CN205226515U - Guide's balanced type cage type adjusting valve valve clack structure - Google Patents

Abstract

A disc structure of a pilot balanced cage-type regulating valve, which mainly includes a main valve disc, a pilot valve disc, a limit gland, and a spring. The main valve disc has a pilot hole, and the pilot valve disc The spring is placed in the pilot hole in the main valve disc and matched with the valve seat on the pilot hole. The upper part of the pilot valve disc is equipped with a limit gland fixed on the main valve disc to limit the position of the pilot valve disc. ; The main valve disc and the limit gland are respectively provided with pressure balance holes; the limit gland is crimped on the pilot valve disc from above, and is fixed on the main valve disc from above by bolts ; The upper side wall of the pilot valve disc is also equipped with screws for fixing; when the control valve is opened, the spring drives the small valve disc to act to achieve the leading role of the valve disc opening; it has a simple and light structure of the valve disc. It is convenient, has a long service life, and ensures good sealing of the valve under high pressure conditions, and flexible opening and closing of the valve.

Description

Disc structure of pilot balanced cage control valve

technical field

The utility model relates to a novel disc structure of a pilot balance type cage regulating valve, in particular to a valve disc structure for a cage regulating valve with a high opening and closing pressure difference, and belongs to the technical field of valves.

Background technique

In the existing cage-type control valve disc structure, there is a pressure balance hole on the disc, and the seal is composed of two parts, one is the sealing surface of the disc sealing surface and the valve seat of the control valve, and the other is the seal between the disc and the seat of the control valve. Metal cages are sealed with non-metallic sealing rings. The disc structure of the cage control valve still requires the actuator of the control valve to provide a large sealing force under high pressure conditions. At the same time, non-metallic materials are easy to wear during the frequent opening and closing of the control valve, resulting in sealing failure and reducing the use of the valve. life.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the existing valve clack structure, and provide a valve clack with simple and light structure, convenient disassembly, long service life, and good sealing of the valve under high pressure conditions, and flexible opening and closing of the valve Advanced pilot balance cage control valve disc structure.

The purpose of this utility model is accomplished through the following technical solutions, a pilot balanced cage valve flap structure, which mainly includes a main valve flap, a pilot valve flap, a limit gland, and a spring. There is a pilot hole on the valve clack, the pilot valve clack is placed in the pilot hole in the main valve clack through a spring and matches with the valve seat on the pilot hole, the upper part of the pilot valve clack is installed and fixed on the main valve There are pressure balance holes on the main valve disc and the limit gland respectively; when the control valve is opened, the spring drives the small valve disc to move to reach the position of the valve. Pilot action for valve opening.

As a preference: the limiting gland is crimped on the pilot valve disc from above, and fixed on the main valve disc from above by bolts; the upper side wall of the pilot valve disc is also equipped with screws for fixing .

The utility model belongs to an improvement on the prior art. It has the characteristics of simple and light valve disc structure, convenient disassembly, long service life, good sealing of the valve under high-pressure working conditions, and flexible opening and closing of the valve.

Description of drawings

Fig. 1 is a structural schematic diagram of the valve clack utility model.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings: as shown in Figure 1, a kind of pilot balance type cage regulating valve disc structure described in the utility model mainly includes a main valve disc 1, a pilot valve disc 2, Limiting gland 4, and spring 3, there is pilot hole on the described main valve flap 1, and described pilot valve flap 2 is placed in the pilot hole in main valve flap 1 by spring 3 and is connected with the pilot hole on the pilot hole. The valve seat is matched, and the upper part of the pilot valve disc 2 is installed with a limit gland 4 fixed on the main valve disc 1 to limit the pilot valve disc; the main valve disc 1 and the limit gland 4 are There are pressure balance holes respectively.

As shown in the figure, the limiting gland 4 is crimped on the pilot valve disc 2 from above, and is fixed on the main valve disc 1 from above by bolts 5; the upper side wall of the pilot valve disc 2 It is also equipped with screws 6 for fixing.

Claims (2)

1. A pilot balance type cage regulating valve disc structure, which mainly includes a main valve disc, a pilot valve disc, a limit gland and a spring, is characterized in that the main valve disc has a pilot hole, and the The pilot valve disc is placed in the pilot hole in the main valve disc through a spring and matches with the valve seat on the pilot hole. The upper part of the pilot valve disc is fixed on the main valve disc to limit the position of the pilot valve disc. Limiting gland: The main valve disc and the limiting gland are respectively provided with pressure balance holes. 2. The disc structure of the pilot balanced cage control valve according to claim 1, characterized in that the limiting gland is crimped on the pilot valve disc from above, and is fixed on the main valve disc by bolts from above. On the valve disc; the upper side wall of the pilot valve disc is also equipped with screws for fixing.