Cylinder valve with low-pressure alarm function

Abstract

The utility model provides a cylinder valve with a low-pressure alarm function, which comprises a valve body, an air inlet channel and an air outlet channel are longitudinally arranged in the valve body, a right valve cavity, a left valve cavity and a ventilation flow channel are transversely arranged in the valve body, the ventilation flow channel is used for communicating the right valve cavity with the left valve cavity, one end of the air inlet channel is communicated with the right valve cavity, and one end of the air outlet channel is communicated with the left valve cavity. The air inlet control component comprises a first valve head and a first valve head control assembly, the first valve head is arranged in the right valve cavity, the first valve head control assembly is used for driving the first valve head to move left and right in the right valve cavity, the air outlet control component comprises a second valve head and a second valve head control assembly, and the second valve head is arranged in the left valve cavity. The second valve head control assembly is used for controlling the second valve head to move left and right in the left valve cavity. The diver does not need to pay attention to the residual gas pressure all the time and does not need to check the handheld pressure gauge all the time, and therefore convenience and safety are guaranteed when the diver dives.

Description

Technical Field

[0001] The utility model relates to the technical field of diving cylinder accessories, and particularly relates to a cylinder valve with a low air pressure alarm function. Background Art

[0002] When divers carry out operations such as underwater exploration, salvage, repair and underwater engineering, they usually carry diving equipment, which includes cylinders for divers to work underwater. After the diver carries the cylinder underwater, the gas in the cylinder will be continuously consumed with breathing. When the pressure drops below the critical value, the air supply will stop. Therefore, divers need to know the remaining pressure of the cylinder to ensure that there is a certain margin of safety pressure, that is, 3.5 ± 0.5 MPa, in the cylinder before the diver returns to the water surface. If the reserved pressure is insufficient, especially when the diving depth is relatively deep, it will cause the cylinder gas storage to be used up in advance, resulting in asphyxiation danger and diving accidents.

[0003] According to the "Safety Requirements for Air Diving" and the self - contained diving technical specifications, the conventional way to monitor the cylinder pressure in the prior art is to install a pressure gauge on the cylinder output pipeline, and the diver visually obtains the remaining gas pressure of the cylinder. However, this method has the following disadvantages:

[0004] 1. Divers need to constantly pay attention to the remaining gas pressure, resulting in great mental pressure.

[0005] 2. When diving in waters with low visibility, divers need to hold the pressure gauge close to their eyes to see clearly, which is very inconvenient. Content of the Utility Model

[0006] The utility model is made to solve the above problems, and its purpose is to provide a cylinder valve with a low air pressure alarm function.

[0007] The utility model provides a cylinder valve with a low air pressure alarm function, which has the following characteristics, including:

[0008] The valve body is in a cross - shaped shape. An air inlet channel and an air outlet channel are longitudinally arranged inside the valve body, a right valve cavity, a left valve cavity and an air flow channel for connecting the right valve cavity and the left valve cavity are transversely arranged. One end of the air inlet channel is communicated with the right valve cavity, and the other end is used for connecting with an inlet pipe. One end of the air outlet channel is communicated with the left valve cavity, and the other end is used for connecting with an outlet pipe.

[0009] The air inlet control component includes a first valve head and a first valve head control component. The first valve head is arranged in the right valve cavity, and the first valve head control component is used to drive the first valve head to move left and right in the right valve cavity, so that the air inlet channel is communicated with the air flow channel through the right valve cavity.

[0010] The air outlet control component includes a second valve head and a second valve head control assembly. The second valve head is arranged in the left valve cavity, and the second valve head control assembly is used to control the left - right movement of the second valve head in the left valve cavity, so that the air flow passage is communicated with the air outlet passage through the left valve cavity.

[0011] In the gas cylinder valve with low - air - pressure alarm function provided by the present utility model, it can also have the following characteristics: The first valve head control assembly includes a first valve rod, a valve cover, a handwheel, a nut cover, and an elastic member. One end of the first valve rod extends into the right valve cavity and is connected to the first valve head, and the other end is located outside the right valve cavity. The valve cover is arranged on the first valve rod and is connected to the right end of the valve body in a matching manner for blocking the orifice of the right valve cavity. The handwheel is arranged on the first valve rod and is located on the right side of the valve cover. Grooves are provided on both end faces of the handwheel. The nut cover is arranged on the other end of the first valve rod and is located in the groove on the right end face of the handwheel. The elastic member is arranged between the nut cover and the bottom of the groove on the right end face of the handwheel.

[0012] Furthermore, the elastic member includes a first elastic member and a first elastic member cover for preventing the first elastic member from bending during the telescopic process. One end of the first elastic member is connected to the bottom of the groove on the right end face, and the other end is connected to the nut cover. The first elastic member cover is fixed on the nut cover and sleeved on the first elastic member.

[0013] Furthermore, the diameter of the groove on the left end face of the handwheel is equal to the diameter of the right end of the valve body, and the bottom of the groove on this left end face is in contact with the right outer wall of the valve cover.

[0014] In the gas cylinder valve with low - air - pressure alarm function provided by the present utility model, it can also have the following characteristics: The second valve head control assembly includes a second valve rod, an opening rod, a top rod, a second elastic member, and a control assembly.

[0015] The second valve rod is arranged in the left valve cavity, one end of which is connected to the second valve head, and the other end is connected to the opening rod.

[0016] The opening rod is arranged in the left valve cavity, and one end thereof is V - shaped.

[0017] The top rod is sleeved on the second valve rod. Two deep V - grooves and two shallow V - grooves are provided on the end of the top rod facing the opening rod along the axial direction. Both the two deep V - grooves and the two shallow V - grooves can be engaged with one end of the opening rod.

[0018] The second elastic member is sleeved on the second valve rod, one end of which is connected to the second valve head, and the other end is connected to the other end of the top rod.

[0019] A part of the control assembly is located in the left valve cavity and is connected to the other end of the opening rod, and another part of the control assembly is located outside the left valve cavity for controlling the rotation of the opening rod.

[0020] Furthermore, the control assembly includes a connecting rod, a screw cover, a signal handle, and a pull rod. One end of the connecting rod is connected to the opening rod. The screw cover is provided on the connecting rod and is cooperatively connected to the left end of the valve body to block the cavity opening of the left valve cavity. The signal handle is provided on the other end of the connecting rod and is located outside the left valve cavity. The signal handle is used to drive the opening rod to rotate through the connecting rod. The pull rod is provided on the signal handle and is used to pull the signal handle to rotate.

[0021] Functions and effects of utility models

[0022] According to the gas cylinder valve with low air pressure alarm function involved in the utility model, it has an automatic alarm structure. When the gas cylinder pressure drops to 3.5±0.5MPa, it will automatically remind the diver that the remaining gas volume is insufficient. At this time, the diver will feel shortness of breath and the inhalation resistance will increase. The diver should immediately ascend and exit the dive according to regulations. At the same time, the diver can also release the alarm state by pulling down the pull rod. At this time, the above-mentioned shortness of breath disappears and returns to normal, so that the diver does not need to pay attention to the remaining gas pressure at all times, and does not need to check the handheld pressure gauge at all times, thereby ensuring the convenience and safety of the diver when diving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0024] Figure 2 It is a structural schematic diagram of part of the second valve head control assembly when the utility model is in working state;

[0025] Figure 3 It is a structural schematic diagram of a part of the second valve head control assembly of the utility model when it is in a released state;

[0026] Figure 4 It is a schematic diagram of some control components of the utility model when it is in working state;

[0027] Figure 5 It is a schematic diagram of some control components of the utility model when it is in contact state.

[0028] Description of reference numerals:

[0029] 10. Valve body; 11. Intake passage; 12. Outlet passage; 13. Right valve cavity; 14. Left valve cavity; 15. Air flow passage; 20. Intake control component; 21. First valve head; 22. First valve stem; 23. Valve cover; 24. Handwheel; 25. Nut cover; 26. First elastic member; 27. First elastic member cover; 30. Outlet control component; 31. Second valve head; 32. Second valve stem; 33. Opening rod; 34. Thrust rod; 35. Second elastic member; 36. Connecting rod; 37. Screw cap; 38. Signal pull handle; 381. Third elastic member; 382. Second elastic member cover; 39. Pull rod; 40. Sealing and protecting member. Detailed implementation manner

[0030] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the following embodiments will specifically describe the present utility model in conjunction with the accompanying drawings.

[0031] Embodiment

[0032] Figure 1 is a cross-sectional schematic view of the present utility model, Figure 2 is a structural schematic view of part of the second valve head control assembly when the present utility model is in the working state, Figure 3 is a structural schematic view of part of the second valve head control assembly when the present utility model is in the released state, Figure 4 is a schematic view of part of the control assembly when the present utility model is in the working state, Figure 5 is a schematic view of part of the control assembly when the present utility model is in the contact state.

[0033] As Figures 1 to 5 shown, this embodiment provides a gas cylinder valve with a low-pressure alarm function, including: a valve body 10, an intake control component 20, an outlet control component 30, and a sealing and protecting assembly. Among them, the sealing and protecting assembly includes a plurality of sealing and protecting members 40 provided on each part or between adjacent parts. In this embodiment, the sealing and protecting member 40 can be in the shape of a pad, a ring, a column, etc., which can be better arranged on the parts or between adjacent parts, so as to achieve the protection and sealing effects.

[0034] As Figure 1As shown, the valve body 10 is in a cross shape. An air inlet passage 11 and an air outlet passage 12 are longitudinally formed inside the valve body 10. A right valve cavity 13, a left valve cavity 14, and an air flow passage 15 for communicating the right valve cavity 13 and the left valve cavity 14 are transversely formed. One end of the air inlet passage 11 communicates with the right valve cavity 13, and the other end is used to connect to an air inlet pipe. One end of the air outlet passage 12 communicates with the left valve cavity 14, and the other end is used to connect to an air outlet pipe. Among them, inside the valve body 10, inclined connecting air passages are formed between the air inlet passage 11 and the right valve cavity 13, and between the left valve cavity 14 and the air outlet passage 12, so as to communicate the air inlet passage 11 with the right valve cavity 13, and the left valve cavity 14 with the air outlet passage 12.

[0035] In this embodiment, both the right valve cavity 13 and the left valve cavity 14 are in a stepped hole structure. The end connected to the air flow passage 15 is a small-diameter section, and the other end is a large-diameter section. Among them, multiple stepped sections can be provided between the small-diameter section and the large-diameter section as needed. And, the diameters of the small-diameter sections of the right valve cavity 13 and the left valve cavity 14 are not less than the diameter of the air flow passage 15. The orifices of the right valve cavity 13 and the left valve cavity 14 are respectively located on the right end face and the left end face of the valve body 10.

[0036] In this embodiment, both ends of the air flow passage 15 can be set to be conical, so as to facilitate the first valve head 21 and the second valve head 31 to block the left and right ports of the air flow passage 15.

[0037] As Figure 1 shown, the air inlet control component 20 includes a first valve head 21 and a first valve head control assembly. The first valve head 21 is arranged in the right valve cavity 13. The first valve head control assembly is used to drive the first valve head 21 to move left and right in the right valve cavity 13, so that the air inlet passage 11 communicates with the air flow passage 15 through the right valve cavity 13. Among them, the first valve head control assembly includes a first valve rod 22, a valve cover 23, a hand wheel 24, a nut cover 25, and an elastic member. One end of the first valve rod 22 extends into the right valve cavity 13 and is connected to the first valve head 21, and the other end is located outside the right valve cavity 13. The valve cover 23 is arranged on the first valve rod 22 and is cooperatively connected to the right end of the valve body 10 for blocking the orifice of the right valve cavity 13. The hand wheel 24 is arranged on the first valve rod 22 and is located on the right side of the valve cover 23. Grooves are formed on both end faces of the hand wheel 24. The nut cover 25 is arranged on the other end of the first valve rod 22 and is located in the groove on the right end face of the hand wheel 24. The elastic member is arranged between the nut cover 25 and the bottom of the groove on the right end face of the hand wheel 24.

[0038] In this embodiment, the elastic member includes a first elastic member 26 and a first elastic member cover 27 for preventing the first elastic member 26 from bending during the telescopic process. One end of the first elastic member 26 is connected to the bottom of the groove on the right end face, and the other end is connected to the nut cover 25. The first elastic member cover 27 is fixed on the nut cover 25 and sleeved on the first elastic member 26. Wherein, the inner diameter of the first elastic member cover 27 is equal to or greater than the diameter of the elastic member.

[0039] In this embodiment, the first valve head 21 is in a stepped column shape, and its size is adapted to the inner cavity size of the right valve cavity 13, so that the first valve head 21 can move left and right in the right valve cavity 13. And a sealing protection member 40 is provided at the end of the first valve head 21 facing the air flow passage 15. The sealing protection member 40 is in a column shape, and its diameter is larger than the diameter of the air flow passage 15.

[0040] In this embodiment, a pad-shaped sealing protection member 40 is provided between the valve cover 23 and the bottom wall of the large-diameter section of the right valve cavity 13. A through hole with a stepped hole structure is formed in the valve cover 23. The first valve stem 22 has a stepped structure for cooperating with the through hole on the valve cover 23, and a ring-shaped sealing protection member 40 is provided between the stepped structure on the first valve stem 22 and the through hole.

[0041] In this embodiment, the diameter of the groove on the left end face of the handwheel 24 is equal to the diameter of the right end of the valve body 10, and the bottom of the groove on the left end face is in contact with the right outer wall of the valve cover 23. Wherein, a pad-shaped sealing protection member 40 is provided between the bottom of the left groove and the right outer wall of the valve cover 23.

[0042] As Figures 1 to 5As shown in the figure, the air outlet control component 30 includes a second valve head 31 and a second valve head control assembly. The second valve head 31 is disposed in the left valve cavity 14. The second valve head control assembly is used to control the left - right movement of the second valve head 31 in the left valve cavity 14, so that the air flow passage 15 is communicated with the air outlet passage 12 through the left valve cavity 14. Among them, the second valve head control assembly includes a second valve rod 32, an opening rod 33, a push rod 34, a second elastic member 35 and a control assembly. The second valve rod 32 is disposed in the left valve cavity 14, one end of which is connected to the second valve head 31, and the other end is connected to the opening rod 33. The opening rod 33 is disposed in the left valve cavity 14, and one end thereof is in a V - shape. The push rod 34 is sleeved on the second valve rod 32. Two deep V - grooves and two shallow V - grooves are formed in the end of the push rod 34 facing the opening rod 33 along the axial direction, and both the two deep V - grooves and the two shallow V - grooves can be engaged with one end of the opening rod 33. The second elastic member 35 is sleeved on the second valve rod 32, one end of which is connected to the second valve head 31, and the other end is connected to the other end of the push rod 34. A part of the control assembly is located in the left valve cavity 14 and is connected to the other end of the opening rod 33, and another part of the control assembly is located outside the left valve cavity 14 and is used to control the rotation of the opening rod 33. Specifically, the control assembly includes a connecting rod 36, a screw cap 37, a signal pull handle 38, and a pull rod 39. One end of the connecting rod 36 is connected to the opening rod 33. The screw cap 37 is disposed on the connecting rod 36 and is cooperatively connected to the left end of the valve body 10 for blocking the cavity opening of the left valve cavity 14. The signal pull handle 38 is disposed at the other end of the connecting rod 36 and is located outside the left valve cavity 14. The signal pull handle 38 is used to drive the opening rod 33 to rotate through the connecting rod 36. The pull rod 39 is disposed on the signal pull handle 38 and is used to pull the signal pull handle 38 to rotate.

[0043] In this embodiment, the second valve head 31 is in a frustum - of - cone shape, and the size of its largest part is not greater than the inner size of the left valve cavity 14, so that the second valve head 31 can move left - right in the right valve cavity 13. And a column - shaped sealing protection member 40 is provided at the end of the second valve head 31 facing the air flow passage 15, and its diameter is larger than the diameter of the air flow passage 15.

[0044] In this embodiment, a through - hole is provided inside the opening rod 33, and the other end of the second valve rod 32 is inserted into the through - hole inside the opening rod 33 and is fixed to the opening rod 33 by a screw.

[0045] In this embodiment, the push rod 34 is in a column shape, and the other end of the push rod 34 abuts against the bottom wall of the step inside the left valve cavity 14. A stepped hole is provided inside the push rod 34, the small - diameter section of the stepped hole is not less than the diameter of the second valve rod 32, and the large - diameter section is not less than the diameter of the second elastic member 35.

[0046] In this embodiment, two deep V-grooves are arranged longitudinally and oppositely at one end of the ejector rod 34, and two shallow V-grooves are arranged transversely and oppositely at one end of the ejector rod 34. In addition, the two deep V-grooves and the two shallow V-grooves are evenly arranged on one end face of the ejector rod 34 along its circumferential direction. So that if one end of the opening rod 33 is initially engaged with the two deep V-grooves, it will be engaged with the two shallow V-grooves after a 90° rotation.

[0047] In this embodiment, a pad-shaped sealing and protecting member 40 is provided between the screw cap 37 and the bottom wall of the large-diameter section of the left valve cavity 14. A through hole with a stepped hole structure is formed in the screw cap 37. The second valve rod 32 has a stepped structure for cooperating with the through hole in the screw cap 37, and a ring-shaped sealing and protecting member 40 is provided between the stepped structure on the second valve rod 32 and the through hole.

[0048] In this embodiment, the signal pull handle 38 has a connecting portion and a pulling portion. The connecting portion is columnar, is arranged on the second valve rod 32, and is located on the left side of the screw cap 37. Grooves are formed on both end faces of the connecting portion. The diameter of the groove on the right end face of the connecting portion is not less than the diameter of the screw cap 37, and the bottom of the groove on the right end face abuts against the left outer wall of the screw cap 37, and a pad-shaped sealing and protecting member 40 is provided therebetween. An end cap is provided at the other end of the second valve rod 32, and the diameter of the end cap is equal to the diameter of the groove on the left end face of the connecting portion. A third elastic member 381 is provided between the end cap and the bottom of the groove on the left end face, and a second elastic member cover 382 is provided outside the third elastic member 381. The pulling portion is arranged on the outer wall of the connecting portion in a plate shape, and a fixing hole is formed thereon.

[0049] In this embodiment, the pull rod 39 has a hook portion and a rod portion. The hook portion passes through the fixing hole on the pulling portion, so that the pull rod 39 is fixed on the signal pull handle 38.

[0050] In this embodiment, the first elastic member 26, the second elastic member 35, and the third elastic member 381 are preferably springs.

[0051] The working principle and the using process of the present utility model are as follows:

[0052] When the present utility model is in the working state, the V-shaped end of the opening rod 33 will be engaged with the two deep V-grooves on the ejector rod 34. At this time, since the position of the ejector rod 34 is fixed, the opening rod 33 will drive the valve rod towards the air flow passage 15, that is, move to the right, so that the second valve head 31 blocks the left port of the air flow passage 15. When the present utility model is in the released state, the V-shaped end of the opening rod 33 will be engaged with the two shallow V-grooves on the ejector rod 34 after a 90° rotation. At this time, since the position of the ejector rod 34 is fixed, the opening rod 33 will drive the valve rod to move to the left, so that the second valve head 31 moves away from the left port of the air flow passage 15, and the air flow passage 15 can be communicated with the air outlet passage 12 through the left valve cavity 14.

[0053] In use, first, the first valve stem 22 is driven by the handwheel 24 to drive the first valve head 21 to move to the right, so that the air inlet passage 11 is communicated with the air flow passage 15 through the right valve cavity 13. When the pressure in the gas cylinder is greater than 3.5 ± 0.5 MPa, the gas pressure from right to left in the valve body 10 is greater than the elastic force of the second elastic member 35, so that the gas can push open the second valve head 31, and thus the second valve head 31 moves away from the left port of the air flow passage 15, further ensuring that there is sufficient gas flow through the left valve cavity 14 into the air outlet passage 12 to ensure the normal and smooth breathing of the diver. When the pressure in the gas cylinder is less than 3.5 ± 0.5 MPa, the gas pressure from right to left in the valve body 10 is less than the elastic force of the second elastic member 35, so that the gas cannot push open the second valve head 31, and thus the gas cannot enter the air outlet passage 12 through the left valve cavity 14. Furthermore, the diver will obviously feel that the breathing is not smooth and the inhalation resistance increases. At this time, the diver can know that the pressure in the gas cylinder is less than 3.5 ± 0.5 MPa and needs to ascend and surface. Then the diver can pull the pull rod 39, drive the signal pull handle 38 to rotate 90° through the pull rod 39, and drive the opening rod 33 to rotate 90° through the connecting rod 36. When the opening rod 33 rotates 90°, the V-shaped end thereof will be engaged with the two shallow V-grooves on the ejector rod 34. At this time, since the position of the ejector rod 34 is fixed, the opening rod 33 will drive the valve stem to move to the left, so that the second valve head 31 moves away from the left port of the air flow passage 15. At this time, the gas can be communicated with the air outlet passage 12 through the left valve cavity 14. Furthermore, the breathing of the diver can become normal and smooth again.

[0054] Therefore, the present utility model has the following advantages compared with the current manual monitoring of the gas cylinder pressure:

[0055] 1. When using the present utility model, it can remind the diver when the gas cylinder pressure is insufficient, thus relieving the mental pressure of the diver;

[0056] 2. Improve the underwater work efficiency and avoid the previous embarrassing situation of constantly manually monitoring the pressure gauge;

[0057] 3. It can prevent errors and avoid the risks caused by misreading the pressure gauge due to underwater turbidity or the diver's mental tension;

[0058] 4. Rely on the traditional mechanical structure design for warning, with good reliability;

[0059] 5. The long pull rod 39 structure can facilitate the diver to easily switch between the working and releasing states, and when in the releasing state, the present utility model is used in the same way as an ordinary gas cylinder valve, thus being suitable for various working conditions.

[0060] Functions and effects of the embodiment

[0061] According to the gas cylinder valve with low air pressure alarm function involved in the utility model, it has an automatic alarm structure. When the gas cylinder pressure drops to 3.5±0.5MPa, it will automatically remind the diver that the remaining gas volume is insufficient. At this time, the diver will feel shortness of breath and the inhalation resistance will increase. The diver should immediately ascend and exit the dive according to regulations. At the same time, the diver can also release the alarm state by pulling down the pull rod. At this time, the above-mentioned shortness of breath disappears and returns to normal, so that the diver does not need to pay attention to the remaining gas pressure at all times, and does not need to check the handheld pressure gauge at all times, thereby ensuring the convenience and safety of the diver when diving.

[0062] The above implementation modes are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A gas cylinder valve with a low-pressure alarm function, characterized in that, Comprising: A valve body, which is in a cross shape. An intake passage and an exhaust passage are longitudinally formed inside the valve body. A right valve cavity, a left valve cavity and an air flow passage for communicating the right valve cavity and the left valve cavity are transversely formed inside the valve body. One end of the intake passage communicates with the right valve cavity, and the other end is used for connecting an intake pipe. One end of the exhaust passage communicates with the left valve cavity, and the other end is used for connecting an exhaust pipe. An intake control component, including a first valve head and a first valve head control assembly. The first valve head is arranged in the right valve cavity. The first valve head control assembly is used to drive the first valve head to move left and right in the right valve cavity, so that the intake passage communicates with the air flow passage through the right valve cavity. An exhaust control component, including a second valve head and a second valve head control assembly. The second valve head is arranged in the left valve cavity. The second valve head control assembly is used to control the second valve head to move left and right in the left valve cavity, so that the air flow passage communicates with the exhaust passage through the left valve cavity.

2. The gas cylinder valve with a low air pressure alarm function according to claim 1, wherein: Among them, The first valve head control assembly includes a first valve rod, a valve cover, a handwheel, a nut cover and an elastic member. One end of the first valve rod extends into the right valve cavity and is connected to the first valve head, and the other end is located outside the right valve cavity. The valve cover is arranged on the first valve rod and is connected to the right end of the valve body in a matching manner, and is used to block the orifice of the right valve cavity. The handwheel is arranged on the first valve rod and is located on the right side of the valve cover. Grooves are formed on both end faces of the handwheel. The nut cover is arranged on the other end of the first valve rod and is located in the groove on the right end face of the handwheel. The elastic member is arranged between the nut cover and the bottom of the groove on the right end face of the handwheel.

3. The gas cylinder valve with a low air pressure alarm function according to claim 1, wherein: Among them, The second valve head control assembly includes a second valve rod, an opening rod, a push rod, a second elastic member and a control assembly. The second valve rod is arranged in the left valve cavity. One end of it is connected to the second valve head, and the other end is connected to the opening rod. The opening rod is arranged in the left valve cavity, and one end of it is in a V shape. The push rod is sleeved on the second valve rod. Two deep V grooves and two shallow V grooves are formed on the end of the push rod facing the opening rod along the axial direction. Both the two deep V grooves and the two shallow V grooves can be engaged with one end of the opening rod. The second elastic member is sleeved on the second valve rod. One end of it is connected to the second valve head, and the other end is connected to the other end of the push rod. A part of the control assembly is located in the left valve cavity and is connected to the other end of the opening rod, and another part of the control assembly is located outside the left valve cavity and is used to control the opening rod to rotate.

4. The gas cylinder valve with a low air pressure alarm function according to claim 2, wherein: Among them, The elastic member includes a first elastic member and a first elastic member cover for preventing the first elastic member from bending during the telescopic process. One end of the first elastic member is connected to the bottom of the groove on the right end face, and the other end is connected to the nut cover. The first elastic member cover is fixed on the nut cover and sleeved on the first elastic member.

5. The gas cylinder valve with a low air pressure alarm function according to claim 2, wherein: Among them, The diameter of the groove on the left end face of the handwheel is equal to the diameter of the right end of the valve body, and the bottom of the groove on the left end face is in contact with the right outer wall of the valve cover.

6. The gas cylinder valve with a low air pressure alarm function according to claim 3, wherein: Among them, The control assembly includes a connecting rod, a screw cap, a signal pull handle, and a pull rod. One end of the connecting rod is connected to the opening rod. The screw cap is arranged on the connecting rod and is cooperatively connected to the left end of the valve body for blocking the orifice of the left valve cavity. The signal pull handle is arranged at the other end of the connecting rod and is located outside the left valve cavity. The signal pull handle is used to drive the opening rod to rotate through the connecting rod. The pull rod is arranged on the signal pull handle and is used to pull the signal pull handle to rotate.

Images