A grading screening machine suitable for the production of hydroxypropyl methylcellulose

Abstract

The utility model relates to the technical field of screening machines, and specifically to a graded screening machine suitable for the production of hydroxypropyl methylcellulose, comprising a vertically arranged spiral screening tube, on which a plurality of screen ring structures spaced apart from each other are arranged, the screen holes on the plurality of screen ring structures increasing in sequence from top to bottom, and each screen ring structure is equipped with a material guide trough inclined downwardly. The utility model facilitates fast and low-energy multi-stage screening, improves the screening efficiency of hydroxypropyl methylcellulose particles, and reduces screening energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of screening machines, in particular to a grading screening machine suitable for the production of hydroxypropyl methylcellulose. Background Art

[0002] Mainly used in adhesives, Hydroxypropyl methylcellulose is widely used as an excipient for oral and topical preparations. It is also widely used in cosmetics and food. It is generally believed that Hydroxypropyl methylcellulose is a non-toxic, non-irritating material, but excessive oral intake can cause diarrhea. Normal intake is harmless to human health. Due to different specifications of Hydroxypropyl methylcellulose particles, the subsequent processing time and process are slightly different. In order to improve the processing efficiency, it needs to be screened before it is put into the subsequent process. After searching, the Chinese patent with publication number CN216631627U discloses a screening machine for the production of Hydroxypropyl methylcellulose, including a cross support plate, the upper surface of the cross support plate A servo motor is fixedly installed in the middle of the machine, a rotating bucket is fixedly installed at one end of the rotating shaft, a medium-particle hole is opened on the inner side of the rotating bucket, a large-particle hole is opened on one side of the medium-particle hole, and a small-particle hole is opened on the other side of the medium-particle hole. A protective shell is fixedly installed on the outer side of the rotating bucket. When it is in use, the servo motor drives the rotating bucket to rotate through the rotating shaft, so as to screen the cellulose material through centrifugal force. Material holes of different sizes are opened on the inner side of the rotating bucket, which is convenient for screening materials of different particle sizes. However, this method of screening by centrifugation consumes more energy and takes a long time to screen. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a grading screening machine suitable for the production of hydroxypropyl methylcellulose, which is convenient for fast and low-energy multi-stage screening, improves the screening efficiency of hydroxypropyl methylcellulose particles and reduces the screening energy consumption.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grading screening machine suitable for the production of hydroxypropyl methylcellulose, comprising a vertically arranged spiral screening tube, on which a plurality of sieve ring structures spaced apart from each other are arranged, the sieve holes on the plurality of sieve ring structures increasing in size from top to bottom, and each of the sieve ring structures is equipped with a material guide trough arranged obliquely downward.

[0007] Preferably, it also includes a receiving hopper, which is fixedly connected to the top of the spiral screening tube.

[0008] Preferably, it also includes a material receiving mechanism, which includes a material distribution box, the bottoms of the multiple material guide troughs are fixedly connected to the top of the material distribution box, and a material distribution hopper that slidably cooperates with the material distribution box is provided below each of the material guide troughs.

[0009] Preferably, it also includes a supporting mechanism for supporting the spiral screening tube, the material receiving hopper and the material distribution box, the supporting mechanism includes a base plate arranged below the spiral screening tube and the material distribution box, the material distribution box is fixedly mounted on the base plate, the bottom of the material receiving hopper is fixedly connected to the base plate by two supporting rods, and both of the supporting rods are fixedly mounted with a clamping strip fixedly connected to the spiral screening tube.

[0010] Preferably, it also includes a re-screening mechanism arranged below the spiral screening tube, the re-screening mechanism includes a vibration table arranged below the spiral screening tube, a screening cylinder is mounted on the vibration table, a plurality of sieve plates are arranged up and down in the screening cylinder, and the sizes of the sieve holes on the plurality of sieve plates decrease successively from top to bottom.

[0011] Preferably, the bottom of the vibration table is connected to the base plate via a plurality of buffer legs, and a vibration motor installed at the bottom of the vibration table is disposed in the middle of the plurality of buffer legs.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a grading screening machine suitable for the production of hydroxypropyl methylcellulose, which has the following beneficial effects:

[0014] The grading screening machine suitable for the production of hydroxypropyl methylcellulose can deliver hydroxypropyl methylcellulose particles into the spiral screening tube through the top of the spiral screening tube through a vertically arranged spiral screening tube and a plurality of sieve ring structures and a material guide trough arranged on the spiral screening tube at intervals up and down. The hydroxypropyl methylcellulose particles spirally fall down in the spiral screening tube under the action of their own gravity, and are screened once each time they pass through a sieve ring structure and are sorted out through the material guide trough there. They are screened multiple times through multiple sieve ring structures in sequence, and the particles are screened out in order from small to large through the plurality of material guide troughs in sequence, and the largest particles fall out through the bottom of the spiral screening tube. The grading screening machine suitable for the production of hydroxypropyl methylcellulose is convenient for fast and low-energy multi-stage screening, improves the screening efficiency of hydroxypropyl methylcellulose particles and reduces the screening energy consumption, and has promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model from other perspectives as a whole;

[0017] Figure 3 It is a schematic diagram of the structure of the spiral screening tube and multiple screening ring structures of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the screening cylinder, the screening plate and the material distribution box of the utility model;

[0019] Figure 5 For this utility model Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0020] Markings in the attached drawings: 1. spiral screening tube; 2. sieve ring structure; 3. material guide trough; 4. vibration table; 5. screening cylinder; 6. sieve plate; 7. lifting ring; 8. vibration motor; 9. sliding sleeve; 10. sliding rod; 11. spring; 12. bottom plate; 13. support rod; 14. clamping bar; 15. receiving hopper; 16. material distribution box; 17. material distribution hopper. DETAILED DESCRIPTION

[0021] 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example:

[0023] See also Figure 1-5 A grading screening machine suitable for the production of hydroxypropyl methylcellulose comprises a vertically arranged spiral screening tube 1, on which a plurality of sieve ring structures 2 are arranged at intervals from top to bottom, the sieve holes on the plurality of sieve ring structures 2 increase successively from top to bottom, and each sieve ring structure 2 is equipped with a material guide trough 3 arranged obliquely downward.

[0024] Specifically, it also includes a receiving hopper 15, which is fixedly connected to the top of the spiral screening tube 1. Through the receiving hopper 15, it is convenient to pour the hypromellose particles into the spiral screening tube 1, thereby ensuring the flow rate of the hypromellose particles flowing through the spiral screening tube 1 and ensuring the smoothness of the screening.

[0025] Specifically, it also includes a material receiving mechanism, which includes a distribution box 16, the bottoms of the multiple material guide troughs 3 are fixedly connected to the top of the distribution box 16, and a distribution hopper 17 that slides with the distribution box 16 is provided under each material guide trough 3. Through the cooperation of the distribution box 16 and the multiple distribution hoppers 17, it is convenient to separately deliver the hydroxypropyl methylcellulose particles of various specifications sent out through the multiple material guide troughs 3 into the distribution hoppers 17 for collection. Furthermore, observation ports are provided on both sides of the top of the distribution box 16. By setting the observation ports, it is convenient to observe the situation of the hydroxypropyl methylcellulose particles falling into the multiple distribution hoppers 17, and then replace the distribution hoppers 17 in time.

[0026] Specifically, it also includes a supporting mechanism for supporting the spiral screening tube 1, the material receiving hopper 15 and the material distribution box 16. The supporting mechanism includes a base plate 12 arranged below the spiral screening tube 1 and the material distribution box 16. The material distribution box 16 is fixedly installed on the base plate 12. The bottom of the material receiving hopper 15 is fixedly connected to the base plate 12 through two supporting rods 13. The two supporting rods 13 are fixedly mounted with a clamping strip 14 fixedly connected to the spiral screening tube 1. Through the base plate 12, the support rods 13 and the clamping strip 14, the spiral screening tube 1, the material receiving hopper 15 and the material distribution box 16 are easily supported, thereby increasing the stability of the overall structure.

[0027] Specifically, it also includes a re-screening mechanism arranged below the spiral screening tube 1, and the re-screening mechanism includes a vibration table 4 arranged below the spiral screening tube 1, a screening cylinder 5 is clamped on the vibration table 4, and multiple sieve plates 6 are arranged up and down in the screening cylinder 5. The sizes of the sieve holes on the multiple sieve plates 6 decrease successively from top to bottom. Through the re-screening mechanism, it is convenient to screen the largest particles of hydroxypropyl methylcellulose particles screened out again to ensure the thoroughness of the screening. After multi-stage screening by multiple sieve plates 6, the largest particles of hydroxypropyl methylcellulose particles are further subdivided into several specifications, which is conducive to the later processing operations. Furthermore, a lifting ring 7 is provided on the inner top of the sieve plate 6, and the sieve plate 6 is taken out of the screening cylinder 5 by turning over the lifting ring 7.

[0028] Specifically, the bottom of the vibration table 4 is connected to the bottom plate 12 through a plurality of buffer legs, and a vibration motor 8 installed at the bottom of the vibration table 4 is provided in the middle position of the plurality of buffer legs. The vibration motor 8 can facilitate the vibration of the vibration table 4, thereby driving the plurality of screening cylinders 5 and the plurality of sieve plates 6 in the screening cylinders 5 to vibrate, thereby improving the screening effect of the multiple screening mechanism. Furthermore, the buffer legs include a sliding sleeve 9 and a sliding rod 10 that are slidably matched, the top of the sliding rod 10 is fixedly connected to the vibration table 4, the bottom of the sliding sleeve 9 is fixedly connected to the bottom plate 12, and a spring 11 is connected between the bottom of the sliding rod 10 and the inner bottom of the sliding sleeve 9. Through the expansion and contraction of the spring 11, the impact of the vibration of the vibration table 4 on the bottom plate 12 is buffered, thereby reducing the generation of noise.

[0029] When in use, the hydroxypropyl methylcellulose particles can be fed into the spiral screening tube 1 through the top of the spiral screening tube 1. Under the action of their own gravity, the hydroxypropyl methylcellulose particles spirally fall down in the spiral screening tube 1. Each time they pass through a screen ring structure 2, they are screened once and sorted out through the guide trough 3 there. They are screened multiple times through multiple screen ring structures 2 in sequence. They are screened out through multiple guide troughs 3 in order from small to large particles, and the largest particles fall out through the bottom of the spiral screening tube 1.

[0030] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0031] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0032] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0033] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A grading screening machine suitable for the production of hydroxypropyl methylcellulose, characterized in that: The invention comprises a vertically arranged spiral screening tube (1), on which a plurality of screen ring structures (2) are arranged at intervals up and down, the screen holes on the plurality of screen ring structures (2) increase in size from top to bottom, and each of the screen ring structures (2) is equipped with a material guide trough (3) arranged obliquely downward.

2. The grading screening machine suitable for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that: It also comprises a receiving hopper (15), wherein the receiving hopper (15) is fixedly connected to the top of the spiral screening tube (1).

3. The grading screening machine suitable for the production of hydroxypropyl methylcellulose according to claim 2, characterized in that: It also includes a material receiving mechanism, which includes a material distribution box (16), the bottoms of the plurality of material guide grooves (3) are fixedly connected to the top of the material distribution box (16), and a material distribution hopper (17) that slidably cooperates with the material distribution box (16) is provided below each of the material guide grooves (3).

4. The grading screening machine suitable for the production of hydroxypropyl methylcellulose according to claim 3, characterized in that: It also includes a supporting mechanism for supporting the spiral screening tube (1), the receiving hopper (15) and the distribution box (16), the supporting mechanism including a bottom plate (12) arranged below the spiral screening tube (1) and the distribution box (16), the distribution box (16) being fixedly mounted on the bottom plate (12), the bottom of the receiving hopper (15) being fixedly connected to the bottom plate (12) via two supporting rods (13), and the two supporting rods (13) are both fixedly mounted with a clamping strip (14) fixedly connected to the spiral screening tube (1).

5. The grading screening machine suitable for the production of hydroxypropyl methylcellulose according to claim 4, characterized in that: The invention also comprises a re-screening mechanism arranged below the spiral screening tube (1), the re-screening mechanism comprising a vibration table (4) arranged below the spiral screening tube (1), a screening cylinder (5) being clamped on the vibration table (4), a plurality of sieve plates (6) being clamped in the screening cylinder (5) in an array from top to bottom, the sieve holes on the plurality of sieve plates (6) decreasing in size from top to bottom.

6. The grading screening machine suitable for the production of hydroxypropyl methylcellulose according to claim 5, characterized in that: The bottom of the vibration table (4) is connected to the bottom plate (12) via a plurality of buffer legs, and a vibration motor (8) installed at the bottom of the vibration table (4) is provided in the middle of the plurality of buffer legs.

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