CN116393266B

CN116393266B - Low-noise flat scraper lower part unloading automatic centrifugal machine

Info

Publication number: CN116393266B
Application number: CN202310665214.XA
Authority: CN
Inventors: 胡振华; 夏金兰; 刘鑫彦
Original assignee: ZHANGJIAGANG ZHONGNAN CHEMICAL MACHINERY CO LTD
Current assignee: ZHANGJIAGANG ZHONGNAN CHEMICAL MACHINERY CO LTD
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-08-25
Anticipated expiration: 2043-06-07
Also published as: CN116393266A

Abstract

The invention relates to the technical field of centrifuges, in particular to a low-noise flat plate type scraper lower discharging automatic centrifuger, which comprises the following components: the material distribution module comprises a feeding unit for feeding materials into corresponding material distribution positions, a material distributor connected with the feeding unit and used for distributing the materials to the corresponding positions to be centrifuged, and a material distribution motor connected with the material distributor and used for providing running power for the material distributor; the separation module is partially arranged below the distribution module; the discharging module comprises a scraping component which is partially arranged at the inner side of the rotary drum and is used for scraping materials on the rotary drum after centrifugation, a discharging opening which is arranged below the rotary drum and a liquid outlet pipe which is connected with the discharging opening and is used for discharging liquid-phase materials; the central control module is used for adjusting the rotating speed of the driving motor to the rotating speed of the corresponding driving motor according to the drum material distribution time length of the single material distribution amount; the invention realizes the improvement of separation and unloading efficiency and separation accuracy.

Description

Low-noise flat scraper lower part unloading automatic centrifugal machine

Technical Field

The invention relates to the technical field of centrifuges, in particular to a low-noise automatic unloading centrifuge with a flat scraper.

Background

The discharge centrifuge is suitable for separating suspension containing solid phase with granularity greater than 0.015mm, and the discharge centrifuge in the prior art has the problem of high temperature in idle stage for separating and discharging efficiency and stability.

Chinese patent publication No.: CN102614998A discloses a flat scraper lower discharge centrifuge, comprising: a base; the shell is arranged at the upper part of the machine base, and an upper cover is arranged at the upper part of the shell; the main shaft assembly is arranged in the shell, the motor assembly is arranged on one side of the shell, and the main shaft assembly is in transmission connection with an output shaft of the motor assembly; the rotary drum is arranged in the shell and is in transmission connection with the main shaft assembly, the lower part of the rotary drum is provided with a discharge opening, and a liquid discharge channel is formed between the outer side of the rotary drum and the inner side of the shell; the control unit is electrically connected or in signal connection with the motor assembly; the scraper assembly comprises a scraper and a driving piece for driving the scraper, the scraper stretches into the rotary drum, and the driving piece is in signal connection with the control unit. It can be seen that the flat scraper down-discharge centrifuge has problems of reduced centrifuge operation efficiency and stability due to an increase in temperature.

Disclosure of Invention

Therefore, the invention provides a low-noise flat scraper lower discharging automatic centrifugal machine, which is used for solving the problems of the prior art that the operation efficiency and stability of the centrifugal machine are reduced due to the rise of temperature.

In order to achieve the above object, the present invention provides a low noise flat scraper lower discharge automatic centrifuge, comprising: the material distribution module comprises a feeding unit for feeding materials into corresponding material distribution positions, a material distributor connected with the feeding unit and used for distributing the materials to the corresponding positions to be centrifuged, and a material distribution motor connected with the material distributor and used for providing running power for the material distributor; the separation module is partially arranged below the material distribution module and comprises a rotary drum, a centrifugal rotating shaft and a driving motor, wherein the rotary drum is partially arranged below the material distribution device and used for separating materials, the centrifugal rotating shaft is partially arranged in the rotary drum and used for providing torque for rotating the rotary drum, and the driving motor is connected with the centrifugal rotating shaft and used for providing rotary power for the centrifugal rotating shaft; the discharging module is connected with the separating module and comprises a scraping component which is partially arranged at the inner side of the rotary drum and used for scraping materials on the rotary drum after centrifugation, a discharging opening which is arranged below the rotary drum and a liquid outlet pipe which is connected with the discharging opening and used for discharging liquid-phase materials; the central control module is respectively connected with the distribution module, the separation module and the discharge module, and is used for adjusting the rotating speed of the driving motor to be higher than the rotating speed of the corresponding driving motor according to the distribution time length of the rotary drum with single distribution amount, adjusting the thickness of the standard material to be corresponding to the thickness according to the residual material amount in the single distribution process detected by the weight sensor arranged in the distributor, adjusting the gap width of the scraper and the rotary drum to be corresponding to the gap width according to the discharge speed of the discharge opening, calculating the flow variance of the liquid phase material according to the flow of a plurality of liquid phase materials detected by the flow meters arranged on the outer wall of the rotary drum, and adjusting the rotating speed of the distribution motor to be corresponding to the rotating speed of the distribution motor according to the calculated flow variance of the liquid phase material.

Further, the central control module determines three types of judging modes of whether the temperature generated by the idle rotation of the rotary drum is within an allowable range or not according to the cloth duration of the rotary drum with single cloth quantity, wherein,

the first type of judgment mode is that the central control module judges that the temperature generated by the idling of the rotary drum is within an allowable range under the condition of presetting a first cloth duration;

the second type of judgment mode is that the central control module judges that the temperature generated by the idle rotation of the rotary drum exceeds an allowable range under the condition of presetting a second cloth duration, and adjusts the rotating speed of the driving motor to the rotating speed of the corresponding driving motor by calculating the difference value between the cloth duration of the rotary drum and the preset first cloth duration;

the third type of judgment mode is that the central control module preliminarily judges that the heated material volume exceeds the allowable range under the condition of presetting a third material distribution time length, detects the residual material quantity in the single material distribution process by controlling the weight sensor, and judges secondarily whether the heated material volume exceeds the allowable range according to the detected residual material quantity in the single material distribution process;

the preset first cloth duration condition is that the drum cloth duration is less than or equal to the preset first cloth duration; the condition of the preset second cloth duration is that the length of the drum cloth is longer than the preset first cloth duration and less than or equal to the preset second cloth duration; the condition of presetting the third cloth duration is that the length of the drum cloth is longer than the preset second cloth duration;

The preset first cloth duration is smaller than the preset second cloth duration.

Further, the central control module determines three types of adjustment modes aiming at the rotating speed of the driving motor according to the difference value between the drum material distribution time length and the preset first material distribution time length under the condition of the preset second material distribution time length,

the first type of rotation speed adjusting mode is that the central control module adjusts the rotation speed of the driving motor to the rotation speed of the preset driving motor under the condition of presetting a first cloth duration difference value;

the second type of rotation speed adjusting mode is that the central control module adjusts the rotation speed of the driving motor to a first rotation speed by using a preset first motor rotation speed adjusting coefficient under the condition of presetting a second cloth duration difference value;

the third type of rotation speed adjusting mode is that the central control module adjusts the rotation speed of the driving motor to a second rotation speed by using a preset second motor rotation speed adjusting coefficient under the condition of presetting a third cloth duration difference value;

the preset first cloth duration difference condition is that the difference value between the drum cloth duration and the preset first cloth duration is smaller than or equal to the preset first cloth duration difference value; the preset second cloth duration difference condition is that the difference between the drum cloth duration and the preset first cloth duration is larger than the preset first cloth duration difference and smaller than or equal to the preset second cloth duration difference; the preset third cloth duration difference condition is that the difference between the drum cloth duration and the preset first cloth duration is larger than the preset second cloth duration difference;

The preset first cloth duration difference value is smaller than the preset second cloth duration difference value.

Further, the central control module determines three secondary judging modes of whether the heated material volume exceeds an allowable range according to the residual material quantity in the single material distribution process detected by the weight sensor under the condition of presetting a third material distribution time length, wherein,

the first secondary volume judgment mode is that the central control module secondarily judges that the heated material volume is within an allowable range under the condition of presetting a first residual material quantity;

the second type of secondary volume judgment mode is that the central control module secondarily judges that the heated material volume exceeds an allowable range under the condition of presetting a second residual material amount, and the standard material thickness is adjusted to a corresponding thickness by calculating the difference value between the residual material amount in the single material distribution process and the preset first residual material amount;

the third type of secondary volume judgment mode is that the central control module judges that the distributing device has a blocking fault under the condition of presetting a third residual material quantity and sends out a fault checking and overhauling notification aiming at the distributing device;

the first preset material quantity condition is that the material quantity in a single material distribution process is smaller than or equal to the first preset material quantity; the condition of the preset second residual material quantity is that the residual material quantity in the single material distribution process is larger than the preset first residual material quantity and smaller than or equal to the preset second residual material quantity; the condition of the preset third residual material quantity is that the residual material quantity in the single material distribution process is larger than the preset second residual material quantity;

The preset first residual material quantity is smaller than the preset second residual material quantity.

Further, the central control module determines three types of adjustment modes aiming at the thickness of the standard material according to the difference value between the residual material quantity in the single material distribution process and the preset first residual material quantity under the condition of the preset second residual material quantity, wherein,

the first type of thickness adjustment mode is that the central control module adjusts the standard material thickness to a preset standard material thickness under the condition of presetting a first residual material quantity difference value;

the second type of thickness adjustment mode is that the central control module adjusts the thickness of the standard material to a first thickness by using a preset first thickness adjustment coefficient under the condition of presetting a second residual material quantity difference value;

the third type of thickness adjustment mode is that the central control module adjusts the thickness of the standard material to a second thickness by using a preset second thickness adjustment coefficient under the condition of presetting a third residual material quantity difference value;

the preset first residual material quantity difference condition is that the difference between the residual material quantity in the single material distribution process and the preset first residual material quantity is smaller than or equal to the preset first residual material quantity difference; the preset second residual material quantity difference condition is that the difference between the residual material quantity in the single material distribution process and the preset first residual material quantity is larger than the preset first residual material quantity difference and smaller than or equal to the preset second residual material quantity difference; the preset third residual material quantity difference condition is that the difference between the residual material quantity in the single material distribution process and the preset first residual material quantity is larger than the preset second residual material quantity difference;

The preset first residual material quantity difference value is smaller than the preset second residual material quantity difference value.

Further, the central control module determines whether the liquid phase material content of the filter cake on the rotary drum is within the allowable range according to the discharge speed of the discharge port when the rotation speed of the driving motor is regulated, wherein,

the first content judging mode is that the central control module judges that the scraper is at damage risk under the condition of presetting a first discharging speed and sends out damage inspection notification for the scraper;

the second type of content judging mode is that the central control module judges that the content of liquid phase materials of a filter cake is lower than an allowable range under the condition of presetting a second discharging speed, and the gap width between the scraper and the rotary drum is adjusted to be corresponding to the gap width by calculating the difference value between the discharging speed of the discharging opening and the preset first discharging speed;

the third type of content judging mode is that the central control module judges that the content of the liquid phase material of the filter cake is within an allowable range under the condition of presetting a third discharging speed;

the preset first discharging speed condition is that the discharging speed of the discharging port is smaller than or equal to the preset first discharging speed; the preset second discharging speed condition is that the discharging speed of the discharging port is larger than the preset first discharging speed and smaller than or equal to the preset second discharging speed; the preset third discharging speed condition is that the discharging speed of the discharging port is larger than the preset second discharging speed;

Wherein, the preset first discharging speed is smaller than the preset second discharging speed.

Further, the central control module determines three types of adjustment modes for the gap width between the scraper and the rotary drum according to the difference value between the discharge speed of the discharge opening and the preset first discharge speed under the condition of the preset second discharge speed,

the first type of width adjustment mode is that the central control module adjusts the gap width between the scraper and the rotary drum to a preset gap width under the condition of presetting a first discharging speed difference value;

the second type of width adjustment mode is that the central control module uses a preset second gap width adjustment coefficient to adjust the gap width between the scraper and the rotary drum to be reduced to a first gap width under the condition of a preset second discharging speed difference value;

the third type of width adjustment mode is that the central control module uses a preset first gap width adjustment coefficient to adjust the gap width between the scraper and the rotary drum to a second gap width under the condition of presetting a third discharging speed difference value;

the preset first discharging speed difference value condition is that the difference value between the discharging speed of the discharging port and the preset first discharging speed is smaller than or equal to the preset first discharging speed; the preset second discharging speed difference value is that the difference value between the discharging speed of the discharging port and the preset first discharging speed is larger than the preset first discharging speed difference value and smaller than or equal to the preset second discharging speed difference value; the preset third discharging speed difference value is that the difference value between the discharging speed of the discharging port and the preset first discharging speed is larger than the preset second discharging speed difference value;

The preset first discharging speed difference value is smaller than the preset second discharging speed difference value.

Further, the central control module determines three types of judging modes whether the uniformity of the distribution process is within an allowable range according to the variance of the flow rate of the liquid-phase material, wherein,

the first type of uniformity judging mode is that the central control module judges that the uniformity of the cloth process is within an allowable range under the condition of a preset first variance;

the second type of uniformity judging mode is that the central control module judges that the uniformity of the material distribution process is lower than an allowable range under the condition of a preset second variance, and adjusts the rotating speed of the material distribution motor to the rotating speed of the corresponding material distribution motor by calculating the difference value between the flow variance of the liquid phase material and the preset first variance;

the third type of uniformity judging mode is that the central control module judges that the rotating drum has faults under the condition of a preset third difference and sends out fault checking notification aiming at the rotating drum;

the preset first variance condition is that the variance of the flow rate of the liquid-phase material is smaller than or equal to the preset first variance; the preset second variance condition is that the variance of the flow rate of the liquid phase material is larger than the preset first variance and smaller than or equal to the preset second variance; the preset third variance condition is that the variance of the flow rate of the liquid phase material is larger than the preset second variance;

Wherein the preset first variance is smaller than the preset second variance.

Further, the central control module determines three types of adjustment modes aiming at the rotating speed of the cloth motor according to the difference value of the flow variance of the liquid phase material and the preset first variance under the preset second variance condition, wherein,

the first type of cloth motor rotating speed adjusting mode is that the central control module adjusts the cloth motor rotating speed to a preset cloth motor rotating speed under the condition of a preset first variance difference value;

the second type of cloth motor rotating speed adjusting mode is that the central control module adjusts the cloth motor rotating speed to the first cloth motor rotating speed by using a first cloth motor rotating speed adjusting coefficient under the condition of presetting a second variance difference value;

the third type of cloth motor rotating speed adjusting mode is that the central control module adjusts the cloth motor rotating speed to the second cloth motor rotating speed by using a second cloth motor rotating speed adjusting coefficient under the condition of presetting a third differential value;

wherein, the preset first cloth motor rotating speed regulating coefficient is smaller than the preset second cloth motor rotating speed regulating coefficient.

Further, the preset first variance condition is that the difference between the flow variance of the liquid phase material and the preset first variance is smaller than or equal to the preset first variance;

The preset second variance difference condition is that the difference between the flow variance of the liquid phase material and the preset first variance is larger than the preset first variance difference and smaller than or equal to the preset second variance difference; the preset third variance difference condition is that the difference between the flow variance of the liquid phase material and the preset first variance is larger than the preset second variance difference;

the preset first variance difference value is smaller than the preset second variance difference value.

Compared with the prior art, the centrifugal machine has the beneficial effects that through the distribution module, the separation module, the unloading module and the central control module, the rotating speed of the driving motor is regulated to be corresponding to the rotating speed of the driving motor through a plurality of preset characteristic parameters in the process of separating materials, and the influence of inaccurate control on the material separation speed due to the influence of the rising temperature of the idle rotating stage of the rotating drum on the viscosity of the materials on the rotating drum, which is reflected by overlong distribution time, is reduced; the thickness of the standard material is adjusted to be corresponding to the thickness according to the residual material quantity in the single material distribution process detected by a weight sensor arranged in the distributor, and the excessive residual material quantity in the single material distribution process reflects the influence on the volume expansion of the solid phase material after the temperature is increased, so that the adjustment of the thickness of the standard material reduces the efficiency of the volume expansion of the material in the material scraping process and the accuracy of the separation process; the gap width between the scraper and the rotary drum is adjusted to be corresponding to the gap width according to the discharging speed of the discharging opening, so that the influence on the scraping efficiency of the materials due to inaccurate adjustment of the gap width between the scraper and the rotary drum is reduced; through adjusting the rotating speed of the distributing motor to the rotating speed of the corresponding distributing motor according to the variance of the flow rate of the liquid-phase materials, the influence of non-uniform distribution on the stability of material separation is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is realized.

Further, according to the centrifuge, through the preset first material distribution time length and the preset second material distribution time length, whether the temperature generated by the idle rotation of the rotary drum is within the allowable range or not is determined according to the rotary drum material distribution time length of the single material distribution amount in the material separation process, the influence on the viscosity of the material caused by the temperature rise reflected by the rotary drum material distribution time length is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

Further, according to the centrifuge, by setting the preset first distribution time length difference value and the preset second distribution time length difference value, the rotating speed of the driving motor is adjusted to be corresponding to the rotating speed of the driving motor according to the difference value between the drum distribution time length and the preset first distribution time length, the influence of inaccurate control on the material separation speed due to the influence of the rising temperature of the drum idling stage reflected by overlong distribution time length on the viscosity of the material on the drum is reduced, and the improvement of separation discharging efficiency and separation accuracy is further realized.

Further, according to the centrifuge, through the preset first residual material quantity and the preset second residual material quantity, whether the heated material volume exceeds the allowable range or not is determined according to the residual material quantity in the single material distribution process detected by the weight sensor, the influence on scraping efficiency caused by inaccurate determination of the heated material volume is reduced, and the improvement on separation discharging efficiency and separation accuracy is further realized.

Furthermore, according to the centrifuge, through the preset first residual material quantity difference value and the preset second residual material quantity difference value, the standard material thickness is adjusted to the corresponding thickness according to the difference value between the residual material quantity in the single material distribution process and the preset first residual material quantity, and the excessive residual material quantity in the single material distribution process reflects the influence on the volume expansion of the solid-phase material after the temperature is increased, so that the adjustment of the standard material thickness reduces the efficiency of the volume expansion of the material in the material scraping process and the accuracy of the separation process, and further improves the separation discharging efficiency and the separation accuracy.

Further, according to the centrifuge, through the preset first discharging speed and the preset second discharging speed, whether the liquid-phase material content of the filter cake on the rotary drum is in an allowable range or not is determined according to the discharging speed of the discharging opening when the rotation speed of the driving motor is regulated, the discharging speed of the discharging opening reflects the liquid-phase material content of the filter cake on the rotary drum, the faster the discharging speed of the discharging opening is, the lower the liquid-phase material content is, and the improvement of the separation discharging efficiency and the separation accuracy is further realized.

Furthermore, according to the centrifugal machine, through the preset first discharging speed difference value and the preset second discharging speed difference value, three types of adjustment modes for the gap width of the scraper and the gap width of the rotary drum are determined according to the difference value between the discharging speed of the discharging opening and the preset first discharging speed, the influence on the scraping efficiency of materials due to inaccurate adjustment of the gap width of the scraper and the gap width of the rotary drum is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

Furthermore, according to the centrifugal machine, through the preset first variance and the preset second variance, whether the uniformity of the material distribution process is within the allowable range or not is determined according to the variance of flow data of the liquid-phase materials detected by the plurality of flow meters arranged on the outer wall of the rotary drum, the influence on the stability of the material separation process due to inaccurate determination of the uniformity of the material distribution process is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

Furthermore, the centrifugal machine provided by the invention has the advantages that the influence of non-uniform material distribution on the material separation stability is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized by setting the preset first variance difference value and the preset second variance difference value and determining three types of adjustment modes for the rotating speed of the material distribution motor according to the difference value between the flow variance of the liquid-phase material and the preset first variance.

Drawings

FIG. 1 is a schematic diagram of a low noise flat scraper lower discharge automatic centrifuge according to an embodiment of the present invention;

FIG. 2 is a block diagram of the overall structure of a low noise flat scraper lower discharge automatic centrifuge according to an embodiment of the present invention;

FIG. 3 is a block diagram of a separation module of a low noise flat scraper lower discharge automatic centrifuge according to an embodiment of the present invention;

fig. 4 is a block diagram of a connection structure of a separation module and a central control module of a low-noise flat scraper lower discharging automatic centrifugal machine according to an embodiment of the invention.

Detailed Description

In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1, fig. 2, fig. 3, and fig. 4, the schematic structural diagram, the overall structural block diagram, the separation module structural block diagram, and the connection structural block diagram of the separation module and the central control module of the low-noise flat scraper lower discharging automatic centrifuge according to the embodiment of the invention are respectively shown; the embodiment of an automatic centrifuge for discharging materials from the lower part of a low-noise flat scraper comprises:

the material distribution module comprises a feeding unit 5 for feeding materials to the corresponding material distribution position, a material distributor 4 connected with the feeding unit 5 and used for distributing the materials to the corresponding position to be centrifuged, and a material distribution motor 7 connected with the material distributor 4 and used for providing the running power of the material distributor 4;

The separation module is partially arranged below the distribution module and comprises a rotary drum 2 which is partially arranged below the distributor 4 and used for separating materials, a centrifugal rotating shaft 9 which is partially arranged in the rotary drum 2 and used for providing torque for rotating the rotary drum 2, and a driving motor 10 which is connected with the centrifugal rotating shaft 9 and used for providing rotary power for the centrifugal rotating shaft 9;

the discharging module is connected with the separating module and comprises a scraping assembly which is partially arranged at the inner side of the rotary drum 2 and used for scraping the materials on the rotary drum 2 after centrifugation, a discharging opening 12 which is arranged below the rotary drum 2 and a liquid outlet pipe 11 which is connected with the discharging opening 12 and used for discharging liquid-phase materials;

the central control module is respectively connected with the distribution module, the separation module and the discharge module, and is used for adjusting the rotating speed of the driving motor 10 to be higher than the rotating speed of the corresponding driving motor according to the drum distribution time length of single distribution, adjusting the thickness of the standard material to be corresponding to the thickness according to the residual material quantity of the single distribution process detected by the weight sensor 6 arranged inside the distributor 4, adjusting the gap width of the scraper 8 and the drum 2 to be corresponding to the gap width according to the discharge speed of the discharge opening 12, calculating the flow variance of the liquid phase material according to the flow of the liquid phase material detected by the plurality of flow meters 3 arranged on the outer wall of the drum, and adjusting the rotating speed of the distribution motor to be corresponding to the rotating speed of the distribution motor according to the calculated flow variance of the liquid phase material.

Specifically, the outer side of the rotary drum 2 is also provided with a shell 1; the scraping assembly comprises a scraper 8 which is arranged on the inner side of the rotary drum 2 and is used for scraping materials on the rotary drum 2, and a scraper power motor 13 which is connected with the scraper 8 and is used for providing power for the scraper 8 to carry out hanging action and for carrying out horizontal and vertical position movement of the scraper 8.

Specifically, as will be understood by those skilled in the art, the connection between the driving motor and the centrifugal shaft may be a conventional connection, and the connection between the distributing motor and the distributing device may also be a conventional motor connection.

Specifically, the collection mode of the discharge speed of the discharge opening is that a visual sensor (not shown in the figure) is used for detecting the discharge volume of the discharge opening and calculating the discharge speed of the discharge opening according to the detected volume of the discharge material, and the calculation formula of the discharge speed of the discharge opening is as follows:

，

wherein B is the discharge volume of the discharge port in the time t, and t is the discharge time.

According to the centrifugal machine, through the distribution module, the separation module, the discharging module and the central control module, the rotating speed of the driving motor 10 is increased to the rotating speed of the corresponding driving motor according to the drum distribution time length of single distribution amount in the process of separating materials, so that the influence of inaccurate control on the material separation speed due to the influence of the rising temperature of the idle stage of the drum 2 on the viscosity of the materials on the drum 2 reflected by overlong distribution time length is reduced; the thickness of the standard material is adjusted to the corresponding thickness according to the residual material amount of the single material distribution process detected by the weight sensor 6 arranged in the distributor 4, and the excessive residual material amount of the single material distribution process reflects the influence on the volume expansion of the solid phase material after the temperature is increased, so that the adjustment of the thickness of the standard material reduces the efficiency of the volume expansion of the material on the material scraping process and the accuracy of the separation process; by adjusting the gap widths of the scraper 8 and the rotary drum 2 to the corresponding gap widths according to the discharging speed of the discharging opening 12, the influence on the material scraping efficiency due to inaccurate adjustment of the gap widths of the scraper 8 and the rotary drum 2 is reduced; through adjusting the rotating speed of the distributing motor to the rotating speed of the corresponding distributing motor according to the variance of the flow rate of the liquid-phase materials, the influence of non-uniform distribution on the stability of material separation is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is realized.

With continued reference to fig. 1, the central control module determines whether the temperature generated by the idle rotation of the drum 2 is within the allowable range according to the drum distribution duration of the single distribution amount, wherein,

the first type of judgment mode is that the central control module judges that the temperature generated by the idling of the rotary drum 2 is within an allowable range under the condition of presetting a first cloth duration;

the second type of judgment mode is that the central control module judges that the temperature generated by the idle rotation of the rotary drum 2 exceeds an allowable range under the condition of presetting a second cloth duration, and adjusts the rotation speed of the driving motor to the rotation speed of the corresponding driving motor by calculating the difference value between the cloth duration of the rotary drum and the preset first cloth duration;

the third type of judgment mode is that the central control module preliminarily judges that the heated material volume exceeds the allowable range under the condition of presetting a third material distribution time length, detects the residual material quantity in the single material distribution process by controlling the weight sensor 6, and judges secondarily whether the heated material volume exceeds the allowable range according to the detected residual material quantity in the single material distribution process;

Specifically, the drum cloth duration of the single cloth amount is denoted as T, the preset first cloth duration is denoted as T1, the preset second cloth duration is denoted as T2, wherein T1 is smaller than T2, the difference between the drum cloth duration and the preset first cloth duration is denoted as Δt, and Δt=t-T1 is set.

Further, according to the centrifuge, through the preset first material distribution duration and the preset second material distribution duration, whether the temperature generated by the idle rotation of the rotary drum 2 is within the allowable range or not is determined according to the rotary drum material distribution duration of the single material distribution amount in the material separation process, the influence on the viscosity of the material caused by the temperature rise reflected by the rotary drum material distribution duration is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

With continued reference to fig. 1 and 2, the central control module determines three types of adjustment modes for the rotation speed of the driving motor according to the difference between the drum material distribution duration and the preset first material distribution duration under the preset second material distribution duration condition, wherein,

the first type of rotation speed adjustment mode is that the central control module adjusts the rotation speed of the driving motor 10 to the rotation speed of a preset driving motor under the condition of presetting a first cloth duration difference value;

The second type of rotation speed adjusting mode is that the central control module uses a preset first motor rotation speed adjusting coefficient to adjust the rotation speed of the driving motor 10 to a first rotation speed under the condition of presetting a second cloth duration difference value;

the third type of rotation speed adjusting mode is that the central control module uses a preset second motor rotation speed adjusting coefficient to adjust the rotation speed of the driving motor 10 to a second rotation speed under the condition of presetting a third cloth duration difference value;

Specifically, the preset first cloth duration difference is denoted as Δt1, the preset second cloth duration difference is denoted as Δt2, the preset first motor rotation speed adjustment coefficient is denoted as α1, the preset second motor rotation speed adjustment coefficient is denoted as α2, the preset driving motor rotation speed is denoted as V0, Δt1 < [ Δt2 ], 1 < α1 < α2, the adjusted driving motor rotation speed is denoted as V ', V' =v0×αi is set, wherein αi is the preset i-th motor rotation speed adjustment coefficient, and i=1, 2 is set.

Further, according to the centrifuge, by setting the preset first material distribution duration difference value and the preset second material distribution duration difference value, and adjusting the rotating speed of the driving motor 10 to the rotating speed of the corresponding driving motor according to the difference value between the drum material distribution duration and the preset first material distribution duration, the influence of inaccurate control on the material separation speed due to the influence of the rising temperature of the idle stage of the drum 2 reflected by the overlong material distribution duration on the viscosity of the material on the drum 2 is reduced, and the improvement of separation discharging efficiency and separation accuracy is further realized.

With continued reference to fig. 1 and 2, the central control module determines whether the heated material volume exceeds the allowable range according to the remaining material amount in the single material distribution process detected by the weight sensor 6 under the condition of presetting a third material distribution time period, wherein,

The third type of secondary volume judgment mode is that the central control module judges that the distributing device 4 has a blocking fault and sends out a fault checking and overhauling notification aiming at the distributing device 4 under the condition of presetting a third residual material quantity;

Specifically, the residual material amount in the single material distribution process is denoted as Q, the preset first residual material amount is denoted as Q1, the preset second residual material amount is denoted as Q2, wherein Q1 is smaller than Q2, the difference between the residual material amount in the single material distribution process and the preset first residual material amount is denoted as Δq, and Δq=q-Q1 is set.

Further, according to the centrifuge, through the preset first residual material quantity and the preset second residual material quantity, whether the heated material volume exceeds the allowable range or not is determined according to the residual material quantity in the single material distribution process detected by the weight sensor 6, the influence on scraping efficiency caused by inaccurate determination of the heated material volume is reduced, and the improvement on separation discharging efficiency and separation accuracy is further realized.

With continued reference to fig. 1 and 2, the central control module determines three types of adjustment modes for the thickness of the standard material according to the difference between the amount of the remaining material in the single material distribution process and the amount of the remaining material in the preset first material distribution process under the condition of the preset second material amount, wherein,

Specifically, the preset standard material thickness is denoted as R0, the preset first residual material amount difference is denoted as Δq1, the preset second residual material amount difference is denoted as Δq2, the preset first thickness adjustment coefficient is denoted as β1, the preset second thickness adjustment coefficient is denoted as β2, wherein Δq1 < Δq2,1 < β1 < β2, the adjusted standard material thickness is denoted as R ', R' =r0× (1+βj)/2 is set, βj is the preset j-th thickness adjustment coefficient, and j=1, 2 is set.

With continued reference to fig. 1 and 3, the central control module determines whether the liquid phase material content of the filter cake on the drum 2 is within the allowable range according to the discharge speed of the discharge port when the adjustment of the rotation speed of the driving motor is completed, wherein,

the first type of content judging mode is that the central control module judges that the scraper 8 is at damage risk under the condition of presetting a first discharging speed and sends out a damage inspection notice for the scraper 8;

the second type of content judging mode is that the central control module judges that the content of liquid phase materials of a filter cake is lower than an allowable range under the condition of presetting a second discharging speed, and the gap width between the scraper 8 and the rotary drum 2 is adjusted to be corresponding to the gap width by calculating the difference value between the discharging speed of the discharging opening and the preset first discharging speed;

Specifically, the discharge speed of the discharge port is denoted as S, the preset first discharge speed is denoted as S1, the preset second discharge speed is denoted as S2, S1 < S2 is set, the difference between the discharge speed of the discharge port and the preset first discharge speed is denoted as Δs, and Δs=s-S1 is set.

Further, according to the centrifuge, through the preset first discharging speed and the preset second discharging speed, when the rotation speed of the driving motor is regulated, whether the liquid-phase material content of the filter cake on the rotary drum 2 is in an allowable range or not is determined according to the discharging speed of the discharging opening 12, the discharging speed of the discharging opening 12 reflects the liquid-phase material content of the filter cake on the rotary drum 2, the faster the discharging speed of the discharging opening 12 is, the lower the liquid-phase material content is, and the improvement of the separation discharging efficiency and the separation accuracy is further realized.

With continued reference to fig. 1, 2 and 4, the central control module determines three types of adjustment modes for the gap width between the scraper 8 and the drum 2 according to the difference between the discharge speed of the discharge port and the preset first discharge speed under the condition of the preset second discharge speed, wherein,

The first type of width adjustment mode is that the central control module adjusts the gap width between the scraper 8 and the rotary drum 2 to a preset gap width under the condition of presetting a first discharging speed difference value;

the second type of width adjustment mode is that the central control module uses a preset second gap width adjustment coefficient to adjust the gap width between the scraper 8 and the rotary drum 2 to be reduced to a first gap width under the condition of a preset second discharging speed difference value;

the third type of width adjustment mode is that the central control module uses a preset first gap width adjustment coefficient to adjust the gap width between the scraper 8 and the rotary drum 2 to a second gap width under the condition of presetting a third discharging speed difference value;

Specifically, the preset gap width is denoted as W0, the preset first discharge speed difference is denoted as Δs1, the preset second discharge speed difference is denoted as Δs2, the preset first gap width adjustment coefficient is denoted as γ1, the preset second gap width adjustment coefficient is denoted as γ2, wherein Δs1 < [ Δs2 ], 0 < γ1 < γ2 < 1, the gap width between the adjusted doctor blade 8 and the drum 2 is denoted as W ', W' =w0×γk is set, γk is set as the preset kth gap width adjustment coefficient, and k=1, 2 is set.

Furthermore, according to the centrifugal machine, through the preset first discharging speed difference value and the preset second discharging speed difference value, three types of adjustment modes for the gap widths of the scraper 8 and the rotary drum 2 are determined according to the difference value between the discharging speed of the discharging opening and the preset first discharging speed, the influence on the material scraping efficiency caused by inaccurate adjustment of the gap widths of the scraper 8 and the rotary drum 2 is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

With continued reference to fig. 1, the central control module determines whether the uniformity of the distribution process is within the allowable range according to the variance of the liquid phase material flow, wherein,

the third type of uniformity judging mode is that the central control module judges that the rotary drum has faults under the condition of a preset third difference and sends out fault checking notification aiming at the rotary drum 2;

wherein the preset first variance is smaller than the preset second variance.

Specifically, the variance of the liquid phase material flow reflects the uniformity of the liquid phase material flow at different vertical positions of the rotating drum, namely the uniformity of the material distribution process, and when the material distributor is at different vertical positions of the rotating drum, the uneven material distribution process can be caused by too small rotating speed setting of the material distribution motor.

Specifically, the variance of the liquid phase material flow is denoted as D, the preset first variance is denoted as D1, the preset second variance is denoted as D2, wherein D1 < D2, the difference between the variance of the liquid phase material flow and the preset first variance is denoted as Δd, and Δd=d-D1 is set.

Furthermore, according to the centrifugal machine, through the preset first variance and the preset second variance, whether the uniformity of the material distribution process is within the allowable range or not is determined according to the variance of the flow data of the liquid-phase materials detected by the plurality of flow meters 3 arranged on the outer wall of the rotary drum 2, the influence on the stability of the material separation process due to inaccurate determination of the uniformity of the material distribution process is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is further realized.

With continued reference to fig. 1, the central control module determines three types of adjustment modes for the rotation speed of the distribution motor according to the difference between the variance of the flow rate of the liquid phase material and the preset first variance under the condition of the preset second variance, wherein,

With continued reference to fig. 1 and fig. 2, the preset first variance condition is that a difference between the flow variance of the liquid phase material and the preset first variance is less than or equal to a preset first variance;

Specifically, the preset cloth motor rotation speed is denoted as C0, the preset first variance difference is denoted as Δd1, the preset second variance difference is denoted as Δd2, the preset first cloth motor rotation speed adjustment coefficient is denoted as δ1, the preset second cloth motor rotation speed adjustment coefficient is denoted as δ2, wherein Δd1 < [ Δd2 ], 1 < δ1 < δ2, the adjusted cloth motor rotation speed is denoted as C ', C' =c0× (1+2δg)/3 is set, δg is the preset g-th cloth motor rotation speed adjustment coefficient, and g=1, 2 is set.

Example 1

In this embodiment 1, the dye is separated by the automatic centrifuge for discharging the lower part of the low-noise flat-plate scraper, the central control module determines three types of adjustment modes for the rotation speed of the driving motor according to the difference between the drum material distribution time length and the preset first material distribution time length under the preset second material distribution time length condition, the preset first material distribution time length difference is denoted as Δt1, the preset second material distribution time length difference is denoted as Δt2, the preset first motor rotation speed adjustment coefficient is denoted as α1, the preset second motor rotation speed adjustment coefficient is denoted as α2, the preset driving motor rotation speed is denoted as V0, wherein Δt1=10s, Δt2=30s, α1=1.1, α2=1.2, v0=1000r/min,

In this embodiment, the central control module determines that Δt1 < Δt2 is less than or equal to Δt=20s, and adjusts the rotation speed of the driving motor to a first rotation speed using a preset first motor rotation speed adjustment coefficient α1, where V' =1000r/min×1.1=1100 r/min.

According to the centrifuge disclosed in embodiment 1, by setting the preset first material distribution duration difference value and the preset second material distribution duration difference value, the rotation speed of the driving motor is adjusted to be corresponding to the rotation speed of the driving motor according to the difference value between the drum material distribution duration and the preset first material distribution duration, the influence of inaccurate control on the dye separation speed due to the influence of the rising temperature of the drum idling stage reflected by the overlong material distribution duration on the viscosity of the material on the drum is reduced, and the improvement of separation discharging efficiency and separation accuracy is realized.

Example 2

In this embodiment 2, the central control module determines three types of adjustment modes for the rotation speed of the driving motor according to the difference between the drum material distribution time length and the preset first material distribution time length under the preset second material distribution time length condition, the preset first material distribution time length difference is denoted as Δt1, the preset second material distribution time length difference is denoted as Δt2, the preset first motor rotation speed adjustment coefficient is denoted as α1, the preset second motor rotation speed adjustment coefficient is denoted as α2, the preset driving motor rotation speed is denoted as V0, wherein Δt1=10s, Δt2=30s, α1=1.1, α2=1.2, v0=1000r/min,

In embodiment 2, Δt=32s is obtained, the central control module determines Δt > - Δt2 and adjusts the rotation speed of the driving motor to a second rotation speed V' =1000r/min×1.2=1200r/min using a preset second motor rotation speed adjustment coefficient α2.

According to the centrifuge disclosed in embodiment 2, the rotation speed of the driving motor is adjusted to be corresponding to the rotation speed of the driving motor according to the material distribution time length of the rotary drum by setting the preset first material distribution time length difference value and the preset second material distribution time length difference value, so that the influence on the material separation speed caused by inaccurate control on the viscosity of the material on the rotary drum is reduced, and the improvement on the separation discharging efficiency and the separation accuracy is realized.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.

The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low noise flat scraper lower discharge automatic centrifuge, comprising:

the material distribution module comprises a feeding unit for feeding materials into corresponding material distribution positions, a material distributor connected with the feeding unit and used for distributing the materials to the corresponding positions to be centrifuged, and a material distribution motor connected with the material distributor and used for providing running power for the material distributor;

the separation module is partially arranged below the material distribution module and comprises a rotary drum, a centrifugal rotating shaft and a driving motor, wherein the rotary drum is partially arranged below the material distribution device and used for separating materials, the centrifugal rotating shaft is partially arranged in the rotary drum and used for providing rotating torque of the rotary drum, and the driving motor is connected with the centrifugal rotating shaft and used for providing rotating power of the centrifugal rotating shaft;

the discharging module is connected with the separating module and comprises a scraping component which is partially arranged at the inner side of the rotary drum and used for scraping materials on the rotary drum after centrifugation, a discharging opening which is arranged below the rotary drum and a liquid outlet pipe which is connected with the discharging opening and used for discharging liquid-phase materials;

the central control module is respectively connected with the distribution module, the separation module and the discharge module, and is used for adjusting the rotating speed of the driving motor to be higher than the rotating speed of the corresponding driving motor according to the distribution time length of the rotary drum with single distribution amount, adjusting the thickness of the standard material to be corresponding to the thickness according to the residual material amount in the single distribution process detected by the weight sensor arranged in the distributor, adjusting the gap width of the scraper and the rotary drum to be corresponding to the gap width according to the discharge speed of the discharge opening, calculating the flow variance of the liquid phase material according to the flow of a plurality of liquid phase materials detected by the flow meters arranged on the outer wall of the rotary drum, and adjusting the rotating speed of the distribution motor to be corresponding to the rotating speed of the distribution motor according to the calculated flow variance of the liquid phase material;

The central control module determines three types of judging modes of whether the temperature generated by the idle rotation of the rotary drum is within an allowable range or not according to the cloth duration of the rotary drum with single cloth quantity, wherein,

The preset first cloth duration is smaller than the preset second cloth duration;

the central control module determines three types of adjustment modes aiming at the rotating speed of the driving motor according to the difference value between the drum material distribution time length and the preset first material distribution time length under the condition of the preset second material distribution time length,

2. The automatic lower discharge centrifuge of a low-noise flat-plate scraper according to claim 1, wherein the central control module determines whether the heated material volume exceeds the allowable range according to the remaining material amount of the single material distribution process detected by the weight sensor under the condition of presetting a third material distribution time length, wherein,

3. The automatic low-noise flat-plate scraper lower discharge centrifuge according to claim 2, wherein the central control module determines three types of adjustment modes for the thickness of the standard material according to the difference value between the residual material quantity of the single material distribution process and the preset first residual material quantity under the preset second residual material quantity condition,

4. The lower discharge automatic centrifuge of low noise flat plate scraper according to claim 3, wherein the central control module determines whether the liquid phase material content of the filter cake on the rotary drum is within the allowable range according to the discharge speed of the discharge port when the adjustment of the rotation speed of the driving motor is completed, wherein,

5. The low noise flat-plate scraper lower discharge automatic centrifuge according to claim 4, wherein the central control module determines three types of adjustment modes for the gap width between the scraper and the rotary drum according to the difference between the discharge speed of the discharge opening and the preset first discharge speed under the preset second discharge speed condition,

6. The automatic lower discharge centrifuge of low noise flat scraper of claim 5, wherein the central control module determines three types of decision modes of whether the uniformity of the distribution process is within an allowable range according to the variance of the flow rate of the liquid phase material, wherein,

Wherein the preset first variance is smaller than the preset second variance.

7. The automatic lower discharge centrifuge of a low noise flat scraper of claim 6, wherein the central control module determines three types of adjustment modes for the rotation speed of the distributing motor according to the difference between the flow variance of the liquid phase material and the preset first variance under the preset second variance condition,

8. The automatic low-noise flat-plate scraper lower discharge centrifuge according to claim 7, wherein the preset first variance difference condition is that a difference between the flow variance of the liquid-phase material and the preset first variance is less than or equal to a preset first variance difference;