Flow-adjustable precise feeding device for centrifugal machine

Abstract

The utility model discloses a flow-adjustable centrifugal machine accurate feeding device, which belongs to the technical field of metallurgical equipment and comprises a feeding mechanism, a control mechanism and a safety mechanism, the feeding mechanism consists of a raw material storage tank and a centrifugal machine which are connected through a pipeline, and a weighing mechanism is arranged below the centrifugal machine; the control mechanism comprises a PLC (Programmable Logic Controller), a flow meter, a high-speed valve and a low-speed valve which are electrically connected with the PLC; the safety mechanism comprises an emergency cut-off valve and a monitoring mechanism and is also connected with the PLC; the pipeline comprises a discharging pipeline, a branch pipeline and a feeding pipeline, the emergency cut-off valve is mounted on the discharging pipeline, and the flow meter is mounted on the feeding pipeline; the high-speed valve is an electric butterfly valve, and the low-speed valve is an electric regulating valve; the monitoring mechanism comprises a pressure sensor, a temperature sensor and a rotating speed sensor; and the separation efficiency and the product quality are obviously improved by accurately controlling the feeding flow.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metallurgical equipment technical field, concretely relates to a flow adjustable centrifuge precision feeding device. BACKGROUND

[0002] As a kind of equipment widely used in metallurgy, chemical industry, the main function of centrifuge is to realize the solid-liquid separation of material using centrifugal force, and the running efficiency and stability of centrifuge have direct influence on production efficiency and product quality, traditional centrifuge feeding system usually adopts single valve control, this control mode has the problems of low control precision and slow response speed, on the one hand, single valve is difficult to realize the accurate control of material flow, leading to large feeding pressure fluctuation, poor feeding uniformity, and further affect feeding efficiency and the stability of product quality, when facing different material characteristics and production requirements, lack of flexibility and adaptability, on the other hand, single valve control cannot adjust feeding strategy according to different working conditions, so that centrifuge is difficult to achieve optimal separation effect when processing different materials.

[0003] The prior art with the announcement number CN210357580U includes centrifuge body, drum, drive motor, cloth pipe and computer-controlled automatic valve and flowmeter, and the computer-controlled automatic valve and flowmeter are used to monitor and adjust feeding and separation time, to improve separation efficiency and save time, and the control mechanism of the device mainly relies on computer-controlled automatic valve and flowmeter, lacks the setting of emergency brake and monitoring mechanism, limits its performance in feeding flow control precision, response speed and safety. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the defects in prior art are overcome, and a flow adjustable centrifuge precision feeding device is provided.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The flow adjustable centrifuge precision feeding device provided by the utility model includes feeding mechanism, control mechanism and safety mechanism, the feeding mechanism includes raw material storage tank and centrifuge, the centrifuge is provided with feeding port, and the raw material storage tank is connected with the feeding port through pipeline;The weighing mechanism is arranged below the centrifuge;The control mechanism includes PLC controller, flowmeter, high-speed valve and low-speed valve, the high-speed valve and the low-speed valve are electrically connected with the PLC controller;The safety mechanism includes emergency shut-off valve and monitoring mechanism, the emergency shut-off valve is connected with brake button, and the monitoring mechanism is electrically connected with the PLC controller.

[0007] The pipeline comprises a discharge pipeline, a branch pipeline and a feeding pipeline connected in sequence, the discharge pipeline is connected with the raw material storage tank, and the feeding pipeline is connected with the feeding port; the discharge pipeline and the feeding pipeline are both connected with the branch pipeline through a tee joint.

[0008] An emergency shut-off valve is installed on the discharge pipeline, and a flow meter is installed on the feeding pipeline.

[0009] The branch pipeline comprises a high-speed pipeline and a low-speed pipeline, and a high-speed valve and a low-speed valve are installed on the high-speed pipeline and the low-speed pipeline respectively.

[0010] The high-speed valve is an electric butterfly valve, and the low-speed valve is an electric regulating valve.

[0011] The monitoring mechanism comprises a pressure sensor, a temperature sensor and a rotational speed sensor, and the pressure sensor, the temperature sensor and the rotational speed sensor are all electrically connected with the PLC controller and are all installed in the centrifuge.

[0012] The weighing mechanism comprises a weighing sensor and a metering tank body, the weighing sensor is arranged at the bottom end in the metering tank body, the centrifuge is arranged above the weighing sensor, and the weighing sensor is electrically connected with the PLC controller.

[0013] The centrifuge has the following beneficial effects:

[0014] 1. The high-speed valve and the low-speed valve realize accurate control of the material flow, ensure the stability of the flow, and improve the separation efficiency of the centrifuge and the product quality.

[0015] 2. The raw material storage tank is directly connected with the centrifuge through the pipeline, the feeding process is simplified, the loss and pollution of the material in the conveying process are reduced, and the feeding efficiency is improved.

[0016] 3. The use of the PLC controller realizes accurate control of the high-speed valve and the low-speed valve, the response speed and the control accuracy are improved through electrical connection, and the accurate adjustment of the feeding flow is ensured.

[0017] 4. The electrical connection of the emergency shut-off valve and the monitoring mechanism with the PLC controller enhances the safety of the system, when an abnormal condition is detected, the feeding can be quickly cut off to prevent the accident from expanding, the equipment state is monitored in real time, and the operation safety is ensured.

[0018] 5. The discharge pipeline and the feeding pipeline are connected with the branch pipeline through a tee joint, flexible pipeline layout and flow control are provided, and the switching of high-speed and low-speed feeding is facilitated.

[0019] 6. The high-speed valve is an electric butterfly valve, and the low-speed valve is an electric regulating valve, which combines the advantages of fast response and fine adjustment, and realizes wide-range and high-precision control of the feeding flow.

[0020] 7. The weighing mechanism comprises a weighing sensor and a metering tank body, precise material metering is provided, the accuracy of the feed amount is ensured, and product quality and production efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a schematic view of the utility model;

[0022] Fig. 2 It is an electrical connection block diagram of the utility model.

[0023] Wherein: 1, raw material storage tank; 2, centrifuge; 3, feed inlet; 4, flowmeter; 5, high-speed valve; 6, low-speed valve; 7, emergency shut-off valve; 8, discharge pipeline; 9, feed pipeline; 10, high-speed pipeline; 11, low-speed pipeline; 12, weighing sensor; 13, metering tank body. DETAILED DESCRIPTION

[0024] As Figs. 1-2 Indicated in the utility model, the flow-adjustable centrifuge precise feeding device, including feeding mechanism, control mechanism and safety mechanism, feeding mechanism includes raw material storage tank 1 and centrifuge 2, and centrifuge 2 is equipped with feed inlet 3, and raw material storage tank 1 is connected feed inlet 3 through pipeline;Weighing mechanism is arranged below centrifuge 2;Control mechanism includes PLC controller, flowmeter 4, high-speed valve 5 and low-speed valve 6, and high-speed valve 5 and low-speed valve 6 are electrically connected with PLC controller;Safety mechanism includes emergency shut-off valve and monitoring mechanism, and emergency shut-off valve 7 is connected with brake button, and monitoring mechanism is electrically connected with PLC controller.

[0025] Pipeline includes discharge pipeline 8, branch pipeline and feed pipeline 9 connected in sequence, discharge pipeline 8 connects raw material storage tank 1, and feed pipeline 9 connects feed inlet 3;Discharge pipeline 8 and feed pipeline 9 are connected with branch pipeline through tee joint.

[0026] Emergency shut-off valve 7 is installed on discharge pipeline 8, and flowmeter 4 is installed on feed pipeline 9.

[0027] Branch pipeline includes high-speed pipeline 10 and low-speed pipeline 11, and high-speed valve 5 and low-speed valve 6 are installed on high-speed pipeline 10 and low-speed pipeline 11 respectively.

[0028] High-speed valve 5 adopts electric butterfly valve, and low-speed valve 6 adopts electric regulating valve.

[0029] Monitoring mechanism includes pressure sensor, temperature sensor and rotational speed sensor, and the pressure sensor, temperature sensor and rotational speed sensor are electrically connected with PLC controller, and the pressure sensor, temperature sensor and rotational speed sensor are installed in centrifuge 2.

[0030] The weighing mechanism comprises a weighing sensor 12 and a metering tank body 13, the weighing sensor 12 is arranged at the bottom end inside the metering tank body 13, the centrifuge 2 is arranged above the weighing sensor 12, and the weighing sensor 12 is electrically connected with the PLC controller.

[0031] Specifically, the raw material storage tank 1 in the feeding mechanism is connected with a discharge pipeline 8, the discharge pipeline 8 is connected with branch pipelines through a three-way pipe, two ports of the three-way pipe are connected with a high-speed pipeline 10 and a low-speed pipeline 11 respectively, the branch pipelines are connected with a feeding pipeline 9 through the three-way pipe, and the feeding pipeline 9 is connected with the centrifuge 2 through a feeding port 3. The high-speed pipeline 10 is provided with a high-speed valve 5, the high-speed valve 5 is an electric butterfly valve with a DN100 specification, the opening and closing time of the electric butterfly valve is less than 20s, and the low-speed pipeline 11 is provided with a low-speed valve 6, the low-speed valve 6 is an electric regulating valve with a DN25 specification, and the regulating accuracy is less than 1%.

[0032] Specifically, a weighing mechanism is arranged below the centrifuge 2, the weighing mechanism comprises a weighing sensor 12 with a precision of 0.05% and a metering tank body 13 with a solvent of 50L.

[0033] Specifically, the control mechanism comprises a PLC controller, the PLC controller is a Siemens 1217C, and the PLC controller is electrically connected with the high-speed valve 5, the low-speed valve 6, the emergency stop valve 7, the monitoring mechanism and the weighing sensor 12.

[0034] Specifically, at the initial stage of feeding, the high-speed valve 5 is fully opened, and the low-speed valve 6 is adjusted to an opening degree of 30%, so that rapid feeding is realized; when the weighing sensor 12 detects that 80% of the target weight is reached, the high-speed valve 5 is closed, and the low-speed valve 6 is adjusted to an opening degree of 50%, so that accurate feeding is realized; when the weighing sensor 12 detects that 95% of the target weight is reached, the low-speed valve 6 is adjusted to an opening degree of 20%, so that compensation adjustment is realized, the valve opening degree is adjusted adaptively according to the weight change; when the weighing sensor 12 detects that the target weight is reached, the small valve is closed, and the feeding is completed.

[0035] Specifically, the monitoring mechanism of the safety mechanism relies on the control mechanism, can display various operating parameters online, and can give an alarm for abnormal data, so that the operator can adjust and maintain in time, the emergency stop valve 7 is provided with a button on the equipment site, and is independent of the control mechanism, so that the equipment can be stopped quickly in an abnormal situation.

Claims

1. A precisely feeding device of a flow-adjustable centrifuge, comprising a feeding mechanism, a control mechanism and a safety mechanism, characterized in that, The feeding mechanism comprises a raw material storage tank (1) and a centrifuge (2), the centrifuge (2) is provided with a feeding port (3), the raw material storage tank (1) is connected with the feeding port (3) through a pipeline; the lower part of the centrifuge (2) is provided with a weighing mechanism; the control mechanism comprises a PLC controller, a flow meter (4), a high-speed valve (5) and a low-speed valve (6), the high-speed valve (5) and the low-speed valve (6) are electrically connected with the PLC controller; the safety mechanism comprises an emergency shut-off valve (7) and a monitoring mechanism, the emergency shut-off valve (7) is connected with a brake button, and the monitoring mechanism is electrically connected with the PLC controller.

2. The precision feed device for a flow-adjustable centrifuge according to claim 1, characterized in that The pipeline comprises a discharge pipeline (8), a branch pipeline and a feeding pipeline (9) connected in sequence, the discharge pipeline (8) is connected with the raw material storage tank (1), and the feeding pipeline (9) is connected with the feeding port (3); the discharge pipeline (8) and the feeding pipeline (9) are connected with the branch pipeline through a tee joint.

3. The precision feed device for a flow-adjustable centrifuge according to claim 2, characterized in that The emergency shut-off valve (7) is installed on the discharge pipeline (8), and the flow meter (4) is installed on the feeding pipeline (9).

4. The precision feed device for a flow-adjustable centrifuge according to claim 2, wherein The branch pipeline comprises a high-speed pipeline (10) and a low-speed pipeline (11), and the high-speed valve (5) and the low-speed valve (6) are installed on the high-speed pipeline (10) and the low-speed pipeline (11) respectively.

5. The precision feed device for a flow-adjustable centrifuge according to claim 4, characterized in that The high-speed valve (5) is an electric butterfly valve, and the low-speed valve (6) is an electric regulating valve.

6. The precision feed device for a flow-adjustable centrifuge of claim 1, wherein, The monitoring mechanism comprises a pressure sensor, a temperature sensor and a rotating speed sensor, and the pressure sensor, the temperature sensor and the rotating speed sensor are electrically connected with the PLC controller; the pressure sensor, the temperature sensor and the rotating speed sensor are installed in the centrifuge (2).

7. The precision feed device for a flow-adjustable centrifuge of claim 1, wherein, The weighing mechanism comprises a weighing sensor (12) and a metering tank body (13), the weighing sensor (12) is arranged at the bottom end in the metering tank body (13), the centrifuge (2) is arranged above the weighing sensor (12), and the weighing sensor (12) is electrically connected with the PLC controller.

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