CN216895951U

CN216895951U - Plate valve sealing structure

Info

Publication number: CN216895951U
Application number: CN202220323765.9U
Authority: CN
Inventors: 兰宏刚; 刘建利
Original assignee: Baoji Keyuan Petroleum Equipment Co ltd
Current assignee: Baoji Keyuan Petroleum Equipment Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-07-05
Anticipated expiration: 2032-02-17

Abstract

The plate valve sealing structure comprises an annular sealing body and a sealing ring, wherein the outer wall of the annular sealing body is of a step-shaped structure, so that the diameter of the outer wall of the upper part of the annular sealing body is larger than that of the outer wall of the lower part of the annular sealing body, and an annular shoulder is formed at the joint of the outer wall of the upper part and the outer wall of the lower part; the middle part of the outer wall of the upper part is provided with an annular sealing groove, a combined sealing ring is sleeved in the annular sealing groove, and the middle part of the outer wall of the lower part protrudes outwards to form an annular convex edge; the middle part of the inner wall of the sealing ring is provided with an annular groove matched with the annular convex edge, the sealing ring is sleeved on the outer wall of the lower part, the upper end of the sealing ring is abutted against the annular circular bead, and the lower end of the sealing ring extends out of the end surface of the outer wall of the lower part, so that the annular convex edge is clamped into the annular groove. The present invention overcomes the deficiencies of the prior art.

Description

Plate valve sealing structure

Technical Field

The utility model belongs to the technical field of plate valves, and particularly relates to a plate valve sealing structure.

Background

The bivalve check valve is a standard coiled tubing string component, when the coiled tubing string or ground equipment breaks down or is damaged, the bivalve check valve can prevent underground liquid from flowing back into the tubing, and two sets of plate valves are designed inside the bivalve check valve. The sealing body and the valve body of the existing plate valve are sealed by radially arranging a sealing ring, and the valve plate and the sealing body are sealed by an O-shaped sealing ring arranged on the end face; secondly, the risk that other instruments normally operate is influenced by jamming, blocking and the like after the fallen sealing ring falls into the underground.

SUMMERY OF THE UTILITY MODEL

The utility model provides a plate valve sealing structure which overcomes the defects of the prior art.

The technical scheme adopted by the utility model is as follows: a plate valve sealing structure comprises an annular sealing body and a sealing ring, wherein the outer wall of the annular sealing body is of a step-shaped structure, so that the diameter of the outer wall of the upper part of the annular sealing body is larger than that of the outer wall of the lower part of the annular sealing body, and an annular shoulder is formed at the joint of the outer wall of the upper part and the outer wall of the lower part; the middle part of the outer wall of the upper part is provided with an annular sealing groove, a combined sealing ring is sleeved in the annular sealing groove, and the middle part of the outer wall of the lower part protrudes outwards to form an annular convex edge; the inner wall middle part of sealing washer be equipped with the annular groove of annular protruding edge adaptation, the sealing washer suit is in on the outer wall of lower part, and the upper end of sealing washer offsets with annular circular bead, the terminal surface that the lower extreme stretches out the outer wall of lower part to make the annular protruding edge card go into in the annular groove.

The annular convex edge and the annular groove are both conical structures, and the upper end surface of the annular convex edge and the top surface of the annular groove are both planes.

The lower end of the sealing ring is provided with an annular sealing lip, and the end face of the annular sealing lip extends out of the end face of the outer wall of the lower part.

The combined sealing ring is composed of a groove type sealing ring and an O-shaped sealing ring embedded in the groove type sealing ring.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the sealing ring matched with the plate valve sealing body in an anti-slip manner is designed, so that a novel sealing structure is formed, the sealing ring can be effectively prevented from falling off automatically after the plate valve is opened, and the risk that other tools are influenced by blockage, blockage and the like caused by sealing failure of the plate valve and falling of the sealing ring is solved.

2. The novel sealing structure formed by the utility model can ensure normal high-low pressure sealing of the tool, greatly improve the working efficiency on site, reduce the use cost and obtain good economic and social benefits.

Drawings

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

FIG. 2 is a schematic view of the annular seal construction of the present invention;

FIG. 3 is a schematic view of the seal ring structure of the present invention;

fig. 4 is a schematic view of the use state of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying fig. 1 to 4 and the embodiments.

A plate valve sealing structure comprises an annular sealing body 1 and a sealing ring 2, wherein the outer wall of the annular sealing body 1 is of a step-shaped structure, so that the diameter of the outer wall 1-1 at the upper part of the annular sealing body 1 is larger than that of the outer wall 1-2 at the lower part of the annular sealing body 1, and an annular shoulder 1-5 is formed at the joint of the outer wall 1-1 at the upper part and the outer wall 1-2 at the lower part; the middle part of the upper outer wall 1-1 is provided with an annular sealing groove 1-3, a combined sealing ring 3 is sleeved in the annular sealing groove 1-3, and the middle part of the lower outer wall 1-2 protrudes outwards to form an annular convex edge 1-4; the middle part of the inner wall of the sealing ring 2 is provided with an annular groove 2-1 matched with the annular convex edge 1-4, the sealing ring 2 is sleeved on the outer wall 1-2 of the lower part, the upper end of the sealing ring 2 is abutted against the annular shoulder 1-5, the lower end of the sealing ring extends out of the end face of the outer wall 1-2 of the lower part, and the annular convex edge 1-4 is clamped into the annular groove 2-1.

The combined sealing ring 3 is composed of a groove-shaped sealing ring 3-1 and an O-shaped sealing ring 3-2 embedded in the groove-shaped sealing ring 3-1.

In a preferred embodiment, the annular convex edge 1-4 and the annular groove 2-1 are both in a conical structure, and the upper end surface of the annular convex edge 1-4 and the top surface of the annular groove 2-1 are both flat surfaces. Not only can make 2 simple to operate swiftly of sealing washer, the antiskid is taken off the effect better moreover.

Further, in order to be more beneficial to deformation sealing of the sealing ring 2, the lower end of the sealing ring 2 is provided with an annular sealing lip 2-2, and the end face of the annular sealing lip 2-2 extends out of the end face of the lower outer wall 1-2.

FIG. 4 is a plate valve structure diagram of a most commonly used double-flap check valve in a coiled tubing tool, when in use, the lower part of an annular sealing body 1 is inserted into the upper end of a valve body 4, so that the valve body 4 and the outer wall 1-2 of the lower part of the annular sealing body 1 are sealed by a sealing ring 2, a valve plate 5 is hinged in the valve body 4 through a pin shaft 6, and the upper end of the valve plate 5 is tightly abutted against an annular sealing lip 2-2 arranged at the lower end of the sealing ring 2 under the action of a torsion spring 7, so that the plate valve is in a normally closed state; when fluid needs to be injected from the upper part of the tool or the tool needs to be put into the drift diameter, the pressure of the fluid or the gravity of the tool overcomes the resistance of the torsion spring 7 to enable the valve plate 5 to rotate downwards to be opened, and when the valve plate 5 is opened, the sealing ring 2 forms an anti-slip structure through the matching of the annular convex edge 1-4 and the annular groove 2-1, so that the problem that the sealing ring in the conventional structure falls off and loses sealing after going into the well is effectively solved; when the pressure at the bottom of the well is higher than the pressure in the pipe column, the underground pressure pushes the valve plate 5 to press the lower end surface of the sealing ring 2, and the lower end surface of the sealing ring 2 is pressed and deformed to be tightly attached to the end surface of the valve plate 3 to form sealing; the lower end of the sealing ring 2 is provided with an annular sealing lip 2-2 which is more beneficial to the deformation sealing of the sealing ring, and the sealing formed by the elastic deformation of the sealing ring 2 and the valve plate 5 is mainly used for low-pressure sealing; when the underground pressure continues to rise, the valve plate 5 continues to compress the sealing ring 2 until the sealing ring is tightly attached to the lower end face of the annular sealing body 1 to form rigid sealing for high-pressure sealing.

The above-mentioned embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the scope of the utility model, and therefore all equivalent variations made by the following claims should be included in the scope of the utility model.

Claims

1. The utility model provides a board valve seal structure, includes annular seal body (1), sealing washer (2), its characterized in that: the outer wall of the annular sealing body (1) is of a step-shaped structure, the diameter of the outer wall (1-1) at the upper part of the annular sealing body (1) is larger than that of the outer wall (1-2) at the lower part of the annular sealing body (1), and an annular shoulder (1-5) is formed at the joint of the outer wall (1-1) at the upper part and the outer wall (1-2) at the lower part; an annular sealing groove (1-3) is formed in the middle of the upper outer wall (1-1), a combined sealing ring (3) is sleeved in the annular sealing groove (1-3), and the middle of the lower outer wall (1-2) protrudes outwards to form an annular protruding edge (1-4); the inner wall middle part of sealing washer (2) be equipped with annular groove (2-1) of the protruding edge of annular (1-4) adaptation, sealing washer (2) suit is in on lower part outer wall (1-2), and the upper end of sealing washer (2) offsets with annular circular bead (1-5), the lower extreme stretches out the terminal surface of lower part outer wall (1-2) to make the protruding edge of annular (1-4) card go into annular groove (2-1).

2. A plate valve sealing structure according to claim 1, wherein: the annular convex edge (1-4) and the annular groove (2-1) are both in a conical structure, and the upper end surface of the annular convex edge (1-4) and the top surface of the annular groove (2-1) are both flat surfaces.

3. A plate valve sealing structure according to claim 1 or 2, wherein: the lower end of the sealing ring (2) is provided with an annular sealing lip (2-2), and the end face of the annular sealing lip (2-2) extends out of the end face of the lower outer wall (1-2).

4. A plate valve sealing structure according to claim 3, wherein: the combined sealing ring (3) is composed of a groove type sealing ring (3-1) and an O-shaped sealing ring (3-2) embedded in the groove type sealing ring (3-1).