CN117054006A - Device and method for detecting sealing performance of needle tube of injector - Google Patents
Device and method for detecting sealing performance of needle tube of injector Download PDFInfo
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- CN117054006A CN117054006A CN202311302321.2A CN202311302321A CN117054006A CN 117054006 A CN117054006 A CN 117054006A CN 202311302321 A CN202311302321 A CN 202311302321A CN 117054006 A CN117054006 A CN 117054006A
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- piston
- detection
- needle tube
- needle
- connector
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 title claims description 29
- 238000001514 detection method Methods 0.000 claims abstract description 111
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/223—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
Abstract
The application relates to the technical field of needle tube tightness detection, and discloses a device and a method for detecting the needle tube tightness of an injector, wherein the device comprises a bottom plate, a turntable mechanism, a detection mechanism and a lifting mechanism, the detection mechanism comprises a piston, a connector and a detection cylinder, the connector is in sliding connection with the piston, an elastic piece is arranged between the connector and the piston, and a containing cavity for containing an object to be detected is formed in the detection cylinder; the sliding seat is arranged on the outer side of the piston in a sliding way, the air inlet mechanism for introducing detection air into the object to be detected is arranged in the piston, and a first switch for controlling the opening of the air inlet mechanism is arranged at the joint of the piston and the sliding seat. According to the application, the tightness of the joint of the needle tube and the needle head is detected by arranging the piston, the connector and the detection cylinder, so that the tightness of the joint of the needle tube and the needle head can be rapidly and effectively detected, the obtained detection result is easy to observe, and the phenomenon of false detection and missing detection is avoided.
Description
Technical Field
The application particularly relates to the technical field of needle tube tightness detection, in particular to a device and a method for detecting the needle tube tightness of an injector.
Background
Syringes are a common medical device. As early as 15 th century, italian katidier proposed the principle of a syringe, mainly with a needle for drawing or injecting gas or liquid. Syringes may also be used for injection of medical devices, containers, such as scientific instruments in chromatography, through rubber diaphragms.
Adhesives are commonly used in the production of current syringes, including epoxy resins, quick-setting adhesives, and photo-setting adhesives. When assembled, the stainless steel needle tube or needle is inserted through the cylindrical barrel into the pintle, which is generally slightly larger in diameter than the needle tube. The joint of the needle bolt and the needle cylinder is an insertion starting point, the needle bolt penetrates out from the center of the needle bolt, and adhesive can be attached to the periphery of the needle bolt. The design of the joint is critical to the assembly of the needle bolt and the needle tube, and the proper design is matched with the adhesive, so that the injector has good tightness, injection liquid can not drip or flow randomly, and the needle head can be smoothly pushed or pulled out in the use process;
after the production of the injector is finished, the tightness of the joint of the needle tube and the needle head is required to be detected, so that the injector can be used normally and limitedly, good products and defective products cannot be separated accurately by the tightness detection device in the prior art, the phenomena of false detection and missing detection are easily caused, and the accuracy of the detection result of the injector is affected.
Disclosure of Invention
The application aims to provide a device and a method for detecting the sealing performance of a needle tube of an injector, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present application provides the following technical solutions:
the utility model provides a needle tubing sealing performance detection device of syringe, includes bottom plate, carousel mechanism, detection mechanism and elevating system, detection mechanism includes piston, connector and detection section of thick bamboo, connector and piston sliding connection, and is provided with the elastic component between connector and the piston, the inside of detection section of thick bamboo has been seted up and has been held the holding chamber of awaiting measuring object;
the rotary table mechanism comprises a rotary table and a rotating mechanism for controlling the rotary table to rotate, and at least one placing groove for accommodating the detection cylinder is formed in the rotary table;
the lifting mechanism comprises a lifting adjusting mechanism and a telescopic piece, the connector is connected with the telescopic end of the telescopic piece, and the telescopic end of the telescopic piece stretches to control the piston to be inserted into an object to be tested;
the outer side of the piston is slidably provided with a sliding seat, an air inlet mechanism for introducing detection gas into the object to be detected is arranged in the piston, a first switch for controlling the opening of the air inlet mechanism is arranged at the joint of the piston and the sliding seat, and when the piston is in a first state, the first switch controls the opening of the air inlet mechanism so as to introduce the detection gas into the object to be detected;
the outer side of the detection cylinder is provided with a second display mechanism which is communicated with the accommodating cavity, when a leakage point exists at the joint of the needle tube and the needle head, detection gas enters the second display mechanism from the accommodating cavity, the second display mechanism contacts the detection gas and then sends out a first display signal, and the first display signal indicates that the joint of the needle tube and the needle head has leakage;
in addition, it should be noted that, the first state is after the piston is inserted into the object to be measured, that is, after the piston is inserted into the needle tube; the first display mechanism is installed on the connector, a second switch for controlling the first display mechanism to be started is arranged at the joint of the connector and the piston, and when the piston is in a second state, the second switch controls the first display mechanism to be started so as to indicate that the sealing performance of the joint of the needle tube and the needle head is good.
As a further scheme of the application: the first switch comprises a first sliding block and a second sliding block, a plurality of sliding grooves are formed in the periphery of the piston, the first sliding block and the second sliding block are slidably arranged in the sliding grooves, and the first sliding block is connected with the sliding grooves through a first spring; the sliding seat is provided with a socket towards one side of the piston, and the second sliding block stretches into the socket.
As still further aspects of the application: the air inlet mechanism comprises a power supply and a second air pump which are arranged in the piston, the power supply is electrically connected with the second air pump, electrode plates are arranged on opposite sides of the first sliding block and the second sliding block, and the power supply is electrically connected with the electrode plates through wires.
As still further aspects of the application: the bottom of the piston is provided with an air outlet, the exhaust end of the second air pump is communicated with the air outlet, and the air outlet is provided with a one-way valve; and the piston is also provided with an air inlet pipe for supplying air to the second air pump.
As still further aspects of the application: the elastic piece arranged between the connector and the piston is a second spring, a stand column is arranged on one side, facing the connector, of the piston, a slot for the stand column to slide is formed in the connector, and the stand column is connected with the slot through the second spring; the second switch is a first electrode plate arranged at the top of the piston and a second electrode plate arranged at the bottom of the connector, and the first electrode plate and the second electrode plate are electrically connected with the first display mechanism.
As still further aspects of the application: two open slots are symmetrically formed in the left side and the right side of the detection cylinder, a flow guide pipe is slidably arranged in the open slot on the same side as the second display mechanism, the flow guide pipe is connected with the bottom of the open slot through a third spring, an adjusting rod is rotatably arranged in the open slot on the other side, and a thread section is arranged on the upper portion of the adjusting rod; the left side and the right side of the sliding seat are symmetrically provided with a first push plate and a second push plate, the shapes of the first push plate and the second push plate are matched with the open slot, and the bottom of the second push plate is fixedly provided with a screw sleeve.
As still further aspects of the application: the air cavity is arranged in the honeycomb duct, the air outlet hole is arranged on one side of the honeycomb duct, the air inlet hole is arranged on the other side of the honeycomb duct, the air outlet hole is positioned above the air inlet hole, the air exhaust channel is arranged in the piston, one end of the air exhaust channel is communicated with the accommodating cavity, and the other end of the air exhaust channel is communicated with the opening groove provided with the honeycomb duct.
As still further aspects of the application: the device is characterized by further comprising a baffle, wherein the baffle is fixedly connected with the adjusting rod, an arc-shaped groove is formed in the bottom of the detection cylinder, an exhaust port is formed in the arc-shaped groove, and the exhaust port is communicated with the accommodating cavity; an exhaust head and a blocking head are arranged on one side of the baffle, facing the arc-shaped groove.
As still further aspects of the application: the second display mechanism comprises a mounting seat, a lampshade and a lamp cap which are fixedly mounted on the detection barrel, a driving cavity is formed in the tail portion of the lampshade, a first electrode is fixedly mounted in the driving cavity, a second electrode is slidably mounted in the driving cavity, the first electrode and the second electrode are connected through a fourth spring, the first electrode and the second electrode are electrically connected with the lamp cap, and a gas inlet is formed in the mounting seat.
As still further aspects of the application: the rotating mechanism comprises a gear box, a first motor and a rotating shaft, wherein the gear box is arranged on the bottom plate, the first motor is arranged on the gear box, the first motor is in transmission connection with the rotating shaft through the gear box, the rotating shaft is fixedly connected with the rotating disc so as to drive the rotating disc to rotate, the detection cylinder is aligned with the piston, and after the detection of an object to be detected in one of the detection cylinders is completed, the detection cylinder next provided with the object to be detected is aligned with the piston.
As still further aspects of the application: the rotary shaft is further provided with a first air pump, and the first air pump is communicated with the exhaust head through an air pipe and used for vacuumizing the accommodating cavity and the inside of the object to be detected before air tightness detection.
As still further aspects of the application: the lifting adjusting mechanism comprises a frame, a lifting screw rod rotatably arranged on the frame and a lifting screw sleeve slidably arranged on the frame, wherein the lifting screw rod is in threaded connection with the lifting screw sleeve, and the lifting screw sleeve is connected with the telescopic piece through a lifting seat and used for controlling the height of the telescopic piece.
As still further aspects of the application: and the rack is also provided with a driving motor, and the driving motor is in transmission connection with the lifting screw rod through a bevel gear set and is used for driving the lifting screw rod to rotate.
The detection method of the needle tube sealing performance detection device of the injector comprises the following steps:
step one, adjusting the rotation of a turntable, so that a detection cylinder of an object to be detected is arranged on the turntable and is aligned with a piston at the telescopic end of a telescopic piece;
controlling the extension of the extension end of the extension piece, driving the piston to be inserted into the needle tube provided with the needle head, starting the first air pump, and vacuumizing the accommodating cavity of the detection tube and the interior of the needle tube;
step three, continuously controlling the extension of the extension end of the extension piece, driving the piston to reach a first state, releasing detection gas into the needle tube by the second air pump, and observing whether the second display mechanism sends out a first display signal after waiting for a period of time;
step four, when the second display mechanism sends out the first display signal, the detection is completed, and the detection result is that the joint of the needle tube and the needle head is leaked; when the second display mechanism does not send out the first display signal, the extension of the extension end of the extension piece is controlled continuously, the connector is in contact with the piston, whether the first display mechanism sends out the second display signal or not is observed, when the first display mechanism sends out the second display signal, detection is completed, the detection result is that no leakage exists at the joint of the needle tube and the needle head, and the tightness is good.
Compared with the prior art, the application has the beneficial effects that: the application detects the tightness of the joint of the needle tube and the needle head by arranging the piston, the connector and the detection tube, in the detection process, the piston is driven to be inserted into the needle tube with the needle head, the first air pump is started, the detection tube accommodating cavity and the interior of the needle tube are vacuumized, then the piston is driven to reach the first state, the detection gas is released into the interior of the needle tube by the second air pump, and whether the second display mechanism sends out a first display signal is observed; when the second display mechanism sends out the first display signal, the detection is completed, and the detection result is that the joint of the needle tube and the needle head is leaked; when the second display mechanism does not send out the first display signal, the expansion end of the expansion piece is controlled to extend continuously, the connector is in contact with the piston, whether the first display mechanism sends out the second display signal or not is observed, when the first display mechanism sends out the second display signal, detection is completed, the joint of the needle tube and the needle head does not leak, the tightness is good, accordingly the tightness of the joint of the needle tube and the needle head can be detected rapidly and effectively, the obtained detection result is easy to observe, and the phenomena of false detection and missing detection are avoided.
Drawings
Fig. 1 is a schematic structural view of a device for detecting the sealing performance of a needle tube of an injector.
Fig. 2 is a front view of a syringe sealing performance detecting apparatus of the injector.
Fig. 3 is a side view of a syringe sealing performance detection apparatus.
Fig. 4 is a schematic view of the structure of the detecting mechanism in the device for detecting the sealing performance of the needle tube of the injector.
Fig. 5 is a schematic diagram II of the structure of the detecting mechanism in the device for detecting the sealing performance of the needle tube of the injector.
Fig. 6 is an enlarged partial schematic view at a in fig. 5.
Fig. 7 is a partially enlarged schematic view at B in fig. 5.
Fig. 8 is a schematic structural view of a flow guide tube in the syringe needle sealing performance detection device.
Fig. 9 is a schematic view of the structure of a detection cylinder in the syringe needle sealing performance detection device.
Fig. 10 is a schematic view of the structure of a baffle in a device for detecting the sealing performance of a needle tube of an injector.
Fig. 11 is a schematic structural view of a second display mechanism in the syringe needle sealability detection device.
In the figure: 10-bottom plate, 20-carousel mechanism, 21-gear box, 22-first motor, 23-rotation axis, 24-carousel, 25-first air pump, 26-trachea, 30-detection mechanism, 31-piston, 311-column, 312-first slider, 313-first spring, 314-second slider, 315-wire, 316-power supply, 317-second air pump, 318-check valve, 32-connector, 321-first display mechanism, 322-second spring, 33-slide seat, 331-first push plate, 332-second push plate, 3321-screw sleeve, 34-detection cylinder, 341-guide tube, 3411-vent, 3412-air cavity, 3413-air inlet, 342-third spring, 343-adjustment rod, 344-vent channel, 35-second display mechanism, 351-mount, 352-lamp housing, 353-lamp cap, 354-first electrode, 355-fourth spring, 356-second electrode, 36-baffle, vent head, 362-plug, 37-arc groove 361, 38-vent, 40-motor, 40-lift mechanism, 341-guide tube, 3411-vent, 3412-air outlet, 3412-cavity, 3413-third spring, 343-second display mechanism, 351-mount, 352-lamp cap, 354-arc groove, and lifting mechanism, 40-lift screw, 46-lift mechanism, and lifting mechanism.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1-7, in the embodiment of the present application, a device for detecting sealing performance of a syringe needle tube includes a base plate 10, a turntable mechanism 20, a detecting mechanism 30 and a lifting mechanism 40, where the detecting mechanism 30 includes a piston 31, a connector 32 and a detecting cylinder 34, the connector 32 is slidably connected with the piston 31, an elastic member is disposed between the connector 32 and the piston 31, a containing cavity for containing an object 50 to be detected is formed in the detecting cylinder 34, and as shown in fig. 4, the object 50 to be detected is attached to an inner wall of the containing cavity during detection, in this embodiment, the object 50 to be detected is a syringe needle tube with a needle, and the detecting mechanism 30 is used for detecting sealing performance at a joint of the needle and the needle tube;
the turntable mechanism 20 comprises a turntable 24 and a rotating mechanism for controlling the turntable 24 to rotate, and at least one placement groove for accommodating the detection cylinder 34 is formed on the turntable 24; the lifting mechanism 40 comprises a lifting adjusting mechanism and a telescopic member 44, the connector 32 is connected with the telescopic end of the telescopic member 44, and the telescopic end of the telescopic member 44 is extended to control the piston 31 to be inserted into the object 50 to be tested.
The sliding seat 33 is slidingly installed at the outer side of the piston 31, an air inlet mechanism for introducing detection air into the object 50 to be detected is arranged in the piston 31, a first switch for controlling the opening of the air inlet mechanism is arranged at the joint of the piston 31 and the sliding seat 33, and when the piston 31 is in a first state, the first switch controls the opening of the air inlet mechanism so as to introduce the detection air into the object 50 to be detected; the outer side of the detection cylinder 34 is provided with a second display mechanism 35, the second display mechanism 35 is communicated with the accommodating cavity, when a leakage point exists at the joint of the needle tube and the needle head, detection gas enters the second display mechanism 35 from the accommodating cavity, the second display mechanism 35 contacts the detection gas and then sends out a first display signal, and the first display signal indicates that leakage exists at the joint of the needle tube and the needle head; in addition, the first state is when the piston 31 is inserted into the object 50 to be measured, that is, after being inserted into the needle tube.
The first display mechanism 321 is installed on the connector 32, a second switch for controlling the first display mechanism 321 to be turned on is arranged at the joint of the connector 32 and the piston 31, and when the piston 31 is in a second state, the second switch controls the first display mechanism 321 to be turned on so as to send out a second display signal, and the second display signal indicates that the sealing performance of the joint of the needle tube and the needle head is good;
it should be noted that, when the tightness of the connection between the needle tube and the needle head is good, the detected gas is filled in the object 50 to be detected, the piston 31 is kept unchanged after moving downward to the maximum position, the connector 32 is continuously pressed down, the connector 32 contacts with the piston 31, and the second switch is turned on, which is understood to be the contact state of the piston 31 and the connector 32.
Further, in the embodiment of the present application, the first switch includes a first slider 312 and a second slider 314, a plurality of sliding grooves are formed on the periphery of the piston 31, the first slider 312 and the second slider 314 are slidably mounted in the sliding grooves, and the first slider 312 is connected with the sliding grooves through a first spring 313; the sliding seat 33 is provided with a socket towards one side of the piston 31, the second sliding block 314 extends into the socket, in an initial state, as shown in fig. 4, the first sliding block 312 and the second sliding block 314 are separated, when the piston 31 moves towards the detection cylinder 34, the sliding seat 33 contacts with the detection cylinder 34, the sliding seat 33 drives the second sliding block 314 to slide towards the first sliding block 312, and the first sliding block 312 contacts with the second sliding block 314;
the air inlet mechanism comprises a power supply 316 and a second air pump 317 which are arranged in the piston 31, wherein the power supply 316 is electrically connected with the second air pump 317, electrode plates are arranged on opposite sides of the first sliding block 312 and the second sliding block 314, the power supply 316 is also electrically connected with the electrode plates through a lead 315, and after the first sliding block 312 is contacted with the second sliding block 314, the electrode plates of the first sliding block 312 are contacted with the electrode plates of the second sliding block 314 to be closed, so that a circuit is conducted, the power supply 316 supplies power to the second air pump 317, the second air pump 317 is started, and detection gas is introduced into the object 50 to be detected;
it should be noted that, in the embodiment of the present application, an air outlet is provided at the bottom of the piston 31, an air outlet end of the second air pump 317 is communicated with the air outlet, a one-way valve 318 is provided on the air outlet, and a gas flowing direction in the one-way valve 318 is flowing out from the interior of the piston 31; the piston 31 is further provided with an air inlet pipe (not shown) for supplying air to the second air pump 317 for supplying the detection gas.
In addition, in the embodiment of the present application, the elastic member disposed between the connector 32 and the piston 31 is a second spring 322, a stand column 311 is disposed on one side of the piston 31 facing the connector 32, a slot for sliding the stand column 311 is disposed inside the connector 32, and the stand column 311 is connected with the slot through the second spring 322; the second switch is a first electrode plate arranged at the top of the piston 31 and a second electrode plate arranged at the bottom of the connector 32, the first electrode plate and the second electrode plate are electrically connected with the first display mechanism 321, when the tightness of the needle tube and the needle head is good, the interior of the object 50 to be detected is filled with detection gas, the piston 31 cannot be further pressed down, the connector 32 is continuously pressed down, the connector 32 is in contact with the piston 31, the first electrode plate and the second electrode plate are in contact with each other and close a power supply circuit of the first display mechanism 321, the first display mechanism 321 sends out a second display signal, and the second display signal indicates that the tightness of the joint of the needle tube and the needle head is good.
Referring to fig. 4, 5 and 7 again, in the embodiment of the present application, two open slots are symmetrically formed on the left and right sides of the detection cylinder 34, a flow guide tube 341 is slidably installed inside the open slot on the same side as the second display mechanism 35, the flow guide tube 341 is connected to the bottom of the open slot through a third spring 342, an adjusting rod 343 is rotatably installed inside the open slot on the other side, and a threaded section is provided on the upper portion of the adjusting rod 343; the first pushing plate 331 and the second pushing plate 332 are symmetrically installed on the left and right sides of the sliding seat 33, the shapes of the first pushing plate 331 and the second pushing plate 332 are matched with the open slot, a threaded sleeve 3321 is fixedly installed at the bottom of the second pushing plate 332, when the sliding seat 33 moves downwards along with the piston 31, the first pushing plate 331 pushes the flow guide tube 341 to move downwards, and the second pushing plate 332 drives the threaded sleeve 3321 to move downwards and contact and cooperate with a threaded section on the adjusting rod 343 so as to drive the adjusting rod 343 to rotate;
further, in the embodiment of the present application, as shown in fig. 8, an air cavity 3412 is formed in the guide tube 341, an air outlet hole 3411 is formed on one side of the guide tube 341, an air inlet hole 3413 is formed on the other side of the guide tube 341, and the air outlet hole 3411 is located above the air inlet hole 3413; as shown in fig. 4, an exhaust channel 344 is disposed in the piston 31, one end of the exhaust channel 344 is communicated with the accommodating cavity, the other end of the exhaust channel 344 is communicated with an opening slot provided with a flow guide tube 341, in an initial state, the flow guide tube 341 is lifted upwards under the action of the elastic force of a third spring 342, an air inlet 3413 is separated from the exhaust channel 344, the air in the accommodating cavity cannot enter the flow guide tube 341, and when the piston 31 moves down and is in a first state, the first push plate 331 drives the flow guide tube 341 to slide down, so that the air inlet 3413 is communicated with the exhaust channel 344, and the air outlet 3411 is communicated with the second display mechanism 35, so that the detection air leaked from the needle tube in the accommodating cavity enters the second display mechanism 35.
In addition, referring to fig. 9 and 10, in the embodiment of the present application, a baffle 36 is further provided, the baffle 36 is fixedly connected with the adjusting rod 343, an arc groove 37 is formed at the bottom of the detecting cylinder 34, an exhaust port 38 is formed inside the arc groove 37, and the exhaust port 38 is communicated with the accommodating cavity; the baffle 36 is provided with an exhaust head 361 and a blocking head 362 towards one side of the arc-shaped groove 37, in an initial state, the exhaust head 361 is communicated with the exhaust port 38, when the piston 31 just stretches into the object 50 to be detected and does not reach the first state yet, the object 50 to be detected and the gas in the accommodating cavity are pumped out through the exhaust head 361 and the exhaust port 38, the object 50 to be detected and the accommodating cavity are kept in a vacuum state, when the piston 31 reaches the first state, the adjusting rod 343 rotates to drive the baffle 36 to rotate, the blocking head 362 is abutted against the exhaust port 38, the exhaust port 38 is closed, the vacuum state of the object 50 to be detected and the accommodating cavity is kept, and the accuracy of tightness detection is improved.
Referring to fig. 11, in the embodiment of the present application, the second display mechanism 35 includes a mounting seat 351 fixedly mounted on the detection cylinder 34, a lampshade 352 and a lamp cap 353, a driving cavity is disposed at the tail of the lampshade 352, a first electrode 354 is fixedly mounted in the driving cavity, a second electrode 356 is slidably mounted in the driving cavity, the first electrode 354 and the second electrode 356 are connected through a fourth spring 355, the first electrode 354 and the second electrode 356 are electrically connected with the lamp cap 353, a gas inlet is formed on the mounting seat 351, after the movement of the guide tube 341, an air outlet 3411 is communicated with the gas inlet, so that the detection gas enters the driving cavity to drive the second electrode 356 to slide towards the first electrode 354, and when the second electrode 356 contacts the first electrode 354, a power circuit of the lamp cap 353 is conducted, and the lamp cap 353 emits a signal to display light, which is the first display signal.
Referring again to fig. 1-3, in an embodiment of the present application,
the rotating mechanism comprises a gear box 21, a first motor 22 and a rotating shaft 23, the gear box 21 is mounted on the bottom plate 10, the first motor 22 is mounted on the gear box 21, the first motor 22 is in transmission connection with the rotating shaft 23 through the gear box 21, the rotating shaft 23 is fixedly connected with the turntable 24 so as to drive the turntable 24 to rotate, the detecting cylinder 34 is aligned with the piston 31, after the detection of the object 50 to be detected in one of the detecting cylinders 34 is completed, the detecting cylinder 34 with the next object 50 to be detected is aligned with the piston 31, and as for the loading and unloading of the object 50 to be detected, a manipulator in the prior art can be adopted, and the embodiment is not repeated here.
In addition, in the embodiment of the present application, a first air pump 25 is further installed on the rotating shaft 23, and the first air pump 25 is communicated with the air discharging head 361 through an air pipe 26, so as to vacuumize the accommodating cavity and the interior of the object 50 to be tested before the air tightness detection.
In the embodiment of the present application, the lifting adjustment mechanism includes a frame 41, a lifting screw 45 rotatably mounted on the frame 41, and a lifting screw sleeve 46 slidably mounted on the frame 41, where the lifting screw 45 is in threaded connection with the lifting screw sleeve 46, and the lifting screw sleeve 46 is connected with a telescopic member 44 through a lifting seat 43, so as to control the height of the telescopic member 44, and in this embodiment, the telescopic member 44 is an air cylinder, an electric push rod or a hydraulic rod;
further, a driving motor 42 is further mounted on the frame 41, and the driving motor 42 is in transmission connection with the lifting screw 45 through a bevel gear set, and is used for driving the lifting screw 45 to rotate.
The application also discloses a method for detecting the sealing performance of the needle sleeve of the injector, which comprises the following steps:
step one, adjusting the rotation of the turntable 24 to enable a detection cylinder 34 provided with an object 50 to be detected on the turntable 24 to be aligned with a piston 31 at the telescopic end of a telescopic piece 44;
step two, controlling the extension end of the extension piece 44 to extend, driving the piston 31 to insert into the needle tube with the needle, starting the first air pump 25, and vacuumizing the accommodating cavity of the detection cylinder 34 and the interior of the needle tube;
step three, continuously controlling the extension of the extension end of the extension piece 44, driving the piston 31 to reach the first state, releasing the detection gas into the needle tube by the second air pump 317, waiting for a period of time, and observing whether the second display mechanism 35 sends out the first display signal;
step four, when the second display mechanism 35 sends out the first display signal, the detection is completed, and the detection result is that the joint of the needle tube and the needle head is leaked; when the second display mechanism 35 does not send out the first display signal, the extension of the extension end of the extension piece 44 is continuously controlled, so that the connector 32 is contacted with the piston 31, whether the first display mechanism 321 sends out the second display signal is observed, when the first display mechanism 321 sends out the second display signal, the detection is completed, no leakage exists at the joint of the needle tube and the needle head as a detection result, and the sealing performance is good.
In summary, the tightness of the joint between the needle tube and the needle head is detected by the piston 31, the connector and the detecting tube, the piston 31 is driven to be inserted into the needle tube with the needle head in the detecting process, the first air pump 25 is started, the vacuum state is pumped into the accommodating cavity of the detecting tube and the interior of the needle tube, then the piston 31 is driven to reach the first state, the detecting gas is released into the interior of the needle tube through the second air pump 317, and whether the second display mechanism sends out the first display signal is observed; when the second display mechanism sends out the first display signal, the detection is completed, and the detection result is that the joint of the needle tube and the needle head is leaked; when the second display mechanism does not send out the first display signal, the expansion end of the expansion piece is controlled to extend continuously, the connector is contacted with the piston 31, whether the first display mechanism sends out the second display signal or not is observed, when the first display mechanism sends out the second display signal, detection is completed, the joint of the needle tube and the needle head does not leak, the tightness is good, accordingly, the tightness of the joint of the needle tube and the needle head can be detected rapidly and effectively, the obtained detection result is easy to observe, and the phenomena of false detection and missing detection are avoided.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The needle tube sealing performance detection device of the injector is characterized by comprising a bottom plate (10), a turntable mechanism (20), a detection mechanism (30) and a lifting mechanism (40), wherein the detection mechanism (30) comprises a piston (31), a connector (32) and a detection cylinder (34), the connector (32) is in sliding connection with the piston (31), an elastic piece is arranged between the connector (32) and the piston (31), and a containing cavity for containing an object (50) to be detected is formed in the detection cylinder (34);
the turntable mechanism (20) comprises a turntable (24) and a rotating mechanism for controlling the turntable (24) to rotate, and at least one placing groove for accommodating the detection cylinder (34) is formed in the turntable (24);
the lifting mechanism (40) comprises a lifting adjusting mechanism and a telescopic piece (44), the connector (32) is connected with the telescopic end of the telescopic piece (44), and the telescopic end of the telescopic piece (44) stretches to control the piston (31) to be inserted into the object (50) to be tested;
the outer side of the piston (31) is slidably provided with a sliding seat (33), an air inlet mechanism for introducing detection gas into the object (50) to be detected is arranged in the piston (31), a first switch for controlling the opening of the air inlet mechanism is arranged at the joint of the piston (31) and the sliding seat (33), and the first switch controls the opening of the air inlet mechanism so as to introduce the detection gas into the object (50) to be detected;
the outer side of the detection cylinder (34) is provided with a second display mechanism (35), the second display mechanism (35) is communicated with the accommodating cavity, when a leakage point exists at the joint of the needle tube and the needle head, detection gas enters the second display mechanism (35) from the accommodating cavity, the second display mechanism (35) contacts the detection gas and then sends out a first display signal, and the first display signal indicates that the joint of the needle tube and the needle head has leakage;
install first display mechanism (321) on connector (32), the junction of connector (32) and piston (31) is provided with the control first display mechanism (321) open second switch, and second switch control first display mechanism (321) start to send the second display signal, the second display signal is good with the leakproofness that indicates needle tubing and syringe needle junction.
2. The device for detecting the sealing performance of a needle tube of an injector according to claim 1, wherein the first switch comprises a first sliding block (312) and a second sliding block (314), a plurality of sliding grooves are formed in the periphery of the piston (31), the first sliding block (312) and the second sliding block (314) are slidably arranged in the sliding grooves, and the first sliding block (312) is connected with the sliding grooves through a first spring (313); the sliding seat (33) is provided with a socket towards one side of the piston (31), and the second sliding block (314) stretches into the socket.
3. The device for detecting the sealing performance of a needle tube of an injector according to claim 2, wherein the air inlet mechanism comprises a power supply (316) and a second air pump (317) which are installed inside the piston (31), the power supply (316) is electrically connected with the second air pump (317), electrode plates are installed on opposite sides of the first sliding block (312) and the second sliding block (314), and the power supply (316) is further electrically connected with the electrode plates through a lead (315).
4. A device for detecting the sealing performance of a needle tube of an injector according to claim 3, wherein an air outlet is arranged at the bottom of the piston (31), the air outlet is communicated with the air outlet at the air exhaust end of the second air pump (317), and a one-way valve (318) is arranged on the air outlet; the piston (31) is also provided with an air inlet pipe for supplying air to the second air pump (317).
5. The device for detecting the sealing performance of the needle tube of the injector according to claim 1, wherein an elastic piece arranged between the connector (32) and the piston (31) is a second spring (322), a stand column (311) is arranged on one side of the piston (31) facing the connector (32), a slot for sliding the stand column (311) is arranged in the connector (32), and the stand column (311) is connected with the slot through the second spring (322); the second switch is a first electrode plate arranged at the top of the piston and a second electrode plate arranged at the bottom of the connector (32), and the first electrode plate and the second electrode plate are electrically connected with the first display mechanism (321).
6. The device for detecting the sealing performance of the needle tube of the injector according to claim 1, wherein two open slots are symmetrically formed on the left side and the right side of the detection cylinder (34), a flow guide pipe (341) is slidably arranged in the open slot on the same side as the second display mechanism (35), the flow guide pipe (341) is connected with the bottom of the open slot through a third spring (342), an adjusting rod (343) is rotatably arranged in the open slot on the other side, and a threaded section is arranged on the upper part of the adjusting rod (343); the left side and the right side of the sliding seat (33) are symmetrically provided with a first push plate (331) and a second push plate (332), the shapes of the first push plate (331) and the second push plate (332) are matched with the open slot, and the bottom of the second push plate (332) is fixedly provided with a screw sleeve (3321).
7. The device for detecting the sealing performance of the needle tube of the injector according to claim 6, wherein the air cavity (3412) is formed in the guide tube (341), the air outlet hole (3411) is formed in one side of the guide tube (341), the air inlet hole (3413) is formed in the other side of the guide tube (341), the air outlet hole (3411) is located above the air inlet hole (3413), the air exhaust channel (344) is formed in the piston (31), one end of the air exhaust channel (344) is communicated with the accommodating cavity, and the other end of the air exhaust channel (344) is communicated with the opening groove provided with the guide tube (341).
8. The device for detecting the sealing performance of the needle tube of the injector according to claim 7, further comprising a baffle plate (36), wherein the baffle plate (36) is fixedly connected with the adjusting rod (343), an arc-shaped groove (37) is formed in the bottom of the detecting cylinder (34), an exhaust port (38) is formed in the arc-shaped groove (37), and the exhaust port (38) is communicated with the accommodating cavity; an exhaust head (361) and a plugging head (362) are arranged on one side of the baffle plate (36) facing the arc-shaped groove (37).
9. The device for detecting the sealing performance of the needle tube of the injector according to claim 1, wherein the second display mechanism (35) comprises a mounting seat (351) fixedly installed on the detecting cylinder (34), a lamp shade (352) and a lamp cap (353), a driving cavity is arranged at the tail of the lamp shade (352), a first electrode (354) is fixedly installed in the driving cavity, a second electrode (356) is further installed in the driving cavity in a sliding mode, the first electrode (354) and the second electrode (356) are connected through a fourth spring (355), the first electrode (354) and the second electrode (356) are electrically connected with the lamp cap (353), and a gas inlet is formed in the mounting seat (351).
10. A method of detecting a needle sealing performance detecting apparatus of an injector according to any one of claims 1 to 9, comprising the steps of:
step one, adjusting the rotation of a rotary table (24) to enable a detection cylinder (34) provided with an object (50) to be detected on the rotary table (24) to be aligned with a piston (31) at the telescopic end of a telescopic piece (44);
controlling the extension of the extension end of the extension piece (44), driving the piston (31) to be inserted into the needle tube with the needle head, and vacuumizing the accommodating cavity of the detection cylinder (34) and the interior of the needle tube;
step three, continuously controlling the extension of the extension end of the extension piece (44), driving the piston (31) to reach a first state, releasing detection gas into the needle tube, and observing whether the second display mechanism (35) sends out a first display signal after waiting for a period of time;
step four, when the second display mechanism (35) sends out the first display signal, detection is completed, and the detection result is that the joint of the needle tube and the needle head is leaked; when the second display mechanism (35) does not send out the first display signal, the extension of the extension end of the extension piece (44) is continuously controlled, the connector (32) is in contact with the piston (31), whether the first display mechanism (321) sends out the second display signal is observed, when the first display mechanism (321) sends out the second display signal, the detection is completed, the detection result is that no leakage exists at the joint of the needle tube and the needle head, and the tightness is good.
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| CN202311302321.2A CN117054006B (en) | 2023-10-10 | 2023-10-10 | Device and method for detecting sealing performance of needle tube of injector |
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