CN112474082A - Safety detection and limitation method for overspeed of centrifugal machine - Google Patents
Safety detection and limitation method for overspeed of centrifugal machine Download PDFInfo
- Publication number
- CN112474082A CN112474082A CN202011239919.8A CN202011239919A CN112474082A CN 112474082 A CN112474082 A CN 112474082A CN 202011239919 A CN202011239919 A CN 202011239919A CN 112474082 A CN112474082 A CN 112474082A
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- Prior art keywords
- safety
- overspeed
- speed
- centrifuge
- centrifugal machine
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- 238000000034 method Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 title claims description 7
- 238000000926 separation method Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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- Centrifugal Separators (AREA)
Abstract
The whole control system consists of a centrifuge drum speed measuring device, an overspeed relay with an alarm threshold value for a centrifuge speed measuring sensor, a safety function relay, a frequency converter with a safety torque function and a driving device.
Description
Technical Field
The invention belongs to the technical field of horizontal screw centrifuges, and particularly relates to a safety detection and limitation method for overspeed of a centrifuge.
Background
The selection of the horizontal screw centrifuge is a device for performing solid-liquid separation on suspension feed liquid by utilizing the centrifugal separation principle. The working principle is that the rotary drum and the screw rotate at a high speed in the same direction at a certain differential speed, materials are continuously introduced into the conveying screw inner cylinder through the feeding pipe, enter the rotary drum after being accelerated, and heavy solid-phase substances are deposited on the wall of the rotary drum to form a slag layer under the action of a centrifugal force field. The conveying screw continuously pushes the deposited solid-phase substances to the conical end of the rotary drum and discharges the solid-phase substances out of the machine through the slag discharge port. The lighter liquid phase forms an inner layer liquid ring, continuously overflows from the rotary drum through an overflow port at the large end of the rotary drum, and is discharged out of the machine through a liquid discharge port. The horizontal screw centrifuge can continuously feed, separate, wash and discharge materials under full speed operation. The device has the characteristics of compact structure, continuous operation, stable operation, strong adaptability, high production capacity, convenient maintenance and the like. Is suitable for separating suspension containing solid phase with particle size of more than 0.005mm and concentration of 2-40%. It can be widely used in chemical industry, light industry, pharmacy, food industry, environmental protection industry, etc.
The centrifugal machine is used as high-rotation-speed and large-inertia rotating equipment, a vibration alarm and a bearing temperature control alarm are generally adopted as protection measures of a safety mechanism of the centrifugal machine, the vibration alarm and the bearing temperature control alarm are used as fault shutdown conditions of the centrifugal machine, the rotation speed limit adopts a frequency converter to set an upper limit frequency to limit the rotation speed of the centrifugal machine, and the limitation of the overspeed operation of the centrifugal machine is used for achieving the limitation of the overspeed operation of the centrifugal machine.
Disclosure of Invention
The invention aims to provide a method for safely detecting and limiting the overspeed of a centrifugal machine aiming at the technical defect of great potential safety hazard of the existing overspeed limiting mode of the centrifugal machine.
Technical scheme
In order to achieve the technical purpose, the invention provides a method for safety detection and limitation of overspeed of a centrifugal machine, which is characterized by comprising the following steps: the method comprises the following steps:
(1) automatic starting;
(2) enabling a safety relay;
(3) enabling a safe torque function of the frequency converter;
(4) starting the centrifugal machine;
(5) starting a speed measuring function, and detecting whether the speed is higher than 151 HZ;
(6) if the speed is higher than 151HZ, the safety relay is switched off safely, the action output is switched off, and the safety torque function of the frequency converter is operated. The frequency converter is freely stopped;
if the speed is less than 151HZ, the centrifuge enters the separation work after reaching the set frequency and the end is known.
Advantageous effects
The invention provides a safety detection and limitation method for centrifuge overspeed.A whole control system consists of a centrifuge drum speed measurement device, an overspeed relay with an alarm threshold value for a centrifuge speed measurement sensor, a safety function relay, a frequency converter with a safety torque function and a driving device.
Drawings
FIG. 1 is a flow chart of the operation of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The system in the embodiment comprises a centrifuge drum speed measuring device, a centrifuge speed measuring sensor (PNP type proximity switch), an overspeed relay with an alarm threshold value, a safety function relay, a frequency converter with a safety torque function and a driving device. The double-circuit cut-off protection of the safety function relay can protect the effective safety function of the centrifuge overspeed, and avoids the condition of overspeed operation of the centrifuge system.
As shown in the attached figure 1, the method for detecting and limiting the overspeed safety of the centrifugal machine based on the system comprises the following steps:
firstly, automatically starting;
secondly, enabling a safety relay;
thirdly, enabling a safety torque function of the frequency converter;
fourthly, starting the centrifugal machine;
fifthly, starting a speed measuring function and detecting whether the speed is higher than 151 HZ;
and sixthly, if the speed is higher than 151HZ, the safety relay is switched off safely, the action output is switched off, and the safety torque function of the frequency converter is operated. The frequency converter is freely stopped;
if the speed is less than 151HZ, the centrifuge enters the separation work after reaching the set frequency and the end is known.
The invention provides a safety detection and limitation method for centrifuge overspeed.A whole control system consists of a centrifuge drum speed measurement device, an overspeed relay with an alarm threshold value for a centrifuge speed measurement sensor, a safety function relay, a frequency converter with a safety torque function and a driving device.
Claims (1)
1. A method for safety detection and limitation of centrifuge overspeed, characterized by: the method comprises the following steps:
(1) automatic starting;
(2) enabling a safety relay;
(3) enabling a safe torque function of the frequency converter;
(4) starting the centrifugal machine;
(5) starting a speed measuring function, and detecting whether the speed is higher than 151 HZ;
(6) if the speed is higher than 151HZ, the safety relay is switched off safely, the action output is switched off, and the safety torque function of the frequency converter is operated. The frequency converter is freely stopped;
if the speed is less than 151HZ, the centrifuge enters the separation work after reaching the set frequency and the end is known.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239919.8A CN112474082A (en) | 2020-11-09 | 2020-11-09 | Safety detection and limitation method for overspeed of centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239919.8A CN112474082A (en) | 2020-11-09 | 2020-11-09 | Safety detection and limitation method for overspeed of centrifugal machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112474082A true CN112474082A (en) | 2021-03-12 |
Family
ID=74928978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011239919.8A Pending CN112474082A (en) | 2020-11-09 | 2020-11-09 | Safety detection and limitation method for overspeed of centrifugal machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112474082A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602666A (en) * | 2022-03-17 | 2022-06-10 | 长沙金泰时仪器有限公司 | Centrifuge rotor stall detection processing method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009217A1 (en) * | 1987-05-22 | 1988-12-01 | Beckman Instruments, Inc. | Method and apparatus for overspeed protection for high speed centrifuges |
| CN203416199U (en) * | 2013-06-25 | 2014-01-29 | 张家港市通江机械有限公司 | Centrifuge emergency brake circuit structure |
| CN204261821U (en) * | 2014-10-28 | 2015-04-15 | 邢国峰 | Tubular-bowl centrifuge |
| CN105619589A (en) * | 2016-03-07 | 2016-06-01 | 湖北中南管道有限公司 | Safety guarantee device for centrifugal machine |
| CN206199125U (en) * | 2016-10-26 | 2017-05-31 | 泰州安井食品有限公司 | A kind of beating equipment of on-line monitoring |
| CN206363148U (en) * | 2017-01-17 | 2017-07-28 | 基伊埃机械设备（天津）有限公司 | A kind of safe jerk control device of centrifuge |
| CN108415474A (en) * | 2018-03-12 | 2018-08-17 | 深圳市海浦蒙特科技有限公司 | Frequency converter control method and frequency converter applied to filter press |
| CN108452960A (en) * | 2017-02-20 | 2018-08-28 | 迈得医疗工业设备股份有限公司 | The brake control system and dialyzer centrifugal device of dialyzer concentrator bowl |
-
2020
- 2020-11-09 CN CN202011239919.8A patent/CN112474082A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009217A1 (en) * | 1987-05-22 | 1988-12-01 | Beckman Instruments, Inc. | Method and apparatus for overspeed protection for high speed centrifuges |
| CN1030199A (en) * | 1987-05-22 | 1989-01-11 | 贝克曼仪器有限公司 | A kind of method and apparatus of overspeed protection for high speed centrifuges |
| CN203416199U (en) * | 2013-06-25 | 2014-01-29 | 张家港市通江机械有限公司 | Centrifuge emergency brake circuit structure |
| CN204261821U (en) * | 2014-10-28 | 2015-04-15 | 邢国峰 | Tubular-bowl centrifuge |
| CN105619589A (en) * | 2016-03-07 | 2016-06-01 | 湖北中南管道有限公司 | Safety guarantee device for centrifugal machine |
| CN206199125U (en) * | 2016-10-26 | 2017-05-31 | 泰州安井食品有限公司 | A kind of beating equipment of on-line monitoring |
| CN206363148U (en) * | 2017-01-17 | 2017-07-28 | 基伊埃机械设备（天津）有限公司 | A kind of safe jerk control device of centrifuge |
| CN108452960A (en) * | 2017-02-20 | 2018-08-28 | 迈得医疗工业设备股份有限公司 | The brake control system and dialyzer centrifugal device of dialyzer concentrator bowl |
| CN108415474A (en) * | 2018-03-12 | 2018-08-17 | 深圳市海浦蒙特科技有限公司 | Frequency converter control method and frequency converter applied to filter press |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602666A (en) * | 2022-03-17 | 2022-06-10 | 长沙金泰时仪器有限公司 | Centrifuge rotor stall detection processing method |
| CN114602666B (en) * | 2022-03-17 | 2024-07-12 | 长沙金泰时仪器有限公司 | Method for detecting and processing stall of centrifuge rotor |
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Application publication date: 20210312 |