Compression roller locking device and dry type granulator

Abstract

The utility model relates to the technical field of pharmaceutical equipment, and discloses a compression roller locking device and a dry type granulator, the compression roller locking device comprises two supporting seats which are respectively abutted against one sides, far away from each other, of two transmission shafts so as to limit the movement of one compression roller along the direction far away from the other compression roller; one end of the supporting seat is connected with the box body, the other end of the supporting seat is connected with the box body through a locking assembly, and the locking assembly is suitable for limiting movement of the supporting seat in the direction away from the transmission shaft. According to the compression roller locking device provided by the utility model, one end of each supporting seat is connected with the box body, the other end of each supporting seat is connected with the box body through the locking assembly, and the movement of the supporting seats in the direction far away from the transmission shaft is reliably limited through the locking assembly, so that the spacing distance between the two compression rollers is limited through the two supporting seats; and the uniformity of the density of the particle finished product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical equipment, in particular to a pressure roller locking device and a dry granulator. Background Art

[0002] In the pharmaceutical industry, dry granulators are widely used to process various active pharmaceutical ingredients and one or more excipients. Dry granulators primarily consist of a feed mechanism, a roller extrusion mechanism, and a granulation mechanism. The roller extrusion mechanism is a crucial component of the dry granulator, comprising a support device and a locking device for supporting and locking the roller pair. However, the material continuously fed to the roller pair exhibits an alternating property, which directly determines the unstable nature of the roller gap (also known as tablet thickness), or the compression force. If the locking device's locking reliability is poor, the roller gap of the roller pair will change, directly affecting the uniformity of the density of the finished granules. Utility Model Content

[0003] In view of this, the utility model provides a roller locking device and a dry granulator to solve the problem that the material continuously conveyed to the roller pair exhibits alternating properties, the locking reliability of the locking device is poor, and the roller gap of the roller pair changes accordingly, which directly affects the density uniformity of the finished granule products.

[0004] In a first aspect, the utility model provides a pressure roller locking device for limiting the positions of two pressure rollers on the sides away from each other. The pressure rollers are coaxially fixedly connected to a transmission shaft and connected to a box body through the transmission shaft. The pressure roller locking device includes:

[0005] The two support seats are respectively in direct or indirect contact with the sides of the two transmission shafts that are away from each other, so as to limit the movement of one of the pressure rollers in a direction away from the other pressure roller;

[0006] One end of the support seat is connected to the box body, and the other end is connected to the box body through a locking assembly. The locking assembly is suitable for limiting the movement of the support seat in a direction away from the transmission shaft.

[0007] Beneficial effects: The two support seats are respectively in contact with the sides of the two transmission shafts that are away from each other, and one end of the support seat is connected to the box body, and the other end is connected to the box body via a locking assembly. The locking assembly reliably limits the movement of the support seat in the direction away from the transmission shaft, thereby limiting the spacing between the two pressure rollers through the two support seats, which is beneficial to ensure the uniformity of the density of the finished particles.

[0008] In an optional embodiment, the locking assembly includes a pull rod, which passes through the support seat, and the first end of the pull rod is connected to the box body. The second end of the pull rod is provided with a tightening structure, which abuts against the side of the support seat away from the transmission shaft.

[0009] In an optional embodiment, the tightening structure includes two nuts, which are threadedly connected to the second end of the pull rod, and the thread rotation direction of one of the nuts is opposite to the thread rotation direction of the other nut.

[0010] Beneficial effects: The nut is connected to the pull rod through a thread to improve the operational convenience, and the two nuts have opposite thread rotation directions to construct a self-locking structure to enhance the stability and reliability of the nut group's abutment and limiting effect on the support seat, so that the nuts with positive and negative rotation directions can adapt to the action of alternating stress and are not prone to fatigue loosening, which is conducive to ensuring that its locking effect is always firm and reliable.

[0011] In an optional embodiment, the pressure roller locking device further includes a pressure sensor, which is disposed between the support seat and the abutting structure and abuts against the support seat and the abutting structure respectively.

[0012] Beneficial effect: By arranging a pressure sensor between the support seat and the abutting structure, the locking condition of the abutting structure can be monitored in real time.

[0013] In an optional embodiment, the locking assembly further includes a pull rod shaft pin, and the first end of the pull rod is connected to the box body through the pull rod shaft pin.

[0014] In an optional embodiment, the abutment area between the transmission shaft and the support seat is located between the two ends of the support seat.

[0015] Beneficial effect: The area on the support seat for contacting with the transmission shaft is located between the two ends of the support seat, so that the force arm of the clamping force at the locking assembly is greater than the force arm of the roller pressure of the transmission shaft on the support seat, thereby amplifying the clamping force of the locking assembly and transmitting it to the force of the support seat on the transmission shaft, while weakening and reducing the reaction force of the transmission shaft on the support seat and feeding it back to the locking assembly.

[0016] In an optional embodiment, the pressure roller locking device also includes a support shaft pin, which is connected to the box body, and the axis of the support shaft pin is parallel to the axis of the transmission shaft. One end of the support seat is hinged to the support shaft pin to be suitable for connection with the box body through the support shaft pin.

[0017] In an optional embodiment, a bearing is sleeved on the transmission shaft, and the support seat is in contact with the transmission shaft via the bearing.

[0018] Beneficial effect: By arranging a bearing between the transmission shaft and the support seat, the wear between the transmission shaft and the support seat is reduced.

[0019] In an optional embodiment, an arc-shaped groove is formed in the support seat corresponding to the bearing, and the outer peripheral surface of the bearing abuts against the concave surface of the arc-shaped groove.

[0020] Beneficial effect: The support seat is formed with an arc groove corresponding to the bearing, so that a part of the bearing area falls into the arc groove and abuts against the concave surface of the arc groove, so as to improve the abutment stability of the support seat to the bearing and the transmission shaft.

[0021] In a second aspect, the present invention further provides a dry granulator, comprising: the above-mentioned pressing roller locking device.

[0022] Because the dry granulator includes a pressure roller locking device, which has the same effect as the pressure roller locking device, its beneficial effects are not repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a partially cutaway structural diagram of a pressure roller locking device according to an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A partial enlarged schematic diagram;

[0026] Figure 3 for Figure 1 The structural diagram of the pull rod shown;

[0027] Figure 4 for Figure 1 A schematic structural diagram of a partially cutaway first end of the pull rod shown;

[0028] Figure 5 for Figure 1 The structural diagram of the first rotation direction nut shown;

[0029] Figure 6 for Figure 1 The structural schematic diagram of the second rotation direction nut is shown.

[0030] Description of reference numerals:

[0031] 11. Pressing roller; 12. Transmission shaft; 2. Box body; 3. Support seat; 4. Support shaft pin; 5. Locking assembly; 51. Pull rod; 511. First threaded portion; 512. Second threaded portion; 513. Articulated ear; 52. Clamping structure; 521. First rotation direction nut; 522. Second rotation direction nut; 53. Pull rod shaft pin; 6. Feeding mechanism; 7. Pressure sensor. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0033] The pressure roller extrusion mechanism includes a pressure roller pair consisting of two pressure rollers that rotate in opposite directions. The material is pushed to the pressure roller pair by the feeding mechanism. Due to the narrow structure of the pre-compacting area of ​​the vertical feeding mechanism, the space for the material pressing mechanism to fully perform the functions of rectification (turbulent flow converted to laminar flow), initial pressing, biting, pre-compacting, main compaction and pulling external guide is limited. In addition, since the conical spiral blades in the feeding mechanism are asymmetric in structure, the material continuously conveyed to the pressure roller pair exhibits unstable properties with periodic changes.

[0034] The following combination Figures 1 to 6 , describing the embodiments of the present utility model.

[0035] According to an embodiment of the present invention, on the one hand, a pressure roller locking device is provided for limiting the positions of two pressure rollers 11 on the sides away from each other. The pressure rollers 11 are coaxially fixedly connected to a transmission shaft 12 and are connected to the box body 2 through the transmission shaft 12. The pressure roller locking device includes:

[0036] The two support seats 3 are respectively in direct or indirect contact with the sides of the two transmission shafts 12 that are away from each other, so as to limit the movement of one of the pressure rollers 11 in a direction away from the other pressure roller 11;

[0037] One end of the support base 3 is connected to the box body 2 , and the other end is connected to the box body 2 via a locking assembly 5 . The locking assembly 5 is suitable for limiting the movement of the support base 3 in a direction away from the transmission shaft 12 .

[0038] The pressure roller locking device provided in this embodiment has two support seats 3 that are respectively in contact with the sides of the two transmission shafts 12 that are away from each other, and one end of the support seat 3 is connected to the box body 2, and the other end is connected to the box body 2 via a locking assembly 5. The locking assembly 5 reliably limits the movement of the support seat 3 in the direction away from the transmission shaft 12, thereby limiting the spacing between the two pressure rollers 11 through the two support seats 3, which is conducive to ensuring the uniformity of the density of the finished granules.

[0039] Specifically, during the process of the material being pressed by the two pressing rollers 11, the pressing roller locking device is suitable for limiting the sides of the two pressing rollers 11 that are away from each other, wherein the rotation axes of the two pressing rollers 11 are parallel to each other, and there is a uniform gap between the two pressing rollers 11, and the material is pressed into solid pancake-shaped slices of equal thickness through this gap.

[0040] Partial areas of the two support seats 3 are respectively located on the side where the two transmission shafts 12 are away from each other, so as to be suitable for directly or indirectly abutting and limiting the side where the two transmission shafts 12 are away from each other, thereby limiting the spacing between the two transmission shafts 12 and the two pressure rollers 11. The two support seats 3 can be the same (universal parts) or different. The locking assembly 5 is suitable for limiting the movement of the support seat 3 in the direction away from the transmission shaft 12, thereby ensuring that the support seat 3 is reliably pressed against the transmission shaft 12. Since the material continuously conveyed to the pressure roller pair has an unstable property of periodic change, when the pressure roller gap between the two pressure rollers 11 remains unchanged, if the amount of material increases, the pressing force between the pressure rollers 11 will increase accordingly, and if the amount of material decreases, the pressing force between the pressure rollers 11 will decrease accordingly. The reaction force of the pressing force is transmitted to the support seat 3, causing the support seat 3 to bear the periodic alternating stress. If the support base 3's abutment against the transmission shaft 12 is unreliable, it will become loose under long-term alternating stress. When the material quantity changes, the roller gap will also change, affecting the uniformity of the density of the finished granules. The roller locking device provided in this embodiment ensures the reliability of the support base 3's abutment against the transmission shaft 12, so that the abutment force of the support base 3 against the transmission shaft 12 changes with the reaction force of the pressing force. When the feed rate increases, the abutment force (pressing force) increases accordingly, and when the feed rate decreases, the abutment force (pressing force) decreases accordingly, ensuring that the roller gap remains unchanged. Thus, through the complementary cooperation among the feed rate, the roller gap, and the abutment force, the uniformity of the density of the finished granules is ensured.

[0041] In one embodiment, combined Figures 1 to 6 As shown, the locking assembly 5 includes a pull rod 51, which passes through the support seat 3, and the first end of the pull rod 51 is connected to the box body 2. The second end of the pull rod 51 is provided with a tightening structure 52, which abuts against the side of the support seat 3 away from the transmission shaft 12.

[0042] Specifically, the first end of the pull rod 51 is located on the side of the support base 3 facing the transmission shaft 12 and is connected to the housing 2. The second end of the pull rod 51 passes through the support base 3 and is located on the side of the support base 3 away from the transmission shaft 12. The abutment structure 52 abuts against the support base 3 to prevent the support base 3 from moving away from the transmission shaft 12, thereby limiting the transmission shaft 12.

[0043] In one embodiment, combined Figures 1 to 6As shown, the abutting structure 52 includes two nuts, which are threadedly connected to the second end of the pull rod 51, and the thread rotation direction of one nut in the nut group is opposite to the thread rotation direction of the other nut.

[0044] The pressure roller locking device provided in this embodiment is connected to the pull rod 51 through a nut thread to improve the operational convenience, and the threads of the two nuts rotate in opposite directions to form a self-locking structure, so as to enhance the stability and reliability of the nut group's abutment and limiting effect on the support seat 3, so that the two nut groups are not prone to fatigue loosening under the action of alternating stress, which is conducive to ensuring that their locking action is always firm and reliable.

[0045] Specifically, the abutting structure 52 is constructed in the form of a double nut, namely a first rotation nut 521 and a second rotation nut 522. The second rotation nut 522 is located on the side of the first rotation nut 521 away from the support seat 3. The double nuts overlap and abut, and abut against the side of the support seat 3 away from the pressure roller 11. The thread directions of the first rotation nut 521 and the second rotation nut 522 are opposite. The pull rod 51 is constructed as a round rod. The second end of the pull rod 51 is provided with a first threaded portion 511 corresponding to the first rotation nut 521 and a second threaded portion 512 corresponding to the second rotation nut 522. The outer diameter of the first threaded portion 511 is larger than the outer diameter of the second threaded portion 512. Correspondingly, the internal thread diameter of the first rotation nut 521 is D, and the internal thread diameter of the second rotation nut 522 is d, where D is greater than d, and the minor diameter of the first threaded portion 511 is larger than the outer diameter of the second threaded portion 512. However, the double nuts have the same appearance so that the nuts can be disassembled and assembled using a wrench of the same specification, which is beneficial to reducing the types of disassembly and assembly tools and simplifying operations.

[0046] In one embodiment, combined Figures 1 to 6 As shown, the pressure roller locking device further includes a pressure sensor 7, which is disposed between the support seat 3 and the abutting structure 52 and abuts against the support seat 3 and the abutting structure 52 respectively.

[0047] The pressure roller locking device provided in this embodiment is configured to provide a pressure sensor 7 between the support base 3 and the abutting structure 52 , so as to monitor the locking condition of the abutting structure 52 in real time.

[0048] Specifically, the pressure sensor 7 is provided on the pull rod 51, and defines that when the roller extrusion mechanism is operating normally, as the material feed amount changes periodically, the range of change of the pressing force of the pressing structure 52 is a preset range. When the pressing force is detected by the pressure sensor 7 to be beyond the preset range, the machine is shut down in time and the equipment is inspected and repaired. The specifications of the two pull rods 51 may be the same or different, and the specifications of the nuts are adapted to the specifications of the corresponding pull rods 51. During the actual operation of the roller extrusion mechanism, the axial position of one of the transmission shafts 12 remains stationary, and the axial position of the other transmission shaft 12 changes with the change of the material amount. One pressure sensor 7 is provided, and is located on the locking assembly 5 for locking the transmission shaft 12 that does not change its position. The length of the pull rod 51 provided with the pressure sensor 7 is greater than the length of the other pull rod 51, so as to rationally utilize resources, reduce waste, and reduce manufacturing costs.

[0049] Furthermore, a gasket may be provided between the side of the abutting structure 52 close to the supporting seat 3 and the supporting seat 3 or the pressure sensor 7 to better protect each abutting surface.

[0050] In one embodiment, combined Figures 1 to 6 As shown, the locking assembly 5 further includes a pull rod axle pin 53 , and the first end of the pull rod 51 is connected to the box body 2 via the pull rod axle pin 53 .

[0051] Specifically, the first end of the pull rod 51 is a hinged ear 513 having a through hole. The pull rod axle pin 53 is inserted into the through hole of the hinged ear 513 and fixed to the box body 2, thereby connecting the first end of the pull rod 51 to the box body 2. The two end faces of the hinged ear 513 are parallel to each other and perpendicular to the axis of the through hole. They are symmetrical with the axis of the pull rod 51, and the distance between them is greater than the diameter of the pull rod 51.

[0052] The support base 3 is provided with a through-channel for the pull rod 51 to be inserted into the through-channel. In addition, along the rotation path of the pull rod 51 about the axis of the pull rod axle pin 53 away from the support base 3, the support base 3 is provided with a corresponding clearance opening, which is connected to the through-channel to allow the pull rod 51 to rotate about the pull rod axle pin 53 and separate from the support base 3 after the clamping structure 52 is loosened.

[0053] In one embodiment, combined Figures 1 to 6 As shown, the contact area between the transmission shaft 12 and the support seat 3 is located between the two ends of the support seat 3.

[0054] The pressure roller locking device provided in this embodiment has an area on the support seat 3 for contacting with the transmission shaft 12 located between the two ends of the support seat 3, so that the force arm of the clamping force at the locking assembly 5 is greater than the force arm of the roller pressure of the transmission shaft 12 on the support seat 3, thereby amplifying the clamping force of the locking assembly 5 and transmitting it to the force of the support seat 3 on the transmission shaft 12, while weakening and reducing the reaction force of the transmission shaft 12 on the support seat 3 and feeding it back to the locking assembly 5.

[0055] Specifically, one end of the support base 3 is hinged to the housing 2, and the locking assembly 5 applies a pressing force to the support base 3 to prevent it from moving away from the transmission shaft 12. With the axis of the support shaft pin 4 as the fulcrum, the force arm of the locking assembly 5's pressing force on the support base 3 is greater than the force arm of the rolling pressure of the transmission shaft 12 on the support base 3, which helps to ensure the locking effect of the locking assembly 5.

[0056] In one embodiment, combined Figures 1 to 6 As shown, the pressure roller locking device also includes a support shaft pin 4, which is connected to the box body 2, and the axis of the support shaft pin 4 is parallel to the axis of the transmission shaft 12. One end of the support seat 3 is hinged to the support shaft pin 4 to be suitable for connection with the box body 2 through the support shaft pin 4.

[0057] Specifically, the axis of the support shaft pin 4 is parallel to the axis of the pressure roller 11, and a mounting hole is opened in the housing 2 at the position corresponding to the support shaft pin 4. A portion of the support shaft pin 4 passes through the support seat 3 and is installed in the mounting hole, so that the support seat 3 is hingedly connected to the housing 2 through the support shaft pin 4, and the rotation plane of the support seat 3 is perpendicular to the axis of the support shaft pin 4, so that the support shaft pin 4 forms a limit on the above-mentioned one end of the support seat 3 along its radial direction. The other end of the support seat 3 is connected to the housing 2 through a locking assembly 5, so as to be suitable for limiting the rotation of the other end of the support seat 3 around the axis of the support shaft pin 4 in a direction away from the transmission shaft 12, thereby ensuring that the support seat 3 is reliably pressed against the transmission shaft 12.

[0058] In one embodiment, combined Figures 1 to 6 As shown, a bearing is sleeved on the transmission shaft 12, and the support seat 3 is in contact with the transmission shaft 12 via the bearing.

[0059] The pressure roller locking device provided in this embodiment provides a bearing between the transmission shaft 12 and the support seat 3 to reduce wear between the transmission shaft 12 and the support seat 3.

[0060] Specifically, at least one bearing is mounted on the transmission shaft 12. The gap between the two transmission shafts 12 is defined as the working gap. Part of the support seat 3 abuts against the outer peripheral wall of the bearing on the side away from the working gap. Therefore, during the rotation of the transmission shaft 12, the bearing abuts and limits the movement of the transmission shaft 12 away from the other transmission shaft 12.

[0061] In one embodiment, combined Figures 1 to 6 As shown, the support seat 3 is formed with an arc-shaped groove corresponding to the bearing, and the outer peripheral surface of the bearing abuts against the concave surface of the arc-shaped groove.

[0062] The pressure roller locking device provided in this embodiment has an arc groove formed on the support seat 3 corresponding to the bearing, so that a partial area of ​​the bearing falls into the arc groove and abuts against the concave surface of the arc groove, so as to improve the abutment stability of the support seat 3 against the bearing and the transmission shaft 12.

[0063] According to an embodiment of the present invention, on the other hand, a dry granulator is provided, comprising: the above-mentioned pressing roller locking device.

[0064] Specifically, the dry granulator includes a housing 2, with a roller extrusion structure mounted on the housing 2. A feed mechanism 6 is also mounted on the housing 2. During operation, the feed mechanism 6 pushes material into the roller extrusion mechanism, where it is compressed into solid, pancake-like flakes by the roller pressing pair. Because the material continuously conveyed to the roller pair exhibits unstable, periodic properties, the gap between the two rollers 11 can easily change periodically. The support seat 3 is reliably limited by a locking assembly 5 and a support pin 4 to prevent displacement of the support seat 3 away from the drive shaft 12. The gap between the two rollers 11 is limited by the two support seats 3, ensuring uniform density of the finished granules.

[0065] Obviously, the above embodiments are merely examples for the purpose of clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A pressure roller locking device, characterized in that: The device is used to limit the positions of two pressure rollers (11) on the sides away from each other, wherein the pressure rollers (11) are coaxially fixedly connected to a transmission shaft (12) and are connected to the box (2) via the transmission shaft (12). The pressure roller locking device comprises: Two supporting seats (3) are respectively in direct or indirect contact with the sides of the two transmission shafts (12) that are away from each other, so as to limit the movement of one of the pressing rollers (11) in a direction away from the other pressing roller (11); One end of the support seat (3) is connected to the box body (2), and the other end is connected to the box body (2) via a locking assembly (5). The locking assembly (5) is suitable for limiting the movement of the support seat (3) in a direction away from the transmission shaft (12).

2. The pressure roller locking device according to claim 1, characterized in that: The locking assembly (5) includes a pull rod (51), the pull rod (51) passes through the support seat (3), and the first end of the pull rod (51) is connected to the box body (2), and the second end of the pull rod (51) is provided with a tightening structure (52), and the tightening structure (52) is in contact with the side of the support seat (3) away from the transmission shaft (12).

3. The pressure roller locking device according to claim 2, characterized in that: The abutting structure (52) comprises two nuts, which are threadedly connected to the second end of the pull rod (51), and the thread rotation direction of one of the nuts is opposite to the thread rotation direction of the other nut.

4. The pressure roller locking device according to claim 2, characterized in that: The pressure roller locking device further comprises a pressure sensor (7), which is arranged between the support seat (3) and the abutting structure (52) and abuts against the support seat (3) and the abutting structure (52) respectively.

5. The pressure roller locking device according to claim 2, characterized in that: The locking assembly (5) further comprises a pull rod axle pin (53), and the first end of the pull rod (51) is connected to the box body (2) via the pull rod axle pin (53).

6. The pressure roller locking device according to claim 1, characterized in that: The contact area between the transmission shaft (12) and the support seat (3) is located between the two ends of the support seat (3).

7. The pressure roller locking device according to claim 1, characterized in that: The pressure roller locking device further comprises a supporting shaft pin (4), the supporting shaft pin (4) being connected to the box body (2), and the axis of the supporting shaft pin (4) being parallel to the axis of the transmission shaft (12), and one end of the supporting seat (3) being hinged to the supporting shaft pin (4) so ​​as to be suitable for being connected to the box body (2) via the supporting shaft pin (4).

8. The pressure roller locking device according to any one of claims 1 to 7, characterized in that: A bearing is sleeved on the transmission shaft (12), and the support seat (3) abuts against the transmission shaft (12) via the bearing.

9. The pressure roller locking device according to claim 8, characterized in that: The support seat (3) is formed with an arc-shaped groove corresponding to the bearing, and the outer peripheral surface of the bearing abuts against the concave surface of the arc-shaped groove.

10. A dry granulator, characterized in that: include: The pressure roller locking device according to any one of claims 1 to 9.

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