A sludge screw conveyor with fault alarm function

Abstract

This utility model discloses a sludge screw conveyor with a fault alarm function, comprising: an auger silo with a feed inlet at its front end and a discharge outlet at its rear end; a screw blade rotatably installed inside the auger silo; and a drive mechanism for driving the screw blade to rotate, disposed on the outside of the auger silo and connected to the rear end of the screw blade; further comprising: a proximity switch disposed on the inner cylinder surface at the front end of the auger silo and near the front end of the screw blade for detecting the rotation state of the screw blade; and a PLC controller, which is connected to the proximity switch on one side and to a central control system on the other. This utility model solves the problem of centrifuge cascading failures caused by sludge accumulation, improving fault response speed and equipment operation continuity.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment equipment technology, and in particular to a sludge screw conveyor with fault alarm function. Background Technology

[0002] Currently, fault alarms for sludge screw conveyors mostly rely on motor current monitoring or mechanical overload protection devices. Motor current monitoring uses a current sensor to monitor the motor load; when the current exceeds a threshold, it triggers power-off protection. Mechanical overload protection devices use a torque sensor installed on the drive shaft to detect changes in shaft torque in real time, and then use a PLC to provide early warning. However, existing technologies have several shortcomings:

[0003] 1. Response lag. Current monitoring only triggers after the motor is actually stalled, and cannot detect idle running caused by a disconnected drive shaft;

[0004] 2. Detection blind zone. The torque sensor is not sensitive to the gradual resistance generated in the initial stage of centrifugation, and the protection action lags behind the occurrence of the fault;

[0005] 3. Risk of misoperation. Mechanical clutches are prone to wear during frequent starts and stops, requiring manual reset and affecting continuous production.

[0006] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a sludge screw conveyor with fault alarm function to address the shortcomings of the existing technology.

[0008] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0009] A sludge screw conveyor with fault alarm function includes:

[0010] A screw conveyor silo, wherein a feed inlet is provided at the front end of the screw conveyor silo and a discharge outlet is provided at the rear end;

[0011] Rotary spiral blades installed inside the auger silo; and

[0012] A drive mechanism for driving the spiral blades to rotate, disposed outside the auger silo and connected to the rear end of the spiral blades; further comprising:

[0013] A proximity switch for detecting the rotational state of the spiral blades is disposed on the inner cylinder surface at the front end of the auger silo and near the front end of the spiral blades; and

[0014] The PLC controller is connected to the proximity switch on one hand to acquire the helical blade rotation signal collected by the proximity switch and analyze and process the helical blade rotation signal on the other hand, and is connected to the central control system to send the analysis and processing results to the central control system.

[0015] In a preferred embodiment of this utility model, the straight-line distance between the proximity switch and the outer edge of the spiral blade is 10mm to 20mm.

[0016] In a preferred embodiment of this utility model, the proximity switch is a magnetic induction proximity switch.

[0017] In a preferred embodiment of the present invention, an alarm indicator light is further included, which is mounted on the mounting bracket of the screw conveyor silo and connected to the PLC controller.

[0018] In a preferred embodiment of this utility model, the straight-line distance between the alarm indicator light and the outer cylinder surface of the auger silo is 80mm to 120mm.

[0019] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model monitors the rotation status of the spiral blades in real time through proximity switches, and combines it with PLC controller interlocking control to quickly identify shaft breakage or stall faults, trigger alarms and link to shutdown, solving the centrifuge cascading faults caused by sludge accumulation, improving fault response speed and equipment operation continuity. It has the following advantages:

[0020] 1. Rapid fault identification: Quickly identifies shaft breakage or stall faults, significantly shortening fault response time by approximately 90% compared to traditional detection methods, thus improving fault handling efficiency;

[0021] 2. Enhanced equipment operational stability: Prevents centrifuge cascading failures caused by sludge accumulation, improves equipment operational continuity, and ensures smooth production processes;

[0022] 3. Reduced maintenance costs: Accurate fault identification reduces unnecessary disassembly and repair, and equipment maintenance costs are expected to be reduced by more than 60%, while extending the service life of the equipment;

[0023] 4. Savings in labor costs: The system automatically monitors and alarms, reducing the frequency of manual inspections and shortening equipment inspection time by 50%, thus optimizing the allocation of human resources and saving labor costs.

[0024] 5. Significant environmental benefits: Improves sludge treatment efficiency, reduces the probability of sludge leakage by 80%, effectively solves the problem of secondary pollution risk, and meets environmental protection requirements;

[0025] 6. Safety in production: Effectively reduces the frequency of employees working at heights, avoids safety accidents caused by abnormal equipment operation, effectively improves the stability of production safety, and promotes the inherent safety level of the enterprise. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the electrical connection structure of this utility model. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0030] See Figure 1 and Figure 2 The figure shows a sludge screw conveyor with fault alarm function, including screw silo 100, screw blades 200, drive mechanism 300, proximity switch 400, alarm indicator light 500 and PLC controller 600.

[0031] The screw conveyor silo 100 is inclined and positioned at a high location via a mounting bracket 110. A feed inlet 120 is located above its front end, and a discharge outlet 130 is located below its rear end.

[0032] The helical blade 200 is rotatably installed inside the auger silo 100 via a rotating bearing, and the rear end of the helical blade 200 extends backward after passing through the auger silo 100.

[0033] The drive mechanism 300 is located on the outside of the auger silo 100 and connected to the rear end of the spiral blade 200, and is used to drive the spiral blade 200 to rotate. In this embodiment, the drive mechanism 300 is a drive motor.

[0034] The proximity switch 400 is located on the inner surface of the front end of the auger silo 100, near the front end of the spiral blade 200, and is used to detect the rotational state of the spiral blade 200. Since the drive mechanism 300 is installed on the outer rear end of the auger silo 100, placing the proximity switch 400 at the front end of the auger silo 100 is necessary to monitor the entire transmission state of the spiral blade 200. If the proximity switch 400 is installed at the rear end of the auger silo 100, if the spiral blade 200 breaks in the middle, the end of the spiral blade 200 will still rotate normally, and the proximity switch 400 cannot determine whether the front end of the spiral blade 200 is operating normally.

[0035] The linear distance between the proximity switch 400 and the outer edge of the spiral blade 200 is 10mm to 20mm, perpendicular to the plane of the spiral blade 200's rotation trajectory, and as close as possible to the outer edge of the spiral blade 200 to improve detection accuracy while avoiding direct contact. In this embodiment, the proximity switch 400 is preferably a magnetic induction proximity switch. During the operation of the sludge screw conveyor, the spiral blade 200 rotates, and the proximity switch 400 triggers a signal after sensing the spokes of the spiral blade 200.

[0036] The alarm indicator light 500 is installed on the mounting bracket 110 of the auger silo 100. The straight-line distance between the alarm indicator light 500 and the outer surface of the auger silo 100 is 80mm to 120mm. It is used to provide an alarm through flashing lights, sound, etc., to promptly remind the operator.

[0037] The PLC controller 600 is connected to the proximity switch 400 and the alarm indicator 500 respectively. It is used to acquire the helical blade rotation signal collected by the proximity switch 400, analyze and process the helical blade rotation signal, and control the alarm indicator 500 to work. On the other hand, it is connected to the central control system to send the analysis and processing results to the central control system.

[0038] The working principle of the sludge screw conveyor with fault alarm function of this utility model is as follows:

[0039] Within 5 seconds of the drive mechanism 300 starting, the spiral blade 200 rotates. The proximity switch 400 transmits the detected periodic spiral blade rotation signal to the PLC controller 600. The PLC controller 600 analyzes and processes the spiral blade rotation signal. If it determines that the rotation is normal, no alarm output is generated, and the alarm indicator light 500 will not flash. When the bearing breaks or the spiral blade 200 malfunctions, the proximity switch 400 does not detect the rotation of the spiral blade 200. The PLC controller 600 determines this as a fault and controls the alarm indicator light 500 to flash. Simultaneously, it transmits the alarm signal to the central control system to remind the operator to perform timely maintenance.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sludge screw conveyor with fault alarm function, comprising: A screw conveyor silo, wherein a feed inlet is provided at the front end of the screw conveyor silo and a discharge outlet is provided at the rear end; Rotate the spiral blades installed inside the auger silo; as well as A drive mechanism for driving the spiral blades to rotate, disposed outside the auger silo and connected to the rear end of the spiral blades; characterized in that it further comprises: A proximity switch for detecting the rotational state of the spiral blades is disposed on the inner cylinder surface at the front end of the auger silo and near the front end of the spiral blades; and The PLC controller is connected to the proximity switch on one hand to acquire the helical blade rotation signal collected by the proximity switch and analyze and process the helical blade rotation signal on the other hand, and is connected to the central control system to send the analysis and processing results to the central control system.

2. The sludge screw conveyor with a malfunction alarm function according to claim 1, characterized by, The linear distance between the proximity switch and the outer edge of the spiral blade is 10mm to 20mm.

3. The sludge screw conveyor with a malfunction alarm function according to claim 1, wherein The proximity switch is a magnetic induction proximity switch.

4. The sludge screw conveyor with a malfunction alarm function according to claim 1, wherein It also includes an alarm indicator light that is mounted on the mounting bracket of the screw conveyor silo and connected to the PLC controller.

5. The sludge screw conveyor with fault alarm function as described in claim 4, characterized in that, The straight-line distance between the alarm indicator light and the outer surface of the screw conveyor silo is 80mm to 120mm.

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