Fuel electric control device

Abstract

This utility model discloses a fuel electrical control device, including an execution module, an output module, a control module, and a signal module, which are connected sequentially. The output module includes a first fuse 1RD and a second fuse 2RD. The first end of the first fuse 1RD is connected to the execution module, and the second end of the first fuse 1RD is connected to the first end of a primary intermediate relay 1ZJ and a secondary intermediate relay 2ZJ. The second ends of the primary intermediate relay 1ZJ and the secondary intermediate relay 2ZJ are respectively connected to the first ends of a primary contactor 1C and a secondary contactor 2C. The second ends of the primary contactor 1C and the secondary contactor 2C are both connected to the first end of the second fuse 2RD. The second end of the second fuse 2RD is connected to the execution module, and the second end of the first fuse 1RD is also connected to the control module.

Description

Technical Field

[0001] This utility model belongs to the field of fuel supply control technology for petroleum production equipment, and specifically relates to a fuel electrical control device. Background Technology

[0002] In daily life and various production enterprises, especially in oil production facilities, the amount of fuel required for the operation of various heating furnaces is very large. During the supply of this fuel, due to the misalignment of the transistor proximity switch and the induction stop, the transistor proximity switch does not operate, and the status relay cannot send a status signal to the programmable controller. This leads to repeated loss of status signals in the fuel supply, causing faults such as belt skipping, resulting in unstable gas supply, fluctuating combustion volume, and fluctuating heating temperature. This causes repeated fluctuations in the pressure and temperature of the heating medium, which seriously affects product quality, equipment operation, and service life.

[0003] The drawbacks of the existing process:

[0004] 1. The fuel supply line consists of pipes, baffle valves, and other components. The electrical control mainly controls the baffle valves. If the fuel supply repeatedly experiences status signal loss and the baffle valve is subjected to a large impact, the flap displacement linkage push rod will cause the transistor proximity switch to misalign with the sensing stop, resulting in the transistor proximity switch not activating. Consequently, the status relay cannot send a status signal to the programmable controller, leading to repeated status signal loss in the fuel supply.

[0005] 2. The transistor proximity switch has high sensitivity; it activates when the contact area between the transistor proximity switch and the sensing stop is within 1 / 3 of the contact area, sending a stop command to the push rod motor. This ensures that the baffle valve loses its signal if it is slightly displaced when subjected to a large impact from falling coal. Utility Model Content

[0006] The purpose of this utility model is to provide a fuel electrical control device that ensures that the contact positions of the transistor proximity switch and the induction stop are perfectly aligned. As long as the displacement of the push rod does not exceed the standard specified value, the transistor proximity switch will always remain on, and the programmable signal will not be interrupted. This overcomes the shortcomings of the existing technology, where the transistor proximity switch does not operate due to the misalignment of the transistor proximity switch and the induction stop, and the status relay cannot send a status signal to the programmable control, resulting in repeated loss of status signals in the fuel supply of production enterprises and causing belt skipping faults.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A fuel electrical control device,

[0009] It includes an execution module, an output module, a control module, and a signal module connected in sequence;

[0010] The output module includes a first fuse 1RD and a second fuse 2RD. The first terminal of the first fuse 1RD is connected to the execution module. The second terminal of the first fuse 1RD is connected to the first terminal of intermediate relay 1ZJ and intermediate relay 2ZJ. The second terminals of intermediate relay 1ZJ and intermediate relay 2ZJ are respectively connected to the first terminals of contactor 1C and contactor 2C. The second terminals of contactor 1C and contactor 2C are both connected to the first terminal of the second fuse 2RD. The second terminal of the second fuse 2RD is connected to the execution module. The second terminal of the first fuse 1RD is also connected to the control module, which is connected to the signal module.

[0011] Furthermore, the control module includes a first-hand automatic selection switch BK1 and a second-hand automatic selection switch BK2;

[0012] The second terminal of the first fuse 1RD is connected to the first terminal of the first manual automatic selector switch BK1 and the first terminal of the second manual automatic selector switch BK2; the second terminal of the first manual automatic selector switch BK1 is connected to the first terminal of the A-way button 1HA and the first terminal of the B-way button 2HA; the first terminal of the second manual automatic selector switch BK2 is connected to the first terminal of the A-way programmable contact 1HJ and the first terminal of the B-way programmable contact 2HJ; the second terminal of the A-way button 1HA is connected to the second terminal of the A-way programmable contact 1HJ and the first terminal of the A-way intermediate relay 1ZJ; the second terminal of the B-way button 2HA is connected to the second terminal of the B-way programmable contact 2HJ and the first terminal of the B-way intermediate relay 2ZJ; the second terminal of the A-way programmable contact 1HJ is also connected to a first power-off delay relay. The first end of the device 1SJ and the second end of the B-channel programmable contact 2HJ are also connected to the first end of the second power-off delay relay 2SJ; the second end of the A-channel intermediate relay 1ZJ is connected to the second end of the first power-off delay relay 1SJ and the first end of the A-channel position relay AWJ. The second end of the A-channel position relay AWJ is sequentially connected to the B-channel contactor 2C, the stop button TA, and the thermal relay RJ. The thermal relay RJ is connected to the execution module; the second end of the B-channel intermediate relay 2ZJ is connected to the second end of the second power-off delay relay 2SJ and the first end of the B-channel position relay BWJ. The second end of the B-channel position relay BWJ is connected to one end of the A-channel contactor 1C, and the other end of the A-channel contactor 1C is connected to the thermal relay RJ and the execution module.

[0013] Furthermore, the signal module includes six branches. Branch 1 connects the second terminal of the second-hand automatic selector switch BK2 to the A-way position relay AWJ, the A-way indicator 1HD, the control module, and the execution module in sequence. Branch 2 connects the second terminal of the second-hand automatic selector switch BK2 to the B-way position relay BWJ, the B-way indicator 1LD, the control module, and the execution module in sequence. Branch 3 connects the second terminal of the second-hand automatic selector switch BK2 to the A-way proximity switch limit SA1, the A-way position relay AWJ, the control module, and the execution module in sequence. Branch 4 connects the second terminal of the second-hand automatic selector switch BK2 to the B-way proximity switch limit SA3, the B-way position relay BWJ, the control module, and the execution module. Branch 5 connects the second terminal of the second-hand automatic selector switch BK2 to the A-way contactor 1C, the A-way running indicator HD, the control module, and the execution module. Branch 6 connects the second terminal of the second-hand automatic selector switch BK2 to the B-way contactor 2C, the B-way running indicator LD, the control module, and the execution module.

[0014] Furthermore, the execution module includes a three-phase AC motor M3, a thermal relay RJ, a contactor 1C for the first phase, a contactor 2C for the second phase, a knife fuse switch QS, and a power supply N;

[0015] The three terminals of the three-phase AC motor M3 are connected to the three terminals of the knife-fuse switch QS via thermal relay RJ and contactor 1C, respectively. The other three terminals of the knife-fuse switch QS are connected to power supply A, power supply B, and power supply C, respectively. The first terminal of contactor 1C of power supply A is connected to contactor 2C of power supply B, which is then connected to the second terminal of contactor 1C of power supply B. The first terminal of contactor 1C of power supply B is connected to contactor 2C of power supply B, which is then connected to the second terminal of contactor 1C of power supply A. Contactor 1C of power supply C is connected to contactor 2C of power supply B in parallel. Power supply N is connected to the control module and the signal module.

[0016] Furthermore, the first end of the first fuse 1RD is connected to the power supply A of the execution module, and the second end of the first fuse 1RD is connected to the output module, the control module and the signal module in sequence.

[0017] Furthermore, the second terminal of the second fuse 2RD is connected to the power supply C of the execution module, and the first terminal of the second fuse 2RD is connected to the second terminal of the A-type contactor 1C and the second terminal of the B-type contactor 2C of the output module.

[0018] Furthermore, the intermediate relay 1ZJ for channel A and the intermediate relay 2ZJ for channel B are respectively connected in parallel with a first power-off delay relay 1SJ and a second power-off delay relay 2SJ.

[0019] Furthermore, the A-type push button 1HA and the A-type programmable contact 1HJ are respectively connected in parallel with A-type intermediate relays 1ZJ.

[0020] Furthermore, the B-channel button 2HA and the B-channel programmable contact 2HJ are respectively connected in parallel with B-channel intermediate relays 2ZJ.

[0021] Furthermore, the A-channel proximity switch limit position SA2 is connected in parallel to the A-channel proximity switch limit position SA1, and the B-channel proximity switch limit position SA3 is connected in parallel to the B-channel proximity switch limit position SA4.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] This utility model provides a fuel electrical control device that ensures that the contact position of the transistor proximity switch and the induction stop is perfectly aligned. As long as the displacement of the push rod does not exceed the standard specified value, the transistor proximity switch will always remain on, and the programmable signal will not be interrupted.

[0024] Specifically, a first power-off delay relay 1SJ and a second power-off delay relay 2SJ are added to the output module and control module. This ensures that after the transistor proximity switch actuates and the de-energized contacts of intermediate relays 1ZJ and 2ZJ (both for the first and second channels) open, the contactors 1C (for the first and second channels) of the execution module remain de-energized for 0.4-0.7 seconds. This allows the motor to stop only after the proximity switch and the sensing stop are fully aligned. This solves the problem of momentary signal loss caused by gaps in the flapper valve, resulting in small displacement of the push rod and the inability of the limit switch to sense the stop, as well as significant vibration of the flapper valve due to excessive fuel.

[0025] This invention is suitable for electrical control of various heating facilities and fuel supplies. It is very effective, solves problems, eliminates safety hazards, reduces labor intensity, saves costs, and avoids adverse effects on equipment, facilities, and products. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a fuel electrical control device according to an embodiment of the present invention. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] like Figure 1 As shown in the diagram, a fuel electrical control device includes an execution module, an output module, a control module, and a signal module connected in sequence. The execution module is the power output part of the entire fuel electrical control device, mainly responsible for converting electrical energy into mechanical energy to drive the operation of related equipment. The execution module includes a three-phase AC motor M3, a thermal relay RJ, a contactor 1C (A-type), a contactor 2C (B-type), a knife-fuse switch QS, and a power supply N. The three terminals of the three-phase AC motor M3 are connected to the three terminals of the knife-fuse switch QS via the thermal relay RJ and the contactor 1C. The other three terminals of the knife-fuse switch QS are connected to power supplies A, B, and C. The first terminal of the contactor 1C in power supply A is connected to the contactor 2C in power supply B, and the second terminal of the contactor 1C in power supply B is connected to the contactor 1C in power supply A. The first terminal of the contactor 1C in power supply B is connected to the contactor 2C in power supply B, and the contactor 1C in power supply C is connected in parallel with the contactor 2C. The power supply N connects to the control module and the signal module. The three-phase AC motor M3, as a power device, is connected to the power supply via the thermal relay RJ, the contactor 1C, and the contactor 2C, enabling the start, stop, and forward / reverse control of the three-phase AC motor M3. The knife fuse switch QS serves to isolate the power supply and provide short-circuit protection, while the thermal relay RJ provides overload protection for the three-phase AC motor M3.

[0030] The output module includes a first fuse 1RD and a second fuse 2RD. The first terminal of the first fuse 1RD is connected to the power supply A of the execution module. The second terminal of the first fuse 1RD is connected to the first terminal of intermediate relay 1ZJ (A-type) and intermediate relay 2ZJ (B-type). The second terminals of intermediate relays 1ZJ and 2ZJ are respectively connected to the first terminals of contactors 1C (A-type) and 2C (B-type). The second terminals of contactors 1C and 2C are both connected to the first terminal of the second fuse 2RD. The second terminal of the second fuse 2RD is connected to the power supply C of the execution module. The second terminal of the first fuse 1RD is also connected to the control module. The first fuse 1RD and the second fuse 2RD are used for short-circuit protection to prevent damage to the circuit due to overload or short circuit. Intermediate relays 1ZJ and 2ZJ control the on / off switching of contactors 1C and 2C, thereby controlling the execution module.

[0031] The control module includes a first-hand automatic selection switch BK1 and a second-hand automatic selection switch BK2;

[0032] The second terminal of the first fuse 1RD is connected to the first terminal of the first automatic selector switch BK1 and the first terminal of the second automatic selector switch BK2; the second terminal of the first automatic selector switch BK1 is connected to the first terminal of the A-way button 1HA and the first terminal of the B-way button 2HA; the first terminal of the second automatic selector switch BK2 is connected to the first terminal of the A-way programmable contact 1HJ and the first terminal of the B-way programmable contact 2HJ.

[0033] The second terminal of the A-channel push button 1HA is connected to the second terminal of the A-channel programmable contact 1HJ and the first terminal of the A-channel intermediate relay 1ZJ. The second terminal of the B-channel push button 2HA is connected to the second terminal of the B-channel programmable contact 2HJ and the first terminal of the B-channel intermediate relay 2ZJ. The second terminal of the A-channel programmable contact 1HJ is also connected to the first terminal of the first power-off delay relay 1SJ. The second terminal of the B-channel programmable contact 2HJ is also connected to the first terminal of the second power-off delay relay 2SJ. The second terminal of the A-channel intermediate relay 1ZJ is connected to the first power-off delay relay 1SJ. The first terminal of the first-pass position relay AWJ is connected to the second terminal of the second-pass position relay AWJ. The second terminal of the second-pass position relay AWJ is sequentially connected to the second-pass contactor 2C, the stop button TA, and the thermal relay RJ. The thermal relay RJ is connected to the power supply N of the execution module. The second terminal of the second-pass intermediate relay 2ZJ is connected to the second terminal of the second power-off delay relay 2SJ and the first terminal of the second-pass position relay BWJ. The second terminal of the second-pass position relay BWJ is connected to one end of the first-pass contactor 1C. The other end of the first-pass contactor 1C is connected to the thermal relay RJ and the power supply N of the execution module. The first-pass button 1HA and the first-pass programmable contact 1HJ are each connected in parallel with the first-pass intermediate relay 1ZJ. Similarly, the second-pass button 2HA and the second-pass programmable contact 2HJ are each connected in parallel with the second-pass intermediate relay 2ZJ. The manual and automatic control modes can be switched using the first-hand automatic selection switch BK1 and the second-hand automatic selection switch BK2. The A-way button 1HA and the B-way button 2HA are used for manual control of the start of A-way and B-way, respectively. The A-way programmable contact 1HJ and the B-way programmable contact 2HJ are used for automatic control of the start of A-way and B-way. The first power-off delay relay 1SJ and the second power-off delay relay 2SJ are used to implement delay control when power is off. The A-way position relay AWJ and the B-way position relay BWJ are used to detect the position status of A-way and B-way.

[0034] Preferably, the signal module includes six branches. Branch one connects the second terminal of the second-hand automatic selector switch BK2 to the A-channel position relay AWJ, the A-channel indicator 1HD, the second terminal of the A-channel contactor 1C of the control module, one terminal of the thermal relay RJ of the control module, and the power supply N of the execution module in sequence. Branch two connects the second terminal of the second-hand automatic selector switch BK2 to the B-channel position relay BWJ, the B-channel indicator 1LD, the second terminal of the A-channel contactor 1C of the control module, one terminal of the thermal relay RJ of the control module, and the power supply N of the execution module in sequence. Branch three connects the second terminal of the second-hand automatic selector switch BK2 to the A-channel proximity switch limit switch SA1, the A-channel position relay AWJ, the second terminal of the A-channel contactor 1C of the control module, and the thermal relay RJ of the control module in sequence. Branch 1 connects to the power supply N of the execution module; Branch 4 connects to the second terminal of the second-hand automatic selector switch BK2, which is connected to the B-channel proximity switch limit switch SA3, the B-channel position relay BWJ, the second terminal of the A-channel contactor 1C of the control module, one terminal of the thermal relay RJ of the control module, and the power supply N of the execution module; Branch 5 connects to the second terminal of the second-hand automatic selector switch BK2, which is connected to the A-channel contactor 1C, the A-channel running indicator HD, the second terminal of the A-channel contactor 1C of the control module, one terminal of the thermal relay RJ of the control module, and the power supply N of the execution module; Branch 6 connects to the second terminal of the second-hand automatic selector switch BK2, which is connected to the B-channel contactor 2C, the B-channel running indicator LD, the second terminal of the A-channel contactor 1C of the control module, one terminal of the thermal relay RJ of the control module, and the power supply N of the execution module. The A-channel proximity switch limit switch SA1 is connected in parallel with the A-channel proximity switch extreme position SA2, and the B-channel proximity switch limit switch SA3 is connected in parallel with the B-channel proximity switch extreme position SA4.

[0035] Specifically, the first terminal of the first fuse 1RD of the output module is connected to the power supply A of the execution module. The second terminal of the first fuse 1RD of the output module is connected to the first terminal of the intermediate relay 1ZJ of the first channel and the first terminal of the intermediate relay 2ZJ of the second channel of the output module. It is also connected to the first terminal of the first automatic selection switch BK1 and the first terminal of the second automatic selection switch BK2 of the control module, the first terminal of the position relay AWJ of the first channel and the position relay BWJ of the second channel of the signal module, the first terminal of the limit switch SA1 of the first channel proximity switch, the first terminal of the extreme position switch SA2 of the first channel proximity switch, the first terminal of the limit switch SA3 of the second channel proximity switch, the first terminal of the extreme position switch SA4 of the second channel proximity switch, the first terminal of the contactor 1C of the first channel, and the first terminal of the contactor 2C of the second channel.

[0036] This device switches between manual and automatic modes BK using a first-hand automatic selector switch BK1 and a second-hand automatic selector switch BK2. The three-phase AC motor M3 is controlled by the A-type contactor 1C and the B-type contactor 2C of the execution module. When the three-phase AC motor M3 is controlled by the A-type contactor 1C of the execution module, it is an A-type motor; when the three-phase AC motor M3 is controlled by the B-type contactor 2C of the execution module, it is a B-type motor.

[0037] How does the BK manual / automatic selector switch work when switched to the manual position?

[0038] 1. When the proximity switch SA1 of the signal module closes, the coil of the position relay AWJ of the signal module is energized, and the light of the indicator 1HD connected to it illuminates. After the dust removal is completed, the proximity switch SA1 of the signal module opens, the coil of the position relay AWJ of the signal module is de-energized, the normally open contact of the position relay AWJ of the signal module opens, the light of the indicator 1HD of the signal module goes out, and the normally closed contact of the position relay AWJ of the signal module closes, preparing for the energization of the intermediate relay 1ZJ of the signal module.

[0039] 2. Press the A-type button 1HA of the control module, the coil of the first power-off delay relay 1SJ of the control module is energized, and the normally open contact of the first power-off delay relay 1SJ of the control module closes.

[0040] 3. When the coil of the intermediate relay 1ZJ of the control module is energized, its two sets of normally open contacts close to achieve self-locking, and the coil of the contactor 1C of the control module is energized. The main contacts of the contactor 1C of the control module close, and the motor runs. At this time, the HD light of the motor running indicator of the signal module lights up.

[0041] 4. After the fuel electrical control device reaches the unloading location, the limit switch SA3 of the signal module closes, the coil of the signal module's B-channel position relay BWJ is energized, and the B-channel indicator 1LD light illuminates. After the ash removal is completed, the limit switch SA3 of the B-channel proximity switch opens, the coil of the signal module's B-channel position relay BWJ is de-energized, the normally open contact opens, the B-channel indicator 1LD light goes out, and the normally closed contact of the signal module's B-channel position relay BWJ closes, preparing for the energization of the B-channel intermediate relay 2ZJ.

[0042] 5. Pressing the stop button TA on the control module de-energizes the coil of the first power-off delay relay 1SJ in the control module, causing its normally open contact to open after a delay. This allows the A-type contactor 1C and B-type contactor 2C of the execution module to remain de-energized for a delay of 0.4-0.7 seconds. This ensures that the motor stops working only after the transistor proximity switch and the inductive stop are fully aligned.

[0043] 6. Press the A-channel programmable contact 1HJ of the control module. The A-channel motor stops (interlocked). The coil of the second power-off delay relay 2SJ of the control module is energized, and the normally open contact of the second power-off delay relay 2SJ of the control module closes. The coil of the B-channel intermediate relay 2ZJ of the control module is energized, and the two sets of normally open contacts of the B-channel intermediate relay 2ZJ of the control module close, realizing self-locking. The coil of the B-channel contactor 2C of the control module is energized, and the main contact of the B-channel contactor 2C of the control module closes, and the motor is energized. At this time, the B-channel running indicator LD light is on.

[0044] 7. Upon reaching the dust collection point, the proximity switch SA1 of the signal module is set to limit, and the 1HD indicator light of the signal module illuminates. After dust collection is completed, the coil of the AWJ position relay of the signal module is de-energized, and the 1HD indicator light of the signal module goes out. This cycle repeats continuously.

[0045] How does the BK manual / automatic selector switch work when set to the automatic position?

[0046] 1. When the proximity switch SA1 of the signal module is closed, the coil of the position relay AWJ of the signal module is energized, and the light of the indicator 1HD of the signal module is lit. After the dust removal is completed, the proximity switch SA1 of the signal module is opened, the coil of the position relay AWJ of the signal module is de-energized, the normally open contact of the position relay AWJ of the signal module is opened, the light of the indicator 1HD of the signal module is turned off, and the normally closed contact of the position relay AWJ of the signal module is closed, preparing for the energization of the intermediate relay 1ZJ of the signal module.

[0047] 2. When the intermediate relay 1ZJ of the control module is activated, the coil of the first power-off delay relay 1SJ of the control module is energized, and the normally open contact of the first power-off delay relay 1SJ of the control module is closed.

[0048] 3. When the coil of the intermediate relay 1ZJ of the control module is energized, its two sets of normally open contacts close to achieve self-locking, and the coil of the contactor 1C of the control module is energized. The main contacts of the contactor 1C of the control module close, and the motor runs. At this time, the HD light of the motor running indicator of the signal module lights up.

[0049] 4. Upon arrival at the unloading location, the limit switch SA3 of the B-channel proximity switch of the signal module closes, the coil of the B-channel position relay BWJ of the signal module is energized, and the B-channel indicator 1LD light illuminates. After the ash removal is completed, the limit switch SA3 of the B-channel proximity switch opens, the coil of the B-channel position relay BWJ of the signal module is de-energized, the normally open contact opens, the B-channel indicator 1LD light goes out, and the normally closed contact of the B-channel position relay BWJ of the signal module closes, preparing for the energization of the B-channel intermediate relay 2ZJ.

[0050] 5. Press the stop button TA of the control module. The coil of the first power-off delay relay 1SJ of the control module is de-energized, and its normally open contact opens after a delay, allowing the A-type contactor 1C and B-type contactor 2C of the execution module to continue to be de-energized for 0.4-0.7 seconds. This ensures that the motor stops working after the transistor proximity switch and the induction stop are in complete contact position.

[0051] 6. Press the B-channel programmable contact 2HJ of the control module. The A-channel motor stops (interlocked). The coil of the second power-off delay relay 2SJ of the control module is energized, and the normally open contact of the second power-off delay relay 2SJ of the control module closes. The coil of the B-channel intermediate relay 2ZJ of the control module is energized, and the two sets of normally open contacts of the B-channel intermediate relay 2ZJ of the control module close, realizing self-locking. The coil of the B-channel contactor 2C of the control module is energized, and the main contact of the B-channel contactor 2C of the control module closes, and the motor is energized. At this time, the B-channel running indicator LD light is on.

[0052] 7. Upon reaching the dust collection point, the proximity switch SA1 of the signal module is set to limit, and the 1HD indicator light of the signal module illuminates. After dust collection is completed, the coil of the AWJ position relay of the signal module is de-energized, and the 1HD indicator light of the signal module goes out. This cycle repeats continuously.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel electric control device characterized by, The execution module, the output module, the control module and the signal module are connected in sequence. The output module comprises a first fuse 1RD and a second fuse 2RD; the first end of the first fuse 1RD is connected to the execution module, the second end of the first fuse 1RD is connected to the first end of an A-channel intermediate relay 1ZJ and the first end of a B-channel intermediate relay 2ZJ, the second end of the A-channel intermediate relay 1ZJ and the second end of the B-channel intermediate relay 2ZJ are respectively connected to the first end of an A-channel contactor 1C and the first end of a B-channel contactor 2C, the second end of the A-channel contactor 1C and the second end of the B-channel contactor 2C are both connected to the first end of the second fuse 2RD, the second end of the second fuse 2RD is connected to the execution module, the second end of the first fuse 1RD is also connected to the control module, and the control module is connected to the signal module.

2. An electrical fuel control device according to claim 1, wherein The control module comprises a first hand-automatic selection switch BK1 and a second hand-automatic selection switch BK2. The second end of the first fuse 1RD is connected to the first end of the first hand-automatic selection switch BK1 and the first end of the second hand-automatic selection switch BK2; the second end of the first hand-automatic selection switch BK1 is connected to the first end of an A-channel button 1HA and the first end of a B-channel button 2HA, and the first end of the second hand-automatic selection switch BK2 is connected to the first end of an A-channel program control contact 1HJ and the first end of a B-channel program control contact 2HJ; the second end of the A-channel button 1HA is connected to the second end of the A-channel program control contact 1HJ and the first end of the A-channel intermediate relay 1ZJ, and the second end of the B-channel button 2HA is connected to the second end of the B-channel program control contact 2HJ and the first end of the B-channel intermediate relay 2ZJ; the second end of the A-channel program control contact 1HJ is also connected to the first end of a first power-off delay relay 1SJ, and the second end of the B-channel program control contact 2HJ is also connected to the first end of a second power-off delay relay 2SJ; the second end of the A-channel intermediate relay 1ZJ is connected to the second end of the first power-off delay relay 1SJ and the first end of an A-channel position relay AWJ, the second end of the A-channel position relay AWJ is connected to the B-channel contactor 2C, a stop button TA and a thermal relay RJ in sequence, and the thermal relay RJ is connected to the execution module; the second end of the B-channel intermediate relay 2ZJ is connected to the second end of the second power-off delay relay 2SJ and the first end of a B-channel position relay BWJ, the second end of the B-channel position relay BWJ is connected to one end of the A-channel contactor 1C, and the other end of the A-channel contactor 1C is connected to the thermal relay RJ and the execution module.

3. An electrical fuel control device according to claim 2, wherein The signal module includes six branches. Branch 1 connects the second terminal of the second-hand automatic selector switch BK2 to the A-channel position relay AWJ, A-channel indicator 1HD, control module, and execution module in sequence. Branch 2 connects the second terminal of the second-hand automatic selector switch BK2 to the B-channel position relay BWJ, B-channel indicator 1LD, control module, and execution module in sequence. Branch 3 connects the second terminal of the second-hand automatic selector switch BK2 to the A-channel proximity switch limit switch SA1, A-channel position relay AWJ, control module, and execution module in sequence. Branch 4 connects the second terminal of the second-hand automatic selector switch BK2 to the B-channel proximity switch limit switch SA3, B-channel position relay BWJ, control module, and execution module. Branch 5 connects the second terminal of the second-hand automatic selector switch BK2 to the A-channel contactor 1C, A-channel running indicator HD, control module, and execution module. Branch 6 connects the second terminal of the second-hand automatic selector switch BK2 to the B-channel contactor 2C, B-channel running indicator LD, control module, and execution module.

4. An electrical fuel control device according to claim 3, wherein The execution module includes a three-phase AC motor M3, a thermal relay RJ, a contactor 1C for the first phase and a contactor 2C for the second phase, a knife fuse switch QS, and a power supply N; The three terminals of the three-phase AC motor M3 are connected to the three terminals of the knife-fuse switch QS via thermal relay RJ and contactor 1C, respectively. The other three terminals of the knife-fuse switch QS are connected to power supply A, power supply B, and power supply C, respectively. The first terminal of contactor 1C of power supply A is connected to contactor 2C of power supply B, which is then connected to the second terminal of contactor 1C of power supply B. The first terminal of contactor 1C of power supply B is connected to contactor 2C of power supply B, which is then connected to the second terminal of contactor 1C of power supply A. Contactor 1C of power supply C is connected to contactor 2C of power supply B in parallel. Power supply N is connected to the control module and the signal module.

5. An electrical fuel control device according to claim 4, wherein The first end of the first fuse 1RD is connected to the power supply A of the execution module, and the second end of the first fuse 1RD is connected to the output module, the control module and the signal module in sequence.

6. An electrical fuel control device according to claim 4, wherein The second terminal of the second fuse 2RD is connected to the power supply C of the execution module, and the first terminal of the second fuse 2RD is connected to the second terminal of the A-type contactor 1C and the second terminal of the B-type contactor 2C of the output module.

7. The fuel electrical control apparatus of claim 1 wherein, The intermediate relay 1ZJ for channel A and the intermediate relay 2ZJ for channel B are respectively connected in parallel with the first power-off delay relay 1SJ and the second power-off delay relay 2SJ.

8. The fuel electrical control apparatus of claim 2 wherein, The A-type push button 1HA and the A-type programmable contact 1HJ are respectively connected in parallel with the A-type intermediate relay 1ZJ.

9. The fuel electrical control apparatus of claim 2 wherein, The B-type push button 2HA and the B-type programmable contact 2HJ are respectively connected in parallel with B-type intermediate relays 2ZJ.

10. The fuel electrical control apparatus of claim 3 wherein, The limit position of the proximity switch SA1 is connected in parallel with the limit position of the proximity switch SA2, and the limit position of the proximity switch SA3 is connected in parallel with the limit position of the proximity switch SA4.

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