CN218847553U - Air tightness detection device for air ejector pipe assembly - Google Patents

Abstract

The utility model relates to an air tightness detection device for jet-propelled pipe assembly, include: the leakage detector is used for being connected with the gas ejector pipe assembly; a first plugging head; the pressing module comprises a first driving mechanism and a pressing head connected with the first driving mechanism, and the pressing head can be driven by the first driving mechanism to press the gas ejector tube assembly on the first plugging head so as to realize that the first plugging head at least plugs a nozzle on a first nozzle section of the gas ejector tube assembly; and the plugging module comprises a third driving mechanism and a second plugging head connected with the third driving mechanism, and the second plugging head can be driven by the third driving mechanism to move to a nozzle for plugging a second spray pipe section of the gas spray pipe assembly. The detection efficiency can be effectively improved, and the cost can be reduced.

Description

Air tightness detection device for air ejector pipe assembly

Technical Field

The utility model relates to gas tightness detection device especially relates to a gas tightness detection device for jet-propelled pipe assembly.

Background

In a gas water heater, a gas injection pipe assembly is a pipeline structure used for conveying gas to a fire row, wherein the gas injection pipe assembly is generally set to be a two-section structure in order to control the fire power of the gas water heater, namely the gas injection pipe assembly comprises a first spraying pipe section, a second spraying pipe section, a gas inlet pipe section, a valve and a blocking cover used for blocking forming openings on the first spraying pipe section, the second spraying pipe section and the gas inlet pipe section; nozzles are arranged on the first spray pipe section and the second spray pipe section; the air inlet pipe section is provided with an air inlet and an air inlet channel communicated with the air inlet; one end of the two ends of the air inlet channel is communicated with the first spraying pipe section, and the other end of the air inlet channel is communicated with the second spraying pipe section; the valve is arranged between the air inlet pipe section and the second spraying pipe section and used for controlling the opening or closing of the second spraying pipe section, wherein when the valve is powered off and closed, the air inlet is communicated with the first spraying pipe section to supply gas for the first spraying pipe section, so that small-fire control is realized, when the valve is powered on and opened, the air inlet is communicated with the first spraying pipe section and the second spraying pipe section to supply gas for the first spraying pipe section and the second spraying pipe section, and accordingly large-fire control is realized.

In practical application, in order to avoid gas leakage, the gas tightness detection needs to be carried out to the jet-propelled pipe assembly before it leaves the factory, and the jet-propelled pipe assembly gas tightness detection technology is including being used for carrying out the interior hourglass detection step that detects and being used for carrying out the outer hourglass detection step that detects to the leakproofness of blanking cover and casing to the leakproofness of valve, and during the detection, leak detection and outer hourglass detection in going on the jet-propelled pipe assembly through two gas tightness detection devices substeps, and is with high costs, and the clamping is troublesome, influences detection efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air tightness detection device for jet-propelled pipe assembly, it can improve detection efficiency and reduce cost effectively.

The technical problem is solved by the following technical scheme:

a gas tightness detection device for a gas lance assembly, comprising:

the leakage detector is used for being connected with the gas ejector pipe assembly;

a first plugging head;

the pressing module comprises a first driving mechanism and a pressing head connected with the first driving mechanism, and the pressing head can be driven by the first driving mechanism to press the gas ejector tube assembly on the first plugging head so as to realize that the first plugging head at least plugs a nozzle on a first nozzle section of the gas ejector tube assembly;

and the blocking module comprises a third driving mechanism and a second blocking head connected with the third driving mechanism, and the second blocking head can be driven by the third driving mechanism to move to a nozzle for blocking a second spray pipe section of the gas spray pipe assembly.

Compared with the background art, the air tightness detection device for the jet pipe assembly has the advantages that: the utility model discloses an air tightness detection device for jet-propelled pipe assembly, when the valve leakproofness of needs to jet-propelled pipe assembly detects, the interior hourglass of jet-propelled pipe assembly detects promptly, the valve outage, jet-propelled pipe assembly second spouts the pipeline section and closes, jet-propelled pipe assembly is compressed tightly on first shutoff head thereby spout the nozzle shutoff of pipeline section with the first of jet-propelled pipe assembly, or, jet-propelled pipe assembly is compressed tightly on first shutoff head thereby spout the nozzle of pipeline section with the first of jet-propelled pipe assembly and spout the partial nozzle shutoff of pipeline section with the second of jet-propelled pipe assembly, the second of jet-propelled pipe assembly spouts the pipeline section has at least a nozzle to expose and not blocked, the lateral leakage appearance is inflated to jet-propelled pipe assembly and is pressurized to test pressure, pressurize for a period of time, if the valve leakproofness of jet-propelled pipe assembly is poor, atmospheric pressure reveals through the nozzle that exposes, therefore can learn the valve leakproofness of jet-propelled pipe assembly through observing the pressure change in the jet-propelled pipe assembly, accomplish the interior hourglass detection of jet-propelled pipe assembly; when the sealing performance of the sealing plug cover on the outer side of the jet pipe assembly and the sealing performance of the shell need to be detected, namely the outer leakage detection of the jet pipe assembly is carried out, the valve is powered on, the second jet pipe section of the jet pipe assembly is closed, the jet pipe assembly is tightly pressed on the first plugging head so as to plug the nozzle of the first jet pipe section of the jet pipe assembly, meanwhile, the third driving mechanism drives the second plugging head to plug the nozzle exposed out of the second jet pipe section, all nozzles of the jet pipe assembly are plugged, the side leakage instrument inflates and pressurizes the jet pipe assembly to a test pressure, the pressure is maintained for a period of time, if the sealing plug cover on the outer side of the jet pipe assembly or the sealing performance of the shell is poor, the air pressure leaks through the exposed point, the sealing performance of the sealing plug cover on the outer side of the jet pipe assembly can be known by observing the pressure change in the jet pipe assembly, and the outer leakage detection of the jet pipe assembly is completed; through four cooperation uses of appearance, first shutoff head, compress tightly module and shutoff module of leaking in can realizing carrying out jet-propelled pipe assembly and leak or leak outward and detect, owing to only need dispose one appearance of leaking and can realize the interior hourglass of jet-propelled pipe assembly and leak the detection function outward, the cost is reduced, whole testing process only needs to carry out a clamping to jet-propelled pipe assembly moreover, the clamping number of times is few, and the clamping is convenient, can improve detection efficiency.

In one embodiment, the leakage detector further comprises a connecting module, the connecting module comprises a second driving mechanism and an air inlet joint connected with the second driving mechanism, an air inlet of the air inlet joint is used for being in sealing connection with an air outlet of the leakage detector, an air outlet of the air inlet joint is opposite to an air inlet of the jet pipe assembly, and the second driving mechanism can drive the air inlet joint to enable the air outlet of the air inlet joint to be tightly attached to the air inlet of the jet pipe assembly in a sealing connection mode.

In one embodiment, the method further comprises the following steps:

the mounting seat comprises a first mounting plate, a second mounting plate connected with the first mounting plate and arranged above the first mounting plate, and a third mounting plate connected with the first mounting plate and arranged below the first mounting plate;

the first plugging head is arranged on the top surface of the first mounting plate, the compression module and the connection module are both arranged on the second mounting plate, and the plugging module is arranged on the third mounting plate;

and the first mounting plate is provided with an avoidance port which runs through the upper end and the lower end of the first mounting plate and can be penetrated by the second plugging head.

In one embodiment, the first plugging head comprises a first support seat and a first flexible sealing gasket which is arranged on the first support seat and used for plugging at least a nozzle on the first spray pipe section.

In one embodiment, the first supporting seat comprises a first supporting part and a first limiting part, the first flexible sealing gasket is arranged on a first side of the top surface of the first supporting part, the first limiting part is arranged on a second side of the top surface of the first supporting part, and the first limiting part is used for abutting against the jet pipe assembly when the first flexible sealing gasket seals a nozzle on the first jet pipe section so as to prevent the jet pipe assembly from toppling.

In one embodiment, a first clamping groove is formed between the first limiting part and the second side of the top surface of the first supporting part, and the first flexible sealing gasket is partially inserted into the first clamping groove.

In one embodiment, the second blocking head comprises a second supporting seat connected with the third driving mechanism and a second flexible sealing gasket arranged on the second supporting seat and used for blocking a nozzle on the second spray pipe section.

In one embodiment, the second support seat comprises a second support part and a second limiting part, the second flexible sealing gasket is arranged on the first side of the top surface of the second support part, the second limiting part is arranged on the second side of the top surface of the second support part, and the second limiting part is used for abutting against the gas ejector assembly when the second flexible sealing gasket seals the nozzle on the second gas ejector section.

In one embodiment, a second clamping groove is formed between the second limiting portion and the second side of the top surface of the second supporting portion, and the second flexible sealing gasket is partially inserted into the second clamping groove.

In one embodiment, the method further comprises the following steps:

and the controller is used for controlling the leak detector, the first driving mechanism, the second driving mechanism and the third driving mechanism to act.

Drawings

Fig. 1 is a schematic structural view of an air tightness detecting device for a gas lance assembly according to the present invention at a first viewing angle;

fig. 2 is a schematic structural view of the air tightness detecting device for the gas lance assembly according to the present invention at a second viewing angle;

fig. 3 is a schematic structural view illustrating the clamping of the gas ejector assembly to the gas tightness detecting device for a gas ejector assembly of the present invention;

fig. 4 is an exploded view of a first plugging head according to the present invention;

fig. 5 is an exploded view of a second plugging head according to the present invention;

FIG. 6 is a schematic structural view of a gas lance assembly.

Description of reference numerals:

10. a first plugging head; 11. a first support base; 111. a first support section; 112. a first limiting part; 1121. a first card slot; 12. a first flexible gasket; 20. a compression module; 21. a first drive mechanism; 22. a pressure head; 30. a connection module; 31. a second drive mechanism; 32. an air inlet joint; 40. a plugging module; 41. a third drive mechanism; 42. a second plugging head; 421. a second support seat; 4211. a second support portion; 4212. a second limiting part; 42121. a second card slot; 422. a second flexible gasket; 50. a mounting seat; 51. a first mounting plate; 511. avoiding the mouth; 52. a second mounting plate; 53. a third mounting plate; 100. a gas lance assembly; 101. a first nozzle section; 102. a second nozzle section; 103. an air intake pipe section; 1031. an air inlet; 104. and (4) a valve.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, when referring to the orientation or positional relationship indicated in the drawings, are used for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present application.

The appearances of the terms first and second, if any, are only for descriptive purposes and not intended to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1-3, in order to provide an air tightness detecting device for an air nozzle assembly according to a preferred embodiment of the present invention, referring to fig. 6, in order to provide an air nozzle assembly 100 of the present invention, the air nozzle assembly 100 includes a first nozzle segment 101, a second nozzle segment 102, an air inlet segment 103 and a valve 104, the air inlet segment 103 is provided with an air inlet 1031, the air inlet 1031 is communicated with a nozzle on the first nozzle segment 101 and a nozzle on the second nozzle segment 102, and the valve 104 is disposed between the air inlet segment 103 and the second nozzle segment 102 and is used for controlling the second nozzle segment 102 to open or close.

Referring to fig. 1 to 3, the airtightness detection apparatus for a gas lance assembly according to the present invention comprises: a leak detector (not shown) for connection to the gas lance assembly 100; a first plugging head 10; the pressing module 20 comprises a first driving mechanism 21 and a pressing head 22 connected with the first driving mechanism 21, and the pressing head 22 can be driven by the first driving mechanism 21 to press the gas ejector assembly 100 onto the first plugging head 10 so as to realize that the first plugging head 10 at least plugs the nozzle on the first ejector section 101 of the gas ejector assembly 100, so that the nozzle on the first ejector section 101 can be reliably sealed to prevent gas leakage; the plugging module 40 includes a third driving mechanism 41 and a second plugging head 42 connected to the third driving mechanism 41, and the second plugging head 42 can be driven by the third driving mechanism 41 to move to plug the nozzle of the second nozzle segment 102 of the gas lance assembly 100.

It should be noted that the operating principle of the side leakage meter is to output compressed air to the jet tube assembly 100 after starting, then to maintain pressure, the leak detector displays pressure readings, and the air tightness of the jet tube assembly 100 is determined by comparing the pressure readings, and the structure belongs to the existing structure, and therefore is not described herein again.

The utility model discloses an air tightness detection device for jet-propelled pipe assembly, when needing to detect the valve 104 leakproofness of jet-propelled pipe assembly 100, the inner leakage of jet-propelled pipe assembly 100 detects promptly, valve 104 cuts off the power supply, jet-propelled pipe assembly 100 second jet-propelled pipe section 102 is closed, jet-propelled pipe assembly 100 is compressed tightly on first shutoff head 10 thereby the nozzle shutoff of the first jet-propelled pipe section 101 of jet-propelled pipe assembly 100, or, jet-propelled pipe assembly 100 is compressed tightly on first shutoff head 10 thereby the nozzle of the first jet-propelled pipe section 101 of jet-propelled pipe assembly 100 and the partial nozzle shutoff of the second jet-propelled pipe section 102 of jet-propelled pipe assembly 100, jet-propelled pipe assembly 100 second jet-propelled pipe section 102 has at least a nozzle to expose and has not been blocked, the lateral leakage appearance inflates the pressurization to jet-propelled pipe assembly 100 to test pressure, the pressurize through a period of time, if the valve 104 leakproofness of jet-propelled pipe assembly 100 is poor, atmospheric pressure is revealed through the nozzle that exposes, therefore can learn the valve 104 leakproofness of jet-propelled pipe assembly 100 through observing the pressure change in jet-propelled pipe assembly 100, the leak tightness of detection of jet-propelled pipe assembly is detected; when the sealing performance of the sealing cover and the shell on the outer side of the gas ejector tube assembly 100 needs to be detected, namely the leakage detection of the gas ejector tube assembly 100 is finished, the valve 104 is electrified, the second ejector tube section 102 of the gas ejector tube assembly 100 is closed, the gas ejector tube assembly 100 is pressed on the first plugging head 10 so as to plug the nozzle of the first ejector tube section 101 of the gas ejector tube assembly 100, meanwhile, the third driving mechanism 41 drives the second plugging head 42 to plug the exposed nozzle of the second ejector tube section 102, all nozzles of the gas ejector tube assembly 100 are plugged, the side leakage instrument inflates and pressurizes the gas ejector tube assembly 100 to a test pressure, the pressure is maintained for a period of time, if the sealing performance of the sealing cover or the shell on the outer side of the gas ejector tube assembly 100 is poor, the gas pressure leaks through an exposed point, the sealing performance of the sealing cover on the outer side of the gas ejector tube assembly 100 can be known by observing the pressure change in the gas ejector tube assembly 100, and the leakage detection of the gas ejector tube assembly 100 is finished; through leak hunting appearance, first shutoff head 10, compress tightly module 20 and shutoff module 40 four person's cooperation use can realize leaking in going on or leaking outward and detect jet-propelled pipe assembly 100, owing to only need dispose a leak hunting appearance and can realize jet-propelled pipe assembly 100 leak in and leak the detection function outward, the cost is reduced, and whole testing process only needs to carry out a clamping to jet-propelled pipe assembly 100 in addition, the clamping number of times is few, and the clamping is convenient, can improve detection efficiency.

Specifically, for conveniently connecting the leak detector and the gas ejector assembly 100, the gas tightness detecting device for the gas ejector assembly further comprises a connecting module 30, the connecting module 30 comprises a second driving mechanism 31 and a gas inlet connector 32 connected with the second driving mechanism 31, a gas inlet 1031 of the gas inlet connector 32 is used for being connected with a gas outlet of the leak detector in a sealing manner, a gas outlet of the gas inlet connector 32 is opposite to the gas inlet 1031 of the gas ejector assembly 100, and the second driving mechanism 31 can drive the gas inlet connector 32 to enable the gas outlet of the gas inlet connector 32 to be tightly attached to and connected with the gas inlet 1031 of the gas ejector assembly 100 in a sealing manner.

Referring to fig. 1 to 3, in order to make the structure more compact, the airtightness detection apparatus for a gas lance assembly further comprises: a mounting seat 50, the mounting seat 50 including a first mounting plate 51, a second mounting plate 52 connected to the first mounting plate 51 and disposed above the first mounting plate 51, and a third mounting plate 53 connected to the first mounting plate 51 and disposed below the first mounting plate 51; the first plugging head 10 is arranged on the top surface of the first mounting plate 51, the compression module 20 and the connection module 30 are arranged on the second mounting plate 52, and the plugging module 40 is arranged on the third mounting plate 53, namely, the first plugging head 10, the compression module 20, the connection module 30 and the plugging module 40 are reasonably arranged in the height direction of the mounting seat 50, so that the transverse occupied space is reduced, the structure is more compact, the occupied area is smaller, and meanwhile, the clamping of the gas ejector pipe assembly 100 is facilitated.

Referring to fig. 1 to 3, in the present embodiment, the first mounting plate 51 is provided with an avoidance hole 511 penetrating through the upper end and the lower end of the first mounting plate 51 and allowing the second blocking head 42 to pass through, and the avoidance hole 511 is configured to avoid excessively reducing the volume of the first mounting plate 51, maximize the contact area between the first mounting plate 51 and the second mounting plate 52, and ensure reliable connection between the first mounting plate 51 and the second mounting plate, thereby improving the structural stability of the whole air tightness detection device for the air ejector tube assembly.

In order to realize automatic air tightness detection, in this embodiment, the air tightness detection device for a gas nozzle assembly further includes a controller (not shown in the figure), and the controller is configured to control the operation of the leak detector, the first driving mechanism 21, the second driving mechanism 31, and the third driving mechanism 41, so that the leak detector, the first driving mechanism 21, the second driving mechanism 31, and the third driving mechanism 41 can perform corresponding operations according to a control command preset in the controller.

Illustratively, the controller may be a central processing unit, a microprocessor, a microcontroller, a programmable logic device, or any combination thereof. The controller may also be other devices with processing functions, such as circuits and devices, which are not limited in this application.

Specifically, in this embodiment, the controller is further configured to control the first driving mechanism 21, the second driving mechanism 31, and the third driving mechanism 41 to reset according to the first qualified detection information and the second qualified detection information of the leak detector, that is, only when the inner leak detection and the outer leak detection are both qualified, the first driving mechanism 21, the second driving mechanism 31, and the third driving mechanism 41 are automatically reset, otherwise, the user needs to manually operate a corresponding key on the controller to drive the first driving mechanism 21, the second driving mechanism 31, and the third driving mechanism 41 to reset.

Specifically, in the present embodiment, the first driving mechanism 21, the second driving mechanism 31 and the third driving mechanism 41 are all cylinders, which is simple and practical in structure, convenient for maintenance and repair, and has excellent operational reliability, and of course, in other embodiments, all of the first driving mechanism 21, the second driving mechanism 31 and the third driving mechanism 41 may be hydraulic cylinders, electric cylinders, and the like.

Referring to fig. 1 to 4, in the present embodiment, the first plugging head 10 includes a first supporting seat 11 and a first flexible sealing gasket 12 disposed on the first supporting seat 11 and used for plugging at least a nozzle on the first nozzle segment 101, so that the first supporting seat 11 is used to provide stable support for at least the first nozzle segment 101 of the gas ejector assembly 100, thereby realizing reliable clamping of the first nozzle segment 101 when the first plugging head is used in combination with the compression module 20, and meanwhile, the first flexible sealing gasket 12 is used to reliably seal the nozzle on the first nozzle segment 101, so as to prevent gas leakage and avoid crushing the nozzle end surface on the first nozzle segment 101.

With continued reference to fig. 1 to 4, the first supporting seat 11 includes a first supporting portion 111 and a first limiting portion 112, a first flexible sealing gasket 12 is disposed on a first side of a top surface of the first supporting portion 111, the first limiting portion 112 is disposed on a second side of the top surface of the first supporting portion 111, and the first limiting portion 112 is configured to abut against the gas nozzle assembly 100 when the first flexible sealing gasket 12 seals the nozzle on the first gas nozzle segment 101, so as to prevent the gas nozzle assembly 100 from tilting, and ensure reliable sealing of the nozzle on the first gas nozzle segment 101.

Referring to fig. 4, a first clamping groove 1121 is formed between the first limiting portion 112 and the second side of the top surface of the first supporting portion 111, and the first flexible sealing gasket 12 is partially inserted into the first clamping groove 1121 to position the first flexible sealing gasket 12, so that the first flexible sealing gasket 12 is reliably arranged at a set position on the top surface of the first supporting portion 111, and reliable sealing of a nozzle on the first nozzle section 101 is ensured.

Similarly, referring to fig. 1-3 and fig. 5, in this embodiment, the second plugging head 42 includes a second supporting seat 421 connected to the third driving mechanism 41 and a second flexible sealing gasket 422 disposed on the second supporting seat 421 and used for plugging the nozzle on the second nozzle segment 102, so that the second supporting seat 421 provides a stable support for the second nozzle segment 102 of the gas nozzle assembly 100, thereby enabling reliable clamping of the second nozzle segment 102 when the second supporting seat is used in combination with the compression module 20, and at the same time, the second flexible sealing gasket 422 is used to reliably seal the nozzle on the second nozzle segment 102, so as to prevent gas leakage and avoid crushing the nozzle end surface on the second nozzle segment 102.

With continued reference to fig. 1-3 and 5, the second support seat 421 includes a second support portion 4211 and a second position-limiting portion 4212, a second flexible sealing gasket 422 is disposed on a first side of a top surface of the second support portion 4211, the second position-limiting portion 4212 is disposed on a second side of the top surface of the second support portion 4211, and the second position-limiting portion 4212 is configured to abut against the gas nozzle assembly 100 when the second flexible sealing gasket 422 seals a nozzle on the second gas nozzle segment 102, so as to ensure reliable sealing of the nozzle on the second gas nozzle segment 102.

Referring to fig. 5, a second clamping groove 42121 is formed between the second limiting portion 4212 and the second side of the top surface of the second supporting portion 4211, the second flexible sealing gasket 422 is partially inserted into the second clamping groove 42121 to position the second flexible sealing gasket 422, so that the second flexible sealing gasket 422 is reliably arranged at a set position on the top surface of the second supporting portion 4211, reliable sealing of a nozzle on the second nozzle segment 102 is ensured, and meanwhile, the second flexible sealing gasket 422 can be conveniently disassembled and assembled, and replacement of the second flexible sealing gasket 422 is facilitated.

Referring to fig. 1-3, in the present embodiment, two hold-down modules 20 are provided, with the two hold-down modules 20 being spaced apart to apply a more uniform force to the gas lance assembly 100 to ensure reliable clamping of the gas lance assembly 100 while avoiding crushing of the gas lance assembly 100.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The details of the foregoing embodiments are merely representative of several embodiments of the present invention, which are described in more detail and detail, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A gas tightness detection device for a gas lance assembly, comprising:

the leakage detector is used for being connected with the gas ejector pipe assembly (100);

a first stopper (10);

the pressing module (20) comprises a first driving mechanism (21) and a pressing head (22) connected with the first driving mechanism (21), and the pressing head (22) can be driven by the first driving mechanism (21) to press the gas ejector tube assembly (100) on the first blocking head (10) so as to realize that the first blocking head (10) at least blocks a nozzle on a first ejector tube section (101) of the gas ejector tube assembly (100);

the blocking module (40) comprises a third driving mechanism (41) and a second blocking head (42) connected with the third driving mechanism (41), and the second blocking head (42) can be driven by the third driving mechanism (41) to move to block a nozzle of a second spray pipe section (102) of the gas spray pipe assembly (100).

2. The airtightness detection apparatus for a gas ejector tube assembly according to claim 1, further comprising a connection module (30), wherein the connection module (30) includes a second driving mechanism (31) and a gas inlet connector (32) connected to the second driving mechanism (31), a gas inlet of the gas inlet connector (32) is configured to be in sealing connection with a gas outlet of the leak detector, a gas outlet of the gas inlet connector (32) is opposite to a gas inlet of the gas ejector tube assembly (100), and the second driving mechanism (31) can drive the gas inlet connector (32) to enable the gas outlet of the gas inlet connector (32) to be in tight sealing connection with the gas inlet of the gas ejector tube assembly (100).

3. The apparatus for detecting the hermeticity of a gas lance assembly as set forth in claim 2, further comprising:

the mounting seat (50) comprises a first mounting plate (51), a second mounting plate (52) connected with the first mounting plate (51) and arranged above the first mounting plate (51), and a third mounting plate (53) connected with the first mounting plate (51) and arranged below the first mounting plate (51);

the first plugging head (10) is arranged on the top surface of the first mounting plate (51), the compression module (20) and the connection module (30) are arranged on the second mounting plate (52), and the plugging module (40) is arranged on the third mounting plate (53);

the first mounting plate (51) is provided with an avoidance port (511) which penetrates through the upper end and the lower end of the first mounting plate and can be used for the second plugging head (42) to pass through.

4. The gas tightness detection device for a gas lance assembly according to claim 1, characterized in that the first stopper head (10) comprises a first support seat (11) and a first flexible sealing gasket (12) provided on the first support seat (11) and adapted to at least block the nozzles on the first lance section (101).

5. The airtightness detection apparatus for the gas lance assembly according to claim 4, wherein the first support seat (11) includes a first support portion (111) and a first limit portion (112), the first flexible sealing gasket (12) is disposed on a first side of a top surface of the first support portion (111), the first limit portion (112) is disposed on a second side of the top surface of the first support portion (111), and the first limit portion (112) is configured to abut against the gas lance assembly (100) when the first flexible sealing gasket (12) blocks a nozzle on the first gas lance section (101), so as to prevent the gas lance assembly (100) from falling.

6. The air tightness detection device for a gas lance assembly according to claim 5, wherein a first locking groove (1121) is formed between the first limiting portion (112) and the second side of the top surface of the first supporting portion (111), and the first flexible sealing gasket (12) is partially inserted into the first locking groove (1121).

7. The gas tightness detection device for a gas lance assembly according to claim 1, wherein the second plugging head (42) comprises a second support (421) connected to the third actuating mechanism (41) and a second flexible gasket (422) provided on the second support (421) for plugging a nozzle on the second lance section (102).

8. The gas tightness detection device for a gas lance assembly according to claim 7, wherein the second support seat (421) comprises a second support portion (4211) and a second limit portion (4212), the second flexible sealing gasket (422) is disposed on a first side of a top surface of the second support portion (4211), the second limit portion (4212) is disposed on a second side of the top surface of the second support portion (4211), and the second limit portion (4212) is configured to abut against the gas lance assembly (100) when the second flexible sealing gasket (422) blocks the nozzle on the second gas lance section (102).

9. The gas tightness detection device for a gas lance assembly according to claim 8, wherein a second locking groove (42121) is provided between the second limit portion (4212) and a second side of the top surface of the second support portion (4211), and the second flexible sealing gasket (422) is partially inserted into the second locking groove (42121).

10. A gas tightness detection device for a gas lance assembly according to any one of claims 2 to 3, further comprising:

and the controller is used for controlling the leak detector, the first driving mechanism (21), the second driving mechanism (31) and the third driving mechanism (41) to act.

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