A safety monitoring system for electric hydraulic brakes of lifting machinery

Abstract

The present invention relates to a safety monitoring system for an electric hydraulic brake of a lifting machinery, and belongs to the technical field of safety monitoring for lifting machinery. A safety monitoring system is provided in the electric hydraulic brake, and the safety monitoring system includes a pressure monitoring device, a displacement monitoring device, a monitoring control device, and a monitoring alarm device; the pressure monitoring device is connected to the monitoring alarm device via a monitoring control device; and the displacement monitoring device is connected to the monitoring alarm device via a monitoring control device. The safety monitoring system and method for the electric hydraulic brake of a lifting machinery provided by the present invention perform real-time safety monitoring of the working state of the electric hydraulic brake of the lifting machinery, and promptly detect faults such as excessive or insufficient braking force, insufficient thrust of the electric hydraulic pusher, etc., to ensure the safe use of the lifting machinery.

Description

Technical Field

[0001] The invention relates to a safety monitoring system for an electric hydraulic brake of a lifting machinery, belonging to the technical field of safety monitoring of lifting machinery. Background Art

[0002] Electric hydraulic brakes are widely used braking devices on special equipment such as lifting machinery. Common faults include excessive or insufficient braking force, insufficient thrust of the electric hydraulic pusher, etc. At present, the above faults can only be judged by technicians based on their experience through daily observation of phenomena such as the lifting mechanism slipping hook, the operating mechanism sliding, the brake impact, and the pusher not moving. If the fault is not discovered and eliminated in time, it is very easy to cause brake failure, and then lead to a lifting machinery accident. Therefore, there is a need in this technical field for a system that can safely monitor the working status of the electric hydraulic brake of the lifting machinery. The system can promptly detect faults such as excessive or insufficient braking force, insufficient thrust of the electric hydraulic pusher, etc., thereby avoiding the occurrence of safety accidents of lifting equipment and ensuring the safe use of lifting machinery. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problem of how to safely monitor the working state of the electric hydraulic brake of a lifting machinery, discover faults in time, and avoid the occurrence of safety accidents of the lifting machinery.

[0004] In order to achieve the purpose of solving the above-mentioned problems, the technical solution adopted by the present invention is to provide a safety monitoring system for the electric hydraulic brake of a lifting machinery, wherein the electric hydraulic brake includes an electric hydraulic pusher and a brake spring mechanism; a brake spring mechanism is provided adjacent to the electric hydraulic pusher, and a push rod 1 is provided in the electric hydraulic pusher, and the push rod 1 is connected to the push rod 2 provided in the brake spring mechanism through a connecting rod mechanism; a safety monitoring system is provided in the electric hydraulic brake, and the safety monitoring system includes a pressure monitoring device, a displacement monitoring device, a monitoring control device and a monitoring alarm device; the pressure monitoring device is connected to the monitoring alarm device through the monitoring control device; the displacement monitoring device is connected to the monitoring alarm device through the monitoring control device.

[0005] Preferably, the high-pressure chamber of the electric hydraulic pusher is provided with a pressure monitoring device for real-time monitoring of the hydraulic oil pressure.

[0006] Preferably, a displacement monitoring device for real-time monitoring of the displacement of the push rod is provided at a maximum stroke position and a minimum stroke position of the push rod of the electric hydraulic pusher.

[0007] Preferably, the monitoring and control device is provided with a processor for receiving signals transmitted by the pressure monitoring device and the displacement monitoring device, analyzing and judging the state of the electric hydraulic brake, and sending the state information to the monitoring and alarm device.

[0008] Preferably, the monitoring and alarm device is provided with a processing system for receiving the electric hydraulic brake status information sent by the monitoring and control device and sending it to the equipment management personnel, the brake maintenance unit mobile terminal or the lifting machinery operator display terminal.

[0009] The present invention provides a method for using a safety monitoring system for an electric hydraulic brake of a lifting machinery, comprising the following steps:

[0010] Step 1: Connect the monitoring control device and the brake;

[0011] Step 2: monitoring the pressure P value detected by the pressure monitoring device;

[0012] Step 3: Monitor the position of the push rod measured by the displacement monitoring device;

[0013] Step 4: Fault diagnosis: The monitoring control device receives a brake release signal. If the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a thrust shortage fault; if the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force shortage fault;

[0014] The monitoring and control device receives a brake release signal. If the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a jam or the brake spring has an excessive braking force fault; if the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring with an excessive braking force fault;

[0015] The monitoring and control device receives a brake closing signal. If the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force insufficient fault; if the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a jam or a brake spring braking force seriously insufficient fault;

[0016] The monitoring and control device receives the brake closing signal. If the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring excessive braking force fault; if the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring excessive braking force and the pusher return oil channel is blocked.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a safety monitoring system and method for the electric hydraulic brake of a lifting machinery, which can monitor the working status of the electric hydraulic brake of the lifting machinery, timely detect faults such as excessive or insufficient braking force, insufficient thrust of the electric hydraulic pusher, etc., and ensure the safe use of the lifting machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the electric hydraulic brake of the present invention.

[0020] Figure 2 This is a working principle diagram of the safety monitoring system of the present invention.

[0021] Reference numerals: 1. Electric hydraulic pusher; 2. Pressure monitoring device; 3. Displacement monitoring device; 4. Brake spring mechanism; 5. Connecting rod mechanism; DETAILED DESCRIPTION

[0022] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0023] like Figure 1-2 As shown, the present invention provides a safety monitoring system for an electric hydraulic brake of a lifting machinery. The electric hydraulic brake includes an electric hydraulic actuator 1 and a brake spring mechanism 4. The brake spring mechanism 4 is located adjacent to the electric hydraulic actuator 1. The electric hydraulic actuator 1 includes a push rod 1, which is connected to a push rod 2 located in the brake spring mechanism 4 via a connecting rod mechanism 5. The electric hydraulic brake is provided with a safety monitoring system comprising a pressure monitoring device 2, a displacement monitoring device 3, a monitoring control device, and a monitoring alarm device. The pressure monitoring device 2 is connected to the monitoring alarm device via the monitoring control device, and the displacement monitoring device 3 is connected to the monitoring alarm device via the monitoring control device. The pressure monitoring device 2 is provided in the high-pressure chamber of the electric hydraulic actuator 1 for real-time monitoring of hydraulic oil pressure. The displacement monitoring device 3 is provided at the maximum and minimum travel positions of the push rod 1 of the electric hydraulic actuator 1 for real-time monitoring of push rod displacement. The monitoring control device includes a processor that receives signals transmitted by the pressure monitoring device 2 and the displacement monitoring device 1, analyzes and determines the status of the electric hydraulic brake, and transmits the status information to the monitoring alarm device. The monitoring and alarm device is provided with a processing system for receiving the electric hydraulic brake status information sent by the monitoring and control device and sending it to the equipment management personnel, the brake maintenance unit mobile terminal or the lifting machinery operator display terminal.

[0024] The present invention provides a method for using a safety monitoring system for an electric hydraulic brake of a lifting machinery.

[0025] 1: The monitoring and control device receives the brake release signal. If the pressure monitored by the pressure monitoring device Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a thrust shortage fault; if the pressure monitored by the pressure monitoring device Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force shortage fault;

[0026] 2: The monitoring and control device receives the brake release signal. If the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher is stuck or the brake spring has an excessive braking force fault; if the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has an excessive braking force fault;

[0027] 3: The monitoring and control device receives the brake closing signal. If the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force insufficient fault; if the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a jam or a brake spring braking force seriously insufficient fault;

[0028] 4: The monitoring and control device receives the brake closing signal. If the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force excessive fault; if the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force excessive and the pusher return oil channel is blocked.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the scope of protection of the present invention. Any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the spirit and scope of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for using a safety monitoring system for an electric hydraulic brake of a lifting machinery, wherein the electric hydraulic brake comprises an electric hydraulic actuator and a brake spring mechanism; the brake spring mechanism is disposed adjacent to the electric hydraulic actuator, the electric hydraulic actuator is provided with a first push rod, the first push rod being connected to a second push rod disposed in the brake spring mechanism via a connecting rod mechanism; the electric hydraulic brake is provided with a safety monitoring system, characterized in that: The safety monitoring system includes a pressure monitoring device, a displacement monitoring device, a monitoring control device and a monitoring alarm device; the pressure monitoring device is connected to the monitoring alarm device through the monitoring control device; the displacement monitoring device is connected to the monitoring alarm device through the monitoring control device; The electric hydraulic pusher is provided with a high-pressure chamber provided with a pressure monitoring device for real-time monitoring of the hydraulic oil pressure, and the electric hydraulic pusher is provided with a displacement monitoring device for real-time monitoring of the push rod displacement at a maximum stroke position and a minimum stroke position. The monitoring and control device is provided with a processor for receiving signals transmitted by the pressure monitoring device and the displacement monitoring device, analyzing and judging the state of the electric hydraulic brake, and sending the state information to the monitoring and alarm device. The monitoring and alarm device is provided with a processing system for receiving the electric hydraulic brake state information sent by the monitoring and control device, and sending it to the equipment management personnel, the brake maintenance unit mobile terminal or the lifting machinery operator display terminal; The method for using the safety monitoring system of the hoisting machinery electric hydraulic brake comprises the following steps: Connect the monitoring control device to the brake; Monitor the pressure P value detected by the pressure monitoring device; Monitor the position of the push rod measured by the displacement monitoring device; Fault diagnosis: The monitoring and control device receives the brake release signal. If the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a thrust shortage fault; if the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force shortage fault; The monitoring and control device receives a brake release signal. If the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a jam or the brake spring has an excessive braking force fault; if the pressure monitored by the pressure monitoring device Pmeasure ≥ Pmax, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring with an excessive braking force fault; The monitoring and control device receives a brake closing signal. If the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring braking force insufficient fault; if the pressure monitored by the pressure monitoring device is Pmeasure ≤ Pmin, and the displacement monitoring device monitors that the push rod is at the maximum stroke, it is determined that the electric hydraulic pusher has a jam or a brake spring braking force seriously insufficient fault; The monitoring and control device receives the brake closing signal. If the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the minimum stroke, it is determined that the electric hydraulic pusher has a brake spring excessive braking force fault; if the pressure monitoring device monitors the pressure Pmeasure ≥ Pmax, and the displacement monitoring device monitors the push rod at the maximum stroke, it is determined that the electric hydraulic pusher has a brake spring excessive braking force and the pusher return oil channel is blocked.

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