Quick response type gas regulating valve

Abstract

The utility model relates to the technical field of regulating valves, in particular to a quick response type gas regulating valve which comprises a regulating box, one side of the regulating box is communicated with a gas inlet pipe, the other side of the regulating box is communicated with a gas outlet pipe, the top of the regulating box is communicated with a connecting cylinder, and the top of the connecting cylinder is communicated with a gas collecting cylinder. A pressure relief assembly used for conducting pressure relief on coal gas in the adjusting box is arranged in the connecting cylinder, the pressure relief assembly comprises an air floating plate and a positioning plate, the air floating plate is connected into the connecting cylinder in a sliding mode, the positioning plate is installed in the bottom of the gas collecting cylinder, and the positioning plate is located on the top of the air floating plate. The gas pressure relief device and the gas pressure relief device are matched with each other, rapid pressure relief and real-time alarm feedback are achieved in the pressure relief process, smoothness and timeliness of gas pressure relief are guaranteed, meanwhile, it is guaranteed that an operator can get an immediate warning when the pressure is abnormal, and equipment failures or other safety problems are prevented.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, and in particular to a fast-response gas regulating valve. Background Technology

[0002] In the gas industry, gas regulating valves are key components that ensure the normal operation of gas transmission systems. They are widely used in gas pipelines, gas equipment, and various industrial applications. They can accurately control the flow and pressure of gas, ensuring the stability and safety of the system. With the increasing demand for gas and the continuous development of industrialization, the performance requirements for gas regulating valves are gradually increasing, especially in terms of rapid response and precise regulation.

[0003] In existing technologies, such as the "Electric Gas Regulating Valve" with announcement number CN219062449U, a sealing ball is included. One end of the sealing ball is fixedly connected to an inlet pipe, and the upper surface of the sealing ball is fixedly connected to an outlet pipe. The other ends of both the inlet and outlet pipes are fitted with fixing components for securing the pipes. The other end of the sealing ball is fixedly connected to a transmission component. Although this technology achieves the effect of tightening the gas pipe connection and preventing gas leakage by inserting the outlet pipe into the outlet pipe and finally tightening the threaded ring to fix it into one piece, it is consistent with the traditional method in that existing gas regulating valves usually release pressure by directly venting gas outwards. Although this method can release excessive gas, it does not provide an effective feedback mechanism during the pressure release process, making it difficult for operators to detect the gas pressure release in time. Especially when the gas pressure rises rapidly, the regulating valve cannot remind operators to intervene through a significant alarm signal or indication, often leading to the pressure release being ignored and increasing safety risks. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a fast-response gas regulating valve to solve the problem that existing gas regulating valves lack effective pressure relief reminders.

[0005] Based on the above objectives, this utility model provides a fast-response gas regulating valve, including a regulating box. One side of the regulating box is connected to an inlet pipe, and the other side is connected to an outlet pipe. A connecting cylinder is connected to the top of the regulating box, and a gas collecting cylinder is connected to the top of the connecting cylinder. A pressure relief assembly for depressurizing the gas inside the regulating box is provided inside the connecting cylinder. The pressure relief assembly includes a float plate slidably connected inside the connecting cylinder and a positioning plate installed inside the bottom of the gas collecting cylinder. The positioning plate is located on top of the float plate. A guide rod is fixedly connected to the top of the float plate. A positioning column is fixedly connected to the top of the gas collecting cylinder. An regulating column is threadedly connected inside the positioning column. The top of the guide rod penetrates the interior of the regulating column. A first spring is fixedly connected to the top of the float plate. The first spring is sleeved outside the bottom of the guide rod, and the top of the first spring is fixedly connected to the bottom of the regulating column. An alarm assembly is installed on one side of the gas collecting cylinder, which is used to respond and issue an alarm when pressure is released.

[0006] Preferably, the bottom of the gas collecting cylinder is inverted conical, and multiple connecting blocks are fixedly connected in a ring inside the bottom of the gas collecting cylinder. The ends of the multiple connecting blocks away from the gas collecting cylinder are fixedly connected to the outside of the positioning plate. The positioning plate is located at the top of the connecting cylinder, and the diameter of the positioning plate is adapted to the diameter of the internal space of the connecting cylinder.

[0007] Preferably, the diameter of the air flotation plate is adapted to the diameter of the internal space of the connecting cylinder, the top of the guide rod is slidably engaged with a fixing frame, the end of the fixing frame away from the guide rod is fixedly connected to one side of the positioning column, and when the bottom of the adjusting column moves to the top of the air collecting cylinder, the air flotation plate is located at the lowest end of the connecting cylinder.

[0008] Preferably, a conical block is fixedly connected to the bottom of the regulating box, a connecting plate is fixedly connected to the bottom of the air flotation plate, a baffle is fixedly connected to the end of the connecting plate away from the air flotation plate, the baffle is located on one side of the air outlet pipe input end, and the diameter of the baffle is larger than the diameter of the air outlet pipe input end. When the air flotation plate is located at the lowest end of the connecting cylinder, the baffle corresponds to the air outlet pipe, and the top of the regulating box is conical in shape.

[0009] Preferably, a toothed ring is fixedly connected to the outside of the top of the adjusting column, and a protective cover is installed on the top of the gas collecting cylinder.

[0010] Preferably, a U-shaped cover is fixedly connected to the top of the positioning plate, the other end of the U-shaped cover is fixedly connected to the inner wall of the gas collecting cylinder, and an overflow pipe is connected to the top of the U-shaped cover.

[0011] Preferably, a shrink cylinder is fixedly connected to the top of the air flotation plate, and a leak-proof cylinder is fixedly connected inside the positioning plate. The top of the leak-proof cylinder is fixedly connected to the top of the inside of the air collecting cylinder. The insides of the shrink cylinder and the leak-proof cylinder are respectively sleeved outside the first spring, and the top of the shrink cylinder is slidably engaged with the inside of the bottom end of the leak-proof cylinder.

[0012] Preferably, the alarm assembly includes a first protective box installed on one side of the gas collection cylinder, a rotating shaft rotatably connected to the center of the first protective box, a rotating paddle installed on the outside of the rotating shaft, the output end of the overflow pipe passing through the side wall of the gas collection cylinder and the bottom of the first protective box corresponding to the bottom of the rotating paddle side, and an exhaust pipe connected to one side of the top of the first protective box.

[0013] Preferably, a second protective box is fixedly connected to one side of the first protective box, and a connecting shaft is fixedly connected to one end of the rotating shaft through one side of the second protective box. Multiple second springs are fixedly connected in a ring at equal intervals on the outside of the connecting shaft. A striking hammer is fixedly connected to the end of the second spring away from the connecting shaft. Multiple sound covers are fixedly connected in a ring at equal intervals on the inner wall of the second protective box. The sound covers correspond to the striking hammers. Both the second and first protective boxes are made of transparent plastic. Multiple holes are opened on one side of the second protective box.

[0014] The beneficial effects of this utility model are:

[0015] 1. Through the design of the pressure relief component and the alarm component, the two work together to achieve rapid pressure release and real-time alarm feedback during the pressure relief process, ensuring the smoothness and timeliness of gas pressure relief, and also ensuring that operators can receive immediate warnings when the pressure is abnormal, preventing equipment failure or other safety issues.

[0016] By precisely controlling the gas pressure relief component, the pressure accumulation inside the regulating valve can be effectively reduced, thus avoiding the adverse effects of excessive internal gas pressure. The component adopts a design combining an air float plate and a positioning plate. When the gas pressure rises abnormally, the air float plate rises to one side of the positioning plate. At this time, the gas flows into the interior of the U-shaped cover and is discharged from the interior of the overflow pipe, thereby adjusting the gas flow path and releasing excess gas in time, ensuring the stability of the device under high load.

[0017] During the depressurization process, the alarm components can immediately emit sound and visual signals to alert the operators to abnormal gas pressure, ensuring that the staff can be aware of the depressurization situation and take necessary countermeasures as soon as possible. When depressurizing, the rotating paddle will be blown to rotate, which will drive the hammer to strike the sound cover to produce a sound, thereby achieving the effect of visual and auditory alert. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Side view sectional structural schematic diagram;

[0021] Figure 3 This is a side view sectional structural diagram of the protective cover and gas collecting cylinder of this utility model;

[0022] Figure 4 This is a schematic diagram of the alarm component structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the gas collecting cylinder of this utility model.

[0024] The diagram is marked as follows:

[0025] 1. Adjustment box; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting cylinder; 5. Air collection cylinder; 6. Protective cover; 7. Air float plate; 8. Shrink cylinder; 9. Connecting block; 10. U-shaped cover; 11. First spring; 12. Leak-proof cylinder; 13. Positioning column; 14. Adjusting column; 15. Guide rod; 16. First protective box; 17. Second protective box; 18. Rotating shaft; 19. Rotating paddle; 20. Baffle; 21. Connecting shaft; 22. Second spring; 23. Striking hammer; 24. Noise cover; 25. Overflow pipe; 26. Exhaust pipe; 27. Conical block; 28. Linking plate; 29. ​​Fixing frame; 30. Positioning plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Such as this utility model Figures 1 to 5 The diagram shows a fast-response gas regulating valve, including a regulating box 1. One side of the regulating box 1 is connected to an inlet pipe 2, and the other side is connected to an outlet pipe 3. A connecting cylinder 4 is connected to the top of the regulating box 1, and a gas collecting cylinder 5 is connected to the top of the connecting cylinder 4. The connecting cylinder 4 is equipped with a pressure relief assembly for depressurizing the gas inside the regulating box 1. The pressure relief assembly includes a float plate 7 slidably connected inside the connecting cylinder 4 and a positioning plate 30 installed inside the bottom of the gas collecting cylinder 5. The positioning plate 30 is located at the bottom of the float plate 7. At the top, a guide rod 15 is fixedly connected to the top of the air flotation plate 7, a positioning column 13 is fixedly connected to the top of the air collecting cylinder 5, an adjusting column 14 is threadedly connected to the inside of the positioning column 13, the top of the guide rod 15 passes through the inside of the adjusting column 14, a first spring 11 is fixedly connected to the top of the air flotation plate 7, the first spring 11 is sleeved on the outside of the bottom of the guide rod 15, and the top of the first spring 11 is fixedly connected to the bottom of the adjusting column 14. An alarm component is installed on one side of the air collecting cylinder 5, and the alarm component is used to respond and issue an alarm when the pressure is released.

[0029] The pressure relief and alarm components work together to achieve rapid pressure release and real-time alarm feedback during the pressure relief process, ensuring smooth and timely gas pressure relief. This also ensures that operators receive immediate warnings when pressure is abnormal, preventing equipment failure or other safety issues.

[0030] like Figures 1 to 3As shown, the bottom of the air collecting cylinder 5 is inverted cone shape. Multiple connecting blocks 9 are fixedly connected in a ring inside the bottom of the air collecting cylinder 5. The ends of the multiple connecting blocks 9 away from the air collecting cylinder 5 are fixedly connected to the outside of the positioning plate 30. The positioning plate 30 is located at the top of the connecting cylinder 4. The diameter of the positioning plate 30 is adapted to the diameter of the internal space of the connecting cylinder 4. The diameter of the air flotation plate 7 is adapted to the diameter of the internal space of the connecting cylinder 4. The top of the guide rod 15 is slidably engaged with the fixing frame 29. The end of the fixing frame 29 away from the guide rod 15 is fixedly connected to one side of the positioning column 13. When the bottom of the adjusting column 14 moves to the top of the air collecting cylinder 5, the air flotation plate 7 is located at the lowest end of the connecting cylinder 4.

[0031] By precisely controlling the gas pressure relief mechanism, the pressure accumulation within the regulating valve can be effectively reduced, thus avoiding the adverse effects of excessive internal pressure. This mechanism combines an air-float plate 7 with a positioning plate 30. When the gas pressure rises abnormally, the air-float plate 7 rises to one side of the positioning plate 30. At this time, the gas flows into the U-shaped cover 10 and then exits through the overflow pipe 25, adjusting the gas flow path and releasing excess gas in a timely manner, ensuring the stability of the device under high loads. In use, first rotate the adjusting column 14, causing the first spring 11 to move the air-float plate 7 upwards or downwards, thereby adjusting the height of the air-float plate 7 and thus regulating its float. The function of the dynamic range adjustment is as follows: when gas enters the interior of the regulating box 1 through the air inlet pipe 2, it will push the air float 7 to move upward. At this time, the connecting plate 28 will drive the baffle 20 to move upward, thereby causing the input end of the air outlet pipe 3 to be opened. At the same time, the higher the air float 7 is adjusted upward, the higher the floating height of the air float 7 is, and the larger the opening of the input end of the air outlet pipe 3 is, and the more gas is output. Later, during operation, when the gas pressure suddenly increases, the top of the air float 7 will contact the bottom of the positioning plate 30. At this time, the gas will flow from the gap between the gas collecting cylinder 5 and the positioning plate 30 into the interior of the U-shaped cover 10, thereby causing the excess gas to be output from the interior of the overflow pipe 25, thus achieving the function of depressurization.

[0032] like Figures 1 to 3 As shown, a conical block 27 is fixedly connected to the bottom of the regulating box 1, and a connecting plate 28 is fixedly connected to the bottom of the air flotation plate 7. A baffle 20 is fixedly connected to the end of the connecting plate 28 away from the air flotation plate 7. The baffle 20 is located on one side of the input end of the air outlet pipe 3, and the diameter of the baffle 20 is larger than the diameter of the input end of the air outlet pipe 3. When the air flotation plate 7 is located at the lowest end of the connecting cylinder 4, the baffle 20 corresponds to the air outlet pipe 3. The top of the regulating box 1 is conical in shape.

[0033] The cone-shaped block 27 causes the gas entering the regulating box 1 from the air inlet pipe 2 to rise upward, thereby moving the air float 7. At the same time, the baffle 20 adjusts the size of the opening at the inlet end of the air outlet pipe 3, which is beneficial to the use of the regulating valve.

[0034] like Figures 1 to 3 As shown, a toothed ring is fixedly connected to the top of the adjusting column 14, a protective cover 6 is installed on the top of the air collecting cylinder 5, a U-shaped cover 10 is fixedly connected to the top of the positioning plate 30, the other end of the U-shaped cover 10 is fixedly connected to the inner wall of the air collecting cylinder 5, and an overflow pipe 25 is connected to the top of the U-shaped cover 10.

[0035] The toothed ring facilitates the rotation of the adjusting column 14, while the protective cover 6 protects the top of the adjusting column 14, preventing accidental contact during normal use. The U-shaped cover 10 collects depressurized gas.

[0036] like Figure 2 , Figure 3 and Figure 5 As shown, a shrink cylinder 8 is fixedly connected to the top of the air flotation plate 7, and a leak-proof cylinder 12 is fixedly connected inside the positioning plate 30. The top of the leak-proof cylinder 12 is fixedly connected to the top of the inside of the air collecting cylinder 5. The insides of the shrink cylinder 8 and the leak-proof cylinder 12 are respectively sleeved on the outside of the first spring 11. The top of the shrink cylinder 8 is slidably engaged with the inside of the bottom end of the leak-proof cylinder 12.

[0037] By setting the shrink cylinder 8 and the leak-proof cylinder 12, the problem of the depressurized gas leaking out from the first spring 11 can be avoided, which is beneficial to the subsequent guidance of the depressurized gas. At the same time, by setting the top of the shrink cylinder 8 and the bottom of the leak-proof cylinder 12 to slide and engage internally, the shrink cylinder 8 can be moved along with the air flotation plate 7, which facilitates the use of the air flotation plate 7.

[0038] like Figure 1 , Figure 3 and Figure 4 As shown, the alarm assembly includes a first protective box 16 installed on one side of the air collection cylinder 5. A rotating shaft 18 is rotatably connected to the center of the first protective box 16. A rotating paddle 19 is installed on the outside of the rotating shaft 18. The output end of the overflow pipe 25 passes through the side wall of the air collection cylinder 5 and the bottom of the first protective box 16, which corresponds to the bottom of one side of the rotating paddle 19. An exhaust pipe 26 is connected to one side of the top of the first protective box 16.

[0039] During the depressurization process, the alarm components can immediately emit sound and visual signals to alert operators to abnormal gas pressure, ensuring that staff are aware of the depressurization situation and can take necessary countermeasures. During depressurization, the rotating paddle 19 will rotate, simultaneously causing the hammer 23 to strike the sound cover 24, thus achieving a visual and auditory alert. When the depressurized gas is discharged through the overflow pipe 25, the excess gas will be discharged from the inside of the exhaust pipe 26 when the rotating paddle 19 is rotated, thereby releasing the gas pressure. It should also be noted that the output end of the exhaust pipe 26 can be connected to an open space through a hose, which is beneficial for gas discharge and avoids gas accumulation in a confined space, which could lead to safety accidents.

[0040] like Figure 1 , Figure 3 and Figure 4 As shown, a second protective box 17 is fixedly connected to one side of the first protective box 16. One end of the rotating shaft 18 passes through one side of the second protective box 17 and is fixedly connected to a connecting shaft 21. Multiple second springs 22 are fixedly connected in an annular shape at equal intervals on the outside of the connecting shaft 21. A hammer 23 is fixedly connected to the end of the second spring 22 away from the connecting shaft 21. Multiple sound covers 24 are fixedly connected in an annular shape at equal intervals on the inner wall of the second protective box 17. The sound covers 24 correspond to the hammer 23. Both the second protective box 17 and the first protective box 16 are made of transparent plastic. Multiple holes are opened on one side of the second protective box 17.

[0041] With the sound-cab 24 and the striking hammer 23, when the rotating paddle 19 rotates, the connecting shaft 21 will rotate the striking hammer 23 via the second spring 22, thereby causing the striking hammer 23 to strike the sound-cab 24 and make a sound, reminding the staff to deal with it in time. At the same time, by setting the second spring 22 to be a spring, the striking hammer 23 can be made to pass through one side of the sound-cab 24, so as not to affect the rotation of the striking hammer 23. In addition, by setting the first protective box 16 and the second protective box 17 to be transparent plastic, it is convenient for the staff to observe.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0043] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick-response gas regulating valve characterized by, The system includes a regulating box (1), one side of which is connected to an air inlet pipe (2), and the other side of which is connected to an air outlet pipe (3). A connecting cylinder (4) is connected to the top of the regulating box (1), and a gas collecting cylinder (5) is connected to the top of the connecting cylinder (4). The connecting cylinder (4) is equipped with a pressure relief assembly for depressurizing the gas inside the regulating box (1). The pressure relief assembly includes a float plate (7) slidably connected inside the connecting cylinder (4) and a positioning plate (30) installed inside the bottom of the gas collecting cylinder (5). 0) Located at the top of the air flotation plate (7), the top of the air flotation plate (7) is fixedly connected to a guide rod (15), the top of the air collecting cylinder (5) is fixedly connected to a positioning column (13), the internal thread of the positioning column (13) is connected to an adjusting column (14), the top of the guide rod (15) passes through the interior of the adjusting column (14), the top of the air flotation plate (7) is fixedly connected to a first spring (11), the first spring (11) is sleeved on the outside of the bottom of the guide rod (15), and the top of the first spring (11) is fixedly connected to the bottom of the adjusting column (14); An alarm component is installed on one side of the gas collection cylinder (5), which is used to issue an alarm in response to pressure relief.

2. The fast-response gas regulating valve according to claim 1, characterized in that, The bottom of the gas collecting cylinder (5) is inverted cone shape. Multiple connecting blocks (9) are fixedly connected in a ring inside the bottom of the gas collecting cylinder (5). The ends of the multiple connecting blocks (9) away from the gas collecting cylinder (5) are fixedly connected to the outside of the positioning plate (30). The positioning plate (30) is located at the top of the connecting cylinder (4). The diameter of the positioning plate (30) is adapted to the diameter of the internal space of the connecting cylinder (4).

3. A fast-response gas regulating valve according to claim 2, characterized in that, The diameter of the air flotation plate (7) is adapted to the diameter of the internal space of the connecting cylinder (4). The top of the guide rod (15) is slidably engaged with a fixing frame (29). The end of the fixing frame (29) away from the guide rod (15) is fixedly connected to one side of the positioning column (13). When the bottom of the adjusting column (14) moves to the top of the air collecting cylinder (5), the air flotation plate (7) is located at the lowest end of the connecting cylinder (4).

4. A fast-response gas regulating valve according to claim 3, characterized in that, A conical block (27) is fixedly connected to the bottom of the regulating box (1), and a connecting plate (28) is fixedly connected to the bottom of the air flotation plate (7). A baffle (20) is fixedly connected to the end of the connecting plate (28) away from the air flotation plate (7). The baffle (20) is located on one side of the input end of the air outlet pipe (3), and the diameter of the baffle (20) is larger than the diameter of the input end of the air outlet pipe (3). When the air flotation plate (7) is located at the lowest end of the connecting cylinder (4), the baffle (20) corresponds to the air outlet pipe (3). The top of the regulating box (1) is conical.

5. The quick-responding gas regulating valve according to claim 1, wherein A toothed ring is fixedly connected to the top of the adjusting column (14), and a protective cover (6) is installed on the top of the gas collecting cylinder (5).

6. A quick-response gas regulating valve according to claim 2, wherein The top of the positioning plate (30) is fixedly connected to a U-shaped cover (10), the other end of the U-shaped cover (10) is fixedly connected to the inner wall of the gas collecting cylinder (5), and the top of the U-shaped cover (10) is connected to an overflow pipe (25).

7. A quick-response gas regulating valve according to claim 6, wherein The top of the air flotation plate (7) is fixedly connected to a shrink cylinder (8), and the inside of the positioning plate (30) is fixedly connected to a leak-proof cylinder (12). The top of the leak-proof cylinder (12) is fixedly connected to the top of the inside of the air collecting cylinder (5). The inside of the shrink cylinder (8) and the leak-proof cylinder (12) are respectively sleeved on the outside of the first spring (11). The top of the shrink cylinder (8) is slidably engaged with the inside of the bottom of the leak-proof cylinder (12).

8. A fast-response gas regulating valve according to claim 6, characterized in that, The alarm assembly includes a first protective box (16) installed on one side of the gas collection cylinder (5). A rotating shaft (18) is rotatably connected to the center of the first protective box (16). A rotating paddle (19) is installed on the outside of the rotating shaft (18). The output end of the overflow pipe (25) passes through the side wall of the gas collection cylinder (5) and the bottom of the first protective box (16), corresponding to the bottom of the rotating paddle (19). An exhaust pipe (26) is connected to one side of the top of the first protective box (16).

9. A fast-response gas regulating valve according to claim 8, characterized in that, A second protective box (17) is fixedly connected to one side of the first protective box (16). One end of the rotating shaft (18) passes through one side of the second protective box (17) and is fixedly connected to a connecting shaft (21). Multiple second springs (22) are fixedly connected in a ring at equal intervals on the outside of the connecting shaft (21). A hammer (23) is fixedly connected to the end of the second spring (22) away from the connecting shaft (21). Multiple sound covers (24) are fixedly connected in a ring at equal intervals on the inner wall of the second protective box (17). The sound covers (24) correspond to the hammers (23). The second protective box (17) and the first protective box (16) are both made of transparent plastic. Multiple holes are opened on one side of the second protective box (17).

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