Noise eliminating device for high-pressure-drop emptying gas
By installing a dual silencing mechanism consisting of a cover and a sound-absorbing layer inside the exhaust pipe, the problem of high exhaust noise from carbon dioxide tank trucks is solved, ensuring that the silencing effect is not affected by the blockage of powdered dry ice, and effectively reducing gas noise.
Patent Information
- Application Number
- CN202423321440.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing technologies produce significant noise during the exhaust process of carbon dioxide tanker trucks, especially as liquid carbon dioxide turns into powdered dry ice that clogs the exhaust port, resulting in poor noise reduction.
Design a noise reduction device for high-pressure gas discharge, comprising a vertically installed discharge pipe and a cover. The cover has exhaust holes on its outer periphery and sound-absorbing material on its inner wall. The cover is automatically raised and lowered by guide columns and limit caps. Combined with a dual sound-absorbing mechanism, the gas noise reduction effect is ensured.
It effectively reduces gas noise, prevents exhaust port blockage, ensures soundproofing, avoids collision noise, prevents gas and liquid leakage, and protects the inside of the device from external objects and rainwater.
Smart Images
Figure CN223499080U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of noise treatment equipment, and in particular relates to a noise elimination device for high-voltage degassing air. Background Technology
[0002] With the increasing market demand for liquid carbon dioxide as a food additive and the rising requirements for product quality, manufacturers of liquid carbon dioxide for food additives need to strictly control quality during the production and filling processes. In practical applications, liquid carbon dioxide for food additives requires tanker transportation. Before loading onto each vehicle, the remaining product inside must be tested and analyzed; only those that pass the quality test can be filled. If the quality is substandard, the tanker needs to be replaced. During the replacement process, the carbon dioxide inside the tanker needs to be released. Due to the 2.0 MPa pressure difference between the tanker and the atmosphere, the gas and liquid flow rates during the release process are too fast, easily generating significant noise, which does not meet operational requirements. Summary of the Invention
[0003] The purpose of this application is to provide a noise reduction device for high-pressure exhaust gas, so as to solve the technical problem of high noise from carbon dioxide tanker exhaust gas in production activities.
[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a noise cancellation device for high-voltage degassing gas, comprising:
[0005] The discharge pipe is installed vertically, with the upper end of the pipe being the discharge outlet and the lower end having a sealing plate. The inner wall of the discharge pipe is covered with a sound-absorbing layer composed of sound-absorbing material.
[0006] A cover is disposed inside the discharge pipe. Exhaust holes are distributed around the outer periphery of the cover, and an air outlet is provided at the bottom of the cover. The sealing plate is provided with a guide post, the cover is disposed on the guide post, and a limiting cap is provided at the top of the guide post. The limiting cap is used to limit the upward stroke of the cover.
[0007] A pipe for connecting to the carrier of the exhaust gas, the pipe passing through the sealing plate into the exhaust pipe and extending into the interior of the enclosure.
[0008] The beneficial effects of the noise reduction device for high-pressure gas discharge provided in this application are as follows: Compared with the prior art, the noise reduction device of this application has at least two layers of silencing mechanisms inside the discharge pipe. Specifically, a cover is provided inside the discharge pipe, and the exhaust holes on the outer periphery of the cover form the first layer of silencing mechanism. The exhaust holes reduce the pressure of the flowing gas, thereby reducing the frequency of the generated sound waves to a range imperceptible to the human ear, thus achieving the purpose of noise reduction. A sound-absorbing layer composed of sound-absorbing material is laid on the inner wall of the discharge pipe to form the second layer of silencing mechanism. In this way, the gas enters the cover from the pipe, undergoes primary noise reduction treatment through the exhaust holes on the cover, then enters the inner cavity of the discharge pipe, undergoes secondary noise reduction treatment through the sound-absorbing layer on the inner wall of the discharge pipe, and is then discharged from the upper end of the discharge pipe, effectively reducing gas noise.
[0009] In the noise cancellation device provided in this embodiment, a vertical guide post is provided on the sealing plate at the lower end of the exhaust pipe. The top of the guide post has a limiting cap, and a cover is mounted on the guide post. The bottom of the cover has an air outlet. When powdered dry ice and gaseous carbon dioxide enter the cover from the pipe, the powdered dry ice blocks part of the exhaust holes on the cover, causing the pressure inside the cover to gradually increase and lift the cover. The cover rises along the guide post until it reaches the limiting cap, simultaneously opening the bottom air outlet. The gaseous carbon dioxide inside the cover can be discharged from the bottom air outlet and enters the inner cavity of the exhaust pipe. After noise reduction treatment by the sound-absorbing layer on the inner wall of the exhaust pipe, it is discharged from the upper end of the exhaust pipe, ensuring the noise reduction effect of the exhaust gas. Therefore, the noise cancellation device in this embodiment has a movable cover, which effectively solves the problem of blocked exhaust holes on the cover leading to a poor noise reduction effect, thereby ensuring the noise reduction effect of the noise cancellation device.
[0010] The structure of the noise cancellation device is improved, and the noise cancellation device also includes a drain pipe for draining the water accumulated inside the discharge pipe. The drain pipe passes through the sealing plate into the discharge pipe so that the drain pipe is connected to the inside of the discharge pipe, and the water accumulated inside the discharge pipe is drained by the drain pipe.
[0011] In one embodiment, the sealing plate is provided with a pair of guide posts, which extend parallel to each other from the sealing plate toward the upper end of the discharge pipe. This pair of guide posts limits the range of motion of the shroud, ensuring that the shroud remains coaxially aligned with the discharge pipe during movement, thereby creating a space of equal width between the outer periphery of the shroud and the inner wall of the discharge pipe. This allows gas inside the shroud to be evenly discharged into the upper end of the discharge pipe after exiting through the discharge holes on the outer periphery of the shroud.
[0012] In one embodiment, the exhaust holes on the cover have the same diameter and are evenly distributed on the outer periphery of the cover. This distribution of exhaust holes across the entire outer periphery maximizes the use of the cover's outer area, evenly depressurizing the gas flowing through each exhaust hole, thereby ensuring noise reduction.
[0013] In one embodiment, the noise cancellation device further includes a buffer pad, which is laid on the end face of the sealing plate located inside the discharge pipe. The projection of the cover is located within the range of the buffer pad, so that the cover can abut against the buffer pad when it descends, thereby eliminating the sound generated by the collision.
[0014] In one embodiment, a sealing ring is provided on the pipe, which is used to seal the penetration between the pipe and the sealing plate, thereby preventing air or liquid leakage from easily occurring at the lower end of the discharge pipe and effectively improving the sealing effect.
[0015] The structure of the discharge pipe is improved by adding a filter screen that covers the upper opening of the discharge pipe. This filter screen effectively prevents foreign objects from entering the discharge pipe from the upper opening, thus preventing insects or debris from entering and affecting the normal emission of gas.
[0016] In one embodiment, the discharge pipe is further provided with a rain shelter, which includes a rain shield and a bracket for supporting the rain shield. The bracket is disposed at the upper end of the discharge pipe. The rain shield is mounted on the bracket, so that the upper end of the discharge pipe is within the coverage area of the rain shield. In this way, the rain shelter prevents rainwater from entering the discharge pipe from the upper end, thus avoiding affecting the noise reduction effect of the device.
[0017] An improvement is made to the structure of the support frame, which includes four support rods: two adjacent first support rods and two remaining second support rods. The length of the first support rods is greater than the length of the second support rods. This creates a structure of multiple support rods at varying heights on the support frame, effectively supporting the rain shelter and allowing the rain shelter to be tilted to drain rainwater to one side.
[0018] Another improvement to the support structure is made: the support includes four support rods, comprising two opposing first support rods and two opposing second support rods. The first support rods are connected to the rain shelter via a pivot, and the second support rods are telescopic rods, allowing the rain shelter to adjust its tilt angle on the support. This allows the rain shelter to rotate about the pivot, thereby adjusting its tilt angle and effectively diverting rainwater in a designated direction. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the internal structure of a noise reduction device based on related technologies;
[0021] Figure 2 This is a three-dimensional structural diagram of the noise cancellation device provided in the embodiments of this application;
[0022] Figure 3 This is a schematic diagram of the internal structure of the noise cancellation device provided in the embodiments of this application;
[0023] Figure 4 This is a structural schematic diagram of the raised state of the cover provided in an embodiment of this application;
[0024] Figure 5 A three-dimensional structural diagram of the cover and guide post provided in an embodiment of this application;
[0025] Figure 6 A partial enlargement of the internal structure of the discharge pipe provided in the embodiments of this application. Figure 1 ;
[0026] Figure 7 A partial enlargement of the internal structure of the discharge pipe provided in the embodiments of this application. Figure 2 ;
[0027] Figure 8 A schematic diagram of the top structure of the discharge pipe provided in an embodiment of this application;
[0028] Figure 9 This is a schematic diagram of a discharge pipe with a rain shelter on top, provided in an embodiment of this application.
[0029] The following are the labeling elements in the figure:
[0030] 1-Discharge pipe; 11-Fixing bracket; 12-Sealing plate; 121-Buffer pad; 13-Sound absorption layer; 14-Filter screen;
[0031] 2-Cover body; 21-Exhaust vent; 22-Air outlet; 23-Top cover;
[0032] 3-Pipe; 31-Sealing ring;
[0033] 4-Guide post; 41-Limit cap;
[0034] 5-Drain pipe;
[0035] 6-Rain shelter; 61-Rain shelter panel; 62-Frame; 621-First support rod; 622-Second support rod. Detailed Implementation
[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0040] In related technologies, there are silencing devices for high-voltage venting air gases, such as... Figure 1 As shown, the device includes at least an exhaust pipe 1 and a cover 2 disposed inside the exhaust pipe. A gas pipe 3 passes through the exhaust pipe 1 from the outside and extends into the cover 2. Since the noise generated by the gas emission is due to the excessively high flow rate during emission, an exhaust hole 21 is provided on the outer periphery of the cover 2 to slow down and reduce the pressure of the gas flowing through the exhaust hole 21, thereby reducing the frequency of the generated sound waves to a range imperceptible to the human ear. This achieves the purpose of eliminating sound and reducing noise, so that the noise from the gas emission meets the environmental and hygiene standards.
[0041] However, the aforementioned silencing devices have technical defects when applied to carbon dioxide emissions, resulting in poor silencing effects and rendering them unsuitable. This is because the design of these silencing devices does not take into account the special characteristics of carbon dioxide emissions, particularly the possibility that liquid carbon dioxide may contain powdered dry ice, which can cause some of the emission orifices in the silencing devices to become blocked. Specifically, during the emission process, liquid carbon dioxide, after being throttled and depressurized, drops from a high pressure to atmospheric pressure, and its temperature also decreases. Some of the liquid carbon dioxide solidifies into powdered dry ice, which can block some of the emission orifices, thus reducing the silencing effect.
[0042] Therefore, this application provides a novel noise reduction device for high-pressure exhaust gas, specifically designed for carbon dioxide emissions, which effectively solves the problem of high noise from carbon dioxide tanker exhaust gas during production activities. It will now be described in detail.
[0043] Please refer to the following: Figure 2 and Figure 3 The noise reduction device for high-pressure exhaust gas is mainly used to reduce the noise of exhaust gas from carbon dioxide tank trucks. The noise reduction device includes an exhaust pipe 1, a cover 2, and a pipe 3.
[0044] like Figure 2 As shown, the discharge pipe 1 is mounted on a fixed frame 11, allowing the discharge pipe 1 to be installed vertically. Preferably, the fixed frame 11 is integrally connected to the lower end of the discharge pipe 1 to ensure support and overall structural strength.
[0045] Please refer to the following: Figure 3 and Figure 4 The discharge pipe 1 can preferably be a DN350 pipe 3. The upper end of the discharge pipe 1 is the discharge port, and the lower end of the discharge pipe 1 has a sealing plate 12. This can be understood as the sealing plate 12 sealing the lower end of the discharge pipe 1. The inner wall of the discharge pipe 1 is covered with a sound-absorbing layer 13 composed of sound-absorbing material, such as sound-absorbing cotton, so that the inner wall of the discharge pipe 1 forms a sound-absorbing mechanism to achieve the effect of noise reduction.
[0046] The cover 2 can preferably be a DN200 pipe 3. The cover 2 is installed inside the discharge pipe 1. Exhaust holes 21 are distributed on the outer periphery of the cover 2, and the bottom of the cover 2 has an air outlet 22.
[0047] Pipe 3 is used to connect to the carrier of the exhaust gas (not shown in the figure). In this embodiment, the carrier of the exhaust gas is preferably a carbon dioxide tanker truck, and the loading arm exhaust manifold of the carbon dioxide tanker truck is connected to pipe 3 of this embodiment. Pipe 3 enters the interior of the exhaust pipe 1 from the sealing plate 12 at the bottom of the exhaust pipe 1 and extends into the interior of the cover 2. The exhaust gas first undergoes primary noise reduction inside the cover 2, passing through the exhaust port 21 on the cover 2, and then enters the inner cavity of the exhaust pipe 1; then, the sound-absorbing layer 13 on the inner wall of the exhaust pipe 1 performs secondary noise reduction on the gas flowing through the inner cavity of the exhaust pipe 1; finally, the gas is discharged from the upper end of the exhaust pipe 1. It can be seen that in this exhaust process, the gas undergoes two levels of noise reduction treatment, effectively reducing gas noise.
[0048] Please refer to the following: Figure 3 , Figure 4 and Figure 5 ( Figure 3 and Figure 4 The arrows in the diagram indicate the gas flow path. A guide post 4 is also provided on the sealing plate 12 at the bottom of the discharge pipe 1. The shroud 2 is mounted on the guide post 4, and a limiting cap 41 is provided at the top of the guide post 4, which restricts the upward stroke of the shroud 2. This can be understood as the shroud 2 having a top cover 23 with a perforation (not shown in the diagram) that fits onto the guide post 4. The limiting cap 41 at the top of the guide post 4 blocks the perforation in the top cover of the shroud 2, thus restricting the upward stroke of the shroud 2.
[0049] Therefore, as Figure 4 As shown, the cover 2 is a movable mechanism. When the exhaust port 21 on the outer periphery of the cover 2 is blocked, the gas pressure inside the cover 2 can lift the cover 2. The cover 2 rises along the guide post 4, so that the gas inside the cover 2 can be discharged from the exhaust port 22 at the bottom of the cover 2. The sound-absorbing layer 13 on the inner wall of the exhaust pipe 1 is used to further reduce the noise of the gas, effectively solving the problem that the exhaust port 21 on the cover 2 is easily blocked, resulting in poor noise reduction effect.
[0050] Compared with the prior art, the noise reduction device for high-pressure gas discharge provided in this application has at least two layers of silencing mechanisms inside the discharge pipe 1. Specifically, a cover 2 is provided inside the discharge pipe 1. The exhaust holes 21 on the outer periphery of the cover 2 form the first layer of silencing mechanism. The exhaust holes 21 depressurize the flowing gas, reducing the frequency of the generated sound waves to a range imperceptible to the human ear, thereby reducing noise. A sound-absorbing layer 13 composed of sound-absorbing material is laid on the inner wall of the discharge pipe 1 to form the second layer of silencing mechanism. In this way, the gas enters the cover 2 from the pipe 3, undergoes primary noise reduction treatment through the exhaust holes 21 on the cover 2, then enters the inner cavity of the discharge pipe 1, undergoes secondary noise reduction treatment through the sound-absorbing layer 13 on the inner wall of the discharge pipe 1, and is then discharged from the upper end of the discharge pipe 1, effectively reducing gas noise.
[0051] Compared to the noise reduction devices mentioned in the aforementioned related technologies, these technologies do not consider the characteristics of liquid carbon dioxide. When liquid carbon dioxide is emitted, some of it turns into powdered dry ice, and some turns into gas. When the powdered dry ice and gaseous carbon dioxide enter the device, the powdered dry ice easily clogs the discharge port 21 on the enclosure 2, resulting in a reduction in noise reduction effect.
[0052] In the noise reduction device provided in this embodiment, a vertical guide post 4 is provided on the sealing plate 12 at the lower end of the discharge pipe 1. The top of the guide post 4 has a limiting cap 41. The cover 2 is set on the guide post 4, and the bottom of the cover 2 has an air outlet 22. When powdered dry ice and gaseous carbon dioxide enter the cover 2 from the pipe 3, the powdered dry ice blocks part of the exhaust holes 21 on the cover 2, causing the pressure inside the cover 2 to gradually increase and lift the cover 2. The cover 2 rises along the guide post 4 until it reaches the limiting cap 41, and at the same time, the bottom air outlet 22 of the cover 2 opens. The gaseous carbon dioxide inside the cover 2 can be discharged from the air outlet 22 at the bottom of the cover 2 and enter the inner cavity of the discharge pipe 1. After being treated by the sound-absorbing layer 13 on the inner wall of the discharge pipe 1, it is discharged from the upper end of the discharge pipe 1, ensuring the noise reduction effect on the exhaust gas.
[0053] The dry ice powder has a very low temperature (approximately -78°C). Because the ambient temperature is higher than the dry ice powder's temperature, the dry ice gradually heats up and sublimates into gas. This means that the dry ice powder blocking the exhaust port 21 of the enclosure 2 will naturally dissipate, thus relieving the blockage. When the pressure inside the enclosure 2 decreases, the enclosure 2 will descend along the guide post 4 to reset and continue depressurizing the emitted gas. Therefore, the noise cancellation device of this embodiment, with its movable enclosure 2, effectively solves the problem of reduced noise reduction effect caused by blocked exhaust ports 21, thereby ensuring the noise reduction effect of the noise cancellation device of this application.
[0054] In practical applications, after the above-described process, the temperature of the discharge pipe 1 changes, and after the sublimation of gases, powdered dry ice, etc., condensate is easily generated and accumulates at the bottom of the discharge pipe 1.
[0055] Therefore, in one embodiment of this application, please refer to Figure 6 The noise elimination device in this application embodiment also includes a drain pipe 5. The drain pipe 5 passes through the sealing plate 12 at the lower end of the discharge pipe 1 and enters the interior of the discharge pipe 1 so that the drain pipe 5 communicates with the interior of the discharge pipe 1 and the water accumulated inside the discharge pipe 1 is discharged by the drain pipe 5.
[0056] Preferably, a sealing structure, such as a sealing ring, can be installed at the penetration point where the drain pipe 5 enters the discharge pipe 1 to prevent leakage of liquid or air, thereby improving the sealing effect.
[0057] Regarding the layout of the guide pillars 4 within the discharge pipe 1, please refer to one embodiment of this application. Figure 4 and Figure 5 The sealing plate 12 is provided with a pair of guide posts 4, which extend parallel to the upper end of the discharge pipe 1 from the sealing plate 12.
[0058] In this embodiment, as Figure 5 As shown, the pair of guide posts 4 on the sealing plate 12 have the same extension length, and the tops of the two guide posts 4 have connected limiting caps 41. Correspondingly, the top cover 23 of the cover body 2 can have the same number of perforations as the guide posts 4 (not shown in the figure) to pass through the guide posts 4 respectively, and be synchronously limited by the limiting caps 41 connected to the two guide posts 4.
[0059] In this way, the pair of guide posts 4 limit the range of motion of the cover 2, so that the cover 2 can remain coaxially aligned with the discharge pipe 1 during the movement, thereby forming a space of equal width between the outer periphery of the cover 2 and the inner wall of the discharge pipe 1. After the gas inside the cover 2 is discharged from the discharge hole on the outer periphery of the cover 2, it can be evenly discharged into the upper end of the discharge pipe 1.
[0060] Regarding the structure on the cover 2, please refer to one embodiment of this application. Figure 5 The exhaust holes 21 on the cover 2 are evenly distributed on the outer periphery of the cover 2.
[0061] In this embodiment, the exhaust holes 21 on the outer periphery of the cover 2 have the same diameter and are evenly distributed on the outer periphery of the cover 2. Adjacent exhaust holes 21 can be aligned or staggered.
[0062] In this way, the exhaust holes 21 are distributed on the outer periphery of the entire cover 2 to maximize the use of the outer periphery area of the cover 2 and uniformly reduce the pressure of the gas flowing through each exhaust hole 21, thereby ensuring the noise reduction effect.
[0063] In other embodiments (not shown in the figure), the distribution of the exhaust holes 21 on the outer periphery of the cover 2 can also be such that the distribution density is higher near the top of the cover 2 and lower further away from the top of the cover 2; or, the distribution density is higher near the top of the cover 2 and lower further away from the top of the cover 2. This can be configured according to the characteristics of the emitted gas, and is not specifically limited here.
[0064] In practical applications, since both the discharge pipe 1 and the cover 2 are made of metal, such as iron, when the cover 2 naturally descends and resets, it is easy to collide with the inner bottom surface of the sealing plate 12 at the lower end of the discharge pipe 1, resulting in a sound and noise.
[0065] Therefore, in order to eliminate the aforementioned collision noise, in one embodiment of this application, please refer to... Figure 7 The noise cancellation device also includes a buffer pad 121, which is laid on the end face of the sealing plate 12 located inside the discharge pipe 1. The downward projection of the cover 2 is located within the range of the buffer pad 121, so that the cover 2 can abut against the buffer pad 121 when it descends, thereby eliminating the noise generated by the collision.
[0066] In this embodiment, the buffer pad 121 can preferably be made of sound-absorbing cotton. On the one hand, the sound-absorbing cotton can play a sound-absorbing role, so that a sound-absorbing layer 13 is formed all around the inside of the discharge pipe 1, ensuring the sound absorption and noise reduction effect of the device. On the other hand, the sound-absorbing cotton is a soft material, which can play a cushioning role, which is conducive to the collision between the buffer cover 2 and the sealing plate 12 at the bottom of the discharge pipe 1, and eliminates the sound generated by the collision.
[0067] Regarding the connection structure between pipe 3 and discharge pipe 1, please refer to one embodiment of this application. Figure 7 The pipe 3 is also equipped with a sealing ring 31, which is set at the penetration point between the pipe 3 and the sealing plate 12, thereby preventing air leakage and liquid leakage from easily occurring at the lower end of the discharge pipe 1, and effectively improving the sealing effect.
[0068] In this embodiment, the sealing plate 12 has a through hole (not shown) so that the pipe 3 can pass through the through hole and extend into the interior of the discharge pipe 1. The sealing ring 31 is provided on the pipe 3 and seals the gap between the outer periphery of the pipe 3 and the through hole on the sealing plate 12, thereby improving the sealing effect.
[0069] Regarding the structure of the upper part of the discharge pipe 1, please refer to one embodiment of this application. Figure 8The discharge pipe 1 is also equipped with a filter screen 14, which covers the upper end of the discharge pipe 1.
[0070] In this way, the filter screen 14 blocks foreign objects from entering the interior of the discharge pipe 1 from the upper end of the discharge pipe 1, effectively preventing insects or debris from entering the discharge pipe 1 and avoiding affecting the normal discharge of gas.
[0071] For the structure of the upper part of the discharge pipe 1, please refer to another embodiment of this application. Figure 1 and Figure 9 The discharge pipe 1 is also equipped with a rain shelter 6, which includes a rain shelter 61 and a bracket 62 for supporting the rain shelter 61. The bracket 62 is located at the upper end of the discharge pipe 1. The rain shelter 61 is installed on the bracket 62, so that the upper end of the discharge pipe 1 is within the coverage area of the rain shelter 61.
[0072] In this way, the rain shelter 6 is used to block rainwater from entering the discharge pipe 1 from the upper end of the discharge pipe 1, so as to avoid affecting the noise reduction effect of the device.
[0073] The specific structure of the bracket 62 includes, but is not limited to, the following forms:
[0074] In one embodiment of this application, please refer to Figure 9 The bracket 62 includes four support rods, which can preferably be made of four stainless steel flat irons.
[0075] The four support rods include two opposing first support rods 621 and two opposing second support rods 622. The first support rods 621 are connected to the rain shield 61 via a pivot. The second support rods 622 are telescopic rods connecting the rain shield 61 and the discharge pipe 1, allowing the rain shield 61 to adjust its tilt angle on the bracket 62, thereby draining the blocked rainwater in a designated direction.
[0076] In this embodiment, two opposing first support rods 621 are connected to the central axis of the rain shelter 61 via a pivot, and two other opposing second support rods 622 are connected to both sides of the rain shelter 61. Since the second support rods 622 are telescopic rods, the rain shelter 61 can be rotated around the pivot by adjusting the telescopic length of the second support rods 622, thereby adjusting the tilt angle of the rain shelter 61 and effectively draining the blocked rainwater in a designated direction.
[0077] In another embodiment of this application (not shown), the bracket 62 includes four support rods, which may preferably be made of four stainless steel flat irons.
[0078] The four support rods include two adjacent first support rods 621 and the remaining two second support rods 622, wherein the length of the first support rod 621 is greater than the length of the second support rod 622.
[0079] In this way, the bracket 62 forms a structure of multiple support rods with varying heights to effectively support the rain shield 61, and the rain shield 61 is set at an angle so that rainwater is drained to one side.
[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A noise cancellation device for high-voltage venting gas, characterized in that, include: The discharge pipe is installed vertically, with the upper end of the pipe being the discharge outlet and the lower end having a sealing plate. The inner wall of the discharge pipe is covered with a sound-absorbing layer composed of sound-absorbing material. A cover is disposed inside the discharge pipe. Exhaust holes are distributed around the outer periphery of the cover, and an air outlet is provided at the bottom of the cover. The sealing plate is provided with a guide post, the cover is disposed on the guide post, and a limiting cap is provided at the top of the guide post. The limiting cap is used to limit the upward stroke of the cover. A pipe for connecting to the carrier of the exhaust gas, the pipe passing through the sealing plate into the exhaust pipe and extending into the interior of the enclosure.
2. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The noise cancellation device also includes a drain pipe for draining water accumulated inside the discharge pipe, the drain pipe extending from the sealing plate into the discharge pipe.
3. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The sealing plate is provided with a pair of guide posts, which extend parallel to each other from the sealing plate toward the upper end of the discharge pipe.
4. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The exhaust holes on the cover have the same diameter and are evenly distributed on the outer periphery of the cover.
5. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The noise cancellation device also includes a buffer pad, which is laid on the end face of the sealing plate located inside the discharge pipe. The projection of the cover is located within the range of the buffer pad, so that the cover can abut against the buffer pad when it descends.
6. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The pipe is equipped with a sealing ring, which is used to seal the penetration point between the pipe and the sealing plate.
7. The noise cancellation device for high-voltage air discharge gas according to claim 1, characterized in that: The discharge pipe is also equipped with a filter screen, which covers the upper end of the discharge pipe.
8. The noise cancellation device for high-voltage venting gas according to any one of claims 1 to 7, characterized in that: The discharge pipe is also equipped with a rain shelter, which includes a rain shelter panel and a bracket for supporting the rain shelter panel. The bracket is located at the upper end of the discharge pipe. The rain shelter panel is installed on the bracket so that the upper end of the discharge pipe is located within the coverage area of the rain shelter panel.
9. The noise cancellation device for high-voltage venting gas according to claim 8, characterized in that: The bracket includes four support rods, which include two adjacent first support rods and two remaining second support rods. The length of the first support rods is greater than the length of the second support rods.
10. The noise cancellation device for high-voltage venting gas according to claim 8, characterized in that: The bracket includes four support rods, including two opposing first support rods and two opposing second support rods. The first support rods are connected to the rain shield via a pivot, and the second support rods are telescopic rods, allowing the rain shield to be tilted at an adjustable angle on the bracket.