CN1166583A

CN1166583A - Valve

Info

Publication number: CN1166583A
Application number: CN 97106815
Authority: CN
Inventors: 郭建国; 杨新民; 管雪元
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-15
Filing date: 1997-01-15
Publication date: 1997-12-03

Abstract

The valve consists of valve body, valve base, valve rod and clack. The valve body has a sealing isolating jacket, and the valve rod and the clack are mounted inside an enclosed casing constituted by the valve body and the jacket. There is one magnet pair for coupling rotation, the outer magnet ougnet outside the enclosed casing is rotated manually or electrically, and the inner magnet inside the enclosed casing is made to rotate and drive clack for open or close. In this way, the fluid medium inside the valve body can not permeate outside the casing and this makes the said valve have no leakage.

Description

Valve

The present invention relates to a kind of valving.

At present, be widely used in petrochemical industry, coal gas, the most usefulness of the valve in fields such as water is dim be as " valve design handbook (Lu Yuanquan chief editor, China Machine Press publishes in December, 1992, the second impression in October nineteen ninety-five) disclosed various valve mechanism form, it comprises valve body, valve gap, valve rod, handle, valve seat, assemblies such as flap, handle is positioned at the top of valve body, one handle is installed in the outside of valve gap, some also is mounted in the outside of valve gap to valve rod near handle one end, valve is can make the Stem Mut rotation of valve rod in valve gap by handle with sleeve, and the rotation of valve rod on Stem Mut realizes the lifting of the relative valve seat of flap, thereby realizes that valve opens or closes.But this valve exists certain shortcoming: because the valve rod elevating movement, make the stuffing box packing of valve rod and valve cover chamber owing to the rotation of valve rod, have certain clearance between stuffing box packing and valve rod and cause; Secondly,, cause certain wearing and tearing owing to rub, make easily to produce seepage between stuffing box packing and the valve rod and make stuffing box packing because valve rod is often opened; At last, since the total axial force of valve rod when closing comprise from the sealing load on the valve seat, act between medium power, valve rod and the stuffing box packing on the flap frictional force stem shaft to component, therefore total axial force of valve rod is very big, will increase the screw thread that is connected between stuffing box packing, valve body and the valve gap or the wearing and tearing of flange and valve seat and flap surface of contact like this, reduce the working life of these sealing part, thereby made valve be very easy to seepage.

The objective of the invention is to overcome the defective of above-mentioned valve and a kind of ne-leakage valve is provided.

For achieving the above object, valve of the present invention comprises valve body, valve rod, and described valve body is in its influent stream road that is interconnected and go out the runner intersection one valve seat is installed; Valve seat when valve closing be installed in valve rod on flap sealing contact, its characteristics are that a spacer device is installed in sealing on valve body, described valve rod is installed among the enclosing housing that is isolated from the outside that is made of jointly valve body and spacer device fully, in the inside and outside magnetic pair that has a pair of mutual magnetic coupling to rotate of spacer device, its China and foreign countries' magnetic pair can make the driver part of its rotation link to each other with one, and a transmitting assemblies that opens or closes that the rotation of interior magnetic pair can be converted to flap is arranged between interior magnetic pair and valve rod and the flap.

Above-mentioned valve is by the mutual magnetic coupling rotation between interior magnetic pair and the outer magnetic pair and the conversion of transmitting assemblies, and drive opening or closing of valve rod and flap, because outer magnetic pair is installed in outside the spacer device, and interior magnetic pair, valve rod and flap are installed in by the spacer device, valve body is formed in the housing of sealing, therefore they are not communicated with outer magnetic pair and valve driving part, the valve rod of valve and flap are when opening or closing, the medium that flows in the valve body just can not ooze out by the spacer device, outside the housing of the sealing that valve body is formed, thereby fundamentally solved the leakage problems of valve.

The present invention is further illustrated below in conjunction with drawings and Examples.

Fig. 1 is a kind of embodiment's of a valve of the present invention erection drawing.

Fig. 2 is the sectional view along A-A shown in Figure 1 place.

Fig. 3 is the another kind of embodiment's of a valve of the present invention structural representation.

As Fig. 1, shown in Figure 2, in a kind of embodiment of valve of the present invention, valve is by valve body 1, valve seat 2, valve rod 3 and flap 5 constitute, described valve body 1 has the influent stream road 11 that is interconnected and goes out runner 12, in the influent stream road 11 of valve body 1 with go out runner 12 intersections one valve seat 2 is installed, described valve rod 3 is installed flap 5 near valve seat 2 one ends, flap 5 contacts with valve seat 2 sealings when valve closing, and a spacer device 8 is installed in sealing on the passage of valve body 1 installation valve rod 3, valve body 1, the spacer device 8 common housings that constitute a sealing, described valve rod 3 is installed within the housing of sealing fully, in spacer device 8 outsides magnetic pair 10 outside is arranged, in spacer device 8 enclosure interior magnetic pair 9 in is installed, interior magnetic secondary 9 forms the magnetic pair that a pair of mutual magnetic coupling is rotated with outer magnetic secondary 10, their commons axis of rotation are the shaft axis of valve rod 3, described outer magnetic pair 9 and one can make the driver part 6 of its rotation link to each other, driver part 6 is a handwheel 6a in the present embodiment, magnetic pair 9 links to each other with valve rod 3 by a transmitting assemblies 7 in described, transmitting assemblies 7 is a Stem Mut 7a in the present embodiment, and it can convert the rotation of interior magnetic pair 9 to the action that opens or closes of the elevating movement of valve rod 3 and flap 4.

In the present embodiment, spacer device 8 comprises that a sealing is installed in the valve gap 4 of valve body 1, and an outer separator 8b is installed in sealing on the valve gap 4, and an inner spacing collar 8a is installed in sealing between interior magnetic secondary 9 and outer magnetic secondary 10 and the handwheel 6a, and inner spacing collar 8a sealing is installed on the outer separator 8b; Block, the openable hole of one usefulness plug 8c, end socket 8d is arranged on the inner spacing collar 8a, its objective is convenience for valve rod 3 dismounting, maintenance; The spacer device 8 that valve gap 4, inner spacing collar 8a, outer separator 8b, plug 8c, end socket 8d constitute is formed the housing of a sealing with valve body 1.Make handwheel 6a and outer magnetic pair 10 keep apart with valve rod 3, flap 5.

For the Stem Mut 7a in the valve is rotated better, steel ball 13 is installed outside Stem Mut 7a.

For valve opening and closing moment is reduced, flap 5 can be designed to the combined type flap, it comprises a main valve clack 5a, its front-end face 5d can contact the common main valve that constitutes valve with valve seat 2 sealings, front-end face 5d center, have out to going out pressure guide hole 5b runner 12, that can be closed by valve rod 3 bottoms, the pilot valve of the bottom formation valve of pressure guide hole 5b and valve rod 3 with respect to valve rod 3 bottoms places; The side of main valve clack 5a housing offers the relief hole 5c that leads to influent stream road 11, have one on the body of rod of valve rod 3 in main valve clack 5a housing and can drive the device that main valve starts after the pilot valve unpacking, this device can be boss (or pin) 3a of a length greater than valve rod 3 diameters.

The structure of another embodiment of the present invention as shown in Figure 3, magnetic secondary 9 and outer magnetic pair 10 commons axis of rotation have an angle in the outside of the shaft axis of valve rod 3 and with the shaft axis of valve rod 3 in described, outer magnetic secondary 10 and interior magnetic pair 9 are kept apart by spacer device 8, outer magnetic pair 10 is driven parts 6 and drives, in the present embodiment, driver part 6 is a roulette wheel 6a ' who is driven by motor (also can use hand), interior magnetic secondary 9 passes through one group of transmitting assemblies 7 and is connected with valve rod 3, and transmitting assemblies 7 can convert rotatablely moving of interior magnetic pair 9 to the rotary lifting movement of valve rod 3 and opening of flap 5, close.Transmitting assemblies 7 comprises worm gear 7a ', the worm screw 7b of a pair of gear pair 7c and pair of meshing, the driving wheel of gear pair 7c has identical running shaft with interior magnetic pair 9, the follower of gear pair 7c has identical running shaft with worm screw 7b, and worm gear 7a ' is fixed together with valve rod 3.

Working principle of the present invention is as follows: driver part 6 can be used artificial (as handwheel 6a) or electronic mode (as roulette wheel 6a ') rotary driving, and then the rotation of the outer magnetic pair 10 of drive, finish the transmission of moment by the outer magnetic secondary 10 and the coupling of secondary 9 magnetic forces of interior magnetic, with the rotation of magnetic pair 9 in driving, by the lifting of driving belt ovable valve stem 3 and the opening or closing of flap 5 of transmitting assemblies 7 (as Stem Mut 7a).When flap 5 is designed to contain under the compound flap form situation of pilot valve, main valve, if when under closing situation fully, opening, the instantaneous generation of the maximum axial force of valve rod 3, owing to start pilot valve earlier, and the inside nominal diameter of pilot valve is less, simultaneously, because relief hole 5c and pressure guide hole 5b connect, reduced the axial force of medium, so running torque is less to valve rod 3; When pilot valve is opened fully, by the drive of boss or pin 3a, thereby start main valve, that is to say, when using compound flap, the keying moment of valve is reduced.

Valve body 1 of the present invention is not limited to the structure shown in the embodiment.Transmitting assemblies 7 also is not limited to two mode of structure described in the embodiment, also can be other gear or the worm and gear kind of drive.Valve of the present invention can be the valve of stop valve, high pressure valve, vacuum valve and other kind.If for gate valve or butterfly valve, what be installed in that the valve rod lower end contacts with valve seat is flashboard or butterfly plate.

Claims

1, a kind of valve, it comprises valve body (1), valve rod (3), described valve body (1) is in influent stream road (11) that it is interconnected and go out runner (12) intersection one valve seat (2) is installed; Valve seat (2) contacts with a flap (5) sealing on the valve rod (3) when valve closing, it is characterized in that: go up sealing at valve body (1) one spacer device (8) is installed, described valve rod (3) is installed in fully by among valve body (1) and the common enclosing housing that is isolated from the outside that constitutes of spacer device (8), in spacer device (8), the magnetic pair that has a pair of mutual magnetic coupling to rotate outward, outer magnetic pair (10) and one wherein can make the driver part (6) of its rotation link to each other, and has one the rotation of interior magnetic pair (9) can be converted to the transmitting assemblies (7) that flap (5) opens or closes action between interior magnetic pair (9) and valve rod (3) and the flap (5).

2, according to the described valve of claim 1, it is characterized in that: the running shaft of magnetic pair (9) and outer magnetic pair (10) is all on the shaft axis of valve rod (3) in described.

3, according to the described valve of claim 1, it is characterized in that: the running shaft of magnetic pair (9) and outer magnetic pair (10) has an angle in the outside of the shaft axis of valve rod (3) and with the shaft axis of valve rod (3) in described.

4, according to claim 1 or 2 described valves, it is characterized in that: the driver part (6) that described and outer magnetic pair (10) links to each other is a handwheel (6a), and outer magnetic pair (10) is fixed on the handwheel (6a).

5, according to claim 1 or 3 described valves, it is characterized in that: the driver part (6) that described and outer magnetic pair (10) links to each other is a manual or electric motor driven roulette wheel of quilt (6a ').

6, according to claim 1 or 2 described valves, it is characterized in that: the transmitting assemblies (7) that is connected between magnetic pair (9) and the valve rod (3) in described is a Stem Mut (7a), interior magnetic pair (9) is fixed on the Stem Mut (7a), Stem Mut (7a) be sleeved on valve rod (3) the screw thread place, can with valve rod (3) coupling rotation.

7, according to the described valve of claim 1, it is characterized in that: described flap (5) comprises that one is sleeved on that valve rod (3) is gone up and can be along the axially movable main valve clack of valve rod (3) (5a), its front-end face (5d) contacts with valve seat (2) sealing when valve closing, the center of front-end face (5d), have out to valve body (1) with respect to valve rod (3) bottom place and to go out runner (12), the pressure guide hole (5b) that can be closed by valve rod (3) bottom, the side of main valve clack (5a) housing offers the relief hole (5c) that leads to valve body (1) influent stream road (11), have one on the body of rod of valve rod (3) in main valve clack (5a) housing and drive the device that main valve clack starts, this device can be boss or the pin (3a) of a length greater than valve rod (3) diameter.