A needle tube flow testing device

Abstract

This utility model relates to the field of syringe flow testing technology, and discloses a syringe flow testing device, including: a shell and a pressure gauge. A transparent liquid storage tank is located at the center of the top of the shell. A pressurization tube, a pressure detection tube, a liquid filling tube, and a connecting tube are located on the top of the transparent liquid storage tank. One end of the connecting tube is equipped with a liquid outlet valve, and one end of the liquid outlet valve is equipped with a needle seat connector. One end of the needle seat connector is equipped with a syringe. This utility model achieves fully automated pressure control, liquid filling, and timing through an electronic adjustment knob, a liquid injection pump, and a touch screen, reducing manual intervention. The transparent liquid storage tank and pressure gauge directly display key parameters, and the liquid injection pump maintains a constant liquid level, eliminating liquid level fluctuations and pressure estimation errors. Automated liquid filling, timing, and data recording shorten the single test time, support batch testing, and improve overall efficiency.

Description

Technical Field

[0001] This utility model relates to the field of needle flow testing technology, specifically a needle flow testing device. Background Technology

[0002] A needle flow meter is an instrument specifically designed to measure the flow rate output by a needle in a disposable implantable drug delivery device under a specified pressure. Needle flow meters are an indispensable tool in medical device quality control, providing crucial data support for patient safety, product compliance, and industry innovation by quantifying flow performance.

[0003] For example, an existing Chinese patent (CN103162955A) discloses a syringe flow characteristic tester, comprising: a main unit and a testing machine. The main unit includes a main unit frame and a syringe clamping mechanism, a transmission mechanism, a control unit, a communication module, and a power module mounted on the main unit frame. The transmission mechanism is connected to the syringe clamping mechanism, the power module is connected to the control unit, the communication module, and the transmission mechanism, and the control unit is connected to the communication module and the transmission mechanism. The testing machine includes a balance bracket, an electronic balance, a water tank, and an injection needle. The electronic balance is mounted on the balance bracket, the water tank is mounted on the electronic balance, and the injection needle is mounted in the water tank via the balance bracket. The electronic balance is connected to the communication module via a communication line, and the injection needle is connected to the syringe clamping mechanism via a flexible tube. This invention has a simple structure, low cost, and high degree of intelligence, which can greatly improve the efficiency of testing personnel.

[0004] The aforementioned syringe flow tester uses a balance to measure and calculate parameters for comparison. This method suffers from low automation, large measurement errors, relatively cumbersome operation, and low efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a syringe flow testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a needle flow testing device, comprising: a housing and a pressure gauge; a transparent liquid storage tank is provided at the center of the top of the housing; a pressurizing tube, a pressure detection tube, a liquid filling tube, and a connecting tube are provided at the top of the transparent liquid storage tank; a liquid outlet valve is provided at one end of the connecting tube; a needle seat connector is provided at one end of the liquid outlet valve; a needle tube is provided at one end of the needle seat connector; an external air source interface is connected to one end of the pressurizing tube; a pressure gauge is connected to one end of the pressure detection tube; a liquid injection pump is connected to one end of the liquid filling tube; and one end of the connecting tube can extend into the bottom area of ​​the transparent liquid storage tank.

[0007] Furthermore, a touch screen is provided on one side of the housing, and an electronic adjustment knob and a three-way adjustment valve are also fixed on the same side of the housing. The pressure gauge is fixed on the side of the housing where the touch screen is installed.

[0008] Furthermore, the electronic adjustment knob is electrically connected to a connecting wire, one end of which is electrically connected to the injection pump. The electronic adjustment knob is used to adjust the flow rate of the injection pump and control the start and stop of the injection pump.

[0009] Furthermore, one end of the three-way regulating valve is connected to a pressure regulating knob, one end of the three-way regulating valve is connected to a gas source connecting pipe, one end of the gas source connecting pipe is connected to an external gas source interface, one end of the three-way regulating valve is connected to a pressurizing connecting pipe, and one end of the pressurizing connecting pipe is connected to a pressurizing pipe.

[0010] Furthermore, one end of the liquid filling pipe is connected to a liquid filling connection pipe, one end of the liquid filling connection pipe is connected to the outlet of the liquid injection pump, and one end of the liquid injection pump inlet is provided with an external liquid filling interface.

[0011] Furthermore, a support frame is provided at the center of the top of the outer shell, and the transparent liquid storage tank is fixed inside the support frame.

[0012] Furthermore, a bracket for fixing the dispensing valve is provided on one side of the support frame, and one end of the needle tube is connected to a dispensing hose, with one end of the dispensing hose located inside a measuring cylinder or measuring beaker.

[0013] Furthermore, the touchscreen integrates a timer, and a pressure gauge connecting pipe is provided between the pressure gauge and the pressure detection tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a transparent liquid storage tank, a pressurizing tube, and a pressure detection tube. During syringe flow testing, liquid is first manually added to the transparent storage tank before the test, ensuring the liquid level is flush with the syringe outlet. The outlet valve is closed at this time. Then, an external gas source is connected, and the pressure is adjusted using a gas-liquid adjustment knob to maintain the pressure within the transparent storage tank within the test gas pressure range. After a period of stabilization, the outlet valve is manually opened. When liquid is observed flowing from the syringe, the timer button on the touchscreen is immediately pressed to start the countdown. The injection pump then starts adding liquid to the transparent storage tank. The electronic adjustment knob is observed and adjusted to ensure the liquid level remains flush with the syringe. Once the countdown is complete, the outlet valve is manually closed, the volume of liquid flowing from the syringe is measured, and the data is entered into the test data report to complete the test. This invention achieves fully automated pressure control, liquid addition, and timing through an electronic adjustment knob, a liquid injection pump, and a touchscreen, reducing manual intervention. The transparent storage tank and pressure gauge directly display key parameters, while the liquid injection pump maintains a constant liquid level, eliminating liquid level fluctuations and pressure estimation errors. The modular design and integrated interface simplify operation; users only need to set parameters and click a button to complete the test. Automated liquid addition, timing, and data recording shorten the time for a single test, support batch testing, and improve overall efficiency.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a perspective view of a syringe flow testing device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a syringe flow testing device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a syringe flow testing device according to this utility model from another perspective. Figure 4 This is a perspective view of a syringe flow testing device according to the present invention. Figure 5 This is a front view of a syringe flow testing device according to the present invention; Figure 6 This is a top view of a syringe flow testing device according to the present invention; Figure 7 This is a rear view of the internal structure of a syringe flow testing device according to this utility model.

[0017] In the diagram: 1. Outer casing; 2. Touch screen; 3. Pressure gauge; 4. Electronic adjustment knob; 5. Air pressure adjustment knob; 6. Support frame; 7. Transparent liquid storage tank; 8. Pressurization pipe; 9. Pressure detection pipe; 10. Liquid filling pipe; 11. Connecting pipe; 12. Liquid outlet valve; 13. Needle seat connector; 14. Needle tube; 15. Liquid outlet hose; 16. External liquid filling interface; 17. Injection pump; 18. Connecting wire; 19. Liquid filling connecting pipe; 20. External air source interface; 21. Air source connecting pipe; 22. Three-way regulating valve; 23. Pressurization connecting pipe; 24. Pressure gauge connecting pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1-7This utility model provides a technical solution: a syringe flow rate testing device, comprising: a housing 1 and a pressure gauge 3. The housing 1 serves as the main body of the device, integrating all components and providing structural support and protection. The pressure gauge 3 is fixed to one side of the housing 1, allowing operators to intuitively read the pressure value. A transparent liquid storage tank 7 is located at the center of the top of the housing 1. The transparent liquid storage tank 7 is fixed to the center of the top of the housing 1, and its transparent material facilitates observation of the internal liquid level, ensuring that the liquid level is flush with the outlet of the syringe 14 before the test.

[0020] The top of the transparent liquid storage tank 7 is equipped with a pressurizing pipe 8, a pressure detection pipe 9, a liquid filling pipe 10, and a connecting pipe 11. One end of the connecting pipe 11 is equipped with a liquid outlet valve 12. The pressurizing pipe 8 is connected to an external air source to pressurize the tank. The pressure detection pipe 9 transmits the pressure inside the tank to the pressure gauge 3. The liquid filling pipe 10 replenishes the liquid into the tank through the liquid injection pump 17. The connecting pipe 11 is connected to the liquid outlet valve 12 to control the liquid flow.

[0021] The outlet valve 12 is equipped with a needle seat connector 13 at one end, and a needle tube 14 at the other end. The liquid flow path is connecting pipe 11 → outlet valve 12 → needle seat connector 13 → needle tube 14. The outlet valve 12 can be manually opened and closed to control the start and stop of the test. The needle seat connector 13 is compatible with various needle tubes 14, improving the versatility of the device.

[0022] One end of the pressurization pipe 8 is connected to an external air source interface 20, which is connected to a compressed air or nitrogen source. Air is supplied to the transparent storage tank 7 through the pressurization pipe 8 to establish the required pressure environment for the test. One end of the pressure detection pipe 9 is connected to a pressure gauge 3. The pressure detection pipe 9 transmits the pressure inside the transparent storage tank 7 to the pressure gauge 3, enabling real-time pressure monitoring and ensuring the pressure remains stable within the test range. One end of the liquid filling pipe 10 is connected to a liquid injection pump 17, and one end of the connecting pipe 11 can extend into the bottom area of ​​the transparent storage tank 7. The liquid injection pump 17 replenishes liquid into the transparent storage tank 7 through the liquid filling pipe 10, and the electronic adjustment knob 4 controls its flow rate and start / stop to maintain a constant liquid level.

[0023] A touchscreen 2 is located on one side of the housing 1. An electronic adjustment knob 4 and a three-way regulating valve 22 are also fixed to the same side of the housing 1. A pressure gauge 3 is fixed to the side of the housing 1 where the touchscreen 2 is installed. The touchscreen 2 serves as the human-machine interface, integrating operation buttons, parameter settings, and a timer function. Users can start the test and record the time with a single button press. The electronic adjustment knob 4 controls the flow rate and start / stop of the injection pump 17 via the connecting cable 18. The three-way regulating valve 22 distributes the air source pressure and connects to the air pressure adjustment knob 5, the air source connecting pipe 21, and the pressurization connecting pipe 23.

[0024] The electronic adjustment knob 4 is electrically connected to a connecting wire 18, one end of which is electrically connected to the injection pump 17. The electronic adjustment knob 4 is used to adjust the flow rate of the injection pump 17 and control its start and stop. The electronic adjustment knob 4 sends control signals to the injection pump 17 through the connecting wire 18 to achieve flow rate adjustment and start / stop operation. During the experiment, the operator rotated the electronic adjustment knob 4 to dynamically adjust the flow rate of the injection pump 17, keeping the liquid level flush with the syringe 14 and maintaining a constant pressure.

[0025] One end of the three-way regulating valve 22 is connected to a pressure regulating knob 5, which adjusts the air source pressure via the three-way regulating valve 22. One end of the three-way regulating valve 22 is connected to an air source connection pipe 21, one end of which is connected to an external air source interface 20. The other end of the three-way regulating valve 22 is connected to a pressurizing connection pipe 23, one end of which is connected to a pressurizing pipe 8. The air source connection pipe 21 connects the external air source interface 20 to the three-way regulating valve 22, forming an air path for easy air source access and pressure adjustment. The pressurizing connection pipe 23 transmits the pressure output from the three-way regulating valve 22 to the pressurizing pipe 8, which ultimately enters the transparent storage tank 7 to establish the test pressure.

[0026] One end of the liquid filling pipe 10 is connected to a liquid filling connection pipe 19, and the other end of the liquid filling connection pipe 19 is connected to the outlet of the liquid injection pump 17. The inlet end of the liquid injection pump 17 is equipped with an external liquid filling interface 16. The liquid filling connection pipe 19 connects the outlet of the liquid injection pump 17 to the liquid filling pipe 10, forming a liquid replenishment channel to ensure that the liquid injection pump 17 can accurately add liquid to the tank. The external liquid filling interface 16 is connected to a liquid source such as a saline bottle, allowing the liquid to be drawn by the liquid injection pump 17 and injected into the transparent storage tank 7, thus achieving automated liquid filling.

[0027] A support frame 6 is provided at the top center of the outer casing 1, and the transparent liquid storage tank 7 is fixed inside the support frame 6. The support frame 6 provides stable support for the transparent liquid storage tank 7.

[0028] A bracket for fixing the dispensing valve 12 is provided on one side of the support frame 6. One end of the syringe 14 is connected to a dispensing hose 15, with the other end of the dispensing hose 15 located inside a measuring cylinder or measuring beaker. The dispensing valve 12 is fixed to one side of the support frame 6 by the bracket, allowing the operator to open and close the valve with one hand, simplifying the operation process. The dispensing hose 15 directly guides the liquid flowing from the syringe 14 into the measuring cylinder or measuring beaker, avoiding splashing and facilitating subsequent volume measurement and data recording.

[0029] The touchscreen 2 integrates a timer, and a pressure gauge connecting pipe 24 connects the pressure gauge 3 and the pressure detection tube 9. The touchscreen 2's built-in timer automatically starts a countdown when the user presses a button, simultaneously controlling the injection pump 17 to ensure accurate test timing. The pressure gauge connecting pipe 24 provides a sealed connection between the pressure gauge 3 and the pressure detection tube 9, preventing air leakage that could cause pressure measurement errors and improving data reliability.

[0030] During the syringe flow test, first, manually add liquid to the transparent reservoir 7 before the test, so that the liquid level in the reservoir is flush with the outlet end of the syringe 14. At this time, the outlet valve 12 is closed. Then, start the test by connecting an external gas source and adjusting the pressure through the gas-liquid adjustment knob 5 to keep the pressure in the transparent reservoir 7 within the test gas pressure range and stabilize it for a period of time. Then, manually open the outlet valve 12. When liquid is observed flowing out of the syringe 14, immediately press the timer button on the touch screen 2 to start the countdown. At this time, the injection pump 17 starts to add liquid to the transparent reservoir 7. Observe and rotate the electronic adjustment knob 4 to keep the liquid level flush with the syringe 14. When the countdown is complete, manually close the outlet valve 12, measure the volume of liquid flowing out of the syringe 14, and fill the data into the test data report to complete the test.

[0031] This invention achieves fully automated pressure control, liquid addition, and timing through an electronic adjustment knob 4, a liquid injection pump 17, and a touch screen 2, reducing manual intervention. The transparent storage tank 7 and pressure gauge 3 directly display key parameters, while the liquid injection pump 17 maintains a constant liquid level, eliminating liquid level fluctuations and pressure estimation errors. The modular design and integrated interface simplify operation; users only need to set parameters and click a button to complete the test. Automated liquid addition, timing, and data recording shorten the time for a single test, support batch testing, and improve overall efficiency.

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A needle tubing flow testing device comprising: The outer casing (1) and pressure gauge (3) are characterized in that: a transparent liquid storage tank (7) is provided at the center of the top of the outer casing (1), and a pressurizing pipe (8), a pressure detection pipe (9), a liquid filling pipe (10) and a connecting pipe (11) are provided at the top of the transparent liquid storage tank (7). A liquid outlet valve (12) is provided at one end of the connecting pipe (11), a needle seat connector (13) is provided at one end of the liquid outlet valve (12), a needle tube (14) is provided at one end of the needle seat connector (13), an external air source interface (20) is connected at one end of the pressurizing pipe (8), a pressure gauge (3) is connected at one end of the pressure detection pipe (9), a liquid injection pump (17) is connected at one end of the liquid filling pipe (10), and one end of the connecting pipe (11) can extend into the bottom area of ​​the transparent liquid storage tank (7).

2. A needle tube flow testing apparatus according to claim 1, wherein: The outer casing (1) is provided with a touch screen (2) on one side, and an electronic adjustment knob (4) and a three-way adjustment valve (22) are also fixed on one side of the outer casing (1). The pressure gauge (3) is fixed on the side of the outer casing (1) where the touch screen (2) is installed.

3. A needle tube flow testing apparatus according to claim 2, wherein: The electronic adjustment knob (4) is electrically connected to a connecting wire (18), one end of which is electrically connected to the injection pump (17). The electronic adjustment knob (4) is used to adjust the flow rate of the injection pump (17) and control the start and stop of the injection pump (17).

4. A needle tube flow testing apparatus according to claim 2, wherein: One end of the three-way regulating valve (22) is connected to a pressure regulating knob (5), one end of the three-way regulating valve (22) is connected to a gas source connecting pipe (21), one end of the gas source connecting pipe (21) is connected to an external gas source interface (20), one end of the three-way regulating valve (22) is connected to a pressurizing connecting pipe (23), and one end of the pressurizing connecting pipe (23) is connected to a pressurizing pipe (8).

5. A needle tube flow testing apparatus according to claim 3, wherein: One end of the liquid filling pipe (10) is connected to a liquid filling connection pipe (19), and one end of the liquid filling connection pipe (19) is connected to the outlet of the liquid injection pump (17). The inlet of the liquid injection pump (17) is provided with an external liquid filling interface (16).

6. The needle tube flow testing apparatus of claim 1, wherein: A support frame (6) is provided at the center of the top of the outer shell (1), and the transparent liquid storage tank (7) is fixed inside the support frame (6).

7. A needle tube flow testing apparatus according to claim 6, wherein: The support frame (6) has a bracket on one side for fixing the liquid outlet valve (12), and one end of the needle tube (14) is connected to the liquid outlet hose (15), with one end of the liquid outlet hose (15) located inside the measuring cylinder or measuring beaker.

8. The needle tube flow testing apparatus of claim 2, wherein: The touch screen (2) has a timer integrated inside, and a pressure gauge connecting pipe (24) is provided between the pressure gauge (3) and the pressure detection tube (9).

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