A dosing device for a pharmaceutical powder

Abstract

The utility model discloses a kind of for medicine powder's quantitative sample divider, including electronic balance, electronic balance has weighing area and display area, weighing area is equipped with weighing seat, display area is provided with display screen, further include: sealing unit, sealing unit is set on electronic balance, and with electronic balance and form containing cavity;Weighing bottle, weighing bottle is set on weighing seat;Mounting bracket, mounting bracket is equipped with mounting hole one and mounting hole two;Pushing material unit, pushing material unit is set in mounting hole one, pushing material unit has output, and the output of pushing material unit extends to weighing bottle inside;Feed pipe, feed pipe is set in mounting hole two, feed pipe has feeding end and discharge end, and feeding end of feed pipe is communicated with sample bottle, and discharge end of feed pipe is communicated with pushing material unit.The utility model is equipped with sealing unit, by physical isolation dust, small particle and other pollutants in external air, avoid its adhesion to medicine powder, guarantee the purity and weighing accuracy of medicine powder.

Description

Technical Field

[0001] This utility model relates to the field of electronic balance technology, and in particular to a quantitative sample dispenser for pharmaceutical powder. Background Technology

[0002] An electronic balance is a precision instrument that uses electromagnetic force to balance the weight of an object for weighing. Due to its high precision, it is widely used in laboratories, pharmaceutical manufacturing, and other fields.

[0003] In the prior art, Chinese patent document with authorization announcement number CN206321323U discloses a self-weighing balance and its measuring device, including a body, a base, a barrel, a weight sensor, a weighing sensor, and a control system. The body is located on the base, the control system is used to control the movement of each component, the weighing sensor is used to weigh the target item, a control panel is set on the body, the control panel is connected to the control system, the barrel is located on the body, the barrel contains the chemicals or other items to be weighed, a weight sensor is set at the bottom of the barrel, and multiple discharge ports of different diameters are set at the bottom of the barrel, each discharge port is equipped with a switch. When the user needs to weigh a certain amount of item, the required amount is input on the control panel, and the control system will control the switch set at the discharge port according to the required amount, and the control system will control the discharge port to discharge the item.

[0004] Chinese patent document CN223307674U discloses an electronic balance, belonging to the field of electronic balance technology. It includes: a base and a connecting seat; a top platform is mounted on the top of the base; a weighing seat is mounted at the center of the top of the top platform; a disassembly / assembly mechanism is mounted on the top of the base, and the disassembly / assembly mechanism is plugged into and connected to the connecting seat; the connecting seat and the top platform are sealed together; a frame is mounted on the top of the connecting seat; transparent plates are installed in the front and rear openings of the frame; and transparent sliding plates are slidably connected in the remaining three openings of the frame. This electronic balance, by using the disassembly / assembly mechanism, facilitates quick disassembly and assembly of the connecting seat and the frame on the top platform, making it convenient to place the frame during measurement and improving measurement accuracy.

[0005] Existing electronic balances require a weighing paper to be placed on the weighing pan when weighing medicines. The medicine sample is transferred from the sample bottle to the weighing paper for weighing. During the weighing process, the medicine sample is exposed and prone to moisture absorption, leading to inaccuracies in the weighing. Therefore, it is necessary to improve this structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a quantitative sample divider for pharmaceutical powders, which solves the problem that in existing weighing devices, the drug sample is exposed to the outside and easily absorbs moisture, leading to deviations in weighing accuracy.

[0007] The above-mentioned technical objective of this utility model is achieved by the following technical solution:

[0008] A quantitative sample dispenser for pharmaceutical powder includes an electronic balance with a weighing area and a display area. A weighing base is provided on the weighing area, and a display screen is provided in the display area. The device also includes:

[0009] A sealing unit is mounted on the electronic balance and together with the electronic balance forms a receiving cavity;

[0010] Weighing bottle, which is placed on the weighing base, is used to hold the powder to be weighed;

[0011] The mounting bracket and the sealing unit are located on the weighing area. The mounting bracket has mounting hole one and mounting hole two.

[0012] A feeding unit is provided in the mounting hole 1. The feeding unit has an output end that extends into the weighing bottle.

[0013] The feed pipe is installed in the second mounting hole. The feed pipe has a feed end and a discharge end. The feed end of the feed pipe is connected to the sample bottle, and the discharge end of the feed pipe is connected to the pusher unit. The powder in the sample bottle can be passed into the pusher unit through the feed pipe.

[0014] The present invention is further configured such that: the sealing unit includes two back plates arranged opposite each other and two side plates arranged opposite each other, the two back plates are connected to each other through a top plate, a magnetic seat is provided at the connection between the back plate and the top plate, one end of the side plate is provided with a magnetic block, and the side plate is attracted and engaged with the magnetic seat through the magnetic block.

[0015] A further feature of this invention is that the weighing bottle has a connecting part and an external thread is provided on the outer wall of the mounting part.

[0016] A further feature of this invention is that the mounting bracket includes a mounting plate and support columns, with multiple support columns disposed at the corners of the mounting plate, one end of each support column connected to the mounting plate, and the other end of each support column connected to the top of the electronic balance.

[0017] A further feature of this invention is that the feeding unit includes a sample dispensing tube, one end of which extends into the interior of the weighing bottle. A feeding screw is installed inside the sample dispensing tube, and one end of the feeding screw is connected to a feeding motor. The feeding motor drives the feeding screw to rotate and push the powder in the sample dispensing tube into the weighing bottle.

[0018] A further feature of this invention is that a positioning part is installed on the outer wall of the sample tube, and the inner wall of the positioning part has an internal thread, which engages with the external thread through the internal thread.

[0019] The present invention is further configured such that: one end of the feed tube has a fixing part, the inner wall of the fixing part has two internal threads, and the other end of the feed tube has a bent connecting part.

[0020] A further feature of this invention is that the sample bottle has a connecting part two, and the outer wall of the connecting part two is provided with an external thread two, and the connecting part two cooperates with the internal thread two through the external thread two.

[0021] A further feature of this invention is that the pusher motor is a servo motor or a stepper motor.

[0022] A further feature of this invention is that the display screen is a touch screen, used to assist users in operation.

[0023] In summary, this utility model has the following beneficial effects:

[0024] It is equipped with a sealing unit, which together with the electronic balance forms a sealed cavity that completely covers the weighing area of ​​the electronic balance. By physically isolating dust, tiny particles and other contaminants in the outside air, it prevents them from adhering to the powder and ensures the purity of the powder and the accuracy of weighing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is an exploded view of the sealing unit.

[0027] Figure 3 This is a schematic diagram of the weighing bottle.

[0028] Figure 4 This is a structural diagram of the mounting bracket.

[0029] Figure 5 This is a schematic diagram of the feeding unit.

[0030] Figure 6 This is a schematic diagram of the feed tube and sample bottle.

[0031] Figure 7 This is a cross-sectional view of the present invention.

[0032] Numerical designations: Electronic balance 10, Weighing base 11, Display screen 12, Sealing unit 20, Back plate 21, Magnetic base 211, Side plate 22, Grip part 221, Magnetic block 222, Top plate 23, Weighing bottle 30, Connecting part 1 31, External thread 1 32, Mounting bracket 40, Mounting plate 41, Support column 42, Mounting hole 1 43, Mounting hole 2 44, Pushing unit 50, Sample tube 51, Positioning part 52, Internal thread 1 53, Pushing screw 54, Pushing motor 55, Feed tube 56, Fixing part 57, Internal thread 2 58, Bending connecting part 59, Sample bottle 60, Connecting part 2 61, External thread 2 62. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0034] In existing technologies, electronic balances, as precision weighing instruments, are widely used in the pharmaceutical manufacturing industry. Their core function lies in achieving high-precision measurement through the principle of electromagnetic force balance. However, existing electronic balances are prone to contamination of pharmaceutical powder by environmental dust when weighing drugs, affecting weighing accuracy and drug purity. To address these issues, this application integrates the weighing operation and transmission path into a sealed space, and employs a differential weighing method to eliminate container weight errors.

[0035] like Figure 1 and Figure 7 As shown, this utility model proposes a quantitative sample dispenser for pharmaceutical powder, including an electronic balance 10. The electronic balance 10 has a weighing area and a display area. A weighing base 11 is provided on the weighing area, and a display screen 12 is provided in the display area. Preferably, the display screen 12 is a touch screen. The weighing base 11 is connected to the internal weight sensor of the electronic balance 10. When the pharmaceutical powder is placed on the weighing base 11, the weight of the powder will cause a certain pressure change in the weighing base 11. This pressure change is sensed by the sensor and converted into an electrical signal, which is transmitted to the display screen 12, which can intuitively display the weighing value. A sealing unit 20 is provided on the electronic balance 10 and together with the electronic balance 10 forms a receiving cavity. The sealing unit 20 is used to improve the sealing performance of the electronic balance 10 and prevent dust, small particles and other impurities in the air from entering the weighing area of ​​the electronic balance 10 during the quantitative sample dispensing of pharmaceutical powder.

[0036] Weighing bottle 30 is set on weighing base 11. Weighing bottle 30 is used to hold the powder to be weighed. When in use, the weighing value of the empty weighing bottle 30 is first recorded by electronic balance 10. Then, the powder is added to the weighing bottle 30 and weighed again. The empty bottle value is subtracted from the value of the second weighing to obtain the accurate weighing value of the powder.

[0037] Mounting bracket 40, sealing unit 20 is set on weighing area, mounting bracket 40 has mounting hole 1 43 and mounting hole 2 44, mounting bracket 40 is used to provide support and installation space for pushing unit 50 and feed pipe 56.

[0038] The material pushing unit 50 is disposed in the mounting hole 43. The material pushing unit 50 has an output end that extends into the weighing bottle 30. The material pushing unit 50 is used to push the powder into the weighing bottle 30.

[0039] The feed pipe 56 is located inside the mounting hole 44. The feed pipe 56 has a feed end and a discharge end. The feed end of the feed pipe 56 is connected to the sample bottle 60, and the discharge end of the feed pipe 56 is connected to the pusher unit 50. The powder in the sample bottle 60 can be fed into the pusher unit 50 through the feed pipe 56. The feed pipe 56 can prevent the powder from leaking or being contaminated by the outside during the transmission process and ensure the purity of the powder.

[0040] like Figure 2 As shown, in some embodiments, the sealing unit 20 includes two opposing back plates 21 and two opposing side plates 22. The two back plates 21 are connected to each other by a top plate 23. A magnetic base 211 is provided at the connection between the back plate 21 and the top plate 23. One end of the side plate 22 is provided with a magnetic block 222, and the side plate 22 attracts and engages with the magnetic base 211 through the magnetic block 222. Preferably, a gripping part 221 is provided on the side plate 22. One end of the gripping part 221 is integrally connected to the side plate 22, and the other end of the gripping part 221 extends outward toward the side plate 22. The gripping part 221 is used to provide a grip for the user to easily separate the side plate 22.

[0041] The back plate 21 is a plate-like structure forming the front and rear side walls of the sealing unit 20, used to form the longitudinal support frame of the sealing cavity. The back plate 21 can be made of transparent acrylic sheet. The side plate 22 is a plate-like structure forming the left and right side walls of the sealing unit 20. The side plate 22 can also be made of transparent acrylic sheet, used to seal the opening of the weighing area. The top plate 23 is a transverse plate-like structure connecting the two back plates 21, specifically made of acrylic sheet of the same material as the back plates 21, used to form the top support structure of the sealing unit 20. The magnetic base 211 is a magnetic component installed at the connection between the back plate 21 and the top plate 23, used to provide a magnetic fixing point. The magnetic block 222 is a magnetic component located at the end of the side plate 22, used to form an adsorption fit with the magnetic base 211. The magnetic block 222 and the magnetic base 211 can be made of ferrite magnets. Ferrite magnets have weak magnetic force, making them easy for users to separate. The back plate 21 and the top plate 23 form a support frame, and the side plate 22 is fixed to both sides of the support frame by the attraction between the magnetic block 222 and the magnetic base 211. When it is necessary to disassemble the sealing unit 20, the side plate 22 can be directly separated from the magnetic base 211. During the powder weighing process, the tight fit between the side plate 22 and the back plate 21 and the top plate 23 prevents external dust from entering the weighing area from the side.

[0042] like Figure 3 As shown, in some embodiments, the weighing bottle 30 has a connecting part 31, an external thread 32 is provided on the outer wall of the mounting part, a positioning part 52 is installed on the outer wall of the sample tube 51, and an internal thread 53 is provided on the inner wall of the positioning part 52. The positioning part 52 forms a detachable connection structure by engaging with the external thread 32 through the internal thread 53. After the operation is completed, the weighing bottle 30 and the sample tube 51 can be separated by rotating them in the opposite direction.

[0043] Among them, the connecting part 31 refers to the connecting structure that matches the weighing bottle 30 and the sample tube 51, specifically an annular sleeve made of engineering plastic. The external thread 32 refers to the spiral protrusion structure on the outer wall of the connecting part 31, which is used to engage and lock with the internal thread 53. The positioning part 52 refers to the connecting structure on the sample tube 51, and the internal thread 53 refers to the spiral groove structure on the inner wall of the positioning part 52.

[0044] like Figure 4 As shown, in some embodiments, the mounting bracket 40 includes a mounting plate 41 and support columns 42. Multiple support columns 42 are disposed at the corners of the mounting plate 41, with one end of each support column 42 connected to the mounting plate 41 and the other end connected to the top of the electronic balance 10. The mounting plate 41 refers to the plate structure that supports the pushing unit 50 and the feed pipe 56; it is a component made of acrylic sheet. The mounting plate 41 and the support columns 42 together form a support structure. The mounting plate 41 has a first mounting hole 43 and a second mounting hole 44, which penetrate both the upper and lower ends of the mounting plate.

[0045] like Figure 5 As shown, in some embodiments, the feeding unit 50 includes a sample dispensing tube 51, one end of which extends into the interior of the weighing bottle 30. A feeding screw 54 is provided inside the sample dispensing tube 51, and one end of the feeding screw 54 is connected to a feeding motor 55. The feeding motor 55 drives the feeding screw 54 to rotate and push the powder in the sample dispensing tube 51 into the weighing bottle 30.

[0046] The sample tube 51 is a tubular structure with an inner cavity, which isolates the external environment through the tube wall and serves as a channel for conveying the medicine powder. The pusher screw 54 is a shaft with helical blades that generates axial thrust through rotational motion. The pusher motor 55 is a power device with controllable speed, which can be implemented using a stepper motor or a servo motor. By adjusting the speed, the speed of medicine powder delivery is controlled. The speed of the pusher motor 55 is matched with the screw pitch, so that the amount of medicine powder pushed per unit time can be accurately measured. The pusher motor 55 is electrically connected to the electronic balance 10, which is used to automatically adjust the speed of the pusher motor 55 according to the weighing results and stop pushing when the preset amount of medicine powder is reached.

[0047] like Figure 5 and Figure 6 As shown, in some embodiments, one end of the feed tube 56 has a fixing part 57, and the inner wall of the fixing part 57 has an internal thread 58. The other end of the feed tube 56 has a bent connecting part 59. The sample bottle 60 has a connecting part 61, and the outer wall of the connecting part 61 is provided with an external thread 62. The connecting part 61 engages with the internal thread 58 through the external thread 62.

[0048] The fixing part 57 refers to the connection structure between the feed pipe 56 and the sample bottle 60, specifically implemented using an annular sleeve made of engineering plastic. The second internal thread 58 refers to the spiral groove structure on the inner wall of the fixing part 57, used to engage and lock with the second external thread 62. The bent connection part refers to the bent structure at the end of the feed pipe 56. The second connection part 61 refers to the connection structure at the outlet end of the sample bottle 60, and the second external thread 62 refers to the spiral protrusion structure on the outer wall of the second connection part 61, used to form a sealing fit with the second internal thread 58.

[0049] When in use, when the sample bottle 60 needs to be connected to the feed pipe 56, the sample bottle 60 is rotated to make the external thread 62 and the internal thread 58 engage spirally, generating an axial clamping force to make the end face of the connecting part 61 fit tightly against the inner wall of the fixing part 57, thus preventing pollutants carried by the external air from entering the transmission channel.

[0050] The usage process and principle of this utility model are as follows: The support frame, which is integrally formed by the back plate 21 and the top plate 23, is placed in the weighing area of ​​the electronic balance 10. The side plate 22 is attracted and fixed to the magnetic seat 211 by the magnetic block 222 to form a sealed cavity. The mounting plate 41 is fixed to the top of the electronic balance 10 by the support column 42 of the mounting bracket 40 to ensure that the end of the sample tube 51 of the pushing unit 50 extends into the weighing bottle 30. The sample bottle 60 is rotated so that the external thread 62 engages with the internal thread 58 of the fixing part 57 of the feed tube 56 to form a sealed connection. The weighing bottle (30) 30 is placed on the weighing seat 11. After the electronic balance 10 is zeroed, the mass value of the empty bottle (M1) is recorded as the reference value. The pushing motor 55 is started, and the medicine powder enters the sample tube 51 through the feed tube 56. The pushing screw 54 rotates to push the medicine powder into the weighing bottle 30. The electronic balance 10 monitors the mass change of the weighing seat 11 in real time. When the displayed value reaches the preset target value (M2), the pusher motor 55 stops running. At this time, the actual mass of the powder is ΔM = M2 - M1. After confirming the value through the touch screen, the quantitative sample is dispensed. The weighing bottle 30 and the sample tube 51 are rotated in the opposite direction, and quick disassembly is achieved by the spiral separation of the external thread 32 and the internal thread 53. The side plate 22 and the magnetic seat 211 are then cleaned to prevent powder residue from affecting subsequent use.

[0051] In practical applications, the sampling device proposed in this application is suitable for quantitative sampling of Etrasimod (trade name Vilsipity) powder. By physically isolating dust, fine particles and other contaminants in the external air, it prevents them from adhering to the powder, ensuring the purity and weighing accuracy of the powder. It is especially suitable for processing scenarios where the precision and cleanliness requirements of arginine Etrasimod powder are stringent.

[0052] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0053] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quantitative sample dispenser for pharmaceutical powder, comprising an electronic balance (10), the electronic balance (10) having a weighing area and a display area, a weighing base (11) disposed on the weighing area, and a display screen disposed in the display area, characterized in that, Also includes: A sealing unit is disposed on the electronic balance (10) and together with the electronic balance (10) forms a receiving cavity; Weighing bottle (30), the weighing bottle (30) is disposed on weighing base (11), the weighing bottle (30) is used to contain the powder to be weighed; Mounting bracket (40), the sealing unit is disposed on the weighing area, and mounting bracket (40) is provided with mounting hole one (43) and mounting hole two (44); A feeding unit (50) is disposed in a mounting hole (43), the feeding unit (50) has an output end, and the output end of the feeding unit (50) extends into the weighing bottle (30); Feed pipe (56) is provided in mounting hole two (44). The feed pipe (56) has a feed end and a discharge end. The feed end of the feed pipe (56) is connected to the sample bottle (60), and the discharge end of the feed pipe (56) is connected to the pusher unit (50). The powder in the sample bottle (60) can be fed into the pusher unit (50) through the feed pipe (56).

2. The quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The sealing unit (20) includes two opposing back plates (21) and two opposing side plates (22). The two back plates (21) are connected to each other through a top plate (23). A magnetic seat (211) is provided at the connection between the back plate (21) and the top plate (23). One end of the side plate (22) is provided on a magnetic block (222). The side plate (22) and the magnetic seat (211) attract and cooperate with each other through the magnetic block (222).

3. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The weighing bottle (30) has a connecting part (31), and an external thread (32) is provided on the outer wall of the connecting part.

4. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The mounting bracket (40) includes a mounting plate (41) and support columns (42). Multiple support columns (42) are located at the corners of the mounting plate (41). One end of each support column (42) is connected to the mounting plate (41), and the other end of each support column (42) is connected to the top of the electronic balance (10).

5. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The feeding unit (50) includes a sample dispensing tube (51), one end of which extends into the interior of the weighing bottle (30). A feeding screw (54) is provided inside the sample dispensing tube (51), one end of which is connected to a feeding motor (55). The feeding motor (55) drives the feeding screw (54) to rotate and push the powder in the sample dispensing tube (51) into the weighing bottle (30).

6. A quantitative sample dispenser for pharmaceutical powder according to claim 5, characterized in that, A positioning part (52) is installed on the outer wall of the sample tube (51). The inner wall of the positioning part (52) has an internal thread (53). The positioning part (52) is engaged with the external thread (32) through the internal thread (53).

7. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The feed tube (56) has a fixing part (57) at one end, and the inner wall of the fixing part (57) has an internal thread (58). The feed tube (56) has a bent connection part (59) at the other end.

8. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The sample bottle (60) has a connecting part two (61), and the outer wall of the connecting part two (61) is provided with an external thread two (62). The connecting part two (61) is engaged with the internal thread two (58) through the external thread two (62).

9. A quantitative sample dispenser for pharmaceutical powder according to claim 5, characterized in that, The pusher motor (55) is a servo motor or a stepper motor.

10. A quantitative sample dispenser for pharmaceutical powder according to claim 1, characterized in that, The display screen (12) is a touch display screen (12), which is used to assist users and staff in operation.

Images