Plane quick connector capable of achieving quick connection and application method of plane quick connector

Abstract

The invention relates to the technical field of quick connection devices, and discloses a plane quick connector capable of achieving quick connection and an application method thereof.The plane quick connector comprises a plug assembly, a socket assembly and a locking mechanism, and the plug assembly comprises a plug body, a one-way valve element, a valve element spring and a guide sleeve; the socket assembly comprises a socket body, a fixed valve element, a jacking bush and a bush spring. The locking mechanism comprises a metal elastic ring sleeve and clamping balls, a plurality of hemispherical grooves are distributed in the outer side wall, facing the end of the socket body, of the plug body in the circumferential direction of the plug body, the clamping balls correspond to the hemispherical grooves in a one-to-one mode and are matched with the hemispherical grooves in an inserted mode, and the one-way valve element and the fixed valve element are in plane fit. And the quick connection and locking of the plug and the socket are realized through the matching of the clamping ball and the semispherical groove. The quick connector is easy and convenient to operate in the connecting and disconnecting process, has good sealing performance, effectively prevents liquid or gas leakage, and improves use safety and reliability.

Description

Technical Field

[0001] The present application relates to the technical field of quick connection devices, and in particular to a quickly connectable planar quick connector and an application method thereof. Background Art

[0002] As a critical fluid transfer device, quick connectors are widely used in industries such as air, oxygen, fuel gas, gas-liquid mixtures, oil pressure, inert gas, cooling water, warm oil, and semiconductors. Quick connectors enable rapid connection and disconnection of pipelines without the need for tools, significantly improving production efficiency and safety. With the advancement of industrial automation and intelligent manufacturing, quick connectors are not only widely used in traditional manufacturing but also play a vital role in emerging high-tech industries. These connectors must not only meet basic functional requirements but also possess enhanced reliability and durability to adapt to increasingly complex working environments.

[0003] In the prior art, common quick connectors usually use a variety of locking mechanisms to achieve connection and disconnection. Among them, the most common is a locking system composed of components such as a plug, a socket, a jacket, and an internal spring. Specifically, when a connection is required, the operator aligns the plug with the socket and pushes the jacket to push the plug into the socket. After the plug is inserted, the jacket is released, and the jacket returns to its original position through the action of the internal spring, thereby locking the plug. Another common design solution is to use a threaded connection to tightly connect the plug and the socket together by rotating the nut. Some quick connectors also use a magnetic locking mechanism to achieve quick connection and disconnection through the attraction of a magnet. Although these traditional designs can meet basic usage requirements, they still have some shortcomings in specific application scenarios.

[0004] While these traditional designs perform well in many situations, they are susceptible to wear over time. Frequent connection and disconnection, in particular, can cause wear on the moving parts of the housing and valve core, leading to reduced sealing performance and even leakage. Furthermore, with frequent use, traditional quick connectors can become unstable due to mechanical fatigue, posing a threat to equipment safety and reliability. Summary of the Invention

[0005] In order to improve the stability and sealing of the connection, the present application provides a quickly connectable planar quick connector and an application method thereof.

[0006] The present application provides a quick-connect flat quick connector and its application method using the following technical solutions: A flat quick connector that can be quickly connected, comprising a plug assembly, a socket assembly and a locking mechanism; the plug assembly includes a plug body, a one-way valve core slidably arranged in the plug body, and a valve core spring abutted between the one-way valve core and the inner side wall of the plug body; the socket assembly includes a socket body, a fixed valve core fixedly arranged in the socket body, a top stop bushing slidably sleeved on the socket body, and a bushing spring abutted between the top stop bushing and the inner side wall of the socket body; the locking mechanism includes a metal elastic ring sleeve and a plurality of catch balls arranged on the inner side wall of one end of the metal elastic ring sleeve facing the plug body, and a plurality of hemispherical grooves are circumferentially distributed on the outer side wall of the end of the plug body facing the socket body, and the catch balls correspond to the hemispherical grooves one by one and are inserted and matched, and the one-way valve core is in planar contact with the fixed valve core.

[0007] By adopting the above technical solutions, the plug body and the socket body are quickly connected and disconnected through the cooperation of the catch balls and the hemispherical grooves, and the design of the planar contact between the one-way valve core and the fixed valve core ensures the smooth opening and closing of the flow channel. Since the quick connector adopts a matching method in which the valve core in the socket is fixedly arranged and the valve core in the plug is movably arranged, when the plug is pulled out, the elastic force of the bushing spring acts on the top stop bushing and does not conflict with the elastic force of the valve core spring. Therefore, the wear between components can be effectively reduced during the use of the quick connector, the connection stability and sealing performance are improved, and the leakage problem caused by wear during the frequent use of the traditional connector is effectively avoided.

[0008] Optionally, a dust cover is rotatably sleeved on the socket body through a thread, the dust cover covers the outer circumference of the top stop bushing, and an activity groove is opened on the inner side wall of the end of the dust cover facing the top stop bushing. The metal elastic ring sleeve is located in the activity groove of the dust cover, and the end of the metal elastic ring sleeve is coaxially fixed on the inner side wall of the activity groove. A plurality of notches are circumferentially distributed on the side end wall of the metal elastic ring sleeve facing the plug body, and the catch balls are arranged on the inner wall of the end of the metal elastic ring sleeve adjacent to the notches.

[0009] By adopting the above technical solutions, the metal elastic ring sleeve is rotatably sleeved on the socket body through a thread, which enhances the convenience and firmness of installation. At the same time, it covers the outer circumference of the top stop bushing, effectively preventing external impurities from entering and affecting the operation of the locking mechanism. The plurality of notches circumferentially distributed on the side end wall of the metal elastic ring sleeve facing the plug body enable the catch balls to flexibly embed and disengage from the hemispherical grooves, improving the speed and reliability of connection and disconnection. The catch balls are arranged on the inner wall of the end of the metal elastic ring sleeve adjacent to the notches, ensuring that the catch balls can accurately embed into the hemispherical grooves when stressed, further enhancing the connection stability and sealing performance.

[0010] Optionally, the plug assembly further comprises a guide sleeve which is threadably sleeved on the plug body, and the guide sleeve is used to confine the one-way valve core within a space enclosed by the guide sleeve and the plug body.

[0011] By adopting this technical solution, the guide sleeve is threadedly attached to the plug body, effectively preventing the one-way valve core from moving freely within the plug body, ensuring that the one-way valve core is always located within the space enclosed by the guide sleeve and the plug body. This design not only improves the structural stability of the plug assembly, but also facilitates the replacement of worn parts within the plug body, reducing the maintenance cost of the quick connector. It also ensures the precise positioning of the one-way valve core during the connection process, enhancing the reliability and sealing performance of the connection.

[0012] Optionally, a groove is provided on the outer wall of the guide sleeve facing one end of the socket body, the hemispherical groove is distributed in the groove, and a metal sheet is laid in the hemispherical groove and the groove. The metal sheet is recessed in the groove according to the size of the hemispherical groove and the groove, and there is a gap between the metal sheet and the hemispherical groove and the groove.

[0013] By adopting this technical solution, the groove and hemispherical groove on the guide sleeve can more accurately locate the snap-in ball, improving the stability of the connection between the plug body and the socket body. Furthermore, when the snap-in ball is inserted into the hemispherical groove, it strikes the metal plate with a crisp sound, indicating to the user that the plug and socket bodies are properly connected, thus improving the convenience of using the quick connector.

[0014] Optionally, the guide sleeve is provided with a locking piece for preventing the metal elastic ring sleeve from deforming, and the locking piece includes a fixed ring plate, an adjustable spring and a locking ring. The fixed ring plate is sleeved on the guide sleeve, and the locking ring is plugged into the movable groove. The adjustable spring is connected between the fixed ring plate and the locking ring, and there are multiple springs distributed along the circumference of the guide sleeve. The end wall of the locking ring close to the fixed ring plate is provided with an anti-slip ridge for easy hand-shifting. When the locking ring is inserted into the movable groove, the snap-on ball is pressed tightly in the hemispherical groove.

[0015] By adopting the above technical solution, after the plug body and the socket body are mated, the locking ring is manually moved and inserted into the movable groove to press the metal elastic ring sleeve, so that the locking ball is tightly pressed into the hemispherical groove. This prevents the metal elastic ring sleeve from deforming due to excessive impact force from air or liquid flow in the tank when the quick connector is in use, which may cause the quick connector to disconnect, further improving the stability and sealing of the quick connector connection. When the quick connector needs to be disconnected, the locking ring is pushed out of the movable groove under the action of the spring force, and then the quick connector is disconnected, thus achieving a quick disconnect operation of the quick connector.

[0016] Optionally, a guiding through-hole is axially formed on the side of the dust cover away from the clamping ball. A slanting push block is slidably arranged in the guiding through-hole. A guiding surface that fits the inclined surface of the slanting push block is formed on the end of the top stop bushing close to the slanting push block. A T-shaped pressing block is coaxially connected to the end of the slanting push block facing the outside. A compression spring that abuts between the dust cover and the pressing block is sleeved on the pressing block.

[0017] By adopting the above technical solution, the sliding fit between the slanting push block and the guiding through-hole and the interaction between the inclined surface and the guiding surface ensure that the top stop bushing can accurately move towards the plug body when pushed by the slanting push block, so as to effectively push the clamping ball out of the hemispherical groove and achieve quick unlocking. At the same time, the design of the pressing block facilitates the operator to manually apply pressure, and the setting of the compression spring ensures that the slanting push block can automatically reset when not subjected to external force, improving the convenience and reliability of operation.

[0018] Optionally, a protective cover is arranged on the dust cover. The protective cover is made of a rubber material with a relatively high hardness and is used to cover the pressing block and the compression spring on the dust cover.

[0019] By adopting the above technical solution, the protective cover can effectively prevent external impurities from entering the metal elastic ring sleeve, avoid the pressing block and the compression spring from being contaminated or damaged, and thus extend the service life. At the same time, the high-hardness rubber material of the protective cover has good wear resistance and anti-aging performance, ensuring good protection effect under various working conditions. In addition, the protective cover can also reduce accidental touch of the pressing block during operation, improving the safety and reliability of use.

[0020] Optionally, a first sealing ring is annularly arranged on the inner side wall of the sleeve of the top stop bushing close to the end. The first sealing ring is in sealing fit with the inner side wall of the socket body.

[0021] By adopting the above technical solution, the setting of the first sealing ring effectively enhances the sealing performance between the top stop bushing and the socket body, prevents fluid from leaking from the gap between the two under high-pressure environment, and improves the overall sealing performance and reliability of the quick connector.

[0022] Optionally, second sealing rings are sleeved on the outer side wall of the outer circle of the opposite ends of the one-way valve core and the fixed valve core. When the plug assembly and the socket assembly are in a separated state, the second sealing ring on the one-way valve core is in sealing fit with the inner side wall of the guiding sleeve, and the second sealing ring on the fixed valve core is in sealing fit with the inner side wall of the top stop bushing.

[0023] By adopting the above technical solution, it is ensured that the plug assembly and the socket assembly have good sealing performance in the separated state, effectively preventing fluid from leaking in the non-connected state and improving the safety and reliability of the system.

[0024] A quick-connect flat quick connector and an application method thereof, comprising the following steps: S1: connecting end surface of the plug body and the socket body; S2: Push the plug body into the socket body; S3: Continue to push the plug body toward the socket body until you hear a crisp sound between the catch ball and the metal sheet. Stop pushing. At this time, the flow channel between the plug body and the socket body is opened. S4: Manually push the locking ring into the movable groove and press it against the metal elastic ring sleeve. At this time, the clamping ball is pressed tightly into the hemispherical groove; S5: When the plug body and the socket body need to be disconnected, the locking ring is manually pushed out of the movable groove, and then the pressing block is pressed through the protective cover, and the plug body is quickly separated from the socket body.

[0025] By adopting the above technical solution, the quick connector utilizes the plug-in fit between the snap-in ball on the metal elastic ring sleeve and the hemispherical groove on the guide sleeve to ensure a firm connection between the plug body and the socket body; and during its application, the one-way valve core and the fixed valve core are flatly fitted, as well as the design of multiple sealing rings (such as sealing ring 1 and sealing ring 2) to ensure that the fluid channel is tightly sealed in both the connected and disconnected states to avoid leakage; and the pressing block and the compression spring cover are arranged on the metal elastic ring sleeve through a protective sleeve to avoid safety hazards caused by misoperation. At the same time, during the disconnection process, the inclined push block pushes the top stop bushing through the inclined surface to ensure smooth and safe disconnection. No additional tools are required during the entire connection process of the quick connector, and connection and disconnection can be completed with a simple push and press operation, which greatly improves the convenience of operation and work efficiency. In summary, this application includes at least one of the following beneficial technical effects: 1. The plug and socket bodies connect and disconnect quickly through the fit of the snap-in ball and hemispherical groove. The flat fit between the one-way valve core and the fixed valve core ensures smooth opening and closing of the flow channel. Because the quick connector uses a fixed valve core in the socket and a movable valve core in the plug, when the plug is removed, the spring force of the bushing acts on the stop bushing, which does not conflict with the spring force of the valve core. This effectively reduces wear between components during use, improves connection stability and sealing, and effectively avoids leakage problems caused by wear and tear during frequent use of traditional connectors. 2. The metal elastic ring sleeve is sleeved on the socket body through threaded rotation, which enhances the convenience and firmness of installation. At the same time, it covers the outer periphery of the top stop bushing, effectively preventing external impurities from entering and affecting the operation of the locking mechanism. A number of notches are circumferentially distributed on the end wall of the metal elastic ring sleeve facing the plug body, enabling the snap balls to flexibly embed and disengage from the hemispherical grooves, improving the speed and reliability of connection and disconnection. The snap balls are arranged on the inner wall of the end of the metal elastic ring sleeve adjacent to the notches, ensuring that the snap balls can accurately embed into the hemispherical grooves when stressed, further enhancing the stability and sealing performance of the connection; 3. The grooves and hemispherical grooves provided on the guide sleeve can more accurately position the snap balls, improving the stability of the connection between the plug body and the socket body. At the same time, when the snap balls are inserted into the hemispherical grooves, the snap balls strike the metal sheet and make a crisp sound, thus prompting the user that the plug body and the socket body are plugged in place at this time, improving the convenience of using the quick connector. Brief Description of the Drawings

[0026] Figure 1 is the internal structure sectional view showing the connection between the plug body and the socket body in the embodiment of the present application.

[0027] Figure 2 is the internal structure sectional view showing the disconnection between the plug body and the socket body in the embodiment of the present application.

[0028] Figure 3 is the sectional view showing the positional relationship between the guide sleeve and the metal sheet in the embodiment of the present application.

[0029] Figure 4 is the structural schematic diagram showing the metal elastic ring sleeve in the embodiment of the present application.

[0030] Figure 5 is the sectional view showing the connection relationship between the dust cover, the inclined push block and the pressing block in the embodiment of the present application.

[0031] Description of the Reference Numerals: 1. Plug assembly; 11. Plug body; 12. One-way valve core; 13. Valve core spring; 14. Guide sleeve; 141. Hemispherical groove; 142. Groove; 2. Socket assembly; 21. Socket body; 22. Fixed valve core; 23. Top stop bushing; 24. Bushing spring; 3. Locking mechanism; 31. Metal elastic ring sleeve; 311. Notch; 32. Snap ball; 4. Metal sheet; 5. Locking member; 51. Fixed ring plate; 52. Adjustable spring; 53. Locking ring; 531. Anti-slip convex rib; 6. Seal ring I; 7. Dust cover; 71. Activity groove; 72. Guide through hole; 73. Inclined push block; 731. Pressing block; 732. Compression spring; 8. Seal ring II; 9. Protective sleeve. Detailed Description of the Embodiment

[0032] The following will further elaborate on this application in conjunction with the accompanying Figures 1-5 drawings.

[0033] An embodiment of this application discloses a flat quick connector that can be quickly connected and its application method.

[0034] Referring to Figure 1 and Figure 2 , a flat quick connector that can be quickly connected includes a plug assembly 1, a socket assembly 2, and a locking mechanism 3. Among them, the plug assembly 1 includes a plug body 11, a one-way valve core 12, a valve core spring 13, and a guide sleeve 14; the socket assembly 2 includes a socket body 21, a fixed valve core 22, a stop bushing 23, and a bushing spring 24; the locking mechanism 3 includes a metal elastic ring sleeve 31 and a catch ball 32. A plurality of hemispherical grooves 141 are circumferentially distributed on the outer side wall of one end of the guide sleeve 14 facing the socket body 21. The catch balls 32 correspond to the hemispherical grooves 141 one by one and are inserted and matched, and the one-way valve core 12 and the fixed valve core 22 are in planar contact.

[0035] Referring to Figure 1 and Figure 2 , the plug body 11 and the socket body 21 are quickly connected and disconnected through the cooperation of the catch balls 32 and the hemispherical grooves 141, and the design of the planar contact between the one-way valve core 12 and the fixed valve core 22 ensures the smooth opening and closing of the flow channel. Since the quick connector adopts a cooperation method in which the fixed valve core 22 is fixedly arranged and the one-way valve core 12 is movably arranged, when the plug body 11 is pulled out, the elastic force of the bushing spring 24 acts on the stop bushing 23 and does not conflict with the elastic force of the valve core spring 13. Therefore, the wear between components can be effectively reduced during the use of the quick connector.

[0036] Referring to Figure 1 and 2 , the one-way valve core 12 is slidably arranged in the plug body 11. The guide sleeve 14 is rotatably sleeved on the plug body 11 through a thread and confines the one-way valve core 12 in the space surrounded by the guide sleeve 14 and the plug body 11, and the valve core spring 13 abuts between the one-way valve core 12 and the inner side wall of the plug body 11.

[0037] Referring to Figure 1 and Figure 3, a groove 142 is provided on the outer side wall of one end of the guide sleeve 14 facing the socket body 21. Hemispherical grooves 141 are distributed in the groove 142 and are communicated with the groove 142. A metal sheet 4 is laid in the hemispherical grooves 141 and the groove 142 together. The metal sheet 4 is recessed in the groove 142 to fit the sizes of the hemispherical grooves 141 and the groove 142, and there is a gap between the metal sheet 4 and the hemispherical grooves 141 and the groove 142. Thus, when the clamping ball 32 is inserted into the hemispherical groove 141, it instantaneously impacts on the metal sheet 4 to emit a clear knocking sound, which is used to prompt that the quick connector is connected in place at this time.

[0038] Refer to Figure 1 and Figure 2 , a locking member 5 is provided on the guide sleeve 14. The locking member 5 includes a fixed ring plate 51, an adjustable spring 52 and a locking ring 53. The fixed ring plate 51 is rotatably sleeved on the guide sleeve 14 through threads. The locking ring 53 is inserted and matched with the movable groove 71. The adjustable spring 52 is fixedly connected between the fixed ring plate 51 and the locking ring 53, and a plurality of them are distributed along the circumferential direction of the guide sleeve 14. In this embodiment, four are taken as an example. A number of anti-slip ridges 531 are fixedly provided on the end wall of the locking ring 53 close to the fixed ring plate 51. When the locking ring 53 is manually toggled and inserted into the movable groove 71, the clamping ball 32 is pressed tightly in the metal sheet 4.

[0039] Refer to Figure 1 and Figure 2 , the fixed valve core 22 is fixedly arranged in the socket body 21. The top stop bushing 23 is located facing the one-way valve core 12 of the socket body 21 and is slidably sleeved on the socket body 21. A first sealing ring 6 is provided on the inner side wall of the sleeve of the top stop bushing 23 near the end. The first sealing ring 6 is in sealing cooperation with the inner side wall of the socket body 21, so as to prevent fluid from leaking from the gap between the socket body 21 and the top stop bushing 23 under high-pressure environment. The bushing spring 24 abuts between the inner side walls of the top stop bushing 23 and the socket body 21 opposite to each other.

[0040] Refer to Figure 1 and Figure 4 , a dust cover 7 is rotatably sleeved on the socket body 21 through threads. The dust cover 7 covers the outer circumference of the top stop bushing 23. An activity groove 71 is provided on the inner side wall of the end of the dust cover 7 facing the top stop bushing 23. The metal elastic ring sleeve 31 is located in the activity groove 71 of the dust cover 7, and the end of the metal elastic ring sleeve 31 is coaxially fixedly arranged on the inner side wall of the activity groove 71. A number of notches 311 are distributed along the circumferential direction on the side end wall of the metal elastic ring sleeve 31 facing the plug body 11. The clamping ball 32 is integrally formed on the inner wall of the end of the metal elastic ring sleeve 31 adjacent to the notch 311.

[0041] Refer to Figure 2In order to effectively prevent fluid leakage in the non-connected state, a second sealing ring 8 is provided on the outer side walls of the opposite ends of the one-way valve core 12 and the fixed valve core 22. When the plug assembly 1 and the socket assembly 2 are in the separated state, the second sealing ring 8 on the one-way valve core 12 is sealed against the inner side wall of the guide sleeve 14, and the second sealing ring 8 on the fixed valve core 22 is sealed against the inner side wall of the top stop bushing 23.

[0042] Reference Figure 1 and Figure 5 To facilitate quick disconnection of the plug body 11 and the socket body 21, a guide hole 72 is formed along the axial direction of the dust cover 7 on the side facing away from the catch ball 32. A push block 73 is slidably disposed within the guide hole 72. A guide surface is formed on the end of the stop bushing 23 near the push block 73, which mates with the inclined surface of the push block 73. A T-shaped pressing block 731 is coaxially fixedly connected to the end of the push block 73 facing outward. A compression spring 732 is sleeved on the pressing block 731, which abuts between the dust cover 7 and the pressing block 731. A protective cover 9 is fixedly mounted on the dust cover 7. The protective cover 9 is made of a relatively hard rubber material and covers the pressing block 731 and the compression spring 732 on the dust cover 7.

[0043] Reference Figures 1 to 5 , an application method of a quick-connect flat quick connector, comprising the following steps: S1: Align the connection end surface of the plug body 11 with the connection end surface of the socket body 21; S2: Push the plug body 11 into the socket body 21, so that the end surface of the guide sleeve 14 abuts against the end surface of the stop bushing 23 and overcomes the elastic force of the bushing spring 24 to enter the socket body 21; S3: Continue to push the plug body 11 toward the socket body 21 until a crisp knocking sound is heard between the locking ball 32 and the metal sheet 4. At this time, the locking ball 32 on the metal elastic ring 31 is inserted into the upper hemispherical groove 141 of the guide sleeve 14, achieving the connection and locking between the plug body 11 and the socket body 21. The flow path between the plug body 11 and the socket body 21 is opened; S4: Manually insert the locking ring 53 into the movable groove 71 and press it against the metal elastic ring sleeve 31. At this time, the locking ball 32 is pressed against the hemispherical groove 141. S5: When the plug body 11 and the socket body 21 need to be disconnected, the force of the adjustable spring 52 is overcome and the locking ring 53 is pushed out in the opposite direction. Then, the pressing block 731 is pressed through the protective cover 9, causing the inclined push block 73 to move downward along the guide hole 72 until the inclined push block 73 pushes the stop bushing 23 toward the plug body 11 via the inclined surface, until the locking ball 32 is disengaged from the hemispherical groove 141. Then, under the elastic restoring force of the bushing spring 24, the plug body 11 is quickly driven out of the plug body 11.

[0044] The implementation principle of a flat quick connector that can be quickly connected and its application method in the embodiments of this application is as follows: The plug body 11 and the socket body 21 are quickly connected and disconnected through the cooperation of the clamping ball 32 and the hemispherical groove 141. Moreover, the design of the planar fit between the one-way valve core 12 and the fixed valve core 22, as well as the design of multiple sealing rings (such as sealing ring one 6 and sealing ring two 8), ensure the smooth opening and closing of the flow channel, and ensure the tight sealing of the fluid channel in both the connected and separated states, avoiding leakage. Since the quick connector adopts a cooperation method where the valve core in the socket is fixedly arranged and the valve core in the plug is movably arranged, when the plug is pulled out, the elastic force of the bushing spring 24 acts on the stop bushing 23 and does not conflict with the elastic force of the valve core spring 13. Therefore, the wear between components can be effectively reduced during the use of the quick connector.

[0045] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A flat quick connector that can be quickly connected, characterized in that , including a plug assembly (1), a socket assembly (2) and a locking mechanism (3); the plug assembly (1) includes a plug body (11), a one-way valve core (12) slidably arranged in the plug body (11), and a valve core spring (13) abutted between the one-way valve core (12) and the inner side wall of the plug body (11); the socket assembly (2) includes a socket body (21), a fixed valve core (22) fixedly arranged in the socket body (21), a top stop bushing (23) slidably sleeved on the socket body (21), and a bushing spring (24) abutted between the top stop bushing (23) and the inner side wall of the socket body (21); the locking mechanism (3) includes a metal elastic ring sleeve (31), and a plurality of catch balls (32) arranged on the inner side wall of one end of the metal elastic ring sleeve (31) facing the plug body (11). A plurality of hemispherical grooves (141) are circumferentially distributed on the outer side wall of the end of the plug body (11) facing the socket body (21). The catch balls (32) correspond to the hemispherical grooves (141) one by one and are inserted and matched, and the one-way valve core (12) is in planar contact with the fixed valve core (22).

2. The quick-connect flat quick connector according to claim 1, characterized in that , a dust cover (7) is rotatably sleeved on the socket body (21) through a thread. The dust cover (7) covers the outer circumference of the top stop bushing (23). An activity groove (71) is formed on the inner side wall of the end of the dust cover (7) facing the top stop bushing (23). The metal elastic ring sleeve (31) is located in the activity groove (71) of the dust cover (7), and the end of the metal elastic ring sleeve (31) is coaxially fixedly arranged on the inner side wall of the activity groove (71). A plurality of notches (311) are circumferentially distributed on the side end wall of the metal elastic ring sleeve (31) facing the plug body (11). The catch balls (32) are arranged on the inner wall of the end of the metal elastic ring sleeve (31) adjacent to the notches (311).

3. The quick-connect flat quick connector according to claim 2, characterized in that , the plug assembly (1) further includes a guide sleeve (14) rotatably sleeved on the plug body (11) through a thread. The guide sleeve (14) is used to limit the one-way valve core (12) in the space surrounded by the guide sleeve (14) and the plug body (11).

4. The quick-connect flat quick coupler according to claim 3, characterized in that , a groove (142) is circumferentially arranged on the outer side wall of one end of the guide sleeve (14) facing the socket body (21). The hemispherical grooves (141) are distributed in the groove (142). A metal sheet (4) is laid in the hemispherical grooves (141) and the groove (142). The metal sheet (4) is recessed in the groove (142) to match the sizes of the hemispherical grooves (141) and the groove (142), and there is a gap between the metal sheet (4) and the hemispherical grooves (141) and the groove (142).

5. The quick-connect flat quick connector according to claim 3, characterized in that The guide sleeve (14) is provided with a locking member (5) for preventing the metal elastic ring sleeve (31) from deforming. The locking member (5) includes a fixed ring plate (51), an adjustable spring (52) and a locking ring (53). The fixed ring plate (51) is sleeved on the guide sleeve (14). The locking ring (53) and the movable groove (71) are plugged into each other. The adjustable spring (52) is connected between the fixed ring plate (51) and the locking ring (53), and multiple adjustable springs are distributed along the circumference of the guide sleeve (14). The locking ring (53) is provided with an anti-slip ridge (531) on the end wall close to the fixed ring plate (51) for easy manual dialing. When the dialing locking ring (53) is inserted into the movable groove (71), the clamping ball (32) is pressed tightly into the hemispherical groove (141).

6. The quick-connect flat quick connector according to claim 2, characterized in that The dust cover (7) is provided with a guide hole (72) along its own axial direction on the side away from the clamping ball (32), and an inclined push block (73) is slidably provided in the guide hole (72). The end of the top stop bushing (23) close to the inclined push block (73) is provided with a guide surface that fits with the inclined surface of the inclined push block (73). The end of the inclined push block (73) facing the outside is coaxially connected with a T-shaped pressing block (731), and the pressing block (731) is provided with a compression spring (732) that abuts between the dust cover (7) and the pressing block (731).

7. The quick-connect flat quick connector according to claim 6, characterized in that The dust cover (7) is provided with a protective cover (9), and the protective cover (9) is made of a rubber material with a relatively high hardness, and is used to cover the pressing block (731) and the compression spring (732) on the dust cover (7).

8. The quick-connect flat quick connector according to claim 1, characterized in that A sealing ring (6) is provided on the inner side wall of the top stop bushing (23) near the end thereof, and the sealing ring (6) is in sealing cooperation with the inner side wall of the socket body (21).

9. The quick-connect flat quick connector according to claim 1, characterized in that The one-way valve core (12) and the fixed valve core (22) are both provided with a second sealing ring (8) on the outer side wall of the opposite end. When the plug assembly (1) and the socket assembly (2) are in a separated state, the second sealing ring (8) on the one-way valve core (12) is sealed with the inner side wall of the guide sleeve (14), and the second sealing ring (8) on the fixed valve core (22) is sealed with the inner side wall of the top stop bushing (23).

10. An application method of a flat quick connector capable of quick connection according to any one of claims 1-9, characterized in that, The following steps are involved: S1: connecting end surface of the plug body (11) and the socket body (21); S2: Push the plug body (11) into the socket body (21); S3: Continue to push the plug body (11) toward the socket body (21) until a crisp knocking sound is heard between the catch ball (32) and the metal sheet (4), then stop pushing. At this time, the flow passage between the plug body (11) and the socket body (21) is opened; S4: Manually insert the locking ring (53) into the movable groove (71) to press against the metal elastic ring sleeve (31), and then the receiving ball (32) is pressed against the hemispherical groove (141); S5: When the plug body (11) and the socket body (21) need to be disconnected, the locking ring (53) is manually pushed out of the movable groove (71), and then the pressing block (731) is pressed through the protective cover (9), and the plug body (11) is quickly separated from the socket body (21).

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