WO2020051965A1 - 一种可调截止方向的单向阀 - Google Patents

一种可调截止方向的单向阀 Download PDF

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Publication number
WO2020051965A1
WO2020051965A1 PCT/CN2018/109866 CN2018109866W WO2020051965A1 WO 2020051965 A1 WO2020051965 A1 WO 2020051965A1 CN 2018109866 W CN2018109866 W CN 2018109866W WO 2020051965 A1 WO2020051965 A1 WO 2020051965A1
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hole
valve core
connection hole
housing
valve
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PCT/CN2018/109866
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English (en)
French (fr)
Inventor
邱梅
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苏州丹顿机电有限公司
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Publication of WO2020051965A1 publication Critical patent/WO2020051965A1/zh

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    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • F16K15/066—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring with a plurality of valve members

Definitions

  • the invention relates to a one-way valve, in particular to a one-way valve with adjustable cut-off direction.
  • One-way valve is that the fluid can only flow along the water inlet, but the medium at the water outlet cannot return. It is commonly known as one-way valve.
  • Check valve is also called check valve or check valve. Used to prevent reverse flow of oil flow in hydraulic systems or to prevent reverse flow of compressed air in pneumatic systems. Check valves are available in straight and right angle versions.
  • the existing check valve can only allow the oil to flow in one direction, so that it remains open when the oil flows in a fixed direction, and remains off when the oil flows in the reverse direction, but in some cases, the oil needs to be reversed.
  • One-way flow that is, the oil flows from the original water outlet to the original water inlet in one direction.
  • An object of the present invention is to provide a non-return valve with adjustable cut-off direction, which can conveniently control the direction of preventing oil from flowing in the reverse of the above-mentioned defects in the prior art.
  • a check valve with adjustable cutoff direction which includes a first housing and a second housing connected to each other, and the first housing is provided with a first housing.
  • a through hole, the second housing is provided with a fourth connection hole communicating with the first through hole, and the one-way valve further comprises a first valve core slidingly mated with the first through hole and an extrusion
  • the first spring of the first valve core, the first valve core can seal the fourth connection hole, and is characterized in that the second housing is provided with a second through hole, and the first housing is provided with A second connection hole communicating with the second through hole, and the second connection hole and the fourth connection hole communicate with each other;
  • the one-way valve further includes:
  • a first tie rod connected to the first valve core, the first tie rod can be pulled out and fixed;
  • a second tie rod connected to the second valve core, the second tie rod can be pulled out and fixed.
  • the first housing is provided with a first protrusion
  • the first tie rod is provided with a first baffle which can abut against the first protrusion
  • the second housing is provided with a second protrusion
  • the second tie rod is provided with a second baffle plate that can abut against the second protrusion.
  • the first housing is provided with a first flow hole communicating with the first through hole and the second connection hole.
  • the second housing is provided with a second flow hole communicating with the second through hole and the fourth connection hole, and the second flow hole is matched with the first flow hole.
  • the first housing is further provided with a first check sleeve, and the first spring abuts between the first check sleeve and the first valve core.
  • the second housing is also provided with a second check sleeve, and the second spring abuts between the second check sleeve and the second valve core.
  • the first valve core is provided with a first blind hole, and the first spring is disposed in the first blind hole.
  • the second valve core is provided with a second blind hole, and the second spring is disposed in the second blind hole.
  • the first casing and the second casing are flange-connected.
  • the present invention has the advantage that the check valve of the adjustable cutoff direction of the present invention enables the check valve to conveniently control and prevent oil by changing the states of the first and second spools. In the reverse flow direction, it can also be completely turned on and off, with more diversified functions, simple and convenient operation, and high reliability.
  • FIG. 1 is a schematic structural diagram of a check valve in the present invention.
  • FIG. 2 is a right side view of the check valve in FIG. 1.
  • FIG. 3 is a left side view of the check valve in FIG. 1.
  • FIG. 4 is a schematic structural view of a one-way valve in the present invention after changing a flow limiting direction.
  • FIG. 5 is a right side view of the check valve in FIG. 4.
  • FIG. 6 is a left side view of the check valve in FIG. 4.
  • a non-return valve with an adjustable cutoff direction corresponding to a preferred embodiment of the present invention includes a first casing 10 and a second casing 50 connected to each other, and the first casing 10 and the first casing The two shells 50 are connected by a flange.
  • the first casing 10 and the second casing 50 are respectively provided with a matching first flange 11 and a second flange 51, and the first casing 10 and the second casing 50 are fastened together by bolts and nuts.
  • a first through hole 12 is formed on an end surface of the first case 10, and a first connection hole 13 and a second connection hole 14 are formed on the end surface of the other end.
  • the first case 10 is also provided with a first connection hole inside. 13 and the first through hole 15 of the first through hole 12, preferably, the first connecting hole 13 and the first through hole 15 are coaxially arranged; the second connecting hole 14 is in communication with the first through hole 12, and Used to connect external oil lines.
  • the structure of the second casing 50 is similar to that of the first casing 10, and a second through-hole 52 matching the first through-hole 12 is formed on an end surface of one end thereof, and a third connection hole 53 and The fourth connection hole 54 and a second through hole 55 communicating with the third connection hole 53 and the fourth connection hole 54 are also provided inside the second housing 50.
  • the third connection hole 53 and the second through hole 55 are coaxial.
  • the fourth connection hole 54 is in communication with the second through-hole 52 and is used to connect an external oil pipeline.
  • the second connection hole 14 is coaxial with the second through hole 55; the fourth connection hole 54 is coaxial with the first through hole 15.
  • the check valve of the present invention further includes a first spool 16, a first check sleeve 17, a first tie rod 18, and a first spring 19.
  • the first valve core 16 is slidably fitted in the first through hole 15.
  • the fitting relationship between the first valve core 16 and the first through hole 15 may refer to the fitting of the cylinder piston and the cylinder in the prior art. relationship.
  • the first spool 16 is provided with a first tapered surface 71 that can seal the fourth connection hole 54 at one end, and a first blind hole 70 is opened at the other end.
  • a first bottom surface 72 of the first blind hole 70 is also provided with the first The first screw hole 73 to which the tie rod 18 is screwed.
  • a first flow hole 75 is also provided in the radial direction of the first valve body 16 in fluid communication with the first and second through holes 12 and 52.
  • first tie rod 18 is screwed into the first screw hole 73, and the other end protrudes from the first connection hole 13.
  • a first baffle 20 is provided at the end protruding from the first connection hole 13.
  • a first bump 21 is provided thereon, and the first baffle 20 and the first bump 21 are set to be in a contact or non-contact state as required.
  • the width of the first baffle 20 is The dimensions in the direction are not the same as the dimensions in the length direction.
  • the surface of the first connection hole 13 is provided with threads.
  • the first backstop sleeve 17 is threadedly connected in the first connection hole 13.
  • the first tie rod 18 is threaded in the first backstop sleeve 17.
  • the first backstop sleeve 17 is provided with a first A support surface 74.
  • the first spring 19 is disposed in the first blind hole 70, and is sleeved on the first tie rod 18, and the two ends of the first spring 19 abut against the first support surface 74 and the first bottom surface 72, respectively.
  • the first spring 19 exerts a force in the direction of the fourth connection hole 54 on the first valve core 16; when the first baffle 20 is not supported by the first bump 21, the first valve core 16 abuts against and seals the fourth A connection hole 54; and when the first baffle 20 is supported by the first bump 21, the first valve core 16 is out of contact with the fourth connection hole 54.
  • the check valve of the present invention further includes a second valve core 56, a second check sleeve 57, a second tie rod 58, and a second spring 59.
  • the second valve core 56 is slidably fitted in the second through hole 55.
  • the fitting relationship between the second valve core 56 and the second through hole 55 can refer to the fitting of the cylinder piston and the cylinder in the prior art. relationship.
  • the second valve core 56 is provided at one end with a second tapered surface 81 that can seal the second connection hole 14, and the other end is provided with a second blind hole 80.
  • the second bottom surface 82 of the second blind hole 80 is also provided with a second The second screw hole 83 to which the tie rod 58 is screwed.
  • the second valve core 56 is further provided with a second flow hole 85 in fluid communication with the first and second through holes 12 and 52.
  • One end of the second tie rod 58 is screwed into the second screw hole 83, and the other end protrudes from the third connection hole 53.
  • a second baffle 60 is provided at the end protruding from the third connection hole 53.
  • a second projection 61 is provided on the top, and the second baffle 60 and the second projection 61 are set to be in a contact or non-contact state as required. As shown in FIG. 2 and FIG. The dimension in the direction is not the same as the dimension in the length direction. When the second baffle 60 is placed in the lateral direction, it does not contact the second protrusion 61, and when it is placed in the longitudinal direction, it is supported by the second protrusion 61.
  • the surface of the third connection hole 53 is provided with threads.
  • the second backstop sleeve 57 is threadedly connected in the third connection hole 53.
  • the second tie rod 58 is threaded in the second backstop sleeve 57.
  • the second backstop sleeve 57 is provided with a first ⁇ Supporting surface 84.
  • the second spring 59 is disposed in the second blind hole 80, and is sleeved on the second tie rod 58, and both ends of the second spring 59 abut against the second support surface 84 and the second bottom surface 82.
  • the second spring 59 exerts a force in the direction of the second through hole 55 on the second valve core 56; when the second baffle 60 is not supported by the second projection 61, the second valve core 56 abuts against and seals the second valve core 56 The connection hole 14; and when the second baffle 60 is supported by the second projection 61, the second valve core 56 is out of contact with the second connection hole 14.
  • first tie rod 18 When the first tie rod 18 needs to be supported by the first protrusion 21, it is only necessary to pull the first tie rod 18 outward to rotate the angle to make the first protrusion 21 support the first baffle 20, and then release the first tie rod 18. When removing the first tie rod 18 and the first projection 21 from the support, it is only necessary to pull the first tie rod 18 outward to rotate a certain angle to disengage the first projection 21 from the first baffle 20, and then release the first A pull rod 18 is sufficient.
  • the operation of the second tie rod 58 is similar to that of the first tie rod 18, and details are not described herein again.
  • the flow holes 12 and 52 flow out from the fourth connection hole 54; and if the oil flows in from the fourth connection hole 54, since the second spring 59 presses the second valve core 56 against the second connection hole 14, the pressure of the oil will be The second valve core 56 is further pressed against the second connection hole 14, so oil cannot flow into the second connection hole 14, that is, only oil is allowed to flow in from the fourth connection hole 54 and from the second connection hole 14 at this time. Outflow.
  • the first and second valve cores 10 and 50 are in an open state, and the entire valve body is in a fully conductive state at this time;
  • the first and second valve cores 10 and 50 are in contact with the fourth connection hole 54 and the second connection hole 14, respectively.
  • the entire valve body is completely In the cut-off state, the oil circuit is disconnected.
  • the check valve with adjustable cut-off direction of the present invention enables the check valve to conveniently control the direction of preventing oil from flowing in the reverse direction by changing the state of the first spool and the second spool, and can also achieve full conduction In the closed state, the functions are more diversified, and the operation is simple and convenient, and the reliability is high.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

一种可调截止方向的单向阀，包括相互连接的第一壳体（10）和第二壳体（50），第一壳体（10）开设有第一通孔（15），与第一通孔（15）滑动配接的第一阀芯（16）以及挤压第一阀芯（16）的第一弹簧（19），第二壳体（50）开设有第二通孔（55），第一壳体（10）开设有与第二通孔（55）连通的第二连接孔（14），第二壳体（50）开设有与第一通孔（15）连通的第四连接孔（54），第二连接孔（14）与第四连接孔（54）相互连通；与第二通孔（55）滑动配接的第二阀芯（56）以及挤压第二阀芯（56）的第二弹簧（59），第二阀芯（56）可密封第二连接孔（14），第一阀芯（16）可密封第四连接孔（54）；还包括与第一阀芯（16）相连的第一拉杆（18），第一拉杆（18）可向外拉出并固定；与第二阀芯（56）相连的第二拉杆（58），第二拉杆（58）可向外拉出并固定。该单向阀能方便地控制油液正向和反向流动。

Description

一种可调截止方向的单向阀 技术领域
本发明涉及单向阀，特别涉及一种可调截止方向的单向阀。
背景技术
单向阀是流体只能沿进水口流动，出水口介质却无法回流，俗称单向阀。单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动，或者用于气动系统中防止压缩空气逆向流动。单向阀有直通式和直角式两种。
现有的单向阀只能允许油液向一个方向流动，实现在油液在固定方向流动时保持开启，而油液反向流动时保持截止，但在有些情况下，需要油液反向进行单向流动，即油液由原出水口向原进水口单向流动，此时，则需要将单向阀反向安装，或者使用两个单向阀，拆装费时费力，而且油液容易流出，污染环境。
发明内容
本发明的目的在于针对现有技术中的上述缺陷，提供一种可调截止方向的单向阀，其能方便的控制防止油液反向流动的方向。
为实现上述发明目的，本发明采用了如下技术方案：一种可调截止方向的单向阀，其包括相互连接的第一壳体和第二壳体，所述第一壳体开设有第一通孔，所述第二壳体开设有与所述第一通孔连通的第四连接孔，所述单向阀还包括与所述第一通孔滑动配接的第一阀芯以及挤压所述第一阀芯的第一弹簧，所述第一阀芯可密封所述第四连接孔，其特征在于：所述第二壳体开设有第二通孔，所述第一壳体开设有与所述第二通孔连通的第二连接孔，所述第二连接孔与所述第四连接孔相互连通；
所述单向阀还包括：
与所述第一通孔滑动配接的第二阀芯以及挤压所述第一阀芯的第一弹簧，所述第二阀芯可密封所述第二连接孔；
与所述第一阀芯相连的第一拉杆，所述第一拉杆可向外拉出并固定；
与所述第二阀芯相连的第二拉杆，所述第二拉杆可向外拉出并固定。
此外，本发明还提出如下附属技术方案：
所述第一壳体设置有第一凸块，所述第一拉杆设置有可与所述第一凸块相抵的第一挡板。
所述第二壳体设置有第二凸块，所述第二拉杆设置有可与所述第二凸块相抵的第二挡板。
所述第一壳体开设有与所述第一通孔和所述第二连接孔相连通的第一流通孔。
所述第二壳体开设有与所述第二通孔和所述第四连接孔相连通的第二流通孔，所述第二流通孔与所述第一流通孔相配合。
所述第一壳体还设置有第一止退套，所述第一弹簧抵接在所述第一止退套和所述第一阀芯之间。
所述第二壳体还设置有第二止退套，所述第二弹簧抵接在所述第二止退套和所述第二阀芯之间。
所述第一阀芯开设有第一盲孔，所述第一弹簧设置于所述第一盲孔内。
所述第二阀芯开设有第二盲孔，所述第二弹簧设置于所述第二盲孔内。
所述第一壳体和所述第二壳体法兰连接。
相比于现有技术，本发明的优点在于：本发明的可调截止方向的单向阀通过改变第一阀芯和第二阀芯的状态，使得本单向阀能够方便的控制防止油液反向流动的方向，另外还可以达到完全导通和截止的状态，功能更为多样化，并且，操作简单方便，可靠性高。
附图说明
图1是本发明中单向阀的结构示意图。
图2是图1中单向阀的右视图。
图3是图1中单向阀的左视图。
图4是本发明中单向阀改变限流方向后的结构示意图。
图5是图4中单向阀的右视图。
图6是图4中单向阀的左视图。
具体实施方式
以下结合较佳实施例及其附图对本发明技术方案作进一步非限制性的详细说明。
如图1所示，对应于本发明一种较佳实施例的可调截止方向的单向阀，其包括相互连接的第一壳体10和第二壳体50，第一壳体10和第二壳体50通过法兰连接。第一壳体10和第二壳体50分别设置有相配的第一法兰盘11和第二法兰盘51，通过螺栓螺母将第一壳体10和第二壳体50紧固在一起。
第一壳体10一端的端面上开设有第一通流孔12，另一端端面上开设有第一 连接孔13和第二连接孔14，第一壳体10内部还开设有连通第一连接孔13和第一通流孔12的第一通孔15，优选的，第一连接孔13和第一通孔15同轴线设置；第二连接孔14与第一通流孔12相连通，其用于连接外部的油液管道。
第二壳体50的结构与第一壳体10类似，其一端的端面上开设有与第一通流孔12相配的第二通流孔52，另一端端面上开设有第三连接孔53和第四连接孔54，第二壳体50内部还开设有连通第三连接孔53和第四连接孔54的第二通孔55，优选的，第三连接孔53和第二通孔55同轴线设置；第四连接孔54与第二通流孔52相连通，其用于连接外部的油液管道。
优选的，当第一壳体10和第二壳体50相连接之后，第二连接孔14与第二通孔55同轴线；第四连接孔54与第一通孔15同轴线。
本发明的单向阀还包括第一阀芯16、第一止退套17、第一拉杆18和第一弹簧19。
其中，第一阀芯16滑动配接在第一通孔15内，在一种实施方式中，其与第一通孔15的配接关系可参考现有技术中油缸活塞与缸体的配接关系。第一阀芯16一端设置有可密封所述第四连接孔54的第一锥面71，另一端开设有第一盲孔70，第一盲孔70的第一底面72还开设有与第一拉杆18螺纹连接的第一螺孔73。在第一阀芯16径向还开设有与第一、第二通流孔12、52流体连通的第一流通孔75。
第一拉杆18一端螺接在第一螺孔73内，另一端伸出第一连接孔13，在伸出第一连接孔13的那端设置有第一挡板20，在第一壳体10上设置有第一凸块21，第一挡板20和第一凸块21被设置成可按需要调整到接触或不接触的状态，如图3和图6所示，第一挡板20宽度方向的尺寸与长度方向的尺寸不等，当第一挡板20横向放置时，不与第一凸块21接触，而在纵向放置时，其受到第一凸块21的支撑。
第一连接孔13表面设置有螺纹，第一止退套17螺纹连接在第一连接孔13内，第一拉杆18穿设在第一止退套17内，第一止退套17设置有第一支撑面74。
第一弹簧19设置在第一盲孔70内，其套设在第一拉杆18上，且两端分别与第一支撑面74和第一底面72相抵。第一弹簧19对第一阀芯16施加向第四连接孔54方向的力；当第一挡板20不受第一凸块21支撑时，第一阀芯16抵住并密封所述第四连接孔54；而当所述第一挡板20受到第一凸块21的支撑时，第一阀芯16与第四连接孔54脱离接触。
本发明的单向阀还包括第二阀芯56、第二止退套57、第二拉杆58和第二 弹簧59。
其中，第二阀芯56滑动配接在第二通孔55内，在一种实施方式中，其与第二通孔55的配接关系可参考现有技术中油缸活塞与缸体的配接关系。第二阀芯56一端设置有可密封所述第二连接孔14的第二锥面81，另一端开设有第二盲孔80，第二盲孔80的第二底面82还开设有与第二拉杆58螺纹连接的第二螺孔83。在第二阀芯56径向还开设有与第一、第二通流孔12、52流体连通的第二流通孔85。
第二拉杆58一端螺接在第二螺孔83内，另一端伸出第三连接孔53，在伸出第三连接孔53的那端设置有第二挡板60，在第二壳体50上设置有第二凸块61，第二挡板60和第二凸块61被设置成可按需要调整到接触或不接触的状态，如图2和图4所示，第二挡板60宽度方向的尺寸与长度方向的尺寸不等，当第二挡板60横向放置时，不与第二凸块61接触，而在纵向放置时，其受到第二凸块61的支撑。
第三连接孔53表面设置有螺纹，第二止退套57螺纹连接在第三连接孔53内，第二拉杆58穿设在第二止退套57内，第二止退套57设置有第二支撑面84。
第二弹簧59设置在第二盲孔80内，其套设在第二拉杆58上，且两端分别与第二支撑面84和第二底面82相抵。第二弹簧59对第二阀芯56施加向第二通孔55方向的力；当第二挡板60不受第二凸块61支撑时，第二阀芯56抵住并密封所述第二连接孔14；而当所述第二挡板60受到第二凸块61的支撑时，第二阀芯56与第二连接孔14脱离接触。
当需要将第一拉杆18由第一凸块21支撑时，只需向外拉出第一拉杆18旋转一定角度使第一凸块21撑住第一挡板20，然后放开第一拉杆18即可；使第一拉杆18和第一凸块21脱离支撑时，只需向外拉出第一拉杆18旋转一定角度，使第一凸块21与第一挡板20脱离，之后松开第一拉杆18即可。第二拉杆58的操作与第一拉杆18类似，此处不再赘述。
如图1所示，当第一挡板20不受第一凸块21的支撑，而第二挡板60受到第二凸块61的支撑时，第一阀芯16抵住第四连接孔54，而第二阀芯56与第二连接孔14脱离接触，此时，油液从第四连接孔54进入后，可推开第一阀芯16，并通过第一、第二通流孔12、52从第二连接孔14流出；而如果油液从第二连接孔14流入时，由于第一弹簧19压迫第一阀芯16抵住第四连接孔54，油液的压力会进一步使第一阀芯16紧压第四连接孔54，因此，油液将无法流入第四连接孔54，即，此时仅允许油液从第二连接孔14流入，从第四连接孔54流出。
相应的，如图4所示，当第一挡板20受到第一凸块21的支撑，而第二挡板60不受第二凸块61的支撑时，第一阀芯16与第四连接孔54脱离，而第二阀芯56与第二连接孔14抵紧，此时，油液从第二连接孔14进入后，可推开第二阀芯56，并通过第一、第二通流孔12、52从第四连接孔54流出；而如果油液从第四连接孔54流入时，由于第二弹簧59压迫第二阀芯56抵住第二连接孔14，油液的压力会进一步使第二阀芯56紧压第二连接孔14，因此，油液将无法流入第二连接孔14，即，此时仅允许油液从第四连接孔54流入，从第二连接孔14流出。
显而易见的，当第一挡板20和第二挡板60均受到支撑时，第一、第二阀芯10、50均处于打开状态，此时整个阀体处于完全导通的状态；而当第一挡板20和第二挡板60均未受到支撑时，第一、第二阀芯10、50分别与第四连接孔54和第二连接孔14抵接，此时，整个阀体处于完全截止的状态，即断开了油路。
本发明的可调截止方向的单向阀通过改变第一阀芯和第二阀芯的状态，使得本单向阀能够方便的控制防止油液反向流动的方向，另外还可以达到完全导通和截止的状态，功能更为多样化，并且，操作简单方便，可靠性高。
需要指出的是，上述较佳实施例仅为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (10)

  1. 一种可调截止方向的单向阀，其包括相互连接的第一壳体(10)和第二壳体(50)，所述第一壳体(10)开设有第一通孔(15)，所述第二壳体(50)开设有与所述第一通孔(15)连通的第四连接孔(54)，所述单向阀还包括与所述第一通孔(15)滑动配接的第一阀芯(16)以及挤压所述第一阀芯(16)的第一弹簧(19)，所述第一阀芯(16)可密封所述第四连接孔(54)，其特征在于：所述第二壳体(50)开设有第二通孔(55)，所述第一壳体(10)开设有与所述第二通孔(55)连通的第二连接孔(14)，所述第二连接孔(14)与所述第四连接孔(54)相互连通；
    所述单向阀还包括：
    与所述第二通孔(55)滑动配接的第二阀芯(56)以及挤压所述第二阀芯(56)的第二弹簧(59)，所述第二阀芯(56)可密封所述第二连接孔(14)；
    与所述第一阀芯(16)相连的第一拉杆(18)，所述第一拉杆(18)可向外拉出并固定；
    与所述第二阀芯(10)相连的第二拉杆(58)，所述第二拉杆(58)可向外拉出并固定。
  2. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第一壳体(10)设置有第一凸块(21)，所述第一拉杆(18)设置有可与所述第一凸块(21)相抵的第一挡板(20)。
  3. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第二壳体(50)设置有第二凸块(51)，所述第二拉杆(58)设置有可与所述第二凸块(51)相抵的第二挡板(60)。
  4. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第一壳体(10)开设有与所述第一通孔(15)和所述第二连接孔(14)相连通的第一流通孔(75)。
  5. 按照权利要求4所述可调截止方向的单向阀，其特征在于：所述第二壳体(50)开设有与所述第二通孔(55)和所述第四连接孔(54)相连通的第二流通孔(85)，所述第二流通孔(85)与所述第一流通孔(75)相配合。
  6. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第一壳体(10)还设置有第一止退套(17)，所述第一弹簧(19)抵接在所述第一止退 套(17)和所述第一阀芯(16)之间。
  7. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第二壳体(50)还设置有第二止退套(57)，所述第二弹簧(59)抵接在所述第二止退套(17)和所述第二阀芯(56)之间。
  8. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第一阀芯(16)开设有第一盲孔(70)，所述第一弹簧(19)设置于所述第一盲孔(70)内。
  9. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第二阀芯(56)开设有第二盲孔(80)，所述第二弹簧(59)设置于所述第二盲孔(80)内。
  10. 按照权利要求1所述可调截止方向的单向阀，其特征在于：所述第一壳体(10)和所述第二壳体(50)法兰连接。
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