CN101319731A - Ultra-high pressure seawater safety valve - Google Patents

Abstract

The invention discloses an ultra-high pressure seawater safety valve. It comprises a valve body, the valve body is tubular, with a water inlet at one end and a gland fixed at the other end, a screw hole at the bottom center of the gland, and a pressure regulating screw in the screw hole. A disc, a spring and a spring seat are arranged successively between the water inlet and the gland. Its characteristic is that the inner diameter of the water inlet is smaller than the inner diameter of the valve body, and the connection between the water inlet and the inner cavity of the valve body is a conical surface, and there is a steel ball between the conical surface and the valve disc. The screw, spring seat, spring and disc are tightly pressed against the tapered surface. This ultra-high pressure seawater safety valve can not only seal the hydraulic oil medium with high viscosity, but also realize the sealing of seawater medium with low viscosity, and the scope of application is not limited. It is suitable for unloading ultra-high pressure seawater pumps in deep sea environments.

Description

Ultra-high pressure seawater safety valve

technical field

The invention relates to a safety valve. Specifically, it is an ultra-high pressure seawater safety valve that can relieve the pressure of an ultra-high pressure seawater pump in a deep sea environment.

Background technique

At present, the ultra-high-pressure seawater safety valves used to relieve the pressure of ultra-high-pressure seawater pumps in deep-sea environments are all hydraulic direct-acting safety valves. This hydraulic direct-acting safety valve adopts a slide valve structure, which can only seal the hydraulic oil medium with high viscosity, but cannot seal the seawater medium with low viscosity, so the scope of application is limited.

Contents of the invention

The problem to be solved by the present invention is to overcome the defects of the background technology and provide an ultra-high pressure seawater safety valve. This ultra-high pressure seawater safety valve can not only seal the hydraulic oil medium with high viscosity, but also realize the sealing of seawater medium with low viscosity, and the scope of application is not limited.

In order to solve the above problems, the following technical solutions are adopted:

The ultra-high pressure seawater safety valve of the present invention includes a valve body, which is tubular, has a water inlet at one end, and a gland fixed at the other end, with a screw hole at the bottom center of the gland, and a pressure regulating screw in the screw hole. Between the water inlet and the gland, there are valve clack, spring and spring seat in sequence. Its characteristic is that the inner diameter of the water inlet is smaller than the inner diameter of the valve body, and the connection between the water inlet and the inner cavity of the valve body is a conical surface, and there is a steel ball between the conical surface and the valve disc. The screw, spring seat, spring and disc are tightly pressed against the tapered surface.

Adopting the above scheme has the following advantages:

Because the inner diameter of the water inlet of the ultra-high pressure seawater safety valve of the present invention is smaller than the inner cavity diameter of the valve body, and the connection between the water inlet and the inner cavity of the valve body is a conical surface, and there is a steel ball between the conical surface and the valve disc. In the non-working state, it is tightly supported on the conical surface by means of the pressure adjusting screw, spring seat, spring and valve disc. When the outlet pressure of the seawater pump is greater than the external seawater pressure, the outlet pressure of the seawater pump will overcome the elastic force of the spring, push away the steel ball, and relieve the pressure at the outlet of the seawater pump, thereby protecting the safety of the seawater pump. And when the seawater pump is depressurized, the steel ball will return under the action of the spring to seal the outlet of the seawater pump again. It can not only seal the hydraulic oil medium with high viscosity, but also realize the sealing of seawater medium with low viscosity. Compared with the direct-acting safety valve, which can only seal the hydraulic oil medium with high viscosity, it broadens the application range and makes the application range unlimited.

Description of drawings

The accompanying drawing is a structural schematic diagram of the ultra-high pressure seawater safety valve of the present invention.

Detailed ways

As shown in the drawings, the ultra-high pressure seawater safety valve of the present invention includes a valve body 1, which is tubular, with a water inlet 8 at one end and a gland 5 fixed at the other end. The end of the gland 5 connected to the valve body 1 is respectively processed with an internal thread and an external thread, and the gland 5 is fixed with the valve body by means of the internal thread and the external thread.

The center of the cover bottom of the gland 5 is processed with a screw hole, and the screw hole is equipped with a pressure regulating screw 7. Between the water inlet 8 and the gland 5, a valve flap 3, a spring 4 and a spring seat 6 are sequentially arranged. The inner diameter of the water inlet 8 is smaller than the diameter of the inner cavity of the valve body 1, and the connection between the water inlet 8 and the inner cavity of the valve body 1 is processed into a conical surface, and a steel ball 2 is arranged between the conical surface and the valve disc 3, and the steel ball is in the non- Under the working state, the pressure-adjusting screw 7, the spring seat 6, the spring 4 and the valve disc 3 are pressed against the conical surface tightly.

Wherein the valve disc 3 is cylindrical, one end of which is offset against one end of the spring 4 , and the center of the end surface of the other end is processed with a spherical pit, and the spherical pit is offset against the steel ball 2 .

The spring seat 6 is cylindrical, one end of which is processed with a circumferential boss, the circumferential boss is located at the end adjacent to the gland 5, and its outer circle is in sliding fit with the inner circle of the valve body 1 . One end of the spring 4 is sleeved on the spring seat 6 and abuts against the circumferential boss at one end of the spring seat 6 .

A pit is also processed in the center of the end face of the spring seat 6 adjacent to the end of the gland 5, and the inner end of the pressure adjusting screw 7 is pushed in the pit. In order to facilitate the cooperation between the spring seat 6 and the pressure regulating screw 7, the pit in the center of the end face of the spring seat 6 and the end face adjacent to the gland 5 and the inner end of the pressure regulating screw 7 are all processed into a tapered shape.

Claims (4)

1. Ultra-high pressure seawater safety valve, including valve body (1), the valve body is tubular, with a water inlet (8) at one end, and a gland (5) fixed at the other end, the center of the bottom of the gland (5) There is a screw hole, and there is a pressure adjusting screw (7) in the screw hole; there are valve disc (3), spring (4) and spring seat (6) in sequence between the water inlet (8) and the gland (5); The inner diameter of the water inlet (8) is smaller than the inner cavity diameter of the valve body (1), and the connection between the water inlet (8) and the inner cavity of the valve body (1) is a conical surface, and there is a gap between the conical surface and the valve disc (3). Steel ball (2), this steel ball is tightly supported on the conical surface by means of pressure adjusting screw (7), spring seat (6), spring (4) and valve disc (3) under non-working state. 2. The ultra-high pressure seawater safety valve according to claim 1, characterized in that the valve disc (3) is cylindrical, one end of which is in contact with one end of the spring (4), and the center of the end face of the other end has a spherical depression, the The spherical pit is offset against the steel ball (2). 3. The ultra-high pressure seawater safety valve according to claim 1, characterized in that the spring seat (6) is cylindrical and has a circumferential boss at one end, and the circumferential boss is adjacent to the gland (5). One end, its outer circle and the inner circle of the valve body (1) are in a sliding fit; one end of the spring (4) is sleeved on the spring seat (6) and offset against the circumferential boss at one end of the spring seat (6). 4. The ultra-high pressure seawater safety valve according to any one of claims 1 to 3, characterized in that there is a pit in the center of the end face of the spring seat (6) adjacent to the gland (5), and the pressure regulating screw (7 ) inside the pit. 5. The ultra-high pressure seawater safety valve according to claim 4, characterized in that the pit in the center of the end face of the spring seat (6) adjacent to the gland (5) and the inner end of the pressure adjusting screw (7) are both tapered.

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