Air valve exhaust noise reduction device, air brake system and engineering machinery

Abstract

The utility model discloses a kind of air valve exhaust noise reduction device, air brake system and engineering machinery, wherein, air valve exhaust noise reduction device includes air valve body, muffler and auxiliary noise reduction component, air valve body has the exhaust port for compressed air to discharge, muffler is used to carry out muffling and noise reduction to exhaust port, auxiliary noise reduction component includes the first extension pipe and pressure limiting valve of butt joint setting, first extension pipe is connected with one of exhaust port and muffler, pressure limiting valve is connected with another of exhaust port and muffler, first extension pipe is configured to reduce the speed of compressed air, pressure limiting valve is configured to reduce the pressure of compressed air, this multistage noise reduction processing mode, can effectively solve the problem that traditional single muffler is poor in noise reduction effect when facing high frequency or high pressure exhaust.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, specifically relating to a gas valve exhaust noise reduction device, a gas braking system, and engineering machinery. Background Technology

[0002] Air braking systems are braking devices that use gas as the working medium. They control the transition between braking and releasing states through the flow of compressed air and are widely used in heavy vehicles. Because air braking systems often generate high noise levels during the exhaust phase, which can pose a potential threat to the hearing health of operators, interfere with normal communication at the construction site, and even cause noise pollution in the surrounding environment, noise reduction devices are required for the air valves of air braking systems.

[0003] The current conventional noise reduction method is to directly connect a muffler to the exhaust port of the valve for noise reduction. This method is not very effective and cannot effectively reduce the exhaust noise of the valve. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies, this utility model provides a valve exhaust noise reduction device, a pneumatic braking system and engineering machinery, aiming to solve the technical problem of poor noise reduction effect of existing noise reduction devices.

[0005] To achieve the above objectives, the first aspect of this utility model provides a valve exhaust noise reduction device, wherein the valve exhaust noise reduction device includes a valve body, a silencer, and an auxiliary noise reduction component. The valve body has an exhaust port for compressed air to be discharged. The silencer is used to reduce noise at the exhaust port. The auxiliary noise reduction component is disposed between the exhaust port and the silencer. The auxiliary noise reduction component includes a first extension pipe and a pressure limiting valve connected together. The first extension pipe is connected to one of the exhaust port and the silencer, and the pressure limiting valve is connected to the other of the exhaust port and the silencer. The first extension pipe is configured to reduce the speed of the compressed air, and the pressure limiting valve is configured to reduce the pressure of the compressed air.

[0006] In this embodiment of the invention, the end of the first extension tube away from the pressure relief valve is connected to the exhaust port, the end of the pressure relief valve away from the first extension tube is connected to the muffler, and the first extension tube is bent.

[0007] In this embodiment of the utility model, the auxiliary noise reduction component further includes a first transition joint, which is connected to the pressure limiting exhaust port of the pressure limiting valve and is provided with at least two diversion interfaces. Each diversion interface is connected to a first extension pipe, and each first extension pipe is connected to a muffler.

[0008] In this embodiment of the invention, at least two diversion ports extend out at intervals along the radial direction of the first transition joint, and the first extension tubes corresponding to the at least two diversion ports are all bent toward the side away from the pressure relief valve.

[0009] In this embodiment of the invention, the auxiliary noise reduction component further includes a second extension tube, which connects the exhaust port and the pressure-limiting air inlet of the pressure-limiting valve.

[0010] In this embodiment of the utility model, a second transition joint is provided at the end of the first extension tube, a first slot is formed on the outer peripheral wall of the second transition joint, and the muffler is sleeved on the second transition joint and has a snap-fit ​​part embedded in the first slot.

[0011] In this embodiment of the utility model, the auxiliary noise reduction component further includes a noise reduction housing, which is set as the frame box on the rear side of the cab. The air valve and the auxiliary noise reduction component are both located on the outside of the noise reduction housing, and the muffler is located on the inside of the noise reduction housing.

[0012] In this embodiment of the utility model, a wiring bracket is also provided inside the noise reduction housing. At least two cable tie seats are provided on the wiring bracket. The at least two cable tie seats are arranged at intervals along the wiring bracket and are used to tie and fix each of the first extension tubes respectively.

[0013] To achieve the above objectives, a second aspect of this utility model provides an air braking system, which includes the aforementioned air valve exhaust noise reduction device.

[0014] To achieve the above objectives, the third aspect of this utility model provides an engineering machine, which includes the aforementioned air braking system.

[0015] Through the above technical solution, the air valve exhaust noise reduction device provided in this utility model embodiment has the following beneficial effects: When the air brake system uses the aforementioned air valve exhaust noise reduction device, the compressed air in the air brake system is discharged through the exhaust port of the air valve body. Compared to the solution of directly setting a muffler at the exhaust port, the air valve exhaust noise reduction device of this utility model also has an auxiliary noise reduction component between the exhaust port and the muffler. This auxiliary noise reduction component is used to process the compressed air entering the muffler. The auxiliary noise reduction component includes a first extension pipe and a pressure limiting valve connected together. The first extension pipe extends the path length of the compressed air from the exhaust port to the muffler, thereby reducing the flow velocity of the compressed air. The pressure limiting valve is used to limit the air pressure of the compressed air entering the muffler. After the compressed air passes through the first extension pipe and the pressure limiting valve, its flow velocity and pressure are doubly regulated, and the airflow state when entering the muffler is more stable and gentle, thus further improving the overall noise reduction effect in conjunction with the muffler. This multi-stage noise reduction treatment method can effectively solve the problem of poor noise reduction effect of traditional single mufflers when facing high-frequency or high-pressure exhaust.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a structural schematic diagram of the air valve exhaust noise reduction device according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of the air valve exhaust noise reduction device according to another embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] The following description, with reference to the accompanying drawings, describes the present invention's air valve exhaust noise reduction device, air braking system, and engineering machinery.

[0021] like Figure 1 or Figure 2 As shown, this utility model provides a valve exhaust noise reduction device, wherein the valve exhaust noise reduction device includes: Air valve body 1, air valve body 1 has an exhaust port for compressed air to be discharged; Muffler 2 is used to reduce noise at the exhaust port; An auxiliary noise reduction component is located between the exhaust port and the muffler 2 and includes a first extension pipe 3 and a pressure relief valve 4 connected together. The first extension pipe 3 is connected to one of the exhaust port and the muffler 2, and the pressure relief valve 4 is connected to the other of the exhaust port and the muffler 2. The first extension pipe 3 is configured to reduce the speed of compressed air, and the pressure relief valve 4 is configured to reduce the pressure of compressed air.

[0022] When the air brake system uses the aforementioned air valve exhaust noise reduction device, the compressed air in the air brake system is discharged through the exhaust port of the air valve body 1. Compared to the solution of directly setting the muffler 2 at the exhaust port, the air valve exhaust noise reduction device of this utility model also sets an auxiliary noise reduction component between the exhaust port and the muffler 2 to process the compressed air entering the muffler 2. The auxiliary noise reduction component includes a first extension pipe 3 and a pressure limiting valve 4 connected together. The setting of the first extension pipe 3 extends the path length of the compressed air from the exhaust port to the muffler 2, thereby reducing the flow rate of the compressed air. The pressure limiting valve 4 is used to limit the air pressure of the compressed air entering the muffler 2. After the compressed air passes through the first extension pipe 3 and the pressure limiting valve 4, its flow rate and pressure are doubly regulated, and the airflow state when entering the muffler 2 is more stable and gentle, thereby further improving the overall noise reduction effect in conjunction with the muffler 2. This multi-stage noise reduction treatment method can effectively solve the problem of poor noise reduction effect of traditional single muffler 2 when facing high-frequency or high-pressure exhaust.

[0023] like Figure 1 As shown, in this embodiment of the invention, the end of the first extension pipe 3 furthest from the pressure limiting valve 4 is connected to the exhaust port, and the end of the pressure limiting valve 4 furthest from the first extension pipe 3 is connected to the muffler 2. The first extension pipe 3 is positioned before the pressure limiting valve 4, allowing the compressed air to be decelerated before being depressurized, thereby reducing additional noise during the pressure reduction process of the pressure limiting valve 4 caused by excessively fast airflow. Simultaneously, the decelerated airflow exhibits more stable flow and a more uniform pressure release process within the pressure limiting valve 4 during pressure regulation, contributing to improved working stability and accuracy of the pressure reduction effect of the pressure limiting valve 4, thus providing more favorable airflow conditions for the subsequent noise reduction process of the muffler 2.

[0024] Furthermore, the first extension pipe 3 is bent. On the one hand, when compressed air flows at the bend of the first extension pipe 3, local vortices are generated due to the change in path direction, further consuming the kinetic energy of the airflow and allowing the airflow velocity to be buffered twice before entering the pressure relief valve 4. On the other hand, by bending the first extension pipe 3, the arrangement direction of the pressure relief valve 4 can be changed, thereby effectively utilizing the space at the bottom of the construction machinery. Generally, the top surface of the valve body 1 is connected to the frame, and the exhaust port of the valve body 1 is set downward. After bending, the first extension pipe 3 can be set horizontally along the frame, thereby extending the length of the first extension pipe 3, increasing the flow path of the airflow in the pipe, and further reducing the airflow velocity.

[0025] Specifically, the first extension pipe 3 can be a rigid bend or a rubber hose. Using a rubber hose is more conducive to adapting to the layout requirements of the space under the construction machinery. During installation and maintenance, the routing can be flexibly adjusted according to the actual space, reducing assembly difficulty and improving installation efficiency.

[0026] like Figure 2 As shown in this embodiment of the invention, the auxiliary noise reduction component further includes a first transition joint 6. The first transition joint 6 is connected to the pressure-limiting exhaust port of the pressure-limiting valve 4 and is provided with at least two diversion interfaces 61. Each diversion interface 61 is connected to a first extension pipe 3, and each first extension pipe 3 is connected to a silencer 2. Through at least two first extension pipes 3, the airflow discharged from the pressure-limiting valve 4 can be diverted, dispersing the originally concentrated high-pressure airflow into two streams, reducing the pressure and velocity of a single airflow. After the airflow enters the corresponding first extension pipe 3, it is then subjected to noise reduction through its respective connected silencer 2. This diversion design can reduce the processing load of a single silencer 2 and avoid the noise reduction effect of the silencer 2 decreasing due to excessive airflow.

[0027] In this embodiment of the invention, at least two diversion ports 61 extend radially from the first transition joint 6, and the first extension pipes 3 corresponding to the at least two diversion ports are bent toward the side away from the pressure relief valve 4. This arrangement facilitates the rational planning of airflow paths within a limited installation space and avoids interference between pipes. The bending of the two second extension pipes 5 toward the same side allows for a more concentrated installation position of the silencer 2, facilitating subsequent maintenance and replacement. Simultaneously, the counter-extending diversion ports ensure that the gas flow rates entering each first extension pipe 3 are close or equal, thereby ensuring that each airflow receives balanced noise reduction conditions in the subsequent silencer 2, preventing overload of one silencer 2 due to flow rate differences and thus affecting the overall noise reduction effect.

[0028] Specifically, the auxiliary noise reduction component also includes a second extension pipe 5, which connects the exhaust port and the pressure-limiting air inlet of the pressure-limiting valve.

[0029] In this embodiment of the invention, a second transition joint 7 is provided at the end of the second extension pipe 5. A first groove is formed on the outer peripheral wall of the second transition joint 7. The silencer 2 is sleeved on the second transition joint 7 and has a snap-fit ​​part embedded in the first groove. This detachable design facilitates the quick installation and replacement of the silencer 2. When the silencer 2 ages or degrades due to long-term use, there is no need for complex disassembly of the entire pipeline structure. The silencer 2 can be replaced simply by removing it from the second transition joint 7, effectively reducing maintenance and time costs. At the same time, the mating structure of the first groove and the snap-fit ​​part ensures a tight connection between the silencer 2 and the second transition joint 7, preventing airflow leakage at the connection point and generating additional noise, further improving the noise reduction stability of the device.

[0030] In this embodiment of the invention, the auxiliary noise reduction component further includes a noise reduction housing. The noise reduction housing is located in the frame housing behind the cab. The air valve and the auxiliary noise reduction component are both located on the outside of the noise reduction housing, and the muffler 2 is located on the inside of the noise reduction housing. The noise reduction housing can physically isolate the muffler 2, using the housing structure to block some noise from propagating outward. Furthermore, for construction machinery such as cranes, the frame itself has a housing structure that can be used to house the crane's hydraulic lines, slewing mechanism, etc. Therefore, in this embodiment, the existing frame housing is used as the noise reduction housing, fully integrating vehicle structural resources and avoiding the occupation of excessive external space due to the additional noise reduction components.

[0031] Specifically, the noise-reducing housing has openings on its side walls to allow the first extension tube 3 to enter the inner side of the housing. Furthermore, sound-absorbing materials such as sound-absorbing cotton can be installed on the inner wall of the noise-reducing housing. The porous structure of the sound-absorbing cotton absorbs sound wave energy, further reducing the intensity of noise propagation.

[0032] In this embodiment of the invention, a wiring bracket is further provided inside the noise-reducing housing. At least two cable tie seats are provided on the wiring bracket, spaced apart along the bracket and used to secure each of the first extension tubes 3. By forming a stable support structure within the noise-reducing housing, the wiring bracket effectively limits the shaking or displacement of the first extension tubes 3 under airflow impact, thereby preventing additional noise caused by pipe vibration. The spaced cable tie seats ensure sufficient spacing between the bundled silencers 2, preventing additional noise generation due to mutual airflow interference between the silencers 2.

[0033] In this embodiment of the invention, the length of the first extension tube 3 is set to 0.5-1.5m. Setting the first extension tube 3 within this length range ensures sufficient space for initial airflow buffering after the gas exits the exhaust port, preventing excessive noise caused by airflow directly impacting subsequent components due to insufficient distance, while also preventing an increase in the overall size and installation difficulty of the device due to excessive length. Specifically, the preferred length of the first extension tube 3 is 1m.

[0034] Specifically, both the first extension tube 3 and the second extension tube 5 are rubber hoses, and transition joints are provided at the interfaces of the air valve and the pressure relief valve 4. The extension tubes are sleeved on the transition joints and fastened with clamps to prevent loosening and air leakage.

[0035] To achieve the above objectives, a second aspect of this utility model provides a pneumatic braking system, which includes the aforementioned air valve exhaust noise reduction device. Since the pneumatic braking system employs all the technical solutions of the above embodiments, it at least possesses the aforementioned beneficial effects.

[0036] To achieve the above objectives, a third aspect of this utility model provides an engineering machine that includes the aforementioned pneumatic braking system. Since the engineering machine employs all the technical solutions of the above embodiments, it possesses at least the aforementioned beneficial effects.

[0037] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve-driven exhaust noise reduction device, characterized in that, The air valve exhaust noise reduction device includes: The valve body (1) has an exhaust port for discharging compressed air; Muffler (2) is used to reduce noise at the exhaust port; An auxiliary noise reduction component is disposed between the exhaust port and the muffler (2). The auxiliary noise reduction component includes a first extension pipe (3) and a pressure limiting valve (4) connected together. The first extension pipe (3) is connected to one of the exhaust port and the muffler (2), and the pressure limiting valve (4) is connected to the other of the exhaust port and the muffler (2). The first extension pipe (3) is configured to reduce the speed of compressed air, and the pressure limiting valve (4) is configured to reduce the pressure of compressed air.

2. The air valve exhaust noise reduction device according to claim 1, characterized in that, The end of the first extension tube (3) away from the pressure relief valve (4) is connected to the exhaust port, the end of the pressure relief valve (4) away from the first extension tube (3) is connected to the muffler (2), and the first extension tube (3) is bent.

3. The air valve exhaust noise reduction device according to claim 1, characterized in that, The auxiliary noise reduction component also includes a first transition joint (6), which is connected to the pressure limiting exhaust port of the pressure limiting valve (4) and is provided with at least two diversion ports (61). Each diversion port (61) is connected to a first extension pipe (3), and each first extension pipe (3) is connected to the muffler (2).

4. The air valve exhaust noise reduction device according to claim 3, characterized in that, At least two of the diversion ports (61) extend out at intervals along the radial direction of the first transition joint (6), and the first extension tubes (3) corresponding to the at least two diversion ports (61) are all bent toward the side away from the pressure relief valve (4).

5. The air valve exhaust noise reduction device according to claim 3, characterized in that, The auxiliary noise reduction component also includes a second extension tube (5), which connects the exhaust port and the pressure limiting inlet of the pressure limiting valve (4).

6. The air valve exhaust noise reduction device according to claim 3, characterized in that, The end of the first extension tube (3) is provided with a second transition joint (7), and a first slot is formed on the outer peripheral wall of the second transition joint (7). The muffler (2) is sleeved on the second transition joint (7) and has a snap-fit ​​part embedded in the first slot.

7. The air valve exhaust noise reduction device according to any one of claims 1 to 6, characterized in that, The auxiliary noise reduction component also includes a noise reduction housing, which is set as the frame box on the rear side of the cab. The air valve and the auxiliary noise reduction component are both located on the outside of the noise reduction housing, and the muffler (2) is located on the inside of the noise reduction housing.

8. The air valve exhaust noise reduction device according to claim 7, characterized in that, The noise reduction housing is also provided with a wiring bracket, and the wiring bracket is provided with at least two cable tie seats. The at least two cable tie seats are arranged at intervals along the wiring bracket and are used to tie and fix each of the first extension tubes (3) respectively.

9. A pneumatic braking system, characterized in that, The air braking system includes an air valve exhaust noise reduction device according to any one of claims 1 to 8.

10. An engineering machinery, characterized in that, The engineering machinery includes the air braking system according to claim 9.

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