Check valve

Abstract

The utility model provides a check valve, and belongs to the technical field of valves. The non-return faucet solves the problems that an existing faucet part has a non-return function, but a faucet with a single non-return function still can stop backflow in the long-time use process. The check valve comprises a valve body, the two ends of the valve body are connected with a water inlet piece used for water inflow and a water outlet piece used for water outflow, a water passing channel used for water passing is formed in the water outlet piece, and a fixing piece and a double-check structure are arranged at the position, opposite to the water passing channel, in the water outlet piece. The double non-return structure is composed of an installation part, a first non-return part, a second non-return part, an ejector rod and two reset springs, a fixing part is arranged in the fixing part, a plurality of water passing holes are formed in the fixing part, the ejector rod is arranged on the fixing part in a penetrating mode and slides up and down on the fixing part, and one end of the ejector rod abuts against the first non-return part. The non-return valve has the advantage of double non-return functions.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a check valve. Background Art

[0002] A check valve is a valve that automatically opens and closes its disc based on the flow of oil to prevent backflow. It is also known as a non-return valve, one-way valve, reverse flow valve, or back-pressure valve. A check valve is an automatic valve whose primary functions are to prevent backflow, reverse rotation of pumps and drive motors, and to release oil from containers.

[0003] Current faucets are partially equipped with a non-return function. However, a faucet with a single non-return function may still experience a cut-off backflow phenomenon during long-term use, thereby causing great inconvenience to the user and reducing the practicality of the existing faucet. Summary of the Invention

[0004] The purpose of the utility model is to provide a check valve with a double check function in order to solve the above problems in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A check valve includes a valve body, wherein both ends of the valve body are connected to a water inlet member for water inlet and a water outlet member for water outlet, one end of the water outlet member is connected to the valve body, and the other end is connected to the outside, and is characterized in that the water outlet member has a water passage for water passing therethrough, and a fixing member and a double check structure are provided in the water outlet member and relative to the water passage, and the double check structure consists of a mounting portion, a first check member, a second check member, a push rod and two return springs, a fixing portion is provided in the fixing member, and a plurality of water holes for water passing therethrough are opened on the fixing portion, one of the return springs is provided between the first check member and the mounting portion, and the other return spring is provided between the fixing portion and the second check member, the push rod is passed through the fixing portion and slides up and down on the fixing portion, and one end of the push rod is abutted against the first check member, the first check member is arranged in an inverted T-shaped structure, and the second check member is arranged in an I-shaped structure.

[0006] In the above-mentioned check valve, a first water stop plate is provided at the lower end of the first check member, and a second water stop plate is provided at the upper end of the second check member.

[0007] In the above-mentioned check valve, the first check member moves up and down in the water channel and controls the closing and opening of the water channel, and the second check member moves up and down on the fixed part and controls the closing and opening of the water hole in the fixed part.

[0008] In the above-mentioned check valve, the mounting portion is connected to the water outlet member via threads, and the water outlet member and the valve body are sealed via threads.

[0009] Compared with the prior art, the check valve performs double checking by means of a double checking structure provided on the water outlet, thereby improving the checking effect, bringing convenience to the user and improving the practicality of the faucet body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic cross-sectional structural diagram of the present utility model.

[0011] In the figure, 1. valve body; 2. water inlet part; 3. water outlet part; 4. water passage; 5. fixing part; 6. mounting part; 7. check member 1; 8. check member 2; 9. push rod; 10. return spring; 11. fixing part. DETAILED DESCRIPTION

[0012] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0013] like Figure 1 As shown, the check valve includes a valve body 1, and the two ends of the valve body 1 are connected to a water inlet 2 for water inlet and a water outlet 3 for water outlet. One end of the water outlet 3 is connected to the valve body 1, and the other end is connected to the outside. The water outlet 3 has a water passage 4 for water passing through. A fixing member 5 and a double check structure are provided in the water outlet 3 and relative to the water passage 4. The double check structure consists of a mounting portion 6, a check member 1 7, a check member 2 8, a push rod 9 and two reset springs 10. A fixing part 11 is provided in the fixing part 5, and a plurality of water holes for passing water are opened on the fixing part 11. One of the reset springs 10 is provided between the check piece 1 7 and the mounting part 6, and the other reset spring 10 is provided between the fixing part 11 and the check piece 2 8. The push rod 9 is passed through the fixing part 11 and slides up and down on the fixing part 11, and one end of the push rod 9 is against the check piece 1 7. The check piece 1 7 is provided in an inverted T-shaped structure, and the check piece 2 8 is provided in an I-shaped structure.

[0014] To explain in further detail, liquid or gas flows into the water outlet part 3 through the valve body 1 and passes through the water passage 4 inside the water outlet part 3. The check piece 2 8 moves upward under pressure, and the reset spring 10 is in a compressed state. The check plate on the check piece 2 8 moves upward and controls the push rod 9 to move upward, opening the water hole of the fixed part 11. The check piece 1 7 moves upward under pressure, and the reset spring 10 is in a compressed state. The check plate 2 moves upward, making the water passage 4 open. When the valve is closed, the two reset springs 10 rebound, and the check piece 1 7 and the check piece 2 8 move downward, thereby closing the water passage 4 and the water hole of the fixed part 11.

[0015] To be more specific, the lower end of the check member 7 is provided with a water stop plate 1, and the upper end of the check member 2 8 is provided with a water stop plate 2.

[0016] In further detail, the check member 7 moves up and down in the water channel 4 and controls the closing and opening of the water channel 4, and the check member 2 8 moves up and down on the fixing portion 11 and controls the closing and opening of the water hole in the fixing portion 11.

[0017] To be more specific, the mounting portion 6 is connected to the water outlet member 3 via threads, and the water outlet member 3 and the valve body 1 are sealed via threads.

[0018] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0019] Although this document frequently uses terms such as valve body 1, water inlet member 2, water outlet member 3, water passage 4, fixing member 5, mounting portion 6, first check member 7, second check member 8, ejector rod 9, return spring 10, and fixing portion 11, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A check valve, comprising a valve body (1), wherein both ends of the valve body (1) are connected to a water inlet (2) for water inlet and a water outlet (3) for water outlet, wherein one end of the water outlet (3) is connected to the valve body (1) and the other end is connected to the outside, and is characterized in that: The water outlet part (3) has a water passage (4) for passing water. A fixing part (5) and a double check structure are provided in the water outlet part (3) relative to the water passage (4). The double check structure is composed of a mounting part (6), a check part 1 (7), a check part 2 (8), a push rod (9) and two return springs (10). A fixing part (11) is provided in the fixing part (5). A plurality of water passages for passing water are provided on the fixing part (11). The invention relates to a method for manufacturing a plurality of return parts, wherein the plurality of return parts are provided with ...

2. A check valve according to claim 1, characterized in that: The lower end of the first return member (7) is provided with a water stop plate 1, and the upper end of the second return member (8) is provided with a water stop plate 2.

3. A check valve according to claim 1, characterized in that: The first check member (7) moves up and down in the water passage (4) and controls the closing and opening of the water passage (4); the second check member (8) moves up and down on the fixed portion (11) and controls the closing and opening of the water hole in the fixed portion (11).

4. A check valve according to claim 1, characterized in that: The mounting portion (6) is connected to the water outlet member (3) via threads, and the water outlet member (3) and the valve body (1) are sealed via threads.

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