CN211495695U

CN211495695U - Spiral feeding mechanism and dry type granulator with same

Info

Publication number: CN211495695U
Application number: CN201922427801.7U
Authority: CN
Inventors: 许倩倩; 张弘弢; 侯营
Original assignee: Beijing Xinlongli Automation Equipment Co ltd
Current assignee: Beijing Xinlongli Automation Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-15
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a material conveyor technical field, concretely relates to spiral feeding mechanism and have its dry process granulator. A screw feed mechanism comprising: the device comprises a screw rod (5) and a feeding box (6) sleeved on the periphery of the screw rod (5); the sealing ring (10) is arranged at the joint of the screw rod (5) and the feeding box (6); the sealing ring (10) is provided with a pair of arc-shaped parts (14) which are arranged oppositely, and a deformation space is formed between the pair of arc-shaped parts (14) and the screw rod (5). The utility model provides a sealing washer difficult wearing and tearing, sealed effectual spiral feeding mechanism and have its dry process granulator.

Description

Spiral feeding mechanism and dry type granulator with same

Technical Field

The utility model relates to a material conveyor technical field, concretely relates to spiral feeding mechanism and have its dry process granulator.

Background

In recent years, dry granulation machines have been rapidly developed in the pharmaceutical field, and are widely applied to processing of various pharmaceutical raw materials and auxiliary materials. The dry granulation process is a process method for changing various dried materials into sheets, and obtaining required granular products from the sheets through the processes of crushing, granulating, screening and the like.

The dry granulating machine mainly comprises a feeding mechanism, a compression roller extruding mechanism and a granulating mechanism. And the dried material and the auxiliary materials enter the granulator from the feeding mechanism, are extruded by the compression roller extruding mechanism to be changed into sheets, and pass through the granulating mechanism to obtain the required granular product.

Dry granulators typically employ a screw feed mechanism to feed the material into the compression roll work area. In order to prevent the spiral feeding mechanism from leaking materials on the joint surface of the spiral rod and the end cover of the feeding box, the strict control of the pharmaceutical production environment by the drug manufacturing quality management practice (GMP) puts higher requirements on the sealing performance of the spiral feeding mechanism. The prior art adopts two glai sealing rings and hob to carry out axial seal usually, and along with operating time's increase, the fit clearance crescent easily leads to the fact because of long-time wearing and tearing between glai sealing ring and the hob, and the material is revealed from the gap easily, and sealed effect is not good, needs often to be changed, also does not satisfy the GMP requirement simultaneously.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art sealing washer easy wearing and tearing, the not good defect of sealed effect to a spiral feeding mechanism is provided.

The utility model provides a spiral feeding mechanism, include:

the feeding box is sleeved on the periphery of the screw rod;

the sealing washer, follow the axial of hob is located the hob with the junction of pay-off box, just the sealing washer has a pair of arc portion that sets up in opposite directions, and is a pair of arc portion with the hob laminating sets up, and is a pair of arc portion with be formed with a deformation space between the hob.

The pair of arc-shaped parts are bent towards the direction of mutual approaching to form a joint end arranged in contact with the screw rod.

The sealing ring is characterized by further comprising an air guide structure arranged on one side of the sealing ring, and an air passage allowing air to reach the surface of the spiral rod is formed in the air guide structure.

The air guide structure comprises a first air guide sleeve and a second air guide sleeve, the first air guide sleeve is arranged close to the surface of the spiral rod, the second air guide sleeve is arranged to be communicated with the first air guide sleeve, and the first end of the second air guide sleeve extends to the outer end face of the feeding box.

The second end of the second air guide sleeve extends to one end face of the first air guide sleeve opposite to the sealing ring.

The sealing ring is arranged on the screw rod and comprises a sealing ring and a shaft sleeve arranged between the sealing ring and the screw rod.

And a pneumatic connector is arranged on the outer end face of the air guide structure.

The device also comprises a fixing structure which penetrates through the air guide structure and is fixed in the feeding box.

The utility model also provides a dry process granulator, include spiral feeding mechanism.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a spiral feeding mechanism, locate the sealing washer of hob and pay-off box junction, arc portion because of it has a pair of setting in opposite directions, and arc portion and the laminating setting of hob portion, and be formed with a deformation space between the three, make it not only play due sealed effect, the frictional heat that produces moreover at work makes the deformation space that two arc portions formed constantly shrink, even consequently there is not other supplementary, also enable the sealing washer and tightly paste on the hob, further improve sealing performance, the effect of compensating wear has been played again simultaneously.

2. The utility model provides a spiral feeding mechanism, a pair of arc portion orientation is buckled towards the direction that is close to each other to form the laminating end that sets up with the hob contact. On the basis of ensuring the elastic deformation, the sealing ring increases the contact area with the screw rod as much as possible and ensures the sealing performance.

3. The utility model provides a spiral feeding mechanism, the air guide structure of constituteing jointly of first air guide cover and second air guide cover is equipped with the air flue in it, can make the compressed air after the filtration get into the hob surface smoothly, makes it have sealed and monitoring effect. The structure can prevent the material from leaking, effectively prolongs the service life of the sealing element, and the equipment parts and the structure meet the GMP requirement of the pharmaceutical industry.

4. The utility model provides a spiral feeding mechanism, the setting of air guide structure makes the pressure in the sealed air system can monitor. If no pressure or too low pressure exists, the pressure switch triggers an alarm; if the sealing element is worn during operation to generate air leakage, the control system triggers an alarm at the moment. The arrangement of this construction makes it possible to know the leakage of the sealing element at the first time.

5. The utility model provides a spiral feeding mechanism, setting up of axle sleeve has effectually kept apart sealing washer and hob, makes it not direct contact, has protected the hob not receive wearing and tearing, makes hob life greatly increased.

6. The utility model provides a spiral feeding mechanism runs through first air guide sleeve and fixes the fixed knot of pay-off box constructs sets up for the fixed mounting of whole air guide structure is more reliable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a spiral feeding mechanism of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of another embodiment of a second air guide sleeve.

Description of reference numerals:

1-right half clutch; 2-coupling nut; 3-locking the nut; 4-shaft sleeve; 5-a screw rod; 6-feeding box; 7-a fixed structure; 8-a first air guide sleeve; 9-a second air guide sleeve; 10-a sealing ring; 11-a pneumatic joint; 12-the airway; 13-a second end; 14-an arc; 15-first end.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

One embodiment of the screw feeding mechanism shown in fig. 1 to 3 comprises a screw rod 5 and a feeding box 6 sleeved on the periphery of the screw rod 5, wherein a sealing ring 10 is arranged at the joint of the screw rod 5 and the feeding box 6 along the axial direction of the screw rod 5. The inner wall that sealing washer 10 is close to hob 5 is equipped with a pair of arc portion 14 that sets up in opposite directions, and arc portion 14 is the ring shape, and arc portion 14 has the first end 15 that the contact set up and the second end 13 that the separation set up, and is a pair of promptly arc portion 14 is buckled towards the direction that is close to each other to form with the second end 13 that hob 5 contact set up. An elastic deformation space is formed between the pair of arc-shaped parts 14 and the screw rod 5, and the elastic deformation space can deform to a certain extent according to the stress condition, so that the pair of arc-shaped parts 14 always keep close fit and effective contact with the screw rod 5, and the sealing performance is ensured.

In a specific embodiment, the seal ring 10 is a PTFE stainless steel rotary oil seal, and the lip of the seal ring is drawn into a trumpet shape to form the arc-shaped portion 14.

In order to further improve the sealing performance, a first air guide sleeve 8 and a second air guide sleeve 9 which are used as air guide structures are further arranged on the right end face of the sealing ring 10, and a pneumatic connector 11 is arranged on the left end face of the first air guide sleeve 8. The first air guide sleeve 8 and the second air guide sleeve 9 are respectively provided with a first air passage and a second air passage, and the first air passage and the second air passage are communicated with each other to form an air passage 12 for allowing external air to reach the surface of the spiral rod 5. The compressed air is guided into the port of the screw rod 5 through the pneumatic connector 11, the first air passage and the second air passage, the air pressure sealing is realized, and the pneumatic connector is matched with the sealing ring 10 to form a two-layer sealing structure, so that the sealing performance is ensured.

The second air guide sleeve 9 has a first end extending to the outer end surface of the feeding box 6 and a second end extending to one end surface of the first air guide sleeve 8 opposite to the seal ring 10, and is formed in a zigzag shape. Namely, the second end of the second air guide sleeve 9 and the sealing ring 10 are respectively arranged at two opposite ends of the first air guide sleeve 8, and the first air guide sleeve 8 is clamped and fixed to prevent the first air guide sleeve from moving along the axial direction of the screw rod 5.

In order to further improve the firmness of the connection between the second air guide sleeve 8 and the feeding box 6, a screw is arranged as a fixing structure 7 which penetrates through the second air guide sleeve 9 and is fixed in the feeding box 6.

In order to reduce the wear of the screw rod 5, a sleeve 4 is pressed between the sealing ring 10, the first air guide sleeve 8 and the screw rod 5.

In order to limit the radial movement of the screw rod 5, the left end of the screw rod 5 is provided with a right half clutch 1, and the right half clutch 1 is sleeved with a coupling nut 2 and a locking nut 3.

As an alternative embodiment, as shown in fig. 4, the left end of the second air guide sleeve 9 may also extend downward to contact with the left end face of the seal ring 10.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A spiral feeding mechanism, comprising:

the device comprises a screw rod (5) and a feeding box (6) sleeved on the periphery of the screw rod (5);

sealing washer (10), follow the axial of hob (5) is located hob (5) with the junction of pay-off box (6), just sealing washer (10) have a pair of arc portion (14) that sets up in opposite directions, and is a pair of arc portion (14) with hob (5) part laminating sets up, and is a pair of arc portion (14) with be formed with a deformation space between hob (5).

2. Screw feeder according to claim 1, wherein a pair of said arc-shaped portions (14) are bent towards each other to form abutting ends arranged in contact with said screw rod (5).

3. Screw feeder according to claim 1 or 2, further comprising an air guide structure provided on one side of the sealing ring (10), wherein air channels (12) are formed in the air guide structure for allowing air to reach the surface of the screw rod (5).

4. The screw feeding mechanism according to claim 3, wherein the air guide structure comprises a first air guide sleeve (8) arranged close to the surface of the screw rod (5) and a second air guide sleeve (9) arranged through the first air guide sleeve (8), and a first end of the second air guide sleeve (9) extends to the outer end face of the feeding box (6).

5. Screw feeder according to claim 4, characterised in that the second end of the second air guide sleeve (9) extends to an end face of the first air guide sleeve (8) opposite the sealing ring (10).

6. Screw feeder according to claim 1 or 2, further comprising a bushing (4) arranged between the sealing ring (10) and the screw rod (5).

7. Screw feeder according to claim 3, characterised in that a pneumatic connection (11) is provided on the outer end face of the air guide structure.

8. Screw feeder according to claim 3, further comprising a fixing structure (7) extending through the air guiding structure and fixed in the magazine (6).

9. A dry granulator is characterized in that: comprising the screw feeder according to any one of claims 1 to 8.