A device for the production of a cementitious material

Abstract

The application discloses a kind of preparation devices of cementitious material, it is related to cementitious material preparation technical field, including the main body with grinding cavity, grinding disc and drive mechanism are arranged in the main body;Grinding passageway and pre-treatment passageway are formed between the outer wall of grinding disc and the inner wall of grinding cavity, the pre-treatment passageway is in the upstream of grinding passageway and width is greater than grinding passageway, the pre-treatment passageway is inclined to the axial direction of grinding disc;The drive mechanism is used to drive grinding disc to reciprocate along its axial direction while driving grinding disc to rotate.The preparation device of cementitious material provided in the application makes material first enter pre-treatment passageway before entering grinding passageway, to crush and initially grind material in pre-treatment passageway, to increase the particle size range of material that grinding mechanism can grind, to process material with larger particle size.

Description

Technical Field

[0001] This invention relates to the field of cementitious material preparation technology, and more specifically to a cementitious material preparation apparatus. Background Technology

[0002] Cementitious materials are materials with adhesive properties, mainly used in the production of building materials such as concrete, mortar, and limestone. Common cementitious materials include cement, lime, and gypsum. These materials undergo a chemical reaction in the presence of water, generating adhesive forces that enable the building materials to form a strong structure.

[0003] There are various methods for preparing cementitious materials. For example, the patent document with authorization announcement number CN109734403B and authorization announcement date of November 26, 2021, entitled "A Preparation Method of Tuff Cementitious Material", includes the following steps: crushing, grinding, and sieving tuff to obtain tuff powder; crushing, grinding, and sieving carbide slag to obtain carbide slag powder; mixing tuff powder, carbide slag powder, and sodium hydroxide powder and activating at high temperature; and mixing alkali-activated tuff mixed powder, phosphogypsum powder, and diatomaceous earth and ball milling to obtain tuff cementitious material.

[0004] Cementitious materials require multiple grinding processes during preparation. Existing grinding mechanisms can only grind materials with particle sizes smaller than the width of the grinding channel, while materials with larger particle sizes cannot enter the grinding channel. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus for preparing cementitious materials to overcome the above-mentioned shortcomings in the prior art.

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

[0007] An apparatus for preparing a gelling material includes a main body having a grinding chamber, wherein the main body is provided with:

[0008] A grinding disc, wherein a grinding channel and a pretreatment channel are formed between the outer wall of the grinding disc and the inner wall of the grinding chamber, the pretreatment channel is located upstream of the grinding channel and its width is greater than that of the grinding channel, and the pretreatment channel is inclined to the axial direction of the grinding disc;

[0009] The drive mechanism is used to drive the grinding disc to rotate while simultaneously moving the grinding disc back and forth along its axial direction.

[0010] The above-mentioned apparatus for preparing a gelling material includes a grinding channel comprising an interconnected feeding section, a grinding section, and a discharging section, wherein the lengths of the feeding section and the discharging section are both greater than the stroke length of the grinding disc moving axially.

[0011] In the aforementioned apparatus for preparing a gelling material, the width of the pretreatment channel gradually decreases in the material movement direction.

[0012] The above-mentioned apparatus for preparing a gelling material includes a grinding disc comprising a cylindrical portion for forming a grinding channel and a frustum portion for forming a pretreatment channel.

[0013] The above-mentioned apparatus for preparing a gelling material includes a driving mechanism comprising a driving shaft rotatably connected within a main body, a driving groove adapted to the driving shaft on the grinding disc, a movable groove on the main body, and a rotating shaft fixed on the grinding disc, the rotating shaft being movably disposed within the movable groove.

[0014] The aforementioned apparatus for preparing a gelling material further includes a drive mechanism that includes an abutment portion fixed to the bottom of a grinding disc. The main body has a corrugated groove, and the abutment portion is slidably disposed within the corrugated groove.

[0015] In the above-mentioned apparatus for preparing a gelling material, a baffle plate is fixed on the top of the main body, and a plurality of feed holes are constructed on the baffle plate. A rotating ring is rotatably connected to the main body, and a plurality of feeding plates corresponding to the feed holes are fixed on the rotating ring.

[0016] The above-mentioned apparatus for preparing a gelling material includes a drive wheel fixed to the outer wall of the rotating shaft, a transmission inner wheel fixed to the inner wall of the rotating ring, and a linkage wheel. The linkage wheel is equipped with a first transmission part that is connected to the drive wheel and a second transmission part that is connected to the transmission inner wheel.

[0017] The above-mentioned apparatus for preparing a gelling material includes a movable column fixed on the main body, a movable block slidably connected to the movable column, a linkage wheel rotatably connected to the movable block, an elastic element hinged to the main body, the other end of the elastic element hinged to the movable block, an abutment groove provided on the top of the grinding disc, and a protruding column constructed on the elastic element.

[0018] In the aforementioned apparatus for preparing a gelling material, a locking rod is fixed on the movable block, and a locking groove is constructed on the rotating ring.

[0019] In the above technical solution, the present invention provides a preparation device for a gelling material. Through the sequential arrangement of grinding channels and pretreatment channels, the material enters the pretreatment channel before entering the grinding channel. When the driving mechanism drives the grinding disc to rotate, the material in the grinding channel and the pretreatment channel is ground to different degrees. When the driving mechanism simultaneously drives the grinding disc to move back and forth along its axial direction, the width of the grinding channel remains unchanged, and the material inside it is ground normally. However, the width of the pretreatment channel will decrease to compress the material inside it. In this way, the material in the pretreatment channel can be crushed and initially ground, thereby increasing the particle size range of the material that the grinding mechanism can grind, so as to process materials with larger particle sizes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a grinding channel structure provided in another embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a grinding disc structure provided in another embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a material feeding plate structure provided in another embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a drive wheel structure provided in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure when the linkage wheel is at the bottom of the movable column according to another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure when the linkage wheel is at the top end of the movable column according to another embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a linkage wheel structure is provided in another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of a locking groove structure provided in another embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Grinding chamber; 2. Main body; 3. Grinding disc; 31. Cylindrical part; 32. Frustum part; 4. Grinding channel; 41. Feeding section; 42. Grinding section; 43. Discharge section; 5. Pre-treatment channel; 6. Drive shaft; 7. Rotating shaft; 8. Connecting column; 9. Abutting part; 10. Wave groove; 11. Baffle plate; 12. Feed hole; 13. Rotating ring; 14. Pushing plate; 15. Drive wheel; 16. Inner transmission wheel; 17. Linkage wheel; 171. First transmission part; 172. Second transmission part; 18. Movable column; 19. Movable block; 20. Elastic element; 21. Abutting groove; 22. Protruding column; 23. Extension part; 24. Connecting part; 25. Locking rod; 26. Locking groove; 27. Sealing part. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1-9 This invention provides a preparation apparatus for a gelling material, comprising a main body 2 having a grinding chamber 1, wherein a grinding disc 3 and a driving mechanism are disposed within the main body 2; a grinding channel 4 and a pretreatment channel 5 are formed between the outer wall of the grinding disc 3 and the inner wall of the grinding chamber 1, wherein the axial direction of the grinding channel 4 is arranged along the axial direction of the grinding disc 3, and the pretreatment channel 5 is located upstream of the grinding channel 4 and has a width greater than the grinding channel 4, and the pretreatment channel 5 is inclined to the axial direction of the grinding disc 3; the driving mechanism is used to drive the grinding disc 3 to rotate while simultaneously driving the grinding disc 3 to reciprocate along its axial direction.

[0034] Specifically, common cementitious materials include steel slag, mineral slag, cement, lime, and gypsum. These materials require mixing, acidification, drying, and grinding processes during preparation. In the grinding process, different grinding mechanisms can be selected based on the material's properties. Grinding mechanisms generally have grinding channels, and the two sidewalls of the grinding channel can move relative to each other, typically rotating, to grind the material through the rough structure of the sidewalls. This is existing technology and will not be elaborated further. The innovation of this embodiment lies in setting a pretreatment channel 5 upstream of the grinding channel 4 (in the grinding chamber, the material flows from top to bottom, and the pretreatment channel 5 is upstream of the grinding channel 4, meaning it is above the grinding channel 4; the material passes through the pretreatment channel 5 first and then the grinding channel 4). The grinding channel 4 and the pretreatment channel 5 have different widths and are set at different angles. The driving mechanism drives the grinding disc 3 to rotate while simultaneously moving it axially (the driving mechanism can be a combination of a motor and an electric push rod, so that while the motor drives the grinding disc 3 to rotate...). Then, the electric push rod drives the motor and the grinding disc 3 to move back and forth. Since the axial direction of the grinding channel 4 is set along the axial direction of the grinding disc 3, the width of the grinding channel 4 remains unchanged when the grinding disc 3 moves axially to continuously grind the material. The width of the pretreatment channel 5 will change with the movement of the grinding disc 3, so that large particles can enter the pretreatment channel 5 and be pre-compressed. In this way, the material in the pretreatment channel 5 can be crushed and pre-ground, thereby increasing the particle size range of the material that the grinding mechanism can grind, so as to process materials with larger particle sizes.

[0035] This invention provides a preparation apparatus for a gelling material. Through a grinding channel 4 and a pretreatment channel 5 arranged sequentially, the material enters the pretreatment channel 5 before entering the grinding channel 4. When the driving mechanism rotates the grinding disc 3, the materials in the grinding channel 4 and the pretreatment channel 5 are ground to different degrees. Simultaneously, when the driving mechanism moves the grinding disc 3 back and forth along its axial direction, the width of the grinding channel 4 remains unchanged, and the material inside is ground normally. Meanwhile, the width of the pretreatment channel 5 decreases to compress the material inside. This allows for the crushing and preliminary grinding of the material in the pretreatment channel 5, thereby increasing the particle size range that the grinding mechanism can grind, and enabling the processing of materials with larger particle sizes.

[0036] In another embodiment of the present invention, the grinding channel 4 further includes an interconnected feeding section 41, a grinding section 42, and a discharging section 43, the lengths of which are both greater than the axial travel length of the grinding disc 3. Specifically, in the material movement direction, the width of the grinding section 42 gradually decreases, the width of the entire feeding section 41 remains consistent and is connected to the grinding section 42, and the width of the entire discharging section 43 remains consistent and is connected to the grinding section 42. The purpose of this arrangement is that when the grinding disc 3 moves along its axial direction, the outer wall of the grinding disc 3 moves relative to the inner wall of the grinding chamber 1 (that is, the two side walls of the grinding channel 4 move relative to each other). Since the lengths of the feeding section 41 and the discharging section 43 are both greater than the stroke length of the axial movement of the grinding disc 3, the feeding section 41 and the discharging end on the outer wall of the grinding disc 3 and the inner wall of the grinding chamber 1 will not be completely misaligned. This allows the feeding section 41 to maintain a certain width to prevent larger particles from entering the grinding channel 4, and to ensure that the materials entering the feeding section 41 are smaller than or equal to the width of the feeding section 41, so that the materials can be gradually and finely ground through the entire grinding channel 4.

[0037] Preferably, the width of the pretreatment channel 5 gradually decreases in the material movement direction. Specifically, during the axial movement of the grinding disc 3, the width of the pretreatment channel 5 near the grinding channel 4 is always greater than or equal to the width of the feed section 41. In this way, the material can be pretreated gradually through the pretreatment channel 5 (extrusion and preliminary grinding to reduce the particle size of the material), so as to increase the range of material grinding particle size while ensuring the fineness and uniformity of grinding as much as possible.

[0038] In another embodiment of the present invention, the grinding disc 3 further includes a cylindrical portion 31 for forming a grinding channel 4 and a frustum portion 32 for forming a pretreatment channel 5. Specifically, the inner wall of the grinding cavity 1 is correspondingly arranged with the outer wall of the grinding disc 3. The outer wall of the cylindrical portion 31 is arranged along the axial direction of the grinding disc 3, while the outer wall of the frustum portion 32 is inclined with respect to the axial direction of the grinding disc 3. The inner wall of the corresponding part of the grinding cavity 1 is also inclined, but the inclination angle is smaller than that of the frustum portion 32, so that a grinding channel 4 is formed between the cylindrical portion 31 and the inner wall of the grinding cavity 1, and a pretreatment channel 5 is formed between the frustum portion 32 and the inner wall of the grinding cavity 1. Both the outer wall of the grinding disc 3 and the inner wall of the grinding cavity 1 are constructed with a rough structure, so as to grind the material when the grinding disc 3 rotates.

[0039] Preferably, the driving mechanism includes a driving shaft 6 rotatably connected within the main body 2, a driving groove adapted to the driving shaft 6 is constructed on the grinding disc 3, a movable groove is constructed on the main body 2, and a rotating shaft 7 is fixed on the grinding disc 3, the rotating shaft 7 being movably disposed within the movable groove. Specifically, a connecting column 8 is fixed to the bottom wall of the grinding chamber 1, and the drive shaft 6 is rotatably connected to the connecting column 8. A power chamber is constructed inside the connecting column 8, and a power source (such as a geared motor, which is prior art and not shown) is provided in the power chamber to drive the drive shaft 6 to rotate. Both the drive shaft 6 and the rotating shaft 7 are arranged along the axial direction of the grinding disc 3. The drive shaft 6 is constructed as a non-rotating body, such as a polygonal prism or spline structure. The drive shaft 6 is located in the drive groove and the two can move relative to each other (the grinding disc 3 can be driven to reciprocate along the axial direction of the drive groove by an electric push rod). The rotating shaft 7 and the movable groove are adapted to each other, and the rotating shaft 7 can rotate in the movable groove and move axially synchronously. This can adapt to the operation of the grinding disc 3 so that the grinding disc 3 moves along the drive shaft 6 and the movable groove while rotating (that is, moves along the axial direction of the grinding disc 3).

[0040] As an alternative to the aforementioned axial movement drive method of the grinding disc 3, the drive mechanism further includes an abutment part 9 fixed to the bottom of the grinding disc 3. A wave groove 10 is constructed within the main body 2, and the abutment part 9 is slidably disposed within the wave groove 10. Specifically, the wave groove 10 is constructed on the outer wall of the connecting column 8 (i.e., within the main body 2). The abutment part 9 is L-shaped, with one end fixed to the bottom wall of the grinding disc 3 and the other end slidably disposed within the wave groove 10. When the abutment part 9 rotates with the grinding disc 3, it is restricted and resisted by the wave groove 10, causing it to move up and down. That is, the inner wall of the wave groove 10 forces the abutment part 9 and the grinding disc 3 to move together along the axial direction of the grinding disc 3. The wave groove 10 includes two evenly distributed crests and two troughs, with the crests and troughs alternating. This allows the grinding disc 3 to be forced to perform two reciprocating axial movements while the drive shaft 6 rotates the grinding disc 3 one revolution. Two abutment parts 9 are symmetrically arranged at the bottom of the grinding disc 3. The two abutment parts 9 are located in the wave groove 10 at the same time. When the grinding disc 3 rotates, the two abutment parts 9 are at two wave crest positions or two wave trough positions respectively, thereby forcing the grinding disc 3 to make stable axial movement.

[0041] In another embodiment of the present invention, a baffle plate 11 is fixed to the top of the main body 2. The baffle plate 11 does not contact the rotating shaft 7. The baffle plate 11 has multiple feed holes 12. A rotating ring 13 is rotatably connected to the main body 2. Multiple feeding plates 14 corresponding to the feed holes 12 are fixed to the rotating ring 13. Specifically, the top of the grinding chamber 1 has an opening for feeding materials. The opening has a circular cross-section. The baffle plate 11 is also circular. The feed holes 12 and feeding plates 14 are both fan-shaped. The feeding plates 14 have protrusions for feeding materials. The rotating ring 13 is annular in shape. Multiple feeding plates 14 are arranged in a ring array on the outer wall of the rotating ring 13. After the material is fed into the grinding chamber 1, it first falls onto the baffle plate 11. The baffle plate 11 can block the material and make it accumulate together. Then, rotating the rotating ring 13 can drive the feeding plates 14 to rotate (which can be set on the main body 2). The structure includes a motor to drive the rotating ring 13 to rotate, which allows the material to be moved by the material-moving plate 14. The advantage of this arrangement is that when multiple materials are fed into the grinding chamber 1, the material-moving plate 14 can pre-mix the multiple materials, so that the materials entering the pretreatment channel 5 through the feed hole 12 are initially mixed materials. The number of feed holes 12 and material-moving plates 14 are corresponding, and both are arranged in a circular array, so that when multiple material-moving plates 14 rotate, they can simultaneously block or open multiple feed holes 12 to synchronously feed materials into multiple feed holes 12.

[0042] As an alternative to the aforementioned motor driving the rotating ring 13, preferably, a drive wheel 15 is fixed to the outer wall of the rotating shaft 7, and a transmission inner wheel 16 is fixed to the inner wall of the rotating ring 13. It also includes a linkage wheel 17, on which a first transmission part 171, which is connected to the drive wheel 15, and a second transmission part 172, which is connected to the transmission inner wheel 16, are constructed. Specifically, the first transmission part 171 is cylindrical and adapted to the drive wheel 15. Gear transmission or friction wheel transmission can be used between the first transmission part 171 and the drive wheel 15. It should be noted that the thickness of the drive wheel 15 is greater than the axial displacement stroke length of the grinding disc 3, so that the drive wheel 15 can always be connected to the first transmission part 171 when the grinding disc 3 moves. The second transmission part 172 and the transmission inner wheel 16 are conical and adapted to each other. Gear transmission or friction wheel transmission can be used between the second transmission part 172 and the transmission inner wheel 16. With this configuration, when the grinding disc 3 and the rotating shaft 7 rotate and move axially, the drive wheel 15 on the outer wall of the rotating shaft 7 can continuously drive the linkage wheel 17 to rotate, thereby driving the transmission inner wheel 16 and the rotating ring 13 to rotate, so that the feeding plate 14 mixes the material and feeds the material into the feed port.

[0043] Furthermore, a movable column 18 is fixed on the main body 2, and a movable block 19 is slidably connected to the movable column 18. The linkage wheel 17 is rotatably connected to the movable block 19. An elastic element 20 is hinged to the main body 2, and the other end of the elastic element 20 is hinged to the movable block 19. The grinding disc 3 has an abutment groove 21 on its top, and the elastic element 20 has a protruding column 22. Specifically, a flared groove is constructed on one side of the opening of the movable groove, and the movable column 18 is fixed in the flared groove (that is, the movable column 18 is fixed on the inner wall of the main body 2). The movable column 18 is a non-rotating body, such as a polygonal prism. The movable block 19 is cylindrical in shape and is sleeved on the movable column 18 to slide stably along the movable column 18. The linkage wheel 17 is rotatably connected to the outer wall of the movable block 19. The elastic element 20 can be an elastic telescopic rod in a compressed state. An extension 23 is constructed on the inner wall of the flared groove, and one end of the elastic element 20... The movable block 19 is hinged to the outer wall of the movable block 19 at one end, and the extension 23 is hinged to the outer wall of the extension 23 at the other end (i.e., it is elastically hinged to the main body 2). Two limiting parts are constructed on the movable column 18 to restrict the position of the movable block 19, allowing the movable block 19 to have a certain sliding stroke on the movable column 18. When the movable block 19 is at one end close to the inner transmission wheel 16, the linkage wheel 17 is simultaneously connected to the drive wheel 15 and the inner transmission wheel 16, at which time the rotating shaft 7 can drive the rotating ring 13 to rotate. When the movable block 19 is at... When the moving block 17 is near the grinding disc 3, it separates from the inner transmission wheel 16. At this time, the rotating shaft 7 cannot drive the rotating ring 13 to rotate. When the moving block 19 is in the middle of its sliding stroke, the elastic element 20 and the moving column 18 are perpendicular to each other. At this time, the elastic element 20 cannot force the moving block 19 to move along the moving column 18. If the position of the moving block 19 shifts upward (or downward), the elastic force of the elastic element 20 can quickly drive the moving block 19 to the upper (or lower) end of its stroke. That is, the position that abuts against the upper limiting part (or lower end); the top of the grinding disc 3 is provided with a connecting part 24, and the abutting groove 21 is constructed on the side of the connecting part 24 near the elastic member 20, and the length of the abutting groove 21 is the same as the axial travel length of the grinding disc 3. The elastic member 20 is located between the connecting part 24 and the extension part 23, and the protruding post 22 is located in the abutting groove 21; when the grinding disc 3 and the rotating shaft 7 move axially, the connecting part 24 moves synchronously and can abut against the protruding post 22 through the inner wall of the abutting groove 21, such as Figure 6As shown, the grinding disc 3 is about to move to the top of its axial stroke. At this time, the bottom wall of the contact groove 21 abuts against the protruding post 22. During the subsequent movement of the grinding disc 3 to the top of its axial stroke, the bottom wall of the contact groove 21 forces the protruding post 22 to move upward, thereby forcing the elastic element 20 to contract and driving the movable block 19 to move upward along the movable post 18. Until the grinding disc 3 moves to the top of its axial stroke, the position of the protruding post 22 is higher than the hinge position between the elastic element 20 and the extension 23, so that the movable block 19 is in the elastic element 20. Under the action of 0, it abuts against the upper limit part, thereby causing the linkage wheel 17 to be simultaneously connected to the drive wheel 15 and the inner transmission wheel 16, so that the rotating ring 13 rotates during the downward movement of the grinding disc 3; conversely, when the grinding disc 3 moves to the bottom of its axial stroke, the top wall of the abutment groove 21 abuts against the protruding column 22 again, thereby forcing the movable block 19 to move to the bottom of the movable column 18, thereby causing the linkage wheel 17 to separate from the inner transmission wheel 16, so that the rotating ring 13 does not rotate during the upward movement of the grinding disc 3.

[0044] The purpose of this arrangement is that when the grinding disc 3 moves upward along its axial direction, it squeezes the material in the pretreatment channel 5. At this time, the pretreatment channel 5 cannot hold more material. The above structure allows the rotating ring 13 to stop rotating during the upward movement of the grinding disc 3, thereby preventing the feeding plate 14 from working continuously while the grinding disc 3 squeezes the material in the pretreatment channel 5. Conversely, when the grinding disc 3 moves downward along its axial direction, the width of the pretreatment channel 5 gradually increases. At this time, the above structure allows the rotating ring 13 to continue rotating, thereby moving the material accumulated on the baffle plate 11 into the pretreatment channel 5. This cycle repeats, allowing the multiple feeding plates 14 on the rotating ring 13 to adapt to the changes in the pretreatment channel 5, so as to feed material into the pretreatment channel 5 at the appropriate time.

[0045] It should be noted that the protruding post 22 is located on the side close to the connecting part 24, so that the abutting groove 21 only needs to drive the protruding post 22 to move a small distance to drive the elastic element 20 and the movable block 19 to switch states (the driving force of the grinding disc 3 is relatively large, and a smaller lever arm can be used to drive the elastic element 20 to contract and rotate). In this way, the time required for the linkage wheel 17 to switch positions is minimized, so that the rotating ring 13 can adapt to the movement of the grinding disc 3 as much as possible to rotate.

[0046] Preferably, when the grinding disc 3 moves to the bottom of its axial travel, the linkage wheel 17 separates from the inner drive wheel 16. At this time, the rotating ring 13 stops rotating, and multiple material-pushing plates 14 block the corresponding feed inlets. Specifically, by setting the transmission ratio between the drive wheel 15, the linkage wheel 17, and the inner drive wheel 16, as well as the number of material-pushing plates 14 and feed holes 12, when the linkage wheel 17 separates from the inner drive wheel 16, the multiple material-pushing plates 14 on the rotating ring 13 can block multiple feed inlets accordingly. This setting allows the material-pushing plates 14 to block the pretreatment channel 5 when they stop rotating, minimizing the material movement out of the pretreatment channel 5 during the extrusion process, thereby improving the extrusion and grinding effect of the material in the pretreatment channel 5.

[0047] Preferably, the center of the baffle plate 11 and the center of the grinding disc 3 are each provided with a corresponding sealing part 27. The two sealing parts 27 are both constructed as annular and fit together. The linkage wheel 17, the inner transmission wheel 16 and the elastic element 20 are all arranged inside the two sealing parts 27, so that when the grinding disc 3 moves axially, the linkage wheel 17 and other structures are in a closed state, so as to avoid the material to be ground from affecting the operation of the above structures. At the same time, the pretreatment channel 5 also extends to the sealing ring position, thereby restricting the space of the pretreatment channel 5 and effectively squeezing the material inside it.

[0048] To prevent the material feeding plate 14 from shifting position when the linkage wheel 17 separates from the transmission inner wheel 16, a locking rod 25 is further fixed on the movable block 19, and a locking groove 26 is constructed on the rotating ring 13. Specifically, the locking rod 25 has a U-shaped overall structure, located on one side of the movable column 18 and above the rotating ring 13. The rotating ring 13 has multiple locking grooves 26. The end of the locking rod 25 away from the movable block 19 is matched with the locking groove 26. When the movable block 19 moves to the bottom of the movable column 18, the linkage wheel 17 separates from the transmission inner wheel 16. At the same time, the locking rod 25 moves downward with the movable block 19 and inserts into the corresponding locking groove 26, thereby locking the position of the rotating ring 13. This continues until the movable block 19 moves to the top of the movable column 18 again, at which point the locking rod 25 disengages from the locking groove 26, allowing the rotating ring 13 to rotate normally. This cycle repeats, allowing the locking rod 25 to be inserted into different locking grooves 26 to lock the position of the rotating ring 13, thus adapting to the operation of the rotating ring 13.

[0049] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An apparatus for preparing a cementitious material, comprising a main body having a grinding chamber, characterized in that, The main body is provided with: A grinding disc, wherein a grinding channel and a pretreatment channel are formed between the outer wall of the grinding disc and the inner wall of the grinding chamber, the pretreatment channel is located upstream of the grinding channel and its width is greater than that of the grinding channel, and the pretreatment channel is inclined to the axial direction of the grinding disc; A drive mechanism is used to drive the grinding disc to rotate while simultaneously moving the grinding disc back and forth along its axial direction. The driving mechanism includes a drive shaft rotatably connected within the main body, a drive groove adapted to the drive shaft is constructed on the grinding disc, a movable groove is constructed on the main body, a rotating shaft is fixed on the grinding disc, and the rotating shaft is movably disposed within the movable groove. A baffle plate is fixed to the top of the main body, and the baffle plate has multiple feed holes. A rotating ring is rotatably connected to the main body, and multiple feeding plates corresponding to the feed holes are fixed on the rotating ring. A drive wheel is fixed to the outer wall of the rotating shaft, and a transmission inner wheel is fixed to the inner wall of the rotating ring. The main body also includes a linkage wheel, which has a first transmission part connected to the drive wheel and a second transmission part connected to the transmission inner wheel. A movable column is fixed to the main body, and a movable block is slidably connected to the movable column. The linkage wheel is rotatably connected to the movable block. An elastic element is hinged to the main body, and the other end of the elastic element is hinged to the movable block. The top of the grinding disc is provided with an abutment groove, and a protruding post is constructed on the elastic element. The length of the abutment groove is the same as the axial travel length of the grinding disc, and the protruding post is located in the abutment groove. When the movable block is at the end close to the inner drive wheel, the linkage wheel is simultaneously connected to the drive wheel and the inner drive wheel, and at this time, the rotating shaft can drive the rotating ring to rotate. When the movable block is at the end close to the grinding disc, the linkage wheel is separated from the inner drive wheel, and at this time, the rotating shaft cannot drive the rotating ring to rotate.

2. The apparatus for preparing a cementitious material according to claim 1, characterized in that, The grinding channel includes an interconnected feeding section, a grinding section, and a discharging section, the lengths of which are both greater than the axial travel length of the grinding disc.

3. The apparatus for preparing a cementitious material according to claim 2, characterized in that, The width of the pretreatment channel gradually decreases in the material movement direction.

4. The apparatus for preparing a cementitious material according to claim 1, characterized in that, The grinding disc includes a cylindrical portion for forming a grinding channel and a frustum portion for forming a pretreatment channel.

5. The apparatus for preparing a cementitious material according to claim 1, characterized in that, The drive mechanism also includes an abutment portion fixed to the bottom of the grinding disc, and the main body has a wave groove, with the abutment portion slidably disposed within the wave groove.

6. The apparatus for preparing a cementitious material according to claim 5, characterized in that, A locking rod is fixed on the movable block, and a locking groove is constructed on the rotating ring.

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