Ball valve
Technical field
It the utility model is related to a kind of ball valve.
Background technology
Ball valve (ball valve should be stop valve in extra large work and ship domain), standard GB/T21465-2008《Valve art
Language》Defined in be:Opening and closing element (spheroid) is driven by valve rod, and the valve to be rotated around ball valve axis.Also it can be used for fluid
Regulation and control, wherein firmly sealing its V-type core of V-type ball valve and pile-up welding hard alloy metal seat valve between have it is very strong
Shearing force, the medium especially suitable for fibre-bearing, small solid pellet etc..And multi-pass ball valve not only can be controlled flexibly on pipeline
Interflow, shunting and the switching of flow direction of medium, while also can close any passage and two other passage is connected.
Some ball valves in present production and application can be present pressure extrusion can go out along valve rod extraction direction caused by medium
Trend, present conventional techniques be along vertical valve rod direction install one installation lid, the installation lid extrusion packing material, protect
Demonstrate,prove sealing effectiveness;Valve rod is prevented to be squeezed out by pressure medium simultaneously.
But installation lid needs to ensure extrusion packing material, while the pressure medium that valve rod receives is born, this is for installation
The performance requirement of lid is higher;The utility model proposes the attachment structure of a kind of valve rod and spheroid and valve body, installation lid is set not hold
The pressure of valve rod is acted on by medium, so as to reduce the performance requirement of valve rod, while also there is installation simply and easily effect.
Utility model content
To meet to reduce the performance requirement of installation lid, the utility model proposes a kind of ball-valve structure.
A kind of ball valve, including valve body, spheroid and valve rod, valve rod one end is provided with valve rod card bulb, in valve rod close to valve rod
Card bulb is provided with valve rod dop, and valve rod dop includes valve rod dop protuberance;Limiting section, limiting section are provided with third channel
Including limiting section inner fovea part;Valve rod dop protuberance appearance and size is less than limiting section inner fovea part size, ensures the valve rod card of valve rod
Head can be by limiting section inside, valve rod dop is passed through into limiting section;Then, valve rod is rotated along axis, make valve rod dop with
Limiting section staggers, and the other positions of valve rod dop protuberance and limiting section inner fovea part are blocked, and prevents valve rod from along valve rod axis side
To disengaging limiting section;Limiting section is passed through in valve rod dop simultaneously, and valve rod card bulb coordinates with the mounting groove on spheroid, realizes valve rod
Rotation control to spheroid.
Further, the valve body includes first passage and second channel, and the mounting structure of spheroid includes the first valve seat, the
Two valve seats, the first pre-tightening sleeve, the first fixed cover;The above-mentioned part of mounting structure is placed into installation from first passage;First will
First valve seat is placed into second channel along first passage, and the first preload ring is provided between the first valve seat and valve body;Place ball
Body, ensure that the mounting groove of spheroid towards third channel, meets by valve rod after third channel stretches into, the valve rod dop of valve rod can
Coordinate with the mounting groove on spheroid;The first pre-tightening sleeve is then placed, pretension bullet is provided between the first pre-tightening sleeve and the second valve seat
Spring;First fixed cover withstands the first pre-tightening sleeve, and the first fixed cover is fixed with valve body.
Further, in addition to installation is covered and sealing material set;In third channel, space that valve rod and limiting section surround
Sealing material set is installed, installation lid is additionally provided with and compresses sealing material set.
Further, pretension sealing material set is additionally provided between installation lid and sealing material set.
Further, in addition to mounting blocks, mounting blocks are fixed with valve body, and the installation that mounting blocks are used to install lid is fixed;Peace
Capping, by installing lid screw, installation box nut installation fixation, is installed and also set between lid screw and installation box nut with mounting blocks
It is equipped with installation lid pre-tightening sleeve.
Further, in addition to handle fixed mount and handle, the handle fixed mount are installed by handle with valve rod and fixed
Key is fixed, and handle fixed mount passes through the handle along the handle installing hole that insertion is provided with perpendicular to the direction of valve rod axis, handle
Mounting hole.
The beneficial effects of the utility model are:By valve rod and the snap fit of limiting section, reduce Jie that valve rod is born
The pressure of matter vertically, ensure that the stability of ball-valve structure;And spheroid is ensured using corresponding combination pretension fixed structure
The normal work of spheroid, add the working time of ball valve.
Brief description of the drawings
Fig. 1 is the utility model ball-valve structure schematic diagram;
Fig. 2 is valve body structure schematic diagram of the present utility model;
Fig. 3 is that valve body structure of the present utility model shows limiting section structural representation along S directions shown in Fig. 2;
Fig. 4 is the utility model stem structure schematic diagram.
Wherein:100- ball valves;20- valve bodies;21- first passages;22- second channels;23- third channels;231- limiting sections;
2311- limiting section inner fovea parts;30- spheroids;The valve seats of 31- first;The preload rings of 32- first;The valve seats of 33- second;34- preloading springs;
The pre-tightening sleeves of 35- first;The fixed covers of 36- first;The fixing screws of 37- first;40- valve rods;402- valve rod dops;4021- valve rod cards
Head protuberance;403- valve rod cards bulb;404- necks;41- seals material set;42- pretensions seal material set;420- mounting blocks;
43- installation lids;45- installs lid screw;46- installs lid pre-tightening sleeve;47- installs box nut;55- handles;56- handle mounts;
57- handles install retainingf key.
Embodiment
Such as Fig. 1, such as Fig. 2, Fig. 3 and Fig. 4, a kind of ball valve 100 includes valve body 20, spheroid 30, valve rod 40, sealing material set 41
With installation lid 43;Valve body 20 is three-port structure, and valve body 20 includes first passage 21, second channel 22;The one end of valve rod 40 is provided with
Neck 404, the other end of valve rod 40 are provided with valve rod card bulb 403, and valve rod card bulb 403 is provided with valve rod card in valve rod 40
First 402;First passage 21 is just corresponding to second channel 22, and first passage 21 penetrates with second channel 22;Valve body 20 also includes the
Triple channel 23, the opening direction of third channel 23 is perpendicular to the insertion direction of first passage 21 and second channel 22, third channel 23
For the installation of valve rod 40, ensure that precise control of the valve rod 40 to spheroid 30 is reliable, limiting section is provided with third channel 23
231, limiting section 231 includes limiting section inner fovea part 2311, and the appearance and size of valve rod dop protuberance 4021 is less than limiting section inner fovea part
2311, ensure valve rod 40 valve rod dop 402 can be by limiting section 231 inside, valve rod dop is passed through into limiting section, then,
Valve rod 40 is rotated along axis, valve rod dop 402 is staggered with limiting section 231, in valve rod dop protuberance 4021 and limiting section
The other positions of recess 2311 are blocked, and prevent valve rod 40 from departing from limiting section 231 along the axis direction of valve rod 40;Worn in valve rod dop
Cross limiting section simultaneously, valve rod card bulb 403 coordinates with the mounting groove on spheroid 30, realizes rotation control of the valve rod 40 to spheroid 30
System;Spheroid 30 penetrates direction along first passage 21 and second channel 22 and offers a through hole, when the through hole and first passage
21 connections, while the through hole connects with second channel 22, medium can flow into from first passage 21, be flowed from second channel 22
Go out;Or medium flows into from second channel 22, flowed out from first passage 21;In third channel 23, valve rod 40 and limiting section 231
The space mounting that one side away from first passage 21 surrounds has sealing material set 41, is additionally provided with installation lid 43 and compresses sealing material
Set 41, for ensureing the sealing of ball valve 100, prevents medium from being overflowed from third channel 23.
Spheroid 40 is arranged between first passage 21 and second channel 22, and the mounting structure of spheroid 40 includes the first valve seat
31st, the second valve seat 33, the first pre-tightening sleeve 35, the first fixed cover 36;The above-mentioned part of mounting structure is placed from first passage 21
Into installation;The first valve seat 31 is first placed into second channel 22 along first passage 21, between the first valve seat 31 and valve body 20
It is provided with the first preload ring 32;Place spheroid 30, ensure the mounting groove of spheroid 30 towards third channel 23, meet by valve rod 40 from
After third channel 23 stretches into, the valve rod dop 402 of valve rod 40 can coordinate with the mounting groove on spheroid 30;It is pre- then to place first
Tight set 35, preloading spring 34 is provided between the first pre-tightening sleeve 35 and the second valve seat 33, for mounting structure pretension, ensures spheroid
30 will not be too tight because of mounting structure, and makes control needs very big torque of the valve rod 40 to spheroid 30;It is also prevented from because installation is tied
Structure is too loose, it is impossible to ensures the annexation between valve rod 40 and spheroid 30;First fixed cover 36 withstands the first pre-tightening sleeve 35, and will
First fixed cover 36 is fixed with the first fixing screws 37 with valve body 20.
The ball valve 100 also includes mounting blocks 420, and mounting blocks 420 weld with valve body 20, and mounting blocks 420, which are used to install, to be covered
43 installation is fixed, and using mounting blocks 420 and the welded structure of valve body 20, advantageously reduces cost;Lid 43 and mounting blocks are installed
420 by installing lid screw 45, the installation installation of box nut 47 is fixed, and is also set up between installation lid screw 45 and installation box nut 47
There is installation lid pre-tightening sleeve 46;Pretension sealing material set 42 is additionally provided between installation lid 43 and sealing material set 41, is advantageous to
The sealing effectiveness of enhancing sealing material set 41.
One end that the valve rod 40 of ball valve 100 is provided with neck 404 is provided with handle fixed mount 56, the handle fixed mount 56
The installation of retainingf key 57 is installed by handle with valve rod 40 to fix, handle fixed mount 56 is set along perpendicular to the direction of the axis of valve rod 40
There is the handle installing hole of insertion, handle 55 passes through the handle installing hole;By pulling handle 55, make axle of the valve rod 40 along valve rod 40
Line rotates, and so as to drive spheroid 30 to rotate, realizes control of the ball valve 100 to flow of media.
Above is preferred embodiment of the present utility model, those of ordinary skill in the art understanding of it is of the present utility model
The non-creativeness deformation or change made after technical scheme, it should fall within the scope of the utility model protection.