WO2013037198A1 - Water plunger pump and hydraulic control system thereof - Google Patents

Water plunger pump and hydraulic control system thereof 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
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Patent type
Prior art keywords
cylinder
oil
water
chamber
valve
Prior art date
Application number
PCT/CN2012/071111
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French (fr)
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
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/06Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109Piston 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
    • F04B9/117Piston 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
    • F04B9/1172Piston 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

Abstract

Disclosed in the present invention is a water plunger pump has two plunger groups (1, 2) each comprised bynsists of a water cylinder (11, 12) and an oil cylinder (12, 22). A water cylinder piston and an oil cylinder piston of each plunger group (1, 2) move synchronously, and the water port of each water cylinder canister (111, 211) is provided with a water inlet check valve (12, 23) for unidirectionally admitting from the outside to the inner cavity of the canister and a water outlet check valve (14, 24) for unidirectionally admitting from the inner cavity of the canister to an outside water outlet. Two oil cylinders (12, 22) are configured to alternatively stretch under the control of a control valve. Said water plunger pump breaks through the configuration and principle of the traditional water pump and enables switching between two working states by alternative movement of two water cylinder pistons which are driven by alternative stretch of two oil cylinders (12, 22). Compared with the prior art, based on supplying water without interruption, said water plunger pump can enhance outlet flow and water pressure. Based on this, a hydraulic control system of said water plunger pump is provided.

Description

A trunk piston pumps and hydraulic control system of the present application claims the September 14, 2011 submitted to the China Patent Office Application No. 201110272366.0, entitled "an plunger pumps and hydraulic control systems," the Chinese patent application priority, the entire contents of which is incorporated by reference in the present application. FIELD

The present invention relates to mechanical engineering technology, particularly to a plunger pump and hydraulic control system. Background technique

With the rising super high-rise commercial and residential whole height of the building, one of the problems of its firefighting water supply system it is difficult. As we all know, the majority of fire water to provide fire water, needs to be pressurized fire pumps to meet the requirements of the water pressure and water for fire fighting. For example, in order to fire an example mobile device that is typically mounted to the fire fighting water pump provides a pressure terminal gun fire, fire water cannons and the like. Clearly, the implementation of good performance of fire pumps to develop, fire fighting methods and tactics have played a decisive role.

In the prior art, for water fire main pump plunger pumps and centrifugal pumps are two types; restricted by its structure, both will usually only water to 100 meters high, occurs in high-rise building after the fire, due to the water pressure and flow is not enough, not timely and effective delivery of water, making it impossible to control the spread of fire, often resulting in very large losses of life and property. Wherein, the centrifugal pump there is a leak and a reflux problems during operation, as the water pressure increases, the leakage flow increased simultaneously and the return, difficult to achieve a high-pressure water pressure Gen fire pump rated pressure of 4.0MPa is not less than the standard, and reduced efficiency; the works plunger pump limits its output flow generally not exceed lOL / s, unable to meet the requirements of high-rise building fire fighting water consumption.

In view of this, urgently look for other ways to optimize the design for the water pump to provide to meet the requirements of high-rise building fire fighting water pressure and output flow. SUMMARY

In response to these shortcomings, the present invention is to solve the technical problem is to provide a plunger pump to increase pump output pressure and reliable flow to meet the needs of high-rise building fire fighting. On this basis, the present invention also provides a hydraulic control system of the pump plunger. The present invention provides a plunger pump, comprising two plungers group consisting of cylinders and tanks, each tank of the plunger piston and the cylinder piston group desynchronization, and are disposed in communication with the outlet of each cylinder of the tank inlet check valve has a single chamber inside the cylinder by conduction to the outside, the cylinder bore outside the outlet chamber to the outlet check valve unidirectional conduction; and the two cylinders arranged alternately under control of the control valve telescopic.

Preferably, further comprising a water tank, the two tanks built in the tank.

Preferably, there is the tank defines a through hole communicating with the tank on the tank outer side wall of the cylinder rod end of the chamber portion.

Preferably, the outlet is located outside the outlet end of two-way communication with the valve outlet pipe.

As described above the present invention provides the hydraulic control system of the pump plunger, including the pressure oil passage and the return oil path, the control valve is configured to have two operating positions: in a first operating position, the pressure in the first oil passage rodless cylinder chamber, a second chamber communicating cylinder rod, the return oil path and the rod chamber of the first cylinder, a second cylinder chamber communicating without lever; second working position, pressure oil in the first cylinder rod chamber, the second chamber communicating rodless cylinder, the first return oil passage with the cylinder rod chamber, the second chamber communicating cylinder rod.

Preferably, the control valve is specifically: a first directional control provided between the first cylinder chamber and two pressure oil passage and the return oil passage valves, two chambers and disposed in the second oil passage and the pressure cylinder and a second directional control valve between the return oil path; and, the two cylinders each with a port and defines the trust cylinder bore chamber communicating with the cavity located between the port end of the rodless trust the cylinder of the piston cylinder side wall a distance greater than the length; and the trust first cylinder port communicates with the first directional control valve and second directional control valve control port, to drive the first a second directional control valve and the directional control valves are located in a first operating position and a second working position, the second cylinder port and the first oil trust directional control valve and second directional control valve control communication port, for driving a first directional control valve and the second directional control valves are located at a first position and a second work operative position.

Preferably, further comprising a trust two valves respectively disposed between the two cylinders and the respective directional control valves, each valve trust oil inlet of the oil corresponding to rainbow trust port communicates with a respective pressure Ping Heng cylinder port there rod chamber communicating port, a control port and an oil outlet of the respective pilot directional valve communicates. Preferably, two of the bottom cylinder is provided with cylinder retracted damper bypass unidirectional conduction direction along the piston, the buffer bypass oil outlet through the bottom of the fuel tank cylinder chamber communicates with the cylinder bore, cylinder side wall of the buffer bypass oil inlet is greater than the length of the cylinder piston at the bottom by the distance between the cylinder barrel and communicates with the cylinder chamber.

Preferably, the pressure oil passage via the first directional control valve in communication with the first oil rainbow by a first oil pump, via said second directional control valve of the second cylinder by a second oil passage communicating the pressure supply pump oil; and, between the two pump outlet port and the return oil passage is provided with a relief valve.

Preferably, the overflow width is specifically electrically controlled spill valve.

The present invention provides a plunger pump comprises a plunger composed of two groups of cylinders and tanks, each tank of the plunger piston and the cylinder piston group desynchronization, i.e. dual pilot piston pump; cylinder due to each tank nozzle tube are provided with a communication with the cylinder bore from the outside to the inlet chamber through the unidirectional check valve, a cylinder bore to the exterior of the chamber through the effluent outlet unidirectional way wide, and the two cylinders arranged telescopic alternately under control of the control valve. Compared with the prior art, the present invention breaks through the structural principles of a conventional pump using two cylinders alternately forward and backward, so as to drive alternately two water piston operation, and thus switch two operating states are achieved: first, and a first one-way water inlet tank communicating cylinder wide non-conductive, water unidirectional conducting wide, one-way inlet and outlet of the second tank in communication wide cylinder oN, the non-water-way wide conducting, in this state, the first cylinder drainage tank, a second water absorption tank cylinder. Second, one-way communication with the water outlet of the first tank cylinder turned wide, non-conductive water-way wide, one-way inlet and outlet of the second tank cylinder communicating broad non-conductive, outlet check valve is turned on; this state, the first water-absorbent Hong Hong cylinder, a second cylinder Hong Hong water drainage. The actual tank of the present invention can be a reliable sealing structure between the piston and the cylinder tank, the leakage can be effectively prevented; therefore, the above-described configuration design optimization, the present invention is a continuous basis without the intermittent water, can effectively improve the output flow and water pressure, the production test, the present embodiment can satisfy the requirements of high-rise building fire extinguishing water pressure of 8.0MPa and output flow 40L / S's.

In a preferred embodiment of the present invention, there is provided with a through-hole communicating with the tank on the tank outer side wall of the cylinder tube end portion of the rod chamber of the tank, on the one hand, the through hole can be used to Ping Heng tank during movement of the piston tank pressure cylinder rod chamber volume change generated, i.e., when the piston moves forward inside the cylinder tank, the water piston rod side chamber volume is increased to generate a vacuum, an external water enters through the through-hole; Conversely, when the piston is retracted inside the cylinder tank, the water piston rod chamber side a pressure smaller volume, the water pushed out from the through-hole. Furthermore, water may enter through the through hole, out, thereby cooling the cylinder piston rod connected to the piston rainbow water, and the piston rod of the hydraulic oil can be cooled, thereby effectively controlling the heat of the hydraulic system.

In a preferred embodiment the present invention provides a plunger pump hydraulic control system, the two cylinders are defined in the cylinder bore trust oil chamber communicating port, which port is configured to trust the oil located in the corresponding time rainbow fully extended rodless side chamber; a first directional control valve and the control port of the first cylinder port communicates trust, a second directional control valve is in communication with the control port of the second oil red trust port. That control terminal, when the piston is extended to the stroke end, the respective drive piston projecting fluid pressure feedback to the other direction of the valve cylinder, which in turn drives the spool to shift, and vice versa; so that by fluid automatic control of two power cylinders alternately projecting, retracted, having a reliable operation characteristics. A valve disposed preferably employ trust the trust between the respective ports of the control valve can be further improved hydraulic commutating reliability; at the same time pressure fluid, when the piston approaches the cylinder extended extreme position, the rod chamber of the valve may be trust unidirectional flow to the piston rod side chamber, thereby avoiding an impact projecting terminal, affect the stability of system operation.

The plunger pumps and hydraulic control system of the present invention is applicable to any provides fire-fighting equipment and systems.

BRIEF DESCRIPTION

FIG 1 is an overall schematic view of a configuration of the plunger pump embodiment;

FIG 2 is a schematic structural view of a specific embodiment of the tank cylinder;

FIG 3 is a specific embodiment of the plunger pump hydraulic control system schematic.

Figure:

A first plunger group, 7J first cylinder 11, a first 7J of cylinder 111, a first cylinder 12, the trust port 121, the first oil rainbow piston 122, first inlet check valve 13, the first outlet one-way valve 14, a second set of plunger 2, a second water tank 21, second tank cylinder 211, a second cylinder 22, the trust port 221, the second oil rainbow piston 222, second inlet check valve 23, the second outlet check valve 24, the water tank 3, outlet pipe 4, a first directional control valve 51, a second directional control valve 52, a first valve 61 trust, trust a second valve 62, a first pump 71, a second pump 72, first relief valve 81, a second relief valve 82, through holes 9. detailed description

The core of the present invention is to provide a double structure optimized pilot pump plunger comprising a plunger composed of two groups of cylinders and tanks, each tank of the plunger piston and the cylinder piston group desynchronization, and each tank outlet cylinder are provided with a communication with the cylinder bore from the outside to the inlet chamber through the unidirectional check valve, a cylinder bore to the outside of the chamber outlet check valve outlet through which unidirectional; the two cylinders telescopically arranged alternately under control of the control valve. Compared with the prior art, the present invention can reliably improve the pump output pressure and flow to meet the needs of high-rise building fire fighting.

Without loss of generality, the following description in conjunction with the accompanying drawings DETAILED DESCRIPTION OF embodiment of the present embodiment.

Referring to FIG. 1, which shows an overall schematic structural diagram of embodiment according to the present embodiment of the plunger pump. 1 by the first group of the first plunger 11 and the first water tank 12 composed of cylinder, the second plunger by a second set of two tanks 21 and 22 composed of a second cylinder. As shown, both the projecting end of each cylinder rod connected to the respective water piston, to achieve a set of tanks each plunger piston and the cylinder piston desynchronization. In terms of overall arrangement, the cylinder coaxially disposed with the tank can be as shown in FIG., May be substantially disposed in parallel, obviously, the structure arranged coaxially to achieve more single-cylinder, and the best energy efficiency of power transmission, it is the optimal solution .

A first water tank and nozzle cylinder 111 is provided in communication with a first inlet check valve 13, in order to achieve from outside to inside the cylinder chamber through the unidirectional; simultaneously, with the first tank outlet cylinder 111 is provided with communication the first outlet check valve 14, to enable the chamber to the exterior of the cylinder bore outlet unidirectional conduction. Likewise, the second tank and the outlet cylinder 211 is provided in communication with a second one-way inlet valve 23, to achieve a single chamber inside the cylinder from outside to conduction; Meanwhile, a second outlet in communication with the cylinder 211 of the water tank It is provided with a second outlet check valve 24, to enable the chamber to the exterior of the cylinder bore outlet unidirectional conduction. Since the two cylinders are alternately arranged telescopically under control of the control valve, so that the two water pistons are driven by synchronous alternating expansion and contraction of the two cylinder piston. In particular, the outer end of the outlet tube outlet is located in the check valve in communication with two outlet 4 for communication with the water line.

The specific operation is: control the first cylinder rod chamber 12 into the oil, the oil return rod chamber, while the second oil chamber 22 has a rainbow into the oil, the oil return rodless chamber; this state, the first intake water non-conduction check valve 13, a first outlet unidirectional conduction width 14, a first drainage tank 11, a second inlet check valve 23 is turned on, a second unidirectional outlet width of 24 non-conductive, the second 21 tank water absorption. Controlling the first oil return cylinder rodless chamber 12, the rod chamber into the oil, while the second cylinder rod back to the oil chamber 22, rodless chamber into the oil; this state, the first check valve 13 inlet guide through the, first outlet check valve 14 non-conductive, water-absorbing first tank 11, second one-way inlet width 23 non-conductive, the second outlet unidirectional conduction width 24, a second drainage tank 21. Since the structure can actually reliable seal between the tank and the tank of the piston cylinder, can effectively prevent internal leakage; Accordingly, the present invention is a continuous basis without the intermittent water, can effectively improve the output flow and water pressure.

Further, the water tank 3 may be fixedly connected integrally with the tank. As shown in the drawing, a first tank 11 and second tank 21 are placed in the water tank 3, water tank between the fuel tank cylinder with the cylinder wall 3 are fixedly connected via a connecting flange to the tank. Obviously, below the water line as long as its outlet located in the tank 3 to meet the basic needs of water absorption.

Further shown in conjunction with FIG. 2, which is a schematic view of the embodiment according to the present embodiment of the tank cylinder. Each tank has a tank chamber outer cylinder rod (111, 211) defines an end portion 9 has a through-hole communicating with the water tank 3 on the side wall. It will be appreciated, the through hole 9 may be provided as a plurality of uniformly distributed in the water tank and the cylinder (111, 211) in the circumferential direction.

9 may be used to Ping Heng water tank during movement of the piston cylinder tanks (111, 211) in the rod chamber of the volume change of the pressure generated by the through hole, when advancing the piston within the cylinder tank, the water piston rod side chamber vacuum producing capacity is increased, the external water enters through the through hole 9; on the contrary, when the piston is retracted inside the cylinder tank, the water piston rod chamber side a pressure smaller volume, the water from the extrudate through hole 9 . Furthermore, water may enter from the through-hole 9, the thus cooled cylinder piston rod connected to the piston and the tank, the piston rod and capable of cooling the hydraulic oil is cooled.

In addition to the plunger pump, the present embodiment also provides a hydraulic control system of the pump plunger, see Figure 3, this figure is a schematic view of the plunger pump hydraulic control system.

The pilot pressure oil system return oil path P and T may be chosen system pressure passage, the return oil path may be provided independently of the corresponding pump plunger pump to provide the required oil pressure. 12 based on the functional needs of the first cylinder and the second cylinder 22, the control valve is configured to have two operating positions: in a first operating position, the pressure P and the first oil passage 12 of the rodless cylinder chamber, a second cylinder 22 is rod chamber communicating with the first return oil path T cylinder rod chamber 12, a second cylinder chamber communicating rodless 22, thereby controlling the first cylinder rodless chamber 12 into the oil, oil return rod with a cavity, a first two cylinder rod chamber 22 into the oil, the oil return lever free chamber; a second working position, the pressure oil path P and the first cylinder rod chamber 12, the second oil chamber no rainbow communication lever 22, the return oil Hong T and the first oil passage rodless chamber 12 and a second cylinder rod chamber 22 is in communication, thereby controlling the rodless cylinder 12 back to the first oil chamber, the rod chamber into the oil, the rod 22 of the second cylinder chamber oil return into the oil rodless chamber.

Incidentally, the specific configuration of the control valve may be a direction control valve, may be arranged as a two directional control valves, i.e., in particular: two chambers provided with a first cylinder pressure oil passage p and an oil return 12 a first directional control valve 51 between a passage T, and the valve 52 is disposed in a second direction between the second pilot oil chamber rainbow two pressure oil passage 22 and the return oil path P and T. Clearly, the control valve disposed in two directions with each respective cylinder is provided, the control system may further help to optimize performance.

Further, the first cylinder port has opened trust chamber communicating with the cylinder bore of the cylinder barrel 12

121, the distance W between the port 121 and the trust chamber greater than the first end portion of the rodless cylinder piston length L 122; likewise, defines trust port communicating with a chamber of the cylinder bore on the cylinder of the second cylinder 22 221, the trust between the distance 221 and the end portion of the chamber ports is greater than the length of the rodless cylinder of the second piston 222. That is, when the piston is extended to the stroke end, the corresponding port trust pressure of the pressure fluid driving the piston extends to the control valve is switched in both directions between the two working positions. Specifically, as shown in FIG. 3, the first oil port 12 rainbow trust 121 of the first directional control valve and the control port 51 on the right side and the left side of the second directional control valve control port 52 communicates to the first drive a directional control valve 51 and second directional control valves 52 are located in a first operating position and a second operating position, the second oil port 22 and rainbow trust with the first directional control valve 51 of the left control port and a second directional control valve 52 of the right control port communicated to drive a first directional control valve 51 and second directional control valves 52 are located at a first position and a second work operative position.

The program also includes a trust two valves, a first valve 61 located between the first trust with the pilot cylinder 12 between the directional control valve, the second valve 62 is in the second oil trust Rainbow 22 between the directional control valve pilot. As shown, the inlet port A of each cylinder corresponding to the trust the trust valve port in communication with the rod chamber pressure balance port B corresponding to the port C oil rainbow communicates with the oil outlet D corresponding pilot port directional control valve communicates. Thus set, can be further improved hydraulic commutating reliability; at the same time, when the piston approaches the cylinder extended extreme position, the trust balance pressure valve port B communicates with the return oil path T, the oil inlet valve trust and A communication system pressure P oil, therefore, the oil pressure in the rod chamber of trust may be one-way flow valve to the piston rod side chamber, thereby avoiding an impact projecting terminal, affect the stability of system operation.

Similarly, the fuel tank in order to avoid unnecessary rigid impact in the retracted extreme position. The program may be provided with a bypass buffer to recover the unidirectional conduction direction along the bottom of the piston cylinder two cylinders. Specifically, as shown, a buffer bypass port E through the bottom of the fuel tank cylinder chamber communicates with the cylinder bore, the bypass oil inlet buffer F the distance between the bottom of the cylinder is greater than the length of the cylinder piston a cylindrical sidewall cylinder chamber communicates with the cylinder bore. Similarly, when the cylinder piston approaches the limit retracted position, the buffer bypass port E in communication with the return oil path T, the buffer bypass F oil inlet P communicates with the oil pressure, and therefore, at this time there the oil pressure of the rod chamber through the check valve may flow to bypass to the buffer rod chamber, retrieving tip to avoid an impact.

As mentioned previously, pressure oil passage P can be used independently of a pressure fluid pump are provided for the two cylinders, in order to better accommodate the needs of the plunger pump function. The valve shown in FIG direction via a first pilot pressure oil passage communicated with the first oil-Hong 1251 by the first oil pump 71, via the second directional control valve 52 communicates with the second cylinder 22 by the pressure of the oil passage two oil pump 72; and, between the outlet port and the return oil passage is provided with two pump relief valve (first pressure relief valve 81 and a second relief valve 82), in order to reliably hold the two oil pressure in a constant state.

Overflow width (first width 81 and the second overflow overflow width 82) is preferably electronically controlled overflow width, as illustrated, the control valve when it is not energized, the inlet port through the relief valve control valves drain passage, i.e. pressure fluid from the outlet port of the pump output directly to the tank at reflux, the control valve when it is energized, the overflow width protect the constant pressure relief and safety. The actual design, the two overflow wide choice consistent set pressure, such that two cylinders work in the same environment, to ensure a reliable switching operation between the two.

The above are only preferred embodiments of the present invention, not to limit the scope of the present invention. Any Any modifications within the spirit and principle of the present invention, equivalent substitutions and improvements should be included within the protection scope claimed in the claims of the present invention.

Claims

Rights request
A pump plunger, wherein the plunger comprises two groups consisting of cylinders and tanks, each tank of the plunger piston and the cylinder piston group desynchronization, and each cylinder barrel tank are in communication with a nozzle is provided from outside to inside the cylinder chamber through the unidirectional check valve inlet, the cylinder bore outside the outlet chamber to the outlet check valve of unidirectional conduction; two cylinders arranged in the control valve telescopic alternately under control.
2, according to the plunger pump according to claim 1, characterized in that, further comprising a water tank, the two tanks built in the tank.
3, the pump plunger according to claim 2, wherein said cylinder has a through hole defined in said water tank in communication with the tank wall outside the cylinder tube end portion of the rod chamber.
4, plunger pump according to claim 2 or claim 3, wherein said external outlet located at the ends of the two outlet check valves in communication with the outlet pipe.
In the: a plunger pump 4 in the hydraulic control system of any one of which comprising a pressure oil passage and the return oil path, the control valve is configured to have two operating positions - 5 and as claimed in claim 1 a working position, pressure oil in the first cylinder rod chamber, the second chamber communicating cylinder rod, the return oil path and the rod chamber of the first cylinder, a second cylinder chamber communicating without lever; in the second the working position, the oil pressure of the first oil passage rainbow rod chamber, the second oil chamber communicating rainbow rodless rodless chamber return oil passage with the first cylinder, a second cylinder rod chamber in communication.
6, according to the plunger pump of the hydraulic control system as claimed in claim 5, wherein the control valve specifically is: disposed between the first cylinder chamber and two pressure oil passage and the return oil passage of the first liquid a direction control valve, and disposed in a second direction between the second pilot oil pressure chamber and two rainbow passage and the return oil path valve; and,
The two cylinders are defined in the cylinder bore trust port communicating with the chamber, the trust on the distance between the sidewall of the cylinder barrel ports located at the chamber end of the rodless cylinder is greater than the length of the piston; and the control port of the first oil rainbow trust oil port and the first directional control valve and second directional control valves in communication, to drive the first directional control valve and the second directional control valves are located in the first work position and a second working position, the second oil port rainbow trust with the first directional control valve and a second control port directional control valve communicating, to drive the first and second pilot directional valve directional control valves are in the second operating position and a first operating position.
7, according to the plunger pump hydraulic control system as claimed in claim 6, characterized in that the valve further comprises two trust between the two cylinders are provided with a respective directional control valves, each valve inlet port trust communication with a corresponding port trust rainbow oil, the oil pressure balance of oil port and a respective rod rainbow oil chamber communicating port, a control port and an oil outlet of the respective pilot directional valve communicates.
8, according to the plunger pump hydraulic control system as claimed in claim 7, characterized in that the two cylinder bottom cylinder is provided with a bypass buffer to recover along the direction of unidirectional conduction piston, the next buffer the oil outlet passage communicates with the bottom of the cylinder by the cylinder inside the cylinder chamber, the buffer bypass oil inlet cylinder piston is greater than the length of the distance between the bottom of the cylinder with the cylinder barrel and the cylinder side walls communication chamber.
9, according to the plunger pump hydraulic control system as claimed in claim 8, characterized in that the pressure oil passage via the first directional control valve in communication with the first cylinder by the first pump oil through the second fluid a direction control valve pressure oil passage communicates with the second cylinder by the second pump oil; and, between the two pump outlet port and the return oil passage is provided with a relief valve.
10, according to the plunger pump hydraulic control system as claimed in claim 9, characterized in that the relief valve is electrically controlled spill valve specifically.
PCT/CN2012/071111 2011-09-14 2012-02-14 Water plunger pump and hydraulic control system thereof WO2013037198A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN 201110272366 CN102330649A (en) 2011-09-14 2011-09-14 Plunger water pump and liquid control system thereof
CN201110272366.0 2011-09-14

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RU2014113204A RU2579540C2 (en) 2011-09-14 2012-02-14 Water plunger pump and its fluid control system

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CN102330649A (en) * 2011-09-14 2012-01-25 徐州重型机械有限公司 Plunger water pump and liquid control system thereof
CN103191669B (en) * 2013-03-25 2015-10-21 中国矿业大学 Automatic means an emulsion formulation
CN104976165B (en) * 2015-06-10 2017-01-25 西南交通大学 One kind of hydraulic variable displacement pump

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CN201661532U (en) * 2010-04-02 2010-12-01 北京华强京工机械制造有限公司 Hydraulic pumping system of concrete pump
CN102330649A (en) * 2011-09-14 2012-01-25 徐州重型机械有限公司 Plunger water pump and liquid control system thereof

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RU2579540C2 (en) 2016-04-10 grant
CN102330649A (en) 2012-01-25 application
RU2014113204A (en) 2015-10-20 application

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