CN2811694Y

CN2811694Y - Cage type ball-shaped regulating valve

Info

Publication number: CN2811694Y
Application number: CN 200520071498
Authority: CN
Inventors: 孟少新; 陈彦
Original assignee: WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd
Current assignee: WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd
Priority date: 2005-05-11
Filing date: 2005-05-11
Publication date: 2006-08-30
Anticipated expiration: 2015-05-11

Abstract

The utility model relates to a cage type ball-shaped regulating valve, which belongs to the technical field of automatic control. The utility model is mainly uses that a valve rod is connected with a valve core; a valve seat is pressed on a valve body by an orifice sleeve; an upper cover flange connects an upper cover with the valve body by a bolt; a filler pad, fillers, a filler pressing cover and a pressing plate are respectively arranged on a valve rod. The utility model has the advantages of simple structure, and reasonable and compact structure; the volume is small; the weight is light; rated flow capacity (Cv value) is big; the leaking grade and once assembled qualification rate are high; because the connection of the valve seat and the valve body uses the unthreaded connection, the special equipment for assembling the valve seat of a special regulating valve is not needed when the valve seat the replaced at site, and the regulated flow capacity or the regulated regulating characteristic can be easily changed according to the requirements of on-site using conditions to satisfy the requirements of users; meanwhile, because the orifice sleeve is used, the dynamic noise of a regulating valve is effectively reduced and the generating probability of the cavitation damage phenomena and the cavitation phenomena is reduced.

Description

Cage spherical adjustment valve

Technical field

The utility model relates to a kind of cage spherical adjustment valve, specifically is used for the field instrument that flow, pressure, temperature and thing position four big procedure parameters are regulated and controlled of industrial process automation system, belongs to the automatic control technology field.

Background technique

Before the utility model is made, in prior art, being connected mostly to adopt of the valve seat of modulating valve and valve body is threaded, both simple, guarantee the sealing between valve seat and the valve body again easily, but during binding thread, need with special-purpose assembly equipment, otherwise the sealing surface of valve seat is easily destroyed and distortion, cause reducing the degree of regulation of modulating valve, so just limited the modulating valve scope of repair at the scene, in case there are errors in computation or on-the-spot applying working condition has change for modulating valve, must change whole modulating valve or underground pipelines is changed valve seat to factory, waste time and energy; The modulating valve overall weight is heavy, and volume is big; Owing to adopt the integrated type loam cake, influenced the concentricity of spool and loam cake stuffing box on fastening in the bonnet bolt, spool and valve seat gap are wayward, the leakage class that the technology that many employings are ground in the assembly process is come the regulating and controlling valve, the manufacture cost height, it is low once to assemble up-to-standard rate.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple, compact and reasonable for structure; Volume is little, and is in light weight, improved the leakage class of product greatly and once assembled up-to-standard rate, changes the rated flow coefficient of modulating valve and the cage dress spherical adjustment valve of control characteristic at the scene easily.

Main solution of the present utility model is achieved in that

The utility model mainly adopts valve rod 1 to connect with spool 15, and valve seat 14 is pressed on the valve body 16 by orifice sleeve 12, and loam cake flange 7 usefulness bolts connect loam cake 6 with valve body 16, and Packing seat 5, filler 4, Gland 3 are installed in respectively on the valve rod 1 with pressing plate 2.

Compared with the prior art the utility model has the following advantages:

The utility model is simple, compact and reasonable for structure; Volume is little, and is in light weight, and specified negotiability (Cv value) is big, and leakage class and once assemble the up-to-standard rate height changes the rated flow coefficient and the control characteristic of modulating valve at the scene easily; Because being connected of valve seat and valve body adopted nothing to be threaded, directly be fastened on the valve body with orifice sleeve by last bonnet bolt, control valve stand assembling special device that need not be special-purpose when changing valve seat at the scene, be easy to change the negotiability or the control characteristic of adjusting, satisfy user's requirement according to the requirement of on-the-spot applying working condition; Simultaneously,, effectively reduced the kinetic noise of modulating valve, also reduced the probability that cavitation erosion and cavitation phenomenon produce owing to adopted orifice sleeve.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

The utility model mainly is made up of parts such as valve rod 1, pressing plate 2, Gland 3, filler 4, Packing seat 5, loam cake 6, loam cake flange 7, orifice sleeve pad 8, loam cake pad 9, pin 10, lining 11, orifice sleeve 12, valve seat pad 13, valve seat 14, spool 15 and valve bodies 16.Wherein, valve rod 1 is fixed in case spline moving (formation mangetic core assembly) by using pin 10 after the scyewed joint again with spool 15, valve seat 14 is pressed on the valve body 16 by orifice sleeve 12, valve seat pad 13 is installed between valve seat 14 and the valve body 16, in orifice sleeve 12 upper end slot, lay orifice sleeve pad 8, on the loam cake mounting hole end face of valve body 16, put Cover Gasket sheet 9.After mangetic core assembly and loam cake 6 are installed on the valve body 16, loam cake flange 7 utilizes bolt that loam cake 6 is connected (but the bolt on the loam cake flange wouldn't be tightened) with valve body 16, black box is installed again, black box is installed in respectively on the valve rod 1 with pressing plate 2 by Packing seat 5, filler 4, Gland 3, and mounting bush 11 on the valve rod 1.At last, tighten attachment bolt on the loam cake flange 7, and meanwhile note adjusting flexibility and the straight line motion of mangetic core assembly, and guarantee the sealing of loam cake 6 and valve body 16.

The utility model has pneumatic (or electronic) straight journey actuator that accepts 4-20mA (or 0-10mA) standard control signal to drive, driving valve rod and spool makes straight-line displacement and changes captured area between spool and the valve seat, come stably flow, temperature, pressure or the thing position of control media by the adjustment curve on the spool, satisfy on-the-spot requirement.Be mainly used in iron and steel, petrochemical industry in the higher robot control system(RCS) of automaticities such as papermaking, is specially adapted to than small flow, and highi degree of accuracy needs frequent movement, and leakage is had strict demand, the harsh occasion that field working conditions often changes.

Claims

1, a kind of cage spherical adjustment valve, comprise valve seat (14), spool (15), valve body (16), it is characterized in that adopting valve rod (1) to connect with spool (15), valve seat (14) is pressed on the valve body (16) by orifice sleeve (12), loam cake flange (7) connects loam cake (6) with bolt with valve body (14), Packing seat (5), filler (4), Gland (3) are installed in respectively on the valve rod (1) with pressing plate (2).

2, cage spherical adjustment valve according to claim 1 is characterized in that laying orifice sleeve pad (8) in described orifice sleeve (12) upper end slot, puts Cover Gasket sheet (9) on the loam cake mounting hole end face of valve body (16).