WO2013037198A1 - Pompe à eau à plongeur et son système de commande hydraulique - Google Patents

Pompe à eau à plongeur et son système de commande hydraulique Download PDF

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Publication number
WO2013037198A1
WO2013037198A1 PCT/CN2012/071111 CN2012071111W WO2013037198A1 WO 2013037198 A1 WO2013037198 A1 WO 2013037198A1 CN 2012071111 W CN2012071111 W CN 2012071111W WO 2013037198 A1 WO2013037198 A1 WO 2013037198A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
oil
water
valve
plunger
Prior art date
Application number
PCT/CN2012/071111
Other languages
English (en)
Chinese (zh)
Inventor
史先信
冯瑜
徐小东
赵阳光
Original Assignee
徐州重型机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 徐州重型机械有限公司 filed Critical 徐州重型机械有限公司
Priority to AU2012308005A priority Critical patent/AU2012308005A1/en
Priority to RU2014113204/06A priority patent/RU2579540C2/ru
Priority to BR112014005904A priority patent/BR112014005904A2/pt
Publication of WO2013037198A1 publication Critical patent/WO2013037198A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1172—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor

Definitions

  • the utility model relates to a plunger water pump and a liquid control system thereof.
  • the application is filed on September 14, 2011, the Chinese Patent Office, the application number is 201110272366.0, and the invention name is "a plunger pump and its liquid control system". Priority is hereby incorporated by reference in its entirety.
  • the invention relates to engineering machinery technology, in particular to a plunger water pump and a liquid control system thereof. Background technique
  • the fire pump used for water supply mainly has two types of centrifugal water pump and plunger water pump; due to its own structure limitation, the two can only send water to a height of about 100 meters, which occurs in a super high-rise building. After the fire, due to insufficient water supply pressure and flow, the water source cannot be effectively transported in time, so that the fire cannot be controlled, which often results in very large loss of life and property.
  • the centrifugal water pump has leakage and backflow problems during the working process.
  • the technical problem solved by the present invention is to provide a plunger water pump to reliably increase the output pressure and flow rate of the water pump to meet the fire fighting requirements of super high-rise buildings.
  • the present invention also provides a hydraulic control system for the plunger water pump.
  • the plunger water pump provided by the invention comprises two plunger groups consisting of a water cylinder and a cylinder, the water cylinder piston of each plunger group is synchronously displaced with the cylinder piston, and is connected with the nozzle of each cylinder cylinder.
  • a water tank is further included, and the two water tanks are built in the water tank.
  • a through hole communicating with the water tank is opened on a side wall of the cylinder bore of the outer end of the rod chamber having the rod chamber.
  • the external water outlet is located at the end of the water outlet pipe that communicates with the two outlet water one-way valves.
  • the hydraulic control system of the plunger water pump provided by the present invention comprises a pressure oil circuit and a return oil circuit, and the control valve is configured to have two working positions: in the first working position, the pressure oil path and the first The rodless cavity of the oil cylinder and the rod cavity of the second oil cylinder are connected, and the oil return oil passage is connected with the rod cavity of the first oil cylinder and the rodless cavity of the second oil cylinder; in the second working position, the pressure oil passage and the first oil cylinder The rod chamber and the rodless chamber of the second cylinder communicate with each other, and the return oil passage communicates with the rodless chamber of the first cylinder and the rod chamber of the second cylinder.
  • the control valve is specifically: a first hydraulic directional valve disposed between the two chambers of the first cylinder and the pressure oil passage and the return oil passage, and two chambers and a pressure oil passage disposed in the second cylinder And a second hydraulic directional valve between the oil returning passage; and, the two cylinders are provided with a receiving oil port communicating with the inner cavity of the cylinder barrel, and the receiving oil port is located between the end of the rodless cavity
  • the distance from the cylinder bore of the first cylinder is connected to the control port of the first pilot directional valve and the second pilot directional valve to drive the first
  • the hydraulic directional valve and the second hydraulic directional valve are respectively located at the first working position and the second working position, and the control oil port of the second cylinder and the control of the first hydraulic directional valve and the second hydraulic directional valve
  • the oil port is connected to drive the first hydraulic directional valve and the second hydraulic directional valve respectively at the second working position and the first working position.
  • the method further comprises two receiving valves respectively disposed between the two oil cylinders and the corresponding hydraulic directional valve, the oil inlet of each of the receiving valves is connected with the corresponding oil port of the corresponding oil rainbow, the pressure balance oil port and the corresponding oil cylinder
  • the oil port of the rod cavity is connected, and the oil outlet is connected with the control oil port of the corresponding hydraulic directional valve.
  • the bottoms of the cylinders of the two cylinders are provided with a buffer bypass that is unidirectionally guided in the retracting direction of the piston, and the oil outlet of the buffer bypass communicates with the inner cavity of the cylinder through the bottom of the cylinder cylinder.
  • the oil inlet of the buffer bypass communicates with the cylinder bore through a side wall of the cylinder at a distance from the bottom of the cylinder that is greater than the length of the cylinder piston.
  • the pressure oil passing through the first hydraulic directional valve and the first oil rainbow is routed to the first pump for oil supply, and the pressure oil connected to the second oil cylinder via the second hydraulic directional valve is routed to the second pump. Oil; and, an overflow valve is provided between the outlet of the two pumps and the return oil passage.
  • the overflow is specifically an electrically controlled relief valve.
  • the plunger water pump provided by the invention comprises two plunger groups consisting of a water cylinder and a cylinder, and the water cylinder piston of each plunger group is synchronously displaced with the cylinder piston, that is, the hydraulically controlled double plunger pump;
  • the nozzles of the cylinder are connected with a water inlet check valve that is single-passed from the outside to the cylinder bore, and the water outlet is unidirectionally wide from the cylinder bore to the external water outlet, and the two cylinders are configured to Alternately expand and contract under the control of the control valve.
  • the invention breaks through the structural principle of the traditional water pump, and adopts two oil cylinders to alternately advance and retreat, thereby driving the two water cylinder pistons to alternately operate, thereby respectively realizing the switching of the two working states:
  • First The water inlet connected to the nozzle of the first cylinder cylinder is unidirectionally wide and non-conducting, and the water outlet is unidirectionally wide-conducting, and the inlet water communicating with the nozzle of the second cylinder cylinder is unidirectionally wide-conducting and the water outlet is one-way wide.
  • the first cylinder cylinder drains and the second cylinder cylinder absorbs water.
  • the inlet water communicating with the nozzle of the first cylinder cylinder is unidirectionally wide-conducting
  • the outlet water is unidirectionally wide and non-conducting
  • the inlet water communicating with the nozzle of the second cylinder cylinder is unidirectionally wide and non-conducting
  • the outlet check valve is turned on; in this state, the first water rainbow tube absorbs water, and the second water rainbow tube drains.
  • the water cylinder piston and the cylinder cylinder of the invention can have an actual and reliable sealing structure, which can effectively prevent internal leakage; therefore, the present invention can effectively improve the output flow on the basis of continuous intermittent water supply by the above-mentioned structural optimization design.
  • water pressure, through production test this program can fully meet the requirements of super high-rise building fire extinguishing water pressure 8.0MPa and output flow rate 40L / S.
  • a through hole communicating with the water tank is opened on the side wall of the cylinder bore of the outer end of the rod chamber of the water cylinder, and on the one hand, the through hole can be used to balance the movement of the piston of the water cylinder
  • the cylinder of the water cylinder has a pressure generated by the volume change in the rod cavity, that is, when the cylinder piston advances in the cylinder barrel, the cylinder piston has a volume on the rod chamber side to generate a vacuum, and the external water enters through the through hole; Conversely, when the cylinder piston retreats within the cylinder, the cylinder piston has a smaller volume on the rod chamber side to generate pressure, and water is forced out from the through hole.
  • water can enter and exit from the through hole, thereby cooling the cylinder piston rod connected to the water rainbow piston, and the piston rod can cool the hydraulic oil, thereby effectively controlling the heat dissipation of the hydraulic system.
  • both cylinders are provided with a receiving oil port communicating with the inner cavity of the cylinder barrel, and the receiving oil port is configured to be rodless at a time when the corresponding oil rainbow is completely extended.
  • the cavity side of the first hydraulic directional valve is connected with the oil receiving port of the first hydraulic cylinder, and the control oil port of the second hydraulic directional valve is connected with the second oil red receiving oil port.
  • the take-off valve is disposed between the corresponding fetching port and the control valve, which can further improve the working reliability of the hydraulic reversing; meanwhile, when the cylinder piston is close to the extended limit position, the pressure-free oil of the rod-free cavity can pass through the fetching valve One-way flow to the rod cavity, thereby avoiding the impact of the protruding terminal, affecting the stability of the system work.
  • the plunger water pump and the liquid control system provided by the invention are suitable for any fire fighting equipment and system.
  • FIG. 1 is a schematic view showing the overall structure of the plunger water pump in a specific embodiment
  • FIG. 2 is a schematic structural view of a cylinder cylinder of the specific embodiment
  • FIG. 3 is a schematic diagram of the plunger pump hydraulic control system in a specific embodiment.
  • the second water outlet check valve 24 the water tank 3, the water outlet pipe 4, the first hydraulic control directional valve 51, the second hydraulic control directional valve 52, the first fetch valve 61, the second fetch valve 62, the first pump 71, The second pump 72, the first relief valve 81, the second relief valve 82, and the through hole 9.
  • the core of the invention is to provide a structurally optimized hydraulically controlled double-plunger water pump, comprising two plunger groups consisting of a water cylinder and a cylinder, the cylinder piston of each plunger group being synchronously displaced with the cylinder piston, and each The water inlets of the cylinders of the water cylinders are respectively provided with a water inlet check valve which is single-passed from the outside to the inner cavity of the cylinder cylinder, and a water outlet check valve which is single-passed from the cylinder inner chamber to the external water outlet; two of the oil cylinders It is configured to alternately expand and contract under the control of the control valve.
  • the invention can reliably improve the output pressure and flow rate of the water pump, thereby meeting the demand for fire extinguishing of super high-rise buildings.
  • the first plunger group 1 is composed of a first water cylinder 11 and a first cylinder 12
  • the second plunger group 2 is composed of a second water cylinder 21 and a second cylinder 22.
  • the projecting ends of the cylinder rods of the two cylinders are connected to the corresponding cylinder pistons to achieve simultaneous displacement of the cylinder piston and the cylinder piston of each plunger group.
  • the water tank and the oil cylinder can be arranged coaxially as shown in the figure, or can be arranged substantially in parallel. Obviously, the structure of the coaxial arrangement is relatively simple, and the energy transmission efficiency is the best, so it is the optimal solution. .
  • a first water inlet check valve 13 is disposed in communication with the nozzle of the first cylinder cylinder 111 to realize a single conduction from the outside to the cylinder chamber; and at the same time, a nozzle is connected to the nozzle of the first cylinder cylinder 111.
  • the first water outlet check valve 14 is unidirectionally guided from the cylinder bore to the external water outlet.
  • a second water inlet check valve 23 is disposed in communication with the nozzle of the second cylinder cylinder 211 to achieve a single conduction from the outside to the cylinder bore; and at the same time, communicate with the nozzle of the second cylinder cylinder 211
  • a second outlet check valve 24 is provided to achieve a single conduction from the cylinder bore to the external outlet.
  • the two cylinder pistons are alternately telescoped under the driving of the two cylinder pistons.
  • the external water outlet is located at the end of the outlet pipe 4 that communicates with the two outlet check valves for communication with the water line.
  • the specific operation process is: controlling the rodless cavity of the first cylinder 12 to enter the oil, and returning the oil to the rod cavity, and at the same time, the second oil rainbow 22 has the rod cavity oil inlet and the rodless cavity oil return; in this state, the first advance The water check valve 13 is non-conducting, the first water outlet is unidirectionally wide 14 and the first water tank 11 is drained, the second water inlet check valve 23 is turned on, and the second water outlet is unidirectionally wide 24 non-conducting, second The water tank 21 absorbs water. Controlling the first cylinder 12 The rodless chamber returns to the oil, and the rod chamber enters the oil.
  • the second cylinder 22 has the rod chamber returning oil and the rodless chamber is fed into the oil; in this state, the first inlet check valve 13 is turned on and the first outlet water is turned on.
  • the one-way valve 14 is non-conducting, the first water tank 11 absorbs water, the second water inlet is unidirectionally wide 23 non-conducting, the second water outlet is unidirectionally wide 24, and the second water tank 21 is drained. Since the actual sealing structure can be effectively prevented between the water cylinder piston and the cylinder cylinder, the internal leakage can be effectively prevented; therefore, the present invention can effectively increase the output flow rate and the water pressure on the basis of continuous intermittent water supply.
  • the water tank 3 can be fixedly connected to the water tank. As shown in the figure, both the first water tank 11 and the second water tank 21 are placed in the water tank 3, and the water cylinder cylinder and the cylinder cylinder are fixedly connected to the water tank 3 through a connecting flange. Obviously, as long as the nozzle is located below the water line of the water tank 3, the basic needs of water absorption can be met.
  • FIG. 2 the figure is a schematic structural view of a cylinder cylinder of the present embodiment.
  • a through hole 9 communicating with the water tank 3 is formed in a side wall of each of the cylinders (111, 211) of the outer end of the rod chamber having the rod chamber. It should be understood that the through holes 9 may be provided in plurality and uniformly distributed circumferentially along the cylinders (111, 211).
  • the through hole 9 can be used to balance the pressure generated by the volume change in the rod cylinder of the cylinder (111, 211) during the movement of the cylinder piston.
  • the cylinder piston advances in the cylinder, the cylinder piston has the rod side
  • the volume is increased, a vacuum is generated, and the external water enters through the through hole 9; conversely, when the cylinder piston retreats in the cylinder, the cylinder piston has a smaller volume on the rod side to generate a pressure, and water is pressed out from the through hole 9. .
  • water can be introduced into and out of the through hole 9, thereby cooling the cylinder piston rod connected to the cylinder piston, which in turn can cool and dissipate the hydraulic oil.
  • the solution also provides a hydraulic control system for the plunger pump, see Fig. 3, which is a schematic diagram of the plunger pump hydraulic control system.
  • the pressure oil circuit P and the return oil circuit T of the hydraulic control system may select a system pressure oil circuit and a return oil circuit, or may independently set a pressure oil required for the corresponding oil pump to supply the plunger water pump.
  • the control valve is configured to have two working positions: in the first working position, the pressure oil passage P and the rodless chamber of the first cylinder 12, the second cylinder 22 have The rod chamber is connected, and the return oil passage T communicates with the rod chamber of the first cylinder 12 and the rodless chamber of the second cylinder 22, thereby controlling the rodless chamber of the first cylinder 12 to enter the oil, and the rod chamber is returned to the oil,
  • the rod chamber of the two cylinders 22 In the second working position, the pressure oil passage P communicates with the rod chamber of the first cylinder 12 and the rodless chamber of the second oil rainbow 22, and the return oil passage T and the first oil rainbow
  • the rodless cavity of the second cylinder 22 and the rod cavity of the second cylinder 22 are connected to control the oil return
  • control valve may be a directional control valve, or may be configured as two directional control valves, that is, specifically: two chambers disposed in the first cylinder 12 and the pressure oil passage p and oil return A first pilot directional valve 51 between the oil passages T, and a second pilot directional valve 52 disposed between the two chambers of the second oil rainbow 22 and the pressure oil passage P and the return oil passage T.
  • two directional control valves with each cylinder can further optimize system control performance.
  • the cylinder of the first cylinder 12 is provided with a receiving oil port communicating with the inner cavity of the cylinder barrel
  • the cylinder of the second cylinder 22 is provided with a receiving port connected to the inner cavity of the cylinder. 221.
  • the distance between the receiving oil port 221 and the end of the rodless cavity is greater than the length of the second cylinder piston 222. That is, when the piston extends to the end of the stroke, the pressure of the corresponding pinch port is the oil pressure that drives the piston to control the switching of the two directional valves between the two working positions. Specifically, as shown in FIG.
  • the receiving oil port 121 of the first oil rainbow 12 communicates with the right control oil port of the first hydraulic directional valve 51 and the left control oil port of the second hydraulic directional valve 52 to drive the first
  • a hydraulic directional valve 51 and a second hydraulic directional valve 52 are respectively located at the first working position and the second working position, and the receiving oil port of the second oil rainbow 22 and the left control oil port of the first hydraulic directional valve 51 are
  • the right control port of the second pilot directional valve 52 is in communication to drive the first pilot directional valve 51 and the second pilot directional valve 52 to be respectively located in the second working position and the first working position.
  • the solution further includes two take-off valves, the first take-off valve 61 is located between the first oil cylinder 12 and the hydraulic control directional control valve, and the second take-off valve 62 is located between the second oil rainbow 22 and the hydraulic control directional control valve.
  • the oil inlet A of each fetching valve is connected with the fetching port of the corresponding oil cylinder
  • the pressure balance port B is connected with the port C of the corresponding oil rainbow
  • the control port of the directional valve is connected.
  • a buffer bypass of a single-way conduction along the retracting direction of the piston can be arranged at the bottom of the cylinders of the two cylinders.
  • the oil outlet E of the buffer bypass communicates with the inner cavity of the cylinder through the bottom of the cylinder, and the distance between the inlet port F of the buffer bypass and the bottom of the cylinder is greater than the length of the cylinder piston.
  • the side wall of the cylinder is in communication with the inner cavity of the cylinder.
  • the oil outlet E of the buffer bypass communicates with the return oil passage T, and the oil inlet port F of the buffer bypass communicates with the pressure oil passage P, so that there is The pressure oil in the rod cavity can flow through the one-way valve on the buffer bypass to the rodless chamber to avoid impact on the retracting end.
  • the pressure oil circuit P can use separate oil pumps to provide pressure oil for the two cylinders to better meet the functional requirements of the plunger pump.
  • the pressure oil that communicates with the first oil rainbow 12 via the first pilot directional valve 51 routes the first pump 71 to supply oil, and the pressure oil route that communicates with the second cylinder 22 via the second pilot directional valve 52 is routed.
  • the second pump 72 supplies oil; and, between the liquid outlets of the two pumps and the return oil passage, an overflow valve (the first relief valve 81 and the second relief valve 82) is disposed to reliably maintain the two
  • the oil supply pressure is at a constant state.
  • the overflow overflow (the first overflow width 81 and the second overflow width 82) is preferably an electronically controlled overflow overflow, as shown in the figure, when the control valve is not energized, the inlet port of the relief valve passes through the The control valve constitutes a drain passage, that is, the pressure oil discharged from the outlet of the pump is directly returned to the fuel tank.
  • the overflow overflow When the control valve is energized, the overflow overflows to a constant pressure overflow and safety protection.
  • the two overflowing pressures are selected in the same way, so that the two cylinders are in the same working environment, ensuring reliable switching between the two.

Abstract

La présente invention concerne une pompe à eau à plongeur comprenant deux groupes de plongeurs (1, 2) comprenant chacun un cylindre d'eau (11, 12) et un cylindre d'huile (12, 22). Un piston de cylindre d'eau et un piston de cylindre d'huile de chaque groupe de plongeurs (1, 2) se déplacent de façon synchronisée et l'orifice d'eau de chaque boîte de cylindre d'eau (111, 211) comprend un clapet de retenue d'admission d'eau (12, 23) permettant l'admission unidirectionnelle depuis l'extérieur vers la cavité interne de la boîte et un clapet de retenue d'évacuation d'eau (14, 24) permettant l'admission unidirectionnelle depuis la cavité interne de la boîte vers une évacuation d'eau extérieure. Deux cylindres d'huile (12, 22) sont conçus pour s'étirer alternativement sous la commande d'une soupape de commande. La configuration et le principe de la pompe à eau à plongeur sont plus innovants que ceux d'une pompe à eau traditionnelle et permettent la commutation entre deux états de fonctionnement grâce au mouvement alternatif de deux pistons de cylindre d'eau qui sont entraînés par l'étirement alternatif de deux cylindres d'huile (12, 22). Par rapport à l'art antérieur, grâce à une fourniture d'eau ininterrompue, ladite pompe à eau à plongeur permet d'améliorer l'écoulement d'évacuation et la pression de l'eau. Sur la base de ce qui précède, l'invention concerne un système de commande hydraulique de ladite pompe à eau à plongeur.
PCT/CN2012/071111 2011-09-14 2012-02-14 Pompe à eau à plongeur et son système de commande hydraulique WO2013037198A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2012308005A AU2012308005A1 (en) 2011-09-14 2012-02-14 Water plunger pump and hydraulic control system thereof
RU2014113204/06A RU2579540C2 (ru) 2011-09-14 2012-02-14 Плунжерный водяной насос и его гидравлическая управляющая система
BR112014005904A BR112014005904A2 (pt) 2011-09-14 2012-02-14 bomba de água de pistão e seu sistema d controle hidráulico

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110272366A CN102330649A (zh) 2011-09-14 2011-09-14 一种柱塞水泵及其液控系统
CN201110272366.0 2011-09-14

Publications (1)

Publication Number Publication Date
WO2013037198A1 true WO2013037198A1 (fr) 2013-03-21

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PCT/CN2012/071111 WO2013037198A1 (fr) 2011-09-14 2012-02-14 Pompe à eau à plongeur et son système de commande hydraulique

Country Status (5)

Country Link
CN (1) CN102330649A (fr)
AU (1) AU2012308005A1 (fr)
BR (1) BR112014005904A2 (fr)
RU (1) RU2579540C2 (fr)
WO (1) WO2013037198A1 (fr)

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CN107049339A (zh) * 2017-03-27 2017-08-18 防城港市中医医院 一种精密尿量计量器
CN110566527A (zh) * 2019-09-26 2019-12-13 长沙远大住宅工业集团股份有限公司 液压驱动系统
CN110566527B (zh) * 2019-09-26 2024-04-16 长沙远大住宅工业集团股份有限公司 液压驱动系统

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CN102330649A (zh) * 2011-09-14 2012-01-25 徐州重型机械有限公司 一种柱塞水泵及其液控系统
CN103191669B (zh) * 2013-03-25 2015-10-21 中国矿业大学 一种乳化液自动配制装置
CN104976165B (zh) * 2015-06-10 2017-01-25 西南交通大学 一种水压变量泵
CN106523315A (zh) * 2016-11-24 2017-03-22 南通爱慕希机械股份有限公司 智能液压柱塞注水泵
CN107387353B (zh) * 2017-08-30 2023-08-04 张家口德中钻探机械有限责任公司 超高压水泵
CN110701032A (zh) * 2019-10-23 2020-01-17 徐州晟源环境科技有限公司 一种恒压恒流量污泥泵送系统
CN114658642B (zh) * 2022-03-21 2024-02-06 浙江美罗机电有限公司 水泵自动控制器

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CN1846068A (zh) * 2003-09-26 2006-10-11 三菱重工业株式会社 用于工业机械的液压控制装置
CN2748667Y (zh) * 2004-11-01 2005-12-28 内蒙古北方重工业集团有限公司 脉冲式单活塞水泵装置
CN101078395A (zh) * 2007-06-21 2007-11-28 吕权 高效液压驱动流体泵
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CN102330649A (zh) * 2011-09-14 2012-01-25 徐州重型机械有限公司 一种柱塞水泵及其液控系统

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CN107049339A (zh) * 2017-03-27 2017-08-18 防城港市中医医院 一种精密尿量计量器
CN107049339B (zh) * 2017-03-27 2023-05-26 防城港市中医医院 一种精密尿量计量器
CN110566527A (zh) * 2019-09-26 2019-12-13 长沙远大住宅工业集团股份有限公司 液压驱动系统
CN110566527B (zh) * 2019-09-26 2024-04-16 长沙远大住宅工业集团股份有限公司 液压驱动系统

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