CN218094202U - Valve sleeve type sealing gasket for blowdown valve - Google Patents

Abstract

The utility model belongs to the sealing equipment field discloses a sealed pad of valve barrel formula blowoff valve, including being annular gasket main part, this gasket main part has coaxial fashioned annular boss, annular boss terminal surface constitutes sealed face, has the seal groove of coaxial setting on it, the width of seal groove is crescent along its degree of depth direction, the seal groove disposes the sealing washer rather than suiting. The structure replacement that mainly utilizes the metal pad body to combine the sealing washer replaces traditional polytetrafluoroethylene gasket, effectively prevents that impurity from invading and influencing the leakproofness to optimize the mounting structure of sealing washer, prevent that the sealing washer placed down from deviating from under the high pressure difference effect, improve sealed reliability greatly, structural design is simple, equitable, effectively reduces because the failure frequency of the gas transmission station valve that impurity leads to, improves sealed validity promptly and prolongs the dimension guarantee period, alleviates dimension guarantee work load etc..

Description

Valve sleeve type sealing gasket for blow-down valve

Technical Field

The utility model belongs to the sealing device field, concretely relates to sealed pad of valve barrel type blowoff valve.

Background

The valve end face of a drain valve of a traditional gas transmission station is mostly sealed by a polytetrafluoroethylene gasket, but the gasket is easy to deform and damage under the condition of large pressure difference. Meanwhile, when impurities exist, the impurities easily invade the sealing surface and are pressed on the sealing surface, so that the valve sealing fails. In addition, impurities in gas field water are retained between the valve sleeve and the valve core, so that the pollution discharge valve is difficult to open and close easily, and the maintenance workload of personnel is increased. Meanwhile, because partial impurities are often deposited inside the ball valve, the internal leakage of different degrees can be generated after the valve operates for a period of time, and the workload of valve maintenance can be increased. Therefore, how to improve the sealing reliability between the valve sleeve and the valve core, prevent sealing failure, reduce the workload of valve maintenance, prolong the maintenance period and the like becomes one of the problems to be solved urgently in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a valve barrel type blowoff valve is sealed fills up to solve present used seal gasket reliability of blowoff valve lower, lead to easy sealed inefficacy or increase dimension guarantor work load scheduling problem.

The technical scheme is as follows:

the utility model provides a sealed pad of valve barrel formula blowoff valve which the key lies in: including being annular gasket main part, this gasket main part has coaxial fashioned cyclic annular boss, cyclic annular boss terminal surface constitutes the sealed face, has the seal groove of coaxial setting on it, the width of seal groove is crescent along its depth direction, the seal groove disposes the sealing washer rather than the adaptation.

Scheme more than adopting, utilize gasket main part and cyclic annular boss structure cooperation can improve the installation stability, on the other hand adopts this kind of seal groove structure can be better prevent that the sealing washer from deviating from and impurity invasion, impurity by crowded edge, difficult easy being blocked is convenient for sweep, directly adopts the polytetrafluoroethylene gasket relatively tradition, and is not fragile, can keep better and lasting sealing performance, is favorable to alleviateing dimension guarantor working strength and prolongs dimension guarantor cycle etc..

Preferably, the method comprises the following steps: the gasket main body is made of aluminum or aluminum alloy materials. By adopting the scheme, the gasket main body can be ensured to have better hardness, and meanwhile, the gasket main body has certain elasticity and is not easy to deform.

Preferably, the method comprises the following steps: the surface of the gasket main body is provided with a ceramic coating. By adopting the scheme, the surface scouring resistance of the composite material can be improved, and the influence of impurities and gas scouring can be further relieved.

Preferably, the method comprises the following steps: the cross section of the sealing groove is in an isosceles trapezoid shape. By adopting the scheme, the processing and the manufacturing are convenient, the radial side extrusion force borne by the sealing ring is basically symmetrical, and the stability of the sealing ring in the sealing groove can be improved.

Preferably, the method comprises the following steps: the anti-disengaging bead that has two at least bilateral symmetry settings in the seal groove, the anti-disengaging bead is located the lateral wall of seal groove, just the tank bottom slope setting of anti-disengaging bead towards the seal groove. By adopting the scheme, the sealing ring can be further prevented from being separated from the sealing groove under the action of high differential pressure, and the sealing effectiveness is ensured.

Preferably, the method comprises the following steps: the section of the anti-falling convex edge is in the shape of a right-angled triangle, the right-angled edge of the anti-falling convex edge is perpendicular to the side wall of the sealing groove, and the inclined edge of the anti-falling convex edge faces the notch of the sealing groove. By adopting the scheme, the sealing ring is convenient to install, and because the bevel edge is arranged at the upper part, better downward stopping force can be provided to prevent the sealing ring from being separated.

Preferably, the method comprises the following steps: the sealing ring is calabash-shaped, and the position that its inside and outside both sides correspond anticreep bead has the constant head tank. Utilize the cooperation of constant head tank and anticreep bead, can further prevent that the sealing washer from deviating from, on the other hand reducible permanent transition extrusion to the anticreep bead leads to its deformation, perhaps sealing washer fatigue damage etc..

Preferably, the method comprises the following steps: the bottom of the sealing ring is provided with an avoiding ring groove. Scheme more than adopting, during the installation sealing washer bottom inwards extrudees in order to pack into the seal groove more easily, and the installation after target in place elasticity resets can increase and deviate from the degree of difficulty, and on the other hand also can prevent that sealing washer and seal groove diapire from forming big plane adhesion, increases the degree of difficulty of taking out of later stage sealing washer.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a sealed pad of valve barrel type blowoff valve utilizes the metal pad body to combine the structure replacement traditional polytetrafluoroethylene gasket of sealing washer, effectively prevents that impurity from invading and influencing the leakproofness to optimize the mounting structure of sealing washer, prevent that the sealing washer of placing down from deviating from under the high pressure difference effect, improve the sealing reliability greatly, improve sealed validity promptly and prolong the dimension guarantee period, alleviate dimension guarantor's work load etc..

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a schematic cross-sectional view of a gasket body;

fig. 4 is a cross-sectional structure diagram of the sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, the valve sleeve type blowoff valve sealing gasket of the present application mainly includes a ring-shaped gasket main body 1, the gasket main body 1 has a ring-shaped boss 2 formed coaxially, as shown in the figure, the ring-shaped boss 2 is an integrally formed structure of the gasket main body 1, and an outer diameter of the ring-shaped boss 2 is smaller than a maximum outer diameter of the gasket main body 1, so that the gasket main body 1 is in a step shape, an end surface of the ring-shaped boss 2 forms a sealing surface 20, a coaxially arranged sealing groove 21 is formed on the ring-shaped boss 2, a width of the sealing groove 21 is gradually increased along a depth direction thereof, and a sealing ring 3 adapted thereto is configured, and at least a part of the sealing ring 3 protrudes to the sealing surface 20.

For making sealed the blowoff valve that more adapts to gas transmission station of filling up in this application, so gasket main part 1 adopts aluminium or aluminum alloy material to make, also can adopt 20 just supports certainly, has better elasticity, non-deformable, and at gasket main part 1 surface simultaneously through anodal coating process plated ceramic membrane to increase the resistant scouring resistance of stand wear and tear on gasket main part 1 surface, and sealing washer 3 adopts resistant calculation material of resistant oil to make.

In order to further increase the anti-separation capability of the sealing ring 3, the cross section of the sealing groove 21 is substantially in an isosceles trapezoid shape, at least two anti-separation ribs 22 are symmetrically arranged in the sealing groove 21, the anti-separation ribs 22 are located on the side wall of the sealing groove 21, and the anti-separation ribs 22 are inclined towards the bottom of the sealing groove 21.

In practical application, the section of the anti-slip protrusion 22 is substantially in the shape of a right triangle or a direct trapezoid, the right-angle side 220 is perpendicular to the sidewall of the sealing groove 21, and the inclined side 221 faces the notch of the sealing groove 21.

Accordingly, the sealing ring 3 in this embodiment is substantially gourd-shaped, i.e. the head end is smaller and the bottom end is larger, and the inner and outer sides of the sealing ring have positioning grooves 30 corresponding to the positions of the anti-falling ribs 22, and the positioning grooves 30 are arc-shaped.

In addition, in this embodiment, in order to facilitate the installation of the sealing ring 3, the bottom of the sealing ring 3 is provided with an integrally formed avoiding ring groove 31, the avoiding ring groove 31 protrudes inward along the thickness direction of the sealing ring 3, and the situation that the inconvenient later replacement is caused by the large plane adhesion formed between the avoiding ring groove 31 and the bottom wall of the sealing groove 21 can be avoided.

Referring to the valve sleeve type blowoff valve sealing gasket shown in fig. 1 to 4, the whole wear resistance can be improved under the action of high pressure difference, the scouring damage of impurity and dirt to the sealing surface is reduced, meanwhile, the sealing ring 3 adopts an embedded structure, the structure is stable and reliable, the sealing ring is not easy to fall off under the scouring of a medium, the effective area of the sealing ring 3 is less in contact with the medium, the dirt can be prevented or reduced from being accumulated on the sealing seat of the valve seat, the structural design is simple and reasonable, and the failure frequency of the gas transmission station valve caused by the impurity is effectively reduced.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims (8)

1. The utility model provides a sealed pad of valve barrel formula blowoff valve which characterized in that: including being annular gasket main part (1), this gasket main part (1) has coaxial molding's cyclic annular boss (2), cyclic annular boss (2) terminal surface constitutes sealed face (20), has seal groove (21) of coaxial setting on it, the width of seal groove (21) increases gradually along its depth direction, seal groove (21) dispose rather than the sealing washer (3) that suits.

2. The valve housing style blowoff valve gasket of claim 1, wherein: the gasket main body (1) is made of aluminum or aluminum alloy materials.

3. The valve sleeve type waste fitting valve sealing gasket as claimed in claim 1 or 2, wherein: the surface of the gasket main body (1) is provided with a ceramic coating.

4. The valve housing waste valve gasket as defined in claim 1, wherein: the cross section of the sealing groove (21) is in an isosceles trapezoid shape.

5. The valve housing waste valve gasket as defined in claim 4, wherein: anti-disengaging bead (22) that have two at least bilateral symmetry and set up in seal groove (21), anti-disengaging bead (22) are located the lateral wall of seal groove (21), just anti-disengaging bead (22) set up towards the tank bottom slope of seal groove (21).

6. The valve housing waste valve gasket as set forth in claim 5, wherein: the section of the anti-falling convex rib (22) is a right-angled triangle, the right-angled edge of the anti-falling convex rib is perpendicular to the side wall of the sealing groove (21), and the hypotenuse of the anti-falling convex rib faces the notch of the sealing groove (21).

7. The valve sleeve type waste fitting valve sealing gasket as claimed in claim 5 or 6, wherein: the sealing ring (3) is in a gourd shape, and positioning grooves (30) are formed in the positions, corresponding to the anti-falling convex ribs (22), of the inner side and the outer side of the sealing ring.

8. The valve housing waste valve gasket as defined in claim 7, wherein: the bottom of the sealing ring (3) is provided with an avoidance ring groove (31).

Images