CN201170077Y

CN201170077Y - Ram block shaft seal components

Info

Publication number: CN201170077Y
Application number: CNU2008200742054U
Authority: CN
Inventors: 唐建华; 祖利民
Original assignee: CANGZHOU DETAIKE DRILLING EQUIPMENT Co Ltd
Current assignee: CANGZHOU DETAIKE DRILLING EQUIPMENT Co Ltd
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2008-12-24
Anticipated expiration: 2018-03-26

Abstract

The utility model discloses a sealing assembly for a flashboard of a blowout preventer, comprising a Y type sealing ring (1), a V-shaped ring (2), and a V-shaped seat ring (3). The V-shaped ring (2) is arranged in front of the V-shaped seat ring (3), and the Y-shaped sealing ring (1) is arranged in front of the V-shaped ring (2). The assembly is characterized in that the bottom of the Y-shaped sealing ring (1) is manufactured to be V-shaped, and the bottom matches the V-shaped ring (2) at the rear side. The rear side of the Y-shaped sealing ring (1) matches the V-shaped seat ring (3). The rear side of the V-shaped seat ring (4) is a plane. The sealing assembly can obtain a good sealing effect at a low pressure or a high pressure, and can prevent the sealing ring from being extruded and damaged at a high-pressure media, thereby improving the service life of the product and the reliability of the operation.

Description

The ram block shaft seal assembly

Affiliated technical field

The utility model belongs to oil drilling facility parts, is meant a kind of oil drilling ram block shaft seal assembly especially.

Background technology

Preventer is the visual plant in the modern oil drilling, and it mainly acts on is the generation that prevents gas blowout accident in drilling process.Ram preventer is a kind of of preventer, and the oil cylinder that it is mainly closed by pressure-bearing shell, side door, flashboard, driving flashboard etc. is formed.The rod-type part that connects flashboard and driven plunger is called flashboard axis, and flashboard one side of flashboard axis is a medium in the well, and opposite side is for driving oil circuit.The ram block sealing is one of most important seal point of preventer, and its reliability has directly influenced the reliability of preventer.More common seal form has two kinds: in groups W circle or v-ring; Single-piece y-shaped ring or combination rectangular loop.Following problem is arranged: during actual the use 1) when the sealing ring that uses in groups, because structural restriction, its pretightning force size can't be adjusted, be difficult to compensation after the wearing and tearing, cause sealing effectiveness undesirable, 2) y-type seal ring low pressure or initial stage sealing effectiveness are better, but it is squeezed into the gap easily and destroys under the high pressure effect.

Summary of the invention

The purpose of the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of improved ram block shaft seal assembly is provided, and it is simple in structure, and is easy for installation, and result of use is good.

For reaching above-mentioned purpose, the utility model is taked following technical scheme: the utility model includes: y-type seal ring, v shaped ring, V-shape base circle, v shaped ring is installed in the front of V-shape base circle, y-shaped ring is installed in the front of v shaped ring, their integral installations is characterized in that in closure gasket groove: V-arrangement has been made in the bottom of y-shaped ring, and is identical with the v shaped ring of back, y-shaped ring back and V-shape base circle coincide, and the back of V-shape base circle is the plane.

The utility model is taked technique scheme, have following beneficial effect: y-type seal ring has the better seal ability, but it is anti-extrudability relatively poor, Y-shaped ring and v shaped ring combination sealing in the utility model, V-arrangement is made in Y shape circle bottom, relative with hardness higher, anti-extrusion performance teflin ring preferably cooperates.V shaped ring can be single, also can a plurality ofly use in groups.When high-pressure medium affacts y-shaped ring, y-shaped ring transfers the pressure to the rear portion v shaped ring, its distortion is opened v shaped ring outward, itself and sealing surfaces are fitted tightly, prevent that the softer y-shaped ring of hardness is squeezed into seal clearance and destroys, v shaped ring also can participate in sealing simultaneously, thereby improves flashboard axis black box sealability under high pressure.Major advantage of the present utility model is: 1) all can obtain good sealing effectiveness under high and low pressure; 2) can prevent that sealing ring from extruding destruction under high-pressure medium, thereby improve the application life of product and the reliability of work.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the utility model structure diagram.

Mark among the figure: 1-Y shape sealing ring, 2-V shape circle, 3-V shape seat ring.

The specific embodiment

By shown in Figure 1, the utility model comprises: y-type seal ring 1, v shaped ring 2, V-shape base circle 3, v shaped ring 2 is installed in the front of V-shape base circle 3, y-shaped ring 1 is installed in the front of v shaped ring 2, their integral installations is characterized in that in closure gasket groove: V-arrangement has been made in the bottom of y-shaped ring 1, and is identical with the v shaped ring 2 of back, y-shaped ring 1 back and V-shape base circle 3 coincide, and the back of V-shape base circle 3 is the plane.

The utility model is installed on the sealing position as black box, and after the installation, the lip limit of y-shaped ring is by precommpression.Press the position among Fig. 1, the pressure medium of sealing is from top, pressure medium makes two lip limits of y-shaped ring fit closely with the sealing position, pressure medium is passed to the v shaped ring and the V-shape base circle of its back by y-shaped ring simultaneously, impel outside its lip limit Zhang Eryu sealing position to fit tightly, prevented that the Y sealing ring is squeezed into seal clearance and destroys.

The utility model y-type seal ring adopts quality of rubber materials, v shaped ring, V-arrangement Seat ring adopts the polytetrafluoroethylene (PTFE) material, and it combines rubber seal and polytetrafluoroethyl-ne Alkene sealing ring advantage separately.

Claims

1, a kind of ram block shaft seal assembly, it comprises: y-type seal ring (1), v shaped ring (2), V-shape base circle (3), v shaped ring (2) is installed in the front of V-shape base circle (3), y-shaped ring (1) is installed in the front of v shaped ring (2), it is characterized in that: V-arrangement has been made in the bottom of y-shaped ring (1), coincide with the v shaped ring (2) of back, y-shaped ring (1) back and V-shape base circle (3) coincide, and the back of V-shape base circle (3) is the plane.