CN205918922U - Case subassembly on gate valve - Google Patents

Abstract

The utility model relates to the field of valves, a case subassembly on gate valve, the case subassembly sets up in the valve pocket between medium flow inlet channel and medium play runner, the case subassembly includes wedge block, rise piece, two sealed dishes and two leading trucks, two mutual parallel arrangement of sealed dish, the leading truck sets up on the valve body of sealed dish top, constitutes the guide rail who is used for the sealed dish of direction between two leading trucks, wedge block connects in valve rod inner end portion, sets up the positioning shaft hole who parallels with the medium runner on the sealed dish, is provided with the location axle on the inner side of sealed dish, and the location axle sets up in positioning shaft hole, the piece that rises is in between wedge block and the sealed dish, and the lower tip and the inner facial features of valve body of the piece that rises are supported, and the piece that rises is hung and is established wedge block is last, and the wedge block and a cant tie that rises offset. This case subassembly adopts carves shape extruded principle, promotes gate valve sealing performance, extension gate valve life.

Description

A kind of core assembly on gate valve

Technical field

This utility model is related to valve field, the core assembly on more particularly, to a kind of gate valve.

Background technology

Gate valve is presently the most one of important valve species, is belonging to a kind of stop valve class, effect be to turn on or Block the medium in pipeline, have of completely closed and fully open two kinds of working conditions, it is widely used in liquid, gas, dust Circulation and cut-off in medium.But, the following weak point of gate valve in the market: gate valve is forced seal structure, passes through Gate valve is sealed with the extruding realization of valve seat, but flashboard and valve base chamber easily stuck phenomenon because of thermal expansion, cause valve to beat not Open.And in the case of relatively rapid keying, the sealing contact surface of flashboard and valve seat easily because abrasion in dynamic friction, greatly Shorten greatly the service life of valve.

Content of the invention

In order to solve the above problems, the purpose of this utility model is to provide the core assembly on a kind of gate valve, this valve element Assembly adopts the principle of wedge extruding, lifts Gate-valve sealing performance, extends gate valve service life.

In order to realize above-mentioned purpose, this utility model employs following technical scheme:

A kind of core assembly on gate valve, described core assembly is arranged on that medium enters runner and medium goes out the valve between runner Intracavity it is characterised in that: described core assembly includes wedge type block, the block that rises, two pieces of seal discs and two leading trucks, two pieces of seal discs Arranged in parallel and be respectively at that medium enters runner and medium goes out on the interior end opening of runner；Described leading truck is arranged on sealing On valve body above disk, between two leading trucks, constitute the guide rail for pilot seal disk；Described wedge type block is connected to valve On bar inner end, seal disc is offered the positioning shaft hole paralleled with medium runner, the interior end side surface of seal disc is provided with Locating shaft, the locating shaft of seal disc is arranged in the positioning shaft hole of wedge type block；The described block that rises is between wedge type block and seal disc, The bottom of block of rising is offseted with the inner face of valve body, and the block that rises is hung on described wedge type block, wedge type block and the block inclined-plane cooperation phase that rises Support.

This utility model adopts technique scheme, and the core assembly in this gate valve adopts the run-in index of two pieces of seal discs close Seal structure, that is, two pieces of seal discs are parallel with sealing surface；During progressively closing under core assembly is driven by valve rod, valve rod end Wedge type block in portion tilts extruding and rises block, and the block that makes to rise moves parallel to medium runner direction, and makes to rise by block outwardly against close simultaneously Closing disk, makes seal disc be sealed on sealing surface, realizes valve element and closes, using the principle of wedge extruding during being somebody's turn to do, makes seal disc With the sealing surface tensioner cooperation of valve body, lift Gate-valve sealing performance.The process progressively opened under core assembly is driven by valve rod In, wedge type block, rise by block and seal disc rises under the drive of valve rod, the guide rail guide spool constituting between two leading trucks Assembly；During rising, wedge type block, for extruding force forfeiture, seal disc and the sealing surface no Relative friction of the block that rises, reduces The keying moment of valve, reduces abrasion simultaneously, increases the service life of valve.

Brief description

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of core assembly.

Specific embodiment

Below in conjunction with the accompanying drawings, preferred embodiment of the present utility model is described in further detail.

A kind of gate valve as shown in Figure 1 and Figure 2, including valve body 1, and is arranged on the valve gap 2 on valve body 1, and is arranged on Core assembly 3 in the valve pocket of described valve body 1, and the valve rod 4 of core assembly 3 described in drive connection, and drive connection institute State the operating mechanism of valve rod 4.Described valve body 1 is provided with the medium runner communicating respectively with its internal valve pocket, and medium runner includes Medium enters runner 11 and medium goes out runner 12, and the flow diameter that medium enters runner 11 with medium goes out runner 12 is identical and is in same On axis, medium enters the medium entrance end of runner 11, and medium goes out to be equipped with flange disk body on the media outlet end of runner 12 13, flange disk body 13 and valve body 1 integrally connected casting, gate valve is used for being connected to medium pipeline by flange disk body 13.

Described valve gap 2 is fastened on valve body 1, the upper end open of valve gap 2 closeding valve cavity.Described valve rod 4 positioning wears On valve gap 2, valve rod 4 bottom is in valve pocket, is provided with packing seal assembly, packing seal assembly bag between valve rod 4 and valve gap 2 Include filler 41, and cover 42 for positioning the filler of described filler, and for positioning the hold-down grid 43 of described filler set 42. Filler in packing seal assembly is used for ensureing that the sealing between valve rod 4 and valve gap 2, filler set 42 and hold-down grid 43 are used for Described filler is positioned, so that filler is fixed, prevent filler from producing pine in the friction process long-term with described valve rod 4 Dynamic；Thus lifting its sealing effectiveness, so that gate valve is difficult to produce medium leakage and permeate, ensureing that valve body 1 moves, extend valve body 1 Service life.

Described valve gap 2 is fixedly arranged above support 51, and valve rod 4 top is positioned inside support 51, is provided with use above support 51 In the protective cap 52 protecting described valve rod 4 end.Described operating mechanism includes operating handwheel 53, and coaxial with operation handwheel 53 The umbrella tooth 54 connecting, and it is set in the valve stem nut 55 on valve rod 4 upper end.Described valve stem nut 55 outer end is nibbled with umbrella tooth 54 Close and connect, the inner and described valve rod 4 of valve stem nut 55 is meshed.In said structure, the valve rod 4 of gate valve connects described core assembly 3, valve rod 4 described in operating mechanism drive connection.Wherein, operating mechanism drives umbrella tooth 54 to rotate using operation handwheel 53, umbrella tooth 54 With valve stem nut 55 engaged transmission being set on valve rod 4, between valve stem nut 55 and valve rod 4, constitute screw body, valve rod spiral shell During female 55 rotate, valve rod 4 axial movement drives core assembly 3 to lift, and realizes the control to medium runner.Above-mentioned driving Structure is simple, easy to operate and be easy to regular maintenance.

Described core assembly 3 is arranged on that medium enters runner 11 and medium goes out in the valve pocket between runner 12, and core assembly 3 wraps Include wedge type block 31, rise 32, two pieces of seal discs 33 of block and two leading trucks 34, two pieces of seal discs 33 are arranged in parallel and locate respectively Enter on the interior end opening that runner 11 and medium go out runner 12 in medium.Described leading truck 34 is arranged on the valve body of seal disc 33 top On 1, between two leading trucks 34, constitute the guide rail for pilot seal disk 33.Described valve rod 4 inner end be in two pieces close Between closing disk 33, wedge type block 31 is connected on valve rod 4 inner end, and seal disc 33 is offered the positioning paralleled with medium runner Axis hole 35, the interior end side surface of seal disc 33 is provided with locating shaft 36, and the locating shaft 36 of seal disc 33 is arranged on wedge type block 31 In positioning shaft hole 35.The described block 32 that rises is between wedge type block 31 and seal disc 33, the bottom of the block 32 that rises and the inner of valve body 1 Face offsets, and the block 32 that rises is hung on described wedge type block 31, and wedge type block 31 is offseted with block 32 inclined-plane cooperation of rising.In said structure, lock The core assembly 3 of valve adopts the run-in index sealing structure of two pieces of seal discs 33, and that is, two pieces of seal discs 33 are parallel with sealing surface.In valve Core assembly 3 is driven down by valve rod 4 during progressively closing, and wedge type block 31 on valve rod 4 end tilts extruding and rises block 32, makes to rise Block 32 moves parallel to medium runner direction, and makes to rise by block 32 outwardly against seal disc 33 simultaneously, so that seal disc 33 is sealed in close On front cover, realize valve element and close, using the principle of wedge extruding during being somebody's turn to do, make the sealing surface tensioner of seal disc 33 and valve body 1 Cooperation, lifts Gate-valve sealing performance.During progressively opening under core assembly 3 is driven by valve rod 4, wedge type block 31, rise block 32 and seal disc 33 rise under the drive of valve rod 4, between two leading trucks 34 constitute guide rail guide spool assembly 3. During rising, wedge type block 31, for extruding force forfeiture, seal disc 33 and the sealing surface no Relative friction of the block 32 that rises, reduces The keying moment of valve, reduces abrasion simultaneously, increases the service life of valve.

It should be appreciated that above-mentioned specific embodiment of the present utility model is used only for exemplary illustration or explains this reality With new principle, and do not constitute to restriction of the present utility model.Therefore, without departing from spirit and scope of the present utility model In the case of any modification, equivalent substitution and improvement done etc., should be included within protection domain of the present utility model.Additionally, This utility model claims are intended to fall into scope and border or this scope and border Whole changes in equivalents and modification.

Claims (1)

1. the core assembly on a kind of gate valve, described core assembly is arranged on that medium enters runner and medium goes out the valve pocket between runner Interior it is characterised in that: described core assembly includes wedge type block, the block that rises, two pieces of seal discs and two leading trucks, two pieces of seal disc phases Mutually it be arranged and is respectively at that medium enters runner and medium goes out on the interior end opening of runner in parallel；Described leading truck is arranged on seal disc On the valve body of top, between two leading trucks, constitute the guide rail for pilot seal disk；Described wedge type block is connected to valve rod On inner end, seal disc is offered the positioning shaft hole paralleled with medium runner, it is fixed that the interior end side surface of seal disc is provided with Position axle, the locating shaft of seal disc is arranged in the positioning shaft hole of wedge type block；The described block that rises is between wedge type block and seal disc, rises The bottom of block is offseted with the inner face of valve body, and the block that rises is hung on described wedge type block, and wedge type block is offseted with block inclined-plane cooperation of rising.