CN102636322A - Gas tightness/air permeability automatic detecting device for infusion apparatus and detecting method utilizing same - Google Patents

Abstract

The invention relates to an automatic detection device for air tightness/ventilation of an infusion set and a control method thereof, which comprises an air source and an air intake pipeline connected with the air source, an air source cleaning processor and an air source cleaner are arranged on the air intake pipeline A pressure regulator, a pressure and a flow discriminator are provided in sequence on the rear air intake pipeline, and an interface for connecting the input end of the infusion set is provided at the end of the air intake pipeline, and a position sensor is arranged next to the interface, and the position sensor The signal output end is connected with a controller, and the controller is respectively connected with the pressure and flow discriminator and the warning device through the signal circuit. It realizes an automatic detection device and detection method of the air tightness/permeability of an infusion set with high degree of automation, convenient detection and system self-test function.

Description

An automatic air tightness/ventilation detection device and detection method for an infusion set

technical field

The invention relates to a detection device, in particular to a detection device for an infusion set.

Background technique

The full name of sterile devices is disposable sterile medical devices, which refer to medical devices that are sterile, non-pyrogenic, qualified after inspection, and can be used directly for one-time use within the validity period. Disposable infusion sets are sterile instruments. the

The automation equipment industry of sterile medical devices has developed vigorously in recent years, but the degree of automation of sterile medical device companies is still very low at this stage, and there is still a lot of room for improvement in the degree of automation. For example, the production and assembly process of disposable infusion sets is basically still a manual operation. The main reason is that the new products to be assembled are flexible plastic parts, which are more difficult to realize automatic assembly than conventional products. So far, no single-use infusion has been realized. Fully automatic assembly of the device. However, the general trend of market development is that the medical device industry generally urgently needs technological innovation, transformation and upgrading to change the labor-intensive status quo, that is, the development of full-process automatic assembly technology is imperative, so the design and development of automatic detection technology and devices for disposable infusion , is very important in promoting the implementation of its automatic assembly technology. The airtightness and ventilation of disposable infusion sets are mandatory performances. However, in the current production of enterprises, this performance is still mainly detected manually, which is difficult to meet the requirements of automated production. For example, the Chinese patent with publication number CN201795901U discloses an air leak detector for infusion sets, which can be effectively used to solve the problem of convenient and rapid detection of air leakage in infusion sets. Its technical scheme is: including a glass tube, a needle tube and an air valve, the needle tube is placed in the glass tube, the upper part of the water layer in the glass tube is an air layer, the upper opening of the needle tube is placed in the air layer, one end of the lower part of the glass tube is connected to an air source, and the other end is passed through The guide pipe is connected to the bottom of the air valve. The structure of the air valve is that the upper part of the valve body is equipped with a valve cover through the connecting body, and the lower part of the valve cover is equipped with a valve core in the valve body. The lower end of the valve core is equipped with a spring installed in the valve body, and the lower part of the valve body is connected with the guide pipe by the connecting body. When in use, put the tested piece into the upper port of the valve cover, press down the tested piece, its gas port is connected with the valve core, the gas flows from the bottom through the side hole of the valve core to the gas port, and seals the valve cover outlet at the same time, if the component leaks Then the upper end of the glass tube and the air source form a pressure difference. Since the upper port of the needle tube is in the air, the gas enters the upper part of the tube in the form of bubbling. At this time, it is convenient to check the air leakage: if the component does not leak, the upper and lower pressure difference is zero. , the water surface is in a static state; after the same leak detection is completed, due to the action of the spring, the valve core moves up, the sealing ring seals the side hole of the valve core and the entire inner wall gas path, the system has no pressure difference, and the water surface is also in a static state. However, this technical solution allows the operator to observe the bubbling with the naked eye, and whether there is a problem with the device itself is not easy to be observed. Therefore, using this device for detection is not reliable, and the degree of automation is not high, and the detection process will take more time. long.

Contents of the invention

The present invention mainly solves the technical problems existing in the prior art such as unreliable detection, low degree of automation, and long time-consuming detection process, and provides a kind of infusion device with high degree of automation, convenient detection, and system self-inspection function. Tightness/air permeability automatic detection device and detection method thereof.

The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: an automatic detection device for air tightness/ventilation of an infusion set, which is characterized in that it includes an air source and an air intake pipeline connected to the air source , there is an air source cleaning processor on the air intake pipeline, a pressure regulator, a pressure and flow discriminator are arranged on the air intake pipeline behind the air source cleaner, and a pressure regulator, a pressure and flow discriminator are arranged at the end of the air intake pipeline, which is used to connect the input end of the infusion set A position sensor is arranged next to the interface, the signal output end of the position sensor is connected with a controller, and the controller is respectively connected with the pressure and flow discriminator and the warning device through the signal circuit. When using the device to detect the infusion set, the inlet end of the infusion set is inserted into the interface, and the position sensor can obtain a signal at this time, and the controller knows that the infusion set is installed in place through the signal, and then performs detection. The inlet end of the infusion set is larger and the outlet end is smaller. Therefore, it can be considered that the condition of the outlet end of the infusion set has a direct impact on the airflow achieved during detection. At constant air pressure, when the outlet port is blocked, the detected airflow decreases; when there is a leak at the outlet port and anywhere before the outlet port, the detected airflow increases. However, when the device itself has the problem of inaccurate air pressure, this detection will also be inaccurate, so the present invention also provides a pre-detection structure for the device, that is, after the gas source cleaner processes the high-pressure gas, it is adjusted by the pressure regulator. to the allowable pressure of the infusion set, and judge whether the pressure is suitable by the pressure and flow judgment device. If it is not suitable, the system will display a warning message, and the operator can immediately repair the device, and there will be no improper detection of the tested part. . the

Preferably, the interface is provided with a pressure valve, the leading end of the pressure valve is connected with the air inlet pipeline, and the air outlet end is provided with a sealed connection nozzle for connecting the measured piece. The pressure valve is opened when the air pressure reaches the appropriate value for detection. When the air source is closed or the air pressure is reduced to a certain value, the pressure valve is closed so that the outside gas will not flow back into the device, so the device is equipped with this pressure. After the valve, it will not be polluted by the outside air, nor will it cause pollution to the tested part due to the detection.

As a preference, an air leakage detection chamber is provided on the outside of the sealing connection nozzle, a sealing socket coaxial with the sealing connection nozzle is provided on the air leakage detection chamber, and an air outlet pipe is provided in the air leakage detection chamber , the air outlet pipe is provided with an airflow detector, and the signal circuit of the airflow detector is connected with the controller. After the sealing connection nozzle is connected to the tested part for many times, there will be problems of poor sealing and air leakage, which will affect the accuracy of the test. In this scheme, the inlet end of the tested part passes through the sealed socket first, and then connects with the sealed connection nozzle. , the gas flows out, and all or most of it flows out from the outlet pipe. When the airflow detector detects airflow, it means that there is air leakage between the sealed connection nozzle and the tested part, that is, a signal is found to the controller, and the controller passes a warning. The device prompts the operator to stop the detection.

Preferably, the controller is provided with a counting unit, and the controller is connected with an electronic display. Every time the position sensor sends a signal to the controller that the measured piece is in place, the counter will count up by 1 and display it on the electronic display, so that the operator can know the number of pieces measured.

Preferably, the position sensor is a photoelectric switch. As a position sensor, the photoelectric switch has the advantages of convenient installation, sensitive induction, convenient use and no influence on the fixed DUT.

Preferably, the warning device includes a buzzer and/or an indicator light, and the indicator lights include a low flow indicator light and a high flow indicator light. When the gas flow rate is too low, the controller controls the low flow indicator light to be on, indicating that the test piece has a blockage problem; otherwise, the high flow indicator light is on, which means that the test piece has a gas leakage problem. When there is any fault or blockage or air leakage problem, the buzzer will sound, and it can emit sounds of different lengths and frequencies according to different problems.

Preferably, the warning device includes a buzzer and/or an indicator light, and the indicator lights include a low flow indicator light, a high flow indicator light, a seal leakage indicator light and a valve clogging indicator light. When the gas flow rate is too low, the controller controls the low flow indicator light to be on, indicating that the test piece has a blockage problem; otherwise, the high flow indicator light is on, which means that the test piece has a gas leakage problem. When there is any fault or blockage or air leakage problem, the buzzer will sound, and it can emit sounds of different lengths and frequencies according to different problems. If there is a problem with the seal between the sealing connection nozzle and the test piece, the gas flows out, and all or most of it flows out from the gas outlet pipe. If there is an air leak between the seals, it will send a signal to the controller, and the controller will warn the operator by controlling the seal leakage indicator to light up. If the pressure valve breaks down and cannot be opened, the flow measured by the system is zero, and when the position sensor obtains the connected parts in place, the flow is still zero, and the controller controls the valve blockage indicator to light up.

Above-mentioned device can finish the detection to infusion set by following method: it comprises the following steps:

Step 1. Turn on the air source and introduce high-pressure gas into the intake pipeline. When the pressure and flow discriminator judges that the air pressure is the preset value or not, the warning device will send out a prompt signal respectively;

Step 2. When the warning device prompts that the air pressure is the preset value, insert the needle at the input end of the infusion set into the interface;

Step 3. When the position sensor detects that the interface has been inserted into the needle of the input end of the infusion set, the position sensor sends a signal to the controller to control the pressure to be received after receiving the signal and the flow value Q issued by the flow discriminator. The signal is compared with the preset flow value Q ₀ when the infusion set is normal;

Step 4. When Q=Q ₀ , it is determined that the airtightness/ventilation of the infusion set is normal,

When Q﹤Q ₀ , it is determined that the ventilation of the infusion set is not good and there is a blockage problem.

When Q > Q ₀ , it is judged that the airtightness of the infusion set is not good, and there is an air leakage problem.

Preferably, in step 3, the system uses the airflow detector to determine whether there is gas flowing out of the air leakage detection chamber. The device detects a signal and the detection process stops.

The beneficial effect brought by the present invention is that it solves the technical problems existing in the prior art such as unreliable detection, low degree of automation, and long time-consuming detection process, and realizes a high degree of automation, convenient detection, and a system The invention discloses an automatic airtightness/ventilation detection device and a detection method of an infusion set with a self-testing function.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of embodiment 1;

Accompanying drawing 2 is a kind of structural representation of embodiment 2;

Accompanying drawing 3 is a kind of structure diagram of pressure valve part of the present invention.

Detailed ways

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in Figure 1 and Figure 3, an automatic air tightness/ventilation detection device for an infusion set is characterized in that it includes an air source and an air intake pipeline connected to the air source, and the air intake pipeline is provided with an air source Clean the processor, the air intake pipeline behind the air source cleaner is provided with a pressure regulator, pressure and flow discriminator in sequence, and the end of the intake pipeline is provided with an interface for connecting the input end of the infusion set, and a pressure regulator is provided on the interface. Valve, the leading end 1 of the pressure valve is connected to the air inlet pipeline, and the air outlet end is provided with a sealed connection nozzle 2 for connecting the tested piece. There is a photoelectric switch next to the interface, and an air leakage detection chamber 3 is provided on the outside of the sealing connection nozzle 2, and a sealing socket 6 coaxial with the sealing connection nozzle is provided on the air leakage detection chamber 3, and the air leakage detection The cavity is provided with an air outlet pipe 4, and an airflow detector 5 is arranged on the air outlet pipe. The signal output terminals of the position sensor and the air flow detector are connected to a controller, which is equipped with a counting unit, and the controller is respectively connected to a pressure and flow discriminator, a warning device, a photoelectric switch, and an electronic display through a signal circuit. The warning device includes buzzer and low flow indicator light, high flow indicator light.

Using the above-mentioned device can complete the detection of the infusion set by the following method, which includes the following steps:

Step 1. Turn on the air source and introduce high-pressure gas into the intake pipeline. When the pressure and flow discriminator judges that the air pressure is the preset value or not, the warning device will send out a prompt signal respectively;

Step 2. When the warning device prompts that the air pressure is the preset value, insert the needle of the input end of the infusion set into the interface.

Step 3. When the position sensor detects that the interface has been inserted into the needle of the input end of the infusion set, the position sensor sends a signal to the controller to control the pressure to be received after receiving the signal and the flow value Q issued by the flow discriminator. The signal is compared with the preset flow value Q ₀ when the infusion set is normal. When the gas flow rate is too low, the controller controls the low flow indicator light to be on, indicating that the test piece has a blockage problem; otherwise, the high flow indicator light is on, which means that the test piece has a gas leakage problem. When there is any fault or blockage or air leakage problem, the buzzer will sound, and it can emit sounds of different lengths and frequencies according to different problems. The system judges whether there is gas flow out of the air leakage detection chamber through the air flow detector. When there is gas flow out, the air flow detector sends a signal to the controller, and the controller judges the interface leakage, and finds the signal through the warning device, and the detection process stops .

Step 4. When Q=Q ₀ , it is determined that the airtightness/ventilation of the infusion set is normal,

When Q﹤Q ₀ , it is determined that the ventilation of the infusion set is not good and there is a blockage problem.

When Q > Q ₀ , it is judged that the airtightness of the infusion set is not good, and there is an air leakage problem.

Example 2:

As shown in Figure 2, the warning device includes a buzzer and/or an indicator light, and the indicator lights include a low flow indicator light, a high flow indicator light, a seal leakage indicator light and a valve blockage indicator light. When the gas flow rate is too low, the controller controls the low flow indicator light to be on, indicating that the test piece has a blockage problem; otherwise, the high flow indicator light is on, which means that the test piece has a gas leakage problem. When there is any fault or blockage or air leakage problem, the buzzer will sound, and it can emit sounds of different lengths and frequencies according to different problems. If there is a problem with the seal between the sealing connection nozzle and the test piece, the gas flows out, and all or most of it flows out from the gas outlet pipe. If there is an air leak between the seals, it will send a signal to the controller, and the controller will warn the operator by controlling the seal leakage indicator to light up. If the pressure valve breaks down and cannot be opened, the flow measured by the system is zero, and when the position sensor obtains the connected parts in place, the flow is still zero, and the controller controls the valve blockage indicator to light up. Other structures are identical with embodiment 1 except warning device. the

Claims (9)

1. transfusion device impermeability/aeration automatic detection device; It is characterized in that; It comprises a source of the gas and an air inlet pipeline that links to each other with source of the gas, and air inlet pipeline is provided with source of the gas clean device, is provided with pressure governor, pressure and flow judging device on the air inlet pipeline behind the source of the gas clearer in order; The end of air inlet pipeline is provided with an interface that is used to connect the transfusion device input end; This interface is other to be provided with a position sensor, and the signal output part of this position sensor links to each other with a controller, and this controller links to each other with alarming device with described pressure and flow judging device respectively through signal circuit.

2. transfusion device impermeability according to claim 1/aeration automatic detection device; It is characterized in that described interface is provided with a pressure valve; The leading end of this pressure valve links to each other with air inlet pipeline, and the outlet side is provided with a mouth that is tightly connected that is used to connect measured piece.

3. transfusion device impermeability according to claim 1 and 2/aeration automatic detection device; The outside that it is characterized in that the described mouth that is tightly connected is provided with a gas leakage test chamber; This gas leakage test chamber is provided with a sealing socket coaxial with the described mouth that is tightly connected; The gas leakage test chamber is provided with an escape pipe, and this escape pipe is provided with a pneumatic detector, and the signal circuit of pneumatic detector links to each other with described controller.

4. transfusion device impermeability according to claim 1/aeration automatic detection device is characterized in that described controller is provided with counting unit, and controller links to each other with an electronic console.

5. transfusion device impermeability according to claim 1/aeration automatic detection device is characterized in that described position sensor is an optoelectronic switch.

6. according to claim 1 or 2 or 4 or 5 described transfusion device impermeability/aeration automatic detection devices, it is characterized in that described alarming device comprises hummer and/or pilot lamp, described pilot lamp comprises low discharge pilot lamp, high flow capacity pilot lamp.

7. transfusion device impermeability according to claim 3/aeration automatic detection device; It is characterized in that described alarming device comprises hummer and/or pilot lamp, described pilot lamp comprises that low discharge pilot lamp, high flow capacity pilot lamp, seal leakage pilot lamp and valve stop up pilot lamp.

8. adopt the described transfusion device impermeability of claim 1/aeration automatic detection device to carry out the method that transfusion device detects, it is characterized in that it comprises the steps:

Step 1, open source of the gas, introduce gases at high pressure to air inlet pipeline, judging air pressure when pressure and flow judging device is preset value or during for preset value, alarming device sends cue respectively;

Step 2, when alarming device prompting air pressure is preset value, insert transfusion device input end syringe needle to described interface;

Step 3, when position sensor is sensed interface and has been inserted transfusion device input end syringe needle; This position sensor promptly sends signal to controller, the signal and preset transfusion device flow value Q just often of the flow value Q that pressure that is about to receive behind this signal of control reception and flow judging device are sent ₀Compare;

Step 4, work as Q=Q ₀The time, judge that transfusion device impermeability/aeration is normal,

As Q ﹤ Q ₀The time, judge that the transfusion device aeration is bad, blockage problem is arranged,

As Q ﹥ Q ₀The time, judge that the transfusion device impermeability is bad, the gas leakage problem is arranged.

9. the method that detects of the transfusion device shown in according to Claim 8; It is characterized in that in the step 3 system judges in the gas leakage test chamber whether have gas to flow out through pneumatic detector, when gas flows out; Pneumatic detector promptly sends signal to controller; Controller is promptly judged interface gas leakage, and finds signal through alarming device, and testing process stops.

Images