Explosion-proof fan control system based on PLC

Abstract

The utility model relates to a PLC-based explosion-proof blower fan control system, which comprises a base and an explosion-proof blower fan, one side of the explosion-proof blower fan is connected with a PLC programming control module, and the explosion-proof blower fan is connected with the PLC programming control module through a time relay and an alarm so as to carry out intelligent control on the start and stop of the explosion-proof blower fan. The start-stop logic of the PLC programming control module comprises 12 times per hour of accident ventilation of the explosion-proof fan, 6 times per hour of normal operation and 3 times per hour of non-work; once combustible gas leakage is detected, the alarm immediately generates an alarm signal, the PLC programming control module enters an emergency mode to control the explosion-proof fan to start, and the explosion-proof fan works for not less than 12 times per hour; a user can conveniently set the starting time and the stopping time of the explosion-proof fan on the screen display and setting module; and the starting and stopping time can be accurately controlled through the time relay, so that the explosion-proof fan can quickly collect leaked gas according to the accurate time, and further diffusion of the leaked gas is avoided.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof fans, and in particular to a PLC-based explosion-proof fan control system. Background Art

[0002] Explosion-proof axial flow fans are composed of explosion-proof motors, blades, air ducts and other components. Explosion-proof fans are widely used for ventilation in general factories, warehouses, offices, and residences. Traditional explosion-proof fans not only have a single function, but also because the exhaust end is fixed, there are dead corners in the exhaust range, and the exhaust effect is poor, and they are in urgent need of improvement. Utility Model Content

[0003] The utility model aims to provide a PLC-based explosion-proof fan control system to solve the problem that the existing explosion-proof fans not only have single functions, but also have dead angles in the exhaust range and poor exhaust effect due to the fixed exhaust end.

[0004] In order to solve the above problems, the present invention provides a PLC-based explosion-proof fan control system, comprising a base and an explosion-proof fan, one side of the explosion-proof fan is electrically connected to a PLC programming control module which can give real-time warning of gas leakage and is used to control the start and stop of the explosion-proof fan, the PLC programming control module comprises a host control cabinet, a display screen module, a setting button module, a time relay module and an alarm module, the display screen module is located above the setting button module, the time relay module is located below the setting button module, the alarm module is fixed to the top wall of the host control cabinet, and the air inlet end of the explosion-proof fan is installed with an exhaust assembly with multiple degrees of freedom.

[0005] The utility model provides a PLC-based explosion-proof fan control system, which also has the following technical features:

[0006] Furthermore, a driving motor for driving the explosion-proof fan to rotate is fixedly provided on the base.

[0007] Furthermore, the exhaust assembly includes a hollow hemispherical shell movably embedded in the air inlet end of the explosion-proof fan and connected to the cavity of the explosion-proof fan, an air inlet ring frame fixed on the hollow hemispherical shell, and a plurality of hydraulic cylinders arranged around the outer wall of the hollow hemispherical shell, the telescopic end of the hydraulic cylinder is spherically hinged with the outer wall of the hollow hemispherical shell, the fixed end of the hydraulic cylinder is spherically hinged with the base, an air inlet is opened on one side of the hollow hemispherical shell, and the hydraulic cylinders are electrically connected to the PLC programming control module.

[0008] Furthermore, the intake ring frame includes an intake ring and a plurality of air guide pipes connected to the inner cavity of the intake ring, the ends of the air guide pipes away from the intake ring are inserted into the hollow hemispherical shell, and a plurality of intake covers are arranged around the outer wall of the intake ring.

[0009] Furthermore, the inner diameter of the air intake ring is larger than the inner diameter of the air intake port, and a gas sensor for detecting gas concentration is fixedly provided on the inner wall of the air intake port.

[0010] Furthermore, the air outlet end of the explosion-proof blower is connected to the gas storage cylinder through a pipeline.

[0011] Furthermore, the number of the hydraulic cylinders is at least 3.

[0012] The utility model has the following beneficial effects: the start and stop of the explosion-proof fan can be intelligently controlled by connecting the time relay, the alarm and the PLC programming control module, and the start and stop logic of the PLC programming control module mainly includes controlling the explosion-proof fan to 12 times per hour for accidental ventilation, 6 times per hour for normal operation, and 3 times per hour for non-operation; once a combustible gas leak is detected, the alarm immediately sends an alarm signal, and the PLC programming control module enters the emergency mode to control the start of the explosion-proof fan, and the explosion-proof fan works no less than 12 times per hour; the user can conveniently set the start time and stop time of the explosion-proof fan on the screen display and setting module; the start and stop time can be accurately controlled by the time relay, so that the explosion-proof fan can quickly collect the leaked gas at a precise time to avoid further diffusion of the leaked gas and cause safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the PLC-based explosion-proof fan control system. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0015] like Figure 1In one embodiment of the PLC-based explosion-proof fan control system of the utility model shown, a base 10 and an explosion-proof fan 20 are included. One side of the explosion-proof fan 20 is electrically connected to a PLC programming control module 30 for controlling the start and stop of the explosion-proof fan 20 and for real-time warning of gas leakage. The air inlet end 21 of the explosion-proof fan 20 is equipped with a multi-degree-of-freedom exhaust assembly 40. Specifically, the start and stop of the explosion-proof fan 20 can be intelligently controlled by connecting a time relay and an alarm to the PLC programming control module. The start and stop logic of the PLC programming control module 30 mainly includes controlling the accident ventilation of the explosion-proof fan 20 12 times every hour, 6 times per hour during normal operation, and 3 times per hour during non-operation; once a combustible gas leak is detected, the alarm will immediately send out an alarm signal, and the PLC programming control module 30 will enter the emergency mode to control the explosion-proof fan 20 to start, and the explosion-proof fan will work no less than 12 times per hour; the screen display and setting module can conveniently allow users to set the start time and stop time of the explosion-proof fan 20; the start and stop time can be accurately controlled by the time relay, so that the explosion-proof fan 20 can quickly collect the leaked gas at a precise time to avoid further spread of the leaked gas and cause safety accidents.

[0016] In one embodiment of the present application, a driving motor 11 for driving the explosion-proof fan 20 to rotate is fixedly provided on the base 10 .

[0017] In one embodiment of the present application, the PLC programming control module 30 includes a host control cabinet 31, a display screen module 32, a setting button module 33, a time relay module 34 and an alarm module 35. The display screen module 32 is located above the setting button module 33, the time relay module 34 is located below the setting button module 33, and the alarm module 35 is fixed to the top wall of the host control cabinet 31. Specifically, the start and stop of the explosion-proof fan 20 and the time of each work can be set through the time relay module 34 and the setting button module 33. The display screen module 32 facilitates the staff to observe the collected information parameters intuitively and clearly. The alarm module 35 can promptly remind the staff to perform maintenance when gas leaks.

[0018] In one embodiment of the present application, the exhaust assembly 40 includes a hollow hemispherical shell 41 movably embedded in the air inlet end 21 of the explosion-proof fan 20 and connected to the cavity of the explosion-proof fan 20, an air inlet ring frame 42 fixed on the hollow hemispherical shell 41, and a plurality of hydraulic cylinders 43 arranged around the outer wall of the hollow hemispherical shell 41, the telescopic end of the hydraulic cylinder 43 is spherically hinged with the outer wall of the hollow hemispherical shell 41, the fixed end of the hydraulic cylinder 41 is spherically hinged with the base 10, an air inlet 410 is opened on one side of the hollow hemispherical shell 41, and the hydraulic cylinders 41 are electrically connected to the PLC programming control module 30. Specifically, through the coordinated work of multiple hydraulic cylinders 43, the hollow hemispherical shell 41 can rotate in the air inlet end of the explosion-proof fan 20, and the hollow hemispherical shell 41 drives the air inlet ring frame 42 to swing in different directions, thereby expanding the suction range of the leaked gas and preventing the gas from further spreading.

[0019] In one embodiment of the present application, the air intake ring frame 42 includes an air intake ring 421 and multiple air guide pipes 422 connected to the inner cavity of the air intake ring 421, and the ends of the air guide pipes 422 away from the air intake ring 421 are inserted into the hollow hemispherical shell 41, and the outer wall of the air intake ring 421 is surrounded by multiple air intake covers 423.

[0020] In one embodiment of the present application, the inner diameter of the intake ring 421 is larger than the inner diameter of the air inlet 410, and a gas sensor 411 for detecting gas concentration is fixedly provided on the inner wall of the air inlet 410. Specifically, the gas concentration of the gas sucked into the air inlet 410 can be detected in real time through the gas sensor 411. Once combustible gas is detected, the gas sensor 411 immediately inputs a signal to the PLC host control cabinet 31, causing the alarm module 35 to sound a whistle to remind the staff to proceed.

[0021] In one embodiment of the present application, the air outlet end 22 of the explosion-proof fan 20 faces upward and is connected to the gas storage cylinder through a pipeline. Specifically, the combustible gas discharged from the air outlet end 22 of the explosion-proof fan 20 can be discharged into the gas storage cylinder for storage and recovery through an external pipeline.

[0022] In one embodiment of the present application, the number of the hydraulic cylinders 43 is at least three.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for their core technical features. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A PLC-based explosion-proof fan control system, characterized in that: It includes a base and an explosion-proof fan. One side of the explosion-proof fan is electrically connected to a PLC programming control module which can warn of gas leakage in real time and is used to control the start and stop of the explosion-proof fan. The PLC programming control module includes a host control cabinet, a display screen module, a setting button module, a time relay module and an alarm module. The display screen module is located above the setting button module, the time relay module is located below the setting button module, and the alarm module is fixed to the top wall of the host control cabinet. A multi-degree-of-freedom exhaust component is installed at the air inlet end of the explosion-proof fan.

2. The explosion-proof fan control system based on PLC according to claim 1 is characterized in that: A driving motor for driving the explosion-proof fan to rotate is fixedly arranged on the base.

3. The explosion-proof fan control system based on PLC according to claim 1 is characterized in that: The exhaust assembly includes a hollow hemispherical shell movably embedded in the air inlet end of the explosion-proof fan and connected to the cavity of the explosion-proof fan, an air inlet ring frame fixed on the hollow hemispherical shell, and a plurality of hydraulic cylinders arranged around the outer wall of the hollow hemispherical shell, the telescopic end of the hydraulic cylinder is spherically hinged with the outer wall of the hollow hemispherical shell, the fixed end of the hydraulic cylinder is spherically hinged with the base, an air inlet is opened on one side of the hollow hemispherical shell, and the hydraulic cylinders are electrically connected to the PLC programming control module.

4. The explosion-proof fan control system based on PLC according to claim 3 is characterized in that: The intake ring frame includes an intake ring and a plurality of air guide pipes connected to the inner cavity of the intake ring. The ends of the air guide pipes away from the intake ring are inserted into the hollow hemispherical shell. The outer wall of the intake ring is provided with a plurality of intake covers.

5. The explosion-proof fan control system based on PLC according to claim 4 is characterized in that: The inner diameter of the air intake ring is larger than the inner diameter of the air intake port, and a gas sensor for detecting gas concentration is fixedly provided on the inner wall of the air intake port.

6. The explosion-proof fan control system based on PLC according to claim 1 is characterized in that: The air outlet end of the explosion-proof blower is connected to the gas storage bottle through a pipeline.

7. The explosion-proof fan control system based on PLC according to claim 3 is characterized in that: The number of the hydraulic cylinders is at least 3.

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