CN205715699U - A kind of emergency cut-off stop valve - Google Patents
A kind of emergency cut-off stop valve Download PDFInfo
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- CN205715699U CN205715699U CN201620262866.4U CN201620262866U CN205715699U CN 205715699 U CN205715699 U CN 205715699U CN 201620262866 U CN201620262866 U CN 201620262866U CN 205715699 U CN205715699 U CN 205715699U
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- watertight padding
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Abstract
The utility model discloses a kind of emergency cut-off stop valve, it is characterized by: the core assembly of emergency cut-off stop valve includes valve rod, flap and airtight and watertight padding part；Flap is fixedly and coaxially connected on the lower end being arranged on valve rod；Taper thread is distributed on the periphery wall of flap；Airtight and watertight padding part is provided with center through hole；Airtight and watertight padding part is made of plastics, and is generated the female thread matched with this taper thread accordingly during use in the center through hole of airtight and watertight padding part by the taper thread of flap.Emergency cut-off stop valve structure of the present utility model is simple, easy for installation, only airtight and watertight padding part first need to be fixed in the mounting groove of stop valve during use, the female thread on airtight and watertight padding part is generated by the taper thread of corresponding flap, without the concern for orientation problem, and coordinate reliable.
Description
Technical field
This utility model relates to valve field, is specifically applied to various gas-liquid tank, is particularly well-suited to the high pressure fluid reservoir such as chlorine, liquefied gas, and the emergency cut-off stop valve on highly pressurised liquid or gas transmission pipeline.
Background technology
Stop valve, is also pipe valve, is one of most popular a kind of valve, and it is the most very popular, be due to during opening and closing between sealing surface frictional force little, relatively durable, Lift is little, easy to manufacture, easy to maintenance, it is applicable not only to mesolow, and is applicable to high pressure.At present, stop valve generally includes valve body, flap and for driving flap to do the valve rod moved along a straight line up and down, the isolation inwall with opening it is provided with in valve body, isolation inwall both sides respectively constitute snout cavity and outlet plenum, snout cavity and outlet plenum are conducted by opening, valve rod includes and is placed in the built-in portion of valve inner and is placed on the external portion outside valve body, the other end in the most external portion of the built-in portion of described valve body is connected with flap, and described flap is placed at the conducting of snout cavity and outlet plenum and can arrange formation with isolation inwall conflict and is tightly connected.Flap is all to use plane to plane with the sealing means of isolation inwall, or use the conical surface sealing structure to the conical surface, even across remaining a need for after numerical control polish grinding, traditional flat seal ensures that the sealing pair of valve seat flap has good surface roughness, and need the highest sealing force to ensure that the microcosmic gap that the seal pressure of sealing surface is filled up between sealing pair by sealing surface elastic deformation makes valve seal realize.That is, such sealing surface structure, the sealing property that easily there is sealing surface is the most up to standard, medium in valve body goes out from the clearance portion bit stream of sealing surface, if being intended to so that sealing property is strong, requirement on machining accuracy is the highest, needs valve base sealing portion and flap sealing are carried out high-precision cooperation, complex process.And remain in the impurity on sealing surface after using and also can affect sealing effectiveness, cause sealing effectiveness to decline, service life is greatly shortened.The sealing structure of the employing thread forms also having, but this structure need to be directed at screw thread and carry out location and installation and fix, location difficulty, careless slightly to may result in sealing destructurized.
Utility model content
The purpose of this utility model is to provide a kind of simple in construction, and easy for installation, sealing effectiveness is preferable, the emergency cut-off stop valve being greatly improved service life.
The basic technical scheme realizing this utility model purpose emergency cut-off stop valve is: emergency cut-off stop valve includes core assembly and emergency shutoff device.Core assembly includes valve rod, flap and airtight and watertight padding part.Valve rod upper end is provided with connecting portion, and connecting portion connects for fixing with corresponding handwheel or spanner.Valve rod is provided with external thread section, and external thread section is positioned at the lower section of connecting portion.The bottom of valve rod is column sealed connecting portion.Flap is fixedly and coaxially connected on the lower end being arranged on valve rod.Taper thread is distributed on the periphery wall of flap.The external screw thread pitch of the external thread section on described valve rod is equal with the pitch of the taper thread on described flap.Airtight and watertight padding part is provided with center through hole.Airtight and watertight padding part is made up of plastics or soft metal.In the center through hole of airtight and watertight padding part, generated the female thread matched accordingly with this taper thread by the taper thread of flap during use.
The remainder of emergency cut-off stop valve includes: the 3rd valve pocket, and the orthogonal adjacent two side of the 3rd valve pocket is respectively equipped with triple feed inlet joint and the 3rd outlet connection.In 3rd outlet of triple feed inlet joint extends to the 3rd valve pocket and arrange upward.3rd exit of triple feed inlet joint is provided with the 3rd fitting recess, and the inwall of the 3rd fitting recess is circumferentially with, along it, the 3rd groove that opening is inside.The airtight and watertight padding part of core assembly is fixedly installed in the 3rd fitting recess.When for the first time flap being screwed on airtight and watertight padding part, in the center through hole of airtight and watertight padding part, the female thread matched accordingly is generated with this taper thread, simultaneously because the appropriate section of the airtight and watertight padding part that is squeezed can be extruded in the 3rd groove of the 3rd fitting recess by the taper thread of flap.
The upper end of the 3rd valve pocket seals and is provided with the 3rd valve gap.The external thread section of the valve rod of core assembly matches with the corresponding female thread in top of described 3rd valve gap, and the column sealed connecting portion of valve rod is coordinated by the 3rd sealing member and the 3rd valve bonnet seal.
Emergency shutoff device is fixedly installed on triple feed inlet joint, is used in emergency circumstances shutting off the passage of the 3rd valve pocket.
Technical scheme based on above-mentioned basic technical scheme is: be fixedly connected with the 3rd handwheel on the upper end connecting portion of valve rod.
Technical scheme based on above-mentioned basic technical scheme is: be provided with spring shaft fixed pipe support in triple feed inlet joint, is cannula portion in the middle part of spring shaft fixed pipe support, and cannula portion is provided with and runs through its upper and lower through hole.Cannula portion is fixedly installed in triple feed inlet joint by the four articles of dowel verticals arranged along its circumference angle at equal intervals.The lower surface of triple feed inlet joint is provided with the seal projection portion of annular.
Emergency shutoff device includes valve seat.Valve base sealing is fixedly installed on triple feed inlet joint bottom.Valve seat and is provided with its inside and outside import through on base plate in its circumferential side wall.Spring shaft is fixed pipe and is arranged on spring shaft fixed pipe support, and spring shaft is slidably arranged in spring shaft and fixes in pipe.Spring shaft lower end is provided with sealing gasket friction top.Sealing gasket friction top is fixing with gasket base to be connected, and the compacted lid of sealing gasket and gasket base are fixedly clamped, and during use, the seal projection portion of the lower surface of sealing gasket and triple feed inlet joint forms contact and seals structure.It is provided with compression spring between gasket base and valve seat base plate.On triple feed inlet joint, rotary seal is provided with shifting block axle.The one end of the shifting block axle being positioned in triple feed inlet joint is provided with shifting block.Shifting block is positioned on spring shaft upper end, and under stop valve normal operating conditions, spring shaft is pushed up downwards by shifting block, makes the seal projection portion of the lower surface of sealing gasket and triple feed inlet joint depart from, forms corresponding passage.Power set are fixedly installed on outside the 3rd valve pocket.Power set drive the one end of the shifting block axle being positioned at outside triple feed inlet joint to make shifting block axle rotate, thus drive shifting block to rotate.
Technical scheme based on above-mentioned each appropriate technical solution is: the thickness of the airtight and watertight padding part of described core assembly is not less than the axial height of described taper thread.
Technical scheme based on above-mentioned each appropriate technical solution is: the depth of thread of the taper thread of described core assembly from bottom to top gradually becomes shallower as.
Technical scheme based on above-mentioned each appropriate technical solution is: the end face of the flap of described core assembly is provided with the circle or annular cover plate portion being distributed with this flap one and concentricity axle.The bottom edge of ceiling plate portion is suitable to cover in the upper end of described airtight and watertight padding part, forms contact and seals structure.
Technical scheme based on above-mentioned each appropriate technical solution is: the screw thread on the taper thread of described core assembly is as single thread or many screw threads of uniform pitch.
This utility model has a positive effect: the core assembly simple in construction of (1) emergency cut-off of the present utility model stop valve, easy for installation, only airtight and watertight padding part first need to be fixed in the mounting groove of corresponding stop valve during use, female thread on airtight and watertight padding part is generated by the taper thread of corresponding flap, without the concern for orientation problem, and coordinate reliable.The airtight and watertight padding part of core assembly of the present utility model and the material of flap can select accordingly, as long as flap can attack airtight and watertight padding part certainly, producing the screw thread matched accordingly on airtight and watertight padding part and to play sealing function the most permissible, therefore the selection of the material of airtight and watertight padding part can also carry out other selections adapted according to the material of flap in addition to plastics and soft metal.
(2) when the core assembly of emergency cut-off stop valve of the present utility model uses, valve rod is driven to rotate by corresponding handwheel or spanner, to drive flap to screw in airtight and watertight padding part, make the taper thread on flap seal with the female thread of airtight and watertight padding part and coordinate, and airtight and watertight padding part is compressed.Owing to airtight and watertight padding part is compacted and coordinates with the taper thread sealing of flap, and thrust is the biggest, and the pressure that this valve can bear is the biggest；This valve resistance simultaneously has basal area relatively big (for the periphery wall of flap), opening and closing feature light and handy, easily manipulation.Even if there is impurity on the taper thread of the center through hole inwall of airtight and watertight padding part or flap, this impurity can be ground rejecting by described taper thread easily or be extruded in airtight and watertight padding part form sealing surface, does not affect its sealing, is greatly prolonged service life.When there is relatively lossy in airtight and watertight padding part, only need to change airtight and watertight padding part in time can be continuing with, therefore have simple in construction, overlong service life, maintenance cost is cheap and is suitable to the feature avoiding leaking, this valve is particularly well-suited to the high pressure fluid reservoir such as chlorine, liquefied gas, and on highly pressurised liquid or gas transmission pipeline, and can use as vertical or horizontal valve body.
(3) flap of the core assembly of emergency cut-off stop valve of the present utility model is provided with ceiling plate portion, this ceiling plate portion also forms corresponding face and contacts sealing structure with the upper surface of airtight and watertight padding part, even if the thread seal of airtight and watertight padding part nor affects on its sealing effectiveness after being damaged, not only use relatively reliable, and service life is further enhanced.
(4) the external screw thread pitch of the external thread section of the valve rod of the core assembly of emergency cut-off stop valve of the present utility model is equal with the pitch of the taper thread on described flap, to realize the axial displacement of the synchronization of valve rod and flap, prevent from accelerating the loss of airtight and watertight padding part because the displacement of valve rod and flap is asynchronous.
(5) double thread that screw thread is single thread or uniform pitch on the taper thread of the core assembly of emergency cut-off stop valve of the present utility model, with the thread pitch on the external thread section of described valve rod bigger time, screw thread on taper thread uses the double thread of uniform pitch, otherwise, then use single thread, can fully ensure that sealing effectiveness.
(6) core assembly of emergency cut-off stop valve of the present utility model is when screwing flap on airtight and watertight padding part for the first time, in the center through hole of airtight and watertight padding part, the female thread matched accordingly is generated with this taper thread by the taper thread of flap, simultaneously because be squeezed, the appropriate section of airtight and watertight padding part can be extruded in the groove of fitting recess, the groove of this fitting recess makes airtight and watertight padding part have corresponding extending space, not only contribute to flap screws installation, the appropriate section of the airtight and watertight padding part being simultaneously extruded in the groove of fitting recess makes to form interlocking between airtight and watertight padding part and fitting recess and coordinates, coordinate more solid and reliable, but also formed and seal structure accordingly, sealing reliability between airtight and watertight padding part and fitting recess is also improved.
(7) the core assembly simple in construction that emergency cut-off stop valve of the present utility model uses, easy for installation, only airtight and watertight padding part first need to be fixed in mounting groove during use, female thread on airtight and watertight padding part is generated by the taper thread of corresponding flap, without the concern for orientation problem, and coordinate reliable.The service life of stop valve has obtained great lifting.When for the first time flap being screwed on airtight and watertight padding part, in the center through hole of airtight and watertight padding part, the female thread matched accordingly is generated with this taper thread by the taper thread of flap, simultaneously because be squeezed, the appropriate section of airtight and watertight padding part can be extruded in the groove of fitting recess, the groove of this fitting recess makes airtight and watertight padding part have corresponding extending space, not only contribute to flap screws installation, the appropriate section of the airtight and watertight padding part being simultaneously extruded in the groove of fitting recess makes to form interlocking between airtight and watertight padding part and fitting recess and coordinates, coordinate more solid and reliable, but also formed and seal structure accordingly, sealing reliability between airtight and watertight padding part and fitting recess is also improved.
(8) emergency cut-off stop valve of the present utility model is provided with emergency shutoff device, in emergency circumstances cutting off, further increases the safety of pipeline.
Accompanying drawing explanation
Fig. 1 is the structural representation of the core assembly of emergency cut-off stop valve of the present utility model；
Structural representation when Fig. 2 is the flap of the core assembly of emergency cut-off stop valve of the present utility model and airtight and watertight padding part matches；
Fig. 3 is the structural representation of a kind of emergency cut-off stop valve of the present utility model；
Fig. 4 is the schematic diagram when the left anterior-superior part of Fig. 3 is observed, and wherein handwheel is not drawn into；
Fig. 5 is the left view schematic diagram of Fig. 4；
Fig. 6 is the A-A cross-sectional schematic in Fig. 5, and wherein handwheel is not drawn into.
Labelling in above-mentioned accompanying drawing is as follows:
Core assembly 1,
Valve rod 1-1, connecting portion 1-1a, external thread section 1-1b, column sealed connecting portion 1-1c,
Flap 1-2, taper thread 1-2a, ceiling plate portion 1-2b,
Airtight and watertight padding part 1-3,
Emergency cut-off stop valve 4, emergency shutoff device 4a, valve seat 4a-1, import 4a-1-1, spring shaft fixes pipe 4a-2, spring shaft 4a-3, sealing gasket friction top 4a-4, gasket base 4a-5, sealing gasket 4a-6, compression spring 4a-7, shifting block axle 4a-8, shifting block 4a-9, 3rd valve pocket 4-1, triple feed inlet joint 4-2, spring shaft fixed pipe support 4-2-1, cannula portion 4-2-1a, seal projection portion 4-2-2, 3rd outlet connection 4-3, outlet 4-4, 3rd fitting recess 4-4-1, 3rd groove 4-4-1a, 3rd valve gap 4-5, 3rd sealing member 4-6, 3rd clamping cap 4-7, 3rd handwheel 4-8.
Detailed description of the invention
The description in orientation of the present utility model is carried out according to the orientation shown in Fig. 1, namely the direction up and down shown in Fig. 1 is the direction up and down of description, and a side of court of Fig. 1 institute is front, and the side deviating from Fig. 1 is rear.
(embodiment 1)
Seeing Fig. 1 to Fig. 6, the emergency cut-off stop valve 4 of the present embodiment includes that core assembly 1 and emergency shutoff device 4a, described core assembly 1 include valve rod 1-1, flap 1-2 and airtight and watertight padding part 1-3.
See that Fig. 1 and Fig. 2, valve rod 1-1 upper end is provided with connecting portion 1-1a, connecting portion 1-1a and connects for fixing with corresponding handwheel or spanner, thus control valve rod 1-1 by this handwheel or spanner and rotate.Valve rod 1-1 is provided with external thread section 1-1b, external thread section 1-1b and is positioned at the lower section of connecting portion 1-1a, and the length of external thread section 1-1b can determine according to actual needs.The bottom of valve rod 1-1 is column sealed connecting portion 1-1c.Flap 1-2 is fixedly and coaxially connected on the lower end being arranged on valve rod 1-1.Taper thread 1-2a is distributed on the periphery wall of flap 1-2.The external screw thread pitch of the external thread section 1-1b on described valve rod 1-1 is equal with the pitch of the taper thread 1-2a on described flap 1-2, to realize the axial displacement of the synchronization of valve rod 1-1 and flap 1-2.The double thread that screw thread is single thread or uniform pitch on described taper thread 1-2a, with the thread pitch on the external thread section 1-1b of described valve rod 1-1 bigger time, screw thread on taper thread 1-2a uses the double thread of uniform pitch, otherwise, then use single thread.The end face of described flap 1-2 is provided with the circle or annular cover plate portion 1-2b being distributed with this flap 1-2 one and concentricity axle.
See that Fig. 1 and Fig. 2, airtight and watertight padding part 1-3 are provided with center through hole 1-3a.Airtight and watertight padding part 1-3 is made of plastics, and the present embodiment uses polytetrafluoroethylmaterial material to make.Airtight and watertight padding part 1-3 also can have and is made up of soft metal, such as lead.The airtight and watertight padding part of core assembly and the material of flap can select accordingly, as long as flap can attack airtight and watertight padding part certainly, producing the screw thread matched accordingly on airtight and watertight padding part and to play sealing function the most permissible, therefore the selection of the material of airtight and watertight padding part can also carry out other selections adapted according to the material of flap in addition to plastics and soft metal.In center through hole 1-3a of airtight and watertight padding part 1-3, generated the female thread matched accordingly with this taper thread 1-2a by the taper thread 1-2a of flap 1-2 during use.The depth of thread of taper thread 1-2a from bottom to top gradually becomes shallower as.To guarantee in the described downward displacement process of flap 1-2, flap 1-2 and described airtight and watertight padding part 1-3 is made fully to compress and realize threaded sealing fit.The thickness of described airtight and watertight padding part 1-3 is not less than the axial height of described taper thread 1-2a, so that the taper thread 1-2a of flap 1-2 is suitable to fully and the contact internal walls of airtight and watertight padding part 1-3, compresses and realizes threaded sealing fit.
See Fig. 1 and Fig. 2, when described flap 1-2 threaded engagement is in the center through hole of described airtight and watertight padding part 1-3, the bottom edge of this ceiling plate portion 1-2b is suitable to cover in the upper end of described airtight and watertight padding part 1-3, with crush seal packing element 1-3, improving the reliability of the sealing property between described flap 1-2 and airtight and watertight padding part 1-3 and threaded engagement, the bottom surface of ceiling plate portion 1-2b forms face with the upper end of airtight and watertight padding part 1-3 and contacts sealing structure simultaneously.
See that Fig. 3 to Fig. 6, emergency cut-off stop valve 4 remainder also include: the 3rd valve pocket 4-1, the orthogonal adjacent two side of the 3rd valve pocket 4-1 is respectively equipped with triple feed inlet joint 4-2 and the 3rd outlet connection 4-3；In the 3rd outlet 4-4 of triple feed inlet joint 4-2 extends to the 3rd valve pocket 4-1 and arrange upward；Being provided with spring shaft fixed pipe support 4-2-1 in triple feed inlet joint 4-2, be cannula portion 4-2-1a in the middle part of spring shaft fixed pipe support 4-2-1, cannula portion 4-2-1a is provided with and runs through its upper and lower through hole.Cannula portion 4-2-1a is fixedly installed in triple feed inlet joint 4-2 by the four articles of dowel verticals arranged along its circumference angle at equal intervals.The lower surface of triple feed inlet joint 4-2 is provided with seal projection portion 4-2-2 of annular.It is provided with the 3rd fitting recess 4-4-1 at the 3rd outlet 4-4 of triple feed inlet joint 4-2, the airtight and watertight padding part 1-3 of the core assembly 1 described in embodiment 1 screws and is fixedly installed in the 3rd fitting recess 4-4-1, and the inwall of the 3rd fitting recess 4-4-1 is circumferentially with, along it, the 3rd groove 4-4-1a that opening is inside.Described airtight and watertight padding part 1-3 can use threaded engagement or employing to be bolted in the 3rd fitting recess 4-4-1 when using, or described airtight and watertight padding part 1-3 direct pouring is in the 3rd fitting recess 4-4-1, the cross section of described 3rd fitting recess 4-4-1 is polygon or ellipse, to prevent flap 1-2 and airtight and watertight padding part 1-3 from occurring the situation of synchronous rotary during threaded engagement.Airtight and watertight padding part 1-3 of the present utility model is provided with external screw thread, and during use, threaded engagement is in the 3rd fitting recess 4-4-1.When for the first time flap 1-2 being screwed on airtight and watertight padding part 1-3, in center through hole 1-3a of airtight and watertight padding part 1-3, the female thread matched accordingly is generated with this taper thread 1-2a, simultaneously because the appropriate section of the airtight and watertight padding part 1-3 that is squeezed can be extruded in the 3rd groove 4-4-1a of the 3rd fitting recess 4-4-1 by the taper thread 1-2a of flap 1-2.Emergency shutoff device 4a is fixedly installed on triple feed inlet joint 4-2, is used in emergency circumstances shutting off the passage of the 3rd valve pocket 4-1.Emergency shutoff device 4a includes valve seat 4a-1.Valve seat 4a-1 seals and is fixedly installed on triple feed inlet joint 4-2 bottom.Valve seat 4a-1 and is provided with its inside and outside import 4a-1-1 through on base plate in its circumferential side wall.Spring shaft is fixed pipe 4a-2 and is arranged on spring shaft fixed pipe support 4-2-1, and spring shaft 4a-3 is slidably arranged in spring shaft and fixes in pipe 4a-2.Spring shaft 4a-3 lower end is provided with sealing gasket friction top 4a-4.Sealing gasket friction top 4a-4 and gasket base 4a-5 is fixing to be connected, and sealing gasket 4a-6 compacted lid 4a-4 and gasket base 4a-5 is fixedly clamped, during use, seal projection portion 4-2-2 of the lower surface of sealing gasket 4a-6 and triple feed inlet joint 4-2 forms contact and seals structure.It is provided with compression spring 4a-7 between gasket base 4a-5 and valve seat 4a-1 base plate.When emergency cut-off function enables, sealing gasket 4a-6 is pushed up seal projection portion 4-2-2 to the lower surface of triple feed inlet joint 4-2 by compression spring 4a-7 so that it is is in close contact with seal projection portion 4-2-2, thus cuts off.On triple feed inlet joint 4-2, rotary seal is provided with shifting block axle 4a-8.The one end of the shifting block axle 4a-8 being positioned in triple feed inlet joint 4-2 is provided with shifting block 4a-9.Shifting block 4a-9 is positioned on spring shaft 4a-3 upper end, and under stop valve normal operating conditions, spring shaft 4a-3 is pushed up downwards by shifting block 4a-9, makes seal projection portion 4-2-2 of the lower surface of sealing gasket 4a-6 and triple feed inlet joint 4-2 depart from, forms corresponding passage.Power set (being not drawn in Fig. 3) are fixedly installed on outside the 3rd valve pocket 4-1.Described power set can be cylinder or hydraulic cylinder or drive motor.Power set drive the one end of the shifting block axle 4a-8 being positioned at outside triple feed inlet joint 4-2 to make shifting block axle 4a-8 rotate, thus drive shifting block 4a-9 to rotate.When emergency cut-off function enables, power set drive shifting block axle 4a-8 to rotate, and make shifting block 4a-9 be rotated up, and sealing gasket 4a-6 is pushed up seal projection portion 4-2-2 to the lower surface of triple feed inlet joint 4-2 by compression spring 4a-7, make it be in close contact with seal projection portion 4-2-2, thus cut off.The upper end of the 3rd valve pocket 4-1 seals and is provided with the 3rd valve gap 4-5；The external thread section 1-1b of the valve rod 1-1 of the core assembly 1 described in embodiment 1 matches with the corresponding female thread in top of described 3rd valve gap 4-5, and the column sealed connecting portion 1-1c of valve rod 1-1 is sealed by the 3rd sealing member 4-6 and the 3rd valve gap 4-5 and coordinates；3rd sealing member 4-6 is sealed by the 3rd clamping cap 4-7 and is fixedly installed in the 3rd valve gap 4-5.3rd clamping cap 4-7 is fixedly installed on the 3rd valve gap 4-5.It is fixedly connected with the 3rd handwheel 4-8 on the upper end connecting portion 1-1a of valve rod 1-1, valve rod 1-1 can be made to rotate by rotating the 3rd handwheel 4-8.
3rd valve pocket 4-1, the 3rd valve gap 4-5, valve rod 1-1 and flap 1-2 typically select rustless steel to make；Also dependent on requirements such as actual application scenario, anticorrosion, compressive resistances, select different materials.
Above example is the most for illustration of the utility model; rather than to restriction of the present utility model; person skilled in the relevant technique is in the case of without departing from spirit and scope of the present utility model; various conversion and change can also be made; concrete application process can also be transformed according to the inspiration of above-described embodiment, within the technical scheme of the most all equivalents all should be included into scope of patent protection of the present utility model accordingly.
Claims (7)
1. an emergency cut-off stop valve, it is characterised in that: emergency cut-off stop valve (4) includes core assembly (1) and emergency shutoff device (4a)；Core assembly (1) includes valve rod (1-1), flap (1-2) and airtight and watertight padding part (1-3)；Valve rod (1-1) upper end is provided with connecting portion (1-1a), and connecting portion (1-1a) connects for fixing with corresponding handwheel or spanner；Valve rod (1-1) is provided with external thread section (1-1b), and external thread section (1-1b) is positioned at the lower section of connecting portion (1-1a)；The bottom of valve rod (1-1) is column sealed connecting portion (1-1c)；Flap (1-2) is fixedly and coaxially connected on the lower end being arranged on valve rod (1-1)；Taper thread (1-2a) is distributed on the periphery wall of flap (1-2)；The external screw thread pitch of the external thread section (1-1b) on described valve rod (1-1) is equal with the pitch of the taper thread (1-2a) on described flap (1-2)；Airtight and watertight padding part (1-3) is provided with center through hole (1-3a)；Airtight and watertight padding part (1-3) is made up of plastics or soft metal；In the center through hole (1-3a) of airtight and watertight padding part (1-3), generated the female thread matched accordingly with this taper thread (1-2a) by the taper thread (1-2a) of flap (1-2) during use；
The remainder of emergency cut-off stop valve (4) including: the 3rd valve pocket (4-1), and the orthogonal adjacent two side of the 3rd valve pocket (4-1) is respectively equipped with triple feed inlet joint (4-2) and the 3rd outlet connection (4-3)；In 3rd outlet (4-4) of triple feed inlet joint (4-2) extends to the 3rd valve pocket (4-1) and arrange upward；The 3rd outlet (4-4) place of triple feed inlet joint (4-2) is provided with the 3rd fitting recess (4-4-1), and the inwall of the 3rd fitting recess (4-4-1) is circumferentially with, along it, the 3rd groove (4-4-1a) that opening is inside；The airtight and watertight padding part (1-3) of core assembly (1) is fixedly installed in the 3rd fitting recess (4-4-1)；For the first time flap (1-2) is screwed when airtight and watertight padding part (1-3) is upper, in the center through hole (1-3a) of airtight and watertight padding part (1-3), the female thread matched accordingly is generated with this taper thread (1-2a), simultaneously because the appropriate section of the airtight and watertight padding part (1-3) that is squeezed can be extruded in the 3rd groove (4-4-1a) of the 3rd fitting recess (4-4-1) by the taper thread (1-2a) of flap (1-2)；
The upper end of the 3rd valve pocket (4-1) seals and is provided with the 3rd valve gap (4-5)；The external thread section (1-1b) of the valve rod (1-1) of core assembly (1) matches with the corresponding female thread in top of described 3rd valve gap (4-5), and the column sealed connecting portion (1-1c) of valve rod (1-1) is coordinated with the 3rd valve gap (4-5) sealing by the 3rd sealing member (4-6)；
Emergency shutoff device (4a) is fixedly installed on triple feed inlet joint (4-2), is used in emergency circumstances shutting off the passage of the 3rd valve pocket (4-1).
Emergency cut-off stop valve the most according to claim 1, it is characterised in that: it is fixedly connected with the 3rd handwheel (4-8) on the upper end connecting portion (1-1a) of valve rod (1-1).
Emergency cut-off stop valve the most according to claim 1, it is characterized in that: triple feed inlet joint (4-2) is provided with spring shaft fixed pipe support (4-2-1), spring shaft fixed pipe support (4-2-1) middle part is cannula portion (4-2-1a), and cannula portion (4-2-1a) is provided with and runs through its upper and lower through hole；Cannula portion (4-2-1a) is fixedly installed in triple feed inlet joint (4-2) by the four articles of dowel verticals arranged along its circumference angle at equal intervals；The lower surface of triple feed inlet joint (4-2) is provided with the seal projection portion (4-2-2) of annular；
Emergency shutoff device (4a) includes valve seat (4a-1)；Valve seat (4a-1) seals and is fixedly installed on triple feed inlet joint (4-2) bottom；Valve seat (4a-1) and is provided with its inside and outside import (4a-1-1) through on base plate in its circumferential side wall；The fixing pipe (4a-2) of spring shaft is arranged on spring shaft fixed pipe support (4-2-1), and spring shaft (4a-3) is slidably arranged in the fixing pipe (4a-2) of spring shaft；Spring shaft (4a-3) lower end is provided with sealing gasket friction top (4a-4)；Sealing gasket friction top (4a-4) is fixing with gasket base (4a-5) to be connected, and sealing gasket (4a-6) compacted lid (4a-4) and gasket base (4a-5) are fixedly clamped, during use, sealing gasket (4a-6) is formed with the seal projection portion (4-2-2) of the lower surface of triple feed inlet joint (4-2) and contacts sealing structure；Compression spring (4a-7) it is provided with between gasket base (4a-5) and valve seat (4a-1) base plate；The upper rotary seal of triple feed inlet joint (4-2) is provided with shifting block axle (4a-8)；The one end of the shifting block axle (4a-8) being positioned in triple feed inlet joint (4-2) is provided with shifting block (4a-9)；Shifting block (4a-9) is positioned on spring shaft (4a-3) upper end, under stop valve normal operating conditions, spring shaft (4a-3) is pushed up downwards by shifting block (4a-9), make sealing gasket (4a-6) depart from the seal projection portion (4-2-2) of the lower surface of triple feed inlet joint (4-2), form corresponding passage；Power set are fixedly installed on the 3rd valve pocket (4-1) outward；Power set drive the one end being positioned at triple feed inlet joint (4-2) shifting block axle (4a-8) outward to make shifting block axle (4a-8) rotate, thus drive shifting block (4a-9) to rotate.
4. according to the emergency cut-off stop valve one of claims 1 to 3 Suo Shu, it is characterised in that: the thickness of the airtight and watertight padding part (1-3) of described core assembly (1) is not less than the axial height of described taper thread (1-2a).
5. according to the emergency cut-off stop valve one of claims 1 to 3 Suo Shu, it is characterised in that: the depth of thread of the taper thread (1-2a) of described core assembly (1) from bottom to top gradually becomes shallower as.
6. according to the emergency cut-off stop valve one of claims 1 to 3 Suo Shu, it is characterised in that: the end face of the flap (1-2) of described core assembly (1) is provided with the circle or annular cover plate portion (1-2b) being distributed with this flap (1-2) one and concentricity axle；The bottom edge of ceiling plate portion (1-2b) is suitable to cover in the upper end of described airtight and watertight padding part (1-3), forms contact and seals structure.
7. according to the emergency cut-off stop valve one of claims 1 to 3 Suo Shu, it is characterised in that: the many screw threads that screw thread is single thread or uniform pitch on the taper thread (1-2a) of described core assembly (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620262866.4U CN205715699U (en) | 2016-03-31 | 2016-03-31 | A kind of emergency cut-off stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620262866.4U CN205715699U (en) | 2016-03-31 | 2016-03-31 | A kind of emergency cut-off stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205715699U true CN205715699U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620262866.4U Expired - Fee Related CN205715699U (en) | 2016-03-31 | 2016-03-31 | A kind of emergency cut-off stop valve |
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| Country | Link |
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| CN (1) | CN205715699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736713A (en) * | 2016-03-31 | 2016-07-06 | 江苏双虎环保节能设备科技有限公司 | Valve element assembly and stop valve |
-
2016
- 2016-03-31 CN CN201620262866.4U patent/CN205715699U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736713A (en) * | 2016-03-31 | 2016-07-06 | 江苏双虎环保节能设备科技有限公司 | Valve element assembly and stop valve |
| WO2017167223A1 (en) * | 2016-03-31 | 2017-10-05 | 邹岳明 | Spool assembly and shut-off valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20190331 |