Cylinder valve with safety protection device

Abstract

The invention relates to the field of gas cylinder valves, in particular to a gas cylinder valve with a safety protection device, which comprises a supporting component and a cylinder body, the cylinder body is provided with a gas cylinder valve body, the gas cylinder valve body is fixedly connected with a bearing plate, and the bearing plate is fixedly connected with a mounting box with an open outer end. A pipeline connected with the cylinder valve body is arranged in the mounting box; the protection component comprises a sealing frame arranged on the inner wall of the mounting box, the sealing frame is provided with a sealing part for sealing the mounting box, the mounting box is provided with a locking part for preventing the sealing part from loosening, two sliding grooves are formed in the mounting box, and power parts are arranged in the sliding grooves; a mounting cavity is formed in the bearing plate, a warning part is arranged in the mounting cavity, and a transmission part for providing power for the warning part is arranged in the mounting cavity. When the high-pressure energy storage steel cylinder is continuously deflated, gas leakage is continuously monitored, and it can be avoided that gas is directly exhausted, and the health of people is affected.

Description

Technical Field

[0001] The present invention relates to the field of gas cylinder valves, and in particular to a gas cylinder valve with a safety protection device. Background Art

[0002] A gas cylinder is a common device for storing gases, and it stores various types of gases, including carbon dioxide, argon, oxygen, etc. A valve is provided on the high-pressure gas cylinder for docking with a pipeline. During use, the gas cylinder valve is connected to the pipeline, and then the valve stem on the valve is rotated to use it.

[0003] During the use process, due to the high air pressure in the gas cylinder and also high air pressure during pipeline connection and exhaust, leakage is likely to occur at the connection between the pipeline and the gas cylinder valve. Although a handheld instrument is used for airtightness detection during connection, it is difficult to continuously monitor during the continuous gas release process, so it is inevitable that gas leakage goes unnoticed, which may cause danger (if it is carbon dioxide, etc., it is easy to cause dizziness due to high carbon dioxide concentration in a small space). Although electronic devices (such as sensors) can also detect leakage, it is difficult to provide a continuous power supply on the steel cylinder and an external power supply is required, so the use has great limitations. Summary of the Invention

[0004] In view of the problem that in the above or existing technologies, without using electronic devices, it is difficult to continuously monitor during the continuous supply of carbon dioxide by the gas cylinder, so it is inevitable that carbon dioxide leakage goes unnoticed, which may cause danger, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: It includes a support component, including a cylinder body, on which a gas cylinder valve body is provided. A bearing plate is fixedly connected to the gas cylinder valve body, and an installation box with an open outer end is fixedly connected to the bearing plate. A pipeline connected to the gas cylinder valve body is provided in the installation box; a protection component, including a sealing frame provided on the inner wall of the installation box, a sealing part for closing the installation box is provided on the sealing frame, a locking part for preventing the sealing part from loosening is provided on the installation box, two sliding grooves are provided in the installation box, and a power part is provided in the sliding groove; an installation cavity is provided in the bearing plate, a warning part is provided in the installation cavity, and a transmission part for providing power to the warning part is provided in the installation cavity; an impact component, including an installation frame provided in the installation cavity, an impact part for emitting a sound warning is provided on the installation frame, a guiding part for guiding the impact part is provided in the installation cavity, and a one-way part is provided in the guiding part.

[0006] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the sealing part includes two rotating shafts fixedly connected to the installation box, and sealing plates are rotatably connected to both of the two rotating shafts. A semi-circular opening adapted to the pipeline is provided on the sealing plate, an elastic sealing ring is provided in the semi-circular opening, and a sealing block adapted to the sealing frame is fixedly connected to the sealing plate.

[0007] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the locking part includes two through openings fixedly connected to the installation box, a U-shaped plate is fixedly connected to the installation box, the U-shaped plate is elastically connected to the outer wall of the installation box through a first spring, and the U-shaped plate is completely located outside the sealing frame.

[0008] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the power part includes a piston sealingly and slidably connected in the sliding groove, and the piston is elastically connected to the inner wall of the sliding groove through a second spring.

[0009] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the warning part includes an observation opening provided in the installation cavity, a transmission shaft is rotatably connected in the installation cavity, a display column is fixedly connected to the transmission shaft, the outer end of the display column extends into the observation opening, and a plurality of display plates are provided on the display column.

[0010] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: a sandwich layer is provided in the display plate, and a phosphor with a different color from that is filled in the sandwich layer.

[0011] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the transmission part includes a communication cavity communicating with the installation cavity, the communication cavity communicates with the sliding groove, a rack fixedly connected to the piston is slidably connected in the communication cavity, and a gear meshing with the rack is fixedly connected to the transmission shaft.

[0012] As a preferred embodiment of the gas cylinder valve with a safety protection device according to the present invention, wherein: the impact part is a slider slidably connected in the installation frame, an impact column is fixedly connected to the slider, a round opening for the impact column to pass through is provided on the installation frame, and the slider is elastically connected to the inner wall of the installation frame through a third spring.

[0013] As a preferred embodiment of the gas cylinder valve with a safety protection device of the present invention, the following is provided: The guiding portion includes a lever fixedly connected to the slider. A first guiding groove is provided in the communication cavity. An inclined groove is communicatively provided on the first guiding groove. A transverse groove is provided on the inclined groove. A second guiding groove is provided on the transverse groove. A reset groove communicatively connected to the first guiding groove is provided on the transverse groove. The reset groove is located on the right side of the second guiding groove and the transverse groove. Multiple transverse grooves, inclined grooves, and second guiding grooves are provided. The inclined grooves, transverse grooves, and second guiding grooves are arranged in sequence as a group. The length of the rearmost transverse groove is greater than that of the front transverse groove. The length of the foremost inclined groove is greater than that of the rear inclined groove. An impact plate cooperating with the impact column is elastically connected in the communication cavity through a telescopic spring. An inclined side is provided on the impact plate. The elasticity of the third spring is greater than that of the telescopic spring.

[0014] As a preferred embodiment of the gas cylinder valve with a safety protection device of the present invention, the following is provided: The one-way portion includes an outward expansion groove provided in the reset groove. A support shaft is rotatably connected in the outward expansion groove. A stopper extending to the connection between the reset groove and the first guiding groove is rotatably connected to the support shaft. A torsion spring is provided on the support shaft. One side wall of the stopper abuts against the inner wall of the outward expansion groove.

[0015] The beneficial effects of the gas cylinder valve with a safety protection device of the present invention are as follows: By providing a protection component, when the pipeline is not connected, the outside of the air outlet of the gas cylinder valve body can be closed to avoid leakage during transportation. After the pipeline is connected, once air leakage occurs, the gas will not leak out, but will push the piston to move, causing the color of the display board to change. Thus, it can be determined whether there is air leakage according to the color change. At the same time, through the impact component, during the process of the color change of the display board, a collision sound can be emitted to give a warning, making the prompt effect better. Therefore, the problem that it is difficult to continuously monitor during the continuous supply of carbon dioxide by the energy storage steel cylinder without using electronic equipment, and it is inevitable that gas leakage occurs without being aware of it, thus causing danger, is solved. The effect of avoiding gas leakage at the pipeline connection and automatically continuously monitoring during exhaust is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the external structure of a gas cylinder valve with a safety protection device.

[0018] Figure 2Schematic cross-sectional structure diagram of the installation box for a gas cylinder valve with a safety protection device.

[0019] Figure 3 Exploded view of the sealing part of a gas cylinder valve with a safety protection device.

[0020] Figure 4 First schematic cross-sectional structure diagram of the warning part of a gas cylinder valve with a safety protection device.

[0021] Figure 5 Second schematic cross-sectional structure diagram of the warning part of a gas cylinder valve with a safety protection device

[0022] Figure 6 Schematic cross-sectional structure diagram of the transmission part of a gas cylinder valve with a safety protection device.

[0023] Figure 7 Schematic external structure diagram of the impact part of a gas cylinder valve with a safety protection device.

[0024] Figure 8 Front view of the guiding part of a gas cylinder valve with a safety protection device.

[0025] Figure 9 For Figure 8 Enlarged schematic diagram of the structure at position A.

[0026] Figure 10 Side view of the one-way part of a gas cylinder valve with a safety protection device.

[0027] In the figure: 10, gas cylinder body; 11, gas cylinder valve body; 12, bearing plate; 13, installation box; 14, pipeline; 20, sealing frame; 21, sealing part; 211, sealing plate; 212, semi-circular opening; 213, elastic sealing ring; 214, sealing block; 22, locking part; 221, U-shaped plate; 222, first spring; 23, sliding groove; 24, power part; 241, piston; 242, second spring; 25, installation cavity; 26, warning part; 261, observation port; 262, transmission shaft; 263, display column; 264, display board; 265, interlayer; 27, transmission part; 271, communication cavity; 272, toothed plate; 273, gear; 30, installation frame; 31, impact part; 311, slider; 312, impact column; 313, third spring; 32, guiding part; 321, lever; 322, first guiding groove; 323, inclined groove; 324, transverse groove; 325, second guiding groove; 326, reset groove; 327, impact plate; 328, bevel edge; 33, one-way part; 331, outward expansion groove; 332, stop block; 333, torsion spring. Specific implementation manners

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings of the specification.

[0029] Example 1. Refer to Figures 1 to 8 , which is the first embodiment of the present invention. This embodiment provides a gas cylinder valve with a safety protection device, which can achieve continuous monitoring of the leakage at the docking part of the gas cylinder valve body 11 and the pipeline 14 without power components. It includes a support component, including a cylinder body 10, on which a gas cylinder valve body 11 is provided. A bearing plate 12 is fixedly connected to the gas cylinder valve body 11, and an installation box 13 with an open outer end is fixedly connected to the bearing plate 12. A pipeline 14 connected to the gas cylinder valve body 11 is arranged in the installation box 13; a protection component, including a sealing frame 20 arranged on the inner wall of the installation box 13, a sealing part 21 for closing the installation box 13 is provided on the sealing frame 20, a locking part 22 for preventing the sealing part 21 from loosening is provided on the installation box 13, and two sliding grooves 23 are arranged in the installation box 13, and a power part 24 is arranged in the sliding grooves 23; a collision part 31, including an installation frame 30 arranged in the installation cavity 25, an impact part 31 for emitting a sound warning is provided on the installation frame 30, a guiding part 32 for guiding the impact part 31 is arranged in the installation cavity 25, and a one-way part 33 is arranged in the guiding part 32.

[0030] Specifically, a turntable is provided on the gas cylinder valve body 11 here, which is used to control the on-off of the gas cylinder valve body 11. At the same time, the part where the gas cylinder valve is docked with the pipeline 14 is inside the installation box 13, and the outer end of the pipeline 14 extends to the outside of the installation box 13. Openings are provided on both the bearing plate 12104 and the installation box 13 for the pipeline 14 to pass through. Here, the installation box 13 is fixedly connected to the bearing plate 12, and the front end of the installation box 13 is open for the connection of the pipeline 14.

[0031] Furthermore, the sealing part 21 includes two rotating shafts fixedly connected to the installation box 13. Sealing plates 211 are rotatably connected to both rotating shafts. A semi-circular opening 212 matching the pipeline 14 is provided on the sealing plate 211. An elastic sealing ring 213 is arranged in the semi-circular opening 212, and a sealing block 214 matching the sealing frame 20 is fixedly connected to the sealing plate 211; the locking part 22 includes two through openings fixedly connected to the installation box 13. A U-shaped plate 221 is fixedly connected to the installation box 13. The U-shaped plate 221 is elastically connected to the outer wall of the installation box 13 through a first spring 222, and the U-shaped plate 221 is completely outside the sealing frame 20; the power part 24 includes a piston 241 that is hermetically slidably connected in the sliding groove 23. The piston 241 is elastically connected to the inner wall of the sliding groove 23 through a second spring 242.

[0032] Among them, when the sealing plate 211 is closed, the inner wall of the sealing plate 211 abuts against the sealing frame 20 for sealing. The semi-circular opening 212 here can cooperate with the external pipeline 14, and an elastic sealing gasket is arranged on the inner wall of the semi-circular opening 212, so as to ensure the sealing effect. The setting of the sealing block 214 can fill the gap between the sealing plate 211 and the sealing frame 20 and strengthen the sealing effect. The U-shaped plate 221 is completely outside the sealing frame 20 and will not affect the sealing performance of the installation box 13. A hand-pulling groove is provided on the sealing plate 211 for opening the sealing plate 211. During transportation, a sealing plug is arranged in the semi-circular opening 212, so that the pipeline 14 is in a sealed area and will not leak.

[0033] Preferably, the warning part 26 includes an observation port 261 arranged in the installation cavity 25. A transmission shaft 262 is rotatably connected in the installation cavity 25. A display column 263 is fixedly connected to the transmission shaft 262. The outer end of the display column 263 extends into the observation port 261. A plurality of display plates 264 are arranged on the display column 263; a sandwich layer 265 is arranged in the display plate 264, and a phosphor with a different color from the display plate 264 is filled in the sandwich layer 265; the transmission part 27 includes a communication cavity 271 communicated with the installation cavity 25. The communication cavity 271 is communicated with the sliding groove 23. A toothed plate 272 fixed to the piston 241 is slidably connected in the communication cavity 271. A gear 273 meshing with the toothed plate 272 is fixedly connected to the transmission shaft 262.

[0034] It should be noted that the outer end of the display column 263 extends into the observation port 261, so that the display plate 264 in the observation port 261 can be directly observed. Here, a plurality of display plates 264 with different colors can be used to understand the amount of air leakage and reflect the degree of air leakage according to the color of the observed display plate 264.

[0035] During use, first connect the pipeline 14, and then pull the U-shaped plate 221 upward so that the U-shaped plate 221 moves upward and the first spring 222 elongates. When the sealing plate 211 passes over the U-shaped plate 221, release the U-shaped plate 221. The U-shaped plate 221 returns to its original position under the action of the first spring 222. At this time, the side wall of the U-shaped plate 221 abuts against the sealing plate 211 to limit the sealing plate 211 and prevent the sealing plate 211 from loosening and affecting the sealing effect. When the sealing plate 211 needs to be opened, just pull the U-shaped plate 221 so that the U-shaped plate 221 moves to the upper side of the sealing plate 211, and then the sealing plate 211 can be pulled to open the sealing plate 211;

[0036] When a gas leak occurs at the connection of the pipeline 14, the gas accumulates in the installation box 13. On the one hand, the gas is stored in the installation box 13 and will not disperse into the air, thus not affecting human health. At the same time, the accumulation of gas in the installation box 13 causes the air pressure in the installation box 13 to rise (since the air pressure in the steel pressure energy storage cylinder is relatively high and it will keep exhausting), which makes the piston 241 move and the second spring 242 compress. When the piston 241 moves, it can push the toothed plate 272 to move, thereby making the gear 273 rotate and the transmission shaft 262 rotate. The display board 264 in the observation port 261 changes. According to the different colors of the display board 264 in the observation port 261, the degree of the leaked gas can be clearly understood. At the same time, a fluorescent layer is provided in the display board 264 here, so that it can be well displayed at night. It should be noted that a branch pipe can be provided on the side wall of the installation box 13, and when a gas leak occurs, the gas can be pumped out through the branch pipe for proper treatment. It should be noted that the display board 264 here is a transparent acrylic board, so that the color of the fluorescent powder can be directly displayed and the color can be observed at night.

[0037] In summary, by setting the protection component, when a gas leak occurs, on the one hand, it can prevent the gas from leaking out, and on the other hand, when a gas leak occurs, the speed and amount of the gas leak can be displayed through the change of the color of the display board 264 in the observation port 261. Thus, continuous monitoring of the gas leak can be carried out without relying on electronic components.

[0038] Example 2, refer to Figures 1 to 10, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides an impact part 31 of a gas cylinder valve with a safety protection device, which solves the problem of how to further enhance the warning effect. The impact part 31 is slidably connected to a slider 311 within a mounting frame 30. A striking post 312 is fixedly connected to the slider 311. The mounting frame 30 is provided with a round opening for the striking post 312 to pass through. The slider 311 is elastically connected to the inner wall of the mounting frame 30 by a third spring 313. The guiding part 32 includes a lever 321 fixedly connected to the slider 311. A first guiding groove 322 is provided within the communication cavity 271. An inclined groove 323 is communicatively provided on the first guiding groove 322. A transverse groove 324 is provided on the inclined groove 323. A second guiding groove 325 is provided on the transverse groove 324. A reset groove 326 communicating with the first guiding groove 322 is provided on the transverse groove 324. The reset groove 326 is located on the right side of the second guiding groove 325 and the transverse groove 324. Multiple transverse grooves 324, inclined grooves 323, and second guiding grooves 325 are provided. The inclined grooves 323, transverse grooves 324, and second guiding grooves 325 are arranged in sequence as a group. The length of the last transverse groove 324 is greater than that of the front transverse groove 324. The length of the frontmost inclined groove 323 is greater than that of the rear inclined groove 323. An impact plate 327 cooperating with the striking post 312 is elastically connected within the communication cavity 271 by a telescopic spring. A bevel edge 328 is provided on the impact plate 327. The elasticity of the third spring 313 is greater than that of the telescopic spring.

[0039] Specifically, the striking post 312 cooperates with the impact plate 327 to be able to produce a sound. The setting of the bevel edge 328 here avoids the phenomenon of the striking post 312 getting stuck. The reset groove 326 communicates with the uppermost transverse groove 324, so that the reset groove 326 is located outside multiple second guiding grooves 325. The setting of the telescopic spring enables the impact plate 327 to generate a little displacement, thus avoiding the phenomenon of the striking post 312 being stuck with the impact plate 327 during reset.

[0040] Furthermore, the one-way part 33 includes an outward expansion groove 331 provided within the reset groove 326. A support shaft is rotatably connected within the outward expansion groove 331. A stopper 332 extending to the connection between the reset groove 326 and the first guiding groove 322 is rotatably connected to the support shaft. A torsion spring 333 is provided on the support shaft. One side wall of the stopper 332 abuts against the inner wall of the outward expansion groove 331.

[0041] It should be noted that one side wall of the stopper 332 abuts against the inner wall of the outward expansion groove 331, making the stopper 332 unable to deflect upward and only able to deflect downward. Thus, the lever 321 can move from the reset groove 326 into the first guiding groove 322 and cannot move from the first guiding groove 322 into the reset groove 326, ensuring the one-way movement of the lever 321.

[0042] During use, when the toothed plate 272 moves towards the gear 273, it can drive the mounting frame 30 to move towards the gear 273. At this time, the slider 311 is driven to move, causing the lever 321 to move towards the gear 273. At this time, due to the setting of the inclined side 328 and the position of the impact plate 327 shifting slightly, the phenomenon that the impact column 312 gets stuck with the impact plate 327 will not occur. The lever 321 first slides in the first guiding groove 322. When it slides to the connection of the first guiding groove 322 and the inclined groove 323 and continues to move, since the stopper 332 cannot deflect upwards, the lever 321 moves into the inclined groove 323. At this time, the lever 321 moves away from the impact plate 327, and the third spring 313 is compressed. When the lever 321 moves to the connection of the transverse groove 324 and the inclined groove 323, under the action of the third spring 313, the slider 311 quickly resets, driving the impact column 312 to quickly impact the impact plate 327 to make a sound, improving the warning effect. When the lever 321 is in the second guiding groove 325, the impact column 312 collides with the impact plate 327. At this time, the third spring 313 is still in a partially compressed state. It should be noted that the elasticity of the third spring 313 here is greater than that of the telescopic spring. Thus, during the impact, the impact force of the impact column 312 can cause the telescopic spring to contract rapidly, resulting in the impact column 312 separating from the impact plate 327 by a small distance after the impact, and then the telescopic spring rebounds. The telescopic spring will reciprocate several times, making the sound produce multiple sounds and the volume decreasing from strong to weak, making the warning effect better;

[0043] As the lever 321 continues to move, the lever 321 moves into the second guiding groove 325 to adjust the position of the lever 321. Since the inclined groove 323, the transverse groove 324, and the second guiding groove 325 are arranged in sequence as a group, as the lever 321 moves, the impact column 312 intermittently collides with the impact plate 327, continuously giving warnings. When the lever 321 moves to the uppermost transverse groove 324, at this time, under the action of the third spring 313, the lever 321 moves into the reset groove 326. Since the reset groove 326 is located outside the second guiding groove 325, the third spring 313 can be fully reset. And because the elasticity of the third spring 313 is greater than that of the telescopic spring, the lever 321 will not slide in the transverse groove 324. An arc edge can also be set in the transverse groove 324 to ensure that when the lever 321 resets, it can enter the reset groove 326 and finally return to the first guiding groove 322.

[0044] In summary, by setting the impact component, during the process of the gear 273 pushing the toothed plate 272, the impact column 312 can also be driven to intermittently collide with the impact plate 327, thereby being able to make a collision sound for warning, making the reminder and warning effect better and enabling the user to more easily detect air leakage.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A gas cylinder valve with a safety protection device, characterized in that: include, The supporting component comprises a bottle body (10), the bottle body (10) is provided with a gas cylinder valve body (11), the gas cylinder valve body (11) is fixedly connected with a bearing plate (12), the bearing plate (12) is fixedly connected with a mounting box (13) with an open outer end, and the mounting box (13) is provided with a pipeline (14) connected with the gas cylinder valve body (11); The protective component comprises a sealing frame (20) arranged on the inner wall of the installation box (13), the sealing frame (20) being provided with a sealing portion (21) for sealing the installation box (13), the installation box (13) being provided with a locking portion (22) for preventing the sealing portion (21) from loosening, the installation box (13) being provided with two sliding grooves (23), the sliding grooves (23) being provided with a power portion (24); the bearing plate (12) being provided with a mounting cavity (25), the mounting cavity (25) being provided with a warning portion (26), and the mounting cavity (25) being provided with a transmission portion (27) for providing power to the warning portion (26); The impact component comprises a mounting frame (30) arranged in a mounting cavity (25), the mounting frame (30) being provided with an impact portion (31) for emitting a sound warning, the mounting cavity (25) being provided with a guide portion (32) for guiding the impact portion (31), and the guide portion (32) being provided with a one-way portion (33).

2. The gas cylinder valve with a safety protection device according to claim 1, characterized in that: The sealing portion (21) comprises two rotating shafts fixedly connected to the installation box (13), and sealing plates (211) are rotatably connected to the two rotating shafts. The sealing plate (211) is provided with a semicircular opening (212) that cooperates with the pipeline (14), and an elastic sealing ring (213) is provided in the semicircular opening (212). The sealing plate (211) is fixedly connected with a sealing block (214) that cooperates with the sealing frame (20).

3. The gas cylinder valve with a safety protection device as claimed in claim 2, characterized in that: The locking portion (22) comprises two through openings fixedly connected to the installation box (13); a U-shaped plate (221) is fixedly connected to the installation box (13); the U-shaped plate (221) is elastically connected to the outer wall of the installation box (13) via a first spring (222); and the U-shaped plate (221) is completely located outside the sealing frame (20).

4. The gas cylinder valve with a safety protection device as claimed in claim 3, characterized in that: The power unit (24) comprises a piston (241) which is sealingly and slidingly connected in the sliding groove (23); the piston (241) is elastically connected to the inner wall of the sliding groove (23) via a second spring (242).

5. The gas cylinder valve with a safety protection device as claimed in claim 4, characterized in that: The warning portion (26) comprises an observation port (261) arranged in the installation cavity (25); a transmission shaft (262) is rotatably connected in the installation cavity (25); a display column (263) is fixedly connected to the transmission shaft (262); an outer end of the display column (263) extends into the observation port (261); and a plurality of display panels (264) are provided on the display column (263).

6. The gas cylinder valve with a safety protection device as claimed in claim 5, characterized in that: The display board (264) is provided with an interlayer (265), and the interlayer (265) is filled with fluorescent powder of different colors.

7. The gas cylinder valve with a safety protection device as claimed in claim 6, characterized in that: The transmission part (27) comprises a connecting cavity (271) connected to the installation cavity (25), the connecting cavity (271) being connected to the sliding groove (23), a tooth plate (272) fixed to the piston (241) being slidably connected in the connecting cavity (271), and a gear (273) meshing with the tooth plate (272) being fixedly connected to the transmission shaft (262).

8. The gas cylinder valve with a safety protection device as claimed in claim 7, characterized in that: The impact part (31) is slidably connected to a slider (311) in the installation frame (30); an impact column (312) is fixedly connected to the slider (311); a circular opening for the impact column (312) to pass through is provided on the installation frame (30); and the slider (311) is elastically connected to the inner wall of the installation frame (30) via a third spring (313).

9. The gas cylinder valve with a safety protection device as claimed in claim 8, characterized in that: The guide portion (32) comprises a lever (321) fixedly connected to the slider (311); a first guide groove (322) is provided in the communication cavity (271); an inclined groove (323) is connected to the first guide groove (322); a transverse groove (324) is provided on the inclined groove (323); a second guide groove (325) is provided on the transverse groove (324); a reset groove (326) is provided on the transverse groove (324) and is connected to the first guide groove (322); the reset groove (326) is located on the right side of the second guide groove (325) and the transverse groove (324); the transverse groove (324) and the inclined groove (323) are connected to the first guide groove (322); A plurality of grooves (323) and second guide grooves (325) are provided, and the oblique groove (323), transverse groove (324), and second guide groove (325) are arranged in sequence as a group, the length of the transverse groove (324) at the rear end is greater than the length of the transverse groove (324) at the front end, and the length of the oblique groove (323) at the front end is greater than the length of the oblique groove (323) at the rear end, and the connecting cavity (271) is elastically connected to an impact plate (327) that cooperates with the impact column (312) through a telescopic spring, and the impact plate (327) is provided with a bevel (328), and the elasticity of the third spring (313) is greater than the elasticity of the telescopic spring.

10. The gas cylinder valve with a safety protection device according to claim 9, characterized in that: The one-way portion (33) comprises an outwardly expanding groove (331) arranged in the reset groove (326), a support shaft being rotatably connected in the outwardly expanding groove (331), a stopper (332) being rotatably connected on the support shaft and extending to the connection between the reset groove (326) and the first guide groove (322), a torsion spring (333) being provided on the support shaft, and a side wall of the stopper (332) being abutted against the inner wall of the outwardly expanding groove (331).

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