CN112483674A - Plug valve easy to adjust and reliable in sealing - Google Patents

Plug valve easy to adjust and reliable in sealing Download PDF

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Publication number
CN112483674A
CN112483674A CN202011461286.5A CN202011461286A CN112483674A CN 112483674 A CN112483674 A CN 112483674A CN 202011461286 A CN202011461286 A CN 202011461286A CN 112483674 A CN112483674 A CN 112483674A
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CN
China
Prior art keywords
valve
packing
adjustment
plug
pressure plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011461286.5A
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Chinese (zh)
Inventor
邱晓来
张峰
刘飞宏
单海涛
叶建伟
黄朝温
潘建瓯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chaoda Valve Group Co ltd
Wanhua Chemical Group Co Ltd
Original Assignee
Chaoda Valve Group Co ltd
Wanhua Chemical Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chaoda Valve Group Co ltd, Wanhua Chemical Group Co Ltd filed Critical Chaoda Valve Group Co ltd
Priority to CN202011461286.5A priority Critical patent/CN112483674A/en
Publication of CN112483674A publication Critical patent/CN112483674A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0242—Spindles and actuating means
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0257—Packings
    • F16K5/0264—Packings in the housing
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0257—Packings
    • F16K5/0271—Packings between housing and plug
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0257—Packings
    • F16K5/0285—Packings spindle sealing
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/16—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces
    • F16K5/161—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/16—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces
    • F16K5/162—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces with the plugs or parts of the plugs mechanically pressing the seal against the housing
    • F16K5/163—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces with the plugs or parts of the plugs mechanically pressing the seal against the housing adjustable in height

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

The invention relates to a plug valve which is simple and convenient to adjust and reliable in sealing, and the plug valve comprises a valve body, a valve rod and a plug cock, wherein a flow passage is arranged in the valve body, the valve rod drives the plug cock to rotate to control the flow passage to be communicated and cut off, a valve cover which seals an upper opening of the valve body and allows the valve rod to pass through is fixedly arranged above the valve body, the plug cock is a cone with a large upper part and a small lower part, two sides of the valve body, which are positioned on the plug cock, are respectively provided with a bushing which is in sealing fit, the plug valve further comprises a pressing plate which is positioned above the valve cover, the valve rod passes through the pressing plate and is positioned below the pressing plate, an adjusting step which is abutted. By adopting the scheme, the plug valve which is simple and convenient to adjust and reliable in sealing is provided, and is suitable for occasions with high sealing requirements and high pressure.

Description

Plug valve easy to adjust and reliable in sealing
Technical Field
The invention relates to the field of plug valves, in particular to a plug valve which is simple and convenient to adjust and reliable in sealing.
Background
The plug valve is a closure member or a plunger-shaped rotary valve, and the channel port on the plug valve is communicated with or separated from the channel port on the valve body by rotating 90 degrees, so that the valve is opened or closed. As shown in fig. 1-2, a typical structure of a conventional plug valve is shown, where 1 'is a valve body, 2' is a bushing, 3 'is a plug (usually, a valve stem and the plug are designed as a whole), 4' is a sealing diaphragm, 5 'is a metal diaphragm, 6' is a fireproof sealing ring, 7 'is a pressure plate, 8' is a valve cover, 9 'is a screw, and 10' is a wrench or a hand wheel. In order to ensure reliable sealing of the sealing surface of the valve, the bushing 2 'is usually made of non-metallic materials such as polytetrafluoroethylene, the plug 3' and the valve rod are designed into a whole, the sealing diaphragm 4 'is usually made of non-metallic materials such as polytetrafluoroethylene, the sealing diaphragm 4' is used for sealing between the valve body 1 'and the valve cover 8' and simultaneously used for sealing between the valve rod 3 '(integrated with the plug) and the valve cover 8', the metal diaphragm 5 'is used for supporting and protecting the sealing diaphragm 4', the fireproof sealing ring 6 'is usually made of materials such as flexible graphite, and when the sealing diaphragm 4' is burnt out in a fire disaster, the fireproof sealing ring 6 'is used for preventing a medium in the valve cavity from leaking from a gap between the valve rod 3' (integrated with the plug) and the valve cover 8. The cock 3 ' is generally designed to be a cone with a large upper part and a small lower part, the up-down position of the cock 3 ' is adjusted through the screw 9 ' and the pressing plate 7 ', the cock 3 ' moves downwards, the joint of the cock 3 ' and the bushing 2 ' is tighter, the sealing of the valve seat is more reliable, but the switching torque of the valve is increased, and the cock 3 ' and the bushing 2 ' are adjusted to be close to each other through the screw 9 ' and the pressing plate 7 ', so that the cock 3 ' and the bushing 2 ' have good sealing performance, and the cock has the proper switching torque.
The sealing membrane 4 ' of the conventional plug valve is used for sealing between the valve body 1 ' and the valve cover 8 ' and between the valve rod 3 ' (integrated with the plug) and the valve cover 8 ', once the sealing membrane 4 ' is damaged, the external leakage of the valve can be caused, and when the plug 3 ' is adjusted up and down, the sealing membrane 4 ' needs to move up and down along with the plug 3 ', so that the sealing membrane 4 ' cannot be manufactured to be too thick, and the sealing membrane 4 ' cannot move. The sealing diaphragm 4 ' is thin and has low sealing reliability between the valve rod 3 ' (integrated with the plug) and the valve cover 8 ', so that the conventional plug valve cannot be used in occasions with high sealing requirements and high pressure occasions. Moreover, the seal between the plug 3 'and the bush 2' of the conventional plug valve and the seal between the stem 3 '(integral with the plug) and the bonnet 8 are adjusted by the screw 9', which is difficult to perfectly compromise.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a plug valve which is simple and convenient to adjust and reliable in sealing, and is suitable for occasions with high sealing requirements and high pressure.
In order to achieve the purpose, the invention provides the following technical scheme: including valve body, valve rod and cock, the valve body in be provided with the runner, the rotatory circulation and the cutting off of control runner of valve rod drive cock, valve body top fixed be provided with the upper shed of valve body seal and supply the valve gap that the valve rod passed, the cock be big-end-up's cone, the valve body be located the cock both sides and be provided with sealed complex bush, its characterized in that respectively: the valve rod penetrates through the pressing plate and is located below the pressing plate, an adjusting step which is abutted to the pressing plate is arranged on the valve rod, a threaded adjusting part vertically penetrates through the pressing plate, the upper end of the threaded adjusting part is provided with an adjusting head which is limited above the pressing plate, and the lower end of the threaded adjusting part is provided with an adjusting thread section which is matched with the valve cover in a threaded manner.
Through adopting the above-mentioned technical scheme, set up independent and lie in the outer cock altitude mixture control structure of valve body, seal structure between with cock and the bush and seal structure between valve rod and the valve gap and the seal structure between valve body and the valve gap separate, avoid in the traditional structure because of synthesizing the three and make the plug valve can't be used for the sealed occasion that requires highly, also can't be applicable to the high pressure occasion, in this scheme, rotatory screw thread regulating part, head altitude mixture control clamp plate height is adjusted to the accessible, and then adjust the cock height with the valve rod linkage, make the inseparabler laminating of cock and bush, the sealing of plug valve is better, when screw thread regulating part is located suitable position, can make the existing good sealing performance of plug valve, simultaneously the moment of torsion of opening and close of plug valve can not be too big again, the opening and closing that the.
The invention is further configured to: the threaded adjusting piece is sleeved with an adjusting spring compressed between the adjusting head and the pressing plate.
Through adopting above-mentioned technical scheme, the regulation of cock sealing force adopts the regulating spring loading, regulating spring makes the height of valve rod and cock be in automatic dynamic adjustment state through the clamp plate, can guarantee that sealed between cock and the bush is reliable, also can not lead to the cock to open and close the moment of torsion too big because sealing force is too big, and simultaneously, regulating spring still has the compensation function, ensure sealed long-term reliable between cock and the bush, furthermore, rotatory screw thread regulating part, through adjusting head extrusion regulating spring, control regulating spring's compression degree, and then adjust the sealing force size that acts on the cock, make the regulatory function more perfect.
The invention is further configured to: the top of the pressing plate is provided with an adjusting groove corresponding to the adjusting head, and the adjusting spring is positioned on the adjusting spring and the lower end of the adjusting spring is abutted against the bottom surface of the adjusting groove.
Through adopting above-mentioned technical scheme, add the adjustment tank, improve adjusting spring's installation stability to guarantee the directional stability of its elastic force.
The invention is further configured to: the pressure plate below surround the valve rod and be provided with the bearing groove, the bearing inslot be provided with and constitute valve rod and the horizontal normal running fit's of pressure plate bearing, the relative vertical position of bearing constitute the butt of pressure plate and regulation step between pressure plate and the regulation step.
Through adopting above-mentioned technical scheme, add the bearing groove of bearing and installation bearing, make opening and close of plug valve lighter, effectively prevent the friction damage of plug valve between opening and close in-process rotating part and non-rotating part, increase of service life.
The invention is further configured to: and a gasket is compressed between the bearing and the adjusting step.
Through adopting above-mentioned technical scheme, the packing ring of placing different thickness can effectively adjust the clamp plate and adjust the interval of step, the different specifications of adaptation.
The invention is further configured to: the part of the valve body, which is contacted with the lining, is provided with a plurality of grooves.
Through adopting above-mentioned technical scheme, add a plurality of slots, ensure the firm combination of bush and valve body, the bush can not be at valve body internal rotation and break away from during the use.
The invention is further configured to: a sealing gasket surrounding an opening on the valve body is arranged between the valve body and the valve cover, and the sealing gasket is formed by winding stainless steel and flexible graphite.
Through adopting above-mentioned technical scheme, encircle the mode that sets up and make sealed effect more comprehensive, and the seal gasket that adopts stainless steel and flexible graphite winding to form then has better fire prevention function, guarantees sealed reliability.
The invention is further configured to: valve gap top encircle the valve rod and be provided with the packing chamber, the packing intracavity be provided with flexible graphite and pack, the valve body be provided with the packing that compresses tightly flexible graphite packing in the packing chamber and compress tightly the subassembly, the valve gap encircle the valve rod and be provided with the seal groove, the seal groove in be provided with fluorine rubber O type circle.
Through adopting above-mentioned technical scheme, the double seal combination of flexible graphite filler and fluororubber O type circle improves the sealing reliability greatly, also has better fire prevention function simultaneously.
The invention is further configured to: the packing compression assembly comprises a packing gland, a packing compression sleeve, a packing threaded part and a packing spring, the packing gland is located above the valve cover, the packing compression sleeve is located below the packing gland and extends into the packing cavity, the packing threaded part vertically penetrates through the packing gland, a packing head part located above the packing gland is arranged at the upper end of the packing threaded part, a packing thread section matched with the valve cover in a threaded manner is arranged at the lower end of the packing threaded part, a compensation groove is arranged above the packing gland and corresponds to the packing head part, and the packing spring is located in the compensation groove and is compressed between the packing head part and the packing gland.
By adopting the technical scheme, the packing spring is additionally arranged, the position of the packing gland is timely compensated towards the flexible graphite packing, the flexible graphite packing is guaranteed to be in a compression state for a long time, and therefore the long-time sealing reliability of the flexible graphite packing is guaranteed.
Drawings
FIG. 1 is a cross-sectional view of a plug valve of this conventional construction;
FIG. 2 is an enlarged view of A in FIG. 1
Fig. 3 is a cross-sectional view of an embodiment of the present invention;
fig. 4 is a longitudinal sectional view of an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 3-4, the invention discloses a plug valve with simple adjustment and reliable sealing, which comprises a valve body 1, a valve rod 2 and a plug cock 3, wherein a flow passage 11 is arranged in the valve body 1, the valve rod 2 drives the plug cock 3 to rotate to control the circulation and the cut-off of the flow passage 11, the upper end of the valve rod 2 is provided with a hand wheel or a wrench 22 for driving the valve rod to rotate, a valve cover 4 for sealing an upper opening 12 of the valve body 1 and allowing the valve rod 2 to pass through is fixedly arranged above the valve body 1, the plug cock 3 is a cone with a large upper part and a small lower part, the valve body 1 is respectively provided with a bushing 5 which is in sealing fit at two sides of the plug cock 3, the bushing 5 is usually made of polytetrafluoroethylene or reinforced polytetrafluoroethylene, the plug valve further comprises a pressure plate 6 which is arranged above the valve cover 4, the valve rod 2 passes through the pressure plate 6 and is provided with an, the upper end of the thread adjusting piece 61 is provided with an adjusting head portion 611 limited above the pressing plate 6, the lower end is provided with an adjusting thread portion 612 in thread fit with the valve cover 4, and a cock 3 height adjusting structure which is independent and positioned outside the valve body 1 is arranged, so that the sealing structure between the cock 3 and the bushing 5, the sealing structure between the valve rod 2 and the valve cover 4 and the sealing structure between the valve body 1 and the valve cover 4 are separated, the situation that the conventional structure cannot be used in the occasion with high sealing requirement and cannot be applied to the high-pressure occasion due to the integration of the three is avoided, in the scheme, the thread adjusting piece 61 is rotated, the height of the pressing plate 6 can be adjusted through the height of the adjusting head portion 611, and then the height of the cock 3 linked with the valve rod 1 is adjusted, the cock is more tightly attached to the bushing, the sealing of the cock is better, and when the, meanwhile, the opening and closing torque of the plug valve cannot be too large, and the plug valve can be opened and closed easily.
The threaded adjusting piece 61 is sleeved with an adjusting spring 62 compressed between the adjusting head portion 611 and the pressing plate 6, the adjusting spring 62 is preferably a belleville spring, the adjusting spring 62 is used for loading the sealing force of the plug 3, the adjusting spring 62 enables the heights of the valve rod 2 and the plug 3 to be in an automatic dynamic adjusting state through the pressing plate 6, the sealing reliability between the plug 3 and the bushing 5 can be guaranteed, the overlarge opening and closing torque of the plug valve due to overlarge sealing force cannot be caused, meanwhile, the adjusting spring also has a compensation function, the long-term reliability of sealing between the plug 3 and the bushing 5 is guaranteed, in addition, the threaded adjusting piece 61 is rotated, the adjusting spring 62 is extruded through the adjusting head portion 611, the compression degree of the adjusting spring 62 is controlled, the sealing force acting on the plug 3 is adjusted, and the adjusting function is more.
The upper part of the pressure plate 6 is provided with an adjusting groove 63 corresponding to the adjusting head 611, the adjusting spring 62 is positioned on the adjusting spring 62, the lower end of the adjusting spring 62 is abutted to the bottom surface of the adjusting groove 63, the adjusting groove 63 is additionally arranged, the installation stability of the adjusting spring 62 is improved, and the directional stability of the elastic force of the adjusting spring is ensured.
Pressing plate 6 below is provided with bearing groove 64 around valve rod 2, be provided with in the bearing groove 64 and constitute valve rod 2 and the bearing 65 of the 6 horizontal normal running fit of pressing plate, bearing 65 is vertical to be located pressing plate 6 relatively and adjusts the butt that constitutes pressing plate 6 and adjust step 21 between the step 21, add bearing 65 and installation bearing 65's bearing groove 64, make opening and close of 3 valves of cock light more easily, prevent effectively that 3 valves of cock from opening and close the friction damage between in-process rotating part and the non-rotating part, increase of service life.
The bearing 65 and the adjusting step 21 are compressed to form a gasket 66, and the gaskets 66 with different thicknesses can be placed to effectively adjust the distance between the pressing plate 6 and the adjusting step 21 to adapt to different specifications.
The part of the valve body 1, which is contacted with the lining 5, is provided with a plurality of grooves 13, and the grooves 13 are additionally arranged, so that the lining 5 is firmly combined with the valve body 1, and the lining 5 cannot rotate and separate in the valve body 1 when in use.
Set up seal gasket 41 around opening 12 on the valve body 1 between valve body 1 and the valve gap 4, seal gasket 41 is formed by stainless steel and flexible graphite winding, and it is more comprehensive to encircle the mode that sets up to make sealed effect, and seal gasket 41 that adopts stainless steel and flexible graphite winding to form then has better fire prevention function, guarantees sealed reliability.
Valve gap 4 top is provided with packing chamber 42 around valve rod 2, be provided with flexible graphite packing 43 in packing chamber 42, valve body 1 is provided with and compresses tightly the subassembly in packing of packing chamber 42 with flexible graphite packing 43, valve gap 4 encircles valve rod 2 and is provided with seal groove 44, is provided with fluororubber O type circle 45 in the seal groove 44, the double-seal combination of flexible graphite packing 43 and fluororubber O type circle 45 improves sealing reliability greatly, also has better fire prevention function simultaneously.
The packing pressing component comprises a packing pressing cover 7 and a packing pressing sleeve 71, the packing screw 72 vertically penetrates through the packing gland 7, the upper end of the packing screw 72 is provided with a packing head 721 positioned above the packing gland 7, the lower end of the packing screw is provided with a packing thread section 722 in threaded fit with the valve cover 4, the packing screw 72 is composed of a bolt and a screw, a compensation groove 74 is arranged above the packing gland 7 corresponding to the packing head 721, the packing spring 73 is positioned in the compensation groove 74 and compressed between the packing head 721 and the packing gland 7, the packing spring 73 is additionally arranged, the position of the packing gland 7 is timely compensated towards the flexible graphite packing 43, the flexible graphite packing 43 is guaranteed to be in a compressed state for a long time, and long-time sealing reliability of the flexible graphite packing 43 is guaranteed.

Claims (9)

1.一种调节简便密封可靠的旋塞阀，包括阀体、阀杆及旋塞，所述的阀体内设置有流道，所述的阀杆驱动旋塞旋转控制流道的流通及切断，所述的阀体上方固定设置有将阀体的上开口封闭并供阀杆穿过的阀盖，所述的旋塞呈上大下小的锥体，所述的阀体位于旋塞两侧分别设置有密封配合的衬套，其特征在于：还包括位于阀盖上方的压板，所述的阀杆穿过压板并位于压板下方设置有与压板相抵的调节台阶，所述的压板沿竖向穿设有螺纹调节件，所述的螺纹调节件上端设置有限位于压板上方的调节头部，下端设置有与阀盖螺纹配合的调节螺纹段。1. A plug valve with easy adjustment and reliable sealing, including a valve body, a valve stem and a cock, the valve body is provided with a flow channel, and the valve stem drives the cock to rotate to control the circulation and cut-off of the flow channel. A valve cover is fixed above the valve body, which closes the upper opening of the valve body and allows the valve stem to pass through. The bushing is characterized in that: it also includes a pressure plate located above the valve cover, the valve stem passes through the pressure plate and is located below the pressure plate with an adjustment step that is abutted against the pressure plate, and the pressure plate is vertically threaded with thread adjustment steps The upper end of the threaded adjustment piece is provided with an adjustment head that is limitedly located above the pressure plate, and the lower end is provided with an adjustment thread segment that is threaded with the valve cover. 2.根据权利要求1所述的调节简便密封可靠的旋塞阀，其特征在于：所述的螺纹调节件套设有压缩于调节头部与压板之间的调节弹簧。2 . The plug valve with easy adjustment and reliable sealing according to claim 1 , wherein the threaded adjustment member is sleeved with an adjustment spring that is compressed between the adjustment head and the pressure plate. 3 . 3.根据权利要求2所述的调节简便密封可靠的旋塞阀，其特征在于：所述的压板上方对应调节头部设置有调节槽，所述的调节弹簧位于调节弹簧且下端与调节槽底面相抵。3. The plug valve with simple adjustment and reliable sealing according to claim 2, characterized in that: an adjustment groove is provided above the pressure plate corresponding to the adjustment head, the adjustment spring is located in the adjustment spring and the lower end is in contact with the bottom surface of the adjustment groove . 4.根据权利要求1所述的调节简便密封可靠的旋塞阀，其特征在于：所述的压板下方环绕阀杆设置有轴承槽，所述的轴承槽内设置有构成阀杆与压板水平转动配合的轴承，所述的轴承相对竖向位于压板与调节台阶之间构成压板与调节台阶的抵接。4. The plug valve with simple adjustment and reliable sealing according to claim 1, characterized in that: a bearing groove is arranged around the valve stem under the pressure plate, and a bearing groove is arranged in the bearing groove to form a horizontal rotation between the valve stem and the pressure plate. The bearing is located between the pressure plate and the adjustment step relatively vertically to form the abutment between the pressure plate and the adjustment step. 5.根据权利要求2所述的调节简便密封可靠的旋塞阀，其特征在于：所述的轴承与调节台阶之间压缩设置有垫圈。5 . The plug valve with simple adjustment and reliable sealing according to claim 2 , wherein a gasket is compressed and arranged between the bearing and the adjustment step. 6 . 6.根据权利要求1所述的调节简便密封可靠的旋塞阀，其特征在于：所述的阀体与衬套接触的部分设置有多个沟槽。6 . The plug valve with simple adjustment and reliable sealing according to claim 1 , wherein a plurality of grooves are arranged on the part of the valve body in contact with the bushing. 7 . 7.根据权利要求1所述的调节简便密封可靠的旋塞阀，其特征在于：所述的阀体与阀盖之间设置环绕阀体上开口的密封垫片，所述的密封垫片由不锈钢和柔性石墨缠绕而成。7. The plug valve with easy adjustment and reliable sealing according to claim 1, wherein a sealing gasket surrounding the opening on the valve body is arranged between the valve body and the valve cover, and the sealing gasket is made of stainless steel. It is wound with flexible graphite. 8.根据权利要求1所述的调节简便密封可靠的旋塞阀，其特征在于：所述的阀盖上方环绕阀杆设置有填料腔，所述的填料腔内设置有柔性石墨填料，所述的阀体设置有将柔性石墨填料压紧于填料腔的填料压紧组件，所述的阀盖环绕阀杆设置有密封槽，所述的密封槽内设置有氟橡胶O型圈。8 . The plug valve with simple adjustment and reliable sealing according to claim 1 , wherein a packing cavity is arranged around the valve stem above the valve cover, and a flexible graphite packing is arranged in the packing cavity. 9 . The valve body is provided with a packing pressing component for pressing the flexible graphite packing into the packing cavity, the valve cover is provided with a sealing groove around the valve stem, and a fluororubber O-ring is arranged in the sealing groove. 9.根据权利要求6所述的调节简便密封可靠的旋塞阀，其特征在于：所述的填料压紧组件包括填料压盖、填料压套、填料螺纹件及填料弹簧，所述的填料压盖位于阀盖上方，所述的填料压套位于填料压盖下方并延伸至填料腔内，所述的填料螺纹件沿竖向穿过填料压盖，所述的填料螺纹件上端设置有位于填料压盖上方的填料头部，下端设置有与阀盖螺纹配合的填料螺纹段，所述的填料压盖上方对应填料头部设置有补偿槽，所述的填料弹簧位于补偿槽内并压缩于填料头部与填料压盖之间。9. The plug valve with simple adjustment and reliable sealing according to claim 6, characterized in that: the packing pressing component comprises a packing gland, a packing pressing sleeve, a packing screw and a packing spring, and the packing gland Located above the valve cover, the packing gland is located below the packing gland and extends into the packing cavity, the packing screw vertically passes through the packing gland, and the upper end of the packing screw is provided with a position located at the top of the packing gland. The packing head above the cover is provided with a packing thread section matched with the bonnet thread at the lower end, a compensation groove is arranged on the corresponding packing head above the packing gland, and the packing spring is located in the compensation groove and compressed on the packing head between the part and the packing gland.
CN202011461286.5A 2020-12-11 2020-12-11 Plug valve easy to adjust and reliable in sealing Pending CN112483674A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115560092A (en) * 2022-11-02 2023-01-03 山东龙飞机电设备有限公司 Compensation type wedge-shaped top sealing plug valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201437850U (en) * 2009-07-23 2010-04-14 浙江维都利阀门制造有限公司 Harsh working condition resisting type special alloy plug valve
CN203927044U (en) * 2014-06-06 2014-11-05 施瑞德阀门(厦门)有限公司 Corrugated pipe cock
CN205207734U (en) * 2015-12-17 2016-05-04 凯喜姆阀门有限公司 Anti cold flows and lasts sealed plug valve
CN110848408A (en) * 2019-11-29 2020-02-28 浙江福瑞科流控机械有限公司 Compensable sealing plug valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201437850U (en) * 2009-07-23 2010-04-14 浙江维都利阀门制造有限公司 Harsh working condition resisting type special alloy plug valve
CN203927044U (en) * 2014-06-06 2014-11-05 施瑞德阀门(厦门)有限公司 Corrugated pipe cock
CN205207734U (en) * 2015-12-17 2016-05-04 凯喜姆阀门有限公司 Anti cold flows and lasts sealed plug valve
CN110848408A (en) * 2019-11-29 2020-02-28 浙江福瑞科流控机械有限公司 Compensable sealing plug valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115560092A (en) * 2022-11-02 2023-01-03 山东龙飞机电设备有限公司 Compensation type wedge-shaped top sealing plug valve

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