CN116351581A - A high-efficiency horizontal spiral discharge filter centrifuge - Google Patents

Abstract

The invention relates to the technical field of centrifuges, in particular to a high-efficiency horizontal spiral discharging filtering type centrifuger which comprises a rotary drum, a material conveying spiral, a concentric double-shaft mechanism, a feeding mechanism, a discharging mechanism and a control panel, wherein the rotary drum and the material conveying spiral are respectively connected with the concentric double-shaft mechanism, the concentric double-shaft mechanism comprises a first concentric shaft, a second concentric shaft, a first variable frequency motor, a second variable frequency motor and a key phase sensor, the feeding mechanism comprises a feeding pipeline, a material pushing spiral, a third variable frequency motor and a rotating speed sensor, and the discharging mechanism comprises a discharging channel and a conveying belt. The invention further determines the corresponding adjusting method of each component in the centrifugal process by comparing the actual water content of the solid phase with the preset water content, and can better control the water content of the solid phase and increase the intelligent degree of the centrifugal operation equipment.

Description

A high-efficiency horizontal spiral discharge filter centrifuge

technical field

The invention relates to the technical field of centrifuges, in particular to a high-efficiency horizontal spiral discharge filter centrifuge.

Background technique

Horizontal screw discharge filter centrifuge is widely used in chemical industry, petroleum, food, pharmaceutical, environmental protection, papermaking and mining and other fields. The horizontal screw discharge filter centrifuge drives the drum and the concentrically installed conveying screw through the motor. Rotating at a high speed in the same direction at a certain differential speed, the material is continuously input from the feed port and evenly distributed on the filter screen wall at the bottom of the drum, and the liquid phase is discharged through the filter screen and the filter holes on the drum wall under the action of centrifugal force. Drum, discharged through the liquid discharge port, the solid phase is trapped in the drum to form a filter cake, and the filter cake continuously flows from the small end of the drum to the large drum under the action of the conical surface component of centrifugal force and the thrust of the feeding screw. During this movement, due to the increase of the rotating diameter, the centrifugal force is rapidly increased, and the solid phase reaches the low moisture content solid phase from the high moisture content solid phase when it enters the drum initially, and then reaches the low moisture content solid phase when it is discharged from the drum. The trough discharges the low-moisture solid phase out of the machine, but because the existing horizontal screw discharge filter centrifuge is in production for a long time, it is easy for a certain amount of liquid to be thrown into the solid discharge pipe, and the material clogs the screen The problem of large water content in the solid phase caused by the inability to completely remove the liquid in the hole affects the production efficiency and economic benefits of the enterprise. Therefore, there is an urgent need for a horizontal machine that can reduce the water content of the solid phase and can realize self-test and self-adjustment. Spiral discharge filter centrifuge.

The Chinese Patent Publication No. CN104668109B discloses a filter aid feeder on a horizontal screw discharge filter centrifuge. Drum, the filter aid feeder is arranged on the feed end of the drum, the filter aid feeder includes a feed pipe inserted in the casing, a feed screw arranged on the discharge end of the feed pipe, The feeding screw includes a feeding spiral tube with an inner cavity, a rotating shaft inserted in the feeding spiral tube, a spiral blade fixed on the rotating shaft and distributed along its axial direction, and the front end of the feeding spiral tube is inserted in the rotating shaft In the inner cavity of the drum, the upper tube wall of the feeding spiral tube is provided with a material inlet that communicates with the inner cavity of the feeding tube. , the primary filter device includes a primary filter screen arranged under the rotating shaft, the filter feeder has a simple structure, greatly reduces the liquid content of the material entering the drum, and greatly improves the solid-liquid separation capacity of the drum; by It can be seen that the filter-aid feeder on the horizontal screw discharge filter centrifuge can only passively balance the average degree of feed particles per unit time during the feeding process, and cannot solve the problem caused by the clogging of the drum filter holes. The problem that the solid phase has a large water content and can realize self-testing.

Contents of the invention

Therefore, the present invention provides a high-efficiency horizontal screw discharge filter centrifuge to overcome the problem in the prior art that the water content of the solid phase cannot be self-tested and self-adjusted.

In order to achieve the above object, the present invention provides a high-efficiency horizontal screw discharge filter centrifuge, including a drum, a feeding screw, a concentric biaxial mechanism, a feeding mechanism, a discharging mechanism and a control panel, wherein,

The drum is connected with the concentric double-shaft mechanism, and the drum is set inside the centrifuge shell to carry the screen and use the centrifugal force to separate the solid from the liquid;

The conveying screw is connected with the concentric double-shaft mechanism, and the conveying screw is set inside the drum to scrape the solid phase matter that is close to the screen by the centrifugal force to the discharge port;

The concentric double-shaft mechanism is connected with the drum and the conveying screw respectively, and is used to transmit power to the drum and the conveying screw respectively;

The feeding mechanism includes a feeding pipe, a pushing screw, a third frequency conversion motor and a speed sensor. The feeding pipe is set above the drum, and the pushing screw is set in the feeding pipe to push the material out of the feeding pipe. The third The frequency conversion motor is connected to the pusher screw to provide power to the pusher screw, and the speed sensor is arranged on one side of the pusher screw to detect the speed of the pusher screw;

The discharge mechanism is set under the drum, which includes a discharge channel and a conveyor belt. The discharge channel is set on the side of the centrifuge shell at the big end of the drum to provide a preset discharge direction for the solid phase, and the conveyor belt is set on the bottom. Below the material channel, it is used to transport the solid phase material discharged from the material channel to the preset position. The conveyor belt also includes several fans and camera detection units. Among them, the fans are respectively arranged on both sides of the conveyor belt to dry the solid phase material. The camera detection unit is set above the conveyor belt to use machine vision to analyze and identify the image acquired by the camera detection unit and determine the water content of the current solid phase;

The control panel includes a display screen and a central control unit. The display screen is used to display the rotation speed of the drum, feeding screw, pusher screw, conveyor belt and fan. According to the comparison results, the speed difference of the concentric double-shaft mechanism and the speed of the third variable-frequency motor are adjusted accordingly, and the second variable-frequency motor is adjusted according to the vibration amplitude and frequency of the concentric double-shaft mechanism;

The concentric double-shaft mechanism includes a first concentric shaft, a second concentric shaft, a first variable frequency motor, a second variable frequency motor and a key phase sensor, wherein the first concentric shaft is a hollow structure and is arranged outside the second concentric shaft, and the second The inner diameter of the first concentric shaft is tangent to the outer diameter of the second concentric shaft. The first concentric shaft is respectively connected to the drum and the first frequency conversion motor to transmit the torque of the first frequency conversion motor to the drum. The second concentric shaft is respectively connected to the feeding screw. and the second frequency conversion motor, used to transmit the torque of the second frequency conversion motor to the conveying screw, and the key phase sensor is arranged on one side of the concentric double shaft to detect the vibration amplitude, vibration frequency and rotational speed of the concentric double shaft.

Specifically, the concentric twin shafts include a first concentric shaft and a second concentric shaft.

Specifically, the key phase sensor includes a vibration probe and two key phase probes, the vibration probe is used to detect the relative vibration of the concentric two shafts, and the key phase probe is used to detect the rotational speeds of the first concentric shaft and the second concentric shaft respectively.

The camera detection unit includes a camera, a memory and a processing chip. The camera is used to collect images at preset time intervals on the materials on the conveyor belt. The memory is used to store the image control group. The image control group includes multi-angle images of solid phase objects with different water contents. , the processing chip is used to judge the current water content of the solid phase according to the comparison results between the image collected by the camera and the matching control example in the image control group.

During the image acquisition of the materials on the conveyor belt by the camera detection unit at a preset time interval, the preset time interval is 1 second. The corresponding water content, and according to the average value of the water content of the 5 images, the current water content of the solid phase is obtained.

The central control unit judges whether the current moisture content of the solid phase satisfies the requirement of the preset moisture content according to the comparison result of the current solid moisture content MC0 and the preset moisture content MC on the conveyor belt, wherein MC includes the first preset moisture content MC1 and the second preset moisture content. 2. Preset water content MC2, MC1<MC2,

When MC0<MC1, the central control unit determines that the current water content of the solid phase meets the preset water content requirements;

When MC1≤MC0≤MC2, the central control unit determines that the current water content of the solid phase meets the preset water content requirements;

When MC0>MC2, the central control unit determines that the current water content of the solid phase does not meet the preset water content requirement.

The central control unit judges whether the current speed of the first variable frequency motor can be increased according to the comparison result between the current speed CSP1 of the first variable frequency motor and the maximum speed MSP1 of the first variable frequency motor, wherein,

When CSP1<MSP1, the central control unit determines that the current speed of the first variable frequency motor has not reached the maximum speed, and the current speed of the first variable frequency motor can be increased;

When CSP1=MSP1, the central control unit determines that the current speed of the first variable frequency motor has reached the maximum speed, and the current speed of the first variable frequency motor cannot be increased.

The central control unit determines whether the current speed difference needs to be adjusted according to the comparison result of the current speed difference CSD between the current speed CSP1 of the first variable frequency motor and the current speed CSP2 of the second variable frequency motor CSP2 and the preset critical speed difference PSD, and according to CSP1 and MSP1 According to the comparison results, determine whether the first variable frequency motor, the second variable frequency motor, the third variable frequency motor, the conveyor belt and the fan need to be adjusted, where, CSD=CSP1-CSP2, and CSD>0,

When CSD=PSD, the central control unit determines that the current speed difference is equal to the preset critical speed difference, and no longer increases the current speed difference;

If MC0<MC1 at this time, and the current speed of the first variable-frequency motor can be increased, the central control unit controls each of the variable-frequency motors to increase the current speed, maintain the current speed difference, control the conveyor belt to increase the current transmission speed of solids, and control the fan stop turning;

If MC0<MC1 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls the third variable frequency motor to increase the current speed and maintain the current speed difference, controls the conveyor belt to increase the current transmission speed of solids, and controls the fan to stop turn;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor can be increased, the central control unit controls the frequency conversion motors to increase the current speed, maintain the current speed difference, control the conveyor belt to increase the current transmission speed of the solid phase, and Control fan rotation;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls each of the variable frequency motors to maintain the current speed and the current speed difference, and controls the conveyor belt to maintain the current transmission speed of the solid phase, and Control the fan to stop rotating;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor can be increased, the central control unit controls the first variable frequency motor to increase the current speed, and maintains the current speed difference, controls the conveyor belt to increase the current transmission speed of solids, and controls the fan to increase Rotating speed;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls the third variable frequency motor to reduce the current speed, reduce the material handling capacity, and control the conveyor belt to reduce the current transmission speed of solids, and control the fan to increase the speed , until the current water content of the solid phase meets the preset water content requirements;

When CSD<PSD, the central control unit determines that the current speed difference is lower than the preset critical speed difference, and the current speed difference can be adjusted;

If MC0<MC1 at this time, and the current speed of the first variable-frequency motor can be increased, the central control unit controls each of the variable-frequency motors to increase the current speed, and increases the current speed of the first variable-frequency motor to CSP1=MSP1, and CSD=PSD, to control the conveyor belt Increase the current transmission speed of the solid phase, and control the fan to stop rotating;

If MC0 < MC1 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current speed to CSD=PSD, and controls the conveyor belt to increase the current transmission speed of solids, and controls the fan to stop rotating ;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor can be increased, the central control unit controls each of the frequency conversion motors to increase the current speed, and increases the current speed of the first variable frequency motor to CSP1=MSP1, and CSD=PSD, Control the third frequency conversion motor to increase the current speed, control the conveyor belt to increase the current transmission speed of solids, and control the rotation of the fan;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current speed to CSD=PSD, controls the third variable frequency motor to increase the current speed, and controls the conveyor belt to increase the solid phase The current conveying speed of the object, and control the rotation of the fan;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor can be increased, the central control unit controls the first variable frequency motor to increase the current speed, and controls the second variable frequency motor to reduce the current speed to CSD=PSD, and controls the conveyor belt to increase the solid phase The current transmission speed, and control the fan to increase the speed;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current speed to CSD=PSD, controls the conveyor belt to reduce the current transmission speed of solids, and controls the fan to increase the speed.

The central control unit judges whether the current speed of the third variable frequency motor can be reduced according to the comparison result between the current speed CSP3 of the third frequency conversion motor and the preset minimum speed LSP3 of the third frequency conversion motor, wherein,

When CSP3>LSP3, the central control unit determines that the current speed of the third variable frequency motor is greater than the minimum speed, and the current speed of the third variable frequency motor can be reduced;

When CSP3=LSP3, the central control unit determines that the current speed of the third variable frequency motor has reached the minimum speed, and the current speed of the third variable frequency motor cannot be reduced.

The central control unit judges that the current speed of the first variable frequency motor cannot be increased, when CSD=PSD, and CSP3=LSP3, if MC0>MC2, the central control unit controls the conveyor belt to reduce the current transmission speed of the solid phase, controls the fan to increase the speed, and sends to the display screen Output an abnormal prompt and stop the centrifugation operation.

The central control unit makes corresponding adjustments to the second variable frequency motor according to the comparison results of the vibration amplitude CVA and vibration frequency CVF detected by the key phase sensor with the preset vibration amplitude PVA and preset vibration frequency PVF respectively, wherein,

When CVA≥PVA, the central control unit judges that the current concentric biaxial vibration amplitude exceeds the preset vibration amplitude standard. It may be due to the uneven distribution of solid phase matter in the screen. Discharge as soon as possible to maintain the dynamic balance of the drum;

When CVA<PVA, the central control unit determines that the current concentric biaxial vibration amplitude does not exceed the preset vibration amplitude standard, and there is no need to adjust the second variable frequency motor;

When CVF≥PVF, the central control unit judges that the current vibration frequency of the concentric dual-axis exceeds the preset vibration frequency standard. It may be due to the uneven distribution of solid phase matter in the screen. Discharge as soon as possible to maintain the dynamic balance of the drum;

When CVF<PVF, the central control unit determines that the current concentric biaxial vibration frequency does not exceed the preset vibration frequency standard, and there is no need to adjust the second frequency conversion motor.

Compared with the prior art, the beneficial effects of the present invention are: firstly, by canceling the differential gear mechanism inside the centrifuge, the centrifuge can reduce the requirement for internal sealing, thereby reducing equipment cost and improving economic benefits.

Furthermore, through the concentric double-shaft mechanism, the differential speed of the drum and the conveying screw can be better controlled and adjusted, and at the same time, the water content of the solid phase can be adjusted more accurately and intelligently, ensuring The water content of the solid phase is always within the preset range.

Second, through the equipped camera detection unit, machine vision can be used to analyze and compare the water content of the solid phase at the discharge port, and then obtain the water content of the solid phase in the material. At the same time, the method of taking the average through multiple image comparisons , can reduce the influence of invalid resolution in machine vision detection of water content, improve the effectiveness of detection, and then make corresponding adjustments to centrifugation.

Third, through the equipped key phase sensor, the vibration frequency and vibration amplitude of the concentric two-axis can be detected, and then when the dynamic balance is broken due to the uneven distribution of solids on the surface of the screen in the drum, it can be detected immediately Detect and make corresponding adjustments to reduce the deformation or/and damage to the concentric double shaft caused by the imbalance of the counterweight during the centrifugation process, increase the service life of the equipment, and improve production efficiency.

Fourth, through the pusher screw provided in the feeding pipeline, the impact of material settlement on the feeding channel and feeding operation can be reduced, and at the same time, the amount of feeding can be precisely controlled, so that all aspects of the centrifugal operation process can be controlled and controllable Tune.

Fifth, the solid-phase material can be transported to the preset location as soon as possible through the conveyor belt, and the fan on the conveyor belt can be air-dried after the water content of the solid-phase material exceeds the preset range, further expanding the centrifugal product of the material. rate and increase economic benefits.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the structural representation of the high-efficiency horizontal spiral unloading filtering centrifuge of the embodiment of the present invention;

In the drawings: drum 1, feeding screw 2, concentric double-shaft mechanism 3, feeding mechanism 4, first concentric shaft 5, second concentric shaft 6, first frequency conversion motor 7, second frequency conversion motor 8, key Phase sensor 9, feed pipe 10, push screw 11, third variable frequency motor 12, rotational speed sensor 13, feeding channel 14, conveyor belt 15, fan 16, camera detection unit 17.

Detailed ways

In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection 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 other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is only for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In addition, it should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be the internal communication of two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Please refer to Figure 1, which is a schematic structural view of a high-efficiency horizontal screw discharge filter centrifuge according to an embodiment of the present invention. This embodiment includes a drum 1, a feeding screw 2, a concentric biaxial mechanism 3, and a feeding mechanism 4. The discharge mechanism and the control panel, wherein,

The drum 1 is connected with the concentric double-shaft mechanism 3, and the drum 1 is set inside the centrifuge shell to carry the screen and use the centrifugal force to separate the solid from the liquid;

The feeding screw 2 is connected with the concentric double-shaft mechanism 3, and the feeding screw 2 is arranged inside the drum 1, and is used to scrape out the solid phase matter that is close to the screen by the centrifugal force to the discharge port;

The concentric double-shaft mechanism 3 is connected with the drum 1 and the feeding screw 2 respectively, and is used to transmit power to the drum 1 and the feeding screw 2 respectively;

Feeding mechanism 4 comprises feeding pipeline 10, material pushing screw 11, the 3rd variable frequency motor 12 and speed sensor 13, feeding pipeline 10 is arranged on the top of rotating drum 1, and pushing material screw 11 is arranged in feeding pipeline 10, in order to Push the material out of the feed pipe 10, the third variable frequency motor 12 is connected to the pusher screw 11 to provide power to the pusher screw 11, and the speed sensor 13 is arranged on one side of the pusher screw 11 to detect the speed of the pusher screw 11 ;

The discharge mechanism is arranged under the drum 1, which includes a discharge channel 14 and a conveyor belt 15. The discharge channel 14 is arranged on the side of the centrifuge shell at the big end of the drum 1 to provide preset discharge for solids. Direction, the conveyor belt 15 is arranged below the unloading channel 14, in order to transport the solid phase matter discharged from the unloading channel 14 to the preset position, the conveyor belt 15 also includes a number of fans 16 and camera detection units 17, wherein the fans 16 are respectively arranged on the conveyor belt The two sides of 15 are used to air-dry the solid phase, and the camera detection unit 17 is arranged above the conveyor belt 15 to analyze and identify the images acquired by the camera detection unit 17 by machine vision and determine the current water content of the solid phase;

The control panel includes a display screen and a central control unit. The display screen is used to display the rotating speed of the drum 1, the feeding screw 2, the pushing screw 11, the conveyor belt 15 and the fan 16. The speed difference of the concentric double-shaft mechanism 3 and the speed of the third frequency conversion motor 12 are adjusted correspondingly according to the comparison results of the preset water content, and the second frequency conversion motor 12 is adjusted according to the vibration amplitude and vibration frequency of the concentric double-shaft mechanism 3. The motor 8 is adjusted accordingly;

The concentric double-shaft mechanism 3 comprises a first concentric shaft 5, a second concentric shaft 6, a first frequency conversion motor 7, a second frequency conversion motor 8 and a key phase sensor 9, wherein the first concentric shaft 5 is a hollow structure and is arranged on Outside the second concentric shaft 6, the inner diameter of the first concentric shaft 5 is tangent to the outer diameter of the second concentric shaft 6, and the first concentric shaft 5 is respectively connected to the drum 1 and the first frequency conversion motor 7 to transmit the first concentric shaft to the drum 1. The torque of the frequency conversion motor 7, the second concentric shaft 6 is connected to the feeding screw 2 and the second frequency conversion motor 8 respectively, to transmit the torque of the second frequency conversion motor 8 to the feeding screw 2, and the key phase sensor 9 is arranged on the concentric two-axis One side of the machine is used to detect the vibration amplitude, vibration frequency and rotational speed of the concentric double shaft.

In this embodiment, the concentric twin shafts include a first concentric shaft 5 and a second concentric shaft 6 .

In the present embodiment, the key phase sensor 9 includes a vibration probe and two key phase probes, the vibration probe is used to detect the relative vibration of the concentric dual shafts, and the key phase probe is used to detect the first concentric shaft 5 and the second concentric shaft respectively 6 rpm.

The camera detection unit 17 includes a camera, a memory and a processing chip. The camera is used to collect images at preset time intervals on the materials on the conveyor belt 15. The memory is used to store the image control group. The image control group includes solid-phase objects with different water contents. Angle image, the processing chip is used to judge the current water content of the solid phase according to the comparison result between the image collected by the camera and the matching control example in the image control group.

During the image acquisition of the material on the conveyor belt 15 by the camera detection unit 17 at a preset time interval, the preset time interval is set to 1 second, and the camera detection unit 17 obtains a result corresponding to the comparison between the five images collected continuously and the image control group respectively. The water content corresponding to the 5 images, and according to the average value of the water content of the 5 images, the current water content of the solid phase is obtained.

The central control unit judges whether the current moisture content of the solid phase satisfies the requirement of the preset moisture content according to the comparison result of the current solid phase moisture content MC0 and the preset moisture content MC on the conveyor belt 15, wherein MC includes the first preset moisture content MC1 and The second preset water content MC2, MC1<MC2,

When MC0<MC1, the central control unit determines that the current water content of the solid phase meets the preset water content requirements;

When MC1≤MC0≤MC2, the central control unit determines that the current water content of the solid phase meets the preset water content requirements;

When MC0>MC2, the central control unit determines that the current water content of the solid phase does not meet the preset water content requirement.

The central control unit determines whether the current speed of the first variable frequency motor 7 can be increased according to the comparison result between the current speed CSP1 of the first variable frequency motor 7 and the maximum speed MSP1 of the first variable frequency motor 7, wherein,

When CSP1<MSP1, the central control unit determines that the current speed of the first variable frequency motor 7 has not reached the maximum speed, and the current speed of the first variable frequency motor 7 can be increased;

When CSP1=MSP1, the central control unit determines that the current speed of the first variable frequency motor 7 has reached the maximum speed, and the current speed of the first variable frequency motor 7 cannot be increased.

The central control unit determines whether the current speed difference needs to be adjusted according to the comparison result between the current speed difference CSD of the current speed CSP1 of the first variable frequency motor 7 and the current speed CSP2 of the second frequency conversion motor 8 and the preset critical speed difference PSD, and according to CSP1 Compared with MSP1, determine whether the first variable frequency motor 7, the second variable frequency motor 8, the third variable frequency motor 12, the conveyor belt 15 and the fan 16 need to be adjusted, where CSD=CSP1-CSP2, and CSD>0,

When CSD=PSD, the central control unit determines that the current speed difference is equal to the preset critical speed difference, and no longer increases the current speed difference;

If MC0<MC1 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls each of the variable frequency motors to increase the current speed, and maintains the current speed difference, controls the conveyor belt 15 to increase the current transmission speed of the solid phase, and Control fan 16 to stop rotating;

If MC0<MC1 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls the third variable frequency motor 12 to increase the current speed, and maintains the current speed difference, controls the conveyor belt 15 to increase the current transmission speed of the solid phase, and Control fan 16 to stop rotating;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls each of the variable frequency motors to increase the current speed and maintain the current speed difference, and controls the conveyor belt 15 to increase the current transmission speed of the solid phase , and control the rotation of the fan 16;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls each of the variable frequency motors to maintain the current speed and maintain the current speed difference, and controls the conveyor belt 15 to maintain the current transmission speed of the solid phase , and control the fan 16 to stop rotating;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls the first variable frequency motor 7 to increase the current speed, and maintains the current speed difference, controls the conveyor belt 15 to increase the current transmission speed of the solid phase, and Control the fan 16 to increase the rotating speed;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls the third variable frequency motor 12 to reduce the current speed, reduces the amount of material handled, and controls the conveyor belt 15 to reduce the current transmission speed of the solid phase. The fan 16 increases the rotating speed until the current water content of the solid phase meets the preset water content requirement;

When CSD<PSD, the central control unit determines that the current speed difference is lower than the preset critical speed difference, and the current speed difference can be adjusted;

If MC0<MC1 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls each of the variable frequency motors to increase the current speed, and increases the current speed of the first variable frequency motor 7 to CSP1=MSP1, and CSD=PSD, Control the conveyor belt 15 to increase the current transmission speed of the solid phase, and control the fan 16 to stop rotating;

If MC0<MC1 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls the second variable frequency motor 8 to reduce the current speed to CSD=PSD, and controls the conveyor belt 15 to increase the current transmission speed of the solid phase, and controls Fan 16 stops rotating;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls each of the frequency variable motors to increase the current speed, and increases the current speed of the first variable frequency motor 7 to CSP1=MSP1, and CSD= PSD, control the third frequency conversion motor 12 to increase the current speed, control the conveyor belt 15 to increase the current transmission speed of the solid phase, and control the rotation of the fan 16;

If MC1≤MC0≤MC2 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls the second variable frequency motor 8 to reduce the current speed to CSD=PSD, controls the third variable frequency motor 12 to increase the current speed, and controls the conveyor belt 15. Increase the current transmission speed of the solid phase, and control the rotation of the fan 16;

If MC0>MC2 at this time, and the current speed of the first variable frequency motor 7 can be increased, the central control unit controls the first variable frequency motor 7 to increase the current speed, and controls the second variable frequency motor 8 to reduce the current speed to CSD=PSD, and controls the conveyor belt 15 Increase the current delivery speed of the solid phase, and control the fan 16 to increase the rotating speed;

If MC0 > MC2 at this time, and the current speed of the first variable frequency motor 7 cannot be increased, the central control unit controls the second variable frequency motor 8 to reduce the current speed to CSD=PSD, controls the conveyor belt 15 to reduce the current transmission speed of solids, and controls the fan 16 Increase the speed.

The central control unit judges whether the current speed of the third variable frequency motor 12 can be reduced according to the comparison result between the current speed CSP3 of the third frequency conversion motor 12 and the preset minimum speed LSP3 of the third frequency conversion motor 12, wherein,

When CSP3>LSP3, the central control unit determines that the current speed of the third variable frequency motor 12 is greater than the minimum speed, and the current speed of the third variable frequency motor 12 can be reduced;

When CSP3=LSP3, the central control unit determines that the current speed of the third variable frequency motor 12 has reached the minimum speed, and the current speed of the third variable frequency motor 12 cannot be reduced.

The central control unit determines that the current speed of the first variable frequency motor 7 cannot be increased, CSD=PSD, and CSP3=LSP3, if MC0>MC2, the central control unit controls the conveyor belt 15 to reduce the current transmission speed of the solid phase, and controls the fan 16 to increase the speed, An abnormal prompt is output to the display screen, and the centrifugation operation is stopped.

The central control unit makes corresponding adjustments to the second variable frequency motor 8 according to the comparison results of the vibration amplitude CVA and vibration frequency CVF detected by the key phase sensor 9 and the preset vibration amplitude PVA and preset vibration frequency PVF respectively, wherein,

When CVA≥PVA, the central control unit judges that the current concentric biaxial vibration amplitude exceeds the preset vibration amplitude standard. It may be due to the uneven distribution of solid phase matter in the screen. The material is discharged as soon as possible to maintain the dynamic balance of the drum 1;

When CVA<PVA, the central control unit determines that the current concentric biaxial vibration amplitude does not exceed the preset vibration amplitude standard, and there is no need to adjust the second frequency conversion motor 8;

When CVF≥PVF, the central control unit judges that the current vibration frequency of the concentric two-axis exceeds the preset vibration frequency standard. It may be due to the uneven distribution of the solid phase of the screen. The material is discharged as soon as possible to maintain the dynamic balance of the drum 1;

When CVF<PVF, the central control unit determines that the current concentric biaxial vibration frequency does not exceed the preset vibration frequency standard, and there is no need to adjust the second frequency conversion motor 8 .

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to related technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention; for those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A high-efficiency horizontal spiral discharging filter type centrifugal machine is characterized by comprising a rotary drum, a material conveying spiral, a concentric double-shaft mechanism, a feeding mechanism, a discharging mechanism and a control panel, wherein,

the rotary drum is connected with the concentric double-shaft mechanism, is arranged inside the shell of the centrifugal machine and is used for bearing a screen and carrying out solid-liquid separation operation on materials by utilizing centrifugal force;

the material conveying screw is connected with the concentric double-shaft mechanism and is arranged at the inner side of the rotary drum and used for scraping out solid matters which are tightly adhered to the screen mesh by centrifugal force to a discharge hole;

the concentric double-shaft mechanism is respectively connected with the rotary drum and the material conveying screw and is used for respectively transmitting power to the rotary drum and the material conveying screw;

the feeding mechanism comprises a feeding pipeline, a pushing screw, a third variable frequency motor and a rotating speed sensor, wherein the feeding pipeline is arranged above the rotary drum, the pushing screw is arranged in the feeding pipeline and used for pushing materials out of the feeding pipeline, the third variable frequency motor is connected with the pushing screw and used for providing power for the pushing screw, and the rotating speed sensor is arranged on one side of the pushing screw and used for detecting the rotating speed of the pushing screw;

the discharging mechanism is arranged below the rotary drum and comprises a discharging channel and a conveyor belt, the discharging channel is arranged on one side of a centrifuge shell at the large end of the rotary drum and is used for providing a preset discharging direction for solid-phase objects, the conveyor belt is arranged below the discharging channel and is used for conveying the solid-phase objects discharged by the discharging channel to a preset position, the conveyor belt also comprises a plurality of fans and a camera shooting detection unit, the fans are respectively arranged on two sides of the conveyor belt and are used for airing the solid-phase objects, and the camera shooting detection unit is arranged above the conveyor belt and is used for analyzing, identifying and judging the water content of the current solid-phase objects by utilizing machine vision;

the control panel comprises a display screen and a central control unit, wherein the display screen is used for displaying the rotating speeds of the rotary drum, the material conveying screw, the material pushing screw, the conveyor belt and the fan, the central control unit is used for respectively and correspondingly adjusting the speed difference of the concentric double shafts and the rotating speed of the third variable frequency motor according to the comparison result of the water content of the current solid-phase material and the preset water content, and correspondingly adjusting the first variable frequency motor and the second variable frequency motor according to the vibration amplitude and the vibration frequency of the concentric double shaft mechanism.

2. The efficient horizontal spiral discharge filter type centrifuge according to claim 1, wherein the concentric double-shaft mechanism comprises a first concentric shaft, a second concentric shaft, a first variable frequency motor, a second variable frequency motor and a key phase sensor, wherein the first concentric shaft is of a hollow structure and is arranged outside the second concentric shaft, the inner diameter of the first concentric shaft is tangential to the outer diameter of the second concentric shaft, the first concentric shaft is respectively connected with the rotary drum and the first variable frequency motor and is used for transmitting the torque of the first variable frequency motor to the rotary drum, the second concentric shaft is respectively connected with the feed screw and the second variable frequency motor and is used for transmitting the torque of the second variable frequency motor to the feed screw, and the key phase sensor is arranged on one side of the concentric double shaft and is used for detecting the vibration amplitude, the vibration frequency and the rotating speed of the concentric double shafts.

3. The efficient horizontal spiral discharge filter type centrifugal machine according to claim 1, wherein the camera detection unit comprises a camera, a memory and a processing chip, the camera is used for carrying out image acquisition at preset time intervals on materials on a conveyor belt, the memory is used for storing an image comparison group, the image comparison group comprises solid-phase object multi-angle images with different water contents, and the processing chip is used for judging the water content of the current solid-phase object according to the comparison result of the images acquired by the camera and the corresponding comparison examples in the image comparison group.

4. The efficient horizontal spiral discharge filter type centrifuge according to claim 3, wherein the image capturing detection unit performs image capturing at a preset time interval on the material on the conveyor belt, wherein the preset time interval is set to 1 second, the image capturing detection unit obtains the water content corresponding to 5 images according to the result of respectively comparing 5 continuously captured images with the corresponding image comparison example, and obtains the water content of the current solid-phase material according to the average value of the water content of 5 images.

5. The efficient horizontal spiral discharge filter centrifuge according to claim 1, wherein the central control unit judges whether the water content of the current solid phase material meets a preset water content requirement according to a comparison result of the water content MC0 of the current solid phase material on the conveyor belt and the preset water content MC, wherein MC comprises a first preset water content MC1 and a second preset water content MC2, MC1 is smaller than MC2,

when MC0 is less than MC1, the central control unit judges that the water content of the current solid phase substance is lower than the preset water content requirement;

when MC1 is more than or equal to MC0 and less than or equal to MC2, the central control unit judges that the water content of the current solid phase substance meets the preset water content requirement;

when MC0 is more than MC2, the central control unit judges that the water content of the current solid phase substance exceeds the preset water content requirement.

6. The efficient horizontal spiral discharge filter type centrifuge according to claim 2, wherein the central control unit determines whether the current rotation speed of the first variable frequency motor is continuously increased according to a comparison result of the current rotation speed CSP1 of the first variable frequency motor and the maximum rotation speed MSP1 of the first variable frequency motor, wherein,

when CSP1 is less than MSP1, the central control unit judges that the current rotating speed of the first variable frequency motor does not reach the maximum rotating speed, and the central control unit increases the current rotating speed of the first variable frequency motor;

when csp1=msp1, the central control unit determines that the current rotation speed of the first variable frequency motor has reached the maximum rotation speed, and the central control unit does not raise the current rotation speed of the first variable frequency motor.

7. The efficient horizontal screw discharge filter type centrifuge according to claim 6, wherein the central control unit determines whether the current speed difference needs to be adjusted according to a comparison result of the current speed difference CSD of the current rotation speed CSP1 of the first variable frequency motor and the current rotation speed CSP2 of the second variable frequency motor and a preset critical speed difference PSD, and determines whether each variable frequency motor, the conveyor belt, and the fan need to be adjusted respectively according to a comparison result of CSP1 and MSP1, wherein csd=csp1-csp2, and CSD > 0, each variable frequency motor includes a first variable frequency motor, a second variable frequency motor, and the third variable frequency motor,

when csd=psd, the central control unit determines that the current speed difference is equal to a preset critical speed difference, and does not increase the current speed difference any more;

if MC0 is less than MC1 and the current rotating speed of the first variable frequency motor can be increased, the central control unit controls each variable frequency motor to increase the current rotating speed and maintain the current speed difference, controls the conveyor belt to increase the current conveying speed of the solid-phase object and controls the fan to stop rotating;

if MC0 is less than MC1 and the current rotating speed of the first variable frequency motor cannot be increased, the central control unit controls the third variable frequency motor to increase the current rotating speed and maintain the current speed difference, controls the conveyor belt to increase the current conveying speed of the solid-phase object and controls the fan to stop rotating;

if MC1 is less than or equal to MC0 and less than or equal to MC2 at the moment and the current rotating speed of the first variable frequency motor can be increased, the central control unit controls each variable frequency motor to increase the current rotating speed, maintains the current speed difference, controls the conveyor belt to increase the current conveying speed of the solid-phase objects, and controls the fan to rotate;

if MC1 is less than or equal to MC0 and less than or equal to MC2 at the moment and the current rotating speed of the first variable frequency motor cannot be increased, the central control unit controls each variable frequency motor to maintain the current rotating speed and maintain the current speed difference, controls the conveyor belt to maintain the current conveying speed of the solid-phase object and controls the fan to stop rotating;

if MC0 is larger than MC2 and the current rotating speed of the first variable frequency motor can be increased, the central control unit controls the first variable frequency motor to increase the current rotating speed, maintains the current speed difference, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to increase the rotating speed;

if MC0 is larger than MC2 and the current rotating speed of the first variable frequency motor cannot be increased, the central control unit controls the third variable frequency motor to reduce the current rotating speed, controls the conveyor belt to reduce the current conveying speed of the solid phase object, and controls the fan to increase the rotating speed until the water content of the current solid phase object meets the preset water content requirement;

when CSD is smaller than PSD, the central control unit judges that the current speed difference is lower than a preset critical speed difference, and the current speed difference can be adjusted;

if MC0 is less than MC1 and the current rotation speed of the first variable frequency motor can be increased, the central control unit controls each variable frequency motor to increase the current rotation speed, increases the current rotation speed of the first variable frequency motor to csp1=msp1 and csd=psd, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to stop rotating;

if MC0 is less than MC1 and the current rotating speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current rotating speed to CSD=PSD, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to stop rotating;

if at this time MC1 is less than or equal to MC0 and less than or equal to MC2, and the current rotating speed of the first variable frequency motor can be increased, the central control unit controls each variable frequency motor to increase the current rotating speed, increases the current rotating speed of the first variable frequency motor to CSP1=MSP1, and CSD=PSD, controls the third variable frequency motor to increase the current rotating speed, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to rotate;

if MC1 is less than or equal to MC0 and less than or equal to MC2 at the moment and the current rotating speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current rotating speed to CSD=PSD, controls the third variable frequency motor to increase the current rotating speed, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to rotate;

if MC0 is greater than MC2 and the current rotation speed of the first variable frequency motor can be increased, the central control unit controls the first variable frequency motor to increase the current rotation speed, controls the second variable frequency motor to decrease the current rotation speed to csd=psd, controls the conveyor belt to increase the current conveying speed of the solid-phase object, and controls the fan to increase the rotation speed;

if MC0 is greater than MC2 and the current rotation speed of the first variable frequency motor cannot be increased, the central control unit controls the second variable frequency motor to reduce the current rotation speed to csd=psd, controls the conveyor belt to reduce the current conveying speed of the solid-phase object, and controls the fan to increase the rotation speed.

8. The efficient horizontal spiral discharge filter type centrifuge according to claim 1, wherein the central control unit determines whether the current rotation speed of the third variable frequency motor is continuously reduced according to a comparison result of the current rotation speed CSP3 of the third variable frequency motor and a preset minimum rotation speed LSP3 of the third variable frequency motor, wherein,

when CSP3 is more than LSP3, the central control unit judges that the current rotating speed of the third variable frequency motor is greater than the minimum rotating speed, and the central control unit reduces the current rotating speed of the third variable frequency motor;

when csp3=lsp3, the central control unit determines that the current rotation speed of the third variable frequency motor has reached the minimum rotation speed, and the central control unit does not reduce the current rotation speed of the third variable frequency motor.

9. The efficient horizontal spiral discharge filter centrifuge of claim 8, wherein when the central control unit determines that the current rotation speed of the first variable frequency motor cannot be increased, csd=psd, and csp3=lsp3, if MC0 > MC2, the central control unit controls the conveyor belt to reduce the current conveying speed of the solid phase object, controls the fan to increase the rotation speed, outputs an abnormal prompt to the display screen, and stops the centrifugation operation.

10. The efficient horizontal screw unloading filter type centrifuge according to claim 2, wherein the central control unit respectively adjusts the second variable frequency motor according to a comparison result of the vibration amplitude CVA detected by the key phase sensor and the preset vibration amplitude PVA and a comparison result of the vibration frequency CVF and the preset vibration frequency PVF,

when CVA is more than or equal to PVA, the central control unit judges that the current vibration amplitude of the concentric double shafts exceeds the preset vibration amplitude standard, and the second variable frequency motor is required to be controlled to increase the current rotating speed;

when CVA is smaller than PVA, the central control unit judges that the current vibration amplitude of the concentric double shafts does not exceed the preset vibration amplitude standard, and the second variable frequency motor does not need to be adjusted;

when CVF is more than or equal to PVF, the central control unit judges that the current vibration frequency of the concentric double shafts exceeds a preset vibration frequency standard, and the second variable frequency motor is required to be controlled to increase the current rotating speed;

when CVF is smaller than PVF, the central control unit judges that the current vibration frequency of the concentric double shafts does not exceed the preset vibration frequency standard, and the second variable frequency motor does not need to be adjusted.

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