CN213541424U

CN213541424U - Water inlet valve for preventing sewage from flowing back

Info

Publication number: CN213541424U
Application number: CN202021507536.XU
Authority: CN
Inventors: 方玉萍; 梁宁; 王阵; 汪磊敏; 王君; 杨振东
Original assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Current assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-06-25
Anticipated expiration: 2030-07-27

Abstract

The utility model provides a water intaking valve for preventing sewage backward flow belongs to water intaking valve technical field. The water inlet valve comprises a valve body, the valve body is provided with a water inlet and a first water outlet channel, at least one non-return device is arranged in the first water outlet channel, the non-return device comprises a shell and a water return prevention piece, a first sealing piece is arranged between the inner wall of the shell and the inner wall of the first water outlet channel, the shell is provided with a plurality of second water outlet channels, the water return prevention piece is provided with a water return prevention pad made of elastic materials, when the water inlet is not communicated with water, the water outlet end of the second water outlet channel is closed by the water return prevention pad, when the water inlet is communicated with water, the water return prevention pad is bent under the hydraulic flushing, and the second water outlet channel is opened. The utility model has the advantages of effectively preventing sewage from flowing back.

Description

Water inlet valve for preventing sewage from flowing back

Technical Field

The utility model belongs to the technical field of the water intaking valve, in particular to a water intaking valve for preventing sewage backward flow.

Background

In the existing household appliances such as washing machines, dish washing machines, intelligent toilets and the like, a water valve is needed to control the water inlet and outlet and the water flow, and because the water pressure has small difference in different areas and unstable water pressure exists in some areas. When no water pressure exists, the water pressure is unstable or the water inlet pressure drops sharply, negative pressure can be generated at the water inlet end and the water outlet end of the household appliance, and the water in the household appliance flows back due to the siphoning phenomenon generated under the action of the negative pressure, so that the water resource at the water inlet end is polluted by the back-flowing water body.

In the prior art, although different technical solutions are adopted to solve the problems of water body backflow and the like, for example, a check valve or a floating ball is arranged at the water inlet end, the check valve is arranged at the water inlet end, and the defects that the water pressure at the water inlet end is the largest and the water pressure at the water outlet end is smaller than that at the water inlet end in the water feeding process of the water inlet valve are that the check valve is arranged at the water inlet end, so that water easily flushes and displaces the check valve, and the check valve leaks water. The floating ball structure has the defects that the sealing performance of the floating ball type is controlled through the return water pressure, if the return water pressure is insufficient, the sealing effect is poor, and the sewage backflow cannot be effectively prevented.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a water intaking valve for preventing sewage backward flow.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a water intaking valve for preventing sewage backward flow, its characterized in that, includes the valve body, the valve body be provided with water inlet and first water outlet channel, first water outlet channel in be provided with at least one backstop, backstop include casing and anti-return piece, casing and first water outlet channel inner wall between be provided with first sealing member, the casing seted up a plurality of second water outlet channels, anti-return piece be provided with the anti-return water pad that adopts elastic material to make, work as the water inlet when not logical water, the anti-return water pad close the play water end of second water outlet channel, work as the water inlet when logical water, the anti-return water pad bend under hydraulic washing for second water outlet channel opens.

The utility model discloses a theory of operation: the utility model discloses the during operation is equipped with first sealing member with backstop dress in first exhalant canal between casing and the first exhalant canal inner wall, the setting of first sealing member, prevents that water from passing through between first exhalant canal and the casing, and water can only follow the second exhalant canal process on the casing. When water flows into the valve body from the water inlet, the water flow impacts the water return prevention cushion, the water return prevention cushion is bent under the flushing of the water pressure, the second water outlet channel is opened, the non-return device is in an opening state, and the valve body discharges water. When the water inlet stops feeding water, the anti-backwater cushion is made of elastic materials, and under the action of the rebounding force, the anti-backwater cushion is restored to the initial state, and the water outlet end of the second water outlet channel is closed, so that the sewage cannot flow back. The utility model discloses simple structure, and in backstop located first water outlet channel, water flowed to first water outlet channel in, it is little to compare in the water pressure of water inlet department, and backstop is difficult to be shifted by the water impact, because the setting of first sealing member for water can not follow and pass through between first water outlet channel and the casing, and has adopted the resilience force of preventing the backwater pad to make and prevent the backwater pad and seal the delivery port, can effectively prevent the sewage backward flow.

Preferably, the anti-backflow cushion is arched towards the end far away from the second water outlet channel.

Preferably, the backwater preventing piece is provided with a fixing column, the fixing column is fixedly connected with the backwater preventing pad, the shell is provided with a fixing channel, and the fixing column is in interference fit with the fixing channel. Adopt interference fit to assemble the waterproof part and the shell together, the assembly method is simple, and the equipment is convenient.

Preferably, the number of the first water outlet channel reverse stopping devices is two. The sewage backflow can be effectively prevented by double backwater prevention.

Preferably, the outer wall of the shell is provided with a clamping convex block used for being clamped with the inner wall of the first water outlet channel. The shell is clamped with the first water outlet channel through the clamping convex block, the connecting structure is simple, and the assembly mode of the non-return device and the valve body is simple.

Preferably, the outer wall of the shell is provided with an annular limiting groove for embedding the first sealing element. The annular limiting groove is used for limiting the position of the first sealing element and preventing the first sealing element from moving.

Preferably, the first sealing element is an O-shaped rubber ring.

Preferably, the annular edge of the anti-backflow cushion is positioned at the outer side of the second water outlet channel. So that the water return prevention pad can completely cover the second water outlet channel.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses simple structure, and in backstop located first water outlet channel, water flowed to first water outlet channel in, it is little to compare in the water pressure of water inlet department, and backstop is difficult to be shifted by the water impact, because the setting of first sealing member for water can not follow and pass through between first water outlet channel and the casing, and has adopted the resilience force of preventing the backwater pad to make and prevent the backwater pad and seal the delivery port, can effectively prevent the sewage backward flow.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic view of the check device of the present invention when the water outlet is blocked;

FIG. 3 is a schematic view of the non-return device of the present invention when the water outlet is opened;

fig. 4 is a schematic structural view of the backstop device of the present invention.

In the figure, 1, a valve body; 101. a water inlet; 102. a first water outlet channel; 2. a backstop device; 201. a housing; 211. a second water outlet channel; 221. a fixed channel; 231. an annular limiting groove; 241. clamping the convex block; 202. a water return prevention member; 212. a waterproof cushion; 222. fixing a column; 3. a first seal.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the water inlet valve for preventing sewage from flowing back comprises a valve body 1, wherein the valve body 1 is provided with a water inlet 101 and a first water outlet channel 102, and two non-return devices 2 are arranged in the first water outlet channel 102, so that sewage can be effectively prevented from flowing back due to double protection. The non-return device 2 comprises a shell 201 and a backflow-preventing part 202, a first sealing part 3 is arranged between the shell 201 and the inner wall of the first water outlet channel 102, the first sealing part 3 is an O-shaped rubber ring, and the first sealing part 3 is used for preventing water from passing between the shell 201 and the inner wall of the first water outlet channel 102. The first seal 3 surrounds the housing 201. The housing 201 is provided with a second water outlet channel 211, the anti-backflow piece 202 is provided with an anti-backflow cushion 212 made of elastic material, and the anti-backflow cushion 212 arches towards one end far away from the second water outlet channel 211. The annular edge of the anti-backflow pad 212 is located outside the second water outlet channel 211, so that the anti-backflow pad 212 can completely cover the water outlet end of the second water outlet channel 211. When the water inlet 101 is not filled with water, the water return prevention pad 212 closes the water outlet end of the second water outlet channel 211, and when the water inlet 101 is filled with water, the water return prevention pad 212 is bent under the flushing of the water pressure, so that the second water outlet channel 211 is opened. When water flows into the valve body 1 from the water inlet 101, the water flow impacts the water return prevention cushion 212, the water return prevention cushion 212 is bent under the flushing of the water pressure, the second water outlet channel 211 is opened, the non-return device 2 is in an open state, and the valve body 1 discharges water. When the water inlet 101 stops feeding water, the anti-backwater cushion 212 is made of an elastic material, so that the anti-backwater cushion 212 is restored to an initial state under the action of the rebounding force, and the water outlet end of the second water outlet channel 211 is closed, so that the sewage cannot flow back. The utility model discloses simple structure, and backstop 2 locates in first water outlet channel 102, water flows in first water outlet channel 102, and it is little to compare in the water pressure of water inlet 101 department, and backstop 2 is difficult to be attacked the aversion by the water, because the setting of first sealing member 3 for water can not follow and pass through between first water outlet channel 102 and the casing 201, and has adopted the resilience force of preventing backwater pad 212 to make and prevent backwater pad 212 to seal the delivery port, can effectively prevent the sewage backward flow.

In more detail, the anti-backflow piece 202 is provided with a fixing column 222, the fixing column 222 is fixedly connected with the anti-backflow cushion 212, the shell 201 is provided with a fixing channel 221, and the fixing column 222 and the fixing channel 221 are in interference fit. Adopt interference fit to assemble back water prevention piece 202 and casing 201 together, the assembly method is simple, and the equipment is convenient.

In further detail, the outer wall of the housing 201 is provided with a clamping protrusion 241, and the clamping protrusion 241 is used for being clamped with the inner wall of the first water outlet channel 102. The shell 201 is clamped with the first water outlet channel 102 through the clamping convex block 241, the connection structure is simple, and the assembly mode of the non-return device 2 and the valve body 1 is simple.

In further detail, the outer wall of the housing 201 is provided with an annular limiting groove 231, and the annular limiting groove 231 for the first sealing element 3 to be embedded is used for limiting the position of the first sealing element 3, so as to prevent the first sealing element 3 from moving.

In fig. 3, the arrow direction represents the water flow direction.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The water inlet valve for preventing sewage backflow is characterized by comprising a valve body (1), wherein the valve body (1) is provided with a water inlet (101) and a first water outlet channel (102), at least one non-return device (2) is arranged in the first water outlet channel (102), the non-return device (2) comprises a shell (201) and a backflow-preventing piece (202), a first sealing piece (3) is arranged between the shell (201) and the inner wall of the first water outlet channel (102), the shell (201) is provided with a plurality of second water outlet channels (211), the backflow-preventing piece (202) is provided with a backflow-preventing pad (212) made of elastic materials, when the water inlet (101) is not filled with water, the backflow-preventing pad (212) closes the water outlet end of the second water outlet channel (211), and when the water inlet (101) is filled with water, the backflow-preventing pad (212) bends under the washing of water pressure, so that the second water outlet passage (211) is opened.

2. A valve according to claim 1, wherein the anti-drainback pad (212) is arched away from the second outlet passage (211).

3. The water inlet valve for preventing sewage from flowing back according to claim 1, wherein the backflow preventing member (202) is provided with a fixing column (222), the fixing column (222) is fixedly connected with the backflow preventing pad (212), the housing (201) is provided with a fixing channel (221), and the fixing column (222) and the fixing channel (221) are in interference fit.

4. A water inlet valve for preventing backflow of polluted water according to claim 1, wherein the number of the first water outlet passage (102) stopping and reversing means (2) is two.

5. The water inlet valve for preventing sewage from flowing back according to claim 1, wherein the outer wall of the housing (201) is provided with a clamping convex block (241) for clamping with the inner wall of the first water outlet channel (102).

6. The water inlet valve for preventing sewage from flowing back according to claim 1, wherein the outer wall of the housing (201) is provided with an annular limiting groove (231) for embedding the first sealing element (3).

7. A water inlet valve for preventing backflow of polluted water according to claim 1, wherein the first sealing member (3) is an O-ring rubber.

8. A water inlet valve for preventing backflow of polluted water according to claim 1, wherein an annular edge of the backflow preventing pad (212) is positioned at an outer side of the second water outlet passage (211).