Automatic anti-surge control system for oxygenation of high-speed centrifugal fan

Abstract

The utility model discloses an automatic anti-surge control system for oxygenation of a high-speed centrifugal fan, and particularly relates to the field of fan anti-surge, the automatic anti-surge control system comprises a centrifugal fan body, the input end of the centrifugal fan body is fixedly connected with an air inlet pipe, and the output end of the centrifugal fan body is fixedly connected with an exhaust pipe. When the high-speed centrifugal fan is used, frequency current is fed back through the frequency converter, pressure signals are fed back through the pressure detector, the industrial computer automatic control system detects the fed-back frequency current and pressure, and when surge occurs, the industrial computer automatic control system controls the electromagnetic valve to be opened, so that the high-speed centrifugal fan is started. And air in the connecting pipeline is exhausted through the exhaust pipe, and meanwhile, the industrial computer automatic control system closes the centrifugal fan body. Therefore, the effect of automatically detecting whether the surge phenomenon occurs or not is achieved, and when surge occurs, the gas discharging valve is automatically opened, and the high-speed centrifugal fan oxygenation control system is closed. And the high-speed centrifugal fan is prevented from being damaged due to continuous operation of the system during surge.

Description

Technical Field

[0001] The utility model relates to the technical field of fan surge prevention, in particular to an automatic surge prevention control system for high-speed centrifugal fan oxygen addition. Background Art

[0002] An automatic anti-surge control system for high-speed centrifugal fan oxygen enrichment is designed to ensure the stability and safety of the fan when running at high speed and avoid the occurrence of surge. The system monitors the operating status of the fan in real time and automatically adjusts the working parameters of the fan to prevent the occurrence of surge. It combines advanced control algorithms and sensor technology to achieve efficient and precise control of the fan.

[0003] The existing high-speed centrifugal fan oxygen enrichment control system is to visually detect the air duct pressure and fan current, and then determine whether the system has surged according to the changes in the air duct pressure and fan current; and when surge occurs, the high-speed centrifugal fan oxygen enrichment control system is manually shut down. This method has the following two problems:

[0004] (1) Visual inspection is required to determine whether the system is surging based on the changes in duct pressure and fan current. The judgment effect is poor.

[0005] (2) It is necessary to manually close the high-speed centrifugal fan oxygen control system. If the closing is slow, the high-speed centrifugal fan oxygen control system may not be closed before surge occurs. Therefore, the inventors provide a high-speed centrifugal fan oxygen automatic anti-surge control system to solve the problems raised in the above background technology. Utility Model Content

[0006] The utility model aims to provide an automatic anti-surge control system for oxygenation of a high-speed centrifugal fan, so as to achieve the effect of automatically detecting whether a surge phenomenon occurs.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A high-speed centrifugal fan oxygen increase automatic anti-surge control system includes a centrifugal fan body, an input end of the centrifugal fan body is fixedly connected to an air inlet pipe, an output end of the centrifugal fan body is fixedly connected to an exhaust pipe, the right side of the exhaust pipe is fixedly connected to a connecting pipe through a flange, the centrifugal fan body is electrically connected to a frequency converter and an industrial computer automatic control system, the industrial computer automatic control system is electrically connected to the frequency converter, a pressure detector is installed inside the connecting pipe, the bottom of the connecting pipe is fixedly connected to an exhaust pipe, and a solenoid valve is installed on the exhaust pipe; a cleaning mechanism is provided on one side of the air inlet pipe.

[0009] As a further solution of the utility model: a filter screen is fixedly connected to the inner side of the air inlet pipe.

[0010] As a further solution of the utility model: the cleaning mechanism is arranged on the outside of the filter, the cleaning mechanism includes a fixed frame fixed on the front of the air inlet pipe, and movable grooves are respectively provided on the left and right sides of the interior of the fixed frame, and the upper and lower sides of the interior of the movable groove on the left side are rotatably connected with a rotatable reciprocating screw, the surface of the reciprocating screw is threadedly connected with a moving block, and the right side of the moving block is rotatably connected with a rotatable rotating rod, and the surface of the rotating rod is fixedly connected with a cleaning cylinder brush, and the rear surface of the cleaning cylinder brush contacts the surface of the filter. The cleaning mechanism is arranged on the outside of the filter, the cleaning mechanism includes a fixed frame fixed on the front of the air inlet pipe, and movable grooves are respectively provided on the left and right sides of the interior of the fixed frame, and the upper and lower sides of the interior of the movable groove on the left side are rotatably connected with a rotatable reciprocating screw, the surface of the reciprocating screw is threadedly connected with a moving block, and the right side of the moving block is rotatably connected with a rotatable rotating rod, and the surface of the rotating rod is fixedly connected with a cleaning cylinder brush, and the rear surface of the cleaning cylinder brush contacts the surface of the filter.

[0011] As a further solution of the utility model: a guide rod is fixedly connected to the upper and lower sides of the movable groove on one side, a sliding block is slidably connected to the surface of the guide rod, and the sliding block is rotatably connected to the rotating rod.

[0012] As a further solution of the utility model: a motor is fixedly connected to the left side of the top of the fixed frame, and the output end of the motor is fixedly connected to the reciprocating screw rod.

[0013] As a further solution of the utility model: the outer right end of the rotating rod is fixedly connected with a gear, the rear side of the gear is meshed with a toothed plate, and the rear side of the toothed plate is fixedly connected to the fixed frame.

[0014] As a further solution of the utility model: a collecting box is inserted into the inner bottom side of the fixing frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The high-speed centrifugal fan oxygenation automatic anti-surge control system, when the high-speed centrifugal fan is in use, the frequency current is fed back to the industrial computer automatic control system through the frequency converter, and the activated pressure detector feeds back the pressure inside the connecting pipe to the industrial computer automatic control system. The industrial computer automatic control system judges the feedback frequency current and pressure. When surge occurs, the industrial computer automatic control system controls the solenoid valve to open, and the air inside the connecting pipe is discharged through the exhaust pipe. At the same time, the industrial computer automatic control system closes the centrifugal fan body. Thereby achieving the effect of automatically detecting whether surge occurs, and automatically opening the air discharge valve when surge occurs, and closing the high-speed centrifugal fan oxygenation control system; preventing the system from continuing to run and damaging the high-speed centrifugal fan when surge occurs.

[0017] In addition, the automatic anti-surge control system for oxygenation of high-speed centrifugal fan drives the moving block to move downward first, move to the bottom and then move upward through the rotating reciprocating screw, and the moving block drives the rotating rod and the cleaning cylinder to move downward to clean the surface of the filter. When the cleaning cylinder brush moves downward, it drives the gear to move downward, and because the gear is meshed with the tooth plate, the gear rotates, thereby driving the cleaning cylinder brush to rotate in the same direction. When the cleaning cylinder brush rotates, the dust on the filter can be taken out through the centrifugal force of the rotation, thereby achieving the effect of cleaning the surface of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an automatic anti-surge control system for oxygen addition of a high-speed centrifugal fan;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the connecting pipes in an automatic anti-surge control system for oxygen addition of a high-speed centrifugal fan;

[0020] Figure 3 It is a structural schematic diagram of a cleaning mechanism in an automatic anti-surge control system for oxygen addition of a high-speed centrifugal fan;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of a cleaning mechanism in an automatic anti-surge control system for oxygen addition of a high-speed centrifugal fan;

[0022] Figure 5 The present invention is a flow chart of the device in an automatic anti-surge control system for oxygen enrichment of a high-speed centrifugal fan.

[0023] In the figure: 10, centrifugal fan body; 101, air inlet pipe; 102, exhaust pipe; 11, connecting pipe; 12, pressure detector; 13, solenoid valve; 14, exhaust pipe; 20, frequency converter; 30, industrial computer automatic control system; 40, cleaning mechanism; 401, fixed frame; 402, movable groove; 403, reciprocating screw rod; 404, moving block; 405, rotating rod; 406, cleaning cylinder brush; 407, guide rod; 408, sliding block; 409, tooth plate; 410, gear; 411, motor; 412, collecting box; 50, filter screen. DETAILED DESCRIPTION

[0024] like Figure 1-5 As shown, a high-speed centrifugal fan oxygen increase automatic anti-surge control system includes a centrifugal fan body 10, the left input end of the centrifugal fan body 10 is fixedly connected to an air inlet pipe 101, the right output end of the centrifugal fan body 10 is fixedly connected to an exhaust pipe 102, and the right side of the exhaust pipe 102 is fixedly connected to a connecting pipe 11 through a flange.

[0025] When in use, the centrifugal fan body 10 is connected to an external power source, and the centrifugal fan body 10 inhales air through the air inlet pipe 101 and discharges it to the connecting pipe 11 through the exhaust pipe 102, and then discharges it to the interior of the object to be oxygenated (such as a fish pond) through the connecting pipe 11.

[0026] Preferably, a filter 50 is fixedly connected to the inner side of the air inlet pipe 101; the filter 50 can filter dust and other impurities in the external air, thereby ensuring the quality of the air sucked into the centrifugal fan body 10 and preventing impurities in the air from contaminating the object to be oxygenated.

[0027] refer to Figure 1 , 2 5. The centrifugal fan body 10 is electrically connected to a frequency converter 20 and an industrial computer automatic control system 30 respectively. The industrial computer automatic control system 30 is electrically connected to the frequency converter 20. When in use, the industrial computer automatic control system 30 starts the centrifugal fan body 10 through the frequency converter 20, and the industrial computer automatic control system 30 can adjust the rotation mode of the built-in motor of the centrifugal fan body 10 through the frequency converter 20 to control the oxygen increase effect of the centrifugal fan body 10.

[0028] Preferably, a pressure detector 12 is installed inside the connecting pipe 11, an exhaust pipe 14 is fixedly connected to the bottom of the connecting pipe 11, and a solenoid valve 13 is installed on the exhaust pipe 14; the solenoid valve 13 and the pressure detector 12 are electrically connected to the industrial computer automatic control system 30.

[0029] When the centrifugal fan body 10 is in use, the frequency converter 20 feeds back the real-time frequency current of the centrifugal fan body 10 to the industrial computer automatic control system 30, and the activated pressure detector 12 feeds back the pressure inside the connecting pipe 11 to the industrial computer automatic control system 30. The industrial computer automatic control system 30 detects and judges the feedback frequency current and pressure. When surge occurs, the industrial computer automatic control system 30 controls the solenoid valve 13 to open, and the air inside the connecting pipe 11 is discharged through the exhaust pipe 14. At the same time, the industrial computer automatic control system 30 turns off the centrifugal fan body 10. In summary, the industrial computer automatic control system 30 automatically monitors the operating frequency of the variable frequency fan; and automatically detects the changes in current and air duct pressure to determine whether surge occurs. When surge occurs, the valve for air discharge is automatically opened to turn off the high-speed centrifugal fan.

[0030] In the above-mentioned oxygen enrichment process, impurities in the air are filtered through the filter 50 to ensure the quality of the inhaled air. However, after a long period of filtration, a layer of impurities will adhere to the surface of the filter 50, affecting the normal extraction of air by the centrifugal fan body 10. Therefore, a cleaning mechanism 40 is proposed.

[0031] refer to Figure 3 , 4 The cleaning mechanism 40 is arranged on the outside of the filter 50, and the cleaning mechanism 40 includes a fixed frame 401 fixed on the front of the air inlet pipe 101, and movable grooves 402 are respectively opened on the left and right sides of the interior of the fixed frame 401, and the upper and lower sides of the interior of the movable groove 402 on the left side are rotatably connected with a rotatable reciprocating screw rod 403, and the surface of the reciprocating screw rod 403 is threadedly connected with a moving block 404, and the right side of the moving block 404 is rotatably connected with a rotatable rotating rod 405, and the surface of the rotating rod 405 is fixedly connected with a cleaning cylinder brush 406, and the rear side surface of the cleaning cylinder brush 406 contacts the surface of the filter 50,

[0032] Preferably, guide rods 407 are fixedly connected to the upper and lower sides of the movable groove 402 on the right side, and a sliding block 408 is slidably connected to the surface of the guide rod 407, and the sliding block 408 is rotatably connected to the rotating rod 405; when in use, the rotating reciprocating screw rod 403 drives the moving block 404 to first move downward, move to the bottom and then move upward in such a reciprocating motion, and the moving block 404 will drive the rotating rod 405 and the cleaning barrel brush 406 to move downward to clean the surface of the filter screen 50, and at the same time, the movement of the rotating rod 405 will drive the sliding block 408 to slide along the surface of the guide rod 407, thereby achieving the effect of guiding the cleaning barrel brush 406 when it moves.

[0033] Preferably, a motor 411 is fixedly connected to the top left side of the fixed frame 401, and the output end of the motor 411 is fixedly connected to the reciprocating screw rod 403; when in use, the motor 411 is started by a power supply, and the output end of the motor 411 drives the reciprocating screw rod 403 to rotate.

[0034] Specifically, the outer right end of the rotating rod 405 is fixedly connected with a gear 410, and the rear side of the gear 410 is meshed with a tooth plate 409, and the rear side of the tooth plate 409 is fixedly connected with the fixed frame 401. When the cleaning cylinder brush 406 moves downward, the gear 410 is driven to move downward, and because the gear 410 is meshed with the tooth plate 409, the gear 410 rotates, thereby driving the cleaning cylinder brush 406 to rotate in the same direction. When the cleaning cylinder brush 406 rotates, the centrifugal force of the rotation can bring out the dust on the filter screen 50, thereby increasing the cleaning effect.

[0035] Preferably, a collecting box 412 is inserted into the inner bottom side of the fixing frame 401 , and the collecting box 412 is arranged inside to collect dust and impurities swept from the surface of the filter screen 50 .

[0036] The working principle of the utility model is: when the centrifugal fan body 10 is in use, the frequency current is fed back to the industrial computer automatic control system 30 through the frequency converter 20, and the started pressure detector 12 feeds back the pressure inside the connecting pipe 11 to the industrial computer automatic control system 30. The industrial computer automatic control system 30 judges the feedback frequency current and pressure. When surge occurs, the industrial computer automatic control system 30 controls the solenoid valve 13 to open, and the air inside the connecting pipe 11 is discharged through the exhaust pipe 14. At the same time, the industrial computer automatic control system 30 closes the centrifugal fan body 10. In summary, the industrial computer automatic control system 30 automatically monitors the operating frequency of the variable frequency fan; and automatically detects the changes in current and air duct pressure to determine whether surge occurs. When surge occurs, the air discharge valve is automatically opened and the high-speed centrifugal fan oxygen enrichment control system is closed.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high-speed centrifugal fan oxygenation automatic anti-surge control system, comprising a centrifugal fan body (10), wherein an input end of the centrifugal fan body (10) is fixedly connected to an air inlet pipe (101), an output end of the centrifugal fan body (10) is fixedly connected to an exhaust pipe (102), and the right side of the exhaust pipe (102) is fixedly connected to a connecting pipe (11) via a flange, characterized in that: The centrifugal fan body (10) is electrically connected to a frequency converter (20) and an industrial computer automatic control system (30), the industrial computer automatic control system (30) is electrically connected to the frequency converter (20), a pressure detector (12) is installed inside the connecting pipe (11), an exhaust pipe (14) is fixedly connected to the bottom of the connecting pipe (11), and a solenoid valve (13) is installed on the exhaust pipe (14); a cleaning mechanism (40) is provided on one side of the air inlet pipe (101).

2. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 1, characterized in that: A filter screen (50) is fixedly connected to the inner side of the air inlet pipe (101).

3. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 1, characterized in that: The cleaning mechanism (40) is arranged on the outside of the filter (50), and comprises a fixed frame (401) fixed on the front side of the air inlet pipe (101), and movable grooves (402) are respectively provided on the left and right sides of the interior of the fixed frame (401), and a rotatable reciprocating screw (403) is rotatably connected to the upper and lower sides of the interior of the left movable groove (402), and a movable block (404) is threadedly connected to the surface of the reciprocating screw (403), and a rotatable rotating rod (405) is rotatably connected to the right side of the movable block (404), and a cleaning barrel brush (406) is fixedly connected to the surface of the rotating rod (405), and the rear side surface of the cleaning barrel brush (406) contacts the surface of the filter (50).

4. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 3, characterized in that: A guide rod (407) is fixedly connected to the upper and lower sides of the movable groove (402) on one side, and a sliding block (408) is slidably connected to the surface of the guide rod (407), and the sliding block (408) is rotatably connected to the rotating rod (405).

5. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 3, characterized in that: A motor (411) is fixedly connected to the left side of the top of the fixed frame (401), and an output end of the motor (411) is fixedly connected to the reciprocating screw rod (403).

6. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 3, characterized in that: The outer right end of the rotating rod (405) is fixedly connected to a gear (410), the rear side of the gear (410) is meshed with a toothed plate (409), and the rear side of the toothed plate (409) is fixedly connected to the fixed frame (401).

7. The high-speed centrifugal fan oxygenation automatic anti-surge control system according to claim 3, characterized in that: A collecting box (412) is inserted into the inner bottom side of the fixing frame (401).

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