Silencing structure

Abstract

The utility model relates to the field of petrochemical engineering, in particular to a silencing structure. Comprising a pipe body; the connecting rod extends into the pipe body and is movably connected with the pipe body; the first silencing structures are arranged on the connecting rod, and the first silencing structures are sequentially arranged at intervals in the axial direction of the connecting rod; and the second silencing structures are arranged between the adjacent first silencing structures. According to the device, through the first noise reduction structure and the second noise reduction structure which are arranged in a staggered mode, noise generated in the pressure relief process of the liquid nitrogen storage tank can be reduced, a better noise reduction effect can be achieved through combination of the two different noise reduction structures, meanwhile, the first noise reduction structure and the second noise reduction structure can be replaced through the arranged connecting rod, and the noise reduction effect is better. Therefore, the silencing effect of the device is guaranteed, noise can be reduced, interference of the noise to personnel near the air storage tank is reduced, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical industry, and particularly relates to a sound insulation structure. Background Art

[0002] In the prior art, liquid nitrogen storage tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transport tanks; liquid nitrogen storage tanks are mainly used for static storage of liquid nitrogen indoors and are not suitable for long-distance transportation in the working state; liquid nitrogen transport tanks are specially designed for shock absorption to meet the transportation conditions.

[0003] A pressure relief valve is provided on the liquid nitrogen storage tank to avoid potential safety hazards caused by excessive internal air pressure in the liquid nitrogen storage tank. However, when discharging outward through the pressure relief valve, due to the rapid flow of gas, a relatively large noise will be generated, disturbing the personnel near the gas storage tank and posing certain potential safety hazards. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sound insulation structure to solve the noise problem generated during the pressure relief process of the liquid nitrogen storage tank in the background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The sound insulation structure of the utility model includes:

[0007] A pipe body;

[0008] A connecting rod, which extends into the pipe body and is movably connected to the pipe body;

[0009] A plurality of first sound insulation structures are arranged on the connecting rod, and the first sound insulation structures are arranged at intervals along the axial direction of the connecting rod;

[0010] A plurality of second sound insulation structures are arranged between adjacent first sound insulation structures.

[0011] As a further improvement, the first sound insulation structure includes a fixing plate, and at least one sound insulation hole is provided on the fixing plate.

[0012] As a further improvement, the sound insulation holes on adjacent first sound insulation structures are arranged in a staggered manner in sequence.

[0013] As a further improvement, the second sound insulation structure is wound around the connecting rod between adjacent first sound insulation structures.

[0014] As a further improvement, the second sound insulation structure is a sound insulation net or a sound insulation cotton.

[0015] As a further improvement, the connecting rod is of a hollow structure, and a plurality of through holes are provided on the connecting rod.

[0016] As a further improvement, a hand-held portion is provided at one end of the connecting rod away from the first sound insulation structure or at one end of the second sound insulation structure.

[0017] As a further improvement, the pipe body includes a connected first pipe body and a second pipe body, and an included angle is provided between the first pipe body and the second pipe body.

[0018] As a further improvement, the included angle is between 30° and 45°.

[0019] As a further improvement, the size of the second pipe body is adapted to the size of the connecting rod.

[0020] The utility model has achieved the following technical effects compared with the prior art:

[0021] Through the staggered first sound insulation structure and the second sound insulation structure, the device can reduce the noise generated during the pressure relief process of the liquid nitrogen storage tank. The combination of two different sound insulation structures can achieve a better sound insulation effect. At the same time, the provided connecting rod can be used to replace the first sound insulation structure and the second sound insulation structure, so as to ensure the sound insulation effect of the device, reduce noise, reduce the interference of noise to the personnel near the gas storage tank, and avoid potential safety hazards.

[0022] The device has a simple structure and is easy to use. When the device is installed on the gas outlet pipeline of the liquid nitrogen storage tank, the noise can be reduced during the pressure relief process. When the noise reduction effect of the device decreases, only the connecting rod needs to be replaced to achieve the replacement of the sound insulation structure, and the sound insulation effect can be ensured at all times. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the sound insulation structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the partial structure of the sound insulation structure of the utility model.

[0025] Reference numerals: 1, pipe body; 11, first pipe body; 12, second pipe body; 2, first sound insulation structure; 21, sound insulation hole; 3, second sound insulation structure; 4, connecting rod. Detailed Description of the Embodiment

[0026] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0027] In this specification, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] Examples of the present application will be described in detail below. The examples are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The examples described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0029] As Figure 1 and Figure 2 shown, the silencing structure of the present utility model includes: a pipe body 1; a connecting rod 4, the connecting rod 4 extends into the pipe body 1 and is movably connected to the pipe body 1; a plurality of first silencing structures 2, the first silencing structures 2 are arranged on the connecting rod 4, and the first silencing structures 2 are sequentially arranged at intervals along the axial direction of the connecting rod 4; a plurality of second silencing structures 3, the second silencing structures 3 are arranged between adjacent first silencing structures 2.

[0030] In the embodiment, the pipe body 1 is as Figure 1 shown. The pipe body 1 is connected to the gas outlet pipeline of the liquid nitrogen storage tank. By cooperating the pipe body 1 with the silencing structure arranged on the connecting rod 4, the noise generated during the pressure relief process of the liquid nitrogen storage tank can be silenced.

[0031] The first silencing structure 2 includes a fixing plate, and at least one silencing hole 21 is arranged on the fixing plate. The adjacent silencing holes 21 are arranged in a staggered manner in sequence. As Figure 2 shown, in the embodiment, the first silencing structure 2 is arranged on the connecting rod 4. The first silencing structure 2 is specifically a fixing plate, and the shape of the fixing plate can be circular or square, preferably circular; a plurality of silencing holes 21 are arranged on the fixing plate, and the silencing holes 21 can be used to eliminate noise. The silencing holes 21 can change the propagation path and direction of sound waves, causing the sound waves to reflect and scatter on the orifice plate, thereby reducing the straight-line propagation and diffusion of noise. At the same time, in the embodiment, each silencing structure has a certain aperture and hole pitch for the silencing holes 21, and the specific aperture and hole pitch sizes are determined according to the specific use scenario, so no specific limitation is made here; the silencing holes 21 can change the flow velocity and flow direction of the gas, thereby adjusting the flow characteristics of the gas. While controlling the gas flow distribution, the silencing holes 21 can reduce the noise generated due to the gas flow movement.

[0032] In the embodiment, the material of the sound absorption holes 21 should have good acoustic performance and durability. The preferably adopted materials include metal materials such as aluminum alloy and stainless steel, as well as sound absorption materials, etc.

[0033] As Figure 2 shown, in the embodiment, the sound absorption holes 21 of adjacent first sound absorption structures 2 are arranged staggeredly, that is, the sound absorption holes 21 do not overlap. The purpose of such a setting is that on the one hand, it can make the path of the air flow become circuitous when passing through the sound absorption structure, thereby increasing the flow resistance and time of the air flow, reducing the speed and pressure fluctuation of the air flow, and further reducing the generation and propagation of noise, effectively reducing the sharp or harsh noise generated during the operation of the equipment; on the other hand, the staggered sound absorption holes 21 can make the frequency spectrum distribution of the noise more uniform, avoid the concentrated generation of single-frequency noise, make the overall noise sound softer, and reduce the irritation to the human ear.

[0034] The second sound absorption structure 3 is wound around the connecting rod 4 between adjacent first sound absorption structures 2. The second sound absorption structure 3 is a sound absorption net or a sound absorption cotton. In the embodiment, the second sound absorption structure 3 and the first sound absorption structure 2 are arranged staggeredly. In this way, when the noise passes through, its propagation path is changed and extended multiple times, which can increase the propagation distance of the noise in the device, make the noise continuously attenuated and consumed during the propagation process. In addition, the first sound absorption structure 2 is different from the second sound absorption structure 3, which can effectively control different frequency noises and improve the frequency response range of the entire sound absorption device.

[0035] In the embodiment, the second sound absorption structure 3 preferably adopts sound absorption cotton, which is a roll-shaped / sheet-shaped material processed from single or multiple different fibers through multiple processes. It uses the porosity and elasticity of the fibers to absorb the sound wave energy and convert it into heat energy for dissipation, thereby achieving the effect of reducing noise; in the embodiment, the sound absorption cotton is usually made of fireproof materials such as polyester fiber, has excellent flame retardant performance, and at the same time, the sound absorption cotton is light and delicate, easy to cut, splice and install, and can be wound around the adjacent first sound absorption structures 2.

[0036] The connecting rod 4 is of a hollow structure, and a plurality of through holes are provided on the connecting rod 4. A hand-held part is provided at one end of the connecting rod 4 away from the first sound absorption structure 2 or at one end of the second sound absorption structure 3. In the embodiment, the connecting rod 4 can connect the first sound absorption structure 2 and the second sound absorption structure 3 together. In this way, by separating the connecting rod 4 from the pipe body 1, the connecting rod 4, the first sound absorption structure 2 and the second sound absorption structure 3 can be replaced.

[0037] In the embodiment, a plurality of through holes are also provided on the connecting rod 4. By using these through holes, part of the noise can be absorbed inside the connecting rod 4 or on the inner wall of the pipe body 1 corresponding to the through holes, thereby further improving the sound absorption effect.

[0038] The pipe body 1 includes a connected first pipe body 11 and a second pipe body 12, where an included angle is formed between the first pipe body 11 and the second pipe body 12. The included angle is between 30° and 45°. The size of the second pipe body 12 is adapted to the size of the connecting rod 4.

[0039] As shown in the embodiment Figure 1 As shown, the pipe body 1 is composed of a connected first pipe body 11 and a second pipe body 12. Among them, the second pipe body 12 is mainly connected to the gas outlet pipeline of the liquid nitrogen storage tank. The first pipe body 11 is arranged facing the air. An included angle is formed between the first pipe body 11 and the second pipe body 12, and the first pipe body 11 extends a certain distance along the direction of the second pipe body 12 and then is connected to the second pipe body 12; the specific range of the included angle is between 30° and 45°, preferably 30°, so that the formed included angle facilitates noise to enter the first pipe body 11 through the second pipe body 12.

[0040] In the embodiment, the length of the pipe body 1 is not limited, and the length of the pipe body 1 can be selected according to the air pressure of the liquid nitrogen storage tank. Similarly, the length of the connecting rod 4 is also adaptively changed according to the length of the pipe body 1; in order to ensure the stability and firmness of the connection between one end of the second pipe body 12 and the gas outlet pipeline of the liquid nitrogen storage tank, structures such as flanges, threaded pipes or others can be set for connection to achieve a better connection effect and ensure that the flange and threaded pipe do not separate from the gas outlet pipeline of the liquid nitrogen storage tank; similarly, when the connecting rod 4 extends into the pipe body 1, in order to ensure the connectivity between the connecting rod 4 and the second pipe body 12, when the connecting rod 4 extends into the second pipe body 12, a connection method with buckles provided in the second pipe body 12 and on the connecting rod 4 can be adopted to ensure the connection effect between the connecting rod 4 and the second pipe body 12. Of course, other connection methods with other structures can also be adopted.

[0041] Through the staggered first sound-absorbing structure and second sound-absorbing structure, this device can reduce the noise generated during the pressure relief process of the liquid nitrogen storage tank. The combination of two different sound-absorbing structures can achieve a better sound-absorbing effect. At the same time, the connecting rod provided can be used to replace the first sound-absorbing structure and the second sound-absorbing structure, thereby ensuring the sound-absorbing effect of this device, being able to reduce noise, reduce the interference of noise to the personnel near the gas storage tank, and avoid potential safety hazards. This device has a simple structure and is easy to use. When this device is installed on the gas outlet pipeline of the liquid nitrogen storage tank, it can reduce noise during the pressure relief process. When the noise reduction effect of this device decreases, only by replacing the connecting rod can the sound-absorbing structure be replaced, and the sound-absorbing effect can be ensured at all times.

[0042] It should be noted that in the description of this application, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0043] Any process or method description depicted in the flowchart or described otherwise herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where functions may be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0044] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A sound-absorbing structure, characterized in that: include: tube body; A connecting rod, the connecting rod extends into the tube body and is movably connected to the tube body; A plurality of first silencer structures, wherein the first silencer structures are arranged on the connecting rod, wherein the first silencer structures are arranged in sequence and spaced apart along the axial direction of the connecting rod; A plurality of second sound-absorbing structures are provided, wherein the second sound-absorbing structures are arranged between adjacent first sound-absorbing structures.

2. The sound-absorbing structure according to claim 1, characterized in that: The first sound-absorbing structure comprises a fixing plate, and at least one sound-absorbing hole is arranged on the fixing plate.

3. The sound-absorbing structure according to claim 2, characterized in that: The sound-absorbing holes on adjacent first sound-absorbing structures are arranged alternately in sequence.

4. The sound-absorbing structure according to claim 1, characterized in that: The second sound-absorbing structure is wound around the connecting rod between adjacent first sound-absorbing structures.

5. The sound-absorbing structure according to claim 4, characterized in that: The second sound-absorbing structure is a sound-absorbing net or sound-absorbing cotton.

6. The sound-absorbing structure according to claim 1, characterized in that: The connecting rod is a hollow structure and is provided with a plurality of through holes.

7. The sound-absorbing structure according to claim 6, characterized in that: The connecting rod is provided with a hand grip at one end away from the first sound-absorbing structure or at one end of the second sound-absorbing structure.

8. The sound-absorbing structure according to claim 1, characterized in that: The tube body comprises a first tube body and a second tube body connected to each other, wherein the first tube body and the second tube body are arranged at an angle.

9. The sound-absorbing structure according to claim 8, characterized in that: The angle is between 30° and 45°.

10. The sound-absorbing structure according to claim 8, characterized in that: The size of the second tube body is adapted to the size of the connecting rod.

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