Double-electromagnetic-valve circuit control system and method of bidirectional pneumatic door

Abstract

The invention discloses a double-electromagnetic-valve circuit control system and method for a bidirectional pneumatic door, belongs to the field of bidirectional pneumatic door control, and solves the technical problem that the operation of a whole pneumatic system is affected due to frequent faults of electromagnetic reversing valves of the bidirectional pneumatic door. According to the invention, two sets of relays are used for respectively controlling opening electromagnetic valve coils on the side A and the side B of the bidirectional pneumatic door, respectively controlling closing electromagnetic valve coils on the side A and the side B of the bidirectional pneumatic door, respectively controlling in-place opening signals on the side A and the side B of the bidirectional pneumatic door, and respectively controlling in-place closing signals on the side A and the side B of the bidirectional pneumatic door; on or off pulse signals are simultaneously sent to the electromagnetic valves on the two sides based on a relay with a self-holding function; bidirectional independent control of the bidirectional pneumatic door is achieved, mutual interference is avoided, and stable and reliable operation of the pneumatic door is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of bidirectional pneumatic door control, and in particular relates to a double-electromagnetic valve circuit control system and method for a bidirectional pneumatic door. Background Art

[0002] In industrial production environments, bidirectional pneumatic doors are an important type of automation equipment. With the continuous expansion of the market and the advancement of technology in recent years, their application scope has become increasingly wide. However, although this equipment has brought many conveniences to improving production efficiency, it also faces some technical challenges. In particular, due to the frequent failure of the electromagnetic reversing valve, the control system of the bidirectional pneumatic door has become unreliable, increasing maintenance costs and affecting the normal operation of the production line.

[0003] In the prior art, researchers have attempted to improve the stability of bidirectional pneumatic doors by improving the design of electromagnetic reversing valves. However, in practical applications, these improvement measures often fail to completely solve the problems caused by electromagnetic reversing valves. Specifically, electromagnetic reversing valves may cause overheating, wear, or internal foreign matter blockage due to long-term operation. These problems may cause the valve to respond slowly or fail to switch the airflow direction normally, thereby affecting the normal operation of the entire pneumatic system. Therefore, the present invention provides a dual electromagnetic valve circuit control system and method for a bidirectional pneumatic door. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a dual solenoid valve circuit control system and method for a two-way pneumatic door, which is used to solve the technical problem of frequent failures of the solenoid reversing valve of the two-way pneumatic door, affecting the operation of the entire pneumatic system.

[0005] To achieve the above-mentioned object, the first aspect of the present invention provides a dual solenoid valve circuit control system for a bidirectional pneumatic door, comprising a branch solenoid main valve control module, and a power supply control module and a plug-in board in-place signal feedback module connected thereto;

[0006] The branch electromagnetic main valve control module is used to control the opening or closing of the A / B side electromagnetic valve; wherein, the branch electromagnetic main valve control module includes an A / B relay unit and an A / B side electromagnetic valve unit; the A / B relay unit includes an A / B opening relay unit and an A / B closing relay unit; the A / B side electromagnetic valve unit includes an A / B side opening electromagnetic valve unit, an A / B side closing electromagnetic valve unit and an A / B side main air valve unit; and,

[0007] The A / B opening relay unit and the A / B closing relay unit are connected in parallel, and the A / B side opening solenoid valve unit, the A / B side closing solenoid valve unit and the A / B side main air valve unit are connected in parallel;

[0008] The plug-in board in-place signal feedback module is used to feed back the in-place signal to the indicator light on the control panel; wherein the plug-in board in-place signal feedback module includes an A / B in-place relay unit and an A / B in-place indicator light unit; the A / B in-place relay unit includes an A / B open in-place relay unit and an A / B closed in-place relay unit; the A / B in-place indicator light unit includes an A / B open in-place indicator light unit, an A / B closed in-place indicator light unit and an open / close indicator light unit; and,

[0009] The A / B open position relay unit and the A / B closed position relay unit are connected in parallel, and the A / B open position indicator light unit and the A / B closed position indicator light unit are connected in parallel;

[0010] The A / B in-position relay unit is connected in series with the A / B relay unit;

[0011] The A / B in-position indicator light unit is connected in parallel with the A / B side solenoid valve.

[0012] The power control module includes a DC power supply and an on / off control button.

[0013] Preferably, the A / B on relay unit and the A / B off relay unit each include three relay terminals and a relay coil;

[0014] Three relay terminals are connected in series, one end of the series connection is connected to the relay coil, and the other end is connected to the stop button; any two relay terminals are normally closed contacts, and the other is a normally open contact; the other end of the relay coil is connected to the on / off control button;

[0015] The A / B on / off relay unit controls the A / B side on / off solenoid valve unit of the bidirectional pneumatic door respectively.

[0016] Preferably, the A / B side opening solenoid valve unit and the A / B side closing solenoid valve unit each include a relay terminal and an electromagnetic coil; the relay terminal and the electromagnetic coil are connected in series, and one end of the series connection is connected to a power supply.

[0017] Preferably, the A / B side main air valves each include two relay terminals and an electromagnetic coil; the two relay terminals are connected in parallel, one end of the parallel connection is connected to the electromagnetic coil, and the other end is connected to the power supply.

[0018] Preferably, the A / B open position relay unit and the A / B closed position relay unit each include a limit proximity switch and a relay coil; one end of the limit proximity switch is connected to the relay coil, and the other end is connected to the power supply.

[0019] Preferably, the A / B open position indicator light unit includes an A open indicator light and a B open indicator light, and the A / B closed position indicator light unit includes an A closed indicator light and a B closed indicator light; the relay terminal controls the corresponding indicator light display.

[0020] Preferably, the second aspect of the present invention provides a dual solenoid valve circuit control method for a bidirectional pneumatic door, comprising:

[0021] The power supply is controlled by the on / off control button. After the relay A / B is energized, the solenoid valve on the A / B side opens / closes the air supply, and the solenoid reversing valve works. The relay is locked to realize the self-holding when the door is opened, and the door stops automatically when it reaches the position. In the on / off operation state, the wrong operation of the close button will not cause erroneous action;

[0022] The operation signal is sent to the indicator light unit by turning on the A-side relay or turning off the A-side relay and turning on the B-side relay or turning off the B-side relay, and the corresponding indicator light unit lights up.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention controls the opening solenoid valve coils of the A side and the B side of the two-way pneumatic door respectively through two sets of relays, controls the closing solenoid valve coils of the A side and the B side of the two-way pneumatic door respectively, controls the opening position signals of the A side and the B side of the two-way pneumatic door respectively, and controls the closing position signals of the A side and the B side of the two-way pneumatic door respectively; based on the relays with self-holding function, the open or closed pulse signals are sent to the solenoid valves on both sides at the same time; when the pneumatic door needs to be opened or closed, the relay activates the corresponding self-holding circuit, thereby driving the solenoid valve to work and open or close the door; and the status information of the pneumatic door on each side is fed back to the control system, and when one side is in place, the system cuts off the power supply of the solenoid valve on the corresponding side and the corresponding branch main valve according to the feedback signal to ensure that the door on this side stops moving; realizes the automatic control function of "which side stops when the door is in place", two-way independent control, no interference, and the open and close position signals are displayed respectively, thereby improving the efficiency and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0027] Figure 2The schematic diagram of the double solenoid valve circuit control system of the bidirectional pneumatic door of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 , the first aspect of the present invention provides a dual solenoid valve circuit control system for a bidirectional pneumatic door, including a branch solenoid main valve control module, and a power control module and a plug-in board in place signal feedback module connected thereto;

[0030] The power control module includes a power supply and an on / off control button; wherein the power supply includes a 220V AC, two fuses, a power indicator light and a voltage converter; the on / off control button includes an on button SB1, an off button SB2 and a remote control button SA;

[0031] The branch solenoid master valve control module controls the opening or closing of the A / B side solenoid valve;

[0032] Among them, the branch electromagnetic main valve control module includes an A / B relay unit and an A / B side electromagnetic valve unit; the A / B relay unit includes an A / B open relay unit and an A / B close relay unit; the A / B side electromagnetic valve unit includes an A / B side open electromagnetic valve unit, an A / B side close electromagnetic valve unit and an A / B side main air valve unit; and,

[0033] The A / B opening relay unit and the A / B closing relay unit are connected in parallel, and the A / B side opening solenoid valve unit, the A / B side closing solenoid valve unit and the A / B side main air valve unit are connected in parallel;

[0034] See also Figure 2 Specifically, A opens the relay unit: the normally closed contact of the relay terminal KA5-10, the normally closed contact of the relay terminal KA3-2 and the normally open contact of the relay terminal KA1-9 are connected in series, and one end of the series connection is connected to the relay coil KA1;

[0035] A. Relay unit: the normally closed contact of relay terminal KA7-10, the normally closed contact of relay terminal KA1-2 and the normally open contact of relay terminal KA3-9 are connected in series, and one end of the series connection is connected to the relay coil KA3;

[0036] B open relay unit: the normally closed contact of relay terminal KA6-10, the normally closed contact of relay terminal KA4-2 and the normally open contact of relay terminal KA2-9 are connected in series, and one end of the series connection is connected to the relay coil KA2;

[0037] B off relay unit: the normally closed contact of relay terminal KA8-10, the normally closed contact of relay terminal KA2-2 and the normally open contact of relay terminal KA4-9 are connected in series, and one end of the series connection is connected to the relay coil KA2;

[0038] The other ends of the relay coil KA1, the relay coil KA2, the relay coil KA3 and the relay coil KA4 are all connected to the power supply.

[0039] A side open solenoid valve unit: one end of the normally open contact of the relay terminal KA1-12 is connected to the electromagnetic coil YV1, and the other end is connected to the power supply;

[0040] A side closing solenoid valve unit: one end of the normally open contact of the relay terminal KA3-12 is connected to the electromagnetic coil YV3, and the other end is connected to the power supply;

[0041] B side open solenoid valve unit: one end of the normally open contact of the relay terminal KA2-12 is connected to the electromagnetic coil YV2, and the other end is connected to the power supply;

[0042] B side closing solenoid valve unit: one end of the normally open contact of the relay terminal KA4-12 is connected to the electromagnetic coil YV4, and the other end is connected to the power supply;

[0043] Main air valve unit on side A: The normally open contact of relay terminal KA1-11 is connected in parallel with the normally open contact of relay terminal KA3-11, one end of the parallel connection is connected to the electromagnetic coil YV5, and the other end is connected to the power supply;

[0044] Main air valve unit on side B: The normally open contact of relay terminal KA2-11 is connected in parallel with the normally open contact of relay terminal KA4-11, one end of the parallel connection is connected to the electromagnetic coil YV6, and the other end is connected to the power supply.

[0045] The on / off status of the A-side solenoid valve and the B-side solenoid valve is controlled as follows:

[0046] The solenoid valve for opening the plug door is started by the open button SB1 on the control panel or the remote control button SA; the self-holding circuit on the A side enters the normally open contact of the relay terminal KA1-9 through the normally closed contacts of the relay terminals KA5-10 and KA3-2 to the relay coil KA1; the self-holding circuit on the B side enters the normally open contact of the relay terminal KA2-9 through the normally closed contacts of the relay terminals KA6-10 and KA4-2 to the relay coil KA2; after the relay coil KA1 and the relay coil KA2 are energized, the solenoid main valve on the A side and the solenoid main valve on the B side open the air supply, and the solenoid reversing valve works. The self-holding can be started when the door is opened through the relay lock, and it stops automatically when it is in place. No erroneous operation of the close button in the open running state will cause any erroneous action.

[0047] The closing solenoid valve of the plug door is started by the closing button SB2 on the control panel or the remote control button SA; the self-holding circuit on the A side enters the normally open contact of the relay terminal KA3-9 through the normally closed contacts of the relay terminals KA7-10 and KA1-2 to the relay connected coil KA3; the self-holding circuit on the B side enters the normally open contact of the relay terminal KA4 through the normally closed contacts of the relay terminals KA8-10 and KA2-2 to the relay connected coil KA4; after the relay coil KA3 and the relay coil KA4 are energized, the solenoid main valve on the A side and the solenoid main valve on the B side close the air supply, and the solenoid reversing valve starts to work. The self-holding can be started when the door is opened through the relay lock, and it automatically stops when it is in place. No erroneous operation of the open button in the closed operating state will cause any erroneous action.

[0048] The plug-in board in-place signal feedback module feeds back the in-place signal to the indicator light on the control panel;

[0049] Among them, the plug-in board in-place signal feedback module includes an A / B in-place relay unit and an A / B in-place indicator light unit; the A / B in-place relay unit includes an A / B open in-place relay unit and an A / B closed in-place relay unit; the A / B in-place indicator light unit includes an A / B open in-place indicator light unit, an A / B closed in-place unit and an open / close indicator light unit; and,

[0050] The A / B open position relay unit and the A / B closed position relay unit are connected in parallel, and the A / B open position indicator light unit and the A / B closed position indicator light unit are connected in parallel;

[0051] It should be noted that the A / B in-place relay unit is connected in series with the A / B relay unit; the A / B in-place indicator light unit is connected in parallel with the A / B side solenoid valve.

[0052] See also Figure 2 , specifically, A is opened to the position relay unit: one end of the limit proximity switch SQ1 is connected to the relay coil KA5, and the other end is connected to the power supply;

[0053] A Closed relay unit: one end of the limit proximity switch SQ3 is connected to the relay coil KA7, and the other end is connected to the power supply;

[0054] B open position relay unit: one end of the limit proximity switch SQ2 is connected to the relay coil KA6, and the other end is connected to the power supply;

[0055] B Closed relay unit: One end of the limit proximity switch SQ4 is connected to the relay coil KA8, and the other end is connected to the power supply.

[0056] Turn on the indicator light unit: one end of the relay terminal KA1-12 is connected to the indicator light H1, and the other end is connected to the power supply;

[0057] Turn off the indicator light unit: one end of the relay terminal KA3-12 is connected to the indicator light H2, and the other end is connected to the power supply;

[0058] A open position unit: one end of the relay terminal KA5-11 is connected to the indicator light H3, and the other end is connected to the power supply;

[0059] A Closed Unit: One end of the relay terminal KA7-11 is connected to the indicator light H5, and the other end is connected to the power supply;

[0060] B open position unit: one end of the relay terminal KA6-11 is connected to the indicator light H4, and the other end is connected to the power supply;

[0061] B Closed unit: One end of the relay terminal KA8-11 is connected to the indicator light H6, and the other end is connected to the power supply.

[0062] Among them, the relay terminal controls the corresponding indicator light display.

[0063] It should be noted that KA1-2, KA1-9, KA1-11, and KA1-12 are a set of designated dry contacts on the KA1 relay;

[0064] KA2-2, KA2-9, KA2-11, and KA2-12 are a set of designated dry contacts on the KA2 relay;

[0065] KA3-2, KA3-9, KA3-11, and KA3-12 are a set of designated dry contacts on the KA3 relay;

[0066] KA4-2, KA4-9, KA4-11, and KA4-12 are a set of designated dry contacts on the KA4 relay;

[0067] KA5-10 and KA5-11 are a set of designated dry contacts on the KA5 relay;

[0068] KA6-10 and KA6-11 are a set of designated dry contacts on the KA6 relay;

[0069] KA7-10 and KA7-11 are a set of designated dry contacts on the KA7 relay;

[0070] KA8-10 and KA8-11 are a set of designated dry contacts on the KA8 relay.

[0071] The working process of the indicator light is as follows:

[0072] When the door is opened (or closed), the pulse signal is sent to the open indicator light on the control panel by opening the A-side relay coil KA1 (or closing the A-side relay coil KA3) and opening the B-side relay coil KA2 (or closing the B-side relay coil KA4);

[0073] Among them, if the relay coil KA5 is in place after the A side (QS1) is opened, the A side open position indicator light will be on; if the relay coil KA6 is in place after the B side (SQ2) is opened, the B side open position indicator light will be on; if the relay coil KA7 is in place after the A side (SQ3) is closed, the A side closed position indicator light will be on; if the relay coil KA8 is in place after the B side (SQ4) is closed, the B side closed position indicator light will be on.

[0074] It should be noted that the dual solenoid valve control of the two-way pneumatic door can be manually operated on-site or remotely operated through the centralized control center; the in-place status of the two-way pneumatic door is displayed on the control panel through the in-place indicator light, and the in-place signal can be connected to the remote control room through the wiring terminal.

[0075] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A dual solenoid valve circuit control system for a bidirectional pneumatic door, characterized in that: It includes a branch electromagnetic main valve control module, a power supply control module connected thereto, and a plug-in board in place signal feedback module; The branch electromagnetic main valve control module is used to control the opening or closing of the A / B side electromagnetic valve; wherein, the branch electromagnetic main valve control module includes an A / B relay unit and an A / B side electromagnetic valve unit; the A / B relay unit includes an A / B opening relay unit and an A / B closing relay unit; the A / B side electromagnetic valve unit includes an A / B side opening electromagnetic valve unit, an A / B side closing electromagnetic valve unit and an A / B side main air valve unit; and, The A / B opening relay unit and the A / B closing relay unit are connected in parallel, and the A / B side opening solenoid valve unit, the A / B side closing solenoid valve unit and the A / B side main air valve unit are connected in parallel; The plug-in board in-place signal feedback module is used to feed back the in-place signal to the indicator light on the control panel; wherein the plug-in board in-place signal feedback module includes an A / B in-place relay unit and an A / B in-place indicator light unit; the A / B in-place relay unit includes an A / B open in-place relay unit and an A / B closed in-place relay unit; the A / B in-place indicator light unit includes an A / B open in-place indicator light unit, an A / B closed in-place indicator light unit and an open / close indicator light unit; and, The A / B open position relay unit and the A / B closed position relay unit are connected in parallel, and the A / B open position indicator light unit and the A / B closed position indicator light unit are connected in parallel; The A / B in-position relay unit is connected in series with the A / B relay unit; The A / B in-position indicator light unit is connected in parallel with the A / B side solenoid valve; The power control module includes a DC power supply and an on / off control button.

2. A dual solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1, characterized in that: The A / B on relay unit and the A / B off relay unit each include three relay terminals and a relay coil; Three relay terminals are connected in series, one end of the series connection is connected to the relay coil, and the other end is connected to the stop button; any two relay terminals are normally closed contacts, and the other is a normally open contact; the other end of the relay coil is connected to the on / off control button; The A / B on / off relay unit controls the A / B side on / off solenoid valve unit of the bidirectional pneumatic door respectively.

3. A dual solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1, characterized in that: The A / B side opening solenoid valve unit and the A / B side closing solenoid valve unit each include a relay terminal and an electromagnetic coil; the relay terminal and the electromagnetic coil are connected in series, and one end of the series connection is connected to a power source.

4. The double solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1 is characterized in that: The A / B side main air valves each include two relay terminals and an electromagnetic coil; the two relay terminals are connected in parallel, one end of the parallel connection is connected to the electromagnetic coil, and the other end is connected to a power source.

5. The double solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1 is characterized in that: The A / B open position relay unit and the A / B closed position relay unit both include a limit proximity switch and a relay coil; one end of the limit proximity switch is connected to the relay coil, and the other end is connected to the power supply.

6. A dual solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1, characterized in that: The A / B fully open indicator light unit includes an A open indicator light and a B open indicator light, and the A / B fully closed indicator light unit includes an A closed indicator light and a B closed indicator light; the relay terminal controls the corresponding indicator light display.

7. A dual solenoid valve circuit control system for a bidirectional pneumatic door according to claim 1, characterized in that: The dual solenoid valve circuit control method comprises: The power supply is controlled by the on / off control button. After the relay A / B is energized, the solenoid valve on the A / B side opens / closes the air supply, and the solenoid reversing valve works. The relay is locked to realize the self-holding when the door is opened, and the door stops automatically when it reaches the position. In the on / off operation state, the wrong operation of the close button will not cause erroneous action; The operation signal is sent to the indicator light unit by turning on the A-side relay or turning off the A-side relay and turning on the B-side relay or turning off the B-side relay, and the corresponding indicator light unit lights up.

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