Airtightness detection device and airtightness detection method for insertion part of endoscope

Abstract

The invention relates to the technical field of endoscope detection, and discloses an airtightness detection device and method for an insertion part of an endoscope, the insertion part of the endoscope comprises a main hose and a head end part, and the head end part is connected to one end of the main hose in a sealing manner; the air tightness detection device for the insertion part of the endoscope comprises a sealing joint, a sealing pipe and a leak detection device, the sealing joint is connected to the other end of the main hose, a first through hole is formed in the sealing joint, and the first through hole is communicated with the interior of the main hose; the sealing pipe comprises a first sealing end and a second sealing end, and the first sealing end is in sealing connection with the sealing joint; according to the invention, the whole machine of the endoscope is installed after the air tightness of the insertion part is ensured to be good, the product quality of the whole machine of the endoscope is improved, and the labor and material cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscope detection, and in particular to an airtightness detection device and an airtightness detection method for an insertion portion of an endoscope. Background Art

[0002] As a commonly used medical device, endoscope consists of an operating handle and an insertion part. Since the insertion part is provided with structures such as lighting and camera, sufficient airtightness needs to be maintained in order to ensure the normal use of the insertion part.

[0003] The air tightness detection device in the related art performs air tightness detection on the insertion part after the operating handle and the insertion part are assembled. If the air tightness detection fails, rework and disassembly are required. However, the rework and disassembly process can easily cause damage to the insertion part, increasing manpower, time and material costs. Summary of the invention

[0004] In view of this, the present invention provides an airtightness detection device and an airtightness detection method for the insertion part of an endoscope, so as to solve the problem that the airtightness detection device in the related art performs the airtightness detection of the insertion part after the assembly of the operating handle and the insertion part is completed. If the airtightness detection fails, rework and disassembly are required, which increases the manpower, time and material costs.

[0005] The present invention provides an air-tightness detection device for an insertion part of an endoscope, wherein the insertion part of the endoscope comprises a main hose and a head end portion, wherein the head end portion is sealingly connected to one end of the main hose; the air-tightness detection device for the insertion part of the endoscope comprises a sealing joint, a sealing tube and a leak detection device; the sealing joint is connected to the other end of the main hose, wherein a first through hole is provided on the sealing joint, wherein the first through hole is connected to the interior of the main hose; the sealing tube comprises a first sealing end and a second sealing end, wherein the first sealing end is sealingly connected to the sealing joint; the leak detection device is sealingly connected to the second sealing end and is used for measuring the air-tightness of the insertion part.

[0006] Beneficial effect: A sealed connection between the leak detection device and the main hose is achieved by providing a sealing tube and a sealing joint, so that the air tightness of the insertion part can be tested before installation. The endoscope is installed only after the air tightness of the insertion part is ensured to be good, thereby improving the product quality of the endoscope and saving labor and material costs.

[0007] In an optional embodiment, the sealing joint includes a first sealing section, which is sleeved on the outer circumference of the main hose; a connecting hole is provided in the first sealing end; the first sealing section is located in the connecting hole and is sealed and connected to the connecting hole.

[0008] Beneficial effect: By setting the first sealing section on the sealing joint, a sealed connection between the sealing joint and the first sealing end is achieved, thereby ensuring the sealing of the connection between the sealing joint and the first sealing end, facilitating the airtightness detection of the insertion part, and the installation process is simple and quick, thereby improving work efficiency.

[0009] In an optional embodiment, the airtightness detection device of the insertion portion of the endoscope further includes a sealing member, which is sealingly connected to the first sealing end.

[0010] Beneficial effect: By providing a sealing connection between the sealing member and the first sealing end, the sealing of the first sealing end is ensured, and leakage is prevented when the leak detection device detects the air tightness of the insertion part, thereby improving the detection accuracy of the air tightness of the insertion part.

[0011] In an optional embodiment, the sealing member includes a connecting section and a second sealing section; the connecting section is provided with an internal threaded hole, the first sealing end is provided with an external thread, and the internal threaded hole is threadedly connected to the external thread; the second sealing section is connected to one end of the connecting section, and the second sealing section is provided with a second through hole, the second through hole is connected to the internal threaded hole, the second sealing section is sleeved on the outer periphery of the main hose through the second through hole, and the diameter of the second through hole is smaller than the inner diameter of the first sealing end.

[0012] Beneficial effects: By setting the internal thread hole and the external thread, a threaded connection between the seal and the first sealing end is achieved, which is convenient for the connection between the seal and the first sealing end when the air-tightness test of the insertion part is carried out, and also convenient for the disassembly between the seal and the first sealing end after the air-tightness test of the insertion part is completed; because the threaded connection can provide a strong fastening force, the connection is ensured to be tightly combined, which not only ensures the stability of the connection between the sealing joint and the first sealing end, but also ensures the sealing of the connection between the sealing joint and the first sealing end, and the installation process is simple and quick, thereby improving work efficiency; by setting the second sealing section, it is possible to prevent the main hose from falling off from the first sealing end, and to improve the sealing of the connection between the main hose and the first sealing end.

[0013] In an optional embodiment, the leak detection device includes a leak detection joint, which is sealed and connected to the second sealing end; a connecting hole is provided in the leak detection joint; the second sealing end is located in the connecting hole and is detachably connected to the connecting hole.

[0014] Beneficial effect: By setting the leak detection joint and the second sealing end to be sealed, the sealing of the connection between the leak detection joint and the second sealing end is ensured, and the leakage phenomenon is prevented when the leak detection device detects the air tightness of the insertion part, and the detection accuracy of the air tightness of the insertion part is improved. By setting the connecting hole, the detachable connection between the leak detection joint and the second sealing end is realized, which is convenient for the connection between the second sealing end and the leak detection joint when the air tightness detection of the insertion part is performed, and also convenient for the disassembly between the second sealing end and the leak detection joint after the air tightness detection of the insertion part is completed.

[0015] In an optional embodiment, the leak detection joint also includes a first sealing groove and a first sealing ring; the first sealing groove is located on the side wall of the connecting hole and is circumferentially arranged around the connecting hole; one side of the first sealing ring is connected to the first sealing groove, and the other side protrudes from the first sealing groove and abuts against the second sealing end.

[0016] Beneficial effect: Since the first sealing ring has good sealing performance and can prevent gas leakage, the connection between the leak detection joint and the second sealing end can be sealed, preventing leakage when the leak detection device detects the air tightness of the insertion part, thereby improving the detection accuracy of the air tightness of the insertion part.

[0017] In an optional embodiment, it also includes a connecting piece, which includes a fixed end and a clamping end; the fixed end is fixedly connected to the second sealing end; the clamping end is connected to one end of the fixed end, and the clamping end is protrudingly arranged on the outer periphery of the second sealing end; a clamping groove is provided on the side wall of the connecting hole, and the clamping end is clamped in the clamping groove.

[0018] Beneficial effect: By setting the snap-in end and the snap-in groove, the snap-in connection between the leak detection joint and the second sealing end is achieved, the stability of the connection between the leak detection joint and the second sealing end is improved, and the leak detection joint and the second sealing end are prevented from falling off and separating during the airtightness detection process.

[0019] In an optional embodiment, a connecting groove is further provided on the side wall of the connecting hole, and the connecting groove is located at one end of the card slot, and one end of the connecting groove is connected to the card slot, and the other end extends to the end of the leak detection joint close to the sealing tube.

[0020] Beneficial effect: By setting the connecting groove, the leak detection joint and the second sealing end are detachably connected, which is convenient for the connection between the leak detection joint and the second sealing end when the air tightness test of the insertion part is performed, and also convenient for the disassembly between the leak detection joint and the second sealing end after the air tightness test of the insertion part is completed.

[0021] In an optional embodiment, a mounting groove is provided on the second sealing end, and the fixed end is installed in the mounting groove.

[0022] Beneficial effect: Through the connection between the fixed end and the installation groove, the tight connection between the connector and the sealing tube can be ensured, the stability of the connection between the connector and the sealing tube is guaranteed, and the installation process is simple and quick, which facilitates the installation and disassembly between the sealing tube and the connector, and improves work efficiency.

[0023] In a second aspect, the present invention also provides a method for detecting the air tightness of the insertion part of an endoscope, which is applied to the air tightness detection device of the insertion part of the above-mentioned endoscope, comprising: the leak detection device inflates the insertion part through the sealing tube and the sealing joint until the air pressure of the insertion part reaches a preset value; determines whether the air pressure of the insertion part can always be maintained at a preset value within a preset time; if so, the air tightness test of the insertion part is qualified; if not, the insertion part is reworked and optimized and improved.

[0024] Beneficial effect: By judging whether the air pressure of the insertion part can always be maintained at the preset value within the preset time, a strict test of the air tightness of the insertion part is achieved, ensuring that the endoscope is assembled only after the air tightness of the insertion part is good, thereby improving the product quality of the endoscope and saving labor and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A front view of an airtightness detection device for an insertion portion of an endoscope according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0028] Figure 3 is a schematic structural diagram of an insertion portion according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A partial enlarged schematic diagram of B in the middle;

[0030] Figure 5 A schematic diagram of the structure of a sealing tube according to an embodiment of the present invention;

[0031] Figure 6 is a cross-sectional view of a sealing tube according to an embodiment of the present invention;

[0032] Figure 7 is a schematic structural diagram of a sealing member according to an embodiment of the present invention;

[0033] Figure 8 It is a structural schematic diagram of a leak detection device according to an embodiment of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of a leak detection joint according to an embodiment of the present invention;

[0035] Fig.10 is a schematic structural diagram of a connecting piece according to an embodiment of the present invention;

[0036] Fig.11 It is a structural schematic diagram of the connection of a connector, a sealing tube and a leak detection joint according to an embodiment of the present invention;

[0037] Fig.12 This is a schematic diagram of the structure of the connection between the insertion portion and the operating handle of an embodiment of the present invention;

[0038] Fig.13 The figure is a flow chart of a method for detecting air tightness of an insertion portion of an endoscope according to an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Insertion part; 11. Main hose; 12. Head end; 13. Connecting harness; 14. Rubber section; 2. Sealing joint; 21. First sealing section; 22. Fixed section; 3. Sealing tube; 31. First sealing end; 32. Second sealing end; 321. Mounting groove; 4. Leak detection device; 41. Leak detection joint; 411. Connecting hole; 412. Card slot; 413. Connecting groove; 414. First sealing groove; 415. First sealing ring; 42. Airbag; 43. Leakage valve; 44. Reading meter; 45. Connecting tube; 5. Sealing member; 511. Internal threaded hole; 512. Second through hole; 6. Connecting member; 61. Fixed end; 62. Card connection end; 7. Operating handle. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] Combine the following Figures 1 to 13 , describing an embodiment of the present invention.

[0043] According to an embodiment of the present invention, on the one hand, an air-tightness detection device for the insertion part of an endoscope is provided, wherein the insertion part 1 of the endoscope comprises a main hose 11 and a head end 12, and the head end 12 is sealed and connected to one end of the main hose 11; the air-tightness detection device for the insertion part of the endoscope comprises a sealing joint 2, a sealing tube 3 and a leak detection device 4; the sealing joint 2 is connected to the other end of the main hose 11, and a first through hole is provided on the sealing joint 2, and the first through hole is connected to the interior of the main hose 11, and the connecting harness 13 passes through the first through hole and protrudes from the sealing joint 2; the sealing tube 3 comprises a first sealing end 31 and a second sealing end 32, and the first sealing end 31 is sealed and connected to the sealing joint 2; the leak detection device 4 is sealed and connected to the second sealing end 32, and is used to measure the air-tightness of the insertion part 1.

[0044] By providing the sealing tube 3 and the sealing joint 2, a sealed connection is achieved between the leak detection device 4 and the main hose 11, and the airtightness of the insertion part 1 is tested before installation. The endoscope is installed only after the airtightness of the insertion part 1 is ensured to be good, thereby improving the product quality of the endoscope and saving labor and material costs.

[0045] In a specific embodiment, the main hose 11 further includes a connecting harness 13 , and one end of the connecting harness 13 is protruding from the other end of the main hose 11 ; the end of the connecting harness 13 protruding from the main hose 11 is located inside the sealing tube 3 .

[0046] In a specific embodiment, the endoscope includes an operating handle 7 and an insertion portion 1. The insertion portion 1 also includes a rubber segment 14. The rubber segment 14 is arranged between the head end 12 and the main hose 11 and has a certain elasticity to facilitate operation at a bending angle.

[0047] In one embodiment, the sealing joint 2 includes a first sealing section 21, which is sleeved on the outer periphery of the main hose 11; a connecting hole is provided in the first sealing end 31; the first sealing section 21 is located in the connecting hole and is sealed and connected to the connecting hole.

[0048] By setting the first sealing section 21 on the sealing joint 2, a sealed connection between the sealing joint 2 and the first sealing end 31 is achieved, thereby ensuring the sealing of the connection between the sealing joint 2 and the first sealing end 31, facilitating the airtightness detection of the insertion part 1, and the installation process is simple and quick, thereby improving work efficiency.

[0049] In a specific embodiment, a second sealing groove is circumferentially provided on the outer periphery of the first sealing segment 21 , and a second sealing ring is fixedly connected in the second sealing groove, and the second sealing ring abuts against the connecting hole.

[0050] In a specific embodiment, the inner diameter of the connecting hole is larger than the inner diameter of the sealing tube 3 , and the outer diameter of the first sealing section 21 is equal to the inner diameter of the connecting hole.

[0051] As an alternative implementation, the first sealing segment 21 may be threadedly connected to the first sealing end 31 .

[0052] Preferably, the first sealing section 21 and the first sealing end 31 are connected by thread glue, which can further enhance the air tightness of the connection.

[0053] In one embodiment, the airtightness detection device of the insertion portion of the endoscope further includes a sealing member 5 , and the sealing member 5 is sealedly connected to the first sealing end 31 .

[0054] By providing a sealing connection between the sealing member 5 and the first sealing end 31 , the sealing property of the first sealing end 31 is ensured, thereby preventing leakage when the leak detection device 4 detects the airtightness of the insertion part 1 , thereby improving the detection accuracy of the airtightness of the insertion part 1 .

[0055] In one embodiment, the sealing member 5 includes a connecting section and a second sealing section; the connecting section is provided with an internal threaded hole 511, the first sealing end 31 is provided with an external thread, and the internal threaded hole 511 is threadedly connected to the external thread; the second sealing section is connected to one end of the connecting section, and the second sealing section is provided with a second through hole 512, the second through hole 512 is connected to the internal threaded hole 511, the second sealing section is sleeved on the outer periphery of the main hose 11 through the second through hole 512, and the diameter of the second through hole 512 is smaller than the inner diameter of the first sealing end 31.

[0056] By setting the internal threaded hole 511 and the external thread, the threaded connection between the seal 5 and the first sealing end 31 is realized, which is convenient for the connection between the seal 5 and the first sealing end 31 when the air-tightness test of the insertion part 1 is carried out, and also convenient for the disassembly between the seal 5 and the first sealing end 31 after the air-tightness test of the insertion part 1 is completed; because the threaded connection can provide a strong fastening force, the connection is ensured to be tightly combined, which not only ensures the stability of the connection between the sealing joint 2 and the first sealing end 31, but also ensures the sealing of the connection between the sealing joint 2 and the first sealing end 31, and the installation process is simple and quick, thereby improving work efficiency; by setting the second sealing section, it is possible to prevent the main hose 11 from falling off from the first sealing end 31, and to improve the sealing of the connection between the main hose 11 and the first sealing end 31.

[0057] Specifically, the sealing joint 2 further includes a fixed section 22 , which is sleeved on the outer circumference of the main hose 11 and has an outer diameter smaller than that of the first sealing section 21 , and the second sealing section is sleeved on the outer circumference of the fixed section 22 .

[0058] Preferably, the sealing member 5 and the first sealing end 31 are connected by thread glue, which can further enhance the air tightness of the connection.

[0059] Preferably, a third sealing ring is provided at the connection between the internal threaded hole 511 and the second through hole 512 along the circumferential direction, and the third sealing ring abuts against the first sealing end 31 .

[0060] In one embodiment, the leak detection device 4 includes a leak detection joint 41, which is sealed and connected to the second sealing end 32; a connecting hole 411 is provided in the leak detection joint 41; the second sealing end 32 is located in the connecting hole 411 and is detachably connected to the connecting hole 411.

[0061] By providing a sealed connection between the leak detection joint 41 and the second sealing end 32, the sealing property of the connection between the leak detection joint 41 and the second sealing end 32 is ensured, and leakage is prevented when the leak detection device 4 detects the air tightness of the insertion part 1, thereby improving the detection accuracy of the air tightness of the insertion part 1. By providing the connecting hole 411, a detachable connection between the leak detection joint 41 and the second sealing end 32 is achieved, which is convenient for the connection between the second sealing end 32 and the leak detection joint 41 when the air tightness of the insertion part 1 is detected, and also convenient for the disassembly between the second sealing end 32 and the leak detection joint 41 after the air tightness detection of the insertion part 1 is completed.

[0062] In one embodiment, the leak detection joint 41 also includes a first sealing groove 414 and a first sealing ring 415; the first sealing groove 414 is located on the side wall of the connecting hole 411 and is circumferentially arranged around the connecting hole 411; one side of the first sealing ring 415 is connected to the first sealing groove 414, and the other side protrudes from the first sealing groove 414 and abuts against the second sealing end 32.

[0063] Since the first sealing ring 415 has good sealing performance and can prevent gas leakage, the connection between the leak detection joint 41 and the second sealing end 32 can be sealed, preventing leakage when the leak detection device 4 detects the airtightness of the insertion part 1, thereby improving the detection accuracy of the airtightness of the insertion part 1.

[0064] In one embodiment, a connecting member 6 is further included, and the connecting member 6 includes a fixed end 61 and a clamping end 62; the fixed end 61 is fixedly connected to the second sealing end 32; the clamping end 62 is connected to one end of the fixed end 61, and the clamping end 62 is protrudingly arranged on the outer periphery of the second sealing end 32; a clamping groove 412 is provided on the side wall of the connecting hole 411, and the clamping end 62 is clamped in the clamping groove 412.

[0065] By providing the snap-fit ​​end 62 and the snap-fit ​​groove 412, the snap-fit ​​connection between the leak detection joint 41 and the second sealing end 32 is achieved, thereby improving the stability of the connection between the leak detection joint 41 and the second sealing end 32 and preventing the leak detection joint 41 and the second sealing end 32 from falling off and separating during the airtightness detection process.

[0066] In one embodiment, a connecting groove 413 is further provided on the side wall of the connecting hole 411, and the connecting groove 413 is located at one end of the card slot 412, and one end of the connecting groove 413 is connected to the card slot 412, and the other end extends to the end of the leak detection joint 41 close to the sealing tube 3.

[0067] By providing the connecting groove 413, a detachable connection between the leak detection joint 41 and the second sealing end 32 is achieved, which is convenient for the connection between the leak detection joint 41 and the second sealing end 32 when the air-tightness test of the insertion part 1 is performed, and is also convenient for the disassembly between the leak detection joint 41 and the second sealing end 32 after the air-tightness test of the insertion part 1 is completed.

[0068] In one embodiment, a mounting groove 321 is disposed on the second sealing end 32 , and the fixing end 61 is installed in the mounting groove 321 .

[0069] By connecting the fixed end 61 with the mounting groove 321, the tight connection between the connector 6 and the second sealing end 32 can be ensured, thereby ensuring the stability of the connection between the connector 6 and the second sealing end 32. The installation process is simple and quick, facilitating the installation and disassembly between the second sealing end 32 and the connector 6, thereby improving work efficiency.

[0070] Specifically, the diameter of the communicating hole 411 is equal to the outer diameter of the second sealing end 32 ; and the outer diameter of the second sealing end 32 is smaller than the outer diameter of the sealing tube 3 .

[0071] In a specific implementation, the fixed end 61 of the connector 6 is threadedly connected to the mounting groove 321. When the second sealing end 32 is inserted into the connecting hole 411, the clamping end 62 of the connector 6 enters the connecting groove 413 and slides from the end of the leak detection joint 41 toward the direction of the clamping groove 412. After sliding to the connecting point between the connecting groove 413 and the clamping groove 412, the sealing tube 3 is rotated to make the clamping end 62 slide in the clamping groove 412 toward the end away from the connecting groove 413, thereby realizing the clamping and fixing of the clamping end 62.

[0072] As an alternative implementation, the fixed end 61 and the mounting groove 321 may be connected by bonding, clamping or welding.

[0073] As an alternative embodiment, the leak detection connector 41 may be made of an elastically deformable material such as rubber. When the second sealing end 32 is inserted into the connecting hole 411, the leak detection connector 41 is elastically deformed until the clamping end 62 is clamped in the clamping groove 412. Then, the leak detection connector 41 returns to its original shape and is tightly fitted on the second sealing end 32.

[0074] According to an embodiment of the present invention, on the other hand, a method for detecting the air tightness of the insertion part of an endoscope is provided, which is applied to the air tightness detection device of the insertion part of the above-mentioned endoscope, comprising: the leak detection device 4 inflates the insertion part 1 through the sealing tube 3 and the sealing joint 2 until the air pressure of the insertion part 1 reaches a preset value; judging whether the air pressure of the insertion part 1 can always be maintained at a preset value within a preset time; if so, the air tightness test of the insertion part 1 is qualified; if not, the insertion part 1 is reworked and optimized and improved.

[0075] By judging whether the air pressure of the insertion part 1 can always be maintained at a preset value within a preset time, a strict test of the air tightness of the insertion part 1 is achieved, and the endoscope is assembled only after the air tightness of the insertion part 1 is ensured, thereby improving the product quality of the endoscope and saving labor and material costs.

[0076] Specifically, the preset value is 22 kPa; the preset time is three minutes.

[0077] In a specific embodiment, the leak detection device 4 includes an airbag 42, a leakage valve 43, a reading meter 44, a connecting pipe 45, etc. When in use, the main hose 11 is first sealed and connected to the first sealing end 31 of the sealing pipe 3 through the sealing joint 2, and then the sealing member 5 is set at the connection between the sealing pipe 3 and the sealing joint 2, and then the second sealing end 32 is sealed and connected to the leak detection joint 41, and then the air tightness test of the insertion part 1 is performed. When the test is performed, the leakage valve 43 of the leak detection device 4 is adjusted to ensure that the leakage valve 43 is in a closed state, and the airbag 42 is pressed, and the gas passes through the connecting pipe 45 in sequence. Inflate the insertion part 1 through the tube 45, the leak detection joint 41 and the sealing tube 3, and observe the reading meter 44 at the same time. When the air pressure on the reading meter 44 reaches 22 kPa, stop pressing the airbag 42 and keep this state for at least three minutes. If the air pressure on the reading meter does not change, it means that the air tightness of the insertion part 1 is good and can pass the air tightness test; after the insertion part 1 passes the air tightness test, the main hose 11 and the sealing tube 3 are separated, and installed and connected with the operating handle 7; if the insertion part 1 fails the air tightness test, it is reworked and optimized and improved until the air tightness test is passed.

[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An airtightness detection device for an insertion portion of an endoscope, wherein the insertion portion (1) of the endoscope comprises a main hose (11) and a head end (12), wherein the head end (12) is sealed and connected to one end of the main hose (11); characterized in that: include: A sealing joint (2) connected to the other end of the main hose (11), wherein the sealing joint (2) is provided with a first through hole, wherein the first through hole is in communication with the interior of the main hose (11); A sealing tube (3), comprising a first sealing end (31) and a second sealing end (32), wherein the first sealing end (31) is sealingly connected to the sealing joint (2); A leak detection device (4) is sealedly connected to the second sealing end (32) and is used to measure the air tightness of the insertion part (1).

2. The airtightness detection device for the insertion portion of an endoscope according to claim 1, characterized in that: The sealing joint (2) comprises a first sealing section (21), the first sealing section (21) being sleeved on the outer circumference of the main hose (11); a connecting hole is provided in the first sealing end (31); the first sealing section (21) is located in the connecting hole and is sealedly connected to the connecting hole.

3. The airtightness detection device for the insertion portion of an endoscope according to claim 2, characterized in that: The airtightness detection device of the insertion part of the endoscope further comprises a sealing member (5), wherein the sealing member (5) is sealedly connected to the first sealing end (31).

4. The airtightness detection device for the insertion portion of an endoscope according to claim 3, characterized in that: The sealing member (5) comprises: The connecting section is provided with an internal thread hole (511), the first sealing end (31) is provided with an external thread, and the internal thread hole (511) is threadedly connected to the external thread; A second sealing section is connected to one end of the connecting section, and the second sealing section is provided with a second through hole (512), the second through hole (512) is communicated with the internal threaded hole (511), the second sealing section is sleeved on the outer circumference of the main hose (11) through the second through hole (512), and the diameter of the second through hole (512) is smaller than the inner diameter of the first sealing end (31).

5. The airtightness detection device for the insertion portion of an endoscope according to any one of claims 1 to 4, characterized in that: The leak detection device (4) comprises a leak detection joint (41), and the leak detection joint (41) is sealedly connected to the second sealing end (32); A communicating hole (411) is provided in the leak detection joint (41); the second sealing end (32) is located in the communicating hole (411) and is detachably connected to the communicating hole (411).

6. The airtightness detection device for the insertion portion of an endoscope according to claim 5, characterized in that: The leak detection joint (41) further comprises: A first sealing groove (414) is located on the side wall of the communicating hole (411) and is arranged around the circumference of the communicating hole (411); The first sealing ring (415) has one side connected to the first sealing groove (414) and the other side protrudes from the first sealing groove (414) and abuts against the second sealing end (32).

7. The airtightness detection device for the insertion portion of an endoscope according to claim 6, characterized in that: It also includes a connecting member (6), wherein the connecting member (6) includes: A fixed end (61) fixedly connected to the second sealing end (32); A clamping end (62) connected to one end of the fixing end (61), and the clamping end (62) is protrudingly arranged on the outer periphery of the second sealing end (32); A clamping groove (412) is provided on the side wall of the communication hole (411), and the clamping end (62) is clamped in the clamping groove (412).

8. The airtightness detection device for the insertion portion of an endoscope according to claim 7, characterized in that: A connecting groove (413) is also provided on the side wall of the communicating hole (411), and the connecting groove (413) is located at one end of the clamping groove (412). One end of the connecting groove (413) is connected to the clamping groove (412), and the other end extends to the end of the leak detection joint (41) close to the sealing tube (3).

9. The airtightness detection device for the insertion portion of an endoscope according to claim 8, characterized in that: The second sealing end (32) is provided with a mounting groove (321), and the fixed end (61) is mounted in the mounting groove (321).

10. A method for detecting airtightness of an insertion portion of an endoscope, characterized in that: An airtightness detection device for an insertion portion of an endoscope applied to any one of claims 1 to 9, comprising: The leak detection device (4) inflates air into the insertion part (1) through the sealing tube (3) and the sealing joint (2) until the air pressure in the insertion part (1) reaches a preset value; It is determined whether the air pressure of the insertion part (1) can be maintained at a preset value within a preset time; if so, the air tightness test of the insertion part (1) is qualified; if not, the insertion part (1) is reworked and optimized and improved.

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