CN109600894B - Static electricity removing system - Google Patents
Static electricity removing system Download PDFInfo
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- CN109600894B CN109600894B CN201811616064.9A CN201811616064A CN109600894B CN 109600894 B CN109600894 B CN 109600894B CN 201811616064 A CN201811616064 A CN 201811616064A CN 109600894 B CN109600894 B CN 109600894B
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- 230000003068 static effect Effects 0.000 title claims abstract description 52
- 230000005611 electricity Effects 0.000 title description 17
- 238000003379 elimination reaction Methods 0.000 claims description 7
- 230000008030 elimination Effects 0.000 claims description 6
- 239000000843 powder Substances 0.000 abstract description 55
- 238000004880 explosion Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention discloses a static eliminating system, which comprises: a gas circuit for supplying a gas flow; the discharge unit is electrically connected with the high-voltage power supply and is arranged in the gas circuit; the control unit, the gas pressure sensor and the gas flow sensor are electrically connected with the control unit, and the gas pressure sensor and the gas flow sensor are arranged in the gas circuit; the control unit is used for controlling the high-voltage power supply to stop supplying power to the discharge unit according to the air pressure detected by the air pressure sensor and the air flow detected by the air flow sensor, so that when the air pressure detected by the air pressure sensor is too small and/or the air flow detected by the air flow sensor is too small, the high-voltage power supply can be timely controlled to be disconnected to supply power to the discharge unit, and the explosion accident caused by the fact that powder possibly contacts the discharge unit due to the too small air pressure and/or the too small air flow in the air path is avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of static elimination, in particular to a static elimination system.
Background
In the process of powder storage, transportation and loading and unloading operations, the phenomenon of electrostatic electrification often occurs, and the charged combustible materials are easy to burn and explode along with the accumulation of static electricity. The static electricity is timely and accurately monitored and eliminated, and the method becomes an important subject in the fields of static electricity research and powder conveying.
In the prior art, an ion wind pipeline powder static eliminator (hereinafter referred to as an eliminator for short) is a common means for eliminating static, which ionizes air molecules by applying high voltage to an electrode needle, and then positive and negative ions are blown into a powder conveying pipeline by compressed air flow, so as to eliminate powder static charge.
Because the electric eliminator adopts a high-voltage corona discharge mode to ionize air and generate positive and negative ions, the powder is ensured not to be contacted with an electrode needle with high voltage, otherwise, the powder is easy to burn and explode; thus, the safety control of the current eliminator is particularly important.
Disclosure of Invention
The invention provides a static electricity removing system which is used for removing static electricity generated in the powder conveying process, and timely disconnecting the power supply of a high-voltage power supply to a discharge unit under the condition that the powder possibly contacts the discharge unit, so that the explosion danger is avoided.
In a first aspect, an embodiment of the present invention provides an electrostatic discharge system, including:
a gas circuit for supplying a gas flow;
the discharge unit is electrically connected with the high-voltage power supply and is arranged in the gas circuit;
the control unit, the gas pressure sensor and the gas flow sensor are electrically connected with the control unit, and the gas pressure sensor and the gas flow sensor are arranged in the gas circuit;
the control unit is used for controlling the power supply of the high-voltage power supply to the discharge unit according to the air pressure detected by the air pressure sensor and the air flow detected by the air flow sensor.
Optionally, the power supply circuit and the first relay are electrically connected with the power input end of the high-voltage power supply; the control end of the first relay is electrically connected with the control unit, and the switch of the first relay is connected in series with the power supply loop.
Optionally, the relay further comprises a second relay and a third relay;
the gas pressure sensor and the gas flow sensor both comprise a sensing signal output end and a trigger signal output end;
the sensing signal output end of the gas pressure sensor is electrically connected with the control unit, the control end of the second relay is electrically connected with the triggering signal output end of the gas pressure sensor, and the switch of the second relay is connected in series with the power supply loop;
the sensing signal output end of the gas flow sensor is electrically connected with the control unit, the control end of the third relay is electrically connected with the triggering signal output end of the gas flow sensor, and the switch of the third relay is connected in series with the power supply loop.
Optionally, the static eliminating system further comprises a switch, and the switch is connected in series with the power supply loop.
Optionally, the static eliminating system further comprises a pneumatic electromagnetic valve, wherein the pneumatic electromagnetic valve comprises an input end and an output end;
the input end of the pneumatic electromagnetic valve is used for introducing air flow, and the output end of the pneumatic electromagnetic valve is connected with the input port of the air circuit.
Optionally, the static eliminating system further comprises a fourth relay and a filter;
the filter comprises an input end and an output end, the input end of the filter is used for introducing air flow, and the output end of the filter is connected with the input end of the pneumatic electromagnetic valve;
the control end of the fourth relay is electrically connected with the control unit, and the switch of the fourth relay is connected in series with the power supply loop of the pneumatic electromagnetic valve.
Optionally, the high-voltage power supply, the pneumatic electromagnetic valve, the gas pressure sensor and the gas flow sensor are all arranged in the explosion-proof box.
Optionally, after the control unit is used for controlling the switch of the fourth relay to be turned on, if the air pressure and the flow both meet preset conditions, after the first delay time is kept, a conduction control signal is output to the control end of the first relay, and the switch of the first relay is controlled to be turned on;
and if the air pressure value or the flow value does not meet the preset condition, controlling the switch of the first relay to be turned off.
Optionally, the control unit is configured to control the switch of the first relay to be turned off from on to off, and then control the switch of the fourth relay to be turned off after maintaining the second delay time.
Optionally, the static eliminating system comprises an AC-DC module, an AC input end of the AC-DC module is electrically connected with an AC power supply, and a DC output end of the AC-DC module is electrically connected with a power supply input end of the control unit;
the power supply loop electrically connected with the power input end of the high-voltage power supply is electrically connected with the alternating current power supply.
The static electricity removing system provided in this embodiment includes by setting up the static electricity removing system: a gas circuit for supplying a gas flow; the discharge unit is electrically connected with the high-voltage power supply and is arranged in the gas circuit; the control unit is provided with a gas pressure sensor and a gas flow sensor which are arranged in the gas circuit; the control unit is used for controlling the high-voltage power supply to supply power to the discharge unit according to the air pressure detected by the air pressure sensor and the air flow detected by the air flow sensor, so that the power supply of the high-voltage power supply to the discharge unit can be timely controlled to be disconnected when the air pressure detected by the air pressure sensor is too small and/or the air flow detected by the air flow sensor is too small, the explosion caused by the fact that powder is possibly contacted with the discharge unit due to the too small air pressure in the air path and/or the too small air flow detected by the air flow sensor is avoided, and the safety of powder storage transportation and loading and unloading processes is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an electrostatic discharge system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another static eliminating system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of another static discharge system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another portion of another static-removing system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an air path of the static eliminating system according to the embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a static eliminating system according to an embodiment of the present invention, where the embodiment is applicable to a situation of eliminating static in a powder conveying process, and referring to fig. 1, the static eliminating system includes:
a gas circuit 110 for supplying a gas flow;
the discharge unit 120 and the high-voltage power supply 130, the discharge unit 120 is electrically connected with the high-voltage power supply 130, and the discharge unit 120 is arranged in the gas circuit 110;
the control unit 140, the gas pressure sensor 150 and the gas flow sensor 160, wherein the gas pressure sensor 150 and the gas flow sensor 160 are electrically connected with the control unit 140, and the gas pressure sensor 150 and the gas flow sensor 160 are arranged in the gas circuit 110;
the control unit 140 is configured to control the power supply of the high-voltage power supply 130 to the discharge unit 120 according to the gas pressure detected by the gas pressure sensor 150 and the gas flow detected by the gas flow sensor 160.
The powder conveying process is usually carried out in a powder pneumatic conveying pipeline, and contact and re-separation between the material powder and the pipeline wall and between the material powder particles frequently occur in the conveying process, so that a remarkable electrostatic electrification process can be presented. As described in the background art, an ion wind pipeline powder static eliminator (hereinafter referred to as a static eliminator) is a common device for solving the problem of static electricity generated in the powder conveying process. In the static eliminating system provided in this embodiment, the discharging unit 120 may be an electrode pin of the static eliminator, and the high voltage power supply 130 may be a high voltage source of the static eliminator. The discharge unit 120 ionizes air by using a high voltage corona discharge method to generate positive and negative ions. The discharge unit 120 is disposed in the air path 110, the air path 110 is communicated with the powder pneumatic conveying pipeline, the air path 110 is used for supplying compressed air flow, and then positive and negative ions generated by ionizing air of the discharge unit 120 are blown into the powder pneumatic conveying pipeline, so that the elimination of electrostatic charges of the powder is realized.
In the static electricity removing system provided in this embodiment, the gas pressure sensor 150 is disposed in the gas path 110 for supplying the gas flow, the gas pressure sensor 150 can detect the gas pressure in the gas path 110, and the control unit 140 can obtain the gas pressure in the gas path 110 from the gas pressure sensor 150. When the gas pressure is too small, the powder may contact the discharge unit 120 with high voltage electricity, causing explosion. When the control unit 140 obtains that the gas pressure is too small, for example, when the gas pressure is smaller than a preset pressure threshold, the high-voltage power supply 130 can be controlled to cut off the power supply to the discharge unit 120, so that the explosion cannot be caused when the powder with too small gas pressure possibly contacts the discharge unit 120, and the safety in the powder conveying process is ensured. The control unit 140 may be integrated in a human-computer intelligent interaction platform.
In the actual working process, the gas path 110 behind the gas pressure sensor 150 is often blocked, so that the gas pressure sensor 150 can detect the gas pressure, but the actual gas path 110 has no gas flow. Only the gas pressure sensor 150 is disposed in the gas path 110, when the gas transmission pipeline behind the gas pressure sensor 150 is blocked, the control unit 140 can still obtain normal gas pressure from the gas pressure sensor 150, so that the high-voltage power supply 130 is not controlled to cut off the power supply to the discharge unit 120, and after the gas path 110 is blocked, the gas path 110 has no gas flow, positive and negative ions generated by the ionized air of the discharge unit 120 cannot be blown to the powder conveying pipeline, and meanwhile, the powder also contacts the discharge unit 120 with high voltage electricity, so that the possibility of explosion is caused. Therefore, in the static eliminating system provided by the embodiment of the invention, the gas flow sensor 160 is further disposed in the gas path 110, the gas flow sensor 160 is used for detecting the gas flow in the gas path 110, the gas flow sensor 160 is electrically connected with the control unit 140, and the control unit 140 can obtain the gas flow in the gas path 110 from the gas flow sensor 160.
In order to solve the problem that the gas pressure in the gas path 110 is not equal to the gas flow, and the powder contacts the discharge unit 120 with high voltage to cause explosion, the control unit 140 of the static removing system provided in this embodiment may control the high voltage power supply 130 to supply power to the discharge unit 120 according to the gas pressure detected by the gas pressure sensor 150 and the gas flow detected by the gas flow sensor 160, specifically, when the gas pressure detected by the gas pressure sensor 150 is obtained to be smaller than a preset pressure threshold value and the gas flow detected by the gas flow sensor 160 is obtained to be smaller than a preset flow threshold value, the control unit 140 controls to disconnect the power supply of the high voltage power supply 130 to the discharge unit 120, so as to further ensure that the gas pressure in the gas path 110 is too small, and/or the power supply of the discharge unit 120 is timely disconnected when the gas flow in the gas path 110 is too small, so as to avoid the powder from possibly contacting the explosion caused by the discharge unit 120 with high voltage, and ensure the safety of the powder conveying process.
The static electricity removing system provided in this embodiment includes by setting up the static electricity removing system: a gas circuit for supplying a gas flow; the discharge unit is electrically connected with the high-voltage power supply and is arranged in the gas circuit; the control unit is provided with a gas pressure sensor and a gas flow sensor which are arranged in the gas circuit; the control unit is used for controlling the high-voltage power supply 130 to supply power to the discharge unit according to the air pressure detected by the air pressure sensor and the air flow detected by the air flow sensor, so that when the air pressure detected by the air pressure sensor is too small and/or the air flow detected by the air flow sensor is too small, the power supply of the high-voltage power supply to the discharge unit is timely controlled to be disconnected, the explosion of powder possibly caused by contact of the powder in the air path due to the too small air pressure and/or the too small air flow detected by the air flow sensor is avoided, and the safety of the powder conveying process is ensured.
Fig. 2 is a schematic structural diagram of another static eliminating system provided in the embodiment of the present invention, and it should be noted that a specific air path structure is not shown in fig. 2. Referring to fig. 2, the static electricity removing system further includes a power supply loop 170 electrically connected to the power input terminal of the high voltage power supply 130 and a first relay 180, based on the above scheme; the control end of the first relay 180 is electrically connected to the control unit 140, and the switch R1 of the first relay 180 is serially connected to the power supply loop 170.
Specifically, the control unit 140 may control the high voltage power supply 130 to supply power to the discharge unit 120 by controlling the external power supply to supply power to the high voltage power supply 130 through the power supply loop 170. Referring to fig. 2, the first relay 180 includes a first coil K1 and a first switch R1, the first coil K1 is connected with the control unit 140, and the first switch R1 is connected in series in the power supply loop 170. The high voltage power supply 130 may be connected to the power supply circuit 170
When the first switch R1 of the first relay 180 is connected to an external power supply and it is required to control the high-voltage power supply 130 to supply power to the discharge unit 120, the control unit 140 outputs a control signal to the first coil K1, so that the first coil K1 is powered off, and then the first switch R1 is controlled to be turned off, and then the external power supply stops supplying power to the high-voltage power supply 130, and then the high-voltage power supply 130 cuts off power supply to the discharge unit 120.
FIG. 3 is a schematic view of a portion of another static discharge system according to an embodiment of the present invention; fig. 4 is a schematic diagram of another part of another static eliminating system provided in the embodiment of the present invention, where fig. 3 and fig. 4 together form another static eliminating system (fig. 3 and fig. 4 do not show specific gas path structures and discharge units), and referring to fig. 3 and fig. 4, the static eliminating system further includes a second relay 191 and a third relay 192 optionally;
the gas pressure sensor 150 and the gas flow sensor 160 each include a sensing signal output and a trigger signal output;
the sensing signal output ends A11 and A12 of the gas pressure sensor 150 are electrically connected with the control unit 140, the control end of the second relay 191 is electrically connected with the triggering signal output ends B11 and B12 of the gas pressure sensor 150, and the switch R2 of the second relay 191 is connected in series with the power supply loop;
the sensing signal output ends a21 and a22 of the gas flow sensor 160 are electrically connected to the control unit 140, the control end of the third relay 192 is electrically connected to the trigger signal output ends B21 and B22 of the gas flow sensor 160, and the switch R3 of the third relay 192 is connected in series to the power supply circuit.
The second relay 191 may include a second coil K2 and a second switch R2, both ends of the second coil K2 being point-connected with the trigger signal output terminals B11 and B12 of the gas pressure sensor 150 as control terminals of the second relay 191. The third relay 192 may include a third coil K3 and a third switch R3, both ends of the third coil K3 being electrically connected with the trigger signal output terminals B21 and B22 of the gas flow sensor 160 as control terminals of the third relay 192. The sensing signal outputs a11 and a12 of the gas pressure sensor 150 are electrically connected to the control unit 140 to transmit the detected gas pressure to the control unit 140, and the sensing signal outputs a21 and a22 of the gas flow sensor 160 are electrically connected to the control unit 140 to transmit the detected gas flow to the control unit 140. The control unit 140 may control the power supply of the external power source to the high voltage power source 130 according to the gas pressure detected by the gas pressure sensor 150 and the gas flow detected by the gas flow sensor 160, and thus control the power supply of the high voltage power source 130 to the discharge unit.
For example, if the gas pressure detected by the gas pressure sensor 150 is smaller than the set threshold pressure and/or the gas flow detected by the gas flow sensor 160 is smaller than the set threshold flow, the control unit 140 may output a control signal to the sensing signal output ends a11 and a12 of the gas pressure sensor 150 after acquiring the gas pressure and the gas flow, so that the gas pressure sensor 150 outputs a control signal to the control end (i.e. the second coil K2) of the second relay 191 through the triggering signal output ends B11 and B12 thereof, so that the second coil K2 of the second relay 191 is de-energized, the second switch R2 is turned off, thereby cutting off the power supply of the external power supply to the high-voltage power supply 130, and further cutting off the power supply of the high-voltage power supply 130 to the discharge unit (not shown in fig. 3 and 4), so as to avoid the explosion caused by the contact of the powder with the discharge unit due to the too small gas pressure or the too small gas flow in the gas path, and ensure the safety of the powder transportation process.
In addition, after the gas pressure detected by the gas pressure sensor 150 is smaller than the set threshold pressure and/or the gas flow detected by the gas flow sensor 160 is smaller than the set threshold flow, the control unit 140 may output control signals to the sensing signal output ends a21 and a22 of the gas flow sensor 160, so that the gas flow sensor 160 outputs the control signals to the control end (i.e. the third coil K3) of the third relay 192 through the triggering signal output ends B21 and B22 thereof, the third coil K3 of the third relay 192 is powered off, the third switch R3 is turned off, and then the power supply of the external power supply to the high-voltage power supply 130 is cut off, and further the power supply of the high-voltage power supply 130 to the discharge unit is cut off, so that the powder is prevented from contacting the discharge unit to cause explosion due to the too small gas pressure or the too small gas flow in the gas path, and the safety of the powder transportation process is ensured.
Moreover, after the gas pressure detected by the gas pressure sensor 150 is smaller than the set threshold pressure and/or the gas flow detected by the gas flow sensor 160 is smaller than the set threshold flow, the control unit 140 may output a control signal to the control end (i.e. the first coil K1) of the first relay 180, so that the first coil K1 of the first relay 180 is powered off, the first switch R1 is disconnected, and then the power supply of the external power supply to the high-voltage power supply 130 is cut off, and then the power supply of the high-voltage power supply 130 to the discharge unit is cut off, so that the explosion caused by the contact of the powder with the discharge unit due to the too small gas pressure or the too small gas flow in the gas path is avoided, and the safety of the powder transportation process is ensured.
With continued reference to fig. 4, on the basis of the above scheme, the static eliminating system further includes a switch P1, where the switch P1 is connected in series to the power supply circuit.
The switch P1 may include a normally open switch and a normally closed switch, and the two switches are linked, the normally closed switch is connected in series in a power supply loop of the high-voltage power supply 130 of the power eliminator, and is used as an emergency stop switch, when an emergency occurs in the powder transportation process, the normally open switch in the switch P1 can be pressed down, so that the normally closed switch is turned off, and the external power supply is cut off to supply power to the high-voltage power supply 130, so that potential safety hazards are avoided.
Fig. 5 is a schematic air path diagram of the static eliminating system according to the embodiment of the present invention, referring to fig. 5, on the basis of the above scheme, the static eliminating system further includes a pneumatic electromagnetic valve 210, where the pneumatic electromagnetic valve 210 includes an input end and an output end;
the input end of the pneumatic electromagnetic valve 210 is used for introducing air flow, and the output end of the pneumatic electromagnetic valve 210 is connected with the input port of the air channel.
The pneumatic solenoid valve 210 is disposed in the air path 110, and is used for switching on and off the air flow introduced into the air path 110. When the pneumatic solenoid valve 210 is opened, compressed air flow can be delivered through the air channel 110 to blow positive and negative ions generated by the ionized air of the discharge unit 120 to the powder pneumatic conveying pipeline, so as to eliminate static charges in the powder.
Referring to fig. 3, 4 and 5, the static-removing system optionally further includes a fourth relay and filter 220;
the filter 220 includes an input end and an output end, the input end of the filter 220 is used for introducing air flow, and the output end of the filter 220 is connected with the input end of the pneumatic electromagnetic valve 210;
the control end of the fourth relay is electrically connected with the control unit 140, and the switch R4 of the fourth relay is connected in series with the power supply circuit of the pneumatic electromagnetic valve 210.
By arranging the filter 220 in the air path, moisture, oil drops, impurities and the like in the air flow input into the air path can be filtered, so that the impurities in the air flow are prevented from entering the powder pneumatic conveying pipeline to pollute the powder; and avoiding impurities in the air flow from adhering to the discharge unit, thereby influencing the discharge performance of the discharge unit.
The fourth relay may include a fourth coil K4 and a fourth switch R4, the fourth coil K4 may be electrically connected to the control unit 140, and when the powder conveying operation is started, a control signal may be output to the fourth coil K4 through the control unit 140 to enable the fourth coil K4 to be powered, the fourth switch R4 is closed, and the pneumatic solenoid valve 210 is opened so that the air flow is conveyed into the air path.
Referring to fig. 4, optionally, the high voltage power supply 130, the pneumatic solenoid valve 210, the gas pressure sensor 150, and the gas flow sensor 160 are all installed in the flameproof housing 230. The high-voltage power supply 130, the pneumatic electromagnetic valve 210, the gas pressure sensor 150 and the gas flow sensor 160 are arranged in the explosion-proof box 230, so that the high-voltage power supply 130, the pneumatic electromagnetic valve 210, the gas pressure sensor 150 and the gas flow sensor 160 can be better protected, and the service life of the high-voltage power supply is prolonged.
With continued reference to fig. 3 and fig. 4, optionally, after the control unit 140 is configured to control the switch of the fourth relay to be turned on, if the air pressure and the flow both meet the preset conditions, after the first delay time is maintained, a turn-on control signal is output to the control terminal of the first relay 180 to control the switch of the first relay 180 to be turned on;
if the air pressure value or the flow value does not meet the preset condition, the switch R1 of the first relay 180 is controlled to be turned off.
After the control unit 140 controls the switch R4 of the fourth relay to be turned on, air flow can be introduced into the air path, the air pressure sensor 150 detects air pressure in the air path in real time, the air flow sensor 160 detects air flow in the air path in real time, when the control unit 140 obtains that air pressure and air flow both meet preset conditions, for example, the air pressure is greater than or equal to a set pressure threshold, the air flow is greater than or equal to a set flow threshold, and after the air pressure is kept constant, that is, the air flow in the air path is ensured to be in a stable state, that is, under the condition that the powder is ensured not to be in contact with the discharge unit, the switch on of the first relay 180 is controlled, so that the high-voltage power supply 130 obtains power of an external power supply, and the high-voltage power supply 130 can supply power to the discharge unit. If the air pressure value or the flow value in the air path does not meet the preset condition, the powder may contact the discharge unit, so that the switch R1 of the first relay 180 can be controlled to be turned off, so as to avoid explosion caused by contact of the powder with the discharge unit due to too small air pressure or too small air flow in the air path, and ensure the safety of the powder transportation process.
Optionally, the control unit 140 is configured to control the switch R1 of the first relay 180 to be turned off from on to off, and then control the switch R4 of the fourth relay to be turned off after maintaining the second delay time.
For example, when the control unit 140 receives the powder material conveying stopping instruction, the control unit 140 may delay to disconnect the power supply to the high-voltage power supply 130, and a specific delay time may be set in the control unit 140, and when the powder material conveying finishing instruction is received, the power supply to the high-voltage power supply 130 is stopped (because when the conveying ball valve is closed, the powder material conveyed finally needs a certain time in the pipeline and then reaches the storage bin); meanwhile, the pneumatic electromagnetic valve 210 is continuously opened, and the air supply system continuously delays to supply air to the powder eliminator, so that when powder conveying is about to be completed, the powder cannot contact with the discharge unit, and the explosion danger is avoided. Wherein the second delay time may be set in the control unit 140.
After the second delay time reaches the set value, the control unit 140 closes the pneumatic solenoid valve 210 through the fourth relay to stop the gas supply to the gas path.
Optionally, the static eliminating system further includes an AC-DC module 240, where an AC input end of the AC-DC module 240 is electrically connected to an AC power supply, and a DC output end of the AC-DC module 240 is electrically connected to a power input end of the control unit 140;
the power supply circuit to which the power input terminal of the high voltage power supply 130 is electrically connected to an ac power supply.
By providing the AC-DC module 240 in the static electricity removing system, the AC power source can supply power to the high voltage power source 130, and the AC power provided by the AC power source is converted from AC to DC by the AC-DC module 240 to supply power to the control unit 140, the gas pressure sensor 150, the gas flow sensor 160 and the pneumatic solenoid valve 210.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (5)
1. A static discharge system, comprising:
a gas circuit for supplying a gas flow;
the discharge unit is electrically connected with the high-voltage power supply and is arranged in the gas circuit;
the gas pressure sensor and the gas flow sensor are electrically connected with the control unit, and are arranged in the gas circuit;
the control unit is used for controlling the power supply of the high-voltage power supply to the discharge unit according to the air pressure detected by the air pressure sensor and the air flow detected by the air flow sensor; the high-voltage power supply is a high-voltage source of the power eliminator;
the power supply circuit is electrically connected with the power input end of the high-voltage power supply; the control end of the first relay is electrically connected with the control unit, and the switch of the first relay is connected in series with the power supply loop;
the device also comprises a second relay and a third relay;
the gas pressure sensor and the gas flow sensor both comprise a sensing signal output end and a triggering signal output end;
the sensing signal output end of the gas pressure sensor is electrically connected with the control unit, the control end of the second relay is electrically connected with the triggering signal output end of the gas pressure sensor, and the switch of the second relay is connected in series with the power supply loop;
the sensing signal output end of the gas flow sensor is electrically connected with the control unit, the control end of the third relay is electrically connected with the triggering signal output end of the gas flow sensor, and the switch of the third relay is connected in series with the power supply loop;
the pneumatic electromagnetic valve comprises an input end and an output end;
the input end of the pneumatic electromagnetic valve is used for introducing air flow, and the output end of the pneumatic electromagnetic valve is connected with the input port of the air circuit;
the control end of the fourth relay is electrically connected with the control unit, and a switch of the fourth relay is connected in series with a power supply loop of the pneumatic electromagnetic valve;
the high-voltage power supply, the pneumatic electromagnetic valve, the gas pressure sensor and the gas flow sensor are all arranged in the explosion-proof box.
2. The static-elimination system according to claim 1, further comprising a filter;
the filter comprises an input end and an output end, wherein the input end of the filter is used for introducing air flow, and the output end of the filter is connected with the input end of the pneumatic electromagnetic valve.
3. The static elimination system according to claim 2, wherein said control unit is configured to output a conduction control signal to a control terminal of said first relay after maintaining a first delay time if said air pressure and said flow both satisfy preset conditions after said switch of said fourth relay is turned on, and to control said switch of said first relay to be turned on;
and if the air pressure value or the flow value does not meet the preset condition, controlling the switch of the first relay to be turned off.
4. The static elimination system according to claim 2, wherein said control unit is configured to control said switch of said fourth relay to be turned off after a second delay time from on to off.
5. The static elimination system according to claim 1, further comprising an AC-DC module, an AC input of said AC-DC module being electrically connected to said AC power source, a DC output of said AC-DC module being electrically connected to a power input of said control unit;
and a power supply loop electrically connected with the power input end of the high-voltage power supply is electrically connected with the alternating current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616064.9A CN109600894B (en) | 2018-12-27 | 2018-12-27 | Static electricity removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616064.9A CN109600894B (en) | 2018-12-27 | 2018-12-27 | Static electricity removing system |
Publications (2)
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| CN110337168B (en) * | 2019-05-09 | 2022-06-14 | 上海颀普静电科技有限公司 | Explosion-proof type static elimination system and work flow thereof |
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| US5508880A (en) * | 1995-01-31 | 1996-04-16 | Richmond Technology, Inc. | Air ionizing ring |
| US5688308A (en) * | 1995-05-30 | 1997-11-18 | Trion, Inc. | Electrostatic air cleaning system with air flow sensor |
| JP2005276603A (en) * | 2004-03-24 | 2005-10-06 | Toyota Motor Corp | Bar type static electricity eliminator |
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| CN101071937A (en) * | 2006-05-11 | 2007-11-14 | 欧姆龙株式会社 | Corona discharge type ionizer and fan unit |
| CN105451424A (en) * | 2015-12-30 | 2016-03-30 | 上海安平静电科技有限公司 | Ion fan or ion bar with electrostatic detection and feedback functions |
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| CN109600894A (en) | 2019-04-09 |
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