CN111545363B - Cyclone dust collector exhaust pipe pressure loss compensation device and method - Google Patents
Cyclone dust collector exhaust pipe pressure loss compensation device and method Download PDFInfo
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- CN111545363B CN111545363B CN202010567279.7A CN202010567279A CN111545363B CN 111545363 B CN111545363 B CN 111545363B CN 202010567279 A CN202010567279 A CN 202010567279A CN 111545363 B CN111545363 B CN 111545363B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
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Abstract
The invention discloses a pressure loss compensation device and a pressure loss compensation method for an exhaust pipe of a cyclone dust collector, belonging to the technical field of pressure loss compensation and comprising a pipeline, an exhaust pipe and an outlet pipe which are connected with the cyclone dust collector, wherein the tail end of the pipeline is fixed with the lower end of the exhaust pipe through a flange, the top end of the exhaust pipe is connected with the outlet pipe, airflow flow sensors are respectively arranged on the inner walls of the pipeline and the outlet pipe, and a pressure loss compensation mechanism is arranged in the exhaust pipe; if the air pressure of the exhaust pipe is greater than that of the outlet pipe, and the difference value is positive, the negative compensation coefficient needs to be improved, the length of the diffuser is increased, and the limiting ring synchronously slides downwards until the air pressure difference value is zero; if the air pressure of the exhaust pipe is smaller than that of the outlet pipe, the limiting ring synchronously slides upwards, the stop is carried out until the air pressure difference value is zero by reducing the length of the diffuser and increasing the length of the nozzle part, and if the difference value between the air pressure of the exhaust pipe and the air pressure of the outlet pipe is zero, the motor does not work, so that the purpose of automatic compensation is fulfilled.
Description
Technical Field
The invention relates to the technical field of pressure loss compensation, in particular to a device and a method for compensating pressure loss of an exhaust pipe of a cyclone dust collector.
Background
The cyclone dust collector is internally provided with a lung type valve, high-pressure gas enters the lung type valve after flowing in from an inlet of the cyclone dust collector and then flows out from an outlet of the cyclone dust collector, the flow of the passing gas is adjusted, so that the gas pressure at the outlet of the cyclone dust collector is adjusted, and the electronic controller adjusts the flow and the pressure of the respiratory gas according to the set value of an oxygen pressure system and the measurement value of a gas pressure sensor at the outlet of the cyclone dust collector.
The exhaust pipe of the cyclone dust collector has inevitable volume efficiency loss and friction pair leakage loss due to the fact that the valve is under pressure, and volume efficiency loss and friction pair leakage instability are also caused when the load pressure is unstable, and therefore output flow is unstable. Due to the unpredictability of the load pressure, the structural design of a typical proportional control valve causes an unpredictable variation in the valve output flow due to the unpredictability of the load pressure, resulting in a proportional control valve that is difficult to control for pressure loss compensation.
Disclosure of Invention
The invention aims to provide a pressure loss compensation device and a pressure loss compensation method for an exhaust pipe of a cyclone dust collector, wherein the compensation coefficient is a negative structure and a positive structure, and the negative structure and the positive structure are restricted with each other to complete pressure loss compensation so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a pressure loss compensation device for an exhaust pipe of a cyclone dust collector comprises a pipeline, the exhaust pipe and an outlet pipe which are connected with the cyclone dust collector, wherein the tail end of the pipeline is fixed with the lower end of the exhaust pipe through a flange;
the pressure loss compensation mechanism comprises a limiting mechanism and a sliding mechanism, the limiting mechanism is sleeved at two ends of the exhaust inner pipe and enlarges the diameter of the exhaust inner pipe, the sliding mechanism is sleeved on the exhaust inner pipe and divides an inner cavity of the exhaust inner pipe into a diffusion part and a nozzle part, airflow detected by airflow flow sensors positioned at the upper position and the lower position is fed back to the sliding mechanism to drive the sliding mechanism to work, and the lengths of the diffusion part and the nozzle part are adjusted in the process of up-and-down movement of the sliding mechanism for pressure loss compensation;
the sliding mechanism comprises a left plate, a right plate, a limiting ring, a supporting rod and a motor, the left plate and the right plate are symmetrically arranged along the length direction of the exhaust pipe, the opposite surfaces of the left plate and the right plate are provided with channels, a sliding rod and a screw rod are respectively fixed in the channels of the left plate and the right plate, and one end of the screw rod extends to the outside of the right plate and is connected with the motor fixed on the exhaust pipe;
the two ends of the limiting ring are respectively connected with the two supporting rods, the port of one supporting rod is sleeved on the sliding rod, and the other supporting rod is meshed with the screw rod.
Furthermore, stop gear includes the lantern ring and the lower lantern ring, and the both ends mouth of pipe of exhaust inner tube is enlarged and is fixed on the both ends inner wall of blast pipe by last lantern ring and lower lantern ring.
Further, go up the lantern ring and the diameter of lower lantern ring is the same, along last processing the annular of holding upper lantern ring and lower lantern ring in the both ends mouth of pipe of blast pipe, go up the lantern ring and insert the annular with lower lantern ring to the inner tube of exhausting is supported in the annular by upper lantern ring and lower lantern ring, and the inner circle of upper lantern ring and lower lantern ring flushes with the blast pipe inner circle.
Furthermore, the exhaust inner pipe is made of high-elasticity rubber with elasticity and smooth inner wall, and the outer diameter of the exhaust inner pipe is the same as the inner diameter of the limiting ring.
The invention provides another technology, which comprises a method of a pressure loss compensation device of a cyclone dust collector exhaust pipe, and comprises the following steps:
s1: the airflow flow sensors positioned at the upper and lower positions respectively detect the air pressure flow entering the exhaust pipe and the outlet pipe, and calculate the air pressure difference of the exhaust pipe and the outlet pipe;
s2: if the air pressure of the exhaust pipe is greater than that of the outlet pipe, and the difference value is positive, the motor drives the screw rod to rotate, the left plate and the right plate move downwards along the sliding rod and the screw rod, the limiting ring synchronously slides downwards, and the exhaust pipe is stopped by increasing the length of the diffuser and reducing the length of the nozzle part until the air pressure difference value is zero;
s3: if the air pressure of the exhaust pipe is smaller than that of the outlet pipe, and the difference value is a negative number, the motor drives the screw rod to rotate, the left plate and the right plate move upwards along the sliding rod and the screw rod, the limiting ring synchronously slides upwards, and the exhaust pipe stops by reducing the length of the diffuser and increasing the length of the nozzle part until the air pressure difference value is zero;
s4: if the difference between the air pressure of the exhaust pipe and the air pressure of the outlet pipe is zero, the motor does not work.
Further, regarding the stopper rings in S2, S3, and S4, the inner wall of the exhaust inner pipe 6 is free from wrinkles and is kept in a smooth state all the time during the sliding process.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a cyclone dust collector exhaust pipe pressure loss compensation device and method, wherein the compensation coefficient of a diffuser is negative, the compensation coefficient of a nozzle part is positive, the length of the diffuser and the length of the nozzle part are changed, the increase of the length of the diffuser can reduce the length of the nozzle part, and the pressure loss compensation is completed through the mutual restriction between the diffuser and the nozzle part;
if the air pressure of the exhaust pipe is greater than that of the outlet pipe, and the difference value is positive, the negative compensation coefficient needs to be improved, the length of the diffuser is increased, and the limiting ring synchronously slides downwards until the air pressure difference value is zero;
if the air pressure of the exhaust pipe is smaller than that of the outlet pipe, the limiting ring synchronously slides upwards, and the limiting ring stops by reducing the length of the diffuser and increasing the length of the nozzle part until the air pressure difference value is zero;
if the difference value between the air pressure of the exhaust pipe and the air pressure of the outlet pipe is zero, the motor does not work, and the purpose of automatic compensation is achieved.
Drawings
FIG. 1 is a view showing the connection between a sliding mechanism and an exhaust inner pipe according to the present invention;
FIG. 2 is a perspective view of the sliding mechanism of the present invention;
FIG. 3 is a first state diagram of the pressure loss compensation mechanism of the present invention;
FIG. 4 is a second state diagram of the pressure loss compensating mechanism of the present invention;
FIG. 5 is a state diagram of a pressure loss compensating mechanism of the present invention;
fig. 6 is a flow chart of pressure loss compensation according to the present invention.
In the figure: 1. a pipeline; 2. an exhaust pipe; 21. a ring groove; 3. an outlet pipe; 4. an airflow flow sensor; 5. a pressure loss compensation mechanism; 51. a limiting mechanism; 511. an upper collar; 512. a lower collar; 52. a sliding mechanism; 521. a left panel; 522. a right plate; 523. a limiting ring; 524. a support bar; 525. a motor; 6. an exhaust inner pipe; 61. a diffuser; 62. a spout portion; 7. a channel; 8. a slide bar; 9. a screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a pressure loss compensation device for an exhaust pipe of a cyclone dust collector comprises a pipe 1 connected with the cyclone dust collector, an exhaust pipe 2 and an outlet pipe 3, wherein the tail end of the pipe 1 is fixed with the lower end of the exhaust pipe 2 through a flange, the top end of the exhaust pipe 2 is connected with the outlet pipe 3, the two ends of the pipe 1 and the outlet pipe 3 are connected through the exhaust pipe 2, airflow flow sensors 4 are respectively arranged on the inner walls of the pipe 1 and the outlet pipe 3, a pressure loss compensation mechanism 5 is arranged in the exhaust pipe 2, a limiting mechanism 51 comprises an upper sleeve ring 511 and a lower sleeve 512, pipe orifices at two ends of an exhaust inner pipe 6 are enlarged by the upper sleeve 511 and the lower sleeve 512 and are fixed on the inner walls at two ends of the exhaust pipe 2, the diameters of the upper sleeve 511 and the lower sleeve 512 are the same, annular grooves 21 for accommodating the upper sleeve 511 and the lower sleeve 512 are formed in the inner edges of the pipe orifices at two ends of the exhaust pipe 2, the upper sleeve 511 and the lower sleeve 512 are inserted into the annular grooves 21, the inner exhaust pipe 6 is supported in the ring groove 21 by the upper collar 511 and the lower collar 512, the inner rings of the upper collar 511 and the lower collar 512 are flush with the inner ring of the exhaust pipe 2, so that the upper and lower amounts of the inner exhaust pipe 6 can be fixed in the exhaust pipe 2 by the upper collar 511 and the lower collar 512, and the upper collar 511 and the lower collar 512 do not protrude, so that the flow direction of the air flow is not affected.
Referring to fig. 2, the pressure loss compensation mechanism 5 includes a limiting mechanism 51 and a sliding mechanism 52, the limiting mechanism 51 is sleeved at two ends of the exhaust inner pipe 6 and expands the diameter of the exhaust inner pipe 6, the exhaust inner pipe 6 is made of elastic rubber with smooth inner wall, the outer diameter of the exhaust inner pipe 6 is the same as the inner diameter of the limiting ring 523, the sliding mechanism 52 is sleeved at the exhaust inner pipe 6 and divides the inner cavity of the exhaust inner pipe 6 into a diffuser 61 and a nozzle part 62, the airflow detected by the airflow flow sensors 4 located at the upper and lower positions is fed back to the sliding mechanism 52 for driving, and the lengths of the diffuser 61 and the nozzle part 62 are adjusted for pressure loss compensation during the up-down movement of the sliding mechanism 52.
Referring to fig. 3-5, the sliding mechanism 52 includes a left plate 521, a right plate 522, a limiting ring 523, a supporting rod 524 and a motor 525, the left plate 521 and the right plate 522 are symmetrically disposed along the length direction of the exhaust pipe 2, a channel 7 is formed on the opposite surfaces of the left plate 521 and the right plate 522, a sliding rod 8 and a screw 9 are respectively fixed in the channel 7 of the left plate 521 and the right plate 522, one end of the screw 9 extends to the outside of the right plate 522 and is connected to the motor 525 fixed on the exhaust pipe 2, two ends of the limiting ring 523 are respectively connected to the two supporting rods 524, a port of one supporting rod 524 is sleeved on the sliding rod 8, the other supporting rod 524 is engaged with the screw 9, the supporting rod 524 is driven to ascend by the rotation of the screw 9, and the sliding rod 8 disposed on the other side is for reducing the friction force thereof, so that the limiting ring 523 can keep the horizontal movement and the ascending or descending of the exhaust inner pipe 6, thereby avoiding the wrinkles caused in the moving process, thereby affecting the friction in the tube and the correction coefficient.
According to the published conclusion, the invention proposes that the pressure loss compensation coefficient is positive and negative (namely, the coefficient of the diffuser 61 is positive and the compensation coefficient of the nozzle part 62 is negative) on the basis of the structure design of the pipeline 1, the length of the diffuser 61 and the length of the nozzle part 62 are changed, and the increase of the length of the diffuser 61 can cause the length of the nozzle part 62 to be reduced, by mutual restriction between the two, the pressure loss compensation is completed.
Referring to fig. 6, in order to better show the flow of exhaust pipe pressure loss compensation, the present embodiment provides a method for compensating the exhaust pipe pressure loss of a cyclone dust collector, which includes the following steps:
the method comprises the following steps: the airflow flow sensors 4 located at the upper and lower positions respectively detect the air pressure flow entering the exhaust pipe 2 and the outlet pipe 3, and calculate the air pressure difference between the exhaust pipe 2 and the outlet pipe 3;
step two: if the air pressure of the exhaust pipe 2 is greater than that of the outlet pipe 3, and the difference is positive, the motor 525 drives the screw rod 9 to rotate, the left plate 521 and the right plate 522 move downwards along the sliding rod 8 and the screw rod 9, the limiting ring 523 synchronously slides downwards, and the exhaust pipe stops by increasing the length of the diffuser 61 and reducing the length of the nozzle part 62 until the air pressure difference is zero;
step three: if the air pressure of the exhaust pipe 2 is smaller than that of the outlet pipe 3, and the difference is negative, the motor 525 drives the screw 9 to rotate, the left plate 521 and the right plate 522 move upwards along the sliding rod 8 and the screw 9, the limit ring 523 synchronously slides upwards, and the operation is stopped by reducing the length of the diffuser 61 and increasing the length of the nozzle part 62 until the air pressure difference is zero;
step four: if the difference between the air pressure of the exhaust pipe 2 and the air pressure of the outlet pipe 3 is zero, the motor 525 does not work, and the inner wall of the exhaust inner pipe 6 has no wrinkles and is always kept in a smooth state in the sliding process of the limiting ring 523.
The compensation coefficient of the diffuser 61 is negative, the compensation coefficient of the nozzle part 62 is positive, the length of the diffuser 61 and the length of the nozzle part 62 are changed, the increase of the length of the diffuser 61 can cause the length of the nozzle part 62 to be reduced, and the pressure loss compensation is completed through the mutual restriction between the diffuser 61 and the nozzle part 62;
if the air pressure of the exhaust pipe 2 is greater than that of the outlet pipe 3, and the difference is positive, the negative compensation coefficient needs to be increased, the length of the diffuser 61 is increased, and the limit ring 523 synchronously slides downwards until the air pressure difference is zero;
if the air pressure of the exhaust pipe 2 is smaller than that of the outlet pipe 3, the limit ring 523 synchronously slides upwards, and stops by reducing the length of the diffuser 61 and increasing the length of the nozzle part 62 until the air pressure difference value is zero;
if the difference between the air pressure of the exhaust pipe 2 and the air pressure of the outlet pipe 3 is zero, the motor 525 does not work, and the purpose of automatic compensation is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. A cyclone dust collector exhaust pipe pressure loss compensation device comprises a pipeline (1) connected with a cyclone dust collector, an exhaust pipe (2) and an outlet pipe (3), wherein the tail end of the pipeline (1) is fixed with the lower end of the exhaust pipe (2) through a flange, the top end of the exhaust pipe (2) is connected with the outlet pipe (3), and airflow flow sensors (4) are respectively arranged on the inner walls of the pipeline (1) and the outlet pipe (3), and the cyclone dust collector exhaust pipe pressure loss compensation device is characterized in that a pressure loss compensation mechanism (5) is arranged in the exhaust pipe (2);
the pressure loss compensation mechanism (5) comprises a limiting mechanism (51) and a sliding mechanism (52), the limiting mechanism (51) is sleeved at two ends of the exhaust inner pipe (6) and enlarges the diameter of the exhaust inner pipe (6), the sliding mechanism (52) is sleeved on the exhaust inner pipe (6) and divides an inner cavity of the exhaust inner pipe (6) into a diffusion part (61) and a nozzle part (62), airflow detected by the airflow flow sensors (4) positioned at the upper and lower positions is fed back to the sliding mechanism (52) to drive the sliding mechanism to work, and the lengths of the diffusion part (61) and the nozzle part (62) are adjusted in the process that the sliding mechanism (52) moves up and down for pressure loss compensation;
the sliding mechanism (52) comprises a left plate (521), a right plate (522), a limiting ring (523), a supporting rod (524) and a motor (525), the left plate (521) and the right plate (522) are symmetrically arranged along the length direction of the exhaust pipe (2), a channel (7) is formed in the opposite surfaces of the left plate (521) and the right plate (522), a sliding rod (8) and a screw rod (9) are respectively fixed in the channel (7) of the left plate (521) and the channel (7) of the right plate (522), and one end of the screw rod (9) extends to the outside of the right plate (522) and is connected with the motor (525) fixed on the exhaust pipe (2);
two ends of the limit ring (523) are respectively connected with the two support rods (524), the port of one support rod (524) is sleeved on the slide rod (8), and the other support rod (524) is meshed with the screw (9).
2. The exhaust duct pressure loss compensating apparatus of a cyclone dust collector as claimed in claim 1, wherein the limiting mechanism (51) comprises an upper collar (511) and a lower collar (512), and the openings at both ends of the exhaust inner tube (6) are enlarged by the upper collar (511) and the lower collar (512) and fixed to the inner walls at both ends of the exhaust duct (2).
3. The exhaust pipe pressure loss compensating device of a cyclone dust collector as claimed in claim 2, wherein the diameters of the upper collar (511) and the lower collar (512) are the same, the annular groove (21) for accommodating the upper collar (511) and the lower collar (512) is formed in the inner edges of the pipe mouths at both ends of the exhaust pipe (2), the upper collar (511) and the lower collar (512) are inserted into the annular groove (21), the exhaust inner pipe (6) is supported in the annular groove (21) by the upper collar (511) and the lower collar (512), and the inner rings of the upper collar (511) and the lower collar (512) are flush with the inner ring of the exhaust pipe (2).
4. The exhaust pipe pressure loss compensating apparatus of a cyclone collector as claimed in claim 1, wherein the exhaust inner pipe (6) is made of high elastic rubber having elasticity and a smooth inner wall, and an outer diameter of the exhaust inner pipe (6) is the same as an inner diameter of the retainer ring (523).
5. The method of compensating for pressure loss of a cyclone exhaust pipe according to any one of claims 1 to 4, comprising the steps of:
s1: the airflow flow sensors (4) positioned at the upper and lower positions respectively detect the air pressure flow entering the exhaust pipe (2) and the outlet pipe (3), and calculate the air pressure difference of the exhaust pipe (2) and the outlet pipe (3);
s2: if the air pressure of the exhaust pipe (2) is greater than that of the outlet pipe (3), and the difference value is a positive number, the motor (525) drives the screw rod (9) to rotate, the left plate (521) and the right plate (522) move downwards along the sliding rod (8) and the screw rod (9), the limiting ring (523) synchronously slides downwards, and the air pressure difference value is zero and stops by increasing the length of the diffuser part (61) and reducing the length of the nozzle part (62);
s3: if the air pressure of the exhaust pipe (2) is smaller than that of the outlet pipe (3), and the difference value is a negative number, the motor (525) drives the screw rod (9) to rotate, the left plate (521) and the right plate (522) move upwards along the sliding rod (8) and the screw rod (9), the limiting ring (523) synchronously slides upwards, and the air pressure difference value is zero and stops by reducing the length of the diffuser part (61) and increasing the length of the nozzle part (62);
s4: if the difference between the air pressure of the exhaust pipe (2) and the air pressure of the outlet pipe (3) is zero, the motor (525) does not work.
6. The method of compensating for pressure loss of an exhaust pipe of a cyclone collector in accordance with claim 5, wherein the inner wall of the exhaust inner pipe (6) is free from wrinkles and always kept in a smooth state during the sliding of the retainer ring (523) in S2, S3 and S4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567279.7A CN111545363B (en) | 2020-06-19 | 2020-06-19 | Cyclone dust collector exhaust pipe pressure loss compensation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567279.7A CN111545363B (en) | 2020-06-19 | 2020-06-19 | Cyclone dust collector exhaust pipe pressure loss compensation device and method |
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| Publication Number | Publication Date |
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| CN111545363A CN111545363A (en) | 2020-08-18 |
| CN111545363B true CN111545363B (en) | 2022-01-28 |
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| US1190051A (en) * | 1916-04-22 | 1916-07-04 | Frederick A Wegner | Dust-collector. |
| US3613887A (en) * | 1968-10-14 | 1971-10-19 | Nils Anders Lennart Wikdahl | Clyclone separator to be built in a casing or similar |
| CN205627513U (en) * | 2016-05-30 | 2016-10-12 | 河南工程学院 | Two -stage dust pelletizing system with flow measurement |
| CN106733245A (en) * | 2016-11-30 | 2017-05-31 | 南京航空航天大学 | Filter effect can adjust automatically cyclone separator and method |
| CN106944268A (en) * | 2017-03-21 | 2017-07-14 | 东北石油大学 | A kind of overflow pipe automatic diameter changing formula cyclone separation device |
| CN207563115U (en) * | 2017-10-14 | 2018-07-03 | 广州市国味油脂食品有限公司 | A kind of cyclone dust removal machine |
| CN110404696A (en) * | 2019-08-05 | 2019-11-05 | 威海市海王旋流器有限公司 | A kind of overflow adjustable hydrocyclone online |
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2020
- 2020-06-19 CN CN202010567279.7A patent/CN111545363B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1190051A (en) * | 1916-04-22 | 1916-07-04 | Frederick A Wegner | Dust-collector. |
| US3613887A (en) * | 1968-10-14 | 1971-10-19 | Nils Anders Lennart Wikdahl | Clyclone separator to be built in a casing or similar |
| US3613887B1 (en) * | 1968-10-14 | 1988-08-30 | ||
| CN205627513U (en) * | 2016-05-30 | 2016-10-12 | 河南工程学院 | Two -stage dust pelletizing system with flow measurement |
| CN106733245A (en) * | 2016-11-30 | 2017-05-31 | 南京航空航天大学 | Filter effect can adjust automatically cyclone separator and method |
| CN106944268A (en) * | 2017-03-21 | 2017-07-14 | 东北石油大学 | A kind of overflow pipe automatic diameter changing formula cyclone separation device |
| CN207563115U (en) * | 2017-10-14 | 2018-07-03 | 广州市国味油脂食品有限公司 | A kind of cyclone dust removal machine |
| CN110404696A (en) * | 2019-08-05 | 2019-11-05 | 威海市海王旋流器有限公司 | A kind of overflow adjustable hydrocyclone online |
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| CN111545363A (en) | 2020-08-18 |
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