Vibrating screening device and powder production line with same

Abstract

The utility model provides a vibration screening device and a powder production line with the vibration screening device. The screening assembly is arranged on the base in a vibrating manner; the driving part is arranged on the base and is in driving fit with the screening assembly; the first end of the transmission shaft is connected with the driving piece, and the middle of the transmission shaft is rotatably connected with the screening assembly; the first transmission part is arranged on the screening assembly, and the periphery of the transmission shaft is sleeved with the first transmission part; the first balance weight part is arranged on the transmission shaft and located outside the screening assembly; the second balance weight part is arranged on the transmission shaft and located in the screening assembly; a first preset interval is formed between the first transmission part and the transmission shaft. According to the technical scheme, the problem that the quality of milk powder is affected due to the fact that the vibration amplitude of a vibration screen is small in the related technology is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration equipment, in particular to a vibration screening device and a powder production line having the same. Background Art

[0002] During the production process of milk powder, multiple particles of normal particle size may stick together to form larger particles. Paste powder may also appear. Paste powder is in block form. Large particles and paste powder are mixed in normal milk powder. In order to separate large particles and paste powder from normal milk powder, a vibrating screen is required.

[0003] In the prior art, the vibrating screen includes a driving structure, a vibrating screen body, and a screening mesh arranged on the vibrating screen body. When the milk powder needs to be screened, the driving structure drives the screening mesh to vibrate. However, during the screening process, in order to avoid a large amount of material being discharged from the large particle discharge port, the large particle discharge port needs to be closed. This will cause large-particle milk powder and paste powder to accumulate on the screening mesh. Due to the limitations of the vibrating screen's own performance, even if the vibration amplitude of the screening mesh is adjusted to the maximum, normal milk powder will still not be able to be quickly separated from some particles with larger particle sizes and paste powder. When particles with larger particle sizes and paste powder stay on the screening mesh for a long time, friction will occur between the screening mesh, which will cause the larger particles and paste powder to be broken, and the normal milk powder will flow out, affecting the quality of the milk powder. Utility Model Content

[0004] The main purpose of the utility model is to provide a vibration screening device and a powder production line having the same, so as to solve the problem in the related art that the quality of milk powder is affected due to the small vibration amplitude of the vibration screen.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a vibrating screening device is provided, including: a base; a screening assembly, which is vibrably arranged on the base; a driving member, which is arranged on the base and cooperates with the driving of the screening assembly; a transmission shaft, the first end of the transmission shaft is connected to the driving member, and the middle part of the transmission shaft is rotatably connected to the screening assembly; a first transmission member, the first transmission member is arranged on the screening assembly, and the first transmission member is sleeved on the outer periphery of the transmission shaft; a first counterweight, the first counterweight is arranged on the transmission shaft and is located outside the screening assembly; a second counterweight, the second counterweight is arranged on the transmission shaft and is located inside the screening assembly; wherein, there is a first preset interval between the first transmission member and the transmission shaft.

[0006] Further, the first transmission member includes a first bearing, and a first preset interval is formed between an inner hole of the first bearing and an outer periphery of the transmission shaft, and the first preset interval is between 0.05 mm and 0.06 mm.

[0007] Furthermore, the screening assembly includes a mounting seat and a screen structure arranged on the mounting seat, a first mounting hole is arranged on the mounting seat, the axis of the first mounting hole is arranged parallel to the axis of the mounting seat, a first bearing is arranged in the first mounting hole, and a second preset interval is provided between the outer circle of the first bearing and the inner wall of the first mounting hole.

[0008] Furthermore, the second preset interval is between 0.03 mm and 0.04 mm.

[0009] Furthermore, a second mounting hole is provided on the mounting seat, the first mounting hole and the second mounting hole are spaced apart in an upper and lower direction, the axis of the second mounting hole and the axis of the first mounting hole are colinearly arranged, and the vibration screening device also includes a second transmission member arranged in the second mounting hole, and the second transmission member is sleeved on the outer periphery of the transmission shaft.

[0010] Further, the second transmission member includes a second bearing, and the first bearing is arranged between the second bearing and the first counterweight; there is a third preset interval between the inner hole of the second bearing and the outer periphery of the transmission shaft, and the third preset interval is between 0.05mm and 0.06mm, and / or, there is a fourth preset interval between the outer circle of the second bearing and the inner wall of the second mounting hole, and the fourth preset interval is between 0.03mm and 0.04mm.

[0011] Furthermore, the vibration screening device also includes a vibration damping structure, which is arranged between the screening assembly and the base. The vibration damping structure includes a plurality of vibration damping rubber piers arranged at intervals, and the hardness value of each vibration damping rubber pier is between 50HA and 70HA.

[0012] Furthermore, the screen structure includes an outer shell and a screen member arranged in the outer shell, the screen member divides the internal space of the outer shell into a first accommodating space and a second accommodating space, the first accommodating space is connected to the second accommodating space, and the second accommodating space is arranged below the first accommodating space. The screen structure also includes a first discharge port and a second discharge port, the first discharge port is arranged on the side wall of the outer shell and corresponds to the bottom of the first accommodating space, and the second discharge port is arranged on the side wall of the outer shell and corresponds to the bottom of the second accommodating space.

[0013] Furthermore, a guide portion is provided on the bottom wall of the shell, and the cross-sectional area of ​​the guide portion gradually increases in the direction from the shell to the mounting seat.

[0014] According to another aspect of the utility model, a powder production line is provided, comprising a vibration screening device, and the vibration screening device is the above-mentioned vibration screening device.

[0015] According to the technical solution of the utility model, a screening assembly and a driving member are arranged on the base, and the screening assembly can be arranged in a vibrating manner. The driving member is driven and matched with the screening assembly. The first end of the transmission shaft is connected to the driving member, and the middle part of the transmission shaft is rotatably connected to the screening assembly. The first transmission member is arranged on the screening assembly, and the first transmission member is sleeved on the outer periphery of the transmission shaft. The first counterweight member and the second counterweight member are arranged on the transmission shaft at intervals, the first counterweight member is located outside the screening assembly, and the second counterweight member is located inside the screening assembly. There is a first preset interval between the first transmission member and the transmission shaft. Through the above arrangement, the base can support the screening assembly and the driving member. The driving member can drive the transmission shaft to rotate, and when the transmission shaft rotates, it can drive the first counterweight member and the second counterweight member to rotate. The exciting force generated when the first counterweight member and the second counterweight member rotate can be transmitted to the screening assembly through the first transmission member, so that the screening assembly can vibrate, and then the screening assembly can screen the material. The first counterweight member can generate a horizontal exciting force, and the second counterweight member can generate a vertical exciting force, so that the screening assembly can screen the material. There is a first preset interval between the first transmission member and the transmission shaft, so that when the transmission shaft rotates, it can drive the first counterweight member and the second counterweight member to rotate to generate a larger exciting force, which is transmitted to the screening component through the first transmission member, so that the screening component can have a larger amplitude, so that different components in the material can be separated from each other. Therefore, the technical solution of the present application effectively solves the problem in the related art that the quality of milk powder is affected by the small vibration amplitude of the vibrating screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic cross-sectional view of an embodiment of a vibrating screening device according to the utility model is shown;

[0018] Figure 2 Shows Figure 1 A partial enlarged schematic diagram of the vibrating screening device at point A;

[0019] Figure 3 Shows Figure 2 A partial enlarged schematic diagram of location B of the vibrating screening device;

[0020] Figure 4 Shows Figure 1 Schematic diagram of the three-dimensional structure of the connection between the transmission shaft, the first counterweight and the second counterweight of the vibrating screening device.

[0021] The above drawings include the following reference numerals:

[0022] 10. Base; 20. Screening assembly; 21. Mounting seat; 211. First mounting hole; 212. Second mounting hole; 22. Screen structure; 221. Shell; 2211. First accommodating space; 2212. Second accommodating space; 2213. Guide portion; 222. Screen member; 223. First discharge port; 224. Second discharge port; 30. Driving member; 40. Transmission shaft; 50. First transmission member; 51. First bearing; 60. First counterweight; 70. Second counterweight; 80. Second transmission member; 81. Second bearing; 90. Vibration reduction structure; 91. Vibration reduction rubber pier. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0026] like Figure 1 and Figure 2As shown, the vibrating screening device of this embodiment includes: a base 10, a screening assembly 20, a driving member 30, a transmission shaft 40, a first transmission member 50, a first counterweight member 60 and a second counterweight member 70. The screening assembly 20 can be vibrated on the base 10. The driving member 30 is arranged on the base 10 and is driven and matched with the screening assembly 20. The first end of the transmission shaft 40 is connected to the driving member 30, and the middle part of the transmission shaft 40 is rotatably connected to the screening assembly 20. The first transmission member 50 is arranged on the screening assembly 20, and the first transmission member 50 is sleeved on the outer periphery of the transmission shaft 40. The first counterweight member 60 is arranged on the transmission shaft 40 and is located outside the screening assembly 20. The second counterweight member 70 is arranged on the transmission shaft 40 and is located inside the screening assembly 20. Among them, there is a first preset interval between the first transmission member 50 and the transmission shaft 40.

[0027] Applying the technical solution of this embodiment, a screening assembly 20 and a driving member 30 are provided on the base 10, and the screening assembly 20 can be vibrated. The driving member 30 is driven and matched with the screening assembly 20. The first end of the transmission shaft 40 is connected to the driving member 30, and the middle part of the transmission shaft 40 is rotatably connected to the screening assembly 20. The first transmission member 50 is provided on the screening assembly 20, and the first transmission member 50 is sleeved on the outer periphery of the transmission shaft 40. The first counterweight 60 and the second counterweight 70 are arranged on the transmission shaft at intervals, the first counterweight 60 is located outside the screening assembly 20, and the second counterweight 70 is located inside the screening assembly 20. There is a first preset interval between the first transmission member 50 and the transmission shaft 40. Through the above-mentioned arrangement, the base 10 can support the screening assembly 20 and the driving member 30. The driving member 30 can drive the transmission shaft 40 to rotate, and when the transmission shaft 40 rotates, it can drive the first counterweight 60 and the second counterweight 70 to rotate. The exciting force generated when the first counterweight 60 and the second counterweight 70 rotate can be transmitted to the screening assembly 20 through the first transmission member 50, so that the screening assembly 20 can vibrate, and then the screening assembly 20 can screen the material. The first counterweight 60 can generate a vertical exciting force, and the second counterweight 70 can generate a horizontal exciting force, so that the screening assembly 20 can screen the material. There is a first preset interval between the first transmission member 50 and the transmission shaft 40, so that when the transmission shaft 40 rotates, it can drive the first counterweight 60 and the second counterweight 70 to rotate, and can generate a larger exciting force, and transmit it to the screening assembly 20 through the first transmission member 50, so that the screening assembly 20 can have a larger amplitude, so that different components in the material can be separated from each other. Therefore, the technical solution of this embodiment effectively solves the problem in the related art that the quality of milk powder is affected by the small vibration amplitude of the vibrating screen.

[0028] It should be noted that in this embodiment, the material refers to normal milk powder, and the different components in the material refer to large-particle milk powder and aleurone mixed in the milk powder. The particle sizes of large-particle milk powder and aleurone are larger than normal milk powder. The vibration screening device in this embodiment is a vibration screen.

[0029] Specifically, Figure 4 As shown, the first counterweight 60 includes a mounting plate, a first counterweight block arranged above the mounting plate, a second counterweight block arranged below the mounting plate, and an indicator rod, and the mounting plate and the first counterweight block are both connected to the transmission shaft 40. The second counterweight 70 includes a third counterweight block. The mounting plate is provided with a plurality of scale values, and the indicator rod cooperates with one of the plurality of scale values ​​to indicate the weight of the third counterweight block.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the first transmission member 50 includes a first bearing 51, and a first preset interval is formed between the inner hole of the first bearing 51 and the outer periphery of the transmission shaft 40, and the first preset interval is between 0.05 mm and 0.06 mm. The first bearing 51 enables the transmission shaft 40 to rotate relative to the screening assembly 20. The first preset interval is between 0.05 mm and 0.06 mm, so that the transmission shaft 40 can drive the first counterweight 60 and the second counterweight 70 to generate a greater exciting force when rotating.

[0031] Specifically, the first preset interval may be 0.05 mm, 0.055 mm or 0.06 mm.

[0032] like Figure 1 As shown, in this embodiment, the screening assembly 20 includes a mounting seat 21 and a screen structure 22 arranged on the mounting seat 21, a first mounting hole 211 is arranged on the mounting seat 21, the axis of the first mounting hole 211 is arranged parallel to the axis of the mounting seat 21, a first bearing 51 is arranged in the first mounting hole 211, and a second preset interval is provided between the outer circle of the first bearing 51 and the inner wall of the first mounting hole 211. The mounting seat 21 can support the first bearing 51 and the screen structure 22. The exciting force generated when the transmission shaft 40 drives the first counterweight 60 and the second counterweight 70 to rotate can be transmitted to the mounting seat 21 through the first bearing 51, and then can be transmitted to the screen structure 22. The second preset interval makes the amplitude of the screen structure 22 larger.

[0033] like Figure 2 As shown, in this embodiment, the second preset interval is between 0.03 mm and 0.04 mm. The above arrangement enables the transmission shaft 40 to generate a greater exciting force when driving the first counterweight 60 and the second counterweight 70 to rotate.

[0034] Specifically, the second preset interval may be 0.03 mm, 0.035 mm or 0.04 mm.

[0035] like Figure 1 and Figure 3 As shown, in this embodiment, the mounting seat 21 is further provided with a second mounting hole 212, the first mounting hole 211 and the second mounting hole 212 are arranged at intervals up and down, the axis of the second mounting hole 212 and the axis of the first mounting hole 211 are arranged colinearly, and the vibration screening device further includes a second transmission member 80 arranged in the second mounting hole 212, and the second transmission member 80 is sleeved on the outer periphery of the transmission shaft 40. The exciting force generated when the transmission shaft 40 drives the first counterweight 60 and the second counterweight 70 to rotate can be transmitted to the mounting seat through the second transmission member 80, and then transmitted to the screen structure 22, so that the screen structure 22 can vibrate.

[0036] like Figure 3 As shown, in this embodiment, the second transmission member 80 includes a second bearing 81, and the first bearing 51 is arranged between the second bearing 81 and the first counterweight 60. There is a third preset interval between the inner hole of the second bearing 81 and the outer periphery of the transmission shaft 40, and the third preset interval is between 0.05mm and 0.06mm. There is a fourth preset interval between the outer circle of the second bearing 81 and the inner wall of the second mounting hole 212, and the fourth preset interval is between 0.03mm and 0.04mm. The above-mentioned arrangement enables the transmission shaft 40 to generate a larger exciting force when driving the first counterweight 60 and the second counterweight 70 to rotate, and transmit it to the mounting seat 21 through the second bearing 81, so that the mounting seat 21 can generate a larger amplitude.

[0037] Specifically, the third preset interval may be 0.05 mm, 0.055 mm or 0.06 mm. The fourth preset interval may be 0.03 mm, 0.035 mm or 0.04 mm.

[0038] It should be noted that the first preset interval of the present embodiment is achieved by removing part of the material of the inner hole of the first bearing 51, the second preset interval is achieved by removing part of the material of the outer circle of the first bearing 51, the third preset interval is achieved by removing part of the material of the inner hole of the second bearing 81, and the fourth preset interval is achieved by removing part of the material of the outer circle of the second bearing 81. This prevents damage to the mounting seat 21, and the first bearing 51 and the second bearing 81 are easy to replace, and material removal is simpler. Removing part of the material of the first bearing 51 and removing part of the material of the second bearing 81 can be achieved by grinding.

[0039] like Figure 1As shown, in this embodiment, the vibration screening device also includes a vibration reduction structure 90, which is arranged between the screening component 20 and the base 10. The vibration reduction structure 90 includes a plurality of vibration reduction rubber piers 91 arranged at intervals, and the hardness value of each vibration reduction rubber pier 91 is between 50HA and 70HA. Through the above-mentioned arrangement, when the screening component 20 moves toward the base 10, the plurality of vibration reduction rubber piers 91 can slow down the movement of the screening component 20, which can not only enable the screening component 20 to screen effectively, but also avoid the screening component 20 from colliding with the base 10. The hardness value of each vibration reduction rubber pier 91 is between 50HA and 70HA, so that the vibration reduction rubber pier 91 can effectively reduce vibration and reduce the probability of damage to the vibration reduction rubber pier 91.

[0040] Preferably, in this embodiment, the hardness value of each vibration-damping rubber pier 91 is between 55HA and 65HA, and can be 55HA, 60HA or 65HA. HA represents the hardness measured by a Shore A hardness tester. A plurality of vibration-damping rubber piers 91 are evenly distributed and located on the outside of the transmission shaft 40.

[0041] like Figure 1 As shown, in this embodiment, the screen structure 22 includes a shell 221 and a screen member 222 disposed in the shell 221. The screen member 222 divides the internal space of the shell 221 into a first accommodating space 2211 and a second accommodating space 2212. The first accommodating space 2211 is connected to the second accommodating space 2212, and the second accommodating space 2212 is disposed below the first accommodating space 2211. The screen structure 22 also includes a first discharge port 223 and a second discharge port 224. The first discharge port 223 is disposed on the side wall of the shell 221 and corresponds to the bottom of the first accommodating space 2211. The second discharge port 224 is disposed on the side wall of the shell 221 and corresponds to the bottom of the second accommodating space 2212. The shell 221 can support the screen member 222. The first accommodating space 2211 and the second accommodating space 2212 can accommodate materials, and the shell 221 can protect the materials in the first accommodating space 2211 and the second accommodating space 2212. The second accommodating space 2212 can accommodate materials dropped from the first accommodating space 2211 through the screen member 222. The first discharge port 223 allows part of the materials dropped into the second accommodating space 2212 without passing through the screen member 222 to move to the outside of the housing 221. The second discharge port 224 allows the materials dropped into the second accommodating space 2212 to move to the outside of the housing 221.

[0042] It should be noted that the large-particle milk powder and paste powder move to the outside of the housing 221 through the first discharge port 223 , that is, the first discharge port corresponds to the large-particle discharge port in the prior art. Normal milk powder moves to the outside of the housing 221 through the second discharge port 224 .

[0043] like Figure 1 As shown, in this embodiment, a guide portion 2213 is provided on the bottom wall of the housing 221, and the cross-sectional area of ​​the guide portion 2213 gradually increases in the direction from the housing 221 to the mounting seat 21. The material falling into the second accommodating space 2212 can be gradually moved to the second discharge port 224 under the action of the guide portion 2213.

[0044] It is currently described that the guide portion 2213 includes a guide cone and an avoidance platform, and the avoidance platform is arranged on a side of the guide cone facing the screen member.

[0045] When the vibrating screen in the prior art is in use, the large particle discharge port must be kept closed because the large particle discharge port discharges more materials, because after opening, normal milk powder will also be discharged from the large particle discharge port. However, the closure of the large particle discharge port will result in the large particle milk powder and aleurone powder being unable to be effectively discharged, and they will stay on the vibrating screen for a long time, which may cause the risk of breaking. Even if the amplitude of the vibrating screen is adjusted to the maximum, it is still impossible to ensure that the large particle milk powder and aleurone powder are quickly separated from the normal milk powder. Therefore, the vibration screening device of this embodiment sets the first preset interval, the second preset interval, the third preset interval and the fourth preset interval, so that the transmission shaft 40 can generate a greater exciting force when driving the first counterweight 60 and the second counterweight 70 to rotate, and then the screen member 222 can generate a larger amplitude, so that the large-particle milk powder and paste powder can be separated from the normal milk powder more quickly, avoiding the accumulation of materials on the screen member 222, and also avoiding the small amplitude of the vibrating screen in the prior art, which causes the large-particle milk powder and paste powder to stay on the screen for a long time, and after friction with the screen, they are broken, mixed into the normal milk powder and move with the normal milk powder.

[0046] The vibration screening device of this embodiment can achieve a guide angle of 40° to 60° by adjusting the first preset interval, the second preset interval, the third preset interval and the fourth preset interval to increase the amplitude and frequency of the screening component 20 and improve the motion trajectory, so that large-particle milk powder and paste powder can be discharged smoothly from the slag discharge port, and a large amount of material will not be discharged from the slag discharge port. At the same time, a large amount of milk powder will not accumulate on the screen element 222, thereby improving the screening efficiency. The screening effect is improved without destroying the structure of the original vibration screen, and the replacement cost of equipment procurement is saved. The daily replacement cost of the vibration screen is estimated to be around 200,000 to 300,000 yuan. The cost of optimization according to this method is around 20,000 to 30,000 yuan, and the cost is saved by 10%. The screening device of this embodiment can adjust the horizontal vibration amount, which has very important practical application significance.

[0047] The vibrating screening device of this embodiment does not discharge a large amount of material at the first discharge port 223. According to measured data, only 122 grams of large-particle milk powder and paste powder are discharged from 9 tons of material, which greatly improves the use of the vibrating screening device. At the same time, there is basically no dust accumulation on the screen element 222, and the use effect is good.

[0048] like Figures 1 to 4 As shown, the powder production line of this embodiment includes a vibrating screening device, and the vibrating screening device is the above-mentioned vibrating screening device. When the above-mentioned vibrating screening device is used, it can generate a larger amplitude, thereby enabling different components in the material to be effectively separated. The powder production line with the above-mentioned vibrating screening device also has the above-mentioned advantages.

[0049] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vibrating screening device, characterized in that: include: Base (10); A screening assembly (20) is vibrably arranged on the base (10); A driving member (30) is disposed on the base (10) and is drivingly matched with the screening assembly (20); a transmission shaft (40), wherein a first end of the transmission shaft (40) is connected to the driving member (30), and a middle portion of the transmission shaft (40) is rotatably connected to the screening assembly (20); A first transmission member (50), wherein the first transmission member (50) is disposed on the screening assembly (20), and the first transmission member (50) is sleeved on the outer periphery of the transmission shaft (40); a first counterweight (60), the first counterweight (60) being disposed on the transmission shaft (40) and located outside the screening assembly (20); a second counterweight (70), the second counterweight (70) being disposed on the transmission shaft (40) and located inside the screening assembly (20); Wherein, there is a first preset interval between the first transmission member (50) and the transmission shaft (40).

2. The vibrating screening device according to claim 1, characterized in that: The first transmission member (50) comprises a first bearing (51), and the first preset interval is formed between the inner hole of the first bearing (51) and the outer periphery of the transmission shaft (40), and the first preset interval is between 0.05 mm and 0.06 mm.

3. The vibrating screening device according to claim 2, characterized in that: The screening assembly (20) comprises a mounting seat (21) and a screen structure (22) arranged on the mounting seat (21); a first mounting hole (211) is arranged on the mounting seat (21); an axis of the first mounting hole (211) is arranged parallel to an axis of the mounting seat (21); the first bearing (51) is arranged in the first mounting hole (211); and a second preset interval is provided between an outer circle of the first bearing (51) and an inner wall of the first mounting hole (211).

4. The vibrating screening device according to claim 3, characterized in that: The second preset interval is between 0.03 mm and 0.04 mm.

5. The vibrating screening device according to claim 3, characterized in that: The mounting seat (21) is also provided with a second mounting hole (212), the first mounting hole (211) and the second mounting hole (212) are arranged at an interval up and down, the axis of the second mounting hole (212) and the axis of the first mounting hole (211) are arranged colinearly, and the vibration screening device further comprises a second transmission member (80) arranged in the second mounting hole (212), and the second transmission member (80) is sleeved on the outer periphery of the transmission shaft (40).

6. The vibrating screening device according to claim 5, characterized in that: The second transmission member (80) comprises a second bearing (81), the first bearing (51) is arranged between the second bearing (81) and the first counterweight (60); there is a third preset interval between the inner hole of the second bearing (81) and the outer periphery of the transmission shaft (40), and the third preset interval is between 0.05 mm and 0.06 mm, and / or there is a fourth preset interval between the outer circle of the second bearing (81) and the inner wall of the second mounting hole (212), and the fourth preset interval is between 0.03 mm and 0.04 mm.

7. The vibrating screening device according to any one of claims 1 to 6, characterized in that: The vibration screening device further comprises a vibration damping structure (90), wherein the vibration damping structure (90) is arranged between the screening assembly (20) and the base (10), and the vibration damping structure (90) comprises a plurality of vibration damping rubber piers (91) arranged at intervals, and the hardness value of each vibration damping rubber pier (91) is between 50HA and 70HA.

8. The vibrating screening device according to any one of claims 3 to 6, characterized in that: The sieve structure (22) comprises an outer shell (221) and a sieve member (222) arranged in the outer shell (221); the sieve member (222) divides the internal space of the outer shell (221) into a first accommodating space (2211) and a second accommodating space (2212); the first accommodating space (2211) is connected to the second accommodating space (2212); the second accommodating space (2212) is arranged below the first accommodating space (2211); the sieve structure (22) further comprises a first discharge port (223) and a second discharge port (224); the first discharge port (223) is arranged on the side wall of the outer shell (221) and corresponds to the bottom of the first accommodating space (2211); the second discharge port (224) is arranged on the side wall of the outer shell (221) and corresponds to the bottom of the second accommodating space (2212).

9. The vibrating screening device according to claim 8, characterized in that: A guide portion (2213) is provided on the bottom wall of the outer shell (221), and the cross-sectional area of ​​the guide portion (2213) gradually increases in the direction from the outer shell (221) to the mounting seat (21).

10. A powder production line, comprising a vibrating screening device, characterized in that: The vibrating screening device is the vibrating screening device according to any one of claims 1 to 9.

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