TW202507185A - Quick coupler structure - Google Patents

Abstract

A quick connector structure includes: a male and a female connector connected to each other; wherein the male connector has a fixed valve core with a first spring, and a relatively movable and retractable connecting pipe is inserted into the end of the connecting pipe that is connected to the female connector, and at least one first annular groove is formed on the outer surface of the connecting pipe, and a second sealing body is sleeved to increase the sealing performance with the male connector; the connecting pipe is correspondingly abutted against a joint platform in the female connector, and the joint platform has a through hole, a movable The valve body is movably arranged relative to the through hole and can open and close the through hole. The sliding valve body is pushed back by one end of the fixed valve core to open the through hole, so that the male and female connectors are connected. The present invention changes the known method of installing the sealing body inside the tube to installing the sealing body outside the tube, which can prevent the sealing body from being turned over or pulled out by shear force when the male and female connectors are butt-jointed for assembly or disassembly, thereby improving the overall sealing performance, pressure resistance and connection reliability.

Description

Quick connector structure

The present invention relates to a quick connector structure, in particular to a quick connector structure which is convenient to process and install and has high sealing performance and connection reliability.

According to the current gas supply system or liquid cooling system, pipes and connectors are usually used to connect the modules. There is flowing gas or liquid inside the pipes. The individual module units need to be disconnected and connected frequently during use and maintenance. However, when the pipe disconnection operation is cumbersome, leakage is prone to occur, affecting the environment and system safety and stability. Therefore, it is necessary to use a quick disconnect connector (Quick Disconnect Coupler) with a quick disconnect and one-way sealing function, commonly known as a QDC quick connector. Usually, the female head of the quick connector is connected to the fixed module, and one end of the male head is connected to the hose and the other end is connected to the female plug end for connection operation, thereby realizing the connection or disconnection of the pipeline in the system. Please refer to Figure 4 for the existing male and female connection structure, which includes a one-way plug 4 and a one-way socket 5 that are plugged into each other. The one-way plug 4 has a plug housing 41, a movable valve 42, and a spring 43. The plug housing 41 is composed of a front section 411 and a rear section 412 connected together, and one end of the plug housing 41 is a plug section 413 and the other end is a male connection section 414. A plug fluid channel is provided in the plug housing 41 to accommodate the spring 43. The movable valve core 42 is assembled in the opening of the plug fluid channel corresponding to the plug section 413, and a sealing ring 44 is provided on the peripheral surface of the movable valve 42. The one-way socket 5 has a socket housing 51, a fixed valve 52, and a spring 53. The socket housing 51 is connected by a front section 511 and a rear section 512. One end of the socket housing 51 is a clamping end 513 and the other end is a male connection section 514. A socket fluid channel is provided in the socket housing 51 to accommodate the spring 53. The fixed valve core 52 is assembled in the socket fluid channel to be axially opposed to the movable valve 42. An annular gap is formed between the outer surface of the fixed valve core 52 and the inner wall of the socket housing 51. An axially movable movable sealing body 54 is provided in the annular gap. A sealing ring 55 is provided on the outer wall of the fixed valve 52 and the inner wall of the socket housing 51. and the sealing ring 56, which are used to radially seal with the movable sealing body 54. When the clamping end 513 of the socket housing 51 is inserted into the plug section 413 of the plug housing 41, the sealing ring 56 on the inner wall of the socket housing 51 is radially sealed with the outer wall of the plug housing 41, and the plug section 413 of the plug housing 41 can axially push the movable sealing ring 54 in the socket housing 51 to move toward the rear section 512, and the movable valve member 42 is pushed by the fixed valve member 52 and enters the plug fluid channel of the plug housing 41 together, thereby making the respective fluid channels of the plug 4 and the socket 5 conductive, and realizing the opening of the one-way valve. However, the above-mentioned known quick connector assembly has the following problems: 1. The sealing ring 56 is fixed on the inner wall of the socket housing 51, so it is necessary to first process the sealing ring fixing groove on the tubular inner wall of the socket housing. However, due to the limited size of the tubular opening, it is extremely difficult to process the fixing groove on the tubular inner wall, and it is difficult to measure the diameter and width of the fixing groove, which may cause the quality to be unable to be accurately controlled, or cause the risk of skewness; 2. Due to the tubular diameter, the fixing groove on the inner wall of the socket housing 51 is relatively shallow, so the sealing ring can only be shallowly positioned in the fixing groove, or the movable sealing body 54 is located in the preset annular gap between the fixed valve 52 and the socket housing 51. Therefore, during the insertion or removal of the plug housing, the sealing ring and the sealing body are easily scratched or the sealing ring and the sealing body are easily subjected to shear force and flipped, and then the sealing ring is disengaged or scratched, thereby causing failure and leakage; 3. In order to reduce the hidden dangers of the above problems caused by the insertion process of the plug housing, the existing technology usually sets the inner diameter of the sealing ring or the sealing body to be smaller. In this way, the deformation caused by the joint extrusion of the plug housing is reduced. Although the above-mentioned adverse phenomena can be reduced, the compression force is also reduced due to the reduction of the interference deformation, which makes the gas and liquid pressure resistance smaller. Usually, when the internal pressure of the pipeline is above 1.5Mpa, the leakage rate of the quick connector will increase significantly. On the other hand, the aforementioned practice of reducing the sealing ring will correspond to a smaller diameter size tolerance during the processing of the fixed groove, and the requirements for mechanical processing accuracy will definitely be greatly increased. It will undoubtedly greatly reduce the product yield and increase production costs.

In order to effectively solve the above problems, the main purpose of the present invention is to provide a quick connector structure, by setting the sealing body on the outer wall or outer surface of the attachment element for the male and female connectors to be connected, so as to avoid processing on the inner wall of the pipe (hole), greatly reduce the difficulty of processing, make installation more convenient and improve the overall assembly accuracy and quality. Another purpose of the present invention is to provide a quick connector structure, by setting the sealing body in the annular groove set on the outer wall or outer surface of the corresponding pipe body, to prevent the quick connector from being overturned, dislodged or scratched by the axial shear force when the quick connector is connected or removed, thereby improving the reliability and pressure resistance of the overall seal. To achieve the above-mentioned purpose, the present invention provides a quick connector structure, including a male connector, a female connector, and a round tube sleeve; The upper and lower ends of the male connector respectively have a male connector section and an inserting section, wherein a connecting tube that can move relative to the axial direction is inserted inside the inserting section, and a fixed valve core is provided inside the male connector, one end of the fixed valve core is fixed inside the male connector, and the other end of the fixed valve core extends and penetrates the tube body of the connecting tube, and a first sealing body is provided at the end where the fixed valve core and the connecting tube are sealed, and the two ends of a first spring are respectively supported on the fixed valve core and the inwardly contracted part of the port of the connecting tube, and at least one first annular groove is provided at the outer side of the connecting tube where it cooperates with the male connector, and at least one second sealing body is provided. The upper and lower ends of the female connector are respectively provided with a receiving section and a female connector section, and the inner part of the receiving section is provided with a joint platform, and the joint platform has a through hole, and the wall surface of the receiving section is provided with a plurality of holes, and at least one steel ball is provided respectively. The inner part of the female connector is provided with a movable valve body and a second spring, and the movable valve body can be relatively reciprocated in the axial direction inside the female connector to open or close the aforementioned The through hole is formed in the middle of the movable valve body, one end of the second spring pushes against one side of the movable valve body to keep the movable valve body and the through hole in a normally closed state, one end of the fixed valve core presses the movable valve body to withdraw from the originally closed through hole to connect the male and female connectors to each other, a third spring is sleeved on the outside of the receiving section of the female connector, the male connector is plugged into the receiving section of the female connector through the plug-in section, and the male connector is radially clamped by the steel balls to prevent it from coming off. The two ends of the circular tube sliding sleeve are open and slidably sleeved on the outside of the female joint and the third spring. The two ends of the third spring respectively support the protrusions on the inner wall of the circular tube sliding sleeve and the protrusions on the outer surface of the female joint, and keep the circular tube sliding sleeve on the outer side of the receiving section of the female joint. The present invention changes the sealing ring which is usually arranged on the inner wall of the tube body (or screw hole) of the male and female connectors to be arranged on the outer tube wall at the relative sliding fit position of the tube body components. In this way, processing on the outer wall of the tube body is more convenient and simpler than processing in the hole of the tube body, and the precision control is more accurate. The sealing ring is changed to be arranged in the annular groove outside the tube body, and the annular groove provides positioning and fixation for the sealing ring. When the male and female connector components are relatively plugged in and slide fit with each other, the sealing ring can be prevented from turning over or falling out or being scratched due to the shear force generated by the reciprocating motion, thereby improving the overall sealing performance.

The above-mentioned purpose of the present invention and its structural and functional characteristics will be explained according to the embodiments of the attached drawings. Please refer to Figures 1A, 1B, 2A, 2B, and 3. As shown in the figures, the present invention is a quick connector structure, which includes a male connector 1 and a female connector 2. Referring to Figures 1A and 1B, the male connector 1 includes: a male upper shell 11, a male lower shell 12, a connecting tube 13, a first spring 14, and a fixed valve core 15. The upper end of the male upper shell 11 has a male connecting section 11a and a plurality of external threads on the outside, which can be screwed together with the internal threads provided in other gas and liquid pipelines (not shown in the figure) for assembly. The lower end of the male upper shell 11 has a male screw hole 11b, the male screw hole 11b has a plurality of internal threads, the male screw hole 11b has a bottom surface 11c near the bottom thereof, and an inner annular groove 11d is formed on the screw hole wall surface of the male screw hole 11b adjacent to the bottom surface 11c. The upper end of the male lower shell 12 has a plurality of external threads on the outside, and the upper end of the male lower shell 12 has a countersunk hole 122 on the inside. The lower end of the male lower shell 12 has an insertion section 121, and the inner side of the end of the insertion section 121 has a retracted hole 121a, and the outer surface of the insertion section 121 has an arc-shaped groove 123. The male upper shell 11 is screwed together with the outer thread of the upper end of the male lower shell 12 through the inner thread in the male screw hole 11b. The upper and lower ends of the connecting tube 13 respectively have a receiving end 131 and a plug end 132, and the two are connected to each other. The connecting tube 13 has a first section 13a and a second section 13b, and the outer diameters of the two sections are different, so a first step 136 is formed at the connection between the two sections. The outer tube wall 13aa of the first section 13a of the connecting tube 13 is provided with at least one first annular groove 133, and a second sealing body 134 is embedded in the first annular groove 133. The end of the plug end 132 located at the lower end of the connecting tube 13 gradually tapers inwardly toward the center of the connecting tube 13 to form a first constriction portion 135 and has a first through hole 135a. The receiving end 131 of the connecting tube 13 is connected to the plug section 121 corresponding to the retracted hole 121a of the plug section 121 of the male connector lower shell 12, and the outer tube wall 13aa of the first section 13a of the connecting tube 13 is in relative sliding fit with the inner tube wall 12a of the male connector lower shell 12, that is, the connecting tube 13 can be retracted into the interior of the male connector lower shell 12 or extended outward to perform reciprocating motion. Since the outer diameter of the first section 13a of the connecting tube 13 is smaller than the inner diameter of the male lower shell 12, the two are configured to be non-tightly matched and can perform relative reciprocating motion. In order to provide a sealing effect when the two reciprocate, the second sealing body 134 embedded in the first annular groove 133 of the first section 13a fills or seals the radial gap between the two, thereby providing sealing during axial relative motion. Since the outer diameter of the first section 13a of the connecting tube 13 is larger than the diameter of the retracted hole 121a of the plug-in section 121 of the male lower shell 12, and the outer diameter of the second section 13b is smaller than the diameter of the retracted hole 121a of the plug-in section 121 of the male lower shell 12, when the first and second sections 13a, 13b of the connecting tube 13 are slidably engaged with the male lower shell 12 relative to each other, the first step 136 of the connecting tube 13 is clamped at the retracted hole 121a to form a limit, thereby preventing the connecting tube 13 from escaping from the male lower shell 12 during reciprocating extension and contraction activities. As shown in Figures 1A and 1B, the fixed valve core 15 has a valve core base 151, a valve core stem 152 and a valve core head 153. The valve core base 151 has a top side 151a and a bottom side 151b. The valve core stem 152 has the valve core base 151 and the valve core head 153 at two ends thereof, respectively. The diameter of the valve core head 153 is larger than the diameter of the valve core stem 152 but smaller than the inner diameter of the first through hole 135a, and the radial outer surface of the valve core head 153 is provided with at least one annular groove 1531, and a first sealing body 1532 is sleeved in the annular groove 1531. In addition, the valve core rod body 152 is sleeved with a first spring 14. The valve core rod body 152 and the first spring 14 are inserted into the inner part of the male connector lower shell 12 from the upper end of the male connector lower shell 12, and the bottom side 151b of the valve core base 151 is clamped on the bottom of the countersunk hole 122 of the male connector lower shell 12. A sealing body 3 is placed in the annular groove 11d in the male screw hole 11b of the male upper shell 11. The male upper and lower shells 11 and 12 are screwed together through internal and external threads. The top side 151a of the valve core base 151 of the fixed valve core 15 abuts against the bottom surface 11c of the male screw hole 11b, and the bottom side 151b of the valve core base 151 is clamped on the bottom of the countersunk hole 122 of the male lower shell 12. The valve core base 151 is clamped between the male upper and lower shells 11 and 12, and the fixed valve core 15 is fixed and positioned after the two are combined. The sealing body 3 also provides sealing between the male upper and lower shells 11 and 12. The outer part of the valve core head 153 and the inner wall surface of the first through hole 135a of the connecting tube 13 must slide back and forth relative to each other (open or close), so the configuration between the two is not a tight fit. Therefore, in the normally closed state, the first sealing body 1532 can be used to fill the micro gap between the two, so as to provide the valve core head 153 and the first through hole 135a of the connecting tube 13 with sealing in the normally closed state. The valve core base 151 is provided with a plurality of notches 154 arranged at equal or unequal intervals, and the notches 154 can be used as channels for fluid to pass through. As shown in the assembly state of FIG. 1B, the fixed valve core 15 and a first spring 14 are accommodated in the male connector 1 together, and the first spring 14 is sleeved on the outside of the valve core rod 152 of the fixed valve core 15. One end of the first spring 14 is supported on the bottom side 151b of the valve core base 151 of the fixed valve core 15, and the other end is pressed against the inner side surface 135b of the first constriction portion 135 of the connecting pipe 13 near the first through hole 135a. Please refer to FIGS. 2A and 2B, the female connector 2 includes: a female upper shell 21, a female lower shell 22, a second spring 23, a movable valve body 24 and a round tube sliding sleeve 25. The upper end of the female upper shell 21 has a receiving section 211, and the lower end has a screw section 212. The outer part of the screw section 212 has a plurality of external threads. The inner side wall of the receiving section 211 of the female upper shell 21 protrudes toward the center with a joining platform 2111, and the upper side end surface 2111a of the joining platform 2111 has a sealing body accommodating groove 2112, and a third sealing body 3113 is arranged therein. The joining platform 2112 has a through hole 2114 near the center and penetrates the joining platform 2111 . The wall surface of the receiving section 211 of the female upper shell 21 has a plurality of through holes 2115, and a steel ball 2116 is respectively disposed in the through holes 2115. The steel ball 2116 can move inward or outward in the radial direction of the female upper shell 21 in the through holes 2115, and the outer diameter of the receiving section 211 of the female upper shell 21 is larger than the outer diameter of the screw section 212 of the female upper shell 21, and a second step 2117 is formed at the connection between the two. The lower end of the female lower shell 22 has a female connecting section 221, and the outer surface of the female connecting section 221 is provided with a plurality of external threads, the upper end of the female lower shell 22 has a female screw hole 22a, the inner wall of the female screw hole 22a has a plurality of internal threads, and the bottom of the female screw hole 22a has a bottom surface 22b, and the wall surface of the female screw hole 22a near the bottom surface 22b of the female screw hole 22a is not provided with an internal thread to form an annular groove 2211, and a sealing body 3 is provided inside the annular groove 2211. The upper third of the female lower shell 22 has a third step 22c. The female upper shell 21 and the female lower shell 22 are assembled by screwing the inner and outer threads together, and the sealing body 3 provides sealing between the female upper shell 21 and the female lower shell 22. After the female upper shell 21 and the female lower shell 22 are assembled together, a valve movable space 22d is formed between the joint platform 2111 and the bottom surface 22b. The movable valve 24 has a valve base 241 and a valve head 242. The valve head 242 is formed by extending upward from the upper side of the valve base 241. The valve base 241 has at least one or more notches 243 arranged at equal or unequal intervals, and the notches 243 can be used as channels for fluid to pass through. The outer diameter of the valve head 242 is smaller than the outer diameter of the valve base 241, and the outer diameter of the valve head 242 is smaller than the diameter of the through hole 2114. The valve head 242 is movably slidably fitted relative to the through hole 2114, and can open or close the through hole 2114 accordingly. In order to further increase the sealing between the valve head 242 and the through hole 2114, at least one groove 2421 is provided on the outer edge surface of the valve head 242, and a fourth sealing body 2422 can be provided in the groove 2421, so that the fourth sealing body 2422 fills the micro gap between the valve head 242 and the through hole 2114 of the joint platform 2111 to achieve a sealing effect. The second spring 23 has an upper end 231 and a lower end 232. The second spring 23 and the movable valve body 24 are arranged in the valve body movable space 22d, and the upper end 231 of the second spring 23 is supported on the other side of the valve body base 241 opposite to the valve body head 242, and the lower end 232 of the second spring 23 is pressed against the bottom surface 22b, and the second spring 23 pushes the movable valve body 24 upward, so that the movable valve body 24 and the through hole 2114 at the center of the joint platform 2111 remain in a normally closed state. The circular tube sliding sleeve 25 has an upper section 251 and a lower section 252. The inner wall surface between the upper and lower sections 251 and 252 has a limiting portion 253. The inner surface of the upper section 251 of the circular tube sliding sleeve 25 gradually contracts from top to bottom to form a cone 254. The outer portion of the female upper shell 21 is sleeved with a third spring 26, and the lower section 252 of the circular tube sliding sleeve 25 is sleeved on the outer portion of the third spring 26. The upper end 261 of the third spring 26 supports the lower side of the limiting portion 253 of the circular tube sliding sleeve 25, and the lower end 262 of the third spring 26 presses against an end surface 22e at the upper end of the female lower shell 22. The limiting portion 253 of the circular tube sliding sleeve 25 is a spring 26. The upper side surface 253a abuts against the second step 2117 of the female upper shell 21, so that the circular tube sliding sleeve 25 can be prevented from being separated from the outside of the female upper shell 21 when it moves upward along the outer axial direction of the female upper shell 21. When the lowermost edge of the lower end of the circular tube sliding sleeve 25 slides downward, it will be limited by the third step 22c to prevent the circular tube sliding sleeve 25 from being separated from the female lower shell 22 downward. The third spring 26 supports the limiting portion 253 of the circular tube sliding sleeve 25 and pushes the circular tube sliding sleeve 25 upward, and the conical surface 254 disposed inside the upper section 251 of the circular tube sliding sleeve 25 pushes the steel balls 2116 disposed in the plurality of through holes 2115 of the receiving section 211 of the female upper shell 21 toward the inside of the female upper shell 21, and the third spring 26 continues to support the circular tube sliding sleeve 25, so that the conical surface 254 of the circular tube sliding sleeve 25 keeps locking the steel balls 2116. When the male connector 1 and the female connector 2 are to be quickly connected, the circular tube sleeve 25 on the outer side of the female connector upper shell 21 is first pulled downward to release the locking state of the conical surface 254 of the circular tube sleeve 25 on the steel balls 2116, and then the front end face of the plug end 132 of the connecting tube 13 of the male connector 1 abuts against the third sealing body 2113 provided at the connection platform 2111 of the female connector 2, and the third sealing body 2113 first provides a preliminary seal for the two, and at the same time, the valve core head 153 and the valve body head 242 of the movable valve body 24 are also abutted against each other. The external force is continuously applied to connect the male connector 1 with the female connector 2. As the male connector 1 and the female connector 2 continue to approach each other, the connecting tube 13 is subjected to the thrust in the axial direction, and the first spring 14 inside is also compressed by the axial force at the same time, so the connecting tube 13 is pressed in the reverse direction and retracted into the interior of the male connector lower shell 12. When the connecting tube 13 is retracted into the interior of the male lower shell 12, and the plug-in section 121 of the male lower shell 12 of the male connector 1 is plugged into the receiving section 211 of the female upper shell 21 of the female connector 2, the steel balls 2116 provided on the receiving section 211 correspond to the arc-shaped grooves 123 provided on the outside of the plug-in section 121, so that the male and female connectors 1 and 2 are locked in a plug-in manner. After the aforementioned circular tube sliding sleeve 25 is loosened and the lower side of the limiting portion 253 of the circular tube sliding sleeve 25 is supported by the third spring 26, the circular tube sliding sleeve 25 is pushed upward until it is reset, and the conical surface 254 presses the steel balls 241 inward to lock them, thereby ensuring that the male and female connectors 1, 2 will not be loosened due to excessive internal transmission fluid pressure. Please refer to Figure 3 and refer to Figures 1A to 2B. As shown in the figure, when the outer tubes of the male and female connectors 1 and 2 are connected, the connecting tube 13 is retracted into the male connector 1. The valve core head 153 of the fixed valve core 15 inside the male connector 1 will also gradually extend from the first through hole 135a of the connecting tube 13 due to the action of the male connector 1 and the female connector 2 being connected, and continue to extend toward the connecting tube 13. The movable valve body 24 is pushed in the direction of the valve head 242, and at the same time, the second spring 22 pushed on one side of the movable valve body 24 is compressed, and the movable valve body 23 is withdrawn from the original position of blocking and closing the through hole 213b at the center of the joint platform 213, so that the through hole 213b is unobstructed and allows the fluid to pass through the through hole 213b, so that the male and female connectors 1 and 2 complete the docking operation. The main purpose of this case is to improve the processing difficulty derived from the traditional quick connector setting the sealing ring in the inner wall of the tube or the screw hole, and the shear force generated along the axial direction when the male and female connectors are assembled or pulled out, causing the sealing ring to be turned over or pulled out together, or causing scratches and other defects on the sealing ring. Therefore, this case changes the space (ring groove) where the sealing body is originally set from the inner wall surface of the screw hole or the round tube to the outer tube wall at the relative sliding fit position of the tube body component. Processing on the outer wall of the tube is more convenient and simpler than processing inside the hole of the tube as known, and the precision control is more accurate. The sealing ring is changed to be set in the annular groove outside the tube, and the annular groove provides positioning and fixation for the sealing ring. When the male and female connector components are inserted and slidably matched with each other, the sealing rings will not be turned over or pulled out of the original position due to the shear force, thereby improving the various defects of the known art. The above has been described in detail, but the above is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equal changes and modifications made according to the scope of application of the present invention should still fall within the scope of the patent.

1: Male connector 11: Male upper shell 11a: Male connection section 11b: Male screw hole 11c: Bottom surface 11d: Inner ring groove 12: Male lower shell 121: Plug section 121a: Reduction hole 122: Countersunk hole 123: Arc groove 13: Connecting tube 13a: First section 13aa: External tube wall 13b: Second section 131: Receiving end 132: Plug end 133: First ring groove 134: Second sealing body 135: First reduction section 135a: First through hole 135b: Inner side surface 136: First step 14: First spring 15: Fixed valve core 151: Valve core base 151a: Top side 151b: Bottom side 152: Valve core rod body 153: Valve core head 1531: Ring groove 1532: First sealing body 154: Notch 2: Female connector 21: Female upper shell 211: Receiving section 2111: Joint platform 2111a: End face 2112: Sealing body accommodating groove 2113: Third sealing body 2114, 213b: Through hole 2115: Perforation 2116: Steel ball 2117: Second stage 212: Screw lock section 22: Female lower shell 221: Female connector section 22a: Female screw hole 22b: Bottom surface 22c: Third stage 22e: End surface 2211: Annular groove 23: Second spring 231: Upper end 232: Lower end 24: Movable valve body 241: Valve body base 242: Valve body head 243: Notch 2421: Groove 2422: Fourth sealing body 25: Circular tube sleeve 251: Upper section 252: Lower section 253: Limiting part 253a: Upper side surface 254: Conical surface 26: Third spring 261: Upper end 262: Lower end 3: Sealing body

Figure 1A is an exploded view of the male connector of the quick connector structure of the present invention; Figure 1B is a cross-sectional view of the male connector assembly of the quick connector structure of the present invention; Figure 2A is an exploded view of the female connector of the quick connector structure of the present invention; Figure 2B is a cross-sectional view of the female connector assembly of the quick connector structure of the present invention; Figure 3 is a cross-sectional view of the assembly of the quick connector structure of the present invention; Figure 4 is a cross-sectional view of a known assembly.

1:Male connector

11: Male head shell

12: Male head shell down

13: Connecting pipe

14: First spring

15: Fixed valve core

151: Valve core base

152: Valve stem body

153: Valve core head

1532: First sealing body

2: Female connector

21: Female connector housing

2111:Jointing platform

2113: The third sealing body

2114:Through hole

2115:Piercing

2116:Steel Ball

22: Female connector lower shell

23: Second spring

24: Movable valve body

241: Valve body base

242: Valve head

2422: The fourth sealed body

25: Round tube sleeve

26: Third spring

3: Sealing body

Claims (9)

A quick connector structure has: A male connector, having a male upper shell, a male lower shell, a connecting tube and a fixed valve core, the male upper shell and the male lower shell are mutually engaged, the connecting tube is slidably inserted into the lower end of the male lower shell, the outer surface of the connecting tube is provided with at least one first annular groove and is sleeved with a second sealing body, the fixed valve core is sleeved with a first spring, one end of the fixed valve core is fixed inside the male connector, and the other end extends into the connecting tube; A female connector, comprising a female upper shell, a female lower shell and a round tube sleeve, the female upper and lower shells are connected to each other and define a valve body movable space together, a third spring is sleeved on the outside of the female connector upper shell, the round tube sleeve is slidably sleeved on the outside of the female connector upper shell and the third spring, the female connector upper shell has a joint platform inside, the joint platform is provided with a through hole and a sealing body accommodating groove, a third sealing body is arranged in the sealing body accommodating groove, a movable valve body and a second spring are arranged in the valve body movable space, the upper end of the second spring pushes the movable valve body upward to seal the through hole of the aforementioned joint platform; After the male and female joints are engaged, the connecting tube is compressed and retracted into the interior of the male joint, so that the end of the fixed valve core extending into the connecting tube can extend out of the connecting tube and dock with the movable valve body, and push the movable valve body to move in the direction opposite to the engagement platform, so that the through hole originally sealed by the movable valve body is opened, so that the interior of the male and female joints remains unobstructed. A quick connector structure as described in claim 1, wherein the male connector has a male connecting section and an inserting section, the male connecting section is arranged at the upper end of the male upper shell, and the inserting section is arranged at the lower end of the male lower shell, the outer part of the male upper shell is provided with a plurality of external threads, the inner wall surface of the male upper shell is provided with a plurality of internal threads, and the outer part of the upper end of the male lower shell is provided with a plurality of external threads; the male upper shell is screwed together with the external threads arranged on the outer part of the male lower shell through the internal threads. A quick connector structure as described in claim 1, wherein the female connecting section is arranged at the lower end of the female lower shell and has a plurality of external threads on the external surface, and the receiving section is arranged at the upper end of the female upper shell, the lower end of the female upper shell has a screw section and has a plurality of external threads on the outside . A quick connector structure as described in claim 1, wherein the movable valve body has a valve body base and a valve body head, the valve body head is formed by extending upward from one side of the valve body base, the valve body base has at least one or more notches arranged at equal or unequal intervals, the outer edge surface of the valve body head is provided with at least one groove, and a fourth sealing body is arranged in the groove. A quick connector structure as described in claim 1, wherein the third spring is sleeved on the outside of the upper shell of the female shell, and the lower section of the circular tube sleeve is sleeved on the outside of the third spring, the upper end of the third spring presses against the lower side of the limiting portion of the circular tube sleeve, the lower end of the third spring presses against an end surface at the upper end of the female lower shell, and an upper side surface of the limiting portion of the circular tube sleeve presses against the second step of the female upper shell, so that the circular tube sleeve can be reciprocated upward or downward relative to the external axial direction of the female upper shell to prevent the circular tube sleeve from detaching from the outside of the female upper shell. A quick connector structure as described in claim 1, wherein the circular tube sleeve has an upper section and a lower section with both ends being open, the inner wall surface between the upper and lower sections has a limiting portion, the inner surface of the upper section of the circular tube sleeve has a tapered surface, and the upper and lower ends of the third spring respectively support the limiting portion of the circular tube sleeve and the protrusion on the outer surface of the female connector. As described in claim 1, the quick connector structure, wherein the upper and lower ends of the connecting tube respectively have a receiving end and a plug-in end, the receiving end of the connecting tube is plugged into the plug-in section and can move axially relative to the plug-in section, and the first contraction portion has a first through hole. A quick connector structure as described in claim 1, wherein the fixed valve core has a valve core base, a valve core rod body extends from one side of the valve core base, the end of the valve core rod body has a valve core head, the outer surface of the valve core head is provided with at least one annular groove and is sleeved with a first sealing body, the upper end of the first spring supports the fixed valve core, and the lower end thereof presses against the inside of the first constriction portion of the connecting tube. A quick connector structure as described in claim 1, wherein the upper and lower ends of the female connector respectively have a receiving section and a female connecting section, the wall of the receiving section is provided with a plurality of holes and is respectively provided with at least one steel ball, the bottom of the inner side of the female connecting section has a bottom surface, a movable valve body space is provided between the lower side of the joint platform and the bottom surface, the movable valve body has a valve body base and a valve body head, the valve body base is provided with a plurality of notches, the upper end of the second spring pushes the movable valve body upward, and the lower end thereof presses the bottom surface downward, so that the movable valve body seals the through hole.

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