Self-sealing device for preventing water backflow

Abstract

The self-sealing device comprises a hollow water receiving pipe, a first pipe opening is formed in the top end of the water receiving pipe, a second pipe opening is formed in the bottom end of the water receiving pipe, a water conveying channel is formed between the first pipe opening and the second pipe opening, a non-return plug is connected into the water receiving pipe in a plugging mode, the non-return plug is provided with an elastic film body, and the elastic film body is connected with the water receiving pipe in a plugging mode. The elastic membrane body is provided with a crack which can be communicated with the water conveying channel, and the elastic membrane body is divided into a plurality of elastic membrane pieces which can seal the upward overflow leakage of the fluid through the crack. According to the self-sealing device, the self-sealing effect can be achieved through the elastic membrane, water between the water suction pump and the water receiving pipe is prevented from overflowing out of the connector along with water pressure, the problem of water backflow is solved, and sanitation and attractiveness of a table board can be kept.

Description

Technical Field

[0001] The utility model relates to the field of electric connectors, in particular to a self-sealing device for preventing water backflow. Background Art

[0002] The existing electric kettle generally adopts the automatic water outlet mode, or the tea stove generally adopts the automatic water addition mode, and its main implementation structure is as follows Figure 1 The device comprises a connector lower seat 1, a water pump 2 and a water outlet 3. A water receiving pipe 4 connected to the heating container is provided in the connector lower seat. The water pump is connected to the water receiving pipe and the water outlet respectively by means of a water pipe 5. The water pump can work to pump cold water into the heating container, or to pump hot water out of the heating container and then discharge it through the water outlet. The height at which the water outlet is set is generally higher than the connector lower seat and the water pump, so that a certain water pressure will be formed in the water pipe. Therefore, when the water pump stops working, some water will remain in the water pipe between the water pump and the water receiving pipe, and between the water outlet and the water pump. The water will slowly overflow from the connector lower seat as the water pressure increases. The longer the time, the more water there will be. The water will gather and flow to the countertop, affecting hygiene and aesthetics. Therefore, the applicant has provided a new technical solution to solve the above-mentioned various defects by improving and perfecting the electrical connector and combining the above-mentioned existing technologies for consumers to choose and use. Summary of the Invention

[0003] The purpose of the utility model is to solve the above-mentioned existing problems and provide a self-sealing device with a simple and reasonable structure for preventing water backflow.

[0004] A self-sealing device for preventing water backflow comprises a hollow water receiving pipe, wherein the top end of the water receiving pipe is provided with a first pipe opening, the bottom end of the water receiving pipe is provided with a second pipe opening, a water supply channel is formed between the first pipe opening and the second pipe opening, a check plug is connected in the water receiving pipe, the check plug is provided with an elastic membrane, a slit is provided on the elastic membrane that can conduct the water supply channel, and the elastic membrane is divided by the slit to form a plurality of elastic diaphragms that can seal the fluid from overflowing upward.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, a fixing piece is provided on the lower side of the check plug, and the fixing piece is assembled and connected to the water receiving pipe through a quick-disassembly structure to press the check plug between the water receiving pipe and the fixing piece.

[0007] As a further solution, the cross section of the elastic membrane body is an arc-shaped structure that is concave toward the second pipe opening.

[0008] As a further solution, the check plug is made of an integral elastic material, including a side wall portion and a top wall portion. The side wall portion is tightly fitted with the water receiving pipe, and the top wall portion constitutes an elastic membrane body, and its thickness is smaller than the side wall portion. The elastic membrane body is provided with a cross-shaped or special-shaped slit.

[0009] As a further solution, the inner wall surface of the water receiving pipe is provided with a first step surface, and the side wall portion is provided with a first stop surface. When the check plug is installed in place, the first stop surface tightly abuts against the first step surface.

[0010] As a further solution, the outer surface of the side wall portion is located above the first stop surface to form an inclined introduction surface, and the inner wall surface of the water receiving pipe is correspondingly provided with an inclined stop surface that seals against the inclined introduction surface.

[0011] As a further solution, the quick-disassembly structure includes a number of inverted blocks and a number of buckle interfaces corresponding to the number of inverted blocks; the fixing piece is hollow cylindrical and is adapted to be nested in the water receiving pipe, the number of inverted blocks are evenly distributed on the outer surface of the fixing piece, and the number of buckle interfaces are opened on the water receiving pipe corresponding to the inverted blocks.

[0012] As a further solution, two open gaps are provided at the bottom of the water receiving pipe, the two open gaps are arranged on opposite sides and placed between two adjacent buckle interfaces, and at least part of the side wall of the fixing part is exposed through the open gaps.

[0013] As a further solution, a limiting convex ring is provided at the bottom of the fixing member, and a second step surface is provided on the limiting convex ring. When the fixing member is installed in place, the second step surface is supported on the bottom surface of the water receiving pipe.

[0014] As a further solution, a connector lower seat is further included. A central assembly channel is opened on the connector lower seat, and the water receiving pipe is connected to the central assembly channel.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model discloses a self-sealing device for preventing water backflow. This self-sealing device can achieve a self-sealing effect by using an elastic diaphragm, preventing water between a water pump and a water pipe from overflowing from the connector due to water pressure, thereby solving the problem of water backflow and maintaining the hygiene and beauty of the countertop. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the background technology structure of the present utility model.

[0018] Figure 2 This is a schematic cross-sectional view of an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the stop-return plug structure of the utility model.

[0020] Figure 4 This is a schematic diagram of the exploded cross-sectional structure of the self-sealing device in the present invention.

[0021] Figure 5 and Figure 6 This is a schematic diagram of the exploded structure of the self-sealing device in the present utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 6 As shown, a self-sealing device for preventing water backflow includes a hollow water receiving pipe 1, a first pipe opening 101 is provided at the top end of the water receiving pipe 1, a second pipe opening 102 is provided at the bottom end of the water receiving pipe 1, a water supply channel 103 is formed between the first pipe opening 101 and the second pipe opening 102, a check plug 2 is connected to the water receiving pipe 1, and the check plug 2 is provided with an elastic membrane 21, a slit 211 is formed on the elastic membrane 21 to conduct the water supply channel 103, and the elastic membrane 21 is divided by the slit 211 to form a plurality of elastic diaphragms 212 that can seal the upward overflow of the fluid.

[0024] This self-sealing device applied on the connector seat can achieve a self-sealing effect by using the elastic diaphragm 212, preventing the water between the water pump and the water pipe 1 from overflowing from the connector due to water pressure, solving the water backflow problem, and maintaining the hygiene and beauty of the countertop.

[0025] A fixing part 3 is provided on the lower side of the check plug 2, and the fixing part 3 is assembled and connected to the water receiving pipe 1 through a quick-disassembly structure to press the check plug 2 between the water receiving pipe 1 and the fixing part 3; since the check plug 2 is made of silicone material, it cannot be fixed with rigid structures such as buckles or screws. Therefore, after the fixing part 3 is fixedly connected to the water receiving pipe 1, the check plug 2 is blocked and fixed in the water receiving pipe 1.

[0026] The cross-section of the elastic membrane body 21 is an arc-shaped structure concave toward the second pipe opening 102; after the water pump stops working, water will exert pressure on the elastic membrane body 21. The elastic membrane body 21 of this shape can disperse the pressure to the four sides of the elastic membrane body 21 through the arc-shaped structure, thereby reducing the pressure on the elastic diaphragm 212 and preventing the elastic diaphragm 212 from being pushed open under static water pressure.

[0027] The check plug 2 is made of an elastic material in one piece, and includes a side wall portion 22 and a top wall portion. The side wall portion 22 is tightly fitted with the water receiving pipe 1, and the top wall portion constitutes an elastic membrane 21, which is thinner than the side wall portion 22. Reducing the thickness of the side wall portion 22 (i.e., the elastic membrane 21) can improve the flexibility and elasticity of the elastic membrane 212. In conventional cases, the elastic membrane 21 is usually provided with a cross-shaped slit 211.

[0028] The inner wall surface of the water receiving pipe 1 is provided with a first step surface 104, and the side wall portion 22 is provided with a first stop surface 221. When the check plug 2 is installed in place, the first stop surface 221 is tightly abutted against the first step surface 104. The cooperation between the first step surface 104 and the first stop surface 221 can limit the depth to which the check plug 2 is inserted, thereby playing a limiting role.

[0029] The outer surface of the side wall portion 22 is located above the first stop surface 221 to form an inclined introduction surface 222, and the inner wall surface of the water receiving pipe 1 is correspondingly provided with an inclined stop surface 105 that seals against the inclined introduction surface 222; the inclined introduction surface 222 and the inclined stop surface 105 can improve the assembly efficiency of the check plug 2 on the one hand, and on the other hand ensure that the inclined introduction surface 222 and the inclined stop surface 105 can be in close contact with each other to play a sealing role.

[0030] The quick-disassembly structure includes a plurality of inverted blocks 31 and a plurality of buckle interfaces 11 corresponding to the number of inverted blocks 31; the fixing member 3 is hollow cylindrical and is adapted to be nested in the water receiving pipe 1, the plurality of inverted blocks 31 are evenly distributed on the outer surface of the fixing member 3, and the plurality of buckle interfaces 11 are opened on the water receiving pipe 1 corresponding to the inverted blocks 31; the fixing member 3 is fixed by a quick connection method, is easy to assemble and disassemble, has a firm connection, and can improve production efficiency.

[0031] Two open notches 12 are provided at the bottom of the water receiving pipe 1. The two open notches 12 are arranged on opposite sides and are placed between two adjacent buckle interfaces 11. At least part of the side wall of the fixing part 3 is exposed through the open notches 12. The two open notches 12 help the operator to hold the fixing part 3 with his fingers when disassembling the fixing part 3, thereby increasing the contact area between the fingers and the fixing part 3, making it less likely to slip and convenient for disassembly.

[0032] The bottom of the fixing member 3 is provided with a limiting protrusion 32, and a second stepped surface 33 is formed on the limiting protrusion 32. When the fixing member 3 is installed in place, the second stepped surface 33 abuts against the bottom surface of the water receiving pipe 1. The cooperation between the second stepped surface 33 and the bottom surface of the water receiving pipe 1 can limit the insertion depth of the fixing member 3, thus providing a limiting function.

[0033] It also includes a connector lower seat 4, which has a central assembly channel 401, and the water receiving pipe 1 is connected to the central assembly channel 401; in addition, a pointed water receiving nozzle 13 extends from the top of the water receiving pipe 1, and a cut surface is provided on the opposite side of the water receiving nozzle 13, and an inlet / outlet 131 is formed on both sides of the water receiving nozzle 13 through the cut surface, and the extension height of the water receiving nozzle 13 is not higher than the central assembly channel 401.

[0034] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A self-sealing device for preventing water backflow, comprising a hollow water receiving pipe, a first pipe opening being provided at the top end of the water receiving pipe, a second pipe opening being provided at the bottom end of the water receiving pipe, a water delivery channel being formed between the first pipe opening and the second pipe opening, and characterized in that: A check plug is connected in the water receiving pipe, and the check plug is provided with an elastic membrane body. The elastic membrane body is provided with a slit that can conduct the water supply channel, and the elastic membrane body is divided into several pieces by the slit to form elastic membranes that can seal the fluid from overflowing upward.

2. A self-sealing device for preventing water backflow according to claim 1, characterized in that: A fixing piece is provided on the lower side of the check plug, and the fixing piece is assembled and connected with the water receiving pipe through a quick-disassembly structure so as to press the check plug tightly between the water receiving pipe and the fixing piece.

3. The self-sealing device for preventing water backflow according to claim 1, characterized in that: The cross section of the elastic membrane is an arc-shaped structure that is concave toward the second pipe opening.

4. The self-sealing device for preventing water backflow according to claim 1, characterized in that: The check plug is made of an elastic material in one piece, including a side wall and a top wall. The side wall is tightly fitted with the water pipe, and the top wall constitutes an elastic membrane with a thickness smaller than the side wall. A cross-shaped slit is opened on the elastic membrane.

5. The self-sealing device for preventing water backflow according to claim 4, characterized in that: The inner wall surface of the water receiving pipe is provided with a first step surface, and the side wall portion is provided with a first stop surface. When the check plug is installed in place, the first stop surface is tightly against the first step surface.

6. The self-sealing device for preventing water backflow according to claim 5, characterized in that: The outer side surface of the side wall portion is located above the first stop surface to form an inclined introduction surface, and the inner wall surface of the water receiving pipe is correspondingly provided with an inclined stop surface that is sealed against the inclined introduction surface.

7. The self-sealing device for preventing water backflow according to claim 2, characterized in that: The quick-disassembly structure includes a plurality of inverted blocks and a plurality of buckle interfaces corresponding to the number of inverted blocks; the fixing piece is hollow cylindrical and is adapted to be nested in the water receiving pipe, the plurality of inverted blocks are evenly distributed on the outer surface of the fixing piece, and the plurality of buckle interfaces are opened on the water receiving pipe corresponding to the inverted blocks.

8. The self-sealing device for preventing water backflow according to claim 7, characterized in that: The bottom of the water receiving pipe is provided with two open gaps, which are arranged on opposite sides and placed between two adjacent buckle interfaces. At least part of the side wall of the fixing piece is exposed through the open gaps.

9. The self-sealing device for preventing water backflow according to claim 2, characterized in that: A limiting convex ring is provided at the bottom of the fixing member, and a second step surface is provided on the limiting convex ring. When the fixing member is installed in place, the second step surface abuts against the bottom surface of the water receiving pipe.

10. The self-sealing device for preventing water backflow according to claim 1, characterized in that: It also includes a connector lower seat, which is provided with a central assembly channel, and the water receiving pipe is connected to the central assembly channel.

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