Filling device with non-return needle head
By using a check needle with a Tesla valve structure in the filling device, the problem of the needle returning after the valve is closed is solved, high-precision filling and stable drug liquid delivery are achieved, and the requirements of GMP are met.
Patent Information
- Application Number
- CN202422114103.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The needles of the existing filling device will cause a return phenomenon after the valve is closed, affecting the filling accuracy and interfering with the accuracy of the weighing device.
The check needle with Tesla valve structure is adopted to generate strong countercurrent resistance through the fine internal flow channel design, which can increase the one-way flow rate and effectively curb the return of the pharmaceutical liquid.
It significantly improves filling accuracy, reduces material waste, ensures the uniformity of each batch of products, complies with the strict requirements of GMP, and ensures the stability and accuracy of drug liquid delivery.
Smart Images
Figure CN223016498U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filling equipment, in particular to a filling device with a check needle head. Background Art
[0002] In the modern pharmaceutical and chemical industries, the precision filling technology of liquid medicine filling machines is one of the core technologies to ensure the uniformity and safety of products. To meet the filling accuracy requirements, the filling system integrates high-precision weighing devices and precision control valves, aiming to achieve the ultimate precision in liquid medicine dispensing. As a core component of a precision filling machine, the high-precision weighing device uses highly sensitive sensors and advanced algorithms to monitor the quality changes during the filling process in real time, ensuring precise control of the filling volume. These devices can respond within milliseconds, minimizing human errors and improving filling efficiency and product qualification rates. However, even with such a high-precision monitoring system, the full performance of the system still highly depends on the precise synchronization with the filling execution element - the valve. Any slight time difference or action deviation may affect the final filling accuracy, especially when dealing with high-value or highly sensitive drugs, this impact is particularly significant.
[0003] In actual operation, due to factors such as mechanical response time, control system delay, and physical properties of the liquid medicine, it is difficult to achieve a perfect time match between the valve and the weighing system, which brings uncertainty to the filling accuracy. Especially at the needle head, the terminal execution component of precision filling, the phenomenon of liquid backflow is particularly troublesome. Even after the valve closing instruction is issued, due to the inertia of the liquid medicine and the non-instantaneous nature of the needle head closing mechanism, some liquid medicine will still continue to flow out and backflow, resulting in a deviation between the actual filling volume and the predetermined volume. This liquid backflow not only affects the filling accuracy, causing material waste, but also interferes with the accurate measurement of the weighing device, thus affecting the accuracy of production data and the consistency between batches. Summary of the Utility Model
[0004] Therefore, the technical problem to be solved by the utility model is that the needle head of the filling device in the prior art will produce a backflow phenomenon after the valve is closed, affecting the filling accuracy and interfering with the accuracy of the weighing device, so as to provide a filling device with a check needle head.
[0005] To solve the above technical problems, the technical solution of the utility model is as follows:
[0006] A filling device with a check needle head includes a filling machine, a filling device connected to the filling machine, and a driving structure connected to the filling device;
[0007] The filling device includes a filling needle head and a delivery pipe connected to one end of the filling needle head and connected to a liquid medicine source, and the filling needle head is a check needle head with a Tesla valve structure inside;
[0008] The driving structure comprises a peristaltic pump arranged on the delivery tube and a driving member suitable for driving the peristaltic pump to start operation and shut down operation.
[0009] Furthermore, the filling machine is provided with a bracket suitable for supporting the conveying pipe.
[0010] Furthermore, the bracket is vertically fixed on the filling machine, and a vertical clamping arm is longitudinally arranged on one end of the bracket away from the filling machine, and the vertical clamping arm is suitable for supporting the conveying pipe.
[0011] Furthermore, a horizontal clamping arm is transversely arranged on the bracket, and the filling needle is arranged on the horizontal clamping arm.
[0012] Furthermore, a limiting hole is provided on the horizontal clamp arm, and the filling needle is installed in the limiting hole.
[0013] Furthermore, the filling needle is provided with a hanging ear.
[0014] Furthermore, a distance sensor is provided on the horizontal clamping arm near the bottom of the filling machine.
[0015] Furthermore, the filling machine is provided with a limiting structure suitable for placing medicine bottles, and the non-return needle is located directly above the limiting structure.
[0016] Furthermore, the limiting structure is a clamping limiting seat fixedly mounted on the filling machine.
[0017] Furthermore, the filling machine is provided with a weighing structure located at the bottom of the clamping limit seat.
[0018] The technical solution of the utility model has the following advantages:
[0019] 1. The filling device with a check needle provided by the utility model, when the filling is completed and the valve is closed, the filling needle with a Tesla valve inside generates a strong backflow resistance due to its fine internal flow channel design, thereby achieving an increase in the unidirectional flow rate and effectively curbing the backflow phenomenon of the drug solution due to inertia. This not only significantly improves the filling accuracy and reduces material waste, but also further ensures the uniformity of each batch of products, meets the strict requirements of GMP (Good Manufacturing Practice), and cooperates with the use of a peristaltic pump to ensure the stability and accuracy of drug delivery.
[0020] 2. The filling device with a check needle provided by the utility model has a bracket vertically fixed on the filling machine, and a vertical clamp arm is longitudinally arranged on one end of the bracket away from the filling machine, and the vertical clamp arm is suitable for supporting the delivery pipe. In this way, the delivery pipe is supported by the vertical clamp arm, which can prevent the delivery pipe from curling and affecting the normal liquid discharge.
[0021] 3. The filling device with a check needle provided by the present utility model has a limit hole formed in the horizontal clamping arm, and the filling needle is installed in the limit hole. With such a setting, by installing the filling needle in the limit hole, the filling needle can be limited, ensuring the stability of the filling needle when injecting the liquid medicine.
[0022] 4. The filling device with a check needle provided by the present utility model has a hanging ear provided on the filling needle. With such a setting, the filling needle can be limited through the hanging ear, preventing the filling needle from slipping out of the limit hole on the horizontal clamping arm due to gravity when filled with liquid medicine.
[0023] 5. The filling device with a check needle provided by the present utility model has a distance sensor provided at the bottom of the horizontal clamping arm close to the filling machine. With such a setting, the distance between the filling needle and the liquid level in the medicine bottle during can filling can be monitored in real time through the sensor, facilitating the adjustment of the needle to the optimal position, which not only avoids the pollution and waste caused by liquid medicine splashing but also ensures the safety and continuity of the filling process.
[0024] 6. The filling device with a check needle provided by the present utility model has a limiting structure as a clamping and limiting seat fixedly installed on the filling machine. With such a setting, by limiting and fixing the medicine bottle on the filling machine through the clamping and limiting seat, the stability and firmness of the medicine bottle can be ensured, preventing the medicine bottle from shifting or toppling during filling. Description of the Drawings
[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0026] Figure 1 It is a schematic structural diagram of the filling device with a check needle provided by an embodiment of the present utility model;
[0027] Figure 2 It is a schematic structural diagram of the filling needle provided by an embodiment of the present utility model.
[0028] Description of the reference numerals: 1, filling machine; 2, limiting structure; 3, bracket; 4, vertical clamping arm; 5, horizontal clamping arm; 6, delivery pipe; 7, filling needle; 8, hanging ear; 9, weighing structure; 10, medicine bottle. Detailed Embodiments
[0029] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.
[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] In addition, the technical features involved in 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] As Figure 1-2 shown, a filling device with a check valve needle includes a filling machine 1, a filling device connected to the filling machine 1, and a driving structure connected to the filling device; the filling device includes a filling needle 7 and a delivery pipe 6 connected to one end of the filling needle 7 and connected to a liquid medicine source, and the filling needle 7 is a check valve needle with a Tesla valve structure inside; the driving structure includes a peristaltic pump provided on the delivery pipe 6 and a driving member adapted to drive the peristaltic pump to start and stop running.
[0034] This filling device with a check needle realizes the improvement of the one-way flow rate by generating a strong reverse flow resistance through the fine flow channel design inside the filling needle 7 with a Tesla valve inside at the moment when the filling is completed and the valve is closed. It effectively curbs the backflow phenomenon of the liquid medicine caused by inertia, which not only significantly improves the filling accuracy, reduces material waste, but also further ensures the uniformity of each batch of products, meets the strict requirements of GMP (Good Manufacturing Practice), and cooperates with the use of a peristaltic pump to jointly ensure the stability and accuracy of the liquid medicine transportation.
[0035] In this embodiment, a bracket 3 suitable for supporting the delivery pipe 6 is provided on the filling machine 1. Specifically, the bracket 3 is vertically fixed on the filling machine 1, and a vertical clamping arm 4 is longitudinally arranged at one end of the bracket 3 away from the filling machine 1, and the vertical clamping arm 4 is used to support the delivery pipe 6. With this setting, by supporting the delivery pipe 6 with the vertical clamping arm 4, the curling of the delivery pipe 6 can be avoided, which affects the normal liquid discharge.
[0036] In this embodiment, a horizontal clamping arm 5 is also horizontally arranged on the bracket 3, and the filling needle 7 is arranged on the horizontal clamping arm 5. A limiting hole is opened on the horizontal clamping arm 5, and the filling needle 7 is installed in the limiting hole. With this setting, by installing the filling needle 7 in the limiting hole, the filling needle 7 can be limited, ensuring the stability of the filling needle 7 when injecting the liquid medicine. Specifically, the horizontal clamping arm 5 is installed on the bracket 3 through a sliding seat, and the sliding seat can drive the horizontal clamping arm 5 to move up and down along the height direction of the bracket 3.
[0037] In this embodiment, an ear 8 is provided on the filling needle 7. With this setting, the filling needle 7 can be limited through the ear 8, avoiding the filling needle 7 from slipping out of the limiting hole on the horizontal clamping arm 5 due to gravity when it is full of liquid medicine.
[0038] In this embodiment, a distance sensor is arranged at the bottom of the horizontal clamping arm 5 close to the filling machine 1. With this setting, the distance between the filling needle 7 and the liquid level in the medicine bottle 10 during can filling can be monitored in real time through the sensor, facilitating the adjustment of the needle to the optimal position, which not only avoids the pollution and waste caused by the splashing of the liquid medicine, but also ensures the safety and continuity of the filling process.
[0039] In this embodiment, a limiting structure 2 suitable for placing the medicine bottle 10 is provided on the filling machine 1, and the check needle is located directly above the limiting structure 2. Specifically, the limiting structure 2 is a clamping and limiting seat fixedly installed on the filling machine 1. With this setting, by limiting and fixing the medicine bottle 10 on the filling machine 1 through the clamping and limiting seat, the stability and firmness of the medicine bottle 10 can be ensured, avoiding the displacement or tipping of the medicine bottle 10 during filling.
[0040] In this embodiment, the filling machine 1 is provided with a weighing structure 9 located at the bottom of the clamping limit seat. Specifically, the weighing structure 9 is a precision weighing machine.
[0041] To sum up, in this filling device with a check needle, at the moment when filling is completed and the valve is closed, the filling needle 7 with a Tesla valve inside generates a strong backflow resistance due to its fine internal flow channel design, thereby achieving an increase in the unidirectional flow rate and effectively curbing the backflow of the drug solution due to inertia. This not only significantly improves the filling accuracy and reduces material waste, but also further ensures the uniformity of each batch of products, meets the strict requirements of GMP (Good Manufacturing Practice), and cooperates with the use of a peristaltic pump to ensure the stability and accuracy of drug delivery.
[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A filling device with a non-return needle, characterized in that: It comprises a filling machine (1), a filling device connected to the filling machine (1), and a driving structure connected to the filling device; The filling device comprises a filling needle (7) and a delivery tube (6) connected to one end of the filling needle (7) and connected to a source of liquid medicine, wherein the filling needle (7) is a check needle having a Tesla valve structure inside; The driving structure comprises a peristaltic pump arranged on the delivery pipe (6) and a driving member suitable for driving the peristaltic pump to start operation and shut down operation.
2. The filling device with a non-return needle according to claim 1, characterized in that: The filling machine (1) is provided with a bracket (3) suitable for supporting the conveying pipe (6).
3. The filling device with a non-return needle according to claim 2, characterized in that: The support (3) is vertically fixed on the filling machine (1), and a vertical clamping arm (4) is longitudinally arranged on one end of the support (3) away from the filling machine (1), and the vertical clamping arm (4) is suitable for supporting the conveying pipe (6).
4. The filling device with a non-return needle according to claim 3, characterized in that: A horizontal clamping arm (5) is transversely arranged on the bracket (3), and the filling needle (7) is arranged on the horizontal clamping arm (5).
5. The filling device with a non-return needle according to claim 4, characterized in that: The horizontal clamp arm (5) is provided with a limiting hole, and the filling needle (7) is installed in the limiting hole.
6. The filling device with a non-return needle according to claim 5, characterized in that: The filling needle (7) is provided with a hanging ear (8).
7. The filling device with a non-return needle according to claim 6, characterized in that: The horizontal clamping arm (5) is provided with a distance sensor near the bottom of the filling machine (1).
8. The filling device with a non-return needle according to claim 1, characterized in that: The filling machine (1) is provided with a limiting structure (2) suitable for placing a medicine bottle (10), and the non-return needle is located directly above the limiting structure (2).
9. The filling device with a non-return needle according to claim 8, characterized in that: The limiting structure (2) is a clamping limiting seat fixedly mounted on the filling machine (1).
10. The filling device with a non-return needle according to claim 9, characterized in that: The filling machine (1) is provided with a weighing structure (9) located at the bottom of the clamping limit seat.