An adjustment device for the gap between the grinding plates of a shredding mill

Abstract

The utility model relates to a kind of adjusting device for the clearance of pulverizing mill grinding disc, comprising: fixedly arranged guide sleeve, the central position of the guide sleeve is equipped with through mounting hole;Bearing sleeve is installed in the mounting hole of the guide sleeve, the guide sleeve is coaxial with bearing sleeve and thread cooperation, so that bearing sleeve can move in axial direction when rotating relative to guide sleeve;Spindle is installed in the central position of bearing sleeve by bearing;Movable grinding disc is installed on spindle;The utility model is improved to the bearing sleeve structure of being able to axial movement by traditional fixed bearing seat, and in combination with the guide cooperation section and threaded connection section of guide sleeve, the accurate adjustment of grinding disc clearance is realized, both the coaxial positioning of spindle and movable grinding disc are guaranteed, and the advantages, such as simple structure, transmission reliable, convenient operation are achieved by manually rotating adjusting handle, bearing sleeve is driven to rotate by driving wheel, synchronous belt and driven wheel, the quick adjustment of grinding disc clearance is realized.

Description

Technical Field

[0001] This application relates to the field of pulverizing mill technology, and in particular to an adjusting device for the gap between pulverizing mill discs. Background Technology

[0002] A pulverizer is an experimental device used for sample pretreatment. This device rapidly and uniformly pulverizes samples to achieve the particle size and uniformity required for testing, thereby ensuring the accuracy and stability of the test results. It is widely applicable to laboratory sample processing of various grains, feeds and other agricultural by-products. Due to its high pulverization efficiency and simple operation, it has become a commonly used pretreatment device in the testing process.

[0003] Existing grinding mills use a pair of precision multi-tooth grinding discs to pulverize samples. In practical applications, to achieve grinding of various particle sizes, it is necessary to have an adjustable gap between the two grinding discs. For example, Chinese utility model patent application number CN202022260353.9 discloses a grinding disc gap adjustment system for a disc pulverizer, which uses a servo motor, lead screw, and other structures to adjust the grinding disc gap. However, this device for adjusting the gap between the two grinding discs suffers from problems such as complex overall structure, high operational difficulty, and high cost. Utility Model Content

[0004] In order to solve the problems of complex structure, inconvenient operation and high cost of adjusting the gap between the two grinding discs in existing pulverizers as mentioned in the background art, this application provides a device for adjusting the gap between the grinding discs of a pulverizer.

[0005] The technical solution of the device for adjusting the gap of a grinding mill disc provided in this application is as follows: An adjusting device for the gap between grinding discs in a pulverizing mill, comprising: A fixed guide sleeve, wherein a through mounting hole is provided at the center of the guide sleeve; A bearing sleeve is installed in the mounting hole of the guide sleeve. The guide sleeve and the bearing sleeve are coaxial and threaded together, so that the bearing sleeve can move in the axial direction when it rotates relative to the guide sleeve. The spindle is mounted at the center of the bearing sleeve via bearings. A movable grinding disc, which is mounted on the main shaft; A rotary drive device, which is connected to the bearing sleeve and is used to drive the bearing sleeve to rotate.

[0006] By adopting the above technical solution, the traditional bearing housing used for mounting the spindle is designed as a movable structure, which can both rotate relative to the guide sleeve and move axially. While ensuring radial positioning of the spindle, it can also achieve axial movement of the movable grinding disc through threaded engagement during rotation, thereby achieving the purpose of adjusting the gap between the two grinding discs. It has the advantages of simple structure and convenient operation.

[0007] Optionally, the inner wall of the guide sleeve is provided with a first guide mating section and an internal thread connection section, the internal thread connection section being located inside the guide sleeve and near the end. The outer wall of the bearing sleeve is provided with a second guide mating section and an external thread connection section, the external thread connection section being located outside the bearing sleeve and near the end. The internal thread connection section and the external thread connection section are threadedly mated, and the first guide mating section and the second guide mating section are in sliding fit.

[0008] By adopting the above technical solution, specifically utilizing the mating structure of the first guide mating section and the second guide mating section, the bearing sleeve is radially positioned, thereby fulfilling the radial positioning requirements of the main shaft and the movable grinding disc, ensuring that the centers of the movable grinding disc, the main shaft, the bearing sleeve, and the guide sleeve remain coaxial. Furthermore, by utilizing the mating relationship between the external threaded connection section and the internal threaded connection section, the bearing sleeve can achieve axial movement when rotating relative to the guide sleeve.

[0009] Optionally, the rotary drive device includes a driven wheel synchronously rotatably connected to the bearing sleeve. An adjusting rod is installed on the frame of the crushing mill. One end of the adjusting rod is connected to a driving wheel. The driving wheel and the driven wheel are connected through a conveyor belt. The other end of the adjusting rod is connected to an adjusting handle. By rotating the adjusting handle, the adjusting rod is rotated, thereby driving the bearing sleeve to rotate using the driving wheel, the conveyor belt, and the driven wheel.

[0010] By adopting the above technical solution, power can be sequentially transmitted to the adjusting rod, the driving wheel, the conveyor belt, and the driven wheel by rotating the adjusting handle, thereby driving the bearing sleeve to rotate and achieving the effect of manually adjusting the gap between the two grinding discs.

[0011] Optionally, both the driving pulley and the driven pulley are synchronous belt pulleys, and the conveyor belt is a synchronous belt.

[0012] By adopting the above technical solution, power transmission is achieved using synchronous pulleys and synchronous belts, which features high transmission efficiency and high precision.

[0013] Optionally, the width of the belt mounting grooves on the drive wheel and driven wheel at the circumferential position is greater than the width of the conveyor belt.

[0014] By adopting the above technical solution, the conveyor belt can move relative to the driving wheel and the driven wheel along its axial direction during the transmission process, and the problem of conveyor belt jamming can be prevented when the driven wheel moves axially together with the bearing sleeve.

[0015] Optionally, it also includes a tensioning assembly for tensioning the conveyor belt, the tensioning assembly including a connecting rod mounted on the crushing mill frame, a position-adjustable tensioning wheel mounted on the connecting rod, the outer wall of the tensioning wheel being in contact with the conveyor belt.

[0016] By adopting the above technical solution, the tensioner can be used to keep the conveyor belt in a suitable tension state at all times, so as to facilitate equipment debugging.

[0017] Optionally, the end of the main shaft is connected to a coupling, which is connected to a motor mounted on the mill frame.

[0018] By adopting the above technical solution, the main shaft is driven to rotate by a motor and coupling, which in turn drives the movable grinding disc to rotate, and works in conjunction with another fixed grinding disc to achieve the grinding effect on the material.

[0019] Optionally, the coupling is a quincunx coupling.

[0020] By adopting the above technical solution, the plum blossom-shaped coupling can allow the main shaft to generate a certain range of axial movement during transmission, realize compensation for axial movement position, and meet the overall power transmission needs of the equipment.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This invention improves the traditional fixed bearing seat into a bearing sleeve structure that can move axially, and combines the guide fitting section and threaded connection section of the guide sleeve to achieve precise adjustment of the grinding disc gap. It not only ensures the coaxial positioning of the main shaft and the movable grinding disc, but also allows for rapid adjustment of the grinding disc gap by manually rotating the adjustment handle, which drives the bearing sleeve to rotate via the drive wheel, synchronous belt and driven wheel. It has the advantages of simple structure, reliable transmission and convenient operation. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention installed on the casing of a crushing mill; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a cross-sectional view of the guide sleeve of this utility model; Figure 5 This is a cross-sectional view of the bearing sleeve of this utility model.

[0023] Explanation of reference numerals in the attached figures: 1. Motor; 2. Coupling; 3. Driven wheel; 4. Guide sleeve; 401. First guide mating section; 402. Internal threaded connection section; 403. Mounting hole; 5. Bearing sleeve; 501. Second guide mating section; 502. External threaded connection section; 6. Main shaft; 7. Adjusting handle; 8. Adjusting rod; 9. Drive wheel; 10. Conveyor belt; 11. Tensioner wheel; 12. Connecting rod; 13. Movable grinding disc; 14. Fixed grinding disc; 15. Frame; 16. Housing. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] This application discloses an adjustment device for the gap between the grinding discs of a pulverizer, wherein the pulverizer mainly includes a frame 15, and the adjustment device is installed on the frame 15.

[0026] Specifically, the adjusting device includes: A guide sleeve 4 is fixedly installed. The guide sleeve 4 has a through mounting hole 403 at its center. The guide sleeve 4 can be directly fixedly installed on the frame 15 by bolts. In this example, a housing 16 for accommodating the fixed grinding disc 14 and the movable grinding disc 13 is installed on the frame 15. The guide sleeve 4 is installed at the end of the housing 16, which also achieves the effect of fixing the guide sleeve 4. The bearing sleeve 5 is installed in the mounting hole 403 of the guide sleeve 4. The guide sleeve 4 and the bearing sleeve 5 are coaxial and threaded together, so that the bearing sleeve 5 can move in the axial direction when it rotates relative to the guide sleeve 4. The main shaft 6 is mounted at the center of the bearing sleeve 5 via a bearing. The movable grinding disc 13 is mounted on the main shaft 6. In this example, the fixed grinding disc 14 that cooperates with the movable grinding disc 13 is installed in the housing 16 and is always in a fixed state. Teeth are provided on the opposing surfaces of the movable grinding disc 13 and the fixed grinding disc 14. After the material moves between the two grinding discs, it can be ground during the rotation of the movable grinding disc 13. When the distance between the two grinding discs is adjusted, the distance can be adjusted by simply moving the movable grinding disc 13 axially relative to the fixed grinding disc 14. A rotary drive device is connected to the bearing sleeve 5 and is used to drive the bearing sleeve 5 to rotate.

[0027] Specifically, the inner wall of the guide sleeve 4 is provided with a first guide mating section 401 and an internal threaded connection section 402. The internal threaded connection section 402 is located inside the guide sleeve 4 and near the end. The outer wall of the bearing sleeve 5 is provided with a second guide mating section 501 and an external threaded connection section 502. The external threaded connection section 502 is located outside the bearing sleeve 5 and near the end. The internal threaded connection section 402 and the external threaded connection section 502 are threadedly engaged. The first guide mating section 401 and the second guide mating section 501 are in sliding engagement. The sliding engagement of the first guide mating section 401 and the second guide mating section 501 is used to radially position the bearing sleeve 5 using the guide sleeve 4, making the guide sleeve 4 and the bearing sleeve 5 coaxial. More specifically, it is to ensure that the centerline of the bearing sleeve 5 is always in the same position, avoiding the problem of center offset. Since the spindle 6 is installed inside the bearing sleeve 5, radial positioning of the spindle 6 can be achieved.

[0028] Specifically, the rotary drive device includes a driven wheel 3 synchronously connected to the bearing sleeve 5. An adjusting rod 8 is mounted on the frame 15 of the grinding mill. One end of the adjusting rod 8 is connected to a driving wheel 9, which is connected to the driven wheel 3 via a conveyor belt 10. The other end of the adjusting rod 8 is connected to an adjusting handle 7. Rotating the adjusting handle 7 causes the adjusting rod 8 to rotate, thereby driving the bearing sleeve 5 to rotate using the driving wheel 9, the conveyor belt 10, and the driven wheel 3. In this example, the adjusting handle 7 is located on the outside of the frame 15 for easy operation by the operator. More specifically, both the driving wheel 9 and the driven wheel 3 are synchronous pulleys, and the conveyor belt 10 is a synchronous belt.

[0029] Specifically, the width of the belt mounting grooves on the circumference of the driving wheel 9 and the driven wheel 3 is greater than the width of the conveyor belt 10, so that the conveyor belt 10 can move within a certain range along the axial direction of the driving wheel 9 and the driven wheel 3, thereby realizing the function of position compensation. Specifically, it also includes a tensioning assembly for tensioning the conveyor belt 10. The tensioning assembly includes a connecting rod 12 mounted on the crushing mill frame 15. An adjustable tensioning wheel 11 is mounted on the connecting rod 12. The outer wall of the tensioning wheel 11 contacts the conveyor belt 10. More specifically, the connecting rod 12 can be fixed on the frame 15, and one end extends toward the conveyor belt 10. A strip groove is provided on the connecting rod 12, and the tensioning wheel 11 can move in the strip groove during installation to facilitate adjustment of the installation position of the tensioning wheel 11.

[0030] Specifically, the end of the main shaft 6 is connected to a coupling 2, which is connected to a motor 1 mounted on the mill frame 15. In this example, the coupling 2 is a plum blossom-shaped coupling 2, which has the function of moving in the axial direction, so as to enable the main shaft 6 to move along the axial direction.

[0031] In use, this device for adjusting the gap between the grinding discs of a pulverizing mill allows the operator to rotate the adjusting handle 7 outside the frame 15, which in turn moves the adjusting rod 8, the drive wheel 9, the conveyor belt 10, and the driven wheel 3 in sequence, thereby driving the bearing sleeve 5 installed inside the guide sleeve 4 to rotate. Because the bearing sleeve 5 is threadedly fitted to the guide sleeve 4, it moves axially during rotation, causing the main shaft 6 and the movable grinding disc 13 mounted on the main shaft 6 to adjust their axial positions, thus achieving precise adjustment of the gap between the fixed grinding disc 14 and the movable grinding disc 13.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for adjusting the gap between grinding discs in a pulverizing mill, characterized in that, include: A fixed guide sleeve (4) is provided, and a through mounting hole (403) is provided at the center of the guide sleeve (4). The bearing sleeve (5) is installed in the mounting hole (403) of the guide sleeve (4). The guide sleeve (4) and the bearing sleeve (5) are coaxial and threaded together so that the bearing sleeve (5) can move in the axial direction when it rotates relative to the guide sleeve (4). The main shaft (6) is mounted at the center of the bearing sleeve (5) via a bearing; The movable grinding disc (13) is mounted on the main shaft (6); A rotary drive device is connected to the bearing sleeve (5) and is used to drive the bearing sleeve (5) to rotate.

2. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 1, characterized in that, The inner wall of the guide sleeve (4) is provided with a first guide fitting section (401) and an internal thread connection section (402). The internal thread connection section (402) is located inside the guide sleeve (4) and near the end. The outer wall of the bearing sleeve (5) is provided with a second guide fitting section (501) and an external thread connection section (502). The external thread connection section (502) is located outside the bearing sleeve (5) and near the end. The internal thread connection section (402) and the external thread connection section (502) are threadedly fitted. The first guide fitting section (401) and the second guide fitting section (501) are slidably fitted.

3. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 1, characterized in that, The rotary drive device includes a driven wheel (3) synchronously connected to the bearing sleeve (5). An adjusting rod (8) is installed on the frame (15) of the pulverizer. One end of the adjusting rod (8) is connected to a driving wheel (9). The driving wheel (9) and the driven wheel (3) are connected through a conveyor belt (10). The other end of the adjusting rod (8) is connected to an adjusting handle (7). By rotating the adjusting handle (7), the adjusting rod (8) is rotated, thereby driving the bearing sleeve (5) to rotate using the driving wheel (9), the conveyor belt (10) and the driven wheel (3).

4. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 3, characterized in that, Both the driving wheel (9) and the driven wheel (3) are synchronous belt pulleys, and the conveyor belt (10) is a synchronous belt.

5. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 4, characterized in that, The width of the belt mounting grooves of the driving wheel (9) and the driven wheel (3) at the circumferential position is greater than the width of the conveyor belt (10).

6. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 3, characterized in that, It also includes a tensioning assembly for tensioning the conveyor belt (10), the tensioning assembly including a connecting rod (12) mounted on the crushing mill frame (15), the connecting rod (12) having an adjustable tensioning wheel (11) mounted on it, the outer wall of the tensioning wheel (11) being in contact with the conveyor belt (10).

7. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 1, characterized in that, The end of the main shaft (6) is connected to a coupling (2), which is connected to a motor (1) mounted on the mill frame (15).

8. The device for adjusting the gap between grinding discs in a pulverizing mill according to claim 7, characterized in that, The coupling (2) is a plum blossom-shaped coupling (2).

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