Stepless rotating double joint air nozzle

Abstract

The present invention provides a stepless rotating double-joint gas nozzle, which relates to the technical field of gas nozzles. The stepless rotating double-joint gas nozzle comprises: an air inlet pipe, an air nozzle, an air pipe, an air pipe joint, a prefabricated joint, an adapter pipe and a swivel joint; the air inlet pipe is connected to the head end of the air nozzle by rotation and sealing, and the air nozzle is connected to the air pipe joint through the air pipe; the prefabricated joint is connected to the adapter pipe by rotation and sealing; the swivel joint is connected to the adapter pipe by rotation and sealing; the end sealing thread of the air pipe joint is connected to the head end of the prefabricated joint or the head end of the swivel joint; when inflating the swivel valve core, the prefabricated joint is connected to the air pipe joint, and when inflating the prefabricated valve core, the prefabricated joint is unscrewed and turned over, which makes it easy to replace the air nozzle without scattered parts during the replacement process; whether it is a prefabricated joint or a swivel joint, it can be connected to the valve core by rotating relative to the adapter pipe, so that the air pipe is no longer twisted, avoiding the hidden danger of the air pipe rupture due to twisting.

Description

Technical Field

[0001] The present invention relates to the technical field of gas nozzles, and in particular to a stepless rotating double-joint gas nozzle. Background Art

[0002] Existing bicycle tire valve cores are roughly divided into two types: one is American type and the other is French type.

[0003] The external thread of the American valve core is 8V1, and the external thread of the Presta valve core is 5V1 at one section and 8V1 at another section, which means that the corresponding air nozzle needs to be replaced when inflating tires with different valve cores.

[0004] Currently, replacing a joint requires removing the original air nozzle and then installing the corresponding air nozzle. During this process, the parts are scattered and easy to lose.

[0005] Moreover, the existing inflation device requires twisting the air pipe to achieve the threaded connection between the air nozzle and the valve core, which is inconvenient to use and may easily cause the air pipe to rupture during high-pressure inflation operations or long-term use, posing a safety hazard. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In view of the deficiencies in the prior art, the present invention provides a stepless rotating double-joint air nozzle, which solves the problems of cumbersome operation of replacing the air nozzle of the inflation equipment, easy loss of parts and inconvenient connection between the air nozzle and the valve core.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A stepless rotating double-joint gas nozzle, comprising: an air inlet pipe, an air nozzle, an air pipe, an air pipe joint, a French nozzle joint, a transfer pipe and a American nozzle joint;

[0011] The air inlet pipe is connected to the head end of the air nozzle in a rotating and sealing manner, and the end of the air nozzle is connected to the head end of the air pipe joint through the air pipe;

[0012] The end of the flange joint is connected to the head end of the adapter tube in a rotating and sealing manner;

[0013] The end of the beautiful nozzle joint is connected to the end of the adapter tube in a rotating and dynamic sealing manner;

[0014] The end of the trachea joint is sealed and threadedly connected to the head end of a French joint or a head end of a American joint.

[0015] Preferably, the end of the air nozzle and the air pipe joint are both connected to the air pipe via a crimping joint.

[0016] Preferably, a first sealing groove is provided in the Presta valve joint, and a sealing ring is clamped in the first sealing groove for sealing the Presta valve joint and the trachea joint or the Presta valve core;

[0017] A second sealing groove is provided on the outer wall of the valve joint, and a sealing ring is clamped in the second sealing groove for sealing the valve joint and the transfer tube.

[0018] Preferably, the transfer pipe includes: a French nozzle section, an American nozzle section and a bend section;

[0019] The French mouth section and the American mouth section are connected by a bend pipe section;

[0020] A limiting groove is provided at the end of the beautiful mouth section, and a limiting member is provided in the limiting groove;

[0021] The outer wall of the end of the nozzle joint is provided with an undercut groove, and the limiting piece is connected with the undercut groove to limit the axial movement of the nozzle joint, but does not limit the free rotation of the nozzle joint.

[0022] Preferably, the stepless rotating double-joint gas nozzle further comprises: a special-shaped screw;

[0023] A first limiting ring is provided at the end of the beauty nozzle joint. The screw section of the special-shaped screw passes through the beauty nozzle joint and is threadedly connected to the beauty nozzle section. The head of the special-shaped screw is limitedly connected to the first limiting ring, which limits the axial movement of the beauty nozzle joint but does not limit the free rotation of the beauty nozzle joint.

[0024] The outer wall of the special-shaped screw is provided with a third sealing groove and a fourth sealing groove, and the third sealing groove and the fourth sealing groove are both provided with sealing rings, which are respectively used to seal the special-shaped screw with the adapter tube and the beauty nozzle joint;

[0025] The head of the special-shaped screw is provided with an axially extending protrusion; the protrusion is provided with a slot;

[0026] The special-shaped screw is provided with an axial through hole.

[0027] Preferably, a fifth sealing groove is provided in the Schrader joint, and a sealing ring is clamped in the fifth sealing groove for sealing the Schrader joint and the trachea joint or the Schrader valve core.

[0028] Preferably, the limiting member is configured as a steel ball.

[0029] Preferably, the limiter is configured as an open ring, which is clamped in the limiter groove, and the limiter is provided with a slide groove that matches the end of the nozzle joint. The slide groove and the undercut groove engage with each other to limit the axial movement of the nozzle joint, but does not affect the free rotation of the nozzle joint.

[0030] Preferably, a plurality of sixth sealing grooves are provided at the head end of the air connection nozzle, and sealing rings are clamped in the sixth sealing grooves for dynamically sealing the air connection nozzle and the air inlet pipe;

[0031] A second limiting ring is provided on the outer wall of the air receiving nozzle, and a clamping hole is opened on the air inlet pipe. The clamping spring passes through the clamping hole and is connected to the second limiting ring to limit the axial movement of the air receiving nozzle but does not affect the free rotation of the air receiving nozzle.

[0032] Preferably, the gas nozzle includes: a sleeve and a blind tube;

[0033] The side wall of the sleeve is provided with an air outlet pipe;

[0034] An air groove is provided on the outer wall of the blind pipe, and an air hole communicating with the blind pipe is provided in the air groove;

[0035] A limit block is provided at the blind end of the blind pipe, which is stuck outside the sleeve to limit the axial movement of the blind pipe. The open end of the blind pipe passes through the sleeve and is sealed with the intake pipe thread.

[0036] The outer wall of the blind pipe is provided with a seventh sealing groove, an eighth sealing groove and a ninth sealing groove. The seventh sealing groove is provided with a sealing ring for sealing the blind pipe and the air inlet pipe; the eighth sealing groove and the ninth sealing groove are both provided with sealing rings for rotating the sealing air groove and the sleeve, so that the air inlet pipe is connected to the air outlet pipe through the blind pipe, the air hole and the air groove in sequence.

[0037] (3) Beneficial effects

[0038] The present invention provides a stepless rotating double-joint gas nozzle. Compared with the prior art, it has the following advantages:

[0039] In the present invention, the stepless rotary double-joint gas nozzle includes: an air inlet pipe, an air nozzle, an air pipe, an air pipe joint, a prefabricated nozzle joint, an adapter pipe and a US-type nozzle joint; the air inlet pipe is connected to the head end of the air nozzle by rotation and sealing, and the end of the air nozzle is connected to the head end of the air pipe joint through the air pipe; the head end of the prefabricated nozzle joint is provided with a first internal thread of 8V1 specification and a second internal thread of 5V1 specification; the end of the prefabricated nozzle joint is connected to the head end of the adapter pipe by rotation and sealing; the head end of the US-type nozzle joint is provided with a third internal thread of 8V1 specification; the end of the US-type nozzle joint is connected to the end of the adapter pipe by rotation and sealing; the end of the air pipe joint is provided with an 8V1 specification The end of the air pipe joint is sealed with a threaded connection to the head end of the Presta joint or the head end of the Schrader joint; when inflating the Schrader valve core, the Presta joint is connected to the air pipe joint, and when inflating the Presta valve core, the Presta joint is unscrewed, turned over, and the Schrader joint is connected to the air pipe joint. The air nozzle is easy to replace, and there are no scattered parts during the replacement process, which avoids the loss of parts; whether it is a Presta joint or a Schrader joint, it can be connected to the valve core by rotating relative to the adapter tube, and the air nozzle can rotate freely relative to the intake pipe, so that the air pipe no longer twists, avoiding the hidden danger of the air pipe rupture due to twisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 Exploded view of the stepless rotating double-joint gas nozzle in Examples 1 and 2 of the present invention;

[0042] Figure 2 1 is an axial cross-sectional view of the stepless rotating double-joint gas nozzle in Examples 1 and 2 of the present invention;

[0043] Figure 3 This is a schematic structural diagram of a stepless rotating double-joint gas nozzle in Example 1 of the present invention;

[0044] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0045] Figure 5 This is a schematic structural diagram of a nozzle joint in Example 1 of the present invention;

[0046] Figure 6 This is a schematic structural diagram of the nozzle joint in Example 1 of the present invention;

[0047] Figure 7 This is a schematic structural diagram of a special-shaped screw in Example 1 of the present invention;

[0048] Figure 8 Schematic diagram of the partial structure of the stepless rotating double-joint gas nozzle in Example 3 of the present invention;

[0049] Figure 9 Schematic diagram of the connection structure between the nozzle joint and the limiting member in Example 3 of the present invention;

[0050] Figure 10 Schematic diagram of the structure of the limiting member in Example 3 of the present invention;

[0051] Figure 11 This is a schematic structural diagram of the gas nozzle in Example 4 of the present invention;

[0052] Figure 12 Schematic diagram of the connection structure between the air nozzle and the air intake pipe in Example 5 of the present invention;

[0053] Figure 13 1 is an exploded view of the air nozzle and the air intake pipe in Example 5 of the present invention;

[0054] Figure 14 This is an axial cross-sectional view of the air nozzle and the air intake pipe in Example 5 of the present invention. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0056] The embodiment of the present application solves the problems of complicated operation of replacing the air nozzle of the inflation equipment, easy loss of parts and inconvenience in connecting the air nozzle to the valve core by providing a stepless rotating double-joint air nozzle.

[0057] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0058] In the embodiment of the present invention, the stepless rotary double-joint gas nozzle includes: an air inlet pipe, an air nozzle, an air pipe, an air pipe joint, a prefabricated nozzle joint, an adapter pipe and a US-type nozzle joint; the air inlet pipe is connected to the head end of the air nozzle by rotation and sealing, and the end of the air nozzle is connected to the head end of the air pipe joint through the air pipe; the head end of the prefabricated nozzle joint is provided with a first internal thread of 8V1 specification and a second internal thread of 5V1 specification; the end of the prefabricated nozzle joint is connected to the head end of the adapter pipe by rotation and sealing; the head end of the US-type nozzle joint is provided with a third internal thread of 8V1 specification; the end of the US-type nozzle joint is connected to the end of the adapter pipe by rotation and sealing; the end of the air pipe joint is provided with an 8V1 The end of the air pipe joint is sealed with a threaded connection to the head end of the Presta joint or the head end of the Schrader joint; when inflating the Schrader valve core, the Presta joint is connected to the air pipe joint; when inflating the Presta valve core, the Presta joint is unscrewed, turned over, and the Schrader joint is connected to the air pipe joint. The air nozzle is easy to replace, and there are no scattered parts during the replacement process, which avoids the loss of parts; whether it is a Presta joint or a Schrader joint, it can be connected to the valve core by rotating relative to the adapter tube, and the air nozzle can rotate freely relative to the intake pipe, so that the air pipe no longer twists, avoiding the hidden danger of the air pipe rupture due to twisting.

[0059] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0060] Example 1:

[0061] like Figures 1 to 3 As shown, the present invention provides a stepless rotating double-joint gas nozzle, which includes: an air inlet pipe 10, an air nozzle 20, an air pipe 30, an air pipe joint 40, a French nozzle joint 50, an adapter pipe 60 and a American nozzle joint 70;

[0062] The air inlet pipe 10 is connected to the head end of the air nozzle 20 in a rotating and sealed manner, and the end of the air nozzle 20 is connected to the head end of the air pipe joint 40 through the air pipe 30;

[0063] The head end of the prefabricated joint 50 is provided with a first internal thread 51 of 8V1 specification and a second internal thread 52 of 5V1 specification; the end of the prefabricated joint 50 is rotatably and dynamically sealedly connected to the head end of the adapter tube 60;

[0064] The head end of the beauty nozzle joint 70 is provided with a third internal thread 71 of 8V1 specification; the end of the beauty nozzle joint 70 is rotatably and dynamically sealedly connected to the end of the adapter tube 60;

[0065] The end of the trachea connector 40 is provided with an external thread of 8V1 specification, and the end of the trachea connector 40 is sealingly threadedly connected to the head end of the French nozzle connector 50 or the head end of the American nozzle connector 70.

[0066] When inflating the Schrader valve core, the Presta valve joint 50 is connected to the trachea joint 40. When inflating the Presta valve core, the Presta valve joint 50 is unscrewed and turned over, and the Schrader joint 70 is connected to the trachea joint 40. The air nozzle is convenient to replace, and there are no scattered parts during the replacement process, which avoids the loss of parts. Both the Presta valve joint 50 and the Schrader joint 70 can be connected to the valve core by rotating relative to the adapter tube 60, and the air nozzle 20 can rotate freely relative to the intake pipe 10, so that the trachea no longer twists, avoiding the hidden danger of the trachea rupture due to twisting.

[0067] like Figures 1 to 3 As shown, the end of the air nozzle 20 and the air pipe connector 40 are both connected to the air pipe 30 via a crimping connector.

[0068] like Figure 1 、 Figure 4 、 Figure 5 As shown, a first sealing groove 53 is defined in the Presta valve joint 50 , and a sealing ring is clamped in the first sealing groove 53 for sealing the Presta valve joint 50 and the trachea joint 40 or the Presta valve core.

[0069] like Figure 1 、 Figure 4 、 Figure 5 As shown, a second sealing groove 54 is formed on the outer wall of the prefabricated joint 50 , and a sealing ring is clamped in the second sealing groove 54 for sealing the prefabricated joint 50 and the adapter tube 60 .

[0070] like Figures 1 to 4 As shown, the transfer pipe 60 includes: a French nozzle section, an American nozzle section and a bend section;

[0071] The Presta valve section and the Schrader valve section are connected by a curved pipe section, so that the Presta valve joint 50 and the Schrader valve joint 70 are not in a straight line, which facilitates the connection between the valve joint and the valve core, especially for bicycle tires with small wheel diameters. Compared with traditional straight-line valves, the connection between the present application and the valve core is much more convenient.

[0072] like Figure 1 、 Figure 4 、 Figure 5 As shown, a limiting groove 61 is provided at the end of the beauty mouth section, and a limiting member 62 is provided in the limiting groove;

[0073] An undercut groove 55 is provided on the outer wall of the end of the prefabricated nozzle joint 50 , and the limiting member 62 is connected to the undercut groove 55 to limit the axial movement of the prefabricated nozzle joint 50 but does not limit the free rotation of the prefabricated nozzle joint 50 .

[0074] like Figure 1 、 Figure 4 、 Figure 6 、 Figure 7 As shown, the stepless rotating double-joint gas nozzle further includes: a special-shaped screw 80;

[0075] A first limiting ring 72 is provided at the end of the beauty nozzle joint 70. The screw section of the special-shaped screw 80 passes through the beauty nozzle joint 70 and is threadedly connected to the beauty nozzle section. The head of the special-shaped screw 80 is limitedly connected to the first limiting ring 72, which limits the axial movement of the beauty nozzle joint 70 but does not limit the free rotation of the beauty nozzle joint 70.

[0076] The outer wall of the special-shaped screw 80 is provided with a third sealing groove 81 and a fourth sealing groove 82. The third sealing groove 81 and the fourth sealing groove 82 are both provided with sealing rings, which are used to seal the special-shaped screw 80 with the adapter tube 60 and the beauty nozzle joint 70 respectively.

[0077] The head of the special-shaped screw 80 is provided with an axially extending protrusion 83, which is used to push open the ejector pin of the Schrader valve core during inflation; the protrusion 83 is provided with a slot 84 to facilitate the screwdriver to drive the special-shaped screw 80 to rotate;

[0078] The special-shaped screw 80 defines an axial through hole 85 , so that the French tap joint 50 and the American tap joint 70 are connected to each other.

[0079] like Figure 4 、 Figure 6 As shown, a fifth sealing groove 73 is provided in the Schrader joint 70 , and a sealing ring is clamped in the fifth sealing groove 73 for sealing the Schrader joint 70 and the trachea joint 40 or the Schrader valve core.

[0080] Example 2:

[0081] like Figure 1 、 Figure 4As shown, the limiting member 62 is configured as a steel ball, which is stuck in the limiting groove 61 and the undercut groove 55 to limit the axial movement of the prefabricated joint 50, but does not affect the free rotation of the prefabricated joint 50.

[0082] Example 3:

[0083] like Figures 8 to 10 As shown, the limit member 62 is configured as an open ring, the limit member 62 is clamped in the limit groove 61, and the limit member 62 is provided with a slide groove 63 that matches the end of the nozzle joint 50. The slide groove 63 and the undercut groove 55 engage with each other to limit the axial movement of the nozzle joint 50, but does not affect the free rotation of the nozzle joint 50.

[0084] Example 4:

[0085] like Figure 1 、 Figure 2 、、 Figure 3 、 Figure 11 As shown, the head end of the air receiving nozzle 20 is provided with a plurality of sixth sealing grooves 21, and the sixth sealing grooves 21 are provided with sealing rings for dynamically sealing the air receiving nozzle 20 and the air inlet pipe 10;

[0086] A second limiting ring 22 is provided on the outer wall of the air nozzle 20, and a clamping hole 11 is opened in the air intake pipe 10. The clamping spring 12 passes through the clamping hole 11 and is connected to the second limiting ring 22 to limit the axial movement of the air nozzle 20, but does not affect the free rotation of the air nozzle 20.

[0087] Example 5:

[0088] like Figures 12 to 14 As shown, the air nozzle 20 includes: a sleeve 23 and a blind tube 24;

[0089] The side wall of the sleeve 23 is provided with an air outlet pipe 231;

[0090] An air groove 241 is formed on the outer wall of the blind tube 24, and an air hole 242 is formed in the air groove 241 to communicate with the blind tube 24;

[0091] A limit block 243 is provided at the blind end of the blind tube 24. The limit block 243 is stuck outside the sleeve 23 to limit the axial movement of the blind tube 24. The open end of the blind tube 24 passes through the sleeve 23 and is threadedly sealed with the air inlet pipe 10.

[0092] The outer wall of the blind tube 24 is provided with a seventh sealing groove, an eighth sealing groove and a ninth sealing groove. The seventh sealing groove is provided with a sealing ring for sealing the blind tube 24 and the air inlet pipe 10. The eighth sealing groove and the ninth sealing groove are both provided with sealing rings for rotating the sealing air groove 241 and the sleeve 23, so that the air inlet pipe 10 is connected to the air outlet pipe 231 through the blind tube 24, the air hole 242 and the air groove 241 in sequence. The free rotation of the blind tube 24 relative to the sleeve 23 does not affect the connection between the air inlet pipe 10 and the air outlet pipe 231.

[0093] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0094] In the embodiment of the present invention, the stepless rotary double-joint gas nozzle includes: an air inlet pipe, an air nozzle, an air pipe, an air pipe joint, a prefabricated nozzle joint, an adapter pipe and a US-type nozzle joint; the air inlet pipe is connected to the head end of the air nozzle by rotation and sealing, and the end of the air nozzle is connected to the head end of the air pipe joint through the air pipe; the head end of the prefabricated nozzle joint is provided with a first internal thread of 8V1 specification and a second internal thread of 5V1 specification; the end of the prefabricated nozzle joint is connected to the head end of the adapter pipe by rotation and sealing; the head end of the US-type nozzle joint is provided with a third internal thread of 8V1 specification; the end of the US-type nozzle joint is connected to the end of the adapter pipe by rotation and sealing; the end of the air pipe joint is provided with an 8V1 The end of the air pipe joint is sealed with a threaded connection to the head end of the Presta joint or the head end of the Schrader joint; when inflating the Schrader valve core, the Presta joint is connected to the air pipe joint; when inflating the Presta valve core, the Presta joint is unscrewed, turned over, and the Schrader joint is connected to the air pipe joint. The air nozzle is easy to replace, and there are no scattered parts during the replacement process, which avoids the loss of parts; whether it is a Presta joint or a Schrader joint, it can be connected to the valve core by rotating relative to the adapter tube, and the air nozzle can rotate freely relative to the intake pipe, so that the air pipe no longer twists, avoiding the hidden danger of the air pipe rupture due to twisting.

[0095] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A stepless rotating double-joint gas nozzle, characterized in that: The stepless rotating double-joint gas nozzle comprises: an air inlet pipe (10), an air connection nozzle (20), an air pipe (30), an air pipe joint (40), a French nozzle joint (50), a transfer pipe (60) and a American nozzle joint (70); The air inlet pipe (10) is connected to the head end of the air nozzle (20) in a rotating and sealing manner, and the end of the air nozzle (20) is connected to the head end of the air pipe joint (40) through the air pipe (30); The end of the valve joint (50) is connected to the head end of the transfer tube (60) in a rotating and sealing manner; The end of the beauty nozzle joint (70) is connected to the end of the transfer tube (60) in a rotating and dynamic sealing manner; The end of the tracheal joint (40) is sealed and threadedly connected to the head end of the French nozzle joint (50) or the head end of the American nozzle joint (70); The end of the air connection nozzle (20) and the air pipe joint (40) are both connected to the air pipe (30) via a crimping joint; The transfer pipe (60) comprises: a French nozzle section, a US nozzle section and a bend section; The French mouth section and the American mouth section are connected by a bend pipe section; A limiting groove (61) is provided at the end of the beauty mouth section, and a limiting member (62) is provided in the limiting groove; The outer wall of the end of the nozzle joint (50) is provided with an undercut groove (55), and the limiting member (62) is connected to the undercut groove (55) to limit the axial movement of the nozzle joint (50) but does not limit the free rotation of the nozzle joint (50).

2. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: A first sealing groove (53) is provided in the Presta valve joint (50), and a sealing ring is clamped in the first sealing groove (53) for sealing the Presta valve joint (50) and the trachea joint (40) or the Presta valve core; A second sealing groove (54) is provided on the outer wall of the valve joint (50), and a sealing ring is clamped in the second sealing groove (54) for sealing the valve joint (50) and the transfer tube (60).

3. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: The stepless rotating double-joint gas nozzle further comprises: a special-shaped screw (80); The end of the nozzle joint (70) is provided with a first limiting ring (72), and the screw section of the special-shaped screw (80) passes through the nozzle joint (70) and is threadedly connected to the nozzle section. The head of the special-shaped screw (80) is limitedly connected to the first limiting ring (72), which limits the axial movement of the nozzle joint (70) but does not limit the free rotation of the nozzle joint (70); The outer wall of the special-shaped screw (80) is provided with a third sealing groove (81) and a fourth sealing groove (82), and the third sealing groove (81) and the fourth sealing groove (82) are both provided with sealing rings, which are used to seal the special-shaped screw (80) with the transfer tube (60) and the beauty nozzle joint (70) respectively; The head of the special-shaped screw (80) is provided with an axially extending protrusion (83); the protrusion (83) is provided with a slot (84); The special-shaped screw (80) is provided with an axial through hole (85).

4. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: A fifth sealing groove (73) is provided in the Schrader joint (70), and a sealing ring is clamped in the fifth sealing groove (73) for sealing the Schrader joint (70) and the trachea joint (40) or the Schrader valve core.

5. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: The limiting member (62) is configured as a steel ball.

6. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: The limiting member (62) is configured as an open ring, the limiting member (62) is clamped in the limiting groove (61), and the limiting member (62) is provided with a sliding groove (63) matching the end of the nozzle joint (50), the sliding groove (63) and the undercut groove (55) are engaged with each other, limiting the axial movement of the nozzle joint (50), but does not affect the free rotation of the nozzle joint (50).

7. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: The head end of the air connection nozzle (20) is provided with a plurality of sixth sealing grooves (21), and the sixth sealing grooves (21) are provided with sealing rings for dynamically sealing the air connection nozzle (20) and the air inlet pipe (10); The outer wall of the air receiving nozzle (20) is provided with a second limiting ring (22), the air inlet pipe (10) is provided with a clamping hole (11), and the clamping spring (12) passes through the clamping hole (11) and is connected to the second limiting ring (22) to limit the axial movement of the air receiving nozzle (20) but does not affect the free rotation of the air receiving nozzle (20).

8. The stepless rotating double-joint gas nozzle according to claim 1, characterized in that: The air connection nozzle (20) comprises: a sleeve (23) and a blind tube (24); An air outlet pipe (231) is provided on the side wall of the sleeve (23); An air groove (241) is provided on the outer wall of the blind tube (24), and an air hole (242) communicating with the blind tube (24) is provided in the air groove (241); A limit block (243) is provided at the blind end of the blind tube (24), and the limit block (243) is stuck outside the sleeve (23) to limit the axial movement of the blind tube (24). The open end of the blind tube (24) passes through the sleeve (23) and is threadedly sealed with the air inlet pipe (10). The outer wall of the blind tube (24) is provided with a seventh sealing groove, an eighth sealing groove and a ninth sealing groove. The seventh sealing groove is provided with a sealing ring for sealing the blind tube (24) and the air inlet pipe (10). The eighth sealing groove and the ninth sealing groove are both provided with sealing rings for rotating and sealing the air groove (241) and the sleeve (23), so that the air inlet pipe (10) is connected to the air outlet pipe (231) in sequence through the blind tube (24), the air hole (242) and the air groove (241).

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