CN102777611A

CN102777611A - Valve upper structure

Info

Publication number: CN102777611A
Application number: CN2012102184335A
Authority: CN
Inventors: L·兰格
Original assignee: Fluehs Drehtechnik GmbH
Current assignee: Fluehs Drehtechnik GmbH
Priority date: 2011-05-09
Filing date: 2012-05-09
Publication date: 2012-11-14
Also published as: TW201245600A; TWI575175B; DE202011100447U1

Abstract

The invention refers to a valve upper structure, comprising a head part, a mandrel penetrating the head and a valve body controlled by the mandrel and used for contacting with a shell, wherein one side of the valve body deviating from the mandrel is provided with a sealing device which is provided with a valve plunger provided with a sealing member. The sealing member is composed of a sealing pad ring (4) which is prepared by plastics.

Description

The valve superstructure

Technical field

The present invention relates to a kind of valve superstructure (Ventiloberteil) of the preamble according to claim 1, it has head, run through this head in the centre axle and the valve body that is used to contact housing valve seat that can handle through axle.

Background technique

This valve superstructure is known by GB2137736A.The valve superstructure is used for control media and discharges from setting part (Armatur).For this reason, the valve superstructure is screwed in the housing that sets part by its head; On its axle, be fixed with rotatory handling or handle.For control flow rate, be provided with valve plunger, this valve plunger can move in head inside through axle point-blank.For with respect to valve base sealing; Valve plunger is carrying packing ring, and this packing ring is fixed on the valve plunger through the mushroom head of nut or moulding, and is provided with porose; This hole can be implemented in the back and wash away (Hintersp ü len) packing ring, presses against packing ring and the seal ring that surrounds it on the valve seat thus.Here, seal ring is processed by rubber owing to special elastic characteristic.

The shortcoming of aforementioned known valve superstructure is, the manufacturing of packing ring and install very loaded down with trivial details.In addition, employed seal ring more and more can't satisfy the durability and the sealing requirements of increasingly stringent.

Summary of the invention

The present invention will provide auxiliary at this.The objective of the invention is to, propose the valve superstructure of aforementioned type, its manufacturing obtains simplifying, and its seal arrangement also can satisfy the durability and the sealing requirements of increasingly stringent.According to the present invention, this purpose is achieved through the characteristic of the characteristic of claim 1.

Propose a kind of valve superstructure through the present invention, its manufacturing obtains simplifying, and its seal arrangement can satisfy the durability and the sealing requirements of increasingly stringent.The seal washer that use is made of plastics can be realized firm layout, and realizes the plane sealing effect.Make us unexpectedly finding at this, set the various design of the valve seat of part housing to difference, utilize this plastic washer can realize enough sealing effects.

According to design of the present invention, seal washer is provided with the microstructure of reticulate pattern formula at least in its side that deviates from valve plunger.Improve surperficial elasticity thus, and then improved sealing effect.

According to another design of the present invention, seal washer is provided with a kind of macrostructure in the side that it deviates from valve plunger at least, and this macrostructure has a kind of rib formula style.Form another flexible layer thus, and then further improved sealing effect.At this, this rib formula style advantageously is made up of the rib of the preferred ring of annular.Be configured with rib formula style in the both sides of seal washer, can realize bigger prestressing force thus, and then cause higher sealing effect.

According to another design of the present invention, at least one surface of contact of seal washer, the surface of contact that promptly contacts with the valve seat that sets part extension section (Armaturenweite) is convex or bulbous configuration.Can realize a kind of prestressing force thus, utilize this prestressing force to improve sealing effect.Two surface of contact of preferred seal washer are convex configuration, have further strengthened this effect thus.

According to improvement of the present invention, seal washer is processed by polytetrafluoroethylene (PTFE).This material is good at its high durability and durability.

Particularly preferably, seal washer is processed by the polyethylene (PE-UHMW) of super high molecular weight.Made us unexpectedly finding, be suitable for making the seal washer that is used for the valve superstructure especially by the known this material of conveyor belt technical field.The seal washer of being processed by PE-UHMW has good sealing characteristics under the smaller situation of impacting force.

According to design of the present invention, valve plunger is provided with the groove of arranging with one heart with the axle axis that is used to hold seal washer.Realize fixing seal packing ring well thus.Simplified the installation of seal washer in addition.

According to improvement of the present invention, on the axle axis, form pin in the side towards groove of valve plunger, this pin is configured to carry fixed element, and fixed element is used for fixing seal washer.Fixing through to seal washer avoided seal washer movable relatively in groove inside, further reduced wearing and tearing thus.

According to design of the present invention, pin is provided with screw thread at least partly, is used to admit the body of screw or nut body.Realize installing easily the body of screw or nut body thus as fixed element.

According to another design of the present invention, pin is provided with outside thread, and acorn nut is screwed on this outside thread, and seal washer is clamped.Realize making that through acorn nut pin thoroughly seals with respect to the medium that streams.

According to improvement of the present invention, the valve superstructure is applied in and sets in the part housing, and this valve superstructure is setting aspect the part housing through structure, makes the outer diameter of valve plunger be substantially equal to set the inner diameter of the connecting thread of part housing.Realize the high-stability of valve plunger thus.

Description of drawings

Other improvement of the present invention and design provide in the dependent claims of remainder.One embodiment of the present of invention have been shown in the accompanying drawing, have detailed in the face of it down.

Fig. 1 partly shows the valve superstructure with fragmentary axial cross-section;

Fig. 2 shows the valve superstructure of Fig. 1, and it has the seal washer at two surface of contact convex-shaped ground structures; With

Fig. 3 shows the valve superstructure of Fig. 1, and it has the macrostructure of rib shape ground structure on two surface of contact.

Embodiment

The valve superstructure that is selected as embodiment has head 1, and this head is run through in the centre by axle 2, and axle is radially passed in this head.Can handle valve body 3 through axle 2, this valve body contacts with the valve seat 61 of housing 6.Valve body 3 has the valve plunger 33 of cylindricality basically; This valve plunger is carrying seal washer 4; Seal washer by groove 34 around edge 35 surround, this groove is holding seal washer 4, wherein seal washer 4 and groove 34 around edge 35 contact with the valve seat 61 of housing 6.

Head 1 is made up of the hollow body of symmetry, and two end faces of this hollow body open wide.Head has telescopic parts 11 in its side towards housing 6.Form the backstop 12 that is used to contact valve body 3 at these parts 11 interior peripheries.Head 1 has connecting thread 13 in its end arranged outside towards housing 6.Can be screwed into head 1 in the housing 6 that sets part by connecting thread 13.

After being screwed into, screwing of head 1 with a tight waist 14 places on the housing 6 that sets part.Screw with a tight waist 14 and have the circular groove 15 that is used to hold O shape circle 71 in its side towards connecting thread 13.Realize being screwed into by outer polygonal 16 and set in the part, this outer polygonal is arranged on and screws a side that deviates from connecting thread 13 of with a tight waist 14.These parts of head 1 can be in the outside-as shown-being provided with additional screw thread 17, this screw thread is used for admittance-unshowned-sleeve.Screw with a tight waist 14 with the height of screw thread 17, the telescopic parts 11 of head 1 hexagonal part 18 in the inboard is provided with.

Axle 2 is essentially solid design.It deviates from a side four corner fittings 21 outside the outside is designed to of head 1 at it, and is provided with the blind hole 22 that has internal thread in the inboard, is used for fixing-unshowned-rotatory handling.Next, in the arranged outside of axle 2 cylindroid 23 is arranged, axle 2 is radially passed in head 1 with this cylindroid.On cylindroid 23, offer the circular groove 24 that is used to hold O shape circle 72.O shape circle 72 makes axle 2 with respect to head 1 sealing.Between cylindroid 23 and outer four corner fittings 21, be provided with perforation 25, the axle fixed block 73 of locking piston ring form flexibly is inserted in this perforation.Axle fixed block 73 is inserted in the head 1 with preventing axle 2 overshoot degree.

Axle 2 can be rotated in head 1.Axle 2 has outside thread 26 at itself and outer four corner fittings, 21 relative sides.Above outside thread 26, form and screw with a tight waist 27.

Valve body 3 has the parts 31 of hollow pillar, and these parts are connected with valve plunger 33 through the bench 32 of cylindricality.In valve plunger 33, offer the groove 34 that is used to hold seal washer 4 with one heart with the spin axis of axle 2.Groove 34 outwards by around edge 35 limit.Groove 34 is inwardly limited by pin 36, and this pin is taking shape on the valve plunger 33 on the spin axis of axle 2, and above groove 34, is provided with outside thread 37.End that deviates from valve plunger 33 at the parts 31 of hollow pillar forms outer-hexagonal spare 38.Outer-hexagonal spare 38 is used to prevent that valve body 3 is in head 1 inner rotation.The parts 31 of hollow pillar are provided with internal thread 39 in inside.

Seal washer 4 is processed by PE-UHMW in this embodiment, and is circular structure.At this, the outer diameter of seal washer 4 be substantially equal to groove 34 around the inner diameter at edge 35.The surface of contact of seal washer is provided with- microstructure of unshowned-reticulate pattern shape.Offer porose 41 in the centre of packing ring 4.Here, the selected diameter in hole 41 is slightly larger than the outer diameter of the pin 36 of the valve plunger 33 that is carrying packing ring 4 in the zone of groove 34.Seal washer 4 is fixed on the inside of groove 34 through acorn nut 5, and this acorn nut is screwed onto on the outside thread 37 of pin 36.

In the embodiment according to Fig. 2, the surface of contact 42 of seal washer 4 is convex or bulbous configuration.If seal washer presses against on the valve seat 61 that sets part housing

6; Then the sealing packing ring will be pressed on the bottom of groove 34, realizes prestressing thus.Between seal washer 4 and valve seat 61, produce same effect.

In the embodiment according to Fig. 3, seal washer 4 has the rib 43 of two annular configuration of arranging with one heart on its surface of contact.These ribs 43 have the elasticity bigger than seal washer 4 based on its size design, realize higher seal action thus.At this, press against the bottom of groove 34 or press against 61 last times of valve seat at seal washer 4, formed a kind of pre-pressing force that promotes sealing effect.

Valve body 3 is encased in the head 1, makes the outer-hexagonal spare 38 of valve body 3 abut on the interior hexagonal part 18 of head 1, remains on valve body 3 in the head 1 to rotation inhibiting thus.The outside thread 26 of axle 2 is screwed on the internal thread 39 of valve body 3, and wherein, axle 2 axially is fixed on head 1 inside through axle fixed block 73.The rotation of axle 2 thereby cause that valve body 3 moves axially in head 1 inside.This restriction that moves axially the backstop 12 that receives head 1 of valve body 3.Below internal thread 39, in the parts 31 of hollow pillar, be provided with grease case 311.This grease case 311 is used to guarantee the threaded joint (Gewindelauf) between the outside thread 26 of the internal thread 39 of the parts of hollow pillar and axle 2.

Under the installment state of valve superstructure, at the opposite end position of valve body 3, the seal washer 4 that is arranged on the valve plunger 33 abuts on the valve seat 61 of housing 6.At this, the very narrow in this embodiment moulding of valve seat 61 is entail dangers to seal action not because seal washer made of plastic 4 is arranged.Use rubber ring or rubber washer in the prior art, show, the valve seat of this design serious problem occurs owing to its shape stability is little, in contrast, current, if be arranged on seal washer 4-in the groove 34 somewhat deformed of distortion-is only arranged; Guaranteed the plane sealing of valve seat 61 in addition.Here, sealing effect is significantly improved through the convex configuration of set rib structure and/or surface of contact.

Claims

1. valve superstructure; Axle that have head, runs through this head in the centre and the valve body that is used to contact the housing valve seat that can handle through axle, wherein the side that deviates from axle at valve body is provided with seal arrangement, and the sealing device has valve plunger; Valve plunger is provided with Sealing; It is characterized in that Sealing is made up of seal washer (4), the sealing packing ring is made of plastics.

2. valve superstructure as claimed in claim 1 is characterized in that, seal washer (4) is provided with the microstructure of reticulate pattern formula at least in its side that deviates from valve plunger (31).

3. according to claim 1 or claim 2 valve superstructure is characterized in that seal washer (4) is provided with a kind of macrostructure in the side that it deviates from valve plunger at least, and this macrostructure has a kind of rib formula style.

4. valve superstructure as claimed in claim 3 is characterized in that, this rib formula style is made up of the rib of annular.

5. like each described valve superstructure in the aforementioned claim, it is characterized in that preferred two surface of contact of at least one surface of contact of seal washer (4) are convex configuration.

6. like each described valve superstructure in the aforementioned claim, it is characterized in that seal washer is processed by polytetrafluoroethylene (PTFE).

7. like each described valve superstructure in the claim 1 to 5, it is characterized in that seal washer is processed by PE-UHMW.

8. like each described valve superstructure in the aforementioned claim, it is characterized in that valve plunger is provided with the groove of arranging with one heart with the axle axis that is used to hold seal washer (34).

9. valve superstructure as claimed in claim 8 is characterized in that, on the axle axis, forms pin (36) in its side towards groove (34), and this pin is configured to carry fixed element, and fixed element is used for fixing seal washer (4).

10. valve superstructure as claimed in claim 9 is characterized in that, pin (36) is provided with screw thread (37) at least partly, is used to admit the body of screw or nut body.

11. valve superstructure as claimed in claim 10 is characterized in that, pin (36) is provided with outside thread (37), on this outside thread, is screwed with acorn nut (5), and acorn nut clamps seal washer (4).

12. one kind sets the part housing, has according to each valve superstructure in the aforementioned claim, it is characterized in that the outer diameter of valve plunger is substantially equal to set the inner diameter of the connecting thread (13) of part housing.