CN213575744U

CN213575744U - Check valve

Info

Publication number: CN213575744U
Application number: CN202022491475.9U
Authority: CN
Inventors: 刘新发
Original assignee: Kunshang Multiply Machinery Co ltd
Current assignee: Kunshang Multiply Machinery Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-29
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a check valve, concretely relates to purifier check valve technical field, include the check valve body, prevent plug, sealing washer against the current, the up end of check valve body sets up counter bore one, the lower terminal surface of check valve body sets up counter bore two, set up the annular ring between counter bore one and the counter bore two, and the centre bore, the centre bore is located the inside of annular ring, set up in the centre bore prevent the plug against the current, prevent plug against the current and centre bore clearance fit, the lateral wall of check valve body sets up the annular groove, the sealing washer sets up in the annular groove. The utility model discloses simple structure, the leakproofness is good, convenient to detach to can prevent the medium backward flow under certain water pressure.

Description

Check valve

Technical Field

The utility model relates to a check valve technical field, more specifically says, the utility model relates to a purifier check valve technical field.

Background

The check valve is a valve which automatically opens and closes a valve flap by medium flowing, and is used for preventing the medium from flowing backwards, and is also called a check valve, a one-way valve, a reflux valve and a back pressure valve.

At present, a check valve is widely used as an important part of a water purifier, the problem of water leakage can be solved by the existing water purifier, and the defects can be overcome by additionally arranging the check valve between pure water and waste water in the water purifier. The existing check valve has the problems of small drainage channel, low sealing performance due to the fact that impurities are easily adhered to the valve, difficulty in mounting and dismounting and the like due to the defects of the designed structure and materials, so that the existing check valve is poor in drainage and check effects, inconvenient to use and clean and influenced in water purification quality.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a check valve, the device simple structure, the leakproofness is good, convenient to detach to can prevent the medium backward flow under certain water pressure, be fit for using widely, with the problem of mentioning in the solution background art.

The technical scheme of the utility model is that:

the utility model provides a check valve, includes the check valve body, prevents plug, sealing washer against current, the up end of check valve body sets up counter bore one, the lower terminal surface of check valve body sets up counter bore two, set up the annular ring between counter bore one and the counter bore two, and the centre bore, the centre bore is located the inside of annular ring, set up in the centre bore prevent the plug against current, prevent plug against current and centre bore clearance fit, the lateral wall of check valve body sets up annular groove, the sealing washer sets up in annular groove.

In a preferred embodiment, the backflow prevention plug comprises a plug rod and a plug seat, the plug rod comprises a plug rod upper section, a plug rod convex circle and a plug rod lower section, the plug rod convex circle is formed between the plug rod upper section and the plug rod lower section, the plug seat is located at one end, away from the plug rod convex circle, of the plug rod lower section, the diameter of the plug rod convex circle is larger than that of the center hole, and the plug seat is in clearance fit with the counter bore.

In a preferred embodiment, the backflow prevention plug is a rubber plug or a silicon rubber plug or a fluorine rubber plug or an EPDM plug.

In a preferred embodiment, the diameter of the plug seat is greater than the outer diameter of the annular bore.

In a preferred embodiment, the length of the lower section of the stopper rod is greater than the length of the central bore.

The utility model has the beneficial technical effects that:

one end of the first counter sink is a water inlet end, one end of the second counter sink is a water outlet end, and the medium is allowed to flow towards one direction under certain water pressure.

Drawings

Fig. 1 is a schematic sectional structure view of a check valve.

Fig. 2 is a schematic structural view of the reverse flow preventing plug.

The reference signs are: 1 check valve body, 2 annular holes, 3 countersunk holes II, 4 anti-reflux plugs, 5 countersunk holes I, 6 annular grooves, 7 sealing rings, 8 central holes, 9 plug rod upper sections, 10 plug rod convex circles, 11 plug rod lower sections and 12 plug seats

Detailed Description

In order to make the technical means of the present invention clearer and to implement the present invention according to the content of the specification, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples, which are used for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the utility model provides a check valve, including check valve body 1, anti-reflux plug 4, sealing washer 7, the up end of check valve body 1 sets up counter bore one 5, the lower terminal surface of check valve body 1 sets up counter bore two 3, set up annular hole 2 between counter bore one 5 and counter bore two 3, and central hole 8, central hole 8 is located the inside of annular hole 2, set up in central hole 8 anti-reflux plug 4, anti-reflux plug 4 and central hole 8 clearance fit, the lateral wall of check valve body 1 sets up annular groove 6, sealing washer 7 sets up in annular groove 6;

further, referring to fig. 1-2, the backflow prevention plug 4 comprises a plug rod and a plug seat 404, the plug rod comprises a plug rod upper section 401, a plug rod convex circle 402 and a plug rod lower section 403, the plug rod convex circle 402 is formed between the plug rod upper section 401 and the plug rod lower section 403, the plug seat 404 is located at one end of the plug rod lower section 403 far away from the plug rod convex circle 402, the diameter of the plug rod convex circle 402 is larger than that of the central hole 8, the plug seat 404 is in clearance fit with the second 3 countersunk holes, and the plug rod convex circle blocks the central hole, so that the plug rod is not easy to fall off;

further, referring to fig. 2, the backflow prevention plug 4 is a rubber plug or a silicon rubber plug or a fluorine rubber plug or an EPDM plug, the EPDM is ethylene propylene diene monomer, and the ethylene propylene diene monomer is a terpolymer of ethylene, propylene and non-conjugated diene, so that the backflow prevention plug is convenient to detach.

Further, referring to fig. 2, the diameter of the plug seat 404 is larger than the diameter of the outer circle of the annular hole 2, so that reverse water pressure is prevented from reversely flowing in through the annular through hole;

further, referring to fig. 2, the length of the lower segment 402 of the stopper rod is greater than the length of the central bore 8, so that the annular through hole and the counter bore form a passage for forward water flow.

The utility model discloses the theory of operation:

the plug rod convex circle material is soft and has certain elasticity, the plug rod convex circle penetrates through the center hole of the check valve body, the plug rod convex circle blocks the center hole of the check valve body to enable the plug rod convex circle not to easily fall off, the water flow direction flows in as shown in figure 1, the annular hole on the periphery of the check valve body is flushed through the annular hole under the action of water pressure, the anti-backflow plug is opened, raw water smoothly flows in, when the reverse water pressure is larger than the inflow water pressure, the anti-backflow plug is tightly attached to the water outlet face of the check valve body to plug the water outlet hole, the reverse flow of water is blocked, and the function of the anti-.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A check valve characterized by: the check valve comprises a check valve body (1), a backflow prevention plug (4) and a sealing ring (7), wherein a first counter bore (5) is formed in the upper end face of the check valve body (1), a second counter bore (3) is formed in the lower end face of the check valve body (1), an annular hole (2) and a central hole (8) are formed between the first counter bore (5) and the second counter bore (3), the central hole (8) is located inside the annular hole (2), the backflow prevention plug (4) is arranged in the central hole (8), and the backflow prevention plug (4) is in clearance fit with the central hole (8);

the side wall of the check valve body (1) is provided with an annular groove (6), and the sealing ring (7) is arranged in the annular groove (6).

2. A non-return valve according to claim 1, characterized in that: the anti-backflow plug (4) comprises a plug rod and a plug seat (404), the plug rod comprises a plug rod upper section (401), a plug rod convex circle (402) and a plug rod lower section (403), the plug rod convex circle (402) is formed between the plug rod upper section (401) and the plug rod lower section (403), the plug seat (404) is located at one end, away from the plug rod lower section (403), of the plug rod convex circle (402), the diameter of the plug rod convex circle (402) is larger than that of the center hole (8), and the plug seat (404) is in clearance fit with the second counter bore (3).

3. A non-return valve according to claim 2, characterized in that: the anti-reflux plug (4) is a rubber plug.

4. A non-return valve according to claim 2, characterized in that: the diameter of the plug seat (404) is larger than the diameter of the outer circle of the annular hole (2).

5. A non-return valve according to claim 2, characterized in that: the length of the lower section (403) of the plug rod is larger than that of the central hole (8).