WO2022016878A1 - 一种地暖系统分集水器用压差旁通装置 - Google Patents

一种地暖系统分集水器用压差旁通装置 Download PDF

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Publication number
WO2022016878A1
WO2022016878A1 PCT/CN2021/079437 CN2021079437W WO2022016878A1 WO 2022016878 A1 WO2022016878 A1 WO 2022016878A1 CN 2021079437 W CN2021079437 W CN 2021079437W WO 2022016878 A1 WO2022016878 A1 WO 2022016878A1
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Prior art keywords
valve
bypass
pipe
differential pressure
pipeline
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PCT/CN2021/079437
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English (en)
French (fr)
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杨洪伟
郑申龙
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浙江达柏林阀门有限公司
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Publication of WO2022016878A1 publication Critical patent/WO2022016878A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
    • F24D3/1066—Distributors for heating liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug

Definitions

  • the utility model belongs to the technical field of floor heating systems, and relates to a differential pressure bypass device for a sub-water collector of a floor heating system.
  • the existing balanced floor heating terminal system inlet and return water pressure difference generally adopts a bypass pipe between the inlet and return water pipes, and a bypass valve is installed on the bypass pipe, but the pressure setting of the bypass valve is different.
  • the manufacturers are different, and the bypass valve installed on the bypass pipe cannot be adjusted, so the pressure difference between the water distributor and the water collector in the floor heating system cannot be adjusted according to the actual situation, and the pressure difference of the whole system cannot be adjusted during operation. reach a state of equilibrium.
  • the purpose of the present invention is to solve the above problems by providing a differential pressure bypass device for the sub-collector of the floor heating system in view of the above problems existing in the prior art.
  • a differential pressure bypass device for a sub-collector of a floor heating system, characterized in that the differential pressure bypass device comprises a bypass pipe, and one end of the bypass pipe is provided with a A bypass valve connected to the water separator, and the bypass valve is provided with an adjustment handwheel that can adjust the pressure of its internal water flow, and the other end of the bypass pipe is provided with a tee connected to the water collector
  • the three-way ball valve is provided with a control handwheel that can adjust the size of its internal water flow and control the opening and closing of its internal water flow, and an exhaust valve is also provided on the bypass valve.
  • the bypass valve is composed of a bypass valve body, a bypass valve stem, a bypass valve core and a spring.
  • the bypass valve core and the spring are both arranged in the bypass valve body, the bypass valve core part extends into the bypass valve stem, the spring is sleeved on the bypass valve stem, and one end of the spring abuts against the bypass valve stem.
  • the other end of the bypass valve stem is against the bypass valve core.
  • the outer end of the bypass valve stem extends into the regulating handwheel and is fixedly connected with the regulating handwheel.
  • the bypass valve body also has a pipeline. 1.
  • Pipeline 2 and Pipeline 3 the first pipe is connected with the water separator, the second pipe is connected with one end of the bypass pipe, the third pipe is connected with the exhaust valve, and the handwheel is adjusted by controlling The bypass valve stem is moved axially along the bypass valve core to adjust the water flow pressure inside the bypass valve.
  • the three-way ball valve is composed of a three-way valve body, a valve ball and a valve seat, the valve seat is connected to the three-way valve body, and the three-way valve body is connected to the three-way valve body.
  • the valve ball is arranged in the three-way valve body and is limited by the valve seat.
  • the control handwheel and the valve ball are connected by a fixed valve stem, and the control handwheel drives the ball valve to rotate through the fixed valve stem to adjust the three-way valve.
  • the size of the water flow inside the ball valve and the opening and closing of the water flow inside the three-way ball valve are controlled.
  • the three-way valve body also has a pipeline four, a pipeline five and a pipeline six, and the pipeline four is connected with the water collector.
  • the fifth pipe is connected with the other end of the bypass pipe, and the valve ball is installed in the sixth pipe.
  • a telescopic rod is arranged in the third pipe and at the connection with the exhaust valve, and the outer casing of the telescopic rod is provided with a return spring, and the exhaust valve is provided with a return spring.
  • the air valve includes an exhaust valve body, the exhaust valve body and the third pipe are fixedly connected by a locking nut, and both sides of the telescopic rod are protruded and extended with extension parts. The top end of the part abuts on the exhaust valve body, one end of the return spring abuts on the bottom end of the extension part, and the other end abuts on the locking nut.
  • the bypass pipe is S-shaped.
  • the differential pressure bypass device for the sub-catchment of the local heating system uses the control handwheel and the adjusting handwheel to flexibly adjust according to the actual pressure differential demand, so that the entire floor heating system reaches a balanced state, and the water flow is stable at the same time. No noise is produced.
  • FIG. 1 is a schematic structural diagram of a floor heating system in a differential pressure bypass device for a sub-catchment of a local heating system.
  • FIG. 2 is a partial cross-sectional structural schematic diagram of the differential pressure bypass device for the sub-catchment of the local heating system.
  • FIG. 3 is a partial cross-sectional structural schematic diagram of the differential pressure bypass device for the sub-catchment of the local heating system.
  • FIG. 4 is a partial cross-sectional structural schematic diagram of a differential pressure bypass device for a sub-catchment of a local heating system.
  • the differential pressure bypass device for the sub-collector of the local heating system
  • the differential pressure bypass device includes a bypass pipe 3, the bypass pipe 3 is S-shaped, and the bypass pipe 3.
  • One end is provided with a bypass valve connected to the water separator 1, and the bypass valve is provided with an adjusting handwheel 4 that can adjust the pressure of its internal water flow, and the other end of the bypass pipe 3 is provided with a water collector.
  • 2-phase connected three-way ball valve, and the three-way ball valve is provided with a control handwheel 5 that can adjust the size of its internal water flow and control the opening and closing of its internal water flow
  • the bypass valve is also provided with an exhaust valve 6.
  • the exhaust valve 6. It is beneficial to exhaust the water flowing through the check valve, reduce the air bubble content in the water flowing out of the check valve, and improve the smoothness of the water flow.
  • the bypass valve is composed of a bypass valve body 7, a bypass valve stem 8, a bypass valve core 9 and a spring 10.
  • the bypass valve stem 8, the bypass valve core 9 and the spring 10 are all arranged in the bypass valve.
  • the bypass valve core 9 partially extends into the bypass valve stem 8
  • the spring 10 is sleeved on the bypass valve stem 8
  • one end of the spring 10 abuts on the bypass valve stem 8
  • the other end abuts on the bypass valve stem 8.
  • the outer end of the bypass valve rod 8 extends into the adjusting handwheel 4 and is fixedly connected with the adjusting handwheel 4.
  • the bypass valve body 7 also has a pipeline one 11, a pipeline two 12 and a pipeline three 13.
  • the first pipe 11 is connected with the water separator 1
  • the second pipe 12 is connected with one end of the bypass pipe 3
  • the third pipe 13 is connected with the exhaust valve 6, and the bypass valve stem 8 is bypassed along the bypass by controlling the adjustment handwheel 4
  • the valve core 9 moves axially to adjust the pressure of the water flow inside the bypass valve.
  • the adjusting handwheel 4 is arranged opposite to the pipe one 11, the pipe two 12 is opposite to the pipe three 13, and the central axis of the pipe one 11 is opposite to the middle axis of the pipe two 12. The axes are perpendicular to each other.
  • the three-way ball valve is composed of a three-way valve body 14, a valve ball 15 and a valve seat 16.
  • the valve seat 16 is connected to the three-way valve body 14, and the valve ball 15 is arranged in the three-way valve body 14 and passes through the valve seat. 16 to limit it, the control handwheel 5 and the valve ball 15 are connected by a fixed valve stem 17, and the control handwheel 5 drives the ball valve to rotate through the fixed valve stem 17 to adjust the water flow inside the three-way ball valve and control the three-way valve.
  • the water flow inside the ball valve is opened and closed.
  • the three-way valve body 14 also has a pipeline four 18, a pipeline five 19 and a pipeline six 20.
  • the pipeline four 18 is connected with the water collector 2, and the pipeline five 19 is connected with the other end of the bypass pipe 3. Connection, the valve ball 15 is installed in the pipeline six 20, the pipeline five 19 and the pipeline six 20 are arranged oppositely, the central axis of the pipeline four 18 and the central axis of the pipeline five 19 are perpendicular to each other.
  • a telescopic rod 21 is provided in the pipe 3 13 and at the connection with the exhaust valve 6, the telescopic rod 21 is in the shape of a rectangular body, and the outer sleeve of the telescopic rod 21 is provided with a return spring 22, and the exhaust valve 6 includes an exhaust valve.
  • the body 23, the exhaust valve body 23 and the pipe 3 13 are fixedly connected by the locking nut 24, the two sides of the telescopic rod 21 are protruding outwardly with extension parts 25, and the top of the extension part 25 abuts against the exhaust valve body 23, one end of the return spring 22 is against the bottom end of the extension part 25, and the other end is against the locking nut 24, the telescopic rod 21 is limited by the return spring 22, and the setting of the telescopic rod 21 can buffer the flowing gas .
  • the water collector 2 When the temperature in the local heating system reaches a certain value, the water collector 2 will automatically cut off the pipeline connected to the water distributor 1. In this case, the pressure difference of the water distributor 2 will change. Therefore, by adjusting the control handwheel 5 and the adjusting handwheel 4 to control the pressure difference between the sub-water collectors 2, so that the excess gas is released from the water separator 1 and flows back to the water collector 2 through the pressure differential bypass device to form a cycle.
  • the pressure difference between the water separator 1 and the water collector 2 can be balanced, so that the whole system can reach a balanced state.
  • Different pressure values are also engraved on the bypass valve near the adjustment handwheel 4. Adjust the adjustment handwheel 4 to the corresponding pressure value according to the actual demand, so that the pressure difference between the water separator 1 and the water collector 2 be balanced.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

一种地暖系统分集水器用压差旁通装置，压差旁通装置包括旁通管（3），旁通管（3）一端设置有与分水器（1）相连接的旁通阀，且旁通阀上设有可调节其内部水流压力大小的调节手轮（4），旁通管（3）的另一端设置有与集水器（2）相连接的三通球阀，且三通球阀上设有可调节其内部水流大小及控制其内部水流开闭的控制手轮（5），旁通阀上还设置有排气阀（6），压差旁通装置能够根据实际的压差需求进行灵活调节，使整个地暖系统达到平衡状态并且内部水流流动稳定，不会产生噪音。

Description

一种地暖系统分集水器用压差旁通装置 技术领域
本实用新型属于地暖系统技术领域，涉及一种地暖系统分集水器用压差旁通装置。
背景技术
现地暖系统中当到达一定温度时，集水器会自动断掉与分水器相连接的管路，这样就会造成分集水器的压差变化，导致水流流动不稳定产生噪音。
另外，现有平衡地暖末端系统进、回水压差一般采用在进、回水管之间增加一根旁通管，旁通管上安装了旁通阀，但是该旁通阀的压力设定各厂商都不同，安装在旁通管上的旁通阀也无法调节，导致地暖系统中分水器与集水器之间的压差无法根据实际情况调节，整个系统在运行过程中其压差无法达到平衡的状态。
发明内容
本实用新型的目的是针对现有技术中存在的上述问题，提供了一种地暖系统分集水器用压差旁通装置，来解决以上问题。
本实用新型的目的可通过下列技术方案来实现：一种地暖系统分集水器用压差旁通装置，其特征在于，该压差旁通装置包括旁通管，所述的旁通管一端设置有与分水器相连接的旁通阀，且该旁通阀上设有可调节其内部水流压力大小的调节手轮，所述旁通管的另一端设置有与集水器相连接的三通球阀，且该三通球阀上设有可调节其内部水流大小及控制其内部水流开闭的控制手轮，所述旁通阀上还设置有排气阀。
在上述的一种地暖系统分集水器用压差旁通装置，所述的旁通阀由旁通阀体、旁通阀杆、旁通阀芯和弹簧组成，所述的旁通阀杆、旁通阀芯和弹簧均设置于旁通阀体内，所述的旁通阀芯部分伸入旁通阀杆内，所述的弹簧套设于旁通阀杆，且该弹簧的一端抵靠于旁通阀杆上，另一端抵靠于旁通阀芯上，所述的旁通阀杆外端延伸至调节手轮内并与调节手轮固定连接，所述的旁通阀体上还具有管道一、管道二和管道三，所述的管道一与分水器相连接，所述的管道二与旁通管一端相连接，所述的管道三与排气阀相连接，通过控制调节手轮使旁通阀杆沿旁通阀芯轴向移动从而调节旁通阀内部水流压力的大小。
在上述的一种地暖系统分集水器用压差旁通装置，所述的三通球阀由三通阀体、阀球和阀座组成，所述的阀座连接于三通阀体内，所述的阀球设置于三通阀体内且通过阀座将其限位，所述的控制手轮与阀球之间通过固定阀杆相连，且该控制手轮通过该固定阀杆带动球阀转动从而调节三通球阀内部的水流大小以及控制三通球阀内部的水流开闭，所述的三通 阀体上还具有管道四、管道五和管道六，所述的管道四与集水器相连接，所述的管道五与旁通管另一端相连接，所述的阀球安装于管道六内。
在上述的一种地暖系统分集水器用压差旁通装置，所述的管道三内且与排气阀的连接处设置有伸缩杆，所述的伸缩杆外套设有复位弹簧，所述的排气阀包括有排气阀体，所述的排气阀体与管道三之间通过锁紧螺帽固定连接，所述的伸缩杆两侧均向外凸起延伸有延伸部，所述的延伸部顶端抵靠于排气阀体上，所述的复位弹簧一端抵靠于延伸部底端，另一端抵靠于锁紧螺帽上。
在上述的一种地暖系统分集水器用压差旁通装置，所述的旁通管呈S形。
与现有技术相比，本地暖系统分集水器用压差旁通装置利用控制手轮和调节手轮来根据实际的压差需求进行灵活调节，使整个地暖系统达到平衡状态，同时水流流动稳定，不会产生噪音。
附图说明
图1是本地暖系统分集水器用压差旁通装置中地暖系统的结构示意图。
图2是本地暖系统分集水器用压差旁通装置中的部分剖视结构示意图。
图3是本地暖系统分集水器用压差旁通装置中的部分剖视结构示意图。
图4是本地暖系统分集水器用压差旁通装置中的部分剖视结构示意图。
图中，1、分水器；2、集水器；3、旁通管；4、调节手轮；5、控制手轮；6、排气阀；7、旁通阀体；8、旁通阀杆；9、旁通阀芯；10、弹簧；11、管道一；12、管道二；13、管道三；14、三通阀体；15、阀球；16、阀座；17、固定阀杆；18、管道四；19、管道五；20、管道六；21、伸缩杆；22、复位弹簧；23、排气阀体；24、锁紧螺帽；25、延伸部。
具体实施方式
以下是本实用新型的具体实施例并结合附图，对本实用新型的技术方案作进一步的描述，但本实用新型并不限于这些实施例。
如图1、图2、图3、图4所示，本地暖系统分集水器用压差旁通装置，该压差旁通装置包括旁通管3，旁通管3呈S形,旁通管3一端设置有与分水器1相连接的旁通阀，且该旁通阀上设有可调节其内部水流压力大小的调节手轮4，旁通管3的另一端设置有与集水器2相连接的三通球阀，且该三通球阀上设有可调节其内部水流大小及控制其内部水流开闭的控制手轮5，旁通阀上还设置有排气阀6，排气阀6有利于对流经止回阀内的水流进行排气处理，减小止回阀内流出的水流中气泡含量，从而提高水流通畅度。
进一步细说，旁通阀由旁通阀体7、旁通阀杆8、旁通阀芯9和弹簧10组成，旁通阀杆8、旁通阀芯9和弹簧10均设置于旁通阀体7内，旁通阀芯9部分伸入旁通阀杆8内，弹簧10套设于旁通阀杆8，且该弹簧10的一端抵靠于旁通阀杆8上，另一端抵靠于旁通阀芯9上，旁通阀杆8外端延伸至调节手轮4内并与调节手轮4固定连接，旁通阀体7上还具有管道一11、管道二12和管道三13，管道一11与分水器1相连接，管道二12与旁通管3一端相连接，管道三13与排气阀6相连接，通过控制调节手轮4使旁通阀杆8沿旁通阀芯9轴向移动从而调节旁通阀内部水流压力的大小,调节手轮4与管道一11相对设置，管道二12与管道三13相对设置，管道一11的中轴线与管道二12的中轴线相互垂直。
进一步细说，三通球阀由三通阀体14、阀球15和阀座16组成，阀座16连接于三通阀体14内，阀球15设置于三通阀体14内且通过阀座16将其限位，控制手轮5与阀球15之间通过固定阀杆17相连，且该控制手轮5通过该固定阀杆17带动球阀转动从而调节三通球阀内部的水流大小以及控制三通球阀内部的水流开闭，三通阀体14上还具有管道四18、管道五19和管道六20，管道四18与集水器2相连接，管道五19与旁通管3另一端相连接，阀球15安装于管道六20内,管道五19和管道六20为相对设置，管道四18的中轴线与管道五19的中轴线相互垂直。
进一步细说，管道三13内且与排气阀6的连接处设置有伸缩杆21，伸缩杆21呈矩形体状，伸缩杆21外套设有复位弹簧22，排气阀6包括有排气阀体23，排气阀体23与管道三13之间通过锁紧螺帽24固定连接，伸缩杆21两侧均向外凸起延伸有延伸部25，延伸部25顶端抵靠于排气阀体23上，复位弹簧22一端抵靠于延伸部25底端，另一端抵靠于锁紧螺帽24上,通过复位弹簧22将伸缩杆21限位，伸缩杆21的设置使流动的气体得到缓冲。
当地暖系统中的温度到达一定数值时，集水器2自动断掉与分水器1相连接的管路，在该情况下会造成分集水器2的压差变化，因此通过调节控制手轮5和调节手轮4来控制分集水器2之间的压差，使多余的气体从分水器1内放出流经本压差旁通装置回至集水器2内形成一个循环，这样就能使分水器1和集水器2之间的压差得以均衡，使整个系统达到平衡的状态。
旁通阀上靠近调节手轮4的位置处还刻有不同的压力数值，根据实际需求将调节手轮4调节至相应的压力数值，使分水器1和集水器2之间的压差得以均衡。
本文中所描述的具体实施例仅仅是对本实用新型精神作举例说明。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式 替代，但并不会偏离本实用新型的精神或者超越所附权利要求书所定义的范围。

Claims (5)

  1. 一种地暖系统分集水器用压差旁通装置，其特征在于，该压差旁通装置包括旁通管(3)，所述的旁通管(3)一端设置有与分水器(1)相连接的旁通阀，且该旁通阀上设有可调节其内部水流压力大小的调节手轮(4)，所述旁通管(3)的另一端设置有与集水器(2)相连接的三通球阀，且该三通球阀上设有可调节其内部水流大小及控制其内部水流开闭的控制手轮(5)，所述旁通阀上还设置有排气阀(6)。
  2. 根据权利要求1所述的一种地暖系统分集水器用压差旁通装置，其特征在于，所述的旁通阀由旁通阀体(7)、旁通阀杆(8)、旁通阀芯(9)和弹簧(10)组成，所述的旁通阀杆(8)、旁通阀芯(9)和弹簧(10)均设置于旁通阀体(7)内，所述的旁通阀芯(9)部分伸入旁通阀杆(8)内，所述的弹簧(10)套设于旁通阀杆(8)，且该弹簧(10)的一端抵靠于旁通阀杆(8)上，另一端抵靠于旁通阀芯(9)上，所述的旁通阀杆(8)外端延伸至调节手轮(4)内并与调节手轮(4)固定连接，所述的旁通阀体(7)上还具有管道一(11)、管道二(12)和管道三(13)，所述的管道一(11)与分水器(1)相连接，所述的管道二(12)与旁通管(3)一端相连接，所述的管道三(13)与排气阀(6)相连接，通过控制调节手轮(4)使旁通阀杆(8)沿旁通阀芯(9)轴向移动从而调节旁通阀内部水流压力的大小。
  3. 根据权利要求1所述的一种地暖系统分集水器用压差旁通装置，其特征在于，所述的三通球阀由三通阀体(14)、阀球(15)和阀座(16)组成，所述的阀座(16)连接于三通阀体(14)内，所述的阀球(15)设置于三通阀体(14)内且通过阀座(16)将其限位，所述的控制手轮(5)与阀球(15)之间通过固定阀杆(17)相连，且该控制手轮(5)通过该固定阀杆(17)带动球阀转动从而调节三通球阀内部的水流大小以及控制三通球阀内部的水流开闭，所述的三通阀体(14)上还具有管道四(18)、管道五(19)和管道六(20)，所述的管道四(18)与集水器(2)相连接，所述的管道五(19)与旁通管(3)另一端相连接，所述的阀球(15)安装于管道六(20)内。
  4. 根据权利要求2所述的一种地暖系统分集水器用压差旁通装置，其特征在于，所述的管道三(13)内且与排气阀(6)的连接处设置有伸缩杆(21)，所述的伸缩杆(21)外套设有复位弹簧(22)，所述的排气阀(6)包括有排气阀体(23)，所述的排气阀体(23)与管道三(13)之间通过锁紧螺帽(24)固定连接，所述的伸缩杆(21)两侧均向外凸起延伸有延伸部(25)，所述的延伸部(25)顶端抵靠于排气阀体(23)上，所述的复位弹簧(22)一端抵靠于延伸部(25)底端，另一端抵靠于锁紧螺帽(24)上。
  5. 根据权利要求1所述的一种地暖系统分集水器用压差旁通装置，其特征在于，所述的旁 通管(3)呈S形。
PCT/CN2021/079437 2020-07-21 2021-03-06 一种地暖系统分集水器用压差旁通装置 WO2022016878A1 (zh)

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