CN2518084Y

CN2518084Y - Rectangular conic sealing type and advanced valve type aperture plate throttling gear

Info

Publication number: CN2518084Y
Application number: CN 02203736
Authority: CN
Inventors: 沈复中
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-29
Filing date: 2002-01-29
Publication date: 2002-10-23
Anticipated expiration: 2012-01-29

Abstract

The utility model relates to a moment awl seal type high level valve type orifice plate throttling device. The connection and the disconnection of the working cavity and the replacement cavity adopt a moment awl component to realize sealing, and the seal of the replacement window is changed into an external bracing clamp from an external pressure clamp; the utility model has the advantages that the structure is simple, the operation is simple and convenient, the seal is reliable, and the volume of the throttling device is decreased, as well as the weight is reduced.

Description

Rectangular conic sealing type advanced valve type throttle orifice plate apparatus

Technical field

The utility model relates to a kind of measurement mechanism of pipeline fluid flow, particularly relates to a kind of rectangular conic sealing type advanced valve type throttle orifice plate apparatus.

Background technology

In the prior art, the advanced valve type throttle orifice plate apparatus adopts standard orifice plate as measuring sensor, owing to can realize the replacing orifice plate that continues to flow, expand measurement range and be used as rock gas, the gauging instrument of pipeline flows such as sewage, but the restriction device of this form, in the seal isolation process in realizing orifice plate lifting and working chamber and replacing chamber, utilize three handles to finish, structure is numerous and jumbled, complicated operation, Chinese patent " monolever advanced valve type throttle orifice plate apparatus " (patent No. 97229922.4) has overcome the numerous and jumbled defective of the above-mentioned how lever operated structure that causes, but the turnover panel structure that isolating seal adopts in its lifting, easily block and be difficult to and put in place, cause sealing unreliable, measure out of true, in addition, orifice plate is changed window and is adopted circular window, area is big, and space and compressive strength in order to guarantee orifice plate, then must increase the height and the width of corresponding accessory, make the throttling device volume, weight strengthens, and simultaneously, the pore plate by sealing part is located at orifice plate assembly upper end, when lifting, be vulnerable to shear action, thereby increase Mo damage.

Summary of the invention

The purpose of this utility model is the defective that overcomes above-mentioned prior art, provides a kind of sealing reliable, and simple in structure, volume is little, lightweight rectangular conic sealing type advanced valve type throttle orifice plate apparatus.

The technical solution of the utility model is:

A kind of rectangular conic sealing type advanced valve type throttle orifice plate apparatus, comprise upper valve body and the following valve body that is attached thereto by web member, have the replacing window on the described upper valve body, be provided with lifting gear in it, lifting gear links to each other with the handwheel that is located at the upper valve body outside, orifice plate is located in the working chamber of valve body, described orifice plate is fixed on the upstream orifice board component, downstream aperture board component and upstream orifice board component symmetry are located in the valve body working chamber, the side of itself and orifice plate all has groove, O-ring seal is located in the groove, last square awl envelope links to each other by guide ring with following square awl envelope, described guide ring is located at the upstream orifice board component, the periphery of downstream aperture board component, the last cone match of taper hole on the big conical surface of last square awl envelope and the web member, and be connected with lifting gear.

Described replacing window is a rectangle opening, and its port is provided with preceding envelope, and in the groove of envelope, pressing plate was fixed on the upper valve body by screw rod before pressing plate was socketed in.

Advantage of the present utility model is: 1) the utility model working chamber and the break-make of changing the chamber, take square awl assembly, it utilizes lifting gear to realize the lifting of upper and lower square awl envelope, when the following conical surface of square awl envelope contacts with the following conical surface of web member instantly, realization is every envelope, the sealing of this device is reliable, and can make the volume of restriction device reduce weight saving; 2) what overhanging structure of square awl assembly makes orifice plate assembly upstream and downstream end face stretch to extending out when arriving the working position, compresses sealing with sealing gasket, inwardly shrink during lifting, thereby the rectangular window by guide ring is convenient, succinct, compact; 3) O-ring seal is located at the side of orifice plate assembly, has reduced the influence of shearing force when promoting, and reduces wearing and tearing; 4) window that will change window has circular port to change rectangular opening into, can dwindle bore size, simplifies hermetically-sealed construction, thereby reduces the volume and the weight of restriction device; 5) cross section of changing window is made as the square taper, and be provided with matching before envelope and pressure plate structure, the seal form at this place is clamped by external pressure become the outer clamping of drawing, and the interior pressure of fluid makes sealing more reliable during work.

Description of drawings

Fig. 1 is the structural representation of the utility model rectangular conic sealing type advanced valve type throttle orifice plate apparatus;

Fig. 2 is an A-A diagrammatic cross-section among Fig. 1;

Fig. 3 is a B-B diagrammatic cross-section among Fig. 1.

Embodiment

As shown in Figure 1, the utility model rectangular conic sealing type advanced valve type throttle orifice plate apparatus comprises upper valve body 2 and following valve body 1, upper valve body 2 is by web member 6 and following 1 airtight connection of valve body, have conical surface hole on the web member 6, be provided with orifice plate 9 in the valve body working chamber, orifice plate 9 is fixed on the upstream orifice board component 5, downstream aperture board component 17 is located in the working chamber with upstream orifice board component 5 symmetries, the side of orifice plate 9 and downstream aperture board component 17 all has groove, be provided with rubber seal 7 in the groove, last square awl envelope 3 and following square awl envelope 4 all are to be formed by connecting by big frustum and little frustum, and connect by guide ring 8, described guide ring 8 is located at upstream orifice board component 5, guide when the periphery of downstream aperture board component 17, this guide ring 8 move radially with following square awl envelope 4 for last square awl envelope 3, and can guarantee the alignment of orifice plate 9 and measuring channel; The little frustum of last square awl envelope 3 and following square awl envelope 4 is located between orifice plate assembly 5 and the orifice plate assembly 17, the big frustum of last square awl envelope 3 is located in the taper hole of web member 6, its conical surface contacts with the last cone match of web member 6, last square awl envelope 3 links to each other with lifting gear 10 by coupling shaft 16, lifting gear 10 is located in the replacing chamber of upper valve body 2, handwheel 11 is located at the outside of upper valve body 2, and is connected with lifting gear 10, has on the upper valve body 2 to change window 12;

Fig. 2, Fig. 3 are for changing the structural representation of window 12, and the cross section at its window place is the square taper, and preceding envelope 13 cooperates contact with it, and pressing plate 14 is socketed in the groove of preceding envelope 13, and are connected on the upper valve body 2 by screw rod 15.

Position shown in Figure 1 is the synoptic diagram of lifting gear when moving assembly is dropped to minimum point, this moment, upstream orifice board component 5, orifice plate 9, downstream aperture board component 17 were coaxial with measuring channel, last square awl envelope 1 is compressed in pipe axis with following square awl envelope 7, force

orifice plate assembly

5,17 to distinguish left, expand to the right, cause O-ring seal 7 pressurizeds in the both ends of the surface groove to compress, thus sealing; When changing orifice plate, rotate handwheel 11, drive lifting gear 10 and rise, thus drive go up square awl envelope 3, guide ring 8, orifice plate 9, upstream orifice board component 5, downstream aperture board component 17 and down square awl envelope 4 rise, when the conical surface of square awl envelope 17 big frustums contacts with the following conical surface seal of web member 6 instantly, isolated the pressure channel between the replacing chamber in working chamber and the upper valve body 2, at this moment, the screw rod 15 on the replacing window 12 of can outwarding winding is extracted pressing plate 14 out, envelope 13 before taking out, thus orifice plate 9 changed.

Claims

1. rectangular conic sealing type advanced valve type throttle orifice plate apparatus, comprise upper valve body (2) and the following valve body (1) that is attached thereto by web member (6), have on the described upper valve body (2) and change window (12), be provided with lifting gear (10) in it, lifting gear (10) handwheel (11) outside with being located at upper valve body (2) links to each other, orifice plate (9) is located in the working chamber of valve body, it is characterized in that: described orifice plate (9) is fixed on the upstream orifice board component (5), downstream aperture board component (17) is located in the valve body working chamber with upstream orifice board component (5) symmetry, the side of itself and orifice plate (9) all has groove, O-ring seal (7) is located in the groove, last square awl envelope (3) links to each other by guide ring (8) with following square awl envelope (4), described guide ring (8) is located at upstream orifice board component (5), the periphery of downstream aperture board component (17), the big conical surface of last square awl envelope (3) and web member (6) are gone up the last cone match of taper hole, and are connected with lifting gear (10).

2. by the described rectangular conic sealing type advanced valve type of claim 1 throttle orifice plate apparatus, it is characterized in that: described replacing window (12) is a rectangle opening, its port is provided with preceding envelope (13), pressing plate (14) is socketed in the groove of preceding envelope (13), and pressing plate (14) is fixed on the upper valve body (2) by screw rod (15).