WO2018152947A1 - Pneumatic fluorine-lined corrugated pipe single-seat regulating valve - Google Patents

Pneumatic fluorine-lined corrugated pipe single-seat regulating valve Download PDF

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Publication number
WO2018152947A1
WO2018152947A1 PCT/CN2017/081190 CN2017081190W WO2018152947A1 WO 2018152947 A1 WO2018152947 A1 WO 2018152947A1 CN 2017081190 W CN2017081190 W CN 2017081190W WO 2018152947 A1 WO2018152947 A1 WO 2018152947A1
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Prior art keywords
valve
valve body
cover
disposed
pneumatic
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PCT/CN2017/081190
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French (fr)
Chinese (zh)
Inventor
毛春龙
毛金根
陈善俊
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江苏金晟元特种阀门股份有限公司
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Priority to CN201710102595.5A priority Critical patent/CN106641293A/en
Priority to CN201710102595.5 priority
Application filed by 江苏金晟元特种阀门股份有限公司 filed Critical 江苏金晟元特种阀门股份有限公司
Publication of WO2018152947A1 publication Critical patent/WO2018152947A1/en

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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
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • 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
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • 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
    • F16K31/126Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • 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
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • 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
    • F16K41/00Spindle sealings
    • F16K41/10Spindle sealings with diaphragm, e.g. shaped as bellows or tube

Abstract

Disclosed is a pneumatic fluorine-lined corrugated pipe single-seat regulating valve, comprising a valve body (1), a valve cover (2), a valve rod (3), and a valve core (4), wherein the valve body (1) is further provided with a mounting connection port (7), the mounting connection port (7) being provided with a middle flange (9); a middle section of a water passage between an inlet and outlet (5, 6) of the valve body (1) is provided with a sealing end face (10) cooperating with the valve core (4); the valve core (4) is fixed to one end of the valve rod (3), and the valve core (4) is provided inside the valve body (1); the mounting connection port (7) is connected to the valve cover (2) via the middle flange (9), and a filler sealing mechanism (11) is arranged between the valve cover (2) and the upper part of the valve rod (3); a polytetrafluoroethylene corrugated pipe (13) is arranged on the valve rod (3) inside the valve body (1), and two ends of the polytetrafluoroethylene corrugated pipe (13) respectively bear against an inner end face of the valve cover (2) and an end face of the valve core (4); and a pneumatic actuator (36) is fixedly connected, via a bracket (35), to an upper end of the valve body (1), and an output end of the pneumatic actuator (36) is fixedly connected to a top end of the valve rod (3). The polytetrafluoroethylene corrugated pipe is used as a first seal to protect a medium from leaking at the valve rod. The valve being controlled to be opened or closed by the pneumatic actuator makes the strokes thereof accurate, safe and reliable.

Description

气动衬氟波纹管单座调节阀Pneumatic lining fluorine bellows single seat control valve 技术领域Technical field
本发明涉及一种特种阀门,特别涉及一种氯气用调节阀的制造技术领域。The invention relates to a special valve, in particular to a technical field of manufacturing a regulating valve for chlorine gas.
背景技术Background technique
目前,国内使用在含水量高的氯气管路上的阀门,是传统的氟塑料全衬截止阀,该类阀门结构陈旧,为普通平面型,一般为普通碳钢衬里,有的甚至是铸铁衬里,其产品使用性能不能满足工况实际运行的安全要求,经常泄漏,壳体易穿孔,使得化工企业特别是氯碱化工企业,该系统阀门经常需要维护和更换,给企业生产带来极大影响。At present, domestically used valves on chlorine pipelines with high water content are traditional fluoroplastic full-line shut-off valves. These valves are old-fashioned, ordinary flat type, generally plain carbon steel lining, and some even cast iron lining. The service performance of the product can not meet the safety requirements of the actual operation of the working condition, and often leaks, the shell is easy to perforate, making the chemical industry, especially the chlor-alkali chemical enterprise, the valve of the system often needs maintenance and replacement, which has great impact on the production of the enterprise.
发明内容Summary of the invention
为了克服现有技术的缺陷,本发明提供一种气动衬氟波纹管单座调节阀。In order to overcome the deficiencies of the prior art, the present invention provides a pneumatic lining fluorine bellows single seat regulating valve.
本发明包括阀体、阀盖、阀杆、阀芯,所述阀体包括进口、出口,所述阀体还设有安装连接口,所述进、出口分别设置接口法兰,所述安装连接口设置中法兰,所述阀体进、出口之间的水道中段设置有与阀芯配合的密封端面,所述阀芯固定在所述阀杆的一端,所述阀芯设置在所述阀体内,所述阀芯与所述水道的密封端面紧密配合,所述安装连接口通过中法兰连接所述阀盖,连接所述阀芯的一段阀杆设置在所述阀体内,所述阀盖通过螺栓、螺母与所述中法兰固定连接,所述阀杆穿过阀盖中心通孔,在所述阀盖与所阀杆的上部之间设置填料密封机构;在所述阀体内侧壁、中法兰端面、接口法兰端面分别全衬氟塑料层;在所述阀体内的阀杆上设置聚四氟乙烯波纹管,所述聚四氟乙烯波纹管两端分别与阀盖内端面、阀芯端面抵触,在所述聚四氟乙烯波纹管上端部与所述阀盖之间设置密封机构,在所述阀体的上端通过支架固定连接气动执行器,所述气动执行器的输出端与所述阀杆的顶端通过连接装置固定连接。The invention comprises a valve body, a valve cover, a valve stem and a valve core, the valve body comprises an inlet and an outlet, the valve body is further provided with a mounting connection port, and the inlet and the outlet respectively provide an interface flange, and the installation connection a middle flange, a middle portion of the water passage between the inlet and the outlet of the valve body is provided with a sealing end surface that cooperates with the valve core, the valve core is fixed at one end of the valve stem, and the valve core is disposed at the valve In the body, the valve core is closely matched with the sealing end surface of the water channel, the mounting connection port is connected to the valve cover through a middle flange, and a valve stem connecting the valve core is disposed in the valve body, the valve The cover is fixedly connected to the middle flange by a bolt and a nut, the valve stem passes through the central through hole of the valve cover, and a packing sealing mechanism is disposed between the valve cover and the upper portion of the valve stem; inside the valve body The wall, the middle flange end surface and the interface flange end surface are respectively lined with a fluoroplastic layer; a PTFE bellows is disposed on the valve stem of the valve body, and the two ends of the PTFE bellows are respectively connected with the bonnet The end face and the end face of the valve core are in contact with each other in the PTFE bellows An end portion disposed between the valve cover and sealing mechanism, the upper end of the valve body by a bracket fixedly connected to the pneumatic actuator, the top of the output of the pneumatic actuator and the valve stem is fixedly connected by connecting means.
本发明采用聚四氟乙烯波纹管作为第一道密封,有效保护介质无法从阀杆处泄漏,构成零泄漏;另外通过气动执行器控制阀门打开,关闭,行程准确,安全可靠。 The invention adopts the polytetrafluoroethylene bellows as the first sealing, effectively protecting the medium from leaking from the valve stem, and forming zero leakage; in addition, the valve is opened and closed by the pneumatic actuator, and the stroke is accurate, safe and reliable.
本发明在所述阀盖与所述阀体之间设置一段管接,所述管接的一端与所述中法兰端面紧密配合,所述管接的另一端与所述阀盖端面紧密配合,所述管接内侧壁及两端端面全衬氟塑料,所述阀盖与所述阀体的中法兰之间通过长螺栓、螺母连接,长螺栓经过所述管接外侧;管接有固定波纹管的作用,有效防止聚四氟乙烯波纹管变形而损坏,造成泄漏,从而使用寿命更长。The invention provides a pipe joint between the valve cover and the valve body, one end of the pipe joint closely matches the end surface of the middle flange, and the other end of the pipe joint closely matches the end surface of the valve cover The inner side wall and the end faces of the pipe are completely lined with fluoroplastic, and the valve cover and the middle flange of the valve body are connected by long bolts and nuts, and the long bolts are connected to the outside through the pipe; The function of the fixed bellows effectively prevents the deformation of the Teflon bellows from being damaged and causes leakage, resulting in a longer service life.
进一步的,所述中法兰端面设置一圈凹面,所述管接紧密配合在所述凹面内,通过凹面连接更稳定、密封效果更好。Further, the middle flange end surface is provided with a concave surface, and the tube joint is tightly fitted in the concave surface, and the concave connection is more stable and the sealing effect is better.
本发明所述填料密封机构为V型多级密封圈组合,所述V型多级密封圈组合设置在阀盖与所述阀杆之间的填料函内,在填料函开口处螺纹连接填料压盖,填料压杆压紧所述V型多级密封圈组合,所述填料压盖穿置在所述阀杆上;此处的填料密封作为波纹管上部的保险密封,是防止戒指外漏,波纹管不坏的情况下,该填料函处于休眠状态,一旦发现从阀杆处外漏,才收紧填料压盖上的螺母,达到保险作用。The packing sealing mechanism of the present invention is a V-type multi-stage sealing ring assembly, and the V-shaped multi-stage sealing ring combination is disposed in a stuffing box between the valve cover and the valve stem, and the packing pressure is screwed at the opening of the stuffing box a cover, a packing pressure rod is pressed against the V-type multi-stage sealing ring assembly, and the packing gland is placed on the valve stem; the packing seal here serves as an insurance seal on the upper part of the bellows to prevent leakage of the ring. When the bellows is not bad, the stuffing box is in a dormant state. Once it is found to leak from the valve stem, the nut on the packing gland is tightened to achieve the insurance function.
本发明所述阀芯包括阀瓣,所述阀瓣包覆有聚四氟乙烯复合材料层,所述阀瓣与所述阀体水道密封端面配合,所述聚四氟乙烯波纹管的一端与所述阀瓣的聚四氟乙烯复合材料层焊接为一体;一体设置可以保证阀门长期持续使用的寿命要求。The valve core of the present invention comprises a valve flap, the valve flap is coated with a layer of polytetrafluoroethylene composite material, the valve flap is matched with the sealing surface end surface of the valve body, and one end of the polytetrafluoroethylene bellows is The PTFE composite material layer of the valve disc is welded as one body; the integral setting can ensure the service life requirement of the valve for long-term continuous use.
本发明所述阀瓣与所述阀体水道的密封端面之间采用锥、平面型密封结构。A tapered and planar sealing structure is adopted between the valve flap of the present invention and the sealing end surface of the valve body water channel.
本发明所述阀杆的上端连接阀杆升降装置,所述阀杆升降装置包括与支架配合的连接块,连接气动执行器的所述支架下端固定在所述阀盖上部,所述支架包括两根支柱、上支撑板、下支撑板,所述下支撑板中心设置通孔,所述下支撑板通过通孔套置在所述阀盖上端部并搁置于阀盖上台阶上,在所述阀盖上端部外侧壁设置螺纹,阀盖上端通过螺纹连接螺母,螺母压紧所述下支撑板;所述上、下支撑板之间通过两根所述支柱支撑连接,在所述两根支柱之间设置所述连接块,所述连接块由两半定位板组成,两半所述定位板从侧面通过螺栓、螺母固定成连接块,各定位板中部分别设有弧形凹槽,两半弧形凹槽合成一个球头容纳腔,各定位板的两个端部分别设置弧形面;所述阀杆的上端设置球头;所述气动执行器固定在所述支架的上支撑板上端,所述气动执行器的输出端设置成球头,所述 阀杆的上端、气动执行器的下端分别通过球头限位连接在所述球头容纳腔内。The upper end of the valve stem of the present invention is connected to the valve stem lifting device, and the valve stem lifting device comprises a connecting block matched with the bracket, and the lower end of the bracket connecting the pneumatic actuator is fixed on the upper part of the valve cover, the bracket comprises two a root post, an upper support plate, a lower support plate, wherein the lower support plate is centrally provided with a through hole, the lower support plate is sleeved on the upper end of the valve cover through the through hole and rests on the step on the valve cover, The upper end of the upper end of the bonnet is provided with a thread, and the upper end of the bonnet is screwed to the nut by a nut, and the nut is pressed against the lower support plate; the upper and lower support plates are supported by the two pillars, and the two pillars are connected The connecting block is disposed between the two half positioning plates, and the two positioning plates are fixed from the side by bolts and nuts into connecting blocks, and each of the positioning plates is respectively provided with an arc-shaped groove, two halves. The arcuate groove is formed into a ball receiving cavity, and the two ends of each positioning plate are respectively provided with a curved surface; the upper end of the valve stem is provided with a ball head; and the pneumatic actuator is fixed on the upper supporting plate end of the bracket , the pneumatic control An output terminal is set to a ball head, said The upper end of the valve stem and the lower end of the pneumatic actuator are respectively connected to the ball receiving cavity by a ball end limit.
本发明通过连接块与支柱配合导向,阀杆、气动执行器的输出端分别通过球头连接在连接块内,启动后,气动执行器的输出端做上、下运动,气动执行器通过连接块带动阀杆上、下运动,阀杆只做升降运动,不做旋转运动,如果做旋转运动,会扭坏波纹管,同时这个横的连接块又作阀门开度指示,就是阀门打开多少,现在通过气动执行器调整,控制更为精确。The invention is guided by the connecting block and the pillar, and the output ends of the valve stem and the pneumatic actuator are respectively connected in the connecting block through the ball head. After starting, the output end of the pneumatic actuator is moved up and down, and the pneumatic actuator passes through the connecting block. Drive the valve stem up and down, the valve stem only moves up and down, does not do the rotary motion. If it rotates, it will twist the bellows. At the same time, this horizontal connecting block is used as the valve opening indication, which is how much the valve opens. Controlled by pneumatic actuators for more precise control.
本发明在所述支架的任一支柱上设置刻度标尺,所述连接块的两端分别设置成三角尖头,所述连接块的尖头端与所述刻度标尺对应设置。通过标尺和尖头的直观显示,可以看出阀杆的行程距离。In the present invention, a scale scale is arranged on any of the pillars of the bracket, and two ends of the joint block are respectively provided as triangular pointed ends, and the pointed end of the connecting block is disposed corresponding to the scale scale. Through the visual display of the ruler and the pointed tip, the travel distance of the valve stem can be seen.
附图说明DRAWINGS
图1为本发明的一种结构示意图。Figure 1 is a schematic view of the structure of the present invention.
具体实施方式detailed description
如图1所示,本气动衬氟波纹管单座调节阀,包括阀体1、阀盖2、阀杆3、阀芯4,阀体1包括进口5、出口6,阀体1还设有安装连接口7,进、出口5、6分别设置接口法兰8,安装连接口7设置中法兰9,阀体1进、出口之间的水道中段设置有与阀芯4配合的密封端面10,阀芯4固定在阀杆3的一端,阀芯4设置在阀体1内,阀芯4与水道的密封端面10紧密配合,安装连接口7通过中法兰9连接阀盖,连接阀芯4的一段阀杆3设置在阀体1内,阀盖2通过螺栓、螺母与中法兰9固定连接,阀杆3穿过阀盖2中心通孔,在阀盖2与阀杆3的上部之间设置填料密封机构11;在阀体1内侧壁、中法兰9端面、接口法兰8端面分别全衬氟塑料层12;在阀体1内的阀杆3上设置聚四氟乙烯波纹管13,聚四氟乙烯波纹管13两端分别与阀盖内端面、阀芯端面抵触,在聚四氟乙烯波纹管13上端部与阀盖2之间设置密封机构14,在阀体1的上端通过支35固定连接气动执行器36,气动执行器36的输出端与阀杆3的顶端通过连接装置37固定连接。As shown in FIG. 1 , the pneumatic lining fluorine bellows single seat regulating valve comprises a valve body 1, a valve cover 2, a valve stem 3 and a valve core 4. The valve body 1 comprises an inlet 5 and an outlet 6, and the valve body 1 is further provided. The connection port 7 is installed, the inlet and outlet 5, 6 are respectively provided with an interface flange 8, and the installation connection port 7 is provided with a middle flange 9. The middle section of the water passage between the inlet and the outlet of the valve body 1 is provided with a sealing end face 10 which cooperates with the valve core 4. The valve core 4 is fixed at one end of the valve stem 3, the valve core 4 is disposed in the valve body 1, the valve core 4 is closely matched with the sealing end surface 10 of the water channel, and the mounting connection port 7 is connected to the valve cover through the middle flange 9 to connect the valve core A section of the valve stem 3 is disposed in the valve body 1. The valve cover 2 is fixedly connected to the middle flange 9 by bolts and nuts, and the valve stem 3 passes through the central through hole of the valve cover 2 at the upper part of the valve cover 2 and the valve stem 3. A packing sealing mechanism 11 is disposed between the inner side wall of the valve body 1, the end surface of the middle flange 9 and the end surface of the interface flange 8 respectively lined with the fluoroplastic layer 12; the PTFE layer is disposed on the valve stem 3 in the valve body 1 The tube 13 and the two ends of the Teflon bellows 13 are respectively in contact with the inner end surface of the valve cover and the end surface of the valve core, and a seal is arranged between the upper end portion of the Teflon bellows 13 and the valve cover 2 Structure 14, the upper end of the valve body 1 is fixedly connected to a pneumatic actuator 36 through the branch 35, the output of the top 36 of the pneumatic actuator and valve stem 3 by the connecting means 37 is fixedly connected.
阀杆3的上端连接阀杆升降装置15,阀杆升降装置15包括与支架35配合的连接块19,连接气动执行器36的支架35下端固定在阀盖2上部,支架35包括两根支柱18、上支撑板16、下支撑板17,下支撑板17中心设置通孔,下支撑板17通过通孔套置在阀盖2上端部并搁置于阀盖2上台阶上,在阀盖2上 端部外侧壁设置螺纹,阀盖2上端通过螺纹连接螺母22,螺母22压紧下支撑板17;上、下支撑板16、17之间通过两根支柱18支撑连接,在两根支柱18之间设置连接块19,连接块19由两半定位板24组成,两半定位板24从侧面通过螺栓、螺母固定成连接块19,各定位板24中部分别设有弧形凹槽,两半弧形凹槽合成一个球头容纳腔;阀杆3的上端设置球头,气动执行器36固定在支架35顶端,气动执行器36的输出端设置成球头,阀杆3的上端、气动执行器36的下端分别通过球头限位连接在球头容纳腔内。在支架35的支柱上设置刻度标尺20,连接块19的两端分别设置成三角尖头,连接块19的尖头端与刻度标尺20对应设置。The upper end of the valve stem 3 is connected to the valve stem lifting device 15. The valve stem lifting device 15 includes a connecting block 19 that cooperates with the bracket 35. The lower end of the bracket 35 that connects the pneumatic actuator 36 is fixed to the upper portion of the valve cover 2. The bracket 35 includes two pillars 18 , the upper support plate 16 , the lower support plate 17 , the lower support plate 17 is centrally provided with a through hole, and the lower support plate 17 is placed on the upper end of the valve cover 2 through the through hole and rests on the step of the valve cover 2 on the valve cover 2 The outer side wall of the end is provided with a thread, the upper end of the valve cover 2 is screwed to the nut 22, and the nut 22 is pressed against the lower support plate 17; the upper and lower support plates 16 and 17 are supported by the two pillars 18, and the two pillars 18 are The connecting block 19 is provided, and the connecting block 19 is composed of two half positioning plates 24, and the two positioning plates 24 are fixed from the side by bolts and nuts to the connecting block 19, and the central portions of each positioning plate 24 are respectively provided with arc-shaped grooves, two arcs. The groove forms a ball receiving cavity; the upper end of the valve stem 3 is provided with a ball head, the pneumatic actuator 36 is fixed on the top of the bracket 35, the output end of the pneumatic actuator 36 is arranged as a ball head, the upper end of the valve stem 3, the pneumatic actuator The lower end of the 36 is connected to the ball receiving cavity by a ball end limit. A scale scale 20 is disposed on the pillar of the bracket 35, and both ends of the joint block 19 are respectively provided as triangular tips, and the pointed end of the joint block 19 is disposed corresponding to the scale scale 20.
进一步的在阀盖2与阀体1之间设置一段管接27,管接27的一端与中法兰9端面紧密配合,管接27的另一端与阀盖2端面紧密配合,管接27内侧壁及两端端面全衬氟塑料层,阀盖2与阀体1的中法兰9之间通过长螺栓28、螺母29连接,长螺栓28经过管接27外侧;中法兰9端面设置一圈凹面30,管接27紧密配合在凹面30内;管接27有固定波纹管的作用,有效防止聚四氟乙烯波纹管变形而损坏,造成泄漏,从而使用寿命更长。Further, a pipe joint 27 is disposed between the valve cover 2 and the valve body 1, and one end of the pipe joint 27 is tightly fitted with the end surface of the middle flange 9, and the other end of the pipe joint 27 is closely matched with the end surface of the valve cover 2, and the inner side of the pipe joint 27 The wall and the end faces are completely lined with a fluoroplastic layer, and the valve cover 2 and the middle flange 9 of the valve body 1 are connected by a long bolt 28 and a nut 29, and the long bolt 28 passes through the outer side of the pipe joint 27; The concave surface 30, the pipe joint 27 is tightly fitted in the concave surface 30; the pipe joint 27 has the function of fixing the bellows, effectively preventing the deformation of the Teflon bellows and causing leakage, thereby prolonging the service life.
填料密封机构11为V型多级密封圈组合31,V型多级密封圈组合31设置在阀盖2与阀杆3之间的填料函32内,在填料函32开口处螺纹连接填料压盖33,填料压盖33压紧V型多级密封圈组合31,填料压盖33穿置在阀杆3上;此处的填料密封作为波纹管上部的保险密封。The packing sealing mechanism 11 is a V-type multi-stage sealing ring assembly 31. The V-type multi-stage sealing ring assembly 31 is disposed in the stuffing box 32 between the valve cover 2 and the valve stem 3, and the packing gland is screwed at the opening of the stuffing box 32. 33. The packing gland 33 presses the V-type multi-stage seal ring assembly 31, and the packing gland 33 is placed on the valve stem 3; the packing seal here serves as a safety seal for the upper portion of the bellows.
阀芯4包括阀瓣34,阀瓣34包覆有聚四氟乙烯复合材料层,阀瓣34与阀体1水道密封端面10配合,聚四氟乙烯波纹管13的一端与阀瓣34的聚四氟乙烯复合材料层焊接为一体;阀瓣34与阀体1水道的密封端面之间采用锥、平面型密封结构。 The valve core 4 includes a valve flap 34, the valve flap 34 is covered with a layer of polytetrafluoroethylene composite material, the valve flap 34 is matched with the water passage sealing end surface 10 of the valve body 1, and one end of the polytetrafluoroethylene bellows 13 is assembled with the valve flap 34. The layer of tetrafluoroethylene composite material is welded integrally; a cone and a flat sealing structure are adopted between the valve flap 34 and the sealing end surface of the valve body 1 channel.

Claims (8)

  1. 气动衬氟波纹管单座调节阀,包括阀体、阀盖、阀杆、阀芯,所述阀体包括进口、出口,所述阀体还设有安装连接口,所述进、出口分别设置接口法兰,所述安装连接口设置中法兰,所述阀体进、出口之间的水道中段设置有与阀芯配合的密封端面,所述阀芯固定在所述阀杆的一端,所述阀芯设置在所述阀体内,所述阀芯与所述水道的密封端面紧密配合,所述安装连接口通过中法兰连接所述阀盖,连接所述阀芯的一段阀杆设置在所述阀体内,所述阀盖通过螺栓、螺母与所述中法兰固定连接,所述阀杆穿过阀盖中心通孔,在所述阀盖与所阀杆的上部之间设置填料密封机构;在所述阀体内侧壁、中法兰端面、接口法兰端面分别全衬氟塑料层;在所述阀体内的阀杆上设置聚四氟乙烯波纹管,所述聚四氟乙烯波纹管两端分别与阀盖内端面、阀芯端面抵触,在所述聚四氟乙烯波纹管上端部与所述阀盖之间设置密封机构,其特征在于在所述阀体的上端通过支架固定连接气动执行器,所述气动执行器的输出端与所述阀杆的顶端通过连接装置固定连接。The pneumatic lining fluorine bellows single seat regulating valve comprises a valve body, a valve cover, a valve stem and a valve core, the valve body comprises an inlet and an outlet, and the valve body is further provided with a mounting connection port, wherein the inlet and the outlet are respectively set An interface flange, wherein the installation connection port is provided with a middle flange, and a middle portion of the water passage between the inlet and the outlet of the valve body is provided with a sealing end surface matched with the valve core, and the valve core is fixed at one end of the valve stem The valve core is disposed in the valve body, the valve core is closely matched with the sealing end surface of the water channel, the mounting connection port is connected to the valve cover through a middle flange, and a section of the valve stem connected to the valve core is disposed at In the valve body, the valve cover is fixedly connected to the middle flange by bolts and nuts, the valve stem passes through a central through hole of the valve cover, and a packing seal is arranged between the valve cover and the upper portion of the valve stem. a mechanism; a fluoroplastic layer is completely lined on the valve body sidewall, the middle flange end surface, and the interface flange end surface; a PTFE bellows is disposed on the valve stem of the valve body, and the PTFE corrugated tube The two ends of the tube respectively interfere with the inner end surface of the valve cover and the end surface of the valve core, A sealing mechanism is disposed between the upper end portion of the polytetrafluoroethylene bellows and the valve cover, wherein a pneumatic actuator is fixedly connected to the upper end of the valve body by a bracket, and an output end of the pneumatic actuator and the valve are The top end of the rod is fixedly connected by a connecting device.
  2. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于在所述阀盖与所述阀体之间设置一段管接,所述管接的一端与所述中法兰端面紧密配合,所述管接的另一端与所述阀盖端面紧密配合,所述管接内侧壁及两端端面全衬氟塑料,所述阀盖与所述阀体的中法兰之间通过长螺栓、螺母连接,长螺栓经过所述管接外侧。The pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein a pipe joint is arranged between the valve cover and the valve body, and one end of the pipe joint and the middle flange end face are provided. Tightly fitting, the other end of the pipe joint is closely matched with the end surface of the valve cover, the inner side wall and the end faces of the pipe are completely lined with fluoroplastic, and the valve cover passes between the middle flange of the valve body and the valve body Long bolts and nuts are connected, and long bolts are connected to the outside through the tube.
  3. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于所述中法兰端面设置一圈凹面,所述管接紧密配合在所述凹面内。The pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein the intermediate flange end surface is provided with a concave surface, and the tube joint is tightly fitted in the concave surface.
  4. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于所述填料密 封机构为V型多级密封圈组合,所述V型多级密封圈组合设置在阀盖与所述阀杆之间的填料函内,在填料函开口处螺纹连接填料压盖,填料压杆压紧所述V型多级密封圈组合,所述填料压盖穿置在所述阀杆上。A pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein said packing is dense The sealing mechanism is a V-type multi-stage sealing ring assembly, and the V-shaped multi-stage sealing ring combination is disposed in a stuffing box between the valve cover and the valve stem, and the packing gland is screwed at the opening of the stuffing box, and the packing pressing rod is The V-shaped multi-stage seal combination is pressed, and the packing gland is placed on the valve stem.
  5. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于所述阀芯包括阀瓣,所述阀瓣包覆有聚四氟乙烯复合材料层,所述阀瓣与所述阀体水道密封端面配合,所述聚四氟乙烯波纹管的一端与所述阀瓣的聚四氟乙烯复合材料层焊接为一体。The pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein said valve core comprises a valve flap, said valve flap is coated with a layer of polytetrafluoroethylene composite material, said valve flap and said valve flap The valve body water channel sealing end surface is matched, and one end of the Teflon bellows is welded with the valve layer PTFE composite material layer.
  6. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于所述阀瓣与所述阀体水道的密封端面之间采用锥、平面型密封结构。The pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein a tapered and flat sealing structure is adopted between the valve flap and the sealing end surface of the valve body water passage.
  7. 根据权利要求1所述的气动衬氟波纹管单座调节阀,其特征在于所述阀杆的上端连接阀杆升降装置,所述阀杆升降装置包括与支架配合的连接块,连接气动执行器的所述支架下端固定在所述阀盖上部,所述支架包括两根支柱、上支撑板、下支撑板,所述下支撑板中心设置通孔,所述下支撑板通过通孔套置在所述阀盖上端部并搁置于阀盖上台阶上,在所述阀盖上端部外侧壁设置螺纹,阀盖上端通过螺纹连接螺母,螺母压紧所述下支撑板;所述上、下支撑板之间通过两根所述支柱支撑连接,在所述两根支柱之间设置所述连接块,所述连接块由两半定位板组成,两半所述定位板从侧面通过螺栓、螺母固定成连接块,各定位板中部分别设有弧形凹槽,两半弧形凹槽合成一个球头容纳腔,各定位板的两个端部分别设置弧形面;所述阀杆的上端设置球头;所述气动执行器固定在所述支架的上支撑板上端,所述气动执行器的输出端设置成球头,所述阀杆的上端、气动执行器的下端分别通过球头限位连接在所述球头容纳腔内。The pneumatic lining fluorine bellows single seat regulating valve according to claim 1, wherein the upper end of the valve stem is connected with a valve stem lifting device, and the valve stem lifting device comprises a connecting block matched with the bracket, and the pneumatic actuator is connected The lower end of the bracket is fixed on the upper part of the valve cover, the bracket comprises two pillars, an upper support plate and a lower support plate, and the lower support plate is centrally provided with a through hole, and the lower support plate is sleeved through the through hole The upper end of the valve cover rests on the step of the valve cover, and the outer side wall of the upper end of the valve cover is provided with a thread, and the upper end of the valve cover is screwed with a nut, and the nut is pressed against the lower support plate; the upper and lower supports The connecting plates are supported by two of the pillars, and the connecting block is disposed between the two pillars. The connecting block is composed of two semi-locating plates, and the two positioning plates are fixed by bolts and nuts from the side. Forming a connecting block, each of the positioning plates is respectively provided with an arc-shaped groove, and the two semi-arc grooves form a ball-shaped receiving cavity, and the two end portions of each positioning plate are respectively provided with a curved surface; the upper end of the valve stem is disposed Ball head The actuator is fixed on the upper support upper end of the bracket, the output end of the pneumatic actuator is arranged as a ball head, and the upper end of the valve stem and the lower end of the pneumatic actuator are respectively connected to the ball through the ball end limit The head accommodates the cavity.
  8. 根据权利要求7所述的气动衬氟波纹管单座调节阀,其特征在于在所述支架 的任一支柱上设置刻度标尺,所述连接块的两端分别设置成三角尖头,所述连接块的尖头端与所述刻度标尺对应设置。 A pneumatic lining fluorine bellows single seat regulating valve according to claim 7, wherein said bracket A scale ruler is disposed on any of the pillars, and both ends of the connection block are respectively disposed as triangular tips, and the pointed end of the connection block is disposed corresponding to the scale scale.
PCT/CN2017/081190 2017-02-24 2017-04-20 Pneumatic fluorine-lined corrugated pipe single-seat regulating valve WO2018152947A1 (en)

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