CN107061793B - Constant value decompression real-time sampling valve - Google Patents

Constant value decompression real-time sampling valve Download PDF

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CN107061793B
CN107061793B CN201710339273.2A CN201710339273A CN107061793B CN 107061793 B CN107061793 B CN 107061793B CN 201710339273 A CN201710339273 A CN 201710339273A CN 107061793 B CN107061793 B CN 107061793B
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valve
piston
upper body
valve core
sampling
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CN107061793A (en
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崔占琴
张安妮
韩莎莎
韩旭
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Xian Shiyou University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/044Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1223Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1226Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston the fluid circulating through the piston
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/10Devices for withdrawing samples in the liquid or fluent state

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Immunology (AREA)
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  • Sampling And Sample Adjustment (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

本发明提供了一种定值减压实时取样阀,主要由上体、下体和电磁开关阀组成,所述上体与下体通过螺纹连接,上体上设有进液口、出液口及控制液通道,上体内置有阀芯、弹簧、挡圈,阀芯装配于阀腔内,阀芯内装有弹簧,压靠在挡圈上;下体上设有取样口、控制液通道,安装有电磁开关阀、端盖,下体内置有活塞、推杆,活塞与推杆采用螺栓连接,置于活塞腔内;本发明有效地解决了固井系统水泥浆、钻井泥浆等实时取样现场操作不便的问题,且结构简单、安装方便、操作灵活,大大减小了工人的劳动强度。

Figure 201710339273

The invention provides a fixed-value decompression real-time sampling valve, which is mainly composed of an upper body, a lower body and an electromagnetic switch valve. The upper body and the lower body are connected by threads, and the upper body is provided with a liquid inlet, a liquid outlet and a control The upper body is equipped with a valve core, spring, and retaining ring. The valve core is assembled in the valve cavity. The valve core is equipped with a spring and pressed against the retaining ring. On-off valve, end cover, piston and push rod are built in the lower body, and the piston and push rod are connected by bolts and placed in the piston chamber; the invention effectively solves the problem of inconvenient on-site operation of real-time sampling of cement slurry and drilling mud in the cementing system , and the structure is simple, the installation is convenient, and the operation is flexible, which greatly reduces the labor intensity of workers.

Figure 201710339273

Description

一种定值减压实时取样阀A real-time sampling valve for fixed-value decompression

技术领域technical field

本发明涉及一种取样装置,具体涉及一种定值减压实时取样阀。The invention relates to a sampling device, in particular to a constant-value decompression real-time sampling valve.

背景技术Background technique

取样阀是用于获取管路或设备中介质样品的阀门,在很多需要经常对介质样品进行化学分析的场合,多会使用专门的取样阀。按照取样时的工作原理或性能不同,取样阀主要分为三个种类,包括双联开启阀、法兰夹片阀以及带保温夹套的取样阀,但它们不能有效地处理分子结构复杂、粘度大的流体,容易发生堵塞问题,并且不适应高压环境,安全性能不稳定,不能实现实时取样。Sampling valve is a valve used to obtain medium samples in pipelines or equipment. In many occasions where chemical analysis of medium samples is often required, special sampling valves are often used. According to the working principle or performance of sampling, sampling valves are mainly divided into three types, including double opening valves, flange clip valves and sampling valves with insulation jackets, but they cannot effectively deal with complex molecular structures, viscosity Large fluids are prone to clogging problems, and are not suitable for high-pressure environments. The safety performance is unstable, and real-time sampling cannot be realized.

发明内容Contents of the invention

为克服现有工具存在的问题,本发明的目的在于提供一种使用安装方便、安全可靠的定值减压实时取样阀,本发明结构简单,能实现实时取样、降低取样口压力。In order to overcome the problems existing in the existing tools, the object of the present invention is to provide a real-time sampling valve with fixed value decompression that is easy to use and install, safe and reliable. The present invention has a simple structure, can realize real-time sampling and reduce the pressure of the sampling port.

为达到上述目的,本发明采用如下技术方案:To achieve the above object, the present invention adopts the following technical solutions:

一种定值减压实时取样阀,包括上体,弹簧,阀芯,推杆,活塞,下体、电磁开关阀;A fixed-value decompression real-time sampling valve, including an upper body, a spring, a valve core, a push rod, a piston, a lower body, and an electromagnetic switch valve;

上体后端与下体通过螺纹连接,上体开设有用于装配阀芯的阀腔,上体前端开设与均与取样液体主管道连通的进液口A、出液口B和控制液通道D,进液口A、出液口B、控制液通道D均与上体的阀腔连通,阀腔中内置有阀芯、弹簧和挡圈,阀腔中设有凸台,阀芯通过弹簧、挡圈压靠在凸台上,阀芯的两边分别开设有与阀腔连通的流体通孔F,阀芯与上体间设有一个环形节流通道E,节流通道E入口与流体通孔F连通、出口设有节流口M;The rear end of the upper body and the lower body are connected by threads, the upper body is provided with a valve cavity for assembling the valve core, and the front end of the upper body is provided with a liquid inlet A, a liquid outlet B and a control liquid channel D that are connected to the main pipeline of the sampling liquid. The liquid inlet A, the liquid outlet B, and the control liquid channel D are all connected with the valve cavity of the upper body. The valve core, spring and retaining ring are built in the valve cavity. The ring is pressed against the boss, and the two sides of the valve core are respectively provided with a fluid through hole F communicating with the valve cavity. There is an annular throttling channel E between the valve core and the upper body, and the inlet of the throttling channel E is connected to the fluid through hole F The connection and the outlet are provided with a throttling port M;

下体中设有用于安装推杆和活塞的活塞腔,活塞通过推杆与阀芯连接,下体设有取样口C、控制液通道H,取样口C与活塞腔连通,阀芯压靠在下体形成的阀座上,实现活塞腔与上体中的节流口M通过阀芯连通或切断,控制液通道H将上体上的控制液通道D与活塞腔后方连通,上体上还设置有用于控制控制液通道H连通或切断的电磁开关阀,活塞上设有连通活塞腔前后两部分腔体的阻尼孔G,通过控制液通道H向活塞腔后方打压推动活塞向前移动,进而推动阀芯使节流口M和活塞腔连通,通过取样口C取样。The lower body is provided with a piston chamber for installing the push rod and the piston. The piston is connected to the valve core through the push rod. The lower body is provided with a sampling port C and a control fluid channel H. The sampling port C is connected to the piston chamber, and the valve core is pressed against the lower body to form a On the valve seat, the piston chamber and the throttle port M in the upper body are connected or cut off through the valve core, and the control liquid channel H communicates the control liquid channel D on the upper body with the rear of the piston chamber. An electromagnetic switch valve that controls the connection or cut-off of the control liquid channel H. The piston is provided with a damping hole G that connects the front and rear parts of the piston chamber. Through the control liquid channel H, it presses to the rear of the piston chamber to push the piston forward, and then pushes the valve core. Make the orifice M communicate with the piston cavity, and take samples through the sampling port C.

进一步,活塞与推杆采用螺栓连接,并通过O型密封圈密封后置于活塞腔内。Further, the piston and the push rod are connected by bolts, sealed by an O-ring and placed in the piston cavity.

进一步,下体后端向端头处旋接有端盖,端盖与下体之间设有密封圈。Further, an end cover is screwed from the rear end of the lower body to the end, and a sealing ring is provided between the end cover and the lower body.

进一步,进液口A处用法兰和取样液体主管道连接,出液口B用螺纹和主管道连接,取样口C用螺纹和取样管连接。Further, the liquid inlet A is connected to the main pipeline of the sampling liquid by a flange, the liquid outlet B is connected to the main pipeline by threads, and the sampling port C is connected to the sampling pipe by threads.

进一步,阀芯的顶端为锥形结构,压靠在下体形成的阀座上。Further, the top end of the valve core is a conical structure, which presses against the valve seat formed by the lower body.

进一步,电磁开关阀中锥阀锥度为10°~60°。Further, the taper of the cone valve in the electromagnetic switch valve is 10°-60°.

与现有技术相比,本发明具有以下有益的技术效果:Compared with the prior art, the present invention has the following beneficial technical effects:

本发明的定值减压实时取样阀,包括上体,弹簧,阀芯,推杆,活塞,下体、电磁开关阀;采用分段式结构,取样时,接通电磁开关阀,打开进入活塞腔的控制液通道,一部分高压液体从进液口流向上、下体内的控制液通道,进而流入活塞后方腔室,作用在活塞后端面上,同时通过活塞上的阻尼孔进入活塞前腔室,在活塞前后端面上形成节流压差,从而推动活塞向前移动,顶起阀芯,打开取样通道,则取样液体通过阀芯侧壁的通孔流向阀腔,经节流通道,节流口流出取样口,由于节流作用,取样口压力大大降低,一般设置为略大于大气压,从而实现定值减压实时取样。The fixed-value decompression real-time sampling valve of the present invention includes an upper body, a spring, a valve core, a push rod, a piston, a lower body, and an electromagnetic switch valve; it adopts a segmented structure, and when sampling, the electromagnetic switch valve is connected and opened to enter the piston cavity A part of the high-pressure liquid flows from the liquid inlet to the control liquid channel in the upper and lower body, and then flows into the rear chamber of the piston, acting on the rear end surface of the piston, and at the same time enters the front chamber of the piston through the damping hole on the piston. A throttling pressure difference is formed on the front and rear ends of the piston, thereby pushing the piston forward, jacking up the valve core, and opening the sampling channel, then the sampling liquid flows to the valve cavity through the through hole on the side wall of the valve core, and flows out through the throttle port. The sampling port, due to the throttling effect, the pressure of the sampling port is greatly reduced, and is generally set to be slightly higher than the atmospheric pressure, so as to realize real-time sampling at a constant value decompression.

当取样结束时,关闭电磁开关阀,活塞后腔室隔断高压流体,活塞前后腔室由于阻尼孔的连通,形成压力平衡,复位弹簧使阀芯复位,压靠在下体阀座上关闭取样口,与此同时,推动活塞向后移动。When the sampling is finished, close the electromagnetic switch valve, the chamber behind the piston cuts off the high-pressure fluid, and the front and rear chambers of the piston form a pressure balance due to the connection of the damping hole. The return spring resets the valve core and presses against the lower valve seat to close the sampling port. At the same time, push the piston to move backward.

本发明有效地解决了固井系统水泥浆、钻井泥浆等实时取样现场操作不便的问题,且结构简单、安装方便、操作灵活,能实现实时取样、降低取样口压力,大大减小了工人的劳动强度。The invention effectively solves the problem of inconvenient on-site operation of real-time sampling of cement slurry, drilling mud, etc. in the cementing system, and has simple structure, convenient installation and flexible operation, can realize real-time sampling, reduce the pressure of the sampling port, and greatly reduce the labor of workers strength.

上体与下体螺纹连接,避免了一体成型时内部沉积的杂质无法清除的问题,并能实现阀芯的安装和替换,使其装配和阀芯检修更换均非常方便快捷。The upper body and the lower body are threaded, which avoids the problem that the impurities deposited inside cannot be removed during integral molding, and enables the installation and replacement of the valve core, making its assembly and valve core maintenance and replacement very convenient and quick.

阀芯壁上设有流体通孔,与阀腔连通,使液体能顺利通过阀腔流向节流通道。The valve core wall is provided with a fluid through hole, which communicates with the valve cavity, so that the liquid can smoothly flow through the valve cavity to the throttling channel.

在活塞上设有阻尼孔,使活塞向前移动时产生节流压差,向后移动时实现活塞两端液体压力平衡作用。There is a damping hole on the piston, so that when the piston moves forward, a throttling pressure difference is generated, and when the piston moves backward, the liquid pressure at both ends of the piston is balanced.

阀芯与阀上体间设有一个环形节流通道,节流通道出口为一可设定开度的节流口,其尺寸可根据液体压力的不同而改变,活塞向前移动时,液体流向节流口,产生节流作用,使取样口压力略大于大气压,实现了定值减压的效果。There is an annular throttling passage between the valve core and the valve upper body, and the outlet of the throttling passage is a throttling port whose opening can be set, and its size can be changed according to the pressure of the liquid. When the piston moves forward, the liquid flows The throttling port produces a throttling effect, so that the pressure of the sampling port is slightly higher than the atmospheric pressure, realizing the effect of constant value decompression.

进一步地,阀芯的顶端为锥形结构,压靠在下体阀座上,能更好地隔断流向取样口的液体。Furthermore, the top end of the valve core has a conical structure, which presses against the valve seat of the lower body, which can better block the liquid flowing to the sampling port.

进一步地,电磁开关阀中锥阀锥度为10°~60°,使其横向减少流体作用力,上下运动自如。Furthermore, the taper of the cone valve in the electromagnetic switch valve is 10°-60°, so that it can reduce the force of fluid in the lateral direction and move freely up and down.

进一步地,推杆与活塞通过螺纹连接,且之间设有O型密封圈,使推杆与活塞连接方便,防止液体从缝隙间进入活塞腔,使得流体通道内外有足够的压差,对取样过程有促进作用。Further, the push rod and the piston are threadedly connected, and an O-ring is provided between them, so that the connection between the push rod and the piston is convenient, and the liquid is prevented from entering the piston chamber from the gap, so that there is sufficient pressure difference inside and outside the fluid channel, and the sampling The process is facilitated.

附图说明Description of drawings

附图1为本发明结构示意图Accompanying drawing 1 is a structural representation of the present invention

图中:上体1、挡圈2、弹簧3、阀芯4、推杆5、活塞6、O型密封圈7、下体8、端盖9、电磁开关阀10。Among the figure: upper body 1, retaining ring 2, spring 3, spool 4, push rod 5, piston 6, O-ring 7, lower body 8, end cap 9, electromagnetic switch valve 10.

具体实施方式Detailed ways

下面将结合实施例对本发明技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都应属于本发明保护的范围。The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

下面结合附图对本发明做详细说明。The present invention will be described in detail below in conjunction with the accompanying drawings.

如附图1所示,一种定值减压实时取样阀主要包括上体1、挡圈2、弹簧3、阀芯4、推杆5、活塞6、端盖9、电磁开关阀10。As shown in Figure 1, a real-time sampling valve for fixed-value decompression mainly includes an upper body 1, a retaining ring 2, a spring 3, a valve core 4, a push rod 5, a piston 6, an end cover 9, and an electromagnetic switch valve 10.

上体1与下体8螺纹连接,上体上设有进液口A、出液口B及控制液通道D,上体内置有阀芯4、弹簧3、挡圈2,阀芯装配于阀腔内,阀芯内装有弹簧,压靠在挡圈上,阀芯的两边分别设有流体通孔F,与阀腔连通;阀芯4与阀上体1间设有一个环形节流通道E,节流通道出口为一可设定开度的节流口M。下体上设有取样口C、控制液通道H,安装有电磁开关阀10、端盖9,下体内置有活塞6、推杆5,活塞与推杆通过设置O型密封圈7密封,采用螺栓连接,置于活塞腔内,可自由移动,活塞上设有一个或两个阻尼孔G,推杆5为旋转体,底部为圆面结构,下体上位于轴向端头处旋接有端盖9,端盖与下体之间设有密封圈。The upper body 1 and the lower body 8 are screwed together. The upper body is provided with a liquid inlet A, a liquid outlet B and a control liquid channel D. The upper body is equipped with a valve core 4, a spring 3, and a retaining ring 2. The valve core is assembled in the valve cavity. Inside, the spool is equipped with a spring, which presses against the retaining ring, and the two sides of the spool are respectively provided with fluid through holes F, which communicate with the valve cavity; there is an annular throttling passage E between the spool 4 and the valve upper body 1, The outlet of the throttling passage is a throttling port M whose opening degree can be set. The lower body is equipped with a sampling port C and a control fluid channel H, and is equipped with an electromagnetic switch valve 10 and an end cover 9. The lower body is equipped with a piston 6 and a push rod 5. The piston and the push rod are sealed by an O-ring 7 and connected by bolts. , placed in the piston cavity, free to move, one or two damping holes G are set on the piston, the push rod 5 is a rotating body, the bottom is a round surface structure, and the lower body is screwed with an end cover 9 at the end of the axial direction , There is a sealing ring between the end cover and the lower body.

进液口A处用法兰和主管道连接,出液口B用螺纹和主管道连接,取样口C用螺纹和取样管连接;上体1与下体8均为回转体,且之间通过螺纹连接。阀芯4的顶端为锥形结构,压靠在下体阀座上,电磁开关阀10中锥阀锥度为10°~60°。The liquid inlet A is connected to the main pipeline with a flange, the liquid outlet B is connected to the main pipeline with threads, and the sampling port C is connected to the sampling pipe with threads; the upper body 1 and the lower body 8 are both rotary bodies, and they are connected by threads . The top of the valve core 4 is a conical structure, which is pressed against the valve seat of the lower body. The taper of the cone valve in the electromagnetic switch valve 10 is 10° to 60°.

取样时,接通电磁开关阀10,打开进入活塞腔的控制液通道,一部分高压液体从进液口A流向上体1、下体8内的控制液通道D、H,进而流入活塞6后腔室,作用在活塞后端面上,同时通过活塞上的阻尼孔G进入活塞前腔室,在活塞前后端面上形成节流压差,从而推动活塞向前移动,顶起阀芯4,打开取样通道,则取样液体通过阀芯侧壁的通孔F流向阀腔,经节流通道E,节流口M流出取样口C,由于节流作用,取样口压力大大降低,一般设置为略大于大气压,从而实现定值减压实时取样。When sampling, turn on the electromagnetic switch valve 10, open the control liquid passage into the piston chamber, and a part of the high-pressure liquid flows from the liquid inlet A to the control liquid passages D and H in the upper body 1 and lower body 8, and then flows into the rear chamber of the piston 6 , acts on the rear end surface of the piston, and at the same time enters the front chamber of the piston through the damping hole G on the piston, forming a throttling pressure difference on the front and rear end surfaces of the piston, thereby pushing the piston forward, lifting the valve core 4, and opening the sampling channel. Then the sampling liquid flows to the valve chamber through the through hole F on the side wall of the valve core, and flows out of the sampling port C through the throttle channel E, and the throttle port M flows out of the sampling port C. Realize constant value decompression real-time sampling.

当取样结束时,关闭电磁开关阀10,活塞后腔室隔断高压流体,活塞前后腔室由于阻尼孔G的连通,形成压力平衡,复位弹簧3使阀芯4复位,压靠在下体阀座上关闭取样口,与此同时,推动活塞向后移动,同时,在下体8上位于后轴向端头处的端盖9,能实现推杆和活塞的安装和替换,使其装配和检修更换均非常方便快捷。When the sampling is finished, close the electromagnetic switch valve 10, the chamber behind the piston blocks the high-pressure fluid, and the front and rear chambers of the piston form a pressure balance due to the connection of the damping hole G. The return spring 3 resets the valve core 4 and presses it against the valve seat of the lower body. Close the sampling port, at the same time, push the piston to move backwards, and at the same time, the end cover 9 located at the end of the rear axial direction on the lower body 8 can realize the installation and replacement of the push rod and the piston, making it easy to assemble, repair and replace. Very convenient and fast.

以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施方式仅限于此,对于本发明所属技术领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干简单的推演或替换,都应当视为属于本发明由所提交的权利要求书确定专利保护范围。The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are limited thereto. Under the circumstances, some simple deduction or replacement can also be made, all of which should be regarded as belonging to the scope of patent protection determined by the submitted claims of the present invention.

Claims (4)

1.一种定值减压实时取样阀,其特征在于:包括上体(1)、弹簧(3)、阀芯(4)、推杆(5)、活塞(6)、下体(8)、电磁开关阀(10);1. A constant value decompression real-time sampling valve is characterized in that: comprise upper body (1), spring (3), spool (4), push rod (5), piston (6), lower body (8), Electromagnetic switch valve (10); 上体(1)后端与下体(8)通过螺纹连接,上体(1)中开设有用于装配阀芯(4)的阀腔,上体(1)前端设有均与取样液体主管道连通的进液口A、出液口B和控制液通道D,进液口A与阀腔连通,阀腔中内置有阀芯(4)、弹簧(3)和挡圈(2),阀腔中设有阀芯(4),阀芯(4)内部设有弹簧(3),阀芯(4)与进液口A之间设有挡圈(2),阀芯外侧两边分别开设有与阀腔连通的流体通孔F,阀芯(4)与上体(1)间还设有一个环形节流通道E,节流通道E入口与流体通孔F连通、出口设有节流口M;The rear end of the upper body (1) is connected to the lower body (8) through threads, the upper body (1) is provided with a valve cavity for assembling the valve core (4), and the front end of the upper body (1) is provided with a main pipe for sampling liquid. The liquid inlet A, liquid outlet B and control liquid channel D, the liquid inlet A is connected with the valve cavity, and the valve core (4), spring (3) and retaining ring (2) are built in the valve cavity, and the valve cavity A spool (4) is provided, and a spring (3) is provided inside the spool (4), and a retaining ring (2) is provided between the spool (4) and the liquid inlet A, and the valve core is provided on both sides of the outside of the valve core. The fluid through hole F connected with the cavity, an annular throttling passage E is also provided between the valve core (4) and the upper body (1), the inlet of the throttling passage E communicates with the fluid through hole F, and the outlet is provided with a throttling port M; 下体(8)中设有用于安装推杆(5)和活塞(6)的活塞腔,活塞(6)通过前方的推杆(5)与阀芯(4)连接,下体(8)设有取样口C、控制液通道H,取样口C与活塞腔连通,阀芯(4)压靠在下体形成的阀座上,实现活塞腔与上体(1)中的节流口M通过阀芯(4)连通或切断,控制液通道H将上体(1)上的控制液通道D与活塞(6)后方的活塞腔腔体连通,上体(1)上还设置有用于控制控制液通道H连通或切断的电磁开关阀(10),活塞(6)上设有连通活塞腔前后两部分腔体的阻尼孔G,通过控制液通道H向活塞腔后方打压推动活塞(6)向前移动,进而推动阀芯(4)使节流口M和活塞腔连通,通过取样口C取样;The lower body (8) is provided with a piston cavity for installing the push rod (5) and the piston (6), the piston (6) is connected to the valve core (4) through the front push rod (5), and the lower body (8) is provided with a sampling Port C, control liquid channel H, sampling port C communicates with the piston chamber, the valve core (4) is pressed against the valve seat formed by the lower body, and the piston chamber and the throttle port M in the upper body (1) pass through the valve core ( 4) Connect or cut off, the control liquid channel H communicates the control liquid channel D on the upper body (1) with the piston cavity behind the piston (6), and the upper body (1) is also provided with a control liquid channel H The electromagnetic switch valve (10) connected or cut off, the piston (6) is provided with a damping hole G connecting the front and rear parts of the piston chamber, and the piston (6) is moved forward by pressing the control liquid channel H to the rear of the piston chamber. Then push the spool (4) to make the throttle port M communicate with the piston chamber, and take samples through the sampling port C; 下体(8)后端向端头处旋接有端盖(9),端盖(9)与下体(8)之间设有密封圈;The rear end of the lower body (8) is screwed to the end with an end cover (9), and a sealing ring is provided between the end cover (9) and the lower body (8); 阀芯(4)的顶端为锥形结构,压靠在下体形成的阀座上。The top of the valve core (4) is a conical structure, which is pressed against the valve seat formed by the lower body. 2.根据权利要求1所述的定值减压实时取样阀,其特征在于:活塞与推杆采用螺栓连接,并通过O型密封圈(7)密封后置于活塞腔内。2. The constant-value decompression real-time sampling valve according to claim 1, characterized in that the piston and the push rod are connected by bolts, sealed by an O-ring (7) and placed in the piston cavity. 3.根据权利要求1所述的定值减压实时取样阀,其特征在于:进液口A处用法兰和取样液体主管道连接,出液口B用螺纹和主管道连接,取样口C用螺纹和取样管连接。3. The constant-value decompression real-time sampling valve according to claim 1, characterized in that: the liquid inlet A is connected with the main pipeline of the sampling liquid with a flange, the liquid outlet B is connected with the main pipeline with threads, and the sampling port C is connected with the main pipeline. Threaded and sample tube connections. 4.根据权利要求1所述的定值减压实时取样阀,其特征在于:电磁开关阀(10)中锥阀锥度为10°~60°。4. The constant-value decompression real-time sampling valve according to claim 1, characterized in that: the taper of the solenoid valve (10) is 10°-60°.
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