CN2529052Y

CN2529052Y - Throttling element

Info

Publication number: CN2529052Y
Application number: CN 02218383
Authority: CN
Inventors: 王惠雨; 戴朗才; 邵国标; 尹同霞
Original assignee: JIANGSU YUDA POWER STATION AUX
Current assignee: JIANGSU YUDA POWER STATION AUX
Priority date: 2002-01-17
Filing date: 2002-01-17
Publication date: 2003-01-01
Anticipated expiration: 2012-01-17

Abstract

The utility model provides a throttling element, which comprises a throttling plate. The throttling plate is provided with a plurality of combinations of throttling areas. Each throttling area consists of the throttling area I and the throttling area II. An outer flowing groove of the throttling area I is communicated with an outer side of the throttling plate. An inner flowing groove of the throttling area I is communicated with an inner hole of the throttling plate. The inner flowing groove of the throttling area I is communicated with a middle flowing groove. The outer flowing groove of the throttling area II is communicated with the inner flowing groove of the throttling area II. The outer flowing groove and the inner flowing groove of the throttling area II are respectively provided with a throttling hole through from up to bottom. The two throttling plates are overlapped in the same direction, and the throttling area I of one throttling plate is opposite to the throttling area II of another throttling plate. The utility model is suitable for high pressure differential adjusting valve, and can achieve throttling of a plurality of stages and right-angle turning of a plurality of times, greatly reduce the pressure differential born by each stage of the throttling, reduce the flow speed of the medium in a throttling part of the throttling plate and overcome the phenomenon of cavitation generated in the throttling part, and has the advantages of small vibration, low noise, small leakage flow and long service life.

Description

Throttle element

Technical field:

The utility model relates to modulating valve, particularly the throttle element of high-differential-pressure regulating valve.

Background technique:

Existing high-differential-pressure regulating valve generally adopts the mode of multistage throttle, and along the axial arranged some grades of throttling elements of valve, but throttling progression is no more than 4 grades usually, otherwise brings certain difficulty because valve mechanism length is excessive to processing.Because throttling progression is few, the pressure reduction that each grade throttling is born is just big, like this, medium is just high at the flow velocity at the throttling position of throttling element, sometimes up to more than the 100m/s, high like this flow velocity, not only throttling element there is very big souring, even more serious is, in throttling process, medium will change into kinetic energy with a part of potential energy, makes the static pressure at throttling position be lower than saturation pressure, more be lower than the static pressure after the throttling, this just is easy to produce cavitation at the throttling position, and cavitation can not only cause valve judder and huge noise, brings threat to safety in production, cavitation can also generate the surface that high-velocity particles impacts throttling element, causes the throttling element surface metal tired and peel off throttling element is scrapped very soon.

Summary of the invention:

The purpose of this utility model is to provide a kind of can overcome above-mentioned defective, can realize the throttle element of multistage composite assembling.

Solution of the present utility model is: contain the throttling sheet, the throttling sheet is provided with some groups of choke zone, every group of choke zone is made up of choke zone I and choke zone II, choke zone I contains interior chute, middle chute, outer chute, choke zone II contains interior chute, outer chute, the outer chute of choke zone I communicates by the outside of restriction with the throttling sheet, and the interior chute of choke zone I communicates by the endoporus of restriction with the throttling sheet, and interior chute and the middle chute of choke zone I interlink by restriction; The outer chute of choke zone II communicates with the interior chute of choke zone II, is provided with the throttle orifice of up/down perforation in the outer chute of choke zone II and the interior chute of choke zone II, and the throttling sheet is superimposed in the same way in twos, and the choke zone I of this throttling sheet is relative with the choke zone II of those throttling sheets.

The lower surface of throttling sheet is provided with tooth.

Adopt the utility model can realize multistage throttle and right-angle turning repeatedly, the pressure reduction that every grade of throttling is born reduces greatly, and medium is in the flow velocity reduction at the throttling position of throttling sheet, overcome the cavitation phenomenons that the throttling position produces, vibrated for a short time, noise is low, leakage current is few, long service life.

Description of drawings:

Accompanying drawing has provided an embodiment of the present utility model:

Fig. 1 is the utility model embodiment's a structural representation;

Fig. 2 is the utility model embodiment's an A-A sectional view.

Among the figure, 1---restriction; 2---outer chute; 3---restriction; 4---middle chute; 5---restriction; 6---interior chute; 7---outer chute; 8---interior chute; 9---restriction; 10---endoporus; 11---throttle orifice; 12---throttle orifice; 13---tooth; 14---the throttling sheet; 15---the throttling sheet.

Embodiment:

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:

Present embodiment contains 2 throttling sheets 14,15, throttling sheet 14,15 is provided with three groups of choke zone, every group of choke zone is made up of choke zone I and choke zone II, chute 6, middle chute 4 and outer chute 2 in being provided with in the choke zone I, chute 8 and outer chute 7 in being provided with in the choke zone II, the outer chute 2 of choke zone I communicates by the outside of restriction 3 with throttling sheet 14,15, the interior chute 6 of choke zone I communicates by the endoporus 10 of restriction 1 with throttling sheet 14,15, and middle chute 4 and interior chute 6 interlink by restriction 5; The outer chute 7 of choke zone II communicates with the interior chute 8 of choke zone II by restriction 9, be respectively equipped with the throttle orifice 12 of up/down perforation in the outer chute 7 of choke zone II and the interior chute 8 of choke zone II, 11, throttling sheet 14,15 is superimposed in the same way in twos, and the 60 ℃ of angles of staggering, the choke zone I of envoy's flow 14 is relative with the choke zone II of throttling sheet 15, the middle chute 4 of choke zone I on the throttling sheet 14 and outer chute 2 are by throttle orifice 11,12 with throttling sheet 15 on choke zone II on interior chute 8 and outer chute 7 communicate, the middle chute 4 of the choke zone I on the throttling sheet 14 and outer chute 2 pass through throttle orifice 11,12 with throttling sheet 15 on choke zone II on interior chute 8 and outer chute 7 communicate.The lower surface of throttling sheet 14,15 is provided with tooth, is used for the sealing of 14,15 of throttling sheets, because the pressure of crown is big, 4,15 combinations of envoy's flow face are tight, good sealing effect.

Medium enters outer chute 2 in the choke zone I from the restriction 3 on the throttling sheet 14, does in the outer chute 2 of medium in choke zone I to expand for the first time, finishes a step-down, and medium is made right-angle turning 1 time in the chute 2 outside; Medium in the outer chute 2 in the choke zone I through a step-down after, enter the outer chute 7 of choke zone II by throttle orifice 12, do in the outer chute 7 of medium in choke zone II to expand for the second time, finish the secondary step-down, simultaneously, medium is made right-angle turning 2 times; Outer chute 7 medium in the choke zone II through the secondary step-down after, enter the interior chute 8 of choke zone II by restriction 9, do in the interior chute 8 of medium in choke zone II to expand for the third time, finish three step-downs, simultaneously, medium is made right-angle turning 2 times; Interior chute 8 medium in the choke zone II through three step-downs after, enter middle chute 4 in the choke zone I by throttle orifice 11, do the 4th time in the middle chute 4 of medium in choke zone I and expand, finish four step-downs, simultaneously, medium is made right-angle turning 2 times; Middle chute 4 medium in the choke zone I through four step-downs after, enter interior chute 6 in the choke zone I by restriction 5, do the 5th time in the interior chute 6 of medium in choke zone I and expand, finish five step-downs, simultaneously, medium is made right-angle turning 2 times; Medium in the interior chute 6 in the choke zone I enters the endoporus 10 of throttling sheet 14,15 through restriction 1, and simultaneously, medium is made right-angle turning 1 time.Medium will be through five step-downs, just flow out from restriction 1 after turning round for 10 times in whole flow process, reach the pressure that needs.Medium from throttling sheet 15 enter choke zone I working procedure and last with.

The utility model can be according to the design needs, with the some a pair of in twos superimposed installations of throttling sheet, to obtain best using effect.

Claims

1, throttle element, it is characterized in that: contain the throttling sheet, the throttling sheet is provided with some groups of choke zone, every group of choke zone is made up of choke zone I and choke zone II, choke zone I contains interior chute, middle chute, outer chute, and choke zone II contains interior chute, outer chute, and the outer chute of choke zone I communicates by the outside of restriction with the throttling sheet, the interior chute of choke zone I communicates by the endoporus of restriction with the throttling sheet, and interior chute and the middle chute of choke zone I interlink by restriction; The outer chute of choke zone II communicates with the interior chute of choke zone II, is provided with the throttle orifice of up/down perforation in the outer chute of choke zone II and the interior chute of choke zone II, and the throttling sheet is superimposed in the same way in twos, and the choke zone I of this throttling sheet is relative with the choke zone II of those throttling sheets.

2, throttle element according to claim 1 is characterized in that: the lower surface of throttling sheet is provided with tooth.