A noise reduction device for a vacuum pump

Abstract

The embodiment of the present application provides a kind of sound attenuation and noise reduction device for vacuum pump, belong to vacuum pump technology, the sound attenuation and noise reduction device for vacuum pump includes main box, inside is divided and forms by lower to upper sequentially arranged first cavity, second cavity and third cavity, first cavity is communicated with second cavity;Water inlet pipe is inserted in main box, and from third cavity extends to first cavity by second cavity, water inlet pipe has liquid outlet part and leakage part, liquid outlet part is located in first cavity and is communicated with first cavity, leakage part is located in second cavity and is communicated with second cavity, water inlet pipe is used to connect the circulating water liquid outlet end of vacuum pump;Connecting pipe is communicated with first cavity and third cavity;Water outlet pipe is communicated with third cavity, for guiding the circulating water that enters third cavity through first cavity is discharged from main box.The sound attenuation and noise reduction device for vacuum pump provided in the embodiment of the present application can reduce the noise when the circulating water of vacuum pump is discharged.

Description

Technical Field

[0001] This application relates to vacuum pump technology, and more particularly to a noise reduction device for vacuum pumps. Background Technology

[0002] Water ring vacuum pumps are widely used in chemical, pharmaceutical, and food industries. A water ring vacuum pump includes a pump body, an impeller located in the pump body, and a drain pipe connected to the pump body. The circulating water entering the pump body forms a water ring seal. The sealed water ring and the eccentrically rotating impeller form a variable volume. The circulating water is discharged from the pump body through the drain pipe.

[0003] In related technologies, when a water ring vacuum pump discharges circulating water, the noise from the high-speed water flow, the impact noise generated by the high-speed water flow, and the sound of bubbles bursting can cause the water ring vacuum pump to be quite noisy. Utility Model Content

[0004] This application provides a noise reduction device for vacuum pumps to solve the technical problem of excessive noise in water ring vacuum pumps when discharging circulating water in related technologies.

[0005] This application provides a noise reduction device for a vacuum pump, comprising:

[0006] The main housing is internally divided into a first cavity, a second cavity, and a third cavity arranged sequentially from bottom to top, with the first cavity and the second cavity being connected.

[0007] An inlet pipe is inserted into the main housing and extends from the third cavity through the second cavity to the first cavity. The inlet pipe has an outlet section and a leakage section. The outlet section is located in the first cavity and communicates with the first cavity. The leakage section is located in the second cavity and communicates with the second cavity. The inlet pipe is used to connect to the circulating water outlet end of the vacuum pump.

[0008] A connecting pipe connects the first cavity and the third cavity;

[0009] The water outlet pipe is connected to the third chamber and is used to guide the circulating water that enters the third chamber through the first chamber to be discharged from the main tank.

[0010] In some possible implementations, the water inlet pipe has a liquid inlet section located outside the main tank, and the liquid outlet end of the water outlet pipe is located outside the main tank.

[0011] In some possible implementations, the main tank is provided with at least two partitions, each of which is connected to the inlet pipe, the connecting pipe and the outlet pipe. The partitions are used to divide the internal space of the main tank into the first cavity, the second cavity and the third cavity.

[0012] In some possible implementations, a gap exists between one of the partitions and the side wall of the main housing, the gap connecting the first cavity and the second cavity.

[0013] In some possible implementations, the partition between the first cavity and the second cavity is provided with a seepage hole, the seepage hole connecting the first cavity and the second cavity.

[0014] In some possible implementations, the two ends of the connecting pipe are respectively connected to the two partitions, and the end of the connecting pipe is flush with the partition corresponding to the end of the connecting pipe.

[0015] In some possible implementations, a drain valve is provided at the bottom of the main housing, and the drain valve is closable and openable to the first cavity.

[0016] In some possible implementations, the leakage part is a leakage hole provided on the water inlet pipe, and there are multiple leakage holes, which are evenly arranged at intervals on the water inlet pipe.

[0017] In some possible implementations, the main housing is covered with a noise-reducing layer.

[0018] In some possible implementations, at least one of the main housing, the connecting pipe, the water outlet pipe, and the water inlet pipe is a metal component.

[0019] The noise reduction device for a vacuum pump provided in this application extends the inlet pipe into the first chamber. Circulating water discharged from the vacuum pump enters the first chamber through the inlet pipe. The first chamber buffers the impact force of the circulating water flow, slowing down the flow and converting kinetic energy into eddies. Compared to the vacuum pump directly discharging circulating water, this avoids the turbulent noise caused by direct discharge, thus reducing noise when the water ring vacuum pump discharges circulating water. Furthermore, the circulating water enters the second chamber through the leakage section of the inlet pipe. In the second chamber, the circulating water forms a small-flow diversion and pressure relief, which helps reduce the velocity of the main water flow entering the first chamber, thereby reducing the noise caused by the high-velocity circulating water directly impacting the main tank and lowering the noise of the circulating water flow within the main tank. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 This is a schematic diagram of the structure of the noise reduction device for a vacuum pump in an embodiment of this application;

[0022] Figure 2 for Figure 1 Schematic diagram of the fit between the internal partition of the main box and the main box;

[0023] Figure 3 This is a schematic diagram showing the cooperation between the internal partition and the main body of the main box in another embodiment of this application.

[0024] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0025] Explanation of reference numerals in the attached figures

[0026] 100. Main box;

[0027] 110. First cavity; 120. Second cavity; 130. Third cavity;

[0028] 200. Water inlet pipe;

[0029] 210. Liquid outlet;

[0030] 220. Leaking section; 221. Leaking hole;

[0031] 230. Liquid inlet section;

[0032] 300. Connecting pipe;

[0033] 400. Water outlet pipe; 410. Liquid outlet end;

[0034] 500, partition; 501, seepage hole; 502, gap;

[0035] 600. Drain valve. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0040] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0041] As mentioned in the background art, in related technologies, when a water ring vacuum pump discharges circulating water, the presence of air bubbles in the circulating water, along with the impact noise generated by the high-speed water flow and the sound of air bubbles bursting, can cause the water ring vacuum pump to be quite noisy, thus limiting the operating environment of the water ring vacuum pump.

[0042] Therefore, this application provides a noise reduction device for a vacuum pump. By extending the inlet pipe into the first chamber, the circulating water discharged from the vacuum pump enters the first chamber through the inlet pipe. The first chamber buffers the impact force of the circulating water flow, and the water flow is slowed down, converting kinetic energy into eddies, thus reducing the noise generated by turbulence. In addition, the circulating water enters the second chamber through the leakage part of the inlet pipe. The circulating water forms a small flow diversion and pressure relief in the second chamber, which helps to reduce the main water flow velocity entering the first chamber, which helps to alleviate the impact of the water flow entering the main tank and reduce the noise when the water ring vacuum pump discharges circulating water.

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] like Figure 1 As shown, the noise reduction device for a vacuum pump according to an embodiment of this application includes a main housing 100, an inlet pipe 200, a connecting pipe 300, and an outlet pipe 400.

[0045] The main housing 100 is internally divided into a first cavity 110, a second cavity 120, and a third cavity 130, arranged sequentially from bottom to top. The first cavity 110 is connected to the second cavity 120. A water inlet pipe 200 is inserted into the main housing 100 and extends from the third cavity 130 to the first cavity 110. The water inlet pipe 200 has an outlet section 210 and a leakage section 220. The outlet section 210 is located in the first cavity 110, and the leakage section 220 is located in the second cavity 120 and is connected to the second cavity 120. The water inlet pipe 200 is used to connect to the circulating water outlet of the vacuum pump. A connecting pipe 300 connects the first cavity 110 and the third cavity 130. A water outlet pipe 400 is connected to the third cavity 130 and is used to guide the circulating water that has entered the third cavity 130 through the first cavity 110 to be discharged from the main housing 100.

[0046] As can be seen from the above description, the noise reduction device for a vacuum pump provided in this application embodiment utilizes the three cavities formed by the main housing 100. By extending the water inlet pipe 200 into the first cavity 110, the circulating water discharged from the vacuum pump enters the first cavity 110 through the water inlet pipe 200. The first cavity 110 buffers the impact force of the circulating water flow, and the water flow is slowed down, converting kinetic energy into eddies. This avoids the noise generated by turbulence caused by the direct discharge of circulating water by a traditional vacuum pump. In addition, the circulating water enters the second cavity 120 through the leakage part 220 of the water inlet pipe 200. The circulating water forms a small flow rate and pressure relief in the second cavity 120, which helps to reduce the main water flow velocity entering the first cavity 110, which helps to alleviate the impact of the water flow entering the main housing 100 and reduce the noise when the water ring vacuum pump discharges circulating water.

[0047] In this embodiment, the vacuum pump can be a liquid ring vacuum pump or a water ring vacuum pump in the related technology. The water inlet pipe 200 of the noise reduction device is connected to the circulating water outlet of the vacuum pump. After the high-speed water flow is buffered by the expansion of the first cavity 110, the pressure is released by the leakage part 220 of the water inlet pipe 200, which facilitates the breaking of air bubbles in the gas-liquid mixture and alleviates the noise problem of the vacuum pump.

[0048] In some embodiments, such as Figure 1 and Figure 2 As shown, the water inlet pipe 200 has a liquid inlet section 230, which is located outside the main tank 100, and the liquid outlet end 410 of the water outlet pipe 400 is located outside the main tank 100.

[0049] The inlet pipe 200 and the outlet pipe 400 can be made of corrosion-resistant, high-strength metal fittings. The liquid inlet part 230 of the inlet pipe 200 protrudes from the upper end face of the main tank 100 and is connected to the circulating water outlet end of the vacuum pump. The part of the inlet pipe 200 that protrudes from the main tank 100 is provided with a prefabricated pipe joint. This prefabricated pipe joint can be directly fitted with a hose or installed with a flange, thereby facilitating a sealed connection with the circulating water outlet end of the vacuum pump.

[0050] Similarly, the outlet end 410 of the water outlet pipe 400 protrudes from the lower end face of the main tank 100. The outlet end 410 of the water outlet pipe 400 can be directly connected to the external drainage pool, or it can be connected to other circulating water pipes. The specific application scenario of the water pipe is not limited. The connection method of the water outlet pipe 400 with other water pipes can be set with reference to the connection method of the water inlet pipe 200 and the circulating water outlet end of the vacuum pump.

[0051] For example, the leakage part 220 of the water inlet pipe 200 is a leakage hole 221 provided on the water inlet pipe 200. There are multiple leakage holes 221, and the multiple leakage holes 221 are evenly arranged at intervals on the water inlet pipe 200.

[0052] Here, the leakage hole 221 can be a densely arranged round hole or a strip hole. The leakage hole 221 is used to discharge part of the circulating water and reduce the water pressure entering the first cavity 110. At the same time, it can also break up the air bubbles in the gas-liquid mixture and reduce the noise caused by the air bubbles.

[0053] For example, the main body 100 is provided with at least two partitions 500, each partition 500 being connected to the water inlet pipe 200, the connecting pipe 300 and the water outlet pipe 400. The partitions 500 are used to divide the internal space of the main body 100 into a first cavity 110, a second cavity 120 and a third cavity 130.

[0054] In the above embodiment, two partitions 500 are provided. Figure 1In the main body 100, both partitions 500 are welded and fixedly connected to the inlet pipe 200, the connecting pipe 300, and the outlet pipe 400, thereby further enhancing the strength and stability of each cavity within the main body 100. The main body 100 has a closed cavity structure; therefore, in the actual assembly process, each pipe can be welded to the partition 500 first, and finally the outer side panel of the main body 100 can be sealed to form an internal seal and complete the installation.

[0055] It should be noted that the upper partition 500 is welded to the inner wall of the main housing 100 to ensure the sealing of the third cavity 130. As an alternative implementation, the upper partition 500 and the inner wall of the main housing 100 can be sealed in other ways, such as by bonding and then applying sealant.

[0056] The connection method between the first cavity 110 and the second cavity 120 can be designed according to the actual assembly scenario, for example, as shown in the figure. Figure 3 As shown, there is a gap 502 between a partition 500 and the side wall of the main housing 100, and the gap 502 is used to connect the first cavity 110 and the second cavity 120.

[0057] That is, there is a gap 502 between the lower partition 500 and the side wall of the main body 100. This gap 502 is used to allow water in the second cavity 120 to leak into the first cavity 110, thereby connecting the first cavity 110 and the second cavity 120. Of course, gaps 502 can be provided between all four side walls of the main body 100 and the partition 500, or only between one or two side walls and the partition 500. The lower partition 500 and the main body 100 can be connected by bolts or spot welding, as long as there is a gap 502 to allow the circulating water in the second cavity 120 to leak into the first cavity 110.

[0058] like Figure 2 As shown, as an alternative implementation, a partition 500 is provided with a water seepage hole 501, which is used to connect the first cavity 110 and the second cavity 120.

[0059] That is, both partitions 500 are fully welded to the side walls of the main housing 100, or bonded and then sealed with sealant. The lower partition 500 has multiple drainage holes 501, which allow water from the second cavity 120 to leak into the first cavity 110, thus connecting the first cavity 110 and the second cavity 120. The number and location of the drainage holes 501 can be found in [reference needed]. Figure 2 The seepage hole 501 shown in the diagram is designed to allow the circulating water in the second cavity 120 to seep into the first cavity 110.

[0060] It should be noted that the liquid outlet 210 of the inlet pipe 200 is a direct outlet, and the leakage outlet 220 is a leakage outlet. Therefore, the liquid flow rate of the leakage outlet 220 located in the second cavity 120 is significantly lower than that of the liquid outlet 210 located in the first cavity 110. The function of the leakage outlet 220 tends to divert and relieve pressure. At the same time, the leakage holes 221 of the leakage outlet 220 are used to break up air bubbles in the gas-liquid mixture and reduce noise.

[0061] like Figure 1 As shown in the embodiment of this application, the two ends of the connecting pipe 300 are respectively connected to two partitions 500. The liquid inlet of the connecting pipe 300 is flush with the lower partition 500, and the liquid outlet of the connecting pipe 300 is flush with the upper partition 500.

[0062] Both ends of the connecting pipe 300 are flush with the end faces of the two partitions 500, eliminating the steps of the connecting pipe 300 in the first cavity 110 and the third cavity 130, thereby preventing the accumulation of air in the gas-liquid mixture at the pipe opening. At the same time, it facilitates the welding and assembly of the connecting pipe 300.

[0063] In some embodiments, a drain valve 600 is provided at the bottom of the main housing 100, and the drain valve 600 is connected to the first cavity 110 in an openable and closable manner.

[0064] Since the first chamber 110 directly receives the impact of the circulating water from the vacuum pump, impurities may be present in the circulating water. These impurities can easily accumulate in the first chamber 110, causing pipe blockage. When the drain valve 600 is opened, the circulating water from the vacuum pump enters the main housing 100 and is discharged through the drain valve 600, thereby flushing the first chamber 110 of the main housing 100. The draining process does not affect the operation of the vacuum pump, achieving cleaning without stopping the machine.

[0065] The drain valve 600 may be any valve that can perform the drain function in related technologies, and this application embodiment does not make an absolute limitation on this.

[0066] For example, the main enclosure 100 is covered with a noise reduction layer. This noise reduction layer can be made of sound insulation materials in related technologies, and the noise reduction layer can be directly bonded to the outside of the main enclosure. The noise reduction layer can further isolate noise inside the main enclosure 100.

[0067] In this embodiment, at least one of the main tank 100, connecting pipe 300, water outlet pipe 400, and water inlet pipe 200 is a metal component. Specifically, the main tank 100, connecting pipe 300, water outlet pipe 400, and water inlet pipe 200 are all made of 316 stainless steel, which enhances the structural strength while preventing corrosion from long-term water flow impact.

[0068] The noise reduction device for a vacuum pump according to this application embodiment has a first cavity 110, a second cavity 120, and a third cavity 130 arranged sequentially from bottom to top. During use, the circulating water discharged by the vacuum pump enters the main tank 100, filling the first cavity 110, the second cavity 120, and the third cavity 130 of the main tank 100 with water. Under the influence of gravity, the first cavity 110, the second cavity 120, and the third cavity 130 are all filled, and the water level rises to fill the entire main tank 100. After the main tank 100 is filled with water, the sound propagation in water is lower than that in air. Therefore, the noise of the water discharged by the vacuum pump can also be reduced.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 this application. 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.

[0070] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0071] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A sound reduction device for a vacuum pump, characterized in that, include: The main housing (100) is internally divided into a first cavity (110), a second cavity (120) and a third cavity (130) arranged sequentially from bottom to top. The first cavity (110) and the second cavity (120) are connected. A water inlet pipe (200) is inserted into the main housing (100) and extends from the third cavity (130) through the second cavity (120) to the first cavity (110). The water inlet pipe (200) has a liquid outlet (210) and a leakage part (220). The liquid outlet (210) is located in the first cavity (110) and communicates with the first cavity (110). The leakage part (220) is located in the second cavity (120) and communicates with the second cavity (120). The water inlet pipe (200) is used to connect to the circulating water outlet of the vacuum pump. A connecting pipe (300) connects the first cavity (110) and the third cavity (130). The water outlet pipe (400) is connected to the third chamber (130) and is used to guide the circulating water that enters the third chamber (130) through the first chamber (110) to be discharged from the main tank (100).

2. The noise reduction device for a vacuum pump according to claim 1, characterized by, The water inlet pipe (200) has a liquid inlet section (230) located outside the main tank (100), and the liquid outlet end (410) of the water outlet pipe (400) is located outside the main tank (100).

3. The noise reduction device for a vacuum pump according to claim 1, characterized by, The main housing (100) is provided with at least two partitions (500), each of which is connected to the water inlet pipe (200), the connecting pipe (300) and the water outlet pipe (400). The partitions (500) are used to divide the internal space of the main housing (100) to form the first cavity (110), the second cavity (120) and the third cavity (130).

4. The noise reduction apparatus for a vacuum pump according to claim 3, characterized by One of the partitions (500) has a gap (502) between it and the side wall of the main housing (100), and the gap (502) connects the first cavity (110) and the second cavity (120).

5. The noise reduction device for a vacuum pump according to claim 3, characterized by, The partition (500) between the first cavity (110) and the second cavity (120) is provided with a water seepage hole (501), which connects the first cavity (110) and the second cavity (120).

6. The noise reduction apparatus for a vacuum pump according to claim 3, wherein The two ends of the connecting pipe (300) are respectively connected to the two partitions (500), and the end of the connecting pipe (300) is flush with the partition (500) corresponding to the end of the connecting pipe (300).

7. The noise reduction apparatus for a vacuum pump according to any one of claims 1 to 6, characterized in that, The bottom of the main housing (100) is provided with a drain valve (600), which is connected to the first cavity (110) in an openable and closable manner.

8. The noise reduction device for a vacuum pump according to any one of claims 1 to 6, characterized in that, The leakage part (220) is a leakage hole (221) provided on the water inlet pipe (200). There are multiple leakage holes (221), and the multiple leakage holes (221) are evenly arranged at intervals on the water inlet pipe (200).

9. The noise reduction apparatus for a vacuum pump according to any one of claims 1 to 6, characterized by, The main housing (100) is wrapped with a noise reduction layer.

10. The noise reduction apparatus for a vacuum pump according to any one of claims 1 to 6, characterized by, At least one of the main box (100), the connecting pipe (300), the water outlet pipe (400) and the water inlet pipe (200) is a metal piece.

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