Control system of inclined blanket type batch feeder for glass factory

Abstract

The invention provides a control system of an inclined blanket type batch feeder for a glass factory, which relates to the technical field of electrical control, and comprises a power supply connected with an engine of the batch feeder through a main circuit; the electromagnetic valve control circuit is used for controlling the opening and closing of the electromagnetic valve so as to drive the lifting and falling of a scraping plate of the batch feeder; the start-stop control circuit is used for controlling the engine to start to realize continuous feeding and controlling the engine to switch between start and stop according to a set time interval to realize pulse feeding; and the clutch control circuit is used for controlling the on-off of the clutch, so that the left batch feeder and the right batch feeder are switched between an independent transmission state and a linkage transmission state. The automatic feeding machine has the advantages that independent transmission and linkage transmission are achieved, any feeding machine can drive two feeding shovels to feed materials at the same time, stable feeding of the feeding amount can be guaranteed, stable production of a glass factory is guaranteed, and the engine is controlled to be switched between starting and stopping according to the set time interval so that the pulse type feeding function can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical control, and in particular to a control system of an inclined carpet type feeder used in a glass factory. Background Art

[0002] The function of the glass factory feeder is to push the raw materials from the furnace head silo into the furnace feed pool to start preheating and melting. There are many types of feeders used in glass melting furnaces, such as ridge feeders, drum feeders, inclined blanket feeders, and uniformly wrapped feeders. At present, large glass melting furnaces generally use inclined blanket feeders, and most of them are used in two units.

[0003] First of all, the feeder is an important equipment in the glass factory. If the feeder fails, it will not be able to feed, which will seriously affect the normal production of the glass factory. Secondly, in the past, the control requirements for the inclined blanket feeder were relatively simple, and stable feeding at a constant speed could meet the production requirements, that is, continuous feeding. However, with the progress and development of the glass industry, production requirements are increasing, and control requirements are becoming more and more detailed. For example, in order to melt the raw materials more evenly in the melting furnace, the process puts forward new feeding requirements: the feeder must be able to achieve continuous feeding and pulse feeding. However, the feeders in the prior art often cannot meet the needs of pulse feeding. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a control system for an inclined blanket type feeder for a glass factory, wherein the feeder comprises a left feeder and a right feeder, and the left feeder and the right feeder are connected and driven by a universal joint; the control system comprises:

[0005] Power supply, connected to the engine of the feeder through the main circuit;

[0006] A solenoid valve control circuit, connected to the solenoid valve of the feeder and the power supply, for controlling the opening and closing of the solenoid valve to drive the lifting and lowering of the scraper plate of the feeder;

[0007] A start-stop control circuit, connected to the main circuit, is used to control the engine to start to achieve continuous feeding, and to control the engine to switch between starting and stopping at a set time interval to achieve pulse feeding;

[0008] The clutch control circuit is connected to the clutch in the feeder and is used to control the on and off of the clutch so that the left feeder and the right feeder are switched between independent transmission and linkage transmission states.

[0009] Preferably, the main circuit comprises:

[0010] A first circuit breaker, one end of which is connected to the power supply, the other end of which is connected to the frequency converter via a first contactor switch, and the other end of which is also connected to the start-stop control circuit;

[0011] The first port, the second port, the fourth port, the fifth port, the thirty-seventh port, the eighteenth port and the twelfth port of the frequency converter are connected to the start-stop control circuit, the fifty-fourth port and the fifty-fifth port of the frequency converter receive the frequency conversion signal of the external distributed control system, and the thirty-ninth port and the forty-second port of the frequency converter send a feedback signal to the distributed control system;

[0012] The engine is connected to a three-phase electrical output port and a grounding port of the inverter.

[0013] Preferably, the solenoid valve control circuit comprises:

[0014] A third circuit breaker, one end of the third circuit breaker is connected to the power supply, the other end of the third circuit breaker is connected to the input end of the DC-AC converter, the positive terminal of the DC-AC converter is connected to the positive pole of the first proximity switch, the positive pole of the second proximity switch, and is also connected to the positive pole of the solenoid valve through the first relay switch, and the negative terminal of the DC-AC converter is connected to the negative pole of the first proximity switch, the negative pole of the second proximity switch and the negative pole of the solenoid valve

[0015] The output end of the first proximity switch is connected to the negative terminal of the DC-AC converter via a first relay, and the output end of the second proximity switch is connected to the negative terminal of the DC-AC converter via a second relay.

[0016] Preferably, the start-stop control circuit comprises:

[0017] a second circuit breaker, one end of the second circuit breaker being connected to the main circuit, the other end of the second circuit breaker being connected to the first, third, fifth and seventh terminals of the transfer switch, the fourth terminal of the transfer switch being connected to the local operation indicator light, the second terminal of the transfer switch being connected to the third relay, and the eighth terminal of the transfer switch being connected in series in sequence to a self-reset button, a self-reset stop button, a first normally closed contact, the first contactor switch and a fourth relay;

[0018] One end of a fourth relay switch is connected to the other end of the second circuit breaker, the other end of the fourth relay switch is connected to a fifth relay through the first contactor switch, one end of the fifth relay switch is connected to the other end of the second circuit breaker, the other end of the fifth relay switch is connected to one end of the second relay switch, and the other end of the second relay switch is connected to the other end of the fourth relay switch;

[0019] The first port of the frequency converter is connected to one end of the second circuit breaker, and the second port of the frequency converter is connected to the sixth relay;

[0020] One end of the sixth relay switch is connected to the other end of the second circuit breaker, and the other end of the sixth relay switch is connected to the operation indicator light.

[0021] Preferably, it also includes an alarm circuit:

[0022] The fourth port of the frequency converter is connected to one end of the second circuit breaker, and the fifth port of the frequency converter is connected to the seventh relay;

[0023] Then a seventh relay switch is also connected between the first contactor switch and the fourth relay.

[0024] Preferably, it also includes a fan control circuit, which is connected to the fan of the feeder and the power supply and is used to control the fan to dissipate heat; the fan control circuit includes:

[0025] a fourth circuit breaker, one end of the fourth circuit breaker being connected to the power supply, the other end of the fourth circuit breaker being connected to one end of a second contactor switch, the other end of the second contactor switch being connected to the fan through a thermal relay, and the fan being further connected to a ground wire of the power supply;

[0026] The start-stop control circuit also includes a fan start subcircuit, including a fifth relay switch, one end of the fifth relay switch is connected to the main circuit, the other end of the fifth relay is connected to one end of the thermal relay, and the other end of the thermal relay is connected to the second contactor.

[0027] Preferably, the start-stop control circuit also includes an emergency stop subcircuit, including:

[0028] An emergency stop button is connected to the other end of the second circuit breaker and the contactor coil of the first contactor switch.

[0029] Preferably, the clutch includes a left clutch, a middle clutch and a right clutch, and the clutch control circuit includes:

[0030] A fifth circuit breaker, one end of the fifth circuit breaker is connected to the power supply, the other end of the fifth circuit breaker is respectively connected to one end of the first travel switch to the sixth travel switch, the other ends of the first travel switch to the sixth travel switch are respectively connected to the eighth relay to the thirteenth relay, and the eighth relay to the thirteenth relay are connected to the power supply;

[0031] A ninth relay switch, an eleventh relay switch, a thirteenth relay switch and a fourteenth relay are connected in series in sequence between the other end of the fifth circuit breaker and the power supply.

[0032] Preferably, a fourteenth relay switch is also connected between the emergency stop button and the contactor coil in the emergency stop sub-circuit.

[0033] The above technical solution has the following advantages or beneficial effects:

[0034] 1) The present invention uses two feeding machines (a left feeding machine and a right feeding machine), and adds a "clutch control circuit"; under normal circumstances, the two feeding machines drive their respective feeding shovels to "independently drive" to feed; when any one of the feeding machines fails, the operator can use the "clutch control circuit" to achieve "linked transmission", so that any one of the feeding machines can drive two feeding shovels to feed at the same time, and still ensure the stable delivery of the feeding amount, ensuring the stable production of the glass factory.

[0035] 2) The present invention sets a main circuit and a start-stop control circuit in the control system of the feeder. Through the cooperation of the main circuit and the start-stop control circuit, combined with the programming of subsequent programs, the engine is controlled to start to realize continuous feeding, and the engine is controlled to switch between starting and stopping according to a set time interval to realize pulse feeding, thereby realizing the function of pulse feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural schematic diagram of a control system of an inclined blanket type feeder used in a glass factory in a preferred embodiment of the present invention;

[0037] Figure 2 The figure is a schematic diagram of the structure of the left feeder and the right feeder in a preferred embodiment of the present invention;

[0038] Figure 3 A circuit diagram of a main circuit in a preferred embodiment of the present invention;

[0039] Figure 4 A circuit diagram of a solenoid valve control circuit in a preferred embodiment of the present invention;

[0040] Figure 5 A circuit diagram of a start-stop control circuit in a preferred embodiment of the present invention;

[0041] Figure 6 A circuit diagram of a fan control circuit in a preferred embodiment of the present invention;

[0042] Figure 7 This is a circuit diagram of a clutch control circuit in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the gist of the present invention.

[0044] In a preferred embodiment of the present invention, based on the above problems existing in the prior art, a control system for an inclined blanket type feeder for a glass factory is provided, wherein the feeder comprises a left feeder 100 and a right feeder 200, and the left feeder 100 and the right feeder 200 are connected and driven by a universal joint 300; Figure 1 As shown, including:

[0045] The power supply is connected to the engine M of the feeder through the main circuit 1;

[0046] The solenoid valve control circuit 2 is connected to the solenoid valve DT of the feeder and the power supply, and is used to control the opening and closing of the solenoid valve DT to drive the lifting and lowering of the scraper plate of the feeder;

[0047] The start-stop control circuit 3 is connected to the main circuit 1 and is used to control the engine M to start to achieve continuous feeding, and to control the engine M to switch between starting and stopping according to a set time interval to achieve pulse feeding;

[0048] The clutch control circuit 4 is connected to the clutch in the feeder and is used to control the on and off of the clutch so that the left feeder 100 and the right feeder 200 are switched between independent transmission and linkage transmission states.

[0049] Specifically, in this embodiment, the feeder is an important equipment in the glass factory. If the feeder fails, the feeder cannot be fed, which seriously affects the normal production of the glass factory. Therefore, the improved circuit of the present invention uses two feeders (such as Figure 2 As shown, it includes a left feeder 100 and a right feeder 200, which are connected by a universal joint 300), and a "clutch control circuit 4" is added; under normal circumstances, the two feeders drive their respective feeding shovels to feed independently; when any of the feeders fails, the operator can control the on and off of the clutch through the "clutch control circuit 4" to achieve "linked transmission", so that the engine M of any feeder can drive the two feeders to feed at the same time, and the stable delivery of the feed amount can still be ensured, ensuring the stable production of the glass factory.

[0050] In a preferred embodiment of the present invention, Figure 3 As shown, the main circuit 1 includes:

[0051] The first circuit breaker QL1, one end of the first circuit breaker QL1 is connected to the power supply (L1, L2, L3 three-phase line power supply, N neutral line, PE ground line, in order to improve the power supply safety, a power circuit breaker QL is also provided), the other end of the first circuit breaker QL1 is connected to the inverter UF1 through the first contactor switch KM1_1, and the other end of the first circuit breaker QL1 is also connected to the start-stop control circuit;

[0052] The first port, the second port, the fourth port, the fifth port, the thirty-seventh port, the eighteenth port and the twelfth port of the frequency converter UF1 are connected to the start-stop control circuit 2, the fifty-fourth port and the fifty-fifth port of the frequency converter UF1 receive the frequency conversion signal of the external distributed control system DCS, and the thirty-ninth port and the forty-second port of the frequency converter UF1 send a feedback signal to the distributed control system DCS;

[0053] The engine M is connected to the three-phase electrical output port UVW and the grounding port PE of the inverter UF1.

[0054] In a preferred embodiment of the present invention, Figure 4 As shown, the solenoid valve control circuit 2 includes:

[0055] A third circuit breaker QL04, one end of the third circuit breaker QL04 is connected to the power supply L1, the other end of the third circuit breaker QL04 is connected to the input end of the DC-AC converter TB1, the positive terminal of the DC-AC converter TB1 is connected to the positive electrode of the first proximity switch SPQ1 and the positive electrode of the second proximity switch SP2, and is connected to the positive electrode of the solenoid valve DT1 through the first relay switch KA41_2, and the negative terminal of the DC-AC converter TB1 is connected to the negative electrode of the first proximity switch SP1, the negative electrode of the second proximity switch SP2 and the negative electrode of the solenoid valve DT1;

[0056] The output end of the first proximity switch SP1 is connected to the negative terminal of the DC-AC converter TB1 through the first relay KA41_1, and the output end of the second proximity switch SP2 is connected to the negative terminal of the DC-AC converter TB1 through the second relay KA42_1.

[0057] In a preferred embodiment of the present invention, Figure 5 As shown, the start-stop control circuit 3 includes:

[0058] The second circuit breaker QL01, one end of the second circuit breaker QL01 is connected to the main circuit 1, the other end of the second circuit breaker QL01 is connected to the first, third, fifth and seventh terminals of the transfer switch SA11, the fourth terminal of the transfer switch SA11 is connected to the local operation indicator light HW11a, the second terminal of the transfer switch SA11 is connected to the third relay KA11_1, and the eighth terminal of the transfer switch SA11 is connected in series with the self-reset button SF1a, the self-reset stop button SS1a, the first normally closed contact DSC_DO, the first contactor switch KM1_1 and the fourth relay KA12_1 in sequence;

[0059] One end of the fourth relay switch KA12_2 is connected to the other end of the second circuit breaker QL01, the other end of the fourth relay switch KA12_2 is connected to the fifth relay KA13_1 through the first contactor switch KM1_1, one end of the fifth relay switch KA13_2 is connected to the other end of the second circuit breaker QL01, the other end of the fifth relay switch KA13_2 is connected to one end of the second relay switch KA42_2, and the other end of the second relay switch KA42_2 is connected to the other end of the fourth relay switch KA12_2;

[0060] One end of the fifth relay switch KA13_2 is connected to the eighteenth port of the frequency converter UF1, and the other end of the fifth relay switch KA13_2 is connected to the thirty-seventh port and the twelfth port of the frequency converter UF1;

[0061] The first port of the frequency converter UF1 is connected to one end of the second circuit breaker QL01, and the second port of the frequency converter UF1 is connected to the sixth relay KA14_1;

[0062] One end of the sixth relay switch KA14_2 is connected to the other end of the second circuit breaker QL01, and the other end of the sixth relay switch KA14_2 is connected to the operation indicator light HG1a.

[0063] In a preferred embodiment of the present invention, Figure 5 As shown, it also includes an alarm circuit:

[0064] The fourth port of the frequency converter UF1 is connected to one end of the second circuit breaker QL01, and the fifth port of the frequency converter UF1 is connected to the seventh relay KA15_1;

[0065] Then the seventh relay switch KA15_2 is also connected between the first contactor switch KM1_1 and the fourth relay KA12_1.

[0066] In a preferred embodiment of the present invention, Figure 6 As shown, it also includes a fan control circuit 5, which is connected to the fan MA1a of the feeder and the power supply, and is used to control the fan MA1a to dissipate heat; the fan control circuit 5 includes:

[0067] A fourth circuit breaker QL1a, one end of the fourth circuit breaker Ql1a is connected to the power supply, the other end of the fourth circuit breaker QL1a is connected to one end of the second contactor switch KM1a_2, the other end of the second contactor switch KM1a_2 is connected to the fan MA1a through the thermal relay KH1a, and the fan MA1a is also connected to the ground wire PE of the power supply;

[0068] The start-stop control circuit 3 also includes a fan start subcircuit, including a fifth relay switch KA13_2, one end of the fifth relay switch KA13_2 is connected to the main circuit, the other end of the fifth relay switch KA13_2 is connected to one end of the thermal relay KH1a, and the other end of the thermal relay KH1a is connected to the second contactor KM1a_1.

[0069] In a preferred embodiment of the present invention, the start-stop control circuit 3 also includes an emergency stop subcircuit, including:

[0070] The emergency stop button SE1 connects the other end of the second circuit breaker QL01 and the first contactor coil KM1_2.

[0071] In a preferred embodiment of the present invention, Figure 2 As shown, the clutch includes a left clutch A, a middle clutch B and a right clutch C. Figure 7 As shown, the clutch control circuit 4 includes:

[0072] The fifth circuit breaker QL03, one end of the fifth circuit breaker CL03 is connected to the power supply L1, the other end of the fifth circuit breaker QL03 is respectively connected to one end of the first travel switch 1SQ2 to the sixth travel switch 3SQ1, the other ends of the first travel switch 1SQ2 to the sixth travel switch 3SQ1 are respectively connected to the eighth relay to the thirteenth relay KA31_1-KA36_1, and the eighth relay KA31_1 to the thirteenth relay KA36_1 are connected to the power supply N;

[0073] A ninth relay switch KA32_2, an eleventh relay switch KA34_2, a thirteenth relay switch KA36_2 and a fourteenth relay KA37_1 are connected in series in sequence between the other end of the fifth circuit breaker QL03 and the power supply N.

[0074] In a preferred embodiment of the present invention, a fourteenth relay switch KA37_2 is further connected between the emergency stop button SE1 and the contactor coil KM1_2 in the emergency stop sub-circuit.

[0075] like Figure 2As shown, the present invention is based on two feeders (including a left feeder 100 and a right feeder 200, and the left feeder 100 and the right feeder 200 are connected by a universal joint 300), and the two feeders are provided with a solenoid valve control circuit, a start-stop control circuit, a clutch control circuit, an alarm circuit, a fan control circuit and all the circuits mentioned above with exactly the same structure. In order not to repeat the description, the circuits described in the above embodiments and Figure 3-Figure 7 What is shown is the circuit connected to the left feeder. When describing the right feeder and related circuits, just adjust the numbering of the electronic components.

[0076] The following is a description of the control process of independent transmission / linked transmission / continuous feeding / pulse feeding of two feeding machines based on the circuit of the above embodiment:

[0077] The electrical UPS cabinet can be used as the power supply UPS for the feeder. Because the feeder is an important electrical equipment in the glass factory, it requires a highly reliable and stable power supply; and the incoming power supply of the electrical UPS cabinet is generally at least two independent power supplies, and is equipped with a double cut switch; if any one of the power is cut off, the double cut switch can be used to switch to the other to continue the power supply. If both independent power supplies are cut off, the built-in UPS battery can still provide power for more than 30 minutes.

[0078] First, the staff closed the power circuit breaker QL in the power supply, the first circuit breaker QL1 in the main circuit, the fourth circuit breaker QL1a in the fan control circuit, the third circuit breaker QL04 in the solenoid valve control circuit, the fifth circuit breaker QL03 in the clutch control circuit, and the second circuit breaker QL01 in the start-stop control circuit, so that the main circuit, fan control circuit, solenoid valve control circuit, clutch control circuit, and start-stop control circuit are connected to the power supply. When the staff closed the second circuit breaker QL01, as shown in the figure, Figure 5 As shown, the emergency stop button SE1 and the fourteenth relay switch KA37_2 are normally closed, and the first contactor coil KM1_2 is energized. Figure 3 The first contactor switch KM1_1 is closed and the engine MA1 is powered on. Here, the power-on process of the engine MA1 of the left feeder 100 is described. Since the circuit structures of the left feeder 100 and the right feeder 200 are exactly the same, the engine MA2 in the right feeder 200 is also powered on in the same way.

[0079] When the engines of the two feeders (the engine MA1 of the left feeder and the engine of the right feeder are marked as MA2) are not connected by the universal joint 300 (i.e., the middle clutch B is not turned on and closed), the left / right feeder is in the "test gear", and the start and stop of the engines MA1 and MA2 can be directly controlled. The left / right feeder can be started and stopped separately or at the same time, regardless of the opening and closing state of the clutch. When the two engines are connected by the universal joint 300 (i.e., the middle clutch B is turned on and closed), the left / right feeder is in the "working gear", and the corresponding table of the clutch state and the travel switch state is shown in Table 1:

[0080] Table 1 Comparison table of clutch status and travel switch

[0081]

[0082] The corresponding table of clutch status and feeder transmission mode is shown in Table 2:

[0083] Table 2 Transmission mode and clutch status comparison table

[0084]

[0085]

[0086] Combining the clutch control circuit, Table 1 and Table 2, it can be seen that by adjusting the on and off of each travel switch, the closed and open states of the left clutch A, the middle clutch B and the right clutch C can be adjusted, so that the left feeder 100 and the right feeder 200 can switch between independent transmission and linkage transmission. Under normal circumstances, the two feeders drive their respective feeding shovels to feed independently; when any of the feeders fails, the operator can control the on and off of the clutch through the "clutch control circuit 4" to achieve "linked transmission", so that the engine M of any feeder can drive the two feeders to feed at the same time, and still ensure the stable delivery of the feed amount, ensuring the stable production of the glass factory.

[0087] It should be noted that when the left / right feeder is in the "working gear" state, that is, when the transmission mode of "linked transmission" is adopted, the left / right feeder cannot rotate at the same time, because the left / right feeder is connected through a universal joint, but the rotation of the left / right feeder cannot be 100% synchronized. If asynchronous rotation occurs at this time, the universal joint will be damaged at the least, and the feeder will be damaged at the worst. Therefore, the clutch state and the feeder transmission mode must meet the requirements of Table 2, that is, in "linked transmission", the middle clutch B remains closed, and only one of the left clutch A and the right clutch C can be closed at the same time. At this time, in order to prevent damage to the equipment caused by human error in operating the "full closing of left, middle and right clutches", a chain protection subcircuit is set in the clutch control circuit.

[0088] Interlocking protection sub-circuit Figure 7 As shown, the ninth relay switch KA32_2, the eleventh relay switch KA34_2, the thirteenth relay switch KA36_2 and the fourteenth relay KA37_1 are connected in series between the other end of the fifth circuit breaker QL03 and the power supply N. According to Tables 1 and 2, when the second travel switch 1SQ1, the fourth travel switch 2SQ1 and the sixth travel switch 3SQ1 are turned on, it means that the left clutch A, the middle clutch B and the right clutch C are all closed. At this time, the ninth relay KA32_1, the eleventh relay KA34_1 and the thirteenth relay KA36_1 are energized, and the corresponding ninth relay switch KA32_2, the eleventh relay KA34_2 and the thirteenth relay KA36_1 are energized. 14_1, which is connected in series with the ninth relay switch KA32_2, the eleventh relay switch KA34_2, and the thirteenth relay switch KA36_2, is energized. At this time, the fourteenth relay KA37_1 connected in series with the ninth relay switch KA32_2, the eleventh relay switch KA34_2, and the thirteenth relay switch KA36_2 is energized. Figure 5 The fourteenth relay switch KA37_2 corresponding to the fourteenth relay KA37_1 changes from the normally closed state to the open state, and the first contactor coil KM1_2 connected in series with the fourteenth relay switch KA37_2 is de-energized. Immediately, the first contactor switch KM1_1 corresponding to the first contactor coil KM1_2 in the main circuit is disconnected, causing the main circuit of the feeder to be disconnected, and the engines MA1 and MA2 to be de-energized. In this way, interlocking protection is implemented to prevent damage to the equipment caused by human error in operating the "left, middle and right clutches fully closed".

[0089] Next, when the on-site personnel operate the conversion switch SA11 in the start-stop control circuit and turn the knob to "③--④, ⑦--⑧" to connect the third terminal and the fourth terminal, and connect the seventh terminal and the eighth terminal, the local operation indicator HW11a lights up, and the third control circuit is in the "local operation state".

[0090] Furthermore, the self-reset stop button SS1a is normally closed, the first contact coil switch KM1_1 is closed, and the seventh relay switch KA15_2 is normally closed. When the on-site personnel press the self-reset button SF1a, the fourth relay KA12_1 is energized, and then the fourth relay switch KA12_2 is closed. At this time, the coil circuit of the intermediate relay KA12 completes self-locking (such as Figure 5As shown in the figure, the fourth relay switch KA12_2 is also connected in series with the second circuit breaker QL01, the self-reset stop button SS1a, the first contact coil switch KM1_1, the seventh relay switch KA15_2 and the fourth relay KA12_1, so when the fourth relay KA12_1 is energized, the fourth relay switch KA12_2 is closed. At this time, the circuit is turned on, and the fourth relay KA12_1 is no longer associated with the closed state of the self-reset button SF1a, that is, self-locking is completed).

[0091] When the fourth relay switch KA12_2 is closed, the fifth relay KA13_1 is also energized, so the fifth relay switch KA13_2 is also closed. Since the second relay switch KA42_2 connected in series with the fifth relay switch KA13_2 is in a normally closed state, the coil circuit of the fifth relay KA13_1 connected in series with the fifth relay switch KA13_2 and the second relay switch KA42_2 is also self-locked. When the fifth relay switch KA13_2 is also closed, the "port 18" of the inverter UF1 is closed and energized. At this time, the left feeder 100 rotates to feed. After the normally open fifth relay KA13_2 is also closed, the second contactor KM1a_1 connected in series with the fifth relay KA13_2 is energized, and the corresponding second contactor switch KM1a_2 is closed, and the fan controlling the heat dissipation is started to dissipate heat.

[0092] When the feeder needs to "pulse feed", the DCS (Distributed Control System) controls the "open / close" of the first normally closed contact DSC_DO, and then controls the power on / off of the fourth relay KA12_1, and then controls the power on / off of the fifth relay KA13_1, and then controls the start / stop of the frequency converter UF1 through the fifth relay switch KA13_2 connected to the 18th port of the frequency converter UF1, and then achieves the purpose of controlling the start / stop of the engine MA1 of the left feeder 100. The right feeder 200 and the left feeder 100 are provided with exactly the same circuit, and the control process of the pulse feed of the right feeder 200 is exactly the same as that of the left feeder, which will not be repeated here. The time interval of the "open and break" of the first normally closed contact DSC_DO is set by the program of the DCS (Distributed Control System). Corresponding to the pulse feeding is the continuous feeding. The only difference between the continuous feeding and the pulse feeding is that the continuous feeding keeps the first normally closed contact DSC_DO normally closed, while the pulse feeding controls the first normally closed contact DSC_DO to open and close according to the set time interval. The implementation principle of the continuous feeding will not be repeated here.

[0093] It should be noted that after the first normally closed contact DSC_DO is "disconnected", the feeder does not stop immediately, but continues to operate until the feeding shovel reaches the highest position after completing a feeding cycle (the second proximity switch SP2 detects that it has reached the highest position, and the second proximity switch SP2 is closed at this time), causing the second relay switch KA42_2 to be disconnected, and then the fifth relay KA13_1 loses power, and the feeder motor stops running at this time. After the feeding shovel stays at the highest position for a certain period of time (this time is set by the program), the first normally closed contact DSC_DO is closed again, causing the fourth relay KA12_1 and the fifth relay KA13_1 to be powered again, and the inverter UF1 "Port 18" is closed and powered again, at which time the motor restarts and the feeding shovel enters the next feeding cycle.

[0094] When the left feeder 100 and the inverter UF1 are operating normally, the inverter UF1 "port 01-02" is closed, according to Figure 5 It can be seen that the sixth relay KA14_1 is energized, and then the sixth relay switch KA14_2 is closed, and the operation indicator HG1a is on to indicate that the left feeder 100 is operating normally, and the normally open sixth relay switch KA14_2 closes the signal to transmit the DI board of the DCS system. The right feeder 200 and the left feeder 100 are provided with exactly the same circuit, and the operation status indication process of the right feeder 200 is exactly the same as that of the left feeder 100, which will not be repeated here.

[0095] When the left feeder 100 is in abnormal operation, the inverter UF1 "port 04-05" is closed. Figure 5 It can be seen that the seventh relay KA15_1 is energized, the normally closed seventh relay switch KA15_2 is disconnected, the fourth relay KA12_1 is de-energized, and then the fourth relay switch KA12_2 is disconnected; at this time, the state of the second proximity switch SP2 is first detected. At the moment when the second proximity switch SP2 changes from open to closed (that is, when the feeding shovel is in the last position of the movement), the second relay KA42_1 is energized, and then the normally closed second relay switch KA42_1 is disconnected, so the fifth relay KA13_1 is de-energized, the self-locking circuit of the fifth relay KA13_1 is disconnected, and the port "18" of the inverter UF1 is de-energized. At this time, the inverter UF1 and the engine MA1 of the left feeder stop working. After the normally open fifth relay switch KA13_2 is also disconnected, the second contactor KM1a_1 is de-energized, the second contactor switch KM1a_2 is disconnected, and the heat dissipation fan stops working. When the normally closed seventh relay switch KA15_2 is disconnected, the frequency converter UF1 alarms, and the disconnection signal of the normally open and normally closed seventh relay switch KA15_2 is transmitted to the DCS system DI board. Fault alarm is realized. The right feeder 200 and the left feeder 100 are provided with exactly the same circuit, and the fault alarm process of the right feeder 200 is exactly the same as that of the left feeder 100, which will not be repeated here.

[0096] When human error occurs, "full engagement of left, center and right clutches" (such as Figure 2 As shown, the left clutch A corresponds to the first travel switch 1SQ2 and the second travel switch 1SQ1, the middle clutch B corresponds to the third travel switch 2SQ2 and the fourth travel switch 2SQ1, and the right clutch C corresponds to the fifth travel switch 3SQ2 and the sixth travel switch 3SQ1. When the second travel switch 1SQ1, the fourth travel switch 2SQ1, and the sixth travel switch 3SQ1 are fully closed (representing the full closing of the left, middle, and right clutches), the ninth relay KA32_1, the eleventh relay KA34_1, and the thirteenth relay KA36_1 are energized, and then the ninth relay switch KA32_2, the eleventh relay switch KA34_2, and the thirteenth relay switch KA36_2 are closed, so the fourteenth relay KA37_1 is energized, and then the fourteenth relay switch KA37_2 is disconnected. At this time, the first contactor KM1_1 loses power, the first contactor switch KM1_2 is disconnected, and the fourth relay KA12_1 and the fifth relay KA13_1 are also de-energized, and the self-locking circuits of the fourth relay KA12_1 and the fifth relay KA13_1 are also disconnected, and the port 18 of the frequency converter UF1 loses power at the same time, so the left feeder 100 and the frequency converter UF1 are de-energized at the same time, and the feeder 100 stops feeding immediately. At the same time, the heat dissipation fan also stops working.

[0097] The feeding machine also includes a scraper plate. When the feeding shovel is feeding, it needs to be linked with the scraper plate, that is, the cylinder drives the scraper plate to rise when the feeding shovel moves forward and falls when it moves backward. The specific implementation steps are as follows:

[0098] When the first proximity switch SP1 is turned on, the first relay KA41_1 is energized, the first relay switch KA41_2 is closed, the single electric control solenoid valve DT1 is energized, and the cylinder drives the scraper plate to rise; at the same time, the normally open first relay switch KA41_2 is closed, and the signal is transmitted to the DI board of the DCS system.

[0099] When the proximity switch SP1 is disconnected, the first relay KA41_1 loses power, the first relay switch KA41_2 is disconnected, the single electric control solenoid valve DT1 loses power, and the cylinder drives the scraper plate to fall.

[0100] When the self-reset stop button SS1a is pressed, the fourth relay KA12_1 loses power and the fourth relay switch KA12_2 is disconnected; at this time, the state of the second proximity switch SP2 is first detected. Only when the second proximity switch SP2 changes from open to closed (that is, when the feeding shovel is in the last position of the movement), the second relay KA42 is energized, and then the second relay switch KA42_2 is disconnected, so the fifth relay KA13_1 loses power, the self-locking circuit of the fifth relay KA13_1 is disconnected, and the port 18 of the inverter UF1 loses power. At this time, the inverter UF1 and the engine MA1 of the left feeder stop working. At the same time, the heat dissipation machine also stops working.

[0101] When the emergency stop button SE1 (not reset) is pressed, the first contactor KM1_1 loses power, the first contactor switch KM1_2 is disconnected, and the fourth relay KA12_1 and the fifth relay KA13_1 also lose power, and the self-locking circuits of the fourth relay KA12_1 and the fifth relay KA13_1 are also disconnected, and the port 18 of the frequency converter UF1 loses power at the same time, so the left feeder 100 and the frequency converter UF1 are powered off at the same time, and the feeder stops feeding immediately. At the same time, the heat dissipation fan MA1a also stops working. The right feeder 200 and the left feeder 100 are provided with exactly the same circuit, and the stopping process of pressing the self-reset stop button SF1a and the emergency stop button SS1a in the right feeder 200 is exactly the same as that of the left feeder 100, which will not be repeated here.

[0102] When the on-site personnel operate the conversion switch SA11 and turn the conversion switch SA11 to "①--②, ⑤--⑥", the first terminal and the second terminal are connected, and the fifth terminal and the sixth terminal are connected. Figure 5 As shown, after the fifth terminal and the sixth terminal are connected, the first normally open electric shock DCS_D1 is controlled by the DCS system. There is no need to press the self-reset stop button SF1a to turn on the fifth relay KA12_1. The opening and closing of the first normally open electric shock DCS_D1 is directly used to control the on and off of the fifth relay KA12_1. At this time, the start-stop control circuit is in the "DCS operation state".

[0103] When "①--②" is closed, the third relay KA11_1 is energized, the corresponding normally open third relay switch KA11_1 is closed, and the signal is transmitted to the DCS system DI board.

[0104] Furthermore, when the first normally open contact DCS_D1 is closed (self-reset inching closed), the coil of the fifth relay KA12_1 is energized, and then the fifth relay switch KA12_2 is closed, and the circuit of the fifth relay KA12_1 is self-locked. The subsequent "chain" reaction is the same as the case of manually pressing the self-reset stop button SF1a, so it will not be repeated here.

[0105] It can be seen that by operating the main circuit, fan control circuit, solenoid valve control circuit, start-stop control circuit, we can complete the continuous feeding and pulse feeding of the feeder, and control the closing and opening of the left clutch A, the middle clutch B and the right clutch C through the clutch control circuit to control the independent transmission and linkage transmission of the left feeder 100 and the right feeder 200. When any of the feeders fails, the operator can realize the "linkage transmission" through the "clutch control circuit", so that any feeder can drive two feeding shovels to feed at the same time, and still ensure the stable delivery of the feed amount, and ensure the stable production of the glass factory.

[0106] In order to prevent damage to the equipment caused by human error in operating the "left, middle and right clutches fully closed", a chain protection circuit is set in the clutch control circuit. In "linked transmission", the middle clutch B remains closed, and only one of the left clutch A and the right clutch C can be closed at the same time. At this time, the two feeders can rotate asynchronously to avoid damage to the universal joint or the feeder.

[0107] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A control system for an inclined blanket feeder in a glass factory, characterized in that: The feeder comprises a left feeder and a right feeder, and the left feeder and the right feeder are connected and driven by a universal joint; comprising: Power supply, connected to the engine of the feeder through the main circuit; A solenoid valve control circuit, connected to the solenoid valve of the feeder and the power supply, for controlling the opening and closing of the solenoid valve to drive the lifting and lowering of the scraper plate of the feeder; A start-stop control circuit, connected to the main circuit, is used to control the engine to start to achieve continuous feeding, and to control the engine to switch between starting and stopping at a set time interval to achieve pulse feeding; The clutch control circuit is connected to the clutch in the feeder and is used to control the on and off of the clutch so that the left feeder and the right feeder are switched between independent transmission and linkage transmission states.

2. The control system according to claim 1, characterized in that: The main circuit comprises: A first circuit breaker, one end of which is connected to the power supply, the other end of which is connected to the frequency converter via a first contactor switch, and the other end of which is also connected to the start-stop control circuit; The first port, the second port, the fourth port, the fifth port, the thirty-seventh port, the eighteenth port and the twelfth port of the frequency converter are connected to the start-stop control circuit, the fifty-fourth port and the fifty-fifth port of the frequency converter receive the frequency conversion signal of the external distributed control system, and the thirty-ninth port and the forty-second port of the frequency converter send a feedback signal to the distributed control system; The engine is connected to a three-phase electrical output port and a grounding port of the inverter.

3. The control system according to claim 1, characterized in that: The solenoid valve control circuit comprises: a third circuit breaker, one end of the third circuit breaker being connected to the power supply, the other end of the third circuit breaker being connected to the input end of the DC-AC converter, the positive terminal of the DC-AC converter being connected to the positive poles of the first proximity switch and the second proximity switch, and also connected to the positive pole of the solenoid valve through the first relay switch, and the negative terminal of the DC-AC converter being connected to the negative pole of the first proximity switch, the negative pole of the second proximity switch and the negative pole of the solenoid valve; The output end of the first proximity switch is connected to the negative terminal of the DC-AC converter via a first relay, and the output end of the second proximity switch is connected to the negative terminal of the DC-AC converter via a second relay.

4. The control system according to claim 2, characterized in that: The start-stop control circuit comprises: a second circuit breaker, one end of the second circuit breaker being connected to the main circuit, the other end of the second circuit breaker being connected to the first, third, fifth and seventh terminals of the transfer switch, the fourth terminal of the transfer switch being connected to the local operation indicator light, the second terminal of the transfer switch being connected to the third relay, and the eighth terminal of the transfer switch being connected in series in sequence to a self-reset button, a self-reset stop button, a first normally closed contact, the first contactor switch and a fourth relay; One end of a fourth relay switch is connected to the other end of the second circuit breaker, the other end of the fourth relay switch is connected to a fifth relay through the first contactor switch, one end of the fifth relay switch is connected to the other end of the second circuit breaker, the other end of the fifth relay switch is connected to one end of the second relay switch, and the other end of the second relay switch is connected to the other end of the fourth relay switch; One end of the fifth relay switch is connected to the eighteenth port of the frequency converter, and the other end of the fifth relay switch is connected to the thirty-seventh port and the twelfth port of the frequency converter; The first port of the frequency converter is connected to one end of the second circuit breaker, and the second port of the frequency converter is connected to the sixth relay; One end of the sixth relay switch is connected to the other end of the second circuit breaker, and the other end of the sixth relay switch is connected to the operation indicator light.

5. The control system according to claim 4, characterized in that: Also includes alarm circuit: The fourth port of the frequency converter is connected to one end of the second circuit breaker, and the fifth port of the frequency converter is connected to the seventh relay; Then a seventh relay switch is also connected between the first contactor switch and the fourth relay.

6. The control system according to claim 1, characterized in that: It also includes a fan control circuit, which is connected to the fan of the feeder and the power supply and is used to control the fan to dissipate heat; the fan control circuit includes: a fourth circuit breaker, one end of the fourth circuit breaker being connected to the power supply, the other end of the fourth circuit breaker being connected to one end of a second contactor switch, the other end of the second contactor switch being connected to the fan through a thermal relay, and the fan being further connected to a ground wire of the power supply; The start-stop control circuit also includes a fan start subcircuit, including a fifth relay switch, one end of the fifth relay switch is connected to the main circuit, the other end of the fifth relay switch is connected to one end of the thermal relay, and the other end of the thermal relay is connected to the second contactor.

7. The control system according to claim 4, characterized in that: The start-stop control circuit also includes an emergency stop subcircuit, including: An emergency stop button is connected to the other end of the second circuit breaker and the first contactor coil.

8. The control system according to claim 7, characterized in that: The clutch includes a left clutch, a middle clutch and a right clutch, and the clutch control circuit includes: A fifth circuit breaker, one end of the fifth circuit breaker is connected to the power supply, the other end of the fifth circuit breaker is respectively connected to one end of the first travel switch to the sixth travel switch, the other ends of the first travel switch to the sixth travel switch are respectively connected to the eighth relay to the thirteenth relay, and the eighth relay to the thirteenth relay are connected to the power supply; A ninth relay switch, an eleventh relay switch, a thirteenth relay switch and a fourteenth relay are connected in series in sequence between the other end of the fifth circuit breaker and the power supply.

9. The control system according to claim 8, characterized in that: A fourteenth relay switch is also connected between the emergency stop button and the contactor coil in the emergency stop sub-circuit.

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