Tablet tensile strength testing device

Abstract

The utility model discloses a device for testing the tensile strength of tablets, which comprises a seat stand, a mounting stand column fixedly standing on the seat stand, a frame body assembly, a barrel body, an annular rubber ring, a piston and a driving mechanism. The frame body assembly is of a frame body structure, a liftable floating platform is arranged in a frame body of the frame body structure, and a conical hole with the wide upper portion and the narrow lower portion is formed in the center area of the floating platform. The upper end of the cylinder body is detachably mounted at the upper end of the frame body assembly, the lower end of the cylinder body is provided with a guide column abutting against the taper hole, and the guide column is communicated with an inner cavity of the cylinder body; the annular rubber ring is fixed to the bottom face of the inner cavity and surrounds the upper opening end of the guide column. The piston is provided with a rubber plug end and a rod body which are connected together, and the rubber plug end enters the inner cavity from the upper end opening part of the cylinder body; the driving mechanism is fixed to the installation stand column, and the driving mechanism drives the connecting rod body and drives the rod body to ascend and descend. According to the testing device, the strength of tablets is tested in a pressurizing mode, and bad tablets are prevented from flowing into the market.

Description

Technical Field

[0001] The utility model relates to a strength testing device, specifically to a testing device for the tensile strength of tablets. Background Art

[0002] Tablets refer to sheet preparations pressed from drugs and pharmaceutical excipients evenly mixed. Tablets have the advantages of convenient administration, good chemical stability, accurate dosage, and easy portability. Currently, among the preparations included in pharmacopoeias around the world, tablets are the most numerous.

[0003] During the production and storage of tablets, some impurities are often introduced, which affect the stability and efficacy of tablets and even endanger human health. Therefore, it is necessary to conduct impurity inspections on tablets to ensure their safety and effectiveness, and at the same time provide a basis for the quality supervision and management of drugs during the production and circulation processes.

[0004] Tablets need to be tested for their strength. If the strength of the tablets is insufficient, they are prone to breakage during the production process, transportation process, or operation process, resulting in defective products and extremely easy to cause large - scale scrapping.

[0005] Therefore, it is necessary to design a testing device for tensile strength to solve the above - mentioned technical problems. Summary of the Utility Model

[0006] Aiming at the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a testing device for the tensile strength of tablets, and the purpose of designing this testing device is to test the strength of tablets.

[0007] To solve the above - mentioned technical problems, the utility model is realized through the following solutions: A testing device for the tensile strength of tablets of the utility model includes a base, an installation column fixed on the base, and further includes:

[0008] A frame assembly fixed on the base. The frame assembly is a frame structure, and there is a liftable floating platform in its frame. A tapered hole with a wider upper part and a narrower lower part is arranged in the central area of the floating platform;

[0009] A cylinder body, the upper end of which is detachably installed on the upper end of the frame assembly, and the lower end thereof has a guide post abutted against the tapered hole, and the guide post communicates with the inner cavity of the cylinder body;

[0010] An annular rubber ring fixed on the bottom surface of the inner cavity and surrounding the upper mouth end of the guide post;

[0011] A piston, which has a rubber plug end and a rod body connected together, and the rubber plug end enters the inner cavity from the upper port of the cylinder body;

[0012] The driving mechanism is fixed to the installation column, and the driving mechanism is drivingly connected to the rod body and drives the rod body to perform lifting actions.

[0013] Furthermore, vertical grooves are provided on both side vertical plates of the frame assembly.

[0014] Even further, the floating platform adjusts its height through a threaded butterfly handle, and the threaded portion of the butterfly handle passes through the vertical groove from the outside to lock and loosen the floating platform.

[0015] Furthermore, the upper ring surface of the annular rubber ring is provided with a tapered surface that is wider at the top and narrower at the bottom.

[0016] Furthermore, the cylinder body is connected with a barometer for measuring the air pressure in the inner cavity.

[0017] Furthermore, the upper plate surface of the frame assembly has a front opening notch, adjusting blocks are fixed on both the left and right sides of the front opening notch, and the upper end flange of the cylinder body is fixed through a locking block assembly.

[0018] Furthermore, the driving mechanism includes:

[0019] A motor fixed to the top of the installation column and equipped with a speed reduction mechanism;

[0020] A Z-axis lead screw rotatably installed on the side of the installation column, and the driving shaft of the motor is connected to the Z-axis lead screw;

[0021] A Z-axis guide rail fixed to the side of the installation column;

[0022] A nut assembly screwed onto the Z-axis lead screw, one end of the nut assembly is slidably connected to the Z-axis guide rail, and a grooved clamp block is installed on its outer side.

[0023] Even further, a horizontal groove is opened at the side end of the grooved clamp block, a downward-facing orifice is opened at the lower end of the horizontal groove, and the horizontal groove allows the outer convex flange side at the upper end of the rod body to enter.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] 1. The testing device of the present utility model tests the strength of tablets by pressurization, avoiding defective tablets from flowing into the market.

[0026] 2. The testing device of the present utility model is novel, abandons the traditional pressure sensor, and can accurately master the tensile strength of tablets through the numerical curve graph of air pressure. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the testing device of the present utility model.

[0028] Figure 2 This is a schematic structural view of the driving mechanism of the present utility model.

[0029] Figure 3 This is a schematic structural view of the frame assembly of the present utility model.

[0030] Figure 4 This is a schematic view of the placement position of the tablets of the present utility model.

[0031] Reference numerals in the drawings: motor 1, mounting column 2, Z-axis lead screw 3, grooved clamp 4, rod body 5, locking block assembly 6, front open notch 7, rubber plug end 8, cylinder 9, frame assembly 10, inner cavity 11, tablet 12, floating platform 13, butterfly handle 14, display screen 15, base 16, barometer 17, vertical groove 18, guide post 19, annular rubber ring 20, tapered hole 21, Z-axis guide rail 22. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Embodiment 1: The specific structure of the present utility model is as follows:

[0034] Please refer to the attached Figures 1-4 , A test device for the tensile strength of tablets of the present utility model includes a base 16 and a mounting column 2 fixed to the base 16. A display screen 15 is provided on the front side of the base 16, and the display screen 15 is used to display the air pressure magnitude curve graph of the inner cavity 11. A control unit is built in the base 16.

[0035] The test device of the present utility model further includes a frame assembly 10, a cylinder 9, an annular rubber ring 20, a piston and a driving mechanism.

[0036] The frame assembly 10 is fixed to the base 16. The frame assembly 10 is a frame structure, and a liftable floating platform 13 is provided in its frame. A tapered hole 21 that is wider at the top and narrower at the bottom is provided in the central area of the floating platform 13. Vertical grooves 18 are provided on both side vertical plates of the frame assembly 10. The height of the floating platform 13 is adjusted by a threaded butterfly handle 14, and the threaded portion of the butterfly handle 14 passes through the vertical groove 18 from the outside to lock and release the floating platform 13. As Figure 3 shown, the frame assembly 10 is a metal product, and its outer frame is a "mouth" - shaped structure. The lifting of the floating platform 13 is used to match cylinders 9 of different specifications.

[0037] The upper end of the cylinder body 9 is detachably installed at the upper end of the frame assembly 10. Its lower end has a guide post 19 that abuts against the conical hole 21, and this guide post 19 communicates with the inner cavity 11 of the cylinder body 9. The cylinder body 9 is similar to the syringe barrel and is also made of pressure-resistant metal material. There is a flange at the edge of the upper opening of the cylinder body 9. The upper plate surface of the frame assembly 10 has a front opening notch 7. Adjusting blocks are fixed on both the left and right sides of this front opening notch 7. The upper end flange of the cylinder body 9 is fixed by a locking block assembly 6. The locking and fixing block 6 is two clamping plates, which are fastened to the top of the frame assembly 10 by screws, and the upper end flange of the cylinder body 9 is clamped between the two clamping plates.

[0038] The cylinder body 9 is connected with a barometer 17 for measuring the air pressure in the inner cavity 11.

[0039] The piston has a rubber plug end 8 and a rod body 5 connected together. The rubber plug end 8 enters the inner cavity 11 from the upper port of the cylinder body 9;

[0040] The annular rubber ring 20 is fixed to the bottom surface of the inner cavity 11 and this annular rubber ring 20 surrounds the upper mouth end of the guide post 19. Since most of the tablets 12 are circular structures with convexities on both sides, therefore, the upper ring surface of the annular rubber ring 20 is provided with a tapered surface that is wider at the top and narrower at the bottom. This tapered surface just matches most of the tablets 12. The edge of the lower convex surface of the tablet 12 abuts against the tapered surface, and the tablet 12 cuts off the inner cavity 11 from the lower channel, making the inner cavity 11 form a closed chamber. When the piston descends, the air pressure in the inner cavity 11 will gradually increase. Due to the increase in air pressure, the force generated by the air pressure will act on the upper convex surface of the tablet 12. Since the lower convex surface of the tablet 12 communicates with the external space through the through hole of the guide post 19, therefore, there will be an air pressure difference between the upper convex surface and the lower convex surface of the tablet 12. Furthermore, the forces on the upper and lower parts of the tablet 12 body are inconsistent until it breaks. Through the recorded change of the air pressure in the inner cavity by the display screen 15, the highest air pressure record in the inner cavity 11 can be viewed. By this highest air pressure record, whether it is greater than the preset value. If it is greater than the preset value, it indicates that the quality of this tablet 12 is qualified. If it is less than the preset value, then the tablet 12 is unqualified, and this batch of tablets 12 shall not flow into the market.

[0041] Embodiment 2:

[0042] The following is the structure and working principle of the driving mechanism:

[0043] The driving mechanism is fixed to the installation column 2, and this driving mechanism is drivingly connected to the rod body 5 and drives the rod body 5 to make a lifting motion. The driving mechanism includes:

[0044] A motor 1 with a speed reduction mechanism fixed to the top of the installation column 2;

[0045] A Z-axis lead screw 3 rotatably mounted on the side of the mounting column 2, and the drive shaft of the motor 1 is connected to the Z-axis lead screw 3;

[0046] A Z-axis guide rail 22 fixed to the side of the mounting column 2;

[0047] A nut assembly screwed onto the Z-axis lead screw 3, one end of the nut assembly is slidably connected to the Z-axis guide rail 22, and a grooved clamp block 4 is installed on the outside thereof. A horizontal groove is opened at the side end of the grooved clamp block 4, and a downward orifice is opened at the lower end of the horizontal groove, and the outer convex wing side at the upper end of the rod body 5 enters the horizontal groove.

[0048] Working principle of the driving mechanism:

[0049] Put the tablet 12 into the conical surface of the annular rubber ring 20, and fix the pressurizing assembly composed of the cylinder body 9, the piston and the guide post 19. In the initial state, the rod body 5 is pulled to the highest point, so that a long-distance space is left in the inner cavity 11.

[0050] Start the motor 1, the motor 1 drives the Z-axis lead screw 3 to rotate, the Z-axis lead screw 3 drives the nut assembly to move downward along the Z-axis guide rail 22, the nut assembly drives the grooved clamp block 4 to move downward, the grooved clamp block 4 drives the rod body 5 to move downward, the rod body 5 drives the rubber plug end 8 to move downward, and the rubber plug end 8 compresses the air in the inner cavity 11 until the tablet 12 is broken, and the motor 1 stops.

[0051] The air pressure change in the inner cavity 11 is reflected on the display screen 15 in real time. The display screen 15 records the highest air pressure through a curve graph, and determines whether the tablet 12 is qualified with reference to the description in Embodiment 1.

[0052] In summary, the test device of the present invention tests the strength of the tablet by pressurization, avoiding defective tablets from flowing into the market. The test device of the present invention is novel, abandoning the traditional pressure sensor, and the tensile strength of the tablet can be accurately grasped through the numerical curve graph of the air pressure.

[0053] The above is only the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A tablet tensile strength testing device, comprising a base (16) and a mounting column (2) fixed to the base (16), characterized in that: Also includes: A frame assembly (10) fixed to the base (16), the frame assembly (10) being a frame structure, wherein a floating platform (13) which can be raised and lowered is provided in the frame, and a tapered hole (21) which is wide at the top and narrow at the bottom is provided in the central area of ​​the floating platform (13); A cylinder (9), the upper end of which is detachably mounted on the upper end of the frame assembly (10), and the lower end of which is provided with a guide column (19) abutting against the tapered hole (21), the guide column (19) being in communication with the inner cavity (11) of the cylinder (9); An annular rubber ring (20) is fixed to the bottom surface of the inner cavity (11) and surrounds the upper end of the guide column (19); A piston, the piston having a plug end (8) and a rod body (5) connected together, wherein the plug end (8) enters into the inner cavity (11) from the upper end portion of the cylinder body (9); A driving mechanism is fixed to the mounting column (2), the driving mechanism is connected to the rod body (5) and drives the rod body (5) to perform a lifting action.

2. A tablet tensile strength testing device according to claim 1, characterized in that: Both side upright plates of the frame assembly (10) are provided with vertical grooves (18).

3. A tablet tensile strength testing device according to claim 2, characterized in that: The height of the floating platform (13) is adjusted by a butterfly handle (14) with threads, and the threaded portion of the butterfly handle (14) passes through the vertical slot (18) from the outside to lock and release the floating platform (13).

4. A tablet tensile strength testing device according to claim 1, characterized in that: The upper ring surface of the annular rubber ring (20) is provided with a conical surface which is wider at the top and narrower at the bottom.

5. A tablet tensile strength testing device according to claim 1, characterized in that: The cylinder (9) is connected to a barometer (17) for measuring the air pressure in the inner cavity (11).

6. A tablet tensile strength testing device according to claim 1, characterized in that: The upper plate surface of the frame assembly (10) has a front opening notch (7), and adjustment blocks are fixed on the left and right sides of the front opening notch (7). The upper wing edge of the cylinder (9) is fixed by a locking block assembly (6).

7. A tablet tensile strength testing device according to claim 1, characterized in that: The driving mechanism comprises: A motor (1) fixed to the top of the mounting column (2) and equipped with a speed reduction mechanism; A Z-axis screw rod (3) rotatably mounted on the side of the mounting column (2), wherein the driving shaft of the motor (1) is connected to the Z-axis screw rod (3); A Z-axis guide rail (22) fixed to the side of the mounting column (2); A nut assembly is threadedly connected to the Z-axis screw rod (3), one end of the nut assembly is slidably connected to the Z-axis guide rail (22), and a grooved clamping block (4) is installed on the outer side of the nut assembly.

8. A tablet tensile strength testing device according to claim 7, characterized in that: The side end of the slotted clamping block (4) is provided with a horizontal slot, and the lower end of the horizontal slot is provided with a downward opening, and the horizontal slot is provided for the outer convex wing side of the upper end of the rod body (5) to enter.

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