Multi-pendulum type automatic centering valve clack sealing structure

Abstract

The application discloses a multi-pendulum type automatic centering sealing valve disc structure, which comprises a valve disc and a valve disc seat, and the upper end of the main body of the valve disc is a valve disc head which is a spherical tank body; the valve disc and the valve disc seat are connected in a centering mode, and a swing gap is left between the valve disc and the valve disc seat which are adjacent to each other and is used for swing alignment of the valve disc head. The application solves the problem that the sealing of the valve is damaged by the medium impact force in the fast movement, thereby achieving reliable sealing of the fast movement valve.

Description

Technical Field

[0001] This invention relates to the field of valve manufacturing technology, specifically to a multi-swing type automatic centering sealing valve disc structure. Background Technology

[0002] With the rapid development of my country's industrialization, various industrial enterprises are increasing day by day, and the pollution caused to the environment is also becoming more and more serious. In order to prevent environmental pollution, the use of valves has greatly increased. However, valve leakage and failure often occur in some harsh working conditions.

[0003] The sealing valve disc is a very critical part of the valve. If it does not close tightly, it will affect the valve's ability to cut off the medium, which is called internal leakage. Internal leakage is not allowed for shut-off valves. Summary of the Invention

[0004] This invention provides a multi-swing automatic centering valve disc sealing structure to prevent the valve disc from being damaged by the impact force of the medium during rapid valve movement, thus preventing internal leakage.

[0005] The technical solution adopted in this invention is:

[0006] A multi-swing automatic centering sealing valve structure includes a valve disc and a valve disc seat. The upper end of the main body of the valve disc is a valve disc head, which is a spherical tank body. It is used to center and connect with the valve disc seat. A swing gap is left between the valve disc and the valve disc seat for the valve disc head to swing and align.

[0007] Spring holes are evenly distributed on the end face of the valve seat adjacent to the valve disc and the valve disc seat, and a preload spring is installed in the spring hole.

[0008] After the pin passes through the hole on the valve disc head, it is inserted into the hole in the valve disc seat, and the other end of the pin is positioned with a set screw.

[0009] The sealing surface at the lower part of the valve disc body is arc-shaped.

[0010] This invention solves the problem of internal leakage in valve discs caused by the impact of the medium damaging the seal during rapid movement of the valve closing element, thus achieving reliable sealing in rapidly moving valves. The reliable sealing of the valve disc not only saves resources and energy and improves work efficiency, but also reflects the advancement of modern sealing technology. As a general-purpose mechanical device, this invention plays a vital role in various industrial fields such as petroleum, chemical, aerospace, shipbuilding, power, and metallurgy. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve seat of the present invention;

[0013] Figure 3 for Figure 2 AA section view in the middle;

[0014] Figure 4 This is a schematic diagram of the valve disc structure of the present invention. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Reference Figure 1-4 A multi-swing type automatic centering sealing valve structure includes a valve disc 2 and a valve disc seat 1. The upper end of the main body of the valve disc 2 is a valve disc head 2-1, which is in the shape of a spherical tank. It is used to center and connect with the valve disc seat 1 to realize the automatic centering of the valve disc sealing surface. A swing gap is left at the adjacent position of the valve disc 2 and the valve disc seat 1 for the valve disc head 2-1 to swing and align.

[0017] The swing gap is achieved by the preload of the spring. Spring holes 1-1 are evenly distributed on the end face of the valve seat 1 adjacent to the valve disc 2 and valve seat 1, and a preload spring 4 is installed in each spring hole 1-1. When the valve disc 2 and valve seat 1 are installed, a gap remains between the end face of the valve disc 2 and the end face of the valve seat 1 due to the preload of the spring 4. This allows the sealing element to move radially to a limited extent, satisfying the fit with the sealing surface. The preload spring 4 also ensures the coaxiality of the valve disc 2 with the valve seat under the sealing force.

[0018] The connection structure between valve disc 2 and valve disc seat 1 is as follows: pin 3 passes through hole 2-2 on valve disc head 2-1 and is inserted into hole in valve disc seat 1. The other end of pin 3 is positioned by set screw 5. Pin 3 serves to connect valve disc 2 and valve disc seat 1, and set screw 5 positions pin 3 to prevent pin from flying out. A gap exists between hole 2-2 on valve disc 2 and pin 3 to ensure that pin 3 does not bear the impact force of valve disc 2 or the shear force generated by valve disc 2 during operation when the valve disc is opening or sealing. This ensures the service life of pin 3 and guarantees that pin 3 only serves a connecting function and does not bear any force.

[0019] The valve disc 2 sealing surface 2-3 and the valve seat are connected by a circular arc. This allows the medium to flow smoothly along the tangent of the circular arc without any flow resistance. It also allows the medium to flow out along the tangent of the circular arc without eroding the pin, thus reducing the corrosion of the pin.

Claims

1. A multi-pendulum self-aligning sealing disc structure comprising a sealing disc and a sealing disc seat, characterized in that, The upper part of the main body of the valve disc (2) is the valve disc head (2-1), which is a spherical tank body; it is used to connect with the valve disc seat (1) in a centered manner. There is a swing gap between the valve disc (2) and the valve disc seat (1) for the valve disc head (2-1) to swing and align. Spring holes (1-1) are evenly distributed on the end face of the valve disc seat (1) at the adjacent position of the valve disc (2) and the valve disc seat (1). A preload spring (4) is installed in the spring hole (1-1).

2. A multiple pendulum self-aligning sealing disc structure according to claim 1, characterized in that: The pin (3) passes through the hole (2-2) on the valve disc head (2-1) and is inserted into the hole of the valve disc seat (1). The other end of the pin (3) is positioned by the set screw (5).

3. A multiple pendulum self-aligning sealing disc structure according to claim 1, characterized in that: The sealing surface (2-3) at the lower part of the valve disc (2) body is arc-shaped.

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