CN220396853U - Quick connector structure - Google Patents

Abstract

The utility model provides a quick joint structure, comprising: a male and female connector for mating; the male connector is internally provided with a fixed valve core provided with a first spring, one end which is in butt joint with the female connector is inserted with a connecting pipe which can relatively move and stretch, the outer surface of the connecting pipe is provided with at least one first annular groove, and a sealing body is sleeved on the outer surface of the connecting pipe to increase the tightness with the male connector; the utility model changes the prior pipe inner plug into pipe outer sleeve with the sealing body, which can prevent the sealing body from being overturned or pulled out to separate under shearing force when the male and female connectors are assembled or disassembled, thereby improving the integral sealing property, pressure resistance and connection reliability.

Description

Quick connector structure

Technical field

The utility model relates to a joint structure, in particular to a quick joint structure that is convenient for processing and installation and has high sealing performance and connection reliability.

Background technique

In the current gas supply system or liquid cooling system, pipelines and joints are usually used to connect each unit module. There is flowing gas or liquid inside the pipeline, and each module unit needs to be frequently disconnected during use and maintenance. and joining operations, but when the pipeline disconnection operation is more cumbersome, leakage may easily occur, affecting the environment and system safety and stability. Therefore, it is necessary to use a quick disconnect connector (Quick Disconnect Coupler) with quick disconnect and one-way sealing functions. ), commonly known as QDC quick connector. Usually the female end of the quick connector is connected to the fixed module, and one end of the male end is connected to the hose and the other end is connected to the plug end of the female end to connect or disconnect the pipelines 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, Spring 43. The plug housing 41 is composed of a front section 411 and a rear section 412. One end of the plug housing 41 is a plug-in section 413 and the other end is a male connection section 414. There is a spring 41 in the plug housing 41. The plug fluid channel can accommodate the spring 43 , the movable valve core member 42 is assembled in the opening of the plug fluid channel corresponding to the plug-in section 413 , and a sealing ring 44 is provided on the peripheral surface of the movable valve member 42 . The one-way socket 5 has a socket shell 51, a fixed valve 52, and a spring 53. The socket shell 51 is composed of a front section 511 and a rear section 512, and one end of the socket shell 51 is a snap end 513 and the other end. One end is a male connecting section 514, and a socket fluid channel is provided in the socket housing 51 to accommodate the spring 53. The fixed valve core component 52 is assembled in the socket fluid channel to be axially connected to the movable valve component 42. offset each other, and an annular gap is formed between the outer surface of the fixed valve core member 52 and the inner wall of the socket housing 51. An axially movable sealing body 54 is provided in the annular gap, and is disposed on the fixed valve member. A sealing ring 55 and a sealing ring 56 are respectively provided on the outer wall surface of the socket housing 52 and the inner wall of the socket housing 51 for radially sealing cooperation with the movable sealing body 54 . When the clamping end 513 of the socket housing 51 is inserted into the plug-in section 413 of the plug housing 41, the sealing ring 56 on the inner wall of the socket housing 51 is used to radially seal with the outer wall of the plug housing 41, and the plug The plug-in section 413 of the housing 41 can axially push the movable sealing ring 54 in the socket housing 51 toward the rear section 512, and the movable valve member 42 is pushed against the fixed valve member 52 and enters the plug together. In the plug fluid channel of the housing 41, the respective fluid channels of the plug 4 and the socket 5 are connected, thereby realizing the opening of the one-way valve. However, the above existing quick connector assembly has the following problems:

1. The sealing ring 56 is fixed on the inner wall of the socket housing 51. Therefore, the sealing ring fixing groove must be formed on the tubular inner wall of the socket housing first. However, due to the limited diameter of the tubular diameter, it is not necessary to process the fixing groove recessed on the tubular inner wall. The installation is extremely difficult, and it is difficult to measure the diameter and width of the fixed groove, which may easily lead to the failure of precise quality control or the risk of skew;

2. Due to the tubular diameter, the fixed groove on the inner wall of the socket housing 51 is shallow, so the sealing ring can only be positioned shallowly in the fixed groove, or the movable sealing body 54 is pre-positioned between the fixed valve 52 and the socket housing 51. Therefore, during the insertion or extraction process of the plug housing, the sealing ring and sealing body are easily scratched or the sealing ring and sealing body are easily subjected to shear force and flipped over, resulting in the sealing ring coming out. Or scratched and damaged, resulting in failure and leakage;

3. In the existing technology, in order to alleviate the above-mentioned problems caused by the plug housing insertion process, the sealing ring or the inner diameter of the seal is usually set to be smaller. In this way, the amount of extrusion and deformation by the plug housing is reduced. Although it can reduce the occurrence of the above-mentioned adverse phenomena, due to the reduced interference deformation, its pressing force also becomes smaller simultaneously, making its resistance to gas and hydraulic pressure smaller. Usually, when the internal pressure of the pipeline is above 1.5Mpa, the quick joint leaks when operating under pressure. rate will increase significantly. On the other hand, the aforementioned method of reducing the sealing ring corresponds to a smaller diameter tolerance when processing the fixed groove, and the requirements for machining accuracy must be greatly improved. It will undoubtedly significantly reduce product yield and increase production costs.

Utility model content

In order to effectively solve the above problems, the main purpose of the present utility model is to provide a quick connector structure, by arranging the sealing body on the outer wall or outer surface of the attachment element of the male and female joints for butt joints, thereby avoiding the pipe (Hole) inner wall processing greatly reduces the difficulty of processing, makes installation more convenient and improves the overall assembly accuracy and quality.

Another object of the present invention is to provide a quick connector structure. The plurality of sealing bodies are sleeved in annular grooves provided on the outer wall or outer surface of the corresponding pipe body to prevent the sealing body from being damaged when the quick connector is docked or removed. The axial shear force may cause problems such as flipping, protrusion or scratching, thereby improving the reliability and pressure resistance of the overall seal.

In order to achieve the above purpose, the utility model provides a quick connector structure, which is characterized by:

A male joint has a male upper shell, a male lower shell, a connecting pipe and a fixed valve core. The male upper shell and the male lower shell are engaged with each other, and the connecting pipe is slidably inserted in the At the lower end of the lower shell of the male head, the outer surface of the connecting pipe is provided with at least a first annular groove. The first annular groove is provided with a second sealing body. The fixed valve core is sleeved with a first spring. One end is fixed inside the male connector, and the other end extends into the connecting pipe;

A female joint has a female upper shell, a female lower shell and a round tube sliding sleeve. The female upper shell and the lower shell are joined to each other and jointly define a valve body activity space. The outer sleeve of the female joint upper shell is There is a third spring, and the circular tube sliding sleeve is slidably connected to the outside of the female head housing and the third spring. The inside of the female head housing has a joint platform, and the joint platform is provided with a through hole and a The sealing body accommodating groove is provided with a third sealing body in the sealing body accommodating groove. The valve body activity space is provided with a movable movable valve body and a second spring. The upper end of the second spring pushes up the A movable valve body, so that the movable valve body seals the through hole of the aforementioned joint platform;

After the male joint and the female joint are joined, the connecting pipe is compressed and retracts inwardly into the inside of the male joint, so that one end of the fixed valve core extending into the connecting pipe can extend out of the connecting pipe and dock with the movable valve body. And push the movable valve body to move in the direction opposite to the joint platform, so that the through hole originally sealed by the movable valve body is opened, so that the inside of the male and female joints can be kept clear.

Described quick connector structure, wherein: the male connector has a male connection section and a plug-in section, the male connection section is provided at the upper end of the male housing, and the plug-in section is provided under the male head The lower end of the shell, the male head shell is provided with a plurality of external threads on the outside, the internal wall of the male head shell is provided with a plurality of internal threads, the upper end of the male head lower shell is provided with a plurality of external threads on the outside; the male head The upper shell is screw-locked with each other through the plurality of internal threads and the external threads provided on the outside of the male lower shell.

The quick connector structure, wherein: the female connection section is provided at the lower end of the female lower shell, and the outer surface is provided with a plurality of external threads, and the upper end of the female shell is provided with a receiving section, the The lower end of the female housing has a screw locking section, and the screw locking section has a plurality of external threads on the outside.

The quick connector structure, 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. There is a valve body base on the valve body. or a plurality of notches arranged at equidistant 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 provided in the groove.

Described quick connector structure, wherein: the third spring is sleeved on the outside of the female head housing, the lower section of the circular tube sliding sleeve is sleeved on the outside of the third spring, and the upper end of the third spring top Support the lower side of the limiting portion of the circular tube sliding sleeve, the lower end of the third spring presses against an end surface at the upper end of the lower shell of the female head, and the upper side of the limiting portion of the circular tube sliding sleeve presses against the female head. The second step part of the head housing allows the round tube sliding sleeve to reciprocate upward or downward along the outer axial direction of the female head housing to prevent the round tube sliding sleeve from being separated from the outside of the female head housing. .

Described quick connector structure, wherein: the circular tube sliding sleeve has an upper section and a lower section and both ends are open, and the inner wall surface between the upper section and the lower section has a limiting portion, so The inner surface of the upper section of the circular tube sliding sleeve has a tapered surface, and the upper and lower ends of the third spring are respectively supported on the limiting portion of the circular tube sliding sleeve and the protrusion on the outer surface of the female joint.

Described quick connector structure, wherein: the lower end of the male lower shell has a plug-in section, the upper and lower ends of the connecting pipe have a receiving end and a plug-in end respectively, and the receiving end of the connecting pipe It is plugged into the plug-in section and can move axially relative to the plug-in section. The end of the plug-in end of the lower end of the connecting pipe tapers inward toward the center of the connecting pipe to form a first constriction. A constricted mouth portion has a first through hole.

The quick connector structure, wherein: the fixed valve core has a valve core base, a valve core shaft portion extends from one side of the valve core base, and the end of the valve core shaft portion has a valve core head, and the valve core The outer surface of the core head is provided with at least one annular groove. The annular groove is equipped with a first sealing body. The upper end of the first spring supports the fixed valve core and the lower end presses against the first constriction of the connecting pipe. internal.

The quick connector structure, wherein: the upper and lower ends of the female connector have a receiving section and a female connecting section respectively, 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 bottom of the female screw hole has a bottom surface, and the movable valve body 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 A plurality of notches are provided, the upper end of the second spring pushes up the movable valve body, and the lower end presses down the bottom surface, so that the movable valve body seals the through hole.

The utility model changes the sealing ring currently provided on the inner wall surface of the pipe body (or screw hole) of the male and female joints to be provided on the outer pipe wall at the relative sliding fitting position of the pipe body components, so that the pipe body Processing the outer wall surface is more convenient and simpler than the existing processing in the hole of the pipe body, and the accuracy control is more precise. The sealing ring is set in the annular groove outside the pipe body. An annular groove provides positioning and fixation of the sealing ring, and when the male and female joint components are relatively plugged into each other and slide with each other, it can prevent the sealing ring from being overturned or the sealing ring coming out or scraping due to the shear force generated by the reciprocating motion. problems such as damage, thereby improving the overall sealing performance.

Description of the drawings

Figure 1A is an exploded view of the male connector of the quick connector structure of the present invention;

Figure 1B is a combined cross-sectional view of the male joint of the quick joint structure of the present invention;

Figure 2A is an exploded view of the female joint of the quick joint structure of the present invention;

Figure 2B is a combined cross-sectional view of the female joint of the quick joint structure of the present invention;

Figure 3 is a combined cross-sectional view of the quick connector structure of the present invention;

Figure 4 is a combined sectional view of the prior art.

Explanation of reference numerals: male connector 1; male upper shell 11; male connecting section 11a; male screw hole 11b; bottom surface 11c; inner ring groove 11d; male lower shell 12; plug-in section 121; inner shrink hole 121a ; Countersunk hole 122; arc-shaped groove 123; connecting pipe 13; first section 13a; external pipe wall 13aa; second section 13b; receiving end 131; plug-in end 132; first ring groove 133; Two sealing bodies 134; first constriction portion 135; first through hole 135a; inner surface 135b; first step portion 136; first spring 14; fixed valve core 15; valve core base 151; top side 151a; bottom side 151b ; Valve core stem part 152; Valve core head 153; Ring groove 1531; First sealing body 1532; Notch 154; Female connector 2; Female head shell 21; Receiver section 211; Joint platform 2111; End face 2111a; Seal Body receiving groove 2112; third sealing body 2113; through holes 2114, 213b; through holes 2115; steel balls 2116; second stage 2117; screw lock section 212; female lower shell 22; female connecting section 221; female nut Hole 22a; bottom surface 22b; third step portion 22c; end surface 22e; annular groove 2211; second spring 23; upper end 231; lower end 232; movable valve body 24; valve body base 241; valve body head 242; notch 243 ; Groove 2421; Fourth sealing body 2422; Round tube sliding sleeve 25; Upper section 251; Lower section 252; Limiting portion 253; Upper side 253a; Conical surface 254; Third spring 26; Upper end 261; Lower end 262 ;Sealing body 3.

Detailed ways

The above objects and structural and functional characteristics of the present invention will be explained based on the embodiments of the accompanying drawings.

Please refer to Figure 1A, Figure 1B, Figure 2A, Figure 2B, and Figure 3. As shown in the figure, the utility model provides a quick connector structure, which includes a male connector 1 and a female connector 2 .

Referring to FIGS. 1A and 1B , the male joint 1 includes: a male upper shell 11 , a male lower shell 12 , a connecting pipe 13 , a first spring 14 and a fixed valve core 15 .

The upper end of the male housing 11 has a male connecting section 11a and is provided with a plurality of external threads. The external threads can be screwed together with the internal threads provided in other gas and liquid pipelines (not shown in the figure). Perform group connection.

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 its bottom. The male screw hole 11b has a bottom surface 11c. An inner annular groove 11d is formed on the wall surface of the screw hole 11b adjacent to the bottom surface 11c.

The upper end of the male lower shell 12 is provided with a plurality of external threads on the outside, and the upper end of the male lower shell 12 is provided with a countersunk hole 122 on the inside. The lower end of the male lower shell 12 has a plug-in section 121 , and the plug-in section 121 has an inner shrink hole 121 a at its end, and the outer surface of the plug-in section 121 has an arcuate groove 123 .

The male upper shell 11 is assembled and assembled by threading the internal thread in the male screw hole 11b and the external thread at the upper end of the male lower shell 12 to each other.

The upper and lower ends of the connecting pipe 13 have a receiving end 131 and a plug-in end 132 respectively, and the two ends penetrate each other. The connecting pipe 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 point between the two sections.

The outer wall 13aa of the first section 13a of the connecting pipe 13 is provided with at least a first annular groove 133. The first annular groove 133 is embedded with a second sealing body 134, and an insert at the lower end of the connecting pipe 13 The end of the connecting end 132 is tapered inward toward the center of the connecting pipe 13 to form a first constriction 135 and has a first through hole 135a.

The receiving end 131 of the connecting pipe 13 is connected to the inner shrink hole 121a of the plug-in section 121 of the male lower shell 12 and the outer pipe of the first section 13a of the connecting pipe 13. The wall 13aa is in relative sliding fit with the inner tube wall 12a of the male lower shell 12, that is, the connecting pipe 13 can be retracted into the inside of the male lower shell 12 or extended outward to perform reciprocating motion.

And because the outer diameter of the first section 13a of the connecting pipe 13 is smaller than the inner diameter of the male lower shell 12, the two are configured as a non-tight fit, and the two can perform relative reciprocating movements, and in order to provide the two reciprocating For sealing effect during movement, 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 relative movement in the axial direction. sex.

Since the outer diameter of the first section 13a of the connecting pipe 13 is larger than the diameter of the inner shrinkage hole 121a of the plug-in section 121 of the male lower shell 12, the outer diameter of the second section 13b is smaller than that of the male lower shell. The aperture of the inner shrinkage hole 121a of the plug-in section 121 is 12, so when the first and second sections 13a and 13b of the connecting pipe 13 are slidingly matched with the male lower shell 12, the first section of the connecting pipe 13 The step portion 136 is clamped at the inner shrinkage hole 121a to form a limit, thereby preventing the connecting tube 13 from being separated from the male lower shell 12 during its reciprocating telescopic movement.

As shown in FIGS. 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 151 a and a bottom side. 151b.

The two ends of the valve core body 152 are respectively provided with the valve core base 151 and the valve core head 153. The diameter of the valve core head 153 is larger than the diameter of the valve core body 152, but smaller than the first diameter. The inner diameter of the through hole 135a and the radial outer surface of the valve core head 153 are provided with at least one annular groove 1531, and a first sealing body 1532 is set in the annular groove 1531.

In addition, the valve core shaft part 152 is sleeved with a first spring 14. The valve core shaft part 152 and the first spring 14 are inserted into the inside of the male lower shell 12 from the upper end of the male lower shell 12, and The bottom side 151b of the valve core base 151 is locked at the bottom of the countersunk hole 122 of the male lower housing 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 screw-locked through internal and external threads, and the fixed valve core is The top side 151a of the valve core base 151 of 15 abuts the bottom surface 11c of the male screw hole 11b, and the bottom side 151b of the valve core base 151 is clamped at the bottom of the countersunk hole 122 of the male lower housing 12. The valve core base 151 is clamped between the male head and the lower shell 11, 12, and the fixed valve core 15 is fixed and positioned by the combination of the two, and the sealing body 3 also provides the male head and the lower shell. The sealing between 11 and 12.

The outside of the valve core head 153 and the inner wall surface of the first through hole 135a of the connecting pipe 13 must perform relative reciprocating sliding (opening or closing), so the arrangement between the two is not a tight fit. In the normally closed state, the first sealing body 1532 can be used to fill the micro gap between the two, thereby providing a seal between the valve core head 153 and the first through hole 135a of the connecting pipe 13 in the normally closed state. sex.

The valve core base 151 is provided with several notches 154 arranged at equal or unequal intervals, and the plurality of notches 154 can serve as passages for fluid to pass through.

As shown in Figure 1B, the fixed valve core 15 and a first spring 14 are housed in the male joint 1, and the first spring 14 is sleeved on the valve core rod of the fixed valve core 15. Outside the body 152, one end of the first spring 14 is pressed against the bottom side 151b of the valve core base 151 of the fixed valve core 15, and the other end is pressed against the inside of the first constriction 135 of the connecting pipe 13. The inner surface 135b next to the first through hole 135a.

Please refer to Figure 2A and Figure 2B. The female joint 2 includes: a female upper shell 21, a female lower shell 22, a second spring 23, a movable valve body 24 and a circular tube sliding sleeve. 25.

The upper end of the female head housing 21 has a receiving section 211, and the lower end has a screw lock section 212. The outside of the screw lock section 212 has a plurality of external threads. The receiving section 211 of the female head shell 21 has A joint platform 2111 protrudes from the inner wall toward the center, and the upward side end surface 2111a of the joint platform 2111 has a sealing body accommodating groove 2112, and a third sealing body 3113 is disposed in it. The joint platform 2112 is close to There is a through hole 2114 in the center and penetrates the joint platform 2111.

The wall surface of the receiving section 211 of the female head housing 21 has a plurality of through holes 2115, and a steel ball 2116 is disposed in each of the plurality of through holes 2115. The steel ball 2116 can be oriented in the radial direction of the female head housing 21 in the through holes 2115. , moves inward or outward, and the outer diameter of the receiving section 211 of the female head housing 21 is larger than the outer pipe diameter of the screw lock section 212 of the female head housing 21, and a connection is formed between the two. Second level department 2117.

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 surface of the screw hole 22a has a plurality of internal threads, and the bottom of the female screw hole 22a has a bottom surface 22b, and there are no internal threads on the wall surface of the female screw hole 22a close to the bottom surface 22b of the female screw hole 22a to form a Annular groove 2211, a sealing body 3 is provided inside the annular groove 2211. The female lower shell 22 has a third step portion 22c at one third of its upper end.

The female head upper shell 21 and the female head lower shell 22 are assembled by mutually screwing internal and external threads, and the sealing body 3 provides both the female head upper shell 21 and the female head lower shell 22 To ensure the sealing between them, after the female head upper shell 21 and the female head lower shell 22 are assembled with each other, a valve body activity space 22d is formed between the joint platform 2111 and the bottom surface 22b.

The movable valve body 24 has a valve body base 241 and a valve body head 242 . The valve body head 242 is formed by extending upward from the upward side of the valve body base 241 . The valve body base 241 has one or more notches 243 arranged at equal or unequal intervals. The plurality of notches 243 Can be used as a channel for fluid to pass through.

The outer diameter of the valve body head 242 is smaller than the outer diameter of the valve body base 241 , and the outer diameter of the valve body head 242 is smaller than the diameter of the through hole 2114 . The valve body head 242 is adjustable relative to the through hole 2114 . The through hole 2114 can be opened or closed correspondingly by sliding fit. In order to further increase the sealing between the valve body head 242 and the through hole 2114, an outer edge surface of the valve body head 242 is provided. There is at least one groove 2421, and a fourth sealing body 2422 can be disposed in the groove 2421, so that the fourth sealing body 2422 fills the gap between the valve body head 242 and the through hole 2114 of the joint platform 2111. Micro gap to achieve 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 disposed in the valve body movable space 22d, and the upper end 231 of the second spring 23 is supported on the valve body 22d. The valve body base 241 is opposite to the other side of the valve body head 242. The lower end 232 of the second spring 23 presses against the bottom surface 22b, and the second spring 23 pushes up the movable valve body 24, so that The movable valve body 24 and the through hole 2114 in the center of the joint platform 2111 maintain 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 tapers from top to bottom to form a tapered surface 254 .

A third spring 26 is sleeved on the outside of the female head housing 21, and the lower section 252 of the circular tube sliding sleeve 25 is sleeved on the outside of the third spring 26, and is connected by the upper end 261 of the third spring 26. The lower side of the limiting portion 253 of the circular tube sliding sleeve 25 is supported, 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 of the circular tube sliding sleeve 25 253 An upper side 253a abuts the second step 2117 of the female head housing 21, so that the circular tube sliding sleeve 25 can move upward relative to the outer axial direction of the female head housing 21 to prevent the circular tube from moving upward. When the sliding sleeve 25 is separated from the outside of the female head housing 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 portion 22c to prevent the circular tube sliding sleeve 25 from detaching downwards. The female head is under the shell 22.

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. The tapered surface 254 located inside the upper section 251 of the circular tube sliding sleeve 25 will be located at The plurality of steel balls 2116 in the plurality of through holes 2115 of the connecting section 211 of the female head casing 21 push toward the inside of the female head casing 21 , and the third spring 26 continues to support the circular tube sliding sleeve 25 , so that the tapered surface 254 of the circular tube sliding sleeve 25 maintains the locked state of the plurality of steel balls 2116.

When operating the male joint 1 and the female joint 2 of the present invention for quick connection, first pull down the circular tube sliding sleeve 25 outside the female head housing 21 to release the pair of conical surfaces 254 of the circular tube sliding sleeve 25 The plurality of steel balls 2116 are in a locked state, and the frontmost end surface of the insertion end 132 of the connecting pipe 13 of the male joint 1 is in contact with the third sealing body 2113 at the joint platform 2111 of the female joint 2, The third sealing body 2113 provides preliminary sealing 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 have also been pushed against each other.

And continue to apply external force to connect the male connector 1 to the female connector 2. Since the male connector 1 and the female connector 2 continue to approach each other, the connecting pipe 13 is subjected to the thrust in the axial direction, and its internal The first spring 14 is also compressed by the axial force at the same time, so the connecting pipe 13 is pressed in the opposite direction and retracts into the inside of the male lower shell 12. When the connecting pipe 13 is retracted into the male head, behind the interior of the lower shell 12, and the insertion section 121 of the male lower shell 12 of the male connector 1 is inserted into the receiving section 211 of the female upper shell 21 of the female connector 2, and the receiving section 211 is provided The plurality of steel balls 2116 are correspondingly clamped in the arc-shaped groove 123 outside the plug section 121 so that the male and female connectors 1 and 2 are locked. And then loosen the circular tube sliding sleeve 25 and push the lower side of the limiting portion 253 of the circular tube sliding sleeve 25 by the third spring 26, and then push the circular tube sliding sleeve 25 upward until it is reset. 254 presses the plurality of steel balls 241 inward to lock, thereby ensuring that the male and female joints 1 and 2 will not become loose due to excessive internal transmission fluid pressure.

Please refer to Figure 3, and please refer to Figures 1A to 2B. As shown in the figure, when the outer tube bodies of the male and female connectors 1 and 2 are connected, the connecting tube 13 is retracted into the inside of the male connector 1, and the male connector 1 The internal valve core head 153 of the fixed valve core 15 will also gradually protrude from the first through hole 135a of the connecting pipe 13 due to the engagement of the male connector 1 and the female connector 2, and continue to move toward it. The docking movable valve body 24 is supported by the valve body head 242 , and at the same time compresses the second spring 22 supported on one side of the movable valve body 24 , and causes the movable valve body 23 to withdraw from the original blocking and sealing part. The position of the through hole 213b at the center of the joint platform 213 is such that the through hole 213b is in a smooth state, allowing fluid to pass through the through hole 213b, so that the male and female connectors 1 and 2 can complete the docking operation.

The main purpose of this utility model is to improve the difficulty in processing existing quick joints when setting the sealing ring in the inner wall of the tube or the screw hole, and to improve the shearing force generated along the axial direction when the male and female joints are assembled or removed. The force causes the sealing ring to be turned over or pulled out together, or the sealing ring is scratched or damaged. Therefore, the utility model replaces the space (annular groove) where the sealing body is originally installed with the existing inner space in the screw hole or round tube. The wall surface is instead arranged on the outer pipe wall at the relative sliding fit position of the pipe body components. In this way, processing on the outer wall surface of the pipe body is more convenient and simpler than the existing processing in the hole of the pipe body, and The precision control is more precise, and the sealing ring is set in the annular groove outside the pipe body. The multiple annular grooves provide positioning and fixation of the sealing ring, and when the male and female joint components slide relative to each other, When matched, the plurality of sealing rings will not be turned over or pulled out of their original positions due to shearing force, thereby improving various existing deficiencies.

The above has provided a detailed description of the present utility model, and the above description is only a preferred embodiment of the present utility model and should not be used to limit the scope of the present utility model. That is to say, all equal changes and modifications made in accordance with the present utility model should still fall within the scope of the patent of the present utility model.

Claims (9)

1. A quick connector structure, characterized by:

the male connector is provided with a male upper shell, a male lower shell, a connecting pipe and a fixed valve core, wherein the male upper shell is mutually jointed with the male lower shell, the connecting pipe is slidably inserted into the lower end of the male lower shell, at least one first annular groove is formed in the outer surface of the connecting pipe, a second sealing body is sleeved in the first annular groove, the fixed valve core is sleeved with a first spring, one end of the fixed valve core is fixed in the male connector, and the other end of the fixed valve core extends into the connecting pipe;

the female connector is provided with a female upper shell, a female lower shell and a circular tube sliding sleeve, wherein the female upper shell and the female lower shell are mutually connected and jointly define a valve body movable space, a third spring is sleeved outside the female connector upper shell, the circular tube sliding sleeve is slidably sleeved outside the female upper shell and the third spring, a joint platform is arranged inside the female upper shell and 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, and the upper end of the second spring upwards props the movable valve body to enable the movable valve body to seal the through hole of the joint platform;

after the male connector and the female connector are connected, the connecting pipe is compressed and retracted inwards into the male connector, so that one end of the fixed valve core extending into the connecting pipe can extend out of the connecting pipe to be butted with the movable valve body, and the movable valve body is pushed to move in the opposite direction of the connecting platform, so that the through hole originally sealed by the movable valve body is opened, and the inside of the male connector and the inside of the female connector are kept smooth.

2. The quick connector structure of claim 1, wherein: the male connector is provided with a male connector connecting section and a plug-in section, wherein the male connector connecting section is arranged at the upper end of the male upper shell, the plug-in section is arranged at the lower end of the male lower shell, a plurality of external threads are arranged outside the male upper shell, a plurality of internal threads are arranged on the inner wall surface of the male upper shell, and a plurality of external threads are arranged outside the upper end of the male lower shell; the male upper shell is mutually screwed and assembled with external threads arranged outside the male lower shell through the plurality of internal threads.

3. The quick connector structure of claim 1, wherein: the female connecting section is arranged at the lower end of the female lower shell, a plurality of external threads are arranged on the outer surface of the female connecting section, the upper end of the female upper shell is provided with a connected section, the lower end of the female upper shell is provided with a screw locking section, and a plurality of external threads are arranged outside the screw locking section.

4. The quick connector structure of claim 1, wherein: the movable valve body is provided with a valve body base and a valve body head, the valve body head is formed by upwards extending one side of the valve body base, the valve body base is provided with one or more notches which are arranged at equal intervals 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.

5. The quick connector structure of claim 1, wherein: the third spring is sleeved outside the upper shell of the female head, the lower section of the circular tube sliding sleeve is sleeved outside the third spring, the upper end of the third spring props against the lower side of the limiting part of the circular tube sliding sleeve, the lower end of the third spring props against one end face at the upper end of the lower shell of the female head, and the upper side face of the limiting part of the circular tube sliding sleeve props against the second step part of the upper shell of the female head, so that the circular tube sliding sleeve can be prevented from being separated from the outer part of the upper shell of the female head when relatively carrying out reciprocating movement upwards or downwards along the outer axial direction of the upper shell of the female head.

6. The quick connector structure of claim 1, wherein: the circular tube sliding sleeve is provided with an upper section and a lower section, two ends of the circular tube sliding sleeve are open, a limiting part is arranged on the inner side wall surface between the upper section and the lower section, a conical surface is arranged on the inner side surface of the upper section of the circular tube sliding sleeve, and the upper end and the lower end of the third spring are respectively propped against the limiting part of the circular tube sliding sleeve and the protruding part of the outer surface of the female joint.

7. The quick connector structure of claim 1, wherein: the lower end of the male lower shell is provided with a plug-in section, the upper end and the lower end of the connecting pipe are respectively provided with a receiving end and a plug-in end, the receiving end of the connecting pipe is plugged in the plug-in section and can axially move relative to the plug-in section, the tail end of the plug-in end of the lower end of the connecting pipe is inwards tapered towards the center direction of the connecting pipe to form a first shrinkage part, and the first shrinkage part is provided with a first through hole.

8. The quick connector structure of claim 1, wherein: the fixed valve core is provided with a valve core base, one side of the valve core base is extended with a valve core rod body, the tail end of the valve core rod body is provided with a valve core head, the outer surface of the valve core head is provided with at least one annular groove, the annular groove is sleeved with a first sealing body, the upper end of the first spring props against the fixed valve core, and the lower end of the first spring props against the inside of the first necking part of the connecting pipe.

9. The quick connector structure of claim 1, wherein: the upper end and the lower end of the female joint are respectively provided with a connected section and a female joint connecting section, the wall surface of the connected section is provided with a plurality of holes and is respectively provided with at least one steel ball, the bottom of a female joint screw hole is provided with a bottom surface, the movable valve body is arranged between the lower side of the joint platform and the bottom surface, the movable valve body is provided with 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 upwards props against the movable valve body, and the lower end downwards props against the bottom surface, so that the movable valve body seals the through hole.