CN217926310U - Silencer of water ring vacuum pump - Google Patents
Silencer of water ring vacuum pump Download PDFInfo
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- CN217926310U CN217926310U CN202220630445.8U CN202220630445U CN217926310U CN 217926310 U CN217926310 U CN 217926310U CN 202220630445 U CN202220630445 U CN 202220630445U CN 217926310 U CN217926310 U CN 217926310U
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- vacuum pump
- water ring
- ring vacuum
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Abstract
The utility model relates to a silencer of a water ring vacuum pump, which is arranged at the downstream of the water ring vacuum pump and comprises a first insert pipe, wherein the first end of the first insert pipe is communicated with the outlet of the water ring vacuum pump; an expansion chamber in communication with the second end of the first insertion tube, the expansion chamber having a cross-sectional area greater than a cross-sectional area of the first insertion tube; a second insertion tube having a first end in communication with the expansion chamber and a cross-sectional area smaller than the cross-sectional area of the expansion chamber. The water ring vacuum pump is simple in design, high in practicability and capable of greatly reducing noise generated during operation of the water ring vacuum pump.
Description
Technical Field
The utility model relates to a silencer technical field especially relates to a silencer of water ring vacuum pump.
Background
The vacuum pump refers to a device or apparatus for obtaining vacuum by evacuating a container to be evacuated by using a mechanical, physical, chemical or physicochemical method. The method is widely applied to industries such as power plants, chemical industry, pharmacy, mines, papermaking, food, beer, building materials, plastics, metallurgy and the like.
When the water ring vacuum pump works, a large amount of noise is generated to pollute the site and the surrounding environment, and the normal production and life of the plant area and the surrounding people are seriously influenced. The main sources of noise are: 1) An impeller. When the impeller rotates at high speed, noise caused by air pulse vibration caused by applying pulse pushing on air and vibration noise generated by self stress of the pump impeller are generated. 2) Air flow noise. When the vacuum pump operates, the internal high-speed airflow generates airflow vortex when flowing through the impeller, the sealing ring, the guide vane, the pump shell and the reducer section of the pump because of the existence of turbulent flow or the separation of flow layers, thereby causing noise. 3) The pipe resonates. Because of the mechanical vibrations of the vacuum pump during operation, or the above-mentioned sources of noise, which excite the pipe, the pipe vibrations, and hence the vibratory noise, are exacerbated as it approaches its natural frequency.
In actual production, in order to reduce the noise influence of the water ring vacuum pump, a resistive muffler with a sound absorbing material is generally arranged at an inlet and an outlet of the water ring vacuum pump to reduce noise and shock. However, since the water is carried in the exhaust port of the water ring vacuum pump, the sound absorption effect of the sound absorption material in the conventional resistive muffler is greatly reduced after the sound absorption material is wetted, the support plate of the sound absorption material is corroded after a long time, the sound absorption material is easily hardened and falls off, and the sound absorption effect is extremely poor.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing a silencer of vacuum pump through the combination of inserted tube and expansion chamber, realizes the noise elimination shock attenuation.
The utility model discloses a realize through following technical scheme:
a silencer of a water ring vacuum pump is arranged at the downstream of the water ring vacuum pump and comprises a first insertion pipe, a second insertion pipe and a third insertion pipe, wherein the first insertion pipe is communicated with an outlet of the water ring vacuum pump; an expansion chamber in communication with the second end of the first insertion tube, the expansion chamber having a cross-sectional area greater than a cross-sectional area of the first insertion tube; a second insertion tube having a first end in communication with the expansion chamber and a cross-sectional area smaller than the cross-sectional area of the expansion chamber.
Compared with the prior art, the utility model discloses a silencer of water ring vacuum pump has different cross-sectional area's insert tube and expansion chamber through the combination, carries out the selectivity to the noise that produces in the water ring vacuum pump working process and filters, reduces the intensity of noise effectively, simultaneously, has overcome the sound absorbing material among the current hindering nature silencer and has met the poor defect of noise elimination effect behind the water.
Further, the length of the extension chamber in the noise propagation direction is an odd multiple of 1/4 wavelength of the peak noise frequency of the noise to be eliminated.
Further, the expansion chamber comprises a first end face, a second end face and a side wall located between the first end face and the second end face, the first end face, the second end face and the side wall enclose a cavity, and a first jack and a second jack are respectively arranged on the first end face and the second end face; the second end of the first insertion tube is connected with the expansion chamber through the first insertion hole of the expansion chamber; the first end of the second insertion tube is connected with the expansion chamber through a second insertion hole of the expansion chamber, and the second insertion tube is parallel to the first insertion tube.
Further, the first insertion pipe is perpendicular to the first end face and extends into the cavity of the expansion chamber, and the length of the first insertion pipe extending into the expansion chamber is 1/2 of the length of the expansion chamber; the first end of the second insertion pipe is perpendicular to the second end face and extends into the cavity of the expansion chamber, and the length of the second insertion pipe extending into the expansion chamber is 1/4 of the length of the expansion chamber; or the length of the first insertion tube extending into the expansion chamber is 1/4 of the length of the expansion chamber, and the length of the second insertion tube extending into the expansion chamber is 1/2 of the length of the expansion chamber.
Further, the expansion chamber has a cylindrical shape, and the first end surface and the second end surface thereof have a circular shape having the same area.
Further, the muffler of the water ring vacuum pump comprises more than two first insertion pipes, the expansion chamber and the second insertion pipe, and further comprises an inlet pipe and an inlet connecting pipe which are arranged between the water ring vacuum pump and the first insertion pipes, wherein the inlet pipe is communicated with an outlet of the water ring vacuum pump, the inlet connecting pipe is communicated with the inlet pipe, and each first insertion pipe is arranged at the downstream of the inlet connecting pipe in parallel and is communicated with the inlet connecting pipe; and the outlet connecting pipe is arranged at the downstream of each second inserting pipe and is parallel to the inlet connecting pipe, each second inserting pipe is arranged in parallel and is communicated with the outlet connecting pipe, and the outlet connecting pipe is provided with an exhaust outlet.
Further, the first end of the inlet pipe is communicated with the outlet of the water ring vacuum pump; the two ends of the inlet connecting pipe are of closed structures, the side wall of the inlet connecting pipe is communicated with the second end of the inlet pipe, and the inlet connecting pipe is perpendicular to the inlet pipe; the first end of each first insertion pipe is communicated with the side wall of the inlet connecting pipe, which is back to the inlet pipe, and the first insertion pipes are parallel; the first end of each second insertion pipe is fixedly connected with the side wall of the outlet connecting pipe, and each second insertion pipe is parallel to the first insertion pipe; the two ends of the outlet connecting pipe are of a closed structure, and the exhaust outlet is formed in the side wall back to the second inserting pipe.
Further, the sum of the cross-sectional areas of the first insertion pipes is greater than or equal to the cross-sectional area of the inlet pipe, and the sum of the cross-sectional areas of the second insertion pipes is greater than or equal to the cross-sectional area of the outlet connection pipe, so as to ensure exhaust.
Further, the central axis distance of the inlet connecting pipe and the outlet connecting pipe is 5 times of the wavelength of 1/4 of the peak noise frequency of the noise to be eliminated.
Further, the cross-sectional area of the inlet connecting pipe and the cross-sectional area of the outlet connecting pipe are 1.1 to 1.3 times of the cross-sectional area of the inlet pipe.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic top view of a muffler of a water ring vacuum pump according to embodiment 1 of the present invention;
fig. 2 is a schematic sectional structure view of a muffler of a water ring vacuum pump according to embodiment 1 of the present invention;
fig. 3 is a schematic top view of a muffler of a water ring vacuum pump according to embodiment 2 of the present invention;
fig. 4 is a schematic sectional structure view of a muffler of a water ring vacuum pump according to embodiment 2 of the present invention;
reference numerals: 1-water ring vacuum pump, 2-silencer, 20-first insert pipe, 21-inlet pipe, 22-expansion chamber, 221-first end face, 222-second end face, 223-side wall, 24-second insert pipe, 26-inlet connecting pipe, 28-outlet connecting pipe and 3-outlet pipe.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The utility model discloses a silencer of water ring vacuum pump is a reactive muffler, and according to noise and vibration control principle, the typical single section expansion chamber noise elimination volume is as follows with the relation equality of the length of expansion chamber in the reactive muffler:
m-the expansion ratio or the expansion ratio,
s 1 is the cross-sectional area of the first insertion tube, s 2 Is the cross-sectional area of the expansion chamber;
the number of k-wave is the same as the wave number,
l-length of expansion chamber (m);
Δ L-mute volume (dB).
From the above equation, the amount of sound deadening is the maximum when the length of the extension chamber is an odd multiple of the 1/4 wavelength of the noise, and Δ L is larger as the value of m is larger, and therefore, the influence of m and L on Δ L is most critical.
Further analyzing the above equation, the expansion chamber muffler has selective filtering of noise, i.e. it cannot filter noise in some frequency bands (called pass frequency), so it is also critical to select a proper value of l according to the field noise spectrum subsection. To overcome the selectivity of a single expansion chamber to noise, and to increase the frequency range of the noise coverage, the present application uses an insertion tube to increase the noise frequency coverage. The length of the insertion pipe is 1/2 of the length of the expansion chamber so as to eliminate noise with odd times of 1/2 wavelength, and the length of the insertion pipe at the other end is 1/4 of the length of the expansion chamber so as to eliminate noise with even times of 1/2 wavelength and further improve the noise elimination effect of the water ring vacuum pump.
The structure of the muffler of the water ring vacuum pump of the present invention is further described below by two embodiments.
Example 1
Referring to fig. 1 and 2, it can be seen that the silencer of the water ring vacuum pump of the present embodiment is disposed downstream of the water ring vacuum pump 1, and the silencer 3 of the water ring vacuum pump includes a first insert pipe 20, an expansion chamber 22 and a second insert pipe 24. The first end of the first insert tube 20 is communicated with the outlet of the water ring vacuum pump 1, the second end is communicated with the expansion chamber 22, and the first end of the second insert tube 24 is communicated with the expansion chamber 22. Wherein the cross-sectional area of the first insertion tube 20 is the same as the cross-sectional area of the second insertion tube 24 and is smaller than the cross-sectional area of the expansion chamber 22.
Specifically, the expansion chamber 22 includes a first end surface 221, a second end surface 222, and a side wall 223 between the first end surface 221 and the second end surface 222, and the first end surface 221, the second end surface 222, and the side wall 223 enclose a cavity. The length of the extension chamber 32 (i.e., the distance between the first end surface 221 and the second end surface 222) is 3 times the peak noise frequency 1/4 wavelength of the noise to be eliminated. In the present embodiment, the wavelength of the noise to be eliminated is 1000mm, i.e., the length of the expansion chamber 32 is 750mm and the expansion ratio is 20 (i.e., the ratio of the cross-sectional area of the expansion chamber 22 to the cross-sectional area of the first insertion tube 20). The first end surface 221 and the second end surface 222 are respectively provided with a first insertion hole (not shown) and a second insertion hole (not shown), wherein the position of the first insertion hole (not shown) and the position of the second insertion hole (not shown) may be opposite or staggered, and in this embodiment, the position of the first insertion hole (not shown) and the position of the second insertion hole (not shown) are opposite.
The second end of the first insertion tube 20 passes through the first insertion hole (not shown) such that the first insertion tube 20 is perpendicular to the first end surface 221 and extends into the cavity of the expansion chamber 22. Preferably, the first insertion tube 20 extends into the expansion chamber 22 a length of 1/2 of the length of the expansion chamber 22 to eliminate noise at odd multiples of 1/2 wavelength. The first end of the second insertion tube 24 passes through the second insertion hole (not shown) such that the second insertion tube 24 is perpendicular to the second end face 222 and extends into the cavity of the expansion chamber 22. Preferably, the second insertion tube extends into the expansion chamber by 1/4 of the length of the expansion chamber to eliminate noise at even multiples of 1/2 wavelength. In addition, the length of the first insertion tube 20 extending into the expansion chamber 22 may be 1/4 of the length of the expansion chamber 22, and the length of the second insertion tube extending into the expansion chamber may be 1/2 of the length of the expansion chamber, which can also be implemented to eliminate the noise of odd multiples of 1/2 wavelength and the noise of even multiples of 1/2 wavelength.
The noise generated by the water ring vacuum pump 1 passes through the first cannula 20, the expansion chamber 22, and the second insertion tube 24 in order, and is discharged from the second insertion tube 24.
The utility model provides a silencer passes through pipeline cross sectional area's sudden change, makes sound multiple reflection in the cavity of expansion room 22 form the standing wave for can't direct conduction corresponding the frequency channel noise, convert the heat energy dissipation into at the cavity of expansion room 22, carry out the selectivity to the noise of process and filter with this, reduce the intensity of noise, thereby realize falling the absorbing effect of making an uproar.
The first end surface 221 and the second end surface 222 of the expansion chamber 22 may be circular, square, triangular, or polygonal, but in the present embodiment, the first end surface 221 and the second end surface 222 of the expansion chamber 22 are circular with the same area, that is, the expansion chamber 22 is cylindrical. Since the axial direction of the cylindrical expansion chamber 22 coincides with the conduction direction of the sound wave, it is advantageous to form a stable standing wave and also to facilitate the manufacture and installation.
In addition, the length of the expansion chamber 22 may be determined based on the frequency of the noise to be removed, with the peak frequency of the noise being selected as the target frequency when the device is operating at its rated operating conditions. The length of the expansion chamber can be calculated according to a formula, namely the length of the expansion chamber is an odd number multiple of 1/4 of the target frequency wavelength, and the noise reduction effect is the best at the moment, and the length can be determined according to the field arrangement condition. Since the present process is performed at a medium-low frequency and at a long wavelength, the length of the extension chamber 22 is set to 3/4 of the peak frequency wavelength of the noise to be eliminated (i.e., 3 times the peak frequency wavelength 1/4 of the noise to be eliminated) in the present embodiment.
The larger the expansion ratio of the muffler is, the better the sound-deadening effect is, but the expansion chamber of the muffler cannot be increased without limitation due to the field conditions under which the muffler is used and the manufacturing cost, and therefore, it is necessary to select an appropriate expansion ratio to achieve a noise reduction effect of 20dB or more, and the expansion ratio of the muffler of the present embodiment is 20, depending on the actual field installation conditions and the requirements of the target sound-deadening effect.
Example 2
Referring to fig. 3 and 4, fig. 3 is a schematic top view of a muffler of a water ring vacuum pump according to embodiment 2 of the present invention, and fig. 4 is a schematic cross-sectional view of the muffler of the water ring vacuum pump according to embodiment 2 of the present invention. This example differs from example 1 in that: the muffler of the water ring vacuum pump of the present embodiment includes four first insert pipes 2020, four expansion chambers 22, and four second insert pipes 24. Further, an inlet tube 21 and an inlet connection tube 26 are included, as well as an outlet connection tube 28. An inlet pipe 21 and an inlet connection pipe 26 are provided between the water ring vacuum pump 1 and the first insertion pipe 20; an outlet connecting tube 28 is arranged downstream of each second insertion tube 24 and parallel to the inlet connecting tube 26. The inlet tube 21, wherein the structures of the first insertion tube 20, the expansion chamber 22 and the second insertion tube 24 and the connection therebetween are the same as in embodiment 1.
Specifically, a first end of the inlet pipe 21 is fixedly connected with an output end of the water ring vacuum pump 1. The inlet connection pipe 26 has two closed ends, a side wall thereof is connected to the second end of the inlet pipe 21, and the inlet connection pipe 26 is perpendicular to the inlet pipe 21. The first end of each of the first insertion tubes 20 is communicated with the other directional sidewall of the inlet connection pipe 26 opposite to the inlet pipe 21, and each of the first insertion tubes 20 is parallel to the inlet pipe 21. The sum of the cross-sectional areas of the respective first insertion pipes 20 is greater than or equal to the cross-sectional area of the inlet pipe 21 to ensure smooth exhaust. The second end of each first insertion tube 20 passes through a first insertion hole (not shown) of an expansion chamber 22, so that each first insertion tube 20 is perpendicular to the first end surface of the expansion chamber 22 and extends into the cavity of the expansion chamber 22, the expansion chamber 22 is communicated with one first insertion tube 20, and each first insertion tube 20 is parallel to the inlet tube 21. Preferably, the first insertion tube 20 extends into the expansion chamber 22 by 1/2 of the length of the expansion chamber 22 to eliminate noise at odd multiples of 1/2 wavelength.
The first end of each second insertion tube 24 passes through a second insertion hole (not shown) of the expansion chamber 22, so that the second insertion tube 24 is perpendicular to the first end surface of the expansion chamber 22 and extends into the cavity of the expansion chamber 22, so that the second insertion tube 24 is communicated with the expansion chamber 22, and each second insertion tube 24 is parallel to the first insertion tube 20. Preferably, the second insertion tube 24 extends into the expansion chamber 22 a length that is 1/4 of the length of the expansion chamber 22 to eliminate noise at even multiples of 1/2 wavelength. The second end of each second insertion tube 24 is respectively communicated with the side wall of the outlet connecting tube 28, the two ends of the outlet connecting tube 28 are closed structures, and the side wall opposite to the second insertion tube 24 in the other direction is provided with an exhaust port (not shown), and the exhaust port (not shown) can be connected with the outlet tube 3 to guide the air flow and the filtered sound to other positions for exhaust. The sum of the cross-sectional areas of the outlet pipes 3 is smaller than or equal to the sum of the cross-sectional areas of the respective second insertion pipes 24 to ensure smooth exhaust.
Preferably, the center-to-center axial distance between the inlet connecting pipe 26 and the outlet connecting pipe 28 is 5 times of 1/4 wavelength, so that escaping noise sound waves form standing waves in the inlet and outlet connecting pipes, and the elimination of target noise is enhanced. Further, the cross-sectional area of the inlet connecting pipe 26 and the cross-sectional area of the outlet connecting pipe 28 are greater than the cross-sectional area of the inlet pipe 26, specifically 1.1 to 1.3 times of the cross-sectional area of the inlet pipe 26, so as to ensure smooth exhaust, and at the same time, the inlet connecting pipe 26 and the outlet connecting pipe 28 form a resonant cavity, and as the cavities of the inlet connecting pipe 26 and the outlet connecting pipe 28 are narrow and long, a certain selective noise elimination effect is achieved on medium-frequency and high-frequency noise. Because the noise frequency spectrum that produces under the different scenes is various, in order to eliminate the noise of different frequencies among the prior art, adopt the structure of the series connection of the expansion chamber of a plurality of different sizes more. However, since the noise spectrum of the water ring vacuum pump is single and only one peak noise exists, the expansion chamber with the same size is adopted in the embodiment.
In addition, because the expansion ratio of reactive muffler can not infinitely enlarge, consequently, for guaranteeing great expansion ratio, a plurality of expansion rooms in this embodiment silencer are parallelly connected setting, and the air current that produces the water ring vacuum pump distributes into the multichannel and propagates to reduce the diameter of each first stand-in pipe 20, also reduced expansion room 22's diameter, thereby ensure the utility model discloses a silencer has better noise elimination effect, is more convenient for simultaneously make and install.
Compared with the prior art, the utility model discloses a silencer of water ring vacuum pump has different cross-sectional areas's insert tube and expansion chamber through the combination to length according to injecing the expansion chamber is the odd number times of 1/4 wavelength of pending noise peak frequency, carries out the selectivity to the noise that produces in the water ring vacuum pump working process effectively and filters, reduces the intensity of noise effectively, simultaneously, has overcome the sound absorbing material among the current hindering nature silencer and has met the poor defect of noise cancelling effect behind the water. In addition, the expansion chambers are arranged in parallel, so that the size of the expansion chambers can be effectively reduced on the premise of ensuring the expansion ratio of the silencer, and the expansion chambers are convenient to manufacture and install.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, to those skilled in the art, changes and modifications may be made without departing from the spirit of the invention, and it is intended that the invention also encompass such changes and modifications.
Claims (9)
1. The utility model provides a silencer of water ring vacuum pump, sets up the low reaches at water ring vacuum pump which characterized in that: the method comprises the following steps:
the inlet pipe is communicated with an outlet of the water ring vacuum pump, and the inlet connecting pipe is communicated with the inlet pipe;
the first inserting pipes are arranged at the downstream of the inlet connecting pipe in parallel and are communicated with the inlet connecting pipe;
more than two expansion chambers, each expansion chamber being in communication with the second end of one of the insertion tubes and having a cross-sectional area greater than the cross-sectional area of the first insertion tube;
more than two second insertion tubes, wherein the first end of each second insertion tube is communicated with one expansion chamber, and the cross-sectional area of each second insertion tube is smaller than that of the expansion chamber;
and the outlet connecting pipe is arranged at the downstream of each second inserting pipe and is parallel to the inlet connecting pipe, each second inserting pipe is arranged in parallel and is communicated with the outlet connecting pipe, and the outlet connecting pipe is provided with an exhaust outlet.
2. The muffler of the water ring vacuum pump as set forth in claim 1, wherein:
the length of the expansion chamber along the noise propagation direction is odd times of the 1/4 wavelength of the peak noise frequency of the noise to be eliminated.
3. The muffler of the water ring vacuum pump as set forth in claim 2, wherein:
the expansion chamber comprises a first end face, a second end face and a side wall positioned between the first end face and the second end face, the first end face, the second end face and the side wall enclose a cavity, and a first jack and a second jack are respectively arranged on the first end face and the second end face;
the second end of the first insertion tube is connected with the expansion chamber through the first insertion hole of the expansion chamber;
the first end of the second insertion tube is connected to the expansion chamber through a second insertion hole of the expansion chamber, and the second insertion tube is parallel to the first insertion tube.
4. The muffler of the water ring vacuum pump as set forth in claim 3, wherein:
the first insertion pipe is perpendicular to the first end face and extends into the cavity of the expansion chamber, and the length of the first insertion pipe extending into the expansion chamber is 1/2 of the length of the expansion chamber; the first end of the second insertion pipe is perpendicular to the second end face and extends into the cavity of the expansion chamber, and the length of the second insertion pipe extending into the expansion chamber is 1/4 of the length of the expansion chamber;
or the length of the first insertion tube extending into the expansion chamber is 1/4 of the length of the expansion chamber, and the length of the second insertion tube extending into the expansion chamber is 1/2 of the length of the expansion chamber.
5. The muffler of the water ring vacuum pump as set forth in claim 4, wherein:
the expansion chamber is cylindrical, and the first end face and the second end face of the expansion chamber are circular with the same area.
6. The muffler of the water ring vacuum pump as recited in claim 1, wherein:
the first end of the inlet pipe is communicated with the outlet of the water ring vacuum pump;
the two ends of the inlet connecting pipe are of closed structures, the side wall of the inlet connecting pipe is communicated with the second end of the inlet pipe, and the inlet connecting pipe is perpendicular to the inlet pipe;
the first end of each first insertion pipe is communicated with the side wall of the inlet connecting pipe, which is back to the inlet pipe, and the first insertion pipes are parallel;
the first end of each second insertion pipe is communicated with the side wall of the outlet connecting pipe, and each second insertion pipe is parallel to the first insertion pipe;
the two ends of the outlet connecting pipe are of closed structures, and the outlet is arranged on the side wall back to the second inserting pipe.
7. The muffler of the water ring vacuum pump as set forth in claim 1, wherein:
the sum of the cross-sectional areas of the first insertion pipes is greater than or equal to the cross-sectional area of the inlet pipe, and the sum of the cross-sectional areas of the second insertion pipes is greater than or equal to the cross-sectional area of the outlet connecting pipe.
8. The muffler of the water ring vacuum pump as set forth in claim 1, wherein:
the central axle distance between the inlet connecting pipe and the outlet connecting pipe is 5 times of the wavelength of 1/4 of the peak noise frequency of the noise to be eliminated.
9. The muffler of the water ring vacuum pump as set forth in claim 1, wherein:
the cross-sectional area of the inlet connecting pipe and the cross-sectional area of the outlet connecting pipe are 1.1 to 1.3 times of the cross-sectional area of the inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220630445.8U CN217926310U (en) | 2022-03-22 | 2022-03-22 | Silencer of water ring vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220630445.8U CN217926310U (en) | 2022-03-22 | 2022-03-22 | Silencer of water ring vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217926310U true CN217926310U (en) | 2022-11-29 |
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ID=84146191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220630445.8U Active CN217926310U (en) | 2022-03-22 | 2022-03-22 | Silencer of water ring vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217926310U (en) |
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2022
- 2022-03-22 CN CN202220630445.8U patent/CN217926310U/en active Active
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Address after: 512100 Wushi Town, Qujiang District, Shaoguan City, Guangdong Province Patentee after: Guangdong Shaoguan Yuejiang Electricity Generation Co.,Ltd. Address before: 512100 Wushi Town, Qujiang District, Shaoguan City, Guangdong Province Patentee before: GUANGDONG SHAOGUAN YUEJIANG POWER GENERATION CO.,LTD. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230831 Address after: 512100 Wushi Town, Qujiang District, Shaoguan City, Guangdong Province Patentee after: Guangdong Shaoguan Yuejiang Electricity Generation Co.,Ltd. Patentee after: Guangdong Yuejiang Hongrui Electric Power Technology Development Co.,Ltd. Address before: 512100 Wushi Town, Qujiang District, Shaoguan City, Guangdong Province Patentee before: Guangdong Shaoguan Yuejiang Electricity Generation Co.,Ltd. |
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