CN211270112U

CN211270112U - Suck-back prevention device for inner container of water boiling machine

Info

Publication number: CN211270112U
Application number: CN201921393481.1U
Authority: CN
Inventors: 彭其兵
Original assignee: Shanghai Boyuan Automation Control System Co ltd
Current assignee: Shanghai Boyuan Automation Control System Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-08-18
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a suck-back prevention device of boiling water machine inner bag, including the boiling water machine inner bag shell, boiling water machine inner bag shell inner chamber is cavity form, and the below of boiling water machine inner bag shell is equipped with a water collector, and the top of boiling water machine inner bag shell is provided with the pneumatic check valve of minute-pressure, vertically is provided with an inner bag exhaust pipe in the water machine inner bag shell, and inner bag exhaust pipe downwardly extending penetrates water machine inner bag shell bottom always, downwardly extending to water collector inner chamber again, and the lower extreme of inner bag exhaust pipe forms the section of bending to one side deflection, and the drain has been seted up to the bottom of water collector. When the steam exhaust pipe export sinks into water collector sewage in, if the inner bag is inside to have the negative pressure, sewage water column can be sucked a height h backward, and if the water column pressure when this moment is greater than the starting pressure of the minute-pressure check valve at inner bag top, the check valve switches on, and the air gets into the inner bag, and inside negative pressure is eliminated, and the water column falls back. Therefore, the sewage can be effectively prevented from being sucked backwards.

Description

Suck-back prevention device for inner container of water boiling machine

Technical Field

The utility model belongs to the technical field of the technique of boiler and specifically relates to a suck-back prevention device of water boiler inner bag, in particular to system architecture.

Background

The inner container of a common normal-pressure heating water boiler is of a closed structure and is connected with the outside through an exhaust pipe, and steam condensate water often leaks out of the exhaust pipe, so that the steam condensate water is generally led into a water receiving tray of the water boiler. However, when the water pan discharges water unsmoothly, the pipe orifice of the steam exhaust pipe can be immersed by sewage, at the moment, if the inner container stops heating, along with the occurrence of the cooling process, air in the inner container can be contracted to form negative pressure, the sewage of the water pan is sucked back into the inner container through the steam exhaust pipe of the inner container, and the safety and the sanitation of drinking water are threatened.

Disclosure of Invention

An object of the utility model is to provide a boiling water machine inner bag prevent suck-back device sets up a minute-pressure check valve at boiling water machine inner bag top, and the outside air of inner bag can inwards switch on, and the inside air of inner bag then can not outwards switch on. When the inner container is close to the water receiving tray, the one-way valve can effectively prevent the back suction phenomenon as long as the starting pressure is small enough, so that the safety and sanitation of drinking water are ensured, and the defects in the prior art are overcome.

In order to realize the purpose, the technical scheme of the utility model is that: the utility model discloses a boiling water machine inner bag prevent suck-back device, including the boiling water machine inner bag shell, boiling water machine inner bag shell inner chamber is cavity form, the below of water machine inner bag shell is equipped with a water collector, the top of boiling water machine inner bag shell is provided with the pneumatic check valve of minute-pressure, vertically be provided with an inner bag exhaust pipe in the water machine inner bag shell, inner bag exhaust pipe downwardly extending penetrates water machine inner bag shell bottom always, downwardly extending to water collector inner chamber again, the lower extreme of inner bag exhaust pipe forms the section of bending to one side deflection, the tip of the section of bending forms the steam extraction pipe export, the drain has been seted up to the bottom of water collector.

The utility model discloses a boiling water machine inner bag prevent suck-back device, when the steam extraction export sinks in the water collector sewage, if the inner bag is inside to have the negative pressure, sewage water column 8 can be sucked a height h by the suck-back, when the water column pressure this moment is greater than the start pressure of the minute-pressure check valve at inner bag top, the check valve switches on, and the air admission inner bag, inside negative pressure is eliminated, and the water column falls back. Therefore, the sewage can be effectively prevented from being sucked backwards.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

The utility model discloses a back suction prevention device of water dispensers inner bag, it is different from prior art and lies in: including water boiler

inner bag shell

1, 1 inner chamber of water boiler inner bag shell is cavity form, the below of water boiler inner bag shell 1 is equipped with a water collector 2, the top of water boiler inner bag shell 1 is provided with minute-pressure pneumatic check valve 3, vertically be provided with an inner bag steam exhaust pipe 4 in the water boiler inner bag shell 1, inner bag steam exhaust pipe 4 extends downwards always and penetrates water boiler inner bag shell 1 bottom, downwardly extending to 2 inner chambers of water collector again, the lower extreme of inner bag steam exhaust pipe 4 forms section 5 of bending to one side deflection, the tip of section 5 of bending forms steam exhaust pipe export 7, drain 6 has been seted up to the bottom of water collector 2, the angle of bending of section 5 can be equal to or be greater than 90 degrees.

The working principle is as follows: the top of the inner container of the water boiler is provided with a micro-pressure pneumatic one-way valve 3, the air outside the inner container can be conducted inwards, and the air inside the inner container can not be conducted outwards. When the outlet of the steam exhaust pipe is immersed into the sewage of the water receiving tray, if negative pressure exists in the inner container, the sewage water column can be sucked to a height h, the vertical distance between the bottom of the water receiving tray and the bottom of the inner container shell of the water machine is greater than the height h of the sewage water column, and if the pressure of the water column at the moment is greater than the starting pressure of the micro-pressure one-way valve at the top of the inner container, the one-way valve is communicated, air enters the inner container, the internal negative pressure is eliminated, and the water column falls back. Therefore, the sewage can be effectively prevented from being sucked backwards. Even when the inner container is close to the water receiving tray, the one-way valve can effectively prevent the back suction phenomenon as long as the starting pressure is small enough, and the safety and the sanitation of drinking water are ensured. In principle, the water column height h is converted into a water column pressure value (in Pa), which is the actuation pressure (in Pa) of the top check valve.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The anti-suck-back device of the inner container of the water boiling machine is characterized in that: the water boiler inner container shell structure comprises a water boiler inner container shell (1), wherein an inner cavity of the water boiler inner container shell (1) is hollow, a water receiving tray (2) is arranged below the water boiler inner container shell (1), a micro-pressure pneumatic one-way valve (3) is arranged at the top of the water boiler inner container shell (1), an inner container steam exhaust pipe (4) is longitudinally arranged in the water boiler inner container shell (1), the inner container steam exhaust pipe (4) extends downwards all the time to penetrate through the bottom of the water boiler inner container shell (1) and then extends downwards to the inner cavity of the water receiving tray (2), a bending section (5) is formed by deflecting the lower end of the inner container steam exhaust pipe (4) to one side, a steam exhaust pipe outlet (7) is formed at the end part of the bending section (5), and a drain outlet (6).