CN220893457U - Push injection platform for testing and automatic testing system - Google Patents

Abstract

The utility model provides a push injection platform and an automatic test system for testing, which relate to the field of medical instrument testing and comprise a base and an upper cover which are fixedly connected, wherein a push injection mechanism is locked in a channel formed by the base and the upper cover; the injection mechanism comprises a piston and a syringe; the end of the injection tube is connected with a three-way two-way valve, the three-way two-way valve is respectively connected with a first catheter and a second catheter, the end of the first catheter is connected with a puncture outfit, and the end of the second catheter is sequentially connected with a luer connector and a pipeline to be tested; the device almost meets the test requirements of air tightness and smoothness of all pipeline medical instruments, and has the advantages of simple structure and convenient operation.

Description

Push injection platform for testing and automatic testing system

Technical Field

The utility model relates to the field of medical instrument testing, in particular to a push injection platform for testing and an automatic testing system.

Background

In the prior art, air tightness and smoothness tests are required to be regularly carried out on a pipeline type medical instrument, and the performance level of the pipeline type medical instrument is evaluated based on pushing gas or liquid and by connecting a pressure gauge to observe the pressure condition inside the pipeline. The Chinese patent with the application number of CN202110685801.6 discloses a pressure pipeline testing device, wherein a gas pipe and a gas outlet pipe are respectively fixed at two ends of a tested pipeline, a connecting ring is clung to a pipe orifice and an inner side wall of the tested pipeline, a first rubber ring and an inflatable ring are clung to the outer side wall of the tested pipeline, after the inflatable ring is inflated, the first rubber ring and the inflatable ring are fixed by friction between the first rubber ring and the tested pipeline, and the air tightness is ensured; the one-way valve is connected with the air supply end, air is pumped through the air pump and is sent into the air storage tank, air in the air storage tank is sent into the pipeline on the side through the air pipe, and is discharged to the outside from the air outlet pipe, and the air tightness is tested by measuring the flow parameters of the pipeline to be tested through the pressure sensor and the flow sensor.

In addition, the partial air tightness and smoothness test can be carried out by adopting the common equipment on the market to test the air tightness and pressure intensity of the pipeline medical instruments, including an inflation pressure tester, a leakage tester, a vacuum tester and the like, but the equipment is expensive, and an operator is required to accept a long-time professional training party to be capable of being skillfully operated, so that the equipment is not suitable for being popularized in a large range.

Disclosure of utility model

Based on the problems, the utility model provides a push injection platform for testing, which is connected with a testing platform by using a standard luer connector, and a tested medical instrument pipeline can be easily connected into the testing platform for air tightness and smoothness testing.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The injection platform for testing comprises a base and an upper cover which are fixedly connected, wherein an injection mechanism is locked in a channel formed by the base and the upper cover; the injection mechanism comprises a piston and a syringe; the end of the injection tube is connected with a three-way two-way valve, the three-way two-way valve is respectively connected with a first catheter and a second catheter, the end of the first catheter is connected with a puncture outfit, and the end of the second catheter is sequentially connected with a luer connector and a pipeline to be tested.

Preferably, the injection mechanism comprises a piston and a syringe, the piston is mounted in the syringe and moves along the axial direction of the syringe, a sealed piston cavity is formed between the piston and the inner wall of the syringe, and the volume of the piston cavity changes along with the movement of the piston.

Preferably, the upper surface of base is equipped with an arc concave surface, the joint groove has still been seted up to the arc concave surface, the upper cover has curved invagination region, the invagination region of upper cover surface with the arc concave surface of base forms cylindrical passageway just, the syringe is fixed inside the passageway.

Preferably, the three-way two-way valve comprises a first interface, a second interface and a third interface, wherein the first interface is connected with the tail end of the injection mechanism, the second interface is sequentially connected with the first catheter and the puncture outfit, and the third interface is connected with the luer connector through a connecting pipe.

Preferably, the first catheter is fixedly connected with the second interface and the puncture outfit, and the second catheter is fixedly connected with the connecting pipe and the luer connector through adhesive materials.

Preferably, the first interface is provided with external threads, the tail end of the injection tube is provided with internal threads, and the first interface is fixedly connected with the injection tube through threads.

The utility model also provides an automatic test system, which comprises the injection platform as claimed in any one of the above, and further comprises a push rod, wherein one end of the push rod is fixed at the tail end of the piston, the other end of the push rod is fixed on a driving mechanism, and the movement direction of the driving mechanism is parallel to the axes of the push rod and the injection tube.

Preferably, the driving mechanism comprises a supporting seat, a guide rail is fixed on the supporting seat, a sliding block capable of moving along the guide rail is matched on the guide rail, a fixing flange is arranged in the sliding block, a screw rod is arranged above the guide rail in parallel, the screw rod penetrates through the fixing flange in the sliding block and is connected with the fixing flange through threads, one end of the screw rod is fixed on the supporting seat through a bearing, the other end of the screw rod is fixedly connected with a driver through a coupler, and the driver is fixed on the supporting seat.

Preferably, the driver is a servo motor and a speed reducer.

Preferably, the device further comprises a controller and a power supply, wherein the controller and the power supply are electrically connected with the driving mechanism.

Compared with the prior art, the utility model has the following advantages:

In the pushing and injecting platform for testing, the pushing and injecting mechanism for storing liquid/gas is connected with the three-way two-way valve, the luer connector is introduced, liquid or gas can be injected into the injection tube in the reciprocating motion of the piston, the air tightness and smoothness are tested in the process of applying pressure (hydraulic pressure or air pressure) to the pipeline later, and the gas or liquid action direction is limited by the three-way two-way connector, so that automatic liquid and air supplementing and pushing to the tested pipeline in the pushing and drawing processes of the injector can be realized;

The utility model also provides an automatic test system, the injector is fixed with the injection rod, the servo motor based on the injector realizes the uniform motion of the push rod by driving the screw rod, the push rod can reciprocate along with the forward and backward rotation of the motor to achieve the effect of automatically injecting liquid or gas and drawing the piston at uniform speed, the injection of the liquid or gas into the injection mechanism is completed in the reciprocating motion of the screw rod, when the air tightness and the smoothness of a pipeline are tested, an operator does not need to detach the injector to supplement liquid, only needs to operate the computer to control the motor or replace the tested pipeline, the whole process is simple and convenient, the high-precision test can be realized under the cooperation of the servo motor, the screw rod and other transmission components, and the performance analysis of pipeline medical instrument products is facilitated.

Drawings

FIG. 1 is a schematic diagram of a bolus platform configuration for testing;

FIG. 2 is a schematic exploded view of a structure of a bolus platform for testing;

FIG. 3 is a schematic diagram of the structure of a three-way two-way valve in a bolus platform for testing;

FIG. 4 is a schematic diagram of the overall structure of an automatic test system;

FIG. 5 is a schematic diagram of a drive mechanism in an automatic test system;

Reference numerals:

1-a base; 2-an upper cover; 3-a bolus mechanism; 301-syringe; 302-a piston; 4-three-way two-way valve;

401-a first interface; 402-a second interface; 403-third interface; 5-connecting pipes; 6-a second conduit;

7-luer fitting; 8-a first conduit; 9-puncture outfit; 10-a bottom plate; 11-push rod; 12-connecting blocks; 13-a slider;

14-a supporting seat; 15-a guide rail; 16-a fixed flange; 17-screw rod; 18-a coupling; 19-a servo motor;

20-a power supply; 21-controller.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present utility model more clear, the technical solution of the present utility model will be clearly and completely described below in connection with the embodiments of the present utility model.

In the description of the present application, it should be understood that the terms "orientation" or "positional relationship" as used herein are merely for convenience of description and to simplify the description of the present application, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Example 1

As shown in fig. 1-3, the present utility model provides a bolus platform for testing, the bolus platform specifically comprising:

the base 1 is I-shaped, can provide enough supporting force, the upper surface of the base 1 is provided with an arc-shaped concave surface, the arc-shaped concave surface is also provided with a clamping groove, and the arc-shaped concave surface can just support the injection mechanism 3; the injection mechanism 3 comprises a piston 302 and a syringe 301, wherein the piston 302 is installed in the syringe 301 and moves along the axial direction of the syringe 301, a piston cavity is formed between the piston 302 and the inner wall of the syringe 301, and the volume of the piston cavity changes along with the movement of the piston 302. In a normal state, the length of the piston 302 is longer than the length of the syringe 301, and thus, the operator can push the piston 302 to move inside the syringe 301 by sending outside. The tail end of the injection tube 301 is provided with a limiting plate which can be just clamped on the clamping groove of the arc-shaped concave surface, so that the stability of the injection mechanism 3 is enhanced; in order to enable the injection mechanism 3 to be fixed on the base 1 and not to deviate, an upper cover 2 is further arranged above the base 1, the upper cover 2 is plate-shaped and is provided with an arc-shaped inward sinking area, the upper cover 2 is fixed on the upper surface of the base 1 through threaded connection, a cylindrical channel is formed right by the inward sinking area on the surface of the upper cover 2 and the arc-shaped concave surface of the base 1, the injection tube 301 of the injection mechanism 3 is fixed inside the channel, locking force can be controlled through threads, deviation of the injection mechanism 3 in the piston movement process is prevented, and deviation of a test result is caused.

One end of the injection tube 301 is provided with an injection port, and the injection port is connected with a three-way two-way valve 4, wherein the three-way two-way valve 4 belongs to a pipeline interface, preferably a T-shaped port valve, and a first interface 401, a second interface 402 and a third interface 403 are arranged; the first connector 401 of the three-way two-way valve 4 is provided with external threads, the injection port of the injection tube 301 is provided with internal threads, and the three-way two-way valve 4 and the injection tube 301 can be firmly connected through threaded connection; the three-way two-way valve 4 can enable at least two of the first interface 401, the second interface 402 and the third interface 403 to be in a connected state through the adjustment of the valve. The second interface 402 and the third interface 403 are respectively connected with the first conduit 8 and the connecting pipe 5, specifically, the second interface 402 is connected with the first conduit 8, and the third interface 403 is connected with the connecting pipe 5; the other end of the first catheter 8 is connected with a puncture outfit 9, and the other end of the luer connector 5 is sequentially connected with a second catheter 6 and a luer connector 7; the standard luer connector 7 is adopted as an interconnection element between the pipeline medical instrument testing platform and the tested object, the connector can be detachably connected with the interconnection device so as to be reassembled, and in view of the fact that the standard luer connector 7 is commonly used for the interface of the pipeline medical instrument and can be replaced by an adaptive connector if a special interface is met, the platform almost meets the air pressure or hydraulic testing requirements of all the pipeline medical instruments; the connection mode between the above components is a threaded connection or other connection modes with stronger sealing performance, preferably, one end of the first conduit 8 is coated with an adhesive material such as uv glue, and then inserted into the second interface 402 of the three-way two-way valve 4, the outer surface of the other end of the first conduit 8 is coated with an adhesive material such as cyclohexanone, and inserted into the puncture outfit to be bonded with the two-way valve; two ends of the second conduit 6 are coated with adhesive materials such as uv glue, and then are respectively inserted into the connecting pipe 5 and the luer connector 7, and the combined conduit is placed under a uv lamp for solidification, so that the bonding firmness and the sealing performance are improved; the connecting pipe 5 is provided with external threads, the third connector 403 of the three-way two-way valve 4 is provided with internal threads, and the connecting pipe 5 and the three-way two-way valve 4 can be firmly connected through threaded connection. Preferably, wherein the second conduit 6 is parallel or coincident with the axis of the syringe 301, the first conduit 8 is perpendicular to said second conduit 6.

The using method of the injection platform for air tightness test comprises the following steps:

The first interface 401, the second interface 402 and the third interface 403 in the three-way two-way valve 4 are communicated, the puncture outfit 9 is immersed in enough distilled water, the piston 302 is repeatedly pulled and pushed, and finally the injection tube 301, the first guide tube 8 and the second guide tube 6 are filled with distilled water;

the luer connector 7 is connected with a pipeline to be tested, an output end or other exhaust ports of the pipeline to be tested are plugged to form a closed pipeline, the second connector 402 in the three-way two-way valve 4 is closed, the first connector 401 and the third connector 403 are connected, the piston 302 is pushed to advance along the axial direction of the injection tube 301, liquid can only advance through the third connector 403 of the three-way two-way valve 4, and can not pass through the second connector 402, whether the pipeline to be tested leaks is observed, and if the pipeline to be tested leaks, the position of the leak can be judged according to the position of the leaked liquid.

The using method of the push injection platform for pipeline smoothness test comprises the following steps:

The luer connector 7 is connected with a common three-way connector, the other two ends of the common three-way connector are respectively communicated with a pipeline to be tested and a pressure gauge, the output end of the pipeline to be tested is ensured to be open, no other liquid outlet exists, the pressure gauge is connected with the common three-way connector after being calibrated in advance, and the puncture outfit 9 is immersed in enough water;

Repeatedly drawing the piston 302, and continuously sucking water into the injection tube 301 and pushing the water into the pipeline to be tested until the pipeline to be tested is full of water under the action of the three-way two-way valve 4; at this time, the peak function of the pressure gauge is started when the piston 302 is retreated to the limit position, and whether the maximum pressure in the process meets the requirement of smoothness performance is read when the piston 302 is advanced to the limit position.

Example two

The structure in this embodiment is similar to that in the first embodiment, and differs from the first embodiment in that:

the using method of the push injection platform for the air tightness test comprises the following steps:

the first interface 401, the second interface 402 and the third interface 403 in the three-way two-way valve 4 are communicated, the piston 302 is repeatedly pulled, gas is sucked into the injection tube 301 from the puncture outfit 9, and the piston 302 is positioned in the injection tube 301 at a position far away from the three-way two-way valve 4, so that a piston cavity filled with gas exists in the injection tube 301;

The luer connector 7 is connected with a common three-way connector, the other two ends of the common three-way connector are respectively communicated with a pipeline to be tested and a pressure gauge, the output end of the pipeline to be tested or other exhaust ports are plugged to form a closed pipeline, the pressure gauge is connected with the common three-way connector after zero calibration in advance, and the pipeline to be tested can be immersed in water after connection is completed so as to observe where to leak; the second port 402 of the three-way two-way valve 4 is closed, the first port 401 and the third port 403 are connected, the piston 302 is pushed to advance along the axial direction of the injection tube 301, and gas can only advance through the third port 403 of the three-way two-way valve 4 and cannot pass through the second port 402, so that the internal pressure of a pipeline to be tested is gradually increased. By observing the pressure gauge, when the pressure value meets the test requirement, pushing of the piston 302 can be stopped, timing is started, and the pipeline to be tested is observed, if the pressure does not obviously drop within the set time or a large number of bubbles are found to escape, the air tightness is disqualified, and if the pressure does not obviously drop within the set time and no bubbles escape, the air tightness is qualified. The air tightness is examined whether the strength of each connecting position of the tested pipeline meets the requirement.

Example III

The structure in this embodiment is similar to that in the first and second embodiments, and differs from the above-described embodiments in that: the three-way two-way valve 4 can be replaced by a combination of a common three-way joint and two one-way valves.

Example IV

The utility model also provides an automatic test system which uses the injection platform as described in the first to third embodiments and can realize the effect of automatically testing the air tightness and smoothness of the pipeline.

As shown in fig. 4 and 5, the automatic test system includes a bolus platform as described in the first and second embodiments, and in addition, includes a base plate 10, and the bolus platform is fixed to the base plate 10. The end of the piston 302 is connected to a push rod 11, and the axis of the push rod 11 coincides with the axis of the injection tube 301. The other end of the push rod 11 is fixed on a driving mechanism, and the movement direction of the driving mechanism is parallel to the axes of the push rod 11 and the injection tube 301, so that the driving mechanism can push the push rod 11 to move, and further push the piston 302 to realize drawing movement inside the injection tube 301.

Specifically, the driving mechanism comprises a supporting seat 14 fixed on the bottom plate 10, a guide rail 15 is fixed on the supporting seat 14, the guide rail 15 is parallel to the push rod 11, a sliding block 13 capable of moving along the guide rail 15 is cooperatively arranged on the guide rail 15, a fixed flange 16 is arranged in the sliding block, a screw rod 17 is arranged above the guide rail 15 in parallel, the screw rod 17 penetrates through the fixed flange 16 in the sliding block 13 and is connected with the fixed flange 16 through threads, one end of the screw rod 17 is fixed on the supporting seat through a bearing, the inner diameter of the bearing is matched with the outer diameter of the end part of the screw rod 17, the other end of the bearing is fixedly connected with a driver through a coupler 18, and the driver is fixed on the supporting seat, preferably, the driver is a servo motor 19 and a speed reducer; the upper surface of the sliding block is fixedly provided with a connecting block 12, wherein the connecting block 12 is connected with the tail end of the push rod 11. Therefore, the output rod of the servo motor 19 rotates, the screw rod 17 is driven to synchronously rotate through the coupler 18, the sliding block 13 is further driven to move, the rotary motion is converted into linear motion, the sliding block 13 can move along the guide rail 15, the push rod 11 is further driven to move, and the piston 302 is further driven to realize drawing motion in the injection tube 301. The piston 302 can reciprocate with the forward and reverse rotation of the motor to achieve the effects of automatic bolus injection and withdrawal.

Preferably, the automatic test system further comprises a controller 21 and a power supply 20, the controller 21 and the power supply 20 are electrically connected with the servo motor 19, the controller 21 can control the servo motor 19 to achieve the purpose of injecting liquid or gas at a constant speed by driving the screw rod 17, automatic operation is achieved, repeated circulation tests under a constant state can be achieved, an operator does not need to detach the injector to supplement liquid, only the controller 21 is required to be operated to control the servo motor 19 or replace a pipeline to be tested, the whole process is simple and convenient, the test efficiency and the test precision are improved, and performance analysis of pipeline medical instrument products is facilitated.

The foregoing is a description of embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements, such as changing the moving structure, etc., may be made by those skilled in the art without departing from the spirit of the present utility model, and these obvious alternatives are intended to be within the scope of the present utility model.

Claims (10)

1. A bolus platform for testing, characterized by:

the device comprises a base and an upper cover which are fixedly connected, wherein a pushing injection mechanism is locked in a channel formed by the base and the upper cover; the injection mechanism comprises a piston and a syringe; the end of the injection tube is connected with a three-way two-way valve, the three-way two-way valve is respectively connected with a first catheter and a second catheter, the end of the first catheter is connected with a puncture outfit, and the end of the second catheter is sequentially connected with a luer connector and a pipeline to be tested.

2. A bolus platform for testing as recited in claim 1, wherein: the injection mechanism comprises a piston and an injection tube, wherein the piston is arranged in the injection tube and moves along the axial direction of the injection tube, a sealed piston cavity is formed between the piston and the inner wall of the injection tube, and the volume of the piston cavity changes along with the movement of the piston.

3. A bolus platform for testing as recited in claim 2, wherein: the upper surface of base is equipped with an arc concave surface, the joint groove has still been seted up to the arc concave surface, the upper cover has curved invagination region, the invagination region of upper cover surface with the arc concave surface of base forms columniform passageway just, the injection tube is fixed inside the passageway.

4. A bolus platform for testing as recited in claim 1, wherein: the three-way two-way valve comprises a first interface, a second interface and a third interface, wherein the first interface is connected with the tail end of the injection mechanism, the second interface is sequentially connected with the first catheter and the puncture outfit, and the third interface is connected with the luer connector through a connecting pipe.

5. A bolus platform for testing as recited in claim 4, wherein: the first guide tube is fixedly connected with the second connector and the puncture outfit, and the second guide tube is fixedly connected with the connecting tube and the luer connector through viscous materials.

6. A bolus platform for testing as recited in claim 4, wherein: the first interface is provided with external threads, the tail end of the injection tube is provided with internal threads, and the first interface is fixedly connected with the injection tube through threads.

7. An automated testing system comprising the bolus platform according to any one of claims 1-6, wherein: the injection device further comprises a push rod, one end of the push rod is fixed at the tail end of the piston, the other end of the push rod is fixed on a driving mechanism, and the movement direction of the driving mechanism is parallel to the axes of the push rod and the injection tube.

8. An automatic test system as recited in claim 7 wherein: the driving mechanism comprises a supporting seat, a guide rail is fixed on the supporting seat, a sliding block capable of moving along the guide rail is matched on the guide rail, a fixing flange is arranged in the sliding block, a screw rod is arranged above the guide rail in parallel and penetrates through the fixing flange in the sliding block and is connected with the fixing flange through threads, one end of the screw rod is fixed on the supporting seat through a bearing, the other end of the screw rod is fixedly connected with a driver through a coupler, and the driver is fixed on the supporting seat.

9. An automatic test system as recited in claim 8 wherein: the driver is a servo motor and a speed reducer.

10. An automatic test system as recited in claim 7 wherein: the device also comprises a controller and a power supply, wherein the controller and the power supply are electrically connected with the driving mechanism.