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WO2009124470A1 - 冲洗机构 - Google Patents

冲洗机构 Download PDF

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Publication number
WO2009124470A1
WO2009124470A1 PCT/CN2009/070363 CN2009070363W WO2009124470A1 WO 2009124470 A1 WO2009124470 A1 WO 2009124470A1 CN 2009070363 W CN2009070363 W CN 2009070363W WO 2009124470 A1 WO2009124470 A1 WO 2009124470A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
flushing mechanism
water
pressure relief
spring
Prior art date
Application number
PCT/CN2009/070363
Other languages
English (en)
French (fr)
Inventor
李飞宇
李才有
Original Assignee
Li Feiyu
Li Caiyou
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 Li Feiyu, Li Caiyou filed Critical Li Feiyu
Priority to ES09731084T priority Critical patent/ES2381072T3/es
Priority to EP20090731084 priority patent/EP2251496B1/en
Priority to AT09731084T priority patent/ATE541995T1/de
Publication of WO2009124470A1 publication Critical patent/WO2009124470A1/zh
Priority to US12/786,892 priority patent/US8332970B2/en
Priority to US13/599,207 priority patent/US8689368B2/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D3/00—Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
    • E03D3/10—Flushing devices with pressure-operated reservoir, e.g. air chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]

Definitions

  • the present invention relates to a flushing mechanism for flushing dirt and/or sewage, and more particularly to a flushing mechanism suitable for flushing a sanitary fixture such as a toilet bowl, the flushing mechanism utilizing the spring force of the spring loaded and The pressure of the water causes the required water pressure to be low, the water consumption per washing cycle is small, the structure is simple, the noise is low, the installation is convenient, and it is suitable for being built in or installed outside the toilet.
  • Background technique
  • Toilet flushing equipment is widely used in homes, hotels or various human activities. Because of its universal use, it is especially important to save water in its washing mechanism.
  • the Ministry of Construction has requested that the water consumption per flush cycle of the toilet should be less than 6 litres, which is a challenge for researchers working in the sanitary field.
  • the technical solution of using spring loaded energy storage has many advantages over the technical solution of improving the flushing effect of the toilet flushing device by means of compressed air storage energy.
  • the energy storage component is a spring instead of air
  • a pre-compression force can be applied to the spring, and the energy efficiency ratio of the spring energy storage is much higher than the air compression energy storage, so the spring energy storage can be avoided.
  • the inevitable existence of compressed air energy storage process is as follows: (1) The pressure at the beginning of drainage is high, the water flow is fast, the impact force on the toilet wall is large and the noise is large. When the water supply needs to be stabilized in the later stage of drainage, the water pressure drops rapidly, and the impulse is insufficient.
  • the water supply pressure must be further increased.
  • the casing is subjected to repeated fatigue-recovery, causing material fatigue, aging, or cracking or damage due to accidental collision, the air and debris will diverge along the periphery during the blasting, and the direction is uncontrollable. Therefore, there are defects such as security risks. Therefore, there is a growing tendency to develop flushing devices that utilize spring energy storage.
  • Comparative Document 1 discloses a low water consumption flushing mechanism comprising a plastic housing, a water reservoir and a hydraulic starting system, a piston in the reservoir, and a piston through a mechanical compression piston The spring is biased in the reservoir.
  • the piston is subjected to the pressure of the water (equal to the water pressure of the pipeline) to move upward against the downward force of the spring.
  • the piston stops moving, the upward water pressure acting on the piston is equal to the pressure of the loading spring.
  • a flush valve body is fixed to the bottom of the water reservoir, and the flush valve body has a central opening.
  • the flush valve stem extends along a central portion of the water reservoir, the first end of the valve stem is connected to the flush valve, and the second end of the valve stem is connected to the flush valve plate.
  • a flush valve spring is fixed on the flush valve plate, and the flush valve plate is biased to the standby position by the action of the flush valve spring.
  • the rinsing mechanism is further provided with a scroll diaphragm for preventing water in the reservoir from flowing out of the first piston and preventing water from coming into contact with the first piston spring.
  • plastic housings are used in this document. Plastics are aged or installed, inadvertently impacted during use, dropped, etc., which may cause the housing to rupture and release the energy of the spring. This instantaneous energy release is very powerful, to the surrounding facilities. It will cause harm and even endanger the lives of the surrounding people.
  • the use of a rolling diaphragm seal is effective, but the diaphragm is compressed and subjected to repeated folding, which is easily damaged and directly affects the service life of the flushing mechanism.
  • the hydraulic starting system has a complicated structure and is inconvenient to maintain.
  • Comparative Document 2 discloses a device for discharging a liquid amount comprising a housing with an inlet and an outlet, a spring loaded piston, an inlet valve and an outlet valve.
  • the outlet valve is in the form of a spring loaded double-headed sealing piston that includes a sealing surface at one end thereof for closing the outlet and an opposite actuation surface at the other end.
  • the actuation surface is positioned to be actuated by a pressure-bearing water defined within an actuation chamber within the housing.
  • the inlet valve is in the form of an electromagnetic switch.
  • An electromagnetic switch is used in the device, and therefore, a power source is required at the place where such a device is installed, and the structure is complicated.
  • the material of the casing is not disclosed in the reference document 2, if the metal casing is used, the cost and weight of the device will be increased. If the plastic casing is used, as in the case of the document 2 and the comparative document 1, the casing may be aged or Inadvertent collision, falling, etc. during installation and use cause damage to the surrounding facilities and even endanger the safety of the surrounding people.
  • a flushing mechanism for achieving the object includes: a casing having an upper portion open, and a lower center having an opening, the inside of the casing defining a storage water and a chamber for accommodating the components, and the lower end of the casing is provided with a plurality of
  • the pipe is configured to respectively form a water flow passage with the chamber defined by the box; the upper cover of the box body is combined with the box body; the sleeve has a center line that intersects with the center line of the box body and penetrates into the chamber; a piston comprising a first piston bottom having a central bore and a first piston cylindrical portion extending upward from a periphery of the central bore of the first piston bottom, the side of the bottom of the first piston being radially provided with a groove, the first piston The cylindrical portion is hollow, the sleeve passes through the central hole of the first piston cylindrical portion and the first piston bottom portion; the first piston sealing assembly is located in the groove on the bottom side of the first piston, so that the first piston
  • the pressure relief and/or ballistic resistant portion is a spring limiting unit.
  • the spring limiting unit may include a top cover, at least one screw, a first piston loading spring, and a water outlet flange, the screw penetrating the chamber of the box in parallel or coincident with the center line of the box in the longitudinal direction One end of the screw is fixed to the inner side of the top cover, and the other end is fixed to the water outlet flange.
  • the spring limiting unit may also include a screw disposed in the sleeve coincident with the centerline of the housing.
  • a screw disposed in the sleeve coincident with the centerline of the housing.
  • the pressure relief and/or ballistic resistant portion is at least one pressure relief port disposed slightly above the top periphery of the casing above the top dead center of the first piston.
  • the pressure relief and/or ballistic portion can also be a bulletproof-pressure relief valve.
  • the pressure relief and/or ballistic portion may also be any combination of a spring limiting unit and/or the at least one relief port and/or a bulletproof-pressure relief valve.
  • the flushing mechanism further includes a guide for mounting the flushing mechanism, the guide guiding the first piston and the ballistic.
  • the seal assembly of the first piston and the seal assembly of the second piston may be comprised of inner and outer seals, the inner seal may comprise an elastic member bent from a sheet of metal, and the outer seal may comprise an o-ring.
  • the structures of the first piston seal assembly and the second piston seal assembly may be the same or different.
  • the flushing mechanism further includes a water level travel switch that controls the communication and closing of the water inlet passage and the water supply passage by being pushed a certain distance by the first piston.
  • the flushing mechanism further includes a voltage stabilizing portion.
  • the casing of the present invention may be cylindrical, elliptical cylindrical, or other shape.
  • the flushing mechanism structure of the present invention can save water for each flushing cycle and achieve a good flushing effect. Tests have shown that with the flushing mechanism of the present invention, the water consumption of the flushing cycle can be reduced to 4 L/time while satisfying the required flushing effect.
  • the present invention is provided with a pressure relief and/or bulletproof portion such as a spring limiting unit and a pressure relief port, when the water level travel switch fails, the first piston continues to move upward to the pressure relief port, and water can flow out from the pressure relief port.
  • the protection box will not be damaged by the water supply pressure; when the washing mechanism is disassembled, the screw will not be disengaged until the spring energy is completely released, so accidents can be avoided.
  • the present invention simply utilizes the second piston seal assembly to seal the lower end chamber and the lower inner chamber to form the outer lower chamber and the inner lower chamber, and then the second piston is moved upward by the elastic force of the second piston loading spring, thereby simplifying the structure.
  • Compact, small size and easy to install it can be adapted to all kinds of toilets. It can also be flexibly mounted on the outside of the toilet, or built into the toilet, even inside the wall, thus giving the bathroom design a bigger design. The flexibility and ability to meet a variety of renovation needs.
  • Figure 1 is a perspective view showing the internal component configuration of the flushing mechanism of the present invention
  • Figure 2 shows schematically the situation in which the second piston portion is in the initial position
  • Figure 3 is a view schematically showing the state of the first piston and the second piston in the influent and hydration phases;
  • Fig. 4 is a view schematically showing the water supply passage, the water supply passage, the first piston and the second piston in the inflowing, replenishing end phase State
  • Figure 5 is a view schematically showing the communication state of the first piston, the second piston and the passages in the tank at the end of the water inlet;
  • Figure 6 is a partial view showing the communication state of the first piston, the second piston and the passages in the tank when the lifter reversing valve stem is ready to drain;
  • Figure 7 is a view schematically showing the communication state of the first piston, the second piston and the respective passages inside the drain stage tank;
  • FIG. 8A-8C show two embodiments of the pressure relief and/or bulletproof portion of the present invention, wherein Fig. 8A is a schematic structural view of the spring restricting unit; Fig. 8B is a schematic view showing the bolt gradually releasing energy from the spring when disassembled; 8C schematically shows the set position of the pressure relief port.
  • 1 is a perspective view showing an internal component configuration of the flushing mechanism 100 of the present invention; and FIG. 2 is a schematic view showing a state in which the second piston portion is in an initial position.
  • the flushing mechanism of the present invention comprises: a cylindrical casing 1 having an open upper portion and an opening at the center of the lower end for forming a flow to the interior of the cylinder 1 to define storage water and to accommodate the flushing mechanism 100.
  • a chamber 1_1 of the inner member a lower end portion of the casing 1 is provided with a plurality of pipes for respectively forming a water flow passage with the chamber 1-1; and a screw 2 which is disposed in the casing in a longitudinal direction coincident with the center line of the casing 1 2; a sleeve 3 which is sleeved around the screw 2;
  • the first piston 4 includes a first piston bottom 4-1 having a central bore and a central bore from the first piston bottom 4-1
  • the first piston cylindrical portion 4-2 extending upwardly, the outer diameter of the first piston bottom portion 4-1 is slightly smaller than the inner diameter of the casing 1, by means of the first piston sealing assembly 4-3, the first piston 4 and the casing 1 can be reciprocally reciprocated up and down.
  • first piston 4 is mounted coaxially around the sleeve 3, the cylindrical portion 4-2 of the first piston 4 is hollow, and the screw 2 and the sleeve 3 pass through the first piston cylindrical portion 4-2. And a central hole of the first piston bottom 4-1; a first piston loading spring 5 which is sleeved around the cylindrical portion 4-2 of the first piston 4, one end of which is fixed to the inner side of the top cover of the upper cover 6, and the other end is fixed On the upper surface of the bottom 4-1 of the first piston 4, to the first piston 4 a force application; a casing upper cover 6 having a shape adapted to surround the first piston loading spring 5 and fixing the first piston loading spring 5 to the inner side of the upper end surface, and a top cover 7 is provided on the outer side of the top of the upper cover 6 of the casing , to close the upper end of the upper cover 6 of the box.
  • the lower portion of the upper cover 6 is combined with the case 1 as a part of the case 1.
  • the through cover 6 is also provided with a pluralit
  • the flushing mechanism further includes a second piston 8 including a second piston bottom 8-1 having a central bore and a second piston cylindrical portion extending upward from a central bore periphery of the second piston bottom 8-1.
  • a second piston seal assembly 8-3 is disposed on the outer periphery of the second piston bottom 8-1
  • a second piston seal assembly 8-4 is disposed around the center hole of the second piston bottom 8-1.
  • the second piston bottom 8.1, the second piston seal assemblies 8-3 and 8-4 and the lower end of the casing 1 define an outer lower chamber 8-5 and an inner lower chamber 8-6.
  • the second piston 8 is also provided with a second piston loading spring 9, which can be sleeved around the portion of the sleeve 3 of the hollow inner side of the cylindrical portion 8-2 of the second piston.
  • One end of the second piston loading spring 9 is fixed to the inner side of the upper end of the cylindrical portion 8-1 of the second piston 8, and one end is fixed to the fixed end 10 of the sleeve 3.
  • the flushing mechanism may further include a guide rod 17 for guiding the piston 4 to reciprocate up and down and having a bulletproof function.
  • the guide rod 17 can be tubular.
  • a water supply passage 11 and a water supply passage 12 are provided, and the water supply passage 11 and the water supply passage 12 can be sleeved with the center line to reduce the space.
  • the flushing mechanism 100 preferably further includes a water level travel switch 13. As described above, the reversing valve stem 14, the passages 11 and 12, and the water level stroke switch 13 can pass through the casing upper cover 6 to the inside of the casing 1.
  • the lower part of the tank 1 may be provided with a water outlet flange 19 (see Fig. 8C) for drainage.
  • the first piston seal assembly 4-3 and the second piston seal assemblies 8-3 and 8-4 are composed of an outer seal member and an inner seal member, respectively.
  • the outer seal is an elastic seal formed by bending a metal sheet, the curved shape of which is adapted to hold the inner seal.
  • the inner seal is constructed of an O-ring.
  • the flushing mechanism can also include a portion 16 that stabilizes the water pressure.
  • Fig. 2 schematically shows the case where the first piston 4 and the second piston 8 are in the initial position.
  • the water in the chamber 1-1 has been emptied, at this time the bottom 4-1 of the first piston 4 is at the lowest position (bottom dead center;) under the force of the first piston loading spring 5; .
  • the second piston 8 is also held at the lowest position by the downward pressure of the first piston 4, the outer lower chamber 8-5 of the second piston 8 is sealed, the internal pressure is atmospheric pressure, and the inner lower chamber 8-6
  • the internal pressure is atmospheric pressure, the water outlet is closed, and the water supply passage 11 and the water supply passage 12 and the portion associated therewith are closed.
  • the chamber 1-1 is open to the atmosphere, and the upper surface of the first piston bottom 4-1 is also subjected to atmospheric pressure. At this time, the resultant force acting on the upper surface of the first piston bottom 4-1 is F.
  • Fig. 3 schematically shows the state of the first piston 4 and the second piston 8 in the water inflow and hydration phases.
  • the water supply passage 11 and the water supply passage 12 are in communication with a water supply source (not shown) by the control of the water level stroke switch 13, and a water flow enters the water tank 1 from the water supply passage 11, as indicated by an arrow AA, and another water flow
  • the water storage bay that enters the toilet from the hydration passage 12 is indicated by arrow BB.
  • the force G of the first piston 4 by the water pressure from the pipe is greater than the resultant force F of the first piston loading spring 5 and the atmospheric pressure in the chamber 1-1, and the first piston 4 moves upward and acts on the second piston.
  • the hydraulic force M on the second piston bottom 8-1 of 8 is greater than the upward force H of the second piston loading spring 9, and the second piston 8 remains in the lowest position.
  • Fig. 4 schematically shows the state of the first piston 4 and the second piston 8 at the end of the water inflow and the end of the hydration.
  • the first piston 4 is moved up to the push stroke limit 13 switch to move a certain distance, and the water level travel switch 13 closes the passage of the water supply passage 12 and the water supply source (not shown), and stops supplying water to the water supply passage 12, and the water supply passage at this time 11 is still in communication with a water supply source (not shown) and continues to supply water as indicated by arrow AA.
  • the second piston 8 overcomes the upward force H of the second piston loading spring 9 under the action of the force M to keep the lowest position.
  • Figure 5 is a view schematically showing the first piston 4 and the second piston in the flushing mechanism 100 at the end of the water inflow phase.
  • the first piston 4 continues to move upward to push the water level limit switch 13 to move a certain distance, close the passage of the water inlet passage 11 and the water supply source (not shown), stop supplying water to the water inlet passage 11, and simultaneously replenish the water passage 12 and the water supply.
  • the passage of the source (not shown) is still not connected, the water supply is completed, and the tank 1 is filled with a predetermined amount of water.
  • the first piston loading spring 5 is compressed to store energy.
  • An upward thrust is generated under the action of the water pressure in the casing 1, the thrust is equal to the downward elastic force of the first piston loading spring 5, the first piston 4 is maintained at the top dead center position, and the second piston 8 is at the force M. Work The bottom position is still maintained.
  • Fig. 6 partially shows the communication state of the first piston 4, the second piston 8 and the respective passages in the casing 1 when the lift-reversing valve stem 14 is ready for drainage.
  • Fig. 7 is a view schematically showing the communication state of the first piston 4, the second piston 8, and the respective passages in the drain stage casing 1.
  • a button (not shown) is pressed, and the reversing valve stem 14 is lifted upward in the direction of the arrow C by a link reversing device (not shown).
  • the valve 15 is switched to open the passage, and the outer lower chamber 8-5 of the second piston 8 communicates with the chamber 1-1 in the casing 1, and water flows from the chamber 1-1 to the outer lower chamber of the second piston 8.
  • the second piston cylindrical portion 8-2 of the second piston 8 is from the bottom of the second piston 8-
  • the upper surface of the upper surface of the first surface forms a shape having a reduced outer diameter and forms a ramp portion 18 in the transition portion having a reduced outer diameter, so that the speed of the second piston 8 decreases as it ascends toward the first piston 4 to obtain Buffer effect.
  • the water level stroke switch 13 is reset, the water supply passage 11 and the water supply passage 12 are closed, and the first piston 4 is moved downward to the bottom dead center by the downward thrust of the first piston loading spring 5, and the second piston 8 Return to the lowest position under the action of force, thus completing a water intake-drain cycle.
  • the present invention has taken a series of safety precautions in order to solve the safety problem that the plastic casing is deteriorated or the casing is broken to cause damage to the surrounding facilities due to accidental collision or dropping during installation and use.
  • FIGS. 8A-8C are schematic views of two embodiments of the pressure relief and/or bulletproof portion of the present invention, wherein Fig. 8A is a schematic view showing the structure of the spring restricting unit; Fig. 8B is a view showing the bolt gradually releasing energy from the spring when disassembled; Fig. 8C is a view schematically showing the set position of the pressure releasing port.
  • the pressure relief and/or ballistic resistant portion of the present invention can take a variety of forms, such as a spring limiting unit 800.
  • the spring limiting unit 800 includes a top cover 7, at least one screw 2, a first piston loading spring 5, and a water outlet flange 19.
  • the screw 2 is inserted into the chamber 1-1 of the casing 1 in parallel or coincident with the center line of the casing 1 in the longitudinal direction and is disposed in the casing 3.
  • One end of the screw 2 is fixed to the inner side of the top cover 7, and the other end is fixed to the water outlet flange 19.
  • Fig. 8B when the rinsing mechanism 100 is disassembled, the long screw 2 is disengaged until the energy of the spring 5 is completely released, so that an accident can be avoided.
  • the spring restricting unit 800 may further include a plurality of screws disposed in parallel with the center line of the casing 1 in the longitudinal direction around the first piston loading spring 5 and the second piston loading spring 9.
  • the pressure relief and/or ballistic portion may also be at least one pressure relief port 20 disposed slightly above the upper periphery of the casing 1 above the top dead center of the first piston 4. If the water level travel switch 13 fails, the first piston 4 continues to move upward to the pressure relief port 20, and water can flow out of the pressure relief port 20, thereby protecting the tank from being overwhelmed by the water supply pressure.
  • the pressure relief and/or ballistic portion may also be a ballistic and/or pressure relief safety valve, or may be any combination of a spring limiting unit and/or the at least one pressure relief port and/or the ballistic-pressure relief valve.
  • the above-described embodiments are for illustrative purposes only and are not to be construed as limiting the invention.
  • the case 1 may be cylindrical, elliptical, or other shape; the reversing valve stem 14 and the reversing valve 15 may be manually manipulated, and the commutation operation may be automatically realized by a known component such as light control or voice control.
  • the water inlet passage 11, the water supply passage 12, and the reversing valve stem 14 are not necessarily arranged in a coaxial nested form, but they may be separately provided. Such changes and modifications are intended to fall within the scope of the invention as claimed.
  • the flushing mechanism of the present invention Since the flushing mechanism of the present invention has a simple and compact structure, it can be installed on the outside of the toilet, or can be built in the rear side or the lower part of the toilet, or even in the wall corresponding to the position of the toilet, so that it is a toilet
  • the styling design provides great flexibility, that is, the rinsing mechanism of the present invention can be adapted to any toilet styling. This will undoubtedly better meet the various needs of places such as renovation toilets.
  • the invention greatly improves the flushing efficiency by utilizing the spring force of the loading spring and the pressure of the water supply, thereby achieving low pressure water supply and saving water for each flushing cycle. Tests have shown that with the flushing mechanism of the present invention, the amount of water used in the flushing cycle that meets the desired flushing effect can be reduced to 4 L/time. As noted above, the present invention can be used in other places where flushing of contaminants and/or sewage, in addition to being suitable for flushing sanitary equipment such as toilets.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Detergent Compositions (AREA)

Description

冲洗机构 技术领域
一般而言，本发明涉及一种用于冲洗污物和 /或污水的冲洗机构，尤其涉 及一种适用于冲洗如抽水马桶之类的卫浴设备的冲洗机构， 该冲洗机构可利 用加载弹簧的弹力和水的压力，致使所需水压低，每次冲洗循环的耗水量少、 结构简单、 噪音低、 安装方便、 适于内置或安装于马桶外部。 背景技术
在世界范围内水资源日趋匮乏， 因此有效利用水资源、 改进各种耗水设 施已成为各国从事环境卫生研究的科技人员普遍关注的重要问题之一。
厕所冲洗设备广泛用于家庭、 旅店或各种人类活动场所， 由于其使用的 普遍性， 其冲洗机构是否节约水尤显重要。 国家建设部曾要求厕所每次冲洗 循环的耗水量应低于 6升， 这对致力于卫浴领域的研究人员来说， 无疑是一 种挑战。
众所周知， 冲洗水的储能越大， 冲洗效果越好， 即达到同样冲洗效果所 需水量越少。 因此提高冲洗水的储能是节约水资源的有力措施之一。
与利用空气压缩贮能的方式提高厕所冲洗设备的冲洗效果的技术方案 相比， 利用弹簧加载贮存能量的技术方案具有很多优点。 以厕所的冲洗机构 为例， 由于贮能元件是弹簧而不是空气， 对弹簧可施加预压缩力， 弹簧贮能 的能效比远高于空气压缩贮能， 所以釆用弹簧贮能可避免出现在压缩空气贮 能过程中必然存在的如： （1 )排水开始时压力高、 水流快、 对马桶壁的冲击 力大且噪声大， 排水后期需稳定供水时水压迅速下降， 冲力不足， 若要达到 期望的冲力必须进一步提高供水压力； （2 )若壳体因反复受压-恢复引起材料 疲劳、老化或因意外碰撞而产生裂缝或损坏，爆破时空气和碎片沿四周发散， 方向无法控制， 因此存在安全隐患等缺陷。 因此， 人们越来越趋向于开发利 用弹簧贮能的冲洗装置。
美国专利 4984311 (以下称为对比文件 1 )公开了一种低耗水量的冲洗 机构， 其包括塑料壳体、 贮水器和液压启动系统， 贮水器中设有活塞， 活塞 通过机械式压缩活塞弹簧偏置于贮水器中。 冲水阀关闭、 水充满贮水器中待 用时， 活塞受水的压力（等于管道水压）作用克服弹簧向下的弹力向上移动， 活塞停止移动时， 作用于活塞上的向上的水压与加载弹簧的压力相等。 贮水 器的底部固定有冲水阀体， 冲水阀体具有中心开口。 冲水阀杆沿贮水器中央 部分延伸， 阀杆的第一端部与冲水阀相连， 阀杆的第二端部与冲水阀板相连。 冲水阀板上固定有冲水阀弹簧， 冲水阀板由于冲水阀弹簧的作用偏置于待用 位置。 冲洗时， 启动冲洗按钮， 管道中的水经接头流入起动室的间隙， 使启 动室加压至供水压力。 该水压作用于冲水阀板产生对冲水阀弹簧施压的力， 推动冲水阀杆向上移动， 使冲水阀离开冲水阀体而开启排出口。
该冲洗机构中还设有卷动隔膜， 该卷动隔膜用于防止贮水器中的水流到 第一活塞外和防止水与第一活塞弹簧接触。
如上所述， 在此文件中釆用了塑料壳体， 塑料老化或安装、 使用中不慎 碰撞、 跌落等可能导致壳体破裂而使弹簧释放能量， 这种瞬间能量释放非常 强大， 对周围设施将造成危害甚至危及周围人群的生命安全。 此外， 釆用卷 动隔膜密封虽然效果很好， 但隔膜受压且经受反复翻折， 容易受损， 进而直 接影响冲洗机构的使用寿命。 再者， 液压启动系统， 结构复杂， 维修不便。
WO 02/46540 (以下称为对比文件 2 )披露了一种排放液体量的装置， 其包括带有入口和出口的壳体、 弹簧加载的活塞、 入口阀和出口阀。 出口阀 呈弹簧加载双头密封活塞的形式，该弹簧加载双头密封活塞包括处于其一端、 用于关闭出口的密封表面和处于其另一端、 相对的致动表面。 致动表面被定 位成通过限定于壳体内的致动室内的具有一定压力的水致动。 入口阀为电磁 开关的形式。
在该装置中釆用了电磁开关， 因此， 在设置这种装置之处需要电源， 而 且结构复杂。 虽然对比文件 2没有揭示其壳体的材料， 但若釆用金属壳体将 增加装置的成本和重量， 若釆用塑料壳体则对比文件 2和对比文件 1一样， 也存在因壳体老化或安装、 使用中不慎碰撞、 跌落等导致壳体破裂而对周围 设施造成危害甚至危及周围人群的生命安全的问题。
以上对比文件作为本申请的参考文件， 它们的全部内容均加入本申请 中。
另一方面， 随着生活水平提高， 人们越来越看重居室或宾馆的个性化装 修， 因此， 赋予卫浴设备设计更大的灵活性也是卫浴领域研究人员的努力方 向之一。 发明内容
基于上面所提到的现有技术的缺陷， 本发明的目的是提供一种用于冲洗 污物和 /或污水、 尤其适用于冲洗抽水马桶的冲洗机构， 该冲洗机构既利用了 加载弹簧的弹力和水的压力而使水压低、 每次冲洗循环的耗水量少， 又能确 保安全、 安装方便、 适于各种造型的马桶。
根据本发明， 实现所述目的的冲洗机构包括： 箱体， 其上部敞开， 下部 中心设有开口， 箱体内侧限定出贮存水及容纳各部件的腔室， 箱体的下端部 设有多根管道用于分别与由箱体限定出的腔室形成水流通道； 箱体上盖， 其 下部与箱体结合； 套管， 其中心线与箱体的中心线重合地贯穿于腔室中； 第 一活塞， 其包括具有中心孔的第一活塞底部和从第一活塞底部的中心孔周边 向上延伸的第一活塞圓柱形部， 第一活塞底部的侧面沿径向设有凹槽， 第一 活塞圓柱形部呈中空状， 套管穿过该第一活塞圓柱形部和第一活塞底部的中 心孔； 第一活塞密封组件， 其位于第一活塞底部侧面的凹槽中， 使得第一活 塞可沿箱体的内壁密封地上下往复运动； 第一活塞加载弹簧， 其一端固定于 箱体上盖的顶部内侧， 另一端固定于第一活塞底部的上表面上， 以对第一活 塞施力； 第二活塞， 其包括具有中心孔的第二活塞底部和从第二活塞底部的 中心孔周边向上延伸的第二活塞圓柱形部， 第二活塞圓柱形部呈中空状， 套 管穿过该第二活塞圓柱形部和第二活塞底部的中心孔； 第二活塞加载弹簧， 其套设于第二活塞圓柱形部的中空形内侧的套管部分的周围， 一端固定于第 二活塞圓柱形部的上端内侧， 一端固定于套管的固定端， 其中， 还包括位于 箱体中的卸压和 /或防弹部分；在所述第二活塞底部的外侧周边和中心孔周边 分别设有第二活塞密封组件； 第二活塞底部、 第二活塞密封组件及箱体的下 端部限定出外下腔室和内下腔室， 用于在排水阶段与第二活塞加载弹簧协同 作用使第二活塞向上运动， 从而开启排水口。
优选卸压和 /或防弹部分为弹簧限制单元。 该弹簧限制单元可包括顶盖、 至少一根螺杆、 第一活塞加载弹簧及出水口法兰， 所述螺杆沿纵向与箱体的 中心线平行或重合地贯穿于该箱体的所述腔室中， 螺杆的一端固定于顶盖的 内侧， 另一端固定于所述出水口法兰中。
或者， 本弹簧限制单元也可包括一根螺杆， 该螺杆与箱体的中心线重合 地设置于套管内。 当然， 还可以类似方式围绕第一和第二活塞加载弹簧平行 地设置多根螺杆。 优选卸压和 /或防弹部分为沿箱体上部周边略高于第一活塞的上止点之 处设置的至少一个卸压口。
卸压和 /或防弹部分也可以是防弹 -卸压安全阀。
当然， 卸压和 /或防弹部分还可以是弹簧限制单元和 /或所述至少一个卸 压口和 /或防弹 -卸压安全阀的任意组合。
优选本冲洗机构还包括用于安装该冲洗机构的导杆， 该导杆起导引第一 活塞和防弹的作用。
第一活塞的密封组件和第二活塞的密封组件可以由内、 外密封件组成， 内密封件可包括由金属片弯曲而成的弹性件，外密封件可包括 0形圈。显然， 第一活塞密封组件和第二活塞密封组件的结构可以相同， 也可不同。
优选本冲洗机构还包括水位行程开关， 该开关通过被第一活塞推动一定 距离而控制进水通道和补水通道的连通和关闭。
优选本冲洗机构还包括稳压部分。
本发明的箱体可以是圓柱形、 椭圓柱形、 或其他形状。
由于利用了加载弹簧的弹力和供给水的压力， 本发明的冲洗机构结构可 节约每次冲洗循环的用水并能达到很好的冲洗效果。 试验表明， 釆用本发明 的冲洗机构， 可在满足要求的冲洗效果的前提下将冲洗循环的用水量降低到 4L/次。
由于本发明设有如弹簧限制单元和卸压口之类的卸压和 /或防弹部分，当 水位行程开关出现故障时， 第一活塞继续向上移动至卸压口， 水可从卸压口 流出， 保护箱体不会被供水压力涨破； 拆卸冲洗机构时长螺杆一直到弹簧能 量完全释放才脱开， 故可避免事故发生。
此外， 本发明简单地利用第二活塞密封组件与箱体下端部端面密封形成 外下腔室和内下腔室，再借助第二活塞加载弹簧的弹力使第二活塞向上运动， 因此， 结构简单、 紧凑、 体积小、 安装方便， 可适应于各种造型的马桶， 还 可灵活地或装于马桶外侧， 或内置于马桶内部， 甚至于可装于墙壁内， 因而 能赋予卫浴设备设计更大的灵活性并能理想地满足各种装修需求。 附图说明
下面以抽水马桶为例结合附图所示的实施例对本发明进行详细描述。 在 全部附图中相同部件用相同附图标记表示。 图 1的透视图示出了本发明的冲洗机构的内部部件配置情况；
图 2示意地示出了第二活塞部分处于初始位置的情况；
图 3示意地示出了进水、 补水阶段第一活塞和第二活塞的状态； 图 4示意地示出了进水持续、 补水结束阶段供水通道、 补水通道、 第一 活塞及第二活塞的状态；
图 5示意地示出了进水结束阶段箱体内第一活塞、 第二活塞及各通道的 连通状况；
图 6局部地示出了提拉换向阀杆准备排水时箱体内第一活塞、 第二活塞 及各通道的连通状况；
图 7示意地示出了排水阶段箱体内部第一活塞、 第二活塞及各通道的连 通状况；
图 8A-8C示出了本发明的卸压和 /或防弹部分的两个实施例， 其中， 图 8A为弹簧限制单元的结构示意图； 图 8B为拆卸时螺栓使弹簧逐渐释放能量 的示意图； 图 8C示意地示出了泄压口的设置位置。 具体实施方式 图 1的透视图示出了本发明的冲洗机构 100的内部部件配置情况； 图 2 示意地示出了第二活塞部分处于初始位置的情况。 参见图 1和图 2, 本发明 的冲洗机构包括： 呈圓柱形的箱体 1 , 其上部敞开， 下端中心设有开口， 用 于形成流向圓柱体 1内部限定出贮存水及容纳冲洗机构 100的内部部件的腔 室 1_1 , 箱体 1的下端部设有多条管道用于分别与腔室 1-1形成水流通道； 螺 杆 2, 其沿纵向与箱体 1的中心线重合地设置于箱体 2中； 套管 3 , 其同中心 线地套设于螺杆 2的周围； 第一活塞 4, 其包括具有中心孔的第一活塞底部 4-1和从第一活塞底部 4-1的中心孔周边向上延伸的第一活塞圓柱形部 4-2, 第一活塞底部 4-1的外径略小于箱体 1的内径，借助于第一活塞密封组件 4-3 , 第一活塞 4与箱体 1可密封地上下往复运动。 此外， 第一活塞 4同中心线地 安装于套管 3的周围，第一活塞 4的圓柱形部 4-2呈中空状，螺杆 2和套管 3 穿过第一活塞圓柱形部 4-2和第一活塞底部 4-1的中心孔； 第一活塞加载弹 簧 5 , 其围绕第一活塞 4的圓柱形部分 4-2套设， 一端固定于箱体上盖 6的 顶部内侧， 另一端固定于第一活塞 4的底部 4-1的上表面上， 以对第一活塞 4施力； 箱体上盖 6,其具有适于包围第一活塞加载弹簧 5并将第一活塞加载 弹簧 5固定于上端面内侧的形状， 箱体上盖 6的顶部外侧设有顶盖 7 , 以封 闭箱体上盖 6的上端。 箱体上盖 6的下部与箱体 1结合而作为箱体 1的一部 分。箱体上盖 6上还设有一些通孔，以便如水位行程开关 13之类的部件穿过。
另外， 本冲洗机构还包括第二活塞 8, 第二活塞 8包括具有中心孔的第 二活塞底部 8-1和从第二活塞底部 8-1的中心孔周边向上延伸的第二活塞圓 柱形部 8-2, 第二活塞圓柱形部 8-2呈中空状， 螺杆 2和套管 3穿过第二活塞 圓柱形部 8-2和第二活塞底部 8-1的中心孔。第二活塞底部 8-1的外侧周边设 有第二活塞密封组件 8-3 ,第二活塞底部 8-1的中心孔周边设有第二活塞密封 组件 8-4。 第二活塞底部 8-1、 第二活塞密封组件 8-3和 8-4及箱体 1的下端 部限定出外下腔室 8-5和内下腔室 8-6。
与第一活塞 4类似， 第二活塞 8也设有第二活塞加载弹簧 9, 可将该加 载弹簧套设于第二活塞圓柱形部 8-2的中空形内侧的套管 3的部分的周围， 第二活塞加载弹簧 9的一端固定于第二活塞 8的圓柱部 8-1的上端内侧， 一 端固定于套管 3的固定端 10。
此外， 本冲洗机构还可包括导杆 17 , 以导引活塞 4上下往复运动并具有 防弹的功能。 为使结构紧凑并简化结构， 导杆 17可呈管状。 此外， 还设有供 水通道 11和补水通道 12, 可将供水通道 11和补水通道 12同中心线地套设， 以减小空间。 为使结构紧凑， 优选将换向阀 15的换向阀杆 14与供水通道 11 和补水通道 12同中心线地设置。
另外， 冲洗机构 100优选还包括水位行程开关 13。 如上所述， 换向阀杆 14、 通道 11和 12及水位行程开关 13可穿过箱体上盖 6到达箱体 1内部。
箱体 1的下部可设有出水口法兰 19 (见图 8C ), 用于排水。
优选第一活塞密封组件 4-3和第二活塞密封组件 8-3和 8-4分别由外密 封件和内密封件组成。
优选外密封件为由金属片弯曲而成的弹性密封件， 其弯曲形状适于抱紧 内密封件。 优选内密封件由 0形圈构成。
本冲洗机构还可包括使水压稳定的部分 16。
以下参考所述附图描述本冲洗机构 100的工作过程。
初始阶段
图 2示意地示出了第一活塞 4和第二活塞 8处于初始位置的情况。 如图 2所示， 在初始位置， 腔 1-1内水已排空， 此时第一活塞 4的底部 4-1在第一 活塞加载弹簧 5的力的作用下处于最低位置（下止点；)。第二活塞 8在第一活 塞 4向下的压力的作用下也保持在最低位置， 第二活塞 8的外下腔室 8-5被 密封， 内部压力为大气压， 内下腔室 8-6的内部压力为大气压， 出水口关闭， 供水通道 11和补水通道 12及与其相关联的部分处于关闭状态。在初始阶段， 腔室 1-1与大气相通， 第一活塞底部 4-1的上表面也受大气压力的作用， 此 时， 作用在第一活塞底部 4-1上表面上的合力为 F。
进水、 补水阶段
图 3示意地示出了进水、 补水阶段第一活塞 4和第二活塞 8的状态。 参 见图 3 , 通过水位行程开关 13的控制， 供水通道 11和补水通道 12与供水源 (未示出 )连通， 一股水流从供水通道 11进入水箱 1 , 如箭头 A-A所示， 另 一股水流从补水通道 12进入马桶的存水湾如箭头 B-B所示。此时第一活塞 4 受来自管道的水压的作用力 G大于第一活塞加载弹簧 5和腔室 1-1内的大气 压力的合力 F, 第一活塞 4向上移动， 而作用于第二活塞 8的第二活塞底部 8-1上的水压的作用力 M大于第二活塞加载弹簧 9的向上的力 H, 第二活塞 8保持最低位置不动。
进水持续、 补水结束阶段
图 4示意地示出了进水持续、 补水结束阶段第一活塞 4和第二活塞 8的 状态。 参见图 4, 第一活塞 4上行到推动行程限位 13开关移动一定距离， 水 位行程开关 13关闭补水通道 12与供水源 （未示出） 的通路， 停止向补水通 道 12供水， 此时供水通道 11仍与供水源 （未示出）连通， 继续供水， 如箭 头 A-A所示。 第二活塞 8在力 M的作用下克服第二活塞加载弹簧 9的向上 的力 H保持最低位置不动。
进水结束阶段
图 5示意地示出了进水结束阶段冲洗机构 100内第一活塞 4及第二活塞
8的状态。 参见图 5 , 第一活塞 4继续向上移动推动水位行程开关 13移动一 定距离， 关闭进水通道 11与供水源 （未示出） 的通路， 停止向进水通道 11 供水， 同时补水通道 12与供水源（未示出）的通路仍不连通， 供水完毕， 箱 体 1内充满预定量的水。 此时， 第一活塞加载弹簧 5被压缩， 贮蓄能量。 在 箱体 1内的水压强的作用下产生向上推力， 此推力与第一活塞加载弹簧 5的 向下的弹力相等， 第一活塞 4保持在上止点的位置， 第二活塞 8在力 M的作 用下仍维持最低位置不动。
排水阶段
图 6局部地示出了提拉换向阀杆 14准备排水时箱体 1内第一活塞 4、第 二活塞 8及各通道的连通状况。 图 7示意地示出了排水阶段箱体 1内第一活 塞 4、 第二活塞 8及各通道的连通状况。
如图 6和图 7所示， 需要冲洗便池时， 按下按钮（未示出）， 通过连杆 换向装置 （未示出） 沿箭头 C的方向向上提升换向阀杆 14, 换向阀 15进行 转换， 开启通道， 第二活塞 8的外下腔室 8-5与箱体 1 内的腔室 1-1连通， 水从腔室 1-1流到第二活塞 8的外下腔室 8-5 , 在第二活塞底部 8-1外侧周边 的第二活塞密封组件 8-3和第二活塞底部 8-1的中心孔周边的第二活塞密封 组件 8-4之间的第二活塞 8的相应面积上向下的水压力与向上的水压力 4氐消， 而与第二活塞底部 8-1的中心孔周边的第二活塞密封组件 8-4相应的第二活 塞 8的面积上仍受向下的水压的作用。 当第二活塞底部 8-1的中心孔周边的 第二活塞密封组件 8-4相应的第二活塞 8的面积上受到的向下的水压作用力 小于第二活塞加载弹簧 9的向上的力时，第二活塞 8向上移动，开启排水口， 水从排水口排出。
排水开始一段时间、 第二活塞 8向上移动一定距离后， 第二活塞 8的下 部水压力与相应部分的上部水压力相互 ·ί氏消， 在第二活塞加载弹簧 9的力的 作用下， 第二活塞 8将向上加速移动。 为避免因第二活塞 8向上移动过快而 撞击第一活塞 4产生噪音并导致第一、 第二活塞损坏， 第二活塞 8的第二活 塞圓柱形部 8-2从第二活塞底部 8-1的上表面一定距离处向上形成外径减小 的形状并在外径减小的过渡部段内形成斜台部 18,使第二活塞 8在上行到临 近第一活塞 4时速度降低， 以获得緩冲效果。
排水结束后， 水位行程开关 13复位， 供水通道 11和补水通道 12被关 闭， 第一活塞 4在第一活塞加载弹簧 5的向下的推力作用下向下移动至下止 点， 第二活塞 8在力 Μ的作用下返回到最低位置，从而完成一次进水一排水 循环。
如前所述， 为了解决塑料壳体老化或因安装、 使用中不慎而碰撞、 跌落 等导致壳体破裂对周围设施造成危害的安全问题， 本发明釆取了一系列安全 防范措施。
图 8A-8C为本发明的卸压和 /或防弹部分的两个实施例的示意图， 其中， 图 8A为弹簧限制单元的结构示意图； 图 8B为拆卸时螺栓使弹簧逐渐释放能 量的示意图； 图 8C示意地示出了泄压口的设置位置。
如图 8A所示， 本发明的卸压和 /或防弹部分可以为多种形式， 例如可以 是一种弹簧限制单元 800。 弹簧限制单元 800包括顶盖 7、 至少一根螺杆 2、 第一活塞加载弹簧 5及出水口法兰 19。 螺杆 2沿纵向与箱体 1的中心线平行 或重合地贯穿于箱体 1的腔室 1-1中且设置于套管 3内。 螺杆 2的一端固定 于顶盖 7的内侧， 另一端固定于出水口法兰 19中。 如图 8B所示， 拆卸冲洗 机构 100时长螺杆 2直至弹簧 5能量完全释放后才脱开， 因此可避免发生事 故。
弹簧限制单元 800还可包括围绕所述第一活塞加载弹簧 5和第二活塞加 载弹簧 9沿纵向与箱体 1的中心线平行地设置的多根螺杆。
如图 8C所示， 卸压和 /或防弹部分也可以是沿箱体 1的上部周边略高于 所述第一活塞 4的上止点之处设置的至少一个卸压口 20。若水位行程开关 13 出现故障， 第一活塞 4继续向上移动至卸压口 20, 水可从卸压口 20流出， 从而保护箱体不被供水压力涨破。
当然， 卸压和 /或防弹部分还可以是防弹和 /或卸压安全阀， 或者可以是 弹簧限制单元和 /或所述至少一个卸压口和 /或防弹 -卸压安全阀的任意组合 值得一提的是， 上面所举的实施例只为了说明， 而不应理解为是对本发 明的限制。 本领域技术人员在不超出本发明的范围和构思的前提下， 可以作 出各种改型。 例如箱体 1可以为圓柱形、 椭圓形、 或其他形状； 可手动操纵 换向阀杆 14和换向阀 15 , 也可利用如光控、 声控之类的公知组件自动实现 换向操作。 另外， 进水通道 11、 补水通道 12和换向阀杆 14也不一定设置成 同轴的套叠形式， 而可以将它们分开设置。 这些变换和改型均应落入本发明 权利要求所请求保护的范围内。
由于本发明的冲洗机构结构简单、 紧凑， 既可将其装于马桶外侧， 又可 将其内置于马桶的后侧或下部， 甚至还可安装于与马桶位置相应的墙壁内， 因此为马桶的造型设计提供了非常大的灵活性， 也就是说， 本发明的冲洗机 构可适用于任何马桶造型。这无疑能更好地满足装修厕所等场所的各种需求。
本发明由于利用了加载弹簧的弹力和供给水的压力， 大大地提高了冲洗效 率， 既可实现低压供水又节约了每次冲洗循环的用水。 试验表明， 釆用本发明 的冲洗机构， 可使满足要求的冲洗效果的冲洗循环的用水量降低到 4L/次。 如上所述， 本发明除适用于冲洗如抽水马桶之类的卫浴设备外， 还可用 于其他冲洗污物和 /或污水之处。

Claims

权利要求
1. 一种冲洗机构 （100), 包括：
箱体（1 ), 其上部敞开， 下部中心设有开口， 内侧限定出贮存水及容纳 各部件的腔室（ 1-1 ), 下端部设有多条管道用于分别与所述腔室（ 1-1 )形成 水流通道；
箱体上盖 （6), 其下部与所述箱体（1 )结合；
套管（3), 其中心线与所述箱体（1 )的中心线重合地贯穿于腔室（1-1 ) 中；
第一活塞（4), 其包括具有中心孔的第一活塞底部（4-1 )和从该第一活 塞底部（4-1 )的中心孔周边向上延伸的第一活塞圓柱形部（4-2), 所述第一 活塞底部 （4-1 ) 的侧面沿径向设有凹槽， 所述第一活塞圓柱形部 （4-2)呈 中空状， 所述套管（3)穿过所述活塞圓柱形部（4-2)和第一活塞底部（4-1 ) 的中心孔；
第一活塞密封组件（4-3 ), 其位于所述第一活塞底部（4-1 )侧面的凹槽 中， 使得所述第一活塞（4)可沿所述箱体 ( 1 )的内壁密封地上下往复运动； 第一活塞加载弹簧（5), 其一端固定于所述箱体上盖（6)的顶部内侧， 另一端固定于所述第一活塞底部（4-1 )的上表面上， 以对所述第一活塞（4) 施力；
第二活塞（ 8 ), 其包括具有中心孔的第二活塞底部（ 8-1 )和从该第二活 塞底部（8-1 )的中心孔周边向上延伸的第二活塞圓柱形部（8-2), 所述第二 活塞圓柱形部 （8-2)呈中空状， 所述套管 （3) 穿过所述第二活塞圓柱形部 (8-2)和第二活塞底部 (8-1 ) 的中心孔；
第二活塞加载弹簧（9), 其套设于所述第二活塞圓柱形部（8-2)的中空 形内侧的所述套管 ( 3 )部分的周围，一端固定于所述第二活塞圓柱形部 ( 8-2 ) 的上端内侧， 一端固定于所述套管 （3) 的固定端，
其中， 还包括位于所述箱体（1 ) 中的卸压和 /或防弹部分； 在所述第二 活塞底部（8-1 )的外侧周边和中心孔周边分别设有第二活塞密封组件（8-3; 8-4 ); 所述第二活塞底部（ 8-1 )、 第二活塞密封组件（ 8-3; 8-4 )及箱体（ 1 ) 的下端部限定出外下腔室（8-5)和内下腔室（8-6), 用于在排水阶段与所述 第二活塞加载弹簧（9)协同作用使所述第二活塞（8) 向上运动， 从而开启 排水口。
2. 如权利要 1 所述的冲洗机构 （100), 其中， 所述卸压和 /或防弹部分 为弹簧限制单元（800), 该弹簧限制单元（800)包括顶盖（7)、 至少一根螺 杆（2)、 所述第一活塞加载弹簧（5)及出水口法兰（19), 所述螺杆（2)沿 纵向与所述箱体（ 1 ) 的中心线平行或重合地贯穿于该箱体（ 1 ) 的所述腔室 ( 1-1 ) 中， 所述螺杆（2)的一端固定于所述顶盖（7)的内侧， 另一端固定 于所述出水口法兰 （19) 中。
3. 如权利要求 2所述的冲洗机构（ 100 ),其中，所述弹簧限制单元（ 800 ) 包括一根螺杆（2), 其与所述箱体（1 )的中心线重合地设置于所述套管（3) 内。
4. 如权利要求 2所述的冲洗机构（ 100 ),其中，所述弹簧限制单元（ 800 ) 包括围绕所述第一活塞加载弹簧（5)和第二活塞加载弹簧（9)设置的多根 螺杆。
5. 如权利要求 1 所述的冲洗机构 （100), 其中， 所述卸压和 /或防弹部 分为沿所述箱体（ 1 ) 的上部周边略高于所述第一活塞（4) 的上止点之处设 置的至少一个卸压口 （20)。
6. 如权利要求 1 所述的冲洗机构 （100), 其中， 所述卸压和 /或防弹部 分为防弹-卸压安全阀。
7. 如权利要求 1 所述的冲洗机构 （100), 其中， 所述卸压和 /或防弹部 分为弹簧限制单元 ( 800 )和 /或沿所述箱体 ( 1 )的上部周边略高于所述第一 活塞（4)的上止点之处设置的至少一个卸压口 （20)和 /或防弹 -卸压安全阀 的任意组合。
8. 如权利要求 1所述的冲洗机构（ 100), 其中， 所述第一活塞密封组件 (4-3)和第二活塞密封组件（8-3; 8-4) 由内、 外密封件组成。
9. 如权利要求 8所述的冲洗机构 （100), 其中， 所述内密封件（4-3-1 ) 包括由金属片弯曲而成的弹性件， 所述外密封件（4-3-2) 包括 0形圈。
10. 如权利要求 8所述的冲洗机构 （100), 其中， 所述第一活塞密封组 件（4-3)和所述第二活塞密封组件（8-3; 8-4)结构相同。
11. 如权利要求 8所述的冲洗机构 （100), 其中， 所述第一活塞密封组 件（4-3)和所述第二活塞密封组件（8-3; 8-4) 的结构不同。
12. 如前面任一项权利要求所述的冲洗机构 （100), 其中， 还包括用于 安装该冲洗机构（ 100 )的导杆， 该导杆起导引第一活塞（ 4 )和防弹的作用。
13. 如前面任一项权利要求所述的冲洗机构 （100), 其中， 还包括水位 行程开关（ 13 ),其通过被所述第一活塞（4)推动一定距离控制进水通道（ 11 ) 和补水通道（12) 的连通和关闭。
14. 如前面任一项权利要求所述的冲洗机构 （100), 其中， 还包括稳压 部分（16)。
15. 如前面任一项权利要求所述的冲洗机构（ 100 ),其中，所述箱体 ( 1 ) 为圓柱形、 椭圓柱形、 或其他形状。
PCT/CN2009/070363 2008-04-09 2009-02-05 冲洗机构 WO2009124470A1 (zh)

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