Snap-fit locking connector

Abstract

Disclosed in the present invention is a snap-fit locking connector, comprising a lock block, a connecting sleeve, an upper housing assembly, a locking clamping sleeve and a lower housing assembly, wherein an upper valve core is elastically provided in the upper housing assembly, a first sealing ring is provided on the upper valve core, an ejector rod and a lower valve core are provided in the lower housing assembly, the lower valve core is sleeved on an outer side wall of one side of the ejector rod, and a second sealing ring is provided on the ejector rod. In the present invention, the upper housing assembly is configured to press the lower housing assembly, the ejector rod abuts against the upper valve core, the lock block is snap-fitted to the upper housing assembly for fixing and limiting, and then the lock block is limited by means of the locking clamping sleeve, such that the ejector rod abuts against the upper valve core without clearance therebetween while the lower housing assembly and the upper housing assembly are in connection communication with each other, thus the lock block can be prevented from being automatically unlocked. During disassembly, the locking clamping sleeve is released, the lock block is moved and the upper housing assembly is enabled to be automatically ejected, and a communication position is sealed synchronously by means of the sealing rings, thereby achieving the purpose of disassembly without leakage.

Description

Snap-fit ​​locking connector Technical Field

[0001] This invention relates to the field of equipment cooling pipe fittings, and in particular to a snap-fit ​​locking connector. Background Technology

[0002] Currently, quick-connect devices widely used in big data center liquid cooling pipeline connections consist of a male plug and a female connector. During use, the male plug and female connector are inserted to connect the pipeline. However, in actual use, after the male plug and female connector are connected, there is a risk that the locking mechanism may automatically unlock due to misoperation, external vibration, or pulse pressure, leading to accidental disconnection of the pipeline. This can cause heat-generating components to fail to cool effectively, resulting in functional degradation, damage, or even spontaneous combustion. Technical issues

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a snap-fit ​​locking connector that can ensure locking stability, prevent automatic unlocking, and prevent media leakage during disassembly. Technical solutions

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A snap-fit ​​locking connector is provided, comprising a connecting sleeve movably equipped with a locking block, an upper housing assembly snapped into the locking block, a locking sleeve adjustablely fitted on the outside of the connecting sleeve and abutting and limiting the locking block, and a lower housing assembly detachably connected to the connecting sleeve. An upper valve core is elastically provided in the upper housing assembly, and the upper valve core can reciprocate along its axial direction within the upper housing assembly. After movement, the upper valve core can automatically reset by elastic force. A first sealing ring is provided on the upper valve core, enabling a sliding sealing fit between the upper valve core and the upper housing assembly through the first sealing ring. A push rod and an elastically provided lower valve core are provided in the lower housing assembly, and the lower valve core can reciprocate along its axial direction within the lower housing assembly. After movement, the lower valve core can automatically reset by elastic force. The lower valve core is fitted onto the outer wall of one end of the push rod, and a second sealing ring is provided on the push rod at the corresponding fitting position, enabling a sliding sealing fit between the lower valve core and the lower housing assembly through the second sealing ring. In use, the upper housing assembly squeezes the lower valve core, causing relative displacement between the lower valve core and the push rod, and the push rod pushes out of the upper valve core, thus connecting the upper and lower housing assemblies. The upper housing assembly is then locked by a locking block. The locking sleeve is then moved and adjusted on the outside of the connecting sleeve and abuts against the limiting locking block to limit its position. When disassembling, the locking sleeve is adjusted and moved away, losing its restriction on the locking block. The locking block is then pressed to release its locking position, and the upper housing assembly is no longer restricted. Under the action of elastic force, the upper valve core pushes back the push rod, the lower valve core resets, and the liquid outlet end of the upper housing assembly seals against the first sealing ring, while the second sealing ring seals against the liquid outlet end of the lower housing assembly.

[0005] With the above structure, the upper housing assembly squeezes the lower valve core, and the push rod pushes the upper valve core upward, thus connecting the upper and lower housing assemblies. The upper housing assembly is locked by a locking block, and the locking sleeve is pushed to engage with the connecting sleeve while simultaneously abutting the limiting locking block. This eliminates the movement gap of the locking block and limits its own rotation, preventing the locking block from automatically unlocking due to external forces. When disassembling, the locking sleeve is pushed out, followed by the locking block. The upper housing assembly is no longer locked. Under the action of elastic force, the upper valve core pushes back the push rod. During this process, the upper valve core and the push rod remain in contact, and the upper valve core and the upper housing assembly maintain a sliding seal fit with no gaps for residual media. At the same time, the liquid outlet end of the upper housing assembly is sealed to the upper valve core through the first sealing ring, and the push rod is sealed to the liquid outlet end of the lower housing assembly through the second sealing ring. That is, the upper housing assembly and the lower housing assembly are separated by squeezing the button, so that there is no media leakage when the connecting sleeve is pulled out of the upper housing assembly. The structure is simple and compact and easy to operate.

[0006] To simplify the structure and facilitate installation, preferably, a connecting boss is provided on one side of the connecting sleeve, and a fixing boss is provided on the other side of the connecting sleeve to abut against the limiting locking sleeve. Both the connecting boss and the fixing boss are integral with the connecting sleeve. A through hole communicating with the connecting sleeve is provided on the connecting boss, and a locking block is disposed within the through hole. An opening groove is provided on the connecting boss at the position corresponding to the locking block, penetrating the side of the connecting boss. The locking block can move horizontally through the opening groove, allowing horizontal displacement of the locking block on the connecting boss. A positioning groove is provided on the connecting boss at the lower end of the opening groove. A clearance hole communicating with the through hole is provided on the locking block. A clearance slope is provided on one side of the clearance hole opening, gradually sloping upwards from the clearance hole wall to the outer surface of the connecting boss, allowing the clearance hole to... The opening of the positioning hole near the top rod is smaller than the opening of the clearance hole, and the inclination direction of the clearance slope forms a certain angle with the movement direction of the locking block, so that the upper housing assembly can push the locking block to move through the clearance slope when it is inserted into the lower housing assembly; one side of the locking block is provided with an extension section extending out of the connecting boss, the extension section is on the side of the locking block facing the lower housing assembly, and the extension section is located outside the connecting sleeve. Two positioning bosses are symmetrically provided on the inner side wall of the extension section. A first placement groove is provided on the extension section at the position corresponding to the two positioning bosses. A first guide post is provided in the first placement groove. A return spring is provided in the first placement groove and sleeved on the outside of the first guide post. One end of the return spring abuts against the bottom of the first placement groove, and the other end of the return spring extends out and abuts against the corresponding position on the connecting sleeve.

[0007] To facilitate the movement and limiting of the locking sleeve, preferably, a locking boss is provided at the position corresponding to the positioning groove on one side of the locking sleeve, and an open through groove is provided on the other side of the locking sleeve, making the locking sleeve an open sleeve. A stop boss is fitted at the position of the positioning boss at the opening of the open through groove. Each stop boss has a vertically extending "V"-shaped through groove penetrating the inner wall of the locking sleeve on its inner sidewall. Two "V"-shaped through grooves are located on the inner wall of the locking sleeve, and are respectively located on both sides of the open through groove. The outer sidewall of the stop boss at the corresponding end abuts against the outer sidewall of the positioning boss, allowing the stop boss to be inserted between the positioning boss and the outer wall of the connecting sleeve, preventing the extension section from being pressed and achieving locking of the locking block. An opening is also provided on the outer sidewall of the locking sleeve, and an integrally connected... The lever has a first groove formed between its left and right ends and the wall of the opening, and a second groove formed between its non-connecting end and the wall of the opening. The two ends of the second groove are respectively connected to the two first grooves. A limiting protrusion is provided on the inner side wall of the lever. A first protrusion that fits against the inner wall of the locking sleeve is provided on the outer side wall of the connecting sleeve, and a second protrusion is provided at the position corresponding to the second groove. When the stop protrusion on the locking sleeve is not inserted between the positioning protrusion and the outer wall of the connecting sleeve, the lower end face of the second protrusion fits against the upper end face of the limiting protrusion. A third protrusion is provided at the position corresponding to the stop protrusion on the connecting sleeve. The third protrusion extends into the "V" shaped through groove for limiting. By having multiple third protrusions extend into the two "V" shaped through grooves respectively, the locking sleeve is prevented from rotating or shifting on the connecting sleeve.

[0008] To simplify the connection structure with the return spring, preferably, a second placement groove is provided on the outer wall of the connecting sleeve at the position corresponding to the open through groove, and a second guide post is provided in the second placement groove. The protruding end of the return spring is sleeved on the outside of the second guide post and abuts against the bottom of the second placement groove.

[0009] To improve the stability of the connection limit and ensure the synchronization of unlocking and sealing of the first sealing ring, preferably, the upper housing assembly includes a male plug sleeve with an axially penetrating hole. A directional boss is provided at one end of the outer side of the male plug sleeve, and a limiting boss is provided at the other end. The side of the limiting boss near the insertion end of the male plug sleeve is a conical surface, the diameter of which gradually decreases towards the insertion end of the male plug sleeve. When the male plug sleeve is inserted into the connecting sleeve, the conical surface cooperates with the clearance slope to ensure that the male plug sleeve... While being inserted into the connecting sleeve, the locking block is pushed to move. Simultaneously, a limiting groove is provided on the male plug sleeve at the position between the directional boss and the limiting boss, the width of which is greater than the thickness of the locking block. A first compression spring is provided in the placement hole, and a backstop ring is installed at the end of the placement hole away from the connecting sleeve. One end of the first compression spring is fixedly connected to the backstop ring fixed in the placement hole, and the other end is fixedly connected to the upper valve core. A first sealing ring is embedded on the outer side of the upper valve core, and the first sealing ring abuts against the wall of the placement hole. During installation, the male plug sleeve extends into the connecting sleeve and passes through the clearance hole and the locking block. The upper end face of the limiting boss abuts against the lower end face of the locking block, thus locking and limiting the male plug sleeve.

[0010] To facilitate the limiting of the upper valve core and prevent the first sealing ring from being exposed and affecting the sealing effect, preferably, a transition slope is provided around the outer side wall of the upper valve core, and there are multiple transition slopes. The multiple transition slopes are arranged at intervals along the circumference of the upper valve core, and a limiting slope is provided on the wall of the placement hole at the position corresponding to the transition slope. The limiting slope fits with the transition slope, and makes the end face of the non-connecting end of the upper valve core flush with the end face of the corresponding end of the placement hole.

[0011] To ensure the synchronization of unlocking and sealing of the second sealing ring, preferably, the lower housing assembly further includes a female plug sleeve screwed onto the connecting sleeve. A stepped hole is provided within the connecting sleeve. A push rod extending into the small end of the stepped hole is fixed within the female plug sleeve. The extended end of the push rod is inserted into the directional hole of the lower valve core. An installation groove is provided within the female plug sleeve at a position corresponding to the connection with the connecting sleeve. An installation ring is connected to one end of the push rod, and the installation ring is fitted and fixed within the installation groove. The connecting sleeve and the female plug sleeve are connected through the installation ring. A second compression spring is also fitted on the outside of the push rod. A connecting protrusion is circumferentially wound around one side of the lower valve core, forming a ring on the outer wall of the lower valve core. One end of the second compression spring is fitted onto the lower valve core and abuts against the lower end face of the connecting protrusion. The other end of the second compression spring abuts against the inner wall of the installation ring. The second sealing ring is embedded on the outer wall of the extended end of the push rod, and the second sealing ring fits against the inner wall of the directional hole.

[0012] To facilitate the limiting of the lower valve core and prevent the second sealing ring from being exposed and affecting the sealing effect, preferably, a transition hole is provided between the through hole and the stepped hole. A sleeve extending into the large end of the stepped hole is fitted on the outside of the second compression spring. An upper sealing ring, an isolation ring, and a lower sealing ring are stacked sequentially from top to bottom between the end face of the sleeve extending into the hole and the bottom of the stepped hole. The upper end face of the upper sealing ring abuts against the bottom of the stepped hole, and the lower end face of the lower sealing ring abuts against the end face of the sleeve extending into the hole. When the second compression spring is not compressed, the lower sealing ring and the isolation ring are both fitted on the outside of the lower valve core, and the outer end face of the sleeve abuts against the inner wall of the mounting ring.

[0013] To facilitate the positioning of the sleeve and simplify the structure, preferably, the stepped surface of the stepped hole is a sloping structure that is narrower at the top and wider at the bottom. A first positioning sloping surface is provided on the outer wall of the sleeve at the position corresponding to the stepped surface of the stepped hole, and a second positioning sloping surface is provided on the inner wall of the sleeve at the position corresponding to the first positioning sloping surface, thereby reducing the opening of the sleeve near the connecting boss. During installation, the sleeve extends into the stepped hole, with the end face of the sleeve extending into it abutting against the lower end face of the lower sealing ring. The first positioning sloping surface fits against the stepped surface of the stepped hole, and the second positioning sloping surface fits against the upper end face of the connecting boss.

[0014] To avoid interference with the movement of the locking sleeve, it is preferable that both the second protrusion and the limiting protrusion have inclined sections to facilitate the movement and repositioning of the locking sleeve.

[0015] In this invention, the locking structure of the locking block can also be configured as follows:

[0016] The locking sleeve is configured as a sleeve structure, and the locking sleeve can rotate on the connecting sleeve but cannot move axially. A stop protrusion is provided on the outer wall of the locking sleeve to abut against the extension section and the locking sleeve.

[0017] To prevent the locking sleeve from continuing to rotate or turn back after the stop protrusion enters between the locking sleeve and the extension section, the locking sleeve and the connecting sleeve are equipped with an anti-rotation structure. The anti-rotation structure can prevent the locking sleeve from rotating when the stop protrusion is pressed between the extension section and the locking sleeve.

[0018] To prevent the locking sleeve from continuing to rotate after the stop protrusion enters between the locking sleeve and the extension section, the anti-rotation structure includes an elastic tab on the locking sleeve. The inner wall of the elastic tab has a protrusion, and the outer wall of the connecting sleeve also has a ridge that matches the protrusion. To facilitate the protrusion on the elastic tab to smoothly cross the ridge, both the protrusion and the ridge are elongated, and the end faces of both the protrusion and the ridge are triangular or trapezoidal.

[0019] To prevent the locking sleeve from rotating back after the stop protrusion enters between the locking sleeve and the extension, the anti-rotation structure also includes a first protrusion on the locking sleeve and a second protrusion on the connecting sleeve. When the stop protrusion abuts against the extension and the locking sleeve, the first protrusion and the second protrusion abut against each other.

[0020] To facilitate the installation of the locking sleeve, the fixing boss on the connecting sleeve is removed, and the connecting sleeve is directly set as a stepped shaft. The locking sleeve is then fitted onto the small diameter end of the connecting sleeve. At this time, the lower housing assembly is still connected and fixed to the small diameter end of the connecting sleeve by a threaded connection, or the lower housing assembly is fitted onto the small diameter end of the connecting sleeve and then fixed by welding.

[0021] To ensure that the stop protrusion can smoothly enter between the locking sleeve and the extension section, the inner wall of the extension section has a second arc surface, and the stop protrusion has a first arc surface that matches the second arc surface.

[0022] To prevent the return spring from affecting the rotation of the locking sleeve, the locking sleeve is also provided with an opening to allow the return spring to pass.

[0023] To allow staff to directly observe the rotation of the locking sleeve, the extension section and the locking sleeve are marked accordingly. Beneficial effects

[0024] This invention features an upper housing assembly that presses against a lower housing assembly and a push rod that abuts against an upper valve core. A locking block engages with the upper housing assembly for fixation and limitation, and a locking sleeve further limits the locking block. This design ensures that the lower and upper housing assemblies are connected and connected, while preventing the locking block from unlocking automatically. During disassembly, the locking sleeve is released, and the locking block is moved. At this time, the upper housing assembly can automatically pop out, and a sealing ring simultaneously seals the connection point, achieving the goal of no external leakage during disassembly. Attached Figure Description

[0025] Figure 1 is an exploded view of Example 1.

[0026] Figure 2 is a schematic diagram of the assembly structure of Embodiment 1 before connection.

[0027] Figure 3 is a schematic diagram of the male plug sleeve in Example 1.

[0028] Figure 4 is a schematic diagram of the upper valve core in Example 1.

[0029] Figure 5 is a schematic diagram of the installation structure of the second guide post and the connecting sleeve in Embodiment 1.

[0030] Figure 6 is a schematic diagram of the internal structure of the connecting sleeve in Example 1.

[0031] Figure 7 is a schematic diagram of the locking block in Example 1.

[0032] Figure 8 is a schematic diagram of the locking sleeve in Example 1.

[0033] Figure 9 is a structural schematic diagram of the open through groove and the stop boss in Example 1.

[0034] Figure 10 is a schematic diagram of the lower valve core in Example 1.

[0035] Figure 11 is a three-dimensional structural diagram of the mounting ring and top rod in Example 1.

[0036] Figure 12 is a schematic diagram of the usage state of Example 1.

[0037] Figure 13 is a three-dimensional schematic diagram of the assembly structure of Example 1.

[0038] Figure 14 is a schematic diagram of the installation structure of the third protrusion and the V-shaped through groove in Embodiment 1;

[0039] Figure 15 is a structural diagram of the connecting sleeve in Example 2;

[0040] Figure 16 is a structural diagram of the locking sleeve in Example 2;

[0041] Figure 17 shows the structure after the locking sleeve is rotated;

[0042] Figure 18 shows the fit between the first and second bosses after the locking sleeve is rotated.

[0043] The meanings of the labels in the attached diagram are as follows:

[0044] Connecting sleeve-1;

[0045] Connecting boss-10; Fixed boss-100; Opening slot-101; Positioning slot-102; Supporting boss-103;

[0046] Locking block-11; clearance hole-111; clearance bevel-112; extension section-113; positioning boss-114; first placement groove-115; second placement groove-116; anti-reverse protrusion-117;

[0047] Locking sleeve-12; Opening through groove-120; Locking boss-121; Stop boss-122; Paddle-123; "V" shaped through groove-124; First guide post-131; Second guide post-132; Return spring-14; First strip groove-141; Second strip groove-142; First protrusion-143; Second protrusion-144; Third protrusion-145; Step hole-15; Transition hole-16; Limiting protrusion-17; First positioning slope-171; Second positioning slope-172; Sloping section-18;

[0048] Upper valve core-2; First sealing ring-20; Transition slope-21;

[0049] Sleeve-3;

[0050] Male plug sleeve-4; Limiting boss-40; Placement hole-401; Anti-reverse ring-402; Limiting bevel-403; Orienting boss-41; Limiting groove-42;

[0051] Lower valve core-5; push rod-50; second sealing ring-51; connecting protrusion-52; directional hole-53; mounting ring-54;

[0052] Isolation ring - 60; First compression spring - 61; Second compression spring - 62; Upper sealing ring - 63; Lower sealing ring - 64;

[0053] Female plug sleeve-7; mounting groove-71; third sealing ring-72;

[0054] Stop protrusion - 120'; Elastic lever - 121'; First boss - 123'; First arc surface - 124'; Opening - 125'; Marking - 126';

[0055] Protruding edge -100'; Second boss -101'; Second arc surface -102'. The best embodiment of the present invention

[0056] As shown in Figures 1 to 9, the present invention includes a connecting sleeve 1 movably provided with a locking block 11, an upper housing assembly that engages with the locking block 11, a locking sleeve 12 that is adjustablely sleeved on the outside of the connecting sleeve 1 and abuts against and limits the locking block 11, and a lower housing assembly that is detachably connected to the connecting sleeve 1. The locking block 11 can be horizontally displaced on the connecting sleeve 1, causing the center of the locking block 11 to offset from the center of the connecting sleeve 1. Since the connecting sleeve 1 and the upper housing assembly are coaxially arranged after insertion, when the locking block 11 is horizontally displaced, the center of the locking block 11 offsets from the center of the upper housing assembly, thus locking the upper housing assembly after insertion. When the upper housing assembly and the connecting sleeve 1 need to be unlocked, the locking block 11 resets, and the center of the locking block 11 becomes coaxial with the center of the upper housing assembly, releasing the locking of the upper housing assembly. The upper housing assembly and the connecting sleeve 1 can then be easily separated. The locking sleeve 12 is used to lock or unlock the locking block 11. In use, the upper housing assembly and the lower housing assembly are connected to the ports of the two pipelines respectively, and the upper housing assembly is inserted into the connecting sleeve 1 to achieve the connection between the two pipelines.

[0057] The upper housing assembly is elastically provided with an upper valve core 2, which is located at the insertion end of the upper housing assembly and can move up and down within the upper housing assembly. A first sealing ring 20 is provided on the upper valve core 2, which is located on the outer circumferential surface of the upper valve core 2, allowing the upper valve core 2 to achieve a sealing fit with the upper housing assembly while sliding up and down, thus sealing the insertion end of the upper housing assembly when the upper valve core 2 is not moving. The lower housing assembly is provided with a push rod 50 and... The lower valve core 5 is flexibly configured and has a sleeve structure. The lower valve core 5 is located at the insertion end of the connecting sleeve 1 and is sleeved on the outer side wall of the push rod 50. The lower valve core 5 is connected to the insertion end of the upper housing assembly 4. When the upper housing assembly is inserted into the connecting sleeve 1, the push rod 20 pushes the upper valve core 2 to move, and the connecting sleeve 1 pushes the lower valve core 5 to move. A second sealing ring 51 is provided at the corresponding sleeve position on the push rod 50. The second sealing ring 51 makes the push rod 50 and the lower valve core 5 form a sliding sealing fit. In use, the upper housing assembly presses against the lower valve core 5, causing the lower valve core 5 to move towards the other end of the push rod 50, thus breaking the sealing fit between the upper valve core 5 and the push rod 50. Simultaneously, the push rod 50 pushes out the upper valve core 2, causing the upper valve core 2 to move towards the other end of the upper housing assembly, breaking the sealing fit between the upper valve core 2 and the upper housing assembly, thus establishing a connection between the upper housing assembly and the connecting sleeve 1, and ultimately establishing a connection between the upper housing assembly and the lower housing assembly. Next, the locking block 11 engages with the upper housing assembly to limit its movement, locking the upper housing assembly and the connecting sleeve 1. Then, the adjusting locking sleeve 12 is moved outside the connecting sleeve 1 and abuts against the limiting locking block 11, locking the locking block 11. To prevent the locking block 11 from automatically shifting; when disassembling, adjust and remove the locking sleeve 12, press the locking block 11 to release the locking position, the upper housing assembly and the connecting sleeve 1 are unlocked, and the upper housing assembly can be easily pulled out from the connecting sleeve 1. During this process, under the action of elastic force, the upper valve core 2 gradually loses the thrust of the push rod 50, the upper valve core 2 is reset by elastic force, and the liquid outlet end of the upper housing assembly is sealed with the first sealing ring 20. At the same time, the lower valve core 5 gradually loses the thrust of the upper housing assembly, the lower valve core 5 is reset by elastic force, the lower valve core 5 and the push rod 20 resume sealing cooperation, and the second sealing ring 51 is sealed with the liquid outlet end of the connecting sleeve 1.

[0058] Specifically, a connecting boss 10 is provided at the insertion end of the connecting sleeve 1, and a fixing boss 100 for abutting against the limiting locking sleeve 12 is provided at the other end. The fixing boss 100 is located on the outer circumferential surface of the connecting sleeve 1. A through hole communicating with the connecting sleeve 1 is provided on the connecting boss 10, and the diameter of the through hole is adapted to the opening diameter of the connecting sleeve 1. The locking block 11 is installed in the through hole. An opening groove 101 is provided on the connecting boss 10 at the position corresponding to the locking block 11. The width of the opening groove 101 is adapted to the width of the locking block 11, and the opening groove 101 penetrates the side of the connecting boss 10, so that the locking block 11... 1. The locking block 11 can move outward or inward through the opening slot 101, thereby allowing the center of the locking block 11 to be adjusted relative to the center of the connecting sleeve 1. A positioning slot 102 is provided on the connecting boss 10 at the lower end of the slot corresponding to the opening of the opening slot 101. The positioning slot 102 is located on the side of the connecting boss 10 away from the upper housing assembly. A clearance hole 111 communicating with the through hole is provided on the locking block 11. The clearance hole 111 is elongated and its length direction is consistent with the movement direction of the locking block 11. A clearance slope 112 is provided on one side of the opening of the clearance hole 111.

[0059] In this invention, there may be two opening slots 101, which are located on the same diameter of the connecting sleeve 1. The positioning slot 102 may be located below one of the opening slots 101. Through the cooperation of the two opening slots 101, the locking block 11 can reciprocate to the two opening slots 101, thereby adjusting the relative position of the center of the locking block 11 and the center of the connecting sleeve 1.

[0060] One side of the locking block 11 is provided with an extension section 113 extending out of the connecting boss 10. The extension section 113 extends obliquely toward the locking sleeve 12. The inner wall of the extension section 13 is spaced apart from the outer wall of the connecting sleeve 1. Two positioning bosses 114 are symmetrically provided on the inner side wall of the extension section 113. The length direction of the positioning bosses 114 is consistent with the length direction of the extension section 113, so that the two positioning bosses 114 are spaced apart in the width direction of the extension section 113. A first placement groove 115 is provided on the extension section 113 at the position between the two positioning bosses 114. A first guide post 131 is provided in the first placement groove 115. There is a certain distance between the outer circular surface of the first guide post 131 and the groove wall of the first placement groove 115. The first guide post 131 is higher than the inner surface of the extension section 113. A return spring 14 is provided in the first placement groove 115 and sleeved on the outside of the first guide post 131. One end of the return spring 14 abuts against the bottom of the first placement groove 115, and the other end of the return spring 14 extends out and points to the connecting sleeve 1. This not only realizes the connection between the return spring 14 and the extension section 113, but also effectively prevents the return spring 14 from being displaced on the extension section 113. Meanwhile, a second placement groove 116 is provided on the outer wall of the connecting sleeve 1 at the position corresponding to the opening through groove 120. A second guide post 132 is provided in the second placement groove 116. There is a certain distance between the outer circular surface of the second guide post 132 and the groove wall of the second placement groove 116. The first guide post 132 is higher than the outer surface of the connecting sleeve 1. The protruding end of the reset spring 14 is sleeved on the outside of the second guide post 132 and abuts against the bottom of the second placement groove 116. This not only realizes the connection between the reset spring 14 and the connecting sleeve 1, but also effectively prevents the reset spring 14 from being displaced on the connecting sleeve 1.

[0061] Meanwhile, a locking boss 121 is provided on one side of the locking sleeve 12 at the position corresponding to the positioning groove 102. The locking boss 121 engages with the positioning groove 102. An open through groove 120 is provided on the other side of the locking sleeve 12. A stop boss 122 is provided at the position of the opening of the open through groove 120 corresponding to the position of the positioning boss 114. The axial direction of the stop boss 122 is consistent with the length direction of the open through groove 120, and the stop boss 122 protrudes into the inner wall of the locking sleeve 12. Each stop boss 122 has a vertical "V" shaped protrusion penetrating the inner wall of the locking sleeve 12 on its inner sidewall. The "V"-shaped through groove 124 has one groove surface as the inner surface of the connecting sleeve 1 and the other groove surface as the side of the stop boss 122 away from the opening through groove 120. The outer wall of the stop boss 122 at the corresponding end fits and abuts against the outer wall of the positioning boss 114, so that the end of the locking sleeve 12 near the connecting boss 10 is stuck between the inner wall of the connecting section 113 and the outer wall of the connecting sleeve 1, thus restricting the connecting section 113. At this time, the connecting section 113 cannot be pressed, that is, the locking block 11 cannot be moved by pressing the connecting section 113, so that the position of the locking block 11 is locked. An opening is provided on the outer wall of the locking sleeve 12. A lever 123 is integrally connected within the opening. A first groove 141 is formed between the left and right sides of the lever 123 and the wall of the opening. A second groove 142 is formed between the non-connecting end of the lever 123 and the wall of the opening. The two ends of the second groove 142 are respectively connected to the two first grooves 141. A limiting protrusion 17 is provided on the inner wall of the lever 123. The limiting protrusion 17 is located at the non-connecting end of the lever 123, and the two end faces of the limiting protrusion 17 corresponding to the two ends of the connecting sleeve 1 are both beveled, so that the side of the limiting protrusion 17 is triangular or isosceles trapezoidal. A first groove 141 is formed between the left and right sides of the lever 123 and the wall of the opening. A first protrusion 143 is provided that fits against the inner wall of the locking sleeve 12, and a second protrusion 144 is provided on the outer wall of the connecting sleeve 1 at the position corresponding to the second strip groove 142. The two end faces of the second protrusion 144 and the two ends of the connecting sleeve 1 are both inclined, so that the side of the second protrusion 144 is triangular or isosceles trapezoidal. The lower end face of the second protrusion 144 fits against the upper end face of the limiting protrusion 17. A third protrusion 145 is provided on the connecting sleeve 1 at the position corresponding to the stop protrusion 122. The third protrusion 145 extends into the "V" shaped through groove 124 for limiting. By having multiple third protrusions 145 respectively engage with two "V" shaped through grooves 124, the locking sleeve 12 is prevented from rotating or shifting on the connecting sleeve 1.

[0062] In this invention, there can be multiple paddles 123, which are spaced apart along the circumferential direction of the locking sleeve 12. When there are multiple paddles 123, each paddle 123 can be provided with a limiting protrusion 17. In this case, there are also multiple second protrusions 144 on the inner wall of the connecting sleeve 1 corresponding to the limiting protrusions 17. In this invention, in order to facilitate the support of the locking sleeve 12, there can also be multiple first protrusions 143 on the outer wall of the connecting sleeve 1, and the multiple first protrusions 143 are set into multiple groups. The multiple first protrusions 143 in each group are arranged along the circumferential direction of the locking sleeve 12. The connecting sleeve 1 is arranged at intervals along its length, while multiple sets of first protrusions 143 are arranged at intervals along the circumference of the connecting sleeve 1. In this invention, the protrusion heights of the first protrusion 143, second protrusion 144, and third protrusion 145 on the connecting sleeve 1 can be equal. In this invention, there can be only two third protrusions 145 that engage with the two "V" shaped through grooves 124 respectively. The third protrusions 145 that engage with the two "V" shaped through grooves 124 respectively can also be divided into two groups, and multiple third protrusions 145 in the same group are arranged at intervals along the length of the connecting sleeve 1.

[0063] The upper housing assembly includes a male plug sleeve 4, on which an axially penetrating placement hole 401 is provided. A directional boss 41 is provided at one end of the outer side of the male plug sleeve 4, and a limiting boss 40 is provided at the other end of the outer side of the male plug sleeve 4. The diameter of the limiting boss 40 is adapted to the opening diameter of the connecting sleeve 1, so that the limiting boss 40 can be inserted into the connecting sleeve 1. The side of the limiting boss 40 near the lower housing assembly is a conical surface, which is adapted to the relief slope 112 on the locking block 11. During the process of inserting the male plug sleeve 4 into the connecting sleeve 1, through the cooperation of the conical surface and the relief slope 112, the conical surface on the limiting boss 40 can push the locking block 11 to move, ensuring that the center of the relief hole 11 is in a straight line with the center of the connecting sleeve 1. A limiting groove 42 is provided on the male plug sleeve 4 at the position between the directional boss 41 and the limiting boss 40. The width of the limiting groove 42 is greater than the thickness of the locking block 11, so that the locking block 11 can be inserted into the limiting groove 42. A first compression spring 61 is provided in the placement hole 401. A backstop ring 402 is fixedly provided at one end of the placement hole 401 away from the connecting sleeve 1. One end of the first compression spring 61 is fixedly connected to the backstop ring 402 fixed in the placement hole 401, and the other end of the first compression spring 61 is fixedly connected to the upper valve core 2. The first sealing ring 20 on the upper valve core 2 is sealed and fitted with the hole wall of the placement hole 401. During installation, the male plug sleeve 4 extends into the connecting sleeve 1 and passes through the clearance hole 111 and the locking block 11. When the male plug sleeve 4 is connected to the connecting sleeve 1, the limiting groove 42 corresponds to the locking block 11. When the locking block 11 is moved, the locking block 11 is inserted into the limiting groove 42. The end face of the limiting boss 40 near the limiting groove 42 abuts against the lower end face of the locking block 11 to limit the locking of the male plug sleeve 4.

[0064] A transition slope 21 is provided around the outer side wall of the upper valve core 2. The transition slope 21 gradually slopes outward while moving away from the connecting sleeve 1. There are multiple transition slopes 21, and the multiple transition slopes 21 are arranged at intervals along the circumferential direction of the upper valve core 2.

[0065] A limiting slope 403 is provided on the wall of the placement hole 401 at the position corresponding to the transition slope 21. The limiting slope 403 fits with the transition slope 21, which can effectively prevent the upper valve core 2 from detaching from the male plug sleeve 4. When the first compression spring 61 is not under pressure, the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the orifice of the corresponding end of the placement hole 401, that is, the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the protruding end of the male plug sleeve 4.

[0066] The lower housing assembly also includes a female plug sleeve 7 that is screwed onto the connecting sleeve 1. A stepped hole 15 is provided within the connecting sleeve 1. The diameter of the stepped hole 15 at the end furthest from the upper housing assembly is larger than the diameter at the end closest to the upper housing assembly. The end of the push rod 50 furthest from the lower valve core 5 is fixed within the female plug sleeve 7, and the end of the push rod 50 inserted into the lower valve core 5 is located at the small end of the stepped hole 15. The valve core 5 has an internal directional hole 53. The insertion end of the push rod 50 is fitted into the directional hole 53 of the lower valve core 5, and the insertion end of the push rod 50 is the end furthest from the female plug sleeve 7. The insertion end of the push rod 50 is sealed to the directional hole 53. An installation groove 71 is provided within the female plug sleeve 7 at a position corresponding to the connection sleeve 1. The groove 71 is located at the end of the push rod 50 furthest from the lower valve core 5. A mounting ring 54 is connected, and the mounting ring 54 has a through hole connecting the female plug sleeve 7 and the connecting sleeve 1. The mounting ring 54 is fitted and fixed in the mounting groove 71 and pressed and fixed by the end of the connecting sleeve 1 away from the upper housing assembly. A second compression spring 62 is also fitted on the outside of the push rod 50. A connecting protrusion 52 is wrapped around the lower valve core 5 in the circumferential direction near the female plug sleeve 7. One end of the second compression spring 62 is fitted on the lower valve core 5 and abuts against the lower end face of the connecting protrusion 52. The other end of the second compression spring 62 abuts against the mounting ring 54. A second sealing ring 51 is embedded on the outer wall of the extension end of the push rod 50. The second sealing ring 51 fits and abuts against the inner wall of the directional hole 53, so that when the extension end of the push rod 50 is located in the lower valve core 5, the extension end of the push rod 50 can block the directional hole 53.

[0067] A transition hole 16 is provided between the through hole on the connecting boss 10 and the stepped hole 15. A sleeve 3 is sleeved on the outside of the second compression spring 62. The sleeve 3 is located at the large end of the stepped hole 15. The outer wall of the sleeve 3 mates with the inner wall of the connecting sleeve 1, and the inner wall of the sleeve 3 mates with the connecting protrusion 52 on the lower valve core 5. The insertion end of the sleeve 3 is the end of the sleeve 3 closest to the connecting boss 10. The end face of the insertion end of the sleeve 3 is between the bottom of the stepped hole 15 and the bottom of the stepped hole 15. An upper sealing ring 63, an isolation ring 60, and a lower sealing ring 64 are stacked sequentially from the bottom of the hole to the end face of the extension end of the sleeve 3. The upper end face of the upper sealing ring 63 abuts against the bottom of the stepped hole 15, and the lower end face of the lower sealing ring 64 abuts against the end face of the extension end of the sleeve 3. When the second compression spring 62 is not compressed, the isolation ring 60 is sleeved on the outside of the lower valve core 5. The end of the sleeve 3 away from the connecting boss 10 is the outside, and the outer end face of the sleeve 3 abuts against the inner wall of the mounting ring 54.

[0068] The stepped surface of the stepped hole 15 is a sloping structure that is narrower at the top and wider at the bottom. That is, the large end of the stepped hole 15 and the small end of the stepped hole 15 are transitioned by the sloping structure. A first positioning sloping surface 171 is provided on the outer side wall of the sleeve 3 at the position corresponding to the stepped surface of the stepped hole 15, so that the sleeve 3 is stably installed in the large end of the stepped hole 15 and the sleeve 3 is prevented from being displaced at the large end of the stepped hole 15. A second positioning sloping surface 172 is provided on the inner side wall of the sleeve 3 at the position corresponding to the first positioning sloping surface 171. The second positioning sloping surface 172 cooperates with the connecting protrusion 52 on the lower valve core 5, so that the lower valve core 5 cannot be moved out from the end of the sleeve 3 near the connecting protrusion 10, thus preventing the lower valve core 5 from detaching from the connecting sleeve 1. During installation, the sleeve 3 extends into the stepped hole 15, and the end face of the sleeve 3 extends into it abuts against the lower end face of the lower sealing ring 64. The first positioning inclined surface 171 fits against the stepped surface of the stepped hole 15, and the second positioning inclined surface 172 fits against the upper end face of the connecting protrusion 52.

[0069] Since the sides of the second protrusion 144 and the limiting protrusion 17 are triangular or isosceles trapezoidal, both the second protrusion 144 and the limiting protrusion 17 are provided with inclined sections 18 to facilitate the movement and repositioning of the locking sleeve 12. One inclined section 18 is the side of the limiting protrusion 17 away from the lower housing assembly, and the other inclined section 18 is the side of the limiting protrusion 17 close to the second strip groove 142. This design makes it more convenient for the locking sleeve 12 to lock and unlock the locking block 11 when needed.

[0070] The working principle of this invention is as follows:

[0071] As shown in Figures 1 to 4, 9, and 14, before use, firstly, use a tool to open the opening slot 120 on the locking sleeve 12, that is, increase the inner diameter of the locking sleeve 12. Then, starting from the lower end of the connecting sleeve 1, slide the locking sleeve 12 onto the outside of the connecting sleeve 1 from bottom to top. Since the locking sleeve 12 is made of nylon 66 material, when it is fully inserted, the opening of the slot 120 springs back to its original width before being opened. At this time, the first protrusion... The outer wall of 143 fits against the inner wall of the locking sleeve 12. The third protrusion 145 extends into the "V" shaped through groove 124. The outer wall of the third protrusion 145 fits against the groove wall of the "V" shaped through groove 124. The lower end of the locking sleeve 12 abuts against the fixed protrusion 100 and limits its movement. At the same time, the lower end face of the second protrusion 144 fits against the upper end face of the limiting protrusion 17 and exposes the second placement groove 116 at the position of the opening through groove 120.

[0072] Next, the locking block 11 is inserted into the through hole of the connecting boss 10 through the opening slot 101, and the plane of the outer wall of the opening slot 101 is flush with the plane of the outer wall of the locking block 11. The center of the clearance hole 111 on the locking block 11 is on the same straight line as the center of the connecting sleeve 1. At the same time, one end of the return spring 14 abuts against the bottom of the first placement slot 115, and the other end of the return spring 14 abuts against the bottom of the second placement slot 116. In this way, the locking block 11 is movably set on the connecting sleeve 1.

[0073] Furthermore, in the male plug sleeve 4, one end of the first compression spring 61 is fixedly connected to the anti-reverse ring 402, and the other end of the first compression spring 61 is fixedly connected to the upper valve core 2. A first sealing ring 20 is embedded in the outer wall of the upper valve core 2. The outer wall of the first sealing ring 20 fits against the hole wall of the placement hole 401, so that the upper valve core 2 seals the placement hole 401. At the same time, the limiting inclined surface 403 fits against the transition inclined surface 21, and the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the corresponding end of the placement hole 401.

[0074] Next, as shown in Figures 1, 2, and 5 to 11, the upper sealing ring 63, the isolation ring 60, and the lower sealing ring 64 are sequentially placed in the stepped hole 15. The outer walls of the upper sealing ring 63 and the lower sealing ring 64 abut against the small hole end wall of the stepped hole 15. Then, the sleeve 3 is placed in, and the upper end face of the upper sealing ring 63 abuts against the bottom of the stepped hole 15. The lower end face of the lower sealing ring 64 abuts against the end face of the sleeve 3. The lower valve core 5 is placed in the sleeve 3. The end of the lower valve core 5 near the connecting boss 10 extends out of the sleeve 3 and is inserted into the isolation ring 60 and the lower sealing ring 64. Then, the second compression spring 62 is placed in.

[0075] Then, the mounting ring 54 on the push rod 50 is fitted and fixed in the mounting groove 71, the push rod 50 is placed vertically, and the second compression spring 62 is fitted on the push rod 50. Next, the female plug sleeve 7 is connected to the connecting sleeve 1, and one end of the second compression spring 62 abuts against the lower end face of the connecting protrusion 52, and the other end of the second compression spring 62 abuts against the inner side wall of the mounting ring 54. At the same time, the outer end face of the sleeve 3 abuts against the inner side wall of the mounting ring 54. At this time, the push rod 50 extends into the directional hole 53 through the second compression spring 62, and the outer side wall of the second sealing ring 51 abuts against the inner side wall of the directional hole 53. At the same time, the second positioning inclined surface 172 abuts against the upper end face of the connecting protrusion 52, and the outer side wall of the second sealing ring 51 abuts against the inner side wall of the directional hole 53.

[0076] In use, as shown in Figures 1, 2, and 12 to 14, the male plug sleeve 4 is inserted into the connecting boss 10, and the inserted end of the male plug sleeve 4 passes through the relief hole 111 and enters the connecting sleeve 1. As the male plug sleeve 4 continues to be inserted, the lower end face of the limiting boss 40 first presses the relief slope 112 of the relief hole 111, causing the locking block 11 to be pressed and moved out of the opening groove 101. At this time, the center of the relief hole 111 is located on the central axis of the connecting sleeve 1. As the male plug sleeve 4 continues to extend, it drives the lower valve core 5 to press the second compression spring 62. At this time, the push rod 50 fixed in the female plug sleeve 7 forms a relative movement that pushes the upper valve core 2 upward. As the male plug sleeve 4 extends, the push rod 50... After leaving the directional hole 53 and entering the placement hole 401, the push rod 50 pushes the upper valve core 2 upward, and the first compression spring 61 is squeezed. After the limiting boss 40 moves past the relief slope 112, under the action of the elastic force of the return spring 14, the locking block 11 moves back. The center of the relief hole 111 deviates from the central axis of the connecting sleeve 1. The locking block 11 extends into the limiting groove 42 at the position corresponding to one side of the relief slope 112, and the upper end face of the limiting boss 40 abuts against the lower end face of the locking block 11 to limit the locking of the locking block 11 against the male plug sleeve 4. At the same time, the end face of the male plug sleeve 4 extending into it abuts against the upper end face of the lower valve core 5, and the upper end face of the push rod 50 abuts against the lower end face of the upper valve core 2.

[0077] Then, the locking sleeve 12 is pushed to move towards the connecting boss 10. The third protrusion 145 slides in the "V" shaped through groove 124. The limiting protrusion 17 moves to the upper end of the second protrusion 144 via the inclined section 18. The second protrusion 144 extends into the second strip groove 142 and abuts against the lower end face of the limiting protrusion 17. The locking boss 121 moves into the positioning groove 102. At the same time, the outer wall of the stop boss 122 fits against the outer wall of the positioning boss 114. In this way, the extension section 111 and the connecting sleeve 1 are limited and fixed. Under the action of external force, the extension section 111 cannot drive the locking block 11 to move, which can prevent the locking block 11 from automatically unlocking the male plug sleeve 4. At the same time, the placement hole 401 is connected to the directional hole 53, and the medium can flow smoothly. Since the lower end face of the male plug sleeve 4 is always in contact with the upper end face of the lower valve core 5 during the movement, the medium will not leak.

[0078] During disassembly, pulling the locking sleeve 12 moves it towards the lower housing assembly. The third protrusion 145 slides within the "V"-shaped through groove 124. The limiting protrusion 17 moves via the inclined section 18 to the lower end of the second protrusion 144. The upper end face of the second protrusion 144 abuts against the lower end face of the limiting protrusion 17, which is located below the second protrusion 144. The locking boss 121 moves out of the positioning groove 102, and the stop boss 122 leaves the abutting positioning boss 114. The locking sleeve 12 loses its restriction on the extension section 111, and the locking sleeve 12 abuts against the fixed boss 100 for limitation. In this way, the locking sleeve 12 is limited by the two third protrusions 145 and will not rotate on the outside of the connecting sleeve 1, facilitating rapid movement, orientation, and clamping connection. Next, pressing the extension section 113 compresses the return spring 14, and the extension section 113 pushes the locking block. 11. The center of the clearance hole 111 is located on the central axis of the connecting sleeve 1, so that the limiting boss 40 is fully exposed at the clearance hole 111 position. Then, the connecting sleeve 1 is slowly released, and the male plug sleeve 4 gradually exits the connecting sleeve 1, clearance hole 111, and connecting boss 10 in sequence. The push rod 50 gradually exits the placement hole 401. Under the elastic force of the second compression spring 62, the lower valve core 5 is pushed out of the sleeve 3. At the same time, the first compression spring 61 also drives the upper valve core 2 to abut against the push rod 50 and gradually move towards the insertion end of the male plug sleeve 4. As the lower valve core 5 moves upward, the second sealing ring 51 returns to the directional hole 53, and the outer wall of the second sealing ring 51 fits against the inner wall of the directional hole 53. At the same time, the outer wall of the first sealing ring 20 fits against the hole wall of the placement hole 401. Throughout the process, the upper valve core 2 and the push rod 50 remain in contact.

[0079] Because of the fit and limiting of the transition slope 21 and the limiting slope 403, the upper valve core 2 will not protrude from the placement hole 401, and the first sealing ring 20 and the second sealing ring 51 are both in an internal sealing state, with good sealing stability. In this way, when the upper valve core 2 is separated from the push rod 50, there will be no medium residue or external leakage.

[0080] It should be noted that, as shown in Figures 7 and 13, in order to better prevent the locking block 11 from falling off during the above-mentioned use, two integrally formed anti-reverse protrusions 117 are symmetrically provided on the left and right sides of the locking block 11. The two anti-reverse protrusions 117 respectively abut against the groove wall at the corresponding end of the opening groove 101 for limiting. At the same time, in order to facilitate the installation of the anti-reverse protrusions 117, in addition to the arc surface adapted to the outer side wall of the anti-reverse protrusions 117, the material used is nylon 66 to meet the requirements of moving and bearing pressure during installation.

[0081] To prevent the medium from leaking out at the female plug sleeve 7, a third sealing ring 72 is embedded at the root of the threaded section of the connecting sleeve 1. When the female plug sleeve 7 is screwed onto the connecting sleeve 1, the end face of the screwed end of the female plug sleeve 7 abuts against the end face of the corresponding end of the fixed boss 100, and the inner side wall of the screwed end of the female plug sleeve 7 abuts against the outer side wall of the third sealing ring 72, thus achieving a tight seal during connection.

[0082] Since the push rod 50 is in contact with the medium, and it is usually integrally injection molded with the female plug sleeve 7, the nylon 66 material used in its processing has high water absorption. The push rod 50 will expand after absorbing water, directly causing interference during use and shortening its service life. Therefore, in this embodiment, the push rod 50 and the female plug sleeve 7 are manufactured separately, and the push rod 50 is made of PPS material (low water absorption rate), which simplifies the assembly structure. In this way, without affecting the assembly difficulty, the production structure of the product is simplified, and the service life of the push rod 50 is guaranteed.

[0083] Furthermore, the number of the first protrusion 143, the second protrusion 144, and the third protrusion 145 shown in the illustration of this embodiment is not unique and should be based on the specific product specifications and should be evenly distributed. Embodiments of the present invention

[0084] Example 1

[0085] As shown in Figures 1 to 9, the present invention includes a connecting sleeve 1 movably provided with a locking block 11, an upper housing assembly that engages with the locking block 11, a locking sleeve 12 that is adjustablely sleeved on the outside of the connecting sleeve 1 and abuts against and limits the locking block 11, and a lower housing assembly that is detachably connected to the connecting sleeve 1. The locking block 11 can be horizontally displaced on the connecting sleeve 1, causing the center of the locking block 11 to offset from the center of the connecting sleeve 1. Since the connecting sleeve 1 and the upper housing assembly are coaxially arranged after insertion, when the locking block 11 is horizontally displaced, the center of the locking block 11 offsets from the center of the upper housing assembly, thus locking the upper housing assembly after insertion. When the upper housing assembly and the connecting sleeve 1 need to be unlocked, the locking block 11 resets, and the center of the locking block 11 becomes coaxial with the center of the upper housing assembly, releasing the locking of the upper housing assembly. The upper housing assembly and the connecting sleeve 1 can then be easily separated. The locking sleeve 12 is used to lock or unlock the locking block 11. In use, the upper housing assembly and the lower housing assembly are connected to the ports of the two pipelines respectively, and the upper housing assembly is inserted into the connecting sleeve 1 to achieve the connection between the two pipelines.

[0086] The upper housing assembly is elastically provided with an upper valve core 2, which is located at the insertion end of the upper housing assembly and can move up and down within the upper housing assembly. A first sealing ring 20 is provided on the upper valve core 2, which is located on the outer circumferential surface of the upper valve core 2, allowing the upper valve core 2 to achieve a sealing fit with the upper housing assembly while sliding up and down, thus sealing the insertion end of the upper housing assembly when the upper valve core 2 is not moving. The lower housing assembly is provided with a push rod 50 and... The lower valve core 5 is flexibly configured and has a sleeve structure. The lower valve core 5 is located at the insertion end of the connecting sleeve 1 and is sleeved on the outer side wall of the push rod 50. The lower valve core 5 is connected to the insertion end of the upper housing assembly 4. When the upper housing assembly is inserted into the connecting sleeve 1, the push rod 20 pushes the upper valve core 2 to move, and the connecting sleeve 1 pushes the lower valve core 5 to move. A second sealing ring 51 is provided at the corresponding sleeve position on the push rod 50. The second sealing ring 51 makes the push rod 50 and the lower valve core 5 form a sliding sealing fit. In use, the upper housing assembly presses against the lower valve core 5, causing the lower valve core 5 to move towards the other end of the push rod 50, thus breaking the sealing fit between the upper valve core 5 and the push rod 50. Simultaneously, the push rod 50 pushes out the upper valve core 2, causing the upper valve core 2 to move towards the other end of the upper housing assembly, breaking the sealing fit between the upper valve core 2 and the upper housing assembly, thus establishing a connection between the upper housing assembly and the connecting sleeve 1, and ultimately establishing a connection between the upper housing assembly and the lower housing assembly. Next, the locking block 11 engages with the upper housing assembly to limit its movement, locking the upper housing assembly and the connecting sleeve 1. Then, the adjusting locking sleeve 12 is moved outside the connecting sleeve 1 and abuts against the limiting locking block 11, locking the locking block 11. To prevent the locking block 11 from automatically shifting; when disassembling, adjust and remove the locking sleeve 12, press the locking block 11 to release the locking position, the upper housing assembly and the connecting sleeve 1 are unlocked, and the upper housing assembly can be easily pulled out from the connecting sleeve 1. During this process, under the action of elastic force, the upper valve core 2 gradually loses the thrust of the push rod 50, the upper valve core 2 is reset by elastic force, and the liquid outlet end of the upper housing assembly is sealed with the first sealing ring 20. At the same time, the lower valve core 5 gradually loses the thrust of the upper housing assembly, the lower valve core 5 is reset by elastic force, the lower valve core 5 and the push rod 20 resume sealing cooperation, and the second sealing ring 51 is sealed with the liquid outlet end of the connecting sleeve 1.

[0087] Specifically, a connecting boss 10 is provided at the insertion end of the connecting sleeve 1, and a fixing boss 100 for abutting against the limiting locking sleeve 12 is provided at the other end. The fixing boss 100 is located on the outer circumferential surface of the connecting sleeve 1. A through hole communicating with the connecting sleeve 1 is provided on the connecting boss 10, and the diameter of the through hole is adapted to the opening diameter of the connecting sleeve 1. The locking block 11 is installed in the through hole. An opening groove 101 is provided on the connecting boss 10 at the position corresponding to the locking block 11. The width of the opening groove 101 is adapted to the width of the locking block 11, and the opening groove 101 penetrates the side of the connecting boss 10, so that the locking block 11... 1. The locking block 11 can move outward or inward through the opening slot 101, thereby allowing the center of the locking block 11 to be adjusted relative to the center of the connecting sleeve 1. A positioning slot 102 is provided on the connecting boss 10 at the lower end of the slot corresponding to the opening of the opening slot 101. The positioning slot 102 is located on the side of the connecting boss 10 away from the upper housing assembly. A clearance hole 111 communicating with the through hole is provided on the locking block 11. The clearance hole 111 is elongated and its length direction is consistent with the movement direction of the locking block 11. A clearance slope 112 is provided on one side of the opening of the clearance hole 111.

[0088] In this invention, there may be two opening slots 101, which are located on the same diameter of the connecting sleeve 1. The positioning slot 102 may be located below one of the opening slots 101. Through the cooperation of the two opening slots 101, the locking block 11 can reciprocate to the two opening slots 101, thereby adjusting the relative position of the center of the locking block 11 and the center of the connecting sleeve 1.

[0089] One side of the locking block 11 is provided with an extension section 113 extending out of the connecting boss 10. The extension section 113 extends obliquely toward the locking sleeve 12. The inner wall of the extension section 13 is spaced apart from the outer wall of the connecting sleeve 1. Two positioning bosses 114 are symmetrically provided on the inner side wall of the extension section 113. The length direction of the positioning bosses 114 is consistent with the length direction of the extension section 113, so that the two positioning bosses 114 are spaced apart in the width direction of the extension section 113. A first placement groove 115 is provided on the extension section 113 at the position between the two positioning bosses 114. A first guide post 131 is provided in the first placement groove 115. There is a certain distance between the outer circular surface of the first guide post 131 and the groove wall of the first placement groove 115. The first guide post 131 is higher than the inner surface of the extension section 113. A return spring 14 is provided in the first placement groove 115 and sleeved on the outside of the first guide post 131. One end of the return spring 14 abuts against the bottom of the first placement groove 115, and the other end of the return spring 14 extends out and points to the connecting sleeve 1. This not only realizes the connection between the return spring 14 and the extension section 113, but also effectively prevents the return spring 14 from being displaced on the extension section 113. Meanwhile, a second placement groove 116 is provided on the outer wall of the connecting sleeve 1 at the position corresponding to the opening through groove 120. A second guide post 132 is provided in the second placement groove 116. There is a certain distance between the outer circular surface of the second guide post 132 and the groove wall of the second placement groove 116. The first guide post 132 is higher than the outer surface of the connecting sleeve 1. The protruding end of the reset spring 14 is sleeved on the outside of the second guide post 132 and abuts against the bottom of the second placement groove 116. This not only realizes the connection between the reset spring 14 and the connecting sleeve 1, but also effectively prevents the reset spring 14 from being displaced on the connecting sleeve 1.

[0090] Meanwhile, a locking boss 121 is provided on one side of the locking sleeve 12 at the position corresponding to the positioning groove 102. The locking boss 121 engages with the positioning groove 102. An open through groove 120 is provided on the other side of the locking sleeve 12. A stop boss 122 is provided at the position of the opening of the open through groove 120 corresponding to the position of the positioning boss 114. The axial direction of the stop boss 122 is consistent with the length direction of the open through groove 120, and the stop boss 122 protrudes into the inner wall of the locking sleeve 12. Each stop boss 122 has a vertical "V" shaped protrusion penetrating the inner wall of the locking sleeve 12 on its inner sidewall. The "V"-shaped through groove 124 has one groove surface as the inner surface of the connecting sleeve 1 and the other groove surface as the side of the stop boss 122 away from the opening through groove 120. The outer wall of the stop boss 122 at the corresponding end fits and abuts against the outer wall of the positioning boss 114, so that the end of the locking sleeve 12 near the connecting boss 10 is stuck between the inner wall of the connecting section 113 and the outer wall of the connecting sleeve 1, thus restricting the connecting section 113. At this time, the connecting section 113 cannot be pressed, that is, the locking block 11 cannot be moved by pressing the connecting section 113, so that the position of the locking block 11 is locked. An opening is provided on the outer wall of the locking sleeve 12. A lever 123 is integrally connected within the opening. A first groove 141 is formed between the left and right sides of the lever 123 and the wall of the opening. A second groove 142 is formed between the non-connecting end of the lever 123 and the wall of the opening. The two ends of the second groove 142 are respectively connected to the two first grooves 141. A limiting protrusion 17 is provided on the inner wall of the lever 123. The limiting protrusion 17 is located at the non-connecting end of the lever 123, and the two end faces of the limiting protrusion 17 corresponding to the two ends of the connecting sleeve 1 are both beveled, so that the side of the limiting protrusion 17 is triangular or isosceles trapezoidal. A first groove 141 is formed between the left and right sides of the lever 123 and the wall of the opening. A first protrusion 143 is provided that fits against the inner wall of the locking sleeve 12, and a second protrusion 144 is provided on the outer wall of the connecting sleeve 1 at the position corresponding to the second strip groove 142. The two end faces of the second protrusion 144 and the two ends of the connecting sleeve 1 are both inclined, so that the side of the second protrusion 144 is triangular or isosceles trapezoidal. The lower end face of the second protrusion 144 fits against the upper end face of the limiting protrusion 17. A third protrusion 145 is provided on the connecting sleeve 1 at the position corresponding to the stop protrusion 122. The third protrusion 145 extends into the "V" shaped through groove 124 for limiting. By having multiple third protrusions 145 respectively engage with two "V" shaped through grooves 124, the locking sleeve 12 is prevented from rotating or shifting on the connecting sleeve 1.

[0091] In this invention, there can be multiple paddles 123, which are spaced apart along the circumferential direction of the locking sleeve 12. When there are multiple paddles 123, each paddle 123 can be provided with a limiting protrusion 17. In this case, there are also multiple second protrusions 144 on the inner wall of the connecting sleeve 1 corresponding to the limiting protrusions 17. In this invention, in order to facilitate the support of the locking sleeve 12, there can also be multiple first protrusions 143 on the outer wall of the connecting sleeve 1, and the multiple first protrusions 143 are set into multiple groups. The multiple first protrusions 143 in each group are arranged along the circumferential direction of the locking sleeve 12. The connecting sleeve 1 is arranged at intervals along its length, while multiple sets of first protrusions 143 are arranged at intervals along the circumference of the connecting sleeve 1. In this invention, the protrusion heights of the first protrusion 143, second protrusion 144, and third protrusion 145 on the connecting sleeve 1 can be equal. In this invention, there can be only two third protrusions 145 that engage with the two "V" shaped through grooves 124 respectively. The third protrusions 145 that engage with the two "V" shaped through grooves 124 respectively can also be divided into two groups, and multiple third protrusions 145 in the same group are arranged at intervals along the length of the connecting sleeve 1.

[0092] The upper housing assembly includes a male plug sleeve 4, on which an axially penetrating placement hole 401 is provided. A directional boss 41 is provided at one end of the outer side of the male plug sleeve 4, and a limiting boss 40 is provided at the other end of the outer side of the male plug sleeve 4. The diameter of the limiting boss 40 is adapted to the opening diameter of the connecting sleeve 1, so that the limiting boss 40 can be inserted into the connecting sleeve 1. The side of the limiting boss 40 near the lower housing assembly is a conical surface, which is adapted to the relief slope 112 on the locking block 11. During the process of inserting the male plug sleeve 4 into the connecting sleeve 1, through the cooperation of the conical surface and the relief slope 112, the conical surface on the limiting boss 40 can push the locking block 11 to move, ensuring that the center of the relief hole 11 is in a straight line with the center of the connecting sleeve 1. A limiting groove 42 is provided on the male plug sleeve 4 at the position between the directional boss 41 and the limiting boss 40. The width of the limiting groove 42 is greater than the thickness of the locking block 11, so that the locking block 11 can be inserted into the limiting groove 42. A first compression spring 61 is provided in the placement hole 401. A backstop ring 402 is fixedly provided at one end of the placement hole 401 away from the connecting sleeve 1. One end of the first compression spring 61 is fixedly connected to the backstop ring 402 fixed in the placement hole 401, and the other end of the first compression spring 61 is fixedly connected to the upper valve core 2. The first sealing ring 20 on the upper valve core 2 is sealed and fitted with the hole wall of the placement hole 401. During installation, the male plug sleeve 4 extends into the connecting sleeve 1 and passes through the clearance hole 111 and the locking block 11. When the male plug sleeve 4 is connected to the connecting sleeve 1, the limiting groove 42 corresponds to the locking block 11. When the locking block 11 is moved, the locking block 11 is inserted into the limiting groove 42. The end face of the limiting boss 40 near the limiting groove 42 abuts against the lower end face of the locking block 11 to limit the locking of the male plug sleeve 4.

[0093] A transition slope 21 is provided around the outer side wall of the upper valve core 2. The transition slope 21 gradually slopes outward while moving away from the connecting sleeve 1. There are multiple transition slopes 21, and the multiple transition slopes 21 are arranged at intervals along the circumferential direction of the upper valve core 2.

[0094] A limiting slope 403 is provided on the wall of the placement hole 401 at the position corresponding to the transition slope 21. The limiting slope 403 fits with the transition slope 21, which can effectively prevent the upper valve core 2 from detaching from the male plug sleeve 4. When the first compression spring 61 is not under pressure, the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the orifice of the corresponding end of the placement hole 401, that is, the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the protruding end of the male plug sleeve 4.

[0095] The lower housing assembly also includes a female plug sleeve 7 that is screwed onto the connecting sleeve 1. A stepped hole 15 is provided within the connecting sleeve 1. The diameter of the stepped hole 15 at the end furthest from the upper housing assembly is larger than the diameter at the end closest to the upper housing assembly. The end of the push rod 50 furthest from the lower valve core 5 is fixed within the female plug sleeve 7, and the end of the push rod 50 inserted into the lower valve core 5 is located at the small end of the stepped hole 15. The valve core 5 has an internal directional hole 53. The insertion end of the push rod 50 is fitted into the directional hole 53 of the lower valve core 5, and the insertion end of the push rod 50 is the end furthest from the female plug sleeve 7. The insertion end of the push rod 50 is sealed to the directional hole 53. An installation groove 71 is provided within the female plug sleeve 7 at a position corresponding to the connection sleeve 1. The groove 71 is located at the end of the push rod 50 furthest from the lower valve core 5. A mounting ring 54 is connected, and the mounting ring 54 has a through hole connecting the female plug sleeve 7 and the connecting sleeve 1. The mounting ring 54 is fitted and fixed in the mounting groove 71 and pressed and fixed by the end of the connecting sleeve 1 away from the upper housing assembly. A second compression spring 62 is also fitted on the outside of the push rod 50. A connecting protrusion 52 is wrapped around the lower valve core 5 in the circumferential direction near the female plug sleeve 7. One end of the second compression spring 62 is fitted on the lower valve core 5 and abuts against the lower end face of the connecting protrusion 52. The other end of the second compression spring 62 abuts against the mounting ring 54. A second sealing ring 51 is embedded on the outer wall of the extension end of the push rod 50. The second sealing ring 51 fits and abuts against the inner wall of the directional hole 53, so that when the extension end of the push rod 50 is located in the lower valve core 5, the extension end of the push rod 50 can block the directional hole 53.

[0096] A transition hole 16 is provided between the through hole on the connecting boss 10 and the stepped hole 15. A sleeve 3 is sleeved on the outside of the second compression spring 62. The sleeve 3 is located at the large end of the stepped hole 15. The outer wall of the sleeve 3 mates with the inner wall of the connecting sleeve 1, and the inner wall of the sleeve 3 mates with the connecting protrusion 52 on the lower valve core 5. The insertion end of the sleeve 3 is the end of the sleeve 3 closest to the connecting boss 10. The end face of the insertion end of the sleeve 3 is between the bottom of the stepped hole 15 and the bottom of the stepped hole 15. An upper sealing ring 63, an isolation ring 60, and a lower sealing ring 64 are stacked sequentially from the bottom of the hole to the end face of the extension end of the sleeve 3. The upper end face of the upper sealing ring 63 abuts against the bottom of the stepped hole 15, and the lower end face of the lower sealing ring 64 abuts against the end face of the extension end of the sleeve 3. When the second compression spring 62 is not compressed, the isolation ring 60 is sleeved on the outside of the lower valve core 5. The end of the sleeve 3 away from the connecting boss 10 is the outside, and the outer end face of the sleeve 3 abuts against the inner wall of the mounting ring 54.

[0097] The stepped surface of the stepped hole 15 is a sloping structure that is narrower at the top and wider at the bottom. That is, the large end of the stepped hole 15 and the small end of the stepped hole 15 are transitioned by the sloping structure. A first positioning sloping surface 171 is provided on the outer side wall of the sleeve 3 at the position corresponding to the stepped surface of the stepped hole 15, so that the sleeve 3 is stably installed in the large end of the stepped hole 15 and the sleeve 3 is prevented from being displaced at the large end of the stepped hole 15. A second positioning sloping surface 172 is provided on the inner side wall of the sleeve 3 at the position corresponding to the first positioning sloping surface 171. The second positioning sloping surface 172 cooperates with the connecting protrusion 52 on the lower valve core 5, so that the lower valve core 5 cannot be moved out from the end of the sleeve 3 near the connecting protrusion 10, thus preventing the lower valve core 5 from detaching from the connecting sleeve 1. During installation, the sleeve 3 extends into the stepped hole 15, and the end face of the sleeve 3 extends into it abuts against the lower end face of the lower sealing ring 64. The first positioning inclined surface 171 fits against the stepped surface of the stepped hole 15, and the second positioning inclined surface 172 fits against the upper end face of the connecting protrusion 52.

[0098] Since the sides of the second protrusion 144 and the limiting protrusion 17 are triangular or isosceles trapezoidal, both the second protrusion 144 and the limiting protrusion 17 are provided with inclined sections 18 to facilitate the movement and repositioning of the locking sleeve 12. One inclined section 18 is the side of the limiting protrusion 17 away from the lower housing assembly, and the other inclined section 18 is the side of the limiting protrusion 17 close to the second strip groove 142. This design makes it more convenient for the locking sleeve 12 to lock and unlock the locking block 11 when needed.

[0099] The working principle of this invention is as follows:

[0100] As shown in Figures 1 to 4, 9, and 14, before use, firstly, use a tool to open the opening slot 120 on the locking sleeve 12, that is, increase the inner diameter of the locking sleeve 12. Then, starting from the lower end of the connecting sleeve 1, slide the locking sleeve 12 onto the outside of the connecting sleeve 1 from bottom to top. Since the locking sleeve 12 is made of nylon 66 material, when it is fully inserted, the opening of the slot 120 springs back to its original width before being opened. At this time, the first protrusion... The outer wall of 143 fits against the inner wall of the locking sleeve 12. The third protrusion 145 extends into the "V" shaped through groove 124. The outer wall of the third protrusion 145 fits against the groove wall of the "V" shaped through groove 124. The lower end of the locking sleeve 12 abuts against the fixed protrusion 100 and limits its movement. At the same time, the lower end face of the second protrusion 144 fits against the upper end face of the limiting protrusion 17 and exposes the second placement groove 116 at the position of the opening through groove 120.

[0101] Next, the locking block 11 is inserted into the through hole of the connecting boss 10 through the opening slot 101, and the plane of the outer wall of the opening slot 101 is flush with the plane of the outer wall of the locking block 11. The center of the clearance hole 111 on the locking block 11 is on the same straight line as the center of the connecting sleeve 1. At the same time, one end of the return spring 14 abuts against the bottom of the first placement slot 115, and the other end of the return spring 14 abuts against the bottom of the second placement slot 116. In this way, the locking block 11 is movably set on the connecting sleeve 1.

[0102] Furthermore, in the male plug sleeve 4, one end of the first compression spring 61 is fixedly connected to the anti-reverse ring 402, and the other end of the first compression spring 61 is fixedly connected to the upper valve core 2. A first sealing ring 20 is embedded in the outer wall of the upper valve core 2. The outer wall of the first sealing ring 20 fits against the hole wall of the placement hole 401, so that the upper valve core 2 seals the placement hole 401. At the same time, the limiting inclined surface 403 fits against the transition inclined surface 21, and the end face of the non-connecting end of the upper valve core 2 is flush with the end face of the corresponding end of the placement hole 401.

[0103] Next, as shown in Figures 1, 2, and 5 to 11, the upper sealing ring 63, the isolation ring 60, and the lower sealing ring 64 are sequentially placed in the stepped hole 15. The outer walls of the upper sealing ring 63 and the lower sealing ring 64 abut against the small hole end wall of the stepped hole 15. Then, the sleeve 3 is placed in, and the upper end face of the upper sealing ring 63 abuts against the bottom of the stepped hole 15. The lower end face of the lower sealing ring 64 abuts against the end face of the sleeve 3. The lower valve core 5 is placed in the sleeve 3. The end of the lower valve core 5 near the connecting boss 10 extends out of the sleeve 3 and is inserted into the isolation ring 60 and the lower sealing ring 64. Then, the second compression spring 62 is placed in.

[0104] Then, the mounting ring 54 on the push rod 50 is fitted and fixed in the mounting groove 71, the push rod 50 is placed vertically, and the second compression spring 62 is fitted on the push rod 50. Next, the female plug sleeve 7 is connected to the connecting sleeve 1, and one end of the second compression spring 62 abuts against the lower end face of the connecting protrusion 52, and the other end of the second compression spring 62 abuts against the inner side wall of the mounting ring 54. At the same time, the outer end face of the sleeve 3 abuts against the inner side wall of the mounting ring 54. At this time, the push rod 50 extends into the directional hole 53 through the second compression spring 62, and the outer side wall of the second sealing ring 51 abuts against the inner side wall of the directional hole 53. At the same time, the second positioning inclined surface 172 abuts against the upper end face of the connecting protrusion 52, and the outer side wall of the second sealing ring 51 abuts against the inner side wall of the directional hole 53.

[0105] In use, as shown in Figures 1, 2, and 12 to 14, the male plug sleeve 4 is inserted into the connecting boss 10, and the inserted end of the male plug sleeve 4 passes through the relief hole 111 and enters the connecting sleeve 1. As the male plug sleeve 4 continues to be inserted, the lower end face of the limiting boss 40 first presses the relief slope 112 of the relief hole 111, causing the locking block 11 to be pressed and moved out of the opening groove 101. At this time, the center of the relief hole 111 is located on the central axis of the connecting sleeve 1. As the male plug sleeve 4 continues to extend, it drives the lower valve core 5 to press the second compression spring 62. At this time, the push rod 50 fixed in the female plug sleeve 7 forms a relative movement that pushes the upper valve core 2 upward. As the male plug sleeve 4 extends, the push rod 50... After leaving the directional hole 53 and entering the placement hole 401, the push rod 50 pushes the upper valve core 2 upward, and the first compression spring 61 is squeezed. After the limiting boss 40 moves past the relief slope 112, under the action of the elastic force of the return spring 14, the locking block 11 moves back. The center of the relief hole 111 deviates from the central axis of the connecting sleeve 1. The locking block 11 extends into the limiting groove 42 at the position corresponding to one side of the relief slope 112, and the upper end face of the limiting boss 40 abuts against the lower end face of the locking block 11 to limit the locking of the locking block 11 against the male plug sleeve 4. At the same time, the end face of the male plug sleeve 4 extending into it abuts against the upper end face of the lower valve core 5, and the upper end face of the push rod 50 abuts against the lower end face of the upper valve core 2.

[0106] Then, the locking sleeve 12 is pushed to move towards the connecting boss 10. The third protrusion 145 slides in the "V" shaped through groove 124. The limiting protrusion 17 moves to the upper end of the second protrusion 144 via the inclined section 18. The second protrusion 144 extends into the second strip groove 142 and abuts against the lower end face of the limiting protrusion 17. The locking boss 121 moves into the positioning groove 102. At the same time, the outer wall of the stop boss 122 fits against the outer wall of the positioning boss 114. In this way, the extension section 111 and the connecting sleeve 1 are limited and fixed. Under the action of external force, the extension section 111 cannot drive the locking block 11 to move, which can prevent the locking block 11 from automatically unlocking the male plug sleeve 4. At the same time, the placement hole 401 is connected to the directional hole 53, and the medium can flow smoothly. Since the lower end face of the male plug sleeve 4 is always in contact with the upper end face of the lower valve core 5 during the movement, the medium will not leak.

[0107] During disassembly, pulling the locking sleeve 12 moves it towards the lower housing assembly. The third protrusion 145 slides within the "V"-shaped through groove 124. The limiting protrusion 17 moves via the inclined section 18 to the lower end of the second protrusion 144. The upper end face of the second protrusion 144 abuts against the lower end face of the limiting protrusion 17, which is located below the second protrusion 144. The locking boss 121 moves out of the positioning groove 102, and the stop boss 122 leaves the abutting positioning boss 114. The locking sleeve 12 loses its restriction on the extension section 111, and the locking sleeve 12 abuts against the fixed boss 100 for limitation. In this way, the locking sleeve 12 is limited by the two third protrusions 145 and will not rotate on the outside of the connecting sleeve 1, facilitating rapid movement, orientation, and clamping connection. Next, pressing the extension section 113 compresses the return spring 14, and the extension section 113 pushes the locking block. 11. The center of the clearance hole 111 is located on the central axis of the connecting sleeve 1, so that the limiting boss 40 is fully exposed at the clearance hole 111 position. Then, the connecting sleeve 1 is slowly released, and the male plug sleeve 4 gradually exits the connecting sleeve 1, clearance hole 111, and connecting boss 10 in sequence. The push rod 50 gradually exits the placement hole 401. Under the elastic force of the second compression spring 62, the lower valve core 5 is pushed out of the sleeve 3. At the same time, the first compression spring 61 also drives the upper valve core 2 to abut against the push rod 50 and gradually move towards the insertion end of the male plug sleeve 4. As the lower valve core 5 moves upward, the second sealing ring 51 returns to the directional hole 53, and the outer wall of the second sealing ring 51 fits against the inner wall of the directional hole 53. At the same time, the outer wall of the first sealing ring 20 fits against the hole wall of the placement hole 401. Throughout the process, the upper valve core 2 and the push rod 50 remain in contact.

[0108] Because of the fit and limiting of the transition slope 21 and the limiting slope 403, the upper valve core 2 will not protrude from the placement hole 401, and the first sealing ring 20 and the second sealing ring 51 are both in an internal sealing state, with good sealing stability. In this way, when the upper valve core 2 is separated from the push rod 50, there will be no medium residue or external leakage.

[0109] It should be noted that, as shown in Figures 7 and 13, in order to better prevent the locking block 11 from falling off during the above-mentioned use, two integrally formed anti-reverse protrusions 117 are symmetrically provided on the left and right sides of the locking block 11. The two anti-reverse protrusions 117 respectively abut against the groove wall at the corresponding end of the opening groove 101 for limiting. At the same time, in order to facilitate the installation of the anti-reverse protrusions 117, in addition to the arc surface adapted to the outer side wall of the anti-reverse protrusions 117, the material used is nylon 66 to meet the requirements of moving and bearing pressure during installation.

[0110] To prevent the medium from leaking out at the female plug sleeve 7, a third sealing ring 72 is embedded at the root of the threaded section of the connecting sleeve 1. When the female plug sleeve 7 is screwed onto the connecting sleeve 1, the end face of the screwed end of the female plug sleeve 7 abuts against the end face of the corresponding end of the fixed boss 100, and the inner side wall of the screwed end of the female plug sleeve 7 abuts against the outer side wall of the third sealing ring 72, thus achieving a tight seal during connection.

[0111] Since the push rod 50 is in contact with the medium, and it is usually integrally injection molded with the female plug sleeve 7, the nylon 66 material used in its processing has high water absorption. The push rod 50 will expand after absorbing water, directly causing interference during use and shortening its service life. Therefore, in this embodiment, the push rod 50 and the female plug sleeve 7 are manufactured separately, and the push rod 50 is made of PPS material (low water absorption rate), which simplifies the assembly structure. In this way, without affecting the assembly difficulty, the production structure of the product is simplified, and the service life of the push rod 50 is guaranteed.

[0112] Furthermore, the number of the first protrusion 143, the second protrusion 144, and the third protrusion 145 shown in the illustration of this embodiment is not unique and should be based on the specific product specifications and should be evenly distributed. Example

[0113] The difference between Example 2 and Example 1 is that:

[0114] The locking sleeve 12 uses a different locking method for the locking block 11, and the positioning groove 102 on the connecting boss 10 is eliminated, resulting in a redesigned structure for the locking sleeve 12. Specifically, as shown in Figures 15 to 18, the locking sleeve 12 has a tubular structure and is fitted onto the connecting sleeve 1. The locking sleeve 12 and the connecting sleeve 1 are in a clearance fit, allowing the locking sleeve 12 to rotate fully on the connecting sleeve 1. The outer wall of the locking sleeve 12 is also provided with a stop protrusion 120'. The position of the stop protrusion 120' in the length direction of the locking sleeve 12 corresponds to the extension section 113. That is, by rotating the locking sleeve 12, the stop protrusion 120' can enter between the inner wall of the extension section 113 and the outer wall of the locking sleeve 12, or the stop protrusion 120' can be offset from the extension section 113 by rotating the locking sleeve 12. When the stop protrusion 120' enters between the inner wall of the extension section 113 and the outer wall of the locking sleeve 12, the stop protrusion 120' can press against the extension section 113, preventing the extension section 113 from being pressed. This prevents the locking block 11 from losing its lock on the upper housing assembly due to accidental contact with the extension section 113, thus ensuring the lock between the upper housing assembly and the locking block 11. When the stop protrusion 120' is misaligned with the extension section 113, the stop protrusion 120' loses its pressing against the extension section 113. At this time, the extension section 113 can be pressed normally. By pressing the extension section 113, the locking block 11 can be pushed, allowing the upper housing assembly and the connecting sleeve 1 to be unlocked normally.

[0115] To prevent the locking sleeve 12 from rotating due to vibration or other reasons after the stop protrusion 120' enters between the extension section 113 and the locking sleeve 12, the locking sleeve 12 and the connecting sleeve 1 are equipped with an anti-rotation structure. The anti-rotation structure can restrict the rotation of the locking sleeve 12 by allowing the stop protrusion 120' to enter between the extension section 113 and the locking sleeve 12 through the rotation of the locking sleeve 12, thereby preventing the locking sleeve 12 from losing its locking on the locking block 11 and ensuring the locking effect of the locking block 11.

[0116] In this utility model, the anti-rotation structure includes an elastic lever 121' disposed on the locking sleeve 12. The elastic lever 121' and the locking sleeve 12 are an integral structure. The elastic lever 121' can swing slightly outward or inward on the locking sleeve 12 due to external force. Specifically, regarding the setting of the elastic lever 121', an L-shaped groove can be opened at one end of the locking sleeve 12 near the locking block 11. One end of the L-shaped groove extends along the axial direction of the locking sleeve 12 and passes through the end face of the locking sleeve 12 near the locking block 11. The other end of the L-shaped groove extends along the circumference of the locking sleeve 12. At this time, one side of the elastic lever 121' is flush with the end face of the locking sleeve 12 near the locking block 11. Alternatively, a U-shaped groove can be opened at one end of the locking sleeve 12 near the locking block 11. Both ends of the U-shaped groove extend along the circumference of the locking sleeve 12, and the middle section of the U-shaped groove extends along the axial direction of the locking sleeve 12. One side of the elastic lever 121' is connected to the locking sleeve 12, and the other three sides of the elastic lever 121' are separated from the locking sleeve 12 by a certain distance through the U-shaped groove. Regardless of how the elastic lever 121' is formed on the locking sleeve 12, only one side of the elastic lever 121' is connected to the locking sleeve 12, and the side of the elastic lever 121' connected to the locking sleeve 12 is the connecting end of the elastic lever 121', while the end of the elastic lever 121' away from the connecting end of the elastic lever 121' is the extension end of the elastic lever 121'.

[0117] The inner wall of the elastic lever 121' also has a protrusion, which is close to the extension end of the elastic lever 121'. The outer wall of the connecting sleeve 1 has a protruding ridge 100'. During the rotation of the locking sleeve 12, the stop protrusion 120' on the locking sleeve 12 gradually enters between the locking sleeve 12 and the extension section 113. The protrusion on the elastic lever 121' gradually approaches the protruding ridge 100'. When the protrusion contacts the protruding ridge 100', the locking sleeve 12 continues to rotate. The protrusion on the elastic lever 121' will be squeezed by the protruding ridge 100', causing the extension end of the elastic lever 121' to swing outward of the locking sleeve 12. As the locking sleeve 12 continues to rotate, the protrusion on the elastic lever 121' crosses the protruding ridge 100' and abuts against it. After the protrusion crosses the protruding ridge 100', the elastic lever 121' loses the squeezing force towards the outside of the locking sleeve 12, and the elastic lever 121' returns to its original position. By engaging the protrusion and the ridge 100', the locking sleeve 12 rotates into position and then cannot rotate without external force, thus restricting its rotation.

[0118] To ensure that the protrusion of the locking sleeve 12 can smoothly cross the ridge 100' during rotation, and to better prevent the locking sleeve 12 from rotating, both the protrusion and the ridge 100' can be elongated. Both the protrusion and the ridge 100' extend along the axial direction of the locking sleeve 12, and the end face of the protrusion and the end face of the ridge 100' are triangular or trapezoidal. The side of the protrusion away from the elastic lever 121' and the side of the ridge 100' away from the connecting sleeve 12 are both arc surfaces, or the side of the protrusion away from the elastic lever 121' and the two sides of the protrusion, and the side of the ridge 100' away from the connecting sleeve 1 and the two sides of the ridge 100' are all rounded, so that the protrusion crosses the ridge 100' more smoothly.

[0119] As shown in Figure 18, since the engagement of the protrusion and the ridge 100' can only restrict the rotation of the locking sleeve 12 after it has rotated, in order to prevent the stop protrusion 120' from misaligning with the extension section 113 due to the continued rotation of the locking sleeve 12 after it has entered between the locking sleeve 12 and the connecting section 113, the anti-rotation structure also includes a first protrusion 123' installed on the outer wall of the locking sleeve 12 and a second protrusion 101' located on the outer wall of the connecting sleeve 1, so as to lock... The locking sleeve 12 rotates in the forward direction. The first boss 123' is located in front of the second boss 101'. After the locking sleeve 12 rotates until the stop boss 120' enters between the locking sleeve 12 and the extension section 113, the first boss 123' blocks the second boss 101', preventing the locking sleeve 12 from continuing to rotate. This avoids the locking sleeve 12 from continuing to rotate after the stop boss 120' enters between the locking sleeve 12 and the extension section 113.

[0120] In this invention, the connecting sleeve 1 is a stepped shaft. Compared to the connecting sleeve 1 in Embodiment 1, the fixed boss 100 is eliminated, and the locking sleeve 12 is fitted onto the small-diameter end of the connecting sleeve 1. After the lower housing assembly is connected to the connecting sleeve 1, one end of the locking sleeve 12 engages with the stepped surface of the connecting sleeve 1, while the other end engages with the lower housing assembly, thereby restricting the axial movement of the locking sleeve 12 on the connecting sleeve 1. Since the fixed boss 100 is eliminated from the design of the connecting sleeve 1, in order to ensure the sealing performance of the lower housing assembly and the connecting sleeve 1, the lower housing assembly and the connecting sleeve 1 can be fixed by welding; of course, if the connection stability between the lower housing assembly and the connecting sleeve 1 is not considered, the lower housing assembly and the connecting sleeve 1 can still be connected by threads.

[0121] In this utility model, since one end of the locking sleeve 12 is restricted by the lower housing assembly, the second boss 101' can also be located on the lower housing assembly when the locking sleeve 12 cannot continue to rotate after the stop protrusion 120' enters between the locking sleeve 12 and the extension section 113. At this time, the first boss 123' is located at the end of the locking sleeve 12 near the lower housing assembly. This design can also prevent the locking sleeve 12 from continuing to rotate after it has been rotated to the correct position.

[0122] In this invention, to facilitate the abutment of the stop protrusion 120' against the extension section 113, a second arc surface 102' is provided on the inner wall of the extension section 113. The two ends of the second arc surface 102' penetrate the two sides of the extension section 113 respectively. The second arc surface 102' can be a surface protruding from the inner surface of the extension section 113, or it can be a concave surface on the inner surface of the extension section 113. Simultaneously, the stop protrusion 120' has a first arc surface 124' that matches the second arc surface 102'. To facilitate the smooth entry of the stop protrusion 120' into the extension section 113 and the locking sleeve 12 during rotation, the second arc surface 102' and the first arc surface 124' are in a clearance fit. Alternatively, an arc chamfer or guide slope can be provided at both ends of the stop protrusion 120'.

[0123] In order to prevent the return spring 14 connected between the inner wall of the extension section 113 and the outer wall of the connecting sleeve 1 from affecting the rotation of the locking sleeve, the locking sleeve 12 is also provided with an opening 125' for avoiding the return spring 14. The opening 125' extends along the circumferential direction of the locking sleeve 12.

[0124] As shown in Figure 17, to allow for immediate observation of the locking status of the locking block, a mark 126' can be provided on both the extension section 113 and the locking sleeve 12. When the locking sleeve 12 rotates so that the stop protrusion 120' is located between the locking sleeve 12 and the extension section 113, the mark 126' on the extension section 113 is aligned with the mark 126' on the locking sleeve 12. When the locking sleeve 12 is not rotated to the fixed position, the mark 126' on the extension section 113 and the mark 126' on the locking sleeve 12 are misaligned. In this invention, the mark 126' can be an arrow, an indicator line, etc.

[0125] In this utility model, in order to facilitate the rotation of the locking sleeve 12, anti-slip texture can also be provided on the locking sleeve 12.

[0126] In this utility model, during assembly, first, the locking sleeve 12 is fitted onto the connecting sleeve 1, then the return spring 14 is placed inside the extension section 113, and the locking block 11 is inserted into the connecting sleeve 1. Next, the assembled lower housing assembly is fitted onto the connecting sleeve 1 and the lower housing assembly is fixed to the connecting sleeve 1. Finally, the assembled upper housing assembly is inserted into the connecting sleeve 1.

[0127] In use, after the locking block locks the upper housing assembly and connecting sleeve 1, the locking sleeve 12 is rotated. During rotation, the stop protrusion 120' gradually enters the inner side of the extension section 113. Continuing to rotate the locking sleeve 12, when the protrusion on the elastic lever 121' abuts against the convex ridge 100' on the connecting sleeve, further rotation of the locking sleeve 12 causes the protrusion on the elastic lever 121' to be squeezed by the convex ridge 100', causing the extension end of the elastic lever 121' to swing outwards from the locking sleeve 12. As the locking sleeve 12 continues to rotate, the protrusion on the elastic lever 121' crosses the ridge 100' and abuts against it. After crossing the ridge 100', the protrusion loses the squeezing force on the outside of the locking sleeve 12, the elastic lever 121' returns to its original position, and the stop protrusion 120' enters between the extension section 113 and the locking sleeve 12. At this time, the first boss 123' and the second boss 101' cooperate to restrict the locking sleeve 12 from continuing to rotate, and the protrusion and the ridge 100' cooperate to restrict the locking sleeve 12 from rotating back. Industrial applicability

[0128] This invention not only prevents the locking block from automatically unlocking when the lower housing assembly and the upper housing assembly are connected, but also allows the upper housing assembly to automatically pop out when the locking block unlocks. At the same time as the upper housing assembly pops out, the upper housing assembly and the lower housing assembly can be sealed immediately, achieving the purpose of disassembly without leakage. It has good industrial applicability.

Claims

1. A snap-fit ​​locking connector, characterized in that: Includes a connecting sleeve (1) with a locking block (11) and a lock. The upper housing assembly is engaged with the stop block (11), the locking sleeve (12) is adjustablely fitted onto the outside of the connecting sleeve (1) and abuts against the locking block (11) for limiting, and the lower housing assembly is detachably connected to the connecting sleeve (1). An upper valve core (2) is elastically provided in the upper housing assembly, and a first sealing ring (20) is provided on the upper valve core (2). A push rod (50) and an elastically provided lower valve core (5) are provided in the lower housing assembly. The lower valve core (5) is fitted onto the outer side wall of the push rod (50), and a second sealing ring (51) is provided on the push rod (50) at the corresponding fitting position. In use, the upper... The housing assembly squeezes the lower valve core (5) and causes the push rod (50) to push out the upper valve core (2), so that the upper housing assembly and the lower housing assembly are connected and the upper housing assembly is locked by the locking block (11). Then, the locking sleeve (12) is moved and adjusted on the outside of the connecting sleeve (1) and abuts against the limiting locking block (11). When disassembling, the locking sleeve (12) is adjusted and moved away, and the locking block (11) is pressed to release the locking position. Under the action of elastic force, the upper valve core (2) pushes back the push rod (50), and the liquid outlet end of the upper housing assembly is sealed with the first sealing ring (20), and the second sealing ring (51) is sealed with the liquid outlet end of the lower housing assembly.

2. The snap-fit ​​locking connector as described in claim 1, characterized in that: A connecting boss (10) is provided on one side of the connecting sleeve (1), and a fixing boss (100) is provided on the other side to abut against the limiting locking sleeve (12). A through hole communicating with the connecting sleeve (1) is provided on the connecting boss (10), and a locking block (11) is provided in the through hole. An opening groove (101) is provided on the connecting boss (10) at the position corresponding to the locking block (11). A positioning groove (102) is provided on the connecting boss (10) at the lower end of the groove corresponding to the opening of the opening groove (101). A clearance hole (111) communicating with the through hole is provided on the locking block (11), and a clearance slope (112) is provided on one side of the opening of the clearance hole (111). One side of the block (11) is provided with an extension section (113) extending out of the connecting boss (10). Two positioning bosses (114) are symmetrically provided on the inner side wall of the extension section (113). A first placement groove (115) is provided on the extension section (113) at the position corresponding to the two positioning bosses (114). A first guide post (131) is provided in the first placement groove (115). A return spring (14) is provided in the first placement groove (115) and sleeved on the outside of the first guide post (131). One end of the return spring (14) abuts against the bottom of the first placement groove (115), and the other end extends out and abuts against the corresponding position on the connecting sleeve (1).

3. The snap-fit ​​locking connector as described in claim 2, characterized in that: A locking boss (121) is provided on one side of the locking sleeve (12) at the position corresponding to the positioning groove (102), and an open through groove (120) is provided on the other side. A stop boss (122) is provided at the position of the opening of the through groove (120) corresponding to the position of the positioning boss (114). A "V" shaped through groove (124) penetrating the inner wall of the locking sleeve (12) is provided on the inner side wall of each stop boss (122). The outer side wall of the stop boss (122) at the corresponding end is in close contact with the outer side wall of the positioning boss (114). An opening is also provided on the outer side wall of the locking sleeve (12). A lever (123) is integrally connected in the opening. A limiting protrusion (17) is provided on the inner side wall of the lever (123). The left and right ends of the lever (123) are respectively connected to the hole wall of the opening. A first groove (141) is formed, and a second groove (142) is formed between the non-connecting end of the lever (123) and the wall of the opening. The two ends of the second groove (142) are respectively connected to the two first grooves (141). A first protrusion (143) is provided on the outer wall of the connecting sleeve (1) to fit against the inner wall of the locking sleeve (12), and a second protrusion (144) is provided at the position corresponding to the second groove (142). The lower end face of the second protrusion (144) fits against the upper end face of the limiting protrusion (17). A third protrusion (145) is provided at the position corresponding to the stop protrusion (122) on the connecting sleeve (1). The third protrusion (145) extends into the "V" shaped through groove (124) for limiting, so as to prevent the locking sleeve (12) from rotating and shifting on the connecting sleeve (1).

4. The snap-fit ​​locking connector as described in claim 3, characterized in that: A second placement groove (116) is provided on the outer side wall of the connecting sleeve (1) at the position corresponding to the opening through groove (120). A second guide post (132) is provided in the second placement groove (116). The protruding end of the reset spring (14) is sleeved on the outside of the second guide post (132) and abuts against the bottom of the second placement groove (116).

5. The snap-fit ​​locking connector as described in claim 2, characterized in that: The upper housing assembly includes a male plug sleeve. (4) A placement hole (401) is provided axially through the male plug sleeve (4). A directional boss (41) is provided at one end of the outer side of the male plug sleeve (4), and a limiting boss (40) is provided at the other end. A limiting groove (42) is provided on the male plug sleeve (4) at the position corresponding to the position between the directional boss (41) and the limiting boss (40). A first compression spring (61) is provided in the placement hole (401). One end of the first compression spring (61) is connected to a retaining ring (40) fixed in the placement hole (401). 2) Fixed connection, the other end is fixedly connected to the upper valve core (2), and a first sealing ring (20) is embedded in the outer wall of the upper valve core (2). The outer wall of the first sealing ring (20) fits against the hole wall of the placement hole (401). During installation, the male plug sleeve (4) extends into the connecting sleeve (1) and passes through the clearance hole (111) and through the locking block (11). The upper end face of the limiting boss (40) abuts against the lower end face of the locking block (11) to limit the locking of the male plug sleeve (4).

6. The snap-fit ​​locking connector as described in claim 5, characterized in that: A transition slope (21) is provided around the outer side wall of the upper valve core (2). A limiting slope (403) is provided on the wall of the placement hole (401) at the position corresponding to the transition slope (21). The limiting slope (403) fits with the transition slope (21) and makes the end face of the non-connecting end of the upper valve core (2) flush with the end face of the corresponding end of the placement hole (401).

7. The snap-fit ​​locking connector as described in claim 2, characterized in that: The lower housing assembly also includes a female plug sleeve (7) that is screwed onto the connecting sleeve (1). A stepped hole (15) is provided inside the connecting sleeve (1). A push rod (50) extending into the small end of the stepped hole (15) is fixed inside the female plug sleeve (7). The extended end of the push rod (50) is sleeved in the directional hole (53) of the lower valve core (5). An installation groove (71) is provided inside the female plug sleeve (7) at a position corresponding to the position communicating with the connecting sleeve (1). An installation ring (54) is connected to one end of the push rod (50). The mounting ring (54) is fitted and fixed in the mounting groove (71); a second compression spring (62) is also fitted on the outside of the top rod (50); a connecting protrusion (52) is wound around one side of the lower valve core (5) in the circumferential direction; one end of the second compression spring (62) abuts against the lower end face of the connecting protrusion (52), and the other end abuts against the inner side wall of the mounting ring (54); a second sealing ring (51) is embedded on the outer side wall of the top rod (50), and the outer side wall of the second sealing ring (51) fits against the inner side wall of the directional hole (53).

8. The snap-fit ​​locking connector as described in claim 7, characterized in that: A transition hole (16) is provided between the through hole and the stepped hole (15). A sleeve (3) extending into the large end of the stepped hole (15) is sleeved on the outside of the second compression spring (62). An upper sealing ring (63), an isolation ring (60), and a lower sealing ring (64) are stacked from top to bottom between the end face of the extended end of the sleeve (3) and the bottom of the stepped hole (15). The upper end face of the upper sealing ring (63) abuts against the bottom of the stepped hole (15), and the lower end face of the lower sealing ring (64) abuts against the end face of the extended end of the sleeve (3). The isolation ring (60) is sleeved on the outside of the lower valve core (5), and the outer end face of the sleeve (3) abuts against the inner wall of the mounting ring (54).

9. The snap-fit ​​locking connector as described in claim 8, characterized in that: The stepped surface of the stepped hole (15) is a sloping structure that is narrow at the top and wide at the bottom. A first positioning slope (171) is provided on the outer side wall of the sleeve (3) at the position corresponding to the stepped surface of the stepped hole (15). A second positioning slope (172) is provided on the inner side wall of the sleeve (3) at the position corresponding to the first positioning slope (171). During installation, the sleeve (3) extends into the stepped hole (15), and the end face of the sleeve (3) extending into it abuts against the lower end face of the lower sealing ring (64). The first positioning slope (171) fits against the stepped surface of the stepped hole (15), and the second positioning slope (172) fits against the upper end face of the connecting protrusion (52).

10. The snap-fit ​​locking connector as described in claim 4, characterized in that: Both the second protrusion (144) and the limiting protrusion (17) are provided with inclined sections (18) to facilitate the movement and repositioning of the locking sleeve (12).

11. The snap-fit ​​locking connector as described in claim 2, characterized in that: The locking sleeve (12) is rotatable but not axially movable on the connecting sleeve (1), and the outer wall of the locking sleeve (12) is provided with a stop protrusion (120') that can abut against the extension section (113) and the locking sleeve (12).

12. The snap-fit ​​locking connector as described in claim 11, characterized in that: The locking sleeve (12) and the connecting sleeve (1) are equipped with anti-rotation structures. The anti-rotation structures can prevent the locking sleeve (12) from rotating when the stop protrusion (120') abuts against the extension section (113) and the locking sleeve (12).

13. The snap-fit ​​locking connector as described in claim 12, characterized in that: The anti-rotation structure includes an elastic paddle (121') disposed on the locking sleeve (12), the inner wall of the elastic paddle (121') has a protrusion, and the outer wall of the connecting sleeve (1) also has a protruding ridge (100') adapted to the protrusion.

14. The snap-fit ​​locking connector as described in claim 12, characterized in that: The anti-rotation structure also includes a first boss (123') on the locking sleeve (12) and a second boss (101') on the connecting sleeve (1). When the stop protrusion (120') is pressed between the extension section (113') and the locking sleeve (12), the first boss (123') and the second boss (101') are pressed together.

15. The snap-fit ​​locking connector as described in claim 11, characterized in that: The inner wall of the extension section (113) has a second arc surface (102'), and the stop protrusion (122') has a first arc surface (102') that is adapted to the second arc surface (102').

16. The snap-fit ​​locking connector as described in claim 11, characterized in that: The locking sleeve (12) is also provided with an opening (125') for avoiding the return spring (14), and the extension (113) and the locking sleeve (12) have corresponding markings (126').

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