Metering screw feeder with crushing function

Abstract

The utility model discloses a metering screw feeder with a crushing function. The metering screw feeder comprises a mounting rack, the feeding assembly is arranged in the mounting rack and comprises a spiral blade; the crushing assembly is arranged in the mounting rack and comprises a crushing part, one part of the axial projection of the crushing part coincides with the spiral blade, the coinciding areas are the same, and the radial projection of the crushing part does not intersect with the spiral blade. The crushing part is arranged on the material conveying path of the feeding assembly, so that materials can be in contact with the crushing part to be crushed into powder, and the plurality of spiral blades are arranged in parallel in the axis direction of the screw rod, so that the crushing part does not interfere with the rotation of the spiral blades while crushing the materials, and the crushing efficiency is improved. Therefore, the material conveying speed of the feeding assembly is ensured, the materials entering the discharging bin can be ensured to be powder, the weight of the materials in the mounting rack is ensured to be continuously changed, and the accuracy of weighing the powder materials is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing of powdery and bulk objects, and particularly relates to a metering screw feeder with a crushing function. Background Art

[0002] A screw feeder is a continuous conveying device widely used in the industrial field, especially suitable for the conveying of powdery and granular materials. It pushes the materials forward along the trough through the rotating screw blades, thereby realizing the continuous feeding of the materials. Among them, the screw feeder with weighing function becomes a metering screw feeder, which integrates conveying and precise metering. Compared with the ordinary screw feeder, it is equipped with a weighing sensor and a control system. It can continuously monitor and control the material flow while conveying the materials. The metering screw feeder can continuously measure the weight of the remaining materials in the trough through the weighing sensor, and then calculate the amount of materials output per unit time. At the same time, it adjusts the rotation speed of the screw blades through the control system to make the output speed of the materials match the preset feeding rate or the total feeding amount target.

[0003] The inventor of the present application found during the use of the existing metering screw feeder that the powdery and bulk materials conveyed in the trough are easily affected by the environmental humidity and agglomerate into blocks, or agglomerate into blocks under the extrusion of the screw blades. When the agglomerated materials are output from the trough, the measured weight change by the weighing sensor drops suddenly, and the weight change curve of the material output becomes a non-smooth curve, which makes it difficult for the control system to accurately control the output weight of the materials by controlling the rotation speed of the screw blades, and thus difficult to control the output speed of the materials, reducing the metering accuracy of the metering screw feeder. Summary of the Utility Model

[0004] In order to solve the problem that the materials conveyed by the metering screw feeder are prone to agglomerate into blocks, the utility model provides a metering screw feeder with a crushing function, and the specific technical solution is as follows:

[0005] A metering screw feeder with a crushing function includes a mounting frame forming a cavity; a feeding assembly arranged in the cavity, the feeding assembly includes at least two screw blades with coincident axes; and a crushing assembly arranged in the cavity, the crushing assembly includes at least one crushing part, at least a part of the projection of the crushing part along the axis direction of the screw blade coincides with the screw blade and the coincident area is the same, and the projection of the crushing part along the radial direction of the screw blade does not intersect with the screw blade.

[0006] Furthermore, the crushing assembly further includes at least one air pipe, one end of the air pipe communicating with the outside is at high pressure, one end of the air pipe communicating with the cavity is at low pressure, and an air flow flowing into the cavity is formed in the air pipe.

[0007] Furthermore, there is an included angle between the vent pipe and the spiral blades, and the airflow flowing through the vent pipe forms eddy currents in the gaps between the spiral blades.

[0008] Preferably, the length direction of the crushing assembly is the same as that of the feeding assembly, and the length of the feeding assembly is not less than that of the crushing assembly.

[0009] Preferably, the feeding assembly further includes a screw rod, one end of which is connected to a power member that outputs torque. The axis of the screw rod coincides with and is equal to the axis of the spiral blades, and the outer peripheral surface of the screw rod is connected to the inner peripheral surface of the spiral blades.

[0010] Preferably, the crushing member is a long column. One end of the long column is connected to the inner surface of the cavity, and the other end of the long column is closer to the spiral blades than the top end of the spiral blades, and the long column and the spiral blades do not contact each other.

[0011] Preferably, the crushing member is a filter screen that separates the spiral blades arranged side by side, and the diameter of the mesh holes of the filter screen is larger than the diameter of the materials conveyed by the feeding assembly.

[0012] Preferably, the installation frame further includes: a feed bin provided at the starting end of the conveying path of the feeding assembly, which forms a feed end; a discharge bin provided at the end of the conveying path of the feeding assembly, which forms a discharge end; and a material conveying bin that connects the sides of the feed bin and the discharge bin to form a cavity. The length direction of the material conveying bin is the same as that of the feeding assembly, and the length of the conveying bin is not greater than that of the feeding assembly. There is a gap between the outer surface of the feeding assembly and the inner surface of the material conveying bin, and the distance of this gap is less than the diameter of the materials conveyed by the feeding assembly.

[0013] From the above technical solutions, the present utility model has the following beneficial effects:

[0014] By arranging a crushing member on the path of the feeding assembly for conveying materials, the materials being conveyed can come into contact with the crushing member by themselves and be broken into powders. And by improving the original continuous spiral blades into multiple spiral blades parallel to the axis of the screw rod, the crushing member arranged in the gaps between the spiral blades does not interfere with the rotation of the spiral blades while crushing the materials. Furthermore, while ensuring the speed of the feeding assembly for conveying materials, it can also ensure that the materials entering the discharge bin are all powders, thereby ensuring that the weight of the materials in the installation frame changes continuously. This enables the operator to control the rotation speed of the screw rod through the control system to control the weight change of the materials, and further improves the accuracy of weighing powder materials of the present utility model. Description of the Drawings

[0015] Figure 1 It is a top view of the first embodiment of the present utility model;

[0016] Figure 2This is a schematic structural diagram of the first embodiment of the present utility model.

[0017] In the figure: 1, mounting frame; 2, feeding component; 3, crushing component; 11, feeding bin; 12, material conveying bin; 13, discharging bin; 14, cavity; 21, screw; 22, spiral blade; 31, crushing piece; 32, ventilation pipe. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0020] As Figure 1 shown, this embodiment includes a mounting frame 1 forming a cavity 14; a feeding component 2 arranged in the cavity 14, the feeding component 2 including at least two spiral blades 22 with coincident axes; and a crushing component 3 arranged in the cavity 14, the crushing component 3 including at least one crushing piece 31, at least a part of the projection of the crushing piece 31 along the axial direction of the spiral blade 22 coincides with the spiral blade 22 and the coincident areas are the same, and the projection of the crushing piece 31 along the radial direction of the spiral blade 22 does not intersect with the spiral blade 22.

[0021] Specifically, the mounting bracket forms a cavity 14 for wrapping the feeding component 2 and the crushing component 3, improving the operation safety of this embodiment. A plurality of spiral blades 22 with coincident axes are welded along the length direction of the feeding component 2, making the inclination angles of the leaf surfaces of the spiral blades 22 the same. When the spiral blade 22 rotates, the inclined leaf surface of the spiral blade 22 can push the material falling into the cavity 14 along its axial direction, and at the same time, rely on the mutual extrusion between the materials to transfer the material from the left spiral blade 22 to the right spiral blade 22. Here, the left and right sides are determined by the conveying direction of the feeding component 2.

[0022] Secondly, in the gaps of the spiral blades 22 of the crushing assembly 3, crushing members 31 are fixedly connected by welding or other means. The crushing members 31 are arranged on the feeding path of the material. When the material transitions from the left spiral blade 22 to the right spiral blade 22, the crushing members 31 crush the agglomerated material, and the crushed material then enters the right spiral blade 22. During this process, the installation position and dimensional requirements of the crushing members 31 should be such that they can crush the fed material without interfering with the rotating spiral blades 22. This enables the crushing members 31 to crush the material while not affecting the feeding of the material by the feeding assembly 2, thereby preventing the conveyed material from agglomerating into lumps. As a result, when the weighing sensor measures the weight of the material in the mounting bracket, there will be no sudden change, and the weight change curve will be a smooth curve. This allows the control system to adjust the conveying speed of the material by the feeding assembly 2 based on the weight data feedback by the weighing sensor, improving the metering accuracy of this embodiment.

[0023] As Figure 2 shown, the mounting bracket further includes a feed bin 11 provided at the starting end of the conveying of the feeding assembly 2, and the feed bin 11 has a feed end; a discharge bin 13 provided at the end of the conveying of the feeding assembly 2, and the discharge bin 13 has a discharge end; and a material conveying bin 12 that connects the sides of the feed bin 11 and the discharge bin 13 to form a cavity 14. The length direction of the material conveying bin 12 is the same as the length direction of the feeding assembly 2, and the length of the conveying bin is not greater than the length of the feeding assembly 2.

[0024] Specifically, the direction of the feeding assembly 2 for conveying the material is from left to right. In this embodiment, the top surface of the feed bin 11 is formed with an opening for the operator to input the material into the feeding assembly 2 from here. The opening position of the feed end can also be at other positions of the feed bin 11, as long as the height of the feed end relative to the ground is higher than the feeding assembly 2, so that the material can enter the spiral blade 22 of the feeding assembly 2 by free fall. The agglomerated material is crushed into powder by the crushing members 31 in the material conveying bin 12. The length of the feeding assembly 2 is at least longer than that of the material conveying bin 12, so that the material can be pushed by the spiral blade 22 into the discharge bin 13. In this embodiment, the discharge bin 13 is a hollow cylinder with openings at both the upper and lower ends. The upper opening is an operation opening for the operator to repair and inspect the discharge bin 13, and the lower opening is the discharge end for the material to enter the receiving container. Similarly, its height needs to ensure that the material can enter the receiving container by free fall, improving the smoothness of the material conveying in this embodiment.

[0025] Furthermore, there is a gap between the outer surface of the feeding assembly 2 and the inner surface of the material conveying bin 12, and the distance of this gap is smaller than the diameter of the material conveyed by the feeding assembly 2.

[0026] Specifically, the outer surface diameter of the feeding component 2 is the outer peripheral diameter of the spiral blade 22, that is, when the spiral blade 22 rotates, it is the maximum diameter of the area where its inclined leaf surface can push the material. The clearance distance is smaller than the material diameter, so that the feeding component 2 can push all the materials in the material conveying bin 12 from the feeding bin 11 to the discharging bin 13. As a result, no material can be stored in the clearance between the outer peripheral surface of the spiral blade 22 and the inner peripheral surface of the material conveying bin 12, thereby improving the material conveying efficiency and conveying quality, preventing different types of materials from being mixed together when weighing different types of materials in this embodiment, which may affect the weighing result, and reducing the cleanliness of the materials.

[0027] Furthermore, the feeding component 2 further includes a screw rod 21. One end of the screw rod 21 is connected to a power component that outputs torque. The axis of the screw rod 21 coincides with and is equal to the axis of the spiral blade 22, and the outer peripheral surface of the screw rod 21 is connected to the inner peripheral surface of the spiral blade 22.

[0028] Specifically, the screw rod 21 drives the spiral blade 22 to rotate, and the spiral blade 22 rotates to drive the material to move from left to right. The same axis of the two makes the spiral blade 22 not eccentric and vibrate during rotation, which may cause wear to the material conveying bin 12 and affect the conveying effect. Secondly, the outer peripheral surface of the screw rod 21 and the inner peripheral surface of the spiral blade 22 are tightly fixed together by welding, so that the material cannot leak from the joint between the two, affecting the conveying effect.

[0029] Furthermore, the crushing component 3 further includes at least one ventilation pipe 32. One end of the ventilation pipe 32 communicating with the outside is at high pressure, and one end of the ventilation pipe 32 communicating with the cavity 14 is at low pressure. The ventilation pipe 32 forms an air flow flowing into the cavity 14.

[0030] Specifically, the ventilation pipe 32 penetrates through the outside and the inside of the material conveying bin 12, so that the outside air can flow through the ventilation pipe 32 to the feeding component 2. In this embodiment, the installation position of the ventilation pipe 32 is the same as the installation position of the crushing part 31, and the installation quantity is the same. When the spiral blade 22 pushes the material forward, the air flow restricts its flow path through the ventilation pipe 32, enabling it to form a smaller contact surface with the material. Multiple ventilation pipes 32 simultaneously impact and crush the material, and they can assist the crushing part 31 to crush the agglomerated materials.

[0031] Furthermore, the ventilation pipe 32 forms an angle with the spiral blade 22, and an eddy current is formed in the gap of the spiral blade 22 by the air flow flowing through the ventilation pipe 32.

[0032] Specifically, the air flow in the ventilation pipe 32 impacts the leaf surface of the spiral blade 22 at an inclined angle, and its flow trajectory is blocked by the leaf surface and the outer peripheral surface of the screw rod 21 to form an eddy current. This eddy current can increase the impact surface of the air flow on the material, thereby improving the crushing effect of the air flow.

[0033] Meanwhile, as Figure 1 shown, the ventilation pipe 32 and the crushing member 31 are symmetrically distributed about the axis of the screw 21. Without interfering with the rotation of the spiral blade 22, it can improve the space utilization rate of the material conveying bin 12, thereby increasing the contact area between the crushing assembly 3 and the material, improving the crushing effect of the crushing assembly 3, and improving the metering accuracy of this embodiment.

[0034] Furthermore, the length direction of the crushing assembly 3 is the same as that of the feeding assembly 2, and the length of the feeding assembly 2 is not less than that of the crushing assembly 3.

[0035] Specifically, the distribution directions of the crushing member 31 and the ventilation pipe 32 are the same as that of the spiral blade 22, so that the crushing member 31 and the ventilation pipe 32 can always crush the material between the spiral blades 22, improving the crushing effect. Secondly, the feeding assembly 2 needs to convey the material from the feed bin 11 to the discharge bin 13, so its length needs to be greater than that of the material conveying bin 12, and its two ends respectively extend into the feed bin 11 and the discharge bin 13. However, the crushing assembly 3 only needs to be fixedly connected to the material conveying bin 12 to crush the material in the material conveying bin 12, saving manufacturing costs.

[0036] As Figure 1 shown, in this embodiment, the crushing member 31 is a long column. One end of the long column is connected to the inner surface of the cavity 14, and the other end of the long column is closer to the spiral blade 22 than the top end of the spiral blade 22, and the long column and the spiral blade 22 do not contact each other.

[0037] Specifically, one end of the long column is fixedly connected to the inner surface of the material conveying bin 12 by welding or bolting, so that the long column will not be deformed by the force exerted by the material during the contact with the material, affecting the crushing effect. Secondly, the distance between the other end surface of the long column and the outer peripheral surface of the screw is less than the distance between the top end of the spiral blade 22 and the screw, so that the long column can always contact the material conveyed between the spiral blades 22 and always play a crushing effect.

[0038] The difference between the second embodiment and the first embodiment lies in the different shape of the crushing member 31. In the second embodiment, the crushing member 31 is a filter screen, which separates the spiral blades 22 arranged side by side, and the mesh diameter of the filter screen is larger than the diameter of the material conveyed by the feeding assembly 2.

[0039] Specifically, the filter screen is fixed on the inner surface of the material feeding bin 12, perpendicular to the axis of the screw 21 and just within the gap of the spiral blade 22, so that the filter screen can isolate the spiral blades 22 without affecting their rotation, and the material conveyed by the spiral blades 22 must pass through the filter screen, improving the crushing effect of the crushing part 31. Secondly, the diameter of the mesh holes is larger than the diameter of the material, enabling the material to be conveyed through the mesh holes. However, the smaller the diameter of the mesh holes, the more difficult it is for the material to pass through, and the conveying speed of the material will decrease. In production, the diameter of the mesh holes is generally more than ten times the diameter of the material to ensure the crushing effect while increasing the conveying speed.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0041] The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A metering screw feeder with a crushing function, comprising a mounting frame (1) formed with a cavity (14), characterized in that: The metering screw feeder also includes: A feed assembly (2) disposed in the cavity (14), the feed assembly (2) comprising at least two spiral blades (22) whose axes coincide with each other; and A pulverizing assembly (3) is arranged in the cavity (14), the pulverizing assembly (3) comprising at least one pulverizing element (31), the projection of the pulverizing element (31) along the axial direction of the spiral blade (22) at least partially overlaps with the spiral blade (22) and the overlapping area is the same, and the projection of the pulverizing element (31) along the radial direction of the spiral blade (22) does not intersect with the spiral blade (22).

2. The metering screw feeder according to claim 1, characterized in that: The pulverizing assembly (3) further comprises at least one vent pipe (32), one end of the vent pipe (32) connected to the outside is at high pressure, and one end of the vent pipe (32) connected to the cavity (14) is at low pressure, and the vent pipe (32) forms an airflow that flows toward the cavity (14).

3. The metering screw feeder according to claim 2, characterized in that: The ventilation pipe (32) and the spiral blade (22) form an angle, and the airflow flowing through the ventilation pipe (32) forms a vortex in the gap between the spiral blades (22).

4. The metering screw feeder according to claim 1, characterized in that: The length direction of the crushing assembly (3) is the same as the length direction of the feeding assembly (2), and the length of the feeding assembly (2) is not less than the length of the crushing assembly (3).

5. The metering screw feeder according to claim 1, characterized in that: The feeding assembly (2) further comprises a screw (21), one end of which is connected to a power member for outputting torque, the axis of the screw (21) coincides with and is equal to the axis of the spiral blade (22), and the outer circumference of the screw (21) is connected to the inner circumference of the spiral blade (22).

6. The metering screw feeder according to claim 1, characterized in that: The crushing piece (31) is a long column, one end of which is connected to the inner surface of the cavity (14), and the other end of which is closer to the spiral blade (22) than the top end of the spiral blade (22), and the long column does not contact the spiral blade (22).

7. The metering screw feeder according to claim 1, characterized in that: The crushing element (31) is a filter screen, which separates the spiral blades (22) arranged side by side, and the mesh diameter of the filter screen is larger than the diameter of the material conveyed by the feeding component (2).

8. The metering screw feeder according to claim 1, characterized in that: The mounting frame (1) further comprises: A feed bin (11) is arranged at the conveying start end of the feed assembly (2), and the feed bin (11) is formed with a feed end; A discharge bin (13) is arranged at the conveying end of the feed assembly (2), and the discharge bin (13) is formed with a discharge end; and The sides of the feed bin (11) and the discharge bin (13) are connected to form a feed bin (12), the interior of the feed bin (12) forms the cavity (14), the length direction of the feed bin (12) is the same as the length direction of the feed assembly (2), and the length of the feed bin is not greater than the length of the feed assembly (2).

9. The metering screw feeder according to claim 8, characterized in that: There is a gap between the outer surface of the feeding component (2) and the inner surface of the feeding bin (12), and the distance of the gap is smaller than the diameter of the material transported by the feeding component (2).

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