CN221803303U - Keep somewhere needle extension tube gas tightness detection device - Google Patents

Abstract

The utility model discloses an air tightness detection device for an extension tube of an indwelling needle, and belongs to the field of medical device detection. The utility model is mainly designed for the extension hose part of the indwelling needle. One end for air tightness detection is connected to a connector with a buffer protection function, and the other end is immersed in a material tank filled with silicone oil under the control of a siliconization component. Subsequently, the silicone oil is first drawn into the interior of the extension tube and then blown out through the suction and blowing of an isolation pump, so that a layer of silicone oil is hung on the inner wall of the extension tube. After the siliconization of the inner wall is completed, the flow meter is started and high-pressure gas is introduced to detect the air flow of the extension tube within a certain period of time, and the air tightness of the extension tube is judged based on the data to determine whether it meets the standard or is blocked. The utility model realizes the integration of the air tightness detection of the extension tube and the siliconization of the inner wall into one process, which can save a lot of time for the production of indwelling needles and greatly improve production efficiency.

Description

An air tightness detection device for an indwelling needle extension tube

Technical Field

The utility model belongs to the field of medical equipment detection, and in particular relates to an air tightness detection device for an extension tube of an indwelling needle.

Background Art

An indwelling needle (indwelling catheter) is a medical device used for long-term venous access. The main function of an indwelling needle is to provide the human body with a reliable and long-term meridian access, making it convenient for medical staff to perform long-term infusion, blood transfusion, nutritional support and other treatment operations on patients, avoiding repeated tendon and vein punctures due to frequent intravenous infusion in a short period of time, and reducing unnecessary pain and inconvenience for patients.

The structure of an indwelling needle can be roughly divided into three parts: the needle tube, the extension tube and the connector. The needle tube is a double-layer needle tube unique to indwelling needles, consisting of a steel inner core needle tube and an outer soft needle tube. The rear of the needle tube is connected to the connector part through an extension tube, and the connector part is used to connect to other components such as the drip bottle for medication.

For the extension tube of the indwelling needle, air tightness testing is very important. If the extension tube of the indwelling needle leaks or is blocked during use, it will cause leakage and liquid blockage during intravenous infusion. Therefore, in the production process of the indwelling needle, it is very important to perform air tightness testing on the extension tube part, and selecting unqualified products before assembling the various parts of the indwelling needle can greatly improve the yield rate of the final indwelling needle.

In the prior art, in order to further prevent thrombosis from forming in the indwelling needle due to the backflow of blood from the user, some manufacturers will siliconize the inner wall of the extension tube during production, which can effectively reduce the formation of thrombosis in the extension tube.

However, there is no better solution for siliconizing the inner wall of the extension tube on the market, and usually an additional process is required to siliconize the inner wall of the extension tube.

Therefore, a new design is needed that can perform air tightness testing on the extension tube and siliconize the inner wall at the same time.

Utility Model Content

In view of the above problems existing in the prior art, the purpose of the utility model is to provide an air tightness detection device for an extension tube of an indwelling needle.

In order to solve the above problems, the technical solution adopted by the utility model is as follows:

An air tightness detection device for an extension tube of an indwelling needle comprises an air tightness detection component, a clamping component and a siliconized component, wherein the air tightness detection component comprises an air pump, a flow meter, an air valve and an extension tube connector, wherein the air pump, the flow meter, the air valve and the extension tube connector are connected in sequence via an air supply pipe, a clamping component is arranged on the opposite side of the connector, the siliconized component is arranged on the other side of the clamping component, and the siliconized component comprises a pipeline bending plate and a material trough.

The air pump is a diaphragm pump.

The extension tube connector comprises a base, an inner tube and an outer tube, wherein the inner tube is fixedly arranged on the base, the outer tube is arranged around the inner tube, the outer tube is connected to the base via a spring, and the inner tube is longer than the outer tube.

The connector is arranged on the air tightness detection component through a push rod, and the base can be moved forward and backward through the push rod.

The pipe bending plate and the material trough can both move up and down.

The clamping component comprises an upper clamping plate and a lower clamping plate, and both the upper clamping plate and the lower clamping plate can move up and down.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model is mainly designed for the extension hose part of the indwelling needle. The extension tube is sent into the clamping component and clamped by the upper and lower clamping plates. Then the connector moves toward the open end of the extension tube under the drive of the push rod. Finally, the inner tube of the connector enters the extension tube. In order to prevent the connector from going too deep into the extension tube, an outer tube is further arranged on the outer side of the inner tube to protect the tube mouth of the extension tube from being damaged.

The other end of the extension tube is pressed into a material tank filled with silicone oil by the action of the pipe bending plate. The silicone oil is first drawn into the interior of the extension tube and then blown out by the suction and blowing of the isolation pump, so that a layer of silicone oil is hung on the inner wall of the extension tube. After the inner wall siliconization is completed, the flow meter is started and high-pressure gas is introduced to detect the air flow of the extension tube within a certain period of time. Based on the data, it is determined whether the air tightness of the extension tube meets the standard or is blocked. The utility model realizes the integration of the air tightness detection of the extension tube and the inner wall siliconization into one process, which can save a lot of time for the production of indwelling needles and greatly improve the production efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic structural diagram of a connector;

In the figure: 1. air pump; 2. flow meter; 3. air valve; 4. push rod; 5. connector; 6. base; 7. inner tube; 8. outer tube; 9. pipe bending plate; 10. material trough.

DETAILED DESCRIPTION

The utility model is further described below in conjunction with specific embodiments.

As shown in FIG1 , the utility model mainly includes an airtightness detection component, a clamping component and a siliconized component.

The air tightness detection component mainly includes an air pump 1, a flow meter 2, an air valve 3 and a connector 5, wherein the air pump 1, the flow meter 2, the air valve 3 are directly installed on the base of the air tightness detection component, and the connector 5 is installed on the base of the detection component through a push rod 4, so the connector 5 can move in the push rod direction under the push of the push rod 4.

As shown in FIG2 , the connector 5 includes a base 6, an inner tube 7 and an outer tube 8, wherein the inner tube 7 is fixedly arranged on the base 6, and the inner tube 7 is connected to the air valve 3, and the gas sent from the air pump 1 can be ejected from the inner tube 7. The outer tube 8 is a hollow sleeve, and its inner diameter is slightly larger than the outer diameter of the inner tube 7, and the outer tube 8 can move along the direction of the inner tube 7. The outer tube 8 is connected to the base 6 by a spring, and the inner tube 7 after connection is longer than the outer tube 8. Under normal working conditions, the inner tube 7 goes deep into the extension tube, and the outer tube 8 firmly supports the tube mouth of the extension tube, and cooperates with a layer of rubber layer on the surface of the outer tube 8 to ensure that the extension tube will not leak at the end of the inner tube 7 and affect the detection effect.

In addition to ensuring airtightness, the structure of the outer tube 8 can also provide a certain amount of buffer for the connection between the connector 5 and the extension tube. In order to fully insert the inner tube 7 into the extension tube, the pushing distance of the push rod 4 must be greater than the distance that the inner tube 7 extends relative to the outer tube 8, that is, when the inner tube 7 is pushed into the extension tube, the end of the extension tube will contact the outer tube 8 and continue to move forward a small part in the direction of the base 6. If the outer tube 8 is also fixedly connected to the base 6, the end of the extension tube will be deformed due to excessive extrusion, which may cause damage to the extension tube mouth. The outer tube 8 connected by the spring can retreat with the extension tube mouth toward the base 6. At this time, the spring will provide the outer tube 8 with a thrust to seal the extension tube mouth, and the compression distance of the spring is the buffer margin provided by the outer tube 8 for the extension tube.

The clamping component is arranged at the rear of the connecting head 5, and the clamping component mainly includes two upper and lower clamping plates, and the upper clamping plate and the lower clamping plate can move up and down. When the upper and lower clamping plates reach the specified position to clamp the extension tube, the position of the extension tube mouth is just opposite to the connecting head 5, and after it is fixed, the connecting head 5 can extend the inner tube 7 into the extension tube.

On the other side of the clamping component is the siliconized component, which mainly includes two parts: a pipe bending plate 9 and a material trough 10. The pipe bending plate 9 and the material trough 10 can also move freely up and down. After the clamping component clamps the extension tube, the pipe bending plate 9 is pressed down and the material trough 10 rises at the same time, pressing the other end of the extension tube into the material trough 10 so that the tube mouth is completely immersed in the silicone oil in the material trough 10.

In actual use, the clamp for transporting the extension tube reaches between the clamping component and the siliconized component, at which time one end of the extension tube is located in the middle of the clamping plate of the clamping component, and the other end is located above the material tank 10. Then the clamping plate moves to clamp the extension tube and align the tube opening at one end with the connector 5, and then the push rod 4 is activated to push the inner tube 7 of the connector 5 into the tube opening of the extension tube. The other end of the extension tube is immersed in the synchronously rising material tank 10 under the action of the pipe bending plate 9, and the tube opening is completely immersed in silicone oil.

At this time, start the air pump 1 and control it to inhale. At this time, the silicone oil in the material tank 10 will be drawn into the extension tube. When the extension tube is completely filled with silicone oil, control the air pump 1 to blow air to discharge the silicone oil from the extension tube. At this time, a layer of silicone oil has been hung on the inner wall of the extension tube, and the siliconization of the inner wall has been completed.

After the silicone oil in the extension tube is discharged, the pipe bending plate 9 rises, the material tank 10 drops, and the extension tube returns to a normal state. At this time, the air pump 1 is started again and the flow meter 2 is turned on to start testing the air tightness of the extension tube. In order to facilitate fine adjustment of the output of the air pump 1, the air pump 1 in this embodiment adopts a diaphragm pump, which can better regulate the flow rate of the incoming gas and can also adapt to the extraction and release of silicone oil.

After the test is completed, the clamping plate of the clamping component is loosened and returned to its original position. At this time, the clamp holding the extension tube moves slightly forward and backward to tear the connector 5 off the tube mouth of the extension tube. The clamp that has completed the test is then sent away. At the same time, the next batch of clamps brings the extension tubes that need to be tested to between the clamping component and the siliconized component to start the next batch of testing.

Claims (6)

1. An air tightness detection device for an extension tube of an indwelling needle, characterized in that it comprises an air tightness detection component, a clamping component and a siliconized component, the air tightness detection component comprises an air pump, a flow meter, an air valve and an extension tube connector, the air pump, flow meter, air valve and extension tube connector are connected in sequence through an air supply pipe, a clamping component is arranged on the opposite side of the connector, the siliconized component is arranged on the other side of the clamping component, and the siliconized component comprises a pipe bending plate and a material trough. 2. An air tightness detection device for an indwelling needle extension tube according to claim 1, characterized in that the air pump is a diaphragm pump. 3. An air tightness detection device for an indwelling needle extension tube according to claim 1, characterized in that the extension tube connector includes a base, an inner tube and an outer tube, the inner tube is fixedly arranged on the base, the outer tube is arranged around the inner tube, the outer tube is connected to the base through a spring, and the length of the inner tube is longer than that of the outer tube. 4. An air tightness detection device for an indwelling needle extension tube according to claim 3, characterized in that the connecting head is arranged on the air tightness detection component through a push rod, and the base can be moved forward and backward by the push rod. 5. An air tightness detection device for an indwelling needle extension tube according to claim 1, characterized in that the pipe bending plate and the material trough can both move up and down. 6. An air tightness detection device for an indwelling needle extension tube according to claim 1, characterized in that the clamping component includes an upper clamping plate and a lower clamping plate, and the upper clamping plate and the lower clamping plate can both move up and down.