Centrifugal machine washing control method and washing water collecting device thereof

Abstract

The invention discloses a centrifugal machine washing control method and a washing water collecting device thereof. The centrifugal machine washing control device is characterized by comprising a fixed box body connected with a centrifugal machine, a washing water collecting and discharging groove, a guide rail, a cart and a driving source, wherein the washing water collecting and discharging groove and the guide rail are installed on the fixed box body; the cart is installed on the guide rail in a sliding mode; the fixed box body is further provided with a first proximity switch and a second proximity switch which are used for sensing the position of the cart. The cart is driven by the driving source to move, flushing water is collected in a unified mode, the situation that the water content of separated solid materials is increased due to the fact that the flushing water enters the separated solid materials is prevented, and the separation effect is improved.

Description

Technical Field

[0001] This invention relates to the field of centrifuge rinsing technology, specifically to a centrifuge rinsing control method and a rinsing water collection device. Background Technology

[0002] During the application of pusher centrifuges, after separating materials for a certain period of time, the separation effect of the materials will decrease, the residual moisture content of the filter cake will increase, and the material in the centrifuge drum needs to be rinsed clean before refeeding. Other special circumstances (such as motor tripping, abnormal speed, etc.) may cause the centrifuge equipment to be shut down for inspection. Before shutdown, the material in the drum needs to be rinsed clean. When the drum is rinsed, a large amount of rinsing water will flow out from the solid collection chamber. If it is not blocked, the rinsing water will enter the drying bed, causing the drying bed to malfunction. Therefore, a centrifuge rinsing control method and its rinsing water collection device are proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the above problems by proposing a centrifuge rinsing control method and a rinsing water collection device.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a centrifuge rinsing control method, characterized in that the control method is as follows: After the centrifuge starts up, the PLC system performs a self-test and the proximity switch pair senses the position of the trolley. If it cannot sense the position, the electric push rod moves the trolley to the position of the proximity switch. After the trolley is in place, the feeding solenoid valve opens to feed the material. The oil pump motor and main motor current detection module monitors the current change in real time. If the current of the oil pump motor and main motor exceeds the rated value, it is necessary to check the circuit and whether there is any abnormality in the centrifuge. The PLC system controls the feeding solenoid valve to stop feeding and controls the trolley to move to the position of proximity switch two. After the proximity switch two senses the trolley, it issues a command, and the PLC system controls the flushing water valve to unlock and flush. The vibration sensor monitors the equipment vibration value in real time. If the equipment vibration value is greater than the threshold, and the vibration value is still greater than the threshold after the vibration value detection delay is set, or if the vibration value is greater than 1 times or more of the threshold, the feeding will be stopped immediately. The cause of the equipment vibration needs to be checked. The PLC system controls the feeding solenoid valve to stop feeding and controls the trolley to move to the position of proximity switch two. After proximity switch two senses the trolley, it issues a command, and the PLC system controls the flushing water valve to unlock and flush. The cylinder speed detection proximity switch generates an alternating current when the cylinder rotates. The cylinder speed, i.e. the drum speed, is calculated based on the alternating current. If the speed monitoring is lower than the rated speed for a long time, or if it is lower than the rated speed multiple times within a set time, the PLC system controls the feeding solenoid valve to stop feeding. At the same time, it controls the trolley to move to the second position of the proximity switch, unlocks the flushing water valve, and flushes the drum with water. After flushing, the machine is stopped to check the cause of the speed drop. The push-time detection device monitors the push-time of the equipment in real time. When the push-time of the equipment is higher or lower than the normal set push-time, the machine needs to be stopped to check the hydraulic system. The PLC system controls the feeding solenoid valve to stop feeding and controls the trolley to move to the position of proximity switch two. After the proximity switch two senses the trolley, it sends a command, and the PLC system controls the flushing water valve to unlock and flush. Preferably, if the proximity switch 2 does not detect the cart within a set time, it will issue an alarm, requiring manual intervention for inspection.

[0005] As a preferred method, to achieve good separation results, timed rinsing is necessary. The rinsing interval varies depending on the material to ensure separation efficiency, but rinsing must be performed once every 8 working hours. After a certain working time, the PLC system controls the feeding solenoid valve to stop feeding, and then controls the trolley to move to the position of proximity switch two. After proximity switch two senses the trolley, it issues a command, and the PLC system controls the rinsing water valve to unlock and flush.

[0006] A flushing water collection device for a centrifuge flushing control method is characterized by comprising: a fixed housing connected to the centrifuge, a flushing water collection and discharge trough and a guide rail installed on the fixed housing, a trolley slidably installed on the guide rail, and a drive source for driving the trolley; the fixed housing is also equipped with a proximity switch one and a proximity switch two for sensing the position of the trolley.

[0007] Preferably, the trolley includes a water collection tank, a baffle mounted on the water collection tank and a fixed hook connected to a drive source, several guide rods mounted on the bottom of the water collection tank, rollers mounted on the guide rods, and several drain outlets provided on the water collection tank.

[0008] Preferably, the water collection tank is also equipped with a diversion buffer net for diverting the flushing water and an inclined guide plate for guiding the flushing water flow.

[0009] Preferably, the baffle also includes a cleaning block for removing material from the guide rail.

[0010] Preferably, the flushing water collection and discharge tank is also provided with a centralized drain outlet.

[0011] Preferably, the drive source can be an electric actuator, a pneumatic cylinder, or a hydraulic cylinder.

[0012] The beneficial effects of this invention are as follows: the parameters of the centrifuge are monitored in real time by the oil pump motor and main motor current detection module, vibration sensor, oil cylinder speed detection proximity switch and push number detection device. When the parameters exceed the threshold or the equipment working time reaches the set value, the feeding is automatically stopped. When the trolley moves to the position, the flushing water valve is opened to unlock the flushing, thereby realizing automated flushing. The trolley is driven by a drive source to collect the rinsing water in a unified manner, preventing the rinsing water from entering the separated solid materials and causing an increase in the moisture content of the separated solid materials, thus improving the separation effect. Attached Figure Description

[0013] Figure 1 This is a diagram showing the usage state of the present invention.

[0014] Figure 2 This is a schematic diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure of the present invention.

[0016] Figure 4 This is the front view of the present invention.

[0017] Figure 5 This is a side cross-sectional view of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure of the trolley of the present invention.

[0019] Legend: 1. Fixed box; 2. Rinse water collection and discharge trough; 3. Guide rail; 4. Trolley; 401. Water collection tank; 402. Baffle; 403. Fixed hook; 404. Guide rod; 405. Roller; 406. Drain outlet; 407. Diversion buffer net; 408. Inclined guide plate; 409. Rail cleaning block; 410. Centralized drain outlet; 5. Drive source; 6. Proximity switch one; 7. Proximity switch two; 8. Oil pump current detection module; 9. Vibration sensor; 10. Oil cylinder speed detection proximity switch; 11. Pushing number detection device. Detailed Implementation

[0020] The centrifuge rinsing control method and its rinsing water collection device according to the present invention will be further described below with reference to the accompanying drawings.

[0021] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0022] See appendix Figure 3-6As shown, this embodiment includes a fixed housing 1 connected to the centrifuge, a flushing water collection and discharge trough 2 and a guide rail 3 installed on the fixed housing 1, a trolley 4 slidably installed on the guide rail 3, and a drive source 5 for driving the trolley 4. The fixed housing 1 is also equipped with a proximity switch 6 and a proximity switch 7 for sensing the position of the trolley 4. The drive source 5 can be an electric push rod, a pneumatic cylinder, or a hydraulic cylinder. The centrifuge parameters are monitored in real time by an oil pump current detection module 8, a vibration sensor 9, a cylinder speed detection proximity switch 10, and a feeding frequency detection device 11. When the parameters exceed the threshold, the feeding is automatically stopped and the flushing water valve is opened to unlock the flushing, thereby realizing automated flushing. Driven by the drive source 5, the trolley 4 is moved to collect the rinsing water in a unified manner, preventing the rinsing water from entering the separated solid material, which would increase the moisture content of the separated solid material and improve the separation effect. By using proximity switch 6 and proximity switch 7 to sense the position of the trolley 4 and sending the signal to the PLC system, the PLC system can accurately control the position of the trolley 4.

[0023] See appendix Figure 3-6 As shown, the trolley 4 includes a water collection tank 401, a baffle 402 mounted on the water collection tank 401, a fixing hook 403 connected to the drive source 5, several guide rods 404 mounted on the bottom of the water collection tank 401, rollers 405 mounted on the guide rods 404, and several drain outlets 406 provided on the water collection tank 401; the water collection tank 401 is also equipped with a diversion buffer net 407 for diverting the flushing water and an inclined guide plate 408 for guiding the flushing water; the baffle 402 is also equipped with a cleaning block 409 for cleaning materials on the guide rail 3; the flushing water collection and discharge tank 2 is also equipped with a centralized drain outlet 410; the diversion buffer net 407 diverts the flushing water... The flushing water entering the water collection tank 401 is diverted and buffered to reduce the water velocity. Then, the inclined guide plate 408 guides the flushing water in the water collection tank 401, so that the flushing water enters the flushing water collection and discharge tank 2 through the drain outlet 406 and is finally discharged from the centralized drain outlet 410. This facilitates the unified collection of flushing water and prevents flushing water from entering the separated solid materials, which would increase the moisture content of the separated solid materials and improve the separation effect. The cleaning block 409 removes the material accumulated on the guide rail 3 when the roller 405 drives the water collection tank 401 to move along the guide rail 3, thereby improving the stability of the movement of the water collection tank 401.

[0024] The working process of this invention is described in the appendix. Figure 1-2As shown, the centrifuge starts up and completes its self-test. The PLC system performs a self-test and the proximity switch 6 senses the position of the trolley 4. If the trolley 4 is not in the position, the PLC system controls the drive source 5 to move the trolley 4 to the position of the proximity switch 6. After the trolley 4 is in position, the feeding solenoid valve opens to feed the material. The oil pump motor and main motor current detection module 8 monitors the current change in real time. If the oil pump motor and main motor trip, the PLC system controls the feeding solenoid valve to stop feeding and controls the drive source 5 to drive the trolley 4 to the position of proximity switch 2 7. After the proximity switch 2 7 senses the trolley 4, it issues a command, and the PLC system controls the flushing water valve to unlock and flush. Vibration sensor 9 monitors the changes in equipment vibration value in real time. If the equipment vibration value is greater than the threshold, the vibration value detection is delayed for 10 seconds. If the vibration value is still greater than the threshold or if the vibration value is greater than 1 times the threshold, the PLC system controls the feeding solenoid valve to close and immediately stop feeding. It also controls the drive source 5 to drive the trolley 4 to move to the position of proximity switch 2 7. After the proximity switch 2 7 senses the trolley 4, it sends a command to the PLC system. The PLC system controls the flushing water valve to unlock and flush. If proximity switch 7 does not detect cart 4 within 8 seconds, an alarm will be triggered, requiring manual intervention for inspection. After rinsing, the rinse water is separated and buffered by the diversion buffer net 407 and then enters the water collection tank 401. The inclined guide plate 408 guides the rinse water in the water collection tank 401, and the rinse water is uniformly discharged into the rinse water collection and discharge tank 2 through the drain outlet 406. Finally, it is uniformly discharged from the centralized drain outlet 410, which facilitates the unified collection of rinse water and prevents the rinse water from entering the separated solid materials, which would increase the moisture content of the separated solid materials and improve the separation effect.

[0025] In one embodiment, the cylinder speed detection proximity switch 10 generates an alternating current when the cylinder rotates. The cylinder speed, i.e., the drum speed, is calculated based on the alternating current. If the monitored speed is less than the rated speed and occurs multiple times within 30 minutes, or if the speed is lower than the set speed for a long time, the PLC system controls the feeding solenoid valve to stop feeding. The worker checks the cause of the abnormal speed and handles it in time. At the same time, the drive source 5 drives the trolley 4 to move to the position of proximity switch 7, the centrifuge stops, and the flushing water valve is unlocked to flush the drum.

[0026] In one embodiment, the pusher count detection device 11 detects the pusher count of the equipment in real time. When the pusher count changes to be higher or lower than the normal range, the pusher count is compared within 5 minutes. If the pusher count still deviates from the normal range, the machine needs to be stopped to check the cause of the pusher count change. The PLC system controls the feed solenoid valve to stop feeding. The PLC system controls the drive source 5 to drive the cart 4 to move to the position of proximity switch 7, and at the same time controls the flushing water valve to unlock and flush. The feeding frequency detection device 11 detects the feeding frequency of the equipment. When the feeding frequency changes, it will affect the separation effect of the material. It is necessary to stop feeding in time, stop the machine to check the cause and flush. After the centrifuge starts, the PLC system automatically starts timing the centrifuge running time. When the centrifuge running time reaches the set time, the PLC system controls the feeding solenoid valve to stop feeding, and the PLC system controls the drive source 5 to drive the trolley 4 to the position of proximity switch 2 7. At the same time, the PLC system controls the flushing water valve to unlock and flush. After flushing is completed, the PLC system controls the drive source 5 to drive the trolley 4 to the position of proximity switch 1 6, and at the same time controls the feeding solenoid valve to unlock and start feeding.

[0027] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A centrifuge rinse control method, characterized by, The control method is as follows: After the centrifuge is started, the PLC system is self-checked, and the proximity switch one senses the position of the trolley. If no trolley is sensed, the electric push rod is controlled to move the trolley to the position of the proximity switch one. After the trolley is in place, the feeding electromagnetic valve is opened to feed; The oil pump motor and the main motor current detection module monitor the current changes in real time. If the current of the oil pump motor and the main motor exceeds the rated value, the circuit condition and whether there is an abnormal condition in the centrifuge need to be checked. The PLC system controls the feeding electromagnetic valve to stop feeding, and controls the trolley to move to the position of the proximity switch two. After the proximity switch two senses the trolley, an instruction is sent. The PLC system controls the flushing water valve to unlock flushing. The vibration sensor monitors the equipment vibration value in real time. If the equipment vibration value is greater than the threshold value, and the vibration value is still greater than the threshold value after the vibration value detection delay time is set, or if the vibration value is greater than 1 times and above the threshold value, the feeding is immediately stopped, the equipment vibration reason needs to be checked, the PLC system controls the feeding electromagnetic valve to stop feeding, and controls the trolley to move to the position of the proximity switch two. After the proximity switch two senses the trolley, an instruction is sent. The PLC system controls the flushing water valve to unlock flushing. The oil cylinder rotation speed detection proximity switch generates alternating current when the oil cylinder rotates. The oil cylinder rotation speed, i.e. the rotation speed of the drum, is calculated according to the alternating current. If the rotation speed monitoring is less than the rated rotation speed for a long time, or less than the rated rotation speed for multiple times within the set time, the PLC system controls the feeding electromagnetic valve to stop feeding, and controls the trolley to move to the position of the proximity switch two. The flushing water valve is unlocked to flush the drum. After flushing is completed, the machine is stopped to check the reason for the decrease in rotation speed. The trolley is moved to the position of the proximity switch two. After the proximity switch two senses the trolley, an instruction is sent. The PLC system controls the flushing water valve to unlock flushing.

2. A centrifuge rinse control method as claimed in claim 1, wherein: If the proximity switch two does not detect the trolley within the set time, an alarm is sent, and manual intervention is required for checking.

3. The centrifuge rinse control method of claim 1, wherein: To achieve good separation effect, regular flushing is required. The flushing time interval is different for different materials to ensure separation efficiency, but flushing must be performed once every 8 hours. After a certain working time, the PLC system controls the feeding electromagnetic valve to stop feeding, and controls the trolley to move to the position of the proximity switch two. After the proximity switch two senses the trolley, an instruction is sent. The PLC system controls the flushing water valve to unlock flushing.

4. A rinse water collection device for use in a centrifuge rinse control method according to any one of claims 1 to 3, characterised in that: The fixed box body (1) connected with the centrifuge, the flushing water collection and discharge groove (2) and the guide rail (3) installed on the fixed box body (1), the trolley (4) slidably installed on the guide rail (3), and the driving source (5) driving the trolley (4) to move are included. The fixed box body (1) is further provided with the proximity switch one (6) and the proximity switch two (7) for sensing the position of the trolley (4).

5. The rinse water collection device of a centrifuge rinse control method according to claim 4, wherein: The trolley (4) comprises a water collecting tank (401), a baffle (402) mounted on the water collecting tank (401), a fixing hook (403) connected with a driving source (5), a plurality of guide rods (404) mounted on the bottom of the water collecting tank (401), a plurality of rollers (405) mounted on the guide rods (404), and a plurality of water discharge ports (406) arranged on the water collecting tank (401).

6. The rinse water collection device of a centrifuge rinse control method according to claim 5, wherein: The water collecting tank (401) is further provided with a shunt buffer net (407) for shunting the washing water and an inclined guide plate (408) for guiding the washing water.

7. The rinse water collection device of a centrifuge rinse control method according to claim 5, wherein: The baffle (402) is further provided with a clear rail block (409) for clearly guiding the material on the rail (3).

8. The rinse water collection device of a centrifuge rinse control method according to claim 4, wherein: The washing water collecting and discharging groove (2) is further provided with a concentrated water discharge port (410).

9. The rinse water collection device of a centrifuge rinse control method according to claim 4, wherein: The driving source (5) can be one of an electric push rod, an air cylinder or a hydraulic cylinder.

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