CN2589767Y

CN2589767Y - Screw bolt pushing type parallel sealing angle valve

Info

Publication number: CN2589767Y
Application number: CN 02222153
Authority: CN
Inventors: 洪恩
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-08
Filing date: 2002-04-08
Publication date: 2003-12-03
Anticipated expiration: 2012-04-08

Abstract

The utility model relates to a parallel sealing angle valve. A sealing surface is manufactured at a liquid-gas passage inlet in a valve body, and the parallel sealing angle valve uses liquid-gas pressure force and auxiliary spring force to seal. Trapezoid screw rods are assembled to propel a valve rod to do reciprocating rectilinear motion, which completes to adjust flow quantity and open and close the flow quantity. When a valve is opened, a cavity formed by a valve rod middle section with a cross-shaped cross section and an inner wall of an overflow hole of the valve body is used as a liquid-gas passage which completes to convey liquid and gas. The utility model has the advantages of reliable seal, low machining accuracy, low sales price because of low cost, long service life, etc. The parallel sealing angle valve can be used as a preferred accessory for high-middle pressure conveyance pipelines of petroleum, natural gas, coal gas, liquid gas and chemical industry raw materials.

Description

Screw bolt pushing type is along the envelope angle valve

The utility model belongs to the control annex in the liquid letter shoot road.

" in the liquid letter shoot road various valves ' along envelope " formula design principle that the utility model adopts the inventor to declare January 8 2002 " (number of patent application: 021132089) design.The valve of existing various control liquid throughput and break-make all is to stem from identical design principle: the outlet port of liquid gas passage makes sealing surface in valve body, adopts the mode of " blocking up " to seal, and this mode can abbreviate " contrary envelope " as.There is following shortcoming in " contrary envelope " formula valve: exist the trend that liquid gas pressure power is washed sealing open in valve body all the time; Require sealing surface to have higher precision and surface roughness; This has just improved the cost of production and the price of valve; During regulation and control liquid throughput, motions such as the mutual rotation between valve sealing face, translation are carried out under big pressure, therefore, self wear and tear and can strengthen, and are easy to generate leakage, thereby influence the life-span of valve.

Shortcoming at " contrary envelope " formula valve, the utility model adopts " along envelope " design principle, promptly the ingress of liquid gas passage makes conical seal (contact) face in valve body, adopt the end to have the valve rod of the male cone (strobilus masculinus) that matches with above-mentioned conical seal (contact) face, from the flowing hole of valve body, pass, utilize the applying of two conical seal (contact) faces that match and the soft seal ring of male cone (strobilus masculinus) stage casing embedding to seal." ten " font section is processed in the stage casing of valve rod, and the cavity of not only separating but also being communicated with that forms between this of valve rod section and valve body flowing hole promptly can be used as the passage of liquid gas behind valve opening.From this typical " along envelope " structure as can be seen, promote valve rod to liquid gas importer to motion, valve rod end male cone (strobilus masculinus) and on soft Sealing and the valve body conical seal (contact) face between produce the gap, valve promptly is unlocked, this moment the liquid throughput be directly proportional with the move distance of valve rod.And during reversing motion, valve rod moves to right under the promotion of liquid gas pressure power and Returnning spring power, and the liquid throughput progressively reduces to be closed until valve.

Below in conjunction with accompanying drawing structure of the present utility model and working principle are described in detail:

Fig. 1 is a structural drawing of the present utility model.

Among the figure, 1-spring pressuring ring, 2-Returnning spring, 3-seal ring, 4-valve body, 5-valve rod, 6-stuffing box packing, 7-stud bolt, 8-nut, 9-packing ring, 10-nut seat, 11-trapezoidal screw, 12-screw, 13-follower.

As can be seen from the figure, in the entrance point of valve body (4), utilize its internal thread to screw in the spring pressuring ring (1) that has big cavity, Returnning spring (2) location is also pushed down gently, the other end in valve body (4) is pushed down one group of filler with follower (13), and valve rod (5) overhanging end is sealed.With two groups of stud bolt assemblies (7,8,9) that nut seat (10) is fixing in addition, the trapezoidal screw that has handle (11) is screwed in from the trapezoidal screw of nut seat (10), when it promotes valve rod (5) when moving to left, valve promptly is unlocked, when it falls back on the home position, valve rod (5) moves to right under liquid gas pressure power and Returnning spring (2) promotion, is closed until valve.Obviously, in the utility model, liquid gas pressure power has become to help the factor of sealing.Therefore, two sealing cone that matches all need not very high machining accuracy and surface roughness, can obtain desirable sealing, and does not prolongedly leak.In addition, the operating device of valve is external, and the motion of its inside is worn and torn, and can not influence the sealing of valve.If use as high pressure or extraordinary industrial chemicals valve, only need material, and other part gets final product with versatile material according to the selected valve body of the physicochemical property of fed sheet of a media (4), valve rod (5), spring pressuring ring (1), Returnning spring (2), seal ring (3) and stuffing box packing (6).

Claims

1, a kind of body cavity become " " shape; valve rod (5), seal ring (3), Returnning spring (2), spring pressuring ring (1) are housed in its left end inlet hole; stuffing box packing (6) is housed in its right-hand member hole; and it is compressed by follower (13) with screw (12); in addition trapezoidal screw (11), nut seat (10) are fixed on the screw bolt pushing type of valve body right-hand member with stud bolt combination (7,8,9) along the envelope angle valve; it is characterized in that: valve body (4) liquid gas entrance point is crossed head piece and is shaped on one section coned face, and its circular cone drift angle is 60 °～120 °.

2, screw bolt pushing type as claimed in claim 1 is along the envelope angle valve, it is characterized in that: the left end of its valve rod (5) is shaped on the outer conical surface that matches with valve body (4) overcurrent aperture coned face, its circular cone drift angle is 60 °～120 °, the conical surface stage casing is shaped on circular groove, embedded soft seal ring, valve rod (5) stage casing, farthest plain line one section of long 10mm again from the cone root to the valve body upright opening, be processed into "+" font section, the flowing hole of "+" font section cylindrical and valve body (4) is loose Spielpassung.

3, screw bolt pushing type as claimed in claim 1 is along the envelope angle valve, it is characterized in that: in its valve body (4) inlet hole, the outer ring is installed for having externally threaded cirque body, inside is cylindrical body, the middle spring pressuring ring (1) that couples together with 3～4 gussets, its right side contacts with Returnning spring (2) left side, and the right side of Returnning spring (2) contacts with the left side of valve rod (5).

4, screw bolt pushing type as claimed in claim 1 is along the envelope angle valve, it is characterized in that: valve body (4) right side is fixing with nut seat (10) with two groups of stud bolts (7,8,9), and trapezoidal screw (11) is connected with the trapezoidal screw of nut seat (10), and its axis and valve rod (5) axis coaxle degree error is not more than 0.5mm.