WO2010115338A1 - Zero-disturbance switching method for pipeline transportation standby pump - Google Patents

Zero-disturbance switching method for pipeline transportation standby pump Download PDF

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Publication number
WO2010115338A1
WO2010115338A1 PCT/CN2010/000093 CN2010000093W WO2010115338A1 WO 2010115338 A1 WO2010115338 A1 WO 2010115338A1 CN 2010000093 W CN2010000093 W CN 2010000093W WO 2010115338 A1 WO2010115338 A1 WO 2010115338A1
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WIPO (PCT)
Prior art keywords
pump
standby
speed
mode
replaced
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PCT/CN2010/000093
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French (fr)
Chinese (zh)
Inventor
安建
普光跃
黄朝兵
潘春雷
Original Assignee
云南大红山管道有限公司
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Application filed by 云南大红山管道有限公司 filed Critical 云南大红山管道有限公司
Publication of WO2010115338A1 publication Critical patent/WO2010115338A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/029—Stopping of pumps, or operating valves, on occurrence of unwanted conditions for pumps operating in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/648—Mounting; Assembling; Disassembling of axial pumps especially adapted for liquid pumps

Definitions

  • the invention belongs to the field of high-pressure long-distance slurry pipeline transportation, and particularly relates to the undisturbed switching of the fault pump and the standby pump of the multi-stage pumping station.
  • the slurry conveying high-pressure long-distance pipeline system mainly consists of a main pump, a feed pump, a stirring tank, a thickening machine, an underflow pump, and high and low pressure valves and high pressure resistant pipes.
  • the main equipment may be faulty during the operation or the planned maintenance shall be carried out.
  • the standby pump is put into use, and it is hoped that it will not stop during the switching process.
  • the present invention provides a bumpless switching method for the pipeline transportation standby pump, wherein the replaced pump is the main mode, including the following steps:
  • step (5) Repair the replaced pump.
  • the additional running pump in the secondary mode is changed to the primary mode to prevent the running pump from shutting down following the replaced pump when the pump is replaced.
  • the invention also discloses a standby pump undisturbed switching method in which the replaced pump is in a secondary or single mode, comprising the following steps:
  • the standby pump can be safely switched when the main pump is inspected, and the pump for maintenance is stopped; the single-stage pump station does not affect the normal operation of other stations when stopping a main pump.
  • FIG. 1 Schematic diagram of the pipeline multi-pump switching of the present invention. detailed description
  • FIG. 1 shows the main equipment of each pump station in the system, including the slurry pump 1 and three main pumps.
  • Each main pump has a valve at the inlet and outlet. The inlet is a knife and the outlet is a ball valve. Usually three mains.
  • One of the pumps is used as a backup pump and the other two are operated.
  • three main pumps are divided into a standby pump 2, a normal operation pump 3, and a fault pump 4. In normal operation, the normal operation pump 3 and the fault pump 4 are operating, and the fault pump 4 has a problem during operation, and it is necessary to stop it, and the standby pump 2 is used, but the entire system is not stopped.
  • one pumping station can be in the independent mode or in the continuous mode with other pumping stations, and for the three pumps of the same pumping station, it can be set as the main and secondary. , a single of these different modes to control.
  • main mode There is a correlation between the main mode and the secondary mode.
  • the pump speed of the main mode changes, the pump of the secondary mode will also change the same speed, and the single mode will not be affected by the primary and secondary modes.
  • the effect of the mode pump it itself does not affect the pumps of the primary and secondary modes.
  • the fault pump is the main mode:
  • the fault pump is a secondary or single mode:
  • the fault pump is the main mode: (1), pre-start the standby pump 2, reduce the pump speed of each pumping station to about 30%, according to the actual pressure pumping speed of each pumping station can be properly adjusted (lower pumping speed of pumping stations at all levels should be carried out under manual control) ;
  • Fault pump 4 is a secondary or single mode:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

A zero-disturbance switching method for a pipeline transportation standby pump is provided. When a pump to be replaced is in a main mode, the method comprises the following steps: (1) pre-starting the standby pump and reducing the speed of the pump in a normal operation to about 30%; (2) opening an inlet valve and an outlet valve of the standby pump and ensuring that a drain valve of same is closed; (3) setting the standby pump to the main mode; (4) starting the standby pump; (5) stopping the pump to be replaced and closing an inlet valve and an outlet valve of same when the speed of the standby pump reaches 30%; (6) increasing the speed of the standby pump to a normal speed; and (7) overhauling the replaced pump. The present method enables the overhaul of a main pump by means of stopping same and safely switching to a standby pump. The normal operations of other stations are not affected when a main pump is stopped in a single-stage pump station.

Description

一种管道运输备用泵无扰动切换方法  Pipeline transportation standby pump undisturbed switching method
技术领域 Technical field
本发明属于高压长距离矿浆管道输送领域， 特别是涉及多级泵站 故障泵与备用泵的无扰动切换。  The invention belongs to the field of high-pressure long-distance slurry pipeline transportation, and particularly relates to the undisturbed switching of the fault pump and the standby pump of the multi-stage pumping station.
背景技术 Background technique
矿浆输送高压长距离管道***主要由主泵、 喂料泵、 搅拌槽、 浓 缩机、 底流泵以及高、 低压阀门和耐高压管道组成。  The slurry conveying high-pressure long-distance pipeline system mainly consists of a main pump, a feed pump, a stirring tank, a thickening machine, an underflow pump, and high and low pressure valves and high pressure resistant pipes.
矿浆输送高压长距离管道在运行过程中， 主要设备奇好泵在运行 过程中可能出现故障或者要进行计划检修， 此时将备用泵投入使用， 希望在切换过程中不停机。  During the operation of the slurry conveying high-pressure long-distance pipeline, the main equipment may be faulty during the operation or the planned maintenance shall be carried out. At this time, the standby pump is put into use, and it is hoped that it will not stop during the switching process.
发明内容 Summary of the invention
为了保证管道的安全运行， 降低管道停机率， 本发明提供一种管 道运输备用泵无扰动切换方法， 其中被更换泵为主要模式， 包括如下 步骤：  In order to ensure the safe operation of the pipeline and reduce the pipeline shutdown rate, the present invention provides a bumpless switching method for the pipeline transportation standby pump, wherein the replaced pump is the main mode, including the following steps:
(1) 、 ^启动备用泵， 将正常运行泵的泵速降到 30%左右；  (1) , ^ start the standby pump, reduce the pump speed of the normal running pump to about 30%;
(2) 、 将备用泵的进出口阀门打开， 保证排污阀为关闭状态； (2) Open the inlet and outlet valves of the standby pump to ensure that the drain valve is closed;
(3) 、 将备用泵的模式设置为主要模式； (3) Set the mode of the standby pump to the main mode;
(4) 、 启动备用泵；  (4) Start the standby pump;
(5) 、 当备用泵的泵速达到 30%时， 停被更换泵， 关闭被更换泵 进出口阀门；  (5) When the pump speed of the backup pump reaches 30%, stop the pump to be replaced, and close the pump inlet and outlet valves;
(6) 、 将备用泵泵速升至正常；  (6), pumping the standby pump to normal;
( 7 ) 、 对被更换泵进行检修。 在所述步骤（5)前， 将处于次要模式的另外的运行泵改为主要模 式， 防止在停被更换泵时该运行泵跟随被更换泵而停机。 (7) Repair the replaced pump. Prior to said step (5), the additional running pump in the secondary mode is changed to the primary mode to prevent the running pump from shutting down following the replaced pump when the pump is replaced.
本发明还公开了被更换泵为次要或者单一模式下的备用泵无扰动 切换方法， 包括如下步骤：  The invention also discloses a standby pump undisturbed switching method in which the replaced pump is in a secondary or single mode, comprising the following steps:
(1) 、 预启动备用泵， 将正常运行泵的泵速降到 30%左右；  (1), pre-start the standby pump, reduce the pump speed of the normal operation pump to about 30%;
(2) 、 将备用泵的进出口阀门打开， 保证排污阀为关闭状态； (2) Open the inlet and outlet valves of the standby pump to ensure that the drain valve is closed;
(3) 、 将备用泵的模式设为次要或者单一模式； (3) Set the mode of the standby pump to a secondary or single mode;
(4) 、 停被更换泵；  (4), stop the pump being replaced;
(5) 、 启动备用泵；  (5) Start the standby pump;
(6) 、 当备用泵的泵速达到 30%, 转速稳定时， 提高正常运行泵 的泵速至正常； ·  (6) When the pump speed of the standby pump reaches 30% and the speed is stable, increase the pump speed of the normal running pump to normal;
(7) 、 对被更换泵进行检修。  (7) Repair the replaced pump.
采用本发明的方法， 在主泵进行检修时可以安全切换备用泵， 停 要进行检修的泵； 单级泵站停某主泵时不影响其他站的正常运行。  By adopting the method of the invention, the standby pump can be safely switched when the main pump is inspected, and the pump for maintenance is stopped; the single-stage pump station does not affect the normal operation of other stations when stopping a main pump.
附图说明 DRAWINGS
图 1: 本发明管道多泵切换示意图。 具体实施方式  Figure 1: Schematic diagram of the pipeline multi-pump switching of the present invention. detailed description
下面结合附图对本发明进行具体描述。  The invention will now be described in detail with reference to the accompanying drawings.
图 1示出了***中各个泵站的主要设备，包括渣浆泵 1和三台主泵， 每台主泵的进出口都有阀门， 其中进口为刀岡， 出口为球阀； 通常三 台主泵中一台作为备用泵， 另两台运行。 本发明中为了描述方便， 将 三台主泵分为备用泵 2、正常运行泵 3和故障泵 4。在正常运行的时候， 正常运行泵 3和故障泵 4在运行， 故障泵 4在运行期间出现了问题， 需要将其停机， 而使用备用泵 2, 但是又不让整个***停下来。 矿浆输送高压长距离管道***中， 一个泵站可以处于独立模式， 也 可以与其它泵站一起处于连打模式， 而对于同一泵站的三台泵而言， 可以将其设置成主要、 次要、 单一这几种不同的模式来控制。 主要模 式和次要模式之间是有关联的， 主要模式的泵发生速度上的变化时， 次要模式的泵也会随之发生同样的速度变化， 而单一模式既不会受主 要与次要模式泵的影响， 它本身也不会影响主要与次要模式的泵。 Figure 1 shows the main equipment of each pump station in the system, including the slurry pump 1 and three main pumps. Each main pump has a valve at the inlet and outlet. The inlet is a knife and the outlet is a ball valve. Usually three mains. One of the pumps is used as a backup pump and the other two are operated. For the convenience of description in the present invention, three main pumps are divided into a standby pump 2, a normal operation pump 3, and a fault pump 4. In normal operation, the normal operation pump 3 and the fault pump 4 are operating, and the fault pump 4 has a problem during operation, and it is necessary to stop it, and the standby pump 2 is used, but the entire system is not stopped. In the slurry conveying high-pressure long-distance pipeline system, one pumping station can be in the independent mode or in the continuous mode with other pumping stations, and for the three pumps of the same pumping station, it can be set as the main and secondary. , a single of these different modes to control. There is a correlation between the main mode and the secondary mode. When the pump speed of the main mode changes, the pump of the secondary mode will also change the same speed, and the single mode will not be affected by the primary and secondary modes. The effect of the mode pump, it itself does not affect the pumps of the primary and secondary modes.
(一） 、 当需进行切换备用泵的泵站与其它站为独立运行模式时： (1) When the pump station that needs to switch the standby pump is in independent operation mode with other stations:
1、 故障泵为主要模式： 1. The fault pump is the main mode:
(1) 、 预启动备用泵 2， 降低正常运行泵 3的泵速到 30%左右； ( 2 )、将备用泵 2的进出口阀门打开， （保证排污阀为关闭状态）； ( 3 ) 、 将备用泵 2的模式设为主要模式；  (1), pre-start the standby pump 2, reduce the pump speed of the normal operation pump 3 to about 30%; (2) open the inlet and outlet valves of the standby pump 2 (to ensure that the drain valve is closed); (3) Set the mode of the standby pump 2 to the main mode;
(4) 、 启动备用泵 2;  (4), start the backup pump 2;
(5) 、 当备用泵的泵速达到 30%左右， 转速稳定时， （如果正常 运行泵 3为次要模式， 需先将其模式改为主要模式， 防止在停故障泵 时该泵跟随故障泵 4而停机），停故障泵 4,关闭故障泵 4进出口阀门； (5) When the pump speed of the standby pump reaches about 30% and the speed is stable (if the normal operation of pump 3 is the secondary mode, the mode must be changed to the main mode first to prevent the pump from following the fault when the pump is stopped. Pump 4 stops), stops the faulty pump 4, closes the faulty pump 4 inlet and outlet valves;
(6) 、 将两台运行泵 2、 3泵速升至正常； (6), the two running pumps 2, 3 pump speed up to normal;
( 7 ) 、 对故障泵 4故障进行检修。  (7) Repair the fault pump 4 fault.
2、 故障泵为次要或者单一模式：  2. The fault pump is a secondary or single mode:
(1) 、 预启动备用泵 2, 降低泵速到 30%左右；  (1), pre-start the standby pump 2, reduce the pump speed to about 30%;
( 2 )、将备用泵 2的进出口阀门打开， (保证排污阀为关闭状态）； (2) Open the inlet and outlet valves of the standby pump 2 (to ensure that the drain valve is closed);
(3) 、 将备用泵 2的模式设为次要或单一模式； (3) Set the mode of the standby pump 2 to a secondary or single mode;
(4) 、 停故障泵 4;  (4), stop the fault pump 4;
(5) 、 启动备用泵 2;  (5), start the backup pump 2;
(6) 、 当备用泵 2的泵速达到 30%左右， 转速稳定时， 提高两台 运行泵 2、 3的泵速至正常； 、  (6) When the pump speed of the backup pump 2 reaches about 30%, when the speed is stable, increase the pump speed of the two running pumps 2 and 3 to normal;
( 7 ) 、 对故障泵 4故障进行检修。  (7) Repair the fault pump 4 fault.
(二） 、 当多极泵站连打时备用泵的切换  (2) Switching of the standby pump when the multi-pole pumping station is connected
1、 故障泵为主要模式： ( 1 ) 、 预启动备用泵 2， 降低各级泵站泵速到 30%左右， 根据实 际压力各级泵站泵速可做适当调整（降低各级泵站泵速应在手动控制 下进行） ； 1. The fault pump is the main mode: (1), pre-start the standby pump 2, reduce the pump speed of each pumping station to about 30%, according to the actual pressure pumping speed of each pumping station can be properly adjusted (lower pumping speed of pumping stations at all levels should be carried out under manual control) ;
( 2 )、将备用泵 2的进出口阀门打开， （保证排污阀为关闭状态）； ( 3 ) 、 将备用泵 2的模式设为主要模式；  (2) Open the inlet and outlet valves of the standby pump 2 (to ensure that the drain valve is closed); (3) Set the mode of the standby pump 2 to the main mode;
( 4 ) 、 启动备用泵 2, 当备用泵 2启动后， 注意各级泵站进出口 压力的变化情况（如进行切换的为上级泵站， 需根据入口压力的变化 升高下级泵站的泵速； 如进行切换的为下级泵站， 在备用泵 2启动后， 应根据进行切换泵站的入口压力升高上级泵站的泵速； 如进行切换泵 站为中间泵站，则需根据入口压力变化对其上、下级泵站的泵速提升）， 直到全线达到一个平衡状态；  (4) Start the backup pump 2. When the standby pump 2 starts, pay attention to the change of the inlet and outlet pressure of each pumping station (if the upper pumping station is switched, the pump of the lower pumping station should be increased according to the change of the inlet pressure) If the switching is performed as the lower pumping station, after the standby pump 2 is started, the pumping speed of the upper pumping station should be increased according to the inlet pressure of the switching pumping station; if the switching pumping station is the intermediate pumping station, the inlet is required according to the inlet. The pressure changes to the pump speed of the upper and lower pumping stations) until the entire line reaches an equilibrium state;
( 5 ) 、 当备用泵 2的泵速达到 30%, 转速稳定时， （如果正常运 行泵 3为次要模式， 需先将其模式改为主要模式， 防止在停故障泵 4 时该泵 3跟随故障泵而停机）， 停故障泵 4， （根据各级泵站实际入口 压力降低各级泵站泵速到全线平衡） ， 关闭故障泵 4进出口阀门；  (5) When the pump speed of the backup pump 2 reaches 30% and the speed is stable (if the normal operation of the pump 3 is the secondary mode, the mode must be changed to the main mode first to prevent the pump 3 from being stopped when the pump 4 is stopped. Stop with the fault pump), stop the fault pump 4, (reduced the pump speed of each pump station to the full line balance according to the actual inlet pressure of each pumping station), and close the inlet and outlet valves of the fault pump 4;
( 6 )将全线泵速提升至正常；  (6) Raise the full line pump speed to normal;
( 7 ) 、 对故障泵 4故障进行检修。  (7) Repair the fault pump 4 fault.
2、 故障泵 4为次要或者单一模式:  2. Fault pump 4 is a secondary or single mode:
( 1 ) 、 预启动备用泵 2, 降低各级泵站泵速到 30%， 根据实际压 力各级泵站泵速可做适当调整（降低泵速各级泵站应在手动控制下进 行） ；  (1), pre-start the standby pump 2, reduce the pump speed of each pumping station to 30%, according to the actual pressure, the pump speed of each pumping station can be properly adjusted (lower pump speed should be carried out under manual control).
( 2 )、将备用泵 2的进出口阀门打开，（保证排污阀为关闭状态）； ( 3 ) 、 将备用泵 2的模式设为次要或单一模式；  (2) Opening the inlet and outlet valves of the standby pump 2 (to ensure that the drain valve is closed); (3) setting the mode of the standby pump 2 to a secondary or single mode;
( 4 ) 、 停故障泵 4， 在停故障泵 4的同时， 才良据故障泵 4实际沖 程数的变化（作为运行泵的奇好泵的启动、 停止都有一个斜坡式过程） 适时启动备用泵 2,这样可以使前后级泵站的进口压力处于一个平稳的 状态， 此过程中注意各个泵站进口压力的变化， 并对泵速做出相应的 调整； (5) 、 备用泵 2启动正常、 故障泵 4停后， 关闭故障泵 4进出口 阀门， 将各站泵速提升至正常； (4), stop the faulty pump 4, while stopping the faulty pump 4, according to the change of the actual number of strokes of the faulty pump 4 (as a start-up and stop of the pump that runs the pump, there is a ramp-type process) Pump 2, so that the inlet pressure of the pump station in the front and rear stages is in a stable state. In this process, pay attention to the change of the inlet pressure of each pump station, and make corresponding adjustments to the pump speed; (5), the standby pump 2 starts normally, after the fault pump 4 stops, the faulty pump 4 inlet and outlet valves are closed, and the pump speed of each station is raised to normal;
(6) 、 对故障泵故障进行检修。  (6), repair the faulty pump fault.

Claims

权 利 要 求 书 Claim
1、 一种管道运输备用泵无扰动切换方法， 其中被更换泵为主要模 式， 其特征在于包括如下步骤： 1. A method for undisturbed switching of a pipeline transportation standby pump, wherein the replaced pump is a main mode, and the method comprises the following steps:
(1) 、 预启动备用泵， 将正常运行泵的泵速降到 30%左右；  (1), pre-start the standby pump, reduce the pump speed of the normal operation pump to about 30%;
(2) 、 将备用泵的进出口阀门打开， 保证排污阀为关闭状态； (2) Open the inlet and outlet valves of the standby pump to ensure that the drain valve is closed;
(3) 、 将备用泵的模式设置为主要模式； (3) Set the mode of the standby pump to the main mode;
(4) 、 启动备用泵；  (4) Start the standby pump;
(5) 、 当备用泵的泵速达到 30%时， 停被更换泵， 关闭被更换泵 进出口阀门；  (5) When the pump speed of the backup pump reaches 30%, stop the pump to be replaced, and close the pump inlet and outlet valves;
(6) 、 将备用泵泵速升至正常；  (6), pumping the standby pump to normal;
( 7 ) 、 对被更换泵进行检修。  (7) Repair the replaced pump.
2、 根据权利要求 1所述的管道运输备用泵无扰动切换方法， 其特 征在于： 在所述步驟（5)前， 将处于次要模式的另外的运行泵改为主 要模式， 防止在停被更换泵时该运行泵跟随被更换泵而停机。 2. The method for undisturbed switching of a pipeline transportation standby pump according to claim 1, wherein: before the step (5), changing another running pump in the secondary mode to a main mode to prevent the stoppage When the pump is replaced, the running pump stops following the replaced pump.
3、 根据权利要求 1或 2所述的管道运输备用泵无扰动切换方法， 其特征在于： 通过手动控制降低泵速。 3. The method for undisturbed switching of a pipeline transportation standby pump according to claim 1 or 2, characterized in that: the pump speed is reduced by manual control.
4、 根据权利要求 1-3任一项所述的管道运输备用泵无扰动切换方 法， 其特征在于， 当泵站处于连打模式时， 在步骤（1) 中， 降低各级 泵站泵速到 30%左右。 The method for undisturbed switching of a pipeline transportation standby pump according to any one of claims 1 to 3, characterized in that, when the pumping station is in the continuous mode, in step (1), the pump speed of each pumping station is lowered. It is about 30%.
5、 根据权利要求 4所述的管道运输备用泵无扰动切换方法， 其特 征在于， 当泵站处于连打模式时， 在步骤（4) 中根据入口压力的变化 升高相应泵站的泵速。 6、 根据权利要求 5所述的管道运输备用泵无扰动切换方法， 其特 征在于， 当进行切换的为上级泵站时， 根据入口压力的变化升高下级 泵站的泵速； 当进行切换的为下级泵站时， 根据进行切换泵站的入口 压力升高上级泵站的泵速； 当进行切换的泵站为中间泵站时， 根据入 口压力变化对其上、 下级泵站的泵速进行提升。 5. The method for undisturbed switching of a pipeline transportation standby pump according to claim 4, wherein when the pumping station is in the continuous mode, the pumping speed of the corresponding pumping station is increased according to the change of the inlet pressure in the step (4). . 6. The method for undisturbed switching of a pipeline transportation standby pump according to claim 5, wherein when the switching is performed to the upper pumping station, the pump speed of the lower pumping station is increased according to the change of the inlet pressure; When it is the lower pumping station, the pumping speed of the upper pumping station is increased according to the inlet pressure of the switching pumping station; when the pumping station that performs the switching is the intermediate pumping station, the pumping speed of the upper and lower pumping stations is changed according to the inlet pressure change. Upgrade.
7、 一种管道运输备用泵无扰动切换方法， 其中被更换泵为次要或 者单一模式， 其特征在于包括如下步骤： 7. A method for undisturbed switching of a pipeline transportation standby pump, wherein the replaced pump is a secondary or single mode, and the method comprises the following steps:
(1) 、 预启动备用泵， 将正常运行泵的泵速降到 30%左右；  (1), pre-start the standby pump, reduce the pump speed of the normal operation pump to about 30%;
(2) 、 将备用泵的进出口阀门打开， 保证排污阀为关闭状态； (2) Open the inlet and outlet valves of the standby pump to ensure that the drain valve is closed;
(3) 、 将备用泵的模式设为次要或者单一模式； (3) Set the mode of the standby pump to a secondary or single mode;
(4) 、 停被更换泵；  (4), stop the pump being replaced;
(5) 、 启动备用泵；  (5) Start the standby pump;
(6) 、 当备用泵的泵速达到 30%, 转速稳定时， 提高正常运行泵 的泵速至正常；  (6) When the pump speed of the standby pump reaches 30% and the speed is stable, increase the pump speed of the normal running pump to normal;
( 7 ) 、 对被更换泵进行检修。  (7) Repair the replaced pump.
8、 根据权利要求 7所述的管道运输备用泵无扰动切换方法， 其特 征在于： 通过手动控制降低泵速。 8. The method of undisturbed switching of a pipeline transportation standby pump according to claim 7, wherein: the pump speed is reduced by manual control.
PCT/CN2010/000093 2009-04-09 2010-01-21 Zero-disturbance switching method for pipeline transportation standby pump WO2010115338A1 (en)

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