Air tightness detection connecting assembly and air tightness detector comprising same

Abstract

The utility model relates to the technical field of air tightness detection, and discloses an air tightness detection connecting assembly and an air tightness detector comprising the same, the air tightness detection connecting assembly comprises a detection probe, a connecting piece and an air pipe joint; one end of the detection probe is detachably connected with equipment to be detected, the other end of the detection probe is detachably connected with the gas pipe joint through the connecting piece, and the other end of the gas pipe joint is connected with a gas pipe wire; the number of the detection probes is multiple, and the models of the ends, close to the to-be-detected equipment, of the multiple detection probes are different so as to adapt to different to-be-detected equipment; and the detection probe, the connecting piece, the gas pipe joint and the gas pipe connecting wire are provided with a through first fluid channel. The air tightness detection connecting assembly is good in universality, and can effectively improve the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment air tightness detection, in particular to an air tightness detection connection component and an air tightness detector comprising the same. Background Art

[0002] As a core component in a wind power generation system, the yaw pitch reducer plays a vital role in improving power generation efficiency and ensuring stable system operation. The reducer must undergo a strict air tightness test before leaving the factory. The air tightness test mainly checks whether there is leakage of gear oil, gas, etc. at the various connection parts of the reducer. Among them, the leakage of gear oil can be observed with the naked eye at the various connection parts and various screw plugs of the reducer, while the air leakage detection is a relatively small change and needs to be obtained through an air tightness test using an air tightness tester. However, existing air tightness testers are usually integrated with the detection probe and the air pipe connection, which has poor versatility. In addition, the air pipe connection is long and inconvenient to move, resulting in low work efficiency.

[0003] Therefore, how to provide an airtightness detection connection assembly that is versatile and easy to use is an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the utility model provides an airtightness detection connection assembly and an airtightness detector comprising the same, so as to solve the problems of poor versatility and low working efficiency of existing airtightness detectors.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] On the one hand, the utility model provides an airtightness detection connection assembly, comprising a detection probe, a connector and an air pipe joint;

[0007] One end of the detection probe is detachably connected to the device to be detected, and the other end is detachably connected to the trachea joint via the connecting piece, and the other end of the trachea joint is connected to the trachea wiring;

[0008] There are multiple detection probes, and the ends of the multiple detection probes close to the device to be detected are of different models to adapt to different devices to be detected;

[0009] The detection probe, the connecting piece, the air pipe joint and the air pipe connection are provided with a first fluid passage that passes through.

[0010] Preferably, it further comprises an instrument seat, one end of the instrument seat is detachably connected to the connecting piece, and the other end is detachably connected to the air pipe joint, and the instrument seat is provided with the first fluid channel.

[0011] Preferably, a conversion joint is further included, the instrument seat is provided with a mounting hole connected to the fluid channel, one end of the conversion joint is detachably connected to the instrument seat through the mounting hole, and the other end is detachably connected to a pressure gauge, and the conversion joint is provided with a second fluid channel connected to the first fluid channel.

[0012] Preferably, the conversion joint includes a first connecting portion and a first operating portion;

[0013] One end of the first connecting portion is fixed to the mounting hole, and the other end is integrally formed with the first operating portion, and the other end of the first operating portion is connected to the pressure gauge;

[0014] The first operating portion is provided with at least one set of first operating surfaces that are oppositely arranged, and the first operating surfaces are plane.

[0015] Preferably, the connecting member includes a second connecting portion, a second operating portion and a gripping portion;

[0016] The second operating portion is provided at both ends of the holding portion, and the second connecting portion is provided at one end of the second operating portion away from the holding portion; the two second connecting portions are respectively connected to the detection probe and the instrument base;

[0017] Any of the second operating parts is provided with at least one set of second operating surfaces that are oppositely arranged, and the second operating surfaces are plane.

[0018] Preferably, the instrument base includes a third connecting portion, a third operating portion and a fourth connecting portion which are arranged in sequence;

[0019] The instrument seat is connected to the connecting piece and the air pipe joint through the third connecting part and the fourth connecting part respectively;

[0020] The third operating portion is provided with at least one set of third operating surfaces that are arranged opposite to each other. The third operating surfaces are planes, and the mounting holes are opened on the third operating surfaces.

[0021] Preferably, the detection probe includes a fifth connecting portion and a fourth operating portion;

[0022] One end of the fifth connecting portion is connected to the device to be detected, and the other end is integrally formed with the fourth operating portion, and the other end of the fourth operating portion is detachably connected to the connecting member;

[0023] The fourth operating portion is provided with at least one set of fourth operating surfaces arranged opposite to each other, and the fourth operating surfaces are plane.

[0024] Preferably, the tracheal joint includes a sixth connecting portion, a fifth operating portion and a seventh connecting portion which are arranged in sequence;

[0025] The trachea joint is connected to the instrument base and the trachea connection through the sixth connecting portion and the seventh connecting portion respectively;

[0026] The fifth operating portion is provided with at least one set of fifth operating surfaces arranged opposite to each other, and the fifth operating surfaces are plane.

[0027] Preferably, there are multiple air pipe connectors, and the models of the ends of the multiple air pipe connectors close to the air pipe wiring are different to adapt to different models of the air pipe wiring.

[0028] Preferably, the tracheal joint is equipped with an adjustable pressure reducing valve.

[0029] On the other hand, the present invention further provides an airtightness detector, comprising any of the airtightness detection connection components described above.

[0030] The utility model provides an airtightness detection connection assembly, which has the following advantages compared with the prior art:

[0031] The airtightness detection connection assembly of the present invention includes a detection probe, a connector and an air pipe joint. The various components are detachably connected, and multiple detection probes are provided according to the different sizes of the equipment to be detected. Therefore, different models of detection probes can be replaced to be suitable for different equipment to be detected, thereby achieving the versatility and standardization of the airtightness detection assembly; in addition, since the detection probe and other components are detachably connected, there is no need to move the air pipe wiring during use. It is only necessary to replace the appropriate detection probe, and the airtightness detection can be performed with the help of the fluid channels that pass through the various components. The operability is high and the work efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figure 1 This is a schematic diagram of the airtightness detection connection assembly of the utility model in use;

[0034] Figure 2 This is a structural diagram of the air tightness detection connection assembly of the utility model;

[0035] Figure 3 It is a cross-sectional view of the air tightness detection connection assembly of the utility model;

[0036] Figure 4This is a schematic diagram of the structure of the detection probe of the utility model;

[0037] Figure 5 It is a cross-sectional view of the detection probe of the utility model;

[0038] Figure 6 It is a structural diagram of the connector of the utility model;

[0039] Figure 7 It is a cross-sectional view of the connector of the utility model;

[0040] Figure 8 This is a structural diagram of the instrument base of the utility model;

[0041] Figure 9 It is a cross-sectional view of the instrument base of the utility model;

[0042] Figure 10 This is a schematic structural diagram of the conversion joint of the utility model;

[0043] Figure 11 It is a cross-sectional view of the conversion joint of the utility model;

[0044] Figure 12 It is a side view of the conversion joint of the utility model;

[0045] Figure 13 This is a structural diagram of the utility model trachea joint;

[0046] Figure 14 It is a cross-sectional view of the utility model trachea joint.

[0047] In the figure:

[0048] 100-detection probe, 110-fifth connection part, 120-fourth operating part, 121-fourth operating surface, 200-connecting piece, 210-second connection part, 220-second operating part, 221-second operating surface, 230-holding part, 300-instrument base, 310-third connection part, 320-third operating part, 321-third operating surface, 330-fourth connection part, 340-mounting hole, 400-trachea joint, 410-sixth connection part, 420-fifth operating part, 421-fifth operating surface, 430-seventh connection part, 500-conversion joint, 510-first connection part, 520-first operating part, 521-first operating surface, 600-device to be detected, 700-first fluid channel, 800-second fluid channel. DETAILED DESCRIPTION

[0049] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] like Figures 1 to 3 As shown, an embodiment of the present invention provides an airtightness detection connection assembly, including a detection probe 100, a connector 200 and an air pipe joint 400; one end of the detection probe 100 is detachably connected to the device to be detected 600, and the other end is detachably connected to the air pipe joint 400 through the connector 200, and the other end of the air pipe joint 400 is connected to the air pipe wiring; there are multiple detection probes 100, and the models of the multiple detection probes 100 close to the end of the device to be detected 600 are different to adapt to different devices to be detected 600; the detection probe 100, the connector 200, the air pipe joint 400 and the air pipe wiring are provided with a through first fluid channel 700.

[0054] It can be understood that the air tightness detection connection assembly of the present invention includes a detection probe 100, a connector 200 and an air pipe connector 400. The various components are detachably connected, and multiple detection probes 100 are provided according to the different sizes of the equipment 600 to be detected. Therefore, different models of detection probes 100 can be replaced to be suitable for different equipment 600 to be detected, thereby achieving the universality and standardization of air tightness detection tooling; in addition, since the other components of the detection probe 100 are detachably connected, there is no need to move the air pipe wiring during use. It is only necessary to replace the appropriate detection probe 100, and use the fluid channels that pass through the various components to perform air tightness detection. It has high operability and effectively improves work efficiency.

[0055] In some embodiments of the present invention, an instrument base 300 is further included, one end of the instrument base 300 is detachably connected to the connector 200, and the other end is detachably connected to the trachea connector 400, and the instrument base 300 is provided with a first fluid channel 700 to enable the fluid to flow from the detection probe 100 to the connector 200, the instrument base 300, and the trachea connector 400 in sequence.

[0056] Optionally, a conversion joint 500 is also included, the instrument base 300 is provided with a mounting hole 340 connected to the fluid channel, one end of the conversion joint 500 is detachably connected to the instrument base 300 through the mounting hole 340, and the other end is detachably connected to a pressure gauge, and the conversion joint 500 is provided with a second fluid channel 800 connected to the first fluid channel 700.

[0057] It can be understood that the first fluid channel 700 and the second fluid channel 800 are interconnected, and the pressure gauge is preferably a digital pressure gauge. The pressure gauge connected through the conversion joint 500 can detect and display the changes in the fluid pressure in the first fluid channel 700 in real time, and determine whether there is a fluid leakage based on the changes in the fluid pressure.

[0058] It should be noted that the connection between the various components such as the detection probe 100, the connector 200, the instrument seat 300, the air pipe joint 400, the conversion joint 500 and the pressure gauge can be a threaded connection or a clamp connection, etc., preferably a threaded connection. When the connection between the various components is not tight, a tight connection can be achieved by wrapping the raw tape to ensure the overall sealing performance. The threaded connection is used as an example for explanation in the embodiment of the present invention.

[0059] In some embodiments of the present invention, Figure 10 、 Figure 11 、 Figure 12As shown, the conversion joint 500 includes a first connecting portion 510 and a first operating portion 520; one end of the first connecting portion 510 is cylindrical and is threadedly connected to the mounting hole 340, and the other end is integrally formed with the first operating portion 520, and the other end of the first operating portion 520 is connected to the pressure gauge; the first operating portion 520 is provided with at least one set of first operating surfaces arranged oppositely, and the first operating surface is flat, for example, the first operating portion 520 is cylindrical and has at least one set of flat surfaces arranged oppositely on the side surface of the cylinder.

[0060] Optionally, the first connecting portion 510 and the first operating portion 520 are coaxially arranged and the outer diameter of the first connecting portion 510 is smaller than the outer portion of the first operating portion 520 , so that the first operating portion can abut against the side of the instrument base.

[0061] It can be understood that the connection between the conversion joint 500 and the instrument socket 300 can be achieved through the first connecting portion 510, and the connection between the conversion joint 500 and the pressure gauge can be achieved through the first operating portion 520, and the fluid pressure in the first fluid channel 700 can be detected by the pressure gauge; in addition, the setting of the first operating surface facilitates the operator to tighten the conversion joint 500 to ensure that the conversion joint 500 and the instrument socket 300 can be tightly connected and the airtightness of the connection between the components can be ensured. In addition, relevant markings can also be made on the first operating surface to facilitate the distinction between components or identification of models, etc.

[0062] In some embodiments of the present invention, Figure 6 、 Figure 7 As shown, the connecting member 200 includes a second connecting portion 210, a second operating portion 220 and a gripping portion 230; the second operating portion 220 is provided at both ends of the gripping portion 230, and the second connecting portion 210 is provided at one end of the second operating portion 220 away from the gripping portion 230; the two second connecting portions 210 are respectively connected to the detection probe 100 and the instrument base 300; any second operating portion 220 is provided with at least one set of oppositely arranged second operating surfaces, and the second operating surfaces are flat.

[0063] Optionally, the second connecting portion 210 and the gripping portion 230 are both cylindrical, and the second operating portion 220 is a cylinder having at least one set of oppositely arranged flat surfaces on a side surface of the cylinder.

[0064] It can be understood that the connection between the connector 200 and the detection probe 100 and the instrument base 300 can be achieved through the second connecting part 210. Since the length of the connector 200 is relatively long, preferably 40-60 cm, the gripping part 230 facilitates the operation process of the operator. The setting of the second operating surface facilitates the operator to tighten the connector 200 to ensure a tight connection between the connector 200 and the detection probe 100, and the connector 200 and the instrument base 300, to ensure the airtightness of the connection between the components, and relevant markings can also be made on the second operating surface to facilitate the distinction between components or identification of models, etc.

[0065] In some embodiments of the present invention, Figure 8 、 Figure 9 As shown, the instrument base 300 includes a third connecting portion 310, a third operating portion 320 and a fourth connecting portion 330 arranged in sequence; the instrument base 300 is connected to the connecting piece 200 and the trachea connector 400 through the third connecting portion 310 and the fourth connecting portion 330 respectively; the third operating portion 320 has at least one set of third operating surfaces arranged opposite to each other, the third operating surface is flat, and the mounting hole 340 is opened on the third operating surface.

[0066] Optionally, the third connecting portion 310 and the fourth connecting portion 330 are both cylindrical, and the second operating portion 220 is a cylinder having at least one set of oppositely arranged flat surfaces on a side surface of the cylinder.

[0067] It can be understood that the connection between the instrument seat 300 and the connecting piece 200 can be achieved through the third connecting part 310, preferably, the connecting piece is screwed into the threaded hole of the third connecting part 310, and the connection between the instrument seat 300 and the trachea connector 400 can be achieved through the fourth connecting part 330, preferably, the trachea connector 400 is screwed into the threaded hole of the fourth connecting part 330. The setting of the third operating surface facilitates the operator to tighten the instrument seat 300. In addition, relative planes can be set on the side surfaces of the third connecting part 310 and the fourth connecting part 330 for tightening operations to ensure a tight connection between the instrument seat 300 and the connecting piece 200, and between the instrument seat 300 and the trachea connector 400, to ensure the airtightness of the connection between the components, and relevant markings can also be made on the third operating surface to facilitate the distinction between components or identification of models, etc.

[0068] In some embodiments of the present invention, Figure 4 、 Figure 5As shown, the detection probe 100 includes a fifth connecting part 110 and a fourth operating part 120; one end of the fifth connecting part 110 is cylindrical and connected to the device to be detected 600, and the other end is integrally formed with the fourth operating part 120, and the other end of the fourth operating part 120 is detachably connected to the connecting member 200, preferably, the connecting member 200 is screwed into the threaded hole of the fourth operating part 120; the fourth operating part 120 is provided with at least one set of relatively arranged fourth operating surfaces 121, and the fourth operating surface 121 is flat, for example, the fourth operating part 120 is cylindrical and has at least one set of relatively arranged planes on the side surface of the cylinder.

[0069] Optionally, the fifth connecting portion 110 and the fourth operating portion 120 are coaxially arranged and the outer diameter of the fifth connecting portion 110 is smaller than the outer diameter of the fourth operating portion 120 , so that the fourth operating portion 120 can abut against a side of the device to be detected 600 .

[0070] It can be understood that the connection between the detection probe 100 and the device to be detected 600 can be achieved through the fifth connecting part 110. If there is a fluid leakage in the device to be detected 600, the leaked fluid will enter the first fluid channel 700 through the detection probe 100; in addition, the setting of the fourth operating surface 121 is convenient for the operator to tighten the detection probe 100 to ensure that the detection probe 100 and the device to be detected 600 can be tightly connected to ensure the airtightness of the connection between components, and relevant markings can also be made on the fourth operating surface 121 to facilitate the distinction between components or identification of models, etc.

[0071] In some embodiments of the present invention, Figure 13 、 Figure 14 As shown, the trachea connector 400 includes a sixth connecting portion 410, a fifth operating portion 420 and a seventh connecting portion 430 arranged in sequence; the trachea connector 400 is connected to the instrument base 300 and the trachea connection through the sixth connecting portion 410 and the seventh connecting portion 430 respectively; the fifth operating portion 420 has at least one set of relatively arranged fifth operating surfaces, and the fifth operating surfaces are flat.

[0072] Optionally, the seventh connecting part 430 can be a cylinder, and the sixth connecting part 410 can be composed of two cylinders with different outer diameters, and the outer diameter of the cylinder close to one end of the device to be detected 600 is smaller than the outer diameter of the other cylinder away from one end of the device to be detected 600, so that after the sixth connecting part 410 is screwed into the threaded hole of the instrument holder 300, the instrument holder 300 can abut against the connection between the two cylinders, thereby improving the stability of the connection; the fifth operating part 420 is a cylinder and has at least one set of planes arranged relatively to each other on the side surface of the cylinder. For example, when it is set as multiple sets of planes, it can be a rectangular parallelepiped.

[0073] It can be understood that the connection between the trachea connector 400 and the instrument seat 300 can be achieved through the sixth connecting part 410, and the connection between the trachea connector 400 and the trachea connection can be achieved through the seventh connecting part 430, so as to realize the circulation of fluid in the fluid pipeline; in addition, the setting of the fifth operating surface is convenient for the operator to tighten the detection probe 100 to ensure that the detection probe 100 and the device to be detected 600 can be tightly connected to ensure the airtightness of the connection between the components, and relevant markings can also be made on the fifth operating surface to facilitate the distinction between components or identification of models, etc.

[0074] In some embodiments of the present invention, there are multiple air pipe connectors 400 , and the models of the ends of the multiple air pipe connectors 400 close to the air pipe wiring are different to adapt to different models of air pipe wiring.

[0075] It can be understood that multiple trachea connectors 400 can be set according to the different sizes of trachea wiring. Therefore, different models of trachea connectors 400 can be replaced to adapt to trachea wiring of different sizes, thereby further realizing the universality and standardization of air tightness detection tooling; in addition, since the trachea connector 400 and other components are detachably connected, there is no need to move the trachea wiring during use, only the appropriate trachea connector 400 needs to be replaced, which has high operability and effectively improves work efficiency.

[0076] Optionally, the trachea connector 400 is equipped with an adjustable pressure reducing valve. By installing the adjustable pressure reducing valve, the pressure of the fluid entering the trachea connection can be adjusted according to the data of the fluid pressure in the fluid channel detected by the pressure gauge to control the size of the fluid pressure.

[0077] The working process of the airtightness detection connection assembly of the utility model is:

[0078] Connect the detection probe 100 that meets the specifications of the device to be tested 600 with the connector 200, the instrument base 300, and the air pipe connector 400. Connect a pressure gauge for detecting fluid pressure to one side of the instrument base 300 through the conversion connector 500 to obtain an airtightness detection connection assembly. When needed, screw the airtightness detection connection assembly into the corresponding screw plug hole of the device to be tested 600. This completes the entire operation process of combining the airtightness detection connection assembly and the device to be tested 600.

[0079] In summary, the air tightness detection connection assembly provided by the embodiment of the present invention is compatible with a variety of equipment to be tested, realizing the universality and standardization of tooling. During use, there is no need to move the air pipe wiring, only the appropriate detection probe and air pipe joint need to be replaced. It has high operability, is easy to manage and can save costs. When performing air tightness testing, it is only necessary to connect the air source to the air pipe joint, pressurize and maintain the pressure and observe the changes in the pressure gauge. It has high operability and effectively improves work efficiency.

[0080] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An airtightness detection connection assembly, characterized in that: Including detection probe, connector and air pipe joint; One end of the detection probe is detachably connected to the device to be detected, and the other end is detachably connected to the trachea joint via the connecting piece, and the other end of the trachea joint is connected to the trachea wiring; There are multiple detection probes, and the ends of the multiple detection probes close to the device to be detected are of different models to adapt to different devices to be detected; The detection probe, the connecting piece, the air pipe joint and the air pipe connection are provided with a first fluid passage that passes through.

2. The airtightness detection connection assembly according to claim 1, characterized in that: It also includes an instrument seat, one end of which is detachably connected to the connecting piece, and the other end of which is detachably connected to the air pipe joint, and the instrument seat is provided with the first fluid channel.

3. The airtightness detection connection assembly according to claim 2, characterized in that: It also includes a conversion joint, the instrument seat is provided with a mounting hole connected to the fluid channel, one end of the conversion joint is detachably connected to the instrument seat through the mounting hole, and the other end is detachably connected to a pressure gauge, and the conversion joint is provided with a second fluid channel connected to the first fluid channel.

4. The airtightness detection connection assembly according to claim 3, characterized in that: The conversion joint includes a first connecting portion and a first operating portion; One end of the first connecting portion is fixed to the mounting hole, and the other end is integrally formed with the first operating portion, and the other end of the first operating portion is connected to the pressure gauge; The first operating portion is provided with at least one set of first operating surfaces arranged opposite to each other, and the first operating surfaces are plane.

5. The airtightness detection connection assembly according to claim 2, characterized in that: The connecting member includes a second connecting portion, a second operating portion and a gripping portion; The second operating portion is provided at both ends of the holding portion, and the second connecting portion is provided at one end of the second operating portion away from the holding portion; the two second connecting portions are respectively connected to the detection probe and the instrument base; Any of the second operating parts is provided with at least one set of second operating surfaces that are oppositely arranged, and the second operating surfaces are plane.

6. The airtightness detection connection assembly according to claim 3, characterized in that: The instrument base includes a third connecting portion, a third operating portion and a fourth connecting portion arranged in sequence; The instrument seat is connected to the connecting piece and the air pipe joint through the third connecting part and the fourth connecting part respectively; The third operating portion is provided with at least one set of third operating surfaces that are arranged opposite to each other. The third operating surfaces are planes, and the mounting holes are opened on the third operating surfaces.

7. The airtightness detection connection assembly according to claim 1, characterized in that: The detection probe includes a fifth connecting portion and a fourth operating portion; One end of the fifth connecting portion is connected to the device to be detected, and the other end is integrally formed with the fourth operating portion, and the other end of the fourth operating portion is detachably connected to the connecting member; The fourth operating portion is provided with at least one set of fourth operating surfaces arranged opposite to each other, and the fourth operating surfaces are plane.

8. The airtightness detection connection assembly according to claim 2, characterized in that: The tracheal joint includes a sixth connecting portion, a fifth operating portion and a seventh connecting portion which are arranged in sequence; The trachea joint is connected to the instrument base and the trachea connection through the sixth connecting portion and the seventh connecting portion respectively; The fifth operating portion is provided with at least one set of fifth operating surfaces arranged opposite to each other, and the fifth operating surfaces are plane.

9. The airtightness detection connection assembly according to claim 1, characterized in that: There are multiple tracheal connectors, and the models of the ends of the tracheal connectors close to the tracheal wiring are different to adapt to different models of tracheal wiring; The trachea joint is equipped with an adjustable pressure reducing valve.

10. An airtightness detector, characterized in that: The invention comprises the airtightness detection connection assembly according to any one of claims 1 to 9.

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