WO2015180435A1 - 带气体泄漏报警装置的蓄能器及液压操动机构 - Google Patents

带气体泄漏报警装置的蓄能器及液压操动机构 Download PDF

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Publication number
WO2015180435A1
WO2015180435A1 PCT/CN2014/092209 CN2014092209W WO2015180435A1 WO 2015180435 A1 WO2015180435 A1 WO 2015180435A1 CN 2014092209 W CN2014092209 W CN 2014092209W WO 2015180435 A1 WO2015180435 A1 WO 2015180435A1
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WIPO (PCT)
Prior art keywords
accumulator
piston
magnetic
gas leakage
magnetic steel
Prior art date
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Ceased
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PCT/CN2014/092209
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English (en)
French (fr)
Inventor
张全民
王永良
李海文
雷琴
汪陆
刘煜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ping Gao Group Co Ltd
Henan Pinggao Electric Co Ltd
State Grid Corp of China SGCC
Original Assignee
Ping Gao Group Co Ltd
Henan Pinggao Electric Co Ltd
State Grid Corp of China SGCC
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Publication of WO2015180435A1 publication Critical patent/WO2015180435A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/005—Leakage; Spillage; Hose burst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas

Definitions

  • the invention relates to an accumulator and a hydraulic operating mechanism with a gas leakage alarm device.
  • the existing accumulator generally includes an accumulator cylinder and a piston that is guided to move and fit in the accumulator cylinder, and the piston will accumulate the accumulator.
  • the cylinder is divided into two chambers, left and right, which are respectively a high pressure oil chamber and a pre-inflated chamber.
  • the pre-inflation chamber is filled with gas, and then high-pressure hydraulic oil is introduced into the high-pressure oil chamber to drive the piston in the accumulator to move to the right to compress the pre-filling in the pre-inflating chamber.
  • the energy is stored by the gas; when the circuit breaker is in normal operation, the rated oil pressure of the hydraulic system, that is, the oil pressure of the high pressure oil chamber in the accumulator, is provided by the compressed pre-filled gas and needs to be stable.
  • the pressure of the accumulator compressing the pre-filled gas is usually between 20 and 35 MPa, and the pressure value is directly related to the normal operation of the hydraulic operating mechanism. Therefore, it is necessary to frequently detect whether the pre-filled gas has a leak to ensure hydraulic operation.
  • the normal operation of the moving mechanism and circuit breaker When leak detection is performed on the accumulator in the prior art, in order to ensure the safety of the grid operation and the safety of the inspection personnel, the circuit breaker must be taken out of operation, and the pre-charged gas pressure value is checked to determine whether the pre-charged gas has leaked. On the one hand, the detection method has hysteresis for the discovery of gas leakage, on the other hand, it will affect the normal operation of the circuit breaker, and the detection is inconvenient.
  • the accumulator with the gas leakage alarm device of the present invention adopts a technical solution: an accumulator with a gas leakage alarm device, including an accumulator cylinder and a piston disposed in the accumulator cylinder, the accumulator
  • the cylinder has a pre-inflation chamber separated by a piston, and an end of the accumulator adjacent to the pre-inflation chamber is provided with a piston displacement detecting device for detecting displacement of the piston.
  • the piston displacement detecting device includes a contact rod fixed on the piston and a magnetic proximity switch disposed on a plugging structure corresponding to the corresponding end of the accumulator cylinder, and the contact rod is suspended in the pre-inflating chamber
  • the magnetic proximity switch includes a magnetic steel guided to move on the occlusion structure and a magnetic sensor fixed on the occlusion structure, the yoke having a pressing portion for pressing the magnetic steel .
  • the pressing portion is formed by a flange provided on the overhanging end of the contact rod.
  • the contact rod is provided with an external thread
  • the piston is provided with a corresponding threaded hole
  • the contact rod is screwed into the threaded hole
  • the contact bar is provided with a thread for adjusting the contact rod to be screwed into the threaded hole.
  • the depth of the adjustment nut is provided with an external thread
  • the plugging structure comprises a plug seat embedded at an end of the accumulator cylinder, the inner end surface of the plug seat is provided with a magnetic steel socket for guiding and moving the magnetic steel, and the outer end surface is provided for assembly
  • the sensor mounting hole of the magnetic sensor, the magnetic steel insertion hole and the sensor mounting hole are all blind holes and parallel to each other, and the accumulator cylinder is screwed with an end cover for preventing the plug seat from coming out.
  • the hydraulic operating mechanism of the present invention adopts a hydraulic operating mechanism comprising an accumulator with a gas leakage alarm device, the accumulator comprising an accumulator cylinder and a piston disposed in the accumulator cylinder
  • the accumulator cylinder has a pre-inflation chamber separated by a piston, and an end of the accumulator adjacent to the pre-inflation chamber is provided with a piston displacement detecting device for detecting displacement of the piston.
  • the piston displacement detecting device includes a contact rod fixed on the piston and a magnetic proximity switch disposed on a plugging structure corresponding to the corresponding end of the accumulator cylinder, and the contact rod is suspended in the pre-inflating chamber
  • the magnetic proximity switch includes a magnetic steel guided to move on the occlusion structure and a magnetic sensor fixed on the occlusion structure, the yoke having a pressing portion for pressing the magnetic steel .
  • the pressing portion is formed by a flange provided on the overhanging end of the contact rod.
  • the contact rod is provided with an external thread
  • the piston is provided with a corresponding threaded hole
  • the contact rod is screwed into the threaded hole
  • the contact bar is provided with a thread for adjusting the contact rod to be screwed into the threaded hole.
  • the depth of the adjustment nut is provided with an external thread
  • the plugging structure comprises a plug seat embedded at an end of the accumulator cylinder, the inner end surface of the plug seat is provided with a magnetic steel socket for guiding and moving the magnetic steel, and the outer end surface is provided for assembly
  • the sensor mounting hole of the magnetic sensor, the magnetic steel insertion hole and the sensor mounting hole are all blind holes and parallel to each other, and the accumulator cylinder is screwed with an end cover for preventing the plug seat from coming out.
  • the accumulator with the gas leakage alarm device comprises an accumulator cylinder and a piston disposed in the accumulator cylinder, the accumulator cylinder having a pre-inflated cavity separated by a piston, a piston displacement detecting device for detecting displacement of the piston is disposed at an end of the accumulator near the pre-inflating chamber, and the piston will generate corresponding movement due to a decrease in internal pressure after the gas in the pre-inflating chamber leaks.
  • the position of the piston can be detected by the piston displacement detecting device, so that the gas leakage condition can be known in time, and the alarm position can be set. If the piston is detected to move to the set alarm position, it indicates that the pre-inflating chamber gas has leaked. Maintenance, compared with the prior art, it is not necessary to stop the circuit breaker and then detect the gas pressure to avoid affecting the normal operation of the circuit breaker.
  • FIG. 1 is a schematic structural view of an embodiment of an accumulator with a gas leakage alarm device of the present invention
  • Figure 2 is an enlarged view of the mounting structure of the magnetic proximity switch of Figure 1.
  • the corresponding reference numerals in the figure are: 1 accumulator cylinder, 2 piston, 31 high pressure oil chamber, 32 pre-inflated chamber, 4 contact rod, 41 flange, 5 adjusting nut, 61 plug seat, 611 magnet steel Jack, 612 sensor mounting hole, 62 end cap, 71 magnet, 72 magnetic sensor, 8 limit cap, 9 compression spring.
  • An embodiment of an accumulator with a gas leakage alarm device includes an accumulator cylinder 1 having a plugged structure at both axial ends and an accumulator cylinder.
  • the piston 2 in the piston 2 divides the accumulator cylinder 1 into two chambers, left and right, which are a high pressure oil chamber 31 and a pre-inflation chamber 32, respectively.
  • the accumulator further includes a piston displacement detecting device for detecting a displacement of the piston 2, the piston displacement detecting device including a stem 4 fixed to the piston 2 and a right end disposed at the right end of the accumulator cylinder 1 A magnetic proximity switch on the plugged structure.
  • the contact rod 4 includes a threaded end provided with an external thread and an overhanging end provided with a flange 41.
  • the right end surface of the piston 2 is provided with a threaded hole corresponding to the threaded end, and the thread of the contact rod 4 The end is spun in the threaded hole, and the overhanging end is suspended in the pre-inflating chamber 32.
  • the lever 4 is further provided with an adjusting nut 5 for adjusting the depth of the lever 4 to be screwed into the threaded hole, and the lever 4 can be locked and fixed to the piston 2 after the lever 4 adjusts the overhang.
  • the plugging structure on the left side of the accumulator cylinder 1 is the same as the prior art, and the plugging structure on the right side of the accumulator cylinder 1 includes a plug seat 61 embedded in the end of the accumulator cylinder 1 and used for The plug 61 performs an axially constrained end cap 62.
  • the plug seat 61 has a stepped revolving structure and is formed in a "convex" shape.
  • the end cover 62 is provided with a stepped through hole.
  • the left side of the stepped through hole has a large hole diameter and is provided with an internal thread for screwing and fixing to the external thread of the accumulator cylinder 1; the position of the stepped through hole is changed.
  • the left-facing annular step surface is used to stop the plug 61.
  • the magnetic proximity switch is a prior art, comprising a magnetic steel 71 and a magnetic sensor 72.
  • the left end surface of the plug 61 is provided with a magnetic steel socket 611 for guiding the magnetic steel 71, and the right end surface is provided for
  • the sensor mounting hole 612 of the magnetic sensor 72 is assembled, and the magnetic steel socket 611 and the sensor mounting hole 612 are blind holes and are parallel to each other.
  • a stopper cap 8 for restricting the movement limit of the magnetic steel 71 to the left is fixed to the plug seat 61.
  • the limit cap 8 is provided with a through hole for the magnetic steel 71 to pass through, and the magnetic steel 71 is provided with a limit cap 8 A stop shoulder is provided, and a compression spring 9 is provided between the shoulder and the plug 61 for resetting the magnet 71.
  • the flange 41 provided on the overhanging end of the contact rod 4 forms a pressing portion for pressing the magnetic steel 71 to ensure effective actuation of the magnetic steel 71.
  • the piston 2 in the accumulator moves to the right, so that the pressure of the compressed gas is consistent with the rated oil pressure of the hydraulic system.
  • the piston 2 in the accumulator gradually moves to the right, driving the rod 4 to gradually approach the magnetic steel 71 of the magnetic proximity switch, and finally contacts the magnetic steel 71 and pushes it toward Move right.
  • the magnetic proximity switch When the level of high pressure gas leakage in the pre-inflating chamber 32 reaches a predetermined alarm point, the magnetic proximity switch The magnetic steel 71 moves to a predetermined stroke, triggering the magnetic sensor 72 of the magnetic proximity switch, and the normally open contact of the magnetic sensor 72 is converted into a normally closed contact, and the accumulator is precharged with a gas leakage alarm signal, prompting the staff to The device can be overhauled. After the overhaul is completed, the lever 4 is disengaged from the magnetic steel 71, and the magnetic steel 71 moves to the left under the action of the corresponding return spring, and leaves the alarm position, and the normally closed contact of the magnetic sensor 72 is re-converted into a normally open contact, and the magnetic proximity is The alarm signal of the switch is released.
  • the above-mentioned accumulator with a gas leakage alarm device can automatically detect whether the gas in the accumulator leaks to a predetermined level under the normal operation state of the high-voltage circuit breaker, generate an alarm signal in time, and is convenient to use, thereby improving the operating system. And the reliability of the circuit breaker.
  • An embodiment of the hydraulic operating mechanism of the present invention includes an accumulator and a corresponding transmission mechanism, that is, an accumulator with a gas leakage alarm device in the above embodiment, and the transmission mechanism has the same structure as the prior art. I will not repeat them here.
  • the piston displacement detecting means employs a contact rod 4 and a magnetic proximity switch, the contact rod 4 is fixed to the piston 2, and the magnetic proximity switch is disposed on the blocking structure.
  • the magnetic The proximity switch can also adopt other mounting methods, for example, directly fixing the magnetic steel 71 to the piston 2, and fixing the magnetic inductor to the outer peripheral surface of the accumulator cylinder 1 or the sealing structure, and also the displacement of the piston 2 can be realized.
  • the piston displacement detecting device can also be replaced with other forms, such as a stroke switch or a photoelectric switch, as long as the displacement of the piston 2 can be detected.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)

Abstract

一种带气体泄漏报警装置的蓄能器及液压操动机构，该带气体泄漏报警装置的蓄能器包括：蓄能器筒体（1）和设置在蓄能器筒体内的活塞（2），蓄能器筒体（1）内具有由活塞（2）分隔出的预充气腔（32），蓄能器靠近所述预充气腔（32）的一端设有用于检测所述活塞的位移的活塞位移检测装置。由于预充气腔（32）内气体泄漏后其内压力会降低，活塞将会产生相应移动，因此，通过活塞位移检测装置即可检测活塞的位置，从而及时获知气体泄漏状况，并可以设定报警位置，如果检测到活塞移动到了设定的报警位置，就说明预充气腔（32）内的气体发生了泄漏并需要检修，该装置不需将断路器停止运行再检测气体压力，避免对断路器的正常工作产生影响。

Description

带气体泄漏报警装置的蓄能器及液压操动机构 技术领域
本发明涉及带气体泄漏报警装置的蓄能器及液压操动机构。
背景技术
高压断路器液压操动机构的蓄能器大多采用充气式蓄能器，现有的蓄能器一般包括蓄能器筒体和导向移动装配在蓄能器筒体内的活塞，活塞将蓄能器筒体分隔为左、右两个腔室，分别为高压油腔和预充气腔。当对蓄能器进行储能时，在预充气腔充入气体，然后向高压油腔通入高压液压油，驱动蓄能器中的活塞向右方运动，压缩预充气腔内的预充入气体而储存能量；在断路器处于正常运行状态时，液压系统的额定油压即蓄能器内高压油腔的油压，由被压缩的预充入气体提供，并需要保持稳定。
蓄能器压缩预充入气体的压力通常在20～35MPa之间，该压力值直接关系着液压操动机构的正常动作，因此，需要经常检测预充入气体是否出现了泄漏，以保证液压操动机构和断路器的正常运行。对现有技术中蓄能器进行泄漏检测时，为保证电网运行安全和检测人员安全，必须使断路器退出运行，通过检查预充入气体压力值来判断预充入气体是否出现了泄漏，这样的检测方式一方面对气体泄漏的发现存在滞后性，另一方面会影响断路器的正常工作，检测不方便。
发明内容
本发明的目的是提供一种带气体泄漏报警装置的蓄能器，以解决现有技术中对气体泄漏的发现存在滞后性以及会影响断路器的工作的问题；同时，本发明还提供了一种使用该蓄能器的液压操动机构。
本发明中带气体泄漏报警装置的蓄能器采用的技术方案是：带气体泄漏报警装置的蓄能器，包括蓄能器筒体和设置在蓄能器筒体内的活塞，所述蓄能器筒体内具有由活塞分隔出的预充气腔，所述蓄能器靠近所述预充气腔的一端设有用于检测所述活塞的位移的活塞位移检测装置。
所述活塞位移检测装置包括固定在所述活塞上的触杆和设置在所述蓄能器筒体对应端的封堵结构上的磁接近开关，所述触杆悬伸在所述预充气腔中，所述磁接近开关包括导向移动装配在所述封堵结构上的磁钢和固定在所述封堵结构上的磁传感器，所述触杆具有用于顶压所述磁钢的顶压部。
所述顶压部是由触杆的悬伸端上设置的法兰形成。
所述触杆上设有外螺纹，所述活塞上设有对应的螺纹孔，所述触杆旋装在所述螺纹孔中并且触杆纹上设有用于调整所述触杆旋入螺纹孔中的深度的调节螺母。
所述封堵结构包括嵌设在蓄能器筒体端部的塞座，所述塞座的内侧端面上设有供磁钢导向移动插设的磁钢插孔，外侧端面上设有用于装配所述磁传感器的传感器安装孔，所述磁钢插孔和传感器安装孔均为盲孔且相互平行，所述蓄能器筒体上旋装有用于防止所述塞座脱出的端盖。
本发明中液压操动机构采用的技术方案是，液压操动机构，包括带气体泄漏报警装置的蓄能器，所述蓄能器包括蓄能器筒体和设置在蓄能器筒体内的活塞，所述蓄能器筒体内具有由活塞分隔出的预充气腔，所述蓄能器靠近所述预充气腔的一端设有用于检测所述活塞的位移的活塞位移检测装置。
所述活塞位移检测装置包括固定在所述活塞上的触杆和设置在所述蓄能器筒体对应端的封堵结构上的磁接近开关，所述触杆悬伸在所述预充气腔中，所述磁接近开关包括导向移动装配在所述封堵结构上的磁钢和固定在所述封堵结构上的磁传感器，所述触杆具有用于顶压所述磁钢的顶压部。
所述顶压部是由触杆的悬伸端上设置的法兰形成。
所述触杆上设有外螺纹，所述活塞上设有对应的螺纹孔，所述触杆旋装在所述螺纹孔中并且触杆纹上设有用于调整所述触杆旋入螺纹孔中的深度的调节螺母。
所述封堵结构包括嵌设在蓄能器筒体端部的塞座，所述塞座的内侧端面上设有供磁钢导向移动插设的磁钢插孔，外侧端面上设有用于装配所述磁传感器的传感器安装孔，所述磁钢插孔和传感器安装孔均为盲孔且相互平行，所述蓄能器筒体上旋装有用于防止所述塞座脱出的端盖。
本发明采用上述技术方案，带气体泄漏报警装置的蓄能器包括蓄能器筒体和设置在蓄能器筒体内的活塞，所述蓄能器筒体内具有由活塞分隔出的预充气腔，所述蓄能器靠近所述预充气腔的一端设有用于检测所述活塞的位移的活塞位移检测装置，由于预充气腔内气体泄漏后其内压力会降低，活塞将会产生相应移动，因此，通过活塞位移检测装置即可检测活塞的位置，从而及时获知气体泄漏状况，并可以设定报警位置，如果检测到活塞移动到了设定的报警位置，就说明预充气腔气体发生了泄漏已经需要检修，与现有技术相比，不需将断路器停止运行再检测气体压力，避免对断路器的正常工作产生影响。
附图说明
图1是本发明中带气体泄漏报警装置的蓄能器的一个实施例的结构示意图；
图2是图1中磁接近开关的安装结构的放大图。
图中各附图标记对应的名称为：1蓄能器筒体，2活塞，31高压油腔，32预充气腔，4触杆，41法兰，5调节螺母，61塞座，611磁钢插孔，612传感器安装孔，62端盖，71磁钢，72磁传感器，8限位帽，9压缩弹簧。
具体实施方式
本发明中带气体泄漏报警装置的蓄能器的一个实施例如图1～图2所示，包括轴向两端分别设有封堵结构的蓄能器筒体1和设置在蓄能器筒体1内的活塞2，活塞2将蓄能器筒体1分隔为左、右两个腔室，分别为高压油腔31和预充气腔32。蓄能器还包括用于检测所述活塞2的位移的活塞位移检测装置，该活塞位移检测装置包括固定在所述活塞2上的触杆4和设置在所述蓄能器筒体1右端的封堵结构上的磁接近开关。
所述触杆4包括设有外螺纹的螺纹端和设有法兰41的悬伸端，所述活塞2的右侧端面上设有与螺纹端对应的螺纹孔，所述触杆4的螺纹端旋装在所述螺纹孔中，悬伸端悬伸在预充气腔32内。触杆4上还设有用于调整所述触杆4旋入螺纹孔中的深度的调节螺母5，能够在触杆4调整好悬伸长度后将触杆4锁紧固定在活塞2上。
蓄能器筒体1左侧的封堵结构与现有技术相同，蓄能器筒体1右侧的封堵结构包括嵌设在蓄能器筒体1端部的塞座61和用于对塞座61进行轴向限位的端盖62。所述塞座61为阶梯状回转体结构，成“凸”字形。端盖62上设有阶梯通孔，阶梯通孔左侧的孔径较大并设有内螺纹，用于旋装固定到蓄能器筒体1的外螺纹上；阶梯通孔孔径变化的位置形成朝左的环形台阶面，用于对塞座61进行挡止限位。塞座61安装好以后，其朝外的右端面暴露在端盖62上的开孔中。所述磁接近开关为现有技术，包括磁钢71和磁传感器72，塞座61的左侧端面上设有供磁钢71导向插设的磁钢插孔611，右侧端面上设有用于装配所述磁传感器72的传感器安装孔612，所述磁钢插孔611和传感器安装孔612均为盲孔且相互平行。塞座61上还固定有用于限制磁钢71朝左的移动极限的限位帽8，限位帽8上设有供磁钢71穿出的穿孔，磁钢71上设有与限位帽8挡止配合的轴肩，轴肩与塞座61之间设有压缩弹簧9，用于使磁钢71复位。所述触杆4的悬伸端上设置的法兰41形成用于顶压所述磁钢71的顶压部，保证对磁钢71的有效触动。
当预充气腔32内的气体出现泄漏时，蓄能器内的活塞2向右移动，使压缩气体的压力与液压系统的额定油压保持一致。随着预充气腔32内的高压气体不断的泄漏，蓄能器内的活塞2逐渐向右移动，带动触杆4逐渐接近磁接近开关的磁钢71，并最终接触磁钢71并推动其向右移动。当预充气腔32内的高压气体泄漏程度到达预定报警点时，磁接近开关的 磁钢71移动到预定行程，触发磁接近开关的磁传感器72，磁传感器72的常开触点转换为常闭触点，发出蓄能器预充入气体泄漏报警信号，提示工作人员对该蓄能器进行检修。检修完成后，触杆4与磁钢71脱离，磁钢71在相应复位弹簧的作用下向左移动，并离开报警位置，磁传感器72的常闭触点重新转换为常开触点，磁接近开关的报警信号解除。采用上述带气体泄漏报警装置的蓄能器，能够在高压断路器正常运行的状态下，在线实时监测蓄能器内气体是否泄漏到预定程度，及时产生报警信号，使用方便，提高了操动系统和断路器的可靠性。
本发明中液压操动机构的一个实施例包括蓄能器和相应的传动机构，蓄能器即上述实施例中的带气体泄漏报警装置的蓄能器，传动机构的结构与现有技术相同，此处不再赘述。
在上述实施例中，活塞位移检测装置采用的是触杆4和磁接近开关，触杆4固定在活塞2上，磁接近开关设置在封堵结构上，在本发明的其他实施例中，磁接近开关也可以采用其他安装方式，例如直接将磁钢71固定在活塞2上，并将磁感应器固定到蓄能器筒体1外周面上或者封堵结构上，同样可以实现对活塞2位移的检测；而活塞位移检测装置也可以替换成其他形式，例如行程开关或者光电开关，只要能够实现对所述活塞2位移的检测即可。

Claims (10)

  1. 带气体泄漏报警装置的蓄能器，包括蓄能器筒体和设置在蓄能器筒体内的活塞，所述蓄能器筒体内具有由活塞分隔出的预充气腔，其特征在于：所述蓄能器靠近所述预充气腔的一端设有用于检测所述活塞的位移的活塞位移检测装置。
  2. 根据权利要求1所述的带气体泄漏报警装置的蓄能器，其特征在于：所述活塞位移检测装置包括固定在所述活塞上的触杆和设置在所述蓄能器筒体对应端的封堵结构上的磁接近开关，所述触杆悬伸在所述预充气腔中，所述磁接近开关包括导向移动装配在所述封堵结构上的磁钢和固定在所述封堵结构上的磁传感器，所述触杆具有用于顶压所述磁钢的顶压部。
  3. 根据权利要求2所述的带气体泄漏报警装置的蓄能器，其特征在于：所述顶压部是由触杆的悬伸端上设置的法兰形成。
  4. 根据权利要求2或3所述的带气体泄漏报警装置的蓄能器，其特征在于：所述触杆上设有外螺纹，所述活塞上设有对应的螺纹孔，所述触杆旋装在所述螺纹孔中并且触杆纹上设有用于调整所述触杆旋入螺纹孔中的深度的调节螺母。
  5. 根据权利要求2或3所述的带气体泄漏报警装置的蓄能器，其特征在于：所述封堵结构包括嵌设在蓄能器筒体端部的塞座，所述塞座的内侧端面上设有供磁钢导向移动插设的磁钢插孔，外侧端面上设有用于装配所述磁传感器的传感器安装孔，所述磁钢插孔和传感器安装孔均为盲孔且相互平行，所述蓄能器筒体上旋装有用于防止所述塞座脱出的端盖。
  6. 液压操动机构，包括带气体泄漏报警装置的蓄能器，所述蓄能器包括蓄能器筒体和设置在蓄能器筒体内的活塞，所述蓄能器筒体内具有由活塞分隔出的预充气腔，其特征在于：所述蓄能器靠近所述预充气腔的一端设有用于检测所述活塞的位移的活塞位移检测装置。
  7. 根据权利要求6所述的液压操动机构，其特征在于：所述活塞位移检测装置包括固定在所述活塞上的触杆和设置在所述蓄能器筒体对应端的封堵结构上的磁接近开关，所述触杆悬伸在所述预充气腔中，所述磁接近开关包括导向移动装配在所述封堵结构上的磁钢和固定在所述封堵结构上的磁传感器，所述触杆具有用于顶压所述磁钢的顶压部。
  8. 根据权利要求7所述的液压操动机构，其特征在于：所述顶压部是由触杆的悬伸端上设置的法兰形成。
  9. 根据权利要求7或8所述的液压操动机构，其特征在于：所述触杆上设有外螺纹，所述活塞上设有对应的螺纹孔，所述触杆旋装在所述螺纹孔中并且触杆纹上设有用于调整所述触杆旋入螺纹孔中的深度的调节螺母。
  10. 根据权利要求7或8所述的液压操动机构，其特征在于：所述封堵结构包括嵌设在蓄能器筒体端部的塞座，所述塞座的内侧端面上设有供磁钢导向移动插设的磁钢插孔，外侧端面上设有用于装配所述磁传感器的传感器安装孔，所述磁钢插孔和传感器安装孔均为盲孔且相互平行，所述蓄能器筒体上旋装有用于防止所述塞座脱出的端盖。
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