Flushing control circuit of rotation-resistant material level switch

Abstract

The utility model provides a washing control circuit for a rotation-resistant material level switch. The washing control circuit comprises a first time relay, a second time relay and a first relay, wherein a coil of the first time relay and a normally closed contact of the second time relay are sequentially connected in series between the first bus and the second bus; a normally open contact of the first time relay and a coil of the first relay are sequentially connected in series between the first bus and the second bus, and a coil of the second time relay and the coil of the first relay are connected in parallel; a normally-open contact of the first relay is connected to a power supply loop of the flushing mechanism in series. According to the washing control circuit of the rotation-resistant material level switch, washing and cleaning of the detection end of the rotation-resistant material level switch can be achieved, the false alarm problem caused by material accumulation and blockage of the rotation-resistant material level switch is reduced, manual participation is avoided, the cleaning efficiency of the rotation-resistant material level switch is effectively improved, and the labor cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of control circuits, and in particular to a flushing control circuit of a rotary paddle level switch. Background Art

[0002] Rotary paddle level switches are used to detect the level of solid materials and are widely used in feeding equipment such as feeders. However, since the level detection of rotary paddle level switches requires rotating blades and the rotary paddle level switches work in a dusty environment, after long-term operation, the rotary paddle level switches are prone to false alarms due to accumulation and blockage of materials at blades, bearings, etc. The current solution is mostly manual cleaning, which is not only inefficient, but also has high labor costs and is difficult to meet production needs. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, an object of the present disclosure is to provide a flushing control circuit for a rotary paddle level switch.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a flushing control circuit of a rotary resistance material level switch, comprising: a first time relay, a second time relay and a first relay; wherein the coil of the first time relay and the normally closed contact of the second time relay are connected in series between the first bus and the second bus in sequence; the normally open contact of the first time relay and the coil of the first relay are connected in series between the first bus and the second bus in sequence, and the coil of the second time relay and the coil of the first relay are connected in parallel; the normally open contact of the first relay is connected in series to the power supply circuit of the flushing mechanism, and the flushing mechanism is used to flush the detection end of the rotary resistance material level switch; when the coil of the first time relay is energized, the normally open contact of the first time relay is closed after a delay of a first time, and when the coil of the second time relay is energized, the normally closed contact of the second time relay is opened after a delay of a second time.

[0006] Optionally, the control circuit also includes: a switching switch and a second relay; wherein the first path of the switching switch and the coil of the second relay are connected in series between the first bus and the second bus in sequence; the second path of the switching switch and the normally open contact of the first time relay are connected in parallel; the normally open contact of the second relay, the normally closed contact of the second time relay and the coil of the first time relay are connected in series between the first bus and the second bus in sequence; the first path of the switching switch is turned on, or the second path of the switching switch is turned on.

[0007] Optionally, the control circuit further includes: a first button switch, a third relay, a fourth relay and a third time relay; wherein the first button switch and the coil of the third relay are connected in series between the first bus and the second bus in sequence; the normally open contact of the third relay and the coil of the fourth relay are connected in series between the first bus and the second bus in sequence, and the normally open contact of the third relay and the first normally open contact of the fourth relay are connected in parallel; the second normally open contact of the fourth relay is connected in series between the second normally open contact of the fourth relay and the normally closed contact of the second time relay; the coil of the third time relay is connected in series with the normally closed contact of the second time relay and the first time relay The coils of the electrical appliances are connected in parallel; the normally closed contact of the fourth relay and the normally open contact of the third time relay are connected in series between the normally open contact of the second relay and the coil of the first relay in sequence, and the normally closed contact of the fourth relay, the normally open contact of the third time relay and the coil of the first relay are connected in parallel with the second normally open contact of the fourth relay, the normally closed contact of the second time relay and the coil of the first time relay; the third normally open contact of the fourth relay is connected in series to the power supply circuit of the feeding device, and the rotation-blocking material level switch is used to detect the blockage of the feeding device; when the coil of the third time relay loses power, the normally open contact of the third time relay is disconnected after a delay of a third time.

[0008] Optionally, the control circuit also includes: a fifth relay, a sixth relay and a fourth time relay; wherein, the coil of the fifth relay and the normally closed alarm contact of the rotary level switch are connected in series between the first bus and the second bus in sequence, and the normally open contact of the fifth relay is connected in series between the first bus and the normally open contact of the third relay; the coil of the sixth relay and the coil of the fourth relay are connected in parallel, and the normally open contact of the sixth relay is connected in series to the power supply circuit of the rotary level switch; the coil of the fourth time relay and the coil of the first relay are connected in parallel, and the normally open contact of the fourth time relay and the normally closed alarm contact of the rotary level switch are connected in parallel; when the coil of the fourth time relay loses power, the normally open contact of the fourth time relay is disconnected after a fourth time delay.

[0009] Optionally, the control circuit further includes: an alarm light, wherein the alarm light and a normally closed contact of the fifth relay are sequentially connected in series between the first bus and the second bus.

[0010] Optionally, the control circuit also includes: a fifth time relay, the coil of the fifth time relay is connected in parallel with the coil of the third relay, and the normally open contact of the fifth time relay is connected in parallel with the alarm normally closed contact of the rotary level switch; wherein, when the coil of the fifth time relay loses power, the normally open contact of the fifth time relay is disconnected after a delay of a fifth time.

[0011] Optionally, the control circuit also includes: a second button switch and a seventh relay; wherein the coils of the second button switch and the seventh relay are connected in series between the first bus and the second bus in sequence; and the normally closed contact of the seventh relay is connected in series between the first bus and the normally open contact of the third relay.

[0012] Optionally, the control circuit also includes: a conversion switch, a first instruction normally open contact of the DCS, and a second instruction normally open contact of the DCS; wherein, the first path of the conversion switch is connected in series between the first bus and the first push button switch, and the first path of the conversion switch is connected in series between the first bus and the second push button switch; the first instruction normally open contact is connected in series between the second path of the conversion switch and the coil of the third relay, and the second instruction normally open contact is connected in series between the second path of the conversion switch and the coil of the seventh relay; the first path of the conversion switch is turned on, or the second path of the conversion switch is turned on.

[0013] Optionally, the control circuit further includes: an air circuit breaker, which is connected in series to the first bus.

[0014] Optionally, the control circuit further includes: a fuse, wherein the fuse is connected in series to the first bus.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] Through the cooperation of the first time relay, the second time relay and the first relay, the automatic cycle opening of the flushing mechanism is realized, which not only can realize the flushing and cleaning of the detection end of the rotary paddle level switch and reduce the false alarm problem of the rotary paddle level switch due to material accumulation and blockage, but also avoids manual intervention, thereby effectively improving the cleaning efficiency of the rotary paddle level switch, reducing labor costs, and meeting the production needs of high efficiency and low cost.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a circuit diagram of a flushing control circuit of a rotary paddle material level switch proposed in an embodiment of the present disclosure;

[0020] As shown in the figure: KT1, the first time relay, KT2, the second time relay, KT3, the third time relay, KT4, the fourth time relay, KT5, the fifth time relay;

[0021] KA1, the first relay, KA2, the second relay, KA3, the third relay, KA4, the fourth relay, KA5, the fifth relay, KA6, the sixth relay, KA7, the seventh relay;

[0022] SA1, transfer switch, SA2, conversion switch;

[0023] SB1, first push button switch, SB2, second push button switch, DCS1, first command normally open contact, DCS2, second command normally open contact;

[0024] HL, warning light, QF, air circuit breaker, FU, fuse;

[0025] K. Alarm normally closed contact. DETAILED DESCRIPTION

[0026] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0027] like Figure 1As shown, the embodiment of the present disclosure proposes a flushing control circuit of a rotary resistance material level switch, including: a first time relay KT1, a second time relay KT2 and a first relay KA1; wherein, the coil of the first time relay KT1 and the normally closed contact of the second time relay KT2 are connected in series between the first bus and the second bus in sequence, the normally open contact of the first time relay KT1 and the coil of the first relay KA1 are connected in series between the first bus and the second bus in sequence, the coil of the second time relay KT2 and the coil of the first relay KA1 are connected in parallel, the normally open contact of the first relay KA1 is connected in series to the power supply circuit of the flushing mechanism, and the flushing mechanism is used to flush the detection end of the rotary resistance material level switch, when the coil of the first time relay KT1 is energized, the normally open contact of the first time relay KT1 is closed after a delay of a first time, and when the coil of the second time relay KT2 is energized, the normally closed contact of the second time relay KT2 is opened after a delay of a second time.

[0028] It can be understood that, in the initial state, the normally open contact of the first time relay KT1 is disconnected, and the normally closed contact of the second time relay KT2 is closed. At the same time, the normally open contact of the first relay KA1 is disconnected, and the flushing mechanism is closed.

[0029] When the first bus and the second bus cooperate to supply power, the coil of the first time relay KT1 is energized first, so that the normally open contact of the first time relay KT1 is closed, and then the coil of the first relay KA1 and the coil of the second time relay KT2 are energized. When the coil of the first relay KA1 is energized, the normally open contact of the first relay KA1 is closed, and then the flushing mechanism is opened to flush and clean the detection end of the rotary level switch.

[0030] Among them, when the coil of the first time relay KT1 is energized, the normally open contact of the first time relay KT1 is closed after a delay of a first time, so that when the first time relay KT1 is energized again after power failure, the flushing mechanism can be opened by using the first relay KA1 after the first time. At the same time, when the coil of the second time relay KT2 is energized, the normally closed contact of the second time relay KT2 is disconnected after a delay of a second time, so that the second time relay KT2 can make the first time relay KT1 de-energized at an interval of a second time after the first time relay KT1 uses the first relay KA1 to open the flushing mechanism, thereby realizing the first time relay KT1 being energized again, and then the flushing mechanism can be continuously opened in a cycle with the first time as the interval time and the second time as the flushing time, thereby realizing automatic and regular cleaning of the detection end of the rotary level switch.

[0031] Therefore, through the cooperation of the first time relay KT1, the second time relay KT2 and the first relay KA1, the automatic cycle opening of the flushing mechanism is realized, which not only can realize the flushing and cleaning of the detection end of the rotary level switch and reduce the false alarm problem of the rotary level switch due to material accumulation and blockage, but also avoids manual participation, thereby effectively improving the cleaning efficiency of the rotary level switch, reducing labor costs, and meeting the production needs of high efficiency and low cost.

[0032] It should be noted that a relay is an electrical control device. When the change in the input quantity (excitation quantity) reaches the specified requirement, it causes a predetermined step change in the controlled quantity in the electrical output circuit. The relay includes a coil and contacts. The coil and contacts are linked. For example, when the coil is energized, the normally open contact closes and the normally closed contact opens. When the coil loses power, the normally open contact opens and the normally closed contact closes.

[0033] Among them, the time relay is a special relay among relays. A time relay refers to a relay whose output circuit will produce a jump change (or contact action) after a specified and accurate time has passed after the input action signal is added (or removed).

[0034] The first time relay KT1 includes a coil and a normally open contact. The coil and the normally open contact of the first time relay KT1 are linked. The specific type of the first time relay KT1 can be set according to actual needs and is not limited to this.

[0035] Among them, the first time is the interval time for opening the flushing mechanism. The first time can be set according to actual needs and there is no limitation on this. For example, the first time can be 12 hours, that is, the flushing mechanism is opened once every 12 hours.

[0036] The second time relay KT2 includes a coil and a normally closed contact. The coil and the normally closed contact of the second time relay KT2 are linked. The specific type of the second time relay KT2 can be set according to actual needs and is not limited to this.

[0037] Among them, the second time is the duration of the flushing mechanism being turned on. The second time can be set according to actual needs and there is no limitation on this. For example, the second time can be 1 minute, that is, the flushing time of the flushing mechanism is 1 minute each time.

[0038] The first relay KA1 includes a coil and a normally open contact. The coil and the normally open contact of the first relay KA1 are linked together. The specific type of the first relay KA1 can be set according to actual needs and is not limited to this.

[0039] The flushing mechanism is used to pressurize the fluid so as to use the pressurized fluid to flush the detection end of the rotary level switch. The specific type of the flushing mechanism can be set according to actual needs and is not limited to this. For example, the flushing mechanism may include a pump group, a valve group and a nozzle. The pump group, the valve group and the nozzle are connected in sequence. The pump group pressurizes fluids such as water and air. The valve group is used to control the on-off of the passage between the pump group and the nozzle. The nozzle is directed toward the blades and bearings at the detection end of the rotary level switch. The nozzle is used to spray fluid to the blades and bearings at the detection end of the rotary level switch. The normally open contact of the first relay KA1 can be connected in series to the power supply circuit of the valve group.

[0040] The first bus and the second bus are used to cooperate with each other to realize power supply. The specific types of the first bus and the second bus can be set according to actual needs and are not limited to this. For example, the first bus can be a live wire and the second bus can be a neutral wire. The output voltage of the first bus and the second bus is 220VAC.

[0041] like Figure 1 As shown, in some embodiments, the control circuit also includes: a switching switch SA1 and a second relay KA2; wherein, the first path of the switching switch SA1 and the coil of the second relay KA2 are connected in series between the first bus and the second bus in sequence, the second path of the switching switch SA1 and the normally open contact of the first time relay KT1 are connected in parallel, the normally open contact of the second relay KA2, the normally closed contact of the second time relay KT2 and the coil of the first time relay KT1 are connected in series between the first bus and the second bus in sequence, the first path of the switching switch SA1 is turned on, or the second path of the switching switch SA1 is turned on.

[0042] It can be understood that when the first path of the switching switch SA1 is turned on, the coil of the second relay KA2 is energized, so that the normally open contact of the second relay KA2 is closed, thereby energizing the coil of the first time relay KT1, and then utilizing the cooperation of the first time relay KT1, the second time relay KT2 and the first relay KA1 to achieve automatic cycle opening of the flushing mechanism; when the second path of the switching switch SA1 is turned on, the coil of the first relay KA1 is energized, so that the normally open contact of the first relay KA1 is closed, thereby achieving manual opening of the flushing mechanism.

[0043] Therefore, by switching the first passage and the second passage in the switch SA1, the automatic cycle opening and manual opening of the flushing mechanism can be achieved, thereby meeting different cleaning requirements of the detection end of the rotary level switch.

[0044] It should be noted that the switching switch SA1 is used for switching between different paths. The switching switch SA1 includes: a first path and a second path. The specific type of the switching switch SA1 can be set according to actual needs and is not limited to this. In addition to being able to switch to the first path and the second path, the switching switch SA1 can also switch to a third path without external connection, that is, to turn off the impact mechanism to meet the needs of shutdown maintenance and other work.

[0045] The second relay KA2 includes a coil and a normally open contact. The coil and the normally open contact of the second relay KA2 are linked to each other. The specific type of the second relay KA2 can be set according to actual needs and is not limited to this.

[0046] like Figure 1 As shown, in some embodiments, the control circuit also includes: a first button switch SB1, a third relay KA3, a fourth relay KA4 and a third time relay KT3; wherein, the coils of the first button switch SB1 and the third relay KA3 are connected in series between the first bus and the second bus in sequence, the normally open contact of the third relay KA3 and the coil of the fourth relay KA4 are connected in series between the first bus and the second bus in sequence, and the normally open contact of the third relay KA3 and the first normally open contact of the fourth relay KA4 are connected in parallel, the second normally open contact of the fourth relay KA4 is connected in series between the second normally open contact of the fourth relay KA4 and the normally closed contact of the second time relay KT2, the coil of the third time relay KT3 is connected in series with the normally closed contact of the second time relay KT2 and the first The coil of time relay KT1 is connected in parallel, the normally closed contact of the fourth relay KA4 and the normally open contact of the third time relay KT3 are connected in series between the normally open contact of the second relay KA2 and the coil of the first relay KA1 in sequence, and the normally closed contact of the fourth relay KA4, the normally open contact of the third time relay KT3 and the coil of the first relay KA1 are connected in parallel with the second normally open contact of the fourth relay KA4, the normally closed contact of the second time relay KT2 and the coil of the first time relay KT1, the third normally open contact of the fourth relay KA4 is connected in series to the power supply circuit of the feeding device, the rotary level switch is used to detect blockage of the feeding device, and when the coil of the third time relay KT3 loses power, the normally open contact of the third time relay KT3 is disconnected after a third time delay.

[0047] It can be understood that when the first button switch SB1 is turned on, the coil of the third relay KA3 is energized, so that the normally open contact of the third relay KA3 is closed, thereby energizing the coil of the fourth relay KA4, and then the first normally open contact, the second normally open contact and the third normally open contact of the fourth relay KA4 are closed, and the normally closed contact of the fourth relay KA4 is opened.

[0048] When the first normally open contact of the fourth relay KA4 is closed, the self-locking of the fourth relay KA4 is achieved, thereby ensuring the stable power supply to the coil of the fourth relay KA4; when the third normally open contact of the fourth relay KA4 is closed, the power supply circuit of the feeding device is turned on, thereby realizing the opening of the feeding device; when the second normally open contact of the fourth relay KA4 is closed, the coil of the first time relay KT1 is energized, thereby enabling the flushing mechanism to clean the detection end of the rotary level switch, that is, the flushing mechanism can only be turned on when the feeding device is turned on, thereby reducing the opening time of the rotary level switch and extending the service life of the rotary level switch.

[0049] When the coil of the fourth relay KA4 is energized, the second normally open contact of the fourth relay KA4 closes, so that the coil of the third time relay KT3 is energized; when the coil of the fourth relay KA4 is de-energized, the second normally open contact of the fourth relay KA4 is disconnected, so that the coil of the third time relay KT3 is de-energized, and at the same time the normally closed contact of the fourth relay KA4 is closed.

[0050] When the coil of the third time relay KT3 loses power, the normally open contact of the third time relay KT3 is disconnected after a delay of the third time, so that within the third time when the feeding device is closed, the coil of the first relay KA1 can be energized by the normally open contact of the second relay KA2, the normally closed contact of the fourth relay KA4 and the normally open contact of the third time relay KT3, thereby realizing the opening of the flushing mechanism. Therefore, through the cooperation of the fourth relay KA4 and the third time relay KT3, the flushing mechanism can be used to realize the automatic cleaning of the detection end of the rotary level switch when the feeding device is closed, thereby reducing the false alarm problem of the rotary level switch due to the blockage of material accumulation.

[0051] It should be noted that a push button switch refers to a switch that uses a button to push a transmission mechanism to connect or disconnect a moving contact and a static contact and achieve circuit switching.

[0052] The first button switch SB1 is used for starting control of the feeding device. The specific type of the first button switch SB1 can be set according to actual needs and is not limited to this.

[0053] The third relay KA3 includes a coil and a normally open contact. The coil and the normally open contact of the third relay KA3 are linked. The specific type of the third relay KA3 can be set according to actual needs and is not limited to this.

[0054] The fourth relay KA4 includes a coil, a first normally open contact, a second normally open contact, a third normally open contact and a normally closed contact. The coil of the fourth relay KA4 is linked with the first normally open contact, the second normally open contact, the third normally open contact and the normally closed contact. The specific type of the fourth relay KA4 can be set according to actual needs and there is no restriction on this.

[0055] The third time relay KT3 includes a coil and a normally open contact. The coil and the normally open contact of the third time relay KT3 are linked. The specific type of the third time relay KT3 can be set according to actual needs and is not limited to this.

[0056] Among them, the third time is the duration of the flushing mechanism being turned on after the feeding device is turned off. The third time can be set according to actual needs and is not limited to this. For example, the third time can be 1 minute, that is, the flushing time of the flushing mechanism is 1 minute after the feeding device is turned off.

[0057] The feeding device is used to convey materials. The rotary paddle level switch is arranged in the feeding device to detect blockage in the feeding device. When the rotary paddle level switch detects material, it indicates that the feeding device is blocked. At this time, the alarm normally closed contact K of the rotary paddle level switch is disconnected. When the rotary paddle level switch does not detect material, it indicates that the feeding device discharges material smoothly. At this time, the alarm normally closed contact K of the rotary paddle level switch is closed. The specific type of the feeding device can be set according to actual needs and is not limited to this. For example, the feeding device can be a feeder for limestone feeding.

[0058] like Figure 1 As shown, in some embodiments, the control circuit also includes: a fifth relay KA5, a sixth relay KA6 and a fourth time relay KT4; wherein, the coil of the fifth relay KA5 and the alarm normally closed contact K of the rotary level switch are connected in series between the first bus and the second bus in sequence, and the normally open contact of the fifth relay KA5 is connected in series between the first bus and the normally open contact of the third relay KA3, the coil of the sixth relay KA6 and the coil of the fourth relay KA4 are connected in parallel, and the normally open contact of the sixth relay KA6 is connected in series to the power supply circuit of the rotary level switch, the coil of the fourth time relay KT4 and the coil of the first relay KA1 are connected in parallel, the normally open contact of the fourth time relay KT4 and the alarm normally closed contact K of the rotary level switch are connected in parallel, and when the coil of the fourth time relay KT4 loses power, the normally open contact of the fourth time relay KT4 is disconnected after a delay of a fourth time.

[0059] It can be understood that when the rotary paddle material level switch does not detect blockage, the alarm normally closed contact K of the rotary paddle material level switch closes, so that the coil of the fifth relay KA5 is energized, thereby closing the normally open contact of the fifth relay KA5, and then energizing the coil of the fourth relay KA4, thereby ensuring the continuous operation of the feeding device.

[0060] When the rotary paddle material level switch detects a blockage, the alarm normally closed contact K of the rotary paddle material level switch is disconnected, causing the coil of the fifth relay KA5 to lose power, thereby causing the normally open contact of the fifth relay KA5 to disconnect, and further causing the coil of the fourth relay KA4 to lose power, thereby preventing the feeding device from being damaged due to continued operation.

[0061] Among them, when the coil of the first relay KA1 is energized, the coil of the fourth time relay KT4 is also energized, so that the normally open contact of the fourth time relay KT4 is closed and the alarm normally closed contact K of the rotary level switch is short-circuited for protection. At the same time, when the coil of the fourth time relay KT4 loses power, the normally open contact of the fourth time relay KT4 is disconnected after a delay of the fourth time, so that after the coil of the first relay KA1 loses power, the normally open contact of the fourth time relay KT4 continues to short-circuit the alarm normally closed contact K of the rotary level switch for the fourth time. Therefore, through the cooperation of the fourth time relay KT4, the rotary level switch is prevented from having false alarms during the flushing process.

[0062] When the coil of the fourth relay KA4 is energized, the coil of the sixth relay KA6 is also energized, thereby achieving synchronous switching of the feeding device and the rotary paddle level switch, thereby reducing the opening time of the rotary paddle level switch and extending the service life of the rotary paddle level switch.

[0063] It should be noted that the fifth relay KA5 includes a coil and a normally open contact. The coil and the normally open contact of the fifth relay KA5 are linked. The specific type of the fifth relay KA5 can be set according to actual needs and is not limited to this.

[0064] The sixth relay KA6 includes a coil and a normally open contact. The coil and the normally open contact of the sixth relay KA6 are linked. The specific type of the sixth relay KA6 can be set according to actual needs and is not limited to this.

[0065] The fourth time relay KT4 includes a coil and a normally open contact. The coil and the normally open contact of the fourth time relay KT4 are linked. The specific type of the fourth time relay KT4 can be set according to actual needs and is not limited to this.

[0066] Among them, the fourth time is the protection time of the rotary level switch after the flushing mechanism is closed. The fourth time can be set according to actual needs and is not limited to this. For example, the fourth time can be 5 seconds, that is, the rotary level switch is delayed for protection, and the set time is 5 seconds. In other words, the short-circuit protection time of the rotary level switch is 5 seconds after the flushing mechanism is closed.

[0067] The alarm normally closed contact K setting of the rotary paddle level switch can trigger the power-off action when problems such as disconnection occur, thereby improving the stability and safety of the rotary paddle level switch.

[0068] like Figure 1 As shown, in some embodiments, the control circuit further includes: an alarm light HL, and the alarm light HL and a normally closed contact of the fifth relay KA5 are sequentially connected in series between the first bus and the second bus.

[0069] It can be understood that when the rotary resistance material level switch does not detect material blockage, the alarm normally closed contact K of the rotary resistance material level switch is closed, so that the coil of the fifth relay KA5 is energized, thereby causing the normally closed contact of the fifth relay KA5 to be disconnected, and the alarm light HL is turned off; when the rotary resistance material level switch detects material blockage, the alarm normally closed contact K of the rotary resistance material level switch is disconnected, so that the coil of the fifth relay KA5 is de-energized, thereby causing the normally closed contact of the fifth relay KA5 to be closed, and the alarm light HL is turned on, thereby facilitating the reminder of the operating personnel to take corresponding actions in a timely manner.

[0070] It should be noted that the specific type of the alarm can be set according to actual needs and is not limited to this. For example, the alarm can be a sound alarm, a light alarm, etc.

[0071] like Figure 1 As shown, in some embodiments, the control circuit also includes: a fifth time relay KT5, the coil of the fifth time relay KT5 is connected in parallel with the coil of the third relay KA3, and the normally open contact of the fifth time relay KT5 is connected in parallel with the alarm normally closed contact K of the rotary level switch; wherein, when the coil of the fifth time relay KT5 loses power, the normally open contact of the fifth time relay KT5 is disconnected after a delay of the fifth time.

[0072] It can be understood that when the coil of the third relay KA3 is energized, the coil of the fifth time relay KT5 is also energized, so that the normally open contacts of the fifth time relay KT5 are closed, thereby making it impossible for the rotary material level switch to detect material blockage, and when the coil of the third relay KA3 is de-energized, the coil of the fifth time relay KT5 is also de-energized, thereby making it possible for the rotary material level switch to detect material blockage.

[0073] Among them, when the coil of the fifth time relay KT5 loses power, the normally open contact of the fifth time relay KT5 is disconnected after a delay of the fifth time, so that the rotary resistance level switch starts to operate after the feeding device is turned on for the fifth time, thereby avoiding the false alarm problem of the rotary resistance level switch caused by the instantaneous opening of the feeding device.

[0074] It should be noted that the fifth time relay KT5 includes a coil and a normally open contact, and the coil and the normally open contact of the fifth time relay KT5 are linked. The specific type of the fifth time relay KT5 can be set according to actual needs and is not limited to this.

[0075] Among them, the fifth time is the protection time of the rotary paddle level switch after the feeding device is turned on. The fifth time can be set according to actual needs and is not limited to this. For example, the fifth time can be 5 seconds, that is, the rotary paddle level switch is delayed for protection, and the set time is 5 seconds. In other words, the short-circuit protection time of the rotary paddle level switch is 5 seconds after the feeding device is turned on.

[0076] Since the first button switch SB1 applies a pulse signal, the coil of the third relay KA3 and the coil of the fifth time relay KT5 quickly lose power after being powered on. The self-locking structure of the fourth relay KA4 can enable the continuous operation of the feeding device. However, since the fifth time relay KT5 does not have a self-locking structure, the normally open contact of the fifth time relay KT5 is disconnected immediately after the fifth time.

[0077] like Figure 1 As shown, in some embodiments, the control circuit also includes: a second button switch SB2 and a seventh relay KA7; wherein the coils of the second button switch SB2 and the seventh relay KA7 are connected in series between the first bus and the second bus respectively, and the normally closed contact of the seventh relay KA7 is connected in series between the first bus and the normally open contact of the third relay KA3.

[0078] It can be understood that when the second button switch SB2 is turned on, the coil of the seventh relay KA7 is energized, causing the normally closed contact of the seventh relay KA7 to be disconnected, thereby de-energizing the coil of the fourth relay KA4, thereby achieving the closure of the feeding device.

[0079] It should be noted that the second button switch SB2 is used for closing control of the feeding device, and the specific type of the second button switch SB2 can be set according to actual needs and is not limited to this.

[0080] The seventh relay KA7 includes a coil and a normally closed contact. The coil and the normally closed contact of the seventh relay KA7 are linked. The specific type of the seventh relay KA7 can be set according to actual needs and is not limited to this.

[0081] like Figure 1As shown, in some embodiments, the control circuit also includes: a transfer switch SA2, a first instruction normally open contact DCS1 of a DCS (Distributed Control System) and a second instruction normally open contact DCS2 of the DCS; wherein, the first path of the transfer switch SA2 is connected in series between the first bus and the first push button switch SB1, and the first path of the transfer switch SA2 is connected in series between the first bus and the second push button switch SB2, the first instruction normally open contact DCS1 is connected in series between the second path of the transfer switch SA2 and the coil of the third relay KA3, and the second instruction normally open contact DCS2 is connected in series between the second path of the transfer switch SA2 and the coil of the seventh relay KA7, the first path of the transfer switch SA2 is turned on, or the second path of the transfer switch SA2 is turned on.

[0082] It can be understood that when the first path of the conversion switch SA2 is turned on, the first button switch SB1 and the second button switch SB2 can be used to realize the switch control of the feeding device, and when the second path of the conversion switch SA2 is turned on, the first command normally open contact DCS1 and the second command normally open contact DCS2 can be used to realize the switch control of the feeding device. Therefore, by switching the first path and the second path in the conversion switch SA2, the feeding device can be flexibly controlled to meet different control requirements.

[0083] It should be noted that the conversion switch SA2 is used to switch different paths. The conversion switch SA2 includes a first path and a second path. The specific type of the conversion switch SA2 can be set according to actual needs and is not limited thereto.

[0084] The first command normally open contact DCS1 is used for opening control of the feeding device. The specific type of the first command normally open contact DCS1 can be set according to actual needs and is not limited to this.

[0085] The second command normally open contact DCS2 is used for closing control of the feeding device. The specific type of the second command normally open contact DCS2 can be set according to actual needs and is not limited to this.

[0086] The first push button switch SB1 and the second push button switch SB2 can be arranged near the feeding device, that is, controlled locally, while the first command normally open contact DCS1 and the second command normally open contact DCS2 can be remotely controlled through DCS.

[0087] like Figure 1 As shown, in some embodiments, the control circuit further includes: an air circuit breaker QF and / or a fuse FU, the air circuit breaker QF is connected in series on the first bus, and the fuse FU is connected in series on the first bus.

[0088] It can be understood that through the setting of the air circuit breaker QF and the fuse FU, overcurrent protection of the first bus and the second bus can be achieved, thereby effectively improving the power supply safety of the first bus and the second bus, and thus ensuring the stable operation of the control circuit.

[0089] It should be noted that the air circuit breaker QF is a switch that automatically disconnects as long as the current in the circuit exceeds the rated current. The specific type of the air circuit breaker QF can be set according to actual needs and is not limited to this.

[0090] The fuse FU is a fuse link, which mainly plays an overload protection role. The specific type of the fuse FU can be set according to actual needs and is not limited to this.

[0091] The air circuit breaker QF and the fuse FU are both arranged at the current front section of the first busbar.

[0092] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0093] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A paddle level switch flushing control circuit, characterized in that: include: A first time relay, a second time relay and a first relay; Wherein, the coil of the first time relay and the normally closed contact of the second time relay are sequentially connected in series between the first busbar and the second busbar; The normally open contact of the first time relay and the coil of the first relay are connected in series between the first bus and the second bus in sequence, and the coil of the second time relay and the coil of the first relay are connected in parallel; The normally open contact of the first relay is connected in series to the power supply circuit of the flushing mechanism, and the flushing mechanism is used to flush the detection end of the rotary level switch; When the coil of the first time relay is energized, the normally open contact of the first time relay is closed after a delay of a first time, and when the coil of the second time relay is energized, the normally closed contact of the second time relay is opened after a delay of a second time; Among them, the flushing mechanism includes a pump group, a valve group and a nozzle, the pump group, the valve group and the nozzle are connected in sequence, the pump group is used for pressurizing and conveying fluid, the nozzle is facing the blades and bearings at the detection end of the rotary level switch, and the normally open contact of the first relay is connected in series to the power supply circuit of the valve group.

2. The flushing control circuit of the rotary paddle level switch according to claim 1 is characterized in that: The control circuit further comprises: Changeover switch and second relay; Wherein, the first path of the switching switch and the coil of the second relay are sequentially connected in series between the first bus and the second bus; The second path of the switching switch is connected in parallel with the normally open contact of the first time relay; The normally open contact of the second relay, the normally closed contact of the second time relay and the coil of the first time relay are sequentially connected in series between the first bus and the second bus; The first path of the switching switch is turned on, or the second path of the switching switch is turned on.

3. The flushing control circuit of the rotary paddle level switch according to claim 2 is characterized in that: The control circuit further comprises: a first push button switch, a third relay, a fourth relay and a third time relay; Wherein, the coils of the first button switch and the third relay are sequentially connected in series between the first busbar and the second busbar; The normally open contact of the third relay and the coil of the fourth relay are connected in series between the first bus and the second bus in sequence, and the normally open contact of the third relay and the first normally open contact of the fourth relay are connected in parallel; The second normally open contact of the fourth relay is connected in series between the second normally open contact of the fourth relay and the normally closed contact of the second time relay; The coil of the third time relay is connected in parallel with the normally closed contact of the second time relay and the coil of the first time relay; The normally closed contact of the fourth relay and the normally open contact of the third time relay are sequentially connected in series between the normally open contact of the second relay and the coil of the first relay, and the normally closed contact of the fourth relay, the normally open contact of the third time relay and the coil of the first relay are connected in parallel with the second normally open contact of the fourth relay, the normally closed contact of the second time relay and the coil of the first time relay; The third normally open contact of the fourth relay is connected in series to the power supply circuit of the feeding device, and the rotation-blocking material level switch is used to detect the blockage of the feeding device; When the coil of the third time relay loses power, the normally open contact of the third time relay is disconnected after a delay of a third time.

4. The flushing control circuit of the rotary paddle level switch according to claim 3 is characterized in that: The control circuit further comprises: a fifth relay, a sixth relay and a fourth time relay; The coil of the fifth relay and the normally closed alarm contact of the rotary level switch are sequentially connected in series between the first bus and the second bus, and the normally open contact of the fifth relay is connected in series between the first bus and the normally open contact of the third relay; The coil of the sixth relay is connected in parallel with the coil of the fourth relay, and the normally open contact of the sixth relay is connected in series to the power supply circuit of the rotary level switch; The coil of the fourth time relay is connected in parallel with the coil of the first relay, and the normally open contact of the fourth time relay is connected in parallel with the alarm normally closed contact of the rotary level switch; When the coil of the fourth time relay loses power, the normally open contact of the fourth time relay is disconnected after a fourth time delay.

5. The flushing control circuit of the rotary paddle level switch according to claim 4 is characterized in that: The control circuit further comprises: An alarm light, wherein the alarm light and the normally closed contact of the fifth relay are sequentially connected in series between the first bus and the second bus.

6. The flushing control circuit of the rotary paddle level switch according to claim 3 is characterized in that: The control circuit further comprises: A fifth time relay, wherein the coil of the fifth time relay is connected in parallel with the coil of the third relay, and the normally open contact of the fifth time relay is connected in parallel with the alarm normally closed contact of the rotary level switch; When the coil of the fifth time relay loses power, the normally open contact of the fifth time relay is disconnected after a delay of the fifth time.

7. The flushing control circuit of the rotary paddle level switch according to claim 3 is characterized in that: The control circuit further comprises: a second push button switch and a seventh relay; Wherein, the second button switch and the coil of the seventh relay are sequentially connected in series between the first bus and the second bus; The normally closed contact of the seventh relay is connected in series between the first bus and the normally open contact of the third relay.

8. The flushing control circuit of the rotary paddle level switch according to claim 7, characterized in that: The control circuit further comprises: The transfer switch, the first command normally open contact of the DCS and the second command normally open contact of the DCS; Wherein, the first path of the conversion switch is connected in series between the first bus and the first push button switch, and the first path of the conversion switch is connected in series between the first bus and the second push button switch; The first instruction normally open contact is connected in series between the second path of the transfer switch and the coil of the third relay, and the second instruction normally open contact is connected in series between the second path of the transfer switch and the coil of the seventh relay; The first path of the conversion switch is turned on, or the second path of the conversion switch is turned on.

9. The flushing control circuit of the rotary paddle level switch according to claim 1, characterized in that: The control circuit further comprises: An air circuit breaker is connected in series to the first busbar.

10. The flushing control circuit of the rotary paddle level switch according to claim 1, characterized in that: The control circuit further comprises: A fuse is connected in series to the first busbar.

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