CN1069849A

CN1069849A - A kind of clawpiece

Info

Publication number: CN1069849A
Application number: CN 92105627
Authority: CN
Inventors: G·J·哈克
Original assignee: NU PULSE NEW ZEALAND
Current assignee: NU PULSE NEW ZEALAND
Priority date: 1991-05-29
Filing date: 1992-05-29
Publication date: 1993-03-17
Also published as: NZ238321A; AU656584B2; AU1727492A

Abstract

A kind of stop valve comprises that a valve head and is bearing in a stop valve guide channel valve rod, and valve rod can move relative to a small opening, and small opening is opened or closed by valve head.Valve head also has the hermetic unit of a sealed stop valve guide channel, and this part seals between guide channel and valve rod when valve head is closed small opening.

Description

A kind of clawpiece

The present invention relates to a kind of clawpiece.

In our unsettled new zealand patent application 229021, we have described a kind of clawpiece, and the design of this kind clawpiece is used for improving the flow regime of milk.Clawpiece described in Zelanian patent application 229021 comprises a stop valve.

The stop valve of the sort of type described in our new zealand patent application above-mentioned has a common defective, and promptly when valve was in the closed position, this stop valve can produce leakage.This leakage results from the part that valve rod passes the clawpiece housing, and this is because the vacuum downstream of outlet is drawn into the hole that the material of outside outside passes by switch valve rod due to the exit.In dairy factory, this leakage may be also has harmful effect to the stability of vacuum.

The objective of the invention is to solve an above-mentioned difficult problem of mentioning.

Further aim of the present invention and advantage will show from the following process that is described by way of example.

According to clawpiece provided by the present invention, it is by comprising a housing, some housing inlets and a housing outlet and a fluid stop valve that is used to open and close a small opening, this valve has a valve head and valve rod, valve rod is supported on a guide channel slidably, thereby valve head can slide between two positions that described small opening is opened and closed, wherein, at open position, said small opening is opened, in the closed position, said small opening is closed by the first surface of a said valve head and the periphery surface tight engagement of a said small opening; Being characterised in that of this clawpiece, said valve head also have one second sealing surfaces, and this surface engages hermetically with the periphery surface of a said guide channel when said valve head is in the closed position.

Said valve head and valve rod all are axially symmetrical and are fixed together coaxially, and first sealing surfaces of said valve head is made of an axially symmetrical sealing surfaces, and this surface engages hermetically with the said periphery surface of said small opening.

Second sealing surfaces is an axially symmetrical surface.

Above-mentioned stop valve has a supporting member, and near said stem guiding passage, supporting member is supported regularly with respect to guide channel, and said valve rod has a setting element.Such design can make said setting element when said valve head is shown in an open position, with said supporting member engagement, so that make said valve head remain on open position.

Above-mentioned small opening is formed between one first chamber and the outlet, and said first sealing surfaces leans hermetically on the inner surface of said first chamber.

Above-mentioned guide channel is formed on the part of said outlet sidewall, and said second sealing surfaces can prevent that fluid from flowing into the inside of outlet with said guide channel when valve head is in described closed position.

Described valve head is formed by the synthetic material die casting, and said valve rod is by plastics or stainless steel manufacturing.

Described supporting member is made of a core bar, this core bar insert regularly with the slotting tube of a part of global formation of described first chamber in.

Consult accompanying drawing below, only be described to various aspects of the present invention by way of example, in the accompanying drawings:

Fig. 1 and 2 is respectively the profile that is in the clawpiece that has stop valve of enable possition and closed position,

Fig. 3 is the end view that is used for the setting element of clawpiece,

Fig. 3 a is the vertical view of setting element shown in Figure 3,

Fig. 4 is the profile after stop valve of the present invention separates with clawpiece.

With reference to accompanying drawing, by the housing shown in the arrow 1,2 and outlets of some housing inlets 3 constitute according to clawpiece of the present invention.In the process of milking, milk 2 enters clawpiece from entering the mouth, and flows out from exporting 3.

The clawpiece housing has the stop valve that a usefulness arrow 4 indicates.The supporting member that one usefulness arrow 5 indicates is positioned near the outlet 3.

The upper periphery of clawpiece has a flange, and this flange is used for clawpiece is connected (not shown) with a pulsator or collection breast part.

Stop valve 4 is made up of a valve head 7, a valve rod 8 and a valve keeper 9.Stop valve has two operating positions, i.e. enable possition as shown in Figure 1 and closed position as shown in Figure 2.Valve head 7 is formed by a synthetic material (as plastics, nylon or rubber) die casting, and keeper 9 also is with same material die casting.Valve rod 8 is made by plastics or stainless steel.

Valve head 7 has the upper surface portion 10 and first sealing surfaces 11 of arch.The surface 11 is inclined-planes, matches with inclined-plane on it will be placed on the housing.Valve head also comprises a cylindrical portions may, and it is installed on the valve rod 8.The bottom surface 13 of cylindrical portions may has a lip ring 14.

When stop valve 14 was in the closed position, as shown in Figure 2, bottom surface 13 just in time first sealing surfaces 11 engages sealing with the adjacent side face of the inner surface of clawpiece 1 before, was sealed in the import department in the hole 15 on the clawpiece lower wall.Lip ring 14 just began to be compressed just before the sealing between the inner wall surface of first sealing surfaces 11 and clawpiece is worked.

Keeper 9 is tab-like elements, and this element has one and has two standing shape mates 16 that lock muscle 17.Locking muscle 17 is locked in the counterpart of adjacent with it supporting member 5.Supporting member 5 is made of barrel 19, ladder and a V-type element 18 that extends out from the clawpiece housing and the core bar 20 that inserts the barrel 19.

Above-mentioned clawpiece is by the transparent plastic injection mo(u)lding.Hole 15 drilled making after injection moulding of holding valve rod 8.All wall thickness of clawpiece are to be identical substantially.Valve head 7, keeper 9, ladder element 18 and core bar 20 form by softer compressible material die casting.Lip ring 14 can with the valve head monolithic molding, also can be an independent O type O-ring (not shown).

When stop valve 4 is in the closed position, engage sealing surfaces 11 and clawpiece housing 1 corresponding face seal, make the inside of housing isolated with outlet 3, at the same time, surface 13 is sealed on the surface of shell of adjacent bores 15, prevents that exterior materials may be inhaled into by the gap between hole 15 and the core bar 8 in the outlet 3.

Various aspects of the present invention are illustrated by way of example, and still, it is made amendment and replenishes also is feasible, and this does not leave spirit of the present invention or title scope.

Claims

1, a kind of clawpiece, comprise a housing, some inlet and an outlet and fluid stop valves that are used for a small opening of opening and closing of drawing that enter this housing from this housing, this stop valve has a valve head and valve rod, said valve rod is bearing in the stop valve guide channel slidably, thus, said valve head can move between an enable possition and a closed position, wherein, on said enable possition, said small opening is opened, on said closed position, one first sealing surfaces of said small opening by said valve head engages hermetically with a circumferential surface of said small opening and is closed, said clawpiece is characterised in that, said valve head also has one second sealing surfaces, this surface engages with a periphery surface of said guide channel hermetically when the said head that closes during in said closed position.

2, a kind of clawpiece as claimed in claim 1, it is characterized in that, said valve head and valve rod are axisymmetric, and be fixed together coaxially, said first sealing surfaces of said valve head is made of an axial symmetry sealing surfaces, and this surface engages hermetically with the said periphery surface of said small opening.

3, a kind of fluid stop valve as claim 1 or 2 is characterized in that, said second sealing surfaces is made of an axial symmetrical surface.

4, a kind of fluid stop valve as claimed in claim 3, it is characterized in that, one supporting member is arranged near the of the logical device of said guiding and is supported regularly with respect to said guide channel, said valve rod has positioning piece, said keeper can mesh with said supporting member when said valve head is in the enable possition, so that said valve head remains on the position of unlatching.

5, a kind of fluid stop valve as claimed in claim 4 is characterized in that, said small opening is formed between one first chamber and the outlet, and said first sealing surfaces leans hermetically on an inner surface of said first chamber.

6, a kind of fluid stop valve as claimed in claim 5, it is characterized in that, said guide channel is formed on the part of said outlet sidewall, and said second sealing surfaces stops fluid to flow to the inside of being explained from said guide channel when said valve head is in said closed position.

7, a kind of fluid stop valve as claimed in claim 6 is characterized in that, said valve head is formed by the synthetic material die casting, and said valve rod is made by plastics or stainless steel.

8, a kind of fluid stop valve as claimed in claim 7 is characterized in that, said supporting member has a core bar, and this core bar is fixed in a part chimeric and at said first chamber and constitutes in the holistic jack.

9, a kind of fluid stop valve, it is consistent in the description of being carried out with reference to the accompanying drawings therewith substantially.