CN219414409U - Adapter device - Google Patents

Abstract

The utility model discloses an adapter device, which comprises a mounting ring, wherein the mounting ring is provided with a positioning plug-in and a plurality of elastic hook parts which are distributed at intervals; the connecting pipe penetrates through the mounting ring, the lower end of the connecting pipe is provided with a lantern ring part in a forming mode, a gas channel is formed in the connecting pipe, the upper part of the gas channel is connected with a one-way valve assembly in a sealing mode, and when the lantern ring part is sleeved on the exhaust valve assembly, the exhaust valve assembly is opened and communicated with the gas channel; the outer peripheral wall of the collar part is provided with a convex part, when the clamping type furnace gas tank is applied to other cookers, the exhaust valve component of the clamping type furnace gas tank is inserted into the collar part, the positioning plug-in is inserted into the notch part of the gas tank main body, the collar part can rotate relative to the mounting ring to enable the convex part to be abutted to the back of the elastic hook part, and then the elastic hook part is driven to be buckled on the lower edge of the inner ring of the circular ring part of the gas tank main body, so that the clamping type furnace gas tank and the conversion connector device are mounted, the use is very convenient, and the conversion connector device is simple in structure and low in production and assembly cost.

Description

Adapter device

Technical Field

The present utility model relates to a switching device.

Background

In daily life, field cooking activities are becoming popular, and in order to meet the needs of people, various portable cookers are appeared in the market, and accordingly, a gas tank is required to be matched. The portable cooker is provided with a fire gun and other cookers besides the card type cooker, and a special gas tank for the card type cooker exists in the market, but when the card type cooker gas tank is applied to other portable cookers, an adapter device is required to be installed, and the common adapter device has the defects of various parts, difficult assembly and production, inconvenient use and the like.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the adapter device which has simple structure, lower production and assembly cost and convenient use.

The utility model relates to a conversion joint device, which comprises: the mounting ring is provided with a plurality of elastic hook parts which are distributed at intervals around the circumference of the central line of the mounting ring, and the mounting ring is provided with positioning inserts which are positioned at the periphery of the elastic hook parts and extend downwards, and the positioning inserts are used for being inserted into notch parts of the gas tank main body; the connecting pipe penetrates through the middle part of the mounting ring, the lower end of the connecting pipe is provided with a lantern ring part which can be sleeved outside the exhaust valve assembly of the gas tank main body, the inside of the connecting pipe is provided with a gas channel penetrating from bottom to top, the upper part of the gas channel is connected with a one-way valve assembly in a sealing way, and when the lantern ring part is sleeved on the exhaust valve assembly, the exhaust valve assembly is opened and communicated with the lower part of the gas channel; the outer peripheral wall of the collar part is provided with a convex part, and the collar part can rotate relative to the mounting ring so that the convex part is abutted against the back of the elastic hook part, and then the elastic hook part is driven to be buckled on the lower edge of the inner ring of the circular ring part of the gas tank main body.

According to the embodiment of the utility model, the adapter device has at least the following beneficial effects:

when the clamping type furnace gas tank is applied to other cookers, the exhaust valve component of the clamping type furnace gas tank is inserted into the lantern ring part, the positioning plug-in is inserted into the notch part of the gas tank main body, and then the connecting pipe is rotated to enable the convex part to abut against the back of the elastic hook part to be buckled on the lower edge of the inner ring of the circular ring part of the gas tank main body, so that the clamping type furnace gas tank and the conversion connector device are mounted, the use is very convenient, and the conversion connector device is simple in structure and low in production and assembly cost.

In some embodiments of the present utility model, a plurality of the protruding portions are disposed at intervals around the axial direction of the connection pipe, a recess is formed between two adjacent protruding portions, the elastic hook portion abuts against the protruding portion to enable the elastic hook portion to be buckled on the lower edge of the inner ring of the circular ring portion of the gas tank main body, and the elastic hook portion abuts against the recess to enable the elastic hook portion to be separated from the gas tank main body.

In some embodiments of the present utility model, a shaft hole is provided in the middle of the mounting ring, the connecting pipe penetrates upward, the collar portion protrudes outward along the radial direction of the shaft hole, the upper portion of the connecting pipe is connected with a rotating cover capable of rotating relative to the mounting ring, and the mounting ring is clamped between the rotating cover and the collar portion.

In some embodiments of the present utility model, a through hole from which the upper portion of the connection pipe extends is formed in the middle of the screw cap, a transmission structure capable of driving the screw cap and the connection pipe to rotate together is arranged between the screw cap and the connection pipe, an arc guide groove is formed around the center of the installation ring, and a rotation guide piece matched with the arc guide groove is arranged in a downward extending manner of the screw cap.

In some embodiments of the present utility model, the transmission structure includes a transmission block protruding along an outer circumferential wall of the connection pipe and a sink groove provided at an inner top wall of the screw cap for embedding the transmission block, and the rotation guide member includes a lower cantilever penetrating downward through the circular arc guide groove and a unhooking prevention hook formed at a lower end of the lower cantilever, and the unhooking prevention hook abuts against a lower surface of the mounting ring to prevent the transmission block from being separated from the sink groove and to keep a lower end surface of the screw cap abutting against an upper end surface of the mounting ring.

In some embodiments of the present utility model, the plurality of rotation guide members and the plurality of circular arc guide grooves are all provided, the plurality of circular arc guide grooves and the plurality of rotation guide members are all uniformly and circumferentially distributed around the center line of the mounting ring, and when the lower cantilever abuts against one end of the circular arc guide grooves, the elastic hook portion is buckled on the lower edge of the inner ring of the circular ring portion of the gas tank main body, or the elastic hook portion is separated from the gas tank main body.

In some embodiments of the present utility model, the gas channel includes a lower wide-mouth channel, a narrow-mouth channel and an upper wide-mouth channel sequentially connected from bottom to top, a first step is formed between the lower wide-mouth channel and the narrow-mouth channel, a second step is formed between the upper wide-mouth channel and the narrow-mouth channel, a first sealing ring capable of being connected to the peripheral wall of the exhaust valve assembly in a sealing manner is disposed in the lower wide-mouth channel, the exhaust valve assembly can be propped against the first step to be in an open state, and the one-way valve assembly is disposed in the upper wide-mouth channel.

In some embodiments of the present utility model, the check valve assembly includes a spring, a valve needle and an air outlet pipe, the valve needle is sleeved with a second sealing ring, the air outlet pipe is fixedly arranged at the top of the connecting pipe, the valve needle is arranged on the air outlet pipe in a penetrating manner, and two ends of the spring are respectively abutted against the second step position and the valve needle so that the second sealing ring seals a gap between the valve needle and the air outlet pipe.

In some embodiments of the utility model, an annular mounting groove for accommodating the air outlet pipe is formed at the upper part of the connecting pipe, and a riveting anti-drop flange for preventing the air outlet pipe from being separated from the connecting pipe is formed at the upper end surface of the connecting pipe.

In some embodiments of the utility model, a third sealing ring is arranged between the outer peripheral wall of the air outlet pipe and the inner peripheral wall of the annular mounting groove.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic exploded view of one embodiment of a crossover connection device of the present utility model;

FIG. 2 is a schematic internal cross-sectional view of the embodiment of FIG. 1;

fig. 3 is a schematic view of the structure of the adapter device of the embodiment of fig. 1 mounted on a cartridge burner cylinder and a valve body of an external cooker.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The clamping type furnace gas tank in the prior art comprises a gas tank main body 10, a circular ring part 13 is arranged at the top of the gas tank main body 10, a notch part 11 is arranged at the edge of the peripheral wall of the circular ring part 13, and a vent valve assembly 12 is arranged at the middle position of the circular ring part 13 of the gas tank main body 10.

Referring to fig. 1 to 3, an adapter device of the present utility model includes: the mounting ring 100, the mounting ring 100 is provided with a plurality of elastic hook parts 110 at intervals around the circumference of the central line, the mounting ring 100 is provided with positioning inserts 120 which are positioned at the periphery of the elastic hook parts 110 and extend downwards, and the positioning inserts 120 are used for being inserted into the notch parts 11 of the gas tank main body 10; the connecting pipe 200 is penetrated in the middle of the mounting ring 100, a collar part 210 which can be sleeved outside the exhaust valve assembly 12 of the gas tank main body 10 is formed at the lower end of the connecting pipe 200, a gas channel 230 penetrating from bottom to top is formed inside the connecting pipe 200, a one-way valve assembly 500 is connected to the upper part of the gas channel 230 in a sealing way, and when the collar part 210 is sleeved on the exhaust valve assembly 12, the exhaust valve assembly 12 is opened and communicated with the lower part of the gas channel 230; the outer peripheral wall of the collar portion 210 is provided with a protrusion 211, and the collar portion 210 can rotate relative to the mounting ring 100 to enable the protrusion 211 to abut against the back of the elastic hook portion 110, so as to drive the elastic hook portion 110 to be buckled with the lower edge of the inner ring of the circular ring portion 13 of the gas tank main body 10.

Referring to fig. 3, when the cartridge type furnace gas tank is applied to other cookers, the vent valve assembly 12 of the cartridge type furnace gas tank is inserted into the collar portion 210 while the positioning insert 120 is inserted into the notch portion 11 of the gas tank body 10, referring to fig. 2 and 3, and then the connection pipe 200 is rotated so that the protrusion 211 is fastened to the lower edge of the inner ring of the circular ring portion 13 of the gas tank body 10 against the back of the elastic hook portion 110, thereby realizing the installation of the cartridge type furnace gas tank and the adapter device, which is very convenient to use, and which has a simple structure and low production and assembly costs.

In some embodiments of the present utility model, referring to fig. 1, a plurality of protruding portions 211 are spaced around the axis of the connection pipe 200, a recess 212 is formed between two adjacent protruding portions 211, the elastic hook 110 abuts against the protruding portion 211 to make the elastic hook 110 engage with the lower edge of the inner ring of the circular ring portion 13 of the gas tank body 10, and the elastic hook 110 abuts against the recess 212 to separate the elastic hook 110 from the gas tank body 10. In the present embodiment, the elastic hook 110 is provided in plurality, and the plurality of elastic hooks 110 are respectively in one-to-one correspondence with the plurality of concave portions 212 and the plurality of convex portions 211, so that the cassette gas canister and the adapter device are stably connected. It can be appreciated that when the collar portion 210 rotates by a certain angle, the protrusions 211 abut against the back of the corresponding elastic hook portion 110 to make the elastic hook portion 110 snap-fit to the lower edge of the inner ring of the circular ring portion 13 of the gas tank main body 10, thereby realizing the installation between the adapter device and the cassette furnace gas tank; when the collar portion 210 reversely rotates by the same angle, the concave portion 212 is aligned with the back of the corresponding elastic hook portion 110, and the elastic hook portion 110 enters the concave portion 212 and is separated from the circular ring portion 13 of the gas tank main body 10, so that the disassembly between the adapter device and the clamping type furnace gas tank is realized, and the disassembly and the assembly are very convenient.

In some embodiments of the present utility model, referring to fig. 1 and 2, a shaft hole 130 through which the connection pipe 200 passes upward is provided in the middle of the installation ring 100, a collar portion 210 is protruded outward in the radial direction of the shaft hole 130, a screw cap 300 rotatable with respect to the installation ring 100 is connected to the upper portion of the connection pipe 200, and the installation ring 100 is interposed between the screw cap 300 and the collar portion 210. Wherein, the screw cap 300 and the connection pipe 200 are rotated together, so that a user can conveniently disassemble and assemble the adapter device by hand, and the screw cap 300 and the collar part 210 limit the height position of the installation ring 100 together, thereby preventing the installation ring 100 from jumping during the disassembly and installation process.

Referring to fig. 1, in some embodiments of the present utility model, a through hole 310 is formed in the middle of the screw cap 300 for the upper portion of the connection pipe 200 to protrude, a transmission structure capable of driving the screw cap 300 and the connection pipe 200 to rotate together is provided between them, the installation ring 100 is provided with an arc guide groove 140 around its center, and the screw cap 300 is provided with a rotation guide 320 engaged with the arc guide groove 140 to extend downward. When the screw cap 300 rotates, the transmission structure drives the connection pipe 200 to rotate together with the installation ring 100, the rotation guide member 320 moves in the circular arc guide groove 140, guiding renting is performed on the relative rotation between the screw cap 300 and the installation ring 100, and the screw cap 300 is prevented from being greatly deformed or tilted to affect the installation and the disassembly of the adapter device.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the driving structure includes a driving block 220 provided convexly along the outer circumferential wall of the connection pipe 200 and a sink 330 provided at the inner top wall of the cap 300 for receiving the driving block 220, and the rotation guide 320 includes a lower cantilever 321 downwardly penetrating the circular arc guide groove 140 and a drop-preventing hook 322 formed at the lower end of the lower cantilever 321, the drop-preventing hook 322 being abutted against the lower surface of the mounting ring 100 to prevent the driving block 220 from being dropped out of the sink 330 and to maintain the lower end surface of the cap 300 abutted against the upper end surface of the mounting ring 100. In this embodiment, the lower cantilever 321, the anti-falling hook 322 and the cap screwing 300 are of an integrated plastic structure, after the lower cantilever 321 passes through the circular arc guiding groove 140, the anti-falling hook 322 hooks the lower surface of the mounting ring 100, the lower cantilever 321 abuts against the inner side wall of the circular arc guiding groove 140, the cap screwing 300 and the connecting pipe 200 are assembled by matching the rotating guide piece 320 and the circular arc guiding groove 140, and the effect of rotating guiding is achieved. In addition, when the above adapter device is assembled, the mounting ring 100 is first passed through the connecting pipe 200, then the screw cap 300 is passed through the upper portion of the connecting pipe 200, and the sinking groove 330 is aligned with the driving block 220 to be pressed in until the anti-falling hook 322 hooks the lower surface of the mounting ring 100, so that other fastening structures are avoided, the cost is lower, and the assembly is convenient.

Referring to fig. 1 to 3, in some embodiments of the present utility model, in order to further stabilize the relative movement between the screw cap 300 and the screw cap 300, the rotation guide 320 and the circular arc guide groove 140 are each provided in plurality, and the plurality of circular arc guide grooves 140 and the plurality of rotation guide 320 are each uniformly and circumferentially distributed at intervals around the center line of the mounting ring 100. When the lower cantilever 321 abuts against one end of the circular arc guide groove 140, the elastic hook 110 is buckled on the lower edge of the inner ring of the circular ring portion 13 of the gas tank main body 10, or the elastic hook 110 is separated from the gas tank main body 10; it should be noted that, the rotary guide 320 moves to the two ends of the circular arc guide groove 140 to correspond to the two states that the adapter device is locked to the cassette gas canister and the adapter device is separated from the cassette gas canister, respectively.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the gas channel 230 includes a lower wide-mouth channel 231, a narrow-mouth channel 232, and an upper wide-mouth channel 233 sequentially connected from bottom to top, a first step is formed between the lower wide-mouth channel 231 and the narrow-mouth channel 232, a second step is formed between the upper wide-mouth channel 233 and the narrow-mouth channel 232, a first sealing ring 410 capable of being connected to the outer peripheral wall of the exhaust valve assembly 12 in a sealing manner is disposed in the lower wide-mouth channel 231, and the exhaust valve assembly 12 can be in an open state against the first step, and the check valve assembly 500 is disposed in the upper wide-mouth channel 233. It will be appreciated that when the adaptor device is used in conjunction with a cartridge type stove gas canister, the vent valve assembly 12 of the cartridge type stove gas canister is inserted into the lower wide mouth channel 231, while the positioning insert 120 is inserted into the notch portion 11 of the gas canister body 10, the collar portion 210 is rotatable relative to the mounting ring 100 to enable the protrusion 211 to abut against the back of the resilient hook portion 110, the vent valve assembly 12 abuts against the first step position to be in an open state, high pressure gas in the cartridge type stove gas canister enters the upper wide mouth channel 233 through the narrow mouth channel 232, and when the valve body 600 on other cookware is connected, the valve body 600 pushes the one-way valve assembly 500 open, thereby enabling the high pressure gas in the upper wide mouth channel 233 to be passed into the other cookware.

Referring to fig. 2, in some embodiments of the present utility model, the check valve assembly 500 includes a spring 510, a valve needle 520, and an air outlet pipe 530, the valve needle 520 is sleeved with a second sealing ring 420, the air outlet pipe 530 is fixedly arranged at the top of the connection pipe 200, the valve needle 520 is arranged through the air outlet pipe 530, and two ends of the spring 510 respectively abut against the second step and the valve needle 520 so that the second sealing ring 420 seals a gap between the valve needle 520 and the air outlet pipe 530.

In some embodiments of the present utility model, the upper portion of the connection pipe 200 is provided with an annular installation groove for receiving the air outlet pipe 530, and the upper end surface of the connection pipe 200 is formed with a rivet-locking flange 240 for preventing the air outlet pipe 530 from being separated from the connection pipe 200. It should be noted that, after the air outlet pipe 530 is placed in the annular mounting groove, it is supported by the bottom of the annular mounting groove, and the upper end surface of the connecting pipe 200 forms a rivet anti-falling flange 240 by means of downward riveting, so as to fix the position of the air outlet pipe 530 and prevent the air outlet pipe 530 from falling out.

Referring to fig. 2 and 3, in some embodiments of the present utility model, in order to prevent high-pressure gas from leaking from the gap between the outlet pipe 530 and the connection pipe 200, a third sealing ring 430 is provided between the outer circumferential wall of the outlet pipe 530 and the inner circumferential wall of the annular mounting groove. Further, in order to ensure that the valve body 600 on the external cooker pushes up the check valve assembly 500 to maintain airtightness, the inner circumferential wall of the outlet pipe 530 is further provided with a fourth sealing ring 440.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A crossover sub assembly, comprising:

the mounting ring (100), a plurality of elastic hook parts (110) are distributed at intervals around the circumference of the central line of the mounting ring (100), the mounting ring (100) is provided with positioning inserts (120) which are positioned on the periphery of the elastic hook parts (110) and extend downwards, and the positioning inserts (120) are used for being inserted into notch parts (11) of the gas tank main body (10);

the connecting pipe (200) is arranged in the middle of the mounting ring (100) in a penetrating manner, a collar part (210) which can be sleeved outside the exhaust valve assembly (12) of the gas tank main body (10) is formed at the lower end of the connecting pipe (200), a gas channel (230) penetrating from bottom to top is arranged in the connecting pipe (200), a one-way valve assembly (500) is connected to the upper part of the gas channel (230) in a sealing manner, and when the collar part (210) is sleeved on the exhaust valve assembly (12), the exhaust valve assembly (12) is opened and communicated with the lower part of the gas channel (230);

the outer peripheral wall of the collar portion (210) is provided with a protruding portion (211), and the collar portion (210) can rotate relative to the mounting ring (100) so that the protruding portion (211) abuts against the back of the elastic hook portion (110), and then the elastic hook portion (110) is driven to be buckled with the lower edge of the inner ring of the circular ring portion (13) of the gas tank main body (10).

2. A crossover sub assembly according to claim 1, wherein:

the plurality of convex parts (211) are arranged at intervals along the axial direction of the connecting pipe (200), a concave part (212) is formed between two adjacent convex parts (211), the elastic hook part (110) is propped against the convex parts (211) to enable the elastic hook part (110) to be buckled on the lower edge of the inner ring of the circular ring part (13) of the gas tank main body (10), and the elastic hook part (110) is propped against the concave part (212) to enable the elastic hook part (110) to be separated from the gas tank main body (10).

3. A crossover sub assembly according to claim 1, wherein:

the middle part of collar (100) is equipped with supplies connecting pipe (200) upward wears to establish shaft hole (130), lantern ring portion (210) are followed radial outside protrusion setting in shaft hole (130), the upper portion of connecting pipe (200) is connected with can be relative collar (100) pivoted spiral cover (300), collar (100) clamp is located spiral cover (300) with between lantern ring portion (210).

4. A crossover sub assembly according to claim 3, wherein:

the middle part of spiral cover (300) has offered confession the perforation (310) that upper portion of connecting pipe (200) stretched out, spiral cover (300) with be equipped with between connecting pipe (200) and drive the transmission structure of both rotation altogether, collar (100) are provided with circular arc guide way (140) around its central line, spiral cover (300) downwardly extending be provided with circular arc guide way (140) matched with rotation guide piece (320).

5. A crossover sub assembly according to claim 4, wherein:

the transmission structure comprises a transmission block (220) protruding along the outer peripheral wall of the connecting pipe (200) and a sinking groove (330) arranged on the inner top wall of the spiral cover (300) and used for embedding the transmission block (220), the rotation guide piece (320) comprises a lower cantilever (321) penetrating downwards through the circular arc guide groove (140) and an anti-unhooking hook (322) formed at the lower end of the lower cantilever (321), and the anti-unhooking hook (322) abuts against the lower surface of the mounting ring (100) to prevent the transmission block (220) from being separated from the sinking groove (330) and enable the lower end face of the spiral cover (300) to be kept in abutting connection with the upper end face of the mounting ring (100).

6. A crossover sub assembly according to claim 5, wherein:

the rotary guide piece (320) and the circular arc guide grooves (140) are all arranged in a plurality, the circular arc guide grooves (140) and the rotary guide piece (320) are evenly distributed circumferentially around the central line of the mounting ring (100), and when the lower cantilever (321) abuts against one end of the circular arc guide grooves (140), the elastic hook portion (110) is buckled on the lower edge of the inner ring of the circular ring portion (13) of the gas tank main body (10), or the elastic hook portion (110) is separated from the gas tank main body (10).

7. A crossover sub assembly according to claim 1, wherein:

the gas channel (230) comprises a lower wide-mouth channel (231), a narrow-mouth channel (232) and an upper wide-mouth channel (233) which are sequentially connected from bottom to top, a first step is formed between the lower wide-mouth channel (231) and the narrow-mouth channel (232), a second step is formed between the upper wide-mouth channel (233) and the narrow-mouth channel (232), a first sealing ring (410) which can be connected with the outer peripheral wall of the exhaust valve assembly (12) in a sealing mode is arranged in the lower wide-mouth channel (231), the exhaust valve assembly (12) can be propped against the first step to be in an opening state, and the one-way valve assembly (500) is arranged in the upper wide-mouth channel (233).

8. A crossover sub assembly according to claim 7, wherein:

the one-way valve assembly (500) comprises a spring (510), a valve needle (520) and an air outlet pipe (530), wherein the valve needle (520) is sleeved with a second sealing ring (420), the air outlet pipe (530) is fixedly arranged at the top of the connecting pipe (200), the valve needle (520) is arranged on the air outlet pipe (530) in a penetrating mode, two ends of the spring (510) are respectively abutted to the second step position and the valve needle (520) so that the second sealing ring (420) seals a gap between the valve needle (520) and the air outlet pipe (530).

9. A crossover sub assembly according to claim 8, wherein:

the upper part of the connecting pipe (200) is provided with an annular mounting groove for accommodating the air outlet pipe (530), and the upper end surface of the connecting pipe (200) is formed with a riveting anti-drop flange (240) for preventing the air outlet pipe (530) from separating from the connecting pipe (200).

10. A crossover sub assembly according to claim 9, wherein:

a third sealing ring (430) is arranged between the outer peripheral wall of the air outlet pipe (530) and the inner peripheral wall of the annular mounting groove.