A kind of automatic inspection and fault monitoring device for bag-type dust collector gas pocket pulse valve

Abstract

The utility model relates to bag type dust collector technical field, and disclose a kind of bag type dust collector gas pocket pulse valve automatic patrol and fault monitoring device, the device includes pressure sensor, gas pocket, pressure reducing valve, multiple pulse valves and remote terminal unit, the pressure sensor is connected on the gas pocket or on the gas inlet pipeline close to the gas pocket;The pressure reducing valve is connected on the gas inlet pipeline of the gas pocket;Multiple pulse valves are connected on gas pocket;The start-stop signal of multiple pulse valves is accessed remote terminal unit.Compared with prior art, the device can replace patrol worker to carry out all-weather remote online automatic patrol, and can accurately alarm and identify the specific sequence number pulse valve sudden failure and fault type, improve and enhance the working mode and work efficiency of dust collector equipment routine patrol, maintenance etc., reduce artificial patrol cost, avoid the occurrence of bag type dust collector equipment with disease operation, fill the technical blank of bag type dust collector operation intelligent detail management.

Description

Technical Field

[0001] This utility model relates to the field of bag filter technology, and more specifically, to an automatic inspection and fault monitoring device for the air bag pulse valve of a bag filter. Background Technology

[0002] One of the prerequisites for the smooth operation of medium and large baghouse dust collectors is the continuous, healthy, and stable operation of the multiple pulse valves on the air tank. Pulse valve malfunctions generally fall into two categories: electrical component failures, such as damaged energizing coils, and mechanical component failures, such as jammed or broken internal diaphragm components. If a pulse valve on the air tank suddenly malfunctions during baghouse dust collector operation, and the fault is not promptly detected, investigated, and repaired or replaced, the dust adsorbed on the surface of the corresponding row of filter bags will not be thoroughly or completely removed by the pulse vibration. The dust will continue to accumulate on the surface of the filter bags, while the exhaust fan continues to draw air, increasing the operating resistance of the dust collector and potentially damaging the filter bags due to the fan's suction (blowing), easily leading to dust collector malfunction.

[0003] Medium and large-sized dust collectors are generally located in open areas, away from workers' line of sight. These dust collectors contain a large number of air chambers and pulse valves. Taking a baghouse electrostatic precipitator in a domestic thermal power plant as an example, this system has 32 air chambers, each with 16 pulse valves, totaling 512 pulse valves. Excluding approximately one month of downtime for maintenance, it operates continuously 24 hours a day. If each pulse valve blows and vibrates the filter bag every 8 seconds, the theoretical time required for all pulse valves to complete one cycle is 8 seconds x 512 / 3600 seconds = 1.14 hours. Relying solely on visual inspection and listening to the pulse valves' blowing sounds, and then checking each valve individually for proper functioning, is extremely time-consuming and labor-intensive for inspectors. This method of periodic manual inspection is also prone to oversights. Furthermore, when a pulse valve suddenly malfunctions, it is difficult for inspectors to quickly identify which valve number is faulty and the type of malfunction.

[0004] Currently, most bag filters in operation are inspected manually on a regular basis. This means that it is impossible to inspect all the pulses on the air tank of the bag filter around the clock. Manual inspection is also prone to omissions, low work efficiency, and high labor costs.

[0005] The existing technology is that baghouse dust collectors are conventionally equipped with only one differential pressure sensor. Conventional control can only roughly determine whether there are abnormal air leakage differential pressure changes in the entire structural unit of the air tank and the multiple pulse valves connected together. It is impossible to accurately identify which pulse valve has suddenly failed and the type of failure.

[0006] This device is applicable to multiple pulse valves on the air tank of a bag filter. It can replace manual inspection workers for remote, 24 / 7 online automatic inspection, and accurately alarm and identify the sudden failure and type of a specific pulse valve. It improves the working methods and efficiency of daily inspection and maintenance of dust collector equipment, reduces manual inspection costs, avoids the operation of bag filter equipment with defects, and fills the technical gap in intelligent operation and detailed management of bag filter equipment. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, this utility model provides an automatic inspection and fault monitoring device for the pulse valve of the air bag of a bag dust collector, which has the advantages of accurate fault identification and all-weather inspection.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an automatic inspection and fault monitoring device for the pulse valve of the air tank of a bag filter. The device includes a pressure sensor, an air tank, a pressure reducing valve, multiple pulse valves, and a remote terminal unit. The pressure sensor is connected to the air tank or to the air inlet pipe near the air tank; the pressure reducing valve is connected to the air inlet pipe of the air tank; the multiple pulse valves are connected to the air tank; and the start / stop signals of the multiple pulse valves are connected to the remote terminal unit.

[0009] As a preferred technical solution of this utility model, the remote terminal unit has the functions of remote data acquisition, communication and control of the end actuator, and its composition is not limited to PLC, microcontroller programmer, and computer equipment.

[0010] As a preferred embodiment of this utility model, the pressure reducing valve pre-sets a working pressure value for the air tank; the pressure sensor outputs the detected pressure signal inside the air tank to the remote terminal unit.

[0011] As a preferred technical solution of this utility model, the remote terminal unit controls and programs the multiple pulse valves to arrange their working sequence numbers, replacing the sorting function of multiple pulse valves in the prior art of the pulse controller; As a preferred technical solution of this utility model, the remote terminal unit control programming diagnoses whether there is a fault and the type of fault in the multiple pulse valves according to the dynamic pressure change in the air tank, and the diagnosis is divided into two categories.

[0012] As a preferred technical solution of this utility model, the first diagnosis is: when the multiple pulse valves do not experience any pressure drop within the corresponding air tank during each pulse amplitude and duration, the device automatically outputs a feedback signal indicating that the pulse valve of that sequence number has experienced an electrical fault.

[0013] As a preferred technical solution of this utility model, the second diagnosis is: when the multiple pulse valves fail to pressurize to the working pressure in the corresponding air tank within the pulse interval time, the device automatically outputs a feedback signal that the pulse valve of that number has experienced a mechanical failure.

[0014] As a preferred embodiment of this invention, when the multiple pulse valves are working normally, this device does not output a fault signal.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model transmits the pressure signal inside the air tank to a remote terminal unit via a pressure sensor. The remote terminal unit then performs remote online automatic inspection and fault monitoring alarms on multiple pulse valves on the air tank in sequence according to their serial numbers. Compared with existing technologies, this invention can replace manual inspection workers in performing all-weather remote online automatic inspections of multiple pulse valves. It can also accurately identify and diagnose the sudden fault and fault type of a specific pulse valve. This avoids problems such as failure to detect sudden faults of specific pulse valves, failure to quickly troubleshoot the fault type, and failure to replace faulty pulse valve components due to oversights by regular inspection workers, which can lead to the baghouse dust collector operating with defects. This invention greatly improves the working methods and efficiency of daily inspection and maintenance of dust collector equipment, reduces manual inspection costs, and prevents the baghouse dust collector from operating with defects, filling the technical gap in the intelligent operation and detailed management of baghouse dust collectors. 2. This utility model can simultaneously perform all-weather remote automatic inspection and fault monitoring and alarm on multiple air tanks and multiple pulse valves on multiple sets of bag dust collectors, which is highly efficient and low cost. 3. This utility model can be upgraded simply by adding a remote terminal unit and connecting materials to the conventional air jetting manifold. It can be used for the production of new products as well as for the upgrading and transformation of existing equipment, and has high promotional value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the automatic inspection and fault monitoring principle of this utility model; Figure 2 This is a schematic diagram illustrating the principle of automatic inspection and fault monitoring of this utility model. Figure 1 ; Figure 3 This is a schematic diagram illustrating the principle of automatic inspection and fault monitoring of this utility model. Figure 2 .

[0017] In the diagram: 1. Pressure sensor; 2. Air reservoir; 3. Pressure reducing valve; 4. Multiple pulse valves; 5. Remote terminal unit; 6. Pulse amplitude; 7. Pulse interval; 8. Electrical fault signal; 9. Mechanical fault signal. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 3 As shown, this utility model provides an automatic inspection and fault monitoring device for the pulse valve of the air tank of a bag filter. The device includes a pressure sensor 1, an air tank 2, a pressure reducing valve 3, multiple pulse valves 4, and a remote terminal unit 5. The pressure sensor 1 is connected to the air tank 2 or to the air inlet pipe near the air tank 2; the pressure reducing valve 3 is connected to the air inlet pipe of the air tank 2; the multiple pulse valves 4 are connected to the air tank 2; and the start and stop signals of the multiple pulse valves 4 are connected to the remote terminal unit 5.

[0020] Among them, the remote terminal unit 5 has the functions of remote data acquisition, communication and control of the end actuator, and its composition is not limited to PLC, microcontroller programmer, computer equipment.

[0021] The pressure reducing valve 3 pre-sets the working pressure value for the air tank 2; the pressure sensor 1 outputs the detected pressure signal inside the air tank 2 to the remote terminal unit 5.

[0022] Among them, the remote terminal unit 5 controls and programs the multiple pulse valves 4 to arrange their working sequence numbers, replacing the sorting function of multiple pulse valves in the existing technology of the pulse controller; Among them, the remote terminal unit 5 controls the programming to diagnose whether there is a fault and the type of fault according to the dynamic pressure change in the air tank 2 and the corresponding multiple pulse valves 4 in sequence. The diagnosis is divided into two categories.

[0023] Diagnosis 1: When multiple pulse valves 4 do not experience any pressure drop within the corresponding air tank 2 during the pulse amplitude and duration, this device will automatically output a feedback signal indicating that the pulse valve of that sequence number has experienced an electrical fault.

[0024] Diagnosis 2: When multiple pulse valves 4 fail to reach the working pressure within the corresponding air tank 2 within the pulse interval, this device automatically outputs a feedback signal indicating that the pulse valve of that sequence number has experienced a mechanical failure.

[0025] When multiple pulse valves 4 are working normally, this device does not output a fault signal.

[0026] Control Principles 1) Pre-adjust the working pressure of the air tank using a pressure reducing valve, such as approximately 0.45 MPa; 2) Set the pulse amplitude and duration for multiple pulse valves, such as approximately 300 milliseconds; 3) Set the interval for multiple pulse valves, such as approximately 6 seconds; 4) The start / stop circuits of multiple pulse valves are connected to the remote terminal unit; 5) The remote terminal unit defines working sequence numbers for multiple pulse valves, such as: 1, 2, 3, ..., n; 6) The pressure sensor will output the detected pressure signal (0-24mA) inside the air tank to the remote terminal unit; 7) Remote automatic inspection and monitoring for fault diagnosis; If the pressure inside the air tank does not decrease by more than 1% within the energizing time (pulse amplitude) of any "nth sequence" pulse valve, the device will automatically determine and output a feedback signal indicating that the energizing coil of the "nth sequence" pulse valve on the air tank has malfunctioned.

[0027] If the air tank fails to rapidly increase its pressure to the preset working pressure of 0.45MPa within the de-energization period (pulse interval) of any "nth sequence" pulse valve, the device will automatically determine and output a feedback signal indicating that the "nth sequence" pulse valve on the air tank has experienced a mechanical leakage fault.

[0028] Once the equipment operator receives the feedback signal of pulse valve failure remotely, they can promptly notify maintenance personnel to bring the correct parts to the equipment site for repair and replacement of the pulse valve, so that the dust collector can quickly return to normal operation.

[0029] Working principle and usage process of this utility model: During the operation of the bag filter, the pressure reducing valve 3 pre-sets the working pressure value for the air tank 2. The remote terminal unit 5 controls and programs multiple pulse valves 4 to arrange their working sequence numbers, replacing the existing pulse controller's sorting function. Simultaneously, the remote terminal unit controls and programs the pulse valves 4 according to the dynamic pressure changes within the air tank 2, sequentially diagnosing whether they are faulty and identifying the type of fault: if there is no pressure drop within the air tank 2 for each pulse width of 6 hours, the device automatically outputs an electrical fault signal 8 indicating that the pulse valve 4 has an electrical fault; if the air tank 2 does not rise to the set working pressure within each pulse interval of 7 hours, the device automatically outputs an electrical fault signal 9 indicating that the pulse valve 4 has an electrical fault; when the pulse valve 4 is working normally, the device does not output a fault signal.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter, characterized in that: The device includes a pressure sensor (1), an air tank (2), a pressure reducing valve (3), multiple pulse valves (4), and a remote terminal unit (5). The pressure sensor (1) is connected to the air tank (2) or to the air inlet pipe near the air tank (2). The pressure reducing valve (3) is connected to the air inlet pipe of the air tank (2). The multiple pulse valves (4) are connected to the air tank (2). The start and stop signals of the multiple pulse valves (4) are connected to the remote terminal unit (5).

2. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 1, characterized in that: The remote terminal unit (5) has a remote data acquisition, communication and control end-effector, and its composition is not limited to PLC, microcontroller programmer, computer equipment.

3. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 1, characterized in that: The working pressure value of the air tank (2) is set in advance by the pressure reducing valve (3); the pressure sensor (1) outputs the pressure signal detected in the air tank (2) to the remote terminal unit (5).

4. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 1, characterized in that: The remote terminal unit (5) controls and programs the multiple pulse valves (4) to arrange their working sequence numbers, replacing the sorting function of the pulse controller for multiple pulse valves (4) in the prior art.

5. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 1, characterized in that: The remote terminal unit (5) controls the programming to diagnose whether there is a fault and the type of fault according to the dynamic pressure change in the air tank (2) and the multiple pulse valves (4) in sequence. The diagnosis results are divided into two types.

6. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 4, characterized in that: Diagnosis Result 1: When the multiple pulse valves (4) do not have a pressure drop within the pulse amplitude and duration and the corresponding air bag (2), this device automatically outputs a feedback signal indicating that the corresponding pulse valve has an electrical fault.

7. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 4, characterized in that: Diagnosis Result 2: When the multiple pulse valves (4) fail to pressurize to the working pressure within the pulse interval and the corresponding air tank (2) each time, the device automatically outputs a feedback signal indicating that the corresponding pulse valve has experienced a mechanical failure.

8. The automatic inspection and fault monitoring device for the pulse valve of the air chamber of a bag filter according to claim 1, characterized in that: When the multiple pulse valves (4) are working normally, this device does not output a fault signal.

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