CN206600551U - A kind of snap joint with pooling feature - Google Patents

Abstract

The utility model relates to a quick connector with a buffer function, which comprises a male plug and a female plug that are plugged together; the movable first valve core and the second valve core are respectively used in the male plug and the female plug to form ring seals with the sleeve respectively. The sealing fit of the part is simple in structure; the setting of the spring sleeve cuts off the pressure transmission between the cylindrical cavity and the buffer cavity during the process of pulling out the male plug, and forms a buffer for the second annular sealing part, effectively reducing the pressure The pressure that the second annular sealing part needs to bear during the pulling out process is reduced; O-ring sealing rings are respectively arranged in the two annular grooves in the second annular sealing part to avoid mutual extrusion of the double sealing rings in the same groove, resulting in The sealing ring is damaged and the second spool is stuck.

Description

A quick connector with buffer function

technical field

The utility model relates to the technical field of pipeline auxiliary equipment, in particular to a quick connector with a buffer function.

Background technique

Quick connectors include hydraulic quick connectors and various fluid quick connectors. It is a connection device that quickly connects or disconnects pipelines and realizes quick disassembly. The quick connector consists of two parts, a male plug and a female plug. The male plug and the female plug are each equivalent to a one-way valve with a spool inside. When not inserted, the one-way valve is closed under the action of the spring force. The female plugs are independently sealed; after the male plug is inserted into the female plug, the spring is compressed, and the spools of the male plug and the female plug are pushed open at the same time, the two pipelines are connected, and the fluid can flow.

Because the quick connector has a two-way check function and the pipeline is disconnected without leakage, it is widely used in the fields of petroleum, metallurgy, hydropower, construction machinery, ships, and electromechanical equipment. The design of the fluid channel is very important. Most of them use simple plugging to form a flow. The design of the flow channel is simple, but the sealing performance is not ideal, especially in the process of plugging and then pulling out, because it needs to operate under pressure, so Very prone to leaks.

Utility model content

The technical problem to be solved by the utility model is to provide a quick connector with a simple structure, not easy to leak, and a buffer function.

In order to solve the above-mentioned technical problems, the utility model provides a quick connector with a buffer function, including: a male plug and a female plug for mating;

The male plug includes a first sleeve of the male plug and a second sleeve of the male plug. The tail end of the second sleeve of the male plug is sealed and socketed in the front end of the first sleeve of the male plug. The second sleeve is also provided with a first valve core that can slide along its axial direction. The front end of the first valve core is provided with a first sealing disc. The ring-shaped inner wall of the second sleeve is tightly fitted;

The female plug includes a first sleeve of the female plug and a second sleeve of the female plug. The front end of the second sleeve of the female plug is sealed and sleeved in the tail end of the first sleeve of the female plug. A second sealing disc is fixed inside the second sleeve, and a cylindrical second valve core that can slide in the axial direction is arranged between the annular side wall of the second sealing disc and the annular inner wall of the second sleeve of the female plug. , the inner wall of the second spool is in sealing fit with the annular side wall of the second sealing disc, and the inner wall of the tail end of the second sleeve of the female plug is protrudingly provided with a second annular sealing portion, and the second annular sealing portion A second annular groove and a third annular groove are arranged parallel to the inner wall of the inner wall, and a second O-ring and a third O-ring are respectively arranged in the second and third annular grooves for The outer wall of the second valve core placed in the second annular sealing portion forms a sealing fit;

The diameter of the second sealing disk is the same as that of the first sealing disk, the outer diameter of the tail end of the cylindrical second valve core is the same as the outer diameter of the front end of the second sleeve of the male plug, and the cylindrical first The ring width of the tail end of the second spool is the same as the ring width of the front end of the second sleeve of the male plug, and the outer diameter of the front end of the second sleeve of the male plug is smaller than the inner diameter of the tail end of the second sleeve of the female plug; When the plug is mated with the female plug, the front end of the second sleeve of the male plug is inserted into the second sleeve of the female plug, and the front end of the second sleeve of the male plug pushes the second valve core in the second sleeve of the female plug. The barrel moves toward the front end of the second sleeve of the female plug to make the female plug communicate; at the same time, the second sealing disc pushes the first valve core in the second sleeve of the male plug to the second sleeve of the male plug The tail end of the plug moves so that the male plug communicates to realize the flow of fluid in the male plug and the female plug.

Further, the inner wall of the front end of the second sleeve of the male plug is protrudingly provided with a first annular sealing portion, and the inner wall of the first annular sealing portion is provided with a first annular groove; the outer diameter of the first sealing disc is in line with the first annular The inner diameter of the sealing part is suitable, and the first O-ring sealing ring is arranged in the first annular groove, so that when the first sealing disc of the first valve core is placed in the first annular sealing part, the The first O-ring is matched with the first valve core to form a seal.

Further, a first spring is also provided in the second sleeve of the male plug, a first annular step is provided in the inner wall of the first sleeve of the male plug, and the first spring is placed on the first annular step and the first spool, used to push the first spool back.

Further, the inner end surface of the first sealing disc is fixedly provided with a herringbone guide bracket, and the edge of the herringbone guide bracket protrudes outside the edge of the first sealing disc, and the first valve core is placed on the male When the plug is in the second sleeve, the outer edge of the herringbone guide bracket contacts the inner wall of the second sleeve of the male plug, so that the first valve core moves axially in the second sleeve of the male plug When forming a support, the herringbone guide bracket is limited by the first annular sealing part.

Furthermore, the second sleeve of the male plug is also provided with a cylindrical valve core sleeve that is slidingly fitted with the second sleeve of the male plug. The edge of the herringbone-shaped guide bracket is provided with a stepped portion. When assembling, the tail end of the cylindrical valve core sleeve is sleeved in the first spring, and the herringbone-shaped guide bracket is clamped and fitted on the said first spring through the stepped portion. The front end of the cylindrical spool cover, so that the first spring can push the first spool back.

Further, the inner diameter of the tail end of the first sleeve of the female plug is larger than the inner diameter of the front end of the first sleeve of the female plug, so that the connection between the tail end and the front end of the first sleeve of the female plug forms a third annular step; There is also a valve stem at the axis of the first sleeve of the female plug, and the front end of the valve rod is fixedly connected with the inner wall of the first sleeve of the female plug through a bracket; the second sealing disc is connected to the tail of the valve stem The ends are fixedly connected, so that the second sealing disk is arranged at the axis of the second sleeve of the female plug.

Further, the inner wall of the second valve core is provided with a fourth annular groove, and a fourth O-ring is arranged in the fourth annular groove, which is used to seal fit with the annular side wall of the second sealing disc; A second annular boss is arranged in the middle of the outer wall of the second valve core, and the outer end surface of the second annular boss cooperates with the side wall of the second annular sealing part to limit the position of the second valve core; A second spring is sleeved on the valve stem, and the second spring is placed between the inner end surface of the second annular boss and the third annular step portion for pushing the second valve core back.

Further, the valve rod is also sleeved with a spring sleeve that can slide in the axial direction, and the front end of the spring sleeve is placed in the cylindrical cavity at the front end of the first sleeve of the female plug. A third annular boss protrudes from the outer wall of the middle part, and a third spring is sleeved outside the spring sleeve, and the third spring is placed between the inner end surface of the third annular boss and the third annular step. Between, so that the tail end of the spring sleeve is in contact with the inner end surface of the second sealing disk, so that the inner cavity of the spring sleeve and the cylindrical cavity form a passage, and the outer wall of the spring sleeve is in contact with the second female plug. A buffer cavity is formed between the inner walls of the front end of the sleeve; a distance is left between the outer end surface of the third annular boss and the inner end of the second valve core, so that the second valve core During the movement of the front end of the second sleeve of the female plug, when the second spool does not touch the third annular boss, the spring sleeve remains stationary, and the second spool and the third After the annular bosses are in contact, the spring sleeve is driven to move toward the front end of the second sleeve of the female plug, so that the cylindrical cavity communicates with the buffer cavity.

Further, the male plug also includes a third sleeve of the male plug, the tail end of the first sleeve of the male plug is sealed and socketed in the third sleeve of the male plug, and the tail end of the third sleeve of the male plug The external wall of the male plug is provided with external threads to facilitate the connection between the male plug and the external pipeline; the female plug also includes a third sleeve of the female plug, and the front end of the first sleeve of the female plug is sealed in the third sleeve of the female plug Inside the barrel, the outer wall of the front end of the third sleeve of the female plug is provided with external threads of the female plug, so as to facilitate the connection of the female plug with the external pipeline.

The working method of the above-mentioned quick connector comprises the following steps:

A. When the male plug is in the initial state, the first spring supports the first spool to reach the front end of the second sleeve of the male plug, and the annular side wall of the first sealing disc is sealed with the first ring of the second sleeve of the male plug. The first O-ring is sealed and fitted, so that the male plug is in a closed state; when the female plug is in the initial state, the second spring supports the second valve core to reach the tail end of the second sleeve of the female plug, and the outer wall of the second valve core The second O-ring and the third O-ring are in sealing fit with the second annular sealing portion of the second sleeve of the female plug, and the inner wall of the second valve core is sealed through the fourth O-ring and the second sealing disc. The ring-shaped side wall of the third spring supports the tail end of the spring sleeve in contact with the inner end surface of the second sealing disk to isolate the cylindrical cavity and the buffer cavity, so that the female plug is in the Closed state.

B. When plugging in, push the front end of the second sleeve of the male plug into the second sleeve of the female plug in the axial direction, so that the second sealing disc pushes the first valve core to move on the second sleeve of the male plug. The second sleeve moves toward the tail end of the second sleeve of the male plug, the first spring is compressed, and the male plug is connected; at the same time, the front end of the second sleeve of the male plug pushes the second spool on the second sleeve of the female plug. The sleeve moves toward the front end of the second sleeve of the female plug, the second spring is compressed, and when the second spool does not touch the third annular boss, the spring sleeve remains stationary, and the second spool breaks away from the third annular boss. The second annular sealing part, the buffer cavity and the male plug are connected; the second valve core continues to move to the front end of the second sleeve of the female plug in the second sleeve of the female plug, and the second valve core contacts the second sleeve of the female plug. After the third annular boss, the spring sleeve is driven to move to the front end of the second sleeve of the female plug, the third spring is compressed, and the tail end of the spring sleeve is separated from the second sealing disc, and the cylindrical The cavity communicates with the buffer cavity, so that the male plug and the female plug are completely connected; at this time, the annular side wall of the first sealing disc is separated from the first annular sealing portion of the second sleeve of the male plug, The outer wall of the second sleeve of the male plug is in sealing fit with the second annular sealing portion of the second sleeve of the female plug through the second O-ring and the third O-ring.

C. When pulling out, the second sleeve of the male plug exits the second sleeve of the female plug under the rebound action of the first spring, the second spring, and the third spring. During this process, the spring sleeve, the second The spool and the first spool are reset, and the tail end of the spring sleeve is in contact with the inner side of the second sealing disc again, isolating the cylindrical cavity and the buffer cavity, and the inner wall of the second spool is in contact with the second sealing disc. The annular side wall of the second valve core is sealed and fitted through the fourth O-ring, and the outer wall of the second valve core is connected to the second annular sealing part of the second sleeve of the female plug through the second O-ring, the third O O-ring sealing fit, the annular side wall of the first sealing disc and the first annular sealing portion of the second sleeve of the male plug are in sealing fit through the first O-ring, ensuring no leakage during plugging and unplugging.

Technical effects of the utility model: (1) Compared with the prior art, the quick joint of the utility model uses the movable first valve core and the second valve core to respectively seal and cooperate with the annular sealing part of the sleeve, and the structure is simple. After mating, the second annular sealing part is sealed with the second sleeve of the male plug to effectively avoid leakage; (2) The herringbone guide bracket ensures that the first valve core will not tilt when sliding in the second sleeve of the male plug, The guide is stable, and at the same time, the outer edge of the herringbone guide bracket protrudes from the edge of the first sealing disk, so that after the first sealing disk slides to the second sleeve of the male plug, it is easy to form a channel suitable for the circulation of pressurized liquid, ensuring pressure. Rapid circulation of liquid; (3) The setting of the spring sleeve, in the process of pulling out the male plug, cuts off the pressure transmission between the cylindrical cavity and the buffer cavity, and forms a buffer for the second annular sealing part, effectively reducing the pressure. Reduce the pressure that the second annular sealing part needs to withstand during the pulling out process to avoid leakage; (4) O-rings are respectively arranged in the two annular grooves in the second annular sealing part to avoid double sealing rings in the same groove Extrude each other inside, causing damage to the sealing ring and blocking the second spool.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Fig. 1 is a schematic cross-sectional structure diagram of a male plug of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of a female plug of the present invention;

Fig. 3 is a schematic diagram of the three-dimensional structure of the first valve core of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the male plug and the female plug of the present invention after mating.

In the figure: the first sleeve 11 of the male plug, the second sleeve 12 of the male plug, the third sleeve 13 of the male plug, the first spring 14, the cylindrical valve core sleeve 15, the first annular step portion 16, the first annular convex Platform 17, first annular sealing portion 18, second annular step portion 19, first sleeve 21 of female plug, second sleeve 22 of female plug, third sleeve 23 of female plug, second spring 24, third spring 25 , Cylindrical cavity 26, second annular seal portion 27, bracket 28, third annular step portion 29, first O-ring seal 31, second O-ring seal 32, third O-ring seal 33, fourth O-ring seal 34, fifth O-ring seal 35, sixth O-ring seal 36, seventh O-ring seal 37, eighth O-ring seal 38, first spool 4, first sealing disc 41, Herringbone guide bracket 42, step portion 43, slope portion 44, second valve core 5, second annular boss 51, spring sleeve 52, third annular boss 53, buffer cavity 54, valve stem 61, second The sealing disc 62, the external thread 71 of the male plug, and the external thread 72 of the female plug.

detailed description

Embodiment 1 The quick connector with a buffer function in this embodiment includes a male plug and a female plug that are plugged together (for the convenience of discussion, when the components in the male plug refer to the front end, it refers to the end close to the connection between the male plug and the female plug. The opposite end is the tail end; when the parts in the female plug refer to the tail end, it refers to the end close to the connection between the male plug and the female plug, and the opposite end is the front end); as shown in Figure 1, the male plug includes the male plug The first sleeve 11, the second sleeve 12 of the male plug, the third sleeve 13 of the male plug, the tail end of the second sleeve 12 of the male plug is sealed in the front end of the first sleeve 11 of the male plug, the second A fifth annular groove is arranged on the outer wall of the tail end of the second sleeve 12, and a fifth O-ring 35 is arranged in the fifth annular groove, which is used for connecting the second sleeve 12 of the male plug and the first sleeve 11 of the male plug. The tail end of the first sleeve 11 of the male plug is sealed and sleeved in the third sleeve 13 of the male plug, and the inner wall of the front end of the third sleeve 13 of the male plug is provided with a sixth annular groove. A sixth O-ring seal 36 is arranged in the groove for sealing between the third sleeve 13 of the male plug and the first sleeve 11 of the male plug; The thread 71 is convenient for connecting the male plug with the external pipeline; the second sleeve 12 of the male plug is also provided with a first valve core 4 that can slide along its axial direction, and the front end of the first valve core 4 is provided with a first sealing disc 41, The inner end surface of the first sealing disc 41 is fixedly provided with a herringbone guide bracket 42, as shown in Figure 3, the edge of the herringbone guide bracket 42 protrudes and is arranged on the outside of the edge of the first sealing disc 41, and the first valve core 4 is placed When in the second sleeve 12 of the male plug, the outer edge of the herringbone guide bracket 42 is in contact with the inner wall of the second sleeve 12 of the male plug, so that the first valve core 4 moves along the axis in the second sleeve 12 of the male plug. Form support when moving.

The inner wall of the front end of the second sleeve 12 of the male plug is protrudingly provided with a first annular sealing portion 18, and the inner wall of the first annular sealing portion 18 is provided with a first annular groove; The inner diameter of the first ring groove is matched with the first O-ring 31, so that when the first sealing disc 41 of the first valve core 4 is placed in the first annular sealing part 18, the first O ring The sealing ring 31 cooperates with the first valve core 4 to form a seal.

The second sleeve 12 of the male plug is also provided with a first spring 14 and a cylindrical spool sleeve 15, and the cylindrical spool sleeve 15 is matched with the inner wall clearance of the second sleeve 12 of the male plug so that the cylindrical spool sleeve 15 It can slide along the inner wall of the second sleeve 12 of the male plug; the outer wall of the cylindrical valve core sleeve 15 protrudes along its circumferential direction to set a first annular boss 17, as shown in Figure 4, the edge of the herringbone guide bracket 42 is set The step part 43, when assembled, the tail end of the cylindrical valve core sleeve 15 is sleeved in the first spring 14, and the herringbone guide bracket 42 is clamped and fitted in the front end of the cylindrical valve core sleeve 15 through the step part 43; A first annular step 16 is provided on the inner wall of a sleeve 11, and the first spring 14 is placed between the first annular step 16 and the herringbone guide bracket 42, so that the first spring 14 can push the first valve core 4 to reset . The opposite inner wall of the first annular sealing part 18 is provided with a tapered transition part, and the front end surface of the edge step part 43 of the herringbone guide bracket 42 is provided with a slope part 44 matching the tapered transition part, so that the first valve core 4 can move When reaching the front end of the second sleeve 12 of the male plug, the first valve core 4 is limited by the cooperation of the tapered transition portion and the slope portion 44 .

As shown in Figure 2, the female plug includes a female plug first sleeve 21, a female plug second sleeve 22, and a female plug third sleeve 23. The front end of the female plug second sleeve 22 is sealed and sleeved on the female plug first In the tail end of the sleeve 21, the front end of the first sleeve 21 of the female plug is sealed and sleeved in the third sleeve 13 of the female plug. Groove, the eighth O-ring 38 is arranged in the eighth annular groove, which is used to seal between the second sleeve 22 of the female plug and the first sleeve 21 of the female plug; the inner wall of the front end of the third sleeve 13 of the female plug A seventh annular groove is provided, and a seventh O-ring 37 is arranged in the seventh annular groove for sealing between the third sleeve 23 of the female plug and the first sleeve 21 of the female plug; the third sleeve of the female plug The outer wall of the front end of the sleeve 23 is provided with a female plug external thread 72, which is convenient for the female plug to be connected with the external pipeline.

The inner diameter of the tail end of the first sleeve 21 of the female plug is larger than the inner diameter of the front end of the first sleeve 21 of the female plug, so that the connection between the tail end and the front end of the first sleeve 21 of the female plug forms a third annular step 29; the female plug The shaft center of the first sleeve 21 is also provided with a valve rod 61, the front end of the valve rod 61 is fixedly connected with the inner wall of the first sleeve 21 of the female plug through the bracket 28; the tail end of the valve rod 61 extends to the second female plug. Inside the second sleeve 22, and the tail end of the valve stem 61 is coaxially fixed with a second sealing disc 62.

Between the annular side wall of the second sealing disc 62 and the annular inner wall of the second sleeve 22 of the female plug, a cylindrical second valve core 5 that can slide in the axial direction is arranged, and a fourth annular valve core 5 is arranged on the inner wall of the second valve core 5 . Groove, the fourth O-ring sealing ring 34 is arranged in the fourth annular groove, which is used for sealing engagement with the annular side wall of the second sealing disc 62 . A second annular sealing portion 27 protrudes from the inner wall of the tail end of the second sleeve 22 of the female plug. The inner wall of the second annular sealing portion 27 is provided with a second annular groove and a third annular groove in parallel. The second annular groove, A second O-ring 32 and a third O-ring 33 are respectively arranged in the third annular groove, which are used to form a sealing fit with the annular outer wall of the second valve core 5 opposite to the second annular sealing part 27 .

The middle part of the outer wall of the second valve core 5 is provided with a second annular boss 51, and the outer end surface of the second annular boss 51 cooperates with the side wall of the second annular sealing part 27 to limit the second valve core 5; the valve stem 61 The second spring 24 is sleeved on the top, and the second spring 24 is placed between the inner end surface of the second annular boss 51 and the third annular step portion 29 to push the second valve core 5 back; There is a spring sleeve 52 that can slide in the axial direction, and the spring sleeve 52 is placed in the second spring 24; the front end of the spring sleeve 52 is placed in the cylindrical cavity 26 at the front end of the first sleeve 11 of the female plug A third annular boss 53 protrudes from the middle outer wall of the spring sleeve 52, and a third spring 25 is sleeved outside the spring sleeve 52, and the third spring 25 is placed on the inner end surface of the third annular boss 53. and the third annular step portion 29, so that the tail end of the spring sleeve 52 is in contact with the inner end surface of the second sealing disc 62, so that the inner cavity of the spring sleeve 52 forms a passage with the cylindrical cavity 26, and the spring sleeve 52 A buffer cavity 54 is formed between the outer wall and the inner wall of the front end of the first sleeve 21 of the female plug; a distance is left between the outer end surface of the third annular boss 53 and the inner end of the second valve core 5, so that the second valve When the core 5 moves to the front end of the second sleeve 22 of the female plug, when the second valve core 5 does not touch the third annular boss 53, the spring sleeve 52 remains stationary, and the second valve core 5 and the third annular boss After the stage 53 is in contact, the spring sleeve 52 is driven to move toward the front end of the second sleeve 22 of the female plug, so that the cylindrical cavity 26 communicates with the buffer cavity 54 .

As shown in Figure 4, the diameter of the second sealing disc 62 is the same as that of the first sealing disc 41, the outer diameter of the tail end of the cylindrical second valve core 5 is the same as the outer diameter of the front end of the second sleeve 12 of the male plug, and The ring width of the tail end of the second spool 5 is the same as the ring width of the front end of the second sleeve 12 of the male plug, the outer diameter of the front end of the second sleeve 12 of the male plug is smaller than the inner diameter of the second sleeve 22 tail end of the female plug, and The outer wall of the front end of the second sleeve 12 is provided with a first annular boss 17; The position is limited by the platform 17, and the front end of the second sleeve 12 of the male plug pushes the second valve core 5 to move to the front end of the second sleeve 22 of the female plug in the second sleeve 22 of the female plug, and at the same time, the second sealing disc 62 pushes the first The spool 4 moves in the second sleeve 12 of the male plug to the tail end of the second sleeve 12 of the male plug to realize the flow of fluid in the male plug and the female plug.

Example 2

The working method of quick coupling as described in embodiment 1, comprises the steps:

A. When the male plug is in the initial state, the first spring 14 supports the first valve core 4 to reach the front end of the second sleeve 12 of the male plug. An annular sealing part 18 is sealed and fitted through the first O-ring 31, so that the male plug is in a closed state; when the female plug is in the initial state, the second spring 24 supports the second valve core 5 to reach the end of the second sleeve 22 of the female plug end, the outer wall of the second spool 5 seals with the second annular sealing portion 27 of the second sleeve 22 of the female plug through the second O-ring 32 and the third O-ring 33 , and the inner wall of the second spool 5 Through the sealing fit of the fourth O-ring 34 and the annular side wall of the second sealing disc 62, the tail end of the third spring 25 supporting the spring sleeve 52 is in contact with the inner end surface of the second sealing disc 62, so that the female plug is in the In the closed state, the cylindrical cavity 26 and the buffer cavity 54 are isolated at the same time.

B. When mating, push the front end of the second sleeve 12 of the male plug into the second sleeve 22 of the female plug in the axial direction, so that the second sealing disc 62 pushes the first valve core 4 on the second sleeve 12 of the male plug. Move inward to the tail end of the second sleeve 12 of the male plug, the first spring 14 is compressed, and the male plug is connected; at the same time, the front end of the second sleeve 12 of the male plug pushes the second valve core 5 in the second sleeve 22 of the female plug to the female. The front end of the second sleeve 22 of the plug moves, and the second spring 24 is compressed. When the second valve core 5 does not touch the third annular boss 53, the spring sleeve 52 remains stationary, and the second valve core 5 breaks away from the second annular sealing part. 27. The buffer cavity 54 is connected to the male plug; the second spool 5 continues to move to the front end of the second sleeve 22 of the female plug in the second sleeve 22 of the female plug, and the second spool 5 contacts the third annular boss After 53, the spring sleeve 52 is driven to move to the front end of the second sleeve 22 of the female plug. At this time, the third spring 25 is compressed, so that the tail end of the spring sleeve 52 is separated from the second sealing disc 62, and the cylindrical cavity 26 is in contact with the buffer The cavities 54 communicate with each other, so that the male plug and the female plug are completely connected; at this time, the annular side wall of the first sealing disc 41 breaks away from the first annular sealing portion 18 of the second sleeve 12 of the male plug, and the second sleeve of the male plug The outer wall of the sleeve 12 is sealed with the second annular sealing portion 27 of the second sleeve 22 of the female plug through the second O-ring 32 and the third O-ring 33. Due to the existence of the spring sleeve 52, the female plug The second annular sealing portion 27 of the second sleeve 22 cuts off the pressure on the second annular sealing portion 27 in the female plug when the second sleeve 12 of the male plug begins to enter and the second valve core 5 begins to retreat. Leakage during the initial mating process can be avoided.

C. When pulling out, the second sleeve 12 of the male plug exits the second sleeve 22 of the female plug under the rebound action of the first spring 14, the second spring 24, and the third spring 25. During this process, the spring sleeve 52. The second spool 5 and the first spool 4 are reset, when the second sleeve 12 of the male plug is about to completely withdraw and the second spool 5 completely enters the second annular sealing part 27 of the second sleeve 22 of the female plug During the process, the tail end of the spring sleeve 52 is in contact with the inner end of the second sealing disc 62 again, which can isolate the cylindrical cavity 26 and the buffer cavity 54, and cut off the pressure on the second annular sealing part 27 in the female plug , so that the pressure at the moment when the male plug is detached is reduced; after the male plug is completely detached, the inner wall of the second valve core 5 and the annular side wall of the second sealing disc 62 are sealed and fitted through the fourth O-ring 34 , the first The outer wall of the second spool 5 and the second annular sealing part 27 of the second sleeve 22 of the female plug are sealed and matched through the second O-ring 32 and the third O-ring 33 , and the annular side wall of the first sealing disc 41 The sealing fit with the first annular sealing portion 18 of the second sleeve 12 of the male plug via the first O-ring 31 ensures no leakage during plugging and unplugging.

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the utility model, rather than limiting the implementation manner of the utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or modifications derived from the spirit of the present utility model are still within the protection scope of the present utility model.

Claims (9)

1. A quick connector, characterized in that it includes: a male plug and a female plug that are plugged and mated; the male plug includes a first male plug sleeve (11), a male plug second sleeve (12), and the The tail end of the second sleeve (12) of the male plug is sealed and sleeved in the front end of the first sleeve (11) of the male plug, and the second sleeve (12) of the male plug is also equipped with a The first spool (4) that slides toward the front end of the first spool (4) is provided with a first sealing disc (41), and the annular side wall of the first sealing disc (41) is in contact with the first male plug. The annular inner wall of the second sleeve (12) is tightly fitted; The female plug includes a female plug first sleeve (21) and a female plug second sleeve (22). In the tail end of (21), a second sealing disc (62) is fixed inside the second sleeve (22) of the female plug, and the annular side wall of the second sealing disc (62) is connected with the second sleeve of the female plug. A cylindrical second spool (5) that can slide axially is arranged between the annular inner walls of the sleeve (22), and the inner wall of the second spool (5) is in contact with the ring of the second sealing disc (62). The inner wall of the tail end of the second sleeve (22) of the female plug is protrudingly provided with a second annular sealing part (27), and the inner wall of the second annular sealing part (27) is provided with a second annular recess in parallel. A groove and a third annular groove, the second O-ring seal (31) and the third O-ring seal (32) are respectively arranged in the second annular groove and the third annular groove; The diameter of the second sealing disc (62) is the same as that of the first sealing disc (41), and the outer diameter of the tail end of the cylindrical second valve core (5) is the same as that of the second sleeve of the male plug ( 12) The outer diameter of the front end is the same, and the ring width of the tail end of the cylindrical second valve core (5) is the same as the ring width of the front end of the second sleeve (12) of the male plug, and the second sleeve (12) of the male plug ) the outer diameter of the front end is smaller than the inner diameter of the tail end of the second sleeve (22) of the female plug. 2. The quick connector according to claim 1, characterized in that, the inner wall of the front end of the second sleeve (12) of the male plug is protrudingly provided with a first annular sealing portion (18), and the first annular sealing portion (18) ) is provided with a first annular groove; the outer diameter of the first sealing disc (41) is adapted to the inner diameter of the first annular sealing part (18), and a first O-shaped Seal ring (31). 3. The quick connector according to claim 2, characterized in that, a first spring (14) is provided inside the second sleeve (12) of the male plug, and the first spring (11) of the male plug A first annular step (16) is arranged in the inner wall, and the first spring (14) is placed between the first annular step (16) and the first valve core (4). 4. The quick connector according to claim 3, characterized in that, the inner end surface of the first sealing disc (41) is fixedly provided with a herringbone guide bracket (42), and the edge of the herringbone guide bracket (42) protrudes It is arranged on the outer side of the edge of the first sealing disc (41), when the first valve core (4) is placed in the second sleeve (12) of the male plug, the outer side of the herringbone guide bracket (42) The edge is in contact with the inner wall of the second sleeve (12) of the male plug. 5. The quick connector according to claim 4, characterized in that, there is also a cylindrical valve core in the second sleeve (12) of the male plug that slides with the second sleeve (12) of the male plug sleeve (15), the outer wall of the cylindrical valve core sleeve (15) protrudes along its circumferential direction to provide a first annular boss (17), and the edge of the herringbone guide bracket (42) is provided with a step portion (43), When assembling, the tail end of the cylindrical valve core sleeve (15) is sleeved in the first spring (14), and the herringbone guide bracket (42) is clamped and fitted on the cylindrical valve through the step part (43). The front end of the core sleeve (15). 6. The quick connector according to claim 5, characterized in that, the inner diameter of the tail end of the first sleeve (21) of the female plug is larger than the inner diameter of the front end of the first sleeve (21) of the female plug, so that the female plug The connection between the tail end and the front end of the first sleeve (21) of the plug forms a third annular step (29); the shaft center of the first sleeve (21) of the female plug is also provided with a valve stem (61), the valve The front end of the rod (61) is fixedly connected with the inner wall of the first sleeve (21) of the female plug through the bracket (28); the second sealing disc (62) is fixedly connected with the tail end of the valve rod (61) . 7. The quick connector according to claim 6, characterized in that, the inner wall of the second valve core (5) is provided with a fourth annular groove, and a fourth O-ring ( 34); the middle part of the outer wall of the second valve core (5) is provided with a second annular boss (51), and the outer end surface of the second annular boss (51) is in contact with the second annular sealing part (27) The side wall cooperates to limit the second valve core (5); the second spring (24) is sleeved on the valve stem (61), and the second spring (24) is placed on the second annular protrusion between the inner end surface of the platform (51) and the third annular step portion (29). 8. The quick connector according to claim 7, characterized in that, a spring sleeve (52) that can slide in the axial direction is sleeved on the valve stem (61), and the front end of the spring sleeve (52) Placed in the cylindrical cavity (26) at the front end of the first sleeve (11) of the female plug, a third annular boss (53) protrudes from the middle outer wall of the spring sleeve (52), and the spring A third spring (25) is sheathed outside the sleeve (52), and the third spring (25) is placed between the inner end surface of the third annular boss (53) and the third annular step (29) Between, so that the tail end of the spring sleeve (52) is in contact with the inner end surface of the second sealing disk (62), so that the inner cavity of the spring sleeve (52) and the cylindrical cavity (26) are formed channel, a buffer cavity (54) is formed between the outer wall of the spring sleeve (52) and the inner wall of the front end of the first sleeve (21) of the female plug; the outer end surface of the third annular boss (53) and the A space is left between the inner ends of the second spool (5). 9. The quick connector according to claim 8, characterized in that, the male plug further comprises a third sleeve (13) of the male plug, and the tail end of the first sleeve (11) of the male plug is sealed and sleeved on the In the third sleeve (13) of the male plug, the outer wall of the tail end of the third sleeve (13) of the male plug is provided with an external thread (71) of the male plug; the female plug also includes a third sleeve (23) of the female plug ), the front end of the first sleeve (21) of the female plug is sealed and sleeved in the third sleeve (23) of the female plug, and the outer wall of the front end of the third sleeve (23) of the female plug is provided with an external thread of the female plug (72).