Automatic dry powder adding device for cement production and capable of achieving accurate discharging

Abstract

The utility model discloses an accurate blanking dry powder automatic adding device for cement production, which comprises a bearing mechanism, the bearing mechanism comprises a mounting base plate and a material collecting barrel, an electronic weighing device is fixedly mounted at the top of the mounting base plate, a bearing block is fixedly mounted at the top of the electronic weighing device, and a feeding mechanism is fixedly mounted at the top of the bearing block. A turnover unloading mechanism is mounted at the top of the electronic weighing device, and a vibration brushing mechanism is mounted on the surface of the mounting base plate; feeding mechanisms are installed on the left side and the right side of the material collecting barrel in a penetrating mode, and an adjusting and cleaning mechanism is installed at the center of the surface of the material collecting barrel. The additive adding device has the advantage of residue prevention, and solves the problems that a basic adding device cannot be well suitable for injection of different additives to be added, materials are prone to being left on a weighing piece, the amount of the additives entering cement processing equipment is different, the subsequent additive weighing precision is affected, and the production cost is reduced. And adverse effects on the cement production quality are further caused.

Description

Technical Field

[0001] This utility model relates to the field of cement processing technology, specifically to an automatic dry powder adding device for cement production with precise material feeding. Background Technology

[0002] During the cement production process, appropriate amounts of various additives need to be added in batches. Most of these additives are stored in the form of dry powder. The types and proportions of additives used are adjusted according to the different uses of the cement to make the prepared cement reach the specified strength. Then, an additive device is used to transfer various dry powders to the feed inlet of the cement processing equipment.

[0003] Basic additive devices typically use a method of weighing the material after it is fed in, and then pouring the material out. However, this method is not well-suited for injecting different additives. Material residue is easily left in the weighing parts, which not only causes differences in the amount of additive entering the cement processing equipment, but also affects the accuracy of subsequent additive weighing, thus adversely affecting the quality of cement production. Utility Model Content

[0004] The purpose of this invention is to provide an automatic dry powder addition device for cement production with precise feeding and the advantage of preventing residue. It solves the problem that the basic addition device cannot be well applied to the injection of different additives, and its weighing parts are prone to material residue. This not only causes the amount of additive entering the cement processing equipment to be different, but also affects the subsequent weighing accuracy of additives, thus adversely affecting the quality of cement production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic dry powder adding device for cement production with precise feeding, comprising a bearing mechanism, the bearing mechanism comprising a mounting base plate and a collecting cylinder, an electronic weighing device fixedly mounted on the top of the mounting base plate, a bearing block fixedly mounted on the top of the electronic weighing device, a flipping unloading mechanism mounted on the top of the electronic weighing device, and a vibration cleaning mechanism mounted on the surface of the mounting base plate.

[0006] Feeding mechanisms are installed through both the left and right sides of the collecting cylinder, and an adjustment and cleaning mechanism is installed at the center of the surface of the collecting cylinder.

[0007] As a preferred embodiment of the present invention, a dry powder automatic addition device for cement production with precise feeding, the number of mounting bases is two, and mounting seats are fixedly connected to both the front and rear sides of the surface of the mounting base. A stabilizing frame is fixedly connected to the top of the mounting base, and one side of the stabilizing frame is fixedly connected to the surface of the collecting cylinder.

[0008] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, the feeding mechanism includes a conveying cylinder, the surface of the conveying cylinder is fixedly connected to the connection of the collecting cylinder, the bottom of the inner cavity of the conveying cylinder is connected to a feeding hopper, a first motor is bolted to the bottom of the feeding mechanism, and a feeding auger is fixedly installed at the output end of the first motor and located in the inner cavity of the conveying cylinder.

[0009] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, the adjusting and cleaning mechanism includes a second motor, the bottom of the second motor is bolted to the top of the collecting cylinder, an auxiliary sleeve is fixedly connected to the output end of the second motor, and a rotating sleeve and an angle sensor are respectively fitted on the top surface of the auxiliary sleeve and located in the inner cavity of the collecting cylinder.

[0010] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, the angle sensor is located at the top of the rotating sleeve, the surface of the rotating sleeve is fixedly connected to the connection of the auxiliary sleeve, and arc-shaped grooves are provided on both the front and rear sides of the rotating sleeve.

[0011] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, a wireless air pump is fixedly installed at the top of the inner cavity of the auxiliary sleeve. The air inlet of the wireless air pump passes through the auxiliary sleeve and extends into the collecting cylinder. A spring is fixedly connected to the inner wall of the auxiliary sleeve. A rectangular rod is fixedly connected to the bottom end of the spring. A cleaning rod is fixedly connected to the left side of the rectangular rod. A wireless air pressure sensor is fixedly embedded at the top of the rectangular rod.

[0012] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise material feeding, the tilting unloading mechanism includes a fixed ring, the bottom of which is fixedly connected to the top of the bearing block, a third motor is fixedly installed on the front side of the surface of the fixed ring, a movable rod is fixedly connected to the output end of the third motor, a sealing disc is fixedly sleeved on the surface of the movable rod, and the outer ring of the sealing disc slides in contact with the inner ring of the fixed ring and performs sealing treatment.

[0013] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, the vibration cleaning mechanism includes a fourth motor, the bottom of which is bolted to the top of the mounting base plate, and a rotating blade is fixedly sleeved at the output end of the fourth motor and located at the bottom of the mounting base plate.

[0014] As a preferred embodiment of the present invention, an automatic dry powder adding device for cement production with precise feeding, wherein a slot is provided through the surface of the rotating blade, an elastic rubber strip is fixedly connected to the inner wall of the slot, and a connecting strip is fixedly connected to the inner ring of the elastic rubber strip.

[0015] As a preferred embodiment of the present invention, a dry powder automatic addition device for cement production with precise feeding, a small vibrating motor is fixedly installed at the bottom of the connecting strip, and the number of the small vibrating motors is two. A groove is opened through the top of the connecting strip, and an elastic brush is fixedly connected to the top of the connecting strip and outside the groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. By setting up a support mechanism, this utility model can use a stabilizing frame to firmly connect the mounting base plate, the collecting cylinder and the conveying cylinder, ensuring the overall structural stability. In conjunction with the support block and the electronic weighing device, the tilting unloading mechanism and the dry powder additive above are weighed to achieve the purpose of weighing and detection, and to ensure the accuracy of material addition.

[0018] 2. By setting up a feeding mechanism, this utility model enables the material conveyed by the hopper to enter the conveying cylinder when the first motor is working, and the rotating feeding auger continuously conveys it upwards to achieve the purpose of uniform feeding. It also has an auxiliary stirring function, which can effectively prevent dry powder materials from agglomerating into lumps.

[0019] 3. By setting up an adjustment and cleaning mechanism, this utility model can drive the cleaning rod to rotate and clean the inner wall of the collecting cylinder when the second motor is working, through the cooperation of the auxiliary sleeve and the rectangular rod, so as to avoid material residue. The position of the arc groove can be changed by the cooperation of the auxiliary sleeve and the rotating sleeve, so as to adjust the overlapping area between the arc groove and the discharge end of the conveying cylinder to meet the feeding requirements of different needs.

[0020] 4. By setting up a flipping unloading mechanism, this utility model can flip the sealing disc in conjunction with the movable rod when the third motor is working, so as to concentrate and discharge the top material downwards.

[0021] 5. By setting up a vibration cleaning mechanism, this utility model can control the operation of a fourth motor, so that the rotating blade drives the connecting strip and the elastic brush to rotate. The elastic brush completes the cleaning of the sealing disc, while the small vibration motor works synchronously, so that the elastic brush vibrates continuously to ensure the cleaning effect, which is more in line with actual use needs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 This is a bottom-view perspective view of the present invention;

[0024] Figure 3 This is a sectional perspective view of the present invention;

[0025] Figure 4 This is a partial sectional perspective view of the bearing mechanism of this utility model;

[0026] Figure 5 This is a sectional perspective view of the feeding mechanism of this utility model;

[0027] Figure 6 This is a partial sectional perspective view of the adjusting and cleaning mechanism of this utility model;

[0028] Figure 7 This utility model Figure 6 Enlarged diagram of A in the middle;

[0029] Figure 8 This is a bottom-view perspective view of the rotating sleeve of this utility model;

[0030] Figure 9 This is a partial sectional perspective view of the tilting unloading mechanism of this utility model;

[0031] Figure 10 This is a perspective view of the vibration cleaning mechanism of this utility model when it is separated.

[0032] In the diagram: 1. Bearing mechanism; 101. Mounting base; 102. Stabilizing frame; 103. Collecting cylinder; 104. Mounting base; 105. Bearing block; 106. Electronic weighing device; 2. Feeding mechanism; 201. Conveying cylinder; 202. Feeding auger; 203. Discharge hopper; 204. First motor; 3. Adjustment and cleaning mechanism; 301. Rotating sleeve; 302. Angle sensor; 303. Second motor; 304. Auxiliary sleeve; 305. Rectangular rod; 306. Arc 307. Cleaning rod; 308. Wireless air pump; 309. Spring; 310. Wireless air pressure sensor; 4. Tilting unloading mechanism; 401. Fixing ring; 402. Third motor; 403. Movable rod; 404. Sealing disc; 5. Vibration cleaning mechanism; 501. Fourth motor; 502. Rotating blade; 503. Empty trough; 504. Elastic rubber strip; 505. Small vibration motor; 506. Slot; 507. Elastic brush; 508. Connecting strip. Detailed Implementation

[0033] Please see Figures 1-10 An automatic dry powder adding device for cement production with precise feeding includes a bearing mechanism 1. The bearing mechanism 1 includes a mounting base plate 101 and a collecting cylinder 103. An electronic weighing device 106 is fixedly installed on the top of the mounting base plate 101. A bearing block 105 is fixedly installed on the top of the electronic weighing device 106. A flipping unloading mechanism 4 is installed on the top of the electronic weighing device 106. A vibration cleaning mechanism 5 is installed on the surface of the mounting base plate 101.

[0034] Feeding mechanisms 2 are installed through both the left and right sides of the collecting cylinder 103, and an adjustment and cleaning mechanism 3 is installed at the center of the surface of the collecting cylinder 103.

[0035] Furthermore, there are two mounting bases 101. Mounting seats 104 are fixedly connected to the front and rear sides of the surface of the mounting base 101. A stabilizing frame 102 is fixedly connected to the top of the mounting base 101. One side of the stabilizing frame 102 is fixedly connected to the surface of the collecting cylinder 103.

[0036] Furthermore, the feeding mechanism 2 includes a transmission cylinder 201, the surface of the transmission cylinder 201 is fixedly connected to the connection of the collecting cylinder 103, the bottom of the inner cavity of the transmission cylinder 201 is connected to the discharge hopper 203, the bottom of the feeding mechanism 2 is bolted with a first motor 204, and the output end of the first motor 204 is fixedly installed with a feeding auger 202 located in the inner cavity of the transmission cylinder 201.

[0037] Furthermore, the adjusting cleaning mechanism 3 includes a second motor 303. The bottom of the second motor 303 is bolted to the top of the collecting cylinder 103. An auxiliary sleeve 304 is fixedly connected to the output end of the second motor 303. A rotating sleeve 301 and an angle sensor 302 are respectively fitted on the top surface of the auxiliary sleeve 304 and in the inner cavity of the collecting cylinder 103.

[0038] Furthermore, the angle sensor 302 is located on the top of the rotating sleeve 301, the surface of the rotating sleeve 301 is fixedly connected to the connection of the auxiliary sleeve 304, and arc-shaped grooves 306 are provided on both the front and rear sides of the rotating sleeve 301.

[0039] Furthermore, a wireless air pump 308 is fixedly installed on the top of the inner cavity of the auxiliary sleeve 304. The air inlet of the wireless air pump 308 passes through the auxiliary sleeve 304 and extends into the collection cylinder 103. A spring 309 is fixedly connected to the inner wall of the auxiliary sleeve 304. A rectangular rod 305 is fixedly connected to the bottom end of the spring 309. A cleaning rod 307 is fixedly connected to the left side of the rectangular rod 305. A wireless air pressure sensor 310 is fixedly embedded on the top of the rectangular rod 305.

[0040] Furthermore, the tipping unloading mechanism 4 includes a fixed ring 401, the bottom of which is fixedly connected to the top of the bearing block 105. A third motor 402 is fixedly installed on the front side of the surface of the fixed ring 401. A movable rod 403 is fixedly connected to the output end of the third motor 402. A sealing disc 404 is fixedly sleeved on the surface of the movable rod 403. The outer ring of the sealing disc 404 slides in contact with the inner ring of the fixed ring 401 and performs a sealing treatment.

[0041] Furthermore, the vibration cleaning mechanism 5 includes a fourth motor 501, the bottom of which is bolted to the top of the mounting base plate 101, and a rotating blade 502 is fixedly sleeved at the output end of the fourth motor 501 and located at the bottom of the mounting base plate 101.

[0042] Furthermore, a slot 503 is provided through the surface of the rotating blade 502, and an elastic rubber strip 504 is fixedly connected to the inner wall of the slot 503. A connecting strip 508 is fixedly connected to the inner ring of the elastic rubber strip 504.

[0043] Furthermore, a small vibration motor 505 is fixedly installed at the bottom of the connecting strip 508. There are two small vibration motors 505. A groove 506 is opened through the top of the connecting strip 508. An elastic brush 507 is fixedly connected to the top of the connecting strip 508 and outside the groove 506.

[0044] The outer ring of the fixing ring 401 slides in contact with the inner wall of the collecting cylinder 103 and is sealed. The outer ring at the top of the fixing ring 401 is raised. This design allows the dry powder material to flow naturally inward under the help of gravity.

[0045] The inner diameters of the left and right ends of the arc-shaped groove 306 are different. With this design, by rotating the rotating sleeve 301 at a certain angle, different positions on the arc-shaped groove 306 can be aligned with the transmission cylinder 201. Thus, by utilizing the different discharge inner diameters on the arc-shaped groove 306, different feeding precision requirements can be met for different dry powder materials. For example, for materials with high precision requirements, the rotating sleeve 301 can be rotated to adjust the angle of the arc-shaped groove 306 so that the smaller inner diameter on the arc-shaped groove 306 coincides with the transmission cylinder 201. At this time, the dry powder conveyed by the feeding auger 202 will be discharged through the smaller inner diameter on the arc-shaped groove 306.

[0046] The surface of the rectangular rod 305 slides in contact with the inner wall of the auxiliary sleeve 304 and is sealed.

[0047] The wireless air pump 308 is a dual-purpose air pump for pumping and filling air, and it has a built-in battery and wireless signal transmitter.

[0048] The wireless barometric sensor 310 includes a barometric sensor body, a button battery, and a wireless signal transmitter;

[0049] In practical applications, the device is equipped with an external digital display controller. The detection signals of the angle sensor 302, the wireless air pressure sensor 310 and the electronic weighing device 106 are all transmitted to the digital display controller for display. The first motor 204, the second motor 303, the third motor 402, the fourth motor 501 and the small vibration motor 505 are all electrically connected to the external digital display controller.

[0050] By setting up the stabilizing frame 102, it can be connected to the mounting base 101, the collecting cylinder 103 and the conveying cylinder 201, which can effectively ensure the overall stability of the device. By setting up the mounting base 104, the mounting base 101 can be fixedly installed in a suitable position with the help of external bolts.

[0051] By setting the bearing block 105, the fixed ring 401 can be supported and connected. By setting the feeding auger 202 and the first motor 204, the feeding auger 202 can be rotated under the drive of the first motor 204, thereby continuously conveying the material upward.

[0052] By setting an angle sensor 302, the rotation angle of the auxiliary sleeve 304 can be monitored in real time. By setting the auxiliary sleeve 304 and the rectangular rod 305, the rectangular design can be used to make the rectangular rod 305 rotate synchronously when the auxiliary sleeve 304 rotates, and the height of the cleaning rod 307 can be adjusted by the continuous extension and retraction of the rectangular rod 305.

[0053] By setting the arc groove 306, it can overlap with the transmission cylinder 201, so that the feeding auger 202 moves upward to transmit the material and discharge it through the arc groove 306. By setting the cleaning rod 307, it can rotate with the rectangular rod 305 and then fit into the collecting cylinder 103 to scrape and clean the inner wall of the collecting cylinder 103.

[0054] By setting the spring 309, gas can be filled into or drawn out between the auxiliary sleeve 304 and the rectangular rod 305 during operation, thereby flexibly changing the height of the rectangular rod 305. By setting the fixing ring 401, the fixed installation requirements of the third motor 402 can be met. By setting the movable rod 403 and the sealing disc 404, the dry powder material can be discharged downward when the sealing disc 404 is flipped.

[0055] By setting up the empty trough 503 and the trough 506, the requirements for the falling space of powder can be met. By setting up the elastic rubber strip 504, it can be connected to the rotating blade 502 and the connecting strip 508. Utilizing its own elasticity, the connecting strip 508 can move flexibly without detaching from the rotating blade 502.

[0056] By setting a small vibration motor 505, the connecting strip 508 can vibrate continuously during operation. By setting an elastic brush 507 and a connecting strip 508, the surface of the sealing disc 404 can be cleaned by the elastic brush 507 to avoid dry powder material residue.

[0057] A method for using an automatic dry powder adding device for cement production with precise material feeding includes the following steps:

[0058] 1) First, use bolts and mounting base 104 to fix the mounting base 101 at the feed end of the cement processing equipment, and ensure that the mounting base 101 is in a horizontal state.

[0059] 2) Based on the feeding accuracy and weight requirements of the dry powder material to be added, the angle sensor 302 is set to detect the angle value and the electronic weighing device 106 is set to weigh the value. The second motor 303 is controlled to work, driving the auxiliary sleeve 304 to rotate. The rotating sleeve 301 rotates synchronously with the auxiliary sleeve 304, changing the overlapping area between the arc groove 306 and the transmission cylinder 201.

[0060] 3) The material to be added is added into the conveying cylinder 201 through the feeding hopper 203, and the first motor 204 is controlled to drive the feeding auger 202 to rotate. The rotating feeding auger 202 drives the material to move upward continuously, and finally enters the collecting cylinder 103 through the arc groove 306, and finally falls onto the sealing plate 404.

[0061] 4) As the falling material gradually increases, the electronic weighing device 106 detects that the material weight has reached the preset value, and then controls the third motor 402 to work, driving the movable rod 403 and the sealing plate 404 to rotate, so that the material falls naturally into the cement processing equipment, completing the weighing and unloading.

[0062] 5) In step four, to prevent material residue on the inner wall of the collecting cylinder 103 and to ensure good material discharge, after most of the material has been discharged, the second motor 303 is controlled to operate, driving the auxiliary sleeve 304 to rotate continuously. The rectangular rod 305 drives the cleaning rod 307 to rotate and clean the inner wall of the collecting cylinder 103, ensuring good material discharge. At the same time, the wireless air pump 308 is controlled to operate, introducing gas between the auxiliary sleeve 304 and the rectangular rod 305. The increased air pressure causes the rectangular rod 305 to move automatically downward under pressure, and the spring 309 is stretched. Similarly, when the wireless air pump 308 operates to discharge gas, the rectangular rod 305 will automatically move upward under the action of the spring 309. This is used to realize the up and down movement of the cleaning rod 307, completing the cleaning of different positions inside the collecting cylinder 103 and ensuring overall cleaning uniformity.

[0063] 6) After the material is unloaded, the third motor 402 is controlled to rotate the sealing disc 404 180 degrees. Then, the fourth motor 501 is controlled to drive the rotating blade 502 to rotate, so that the elastic brush 507 contacts the bottom surface of the sealing disc 404 to complete the cleaning of the sealing disc 404. At the same time, the small vibration motor 505 is controlled to work, so that the connecting strip 508 and the elastic brush 507 vibrate continuously to ensure the cleaning effect. Since some material remains on the elastic brush 507 due to the cleaning of the sealing disc 404, the vibration design shakes the material off the elastic brush 507 and continues to fall through the trough 506 and the empty trough 503.

[0064] 7) The cleaning by the cleaning rod 307 and the elastic brush 507 not only allows the weighed material to enter the cement processing equipment well, but also avoids material residue, which is conducive to the accurate weighing of different materials in the future. At the same time, it avoids the premixing effect between different materials and ensures the quality of subsequent cement production and processing.

[0065] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic dry powder adding device for cement production with precise feeding, comprising a bearing mechanism (1), characterized in that: The supporting mechanism (1) includes a mounting base plate (101) and a collecting cylinder (103). An electronic weighing device (106) is fixedly mounted on the top of the mounting base plate (101). A supporting block (105) is fixedly mounted on the top of the electronic weighing device (106). A flipping unloading mechanism (4) is mounted on the top of the electronic weighing device (106). A vibration cleaning mechanism (5) is mounted on the surface of the mounting base plate (101). A feeding mechanism (2) is installed through both the left and right sides of the collecting cylinder (103). An adjustment cleaning mechanism (3) is installed at the center of the surface of the collecting cylinder (103). The adjustment and cleaning mechanism (3) includes a second motor (303), the bottom of which is bolted to the top of the collection cylinder (103), and an auxiliary sleeve (304) is fixedly connected to the output end of the second motor (303). A rotating sleeve (301) and an angle sensor (302) are respectively fitted on the top of the surface of the auxiliary sleeve (304) and in the inner cavity of the collection cylinder (103). The overturning unloading mechanism (4) includes a fixed ring (401), the bottom of which is fixedly connected to the top of the bearing block (105). A third motor (402) is fixedly installed on the front side of the surface of the fixed ring (401). A movable rod (403) is fixedly connected to the output end of the third motor (402). A sealing disc (404) is fixedly sleeved on the surface of the movable rod (403). The outer ring of the sealing disc (404) slides in contact with the inner ring of the fixed ring (401) and performs a sealing treatment. The vibration cleaning mechanism (5) includes a fourth motor (501), the bottom of which is bolted to the top of the mounting base plate (101), and a rotating blade (502) is fixedly sleeved at the output end of the fourth motor (501) and located at the bottom of the mounting base plate (101).

2. The automatic dry powder adding device for cement production with precise feeding as described in claim 1, characterized in that: The number of mounting bases (101) is two. Mounting seats (104) are fixedly connected to the front and rear sides of the surface of the mounting base (101). A stabilizing frame (102) is fixedly connected to the top of the mounting base (101). One side of the stabilizing frame (102) is fixedly connected to the surface of the collecting cylinder (103).

3. The automatic dry powder adding device for cement production with precise feeding as described in claim 1, characterized in that: The feeding mechanism (2) includes a transmission cylinder (201), the surface of which is fixedly connected to the connection of the collection cylinder (103), the bottom of the inner cavity of the transmission cylinder (201) is connected to the discharge hopper (203), the bottom of the feeding mechanism (2) is bolted to a first motor (204), and the output end of the first motor (204) and located in the inner cavity of the transmission cylinder (201) are fixedly installed with a feeding auger (202).

4. The automatic dry powder adding device for cement production with precise feeding as described in claim 1, characterized in that: The angle sensor (302) is located on the top of the rotating sleeve (301). The surface of the rotating sleeve (301) is fixedly connected to the connection of the auxiliary sleeve (304). Arc-shaped grooves (306) are provided on both the front and rear sides of the rotating sleeve (301).

5. The automatic dry powder adding device for cement production with precise feeding as described in claim 1, characterized in that: A wireless air pump (308) is fixedly installed at the top of the inner cavity of the auxiliary sleeve (304). The air inlet of the wireless air pump (308) passes through the auxiliary sleeve (304) and extends into the collection cylinder (103). A spring (309) is fixedly connected to the inner wall of the auxiliary sleeve (304). A rectangular rod (305) is fixedly connected to the bottom end of the spring (309). A cleaning rod (307) is fixedly connected to the left side of the rectangular rod (305). A wireless air pressure sensor (310) is fixedly embedded at the top of the rectangular rod (305).

6. The automatic dry powder adding device for cement production with precise feeding as described in claim 1, characterized in that: A slot (503) is provided through the surface of the rotating blade (502). An elastic rubber strip (504) is fixedly connected to the inner wall of the slot (503), and a connecting strip (508) is fixedly connected to the inner ring of the elastic rubber strip (504).

7. The automatic dry powder adding device for cement production with precise feeding as described in claim 6, characterized in that: Two small vibration motors (505) are fixedly installed at the bottom of the connecting strip (508). A groove (506) is opened through the top of the connecting strip (508). An elastic brush (507) is fixedly connected to the top of the connecting strip (508) and outside the groove (506).

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