Quick plug connector with one-way valve

Abstract

The utility model discloses a quick connector with a one-way valve, which comprises a secondary pipe and a primary pipe, one end of the secondary pipe is fixedly and hermetically connected with one end of the primary pipe, a one-way valve structure is arranged at the joint of the secondary pipe and the primary pipe, the one-way valve structure comprises a spring and a movable valve core, and a fluid chamber and a front movable chamber are sequentially arranged in the secondary pipe. A rear movable chamber, a connecting chamber and a mounting chamber are sequentially arranged in the main pipe, the front movable chamber and the rear movable chamber are connected to form a movable chamber for the movable valve element to move, the connecting chamber is communicated with the rear movable chamber through a connecting port, and the diameter of the connecting port is smaller than that of the movable valve element. According to the one-way valve, the spring is matched with the movable valve element, the limiting pipe, the limiting rod and other components are combined, stable movement of the movable valve element is guaranteed, blocking is avoided, and long-term reliable work of the one-way valve is guaranteed. The quick-plug connector is compact and reasonable in overall structure and suitable for various working conditions, and the comprehensive performance and reliability of the quick-plug connector with the one-way valve are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of quick connector, specifically relates to quick connector with check valve. BACKGROUND

[0002] The quick connector is widely used in various mechanical equipment, industrial pipeline, automobile parts and other systems due to its quick connection and convenient disassembly. In actual use, in order to prevent the reverse flow of fluid, the quick connector with check valve emerges as the times require, which can ensure the smooth flow of fluid in a specific direction and avoid equipment failure, medium pollution or system pressure imbalance caused by fluid backflow.

[0003] However, the existing quick connector with check valve has many deficiencies in structure design and performance. In the check valve structure of part of the connector, the movable part is prone to jamming in the frequent opening and closing process, which causes the check valve to fail and cannot effectively prevent the reverse flow of fluid. Moreover, the sealing performance of the movable part is poor, and leakage may occur after long-term use, affecting the normal operation of the system. In addition, the installation and disassembly process of some quick connectors is relatively complex, which not only increases the operation difficulty, but also reduces the work efficiency. The sealing structure design is unreasonable, and the sealing effect is difficult to guarantee in harsh environments such as high pressure or high temperature, which has safety hazards. At the same time, the internal structure of the existing quick connector has large resistance when the fluid passes through, which affects the transmission efficiency of the fluid, and the stability of the structure is insufficient, which is difficult to adapt to the use requirements of different working conditions. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model adopts the technical scheme of quick connector with check valve, which comprises a sub-pipe and a mother pipe. One end of the sub-pipe is fixedly and sealingly connected to one end of the mother pipe. A check valve structure is arranged at the connection between the sub-pipe and the mother pipe. The check valve structure comprises a spring and a movable valve core. A fluid chamber and a front movable chamber are arranged in the sub-pipe in sequence. A rear movable chamber, a connecting chamber and an installation chamber are arranged in the mother pipe in sequence. The front movable chamber and the rear movable chamber are connected to form a movable chamber for the movement of the movable valve core. The connecting chamber is connected to the rear movable chamber through a connecting port. The diameter of the connecting port is smaller than the diameter of the movable valve core. One side of the movable valve core is fixedly connected to a limiting pipe. A plurality of side openings are arranged around the limiting pipe. One end of the spring extends into the limiting pipe. One end of the spring is sleeved on a plurality of limiting rods. The limiting rods are fixedly connected to the sub-pipe. The limiting rods are evenly and spacedly arranged. Adjacent limiting rods are fixedly connected.

[0005] As a preferred technical scheme of the above, one side of the movable valve core is provided with a sealing gasket. A center rod is arranged in the middle of the movable valve core. A limiting ring is arranged on the center rod. A center hole is arranged in the middle of the sealing gasket for the center rod to pass through. The sealing gasket is clamped between the limiting ring and the movable valve core.

[0006] As the preferred technical scheme of the above, the inner wall of the front movable chamber is provided with a plurality of limiting blocks, and one end of the spring is clamped between the limiting blocks and the limiting rod.

[0007] As the preferred technical scheme of the above, the connecting chamber is divided into a horizontal section and a vertical section, the horizontal section is communicated with the rear movable chamber, and the vertical section is communicated with the mounting chamber.

[0008] As the preferred technical scheme of the above, the mounting chamber is provided with a sealing ring and a limiting snap ring for limiting the sealing ring, the limiting snap ring is buckled with the female pipe, the female pipe is provided with a U-shaped clamp spring, both sides of the female pipe are provided with bayonets communicated with the mounting chamber, the U-shaped clamp spring comprises two clamp arms, and the clamp arms respectively extend into the mounting chamber through the bayonets.

[0009] The beneficial effects of the utility model are as follows: in the utility model, the spring cooperates with the movable valve core, combines with the limiting pipe, the limiting rod and other components, ensures stable movement of the movable valve core, avoids jamming, guarantees long-term reliable work of the check valve, the sealing gasket and the limiting ring are arranged, the sealing performance is greatly enhanced, fluid leakage is effectively prevented, the U-shaped clamp spring on the female pipe, the sealing ring and the like make the quick plug connector convenient to install and disassemble, and the sealing effect is good and the stability is high, the sectional design of the connecting chamber optimizes the fluid transmission path, reduces fluid resistance and improves transmission efficiency, the overall structure of the quick plug connector is compact and reasonable, is suitable for various working conditions, and the comprehensive performance and reliability of the quick plug connector with the check valve are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a sectional structure schematic view of the utility model;

[0011] Fig. 2 is a structure schematic view of the utility model. DETAILED DESCRIPTION

[0012] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] like Figs. 1-2 As shown, the quick-connect fitting with a one-way valve includes a daughter pipe 1 and a mother pipe 2. One end of the daughter pipe 1 is fixedly and sealed to one end of the mother pipe 2. A one-way valve structure is provided at the connection between the daughter pipe 1 and the mother pipe 2. The one-way valve structure includes a spring 3 and a movable valve core 4. The daughter pipe 1 has a fluid chamber 5 and a front movable chamber 6 arranged in sequence. The mother pipe 2 has a rear movable chamber 7, a connecting chamber 8, and an installation chamber 9 arranged in sequence. The front movable chamber 6 and the rear movable chamber 7 are connected to form a movable chamber for the movable valve core 4 to move. The connecting chamber 8 is connected to the rear movable chamber 7 through a connecting port 10. The diameter of the connecting port 10 is smaller than the diameter of the movable valve core 4. The mother pipe 2 and the daughter pipe 1 are connected to pipes respectively. Fluid flows from the end of the mother pipe 2 to the end of the daughter pipe 1. The movable valve core 4 is forced to overcome the elastic force of the spring 3 and moves towards the front movable chamber 6. The fluid flows out of the quick-connect fitting through the connecting port 10, the front movable chamber 6, and the fluid chamber 5. When the fluid pressure at the head pipe 2 drops to a certain level, the movable valve core 4, under the restoring force of the spring 3, blocks the connection port 10, preventing fluid from the daughter pipe 1 from flowing through the connection port 10 to the head pipe 2. A limiting tube 11 is fixedly connected to one side of the movable valve core 4. The limiting tube 11 has several side openings 25 around its perimeter. One end of the spring 3 extends into the limiting tube 11, and the other end of the spring 3 is fitted onto several limiting rods 26. The limiting rods 26 are fixedly connected to the daughter pipe 1, and are evenly spaced, with adjacent limiting rods 26 fixedly connected. The limiting tube 11 limits one end of the spring 3, ensuring that the spring 3 always remains in a state of pressing against the movable valve core 4.

[0016] Further, one side of the movable valve core 4 is provided with a sealing gasket 12, the middle part of the movable valve core 4 is provided with a center rod 13, the center rod 13 is provided with a limiting ring 14, the middle part of the sealing gasket 12 is provided with a center hole 15 for the center rod 13 to pass through, and the sealing gasket 12 is clamped between the limiting ring 14 and the movable valve core 4. The sealing gasket 12 improves the sealing property of the movable valve core 4.

[0017] Further, the inner wall of the front movable chamber 6 is provided with a plurality of limiting blocks 16, and one end of the spring 3 is clamped between the limiting block 16 and the limiting rod 26. The limiting block 16 and the limiting rod 26 fix one end of the spring 3, so that the spring 3 is prevented from being dislocated.

[0018] Further, the connecting chamber 8 is divided into a horizontal section 17 and a vertical section 18, the horizontal section 17 is communicated with the rear movable chamber 7, and the vertical section 18 is communicated with the mounting chamber 9. The horizontal section 17 and the vertical section 18 form a 90° angle, so that the impact of fluid on the movable valve core 4 is reduced.

[0019] Further, the mounting chamber 9 is provided with a sealing ring 19 and a limiting snap ring 27 for limiting the sealing ring 19, the limiting snap ring 27 is buckled with the female pipe 2, the female pipe 2 is provided with a U-shaped clasp spring 20, the two sides of the female pipe 2 are provided with clamping ports 21 communicated with the mounting chamber 9, the U-shaped clasp spring 20 comprises two clamping arms 22, and the clamping arms 22 respectively extend into the mounting chamber 9 through the clamping ports 21. The limiting snap ring 27 limits the position of the sealing ring 19, so that the sealing effect is prevented from being affected by dislocation. The female pipe 2 is quickly inserted with other pipelines through the U-shaped clasp spring 20.

[0020] It is worth mentioning that the U-shaped clasp spring 20, the spring 3 and other technical features involved in the utility model patent application should be regarded as prior art, the specific structure, working principle and possible control mode and spatial arrangement mode of these technical features can be selected by using conventional methods in the field, and should not be regarded as the invention point of the utility model patent, and the utility model patent will not be further expanded and described in detail.

[0021] The preferred embodiments of the utility model are described in detail above, and it should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative labor, therefore, all technical solutions obtained by logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A quick-connect fitting with a one-way valve, characterized in that, It includes a sub-pipe and a main pipe. One end of the sub-pipe is fixedly and sealed to one end of the main pipe. A one-way valve structure is provided at the connection between the sub-pipe and the main pipe. The one-way valve structure includes a spring and a movable valve core. The sub-pipe has a fluid chamber and a front movable chamber arranged in sequence. The main pipe has a rear movable chamber, a connecting chamber and an installation chamber arranged in sequence. The front movable chamber and the rear movable chamber are connected to form a movable chamber for the movable valve core to move. The connecting chamber is connected to the rear movable chamber through a connecting port. The diameter of the connecting port is smaller than the diameter of the movable valve core. A limit tube is fixedly connected to one side of the movable valve core. The limit tube has several side openings around its perimeter. One end of the spring extends into the limit tube and is sleeved on several limit rods. The limit rods are fixedly connected to the sub-pipe. The limit rods are evenly spaced and adjacent limit rods are fixedly connected.

2. The quick-connect fitting with a one-way valve as described in claim 1, characterized in that, A sealing gasket is provided on one side of the movable valve core, a central rod is provided in the middle of the movable valve core, a limiting ring is provided on the central rod, and a central hole is provided in the middle of the sealing gasket for the central rod to pass through. The sealing gasket is sandwiched between the limiting ring and the movable valve core.

3. The quick-connect fitting with a one-way valve as described in claim 1, characterized in that, The inner wall of the front active chamber is provided with several limiting blocks, and one end of the spring is clamped between the limiting block and the limiting rod.

4. The quick-connect fitting with a one-way valve as described in claim 1, characterized in that, The connecting chamber is divided into a horizontal section and a vertical section. The horizontal section connects to the rear activity chamber, and the vertical section connects to the installation chamber.

5. The quick-connect fitting with a one-way valve as described in claim 4, characterized in that, The installation chamber is equipped with a sealing ring and a limiting ring for limiting the sealing ring. The limiting ring is fastened to the main pipe. The main pipe is equipped with a U-shaped retaining spring. Both sides of the main pipe are provided with slots that connect to the installation chamber. The U-shaped retaining spring includes two retaining arms, which extend into the installation chamber through the slots.

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