottom of the rotating shaft 73 is provided with a vertically upward extending sliding hole 731. A vertically extending keyway 732 is provided on the inner wall of the sliding hole 731. The top of the shaft 23 is slidably inserted into the sliding hole 731, and a positioning key block 231 is fixed on the outer wall of the shaft 23. The positioning key block 231 is slidably and limitedly locked in the keyway 732. When the drive motor B72 works, its output shaft can drive the rotating shaft 73 to rotate. Under the limiting action of the positioning key block 231 and the keyway 732, the rotating shaft 73 can drive the shaft 23 to rotate, thereby providing effective drive for the rotation of the shaft 23. Furthermore, by sliding the top of the shaft 23 into the sliding hole 731 and by sliding the positioning key block 231 into the keyway 732, the shaft 23 and the rotating shaft 73 have the ability to move relative to each other in the axial direction, thereby ensuring that the shaft 23 has the ability to rise and fall while rotating with the shaft 23. Example 7

[0044] Please see Figure 13 This embodiment is used to further explain the second linkage mechanism 8 in embodiment 5, as follows: The second linkage mechanism 8 includes an extrusion wheel 82, an end plate 83, and an arc-shaped extrusion protrusion 84. A bracket 81 is fixed to the bottom side of the heating tank 21. The extrusion wheel 82 is rotatably mounted on the bracket 81. An end plate 83 is fixed to the bottom of the shaft 23. The lower surface of the end plate 83 abuts against the extrusion wheel 82. When the shaft 23 descends and resets to its limit position, the extrusion wheel 82 abuts against the lower surface of the end plate 83, and the positioning key block 231 abuts against the inner bottom wall of the keyway 732, providing effective support for the shaft 23 and the second guide plate 25 as a whole, ensuring the stability of the shaft 23's rotation. An arc-shaped extrusion protrusion 84 is fixed to the lower surface of the end plate 83, and the arc-shaped extrusion protrusion 84 is in a pressing fit with the extrusion wheel 82.

[0045] The end plate 83 and the arc-shaped extrusion protrusion 84 can rotate synchronously with the shaft 23. During one rotation of the shaft 23, the arc-shaped extrusion protrusion 84 can complete one extrusion engagement with the extrusion wheel 82. When the arc-shaped extrusion protrusion 84 and the extrusion wheel 82 are extruded, the extrusion wheel 82 can push the arc-shaped extrusion protrusion 84 and the shaft 23 upward. After the arc-shaped extrusion protrusion 84 separates from the extrusion wheel 82, the shaft 23 can return to its original position under the action of gravity. This allows the shaft 23 and the second guide plate 25 to complete one lifting and lowering movement within one rotation cycle. It is worth noting that the arc-shaped extrusion protrusion 84 has arc-shaped slopes on both sides, and the extrusion is done with the extrusion wheel 82 in an arc-shaped extrusion, ensuring that the extrusion and pushing process is smooth enough.

[0046] The extrusion roller 82 and the arc-shaped extrusion protrusion 84 work together to push and push, providing a drive for the upward movement of the shaft 23. No additional drive is required, reducing the investment in drive costs.

[0047] In addition, a first guide plate 221 in the shape of a concave disc is fixed on the inner wall of the feeding hopper 22. There is a feeding gap between the first guide plate 221 and the shaft 23. A sealing plate 222 is fixed on the shaft 23 below the first guide plate 221. When the shaft 23 moves to the limit position, the sealing plate 222 is attached to the bottom of the first guide plate 221, and the end plate 83 is attached to the bottom of the heating tank 21, thus achieving sealing. In this way, two intermittent feeding mechanisms are formed to avoid excessive blockage caused by continuous feeding of raw materials into the heating tank 21 or the grinding space 331. Example 8

[0048] Please see Figure 12 As a preferred embodiment of Example 5, a number of guide strips 251 are fixed in a circular array around the shaft 23 on the upper surface of the second guide plate 25. Each guide strip 251 extends radially along the second guide plate 25. By arranging a number of guide strips 251 on the second guide plate 25, the raw material can be directionally guided to fly away. At the same time, the raw material can be intercepted at multiple positions to enhance the synchronization of the movement between the raw material and the second guide plate 25, avoid slippage, and reduce the amount of raw material residue on the second guide plate 25.

[0049] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. A roller pressing mechanism for a potassium nitrate raw material grinding equipment, comprising a base (1) and a side frame (2) fixed above one side of the base (1), characterized in that: It also includes a grinding tank (31), a core (32), a pressure roller (33), an annular filter plate (34), and a first drive mechanism (4); The grinding jar (31) is fixed to the side of the side frame (2) by a fastener (3), and the top of the core (32) is rotatably installed on the inner top wall of the grinding jar (31), and the bottom extends to the bottom of the grinding jar (31). The grinding tank (31) has several vertically extending protruding teeth (311) evenly distributed on its inner wall, and several pressure rollers (33) are intermittently embedded on the outer peripheral wall of the core (32). Grinding spaces (331) are formed between the outer wall of the core (32) and the inner wall of the grinding tank (31) and between two adjacent pressure rollers (33). The annular filter plate (34) is installed at the bottom of the grinding tank (31) and is rotatably connected to the outer wall of the core (32). The first driving mechanism (4) is located on the side of the side frame (2) and is used to drive the core (32) to rotate.

2. The roller pressing mechanism for a potassium nitrate raw material grinding equipment according to claim 1, characterized in that: The outer peripheral wall of the core (32) is evenly distributed with a number of mounting grooves (322), and a mounting shaft (323) is rotatably mounted in each mounting groove (322). The pressure rollers (33) are fixedly mounted on the mounting shaft (323) one by one, and are in movable contact with the inner wall of the mounting groove (322); The top of the core (32) is flush with the top of the pressure roller (33) and both are in contact with the inner top wall of the grinding tank (31). The bottom ends of the pressure rollers (33) are in contact with the upper surface of the annular filter plate (34).

3. The roller pressing mechanism for a potassium nitrate raw material grinding equipment according to claim 2, characterized in that: The first drive mechanism (4) includes a drive motor A (42), a main gear (43), and a gear ring (44). The bottom end of the core (32) has a base (321), and the toothed ring (44) is fixedly fitted on the outer wall of the base (321); The side frame (2) is fixed with a fixed seat (41), and the drive motor A (42) is fixed on the fixed seat (41); The main gear (43) is fixed on the output shaft of the drive motor A (42) and meshes with the gear ring (44); The base (321) is provided with a first linkage mechanism (5) for synchronously rotating each of the bases (321) when the column core (32) rotates.

4. The roller pressing mechanism for a potassium nitrate raw material grinding equipment according to claim 3, characterized in that: The first linkage mechanism (5) includes a gear plate (52) and a driven gear (53); The base (321) has an inner cavity (501), and the bottom ends of the mounting shafts (323) all extend into the inner cavity (501) and are all fixed with the driven gears (53). The grinding tank (31) has a central shaft (51) fixed at the top. The central shaft (51) passes through the core (32) and extends to the inner cavity (501). The central shaft (51) is rotatably connected to the core (32). The toothed disc (52) is fixed on the end of the central shaft (51) located inside the inner cavity (501); The gear disc (52) meshes with each of the driven gears (53).

5. The roller pressing mechanism for a potassium nitrate raw material grinding equipment according to claim 1, characterized in that: The bottom of the grinding tank (31) is fixed with a shell (35) with an L-shaped cross section, and the shell (35) is rotatably connected to the outer wall of the core (32). An annular collection chamber (351) is formed between the lower surface of the shell (35), the annular filter plate (34), and the outer wall of the core (32). The discharge port on the shell (35) that communicates with the collection chamber (351) is connected to the negative pressure pneumatic conveying device (36).

6. The roller pressing mechanism for a potassium nitrate raw material grinding equipment according to claim 1, characterized in that: The grinding tank (31) has a feed inlet (301) at the top for the raw materials to fall into the grinding space (331). The grinding tank (31) is fixed with a collection tank (302) on top, and the collection tank (302) is connected to the feed inlet (301).

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