CN207621431U - A kind of check-valves of double sealing structure - Google Patents

Abstract

The utility model provides a check valve with a double sealing structure, which includes a valve body, a valve seat and a valve disc. The valve disc is fitted on the valve body through a second bushing and moves up and down along the valve body. A spring and a guide body are provided, and the guide body is fitted on the valve disc through the first bushing; the valve seat is assembled on the valve disc through fixing screws, and an O-ring is arranged between the valve seat and the valve disc; The screw is equipped with a hard-sealed sealing ring, and the hard-sealed sealing ring is equipped with a soft-sealed sealing ring through the sealing washer; there is an inclined sealing surface at the contact position between the valve seat and the valve body, and the soft-sealed sealing ring is formed by contacting the inclined sealing surface. The first seal, the hard seal seal ring contacts with the inclined sealing surface to form the second seal. The check valve described in the utility model works together through two seals, the sealing form is not easy to be damaged, the valve is not easy to leak, and the application range of the valve is expanded.

Description

A Check Valve with Double Sealing Structure

technical field

The utility model belongs to the technical field of valves, in particular to a double-sealing check valve.

Background technique

The main function of the check valve is to prevent the backflow of the medium. It is an automatic valve, which is automatically opened or closed by the flow force of the medium in the pipeline. The opening and closing part of the check valve is the disc, which is along the axis of the cavity of the valve body Move up and down. The disc is spring-loaded, and the spring can close quickly, effectively reducing the water hammer pressure, good sealing performance, forming a quiet effect, small size, light weight, small fluid resistance, and flexible opening and closing.

Existing check valves usually use one seal, which has limited sealing performance, and is prone to leakage problems in extreme environments and during long-term work.

Contents of the invention

In view of this, the utility model aims to propose a check valve with a double sealing structure to solve the problem that the existing check valve is prone to leakage.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

A check valve with a double seal structure, including a valve body, a valve seat, and a valve disc. The valve disc is fitted on the valve body through a second bushing and moves up and down along the valve body. The valve disc is provided with a spring and a guide in the direction of medium inflow. For fluid, the deflector fits on the disc through the first bushing;

The valve seat is assembled on the valve disc through fixing screws, and an O-ring is arranged between the valve seat and the valve disc;

The valve body is equipped with a hard-sealed sealing ring through the pressure plate screw, and the hard-sealed sealing ring is equipped with a soft-sealed sealing ring through the sealing washer;

There is an inclined sealing surface at the contact position between the valve seat and the valve body. The soft sealing ring contacts the inclined sealing surface to form the first seal, and the hard sealing ring contacts the inclined sealing surface to form the second seal.

Further, the inclined sealing surface of the valve seat is an arc surface.

Further, the soft seal type sealing ring is a triangular sealing ring.

Compared with the prior art, the check valve with double sealing structure described in the present invention has the following advantages: it adopts the double sealing form of soft seal and hard seal, and the triangular sealing ring presses the valve seat to form the first seal when the valve is closed. , the valve seat and the hard-sealed sealing ring constitute the second seal, the two seals work together, the seal form is not easy to be damaged, the valve is not easy to leak, it expands the scope of use of the valve, saves the cost of the valve, and can be used in most cycles work on the water system;

The valve seat structure is assembled with fixing screws, and the hard-sealed sealing ring is assembled with pressure plate screws. The replacement of the valve seat and sealing ring saves time and effort, and can also prolong the service life of the valve;

The sealing surface of the valve seat is an arc-shaped circular surface, which can reduce the impact of the water hammer on the valve seat caused by the sudden increase of the fluid flow rate during the normal operation of the valve, and improve the service life of the valve seat.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic structural view of a check valve with a double sealing structure described in an embodiment of the present invention;

Fig. 2 is a partial schematic diagram of the double sealing structure described in the embodiment of the present invention.

Explanation of reference signs:

1-valve body; 2-guiding body; 3-first bushing; 4-spring; 5-O-ring; 6-soft sealing ring; 7-pressure plate screw; 8-hard sealing ring; 9 -valve seat; 10-fixing screw; 11-disc; 12-second bushing; 13-sealing washer.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention Creation and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The invention will be described in detail below with reference to the accompanying drawings and examples.

The technical problem to be solved by this technical solution is: the existing check valve usually uses one seal, which has limited sealing performance, and is prone to leakage problems in extreme environments and during long-term work.

In order to solve the above technical problems, as shown in Figure 1, this embodiment provides a check valve with a double sealing structure, including a valve body 1, a valve seat 9, and a valve disc 11, and the valve disc 11 is assembled through a second bush 12 On the valve body 1 and moves up and down along the valve body 1, the valve disc 11 is provided with a spring 4 and a guide body 2 in the direction of medium inflow, and the guide body 2 is assembled on the valve disc 11 through the first bush 3; the valve seat 9 is fixed by The screw 10 is assembled on the disc 11, and an O-ring 5 is provided between the valve seat 9 and the disc 11; the valve body 1 is equipped with a hard-sealed sealing ring 8 through the pressure plate screw 7, and the hard-sealed sealing ring 8 passes through The sealing gasket 13 is equipped with a soft sealing ring 6; as shown in Figure 2, an inclined sealing surface is provided at the contact position between the valve seat 9 and the valve body 1, and the soft sealing ring 6 contacts with the inclined sealing surface to form the first seal. , The hard seal seal ring 8 is in contact with the inclined sealing surface to form a second seal. The soft seal type sealing ring 6 is a triangular sealing ring.

The technical effect of the technical solution provided by this embodiment is: the double sealing form of soft seal and hard seal is adopted, the triangular sealing ring presses the valve seat 9 to form the first seal when the valve is closed, and the valve seat 9 is sealed with the hard seal Ring 8 constitutes the second seal, the two seals work together, the seal form is not easy to be damaged, and the valve is not easy to leak, which expands the scope of use of the valve, saves the cost of the valve, and can be applied to the work of most circulating water systems; The structure of seat 9 is assembled with fixing screws 10, and the hard-sealed sealing ring 8 is assembled with pressure plate screws 7. The replacement of valve seat 9 and sealing ring saves time and effort, and can also prolong the service life of the valve.

The inclined sealing surface of the valve seat 9 is an arc-shaped surface, and the sealing surface of the valve seat 9 is an arc-shaped circular surface, which can reduce the impact of the water hammer on the valve seat 9 caused by the sudden increase of the fluid flow rate during the normal operation of the valve. , improve the service life of the valve seat 9.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the Within the scope of protection of the present invention.

Claims (3)

1. a kind of check-valves of double sealing structure, including valve body, valve seat, flap, flap are assemblied in valve body by the second bushing Above and along valve body upper and lower displacement, flap is provided with spring and baffle in medium inflow direction, and baffle is filled by the first bushing It fits on flap, it is characterised in that：

Valve seat is assemblied in by fixing screws on flap, and O-ring seal is equipped between valve seat and flap；

Hard sealed sealing ring is equipped with by bridge screw on valve body, hard sealed sealing ring is equipped with soft by seal washer Sealed sealing ring；

Valve seat contacts to form first with angular sealing surface with angular sealing surface, soft sealing type sealing ring is equipped at valve body contact position Road seals, and hard sealed sealing ring contacts to form second sealing with angular sealing surface.

2. a kind of check-valves of double sealing structure according to claim 1, it is characterised in that：The angular sealing surface of valve seat For arcwall face.

3. a kind of check-valves of double sealing structure according to claim 1, it is characterised in that：Soft sealing type sealing ring is Delta-ring.