CN218935658U - Corrugated expansion joint with noise elimination function and fixed tube plate type heat exchanger - Google Patents

Abstract

The application discloses a corrugated expansion joint with noise reduction function and a fixed tube-sheet heat exchanger. The corrugated expansion joint includes a corrugated expansion joint main body, and the corrugated expansion joint main body includes a corrugated outer shell structure and an inner deflector structure. The corrugated structure of the shell can be expanded and contracted along the axial direction, and is used for axial length compensation on the pipeline; the inner deflector structure is installed inside the corrugated structure of the shell along the axial direction, and is used to adjust the air flow in the axial direction. Air diversion function; moreover, the inner deflector structure also adopts a micro-perforated plate design, and the inner deflector structure is provided with sound-absorbing micro-holes for muffler effect on the airflow. The above-mentioned corrugated expansion joint with noise reduction function adopts the micro-perforated plate design to give the expansion joint the noise reduction function, thereby omitting the additional noise reduction device on the pipeline, achieving the purpose of simplifying the pipeline structure, and having strong integrity .

Description

A corrugated expansion joint and fixed tube-sheet heat exchanger with noise reduction function

technical field

The application relates to the technical field of expansion joints, in particular to a corrugated expansion joint with a noise reduction function and a fixed tube-sheet heat exchanger.

Background technique

Expansion joints are flexible elements that can effectively compensate for axial deformation. For example, the expansion joint welded on the shell of a fixed tube-sheet heat exchanger has large axial flexibility and is easy to deform. It can compensate the thermal expansion difference between the tube and the shell due to different wall temperatures, reduce their axial load, and reduce the tube load. , The temperature difference stress between the tube sheet and the shell, to avoid causing strength damage, instability damage and tube pull-off damage.

There are many types of expansion joints, and the commonly used structures are corrugated, ring plate welding and sandwich structures, among which corrugated expansion joints are the most widely used.

Mechanical noise and pipeline noise are key issues in the field of mechanical design and manufacturing. How to eliminate noise is one of the directions that mechanical designers have been studying. The existing technology only involves the body design of the expansion joint. When the noise reduction function needs to be realized, an additional noise reduction device is only added to the pipeline to reduce pipeline noise or mechanical noise. This design will increase the complexity of the pipeline structure and Cost, overall poor.

Utility model content

The purpose of this application is to provide a corrugated expansion joint with noise reduction function. By adopting a micro-perforated plate design, the expansion joint is given a noise reduction function, thereby omitting additional noise reduction devices on the pipeline and achieving simplified pipelines. The purpose of the structure is strong integrity. Another object of the present application is to provide a fixed tube-sheet heat exchanger using the above corrugated expansion joint.

In order to achieve the above purpose, the present application provides a bellows expansion joint with noise reduction function, which includes a bellows expansion joint main body, and the bellows expansion joint main body includes:

The corrugated structure of the shell can be expanded and contracted along the axial direction, and is used for axial length compensation on the pipeline;

The inner deflector structure is installed inside the corrugated structure of the shell along the axial direction, and is used to deflect the air flow in the axial direction; moreover, the inner deflector structure also adopts a micro-perforated plate design, so The structure of the inner deflector is provided with sound-absorbing microholes, which are used for the sound-absorbing function of the airflow.

In some embodiments, the inner deflector structure is cylindrical, the inner deflector structure is sleeved inside the corrugated structure of the shell, and the inner deflector structure guides the airflow axially inside .

In some embodiments, the inner baffle structure includes a plurality of inner baffles, the plurality of inner baffles are nested one by one, and each of the inner baffles is provided with the sound-absorbing microholes .

In some embodiments, the sound-absorbing microholes are uniformly arranged on the circumferential surface of the inner deflector.

In some embodiments, the inner baffle structure includes:

The first inner baffle is arranged close to the first end of the main body of the corrugated expansion joint, and is sleeved on the corrugated structure of the outer shell;

The second inner deflector is arranged close to the second end of the main body of the corrugated expansion joint, and is sleeved on the first inner deflector.

In some embodiments, the diameter of the sound-absorbing micropores is less than 1mm, and the perforation rate is 1%-3%.

Another object of the present application is to provide a fixed tube-sheet heat exchanger using the above-mentioned corrugated expansion joint with noise reduction function.

With respect to the above-mentioned background technology, the bellows expansion joint with noise reduction function provided by the present application includes the main body of the bellows expansion joint, and the main body of the bellows expansion joint includes a shell corrugated structure and an inner deflector structure; wherein, the shell corrugated structure can be direction expansion and contraction, which is used for axial length compensation on the pipeline; the inner deflector structure is installed inside the corrugated structure of the shell along the axial direction, and is used to guide the airflow in the axial direction; and, the inner deflector The structure also adopts a micro-perforated plate design, and the inner deflector structure is provided with sound-absorbing micro-holes for the sound-absorbing effect on the airflow.

The above-mentioned corrugated expansion joint with noise reduction function adopts the micro-perforated plate design to give the expansion joint the noise reduction function, thereby omitting the additional noise reduction device on the pipeline, achieving the purpose of simplifying the pipeline structure, and having strong integrity .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Figure 1 is an overall schematic diagram of a corrugated expansion joint with a noise reduction function provided by an embodiment of the present application;

Fig. 2 is a schematic cross-sectional view of a corrugated expansion joint with a noise reduction function provided by an embodiment of the present application;

Fig. 3 is a partially enlarged schematic diagram of a corrugated expansion joint with a noise reduction function provided by an embodiment of the present application;

Fig. 4 is a schematic structural diagram of an interface flange of an expansion joint provided in an embodiment of the present application.

in:

10-Corrugated expansion joint main body,

11-shell corrugated structure, 12-inner deflector structure,

1210-the first inner deflector, 1220-the second inner deflector,

1201-Anechoic Microhole;

20-expansion joint interface flange.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

Please refer to Figures 1 to 4, wherein Figure 1 is an overall schematic diagram of the bellows expansion joint with noise reduction function provided by the embodiment of the present application, and Figure 2 is a cross-section of the bellows expansion joint with noise reduction function provided by the embodiment of the present application Schematic diagram, Fig. 3 is a partially enlarged schematic diagram of a corrugated expansion joint with noise reduction function provided by the embodiment of the present application, and Fig. 4 is a schematic structural diagram of the interface flange of the expansion joint provided by the embodiment of the present application.

In the first specific embodiment, the present application provides a corrugated expansion joint with noise reduction function, which mainly includes two parts, as shown in FIG. 1 , which are the corrugated expansion joint main body 10 and the expansion joint interface flange 20 , the number of expansion joint interface flanges 20 is a pair, and a pair of expansion joint interface flanges 20 are connected to both ends of the main body 10 of the corrugated expansion joint; the corrugated expansion joint not only has the basic function of the traditional expansion joint, but also has the function of noise reduction .

In this embodiment, the main body 10 of the corrugated expansion joint mainly includes two parts, as shown in FIG. 2 , which are the outer shell corrugated structure 11 and the inner deflector structure 12 respectively.

Wherein, the shell corrugated structure 11 can expand and contract along the axial direction, and is used for axial length compensation on the pipeline.

The inner deflector structure 12 is installed inside the corrugated structure 11 of the shell along the axial direction, and is used for guiding the airflow in the axial direction. Moreover, the inner deflector structure 12 also adopts a micro-perforated plate design, that is, the inner deflector structure 12 is provided with noise-absorbing microholes 1201, and the noise-absorbing microholes 1201 make the inner deflector structure 12 form a micro-perforated plate structure, Used to dampen air flow.

In summary, the purpose of this application is to provide a corrugated expansion joint with noise reduction function. Its main structural features are as follows: one is the inner deflector structure 12, which guides the airflow; the other is the corrugated structure 11 of the outer shell , to expand and compress the airflow, and compensate for deformation; the third is the micro-perforated plate structure, which plays the role of sound absorption and noise reduction.

Compared with the existing technology, the corrugated expansion joint with noise reduction function adopts the micro-perforated plate design to give the expansion joint the noise reduction function, thereby omitting the additional noise reduction device on the pipeline, and achieving the goal of simplifying the pipeline structure. Purpose, strong integrity.

It should be noted that the micro-perforated plate structure (inner deflector structure 12 provided with noise-absorbing micro-holes 1201) can choose different perforation ratios and cavity depths with different plate thicknesses, so that the spectral performance of the muffler can be controlled, so that it can be used in Good noise reduction effect is obtained in the required frequency range.

It should be noted that the working principle of the micro-perforated plate structure can refer to the micro-perforated plate acoustic structure in the prior art. The acoustic structure of micro-perforated plates is widely used in the field of noise reduction technology. Micro-perforated plate mufflers are made of metal perforated sheets. Common micro-perforated plates can be steel plates (tubes), stainless steel plates (tubes), alloy plates (tubes), etc. Made of materials, relying on the micro-perforated plate and the corresponding cavity behind it to form many parallel Helmholtz resonators, when the frequency of the incident sound wave is consistent with the resonance frequency of the air conditioning ventilation system, the airflow passes through the micro-perforated plate to generate intense vibration Friction can form absorption peaks and significantly attenuate sound energy.

In some embodiments, the number and size of the expansion joints of the corrugated structure 11 of the shell can be set according to actual needs, and should also belong to the description scope of this embodiment.

It should be noted that this embodiment only limits the composition of the bellows expansion joint, and does not limit the shape of the bellows expansion joint and its components; Personnel have the ability to apply it to technical solutions of different shapes, such as square, circular, etc., that is, square tube-shaped corrugated expansion joints and cylindrical corrugated expansion joints should belong to the description scope of this embodiment.

In some embodiments, the inner deflector structure 12 is cylindrical (such as a cylinder), and the inner deflector structure 12 is set inside the corrugated structure 11 of the shell, and the inner deflector structure 12 controls the air flow in the axial direction. diversion.

In this embodiment, referring to Fig. 1 to Fig. 4, it can be understood that the cross section of the main body of the corrugated expansion joint is circular, which is embodied in the cross section of the main body 10 of the corrugated expansion joint and the interface flange 20 of the expansion joint, and the corrugated expansion joint Section of the outer shell corrugated structure 11 and the inner baffle structure 12 in the joint body 10 . The inner deflector structure 12 is installed inside the corrugated structure 11 of the shell, and is designed in a cylindrical shape adaptively, so that the cylindrical inner deflector structure 12 is set inside the corrugated structure 11 of the circular shell. At this time, a certain distance is left between the inner deflector structure 12 and the corrugated structure 11 of the outer shell, so that the micro-perforated plate structure uses holes and cavities for noise reduction. In addition, the direction of the central axis of the inner deflector structure 12 coincides with the axial direction of the shell corrugated structure 11, and the inner wall of the cylinder of the inner deflector structure 12 guides the airflow in the axial direction to avoid divergence of the airflow direction. direction flow.

It should be noted that this embodiment only limits the structural form of the inner deflector structure 12, and does not limit the number of the inner deflector structure 12, therefore, including one or more than one scheme , for different quantitative forms, they should also belong to the description scope of this embodiment.

In some embodiments, the inner deflector structure 12 is composed of multiple monomers, that is, the inner deflector structure 12 includes a plurality of inner deflectors, the inner deflectors are cylindrical, and the plurality of inner deflectors are one by one Nested, each inner deflector is provided with sound-absorbing microholes 1201 .

In this embodiment, the inner deflector structure 12 is composed of multiple inner deflectors and the multiple inner deflectors are nested one by one, the inner deflector structure 12 is a multi-layer inner plate structure , the basic function of the multi-layer inner plate structure is to guide the airflow, and the advanced function is to use the sound-absorbing micro-holes 1201 to eliminate noise. The inner plate structure moves with the expansion and contraction of the corrugated structure 11 of the outer shell, so as to ensure the free movement of both ends of the main body 10 of the corrugated expansion joint.

Exemplarily, as shown in FIG. 2 and FIG. 3 , the sound-absorbing microholes 1201 are evenly arranged on the circumferential surface of the inner deflector.

In this embodiment, the distance between the sound-absorbing microholes 1201 is equal everywhere in the circumferential and axial directions of the inner deflector, so that a plurality of sound-absorbing microholes 1201 can be evenly arranged, and the sound-absorbing function can be fully guaranteed .

In a specific embodiment, the inner deflector structure 12 is composed of two inner deflectors, and the inner deflector structure 12 at this time is a double-layer inner plate structure.

In this embodiment, the inner baffle structure 12 includes a first inner baffle 1210 and a second inner baffle 1220 . Wherein, the first inner deflector 1210 is arranged close to the first end of the corrugated expansion joint body 10, and is fitted on the corrugated structure 11 of the shell; the second inner deflector 1220 is arranged near the second end of the corrugated expansion joint main body 10, and is fitted on the corrugated structure 11 of the outer shell; The first inner deflector 1210 .

It should be noted that there are many specific installation methods for the first inner deflector 1210 and the second inner deflector 1220, for example, the first inner deflector 1210 and the second inner deflector 1220 may be movably connected as One body (such as the form of the chute and the slider), and then installed respectively inside the corrugated structure 11 of the shell (such as a movable connection, or a fixed connection); it can also be the first inner deflector 1210 and the corrugated expansion joint The expansion joint interface flange 20 at the first end of the main body 10 is connected, the second inner deflector 1220 is connected with the expansion joint interface flange 20 at the second end of the corrugated expansion joint main body 10, and the first inner deflector 1210 is connected with the second inner deflector The deflector 1220 is movably connected; no matter which specific installation method is used above, it should also belong to the description scope of this embodiment.

In some embodiments, the thickness of the first inner deflector 1210 and the second inner deflector 1220 is generally less than 1mm, and the thickness and cavity depth can be set according to actual needs, which should also belong to the description scope of this embodiment .

In some embodiments, on the first inner deflector 1210 and the second inner deflector 1220, a drill bit with a diameter of less than 1 mm is generally used to perforate the hole, the diameter of the sound-absorbing microhole 1201 is less than 1 mm, and the perforation rate is 1%- 3%, the size of different sound-absorbing microholes 1201 is the same, and its specific aperture, perforation rate, axial and radial hole spacing, axial and radial hole rows can be set according to actual needs, and should also belong to this embodiment range of descriptions.

In addition, the flange size, thickness, and flange hole layout of the expansion joint interface flange 20 can be set according to actual needs, and should also belong to the description scope of this embodiment.

In summary, the corrugated expansion joint is used in the technical field of conveying equipment, which is beneficial to the elimination of pipeline and mechanical noise. Its main structural features: one is the double-layer inner plate structure, which guides the airflow; the other is the shell The corrugated structure 11 expands and compresses the airflow and compensates for deformation; the third is a micro-perforated plate structure for noise reduction. When in use, the airflow passes through the sound-absorbing micropores 1201 of the micro-perforated plate structure and then enters the shell corrugated structure 11 to expand and compress to compensate for deformation. Different perforation ratios and cavity depths with different plate thicknesses can control the spectral performance of the sound attenuation, so that it can obtain a good sound attenuation effect in the required frequency range.

The advantages of the corrugated expansion joint are as follows:

The integration of the expansion joint and the muffler device simplifies the pipeline structure, reduces the difficulty of assembly and saves assembly time;

The inner plate of the expansion joint is double-layered, and the double-layer structure guides the airflow into the corrugated structure, which plays a role in guiding the flow while ensuring the free movement of both ends of the expansion joint;

The corrugated structure of the shell expands and compresses the airflow introduced to compensate for deformation;

Micro-perforated plate structure, set the micro-hole diameter, perforation rate, axial and radial hole spacing according to the actual noise frequency to eliminate the required noise frequency;

By choosing different perforation ratios and cavity depths with different plate thicknesses, the spectral performance of the muffler can be controlled so that a good noise reduction effect can be obtained within the required frequency range.

Another purpose of the present application is to provide a fixed tube-sheet heat exchanger using the above-mentioned bellows expansion joint with noise reduction function, which should have all the beneficial technical effects of the above-mentioned bellows expansion joint with noise reduction function, which will not be repeated here repeat.

It should be noted that many of the components mentioned in this application are common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such relationship between these entities. Actual relationship or sequence.

The corrugated expansion joint with noise reduction function and the fixed tube-sheet heat exchanger provided by this application have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims (7)

1. A bellows expansion joint with a sound damping function, comprising a bellows expansion joint body (10), characterized in that the bellows expansion joint body (10) comprises:

the shell corrugated structure (11) can stretch along the axial direction and is used for compensating the axial length of the pipeline;

the inner guide plate structure (12) is arranged in the corrugated structure (11) of the outer shell along the axial direction and is used for guiding the airflow in the axial direction; and, interior guide plate structure (12) still adopts microperforated plate formula design, interior guide plate structure (12) are provided with noise elimination micropore (1201) for carry out the noise elimination effect to the air current.

2. The corrugated expansion joint with the silencing function according to claim 1, wherein the inner guide plate structure (12) is cylindrical, the inner guide plate structure (12) is sleeved inside the outer shell corrugated structure (11), and the inner guide plate structure (12) axially guides air flow inside.

3. The corrugated expansion joint with the sound elimination function according to claim 2, wherein the inner baffle structure (12) comprises a plurality of inner baffles, the inner baffles are nested one by one, and each inner baffle is provided with the sound elimination micropore (1201).

4. A corrugated expansion joint with a sound-deadening function according to claim 3, wherein the sound-deadening micro-holes (1201) are uniformly arranged on the circumferential surface of the inner baffle.

5. A bellows expansion joint with sound damping function according to claim 3, characterized in that the inner baffle structure (12) comprises:

the first inner guide plate (1210) is arranged near the first end of the corrugated expansion joint main body (10) and sleeved on the shell corrugated structure (11);

and the second inner guide plate (1220) is arranged close to the second end of the corrugated expansion joint main body (10) and sleeved on the first inner guide plate (1210).

6. The corrugated expansion joint with the sound elimination function according to any one of claims 1 to 5, characterized in that the pore diameter of the sound elimination micropore (1201) is smaller than 1mm, and the penetration rate is 1% -3%.

7. A fixed tube and plate heat exchanger employing a bellows expansion joint having a sound damping function as claimed in any one of claims 1 to 6.

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