Syringe sliding performance testing device and testing method

Abstract

The present invention discloses a device and method for testing the sliding performance of a syringe, wherein the testing device comprises: a bracket, on which a first clamp mechanism for mounting a syringe barrel is provided; an adjusting frame, located above the bracket, on which a second clamp mechanism for mounting a core rod of the syringe is provided, and the spacing between the adjusting frame and the bracket is adjustable; a water tank, located on one side of the bracket; a connecting pipe, a first end of which is connected to a cone head of the syringe located on the bracket, and a second end of which is connected to the water tank. The testing device of the present invention has high testing accuracy and efficiency, and the testing method is simple and easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of syringe performance testing, in particular to a syringe sliding performance testing device and a testing method. Background Art

[0002] The sliding performance of a syringe is a relatively important performance of a syringe. Therefore, before a syringe is put on the market, its sliding performance must be tested. In the prior art, there are already special syringe sliding performance testing devices. However, the existing testing devices cannot perform accurate tests, and the test results are not accurate enough. When the existing syringe sliding performance testing devices are used for specific tests, the syringes are inverted, that is, the core rod is set downward. When the test is performed, the core rod needs to be pushed upward from the bottom to discharge the liquid in the syringe barrel. During this process, the static pressure generated by the liquid in the syringe barrel will have a certain influence on the sliding force of the core rod, resulting in low test accuracy of the syringe. In addition, the test conditions in the test method used are quite different from the clinical conditions, resulting in low accuracy of the test results.

[0003] Therefore, the present application is dedicated to providing a novel syringe sliding performance testing device and testing method. Summary of the invention

[0004] The purpose of the present invention is to provide a syringe sliding performance testing device and a testing method. The testing device has high testing accuracy and efficiency, and the testing method is simple and easy to operate.

[0005] The technical solution provided by the present invention is as follows:

[0006] A device for testing the sliding performance of a syringe comprises: a bracket, on which a first clamp mechanism for mounting a syringe barrel is provided; an adjusting frame, located above the bracket, on which a second clamp mechanism for mounting a core rod of the syringe is provided, and the spacing between the adjusting frame and the bracket is adjustable; a water tank, located on one side of the bracket; a connecting pipe, a first end of which is connected to a cone head of the syringe located on the bracket, and a second end of which is connected to the water tank.

[0007] Preferably, the second end of the connecting tube is freely placed in the water tank; and / or; a needle is provided at the second end of the connecting tube, and the head of the needle is vertically arranged downward in the water tank; and / or; a cover body is provided at the upper end of the water tank, and a through hole is provided in the middle area of ​​the cover body for the connecting tube to pass through.

[0008] Preferably, the water tank is arranged on an adjustable base, and the output end of the adjustable base is provided with a support plate for mounting the water tank; and / or; it also includes a horizontal ruler, and the horizontal ruler is arranged between the syringe barrel and the water tank.

[0009] Preferably, the syringe sliding performance testing device also includes a horizontal ruler arranged between the syringe barrel and the water tank, and the horizontal ruler is horizontally arranged on the output end of a vertical adjustment mechanism, and the vertical adjustment mechanism is used to adjust the height of the horizontal ruler.

[0010] Preferably, a liquid level sensor is provided in the water tank, and the liquid level sensor is communicatively connected to a controller, and the controller is also communicatively connected to the vertical adjustment mechanism. The controller controls the vertical adjustment mechanism to adjust the height of the horizontal scale through the liquid level data obtained by the liquid level sensor.

[0011] Preferably, the bracket includes a base plate, a top plate and a plurality of columns, the first end of each column is fixed to the base plate, the second end of each column is provided with an external thread, the top plate is passed through the second end of the column, and a pair of nuts are respectively threadedly connected at the second ends of a pair of columns, and the pair of nuts are located on both sides of the top plate to fix the top plate to the second end of the column.

[0012] In this embodiment, the adjustment frame is communicatively connected to a controller, and the controller controls the height of the adjustment frame according to parameters such as the nominal capacity of the syringe.

[0013] A method for testing the sliding performance of a syringe comprises the steps of: S10: vertically arranging the syringe with the core rod of the syringe facing upward, installing the syringe barrel of the syringe by a first clamping mechanism, installing the core rod of the syringe by a second clamping mechanism, and connecting the cone head of the syringe to a water tank through a connecting pipe;

[0014] S20: adjusting the relative positions of the water tank and the syringe so that the liquid level in the water tank and the axial midpoint of the syringe barrel of the syringe are located on the same plane;

[0015] S30: Press down the core rod of the syringe to move the reference line of the core rod to the zero scale line of the syringe barrel, exhaust the air in the syringe barrel, and set the force value recorder to zero;

[0016] S40: Pull the core rod of the syringe upward until the reference line of the core rod moves to the nominal scale capacity line on the syringe, and reset the force value recorder to zero again;

[0017] S50: After waiting for a preset time, the core rod is pressed down to move its reference line to the zero scale line of the syringe;

[0018] S60: reading the data on the force recorder, and calculating the sliding performance of the syringe according to the data recorded by the force recorder.

[0019] Preferably, the step S20 further comprises the steps of:

[0020] S21: adjusting the height of the horizontal ruler disposed between the water tank and the syringe so as to keep it flush with the liquid surface in the water tank;

[0021] S22: Adjust the height of the syringe so that the axial midpoint of the syringe barrel is flush with the horizontal ruler.

[0022] Preferably, before step S21, step S23 is further included: detecting the liquid level in the water tank by a liquid level sensor and transmitting the data to a controller;

[0023] In the step S21, the controller controls the lifting and lowering of the platform for installing the level ruler according to the monitored data to adjust the height of the level ruler.

[0024] Preferably, the step S20 further comprises the steps of:

[0025] S21: adjusting the height of a horizontal ruler disposed between the water tank and the syringe so as to keep it flush with the axial midpoint of the syringe barrel;

[0026] S22: Adjust the height of the water tank so that the liquid level in the water tank is flush with the horizontal ruler.

[0027] Preferably, the temperature of the liquid in the water tank is 23°C±2°C; and / or; in the step S50, the moving rate of the core rod is 100mm / min±5mm / min; and / or; in the step S10, one end of the connecting tube located in the water tank is connected to a needle, and the head of the needle is vertically arranged downward in the water tank; and / or; in the step S10, one end of the connecting tube located in the water tank is freely placed in the water tank; and / or; in the step S10, a cover body is provided at the upper end of the water tank, and a through hole is provided in the middle area of ​​the cover body for the connecting tube to pass through, and one end of the connecting tube located in the water tank is connected to a needle, and the head of the needle is vertically arranged downward in the water tank.

[0028] The device and method for testing the sliding performance of a syringe provided by the present invention can bring at least one of the following beneficial effects:

[0029] 1. When testing in the syringe sliding performance testing device of the present invention, the syringe is in an upright state, that is, the core rod in the syringe is on top and the syringe barrel is on the bottom. When discharging the liquid in the syringe barrel of the syringe, the core rod is pushed from top to bottom, and the movement of the core rod is not subject to the resistance generated by the deadweight of the liquid in the syringe, thereby making the test result more accurate.

[0030] 2. In the present invention, the cone head of the syringe is connected to the water tank through a connecting tube, and a needle is provided at one end of the connecting tube located in the water tank, and the needle is freely placed in the water tank. Arranging the needle at the end of the connecting tube can make the test conditions closer to clinical application conditions, and the needle is freely placed in the water tank or the second end of the connecting tube is freely placed in the water tank. Compared with the fixed installation form, the free setting method can avoid the resistance generated by the fixed structure affecting the sliding performance detection parameters, thereby making the detection structure more accurate.

[0031] 3. In the present invention, the needle at the end of the connecting tube is placed vertically in the water tank to avoid the water in the water tank causing resistance to the drainage of the needle, thereby making the detection structure more accurate.

[0032] 4. In the present invention, a horizontal ruler is provided to keep the liquid level in the water tank consistent with the middle of the syringe. This arrangement can effectively prevent the gravity of the water in the syringe from affecting the test structure, thereby making the test more accurate.

[0033] 5. In the present invention, the height of the water tank, the level ruler and / or the clamp mechanism for installing the syringe is adjustable. When arranged in this way, different detection conditions can be set as needed during the detection process to make the detection accuracy higher. The height of each mechanism can also be adjusted according to syringes of different specifications, so that the application range of the test device is wider.

[0034] 6. In the sliding performance test method of the present invention, the syringe is placed upright. This arrangement can avoid the influence of the gravity of the water in the syringe when pushing and pulling the core rod, making the test result more accurate. Before the test, the liquid level in the water tank is made flush with the axial midpoint of the syringe, which can make the test result more accurate. Before conducting a formal test, the core rod in the syringe is pushed and pulled once to expel the air in the syringe and avoid the air in the syringe locking the core rod, thereby making the test result more accurate.

[0035] 7. In the sliding performance testing method of the present invention, the liquid level in the water tank is tested by a sensor, and the height of the horizontal scale is adjusted by a controller. This setting can improve the adjustment accuracy and efficiency of the scale.

[0036] 8. In the sliding performance test method of the present invention, the test result can be made more accurate by freely setting one end of the connecting tube located in the water tank. Setting a needle at the end of the connecting tube located in the water tank can make the test conditions closer to clinical trial conditions, further improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0038] Figure 1 It is a structural schematic diagram of a specific embodiment of the syringe sliding performance testing device of the present invention.

[0039] Description of Figure Numbers:

[0040] Bracket 1, first clamp mechanism 11, bottom plate 12, top plate 13, column 14, nut 15;

[0041] Adjusting frame 2, second clamping mechanism 21;

[0042] Syringe 31, core rod 32;

[0043] Water tank 4, adjustable base 41, support plate 42, liquid level sensor 43;

[0044] Connecting tube 51, needle 52;

[0045] Horizontal scale 6, vertical adjustment mechanism 61. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In order to make the drawings concise, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. Specific embodiment 1

[0048] This specific embodiment discloses a more preferred embodiment of a syringe sliding performance testing device, such as Figure 1 As shown, it includes a bracket 1 and an adjustment frame 2, the bracket 1 is provided with a first clamp mechanism 11 for mounting the syringe barrel 31 of the syringe, the adjustment frame 2 is located above the bracket 1, the adjustment frame 2 is provided with a second clamp mechanism 21 for mounting the core rod 32 of the syringe, and the spacing between the adjustment frame 2 and the bracket 1 is adjustable. The syringe sliding performance test device also includes a water tank 4, the water tank 4 is located on one side of the bracket 1, the syringe is connected to the water tank 4 through a connecting pipe 51, the first end of the connecting pipe 51 is connected to the cone head of the syringe, and the second end is connected to the water tank 4. When performing a specific test, the core rod 32 can be moved by pressing the adjustment frame 2 downward to gradually discharge the liquid in the syringe. In this process, since the syringe is upright (that is, the syringe barrel 31 is at the bottom and the core rod 32 is at the top), the sliding force of the core rod 32 when it is pressed down will not be affected by the deadweight of the liquid in the syringe barrel 31, thereby effectively ensuring the accuracy of the test results.

[0049] In this embodiment, a cover body (not shown) is provided at the upper end of the water tank 4, and a through hole for the connecting tube 51 to pass through is provided in the middle area of ​​the cover body. The through hole is provided in the middle area to prevent the connecting tube 51 from hitting the side wall of the water tank so that the liquid in the connecting tube 51 cannot flow smoothly into the water tank 4, and further prevent the poor water flow in the connecting tube from affecting the test results. The second end of the connecting tube 51 extends into the water tank 4 through the through hole on the cover body, and a needle 52 is provided at the second end of the connecting tube 51, and the head of the needle 52 is vertically facing downward. The second end of the connecting tube 51 is in a non-fixed state in the water tank 4. Such a setting can prevent the fixing force applied to the second end of the connecting tube 51 from affecting the accuracy of the test results. By providing the needle 52 at the second end of the connecting tube 51, the test conditions can be closer to the clinical trial conditions, so that the test results are more accurate. In addition, placing the needle 52 vertically can also prevent the water in the syringe from being discharged into the water tank 4 through the needle 52 without external resistance, thereby further improving the accuracy of the test results.

[0050] In addition, the water tank 4 is specifically arranged on an adjustable base 41, and a support plate 42 is arranged at the output end of the adjustable base 41, and the water tank 4 is arranged on the support plate 42. When the model of the syringe changes, the height of the water tank 4 can be adjusted by the adjustable base 41, so that the liquid level of the water tank 4 is kept flush with the axial midpoint of the syringe 31. This arrangement can make the test result more accurate, and can also make the test device applicable to various models of syringes. The adjustable base here can be an electric push rod, a hydraulic push rod or other manual adjustment mechanism.

[0051] In this embodiment, the syringe sliding performance test device also includes a horizontal ruler 6 disposed between the syringe barrel 31 and the water tank 4. The horizontal ruler 6 is horizontally disposed on the output end of a vertical adjustment mechanism 61. The vertical adjustment mechanism 61 is used to adjust the height of the horizontal ruler 6. The horizontal ruler 6 can ensure that the liquid level in the water tank 4 is flush with the axial midpoint of the syringe barrel 31, so that the test result is more accurate. The vertical adjustment mechanism 61 here can be an electric push rod, a hydraulic push rod, etc. In addition, the vertical adjustment mechanism 61 is disposed on the support plate 42 on the adjustable base 41, that is, the adjustable base 41 can adjust the height of the water tank 4, the vertical adjustment mechanism 61 and the horizontal ruler 6 on the support plate 42 by adjusting the height of the support plate 42.

[0052] In this embodiment, a liquid level sensor 43 is provided in the water tank 4, and the liquid level sensor 43 is connected to a controller (not shown in the figure) for communication, and the controller is also connected to the vertical adjustment mechanism 61 for communication, and the controller controls the vertical adjustment mechanism 61 to adjust the height of the horizontal ruler 6 through the liquid level data obtained by the liquid level sensor 43, so as to ensure that the horizontal ruler 6 is kept flush with the liquid level in the water tank 4. This adjustment method can improve the detection efficiency and detection accuracy.

[0053] In this embodiment, the bracket 1 includes a bottom plate 12, a top plate 13 and four columns 14, the four columns 14 are arranged between the bottom plate 12 and the top plate 13, the first end of the column 14 is fixed on the bottom plate 12, and the second end thereof is provided with an external thread, the top plate 13 is penetrated at the second end of the column 14, and a pair of nuts 15 are respectively threadedly connected at the second ends of a pair of columns 14, and the pair of nuts 15 are located on both sides of the top plate 13 and clamp the top plate 13, so as to fix the top plate 13 at the second ends of the columns 14. This bracket structure is convenient for adaptively adjusting the height of the top plate 13 according to the size specifications of the syringe. When the height of the syringe needs to be adjusted, it is only necessary to rotate the nut 15 on the column 14, and by adjusting the position of the nut 15 on the column 14, the height of the top plate 13 can be adjusted, and the overall height of the syringe fixed on the top plate can be further adjusted. This bracket structure is simple, and the adjustment method is simple and easy to operate.

[0054] In this embodiment, the first clamping mechanism 11 for fixing the syringe 31 and the second clamping mechanism 21 for fixing the core rod 32 have similar structures, and both can be selected from conventional clamping mechanisms. Taking the first clamping mechanism as an example, it includes a pair of relatively arranged L-shaped clamping plates, the L-shaped clamping plates are provided with sliding grooves, and bolts are provided in the sliding grooves. The syringe is fixed or removed by adjusting the position of the bolts in the sliding grooves.

[0055] The steps of the syringe sliding performance testing device in this specific embodiment when performing a specific test are as follows:

[0056] S10: Install the syringe, the connecting tube 51 and the water tank 4, and fill the water tank 4 with an appropriate amount of water at a temperature of 23°C ± 2°C;

[0057] S20: adjusting the relative positions of the water tank 4 and the syringe so that the liquid level in the water tank 4 and the axial midpoint of the syringe barrel 31 are located on the same plane, and determining whether the liquid level in the water tank 4 and the axial midpoint of the syringe barrel 31 are located on the same plane by means of the horizontal ruler 6. In this step, the height of the water tank 4 can be adjusted as needed while the syringe remains stationary, or the height of the syringe can be adjusted while the water tank 4 remains stationary, or the height of the water tank 4 and the syringe can be adjusted simultaneously;

[0058] S30: reducing the height of the adjustment frame 2, driving the core rod 32 of the syringe to be pressed down by the adjustment frame 2, so that the reference line of the core rod 32 gradually moves to the zero scale line of the syringe barrel 31 of the syringe, exhausting the air in the syringe barrel 31, and setting the force value recorder to zero;

[0059] S40: increasing the height of the adjustment frame 2, and pulling the core rod 32 of the syringe upward through the adjustment frame 2 until the reference line of the core rod 32 gradually moves to the nominal scale capacity line on the syringe barrel 31, and the force value recorder is reset to zero again;

[0060] S50: After waiting for a preset time of 30s±5s, the core rod 32 is pressed down to move the reference line of the core rod 32 to the zero scale line of the syringe 31. During this process, the moving speed of the core rod 32 is 100mm / min±Smm / min;

[0061] S60: Read the data on the force recorder, and calculate the sliding performance of the syringe according to the data recorded by the force recorder.

[0062] In the above steps, the force recorder may be a conventional force sensor, and in step S60, the corresponding relationship between the parameters recorded by the force recorder and the sliding performance of the syringe may also be determined by a conventional algorithm.

[0063] Of course, in other specific embodiments of the syringe sliding performance testing device of the present invention, the second end of the connecting tube can be directly fixedly connected to the water sink; the needle at the end of the connecting tube can be selectively set; the cover body on the water sink can also be not set, but other structures can be used to keep the second end of the connecting tube in a vertical position. Of course, the second end of the connecting tube can also be placed completely freely in the water sink; the adjustable base under the water sink can be set as a manual adjustment mechanism or not; the vertical adjustment mechanism under the horizontal ruler can be equipped with a manual adjustment mechanism or not; the liquid level height sensor in the water sink can also be not set; the specific structure of the bracket and the specific structure of the clamp mechanism can be adjusted according to actual needs, which will not be repeated here. Specific embodiment 2

[0065] This specific embodiment discloses a method for testing the sliding performance of a syringe, comprising the steps of:

[0066] S10: vertically arranging the syringe with the core rod of the syringe facing upward, installing the syringe barrel through the first clamping machine, installing the core rod of the syringe through the second clamping mechanism, and connecting the cone head of the syringe to a water tank through a connecting pipe;

[0067] S20: adjusting the relative positions of the water tank and the syringe so that the liquid level in the water tank and the axial midpoint of the syringe barrel are located on the same plane;

[0068] S30: Press down the core rod of the syringe to move the reference line of the core rod to the zero scale line of the syringe barrel, exhaust the air in the syringe barrel, and set the force value recorder to zero;

[0069] S40: Pull the core rod of the syringe upward until the reference line of the core rod moves to the nominal scale capacity line on the syringe, and reset the force value recorder to zero again;

[0070] S50: After waiting for a preset time, the core rod is pressed down to move its reference line to the zero scale line of the syringe. During this process, the moving speed of the core rod is 100 mm / min±5 mm / min;

[0071] S60: Reading the data on the force recorder, and calculating the sliding performance of the syringe according to the data recorded by the force recorder.

[0072] Specifically, step S20 includes the following steps:

[0073] S21: Detecting the liquid level in the water tank through a liquid level sensor and transmitting the data to the controller;

[0074] S22: The controller controls the lifting and lowering of a platform provided with a horizontal ruler according to the data monitored by the controller. During the lifting and lowering of the platform, the height of the horizontal ruler is adjusted so that the horizontal ruler is flush with the liquid surface in the water tank. The horizontal ruler is located between the water tank and the syringe barrel.

[0075] S23: Adjust the height of the syringe so that the axial midpoint of the syringe barrel is flush with the horizontal ruler.

[0076] In this specific embodiment, the temperature of the liquid in the water tank is 23°C±2°C. This setting can make the experimental conditions closer to clinical experimental conditions.

[0077] In step S10, a cover is provided at the upper end of the water tank, a through hole for a connecting pipe to pass through is provided in the middle area of ​​the cover, one end of the connecting pipe located in the water tank is connected to a needle, and the head of the needle is vertically arranged downward in the water tank.

[0078] The test conditions of the syringe sliding performance test method disclosed in this specific embodiment are closer to clinical experimental conditions, so that the test results are more accurate and the test precision is higher.

[0079] It should be particularly noted that the syringe sliding performance testing method disclosed in this specific embodiment can be tested using the syringe sliding performance testing device disclosed in specific embodiment one, and the syringe sliding performance testing device disclosed in specific embodiment one can also be tested using the syringe sliding performance testing method disclosed in this embodiment.

[0080] Of course, in other specific embodiments of the syringe sliding performance testing method of the present invention, the method of adjusting the horizontal ruler can be adjusted by manual adjustment or other automatic control methods; the water temperature in the water tank and the moving rate of the core rod can be increased or decreased within a certain range as needed; the end of the connecting tube connected to the water tank can be directly fixed to the bottom of the water tank, or fixed in the water tank by other forms of fixed structures, and the needle at the end of the connecting tube can be not set; in addition, the specific steps of step S20 can be adjusted as follows: S21: adjust the height of the horizontal ruler so that it is flush with the axial midpoint of the syringe barrel; S22: adjust the height of the water tank so that the liquid level in the water tank is flush with the horizontal ruler; of course, the specific implementation steps of step S20 can also be adjusted according to actual needs.

[0081] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A method for testing the sliding performance of a syringe, characterized in that: Includes steps: S10: vertically arranging the syringe with the core rod of the syringe facing upward, installing the syringe barrel through a first clamping machine, installing the core rod of the syringe through a second clamping machine, and connecting the cone head of the syringe to a water tank through a connecting pipe; S20: adjusting the relative positions of the water tank and the syringe so that the liquid level in the water tank and the axial midpoint of the syringe barrel of the syringe are located on the same plane; S30: Press down the core rod of the syringe to move the reference line of the core rod to the zero scale line of the syringe barrel, exhaust the air in the syringe barrel, and set the force value recorder to zero; S40: Pull the core rod of the syringe upward until the reference line of the core rod moves to the nominal scale capacity line on the syringe, and reset the force value recorder to zero again; S50: After waiting for a preset time, the core rod is pressed down to move its reference line to the zero scale line of the syringe; S60: reading the data on the force recorder, and calculating the sliding performance of the syringe according to the data recorded by the force recorder.

2. The method for testing the sliding performance of a syringe according to claim 1, characterized in that: The step S20 further comprises the steps of: S21: adjusting the height of the horizontal ruler disposed between the water tank and the syringe so as to keep it flush with the liquid surface in the water tank; S22: adjusting the height of the syringe so that the axial midpoint of the syringe barrel is flush with the horizontal ruler; or; The step S20 further comprises the steps of: S21: adjusting the height of a horizontal ruler disposed between the water tank and the syringe so as to keep it flush with the axial midpoint of the syringe barrel; S22: Adjust the height of the water tank so that the liquid level in the water tank is flush with the horizontal ruler.

3. The method for testing the sliding performance of a syringe according to claim 2, characterized in that: Before step S21, the method further includes step S23: detecting the liquid level in the water tank by a liquid level sensor and transmitting the data to a controller; In the step S21, the controller controls the lifting and lowering of the platform for installing the level ruler according to the monitored data to adjust the height of the level ruler.

4. The method for testing the sliding performance of a syringe according to claim 1, characterized in that: The temperature of the liquid in the water tank is 23°C ± 2°C; and / or; In the step S50, the moving speed of the core rod is 100 mm / min±5 mm / min; and / or; In the step S10, one end of the connecting pipe located in the water tank is freely placed in the water tank; and / or; In the step S10, one end of the connecting pipe located in the water tank is connected to a needle, and the head of the needle is vertically arranged downward in the water tank; and / or; In step S10, a cover is provided at the upper end of the water tank, a through hole for the connecting pipe to pass through is provided in the middle area of ​​the cover, one end of the connecting pipe located in the water tank is connected to a needle, and the head of the needle is vertically arranged downward in the water tank.

5. The method for testing the sliding performance of a syringe according to any one of claims 1 to 4, characterized in that: The syringe sliding performance testing device used in the syringe sliding performance testing method comprises: A bracket, wherein the bracket is provided with a first clamp mechanism for mounting a syringe barrel of the syringe; An adjustment frame is located above the bracket, the adjustment frame is provided with a second clamp mechanism for mounting the core rod of the syringe, and the distance between the adjustment frame and the bracket is adjustable; a water tank, located on one side of the bracket; A connecting tube, a first end of which is connected to the cone head of the syringe located on the bracket, and a second end of which is connected to the water tank.

6. The method for testing the sliding performance of a syringe according to claim 5, characterized in that: The second end of the connecting pipe is freely placed in the water tank. and / or; A needle is provided at the second end of the connecting pipe, and the head of the needle is vertically arranged downward in the water tank; and / or; A cover body is arranged at the upper end of the water tank, and a through hole for the connecting pipe to pass through is arranged in the middle area of ​​the cover body.

7. The method for testing the sliding performance of a syringe according to claim 5, characterized in that: The water tank is arranged on an adjustable base, and a support plate for mounting the water tank is arranged at the output end of the adjustable base; and / or; The syringe sliding performance testing device also includes a horizontal ruler, which is arranged between the syringe barrel and the water tank.

8. The method for testing the sliding performance of a syringe according to claim 5, characterized in that: The syringe sliding performance testing device also includes a horizontal ruler arranged between the syringe barrel and the water tank. The horizontal ruler is horizontally arranged on the output end of a vertical adjustment mechanism. The vertical adjustment mechanism is used to adjust the height of the horizontal ruler.

9. The method for testing the sliding performance of a syringe according to claim 8, characterized in that: A liquid level sensor is provided in the water tank, and the liquid level sensor is communicatively connected to a controller, and the controller is also communicatively connected to the vertical adjustment mechanism. The controller controls the vertical adjustment mechanism to adjust the height of the horizontal scale through the liquid level data obtained by the liquid level sensor.

10. The method for testing the sliding performance of a syringe according to claim 5, characterized in that: The bracket includes a bottom plate, a top plate and a plurality of columns, the first end of each column is fixed to the bottom plate, the second end of each column is provided with an external thread, the top plate is passed through the second end of the column, and a pair of nuts are respectively threadedly connected at the second ends of a pair of columns, and the pair of nuts are located on both sides of the top plate to fix the top plate to the second end of the column.

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