Air supply line valve

Abstract

The utility model discloses a kind of gas supply pipeline valves, including valve body, rotary switch and valve core, valve body is equipped with intake end pipe and multiple gas outlet end pipes, airflow passage and multiple valve core passages are equipped in valve body, intake end pipe and gas outlet end pipe are communicated with airflow passage, valve core passage is set one to one with gas outlet end pipe, valve core passage is communicated with corresponding gas outlet end pipe and airflow passage, and every valve core passage is equipped with a valve core, every valve core is equipped with rotary switch;Valve core includes valve rod, stud and valve plug, stud and valve plug are respectively arranged at the top end and bottom end of valve rod, stud is connected with a rotary switch threadedly.Reached technical effect is: suitable for multi-pipeline oxygen supply pillow, each pipeline opening and closing and flow size can be controlled independently, it is convenient to realize subarea oxygen supply;Whole valve degree of integration is high, and structure is simple, opening and closing and flow size of corresponding pipeline can be controlled by rotating rotary switch in use process, it is convenient to use operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline valve technology, specifically to a gas supply pipeline valve. Background Technology

[0002] Existing oxygen-supplying pillows typically employ a design with a single oxygen supply tube inside the pillow, utilizing the breathability of the pillow material to achieve diffused oxygen delivery. However, this single-tube-based oxygen supply method has significant technical limitations: firstly, because oxygen is output through only a single tube, the oxygen supply area is too concentrated, making it difficult to achieve precise, zoned oxygen supply adjustment according to the needs of different areas of the head; secondly, the single-tube oxygen supply mode easily leads to uneven oxygen distribution on the pillow's head surface, especially with a significant decrease in oxygen concentration at the distal end of the tube, affecting the user's breathing comfort and the effectiveness of oxygen therapy.

[0003] To address these issues, the industry has recently proposed a solution using multiple parallel oxygen supply lines. This design, by arranging several independent oxygen supply branches inside the pillow, theoretically corresponds to different support areas of the head, achieving both zoned oxygen supply and significantly improving oxygen uniformity across the head and pillow surface through the coordinated distribution of multiple lines. However, the practical application of this technology still faces a key technical bottleneck: the market currently lacks dedicated gas path control valves for such multi-line systems. Existing conventional valve structures are typically only suitable for single-line or simple parallel gas path control, unable to independently and flexibly control the on / off flow and flow of multiple oxygen supply lines. This lack of dedicated valves makes it difficult for multi-line oxygen supply pillows to achieve advanced functions such as on-demand zoned control and dynamic gas volume distribution, severely restricting the functional realization and widespread application of such products in clinical environments and home care scenarios.

[0004] Therefore, there is an urgent need to design a dedicated control valve that can adapt to multi-line oxygen supply systems, enabling it to independently and reliably control the on / off status of each oxygen supply line, and further integrate flow regulation functions. The development of such a valve will provide crucial technical support for realizing diverse functions of oxygen pillows, such as zoned oxygen supply, uniform oxygen supply, and personalized oxygen adjustment, and is of great significance for promoting technological advancements and product upgrades in oxygen-assisted nursing equipment. Utility Model Content

[0005] Therefore, this utility model provides a gas supply pipeline valve to solve the above-mentioned problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] According to a first aspect of this utility model, a gas supply pipeline valve includes a valve body, a rotary switch, and a valve core. The valve body is provided with an inlet pipe and multiple outlet pipes. The valve body is provided with an airflow channel and multiple valve core channels. The inlet pipe and the outlet pipe are both connected to the airflow channel. The valve core channels are arranged one-to-one with the outlet pipes. The valve core channels are connected to the corresponding outlet pipes and the airflow channel. Each valve core channel is provided with a valve core. Each valve core is provided with the rotary switch. The rotary switch is rotatably disposed outside the valve body. The valve core is used to control the opening and closing of the corresponding valve core channel.

[0008] The valve core includes a valve stem, a stud, and a valve plug. The stud and the valve plug are respectively disposed at the top and bottom ends of the valve stem. The stud is threadedly connected to a rotary switch.

[0009] Furthermore, there are two outlet pipes and two valve core channels. The airflow channel is arranged along the length of the valve body. Both outlet pipes are located at the bottom of the valve body, and the two valve core channels are respectively located at both ends of the airflow channel. The two outlet pipes and the two valve core channels are arranged in a one-to-one correspondence. The inlet pipe is located at the top of the valve body and is located in the middle of the airflow channel.

[0010] Furthermore, the valve core channel includes a valve stem channel and a valve cavity, the valve cavity is disposed at the bottom end of the valve stem channel, the valve cavity is connected to the airflow channel, the bottom end of the valve cavity is provided with an air outlet, and the air outlet is connected to the corresponding air outlet pipe; the top end of the valve stem channel penetrates the valve body;

[0011] The valve stem is slidably connected to the valve stem channel, and the valve plug is slidably disposed in the valve cavity. The valve plug is used to control the opening and closing of the air outlet.

[0012] Furthermore, it also includes a valve cover, which is disposed on the top of the valve body, and the rotary switch is rotatably connected to the valve cover.

[0013] Furthermore, the valve cover is provided with two switch mounting holes, which correspond one-to-one with the two valve cores, and each switch mounting hole is provided with a rotary switch.

[0014] Furthermore, the bottom of the valve cover is provided with two receiving grooves, and the two receiving grooves are respectively provided in a one-to-one correspondence with the two switch mounting holes;

[0015] The rotary switch includes a knob, a rod, and a stop. The knob and the stop are respectively disposed at the top and bottom of the rod. The rod has a threaded hole that matches the stud.

[0016] Both ends of the rotary rod pass through the corresponding switch mounting holes, and each of the receiving slots is provided with a limiting member, which is sleeved on the corresponding rotary rod.

[0017] Furthermore, an opening is provided on one side of the receiving groove, and snap-fit ​​posts are provided on both sides of the opening;

[0018] The limiting component includes a first limiting component and a second limiting component. Both the first limiting component and the second limiting component are C-shaped and together form a ring structure. The second limiting component has two elastic arms on the side opposite to the first limiting component. The two elastic arms are arranged parallel to each other, and the end of the elastic arm opposite to the second limiting component has a slot. The slot matches the locking post.

[0019] Furthermore, the valve stem is provided with a limiting protrusion, and the valve stem channel is provided with a limiting groove along its length direction, with the limiting protrusion and the limiting groove being matched and configured to match each other.

[0020] Furthermore, the valve cover is provided with a through hole and a plurality of first mounting holes, and the bottom of the valve cover is provided with a plurality of positioning holes. The through hole and the first mounting holes both penetrate the valve cover. The through hole and the air inlet pipe are arranged corresponding to each other. The air inlet pipe penetrates the through hole and extends to the outside of the valve cover.

[0021] The top of the valve body is provided with multiple second mounting holes and multiple positioning pins. The second mounting holes and the first mounting holes are arranged in a one-to-one correspondence, and the positioning pins and the positioning holes are arranged in a one-to-one correspondence.

[0022] Furthermore, the top of the valve body is provided with a plurality of protrusions, which are arranged in a ring along the top edge of the valve body and are located between the valve cover and the valve body.

[0023] This utility model has the following advantages: it is suitable for multi-pipe oxygen supply pillows, and the opening and closing and flow rate of each pipeline can be controlled independently, which is convenient for realizing regional oxygen supply; the entire valve has a high degree of integration and a simple structure. During use, the opening and closing and flow rate of the corresponding pipeline can be controlled by rotating the rotary switch, which is convenient for use and operation. Attached Figure Description

[0024] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0026] Figure 1 This is a first-view view of a gas supply pipeline valve provided for some embodiments of the present invention.

[0027] Figure 2 A second-view view of a gas supply pipeline valve provided for some embodiments of this utility model.

[0028] Figure 3 This is a cross-sectional view of a gas supply pipeline valve provided for some embodiments of the present utility model.

[0029] Figure 4 An exploded view of a gas supply pipeline valve provided for some embodiments of this utility model.

[0030] Figure 5 This is a schematic diagram of the overall structure of a rotary switch for a gas supply pipeline valve, provided for some embodiments of this utility model.

[0031] Figure 6 This is a cross-sectional view of a rotary switch for a gas supply pipeline valve, provided for some embodiments of this utility model.

[0032] Figure 7 This is a schematic diagram of the overall structure of the retaining ring of a gas supply pipeline valve provided in some embodiments of this utility model.

[0033] Figure 8 An exploded view of a retaining ring for a gas supply pipeline valve, provided for some embodiments of this utility model.

[0034] Figure 9 This is a schematic diagram of the overall structure of the valve core of a gas supply pipeline valve provided for some embodiments of the present invention.

[0035] Figure 10 This is a first-view view of the valve cover of a gas supply pipeline valve provided for some embodiments of the present invention.

[0036] Figure 11 A second-view view of the valve cover of a gas supply pipeline valve provided for some embodiments of this utility model.

[0037] Figure 12This is a schematic diagram of the overall structure of a gas supply pipeline valve body provided for some embodiments of the present invention.

[0038] Figure 13 This is a cross-sectional view of the valve body of a gas supply pipeline valve provided for some embodiments of this utility model.

[0039] In the diagram: 1. Valve cover, 2. Rotary switch, 3. Valve body, 4. First mounting hole, 5. Inlet pipe, 6. Outlet pipe, 7. Limiting element, 8. Valve core, 9. Knob, 10. Rotary rod, 11. Edge, 12. Threaded hole, 13. First limiting element, 14. Second limiting element, 15. Elastic arm, 16. Slot, 17. Valve stem, 18. Stud, 19. Valve plug, 20. Limiting protrusion, 21. Switch mounting hole, 22. Through hole, 23. Positioning hole, 24. Receiving groove, 25. Snap-fit ​​post, 26. Valve stem channel, 27. Limiting groove, 28. Positioning post, 29. Second mounting hole, 30. Protrusion, 31. Airflow channel, 32. Valve cavity, 33. Sealing groove. Detailed Implementation

[0040] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] Example 1

[0042] like Figures 1 to 13 As shown, a gas supply pipeline valve in the first aspect embodiment of this utility model includes a valve body 3, a rotary switch 2, and a valve core 8. The valve body 3 is provided with an inlet pipe 5 and multiple outlet pipes 6. The valve body 3 is provided with an airflow channel 31 and multiple valve core channels. The inlet pipe 5 and the outlet pipes 6 are both connected to the airflow channel 31. The valve core channels are arranged one-to-one with the outlet pipes 6. The valve core channels are connected to the corresponding outlet pipes 6 and the airflow channel 31. Each valve core channel is provided with a valve core 8. The valve core 8 is coaxially arranged with the valve core channel and is slidably connected to the valve core channel. Each valve core 8 is provided with a rotary switch 2. The valve core 8 is used to control the opening and closing of the corresponding valve core channel.

[0043] like Figure 9 As shown, the valve core 8 includes a valve stem 17, a stud 18, and a valve plug 19. The stud 18 and the valve plug 19 are respectively disposed at the top and bottom ends of the valve stem 17. The valve stem 17, the stud 18, and the valve plug 19 are coaxially arranged. The stud 18 is threadedly connected to a rotary switch 2.

[0044] In this embodiment, it should be noted that the inlet pipe 5, the outlet pipe 6, and the valve body 3 are an integral structure. The rotary switch 2 is rotatably mounted outside the valve body 3. During use, rotating the rotary switch 2 can drive the valve core 8 to move back and forth along the valve core channel, thereby controlling the opening and closing of the valve core channel.

[0045] The technical effects achieved by this embodiment are as follows: it is suitable for multi-pipe oxygen supply pillows, and the opening and closing and flow rate of each pipeline can be controlled independently, which is convenient for realizing regional oxygen supply; the entire valve has a high degree of integration and a simple structure. During use, the opening and closing and flow rate of the corresponding pipeline can be controlled by rotating the rotary switch 2, which is convenient for use and operation.

[0046] Example 2

[0047] like Figures 1 to 13 As shown, another gas supply pipeline valve provided in this embodiment has the same structure as in Embodiment 1. Only the different parts are described below.

[0048] In this embodiment, there are two outlet pipes 6 and two valve core channels, such as... Figure 13 As shown, the airflow channel 31 is arranged along the length of the valve body 3. Two outlet pipes 6 are both located at the bottom of the valve body 3. Two valve core channels are respectively located at both ends of the airflow channel 31. The two outlet pipes 6 are arranged one-to-one with the two valve core channels. The outlet pipes 6 are arranged in a direction perpendicular to the airflow channel 31. The inlet pipe 5 is located at the top of the valve body 3 and is located in the middle of the airflow channel 31. The inlet pipe 5 is arranged in a direction perpendicular to the airflow channel 31. The bottom end of the inlet pipe 5 is connected to the airflow channel 31, and the orientation of the inlet pipe 5 is opposite to that of the outlet pipe 6.

[0049] In this embodiment, it should be noted that the valve core channel is arranged in a direction perpendicular to the airflow channel 31, and the valve core channel is coaxially arranged with the corresponding air outlet pipe 6. The valve core channel includes a valve stem channel 26 and a valve cavity 32. The valve cavity 32 is located at the bottom end of the valve stem channel 26 and is connected to the airflow channel 31. The bottom end of the valve cavity 32 is provided with an air outlet, and the air outlet is connected to the corresponding air outlet pipe 6. The top end of the valve stem channel 26 penetrates the valve body 3.

[0050] The valve stem 17 is slidably connected to the valve stem channel 26. The valve plug 19 is cylindrical and is slidably disposed in the valve cavity 32. The valve plug 19 is used to control the opening and closing of the gas outlet. Multiple sealing grooves 33 are provided on the outer wall of the valve plug 19. The multiple sealing grooves 33 are arranged sequentially along the length direction of the valve plug 19. The sealing grooves 33 are annular and are used to install sealing rings. The sealing rings 33 are used to form a seal with the valve cavity 32 to prevent gas from leaking out along the axial direction of the valve plug 19.

[0051] During use, such as Figure 3As shown, by rotating the rotary switch 2 in the reverse direction, the valve stem 17 and the valve plug 19 move along the valve core channel, causing the valve plug 19 to move closer to the air outlet and close the air outlet and the airflow channel 31. When this closes the air outlet, the corresponding air outlet pipe 6 is in a closed state. When rotating the rotary switch 2 in the forward direction, the valve stem 17 and the valve plug 19 move along the valve core channel, causing the valve plug 19 to move away from the air outlet and connect the air outlet and the airflow channel 31, the air outlet can be opened, and the corresponding air outlet pipe 6 is in an open state. At the same time, by adjusting the position of the valve plug 19, the cross-sectional area of ​​the gas channel between the air outlet and the airflow channel 31 can be adjusted, thereby controlling the flow rate.

[0052] The technical effect achieved by this embodiment is that the entire valve can control the opening and closing of each oxygen supply pipeline of the dual-pipeline oxygen supply pillow, and the operation is simple.

[0053] Example 3

[0054] like Figures 1 to 13 As shown, another gas supply pipeline valve provided in this embodiment has the same structure as in embodiment 2. Only the different parts are described below.

[0055] In this embodiment, a valve cover 1 is also included. The valve cover 1 is detachably disposed on the top of the valve body 3, and the rotary switch 2 is rotatably connected to the valve cover 1.

[0056] In this embodiment, it should be noted that, as Figure 10 and Figure 11 As shown, the valve cover 1 is provided with two switch mounting holes 21, and the two switch mounting holes 21 are set one-to-one with the two valve cores 8. Each switch mounting hole 21 is provided with a rotary switch 2. The top of the switch mounting hole 21 is provided with an annular indicator scale, which is used to indicate the valve opening and closing status and the opening degree. The rotary switch 2 is provided with an indicator arrow, which matches the annular indicator scale.

[0057] Furthermore, such as Figure 11 As shown, the bottom of the valve cover 1 is provided with two receiving grooves 24, and the two receiving grooves 24 are respectively set to correspond one-to-one with the two switch mounting holes 21;

[0058] The rotary switch 2 includes a knob 9, a lever 10, and a stop 11. The knob 9 and the stop 11 are respectively located at the top and bottom of the lever 10. The knob 9, the lever 10, and the stop 11 are an integral structure and are coaxially arranged. The lever 10 has a threaded hole 12 along its axis, and the threaded hole 12 matches the stud 18.

[0059] Both ends of the rotary rod 10 pass through the corresponding switch mounting holes 21. Each receiving groove 24 is provided with a limiting member 7. The limiting member 7 is sleeved on the corresponding rotary rod 10. The rotary rod 10 is rotatably connected to the limiting member 7. The limiting member 7 is used to limit the position of the rotary switch 2.

[0060] Furthermore, such as Figure 11 As shown, the receiving groove 24 has an opening on one side, and snap-fit ​​posts 25 are provided on both sides of the opening;

[0061] like Figure 7 and Figure 8 As shown, the limiting member 7 includes a first limiting member 13 and a second limiting member 14. Both the first limiting member 13 and the second limiting member 14 are C-shaped and together form a ring structure. The second limiting member 14 has two elastic arms 15 on the side opposite to the first limiting member 13. The two elastic arms 15 are arranged parallel to each other, and the end of the elastic arm 15 opposite to the second limiting member 14 has a slot 16. The slot 16 is matched with the locking post 25. After installation, the two elastic arms 15 lock the limiting member 7 into the receiving groove 24 and limit the position of the rotary switch 2 so that it can only rotate along its axis.

[0062] The technical effect achieved by this embodiment is that the position of the rotary switch 2 can be limited by setting the limiting component 7, and the rotary switch 2 is connected to the valve cover 1 as a whole, preventing the rotary switch 2 from falling off during use.

[0063] Example 4

[0064] like Figures 1 to 13 As shown, another gas supply pipeline valve provided in this embodiment has the same structure as in embodiment 3. Only the different parts are described below.

[0065] In this embodiment, as Figure 9 As shown, the valve stem 17 is provided with a limiting protrusion 20, which is L-shaped. The short side of the limiting protrusion 20 is located at the top of the long side of the limiting protrusion 20. One side of the long side of the limiting protrusion 20 is connected to the valve stem 17. The short side of the limiting protrusion 20 is arranged perpendicular to the axis of the valve stem 17. The valve stem channel 26 is provided with a limiting groove 27 along its length. The long side of the limiting protrusion 20 and the limiting groove 27 are matched and arranged to match each other. The long side of the limiting protrusion 20 is slidably arranged in the limiting groove 27. The long side of the limiting protrusion 20 plays a guiding and limiting role, so that the valve stem 17 can only move back and forth in a straight line, preventing the valve stem 17 from rotating during use. The short side of the limiting protrusion 20 plays a limiting role, limiting the downward movement position of the valve stem 17.

[0066] In this embodiment, it should be noted that there are two limiting protrusions 20, which are symmetrically arranged on both sides of the valve stem 17 along the axis of the valve stem 17; there are two limiting grooves 27, which are symmetrically arranged along the axis of the valve stem channel 26.

[0067] like Figures 10 to 13As shown, the valve cover 1 is provided with a through hole 22 and a plurality of first mounting holes 4. The bottom of the valve cover 1 is provided with a plurality of positioning holes 23. The through hole 22 and the first mounting holes 4 both penetrate the valve cover 1. The first mounting holes 4 are stepped holes. The through hole 22 and the air inlet pipe 5 are provided corresponding to each other. The air inlet pipe 5 penetrates the through hole 22 and extends to the outside of the valve cover 1.

[0068] The top of the valve body 3 is provided with multiple second mounting holes 29 and multiple positioning pins 28. The second mounting holes 29 are threaded holes, and the second mounting holes 29 and the first mounting holes 4 are arranged in a one-to-one correspondence. The positioning pins 28 and the positioning holes 23 are arranged in a one-to-one correspondence. Specifically, in this embodiment, there are two first mounting holes 4, which are arranged along the length of the valve cover 1 and are symmetrically arranged along the axis of the through hole 22. The first mounting holes 4 and the second mounting holes 29 are used with bolts to quickly connect and fix the valve cover 1 and the valve body 3. There are four positioning holes 23, which are distributed in a ring along the axis of the through hole 22. The positioning holes 23 and the positioning pins 28 are used in cooperation to achieve quick positioning and installation between the valve cover 1 and the valve body 3.

[0069] Furthermore, such as Figure 12 As shown, the top of the valve body 3 is provided with multiple protrusions 30. The multiple protrusions 30 are arranged in a ring along the top edge of the valve body 3. The protrusions 30 are located between the valve cover 1 and the valve body 3. The protrusions 30 are conical. The side of the valve cover 1 facing the valve body 3 is flat. The protrusions 30 are used in conjunction with the valve cover 1 to clamp the cloth wrapped around the pillow core, thereby realizing the quick installation and fixation of the entire valve.

[0070] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0071] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A gas supply pipeline valve, characterized in that, The system includes a valve body (3), a rotary switch (2), and a valve core (8). The valve body (3) is provided with an inlet pipe (5) and multiple outlet pipes (6). The valve body (3) is provided with an airflow channel (31) and multiple valve core channels. The inlet pipe (5) and the outlet pipe (6) are both connected to the airflow channel (31). The valve core channels are arranged one-to-one with the outlet pipes (6). The valve core channels are connected to the corresponding outlet pipes (6) and the airflow channel (31). Each valve core channel is provided with a valve core (8). Each valve core (8) is provided with a rotary switch (2). The rotary switch (2) is rotatably disposed outside the valve body (3). The valve core (8) is used to control the opening and closing of the corresponding valve core channel. The valve core (8) includes a valve stem (17), a stud (18) and a valve plug (19). The stud (18) and the valve plug (19) are respectively disposed at the top and bottom of the valve stem (17). The stud (18) is threadedly connected to a rotary switch (2).

2. A gas supply pipeline valve according to claim 1, characterized in that, The number of the air outlet pipe (6) and the number of the valve core channel are both two. The airflow channel (31) is arranged along the length direction of the valve body (3). The two air outlet pipes (6) are both arranged at the bottom of the valve body (3). The two valve core channels are respectively arranged at both ends of the airflow channel (31). The two air outlet pipes (6) and the two valve core channels are arranged one-to-one. The air inlet pipe (5) is arranged at the top of the valve body (3) and the air inlet pipe (5) is located in the middle of the airflow channel (31).

3. A gas supply pipeline valve according to claim 2, characterized in that, The valve core channel includes a valve stem channel (26) and a valve cavity (32). The valve cavity (32) is located at the bottom end of the valve stem channel (26). The valve cavity (32) is connected to the airflow channel (31). The bottom end of the valve cavity (32) is provided with an air outlet, and the air outlet is connected to the corresponding air outlet pipe (6). The top end of the valve stem channel (26) penetrates the valve body (3). The valve stem (17) is slidably connected to the valve stem channel (26), and the valve plug (19) is slidably disposed in the valve cavity (32). The valve plug (19) is used to control the opening and closing of the air outlet.

4. A gas supply pipeline valve according to claim 3, characterized in that, It also includes a valve cover (1), which is disposed on the top of the valve body (3), and the rotary switch (2) is rotatably connected to the valve cover (1).

5. A gas supply pipeline valve according to claim 4, characterized in that, The valve cover (1) is provided with two switch mounting holes (21), and the two switch mounting holes (21) are provided in correspondence with the two valve cores (8), and each switch mounting hole (21) is provided with a rotary switch (2).

6. A gas supply pipeline valve according to claim 5, characterized in that, The bottom of the valve cover (1) is provided with two receiving grooves (24), and the two receiving grooves (24) are respectively provided in correspondence with the two switch mounting holes (21); The rotary switch (2) includes a knob (9), a rod (10) and a stop (11). The knob (9) and the stop (11) are respectively located at the top and bottom of the rod (10). The rod (10) has a threaded hole (12) that matches the stud (18). The two ends of the rotary rod (10) pass through the corresponding switch mounting holes (21), and each of the receiving grooves (24) is provided with a limiting member (7), which is sleeved on the corresponding rotary rod (10).

7. A gas supply pipeline valve according to claim 6, characterized in that, The receiving groove (24) has an opening on one side, and snap-fit ​​posts (25) are provided on both sides of the opening. The limiting member (7) includes a first limiting member (13) and a second limiting member (14). Both the first limiting member (13) and the second limiting member (14) are C-shaped and form a ring structure when they are together. The second limiting member (14) has two elastic arms (15) on the side away from the first limiting member (13). The two elastic arms (15) are arranged parallel to each other, and the end of the elastic arm (15) away from the second limiting member (14) is provided with a slot (16). The slot (16) is matched with the locking post (25).

8. A gas supply pipeline valve according to claim 3, characterized in that, The valve stem (17) is provided with a limiting protrusion (20), and the valve stem channel (26) is provided with a limiting groove (27) along its length direction. The limiting protrusion (20) and the limiting groove (27) are matched and configured to match each other.

9. A gas supply pipeline valve according to claim 4, characterized in that, The valve cover (1) is provided with a through hole (22) and a plurality of first mounting holes (4). The bottom of the valve cover (1) is provided with a plurality of positioning holes (23). The through hole (22) and the first mounting holes (4) both penetrate the valve cover (1). The through hole (22) and the air inlet pipe (5) are arranged corresponding to each other. The air inlet pipe (5) penetrates the through hole (22) and extends to the outside of the valve cover (1). The valve body (3) has multiple second mounting holes (29) and multiple positioning pins (28) on its top. The second mounting holes (29) and the first mounting holes (4) are arranged in a one-to-one correspondence, and the positioning pins (28) and the positioning holes (23) are arranged in a one-to-one correspondence.

10. A gas supply pipeline valve according to claim 4, characterized in that, The valve body (3) has a plurality of protrusions (30) on its top. The plurality of protrusions (30) are arranged in a ring along the top edge of the valve body (3) in sequence, and the protrusions (30) are located between the valve cover (1) and the valve body (3).

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