Leak detection tool and sealing detection device

Abstract

The utility model relates to the technical field of endoscope, more particularly to a kind of leak detection tool and sealing detection device.The leak detection tool includes cylinder, air inlet pipe, lock catch and pressure relief valve, and the cylinder has chamber;And the peripheral wall of cylinder is provided with mounting hole;Air inlet pipe is connected with one end of cylinder;Air inlet pipe is provided with air inlet passage, and air inlet passage is communicated with cylinder;Lock catch is connected to the other end of cylinder, and it is used to lock or unlock the insertion part of endoscope;Pressure relief valve is installed in mounting hole, for adjusting the communication state between chamber and outside;Wherein, chamber is communicated with the cavity of insertion part.The leak detection tool can detect the sealing property of insertion part, and it is simple in structure, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of endoscope technology, and more specifically, to a leak detection fixture and a sealing detection device. Background Technology

[0002] Medical electronic endoscopes, as important auxiliary medical instruments, are widely used in various surgical procedures. Their structure typically consists of three parts: the main unit, the operating unit, and the insertion unit. The insertion unit, as the core component of the endoscope, integrates multiple precision components such as the tip, illumination unit, camera unit, curved serpentine tube, hollow insertion tube, and working channel tube.

[0003] The complexity and precision of these components necessitate that the insertion part ensure stable connections between components and a tight seal within the cavity during assembly. Therefore, the sealing performance of the insertion part needs to be tested before use. Utility Model Content

[0004] The purpose of this utility model is to provide a leak detection fixture and a sealing detection device, which can detect the sealing performance of the insertion part, and has a simple structure and is easy to use.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] Firstly, this utility model provides a leak detection fixture, comprising:

[0007] The cylindrical body has a cavity, and the peripheral wall of the cylindrical body is provided with mounting holes;

[0008] An air inlet pipe is connected to one end of the cylinder; the air inlet pipe is equipped with an air inlet channel, which is connected to the cylinder.

[0009] The latch is connected to the other end of the tube and is used to lock or unlock the insertion part of the endoscope.

[0010] Pressure relief valve, installed in the mounting hole, is used to regulate the connection between the chamber and the outside.

[0011] The chamber is connected to the cavity of the insertion part.

[0012] In an optional embodiment, the pressure relief valve includes a resilient pressing element, a valve core, and a valve seat. The resilient pressing element is sleeved on the valve core and connected to the valve seat. The valve core is movably sleeved on the valve seat and has at least a first position and a second position. The valve seat is mounted in a mounting hole.

[0013] The valve core is provided with a vent groove, and the valve seat is provided with a vent hole; when the valve core is in the first position, the chamber is connected to the outside through the vent groove and the vent hole; when the valve core is in the second position, the valve core blocks the chamber.

[0014] In an optional embodiment, the pressure relief valve further includes a seal, which is installed in the mounting hole and connected to the valve seat; the valve core is movably fitted onto the seal.

[0015] A sealing part is provided at one end of the valve core near the vent groove. When the valve core is in the second position, the sealing part is in contact with the seal.

[0016] In an optional embodiment, the leak testing fixture further includes a lower cover; the lower cover is provided with a mating hole for engaging with the insertion part; a latch is rotatably connected to the lower cover to lock or unlock the insertion part. In an optional embodiment, the latch is provided with an interconnected bent portion and a connecting portion; the connecting portion is rotatably connected to the lower cover; the bent portion is used to lock or unlock the insertion part.

[0017] In an optional embodiment, the leak testing fixture further includes an adjusting component connected to the lower cover; the connecting part is provided with a through hole, which is rotatably engaged with the adjusting component, and the adjusting component is used to adjust the distance between the latch and the bottom wall of the lower cover.

[0018] In an optional embodiment, the leak detection fixture also includes a mating sleeve;

[0019] The sleeve has a protrusion, and the lower cover has a groove; the protrusion and the groove are movably fitted together.

[0020] In an optional embodiment, the leak testing fixture further includes a sealing ring disposed between the mating surfaces of the lower cover and the mating sleeve.

[0021] Secondly, this utility model provides a sealing detection device, including an insertion part of an endoscope and the aforementioned leak detection fixture, wherein the tail end of the insertion part is connected to the leak detection fixture; the cavity of the insertion part is connected to the chamber and the air inlet channel.

[0022] In an optional embodiment, the sealing detection device further includes a fixed sleeve and a conical sheath; the fixed sleeve is connected to the tail end of the insertion part; the conical sheath is fitted onto the fixed sleeve and engages with the mating hole.

[0023] The beneficial effects of the leak detection fixture and seal detection device provided in this embodiment of the invention include:

[0024] This leak-testing fixture uses a locking mechanism to quickly secure the endoscope's insertion section to the fixture, thus connecting the cavity of the insertion section with the chamber of the cylindrical body. The adjustable mechanism allows for the installation of various insertion section sizes. During testing, the insertion section is placed in water, and gas is introduced into the air inlet channel of the air inlet pipe, allowing the gas to flow sequentially through the chamber and the cavity. Operators can observe the location of air bubbles generated in the insertion section to determine its sealing performance and whether there are any leaks. Furthermore, this embodiment includes a pressure relief valve. After testing, before removing the insertion section, the pressure is released through the valve to connect the chamber to the outside, balancing the pressure in the chamber and preventing damage to the leak-testing fixture and insertion section due to sudden pressure changes. This leak-testing fixture has a simple structure and is easy to operate, enabling rapid testing of the insertion section's sealing performance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the leak detection fixture provided in this embodiment;

[0027] Figure 2 This is a schematic diagram of the sealing detection device provided in this embodiment;

[0028] Figure 3 This is a cross-sectional schematic diagram of the leak detection fixture provided in this embodiment;

[0029] Figure 4 This is a cross-sectional schematic diagram of the pressure relief valve provided in this embodiment;

[0030] Figure 5 This is a structural schematic diagram of the latch, lower cover, and adjusting component provided in this embodiment;

[0031] Figure 6 This is a cross-sectional view of the lower cover provided in this embodiment;

[0032] Figure 7 This is a schematic diagram of the latch structure provided in this embodiment;

[0033] Figure 8 This is a cross-sectional schematic diagram of the mating sleeve and sealing ring provided in this embodiment;

[0034] Figure 9 This is a cross-sectional schematic diagram of the lower cover, fixing sleeve, and conical sheath provided in this embodiment;

[0035] Figure 10 This is a schematic diagram of the conical sheath provided in this embodiment.

[0036] Icons: 100-Leak testing fixture; 110-Cylinder; 111-Cavity; 112-Mounting hole; 120-Inlet pipe; 121-Inlet channel; 130-Lock; 131-Bend; 132-Connection; 133-Through hole; 140-Pressure relief valve; 141-Elastic pressing element; 142-Valve core; 1421-Ventilation groove; 1422-Sealing part; 143-Valve seat; 1431-Ventilation hole; 144-Sealing element; 150-Lower cover; 151-Slide groove; 152-Matching hole; 160-Adjusting element; 170-Matching sleeve; 171-Protrusion; 172-Annular groove; 180-Sealing ring; 190-Upper cover; 200-Sealing detection device; 210-Insertion part; 220-Fixing sleeve; 221-Groove; 230-Conical sheath. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0043] Please refer to Figures 1-3 This embodiment provides a leak testing fixture 100, which includes a cylinder 110, an air inlet pipe 120, a latch 130, and a pressure relief valve 140. The air inlet pipe 120 and the latch 130 are respectively connected to the two ends of the cylinder 110. The cylinder 110 has a chamber 111, and the air inlet pipe 120 is provided with an air inlet channel 121. The chamber 111 is connected to the air inlet channel 121, so that gas can enter the chamber 111 from the air inlet channel 121. The latch 130 is used to lock or unlock the insertion part 210 of the endoscope.

[0044] This utility model also provides a sealing detection device 200, including the aforementioned leak detection fixture 100 and an endoscope insertion portion 210. The tail end of the endoscope insertion portion 210 cooperates with a locking buckle 130. When the locking buckle 130 abuts against the tail end of the insertion portion 210, the tail end of the insertion portion 210 is locked. At this time, the cavity of the insertion portion 210 communicates with the chamber 111, allowing gas in the chamber 111 to enter the cavity of the insertion portion 210.

[0045] When it is necessary to perform a sealing test on the insertion part 210 of the endoscope, the tail end of the insertion part 210 is locked with the latch 130, so that the air inlet channel 121, the chamber 111 and the cavity are connected. It should be noted that if the insertion part 210 is provided with a working channel with two ends connected, the working channel needs to be sealed with a plug or other inserts. Then, the insertion part 210 is placed in water, and air is introduced into the air inlet channel 121. By observing whether the insertion part 210 in the water produces bubbles, it can be determined whether the sealing of the insertion part 210 is qualified. The location where the insertion part 210 produces bubbles is the location of poor sealing.

[0046] After the sealing test is completed, since the pressure inside the chamber 111 is different from the external pressure, in order to avoid damage to the sealing test device 200 caused by the sudden change in pressure, the insertion part 210 is taken out of the water and the pressure relief valve 140 is used to make the pressure inside the chamber 111 the same as the external pressure before the insertion part 210 is removed from the leak test fixture 100.

[0047] Based on the above, this embodiment includes a pressure relief valve 140, and the cylinder 110 has a mounting hole 112, with the pressure relief valve 140 installed in the mounting hole 112. After the sealing test is completed, the pressure relief valve 140 is opened, thereby connecting the outside world with the chamber 111 and balancing the pressure between them.

[0048] Understandably, in this embodiment, the external environment and the chamber 111 can be connected or disconnected by opening or closing the pressure relief valve 140, that is, the connection state between the external environment and the chamber 111 can be adjusted.

[0049] Therefore, the leak testing fixture 100 provided in this embodiment can be connected to the insertion part 210 of the endoscope to test the sealing performance of the insertion part 210 of the endoscope, so as to determine whether the sealing performance of the insertion part 210 of the endoscope is qualified. This embodiment has a simple structure and is easy to operate, making it convenient for operators to quickly test the sealing performance of the insertion part 210.

[0050] Further, please refer to Figures 1-4 The pressure relief valve 140 includes an elastic pressing element 141, a valve core 142, a valve seat 143, and a sealing element 144; the elastic pressing element 141 and the sealing element 144 are respectively connected to both ends of the valve seat 143; the elastic pressing element 141 is sleeved on the valve core 142, and the valve core 142 is movably sleeved on the valve seat 143 and the sealing element 144; the sealing element 144 and the valve seat 143 are installed in the mounting hole 112.

[0051] It should be noted that, since the elastic pressing member 141 is elastic, it can extend and retract. By pressing the elastic pressing member 141, the valve core 142 can move relative to the valve seat 143 and the seal 144. Therefore, the valve core 142 has at least a first position and a second position.

[0052] The axes of the elastic pressing member 141, the valve seat 143, the seal 144, and the valve core 142 coincide. The extension / retraction direction of the elastic pressing member 141 is parallel to its axis. Therefore, the movement direction of the valve core 142 is parallel to the axis of the elastic pressing member 141. When the elastic pressing member 141 changes from its initial state to its contracted state under force, the valve core 142 moves towards the chamber 111, thus moving to the first position. After the elastic pressing member 141 is released, it rebounds, changing from its contracted state back to its initial state, and the valve core 142 moves away from the chamber 111, moving from the first position to the second position.

[0053] According to the above, the valve core 142 is provided with a vent groove 1421, and the valve seat 143 is provided with a vent hole 1431. When the valve core 142 is in the first position, the outside world and the chamber 111 can be connected through the vent groove 1421 and the vent hole 1431. The valve core 142 is also provided with a sealing part 1422. When the valve core 142 is in the second position, the sealing part 1422 is in contact with the sealing element 144, thereby disconnecting the outside world and the chamber 111. Thus, by moving the valve core 142, the communication state between the outside world and the chamber 111 can be changed.

[0054] It should be noted that the seal 144 in this embodiment is also elastic, so as to fit tightly against the inner wall of the mounting hole 112, thereby improving the sealing effect and thus improving the accuracy of detection.

[0055] Further, please refer to Figures 1-10 The sealing detection device 200 includes a fixing sleeve 220; the fixing sleeve 220 is connected to the tail end of the insertion part 210. The leak detection fixture 100 in this embodiment also includes a lower cover 150 and an adjusting member 160; the lower cover 150 is provided with a mating hole 152, which engages with the conical sheath 230, so that the conical sheath 230 is connected to the lower cover 150; one end of the adjusting member 160 is connected to the lower cover 150, and the other end is rotatably connected to the latch 130, so that the latch 130 can rotate around the axis of the adjusting member 160.

[0056] Specifically, at least a portion of the retaining sleeve 220 is located within the mating hole 152, and the peripheral wall of the retaining sleeve 220 abuts against the inner wall of the mating hole 152. The latch 130 rotates about the axis of the adjusting member 160 to move closer to or away from the retaining sleeve 220; when the latch 130 moves closer to the retaining sleeve 220 and engages with it, the latch 130 locks the retaining sleeve 220; when the latch 130 moves away from the retaining sleeve 220, the latch 130 and the retaining sleeve 220 separate, at which point the latch 130 unlocks the retaining sleeve 220.

[0057] Understandably, the tail end of the insertion part 210 is fitted onto the fixing sleeve 220, thereby enabling the fixed leak detection tool 100 to fix the insertion part 210.

[0058] Based on the above, please refer to... Figures 1-10 The peripheral wall of the fixing sleeve 220 is provided with a groove 221; the latch 130 is provided with a bent portion 131 and a connecting portion 132 that are connected to each other; the connecting portion 132 is provided with a through hole 133, which is rotatably engaged with the adjusting member 160, thereby allowing the connecting portion 132 and the adjusting member 160 to be rotatably connected. The axis of the through hole 133 coincides with the axis of the adjusting member 160, allowing the bent portion 131 and the connecting portion 132 to rotate around the axis of the adjusting member 160, thereby allowing the latch 130 to rotate relative to the lower cover 150, causing the bent portion 131 to move closer to or away from the fixing sleeve 220.

[0059] After the bent portion 131 approaches the fixing sleeve 220, the bent portion 131 enters the groove 221 and abuts against the inner wall of the groove 221, thereby locking the fixing sleeve 220 and preventing the fixing sleeve 220 from moving. After the bent portion 131 leaves the groove 221, the fixing sleeve 220 is unlocked.

[0060] In this embodiment, the adjusting member 160 is a bolt and a nut. The height of the latch 130 relative to the lower cover 150 can be adjusted by the threaded engagement of the bolt and nut, that is, the distance between the latch 130 and the bottom wall of the lower cover 150 can be adjusted.

[0061] Based on the above, please refer to... Figures 1-10 In this embodiment, the sealing detection device 200 also includes a conical sleeve 230, which is fitted onto the fixed sleeve 220 and engages with the mating hole 152.

[0062] It should be noted that, in this embodiment, the mating hole 152 is a tapered hole that matches the tapered sleeve 230, and the upper diameter of the mating hole 152 is larger than the lower diameter of the mating hole 152. After connecting the tapered sleeve 230, the fixing sleeve 220, and the insertion part 210 together, the tapered sleeve 230 and the fixing sleeve 220 are installed in the mating hole 152 from bottom to top, thereby installing the insertion part 210 on the lower cover 150.

[0063] Understandably, the tapered sleeve 230 is elastic, which allows it to fit tightly against the mating hole 152, thereby achieving a sealing effect, improving the sealing performance of the leak detection fixture 100, and thus improving the accuracy of the detection.

[0064] Furthermore, the leak detection fixture 100 also includes a mating sleeve 170 and a sealing ring 180. The mating sleeve 170 is fitted onto the cylinder 110. The outer wall of the mating sleeve 170 is provided with a protrusion 171 and an annular groove 172, and the inner side of the lower cover 150 is provided with a sliding groove 151. The protrusion 171 and the sliding groove 151 are movably fitted together. The sealing ring 180 is accommodated in the annular groove 172.

[0065] Specifically, after fixing the fixing sleeve 220, the conical sheath 230, and the insertion part 210 onto the lower cover 150 using the locking buckle 130, the lower cover 150 is fitted onto the mating sleeve 170. After aligning the protrusion 171 and the sliding groove 151, the lower cover 150 is rotated, causing the protrusion 171 to engage with the sliding groove 151, thus connecting the lower cover 150 and the mating sleeve 170 together. Simultaneously, a sealing ring 180 is installed in the annular groove 172, with the inner side of the lower cover 150 abutting against the sealing ring 180 to improve the sealing effect of the leak detection fixture 100, thereby increasing the accuracy of the detection. It should be noted that in this embodiment, the mating sleeve 170 and the cylinder 110 can be connected by adhesive, snap-fit, or screw connection.

[0066] In this embodiment, the leak detection fixture 100 also includes a top cover 190, which is connected to one end of the cylinder 110 to seal the cylinder 110. An air inlet pipe 120 is connected to the top cover 190, connecting the air inlet channel 121 and the chamber 111. A sealing sleeve is provided at the connection between the top cover 190 and the air inlet pipe 120 to improve the sealing effect of the leak detection fixture 100, thereby improving the accuracy of the detection.

[0067] In this embodiment, the mating sleeve 170 is disposed on the outer side of one end of the cylinder 110; in other embodiments, the mating sleeve 170 may also be disposed on the inner side of one end of the cylinder 110.

[0068] Furthermore, in this embodiment, since the mating sleeve 170 is provided with an annular groove 172, the sealing ring 180 is disposed within the annular groove 172. In other embodiments, the sealing ring 180 may also be disposed on the side of the cylinder 110; therefore, the sealing ring 180 is disposed between the mating surfaces of the lower cover 150 and the mating sleeve 170. Similarly, a sealing ring 180 may also be disposed between the mating surfaces of the upper cover 190 and the cylinder 110.

[0069] In summary, this embodiment uses a locking buckle 130 to quickly fix the endoscope insertion part 210 onto the leak testing fixture 100, thereby connecting the cavity of the insertion part 210 and the chamber 111 of the cylindrical body 110. Furthermore, the adjusting member 160 allows for the fixing of insertion parts of various sizes. During testing, the insertion part 210 is placed in water, and gas is introduced into the air inlet channel 121 of the air inlet pipe 120, allowing the gas to flow sequentially through the chamber 111 and the cavity. Operators can observe the location of air bubbles generated in the insertion part 210 to determine whether the sealing of the insertion part 210 is satisfactory and whether there is any leakage. Furthermore, this embodiment includes a pressure relief valve 140. After the test is completed and before removing the insertion part 210, the pressure is released through the pressure relief valve 140 to connect the chamber 111 with the outside, thereby balancing the pressure in the chamber 111 with the external pressure and preventing damage to the leak testing fixture 100 and the insertion part 210 due to sudden changes in internal and external pressure. This embodiment has a simple structure and is easy to operate, thus enabling rapid testing of the sealing performance of the insertion part 210.

[0070] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A leak detection fixture, characterized in that, include: A cylindrical body (110) having a chamber (111) and a mounting hole (112) provided on the peripheral wall of the cylindrical body (110); An air intake pipe (120) is connected to one end of the cylinder (110); the air intake pipe (120) is provided with an air intake channel (121), which is connected to the cylinder (110); A latch (130) is connected to the other end of the cylinder (110) and is used to lock or unlock the insertion part (210) of the endoscope; A pressure relief valve (140) is installed in the mounting hole (112) and is used to adjust the communication state between the chamber (111) and the outside. The cavity (111) is connected to the cavity of the insertion part (210).

2. The leak detection fixture according to claim 1, characterized in that, The pressure relief valve (140) includes an elastic pressing element (141), a valve core (142), and a valve seat (143). The elastic pressing element (141) is sleeved on the valve core (142) and connected to the valve seat (143). The valve core (142) is movably sleeved on the valve seat (143), and the valve core (142) has at least a first position and a second position. The valve seat (143) is installed in the mounting hole (112). The valve core (142) is provided with a vent groove (1421), and the valve seat (143) is provided with a vent hole (1431). When the valve core (142) is in the first position, the chamber (111) is connected to the outside through the vent groove (1421) and the vent hole (1431). When the valve core (142) is in the second position, the valve core (142) blocks the chamber (111).

3. The leak detection fixture according to claim 2, characterized in that, The pressure relief valve (140) further includes a sealing element (144), which is installed in the mounting hole (112) and connected to the valve seat (143); the valve core (142) is movably sleeved on the sealing element (144); The valve core (142) is provided with a sealing part (1422) at one end near the vent groove (1421). When the valve core (142) is in the second position, the sealing part (1422) is in contact with the sealing element (144).

4. The leak detection fixture according to claim 1, characterized in that, The leak testing fixture (100) also includes a lower cover (150); the lower cover (150) is provided with a mating hole (152) for engaging with the insertion part (210); the latch (130) is rotatably connected to the lower cover (150) to lock or unlock the insertion part (210).

5. The leak detection fixture according to claim 4, characterized in that, The latch (130) is provided with a bent portion (131) and a connecting portion (132) that are connected to each other; the connecting portion (132) is rotatably connected to the lower cover (150); the bent portion (131) is used to lock or unlock the insertion portion (210).

6. The leak detection fixture according to claim 5, characterized in that, The leak testing fixture (100) also includes an adjusting component (160), which is connected to the lower cover (150); the connecting part (132) is provided with a through hole (133), which is rotatably engaged with the adjusting component (160), and the adjusting component (160) is used to adjust the distance between the latch (130) and the bottom wall of the lower cover (150).

7. The leak detection fixture according to claim 5, characterized in that, The leak testing fixture (100) also includes a mating sleeve (170); The fitting sleeve (170) is provided with a protrusion (171), and the lower cover (150) is provided with a sliding groove (151). The protrusion (171) and the sliding groove (151) are movably engaged.

8. The leak detection fixture according to claim 7, characterized in that, The leak testing fixture (100) also includes a sealing ring (180), which is disposed between the mating surfaces of the lower cover (150) and the mating sleeve (170).

9. A sealing detection device, characterized in that, The device includes an insertion part (210) of an endoscope and a leak detection fixture (100) according to any one of claims 1-8, wherein the tail end of the insertion part (210) is connected to the leak detection fixture (100); the cavity of the insertion part (210) is in communication with the chamber (111) and the air inlet channel (121).

10. The sealing detection device according to claim 9, characterized in that, The sealing detection device (200) further includes a fixed sleeve (220) and a conical sleeve (230); the fixed sleeve (220) is connected to the tail end of the insertion part (210); the conical sleeve (230) is fitted onto the fixed sleeve (220) and engages with the mating hole (152).

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