CN202228699U

CN202228699U - Angle-shaped adjusting valve seat easy-to-dismount structure

Info

Publication number: CN202228699U
Application number: CN2011203520616U
Authority: CN
Inventors: 吴勇
Original assignee: SHANGHAI DATONG AUTO CONTROL EQUIPMENT CO Ltd
Current assignee: SHANGHAI DATONG AUTO CONTROL EQUIPMENT CO Ltd
Priority date: 2011-09-19
Filing date: 2011-09-19
Publication date: 2012-05-23
Anticipated expiration: 2021-09-19

Abstract

The utility model discloses an angle-shaped adjusting valve seat easy-to-dismount structure comprising a valve body and a valve seat. An outlet port is disposed in a bottom of the valve body, and is communicated with a valve chamber of the valve body. The valve seat comprises a valve seat body, a protruding part, and an inner part of the valve seat body. The valve seat outlet port is connected with the inner hole of the valve seat body. An outer wall of the valve seat body is cooperated with an inner wall of the outlet port of the valve chamber. The protruding part of the valve seat is provided with screw holes. In the angle-shaped adjusting valve seat easy-to-dismount structure provided in the utility model, a plurality of screw holes are disposed in the valve seat. Screws can be screwed in the screw holes by the dismounting, and the screws can abut against the valve seat in order to open the same, thereby the valve seat can be dismounted without impact forces, the hard materials sintered on the surface can not be damaged, the valve seat can be repeatedly used or repaired, and related parts of the valve body can not be damaged.

Description

Dihedral control valve stand easy-opening structure

Technical field

The utility model belongs to the industrial process control valve, relates to a kind of dihedral control valve stand easy-opening structure specifically.

Background technique

After striding into the new century, the industry of China gets into structural adjustment period, and the chemical industry energy policy has been done great adjustment, is that main turning to coal is main from oil.First procedure of Coal Chemical Industry is that coal is changed into synthetic gas; The low befouling environment again of the gas producing furnace efficient of former usefulness; Country makes a decision superseded; Adopt advanced in the world coal water slurry gasification furnace apparatus (hereinafter to be referred as gasification oven), gasification oven is listed country " 863 " plan in for this reason, and tackles key problems successfully in 2005.

Get into the water coal slurry (being commonly called as Heisui River) of gasification oven burning, existing very strong chemical corrosivity.After throttling, extremely strong erosion attack property is arranged again, also in the gap of part, form coking, and adhesion is very strong.The main product of domestic control valve was the product of introducing from states such as the U.S. and Britain's moral days after the eighties at that time, was used to control general liquid state or gaseous medium, did not have specific functions such as erosion resistance, anti-clogging, shovel coking, therefore can't use.The gasification oven dedicated regulation valve was domestic gap product at that time, leaned on import entirely, the price sky-high price of saying so, and working life is not long yet.The applicant had developed multiple control valve special afterwards, and one of them is erosion resistance angle valve (regulates the water-coal-slurry flow owing to be used for gasifying furnace device, be commonly called as the Heisui River valve); The erosion resistance angle valve can shovel Jiao etc. automatically because control performance is stable, prevents stuck; Surpassed similar imported product service life; And price has only about 1/3rd of inlet valve, from then on achieves instant fame, and wins extensive reputation in the Coal Chemical Industry industry.Since 2005, in Jiangsu, the gasifying furnace device of the large-scale Coal Chemical Industry project of provinces and regions such as Shandong, Inner Mongol, Shaanxi, Shanxi, Xinjiang, this product extensively adopts.

One of major defect of imported product existence at that time is coking.Frequent stuck valve rod is spent one or two months and is taken apart once, and coking is rooted out in manual work, the special cleaning.When the dismounting valve seat; The method of dismounting was to knock valve seat with copper rod itself and valve body are broken away from the past; Because its trim of dihedral modulating valve of import is exposed in the torrent, the permeability of water coal slurry is very strong again, and long valve seat of time one and valve body will form coking and bond together; Often be time-consuming uncertain can the disassembling of requiring great effort again, dismantle sometimes and improperly also can damage valve seat and valve body.

The model utility content

The technical problem that the utility model will solve provides a kind of valve seat easy-opening structure of dihedral modulating valve, can repeat to be suitable for and to repair, and not damage the region of interest of valve body, to overcome the defective that exists in the existing technology.

The utility model adopts following technological scheme:

A kind of valve seat easy-opening structure of dihedral modulating valve; Comprise valve body and valve seat, said valve body bottom is provided with outlet, and this outlet is connected with the interior valve pocket of valve body; Said valve seat comprises valve seat body, lip portions, reaches the endoporus of valve seat body; Said valve outlet is connected with the endoporus of valve seat body, and valve seat body outer wall cooperates with the inwall of valve pocket in the outlet port, and said valve seat lip portions is established screw.

Preferably, said screw has a plurality of, along the even branch of hoop on the lip portions of valve seat.

Further, the endoporus of said valve seat body comprises taper hole and the post hole that is connected, said taper hole surface overlaying hard alloy layer, and said post hole surface studs with the cemented carbide inserts, and the thickness of said cemented carbide inserts is greater than the thickness of hard alloy layer.

Further, the outer wall of said valve seat body comprises continuous conical surface and cylndrical surface, and said cylndrical surface cooperates with the inwall of valve pocket in the outlet port.

Further, also be provided with Sealing between said valve body bottom and the valve seat lip portions.

The valve seat easy-opening structure of the dihedral modulating valve that the utility model relates to is processed several screws on valve seat; When needing dismounting, screw is screwed into, utilizes the strength of screw to back down valve seat; Do not having to pull down valve seat under the situation of impact force; The hard material of its surperficial sintering can be not impaired, and is reusable or repair, and do not damage the region of interest of valve body yet.In addition, at the position point of valve seat, it is very short that promptly the outer peripheral surface of valve seat body (outer wall) is gone up the garden cylinder, and one section conical surface is quite grown in design; When dismounting,, just get into the garden conical surface and pull down easily as long as screw backs down the garden shell of column; When assembling, by conical surface guiding, the cylndrical surface cooperates with the valve pocket inwall then earlier.

Description of drawings

Fig. 1 is the structural representation of the dihedral modulating valve in the utility model.

Fig. 2 is the enlarged diagram of A circle among Fig. 1.

The structural representation of valve seat in the dihedral modulating valve that Fig. 3 relates to for the utility model.

Embodiment

Referring to Fig. 1, be the structural representation of the dihedral modulating valve in the utility model.Comprise valve gap 1, valve body 2, be provided with valve pocket 12 in the valve body 2, valve pocket 12 is divided into uuper valve chamber 121 and lower valve chamber 122; Being provided with intermediate interlayer 13 in the valve body 2, is uuper valve chamber 121 on the said intermediate interlayer 13, is lower valve chamber 122 under the intermediate interlayer 13; Guide pin bushing 3 is set on the intermediate interlayer 13; Penetrate mangetic core assembly 4 in the said guide pin bushing 3, this mangetic core assembly 4 guide pin bushing 3 relatively moves up and down, and said upper and lower valve pocket 121,122 is communicated with through the several through holes on the intermediate interlayer 13 14.The inlet/outlet center line of valve body 2 for vertically to.Being Pneumatic piston actuator above, is dihedral valve body 2 below, and the centre is the support that connects the two.Said valve body 2 bottoms are provided with outlet 15; This outlet 15 is connected with valve body 2 interior valve pockets 12 (being lower valve chamber 122); Said valve seat 5 comprises valve seat body 51, lip portions 52, reaches the endoporus 53 of valve seat body 51; Said valve outlet 15 is connected with the endoporus 53 of valve seat body 51, and valve seat body 51 outer walls cooperate with the inwall of valve pocket 12 at outlet 15 places.Said valve seat lip portions 52 is also established screw 11.When dismounting, be screwed into screw, do not having to remove valve seat 5 under the condition of impact force.Preferably, said screw 11 has 4, along the even branch of hoop on the lip portions 52 of valve seat 5.Between said valve body bottom and valve seat lip portions 52, also be provided with Sealing, Sealing can be a valve body pad 10, after bolt 8, nut 9 are screwed into, can pad be compressed.

Referring to Fig. 2, Fig. 3; The endoporus 53 of said valve seat body 51 comprises the taper hole 531 and post hole 532 that is connected; Said taper hole 531 surface overlaying hard alloy layer a, 532 surfaces, said post hole stud with cemented carbide inserts b, and the thickness of said cemented carbide inserts b is greater than the thickness of hard alloy layer a.Hard alloy layer a can resist the erosion of medium.The high speed erosion in cemented carbide inserts b opposing Heisui River, it is also replaceable to damage the back.

The outer wall of said valve seat body 51 comprises continuous conical surface 512 and cylndrical surface 511, and said cylndrical surface 511 cooperates with the inwall of valve pocket 12 at outlet 15 places.Be that valve seat 5 has tapering with valve body 2 joint partial-lengths, do not have the location of impact when being used to assemble.Valve seat 5 times connects honeycomb duct 6 (endoporus 53 of valve seat body 51 is communicated with the endoporus of honeycomb duct 6), and honeycomb duct 6 is with tubaeform adapter 7 outward, and this adapter 7 is connected with valve body 2.

Guide pin bushing 3 is pressed into the intermediate interlayer 13 of valve body 2, embeds valve body pad 10 in the valve bodies 2, pack valve seat 5 (relying on outer wall cylndrical surface 511 self-alignments of valve seat body 51) in the valve body 2 into again, use screw-driving.Successively honeycomb duct 6 and pad are packed into and take in 7, and with bolt 8 and nut 9 itself and valve body 2 are fixed, this step is the assembling of valve block lower half.

Pack into successively more above mangetic core assembly 4, valve gap 1, use nut screwing clamping then.In the stuffing hole of valve gap 1, embed lower liner and several fillers, pack into to press and fill out lid, the filler double-screw bolt of screwing on again compresses filler with nut, and this step is the assembling of valve block upper half.

When erosion resistance dihedral modulating valve needed repairing, the method for former valve seat 5 dismountings was to knock valve seat 5 surfaces (referring to Fig. 2, i.e. the surface of hard alloy layer a) through copper rod, and valve seat 5 is taken apart in valve body 2.Because the permeability of medium is very strong again; Long valve seat 5 of time one will form coking with valve body 2 and bond together; Knocking valve seat 5 the hard alloy layer a on this part is come off repeatedly, and the cemented carbide inserts b that endoporus 53 is bumped into is damaged, damages valve body 2 sometimes.

Comprehensive above situation has been added 4 screws that run through 11 on the lip portions 52 of valve seat 5, when need dismounting valve seat 5, as long as screw is screwed in 4 screws 11.Rely on the reaction force of screw head and valve body 2 plane roof pressures, valve seat 5 is outwards released fast like a cork.Can not damage the cemented carbide inserts b and the hard alloy layer a surface of valve seat 5 like this.4 screws 11 can be used as handle hole when mounted again.

When valve seat 5 damage the back cemented carbide again built-up welding get on, middle tesserae is replaceable, makes obtain prolonging and repeated use the working life of valve seat 5.

Claims

1. dihedral control valve stand easy-opening structure; Comprise valve body (2) and valve seat (5); Said valve body (2) bottom is provided with outlet (15); This outlet (15) is connected with the interior valve pocket (12) of valve body (2), and said valve seat (5) comprises valve seat body (51), lip portions (52), reaches the endoporus (53) of valve seat body (51), and said valve outlet (15) is connected with the endoporus (53) of valve seat body (51); The outer wall of valve seat body (51) cooperates with the inwall that valve pocket (12) is located in outlet (15), and it is characterized in that: said valve seat lip portions (52) is established screw (11).

2. dihedral control valve stand easy-opening structure according to claim 1 is characterized in that: said screw (11) has a plurality of, along the even branch of hoop on the lip portions (52) of valve seat (5).

3. dihedral control valve stand easy-opening structure according to claim 1; It is characterized in that: the endoporus (53) of said valve seat body (51) comprises taper hole (531) and post hole (532) that are connected; Said taper hole (531) surface overlaying hard alloy layer (a); Surface, said post hole (532) studs with cemented carbide inserts (b), and the thickness of said cemented carbide inserts (b) is greater than the thickness of hard alloy layer (a).

4. dihedral control valve stand easy-opening structure according to claim 1; It is characterized in that: the outer wall of said valve seat body (51) comprises continuous conical surface (512) and cylndrical surface (511), and said cylndrical surface (511) cooperate with the inwall that valve pocket (12) is located in outlet (15).

5. dihedral control valve stand easy-opening structure according to claim 1 is characterized in that: also be provided with Sealing between said valve body (2) bottom and the valve seat lip portions (52).