Structure for preventing liquid from flowing back

Abstract

The utility model relates to the field of laundry detergent discharge, and discloses a liquid backflow prevention structure which comprises a drainage component, a water inlet pipe and a conveying transverse pipe, the water inlet pipe is fixedly connected to one end of the conveying transverse pipe, and the drainage component is fixedly connected to the other end of the conveying transverse pipe; the drainage component comprises a drainage vertical pipe, a fixing plate and a protective shell, the protective shell is arranged on the outer surface of the drainage vertical pipe, the fixing plate is fixedly connected to the outer surface of the upper portion of the drainage vertical pipe, a threaded connector is formed in the outer surface of the bottom of the drainage vertical pipe, and a first liquid inlet connector is formed in the outer surface of the protective shell. The connector for discharging the laundry detergent is arranged on the outer surface of the drainage vertical pipe, the laundry detergent can be prevented from transversely flowing back, the backflow prevention assembly is arranged in the drainage vertical pipe, water carrying the laundry detergent can be further prevented from rising and flowing back, and therefore the laundry detergent is prevented from polluting drinking water.

Description

Technical Field

[0001] The utility model relates to the field of laundry liquid discharge, in particular to a structure for preventing liquid backflow. Background Art

[0002] A washing machine is a household appliance that is mainly used to clean clothes and fabrics. Its main function is to drive the washing tub (or impeller) to rotate through an electric motor, and with the help of water and detergent, the clothes will rub, collide and tumble against the tub wall or impeller, thereby removing stains and dirt from the clothes.

[0003] In order to meet people's usage needs, current washing machines have the function of automatically dispensing laundry detergent. However, the existing laundry detergent dispenser does not have a backflow prevention function when in use. Since the laundry detergent delivery interface is arranged on the outer surface of the middle part of the water delivery transverse pipe, when the laundry detergent is discharged into the water delivery transverse pipe, due to the water pressure difference inside the water delivery transverse pipe, part of the laundry detergent or sterilizing liquid may flow back into the water delivery transverse pipe, and finally the laundry detergent or sterilizing liquid may flow back into the drinking water pipe through the water delivery transverse pipe. Utility Model Content

[0004] The utility model aims to provide a liquid backflow prevention structure to solve the following technical problem: how to prevent laundry detergent from backflowing into the interior of a drinking water pipe.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a liquid backflow prevention structure, comprising: a drainage component, a water inlet pipe and a delivery transverse pipe, wherein the water inlet pipe is fixedly connected to one end of the delivery transverse pipe, and the drainage component is fixedly connected to the other end of the delivery transverse pipe;

[0006] The drainage component includes a drainage vertical pipe, a fixing plate and a protective shell, wherein the protective shell is arranged on the outer surface of the drainage vertical pipe, the fixing plate is fixedly connected to the upper outer surface of the drainage vertical pipe, a threaded interface is arranged on the bottom outer surface of the drainage vertical pipe, a first liquid inlet interface is arranged on the outer surface of the protective shell, a second liquid inlet interface is arranged on the outer surface of the protective shell and located at the upper edge of the first liquid inlet interface, a backflow prevention component is rotatably arranged inside the protective shell and located at one end of the second liquid inlet interface, limiting grooves are arranged on both sides of the protective shell, a limiting shaft hole is arranged at the inner center of the limiting groove, and a limiting card slot is arranged inside the protective shell;

[0007] The anti-backflow assembly includes a reset torsion spring, a lower sealing plate, a sealing strip, an upper sealing plate, and the lower sealing plate is fixedly connected to the bottom outer surface of , the upper sealing plate is fixedly connected to the upper outer surface of , the reset torsion spring is respectively fixedly connected to the outer surfaces of both ends of , and the sealing strip is fixedly arranged on the outer surfaces of the lower sealing plate and the upper sealing plate.

[0008] As a preferred solution of the present utility model: the first liquid inlet interface and the second liquid inlet interface are connected to the interior of the drainage vertical pipe.

[0009] As a preferred solution of the utility model: the upper sealing plate and the lower sealing plate are rotatably engaged with the interior of the protective shell through limiting slots.

[0010] As a preferred solution of the utility model: the two ends are rotatably connected with the inside of the limiting groove through the limiting shaft hole.

[0011] As a preferred solution of the utility model: one end of the return torsion spring is fixedly connected to an inner end surface of the limiting shaft hole.

[0012] As a preferred solution of the utility model: the lower sealing plate is aligned with one end of the second liquid inlet interface inside the protective shell.

[0013] As a preferred solution of the present utility model: the first liquid inlet interface and the second liquid inlet interface can also be arranged on the outer surface of the protective shell in an upward tilt.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model improves the vertical discharge of laundry detergent into the washing machine, which can ensure the normal downward flow of laundry detergent under the action of gravity, thereby preventing the laundry detergent from flowing back and polluting drinking water. At the same time, the anti-backflow component plays a one-way dredging role inside the vertical drainage pipe, thereby strengthening the insurance against backflow;

[0016] (2) The utility model can prevent the lateral backflow of the laundry liquid by arranging the interface for discharging the laundry liquid on the outer surface of the vertical drainage pipe, and further prevents the water carrying the laundry liquid from rising and flowing back by arranging an anti-backflow component inside the vertical drainage pipe, thereby avoiding the laundry liquid from contaminating the drinking water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 Schematic diagram of the structure to prevent liquid backflow;

[0019] Figure 2 It is a schematic diagram of the drainage component structure;

[0020] Figure 3 It is a schematic diagram of the cut-away side structure of the drainage component;

[0021] Figure 4 This is a schematic diagram of the structure of the other side of the drainage component;

[0022] Figure 5 This is a schematic diagram of the backflow prevention component structure.

[0023] Description of the drawings: 1. Drainage component; 2. Water inlet pipe; 3. Delivery cross pipe; 11. Threaded interface; 12. First liquid inlet interface; 13. Second liquid inlet interface; 14. Drainage vertical pipe; 15. Fixed plate; 16. Anti-backflow assembly; 17. Protective shell; 18. Limiting slot; 19. Limiting shaft hole; 110. Limiting groove; 161. Reset torsion spring; 162. Lower sealing plate; 163. Sealing strip; 164. Upper sealing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 5 As shown, the utility model is a structure for preventing liquid backflow, comprising: a drainage component 1, a water inlet pipe 2 and a delivery transverse pipe 3, wherein the water inlet pipe 2 is fixedly connected to one end of the delivery transverse pipe 3, and the drainage component 1 is fixedly connected to the other end of the delivery transverse pipe 3;

[0026] The drainage component 1 includes a drainage vertical pipe 14, a fixing plate 15 and a protective shell 17. The protective shell 17 is arranged on the outer surface of the drainage vertical pipe 14. The fixing plate 15 is fixedly connected to the upper outer surface of the drainage vertical pipe 14. The bottom outer surface of the drainage vertical pipe 14 is provided with a threaded interface 11. The outer surface of the protective shell 17 is provided with a first liquid inlet interface 12. The outer surface of the protective shell 17 and the upper edge of the first liquid inlet interface 12 are provided with a second liquid inlet interface 13. The interior of the protective shell 17 and one end of the second liquid inlet interface 13 are rotatably provided with an anti-backflow component 16. The two side surfaces of the protective shell 17 are provided with a limiting groove 110. The inner center of the limiting groove 110 is provided with a limiting shaft hole 19. The interior of the protective shell 17 is provided with a limiting card slot 18.

[0027] The anti-backflow assembly 16 includes a reset torsion spring 161, a lower sealing plate 162, a sealing strip 163, upper sealing plates 164 and 165. The lower sealing plate 162 is fixedly connected to the bottom outer surface of 165, the upper sealing plate 164 is fixedly connected to the upper outer surface of 165, the reset torsion spring 161 is respectively fixedly connected to the outer surfaces of both ends of 165, and the sealing strip 163 is fixedly arranged on the outer peripheral surfaces of the lower sealing plate 162 and the upper sealing plate 164.

[0028] The utility model is improved to discharge the laundry liquid vertically into the washing machine, which can ensure the normal downward flow of the laundry liquid under the action of gravity, thereby preventing the laundry liquid from flowing back and polluting the drinking water. At the same time, the anti-backflow component 16 plays a one-way dredging role in the drainage vertical pipe 14, thereby strengthening the insurance against backflow.

[0029] The first liquid inlet interface 12 and the second liquid inlet interface 13 of the utility model are connected to the inside of the drainage vertical pipe 14 to ensure that the laundry detergent enters the drainage vertical pipe 14. The upper sealing plate 164 and the lower sealing plate 162 are rotatably engaged with the inside of the protective shell 17 through the limiting card slot 18, and can be turned over inside the protective shell 17, so as to isolate the water after being discharged downward to avoid backflow. The two ends of 165 are rotatably engaged with the inside of the limiting groove 110 through the limiting shaft hole 19, which can limit the rotation of the anti-backflow component 16.

[0030] One end of the reset torsion spring 161 of the utility model is fixedly connected to an inner end surface of the limiting shaft hole 19, and can drive the reset torsion spring 161 to twist when 165 rotates, so that the reset torsion spring 161 provides power for the reset rotation of 165, and the lower sealing plate 162 is aligned with one end of the second liquid inlet interface 13 inside the protective shell 17, so as to isolate the laundry detergent from flowing back into the upper tank, and the first liquid inlet interface 12 and the second liquid inlet interface 13 can also be arranged on the outer surface of the protective shell 17 at an upward angle, which can further ensure that the laundry detergent flows downward under the action of gravity, and the surface laundry detergent refluxes and stays inside the first liquid inlet interface 12 and the second liquid inlet interface 13.

[0031] The working principle of the utility model: in view of the existing defect of backflow of laundry detergent, the present application sets the interface for discharging laundry detergent on the outer surface of the drainage vertical pipe 14 at one end of the delivery horizontal pipe 3 to prevent the laundry detergent from entering the interior of the delivery horizontal pipe 3 and causing backflow. Then, during the use of the washing machine, the existing laundry detergent pump can be controlled to transport the laundry detergent to the first liquid inlet interface 12 and the second liquid inlet interface 13, and then the laundry detergent is discharged downward into the washing machine through the drainage vertical pipe 14. Then, water is controlled to be transported to the interior of the delivery horizontal pipe 3 through the water inlet pipe 2, and then discharged into the drainage vertical pipe 14 through the delivery horizontal pipe 3. At the same time, the water pressure will squeeze the lower sealing plate 162 to deflect downward, and the water flow will be discharged downward into the interior of the washing machine. The laundry detergent discharged downward from the first liquid inlet interface 12 and the second liquid inlet interface 13 enters the interior of the washing machine. After the water pressure decreases, 165 will reset and rotate under the elastic force of the reset torsion spring 161, and at the same time, 165 will drive the lower sealing plate 162 and the upper sealing plate 164 to reset and flip inside the limit card slot 18 to seal the inside of the drainage vertical pipe 14, further preventing the water discharged downward from flowing back, thereby solving the problem of laundry detergent backflow. Therefore, by setting the interface for discharging laundry detergent on the outer surface of the drainage vertical pipe 14, the laundry detergent can be prevented from flowing back horizontally, and the anti-backflow component 16 is set inside the drainage vertical pipe 14, which can further prevent the water carrying the laundry detergent from rising and flowing back, thereby avoiding the laundry detergent from contaminating the drinking water.

[0032] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A structure for preventing liquid backflow, comprising: A drainage component (1), a water inlet pipe (2) and a delivery transverse pipe (3), wherein the water inlet pipe (2) is fixedly connected to one end of the delivery transverse pipe (3), and the drainage component (1) is fixedly connected to the other end of the delivery transverse pipe (3); The drainage component (1) comprises a drainage vertical pipe (14), a fixing plate (15) and a protective shell (17); the protective shell (17) is arranged on the outer surface of the drainage vertical pipe (14); the fixing plate (15) is fixedly connected to the upper outer surface of the drainage vertical pipe (14); the bottom outer surface of the drainage vertical pipe (14) is provided with a threaded interface (11); and the outer surface of the protective shell (17) is provided with a first liquid inlet interface (12); A second liquid inlet interface (13) is arranged on the outer surface of the protective shell (17) and located at the upper edge of the first liquid inlet interface (12); a backflow prevention component (16) is rotatably arranged inside the protective shell (17) and located at one end of the second liquid inlet interface (13); limiting grooves (110) are arranged on both sides of the protective shell (17); a limiting axial hole (19) is arranged at the inner center of the limiting groove (110); and a limiting card slot (18) is arranged inside the protective shell (17); The anti-backflow assembly (16) comprises a reset torsion spring (161), a lower sealing plate (162), a sealing strip (163), an upper sealing plate (164) and (165), wherein the lower sealing plate (162) is fixedly connected to the bottom outer surface of (165), the upper sealing plate (164) is fixedly connected to the upper outer surface of (165), the reset torsion spring (161) is respectively fixedly connected to the outer surfaces of both ends of (165), and the sealing strip (163) is fixedly arranged on the outer peripheral surfaces of the lower sealing plate (162) and the upper sealing plate (164).

2. A liquid backflow prevention structure according to claim 1, characterized in that: The first liquid inlet interface (12) and the second liquid inlet interface (13) are connected to the interior of the drainage vertical pipe (14).

3. A liquid backflow prevention structure according to claim 2, characterized in that: The upper sealing plate (164) and the lower sealing plate (162) are rotatably engaged with the interior of the protective housing (17) via the limiting clamping groove (18).

4. The liquid backflow prevention structure according to claim 3, characterized in that: The two ends of the (165) are rotatably engaged with the interior of the limiting groove (110) through the limiting shaft hole (19).

5. The liquid backflow prevention structure according to claim 4, characterized in that: One end of the return torsion spring (161) is fixedly connected to an inner end surface of the limiting shaft hole (19).

6. The liquid backflow prevention structure according to claim 5, characterized in that: The lower sealing plate (162) is aligned with one end of the second liquid inlet interface (13) inside the protective housing (17).

7. The liquid backflow prevention structure according to claim 6, characterized in that: The first liquid inlet interface (12) and the second liquid inlet interface (13) may also be arranged on the outer surface of the protective shell (17) in an upwardly inclined manner.

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