Flow testing device

Abstract

The utility model relates to the technical field of medical apparatus and instruments, and provides a flow testing device which comprises a water storage tank, a flow meter and a flow meter, an inlet of the constant liquid level tank is communicated with an outlet of the water storage tank through a connecting pipe, and when the switch is turned on, the experimental water in the water storage tank flows into the constant liquid level tank through the connecting pipe; an overflow port is formed in the side wall, close to the top, of the constant-liquid-level tank, and when the water level in the constant-liquid-level tank exceeds the overflow port, redundant experimental water is discharged through the overflow port, so that the water level of the constant-liquid-level tank is kept constant; one end of the test hose is connected with the outlet of the constant liquid level tank; and the test connector is connected with one end, far away from the constant liquid level tank, of the test hose and is used for connecting a tested medical pipeline. Compared with the prior art, the flow testing device provided by the utility model has the advantages that the whole flow testing device is simple and effective in design and operation method, software and electronic components do not need to be matched for use, and the flow testing device is more friendly to operators.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a flow testing arrangement. BACKGROUND

[0002] The flow detection of medical pipeline such as egg extraction needle, epidural anesthesia catheter etc. is according to the recommended national standard GB / T15812.1-2005 Nonvascular Catheter Part 1: General Performance Test Method, and the test method is designed according to the principle in the catheter water flow test method in appendix E of the standard, which stipulates the general performance test method of nonvascular catheter under the clinical use state, to ensure the consistency of catheter performance evaluation. The standard is not applicable to intravascular catheter. The method describes the principle of constant liquid level water tank in detail, which is the equipment for testing the flow performance of catheter. The design of constant liquid level water tank is to keep the water level constant and the internal pressure consistent during the test, so as to accurately measure the water flow of catheter. This test is very important for evaluating the flow characteristics of catheter, because the flow performance of catheter directly affects the efficiency and safety of drug delivery. The constant liquid level water tank is usually equipped with a water supply pipe and a device with a connector for connecting the catheter. During the test, the water in the water tank flows through the catheter and is collected by a measuring cylinder or a collection container with a weight accuracy of ±1%. The test result is expressed in milliliter per minute, reflecting the water flow of the catheter. The common flow testers on the market are similar in design, such as the medical instrument flow tester and catheter flow tester produced by Dikorui Company. The design of these test equipment helps to ensure the quality and performance of medical catheter, so as to ensure the safety and treatment effect of patients. Through standard-compliant testing, medical device manufacturers can verify whether their medical pipeline products such as egg extraction needle, epidural anesthesia catheter etc. meet industry standards and safety requirements.

[0003] However, the existing flow tester requires high skills of the operator, because the device uses software and electronic components for cooperation, making the operation more complex. The operator not only needs to be familiar with the measurement principle, but also needs to be familiar with the software control of the device, making the operation more tedious and requiring professional training before use. UTILITY MODEL CONTENT

[0004] Therefore, the technical problem to be solved by the utility model is that the flow tester in the prior art uses software and electronic components for cooperation, making the operation more complex. The operator not only needs to be familiar with the measurement principle, but also needs to be familiar with the software control of the device, making the operation more tedious and requiring professional training before use, so as to provide a flow testing arrangement.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0006] The utility model provides a flow testing device, include: water storage jar, the outlet of water storage jar is provided with switch, constant liquid level jar, the inlet of constant liquid level jar is linked with the outlet of water storage jar through the connecting pipe, when the switch opens, the experimental water in water storage jar flows into constant liquid level jar through the connecting pipe, the lateral wall of constant liquid level jar near top is provided with overflow, when the water level in constant liquid level jar exceeds overflow, the experimental water of redundancy is discharged through overflow, so that the water level of constant liquid level jar keeps constant, test hose, one end is linked with the outlet of constant liquid level jar, test connector, with the one end of test hose far from constant liquid level jar is connected for connecting the medical pipeline of being tested.

[0007] Further, the flow testing device further includes a test rack having an upper work plane and a lower work plane at different heights; the constant liquid level tank is arranged on the upper work plane; the test hose naturally droops and is partially arranged on the lower work plane.

[0008] Further, the flow testing device further includes an overflow hose, one end of the overflow hose is connected with the overflow, and the other end naturally droops.

[0009] Further, the flow testing device further includes a wastewater tank or a water bucket for collecting the experimental water flowing out from the overflow hose.

[0010] Further, the height difference between the water storage tank and the overflow is in the range of 200mm-400mm.

[0011] Further, the diameter of the water storage tank is in the range of 215mm-235mm; the height of the water storage tank is in the range of 215mm-235mm.

[0012] Further, the lateral distance between the water storage tank and the constant liquid level tank is in the range of 0.3m-0.8m.

[0013] Further, the inner diameter of the test hose is 10mm.

[0014] Further, the test connector is a 6% Luer female connector.

[0015] Further, the experimental water in the water storage tank and the constant liquid level tank is purified water, and the temperature range is 23±1℃.

[0016] The utility model technical scheme has the following advantages:

[0017] The utility model provides a flow testing device, water storage tank and constant liquid level tank are connected through the connecting pipe, and the outlet of water storage tank is equipped with the switch, when the switch opens, can make the experimental water in water storage tank flow into constant liquid level tank through the connecting pipe, and, because constant liquid level tank is equipped with overflow on the side wall close to the top, when the water level in constant liquid level tank exceeds overflow, the experimental water of redundancy is discharged through overflow, thereby can make the water level of constant liquid level tank keep constant, so that the water body can keep constant speed when flowing out through test hose and test connector, is favorable to the precision of test is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the following will be briefly introduced to the drawing needed to be used in the specific embodiment or prior art description, obviously, the drawing in the following description is some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0019] Figure 1 It is the schematic view of the flow testing device in the embodiment of the utility model.

[0020] Mark explanation:

[0021] 1, water storage tank;2, switch;3, connecting pipe;4, constant liquid level tank;5, overflow;6, overflow hose;7, test hose;8, test connector;9, test frame;10, upper work plane;11, lower work plane. Specific embodiments

[0022] The technical scheme of the utility model will be described clearly and completely in the following in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the range of protection of the utility model.

[0023] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it needs to explain, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0026] As Figure 1 As shown in the utility model provides a flow test device, comprising: water storage tank 1, the outlet of the water storage tank 1 is provided with switch 2;Constant liquid level tank 4, the inlet of the constant liquid level tank 4 is communicated with the outlet of the water storage tank 1 through connecting pipe 3, when the switch 2 is opened, the experimental water in the water storage tank 1 flows into the constant liquid level tank 4 through the connecting pipe 3;The side wall near the top of the constant liquid level tank 4 is provided with overflow port 5, when the water level in the constant liquid level tank 4 exceeds the overflow port 5, the excess experimental water is discharged through the overflow port 5, so that the water level of the constant liquid level tank 4 remains constant;Test hose 7, one end is connected with the outlet of the constant liquid level tank 4;Test connector 8, connected with the end of the test hose 7 away from the constant liquid level tank 4, for connecting the medical pipeline to be tested.

[0027] The flow testing device provided by the embodiment is characterized in that the water storage tank 1 is connected with the constant liquid level tank 4 through the connecting pipe 3, the outlet of the water storage tank 1 is provided with the switch 2, when the switch 2 is opened, the experimental water in the water storage tank 1 can flow into the constant liquid level tank 4 through the connecting pipe 3, and the overflow port 5 is arranged on the side wall close to the top of the constant liquid level tank 4, when the water level in the constant liquid level tank 4 exceeds the overflow port 5, the excessive experimental water is discharged through the overflow port 5, so that the water level in the constant liquid level tank 4 can be kept constant, and the speed of the water body flowing out through the test hose 7 and the test connector 8 can be kept constant, which is beneficial to improve the testing accuracy. Moreover, compared with the prior art, the whole flow testing device is simple and effective in design and operation method, does not need to be used with software and electronic components, and is more friendly to the operator.

[0028] The flow testing device further comprises a test frame 9, the test frame 9 has an upper working plane 10 and a lower working plane 11 at different heights, the constant liquid level tank 4 is arranged on the upper working plane 10, and the test hose 7 naturally droops and is partially arranged on the lower working plane 11. For example, the test frame 9 can be composed of a plurality of horizontally and vertically connected rods to form an overall L-shaped frame, and then a flat plate can be laid on the top and near the bottom to form the upper working plane 10 and the lower working plane 11.

[0029] The flow testing device further comprises an overflow hose 6, one end of the overflow hose 6 is connected with the overflow port 5, and the other end of the overflow hose 6 naturally droops.

[0030] The flow testing device further comprises a wastewater tank or a water bucket for collecting the experimental water flowing out of the overflow hose 6.

[0031] The height difference between the water storage tank 1 and the overflow port 5 ranges from 200 mm to 400 mm.

[0032] The diameter of the water storage tank 1 ranges from 215 mm to 235 mm, and the height of the water storage tank 1 ranges from 215 mm to 235 mm.

[0033] The horizontal distance between the water storage tank 1 and the constant liquid level tank 4 ranges from 0.3 m to 0.8 m.

[0034] The inner diameter of the test hose 7 is 10 mm.

[0035] The test connector 8 is a 6% Luer female connector.

[0036] The experimental water in the water storage tank 1 and the constant liquid level tank 4 is purified water, and the temperature ranges from 23±1℃.

[0037] Specifically, before the flow rate test, prepare at least 5L of purified laboratory water at a temperature of 23±1℃. Rotate switch 2 to the 90° off position and add purified water to the constant liquid level tank 4 until the liquid level reaches the overflow port 5. The water storage tank 1 can be selected with a diameter and height between 215mm and 235mm. Preferably, the diameter and height of the water storage tank 1 are 225mm. Filling the water storage tank 1 will result in approximately 2.85 liters. To prevent overflow, fill it to about 80% capacity, i.e., 2.2 liters. The other constant liquid level tank 4, due to the overflow hose 6, will also not be filled completely. After emptying the water storage tank 1, pour the remaining water into the constant liquid level tank 4, which will consume exactly 5 liters of laboratory water.

[0038] The water storage tank 1 can be placed on a working plane approximately 200mm-400mm above the overflow port 5. This working plane can be provided by a different structural component than the test frame 9, or the water storage tank 1 can be suspended. For example, the height difference between the water storage tank 1 and the overflow port 5 can be 300mm, as a person's height is generally around 1.7 meters; too high and it's difficult to place; too low and the water pressure is insufficient. The lateral distance between the water storage tank 1 and the constant liquid level tank 4 can be 0.3-0.8 meters, preferably 0.5 meters. 0.3 meters is too close, making it easy to bump into the higher water storage tank 1 during experiments; more than 0.8 meters makes it inconvenient to adjust the water flow switch 2. Therefore, 0.5 meters is preferred, ensuring no bumping during operation, easy operation of the water flow switch 2 on the water storage tank 1, and allowing the connecting pipe 3 to be horizontally extended. The length of the connecting pipe 3 should not be too long to avoid a noticeable bending or drooping appearance; for example, the length of the connecting pipe 3 can be 1 meter.

[0039] The overflow hose 6 is placed naturally, and its end is connected to the wastewater tank or a bucket to catch the overflowing test water. The test hose 7 is placed naturally on the lower working plane 11 of the test frame 9. At this time, the size of the test hose 7 can be designed so that the distance between the test connector 8 and the overflow port 5 is exactly 1 meter.

[0040] The inner diameter of the test tubing 7 can be 10mm, and the test connector 8 can preferably be a 6% Luer female connector. This type of connector 8 offers high standardization, allows for quick connection, and provides a safe, reliable, and convenient connection, thus improving its versatility. The medical tubing being tested can be connected to this test connector 8 via its male Luer connector.

[0041] During the test, switch 2 can be rotated slowly. At this time, water will start to overflow from the test product and the overflow hose 6. Switch 2 does not need to be turned to the maximum position. A small amount of water will continue to overflow from the overflow hose 6 and the water level at the overflow port 5 should remain constant. At this time, the water flow rate of the test product can be measured.

[0042] In summary, the flow testing device in this application is simple and effective in design and operation, requires no high-level maintenance and upkeep, and can stably measure the flow rate of water in a conduit. It has the advantages of low equipment cost, simple design, low maintenance and upkeep costs, easy operation, rapid measurement, and accurate measurement.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A flow rate testing device, characterized in that, include: A water storage tank (1) is provided with a switch (2) at its outlet; A constant liquid level tank (4) is provided. The inlet of the constant liquid level tank (4) is connected to the outlet of the water storage tank (1) through a connecting pipe (3). When the switch (2) is opened, the experimental water in the water storage tank (1) flows into the constant liquid level tank (4) through the connecting pipe (3). An overflow port (5) is provided on the side wall near the top of the constant liquid level tank (4). When the water level in the constant liquid level tank (4) exceeds the overflow port (5), the excess experimental water is discharged through the overflow port (5) so that the water level in the constant liquid level tank (4) remains constant. The test hose (7) is connected at one end to the outlet of the constant liquid level tank (4); The test connector (8) is connected to the end of the test hose (7) away from the constant liquid level tank (4) and is used to connect the medical tubing to be tested.

2. The flow rate testing device according to claim 1, characterized in that, It also includes a test fixture (9) having an upper working plane (10) and a lower working plane (11) at different heights; The constant liquid level tank (4) is disposed on the upper working plane (10); The test hose (7) hangs down naturally and is partially positioned on the lower working plane (11).

3. The flow rate testing device according to claim 1, characterized in that, It also includes an overflow hose (6), one end of which is connected to the overflow port (5), and the other end is naturally hanging down.

4. The flow rate testing device according to claim 3, characterized in that, It also includes a wastewater tank or bucket for collecting experimental water flowing out from the overflow hose (6).

5. The flow rate testing device according to claim 1, characterized in that, The height difference between the water storage tank (1) and the overflow port (5) is 200mm-400mm.

6. The flow rate testing device according to claim 1, characterized in that, The diameter of the water storage tank (1) ranges from 215mm to 235mm; The height of the water storage tank (1) ranges from 215mm to 235mm.

7. The flow rate testing device according to claim 1, characterized in that, The lateral distance between the water storage tank (1) and the constant liquid level tank (4) is 0.3m-0.8m.

8. The flow rate testing device according to claim 1, characterized in that, The inner diameter of the test hose (7) is 10 mm.

9. The flow rate testing device according to claim 1, characterized in that, The test connector (8) is a 6% Luer female connector.

10. The flow rate testing device according to claim 1, characterized in that, The experimental water in the water storage tank (1) and the constant liquid level tank (4) is purified water, and the temperature range is 23±1℃.

Images