CN-224214152-U - Valve seat structure for underground safety valve

CN224214152UCN 224214152 UCN224214152 UCN 224214152UCN-224214152-U

Abstract

The utility model relates to the technical field of valve seats, and provides a valve seat structure for an underground safety valve, which comprises a valve seat main body, a valve plate chamber for installing a sealing valve plate, and a connecting sleeve, wherein the valve plate chamber is sleeved on the valve seat main body, threads with opposite rotation directions are arranged at two ends of the inner wall of the connecting sleeve, one end of the threads is connected with the valve seat main body, the other end of the threads is connected with the valve plate chamber, and a limiting structure for limiting relative rotation is arranged between the valve seat main body and the valve plate chamber. The utility model can effectively limit the axial relative positions of the valve seat main body and the valve plate chamber, and avoid the sealing failure caused by the generation of a gap between the valve seat main body and the sealing valve plate.

Inventors

ZHONG XIANG
WANG YUXIANG
GU CHENGJIN

Assignees

成都若克石油股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250523

Claims (7)

1. The valve seat structure for the underground safety valve comprises a valve seat main body and a valve plate chamber for installing a sealing valve plate and is characterized by further comprising a connecting sleeve, wherein the valve plate chamber is sleeved on the valve seat main body, threads with opposite rotation directions are arranged at two ends of the inner wall of the connecting sleeve, threads at one end are connected with the valve seat main body, threads at the other end are connected with the valve plate chamber, a limiting structure for limiting relative rotation is arranged between the valve seat main body and the valve plate chamber, the limiting structure comprises a limiting groove arranged on the valve seat main body and a limiting clamping block arranged on the valve plate chamber, and the limiting clamping block is matched with the limiting groove.
2. The seat structure for a subsurface safety valve according to claim 1, wherein the limit structure is a connecting key.
3. The valve seat structure for a subsurface safety valve according to claim 1 or 2, wherein through holes are provided at intervals in the circumferential direction on the side wall of the connection sleeve, and hexagon socket screws are provided in the through holes.
4. A valve seat structure for a subsurface safety valve according to claim 3, wherein the through holes are arranged in an annular array.
5. A valve seat structure for a subsurface safety valve according to claim 1 or 2, wherein the valve seat body is provided with a mounting step, and the valve plate chamber is fitted over the mounting step.
6. A seat structure for a subsurface safety valve according to claim 1 or 2, wherein the nominal diameters of the threads at both ends of the connection sleeve are equal.
7. The valve seat structure for a subsurface safety valve according to claim 1 or 2, wherein the sealing surface of the valve seat body is provided with an annular sealing groove, and an O-ring is provided in the annular sealing groove.

Description

Valve seat structure for underground safety valve Technical Field The utility model relates to the technical field of valve seats, in particular to a valve seat structure for an underground safety valve. Background The downhole safety valve is a downhole tool which is placed in a shaft, connected to an oil pipe, can prevent blowout and ensure production safety. The valve seat structure is used for installing a sealing valve plate, and generally comprises a valve seat main body and a valve plate chamber, wherein the sealing valve plate is hinged on the valve plate under the closing state of the valve and contacts with the valve seat main body under the action of a torsion spring to form a sealing pair. In the prior art (for example, patent document with publication number of CN 219176305U), the valve plate chamber and the valve seat main body are usually connected by screw threads, however, in the use process, due to factors such as impact vibration, screw threads are easy to loosen, that is, the valve seat main body and the valve plate chamber move relatively axially, so that a gap is generated between the valve seat main body and the valve plate, and normal sealing cannot be performed. Disclosure of utility model The utility model aims to provide a valve seat structure for an underground safety valve, which aims to solve the defects in the prior art. The utility model is realized by the following technical scheme: The utility model provides a disk seat structure for safety valve in pit, includes the disk seat main part and is used for installing the valve plate room of sealed valve plate, still includes the adapter sleeve, and the valve plate room cover is established in the disk seat main part, and the inner wall both ends of adapter sleeve are equipped with the screw thread that revolves to opposite directions, and the screw thread of one end is connected with the disk seat main part, and the screw thread of the other end is connected with the valve plate room, and is equipped with the limit structure of restriction relative rotation between disk seat main part and the valve plate room. Optionally, the limit structure includes locating limit groove on the disk seat main part, and locates limit fixture block on the valve plate room, limit fixture block and limit groove cooperation. Optionally, the limiting structure is a connecting key. Optionally, through holes are formed in the side wall of the connecting sleeve at intervals along the circumferential direction, and hexagon socket screws are arranged in the through holes. Optionally, the through holes are arranged in an annular array. Optionally, the valve seat main body is provided with a mounting step, and the valve plate chamber is sleeved on the mounting step. Optionally, the nominal diameters of the threads at the two ends of the connecting sleeve are equal. Optionally, the sealing surface of disk seat main part is equipped with annular seal groove, is equipped with O type sealing washer in the annular seal groove. The technical scheme of the utility model has at least the following advantages and beneficial effects: 1. in the utility model, the threads with opposite rotation directions are arranged at the two ends of the connecting sleeve, the threads at one end are connected with the valve seat main body, the threads at the other end are connected with the valve plate chamber, namely, the connecting sleeve is connected with the valve plate chamber by adopting positive and negative buckles, and the relative rotation between the valve seat main body and the valve plate chamber is limited by the limiting structure, so that after the connecting sleeve, the valve seat main body and the valve plate chamber are installed in place, the axial relative positions of the valve seat main body and the valve plate chamber can be effectively limited, and the sealing failure caused by the generation of a gap between the valve seat main body and the sealing valve plate is avoided. 2. In the utility model, the sealing valve plate and the valve seat main body are contacted to form a sealing pair, and meanwhile, an O-shaped sealing ring is arranged on the sealing surface between the sealing valve plate and the valve seat main body, and is extruded to form a sealing pair, so that double sealing is formed, and the sealing effect is improved. Drawings FIG. 1 is a schematic diagram of a valve seat structure for an underground safety valve according to the present utility model; FIG. 2 is a schematic view of an exploded construction of a valve seat body and a valve plate chamber; FIG. 3 is a schematic structural view of a connecting sleeve; The valve seat is characterized by comprising a valve seat body 1, a limiting groove 101, a valve plate chamber 2, a limiting clamping block 201, a connecting sleeve 3, a through hole 301, a sealing valve plate 4 and a hexagon socket screw 5. Detailed Description Referring to fig. 1, a valve seat structure for an underground safety valv