Raw material screening device for preparing BDO

Abstract

The utility model discloses a raw material screening device for preparing BDO. The raw material screening device comprises a screening frame, a first screening plate, a second screening plate, a third screening plate and an intermittent feeding assembly, wherein the first screening plate, the second screening plate and the third screening plate are sequentially installed on the inner side of the screening frame from top to bottom, and the intermittent feeding assembly is installed at the top of the screening frame. The intermittent feeding assembly comprises a material distributing round frame fixed to the top of the screening frame, a material containing frame fixed to the top of the material distributing round frame and a first servo motor fixed to the front face of the material distributing round frame. After to-be-screened BDO solid raw materials are placed in the discharging frame, through cooperation of a first servo motor, a first rotating rod, a plurality of material distributing blades and a material distributing round frame, the raw materials can achieve the intermittent feeding effect of different degrees only by controlling the rotating speed of the material distributing blades, and the situation that when the raw materials are poured continuously, the screening force of a screen plate is limited, and the screening efficiency is improved is avoided. And therefore, the screening speed is effectively increased, and the working efficiency and practicability of the screening machine are improved.

Description

Technical Field

[0001] This utility model relates to the field of materials processing technology, and in particular to a raw material screening device for BDO preparation. Background Technology

[0002] 1,4-Butanediol (BDO), an important raw material for organic and fine chemicals, is a colorless or pale yellow oily liquid. It is soluble in methanol, ethanol, and acetone, and slightly soluble in diethyl ether. It is characterized by its flammability and high solubility. During production, solid raw materials need to be graded and separated according to particle size to ensure that the raw materials entering subsequent production processes meet certain particle size requirements, thereby improving production efficiency and optimizing product quality.

[0003] Chinese utility model patent CN220514694U discloses a screening device for chemical raw materials. In the screening process, the raw material is poured into the screening box through the inlet. A vibrating motor drives the screening box to vibrate, and the material is screened through multiple screen plates. After screening, raw materials of different particle sizes are collected through different outlets. If the inclination angle of the screen plates is unsuitable during screening—too large or too small—the screw can be turned by handwheel, which in turn drives the adjusting rope along the first and second pulleys to raise or lower the output end of the screen plates. This allows for synchronous adjustment of the inclination angle of multiple screen plates. This utility model can adjust the screen surface angle according to the actual characteristics of the raw material to improve screening precision.

[0004] However, in actual use, when raw materials are continuously poured into the screen plate through the feed inlet, it is very easy for new raw materials to be poured into the top of the screen plate before the raw materials on the screen plate have been completely screened. This results in excessive raw materials accumulating at the top of the screen plate, which slows down the screening process and reduces the working efficiency of the equipment. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a raw material screening device for BDO preparation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a raw material screening device for BDO preparation, comprising: a screening frame, a first screen plate, a second screen plate and a third screen plate installed sequentially from top to bottom inside the screening frame, and an intermittent feeding assembly installed on the top of the screening frame;

[0007] The intermittent feeding assembly includes: a material distribution circular frame fixed to the top of the screening frame, a material discharge frame fixed to the top of the material distribution circular frame, and a first servo motor fixed to the front of the material distribution circular frame; a first rotating rod is fixed to the output end of the first servo motor, and a plurality of material distribution blades are fixed to the side of the first rotating rod.

[0008] The surfaces of the first sieve plate and the second sieve plate are provided with a plurality of screening holes. The sides of the first sieve plate, the second sieve plate and the third sieve plate are provided with buffer connection components for elastic support on the contact surfaces with the inner wall of the screening frame. The bottom of the first sieve plate, the second sieve plate and the third sieve plate are provided with vibration mechanisms for intermittently hammering their bottoms to make them vibrate.

[0009] In a preferred embodiment of this utility model, the interior of the material distribution frame is connected to the interior of the material feeding frame and the screening frame, respectively; the sides of the first rotating rod near both ends are rotatably connected to the inner side of the material distribution frame; a plurality of material distribution blades are evenly distributed circumferentially on the sides of the first rotating rod, and the sides are in contact with the inner side of the material distribution frame.

[0010] In a preferred embodiment of the present invention, the first sieve plate, the second sieve plate, and the third sieve plate are all inclinedly arranged inside the screening frame, and the diameter of the screening holes on the surface of the first sieve plate is larger than the diameter of the screening holes on the surface of the second sieve plate.

[0011] In a preferred embodiment of the present invention, a plurality of discharge frames are fixed on one side of the screening frame, and are respectively facing the inclined bottom ends of the first screen plate, the second screen plate and the third screen plate.

[0012] In a preferred embodiment of the present invention, the buffer connection assembly includes: a plurality of movable grooves formed inside the screening frame, a plurality of connecting blocks respectively fixed to the sides of the first screen plate, the second screen plate and the third screen plate, and buffer springs fixed to the top and bottom of the connecting blocks; one end of the buffer spring is fixed to the inner side of the movable groove.

[0013] In a preferred embodiment of the present invention, the vibration mechanism includes: a plurality of second rotating rods rotatably connected to the inner side of the screening frame, a plurality of cams fixed to the sides of the plurality of second rotating rods, and a power assembly installed on the back of the screening frame for driving the plurality of second rotating rods to rotate; the plurality of second rotating rods are respectively located at the bottom of the first screen plate, the second screen plate and the third screen plate.

[0014] In a preferred embodiment of the present invention, the power assembly includes: a second servo motor fixed to the top of the screening frame, an active synchronous pulley fixed to the output end of the second servo motor, and a plurality of driven synchronous pulleys fixed to one end of the back of the screening frame of a plurality of second rotating rods; a first toothed belt meshes between the active synchronous pulley and the driven synchronous pulleys, and a second toothed belt meshes between the plurality of driven synchronous pulleys.

[0015] In a preferred embodiment of the present invention, the front of the sieving frame is provided with several observation windows for observing the internal condition of the sieving frame.

[0016] In a preferred embodiment of this utility model, the bottom of the screening frame is equipped with several casters for easy movement of the whole frame.

[0017] In a preferred embodiment of the present invention, the bottom of the screening frame is provided with a plurality of support feet for providing stable support to the screening frame.

[0018] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0019] (1) This utility model provides a raw material screening device for BDO preparation. By installing an intermittent feeding component on the top of the screening frame, the solid BDO raw material to be screened is placed inside the feeding frame. Through the cooperation of the first servo motor, the first rotating rod, several distributing blades and the distributing circular frame, only the rotation speed of several distributing blades needs to be controlled to achieve different degrees of intermittent feeding effect of the raw material. This avoids the situation where the screening force of the screen plate is limited when the raw material is continuously poured in, resulting in excessive accumulation of raw material on the top of the screen plate. This effectively improves the screening rate and enhances its working efficiency and practicality.

[0020] (2) In this utility model, buffer connection components are provided on the contact surfaces between the sides of the first screen plate, the second screen plate and the inner wall of the screening frame. When the vibration mechanism causes the bottom of the first screen plate, the second screen plate and the third screen plate to vibrate, the elastic support can be achieved through the cooperation of several connecting blocks, several movable grooves and buffer springs. This allows the first screen plate, the second screen plate and the third screen plate to receive the vertical force of their vibration, thereby improving the effect of vibration screening.

[0021] (3) In this utility model, by setting a vibration mechanism at the bottom of the first screen plate, the second screen plate and the third screen plate, with the cooperation of the power component, several second rotating rods and several cams, the convex end of the cam can intermittently hammer the bottom of the first screen plate, the second screen plate and the third screen plate, thereby achieving the purpose of vibration. Only by adjusting the rotation speed of the cam, the vibration frequency of the first screen plate, the second screen plate and the third screen plate can be controlled, thereby helping to improve the screening effect and enhance the flexibility and practicality of operation. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 This is a frontal perspective view of a preferred embodiment of the present invention.

[0024] Figure 2 This is a partial half-section and a magnified view of a preferred embodiment of the present invention;

[0025] Figure 3 This is a rear-view perspective structural diagram of a preferred embodiment of the present invention;

[0026] In the diagram: 1. Screening frame; 11. First screen plate; 12. Second screen plate; 13. Third screen plate; 2. Distributing circular frame; 21. Discharging frame; 22. First servo motor; 23. First rotating rod; 24. Distributing blade; 3. Discharge frame; 4. Movable groove; 41. Connecting block; 42. Buffer spring; 5. Second rotating rod; 51. Cam; 6. Second servo motor; 61. Active synchronous pulley; 62. Driven synchronous pulley; 63. First toothed belt; 64. Second toothed belt; 7. Observation window; 8. Universal wheel; 9. Support feet. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] It should be noted that this screening device is preferably suitable for the classification and screening of solid raw materials by particle size during the production of 1,4-butanediol (BDO).

[0029] like Figure 1 and Figure 2 As shown, a raw material screening device for BDO preparation includes: a screening frame 1, a first screen plate 11, a second screen plate 12, and a third screen plate 13 installed sequentially from top to bottom on the inner side of the screening frame 1, and an intermittent feeding assembly installed on the top of the screening frame 1; the intermittent feeding assembly includes: a material distribution circular frame 2 fixed on the top of the screening frame 1, a material discharge frame 21 fixed on the top of the material distribution circular frame 2, and a first servo motor 22 fixed on the front side of the material distribution circular frame 2; a first rotating rod 23 is fixed to the output end of the first servo motor 22, and several material distribution blades 24 are fixed to the side of the first rotating rod 23; several screening holes are opened on the surface of the first screen plate 11 and the second screen plate 12, and buffer connection assemblies for elastic support are provided on the contact surfaces between the sides of the first screen plate 11, the second screen plate 12, and the third screen plate 13 and the inner wall of the screening frame 1, and vibration mechanisms for intermittently hammering the bottom of the first screen plate 11, the second screen plate 12, and the third screen plate 13 are provided at the bottom.

[0030] It should be noted that the interior of the material distribution frame 2 is connected to the interior of the material feeding frame 21 and the screening frame 1 respectively. The sides of the first rotating rod 23 near both ends are rotatably connected to the inner side of the material distribution frame 2. Several material distribution blades 24 are evenly distributed circumferentially on the side of the first rotating rod 23, and the side is in contact with the inner side of the material distribution frame 2. The first screen plate 11, the second screen plate 12 and the third screen plate 13 are all inclined inside the screening frame 1. The diameter of the screening holes on the surface of the first screen plate 11 is larger than the diameter of the screening holes on the surface of the second screen plate 12.

[0031] Specifically, the BDO solid raw material to be screened is placed inside the feeding frame 21. The first servo motor 22 is started, driving the first rotating rod 23 inside the distributing circular frame 2 to rotate. This drives several distributing blades 24 to rotate synchronously. The raw material in the feeding frame 21 enters between the distributing blades 24 and the inner side of the distributing circular frame 2 through the opening at the connection point with the distributing circular frame 2. When the distributing blades 24 push the raw material to the opening at the connection point between the distributing circular frame 2 and the screening frame 1, the raw material falls onto the surface of the first screen plate 11, and then... By simply controlling the rotation speed of several material distribution blades 24, different degrees of intermittent feeding effects can be achieved. Through the cooperation of the vibration mechanism and the buffer connection assembly, the raw materials can be quickly graded and screened in three stages by passing through several screen holes, the first screen plate 11, the second screen plate 12 and the third screen plate 13. This avoids the situation where the screening force of the screen plate is limited when the raw materials are continuously poured in, resulting in excessive accumulation of raw materials on the top of the screen plate. This effectively improves the screening rate and enhances its working efficiency and practicality.

[0032] like Figure 2 As shown, in some embodiments, a plurality of discharge frames 3 are fixed on one side of the screening frame 1, and are respectively facing the inclined bottom ends of the first screen plate 11, the second screen plate 12 and the third screen plate 13; through the arrangement of the plurality of discharge frames 3, the raw materials screened on the surface of the first screen plate 11, the second screen plate 12 and the third screen plate 13 can be discharged from the inclined bottom ends through the discharge frames 3 respectively, thus completing the screening operation.

[0033] In some embodiments, the buffer connection assembly includes: a plurality of movable grooves 4 formed inside the screening frame 1, a plurality of connecting blocks 41 respectively fixed to the sides of the first screen plate 11, the second screen plate 12 and the third screen plate 13, and buffer springs 42 fixed to the top and bottom of the connecting blocks 41; one end of the buffer spring 42 is fixed to the inside of the movable groove 4.

[0034] It should be noted that the width of the connecting block 41 is the same as the width of the movable groove 4, and the two are slidably connected. When the vibration mechanism causes the bottom of the first screen plate 11, the second screen plate 12, and the third screen plate 13 to vibrate, the resulting up-and-down force will drive several connecting blocks 41 on the sides of the first screen plate 11, the second screen plate 12, and the third screen plate 13 to slide up and down inside the several movable grooves 4, and squeeze the buffer springs 42 on the inner side, thereby achieving the function of elastic support. This allows the first screen plate 11, the second screen plate 12, and the third screen plate 13 to receive the up-and-down force of its vibration, thereby improving the effect of vibration screening.

[0035] like Figure 2 and Figure 3 As shown, in some embodiments, the vibration mechanism includes: a plurality of second rotating rods 5 rotatably connected to the inner side of the screening frame 1, a plurality of cams 51 fixed to the sides of the plurality of second rotating rods 5, and a power assembly installed on the back of the screening frame 1 for driving the plurality of second rotating rods 5 to rotate; the plurality of second rotating rods 5 are respectively located at the bottom of the first screen plate 11, the second screen plate 12 and the third screen plate 13; the power assembly includes: a second servo motor 6 fixed to the top of the screening frame 1, an active synchronous pulley 61 fixed to the output end of the second servo motor 6, and a plurality of driven synchronous pulleys 62 fixed to one end of the plurality of second rotating rods 5 located on the back of the screening frame 1; a first toothed belt 63 meshes between the active synchronous pulley 61 and the driven synchronous pulleys 62, and a second toothed belt 64 meshes between the plurality of driven synchronous pulleys 62.

[0036] It should be noted that the distance from the center of cam 51 to the protruding end is greater than the distance from the center of cam 51 to the bottom of the first screen plate 11, the second screen plate 12, or the third screen plate 13. The second servo motor 6 is activated, driving the active synchronous pulley 61 at the output end to rotate. Through the engagement of the first toothed belt 63, it can drive the rotation of the driven synchronous pulley 62. Furthermore, through the engagement of the second toothed belt 64 between the driven synchronous pulleys 62, it can drive several driven synchronous pulleys 62 and several second rotating rods 5 to rotate synchronously. When the second rotating rod 5 rotates... When rotating, several cams 51 on its side will also rotate. Since the distance from the center of cam 51 to the protruding end is greater than the distance from the center of cam 51 to the bottom of the first screen plate 11, the second screen plate 12, or the third screen plate 13, the protruding end of cam 51 will intermittently hammer its bottom upwards, thereby achieving the purpose of vibration. By simply adjusting the rotation speed of cam 51, the vibration frequency of the first screen plate 11, the second screen plate 12, and the third screen plate 13 can be controlled, which helps to improve the screening effect and enhance the flexibility and practicality of operation.

[0037] like Figure 1As shown, in some embodiments, the front of the screening frame 1 is provided with several observation windows 7 for observing the internal condition of the screening frame 1; the observation windows 7 make it convenient for staff to observe the screening condition inside the screening frame 1.

[0038] In some embodiments, the bottom of the screening frame 1 is equipped with several casters 8 for easy movement of the whole; the presence of several casters 8 makes it easy for workers to move the whole.

[0039] In some embodiments, the bottom of the screening frame 1 is equipped with a plurality of support feet 9 for providing stable support to the screening frame 1; by setting a plurality of support feet 9, the screening frame 1 can be supported, so that the casters 8 can be lifted off the ground, thereby achieving the effect of stable support.

[0040] In use, this invention is moved to the working area by several casters 8. Several support feet 9 lift the casters 8 off the ground, providing stable support for the screening frame 1. The BDO solid raw material to be screened is placed inside the feeding frame 21. The first servo motor 22 is started, driving the first rotating rod 23 inside the distributing circular frame 2 to rotate. This causes several distributing blades 24 to rotate synchronously. The raw material inside the feeding frame 21 enters the distributing blades 24 and the distributing circular frame 2 through the opening connecting to the distributing circular frame 2. Between the inner sides, when several distributing blades 24 push the raw material to the opening where the distributing circular frame 2 connects with the screening frame 1, the raw material will fall onto the surface of the first screen plate 11, activating the second servo motor 6, which drives the active synchronous pulley 61 at the output end to rotate. Through the meshing of the first toothed belt 63, it can drive the rotation of the driven synchronous pulley 62, and through the meshing of the second toothed belt 64 between several driven synchronous pulleys 62, it can drive several driven synchronous pulleys 62 and several second rotating rods 5 to rotate synchronously. When the second rotating rods 5 rotate, the second rotating rods 64 rotate. When rod 5 rotates, several cams 51 on its side also rotate. Since the distance from the center of cam 51 to the protruding end is greater than the distance from the center of cam 51 to the bottom of the first screen plate 11, the second screen plate 12, or the third screen plate 13, the protruding end of cam 51 will intermittently hammer its bottom upwards. At the same time, the up-and-down force generated by the vibration will drive several connecting blocks 41 on the sides of the first screen plate 11, the second screen plate 12, and the third screen plate 13 to slide up and down inside several movable grooves 4, and squeeze the inner buffer springs 42. This achieves the function of elastic support, enabling the first screen plate 11, the second screen plate 12, and the third screen plate 13 to receive the vertical force of their vibration. It allows the raw materials to be quickly graded and screened in three stages by passing through several screening holes on the surfaces of the first screen plate 11, the second screen plate 12, and the third screen plate 13. The screened raw materials on the surfaces of the first screen plate 11, the second screen plate 12, and the third screen plate 13 are discharged from the inclined bottom end through the discharge frames 3, thus completing the screening operation.

[0041] Based on the above description and the preferred embodiments of this utility model, it will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A raw material screening device for BDO preparation, characterized in that, include: The screening frame (1) includes a first screen plate (11), a second screen plate (12) and a third screen plate (13) installed from top to bottom on the inner side of the screening frame (1), and an intermittent feeding assembly installed on the top of the screening frame (1). The intermittent feeding assembly includes: a material distribution frame (2) fixed to the top of the screening frame (1), a material discharge frame (21) fixed to the top of the material distribution frame (2), and a first servo motor (22) fixed to the front of the material distribution frame (2); a first rotating rod (23) is fixed to the output end of the first servo motor (22), and a plurality of material distribution blades (24) are fixed to the side of the first rotating rod (23); The surfaces of the first sieve plate (11) and the second sieve plate (12) are provided with a plurality of screening holes. The sides of the first sieve plate (11), the second sieve plate (12) and the third sieve plate (13) are provided with buffer connection components for elastic support on the contact surfaces with the inner wall of the screening frame (1). The bottoms of the first sieve plate (11), the second sieve plate (12) and the third sieve plate (13) are provided with vibration mechanisms for intermittently hammering their bottoms to make them vibrate.

2. The raw material screening device for BDO preparation according to claim 1, characterized in that: The interior of the material distribution frame (2) is connected to the interior of the material feeding frame (21) and the screening frame (1), respectively. The sides of the first rotating rod (23) near both ends are rotatably connected to the inner side of the material distribution frame (2). A plurality of material distribution blades (24) are evenly distributed circumferentially on the side of the first rotating rod (23), and the side is in contact with the inner side of the material distribution frame (2).

3. The raw material screening device for BDO preparation according to claim 1, characterized in that: The first sieve plate (11), the second sieve plate (12) and the third sieve plate (13) are all inclined inside the screening frame (1), and the diameter of the screening holes on the surface of the first sieve plate (11) is larger than the diameter of the screening holes on the surface of the second sieve plate (12).

4. The raw material screening device for BDO preparation according to claim 1, characterized in that: A plurality of discharge frames (3) are fixed on one side of the screening frame (1), and are respectively facing the inclined bottom ends of the first screen plate (11), the second screen plate (12) and the third screen plate (13).

5. The raw material screening device for BDO preparation according to claim 1, characterized in that: The buffer connection assembly includes: a plurality of movable grooves (4) formed inside the screening frame (1), a plurality of connecting blocks (41) fixed to the sides of the first screen plate (11), the second screen plate (12) and the third screen plate (13) respectively, and buffer springs (42) fixed to the top and bottom of the connecting blocks (41); one end of the buffer spring (42) is fixed to the inside of the movable groove (4).

6. The raw material screening device for BDO preparation according to claim 1, characterized in that: The vibration mechanism includes: a plurality of second rotating rods (5) rotatably connected to the inner side of the screening frame (1), a plurality of cams (51) fixed to the sides of the plurality of second rotating rods (5), and a power assembly installed on the back of the screening frame (1) for driving the plurality of second rotating rods (5) to rotate; the plurality of second rotating rods (5) are respectively located at the bottom of the first screen plate (11), the second screen plate (12) and the third screen plate (13).

7. The raw material screening device for BDO preparation according to claim 6, characterized in that: The power assembly includes: a second servo motor (6) fixed to the top of the screening frame (1), an active synchronous pulley (61) fixed to the output end of the second servo motor (6), and a plurality of driven synchronous pulleys (62) fixed to a plurality of second rotating rods (5) located at one end of the back of the screening frame (1); a first toothed belt (63) meshes between the active synchronous pulley (61) and the driven synchronous pulleys (62), and a second toothed belt (64) meshes between the plurality of driven synchronous pulleys (62).

8. The raw material screening device for BDO preparation according to claim 1, characterized in that: The sieve frame (1) has several observation windows (7) on its front side for observing the internal condition of the sieve frame (1).

9. The raw material screening device for BDO preparation according to claim 1, characterized in that: The bottom of the screening frame (1) is equipped with several casters (8) for easy movement of the whole.

10. A raw material screening device for BDO preparation according to claim 1, characterized in that: The bottom of the screening frame (1) is equipped with several support feet (9) for providing stable support to the screening frame (1).

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