CN115077813A - Endoscope insertion part leakage detection device and method - Google Patents

Endoscope insertion part leakage detection device and method Download PDF

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Publication number
CN115077813A
CN115077813A CN202210785378.1A CN202210785378A CN115077813A CN 115077813 A CN115077813 A CN 115077813A CN 202210785378 A CN202210785378 A CN 202210785378A CN 115077813 A CN115077813 A CN 115077813A
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CN
China
Prior art keywords
endoscope insertion
sealing
test
insertion portion
test chamber
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CN202210785378.1A
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Chinese (zh)
Inventor
肖举林
吴燕
王立强
王润程
杨青
徐鸿博
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Zhejiang University ZJU
Zhejiang Lab
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Zhejiang University ZJU
Zhejiang Lab
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Application filed by Zhejiang University ZJU, Zhejiang Lab filed Critical Zhejiang University ZJU
Priority to CN202210785378.1A priority Critical patent/CN115077813A/en
Publication of CN115077813A publication Critical patent/CN115077813A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Endoscopes (AREA)

Abstract

The invention discloses a device and a method for detecting leakage of an endoscope insertion part. Comprises a test cavity for accommodating the part to be tested of the insertion part; a sealing joint connecting the insertion part and the test chamber; an air pump that applies negative and positive pressures to the test chamber; a pressure sensor for detecting the pressure in the test chamber when the negative pressure and the positive pressure are applied; and a control unit that controls driving of the air pump. According to the invention, before the complete machine is assembled, the leakage detection can be carried out on the insertion part independently, so that the problem that the endoscope insertion part with the leakage problem flows into the complete machine assembly link is effectively avoided, the leakage qualification rate and the assembly yield of the complete machine are improved, the complete machine repair and scrap caused by the leakage of the insertion part are effectively avoided, and the production and manufacturing cost of the endoscope is reduced.

Description

Endoscope insertion part leakage detection device and method
Technical Field
The invention relates to the technical field of endoscope reliability detection, in particular to a device and a method for detecting endoscope insertion part leakage.
Background
Endoscopes, as common auxiliary diagnostic equipment in modern medical treatment, are often used for early diagnosis and surgical treatment of organ diseases such as gastrointestinal tract in vivo. In diagnosis, the insertion portion at the tip end of the endoscope needs to be inserted into the body of a patient, and the body of the patient is in a humid environment, so that the insertion portion of the endoscope needs to have a good waterproof function to prevent liquid or vapor in the body of the patient from entering the insertion portion and affecting functions such as endoscopic imaging during diagnosis.
Since the endoscope as a whole is in a state where its interior is communicated with each other from the insertion portion to the operation portion and further to the light guide portion, a general detection method in detecting water leakage from the endoscope is: and after the endoscope is completely assembled, the whole endoscope is placed in the leakage detection device for leakage detection. The disadvantages of this method are: if one part of the endoscope leaks, the whole endoscope needs to be disassembled and then the leaking part needs to be repaired, and many positions of the endoscope are fixed by glue in an auxiliary way during assembly, so that the disassembly process is very difficult, and some parts can be damaged and scrapped.
Therefore, in view of the above circumstances, the present invention provides a device and a method for individually detecting the leakage of an insertion portion in an early stage of assembly, and aims to place the leakage detection of the insertion portion before the assembly of a complete machine, thereby effectively preventing the insertion portion with the leakage problem from flowing into the assembly link of the complete machine, effectively improving the leakage qualification rate and the assembly yield of the complete machine, and effectively preventing the repair and the scrap of the complete machine caused by the leakage of the insertion portion, thereby reducing the production cost of the endoscope.
Disclosure of Invention
The invention aims to provide a device and a method for detecting leakage of an endoscope insertion part, which overcome the defects of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses a leakage detection device for an endoscope insertion part, which comprises a test cavity, an air pump and a control part, wherein the test cavity is provided with a test hole; the test cavity is used for fixing and accommodating an endoscope insertion part to be tested; one end of the control part is connected with the air pump, and the other end of the control part is connected with the test cavity; the endoscope testing device is characterized in that a pressure sensor used for detecting the pressure in the testing cavity is arranged in the control part, and a sealing joint is arranged between the endoscope inserting part and the testing cavity.
Preferably, one end of the control part is connected with the air pump through a first air hose, and the other end of the control part is connected with the test cavity through a second air hose; the first gas transmission hose and the second gas transmission hose are both hollow hoses; the pressure sensor monitors the pressure in the first gas transmission hose and the second gas transmission hose.
Preferably, an alarm is arranged in the control part, and the input end of the alarm is connected with the detection signal output end of the pressure sensor.
Preferably, the test cavity consists of a test cavity upper cover, a test cavity main body and a test cavity sealing ring; the upper portion of test chamber main part is equipped with the test chamber upper cover, the lower terminal surface of test chamber upper cover is equipped with circular recess, the test chamber sealing washer imbed in the circular recess.
Preferably, the test cavity upper cover is provided with at least two round holes, one of the round holes is provided with a hose sealing joint, and the other round holes are provided with sealing joints for hermetically connecting the endoscope insertion part to be tested with the test cavity upper cover.
Preferably, the sealing joint comprises a locking nut, an elastic main body, compression silica gel, a sealing joint main body, a joint sealing ring and a joint fixing nut; the sealing joint main part is a hollow double-screw bolt, the surface of sealing joint main part is equipped with sealed boss, the both ends of sealed boss are first thread end and second thread end respectively, compress tightly the inner wall of silica gel setting at first thread end, the elasticity main part cover is established in the clearance that compresses tightly silica gel and first thread end inner wall, lock nut's inner circle is equipped with the screw thread for fix with first thread end locking.
Preferably, a sealing groove is formed in the second threaded end, the joint sealing ring is installed in the sealing groove, and the second threaded end penetrates through a circular hole in the upper cover of the test cavity and then is in threaded connection with the joint fixing nut.
Preferably, an arc-shaped pressing surface is arranged on the inner ring of the lock nut; the elastic body is provided with an elastic claw.
The application also discloses an endoscope insertion part leakage detection method, which uses the endoscope insertion part leakage detection device and specifically comprises the following steps:
s1, mounting and fixing the endoscope insertion part to be tested on the testing cavity;
s2, driving an air pump to apply negative pressure to the test cavity for a specified time;
s3, detecting the internal pressure of the test cavity through a pressure sensor;
s4, the control part reads the detection signal input by the pressure sensor, and if the detection signal is a constant pressure, no leakage exists; if the signal is not a constant pressure; the endoscope insertion portion to be tested has a leak point.
Preferably, step S1 is preceded by a self-test of the leak detection device, which specifically includes the following operations: the top of the sealing joint is blocked by a sealing plug with the fitting size, and the rest round holes on the upper cover of the testing cavity are blocked by the sealing plug with the fitting size; driving an air pump to apply negative pressure on the test cavity for a specified time; detecting the pressure in the test cavity through a pressure sensor; if the control part reads the detection signal input by the pressure sensor, if the detection signal is constant pressure, no leakage exists; if the detection signal is not a constant pressure; the leak detection device to be tested has a leak point.
The invention has the beneficial effects that:
the device and the method for detecting the leakage of the insertion part of the endoscope realize the leakage detection of the insertion part before the assembly of the whole endoscope, avoid the insertion part with the leakage problem from flowing into the assembly link of the whole endoscope, effectively improve the assembly yield of the whole endoscope and reduce the production and manufacturing cost of the endoscope.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of the internal structure of an endoscope insertion section and a leak detection apparatus;
FIG. 2 is an overall view of the endoscope insertion portion leakage detection device;
FIG. 3 is a perspective view of the state in which the endoscope insertion portion is connected to the seal interface;
FIG. 4 is a cross-sectional view of a test chamber of the leak detection apparatus;
FIG. 5 is a sectional view showing a state where the endoscope insertion portion is connected to the seal interface;
FIG. 6 is a cross-sectional view of the locked state of the endoscope insertion portion and the sealing interface;
FIG. 7 is an exploded view of the structure of the sealing interface;
wherein, 100-endoscope insertion part, 110-insertion part head end; 200-a sealing joint, 210-a lock nut, 211-an arc-shaped pressing surface, 220-an elastic body, 221-an elastic claw, 230-pressing silica gel, 240-a sealing joint body, 241-a first threaded end, 242-a second threaded end, 243-a sealing boss, 244-a sealing groove, 250-a joint sealing ring and 260-a joint fixing nut; 300-endoscope insertion part leakage detection device, 310-pressure sensor, 320-test cavity, 321-test cavity upper cover, 322-test cavity main body, 323-first air conveying hose, 324-hose sealing joint, 325-test cavity sealing ring, 330-air pump, 331-second air conveying hose, 340-control part and 350-alarm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
First, the endoscope insertion portion leakage detection device of the present embodiment will be explained below:
as shown in fig. 1 and 2, the endoscope insertion portion leakage detecting device 300 includes a test chamber 320, an air pump 330, and a control portion 340. The test chamber 320 is used to secure and receive an endoscope insertion portion 100 to be tested. The air pump 330 and the controller 340 are connected by a second air hose 331, and the second air hose 331 is a hollow hose. The control unit 340 is connected to the test chamber 320 via a first air hose 323, and the first air hose 323 is a hollow hose. A pressure sensor 310 is provided in the control part 340 for monitoring the pressure in the first and second air hoses 323 and 331 when the air pump 330 applies negative and positive pressures to the test chamber 320. Since the first and second air hoses 323 and 331 communicate the air pump 330 with the inner cavity of the test chamber 320, the pressure actually monitored by the pressure sensor 310 is the pressure in the test chamber 320. The alarm 350 is provided in the control unit 340, and the alarm 350 is used to give an alarm when the pressure value in the test chamber 320 is abnormal, and the alarm may be given by an alarm sound, an alarm lamp, a character alarm on the display of the control unit, or the like.
As shown in fig. 3 and 4, test chamber 320 is comprised of a test chamber upper cover 321, a test chamber body 322, and a test chamber seal 325. The lower end surface of the test chamber upper cover 321 is provided with a circle of circular groove, and the test chamber sealing ring 325 is embedded in the circular groove. When the test chamber upper cover 321 is fastened to the test chamber main body 322, one end of the test chamber sealing ring 325 exposed out of the circular groove is attached to the upper end surface of the test chamber main body 322. When the cavity of the test chamber 320 is under negative pressure, the atmospheric pressure in the environment pressurizes the test chamber 320, so that the seal ring 325 of the test chamber is compressed, and the upper cover 321 of the test chamber is tightly pressed against the main body 322 of the test chamber, thereby sealing the test chamber 320.
As shown in fig. 3 and 4, at least two circular hole structures are disposed on the test chamber upper cover 321. The first circular hole is provided with a hose sealing joint 324, and the hose sealing joint 324 is used for connecting the test chamber upper cover 321 and the first air hose 323 in a sealing manner. The second circular hole is provided with a sealing joint 200, and the sealing joint 200 is used for sealing and connecting the endoscope insertion part 100 to be tested and the test cavity upper cover 321. The number of the second circular holes may be plural, depending on the number of the endoscope insertion portions 100 to be tested at the same time, and when the number of the endoscope insertion portions 100 to be tested at the same time is smaller than the number of the second circular holes, the redundant second circular holes may be blocked by the sealing plugs.
As shown in fig. 5, 6 and 7, the sealing joint 200 includes a lock nut 210, an elastic body 220, a compression silicone 230, a sealing joint body 240, a joint packing 250, and a joint fixing nut 260.
The sealing joint main body 240 is a hollow stud, a circle of sealing groove 244 is formed in the root of the second threaded end 242 and used for containing a joint sealing ring 250, the second threaded end 242 penetrates through a second round hole in the testing cavity upper cover 321 and then is in threaded connection and locking with the joint fixing nut 260, the sealing boss 243 in the sealing joint main body 240 is abutted to the end face of the testing cavity upper cover 321, the joint sealing ring 250 is compressed, and sealing between the testing cavity upper cover 321 and the sealing joint main body 240 is achieved.
The compression silica gel 230 is arranged on the inner wall of the first threaded end 241 of the sealing joint main body 240, and the elastic main body 220 is sleeved in the gap between the compression silica gel 230 and the inner wall of the first threaded end 241. The inner ring of the lock nut 210 is provided with a thread for locking fixation with the first threaded end 241. The inner ring of the lock nut 210 is provided with an arc-shaped pressing surface 211, the elastic body 220 is generally made of plastic material, and a circle of elastic claw 221 is arranged on the elastic body, when the lock nut 210 is screwed with the first thread end 241, the arc-shaped pressing surface 211 applies pressure to the elastic claw 221, so that the elastic claw 221 bends towards the axial side, the compression silica gel 230 is squeezed, the size of the inner wall of the compression silica gel 230 is reduced, and the compression is pressed with the endoscope insertion part 100 penetrating through the sealing joint 200, and the sealing between the sealing joint 200 and the endoscope insertion part 100 is realized.
The endoscope insertion portion leakage detection method of the present embodiment is explained below:
the method comprises the following steps: the top of the sealing joint 200 is plugged with a properly sized sealing plug, while the remaining second circular hole in the test chamber upper cover 321 is plugged with a properly sized sealing plug. Pressing the start button powers up the leak detection apparatus 300. The control unit 340 controls the air pump 330 to apply negative pressure to the test chamber 320 via the second air tube 331 and the first air tube 323, and the test chamber upper lid 321 abuts against the test chamber main body 322 by the suction of air, so that the test chamber seal 325 is pressed between the test chamber upper lid 321 and the test chamber main body 322. Meanwhile, through the suction of air, the stepped surface of the sealing plug on the second circular hole is also abutted to the upper cover 321 of the test chamber, and the stepped surface of the sealing plug on the sealing joint 200 is abutted to the upper end face of the lock nut 210. The above-described negative pressure operation is performed for a prescribed time, and if the pressure sensor 310 shows a constant negative pressure, the leak detection apparatus 300 is certified to be airtight and free of leaks. On the other hand, if the above-mentioned negative pressure operation is performed for a predetermined time, and the pressure sensor 310 indicates a non-constant negative pressure, the alarm 350 will issue an alarm, which indicates that there is a leakage point in the leakage detection apparatus 300, and the leakage detection apparatus 300 needs to be maintained until the negative pressure test is passed, and then the operation can not be used for detecting the endoscope leakage. After the self-test of the leak detector 300 is completed, the off button is pressed to turn off the power supply of the leak detector 300.
Step two: the sealing plug at the top of the sealing joint 200 is removed and the lock nut 210 is unscrewed. An endoscope insertion portion 100 to be tested is taken, the endoscope insertion portion 100 is inserted into the sealing joint 200, and the insertion portion head end 110 needing to be tested for leakage is ensured to completely enter the testing cavity 320. And then the locking nut 210 is screwed to fix the endoscope insertion part 100 to be detected, after locking, the endoscope insertion part 100 is pulled outwards, and the endoscope insertion part 100 is locked in place without loosening.
Step three: pressing the start button powers up the leak detection apparatus 300. The operation control unit 340 controls the air pump 330 to apply a negative pressure to the test chamber 320 via the second air tube 331 and the first air tube 323, and performs the negative pressure operation for a predetermined time, and if the pressure sensor 310 indicates a constant negative pressure, the tested endoscope insertion portion 100 is proved to be air-tight and qualified and to have no leak. On the other hand, if the pressure sensor 310 does not indicate a constant negative pressure and the alarm 350 gives an alarm after the above-described negative pressure operation is performed for a predetermined time, it indicates that there is a leak at the tip 110 of the endoscope insertion portion 100 under test and that the insertion portion tip 100 needs to be repaired.
Step four: the operation control unit 340 controls the air pump 330 to apply positive pressure to the test chamber 320 through the second air hose 331 and the first air hose 323, and performs the positive pressure operation for a certain period of time, until the pressure sensor 310 indicates that the pressure value in the test chamber 320 is equal to the atmospheric pressure, the control unit 340 controls the air pump 330 to stop the pressurizing operation. At this time, the pressure values inside and outside the test chamber 320 are equal, the air suction disappears, and the abutment between the test chamber upper cover 321 and the test chamber main body 322 fails. After this operation is completed, the off button is pressed to turn off the power supply of the leak detection apparatus 300.
Step five: the lock nut 210 is unscrewed, and the tested endoscope insertion portion 100 is taken out, completing the one-time leak detection of the endoscope insertion portion.
According to the method and the device for detecting the leakage of the insertion part of the endoscope, the insertion part can be independently detected before the complete machine is assembled, the problem that the insertion part of the endoscope with the leakage problem flows into the complete machine assembly link is effectively avoided, the leakage qualification rate and the assembly yield of the complete machine can be effectively improved, the complete machine repair and scrap caused by the leakage of the insertion part are effectively avoided, and the production and manufacturing cost of the endoscope is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. An endoscope insertion portion leakage detection device characterized in that: comprises a test chamber (320), an air pump (330) and a control part (340); the test chamber (320) is used for fixing and accommodating an endoscope insertion part (100) to be tested; one end of the control part (340) is connected with the air pump (330), and the other end of the control part (340) is connected with the test cavity (320); a pressure sensor (310) for detecting the pressure in the test cavity (320) is arranged in the control part (340), and a sealing joint (200) is arranged between the endoscope insertion part (100) and the test cavity (320).
2. An endoscope insertion portion leakage detecting device according to claim 1, characterized in that: one end of the control part (340) is connected with the air pump (330) through a first air hose (323), and the other end of the control part (340) is connected with the test cavity (320) through a second air hose (331); the first air hose (323) and the second air hose (331) are both hollow hoses; the pressure sensor (310) monitors the pressure in the first gas hose (323) and the second gas hose (331).
3. An endoscope insertion portion leakage detecting device according to claim 1, characterized in that: an alarm (350) is arranged in the control part (340), and the input end of the alarm (350) is connected with the detection signal output end of the pressure sensor (310).
4. An endoscope insertion portion leakage detecting device according to claim 1, characterized in that: the test cavity (320) consists of a test cavity upper cover (321), a test cavity main body (322) and a test cavity sealing ring (325); the upper portion of test chamber main part (322) is equipped with test chamber upper cover (321), the lower terminal surface of test chamber upper cover (321) is equipped with circular recess, test chamber sealing washer (325) imbed in the circular recess.
5. An endoscope insertion portion leakage detecting device according to claim 4, characterized in that: the test cavity upper cover (321) is provided with at least two round holes, one of the round holes is provided with a hose sealing joint (324), and the other round holes are provided with sealing joints (200) for hermetically connecting the endoscope insertion part (100) to be tested with the test cavity upper cover (321).
6. An endoscope insertion portion leakage detecting device according to claim 5, characterized in that: the sealing joint (200) comprises a locking nut (210), an elastic main body (220), compression silica gel (230), a sealing joint main body (240), a joint sealing ring (250) and a joint fixing nut (260); sealing joint main part (240) is a hollow double-screw bolt, the surface of sealing joint main part (240) is equipped with sealed boss (243), the both ends of sealed boss (243) are first thread end (241) and second thread end (242) respectively, compress tightly silica gel (230) and set up the inner wall at first thread end (241), elasticity main part (220) cover is established in the clearance that compresses tightly silica gel (230) and first thread end (241) inner wall, the inner circle of lock nut (210) is equipped with the screw thread for it is fixed with first thread end (241) locking.
7. An endoscope insertion portion leakage detecting device according to claim 6, characterized in that: and a sealing groove (244) is formed in the second threaded end (242), the joint sealing ring (250) is installed in the sealing groove (244), and the second threaded end (242) penetrates through a circular hole of the test cavity upper cover (321) and then is in threaded connection with the joint fixing nut (260).
8. An endoscope insertion portion leakage detecting device according to claim 6, characterized in that: an arc-shaped pressing surface (211) is arranged on the inner ring of the lock nut (210); the elastic body (220) is provided with an elastic claw (221).
9. An endoscope insertion portion leakage detection method using the endoscope insertion portion leakage detection device according to any one of claims 1 to 8, comprising:
s1, the endoscope insertion part (100) to be tested is installed and fixed on the testing cavity (320);
s2, driving an air pump (330) to apply negative pressure to the test cavity (320) for a specified time;
s3, detecting the internal pressure of the test cavity (320) through the pressure sensor (310);
s4, the control part (340) reads the detection signal input by the pressure sensor (310), and if the detection signal is constant pressure, no leakage exists; if the signal is not a constant pressure; there are leaks in the endoscope insertion portion (100) to be tested.
10. The endoscope insertion portion leakage detection method according to claim 9, further comprising a self-test of the leakage detection device (300) before step S1, and the method comprises the following specific operations: the top of the sealing joint (200) is blocked by a sealing plug with the fitting size, and meanwhile, the rest round holes on the upper cover (321) of the testing cavity are blocked by the sealing plug with the fitting size; driving an air pump (330) to apply negative pressure to the test chamber (320) for a prescribed time; detecting the pressure inside the test chamber (320) by the pressure sensor (310); if the control part (340) reads the detection signal input by the pressure sensor (310), if the detection signal is a constant pressure, no leakage exists; if the detection signal is not a constant pressure; a leak point exists for the leak detection apparatus (300) to be tested.
CN202210785378.1A 2022-07-06 2022-07-06 Endoscope insertion part leakage detection device and method Pending CN115077813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210785378.1A CN115077813A (en) 2022-07-06 2022-07-06 Endoscope insertion part leakage detection device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210785378.1A CN115077813A (en) 2022-07-06 2022-07-06 Endoscope insertion part leakage detection device and method

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CN115077813A true CN115077813A (en) 2022-09-20

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202305129U (en) * 2011-10-26 2012-07-04 埃泰克汽车电子(芜湖)有限公司 Quick connector for air tightness test
CN203011654U (en) * 2012-11-29 2013-06-19 重庆气体压缩机厂有限责任公司 Clamp used for pressure test of heat exchange tube
CN105263388A (en) * 2014-03-11 2016-01-20 奥林巴斯株式会社 Endoscope leak test device
CN211178866U (en) * 2020-01-07 2020-08-04 重庆金山医疗技术研究院有限公司 Endoscope seals test joint assembly
CN212931825U (en) * 2020-09-30 2021-04-09 上海优益基医用材料有限公司 Scope device that leaks hunting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202305129U (en) * 2011-10-26 2012-07-04 埃泰克汽车电子(芜湖)有限公司 Quick connector for air tightness test
CN203011654U (en) * 2012-11-29 2013-06-19 重庆气体压缩机厂有限责任公司 Clamp used for pressure test of heat exchange tube
CN105263388A (en) * 2014-03-11 2016-01-20 奥林巴斯株式会社 Endoscope leak test device
CN211178866U (en) * 2020-01-07 2020-08-04 重庆金山医疗技术研究院有限公司 Endoscope seals test joint assembly
CN212931825U (en) * 2020-09-30 2021-04-09 上海优益基医用材料有限公司 Scope device that leaks hunting

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