Hydraulic electric drive power grid circuit of dredger dredging system

Abstract

The utility model relates to a hydraulic electric drive power grid circuit of a dredger dredging system. The hydraulic electric drive power grid circuit comprises a dredging generator, a dredging distribution board, a distribution board assembly, a motor set assembly and a reamer motor set assembly. The dredging power generator is connected with the dredging power distribution board, and the dredging power distribution board is connected with the power distribution board assembly, the motor set assembly and the reamer motor set assembly. The hydraulic electric drive power grid circuit for the dredger dredging system aims to overcome the defects in the prior art, electric frequency conversion driving of a reamer is achieved, effective power of a dredging power generation diesel engine is fully utilized, and efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of dredging system liquid electric drive power grid circuit of dredger. BACKGROUND

[0002] The driving mode of cutter of traditional cutter suction dredger is mostly hydraulic drive. The energy conversion efficiency of cutter hydraulic drive is low, and the overload capacity is poor. Hydraulic pressure is transmitted through hydraulic pipeline, and hydraulic oil leakage is inevitable. Hydraulic impact, pipeline vibration and noise may occur during operation. Especially, the cutter hydraulic drive motor and hydraulic pipeline are in deep water environment for a long time during construction. In addition, the risk of different pipeline connection rupture and leakage is greatly increased, which may cause environmental pollution.

[0003] Therefore, more and more newly built cutter suction dredgers will choose the form of electrically driven cutter. Therefore, the above problems are solved by providing a kind of dredging system liquid electric drive power grid circuit of dredger. UTILITY MODEL

[0004] The utility model aims to overcome the defects of the prior art and provide a kind of dredging system liquid electric drive power grid circuit of dredger, which realizes electric frequency conversion driving of cutter, fully utilizes the effective power of dredging diesel generator, and improves efficiency.

[0005] The technical scheme for achieving the above-mentioned purpose is as follows: a kind of dredging system liquid electric drive power grid circuit of dredger, comprising a dredging generator, a dredging distribution board, a distribution board assembly, a motor set assembly and a cutter motor set assembly.

[0006] The dredging generator is connected to the dredging distribution board. The dredging distribution board is connected to the distribution board assembly, the motor set assembly and the cutter motor set assembly respectively.

[0007] Preferably, the dredging distribution board comprises a first circuit breaker, a second circuit breaker, a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, a seventh circuit breaker, an eighth circuit breaker and a ninth circuit breaker.

[0008] The left end of the first circuit breaker is connected to the dredging generator. The right end of the first circuit breaker is connected in parallel to the left end of the second circuit breaker, the third circuit breaker, the fourth circuit breaker, the fifth circuit breaker, the sixth circuit breaker, the seventh circuit breaker, the eighth circuit breaker and the ninth circuit breaker.

[0009] The right end of the second circuit breaker and the third circuit breaker is connected to the distribution board assembly.

[0010] The right end of the fourth circuit breaker, the fifth circuit breaker, the sixth circuit breaker and the seventh circuit breaker is connected to the motor set assembly.

[0011] The right end of the eighth circuit breaker and the ninth circuit breaker is connected with the cutter motor group assembly.

[0012] Preferably, the power distribution board assembly comprises an original ship power distribution board, the left end of the original ship power distribution board is connected with the right end of the tenth circuit breaker on the power supply screen, the left end of the tenth circuit breaker is connected with the right end of the daily transformer, and the left end of the daily transformer is connected with the right end of the second circuit breaker and the third circuit breaker respectively.

[0013] Preferably, the motor group assembly comprises a first hydraulic power pump driving motor, a second hydraulic power pump driving motor, a third hydraulic power pump driving motor and a fourth hydraulic power pump driving motor.

[0014] The left end of the first hydraulic power pump driving motor is connected with the right end of the fourth circuit breaker through a first star-delta connection.

[0015] The left end of the second hydraulic power pump driving motor is connected with the right end of the fifth circuit breaker through a second star-delta connection.

[0016] The left end of the third hydraulic power pump driving motor is connected with the right end of the sixth circuit breaker through a third star-delta connection.

[0017] The left end of the fourth hydraulic power pump driving motor is connected with the right end of the seventh circuit breaker through a fourth star-delta connection.

[0018] Preferably, the cutter motor group assembly comprises a cutter motor, the left end of the cutter motor is connected with the right end of an underwater cable terminal box, and the left end of the underwater cable terminal box is connected with a cutter phase-shifting transformer.

[0019] The dredging system liquid electric drive power grid circuit of the utility model realizes the cutter electric power frequency drive, the effective power of the dredging diesel engine is fully utilized, the efficiency is improved, the cutter overload capacity is increased, the equipment reliability is improved, the intelligent control is conveniently realized, the fuel consumption is reduced, the electric drive is more friendly to the construction environment than the hydraulic drive, and the development direction of the green environmental protection requirement of the engineering ship is met. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the dredging system liquid electric drive power grid circuit of the utility model.

[0021] In the figure: 1, dredging power distribution board; 2, first star-delta; 3, second star-delta; 4, third star-delta; 5, fourth star-delta. DETAILED DESCRIPTION

[0022] The technical solutions of the utility model will be described clearly and completely in connection with the drawings. In the description of the utility model, it should be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying the importance of the opposite.

[0023] The utility model will be further described in connection with the drawings.

[0024] As Figure 1 shown, a kind of dredger dredging system liquid electric drive power grid circuit, including dredging generator G1, dredging switch board 1, switch board component, motor set component and reamer motor set component;Dredging generator G1 connects dredging switch board 1, and dredging switch board 1 is connected with switch board component, motor set component and reamer motor set component respectively.

[0025] Specifically, dredging switch board 1 includes first circuit breaker QF1, second circuit breaker QF2, third circuit breaker QF3, fourth circuit breaker QF4, fifth circuit breaker QF5, sixth circuit breaker QF6, seventh circuit breaker QF7, eighth circuit breaker QF8 and ninth circuit breaker QF9;

[0026] Specifically, the left end of first circuit breaker QF1 is connected with dredging generator G1, and the right end of first circuit breaker QF1 is connected with the left end of second circuit breaker QF2, third circuit breaker QF3, fourth circuit breaker QF4, fifth circuit breaker QF5, sixth circuit breaker QF6, seventh circuit breaker QF7, eighth circuit breaker QF8 and ninth circuit breaker QF9 in parallel;The right end of second circuit breaker QF2 and third circuit breaker QF3 is connected with switch board component;The right end of fourth circuit breaker QF4, fifth circuit breaker QF5, sixth circuit breaker QF6 and seventh circuit breaker QF7 is connected with motor set component;The right end of eighth circuit breaker QF8 and ninth circuit breaker QF9 is connected with reamer motor set component.

[0027] Specifically, switch board component includes original ship 400V switch board A1, and the left end of original ship 400V switch board A1 is connected with the right end of tenth circuit breaker QF10 on power supply screen, the left end of tenth circuit breaker QF10 is connected with the right end of daily transformer T1, and the left end of daily transformer T1 is connected with the right end of second circuit breaker QF2 and third circuit breaker QF3 respectively.

[0028] Specifically, the motor group assembly includes a first hydraulic power pump driving motor M1, a second hydraulic power pump driving motor M2, a third hydraulic power pump driving motor M3 and a fourth hydraulic power pump driving motor M4; the left end of the first hydraulic power pump driving motor M1 is connected with the right end of the fourth circuit breaker QF4 through the first star-delta 2; the left end of the second hydraulic power pump driving motor M2 is connected with the right end of the fifth circuit breaker QF5 through the second star-delta 3; the left end of the third hydraulic power pump driving motor M3 is connected with the right end of the sixth circuit breaker QF6 through the third star-delta 4; and the left end of the fourth hydraulic power pump driving motor M4 is connected with the right end of the seventh circuit breaker QF7 through the fourth star-delta 5.

[0029] Specifically, the reamer motor group assembly includes a reamer motor M5, the left end of the reamer motor M5 is connected with the right end of the underwater cable terminal box A2, and the left end of the underwater cable terminal box A2 is connected with the reamer phase-shifting transformer T2.

[0030] Specifically, the left end of the first circuit breaker QF1 is connected with the dredging generator G1, the right end of the first circuit breaker QF1 is connected with the left end of the second circuit breaker QF2, the right end of the second circuit breaker QF2 is connected with the left end of the daily-use transformer T1, the left end of the third circuit breaker QF3 is connected with the right end of the first circuit breaker QF1, the right end of the third circuit breaker QF3 is connected with the left end of the daily-use transformer T1, the left end of the fourth circuit breaker QF4 is connected with the right end of the first circuit breaker QF1, the right end of the fourth circuit breaker QF4 is connected with the left end of the first hydraulic power pump driving motor M1 through the first star-delta 2, the left end of the fifth circuit breaker QF5 is connected with the right end of the first circuit breaker QF1, the right end of the fifth circuit breaker QF5 is connected with the left end of the second hydraulic power pump driving motor M2 through the second star-delta 3, the left end of the sixth circuit breaker QF6 is connected with the right end of the first circuit breaker QF1, the right end of the sixth circuit breaker QF6 is connected with the left end of the third hydraulic power pump driving motor M3 through the third star-delta 4, the left end of the seventh circuit breaker QF7 is connected with the right end of the first circuit breaker QF1, and the right end of the seventh circuit breaker QF7 is connected with the left end of the fourth hydraulic power pump driving motor M4 through the fourth star-delta 5.

[0031] Specifically, the left end of the eighth circuit breaker QF8 is connected with the right end of the first circuit breaker QF1, the right end of the eighth circuit breaker QF8 is connected with the left end of the reamer phase-shifting transformer T2, the left end of the ninth circuit breaker QF9 is connected with the right end of the first circuit breaker QF1, and the right end of the ninth circuit breaker QF9 is connected with the left end of the reamer phase-shifting transformer T2.

[0032] Specifically, the left end of the daily transformer T1 is connected with the right end of the second circuit breaker QF2, the right end of the daily transformer T1 is connected with the left end of the power supply screen (the tenth circuit breaker QF10), the right end of the tenth circuit breaker QF10 is connected with the original ship 400V distribution board A1 (which is powered by the main generator), and the left end of the daily transformer T1 is connected with the right end of the third circuit breaker QF3.

[0033] Specifically, the left end of the daily transformer T1 is connected with the right end of the second circuit breaker QF2, the right end of the daily transformer T1 is connected with the left end of the power supply screen (the tenth circuit breaker QF10), the right end of the tenth circuit breaker QF10 is connected with the original ship 400V distribution board A1 (which is powered by the main generator), and the left end of the daily transformer T1 is connected with the right end of the third circuit breaker QF3.

[0034] When the working condition is that the power requirement of the reamer is less than 1000KW, the power of the reamer is limited to 1000KW, a daily transformer T1 is additionally arranged, the voltage is converted by the 690V / 400V transformer to supply power to the 400V distribution board A1, and the semi-automatic short-time parallel operation can be realized by the dredging generator G1 and the auxiliary generator to supply power in parallel. After parallel operation, load transfer is also performed, and when the construction power requirement permits, the main generator can be stopped or the generator can be stopped, the dredging generator G1 supplies power to the whole ship, and the purpose of energy saving is effectively achieved.

[0035] When the working condition is that the power requirement of the reamer is less than 1000KW, the power of the reamer is limited to 1000KW, a daily transformer T1 is additionally arranged, the voltage is converted by the 690V / 400V transformer to supply power to the 400V distribution board A1, and the semi-automatic short-time parallel operation can be realized by the dredging generator G1 and the auxiliary generator to supply power in parallel. After parallel operation, load transfer is also performed, and when the construction power requirement permits, the main generator can be stopped or the generator can be stopped, the dredging generator G1 supplies power to the whole ship, and the purpose of energy saving is effectively achieved.

[0036] The dredging system liquid electric drive power grid circuit of the dredger realizes frequency conversion driving of the cutter, the effective power of the dredging diesel engine is fully utilized, the efficiency is improved, the overload capacity of the cutter is increased, the equipment reliability is improved, the intelligent control is realized, the fuel consumption is reduced, the electric drive is more friendly to the construction environment than the hydraulic drive, and the development direction of the green and environmental protection requirement of the engineering ship is met.

[0037] The above embodiments are only used to illustrate the technical solutions of the utility model, and not limit them; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or part or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A liquid-electric drive grid circuit for a dredging system of a dredger, characterized in that: It includes a dredging generator (G1), a dredging distribution board (1), a distribution board assembly, a motor group assembly and a reamer motor group assembly; The dredging generator (G1) is connected to the dredging distribution board (1), and the dredging distribution board (1) is respectively connected to the distribution board assembly, the motor group assembly and the reamer motor group assembly.

2. The liquid-electric driven grid circuit of the dredging system of a dredger according to claim 1, characterized in that: The dredging distribution board (1) comprises a first circuit breaker (QF1), a second circuit breaker (QF2), a third circuit breaker (QF3), a fourth circuit breaker (QF4), a fifth circuit breaker (QF5), a sixth circuit breaker (QF6), a seventh circuit breaker (QF7), an eighth circuit breaker (QF8) and a ninth circuit breaker (QF9); The left end of the first circuit breaker (QF1) is connected to the dredging generator (G1), and the right end of the first circuit breaker (QF1) is connected in parallel to the left ends of the second circuit breaker (QF2), the third circuit breaker (QF3), the fourth circuit breaker (QF4), the fifth circuit breaker (QF5), the sixth circuit breaker (QF6), the seventh circuit breaker (QF7), the eighth circuit breaker (QF8), and the ninth circuit breaker (QF9); The right ends of the second circuit breaker (QF2) and the third circuit breaker (QF3) are connected to the distribution board assembly; The right ends of the fourth circuit breaker (QF4), the fifth circuit breaker (QF5), the sixth circuit breaker (QF6) and the seventh circuit breaker (QF7) are connected to the motor group assembly; The right ends of the eighth circuit breaker (QF8) and the ninth circuit breaker (QF9) are connected to the reamer motor assembly.

3. The liquid-electric driven grid circuit of the dredging system of a dredger according to claim 2, characterized in that: The distribution board assembly includes an original ship 400V distribution board (A1), the left end of the original ship 400V distribution board (A1) is connected to the right end of the tenth circuit breaker (QF10) on the power supply panel, the left end of the tenth circuit breaker (QF10) is connected to the right end of the daily transformer (T1), and the left end of the daily transformer (T1) is respectively connected to the right ends of the second circuit breaker (QF2) and the third circuit breaker (QF3).

4. The liquid-driven power grid circuit of the dredging system of a dredger according to claim 2, characterized in that: The motor group assembly includes a first hydraulic power pump drive motor (M1), a second hydraulic power pump drive motor (M2), a third hydraulic power pump drive motor (M3) and a fourth hydraulic power pump drive motor (M4); The left end of the first hydraulic power pump drive motor (M1) is connected to the right end of the fourth circuit breaker (QF4) through a first star-delta (2); The left end of the second hydraulic power pump drive motor (M2) is connected to the right end of the fifth circuit breaker (QF5) through a second star-delta (3); The left end of the third hydraulic power pump drive motor (M3) is connected to the right end of the sixth circuit breaker (QF6) through a third star-delta (4); The left end of the fourth hydraulic power pump drive motor (M4) is connected to the right end of the seventh circuit breaker (QF7) through a fourth star-delta (5).

5. The liquid-electric driven grid circuit of the dredging system of a dredger according to claim 1, characterized in that: The reamer motor assembly comprises a reamer motor (M5), the left end of the reamer motor (M5) is connected to the right end of an underwater cable junction box (A2), and the left end of the underwater cable junction box (A2) is connected to a reamer phase-shifting transformer (T2).

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