A sterile crushing feed valve

Abstract

An aseptic crushing feed valve, comprising an outer shell, a block breaking mechanism disposed in the outer shell and integrally formed, and a synchronous drive mechanism driving the block breaking mechanism. The outer shell comprises a shell, a feed chamber disposed in the shell, and two inlet and outlet barrels disposed at both ends of the shell and connected to the feed chamber. The block breaking mechanism comprises two rotating shafts penetrating the feed chamber and having one end passing through the shell, a plurality of toothed rings disposed at intervals on each rotating shaft and corresponding to each other, a plurality of clearance gaps disposed between the two toothed rings, and at least three circumferential block breaking teeth disposed on the toothed rings. The aseptic crushing feed valve adopts a block breaking mechanism of an integrated structure, which reduces the gaps and dead angles between the block breaking mechanisms, effectively avoids powder residue and bacterial growth, achieves sufficient crushing, uniform feeding, and a longer equipment life.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, in particular to an aseptic crushing feed valve. Background Art

[0002] With the continuous improvement of social medical level, the research and development and production speed of new drugs are accelerating, and these new technology drugs have also put forward more stringent requirements on the production environment. In order to produce safe and hygienic drugs, pharmaceutical companies attach great importance to the sanitation management of pharmaceutical workshops. Not only must there be strict implementation of pharmaceutical process sanitation management, but also when establishing pharmaceutical workshops, new closed raw material crushing devices that fully meet relevant sanitation requirements must be designed and built.

[0003] For example, a Chinese patent document discloses a closed raw material crushing device [application number: 201610779319.8], comprising: a feed trough, a shell, a crushing drum, a hydraulic lifting plate, a material cart and a driving mechanism for driving the crushing drum; the feed trough is fixedly arranged directly above the shell, the crushing drum is rollingly fixed in the shell, the crushing drum is located directly above the material cart, the hydraulic lifting plate is fixedly arranged directly below the shell, the material cart is arranged directly above the lifting plate, and the material cart is detachably connected to the shell; a feed trough baffle that can be opened and closed is provided at the upper end of the feed trough; the crushing drum is provided with three equidistantly arranged drum teeth; the outer surface of the material cart is tangent to the inner surface of the shell.

[0004] The closed raw material crushing device described in the invention can realize the closed crushing of raw materials and the closed output after crushing, effectively improving the hygienic safety of raw material crushing and ultimately ensuring the product quality of pharmaceutical production. However, there are still the following problems:

[0005] 1. The crushed materials are limited, the crushing is insufficient and the material discharge is uniform.

[0006] 2. The closed raw material crushing device is relatively large, the block breaking mechanism is not integrally formed, there are many dead angles and gaps inside, it is not easy to clean the inner cavity, the crushed materials are easy to remain, bacteria breed, and it cannot meet the medicinal sterility requirements.

[0007] 3. The materials are broken into pieces and crushed at the same time, and the driving equipment cannot reach the required maximum power instantly, which may easily cause insufficient crushing. Moreover, the shaft can withstand greater shear force, torque and impact load, which may easily cause equipment damage. Summary of the invention

[0008] In view of this, the present invention provides an aseptic crushing feed valve to solve the above problems.

[0009] A sterile crushing feed valve, comprising an outer shell, a block breaking mechanism disposed in the outer shell and integrally formed, and a synchronous drive mechanism driving the block breaking mechanism. The outer shell comprises a shell, a feed chamber disposed in the shell, and two inlet and outlet barrels disposed at both ends of the shell and connected to the feed chamber. The block breaking mechanism comprises two rotating shafts penetrating the feed chamber and having one end passing through the shell, a plurality of toothed rings disposed at intervals on each rotating shaft and corresponding to each other, a plurality of clearance gaps disposed between the two toothed rings, and at least three block breaking teeth disposed on the toothed rings on a circumference. The block breaking teeth on the corresponding toothed rings of the two rotating shafts are arranged alternately and symmetrically in sequence, and the toothed rings on the same rotating shaft are tilted in sequence along the circumference of the rotating shaft, forcing the corresponding block breaking teeth on the coaxial adjacent toothed rings to have an angle difference θ, and the angle difference θ is smaller than the angle formed between the adjacent block breaking teeth on the same toothed ring. The synchronous drive mechanism includes a driving source connected to one end of any rotating shaft passing through the housing, a driving gear arranged on the rotating shaft connected to the driving source, a driven gear arranged on the rotating shaft not connected to the driving source and meshingly connected to the braking gear, and two driven shafts embedded in the end of the housing away from the driving source and respectively connected to the rotating shafts. The driving source drives the rotating shaft connected to it to rotate, and through the cooperation of the driving gear and the driven gear, the transmission is transmitted to the rotating shaft not connected to the driving source, driving both rotating shafts to rotate downward along the adjacent side of the rotating shafts, forcing the end of the broken block tooth away from the rotating shaft to rotate through the corresponding clearance gap of the adjacent rotating shaft.

[0010] Furthermore, the thickness of the block-breaking teeth is less than or equal to the width of the corresponding clearance gap along the axial direction of the rotating shaft.

[0011] Furthermore, a clearance plane is provided at one end of the breaker tooth away from the gear ring, and when the clearance plane rotates through the corresponding clearance gap and is located at the centerline connecting the two rotating shafts, the clearance plane is tangent to the outer wall of the adjacent rotating shaft.

[0012] Furthermore, a sealing structure 1 is provided between the rotating shaft and the housing, and the sealing structure 1 includes a mounting hole arranged in the housing for the rotating shaft to pass through, and a double-lip sealing ring 1 embedded in the mounting hole and sleeved on the rotating shaft.

[0013] Furthermore, a second sealing structure is provided between the driven shaft and the housing, and the second sealing structure includes a mounting groove provided in the housing for the driven shaft to pass through, and a second double-lip sealing ring embedded in the mounting groove and sleeved on the driven shaft.

[0014] Furthermore, a bearing 1 which is sleeved on the rotating shaft is provided on one side of the mounting hole away from the double-lip sealing ring 1.

[0015] Furthermore, a second bearing sleeved on the driven shaft is provided at one end of the second mounting groove away from the second double-lip sealing ring.

[0016] Furthermore, the angle difference θ between the corresponding broken block teeth on the coaxial adjacent gear rings is between 5° and 10°.

[0017] Furthermore, the width of the block-breaking teeth gradually decreases radially outwards.

[0018] Furthermore, a crushing space is formed between adjacent breaking teeth of the same tooth ring, one side of the breaking tooth is provided with a cutting portion at the front end along the rotation direction of the shaft, and the side of the breaking tooth away from the cutting portion is provided with a stop top at the rear end along the rotation direction of the shaft.

[0019] Compared with the prior art, the aseptic crushing feed valve provided by the present invention adopts a block breaking mechanism of an integrated structure, which reduces the gaps and dead corners between the block breaking mechanisms, effectively avoids powder residue and bacterial growth, has good sealing performance, and can clean the feed chamber without disassembling the feed valve structure. At the same time, the block breaking teeth on the corresponding toothed rings on the two rotating shafts are tilted successively along the circumference of the rotating shaft, so that there is an angle difference θ between the corresponding block breaking teeth on the coaxial adjacent toothed rings, so that when the block breaking mechanism breaks blocks, the crushing spaces at one end of the block breaking mechanism are staggered and closed in sequence, that is, the material crushing operation is performed, and the synchronous drive mechanism can gradually increase the crushing power, the crushing is sufficient, the material is discharged evenly, and the material can be prevented from being broken and crushed at the same time, so as to prevent the synchronous drive mechanism from being unable to instantly reach the required maximum power, thereby causing insufficient crushing, and to avoid the problem of the rotating shaft being able to withstand greater shear force, torque and impact load leading to equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an aseptic crushing feed valve provided by the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the aseptic crushing feed valve after removing the outer shell.

[0022] Figure 3 for Figure 1 A schematic diagram of an axial cross-section of an aseptic crushing feed valve along the rotating shaft.

[0023] Figure 4 for Figure 1 A schematic diagram of a radial cross-section of a block breaking mechanism of an aseptic crushing feed valve along the rotating axis.

[0024] Figure 5 for Figure 1 A schematic diagram of a radial cross-section of a driving gear and a driven gear of an aseptic crushing feed valve along a rotating shaft. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0026] See also Figures 1 to 5 , which is a schematic diagram of the structure of an aseptic crushing feed valve provided by the present invention. An aseptic crushing feed valve is mainly used for crushing materials such as sterile environment medicines, and includes a shell 10, a block breaking mechanism 20 arranged in the shell 10 and integrally formed, and a synchronous drive mechanism 30 driving the block breaking mechanism 20. It can be imagined that the aseptic crushing feed valve also includes some other functional components and specific structures, such as a power module, a mounting structure, a sealing structure, etc., which are all technologies well known to people in the field, so they will not be described in detail one by one here.

[0027] The housing 10 includes a shell 11, a feed chamber 12 disposed in the shell 11, and two inlet and outlet barrels 13 disposed at both ends of the shell 11 and connected to the feed chamber 12. In this embodiment, the shell 11 is made of stainless steel, flanges are disposed at both ends of the inlet and outlet barrels 13, and the flanges and other external structures are connected by clamps or flanges to form a sealed connection, thereby ensuring the sealing of the inlet and outlet ports of the feed chamber 12, thereby achieving a continuous feed crushing effect.

[0028] The block breaking mechanism 20 includes two rotating shafts 21 that penetrate the feed chamber 12 and one end of which passes through the housing 11, a plurality of toothed rings 22 that are arranged at intervals on each rotating shaft 21 and correspond to each other, a plurality of clearance gaps 24 that are arranged between the two toothed rings 22, and at least three circumferences of block breaking teeth 23 that are arranged on the toothed rings 22. The working space formed by the rotation of the toothed rings 22 on the two rotating shafts 21 is in the shape of two cylinders with slightly overlapping adjacent ends. It can be imagined that the working space formed by the rotation of the toothed rings 22 on the two rotating shafts 21 matches the inner wall of the feed chamber 12. In this embodiment, the rotating shaft 21, the toothed rings 22, and the block breaking teeth 23 are integrally die-cast, that is, an integral structure, which can reduce the gaps and dead corners between the block breaking mechanisms 20 and avoid the residual crushed materials causing bacterial growth.

[0029] In this embodiment, there are 8 block-breaking teeth 23 on the same tooth ring 22, and the angle between adjacent block-breaking teeth 23 is between 0 and 45 degrees. A crushing space 232 is formed between adjacent block-breaking teeth 23 on the same tooth ring 22, and a cutting portion 233 at the front end along the rotation direction of the rotating shaft 21 is provided on one side of the block-breaking teeth 23, and a contact top portion 244 at the rear end along the rotation direction of the rotating shaft 21 is provided on the side of the block-breaking teeth 23 away from the cutting portion 233. The block-breaking teeth 23 on the tooth rings 22 corresponding to the two rotating shafts 21 are arranged in a staggered and symmetrical manner. It can be imagined that the material to be cut enters the feed chamber 12 through the inlet and outlet barrel 13, and falls onto the abutment top 244 of the corresponding block-breaking teeth 23 in a staggered state between the two rotating shafts 21. The synchronous drive mechanism 30 drives the two rotating shafts 21 to rotate downward along the adjacent side of the rotating shafts 21, forcing the end of the block-breaking teeth 23 away from the rotating shaft 21 to rotate through the corresponding clearance gap 24 of the adjacent rotating shaft 21. The block-breaking teeth 23 on different rotating shafts 21 are staggered so that the crushing space 232 is gradually reduced until it is zero, and the block breaking and crushing of the material can be completed. The toothed ring 22 on the same rotating shaft 21 is tilted successively along the circumference of the rotating shaft 21, forcing the corresponding block-breaking teeth 23 on the coaxial adjacent toothed rings 22 to have an angle difference θ, and the angle difference θ is smaller than the angle between the adjacent block-breaking teeth 23 on the same toothed ring 22. The angle difference θ is set so that when the block breaking mechanism 20 breaks blocks, the crushing spaces 232 at one end of the block breaking mechanism 20 are closed in sequence, that is, the material crushing operation is performed, and the point crushing action along the axial direction of the rotating shaft is replaced by the original one. The synchronous drive mechanism 30 can gradually increase the crushing power, and can avoid the material from being broken and crushed at the same time, and prevent the synchronous drive mechanism 30 from being unable to instantly reach the required maximum power, thereby causing insufficient crushing, and also avoid the problem that the rotating shaft 21 can withstand greater shear force, torque and impact loads leading to equipment damage. In this embodiment, the angle difference θ of the corresponding block breaking teeth 23 on the coaxial adjacent tooth rings 22 is between 5° and 10°. Limiting the size of the angle difference θ can prevent the material that is initially broken from sliding onto other abutment tops 244, thereby causing insufficient crushing and uneven material feeding. The thickness of the block breaking tooth 23 is less than or equal to the width of the corresponding clearance gap 24 along the axial direction of the rotating shaft 21, and the width of the block breaking tooth 23 gradually decreases radially outward. The structural design of the block-breaking tooth 23 enables a clearance fit to be formed between the block-breaking tooth 23 and the clearance gap 24 when the block-breaking tooth 23 rotates through the corresponding clearance gap 24 of the adjacent rotating shaft 21, so that the material is fully crushed and the material is evenly fed. At the same time, interference is avoided when the block-breaking teeth 23 of different rotating shafts 21 rotate, thereby reducing wear. A clearance plane 231 is provided at one end of the block-breaking tooth 23 away from the gear ring 22. When the clearance plane 231 rotates through the corresponding clearance gap 24 and is located at the centerline of the two rotating shafts 21, the clearance plane 231 is tangent to the outer wall of the adjacent rotating shaft 21. By matching the clearance plane 231 with the outer wall of the rotating shaft 21, it can be ensured that the material is more fully crushed.

[0030] The synchronous drive mechanism 30 includes a driving source 31 connected to one end of any rotating shaft 21 passing through the housing 11, a driving gear 32 arranged on the rotating shaft 21 connected to the driving source 31, a driven gear 33 arranged on the rotating shaft 21 not connected to the driving source 31 and meshingly connected to the brake gear, and two driven shafts 34 embedded in the end of the housing 11 away from the driving source 31 and respectively connected to the rotating shaft 21. In this embodiment, the driving source 31 is a driving motor. The driving source 31 drives the rotating shaft 21 to which it is connected to rotate, and through the cooperation of the driving gear 32 and the driven gear 33, it is transmitted to the rotating shaft 21 not connected to the driving source 31, driving both rotating shafts 21 to rotate downward along the adjacent side of the rotating shafts 21, forcing the end of the broken block tooth 23 away from the rotating shaft 21 to rotate through the corresponding clearance gap 24 of the adjacent rotating shaft 21. It can be imagined that the two rotating shafts 21 can be synchronously rotated in the opposite direction by the cooperation of the driving gear 32 and the driven gear 33. The synchronous drive mechanism 30 has a simple structure and a small power loss in the driving mode. The broken material is discharged in a water curtain shape along the axial direction of the rotating shaft and between the two rotating shafts in combination with the block breaking mechanism. The material in this discharge mode is more evenly dispersed. In addition, to ensure the sterility of the synchronous drive mechanism 30, an outer cover can be installed on the outside of the synchronous drive mechanism 30, and the outer cover is sealed and connected to the housing 10.

[0031] A sealing structure 40 is provided between the rotating shaft 21 and the housing 11. The sealing structure 40 includes a mounting hole 41 provided in the housing 11 for the rotating shaft 21 to pass through, and a double-lip seal ring 42 embedded in the mounting hole 41 and sleeved on the rotating shaft 21. A bearing 42 sleeved on the rotating shaft 21 is provided on one side of the mounting hole 41 away from the double-lip seal ring 42. The sealing of the rotating shaft 21 in the mounting hole 41 can be achieved through the double-lip seal ring 42, and dynamic sealing can be achieved when the rotating shaft 21 rotates, with a better sealing effect. The bearing 42 can be used as a rotation support point of the rotating shaft 21 in the mounting hole 41, so that the rotating shaft 21 rotates more smoothly.

[0032] A sealing structure 2 50 is provided between the driven shaft 34 and the housing 11. The sealing structure 2 50 includes a mounting groove 51 provided in the housing 11 for the driven shaft 34 to pass through, and a double-lip seal ring 2 52 embedded in the mounting groove 51 and sleeved on the driven shaft 34. A bearing 2 53 sleeved on the driven shaft 34 is provided at one end of the mounting groove 51 away from the double-lip seal ring 2 52. The sealing of the driven shaft 34 in the mounting groove 51 can be achieved through the double-lip seal ring 2 52, and dynamic sealing can be achieved when the driven shaft 34 rotates, with a better sealing effect. The bearing 2 53 can be used as a rotation support point of the driven shaft 34 in the mounting groove 51, so that the driven shaft 34 rotates more smoothly.

[0033] The above-mentioned multiple sealing structures cooperate to increase the sealing performance of the overall structure. Combined with the integrated block breaking mechanism 20, dead angle structures in the feed chamber are avoided. The feed chamber can be cleaned and steam sterilized online without disassembling the feed valve structure.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A sterile crushing feed valve, characterized in that: The aseptic crushing feed valve comprises an outer shell, a block breaking mechanism which is arranged in the outer shell and is integrally formed, and a synchronous driving mechanism which drives the block breaking mechanism. The outer shell comprises a shell, a feed chamber arranged in the shell, two inlet and outlet barrels which are respectively arranged at two ends of the shell and communicate with the feed chamber. The block breaking mechanism comprises two rotating shafts which are arranged in the feed chamber and one end of which passes through the shell, a plurality of toothed rings which are arranged at intervals on each rotating shaft and correspond to each other, a plurality of clearance gaps which are arranged between the two toothed rings, and at least three circumferential The broken block teeth arranged on the gear rings are arranged in a staggered and symmetrical manner on the gear rings corresponding to the two rotating shafts. The gear rings on the same rotating shaft are tilted in sequence along the axial direction of the rotating shaft, forcing the corresponding broken block teeth on the coaxial adjacent gear rings to have an angle difference θ, and the angle difference θ is smaller than the angle between the adjacent broken block teeth on the same gear ring. The synchronous drive mechanism includes a drive source connected to one end of any rotating shaft passing through the shell, a driving gear arranged on the rotating shaft connected to the driving source, a driven gear arranged on the rotating shaft not connected to the driving source and meshing with the driving gear, and two driven gears embedded in the The driven shafts of the housing are respectively connected to the rotating shafts at one end away from the driving source, and the driving source drives the rotating shaft connected thereto to rotate, and the driving gear and the driven gear cooperate to transmit the transmission to the rotating shaft not connected to the driving source, so as to drive both rotating shafts to rotate downward along the adjacent sides of the rotating shafts, and force the broken block teeth at one end away from the rotating shaft to rotate through the corresponding clearance gap of the adjacent rotating shaft, and the thickness of the broken block teeth is less than or equal to the width of the corresponding clearance gap along the axial direction of the rotating shaft, and the angle difference θ of the corresponding broken block teeth on the coaxial adjacent tooth rings is between 5° and 10°, and the width of the broken block teeth gradually decreases radially outward. The block-breaking teeth on different rotating shafts are staggered so that the crushing space is gradually reduced until it is zero to complete the breaking and crushing of the material. A clearance plane is provided at the end of the block-breaking tooth away from the tooth ring. When the clearance plane rotates through the corresponding clearance gap and is located at the center line connecting the two rotating shafts, the clearance plane is tangent to the outer wall of the adjacent rotating shaft, and a crushing space is formed between adjacent block-breaking teeth on the same tooth ring. A cutting portion at the front end along the rotation direction of the rotating shaft is also provided on one side of the block-breaking tooth, and an abutting top portion at the rear end along the rotation direction of the rotating shaft is also provided on the side of the block-breaking tooth away from the cutting portion.

2. The aseptic crushing feed valve according to claim 1, characterized in that: A sealing structure 1 is provided between the rotating shaft and the housing, and the sealing structure 1 includes a mounting hole arranged in the housing for the rotating shaft to pass through, and a double-lip sealing ring 1 embedded in the mounting hole and sleeved on the rotating shaft.

3. The aseptic crushing feed valve according to claim 1, characterized in that: A second sealing structure is provided between the driven shaft and the housing. The second sealing structure includes a mounting groove arranged in the housing for the driven shaft to pass through, and a second double-lip sealing ring embedded in the mounting groove and sleeved on the driven shaft.

4. The aseptic crushing feed valve according to claim 2, characterized in that: A bearing 1 sleeved on the rotating shaft is provided on one side of the mounting hole away from the double-lip sealing ring 1.

5. The aseptic crushing feed valve according to claim 3, characterized in that: A bearing 2 which is sleeved on the driven shaft is provided at one end of the second mounting groove away from the second double-lip sealing ring.

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