Quantitative discharging device

By designing a quantitative cutting device, the problem of difficulty in controlling the addition amount of domestic quartz sand and imported quartz sand in the prior art is solved, and the precise cutting and operation of quartz sand is achieved is achieved, and the working efficiency is improved.

CN223267925UActive Publication Date: 2025-08-26LESHAN JINGLONG QUARTZ GLASS PROD CO LTD
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Patent Information

Application Number
CN202422387532.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-29
Publication Date
2025-08-26
Estimated Expiration
2034-09-29

AI Technical Summary

Technical Problem

The existing feeding devices are not convenient to control the addition of domestic quartz sand and imported quartz sand respectively, and there is no switch at the bottom of the feeding device, which makes it difficult for staff to control the amount of each quartz sand.

Method used

A quantitative cutting device is designed, including two storage tanks, connecting components, control components and driving components. Through the coordination of the rotating shaft and the sealing plate, quantitative cutting control of quartz sand is realized. A scale line is set at the bottom of the storage tank to facilitate monitoring of the fall volume, and the driving component realizes the opening and closing of the sealing plate through the rack and rack structure.

Benefits of technology

The separate control of domestic quartz sand and imported quartz sand is achieved, ensuring the accuracy of quartz sand cutting and simplicity of operation, avoiding device dumping and improving work efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of quartz crucible production equipment. The quantitative discharging device comprises two material storage tanks, the two material storage tanks are detachably connected through a connecting assembly, scale marks are arranged on tank bodies of the material storage tanks, discharging pipes are arranged at the bottoms of the material storage tanks in a communicating mode, and a control assembly used for controlling opening and closing of the discharging pipes is further arranged at the bottoms of the material storage tanks. A mounting box is arranged on the side wall of the storage tank, a driving assembly used for driving the rotating shaft to rotate is arranged in the mounting box, and a holding piece is arranged on the outer wall of the mounting box. The quartz sand feeding device has the advantages that the two storage tanks, the connecting rod, the control assembly and the driving assembly are arranged, so that domestic quartz sand and imported quartz sand can be conveniently and respectively placed in the two storage tanks, and the blanking of each kind of quartz sand can be conveniently and respectively controlled.
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Description

Technical Field

[0001] The utility model relates to the technical field of quartz crucible production equipment, in particular to a quantitative feeding device. Background Art

[0002] Quartz crucibles are consumable vessels used in the production of single crystal silicon. One quartz crucible is consumed for each batch of single crystal silicon produced. Quartz crucibles are essential for single crystal silicon production and are widely used in numerous industries, including photovoltaics, electronics, and chemicals. Because single crystal silicon is the primary raw material for large-scale integrated circuits and solar cells, the requirements for quartz crucibles are extremely stringent. Due to the rapid growth of the solar energy market in recent years, coupled with the low technical requirements for quartz crucibles used in domestic solar single crystal silicon production, domestic quartz crucibles are primarily supplied to domestic solar single crystal silicon production, resulting in rapid growth in usage and significant changes in the specifications, variety, and quantity of large-scale quartz crucibles.

[0003] In order to reduce production costs, domestic quartz sand and imported quartz sand are often mixed in the current domestic production of some quartz crucibles. Domestic quartz sand is used for the outer layer of the quartz crucible, and imported quartz sand is used for the inner layer of the quartz crucible. However, when adding materials to the quartz crucible forming mold, the existing feeding device is not convenient for controlling the addition of domestic quartz sand and imported quartz sand separately, and there is no switch at the bottom of the feeding device, which makes it inconvenient for the staff to control the addition amount of each type of quartz sand. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the present application provides a quantitative feeding device.

[0005] The present application provides a quantitative feeding device, which adopts the following technical solution:

[0006] The top of the loading platform is connected to the loading platform of claim 1, wherein the bottom of the loading platform is connected to the loading platform of the plurality of loading platforms.

[0007] By adopting the above technical solution, the staff can freely choose one storage tank or two storage tanks according to the current work requirements. When unloading is required, the staff drives the rotating shaft to rotate through the driving component. The rotation of the rotating shaft will drive the sealing plate to rotate. At this time, the spring is compressed, the discharge pipe is opened, and the quartz sand in the storage tank can fall through the discharge pipe. The scale lines set on the tank body of the storage tank are convenient for the staff to monitor the falling amount of quartz sand. When the falling amount of quartz sand reaches the specified amount, the staff releases the driving component, and the compressed spring will release energy at this time, thereby pushing the rotating shaft to rotate in the opposite direction, and then the sealing plate will re-block the unloading pipe. The equipment has a simple structure and is easy and convenient to operate.

[0008] Optionally, the driving assembly includes a first bevel gear, a second bevel gear, a gear, a rack, a transmission rod, a connecting rod and a torsion spring. The first bevel gear is coaxially arranged on the top of the rotating shaft, and the transmission rod is rotatably arranged on the mounting box. The second bevel gear is coaxially arranged at one end of the transmission rod, the first bevel gear is meshed with the second bevel gear, and the gear is coaxially arranged at the other end of the transmission rod. The connecting rod is connected to one end of the rack and a connecting shaft is provided at the other end. The connecting shaft is rotatably arranged inside the mounting box, the torsion spring is sleeved on the connecting shaft, the rack is meshed with the gear, and an extrusion block is slidably provided on the mounting box, and one end of the extrusion block abuts against the connecting rod.

[0009] By adopting the above technical solution, when the rotating shaft needs to be rotated, the staff presses the extrusion block with their fingers, and then slides the extrusion block. The sliding extrusion block will push the connecting rod to rotate around the connecting shaft. During the rotation of the connecting rod, the rack will also move with the connecting shaft as the center. At this time, the torsion spring accumulates energy, and the rack will drive the gear to rotate during the movement. During the rotation of the gear, the transmission rod and the second bevel gear will rotate synchronously. During the rotation of the second bevel gear, the first bevel gear will be driven to rotate. During the rotation of the first bevel gear, the rotating shaft will be driven to rotate, thereby driving the sealing plate to move in the direction away from the discharge pipe to facilitate the discharge of quartz sand.

[0010] Optionally, a support ring is provided on the sliding sleeve of the tank body of the storage tank, and a plurality of support rods are evenly arranged on the bottom of the support ring along the vertical direction, and a storage component for accommodating the support rods is provided on the side wall of the installation box.

[0011] By adopting the above technical solution, since the bottom of the storage tank is conical, it is convenient to place the storage tank on a flat surface by providing a support ring and multiple support rods, and the storage tank is not easy to tip over after being placed.

[0012] Optionally, the storage assembly includes a sliding seat and a sliding rod, the sliding seat is fixedly arranged on one side of the installation box in the vertical direction, the sliding rod is horizontally passed through the sliding seat, and the sliding rod is slidably connected to the sliding seat, one end of the sliding rod is connected to the support ring, and the other end is provided with a positioning piece, the sliding seat is provided with a plurality of positioning holes along its own length direction, the positioning piece is provided with an insertion rod, and one end of the insertion rod is inserted into the positioning hole.

[0013] By adopting the above technical solution, when unloading, the support rod may affect the staff's movement of the storage tank. The storage assembly can make the support ring and multiple support rods slide in the direction away from the discharge pipe when the staff unloads. At this time, the bottom of the support rod is away from the bottom of the discharge pipe, and then the insertion rod is inserted into the positioning hole to fix the current position; when the storage tank needs to be placed horizontally, the support ring and the support rod are slid in the direction close to the discharge pipe to make the installation height of the bottom of the discharge pipe, and then the insertion rod is used again to fix the current position.

[0014] Optionally, the gripping piece is arranged on a side of the installation box away from the storage tank, and a placement groove for placing fingers is provided on the gripping piece.

[0015] By adopting the above technical solution, the staff can easily lift the storage tank by placing their fingers in the placement groove.

[0016] Optionally, the connecting assembly includes a connecting rod and two sleeves, the two sleeves are respectively arranged on two storage tanks, the two ends of the connecting rod are respectively inserted into the two sleeves, and both sleeves are provided with bolts for fixing the connecting rod.

[0017] By adopting the above technical solution, when two storage tanks need to be used, the two ends of the connecting rod are respectively inserted into the two sleeves, and then the two ends of the connecting rod are respectively fixed with bolts.

[0018] Optionally, an anti-slip pad is provided on one end of the extrusion block away from the connecting rod.

[0019] By adopting the above technical solution, the anti-slip pad can increase the friction between itself and the fingers of the staff, thereby making it easier for the staff to push the extrusion block.

[0020] Optionally, a feeding funnel is provided on the top of the storage tank, and the feeding funnel is threadedly connected to the top wall of the storage tank.

[0021] By adopting the above technical solution, quartz sand is poured into the feeding funnel, and the quartz sand can enter the storage tank through the feeding funnel, so that the staff can easily add quartz sand to the storage tank.

[0022] The utility model has the following advantages:

[0023] 1. By setting up two storage tanks, connecting rods, control components and drive components, it is convenient to place domestic quartz sand and imported quartz sand in the two storage tanks respectively, and then it is convenient to control the discharge of each type of quartz sand separately;

[0024] 2. By providing a support ring, a support rod and a storage assembly, it is easy to place the storage tank on a flat surface, and the storage tank is not easy to tip over after being placed, making it easy to add quartz sand into the storage tank;

[0025] 3. By setting the anti-slip pad, the anti-slip pad can increase the friction between itself and the staff's fingers, thereby making it easier for the staff to push the extrusion block. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the installation structure of the storage component of the utility model;

[0028] Figure 3 This is a schematic diagram of the installation structure of the installation box of the utility model;

[0029] Figure 4 This is a schematic diagram of the installation structure of the drive assembly of the utility model;

[0030] In the figure: 1. Storage tank; 11. Scale line; 12. Discharge pipe; 13. Support ring; 14. Support rod; 15. Mounting box; 2. Connecting assembly; 21. Connecting rod; 22. Sleeve; 23. Bolt; 3. Control assembly; 31. Rotating shaft; 32. Sealing plate; 33. Mounting block; 34. Mounting slot; 35. Fixing rod; 36. Spring; 4. Driving assembly; 41. First bevel gear; 42. Second bevel gear; 43. Gear; 44. Rack; 45. Transmission rod; 46. Connecting rod; 47. Torsion spring; 48. Connecting shaft; 49. Extrusion block; 5. Grip; 51. Placement slot; 6. Storage assembly; 61. Sliding seat; 62. Sliding rod; 63. Positioning piece; 64. Positioning hole; 65. Insert rod; 7. Anti-slip pad; 8. Feeding funnel. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0032] like Figures 1 to 4As shown, a quantitative feeding device includes two storage tanks 1, which are detachably connected by a connecting assembly 2. A scale line 11 is set on the tank body of the storage tank 1 along its own height direction. The bottom of the storage tank 1 is connected and installed with a discharge pipe 12. The bottom of the storage tank 1 is also installed with a control assembly 3 for controlling the opening and closing of the discharge pipe 12. The control assembly 3 includes a rotating shaft 31 and a sealing plate 32. The rotating shaft 31 is rotatably installed at the bottom of the storage tank 1, and the rotating shaft 31 is set in the vertical direction. One end of the sealing plate 32 is sleeved on the rotating shaft. 31 and is fixedly connected to the rotating shaft 31. One end of the blocking plate 32 is a circular plate. The diameter of the circular plate is larger than the diameter of the discharge pipe 12. The other end of the blocking plate 32 is long and connected to the rotating shaft 31. A mounting block 33 is installed on the discharge pipe 12. The mounting block 33 is provided with a mounting groove 34 for convenient placement of the blocking plate 32. A fixing rod 35 is fixedly installed on the bottom of the storage tank 1 in the vertical direction. A spring 36 is installed on the fixing rod 35. One end of the spring 36 is connected to the fixing rod 35 and the other end is connected to the end of the blocking plate 32 near the rotating shaft 31. , an installation box 15 is provided on the side wall of the storage tank 1, and a driving assembly 4 for driving the rotating shaft 31 to rotate is installed in the installation box 15, and a gripping piece 5 is installed on the outer wall of the installation box 15; when it is necessary to unload the material, the staff drives the rotating shaft 31 to rotate through the driving assembly 4, and the rotation of the rotating shaft 31 will drive the blocking plate 32 to rotate. At this time, the spring 36 is compressed, and the discharge pipe 12 is opened, and the quartz sand in the storage tank 1 can fall through the discharge pipe 12. The scale line 11 provided on the tank body of the storage tank 1 is convenient for the staff to check the falling amount of the quartz sand. Monitor, when the amount of quartz sand falling reaches the specified amount, the staff releases the drive component 4, and the compressed spring 36 will release energy at this time, thereby pushing the rotating shaft 31 to rotate in the opposite direction, and then the sealing plate 32 will re-block the discharge pipe. The connecting component 2 enables the staff to freely choose one storage tank 1 or two storage tanks 1 according to the current work requirements, so that it is convenient to place domestic quartz sand and imported quartz sand in the two storage tanks 1 respectively, and then it is convenient to control the discharge of each type of quartz sand separately. The equipment has a simple structure and is easy and convenient to operate.

[0033] like Figures 1 to 4As shown, the drive assembly 4 includes a first bevel gear 41, a second bevel gear 42, a gear 43, a rack 44, a transmission rod 45, a connecting rod 46 and a torsion spring 47. The top of the rotating shaft 31 extends to the interior of the mounting box 15. The first bevel gear 41 is coaxially mounted on the top of the rotating shaft 31. The transmission rod 45 is rotatably mounted on the bottom wall of the mounting box 15. The second bevel gear 42 is coaxially mounted on one end of the transmission rod 45. The first bevel gear 41 meshes with the second bevel gear 42. The gear 43 is coaxially mounted on the other end of the transmission rod 45. The connecting rod 46 is connected to one end of the rack 44 and a connecting shaft 48 is installed on the other end. The connecting shaft 48 is rotatably mounted inside the mounting box 15. The torsion spring 47 is sleeved on the connecting shaft 48. The rack 44 meshes with the gear 43. An extrusion block 49 is slidably mounted on the mounting box 15. One end of the extrusion block 49 abuts against the connecting rod 46. When it is necessary to rotate the rotating shaft 31, the staff presses the extrusion block with their fingers The block 49 then slides the extrusion block 49, and the sliding extrusion block 49 will push the connecting rod 46 to rotate with the connecting shaft 48 as the center. During the rotation of the connecting rod 46, the rack 44 will also move with the connecting shaft 48 as the center. At the same time, the torsion spring 47 accumulates energy, and the rack 44 will drive the gear 43 to rotate during the movement. During the rotation of the gear 43, the transmission rod 45 and the second bevel gear 42 will rotate synchronously. During the rotation of the second bevel gear 42, the first bevel gear 41 will be driven to rotate. During the rotation of the first bevel gear 41, the rotating shaft 31 will be driven to rotate, thereby driving the sealing plate 32 to move in the direction away from the discharge pipe 12 to facilitate the unloading of quartz sand; after unloading is completed, the staff releases the pressing block, and the torsion spring 47 will release the accumulated energy, thereby causing the connecting rod 46 to rotate in the opposite direction around the connecting shaft 48, thereby driving the rack 44 to drive the rotating shaft 31 to rotate in the opposite direction, and the sealing plate 32 will return to the mounting groove 34.

[0034] like Figures 1 to 4 As shown, a support ring 13 is provided on the tank body of the storage tank 1, and a plurality of support rods 14 are evenly installed on the bottom of the support ring 13 along the vertical direction. A storage assembly 6 for accommodating the support rods 14 is installed on the side wall of the installation box 15; since the bottom of the storage tank 1 is conical, the storage tank 1 can be placed on a plane by providing the support ring 13 and the plurality of support rods 14, and the storage tank 1 is not easy to tip over after being placed.

[0035] like Figures 1 to 4As shown, the storage assembly 6 includes a sliding seat 61 and a sliding rod 62. The sliding seat 61 is fixedly installed on one side of the installation box 15 along the vertical direction, and the sliding seat 61 is arranged along the vertical direction. The sliding rod 62 is horizontally penetrated on the sliding seat 61, and the sliding rod 62 is slidably connected to the sliding seat 61. One end of the sliding rod 62 is connected to the support ring 13, and the other end is provided with a positioning piece 63. A plurality of positioning holes 64 are opened on the sliding seat 61 along its own length direction. The positioning piece 63 is installed with an insertion rod 65, and one end of the insertion rod 65 is inserted into the positioning hole 64; when cutting, , the support rod 14 may affect the staff's movement of the storage tank 1. The storage component 6 can make the support ring 13 and multiple support rods 14 slide in the direction away from the discharge pipe 12 when the staff unloads. At this time, the bottom of the support rod 14 is away from the bottom of the discharge pipe 12, and then the insertion rod 65 is inserted into the positioning hole 64, which can fix the current position; when the storage tank 1 needs to be placed horizontally, the support ring 13 and the support rod 14 are slid in the direction close to the discharge pipe 12 to make the installation height of the bottom of the discharge pipe 12, and then the insertion rod 65 is used again to fix the current position.

[0036] like Figures 1 to 4 As shown, the gripping member 5 is fixedly mounted on the side of the mounting box 15 away from the storage tank 1 , and a placement groove 51 is provided on the gripping member 5 for convenient placement of fingers; the staff can easily lift the storage tank 1 by placing their fingers in the placement groove 51 .

[0037] like Figures 1 to 4 As shown, the connecting assembly 2 includes a connecting rod 21 and two sleeves 22. The two sleeves 22 are respectively installed on the two storage tanks 1. The two ends of the connecting rod 21 are respectively inserted into the two sleeves 22. The two sleeves 22 are both installed with bolts 23 for fixing the connecting rod 21. When two storage tanks 1 need to be used, the two ends of the connecting rod 21 are respectively inserted into the two sleeves 22, and then the two ends of the connecting rod 21 are respectively fixed with bolts 23.

[0038] like Figures 1 to 4 As shown, an anti-skid pad 7 is bonded and installed on one end of the squeezing block 49 away from the connecting rod 21 ; the anti-skid pad 7 can increase the friction between itself and the fingers of the staff, thereby making it easier for the staff to push the squeezing block 49 .

[0039] like Figures 1 to 4 As shown, a feeding funnel 8 is installed on the top of the storage tank 1, and the feeding funnel 8 is threadedly connected to the top wall of the storage tank 1; when quartz sand is poured into the feeding funnel 8, the quartz sand can enter the storage tank 1 through the feeding funnel 8, so that the staff can easily add quartz sand to the storage tank 1.

[0040] The implementation principle of this embodiment is as follows: the staff freely selects one storage tank 1 or two storage tanks 1 according to the current production batch of quartz crucibles. If two storage tanks 1 are selected, the two ends of the connecting rod 21 are respectively inserted into the two sleeves 22, and then fixed with bolts 23. The staff can freely move the storage tank 1 by passing their fingers through the gripping piece 5. When unloading is required, the staff presses the squeezing block 49 with their fingers, and then slides the squeezing block 49. The sliding squeezing block 49 will push the connecting rod 46 to rotate with the connecting shaft 48 as the center of the circle. During the rotation of the connecting rod 46, the rack 44 will also be driven to rotate. The connecting shaft 48 moves as the center of the circle, and at the same time, the torsion spring 47 accumulates energy. During the movement of the rack 44, the gear 43 is driven to rotate. During the rotation of the gear 43, the transmission rod 45 and the second bevel gear 42 are driven to rotate synchronously. During the rotation of the second bevel gear 42, the first bevel gear 41 is driven to rotate. During the rotation of the first bevel gear 41, the rotating shaft 31 is driven to rotate. During the rotation of the rotating shaft 31, the sealing plate 32 is driven to rotate. At this time, the spring 36 is compressed, the discharge pipe 12 is opened, and the quartz sand in the storage tank 1 can fall through the discharge pipe 12. The equipment has a simple structure and is easy and convenient to operate.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation on the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the above-described technical content to make many possible changes and modifications to the present invention, or modify it into an equivalent embodiment with equivalent variations. Therefore, any changes, modifications, equivalent variations, and modifications made to the above embodiments based on the technology of the present invention that do not depart from the content of the present invention are within the scope of protection of the present invention.

Claims

1. A quantitative feeding device, characterized in that: The invention comprises two storage tanks (1), wherein the two storage tanks (1) are detachably connected via a connecting assembly (2), a scale line (11) is provided on the tank body of the storage tank (1), a discharge pipe (12) is provided at the bottom of the storage tank (1), and a control assembly (3) for controlling the opening and closing of the discharge pipe (12) is further provided at the bottom of the storage tank (1), wherein the control assembly (3) comprises a rotating shaft (31) and a blocking plate (32), wherein the rotating shaft (31) is rotatably provided at the bottom of the storage tank (1), one end of the blocking plate (32) is sleeved on the rotating shaft (31) and fixedly connected to the rotating shaft (31), and the discharge pipe (12) is connected to the bottom of the storage tank (1). (12) is provided with a mounting block (33), and a mounting groove (34) is provided on the mounting block (33) for facilitating the placement of the blocking plate (32). A fixing rod (35) is provided at the bottom of the storage tank (1) along the vertical direction, and a spring (36) is provided on the fixing rod (35), one end of the spring (36) is connected to the fixing rod (35), and the other end is connected to the blocking plate (32). A mounting box (15) is provided on the side wall of the storage tank (1), and a driving component (4) for driving the rotating shaft (31) to rotate is provided in the mounting box (15), and a gripping member (5) is provided on the outer wall of the mounting box (15).

2. A quantitative feeding device according to claim 1, characterized in that: The driving assembly (4) includes a first bevel gear (41), a second bevel gear (42), a gear (43), a rack (44), a transmission rod (45), a connecting rod (46) and a torsion spring (47), wherein the first bevel gear (41) is coaxially arranged on the top of the rotating shaft (31), the transmission rod (45) is rotatably arranged on the mounting box (15), the second bevel gear (42) is coaxially arranged on one end of the transmission rod (45), and the first bevel gear (41) is meshed with the second bevel gear (42). The gear (43) is coaxially arranged at the other end of the transmission rod (45), the connecting rod (46) is connected to one end of the rack (44), and the other end is provided with a connecting shaft (48), the connecting shaft (48) is rotatably arranged inside the installation box (15), the torsion spring (47) is sleeved on the connecting shaft (48), the rack (44) is meshed with the gear (43), and an extrusion block (49) is slidably provided on the installation box (15), and one end of the extrusion block (49) is in contact with the connecting rod (46).

3. A quantitative feeding device according to claim 1, characterized in that: A support ring (13) is provided on the tank body of the storage tank (1) in a sliding sleeve, and a plurality of support rods (14) are evenly arranged on the bottom of the support ring (13) along the vertical direction. A storage assembly (6) for accommodating the support rods (14) is provided on the side wall of the installation box (15).

4. A quantitative feeding device according to claim 3, characterized in that: The storage assembly (6) includes a sliding seat (61) and a sliding rod (62), wherein the sliding seat (61) is fixedly arranged on one side of the installation box (15) along the vertical direction, and the sliding rod (62) is horizontally penetrated on the sliding seat (61), and the sliding rod (62) is slidably connected to the sliding seat (61), one end of the sliding rod (62) is connected to the support ring (13), and the other end is provided with a positioning piece (63), and the sliding seat (61) is provided with a plurality of positioning holes (64) along its length direction, and the positioning piece (63) is provided with an insertion rod (65), and one end of the insertion rod (65) is inserted into the positioning hole (64).

5. A quantitative feeding device according to claim 1, characterized in that: The gripping member (5) is arranged on a side of the installation box (15) away from the storage tank (1), and a placement groove (51) for facilitating the placement of fingers is provided on the gripping member (5).

6. A quantitative feeding device according to claim 1, characterized in that: The connecting assembly (2) comprises a connecting rod (21) and two sleeves (22), wherein the two sleeves (22) are respectively arranged on the two storage tanks (1), and the two ends of the connecting rod (21) are respectively inserted into the two sleeves (22), and the two sleeves (22) are both provided with bolts (23) for fixing the connecting rod (21).

7. A quantitative feeding device according to claim 2, characterized in that: An anti-slip pad (7) is provided at one end of the extrusion block (49) away from the connecting rod (21).

8. The quantitative feeding device according to claim 1, characterized in that: A feeding funnel (8) is provided on the top of the storage tank (1), and the feeding funnel (8) is threadedly connected to the top wall of the storage tank (1).